Merge pull request #6021 from miri64/gnrc_sock/fix/actually-bind-impl…

…icitly

gnrc_sock: actually bind implicitly

sys/net/gnrc/sock/udp/gnrc_sock_udp.c

@@ -182,7 +182,7 @@ ssize_t sock_udp_send(sock_udp_t *sock, const void *data, size_t len,
     }
     if ((remote == NULL) &&
         /* sock can't be NULL as per assertion above */
-        (sock->remote.port == AF_UNSPEC)) {
+        (sock->remote.family == AF_UNSPEC)) {
         return -ENOTCONN;
     }
     /* compiler evaluates lazily so this isn't a redundundant check and cppcheck
@@ -221,11 +221,18 @@ ssize_t sock_udp_send(sock_udp_t *sock, const void *data, size_t len,
         if (sock != NULL) {
             /* bind sock object implicitly */
             sock->local.port = src_port;
+            if (remote == NULL) {
+                sock->local.family = sock->remote.family;
+            }
+            else {
+                sock->local.family = remote->family;
+            }
 #ifdef MODULE_GNRC_SOCK_CHECK_REUSE
             /* prepend to current socks */
             sock->reg.next = (gnrc_sock_reg_t *)_udp_socks;
             _udp_socks = sock;
 #endif
+            gnrc_sock_create(&sock->reg, GNRC_NETTYPE_UDP, src_port);
         }
     }
     else {