New git repository for release - version 0.2.0 tagged

node/Address.hpp

@@ -0,0 +1,176 @@
+/*
+ * 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
+