dhcp-client.h

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/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
 * Copyright (c) 2011 UPB
 * Copyright (c) 2017 NITK Surathkal
 *
 * 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: Radu Lupu <rlupu@elcom.pub.ro>
 *         Ankit Deepak <adadeepak8@gmail.com>
 *         Deepti Rajagopal <deeptir96@gmail.com>
 *
 */

#ifndef DHCP_CLIENT_H
#define DHCP_CLIENT_H

#include "ns3/application.h"
#include "ns3/traced-value.h"
#include "dhcp-header.h"
#include <list>

namespace ns3 {

class Socket;
class Packet;
class RandomVariableStream;

class DhcpClient : public Application
{
public:
  static TypeId
  GetTypeId (void);

  DhcpClient ();
  virtual ~DhcpClient ();

  DhcpClient (Ptr<NetDevice> netDevice);

  Ptr<NetDevice> GetDhcpClientNetDevice (void);

  void SetDhcpClientNetDevice (Ptr<NetDevice> netDevice);

  Ipv4Address GetDhcpServer (void);

  int64_t AssignStreams (int64_t stream);

protected:
  virtual void DoDispose (void);

private:
  enum States
  {
    WAIT_OFFER = 1,             
    REFRESH_LEASE = 2,          
    WAIT_ACK = 9                
  };

  static const int DHCP_PEER_PORT = 67; 

  /*
   * \brief Starts the DHCP client application
   */
  virtual void StartApplication (void);

  /*
   * \brief Stops the DHCP client application
   */
  virtual void StopApplication (void);

  void LinkStateHandler (void);

  void NetHandler (Ptr<Socket> socket);

  void Boot (void);

  void OfferHandler (DhcpHeader header);

  void Select (void);

  void Request (void);

  void AcceptAck (DhcpHeader header, Address from);

  void RemoveAndStart ();

  uint8_t m_state;                       
  bool m_firstBoot;                      
  Ptr<NetDevice> m_device;               
  Ptr<Socket> m_socket;                  
  Ipv4Address m_remoteAddress;           
  Ipv4Address m_offeredAddress;          
  Ipv4Address m_myAddress;               
  Address m_chaddr;                      
  Ipv4Mask m_myMask;                     
  Ipv4Address m_server;                  
  Ipv4Address m_gateway;                 
  EventId m_requestEvent;                
  EventId m_discoverEvent;               
  EventId m_refreshEvent;                
  EventId m_rebindEvent;                 
  EventId m_nextOfferEvent;              
  EventId m_timeout;                     
  EventId m_collectEvent;                
  Time m_lease;                          
  Time m_renew;                          
  Time m_rebind;                         
  Time m_nextoffer;                      
  Ptr<RandomVariableStream> m_ran;       
  Time m_rtrs;                           
  Time m_collect;                        
  bool m_offered;                        
  std::list<DhcpHeader> m_offerList;     
  uint32_t m_tran;                       
  TracedCallback<const Ipv4Address&> m_newLease;
  TracedCallback<const Ipv4Address&> m_expiry;  
};

} // namespace ns3

#endif /* DHCP_CLIENT_H */