00001 /* 00002 * Copyright (c) 2002 Tom Kelly, University of Cambridge 00003 * All rights reserved. 00004 * 00005 * Redistribution and use in source and binary forms, with or without 00006 * modification, are permitted provided that the following conditions 00007 * are met: 00008 * 1. Redistributions of source code must retain the above copyright 00009 * notice, this list of conditions and the following disclaimer. 00010 * 2. Redistributions in binary form must reproduce the above copyright 00011 * notice, this list of conditions and the following disclaimer in the 00012 * documentation and/or other materials provided with the distribution. 00013 * 3. All advertising materials mentioning features or use of this software 00014 * must display the following acknowledgement: 00015 * This product includes software developed by the MASH Research 00016 * Group at the University of California Berkeley. 00017 * 4. Neither the name of the University nor of the Research Group may be 00018 * used to endorse or promote products derived from this software without 00019 * specific prior written permission. 00020 * 00021 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 00022 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00023 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00024 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 00025 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 00026 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 00027 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 00028 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 00029 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 00030 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 00031 * SUCH DAMAGE. 00032 * 00033 */ 00034 00035 #ifndef ns_scoreboard_rq_h 00036 #define ns_scoreboard_rq_h 00037 00038 // Definition of the scoreboardRQ class 00039 // - a shim over the FullTCP reassembly queue code 00040 00041 #include "scoreboard.h" 00042 #include "rq.h" 00043 00044 class ScoreBoardRQ : public ScoreBoard { 00045 public: 00046 ScoreBoardRQ(): ScoreBoard(NULL, 0), h_seqno_(-1),sack_min(-1), rq_(sack_min){}; 00047 virtual ~ScoreBoardRQ(){delete[] SBN;} 00048 virtual int IsEmpty (); 00049 virtual void ClearScoreBoard () {rq_.clear(); h_seqno_ = -1;}; 00050 virtual int GetNextRetran (); 00051 virtual void MarkRetran (int retran_seqno){ 00052 if (retran_seqno >= h_seqno_) 00053 h_seqno_ = retran_seqno+1; 00054 }; 00055 virtual void MarkRetran (int retran_seqno, int snd_nxt){ 00056 if (retran_seqno >= h_seqno_) 00057 h_seqno_ = retran_seqno+1; 00058 }; 00059 virtual int UpdateScoreBoard (int last_ack_, hdr_tcp*); 00060 virtual int CheckUpdate() {return (changed_);} 00061 virtual int CheckSndNxt (hdr_tcp*); 00062 virtual int GetNextUnacked (int seqno); 00063 virtual void Dump(); 00064 protected: 00065 int h_seqno_; 00066 int sack_min; // highest cumulative ack seen so far, plus one 00067 00068 ReassemblyQueue rq_; 00069 }; 00070 00071 #endif
1.7.1