/*####COPYRIGHTBEGIN####
 -------------------------------------------
 Copyright (C) 2005 Steve Karg

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program 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 General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to:
 The Free Software Foundation, Inc.
 59 Temple Place - Suite 330
 Boston, MA  02111-1307, USA.

 As a special exception, if other files instantiate templates or
 use macros or inline functions from this file, or you compile
 this file and link it with other works to produce a work based
 on this file, this file does not by itself cause the resulting
 work to be covered by the GNU General Public License. However
 the source code for this file must still be made available in
 accordance with section (3) of the GNU General Public License.

 This exception does not invalidate any other reasons why a work
 based on this file might be covered by the GNU General Public
 License.
 -------------------------------------------
####COPYRIGHTEND####*/
#ifndef NPDU_H
#define NPDU_H

#include <stdbool.h>
#include <stdint.h>
#include <assert.h>
#include "bacdef.h"
#include "bacenum.h"

// an NPDU structure keeps the parameter stack to a minimum
typedef struct bacnet_npdu_data_t
{
  uint8_t protocol_version;
  // parts of the control octet:
  bool data_expecting_reply;  // true for confirmed messages
  bool network_layer_message; // false if APDU
  BACNET_MESSAGE_PRIORITY priority;
  // optional network message info
  BACNET_NETWORK_MESSAGE_TYPE network_message_type; // optional
  uint16_t vendor_id; // optional, if net message type is > 0x80
  uint8_t hop_count;
} BACNET_NPDU_DATA;

uint8_t npdu_encode_max_seg_max_apdu(int max_segs, int max_apdu);
int npdu_encode_raw(
  uint8_t *npdu,
  BACNET_ADDRESS *dest,
  BACNET_ADDRESS *src,
  BACNET_NPDU_DATA *npdu_data);
// encode the NPDU portion of the packet for an APDU
int npdu_encode_apdu(
  uint8_t *npdu,
  BACNET_ADDRESS *dest,
  BACNET_ADDRESS *src,
  bool data_expecting_reply,  // true for confirmed messages
  BACNET_MESSAGE_PRIORITY priority);

int npdu_decode(
  uint8_t *npdu,
  BACNET_ADDRESS *dest,
  BACNET_ADDRESS *src,
  BACNET_NPDU_DATA *npdu_data);

#endif