113 lines
3.7 KiB
Java
113 lines
3.7 KiB
Java
/*
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Copyright Paul James Mutton, 2001-2007, http://www.jibble.org/
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This file is part of PircBot.
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This software is dual-licensed, allowing you to choose between the GNU
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General Public License (GPL) and the www.jibble.org Commercial License.
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Since the GPL may be too restrictive for use in a proprietary application,
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a commercial license is also provided. Full license information can be
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found at http://www.jibble.org/licenses/
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*/
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package org.jibble.pircbot;
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import java.net.*;
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import java.io.*;
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/**
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* A simple IdentServer (also know as "The Identification Protocol").
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* An ident server provides a means to determine the identity of a
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* user of a particular TCP connection.
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* <p>
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* Most IRC servers attempt to contact the ident server on connecting
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* hosts in order to determine the user's identity. A few IRC servers
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* will not allow you to connect unless this information is provided.
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* <p>
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* So when a PircBot is run on a machine that does not run an ident server,
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* it may be necessary to provide a "faked" response by starting up its
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* own ident server and sending out apparently correct responses.
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* <p>
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* An instance of this class can be used to start up an ident server
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* only if it is possible to do so. Reasons for not being able to do
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* so are if there is already an ident server running on port 113, or
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* if you are running as an unprivileged user who is unable to create
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* a server socket on that port number.
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*
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* @since 0.9c
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* @author Paul James Mutton,
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* <a href="http://www.jibble.org/">http://www.jibble.org/</a>
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* @version 1.4.6 (Build time: Wed Apr 11 19:20:59 2007)
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*/
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public class IdentServer extends Thread {
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/**
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* Constructs and starts an instance of an IdentServer that will
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* respond to a client with the provided login. Rather than calling
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* this constructor explicitly from your code, it is recommended that
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* you use the startIdentServer method in the PircBot class.
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* <p>
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* The ident server will wait for up to 60 seconds before shutting
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* down. Otherwise, it will shut down as soon as it has responded
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* to an ident request.
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*
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* @param bot The PircBot instance that will be used to log to.
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* @param login The login that the ident server will respond with.
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*/
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IdentServer(String login) {
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_login = login;
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try {
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_ss = new ServerSocket(113);
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_ss.setSoTimeout(60000);
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}
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catch (Exception e) {
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return;
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}
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this.setName(this.getClass() + "-Thread");
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this.start();
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}
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/**
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* Waits for a client to connect to the ident server before making an
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* appropriate response. Note that this method is started by the class
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* constructor.
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*/
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public void run() {
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try {
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Socket socket = _ss.accept();
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socket.setSoTimeout(60000);
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BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
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BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
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String line = reader.readLine();
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if (line != null) {
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line = line + " : USERID : UNIX : " + _login;
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writer.write(line + "\r\n");
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writer.flush();
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writer.close();
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}
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}
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catch (Exception e) {
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// We're not really concerned with what went wrong, are we?
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}
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try {
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_ss.close();
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}
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catch (Exception e) {
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// Doesn't really matter...
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}
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}
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private String _login;
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private ServerSocket _ss = null;
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}
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