New git repository for release - version 0.2.0 tagged
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node/Address.hpp
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node/Address.hpp
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/*
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* ZeroTier One - Global Peer to Peer Ethernet
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* Copyright (C) 2012-2013 ZeroTier Networks LLC
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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 as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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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, see <http://www.gnu.org/licenses/>.
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*
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* --
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*
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* ZeroTier may be used and distributed under the terms of the GPLv3, which
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* are available at: http://www.gnu.org/licenses/gpl-3.0.html
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*
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* If you would like to embed ZeroTier into a commercial application or
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* redistribute it in a modified binary form, please contact ZeroTier Networks
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* LLC. Start here: http://www.zerotier.com/
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*/
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#ifndef _ZT_ADDRESS_HPP
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#define _ZT_ADDRESS_HPP
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#include <stdint.h>
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#include <string>
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#include "Utils.hpp"
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#include "MAC.hpp"
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#include "Constants.hpp"
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namespace ZeroTier {
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/**
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* ZeroTier address, which doubles as the last 5 octets of the MAC on taps
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*
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* Natural sort order will differ on big vs. little endian machines, but that
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* won't matter when it's used as a local map/set key.
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*/
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class Address
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{
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private:
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union {
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unsigned char o[ZT_ADDRESS_LENGTH];
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uint64_t v;
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} _a;
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public:
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Address()
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throw()
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{
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_a.v = 0;
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}
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Address(const Address &a)
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throw()
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{
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_a.v = a._a.v;
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}
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/**
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* Create from a ZeroTier MAC
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*
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* @param m MAC (assumed to be a ZeroTier MAC)
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*/
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Address(const MAC &m)
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throw()
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{
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_a.v = 0;
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for(int i=0;i<ZT_ADDRESS_LENGTH;++i)
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_a.o[i] = m.data[i + 1];
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}
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/**
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* @param bits Raw address -- 5 bytes in length
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*/
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Address(const void *bits)
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throw()
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{
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_a.v = 0;
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for(int i=0;i<ZT_ADDRESS_LENGTH;++i)
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_a.o[i] = ((const unsigned char *)bits)[i];
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}
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inline Address &operator=(const Address &a)
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throw()
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{
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_a.v = a._a.v;
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return *this;
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}
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/**
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* Derive a MAC whose first octet is the ZeroTier LAN standard
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*
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* @return Ethernet MAC derived from address
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*/
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inline MAC toMAC() const
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throw()
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{
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MAC m;
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m.data[0] = ZT_MAC_FIRST_OCTET;
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for(int i=1;i<6;++i)
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m.data[i] = _a.o[i - 1];
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return m;
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}
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/**
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* @return Hexadecimal string
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*/
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inline std::string toString() const
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{
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return Utils::hex(_a.o,ZT_ADDRESS_LENGTH);
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};
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/**
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* Set address to zero
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*/
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inline void zero() throw() { _a.v = 0; }
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/**
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* @return True if this address is not zero
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*/
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inline operator bool() const throw() { return (_a.v); }
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/**
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* @return Sum of all bytes in address
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*/
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inline unsigned int sum() const
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throw()
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{
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unsigned int s = 0;
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for(unsigned int i=0;i<ZT_ADDRESS_LENGTH;++i)
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s += _a.o[i];
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return s;
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}
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/**
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* Check if this address is reserved
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*
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* The all-zero null address and any address beginning with 0xff are
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* reserved. (0xff is reserved for future use to designate possibly
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* longer addresses, addresses based on IPv6 innards, etc.)
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*
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* @return True if address is reserved and may not be used
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*/
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inline bool isReserved() const
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throw()
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{
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return ((!_a.v)||(_a.o[0] == ZT_ADDRESS_RESERVED_PREFIX));
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}
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inline unsigned char *data() throw() { return _a.o; }
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inline const unsigned char *data() const throw() { return _a.o; }
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inline unsigned int size() const throw() { return ZT_ADDRESS_LENGTH; }
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inline unsigned char &operator[](unsigned int i) throw() { return _a.o[i]; }
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inline unsigned char operator[](unsigned int i) const throw() { return _a.o[i]; }
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inline bool operator==(const Address &a) const throw() { return (_a.v == a._a.v); }
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inline bool operator!=(const Address &a) const throw() { return (_a.v != a._a.v); }
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inline bool operator<(const Address &a) const throw() { return (_a.v < a._a.v); }
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inline bool operator>(const Address &a) const throw() { return (_a.v > a._a.v); }
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inline bool operator<=(const Address &a) const throw() { return (_a.v <= a._a.v); }
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inline bool operator>=(const Address &a) const throw() { return (_a.v >= a._a.v); }
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};
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} // namespace ZeroTier
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#endif
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