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Linux IPv6 large response support.

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git-svn-id: file:///svn/unbound/trunk@1689 be551aaa-1e26-0410-a405-d3ace91eadb9
This commit is contained in:
Wouter Wijngaards
2009-06-29 13:47:48 +00:00
parent 373758092f
commit d232dbd4a5
2 changed files with 34 additions and 7 deletions
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doc/Changelog
+2
View File
@@ -2,6 +2,8 @@
- ldns trunk r2959 imported as tarball, because of solaris cc compile
support for c99. r2960 for better configure.
- better wrongly_truncated check.
- On Linux, fragment IPv6 datagrams to the IPv6 minimum MTU, to
avoid dropped packets at routers.
26 June 2009: Wouter
- Fix EDNS fallback when EDNS works for short answers but long answers
services/listen_dnsport.c
+32 -7
View File
@@ -92,11 +92,15 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
socklen_t addrlen, int v6only, int* inuse, int* noproto)
{
int s;
# if defined(IPV6_USE_MIN_MTU)
#if defined(IPV6_USE_MIN_MTU)
int on=1;
# else
#endif
#ifdef IPV6_MTU
int mtu = IPV6_MIN_MTU;
#endif
#ifndef IPV6_V6ONLY
(void)v6only;
# endif
#endif
if((s = socket(family, socktype, 0)) == -1) {
*inuse = 0;
#ifndef USE_WINSOCK
@@ -150,21 +154,42 @@ create_udp_sock(int family, int socktype, struct sockaddr* addr,
*/
if (setsockopt(s, IPPROTO_IPV6, IPV6_USE_MIN_MTU,
(void*)&on, (socklen_t)sizeof(on)) < 0) {
#ifndef USE_WINSOCK
# ifndef USE_WINSOCK
log_err("setsockopt(..., IPV6_USE_MIN_MTU, "
"...) failed: %s", strerror(errno));
close(s);
#else
# else
log_err("setsockopt(..., IPV6_USE_MIN_MTU, "
"...) failed: %s",
wsa_strerror(WSAGetLastError()));
closesocket(s);
#endif
# endif
*noproto = 0;
*inuse = 0;
return -1;
}
# endif
# elif defined(IPV6_MTU)
/*
* On Linux, to send no larger than 1280, the PMTUD is
* disabled by default for datagrams anyway, so we set
* the MTU to use.
*/
if (setsockopt(s, IPPROTO_IPV6, IPV6_MTU,
(void*)&mtu, (socklen_t)sizeof(mtu)) < 0) {
# ifndef USE_WINSOCK
log_err("setsockopt(..., IPV6_MTU, ...) failed: %s",
strerror(errno));
close(s);
# else
log_err("setsockopt(..., IPV6_MTU, ...) failed: %s",
wsa_strerror(WSAGetLastError()));
closesocket(s);
# endif
*noproto = 0;
*inuse = 0;
return -1;
}
# endif /* IPv6 MTU */
}
if(bind(s, (struct sockaddr*)addr, addrlen) != 0) {
*noproto = 0;