forked from I2P_Developers/i2p.i2p
421 lines
15 KiB
Java
421 lines
15 KiB
Java
package net.i2p.router.transport;
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/*
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* free (adj.): unencumbered; not under the control of others
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* Use at your own risk.
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*/
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.File;
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import java.io.FileInputStream;
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import java.net.InetAddress;
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import java.io.InputStreamReader;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import java.util.Locale;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.atomic.AtomicBoolean;
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import net.i2p.data.Hash;
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import net.i2p.router.Router;
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import net.i2p.router.RouterContext;
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import net.i2p.util.Addresses;
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import net.i2p.util.ConcurrentHashSet;
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import net.i2p.util.Log;
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/**
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* Manage geoip lookup in a file with the Tor geoip format.
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*
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* The lookup is expensive, so a lookup is queued with add().
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* The actual lookup of multiple IPs is fired with lookup().
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* To get a country for an IP, use get() which returns a lower-case,
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* generally two-letter country code or null.
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*
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* Everything here uses longs, since Java is signed-only, the file is
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* sorted by unsigned, and we don't store the table in memory
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* (unlike in Blocklist.java, where it's in-memory so we want to be
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* space-efficient)
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*
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* @author zzz
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*/
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class GeoIP {
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private final Log _log;
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// change to test with main()
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//private final I2PAppContext _context;
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private final RouterContext _context;
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private final Map<String, String> _codeToName;
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/** code to itself to prevent String proliferation */
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private final Map<String, String> _codeCache;
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// In the following structures, an IPv4 IP is stored as a non-negative long, 0 to 2**32 - 1,
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// and the first 8 bytes of an IPv6 IP are stored as a signed long.
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private final Map<Long, String> _IPToCountry;
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private final Set<Long> _pendingSearch;
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private final Set<Long> _pendingIPv6Search;
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private final Set<Long> _notFound;
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private final AtomicBoolean _lock;
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private int _lookupRunCount;
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//public GeoIP(I2PAppContext context) {
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public GeoIP(RouterContext context) {
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_context = context;
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_log = context.logManager().getLog(GeoIP.class);
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_codeToName = new ConcurrentHashMap(512);
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_codeCache = new ConcurrentHashMap(512);
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_IPToCountry = new ConcurrentHashMap();
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_pendingSearch = new ConcurrentHashSet();
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_pendingIPv6Search = new ConcurrentHashSet();
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_notFound = new ConcurrentHashSet();
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_lock = new AtomicBoolean();
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readCountryFile();
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}
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static final String PROP_GEOIP_ENABLED = "routerconsole.geoip.enable";
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static final String GEOIP_DIR_DEFAULT = "geoip";
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static final String GEOIP_FILE_DEFAULT = "geoip.txt";
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static final String COUNTRY_FILE_DEFAULT = "countries.txt";
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public static final String PROP_IP_COUNTRY = "i2np.lastCountry";
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/**
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* @since 0.9.3
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*/
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public void shutdown() {
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_codeToName.clear();
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_codeCache.clear();
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_IPToCountry.clear();
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_pendingSearch.clear();
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_pendingIPv6Search.clear();
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_notFound.clear();
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}
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/**
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* Fire off a thread to lookup all pending IPs.
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* There is no indication of completion.
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* Results will be added to the table and available via get() after completion.
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*/
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/******
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public void lookup() {
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if (! _context.getBooleanPropertyDefaultTrue(PROP_GEOIP_ENABLED)) {
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_pendingSearch.clear();
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return;
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}
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Thread t = new Thread(new LookupJob());
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t.start();
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}
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******/
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/**
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* Blocking lookup of all pending IPs.
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* Results will be added to the table and available via get() after completion.
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*/
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public void blockingLookup() {
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if (! _context.getBooleanPropertyDefaultTrue(PROP_GEOIP_ENABLED)) {
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_pendingSearch.clear();
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_pendingIPv6Search.clear();
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return;
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}
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int pri = Thread.currentThread().getPriority();
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if (pri > Thread.MIN_PRIORITY)
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Thread.currentThread().setPriority(pri - 1);
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try {
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LookupJob j = new LookupJob();
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j.run();
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updateOurCountry();
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} finally {
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if (pri > Thread.MIN_PRIORITY)
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Thread.currentThread().setPriority(pri);
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}
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}
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private class LookupJob implements Runnable {
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private static final int CLEAR = 8;
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public void run() {
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if (_lock.getAndSet(true))
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return;
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try {
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// clear the negative cache every few runs, to prevent it from getting too big
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if (((++_lookupRunCount) % CLEAR) == 0)
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_notFound.clear();
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// IPv4
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Long[] search = _pendingSearch.toArray(new Long[_pendingSearch.size()]);
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_pendingSearch.clear();
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if (search.length > 0) {
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String[] countries = readGeoIPFile(search);
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for (int i = 0; i < countries.length; i++) {
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if (countries[i] != null)
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_IPToCountry.put(search[i], countries[i]);
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else
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_notFound.add(search[i]);
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}
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}
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// IPv6
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search = _pendingSearch.toArray(new Long[_pendingIPv6Search.size()]);
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_pendingIPv6Search.clear();
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if (search.length > 0) {
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String[] countries = GeoIPv6.readGeoIPFile(_context, search, _codeCache);
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for (int i = 0; i < countries.length; i++) {
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if (countries[i] != null)
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_IPToCountry.put(search[i], countries[i]);
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else
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_notFound.add(search[i]);
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}
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}
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} finally {
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_lock.set(false);
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}
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}
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}
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/**
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* Read in and parse the country file.
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* The file need not be sorted.
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*
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* Acceptable formats:
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* #comment (# must be in column 1)
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* code,full name
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*
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* Example:
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* US,UNITED STATES
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*
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* To create:
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* wget http://ip-to-country.webhosting.info/downloads/ip-to-country.csv.zip
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* unzip ip-to-country.csv.zip
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* cut -d, -f3,5 < ip-to-country.csv|sed 's/"//g' | sort | uniq > countries.txt
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*
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*/
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private void readCountryFile() {
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File geoFile = new File(_context.getBaseDir(), GEOIP_DIR_DEFAULT);
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geoFile = new File(geoFile, COUNTRY_FILE_DEFAULT);
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if (!geoFile.exists()) {
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if (_log.shouldLog(Log.WARN))
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_log.warn("Country file not found: " + geoFile.getAbsolutePath());
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return;
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}
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FileInputStream in = null;
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try {
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in = new FileInputStream(geoFile);
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BufferedReader br = new BufferedReader(new InputStreamReader(in, "UTF-8"));
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String line = null;
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while ( (line = br.readLine()) != null) {
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try {
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if (line.charAt(0) == '#') {
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continue;
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}
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String[] s = line.split(",");
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String lc = s[0].toLowerCase(Locale.US);
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_codeToName.put(lc, s[1]);
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_codeCache.put(lc, lc);
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} catch (IndexOutOfBoundsException ioobe) {
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}
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}
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} catch (IOException ioe) {
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if (_log.shouldLog(Log.ERROR))
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_log.error("Error reading the Country File", ioe);
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} finally {
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if (in != null) try { in.close(); } catch (IOException ioe) {}
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}
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}
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/**
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* Read in and parse the geoip file.
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* The geoip file must be sorted, and may not contain overlapping entries.
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*
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* Acceptable formats (IPV4 only):
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* #comment (# must be in column 1)
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* integer IP,integer IP, country code
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*
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* Example:
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* 121195296,121195327,IT
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*
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* This is identical to the Tor geoip file, which can be found in
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* src/config/geoip in their distribution, or /usr/local/lib/share/tor/geoip
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* in their installation.
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* Thanks to Tor for finding a source for the data, and the format script.
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*
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* To create:
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* wget http://ip-to-country.webhosting.info/downloads/ip-to-country.csv.zip
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* unzip ip-to-country.csv.zip
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* cut -d, -f0-3 < ip-to-country.csv|sed 's/"//g' > geoip.txt
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*
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* @param search a sorted array of IPs to search
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* @return an array of country codes, same order as the search param,
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* or a zero-length array on failure
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*
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*/
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private String[] readGeoIPFile(Long[] search) {
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File geoFile = new File(_context.getBaseDir(), GEOIP_DIR_DEFAULT);
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geoFile = new File(geoFile, GEOIP_FILE_DEFAULT);
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if (!geoFile.exists()) {
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if (_log.shouldLog(Log.WARN))
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_log.warn("GeoIP file not found: " + geoFile.getAbsolutePath());
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return new String[0];
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}
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String[] rv = new String[search.length];
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int idx = 0;
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long start = _context.clock().now();
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FileInputStream in = null;
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try {
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in = new FileInputStream(geoFile);
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String buf = null;
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BufferedReader br = new BufferedReader(new InputStreamReader(in, "ISO-8859-1"));
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while ((buf = br.readLine()) != null && idx < search.length) {
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try {
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if (buf.charAt(0) == '#') {
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continue;
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}
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String[] s = buf.split(",");
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long ip1 = Long.parseLong(s[0]);
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long ip2 = Long.parseLong(s[1]);
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while (idx < search.length && search[idx].longValue() < ip1) {
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idx++;
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}
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while (idx < search.length && search[idx].longValue() >= ip1 && search[idx].longValue() <= ip2) {
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String lc = s[2].toLowerCase(Locale.US);
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// replace the new string with the identical one from the cache
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String cached = _codeCache.get(lc);
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if (cached == null)
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cached = lc;
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rv[idx++] = cached;
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}
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} catch (IndexOutOfBoundsException ioobe) {
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} catch (NumberFormatException nfe) {
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}
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}
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} catch (IOException ioe) {
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if (_log.shouldLog(Log.ERROR))
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_log.error("Error reading the geoFile", ioe);
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} finally {
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if (in != null) try { in.close(); } catch (IOException ioe) {}
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}
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if (_log.shouldLog(Log.INFO)) {
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_log.info("GeoIP processing finished, time: " + (_context.clock().now() - start));
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}
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return rv;
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}
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/**
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* Put our country code in the config, where others (such as Timestamper) can get it,
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* and it will be there next time at startup.
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*/
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private void updateOurCountry() {
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/**** comment out to test with main() */
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String oldCountry = _context.router().getConfigSetting(PROP_IP_COUNTRY);
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Hash ourHash = _context.routerHash();
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// we should always have a RouterInfo by now, but we had one report of an NPE here
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if (ourHash == null)
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return;
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String country = _context.commSystem().getCountry(ourHash);
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if (country != null && !country.equals(oldCountry)) {
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_context.router().saveConfig(PROP_IP_COUNTRY, country);
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if (_context.commSystem().isInBadCountry() && _context.getProperty(Router.PROP_HIDDEN_HIDDEN) == null) {
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String name = fullName(country);
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if (name == null)
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name = country;
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_log.logAlways(Log.WARN, "Setting hidden mode to protect you in " + name +
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", you may override on the network configuration page");
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_context.router().rebuildRouterInfo();
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}
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}
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/****/
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}
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/**
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* Add to the list needing lookup
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* @param ip IPv4 or IPv6
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*/
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public void add(String ip) {
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byte[] pib = Addresses.getIP(ip);
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if (pib == null) return;
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add(pib);
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}
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/**
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* Add to the list needing lookup
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* @param ip IPv4 or IPv6
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*/
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public void add(byte ip[]) {
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add(toLong(ip));
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}
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/** see above for ip-to-long mapping */
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private void add(long ip) {
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Long li = Long.valueOf(ip);
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if (!(_IPToCountry.containsKey(li) || _notFound.contains(li))) {
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if (ip >= 0 && ip < (1L << 32))
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_pendingSearch.add(li);
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else
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_pendingIPv6Search.add(li);
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}
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}
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/**
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* Get the country for an IP from the cache.
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* @param ip IPv4 or IPv6
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* @return lower-case code, generally two letters, or null.
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*/
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public String get(String ip) {
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byte[] pib = Addresses.getIP(ip);
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if (pib == null) return null;
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return get(pib);
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}
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/**
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* Get the country for an IP from the cache.
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* @param ip IPv4 or IPv6
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* @return lower-case code, generally two letters, or null.
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*/
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public String get(byte ip[]) {
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return get(toLong(ip));
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}
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/** see above for ip-to-long mapping */
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private String get(long ip) {
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return _IPToCountry.get(Long.valueOf(ip));
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}
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/** see above for ip-to-long mapping */
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private static long toLong(byte ip[]) {
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int rv = 0;
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if (ip.length == 16) {
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for (int i = 0; i < 8; i++)
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rv |= (ip[i] & 0xffL) << ((7-i)*8);
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return rv;
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} else {
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for (int i = 0; i < 4; i++)
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rv |= (ip[i] & 0xff) << ((3-i)*8);
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return rv & 0xffffffffl;
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}
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}
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/**
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* Get the country for a country code
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* @param code two-letter lower case code
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* @return untranslated name or null
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*/
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public String fullName(String code) {
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return _codeToName.get(code);
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}
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/*** doesn't work since switched to RouterContext above
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public static void main(String args[]) {
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GeoIP g = new GeoIP(new I2PAppContext());
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String tests[] = {"0.0.0.0", "0.0.0.1", "0.0.0.2", "0.0.0.255", "1.0.0.0",
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"94.3.3.3", "77.1.2.3", "127.0.0.0", "127.127.127.127", "128.0.0.0",
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"89.8.9.3", "72.5.6.8", "217.4.9.7", "175.107.027.107", "135.6.5.2",
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"129.1.2.3", "255.255.255.254", "255.255.255.255"};
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for (int i = 0; i < tests.length; i++)
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g.add(tests[i]);
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long start = System.currentTimeMillis();
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g.blockingLookup();
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System.out.println("Lookup took " + (System.currentTimeMillis() - start));
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for (int i = 0; i < tests.length; i++)
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System.out.println(tests[i] + " : " + g.get(tests[i]));
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}
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***/
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}
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