311 lines
6.9 KiB
C++
311 lines
6.9 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2007 INRIA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#include "mac48-address.h"
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#include "address.h"
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#include "ns3/assert.h"
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#include <iomanip>
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#include <iostream>
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#include <string.h>
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namespace ns3 {
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ATTRIBUTE_HELPER_CPP (Mac48Address);
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#define ASCII_a (0x41)
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#define ASCII_z (0x5a)
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#define ASCII_A (0x61)
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#define ASCII_Z (0x7a)
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#define ASCII_COLON (0x3a)
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#define ASCII_ZERO (0x30)
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static char
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AsciiToLowCase (char c)
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{
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if (c >= ASCII_a && c <= ASCII_z) {
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return c;
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} else if (c >= ASCII_A && c <= ASCII_Z) {
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return c + (ASCII_a - ASCII_A);
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} else {
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return c;
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}
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}
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Mac48Address::Mac48Address ()
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{
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memset (m_address, 0, 6);
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}
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Mac48Address::Mac48Address (const char *str)
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{
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int i = 0;
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while (*str != 0 && i < 6)
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{
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uint8_t byte = 0;
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while (*str != ASCII_COLON && *str != 0)
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{
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byte <<= 4;
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char low = AsciiToLowCase (*str);
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if (low >= ASCII_a)
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{
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byte |= low - ASCII_a + 10;
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}
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else
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{
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byte |= low - ASCII_ZERO;
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}
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str++;
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}
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m_address[i] = byte;
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i++;
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if (*str == 0)
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{
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break;
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}
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str++;
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}
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NS_ASSERT (i == 6);
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}
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void
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Mac48Address::CopyFrom (const uint8_t buffer[6])
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{
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memcpy (m_address, buffer, 6);
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}
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void
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Mac48Address::CopyTo (uint8_t buffer[6]) const
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{
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memcpy (buffer, m_address, 6);
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}
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bool
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Mac48Address::IsMatchingType (const Address &address)
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{
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return address.CheckCompatible (GetType (), 6);
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}
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Mac48Address::operator Address () const
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{
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return ConvertTo ();
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}
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Address
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Mac48Address::ConvertTo (void) const
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{
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return Address (GetType (), m_address, 6);
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}
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Mac48Address
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Mac48Address::ConvertFrom (const Address &address)
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{
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NS_ASSERT (address.CheckCompatible (GetType (), 6));
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Mac48Address retval;
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address.CopyTo (retval.m_address);
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return retval;
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}
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Mac48Address
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Mac48Address::Allocate (void)
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{
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static uint64_t id = 0;
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id++;
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Mac48Address address;
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address.m_address[0] = (id >> 40) & 0xff;
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address.m_address[1] = (id >> 32) & 0xff;
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address.m_address[2] = (id >> 24) & 0xff;
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address.m_address[3] = (id >> 16) & 0xff;
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address.m_address[4] = (id >> 8) & 0xff;
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address.m_address[5] = (id >> 0) & 0xff;
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return address;
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}
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uint8_t
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Mac48Address::GetType (void)
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{
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static uint8_t type = Address::Register ();
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return type;
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}
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bool
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Mac48Address::IsBroadcast (void) const
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{
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return *this == GetBroadcast ();
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}
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bool
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Mac48Address::IsGroup (void) const
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{
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return (m_address[0] & 0x01) == 0x01;
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}
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Mac48Address
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Mac48Address::GetBroadcast (void)
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{
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static Mac48Address broadcast = Mac48Address ("ff:ff:ff:ff:ff:ff");
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return broadcast;
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}
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Mac48Address
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Mac48Address::GetMulticastPrefix (void)
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{
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static Mac48Address multicast = Mac48Address ("01:00:5e:00:00:00");
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return multicast;
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}
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Mac48Address
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Mac48Address::GetMulticast6Prefix (void)
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{
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static Mac48Address multicast = Mac48Address ("33:33:00:00:00:00");
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return multicast;
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}
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Mac48Address
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Mac48Address::GetMulticast (Ipv4Address multicastGroup)
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{
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Mac48Address etherAddr = Mac48Address::GetMulticastPrefix ();
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//
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// We now have the multicast address in an abstract 48-bit container. We
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// need to pull it out so we can play with it. When we're done, we have the
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// high order bits in etherBuffer[0], etc.
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//
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uint8_t etherBuffer[6];
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etherAddr.CopyTo (etherBuffer);
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//
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// Now we need to pull the raw bits out of the Ipv4 destination address.
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//
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uint8_t ipBuffer[4];
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multicastGroup.Serialize (ipBuffer);
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//
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// RFC 1112 says that an Ipv4 host group address is mapped to an EUI-48
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// multicast address by placing the low-order 23-bits of the IP address into
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// the low-order 23 bits of the Ethernet multicast address
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// 01-00-5E-00-00-00 (hex).
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//
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etherBuffer[3] |= ipBuffer[1] & 0x7f;
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etherBuffer[4] = ipBuffer[2];
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etherBuffer[5] = ipBuffer[3];
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//
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// Now, etherBuffer has the desired ethernet multicast address. We have to
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// suck these bits back into the Mac48Address,
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//
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Mac48Address result;
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result.CopyFrom (etherBuffer);
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return result;
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}
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Mac48Address Mac48Address::GetMulticast(Ipv6Address addr)
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{
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Mac48Address etherAddr = Mac48Address::GetMulticast6Prefix();
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uint8_t etherBuffer[6];
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uint8_t ipBuffer[16];
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/* a MAC multicast IPv6 address is like 33:33 and the four low bytes */
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/* for 2001:db8::2fff:fe11:ac10 => 33:33:FE:11:AC:10 */
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etherAddr.CopyTo (etherBuffer);
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addr.Serialize (ipBuffer);
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etherBuffer[2] = ipBuffer[12];
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etherBuffer[3] = ipBuffer[13];
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etherBuffer[4] = ipBuffer[14];
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etherBuffer[5] = ipBuffer[15];
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etherAddr.CopyFrom (etherBuffer);
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return etherAddr;
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}
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bool operator == (const Mac48Address &a, const Mac48Address &b)
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{
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return memcmp (a.m_address, b.m_address, 6) == 0;
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}
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bool operator != (const Mac48Address &a, const Mac48Address &b)
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{
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return ! (a == b);
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}
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bool operator < (const Mac48Address &a, const Mac48Address &b)
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{
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uint8_t aP[6];
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uint8_t bP[6];
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a.CopyTo (aP);
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b.CopyTo (bP);
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for (uint8_t i = 0; i < 6; i++)
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{
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if (a.m_address[i] < b.m_address[i])
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{
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return true;
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}
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else if (a.m_address[i] > b.m_address[i])
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{
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return false;
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}
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}
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return false;
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}
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std::ostream& operator<< (std::ostream& os, const Mac48Address & address)
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{
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uint8_t ad[6];
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address.CopyTo (ad);
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os.setf (std::ios::hex, std::ios::basefield);
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os.fill('0');
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for (uint8_t i=0; i < 5; i++)
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{
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os << std::setw(2) << (uint32_t)ad[i] << ":";
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}
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// Final byte not suffixed by ":"
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os << std::setw(2) << (uint32_t)ad[5];
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os.setf (std::ios::dec, std::ios::basefield);
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os.fill(' ');
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return os;
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}
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static uint8_t
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AsInt (std::string v)
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{
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std::istringstream iss;
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iss.str (v);
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uint32_t retval;
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iss >> std::hex >> retval >> std::dec;
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return retval;
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}
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std::istream& operator>> (std::istream& is, Mac48Address & address)
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{
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std::string v;
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is >> v;
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std::string::size_type col = 0;
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for (uint8_t i = 0; i < 6; ++i)
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{
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std::string tmp;
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std::string::size_type next;
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next = v.find (":", col);
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if (next == std::string::npos)
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{
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tmp = v.substr (col, v.size ()-col);
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address.m_address[i] = AsInt (tmp);
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break;
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}
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else
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{
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tmp = v.substr (col, next-col);
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address.m_address[i] = AsInt (tmp);
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col = next + 1;
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}
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}
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return is;
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}
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} // namespace ns3
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