tcp-session.h
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- /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
- /*
- * Copyright (c) 1997 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the Daedalus Research
- * Group at the University of California Berkeley.
- * 4. Neither the name of the University nor of the Laboratory may be used
- * to endorse or promote products derived from this software without
- * specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Contributed by the Daedalus Research Group, http://daedalus.cs.berkeley.edu
- *
- * @(#) $Header: /cvsroot/nsnam/ns-2/tcp/tcp-session.h,v 1.8 1999/09/09 03:25:26 salehi Exp $ (UCB)
- */
- #ifndef nc_tcp_session_h
- #define ns_tcp_session_h
- #include "agent.h"
- #include "timer-handler.h"
- #include "chost.h"
- #define FINE_ROUND_ROBIN 1
- #define COARSE_ROUND_ROBIN 2
- #define RANDOM 3
- class TcpSessionAgent;
- class SessionRtxTimer : public TimerHandler {
- public:
- SessionRtxTimer(TcpSessionAgent *a) : TimerHandler() { a_ = a; }
- protected:
- virtual void expire(Event *e);
- TcpSessionAgent *a_;
- };
- class SessionResetTimer : public TimerHandler {
- public:
- SessionResetTimer(TcpSessionAgent *a) : TimerHandler() { a_ = a; }
- protected:
- virtual void expire(Event *e);
- TcpSessionAgent *a_;
- };
- class SessionBurstSndTimer : public TimerHandler {
- public:
- SessionBurstSndTimer(TcpSessionAgent *a) : TimerHandler() { a_ = a; }
- protected:
- virtual void expire(Event *e);
- TcpSessionAgent *a_;
- };
- /*
- * This class implements the notion of a TCP session. It integrates congestion
- * control and loss detection functionality across the one or more IntTcp
- * connections that comprise the session.
- */
- class TcpSessionAgent : public CorresHost {
- public:
- TcpSessionAgent();
- int command(int argc, const char*const* argv);
- void reset_rtx_timer(int mild, int backoff = 1); /* XXX mild needed ? */
- void set_rtx_timer();
- void cancel_rtx_timer();
- void cancel_timers();
- void newack(Packet *pkt);
- int fs_pkt();
- void rtt_update_exact(double tao);
- void timeout(int tno);
- virtual Segment* add_pkts(int size, int seqno, int sessionSeqno, int daddr,
- int dport, int sport, double ts, IntTcpAgent *sender);
- virtual void add_agent(IntTcpAgent *agent, int size, double winMult,
- int winInc, int ssthresh);
- int window();
- void set_weight(IntTcpAgent *tcp, int wt);
- void reset_dyn_weights();
- IntTcpAgent *who_to_snd(int how);
- void send_much(IntTcpAgent *agent, int force, int reason);
- void recv(IntTcpAgent *agent, Packet *pkt, int amt_data_acked);
- void setflags(Packet *pkt);
- int findSessionSeqno(IntTcpAgent *sender, int seqno);
- void removeSessionSeqno(int sessionSeqno);
- void quench(int how, IntTcpAgent *sender, int seqno);
- virtual void traceVar(TracedVar* v);
- // inline nsaddr_t& addr() {return addr_;}
- // inline nsaddr_t& dst() {return dst_;}
- static Islist<TcpSessionAgent> sessionList_;
- protected:
- SessionRtxTimer rtx_timer_;
- SessionBurstSndTimer burstsnd_timer_;
- int sessionSeqno_;
- double last_send_time_;
- Segment *last_seg_sent_;
- IntTcpAgent *curConn_;
- int numConsecSegs_;
- int schedDisp_;
- int wtSum_;
- int dynWtSum_;
- };
- #endif