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/*
* zoom.c
*
* Copyright (C) 2018 by 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_protocol_ids.h"
#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_ZOOM
#include "ndpi_api.h"
static u_int8_t is_zoom_tcp_port(struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
u_int16_t dport = ntohs(packet->tcp->dest);
if((dport == 8801) || (dport == 8802) || (dport == 5090) || (dport == 5091)){
return 1;
}
return 0;
}
static u_int8_t is_zoom_udp_port(struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
u_int16_t dport = ntohs(packet->tcp->dest);
if((dport == 3478) || (dport == 3479) || (dport == 5090) ||
(dport >= 8801 && dport <= 8810) || (dport >= 20000 && dport <= 64000)){
return 1;
}
return 0;
}
static u_int8_t zoom_ptree_match(struct ndpi_detection_module_struct *ndpi_struct, struct in_addr *pin) {
return((ndpi_network_ptree_match(ndpi_struct, pin) == NDPI_PROTOCOL_ZOOM) ? 1 : 0);
}
/* ******************************************* */
static u_int8_t is_zoom_flow(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
if(packet->iph) {
struct in_addr daddr;
daddr.s_addr = packet->iph->daddr;
if(zoom_ptree_match(ndpi_struct, &daddr)) {
return(1);
}
}
return(0);
}
static void ndpi_check_zoom(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow) {
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG_DBG(ndpi_struct, "search Zoom video \n");
if(packet->tcp != NULL)
{
if (is_zoom_flow(ndpi_struct, flow) && is_zoom_tcp_port(flow)){
NDPI_LOG_INFO(ndpi_struct, "found zoom on tcp\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ZOOM,
NDPI_PROTOCOL_UNKNOWN);
return;
}
}
else if(packet->udp != NULL)
{
if (is_zoom_flow(ndpi_struct, flow) && is_zoom_udp_port(flow)){
NDPI_LOG_INFO(ndpi_struct, "found zoom on udp\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_ZOOM,
NDPI_PROTOCOL_UNKNOWN);
return;
}
}
else
{
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
}
void ndpi_search_zoom(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
NDPI_LOG_DBG(ndpi_struct, "search zoom\n");
/* skip marked packets */
if(packet->detected_protocol_stack[0] != NDPI_PROTOCOL_ZOOM)
ndpi_check_zoom(ndpi_struct, flow);
}
void init_zoom_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection("Zoom", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_ZOOM,
ndpi_search_zoom,
NDPI_SELECTION_BITMASK_PROTOCOL_TCP_OR_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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