Changelog entry for #1265 :

- Merge #1265: Fix WSAPoll.
Fix WSAPoll (#1265 )
2026-08-17 21:25:50 +02:00 · 2025-04-11 15:10:46 +02:00 · 2025-04-11 15:09:07 +02:00 · 2025-04-10 09:33:51 +02:00 · 2025-04-09 14:20:22 +02:00 · 2025-04-09 14:13:58 +02:00
291 changed files with 29475 additions and 1557 deletions
@@ -31,12 +31,12 @@ jobs:
            clang_analysis: "yes"
          - name: OS X
            os: macos-latest
-            install_expat: "yes"
+            install_expat: "no"
            config: "--enable-debug --disable-flto --with-ssl=/opt/homebrew/opt/openssl --with-libexpat=/opt/homebrew/opt/expat"
            make_test: "yes"
          - name: Clang on OS X
            os: macos-latest
-            install_expat: "yes"
+            install_expat: "no"
            config: "CC=clang --enable-debug --disable-flto --with-ssl=/opt/homebrew/opt/openssl --with-libexpat=/opt/homebrew/opt/expat --disable-static"
            make_test: "yes"
            clang_analysis: "yes"
@@ -161,13 +161,44 @@ jobs:
            test_windows: "yes"
            config: "no"
            make: "no"
+          - name: FreeBSD
+            os: ubuntu-latest
+            config: "no"
+            make: "no"
+            with_cross_platform_action: "yes"
+            cross_platform_os: "freebsd"
+            cross_platform_arch: "x86-64"
+            cross_platform_version: "14.1"
+            cross_platform_config: "--enable-debug --disable-flto --with-libevent --disable-static"
+          - name: OpenBSD
+            os: ubuntu-latest
+            config: "no"
+            make: "no"
+            with_cross_platform_action: "yes"
+            cross_platform_os: "openbsd"
+            cross_platform_arch: "x86-64"
+            cross_platform_version: "7.5"
+            cross_platform_config: "--enable-debug --disable-flto --with-libevent --disable-static"
+          - name: NetBSD
+            os: ubuntu-latest
+            config: "no"
+            make: "no"
+            with_cross_platform_action: "yes"
+            cross_platform_os: "netbsd"
+            cross_platform_arch: "x86-64"
+            cross_platform_version: "10.0"
+            cross_platform_config: "--enable-debug --disable-flto --with-libevent --disable-static"
 
    steps:
      - uses: actions/checkout@v4
        with:
          submodules: false
+          persist-credentials: false
      - name: test_windows
        if: ${{ matrix.test_windows == 'yes' }}
+        env:
+          LIBEXPAT_FNAME: expat-2.7.0
+          LIBEXPAT_VERSION_DIR: R_2_7_0
        shell: bash
        run: |
          export unboundpath=`pwd`
@@ -210,9 +241,9 @@ jobs:
          cd ..
          mkdir expat
          echo "curl expat"
-          curl -L -k -s -S -o expat-2.2.10.tar.gz https://github.com/libexpat/libexpat/releases/download/R_2_2_10/expat-2.2.10.tar.gz
-          tar xzf expat-2.2.10.tar.gz
-          cd expat-2.2.10
+          curl -L -k -s -S -o $LIBEXPAT_FNAME.tar.gz https://github.com/libexpat/libexpat/releases/download/$LIBEXPAT_VERSION_DIR/$LIBEXPAT_FNAME.tar.gz
+          tar xzf $LIBEXPAT_FNAME.tar.gz
+          cd $LIBEXPAT_FNAME
          echo "./configure SHELL=/usr/bin/bash CONFIG_SHELL=/usr/bin/bash --prefix=\"$prepath/expat\" --exec-prefix=\"$prepath/expat\" --bindir=\"$prepath/expat/bin\" --includedir=\"$prepath/expat/include\" --mandir=\"$prepath/expat/man\" --libdir=\"$prepath/expat/lib\""
          ./configure SHELL=/usr/bin/bash CONFIG_SHELL=/usr/bin/bash --prefix="$prepath/expat" --exec-prefix="$prepath/expat" --bindir="$prepath/expat/bin" --includedir="$prepath/expat/include" --mandir="$prepath/expat/man" --libdir="$prepath/expat/lib"
          # fixup SHELL is treated specially, but SHELZZ is not by make.
@@ -331,6 +362,33 @@ jobs:
          echo "::group::make install"
          make install
          echo "::endgroup::"
+      - name: cross-platform-action on ${{ matrix.cross_platform_os }} ${{ matrix.cross_platform_version }}
+        if: ${{ matrix.with_cross_platform_action == 'yes' }}
+        uses: cross-platform-actions/action@v0.25.0
+        env:
+          CROSS_PLATFORM_OS: ${{ matrix.cross_platform_os }}
+        with:
+          environment_variables: CROSS_PLATFORM_OS
+          operating_system: ${{ matrix.cross_platform_os }}
+          architecture: ${{ matrix.cross_platform_arch }}
+          version: ${{ matrix.cross_platform_version }}
+          shell: bash
+          memory: 4G
+          cpu_count: 2
+          run: |
+            set -e -x
+            if test "$CROSS_PLATFORM_OS" = "freebsd"; then sudo pkg install -y openssl libevent expat; fi
+            if test "$CROSS_PLATFORM_OS" = "openbsd"; then sudo pkg_add libevent; fi
+            if test "$CROSS_PLATFORM_OS" = "netbsd"; then sudo pkgin -y install libevent; fi
+            echo "::group::configure"
+            ./configure ${{ matrix.cross_platform_config }}
+            echo "::endgroup::"
+            echo "::group::make"
+            make
+            echo "::endgroup::"
+            echo "::group::make test"
+            make test
+            echo "::endgroup::"
      - name: install libevent
        if: ${{ matrix.install_libevent == 'yes' }}
        run: sudo apt-get install libevent-dev
@@ -13,6 +13,8 @@ jobs:

    steps:
    - uses: actions/checkout@v4
+      with:
+        persist-credentials: false
    - name: configure
      run: ./configure --enable-debug
    - name: make
@@ -36,6 +36,7 @@
 /asynclook
 /delayer
 /dohclient
+/doqclient
 /lock-verify
 /memstats
 /perf
@@ -179,11 +179,11 @@ testcode/unitlruhash.c testcode/unitmain.c testcode/unitmsgparse.c \
 testcode/unitneg.c testcode/unitregional.c testcode/unitslabhash.c \
 testcode/unitverify.c testcode/readhex.c testcode/testpkts.c testcode/unitldns.c \
 testcode/unitecs.c testcode/unitauth.c testcode/unitzonemd.c \
-testcode/unittcpreuse.c
+testcode/unittcpreuse.c testcode/unitdoq.c testcode/unitinfra.c
 UNITTEST_OBJ=unitanchor.lo unitdname.lo unitlruhash.lo unitmain.lo \
 unitmsgparse.lo unitneg.lo unitregional.lo unitslabhash.lo unitverify.lo \
 readhex.lo testpkts.lo unitldns.lo unitecs.lo unitauth.lo unitzonemd.lo \
-unittcpreuse.lo
+unittcpreuse.lo unitdoq.lo unitinfra.lo
 UNITTEST_OBJ_LINK=$(UNITTEST_OBJ) worker_cb.lo $(COMMON_OBJ) $(SLDNS_OBJ) \
 $(COMPAT_OBJ)
 DAEMON_SRC=daemon/acl_list.c daemon/cachedump.c daemon/daemon.c \
@@ -242,6 +242,10 @@ DOHCLIENT_SRC=testcode/dohclient.c
 DOHCLIENT_OBJ=dohclient.lo
 DOHCLIENT_OBJ_LINK=$(DOHCLIENT_OBJ) worker_cb.lo $(COMMON_OBJ) $(COMPAT_OBJ) \
 $(SLDNS_OBJ)
+DOQCLIENT_SRC=testcode/doqclient.c
+DOQCLIENT_OBJ=doqclient.lo
+DOQCLIENT_OBJ_LINK=$(DOQCLIENT_OBJ) $(COMMON_OBJ) $(COMPAT_OBJ) \
+$(SLDNS_OBJ)
 PERF_SRC=testcode/perf.c
 PERF_OBJ=perf.lo
 PERF_OBJ_LINK=$(PERF_OBJ) worker_cb.lo $(COMMON_OBJ) $(COMPAT_OBJ) $(SLDNS_OBJ)
@@ -288,7 +292,7 @@ ALL_SRC=$(COMMON_SRC) $(UNITTEST_SRC) $(DAEMON_SRC) \
 	$(CONTROL_SRC) $(UBANCHOR_SRC) $(PETAL_SRC) $(DNSTAP_SOCKET_SRC)\
 	$(PYTHONMOD_SRC) $(PYUNBOUND_SRC) $(WIN_DAEMON_THE_SRC) \
 	$(SVCINST_SRC) $(SVCUNINST_SRC) $(ANCHORUPD_SRC) $(SLDNS_SRC) \
-	$(DOHCLIENT_SRC) $(READZONE_SRC)
+	$(DOHCLIENT_SRC) $(DOQCLIENT_SRC) $(READZONE_SRC)

 ALL_OBJ=$(COMMON_OBJ) $(UNITTEST_OBJ) $(DAEMON_OBJ) \
 	$(TESTBOUND_OBJ) $(LOCKVERIFY_OBJ) $(PKTVIEW_OBJ) \
@@ -297,7 +301,7 @@ ALL_OBJ=$(COMMON_OBJ) $(UNITTEST_OBJ) $(DAEMON_OBJ) \
 	$(CONTROL_OBJ) $(UBANCHOR_OBJ) $(PETAL_OBJ) $(DNSTAP_SOCKET_OBJ)\
 	$(COMPAT_OBJ) $(PYUNBOUND_OBJ) \
 	$(SVCINST_OBJ) $(SVCUNINST_OBJ) $(ANCHORUPD_OBJ) $(SLDNS_OBJ) \
-	$(DOHCLIENT_OBJ) $(READZONE_OBJ)
+	$(DOHCLIENT_OBJ) $(DOQCLIENT_OBJ) $(READZONE_OBJ)

 COMPILE=$(LIBTOOL) --tag=CC --mode=compile $(CC) $(CPPFLAGS) $(CFLAGS) @PTHREAD_CFLAGS_ONLY@
 LINK=$(LIBTOOL) --tag=CC --mode=link $(CC) $(staticexe) $(RUNTIME_PATH) $(CPPFLAGS) $(CFLAGS) $(LDFLAGS)
@@ -334,7 +338,7 @@ rsrc_unbound_checkconf.o:	$(srcdir)/winrc/rsrc_unbound_checkconf.rc config.h
 TEST_BIN=asynclook$(EXEEXT) delayer$(EXEEXT) \
 	lock-verify$(EXEEXT) memstats$(EXEEXT) perf$(EXEEXT) \
 	petal$(EXEEXT) pktview$(EXEEXT) streamtcp$(EXEEXT) \
-	$(DNSTAP_SOCKET_TESTBIN) dohclient$(EXEEXT) \
+	$(DNSTAP_SOCKET_TESTBIN) dohclient$(EXEEXT) doqclient$(EXEEXT) \
 	testbound$(EXEEXT) unittest$(EXEEXT) readzone$(EXEEXT)
 tests:	all $(TEST_BIN)

@@ -416,6 +420,9 @@ streamtcp$(EXEEXT):	$(STREAMTCP_OBJ_LINK)
 dohclient$(EXEEXT):	$(DOHCLIENT_OBJ_LINK)
 	$(LINK) -o $@ $(DOHCLIENT_OBJ_LINK) $(SSLLIB) $(LIBS)

+doqclient$(EXEEXT):	$(DOQCLIENT_OBJ_LINK)
+	$(LINK) -o $@ $(DOQCLIENT_OBJ_LINK) $(SSLLIB) $(LIBS)
+
 perf$(EXEEXT):	$(PERF_OBJ_LINK)
 	$(LINK) -o $@ $(PERF_OBJ_LINK) $(SSLLIB) $(LIBS)

@@ -502,10 +509,15 @@ util/configlexer.c:  $(srcdir)/util/configlexer.lex util/configparser.h
 	fi
 	@if test ! -f $@; then echo "No $@ : need flex and bison to compile from source repository"; exit 1; fi

-util/configparser.c util/configparser.h:  $(srcdir)/util/configparser.y
+# Builds both util/configparser.c and util/configparser.h.
+# To avoid double-building we split one target out.
+util/configparser.c:  $(srcdir)/util/configparser.y
 	@-if test ! -d util; then $(INSTALL) -d util; fi
 	$(YACC) -d -o util/configparser.c $(srcdir)/util/configparser.y

+util/configparser.h: util/configparser.c
+	touch $@
+
 clean:
 	rm -f *.o *.d *.lo *~ tags
 	rm -f unbound$(EXEEXT) unbound-checkconf$(EXEEXT) unbound-host$(EXEEXT) unbound-control$(EXEEXT) unbound-anchor$(EXEEXT) unbound-control-setup libunbound.la unbound.h
@@ -703,6 +715,8 @@ depend:

 # build rules
 ipset.lo ipset.o: $(srcdir)/ipset/ipset.c
+doqclient.lo doqclient.o: $(srcdir)/testcode/doqclient.c
+unitdoq.lo unitdoq.o: $(srcdir)/testcode/unitdoq.c

 # Dependencies
 dns.lo dns.o: $(srcdir)/services/cache/dns.c config.h $(srcdir)/iterator/iter_delegpt.h $(srcdir)/util/log.h \
@@ -867,7 +881,7 @@ view.lo view.o: $(srcdir)/services/view.c config.h $(srcdir)/services/view.h $(s
 $(srcdir)/util/locks.h $(srcdir)/util/log.h $(srcdir)/services/localzone.h $(srcdir)/util/storage/dnstree.h \
 $(srcdir)/util/module.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/data/msgreply.h \
 $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/data/msgparse.h $(srcdir)/sldns/pkthdr.h \
- $(srcdir)/sldns/rrdef.h $(srcdir)/sldns/sbuffer.h $(srcdir)/util/config_file.h
+ $(srcdir)/sldns/rrdef.h $(srcdir)/sldns/sbuffer.h $(srcdir)/util/config_file.h $(srcdir)/respip/respip.h
 rpz.lo rpz.o: $(srcdir)/services/rpz.c config.h $(srcdir)/services/rpz.h $(srcdir)/services/localzone.h \
 $(srcdir)/util/rbtree.h $(srcdir)/util/locks.h $(srcdir)/util/log.h $(srcdir)/util/storage/dnstree.h \
 $(srcdir)/util/module.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/data/msgreply.h \
@@ -963,7 +977,7 @@ fptr_wlist.lo fptr_wlist.o: $(srcdir)/util/fptr_wlist.c config.h $(srcdir)/util/
 $(srcdir)/validator/val_nsec3.h $(srcdir)/validator/val_sigcrypt.h $(srcdir)/validator/val_kentry.h \
 $(srcdir)/validator/val_neg.h $(srcdir)/validator/autotrust.h $(srcdir)/libunbound/libworker.h \
 $(srcdir)/libunbound/context.h $(srcdir)/util/alloc.h $(srcdir)/libunbound/unbound-event.h \
- $(srcdir)/libunbound/worker.h
+ $(srcdir)/libunbound/worker.h $(srcdir)/daemon/remote.h
 locks.lo locks.o: $(srcdir)/util/locks.c config.h $(srcdir)/util/locks.h $(srcdir)/util/log.h
 log.lo log.o: $(srcdir)/util/log.c config.h $(srcdir)/util/log.h $(srcdir)/util/locks.h $(srcdir)/sldns/sbuffer.h
 mini_event.lo mini_event.o: $(srcdir)/util/mini_event.c config.h $(srcdir)/util/mini_event.h $(srcdir)/util/rbtree.h \
@@ -1050,7 +1064,7 @@ tube.lo tube.o: $(srcdir)/util/tube.c config.h $(srcdir)/util/tube.h $(srcdir)/u
 $(srcdir)/libunbound/unbound.h $(srcdir)/respip/respip.h $(srcdir)/util/ub_event.h
 ub_event.lo ub_event.o: $(srcdir)/util/ub_event.c config.h $(srcdir)/util/ub_event.h $(srcdir)/util/log.h \
 $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h  \
- $(srcdir)/util/tube.h $(srcdir)/util/mini_event.h $(srcdir)/util/rbtree.h
+ $(srcdir)/util/tube.h $(srcdir)/util/mini_event.h $(srcdir)/util/rbtree.h $(srcdir)/daemon/remote.h
 ub_event_pluggable.lo ub_event_pluggable.o: $(srcdir)/util/ub_event_pluggable.c config.h $(srcdir)/util/ub_event.h \
 $(srcdir)/libunbound/unbound-event.h $(srcdir)/util/netevent.h $(srcdir)/dnscrypt/dnscrypt.h \
  $(srcdir)/util/log.h $(srcdir)/util/fptr_wlist.h \
@@ -1247,6 +1261,7 @@ unitzonemd.lo unitzonemd.o: $(srcdir)/testcode/unitzonemd.c config.h $(srcdir)/u
 $(srcdir)/validator/val_anchor.h
 unittcpreuse.lo unittcpreuse.o: $(srcdir)/testcode/unittcpreuse.c config.h $(srcdir)/services/outside_network.h \
 $(srcdir)/util/random.h
+unitinfra.lo unitinfra.o: $(srcdir)/testcode/unitinfra.c config.h $(srcdir)/util/config_file.h $(srcdir)/util/net_help.h $(srcdir)/iterator/iterator.h
 acl_list.lo acl_list.o: $(srcdir)/daemon/acl_list.c config.h $(srcdir)/daemon/acl_list.h \
 $(srcdir)/util/storage/dnstree.h $(srcdir)/util/rbtree.h $(srcdir)/services/view.h $(srcdir)/util/locks.h \
 $(srcdir)/util/log.h $(srcdir)/util/regional.h $(srcdir)/util/config_file.h $(srcdir)/util/net_help.h \
@@ -1298,7 +1313,10 @@ remote.lo remote.o: $(srcdir)/daemon/remote.c config.h $(srcdir)/daemon/remote.h
 $(srcdir)/validator/val_anchor.h $(srcdir)/iterator/iterator.h $(srcdir)/services/outbound_list.h \
 $(srcdir)/iterator/iter_fwd.h $(srcdir)/iterator/iter_hints.h $(srcdir)/iterator/iter_delegpt.h \
 $(srcdir)/services/outside_network.h $(srcdir)/sldns/str2wire.h $(srcdir)/sldns/parseutil.h \
- $(srcdir)/sldns/wire2str.h
+ $(srcdir)/sldns/wire2str.h $(srcdir)/util/edns.h \
+ $(srcdir)/util/locks.h $(srcdir)/util/ub_event.h \
+ $(srcdir)/util/tcp_conn_limit.h $(srcdir)/util/edns.h $(srcdir)/validator/val_neg.h \
+ $(srcdir)/iterator/iter_utils.h $(srcdir)/iterator/iter_donotq.h $(srcdir)/iterator/iter_priv.h
 stats.lo stats.o: $(srcdir)/daemon/stats.c config.h $(srcdir)/daemon/stats.h $(srcdir)/util/timehist.h \
 $(srcdir)/libunbound/unbound.h $(srcdir)/daemon/worker.h $(srcdir)/libunbound/worker.h $(srcdir)/sldns/sbuffer.h \
 $(srcdir)/util/data/packed_rrset.h $(srcdir)/util/storage/lruhash.h $(srcdir)/util/locks.h $(srcdir)/util/log.h \
@@ -0,0 +1,70 @@
+# ===========================================================================
+#   https://www.gnu.org/software/autoconf-archive/ax_build_date_epoch.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+#   AX_BUILD_DATE_EPOCH(VARIABLE[, FORMAT[, ACTION-IF-FAIL]])
+#
+# DESCRIPTION
+#
+#   Sets VARIABLE to a string representing the current time.  It is
+#   formatted according to FORMAT if specified, otherwise it is formatted as
+#   the number of seconds (excluding leap seconds) since the UNIX epoch (01
+#   Jan 1970 00:00:00 UTC).
+#
+#   If the SOURCE_DATE_EPOCH environment variable is set, it uses the value
+#   of that variable instead of the current time.  See
+#   https://reproducible-builds.org/specs/source-date-epoch).  If
+#   SOURCE_DATE_EPOCH is set but cannot be properly interpreted as a UNIX
+#   timestamp, then execute ACTION-IF-FAIL if specified, otherwise error.
+#
+#   VARIABLE is AC_SUBST-ed.
+#
+# LICENSE
+#
+#   Copyright (c) 2016 Eric Bavier <bavier@member.fsf.org>
+#
+#   This program is free software: you can redistribute it and/or modify it
+#   under the terms of the GNU General Public License as published by the
+#   Free Software Foundation, either version 3 of the License, or (at your
+#   option) any later version.
+#
+#   This program is distributed in the hope that it will be useful, but
+#   WITHOUT ANY WARRANTY; without even the implied warranty of
+#   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+#   Public License for more details.
+#
+#   You should have received a copy of the GNU General Public License along
+#   with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+#   As a special exception, the respective Autoconf Macro's copyright owner
+#   gives unlimited permission to copy, distribute and modify the configure
+#   scripts that are the output of Autoconf when processing the Macro. You
+#   need not follow the terms of the GNU General Public License when using
+#   or distributing such scripts, even though portions of the text of the
+#   Macro appear in them. The GNU General Public License (GPL) does govern
+#   all other use of the material that constitutes the Autoconf Macro.
+#
+#   This special exception to the GPL applies to versions of the Autoconf
+#   Macro released by the Autoconf Archive. When you make and distribute a
+#   modified version of the Autoconf Macro, you may extend this special
+#   exception to the GPL to apply to your modified version as well.
+
+#serial 2
+
+AC_DEFUN([AX_BUILD_DATE_EPOCH],
+[dnl
+AC_MSG_CHECKING([for build time])
+ax_date_fmt="m4_default($2,%s)"
+AS_IF([test x"$SOURCE_DATE_EPOCH" = x],
+ [$1=`date "+$ax_date_fmt"`],
+ [ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+                 || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+  AS_IF([test x"$ax_build_date" = x],
+   [m4_ifval([$3],
+      [$3],
+      [AC_MSG_ERROR([malformed SOURCE_DATE_EPOCH])])],
+   [$1=$ax_build_date])])
+AC_MSG_RESULT([$$1])
+])dnl AX_BUILD_DATE_EPOCH
@@ -47,6 +47,7 @@
 #include "util/regional.h"
 #include "util/net_help.h"
 #include "util/config_file.h"
+#include "util/data/dname.h"
 #include "util/data/msgreply.h"
 #include "util/data/msgencode.h"
 #include "services/cache/dns.h"
@@ -341,6 +342,7 @@ calc_hash(struct query_info* qinfo, struct module_env* env, char* buf,
 	/* copy the hash info into the clear buffer */
 	if(clen + qinfo->qname_len < sizeof(clear)) {
 		memmove(clear+clen, qinfo->qname, qinfo->qname_len);
+		query_dname_tolower(clear+clen);
 		clen += qinfo->qname_len;
 	}
 	if(clen + 4 < sizeof(clear)) {
@@ -621,6 +623,9 @@ parse_data(struct module_qstate* qstate, struct sldns_buffer* buf,
 	}
 	verbose(VERB_ALGO, "cachedb msg adjusted down by %d", (int)adjust);
 	adjust_msg_ttl(qstate->return_msg, adjust);
+	if(qstate->env->cfg->aggressive_nsec) {
+		limit_nsec_ttl(qstate->return_msg);
+	}

 	/* Similar to the unbound worker, if serve-expired is enabled and
 	 * the msg would be considered to be expired, mark the state so a
@@ -752,7 +757,8 @@ cachedb_intcache_store(struct module_qstate* qstate, int msg_expired)
 	}
 	(void)dns_cache_store(qstate->env, &qstate->qinfo,
 		qstate->return_msg->rep, 0, qstate->prefetch_leeway, 0,
-		qstate->region, store_flags, qstate->qstarttime);
+		qstate->region, store_flags, qstate->qstarttime,
+		qstate->is_valrec);
 	if(serve_expired && msg_expired) {
 		if(qstate->env->cfg->serve_expired_client_timeout) {
 			/* No expired response from the query state, the
@@ -828,8 +834,6 @@ cachedb_handle_query(struct module_qstate* qstate,
 		/* In case we have expired data but there is a client timer for expired
 		 * answers, pass execution to next module in order to try updating the
 		 * data first.
-		 * TODO: this needs revisit. The expired data stored from cachedb has
-		 * 0 TTL which is picked up by iterator later when looking in the cache.
 		 */
 		if(qstate->env->cfg->serve_expired && msg_expired) {
 			qstate->return_msg = NULL;
@@ -52,18 +52,38 @@
 #include "hiredis/hiredis.h"

 struct redis_moddata {
-	redisContext** ctxs;	/* thread-specific redis contexts */
-	int numctxs;		/* number of ctx entries */
-	const char* server_host; /* server's IP address or host name */
-	int server_port;	 /* server's TCP port */
-	const char* server_path; /* server's unix path, or "", NULL if unused */
-	const char* server_password; /* server's AUTH password, or "", NULL if unused */
-	struct timeval timeout;	 /* timeout for connection setup and commands */
-	int logical_db;		/* the redis logical database to use */
+	/* thread-specific redis contexts */
+	redisContext** ctxs;
+	redisContext** replica_ctxs;
+	/* number of ctx entries */
+	int numctxs;
+	/* server's IP address or host name */
+	const char* server_host;
+	const char* replica_server_host;
+	/* server's TCP port */
+	int server_port;
+	int replica_server_port;
+	/* server's unix path, or "", NULL if unused */
+	const char* server_path;
+	const char* replica_server_path;
+	/* server's AUTH password, or "", NULL if unused */
+	const char* server_password;
+	const char* replica_server_password;
+	/* timeout for commands */
+	struct timeval command_timeout;
+	struct timeval replica_command_timeout;
+	/* timeout for connection setup */
+	struct timeval connect_timeout;
+	struct timeval replica_connect_timeout;
+	/* the redis logical database to use */
+	int logical_db;
+	int replica_logical_db;
+	/* if the SET with EX command is supported */
+	int set_with_ex_available;
 };

 static redisReply* redis_command(struct module_env*, struct cachedb_env*,
-	const char*, const uint8_t*, size_t);
+	const char*, const uint8_t*, size_t, int);

 static void
 moddata_clean(struct redis_moddata** moddata) {
@@ -77,21 +97,30 @@ moddata_clean(struct redis_moddata** moddata) {
 		}
 		free((*moddata)->ctxs);
 	}
+	if((*moddata)->replica_ctxs) {
+		int i;
+		for(i = 0; i < (*moddata)->numctxs; i++) {
+			if((*moddata)->replica_ctxs[i])
+				redisFree((*moddata)->replica_ctxs[i]);
+		}
+		free((*moddata)->replica_ctxs);
+	}
 	free(*moddata);
 	*moddata = NULL;
 }

 static redisContext*
-redis_connect(const struct redis_moddata* moddata)
+redis_connect(const char* host, int port, const char* path,
+	const char* password, int logical_db,
+	const struct timeval connect_timeout,
+	const struct timeval command_timeout)
 {
 	redisContext* ctx;

-	if(moddata->server_path && moddata->server_path[0]!=0) {
-		ctx = redisConnectUnixWithTimeout(moddata->server_path,
-			moddata->timeout);
+	if(path && path[0]!=0) {
+		ctx = redisConnectUnixWithTimeout(path, connect_timeout);
 	} else {
-		ctx = redisConnectWithTimeout(moddata->server_host,
-			moddata->server_port, moddata->timeout);
+		ctx = redisConnectWithTimeout(host, port, connect_timeout);
 	}
 	if(!ctx || ctx->err) {
 		const char *errstr = "out of memory";
@@ -100,13 +129,13 @@ redis_connect(const struct redis_moddata* moddata)
 		log_err("failed to connect to redis server: %s", errstr);
 		goto fail;
 	}
-	if(redisSetTimeout(ctx, moddata->timeout) != REDIS_OK) {
-		log_err("failed to set redis timeout");
+	if(redisSetTimeout(ctx, command_timeout) != REDIS_OK) {
+		log_err("failed to set redis timeout, %s", ctx->errstr);
 		goto fail;
 	}
-	if(moddata->server_password && moddata->server_password[0]!=0) {
+	if(password && password[0]!=0) {
 		redisReply* rep;
-		rep = redisCommand(ctx, "AUTH %s", moddata->server_password);
+		rep = redisCommand(ctx, "AUTH %s", password);
 		if(!rep || rep->type == REDIS_REPLY_ERROR) {
 			log_err("failed to authenticate with password");
 			freeReplyObject(rep);
@@ -114,18 +143,25 @@ redis_connect(const struct redis_moddata* moddata)
 		}
 		freeReplyObject(rep);
 	}
-	if(moddata->logical_db > 0) {
+	if(logical_db > 0) {
 		redisReply* rep;
-		rep = redisCommand(ctx, "SELECT %d", moddata->logical_db);
+		rep = redisCommand(ctx, "SELECT %d", logical_db);
 		if(!rep || rep->type == REDIS_REPLY_ERROR) {
 			log_err("failed to set logical database (%d)",
-				moddata->logical_db);
+				logical_db);
 			freeReplyObject(rep);
 			goto fail;
 		}
 		freeReplyObject(rep);
 	}
-	verbose(VERB_OPS, "Connection to Redis established");
+	if(verbosity >= VERB_OPS) {
+		char port_str[6+1];
+		port_str[0] = ' ';
+		(void)snprintf(port_str+1, sizeof(port_str)-1, "%d", port);
+		verbose(VERB_OPS, "Connection to Redis established (%s%s)",
+			path&&path[0]!=0?path:host,
+			path&&path[0]!=0?"":port_str);
+	}
 	return ctx;

 fail:
@@ -134,6 +170,14 @@ fail:
 	return NULL;
 }

+static void
+set_timeout(struct timeval* timeout, int value, int explicit_value)
+{
+	int v = explicit_value != 0 ? explicit_value : value;
+	timeout->tv_sec = v / 1000;
+	timeout->tv_usec = (v % 1000) * 1000;
+}
+
 static int
 redis_init(struct module_env* env, struct cachedb_env* cachedb_env)
 {
@@ -148,41 +192,98 @@ redis_init(struct module_env* env, struct cachedb_env* cachedb_env)
 		goto fail;
 	}
 	moddata->numctxs = env->cfg->num_threads;
+	/* note: server_host and similar string configuration options are
+	 * shallow references to configured strings; we don't have to free them
+	 * in this module. */
+	moddata->server_host = env->cfg->redis_server_host;
+	moddata->replica_server_host = env->cfg->redis_replica_server_host;
+
+	moddata->server_port = env->cfg->redis_server_port;
+	moddata->replica_server_port = env->cfg->redis_replica_server_port;
+
+	moddata->server_path = env->cfg->redis_server_path;
+	moddata->replica_server_path = env->cfg->redis_replica_server_path;
+
+	moddata->server_password = env->cfg->redis_server_password;
+	moddata->replica_server_password = env->cfg->redis_replica_server_password;
+
+	set_timeout(&moddata->command_timeout,
+		env->cfg->redis_timeout,
+		env->cfg->redis_command_timeout);
+	set_timeout(&moddata->replica_command_timeout,
+		env->cfg->redis_replica_timeout,
+		env->cfg->redis_replica_command_timeout);
+	set_timeout(&moddata->connect_timeout,
+		env->cfg->redis_timeout,
+		env->cfg->redis_connect_timeout);
+	set_timeout(&moddata->replica_connect_timeout,
+		env->cfg->redis_replica_timeout,
+		env->cfg->redis_replica_connect_timeout);
+
+	moddata->logical_db = env->cfg->redis_logical_db;
+	moddata->replica_logical_db = env->cfg->redis_replica_logical_db;
+
 	moddata->ctxs = calloc(env->cfg->num_threads, sizeof(redisContext*));
 	if(!moddata->ctxs) {
 		log_err("out of memory");
 		goto fail;
 	}
-	/* note: server_host is a shallow reference to configured string.
-	 * we don't have to free it in this module. */
-	moddata->server_host = env->cfg->redis_server_host;
-	moddata->server_port = env->cfg->redis_server_port;
-	moddata->server_path = env->cfg->redis_server_path;
-	moddata->server_password = env->cfg->redis_server_password;
-	moddata->timeout.tv_sec = env->cfg->redis_timeout / 1000;
-	moddata->timeout.tv_usec = (env->cfg->redis_timeout % 1000) * 1000;
-	moddata->logical_db = env->cfg->redis_logical_db;
-	for(i = 0; i < moddata->numctxs; i++) {
-		redisContext* ctx = redis_connect(moddata);
-		if(!ctx) {
-			log_err("redis_init: failed to init redis");
+	if((moddata->replica_server_host && moddata->replica_server_host[0]!=0)
+		|| (moddata->replica_server_path && moddata->replica_server_path[0]!=0)) {
+		/* There is a replica configured, allocate ctxs */
+		moddata->replica_ctxs = calloc(env->cfg->num_threads, sizeof(redisContext*));
+		if(!moddata->replica_ctxs) {
+			log_err("out of memory");
 			goto fail;
 		}
+	}
+	for(i = 0; i < moddata->numctxs; i++) {
+		redisContext* ctx = redis_connect(
+			moddata->server_host,
+			moddata->server_port,
+			moddata->server_path,
+			moddata->server_password,
+			moddata->logical_db,
+			moddata->connect_timeout,
+			moddata->command_timeout);
+		if(!ctx) {
+			log_err("redis_init: failed to init redis "
+				"(for thread %d)", i);
+			/* And continue, the context can be established
+			 * later, just like after a disconnect. */
+		}
 		moddata->ctxs[i] = ctx;
 	}
+	if(moddata->replica_ctxs) {
+		for(i = 0; i < moddata->numctxs; i++) {
+			redisContext* ctx = redis_connect(
+				moddata->replica_server_host,
+				moddata->replica_server_port,
+				moddata->replica_server_path,
+				moddata->replica_server_password,
+				moddata->replica_logical_db,
+				moddata->replica_connect_timeout,
+				moddata->replica_command_timeout);
+			if(!ctx) {
+				log_err("redis_init: failed to init redis "
+					"replica (for thread %d)", i);
+				/* And continue, the context can be established
+				* later, just like after a disconnect. */
+			}
+			moddata->replica_ctxs[i] = ctx;
+		}
+	}
 	cachedb_env->backend_data = moddata;
-	if(env->cfg->redis_expire_records) {
+	if(env->cfg->redis_expire_records &&
+		moddata->ctxs[env->alloc->thread_num] != NULL) {
 		redisReply* rep = NULL;
 		int redis_reply_type = 0;
-		/** check if setex command is supported */
+		/** check if set with ex command is supported */
 		rep = redis_command(env, cachedb_env,
-			"SETEX __UNBOUND_REDIS_CHECK__ 1 none", NULL, 0);
+			"SET __UNBOUND_REDIS_CHECK__ none EX 1", NULL, 0, 1);
 		if(!rep) {
 			/** init failed, no response from redis server*/
-			log_err("redis_init: failed to init redis, the "
-				"redis-expire-records option requires the SETEX command "
-				"(redis >= 2.0.0)");
-			goto fail;
+			goto set_with_ex_fail;
 		}
 		redis_reply_type = rep->type;
 		freeReplyObject(rep);
@@ -190,15 +291,18 @@ redis_init(struct module_env* env, struct cachedb_env* cachedb_env)
 		case REDIS_REPLY_STATUS:
 			break;
 		default:
-			/** init failed, setex command not supported */
-			log_err("redis_init: failed to init redis, the "
-				"redis-expire-records option requires the SETEX command "
-				"(redis >= 2.0.0)");
-			goto fail;
+			/** init failed, set_with_ex command not supported */
+			goto set_with_ex_fail;
 		}
+		moddata->set_with_ex_available = 1;
 	}
 	return 1;

+set_with_ex_fail:
+	log_err("redis_init: failure during redis_init, the "
+		"redis-expire-records option requires the SET with EX command "
+		"(redis >= 2.6.2)");
+	return 1;
 fail:
 	moddata_clean(&moddata);
 	return 0;
@@ -229,9 +333,9 @@ redis_deinit(struct module_env* env, struct cachedb_env* cachedb_env)
 */
 static redisReply*
 redis_command(struct module_env* env, struct cachedb_env* cachedb_env,
-	const char* command, const uint8_t* data, size_t data_len)
+	const char* command, const uint8_t* data, size_t data_len, int write)
 {
-	redisContext* ctx;
+	redisContext* ctx, **ctx_selector;
 	redisReply* rep;
 	struct redis_moddata* d = (struct redis_moddata*)
 		cachedb_env->backend_data;
@@ -242,17 +346,38 @@ redis_command(struct module_env* env, struct cachedb_env* cachedb_env,
 	 * assumption throughout the unbound architecture, so we simply assert
 	 * it. */
 	log_assert(env->alloc->thread_num < d->numctxs);
-	ctx = d->ctxs[env->alloc->thread_num];
+
+	ctx_selector = !write && d->replica_ctxs
+		?d->replica_ctxs
+		:d->ctxs;
+	ctx = ctx_selector[env->alloc->thread_num];

 	/* If we've not established a connection to the server or we've closed
 	 * it on a failure, try to re-establish a new one.   Failures will be
 	 * logged in redis_connect(). */
 	if(!ctx) {
-		ctx = redis_connect(d);
-		d->ctxs[env->alloc->thread_num] = ctx;
+		if(!write && d->replica_ctxs) {
+			ctx = redis_connect(
+				d->replica_server_host,
+				d->replica_server_port,
+				d->replica_server_path,
+				d->replica_server_password,
+				d->replica_logical_db,
+				d->replica_connect_timeout,
+				d->replica_command_timeout);
+		} else {
+			ctx = redis_connect(
+				d->server_host,
+				d->server_port,
+				d->server_path,
+				d->server_password,
+				d->logical_db,
+				d->connect_timeout,
+				d->command_timeout);
+		}
+		ctx_selector[env->alloc->thread_num] = ctx;
 	}
-	if(!ctx)
-		return NULL;
+	if(!ctx) return NULL;

 	/* Send the command and get a reply, synchronously. */
 	rep = (redisReply*)redisCommand(ctx, command, data, data_len);
@@ -262,7 +387,7 @@ redis_command(struct module_env* env, struct cachedb_env* cachedb_env,
 		log_err("redis_command: failed to receive a reply, "
 			"closing connection: %s", ctx->errstr);
 		redisFree(ctx);
-		d->ctxs[env->alloc->thread_num] = NULL;
+		ctx_selector[env->alloc->thread_num] = NULL;
 		return NULL;
 	}

@@ -292,7 +417,7 @@ redis_lookup(struct module_env* env, struct cachedb_env* cachedb_env,
 		return 0;
 	}

-	rep = redis_command(env, cachedb_env, cmdbuf, NULL, 0);
+	rep = redis_command(env, cachedb_env, cmdbuf, NULL, 0, 0);
 	if(!rep)
 		return 0;
 	switch(rep->type) {
@@ -329,11 +454,16 @@ redis_store(struct module_env* env, struct cachedb_env* cachedb_env,
 {
 	redisReply* rep;
 	int n;
-	int set_ttl = (env->cfg->redis_expire_records &&
+	struct redis_moddata* moddata = (struct redis_moddata*)
+		cachedb_env->backend_data;
+	int set_ttl = (moddata->set_with_ex_available &&
+		env->cfg->redis_expire_records &&
 		(!env->cfg->serve_expired || env->cfg->serve_expired_ttl > 0));
 	/* Supported commands:
 	 * - "SET " + key + " %b"
-	 * - "SETEX " + key + " " + ttl + " %b"
+	 * - "SET " + key + " %b EX " + ttl
+	 *   older redis 2.0.0 was "SETEX " + key + " " + ttl + " %b"
+	 * - "EXPIRE " + key + " 0"
 	 */
 	char cmdbuf[6+(CACHEDB_HASHSIZE/8)*2+11+3+1];

@@ -341,14 +471,22 @@ redis_store(struct module_env* env, struct cachedb_env* cachedb_env,
 		verbose(VERB_ALGO, "redis_store %s (%d bytes)", key, (int)data_len);
 		/* build command to set to a binary safe string */
 		n = snprintf(cmdbuf, sizeof(cmdbuf), "SET %s %%b", key);
+	} else if(ttl == 0) {
+		/* use the EXPIRE command, SET with EX 0 is an invalid time. */
+		/* Replies with REDIS_REPLY_INTEGER of 1. */
+		verbose(VERB_ALGO, "redis_store expire %s (%d bytes)",
+			key, (int)data_len);
+		n = snprintf(cmdbuf, sizeof(cmdbuf), "EXPIRE %s 0", key);
+		data = NULL;
+		data_len = 0;
 	} else {
 		/* add expired ttl time to redis ttl to avoid premature eviction of key */
 		ttl += env->cfg->serve_expired_ttl;
 		verbose(VERB_ALGO, "redis_store %s (%d bytes) with ttl %u",
-			key, (int)data_len, (uint32_t)ttl);
+			key, (int)data_len, (unsigned)(uint32_t)ttl);
 		/* build command to set to a binary safe string */
-		n = snprintf(cmdbuf, sizeof(cmdbuf), "SETEX %s %u %%b", key,
-			(uint32_t)ttl);
+		n = snprintf(cmdbuf, sizeof(cmdbuf), "SET %s %%b EX %u", key,
+			(unsigned)(uint32_t)ttl);
 	}


@@ -357,11 +495,12 @@ redis_store(struct module_env* env, struct cachedb_env* cachedb_env,
 		return;
 	}

-	rep = redis_command(env, cachedb_env, cmdbuf, data, data_len);
+	rep = redis_command(env, cachedb_env, cmdbuf, data, data_len, 1);
 	if(rep) {
 		verbose(VERB_ALGO, "redis_store set completed");
 		if(rep->type != REDIS_REPLY_STATUS &&
-			rep->type != REDIS_REPLY_ERROR) {
+			rep->type != REDIS_REPLY_ERROR &&
+			rep->type != REDIS_REPLY_INTEGER) {
 			log_err("redis_store: unexpected type of reply (%d)",
 				rep->type);
 		}
@@ -5,12 +5,8 @@
 #undef malloc
 #include <sys/types.h>

-#ifndef USE_WINSOCK
-void *malloc ();
-#else
 /* provide a prototype */
 void *malloc (size_t n);
-#endif

 /* Allocate an N-byte block of memory from the heap.
   If N is zero, allocate a 1-byte block.  */
@@ -1,5 +1,8 @@
 /* config.h.in.  Generated from configure.ac by autoheader.  */

+/* apply the fallthrough attribute. */
+#undef ATTR_FALLTHROUGH
+
 /* apply the noreturn attribute to a function that exits the program */
 #undef ATTR_NORETURN

@@ -57,6 +60,9 @@
 /* Define to 1 if you have the <arpa/inet.h> header file. */
 #undef HAVE_ARPA_INET_H

+/* Whether the C compiler accepts the "fallthrough" attribute */
+#undef HAVE_ATTR_FALLTHROUGH
+
 /* Whether the C compiler accepts the "format" attribute */
 #undef HAVE_ATTR_FORMAT

@@ -123,6 +129,14 @@
   and to 0 if you don't. */
 #undef HAVE_DECL_NGHTTP2_SESSION_SERVER_NEW

+/* Define to 1 if you have the declaration of `ngtcp2_conn_server_new', and to
+   0 if you don't. */
+#undef HAVE_DECL_NGTCP2_CONN_SERVER_NEW
+
+/* Define to 1 if you have the declaration of `ngtcp2_crypto_encrypt_cb', and
+   to 0 if you don't. */
+#undef HAVE_DECL_NGTCP2_CRYPTO_ENCRYPT_CB
+
 /* Define to 1 if you have the declaration of `NID_ED25519', and to 0 if you
   don't. */
 #undef HAVE_DECL_NID_ED25519
@@ -364,6 +378,9 @@
 /* Define if we have LibreSSL */
 #undef HAVE_LIBRESSL

+/* If we have atomic_store */
+#undef HAVE_LINK_ATOMIC_STORE
+
 /* Define to 1 if you have the <linux/net_tstamp.h> header file. */
 #undef HAVE_LINUX_NET_TSTAMP_H

@@ -415,6 +432,65 @@
 /* Define to 1 if you have the <nghttp2/nghttp2.h> header file. */
 #undef HAVE_NGHTTP2_NGHTTP2_H

+/* Define this to use ngtcp2. */
+#undef HAVE_NGTCP2
+
+/* Define to 1 if you have the `ngtcp2_ccerr_default' function. */
+#undef HAVE_NGTCP2_CCERR_DEFAULT
+
+/* Define to 1 if you have the `ngtcp2_conn_encode_0rtt_transport_params'
+   function. */
+#undef HAVE_NGTCP2_CONN_ENCODE_0RTT_TRANSPORT_PARAMS
+
+/* Define to 1 if you have the `ngtcp2_conn_get_max_local_streams_uni'
+   function. */
+#undef HAVE_NGTCP2_CONN_GET_MAX_LOCAL_STREAMS_UNI
+
+/* Define to 1 if you have the `ngtcp2_conn_get_num_scid' function. */
+#undef HAVE_NGTCP2_CONN_GET_NUM_SCID
+
+/* Define to 1 if you have the `ngtcp2_conn_in_closing_period' function. */
+#undef HAVE_NGTCP2_CONN_IN_CLOSING_PERIOD
+
+/* Define to 1 if you have the `ngtcp2_conn_in_draining_period' function. */
+#undef HAVE_NGTCP2_CONN_IN_DRAINING_PERIOD
+
+/* Define if ngtcp2_conn_shutdown_stream has 4 arguments. */
+#undef HAVE_NGTCP2_CONN_SHUTDOWN_STREAM4
+
+/* Define to 1 if you have the `ngtcp2_conn_tls_early_data_rejected' function.
+   */
+#undef HAVE_NGTCP2_CONN_TLS_EARLY_DATA_REJECTED
+
+/* Define to 1 if you have the `ngtcp2_crypto_encrypt_cb' function. */
+#undef HAVE_NGTCP2_CRYPTO_ENCRYPT_CB
+
+/* Define to 1 if you have the
+   `ngtcp2_crypto_quictls_configure_client_context' function. */
+#undef HAVE_NGTCP2_CRYPTO_QUICTLS_CONFIGURE_CLIENT_CONTEXT
+
+/* Define to 1 if you have the
+   `ngtcp2_crypto_quictls_configure_server_context' function. */
+#undef HAVE_NGTCP2_CRYPTO_QUICTLS_CONFIGURE_SERVER_CONTEXT
+
+/* Define to 1 if you have the
+   `ngtcp2_crypto_quictls_from_ossl_encryption_level' function. */
+#undef HAVE_NGTCP2_CRYPTO_QUICTLS_FROM_OSSL_ENCRYPTION_LEVEL
+
+/* Define to 1 if the system has the type `ngtcp2_encryption_level'. */
+#undef HAVE_NGTCP2_ENCRYPTION_LEVEL
+
+/* Define to 1 if you have the <ngtcp2/ngtcp2_crypto_openssl.h> header file.
+   */
+#undef HAVE_NGTCP2_NGTCP2_CRYPTO_OPENSSL_H
+
+/* Define to 1 if you have the <ngtcp2/ngtcp2_crypto_quictls.h> header file.
+   */
+#undef HAVE_NGTCP2_NGTCP2_CRYPTO_QUICTLS_H
+
+/* Define to 1 if you have the <ngtcp2/ngtcp2.h> header file. */
+#undef HAVE_NGTCP2_NGTCP2_H
+
 /* Use libnss for crypto */
 #undef HAVE_NSS

@@ -581,12 +657,18 @@
 /* Define to 1 if you have the `SSL_get1_peer_certificate' function. */
 #undef HAVE_SSL_GET1_PEER_CERTIFICATE

+/* Define to 1 if you have the `SSL_is_quic' function. */
+#undef HAVE_SSL_IS_QUIC
+
 /* Define to 1 if you have the `SSL_set1_host' function. */
 #undef HAVE_SSL_SET1_HOST

 /* Define to 1 if you have the <stdarg.h> header file. */
 #undef HAVE_STDARG_H

+/* Define to 1 if you have the <stdatomic.h> header file. */
+#undef HAVE_STDATOMIC_H
+
 /* Define to 1 if you have the <stdbool.h> header file. */
 #undef HAVE_STDBOOL_H

@@ -623,6 +705,23 @@
 /* Define to 1 if `ipi_spec_dst' is a member of `struct in_pktinfo'. */
 #undef HAVE_STRUCT_IN_PKTINFO_IPI_SPEC_DST

+/* Define to 1 if `tokenlen' is a member of `struct ngtcp2_pkt_hd'. */
+#undef HAVE_STRUCT_NGTCP2_PKT_HD_TOKENLEN
+
+/* Define to 1 if `max_tx_udp_payload_size' is a member of `struct
+   ngtcp2_settings'. */
+#undef HAVE_STRUCT_NGTCP2_SETTINGS_MAX_TX_UDP_PAYLOAD_SIZE
+
+/* Define to 1 if `tokenlen' is a member of `struct ngtcp2_settings'. */
+#undef HAVE_STRUCT_NGTCP2_SETTINGS_TOKENLEN
+
+/* Define to 1 if `original_dcid_present' is a member of `struct
+   ngtcp2_transport_params'. */
+#undef HAVE_STRUCT_NGTCP2_TRANSPORT_PARAMS_ORIGINAL_DCID_PRESENT
+
+/* Define to 1 if the system has the type `struct ngtcp2_version_cid'. */
+#undef HAVE_STRUCT_NGTCP2_VERSION_CID
+
 /* Define to 1 if `sun_len' is a member of `struct sockaddr_un'. */
 #undef HAVE_STRUCT_SOCKADDR_UN_SUN_LEN

@@ -1490,6 +1589,10 @@ struct sockaddr_storage;
 #  define calloc(n,s) unbound_stat_calloc_log(n, s, __FILE__, __LINE__, __func__)
 #  define free(p) unbound_stat_free_log(p, __FILE__, __LINE__, __func__)
 #  define realloc(p,s) unbound_stat_realloc_log(p, s, __FILE__, __LINE__, __func__)
+#  define strdup(s) unbound_stat_strdup_log(s, __FILE__, __LINE__, __func__)
+#ifdef HAVE_REALLOCARRAY
+#  define reallocarray(p,n,s) unbound_stat_reallocarray_log(p, n, s, __FILE__, __LINE__, __func__)
+#endif
 void *unbound_stat_malloc(size_t size);
 void *unbound_stat_calloc(size_t nmemb, size_t size);
 void unbound_stat_free(void *ptr);
@@ -1502,6 +1605,10 @@ void unbound_stat_free_log(void *ptr, const char* file, int line,
 	const char* func);
 void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
 	int line, const char* func);
+void *unbound_stat_reallocarray_log(void *ptr, size_t nmemb, size_t size,
+	const char* file, int line, const char* func);
+char *unbound_stat_strdup_log(const char *s, const char* file, int line,
+	const char* func);
 #elif defined(UNBOUND_ALLOC_LITE)
 #  include "util/alloc.h"
 #endif /* UNBOUND_ALLOC_LITE and UNBOUND_ALLOC_STATS */
@@ -1512,6 +1619,8 @@ void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
 #define UNBOUND_DNS_OVER_TLS_PORT 853
 /** default port for DNS over HTTPS traffic. */
 #define UNBOUND_DNS_OVER_HTTPS_PORT 443
+/** default port for DNS over QUIC traffic. */
+#define UNBOUND_DNS_OVER_QUIC_PORT 853
 /** default port for unbound control traffic, registered port with IANA,
    ub-dns-control  8953/tcp    unbound dns nameserver control */
 #define UNBOUND_CONTROL_PORT 8953
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for unbound 1.20.1.
+# Generated by GNU Autoconf 2.71 for unbound 1.23.0.
 #
 # Report bugs to <unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues>.
 #
@@ -622,8 +622,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='unbound'
 PACKAGE_TARNAME='unbound'
-PACKAGE_VERSION='1.20.1'
-PACKAGE_STRING='unbound 1.20.1'
+PACKAGE_VERSION='1.23.0'
+PACKAGE_STRING='unbound 1.23.0'
 PACKAGE_BUGREPORT='unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues'
 PACKAGE_URL=''

@@ -712,6 +712,7 @@ SSLLIB
 HAVE_SSL
 PC_CRYPTO_DEPENDENCY
 CONFIG_DATE
+SOURCE_DATE_EPOCH
 GCC_DOCKER_LINTFLAGS
 NETBSD_LINTFLAGS
 PYUNBOUND_UNINSTALL
@@ -921,6 +922,7 @@ with_libevent
 with_libexpat
 with_libhiredis
 with_libnghttp2
+with_libngtcp2
 enable_static_exe
 enable_fully_static
 enable_lock_checks
@@ -958,6 +960,7 @@ SYSTEMD_LIBS
 SYSTEMD_DAEMON_CFLAGS
 SYSTEMD_DAEMON_LIBS
 PYTHON_VERSION
+SOURCE_DATE_EPOCH
 PROTOBUFC_CFLAGS
 PROTOBUFC_LIBS'

@@ -1508,7 +1511,7 @@ if test "$ac_init_help" = "long"; then
  # Omit some internal or obsolete options to make the list less imposing.
  # This message is too long to be a string in the A/UX 3.1 sh.
  cat <<_ACEOF
-\`configure' configures unbound 1.20.1 to adapt to many kinds of systems.
+\`configure' configures unbound 1.23.0 to adapt to many kinds of systems.

 Usage: $0 [OPTION]... [VAR=VALUE]...

@@ -1574,7 +1577,7 @@ fi

 if test -n "$ac_init_help"; then
  case $ac_init_help in
-     short | recursive ) echo "Configuration of unbound 1.20.1:";;
+     short | recursive ) echo "Configuration of unbound 1.23.0:";;
   esac
  cat <<\_ACEOF

@@ -1709,6 +1712,7 @@ Optional Packages:
  --with-libexpat=path    specify explicit path for libexpat.
  --with-libhiredis=path  specify explicit path for libhiredis.
  --with-libnghttp2=path  specify explicit path for libnghttp2.
+  --with-libngtcp2=path   specify explicit path for libngtcp2, for QUIC.
  --with-dnstap-socket-path=pathname
                          set default dnstap socket path
  --with-protobuf-c=path  Path where protobuf-c is installed, for dnstap
@@ -1750,6 +1754,10 @@ Some influential environment variables:
              The installed Python version to use, for example '2.3'. This
              string will be appended to the Python interpreter canonical
              name.
+  SOURCE_DATE_EPOCH
+              If it is set, it uses the value of that variable instead of the
+              current time as the build timestamp. The format is a unix
+              timestamp. This enables reproducible build output.
  PROTOBUFC_CFLAGS
              C compiler flags for PROTOBUFC, overriding pkg-config
  PROTOBUFC_LIBS
@@ -1822,7 +1830,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
  cat <<\_ACEOF
-unbound configure 1.20.1
+unbound configure 1.23.0
 generated by GNU Autoconf 2.71

 Copyright (C) 2021 Free Software Foundation, Inc.
@@ -2479,7 +2487,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.

-It was created by unbound $as_me 1.20.1, which was
+It was created by unbound $as_me 1.23.0, which was
 generated by GNU Autoconf 2.71.  Invocation command line was

  $ $0$ac_configure_args_raw
@@ -3241,13 +3249,13 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu

 UNBOUND_VERSION_MAJOR=1

-UNBOUND_VERSION_MINOR=20
+UNBOUND_VERSION_MINOR=23

-UNBOUND_VERSION_MICRO=1
+UNBOUND_VERSION_MICRO=0


 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=28
+LIBUNBOUND_REVISION=31
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -3342,7 +3350,10 @@ LIBUNBOUND_AGE=1
 # 1.19.2 had 9:25:1
 # 1.19.3 had 9:26:1
 # 1.20.0 had 9:27:1
-# 1.20.1 had 9:28:1
+# 1.21.0 had 9:28:1
+# 1.21.1 had 9:29:1
+# 1.22.0 had 9:30:1
+# 1.23.0 had 9:31:1

 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -6976,6 +6987,10 @@ printf "%s\n" "#define HAVE_ATTR_WEAK 1" >>confdefs.h

 printf "%s\n" "#define ATTR_WEAK __attribute__((weak))" >>confdefs.h

+else
+
+printf "%s\n" "#define ATTR_WEAK /**/" >>confdefs.h
+
 fi


@@ -7023,6 +7038,79 @@ printf "%s\n" "#define HAVE_ATTR_NORETURN 1" >>confdefs.h

 printf "%s\n" "#define ATTR_NORETURN __attribute__((__noreturn__))" >>confdefs.h

+else
+
+printf "%s\n" "#define ATTR_NORETURN /**/" >>confdefs.h
+
+fi
+
+
+
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the C compiler (${CC-cc}) accepts the \"fallthrough\" attribute" >&5
+printf %s "checking whether the C compiler (${CC-cc}) accepts the \"fallthrough\" attribute... " >&6; }
+BAKCFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Werror"
+if test ${ac_cv_c_fallthrough_attribute+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_cv_c_fallthrough_attribute=no
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+ #include <stdio.h>
+void f(int x) {
+	int y = 0;
+	switch(x) {
+	case 1:
+		y = 1;
+		__attribute__((fallthrough));
+		/* fallthrough */
+	case 2:
+		y++;
+		break;
+	case 3:
+		y = 3;
+		break;
+	}
+	printf("%d", y);
+}
+
+int
+main (void)
+{
+
+   f(1);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+  ac_cv_c_fallthrough_attribute="yes"
+else $as_nop
+  ac_cv_c_fallthrough_attribute="no"
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+
+CFLAGS="$BAKCFLAGS"
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_fallthrough_attribute" >&5
+printf "%s\n" "$ac_cv_c_fallthrough_attribute" >&6; }
+if test $ac_cv_c_fallthrough_attribute = yes; then
+
+printf "%s\n" "#define HAVE_ATTR_FALLTHROUGH 1" >>confdefs.h
+
+
+printf "%s\n" "#define ATTR_FALLTHROUGH __attribute__((fallthrough));" >>confdefs.h
+
+else
+
+printf "%s\n" "#define ATTR_FALLTHROUGH /**/" >>confdefs.h
+
 fi


@@ -16012,6 +16100,14 @@ then :

 fi

+ac_fn_c_check_header_compile "$LINENO" "stdatomic.h" "ac_cv_header_stdatomic_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_stdatomic_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_STDATOMIC_H 1" >>confdefs.h
+
+fi
+

 # check for types.
 # Using own tests for int64* because autoconf builtin only give 32bit.
@@ -19812,7 +19908,26 @@ if test "`uname`" = "Linux"; then
 	GCC_DOCKER_LINTFLAGS='-syntax'

 fi
-CONFIG_DATE=`date +%Y%m%d`
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for build time" >&5
+printf %s "checking for build time... " >&6; }
+ax_date_fmt="%Y%m%d"
+if test x"$SOURCE_DATE_EPOCH" = x
+then :
+  CONFIG_DATE=`date "+$ax_date_fmt"`
+else $as_nop
+  ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+                 || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+  if test x"$ax_build_date" = x
+then :
+  as_fn_error $? "malformed SOURCE_DATE_EPOCH" "$LINENO" 5
+else $as_nop
+  CONFIG_DATE=$ax_build_date
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $CONFIG_DATE" >&5
+printf "%s\n" "$CONFIG_DATE" >&6; }
+
+


 # Checks for libraries.
@@ -22126,6 +22241,353 @@ printf "%s\n" "#define HAVE_DECL_NGHTTP2_SESSION_SERVER_NEW $ac_have_decl" >>con

 fi

+# ngtcp2
+
+# Check whether --with-libngtcp2 was given.
+if test ${with_libngtcp2+y}
+then :
+  withval=$with_libngtcp2;
+else $as_nop
+   withval="no"
+fi
+
+found_libngtcp2="no"
+if test x_$withval = x_yes -o x_$withval != x_no; then
+   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for libngtcp2" >&5
+printf %s "checking for libngtcp2... " >&6; }
+   if test x_$withval = x_ -o x_$withval = x_yes; then
+            withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
+   fi
+   for dir in $withval ; do
+            if test -f "$dir/include/ngtcp2/ngtcp2.h"; then
+		found_libngtcp2="yes"
+				if test "$dir" != "/usr"; then
+                    CPPFLAGS="$CPPFLAGS -I$dir/include"
+		    LDFLAGS="$LDFLAGS -L$dir/lib"
+		fi
+		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: found in $dir" >&5
+printf "%s\n" "found in $dir" >&6; }
+
+printf "%s\n" "#define HAVE_NGTCP2 1" >>confdefs.h
+
+		LIBS="$LIBS -lngtcp2"
+                break;
+            fi
+    done
+    if test x_$found_libngtcp2 != x_yes; then
+	as_fn_error $? "Could not find libngtcp2, ngtcp2.h" "$LINENO" 5
+    fi
+    ac_fn_c_check_header_compile "$LINENO" "ngtcp2/ngtcp2.h" "ac_cv_header_ngtcp2_ngtcp2_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_ngtcp2_ngtcp2_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_NGTCP2_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "ngtcp2/ngtcp2_crypto_openssl.h" "ac_cv_header_ngtcp2_ngtcp2_crypto_openssl_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_ngtcp2_ngtcp2_crypto_openssl_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_NGTCP2_CRYPTO_OPENSSL_H 1" >>confdefs.h
+
+fi
+ac_fn_c_check_header_compile "$LINENO" "ngtcp2/ngtcp2_crypto_quictls.h" "ac_cv_header_ngtcp2_ngtcp2_crypto_quictls_h" "$ac_includes_default
+"
+if test "x$ac_cv_header_ngtcp2_ngtcp2_crypto_quictls_h" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_NGTCP2_CRYPTO_QUICTLS_H 1" >>confdefs.h
+
+fi
+
+    ac_fn_check_decl "$LINENO" "ngtcp2_conn_server_new" "ac_cv_have_decl_ngtcp2_conn_server_new" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_ngtcp2_conn_server_new" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_NGTCP2_CONN_SERVER_NEW $ac_have_decl" >>confdefs.h
+
+    ac_fn_check_decl "$LINENO" "ngtcp2_crypto_encrypt_cb" "ac_cv_have_decl_ngtcp2_crypto_encrypt_cb" "$ac_includes_default
+    #include <ngtcp2/ngtcp2_crypto.h>
+
+" "$ac_c_undeclared_builtin_options" "CFLAGS"
+if test "x$ac_cv_have_decl_ngtcp2_crypto_encrypt_cb" = xyes
+then :
+  ac_have_decl=1
+else $as_nop
+  ac_have_decl=0
+fi
+printf "%s\n" "#define HAVE_DECL_NGTCP2_CRYPTO_ENCRYPT_CB $ac_have_decl" >>confdefs.h
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ngtcp2_crypto_encrypt_cb in -lngtcp2_crypto_openssl" >&5
+printf %s "checking for ngtcp2_crypto_encrypt_cb in -lngtcp2_crypto_openssl... " >&6; }
+if test ${ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lngtcp2_crypto_openssl  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char ngtcp2_crypto_encrypt_cb ();
+int
+main (void)
+{
+return ngtcp2_crypto_encrypt_cb ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb=yes
+else $as_nop
+  ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb" >&5
+printf "%s\n" "$ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb" >&6; }
+if test "x$ac_cv_lib_ngtcp2_crypto_openssl_ngtcp2_crypto_encrypt_cb" = xyes
+then :
+   LIBS="$LIBS -lngtcp2_crypto_openssl"
+fi
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for ngtcp2_crypto_encrypt_cb in -lngtcp2_crypto_quictls" >&5
+printf %s "checking for ngtcp2_crypto_encrypt_cb in -lngtcp2_crypto_quictls... " >&6; }
+if test ${ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb+y}
+then :
+  printf %s "(cached) " >&6
+else $as_nop
+  ac_check_lib_save_LIBS=$LIBS
+LIBS="-lngtcp2_crypto_quictls  $LIBS"
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+char ngtcp2_crypto_encrypt_cb ();
+int
+main (void)
+{
+return ngtcp2_crypto_encrypt_cb ();
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+  ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb=yes
+else $as_nop
+  ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+LIBS=$ac_check_lib_save_LIBS
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb" >&5
+printf "%s\n" "$ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb" >&6; }
+if test "x$ac_cv_lib_ngtcp2_crypto_quictls_ngtcp2_crypto_encrypt_cb" = xyes
+then :
+   LIBS="$LIBS -lngtcp2_crypto_quictls"
+fi
+
+    ac_fn_c_check_func "$LINENO" "ngtcp2_crypto_encrypt_cb" "ac_cv_func_ngtcp2_crypto_encrypt_cb"
+if test "x$ac_cv_func_ngtcp2_crypto_encrypt_cb" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CRYPTO_ENCRYPT_CB 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_ccerr_default" "ac_cv_func_ngtcp2_ccerr_default"
+if test "x$ac_cv_func_ngtcp2_ccerr_default" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CCERR_DEFAULT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_in_closing_period" "ac_cv_func_ngtcp2_conn_in_closing_period"
+if test "x$ac_cv_func_ngtcp2_conn_in_closing_period" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_IN_CLOSING_PERIOD 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_in_draining_period" "ac_cv_func_ngtcp2_conn_in_draining_period"
+if test "x$ac_cv_func_ngtcp2_conn_in_draining_period" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_IN_DRAINING_PERIOD 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_get_max_local_streams_uni" "ac_cv_func_ngtcp2_conn_get_max_local_streams_uni"
+if test "x$ac_cv_func_ngtcp2_conn_get_max_local_streams_uni" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_GET_MAX_LOCAL_STREAMS_UNI 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_crypto_quictls_from_ossl_encryption_level" "ac_cv_func_ngtcp2_crypto_quictls_from_ossl_encryption_level"
+if test "x$ac_cv_func_ngtcp2_crypto_quictls_from_ossl_encryption_level" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CRYPTO_QUICTLS_FROM_OSSL_ENCRYPTION_LEVEL 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_crypto_quictls_configure_server_context" "ac_cv_func_ngtcp2_crypto_quictls_configure_server_context"
+if test "x$ac_cv_func_ngtcp2_crypto_quictls_configure_server_context" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CRYPTO_QUICTLS_CONFIGURE_SERVER_CONTEXT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_crypto_quictls_configure_client_context" "ac_cv_func_ngtcp2_crypto_quictls_configure_client_context"
+if test "x$ac_cv_func_ngtcp2_crypto_quictls_configure_client_context" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CRYPTO_QUICTLS_CONFIGURE_CLIENT_CONTEXT 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_get_num_scid" "ac_cv_func_ngtcp2_conn_get_num_scid"
+if test "x$ac_cv_func_ngtcp2_conn_get_num_scid" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_GET_NUM_SCID 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_tls_early_data_rejected" "ac_cv_func_ngtcp2_conn_tls_early_data_rejected"
+if test "x$ac_cv_func_ngtcp2_conn_tls_early_data_rejected" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_TLS_EARLY_DATA_REJECTED 1" >>confdefs.h
+
+fi
+ac_fn_c_check_func "$LINENO" "ngtcp2_conn_encode_0rtt_transport_params" "ac_cv_func_ngtcp2_conn_encode_0rtt_transport_params"
+if test "x$ac_cv_func_ngtcp2_conn_encode_0rtt_transport_params" = xyes
+then :
+  printf "%s\n" "#define HAVE_NGTCP2_CONN_ENCODE_0RTT_TRANSPORT_PARAMS 1" >>confdefs.h
+
+fi
+
+
+  for ac_func in SSL_is_quic
+do :
+  ac_fn_c_check_func "$LINENO" "SSL_is_quic" "ac_cv_func_SSL_is_quic"
+if test "x$ac_cv_func_SSL_is_quic" = xyes
+then :
+  printf "%s\n" "#define HAVE_SSL_IS_QUIC 1" >>confdefs.h
+
+else $as_nop
+  as_fn_error $? "No QUIC support detected in OpenSSL. Need OpenSSL version with QUIC support to enable DNS over QUIC with libngtcp2." "$LINENO" 5
+fi
+
+done
+    ac_fn_c_check_type "$LINENO" "struct ngtcp2_version_cid" "ac_cv_type_struct_ngtcp2_version_cid" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_type_struct_ngtcp2_version_cid" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_NGTCP2_VERSION_CID 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_type "$LINENO" "ngtcp2_encryption_level" "ac_cv_type_ngtcp2_encryption_level" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_type_ngtcp2_encryption_level" = xyes
+then :
+
+printf "%s\n" "#define HAVE_NGTCP2_ENCRYPTION_LEVEL 1" >>confdefs.h
+
+
+fi
+
+    ac_fn_c_check_member "$LINENO" "struct ngtcp2_pkt_hd" "tokenlen" "ac_cv_member_struct_ngtcp2_pkt_hd_tokenlen" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_member_struct_ngtcp2_pkt_hd_tokenlen" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_NGTCP2_PKT_HD_TOKENLEN 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct ngtcp2_settings" "tokenlen" "ac_cv_member_struct_ngtcp2_settings_tokenlen" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_member_struct_ngtcp2_settings_tokenlen" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_NGTCP2_SETTINGS_TOKENLEN 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct ngtcp2_settings" "max_tx_udp_payload_size" "ac_cv_member_struct_ngtcp2_settings_max_tx_udp_payload_size" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_member_struct_ngtcp2_settings_max_tx_udp_payload_size" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_NGTCP2_SETTINGS_MAX_TX_UDP_PAYLOAD_SIZE 1" >>confdefs.h
+
+
+fi
+ac_fn_c_check_member "$LINENO" "struct ngtcp2_transport_params" "original_dcid_present" "ac_cv_member_struct_ngtcp2_transport_params_original_dcid_present" "$ac_includes_default
+    #include <ngtcp2/ngtcp2.h>
+
+"
+if test "x$ac_cv_member_struct_ngtcp2_transport_params_original_dcid_present" = xyes
+then :
+
+printf "%s\n" "#define HAVE_STRUCT_NGTCP2_TRANSPORT_PARAMS_ORIGINAL_DCID_PRESENT 1" >>confdefs.h
+
+
+fi
+
+
+    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether ngtcp2_conn_shutdown_stream has 4 arguments" >&5
+printf %s "checking whether ngtcp2_conn_shutdown_stream has 4 arguments... " >&6; }
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+#include <ngtcp2/ngtcp2.h>
+
+int
+main (void)
+{
+
+	(void)ngtcp2_conn_shutdown_stream(NULL, 0, 0, 0);
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"
+then :
+
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+
+printf "%s\n" "#define HAVE_NGTCP2_CONN_SHUTDOWN_STREAM4 1" >>confdefs.h
+
+
+else $as_nop
+
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+
+fi
+
 # set static linking for uninstalled libraries if requested

 staticexe=""
@@ -23068,6 +23530,48 @@ if echo $host_os | grep darwin8 > /dev/null; then
 printf "%s\n" "#define DARWIN_BROKEN_SETREUID 1" >>confdefs.h

 fi
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for atomic_store" >&5
+printf %s "checking for atomic_store... " >&6; }
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+#ifdef HAVE_STDATOMIC_H
+#include <stdatomic.h>
+#endif
+
+int
+main (void)
+{
+
+	int newvar = 5, var = 0;
+	atomic_store((_Atomic int*)&var, newvar);
+	newvar = 0;
+	/* condition to use the variables. */
+	if(var == newvar) return 1;
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"
+then :
+
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; }
+
+printf "%s\n" "#define HAVE_LINK_ATOMIC_STORE 1" >>confdefs.h
+
+
+else $as_nop
+
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; }
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+
 ac_fn_check_decl "$LINENO" "inet_pton" "ac_cv_have_decl_inet_pton" "
 $ac_includes_default
 #ifdef HAVE_NETINET_IN_H
@@ -23709,10 +24213,12 @@ if test x_$enable_lock_checks = x_yes; then
 	UBSYMS="-export-symbols clubsyms.def"
 	cp ${srcdir}/libunbound/ubsyms.def clubsyms.def
 	echo lock_protect >> clubsyms.def
+	echo lock_protect_place >> clubsyms.def
 	echo lock_unprotect >> clubsyms.def
 	echo lock_get_mem >> clubsyms.def
 	echo checklock_start >> clubsyms.def
 	echo checklock_stop >> clubsyms.def
+	echo checklock_set_output_name >> clubsyms.def
 	echo checklock_lock >> clubsyms.def
 	echo checklock_unlock >> clubsyms.def
 	echo checklock_init >> clubsyms.def
@@ -24567,9 +25073,27 @@ printf "%s\n" "#define MAXSYSLOGMSGLEN 10240" >>confdefs.h



-version=1.20.1
+version=1.23.0
+
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for build time" >&5
+printf %s "checking for build time... " >&6; }
+ax_date_fmt="%b %e, %Y"
+if test x"$SOURCE_DATE_EPOCH" = x
+then :
+  date=`date "+$ax_date_fmt"`
+else $as_nop
+  ax_build_date=`date -u -d "@$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null \
+                 || date -u -r "$SOURCE_DATE_EPOCH" "+$ax_date_fmt" 2>/dev/null`
+  if test x"$ax_build_date" = x
+then :
+  as_fn_error $? "malformed SOURCE_DATE_EPOCH" "$LINENO" 5
+else $as_nop
+  date=$ax_build_date
+fi
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $date" >&5
+printf "%s\n" "$date" >&6; }

-date=`date +'%b %e, %Y'`


 ac_config_files="$ac_config_files Makefile doc/example.conf doc/libunbound.3 doc/unbound.8 doc/unbound-anchor.8 doc/unbound-checkconf.8 doc/unbound.conf.5 doc/unbound-control.8 doc/unbound-host.1 smallapp/unbound-control-setup.sh dnstap/dnstap_config.h dnscrypt/dnscrypt_config.h contrib/libunbound.pc contrib/unbound.socket contrib/unbound.service contrib/unbound_portable.service"
@@ -25079,7 +25603,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by unbound $as_me 1.20.1, which was
+This file was extended by unbound $as_me 1.23.0, which was
 generated by GNU Autoconf 2.71.  Invocation command line was

  CONFIG_FILES    = $CONFIG_FILES
@@ -25147,7 +25671,7 @@ ac_cs_config_escaped=`printf "%s\n" "$ac_cs_config" | sed "s/^ //; s/'/'\\\\\\\\
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
-unbound config.status 1.20.1
+unbound config.status 1.23.0
 configured by $0, generated by GNU Autoconf 2.71,
  with options \\"\$ac_cs_config\\"

@@ -2,6 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 AC_PREREQ([2.56])
 sinclude(acx_nlnetlabs.m4)
+sinclude(ax_build_date_epoch.m4)
 sinclude(ax_pthread.m4)
 sinclude(acx_python.m4)
 sinclude(ax_pkg_swig.m4)
@@ -10,15 +11,15 @@ sinclude(dnscrypt/dnscrypt.m4)

 # must be numbers. ac_defun because of later processing
 m4_define([VERSION_MAJOR],[1])
-m4_define([VERSION_MINOR],[20])
-m4_define([VERSION_MICRO],[1])
+m4_define([VERSION_MINOR],[23])
+m4_define([VERSION_MICRO],[0])
 AC_INIT([unbound],m4_defn([VERSION_MAJOR]).m4_defn([VERSION_MINOR]).m4_defn([VERSION_MICRO]),[unbound-bugs@nlnetlabs.nl or https://github.com/NLnetLabs/unbound/issues],[unbound])
 AC_SUBST(UNBOUND_VERSION_MAJOR, [VERSION_MAJOR])
 AC_SUBST(UNBOUND_VERSION_MINOR, [VERSION_MINOR])
 AC_SUBST(UNBOUND_VERSION_MICRO, [VERSION_MICRO])

 LIBUNBOUND_CURRENT=9
-LIBUNBOUND_REVISION=28
+LIBUNBOUND_REVISION=31
 LIBUNBOUND_AGE=1
 # 1.0.0 had 0:12:0
 # 1.0.1 had 0:13:0
@@ -113,7 +114,10 @@ LIBUNBOUND_AGE=1
 # 1.19.2 had 9:25:1
 # 1.19.3 had 9:26:1
 # 1.20.0 had 9:27:1
-# 1.20.1 had 9:28:1
+# 1.21.0 had 9:28:1
+# 1.21.1 had 9:29:1
+# 1.22.0 had 9:30:1
+# 1.23.0 had 9:31:1

 #   Current  -- the number of the binary API that we're implementing
 #   Revision -- which iteration of the implementation of the binary
@@ -339,6 +343,8 @@ AC_MSG_RESULT($ac_cv_c_weak_attribute)
 if test $ac_cv_c_weak_attribute = yes; then
  AC_DEFINE(HAVE_ATTR_WEAK, 1, [Whether the C compiler accepts the "weak" attribute])
  AC_DEFINE(ATTR_WEAK, [__attribute__((weak))], [apply the weak attribute to a symbol])
+else
+  AC_DEFINE(ATTR_WEAK,[], [apply the weak attribute to a symbol])
 fi
 ])dnl End of CHECK_WEAK_ATTRIBUTE

@@ -360,11 +366,54 @@ AC_MSG_RESULT($ac_cv_c_noreturn_attribute)
 if test $ac_cv_c_noreturn_attribute = yes; then
  AC_DEFINE(HAVE_ATTR_NORETURN, 1, [Whether the C compiler accepts the "noreturn" attribute])
  AC_DEFINE(ATTR_NORETURN, [__attribute__((__noreturn__))], [apply the noreturn attribute to a function that exits the program])
+else
+  AC_DEFINE(ATTR_NORETURN,[], [apply the noreturn attribute to a function that exits the program])
 fi
 ])dnl End of CHECK_NORETURN_ATTRIBUTE

 CHECK_NORETURN_ATTRIBUTE

+AC_DEFUN([CHECK_FALLTHROUGH_ATTRIBUTE],
+[AC_REQUIRE([AC_PROG_CC])
+AC_MSG_CHECKING(whether the C compiler (${CC-cc}) accepts the "fallthrough" attribute)
+BAKCFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Werror"
+AC_CACHE_VAL(ac_cv_c_fallthrough_attribute,
+[ac_cv_c_fallthrough_attribute=no
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h>
+void f(int x) {
+	int y = 0;
+	switch(x) {
+	case 1:
+		y = 1;
+		__attribute__((fallthrough));
+		/* fallthrough */
+	case 2:
+		y++;
+		break;
+	case 3:
+		y = 3;
+		break;
+	}
+	printf("%d", y);
+}
+]], [[
+   f(1);
+]])],[ac_cv_c_fallthrough_attribute="yes"],[ac_cv_c_fallthrough_attribute="no"])
+])
+CFLAGS="$BAKCFLAGS"
+
+AC_MSG_RESULT($ac_cv_c_fallthrough_attribute)
+if test $ac_cv_c_fallthrough_attribute = yes; then
+  AC_DEFINE(HAVE_ATTR_FALLTHROUGH, 1, [Whether the C compiler accepts the "fallthrough" attribute])
+  AC_DEFINE(ATTR_FALLTHROUGH, [__attribute__((fallthrough));], [apply the fallthrough attribute.])
+else
+  AC_DEFINE(ATTR_FALLTHROUGH,[], [apply the fallthrough attribute.])
+fi
+])dnl End of CHECK_FALLTHROUGH_ATTRIBUTE
+
+CHECK_FALLTHROUGH_ATTRIBUTE
+
 if test "$srcdir" != "."; then
 	CPPFLAGS="$CPPFLAGS -I$srcdir"
 fi
@@ -475,6 +524,7 @@ AC_CHECK_HEADERS([netioapi.h],,, [AC_INCLUDES_DEFAULT

 # Check for Linux timestamping headers
 AC_CHECK_HEADERS([linux/net_tstamp.h],,, [AC_INCLUDES_DEFAULT])
+AC_CHECK_HEADERS([stdatomic.h],,, [AC_INCLUDES_DEFAULT])

 # check for types.  
 # Using own tests for int64* because autoconf builtin only give 32bit.
@@ -860,7 +910,8 @@ if test "`uname`" = "Linux"; then
 	GCC_DOCKER_LINTFLAGS='-syntax'
 	AC_SUBST(GCC_DOCKER_LINTFLAGS)
 fi
-CONFIG_DATE=`date +%Y%m%d`
+AX_BUILD_DATE_EPOCH(CONFIG_DATE, [%Y%m%d])
+AC_ARG_VAR(SOURCE_DATE_EPOCH, [If it is set, it uses the value of that variable instead of the current time as the build timestamp. The format is a unix timestamp. This enables reproducible build output.])
 AC_SUBST(CONFIG_DATE)

 # Checks for libraries.
@@ -1532,6 +1583,64 @@ if test x_$withval = x_yes -o x_$withval != x_no; then
    ])
 fi

+# ngtcp2
+AC_ARG_WITH(libngtcp2, AS_HELP_STRING([--with-libngtcp2=path],[specify explicit path for libngtcp2, for QUIC.]),
+    [ ],[ withval="no" ])
+found_libngtcp2="no"
+if test x_$withval = x_yes -o x_$withval != x_no; then
+   AC_MSG_CHECKING(for libngtcp2)
+   if test x_$withval = x_ -o x_$withval = x_yes; then
+            withval="/usr/local /opt/local /usr/lib /usr/pkg /usr/sfw /usr"
+   fi
+   for dir in $withval ; do
+            if test -f "$dir/include/ngtcp2/ngtcp2.h"; then
+		found_libngtcp2="yes"
+		dnl assume /usr is in default path.
+		if test "$dir" != "/usr"; then
+                    CPPFLAGS="$CPPFLAGS -I$dir/include"
+		    LDFLAGS="$LDFLAGS -L$dir/lib"
+		fi
+		AC_MSG_RESULT(found in $dir)
+		AC_DEFINE([HAVE_NGTCP2], [1], [Define this to use ngtcp2.])
+		LIBS="$LIBS -lngtcp2"
+                break;
+            fi
+    done
+    if test x_$found_libngtcp2 != x_yes; then
+	AC_MSG_ERROR([Could not find libngtcp2, ngtcp2.h])
+    fi
+    AC_CHECK_HEADERS([ngtcp2/ngtcp2.h ngtcp2/ngtcp2_crypto_openssl.h ngtcp2/ngtcp2_crypto_quictls.h],,, [AC_INCLUDES_DEFAULT])
+    AC_CHECK_DECLS([ngtcp2_conn_server_new], [], [], [AC_INCLUDES_DEFAULT
+    #include <ngtcp2/ngtcp2.h>
+    ])
+    AC_CHECK_DECLS([ngtcp2_crypto_encrypt_cb], [], [], [AC_INCLUDES_DEFAULT
+    #include <ngtcp2/ngtcp2_crypto.h>
+    ])
+    AC_CHECK_LIB([ngtcp2_crypto_openssl], [ngtcp2_crypto_encrypt_cb], [ LIBS="$LIBS -lngtcp2_crypto_openssl" ])
+    AC_CHECK_LIB([ngtcp2_crypto_quictls], [ngtcp2_crypto_encrypt_cb], [ LIBS="$LIBS -lngtcp2_crypto_quictls" ])
+    AC_CHECK_FUNCS([ngtcp2_crypto_encrypt_cb ngtcp2_ccerr_default ngtcp2_conn_in_closing_period ngtcp2_conn_in_draining_period ngtcp2_conn_get_max_local_streams_uni ngtcp2_crypto_quictls_from_ossl_encryption_level ngtcp2_crypto_quictls_configure_server_context ngtcp2_crypto_quictls_configure_client_context ngtcp2_conn_get_num_scid ngtcp2_conn_tls_early_data_rejected ngtcp2_conn_encode_0rtt_transport_params])
+    AC_CHECK_FUNCS([SSL_is_quic], [], [AC_MSG_ERROR([No QUIC support detected in OpenSSL. Need OpenSSL version with QUIC support to enable DNS over QUIC with libngtcp2.])])
+    AC_CHECK_TYPES([struct ngtcp2_version_cid, ngtcp2_encryption_level],,,[AC_INCLUDES_DEFAULT
+    #include <ngtcp2/ngtcp2.h>
+    ])
+    AC_CHECK_MEMBERS([struct ngtcp2_pkt_hd.tokenlen, struct ngtcp2_settings.tokenlen, struct ngtcp2_settings.max_tx_udp_payload_size, struct ngtcp2_transport_params.original_dcid_present],,,[AC_INCLUDES_DEFAULT
+    #include <ngtcp2/ngtcp2.h>
+    ])
+
+    AC_MSG_CHECKING([whether ngtcp2_conn_shutdown_stream has 4 arguments])
+    AC_COMPILE_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT
+#include <ngtcp2/ngtcp2.h>
+    ],[
+	(void)ngtcp2_conn_shutdown_stream(NULL, 0, 0, 0);
+    ])],[
+	AC_MSG_RESULT(yes)
+	AC_DEFINE(HAVE_NGTCP2_CONN_SHUTDOWN_STREAM4, 1, [Define if ngtcp2_conn_shutdown_stream has 4 arguments.])
+    ],[
+	AC_MSG_RESULT(no)
+    ])
+
+fi
+
 # set static linking for uninstalled libraries if requested
 AC_SUBST(staticexe)
 staticexe=""
@@ -1709,6 +1818,25 @@ AC_CHECK_FUNCS([setresgid],,[AC_CHECK_FUNCS([setregid])])
 if echo $host_os | grep darwin8 > /dev/null; then
 	AC_DEFINE(DARWIN_BROKEN_SETREUID, 1, [Define this if on macOSX10.4-darwin8 and setreuid and setregid do not work])
 fi
+
+AC_MSG_CHECKING([for atomic_store])
+AC_LINK_IFELSE([AC_LANG_PROGRAM(AC_INCLUDES_DEFAULT [[
+#ifdef HAVE_STDATOMIC_H
+#include <stdatomic.h>
+#endif
+]], [[
+	int newvar = 5, var = 0;
+	atomic_store((_Atomic int*)&var, newvar);
+	newvar = 0;
+	/* condition to use the variables. */
+	if(var == newvar) return 1;
+]])], [
+	AC_MSG_RESULT(yes)
+	AC_DEFINE(HAVE_LINK_ATOMIC_STORE, 1, [If we have atomic_store])
+], [
+	AC_MSG_RESULT([no])
+])
+
 AC_CHECK_DECLS([inet_pton,inet_ntop], [], [], [
 AC_INCLUDES_DEFAULT
 #ifdef HAVE_NETINET_IN_H
@@ -1847,10 +1975,12 @@ if test x_$enable_lock_checks = x_yes; then
 	UBSYMS="-export-symbols clubsyms.def"
 	cp ${srcdir}/libunbound/ubsyms.def clubsyms.def
 	echo lock_protect >> clubsyms.def
+	echo lock_protect_place >> clubsyms.def
 	echo lock_unprotect >> clubsyms.def
 	echo lock_get_mem >> clubsyms.def
 	echo checklock_start >> clubsyms.def
 	echo checklock_stop >> clubsyms.def
+	echo checklock_set_output_name >> clubsyms.def
 	echo checklock_lock >> clubsyms.def
 	echo checklock_unlock >> clubsyms.def
 	echo checklock_init >> clubsyms.def
@@ -2284,6 +2414,10 @@ struct sockaddr_storage;
 #  define calloc(n,s) unbound_stat_calloc_log(n, s, __FILE__, __LINE__, __func__)
 #  define free(p) unbound_stat_free_log(p, __FILE__, __LINE__, __func__)
 #  define realloc(p,s) unbound_stat_realloc_log(p, s, __FILE__, __LINE__, __func__)
+#  define strdup(s) unbound_stat_strdup_log(s, __FILE__, __LINE__, __func__)
+#ifdef HAVE_REALLOCARRAY
+#  define reallocarray(p,n,s) unbound_stat_reallocarray_log(p, n, s, __FILE__, __LINE__, __func__)
+#endif
 void *unbound_stat_malloc(size_t size);
 void *unbound_stat_calloc(size_t nmemb, size_t size);
 void unbound_stat_free(void *ptr);
@@ -2296,6 +2430,10 @@ void unbound_stat_free_log(void *ptr, const char* file, int line,
 	const char* func);
 void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
 	int line, const char* func);
+void *unbound_stat_reallocarray_log(void *ptr, size_t nmemb, size_t size,
+	const char* file, int line, const char* func);
+char *unbound_stat_strdup_log(const char *s, const char* file, int line,
+	const char* func);
 #elif defined(UNBOUND_ALLOC_LITE)
 #  include "util/alloc.h"
 #endif /* UNBOUND_ALLOC_LITE and UNBOUND_ALLOC_STATS */
@@ -2306,6 +2444,8 @@ void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
 #define UNBOUND_DNS_OVER_TLS_PORT 853
 /** default port for DNS over HTTPS traffic. */
 #define UNBOUND_DNS_OVER_HTTPS_PORT 443
+/** default port for DNS over QUIC traffic. */
+#define UNBOUND_DNS_OVER_QUIC_PORT 853
 /** default port for unbound control traffic, registered port with IANA,
    ub-dns-control  8953/tcp    unbound dns nameserver control */
 #define UNBOUND_CONTROL_PORT 8953
@@ -2317,7 +2457,8 @@ void *unbound_stat_realloc_log(void *ptr, size_t size, const char* file,
 dnl if we build from source tree, the man pages need @date@ and @version@
 dnl if this is a distro tarball, that was already done by makedist.sh
 AC_SUBST(version, [VERSION_MAJOR.VERSION_MINOR.VERSION_MICRO])
-AC_SUBST(date, [`date +'%b %e, %Y'`])
+AX_BUILD_DATE_EPOCH(date, [[%b %e, %Y]])
+AC_SUBST(date)

 AC_CONFIG_FILES([Makefile doc/example.conf doc/libunbound.3 doc/unbound.8 doc/unbound-anchor.8 doc/unbound-checkconf.8 doc/unbound.conf.5 doc/unbound-control.8 doc/unbound-host.1 smallapp/unbound-control-setup.sh dnstap/dnstap_config.h dnscrypt/dnscrypt_config.h contrib/libunbound.pc contrib/unbound.socket contrib/unbound.service contrib/unbound_portable.service])
 AC_CONFIG_HEADERS([config.h])
@@ -236,7 +236,7 @@ index 54006940..768fe202 100644
 +		/* see if the failure did get (parent-lame) info */
 +		if(!cache_fill_missing(super->env,
 +			super_iq->qchase.qclass, super->region,
-+			super_iq->dp))
+			super_iq->dp, 0))
 +		log_err("ASN-AAAA-filter: out of memory adding missing");
 +		dpns->resolved = 1; /* mark as failed */
 +	}
@@ -1,21 +1,24 @@
 #!/usr/bin/env bash

+LIBEXPAT_FNAME=expat-2.7.0
+LIBEXPAT_VERSION_DIR=R_2_7_0
+
 echo "Downloading Expat"
-if ! curl -L -k -s -o expat-2.2.9.tar.gz https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-2.2.9.tar.gz;
+if ! curl -L -k -s -o $LIBEXPAT_FNAME.tar.gz https://github.com/libexpat/libexpat/releases/download/$LIBEXPAT_VERSION_DIR/$LIBEXPAT_FNAME.tar.gz;
 then
    echo "Failed to download Expat"
    exit 1
 fi

 echo "Unpacking Expat"
-rm -rf ./expat-2.2.9
-if ! tar -xf expat-2.2.9.tar.gz;
+rm -rf ./$LIBEXPAT_FNAME
+if ! tar -xf $LIBEXPAT_FNAME.tar.gz;
 then
    echo "Failed to unpack Expat"
    exit 1
 fi

-cd expat-2.2.9 || exit 1
+cd $LIBEXPAT_FNAME || exit 1

 echo "Configuring Expat"
 if ! ./configure --build="$AUTOTOOLS_BUILD" --host="$AUTOTOOLS_HOST" --prefix="$ANDROID_PREFIX"; then
@@ -1,28 +1,32 @@
 #!/usr/bin/env bash

+LIBEXPAT_FNAME=expat-2.7.0
+LIBEXPAT_VERSION_DIR=R_2_7_0
+
 echo "Downloading Expat"
-if ! curl -L -k -s -o expat-2.2.9.tar.gz https://github.com/libexpat/libexpat/releases/download/R_2_2_9/expat-2.2.9.tar.gz;
+if ! curl -L -k -s -o $LIBEXPAT_FNAME.tar.gz https://github.com/libexpat/libexpat/releases/download/$LIBEXPAT_VERSION_DIR/$LIBEXPAT_FNAME.tar.gz;
 then
    echo "Failed to download Expat"
    exit 1
 fi

 echo "Unpacking Expat"
-rm -rf ./expat-2.2.9
-if ! tar -xf expat-2.2.9.tar.gz;
+rm -rf ./$LIBEXPAT_FNAME
+if ! tar -xf $LIBEXPAT_FNAME.tar.gz;
 then
    echo "Failed to unpack Expat"
    exit 1
 fi

-cd expat-2.2.9 || exit 1
+cd $LIBEXPAT_FNAME || exit 1

 export PKG_CONFIG_PATH="$IOS_PREFIX/lib/pkgconfig"

 echo "Configuring Expat"
-if ! ./configure \
-       --build="$AUTOTOOLS_BUILD" --host="$AUTOTOOLS_HOST" \
-       --prefix="$IOS_PREFIX" ; then
+if ! ./configure --without-tests				\
+       --build="$AUTOTOOLS_BUILD" --host="$AUTOTOOLS_HOST"	\
+       --prefix="$IOS_PREFIX" ;
+then
    echo "Error: Failed to configure Expat"
    cat config.log
    exit 1
@@ -221,7 +221,9 @@ acl_interface_insert(struct acl_list* acl_interface,
 	struct sockaddr_storage* addr, socklen_t addrlen,
 	enum acl_access control)
 {
-	return acl_find_or_create(acl_interface, addr, addrlen, control);
+	struct acl_addr* node = acl_find_or_create(acl_interface, addr, addrlen, control);
+	node->is_interface = 1;
+	return node;
 }

 /** apply acl_tag string */
@@ -551,17 +553,6 @@ acl_list_apply_cfg(struct acl_list* acl, struct config_file* cfg,
 	return 1;
 }

-int
-acl_interface_compare(const void* k1, const void* k2)
-{
-	struct addr_tree_node* n1 = (struct addr_tree_node*)k1;
-	struct addr_tree_node* n2 = (struct addr_tree_node*)k2;
-	return sockaddr_cmp(&n1->addr, n1->addrlen, &n2->addr,
-		n2->addrlen);
-	/* We don't care about comparing node->net. All addresses in the
-	 * acl_interface tree have either 32 (ipv4) or 128 (ipv6). */
-}
-
 void
 acl_interface_init(struct acl_list* acl_interface)
 {
@@ -816,10 +807,23 @@ log_acl_action(const char* action, struct sockaddr_storage* addr,
 		addr_to_str(&acladdr->node.addr, acladdr->node.addrlen,
 			n, sizeof(n));
 		verbose(VERB_ALGO, "%s query from %s port %d because of "
-			"%s/%d %s", action, a, (int)port, n, acladdr->node.net,
+			"%s/%d %s%s", action, a, (int)port, n,
+			acladdr->node.net,
+			acladdr->is_interface?"(ACL on interface IP) ":"",
 			acl_access_to_str(acl));
 	} else {
 		verbose(VERB_ALGO, "%s query from %s port %d", action, a,
 			(int)port);
 	}
 }
+
+void acl_list_swap_tree(struct acl_list* acl, struct acl_list* data)
+{
+	/* swap tree and region */
+	rbtree_type oldtree = acl->tree;
+	struct regional* oldregion = acl->region;
+	acl->tree = data->tree;
+	acl->region = data->region;
+	data->tree = oldtree;
+	data->region = oldregion;
+}
@@ -107,6 +107,8 @@ struct acl_addr {
 	struct config_strlist** tag_datas;
 	/** size of the tag_datas array */
 	size_t tag_datas_size;
+	/* If the acl node is for an interface */
+	int is_interface;
 	/* view element, NULL if none */
 	struct view* view;
 };
@@ -147,9 +149,6 @@ acl_interface_insert(struct acl_list* acl_interface,
 int acl_list_apply_cfg(struct acl_list* acl, struct config_file* cfg,
 	struct views* v);

-/** compare ACL interface "addr_tree" nodes (+port) */
-int acl_interface_compare(const void* k1, const void* k2);
-
 /**
 * Initialise (also clean) the acl_interface struct.
 * @param acl_interface: where to store.
@@ -202,4 +201,12 @@ const char* acl_access_to_str(enum acl_access acl);
 void log_acl_action(const char* action, struct sockaddr_storage* addr,
 	socklen_t addrlen, enum acl_access acl, struct acl_addr* acladdr);

+/**
+ * Swap internal tree with preallocated entries.
+ * @param acl: the acl structure.
+ * @param data: the data structure used to take elements from. This contains
+ * 	the old elements on return.
+ */
+void acl_list_swap_tree(struct acl_list* acl, struct acl_list* data);
+
 #endif /* DAEMON_ACL_LIST_H */
@@ -692,7 +692,7 @@ load_msg(RES* ssl, sldns_buffer* buf, struct worker* worker)
 		return 1; /* skip this one, not all references satisfied */

 	if(!dns_cache_store(&worker->env, &qinf, &rep, 0, 0, 0, NULL, flags,
-		*worker->env.now)) {
+		*worker->env.now, 1)) {
 		log_warn("error out of memory");
 		return 0;
 	}
@@ -836,7 +836,7 @@ int print_deleg_lookup(RES* ssl, struct worker* worker, uint8_t* nm,
 	struct delegpt* dp;
 	struct dns_msg* msg;
 	struct regional* region = worker->scratchpad;
-	char b[260];
+	char b[LDNS_MAX_DOMAINLEN];
 	struct query_info qinfo;
 	struct iter_hints_stub* stub;
 	int nolock = 0;
@@ -323,8 +323,7 @@ daemon_init(void)
 	return daemon;	
 }

-static int setup_acl_for_ports(struct acl_list* list,
-	struct listen_port* port_list)
+int setup_acl_for_ports(struct acl_list* list, struct listen_port* port_list)
 {
 	struct acl_addr* acl_node;
 	for(; port_list; port_list=port_list->next) {
@@ -557,6 +556,12 @@ daemon_create_workers(struct daemon* daemon)
 		fatal_exit("out of memory during daemon init");
 	numport = daemon_get_shufport(daemon, shufport);
 	verbose(VERB_ALGO, "total of %d outgoing ports available", numport);
+
+#ifdef HAVE_NGTCP2
+	daemon->doq_table = doq_table_create(daemon->cfg, daemon->rand);
+	if(!daemon->doq_table)
+		fatal_exit("could not create doq_table: out of memory");
+#endif
 	
 	daemon->num = (daemon->cfg->num_threads?daemon->cfg->num_threads:1);
 	if(daemon->reuseport && (int)daemon->num < (int)daemon->num_ports) {
@@ -711,16 +716,16 @@ daemon_fork(struct daemon* daemon)
 #endif

 	log_assert(daemon);
-	if(!(daemon->views = views_create()))
+	if(!(daemon->env->views = views_create()))
 		fatal_exit("Could not create views: out of memory");
 	/* create individual views and their localzone/data trees */
-	if(!views_apply_cfg(daemon->views, daemon->cfg))
+	if(!views_apply_cfg(daemon->env->views, daemon->cfg))
 		fatal_exit("Could not set up views");

-	if(!acl_list_apply_cfg(daemon->acl, daemon->cfg, daemon->views))
+	if(!acl_list_apply_cfg(daemon->acl, daemon->cfg, daemon->env->views))
 		fatal_exit("Could not setup access control list");
 	if(!acl_interface_apply_cfg(daemon->acl_interface, daemon->cfg,
-		daemon->views))
+		daemon->env->views))
 		fatal_exit("Could not setup interface control list");
 	if(!tcl_list_apply_cfg(daemon->tcl, daemon->cfg))
 		fatal_exit("Could not setup TCP connection limits");
@@ -735,6 +740,14 @@ daemon_fork(struct daemon* daemon)
 				   "dnscrypt support");
 #endif
 	}
+	if(daemon->cfg->cookie_secret_file &&
+		daemon->cfg->cookie_secret_file[0]) {
+		if(!(daemon->cookie_secrets = cookie_secrets_create()))
+			fatal_exit("Could not create cookie_secrets: out of memory");
+		if(!cookie_secrets_apply_cfg(daemon->cookie_secrets,
+			daemon->cfg->cookie_secret_file))
+			fatal_exit("Could not setup cookie_secrets");
+	}
 	/* create global local_zones */
 	if(!(daemon->local_zones = local_zones_create()))
 		fatal_exit("Could not create local zones: out of memory");
@@ -748,15 +761,15 @@ daemon_fork(struct daemon* daemon)
 		fatal_exit("Could not set root or stub hints");

 	/* process raw response-ip configuration data */
-	if(!(daemon->respip_set = respip_set_create()))
+	if(!(daemon->env->respip_set = respip_set_create()))
 		fatal_exit("Could not create response IP set");
-	if(!respip_global_apply_cfg(daemon->respip_set, daemon->cfg))
+	if(!respip_global_apply_cfg(daemon->env->respip_set, daemon->cfg))
 		fatal_exit("Could not set up response IP set");
-	if(!respip_views_apply_cfg(daemon->views, daemon->cfg,
+	if(!respip_views_apply_cfg(daemon->env->views, daemon->cfg,
 		&have_view_respip_cfg))
 		fatal_exit("Could not set up per-view response IP sets");
-	daemon->use_response_ip = !respip_set_is_empty(daemon->respip_set) ||
-		have_view_respip_cfg;
+	daemon->use_response_ip = !respip_set_is_empty(
+		daemon->env->respip_set) || have_view_respip_cfg;

 	/* setup modules */
 	daemon_setup_modules(daemon);
@@ -872,14 +885,18 @@ daemon_cleanup(struct daemon* daemon)
 	daemon->env->hints = NULL;
 	local_zones_delete(daemon->local_zones);
 	daemon->local_zones = NULL;
-	respip_set_delete(daemon->respip_set);
-	daemon->respip_set = NULL;
-	views_delete(daemon->views);
-	daemon->views = NULL;
+	respip_set_delete(daemon->env->respip_set);
+	daemon->env->respip_set = NULL;
+	views_delete(daemon->env->views);
+	daemon->env->views = NULL;
 	if(daemon->env->auth_zones)
 		auth_zones_cleanup(daemon->env->auth_zones);
 	/* key cache is cleared by module deinit during next daemon_fork() */
 	daemon_remote_clear(daemon->rc);
+	if(daemon->fast_reload_thread)
+		fast_reload_thread_stop(daemon->fast_reload_thread);
+	if(daemon->fast_reload_printq_list)
+		fast_reload_printq_list_delete(daemon->fast_reload_printq_list);
 	for(i=0; i<daemon->num; i++)
 		worker_delete(daemon->workers[i]);
 	free(daemon->workers);
@@ -898,6 +915,10 @@ daemon_cleanup(struct daemon* daemon)
 #ifdef USE_DNSCRYPT
 	dnsc_delete(daemon->dnscenv);
 	daemon->dnscenv = NULL;
+#endif
+#ifdef HAVE_NGTCP2
+	doq_table_delete(daemon->doq_table);
+	daemon->doq_table = NULL;
 #endif
 	daemon->cfg = NULL;
 }
@@ -929,14 +950,20 @@ daemon_delete(struct daemon* daemon)
 	acl_list_delete(daemon->acl);
 	acl_list_delete(daemon->acl_interface);
 	tcl_list_delete(daemon->tcl);
+	cookie_secrets_delete(daemon->cookie_secrets);
 	listen_desetup_locks();
 	free(daemon->chroot);
 	free(daemon->pidfile);
+	free(daemon->cfgfile);
 	free(daemon->env);
 #ifdef HAVE_SSL
 	listen_sslctx_delete_ticket_keys();
-	SSL_CTX_free((SSL_CTX*)daemon->listen_sslctx);
-	SSL_CTX_free((SSL_CTX*)daemon->connect_sslctx);
+	SSL_CTX_free((SSL_CTX*)daemon->listen_dot_sslctx);
+	SSL_CTX_free((SSL_CTX*)daemon->listen_doh_sslctx);
+	SSL_CTX_free((SSL_CTX*)daemon->connect_dot_sslctx);
+#endif
+#ifdef HAVE_NGTCP2
+	SSL_CTX_free((SSL_CTX*)daemon->listen_quic_sslctx);
 #endif
 	free(daemon);
 	/* lex cleanup */
@@ -58,6 +58,10 @@ struct ub_randstate;
 struct daemon_remote;
 struct respip_set;
 struct shm_main_info;
+struct doq_table;
+struct cookie_secrets;
+struct fast_reload_thread;
+struct fast_reload_printq;

 #include "dnstap/dnstap_config.h"
 #ifdef USE_DNSTAP
@@ -95,8 +99,14 @@ struct daemon {
 	struct listen_port* rc_ports;
 	/** remote control connections management (for first worker) */
 	struct daemon_remote* rc;
-	/** ssl context for listening to dnstcp over ssl, and connecting ssl */
-	void* listen_sslctx, *connect_sslctx;
+	/** ssl context for listening to dnstcp over ssl */
+	void* listen_dot_sslctx;
+	/** ssl context for connecting to dnstcp over ssl */
+	void* connect_dot_sslctx;
+	/** ssl context for listening to DoH */
+	void* listen_doh_sslctx;
+	/** ssl context for listening to quic */
+	void* listen_quic_sslctx;
 	/** num threads allocated */
 	int num;
 	/** num threads allocated in the previous config or 0 at first */
@@ -129,15 +139,11 @@ struct daemon {
 	struct timeval time_last_stat;
 	/** time when daemon started */
 	struct timeval time_boot;
-	/** views structure containing view tree */
-	struct views* views;
 #ifdef USE_DNSTAP
 	/** the dnstap environment master value, copied and changed by threads*/
 	struct dt_env* dtenv;
 #endif
 	struct shm_main_info* shm_info;
-	/** response-ip set with associated actions and tags. */
-	struct respip_set* respip_set;
 	/** some response-ip tags or actions are configured if true */
 	int use_response_ip;
 	/** some RPZ policies are configured */
@@ -146,8 +152,23 @@ struct daemon {
 	/** the dnscrypt environment */
 	struct dnsc_env* dnscenv;
 #endif
+	/** the doq connection table */
+	struct doq_table* doq_table;
 	/** reuse existing cache on reload if other conditions allow it. */
 	int reuse_cache;
+	/** the EDNS cookie secrets from the cookie-secret-file */
+	struct cookie_secrets* cookie_secrets;
+	/** the fast reload thread, or NULL */
+	struct fast_reload_thread* fast_reload_thread;
+	/** the fast reload printq list */
+	struct fast_reload_printq* fast_reload_printq_list;
+	/** the fast reload option to drop mesh queries, true if so. */
+	int fast_reload_drop_mesh;
+	/** for fast reload, if the tcl, tcp connection limits, has
+	 * changes for workers */
+	int fast_reload_tcl_has_changes;
+	/** config file name */
+	char* cfgfile;
 };

 /**
@@ -200,4 +221,12 @@ void daemon_delete(struct daemon* daemon);
 */
 void daemon_apply_cfg(struct daemon* daemon, struct config_file* cfg);

+/**
+ * Setup acl list to have entries for the port list.
+ * @param list: the acl interface
+ * @param port_list: list of open ports, or none.
+ * @return false on failure
+ */
+int setup_acl_for_ports(struct acl_list* list, struct listen_port* port_list);
+
 #endif /* DAEMON_H */
@@ -48,6 +48,7 @@
 #ifdef HAVE_OPENSSL_SSL_H
 #include <openssl/ssl.h>
 #endif
+#include "util/locks.h"
 struct config_file;
 struct listen_list;
 struct listen_port;
@@ -55,6 +56,7 @@ struct worker;
 struct comm_reply;
 struct comm_point;
 struct daemon_remote;
+struct config_strlist_head;

 /** number of milliseconds timeout on incoming remote control handshake */
 #define REMOTE_CONTROL_TCP_TIMEOUT 120000
@@ -118,6 +120,137 @@ struct remote_stream {
 };
 typedef struct remote_stream RES;

+/**
+ * Notification status. This is exchanged between the fast reload thread
+ * and the server thread, over the commpair sockets.
+ */
+enum fast_reload_notification {
+	/** nothing, not used */
+	fast_reload_notification_none = 0,
+	/** the fast reload thread is done */
+	fast_reload_notification_done = 1,
+	/** the fast reload thread is done but with an error, it failed */
+	fast_reload_notification_done_error = 2,
+	/** the fast reload thread is told to exit by the server thread.
+	 * Sent on server quit while the reload is running. */
+	fast_reload_notification_exit = 3,
+	/** the fast reload thread has exited, after being told to exit */
+	fast_reload_notification_exited = 4,
+	/** the fast reload thread has information to print out */
+	fast_reload_notification_printout = 5,
+	/** stop as part of the reload the thread and other threads */
+	fast_reload_notification_reload_stop = 6,
+	/** ack the stop as part of the reload, and also ack start */
+	fast_reload_notification_reload_ack = 7,
+	/** resume from stop as part of the reload */
+	fast_reload_notification_reload_start = 8,
+	/** the fast reload thread wants the mainthread to poll workers,
+	 * after the reload, sent when nopause is used */
+	fast_reload_notification_reload_nopause_poll = 9
+};
+
+/**
+ * Fast reload printout queue. Contains a list of strings, that need to be
+ * printed over the file descriptor.
+ */
+struct fast_reload_printq {
+	/** if this item is in a list, the previous and next */
+	struct fast_reload_printq *prev, *next;
+	/** if this item is in a list, it is true. */
+	int in_list;
+	/** list of strings to printout */
+	struct config_strlist_head* to_print;
+	/** the current item to print. It is malloced. NULL if none. */
+	char* client_item;
+	/** The length, strlen, of the client_item, that has to be sent. */
+	int client_len;
+	/** The number of bytes sent of client_item. */
+	int client_byte_count;
+	/** the comm point for the client connection, the remote control
+	 * client. */
+	struct comm_point* client_cp;
+	/** the remote control connection to print output to. */
+	struct remote_stream remote;
+	/** the worker that the event is added in */
+	struct worker* worker;
+};
+
+/**
+ * Fast reload auth zone change. Keeps track if an auth zone was removed,
+ * added or changed. This is needed because workers can have events for
+ * dealing with auth zones, like transfers, and those have to be removed
+ * too, not just the auth zone structure from the tree. */
+struct fast_reload_auth_change {
+	/** next in the list of auth zone changes. */
+	struct fast_reload_auth_change* next;
+	/** the zone in the old config */
+	struct auth_zone* old_z;
+	/** the zone in the new config */
+	struct auth_zone* new_z;
+	/** if the zone was deleted */
+	int is_deleted;
+	/** if the zone was added */
+	int is_added;
+	/** if the zone has been changed */
+	int is_changed;
+};
+
+/**
+ * Fast reload thread structure
+ */
+struct fast_reload_thread {
+	/** the thread number for the dtio thread,
+	 * must be first to cast thread arg to int* in checklock code. */
+	int threadnum;
+	/** communication socket pair, that sends commands */
+	int commpair[2];
+	/** thread id, of the io thread */
+	ub_thread_type tid;
+	/** if the io processing has started */
+	int started;
+	/** if the thread has to quit */
+	int need_to_quit;
+	/** verbosity of the fast_reload command, the number of +v options */
+	int fr_verb;
+	/** option to not pause threads during reload */
+	int fr_nopause;
+	/** option to drop mesh queries */
+	int fr_drop_mesh;
+
+	/** the event that listens on the remote service worker to the
+	 * commpair, it receives content from the fast reload thread. */
+	void* service_event;
+	/** if the event that listens on the remote service worker has
+	 * been added to the comm base. */
+	int service_event_is_added;
+	/** the service event can read a cmd, nonblocking, so it can
+	 * save the partial read cmd here */
+	uint32_t service_read_cmd;
+	/** the number of bytes in service_read_cmd */
+	int service_read_cmd_count;
+	/** the worker that the service_event is added in */
+	struct worker* worker;
+
+	/** the printout of output to the remote client. */
+	struct fast_reload_printq *printq;
+
+	/** lock on fr_output, to stop race when both remote control thread
+	 * and fast reload thread use fr_output list. */
+	lock_basic_type fr_output_lock;
+	/** list of strings, that the fast reload thread produces that have
+	 * to be printed. The remote control thread can pick them up with
+	 * the lock. */
+	struct config_strlist_head* fr_output;
+
+	/** communication socket pair, to respond to the reload request */
+	int commreload[2];
+
+	/** the list of auth zone changes. */
+	struct fast_reload_auth_change* auth_zone_change_list;
+	/** the old tree of auth zones, to lookup. */
+	struct auth_zones* old_auth_zones;
+};
+
 /**
 * Create new remote control state for the daemon.
 * @param cfg: config file with key file settings.
@@ -203,4 +336,38 @@ int ssl_printf(RES* ssl, const char* format, ...)
 int ssl_read_line(RES* ssl, char* buf, size_t max);
 #endif /* HAVE_SSL */

+/**
+ * Start fast reload thread
+ * @param ssl: the RES connection to print to.
+ * @param worker: the remote servicing worker.
+ * @param s: the rc_state that is servicing the remote control connection to
+ *	the remote control client. It needs to be moved away to stay connected
+ *	while the fast reload is running.
+ * @param fr_verb: verbosity to print output at. 0 is nothing, 1 is some
+ *	and 2 is more detail.
+ * @param fr_nopause: option to not pause threads during reload.
+ * @param fr_drop_mesh: option to drop mesh queries.
+ */
+void fast_reload_thread_start(RES* ssl, struct worker* worker,
+	struct rc_state* s, int fr_verb, int fr_nopause, int fr_drop_mesh);
+
+/**
+ * Stop fast reload thread
+ * @param fast_reload_thread: the thread struct.
+ */
+void fast_reload_thread_stop(struct fast_reload_thread* fast_reload_thread);
+
+/** fast reload thread commands to remote service thread event callback */
+void fast_reload_service_cb(int fd, short bits, void* arg);
+
+/** fast reload callback for the remote control client connection */
+int fast_reload_client_callback(struct comm_point* c, void* arg, int err,
+	struct comm_reply* rep);
+
+/** fast reload printq delete list */
+void fast_reload_printq_list_delete(struct fast_reload_printq* list);
+
+/** Pick up per worker changes after a fast reload. */
+void fast_reload_worker_pickup_changes(struct worker* worker);
+
 #endif /* DAEMON_REMOTE_H */
@@ -281,6 +281,12 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 		s->svr.rpz_action[i] += (long long)worker->env.mesh->rpz_action[i];
 	timehist_export(worker->env.mesh->histogram, s->svr.hist,
 		NUM_BUCKETS_HIST);
+	s->svr.num_queries_discard_timeout +=
+		(long long)worker->env.mesh->num_queries_discard_timeout;
+	s->svr.num_queries_wait_limit +=
+		(long long)worker->env.mesh->num_queries_wait_limit;
+	s->svr.num_dns_error_reports +=
+		(long long)worker->env.mesh->num_dns_error_reports;
 	/* values from outside network */
 	s->svr.unwanted_replies = (long long)worker->back->unwanted_replies;
 	s->svr.qtcp_outgoing = (long long)worker->back->num_tcp_outgoing;
@@ -325,20 +331,8 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 	s->svr.num_query_dnscrypt_replay = 0;
 #endif /* USE_DNSCRYPT */
 	if(worker->env.auth_zones) {
-		if(reset && !worker->env.cfg->stat_cumulative) {
-			lock_rw_wrlock(&worker->env.auth_zones->lock);
-		} else {
-			lock_rw_rdlock(&worker->env.auth_zones->lock);
-		}
-		s->svr.num_query_authzone_up = (long long)worker->env.
-			auth_zones->num_query_up;
-		s->svr.num_query_authzone_down = (long long)worker->env.
-			auth_zones->num_query_down;
-		if(reset && !worker->env.cfg->stat_cumulative) {
-			worker->env.auth_zones->num_query_up = 0;
-			worker->env.auth_zones->num_query_down = 0;
-		}
-		lock_rw_unlock(&worker->env.auth_zones->lock);
+		s->svr.num_query_authzone_up += (long long)worker->env.mesh->num_query_authzone_up;
+		s->svr.num_query_authzone_down += (long long)worker->env.mesh->num_query_authzone_down;
 	}
 	s->svr.mem_stream_wait =
 		(long long)tcp_req_info_get_stream_buffer_size();
@@ -346,6 +340,12 @@ server_stats_compile(struct worker* worker, struct ub_stats_info* s, int reset)
 		(long long)http2_get_query_buffer_size();
 	s->svr.mem_http2_response_buffer =
 		(long long)http2_get_response_buffer_size();
+#ifdef HAVE_NGTCP2
+	s->svr.mem_quic = (long long)doq_table_quic_size_get(
+		worker->daemon->doq_table);
+#else
+	s->svr.mem_quic = 0;
+#endif /* HAVE_NGTCP2 */

 	/* Set neg cache usage numbers */
 	set_neg_cache_stats(worker, &s->svr, reset);
@@ -445,9 +445,15 @@ void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 	total->svr.num_queries_cookie_valid += a->svr.num_queries_cookie_valid;
 	total->svr.num_queries_cookie_client += a->svr.num_queries_cookie_client;
 	total->svr.num_queries_cookie_invalid += a->svr.num_queries_cookie_invalid;
+	total->svr.num_queries_discard_timeout +=
+		a->svr.num_queries_discard_timeout;
+	total->svr.num_queries_wait_limit += a->svr.num_queries_wait_limit;
+	total->svr.num_dns_error_reports += a->svr.num_dns_error_reports;
 	total->svr.num_queries_missed_cache += a->svr.num_queries_missed_cache;
 	total->svr.num_queries_prefetch += a->svr.num_queries_prefetch;
 	total->svr.num_queries_timed_out += a->svr.num_queries_timed_out;
+	total->svr.num_query_authzone_up += a->svr.num_query_authzone_up;
+	total->svr.num_query_authzone_down += a->svr.num_query_authzone_down;
 	if (total->svr.max_query_time_us < a->svr.max_query_time_us)
 		total->svr.max_query_time_us = a->svr.max_query_time_us;
 	total->svr.sum_query_list_size += a->svr.sum_query_list_size;
@@ -455,9 +461,9 @@ void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 #ifdef USE_DNSCRYPT
 	total->svr.num_query_dnscrypt_crypted += a->svr.num_query_dnscrypt_crypted;
 	total->svr.num_query_dnscrypt_cert += a->svr.num_query_dnscrypt_cert;
-	total->svr.num_query_dnscrypt_cleartext += \
+	total->svr.num_query_dnscrypt_cleartext +=
 		a->svr.num_query_dnscrypt_cleartext;
-	total->svr.num_query_dnscrypt_crypted_malformed += \
+	total->svr.num_query_dnscrypt_crypted_malformed +=
 		a->svr.num_query_dnscrypt_crypted_malformed;
 #endif /* USE_DNSCRYPT */
 	/* the max size reached is upped to higher of both */
@@ -474,6 +480,7 @@ void server_stats_add(struct ub_stats_info* total, struct ub_stats_info* a)
 		total->svr.qtls += a->svr.qtls;
 		total->svr.qtls_resume += a->svr.qtls_resume;
 		total->svr.qhttps += a->svr.qhttps;
+		total->svr.qquic += a->svr.qquic;
 		total->svr.qipv6 += a->svr.qipv6;
 		total->svr.qbit_QR += a->svr.qbit_QR;
 		total->svr.qbit_AA += a->svr.qbit_AA;
@@ -533,7 +540,8 @@ void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
 	else	stats->qclass_big++;
 	stats->qopcode[ LDNS_OPCODE_WIRE(sldns_buffer_begin(c->buffer)) ]++;
 	if(c->type != comm_udp) {
-		stats->qtcp++;
+		if(c->type != comm_doq)
+			stats->qtcp++;
 		if(c->ssl != NULL) {
 			stats->qtls++;
 #ifdef HAVE_SSL
@@ -542,6 +550,10 @@ void server_stats_insquery(struct ub_server_stats* stats, struct comm_point* c,
 #endif
 			if(c->type == comm_http)
 				stats->qhttps++;
+#ifdef HAVE_NGTCP2
+			else if(c->type == comm_doq)
+				stats->qquic++;
+#endif
 		}
 	}
 	if(repinfo && addr_is_ip6(&repinfo->remote_addr, repinfo->remote_addrlen))
@@ -463,6 +463,64 @@ detach(void)
 #endif /* HAVE_DAEMON */
 }

+/* setup a listening ssl context, fatal_exit() on any failure */
+static void
+setup_listen_sslctx(void** ctx, int is_dot, int is_doh, struct config_file* cfg)
+{
+#ifdef HAVE_SSL
+	if(!(*ctx = listen_sslctx_create(
+		cfg->ssl_service_key, cfg->ssl_service_pem, NULL,
+		cfg->tls_ciphers, cfg->tls_ciphersuites,
+		(cfg->tls_session_ticket_keys.first &&
+		cfg->tls_session_ticket_keys.first->str[0] != 0),
+		is_dot, is_doh))) {
+		fatal_exit("could not set up listen SSL_CTX");
+	}
+#else /* HAVE_SSL */
+	(void)ctx;(void)is_dot;(void)is_doh;(void)cfg;
+#endif /* HAVE_SSL */
+}
+
+/* setups the needed ssl contexts, fatal_exit() on any failure */
+static void
+setup_sslctxs(struct daemon* daemon, struct config_file* cfg)
+{
+#ifdef HAVE_SSL
+	if(!(daemon->rc = daemon_remote_create(cfg)))
+		fatal_exit("could not set up remote-control");
+	if(cfg->ssl_service_key && cfg->ssl_service_key[0]) {
+		/* setup the session keys; the callback to use them will be
+		 * attached to each sslctx separately */
+		if(cfg->tls_session_ticket_keys.first &&
+			cfg->tls_session_ticket_keys.first->str[0] != 0) {
+			if(!listen_sslctx_setup_ticket_keys(
+				cfg->tls_session_ticket_keys.first)) {
+				fatal_exit("could not set session ticket SSL_CTX");
+			}
+		}
+		(void)setup_listen_sslctx(&daemon->listen_dot_sslctx, 1, 0, cfg);
+#ifdef HAVE_NGHTTP2_NGHTTP2_H
+		if(cfg_has_https(cfg)) {
+			(void)setup_listen_sslctx(&daemon->listen_doh_sslctx, 0, 1, cfg);
+		}
+#endif
+#ifdef HAVE_NGTCP2
+		if(cfg_has_quic(cfg)) {
+			if(!(daemon->listen_quic_sslctx = quic_sslctx_create(
+				cfg->ssl_service_key, cfg->ssl_service_pem, NULL))) {
+				fatal_exit("could not set up quic SSL_CTX");
+			}
+		}
+#endif /* HAVE_NGTCP2 */
+	}
+	if(!(daemon->connect_dot_sslctx = connect_sslctx_create(NULL, NULL,
+		cfg->tls_cert_bundle, cfg->tls_win_cert)))
+		fatal_exit("could not set up connect SSL_CTX");
+#else /* HAVE_SSL */
+	(void)daemon;(void)cfg;
+#endif /* HAVE_SSL */
+}
+
 /** daemonize, drop user privileges and chroot if needed */
 static void
 perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
@@ -489,36 +547,7 @@ perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
 #endif

 	/* read ssl keys while superuser and outside chroot */
-#ifdef HAVE_SSL
-	if(!(daemon->rc = daemon_remote_create(cfg)))
-		fatal_exit("could not set up remote-control");
-	if(cfg->ssl_service_key && cfg->ssl_service_key[0]) {
-		if(!(daemon->listen_sslctx = listen_sslctx_create(
-			cfg->ssl_service_key, cfg->ssl_service_pem, NULL)))
-			fatal_exit("could not set up listen SSL_CTX");
-		if(cfg->tls_ciphers && cfg->tls_ciphers[0]) {
-			if (!SSL_CTX_set_cipher_list(daemon->listen_sslctx, cfg->tls_ciphers)) {
-				fatal_exit("failed to set tls-cipher %s", cfg->tls_ciphers);
-			}
-		}
-#ifdef HAVE_SSL_CTX_SET_CIPHERSUITES
-		if(cfg->tls_ciphersuites && cfg->tls_ciphersuites[0]) {
-			if (!SSL_CTX_set_ciphersuites(daemon->listen_sslctx, cfg->tls_ciphersuites)) {
-				fatal_exit("failed to set tls-ciphersuites %s", cfg->tls_ciphersuites);
-			}
-		}
-#endif
-		if(cfg->tls_session_ticket_keys.first &&
-			cfg->tls_session_ticket_keys.first->str[0] != 0) {
-			if(!listen_sslctx_setup_ticket_keys(daemon->listen_sslctx, cfg->tls_session_ticket_keys.first)) {
-				fatal_exit("could not set session ticket SSL_CTX");
-			}
-		}
-	}
-	if(!(daemon->connect_sslctx = connect_sslctx_create(NULL, NULL,
-		cfg->tls_cert_bundle, cfg->tls_win_cert)))
-		fatal_exit("could not set up connect SSL_CTX");
-#endif
+	(void)setup_sslctxs(daemon, cfg);

 	/* init syslog (as root) if needed, before daemonize, otherwise
 	 * a fork error could not be printed since daemonize closed stderr.*/
@@ -681,6 +710,9 @@ perform_setup(struct daemon* daemon, struct config_file* cfg, int debug_mode,
 	 * it would succeed on SIGHUP as well */
 	if(!cfg->use_syslog)
 		log_init(cfg->logfile, cfg->use_syslog, cfg->chrootdir);
+	daemon->cfgfile = strdup(*cfgfile);
+	if(!daemon->cfgfile)
+		fatal_exit("out of memory in daemon cfgfile strdup");
 }

 /**
@@ -160,9 +160,11 @@ worker_mem_report(struct worker* ATTR_UNUSED(worker),
 		+ sizeof(worker->rndstate)
 		+ regional_get_mem(worker->scratchpad)
 		+ sizeof(*worker->env.scratch_buffer)
-		+ sldns_buffer_capacity(worker->env.scratch_buffer)
-		+ forwards_get_mem(worker->env.fwds)
-		+ hints_get_mem(worker->env.hints);
+		+ sldns_buffer_capacity(worker->env.scratch_buffer);
+	if(worker->daemon->env->fwds)
+		log_info("forwards=%u", (unsigned)forwards_get_mem(worker->env.fwds));
+	if(worker->daemon->env->hints)
+		log_info("hints=%u", (unsigned)hints_get_mem(worker->env.hints));
 	if(worker->thread_num == 0)
 		me += acl_list_get_mem(worker->daemon->acl);
 	if(cur_serv) {
@@ -369,6 +371,84 @@ worker_check_request(sldns_buffer* pkt, struct worker* worker,
 	return;
 }

+/**
+ * Send fast-reload acknowledgement to the mainthread in one byte.
+ * This signals that this worker has received the previous command.
+ * The worker is waiting if that is after a reload_stop command.
+ * Or the worker has briefly processed the event itself, and in doing so
+ * released data pointers to old config, after a reload_poll command.
+ */
+static void
+worker_send_reload_ack(struct worker* worker)
+{
+	/* If this is clipped to 8 bits because thread_num>255, then that
+	 * is not a problem, the receiver counts the number of bytes received.
+	 * The number is informative only. */
+	uint8_t c = (uint8_t)worker->thread_num;
+	ssize_t ret;
+	while(1) {
+		ret = send(worker->daemon->fast_reload_thread->commreload[1],
+			(void*)&c, 1, 0);
+		if(ret == -1) {
+			if(
+#ifndef USE_WINSOCK
+				errno == EINTR || errno == EAGAIN
+#  ifdef EWOULDBLOCK
+				|| errno == EWOULDBLOCK
+#  endif
+#else
+				WSAGetLastError() == WSAEINTR ||
+				WSAGetLastError() == WSAEINPROGRESS ||
+				WSAGetLastError() == WSAEWOULDBLOCK
+#endif
+				)
+				continue; /* Try again. */
+			log_err("worker reload ack reply: send failed: %s",
+				sock_strerror(errno));
+			break;
+		}
+		break;
+	}
+}
+
+/** stop and wait to resume the worker */
+static void
+worker_stop_and_wait(struct worker* worker)
+{
+	uint8_t* buf = NULL;
+	uint32_t len = 0, cmd;
+	worker_send_reload_ack(worker);
+	/* wait for reload */
+	if(!tube_read_msg(worker->cmd, &buf, &len, 0)) {
+		log_err("worker reload read reply failed");
+		return;
+	}
+	if(len != sizeof(uint32_t)) {
+		log_err("worker reload reply, bad control msg length %d",
+			(int)len);
+		free(buf);
+		return;
+	}
+	cmd = sldns_read_uint32(buf);
+	free(buf);
+	if(cmd == worker_cmd_quit) {
+		/* quit anyway */
+		verbose(VERB_ALGO, "reload reply, control cmd quit");
+		comm_base_exit(worker->base);
+		return;
+	}
+	if(cmd != worker_cmd_reload_start) {
+		log_err("worker reload reply, wrong reply command");
+	}
+	if(worker->daemon->fast_reload_drop_mesh) {
+		verbose(VERB_ALGO, "worker: drop mesh queries after reload");
+		mesh_delete_all(worker->env.mesh);
+	}
+	fast_reload_worker_pickup_changes(worker);
+	worker_send_reload_ack(worker);
+	verbose(VERB_ALGO, "worker resume after reload");
+}
+
 void
 worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube), uint8_t* msg,
 	size_t len, int error, void* arg)
@@ -404,6 +484,15 @@ worker_handle_control_cmd(struct tube* ATTR_UNUSED(tube), uint8_t* msg,
 		verbose(VERB_ALGO, "got control cmd remote");
 		daemon_remote_exec(worker);
 		break;
+	case worker_cmd_reload_stop:
+		verbose(VERB_ALGO, "got control cmd reload_stop");
+		worker_stop_and_wait(worker);
+		break;
+	case worker_cmd_reload_poll:
+		verbose(VERB_ALGO, "got control cmd reload_poll");
+		fast_reload_worker_pickup_changes(worker);
+		worker_send_reload_ack(worker);
+		break;
 	default:
 		log_err("bad command %d", (int)cmd);
 		break;
@@ -598,7 +687,8 @@ apply_respip_action(struct worker* worker, const struct query_info* qinfo,
 		return 1;

 	if(!respip_rewrite_reply(qinfo, cinfo, rep, encode_repp, &actinfo,
-		alias_rrset, 0, worker->scratchpad, az, NULL))
+		alias_rrset, 0, worker->scratchpad, az, NULL,
+		worker->env.views, worker->env.respip_set))
 		return 0;

 	/* xxx_deny actions mean dropping the reply, unless the original reply
@@ -659,22 +749,18 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	if(rep->ttl < timenow) {
 		/* Check if we need to serve expired now */
 		if(worker->env.cfg->serve_expired &&
-			!worker->env.cfg->serve_expired_client_timeout
+			/* if serve-expired-client-timeout is set, serve
+			 * an expired record without attempting recursion
+			 * if the serve_expired_norec_ttl is set for the record
+			 * as we know that recursion is currently failing. */
+			(!worker->env.cfg->serve_expired_client_timeout ||
+			 timenow < rep->serve_expired_norec_ttl)
 #ifdef USE_CACHEDB
 			&& !(worker->env.cachedb_enabled &&
 			  worker->env.cfg->cachedb_check_when_serve_expired)
 #endif
 			) {
-				if(worker->env.cfg->serve_expired_ttl &&
-					rep->serve_expired_ttl < timenow)
-					return 0;
-				/* Ignore expired failure answers */
-				if(FLAGS_GET_RCODE(rep->flags) !=
-					LDNS_RCODE_NOERROR &&
-					FLAGS_GET_RCODE(rep->flags) !=
-					LDNS_RCODE_NXDOMAIN &&
-					FLAGS_GET_RCODE(rep->flags) !=
-					LDNS_RCODE_YXDOMAIN)
+				if(!reply_info_can_answer_expired(rep, timenow))
 					return 0;
 				if(!rrset_array_lock(rep->ref, rep->rrset_count, 0))
 					return 0;
@@ -763,7 +849,8 @@ answer_from_cache(struct worker* worker, struct query_info* qinfo,
 	} else if(partial_rep &&
 		!respip_merge_cname(partial_rep, qinfo, rep, cinfo,
 		must_validate, &encode_rep, worker->scratchpad,
-		worker->env.auth_zones)) {
+		worker->env.auth_zones, worker->env.views,
+		worker->env.respip_set)) {
 		goto bail_out;
 	}
 	if(encode_rep != rep) {
@@ -1084,7 +1171,7 @@ answer_notify(struct worker* w, struct query_info* qinfo,

 	if(verbosity >= VERB_DETAIL) {
 		char buf[380];
-		char zname[255+1];
+		char zname[LDNS_MAX_DOMAINLEN];
 		char sr[25];
 		dname_str(qinfo->qname, zname);
 		sr[0]=0;
@@ -1415,7 +1502,7 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		return 0;
 	}
 	if(c->dnscrypt && !repinfo->is_dnscrypted) {
-		char buf[LDNS_MAX_DOMAINLEN+1];
+		char buf[LDNS_MAX_DOMAINLEN];
 		/* Check if this is unencrypted and asking for certs */
 		worker_check_request(c->buffer, worker, &check_result);
 		if(check_result.value != 0) {
@@ -1571,7 +1658,8 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 	if((ret=parse_edns_from_query_pkt(
 			c->buffer, &edns, worker->env.cfg, c, repinfo,
 			(worker->env.now ? *worker->env.now : time(NULL)),
-			worker->scratchpad)) != 0) {
+			worker->scratchpad,
+			worker->daemon->cookie_secrets)) != 0) {
 		struct edns_data reply_edns;
 		verbose(VERB_ALGO, "worker parse edns: formerror.");
 		log_addr(VERB_CLIENT, "from", &repinfo->client_addr,
@@ -1814,7 +1902,7 @@ worker_handle_request(struct comm_point* c, void* arg, int error,
 		cinfo_tmp.tag_datas = acladdr->tag_datas;
 		cinfo_tmp.tag_datas_size = acladdr->tag_datas_size;
 		cinfo_tmp.view = acladdr->view;
-		cinfo_tmp.respip_set = worker->daemon->respip_set;
+		cinfo_tmp.view_name = NULL;
 		cinfo = &cinfo_tmp;
 	}

@@ -1846,10 +1934,10 @@ lookup_cache:
 				 * its qname must be that used for cache
 				 * lookup. */
 				if((worker->env.cfg->prefetch &&
-					*worker->env.now >= rep->prefetch_ttl) ||
+					rep->prefetch_ttl <= *worker->env.now) ||
 					(worker->env.cfg->serve_expired &&
-					*worker->env.now > rep->ttl)) {
-
+					rep->ttl < *worker->env.now  &&
+					!(*worker->env.now < rep->serve_expired_norec_ttl))) {
 					time_t leeway = rep->ttl - *worker->env.now;
 					if(rep->ttl < *worker->env.now)
 						leeway = 0;
@@ -1967,13 +2055,13 @@ send_reply_rc:
 				&repinfo->client_addr, repinfo->client_addrlen,
 				tv, 1, c->buffer,
 				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr:NULL),
-				c->type);
+				c->type, c->ssl);
 		} else {
 			log_reply_info(NO_VERBOSE, &qinfo,
 				&repinfo->client_addr, repinfo->client_addrlen,
 				tv, 1, c->buffer,
 				(worker->env.cfg->log_destaddr?(void*)repinfo->c->socket->addr:NULL),
-				c->type);
+				c->type, c->ssl);
 		}
 	}
 #ifdef USE_DNSCRYPT
@@ -2174,8 +2262,11 @@ worker_init(struct worker* worker, struct config_file *cfg,
 			: cfg->tcp_idle_timeout,
 		cfg->harden_large_queries, cfg->http_max_streams,
 		cfg->http_endpoint, cfg->http_notls_downstream,
-		worker->daemon->tcl, worker->daemon->listen_sslctx,
-		dtenv, worker_handle_request, worker);
+		worker->daemon->tcl, worker->daemon->listen_dot_sslctx,
+		worker->daemon->listen_doh_sslctx,
+		worker->daemon->listen_quic_sslctx,
+		dtenv, worker->daemon->doq_table, worker->env.rnd,
+		cfg, worker_handle_request, worker);
 	if(!worker->front) {
 		log_err("could not create listening sockets");
 		worker_delete(worker);
@@ -2190,7 +2281,7 @@ worker_init(struct worker* worker, struct config_file *cfg,
 		cfg->unwanted_threshold, cfg->outgoing_tcp_mss,
 		&worker_alloc_cleanup, worker,
 		cfg->do_udp || cfg->udp_upstream_without_downstream,
-		worker->daemon->connect_sslctx, cfg->delay_close,
+		worker->daemon->connect_dot_sslctx, cfg->delay_close,
 		cfg->tls_use_sni, dtenv, cfg->udp_connect,
 		cfg->max_reuse_tcp_queries, cfg->tcp_reuse_timeout,
 		cfg->tcp_auth_query_timeout);
@@ -2509,3 +2600,19 @@ void dtio_mainfdcallback(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
 	log_assert(0);
 }
 #endif
+
+#ifdef HAVE_NGTCP2
+void doq_client_event_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
+
+#ifdef HAVE_NGTCP2
+void doq_client_timer_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
@@ -72,7 +72,13 @@ enum worker_commands {
 	/** obtain statistics without statsclear */
 	worker_cmd_stats_noreset,
 	/** execute remote control command */
-	worker_cmd_remote
+	worker_cmd_remote,
+	/** for fast-reload, perform stop */
+	worker_cmd_reload_stop,
+	/** for fast-reload, start again */
+	worker_cmd_reload_start,
+	/** for fast-reload, poll to make sure worker has released data */
+	worker_cmd_reload_poll
 };

 /**
@@ -657,8 +657,9 @@ handle_event_moddone(struct module_qstate* qstate, int id)
 		qstate->return_msg->rep &&
 		!dns_cache_store(
 			qstate->env, &qstate->qinfo, qstate->return_msg->rep,
-			0, 0, 0, NULL,
-			qstate->query_flags, qstate->qstarttime))
+			0, qstate->prefetch_leeway, 0, NULL,
+			qstate->query_flags, qstate->qstarttime,
+			qstate->is_valrec))
 		log_err("out of memory");

 	/* do nothing */
@@ -701,6 +702,7 @@ dns64_operate(struct module_qstate* qstate, enum module_ev event, int id,
 			iq->state = DNS64_NEW_QUERY;
 			iq->started_no_cache_store = qstate->no_cache_store;
 			qstate->no_cache_store = 1;
+			ATTR_FALLTHROUGH
  			/* fallthrough */
 		case module_event_pass:
 			qstate->ext_state[id] = handle_event_pass(qstate, id);
@@ -846,6 +848,7 @@ dns64_adjust_a(int id, struct module_qstate* super, struct module_qstate* qstate
 	 */
 	cp = construct_reply_info_base(super->region, rep->flags, rep->qdcount,
 		rep->ttl, rep->prefetch_ttl, rep->serve_expired_ttl,
+		rep->serve_expired_norec_ttl,
 		rep->an_numrrsets, rep->ns_numrrsets, rep->ar_numrrsets,
 		rep->rrset_count, rep->security, LDNS_EDE_NONE);
 	if(!cp)
@@ -1006,7 +1009,8 @@ dns64_inform_super(struct module_qstate* qstate, int id,
 	/* Store the generated response in cache. */
 	if ( (!super_dq || !super_dq->started_no_cache_store) &&
 		!dns_cache_store(super->env, &super->qinfo, super->return_msg->rep,
-		0, 0, 0, NULL, super->query_flags, qstate->qstarttime))
+		0, super->prefetch_leeway, 0, NULL, super->query_flags,
+		qstate->qstarttime, qstate->is_valrec))
 		log_err("out of memory");
 }

@@ -192,8 +192,11 @@ static void
 dt_apply_identity(struct dt_env *env, struct config_file *cfg)
 {
 	char buf[MAXHOSTNAMELEN+1];
-	if (!cfg->dnstap_send_identity)
+	if (!cfg->dnstap_send_identity) {
+		free(env->identity);
+		env->identity = NULL;
 		return;
+	}
 	free(env->identity);
 	if (cfg->dnstap_identity == NULL || cfg->dnstap_identity[0] == 0) {
 		if (gethostname(buf, MAXHOSTNAMELEN) == 0) {
@@ -215,8 +218,11 @@ dt_apply_identity(struct dt_env *env, struct config_file *cfg)
 static void
 dt_apply_version(struct dt_env *env, struct config_file *cfg)
 {
-	if (!cfg->dnstap_send_version)
+	if (!cfg->dnstap_send_version) {
+		free(env->version);
+		env->version = NULL;
 		return;
+	}
 	free(env->version);
 	if (cfg->dnstap_version == NULL || cfg->dnstap_version[0] == 0)
 		env->version = strdup(PACKAGE_STRING);
@@ -230,13 +236,8 @@ dt_apply_version(struct dt_env *env, struct config_file *cfg)
 }

 void
-dt_apply_cfg(struct dt_env *env, struct config_file *cfg)
+dt_apply_logcfg(struct dt_env *env, struct config_file *cfg)
 {
-	if (!cfg->dnstap)
-		return;
-
-	dt_apply_identity(env, cfg);
-	dt_apply_version(env, cfg);
 	if ((env->log_resolver_query_messages = (unsigned int)
 	     cfg->dnstap_log_resolver_query_messages))
 	{
@@ -275,6 +276,17 @@ dt_apply_cfg(struct dt_env *env, struct config_file *cfg)
 	lock_basic_unlock(&env->sample_lock);
 }

+void
+dt_apply_cfg(struct dt_env *env, struct config_file *cfg)
+{
+	if (!cfg->dnstap)
+		return;
+
+	dt_apply_identity(env, cfg);
+	dt_apply_version(env, cfg);
+	dt_apply_logcfg(env, cfg);
+}
+
 int
 dt_init(struct dt_env *env, struct comm_base* base)
 {
@@ -106,6 +106,13 @@ dt_create(struct config_file* cfg);
 void
 dt_apply_cfg(struct dt_env *env, struct config_file *cfg);

+/**
+ * Apply config settings for log enable for message types.
+ * @param env: dnstap environment object.
+ * @param cfg: new config settings.
+ */
+void dt_apply_logcfg(struct dt_env *env, struct config_file *cfg);
+
 /**
 * Initialize per-worker state in dnstap environment object.
 * @param env: dnstap environment object to initialize, created with dt_create().
@@ -1510,8 +1510,10 @@ void dtio_output_cb(int ATTR_UNUSED(fd), short bits, void* arg)
 #endif

 	if((bits&UB_EV_READ || dtio->ssl_brief_write)) {
+#ifdef HAVE_SSL
 		if(dtio->ssl_brief_write)
 			(void)dtio_disable_brief_write(dtio);
+#endif
 		if(dtio->ready_frame_sent && !dtio->accept_frame_received) {
 			if(dtio_read_accept_frame(dtio) <= 0)
 				return;
@@ -200,18 +200,25 @@ static void tap_data_list_try_to_free_tail(struct tap_data_list* list)
 }

 /** delete the tap structure */
-static void tap_data_free(struct tap_data* data)
+static void tap_data_free(struct tap_data* data, int free_tail)
 {
-	ub_event_del(data->ev);
-	ub_event_free(data->ev);
+	if(!data)
+		return;
+	if(data->ev) {
+		ub_event_del(data->ev);
+		ub_event_free(data->ev);
+	}
 #ifdef HAVE_SSL
 	SSL_free(data->ssl);
 #endif
-	close(data->fd);
+	sock_close(data->fd);
 	free(data->id);
 	free(data->frame);
-	data->data_list->d = NULL;
-	tap_data_list_try_to_free_tail(data->data_list);
+	if(data->data_list) {
+		data->data_list->d = NULL;
+		if(free_tail)
+			tap_data_list_try_to_free_tail(data->data_list);
+	}
 	free(data);
 }

@@ -237,7 +244,7 @@ static void tap_data_list_delete(struct tap_data_list* list)
 	while(e) {
 		next = e->next;
 		if(e->d) {
-			tap_data_free(e->d);
+			tap_data_free(e->d, 0);
 			e->d = NULL;
 		}
 		free(e);
@@ -260,7 +267,7 @@ static void tap_socket_close(struct tap_socket* s)
 {
 	if(!s) return;
 	if(s->fd == -1) return;
-	close(s->fd);
+	sock_close(s->fd);
 	s->fd = -1;
 }

@@ -339,7 +346,8 @@ static struct tap_socket* tap_socket_new_tlsaccept(char* ip,
 	s->fd = -1;
 	s->ev_cb = ev_cb;
 	s->data = data;
-	s->sslctx = listen_sslctx_create(server_key, server_cert, verifypem);
+	s->sslctx = listen_sslctx_create(server_key, server_cert, verifypem,
+		NULL, NULL, 0, 0, 0);
 	if(!s->sslctx) {
 		log_err("could not create ssl context");
 		free(s->ip);
@@ -822,7 +830,6 @@ static int reply_with_accept(struct tap_data* data)
 {
 #ifdef USE_DNSTAP
 	/* len includes the escape and framelength */
-	int r;
 	size_t len = 0;
 	void* acceptframe = fstrm_create_control_frame_accept(
 		DNSTAP_CONTENT_TYPE, &len);
@@ -833,6 +840,8 @@ static int reply_with_accept(struct tap_data* data)

 	fd_set_block(data->fd);
 	if(data->ssl) {
+#ifdef HAVE_SSL
+		int r;
 		if((r=SSL_write(data->ssl, acceptframe, len)) <= 0) {
 			int r2;
 			if((r2=SSL_get_error(data->ssl, r)) == SSL_ERROR_ZERO_RETURN)
@@ -843,6 +852,7 @@ static int reply_with_accept(struct tap_data* data)
 			free(acceptframe);
 			return 0;
 		}
+#endif
 	} else {
 		if(send(data->fd, acceptframe, len, 0) == -1) {
 			log_err("send failed: %s", sock_strerror(errno));
@@ -878,6 +888,7 @@ static int reply_with_finish(struct tap_data* data)

 	fd_set_block(data->fd);
 	if(data->ssl) {
+#ifdef HAVE_SSL
 		int r;
 		if((r=SSL_write(data->ssl, finishframe, len)) <= 0) {
 			int r2;
@@ -889,6 +900,7 @@ static int reply_with_finish(struct tap_data* data)
 			free(finishframe);
 			return 0;
 		}
+#endif
 	} else {
 		if(send(data->fd, finishframe, len, 0) == -1) {
 			log_err("send failed: %s", sock_strerror(errno));
@@ -988,7 +1000,7 @@ static int tap_handshake(struct tap_data* data)
 			return 0;
 		} else if(r == 0) {
 			/* closed */
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return 0;
 		} else if(want == SSL_ERROR_SYSCALL) {
 			/* SYSCALL and errno==0 means closed uncleanly */
@@ -1006,7 +1018,7 @@ static int tap_handshake(struct tap_data* data)
 			if(!silent)
 				log_err("SSL_handshake syscall: %s",
 					strerror(errno));
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return 0;
 		} else {
 			unsigned long err = ERR_get_error();
@@ -1016,7 +1028,7 @@ static int tap_handshake(struct tap_data* data)
 				verbose(VERB_OPS, "ssl handshake failed "
 					"from %s", data->id);
 			}
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return 0;
 		}
 	}
@@ -1024,7 +1036,7 @@ static int tap_handshake(struct tap_data* data)
 	data->ssl_handshake_done = 1;
 	if(!tap_check_peer(data)) {
 		/* closed */
-		tap_data_free(data);
+		tap_data_free(data, 1);
 		return 0;
 	}
 	return 1;
@@ -1050,7 +1062,7 @@ void dtio_tap_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void* arg)
 		if(verbosity>=4) log_info("s recv %d", (int)ret);
 		if(ret == 0) {
 			/* closed or error */
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return;
 		} else if(ret == -1) {
 			/* continue later */
@@ -1072,7 +1084,7 @@ void dtio_tap_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void* arg)
 			data->frame = calloc(1, data->len);
 			if(!data->frame) {
 				log_err("out of memory");
-				tap_data_free(data);
+				tap_data_free(data, 1);
 				return;
 			}
 		}
@@ -1085,7 +1097,7 @@ void dtio_tap_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void* arg)
 		if(verbosity>=4) log_info("f recv %d", (int)r);
 		if(r == 0) {
 			/* closed or error */
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return;
 		} else if(r == -1) {
 			/* continue later */
@@ -1110,13 +1122,13 @@ void dtio_tap_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(bits), void* arg)
 		data->is_bidirectional = 1;
 		if(verbosity) log_info("bidirectional stream");
 		if(!reply_with_accept(data)) {
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return;
 		}
 	} else if(data->len >= 4 && sldns_read_uint32(data->frame) ==
 		FSTRM_CONTROL_FRAME_STOP && data->is_bidirectional) {
 		if(!reply_with_finish(data)) {
-			tap_data_free(data);
+			tap_data_free(data, 1);
 			return;
 		}
 	}
@@ -1140,7 +1152,9 @@ void dtio_mainfdcallback(int fd, short ATTR_UNUSED(bits), void* arg)
 	char* id = NULL;
 	struct sockaddr_storage addr;
 	socklen_t addrlen = (socklen_t)sizeof(addr);
-	int s = accept(fd, (struct sockaddr*)&addr, &addrlen);
+	int s;
+	memset(&addr, 0, sizeof(addr));
+	s = accept(fd, (struct sockaddr*)&addr, &addrlen);
 	if(s == -1) {
 #ifndef USE_WINSOCK
 		/* EINTR is signal interrupt. others are closed connection. */
@@ -1396,6 +1410,41 @@ static int internal_unittest()
 	/* clean up */
 	tap_data_list_delete(socket->data_list);
 	free(socket);
+
+	/* Start again. Add two elements */
+	socket = calloc(1, sizeof(*socket));
+	log_assert(socket);
+	for(i=0; i<2; i++) {
+		datas[i] = calloc(1, sizeof(struct tap_data));
+		log_assert(datas[i]);
+		log_assert(tap_data_list_insert(&socket->data_list, datas[i]));
+	}
+	/* sanity base check */
+	list = socket->data_list;
+	for(i=0; list; i++) list = list->next;
+	log_assert(i==2);
+
+	/* Free the last data, tail cannot be erased */
+	list = socket->data_list;
+	while(list->next) list = list->next;
+	free(list->d);
+	list->d = NULL;
+	tap_data_list_try_to_free_tail(list);
+	list = socket->data_list;
+	for(i=0; list; i++) list = list->next;
+	log_assert(i==2);
+
+	/* clean up */
+	tap_data_list_delete(socket->data_list);
+	free(socket);
+
+	if(log_get_lock()) {
+		lock_basic_destroy((lock_basic_type*)log_get_lock());
+	}
+	checklock_stop();
+#ifdef USE_WINSOCK
+	WSACleanup();
+#endif
 	return 0;
 }

@@ -1497,8 +1546,8 @@ int main(int argc, char** argv)
 				usage(argv);
 		}
 	}
-	argc -= optind;
-	argv += optind;
+	/* argc -= optind; not using further arguments */
+	/* argv += optind; not using further arguments */

 	if(usessl) {
 #ifdef HAVE_SSL
@@ -1527,6 +1576,9 @@ int main(int argc, char** argv)
 	config_delstrlist(tcp_list.first);
 	config_delstrlist(tls_list.first);

+	if(log_get_lock()) {
+		lock_basic_destroy((lock_basic_type*)log_get_lock());
+	}
 	checklock_stop();
 #ifdef USE_WINSOCK
 	WSACleanup();
@@ -1734,3 +1786,33 @@ void remote_get_opt_ssl(char* ATTR_UNUSED(str), void* ATTR_UNUSED(arg))
 {
        log_assert(0);
 }
+
+void fast_reload_service_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+
+int fast_reload_client_callback(struct comm_point* ATTR_UNUSED(c),
+	void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
+        struct comm_reply* ATTR_UNUSED(repinfo))
+{
+	log_assert(0);
+	return 0;
+}
+
+#ifdef HAVE_NGTCP2
+void doq_client_event_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
+
+#ifdef HAVE_NGTCP2
+void doq_client_timer_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
@@ -1,3 +1,489 @@
+11 April 2025: Yorgos
+	- Merge #1265: Fix WSAPoll.
+
+10 April 2025: Wouter
+	- Fix for print of connection type in log-replies for dot and doh.
+
+9 April 2025: Wouter
+	- Fix to detect if atomic_store links in configure.
+	- Fix #1264: unbound 1.22.0 leaks memory when doing DoH.
+
+8 April 2025: Wouter
+	- Tag for 1.23.0rc1.
+	- Fix fast_reload to print chroot with config file name.
+
+7 April 2025: Yorgos
+	- Merge #902: DNS Error Reporting (RFC 9567). Introduces new
+	  configuration option 'dns-error-reporting' and new statistics for
+	  'num.dns_error_reports'.
+
+4 April 2025: Wouter
+	- Fix mesh_copy_client_info to omit null contents from copy.
+	- Fix comment name in the rpz nsdname test.
+	- Fix nettle compile for warnings and ticket keys.
+	- Fix redis_replica test for unused option defaults and log printout.
+	- Fix test to speed up common.sh script kill_pid.
+	- Fix to update common.sh for speed of kill_pid.
+
+4 April 2025: Yorgos
+	- Merge #1019: Redis read-only replica support.
+	  Introduces new 'redis-replica-*' options for the Redis cache backend.
+
+3 April 2025: Wouter
+	- Fix #1263: Exempt loopback addresses from wait-limit.
+	- Fix wait-limit-netblock and wait-limit-cookie-netblock config parse
+	  to allow two arguments.
+	- Fix ub_event and include dnstap and win_svc headers.
+	- Fix test for stat_values for wait limit defaults for localhost.
+	- Fix parameter unused warning in net_help.c.
+
+2 April 2025: Yorgos
+	- Merge #1262 from markyang92, fix build with
+	  'gcc-15 -Wbuiltin-declaration-mismatch' error in compat/malloc.c.
+	- For #1262, ifdef is no longer needed.
+
+2 April 2025: Wouter
+	- Fix unbound-control test so it counts the new flush_negative output,
+	  also answers the _ta probe from testns and prints command output
+	  and skip a thread specific test when no threads are available.
+	- Fix that ub_event has the facility to deal with callbacks for
+	  fast reload, doq, windows-stop and dnstap.
+	- Fix fast reload test to check if pid exists before acting on it.
+
+1 April 2025: Wouter
+	- Fix escape more characters when printing an RR type with an unquoted
+	  string.
+	- Enable the auth_tls.tdir and auth_tls_failcert.tdir tests.
+
+31 March 2025: Wouter
+	- iana portlist update.
+	- Merge #1042: Fast Reload. The unbound-control fast_reload is added.
+	  It reads changed config in a thread, then only briefly pauses the
+	  service threads, that keep running. DNS service is only interrupted
+	  briefly, less than a second.
+	- Skip the unit tests for auth_tls.tdir and auth_tls_failcert.tdir.
+
+27 March 2025: Wouter
+	- Fix unit test dname log printout typecast.
+	- Fix for ci test, expat is installed on the osx image.
+
+26 March 2025: Yorgos
+	- Fix #1255: Multiple pinnings to vulnerable copies of libexpat.
+	- For #1255, for ios use an older expat version that does not require
+	  C++11 language features.
+	- For #1255, for ios disable building tests that require C++11.
+	- For #1255, for ios try the latest expat version again.
+
+24 March 2025: Wouter
+	- Fix #1254: `send failed: Socket is not connected` and
+	  `remote address is 0.0.0.0 port 53`.
+
+21 March 2025: Wouter
+	- Fix #1253: Cache entries fail to be removed from Redis cachedb
+	  backend with unbound-control flush* +c.
+	- Fix for #1253: Fix for redis cachedb backend to expect an integer
+	  reply for the EXPIRE command.
+
+20 March 2025: Wouter
+	- Fix print of RR type NSAP-PTR, it is an unquoted string.
+
+18 March 2025: Wouter
+	- Fix #1251: WSAPoll first argument cannot be NULL.
+	- Fix for windows compile create ssl contexts.
+
+17 March 2025: Wouter
+	- Fix representation of types GPOS and RESINFO, add rdf type for
+	  unquoted str.
+
+16 March 2025: Yorgos
+	- Fix 'unbound-control flush_negative' when reporting removed data;
+	  reported by David 'eqvinox' Lamparter.
+
+28 February 2025: Wouter
+	- Merge #1238: Prefer SOURCE_DATE_EPOCH over actual time.
+	  Add --help output description for the SOURCE_DATE_EPOCH variable.
+
+25 February 2025: Wouter
+	- Merge #1243: Do not shadow tm on line 236.
+
+24 February 2025: Yorgos
+	- Fix hash calculation for cachedb to ignore case. Previously, cached
+	  records there were only relevant for same case queries (if not
+	  already in Unbound's internal cache).
+
+19 February 2025: Yorgos
+	- Fix static analysis report about unhandled EOF on error conditions
+	  when reading anchor key files.
+	- Merge #1241: Fix infra-keep-probing for low infra-cache-max-rtt
+	  values.
+
+17 February 2025: Yorgos
+	- Consider reconfigurations when calculating the still_useful_timeout
+	  for servers in the infrastructure cache.
+
+30 January 2025: Wouter
+	- Fix #986: Resolving sas.com with dnssec-validation fails though
+	  signed delegations seem to be (mostly) correct.
+
+29 January 2025: Yorgos
+	- Make the default value of module-config "validator iterator"
+	  regardless of compilation options. --enable-subnet would implicitly
+	  change the value to enable the subnetcache module by default in the
+	  past.
+
+24 January 2025: Yorgos
+	- Merge #1220 from Petr Menšík, Add unbound members group access to
+	  control key.
+
+21 January 2025: Yorgos
+	- Use the same interface listening port discovery code for all needed
+	  protocols.
+	- Port to string only when needed before getaddrinfo().
+	- Do not open unencrypted channels next to encrypted ones on the same
+	  port.
+	- Merge #1224 from Theo Buehler: Do not use DSA API unless USE_DSA is
+	  set.
+
+21 January 2025: Wouter
+	- Fix compile of interface check code when dnscrypt or quic is
+	  disabled.
+	- Fix encoding of RR type ATMA.
+	- Fix to check length in ATMA string to wire.
+	- Merge #1229: check before use daemon->shm_info.
+
+20 January 2025: Yorgos
+	- Merge #1222: Unique DoT and DoH SSL contexts to allow for different
+	  ALPN.
+	- Create the quic SSL listening context only when needed.
+
+15 January 2025: Yorgos
+	- Merge #1221: Consider auth zones when checking for forwarders.
+
+14 January 2025: Yorgos
+	- Add resolver.arpa and service.arpa to the default locally served
+	  zones.
+
+13 January 2025: Yorgos
+	- Fix #1213: Misleading error message on default access control causing
+	  refuse.
+
+10 January 2025: Yorgos
+	- Merge #1214: Use TCP_NODELAY on TLS sockets to speed up the TLS
+	  handshake.
+
+31 December 2024: Yorgos
+	- Merge #1174: Serve expired cache update fixes. Fixes a regression bug
+	  with serve-expired that appeared in 1.22.0 and would not allow the
+	  iterator to update the cache with not-yet-validated entries resulting
+	  in increased outgoing traffic.
+
+20 December 2024: Yorgos
+	- For #1207: [FR] Support for RESINFO RRType 261 (RFC9606), add
+	  LDNS_RR_TYPE_RESINFO similar to LDNS_RR_TYPE_TXT.
+
+13 December 2024: Yorgos
+	- Merge #1204: ci: set persist-credentials: false for actions/checkout
+	  per zizmor suggestion.
+
+3 December 2024: Yorgos
+	- Merge #1189: Fix the dname_str method to cause conversion errors
+	  when the domain name length is 255.
+	- Merge #1197: dname_str() fixes.
+	- For #1175, the default value of serve-expired-ttl is set to 86400
+	  (1 day) as suggested by RFC8767.
+	- Merge #1198: Fix log-servfail with serve expired and no useful cache
+	  contents.
+	- Safeguard alias loop while looking in the cache for expired answers.
+	- Merge #1187: Create the SSL_CTX for QUIC before chroot and privilege
+	  drop.
+	- Fix typo in log_servfail.tdir test.
+
+22 November 2024: Yorgos
+	- Fix #1175: serve-expired does not adhere to secure-by-default
+	  principle. The default value of serve-expired-client-timeout
+	  is set to 1800 as suggested by RFC8767.
+	- For #1175, update serve-expired tests.
+
+20 November 2024: Yorgos
+	- Fix comparison to help static analyzer.
+
+19 November 2024: Yorgos
+	- Merge #1169 from Sergey Kacheev, fix: lock-free counters for
+	  auth_zone up/down queries.
+
+15 November 2024: Wouter
+	- Fix #1183: the data being used is released in method
+	  nsec3_hash_test_entry.
+	- Fix for #1183: release nsec3 hashes per test file.
+
+8 November 2024: Yorgos
+	- More descriptive text for 'harden-algo-downgrade'.
+	- Complete fix for max-global-quota to 200.
+
+6 November 2024: Yorgos
+	- Increase the default of max-global-quota to 200 from 128 after
+	  operational feedback. Still keeping the possible amplification
+	  factor (CAMP related issues) in the hundreds.
+
+5 November 2024: Wouter
+	- Fix for the serve expired DNSSEC information fix, it would not allow
+	  current delegation information be updated in cache. The fix allows
+	  current delegation and validation recursion information to be
+	  updated, but as a consequence no longer has certain expired
+	  information around for later dnssec valid expired responses.
+	- Fix to log redis timeout error string on failure.
+
+5 November 2024: Yorgos
+	- Fix SETEX check during Redis (re)initialization.
+
+4 November 2024: Wouter
+	- Fix redis that during a reload it does not fail if the redis
+	  server does not connect or does not respond. It still logs the
+	  errors and if the server is up checks expiration features.
+	- Merge #1167: Makefile.in: fix occasional parallel build failures
+	  around bison rule.
+
+1 November 2024: Yorgos
+	- Merge #1159: Stats for discard-timeout and wait-limit.
+	- Add test case for #1159.
+	- Some clean up for stat_values.test.
+	- Merge #1170 from Melroy van den Berg, Fix chroot manpage
+	  description.
+	- Merge #1157 from Liang Zhu, Fix heap corruption when calling
+	  ub_ctx_delete in Windows.
+
+25 October 2024: Yorgos
+	- Fix #1163: Typos in unbound.conf documentation.
+
+17 October 2024: Wouter
+	- Tag for 1.22.0 release. This did not contain the 1154 fix
+	  from 16 oct. The code repository continues with
+	  version 1.22.1 in development.
+
+16 October 2024: Yorgos
+	- Fix for dnsoverquic and dnstap to use the correct dnstap
+	  environment.
+
+16 October 2024: Wouter
+	- Fix for dnstap with dnscrypt and dnstap without dnsoverquic.
+	- Fix #1154: Tag Incorrectly Applying for Other Interfaces
+	  Using the Same IP. This fix is not for 1.22.0.
+
+14 October 2024: Wouter
+	- Fix to display warning if quic-port is set but dnsoverquic is not
+	  enabled when compiled.
+	- Fix dnsoverquic to extend the number of streams when one is closed.
+
+11 October 2024: Wouter
+	- Fix to disable detection of quic configured ports when quic is
+	  not compiled in.
+	- Fix harden-unverified-glue for AAAA cache_fill_missing lookups.
+	- Fix contrib/aaaa-filter-iterator.patch for change in call
+	  signature for cache_fill_missing.
+
+10 October 2024: Wouter
+	- Fix cookie_file test sporadic fails for time change during
+	  the test.
+	- Fix add reallocarray to alloc stats unit test, and disable
+	  override of strdup in unbound-host, and the result of config
+	  get option is freed properly.
+	- Tag for 1.22.0rc1.
+
+9 October 2024: Wouter
+	- Merge #871: DNS over QUIC. This adds `quic-port: 853` and
+	  `quic-size: 8m` that enable dnsoverquic, and the counters
+	  `num.query.quic` and `mem.quic` in the statistics output.
+	  The feature needs to be enabled by compiling with libngtcp2,
+	  with `--with-libngtcp2=path` and libngtcp2 needs openssl+quic,
+	  pass that with `--with-ssl=path` to compile unbound as well.
+	- Fix to limit NSEC TTL for messages from cachedb. Fix to limit the
+	  prefetch ttl for messages after a CNAME with short TTL.
+	- Fix for dnstap compile of doqclient with doq disabled.
+
+8 October 2024: Wouter
+	- Fix #1149: unbound-control-setup hangs sometimes depending on
+	  the openssl version.
+	- Fix #1128: Cannot override tcp-upstream and tls-upstream with
+	  forward-tcp-upstream and forward-tls-upstream.
+
+3 October 2024: Yorgos
+	- Fix CVE-2024-8508, unbounded name compression could lead to denial
+	  of service.
+	- This fix was part of 1.21.1, a security point release on 1.21.0.
+	  The code repository continues with this fix and the version number
+	  1.22.0.
+
+30 September 2024: Wouter
+	- Fix negative cache NSEC3 parameter compares for zero length NSEC3
+	  salt.
+	- Fix unbound dnstap socket test program analyzer warnings about
+	  unused variable assignments and variable initialization.
+
+25 September 2024: Wouter
+	- Fix #1144: [FR] log timestamps in ISO8601 format with timezone.
+	  This adds the option `log-time-iso: yes` that logs in ISO8601
+	  format.
+
+24 September 2024: Yorgos
+	- Attempt to further fix doh_downstream_buffer_size.tdir flakiness.
+	- More clear text for prefetch and minimal-responses in the
+	  unbound.conf man page.
+	- Merge #1143: Fix cache update when serve expired is used. Expired
+	  records are favored over resolution and validation failures when
+	  serve-expired is used.
+
+23 September 2024: Wouter
+	- Fix dns64 with prefetch that the prefetch is stored in cache.
+
+23 September 2024: Yorgos
+	- Fix doxygen warnings by commenting out CLANG_ASSISTED_PARSING,
+	  CLANG_ADD_INC_PATHS, CLANG_OPTIONS and CLANG_DATABASE_PATH; they were
+	  already disabled.
+
+17 September 2024: Wouter
+	- Add redis-command-timeout: 20 and redis-connect-timeout: 200,
+	  that can set the timeout separately for commands and the
+	  connection set up to the redis server. If they are not
+	  specified, the redis-timeout value is used.
+
+16 September 2024: Wouter
+	- Merge #1140: Fix spelling mistake in comments.
+
+11 September 2024: Yorgos
+	- Fix and add comments in testdata/val_negcache_ttl.rpl.
+
+10 September 2024: Wouter
+	- Fix to limit NSEC and NSEC3 TTL when aggressive nsec is
+	  enabled (RFC9077).
+	- Add unit test for ttl limit for aggressive nsec.
+
+6 September 2024: Yorgos
+	- Fix alloc-size and calloc-transposed-args compiler warnings.
+	- Fix comment to not trigger doxygen unknown command.
+
+5 September 2024: Wouter
+	- Fix config file read for dnstap-sample-rate.
+
+2 September 2024: Wouter
+	- Merge #1135: Add new IANA trust anchor.
+
+30 August 2024: Wouter
+	- Merge #1132: b.root renumbering.
+	- Fix for #1132, adjusted unit test for change in the test file.
+	- Fix for #1132, comment about adjusted copy of reference check.
+
+29 August 2024: Wouter
+	- Unit test for auth zone transfer TLS, and TLS failure.
+	- Fix to print port number in logs for auth zone transfer activities.
+
+28 August 2024: Wouter
+	- Fix that when rpz is applied the message does not get picked up by
+	  the validator. That stops validation failures for the message.
+	- Fix that stub-zone and forward-zone clauses do not exhaust memory
+	  for long content.
+
+27 August 2024: Wouter
+	- Fix #1130: Loads of logs: "validation failure: key for validation
+	  <domain>. is marked as invalid because of a previous" for
+	  non-DNSSEC signed zone.
+
+23 August 2024: Wouter
+	- Merge patch to fix for glue that is outside of zone, with
+	  `harden-unverified-glue`, from Karthik Umashankar (Microsoft).
+	  Enabling this option protects the Unbound resolver against bad
+	  glue, that is unverified out of zone glue, by resolving them.
+	  It uses the records as last resort if there is no other working
+	  glue.
+	- Fix #1127: error: "memory exhausted" when defining more than 9994
+	  local-zones.
+	- Fix documentation for cache_fill_missing function.
+
+21 August 2024: Wouter
+	- Add cross platform freebsd, openbsd and netbsd to github ci.
+	- Fix for char signedness warnings on NetBSD.
+
+20 August 2024: Wouter
+	- Add iter-scrub-ns, iter-scrub-cname and max-global-quota
+	  configuration options.
+
+19 August 2024: Wouter
+	- Fix #1126: unbound-control-setup hangs while testing for openssl
+	  presence starting from version 1.21.0.
+
+9 August 2024: Wouter
+	- Fix spelling for the cache-min-negative-ttl entry in the
+	  example.conf.
+	- Tag for release 1.21.0, the repository continues with 1.21.1
+	  in development.
+
+8 August 2024: Wouter
+	- Fix CAMP issues with global quota. Thanks to Huayi Duan, Marco
+	  Bearzi, Jodok Vieli, and Cagin Tanir from NetSec group, ETH Zurich.
+	- Fix CacheFlush issues with limit on NS RRs. Thanks to Yehuda Afek,
+	  Anat Bremler-Barr, Shoham Danino and Yuval Shavitt (Tel-Aviv
+	  University and Reichman University).
+	- Set version number to 1.21.0 for release. This has tag 1.21.0rc1.
+	- Fix that for windows the module startup is called and sets up
+	  the module-config.
+
+2 August 2024: Wouter
+	- Fix that alloc stats has strdup checks, it stops debuggers from
+	  complaining about mismatch at free time.
+	- Fix testbound for alloc stats strdup in util/alloc.c.
+	- Merge #1090: Cookie secret file. Adds
+	  `cookie-secret-file: "unbound_cookiesecrets.txt"` option to store
+	  cookie secrets for EDNS COOKIE secret rollover. The remote control
+	  add_cookie_secret, activate_cookie_secret and drop_cookie_secret
+	  commands can be used for rollover, the command print_cookie_secrets
+	  shows the values in use.
+	- Fix that alloc stats for forwards and hints are printed, and when
+	  alloc stats is enabled, the unit test for unbound control waits for
+	  reloads to complete.
+
+1 August 2024: Wouter
+	- Fix dnstap test program, cleans up to have clean memory on exit,
+	  for tap_data_free, does not delete NULL items. Also it does not try
+	  to free the tail, specifically in the free of the list since that
+	  picked up the next item in the list for its loop causing invalid
+	  free. Added internal unit test to unbound-dnstap-socket for that.
+	- Fix that the worker mem report with alloc stats does not attempt
+	  to print memory use of forwards and hints if they have been
+	  deleted already.
+
+31 July 2024: Wouter
+	- Fix for #1114: Fix that cache fill for forward-host names is
+	  performed, so that with nonzero target-fetch-policy it fetches
+	  forwarder addresses and uses them from cache. Also updated that
+	  delegation point cache fill routines use CDflag for AAAA message
+	  lookups, so that its negative lookup stops a recursion since the
+	  cache uses the bit for disambiguation for dns64 but the recursion
+	  uses CDflag for the AAAA target lookups, so the check correctly
+	  stops a useless recursion by its cache lookup.
+
+30 July 2024: Wouter
+	- Fix to document parameters of auth_zone_verify_zonemd_with_key.
+
+25 July 2024: Wouter
+	- Add root key 38696 from 2024 for DNSSEC validation. It is added
+	  to the default root keys in unbound-anchor. The content can be
+	  inspected with `unbound-anchor -l`.
+
+23 July 2024: Yorgos
+	- Fix #1106: ratelimit-below-domain logs the wrong FROM address.
+	- Cleanup ede.tdir test.
+	- For #935 and #1104, clarify RPZ order and semantics.
+
+23 July 2024: Wouter
+	- Merge #1110: Make fallthrough explicit for libworker.c.
+	- For #1110: Test for fallthrough attribute in configure and add
+	  fallthrough attribute annotations.
+	- Fix compile when the compiler does not support the noreturn
+	  attribute.
+	- Fix to have empty definition when not supported for weak attribute.
+	- Fix uninitialized variable warning in create_tcp_accept_sock.
+	- Fix link of dnstap without openssl.
+	- Fix link of unbound-dnstap-socket without openssl.
+
 19 July 2024: Wouter
 	- Add dnstap-sample-rate that logs only 1/N messages, for high volume
 	  server environments. Thanks Dan Luther.
@@ -187,6 +187,15 @@ server:
 	# query upon encountering a CNAME record.
 	# max-query-restarts: 11

+	# Limit on number of NS records in NS RRset for incoming packets.
+	# iter-scrub-ns: 20
+
+	# Limit on number of CNAME, DNAME records for incoming packets.
+	# iter-scrub-cname: 11
+
+	# Limit on upstream queries for an incoming query and its recursion.
+	# max-global-quota: 200
+
 	# msec for waiting for an unknown server to reply.  Increase if you
 	# are behind a slow satellite link, to eg. 1128.
 	# unknown-server-time-limit: 376
@@ -206,6 +215,12 @@ server:
 	# Apart from the default, the wait limit with cookie can be adjusted.
 	# wait-limit-cookie-netblock: 192.0.2.0/24 50000

+	# Defaults for loopback, it has no wait limit.
+	# wait-limit-netblock: 127.0.0.0/8 -1
+	# wait-limit-netblock: ::1/128 -1
+	# wait-limit-cookie-netblock: 127.0.0.0/8 -1
+	# wait-limit-cookie-netblock: ::1/128 -1
+
 	# the amount of memory to use for the RRset cache.
 	# plain value in bytes or you can append k, m or G. default is "4Mb".
 	# rrset-cache-size: 4m
@@ -228,7 +243,7 @@ server:

 	# the time to live (TTL) value lower bound, in seconds. Default 0.
 	# For negative responses in the cache. If disabled, default,
-	# cache-min-tll applies if configured.
+	# cache-min-ttl applies if configured.
 	# cache-min-negative-ttl: 0

 	# the time to live (TTL) value for cached roundtrip times, lameness and
@@ -452,6 +467,10 @@ server:
 	# print UTC timestamp in ascii to logfile, default is epoch in seconds.
 	# log-time-ascii: no

+	# log timestamp in ISO8601 format if also log-time-ascii is enabled.
+	# (y-m-dTh:m:s.msec[+-]tzhours:tzminutes)
+	# log-time-iso: no
+
 	# print one line with time, IP, name, type, class for every query.
 	# log-queries: no

@@ -524,6 +543,9 @@ server:
 	# Harden against out of zone rrsets, to avoid spoofing attempts.
 	# harden-glue: yes

+	# Harden against unverified (outside-zone, including sibling zone) glue rrsets
+	# harden-unverified-glue: no
+
 	# Harden against receiving dnssec-stripped data. If you turn it
 	# off, failing to validate dnskey data for a trustanchor will
 	# trigger insecure mode for that zone (like without a trustanchor).
@@ -540,8 +562,9 @@ server:
 	# harden-referral-path: no

 	# Harden against algorithm downgrade when multiple algorithms are
-	# advertised in the DS record.  If no, allows the weakest algorithm
-	# to validate the zone.
+	# advertised in the DS record.  If no, allows any algorithm
+	# to validate the zone which is the standard behavior for validators.
+	# Check the manpage for detailed information.
 	# harden-algo-downgrade: no

 	# Harden against unknown records in the authority section and the
@@ -714,12 +737,13 @@ server:
 	# disable-edns-do: no

 	# Serve expired responses from cache, with serve-expired-reply-ttl in
-	# the response, and then attempt to fetch the data afresh.
+	# the response. By default it first tries to refresh an expired answer.
+	# Can be configured with serve-expired-client-timeout.
 	# serve-expired: no
 	#
 	# Limit serving of expired responses to configured seconds after
 	# expiration. 0 disables the limit.
-	# serve-expired-ttl: 0
+	# serve-expired-ttl: 86400
 	#
 	# Set the TTL of expired records to the serve-expired-ttl value after a
 	# failed attempt to retrieve the record from upstream. This makes sure
@@ -732,10 +756,9 @@ server:
 	#
 	# Time in milliseconds before replying to the client with expired data.
 	# This essentially enables the serve-stale behavior as specified in
-	# RFC 8767 that first tries to resolve before
-	# immediately responding with expired data.  0 disables this behavior.
-	# A recommended value is 1800.
-	# serve-expired-client-timeout: 0
+	# RFC 8767 that first tries to resolve before immediately responding
+	# with expired data.  0 disables this behavior.
+	# serve-expired-client-timeout: 1800

 	# Return the original TTL as received from the upstream name server rather
 	# than the decrementing TTL as stored in the cache.  Enabling this feature
@@ -794,6 +817,8 @@ server:
 	# local-zone: "127.in-addr.arpa." nodefault
 	# local-zone: "1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa." nodefault
 	# local-zone: "home.arpa." nodefault
+	# local-zone: "resolver.arpa." nodefault
+	# local-zone: "service.arpa." nodefault
 	# local-zone: "onion." nodefault
 	# local-zone: "test." nodefault
 	# local-zone: "invalid." nodefault
@@ -904,6 +929,7 @@ server:
 	# tls-service-pem: "path/to/publiccertfile.pem"
 	# tls-port: 853
 	# https-port: 443
+	# quic-port: 853

 	# cipher setting for TLSv1.2
 	# tls-ciphers: "DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256"
@@ -968,6 +994,9 @@ server:
 	# Disable TLS for DNS-over-HTTP downstream service.
 	# http-notls-downstream: no

+	# Maximum number of bytes used for QUIC buffers.
+	# quic-size: 8m
+
 	# The interfaces that use these listed port numbers will support and
 	# expect PROXYv2. For UDP and TCP/TLS interfaces.
 	# proxy-protocol-port: portno for each of the port numbers.
@@ -1044,6 +1073,11 @@ server:
 	# example value "000102030405060708090a0b0c0d0e0f".
 	# cookie-secret: <128 bit random hex string>

+	# File with cookie secrets, the 'cookie-secret:' option is ignored
+	# and the file can be managed to have staging and active secrets
+	# with remote control commands. Disabled with "". Default is "".
+	# cookie-secret-file: "/usr/local/etc/unbound_cookiesecrets.txt"
+
 	# Enable to attach Extended DNS Error codes (RFC8914) to responses.
 	# ede: no

@@ -1052,6 +1086,11 @@ server:
 	# Note that the ede option above needs to be enabled for this to work.
 	# ede-serve-expired: no

+	# Enable DNS Error Reporting (RFC9567).
+	# qname-minimisation is advised to be turned on as well to increase
+	# privacy on the outgoing reports.
+	# dns-error-reporting: no
+
 	# Specific options for ipsecmod. Unbound needs to be configured with
 	# --enable-ipsecmod for these to take effect.
 	#
@@ -1279,15 +1318,35 @@ remote-control:
 #     # redis server's TCP port
 #     redis-server-port: 6379
 #     # if the server uses a unix socket, set its path, or "" when not used.
-#     # redis-server-path: "/var/lib/redis/redis-server.sock"
+#     redis-server-path: "/var/lib/redis/redis-server.sock"
 #     # if the server uses an AUTH password, specify here, or "" when not used.
-#     # redis-server-password: ""
+#     redis-server-password: ""
 #     # timeout (in ms) for communication with the redis server
 #     redis-timeout: 100
+#     # timeout (in ms) for commands, if 0, uses redis-timeout.
+#     redis-command-timeout: 0
+#     # timeout (in ms) for connection set up, if 0, uses redis-timeout.
+#     redis-connect-timeout: 0
 #     # set timeout on redis records based on DNS response TTL
 #     redis-expire-records: no
 #     # redis logical database to use, 0 is the default database.
 #     redis-logical-db: 0
+#     # redis replica server's IP address or host name
+#     redis-replica-server-host: 127.0.0.1
+#     # redis replica server's TCP port
+#     redis-replica-server-port: 6379
+#     # if the replica server uses a unix socket, set its path, or "" when not used.
+#     redis-replica-server-path: "/var/lib/redis/redis-server.sock"
+#     # if the replica server uses an AUTH password, specify here, or "" when not used.
+#     redis-replica-server-password: ""
+#     # timeout (in ms) for communication with the redis replica server
+#     redis-replica-timeout: 100
+#     # timeout (in ms) for redis replica commands, if 0, uses redis-replica-timeout.
+#     redis-replica-command-timeout: 0
+#     # timeout (in ms) for redis replica connection set up, if 0, uses redis-replica-timeout.
+#     redis-replica-connect-timeout: 0
+#     # redis logical database to use for the replica server, 0 is the default database.
+#     redis-replica-logical-db: 0

 # IPSet
 # Add specify domain into set via ipset.
@@ -1339,7 +1398,8 @@ remote-control:
 # 	dnstap-log-forwarder-response-messages: no

 # Response Policy Zones
-# RPZ policies. Applied in order of configuration. QNAME, Response IP
+# RPZ policies. Applied in order of configuration. Any match from an earlier
+# RPZ zone will terminate the RPZ lookup. QNAME, Response IP
 # Address, nsdname, nsip and clientip triggers are supported. Supported
 # actions are: NXDOMAIN, NODATA, PASSTHRU, DROP, Local Data, tcp-only
 # and drop.  Policies can be loaded from a file, or using zone
@@ -60,6 +60,155 @@ Reload the server but try to keep the RRset and message cache if
 That means the caches sizes and the number of threads must not change between
 reloads.
 .TP
+.B fast_reload \fR[\fI+dpv\fR]
+Reload the server, but keep downtime to a minimum, so that user queries
+keep seeing service. This needs the code compiled with threads. The config
+is loaded in a thread, and prepared, then it briefly pauses the existing
+server and updates config options. The intent is that the pause does not
+impact the service of user queries. The cache is kept. Also user queries
+worked on are kept and continue, but with the new config options.
+.IP
+This command is experimental at this time.
+.IP
+The amount of temporal memory needed during a fast_reload is twice the
+amount needed for configuration.
+This is because Unbound temporarily needs to store both current configuration
+values and new ones while trying to fast_reload.
+Zones loaded from disk (authority zones and RPZ zones) are included in such
+memory needs.
+.IP
+Options that can be changed are for
+forwards,
+stubs,
+views,
+authority zones,
+RPZ zones and
+local zones.
+.IP
+Also
+access-control and similar options,
+interface-action and similar options and
+tcp-connection-limit.
+It can reload some
+define-tag
+changes, more on that below.
+Further options include
+insecure-lan-zones,
+domain-insecure,
+trust-anchor-file,
+trust-anchor,
+trusted-keys-file,
+auto-trust-anchor-file,
+edns-client-string,
+ipset,
+log-identity,
+infra-cache-numhosts,
+msg-cache-size,
+rrset-cache-size,
+key-cache-size,
+ratelimit-size,
+neg-cache-size,
+num-queries-per-thread,
+jostle-timeout,
+use-caps-for-id,
+unwanted-reply-threshold,
+tls-use-sni,
+outgoing-tcp-mss,
+ip-dscp,
+max-reuse-tcp-queries,
+tcp-reuse-timeout,
+tcp-auth-query-timeout,
+delay-close.
+.IP
+It does not work with
+interface and
+outgoing-interface changes,
+also not with
+remote control,
+outgoing-port-permit,
+outgoing-port-avoid,
+msg-buffer-size,
+any **\*-slabs** options and
+statistics-interval changes.
+.IP
+For dnstap these options can be changed:
+dnstap-log-resolver-query-messages,
+dnstap-log-resolver-response-messages,
+dnstap-log-client-query-messages,
+dnstap-log-client-response-messages,
+dnstap-log-forwarder-query-messages and
+dnstap-log-forwarder-response-messages.
+.IP
+It does not work with these options:
+dnstap-enable,
+dnstap-bidirectional,
+dnstap-socket-path,
+dnstap-ip,
+dnstap-tls,
+dnstap-tls-server-name,
+dnstap-tls-cert-bundle,
+dnstap-tls-client-key-file and
+dnstap-tls-client-cert-file.
+.IP
+The options
+dnstap-send-identity,
+dnstap-send-version,
+dnstap-identity, and
+dnstap-version can be loaded
+when ``+p`` is not used.
+.IP
+The '+v' option makes the output verbose which includes the time it took to do
+the reload.
+With '+vv' it is more verbose which includes the amount of memory that was
+allocated temporarily to perform the reload; this amount of memory can be big
+if the config has large contents.
+In the timing output the 'reload' time is the time during which the server was
+paused.
+.IP
+The '+p' option makes the reload not pause threads, they keep running.
+Locks are acquired, but items are updated in sequence, so it is possible
+for threads to see an inconsistent state with some options from the old
+and some options from the new config, such as cache TTL parameters from the
+old config and forwards from the new config. The stubs and forwards are
+updated at the same time, so that they are viewed consistently, either old
+or new values together. The option makes the reload time take eg. 3
+microseconds instead of 0.3 milliseconds during which the worker threads are
+interrupted. So, the interruption is much shorter, at the expense of some
+inconsistency. After the reload itself, every worker thread is briefly
+contacted to make them release resources, this makes the delete timing
+a little longer, and takes up time from the remote control servicing
+worker thread.
+.IP
+With the nopause option, the reload does not work to reload some options,
+that fast reload works on without the nopause option: val-bogus-ttl,
+val-override-date, val-sig-skew-min, val-sig-skew-max, val-max-restart,
+val-nsec3-keysize-iterations, target-fetch-policy, outbound-msg-retry,
+max-sent-count, max-query-restarts, do-not-query-address,
+do-not-query-localhost, private-address, private-domain, caps-exempt,
+nat64-prefix, do-nat64, infra-host-ttl, infra-keep-probing, ratelimit,
+ip-ratelimit, ip-ratelimit-cookie, wait-limit-netblock,
+wait-limit-cookie-netblock, ratelimit-below-domain, ratelimit-for-domain.
+.IP
+The '+d' option makes the reload drop queries that the worker threads are
+working on. This is like flush_requestlist. Without it the queries are kept
+so that users keep getting answers for those queries that are currently
+processed. The drop makes it so that queries during the life time of the
+query processing see only old, or only new config options.
+.IP
+When there are changes to the config tags, from the \fBdefine\-tag\fR option,
+then the '+d' option is implicitly turned on with a warning printout, and
+queries are dropped.
+This is to stop references to the old tag information, by the old
+queries. If the number of tags is increased in the newly loaded config, by
+adding tags at the end, then the implicit '+d' option is not needed.
+.IP
+For response ip, that is actions associated with IP addresses, and perhaps
+intersected with access control tag and action information, those settings
+are stored with a query when it comes in based on its source IP address.
+The old information is kept with the query until the queries are done.
+This is gone when those queries are resolved and finished, or it is possible
+to flush the requestlist with '+d'.
+.TP
 .B verbosity \fInumber
 Change verbosity value for logging. Same values as \fBverbosity\fR keyword in
 \fIunbound.conf\fR(5).  This new setting lasts until the server is issued
@@ -350,6 +499,41 @@ Remove a list of \fIlocal_data\fR for given view from stdin. Like local_datas_re
 .TP
 .B view_local_datas \fIview\fR
 Add a list of \fIlocal_data\fR for given view from stdin.  Like local_datas.
+.TP
+.B add_cookie_secret <secret>
+Add or replace a cookie secret persistently. <secret> needs to be an 128 bit
+hex string.
+.IP
+Cookie secrets can be either \fIactive\fR or \fIstaging\fR. \fIActive\fR cookie
+secrets are used to create DNS Cookies, but verification of a DNS Cookie
+succeeds with any of the \fIactive\fR or \fIstaging\fR cookie secrets. The
+state of the current cookie secrets can be printed with the
+\fBprint_cookie_secrets\fR command.
+.IP
+When there are no cookie secrets configured yet, the <secret> is added as
+\fIactive\fR. If there is already an \fIactive\fR cookie secret, the <secret>
+is added as \fIstaging\fR or replacing an existing \fIstaging\fR secret.
+.IP
+To "roll" a cookie secret used in an anycast set. The new secret has to be
+added as staging secret to \fBall\fR nodes in the anycast set. When \fBall\fR
+nodes can verify DNS Cookies with the new secret, the new secret can be
+activated with the \fBactivate_cookie_secret\fR command. After \fBall\fR nodes
+have the new secret \fIactive\fR for at least one hour, the previous secret can
+be dropped with the \fBdrop_cookie_secret\fR command.
+.IP
+Persistence is accomplished by writing to a file which if configured with the
+\fBcookie\-secret\-file\fR option in the server section of the config file.
+This is disabled by default, "".
+.TP
+.B drop_cookie_secret
+Drop the \fIstaging\fR cookie secret.
+.TP
+.B activate_cookie_secret
+Make the current \fIstaging\fR cookie secret \fIactive\fR, and the current
+\fIactive\fR cookie secret \fIstaging\fR.
+.TP
+.B print_cookie_secrets
+Show the current configured cookie secrets with their status.
 .SH "EXIT CODE"
 The unbound\-control program exits with status code 1 on error, 0 on success.
 .SH "SET UP"
@@ -387,6 +571,12 @@ number of queries with a client part only DNS Cookie by thread
 .I threadX.num.queries_cookie_invalid
 number of queries with an invalid DNS Cookie by thread
 .TP
+.I threadX.num.queries_discard_timeout
+number of queries removed due to discard-timeout by thread
+.TP
+.I threadX.num.queries_wait_limit
+number of queries removed due to wait-limit by thread
+.TP
 .I threadX.num.cachehits
 number of queries that were successfully answered using a cache lookup
 .TP
@@ -406,6 +596,9 @@ request for certificates.
 .I threadX.num.dnscrypt.malformed
 number of request that were neither cleartext, not valid dnscrypt messages.
 .TP
+.I threadX.num.dns_error_reports
+number of DNS Error Reports generated by thread
+.TP
 .I threadX.num.prefetch
 number of cache prefetches performed.  This number is included in
 cachehits, as the original query had the unprefetched answer from cache,
@@ -476,6 +669,12 @@ summed over threads.
 .I total.num.queries_cookie_invalid
 summed over threads.
 .TP
+.I total.num.queries_discard_timeout
+summed over threads.
+.TP
+.I total.num.queries_wait_limit
+summed over threads.
+.TP
 .I total.num.cachehits
 summed over threads.
 .TP
@@ -494,6 +693,9 @@ summed over threads.
 .I total.num.dnscrypt.malformed
 summed over threads.
 .TP
+.I total.num.dns_error_reports
+summed over threads.
+.TP
 .I total.num.prefetch
 summed over threads.
 .TP
@@ -571,6 +773,10 @@ queries waiting for request stream completion.
 Memory in bytes used by the HTTP/2 response buffers. Containing DNS responses
 waiting to be written back to the clients.
 .TP
+.I mem.quic
+Memory in bytes used by QUIC. Containing connection information, stream
+information, queries read and responses written back to the clients.
+.TP
 .I histogram.<sec>.<usec>.to.<sec>.<usec>
 Shows a histogram, summed over all threads. Every element counts the
 recursive queries whose reply time fit between the lower and upper bound.
@@ -619,6 +825,10 @@ Number of queries that were made using HTTPS towards the Unbound server.
 These are also counted in num.query.tcp and num.query.tls, because HTTPS
 uses TLS and TCP.
 .TP
+.I num.query.quic
+Number of queries that were made using QUIC towards the Unbound server.
+These are also counted in num.query.tls, because TLS is used for these queries.
+.TP
 .I num.query.ipv6
 Number of queries that were made using IPv6 towards the Unbound server.
 .TP
@@ -326,11 +326,15 @@ The wait limit for the netblock. If not given the wait\-limit value is
 used. The most specific netblock is used to determine the limit. Useful for
 overriding the default for a specific, group or individual, server.
 The value -1 disables wait limits for the netblock.
+By default the loopback has a wait limit netblock of -1, it is not limited,
+because it is separated from the rest of network for spoofed packets.
+The loopback addresses 127.0.0.0/8 and ::1/128 are default at -1.
 .TP
 .B wait\-limit\-cookie\-netblock: \fI<netblock> <number>
 The wait limit for the netblock, when the query has a DNS cookie.
 If not given, the wait\-limit\-cookie value is used.
 The value -1 disables wait limits for the netblock.
+The loopback addresses 127.0.0.0/8 and ::1/128 are default at -1.
 .TP
 .B so\-rcvbuf: \fI<number>
 If not 0, then set the SO_RCVBUF socket option to get more buffer
@@ -566,6 +570,9 @@ tls\-system\-cert to load CA certs, otherwise the connections cannot be
 authenticated. This option enables TLS for all of them, but if you do not set
 this you can configure TLS specifically for some forward zones with
 forward\-tls\-upstream.  And also with stub\-tls\-upstream.
+If the tls\-upstream option is enabled, it is for all the forwards and stubs,
+where the forward\-tls\-upstream and stub\-tls\-upstream options are ignored,
+as if they had been set to yes.
 .TP
 .B ssl\-upstream: \fI<yes or no>
 Alternate syntax for \fBtls\-upstream\fR.  If both are present in the config
@@ -713,9 +720,21 @@ and initial ACL (check if the proxy itself is denied/refused by configuration).
 The proxied address (if any) will then be used as the true client address and
 will be used where applicable for logging, ACL, DNSTAP, RPZ and IP ratelimiting.
 PROXYv2 is supported for UDP and TCP/TLS listening interfaces.
-There is no support for PROXYv2 on a DoH or DNSCrypt listening interface.
+There is no support for PROXYv2 on a DoH, DoQ or DNSCrypt listening interface.
 Can list multiple, each on a new statement.
 .TP
+.B quic\-port: \fI<number>
+The port number on which to provide DNS-over-QUIC service, default 853, only
+interfaces configured with that port number as @number get the QUIC service.
+The interface uses QUIC for the UDP traffic on that port number.
+.TP
+.B quic\-size: \fI<size in bytes>
+Maximum number of bytes for all QUIC buffers and data combined. Default is 8
+megabytes. A plain number is in bytes, append 'k', 'm' or 'g' for kilobytes,
+megabytes or gigabytes (1024*1024 bytes in a megabyte). New connections receive
+connection refused when the limit is exceeded. New streams are reset when the
+limit is exceeded.
+.TP
 .B use\-systemd: \fI<yes or no>
 Enable or disable systemd socket activation.
 Default is no.
@@ -887,9 +906,8 @@ outside of the chroot directory.
 Additionally, Unbound may need to access /dev/urandom (for entropy)
 from inside the chroot.
 .IP
-If given a chroot is done to the given directory. By default chroot is
-enabled and the default is "@UNBOUND_CHROOT_DIR@". If you give "" no
-chroot is performed.
+If given a chroot is done to the given directory. The chroot is by default 
+set to "@UNBOUND_CHROOT_DIR@". If you give "" no chroot is performed.
 .TP
 .B username: \fI<name>
 If given, after binding the port the user privileges are dropped. Default is
@@ -936,6 +954,10 @@ Sets logfile lines to use a timestamp in UTC ascii. Default is no, which
 prints the seconds since 1970 in brackets. No effect if using syslog, in
 that case syslog formats the timestamp printed into the log files.
 .TP
+.B log\-time\-iso:\fR <yes or no>
+Log time in ISO8601 format, if \fBlog\-time\-ascii:\fR yes is also set.
+Default is no.
+.TP
 .B log\-queries: \fI<yes or no>
 Prints one line per query to the log, with the log timestamp and IP address,
 name, type and class.  Default is no.  Note that it takes time to print these
@@ -1037,17 +1059,22 @@ closer to that of BIND 9, while setting "\-1 \-1 \-1 \-1 \-1" gives behaviour
 rumoured to be closer to that of BIND 8.
 .TP
 .B harden\-short\-bufsize: \fI<yes or no>
-Very small EDNS buffer sizes from queries are ignored. Default is on, as
+Very small EDNS buffer sizes from queries are ignored. Default is yes, as
 described in the standard.
 .TP
 .B harden\-large\-queries: \fI<yes or no>
-Very large queries are ignored. Default is off, since it is legal protocol
+Very large queries are ignored. Default is no, since it is legal protocol
 wise to send these, and could be necessary for operation if TSIG or EDNS
 payload is very large.
 .TP
 .B harden\-glue: \fI<yes or no>
 Will trust glue only if it is within the servers authority. Default is yes.
 .TP
+.B harden\-unverified\-glue: \fI<yes or no>
+Will trust only in-zone glue. Will try to resolve all out of zone
+(\fI<unverfied>) glue. Will fallback to the original glue if unable to resolve.
+Default is no.
+.TP
 .B harden\-dnssec\-stripped: \fI<yes or no>
 Require DNSSEC data for trust\-anchored zones, if such data is absent,
 the zone becomes bogus. If turned off, and no DNSSEC data is received
@@ -1083,10 +1110,23 @@ to increase the max depth that is checked to.
 .TP
 .B harden\-algo\-downgrade: \fI<yes or no>
 Harden against algorithm downgrade when multiple algorithms are
-advertised in the DS record.  If no, allows the weakest algorithm to
-validate the zone.  Default is no.  Zone signers must produce zones
-that allow this feature to work, but sometimes they do not, and turning
-this option off avoids that validation failure.
+advertised in the DS record.
+This works by first choosing only the strongest DS digest type as per RFC 4509
+(Unbound treats the highest algorithm as the strongest) and then
+expecting signatures from all the advertised signing algorithms from the chosen
+DS(es) to be present.
+If no, allows any one supported algorithm to validate the zone, even if other advertised algorithms are broken.
+Default is no.
+RFC 6840 mandates that zone signers must produce zones signed with all
+advertised algorithms, but sometimes they do not.
+RFC 6840 also clarifies that this requirement is not for validators and
+validators should accept any single valid path.
+It should thus be explicitly noted that this option violates RFC 6840 for
+DNSSEC validation and should only be used to perform a signature
+completeness test to support troubleshooting.
+Using this option may break DNSSEC resolution with non-RFC6840-conforming
+signers and/or in multi-signer configurations that don't send all the
+advertised signatures.
 .TP
 .B harden\-unknown\-additional: \fI<yes or no>
 Harden against unknown records in the authority section and additional
@@ -1107,7 +1147,7 @@ queries.  For domains that do not support 0x20 and also fail with fallback
 because they keep sending different answers, like some load balancers.
 Can be given multiple times, for different domains.
 .TP
-.B caps\-whitelist: \fI<yes or no>
+.B caps\-whitelist: \fI<domain>
 Alternate syntax for \fBcaps\-exempt\fR.
 .TP
 .B qname\-minimisation: \fI<yes or no>
@@ -1171,10 +1211,11 @@ IP6 ::1 and IP4 127.0.0.1/8. If no, then localhost can be used to send
 queries to. Default is yes.
 .TP
 .B prefetch: \fI<yes or no>
-If yes, message cache elements are prefetched before they expire to
-keep the cache up to date.  Default is no.  Turning it on gives about
-10 percent more traffic and load on the machine, but popular items do
-not expire from the cache.
+If yes, cache hits on message cache elements that are on their last 10 percent
+of their TTL value trigger a prefetch to keep the cache up to date.
+Default is no.
+Turning it on gives about 10 percent more traffic and load on the machine, but
+popular items do not expire from the cache.
 .TP
 .B prefetch\-key: \fI<yes or no>
 If yes, fetch the DNSKEYs earlier in the validation process, when a DS
@@ -1194,12 +1235,13 @@ from the query ID, for speed and thread safety).  Default is yes.
 .B minimal-responses: \fI<yes or no>
 If yes, Unbound does not insert authority/additional sections into response
 messages when those sections are not required.  This reduces response
-size significantly, and may avoid TCP fallback for some responses.
-This may cause a slight speedup.  The default is yes, even though the DNS
+size significantly, and may avoid TCP fallback for some responses which may
+cause a slight speedup.  The default is yes, even though the DNS
 protocol RFCs mandate these sections, and the additional content could
-be of use and save roundtrips for clients.  Because they are not used,
-and the saved roundtrips are easier saved with prefetch, whilst this is
-faster.
+save roundtrips for clients that use the additional content.
+However these sections are hardly used by clients.
+Enabling prefetch can benefit clients that need the additional content
+by trying to keep that content fresh in the cache.
 .TP
 .B disable-dnssec-lame-check: \fI<yes or no>
 If true, disables the DNSSEC lameness check in the iterator.  This check
@@ -1222,9 +1264,6 @@ Adding \fIrespip\fR to the front will cause RPZ processing to be done on
 all queries.
 The default is "\fIvalidator iterator\fR".
 .IP
-When the server is built with
-EDNS client subnet support the default is "\fIsubnetcache validator
-iterator\fR".
 Most modules that need to be listed here have to be listed at the beginning
 of the line.  The subnetcachedb module has to be listed just before
 the iterator.
@@ -1364,15 +1403,17 @@ Default is no.
 .TP
 .B serve\-expired: \fI<yes or no>
 If enabled, Unbound attempts to serve old responses from cache with a
-TTL of \fBserve\-expired\-reply\-ttl\fR in the response without waiting for the
-actual resolution to finish.  The actual resolution answer ends up in the cache
-later on.  Default is "no".
+TTL of \fBserve\-expired\-reply\-ttl\fR in the response.
+By default the expired answer will be used after a resolution attempt errored
+out or is taking more than serve\-expired\-client\-timeout to resolve.
+Default is "no".
 .TP
 .B serve\-expired\-ttl: \fI<seconds>
-Limit serving of expired responses to configured seconds after expiration. 0
-disables the limit.  This option only applies when \fBserve\-expired\fR is
-enabled.  A suggested value per RFC 8767 is between
-86400 (1 day) and 259200 (3 days).  The default is 0.
+Limit serving of expired responses to configured seconds after expiration.
+0 disables the limit.
+This option only applies when \fBserve\-expired\fR is enabled.
+A suggested value per RFC 8767 is between 86400 (1 day) and 259200 (3 days).
+The default is 86400.
 .TP
 .B serve\-expired\-ttl\-reset: \fI<yes or no>
 Set the TTL of expired records to the \fBserve\-expired\-ttl\fR value after a
@@ -1386,12 +1427,14 @@ TTL value to use when replying with expired data.  If
 use 30 as the value (RFC 8767).  The default is 30.
 .TP
 .B serve\-expired\-client\-timeout: \fI<msec>
-Time in milliseconds before replying to the client with expired data.  This
-essentially enables the serve-stale behavior as specified in
+Time in milliseconds before replying to the client with expired data.
+This essentially enables the serve-stale behavior as specified in
 RFC 8767 that first tries to resolve before immediately
-responding with expired data.  A recommended value per
-RFC 8767 is 1800.  Setting this to 0 will disable this
-behavior.  Default is 0.
+responding with expired data.
+Setting this to 0 will disable this behavior and instead serve the expired
+record immediately from the cache before attempting to refresh it via
+resolution.
+Default is 1800.
 .TP
 .B serve\-original\-ttl: \fI<yes or no>
 If enabled, Unbound will always return the original TTL as received from
@@ -1596,6 +1639,7 @@ given zone.  Use \fInodefault\fR if you use exactly that zone, if you want to
 use a subzone, use \fItransparent\fR.
 .P
 The default zones are localhost, reverse 127.0.0.1 and ::1, the home.arpa,
+the resolver.arpa, the service.arpa,
 the onion, test, invalid and the AS112 zones. The AS112 zones are reverse
 DNS zones for private use and reserved IP addresses for which the servers
 on the internet cannot provide correct answers. They are configured by
@@ -1651,6 +1695,24 @@ local\-data: "home.arpa. 10800 IN
    SOA localhost. nobody.invalid. 1 3600 1200 604800 10800"
 .fi
 .TP 10
+\h'5'\fIresolver.arpa (RFC 9462)\fR
+Default content:
+.nf
+local\-zone: "resolver.arpa." static
+local\-data: "resolver.arpa. 10800 IN NS localhost."
+local\-data: "resolver.arpa. 10800 IN
+    SOA localhost. nobody.invalid. 1 3600 1200 604800 10800"
+.fi
+.TP 10
+\h'5'\fIservice.arpa (draft-ietf-dnssd-srp-25)\fR
+Default content:
+.nf
+local\-zone: "service.arpa." static
+local\-data: "service.arpa. 10800 IN NS localhost."
+local\-data: "service.arpa. 10800 IN
+    SOA localhost. nobody.invalid. 1 3600 1200 604800 10800"
+.fi
+.TP 10
 \h'5'\fIonion (RFC 7686)\fR
 Default content:
 .nf
@@ -1957,6 +2019,23 @@ Changing this value needs caution as it can allow long CNAME chains to be
 accepted, where Unbound needs to verify (resolve) each link individually.
 Default is 11.
 .TP 5
+.B iter\-scrub\-ns: \fI<number>
+Limit on the number of NS records allowed in an rrset of type NS, from the
+iterator scrubber. This protects the internals of the resolver from overly
+large NS sets. Default is 20.
+.TP 5
+.B iter\-scrub\-cname: \fI<number>
+Limit on the number of CNAME, DNAME records in an answer, from the iterator
+scrubber. This protects the internals of the resolver from overly long
+indirection chains. Clips off the remainder of the reply packet at that point.
+Default is 11.
+.TP 5
+.B max\-global\-quota: \fI<number>
+Limit on the number of upstream queries sent out for an incoming query and
+its subqueries from recursion. It is not reset during the resolution. When
+it is exceeded the query is failed and the lookup process stops.
+Default is 200.
+.TP 5
 .B fast\-server\-permil: \fI<number>
 Specify how many times out of 1000 to pick from the set of fastest servers.
 0 turns the feature off.  A value of 900 would pick from the fastest
@@ -1983,6 +2062,20 @@ Useful to explicitly set for servers in an anycast deployment that need to
 share the secret in order to verify each other's Server Cookies.
 An example hex string would be "000102030405060708090a0b0c0d0e0f".
 Default is a 128 bits random secret generated at startup time.
+This option is ignored if a \fBcookie\-secret\-file\fR is
+present.  In that case the secrets from that file are used in DNS Cookie
+calculations.
+.TP 5
+.B cookie\-secret\-file: \fI<filename>
+File from which the secrets are read used in DNS Cookie calculations. When this
+file exists, the secrets in this file are used and the secret specified by the
+\fBcookie-secret\fR option is ignored.
+Enable it by setting a filename, like "/usr/local/etc/unbound_cookiesecrets.txt".
+The content of this file must be manipulated with the \fBadd_cookie_secret\fR,
+\fBdrop_cookie_secret\fR and \fBactivate_cookie_secret\fR commands to the
+\fIunbound\-control\fR(8) tool. Please see that manpage on how to perform a
+safe cookie secret rollover.
+Default is "" (disabled).
 .TP 5
 .B edns\-client\-string: \fI<IP netblock> <string>
 Include an EDNS0 option containing configured ascii string in queries with
@@ -1996,17 +2089,30 @@ be used.  Default is 65001.
 .TP 5
 .B ede: \fI<yes or no>
 If enabled, Unbound will respond with Extended DNS Error codes (RFC8914).
-These EDEs attach informative error messages to a response for various
-errors. Default is "no".
+These EDEs provide additional information with a response mainly for, but not
+limited to, DNS and DNSSEC errors.

 When the \fBval-log-level\fR option is also set to \fB2\fR, responses with
-Extended DNS Errors concerning DNSSEC failures that are not served from cache,
-will also contain a descriptive text message about the reason for the failure.
+Extended DNS Errors concerning DNSSEC failures will also contain a descriptive
+text message about the reason for the failure.
+Default is "no".
 .TP 5
 .B ede\-serve\-expired: \fI<yes or no>
 If enabled, Unbound will attach an Extended DNS Error (RFC8914) Code 3 - Stale
-Answer as EDNS0 option to the expired response. Note that this will not attach
-the EDE code without setting the global \fBede\fR option to "yes" as well.
+Answer as EDNS0 option to the expired response.
+The \fBede\fR option needs to be enabled as well for this to work.
+Default is "no".
+.TP 5
+.B dns\-error\-reporting: \fI<yes or no>
+If enabled, Unbound will send DNS Error Reports (RFC9567).
+The name servers need to express support by attaching the Report-Channel EDNS0
+option on their replies specifying the reporting agent for the zone.
+Any errors encountered during resolution that would result in Unbound
+generating an Extended DNS Error (RFC8914) will be reported to the zone's
+reporting agent.
+The \fBede\fR option does not need to be enabled for this to work.
+It is advised that the \fBqname\-minimisation\fR option is also enabled to
+increase privacy on the outgoing reports.
 Default is "no".
 .SS "Remote Control Options"
 In the
@@ -2419,8 +2525,8 @@ The dynamic library file to load. Repeat this option for every dynlib module
 instance added to the \fBmodule\-config:\fR option.
 .SS "DNS64 Module Options"
 .LP
-The dns64 module must be configured in the \fBmodule\-config:\fR "dns64
-validator iterator" directive and be compiled into the daemon to be
+The dns64 module must be configured in the \fBmodule\-config:\fR directive
+e.g., "dns64 validator iterator" and be compiled into the daemon to be
 enabled.  These settings go in the \fBserver:\fR section.
 .TP
 .B dns64\-prefix: \fI<IPv6 prefix>\fR
@@ -2520,8 +2626,8 @@ in the dnscrypt nonce cache.  Close to the number of cpus is
 a fairly good setting.
 .SS "EDNS Client Subnet Module Options"
 .LP
-The ECS module must be configured in the \fBmodule\-config:\fR "subnetcache
-validator iterator" directive and be compiled into the daemon to be
+The ECS module must be configured in the \fBmodule\-config:\fR directive e.g.,
+"subnetcache validator iterator" and be compiled into the daemon to be
 enabled.  These settings go in the \fBserver:\fR section.
 .LP
 If the destination address is allowed in the configuration Unbound will add the
@@ -2542,6 +2648,15 @@ configuration file. On top of that, for each query only 100 different subnets
 are allowed to be stored for each address family. Exceeding that number, older
 entries will be purged from cache.
 .LP
+Note that due to the nature of how EDNS Client Subnet works, by segregating the
+client IP space in order to try and have tailored responses for prefixes of
+unknown sizes, resolution and cache response performance are impacted as a
+result.
+Usage of the subnetcache module should only be enabled in installations that
+require such functionality where the resolver and the clients belong to
+different networks.
+An example of that is an open resolver installation.
+.LP
 This module does not interact with the \fBserve\-expired*\fR and
 \fBprefetch:\fR options.
 .TP
@@ -2592,8 +2707,8 @@ Specifies the maximum number of subnets ECS answers kept in the ECS radix tree.
 This number applies for each qname/qclass/qtype tuple. Defaults to 100.
 .SS "Opportunistic IPsec Support Module Options"
 .LP
-The IPsec module must be configured in the \fBmodule\-config:\fR "ipsecmod
-validator iterator" directive and be compiled into Unbound by using
+The IPsec module must be configured in the \fBmodule\-config:\fR directive
+e.g., "ipsecmod validator iterator" and be compiled into Unbound by using
 \fB\-\-enable\-ipsecmod\fR to be enabled.
 These settings go in the \fBserver:\fR section.
 .LP
@@ -2658,12 +2773,12 @@ Allow the ipsecmod functionality for the domain so that the module logic will be
 executed.  Can be given multiple times, for different domains.  If the option is
 not specified, all domains are treated as being allowed (default).
 .TP
-.B ipsecmod\-whitelist: \fI<yes or no>
+.B ipsecmod\-whitelist: \fI<domain>
 Alternate syntax for \fBipsecmod\-allow\fR.
 .SS "Cache DB Module Options"
 .LP
-The Cache DB module must be configured in the \fBmodule\-config:\fR
-"validator cachedb iterator" directive and be compiled into the daemon
+The Cache DB module must be configured in the \fBmodule\-config:\fR directive
+e.g., "validator cachedb iterator" and be compiled into the daemon
 with \fB\-\-enable\-cachedb\fR.
 If this module is enabled and configured, the specified backend database
 works as a second level cache:
@@ -2758,12 +2873,12 @@ The TCP port number of the Redis server.
 This option defaults to 6379.
 .TP
 .B redis-server-path: \fI<unix socket path>\fR
-The unix socket path to connect to the redis server. Off by default, and it
+The unix socket path to connect to the Redis server. Off by default, and it
 can be set to "" to turn this off. Unix sockets may have better throughput
 than the IP address option.
 .TP
 .B redis-server-password: \fI"<password>"\fR
-The Redis AUTH password to use for the redis server.
+The Redis AUTH password to use for the Redis server.
 Only relevant if Redis is configured for client password authorisation.
 Off by default, and it can be set to "" to turn this off.
 .TP
@@ -2774,6 +2889,16 @@ if the Redis server does not have the requested data, and will try to
 re-establish a new connection later.
 This option defaults to 100 milliseconds.
 .TP
+.B redis-command-timeout: \fI<msec>\fR
+The timeout to use for Redis commands, in milliseconds.
+If 0, it uses the \fBredis\-timeout\fR value.
+The default is 0.
+.TP
+.B redis-connect-timeout: \fI<msec>\fR
+The timeout to use for Redis connection set up, in milliseconds.
+If 0, it uses the \fBredis\-timeout\fR value.
+The default is 0.
+.TP
 .B redis-expire-records: \fI<yes or no>
 If Redis record expiration is enabled.  If yes, Unbound sets timeout for Redis
 records so that Redis can evict keys that have expired automatically.  If
@@ -2792,6 +2917,52 @@ for multiple unrelated applications.
 The default database in Redis is 0 while other logical databases need to be
 explicitly SELECT'ed upon connecting.
 This option defaults to 0.
+.TP
+.B redis-replica-server-host: \fI<server address or name>\fR
+The IP (either v6 or v4) address or domain name of the Redis replica server.
+In general an IP address should be specified as otherwise Unbound will have to
+resolve the name of the server every time it establishes a connection
+to the server.
+This server is treated as a read-only replica server
+(https://redis.io/docs/management/replication/#read-only-replica).
+If specified, all Redis read commands will go to this replica server, while
+the write commands will go to the \fBredis-server-host\fR.
+This option defaults to "" (disabled).
+.TP
+.B redis-replica-server-port: \fI<port number>\fR
+The TCP port number of the Redis replica server.
+This option defaults to 6379.
+.TP
+.B redis-replica-server-path: \fI<unix socket path>\fR
+The unix socket path to connect to the Redis server. Off by default, and it
+can be set to "" to turn this off. Unix sockets may have better throughput
+than the IP address option.
+.TP
+.B redis-replica-server-password: \fI"<password>"\fR
+The Redis AUTH password to use for the Redis replica server.
+Only relevant if Redis is configured for client password authorisation.
+Off by default, and it can be set to "" to turn this off.
+.TP
+.B redis-replica-timeout: \fI<msec>\fR
+The period until when Unbound waits for a response from the Redis replica sever.
+If this timeout expires Unbound closes the connection, treats it as
+if the Redis replica server does not have the requested data, and will try to
+re-establish a new connection later.
+This option defaults to 100 milliseconds.
+.TP
+.B redis-replica-command-timeout: \fI<msec>\fR
+The timeout to use for Redis replica commands, in milliseconds.
+If 0, it uses the \fBredis\-replica\-timeout\fR value.
+The default is 0.
+.TP
+.B redis-replica-connect-timeout: \fI<msec>\fR
+The timeout to use for Redis replica connection set up, in milliseconds.
+If 0, it uses the \fBredis\-replica\-timeout\fR value.
+The default is 0.
+.TP
+.B redis-replica-logical-db: \fI<logical database index>
+Same as \fBredis-logical-db\fR but for the Redis replica server.
+This option defaults to 0.
 .SS DNSTAP Logging Options
 DNSTAP support, when compiled in by using \fB\-\-enable\-dnstap\fR, is enabled
 in the \fBdnstap:\fR section.
@@ -2883,9 +3054,11 @@ Enable to log forwarder response messages.  Default is no.
 .SS Response Policy Zone Options
 .LP
 Response Policy Zones are configured with \fBrpz:\fR, and each one must have a
-\fBname:\fR. There can be multiple ones, by listing multiple rpz clauses, each
-with a different name. RPZ clauses are applied in order of configuration. The
-\fBrespip\fR module needs to be added to the \fBmodule-config\fR, e.g.:
+\fBname:\fR. There can be multiple ones, by listing multiple RPZ clauses, each
+with a different name. RPZ clauses are applied in order of configuration and
+any match from an earlier RPZ zone will terminate the RPZ lookup. Note that a
+PASSTHRU action is still considered a match.
+The \fBrespip\fR module needs to be added to the \fBmodule-config\fR, e.g.:
 \fBmodule-config: "respip validator iterator"\fR.
 .P
 QNAME, Response IP Address, nsdname, nsip and clientip triggers are supported.
@@ -2893,12 +3066,13 @@ Supported actions are: NXDOMAIN, NODATA, PASSTHRU, DROP, Local Data, tcp\-only
 and drop.  RPZ QNAME triggers are applied after \fBlocal\-zones\fR and
 before \fBauth\-zones\fR.
 .P
-The rpz zone is formatted with a SOA start record as usual.  The items in
-the zone are entries, that specify what to act on (the trigger) and what to
-do (the action).  The trigger to act on is recorded in the name, the action
-to do is recorded as the resource record.  The names all end in the zone
-name, so you could type the trigger names without a trailing dot in the
-zonefile.
+The RPZ zone is a regular DNS zone formatted with a SOA start record as usual.
+The items in the zone are entries, that specify what to act on (the trigger)
+and what to do (the action).
+The trigger to act on is recorded in the name, the action to do is recorded as
+the resource record.
+The names all end in the zone name, so you could type the trigger names without
+a trailing dot in the zonefile.
 .P
 An example RPZ record, that answers example.com with NXDOMAIN
 .nf
@@ -2998,7 +3172,7 @@ externally blocked. Default is no.
 If enabled the zone is authoritatively answered for and queries for the RPZ
 zone information are answered to downstream clients. This is useful for
 monitoring scripts, that can then access the SOA information to check if
-the rpz information is up to date. Default is no.
+the RPZ information is up to date. Default is no.
 .TP
 .B tags: \fI<list of tags>
 Limit the policies from this RPZ clause to clients with a matching tag. Tags
@@ -1226,7 +1226,7 @@ VERBATIM_HEADERS       = NO
 # generated with the -Duse_libclang=ON option for CMake.
 # The default value is: NO.

-CLANG_ASSISTED_PARSING = NO
+#CLANG_ASSISTED_PARSING = NO

 # If the CLANG_ASSISTED_PARSING tag is set to YES and the CLANG_ADD_INC_PATHS
 # tag is set to YES then doxygen will add the directory of each input to the
@@ -1234,7 +1234,7 @@ CLANG_ASSISTED_PARSING = NO
 # The default value is: YES.
 # This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.

-CLANG_ADD_INC_PATHS    = YES
+#CLANG_ADD_INC_PATHS    = YES

 # If clang assisted parsing is enabled you can provide the compiler with command
 # line options that you would normally use when invoking the compiler. Note that
@@ -1242,7 +1242,7 @@ CLANG_ADD_INC_PATHS    = YES
 # specified with INPUT and INCLUDE_PATH.
 # This tag requires that the tag CLANG_ASSISTED_PARSING is set to YES.

-CLANG_OPTIONS          =
+#CLANG_OPTIONS          =

 # If clang assisted parsing is enabled you can provide the clang parser with the
 # path to the directory containing a file called compile_commands.json. This
@@ -1255,7 +1255,7 @@ CLANG_OPTIONS          =
 # Note: The availability of this option depends on whether or not doxygen was
 # generated with the -Duse_libclang=ON option for CMake.

-CLANG_DATABASE_PATH    =
+#CLANG_DATABASE_PATH    =

 #---------------------------------------------------------------------------
 # Configuration options related to the alphabetical class index
@@ -456,7 +456,8 @@ ipsecmod_handle_query(struct module_qstate* qstate,
 	/* Store A/AAAA in cache. */
 	if(!dns_cache_store(qstate->env, &qstate->qinfo,
 		qstate->return_msg->rep, 0, qstate->prefetch_leeway,
-		0, qstate->region, qstate->query_flags, qstate->qstarttime)) {
+		0, qstate->region, qstate->query_flags, qstate->qstarttime,
+		qstate->is_valrec)) {
 		log_err("ipsecmod: out of memory caching record");
 	}
 	qstate->ext_state[id] = module_finished;
@@ -278,7 +278,7 @@ delegpt_count_addr(struct delegpt* dp, size_t* numaddr, size_t* numres,

 void delegpt_log(enum verbosity_value v, struct delegpt* dp)
 {
-	char buf[LDNS_MAX_DOMAINLEN+1];
+	char buf[LDNS_MAX_DOMAINLEN];
 	struct delegpt_ns* ns;
 	struct delegpt_addr* a;
 	size_t missing=0, numns=0, numaddr=0, numres=0, numavail=0;
@@ -129,7 +129,7 @@ forwards_insert_data(struct iter_forwards* fwd, uint16_t c, uint8_t* nm,
 	node->namelabs = nmlabs;
 	node->dp = dp;
 	if(!rbtree_insert(fwd->tree, &node->node)) {
-		char buf[257];
+		char buf[LDNS_MAX_DOMAINLEN];
 		dname_str(nm, buf);
 		log_err("duplicate forward zone %s ignored.", buf);
 		delegpt_free_mlc(dp);
@@ -331,6 +331,30 @@ make_stub_holes(struct iter_forwards* fwd, struct config_file* cfg)
 	return 1;
 }

+/** make NULL entries for auths */
+static int
+make_auth_holes(struct iter_forwards* fwd, struct config_file* cfg)
+{
+	struct config_auth* a;
+	uint8_t* dname;
+	size_t dname_len;
+	for(a = cfg->auths; a; a = a->next) {
+		if(!a->name) continue;
+		dname = sldns_str2wire_dname(a->name, &dname_len);
+		if(!dname) {
+			log_err("cannot parse auth name '%s'", a->name);
+			return 0;
+		}
+		if(!fwd_add_stub_hole(fwd, LDNS_RR_CLASS_IN, dname)) {
+			free(dname);
+			log_err("out of memory");
+			return 0;
+		}
+		free(dname);
+	}
+	return 1;
+}
+
 int 
 forwards_apply_cfg(struct iter_forwards* fwd, struct config_file* cfg)
 {
@@ -353,6 +377,16 @@ forwards_apply_cfg(struct iter_forwards* fwd, struct config_file* cfg)
 		lock_rw_unlock(&fwd->lock);
 		return 0;
 	}
+	/* TODO: Now we punch holes for auth zones as well so that in
+	 *       iterator:forward_request() we see the configured
+	 *       delegation point, but code flow/naming is hard to follow.
+	 *       Consider having a single tree with configured
+	 *       delegation points for all categories
+	 *       (stubs, forwards, auths). */
+	if(!make_auth_holes(fwd, cfg)) {
+		lock_rw_unlock(&fwd->lock);
+		return 0;
+	}
 	fwd_init_parents(fwd);
 	lock_rw_unlock(&fwd->lock);
 	return 1;
@@ -590,3 +624,19 @@ forwards_delete_stub_hole(struct iter_forwards* fwd, uint16_t c,
 	fwd_init_parents(fwd);
 	if(!nolock) { lock_rw_unlock(&fwd->lock); }
 }
+
+void
+forwards_swap_tree(struct iter_forwards* fwd, struct iter_forwards* data)
+{
+	rbtree_type* oldtree = fwd->tree;
+	if(oldtree) {
+		lock_unprotect(&fwd->lock, oldtree);
+	}
+	if(data->tree) {
+		lock_unprotect(&data->lock, data->tree);
+	}
+	fwd->tree = data->tree;
+	data->tree = oldtree;
+	lock_protect(&fwd->lock, fwd->tree, sizeof(*fwd->tree));
+	lock_protect(&data->lock, data->tree, sizeof(*data->tree));
+}
@@ -234,4 +234,13 @@ int forwards_add_stub_hole(struct iter_forwards* fwd, uint16_t c,
 void forwards_delete_stub_hole(struct iter_forwards* fwd, uint16_t c,
 	uint8_t* nm, int nolock);

+/**
+ * Swap internal tree with preallocated entries. Caller should manage
+ * the locks.
+ * @param fwd: the forward data structure.
+ * @param data: the data structure used to take elements from. This contains
+ * 	the old elements on return.
+ */
+void forwards_swap_tree(struct iter_forwards* fwd, struct iter_forwards* data);
+
 #endif /* ITERATOR_ITER_FWD_H */
@@ -181,7 +181,7 @@ hints_insert(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
 	node->noprime = (uint8_t)noprime;
 	if(!name_tree_insert(&hints->tree, &node->node, dp->name, dp->namelen,
 		dp->namelabs, c)) {
-		char buf[257];
+		char buf[LDNS_MAX_DOMAINLEN];
 		dname_str(dp->name, buf);
 		log_err("second hints for zone %s ignored.", buf);
 		delegpt_free_mlc(dp);
@@ -611,3 +611,14 @@ hints_delete_stub(struct iter_hints* hints, uint16_t c, uint8_t* nm,
 	name_tree_init_parents(&hints->tree);
 	if(!nolock) { lock_rw_unlock(&hints->lock); }
 }
+
+void
+hints_swap_tree(struct iter_hints* hints, struct iter_hints* data)
+{
+	rbnode_type* oldroot = hints->tree.root;
+	size_t oldcount = hints->tree.count;
+	hints->tree.root = data->tree.root;
+	hints->tree.count = data->tree.count;
+	data->tree.root = oldroot;
+	data->tree.count = oldcount;
+}
@@ -198,4 +198,13 @@ int hints_add_stub(struct iter_hints* hints, uint16_t c, struct delegpt* dp,
 void hints_delete_stub(struct iter_hints* hints, uint16_t c,
 	uint8_t* nm, int nolock);

+/**
+ * Swap internal tree with preallocated entries. Caller should manage
+ * the locks.
+ * @param hints: the hints data structure.
+ * @param data: the data structure used to take elements from. This contains
+ * 	the old elements on return.
+ */
+void hints_swap_tree(struct iter_hints* hints, struct iter_hints* data);
+
 #endif /* ITERATOR_ITER_HINTS_H */
@@ -367,6 +367,47 @@ type_allowed_in_additional_section(uint16_t tp)
 	return 0;
 }

+/** Shorten RRset */
+static void
+shorten_rrset(sldns_buffer* pkt, struct rrset_parse* rrset, int count)
+{
+	/* The too large NS RRset is shortened. This is so that too large
+	 * content does not overwhelm the cache. It may make the rrset
+	 * bogus if it was signed, and then the domain is not resolved any
+	 * more, that is okay, the NS RRset was too large. During a referral
+	 * it can be shortened and then the first part of the list could
+	 * be used to resolve. The scrub continues to disallow glue for the
+	 * removed nameserver RRs and removes that too. Because the glue
+	 * is not marked as okay, since the RRs have been removed here. */
+	int i;
+	struct rr_parse* rr = rrset->rr_first, *prev = NULL;
+	if(!rr)
+		return;
+	for(i=0; i<count; i++) {
+		prev = rr;
+		rr = rr->next;
+		if(!rr)
+			return; /* The RRset is already short. */
+	}
+	if(verbosity >= VERB_QUERY
+		&& rrset->dname_len <= LDNS_MAX_DOMAINLEN) {
+		uint8_t buf[LDNS_MAX_DOMAINLEN+1];
+		dname_pkt_copy(pkt, buf, rrset->dname);
+		log_nametypeclass(VERB_QUERY, "normalize: shorten RRset:", buf,
+			rrset->type, ntohs(rrset->rrset_class));
+	}
+	/* remove further rrs */
+	rrset->rr_last = prev;
+	rrset->rr_count = count;
+	while(rr) {
+		rrset->size -= rr->size;
+		rr = rr->next;
+	}
+	if(rrset->rr_last)
+		rrset->rr_last->next = NULL;
+	else	rrset->rr_first = NULL;
+}
+
 /**
 * This routine normalizes a response. This includes removing "irrelevant"
 * records from the answer and additional sections and (re)synthesizing
@@ -387,6 +428,7 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 	uint8_t* sname = qinfo->qname;
 	size_t snamelen = qinfo->qname_len;
 	struct rrset_parse* rrset, *prev, *nsset=NULL;
+	int cname_length = 0; /* number of CNAMEs, or DNAMEs */

 	if(FLAGS_GET_RCODE(msg->flags) != LDNS_RCODE_NOERROR &&
 		FLAGS_GET_RCODE(msg->flags) != LDNS_RCODE_NXDOMAIN)
@@ -401,6 +443,16 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 	prev = NULL;
 	rrset = msg->rrset_first;
 	while(rrset && rrset->section == LDNS_SECTION_ANSWER) {
+		if(cname_length > env->cfg->iter_scrub_cname) {
+			/* Too many CNAMEs, or DNAMEs, from the authority
+			 * server, scrub down the length to something
+			 * shorter. This deletes everything after the limit
+			 * is reached. The iterator is going to look up
+			 * the content one by one anyway. */
+			remove_rrset("normalize: removing because too many cnames:",
+				pkt, msg, prev, &rrset);
+			continue;
+		}
 		if(rrset->type == LDNS_RR_TYPE_DNAME && 
 			pkt_strict_sub(pkt, sname, rrset->dname)) {
 			/* check if next rrset is correct CNAME. else,
@@ -420,6 +472,7 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 					"too long");
 				return 0;
 			}
+			cname_length++;
 			if(nx && nx->type == LDNS_RR_TYPE_CNAME && 
 			   dname_pkt_compare(pkt, sname, nx->dname) == 0) {
 				/* check next cname */
@@ -460,6 +513,7 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 		if(rrset->type == LDNS_RR_TYPE_CNAME) {
 			struct rrset_parse* nx = rrset->rrset_all_next;
 			uint8_t* oldsname = sname;
+			cname_length++;
 			/* see if the next one is a DNAME, if so, swap them */
 			if(nx && nx->section == LDNS_SECTION_ANSWER &&
 				nx->type == LDNS_RR_TYPE_DNAME &&
@@ -507,6 +561,10 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 					LDNS_SECTION_ANSWER &&
 					dname_pkt_compare(pkt, oldsname,
 					rrset->dname) == 0) {
+					if(rrset->type == LDNS_RR_TYPE_NS &&
+						rrset->rr_count > env->cfg->iter_scrub_ns) {
+						shorten_rrset(pkt, rrset, env->cfg->iter_scrub_ns);
+					}
 					prev = rrset;
 					rrset = rrset->rrset_all_next;
 				}
@@ -522,6 +580,11 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 			continue;
 		}

+		if(rrset->type == LDNS_RR_TYPE_NS &&
+			rrset->rr_count > env->cfg->iter_scrub_ns) {
+			shorten_rrset(pkt, rrset, env->cfg->iter_scrub_ns);
+		}
+
 		/* Mark the additional names from relevant rrset as OK. */
 		/* only for RRsets that match the query name, other ones
 		 * will be removed by sanitize, so no additional for them */
@@ -578,6 +641,25 @@ scrub_normalize(sldns_buffer* pkt, struct msg_parse* msg,
 					"RRset:", pkt, msg, prev, &rrset);
 				continue;
 			}
+			if(rrset->rr_count > env->cfg->iter_scrub_ns) {
+				/* If this is not a referral, and the NS RRset
+				 * is signed, then remove it entirely, so
+				 * that when it becomes bogus it does not
+				 * make the message that is otherwise fine
+				 * into a bogus message. */
+				if(!(msg->an_rrsets == 0 &&
+					FLAGS_GET_RCODE(msg->flags) ==
+					LDNS_RCODE_NOERROR &&
+					!soa_in_auth(msg) &&
+					!(msg->flags & BIT_AA)) &&
+					rrset->rrsig_count != 0) {
+					remove_rrset("normalize: removing too large NS "
+						"RRset:", pkt, msg, prev, &rrset);
+					continue;
+				} else {
+					shorten_rrset(pkt, rrset, env->cfg->iter_scrub_ns);
+				}
+			}
 		}
 		/* if this is type DS and we query for type DS we just got
 		 * a referral answer for our type DS query, fix packet */
@@ -789,6 +871,7 @@ scrub_sanitize(sldns_buffer* pkt, struct msg_parse* msg,
 {
 	int del_addi = 0; /* if additional-holding rrsets are deleted, we
 		do not trust the normalized additional-A-AAAA any more */
+	uint8_t* ns_rrset_dname = NULL;
 	int added_rrlen_ede = 0;
 	struct rrset_parse* rrset, *prev;
 	prev = NULL;
@@ -894,6 +977,16 @@ scrub_sanitize(sldns_buffer* pkt, struct msg_parse* msg,
 				continue;
 			}
 		}
+		if(rrset->type == LDNS_RR_TYPE_NS &&
+			(rrset->section == LDNS_SECTION_AUTHORITY ||
+			rrset->section == LDNS_SECTION_ANSWER)) {
+			/* If the type is NS, and we're in the
+			 * answer or authority section, then
+			 * store the dname so we can check
+			 * against the glue records
+			 * further down	*/
+			ns_rrset_dname = rrset->dname;
+		}
 		if(del_addi && rrset->section == LDNS_SECTION_ADDITIONAL) {
 			remove_rrset("sanitize: removing potential "
 			"poison reference RRset:", pkt, msg, prev, &rrset);
@@ -906,6 +999,26 @@ scrub_sanitize(sldns_buffer* pkt, struct msg_parse* msg,
 				"RRset:", pkt, msg, prev, &rrset);
 			continue;
 		}
+		if(env->cfg->harden_unverified_glue && ns_rrset_dname &&
+			rrset->section == LDNS_SECTION_ADDITIONAL &&
+			(rrset->type == LDNS_RR_TYPE_A || rrset->type == LDNS_RR_TYPE_AAAA) &&
+			!pkt_strict_sub(pkt, rrset->dname, ns_rrset_dname)) {
+			/* We're in the additional section, looking
+			 * at an A/AAAA rrset, have a previous
+			 * delegation point and we notice that
+			 * the glue records are NOT for strict
+			 * subdomains of the delegation. So set a
+			 * flag, recompute the hash for the rrset
+			 * and write the A/AAAA record to cache.
+			 * It'll be retrieved if we can't separately
+			 * resolve the glue	*/
+			rrset->flags = PACKED_RRSET_UNVERIFIED_GLUE;
+			rrset->hash = pkt_hash_rrset(pkt, rrset->dname, rrset->type, rrset->rrset_class, rrset->flags);
+			store_rrset(pkt, msg, env, rrset);
+			remove_rrset("sanitize: storing potential "
+			"unverified glue reference RRset:", pkt, msg, prev, &rrset);
+			continue;
+		}
 		prev = rrset;
 		rrset = rrset->rrset_all_next;
 	}
@@ -77,41 +77,73 @@
 static const char DEFAULT_NAT64_PREFIX[] = "64:ff9b::/96";

 /** fillup fetch policy array */
-static void
-fetch_fill(struct iter_env* ie, const char* str)
+static int
+fetch_fill(int* target_fetch_policy, int max_dependency_depth, const char* str)
 {
 	char* s = (char*)str, *e;
 	int i;
-	for(i=0; i<ie->max_dependency_depth+1; i++) {
-		ie->target_fetch_policy[i] = strtol(s, &e, 10);
-		if(s == e)
-			fatal_exit("cannot parse fetch policy number %s", s);
+	for(i=0; i<max_dependency_depth+1; i++) {
+		target_fetch_policy[i] = strtol(s, &e, 10);
+		if(s == e) {
+			log_err("cannot parse fetch policy number %s", s);
+			return 0;
+		}
 		s = e;
 	}
+	return 1;
 }

 /** Read config string that represents the target fetch policy */
-static int
-read_fetch_policy(struct iter_env* ie, const char* str)
+int
+read_fetch_policy(int** target_fetch_policy, int* max_dependency_depth,
+	const char* str)
 {
 	int count = cfg_count_numbers(str);
 	if(count < 1) {
 		log_err("Cannot parse target fetch policy: \"%s\"", str);
 		return 0;
 	}
-	ie->max_dependency_depth = count - 1;
-	ie->target_fetch_policy = (int*)calloc(
-		(size_t)ie->max_dependency_depth+1, sizeof(int));
-	if(!ie->target_fetch_policy) {
+	*max_dependency_depth = count - 1;
+	*target_fetch_policy = (int*)calloc(
+		(size_t)(*max_dependency_depth)+1, sizeof(int));
+	if(!*target_fetch_policy) {
 		log_err("alloc fetch policy: out of memory");
 		return 0;
 	}
-	fetch_fill(ie, str);
+	if(!fetch_fill(*target_fetch_policy, *max_dependency_depth, str))
+		return 0;
 	return 1;
 }

-/** apply config caps whitelist items to name tree */
-static int
+struct rbtree_type*
+caps_white_create(void)
+{
+	struct rbtree_type* caps_white = rbtree_create(name_tree_compare);
+	if(!caps_white)
+		log_err("out of memory");
+	return caps_white;
+}
+
+/** delete caps_whitelist element */
+static void
+caps_free(struct rbnode_type* n, void* ATTR_UNUSED(d))
+{
+	if(n) {
+		free(((struct name_tree_node*)n)->name);
+		free(n);
+	}
+}
+
+void
+caps_white_delete(struct rbtree_type* caps_white)
+{
+	if(!caps_white)
+		return;
+	traverse_postorder(caps_white, caps_free, NULL);
+	free(caps_white);
+}
+
+int
 caps_white_apply_cfg(rbtree_type* ntree, struct config_file* cfg)
 {
 	struct config_strlist* p;
@@ -145,12 +177,41 @@ caps_white_apply_cfg(rbtree_type* ntree, struct config_file* cfg)
 }

 int
-iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
+nat64_apply_cfg(struct iter_nat64* nat64, struct config_file* cfg)
 {
 	const char *nat64_prefix;
+
+	nat64_prefix = cfg->nat64_prefix;
+	if(!nat64_prefix)
+		nat64_prefix = cfg->dns64_prefix;
+	if(!nat64_prefix)
+		nat64_prefix = DEFAULT_NAT64_PREFIX;
+	if(!netblockstrtoaddr(nat64_prefix, 0, &nat64->nat64_prefix_addr,
+		&nat64->nat64_prefix_addrlen, &nat64->nat64_prefix_net)) {
+		log_err("cannot parse nat64-prefix netblock: %s", nat64_prefix);
+		return 0;
+	}
+	if(!addr_is_ip6(&nat64->nat64_prefix_addr,
+		nat64->nat64_prefix_addrlen)) {
+		log_err("nat64-prefix is not IPv6: %s", cfg->nat64_prefix);
+		return 0;
+	}
+	if(!prefixnet_is_nat64(nat64->nat64_prefix_net)) {
+		log_err("nat64-prefix length it not 32, 40, 48, 56, 64 or 96: %s",
+			nat64_prefix);
+		return 0;
+	}
+	nat64->use_nat64 = cfg->do_nat64;
+	return 1;
+}
+
+int
+iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
+{
 	int i;
 	/* target fetch policy */
-	if(!read_fetch_policy(iter_env, cfg->target_fetch_policy))
+	if(!read_fetch_policy(&iter_env->target_fetch_policy,
+		&iter_env->max_dependency_depth, cfg->target_fetch_policy))
 		return 0;
 	for(i=0; i<iter_env->max_dependency_depth+1; i++)
 		verbose(VERB_QUERY, "target fetch policy for level %d is %d",
@@ -170,7 +231,7 @@ iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)
 	}
 	if(cfg->caps_whitelist) {
 		if(!iter_env->caps_white)
-			iter_env->caps_white = rbtree_create(name_tree_compare);
+			iter_env->caps_white = caps_white_create();
 		if(!iter_env->caps_white || !caps_white_apply_cfg(
 			iter_env->caps_white, cfg)) {
 			log_err("Could not set capsforid whitelist");
@@ -179,31 +240,13 @@ iter_apply_cfg(struct iter_env* iter_env, struct config_file* cfg)

 	}

-	nat64_prefix = cfg->nat64_prefix;
-	if(!nat64_prefix)
-		nat64_prefix = cfg->dns64_prefix;
-	if(!nat64_prefix)
-		nat64_prefix = DEFAULT_NAT64_PREFIX;
-	if(!netblockstrtoaddr(nat64_prefix, 0, &iter_env->nat64_prefix_addr,
-		&iter_env->nat64_prefix_addrlen,
-		&iter_env->nat64_prefix_net)) {
-		log_err("cannot parse nat64-prefix netblock: %s", nat64_prefix);
-		return 0;
-	}
-	if(!addr_is_ip6(&iter_env->nat64_prefix_addr,
-		iter_env->nat64_prefix_addrlen)) {
-		log_err("nat64-prefix is not IPv6: %s", cfg->nat64_prefix);
-		return 0;
-	}
-	if(!prefixnet_is_nat64(iter_env->nat64_prefix_net)) {
-		log_err("nat64-prefix length it not 32, 40, 48, 56, 64 or 96: %s",
-			nat64_prefix);
+	if(!nat64_apply_cfg(&iter_env->nat64, cfg)) {
+		log_err("Could not setup nat64");
 		return 0;
 	}

 	iter_env->supports_ipv6 = cfg->do_ip6;
 	iter_env->supports_ipv4 = cfg->do_ip4;
-	iter_env->use_nat64 = cfg->do_nat64;
 	iter_env->outbound_msg_retry = cfg->outbound_msg_retry;
 	iter_env->max_sent_count = cfg->max_sent_count;
 	iter_env->max_query_restarts = cfg->max_query_restarts;
@@ -270,7 +313,7 @@ iter_filter_unsuitable(struct iter_env* iter_env, struct module_env* env,
 	if(!iter_env->supports_ipv6 && addr_is_ip6(&a->addr, a->addrlen)) {
 		return -1; /* there is no ip6 available */
 	}
-	if(!iter_env->supports_ipv4 && !iter_env->use_nat64 &&
+	if(!iter_env->supports_ipv4 && !iter_env->nat64.use_nat64 &&
 	   !addr_is_ip6(&a->addr, a->addrlen)) {
 		return -1; /* there is no ip4 available */
 	}
@@ -693,10 +736,11 @@ dns_copy_msg(struct dns_msg* from, struct regional* region)
 void
 iter_dns_store(struct module_env* env, struct query_info* msgqinf,
 	struct reply_info* msgrep, int is_referral, time_t leeway, int pside,
-	struct regional* region, uint16_t flags, time_t qstarttime)
+	struct regional* region, uint16_t flags, time_t qstarttime,
+	int is_valrec)
 {
 	if(!dns_cache_store(env, msgqinf, msgrep, is_referral, leeway,
-		pside, region, flags, qstarttime))
+		pside, region, flags, qstarttime, is_valrec))
 		log_err("out of memory: cannot store data in cache");
 }

@@ -1488,14 +1532,15 @@ iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,

 	/* check stub */
 	if (stub != NULL && stub->dp != NULL) {
+		enum verbosity_value level = VERB_ALGO;
 		int stub_no_cache = stub->dp->no_cache;
 		lock_rw_unlock(&qstate->env->fwds->lock);
-		if(stub_no_cache) {
-			char qname[255+1];
-			char dpname[255+1];
+		if(verbosity >= level && stub_no_cache) {
+			char qname[LDNS_MAX_DOMAINLEN];
+			char dpname[LDNS_MAX_DOMAINLEN];
 			dname_str(qinf->qname, qname);
 			dname_str(stub->dp->name, dpname);
-			verbose(VERB_ALGO, "stub for %s %s has no_cache", qname, dpname);
+			verbose(level, "stub for %s %s has no_cache", qname, dpname);
 		}
 		if(retdpname) {
 			if(stub->dp->namelen > dpname_storage_len) {
@@ -1516,14 +1561,15 @@ iter_stub_fwd_no_cache(struct module_qstate *qstate, struct query_info *qinf,

 	/* Check for forward. */
 	if (dp) {
+		enum verbosity_value level = VERB_ALGO;
 		int dp_no_cache = dp->no_cache;
 		lock_rw_unlock(&qstate->env->hints->lock);
-		if(dp_no_cache) {
-			char qname[255+1];
-			char dpname[255+1];
+		if(verbosity >= level && dp_no_cache) {
+			char qname[LDNS_MAX_DOMAINLEN];
+			char dpname[LDNS_MAX_DOMAINLEN];
 			dname_str(qinf->qname, qname);
 			dname_str(dp->name, dpname);
-			verbose(VERB_ALGO, "forward for %s %s has no_cache", qname, dpname);
+			verbose(level, "forward for %s %s has no_cache", qname, dpname);
 		}
 		if(retdpname) {
 			if(dp->namelen > dpname_storage_len) {
@@ -1564,3 +1610,54 @@ void iterator_set_ip46_support(struct module_stack* mods,
 	if(outnet->num_ip6 == 0)
 		ie->supports_ipv6 = 0;
 }
+
+void
+limit_nsec_ttl(struct dns_msg* msg)
+{
+	/* Limit NSEC and NSEC3 TTL in response, RFC9077 */
+	size_t i;
+	int found = 0;
+	time_t soa_ttl = 0;
+	/* Limit the NSEC and NSEC3 TTL values to the SOA TTL and SOA minimum
+	 * TTL. That has already been applied to the SOA record ttl. */
+	for(i=0; i<msg->rep->rrset_count; i++) {
+		struct ub_packed_rrset_key* s = msg->rep->rrsets[i];
+		if(ntohs(s->rk.type) == LDNS_RR_TYPE_SOA) {
+			struct packed_rrset_data* soadata = (struct packed_rrset_data*)s->entry.data;
+			found = 1;
+			soa_ttl = soadata->ttl;
+			break;
+		}
+	}
+	if(!found)
+		return;
+	for(i=0; i<msg->rep->rrset_count; i++) {
+		struct ub_packed_rrset_key* s = msg->rep->rrsets[i];
+		if(ntohs(s->rk.type) == LDNS_RR_TYPE_NSEC ||
+			ntohs(s->rk.type) == LDNS_RR_TYPE_NSEC3) {
+			struct packed_rrset_data* data = (struct packed_rrset_data*)s->entry.data;
+			/* Limit the negative TTL. */
+			if(data->ttl > soa_ttl) {
+				if(verbosity >= VERB_ALGO) {
+					char buf[256];
+					snprintf(buf, sizeof(buf),
+						"limiting TTL %d of %s record to the SOA TTL of %d for",
+						(int)data->ttl, ((ntohs(s->rk.type) == LDNS_RR_TYPE_NSEC)?"NSEC":"NSEC3"), (int)soa_ttl);
+					log_nametypeclass(VERB_ALGO, buf,
+						s->rk.dname, ntohs(s->rk.type),
+						ntohs(s->rk.rrset_class));
+				}
+				data->ttl = soa_ttl;
+			}
+		}
+	}
+}
+
+void
+iter_make_minimal(struct reply_info* rep)
+{
+	size_t rem = rep->ns_numrrsets + rep->ar_numrrsets;
+	rep->ns_numrrsets = 0;
+	rep->ar_numrrsets = 0;
+	rep->rrset_count -= rem;
+}
@@ -61,6 +61,7 @@ struct sock_list;
 struct ub_packed_rrset_key;
 struct module_stack;
 struct outside_network;
+struct iter_nat64;

 /* max number of lookups in the cache for target nameserver names.
 * This stops, for large delegations, N*N lookups in the cache. */
@@ -142,6 +143,7 @@ struct dns_msg* dns_copy_msg(struct dns_msg* from, struct regional* regional);
 * @param region: to copy modified (cache is better) rrs back to.
 * @param flags: with BIT_CD for dns64 AAAA translated queries.
 * @param qstarttime: time of query start.
+ * @param is_valrec: if the query is validation recursion and does not get
 * return void, because we are not interested in alloc errors,
 * 	the iterator and validator can operate on the results in their
 * 	scratch space (the qstate.region) and are not dependent on the cache.
@@ -150,7 +152,8 @@ struct dns_msg* dns_copy_msg(struct dns_msg* from, struct regional* regional);
 */
 void iter_dns_store(struct module_env* env, struct query_info* qinf,
 	struct reply_info* rep, int is_referral, time_t leeway, int pside,
-	struct regional* region, uint16_t flags, time_t qstarttime);
+	struct regional* region, uint16_t flags, time_t qstarttime,
+	int is_valrec);

 /**
 * Select randomly with n/m probability.
@@ -428,4 +431,55 @@ int iter_stub_fwd_no_cache(struct module_qstate *qstate,
 void iterator_set_ip46_support(struct module_stack* mods,
 	struct module_env* env, struct outside_network* outnet);

+/**
+ * Read config string that represents the target fetch policy.
+ * @param target_fetch_policy: alloced on return.
+ * @param max_dependency_depth: set on return.
+ * @param str: the config string
+ * @return false on failure.
+ */
+int read_fetch_policy(int** target_fetch_policy, int* max_dependency_depth,
+	const char* str);
+
+/**
+ * Create caps exempt data structure.
+ * @return NULL on failure.
+ */
+struct rbtree_type* caps_white_create(void);
+
+/**
+ * Delete caps exempt data structure.
+ * @param caps_white: caps exempt tree.
+ */
+void caps_white_delete(struct rbtree_type* caps_white);
+
+/**
+ * Apply config caps whitelist items to name tree
+ * @param ntree: caps exempt tree.
+ * @param cfg: config with options.
+ */
+int caps_white_apply_cfg(struct rbtree_type* ntree, struct config_file* cfg);
+
+/**
+ * Apply config for nat64
+ * @param nat64: the nat64 state.
+ * @param cfg: config with options.
+ * @return false on failure.
+ */
+int nat64_apply_cfg(struct iter_nat64* nat64, struct config_file* cfg);
+
+/**
+ * Limit NSEC and NSEC3 TTL in response, RFC9077
+ * @param msg: dns message, the SOA record ttl is used to restrict ttls
+ *	of NSEC and NSEC3 RRsets. If no SOA record, nothing happens.
+ */
+void limit_nsec_ttl(struct dns_msg* msg);
+
+/**
+ * Make the response minimal. Removed authority and additional section,
+ * that works when there is an answer in the answer section.
+ * @param rep: reply to modify.
+ */
+void iter_make_minimal(struct reply_info* rep);
+
 #endif /* ITERATOR_ITER_UTILS_H */
@@ -70,12 +70,16 @@
 #include "sldns/parseutil.h"
 #include "sldns/sbuffer.h"

+/* number of packets */
+int MAX_GLOBAL_QUOTA = 200;
 /* in msec */
 int UNKNOWN_SERVER_NICENESS = 376;
 /* in msec */
 int USEFUL_SERVER_TOP_TIMEOUT = 120000;
 /* Equals USEFUL_SERVER_TOP_TIMEOUT*4 */
 int BLACKLIST_PENALTY = (120000*4);
+/** Timeout when only a single probe query per IP is allowed. */
+int PROBE_MAXRTO = PROBE_MAXRTO_DEFAULT; /* in msec */

 static void target_count_increase_nx(struct iter_qstate* iq, int num);

@@ -103,16 +107,6 @@ iter_init(struct module_env* env, int id)
 	return 1;
 }

-/** delete caps_whitelist element */
-static void
-caps_free(struct rbnode_type* n, void* ATTR_UNUSED(d))
-{
-	if(n) {
-		free(((struct name_tree_node*)n)->name);
-		free(n);
-	}
-}
-
 void 
 iter_deinit(struct module_env* env, int id)
 {
@@ -124,10 +118,7 @@ iter_deinit(struct module_env* env, int id)
 	free(iter_env->target_fetch_policy);
 	priv_delete(iter_env->priv);
 	donotq_delete(iter_env->donotq);
-	if(iter_env->caps_white) {
-		traverse_postorder(iter_env->caps_white, caps_free, NULL);
-		free(iter_env->caps_white);
-	}
+	caps_white_delete(iter_env->caps_white);
 	free(iter_env);
 	env->modinfo[id] = NULL;
 }
@@ -252,11 +243,11 @@ error_supers(struct module_qstate* qstate, int id, struct module_qstate* super)
 		} else {
 			/* see if the failure did get (parent-lame) info */
 			if(!cache_fill_missing(super->env, super_iq->qchase.qclass,
-				super->region, super_iq->dp))
+				super->region, super_iq->dp, 0))
 				log_err("out of memory adding missing");
 		}
 		delegpt_mark_neg(dpns, qstate->qinfo.qtype);
-		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->use_nat64)) &&
+		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->nat64.use_nat64)) &&
 			(dpns->got6 == 2 || !ie->supports_ipv6)) {
 			dpns->resolved = 1; /* mark as failed */
 			target_count_increase_nx(super_iq, 1);
@@ -320,16 +311,21 @@ error_response_cache(struct module_qstate* qstate, int id, int rcode)
 		qstate->qinfo.qname, qstate->qinfo.qname_len,
 		qstate->qinfo.qtype, qstate->qinfo.qclass,
 		qstate->query_flags, 0,
-		qstate->env->cfg->serve_expired_ttl_reset)) != NULL) {
+		qstate->env->cfg->serve_expired)) != NULL) {
 		struct reply_info* rep = (struct reply_info*)msg->entry.data;
-		if(qstate->env->cfg->serve_expired &&
-			qstate->env->cfg->serve_expired_ttl_reset && rep &&
-			*qstate->env->now + qstate->env->cfg->serve_expired_ttl
-			> rep->serve_expired_ttl) {
-			verbose(VERB_ALGO, "reset serve-expired-ttl for "
+		if(qstate->env->cfg->serve_expired && rep) {
+			if(qstate->env->cfg->serve_expired_ttl_reset &&
+				*qstate->env->now + qstate->env->cfg->serve_expired_ttl
+				> rep->serve_expired_ttl) {
+				verbose(VERB_ALGO, "reset serve-expired-ttl for "
+					"response in cache");
+				rep->serve_expired_ttl = *qstate->env->now +
+					qstate->env->cfg->serve_expired_ttl;
+			}
+			verbose(VERB_ALGO, "set serve-expired-norec-ttl for "
 				"response in cache");
-			rep->serve_expired_ttl = *qstate->env->now +
-				qstate->env->cfg->serve_expired_ttl;
+			rep->serve_expired_norec_ttl = NORR_TTL +
+				*qstate->env->now;
 		}
 		if(rep && (FLAGS_GET_RCODE(rep->flags) ==
 			LDNS_RCODE_NOERROR ||
@@ -361,7 +357,7 @@ error_response_cache(struct module_qstate* qstate, int id, int rcode)
 	err.security = sec_status_indeterminate;
 	verbose(VERB_ALGO, "store error response in message cache");
 	iter_dns_store(qstate->env, &qstate->qinfo, &err, 0, 0, 0, NULL,
-		qstate->query_flags, qstate->qstarttime);
+		qstate->query_flags, qstate->qstarttime, qstate->is_valrec);
 	return error_response(qstate, id, rcode);
 }

@@ -407,8 +403,11 @@ iter_prepend(struct iter_qstate* iq, struct dns_msg* msg,
 	num_an = 0;
 	for(p = iq->an_prepend_list; p; p = p->next) {
 		sets[num_an++] = p->rrset;
-		if(ub_packed_rrset_ttl(p->rrset) < msg->rep->ttl)
+		if(ub_packed_rrset_ttl(p->rrset) < msg->rep->ttl) {
 			msg->rep->ttl = ub_packed_rrset_ttl(p->rrset);
+			msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
+			msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+		}
 	}
 	memcpy(sets+num_an, msg->rep->rrsets, msg->rep->an_numrrsets *
 		sizeof(struct ub_packed_rrset_key*));
@@ -421,8 +420,11 @@ iter_prepend(struct iter_qstate* iq, struct dns_msg* msg,
 			msg->rep->ns_numrrsets, p->rrset))
 			continue;
 		sets[msg->rep->an_numrrsets + num_an + num_ns++] = p->rrset;
-		if(ub_packed_rrset_ttl(p->rrset) < msg->rep->ttl)
+		if(ub_packed_rrset_ttl(p->rrset) < msg->rep->ttl) {
 			msg->rep->ttl = ub_packed_rrset_ttl(p->rrset);
+			msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
+			msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+		}
 	}
 	memcpy(sets + num_an + msg->rep->an_numrrsets + num_ns, 
 		msg->rep->rrsets + msg->rep->an_numrrsets, 
@@ -760,6 +762,14 @@ target_count_increase_nx(struct iter_qstate* iq, int num)
 		iq->target_count[TARGET_COUNT_NX] += num;
 }

+static void
+target_count_increase_global_quota(struct iter_qstate* iq, int num)
+{
+	target_count_create(iq);
+	if(iq->target_count)
+		iq->target_count[TARGET_COUNT_GLOBAL_QUOTA] += num;
+}
+
 /**
 * Generate a subrequest.
 * Generate a local request event. Local events are tied to this module, and
@@ -1071,7 +1081,7 @@ auth_zone_delegpt(struct module_qstate* qstate, struct iter_qstate* iq,
 			/* cache is blacklisted and fallback, and we
 			 * already have an auth_zone dp */
 			if(verbosity>=VERB_ALGO) {
-				char buf[255+1];
+				char buf[LDNS_MAX_DOMAINLEN];
 				dname_str(z->name, buf);
 				verbose(VERB_ALGO, "auth_zone %s "
 				  "fallback because cache blacklisted",
@@ -1088,7 +1098,7 @@ auth_zone_delegpt(struct module_qstate* qstate, struct iter_qstate* iq,
 				 * validation failure, and the zone allows
 				 * fallback to the internet, query there. */
 				if(verbosity>=VERB_ALGO) {
-					char buf[255+1];
+					char buf[LDNS_MAX_DOMAINLEN];
 					dname_str(z->name, buf);
 					verbose(VERB_ALGO, "auth_zone %s "
 					  "fallback because cache blacklisted",
@@ -1560,6 +1570,11 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 			errinf(qstate, "malloc failure for forward zone");
 			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 		}
+		if(!cache_fill_missing(qstate->env, iq->qchase.qclass,
+			qstate->region, iq->dp, 0)) {
+			errinf(qstate, "malloc failure, copy extra info into delegation point");
+			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
+		}
 		if((qstate->query_flags&BIT_RD)==0) {
 			/* If the server accepts RD=0 queries and forwards
 			 * with RD=1, then if the server is listed as an NS
@@ -1697,7 +1712,7 @@ processInitRequest(struct module_qstate* qstate, struct iter_qstate* iq,
 		 */
 		if(iter_dp_is_useless(&qstate->qinfo, qstate->query_flags,
 			iq->dp, ie->supports_ipv4, ie->supports_ipv6,
-			ie->use_nat64)) {
+			ie->nat64.use_nat64)) {
 			int have_dp = 0;
 			if(!can_have_last_resort(qstate->env, iq->dp->name, iq->dp->namelen, iq->qchase.qclass, &have_dp, &iq->dp, qstate->region)) {
 				if(have_dp) {
@@ -2007,7 +2022,7 @@ query_for_targets(struct module_qstate* qstate, struct iter_qstate* iq,
 		return 1;
 	if(iq->depth > 0 && iq->target_count &&
 		iq->target_count[TARGET_COUNT_QUERIES] > MAX_TARGET_COUNT) {
-		char s[LDNS_MAX_DOMAINLEN+1];
+		char s[LDNS_MAX_DOMAINLEN];
 		dname_str(qstate->qinfo.qname, s);
 		verbose(VERB_QUERY, "request %s has exceeded the maximum "
 			"number of glue fetches %d", s,
@@ -2015,7 +2030,7 @@ query_for_targets(struct module_qstate* qstate, struct iter_qstate* iq,
 		return 2;
 	}
 	if(iq->dp_target_count > MAX_DP_TARGET_COUNT) {
-		char s[LDNS_MAX_DOMAINLEN+1];
+		char s[LDNS_MAX_DOMAINLEN];
 		dname_str(qstate->qinfo.qname, s);
 		verbose(VERB_QUERY, "request %s has exceeded the maximum "
 			"number of glue fetches %d to a single delegation point",
@@ -2061,7 +2076,7 @@ query_for_targets(struct module_qstate* qstate, struct iter_qstate* iq,
 			if(mesh_jostle_exceeded(qstate->env->mesh)) {
 				/* If no ip4 query is possible, that makes
 				 * this ns resolved. */
-				if(!((ie->supports_ipv4 || ie->use_nat64) &&
+				if(!((ie->supports_ipv4 || ie->nat64.use_nat64) &&
 					((ns->lame && !ns->done_pside4) ||
 					(!ns->lame && !ns->got4)))) {
 					ns->resolved = 1;
@@ -2070,7 +2085,7 @@ query_for_targets(struct module_qstate* qstate, struct iter_qstate* iq,
 			}
 		}
 		/* Send the A request. */
-		if((ie->supports_ipv4 || ie->use_nat64) &&
+		if((ie->supports_ipv4 || ie->nat64.use_nat64) &&
 			((ns->lame && !ns->done_pside4) ||
 			(!ns->lame && !ns->got4))) {
 			if(!generate_target_query(qstate, iq, id, 
@@ -2137,6 +2152,15 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 		verbose(VERB_QUERY, "configured stub or forward servers failed -- returning SERVFAIL");
 		return error_response_cache(qstate, id, LDNS_RCODE_SERVFAIL);
 	}
+	if(qstate->env->cfg->harden_unverified_glue) {
+		if(!cache_fill_missing(qstate->env, iq->qchase.qclass,
+			qstate->region, iq->dp, PACKED_RRSET_UNVERIFIED_GLUE))
+			log_err("out of memory in cache_fill_missing");
+		if(iq->dp->usable_list) {
+			verbose(VERB_ALGO, "try unverified glue from cache");
+			return next_state(iq, QUERYTARGETS_STATE);
+		}
+	}
 	if(!iq->dp->has_parent_side_NS && dname_is_root(iq->dp->name)) {
 		struct delegpt* dp;
 		int nolock = 0;
@@ -2179,7 +2203,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 	/* see if that makes new names available */
 	if(!cache_fill_missing(qstate->env, iq->qchase.qclass, 
-		qstate->region, iq->dp))
+		qstate->region, iq->dp, 0))
 		log_err("out of memory in cache_fill_missing");
 	if(iq->dp->usable_list) {
 		verbose(VERB_ALGO, "try parent-side-name, w. glue from cache");
@@ -2217,7 +2241,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 	if(iq->depth > 0 && iq->target_count &&
 		iq->target_count[TARGET_COUNT_QUERIES] > MAX_TARGET_COUNT) {
-		char s[LDNS_MAX_DOMAINLEN+1];
+		char s[LDNS_MAX_DOMAINLEN];
 		dname_str(qstate->qinfo.qname, s);
 		verbose(VERB_QUERY, "request %s has exceeded the maximum "
 			"number of glue fetches %d", s,
@@ -2233,14 +2257,14 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 		/* if this nameserver is at a delegation point, but that
 		 * delegation point is a stub and we cannot go higher, skip*/
 		if( ((ie->supports_ipv6 && !ns->done_pside6) ||
-		    ((ie->supports_ipv4 || ie->use_nat64) && !ns->done_pside4)) &&
+		    ((ie->supports_ipv4 || ie->nat64.use_nat64) && !ns->done_pside4)) &&
 		    !can_have_last_resort(qstate->env, ns->name, ns->namelen,
 			iq->qchase.qclass, NULL, NULL, NULL)) {
 			log_nametypeclass(VERB_ALGO, "cannot pside lookup ns "
 				"because it is also a stub/forward,",
 				ns->name, LDNS_RR_TYPE_NS, iq->qchase.qclass);
 			if(ie->supports_ipv6) ns->done_pside6 = 1;
-			if(ie->supports_ipv4 || ie->use_nat64) ns->done_pside4 = 1;
+			if(ie->supports_ipv4 || ie->nat64.use_nat64) ns->done_pside4 = 1;
 			continue;
 		}
 		/* query for parent-side A and AAAA for nameservers */
@@ -2265,7 +2289,7 @@ processLastResort(struct module_qstate* qstate, struct iter_qstate* iq,
 				return 0;
 			}
 		}
-		if((ie->supports_ipv4 || ie->use_nat64) && !ns->done_pside4) {
+		if((ie->supports_ipv4 || ie->nat64.use_nat64) && !ns->done_pside4) {
 			/* Send the A request. */
 			if(!generate_parentside_target_query(qstate, iq, id, 
 				ns->name, ns->namelen, 
@@ -2534,7 +2558,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	}
 	if(!ie->supports_ipv6)
 		delegpt_no_ipv6(iq->dp);
-	if(!ie->supports_ipv4 && !ie->use_nat64)
+	if(!ie->supports_ipv4 && !ie->nat64.use_nat64)
 		delegpt_no_ipv4(iq->dp);
 	delegpt_log(VERB_ALGO, iq->dp);

@@ -2706,9 +2730,7 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 		if((iq->chase_flags&BIT_RD) && !(iq->response->rep->flags&BIT_AA)) {
 			verbose(VERB_ALGO, "forwarder, ignoring referral from auth zone");
 		} else {
-			lock_rw_wrlock(&qstate->env->auth_zones->lock);
-			qstate->env->auth_zones->num_query_up++;
-			lock_rw_unlock(&qstate->env->auth_zones->lock);
+			qstate->env->mesh->num_query_authzone_up++;
 			iq->num_current_queries++;
 			iq->chase_to_rd = 0;
 			iq->dnssec_lame_query = 0;
@@ -3008,6 +3030,17 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 		}
 	}

+	target_count_increase_global_quota(iq, 1);
+	if(iq->target_count && iq->target_count[TARGET_COUNT_GLOBAL_QUOTA]
+		> MAX_GLOBAL_QUOTA) {
+		char s[LDNS_MAX_DOMAINLEN];
+		dname_str(qstate->qinfo.qname, s);
+		verbose(VERB_QUERY, "request %s has exceeded the maximum "
+			"global quota on number of upstream queries %d", s,
+			iq->target_count[TARGET_COUNT_GLOBAL_QUOTA]);
+		return error_response_cache(qstate, id, LDNS_RCODE_SERVFAIL);
+	}
+
 	/* Do not check ratelimit for forwarding queries or if we already got a
 	 * pass. */
 	sq_check_ratelimit = (!(iq->chase_flags & BIT_RD) && !iq->ratelimit_ok);
@@ -3024,9 +3057,9 @@ processQueryTargets(struct module_qstate* qstate, struct iter_qstate* iq,
 	real_addr = target->addr;
 	real_addrlen = target->addrlen;

-	if(ie->use_nat64 && target->addr.ss_family == AF_INET) {
-		addr_to_nat64(&target->addr, &ie->nat64_prefix_addr,
-			ie->nat64_prefix_addrlen, ie->nat64_prefix_net,
+	if(ie->nat64.use_nat64 && target->addr.ss_family == AF_INET) {
+		addr_to_nat64(&target->addr, &ie->nat64.nat64_prefix_addr,
+			ie->nat64.nat64_prefix_addrlen, ie->nat64.nat64_prefix_net,
 			&real_addr, &real_addrlen);
 		log_name_addr(VERB_QUERY, "applied NAT64:",
 			iq->dp->name, &real_addr, real_addrlen);
@@ -3250,6 +3283,16 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			iq->num_target_queries = 0;
 			return processDSNSFind(qstate, iq, id);
 		}
+		if(iq->qchase.qtype == LDNS_RR_TYPE_DNSKEY && SERVE_EXPIRED
+			&& qstate->is_valrec &&
+			reply_find_answer_rrset(&iq->qchase, iq->response->rep) != NULL) {
+			/* clean out the authority section, if any, so it
+			 * does not overwrite dnssec valid data in the
+			 * validation recursion lookup. */
+			verbose(VERB_ALGO, "make DNSKEY minimal for serve "
+				"expired");
+			iter_make_minimal(iq->response->rep);
+		}
 		if(!qstate->no_cache_store)
 			iter_dns_store(qstate->env, &iq->response->qinfo,
 				iq->response->rep,
@@ -3257,7 +3300,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 				qstate->prefetch_leeway,
 				iq->dp&&iq->dp->has_parent_side_NS,
 				qstate->region, qstate->query_flags,
-				qstate->qstarttime);
+				qstate->qstarttime, qstate->is_valrec);
 		/* close down outstanding requests to be discarded */
 		outbound_list_clear(&iq->outlist);
 		iq->num_current_queries = 0;
@@ -3351,7 +3394,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			/* no prefetch-leeway, since its not the answer */
 			iter_dns_store(qstate->env, &iq->response->qinfo,
 				iq->response->rep, 1, 0, 0, NULL, 0,
-				qstate->qstarttime);
+				qstate->qstarttime, qstate->is_valrec);
 			if(iq->store_parent_NS)
 				iter_store_parentside_NS(qstate->env, 
 					iq->response->rep);
@@ -3400,7 +3443,7 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 				old_dp->name, old_dp->namelen);
 		}
 		if(!cache_fill_missing(qstate->env, iq->qchase.qclass, 
-			qstate->region, iq->dp)) {
+			qstate->region, iq->dp, 0)) {
 			errinf(qstate, "malloc failure, copy extra info into delegation point");
 			return error_response(qstate, id, LDNS_RCODE_SERVFAIL);
 		}
@@ -3481,7 +3524,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
 			iter_dns_store(qstate->env, &iq->response->qinfo,
 				iq->response->rep, 1, qstate->prefetch_leeway,
 				iq->dp&&iq->dp->has_parent_side_NS, NULL,
-				qstate->query_flags, qstate->qstarttime);
+				qstate->query_flags, qstate->qstarttime,
+				qstate->is_valrec);
 		/* set the current request's qname to the new value. */
 		iq->qchase.qname = sname;
 		iq->qchase.qname_len = snamelen;
@@ -3825,7 +3869,7 @@ processTargetResponse(struct module_qstate* qstate, int id,
 	} else {
 		verbose(VERB_ALGO, "iterator TargetResponse failed");
 		delegpt_mark_neg(dpns, qstate->qinfo.qtype);
-		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->use_nat64)) &&
+		if((dpns->got4 == 2 || (!ie->supports_ipv4 && !ie->nat64.use_nat64)) &&
 			(dpns->got6 == 2 || !ie->supports_ipv6)) {
 			dpns->resolved = 1; /* fail the target */
 			/* do not count cached answers */
@@ -3969,6 +4013,8 @@ processClassResponse(struct module_qstate* qstate, int id,
 			to->rep->prefetch_ttl = from->rep->prefetch_ttl;
 		if(from->rep->serve_expired_ttl < to->rep->serve_expired_ttl)
 			to->rep->serve_expired_ttl = from->rep->serve_expired_ttl;
+		if(from->rep->serve_expired_norec_ttl < to->rep->serve_expired_norec_ttl)
+			to->rep->serve_expired_norec_ttl = from->rep->serve_expired_norec_ttl;
 	}
 	/* are we done? */
 	foriq->num_current_queries --;
@@ -4106,7 +4152,7 @@ processFinished(struct module_qstate* qstate, struct iter_qstate* iq,
 				iq->response->rep, 0, qstate->prefetch_leeway,
 				iq->dp&&iq->dp->has_parent_side_NS,
 				qstate->region, qstate->query_flags,
-				qstate->qstarttime);
+				qstate->qstarttime, qstate->is_valrec);
 		}
 	}
 	qstate->return_rcode = LDNS_RCODE_NOERROR;
@@ -4286,6 +4332,7 @@ process_response(struct module_qstate* qstate, struct iter_qstate* iq,
 	}

 	/* Copy the edns options we may got from the back end */
+	qstate->edns_opts_back_in = NULL;
 	if(edns.opt_list_in) {
 		qstate->edns_opts_back_in = edns_opt_copy_region(edns.opt_list_in,
 			qstate->region);
@@ -4331,7 +4378,10 @@ process_response(struct module_qstate* qstate, struct iter_qstate* iq,
 	if(verbosity >= VERB_ALGO)
 		log_dns_msg("incoming scrubbed packet:", &iq->response->qinfo, 
 			iq->response->rep);
-	
+
+	if(qstate->env->cfg->aggressive_nsec) {
+		limit_nsec_ttl(iq->response);
+	}
 	if(event == module_event_capsfail || iq->caps_fallback) {
 		if(qstate->env->cfg->qname_minimisation &&
 			iq->minimisation_state != DONOT_MINIMISE_STATE) {
@@ -46,8 +46,6 @@
 #include "util/data/msgreply.h"
 #include "util/module.h"
 struct delegpt;
-struct iter_hints;
-struct iter_forwards;
 struct iter_donotq;
 struct iter_prep_list;
 struct iter_priv;
@@ -55,6 +53,9 @@ struct rbtree_type;

 /** max number of targets spawned for a query and its subqueries */
 #define MAX_TARGET_COUNT	64
+/** max number of upstream queries for a query and its subqueries, it is
+ * never reset. */
+extern int MAX_GLOBAL_QUOTA;
 /** max number of target lookups per qstate, per delegation point */
 #define MAX_DP_TARGET_COUNT	16
 /** max number of nxdomains allowed for target lookups for a query and
@@ -105,15 +106,9 @@ extern int BLACKLIST_PENALTY;
 #define EMPTY_NODATA_RETRY_COUNT 2

 /**
- * Global state for the iterator.
+ * Iterator global state for nat64.
 */
-struct iter_env {
-	/** A flag to indicate whether or not we have an IPv6 route */
-	int supports_ipv6;
-
-	/** A flag to indicate whether or not we have an IPv4 route */
-	int supports_ipv4;
-
+struct iter_nat64 {
 	/** A flag to locally apply NAT64 to make IPv4 addrs into IPv6 */
 	int use_nat64;

@@ -125,6 +120,20 @@ struct iter_env {

 	/** CIDR mask length of NAT64 prefix */
 	int nat64_prefix_net;
+};
+
+/**
+ * Global state for the iterator.
+ */
+struct iter_env {
+	/** A flag to indicate whether or not we have an IPv6 route */
+	int supports_ipv6;
+
+	/** A flag to indicate whether or not we have an IPv4 route */
+	int supports_ipv4;
+
+	/** State for nat64 */
+	struct iter_nat64 nat64;

 	/** A set of inetaddrs that should never be queried. */
 	struct iter_donotq* donotq;
@@ -248,6 +257,9 @@ enum target_count_variables {
 	TARGET_COUNT_QUERIES,
 	/** Number of nxdomain responses encountered. */
 	TARGET_COUNT_NX,
+	/** Global quota on number of queries to upstream servers per
+	 * client request, that is never reset. */
+	TARGET_COUNT_GLOBAL_QUOTA,

 	/** This should stay last here, it is used for the allocation */
 	TARGET_COUNT_MAX,
@@ -395,7 +395,7 @@ context_serialize_cancel(struct ctx_query* q, uint32_t* len)
 	/* format of cancel:
 	 * 	o uint32 cmd
 	 * 	o uint32 async-id */
-	uint8_t* p = (uint8_t*)reallocarray(NULL, sizeof(uint32_t), 2);
+	uint8_t* p = (uint8_t*)reallocarray(NULL, 2, sizeof(uint32_t));
 	if(!p) return NULL;
 	*len = 2*sizeof(uint32_t);
 	sldns_write_uint32(p, UB_LIBCMD_CANCEL);
@@ -292,6 +292,7 @@ libworker_do_cmd(struct libworker* w, uint8_t* msg, uint32_t len)
 			log_err("unknown command for bg worker %d", 
 				(int)context_serial_getcmd(msg, len));
 			/* and fall through to quit */
+			ATTR_FALLTHROUGH
 			/* fallthrough */
 		case UB_LIBCMD_QUIT:
 			free(msg);
@@ -422,7 +423,7 @@ int libworker_bg(struct ub_ctx* ctx)
 static int
 fill_canon(struct ub_result* res, uint8_t* s)
 {
-	char buf[255+2];
+	char buf[LDNS_MAX_DOMAINLEN];
 	dname_str(s, buf);
 	res->canonname = strdup(buf);
 	return res->canonname != 0;
@@ -1057,3 +1058,33 @@ void dtio_mainfdcallback(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
 	log_assert(0);
 }
 #endif
+
+void fast_reload_service_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+
+int fast_reload_client_callback(struct comm_point* ATTR_UNUSED(c),
+	void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
+        struct comm_reply* ATTR_UNUSED(repinfo))
+{
+	log_assert(0);
+	return 0;
+}
+
+#ifdef HAVE_NGTCP2
+void doq_client_event_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
+
+#ifdef HAVE_NGTCP2
+void doq_client_timer_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
@@ -30,6 +30,7 @@ def dnssecParse(domain, rrType=RR_TYPE_A):
 resolver = ub_ctx()
 resolver.add_ta(".   IN DS   19036 8 2 49AAC11D7B6F6446702E54A1607371607A1A41855200FD2CE1CDDE32F24E8FB5")
 resolver.add_ta(".   IN DS   20326 8 2 E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D")
+resolver.add_ta(".   IN DS   38696 8 2 683D2D0ACB8C9B712A1948B27F741219298D0A450D612C483AF444A4C0FB2B16")

 dnssecParse("nic.cz")
 dnssecParse("nonexistent-domain-blablabla.cz")
@@ -845,6 +845,16 @@ struct ub_server_stats {
 	long long qtls_resume;
 	/** RPZ action stats */
 	long long rpz_action[UB_STATS_RPZ_ACTION_NUM];
+	/** number of bytes in QUIC buffers */
+	long long mem_quic;
+	/** number of queries over (DNS over) QUIC */
+	long long qquic;
+	/** number of queries removed due to discard-timeout */
+	long long num_queries_discard_timeout;
+	/** number of queries removed due to wait-limit */
+	long long num_queries_wait_limit;
+	/** number of dns error reports generated */
+	long long num_dns_error_reports;
 };

 /**
@@ -176,6 +176,10 @@ config_file
   
      Harden against spoofed glue (out of zone data).
   
+   .. attribute:: harden_unverified_glue
+
+      Harden against unverified glue.
+
   .. attribute:: harden_dnssec_stripped
   
      Harden against receiving no DNSSEC data for trust anchor.
@@ -204,7 +204,7 @@ struct query_info {

 %inline %{
   PyObject* dnameAsStr(PyObject* dname) {
-       char buf[LDNS_MAX_DOMAINLEN+1];
+       char buf[LDNS_MAX_DOMAINLEN];
       buf[0] = '\0';
       dname_str((uint8_t*)PyBytes_AsString(dname), buf);
       return PyString_FromString(buf);
@@ -1009,6 +1009,7 @@ struct config_file {
   int harden_short_bufsize;
   int harden_large_queries;
   int harden_glue;
+   int harden_unverified_glue;
   int harden_dnssec_stripped;
   int harden_referral_path;
   int use_caps_bits_for_id;
@@ -73,7 +73,7 @@ int storeQueryInCache(struct module_qstate* qstate, struct query_info* qinfo,

 	return dns_cache_store(qstate->env, qinfo, msgrep, is_referral,
 		qstate->prefetch_leeway, 0, NULL, qstate->query_flags,
-		qstate->qstarttime);
+		qstate->qstarttime, qstate->is_valrec);
 }

 /* Invalidate the message associated with query_info stored in message cache */
@@ -105,6 +105,7 @@ respip_sockaddr_find_or_create(struct respip_set* set, struct sockaddr_storage*
 		socklen_t addrlen, int net, int create, const char* ipstr)
 {
 	struct resp_addr* node;
+	log_assert(set);
 	node = (struct resp_addr*)addr_tree_find(&set->ip_tree, addr, addrlen, net);
 	if(!node && create) {
 		node = regional_alloc_zero(set->region, sizeof(*node));
@@ -128,6 +129,7 @@ void
 respip_sockaddr_delete(struct respip_set* set, struct resp_addr* node)
 {
 	struct resp_addr* prev;
+	log_assert(set);
 	prev = (struct resp_addr*)rbtree_previous((struct rbnode_type*)node);	
 	lock_rw_destroy(&node->lock);
 	(void)rbtree_delete(&set->ip_tree, node);
@@ -146,6 +148,7 @@ respip_find_or_create(struct respip_set* set, const char* ipstr, int create)
 	struct sockaddr_storage addr;
 	int net;
 	socklen_t addrlen;
+	log_assert(set);

 	if(!netblockstrtoaddr(ipstr, 0, &addr, &addrlen, &net)) {
 		log_err("cannot parse netblock: '%s'", ipstr);
@@ -160,6 +163,7 @@ respip_tag_cfg(struct respip_set* set, const char* ipstr,
 	const uint8_t* taglist, size_t taglen)
 {
 	struct resp_addr* node;
+	log_assert(set);

 	if(!(node=respip_find_or_create(set, ipstr, 1)))
 		return 0;
@@ -183,6 +187,7 @@ respip_action_cfg(struct respip_set* set, const char* ipstr,
 {
 	struct resp_addr* node;
 	enum respip_action action;
+	log_assert(set);

 	if(!(node=respip_find_or_create(set, ipstr, 1)))
 		return 0;
@@ -325,6 +330,7 @@ static int
 respip_data_cfg(struct respip_set* set, const char* ipstr, const char* rrstr)
 {
 	struct resp_addr* node;
+	log_assert(set);

 	node=respip_find_or_create(set, ipstr, 0);
 	if(!node || node->action == respip_none) {
@@ -344,6 +350,7 @@ respip_set_apply_cfg(struct respip_set* set, char* const* tagname, int num_tags,
 	struct config_strbytelist* p;
 	struct config_str2list* pa;
 	struct config_str2list* pd;
+	log_assert(set);

 	set->tagname = tagname;
 	set->num_tags = num_tags;
@@ -609,6 +616,7 @@ respip_addr_lookup(const struct reply_info *rep, struct respip_set* rs,
 	struct resp_addr* ra;
 	struct sockaddr_storage ss;
 	socklen_t addrlen;
+	log_assert(rs);

 	lock_rw_rdlock(&rs->lock);
 	for(i=0; i<rep->an_numrrsets; i++) {
@@ -867,7 +875,8 @@ respip_rewrite_reply(const struct query_info* qinfo,
 	const struct respip_client_info* cinfo, const struct reply_info* rep,
 	struct reply_info** new_repp, struct respip_action_info* actinfo,
 	struct ub_packed_rrset_key** alias_rrset, int search_only,
-	struct regional* region, struct auth_zones* az, int* rpz_passthru)
+	struct regional* region, struct auth_zones* az, int* rpz_passthru,
+	struct views* views, struct respip_set* ipset)
 {
 	const uint8_t* ctaglist;
 	size_t ctaglen;
@@ -876,7 +885,6 @@ respip_rewrite_reply(const struct query_info* qinfo,
 	struct config_strlist** tag_datas;
 	size_t tag_datas_size;
 	struct view* view = NULL;
-	struct respip_set* ipset = NULL;
 	size_t rrset_id = 0, rr_id = 0;
 	enum respip_action action = respip_none;
 	int tag = -1;
@@ -899,8 +907,20 @@ respip_rewrite_reply(const struct query_info* qinfo,
 	tag_actions_size = cinfo->tag_actions_size;
 	tag_datas = cinfo->tag_datas;
 	tag_datas_size = cinfo->tag_datas_size;
-	view = cinfo->view;
-	ipset = cinfo->respip_set;
+	if(cinfo->view) {
+		view = cinfo->view;
+		lock_rw_rdlock(&view->lock);
+	} else if(cinfo->view_name) {
+		view = views_find_view(views, cinfo->view_name, 0);
+		if(!view) {
+			/* If the view no longer exists, the rewrite can not
+			 * be processed further. */
+			verbose(VERB_ALGO, "respip: failed because view %s no "
+				"longer exists", cinfo->view_name);
+			return 0;
+		}
+		/* The view is rdlocked by views_find_view. */
+	}

 	log_assert(ipset);

@@ -915,7 +935,6 @@ respip_rewrite_reply(const struct query_info* qinfo,
 	  * Note also that we assume 'view' is valid in this function, which
 	  * should be safe (see unbound bug #1191) */
 	if(view) {
-		lock_rw_rdlock(&view->lock);
 		if(view->respip_set) {
 			if((raddr = respip_addr_lookup(rep,
 				view->respip_set, &rrset_id, &rr_id))) {
@@ -961,7 +980,7 @@ respip_rewrite_reply(const struct query_info* qinfo,
 						struct sockaddr_storage ss;
 						socklen_t ss_len = 0;
 						char nm[256], ip[256];
-						char qn[255+1];
+						char qn[LDNS_MAX_DOMAINLEN];
 						if(!rdata2sockaddr(rep->rrsets[rrset_id]->entry.data, ntohs(rep->rrsets[rrset_id]->rk.type), rr_id, &ss, &ss_len))
 							snprintf(ip, sizeof(ip), "invalidRRdata");
 						else
@@ -1101,7 +1120,8 @@ respip_operate(struct module_qstate* qstate, enum module_ev event, int id,
 				qstate->client_info, qstate->return_msg->rep,
 				&new_rep, &actinfo, &alias_rrset, 0,
 				qstate->region, qstate->env->auth_zones,
-				&qstate->rpz_passthru)) {
+				&qstate->rpz_passthru, qstate->env->views,
+				qstate->env->respip_set)) {
 				goto servfail;
 			}
 			if(actinfo.action != respip_none) {
@@ -1149,7 +1169,8 @@ respip_merge_cname(struct reply_info* base_rep,
 	const struct query_info* qinfo, const struct reply_info* tgt_rep,
 	const struct respip_client_info* cinfo, int must_validate,
 	struct reply_info** new_repp, struct regional* region,
-	struct auth_zones* az)
+	struct auth_zones* az, struct views* views,
+	struct respip_set* respip_set)
 {
 	struct reply_info* new_rep;
 	struct reply_info* tmp_rep = NULL; /* just a placeholder */
@@ -1176,7 +1197,7 @@ respip_merge_cname(struct reply_info* base_rep,

 	/* see if the target reply would be subject to a response-ip action. */
 	if(!respip_rewrite_reply(qinfo, cinfo, tgt_rep, &tmp_rep, &actinfo,
-		&alias_rrset, 1, region, az, NULL))
+		&alias_rrset, 1, region, az, NULL, views, respip_set))
 		return 0;
 	if(actinfo.action != respip_none) {
 		log_info("CNAME target of redirect response-ip action would "
@@ -1229,7 +1250,8 @@ respip_inform_super(struct module_qstate* qstate, int id,
 	if(!respip_merge_cname(super->return_msg->rep, &qstate->qinfo,
 		qstate->return_msg->rep, super->client_info,
 		super->env->need_to_validate, &new_rep, super->region,
-		qstate->env->auth_zones))
+		qstate->env->auth_zones, qstate->env->views,
+		qstate->env->respip_set))
 		goto fail;
 	super->return_msg->rep = new_rep;
 	return;
@@ -1326,3 +1348,35 @@ respip_inform_print(struct respip_action_info* respip_actinfo, uint8_t* qname,
 		(actionstr) ? actionstr : "inform", srcip, port);
 	log_nametypeclass(NO_VERBOSE, txt, qname, qtype, qclass);
 }
+
+size_t respip_set_get_mem(struct respip_set* set)
+{
+	size_t m;
+	if(!set) return 0;
+	m = sizeof(*set);
+	lock_rw_rdlock(&set->lock);
+	m += regional_get_mem(set->region);
+	lock_rw_unlock(&set->lock);
+	return m;
+}
+
+void
+respip_set_swap_tree(struct respip_set* respip_set,
+	struct respip_set* data)
+{
+	rbnode_type* oldroot = respip_set->ip_tree.root;
+	size_t oldcount = respip_set->ip_tree.count;
+	struct regional* oldregion = respip_set->region;
+	char* const* oldtagname = respip_set->tagname;
+	int oldnum_tags = respip_set->num_tags;
+	respip_set->ip_tree.root = data->ip_tree.root;
+	respip_set->ip_tree.count = data->ip_tree.count;
+	respip_set->region = data->region;
+	respip_set->tagname = data->tagname;
+	respip_set->num_tags = data->num_tags;
+	data->ip_tree.root = oldroot;
+	data->ip_tree.count = oldcount;
+	data->region = oldregion;
+	data->tagname = oldtagname;
+	data->num_tags = oldnum_tags;
+}
@@ -23,7 +23,8 @@
 struct respip_set {
 	struct regional* region;
 	struct rbtree_type ip_tree;
-	lock_rw_type lock;	/* lock on the respip tree */
+	lock_rw_type lock;	/* lock on the respip tree. It is ordered
+		after views and before hints, stubs and local zones. */
 	char* const* tagname;	/* shallow copy of tag names, for logging */
 	int num_tags;		/* number of tagname entries */
 };
@@ -59,7 +60,6 @@ struct respip_addr_info;
 * This is essentially a subset of acl_addr (except for respip_set) but
 * defined as a separate structure to avoid dependency on the daemon-specific
 * structure.
- * respip_set is supposed to refer to the response-ip set for the global view.
 */
 struct respip_client_info {
 	uint8_t* taglist;
@@ -68,8 +68,12 @@ struct respip_client_info {
 	size_t tag_actions_size;
 	struct config_strlist** tag_datas;
 	size_t tag_datas_size;
+	/** The view for the action, during cache callback that is by
+	 * pointer. */
 	struct view* view;
-	struct respip_set* respip_set;
+	/** If from module query state, the view pointer is NULL, but the
+	 * name is stored in reference to the view. */
+	char* view_name;
 };

 /**
@@ -149,13 +153,16 @@ int respip_views_apply_cfg(struct views* vs, struct config_file* cfg,
 *   on error.
 * @param region: allocator to build *new_repp.
 * @param az: auth zones containing RPZ information.
+ * @param views: views tree to lookup view used.
+ * @param respip_set: the respip set for the global view.
 * @return 1 on success, 0 on error.
 */
 int respip_merge_cname(struct reply_info* base_rep,
 	const struct query_info* qinfo, const struct reply_info* tgt_rep,
 	const struct respip_client_info* cinfo, int must_validate,
 	struct reply_info** new_repp, struct regional* region,
-	struct auth_zones* az);
+	struct auth_zones* az, struct views* views,
+	struct respip_set* respip_set);

 /**
 * See if any IP-based action should apply to any IP address of AAAA/A answer
@@ -178,6 +185,8 @@ int respip_merge_cname(struct reply_info* base_rep,
 * @param region: allocator to build *new_repp.
 * @param rpz_passthru: keeps track of query state can have passthru that
 *   stops further rpz processing. Or NULL for cached answer processing.
+ * @param views: views tree to lookup view used.
+ * @param ipset: the respip set for the global view.
 * @return 1 on success, 0 on error.
 */
 int respip_rewrite_reply(const struct query_info* qinfo,
@@ -186,7 +195,7 @@ int respip_rewrite_reply(const struct query_info* qinfo,
 	struct respip_action_info* actinfo,
 	struct ub_packed_rrset_key** alias_rrset,
 	int search_only, struct regional* region, struct auth_zones* az,
-	int* rpz_passthru);
+	int* rpz_passthru, struct views* views, struct respip_set* ipset);

 /**
 * Get the response-ip function block.
@@ -302,4 +311,18 @@ respip_sockaddr_delete(struct respip_set* set, struct resp_addr* node);

 struct ub_packed_rrset_key*
 respip_copy_rrset(const struct ub_packed_rrset_key* key, struct regional* region);
+
+/** Get memory usage of respip set tree. The routine locks and unlocks the
+ * set for reading. */
+size_t respip_set_get_mem(struct respip_set* set);
+
+/**
+ * Swap internal tree with preallocated entries. Caller should manage
+ * the locks.
+ * @param respip_set: response ip tree
+ * @param data: preallocated information.
+ */
+void respip_set_swap_tree(struct respip_set* respip_set,
+	struct respip_set* data);
+
 #endif	/* RESPIP_RESPIP_H */
@@ -1578,7 +1578,7 @@ auth_zone_read_zonefile(struct auth_zone* z, struct config_file* cfg)
 		cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
 		zfilename += strlen(cfg->chrootdir);
 	if(verbosity >= VERB_ALGO) {
-		char nm[255+1];
+		char nm[LDNS_MAX_DOMAINLEN];
 		dname_str(z->name, nm);
 		verbose(VERB_ALGO, "read zonefile %s for %s", zfilename, nm);
 	}
@@ -1942,7 +1942,7 @@ static int auth_zone_zonemd_check_hash(struct auth_zone* z,
 					unsupported_reason = *reason;
 				/* continue to check for valid ZONEMD */
 				if(verbosity >= VERB_ALGO) {
-					char zstr[255+1];
+					char zstr[LDNS_MAX_DOMAINLEN];
 					dname_str(z->name, zstr);
 					verbose(VERB_ALGO, "auth-zone %s ZONEMD %d %d is unsupported: %s", zstr, (int)scheme, (int)hashalgo, *reason);
 				}
@@ -1950,7 +1950,7 @@ static int auth_zone_zonemd_check_hash(struct auth_zone* z,
 				continue;
 			}
 			if(verbosity >= VERB_ALGO) {
-				char zstr[255+1];
+				char zstr[LDNS_MAX_DOMAINLEN];
 				dname_str(z->name, zstr);
 				if(!*reason)
 					verbose(VERB_ALGO, "auth-zone %s ZONEMD hash is correct", zstr);
@@ -1973,7 +1973,7 @@ static int auth_zone_zonemd_check_hash(struct auth_zone* z,
 	if(!*reason)
 		*reason = "no ZONEMD records found";
 	if(verbosity >= VERB_ALGO) {
-		char zstr[255+1];
+		char zstr[LDNS_MAX_DOMAINLEN];
 		dname_str(z->name, zstr);
 		verbose(VERB_ALGO, "auth-zone %s ZONEMD failed: %s", zstr, *reason);
 	}
@@ -2317,9 +2317,6 @@ auth_free_masters(struct auth_master* list)
 	}
 }

-/** delete auth xfer structure
- * @param xfr: delete this xfer and its tasks.
- */
 void
 auth_xfer_delete(struct auth_xfer* xfr)
 {
@@ -3610,9 +3607,7 @@ int auth_zones_answer(struct auth_zones* az, struct module_env* env,
 			return 0;
 		}
 		lock_rw_unlock(&z->lock);
-		lock_rw_wrlock(&az->lock);
-		az->num_query_down++;
-		lock_rw_unlock(&az->lock);
+		env->mesh->num_query_authzone_down++;
 		auth_error_encode(qinfo, env, edns, repinfo, buf, temp,
 			LDNS_RCODE_SERVFAIL);
 		return 1;
@@ -3625,9 +3620,7 @@ int auth_zones_answer(struct auth_zones* az, struct module_env* env,
 		/* fallback to regular answering (recursive) */
 		return 0;
 	}
-	lock_rw_wrlock(&az->lock);
-	az->num_query_down++;
-	lock_rw_unlock(&az->lock);
+	env->mesh->num_query_authzone_down++;

 	/* encode answer */
 	if(!r)
@@ -3684,6 +3677,29 @@ auth_zone_parse_notify_serial(sldns_buffer* pkt, uint32_t *serial)
 	return 1;
 }

+/** print addr to str, and if not 53, append "@port_number", for logs. */
+static void addr_port_to_str(struct sockaddr_storage* addr, socklen_t addrlen,
+	char* buf, size_t len)
+{
+	uint16_t port = 0;
+	if(addr_is_ip6(addr, addrlen)) {
+		struct sockaddr_in6* sa = (struct sockaddr_in6*)addr;
+		port = ntohs((uint16_t)sa->sin6_port);
+	} else {
+		struct sockaddr_in* sa = (struct sockaddr_in*)addr;
+		port = ntohs((uint16_t)sa->sin_port);
+	}
+	if(port == UNBOUND_DNS_PORT) {
+		/* If it is port 53, print it plainly. */
+		addr_to_str(addr, addrlen, buf, len);
+	} else {
+		char a[256];
+		a[0]=0;
+		addr_to_str(addr, addrlen, a, sizeof(a));
+		snprintf(buf, len, "%s@%d", a, (int)port);
+	}
+}
+
 /** see if addr appears in the list */
 static int
 addr_in_list(struct auth_addr* list, struct sockaddr_storage* addr,
@@ -4780,8 +4796,8 @@ log_rrlist_position(const char* label, struct auth_chunk* rr_chunk,
 {
 	sldns_buffer pkt;
 	size_t dlen;
-	uint8_t buf[256];
-	char str[256];
+	uint8_t buf[LDNS_MAX_DOMAINLEN];
+	char str[LDNS_MAX_DOMAINLEN];
 	char typestr[32];
 	sldns_buffer_init_frm_data(&pkt, rr_chunk->data, rr_chunk->len);
 	sldns_buffer_set_position(&pkt, (size_t)(rr_dname -
@@ -5208,7 +5224,7 @@ xfr_write_after_update(struct auth_xfer* xfr, struct module_env* env)
 		cfg->chrootdir, strlen(cfg->chrootdir)) == 0)
 		zfilename += strlen(cfg->chrootdir);
 	if(verbosity >= VERB_ALGO) {
-		char nm[255+1];
+		char nm[LDNS_MAX_DOMAINLEN];
 		dname_str(z->name, nm);
 		verbose(VERB_ALGO, "write zonefile %s for %s", zfilename, nm);
 	}
@@ -5325,7 +5341,7 @@ xfr_process_chunk_list(struct auth_xfer* xfr, struct module_env* env,
 	/* holding z lock */
 	auth_zone_verify_zonemd(z, env, &env->mesh->mods, NULL, 0, 0);
 	if(z->zone_expired) {
-		char zname[256];
+		char zname[LDNS_MAX_DOMAINLEN];
 		/* ZONEMD must have failed */
 		/* reacquire locks, so we hold xfr lock on exit of routine,
 		 * and both xfr and z again after releasing xfr for potential
@@ -5357,7 +5373,7 @@ xfr_process_chunk_list(struct auth_xfer* xfr, struct module_env* env,
 	lock_rw_unlock(&z->lock);

 	if(verbosity >= VERB_QUERY && xfr->have_zone) {
-		char zname[256];
+		char zname[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, zname);
 		verbose(VERB_QUERY, "auth zone %s updated to serial %u", zname,
 			(unsigned)xfr->serial);
@@ -5419,7 +5435,7 @@ xfr_transfer_lookup_host(struct auth_xfer* xfr, struct module_env* env)
 	qinfo.local_alias = NULL;
 	if(verbosity >= VERB_ALGO) {
 		char buf1[512];
-		char buf2[LDNS_MAX_DOMAINLEN+1];
+		char buf2[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, buf2);
 		snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
 			" for task_transfer", buf2);
@@ -5475,7 +5491,7 @@ xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
 			/* the ones that are not in addr format are supposed
 			 * to be looked up.  The lookup has failed however,
 			 * so skip them */
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			log_err("%s: failed lookup, cannot transfer from master %s",
 				zname, master->host);
@@ -5514,18 +5530,18 @@ xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
 			&addr, addrlen, -1, master->ssl, master->host,
 			master->file, env->cfg);
 		if(!xfr->task_transfer->cp) {
-			char zname[255+1], as[256];
+			char zname[LDNS_MAX_DOMAINLEN], as[256];
 			dname_str(xfr->name, zname);
-			addr_to_str(&addr, addrlen, as, sizeof(as));
+			addr_port_to_str(&addr, addrlen, as, sizeof(as));
 			verbose(VERB_ALGO, "cannot create http cp "
 				"connection for %s to %s", zname, as);
 			return 0;
 		}
 		comm_timer_set(xfr->task_transfer->timer, &t);
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1], as[256];
+			char zname[LDNS_MAX_DOMAINLEN], as[256];
 			dname_str(xfr->name, zname);
-			addr_to_str(&addr, addrlen, as, sizeof(as));
+			addr_port_to_str(&addr, addrlen, as, sizeof(as));
 			verbose(VERB_ALGO, "auth zone %s transfer next HTTP fetch from %s started", zname, as);
 		}
 		/* Create or refresh the list of allow_notify addrs */
@@ -5546,18 +5562,18 @@ xfr_transfer_init_fetch(struct auth_xfer* xfr, struct module_env* env)
 		env->scratch_buffer, -1,
 		auth_name != NULL, auth_name);
 	if(!xfr->task_transfer->cp) {
-		char zname[255+1], as[256];
+		char zname[LDNS_MAX_DOMAINLEN], as[256];
 		dname_str(xfr->name, zname);
-		addr_to_str(&addr, addrlen, as, sizeof(as));
+		addr_port_to_str(&addr, addrlen, as, sizeof(as));
 		verbose(VERB_ALGO, "cannot create tcp cp connection for "
 			"xfr %s to %s", zname, as);
 		return 0;
 	}
 	comm_timer_set(xfr->task_transfer->timer, &t);
 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1], as[256];
+		char zname[LDNS_MAX_DOMAINLEN], as[256];
 		dname_str(xfr->name, zname);
-		addr_to_str(&addr, addrlen, as, sizeof(as));
+		addr_port_to_str(&addr, addrlen, as, sizeof(as));
 		verbose(VERB_ALGO, "auth zone %s transfer next %s fetch from %s started", zname, 
 			(xfr->task_transfer->on_ixfr?"IXFR":"AXFR"), as);
 	}
@@ -5579,7 +5595,7 @@ xfr_transfer_nexttarget_or_end(struct auth_xfer* xfr, struct module_env* env)
 			 * and that calls the callback just like a full
 			 * lookup and lookup failures also call callback */
 			if(verbosity >= VERB_ALGO) {
-				char zname[255+1];
+				char zname[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, zname);
 				verbose(VERB_ALGO, "auth zone %s transfer next target lookup", zname);
 			}
@@ -5602,7 +5618,7 @@ xfr_transfer_nexttarget_or_end(struct auth_xfer* xfr, struct module_env* env)
 		xfr_transfer_nextmaster(xfr);
 	}
 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1];
+		char zname[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, zname);
 		verbose(VERB_ALGO, "auth zone %s transfer failed, wait", zname);
 	}
@@ -5660,7 +5676,7 @@ xfr_master_add_addrs(struct auth_master* m, struct ub_packed_rrset_key* rrset,
 		}
 		if(verbosity >= VERB_ALGO) {
 			char s[64];
-			addr_to_str(&a->addr, a->addrlen, s, sizeof(s));
+			addr_port_to_str(&a->addr, a->addrlen, s, sizeof(s));
 			verbose(VERB_ALGO, "auth host %s lookup %s",
 				m->host, s);
 		}
@@ -5705,14 +5721,14 @@ void auth_xfer_transfer_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
 					lookup_target, answer, wanted_qtype);
 			} else {
 				if(verbosity >= VERB_ALGO) {
-					char zname[255+1];
+					char zname[LDNS_MAX_DOMAINLEN];
 					dname_str(xfr->name, zname);
 					verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup has nodata", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
 				}
 			}
 		} else {
 			if(verbosity >= VERB_ALGO) {
-				char zname[255+1];
+				char zname[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, zname);
 				verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup has no answer", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
 			}
@@ -5720,7 +5736,7 @@ void auth_xfer_transfer_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
 		regional_free_all(temp);
 	} else {
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			verbose(VERB_ALGO, "auth zone %s host %s type %s transfer lookup failed", zname, xfr->task_transfer->lookup_target->host, (xfr->task_transfer->lookup_aaaa?"AAAA":"A"));
 		}
@@ -6362,7 +6378,7 @@ xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
 			/* the ones that are not in addr format are supposed
 			 * to be looked up.  The lookup has failed however,
 			 * so skip them */
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			log_err("%s: failed lookup, cannot probe to master %s",
 				zname, master->host);
@@ -6404,9 +6420,9 @@ xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
 		xfr->task_probe->cp = outnet_comm_point_for_udp(env->outnet,
 			auth_xfer_probe_udp_callback, xfr, &addr, addrlen);
 		if(!xfr->task_probe->cp) {
-			char zname[255+1], as[256];
+			char zname[LDNS_MAX_DOMAINLEN], as[256];
 			dname_str(xfr->name, zname);
-			addr_to_str(&addr, addrlen, as, sizeof(as));
+			addr_port_to_str(&addr, addrlen, as, sizeof(as));
 			verbose(VERB_ALGO, "cannot create udp cp for "
 				"probe %s to %s", zname, as);
 			return 0;
@@ -6424,17 +6440,17 @@ xfr_probe_send_probe(struct auth_xfer* xfr, struct module_env* env,
 	/* send udp packet */
 	if(!comm_point_send_udp_msg(xfr->task_probe->cp, env->scratch_buffer,
 		(struct sockaddr*)&addr, addrlen, 0)) {
-		char zname[255+1], as[256];
+		char zname[LDNS_MAX_DOMAINLEN], as[256];
 		dname_str(xfr->name, zname);
-		addr_to_str(&addr, addrlen, as, sizeof(as));
+		addr_port_to_str(&addr, addrlen, as, sizeof(as));
 		verbose(VERB_ALGO, "failed to send soa probe for %s to %s",
 			zname, as);
 		return 0;
 	}
 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1], as[256];
+		char zname[LDNS_MAX_DOMAINLEN], as[256];
 		dname_str(xfr->name, zname);
-		addr_to_str(&addr, addrlen, as, sizeof(as));
+		addr_port_to_str(&addr, addrlen, as, sizeof(as));
 		verbose(VERB_ALGO, "auth zone %s soa probe sent to %s", zname,
 			as);
 	}
@@ -6463,7 +6479,7 @@ auth_xfer_probe_timer_callback(void* arg)
 	}

 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1];
+		char zname[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, zname);
 		verbose(VERB_ALGO, "auth zone %s soa probe timeout", zname);
 	}
@@ -6511,7 +6527,7 @@ auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err,
 			&serial)) {
 			/* successful lookup */
 			if(verbosity >= VERB_ALGO) {
-				char buf[256];
+				char buf[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, buf);
 				verbose(VERB_ALGO, "auth zone %s: soa probe "
 					"serial is %u", buf, (unsigned)serial);
@@ -6550,14 +6566,14 @@ auth_xfer_probe_udp_callback(struct comm_point* c, void* arg, int err,
 			}
 		} else {
 			if(verbosity >= VERB_ALGO) {
-				char buf[256];
+				char buf[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, buf);
 				verbose(VERB_ALGO, "auth zone %s: bad reply to soa probe", buf);
 			}
 		}
 	} else {
 		if(verbosity >= VERB_ALGO) {
-			char buf[256];
+			char buf[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, buf);
 			verbose(VERB_ALGO, "auth zone %s: soa probe failed", buf);
 		}
@@ -6614,7 +6630,7 @@ xfr_probe_lookup_host(struct auth_xfer* xfr, struct module_env* env)
 	qinfo.local_alias = NULL;
 	if(verbosity >= VERB_ALGO) {
 		char buf1[512];
-		char buf2[LDNS_MAX_DOMAINLEN+1];
+		char buf2[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, buf2);
 		snprintf(buf1, sizeof(buf1), "auth zone %s: master lookup"
 			" for task_probe", buf2);
@@ -6660,7 +6676,7 @@ xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
 			 * and that calls the callback just like a full
 			 * lookup and lookup failures also call callback */
 			if(verbosity >= VERB_ALGO) {
-				char zname[255+1];
+				char zname[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, zname);
 				verbose(VERB_ALGO, "auth zone %s probe next target lookup", zname);
 			}
@@ -6673,7 +6689,7 @@ xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
 	 * allow_notify addrs */
 	probe_copy_masters_for_allow_notify(xfr);
 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1];
+		char zname[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, zname);
 		verbose(VERB_ALGO, "auth zone %s probe: notify addrs updated", zname);
 	}
@@ -6681,7 +6697,7 @@ xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
 		/* only wanted lookups for copy, stop probe and start wait */
 		xfr->task_probe->only_lookup = 0;
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			verbose(VERB_ALGO, "auth zone %s probe: finished only_lookup", zname);
 		}
@@ -6707,7 +6723,7 @@ xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
 	if(xfr->task_probe->have_new_lease) {
 		/* if zone not updated, start the wait timer again */
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			verbose(VERB_ALGO, "auth_zone %s unchanged, new lease, wait", zname);
 		}
@@ -6718,7 +6734,7 @@ xfr_probe_send_or_end(struct auth_xfer* xfr, struct module_env* env)
 			xfr_set_timeout(xfr, env, 0, 0);
 	} else {
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			verbose(VERB_ALGO, "auth zone %s soa probe failed, wait to retry", zname);
 		}
@@ -6768,14 +6784,14 @@ void auth_xfer_probe_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
 					lookup_target, answer, wanted_qtype);
 			} else {
 				if(verbosity >= VERB_ALGO) {
-					char zname[255+1];
+					char zname[LDNS_MAX_DOMAINLEN];
 					dname_str(xfr->name, zname);
 					verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup has nodata", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
 				}
 			}
 		} else {
 			if(verbosity >= VERB_ALGO) {
-				char zname[255+1];
+				char zname[LDNS_MAX_DOMAINLEN];
 				dname_str(xfr->name, zname);
 				verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup has no address", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
 			}
@@ -6783,7 +6799,7 @@ void auth_xfer_probe_lookup_callback(void* arg, int rcode, sldns_buffer* buf,
 		regional_free_all(temp);
 	} else {
 		if(verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			verbose(VERB_ALGO, "auth zone %s host %s type %s probe lookup failed", zname, xfr->task_probe->lookup_target->host, (xfr->task_probe->lookup_aaaa?"AAAA":"A"));
 		}
@@ -6957,7 +6973,7 @@ xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
 		if(!xfr->task_nextprobe->timer) {
 			/* failed to malloc memory. likely zone transfer
 			 * also fails for that. skip the timeout */
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(xfr->name, zname);
 			log_err("cannot allocate timer, no refresh for %s",
 				zname);
@@ -6978,7 +6994,7 @@ xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
 			xfr->task_probe->only_lookup = 1;
 	}
 	if(verbosity >= VERB_ALGO) {
-		char zname[255+1];
+		char zname[LDNS_MAX_DOMAINLEN];
 		dname_str(xfr->name, zname);
 		verbose(VERB_ALGO, "auth zone %s timeout in %d seconds",
 			zname, (int)tv.tv_sec);
@@ -6987,6 +7003,18 @@ xfr_set_timeout(struct auth_xfer* xfr, struct module_env* env,
 	comm_timer_set(xfr->task_nextprobe->timer, &tv);
 }

+void auth_xfer_pickup_initial_zone(struct auth_xfer* x, struct module_env* env)
+{
+	/* set lease_time, because we now have timestamp in env,
+	 * (not earlier during startup and apply_cfg), and this
+	 * notes the start time when the data was acquired */
+	if(x->have_zone)
+		x->lease_time = *env->now;
+	if(x->task_nextprobe && x->task_nextprobe->worker == NULL) {
+		xfr_set_timeout(x, env, 0, 1);
+	}
+}
+
 /** initial pick up of worker timeouts, ties events to worker event loop */
 void
 auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env)
@@ -6995,14 +7023,7 @@ auth_xfer_pickup_initial(struct auth_zones* az, struct module_env* env)
 	lock_rw_wrlock(&az->lock);
 	RBTREE_FOR(x, struct auth_xfer*, &az->xtree) {
 		lock_basic_lock(&x->lock);
-		/* set lease_time, because we now have timestamp in env,
-		 * (not earlier during startup and apply_cfg), and this
-		 * notes the start time when the data was acquired */
-		if(x->have_zone)
-			x->lease_time = *env->now;
-		if(x->task_nextprobe && x->task_nextprobe->worker == NULL) {
-			xfr_set_timeout(x, env, 0, 1);
-		}
+		auth_xfer_pickup_initial_zone(x, env);
 		lock_basic_unlock(&x->lock);
 	}
 	lock_rw_unlock(&az->lock);
@@ -7765,7 +7786,7 @@ static void auth_zone_log(uint8_t* name, enum verbosity_value level,
 	va_list args;
 	va_start(args, format);
 	if(verbosity >= level) {
-		char str[255+1];
+		char str[LDNS_MAX_DOMAINLEN];
 		char msg[MAXSYSLOGMSGLEN];
 		dname_str(name, str);
 		vsnprintf(msg, sizeof(msg), format, args);
@@ -7967,7 +7988,7 @@ static int zonemd_check_dnssec_soazonemd(struct auth_zone* z,
 static void auth_zone_zonemd_fail(struct auth_zone* z, struct module_env* env,
 	char* reason, char* why_bogus, char** result)
 {
-	char zstr[255+1];
+	char zstr[LDNS_MAX_DOMAINLEN];
 	/* if fail: log reason, and depending on config also take action
 	 * and drop the zone, eg. it is gone from memory, set zone_expired */
 	dname_str(z->name, zstr);
@@ -8112,6 +8133,8 @@ auth_zone_verify_zonemd_with_key(struct auth_zone* z, struct module_env* env,
 * @param why_bogus: if the routine fails, returns the failure reason.
 * @param keystorage: where to store the ub_packed_rrset_key that is created
 * 	on success. A pointer to it is returned on success.
+ * @param reasonbuf: buffer to use for fail reason string print.
+ * @param reasonlen: length of reasonbuf.
 * @return the dnskey RRset, reference to zone data and keystorage, or
 * 	NULL on failure.
 */
@@ -8411,7 +8434,7 @@ zonemd_lookup_dnskey(struct auth_zone* z, struct module_env* env)
 	qinfo.local_alias = NULL;
 	if(verbosity >= VERB_ALGO) {
 		char buf1[512];
-		char buf2[LDNS_MAX_DOMAINLEN+1];
+		char buf2[LDNS_MAX_DOMAINLEN];
 		dname_str(z->name, buf2);
 		snprintf(buf1, sizeof(buf1), "auth zone %s: lookup %s "
 			"for zonemd verification", buf2,
@@ -8559,3 +8582,161 @@ void auth_zones_pickup_zonemd_verify(struct auth_zones* az,
 	}
 	lock_rw_unlock(&az->lock);
 }
+
+/** Get memory usage of auth rrset */
+static size_t
+auth_rrset_get_mem(struct auth_rrset* rrset)
+{
+	size_t m = sizeof(*rrset) + packed_rrset_sizeof(rrset->data);
+	return m;
+}
+
+/** Get memory usage of auth data */
+static size_t
+auth_data_get_mem(struct auth_data* node)
+{
+	size_t m = sizeof(*node) + node->namelen;
+	struct auth_rrset* rrset;
+	for(rrset = node->rrsets; rrset; rrset = rrset->next) {
+		m += auth_rrset_get_mem(rrset);
+	}
+	return m;
+}
+
+/** Get memory usage of auth zone */
+static size_t
+auth_zone_get_mem(struct auth_zone* z)
+{
+	size_t m = sizeof(*z) + z->namelen;
+	struct auth_data* node;
+	if(z->zonefile)
+		m += strlen(z->zonefile)+1;
+	RBTREE_FOR(node, struct auth_data*, &z->data) {
+		m += auth_data_get_mem(node);
+	}
+	if(z->rpz)
+		m += rpz_get_mem(z->rpz);
+	return m;
+}
+
+/** Get memory usage of list of auth addr */
+static size_t
+auth_addrs_get_mem(struct auth_addr* list)
+{
+	size_t m = 0;
+	struct auth_addr* a;
+	for(a = list; a; a = a->next) {
+		m += sizeof(*a);
+	}
+	return m;
+}
+
+/** Get memory usage of list of primaries for auth xfer */
+static size_t
+auth_primaries_get_mem(struct auth_master* list)
+{
+	size_t m = 0;
+	struct auth_master* n;
+	for(n = list; n; n = n->next) {
+		m += sizeof(*n);
+		m += auth_addrs_get_mem(n->list);
+		if(n->host)
+			m += strlen(n->host)+1;
+		if(n->file)
+			m += strlen(n->file)+1;
+	}
+	return m;
+}
+
+/** Get memory usage or list of auth chunks */
+static size_t
+auth_chunks_get_mem(struct auth_chunk* list)
+{
+	size_t m = 0;
+	struct auth_chunk* chunk;
+	for(chunk = list; chunk; chunk = chunk->next) {
+		m += sizeof(*chunk) + chunk->len;
+	}
+	return m;
+}
+
+/** Get memory usage of auth xfer */
+static size_t
+auth_xfer_get_mem(struct auth_xfer* xfr)
+{
+	size_t m = sizeof(*xfr) + xfr->namelen;
+
+	/* auth_nextprobe */
+	m += comm_timer_get_mem(xfr->task_nextprobe->timer);
+
+	/* auth_probe */
+	m += auth_primaries_get_mem(xfr->task_probe->masters);
+	m += comm_point_get_mem(xfr->task_probe->cp);
+	m += comm_timer_get_mem(xfr->task_probe->timer);
+
+	/* auth_transfer */
+	m += auth_chunks_get_mem(xfr->task_transfer->chunks_first);
+	m += auth_primaries_get_mem(xfr->task_transfer->masters);
+	m += comm_point_get_mem(xfr->task_transfer->cp);
+	m += comm_timer_get_mem(xfr->task_transfer->timer);
+
+	/* allow_notify_list */
+	m += auth_primaries_get_mem(xfr->allow_notify_list);
+
+	return m;
+}
+
+/** Get memory usage of auth zones ztree */
+static size_t
+az_ztree_get_mem(struct auth_zones* az)
+{
+	size_t m = 0;
+	struct auth_zone* z;
+	RBTREE_FOR(z, struct auth_zone*, &az->ztree) {
+		lock_rw_rdlock(&z->lock);
+		m += auth_zone_get_mem(z);
+		lock_rw_unlock(&z->lock);
+	}
+	return m;
+}
+
+/** Get memory usage of auth zones xtree */
+static size_t
+az_xtree_get_mem(struct auth_zones* az)
+{
+	size_t m = 0;
+	struct auth_xfer* xfr;
+	RBTREE_FOR(xfr, struct auth_xfer*, &az->xtree) {
+		lock_basic_lock(&xfr->lock);
+		m += auth_xfer_get_mem(xfr);
+		lock_basic_unlock(&xfr->lock);
+	}
+	return m;
+}
+
+size_t auth_zones_get_mem(struct auth_zones* zones)
+{
+	size_t m;
+	if(!zones) return 0;
+	m = sizeof(*zones);
+	lock_rw_rdlock(&zones->rpz_lock);
+	lock_rw_rdlock(&zones->lock);
+	m += az_ztree_get_mem(zones);
+	m += az_xtree_get_mem(zones);
+	lock_rw_unlock(&zones->lock);
+	lock_rw_unlock(&zones->rpz_lock);
+	return m;
+}
+
+void xfr_disown_tasks(struct auth_xfer* xfr, struct worker* worker)
+{
+	if(xfr->task_nextprobe->worker == worker) {
+		xfr_nextprobe_disown(xfr);
+	}
+	if(xfr->task_probe->worker == worker) {
+		xfr_probe_disown(xfr);
+	}
+	if(xfr->task_transfer->worker == worker) {
+		xfr_transfer_disown(xfr);
+	}
+}
@@ -70,7 +70,8 @@ struct auth_chunk;
 * Authoritative zones, shared.
 */
 struct auth_zones {
-	/** lock on the authzone trees */
+	/** lock on the authzone trees. It is locked after views, respip,
+	 * local_zones and before fwds and stubs. */
 	lock_rw_type lock;
 	/** rbtree of struct auth_zone */
 	rbtree_type ztree;
@@ -78,10 +79,6 @@ struct auth_zones {
 	rbtree_type xtree;
 	/** do we have downstream enabled */
 	int have_downstream;
-	/** number of queries upstream */
-	size_t num_query_up;
-	/** number of queries downstream */
-	size_t num_query_down;
 	/** first auth zone containing rpz item in linked list */
 	struct auth_zone* rpz_first;
 	/** rw lock for rpz linked list, needed when iterating or editing linked
@@ -211,7 +208,9 @@ struct auth_xfer {
 	 * one of the tasks. 
 	 * Once it has the task assigned to it, the worker can access the
 	 * other elements of the task structure without a lock, because that
-	 * is necessary for the eventloop and callbacks from that. */
+	 * is necessary for the eventloop and callbacks from that.
+	 * The auth_zone->lock is locked before this lock.
+	 */
 	lock_basic_type lock;

 	/** zone name, in uncompressed wireformat */
@@ -787,4 +786,33 @@ void auth_zonemd_dnskey_lookup_callback(void* arg, int rcode,
 void auth_zones_pickup_zonemd_verify(struct auth_zones* az,
 	struct module_env* env);

+/** Get memory usage for auth zones. The routine locks and unlocks
+ * for reading. */
+size_t auth_zones_get_mem(struct auth_zones* zones);
+
+/**
+ * Initial pick up of the auth zone nextprobe timeout and that turns
+ * into further zone transfer work, if any. Also sets the lease time.
+ * @param x: xfer structure, locked by caller.
+ * @param env: environment of the worker that picks up the task.
+ */
+void auth_xfer_pickup_initial_zone(struct auth_xfer* x,
+	struct module_env* env);
+
+/**
+ * Delete auth xfer structure
+ * @param xfr: delete this xfer and its tasks.
+ */
+void auth_xfer_delete(struct auth_xfer* xfr);
+
+/**
+ * Disown tasks from the xfr that belong to this worker.
+ * Only tasks for the worker in question, the comm point and timer
+ * delete functions need to run in the thread of that worker to be
+ * able to delete the callback from the event base.
+ * @param xfr: xfr structure
+ * @param worker: the worker for which to stop tasks.
+ */
+void xfr_disown_tasks(struct auth_xfer* xfr, struct worker* worker);
+
 #endif /* SERVICES_AUTHZONE_H */
@@ -88,7 +88,7 @@ store_rrsets(struct module_env* env, struct reply_info* rep, time_t now,
 		/* update ref if it was in the cache */
 		switch(rrset_cache_update(env->rrset_cache, &rep->ref[i],
 				env->alloc, ((ntohs(rep->ref[i].key->rk.type)==
-				LDNS_RR_TYPE_NS && !pside)?qstarttime:now + leeway))) {
+				LDNS_RR_TYPE_NS && !pside)?qstarttime:now) + leeway)) {
 		case 0: /* ref unchanged, item inserted */
 			break;
 		case 2: /* ref updated, cache is superior */
@@ -110,6 +110,7 @@ store_rrsets(struct module_env* env, struct reply_info* rep, time_t now,
 			/* no break: also copy key item */
 			/* the line below is matched by gcc regex and silences
 			 * the fallthrough warning */
+			ATTR_FALLTHROUGH
 			/* fallthrough */
 		case 1: /* ref updated, item inserted */
 			rep->rrsets[i] = rep->ref[i].key;
@@ -161,7 +162,7 @@ dns_cache_store_msg(struct module_env* env, struct query_info* qinfo,
 	size_t i;

 	/* store RRsets */
-        for(i=0; i<rep->rrset_count; i++) {
+	for(i=0; i<rep->rrset_count; i++) {
 		rep->ref[i].key = rep->rrsets[i];
 		rep->ref[i].id = rep->rrsets[i]->id;
 	}
@@ -196,6 +197,7 @@ dns_cache_store_msg(struct module_env* env, struct query_info* qinfo,
 	reply_info_sortref(rep);
 	if(!(e = query_info_entrysetup(qinfo, rep, hash))) {
 		log_err("store_msg: malloc failed");
+		reply_info_delete(rep, NULL);
 		return;
 	}
 	slabhash_insert(env->msg_cache, hash, &e->entry, rep, env->alloc);
@@ -345,6 +347,13 @@ find_add_addrs(struct module_env* env, uint16_t qclass,
 			 * not use dns64 translation */
 			neg = msg_cache_lookup(env, ns->name, ns->namelen,
 				LDNS_RR_TYPE_AAAA, qclass, 0, now, 0);
+			/* Because recursion for lookup uses BIT_CD, check
+			 * for that so it stops the recursion lookup, if a
+			 * negative answer is cached. Because the cache uses
+			 * the CD flag for type AAAA. */
+			if(!neg)
+				neg = msg_cache_lookup(env, ns->name, ns->namelen,
+					LDNS_RR_TYPE_AAAA, qclass, BIT_CD, now, 0);
 			if(neg) {
 				delegpt_add_neg_msg(dp, neg);
 				lock_rw_unlock(&neg->entry.lock);
@@ -357,7 +366,7 @@ find_add_addrs(struct module_env* env, uint16_t qclass,
 /** find and add A and AAAA records for missing nameservers in delegpt */
 int
 cache_fill_missing(struct module_env* env, uint16_t qclass, 
-	struct regional* region, struct delegpt* dp)
+	struct regional* region, struct delegpt* dp, uint32_t flags)
 {
 	struct delegpt_ns* ns;
 	struct msgreply_entry* neg;
@@ -368,7 +377,7 @@ cache_fill_missing(struct module_env* env, uint16_t qclass,
 			continue;
 		ns->cache_lookup_count++;
 		akey = rrset_cache_lookup(env->rrset_cache, ns->name, 
-			ns->namelen, LDNS_RR_TYPE_A, qclass, 0, now, 0);
+			ns->namelen, LDNS_RR_TYPE_A, qclass, flags, now, 0);
 		if(akey) {
 			if(!delegpt_add_rrset_A(dp, region, akey, ns->lame,
 				NULL)) {
@@ -389,7 +398,7 @@ cache_fill_missing(struct module_env* env, uint16_t qclass,
 			}
 		}
 		akey = rrset_cache_lookup(env->rrset_cache, ns->name, 
-			ns->namelen, LDNS_RR_TYPE_AAAA, qclass, 0, now, 0);
+			ns->namelen, LDNS_RR_TYPE_AAAA, qclass, flags, now, 0);
 		if(akey) {
 			if(!delegpt_add_rrset_AAAA(dp, region, akey, ns->lame,
 				NULL)) {
@@ -404,6 +413,13 @@ cache_fill_missing(struct module_env* env, uint16_t qclass,
 			 * not use dns64 translation */
 			neg = msg_cache_lookup(env, ns->name, ns->namelen,
 				LDNS_RR_TYPE_AAAA, qclass, 0, now, 0);
+			/* Because recursion for lookup uses BIT_CD, check
+			 * for that so it stops the recursion lookup, if a
+			 * negative answer is cached. Because the cache uses
+			 * the CD flag for type AAAA. */
+			if(!neg)
+				neg = msg_cache_lookup(env, ns->name, ns->namelen,
+					LDNS_RR_TYPE_AAAA, qclass, BIT_CD, now, 0);
 			if(neg) {
 				delegpt_add_neg_msg(dp, neg);
 				lock_rw_unlock(&neg->entry.lock);
@@ -592,22 +608,8 @@ tomsg(struct module_env* env, struct query_info* q, struct reply_info* r,
 	time_t now_control = now;
 	if(now > r->ttl) {
 		/* Check if we are allowed to serve expired */
-		if(allow_expired) {
-			if(env->cfg->serve_expired_ttl &&
-				r->serve_expired_ttl < now) {
-				return NULL;
-			}
-			/* Ignore expired failure answers */
-			if(FLAGS_GET_RCODE(r->flags) !=
-				LDNS_RCODE_NOERROR &&
-				FLAGS_GET_RCODE(r->flags) !=
-				LDNS_RCODE_NXDOMAIN &&
-				FLAGS_GET_RCODE(r->flags) !=
-				LDNS_RCODE_YXDOMAIN)
-				return 0;
-		} else {
+		if(!allow_expired || !reply_info_can_answer_expired(r, now))
 			return NULL;
-		}
 		/* Change the current time so we can pass the below TTL checks when
 		 * serving expired data. */
 		now_control = r->ttl - env->cfg->serve_expired_reply_ttl;
@@ -626,6 +628,7 @@ tomsg(struct module_env* env, struct query_info* q, struct reply_info* r,
 	else
 		msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
 	msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+	msg->rep->serve_expired_norec_ttl = 0;
 	msg->rep->security = r->security;
 	msg->rep->an_numrrsets = r->an_numrrsets;
 	msg->rep->ns_numrrsets = r->ns_numrrsets;
@@ -709,6 +712,7 @@ rrset_msg(struct ub_packed_rrset_key* rrset, struct regional* region,
 	msg->rep->ttl = d->ttl - now;
 	msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
 	msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+	msg->rep->serve_expired_norec_ttl = 0;
 	msg->rep->security = sec_status_unchecked;
 	msg->rep->an_numrrsets = 1;
 	msg->rep->ns_numrrsets = 0;
@@ -748,6 +752,7 @@ synth_dname_msg(struct ub_packed_rrset_key* rrset, struct regional* region,
 	msg->rep->ttl = d->ttl - now;
 	msg->rep->prefetch_ttl = PREFETCH_TTL_CALC(msg->rep->ttl);
 	msg->rep->serve_expired_ttl = msg->rep->ttl + SERVE_EXPIRED_TTL;
+	msg->rep->serve_expired_norec_ttl = 0;
 	msg->rep->security = sec_status_unchecked;
 	msg->rep->an_numrrsets = 1;
 	msg->rep->ns_numrrsets = 0;
@@ -1051,10 +1056,76 @@ dns_cache_lookup(struct module_env* env,

 int
 dns_cache_store(struct module_env* env, struct query_info* msgqinf,
-        struct reply_info* msgrep, int is_referral, time_t leeway, int pside,
-	struct regional* region, uint32_t flags, time_t qstarttime)
+	struct reply_info* msgrep, int is_referral, time_t leeway, int pside,
+	struct regional* region, uint32_t flags, time_t qstarttime,
+	int is_valrec)
 {
 	struct reply_info* rep = NULL;
+	if(SERVE_EXPIRED) {
+		/* We are serving expired records. Before caching, check if a
+		 * useful expired record exists. */
+		struct msgreply_entry* e = msg_cache_lookup(env,
+			msgqinf->qname, msgqinf->qname_len, msgqinf->qtype,
+			msgqinf->qclass, flags, 0, 1);
+		if(e) {
+			struct reply_info* cached = e->entry.data;
+			if(cached->ttl < *env->now
+				&& reply_info_could_use_expired(cached, *env->now)
+				/* If we are validating make sure only
+				 * validating modules can update such messages.
+				 * In that case don't cache it and let a
+				 * subsequent module handle the caching. For
+				 * example, the iterator should not replace an
+				 * expired secure answer with a fresh unchecked
+				 * one and let the validator manage caching. */
+				&& cached->security != sec_status_bogus
+				&& (env->need_to_validate &&
+				msgrep->security == sec_status_unchecked)
+				/* Exceptions to that rule are:
+				 * o recursions that don't need validation but
+				 *   need to update the cache for coherence
+				 *   (delegation information while iterating,
+				 *   DNSKEY and DS lookups from validator)
+				 * o explicit RRSIG queries that are not
+				 *   validated. */
+				&& !is_valrec
+				&& msgqinf->qtype != LDNS_RR_TYPE_RRSIG) {
+				if((int)FLAGS_GET_RCODE(msgrep->flags) !=
+					LDNS_RCODE_NOERROR &&
+					(int)FLAGS_GET_RCODE(msgrep->flags) !=
+					LDNS_RCODE_NXDOMAIN) {
+					/* The current response has an
+					 * erroneous rcode. Adjust norec time
+					 * so that additional lookups are not
+					 * performed for some time. */
+					verbose(VERB_ALGO, "set "
+						"serve-expired-norec-ttl for "
+						"response in cache");
+					cached->serve_expired_norec_ttl =
+						NORR_TTL + *env->now;
+					if(env->cfg->serve_expired_ttl_reset &&
+					    cached->serve_expired_ttl
+					    < *env->now +
+					    env->cfg->serve_expired_ttl) {
+						/* Reset serve-expired-ttl for
+						 * valid response in cache. */
+						verbose(VERB_ALGO, "reset "
+							"serve-expired-ttl "
+							"for response in cache");
+						cached->serve_expired_ttl =
+						    *env->now +
+						    env->cfg->serve_expired_ttl;
+					}
+				}
+				verbose(VERB_ALGO, "a validated expired entry "
+					"could be overwritten, skip caching "
+					"the new message at this stage");
+				lock_rw_unlock(&e->entry.lock);
+				return 1;
+			}
+			lock_rw_unlock(&e->entry.lock);
+		}
+	}
 	/* alloc, malloc properly (not in region, like msg is) */
 	rep = reply_info_copy(msgrep, env->alloc, NULL);
 	if(!rep)
@@ -90,11 +90,14 @@ struct dns_msg {
 *   (See DNSCACHE_STORE_xxx flags).
 * @param qstarttime: time when the query was started, and thus when the
 * 	delegations were looked up.
+ * @param is_valrec: if the query is validation recursion and does not get
+ *	dnssec validation itself.
 * @return 0 on alloc error (out of memory).
 */
 int dns_cache_store(struct module_env* env, struct query_info* qinf,
        struct reply_info* rep, int is_referral, time_t leeway, int pside,
-	struct regional* region, uint32_t flags, time_t qstarttime);
+	struct regional* region, uint32_t flags, time_t qstarttime,
+	int is_valrec);

 /**
 * Store message in the cache. Stores in message cache and rrset cache.
@@ -202,10 +205,11 @@ struct dns_msg* dns_cache_lookup(struct module_env* env,
 * @param qclass: which class to look in.
 * @param region: where to store new dp info.
 * @param dp: delegation point to fill missing entries.
+ * @param flags: rrset flags, or 0.
 * @return false on alloc failure.
 */
 int cache_fill_missing(struct module_env* env, uint16_t qclass, 
-	struct regional* region, struct delegpt* dp);
+	struct regional* region, struct delegpt* dp, uint32_t flags);

 /**
 * Utility, create new, unpacked data structure for cache response.
@@ -52,24 +52,6 @@
 #include "util/config_file.h"
 #include "iterator/iterator.h"

-/** Timeout when only a single probe query per IP is allowed. */
-#define PROBE_MAXRTO 12000 /* in msec */
-
-/** number of timeouts for a type when the domain can be blocked ;
- * even if another type has completely rtt maxed it, the different type
- * can do this number of packets (until those all timeout too) */
-#define TIMEOUT_COUNT_MAX 3
-
-/** Minus 1000 because that is outside of the RTTBAND, so
- * blacklisted servers stay blacklisted if this is chosen.
- * If USEFUL_SERVER_TOP_TIMEOUT is below 1000 (configured via RTT_MAX_TIMEOUT,
- * infra-cache-max-rtt) change it to just above the RTT_BAND. */
-#define STILL_USEFUL_TIMEOUT (				\
-	USEFUL_SERVER_TOP_TIMEOUT < 1000 ||		\
-	USEFUL_SERVER_TOP_TIMEOUT - 1000 <= RTT_BAND	\
-		?RTT_BAND + 1				\
-		:USEFUL_SERVER_TOP_TIMEOUT - 1000)
-
 /** ratelimit value for delegation point */
 int infra_dp_ratelimit = 0;

@@ -82,6 +64,20 @@ int infra_ip_ratelimit = 0;
 *  For clients with a valid DNS Cookie. */
 int infra_ip_ratelimit_cookie = 0;

+/** Minus 1000 because that is outside of the RTTBAND, so
+ * blacklisted servers stay blacklisted if this is chosen.
+ * If USEFUL_SERVER_TOP_TIMEOUT is below 1000 (configured via RTT_MAX_TIMEOUT,
+ * infra-cache-max-rtt) change it to just above the RTT_BAND. */
+int
+still_useful_timeout()
+{
+	return
+	USEFUL_SERVER_TOP_TIMEOUT < 1000 ||
+	USEFUL_SERVER_TOP_TIMEOUT - 1000 <= RTT_BAND
+		?RTT_BAND + 1
+		:USEFUL_SERVER_TOP_TIMEOUT - 1000;
+}
+
 size_t 
 infra_sizefunc(void* k, void* ATTR_UNUSED(d))
 {
@@ -165,7 +161,7 @@ rate_deldatafunc(void* d, void* ATTR_UNUSED(arg))

 /** find or create element in domainlimit tree */
 static struct domain_limit_data* domain_limit_findcreate(
-	struct infra_cache* infra, char* name)
+	struct rbtree_type* domain_limits, char* name)
 {
 	uint8_t* nm;
 	int labs;
@@ -181,8 +177,8 @@ static struct domain_limit_data* domain_limit_findcreate(
 	labs = dname_count_labels(nm);

 	/* can we find it? */
-	d = (struct domain_limit_data*)name_tree_find(&infra->domain_limits,
-		nm, nmlen, labs, LDNS_RR_CLASS_IN);
+	d = (struct domain_limit_data*)name_tree_find(domain_limits, nm,
+		nmlen, labs, LDNS_RR_CLASS_IN);
 	if(d) {
 		free(nm);
 		return d;
@@ -201,8 +197,8 @@ static struct domain_limit_data* domain_limit_findcreate(
 	d->node.dclass = LDNS_RR_CLASS_IN;
 	d->lim = -1;
 	d->below = -1;
-	if(!name_tree_insert(&infra->domain_limits, &d->node, nm, nmlen,
-		labs, LDNS_RR_CLASS_IN)) {
+	if(!name_tree_insert(domain_limits, &d->node, nm, nmlen, labs,
+		LDNS_RR_CLASS_IN)) {
 		log_err("duplicate element in domainlimit tree");
 		free(nm);
 		free(d);
@@ -212,19 +208,19 @@ static struct domain_limit_data* domain_limit_findcreate(
 }

 /** insert rate limit configuration into lookup tree */
-static int infra_ratelimit_cfg_insert(struct infra_cache* infra,
+static int infra_ratelimit_cfg_insert(struct rbtree_type* domain_limits,
 	struct config_file* cfg)
 {
 	struct config_str2list* p;
 	struct domain_limit_data* d;
 	for(p = cfg->ratelimit_for_domain; p; p = p->next) {
-		d = domain_limit_findcreate(infra, p->str);
+		d = domain_limit_findcreate(domain_limits, p->str);
 		if(!d)
 			return 0;
 		d->lim = atoi(p->str2);
 	}
 	for(p = cfg->ratelimit_below_domain; p; p = p->next) {
-		d = domain_limit_findcreate(infra, p->str);
+		d = domain_limit_findcreate(domain_limits, p->str);
 		if(!d)
 			return 0;
 		d->below = atoi(p->str2);
@@ -232,24 +228,21 @@ static int infra_ratelimit_cfg_insert(struct infra_cache* infra,
 	return 1;
 }

-/** setup domain limits tree (0 on failure) */
-static int
-setup_domain_limits(struct infra_cache* infra, struct config_file* cfg)
+int
+setup_domain_limits(struct rbtree_type* domain_limits, struct config_file* cfg)
 {
-	name_tree_init(&infra->domain_limits);
-	if(!infra_ratelimit_cfg_insert(infra, cfg)) {
+	name_tree_init(domain_limits);
+	if(!infra_ratelimit_cfg_insert(domain_limits, cfg)) {
 		return 0;
 	}
-	name_tree_init_parents(&infra->domain_limits);
+	name_tree_init_parents(domain_limits);
 	return 1;
 }

 /** find or create element in wait limit netblock tree */
 static struct wait_limit_netblock_info*
-wait_limit_netblock_findcreate(struct infra_cache* infra, char* str,
-	int cookie)
+wait_limit_netblock_findcreate(struct rbtree_type* tree, char* str)
 {
-	rbtree_type* tree;
 	struct sockaddr_storage addr;
 	int net;
 	socklen_t addrlen;
@@ -261,10 +254,6 @@ wait_limit_netblock_findcreate(struct infra_cache* infra, char* str,
 	}

 	/* can we find it? */
-	if(cookie)
-		tree = &infra->wait_limits_cookie_netblock;
-	else
-		tree = &infra->wait_limits_netblock;
 	d = (struct wait_limit_netblock_info*)addr_tree_find(tree, &addr,
 		addrlen, net);
 	if(d)
@@ -286,19 +275,21 @@ wait_limit_netblock_findcreate(struct infra_cache* infra, char* str,

 /** insert wait limit information into lookup tree */
 static int
-infra_wait_limit_netblock_insert(struct infra_cache* infra,
-	struct config_file* cfg)
+infra_wait_limit_netblock_insert(rbtree_type* wait_limits_netblock,
+        rbtree_type* wait_limits_cookie_netblock, struct config_file* cfg)
 {
 	struct config_str2list* p;
 	struct wait_limit_netblock_info* d;
 	for(p = cfg->wait_limit_netblock; p; p = p->next) {
-		d = wait_limit_netblock_findcreate(infra, p->str, 0);
+		d = wait_limit_netblock_findcreate(wait_limits_netblock,
+			p->str);
 		if(!d)
 			return 0;
 		d->limit = atoi(p->str2);
 	}
 	for(p = cfg->wait_limit_cookie_netblock; p; p = p->next) {
-		d = wait_limit_netblock_findcreate(infra, p->str, 1);
+		d = wait_limit_netblock_findcreate(wait_limits_cookie_netblock,
+			p->str);
 		if(!d)
 			return 0;
 		d->limit = atoi(p->str2);
@@ -306,16 +297,48 @@ infra_wait_limit_netblock_insert(struct infra_cache* infra,
 	return 1;
 }

-/** setup wait limits tree (0 on failure) */
+/** Add a default wait limit netblock */
 static int
-setup_wait_limits(struct infra_cache* infra, struct config_file* cfg)
+wait_limit_netblock_default(struct rbtree_type* tree, char* str, int limit)
 {
-	addr_tree_init(&infra->wait_limits_netblock);
-	addr_tree_init(&infra->wait_limits_cookie_netblock);
-	if(!infra_wait_limit_netblock_insert(infra, cfg))
+	struct wait_limit_netblock_info* d;
+	d = wait_limit_netblock_findcreate(tree, str);
+	if(!d)
 		return 0;
-	addr_tree_init_parents(&infra->wait_limits_netblock);
-	addr_tree_init_parents(&infra->wait_limits_cookie_netblock);
+	d->limit = limit;
+	return 1;
+}
+
+int
+setup_wait_limits(rbtree_type* wait_limits_netblock,
+	rbtree_type* wait_limits_cookie_netblock, struct config_file* cfg)
+{
+	addr_tree_init(wait_limits_netblock);
+	addr_tree_init(wait_limits_cookie_netblock);
+
+	/* Insert defaults */
+	/* The loopback address is separated from the rest of the network. */
+	/* wait-limit-netblock: 127.0.0.0/8 -1 */
+	if(!wait_limit_netblock_default(wait_limits_netblock, "127.0.0.0/8",
+		-1))
+		return 0;
+	/* wait-limit-netblock: ::1/128 -1 */
+	if(!wait_limit_netblock_default(wait_limits_netblock, "::1/128", -1))
+		return 0;
+	/* wait-limit-cookie-netblock: 127.0.0.0/8 -1 */
+	if(!wait_limit_netblock_default(wait_limits_cookie_netblock,
+		"127.0.0.0/8", -1))
+		return 0;
+	/* wait-limit-cookie-netblock: ::1/128 -1 */
+	if(!wait_limit_netblock_default(wait_limits_cookie_netblock,
+		"::1/128", -1))
+		return 0;
+
+	if(!infra_wait_limit_netblock_insert(wait_limits_netblock,
+		wait_limits_cookie_netblock, cfg))
+		return 0;
+	addr_tree_init_parents(wait_limits_netblock);
+	addr_tree_init_parents(wait_limits_cookie_netblock);
 	return 1;
 }

@@ -348,11 +371,12 @@ infra_create(struct config_file* cfg)
 		return NULL;
 	}
 	/* insert config data into ratelimits */
-	if(!setup_domain_limits(infra, cfg)) {
+	if(!setup_domain_limits(&infra->domain_limits, cfg)) {
 		infra_delete(infra);
 		return NULL;
 	}
-	if(!setup_wait_limits(infra, cfg)) {
+	if(!setup_wait_limits(&infra->wait_limits_netblock,
+		&infra->wait_limits_cookie_netblock, cfg)) {
 		infra_delete(infra);
 		return NULL;
 	}
@@ -377,12 +401,29 @@ static void domain_limit_free(rbnode_type* n, void* ATTR_UNUSED(arg))
 	}
 }

+void
+domain_limits_free(struct rbtree_type* domain_limits)
+{
+	if(!domain_limits)
+		return;
+	traverse_postorder(domain_limits, domain_limit_free, NULL);
+}
+
 /** delete wait_limit_netblock_info entries */
 static void wait_limit_netblock_del(rbnode_type* n, void* ATTR_UNUSED(arg))
 {
 	free(n);
 }

+void
+wait_limits_free(struct rbtree_type* wait_limits_tree)
+{
+	if(!wait_limits_tree)
+		return;
+	traverse_postorder(wait_limits_tree, wait_limit_netblock_del,
+		NULL);
+}
+
 void 
 infra_delete(struct infra_cache* infra)
 {
@@ -390,12 +431,10 @@ infra_delete(struct infra_cache* infra)
 		return;
 	slabhash_delete(infra->hosts);
 	slabhash_delete(infra->domain_rates);
-	traverse_postorder(&infra->domain_limits, domain_limit_free, NULL);
+	domain_limits_free(&infra->domain_limits);
 	slabhash_delete(infra->client_ip_rates);
-	traverse_postorder(&infra->wait_limits_netblock,
-		wait_limit_netblock_del, NULL);
-	traverse_postorder(&infra->wait_limits_cookie_netblock,
-		wait_limit_netblock_del, NULL);
+	wait_limits_free(&infra->wait_limits_netblock);
+	wait_limits_free(&infra->wait_limits_cookie_netblock);
 	free(infra);
 }

@@ -426,7 +465,7 @@ infra_adjust(struct infra_cache* infra, struct config_file* cfg)
 		/* reapply domain limits */
 		traverse_postorder(&infra->domain_limits, domain_limit_free,
 			NULL);
-		if(!setup_domain_limits(infra, cfg)) {
+		if(!setup_domain_limits(&infra->domain_limits, cfg)) {
 			infra_delete(infra);
 			return NULL;
 		}
@@ -668,7 +707,7 @@ infra_update_tcp_works(struct infra_cache* infra,
 	if(data->rtt.rto >= RTT_MAX_TIMEOUT)
 		/* do not disqualify this server altogether, it is better
 		 * than nothing */
-		data->rtt.rto = STILL_USEFUL_TIMEOUT;
+		data->rtt.rto = still_useful_timeout();
 	lock_rw_unlock(&e->lock);
 }

@@ -808,7 +847,7 @@ infra_get_lame_rtt(struct infra_cache* infra,
 		&& infra->infra_keep_probing) {
 		/* single probe, keep probing */
 		if(*rtt >= USEFUL_SERVER_TOP_TIMEOUT)
-			*rtt = STILL_USEFUL_TIMEOUT;
+			*rtt = still_useful_timeout();
 	} else if(host->rtt.rto >= PROBE_MAXRTO && timenow < host->probedelay
 		&& rtt_notimeout(&host->rtt)*4 <= host->rtt.rto) {
 		/* single probe for this domain, and we are not probing */
@@ -816,15 +855,15 @@ infra_get_lame_rtt(struct infra_cache* infra,
 		if(qtype == LDNS_RR_TYPE_A) {
 			if(host->timeout_A >= TIMEOUT_COUNT_MAX)
 				*rtt = USEFUL_SERVER_TOP_TIMEOUT;
-			else	*rtt = STILL_USEFUL_TIMEOUT;
+			else	*rtt = still_useful_timeout();
 		} else if(qtype == LDNS_RR_TYPE_AAAA) {
 			if(host->timeout_AAAA >= TIMEOUT_COUNT_MAX)
 				*rtt = USEFUL_SERVER_TOP_TIMEOUT;
-			else	*rtt = STILL_USEFUL_TIMEOUT;
+			else	*rtt = still_useful_timeout();
 		} else {
 			if(host->timeout_other >= TIMEOUT_COUNT_MAX)
 				*rtt = USEFUL_SERVER_TOP_TIMEOUT;
-			else	*rtt = STILL_USEFUL_TIMEOUT;
+			else	*rtt = still_useful_timeout();
 		}
 	}
 	/* expired entry */
@@ -832,7 +871,7 @@ infra_get_lame_rtt(struct infra_cache* infra,
 		/* see if this can be a re-probe of an unresponsive server */
 		if(host->rtt.rto >= USEFUL_SERVER_TOP_TIMEOUT) {
 			lock_rw_unlock(&e->lock);
-			*rtt = STILL_USEFUL_TIMEOUT;
+			*rtt = still_useful_timeout();
 			*lame = 0;
 			*dnsseclame = 0;
 			*reclame = 0;
@@ -1081,7 +1120,8 @@ int infra_ratelimit_inc(struct infra_cache* infra, uint8_t* name,
 		lock_rw_unlock(&entry->lock);

 		if(premax <= lim && max > lim) {
-			char buf[257], qnm[257], ts[12], cs[12], ip[128];
+			char buf[LDNS_MAX_DOMAINLEN], qnm[LDNS_MAX_DOMAINLEN];
+			char ts[12], cs[12], ip[128];
 			dname_str(name, buf);
 			dname_str(qinfo->qname, qnm);
 			sldns_wire2str_type_buf(qinfo->qtype, ts, sizeof(ts));
@@ -52,6 +52,19 @@
 struct slabhash;
 struct config_file;

+/** number of timeouts for a type when the domain can be blocked ;
+ * even if another type has completely rtt maxed it, the different type
+ * can do this number of packets (until those all timeout too) */
+#define TIMEOUT_COUNT_MAX 3
+
+
+/** Timeout when only a single probe query per IP is allowed.
+ *  Any RTO above this number is considered a probe.
+ *  It is synchronized (caped) with USEFUL_SERVER_TOP_TIMEOUT so that probing
+ *  keeps working even if that configurable number drops below the default
+ *  12000 ms of probing. */
+extern int PROBE_MAXRTO;
+
 /**
 * Host information kept for every server, per zone.
 */
@@ -502,4 +515,22 @@ void infra_wait_limit_inc(struct infra_cache* infra, struct comm_reply* rep,
 void infra_wait_limit_dec(struct infra_cache* infra, struct comm_reply* rep,
 	struct config_file* cfg);

+/** setup wait limits tree (0 on failure) */
+int setup_wait_limits(struct rbtree_type* wait_limits_netblock,
+	struct rbtree_type* wait_limits_cookie_netblock,
+	struct config_file* cfg);
+
+/** Free the wait limits and wait cookie limits tree. */
+void wait_limits_free(struct rbtree_type* wait_limits_tree);
+
+/** setup domain limits tree (0 on failure) */
+int setup_domain_limits(struct rbtree_type* domain_limits,
+	struct config_file* cfg);
+
+/** Free the domain limits tree. */
+void domain_limits_free(struct rbtree_type* domain_limits);
+
+/** exported for unit test */
+int still_useful_timeout();
+
 #endif /* SERVICES_CACHE_INFRA_H */
@@ -128,8 +128,8 @@ need_to_update_rrset(void* nd, void* cd, time_t timenow, int equal, int ns)
 {
 	struct packed_rrset_data* newd = (struct packed_rrset_data*)nd;
 	struct packed_rrset_data* cached = (struct packed_rrset_data*)cd;
-	/*	o if new data is expired, current data is better */
-	if( newd->ttl < timenow && cached->ttl >= timenow)
+	/*	o if new data is expired, cached data is better */
+	if( newd->ttl < timenow && timenow <= cached->ttl)
 		return 0;
 	/* 	o store if rrset has been validated 
 	 *  		everything better than bogus data 
@@ -140,9 +140,9 @@ need_to_update_rrset(void* nd, void* cd, time_t timenow, int equal, int ns)
 	if( cached->security == sec_status_bogus && 
 		newd->security != sec_status_bogus && !equal)
 		return 1;
-        /*      o if current RRset is more trustworthy - insert it */
+        /*      o if new RRset is more trustworthy - insert it */
        if( newd->trust > cached->trust ) {
-		/* if the cached rrset is bogus, and this one equal,
+		/* if the cached rrset is bogus, and new is equal,
 		 * do not update the TTL - let it expire. */
 		if(equal && cached->ttl >= timenow && 
 			cached->security == sec_status_bogus)
@@ -155,7 +155,7 @@ need_to_update_rrset(void* nd, void* cd, time_t timenow, int equal, int ns)
 	/*  o same trust, but different in data - insert it */
 	if( newd->trust == cached->trust && !equal ) {
 		/* if this is type NS, do not 'stick' to owner that changes
-		 * the NS RRset, but use the old TTL for the new data, and
+		 * the NS RRset, but use the cached TTL for the new data, and
 		 * update to fetch the latest data. ttl is not expired, because
 		 * that check was before this one. */
 		if(ns) {
@@ -43,10 +43,16 @@
 #define LISTEN_DNSPORT_H

 #include "util/netevent.h"
+#include "util/rbtree.h"
+#include "util/locks.h"
 #include "daemon/acl_list.h"
 #ifdef HAVE_NGHTTP2_NGHTTP2_H
 #include <nghttp2/nghttp2.h>
 #endif
+#ifdef HAVE_NGTCP2
+#include <ngtcp2/ngtcp2.h>
+#include <ngtcp2/ngtcp2_crypto.h>
+#endif
 struct listen_list;
 struct config_file;
 struct addrinfo;
@@ -100,7 +106,9 @@ enum listen_type {
 	/** udp ipv6 (v4mapped) for use with ancillary data + dnscrypt*/
 	listen_type_udpancil_dnscrypt,
 	/** HTTP(2) over TLS over TCP */
-	listen_type_http
+	listen_type_http,
+	/** DNS over QUIC */
+	listen_type_doq
 };

 /*
@@ -186,8 +194,13 @@ int resolve_interface_names(char** ifs, int num_ifs,
 * @param http_endpoint: HTTP endpoint to service queries on
 * @param http_notls: no TLS for http downstream
 * @param tcp_conn_limit: TCP connection limit info.
- * @param sslctx: nonNULL if ssl context.
+ * @param dot_sslctx: nonNULL if dot ssl context.
+ * @param doh_sslctx: nonNULL if doh ssl context.
+ * @param quic_sslctx: nonNULL if quic ssl context.
 * @param dtenv: nonNULL if dnstap enabled.
+ * @param doq_table: the doq connection table, with shared information.
+ * @param rnd: random state.
+ * @param cfg: config file struct.
 * @param cb: callback function when a request arrives. It is passed
 *	  the packet and user argument. Return true to send a reply.
 * @param cb_arg: user data argument for callback function.
@@ -198,8 +211,11 @@ listen_create(struct comm_base* base, struct listen_port* ports,
 	size_t bufsize, int tcp_accept_count, int tcp_idle_timeout,
 	int harden_large_queries, uint32_t http_max_streams,
 	char* http_endpoint, int http_notls, struct tcl_list* tcp_conn_limit,
-	void* sslctx, struct dt_env* dtenv, comm_point_callback_type* cb,
-	void *cb_arg);
+	void* dot_sslctx, void* doh_sslctx, void* quic_sslctx,
+	struct dt_env* dtenv,
+	struct doq_table* doq_table,
+	struct ub_randstate* rnd,struct config_file* cfg,
+	comm_point_callback_type* cb, void *cb_arg);

 /**
 * delete the listening structure
@@ -278,11 +294,12 @@ int create_udp_sock(int family, int socktype, struct sockaddr* addr,
 * @param freebind: set IP_FREEBIND socket option.
 * @param use_systemd: if true, fetch sockets from systemd.
 * @param dscp: DSCP to use.
+ * @param additional: additional log information for the socket type.
 * @return: the socket. -1 on error.
 */
 int create_tcp_accept_sock(struct addrinfo *addr, int v6only, int* noproto,
 	int* reuseport, int transparent, int mss, int nodelay, int freebind,
-	int use_systemd, int dscp);
+	int use_systemd, int dscp, const char* additional);

 /**
 * Create and bind local listening socket
@@ -452,6 +469,383 @@ int http2_submit_dns_response(struct http2_session* h2_session);
 int http2_submit_dns_response(void* v);
 #endif /* HAVE_NGHTTP2 */

+#ifdef HAVE_NGTCP2
+struct doq_conid;
+struct doq_server_socket;
+
+/**
+ * DoQ shared connection table. This is the connections for the host.
+ * And some config parameter values for connections. The host has to
+ * respond on that ip,port for those connections, so they are shared
+ * between threads.
+ */
+struct doq_table {
+	/** the lock on the tree and config elements. insert and deletion,
+	 * also lookup in the tree needs to hold the lock. */
+	lock_rw_type lock;
+	/** rbtree of doq_conn, the connections to different destination
+	 * addresses, and can be found by dcid. */
+	struct rbtree_type* conn_tree;
+	/** lock for the conid tree, needed for the conid tree and also
+	 * the conid elements */
+	lock_rw_type conid_lock;
+	/** rbtree of doq_conid, connections can be found by their
+	 * connection ids. Lookup by connection id, finds doq_conn. */
+	struct rbtree_type* conid_tree;
+	/** the server scid length */
+	int sv_scidlen;
+	/** the static secret for the server */
+	uint8_t* static_secret;
+	/** length of the static secret */
+	size_t static_secret_len;
+	/** the idle timeout in nanoseconds */
+	uint64_t idle_timeout;
+	/** the list of write interested connections, hold the doq_table.lock
+	 * to change them */
+	struct doq_conn* write_list_first, *write_list_last;
+	/** rbtree of doq_timer. */
+	struct rbtree_type* timer_tree;
+	/** lock on the current_size counter. */
+	lock_basic_type size_lock;
+	/** current use, in bytes, of QUIC buffers.
+	 * The doq_conn ngtcp2_conn structure, SSL structure and conid structs
+	 * are not counted. */
+	size_t current_size;
+};
+
+/**
+ * create SSL context for QUIC
+ * @param key: private key file.
+ * @param pem: public key cert.
+ * @param verifypem: if nonNULL, verifylocation file.
+ * return SSL_CTX* or NULL on failure (logged).
+ */
+void* quic_sslctx_create(char* key, char* pem, char* verifypem);
+
+/** create doq table */
+struct doq_table* doq_table_create(struct config_file* cfg,
+	struct ub_randstate* rnd);
+
+/** delete doq table */
+void doq_table_delete(struct doq_table* table);
+
+/**
+ * Timer information for doq timer.
+ */
+struct doq_timer {
+	/** The rbnode in the tree sorted by timeout value. Key this struct. */
+	struct rbnode_type node;
+	/** The timeout value. Absolute time value. */
+	struct timeval time;
+	/** If the timer is in the time tree, with the node. */
+	int timer_in_tree;
+	/** If there are more timers with the exact same timeout value,
+	 * they form a set of timers. The rbnode timer has a link to the list
+	 * with the other timers in the set. The rbnode timer is not a
+	 * member of the list with the other timers. The other timers are not
+	 * linked into the tree. */
+	struct doq_timer* setlist_first, *setlist_last;
+	/** If the timer is on the setlist. */
+	int timer_in_list;
+	/** If in the setlist, the next and prev element. */
+	struct doq_timer* setlist_next, *setlist_prev;
+	/** The connection that is timeouted. */
+	struct doq_conn* conn;
+	/** The worker that is waiting for the timeout event.
+	 * Set for the rbnode tree linked element. If a worker is waiting
+	 * for the event. If NULL, no worker is waiting for this timeout. */
+	struct doq_server_socket* worker_doq_socket;
+};
+
+/**
+ * Key information that makes a doq_conn node in the tree lookup.
+ */
+struct doq_conn_key {
+	/** the remote endpoint and local endpoint and ifindex */
+	struct doq_pkt_addr paddr;
+	/** the doq connection dcid */
+	uint8_t* dcid;
+	/** length of dcid */
+	size_t dcidlen;
+};
+
+/**
+ * DoQ connection, for DNS over QUIC. One connection to a remote endpoint
+ * with a number of streams in it. Every stream is like a tcp stream with
+ * a uint16_t length, query read, and a uint16_t length and answer written.
+ */
+struct doq_conn {
+	/** rbtree node, key is addresses and dcid */
+	struct rbnode_type node;
+	/** lock on the connection */
+	lock_basic_type lock;
+	/** the key information, with dcid and address endpoint */
+	struct doq_conn_key key;
+	/** the doq server socket for inside callbacks */
+	struct doq_server_socket* doq_socket;
+	/** the doq table this connection is part of */
+	struct doq_table* table;
+	/** if the connection is about to be deleted. */
+	uint8_t is_deleted;
+	/** the version, the client chosen version of QUIC */
+	uint32_t version;
+	/** the ngtcp2 connection, a server connection */
+	struct ngtcp2_conn* conn;
+	/** the connection ids that are associated with this doq_conn.
+	 * There can be a number, that can change. They are linked here,
+	 * so that upon removal, the list of actually associated conid
+	 * elements can be removed as well. */
+	struct doq_conid* conid_list;
+	/** the ngtcp2 last error for the connection */
+#ifdef HAVE_NGTCP2_CCERR_DEFAULT
+	struct ngtcp2_ccerr ccerr;
+#else
+	struct ngtcp2_connection_close_error last_error;
+#endif
+	/** the recent tls alert error code */
+	uint8_t tls_alert;
+	/** the ssl context, SSL* */
+	void* ssl;
+#ifdef HAVE_NGTCP2_CRYPTO_QUICTLS_CONFIGURE_SERVER_CONTEXT
+	/** the connection reference for ngtcp2_conn and userdata in ssl */
+	struct ngtcp2_crypto_conn_ref conn_ref;
+#endif
+	/** closure packet, if any */
+	uint8_t* close_pkt;
+	/** length of closure packet. */
+	size_t close_pkt_len;
+	/** closure ecn */
+	uint32_t close_ecn;
+	/** the streams for this connection, of type doq_stream */
+	struct rbtree_type stream_tree;
+	/** the streams that want write, they have something to write.
+	 * The list is ordered, the last have to wait for the first to
+	 * get their data written. */
+	struct doq_stream* stream_write_first, *stream_write_last;
+	/** the conn has write interest if true, no write interest if false. */
+	uint8_t write_interest;
+	/** if the conn is on the connection write list */
+	uint8_t on_write_list;
+	/** the connection write list prev and next, if on the write list */
+	struct doq_conn* write_prev, *write_next;
+	/** The timer for the connection. If unused, it is not in the tree
+	 * and not in the list. It is alloced here, so that it is prealloced.
+	 * It has to be set after every read and write on the connection, so
+	 * this improves performance, but also the allocation does not fail. */
+	struct doq_timer timer;
+};
+
+/**
+ * Connection ID and the doq_conn that is that connection. A connection
+ * has an original dcid, and then more connection ids associated.
+ */
+struct doq_conid {
+	/** rbtree node, key is the connection id. */
+	struct rbnode_type node;
+	/** the next and prev in the list of conids for the doq_conn */
+	struct doq_conid* next, *prev;
+	/** key to the doq_conn that is the connection */
+	struct doq_conn_key key;
+	/** the connection id, byte string */
+	uint8_t* cid;
+	/** the length of cid */
+	size_t cidlen;
+};
+
+/**
+ * DoQ stream, for DNS over QUIC.
+ */
+struct doq_stream {
+	/** the rbtree node for the stream, key is the stream_id */
+	rbnode_type node;
+	/** the stream id */
+	int64_t stream_id;
+	/** if the stream is closed */
+	uint8_t is_closed;
+	/** if the query is complete */
+	uint8_t is_query_complete;
+	/** the number of bytes read on the stream, up to querylen+2. */
+	size_t nread;
+	/** the length of the input query bytes */
+	size_t inlen;
+	/** the input bytes */
+	uint8_t* in;
+	/** does the stream have an answer to send */
+	uint8_t is_answer_available;
+	/** the answer bytes sent, up to outlen+2. */
+	size_t nwrite;
+	/** the length of the output answer bytes */
+	size_t outlen;
+	/** the output length in network wireformat */
+	uint16_t outlen_wire;
+	/** the output packet bytes */
+	uint8_t* out;
+	/** if the stream is on the write list */
+	uint8_t on_write_list;
+	/** the prev and next on the write list, if on the list */
+	struct doq_stream* write_prev, *write_next;
+};
+
+/** doq application error code that is sent when a stream is closed */
+#define DOQ_APP_ERROR_CODE 1
+
+/**
+ * Create the doq connection.
+ * @param c: the comm point for the listening doq socket.
+ * @param paddr: with remote and local address and ifindex for the
+ * 	connection destination. This is where packets are sent.
+ * @param dcid: the dcid, Destination Connection ID.
+ * @param dcidlen: length of dcid.
+ * @param version: client chosen version.
+ * @return new doq connection or NULL on allocation failure.
+ */
+struct doq_conn* doq_conn_create(struct comm_point* c,
+	struct doq_pkt_addr* paddr, const uint8_t* dcid, size_t dcidlen,
+	uint32_t version);
+
+/**
+ * Delete the doq connection structure.
+ * @param conn: to delete.
+ * @param table: with memory size.
+ */
+void doq_conn_delete(struct doq_conn* conn, struct doq_table* table);
+
+/** compare function of doq_conn */
+int doq_conn_cmp(const void* key1, const void* key2);
+
+/** compare function of doq_conid */
+int doq_conid_cmp(const void* key1, const void* key2);
+
+/** compare function of doq_timer */
+int doq_timer_cmp(const void* key1, const void* key2);
+
+/** compare function of doq_stream */
+int doq_stream_cmp(const void* key1, const void* key2);
+
+/** setup the doq connection callbacks, and settings. */
+int doq_conn_setup(struct doq_conn* conn, uint8_t* scid, size_t scidlen,
+	uint8_t* ocid, size_t ocidlen, const uint8_t* token, size_t tokenlen);
+
+/** fill a buffer with random data */
+void doq_fill_rand(struct ub_randstate* rnd, uint8_t* buf, size_t len);
+
+/** delete a doq_conid */
+void doq_conid_delete(struct doq_conid* conid);
+
+/** add a connection id to the doq_conn.
+ * caller must hold doq_table.conid_lock. */
+int doq_conn_associate_conid(struct doq_conn* conn, uint8_t* data,
+	size_t datalen);
+
+/** remove a connection id from the doq_conn.
+ * caller must hold doq_table.conid_lock. */
+void doq_conn_dissociate_conid(struct doq_conn* conn, const uint8_t* data,
+	size_t datalen);
+
+/** initial setup to link current connection ids to the doq_conn */
+int doq_conn_setup_conids(struct doq_conn* conn);
+
+/** remove the connection ids from the doq_conn.
+ * caller must hold doq_table.conid_lock. */
+void doq_conn_clear_conids(struct doq_conn* conn);
+
+/** find a conid in the doq_conn connection.
+ * caller must hold table.conid_lock. */
+struct doq_conid* doq_conid_find(struct doq_table* doq_table,
+	const uint8_t* data, size_t datalen);
+
+/** receive a packet for a connection */
+int doq_conn_recv(struct comm_point* c, struct doq_pkt_addr* paddr,
+	struct doq_conn* conn, struct ngtcp2_pkt_info* pi, int* err_retry,
+	int* err_drop);
+
+/** send packets for a connection */
+int doq_conn_write_streams(struct comm_point* c, struct doq_conn* conn,
+	int* err_drop);
+
+/** send the close packet for the connection, perhaps again. */
+int doq_conn_send_close(struct comm_point* c, struct doq_conn* conn);
+
+/** delete doq stream */
+void doq_stream_delete(struct doq_stream* stream);
+
+/** doq read a connection key from repinfo. It is not malloced, but points
+ * into the repinfo for the dcid. */
+void doq_conn_key_from_repinfo(struct doq_conn_key* key,
+	struct comm_reply* repinfo);
+
+/** doq find a stream in the connection */
+struct doq_stream* doq_stream_find(struct doq_conn* conn, int64_t stream_id);
+
+/** doq shutdown the stream. */
+int doq_stream_close(struct doq_conn* conn, struct doq_stream* stream,
+	int send_shutdown);
+
+/** send reply for a connection */
+int doq_stream_send_reply(struct doq_conn* conn, struct doq_stream* stream,
+	struct sldns_buffer* buf);
+
+/** the connection has write interest, wants to write packets */
+void doq_conn_write_enable(struct doq_conn* conn);
+
+/** the connection has no write interest, does not want to write packets */
+void doq_conn_write_disable(struct doq_conn* conn);
+
+/** set the connection on or off the write list, depending on write interest */
+void doq_conn_set_write_list(struct doq_table* table, struct doq_conn* conn);
+
+/** doq remove the connection from the write list */
+void doq_conn_write_list_remove(struct doq_table* table,
+	struct doq_conn* conn);
+
+/** doq get the first conn from the write list, if any, popped from list.
+ * Locks the conn that is returned. */
+struct doq_conn* doq_table_pop_first(struct doq_table* table);
+
+/**
+ * doq check if the timer for the conn needs to be changed.
+ * @param conn: connection, caller must hold lock on it.
+ * @param tv: time value, absolute time, returned.
+ * @return true if timer needs to be set to tv, false if no change is needed
+ * 	to the timer. The timer is already set to the right time in that case.
+ */
+int doq_conn_check_timer(struct doq_conn* conn, struct timeval* tv);
+
+/** doq remove timer from tree */
+void doq_timer_tree_remove(struct doq_table* table, struct doq_timer* timer);
+
+/** doq remove timer from list */
+void doq_timer_list_remove(struct doq_table* table, struct doq_timer* timer);
+
+/** doq unset the timer if it was set. */
+void doq_timer_unset(struct doq_table* table, struct doq_timer* timer);
+
+/** doq set the timer and add it. */
+void doq_timer_set(struct doq_table* table, struct doq_timer* timer,
+	struct doq_server_socket* worker_doq_socket, struct timeval* tv);
+
+/** doq find a timeout in the timer tree */
+struct doq_timer* doq_timer_find_time(struct doq_table* table,
+	struct timeval* tv);
+
+/** doq handle timeout for a connection. Pass conn locked. Returns false for
+ * deletion. */
+int doq_conn_handle_timeout(struct doq_conn* conn);
+
+/** doq add size to the current quic buffer counter */
+void doq_table_quic_size_add(struct doq_table* table, size_t add);
+
+/** doq subtract size from the current quic buffer counter */
+void doq_table_quic_size_subtract(struct doq_table* table, size_t subtract);
+
+/** doq check if mem is available for quic. */
+int doq_table_quic_size_available(struct doq_table* table,
+	struct config_file* cfg, size_t mem);
+
+/** doq get the quic size value */
+size_t doq_table_quic_size_get(struct doq_table* table);
+#endif /* HAVE_NGTCP2 */
+
 char* set_ip_dscp(int socket, int addrfamily, int ds);

 /** for debug and profiling purposes only
@@ -459,4 +853,14 @@ char* set_ip_dscp(int socket, int addrfamily, int ds);
 */
 void verbose_print_unbound_socket(struct unbound_socket* ub_sock);

+/** event callback for testcode/doqclient */
+void doq_client_event_cb(int fd, short event, void* arg);
+
+/** timer event callback for testcode/doqclient */
+void doq_client_timer_cb(int fd, short event, void* arg);
+
+#ifdef HAVE_NGTCP2
+/** get a timestamp in nanoseconds */
+ngtcp2_tstamp doq_get_timestamp_nanosec(void);
+#endif
 #endif /* LISTEN_DNSPORT_H */
@@ -223,7 +223,7 @@ lz_enter_zone_dname(struct local_zones* zones, uint8_t* nm, size_t len,
 	lock_rw_wrlock(&z->lock);
 	if(!rbtree_insert(&zones->ztree, &z->node)) {
 		struct local_zone* oldz;
-		char str[256];
+		char str[LDNS_MAX_DOMAINLEN];
 		dname_str(nm, str);
 		log_warn("duplicate local-zone %s", str);
 		lock_rw_unlock(&z->lock);
@@ -943,6 +943,16 @@ int local_zone_enter_defaults(struct local_zones* zones, struct config_file* cfg
 		log_err("out of memory adding default zone");
 		return 0;
 	}
+	/* resolver.arpa. zone (RFC 9462) */
+	if(!add_empty_default(zones, cfg, "resolver.arpa.")) {
+		log_err("out of memory adding default zone");
+		return 0;
+	}
+	/* service.arpa. zone (draft-ietf-dnssd-srp-25) */
+	if(!add_empty_default(zones, cfg, "service.arpa.")) {
+		log_err("out of memory adding default zone");
+		return 0;
+	}
 	/* onion. zone (RFC 7686) */
 	if(!add_empty_default(zones, cfg, "onion.")) {
 		log_err("out of memory adding default zone");
@@ -1765,7 +1775,7 @@ lz_inform_print(struct local_zone* z, struct query_info* qinfo,
 	struct sockaddr_storage* addr, socklen_t addrlen)
 {
 	char ip[128], txt[512];
-	char zname[LDNS_MAX_DOMAINLEN+1];
+	char zname[LDNS_MAX_DOMAINLEN];
 	uint16_t port = ntohs(((struct sockaddr_in*)addr)->sin_port);
 	dname_str(z->name, zname);
 	addr_to_str(addr, addrlen, ip, sizeof(ip));
@@ -1875,7 +1885,7 @@ local_zones_answer(struct local_zones* zones, struct module_env* env,
 			return 0;
 		}
 		if(z && verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(z->name, zname);
 			verbose(VERB_ALGO, "using localzone %s %s from view %s", 
 				zname, local_zone_type2str(lzt), view->name);
@@ -1897,7 +1907,7 @@ local_zones_answer(struct local_zones* zones, struct module_env* env,
 			z->override_tree, &tag, tagname, num_tags);
 		lock_rw_unlock(&zones->lock);
 		if(z && verbosity >= VERB_ALGO) {
-			char zname[255+1];
+			char zname[LDNS_MAX_DOMAINLEN];
 			dname_str(z->name, zname);
 			verbose(VERB_ALGO, "using localzone %s %s", zname,
 				local_zone_type2str(lzt));
@@ -2210,3 +2220,35 @@ void local_zones_del_data(struct local_zones* zones,

 	lock_rw_unlock(&z->lock);
 }
+
+/** Get memory usage for local_zone */
+static size_t
+local_zone_get_mem(struct local_zone* z)
+{
+	size_t m = sizeof(*z);
+	lock_rw_rdlock(&z->lock);
+	m += z->namelen + z->taglen + regional_get_mem(z->region);
+	lock_rw_unlock(&z->lock);
+	return m;
+}
+
+size_t local_zones_get_mem(struct local_zones* zones)
+{
+	struct local_zone* z;
+	size_t m;
+	if(!zones) return 0;
+	m = sizeof(*zones);
+	lock_rw_rdlock(&zones->lock);
+	RBTREE_FOR(z, struct local_zone*, &zones->ztree) {
+		m += local_zone_get_mem(z);
+	}
+	lock_rw_unlock(&zones->lock);
+	return m;
+}
+
+void local_zones_swap_tree(struct local_zones* zones, struct local_zones* data)
+{
+	rbtree_type oldtree = zones->ztree;
+	zones->ztree = data->ztree;
+	data->ztree = oldtree;
+}
@@ -642,6 +642,20 @@ local_zone_enter_rr(struct local_zone* z, uint8_t* nm, size_t nmlen,
 struct local_data* 
 local_zone_find_data(struct local_zone* z, uint8_t* nm, size_t nmlen, int nmlabs);

+/** Get memory usage for local_zones tree. The routine locks and unlocks
+ * the tree for reading. */
+size_t local_zones_get_mem(struct local_zones* zones);
+
+/**
+ * Swap internal tree with preallocated entries. Caller should manage
+ * the locks.
+ * @param zones: the local zones structure.
+ * @param data: the data structure used to take elements from. This contains
+ * 	the old elements on return.
+ */
+void local_zones_swap_tree(struct local_zones* zones,
+	struct local_zones* data);
+
 /** Enter a new zone; returns with WRlock
 *  Made public for unit testing
 *  @param zones: the local zones tree
@@ -77,6 +77,20 @@
 #include <netdb.h>
 #endif

+/** Compare two views by name */
+static int
+view_name_compare(const char* v_a, const char* v_b)
+{
+	if(v_a == NULL && v_b == NULL)
+		return 0;
+	/* The NULL name is smaller than if the name is set. */
+	if(v_a == NULL)
+		return -1;
+	if(v_b == NULL)
+		return 1;
+	return strcmp(v_a, v_b);
+}
+
 /**
 * Compare two response-ip client info entries for the purpose of mesh state
 * compare.  It returns 0 if ci_a and ci_b are considered equal; otherwise
@@ -132,12 +146,14 @@ client_info_compare(const struct respip_client_info* ci_a,
 	}
 	if(ci_a->tag_datas != ci_b->tag_datas)
 		return ci_a->tag_datas < ci_b->tag_datas ? -1 : 1;
-	if(ci_a->view != ci_b->view)
-		return ci_a->view < ci_b->view ? -1 : 1;
-	/* For the unbound daemon these should be non-NULL and identical,
-	 * but we check that just in case. */
-	if(ci_a->respip_set != ci_b->respip_set)
-		return ci_a->respip_set < ci_b->respip_set ? -1 : 1;
+	if(ci_a->view || ci_a->view_name || ci_b->view || ci_b->view_name) {
+		/* Compare the views by name. */
+		cmp = view_name_compare(
+			(ci_a->view?ci_a->view->name:ci_a->view_name),
+			(ci_b->view?ci_b->view->name:ci_b->view_name));
+		if(cmp != 0)
+			return cmp;
+	}
 	return 0;
 }

@@ -214,6 +230,9 @@ mesh_create(struct module_stack* stack, struct module_env* env)
 	mesh->stats_dropped = 0;
 	mesh->ans_expired = 0;
 	mesh->ans_cachedb = 0;
+	mesh->num_queries_discard_timeout = 0;
+	mesh->num_queries_wait_limit = 0;
+	mesh->num_dns_error_reports = 0;
 	mesh->max_reply_states = env->cfg->num_queries_per_thread;
 	mesh->max_forever_states = (mesh->max_reply_states+1)/2;
 #ifndef S_SPLINT_S
@@ -311,7 +330,7 @@ int mesh_make_new_space(struct mesh_area* mesh, sldns_buffer* qbuf)

 struct dns_msg*
 mesh_serve_expired_lookup(struct module_qstate* qstate,
-	struct query_info* lookup_qinfo)
+	struct query_info* lookup_qinfo, int* is_expired)
 {
 	hashvalue_type h;
 	struct lruhash_entry* e;
@@ -321,6 +340,7 @@ mesh_serve_expired_lookup(struct module_qstate* qstate,
 	time_t timenow = *qstate->env->now;
 	int must_validate = (!(qstate->query_flags&BIT_CD)
 		|| qstate->env->cfg->ignore_cd) && qstate->env->need_to_validate;
+	*is_expired = 0;
 	/* Lookup cache */
 	h = query_info_hash(lookup_qinfo, qstate->query_flags);
 	e = slabhash_lookup(qstate->env->msg_cache, h, lookup_qinfo, 0);
@@ -328,6 +348,7 @@ mesh_serve_expired_lookup(struct module_qstate* qstate,

 	key = (struct msgreply_entry*)e->key;
 	data = (struct reply_info*)e->data;
+	if(data->ttl < timenow) *is_expired = 1;
 	msg = tomsg(qstate->env, &key->key, data, qstate->region, timenow,
 		qstate->env->cfg->serve_expired, qstate->env->scratch);
 	if(!msg)
@@ -422,7 +443,7 @@ void mesh_new_client(struct mesh_area* mesh, struct query_info* qinfo,
 		verbose(VERB_ALGO, "Too many queries waiting from the IP. "
 			"dropping incoming query.");
 		comm_point_drop_reply(rep);
-		mesh->stats_dropped++;
+		mesh->num_queries_wait_limit++;
 		return;
 	}
 	if(!unique)
@@ -866,6 +887,78 @@ void mesh_report_reply(struct mesh_area* mesh, struct outbound_entry* e,
 	mesh_run(mesh, e->qstate->mesh_info, event, e);
 }

+/** copy strlist to region */
+static struct config_strlist*
+cfg_region_strlist_copy(struct regional* region, struct config_strlist* list)
+{
+	struct config_strlist* result = NULL, *last = NULL, *s = list;
+	while(s) {
+		struct config_strlist* n = regional_alloc_zero(region,
+			sizeof(*n));
+		if(!n)
+			return NULL;
+		n->str = regional_strdup(region, s->str);
+		if(!n->str)
+			return NULL;
+		if(last)
+			last->next = n;
+		else	result = n;
+		last = n;
+		s = s->next;
+	}
+	return result;
+}
+
+/** Copy the client info to the query region. */
+static struct respip_client_info*
+mesh_copy_client_info(struct regional* region, struct respip_client_info* cinfo)
+{
+	size_t i;
+	struct respip_client_info* client_info;
+	client_info = regional_alloc_init(region, cinfo, sizeof(*cinfo));
+	if(!client_info)
+		return NULL;
+	/* Copy the client_info so that if the configuration changes,
+	 * then the data stays valid. */
+	if(cinfo->taglist) {
+		client_info->taglist = regional_alloc_init(region, cinfo->taglist,
+			cinfo->taglen);
+		if(!client_info->taglist)
+			return NULL;
+	}
+	if(cinfo->tag_actions) {
+		client_info->tag_actions = regional_alloc_init(region, cinfo->tag_actions,
+			cinfo->tag_actions_size);
+		if(!client_info->tag_actions)
+			return NULL;
+	}
+	if(cinfo->tag_datas) {
+		client_info->tag_datas = regional_alloc_zero(region,
+			sizeof(struct config_strlist*)*cinfo->tag_datas_size);
+		if(!client_info->tag_datas)
+			return NULL;
+		for(i=0; i<cinfo->tag_datas_size; i++) {
+			if(cinfo->tag_datas[i]) {
+				client_info->tag_datas[i] = cfg_region_strlist_copy(
+					region, cinfo->tag_datas[i]);
+				if(!client_info->tag_datas[i])
+					return NULL;
+			}
+		}
+	}
+	if(cinfo->view) {
+		/* Do not copy the view pointer but store a name instead.
+		 * The name is looked up later when done, this means that
+		 * the view tree can be changed, by reloads. */
+		client_info->view = NULL;
+		client_info->view_name = regional_strdup(region,
+			cinfo->view->name);
+		if(!client_info->view_name)
+			return NULL;
+	}
+	return client_info;
+}
+
 struct mesh_state*
 mesh_state_create(struct module_env* env, struct query_info* qinfo,
 	struct respip_client_info* cinfo, uint16_t qflags, int prime,
@@ -906,8 +999,7 @@ mesh_state_create(struct module_env* env, struct query_info* qinfo,
 		return NULL;
 	}
 	if(cinfo) {
-		mstate->s.client_info = regional_alloc_init(region, cinfo,
-			sizeof(*cinfo));
+		mstate->s.client_info = mesh_copy_client_info(region, cinfo);
 		if(!mstate->s.client_info) {
 			alloc_reg_release(env->alloc, region);
 			return NULL;
@@ -1487,10 +1579,121 @@ mesh_send_reply(struct mesh_state* m, int rcode, struct reply_info* rep,
 			&r->query_reply.client_addr,
 			r->query_reply.client_addrlen, duration, 0, r_buffer,
 			(m->s.env->cfg->log_destaddr?(void*)r->query_reply.c->socket->addr:NULL),
-			r->query_reply.c->type);
+			r->query_reply.c->type, r->query_reply.c->ssl);
 	}
 }

+/**
+ * Generate the DNS Error Report (RFC9567).
+ * If there is an EDE attached for this reply and there was a Report-Channel
+ * EDNS0 option from the upstream, fire up a report query.
+ * @param qstate: module qstate.
+ * @param rep: prepared reply to be sent.
+ */
+static void dns_error_reporting(struct module_qstate* qstate,
+	struct reply_info* rep)
+{
+	struct query_info qinfo;
+	struct mesh_state* sub;
+	struct module_qstate* newq;
+	uint8_t buf[LDNS_MAX_DOMAINLEN];
+	size_t count = 0;
+	int written;
+	size_t expected_length;
+	struct edns_option* opt;
+	sldns_ede_code reason_bogus = LDNS_EDE_NONE;
+	sldns_rr_type qtype = qstate->qinfo.qtype;
+	uint8_t* qname = qstate->qinfo.qname;
+	size_t qname_len = qstate->qinfo.qname_len-1; /* skip the trailing \0 */
+	uint8_t* agent_domain;
+	size_t agent_domain_len;
+
+	/* We need a valid reporting agent;
+	 * this is based on qstate->edns_opts_back_in that will probably have
+	 * the latest reporting agent we found while iterating */
+	opt = edns_opt_list_find(qstate->edns_opts_back_in,
+		LDNS_EDNS_REPORT_CHANNEL);
+	if(!opt) return;
+	agent_domain_len = opt->opt_len;
+	agent_domain = opt->opt_data;
+	if(dname_valid(agent_domain, agent_domain_len) < 3) {
+		/* The agent domain needs to be a valid dname that is not the
+		 * root; from RFC9567. */
+		return;
+	}
+
+	/* Get the EDE generated from the mesh state, these are mostly
+	 * validator errors. If other errors are produced in the future (e.g.,
+	 * RPZ) we would not want them to result in error reports. */
+	reason_bogus = errinf_to_reason_bogus(qstate);
+	if(rep && ((reason_bogus == LDNS_EDE_DNSSEC_BOGUS &&
+		rep->reason_bogus != LDNS_EDE_NONE) ||
+		reason_bogus == LDNS_EDE_NONE)) {
+		reason_bogus = rep->reason_bogus;
+	}
+	if(reason_bogus == LDNS_EDE_NONE ||
+		/* other, does not make sense without the text that comes
+		 * with it */
+		reason_bogus == LDNS_EDE_OTHER) return;
+
+	/* Synthesize the error report query in the format:
+	 * "_er.$qtype.$qname.$ede._er.$reporting-agent-domain" */
+	/* First check if the static length parts fit in the buffer.
+	 * That is everything except for qtype and ede that need to be
+	 * converted to decimal and checked further on. */
+	expected_length = 4/*_er*/+qname_len+4/*_er*/+agent_domain_len;
+	if(expected_length > LDNS_MAX_DOMAINLEN) goto skip;
+
+	memmove(buf+count, "\3_er", 4);
+	count += 4;
+
+	written = snprintf((char*)buf+count, LDNS_MAX_DOMAINLEN-count,
+		"X%d", qtype);
+	expected_length += written;
+	/* Skip on error, truncation or long expected length */
+	if(written < 0 || (size_t)written >= LDNS_MAX_DOMAINLEN-count ||
+		expected_length > LDNS_MAX_DOMAINLEN ) goto skip;
+	/* Put in the label length */
+	*(buf+count) = (char)(written - 1);
+	count += written;
+
+	memmove(buf+count, qname, qname_len);
+	count += qname_len;
+
+	written = snprintf((char*)buf+count, LDNS_MAX_DOMAINLEN-count,
+		"X%d", reason_bogus);
+	expected_length += written;
+	/* Skip on error, truncation or long expected length */
+	if(written < 0 || (size_t)written >= LDNS_MAX_DOMAINLEN-count ||
+		expected_length > LDNS_MAX_DOMAINLEN ) goto skip;
+	*(buf+count) = (char)(written - 1);
+	count += written;
+
+	memmove(buf+count, "\3_er", 4);
+	count += 4;
+
+	/* Copy the agent domain */
+	memmove(buf+count, agent_domain, agent_domain_len);
+	count += agent_domain_len;
+
+	qinfo.qname = buf;
+	qinfo.qname_len = count;
+	qinfo.qtype = LDNS_RR_TYPE_TXT;
+	qinfo.qclass = qstate->qinfo.qclass;
+	qinfo.local_alias = NULL;
+
+	log_query_info(VERB_ALGO, "DNS Error Reporting: generating report "
+		"query for", &qinfo);
+	if(mesh_add_sub(qstate, &qinfo, BIT_RD, 0, 0, &newq, &sub)) {
+		qstate->env->mesh->num_dns_error_reports++;
+	}
+	return;
+skip:
+	verbose(VERB_ALGO, "DNS Error Reporting: report query qname too long; "
+		"skip");
+	return;
+}
+
 void mesh_query_done(struct mesh_state* mstate)
 {
 	struct mesh_reply* r;
@@ -1508,8 +1711,10 @@ void mesh_query_done(struct mesh_state* mstate)
 	}
 	if(mstate->s.return_rcode == LDNS_RCODE_SERVFAIL ||
 		(rep && FLAGS_GET_RCODE(rep->flags) == LDNS_RCODE_SERVFAIL)) {
-		/* we are SERVFAILing; check for expired answer here */
-		mesh_serve_expired_callback(mstate);
+		if(mstate->s.env->cfg->serve_expired) {
+			/* we are SERVFAILing; check for expired answer here */
+			mesh_respond_serve_expired(mstate);
+		}
 		if((mstate->reply_list || mstate->cb_list)
 		&& mstate->s.env->cfg->log_servfail
 		&& !mstate->s.env->cfg->val_log_squelch) {
@@ -1517,6 +1722,10 @@ void mesh_query_done(struct mesh_state* mstate)
 			if(err) { log_err("%s", err); }
 		}
 	}
+
+	if(mstate->reply_list && mstate->s.env->cfg->dns_error_reporting)
+		dns_error_reporting(&mstate->s, rep);
+
 	for(r = mstate->reply_list; r; r = r->next) {
 		struct timeval old;
 		timeval_subtract(&old, mstate->s.env->now_tv, &r->start_time);
@@ -1538,7 +1747,7 @@ void mesh_query_done(struct mesh_state* mstate)
 				http2_stream_remove_mesh_state(r->h2_stream);
 			comm_point_drop_reply(&r->query_reply);
 			mstate->reply_list = reply_list;
-			mstate->s.env->mesh->stats_dropped++;
+			mstate->s.env->mesh->num_queries_discard_timeout++;
 			continue;
 		}

@@ -1680,6 +1889,25 @@ struct mesh_state* mesh_area_find(struct mesh_area* mesh,
 	return result;
 }

+/** remove mesh state callback */
+int mesh_state_del_cb(struct mesh_state* s, mesh_cb_func_type cb, void* cb_arg)
+{
+	struct mesh_cb* r, *prev = NULL;
+	r = s->cb_list;
+	while(r) {
+		if(r->cb == cb && r->cb_arg == cb_arg) {
+			/* Delete this entry. */
+			/* It was allocated in the s.region, so no free. */
+			if(prev) prev->next = r->next;
+			else s->cb_list = r->next;
+			return 1;
+		}
+		prev = r;
+		r = r->next;
+	}
+	return 0;
+}
+
 int mesh_state_add_cb(struct mesh_state* s, struct edns_data* edns,
        sldns_buffer* buf, mesh_cb_func_type cb, void* cb_arg,
 	uint16_t qid, uint16_t qflags)
@@ -2027,6 +2255,8 @@ mesh_stats_clear(struct mesh_area* mesh)
 {
 	if(!mesh)
 		return;
+	mesh->num_query_authzone_up = 0;
+	mesh->num_query_authzone_down = 0;
 	mesh->replies_sent = 0;
 	mesh->replies_sum_wait.tv_sec = 0;
 	mesh->replies_sum_wait.tv_usec = 0;
@@ -2040,6 +2270,9 @@ mesh_stats_clear(struct mesh_area* mesh)
 	memset(&mesh->ans_rcode[0], 0, sizeof(size_t)*UB_STATS_RCODE_NUM);
 	memset(&mesh->rpz_action[0], 0, sizeof(size_t)*UB_STATS_RPZ_ACTION_NUM);
 	mesh->ans_nodata = 0;
+	mesh->num_queries_discard_timeout = 0;
+	mesh->num_queries_wait_limit = 0;
+	mesh->num_dns_error_reports = 0;
 }

 size_t
@@ -2141,7 +2374,8 @@ apply_respip_action(struct module_qstate* qstate,
 		return 1;

 	if(!respip_rewrite_reply(qinfo, cinfo, rep, encode_repp, actinfo,
-		alias_rrset, 0, qstate->region, az, NULL))
+		alias_rrset, 0, qstate->region, az, NULL, qstate->env->views,
+		qstate->env->respip_set))
 		return 0;

 	/* xxx_deny actions mean dropping the reply, unless the original reply
@@ -2175,7 +2409,8 @@ mesh_serve_expired_callback(void* arg)
 	struct timeval tv = {0, 0};
 	int must_validate = (!(qstate->query_flags&BIT_CD)
 		|| qstate->env->cfg->ignore_cd) && qstate->env->need_to_validate;
-	int i = 0;
+	int i = 0, for_count;
+	int is_expired;
 	if(!qstate->serve_expired_data) return;
 	verbose(VERB_ALGO, "Serve expired: Trying to reply with expired data");
 	comm_timer_delete(qstate->serve_expired_data->timer);
@@ -2187,15 +2422,21 @@ mesh_serve_expired_callback(void* arg)
 			"Serve expired: Not allowed to look into cache for stale");
 		return;
 	}
-	/* The following while is used instead of the `goto lookup_cache`
-	 * like in the worker. */
-	while(1) {
+	/* The following for is used instead of the `goto lookup_cache`
+	 * like in the worker. This loop should get max 2 passes if we need to
+	 * do any aliasing. */
+	for(for_count = 0; for_count < 2; for_count++) {
 		fptr_ok(fptr_whitelist_serve_expired_lookup(
 			qstate->serve_expired_data->get_cached_answer));
 		msg = (*qstate->serve_expired_data->get_cached_answer)(qstate,
-			lookup_qinfo);
-		if(!msg)
+			lookup_qinfo, &is_expired);
+		if(!msg || (FLAGS_GET_RCODE(msg->rep->flags) != LDNS_RCODE_NOERROR
+			&& FLAGS_GET_RCODE(msg->rep->flags) != LDNS_RCODE_NXDOMAIN
+			&& FLAGS_GET_RCODE(msg->rep->flags) != LDNS_RCODE_YXDOMAIN)) {
+			/* We don't care for cached failure answers at this
+			 * stage. */
 			return;
+		}
 		/* Reset these in case we pass a second time from here. */
 		encode_rep = msg->rep;
 		memset(&actinfo, 0, sizeof(actinfo));
@@ -2209,7 +2450,8 @@ mesh_serve_expired_callback(void* arg)
 		} else if(partial_rep &&
 			!respip_merge_cname(partial_rep, &qstate->qinfo, msg->rep,
 			qstate->client_info, must_validate, &encode_rep, qstate->region,
-			qstate->env->auth_zones)) {
+			qstate->env->auth_zones, qstate->env->views,
+			qstate->env->respip_set)) {
 			return;
 		}
 		if(!encode_rep || alias_rrset) {
@@ -2267,7 +2509,7 @@ mesh_serve_expired_callback(void* arg)
 				http2_stream_remove_mesh_state(r->h2_stream);
 			comm_point_drop_reply(&r->query_reply);
 			mstate->reply_list = reply_list;
-			mstate->s.env->mesh->stats_dropped++;
+			mstate->s.env->mesh->num_queries_discard_timeout++;
 			continue;
 		}

@@ -2285,8 +2527,10 @@ mesh_serve_expired_callback(void* arg)

 		/* Add EDE Stale Answer (RCF8914). Ignore global ede as this is
 		 * warning instead of an error */
-		if (r->edns.edns_present && qstate->env->cfg->ede_serve_expired &&
-			qstate->env->cfg->ede) {
+		if(r->edns.edns_present &&
+			qstate->env->cfg->ede_serve_expired &&
+			qstate->env->cfg->ede &&
+			is_expired) {
 			edns_opt_list_append_ede(&r->edns.opt_list_out,
 				mstate->s.region, LDNS_EDE_STALE_ANSWER, NULL);
 		}
@@ -2361,3 +2605,25 @@ int mesh_jostle_exceeded(struct mesh_area* mesh)
 		return 0;
 	return 1;
 }
+
+void mesh_remove_callback(struct mesh_area* mesh, struct query_info* qinfo,
+	uint16_t qflags, mesh_cb_func_type cb, void* cb_arg)
+{
+	struct mesh_state* s = NULL;
+	s = mesh_area_find(mesh, NULL, qinfo, qflags&(BIT_RD|BIT_CD), 0, 0);
+	if(!s) return;
+	if(!mesh_state_del_cb(s, cb, cb_arg)) return;
+
+	/* It was in the list and removed. */
+	log_assert(mesh->num_reply_addrs > 0);
+	mesh->num_reply_addrs--;
+	if(!s->reply_list && !s->cb_list) {
+		/* was a reply state, not anymore */
+		log_assert(mesh->num_reply_states > 0);
+		mesh->num_reply_states--;
+	}
+	if(!s->reply_list && !s->cb_list &&
+		s->super_set.count == 0) {
+		mesh->num_detached_states++;
+	}
+}
@@ -90,6 +90,11 @@ struct mesh_area {
 	/** rbtree of all current queries (mesh_state.node)*/
 	rbtree_type all;

+	/** number of queries for unbound's auth_zones, upstream query */
+	size_t num_query_authzone_up;
+	/** number of queries for unbound's auth_zones, downstream answers */
+	size_t num_query_authzone_down;
+
 	/** count of the total number of mesh_reply entries */
 	size_t num_reply_addrs;
 	/** count of the number of mesh_states that have mesh_replies 
@@ -132,6 +137,12 @@ struct mesh_area {
 	size_t ans_nodata;
 	/** (extended stats) type of applied RPZ action */
 	size_t rpz_action[UB_STATS_RPZ_ACTION_NUM];
+	/** stats, number of queries removed due to discard-timeout */
+	size_t num_queries_discard_timeout;
+	/** stats, number of queries removed due to wait-limit */
+	size_t num_queries_wait_limit;
+	/** stats, number of dns error reports generated */
+	size_t num_dns_error_reports;

 	/** backup of query if other operations recurse and need the
 	 * network buffers */
@@ -673,11 +684,12 @@ void mesh_serve_expired_callback(void* arg);
 * the same behavior as when replying from cache.
 * @param qstate: the module qstate.
 * @param lookup_qinfo: the query info to look for in the cache.
+ * @param is_expired: set if the cached answer is expired.
 * @return dns_msg if a cached answer was found, otherwise NULL.
 */
 struct dns_msg*
 mesh_serve_expired_lookup(struct module_qstate* qstate,
-	struct query_info* lookup_qinfo);
+	struct query_info* lookup_qinfo, int* is_expired);

 /**
 * See if the mesh has space for more queries. You can allocate queries
@@ -696,4 +708,17 @@ int mesh_jostle_exceeded(struct mesh_area* mesh);
 */
 void mesh_respond_serve_expired(struct mesh_state* mstate);

+/**
+ * Remove callback from mesh. Removes the callback from the state.
+ * The state itself is left to run. Searches for the pointer values.
+ *
+ * @param mesh: the mesh.
+ * @param qinfo: query from client.
+ * @param qflags: flags from client query.
+ * @param cb: callback function.
+ * @param cb_arg: callback user arg.
+ */
+void mesh_remove_callback(struct mesh_area* mesh, struct query_info* qinfo,
+	uint16_t qflags, mesh_cb_func_type cb, void* cb_arg);
+
 #endif /* SERVICES_MESH_H */
@@ -265,7 +265,7 @@ modstack_call_init(struct module_stack* stack, const char* module_conf,
        int i, changed = 0;
        env->need_to_validate = 0; /* set by module init below */
        for(i=0; i<stack->num; i++) {
-		while(*module_conf && isspace(*module_conf))
+		while(*module_conf && isspace((unsigned char)*module_conf))
 			module_conf++;
                if(strncmp(stack->mod[i]->name, module_conf,
 			strlen(stack->mod[i]->name))) {
@@ -262,12 +262,14 @@ pick_outgoing_tcp(struct pending_tcp* pend, struct waiting_tcp* w, int s)
 /** get TCP file descriptor for address, returns -1 on failure,
 * tcp_mss is 0 or maxseg size to set for TCP packets. */
 int
-outnet_get_tcp_fd(struct sockaddr_storage* addr, socklen_t addrlen, int tcp_mss, int dscp)
+outnet_get_tcp_fd(struct sockaddr_storage* addr, socklen_t addrlen,
+	int tcp_mss, int dscp, int nodelay)
 {
 	int s;
 	int af;
 	char* err;
-#if defined(SO_REUSEADDR) || defined(IP_BIND_ADDRESS_NO_PORT)
+#if defined(SO_REUSEADDR) || defined(IP_BIND_ADDRESS_NO_PORT)	\
+	|| defined(TCP_NODELAY)
 	int on = 1;
 #endif
 #ifdef INET6
@@ -320,6 +322,18 @@ outnet_get_tcp_fd(struct sockaddr_storage* addr, socklen_t addrlen, int tcp_mss,
 			" setsockopt(.. IP_BIND_ADDRESS_NO_PORT ..) failed");
 	}
 #endif /* IP_BIND_ADDRESS_NO_PORT */
+	if(nodelay) {
+#if defined(IPPROTO_TCP) && defined(TCP_NODELAY)
+		if(setsockopt(s, IPPROTO_TCP, TCP_NODELAY, (void*)&on,
+			(socklen_t)sizeof(on)) < 0) {
+			verbose(VERB_ALGO, "outgoing tcp:"
+				" setsockopt(.. TCP_NODELAY ..) failed");
+		}
+#else
+		verbose(VERB_ALGO, "outgoing tcp:"
+			" setsockopt(.. TCP_NODELAY ..) unsupported");
+#endif /* defined(IPPROTO_TCP) && defined(TCP_NODELAY) */
+	}
 	return s;
 }

@@ -649,7 +663,8 @@ outnet_tcp_take_into_use(struct waiting_tcp* w)
 	}

 	/* open socket */
-	s = outnet_get_tcp_fd(&w->addr, w->addrlen, w->outnet->tcp_mss, w->outnet->ip_dscp);
+	s = outnet_get_tcp_fd(&w->addr, w->addrlen, w->outnet->tcp_mss,
+		w->outnet->ip_dscp, w->ssl_upstream);

 	if(s == -1)
 		return 0;
@@ -1054,7 +1069,7 @@ reuse_move_writewait_away(struct outside_network* outnet,
 		if(verbosity >= VERB_CLIENT && pend->query->pkt_len > 12+2+2 &&
 			LDNS_QDCOUNT(pend->query->pkt) > 0 &&
 			dname_valid(pend->query->pkt+12, pend->query->pkt_len-12)) {
-			char buf[LDNS_MAX_DOMAINLEN+1];
+			char buf[LDNS_MAX_DOMAINLEN];
 			dname_str(pend->query->pkt+12, buf);
 			verbose(VERB_CLIENT, "reuse_move_writewait_away current %s %d bytes were written",
 				buf, (int)pend->c->tcp_write_byte_count);
@@ -1079,7 +1094,7 @@ reuse_move_writewait_away(struct outside_network* outnet,
 		if(verbosity >= VERB_CLIENT && w->pkt_len > 12+2+2 &&
 			LDNS_QDCOUNT(w->pkt) > 0 &&
 			dname_valid(w->pkt+12, w->pkt_len-12)) {
-			char buf[LDNS_MAX_DOMAINLEN+1];
+			char buf[LDNS_MAX_DOMAINLEN];
 			dname_str(w->pkt+12, buf);
 			verbose(VERB_CLIENT, "reuse_move_writewait_away item %s", buf);
 		}
@@ -2825,7 +2840,7 @@ serviced_perturb_qname(struct ub_randstate* rnd, uint8_t* qbuf, size_t len)
 		lablen = *d++;
 	}
 	if(verbosity >= VERB_ALGO) {
-		char buf[LDNS_MAX_DOMAINLEN+1];
+		char buf[LDNS_MAX_DOMAINLEN];
 		dname_str(qbuf+10, buf);
 		verbose(VERB_ALGO, "qname perturbed to %s", buf);
 	}
@@ -3466,7 +3481,10 @@ outnet_serviced_query(struct outside_network* outnet,
 			timenow = *env->now;
 			if(!infra_ratelimit_inc(env->infra_cache, zone,
 				zonelen, timenow, env->cfg->ratelimit_backoff,
-				&qstate->qinfo, qstate->reply)) {
+				&qstate->qinfo,
+				qstate->mesh_info->reply_list
+					?&qstate->mesh_info->reply_list->query_reply
+					:NULL)) {
 				/* Can we pass through with slip factor? */
 				if(env->cfg->ratelimit_factor == 0 ||
 					ub_random_max(env->rnd,
@@ -3715,7 +3733,8 @@ outnet_comm_point_for_tcp(struct outside_network* outnet,
 	sldns_buffer* query, int timeout, int ssl, char* host)
 {
 	struct comm_point* cp;
-	int fd = outnet_get_tcp_fd(to_addr, to_addrlen, outnet->tcp_mss, outnet->ip_dscp);
+	int fd = outnet_get_tcp_fd(to_addr, to_addrlen, outnet->tcp_mss,
+		outnet->ip_dscp, ssl);
 	if(fd == -1) {
 		return 0;
 	}
@@ -3790,7 +3809,8 @@ outnet_comm_point_for_http(struct outside_network* outnet,
 {
 	/* cp calls cb with err=NETEVENT_DONE when transfer is done */
 	struct comm_point* cp;
-	int fd = outnet_get_tcp_fd(to_addr, to_addrlen, outnet->tcp_mss, outnet->ip_dscp);
+	int fd = outnet_get_tcp_fd(to_addr, to_addrlen, outnet->tcp_mss,
+		outnet->ip_dscp, ssl);
 	if(fd == -1) {
 		return 0;
 	}
@@ -743,9 +743,11 @@ void reuse_write_wait_remove(struct reuse_tcp* reuse, struct waiting_tcp* w);
 void reuse_write_wait_push_back(struct reuse_tcp* reuse, struct waiting_tcp* w);

 /** get TCP file descriptor for address, returns -1 on failure,
- * tcp_mss is 0 or maxseg size to set for TCP packets. */
+ * tcp_mss is 0 or maxseg size to set for TCP packets,
+ * nodelay (TCP_NODELAY) should be set for TLS connections to speed up the TLS
+ * handshake.*/
 int outnet_get_tcp_fd(struct sockaddr_storage* addr, socklen_t addrlen,
-	int tcp_mss, int dscp);
+	int tcp_mss, int dscp, int nodelay);

 /**
 * Create udp commpoint suitable for sending packets to the destination.
@@ -242,10 +242,14 @@ rpz_action_to_localzone_type(enum rpz_action a)
 	case RPZ_NODATA_ACTION: return local_zone_always_nodata;
 	case RPZ_DROP_ACTION: return local_zone_always_deny;
 	case RPZ_PASSTHRU_ACTION: return local_zone_always_transparent;
-	case RPZ_LOCAL_DATA_ACTION:	/* fallthrough */
+	case RPZ_LOCAL_DATA_ACTION:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	case RPZ_CNAME_OVERRIDE_ACTION: return local_zone_redirect;
 	case RPZ_TCP_ONLY_ACTION: return local_zone_truncate;
-	case RPZ_INVALID_ACTION: /* fallthrough */
+	case RPZ_INVALID_ACTION:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	default: return local_zone_invalid;
 	}
 }
@@ -258,10 +262,14 @@ rpz_action_to_respip_action(enum rpz_action a)
 	case RPZ_NODATA_ACTION: return respip_always_nodata;
 	case RPZ_DROP_ACTION: return respip_always_deny;
 	case RPZ_PASSTHRU_ACTION: return respip_always_transparent;
-	case RPZ_LOCAL_DATA_ACTION: /* fallthrough */
+	case RPZ_LOCAL_DATA_ACTION:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	case RPZ_CNAME_OVERRIDE_ACTION: return respip_redirect;
 	case RPZ_TCP_ONLY_ACTION: return respip_truncate;
-	case RPZ_INVALID_ACTION: /* fallthrough */
+	case RPZ_INVALID_ACTION:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	default: return respip_invalid;
 	}
 }
@@ -276,7 +284,9 @@ localzone_type_to_rpz_action(enum localzone_type lzt)
 	case local_zone_always_transparent: return RPZ_PASSTHRU_ACTION;
 	case local_zone_redirect: return RPZ_LOCAL_DATA_ACTION;
 	case local_zone_truncate: return RPZ_TCP_ONLY_ACTION;
-	case local_zone_invalid: /* fallthrough */
+	case local_zone_invalid:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	default: return RPZ_INVALID_ACTION;
 	}
 }
@@ -291,7 +301,9 @@ respip_action_to_rpz_action(enum respip_action a)
 	case respip_always_transparent: return RPZ_PASSTHRU_ACTION;
 	case respip_redirect: return RPZ_LOCAL_DATA_ACTION;
 	case respip_truncate: return RPZ_TCP_ONLY_ACTION;
-	case respip_invalid: /* fallthrough */
+	case respip_invalid:
+		ATTR_FALLTHROUGH
+		/* fallthrough */
 	default: return RPZ_INVALID_ACTION;
 	}
 }
@@ -654,7 +666,7 @@ rpz_insert_local_zones_trigger(struct local_zones* lz, uint8_t* dname,
 	int newzone = 0;

 	if(a == RPZ_INVALID_ACTION) {
-		char str[255+1];
+		char str[LDNS_MAX_DOMAINLEN];
 		if(rrtype == LDNS_RR_TYPE_SOA || rrtype == LDNS_RR_TYPE_NS ||
 			rrtype == LDNS_RR_TYPE_DNAME ||
 			rrtype == LDNS_RR_TYPE_DNSKEY ||
@@ -727,7 +739,7 @@ rpz_insert_local_zones_trigger(struct local_zones* lz, uint8_t* dname,
 static void
 rpz_log_dname(char const* msg, uint8_t* dname, size_t dname_len)
 {
-	char buf[LDNS_MAX_DOMAINLEN+1];
+	char buf[LDNS_MAX_DOMAINLEN];
 	(void)dname_len;
 	dname_str(dname, buf);
 	verbose(VERB_ALGO, "rpz: %s: <%s>", msg, buf);
@@ -1050,7 +1062,7 @@ rpz_insert_response_ip_trigger(struct rpz* r, uint8_t* dname, size_t dnamelen,

 	if(a == RPZ_INVALID_ACTION ||
 		rpz_action_to_respip_action(a) == respip_invalid) {
-		char str[255+1];
+		char str[LDNS_MAX_DOMAINLEN];
 		dname_str(dname, str);
 		verbose(VERB_ALGO, "rpz: respip trigger, %s skipping unsupported action: %s",
 			str, rpz_action_to_string(a));
@@ -1621,7 +1633,7 @@ log_rpz_apply(char* trigger, uint8_t* dname, struct addr_tree_node* addrnode,
 	struct comm_reply* repinfo, struct module_qstate* ms, char* log_name)
 {
 	char ip[128], txt[512], portstr[32];
-	char dnamestr[LDNS_MAX_DOMAINLEN+1];
+	char dnamestr[LDNS_MAX_DOMAINLEN];
 	uint16_t port = 0;
 	if(dname) {
 		dname_str(dname, dnamestr);
@@ -1957,6 +1969,7 @@ rpz_synthesize_nodata(struct rpz* ATTR_UNUSED(r), struct module_qstate* ms,
 					     0, /* ttl */
 					     0, /* prettl */
 					     0, /* expttl */
+					     0, /* norecttl */
 					     0, /* an */
 					     0, /* ns */
 					     0, /* ar */
@@ -1987,6 +2000,7 @@ rpz_synthesize_nxdomain(struct rpz* r, struct module_qstate* ms,
 					     0, /* ttl */
 					     0, /* prettl */
 					     0, /* expttl */
+					     0, /* norecttl */
 					     0, /* an */
 					     0, /* ns */
 					     0, /* ar */
@@ -2019,6 +2033,7 @@ rpz_synthesize_localdata_from_rrset(struct rpz* ATTR_UNUSED(r), struct module_qs
                                                   0, /* ttl */
                                                   0, /* prettl */
                                                   0, /* expttl */
+                                                   0, /* norecttl */
                                                   1, /* an */
                                                   0, /* ns */
                                                   0, /* ar */
@@ -2164,6 +2179,7 @@ rpz_synthesize_cname_override_msg(struct rpz* r, struct module_qstate* ms,
                                                   0, /* ttl */
                                                   0, /* prettl */
                                                   0, /* expttl */
+                                                   0, /* norecttl */
                                                   1, /* an */
                                                   0, /* ns */
                                                   0, /* ar */
@@ -2276,15 +2292,18 @@ rpz_apply_nsip_trigger(struct module_qstate* ms, struct query_info* qchase,
 	if(action == RPZ_LOCAL_DATA_ACTION && raddr->data == NULL) {
 		verbose(VERB_ALGO, "rpz: bug: nsip local data action but no local data");
 		ret = rpz_synthesize_nodata(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		goto done;
 	}

 	switch(action) {
 	case RPZ_NXDOMAIN_ACTION:
 		ret = rpz_synthesize_nxdomain(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_NODATA_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_TCP_ONLY_ACTION:
 		/* basically a passthru here but the tcp-only will be
@@ -2294,11 +2313,13 @@ rpz_apply_nsip_trigger(struct module_qstate* ms, struct query_info* qchase,
 		break;
 	case RPZ_DROP_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		ms->is_drop = 1;
 		break;
 	case RPZ_LOCAL_DATA_ACTION:
 		ret = rpz_synthesize_nsip_localdata(r, ms, qchase, raddr, az);
 		if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, qchase, az); }
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_PASSTHRU_ACTION:
 		ret = NULL;
@@ -2306,6 +2327,7 @@ rpz_apply_nsip_trigger(struct module_qstate* ms, struct query_info* qchase,
 		break;
 	case RPZ_CNAME_OVERRIDE_ACTION:
 		ret = rpz_synthesize_cname_override_msg(r, ms, qchase);
+		ms->rpz_applied = 1;
 		break;
 	default:
 		verbose(VERB_ALGO, "rpz: nsip: bug: unhandled or invalid action: '%s'",
@@ -2340,9 +2362,11 @@ rpz_apply_nsdname_trigger(struct module_qstate* ms, struct query_info* qchase,
 	switch(action) {
 	case RPZ_NXDOMAIN_ACTION:
 		ret = rpz_synthesize_nxdomain(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_NODATA_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_TCP_ONLY_ACTION:
 		/* basically a passthru here but the tcp-only will be
@@ -2352,11 +2376,13 @@ rpz_apply_nsdname_trigger(struct module_qstate* ms, struct query_info* qchase,
 		break;
 	case RPZ_DROP_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, qchase, az);
+		ms->rpz_applied = 1;
 		ms->is_drop = 1;
 		break;
 	case RPZ_LOCAL_DATA_ACTION:
 		ret = rpz_synthesize_nsdname_localdata(r, ms, qchase, z, match, az);
 		if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, qchase, az); }
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_PASSTHRU_ACTION:
 		ret = NULL;
@@ -2364,6 +2390,7 @@ rpz_apply_nsdname_trigger(struct module_qstate* ms, struct query_info* qchase,
 		break;
 	case RPZ_CNAME_OVERRIDE_ACTION:
 		ret = rpz_synthesize_cname_override_msg(r, ms, qchase);
+		ms->rpz_applied = 1;
 		break;
 	default:
 		verbose(VERB_ALGO, "rpz: nsdname: bug: unhandled or invalid action: '%s'",
@@ -2400,7 +2427,8 @@ rpz_delegation_point_zone_lookup(struct delegpt* dp, struct local_zones* zones,
 			match->dname = nameserver->name;
 			match->dname_len = nameserver->namelen;
 			if(verbosity >= VERB_ALGO) {
-				char nm[255+1], zn[255+1];
+				char nm[LDNS_MAX_DOMAINLEN];
+				char zn[LDNS_MAX_DOMAINLEN];
 				dname_str(match->dname, nm);
 				dname_str(z->name, zn);
 				if(strcmp(nm, zn) != 0)
@@ -2554,7 +2582,7 @@ struct dns_msg* rpz_callback_from_iterator_cname(struct module_qstate* ms,
 	}

 	if(verbosity >= VERB_ALGO) {
-		char nm[255+1], zn[255+1];
+		char nm[LDNS_MAX_DOMAINLEN], zn[LDNS_MAX_DOMAINLEN];
 		dname_str(is->qchase.qname, nm);
 		dname_str(z->name, zn);
 		if(strcmp(zn, nm) != 0)
@@ -2567,9 +2595,11 @@ struct dns_msg* rpz_callback_from_iterator_cname(struct module_qstate* ms,
 	switch(localzone_type_to_rpz_action(lzt)) {
 	case RPZ_NXDOMAIN_ACTION:
 		ret = rpz_synthesize_nxdomain(r, ms, &is->qchase, a);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_NODATA_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, &is->qchase, a);
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_TCP_ONLY_ACTION:
 		/* basically a passthru here but the tcp-only will be
@@ -2579,11 +2609,13 @@ struct dns_msg* rpz_callback_from_iterator_cname(struct module_qstate* ms,
 		break;
 	case RPZ_DROP_ACTION:
 		ret = rpz_synthesize_nodata(r, ms, &is->qchase, a);
+		ms->rpz_applied = 1;
 		ms->is_drop = 1;
 		break;
 	case RPZ_LOCAL_DATA_ACTION:
 		ret = rpz_synthesize_qname_localdata_msg(r, ms, &is->qchase, z, a);
 		if(ret == NULL) { ret = rpz_synthesize_nodata(r, ms, &is->qchase, a); }
+		ms->rpz_applied = 1;
 		break;
 	case RPZ_PASSTHRU_ACTION:
 		ret = NULL;
@@ -2727,7 +2759,7 @@ rpz_callback_from_worker_request(struct auth_zones* az, struct module_env* env,
 	}

 	if(verbosity >= VERB_ALGO) {
-		char nm[255+1], zn[255+1];
+		char nm[LDNS_MAX_DOMAINLEN], zn[LDNS_MAX_DOMAINLEN];
 		dname_str(qinfo->qname, nm);
 		dname_str(z->name, zn);
 		if(strcmp(zn, nm) != 0)
@@ -2760,3 +2792,31 @@ void rpz_disable(struct rpz* r)
        return;
    r->disabled = 1;
 }
+
+/** Get memory usage for clientip_synthesized_rrset. Ignores memory usage
+ * of locks. */
+static size_t
+rpz_clientip_synthesized_set_get_mem(struct clientip_synthesized_rrset* set)
+{
+	size_t m = sizeof(*set);
+	lock_rw_rdlock(&set->lock);
+	m += regional_get_mem(set->region);
+	lock_rw_unlock(&set->lock);
+	return m;
+}
+
+size_t rpz_get_mem(struct rpz* r)
+{
+	size_t m = sizeof(*r);
+	if(r->taglist)
+		m += r->taglistlen;
+	if(r->log_name)
+		m += strlen(r->log_name) + 1;
+	m += regional_get_mem(r->region);
+	m += local_zones_get_mem(r->local_zones);
+	m += local_zones_get_mem(r->nsdname_zones);
+	m += respip_set_get_mem(r->respip_set);
+	m += rpz_clientip_synthesized_set_get_mem(r->client_set);
+	m += rpz_clientip_synthesized_set_get_mem(r->ns_set);
+	return m;
+}
@@ -269,4 +269,11 @@ void rpz_enable(struct rpz* r);
 */
 void rpz_disable(struct rpz* r);

+/**
+ * Get memory usage of rpz. Caller must manage locks.
+ * @param r: RPZ struct.
+ * @return memory usage.
+ */
+size_t rpz_get_mem(struct rpz* r);
+
 #endif /* SERVICES_RPZ_H */
@@ -43,6 +43,7 @@
 #include "services/view.h"
 #include "services/localzone.h"
 #include "util/config_file.h"
+#include "respip/respip.h"

 int 
 view_cmp(const void* v1, const void* v2)
@@ -66,11 +67,6 @@ views_create(void)
 	return v;
 }

-/* \noop (ignore this comment for doxygen)
- * This prototype is defined in in respip.h, but we want to avoid
- * unnecessary dependencies */
-void respip_set_delete(struct respip_set *set);
-
 void 
 view_delete(struct view* v)
 {
@@ -247,3 +243,38 @@ void views_print(struct views* v)
 	/* TODO implement print */
 	(void)v;
 }
+
+size_t views_get_mem(struct views* vs)
+{
+	struct view* v;
+	size_t m;
+	if(!vs) return 0;
+	m = sizeof(struct views);
+	lock_rw_rdlock(&vs->lock);
+	RBTREE_FOR(v, struct view*, &vs->vtree) {
+		m += view_get_mem(v);
+	}
+	lock_rw_unlock(&vs->lock);
+	return m;
+}
+
+size_t view_get_mem(struct view* v)
+{
+	size_t m = sizeof(*v);
+	lock_rw_rdlock(&v->lock);
+	m += getmem_str(v->name);
+	m += local_zones_get_mem(v->local_zones);
+	m += respip_set_get_mem(v->respip_set);
+	lock_rw_unlock(&v->lock);
+	return m;
+}
+
+void views_swap_tree(struct views* vs, struct views* data)
+{
+	rbnode_type* oldroot = vs->vtree.root;
+	size_t oldcount = vs->vtree.count;
+	vs->vtree.root = data->vtree.root;
+	vs->vtree.count = data->vtree.count;
+	data->vtree.root = oldroot;
+	data->vtree.count = oldcount;
+}
@@ -54,7 +54,8 @@ struct respip_set;
 * Views storage, shared.
 */
 struct views {
-	/** lock on the view tree */
+	/** lock on the view tree. When locking order, the views lock
+	 * is before the forwards,hints,anchors,localzones lock. */
 	lock_rw_type lock;
 	/** rbtree of struct view */
 	rbtree_type vtree;
@@ -135,4 +136,27 @@ void views_print(struct views* v);
 */
 struct view* views_find_view(struct views* vs, const char* name, int write);

+/**
+ * Calculate memory usage of views.
+ * @param vs: the views tree. The routine locks and unlocks the structure
+ * 	for reading.
+ * @return memory in bytes.
+ */
+size_t views_get_mem(struct views* vs);
+
+/**
+ * Calculate memory usage of view.
+ * @param v: the view. The routine locks and unlocks the structure for reading.
+ * @return memory in bytes.
+ */
+size_t view_get_mem(struct view* v);
+
+/**
+ * Swap internal tree with preallocated entries. Caller should manage
+ * the locks.
+ * @param vs: views tree
+ * @param data: preallocated information.
+ */
+void views_swap_tree(struct views* vs, struct views* data);
+
 #endif /* SERVICES_VIEW_H */
@@ -195,6 +195,7 @@ void sldns_key_EVP_unload_gost(void)
 }
 #endif /* USE_GOST */

+#ifdef USE_DSA
 /* Retrieve params as BIGNUM from raw buffer */
 static int
 sldns_key_dsa_buf_bignum(unsigned char* key, size_t len, BIGNUM** p,
@@ -370,6 +371,7 @@ EVP_PKEY *sldns_key_dsa2pkey_raw(unsigned char* key, size_t len)
 	return evp_key;
 #endif
 }
+#endif /* USE_DSA */

 /* Retrieve params as BIGNUM from raw buffer, n is modulus, e is exponent */
 static int
@@ -436,11 +436,13 @@ sldns_b32_ntop_base(const uint8_t* src, size_t src_sz, char* dst, size_t dst_sz,

 		/* ........ ........ ....4444 4....... ........ */
 			 c =  src[3]         >> 7 ;
+		ATTR_FALLTHROUGH
 		/* fallthrough */
 	case 3: dst[4] = b32[(src[2] & 0x0f) << 1 | c];

 		/* ........ .......3 3333.... ........ ........ */
 			 c =  src[2]         >> 4 ;
+		ATTR_FALLTHROUGH
 		/* fallthrough */
 	case 2:	dst[3] = b32[(src[1] & 0x01) << 4 | c];

@@ -449,6 +451,7 @@ sldns_b32_ntop_base(const uint8_t* src, size_t src_sz, char* dst, size_t dst_sz,

 		/* .....111 11...... ........ ........ ........ */
 			 c =  src[1]         >> 6 ;
+		ATTR_FALLTHROUGH
 		/* fallthrough */
 	case 1:	dst[1] = b32[(src[0] & 0x07) << 2 | c];

@@ -460,11 +463,14 @@ sldns_b32_ntop_base(const uint8_t* src, size_t src_sz, char* dst, size_t dst_sz,
 		switch (src_sz) {
 			case 1: dst[2] = '=';
 				dst[3] = '=';
+				ATTR_FALLTHROUGH
 				/* fallthrough */
 			case 2: dst[4] = '=';
+				ATTR_FALLTHROUGH
 				/* fallthrough */
 			case 3: dst[5] = '=';
 				dst[6] = '=';
+				ATTR_FALLTHROUGH
 				/* fallthrough */
 			case 4: dst[7] = '=';
 		}
@@ -577,17 +583,20 @@ sldns_b32_pton_base(const char* src, size_t src_sz, uint8_t* dst, size_t dst_sz,
 			/* ........ ........ ........ .55555.. ........ */
 			/* ........ ........ ....4444 4....... ........ */
 			dst[3] = buf[4] << 7 | buf[5] << 2 | buf[6] >> 3;
+			ATTR_FALLTHROUGH
 			/* fallthrough */

 		case 5: /* ........ ........ ....4444 4....... ........ */
 			/* ........ .......3 3333.... ........ ........ */
 			dst[2] = buf[3] << 4 | buf[4] >> 1;
+			ATTR_FALLTHROUGH
 			/* fallthrough */

 		case 4: /* ........ .......3 3333.... ........ ........ */
 			/* ........ ..22222. ........ ........ ........ */
 			/* .....111 11...... ........ ........ ........ */
 			dst[1] = buf[1] << 6 | buf[2] << 1 | buf[3] >> 4;
+			ATTR_FALLTHROUGH
 			/* fallthrough */

 		case 2: /* .....111 11...... ........ ........ ........ */
@@ -72,7 +72,7 @@ static const sldns_rdf_type type_nsap_wireformat[] = {
 	LDNS_RDF_TYPE_NSAP
 };
 static const sldns_rdf_type type_nsap_ptr_wireformat[] = {
-	LDNS_RDF_TYPE_STR
+	LDNS_RDF_TYPE_UNQUOTED
 };
 static const sldns_rdf_type type_sig_wireformat[] = {
 	LDNS_RDF_TYPE_TYPE, LDNS_RDF_TYPE_ALG, LDNS_RDF_TYPE_INT8, LDNS_RDF_TYPE_INT32,
@@ -86,7 +86,7 @@ static const sldns_rdf_type type_px_wireformat[] = {
 	LDNS_RDF_TYPE_INT16, LDNS_RDF_TYPE_DNAME, LDNS_RDF_TYPE_DNAME
 };
 static const sldns_rdf_type type_gpos_wireformat[] = {
-	LDNS_RDF_TYPE_STR, LDNS_RDF_TYPE_STR, LDNS_RDF_TYPE_STR
+	LDNS_RDF_TYPE_UNQUOTED, LDNS_RDF_TYPE_UNQUOTED, LDNS_RDF_TYPE_UNQUOTED
 };
 static const sldns_rdf_type type_aaaa_wireformat[] = { LDNS_RDF_TYPE_AAAA };
 static const sldns_rdf_type type_loc_wireformat[] = { LDNS_RDF_TYPE_LOC };
@@ -617,6 +617,12 @@ static sldns_rr_descriptor rdata_field_descriptors[] = {
 {(enum sldns_enum_rr_type)0, "TYPE258", 1, 1, type_0_wireformat, LDNS_RDF_TYPE_NONE, LDNS_RR_NO_COMPRESS, 0 },
 #endif

+{(enum sldns_enum_rr_type)0, "TYPE259", 1, 1, type_0_wireformat, LDNS_RDF_TYPE_NONE, LDNS_RR_NO_COMPRESS, 0 },
+{(enum sldns_enum_rr_type)0, "TYPE260", 1, 1, type_0_wireformat, LDNS_RDF_TYPE_NONE, LDNS_RR_NO_COMPRESS, 0 },
+
+	/* 261 */
+	{LDNS_RR_TYPE_RESINFO,  "RESINFO", 1, 0, NULL, LDNS_RDF_TYPE_UNQUOTED, LDNS_RR_NO_COMPRESS, 0 },
+
 /* split in array, no longer contiguous */

 #ifdef DRAFT_RRTYPES
@@ -229,6 +229,8 @@ enum sldns_enum_rr_type
 	LDNS_RR_TYPE_CAA = 257, /* RFC 6844 */
 	LDNS_RR_TYPE_AVC = 258,

+	LDNS_RR_TYPE_RESINFO = 261, /* RFC 9606 */
+
 	/** DNSSEC Trust Authorities */
 	LDNS_RR_TYPE_TA = 32768,
 	/* RFC 4431, 5074, DNSSEC Lookaside Validation */
@@ -341,6 +343,9 @@ enum sldns_enum_rdf_type
        /** 8 * 8 bit hex numbers separated by dashes. For EUI64. */
        LDNS_RDF_TYPE_EUI64,

+	/** Character string without quotes. */
+	LDNS_RDF_TYPE_UNQUOTED,
+
        /** A non-zero sequence of US-ASCII letters and numbers in lower case.
         *  For CAA.
         */
@@ -438,6 +443,7 @@ enum sldns_enum_edns_option
 	LDNS_EDNS_PADDING = 12, /* RFC7830 */
 	LDNS_EDNS_EDE = 15, /* RFC8914 */
 	LDNS_EDNS_CLIENT_TAG = 16, /* draft-bellis-dnsop-edns-tags-01 */
+	LDNS_EDNS_REPORT_CHANNEL = 18, /* RFC9567 */
 	LDNS_EDNS_UNBOUND_CACHEDB_TESTFRAME_TEST = 65534
 };
 typedef enum sldns_enum_edns_option sldns_edns_option;
@@ -365,7 +365,8 @@ static int
 sldns_rdf_type_maybe_quoted(sldns_rdf_type rdf_type)
 {
 	return  rdf_type == LDNS_RDF_TYPE_STR ||
-		rdf_type == LDNS_RDF_TYPE_LONG_STR;
+		rdf_type == LDNS_RDF_TYPE_LONG_STR ||
+		rdf_type == LDNS_RDF_TYPE_UNQUOTED;
 }

 /** see if rdata is quoted */
@@ -1719,6 +1720,8 @@ int sldns_str2wire_rdf_buf(const char* str, uint8_t* rd, size_t* len,
 		return sldns_str2wire_eui48_buf(str, rd, len);
 	case LDNS_RDF_TYPE_EUI64:
 		return sldns_str2wire_eui64_buf(str, rd, len);
+	case LDNS_RDF_TYPE_UNQUOTED:
+		return sldns_str2wire_unquoted_buf(str, rd, len);
 	case LDNS_RDF_TYPE_TAG:
 		return sldns_str2wire_tag_buf(str, rd, len);
 	case LDNS_RDF_TYPE_LONG_STR:
@@ -2554,12 +2557,42 @@ int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len)
 {
 	const char* s = str;
 	size_t slen = strlen(str);
-	size_t dlen = 0; /* number of hexdigits parsed */
+	size_t dlen = 0; /* number of hexdigits parsed for hex,
+		digits for E.164 */

-	/* just a hex string with optional dots? */
-	/* notimpl e.164 format */
 	if(slen > LDNS_MAX_RDFLEN*2)
 		return LDNS_WIREPARSE_ERR_LABEL_OVERFLOW;
+	if(*len < 1)
+		return LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL;
+	if(*s == 0) {
+		/* empty string */
+		rd[0] = 0;
+		*len = 1;
+		return LDNS_WIREPARSE_ERR_OK;
+	}
+	if(s[0] == '+') {
+		rd[0] = 1; /* E.164 format */
+		/* digits '0'..'9', with skipped dots. */
+		s++;
+		while(*s) {
+			if(isspace((unsigned char)*s) || *s == '.') {
+				s++;
+				continue;
+			}
+			if(*s < '0' || *s > '9')
+				return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX, s-str);
+			if(*len < dlen + 2)
+				return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
+					s-str);
+			rd[dlen+1] = *s++;
+			dlen++;
+		}
+		*len = dlen+1;
+		return LDNS_WIREPARSE_ERR_OK;
+	}
+
+	rd[0] = 0; /* AESA format */
+	/* hex, with skipped dots. */
 	while(*s) {
 		if(isspace((unsigned char)*s) || *s == '.') {
 			s++;
@@ -2567,17 +2600,17 @@ int sldns_str2wire_atma_buf(const char* str, uint8_t* rd, size_t* len)
 		}
 		if(!isxdigit((unsigned char)*s))
 			return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
-		if(*len < dlen/2 + 1)
+		if(*len < dlen/2 + 2)
 			return RET_ERR(LDNS_WIREPARSE_ERR_BUFFER_TOO_SMALL,
 				s-str);
 		if((dlen&1)==0)
-			rd[dlen/2] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
-		else	rd[dlen/2] += sldns_hexdigit_to_int(*s++);
+			rd[dlen/2 + 1] = (uint8_t)sldns_hexdigit_to_int(*s++) * 16;
+		else	rd[dlen/2 + 1] += sldns_hexdigit_to_int(*s++);
 		dlen++;
 	}
 	if((dlen&1)!=0)
 		return RET_ERR(LDNS_WIREPARSE_ERR_SYNTAX_HEX, s-str);
-	*len = dlen/2;
+	*len = dlen/2 + 1;
 	return LDNS_WIREPARSE_ERR_OK;
 }

@@ -2746,6 +2779,11 @@ int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len)
 	return LDNS_WIREPARSE_ERR_OK;
 }

+int sldns_str2wire_unquoted_buf(const char* str, uint8_t* rd, size_t* len)
+{
+	return sldns_str2wire_str_buf(str, rd, len);
+}
+
 int sldns_str2wire_tag_buf(const char* str, uint8_t* rd, size_t* len)
 {
 	size_t slen = strlen(str);
@@ -551,6 +551,15 @@ int sldns_str2wire_eui48_buf(const char* str, uint8_t* rd, size_t* len);
 */
 int sldns_str2wire_eui64_buf(const char* str, uint8_t* rd, size_t* len);

+/**
+ * Convert rdf of type LDNS_RDF_TYPE_UNQUOTED from string to wireformat.
+ * @param str: the text to convert for this rdata element.
+ * @param rd: rdata buffer for the wireformat.
+ * @param len: length of rd buffer on input, used length on output.
+ * @return 0 on success, error on failure.
+ */
+int sldns_str2wire_unquoted_buf(const char* str, uint8_t* rd, size_t* len);
+
 /**
 * Convert rdf of type LDNS_RDF_TYPE_TAG from string to wireformat.
 * @param str: the text to convert for this rdata element.
@@ -1241,6 +1241,7 @@ int sldns_wire2str_svcparam_scan(uint8_t** d, size_t* dlen, char** s, size_t* sl
 		r = sldns_wire2str_svcparam_ech2str(s, slen, data_len, *d);
 		break;
 	case SVCB_KEY_DOHPATH:
+		ATTR_FALLTHROUGH
 		/* fallthrough */
 	default:
 		r = sldns_str_print(s, slen, "=\"");
@@ -1343,6 +1344,8 @@ int sldns_wire2str_rdf_scan(uint8_t** d, size_t* dlen, char** s, size_t* slen,
 		return sldns_wire2str_eui48_scan(d, dlen, s, slen);
 	case LDNS_RDF_TYPE_EUI64:
 		return sldns_wire2str_eui64_scan(d, dlen, s, slen);
+	case LDNS_RDF_TYPE_UNQUOTED:
+		return sldns_wire2str_unquoted_scan(d, dlen, s, slen);
 	case LDNS_RDF_TYPE_TAG:
 		return sldns_wire2str_tag_scan(d, dlen, s, slen);
 	case LDNS_RDF_TYPE_LONG_STR:
@@ -1869,7 +1872,33 @@ int sldns_wire2str_nsap_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)

 int sldns_wire2str_atma_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 {
-	return print_remainder_hex("", d, dl, s, sl);
+	uint8_t format;
+	int w = 0;
+	size_t i;
+
+	if(*dl < 1) return -1;
+	format = (*d)[0];
+	(*d)+=1;
+	(*dl)-=1;
+
+	if(format == 0) {
+		/* AESA format (ATM End System Address). */
+		return print_remainder_hex("", d, dl, s, sl);
+	} else if(format == 1) {
+		/* E.164 format. */
+		w += sldns_str_print(s, sl, "+");
+		for(i=0; i<*dl; i++) {
+			if((*d)[i] < '0' || (*d)[0] > '9')
+				return -1;
+			w += sldns_str_print(s, sl, "%c", (*d)[i]);
+		}
+		(*d) += *dl;
+		(*dl) = 0;
+	} else {
+		/* Unknown format. */
+		return -1;
+	}
+	return w;
 }

 /* internal scan routine that can modify arguments on failure */
@@ -2020,6 +2049,26 @@ int sldns_wire2str_eui64_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 	return w;
 }

+int sldns_wire2str_unquoted_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
+{
+	int w = 0;
+	size_t i, len;
+	if(*dl < 1) return -1;
+	len = **d;
+	if(*dl < 1+len) return -1;
+	(*d)++;
+	(*dl)--;
+	for(i=0; i<len; i++) {
+		if(isspace((unsigned char)(*d)[i]) || (*d)[i] == '(' ||
+			(*d)[i] == ')' || (*d)[i] == '\'')
+			w += sldns_str_print(s, sl, "\\%c", (char)(*d)[i]);
+		else	w += str_char_print(s, sl, (*d)[i]);
+	}
+	(*d)+=len;
+	(*dl)-=len;
+	return w;
+}
+
 int sldns_wire2str_tag_scan(uint8_t** d, size_t* dl, char** s, size_t* sl)
 {
 	size_t i, n;
@@ -919,6 +919,19 @@ int sldns_wire2str_eui48_scan(uint8_t** data, size_t* data_len, char** str,
 int sldns_wire2str_eui64_scan(uint8_t** data, size_t* data_len, char** str,
 	size_t* str_len);

+/**
+ * Scan wireformat UNQUOTED field to string, with user buffers.
+ * It shifts the arguments to move along (see sldns_wire2str_pkt_scan).
+ * @param data: wireformat data.
+ * @param data_len: length of data buffer.
+ * @param str: string buffer.
+ * @param str_len: length of string buffer.
+ * @return number of characters (except null) needed to print.
+ * 	Can return -1 on failure.
+ */
+int sldns_wire2str_unquoted_scan(uint8_t** data, size_t* data_len, char** str,
+	size_t* str_len);
+
 /**
 * Scan wireformat TAG field to string, with user buffers.
 * It shifts the arguments to move along (see sldns_wire2str_pkt_scan).
@@ -183,7 +183,9 @@ static const char DS_TRUST_ANCHOR[] =
 	/* The anchors must start on a new line with ". IN DS and end with \n"[;]
 	 * because the makedist script greps on the source here */
 	/* anchor 20326 is from 2017 */
-". IN DS 20326 8 2 E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D\n";
+". IN DS 20326 8 2 E06D44B80B8F1D39A95C0B0D7C65D08458E880409BBC683457104237C7F8EC8D\n"
+	/* anchor 38696 is from 2024 */
+". IN DS 38696 8 2 683D2D0ACB8C9B712A1948B27F741219298D0A450D612C483AF444A4C0FB2B16\n";

 /** verbosity for this application */
 static int verb = 0;
@@ -342,8 +342,6 @@ interfacechecks(struct config_file* cfg)
 	int i, j, i2, j2;
 	char*** resif = NULL;
 	int* num_resif = NULL;
-	char portbuf[32];
-	snprintf(portbuf, sizeof(portbuf), "%d", cfg->port);

 	if(cfg->num_ifs != 0) {
 		resif = (char***)calloc(cfg->num_ifs, sizeof(char**));
@@ -366,15 +364,19 @@ interfacechecks(struct config_file* cfg)
 				cfg->ifs[i]);
 		}
 		/* check for port combinations that are not supported */
-		if(if_is_pp2(resif[i][0], portbuf, cfg->proxy_protocol_port)) {
-			if(if_is_dnscrypt(resif[i][0], portbuf,
+		if(if_is_pp2(resif[i][0], cfg->port, cfg->proxy_protocol_port)) {
+			if(if_is_dnscrypt(resif[i][0], cfg->port,
 				cfg->dnscrypt_port)) {
 				fatal_exit("PROXYv2 and DNSCrypt combination not "
 					"supported!");
-			} else if(if_is_https(resif[i][0], portbuf,
+			} else if(if_is_https(resif[i][0], cfg->port,
 				cfg->https_port)) {
 				fatal_exit("PROXYv2 and DoH combination not "
 					"supported!");
+			} else if(if_is_quic(resif[i][0], cfg->port,
+				cfg->quic_port)) {
+				fatal_exit("PROXYv2 and DoQ combination not "
+					"supported!");
 			}
 		}
 		/* search for duplicates in the returned addresses */
@@ -104,7 +104,7 @@ while getopts 'd:hr' arg; do
 done
 shift $((OPTIND - 1))

-if ! openssl >/dev/null 2>&1; then
+if ! openssl version </dev/null >/dev/null 2>&1; then
    echo "$0 requires openssl to be installed for keys/certificates generation." >&2
    exit 1
 fi
@@ -204,7 +204,8 @@ fi
 # remove unused permissions
 chmod o-rw \
      "$SVR_BASE.pem" \
-      "$SVR_BASE.key" \
+      "$SVR_BASE.key"
+chmod g+r,o-rw \
      "$CTL_BASE.pem" \
      "$CTL_BASE.key"

@@ -109,6 +109,16 @@ usage(void)
 	printf("  				That means the caches sizes and\n");
 	printf("  				the number of threads must not\n");
 	printf("  				change between reloads.\n");
+	printf("  fast_reload [+dpv]		reloads the server but only briefly stops\n");
+	printf("  				server processing, keeps cache, and changes\n");
+	printf("  				most options; check unbound-control(8).\n");
+	printf("  		+d		drops running queries to keep consistency\n");
+	printf("  				on changed options while reloading.\n");
+	printf("  		+p		does not pause threads for even faster\n");
+	printf("  				reload but less options are supported\n");
+	printf("  				; check unbound-control(8).\n");
+	printf("  		+v		verbose output, it will include duration needed.\n");
+	printf("  		+vv		more verbose output, it will include memory needed.\n");
 	printf("  stats				print statistics\n");
 	printf("  stats_noreset			peek at statistics\n");
 #ifdef HAVE_SHMGET
@@ -186,6 +196,10 @@ usage(void)
 	printf("  rpz_enable zone		Enable the RPZ zone if it had previously\n");
 	printf("  				been disabled\n");
 	printf("  rpz_disable zone		Disable the RPZ zone\n");
+	printf("  add_cookie_secret <secret>	add (or replace) a new cookie secret <secret>\n");
+	printf("  drop_cookie_secret		drop a staging cookie secret\n");
+	printf("  activate_cookie_secret	make a staging cookie secret active\n");
+	printf("  print_cookie_secrets		show all cookie secrets with their status\n");
 	printf("Version %s\n", PACKAGE_VERSION);
 	printf("BSD licensed, see LICENSE in source package for details.\n");
 	printf("Report bugs to %s\n", PACKAGE_BUGREPORT);
@@ -218,6 +232,9 @@ static void pr_stats(const char* nm, struct ub_stats_info* s)
 		s->svr.num_queries_cookie_client);
 	PR_UL_NM("num.queries_cookie_invalid",
 		s->svr.num_queries_cookie_invalid);
+	PR_UL_NM("num.queries_discard_timeout",
+		s->svr.num_queries_discard_timeout);
+	PR_UL_NM("num.queries_wait_limit", s->svr.num_queries_wait_limit);
 	PR_UL_NM("num.cachehits",
 		s->svr.num_queries - s->svr.num_queries_missed_cache);
 	PR_UL_NM("num.cachemiss", s->svr.num_queries_missed_cache);
@@ -227,12 +244,13 @@ static void pr_stats(const char* nm, struct ub_stats_info* s)
 	PR_UL_NM("num.expired", s->svr.ans_expired);
 	PR_UL_NM("num.recursivereplies", s->mesh_replies_sent);
 #ifdef USE_DNSCRYPT
-    PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted);
-    PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert);
-    PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext);
-    PR_UL_NM("num.dnscrypt.malformed",
-             s->svr.num_query_dnscrypt_crypted_malformed);
+	PR_UL_NM("num.dnscrypt.crypted", s->svr.num_query_dnscrypt_crypted);
+	PR_UL_NM("num.dnscrypt.cert", s->svr.num_query_dnscrypt_cert);
+	PR_UL_NM("num.dnscrypt.cleartext", s->svr.num_query_dnscrypt_cleartext);
+	PR_UL_NM("num.dnscrypt.malformed",
+		s->svr.num_query_dnscrypt_crypted_malformed);
 #endif /* USE_DNSCRYPT */
+	PR_UL_NM("num.dns_error_reports", s->svr.num_dns_error_reports);
 	printf("%s.requestlist.avg"SQ"%g\n", nm,
 		(s->svr.num_queries_missed_cache+s->svr.num_queries_prefetch)?
 			(double)s->svr.sum_query_list_size/
@@ -289,6 +307,9 @@ static void print_mem(struct ub_shm_stat_info* shm_stat,
 	PR_LL("mem.streamwait", s->svr.mem_stream_wait);
 	PR_LL("mem.http.query_buffer", s->svr.mem_http2_query_buffer);
 	PR_LL("mem.http.response_buffer", s->svr.mem_http2_response_buffer);
+#ifdef HAVE_NGTCP2
+	PR_LL("mem.quic", s->svr.mem_quic);
+#endif
 }

 /** print histogram */
@@ -355,6 +376,9 @@ static void print_extended(struct ub_stats_info* s, int inhibit_zero)
 	PR_UL("num.query.tls_resume", s->svr.qtls_resume);
 	PR_UL("num.query.ipv6", s->svr.qipv6);
 	PR_UL("num.query.https", s->svr.qhttps);
+#ifdef HAVE_NGTCP2
+	PR_UL("num.query.quic", s->svr.qquic);
+#endif

 	/* flags */
 	PR_UL("num.query.flags.QR", s->svr.qbit_QR);
@@ -50,6 +50,8 @@
 #undef calloc
 #undef free
 #undef realloc
+#undef reallocarray
+#undef strdup
 #endif
 #ifdef UNBOUND_ALLOC_LITE
 #undef malloc
@@ -492,7 +494,11 @@ int main(int argc, char* argv[])
 		if(strcmp(use_syslog, "yes") == 0) /* disable use-syslog */
 			check_ub_res(ub_ctx_set_option(ctx, 
 				"use-syslog:", "no"));
+#ifdef UNBOUND_ALLOC_STATS
+		unbound_stat_free_log(use_syslog, __FILE__, __LINE__, __func__);
+#else
 		free(use_syslog);
+#endif
 	}
 	argc -= optind;
 	argv += optind;
@@ -255,3 +255,33 @@ void dtio_mainfdcallback(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
 	log_assert(0);
 }
 #endif
+
+void fast_reload_service_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+
+int fast_reload_client_callback(struct comm_point* ATTR_UNUSED(c),
+	void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
+        struct comm_reply* ATTR_UNUSED(repinfo))
+{
+	log_assert(0);
+	return 0;
+}
+
+#ifdef HAVE_NGTCP2
+void doq_client_event_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
+
+#ifdef HAVE_NGTCP2
+void doq_client_timer_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(ev),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+#endif
@@ -64,10 +64,15 @@ static int key_deleted = 0;
 static ub_thread_key_type thr_debug_key;
 /** the list of threads, so all threads can be examined. NULL if unused. */
 static struct thr_check* thread_infos[THRDEBUG_MAX_THREADS];
+/** stored maximum lock number for threads, when a thread is restarted the
+ * number is kept track of, because the new locks get new id numbers. */
+static int thread_lockcount[THRDEBUG_MAX_THREADS];
 /** do we check locking order */
 int check_locking_order = 1;
 /** the pid of this runset, reasonably unique. */
 static pid_t check_lock_pid;
+/** the name of the output file */
+static const char* output_name = "ublocktrace";
 /**
 * Should checklocks print a trace of the lock and unlock calls.
 * It uses fprintf for that because the log function uses a lock and that
@@ -142,7 +147,8 @@ acquire_locklock(struct checked_lock* lock,

 /** add protected region */
 void 
-lock_protect(void *p, void* area, size_t size)
+lock_protect_place(void* p, void* area, size_t size, const char* def_func,
+	const char* def_file, int def_line, const char* def_area)
 {
 	struct checked_lock* lock = *(struct checked_lock**)p;
 	struct protected_area* e = (struct protected_area*)malloc(
@@ -151,6 +157,10 @@ lock_protect(void *p, void* area, size_t size)
 		fatal_exit("lock_protect: out of memory");
 	e->region = area;
 	e->size = size;
+	e->def_func = def_func;
+	e->def_file = def_file;
+	e->def_line = def_line;
+	e->def_area = def_area;
 	e->hold = malloc(size);
 	if(!e->hold)
 		fatal_exit("lock_protect: out of memory");
@@ -203,6 +213,9 @@ prot_check(struct checked_lock* lock,
 		if(memcmp(p->hold, p->region, p->size) != 0) {
 			log_hex("memory prev", p->hold, p->size);
 			log_hex("memory here", p->region, p->size);
+			log_err("lock_protect on %s %s:%d %s failed",
+				p->def_func, p->def_file, p->def_line,
+				p->def_area);
 			lock_error(lock, func, file, line, 
 				"protected area modified");
 		}
@@ -675,17 +688,33 @@ checklock_unlock(enum check_lock_type type, struct checked_lock* lock,
 	}
 }

+void
+checklock_set_output_name(const char* name)
+{
+	output_name = name;
+}
+
 /** open order info debug file, thr->num must be valid */
 static void 
 open_lockorder(struct thr_check* thr)
 {
 	char buf[24];
 	time_t t;
-	snprintf(buf, sizeof(buf), "ublocktrace.%d", thr->num);
-	thr->order_info = fopen(buf, "w");
-	if(!thr->order_info)
-		fatal_exit("could not open %s: %s", buf, strerror(errno));
-	thr->locks_created = 0;
+	snprintf(buf, sizeof(buf), "%s.%d", output_name, thr->num);
+	thr->locks_created = thread_lockcount[thr->num];
+	if(thr->locks_created == 0) {
+		thr->order_info = fopen(buf, "w");
+		if(!thr->order_info)
+			fatal_exit("could not open %s: %s", buf, strerror(errno));
+	} else {
+		/* There is already a file to append on with the previous
+		 * thread information. */
+		thr->order_info = fopen(buf, "a");
+		if(!thr->order_info)
+			fatal_exit("could not open for append %s: %s", buf, strerror(errno));
+		return;
+	}
+
 	t = time(NULL);
 	/* write: <time_stamp> <runpid> <thread_num> */
 	if(fwrite(&t, sizeof(t), 1, thr->order_info) != 1 ||
@@ -712,6 +741,7 @@ static void* checklock_main(void* arg)
 	if(check_locking_order)
 		open_lockorder(thr);
 	ret = thr->func(thr->arg);
+	thread_lockcount[thr->num] = thr->locks_created;
 	thread_infos[thr->num] = NULL;
 	if(check_locking_order)
 		fclose(thr->order_info);
@@ -90,6 +90,14 @@ struct protected_area {
 	void* hold;
 	/** next protected area in list */
 	struct protected_area* next;
+	/** the place where the lock_protect is made, at init. */
+	const char* def_func;
+	/** the file where the lock_protect is made */
+	const char* def_file;
+	/** the line number where the lock_protect is made */
+	int def_line;
+	/** the text string for the area that is protected, at init call. */
+	const char* def_area;
 };

 /**
@@ -181,12 +189,19 @@ struct checked_lock {
 *	It demangles the lock itself (struct checked_lock**).
 * @param area: ptr to mem.
 * @param size: length of area.
+ * @param def_func: function where the lock_protect() line is.
+ * @param def_file: file where the lock_protect() line is.
+ * @param def_line: line where the lock_protect() line is.
+ * @param def_area: area string
 * You can call it multiple times with the same lock to give several areas.
 * Call it when you are done initializing the area, since it will be copied
 * at this time and protected right away against unauthorised changes until 
 * the next lock() call is done.
 */
-void lock_protect(void* lock, void* area, size_t size);
+void lock_protect_place(void* lock, void* area, size_t size,
+	const char* def_func, const char* def_file, int def_line,
+	const char* def_area);
+#define lock_protect(lock, area, size) lock_protect_place(lock, area, size, __func__, __FILE__, __LINE__, #area)

 /**
 * Remove protected area from lock.
@@ -203,6 +218,13 @@ void lock_unprotect(void* lock, void* area);
 */
 size_t lock_get_mem(void* lock);

+/**
+ * Set the output name, prefix, of the lock check output file(s).
+ * Call it before the checklock_start or thread creation. Pass a fixed string.
+ * @param name: string to use for output data file names.
+ */
+void checklock_set_output_name(const char* name);
+
 /**
 * Initialise checklock. Sets up internal debug structures.
 */
@@ -17,6 +17,7 @@ NEED_IPV6='fwd_ancil.tdir fwd_tcp_tc6.tdir stub_udp6.tdir edns_cache.tdir'
 NEED_NOMINGW='tcp_sigpipe.tdir 07-confroot.tdir 08-host-lib.tdir fwd_ancil.tdir'
 NEED_DNSCRYPT_PROXY='dnscrypt_queries.tdir dnscrypt_queries_chacha.tdir'
 NEED_UNSHARE='acl_interface.tdir proxy_protocol.tdir'
+NEED_REDIS_SERVER='redis_replica.tdir'

 # test if dig and ldns-testns are available.
 test_tool_avail "dig"
@@ -52,6 +53,7 @@ for test in `ls -d *.tdir`; do
 	skip_if_in_list $test "$NEED_WHOAMI" "whoami"
 	skip_if_in_list $test "$NEED_DNSCRYPT_PROXY" "dnscrypt-proxy"
 	skip_if_in_list $test "$NEED_UNSHARE" "unshare"
+	skip_if_in_list $test "$NEED_REDIS_SERVER" "redis-server"

 	if echo $NEED_IPV6 | grep $test >/dev/null; then
 		if test "$HAVE_IPV6" = no; then
@@ -938,7 +938,12 @@ listen_create(struct comm_base* base, struct listen_port* ATTR_UNUSED(ports),
 	char* ATTR_UNUSED(http_endpoint),
 	int ATTR_UNUSED(http_notls),
 	struct tcl_list* ATTR_UNUSED(tcp_conn_limit),
-	void* ATTR_UNUSED(sslctx), struct dt_env* ATTR_UNUSED(dtenv),
+	void* ATTR_UNUSED(dot_sslctx), void* ATTR_UNUSED(doh_sslctx),
+	void* ATTR_UNUSED(quic_ssl),
+	struct dt_env* ATTR_UNUSED(dtenv),
+	struct doq_table* ATTR_UNUSED(table),
+	struct ub_randstate* ATTR_UNUSED(rnd),
+	struct config_file* ATTR_UNUSED(cfg),
 	comm_point_callback_type* cb, void *cb_arg)
 {
 	struct replay_runtime* runtime = (struct replay_runtime*)base;
@@ -1259,7 +1264,7 @@ struct serviced_query* outnet_serviced_query(struct outside_network* outnet,
 	struct replay_runtime* runtime = (struct replay_runtime*)outnet->base;
 	struct fake_pending* pend = (struct fake_pending*)calloc(1,
 		sizeof(struct fake_pending));
-	char z[256];
+	char z[LDNS_MAX_DOMAINLEN];
 	log_assert(pend);
 	log_nametypeclass(VERB_OPS, "pending serviced query",
 		qinfo->qname, qinfo->qtype, qinfo->qclass);
@@ -1479,6 +1484,11 @@ size_t comm_point_get_mem(struct comm_point* ATTR_UNUSED(c))
 	return 0;
 }

+size_t comm_timer_get_mem(struct comm_timer* ATTR_UNUSED(timer))
+{
+	return 0;
+}
+
 size_t serviced_get_mem(struct serviced_query* ATTR_UNUSED(c))
 {
 	return 0;
@@ -1934,7 +1944,8 @@ int comm_point_send_udp_msg(struct comm_point *c, sldns_buffer* packet,
 }

 int outnet_get_tcp_fd(struct sockaddr_storage* ATTR_UNUSED(addr),
-	socklen_t ATTR_UNUSED(addrlen), int ATTR_UNUSED(tcp_mss), int ATTR_UNUSED(dscp))
+	socklen_t ATTR_UNUSED(addrlen), int ATTR_UNUSED(tcp_mss),
+	int ATTR_UNUSED(dscp), int ATTR_UNUSED(nodelay))
 {
 	log_assert(0);
 	return -1;
@@ -1988,4 +1999,24 @@ void http2_stream_remove_mesh_state(struct http2_stream* ATTR_UNUSED(h2_stream))
 {
 }

+void fast_reload_service_cb(int ATTR_UNUSED(fd), short ATTR_UNUSED(event),
+	void* ATTR_UNUSED(arg))
+{
+	log_assert(0);
+}
+
+void fast_reload_thread_stop(
+	struct fast_reload_thread* ATTR_UNUSED(fast_reload_thread))
+{
+	/* nothing */
+}
+
+int fast_reload_client_callback(struct comm_point* ATTR_UNUSED(c),
+	void* ATTR_UNUSED(arg), int ATTR_UNUSED(error),
+        struct comm_reply* ATTR_UNUSED(repinfo))
+{
+	log_assert(0);
+	return 0;
+}
+
 /*********** End of Dummy routines ***********/
@@ -220,7 +220,7 @@ perfsetup(struct perfinfo* info)
 #endif
 		signal(SIGTERM, perf_sigh) == SIG_ERR)
 		fatal_exit("could not bind to signal");
-	info->io = (struct perfio*)calloc(sizeof(struct perfio), info->io_num);
+	info->io = (struct perfio*)calloc(info->io_num, sizeof(struct perfio));
 	if(!info->io) fatal_exit("out of memory");
 #ifndef S_SPLINT_S
 	FD_ZERO(&info->rset);
@@ -501,8 +501,8 @@ qlist_grow_capacity(struct perfinfo* info)
 {
 	size_t newcap = (size_t)((info->qlist_capacity==0)?16:
 		info->qlist_capacity*2);
-	uint8_t** d = (uint8_t**)calloc(sizeof(uint8_t*), newcap);
-	size_t* l = (size_t*)calloc(sizeof(size_t), newcap);
+	uint8_t** d = (uint8_t**)calloc(newcap, sizeof(uint8_t*));
+	size_t* l = (size_t*)calloc(newcap, sizeof(size_t));
 	if(!d || !l) fatal_exit("out of memory");
 	if(info->qlist_data && info->qlist_capacity)
 		memcpy(d, info->qlist_data, sizeof(uint8_t*)*
@@ -72,23 +72,6 @@ int daemon_main(int argc, char* argv[]);
 /** config files (removed at exit) */
 static struct config_strlist* cfgfiles = NULL;

-#ifdef UNBOUND_ALLOC_STATS
-#  define strdup(s) unbound_stat_strdup_log(s, __FILE__, __LINE__, __func__)
-char* unbound_stat_strdup_log(char* s, const char* file, int line,
-	const char* func);
-char* unbound_stat_strdup_log(char* s, const char* file, int line,
-        const char* func) {
-	char* result;
-	size_t len;
-	if(!s) return NULL;
-	len = strlen(s);
-	log_info("%s:%d %s strdup(%u)", file, line, func, (unsigned)len+1);
-	result = unbound_stat_malloc(len+1);
-	memmove(result, s, len+1);
-	return result;
-}
-#endif /* UNBOUND_ALLOC_STATS */
-
 /** give commandline usage for testbound. */
 static void
 testbound_usage(void)
@@ -519,7 +502,7 @@ struct listen_port* daemon_remote_open_ports(struct config_file*

 struct daemon_remote* daemon_remote_create(struct config_file* ATTR_UNUSED(cfg))
 {
-	return (struct daemon_remote*)calloc(1,1);
+	return (struct daemon_remote*)calloc(1, sizeof(struct daemon_remote));
 }

 void daemon_remote_delete(struct daemon_remote* rc)
@@ -617,3 +600,69 @@ void listen_desetup_locks(void)
 {
 	/* nothing */
 }
+
+void fast_reload_printq_list_delete(
+	struct fast_reload_printq* ATTR_UNUSED(list))
+{
+	/* nothing */
+}
+
+void fast_reload_worker_pickup_changes(struct worker* ATTR_UNUSED(worker))
+{
+	/* nothing */
+}
+
+#ifdef HAVE_NGTCP2
+void* quic_sslctx_create(char* ATTR_UNUSED(key), char* ATTR_UNUSED(pem),
+	char* ATTR_UNUSED(verifypem))
+{
+    return NULL;
+}
+
+void comm_point_doq_callback(int ATTR_UNUSED(fd), short ATTR_UNUSED(event),
+	void* ATTR_UNUSED(arg))
+{
+	/* nothing */
+}
+
+int doq_conn_cmp(const void* ATTR_UNUSED(key1), const void* ATTR_UNUSED(key2))
+{
+	return 0;
+}
+
+int doq_conid_cmp(const void* ATTR_UNUSED(key1), const void* ATTR_UNUSED(key2))
+{
+	return 0;
+}
+
+int doq_timer_cmp(const void* ATTR_UNUSED(key1), const void* ATTR_UNUSED(key2))
+{
+	return 0;
+}
+
+int doq_stream_cmp(const void* ATTR_UNUSED(key1), const void* ATTR_UNUSED(key2))
+{
+	return 0;
+}
+
+struct doq_table* doq_table_create(struct config_file* ATTR_UNUSED(cfg),
+	struct ub_randstate* ATTR_UNUSED(rnd))
+{
+	return calloc(1, sizeof(struct doq_table));
+}
+
+void doq_table_delete(struct doq_table* table)
+{
+	free(table);
+}
+
+void doq_timer_cb(void* ATTR_UNUSED(arg))
+{
+	/* nothing */
+}
+
+size_t doq_table_quic_size_get(struct doq_table* ATTR_UNUSED(table))
+{
+	return 0;
+}
+#endif
@@ -39,6 +39,7 @@
 */

 #include "config.h"
+#include <ctype.h>
 #include "util/log.h"
 #include "testcode/unitmain.h"
 #include "util/data/dname.h"
@@ -858,6 +859,151 @@ dname_setup_bufs(sldns_buffer* loopbuf, sldns_buffer* boundbuf)
 	sldns_buffer_flip(boundbuf);
 }

+static void
+dname_test_str(sldns_buffer* buff)
+{
+	char result[LDNS_MAX_DOMAINLEN], expect[LDNS_MAX_DOMAINLEN], *e;
+	size_t i;
+	unit_show_func("util/data/dname.c", "dname_str");
+
+	/* root ; expected OK */
+	sldns_buffer_clear(buff);
+	sldns_buffer_write(buff, "\000", 1);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 1 );
+	unit_assert( pkt_dname_len(buff) == 1 );
+	dname_str(sldns_buffer_begin(buff), result);
+	unit_assert( strcmp( ".", result) == 0 );
+
+	/* LDNS_MAX_DOMAINLEN - 1 ; expected OK */
+	sldns_buffer_clear(buff);
+	sldns_buffer_write(buff,
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /*  64 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 128 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 192 up to here */
+		"\074abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567"     /* 253 up to here */
+		"\000"                                                                 /* 254 up to here */
+		, 254);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 254 );
+	unit_assert( pkt_dname_len(buff) == 254 );
+	dname_str(sldns_buffer_begin(buff), result);
+	unit_assert( strcmp(
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567"
+		".", result) == 0 );
+
+	/* LDNS_MAX_DOMAINLEN ; expected OK */
+	sldns_buffer_clear(buff);
+	sldns_buffer_write(buff,
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /*  64 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 128 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 192 up to here */
+		"\075abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678"    /* 254 up to here */
+		"\000"                                                                 /* 255 up to here */
+		, 255);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 255 );
+	unit_assert( pkt_dname_len(buff) == 255 );
+	dname_str(sldns_buffer_begin(buff), result);
+	unit_assert( strcmp(
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ012345678"
+		".", result) == 0 );
+
+	/* LDNS_MAX_DOMAINLEN + 1 ; expected to fail, output uses '&' on the latest label */
+	sldns_buffer_clear(buff);
+	sldns_buffer_write(buff,
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /*  64 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 128 up to here */
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /* 192 up to here */
+		"\076abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"   /* 255 up to here */
+		"\000"                                                                 /* 256 up to here */
+		, 256);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 256 );
+	unit_assert( pkt_dname_len(buff) == 0 );
+	dname_str(sldns_buffer_begin(buff), result);
+	unit_assert( strcmp(
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"&", result) == 0 );
+
+	/* LDNS_MAX_LABELLEN + 1 ; expected to fail, output uses '#' on the offending label */
+	sldns_buffer_clear(buff);
+	sldns_buffer_write(buff,
+		"\077abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890"  /*  64 up to here */
+		"\100abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890a" /* 129 up to here */
+		"\000"                                                                 /* 130 up to here */
+		, 130);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 130 );
+	unit_assert( pkt_dname_len(buff) == 0 );
+	dname_str(sldns_buffer_begin(buff), result);
+	unit_assert( strcmp(
+		"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890."
+		"#", result) == 0 );
+
+	/* LDNS_MAX_DOMAINLEN with single labels; expected OK */
+	sldns_buffer_clear(buff);
+	for(i=0; i<=252; i+=2)
+		sldns_buffer_write(buff, "\001a", 2);
+	sldns_buffer_write_u8(buff, 0);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 255 );
+	unit_assert( pkt_dname_len(buff) == 255 );
+	dname_str(sldns_buffer_begin(buff), result);
+	e = expect;
+	for(i=0; i<=252; i+=2) {
+		*e++ = 'a';
+		*e++ = '.';
+	}
+	*e = '\0';
+	unit_assert( strcmp(expect, result) == 0 );
+
+	/* LDNS_MAX_DOMAINLEN + 1 with single labels; expected to fail, output uses '&' on the latest label */
+	sldns_buffer_clear(buff);
+	for(i=0; i<=250; i+=2)
+		sldns_buffer_write(buff, "\001a", 2);
+	sldns_buffer_write(buff, "\002ab", 3);
+	sldns_buffer_write_u8(buff, 0);
+	sldns_buffer_flip(buff);
+	unit_assert( sldns_buffer_limit(buff) == 256 );
+	unit_assert( pkt_dname_len(buff) == 0 );
+	dname_str(sldns_buffer_begin(buff), result);
+	e = expect;
+	for(i=0; i<=250; i+=2) {
+		*e++ = 'a';
+		*e++ = '.';
+	}
+	*e++ = '&';
+	*e = '\0';
+	unit_assert( strcmp(expect, result) == 0 );
+
+	/* Only alphas, numericals and '-', '_' and '*' are allowed in the output */
+	for(i=1; i<=255; i++) {
+		if(isalnum(i) || i == '-' || i == '_' || i == '*')
+			continue;
+		sldns_buffer_clear(buff);
+		sldns_buffer_write_u8(buff, 1);
+		sldns_buffer_write_u8(buff, (uint8_t)i);
+		sldns_buffer_write_u8(buff, 0);
+		sldns_buffer_flip(buff);
+		unit_assert( sldns_buffer_limit(buff) == 3 );
+		unit_assert( pkt_dname_len(buff) == 3);
+		dname_str(sldns_buffer_begin(buff), result);
+		if(strcmp( "?.", result) != 0 ) {
+			log_err("ASCII value '0x%lX' allowed in string output", (unsigned long)i);
+			unit_assert(0);
+		}
+	}
+}
+
 void dname_test(void)
 {
 	sldns_buffer* loopbuf = sldns_buffer_new(14);
@@ -884,6 +1030,7 @@ void dname_test(void)
 	dname_test_topdomain();
 	dname_test_valid();
 	dname_test_has_label();
+	dname_test_str(buff);
 	sldns_buffer_free(buff);
 	sldns_buffer_free(loopbuf);
 	sldns_buffer_free(boundbuf);
@@ -0,0 +1,84 @@
+/*
+ * testcode/unitdoq.c - unit test for doq routines.
+ *
+ * Copyright (c) 2022, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/**
+ * \file
+ * Calls doq related unit tests. Exits with code 1 on a failure.
+ */
+
+#include "config.h"
+
+#ifdef HAVE_NGTCP2
+
+#include "util/netevent.h"
+#include "services/listen_dnsport.h"
+#include "testcode/unitmain.h"
+
+/** check the size of a connection for doq */
+static void
+doq_size_conn_check()
+{
+	/* Printout the size of one doq connection, in memory usage.
+	 * A connection with a couple cids, of type doq_conid, and
+	 * it has one stream, and that has a query and an answer. */
+	size_t answer_size = 233; /* size of www.nlnetlabs.nl minimal answer
+		with dnssec and one A record. The unsigned answer is 176 with
+		additional data, 61 bytes minimal response one A record. */
+	size_t query_size = 45; /* size of query for www.nlnetlabs.nl, with
+		an EDNS record with DO flag. */
+	size_t conn_size = sizeof(struct doq_conn);
+	size_t conid_size = sizeof(struct doq_conid);
+	size_t stream_size = sizeof(struct doq_stream);
+
+	conn_size += 16; /* DCID len in the conn key */
+	conn_size += 0; /* the size of the ngtcp2_conn */
+	conn_size += 0; /* the size of the SSL record */
+	conn_size += 0; /* size of the close pkt,
+		but we do not count it here. Only if the conn gets closed. */
+	conid_size += 16; /* the dcid of the conn key */
+	conid_size += 16; /* the cid */
+	stream_size += query_size; /* size of in buffer */
+	stream_size += answer_size; /* size of out buffer */
+	printf("doq connection size %u bytes\n", (unsigned)(conn_size +
+		conid_size*3 + stream_size));
+}
+
+void doq_test(void)
+{
+	unit_show_feature("doq");
+	doq_size_conn_check();
+}
+#endif /* HAVE_NGTCP2 */
@@ -0,0 +1,209 @@
+/*
+ * testcode/unitinfra.c - unit test for infra cache.
+ *
+ * Copyright (c) 2025, NLnet Labs. All rights reserved.
+ *
+ * This software is open source.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * Neither the name of the NLNET LABS nor the names of its contributors may
+ * be used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+ * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+/**
+ * \file
+ * Tests the infra functionality.
+ */
+
+#include "config.h"
+#include "testcode/unitmain.h"
+#include "iterator/iterator.h"
+#include "services/cache/infra.h"
+#include "util/config_file.h"
+#include "util/net_help.h"
+
+/* lookup and get key and data structs easily */
+static struct infra_data* infra_lookup_host(struct infra_cache* infra,
+	struct sockaddr_storage* addr, socklen_t addrlen, uint8_t* zone,
+	size_t zonelen, int wr, time_t now, struct infra_key** k)
+{
+	struct infra_data* d;
+	struct lruhash_entry* e = infra_lookup_nottl(infra, addr, addrlen,
+		zone, zonelen, wr);
+	if(!e) return NULL;
+	d = (struct infra_data*)e->data;
+	if(d->ttl < now) {
+		lock_rw_unlock(&e->lock);
+		return NULL;
+	}
+	*k = (struct infra_key*)e->key;
+	return d;
+}
+
+static void test_keep_probing(struct infra_cache* slab,
+	struct config_file* cfg, struct sockaddr_storage one, socklen_t onelen,
+	uint8_t* zone, size_t zonelen, time_t *now, int keep_probing,
+	int rtt_max_timeout)
+{
+	uint8_t edns_lame;
+	int vs, to, lame, dnsseclame, reclame, probedelay;
+	struct infra_key* k;
+	struct infra_data* d;
+
+	/* configure */
+	cfg->infra_cache_max_rtt = rtt_max_timeout;
+	config_apply_max_rtt(rtt_max_timeout);
+	slab->infra_keep_probing = keep_probing;
+
+	/* expired previous entry */
+	*now += cfg->host_ttl + 10;
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			*now, &vs, &edns_lame, &to) );
+
+	/* simulate timeouts until the USEFUL_SERVER_TOP_TIMEOUT is reached */
+	while(to < USEFUL_SERVER_TOP_TIMEOUT) {
+		unit_assert( infra_rtt_update(slab, &one, onelen, zone, zonelen,
+			LDNS_RR_TYPE_A, -1, to, *now) );
+		unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			*now, &vs, &edns_lame, &to) );
+		unit_assert( vs == 0 && to <= USEFUL_SERVER_TOP_TIMEOUT && edns_lame == 0 );
+	}
+	unit_assert( vs == 0 && to == USEFUL_SERVER_TOP_TIMEOUT && edns_lame == 0 );
+
+	/* don't let the record expire */
+	unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, *now, &k)) );
+	unit_assert( d->timeout_A >= TIMEOUT_COUNT_MAX );
+	unit_assert( d->probedelay > 0 );
+	probedelay = d->probedelay;
+	lock_rw_unlock(&k->entry.lock);
+	cfg->host_ttl = cfg->host_ttl + *now < probedelay
+		?cfg->host_ttl :probedelay + 10;
+
+	/* advance time and check that probing is as expected; we already had a
+	 * lot of A timeouts (checked above). */
+	*now = probedelay;
+	unit_assert( infra_get_lame_rtt(slab, &one, onelen, zone, zonelen,
+		LDNS_RR_TYPE_A, &lame, &dnsseclame, &reclame, &to, *now) );
+	unit_assert( lame == 0 && dnsseclame == 0 && reclame == 0
+		&& to == keep_probing ?still_useful_timeout() :USEFUL_SERVER_TOP_TIMEOUT);
+}
+
+/** test host cache */
+void infra_test(void)
+{
+	struct sockaddr_storage one;
+	socklen_t onelen;
+	uint8_t* zone = (uint8_t*)"\007example\003com\000";
+	size_t zonelen = 13;
+	struct infra_cache* slab;
+	struct config_file* cfg = config_create();
+	time_t now = 0;
+	uint8_t edns_lame;
+	int vs, to;
+	struct infra_key* k;
+	struct infra_data* d;
+	int init = UNKNOWN_SERVER_NICENESS;
+	int default_max_rtt = USEFUL_SERVER_TOP_TIMEOUT;
+
+	unit_show_feature("infra cache");
+	unit_assert(ipstrtoaddr("127.0.0.1", 53, &one, &onelen));
+
+	slab = infra_create(cfg);
+	/* insert new record */
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen, now,
+		&vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init && edns_lame == 0 );
+
+	/* simulate no answer */
+	unit_assert( infra_rtt_update(slab, &one, onelen, zone, zonelen, LDNS_RR_TYPE_A, -1, init, now) );
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init*2 && edns_lame == 0 );
+
+	/* simulate EDNS lame */
+	unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, -1, now) );
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == -1 && to == init*2  && edns_lame == 1);
+
+	/* simulate cache expiry */
+	now += cfg->host_ttl + 10;
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init && edns_lame == 0 );
+
+	/* simulate no lame answer */
+	unit_assert( infra_set_lame(slab, &one, onelen,
+		zone, zonelen,  now, 0, 0, LDNS_RR_TYPE_A) );
+	unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, now, &k)) );
+	unit_assert( d->ttl == now+cfg->host_ttl );
+	unit_assert( d->edns_version == 0 );
+	unit_assert(!d->isdnsseclame && !d->rec_lame && d->lame_type_A &&
+		!d->lame_other);
+	lock_rw_unlock(&k->entry.lock);
+
+	/* test merge of data */
+	unit_assert( infra_set_lame(slab, &one, onelen,
+		zone, zonelen,  now, 0, 0, LDNS_RR_TYPE_AAAA) );
+	unit_assert( (d=infra_lookup_host(slab, &one, onelen, zone, zonelen, 0, now, &k)) );
+	unit_assert(!d->isdnsseclame && !d->rec_lame && d->lame_type_A &&
+		d->lame_other);
+	lock_rw_unlock(&k->entry.lock);
+
+	/* test that noEDNS cannot overwrite known-yesEDNS */
+	now += cfg->host_ttl + 10;
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init && edns_lame == 0 );
+
+	unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, 0, now) );
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init && edns_lame == 1 );
+
+	unit_assert( infra_edns_update(slab, &one, onelen, zone, zonelen, -1, now) );
+	unit_assert( infra_host(slab, &one, onelen, zone, zonelen,
+			now, &vs, &edns_lame, &to) );
+	unit_assert( vs == 0 && to == init && edns_lame == 1 );
+
+	unit_show_feature("infra cache probing (keep-probing off, default infra-cache-max-rtt)");
+	test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 0, default_max_rtt);
+
+	unit_show_feature("infra cache probing (keep-probing on,  default infra-cache-max-rtt)");
+	test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 1, default_max_rtt);
+
+	unit_show_feature("infra cache probing (keep-probing off, low infra-cache-max-rtt)");
+	test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 0, 3000);
+
+	unit_show_feature("infra cache probing (keep-probing on,  low infra-cache-max-rtt)");
+	test_keep_probing(slab, cfg, one, onelen, zone, zonelen, &now, 1, 3000);
+
+	/* Re-apply defaults for other unit tests that follow */
+	config_apply_max_rtt(default_max_rtt);
+
+	infra_delete(slab);
+	config_delete(cfg);
+}
@@ -172,10 +172,14 @@ rr_test_file(const char* input, const char* check)
 		if(txt_in[0] == 0 || txt_in[0] == '\n' || txt_in[0] == ';')
 			continue;
 		/* read check lines */
-		if(!fgets(wire_chk, (int)bufs, chf))
+		if(!fgets(wire_chk, (int)bufs, chf)) {
 			printf("%s too short\n", check);
-		if(!fgets(txt_chk, (int)bufs, chf))
+			unit_assert(0);
+		}
+		if(!fgets(txt_chk, (int)bufs, chf)) {
 			printf("%s too short\n", check);
+			unit_assert(0);
+		}
 		chlineno += 2;
 		if(vbmp) printf("%s:%d %s", check, chlineno-1, wire_chk);
 		if(vbmp) printf("%s:%d %s", check, chlineno, txt_chk);
--- a/Show More
+++ b/Show More