Reworking of paths in Peer work-in-progress, and TCP connect support in SocketManager. Also add FD_SETSIZE checking for the default select implementation of sockets.

1 files changed, 125 insertions, 0 deletions

diff --git a/node/Path.hpp b/node/Path.hpp
new file mode 100644
index 00000000..2dd3b560
--- /dev/null
+++ b/node/Path.hpp
@@ -0,0 +1,125 @@
+/*
+ * 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_PATH_HPP
+#define ZT_PATH_HPP
+
+#include <stdint.h>
+
+#include "Constants.hpp"
+#include "InetAddress.hpp"
+#include "Utils.hpp"
+
+#include <string>
+
+namespace ZeroTier {
+
+/**
+ * WAN address and protocol for reaching a peer
+ */
+class Path
+{
+public:
+	Path() :
+		_lastSent(0),
+		_lastReceived(0),
+		_lastFirewallOpener(0),
+		_lastPing(0),
+		_addr(),
+		_tcp(false),
+		_fixed(false) {}
+
+	Path(const InetAddress &addr,bool tcp,bool fixed) :
+		_lastSent(0),
+		_lastReceived(0),
+		_lastFirewallOpener(0),
+		_lastPing(0),
+		_addr(addr),
+		_tcp(tcp),
+		_fixed(fixed) {}
+
+	inline const InetAddress &address() const throw() { return _addr; }
+	inline bool tcp() const throw() { return _tcp; }
+	inline uint64_t lastSent() const throw() { return _lastSent; }
+	inline uint64_t lastReceived() const throw() { return _lastReceived; }
+	inline uint64_t lastFirewallOpener() const throw() { return _lastFirewallOpener; }
+	inline uint64_t lastPing() const throw() { return _lastPing; }
+	inline bool fixed() const throw() { return _fixed; }
+
+	inline void sent(uint64_t t) throw() { _lastSent = t; }
+	inline void received(uint64_t t) throw() { _lastReceived = t; }
+	inline void firewallOpenerSent(uint64_t t) throw() { _lastFirewallOpener = t; }
+	inline void pinged(uint64_t t) throw() { _lastPing = t; }
+
+	inline bool active(uint64_t now) const
+		throw()
+	{
+		return ((_addr)&&((_fixed)||((now - _lastReceived) < ZT_PEER_PATH_ACTIVITY_TIMEOUT)));
+	}
+
+	/**
+	 * @return Human-readable address and other information about this path, some computed as of current time
+	 */
+	inline std::string toString() const
+	{
+		uint64_t now = Utils::now();
+		char lsago[32],lrago[32],lfoago[32],lpago[32];
+		Utils::snprintf(lsago,sizeof(lsago),"%lld",(long long)((_lastSent != 0) ? (now - _lastSent) : -1));
+		Utils::snprintf(lrago,sizeof(lrago),"%lld",(long long)((_lastReceived != 0) ? (now - _lastReceived) : -1));
+		Utils::snprintf(lfoago,sizeof(lfoago),"%lld",(long long)((_lastFirewallOpener != 0) ? (now - _lastFirewallOpener) : -1));
+		Utils::snprintf(lpago,sizeof(lfoago),"%lld",(long long)((_lastPing != 0) ? (now - _lastPing) : -1));
+		return (std::string(_tcp ? "tcp:" : "udp:") + _addr.toString() + "[" + lsago + "," lrago + "," + lpago + "," + lfoago + "," + (active(now) ? "active" : "inactive") + "," + (_fixed ? "fixed" : "learned") + "]");
+	}
+
+	inline operator==(const Path &p) const throw() { return ((_addr == p._addr)&&(_tcp == p._tcp)); }
+	inline operator!=(const Path &p) const throw() { return ((_addr != p._addr)||(_tcp != p._tcp)); }
+	inline operator<(const Path &p) const
+		throw()
+	{
+		if (_addr == p._addr) {
+			if (!_tcp) // UDP < TCP
+				return p._tcp;
+			return false;
+		} else return (_addr < p._addr);
+	}
+	inline bool operator>(const Path &p) const throw() { return (p < *this); }
+	inline bool operator<=(const Path &p) const throw() { return !(p < *this); }
+	inline bool operator>=(const Path &p) const throw() { return !(*this < p); }
+
+private:
+	volatile uint64_t _lastSent;
+	volatile uint64_t _lastReceived;
+	volatile uint64_t _lastFirewallOpener;
+	volatile uint64_t _lastPing;
+	InetAddress _addr;
+	bool _tcp;
+	bool _fixed;
+};
+
+} // namespace ZeroTier
+
+#endif