r12648: implement the dns proxy feature

metze
(This used to be commit b07b201c8671e04d6faae162d883d84c79f0ee94)

diff --git a/source4/nbt_server/wins/wins_dns_proxy.c b/source4/nbt_server/wins/wins_dns_proxy.c
index 8fb6396f8791b9ef420b1cfc568b5e330e86bc1b..23dfa19cc665512def9cbfa286c13a99868d129c 100644 (file)
--- a/source4/nbt_server/wins/wins_dns_proxy.c
+++ b/source4/nbt_server/wins/wins_dns_proxy.c
@@ -28,6 +28,38 @@
 #include "libcli/composite/composite.h"
 #include "smbd/service_task.h"
 
+struct wins_dns_proxy_state {
+       struct nbt_name_socket *nbtsock;
+       struct nbt_name_packet *packet;
+       struct nbt_peer_socket src;
+};
+
+static void nbtd_wins_dns_proxy_handler(struct composite_context *creq)
+{
+       NTSTATUS status;
+       struct wins_dns_proxy_state *s = talloc_get_type(creq->async.private_data,
+                                                        struct wins_dns_proxy_state);
+       struct nbt_name *name = &s->packet->questions[0].name;
+       const char *address;
+       const char **addresses;
+       uint16_t nb_flags = 0; /* TODO: ... */
+
+       status = resolve_name_recv(creq, s->packet, &address);
+       if (!NT_STATUS_IS_OK(status)) {
+               goto notfound;
+       }
+
+       addresses = str_list_add(NULL, address);
+       talloc_steal(s->packet, addresses);
+       if (!addresses) goto notfound;
+
+       nbtd_name_query_reply(s->nbtsock, s->packet, &s->src, name, 
+                             0, nb_flags, addresses);
+       return;
+notfound:
+       nbtd_negative_name_query_reply(s->nbtsock, s->packet, &s->src);
+}
+
 /*
   dns proxy query a name
 */
@@ -35,6 +67,29 @@ void nbtd_wins_dns_proxy_query(struct nbt_name_socket *nbtsock,
                               struct nbt_name_packet *packet, 
                               const struct nbt_peer_socket *src)
 {
-       /* TODO: add a real implementation here */
+       struct nbt_name *name = &packet->questions[0].name;
+       struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private,
+                                                      struct nbtd_interface);
+       struct wins_dns_proxy_state *s;
+       struct composite_context *creq;
+       const char *methods[] = {
+               "host",
+               NULL
+       };
+
+       s = talloc(nbtsock, struct wins_dns_proxy_state);
+       if (!s) goto failed;
+       s->nbtsock      = nbtsock;
+       s->packet       = talloc_steal(s, packet);
+       s->src          = *src;
+       talloc_steal(s, src->addr);
+
+       creq = resolve_name_send(name, iface->nbtsrv->task->event_ctx, methods);
+       if (!creq) goto failed;
+
+       creq->async.fn          = nbtd_wins_dns_proxy_handler;
+       creq->async.private_data= s;
+       return;
+failed:
        nbtd_negative_name_query_reply(nbtsock, packet, src);
 }