/*

 * nest_log_sink.c

 *

 * Copyright (C) 2009-11 - ipoque GmbH

 * Copyright (C) 2011-25 - ntop.org

 * Copyright (C) 2018 - eGloo Incorporated

 *

 * 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_NEST_LOG_SINK

#include "ndpi_api.h"

#include "ndpi_private.h"

#define NEST_LOG_SINK_PORT          11095

#define NEST_LOG_SINK_MIN_LEN       8

#define NEST_LOG_SINK_MIN_MATCH     3

static void ndpi_search_nest_log_sink(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 nest_log_sink\n");

    if (packet->payload_packet_len < NEST_LOG_SINK_MIN_LEN) {

        NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);

        return;

    }

    if (ntohs(packet->tcp->source) != NEST_LOG_SINK_PORT &&

            ntohs(packet->tcp->dest) != NEST_LOG_SINK_PORT) {

        NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);

        return;

    }

    if (packet->payload[1] <= 0x02 &&

            (packet->payload[2] == 0x00 || packet->payload[2] == 0x10) &&

            packet->payload[3] == 0x13)

        flow->l4.tcp.nest_log_sink_matches++;

    if (flow->l4.tcp.nest_log_sink_matches == NEST_LOG_SINK_MIN_MATCH) {

        NDPI_LOG_INFO(ndpi_struct, "found nest_log_sink\n");

        ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_NEST_LOG_SINK, NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);

    }

}

void init_nest_log_sink_dissector(struct ndpi_detection_module_struct *ndpi_struct)

{

  register_dissector("NEST_LOG_SINK", ndpi_struct,

                     ndpi_search_nest_log_sink,

                     NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,

                     1, NDPI_PROTOCOL_NEST_LOG_SINK);

}