/* -*-C++-*- */
// $Id$
#ifndef SAGENT_CLS_
#define SAGENT_CLS_
// ============================================================================
//
// = LIBRARY
//    asnmp
//
// = FILENAME
//    sagent.h
//
// = DESCRIPTION
//   SNMP agent class defintion. The sagent class provides an object oriented
//   approach for creating SNMP Agents. The sagent class is an encapsulation of SNMP
//   sessions, gets, sets, etc.
//
// = AUTHOR
//    Michael R. MacFaden
//
// ============================================================================
#include "ace/Reactor.h"

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

#include "ace/SOCK_Dgram.h"

#include "asnmp/oid.h"                // snmp++ oid class
#include "asnmp/vb.h"                 // snbmp++ vb class
#include "asnmp/target.h"             // snmp++ target class
#include "asnmp/pdu.h"                // snmp++ pdu class
#include "asnmp/snmperrs.h"           // error macros and strings
#include "asnmp/address.h"            // snmp++ address class defs
#include "asnmp/snmp.h"               // snmp interface

// sagent - supports Version 1 operations in blocking mode

#define DEF_AGENT_PORT (161)

class ACE_Export sagent : public ACE_Event_Handler, Snmp
  // = TITLE
  //      Concrete class sagent defines the session and interface to
  //      communicate with another SNMP Version 1 manager
{
 public:


    // override the next three methods (callbacks) to implment your agent
    //

    virtual int handle_get( Pdu &pdu, UdpTarget &target) = 0;
    // retrieve data from a peer agent for a given list of oid values

    virtual int handle_get_next( Pdu &pdu, UdpTarget &target) = 0;
    // retrieve data lexically adjacent to the oids specified in the pdu
    // from the peer agent

    virtual int handle_set( Pdu &pdu, UdpTarget &target) = 0;
    // set data in the agent from the list of oids in the pdu

    virtual int handle_input(ACE_HANDLE);
    // new pdu received from mgr (reactor calls this)

    virtual ACE_HANDLE get_handle() const;
    // retrieve io descriptor (reactor uses this)

    int respond(Pdu& pdu, UdpTarget& tgt);
    // send a response pdu to the mgr

 protected:
    sagent(unsigned short port = DEF_AGENT_PORT);
    virtual ~sagent();

private:
  sagent(const sagent&);
  Pdu pdu_;                     // current input pdu
  UdpTarget tgt_;               //  addr & com strs
};

#endif //SAGENT_CLS_