MINOR: dns: Cache previous DNS answers.
As DNS servers may not return all IPs in one answer, we want to cache the
previous entries. Those entries are removed when considered obsolete, which
happens when the IP hasn't been returned by the DNS server for a time
defined in the "hold obsolete" parameter of the resolver section. The default
is 30s.
diff --git a/src/cfgparse.c b/src/cfgparse.c
index 8b6aec6..e29ae53 100644
--- a/src/cfgparse.c
+++ b/src/cfgparse.c
@@ -2167,6 +2167,7 @@
curr_resolvers->hold.other = 30000;
curr_resolvers->hold.refused = 30000;
curr_resolvers->hold.timeout = 30000;
+ curr_resolvers->hold.obsolete = 30000;
/* default hold period for valid is 10s */
curr_resolvers->hold.valid = 10000;
curr_resolvers->timeout.retry = 1000;
@@ -2280,8 +2281,10 @@
curr_resolvers->hold.timeout = time;
else if (strcmp(args[1], "valid") == 0)
curr_resolvers->hold.valid = time;
+ else if (strcmp(args[1], "obsolete") == 0)
+ curr_resolvers->hold.obsolete = time;
else {
- Alert("parsing [%s:%d] : '%s' unknown <event>: '%s', expects either 'nx', 'timeout', 'valid', or 'other'.\n",
+ Alert("parsing [%s:%d] : '%s' unknown <event>: '%s', expects either 'nx', 'timeout', 'valid', 'obsolete' or 'other'.\n",
file, linenum, args[0], args[1]);
err_code |= ERR_ALERT | ERR_FATAL;
goto out;