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- Fix to stop responses with TC flag from resulting in partial

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responses. It retries to fetch the data elsewhere, or fails the
  query and in depth fix removes the TC flag from the cached item.
This commit is contained in:
W.C.A. Wijngaards
2022-10-06 10:01:09 +02:00
parent d122617dd4
commit b043bc5eb4
5 changed files with 38 additions and 14 deletions
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iterator/iterator.c
+2 -2
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@@ -2907,6 +2907,8 @@ processQueryResponse(struct module_qstate* qstate, struct iter_qstate* iq,
(int)((iq->chase_flags&BIT_RD) || iq->chase_to_rd),
iq->response, &iq->qinfo_out, iq->dp);
iq->chase_to_rd = 0;
/* remove TC flag, if this is erroneously set by TCP upstream */
iq->response->rep->flags &= ~BIT_TC;
if(type == RESPONSE_TYPE_REFERRAL && (iq->chase_flags&BIT_RD) &&
!iq->auth_zone_response) {
/* When forwarding (RD bit is set), we handle referrals
@@ -4027,8 +4029,6 @@ process_response(struct module_qstate* qstate, struct iter_qstate* iq,
/* remove CD-bit, we asked for in case we handle validation ourself */
prs->flags &= ~BIT_CD;
/* remove TC flag, if this is erroneously set by TCP upstream */
prs->flags &= ~BIT_TC;
/* normalize and sanitize: easy to delete items from linked lists */
if(!scrub_message(pkt, prs, &iq->qinfo_out, iq->dp->name,