Run geoip cluster service sub-process.

service/ClusterGeoIpService.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_CLUSTERGEOIPSERVICE_HPP
+#define ZT_CLUSTERGEOIPSERVICE_HPP
+
+#ifdef ZT_ENABLE_CLUSTER
+
+#include <vector>
+#include <map>
+#include <string>
+
+#include "../node/Constants.hpp"
+#include "../node/InetAddress.hpp"
+#include "../node/Mutex.hpp"
+#include "../osdep/Thread.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Runs the Cluster GeoIP service in the background and resolves geoIP queries
+ */
+class ClusterGeoIpService
+{
+public:
+	/**
+	 * @param pathToExe Path to cluster geo-resolution service executable
+	 */
+	ClusterGeoIpService(const char *pathToExe);
+
+	~ClusterGeoIpService();
+
+	/**
+	 * Attempt to locate an IP
+	 *
+	 * This returns true if x, y, and z are set. Otherwise it returns false
+	 * and a geo-locate job is ordered in the background. This usually takes
+	 * 500-1500ms to complete, after which time results will be available.
+	 * If false is returned the supplied coordinate variables are unchanged.
+	 *
+	 * @param ip IPv4 or IPv6 address
+	 * @param x Reference to variable to receive X
+	 * @param y Reference to variable to receive Y
+	 * @param z Reference to variable to receive Z
+	 * @return True if coordinates were set
+	 */
+	bool locate(const InetAddress &ip,int &x,int &y,int &z);
+
+	void threadMain()
+		throw();
+
+private:
+	const std::string _pathToExe;
+	int _sOutputFd;
+	int _sInputFd;
+	volatile long _sPid;
+	volatile bool _run;
+	Thread _thread;
+	Mutex _sOutputLock;
+
+	struct _CE { uint64_t ts; int x,y,z; };
+	std::map< InetAddress,_CE > _cache;
+	Mutex _cache_m;
+};
+
+} // namespace ZeroTier
+
+#endif // ZT_ENABLE_CLUSTER
+
+#endif