/*

 * nintendo.c

 *

 * Copyright (C) 2017-18 by 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_NINTENDO

#include "ndpi_api.h"

static void ndpi_int_nintendo_add_connection(struct ndpi_detection_module_struct *ndpi_struct,

               struct ndpi_flow_struct *flow,

               u_int8_t due_to_correlation) {

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

}

static void ndpi_search_nintendo(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {

  struct ndpi_packet_struct *packet = &ndpi_struct->packet;

  u_int32_t payload_len = packet->payload_packet_len;

  if(packet->udp != NULL) {

    if(payload_len > 48) {

      const char *payload = (const char *)packet->payload;

      const char nintendo_pattern[] = { 0x32, 0xab, 0x98, 0x64, 0x02 };

      if(memcmp(payload, nintendo_pattern, 5) == 0) {

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

  ndpi_int_nintendo_add_connection(ndpi_struct, flow, 0);

  return;

      }

    }

  }

  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);

}

void init_nintendo_dissector(struct ndpi_detection_module_struct *ndpi_struct,

           u_int32_t *id) {

  ndpi_set_bitmask_protocol_detection("Nintendo", ndpi_struct, *id,

              NDPI_PROTOCOL_NINTENDO,

              ndpi_search_nintendo,

              NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,

              SAVE_DETECTION_BITMASK_AS_UNKNOWN,

              ADD_TO_DETECTION_BITMASK);

  *id += 1;

}