/* * requesttable.h * Copyright (C) 2000 by the University of Southern California * $Id: requesttable.h,v 1.4 2005/08/25 18:58:05 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. * */// Other copyrights might apply to parts of this software and are so// noted when applicable.//// Ported from CMU/Monarch's code, appropriate copyright applies.  /* -*- c++ -*-   requesttable.h   implement a table to keep track of the most current request   number we've heard from a node in terms of that node's id   implemented as a circular buffer*/#ifndef _requesttable_h#define _requesttable_h#include "path.h"struct Entry;enum LastType { LIMIT0, UNLIMIT};class RequestTable {public:  RequestTable(int size = 30);  ~RequestTable();  void insert(const ID& net_id, int req_num);  void insert(const ID& net_id, const ID& MAC_id, int req_num);  int get(const ID& id) const;  // rtns 0 if id not found  Entry* getEntry(const ID& id);  private:  Entry *table;  int size;  int ptr;  int find(const ID& net_id, const ID& MAC_id ) const;};struct Entry {  ID MAC_id;  ID net_id;  int req_num;  Time last_arp;  int rt_reqs_outstanding;  Time last_rt_req;  LastType last_type;};#endif //_requesttable_h