217 lines
6.7 KiB
C++
217 lines
6.7 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_wow_request(uint32_t payload, uint32_t len) {
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if (!MATCH(payload, 0x00, 0x08, ANY, 0x00))
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return false;
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payload = ntohl(payload);
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/* 3rd and 4th bytes are the size of the packet, minus the four
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* byte header */
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if (htons(payload & 0xffff) == len - 4)
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return true;
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return false;
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}
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static inline bool match_wow_response(uint32_t payload, uint32_t len) {
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if (len == 0)
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return true;
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if (len != 119)
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return false;
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if (!MATCH(payload, 0x00, 0x00, 0x00, ANY))
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return false;
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return true;
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}
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static inline bool match_wow_s2c(uint32_t payload, uint32_t len) {
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/* WoW seems to have changed the server to client protocol recently,
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* possibly with the new expansion Cataclysm */
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if (len == 0)
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return true;
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if (len != 50)
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return false;
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if (MATCH(payload, 0x30, 0x00, 0x57, 0x4f))
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return true;
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return false;
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}
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static inline bool match_wow_2016(uint32_t payload, uint32_t len) {
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if (len == 47 || len == 48 || len == 52) {
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if (MATCHSTR(payload, "WORL"))
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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 inline bool match_china_wow(uint32_t payload, uint32_t len) {
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if (len == 57 || len == 59) {
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if (MATCH(payload, 0x05, 0x01, 0x93, 0x01))
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return true;
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if (MATCH(payload, 0x05, 0x01, 0x99, 0x01))
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return true;
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}
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/* New alternative -- clearly a length field, rest of packet
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* is mostly JSON */
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if (len == 112 && MATCH(payload, 0x00, 0x00, 0x00, 0x6c))
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return true;
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if (len == 113 && MATCH(payload, 0x00, 0x00, 0x00, 0x6d))
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return true;
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if (len == 114 && MATCH(payload, 0x00, 0x00, 0x00, 0x6e))
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return true;
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return false;
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}
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static inline bool match_china_wow512(uint32_t payload, uint32_t len) {
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if (len == 512 && MATCH(payload, 0x00, 0x01, 0x00, 0x25))
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return true;
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return false;
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}
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static inline bool match_china_wow03(uint32_t payload, uint32_t len) {
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uint32_t hdrlen;
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uint32_t swapped;
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if (!MATCH(payload, 0x03, 0x00, ANY, ANY)) {
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return false;
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}
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/* bytes 3 and 4 are a length field, but in little endian */
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hdrlen = ntohl(payload);
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swapped = ((hdrlen & 0xff) << 8) + ((hdrlen & 0xff00) >> 8);
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if (swapped == len) {
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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 inline bool chinese_wow_port(lpi_data_t *data) {
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if (data->server_port >= 8000 && data->server_port <= 8002)
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return true;
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if (data->client_port >= 8000 && data->client_port <= 8002)
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return true;
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if (data->server_port == 443 || data->client_port == 443)
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return true;
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if (data->server_port == 2082 || data->client_port == 2082)
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return true;
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return false;
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}
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static inline bool match_wow(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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if (match_wow_request(data->payload[0], data->payload_len[0])) {
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if (match_wow_response(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_wow_request(data->payload[1], data->payload_len[1])) {
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if (match_wow_response(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_wow_s2c(data->payload[0], data->payload_len[0])) {
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if (match_wow_s2c(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (data->server_port == 3724 || data->client_port == 3724) {
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/* New initial exchange observed in packet traces from 2016 */
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if (match_wow_2016(data->payload[0], data->payload_len[0]) &&
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match_wow_2016(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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}
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/* Chinese WOW is a little different */
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if (chinese_wow_port(data)) {
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if (match_wow_2016(data->payload[0], data->payload_len[0])) {
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if (match_wow_2016(data->payload[1], data->payload_len[1]))
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return true;
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if (match_china_wow(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_wow_2016(data->payload[1], data->payload_len[1])) {
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if (match_china_wow(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_china_wow(data->payload[0], data->payload_len[0])) {
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if (match_china_wow03(data->payload[1], data->payload_len[1]))
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return true;
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if (match_china_wow512(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_china_wow(data->payload[1], data->payload_len[1])) {
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if (match_china_wow03(data->payload[0], data->payload_len[0]))
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return true;
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if (match_china_wow512(data->payload[0], data->payload_len[0]))
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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_wow = {
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LPI_PROTO_WOW,
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LPI_CATEGORY_GAMING,
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"WorldOfWarcraft",
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4, /* Not super-strong, especially for one-way */
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match_wow
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};
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void register_wow(LPIModuleMap *mod_map) {
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register_protocol(&lpi_wow, mod_map);
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}
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