115 lines
3.3 KiB
C++
115 lines
3.3 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 obs_pplive_req(uint32_t payload, uint32_t len) {
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/* There's always a 94 byte packet involved */
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if (payload == 0)
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return false;
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if (len == 94)
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return true;
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return false;
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}
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static inline bool obs_pplive_resp(uint32_t len, bool knownport) {
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if (len == 0 && knownport)
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return true;
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if (len == 94)
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return true;
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if (len == 49 && knownport)
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return true;
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return false;
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}
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static inline bool match_obscure_pplive(lpi_data_t *data) {
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/* This is pretty tough stuff to match - the 4 bytes of payload
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* is random, but the packet sizes seem consistent.
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*
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* DPI tools suggest this traffic is pplive, so we'll go with that
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* in the absence of any other documentation :/
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*/
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bool knownport = false;
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/* Restrict non-94 byte responses to port 5041 */
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if (data->server_port == 5041 || data->client_port == 5041)
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knownport = true;
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if (obs_pplive_req(data->payload[0], data->payload_len[0]) &&
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obs_pplive_resp(data->payload_len[1], knownport))
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return true;
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if (obs_pplive_req(data->payload[1], data->payload_len[1]) &&
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obs_pplive_resp(data->payload_len[0], knownport))
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return true;
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return false;
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}
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static inline bool match_pplive(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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if (match_str_both(data, "\xe9\x03\x41\x01", "\xe9\x03\x42\x01"))
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return true;
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if (match_str_both(data, "\xe9\x03\x41\x01", "\xe9\x03\x41\x01"))
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return true;
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if (match_str_either(data, "\xe9\x03\x41\x01")) {
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if (data->payload_len[0] == 0 && data->payload_len[1] == 57)
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return true;
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if (data->payload_len[1] == 0 && data->payload_len[0] == 57)
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return true;
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}
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/* According to a Chinese paper (Xiaona et al), this is a pattern
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* for PPLive */
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if (match_str_both(data, "\x1c\x1c\x32\x01", "\x1c\x1c\x32\x01"))
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return true;
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if (match_obscure_pplive(data)) {
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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_pplive = {
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LPI_PROTO_UDP_PPLIVE,
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LPI_CATEGORY_P2PTV,
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"PPLive",
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203,
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match_pplive
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};
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void register_pplive(LPIModuleMap *mod_map) {
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register_protocol(&lpi_pplive, mod_map);
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}
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