mirror of
https://github.com/isc-projects/bind9.git
synced 2026-03-26 12:23:04 -04:00
33350626f9
Since following a delegation resets most fetch context state, address marks (FCTX_ADDRINFO_MARK) set inside lib/dns/resolver.c are not preserved when a delegation is followed. This is fine for full recursive resolution but when named is configured with "forward first;" and one of the specified forwarders times out, triggering a fallback to full recursive resolution, that forwarder should no longer be consulted at each delegation point subsequently reached within a given fetch context. Add a new badnstype_t enum value, badns_forwarder, and use it to mark a forwarder as bad when it times out in a "forward first;" configuration. Since the bad server list is not cleaned when a fetch context follows a delegation, this prevents a forwarder from being queried again after falling back to full recursive resolution. Yet, as each fetch context maintains its own list of bad servers, this change does not cause a forwarder timeout to prevent that forwarder from being used by other fetch contexts. |
||
|---|---|---|
| .. | ||
| check | ||
| confgen | ||
| delv | ||
| dig | ||
| dnssec | ||
| named | ||
| nsupdate | ||
| pkcs11 | ||
| plugins | ||
| python | ||
| rndc | ||
| tests | ||
| tools | ||
| win32/BINDInstall | ||
| Makefile.in | ||