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/*
* rtps.c
*
* Real-Time Publish Subscribe Protocol
*
* Copyright (C) 2023 - ntop.org
* Copyright (C) 2023 - V.G <v.gavrilov@securitycode.ru>
*
* 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_RTPS
#include "ndpi_api.h"
#include "ndpi_private.h"
/* Check https://www.omg.org/spec/DDSI-RTPS/
* for updates
*/
#define RTPS_LAST_MAJOR_VER 2
#define RTPS_LAST_MINOR_VER 5
static void ndpi_search_rtps(struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct const * const packet = &ndpi_struct->packet;
NDPI_LOG_DBG(ndpi_struct, "searching RTPS\n");
if (packet->payload_packet_len >= 16) {
if (((memcmp(packet->payload, "RTPS", 4) == 0) ||
(memcmp(packet->payload, "RTPX", 4) == 0)) &&
((packet->payload[4] == RTPS_LAST_MAJOR_VER) &&
(packet->payload[5] <= RTPS_LAST_MINOR_VER)))
{
NDPI_LOG_INFO(ndpi_struct, "found RTPS\n");
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_RTPS,
NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
return;
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_rtps_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("RTPS", ndpi_struct, *id,
NDPI_PROTOCOL_RTPS,
ndpi_search_rtps,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK
);
*id += 1;
}
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