97 lines
2.8 KiB
C++
97 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_bittorrent_header(uint32_t payload, uint32_t len) {
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if (len == 0)
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return true;
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if (MATCH(payload, 0x13, 'B', 'i', 't'))
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return true;
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if (len == 3 && MATCH(payload, 0x13, 'B', 'i', 0x00))
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return true;
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if (len == 2 && MATCH(payload, 0x13, 'B', 0x00, 0x00))
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return true;
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if (len == 1 && MATCH(payload, 0x13, 0x00, 0x00, 0x00))
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return true;
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return false;
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}
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static inline bool match_ww_xx_header(uint32_t payload, uint32_t len) {
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/* Fairly confident that this is related to Bittorrent, though I
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* can't seem to find any source code or documentation that references
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* it.
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*
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* The full string included in the header is:
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* 0x13 #WW-XX#@77
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*/
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if (len == 0)
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return true;
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if (MATCH(payload, 0x13, 0x23, 0x57, 0x57))
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return true;
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return false;
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}
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static inline bool match_bittorrent(lpi_data_t *data, lpi_module_t *mod UNUSED)
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{
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if (match_bittorrent_header(data->payload[0], data->payload_len[0])) {
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if (match_bittorrent_header(data->payload[1],
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data->payload_len[1]))
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return true;
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}
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if (match_ww_xx_header(data->payload[0], data->payload_len[0])) {
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if (match_ww_xx_header(data->payload[1], data->payload_len[1]))
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return true;
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}
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return false;
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}
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static lpi_module_t lpi_bittorrent = {
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LPI_PROTO_BITTORRENT,
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LPI_CATEGORY_P2P,
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"BitTorrent",
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2,
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match_bittorrent
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};
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void register_bittorrent(LPIModuleMap *mod_map) {
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register_protocol(&lpi_bittorrent, mod_map);
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}
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