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/*
* winmx.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_WINMX
static void ndpi_int_winmx_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow);
static void ndpi_int_winmx_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_int_add_connection(ndpi_struct, flow, NDPI_PROTOCOL_WINMX/* , NDPI_REAL_PROTOCOL */);
}
void ndpi_search_winmx_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 (flow->l4.tcp.winmx_stage == 0) {
if (packet->payload_packet_len == 1 || (packet->payload_packet_len > 1 && packet->payload[0] == 0x31)) {
return;
}
/* did not see this pattern in any trace that we have */
if (((packet->payload_packet_len) == 4)
&& (memcmp(packet->payload, "SEND", 4) == 0)) {
NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "maybe WinMX Send\n");
flow->l4.tcp.winmx_stage = 1;
return;
}
if (((packet->payload_packet_len) == 3)
&& (memcmp(packet->payload, "GET", 3) == 0)) {
NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "found winmx by GET\n");
ndpi_int_winmx_add_connection(ndpi_struct, flow);
return;
}
if (packet->payload_packet_len == 149 && packet->payload[0] == '8') {
NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "maybe WinMX\n");
if (get_u_int32_t(packet->payload, 17) == 0
&& get_u_int32_t(packet->payload, 21) == 0
&& get_u_int32_t(packet->payload, 25) == 0
&& get_u_int16_t(packet->payload, 39) == 0 && get_u_int16_t(packet->payload, 135) == htons(0x7edf)
&& get_u_int16_t(packet->payload, 147) == htons(0xf792)) {
NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG,
"found winmx by pattern in first packet\n");
ndpi_int_winmx_add_connection(ndpi_struct, flow);
return;
}
}
/* did not see this pattern in any trace that we have */
} else if (flow->l4.tcp.winmx_stage == 1) {
if (packet->payload_packet_len > 10 && packet->payload_packet_len < 1000) {
u_int16_t left = packet->payload_packet_len - 1;
while (left > 0) {
if (packet->payload[left] == ' ') {
NDPI_LOG(NDPI_PROTOCOL_WINMX, ndpi_struct, NDPI_LOG_DEBUG, "found winmx in second packet\n");
ndpi_int_winmx_add_connection(ndpi_struct, flow);
return;
} else if (packet->payload[left] < '0' || packet->payload[left] > '9') {
break;
}
left--;
}
}
}
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_WINMX);
}
#endif
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