#include "ndpi_protocol_ids.h"

#define NDPI_CURRENT_PROTO NDPI_PROTOCOL_BJNP

#include "ndpi_api.h"

static void ndpi_int_bjnp_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_BJNP);
}


static void ndpi_check_bjnp(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 > 4) {
            if((memcmp((const char *)packet->payload, "BJNP", 4) == 0)
                    || (memcmp((const char *)packet->payload, "BNJB", 4) == 0)
                    || (memcmp((const char *)packet->payload, "BJNB", 4) == 0)
                    || (memcmp((const char *)packet->payload, "MFNP", 4) == 0)
              ) {
                NDPI_LOG_INFO(ndpi_struct, "found bjnp\n");
                ndpi_int_bjnp_add_connection(ndpi_struct, flow, 0);
                return;
            }
        }
    }

    NDPI_EXCLUDE_PROTO(ndpi_struct, flow);
}

void ndpi_search_bjnp(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 bjnp\n");

    /* skip marked packets */
    if (packet->detected_protocol != NDPI_PROTOCOL_BJNP) {
        if (packet->tcp_retransmission == 0) {
            ndpi_check_bjnp(ndpi_struct, flow);
        }
    }
}


void init_bjnp_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id, NDPI_PROTOCOL_BITMASK *detection_bitmask)
{
    ndpi_set_bitmask_protocol_detection("BJNP", ndpi_struct, detection_bitmask, *id,
            NDPI_PROTOCOL_BJNP,
            ndpi_search_bjnp,
            NDPI_SELECTION_BITMASK_PROTOCOL_UDP_WITH_PAYLOAD,
            SAVE_DETECTION_BITMASK_AS_UNKNOWN,
            ADD_TO_DETECTION_BITMASK);
    *id += 1;
}
