96 lines
3.1 KiB
C++
96 lines
3.1 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"
|
|
|
|
static inline bool match_invalid(lpi_data_t *data, lpi_module_t *mod UNUSED) {
|
|
|
|
/* I'm using invalid as a category for flows where both halves of
|
|
* the connection are clearly speaking different protocols,
|
|
* e.g. trying to do HTTP tunnelling via an SMTP server
|
|
*/
|
|
|
|
/* XXX Bittorrent-related stuff is covered in
|
|
* match_invalid_bittorrent() */
|
|
|
|
/* SOCKSv4 via FTP or SMTP
|
|
*
|
|
* The last two octets '\x00\x50' is the port number - in this case
|
|
* I've hard-coded it to be 80 */
|
|
if (match_str_both(data, "220 ", "\x04\x01\x00\x50"))
|
|
return true;
|
|
|
|
/* SOCKSv5 via FTP or SMTP */
|
|
if (match_str_both(data, "220 ", "\x05\x01\x00\x00"))
|
|
return true;
|
|
|
|
/* HTTP tunnelling via FTP or SMTP */
|
|
if (match_str_both(data, "220 ", "CONN"))
|
|
return true;
|
|
if (match_str_both(data, "450 ", "CONN"))
|
|
return true;
|
|
|
|
/* Trying to send HTTP commands to FTP or SMTP servers */
|
|
if (match_str_both(data, "220 ", "GET "))
|
|
return true;
|
|
if (match_str_both(data, "450 ", "GET "))
|
|
return true;
|
|
|
|
/* Trying to send HTTP commands to an SVN server */
|
|
if (match_str_both(data, "( su", "GET "))
|
|
return true;
|
|
|
|
/* People running an HTTP server on the MS SQL server port */
|
|
if (match_tds_request(data->payload[0], data->payload_len[0])) {
|
|
if (MATCHSTR(data->payload[1], "HTTP"))
|
|
return true;
|
|
}
|
|
if (match_tds_request(data->payload[1], data->payload_len[1])) {
|
|
if (MATCHSTR(data->payload[0], "HTTP"))
|
|
return true;
|
|
}
|
|
|
|
|
|
return false;
|
|
}
|
|
|
|
static lpi_module_t lpi_invalid = {
|
|
LPI_PROTO_INVALID,
|
|
LPI_CATEGORY_MIXED,
|
|
"Invalid",
|
|
200, /* Very low priority, but not as low as mystery protos */
|
|
match_invalid
|
|
};
|
|
|
|
void register_invalid(LPIModuleMap *mod_map) {
|
|
register_protocol(&lpi_invalid, mod_map);
|
|
}
|
|
|