/*
 * noe.c (Alcatel new office environment)
 *
 * Copyright (C) 2013 Remy Mudingay <mudingay@ill.fr>
 *
 */

#include "ndpi_protocol_ids.h"

#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_NOE

#include "ndpi_api.h"

static void ndpi_int_noe_add_connection(struct ndpi_detection_module_struct
        *ndpi_struct, struct ndpi_flow_struct *flow)
{
    NDPI_LOG_INFO(ndpi_struct, "found noe\n");
    ndpi_set_detected_protocol(ndpi_struct, flow, NDPI_PROTOCOL_NOE);
}

void ndpi_search_noe(struct ndpi_detection_module_struct *ndpi_struct,
        struct ndpi_flow_struct *flow)
{
    struct ndpi_packet_struct *packet = &flow->packet;

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

    if(packet->udp != NULL) {
        NDPI_LOG_DBG2(ndpi_struct, "calculating dport over udp\n");

        if (packet->payload_packet_len == 1 && ( packet->payload[0] == 0x05 || packet->payload[0] == 0x04 )) {
            ndpi_int_noe_add_connection(ndpi_struct, flow);
            return;
        } else if((packet->payload_packet_len == 5 || packet->payload_packet_len == 12) &&
                (packet->payload[0] == 0x07 ) &&
                (packet->payload[1] == 0x00 ) &&
                (packet->payload[2] != 0x00 ) &&
                (packet->payload[3] == 0x00 )) {
            ndpi_int_noe_add_connection(ndpi_struct, flow);
            return;
        } else if((packet->payload_packet_len >= 25) &&
                (packet->payload[0] == 0x00 &&
                 packet->payload[1] == 0x06 &&
                 packet->payload[2] == 0x62 &&
                 packet->payload[3] == 0x6c)) {
            ndpi_int_noe_add_connection(ndpi_struct, flow);
            return;
        }
    } else {
        NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
    }
}


void init_noe_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
    ndpi_set_bitmask_protocol_detection("NOE", ndpi_struct, detection_bitmask, *id,
            NDPI_PROTOCOL_NOE,
            ndpi_search_noe,
            NDPI_SELECTION_BITMASK_PROTOCOL_TCP_OR_UDP_WITH_PAYLOAD,
            SAVE_DETECTION_BITMASK_AS_UNKNOWN,
            ADD_TO_DETECTION_BITMASK);

    *id += 1;
}

