/*

 * vmware.c

 *

 * Copyright (C) 2016-22 - ntop.org

 *

 * 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_VMWARE

#include "ndpi_api.h"

#include "ndpi_private.h"

static void ndpi_search_vmware(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 vmware\n");

  /* Check whether this is an VMWARE flow */

  if(packet->udp != NULL){

    if((packet->payload_packet_len == 66) &&

       (ntohs(packet->udp->dest) == 902) &&

       ((packet->payload[0] & 0xFF) == 0xA4)){

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

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

      return;

    }

  }

  NDPI_EXCLUDE_PROTO(ndpi_struct, flow);

}

void init_vmware_dissector(struct ndpi_detection_module_struct *ndpi_struct, u_int32_t *id)

{

  ndpi_set_bitmask_protocol_detection("VMWARE", ndpi_struct, *id,

              NDPI_PROTOCOL_VMWARE,

              ndpi_search_vmware,

              NDPI_SELECTION_BITMASK_PROTOCOL_V4_V6_UDP_WITH_PAYLOAD,

              SAVE_DETECTION_BITMASK_AS_UNKNOWN,

              ADD_TO_DETECTION_BITMASK);

  *id += 1;

}