3 Copyright (C) 2014 Guus Sliepen <guus@meshlink.io>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 #include "meshlink_internal.h"
28 static bool checklength(node_t *source, vpn_packet_t *packet, uint16_t length) {
31 if(packet->len < length) {
32 logger(source->mesh, MESHLINK_WARNING, "Got too short packet from %s", source->name);
39 void route(meshlink_handle_t *mesh, node_t *source, vpn_packet_t *packet) {
42 // TODO: route on name or key
44 meshlink_packethdr_t *hdr = (meshlink_packethdr_t *) packet->data;
45 node_t *dest = lookup_node(mesh, (char *)hdr->destination);
46 logger(mesh, MESHLINK_DEBUG, "Routing packet from \"%s\" to \"%s\"\n", hdr->source, hdr->destination);
49 if(!checklength(source, packet, sizeof(*hdr))) {
55 logger(mesh, MESHLINK_WARNING, "Can't lookup the destination of a packet in the route() function. This should never happen!\n");
56 logger(mesh, MESHLINK_WARNING, "Destination was: %s\n", hdr->destination);
60 if(dest == mesh->self) {
61 const void *payload = packet->data + sizeof(*hdr);
62 size_t len = packet->len - sizeof(*hdr);
64 char hex[len * 2 + 1];
66 if(mesh->log_level <= MESHLINK_DEBUG) {
67 bin2hex(payload, hex, len); // don't do this unless it's going to be logged
70 logger(mesh, MESHLINK_DEBUG, "I received a packet for me with payload: %s\n", hex);
72 if(mesh->receive_cb) {
73 mesh->receive_cb(mesh, (meshlink_node_t *)source, payload, len);
79 if(!dest->status.reachable) {
80 //TODO: check what to do here, not just print a warning
81 logger(mesh, MESHLINK_WARNING, "The destination of a packet in the route() function is unreachable. Dropping packet.\n");
86 logger(mesh, MESHLINK_ERROR, "Routing loop for packet from %s!", source->name);
90 send_packet(mesh, dest, packet);