00001 00002 /* 00003 * qsagent.h 00004 * Copyright (C) 2001 by the University of Southern California 00005 * $Id: qsagent.h,v 1.5 2006/02/22 20:35:37 sallyfloyd 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 * Quick Start for TCP and IP. 00049 * A scheme for transport protocols to dynamically determine initial 00050 * congestion window size. 00051 * 00052 * http://www.ietf.org/internet-drafts/draft-amit-quick-start-02.ps 00053 * 00054 * This defines the Class for the Quick Start agent. "Agent/QSAgent" 00055 * 00056 * qsagent.h 00057 * 00058 * Srikanth Sundarrajan, 2002 00059 * sundarra@usc.edu 00060 */ 00061 00062 #ifndef _QSAGENT_H 00063 #define _QSAGENT_H 00064 00065 #include <stdarg.h> 00066 00067 #include "object.h" 00068 #include "agent.h" 00069 #include "packet.h" 00070 #include "hdr_qs.h" 00071 #include "timer-handler.h" 00072 #include "lib/bsd-list.h" 00073 #include "queue.h" 00074 #include "delay.h" 00075 00076 class QSAgent; 00077 00078 class QSTimer: public TimerHandler { 00079 public: 00080 QSTimer(QSAgent * qs_handle) : TimerHandler() { qs_handle_ = qs_handle; } 00081 virtual void expire(Event * e); 00082 00083 protected: 00084 QSAgent * qs_handle_; 00085 }; 00086 00087 class Agent; 00088 class QSAgent : public Agent{ 00089 public: 00090 00091 virtual int command(int argc, const char*const* argv); 00092 virtual void recv(Packet*, Handler* callback = 0); 00093 00094 TclObject * old_classifier_; 00095 00096 int qs_enabled_; 00097 int algorithm_; // QS request processing algorithm 00098 // 3 for the recommended algorithm. 00099 double state_delay_; 00100 double alloc_rate_; 00101 double threshold_; // for algorithm_ 3, utilized bandwidth 00102 // must be less than threshold. 00103 int max_rate_; // maximum rate for one rate request, for some 00104 // quickstart algorithms (but not for #3) 00105 int mss_; 00106 00107 /* 00108 * 1: Bps = rate * 10 KB 00109 * 2: Bps = 2 ^ rate * 1024 00110 */ 00111 static int rate_function_; 00112 00113 QSTimer qs_timer_; 00114 00115 QSAgent(); 00116 ~QSAgent(); 00117 00118 double aggr_approval_; 00119 double prev_int_aggr_; 00120 00121 protected: 00122 double process(LinkDelay *link, Queue *queue, double ratereq); 00123 }; 00124 00125 #endif // _QSAGENT_H