00001 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */ 00002 /* 00003 * Copyright (c) 2007 University of Washington 00004 * 00005 * This program is free software; you can redistribute it and/or modify 00006 * it under the terms of the GNU General Public License version 2 as 00007 * published by the Free Software Foundation; 00008 * 00009 * This program is distributed in the hope that it will be useful, 00010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 * GNU General Public License for more details. 00013 * 00014 * You should have received a copy of the GNU General Public License 00015 * along with this program; if not, write to the Free Software 00016 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00017 */ 00018 00019 #ifndef DROPTAIL_H 00020 #define DROPTAIL_H 00021 00022 #include <queue> 00023 #include "ns3/packet.h" 00024 #include "ns3/queue.h" 00025 00026 namespace ns3 { 00027 00028 class TraceContainer; 00029 00030 /** 00031 * \ingroup queue 00032 * 00033 * \brief A FIFO packet queue that drops tail-end packets on overflow 00034 */ 00035 class DropTailQueue : public Queue { 00036 public: 00037 static TypeId GetTypeId (void); 00038 /** 00039 * \brief DropTailQueue Constructor 00040 * 00041 * Creates a droptail queue with a maximum size of 100 packets by default 00042 */ 00043 DropTailQueue (); 00044 00045 virtual ~DropTailQueue(); 00046 00047 private: 00048 virtual bool DoEnqueue (Ptr<Packet> p); 00049 virtual Ptr<Packet> DoDequeue (void); 00050 virtual Ptr<const Packet> DoPeek (void) const; 00051 00052 private: 00053 std::queue<Ptr<Packet> > m_packets; 00054 uint32_t m_maxPackets; 00055 }; 00056 00057 }; // namespace ns3 00058 00059 #endif /* DROPTAIL_H */