delay.h

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/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
 * Copyright (c) 1996-1997 The Regents of the University of California.
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 *  This product includes software developed by the Network Research
 *  Group at Lawrence Berkeley National Laboratory.
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 * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/link/delay.h,v 1.16 2003/04/01 01:15:01 sfloyd Exp $ (LBL)
 */

#ifndef ns_delay_h
#define ns_delay_h

#include <assert.h>

#include "packet.h"
#include "queue.h"
#include "ip.h"
#include "connector.h"

class LinkDelay : public Connector {
 public:
    LinkDelay();
    void recv(Packet* p, Handler*);
    void send(Packet* p, Handler*);
    void handle(Event* e);
    double delay() { return delay_; }
    inline double txtime(Packet* p) {
        return (8. * hdr_cmn::access(p)->size() / bandwidth_);
    }
    double bandwidth() const { return bandwidth_; }
    void pktintran(int src, int group);
 protected:
    int command(int argc, const char*const* argv);
    void reset();
    double bandwidth_;  /* bandwidth of underlying link (bits/sec) */
    double delay_;      /* line latency */
    Event intr_;
    int dynamic_;       /* indicates whether or not link is ~ */
    double latest_time_;    /* latest scheduled packet time, for use
                 *  with avoidReordering_ */
    PacketQueue* itq_;
    int total_[4];
    int avoidReordering_;   /* indicates whether or not to avoid
                 *  reordering when link bandwidth or delay 
                 *  changes */
};

#endif

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