[TIPC]: Can now return destination name of form {0,x,y} via ancillary data.

Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Per Liden <per.liden@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 6 insertions, 2 deletions

diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index 98550b90a730..361dc342f377 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c
@@ -731,6 +731,7 @@ static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
         u32 anc_data[3];
         u32 err;
         u32 dest_type;
+        int has_name;
         int res;
 
         if (likely(m->msg_controllen == 0))
@@ -755,24 +756,27 @@ static int anc_data_recv(struct msghdr *m, struct tipc_msg *msg,
         dest_type = msg ? msg_type(msg) : TIPC_DIRECT_MSG;
         switch (dest_type) {
         case TIPC_NAMED_MSG:
+                has_name = 1;
                 anc_data[0] = msg_nametype(msg);
                 anc_data[1] = msg_namelower(msg);
                 anc_data[2] = msg_namelower(msg);
                 break;
         case TIPC_MCAST_MSG:
+                has_name = 1;
                 anc_data[0] = msg_nametype(msg);
                 anc_data[1] = msg_namelower(msg);
                 anc_data[2] = msg_nameupper(msg);
                 break;
         case TIPC_CONN_MSG:
+                has_name = (tport->conn_type != 0);
                 anc_data[0] = tport->conn_type;
                 anc_data[1] = tport->conn_instance;
                 anc_data[2] = tport->conn_instance;
                 break;
         default:
-                anc_data[0] = 0;
+                has_name = 0;
         }
-        if (anc_data[0] &&
+        if (has_name &&
             (res = put_cmsg(m, SOL_SOCKET, TIPC_DESTNAME, 12, anc_data)))
                 return res;