110 lines
3.0 KiB
C++
110 lines
3.0 KiB
C++
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/*
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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_arma_server_payload(uint32_t payload, uint32_t len) {
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uint32_t replen;
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if (len == 0)
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return true;
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if (!MATCH(payload, ANY, ANY, 0x01, 0x08))
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return false;
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replen = (payload & 0xffff);
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if (replen != len)
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return false;
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return true;
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}
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static inline bool match_arma_nine(uint32_t payload, uint32_t len) {
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/* The HalfLife protocol and its derivatives all use a similar
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* type of packet -- probably a server ping probe?
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* This is probably copied or heavily influenced by that.
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*/
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if (len != 9)
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return false;
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if (MATCHSTR(payload, "\xff\xff\xff\xff"))
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return true;
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return false;
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}
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static inline bool match_arma_port_range(lpi_data_t *data) {
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if (data->server_port >= 2300 && data->server_port <= 2400)
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return true;
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if (data->client_port >= 2300 && data->client_port <= 2400)
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return true;
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return false;
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}
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static inline bool match_arma_server(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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if (match_arma_server_payload(data->payload[0], data->payload_len[0])) {
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if (match_arma_server_payload(data->payload[1], data->payload_len[1]))
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return true;
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}
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/* The next rule is prone to conflicts so restrict to flows that
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* are using common ARMA ports */
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if (!match_arma_port_range(data))
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return false;
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if (match_arma_nine(data->payload[0], data->payload_len[0])) {
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if (match_arma_nine(data->payload[1], data->payload_len[1])) {
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return true;
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}
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}
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return false;
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}
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static lpi_module_t lpi_arma_server = {
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LPI_PROTO_UDP_ARMA_SERVER,
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LPI_CATEGORY_GAMING,
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"ARMA2Server",
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4,
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match_arma_server
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};
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void register_arma_server(LPIModuleMap *mod_map) {
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register_protocol(&lpi_arma_server, mod_map);
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}
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