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only set FCTX_ADDRINFO_NOSIT if we don't have a existing sit

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This commit is contained in:
Mark Andrews
2014-03-20 07:17:00 +11:00
parent 09ab38c151
commit a78ffa0cc8
1 changed files with 12 additions and 4 deletions
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16
lib/dns/resolver.c
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@@ -7505,6 +7505,9 @@ resquery_response(isc_task_t *task, isc_event_t *event) {
} else if (message->rcode == dns_rcode_badvers) {
unsigned int flags, mask;
unsigned int version;
#ifdef ISC_PLATFORM_USESIT
unsigned char sit[64];
#endif
inc_stats(fctx->res, dns_resstatscounter_badvers);
@@ -7512,11 +7515,16 @@ resquery_response(isc_task_t *task, isc_event_t *event) {
/*
* Some servers return BADVERS to unknown
* EDNS options. This cannot be long term
* strategy.
* strategy. Do not disable SIT if we have
* already have received a SIT from this
* server.
*/
dns_adb_changeflags(fctx->adb, query->addrinfo,
FCTX_ADDRINFO_NOSIT,
FCTX_ADDRINFO_NOSIT);
if (dns_adb_getsit(fctx->adb, query->addrinfo,
sit, sizeof(sit)) == 0U) {
dns_adb_changeflags(fctx->adb, query->addrinfo,
FCTX_ADDRINFO_NOSIT,
FCTX_ADDRINFO_NOSIT);
}
#endif
resend = ISC_TRUE;