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

/*

 * Copyright (c) 2005 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>

 */

#include "ns3/log.h"

#include "ipv4-address.h"

#include "ns3/assert.h"

NS_LOG_COMPONENT_DEFINE("Ipv4Address");

namespace ns3 {

#define ASCII_DOT (0x2e)

#define ASCII_ZERO (0x30)

static uint32_t 

AsciiToIpv4Host (char const *address)

{

  uint32_t host = 0;

  while (true) {

    uint8_t byte = 0;

    while (*address != ASCII_DOT &&

           *address != 0) {

      byte *= 10;

      byte += *address - ASCII_ZERO;

      address++;

    }

    host <<= 8;

    host |= byte;

    if (*address == 0) {

      break;

    }

    address++;

  }

  return host;

}

}//namespace ns3

namespace ns3 {

Ipv4Mask::Ipv4Mask ()

  : m_mask (0x66666666)

{}

Ipv4Mask::Ipv4Mask (uint32_t mask)

  : m_mask (mask)

{}

Ipv4Mask::Ipv4Mask (char const *mask)

{

  m_mask = AsciiToIpv4Host (mask);

}

bool 

Ipv4Mask::IsEqual (Ipv4Mask other) const

{

  if (other.m_mask == m_mask) {

    return true;

  } else {

    return false;

  }

}

bool 

Ipv4Mask::IsMatch (Ipv4Address a, Ipv4Address b) const

{

  if ((a.GetHostOrder () & m_mask) == (b.GetHostOrder () & m_mask)) {

    return true;

  } else {

    return false;

  }

}

uint32_t 

Ipv4Mask::GetHostOrder (void) const

{

  return m_mask;

}

void 

Ipv4Mask::SetHostOrder (uint32_t value)

{

  m_mask = value;

}

uint32_t 

Ipv4Mask::GetInverse (void) const

{

  return ~m_mask;

}

void 

Ipv4Mask::Print (std::ostream &os) const

{

  os << ((m_mask >> 24) & 0xff) << "."

     << ((m_mask >> 16) & 0xff) << "."

     << ((m_mask >> 8) & 0xff) << "."

     << ((m_mask >> 0) & 0xff);

}

Ipv4Mask

Ipv4Mask::GetLoopback (void)

{

  static Ipv4Mask loopback = Ipv4Mask ("255.0.0.0");

  return loopback;

}

Ipv4Mask

Ipv4Mask::GetZero (void)

{

  static Ipv4Mask zero = Ipv4Mask ("0.0.0.0");

  return zero;

}

Ipv4Address::Ipv4Address ()

  : m_address (0x66666666)

{}

Ipv4Address::Ipv4Address (uint32_t address)

{

  m_address = address;

}

Ipv4Address::Ipv4Address (char const *address)

{

  m_address = AsciiToIpv4Host (address);

}

void

Ipv4Address::Set (uint32_t address)

{

  m_address = address;

}

void

Ipv4Address::Set (char const *address)

{

  m_address = AsciiToIpv4Host (address);

}

Ipv4Address

Ipv4Address::CombineMask (Ipv4Mask const &mask) const

{

  return Ipv4Address (GetHostOrder () & mask.GetHostOrder ());

}

Ipv4Address 

Ipv4Address::GetSubnetDirectedBroadcast (Ipv4Mask const &mask) const

{

  return Ipv4Address (GetHostOrder () | mask.GetInverse ());

}

bool

Ipv4Address::IsSubnetDirectedBroadcast (Ipv4Mask const &mask) const

{

  return ( (GetHostOrder () | mask.GetInverse ()) == GetHostOrder () );

}

bool

Ipv4Address::IsBroadcast (void) const

{

  return (m_address == 0xffffffffU);

}

bool 

Ipv4Address::IsMulticast (void) const

{

//

// Multicast addresses are defined as ranging from 224.0.0.0 through 

// 239.255.255.255 (which is E0000000 through EFFFFFFF in hex).

//

  return (m_address >= 0xe0000000 && m_address <= 0xefffffff);

}

uint32_t

Ipv4Address::GetHostOrder (void) const

{

  return m_address;

}

void 

Ipv4Address::SetHostOrder (uint32_t ip)

{

  m_address = ip;

}

void

Ipv4Address::Serialize (uint8_t buf[4]) const

{

  buf[0] = (m_address >> 24) & 0xff;

  buf[1] = (m_address >> 16) & 0xff;

  buf[2] = (m_address >> 8) & 0xff;

  buf[3] = (m_address >> 0) & 0xff;

}

Ipv4Address 

Ipv4Address::Deserialize (const uint8_t buf[4])

{

  Ipv4Address ipv4;

  ipv4.m_address = 0;

  ipv4.m_address |= buf[0];

  ipv4.m_address <<= 8;

  ipv4.m_address |= buf[1];

  ipv4.m_address <<= 8;

  ipv4.m_address |= buf[2];

  ipv4.m_address <<= 8;

  ipv4.m_address |= buf[3];

  return ipv4;

}

void 

Ipv4Address::Print (std::ostream &os) const

{

  os << ((m_address >> 24) & 0xff) << "."

     << ((m_address >> 16) & 0xff) << "."

     << ((m_address >> 8) & 0xff) << "."

     << ((m_address >> 0) & 0xff);

}

bool 

Ipv4Address::IsMatchingType (const Address &address)

{

  return address.CheckCompatible (GetType (), 4);

}

Ipv4Address::operator Address () const

{

  return ConvertTo ();

}

Address 

Ipv4Address::ConvertTo (void) const

{

  uint8_t buf[4];

  Serialize (buf);

  return Address (GetType (), buf, 4);

}

Ipv4Address

Ipv4Address::ConvertFrom (const Address &address)

{

  NS_ASSERT (address.CheckCompatible (GetType (), 4));

  uint8_t buf[4];

  address.CopyTo (buf);

  return Deserialize (buf);

}

uint8_t 

Ipv4Address::GetType (void)

{

  static uint8_t type = Address::Register ();

  return type;

}

Ipv4Address 

Ipv4Address::GetZero (void)

{

  static Ipv4Address zero ("0.0.0.0");

  return zero;

}

Ipv4Address 

Ipv4Address::GetAny (void)

{

  static Ipv4Address any ("0.0.0.0");

  return any;

}

Ipv4Address 

Ipv4Address::GetBroadcast (void)

{

  static Ipv4Address broadcast ("255.255.255.255");

  return broadcast;

}

Ipv4Address 

Ipv4Address::GetLoopback (void)

{

  Ipv4Address loopback ("127.0.0.1");

  return loopback;

}

size_t Ipv4AddressHash::operator()(Ipv4Address const &x) const 

{ 

  return x.GetHostOrder ();

}

std::ostream& operator<< (std::ostream& os, Ipv4Address const& address)

{

  address.Print (os);

  return os;

}

std::ostream& operator<< (std::ostream& os, Ipv4Mask const& mask)

{

  mask.Print (os);

  return os;

}

std::istream & operator >> (std::istream &is, Ipv4Address &address)

{

  std::string str;

  is >> str;

  return is;

}

std::istream & operator >> (std::istream &is, Ipv4Mask &mask)

{

  std::string str;

  is >> str;

  return is;

}

bool operator == (Ipv4Mask const &a, Ipv4Mask const &b)

{

  return a.IsEqual (b);

}

bool operator != (Ipv4Mask const &a, Ipv4Mask const &b)

{

  return !a.IsEqual (b);

}

VALUE_HELPER_CPP (Ipv4Address);

VALUE_HELPER_CPP (Ipv4Mask);

} // namespace ns3