/*

 * teamspeak.c 

 *

 * Copyright (C) 2013 Remy Mudingay <mudingay@ill.fr>

 *

 * This module 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.

 * 

 * This module 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.

 * If not, see <http://www.gnu.org/licenses/>.

 */

#include "ndpi_protocol_ids.h"

#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_TEAMSPEAK

#include "ndpi_api.h"

#include "ndpi_private.h"

static void ndpi_int_teamspeak_add_connection(struct ndpi_detection_module_struct

                                              *ndpi_struct, struct ndpi_flow_struct *flow)

{

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

}

static void ndpi_search_teamspeak(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 teamspeak\n");

  if (packet->payload_packet_len >= 20) {

    if (packet->udp != NULL) {

      if (memcmp(packet->payload, "TS3INIT1", strlen("TS3INIT1")) == 0)

      {

        NDPI_LOG_INFO(ndpi_struct, "found TEAMSPEAK udp\n");

        ndpi_int_teamspeak_add_connection(ndpi_struct, flow);

        return;

      }

    } else if(packet->tcp != NULL) {

      /* https://github.com/Youx/soliloque-server/wiki/Connection-packet */

      if(((memcmp(packet->payload, "\xf4\xbe\x03\x00", 4) == 0)) ||

         ((memcmp(packet->payload, "\xf4\xbe\x02\x00", 4) == 0)) ||

         ((memcmp(packet->payload, "\xf4\xbe\x01\x00", 4) == 0)))

      {

        NDPI_LOG_INFO(ndpi_struct, "found TEAMSPEAK tcp\n");

        ndpi_int_teamspeak_add_connection(ndpi_struct, flow);

        return;

      }  /* http://www.imfirewall.com/en/protocols/teamSpeak.htm  */

    }

  }

  if (packet->udp != NULL)

  {

    if (packet->payload_packet_len == 16 &&

        packet->payload[0] == 0x01 && packet->payload[3] == 0x02 &&

        get_u_int32_t(packet->payload, 11) == 0x00000000 && packet->payload[15] == 0x00)

    {

      goto ts3_license_weblist;

    }

    if ((packet->payload_packet_len == 4 || packet->payload_packet_len == 8) &&

        packet->payload[0] == 0x01 && packet->payload[3] == 0x01)

    {

      goto ts3_license_weblist;

    }

    if (packet->payload_packet_len == 5 &&

        packet->payload[0] == 0x01 && packet->payload[3] == 0x02 &&

        packet->payload[4] == 0x00)

    {

      goto ts3_license_weblist;

    }

  }

  NDPI_EXCLUDE_DISSECTOR(ndpi_struct, flow);

  return;

ts3_license_weblist:

  if (flow->packet_counter == 3)

  {

    NDPI_LOG_INFO(ndpi_struct, "found TEAMSPEAK license/weblist\n");

    ndpi_int_teamspeak_add_connection(ndpi_struct, flow);

    return;

  }

}

void init_teamspeak_dissector(struct ndpi_detection_module_struct *ndpi_struct)

{

  ndpi_register_dissector("TeamSpeak", ndpi_struct,

                     ndpi_search_teamspeak,

                     NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_TCP_OR_UDP_WITH_PAYLOAD_WITHOUT_RETRANSMISSION,

                     1, NDPI_PROTOCOL_TEAMSPEAK);

}