/* -*-C++-*- */
#ifndef WPDU_H_
#define WPDU_H_
//=============================================================================
/**
 *  @file    wpdu.h
 *
 *  Adapter class. Converts a Pdu and GenTarget into a format
 *  that can be stuffed out a I/O port
 *
 *  @author Michael R. MacFaden re-worked api
 *  @author use ACE APIPeter E Mellquist wrote original class snmpmsg
 */
//=============================================================================


#include "ace/config-all.h"

#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */

#include "asnmp/asn1.h"
#include "asnmp/pdu.h"
#include "asnmp/target.h"

struct snmp_pdu;
/**
 * @class wpdu
 *
 * @brief Implement an Adapter pattern between CMU SNMP and HP SNMP++
 *
 * this is an adapter class, it peforms the following transformations
 * PDU / Target -> iovec buffer
 * iovec buffer -> PDU / Target
 */
class ASNMP_Export wpdu
{
public:

  /// construct CMU data from HP SNMP++ objects
  /// construct HP SNMP++ objects from raw buffer via CMU SNMP datatypes
  wpdu(const Pdu& pdu, const UdpTarget& target);
  wpdu(const iovec& buffer);
  wpdu(); // same as using iovec?

  ~wpdu();

  /// constructor completed ok? rc = 1 else 0
  int valid() const;

  /// return raw data stream via CMU code
  const iovec& get_buffer() const;

  /// return HP SNMP++ pdu
  int get_pdu(Pdu& pdu, snmp_version& version);

  /// return community strptr
  const unsigned char *get_community() const;

private:
  int convert_vb_to_smival( Vb &tempvb, SmiVALUE *smival );
  int load_vbs(snmp_pdu *raw_pdu, const Pdu& pdu);
  int restore_vbs(Pdu& pdu, const snmp_pdu *raw_pdu) const;
  void free_smival_descriptor( SmiVALUE *smival );
  static void copy_iovec(iovec& dest, const iovec& src);
  int set_trap_info(snmp_pdu *raw_pdu, const Pdu& pdu) const;

  /// raw format
  iovec iovec_;

  /// object construction state
  int valid_flag_;

  /// snmp version
  snmp_version version_;

  unsigned char community_name[MAX_COMM_STR_LEN];
  unsigned long comm_len; // = MAX_COMM_STR_LEN;
};

#endif // WPDU_H_
