//
// $Id: Ping.hh,v 1.1.1.1 2000/03/10 16:32:19 engin Exp $
//
// Author(s): Ramesh Govindan

#ifndef _Ping_hh
#define _Ping_hh

#include "sys/Time.hh"
#include "util/Handler.hh"
#include "sched/Timer.hh"

// Classes defined elsewhere
class Handler;
class IP;

class Ping : public ListNode {
  private:
    Ping(const Ping&);

  public:
    Ping(Address*,			// In: address to ping
         Handler&);			// In: handler to call back on reply

    ~Ping();

    // Send one
    void
    send();

    // Handle timers
    void
    handleTimer();

    // Process received packet
    Boolean				// Out: true if matched
    receive(IP*);			// In: pointer to received IP packet

    Address	addr;
    TimeShort	lastRtt;

  private:
    Handler		done;
    Timer*		timer;
    unsigned int	sequence;
    TimeLong		sent;
};

//  Copyright (c) 1994 by the University of Southern California.
//  All rights reserved.
//
//  Permission to use, copy, modify, and distribute this software and
//  its documentation in source and binary forms for lawful
//  non-commercial purposes and without fee is hereby granted, provided
//  that the above copyright notice appear in all copies and that both
//  the copyright notice and this permission notice appear in supporting
//  documentation, and that any documentation, advertising materials,
//  and other materials related to such distribution and use acknowledge
//  that the software was developed by the University of Southern
//  California and/or Information Sciences Institute.
//  The name of the University of Southern California may not
//  be used to endorse or promote products derived from this software
//  without specific prior written permission.
//
//  THE UNIVERSITY OF SOUTHERN CALIFORNIA DOES NOT MAKE ANY REPRESENTATIONS
//  ABOUT THE SUITABILITY OF THIS SOFTWARE FOR ANY PURPOSE.  THIS SOFTWARE IS
//  PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
//  INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
//  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND 
//  NON-INFRINGEMENT.
//
//  IN NO EVENT SHALL USC, OR ANY OTHER CONTRIBUTOR BE LIABLE FOR ANY
//  SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT,
//  TORT, OR OTHER FORM OF ACTION, ARISING OUT OF OR IN CONNECTION WITH,
//  THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
//  Questions concerning this software should be directed to 
//  scan@isi.edu.
//

#endif _Ping_hh
