ComputerSurge/bind9
3
0
Fork 0
Code Pull Requests 1 Activity

EXP turn off edns version neg

Browse Source
This commit is contained in:
Mark Andrews
2025-03-11 15:53:53 +11:00
parent 7d7233dbce
commit f4fe2beb47
1 changed files with 11 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
lib/dns/resolver.c
+11
View File
@@ -810,6 +810,7 @@ typedef struct respctx {
bool ns_in_answer; /* NS may be in the answer
* section */
bool negative; /* is this a negative response? */
bool force_edns_0;
isc_stdtime_t now; /* time info */
isc_time_t tnow;
@@ -8418,6 +8419,10 @@ rctx_edns(respctx_t *rctx) {
"EDNS version negotiation: rcode != "
"BADVERS(16): %u" GREASE_NSID_FMT,
query->rmessage->rcode, GREASE_NSID_INFO);
if (query->rmessage->rcode != dns_rcode_nxdomain &&
query->rmessage->rcode != dns_rcode_noerror) {
rctx->force_edns_0 = true;
}
}
/*
@@ -10125,6 +10130,12 @@ rctx_badserver(respctx_t *rctx, isc_result_t result) {
}
query->addrinfo->flags |= FCTX_ADDRINFO_BADCOOKIE;
rctx->resend = true;
} else if (rctx->force_edns_0) {
unsigned int flags = DNS_FETCHOPT_EDNSVERSIONSET;
unsigned int mask = DNS_FETCHOPT_EDNSVERSIONMASK |
DNS_FETCHOPT_EDNSVERSIONSET;
dns_adb_changeflags(fctx->adb, query->addrinfo, flags, mask);
rctx->resend = true;
} else {
rctx->broken_server = DNS_R_UNEXPECTEDRCODE;
rctx->next_server = true;