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1 package net.sourceforge.jsocks;
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2
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3 import java.io.IOException;
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4 import java.io.InputStream;
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5 import java.io.OutputStream;
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6 import java.net.InetAddress;
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7 import java.net.UnknownHostException;
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8
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9 /**
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10 Abstract class which describes SOCKS4/5 response/request.
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11 */
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12 public abstract class ProxyMessage {
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13 /** Host as an IP address */
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14 public InetAddress ip = null;
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15 /** SOCKS version, or version of the response for SOCKS4*/
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16 public int version;
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17 /** Port field of the request/response*/
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18 public int port;
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19 /** Request/response code as an int*/
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20 public int command;
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21 /** Host as string.*/
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22 public String host = null;
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23 /** User field for SOCKS4 request messages*/
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24 public String user = null;
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25
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26 ProxyMessage(int command, InetAddress ip, int port) {
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27 this.command = command;
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28 this.ip = ip;
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29 this.port = port;
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30 }
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31
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32 ProxyMessage() {
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33 }
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34
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35
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36 /**
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37 Initialises Message from the stream. Reads server response from
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38 given stream.
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39 @param in Input stream to read response from.
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40 @throws SocksException If server response code is not SOCKS_SUCCESS(0), or
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41 if any error with protocol occurs.
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42 @throws IOException If any error happens with I/O.
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43 */
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44 public abstract void read(InputStream in)
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45 throws SocksException,
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46 IOException;
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47
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48
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49 /**
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50 Initialises Message from the stream. Reads server response or client
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51 request from given stream.
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52
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53 @param in Input stream to read response from.
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54 @param clinetMode If true read server response, else read client request.
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55 @throws SocksException If server response code is not SOCKS_SUCCESS(0) and
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56 reading in client mode, or if any error with protocol occurs.
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57 @throws IOException If any error happens with I/O.
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58 */
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59 public abstract void read(InputStream in, boolean client_mode)
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60 throws SocksException,
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61 IOException;
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62
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63
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64 /**
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65 Writes the message to the stream.
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66 @param out Output stream to which message should be written.
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67 */
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68 public abstract void write(OutputStream out)throws SocksException,
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69 IOException;
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70
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71 /**
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72 Get the Address field of this message as InetAddress object.
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73 @return Host address or null, if one can't be determined.
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74 */
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75 public InetAddress getInetAddress() throws UnknownHostException {
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76 return ip;
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77 }
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78
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79
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80 /**
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81 Get string representaion of this message.
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82 @return string representation of this message.
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83 */
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84 public String toString() {
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85 return
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86 "Proxy Message:\n" +
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87 "Version:" + version + "\n" +
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88 "Command:" + command + "\n" +
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89 "IP: " + ip + "\n" +
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90 "Port: " + port + "\n" +
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91 "User: " + user + "\n" ;
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92 }
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93
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94 //Package methods
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95 //////////////////
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96
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97 static final String bytes2IPV4(byte[] addr, int offset) {
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98 String hostName = "" + (addr[offset] & 0xFF);
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99
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100 for (int i = offset + 1; i < offset + 4; ++i)
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101 hostName += "." + (addr[i] & 0xFF);
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102
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103 return hostName;
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104 }
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105
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106 static final String bytes2IPV6(byte[] addr, int offset) {
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107 //Have no idea how they look like!
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108 return null;
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109 }
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110
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111 }
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