mirror of
https://github.com/NAStools/zerotierone.git
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144 lines
4.0 KiB
C++
144 lines
4.0 KiB
C++
/*
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* ZeroTier One - Network Virtualization Everywhere
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* Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef ZT_CLUSTERGEOIPSERVICE_HPP
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#define ZT_CLUSTERGEOIPSERVICE_HPP
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#ifdef ZT_ENABLE_CLUSTER
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <vector>
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#include <string>
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#include <algorithm>
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#include "../node/Constants.hpp"
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#include "../node/Mutex.hpp"
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#include "../node/NonCopyable.hpp"
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#include "../node/InetAddress.hpp"
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namespace ZeroTier {
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/**
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* Loads a GeoIP CSV into memory for fast lookup, reloading as needed
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*
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* This was designed around the CSV from https://db-ip.com but can be used
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* with any similar GeoIP CSV database that is presented in the form of an
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* IP range and lat/long coordinates.
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*
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* It loads the whole database into memory, which can be kind of large. If
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* the CSV file changes, the changes are loaded automatically.
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*/
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class ClusterGeoIpService : NonCopyable
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{
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public:
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ClusterGeoIpService();
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~ClusterGeoIpService();
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/**
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* Load or reload CSV file
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*
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* CSV column indexes start at zero. CSVs can be quoted with single or
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* double quotes. Whitespace before or after commas is ignored. Backslash
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* may be used for escaping whitespace as well.
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*
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* @param pathToCsv Path to (uncompressed) CSV file
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* @param ipStartColumn Column with IP range start
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* @param ipEndColumn Column with IP range end (inclusive)
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* @param latitudeColumn Column with latitude
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* @param longitudeColumn Column with longitude
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* @return Number of valid records loaded or -1 on error (invalid file, not found, etc.)
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*/
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inline long load(const char *pathToCsv,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn)
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{
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Mutex::Lock _l(_lock);
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return _load(pathToCsv,ipStartColumn,ipEndColumn,latitudeColumn,longitudeColumn);
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}
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/**
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* Attempt to locate an IP
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*
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* This returns true if x, y, and z are set. If the return value is false
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* the values of x, y, and z are undefined.
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*
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* @param ip IPv4 or IPv6 address
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* @param x Reference to variable to receive X
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* @param y Reference to variable to receive Y
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* @param z Reference to variable to receive Z
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* @return True if coordinates were set
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*/
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bool locate(const InetAddress &ip,int &x,int &y,int &z);
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/**
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* @return True if IP database/service is available for queries (otherwise locate() will always be false)
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*/
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inline bool available() const
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{
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Mutex::Lock _l(_lock);
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return ((_v4db.size() + _v6db.size()) > 0);
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}
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private:
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struct _V4E
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{
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uint32_t start;
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uint32_t end;
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float lat,lon;
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int16_t x,y,z;
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inline bool operator<(const _V4E &e) const { return (start < e.start); }
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};
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struct _V6E
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{
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uint8_t start[16];
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uint8_t end[16];
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float lat,lon;
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int16_t x,y,z;
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inline bool operator<(const _V6E &e) const { return (memcmp(start,e.start,16) < 0); }
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};
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static void _parseLine(const char *line,std::vector<_V4E> &v4db,std::vector<_V6E> &v6db,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn);
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long _load(const char *pathToCsv,int ipStartColumn,int ipEndColumn,int latitudeColumn,int longitudeColumn);
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std::string _pathToCsv;
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int _ipStartColumn;
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int _ipEndColumn;
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int _latitudeColumn;
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int _longitudeColumn;
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uint64_t _lastFileCheckTime;
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uint64_t _csvModificationTime;
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int64_t _csvFileSize;
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std::vector<_V4E> _v4db;
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std::vector<_V6E> _v6db;
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Mutex _lock;
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};
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} // namespace ZeroTier
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#endif // ZT_ENABLE_CLUSTER
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#endif
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