/*

 * steam.c

 *

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

 * Copyright (C) 2014 Tomasz Bujlow <tomasz@skatnet.dk>

 *

 * 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_STEAM

#include "ndpi_api.h"

#include "ndpi_private.h"

static void ndpi_search_steam(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, "search Steam\n");

  /* Steam In-Home Streaming Discovery */

  if (packet->payload_packet_len >= 40)

  {

    if (le64toh(get_u_int64_t(packet->payload, 0)) == 0xA05F4C21FFFFFFFF)

    {

      NDPI_LOG_INFO(ndpi_struct, "found Steam In-Home Streaming Discovery\n");

      ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_STEAM,

                                 NDPI_PROTOCOL_UNKNOWN, NDPI_CONFIDENCE_DPI);

      return;

    }

  }

  /* TODO: implement Steam Remote Play detection */

  NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);

}

void init_steam_dissector(struct ndpi_detection_module_struct *ndpi_struct)

{

  register_dissector("Steam", ndpi_struct,

                     ndpi_search_steam,

                     NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,

                     1, NDPI_PROTOCOL_STEAM);

}