97 lines
2.5 KiB
C++
97 lines
2.5 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"
|
||
|
|
|
||
|
|
/* Not 100% sure what this is but:
|
||
|
|
* - it's on port 53 but is definitely not DNS
|
||
|
|
* - involves servers owned by 360.cn, who 'supposedly' are antivirus experts
|
||
|
|
* - the protocol appears to be a custom encryption protocol
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
static inline bool match_360cn_0102(uint32_t a, uint32_t b) {
|
||
|
|
|
||
|
|
|
||
|
|
if (a != b)
|
||
|
|
return false;
|
||
|
|
if (MATCH(a, ANY, ANY, 0x01, 0x02))
|
||
|
|
return true;
|
||
|
|
return false;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool match_360cn_0a04(uint32_t pload, uint32_t len) {
|
||
|
|
|
||
|
|
uint32_t hdrlen = (ntohl(pload)) & 0xffff;
|
||
|
|
|
||
|
|
if (len == 0)
|
||
|
|
return true;
|
||
|
|
|
||
|
|
if (!MATCH(pload, 0x0a, 0x04, ANY, ANY))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if (hdrlen + 10 == len)
|
||
|
|
return true;
|
||
|
|
|
||
|
|
return false;
|
||
|
|
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline bool match_360cn(lpi_data_t *data, lpi_module_t *mod UNUSED) {
|
||
|
|
|
||
|
|
if (data->server_port != 53 && data->client_port != 53)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
if (match_360cn_0102(data->payload[0], data->payload[1]))
|
||
|
|
return true;
|
||
|
|
|
||
|
|
if (match_360cn_0a04(data->payload[0], data->payload_len[0])) {
|
||
|
|
if (match_360cn_0a04(data->payload[1], data->payload_len[1]))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static lpi_module_t lpi_360cn = {
|
||
|
|
LPI_PROTO_UDP_360CN,
|
||
|
|
LPI_CATEGORY_SECURITY,
|
||
|
|
"360.cn",
|
||
|
|
50,
|
||
|
|
match_360cn
|
||
|
|
};
|
||
|
|
|
||
|
|
void register_360cn(LPIModuleMap *mod_map) {
|
||
|
|
register_protocol(&lpi_360cn, mod_map);
|
||
|
|
}
|
||
|
|
|