?? scoreboard-rh.h
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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- *//* * Copyright (c) @ Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the MASH Research * Group at the University of California Berkeley. * 4. Neither the name of the University nor of the Research Group may be * used to endorse or promote products derived from this software without * specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/tcp/scoreboard-rh.h,v 1.2 2000/08/12 21:46:10 sfloyd Exp $ */#ifndef ns_scoreboard_h#define ns_scoreboard_h// Definition of the scoreboard class:#define SBSIZE 1024#include "tcp.h"class ScoreBoardRH { public: ScoreBoardRH(int *numdupacks) : numdupacks_(numdupacks) {first_=0; length_=0; retran_occured_=0;} int IsEmpty () {return (length_ == 0);} void ClearScoreBoard (); int GetNextRetran (); void MarkRetran (int retran_seqno, int snd_nxt, int rh_id); int UpdateScoreBoard (int last_ack_, hdr_tcp*, int rh_id); int CheckSndNxt (int sack_max); int GetFack (int last_ack); int GetNewHoles (); void TimeoutScoreBoard (int snd_nxt); int FakeSack (int last_ack, int num_dupacks); int RetranSacked (int rh_id); int RetranOccurred (int rh_id) {return (retran_occured_ == rh_id);} protected: int first_, length_; int retran_occured_; /* This variable stores the last adjustment interval in which a retransmission occured */ int retran_sacked_; /* This variable stores the last adjustment interval in which a retransmission was sacked */ int *numdupacks_; /* I know, it stinks... But this is numdupacks_ from * our parent TCP stack. */ struct ScoreBoardNode { int seq_no_; /* Packet number */ int ack_flag_; /* Acked by cumulative ACK */ int sack_flag_; /* Acked by SACK block */ int retran_; /* Packet retransmitted */ int snd_nxt_; /* snd_nxt at time of retransmission */ int sack_cnt_; /* number of reports for this hole */ int rh_id_; /* The id of the rate-halving adjustment interval */ } SBN[SBSIZE+1];};#endif
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