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Do not resend TCP requests

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The req_response() function is using 'udpcount' variable to resend
the request 'udpcount' times on timeout even for TCP requests,
which does not make sense, as it would use the same connection.

Add a condition to use the resend logic only for UDP requests.

(cherry picked from commit edcdb881da)
This commit is contained in:
Aram Sargsyan 2022-12-12 12:12:13 +00:00
parent 14084d8eac
commit 7beda284d2
1 changed files with 3 additions and 1 deletions
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4
lib/dns/request.c
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@ -1061,7 +1061,9 @@ req_response(isc_result_t result, isc_region_t *region, void *arg) {
if (result == ISC_R_TIMEDOUT) {
LOCK(&request->requestmgr->locks[request->hash]);
if (request->udpcount > 1) {
if (request->udpcount > 1 &&
(request->flags & DNS_REQUEST_F_TCP) == 0)
{
request->udpcount -= 1;
dns_dispatch_resume(request->dispentry,
request->timeout);