For curiosity add Salsa20/8 to benchmarks.

node/RemotePath.hpp

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+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2015  ZeroTier, Inc.
+ *
+ * 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_PATH_HPP
+#define ZT_PATH_HPP
+
+#include <stdint.h>
+#include <string.h>
+
+#include <stdexcept>
+#include <string>
+#include <algorithm>
+
+#include "Constants.hpp"
+#include "Node.hpp"
+#include "InetAddress.hpp"
+#include "Utils.hpp"
+#include "AntiRecursion.hpp"
+#include "RuntimeEnvironment.hpp"
+
+namespace ZeroTier {
+
+/**
+ * WAN address and protocol for reaching a peer
+ *
+ * This structure is volatile and memcpy-able, and depends on
+ * InetAddress being similarly safe.
+ */
+class Path
+{
+public:
+	Path() :
+		_addr(),
+		_lastSend(0),
+		_lastReceived(0),
+		_fixed(false) {}
+
+	Path(const Path &p) throw() { memcpy(this,&p,sizeof(Path)); }
+
+	Path(const InetAddress &addr,bool fixed) :
+		_addr(addr),
+		_lastSend(0),
+		_lastReceived(0),
+		_fixed(fixed) {}
+
+	inline void init(const InetAddress &addr,bool fixed)
+	{
+		_addr = addr;
+		_lastSend = 0;
+		_lastReceived = 0;
+		_fixed = fixed;
+	}
+
+	inline Path &operator=(const Path &p)
+	{
+		if (this != &p)
+			memcpy(this,&p,sizeof(Path));
+		return *this;
+	}
+
+	inline const InetAddress &address() const throw() { return _addr; }
+
+	inline uint64_t lastSend() const throw() { return _lastSend; }
+	inline uint64_t lastReceived() const throw() { return _lastReceived; }
+
+	/**
+	 * Called when a packet is sent to this path
+	 *
+	 * This is called automatically by Path::send().
+	 *
+	 * @param t Time of send
+	 */
+	inline void sent(uint64_t t)
+		throw()
+	{
+		_lastSend = t;
+	}
+
+	/**
+	 * Called when a packet is received from this path
+	 *
+	 * @param t Time of receive
+	 */
+	inline void received(uint64_t t)
+		throw()
+	{
+		_lastReceived = t;
+	}
+
+	/**
+	 * @return Is this a fixed path?
+	 */
+	inline bool fixed() const throw() { return _fixed; }
+
+	/**
+	 * @param f New value of fixed path flag
+	 */
+	inline void setFixed(bool f) throw() { _fixed = f; }
+
+	/**
+	 * @param now Current time
+	 * @return True if this path is fixed or has received data in last ACTIVITY_TIMEOUT ms
+	 */
+	inline bool active(uint64_t now) const
+		throw()
+	{
+		return ( (_fixed) || ((now - _lastReceived) < ZT_PEER_ACTIVITY_TIMEOUT) );
+	}
+
+	/**
+	 * Send a packet via this path
+	 *
+	 * @param RR Runtime environment
+	 * @param data Packet data
+	 * @param len Packet length
+	 * @param now Current time
+	 * @return True if transport reported success
+	 */
+	inline bool send(const RuntimeEnvironment *RR,const void *data,unsigned int len,uint64_t now)
+	{
+		if (RR->node->putPacket(_addr,data,len)) {
+			sent(now);
+			RR->antiRec->logOutgoingZT(data,len);
+			return true;
+		}
+		return false;
+	}
+
+	/**
+	 * @param now Current time
+	 * @return Human-readable address and other information about this path
+	 */
+	inline std::string toString(uint64_t now) const
+	{
+		char tmp[1024];
+		Utils::snprintf(tmp,sizeof(tmp),"%s(%s)",
+			_addr.toString().c_str(),
+			((_fixed) ? "fixed" : (active(now) ? "active" : "inactive"))
+		);
+		return std::string(tmp);
+	}
+
+	inline operator bool() const throw() { return (_addr); }
+
+	inline bool operator==(const Path &p) const throw() { return (_addr == p._addr); }
+	inline bool operator!=(const Path &p) const throw() { return (_addr != p._addr); }
+	inline bool operator<(const Path &p) const throw() { return (_addr < p._addr); }
+	inline bool operator>(const Path &p) const throw() { return (_addr > p._addr); }
+	inline bool operator<=(const Path &p) const throw() { return (_addr <= p._addr); }
+	inline bool operator>=(const Path &p) const throw() { return (_addr >= p._addr); }
+
+private:
+	InetAddress _addr;
+	uint64_t _lastSend;
+	uint64_t _lastReceived;
+	bool _fixed;
+};
+
+} // namespace ZeroTier
+
+#endif