/*
 * 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);
}

void ndpi_search_nintendo(struct ndpi_detection_module_struct *ndpi_struct, struct ndpi_flow_struct *flow) {
    struct ndpi_packet_struct *packet = &flow->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_PROTOCOL_BITMASK *detection_bitmask) {
    ndpi_set_bitmask_protocol_detection("Nintendo", ndpi_struct, detection_bitmask, *id,
            NDPI_PROTOCOL_NINTENDO,
            ndpi_search_nintendo,
            NDPI_SELECTION_BITMASK_PROTOCOL_UDP_WITH_PAYLOAD,
            SAVE_DETECTION_BITMASK_AS_UNKNOWN,
            ADD_TO_DETECTION_BITMASK);
    *id += 1;
}

