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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (C) 1999 by the University of Southern California
* $Id: tcp-abs.h,v 1.2 2005/08/25 18:58:12 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* 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.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
/*
* Contributed by Polly Huang (USC/ISI), http://www-scf.usc.edu/~bhuang
* @(#) $Header: /cvsroot/nsnam/ns-2/tcp/tcp-abs.h,v 1.2 2005/08/25 18:58:12 johnh Exp $ (LBL)";
*/
#include "agent.h"
#include "fsm.h"
class AbsTcpAgent;
class AbsTcpTimer : public TimerHandler {
public:
AbsTcpTimer(AbsTcpAgent *a) : TimerHandler() { a_ = a; }
protected:
AbsTcpAgent *a_;
void expire(Event *e);
};
class AbsTcpAgent : public Agent {
public:
AbsTcpAgent();
void timeout();
void sendmsg(int pktcnt);
void advanceby(int pktcnt);
void start();
void send_batch();
void drop(int seqno);
void finish();
void recv(Packet* pkt, Handler*);
void output(int seqno);
inline int& flowid() { return fid_; }
int command(int argc, const char*const* argv);
protected:
double rtt_;
FSMState* current_;
int offset_;
int seqno_lb_; // seqno when finishing last batch
int connection_size_;
AbsTcpTimer timer_;
int rescheduled_;
void cancel_timer() {
timer_.force_cancel();
}
void set_timer(double time) {
timer_.resched(time);
}
};
class AbsTcpTahoeAckAgent : public AbsTcpAgent {
public:
AbsTcpTahoeAckAgent();
};
class AbsTcpRenoAckAgent : public AbsTcpAgent {
public:
AbsTcpRenoAckAgent();
};
class AbsTcpTahoeDelAckAgent : public AbsTcpAgent {
public:
AbsTcpTahoeDelAckAgent();
};
class AbsTcpRenoDelAckAgent : public AbsTcpAgent {
public:
AbsTcpRenoDelAckAgent();
};
//AbsTcpSink
class AbsTcpSink : public Agent {
public:
AbsTcpSink();
void recv(Packet* pkt, Handler*);
protected:
};
class AbsDelAckSink;
class AbsDelayTimer : public TimerHandler {
public:
AbsDelayTimer(AbsDelAckSink *a) : TimerHandler() { a_ = a; }
protected:
void expire(Event *e);
AbsDelAckSink *a_;
};
class AbsDelAckSink : public AbsTcpSink {
public:
AbsDelAckSink();
void recv(Packet* pkt, Handler*);
void timeout();
protected:
Packet* save_; /* place to stash packet while delaying */
double interval_;
AbsDelayTimer delay_timer_;
};
// Dropper Class
class Dropper {
public:
AbsTcpAgent* agent_;
Dropper* next_;
};
class DropTargetAgent : public Connector {
public:
DropTargetAgent();
void recv(Packet* pkt, Handler*);
void insert_tcp(AbsTcpAgent* tcp);
static DropTargetAgent& instance() {
return (*instance_); // general access to TahoeAckFSM
}
protected:
Dropper* dropper_list_;
static DropTargetAgent* instance_;
};
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