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/*
* ssdp.c
*
* Copyright (C) 2009-11 - ipoque GmbH
* Copyright (C) 2011-22 - 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_SSDP
#include "ndpi_api.h"
#include "ndpi_private.h"
static void ssdp_parse_lines(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &ndpi_struct->packet;
ndpi_parse_packet_line_info(ndpi_struct, flow);
/* Save user-agent for device discovery if available */
if(packet->user_agent_line.ptr != NULL && packet->user_agent_line.len > 0) {
if (ndpi_user_agent_set(flow, packet->user_agent_line.ptr, packet->user_agent_line.len) == NULL)
{
NDPI_LOG_DBG2(ndpi_struct, "Could not set SSDP user agent\n");
}
}
/* Save host which provides a service if available */
if (packet->host_line.ptr != NULL && packet->host_line.len > 0) {
ndpi_hostname_sni_set(flow, packet->host_line.ptr, packet->host_line.len, NDPI_HOSTNAME_NORM_ALL);
}
}
static void ndpi_int_ssdp_add_connection(struct ndpi_detection_module_struct
*ndpi_struct, struct ndpi_flow_struct *flow)
{
ssdp_parse_lines(ndpi_struct, flow);
ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_SSDP, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);
}
/* this detection also works asymmetrically */
static void ndpi_search_ssdp(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 ssdp\n");
if (packet->udp != NULL) {
if (packet->payload_packet_len >= 19) {
if ((memcmp(packet->payload, "M-SEARCH * HTTP/1.1", 19) == 0)
|| memcmp(packet->payload, "NOTIFY * HTTP/1.1", 17) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found ssdp\n");
ndpi_int_ssdp_add_connection(ndpi_struct, flow);
return;
}
#define SSDP_HTTP "HTTP/1.1 200 OK\r\n"
if(memcmp(packet->payload, SSDP_HTTP, strlen(SSDP_HTTP)) == 0) {
NDPI_LOG_INFO(ndpi_struct, "found ssdp\n");
ndpi_int_ssdp_add_connection(ndpi_struct, flow);
return;
}
}
}
NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}
void init_ssdp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)
{
ndpi_set_bitmask_protocol_detection("SSDP", ndpi_struct, *id,
NDPI_PROTOCOL_SSDP,
ndpi_search_ssdp,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN,
ADD_TO_DETECTION_BITMASK);
*id += 1;
}
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