/* -*-	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 <iostream>

#include <iomanip>

#include "ns3/assert.h"

#include "mac-address.h"

#define ASCII_a (0x41)

#define ASCII_z (0x5a)

#define ASCII_A (0x61)

#define ASCII_Z (0x7a)

#define ASCII_COLON (0x3a)

#define ASCII_ZERO (0x30)

namespace ns3 {

static char

AsciiToLowCase (char c)

{

  if (c >= ASCII_a && c <= ASCII_z) {

    return c;

  } else if (c >= ASCII_A && c <= ASCII_Z) {

    return c + (ASCII_a - ASCII_A);

  } else {

    return c;

  }

}

MacAddress::MacAddress () : m_len(0)

{

  for (int i=0; i < MacAddress::MAX_LEN; i++) 

    {

      m_address[i] = 0;

    }

}

MacAddress::MacAddress (uint8_t const *address, uint8_t len)

{

  NS_ASSERT (len <= MacAddress::MAX_LEN);

  for (int i=0; i < len; i++) 

    {

      m_address[i] = address[i];

    }

  for (int i=len; i < MacAddress::MAX_LEN; i++) 

    {

      m_address[i] = 0;

    } 

  m_len = len;

}

MacAddress::MacAddress (char const *str)

{       

  int i = 0;

  while (*str != 0 && i < MacAddress::MAX_LEN) {

    uint8_t byte = 0;

    while (*str != ASCII_COLON && *str != 0) {

      byte <<= 4;

      char low = AsciiToLowCase (*str);

      if (low >= ASCII_a) {

        byte |= low - ASCII_a + 10;

      } else {

        byte |= low - ASCII_ZERO;

      }

      str++;

    }

    m_address[i] = byte;

    i++;

    if (*str == 0) {

      break;

    }

    str++;

  }

  m_len = i;

}

MacAddress::~MacAddress ()

{}

bool 

MacAddress::IsEqual (MacAddress other) const

{

    if (memcmp(other.m_address, m_address, m_len)) 

      {

        return false;

      } 

    else 

      {

        return true;

      } 

}

void

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

{

    int i;

    if (m_len == 0) 

      {

        os << "NULL-ADDRESS";

        return;

      }

    os.setf (std::ios::hex, std::ios::basefield);

    std::cout.fill('0');

    for (i=0; i< (m_len-1); i++) 

      {

	os << std::setw(2) << (uint32_t)m_address[i] << ":";

      }

    // Final byte not suffixed by ":"

    os << std::setw(2) << (uint32_t)m_address[i];

    os.setf (std::ios::dec, std::ios::basefield);

    std::cout.fill(' ');

}

uint8_t

MacAddress::GetLength () const

{

    return m_len;

}

void

MacAddress::Peek (uint8_t ad[MacAddress::MAX_LEN]) const

{

	memcpy (ad, m_address, MacAddress::MAX_LEN);

}

void

MacAddress::Set (uint8_t const ad[MacAddress::MAX_LEN], uint8_t len)

{

	memcpy (m_address, ad, MacAddress::MAX_LEN);

        m_len = len;

}

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

{

	return a.IsEqual (b);

}

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

{

	return !a.IsEqual (b);

}

bool operator < (MacAddress const&a, MacAddress const&b)

{

        uint8_t a_p[MacAddress::MAX_LEN];

        uint8_t b_p[MacAddress::MAX_LEN];

        a.Peek (a_p);

        b.Peek (b_p);

        NS_ASSERT (a.GetLength() == b.GetLength());

        for (uint8_t i = 0; i < a.GetLength(); i++) 

          {

            if (a_p[i] < b_p[i]) 

              {

                return true;

              } 

            else if (a_p[i] > b_p[i]) 

              {

                return false;

              }

          }

        return false;

}

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

{

	address.Print (os);

	return os;

}

}; // namespace ns3