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/*
* rcvbuf.h
* Copyright (C) 2001 by the University of Southern California
* $Id: rcvbuf.h,v 1.2 2005/08/25 18:58:08 johnh Exp $
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
*
*
* The copyright of this module includes the following
* linking-with-specific-other-licenses addition:
*
* In addition, as a special exception, the copyright holders of
* this module give you permission to combine (via static or
* dynamic linking) this module with free software programs or
* libraries that are released under the GNU LGPL and with code
* included in the standard release of ns-2 under the Apache 2.0
* license or under otherwise-compatible licenses with advertising
* requirements (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for this module and the licenses of the
* other code concerned, provided that you include the source code of
* that other code when and as the GNU GPL requires distribution of
* source code.
*
* Note that people who make modified versions of this module
* are not obligated to grant this special exception for their
* modified versions; it is their choice whether to do so. The GNU
* General Public License gives permission to release a modified
* version without this exception; this exception also makes it
* possible to release a modified version which carries forward this
* exception.
*
*/
/*
* Pragmatic General Multicast (PGM), Reliable Multicast
*
* rcvbuf.h
*
* Class RcvBuffer: maintains information about what packets were received,
* and keeps track of gaps in packet sequence number.
*
* Christos Papadopoulos
*/
#ifndef RCVBUF_H_
#define RCVBUF_H_
class Gap;
class RcvBuffer {
public:
RcvBuffer ();
// ~RcvBuffer ();
void add_pkt (int, double); // add packet with seq num n, received at time t
int exists_pkt (int); // query the existence of packet n
void print ();
int nextpkt_; // seq num of the next expected packet
int maxpkt_; // packets received without gap
int pkts_recovered_; // total number of recovered packets
int duplicates_; // duplicate packets
double delay_sum_; // total delay to recover lost packets
double max_delay_; // max recovery delay
double min_delay_; // min recovery delay
protected:
Gap *gap_;
Gap *tail_;
};
//
// Class Gap: identifies a gap
// in packet reception sequence number
//
class Gap {
public:
int start_;
int end_;
double time_;
Gap *next_;
};
#endif
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