135 lines
3.3 KiB
C++
135 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 match_spotify_02_req(uint32_t payload, uint32_t len) {
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uint32_t len_field = 0;
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/* Type 0x02 has a 16 bit length field */
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/* The 0x01 is part of the length too... */
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if (!MATCH(payload, 0x00, 0x02, 0x01, ANY))
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return false;
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/* The last byte is the length of the packet - 256 */
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len_field = (ntohl(payload)) & 0xff;
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if (len_field == len - 256)
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return true;
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return false;
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}
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static inline bool match_spotify_04_req(uint32_t payload, uint32_t len) {
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if (!MATCH(payload, 0x00, 0x04, 0x00, 0x00))
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return false;
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return true;
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}
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static inline bool match_spotify_02_resp(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 < 512)
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return false;
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if (!MATCH(payload, 0x00, ANY, ANY, 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_spotify_04_resp(uint32_t payload, uint32_t len) {
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if (len == 0)
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return true;
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if (ntohl(payload) != 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_spotify_port(uint16_t port) {
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if (port == 4070)
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return true;
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if (port == 80)
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return true;
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if (port == 443)
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return true;
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return false;
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}
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static inline bool match_spotify(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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/* Make sure we're using the right port */
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if (!match_spotify_port(data->server_port) &&
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!match_spotify_port(data->client_port)) {
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return false;
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}
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if (match_spotify_02_req(data->payload[0], data->payload_len[0])) {
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if (match_spotify_02_resp(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_spotify_02_req(data->payload[1], data->payload_len[1])) {
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if (match_spotify_02_resp(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_spotify_04_req(data->payload[0], data->payload_len[0])) {
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if (match_spotify_04_resp(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_spotify_04_req(data->payload[1], data->payload_len[1])) {
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if (match_spotify_04_resp(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_spotify = {
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LPI_PROTO_SPOTIFY,
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LPI_CATEGORY_STREAMING,
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"Spotify",
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7,
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match_spotify
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};
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void register_spotify(LPIModuleMap *mod_map) {
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register_protocol(&lpi_spotify, mod_map);
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}
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