/* -*-  Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */

/*

 * Copyright (c) 2006 INRIA

 * All rights reserved.

 *

 * 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

 *

 * Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>

 */

#ifndef ARP_H

#define ARP_H

#include <list>

#include "l3-protocol.h"

namespace ns3 {

class ArpCache;

class NetDevice;

class Node;

class Packet;

class TraceResolver;

class TraceContext;

class Arp : public L3Protocol

{

public:

  static const uint16_t PROT_NUMBER;

  Arp (Node *node);

  ~Arp ();

  virtual TraceResolver *CreateTraceResolver (TraceContext const &context);

  virtual void Receive(Packet& p, NetDevice *device);

  bool Lookup (Packet &p, Ipv4Address destination, 

	       NetDevice *device,

	       MacAddress *hardwareDestination);

protected:

  virtual void DoDispose (void);

private:

  typedef std::list<ArpCache *> CacheList;

  ArpCache *FindCache (NetDevice *device);

  void SendArpRequest (ArpCache const *cache, Ipv4Address to);

  void SendArpReply (ArpCache const *cache, Ipv4Address toIp, MacAddress toMac);

  CacheList m_cacheList;

  Node *m_node;

};

}//namespace ns3

#endif /* ARP_H */