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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2011-2014 ZeroTier Networks LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* 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, see <http://www.gnu.org/licenses/>.
*
* --
*
* ZeroTier may be used and distributed under the terms of the GPLv3, which
* are available at: http://www.gnu.org/licenses/gpl-3.0.html
*
* If you would like to embed ZeroTier into a commercial application or
* redistribute it in a modified binary form, please contact ZeroTier Networks
* LLC. Start here: http://www.zerotier.com/
*/
#ifndef ZT_MAC_HPP
#define ZT_MAC_HPP
#include <stdio.h>
#include <stdlib.h>
#include "Constants.hpp"
#include "Array.hpp"
#include "Utils.hpp"
namespace ZeroTier {
/**
* An Ethernet MAC address
*/
class MAC : public Array<unsigned char,6>
{
public:
/**
* Create a zero/null MAC
*/
MAC()
throw()
{
for(unsigned int i=0;i<6;++i)
data[i] = 0;
}
/**
* Create a MAC consisting of only this octet
*
* @param octet Octet to fill MAC with (e.g. 0xff for broadcast-all)
*/
MAC(const unsigned char octet)
throw()
{
for(unsigned int i=0;i<6;++i)
data[i] = octet;
}
/**
* Create a MAC from raw bits
*
* @param bits 6 bytes of MAC address data
*/
MAC(const void *bits)
throw()
{
for(unsigned int i=0;i<6;++i)
data[i] = ((const unsigned char *)bits)[i];
}
/**
* @return True if non-NULL (not all zero)
*/
inline operator bool() const
throw()
{
for(unsigned int i=0;i<6;++i) {
if (data[i])
return true;
}
return false;
}
/**
* @return True if this is the broadcast-all MAC (0xff:0xff:...)
*/
inline bool isBroadcast() const
throw()
{
for(unsigned int i=0;i<6;++i) {
if (data[i] != 0xff)
return false;
}
return true;
}
/**
* @return True if this is a multicast/broadcast address
*/
inline bool isMulticast() const
throw()
{
return ((data[0] & 1));
}
/**
* @return True if this is a ZeroTier unicast MAC
*/
inline bool isZeroTier() const
throw()
{
return (data[0] == ZT_MAC_FIRST_OCTET);
}
/**
* Zero this MAC
*/
inline void zero()
throw()
{
for(unsigned int i=0;i<6;++i)
data[i] = 0;
}
/**
* @param s String hex representation (with or without :'s)
* @return True if string decoded into a full-length MAC
*/
inline void fromString(const char *s)
{
Utils::unhex(s,data,6);
}
/**
* @return MAC address in standard :-delimited hex format
*/
inline std::string toString() const
{
char tmp[32];
Utils::snprintf(tmp,sizeof(tmp),"%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",(int)data[0],(int)data[1],(int)data[2],(int)data[3],(int)data[4],(int)data[5]);
return std::string(tmp);
}
};
} // namespace ZeroTier
#endif
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