93 lines
2.9 KiB
C++
93 lines
2.9 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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/** XXX This module is currently disabled due to a tendency to overmatch! */
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static inline bool match_mystery_emule(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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/* These particular patterns occur frequently on port 4672, making
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* me think they're some sort of emule traffic but there is no
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* obvious documentation. The payloads appear to be random, which
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* is unlike all other emule traffic. The flows tend to consist of
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* only one or two packets in each direction.
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*
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* XXX Comparison with DPI tools suggest that this is indeed eMule!
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*
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*/
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if (data->payload_len[0] == 44 && data->payload_len[1] >= 38 &&
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data->payload_len[1] <= 50)
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return true;
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if (data->payload_len[1] == 44 && data->payload_len[0] >= 38 &&
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data->payload_len[0] <= 50)
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return true;
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if (data->payload_len[0] == 51 && (data->payload_len[1] == 135 ||
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data->payload_len[1] == 85 ||
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data->payload_len[1] == 310))
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return true;
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if (data->payload_len[1] == 51 && (data->payload_len[0] == 135 ||
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data->payload_len[0] == 85 ||
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data->payload_len[0] == 310))
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return true;
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return false;
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}
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static inline bool match_emule_weak_udp(lpi_data_t *data,
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lpi_module_t *mod UNUSED) {
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/* This covers a particular branch of emule traffic which is harder
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* to reliably detect than even regular emule (which isn't great to
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* begin with).
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*/
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if (match_mystery_emule(data, NULL))
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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_emule_weak_udp = {
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LPI_PROTO_UDP_EMULE,
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LPI_CATEGORY_P2P,
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"eMule_UDP",
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20,
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match_emule_weak_udp
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};
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void register_emule_weak_udp(LPIModuleMap *mod_map) {
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register_protocol(&lpi_emule_weak_udp, mod_map);
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}
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