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Add --dns-loop-detect feature.

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This commit is contained in:
Simon Kelley
2014-07-29 16:34:14 +01:00
parent 6d8e8ac0fa
commit b5ea1cc255
12 changed files with 233 additions and 18 deletions
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22
src/network.c
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@@ -1298,7 +1298,13 @@ void mark_servers(int flag)
/* mark everything with argument flag */
for (serv = daemon->servers; serv; serv = serv->next)
if (serv->flags & flag)
serv->flags |= SERV_MARK;
{
serv->flags |= SERV_MARK;
#ifdef HAVE_LOOP
/* Give looped servers another chance */
serv->flags &= ~SERV_LOOP;
#endif
}
}
void cleanup_servers(void)
@@ -1320,6 +1326,11 @@ void cleanup_servers(void)
else
up = &serv->next;
}
#ifdef HAVE_LOOP
/* Now we have a new set of servers, test for loops. */
loop_send_probes();
#endif
}
void add_update_server(int flags,
@@ -1385,7 +1396,10 @@ void add_update_server(int flags,
serv->domain = domain_str;
serv->next = next;
serv->queries = serv->failed_queries = 0;
#ifdef HAVE_LOOP
serv->uid = rand32();
#endif
if (domain)
serv->flags |= SERV_HAS_DOMAIN;
@@ -1464,6 +1478,10 @@ void check_servers(void)
else if (!(serv->flags & SERV_LITERAL_ADDRESS))
my_syslog(LOG_INFO, _("using nameserver %s#%d for %s %s"), daemon->namebuff, port, s1, s2);
}
#ifdef HAVE_LOOP
else if (serv->flags & SERV_LOOP)
my_syslog(LOG_INFO, _("NOT using nameserver %s#%d - query loop detected"), daemon->namebuff, port);
#endif
else if (serv->interface[0] != 0)
my_syslog(LOG_INFO, _("using nameserver %s#%d(via %s)"), daemon->namebuff, port, serv->interface);
else