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attic/ClusterGeoIpService.hpp

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+/*
+ * ZeroTier One - Network Virtualization Everywhere
+ * Copyright (C) 2011-2017  ZeroTier, Inc.  https://www.zerotier.com/
+ *
+ * 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/>.
+ *
+ * --
+ *
+ * You can be released from the requirements of the license by purchasing
+ * a commercial license. Buying such a license is mandatory as soon as you
+ * develop commercial closed-source software that incorporates or links
+ * directly against ZeroTier software without disclosing the source code
+ * of your own application.
+ */
+
+#ifndef ZT_CLUSTERGEOIPSERVICE_HPP
+#define ZT_CLUSTERGEOIPSERVICE_HPP
+
+#ifdef ZT_ENABLE_CLUSTER
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <vector>
+#include <string>
+#include <algorithm>
+
+#include "../node/Constants.hpp"
+#include "../node/Mutex.hpp"
+#include "../node/NonCopyable.hpp"
+#include "../node/InetAddress.hpp"
+
+namespace ZeroTier {
+
+/**
+ * Loads a GeoIP CSV into memory for fast lookup, reloading as needed
+ *
+ * This was designed around the CSV from https://db-ip.com but can be used
+ * with any similar GeoIP CSV database that is presented in the form of an
+ * IP range and lat/long coordinates.
+ *
+ * It loads the whole database into memory, which can be kind of large. If
+ * the CSV file changes, the changes are loaded automatically.
+ */
+class ClusterGeoIpService : NonCopyable
+{
+public:
+	ClusterGeoIpService();
+	~ClusterGeoIpService();
+
+	/**
+	 * Load or reload CSV file
+	 *
+	 * CSV column indexes start at zero. CSVs can be quoted with single or
+	 * double quotes. Whitespace before or after commas is ignored. Backslash
+	 * may be used for escaping whitespace as well.
+	 *
+	 * @param pathToCsv Path to (uncompressed) CSV file
+	 * @param ipStartColumn Column with IP range start
+	 * @param ipEndColumn Column with IP range end (inclusive)
+	 * @param latitudeColumn Column with latitude
+	 * @param longitudeColumn Column with longitude
+	 * @return Number of valid records loaded or -1 on error (invalid file, not found, etc.)
+	 */
+	inline long load(const char *pathToCsv,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn)
+	{
+		Mutex::Lock _l(_lock);
+		return _load(pathToCsv,ipStartColumn,ipEndColumn,latitudeColumn,longitudeColumn);
+	}
+
+	/**
+	 * Attempt to locate an IP
+	 *
+	 * This returns true if x, y, and z are set. If the return value is false
+	 * the values of x, y, and z are undefined.
+	 *
+	 * @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);
+
+	/**
+	 * @return True if IP database/service is available for queries (otherwise locate() will always be false)
+	 */
+	inline bool available() const
+	{
+		Mutex::Lock _l(_lock);
+		return ((_v4db.size() + _v6db.size()) > 0);
+	}
+
+private:
+	struct _V4E
+	{
+		uint32_t start;
+		uint32_t end;
+		float lat,lon;
+		int16_t x,y,z;
+
+		inline bool operator<(const _V4E &e) const { return (start < e.start); }
+	};
+
+	struct _V6E
+	{
+		uint8_t start[16];
+		uint8_t end[16];
+		float lat,lon;
+		int16_t x,y,z;
+
+		inline bool operator<(const _V6E &e) const { return (memcmp(start,e.start,16) < 0); }
+	};
+
+	static void _parseLine(const char *line,std::vector<_V4E> &v4db,std::vector<_V6E> &v6db,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn);
+	long _load(const char *pathToCsv,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn);
+
+	std::string _pathToCsv;
+	int _ipStartColumn;
+	int _ipEndColumn;
+	int _latitudeColumn;
+	int _longitudeColumn;
+
+	uint64_t _lastFileCheckTime;
+	uint64_t _csvModificationTime;
+	int64_t _csvFileSize;
+
+	std::vector<_V4E> _v4db;
+	std::vector<_V6E> _v6db;
+
+	Mutex _lock;
+};
+
+} // namespace ZeroTier
+
+#endif // ZT_ENABLE_CLUSTER
+
+#endif