Use the canonical address during UDP probes.

[meshlink] / src / net_packet.c

diff --git a/src/net_packet.c b/src/net_packet.c
index b32c78f7d467456166e9551ca211242a651361f7..ce1eb62680bd1c25fcb2038dc50892069ab21cce 100644 (file)
--- a/src/net_packet.c
+++ b/src/net_packet.c
@@ -305,7 +305,7 @@ static void send_sptps_packet(meshlink_handle_t *mesh, node_t *n, vpn_packet_t *
        return;
 }
 
-static void choose_udp_address(meshlink_handle_t *mesh, const node_t *n, const sockaddr_t **sa, int *sock) {
+static void choose_udp_address(meshlink_handle_t *mesh, const node_t *n, const sockaddr_t **sa, int *sock, sockaddr_t *sa_buf) {
        /* Latest guess */
        *sa = &n->address;
        *sock = n->sock;
@@ -330,6 +330,22 @@ static void choose_udp_address(meshlink_handle_t *mesh, const node_t *n, const s
                goto check_socket;
        }
 
+       /* Else, if we have a canonical address, try this once every batch */
+       if(mesh->udp_choice == 1 && n->canonical_address) {
+               char *host = xstrdup(n->canonical_address);
+               char *port = strchr(host, ' ');
+
+               if(port) {
+                       *port++ = 0;
+                       *sa_buf = str2sockaddr_random(mesh, host, port);
+                       *sa = sa_buf;
+                       free(host);
+                       goto check_socket;
+               }
+
+               free(host);
+       }
+
        /* Otherwise, address are found in edges to this node.
           So we pick a random edge and a random socket. */
 
@@ -422,13 +438,14 @@ bool send_sptps_data(void *handle, uint8_t type, const void *data, size_t len) {
 
        /* Otherwise, send the packet via UDP */
 
+       sockaddr_t sa_buf;
        const sockaddr_t *sa;
        int sock;
 
        if(to->status.broadcast) {
                choose_broadcast_address(mesh, to, &sa, &sock);
        } else {
-               choose_udp_address(mesh, to, &sa, &sock);
+               choose_udp_address(mesh, to, &sa, &sock, &sa_buf);
        }
 
        if(sendto(mesh->listen_socket[sock].udp.fd, data, len, 0, &sa->sa, SALEN(sa->sa)) < 0 && !sockwouldblock(sockerrno)) {