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 bool decrement_ttl = false;
30 static bool checklength(node_t *source, vpn_packet_t *packet, uint16_t length) {
31 if(packet->len < length) {
32 logger(DEBUG_TRAFFIC, LOG_WARNING, "Got too short packet from %s (%s)", source->name, source->hostname);
38 void route(meshlink_handle_t *mesh, node_t *source, vpn_packet_t *packet) {
39 // TODO: route on name or key
43 meshlink_packethdr_t* hdr = (meshlink_packethdr_t*)packet->data;
44 owner = lookup_node(mesh, hdr->destination);
45 logger(DEBUG_TRAFFIC, LOG_WARNING, "Routing packet from: %s . To: %s \n",hdr->source,hdr->destination);
48 if(!checklength(source, packet, (sizeof(meshlink_packethdr_t))))
53 logger(DEBUG_TRAFFIC, LOG_WARNING, "Cant lookup the owner of a packet in the route() function. This should never happen \n");
54 logger(DEBUG_TRAFFIC, LOG_WARNING, "Destination was: %s \n",hdr->destination);
58 if (owner == mesh->self ) {
59 //TODO: implement sending received data from meshlink library to the application
60 logger(DEBUG_TRAFFIC, LOG_WARNING, "I received a packet for me with payload: %s \n", packet->data + sizeof *hdr);
61 (meshlink_receive_cb_t)(packet->data + sizeof *hdr);
65 if(!owner->status.reachable) {
66 //TODO: check what to do here, not just print a warning
67 logger(DEBUG_TRAFFIC, LOG_WARNING, "The owner of a packet in the route() function is unreachable. Dropping packet. \n");
71 via = (owner->via == mesh->self) ? owner->nexthop : owner->via;
73 logger(DEBUG_TRAFFIC, LOG_ERR, "Routing loop for packet from %s (%s)!", source->name, source->hostname);
77 send_packet(mesh, owner, packet);