101 lines
2.7 KiB
C++
101 lines
2.7 KiB
C++
|
/*
|
||
|
|
*
|
||
|
|
* Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* This file is part of libprotoident.
|
||
|
|
*
|
||
|
|
* This code has been developed by the University of Waikato WAND
|
||
|
|
* research group. For further information please see http://www.wand.net.nz/
|
||
|
|
*
|
||
|
|
* libprotoident is free software; you can redistribute it and/or modify
|
||
|
|
* it under the terms of the GNU Lesser General Public License as published by
|
||
|
|
* the Free Software Foundation; either version 3 of the License, or
|
||
|
|
* (at your option) any later version.
|
||
|
|
*
|
||
|
|
* libprotoident 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 Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public License
|
||
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include "libprotoident.h"
|
||
|
|
#include "proto_manager.h"
|
||
|
|
#include "proto_common.h"
|
||
|
|
|
||
|
|
/* Multicast DNS */
|
||
|
|
|
||
|
|
static inline bool match_unicast_mdns(lpi_data_t *data) {
|
||
|
|
if (data->server_port != 5353 && data->client_port != 5353) {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Only time I've ever seen this is Russian hackers trying
|
||
|
|
* to get more info about the local network. */
|
||
|
|
|
||
|
|
if (MATCH(data->payload[0], 0x00, 0x00, 0x84, 0x00)) {
|
||
|
|
if (MATCH(data->payload[1], 0x00, 0x00, 0x00, 0x00))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (MATCH(data->payload[1], 0x00, 0x00, 0x84, 0x00)) {
|
||
|
|
if (MATCH(data->payload[0], 0x00, 0x00, 0x00, 0x00))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool match_mdns(lpi_data_t *data, lpi_module_t *mod UNUSED) {
|
||
|
|
|
||
|
|
if (match_unicast_mdns(data))
|
||
|
|
return true;
|
||
|
|
|
||
|
|
if (data->server_port != 5353)
|
||
|
|
return false;
|
||
|
|
if (data->client_port != 5353)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
/* Flags are set */
|
||
|
|
if (MATCH(data->payload[0], 0x00, 0x00, 0x84, 0x00)) {
|
||
|
|
if (data->payload_len[1] == 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (MATCH(data->payload[1], 0x00, 0x00, 0x84, 0x00)) {
|
||
|
|
if (data->payload_len[0] == 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Flags are not set - this is tricky because the payload is zero */
|
||
|
|
if (data->payload_len[0] != 0 && data->payload[0] == 0) {
|
||
|
|
if (data->payload_len[1] == 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (data->payload_len[1] != 0 && data->payload[1] == 0) {
|
||
|
|
if (data->payload_len[0] == 0)
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static lpi_module_t lpi_mdns = {
|
||
|
|
LPI_PROTO_UDP_MDNS,
|
||
|
|
LPI_CATEGORY_SERVICES,
|
||
|
|
"mDNS",
|
||
|
|
20,
|
||
|
|
match_mdns
|
||
|
|
};
|
||
|
|
|
||
|
|
void register_mdns(LPIModuleMap *mod_map) {
|
||
|
|
register_protocol(&lpi_mdns, mod_map);
|
||
|
|
}
|
||
|
|
|