102 lines
2.7 KiB
C++
102 lines
2.7 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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/* This protocol is something I observed on a laptop running a Steam client.
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* It just constantly spams 255.255.255.255 with these packets and I found
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* some references to Steam when trying to find out what it was, e.g.
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* http://ask.wireshark.org/questions/11566/possible-malware-on-network
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*
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*/
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static inline bool match_steam_ports(uint16_t port_a, uint16_t port_b) {
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if (port_a == 10007 || port_b == 10007)
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return true;
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if (port_a == 10019 || port_b == 10019)
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return true;
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return false;
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}
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static inline bool match_steam_request(uint32_t payload, uint32_t len) {
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if (len != 128)
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return false;
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if (MATCHSTR(payload, "\x00\xff\x00\x00"))
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return true;
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if (MATCHSTR(payload, "\xf0\xff\x00\x00"))
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return true;
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return false;
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}
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static inline bool match_steam_reply(uint32_t payload, uint32_t len) {
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/* Not seen a valid reply yet, so just check for no reply */
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if (len == 0)
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return true;
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return false;
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}
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static inline bool match_steam_localbroadcast(lpi_data_t *data,
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lpi_module_t *mod UNUSED) {
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if (!match_steam_ports(data->server_port, data->client_port)) {
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return false;
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}
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if (match_steam_request(data->payload[0], data->payload_len[0])) {
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if (match_steam_reply(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_steam_request(data->payload[1], data->payload_len[1])) {
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if (match_steam_reply(data->payload[0], data->payload_len[0]))
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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_steam_localbroadcast = {
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LPI_PROTO_UDP_STEAM_LOCALBROADCAST,
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LPI_CATEGORY_BROADCAST,
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"SteamLocalBroadcast",
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16,
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match_steam_localbroadcast
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};
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void register_steam_localbroadcast(LPIModuleMap *mod_map) {
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register_protocol(&lpi_steam_localbroadcast, mod_map);
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}
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