Changeset 19688 in vbox

Timestamp:

May 14, 2009 11:45:54 AM (16 years ago)

Author:

vboxsync

Message:

NAT: fix (#3900) don't create request if no dns server registered in dns proxy

File:

• trunk/src/VBox/Devices/Network/slirp/dnsproxy/dnsproxy.c (modified) (1 diff)

trunk/src/VBox/Devices/Network/slirp/dnsproxy/dnsproxy.c

@@ -269 +269 @@
         memcpy(&req->client, &fromaddr, sizeof(struct sockaddr_in));
         memcpy(&req->clientid, &buf[0], 2);
+        req->dns_server = LIST_FIRST(&pData->dns_list_head);
+        if (req->dns_server == NULL)
+        {
+            static int fail_counter = 0;
+            RTMemFree(req);
+            if (fail_counter == 0)
+                LogRel(("NAT/dnsproxy: Empty DNS entry (suppressed 100 times)\n"));
+            else 
+                fail_counter = (fail_counter == 100 ? 0 : fail_counter++);
+            return;
+            
+        }
+        retransmit = 0;
         so->so_timeout = timeout;
         so->so_timeout_arg = req;
-        retransmit = 0;
-        req->dns_server = LIST_FIRST(&pData->dns_list_head);
         req->nbyte = byte;
         memcpy(req->byte, buf, byte); /* copying original request */