mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-18 20:57:56 +00:00
67 lines
2.4 KiB
C
67 lines
2.4 KiB
C
/*
|
|
Serval DNA MDP overlay network link tracking
|
|
Copyright (C) 2016 Flinders University
|
|
Copyright (C) 2012-2013 Serval Project Inc.
|
|
Copyright (C) 2010-2012 Paul Gardner-Stephen
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#include "serval.h"
|
|
#include "conf.h"
|
|
#include "route_link.h"
|
|
#include "overlay_interface.h"
|
|
#include "overlay_buffer.h"
|
|
#include "debug.h"
|
|
|
|
DEFINE_BINDING(MDP_PORT_STUN, overlay_mdp_service_stun);
|
|
static int overlay_mdp_service_stun(struct internal_mdp_header *header, struct overlay_buffer *payload)
|
|
{
|
|
DEBUGF(overlayrouting, "Processing STUN info from %s", alloca_tohex_sid_t(header->source->sid));
|
|
|
|
while(ob_remaining(payload)>0){
|
|
struct subscriber *subscriber=NULL;
|
|
|
|
// TODO explain addresses, link expiry time, resolve differences between addresses...
|
|
|
|
if (overlay_address_parse(NULL, payload, &subscriber)){
|
|
break;
|
|
}
|
|
struct socket_address addr;
|
|
addr.addrlen = sizeof(addr.inet);
|
|
addr.inet.sin_family = AF_INET;
|
|
addr.inet.sin_addr.s_addr = ob_get_ui32(payload);
|
|
addr.inet.sin_port = ob_get_ui16(payload);
|
|
|
|
if (!subscriber || (subscriber->reachable&REACHABLE_DIRECT))
|
|
continue;
|
|
|
|
// only trust stun responses from our directory service or about the packet sender.
|
|
if (directory_service == header->source || subscriber == header->source){
|
|
overlay_interface *interface = overlay_interface_find(addr.inet.sin_addr, 1);
|
|
if (!interface){
|
|
WARNF("Can't find interface for %s", alloca_socket_address(&addr));
|
|
return 0;
|
|
}
|
|
struct network_destination *destination = create_unicast_destination(&addr, interface);
|
|
if (destination){
|
|
overlay_send_probe(subscriber, destination, OQ_MESH_MANAGEMENT);
|
|
release_destination_ref(destination);
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|