/*

 * xbox.c

 *

 * Copyright (C) 2016-22 - 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_XBOX

#include "ndpi_api.h"

#include "ndpi_private.h"

static void ndpi_int_xbox_add_connection(struct ndpi_detection_module_struct

           *ndpi_struct, struct ndpi_flow_struct *flow)

{

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

}

static void ndpi_search_xbox(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow)

{

  struct ndpi_packet_struct *packet = &ndpi_struct->packet;

  /*

   * XBOX UDP DETCTION ONLY

   * this detection also works for asymmetric xbox udp traffic

   */

  if(packet->udp != NULL) {

    u_int16_t dport = ntohs(packet->udp->dest);

    u_int16_t sport = ntohs(packet->udp->source);

    NDPI_LOG_DBG(ndpi_struct, "search xbox\n");

    if (packet->payload_packet_len > 12 &&

  get_u_int32_t(packet->payload, 0) == 0 && packet->payload[5] == 0x58 &&

  memcmp(&packet->payload[7], "\x00\x00\x00", 3) == 0) {

      if ((packet->payload[4] == 0x0c && packet->payload[6] == 0x76) ||

    (packet->payload[4] == 0x02 && packet->payload[6] == 0x18) ||

    (packet->payload[4] == 0x0b && packet->payload[6] == 0x80) ||

    (packet->payload[4] == 0x03 && packet->payload[6] == 0x40) ||

    (packet->payload[4] == 0x06 && packet->payload[6] == 0x4e)) {

  ndpi_int_xbox_add_connection(ndpi_struct, flow);

  NDPI_LOG_INFO(ndpi_struct, "found xbox udp connection detected\n");

  return;

      }

    }

    if ((dport == 3074 || sport == 3074)

  && ((packet->payload_packet_len == 24 && packet->payload[0] == 0x00)

      || (packet->payload_packet_len == 42 && packet->payload[0] == 0x4f && packet->payload[2] == 0x0a)

      || (packet->payload_packet_len == 80 && ntohs(get_u_int16_t(packet->payload, 0)) == 0x50bc

    && packet->payload[2] == 0x45)

      || (packet->payload_packet_len == 40 && ntohl(get_u_int32_t(packet->payload, 0)) == 0xcf5f3202)

      || (packet->payload_packet_len == 38 && ntohl(get_u_int32_t(packet->payload, 0)) == 0xc1457f03)

      || (packet->payload_packet_len == 28 && ntohl(get_u_int32_t(packet->payload, 0)) == 0x015f2c00))) {

      if (flow->l4.udp.xbox_stage == 1) {

  ndpi_int_xbox_add_connection(ndpi_struct, flow);

  NDPI_LOG_INFO(ndpi_struct, "found xbox udp connection detected\n");

  return;

      }

      NDPI_LOG_DBG(ndpi_struct, "maybe xbox\n");

      flow->l4.udp.xbox_stage++;

      return;

    }

/* Disable this code. These checks are quite weak and these ports are not mentioned at

   https://support.xbox.com/en-US/help/hardware-network/connect-network/network-ports-used-xbox-live */

#if 0

    else if ((dport == 3075 || dport == 3076 || dport == 3077 || dport == 3078) ||

          (sport == 3075 || sport == 3076 || sport == 3077 || sport == 3078)) {

  ndpi_int_xbox_add_connection(ndpi_struct, flow);

  NDPI_LOG_INFO(ndpi_struct, "found xbox udp port connection detected\n");

  return;

    }

#endif

  }

  if(flow->packet_counter >= 5)

    NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);

}

void init_xbox_dissector(struct ndpi_detection_module_struct *ndpi_struct)

{

  register_dissector("Xbox", ndpi_struct,

                     ndpi_search_xbox,

                     NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,

                     1, NDPI_PROTOCOL_XBOX);

}