Do not break lua plugins if there is no DNS.

diff --git a/src/dns.c b/src/dns.c
index b479ac576bfcebd161ca749c3f4f67b7516490fe..9328c57a7c19023396d2c15626693be461de9c20 100644 (file)
--- a/src/dns.c
+++ b/src/dns.c
@@ -1435,6 +1435,10 @@ make_dns_request (struct rspamd_dns_resolver *resolver,
        gint r;
        struct dns_header *header;
 
+       /* If no DNS servers defined silently return FALSE */
+       if (resolver->servers_num == 0) {
+               return FALSE;
+       }
        /* Check throttling */
        if (resolver->throttling) {
                return FALSE;
@@ -1629,7 +1633,7 @@ dns_resolver_init (struct event_base *ev_base, struct config_file *cfg)
                /* Parse resolv.conf */
                if (! parse_resolv_conf (new) || new->servers_num == 0) {
                        msg_err ("cannot parse resolv.conf and no nameservers defined, so no ways to resolve addresses");
-                       return NULL;
+                       return new;
                }
        }
        else {
@@ -1684,7 +1688,7 @@ dns_resolver_init (struct event_base *ev_base, struct config_file *cfg)
                        msg_err ("no valid nameservers defined, try to parse resolv.conf");
                        if (! parse_resolv_conf (new) || new->servers_num == 0) {
                                msg_err ("cannot parse resolv.conf and no nameservers defined, so no ways to resolve addresses");
-                               return NULL;
+                               return new;
                        }
                }