/* -*-	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