00001 /* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */ 00002 /* 00003 * Copyright (c) 1996-1997 The Regents of the University of California. 00004 * All rights reserved. 00005 * 00006 * Redistribution and use in source and binary forms, with or without 00007 * modification, are permitted provided that the following conditions 00008 * are met: 00009 * 1. Redistributions of source code must retain the above copyright 00010 * notice, this list of conditions and the following disclaimer. 00011 * 2. Redistributions in binary form must reproduce the above copyright 00012 * notice, this list of conditions and the following disclaimer in the 00013 * documentation and/or other materials provided with the distribution. 00014 * 3. All advertising materials mentioning features or use of this software 00015 * must display the following acknowledgement: 00016 * This product includes software developed by the Network Research 00017 * Group at Lawrence Berkeley National Laboratory. 00018 * 4. Neither the name of the University nor of the Laboratory may be used 00019 * to endorse or promote products derived from this software without 00020 * specific prior written permission. 00021 * 00022 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00023 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00024 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00025 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00026 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00027 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00028 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00029 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00030 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00031 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00032 * SUCH DAMAGE. 00033 * 00034 * @(#) $Header: /cvsroot/nsnam/ns-2/link/delay.h,v 1.16 2003/04/01 01:15:01 sfloyd Exp $ (LBL) 00035 */ 00036 00037 #ifndef ns_delay_h 00038 #define ns_delay_h 00039 00040 #include <assert.h> 00041 00042 #include "packet.h" 00043 #include "queue.h" 00044 #include "ip.h" 00045 #include "connector.h" 00046 00047 class LinkDelay : public Connector { 00048 public: 00049 LinkDelay(); 00050 void recv(Packet* p, Handler*); 00051 void send(Packet* p, Handler*); 00052 void handle(Event* e); 00053 double delay() { return delay_; } 00054 inline double txtime(Packet* p) { 00055 return (8. * hdr_cmn::access(p)->size() / bandwidth_); 00056 } 00057 double bandwidth() const { return bandwidth_; } 00058 void pktintran(int src, int group); 00059 protected: 00060 int command(int argc, const char*const* argv); 00061 void reset(); 00062 double bandwidth_; /* bandwidth of underlying link (bits/sec) */ 00063 double delay_; /* line latency */ 00064 Event intr_; 00065 int dynamic_; /* indicates whether or not link is ~ */ 00066 double latest_time_; /* latest scheduled packet time, for use 00067 * with avoidReordering_ */ 00068 PacketQueue* itq_; 00069 int total_[4]; 00070 int avoidReordering_; /* indicates whether or not to avoid 00071 * reordering when link bandwidth or delay 00072 * changes */ 00073 }; 00074 00075 #endif
1.7.1