00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 00003 /* 00004 * Copyright (C) 1999 by the University of Southern California 00005 * $Id: tcp-abs.h,v 1.2 2005/08/25 18:58:12 johnh Exp $ 00006 * 00007 * This program is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU General Public License, 00009 * version 2, as published by the Free Software Foundation. 00010 * 00011 * This program is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License along 00017 * with this program; if not, write to the Free Software Foundation, Inc., 00018 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA. 00019 * 00020 * 00021 * The copyright of this module includes the following 00022 * linking-with-specific-other-licenses addition: 00023 * 00024 * In addition, as a special exception, the copyright holders of 00025 * this module give you permission to combine (via static or 00026 * dynamic linking) this module with free software programs or 00027 * libraries that are released under the GNU LGPL and with code 00028 * included in the standard release of ns-2 under the Apache 2.0 00029 * license or under otherwise-compatible licenses with advertising 00030 * requirements (or modified versions of such code, with unchanged 00031 * license). You may copy and distribute such a system following the 00032 * terms of the GNU GPL for this module and the licenses of the 00033 * other code concerned, provided that you include the source code of 00034 * that other code when and as the GNU GPL requires distribution of 00035 * source code. 00036 * 00037 * Note that people who make modified versions of this module 00038 * are not obligated to grant this special exception for their 00039 * modified versions; it is their choice whether to do so. The GNU 00040 * General Public License gives permission to release a modified 00041 * version without this exception; this exception also makes it 00042 * possible to release a modified version which carries forward this 00043 * exception. 00044 * 00045 */ 00046 00047 /* 00048 * Contributed by Polly Huang (USC/ISI), http://www-scf.usc.edu/~bhuang 00049 * @(#) $Header: /cvsroot/nsnam/ns-2/tcp/tcp-abs.h,v 1.2 2005/08/25 18:58:12 johnh Exp $ (LBL)"; 00050 */ 00051 00052 #include "agent.h" 00053 #include "fsm.h" 00054 00055 class AbsTcpAgent; 00056 00057 class AbsTcpTimer : public TimerHandler { 00058 public: 00059 AbsTcpTimer(AbsTcpAgent *a) : TimerHandler() { a_ = a; } 00060 protected: 00061 AbsTcpAgent *a_; 00062 void expire(Event *e); 00063 }; 00064 00065 class AbsTcpAgent : public Agent { 00066 public: 00067 AbsTcpAgent(); 00068 void timeout(); 00069 void sendmsg(int pktcnt); 00070 void advanceby(int pktcnt); 00071 void start(); 00072 void send_batch(); 00073 void drop(int seqno); 00074 void finish(); 00075 void recv(Packet* pkt, Handler*); 00076 void output(int seqno); 00077 inline int& flowid() { return fid_; } 00078 int command(int argc, const char*const* argv); 00079 protected: 00080 double rtt_; 00081 FSMState* current_; 00082 int offset_; 00083 int seqno_lb_; // seqno when finishing last batch 00084 int connection_size_; 00085 AbsTcpTimer timer_; 00086 int rescheduled_; 00087 void cancel_timer() { 00088 timer_.force_cancel(); 00089 } 00090 void set_timer(double time) { 00091 timer_.resched(time); 00092 } 00093 00094 }; 00095 00096 00097 class AbsTcpTahoeAckAgent : public AbsTcpAgent { 00098 public: 00099 AbsTcpTahoeAckAgent(); 00100 }; 00101 00102 class AbsTcpRenoAckAgent : public AbsTcpAgent { 00103 public: 00104 AbsTcpRenoAckAgent(); 00105 }; 00106 00107 class AbsTcpTahoeDelAckAgent : public AbsTcpAgent { 00108 public: 00109 AbsTcpTahoeDelAckAgent(); 00110 }; 00111 00112 class AbsTcpRenoDelAckAgent : public AbsTcpAgent { 00113 public: 00114 AbsTcpRenoDelAckAgent(); 00115 }; 00116 00117 //AbsTcpSink 00118 class AbsTcpSink : public Agent { 00119 public: 00120 AbsTcpSink(); 00121 void recv(Packet* pkt, Handler*); 00122 protected: 00123 }; 00124 00125 00126 class AbsDelAckSink; 00127 00128 class AbsDelayTimer : public TimerHandler { 00129 public: 00130 AbsDelayTimer(AbsDelAckSink *a) : TimerHandler() { a_ = a; } 00131 protected: 00132 void expire(Event *e); 00133 AbsDelAckSink *a_; 00134 }; 00135 00136 class AbsDelAckSink : public AbsTcpSink { 00137 public: 00138 AbsDelAckSink(); 00139 void recv(Packet* pkt, Handler*); 00140 void timeout(); 00141 protected: 00142 Packet* save_; /* place to stash packet while delaying */ 00143 double interval_; 00144 AbsDelayTimer delay_timer_; 00145 }; 00146 00147 // Dropper Class 00148 class Dropper { 00149 public: 00150 AbsTcpAgent* agent_; 00151 Dropper* next_; 00152 }; 00153 00154 class DropTargetAgent : public Connector { 00155 public: 00156 DropTargetAgent(); 00157 void recv(Packet* pkt, Handler*); 00158 void insert_tcp(AbsTcpAgent* tcp); 00159 static DropTargetAgent& instance() { 00160 return (*instance_); // general access to TahoeAckFSM 00161 } 00162 protected: 00163 Dropper* dropper_list_; 00164 static DropTargetAgent* instance_; 00165 };