247 lines
6.9 KiB
C++
247 lines
6.9 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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#include <stdio.h>
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static inline bool ppstream_pattern(uint32_t payload) {
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if (MATCH(payload, ANY, ANY, 0x43, 0x00))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x22))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x23))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x32))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x46))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x47))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x49))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x4c))
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return true;
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if (MATCH(payload, ANY, ANY, 0x43, 0x4d))
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return true;
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if (MATCH(payload, ANY, ANY, 0x44, 0x73))
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return true;
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if (MATCH(payload, ANY, ANY, 0x44, 0xb2))
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return true;
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if (MATCH(payload, ANY, ANY, 0x44, 0xb5))
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return true;
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if (MATCH(payload, ANY, ANY, 0x55, 0x72))
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return true;
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if (MATCH(payload, ANY, ANY, 0x55, 0x75))
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return true;
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if (MATCH(payload, ANY, ANY, 0x55, 0xb3))
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return true;
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return false;
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}
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static inline bool match_ppstream_payload(uint32_t payload, uint32_t len) {
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uint16_t rep_len = 0;
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uint32_t swap = ntohl(payload);
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if (len == 0)
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return true;
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/* Seems to be used on start-up to check access to certain
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* servers owned by PPStream */
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if (MATCH(payload, 'e', 'c', 'h', 'o') && len == 5)
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return true;
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if (!ppstream_pattern(payload))
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return false;
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/* First two bytes are either len or len - 4 */
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rep_len = ntohs((uint16_t)(swap >> 16));
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if (rep_len == len)
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return true;
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if (rep_len == 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_8480_ppstream(uint32_t payload, uint32_t len) {
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if (len == 132 && MATCH(payload, 0x84, 0x80, 0xc0, 0xd1))
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return true;
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if (len == 132 && MATCH(payload, 0x84, 0x80, 0xd1, 0xc0))
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return true;
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return false;
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}
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static inline bool match_8580_ppstream(uint32_t payload, uint32_t len) {
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if (len == 133 && MATCH(payload, 0x85, 0x80, 0xc1, 0xd0))
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return true;
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return false;
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}
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static inline bool match_1580_ppstream(uint32_t payload, uint32_t len) {
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if (len == 24 && MATCH(payload, 0x15, 0x80, 0x40, 0x01))
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return true;
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return false;
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}
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static inline bool match_8580_reply(uint32_t payload, uint32_t len) {
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if (len < 134 || len > 151) {
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return false;
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}
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if (MATCH(payload, ANY, 0x80, ANY, ANY)) {
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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_80_ppstream(uint32_t payload, uint32_t len) {
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uint32_t hlen = ntohl(payload) >> 24;
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if (MATCH(payload, ANY, 0x80, ANY, ANY)) {
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if (len == hlen )
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return true;
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/* There must be a minimum datagram size */
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if (len == 24 && hlen < 24)
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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_any84(uint32_t payload, uint32_t len) {
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if (MATCH(payload, ANY, 0x84, ANY, ANY)) {
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if (len >= 1065 && len <= 1100)
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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_any80(uint32_t payload, uint32_t len) {
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/* Only examples so far are 0x25806144, len=33 -- need to
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* see more users to confirm if this is a constant payload */
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if (MATCH(payload, ANY, 0x80, ANY, ANY)) {
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if (len == 33)
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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_ppstream(lpi_data_t *data, lpi_module_t *mod UNUSED) {
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if (match_ppstream_payload(data->payload[0], data->payload_len[0])) {
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if (match_ppstream_payload(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_8480_ppstream(data->payload[0], data->payload_len[0])) {
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if (MATCH(data->payload[1], ANY, 0x80, ANY, ANY))
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return true;
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}
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if (match_8480_ppstream(data->payload[1], data->payload_len[1])) {
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if (MATCH(data->payload[0], ANY, 0x80, ANY, ANY))
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return true;
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}
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if (match_80_ppstream(data->payload[0], data->payload_len[0])) {
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if (match_80_ppstream(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_any84(data->payload[0], data->payload_len[0])) {
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if (match_any80(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_any80(data->payload[0], data->payload_len[0])) {
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if (match_any84(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_8580_ppstream(data->payload[0], data->payload_len[0])) {
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if (match_8580_reply(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_8580_ppstream(data->payload[1], data->payload_len[1])) {
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if (match_8580_reply(data->payload[0], data->payload_len[0]))
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return true;
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}
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if (match_1580_ppstream(data->payload[0], data->payload_len[0])) {
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/* 8580 reply is intention here -- it's the same reply
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* pattern for both 1580 and 8580 */
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if (match_8580_reply(data->payload[1], data->payload_len[1]))
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return true;
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}
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if (match_1580_ppstream(data->payload[1], data->payload_len[1])) {
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if (match_8580_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_ppstream = {
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LPI_PROTO_UDP_PPSTREAM,
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LPI_CATEGORY_P2PTV,
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"PPStream",
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150,
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match_ppstream
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};
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void register_ppstream(LPIModuleMap *mod_map) {
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register_protocol(&lpi_ppstream, mod_map);
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}
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