forked from I2P_Developers/i2p.i2p
drop ExecNamingService, moving to i2p.scripts
This commit is contained in:
@@ -1,129 +0,0 @@
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/*
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* By zzz 2008, released into the public domain
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* with no warranty of any kind, either expressed or implied.
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*/
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package net.i2p.client.naming;
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import java.io.InputStream;
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import java.util.Locale;
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import java.util.Properties;
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import net.i2p.I2PAppContext;
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import net.i2p.data.Destination;
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/**
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* An interface to an external naming service program, with in-memory caching.
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* This can be used as a simple and flexible way to experiment with
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* alternative naming systems.
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*
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* The external command takes a hostname argument and must return (only) the
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* 516-byte Base64 destination, or hostname=dest, on stdout.
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* A trailing \n or \r\n is acceptable.
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* The command must exit 0 on success. Nonzero on failure is optional.
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*
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* The external command can do local and/or remote (via i2p or not) lookups.
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* No timeouts are implemented here - the author of the external program
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* must ensure that the program returns in a reasonable amount of time -
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* (15 sec max suggested)
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*
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* Can be used from MetaNamingService, (e.g. after HostsTxtNamingService),
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* or as the sole naming service.
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* Supports caching, b32, and b64.
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*
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* Sample chained config to put in configadvanced.jsp (restart required):
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*
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* i2p.naming.impl=net.i2p.client.naming.MetaNamingService
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* i2p.nameservicelist=net.i2p.client.naming.HostsTxtNamingService,net.i2p.client.naming.ExecNamingService
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* i2p.naming.exec.command=/usr/local/bin/i2presolve
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*
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* Sample unchained config to put in configadvanced.jsp (restart required):
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*
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* i2p.naming.impl=net.i2p.client.naming.ExecNamingService
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* i2p.naming.exec.command=/usr/local/bin/i2presolve
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*
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*/
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public class ExecNamingService extends DummyNamingService {
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private final static String PROP_EXEC_CMD = "i2p.naming.exec.command";
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private final static String DEFAULT_EXEC_CMD = "/usr/local/bin/i2presolve";
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private final static String PROP_SHELL_CMD = "i2p.naming.exec.shell";
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private final static String DEFAULT_SHELL_CMD = "/bin/bash";
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/**
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* The naming service should only be constructed and accessed through the
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* application context. This constructor should only be used by the
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* appropriate application context itself.
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*
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*/
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public ExecNamingService(I2PAppContext context) {
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super(context);
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// disable for now
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throw new UnsupportedOperationException();
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}
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@Override
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public Destination lookup(String hostname, Properties lookupOptions, Properties storedOptions) {
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Destination d = super.lookup(hostname, null, null);
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if (d != null)
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return d;
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// Base32 failed?
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if (hostname.length() == BASE32_HASH_LENGTH + 8 && hostname.toLowerCase(Locale.US).endsWith(".b32.i2p"))
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return null;
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hostname = hostname.toLowerCase(Locale.US);
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// lookup
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String key = fetchAddr(hostname);
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if (key != null) {
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_log.error("Success: " + hostname);
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d = lookupBase64(key);
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putCache(hostname, d);
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return d;
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}
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return null;
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}
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// FIXME allow larger Dests for non-null Certs
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private static final int MAX_RESPONSE = DEST_SIZE + 68 + 10; // allow for hostname= and some trailing stuff
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private String fetchAddr(String hostname) {
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String[] commandArr = new String[3];
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commandArr[0] = _context.getProperty(PROP_SHELL_CMD, DEFAULT_SHELL_CMD);
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commandArr[1] = "-c";
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String command = _context.getProperty(PROP_EXEC_CMD, DEFAULT_EXEC_CMD) + " " + hostname;
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commandArr[2] = command;
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try {
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Process get = Runtime.getRuntime().exec(commandArr);
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get.waitFor();
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int exitValue = get.exitValue();
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if (exitValue != 0) {
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_log.error("Exit " + exitValue + " from " + commandArr[0] + " " + commandArr[1] + " \"" + command + "\"");
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return null;
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}
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InputStream is = get.getInputStream();
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byte[] input = new byte[MAX_RESPONSE];
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int count = is.read(input);
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is.close();
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if (count < DEST_SIZE) {
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_log.error("Short response: " + command);
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return null;
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}
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String key = new String(input);
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if (key.startsWith(hostname + "=")) // strip hostname=
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key = key.substring(hostname.length() + 1);
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key = key.substring(0, DEST_SIZE); // catch IndexOutOfBounds exception below
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if (!key.endsWith("AA")) {
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_log.error("Invalid key: " + command);
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return null;
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}
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if (key.replaceAll("[a-zA-Z0-9~-]", "").length() != 0) {
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_log.error("Invalid chars: " + command);
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return null;
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}
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return key;
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} catch (Throwable t) {
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_log.error("Error fetching the addr", t);
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}
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return null;
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}
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}
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