00001 /* 00002 * Copyright (c) 2006-2007 by the Protocol Engineering Lab, U of Delaware 00003 * All rights reserved. 00004 * 00005 * Protocol Engineering Lab web page : http://pel.cis.udel.edu/ 00006 * 00007 * Paul D. Amer <amer@@cis,udel,edu> 00008 * Armando L. Caro Jr. <acaro@@cis,udel,edu> 00009 * 00010 * Redistribution and use in source and binary forms, with or without 00011 * modification, are permitted provided that the following conditions 00012 * are met: 00013 * 00014 * 1. Redistributions of source code must retain the above copyright 00015 * notice, this list of conditions and the following disclaimer. 00016 * 00017 * 2. Redistributions in binary form must reproduce the above copyright 00018 * notice, this list of conditions and the following disclaimer in the 00019 * documentation and/or other materials provided with the distribution. 00020 * 00021 * 3. Neither the name of the University nor of the Laboratory may be used 00022 * to endorse or promote products derived from this software without 00023 * specific prior written permission. 00024 * 00025 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 00026 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00027 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00028 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 00029 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00030 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00031 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00032 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00033 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00034 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00035 * SUCH DAMAGE. 00036 * 00037 * @(#) $Header: /cvsroot/nsnam/ns-2/sctp/sctp-mfrTimestamp.h,v 1.2 2007/06/17 21:44:41 tom_henderson Exp $ (UD/PEL) 00038 */ 00039 00040 /* This extension combines MultipleFastRtx and Timestamp extensions. 00041 * 00042 * MultipleFastRtx extension implements the Caro Multiple Fast Retransmit 00043 * Algorithm. Caro's Algorithm introduces a fastRtxRecover state variable 00044 * per TSN in the send buffer. Any time a TSN is retransmitted, its 00045 * fastRtxRecover is set to the highest TSN outstanding at the time of 00046 * retransmit. That way, only missing reports triggered by TSNs beyond 00047 * fastRtxRecover may trigger yet another fast retransmit. 00048 * 00049 * Timestamp extension adds a TIMESTAMP chunk into every packet with DATA 00050 * or SACK chunk(s). The timestamps allow RTT measurements to be made per 00051 * packet on both original transmissiosn and retransmissions. Thus, Karn's 00052 * algorithm is no longer needed. 00053 */ 00054 00055 #ifndef ns_sctp_mfrTimestamp_h 00056 #define ns_sctp_mfrTimestamp_h 00057 00058 #include "sctp-timestamp.h" 00059 00060 class MfrTimestampSctpAgent : public virtual TimestampSctpAgent 00061 { 00062 public: 00063 MfrTimestampSctpAgent(); 00064 00065 protected: 00066 virtual void delay_bind_init_all(); 00067 virtual int delay_bind_dispatch(const char *varName, const char *localName, 00068 TclObject *tracer); 00069 00070 /* tracing functions 00071 */ 00072 virtual void TraceVar(const char*); 00073 virtual void TraceAll(); 00074 00075 /* sending functions 00076 */ 00077 virtual void AddToSendBuffer(SctpDataChunkHdr_S *, int, u_int, SctpDest_S *); 00078 virtual void SendBufferDequeueUpTo(u_int); 00079 00080 /* processing functions 00081 */ 00082 virtual Boolean_E ProcessGapAckBlocks(u_char *, Boolean_E); 00083 00084 TracedInt tiMfrCount; // trace each time MFR gets triggered 00085 }; 00086 00087 #endif
1.7.1