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/*
* fasttrack.c
*
* Copyright (C) 2009-2011 by ipoque GmbH
* Copyright (C) 2011-15 - ntop.org
*
* This file is part of nDPI, an open source deep packet inspection
* library based on the OpenDPI and PACE technology by ipoque GmbH
*
* nDPI is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* nDPI is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with nDPI. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "ndpi_protocols.h"
#ifdef NDPI_PROTOCOL_FASTTRACK
static void ndpi_int_fasttrack_add_connection(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_FASTTRACK, NDPI_PROTOCOL_UNKNOWN);
}
void ndpi_search_fasttrack_tcp(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
// struct ndpi_id_struct *src=ndpi_struct->src;
// struct ndpi_id_struct *dst=ndpi_struct->dst;
if (packet->payload_packet_len > 6 && ntohs(get_u_int16_t(packet->payload, packet->payload_packet_len - 2)) == 0x0d0a) {
NDPI_LOG(NDPI_PROTOCOL_FASTTRACK, ndpi_struct, NDPI_LOG_TRACE, "detected 0d0a at the end of the packet.\n");
if (memcmp(packet->payload, "GIVE ", 5) == 0 && packet->payload_packet_len >= 8) {
u_int16_t i;
for (i = 5; i < (packet->payload_packet_len - 2); i++) {
// make shure that the argument to GIVE is numeric
if (!(packet->payload[i] >= '0' && packet->payload[i] <= '9')) {
goto exclude_fasttrack;
}
}
NDPI_LOG(NDPI_PROTOCOL_FASTTRACK, ndpi_struct, NDPI_LOG_TRACE, "FASTTRACK GIVE DETECTED\n");
ndpi_int_fasttrack_add_connection(ndpi_struct, flow);
return;
}
if (packet->payload_packet_len > 50 && memcmp(packet->payload, "GET /", 5) == 0) {
u_int8_t a = 0;
NDPI_LOG(NDPI_PROTOCOL_FASTTRACK, ndpi_struct, NDPI_LOG_TRACE, "detected GET /. \n");
ndpi_parse_packet_line_info(ndpi_struct, flow);
for (a = 0; a < packet->parsed_lines; a++) {
if ((packet->line[a].len > 17 && memcmp(packet->line[a].ptr, "X-Kazaa-Username: ", 18) == 0)
|| (packet->line[a].len > 23 && memcmp(packet->line[a].ptr, "User-Agent: PeerEnabler/", 24) == 0)) {
NDPI_LOG(NDPI_PROTOCOL_FASTTRACK, ndpi_struct, NDPI_LOG_TRACE,
"detected X-Kazaa-Username: || User-Agent: PeerEnabler/\n");
ndpi_int_fasttrack_add_connection(ndpi_struct, flow);
return;
}
}
}
}
exclude_fasttrack:
NDPI_LOG(NDPI_PROTOCOL_FASTTRACK, ndpi_struct, NDPI_LOG_TRACE, "fasttrack/kazaa excluded.\n");
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_FASTTRACK);
}
#endif
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