Bind outgoing TCP sockets.

[tinc] / src / net_socket.c

diff --git a/src/net_socket.c b/src/net_socket.c
index a4c7f07..80ae677 100644 (file)
--- a/src/net_socket.c
+++ b/src/net_socket.c
@@ -473,6 +473,33 @@ connect:
                bind_to_interface(c->socket);
        }
 
+       int b = -1;
+
+       for(int i = 0; i < listen_sockets; i++) {
+               if(listen_socket[i].sa.sa.sa_family == c->address.sa.sa_family) {
+                       if(b == -1) {
+                               b = i;
+                       } else  {
+                               b = -1;
+                               break;
+                       }
+               }
+       }
+
+       if(b != -1) {
+               sockaddr_t sa = listen_socket[b].sa;
+               if(sa.sa.sa_family == AF_INET)
+                       sa.in.sin_port = 0;
+               else if(sa.sa.sa_family == AF_INET6)
+                       sa.in6.sin6_port = 0;
+
+               if(bind(c->socket, &sa.sa, SALEN(sa.sa))) {
+                       char *addrstr = sockaddr2hostname(&sa);
+                       logger(LOG_ERR, "Can't bind to %s/tcp: %s", addrstr, sockstrerror(sockerrno));
+                       free(addrstr);
+               }
+       }
+
        /* Connect */
 
        if(!proxytype) {