dhcp-header.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_HEADER_H
#define DHCP_HEADER_H

#include "ns3/header.h"
#include <ns3/mac48-address.h>
#include <ns3/mac64-address.h>

namespace ns3 {

class DhcpHeader : public Header
{
public:
  static TypeId GetTypeId (void);

  DhcpHeader ();

  ~DhcpHeader ();

  enum Options
  {
    OP_MASK = 1,        
    OP_ROUTE = 3,       
    OP_ADDREQ = 50,     
    OP_LEASE = 51,      
    OP_MSGTYPE = 53,    
    OP_SERVID = 54,     
    OP_RENEW = 58,      
    OP_REBIND = 59,     
    OP_END = 255        
  };

  enum Messages
  {
    DHCPDISCOVER = 0,     
    DHCPOFFER = 1,        
    DHCPREQ = 2,          
    DHCPACK = 4,          
    DHCPNACK = 5          
  };

  void SetType (uint8_t type);

  uint8_t GetType (void) const;

  void SetHWType (uint8_t htype, uint8_t hlen);

  void SetTran (uint32_t tran);

  uint32_t GetTran (void) const;

  void SetTime ();

  void SetChaddr (Address addr);

  void SetChaddr (uint8_t* addr, uint8_t len);

  Address GetChaddr (void);

  void SetYiaddr (Ipv4Address addr);

  Ipv4Address GetYiaddr (void) const;

  void SetDhcps (Ipv4Address addr);

  Ipv4Address GetDhcps (void) const;

  void SetReq (Ipv4Address addr);

  Ipv4Address GetReq (void) const;

  void SetMask (uint32_t addr);

  uint32_t GetMask (void) const;

  void SetRouter (Ipv4Address addr);

  Ipv4Address GetRouter (void) const;

  void SetLease (uint32_t time);

  uint32_t GetLease (void) const;

  void SetRenew (uint32_t time);

  uint32_t GetRenew (void) const;

  void SetRebind (uint32_t time);

  uint32_t GetRebind (void) const;

  void ResetOpt ();

private:
  virtual TypeId GetInstanceTypeId (void) const;
  virtual void Print (std::ostream &os) const;
  virtual uint32_t GetSerializedSize (void) const;
  virtual void Serialize (Buffer::Iterator start) const;
  virtual uint32_t Deserialize (Buffer::Iterator start);

  uint8_t m_op;                          
  uint8_t m_bootp;                       
  uint8_t m_hType;                       
  uint8_t m_hLen;                        
  uint8_t m_hops;                        
  uint32_t m_xid;                        
  uint32_t m_mask;                       
  uint32_t m_len;                        
  uint16_t m_secs;                       
  uint16_t m_flags;                      
  uint8_t m_chaddr[16];                  
  Ipv4Address m_yiAddr;                  
  Ipv4Address m_ciAddr;                  
  Ipv4Address m_siAddr;                  
  Ipv4Address m_giAddr;                  
  Ipv4Address m_dhcps;                   
  Ipv4Address m_req;                     
  Ipv4Address m_route;                   
  uint8_t m_sname[64];                   
  uint8_t m_file[128];                   
  uint8_t m_magic_cookie[4];             
  uint32_t m_lease;                      
  uint32_t m_renew;                      
  uint32_t m_rebind;                     
  bool m_opt[255];                       
};

} // namespace ns3

#endif /* DHCP_HEADER_H */