- completely rewrote the wins_srv.c code. It is now much simpler, and

gives us a good grounding to properly support multiple wins servers
for different interfaces (which will be coming soon ...)

- fixed our wins registration failover code to actually do failover!
We were not trying to register with a secondary wins server at all
when the primary was down. We now fallback correctly.

- fixed the multi-homed name registration packets so that they work
even in a non-connected network (ie. when one of our interfaces is not
routable from the wins server. Yes, this really happens in the real
world).
(This used to be commit a049360d5b0d95a935b06aad43efc17d34de46dc)

3 files changed, 29 insertions, 7 deletions

diff --git a/source3/nmbd/nmbd_nameregister.c b/source3/nmbd/nmbd_nameregister.c
index cbc72fe2a9..cc1fac5577 100644
--- a/source3/nmbd/nmbd_nameregister.c
+++ b/source3/nmbd/nmbd_nameregister.c
@@ -197,6 +197,15 @@ static void register_name_timeout_response(struct subnet_record *subrec,
       DEBUG(2,("register_name_timeout_response: WINS server at address %s is not \
 responding.\n", inet_ntoa(rrec->packet->ip)));
 
+      /* mark it temporarily dead */
+      wins_srv_died(rrec->packet->ip);
+
+      /* and try the next wins server in our failover list */
+      rrec->packet->ip = wins_srv_ip();
+
+      /* also update the UNICODE subnet IPs */
+      subrec->bcast_ip = subrec->mask_ip = subrec->myip = rrec->packet->ip;
+
       /* Keep trying to contact the WINS server periodically. This allows
          us to work correctly if the WINS server is down temporarily when
          we come up. */
diff --git a/source3/nmbd/nmbd_namerelease.c b/source3/nmbd/nmbd_namerelease.c
index fd35181f33..cefab44a08 100644
--- a/source3/nmbd/nmbd_namerelease.c
+++ b/source3/nmbd/nmbd_namerelease.c
@@ -147,9 +147,14 @@ static void release_name_timeout_response(struct subnet_record *subrec,
       DEBUG(2,("release_name_timeout_response: WINS server at address %s is not \
 responding.\n", inet_ntoa(rrec->packet->ip)));
 
-      /* Keep trying to contact the WINS server periodically. This allows
-         us to work correctly if the WINS server is down temporarily when
-         we want to delete the name. */
+      /* mark it temporarily dead */
+      wins_srv_died(rrec->packet->ip);
+
+      /* and try the next wins server */
+      rrec->packet->ip = wins_srv_ip();
+
+      /* also update the UNICODE subnet IPs */
+      subrec->bcast_ip = subrec->mask_ip = subrec->myip = rrec->packet->ip;
 
       /* Reset the number of attempts to zero and double the interval between
          retries. Max out at 5 minutes. */
diff --git a/source3/nmbd/nmbd_packets.c b/source3/nmbd/nmbd_packets.c
index a11b30b1dc..b5741caae0 100644
--- a/source3/nmbd/nmbd_packets.c
+++ b/source3/nmbd/nmbd_packets.c
@@ -264,11 +264,19 @@ static BOOL create_and_init_additional_record(struct packet_struct *packet,
   /* Set the address for the name we are registering. */
   putip(&nmb->additional->rdata[2], register_ip);
 
-  /* Ensure that we send out the file descriptor to give us the
-     the specific source address we are registering as our
-     IP source address. */
-
+#if 0
+  /* I removed this forced source IP as it breaks wins failover. The
+     problem is that our 2nd interface IP may not be routable to the
+     wins server, in which case all these nice packets we are senidng
+     out will never get a response and we end up marking a perfectly good wins server dead. 
+
+     In general I can't see any reason why we should force the source
+     ip on a packet anyway. We should just let the kernels routin
+     table take care of it, as that is the only place which really
+     knows what is routable and what isn't. (tridge)
+  */
   packet->fd = find_subnet_fd_for_address( *register_ip );
+#endif
 
   return True;
 }