rcvbuf.h
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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