86 lines
2.8 KiB
C++
86 lines
2.8 KiB
C++
/*
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*
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* Copyright (c) 2011-2016 The University of Waikato, Hamilton, New Zealand.
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* All rights reserved.
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*
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* This file is part of libprotoident.
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*
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* This code has been developed by the University of Waikato WAND
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* research group. For further information please see http://www.wand.net.nz/
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*
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* libprotoident is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* libprotoident is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*
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*/
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#include <string.h>
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#include "libprotoident.h"
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#include "proto_manager.h"
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#include "proto_common.h"
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static inline bool match_invalid_bittorrent(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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/* This function will match anyone doing bittorrent in one
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* direction and *something else* in the other.
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*
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* I've broken it down into several separate conditions, just in case
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* we want to treat them as separate instances later on */
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/* People trying to do Bittorrent to an actual HTTP server, rather than
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* someone peering on port 80 */
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if (match_str_either(data, "HTTP") &&
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match_chars_either(data, 0x13, 'B', 'i', 't'))
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return true;
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/* People sending GETs to a Bittorrent peer?? */
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if (match_str_either(data, "GET ") &&
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match_chars_either(data, 0x13, 'B', 'i', 't'))
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return true;
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/* We also get a bunch of cases where one end is doing bittorrent
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* and the other end is speaking a protocol that begins with a 4
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* byte length field. */
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if (match_chars_either(data, 0x13, 'B', 'i', 't')) {
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if (match_payload_length(data->payload[0],data->payload_len[0]))
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return true;
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if (match_payload_length(data->payload[1],data->payload_len[1]))
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return true;
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}
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/* This assumes we've checked for regular bittorrent prior to calling
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* this function! */
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if (match_chars_either(data, 0x13, 'B', 'i', 't'))
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return true;
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return false;
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}
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static lpi_module_t lpi_invalid_bittorrent = {
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LPI_PROTO_INVALID_BT,
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LPI_CATEGORY_MIXED,
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"Invalid_Bittorrent",
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200,
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match_invalid_bittorrent
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};
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void register_invalid_bittorrent(LPIModuleMap *mod_map) {
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register_protocol(&lpi_invalid_bittorrent, mod_map);
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}
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