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/*
* teamviewer.c
*
* Copyright (C) 2012 by Gianluca Costa xplico.org
* Copyright (C) 2012-15 - 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_TEAMVIEWER
static void ndpi_int_teamview_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_TEAMVIEWER);
NDPI_LOG(NDPI_PROTOCOL_TEAMVIEWER, ndpi_struct, NDPI_LOG_TRACE, "TEAMWIEWER Found.\n");
}
void ndpi_search_teamview(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG(NDPI_PROTOCOL_TEAMVIEWER, ndpi_struct, NDPI_LOG_TRACE, "TEAMWIEWER detection...\n");
/*
TeamViewer
178.77.120.0/25
http://myip.ms/view/ip_owners/144885/Teamviewer_Gmbh.html
*/
if(flow->packet.iph) {
u_int32_t src = ntohl(flow->packet.iph->saddr);
u_int32_t dst = ntohl(flow->packet.iph->daddr);
/* 95.211.37.195 - 95.211.37.203 */
if(((src >= 1607673283) && (src <= 1607673291))
|| ((dst >= 1607673283) && (dst <= 1607673291))
|| ((src & 0xFFFFFF80 /* 255.255.255.128 */) == 0xB24D7800 /* 178.77.120.0 */)
|| ((dst & 0xFFFFFF80 /* 255.255.255.128 */) == 0xB24D7800 /* 178.77.120.0 */)
) {
ndpi_int_teamview_add_connection(ndpi_struct, flow);
return;
}
}
if(packet->payload_packet_len == 0) return;
if (packet->udp != NULL) {
if (packet->payload_packet_len > 13) {
if (packet->payload[0] == 0x00 && packet->payload[11] == 0x17 && packet->payload[12] == 0x24) { /* byte 0 is a counter/seq number, and at the start is 0 */
flow->l4.udp.teamviewer_stage++;
if (flow->l4.udp.teamviewer_stage == 4 ||
packet->udp->dest == ntohs(5938) || packet->udp->source == ntohs(5938)) {
ndpi_int_teamview_add_connection(ndpi_struct, flow);
}
return;
}
}
}
else if(packet->tcp != NULL) {
if (packet->payload_packet_len > 2) {
if (packet->payload[0] == 0x17 && packet->payload[1] == 0x24) {
flow->l4.udp.teamviewer_stage++;
if (flow->l4.udp.teamviewer_stage == 4 ||
packet->tcp->dest == ntohs(5938) || packet->tcp->source == ntohs(5938)) {
ndpi_int_teamview_add_connection(ndpi_struct, flow);
}
return;
}
else if (flow->l4.udp.teamviewer_stage) {
if (packet->payload[0] == 0x11 && packet->payload[1] == 0x30) {
flow->l4.udp.teamviewer_stage++;
if (flow->l4.udp.teamviewer_stage == 4)
ndpi_int_teamview_add_connection(ndpi_struct, flow);
}
return;
}
}
}
NDPI_ADD_PROTOCOL_TO_BITMASK(flow->excluded_protocol_bitmask, NDPI_PROTOCOL_TEAMVIEWER);
}
#endif
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