dhcp-client.h

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/*
 * 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 "dhcp-header.h"
 
#include "ns3/application.h"
#include "ns3/traced-value.h"
 
#include <list>
 
namespace ns3
{
 
class Socket;
class Packet;
class RandomVariableStream;
 
class DhcpClient : public Application
{
  public:
    static TypeId GetTypeId();
 
    DhcpClient();
    ~DhcpClient() override;
 
    DhcpClient(Ptr<NetDevice> netDevice);
 
    Ptr<NetDevice> GetDhcpClientNetDevice();
 
    void SetDhcpClientNetDevice(Ptr<NetDevice> netDevice);
 
    Ipv4Address GetDhcpServer();
 
    int64_t AssignStreams(int64_t stream);
 
  protected:
    void DoDispose() override;
 
  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
     */
    void StartApplication() override;
 
    /*
     * \brief Stops the DHCP client application
     */
    void StopApplication() override;
 
    void LinkStateHandler();
 
    void NetHandler(Ptr<Socket> socket);
 
    void Boot();
 
    void OfferHandler(DhcpHeader header);
 
    void Select();
 
    void Request();
 
    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 */