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/*
* coap.c
*
* Copyright (C) 2016 Sorin Zamfir <sorin.zamfir@yahoo.com>
*
* 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_COAP
static void
ndpi_int_coap_add_connection (struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
// not sure if this is accurate but coap runs on top of udp and should be connectionless
if (flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN)
{
/* This is COAP and it is not a sub protocol (e.g. lwm2m) */
ndpi_search_tcp_or_udp (ndpi_struct, flow);
//
// /* If no custom protocol has been detected */
if (flow->detected_protocol_stack[0] == NDPI_PROTOCOL_UNKNOWN)
{
// if(protocol != NDPI_PROTOCOL_HTTP) {
// ndpi_search_tcp_or_udp(ndpi_struct, flow);
// ndpi_set_detected_protocol(ndpi_struct, flow, protocol, NDPI_PROTOCOL_UNKNOWN);
// } else {
// ndpi_int_reset_protocol(flow);
// ndpi_set_detected_protocol(ndpi_struct, flow, protocol, NDPI_PROTOCOL_UNKNOWN);
// }
// }
//
// flow->http_detected = 1;
}
}
}
//static u_int16_t coap_request_url_offset(struct ndpi_detection_module_struct * ndpi_struct,
// struct ndpi_flow_struct *flow)
//{
// struct ndpi_packet_struct* packet = &flow->packet;
// if (packet->payload_packet_len >=4 )
//}
void ndpi_search_coap (struct ndpi_detection_module_struct *ndpi_struct,
struct ndpi_flow_struct *flow)
{
struct ndpi_packet_struct *packet = &flow->packet;
if (packet->detected_protocol_stack[0] != NDPI_PROTOCOL_UNKNOWN)
{
return;
}
NDPI_LOG(NDPI_PROTOCOL_COAP, ndpi_struct, NDPI_LOG_DEBUG, "CoAP detection...\n");
if (flow->l4.udp.coap_stage == 0) {
// we must set something here
NDPI_LOG(NDPI_PROTOCOL_COAP, ndpi_struct, NDPI_LOG_DEBUG, "====>>>> COAP: %c%c%c%c [len: %u]\n",
packet->payload[0], packet->payload[1], packet->payload[2], packet->payload[3],
packet->payload_packet_len);
} else if (flow->l4.udp.coap_stage == 1 + packet->packet_direction )
{
}
// packet->
}
void init_coap_dissector (struct ndpi_detection_module_struct *ndpi_struct,
u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
ndpi_set_bitmask_protocol_detection ("COAP", ndpi_struct, detection_bitmask, *id,
NDPI_PROTOCOL_COAP,
ndpi_search_coap,
NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,
SAVE_DETECTION_BITMASK_AS_UNKNOWN, ADD_TO_DETECTION_BITMASK);
*id +=1;
}
#endif // NDPI_PROTOCOL_COAP
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