/* -*-	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. * *//* 8/02 Tom Kelly - Made scoreboard a general interface to allow *                  easy swapping of scoreboard algorithms.   *                - Allow scoreboard buffer size to grow dynamically *                - Made ScoreBoardNode a more compact data structure */#ifndef ns_scoreboard_h#define ns_scoreboard_h//  Definition of the scoreboard class:#include "tcp.h"class ScoreBoardNode {public:	int seq_no_;		/* Packet number */	char ack_flag_;         /* Acked by cumulative ACK */	char sack_flag_;        /* Acked by SACK block */	char retran_;           /* Packet retransmitted */	int snd_nxt_;		/* snd_nxt at time of retransmission */};class ScoreBoard {  public:	ScoreBoard(ScoreBoardNode* sbn, int sz): first_(0), length_(0), sbsize_(sz), changed_(0),SBN(sbn) {}	virtual ~ScoreBoard(){if(SBN) delete[] SBN;}	virtual int IsEmpty () {return (length_ == 0);}	virtual void ClearScoreBoard (); 	virtual int GetNextRetran ();	virtual void Dump();	virtual void MarkRetran (int retran_seqno);	virtual void MarkRetran (int retran_seqno, int snd_nxt);	virtual int UpdateScoreBoard (int last_ack_, hdr_tcp*);	virtual int CheckUpdate() {return (changed_);}	virtual int CheckSndNxt (hdr_tcp*);	virtual int GetNextUnacked (int seqno);        inline int IsChanged() { return changed_; }	  protected:	int first_, length_, sbsize_, changed_;	ScoreBoardNode * SBN; 	void resizeSB(int sz);};#endif