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1 package net.sourceforge.jsocks;
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2 import java.io.IOException;
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3 import java.io.InputStream;
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4 import java.net.InetAddress;
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5 import java.net.UnknownHostException;
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6
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7 /**
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8 Proxy which describes SOCKS4 proxy.
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9 */
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10
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11 public class Socks4Proxy extends Proxy implements Cloneable {
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12
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13 //Data members
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14 String user;
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15
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16 //Public Constructors
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17 //====================
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18
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19 /**
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20 Creates the SOCKS4 proxy
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21 @param p Proxy to use to connect to this proxy, allows proxy chaining.
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22 @param proxyHost Address of the proxy server.
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23 @param proxyPort Port of the proxy server
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24 @param user User name to use for identification purposes.
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25 @throws UnknownHostException If proxyHost can't be resolved.
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26 */
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27 public Socks4Proxy(String proxyHost, int proxyPort, String user)
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28 throws UnknownHostException {
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29 super(proxyHost, proxyPort);
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30 this.user = new String(user);
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31 version = 4;
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32 }
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33
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34 /**
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35 Creates the SOCKS4 proxy
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36 @param p Proxy to use to connect to this proxy, allows proxy chaining.
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37 @param proxyIP Address of the proxy server.
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38 @param proxyPort Port of the proxy server
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39 @param user User name to use for identification purposes.
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40 */
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41 public Socks4Proxy(Proxy p, InetAddress proxyIP, int proxyPort, String user) {
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42 super(p, proxyIP, proxyPort);
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43 this.user = new String(user);
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44 version = 4;
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45 }
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46
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47 /**
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48 Creates the SOCKS4 proxy
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49 @param proxyIP Address of the proxy server.
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50 @param proxyPort Port of the proxy server
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51 @param user User name to use for identification purposes.
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52 */
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53 public Socks4Proxy(InetAddress proxyIP, int proxyPort, String user) {
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54 this(null, proxyIP, proxyPort, user);
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55 }
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56
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57 //Public instance methods
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58 //========================
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59
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60 /**
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61 * Creates a clone of this proxy. Changes made to the clone should not
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62 * affect this object.
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63 */
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64 public Object clone() {
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65 Socks4Proxy newProxy = new Socks4Proxy(proxyIP, proxyPort, user);
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66 newProxy.chainProxy = chainProxy;
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67 return newProxy;
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68 }
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69
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70
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71 //Public Static(Class) Methods
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72 //==============================
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73
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74
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75 //Protected Methods
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76 //=================
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77
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78 protected Proxy copy() {
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79 Socks4Proxy copy = new Socks4Proxy(proxyIP, proxyPort, user);
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80 copy.chainProxy = chainProxy;
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81 return copy;
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82 }
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83
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84 protected ProxyMessage formMessage(int cmd, InetAddress ip, int port) {
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85 switch (cmd) {
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86 case SOCKS_CMD_CONNECT:
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87 cmd = Socks4Message.REQUEST_CONNECT;
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88 break;
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89
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90 case SOCKS_CMD_BIND:
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91 cmd = Socks4Message.REQUEST_BIND;
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92 break;
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93
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94 default:
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95 return null;
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96 }
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97
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98 return new Socks4Message(cmd, ip, port, user);
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99 }
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100 protected ProxyMessage formMessage(int cmd, String host, int port)
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101 throws UnknownHostException {
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102 return formMessage(cmd, InetAddress.getByName(host), port);
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103 }
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104 protected ProxyMessage formMessage(InputStream in)
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105 throws SocksException,
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106 IOException {
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107 return new Socks4Message(in, true);
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108 }
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109
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110 }
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