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/*
* ZeroTier One - Global Peer to Peer Ethernet
* Copyright (C) 2012-2013 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_ADDRESS_HPP
#define _ZT_ADDRESS_HPP
#include <stdint.h>
#include <string>
#include "Utils.hpp"
#include "MAC.hpp"
#include "Constants.hpp"
namespace ZeroTier {
/**
* ZeroTier address, which doubles as the last 5 octets of the MAC on taps
*
* Natural sort order will differ on big vs. little endian machines, but that
* won't matter when it's used as a local map/set key.
*/
class Address
{
private:
union {
unsigned char o[ZT_ADDRESS_LENGTH];
uint64_t v;
} _a;
public:
Address()
throw()
{
_a.v = 0;
}
Address(const Address &a)
throw()
{
_a.v = a._a.v;
}
/**
* Create from a ZeroTier MAC
*
* @param m MAC (assumed to be a ZeroTier MAC)
*/
Address(const MAC &m)
throw()
{
_a.v = 0;
for(int i=0;i<ZT_ADDRESS_LENGTH;++i)
_a.o[i] = m.data[i + 1];
}
/**
* @param bits Raw address -- 5 bytes in length
*/
Address(const void *bits)
throw()
{
_a.v = 0;
for(int i=0;i<ZT_ADDRESS_LENGTH;++i)
_a.o[i] = ((const unsigned char *)bits)[i];
}
inline Address &operator=(const Address &a)
throw()
{
_a.v = a._a.v;
return *this;
}
/**
* Derive a MAC whose first octet is the ZeroTier LAN standard
*
* @return Ethernet MAC derived from address
*/
inline MAC toMAC() const
throw()
{
MAC m;
m.data[0] = ZT_MAC_FIRST_OCTET;
for(int i=1;i<6;++i)
m.data[i] = _a.o[i - 1];
return m;
}
/**
* @return Hexadecimal string
*/
inline std::string toString() const
{
return Utils::hex(_a.o,ZT_ADDRESS_LENGTH);
};
/**
* Set address to zero
*/
inline void zero() throw() { _a.v = 0; }
/**
* @return True if this address is not zero
*/
inline operator bool() const throw() { return (_a.v); }
/**
* @return Sum of all bytes in address
*/
inline unsigned int sum() const
throw()
{
unsigned int s = 0;
for(unsigned int i=0;i<ZT_ADDRESS_LENGTH;++i)
s += _a.o[i];
return s;
}
/**
* Check if this address is reserved
*
* The all-zero null address and any address beginning with 0xff are
* reserved. (0xff is reserved for future use to designate possibly
* longer addresses, addresses based on IPv6 innards, etc.)
*
* @return True if address is reserved and may not be used
*/
inline bool isReserved() const
throw()
{
return ((!_a.v)||(_a.o[0] == ZT_ADDRESS_RESERVED_PREFIX));
}
inline unsigned char *data() throw() { return _a.o; }
inline const unsigned char *data() const throw() { return _a.o; }
inline unsigned int size() const throw() { return ZT_ADDRESS_LENGTH; }
inline unsigned char &operator[](unsigned int i) throw() { return _a.o[i]; }
inline unsigned char operator[](unsigned int i) const throw() { return _a.o[i]; }
inline bool operator==(const Address &a) const throw() { return (_a.v == a._a.v); }
inline bool operator!=(const Address &a) const throw() { return (_a.v != a._a.v); }
inline bool operator<(const Address &a) const throw() { return (_a.v < a._a.v); }
inline bool operator>(const Address &a) const throw() { return (_a.v > a._a.v); }
inline bool operator<=(const Address &a) const throw() { return (_a.v <= a._a.v); }
inline bool operator>=(const Address &a) const throw() { return (_a.v >= a._a.v); }
};
} // namespace ZeroTier
#endif
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