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/*
* rtsp.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* Copyright (C) 2011-25 - 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_RTSP
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ndpi_int_rtsp_add_connection(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
NDPI_LOG_INFO(ndpi_struct, "found RTSP\n");
ndpi_set_detected_protocol_keeping_master(ndpi_struct, flow, NDPI_PROTOCOL_RTSP,
NDPI_CONFIDENCE_DPI);
}
/* this function searches for a rtsp-"handshake" over tcp or udp. */
static void ndpi_search_rtsp_tcp_udp(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "search RTSP\n");
if (packet->parsed_lines == 0)
{
ndpi_parse_packet_line_info(ndpi_struct, flow);
}
if (packet->parsed_lines > 0 &&
(LINE_ENDS(packet->line[0], "RTSP/1.0") != 0 ||
LINE_STARTS(packet->line[0], "RTSP/1.0") != 0 || /* Response */
LINE_ENDS(packet->accept_line, "application/x-rtsp-tunnelled") != 0 ||
LINE_ENDS(packet->content_line, "application/x-rtsp-tunnelled") != 0
/* Should we also check for "rtsp://" in the packet? */))
{
ndpi_int_rtsp_add_connection(ndpi_struct, flow);
/* Extract some metadata HTTP-like */
if(packet->user_agent_line.ptr != NULL)
ndpi_user_agent_set(flow, packet->user_agent_line.ptr, packet->user_agent_line.len);
return;
}
NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);
}
void init_rtsp_dissector(struct ndpi_detection_module_struct *ndpi_struct)
{
register_dissector("RTSP", ndpi_struct,
ndpi_search_rtsp_tcp_udp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,
1, NDPI_PROTOCOL_RTSP);
}
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