Mercurial > 510Connectbot

comparison src/net/sourceforge/jsocks/SocksSocket.java @ 0:0ce5cc452d02

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
initial version
author Carl Byington <carl@five-ten-sg.com>
date Thu, 22 May 2014 10:41:19 -0700
parents
children 205ee2873330
comparison
equal deleted inserted replaced
-1:000000000000 0:0ce5cc452d02
1 package net.sourceforge.jsocks;
2
3 import java.net.*;
4 import java.io.*;
5
6 /**
7 * SocksSocket tryies to look very similar to normal Socket,
8 * while allowing connections through the SOCKS4 or 5 proxy.
9 * To use this class you will have to identify proxy you need
10 * to use, Proxy class allows you to set default proxy, which
11 * will be used by all Socks aware sockets. You can also create
12 * either Socks4Proxy or Socks5Proxy, and use them by passing to the
13 * appropriate constructors.
14 * <P>
15 * Using Socks package can be as easy as that:
16 *
17 * <pre><tt>
18 *
19 * import Socks.*;
20 * ....
21 *
22 * try{
23 * //Specify SOCKS5 proxy
24 * Proxy.setDefaultProxy("socks-proxy",1080);
25 *
26 * //OR you still use SOCKS4
27 * //Code below uses SOCKS4 proxy
28 * //Proxy.setDefaultProxy("socks-proxy",1080,userName);
29 *
30 * Socket s = SocksSocket("some.host.of.mine",13);
31 * readTimeFromSock(s);
32 * }catch(SocksException sock_ex){
33 * //Usually it will turn in more or less meaningfull message
34 * System.err.println("SocksException:"+sock_ex);
35 * }
36 *
37 * </tt></pre>
38 *<P>
39 * However if the need exist for more control, like resolving addresses
40 * remotely, or using some non-trivial authentication schemes, it can be done.
41 */
42
43 public class SocksSocket extends Socket {
44 //Data members
45 protected Proxy proxy;
46 protected String localHost, remoteHost;
47 protected InetAddress localIP, remoteIP;
48 protected int localPort, remotePort;
49
50 private Socket directSock = null;
51
52 /**
53 * Tryies to connect to given host and port
54 * using default proxy. If no default proxy speciefied
55 * it throws SocksException with error code SOCKS_NO_PROXY.
56 @param host Machine to connect to.
57 @param port Port to which to connect.
58 * @see SocksSocket#SocksSocket(Proxy,String,int)
59 * @see Socks5Proxy#resolveAddrLocally
60 */
61 public SocksSocket(String host, int port)
62 throws SocksException, UnknownHostException {
63 this(Proxy.defaultProxy, host, port);
64 }
65 /**
66 * Connects to host port using given proxy server.
67 @param p Proxy to use.
68 @param host Machine to connect to.
69 @param port Port to which to connect.
70 @throws UnknownHostException
71 If one of the following happens:
72 <ol>
73
74 <li> Proxy settings say that address should be resolved locally, but
75 this fails.
76 <li> Proxy settings say that the host should be contacted directly but
77 host name can't be resolved.
78 </ol>
79 @throws SocksException
80 If one of the following happens:
81 <ul>
82 <li> Proxy is is null.
83 <li> Proxy settings say that the host should be contacted directly but
84 this fails.
85 <li> Socks Server can't be contacted.
86 <li> Authentication fails.
87 <li> Connection is not allowed by the SOCKS proxy.
88 <li> SOCKS proxy can't establish the connection.
89 <li> Any IO error occured.
90 <li> Any protocol error occured.
91 </ul>
92 @throws IOexception if anything is wrong with I/O.
93 @see Socks5Proxy#resolveAddrLocally
94 */
95 public SocksSocket(Proxy p, String host, int port) throws SocksException,
96 UnknownHostException {
97 remoteHost = host;
98 remotePort = port;
99 remoteIP = InetAddress.getByName(host);
100 doDirect();
101 }
102
103 /**
104 Connects to given ip and port using given Proxy server.
105 @param p Proxy to use.
106 @param ip Machine to connect to.
107 @param port Port to which to connect.
108
109 */
110 public SocksSocket(InetAddress ip, int port) throws SocksException {
111 this.remoteIP = ip;
112 this.remotePort = port;
113 this.remoteHost = ip.getHostName();
114 doDirect();
115 }
116
117
118 /**
119 * These 2 constructors are used by the SocksServerSocket.
120 * This socket simply overrides remoteHost, remotePort
121 */
122 protected SocksSocket(String host, int port, Proxy proxy) {
123 this.remotePort = port;
124 this.proxy = proxy;
125 this.localIP = proxy.proxySocket.getLocalAddress();
126 this.localPort = proxy.proxySocket.getLocalPort();
127 this.remoteHost = host;
128 }
129 protected SocksSocket(InetAddress ip, int port, Proxy proxy) {
130 remoteIP = ip;
131 remotePort = port;
132 this.proxy = proxy;
133 this.localIP = proxy.proxySocket.getLocalAddress();
134 this.localPort = proxy.proxySocket.getLocalPort();
135 remoteHost = remoteIP.getHostName();
136 }
137
138 /**
139 * Same as Socket
140 */
141 public void close() throws IOException {
142 if (proxy != null)proxy.endSession();
143
144 proxy = null;
145 }
146 /**
147 * Same as Socket
148 */
149 public InputStream getInputStream() {
150 return proxy.in;
151 }
152 /**
153 * Same as Socket
154 */
155 public OutputStream getOutputStream() {
156 return proxy.out;
157 }
158 /**
159 * Same as Socket
160 */
161 public int getPort() {
162 return remotePort;
163 }
164 /**
165 * Returns remote host name, it is usefull in cases when addresses
166 * are resolved by proxy, and we can't create InetAddress object.
167 @return The name of the host this socket is connected to.
168 */
169 public String getHost() {
170 return remoteHost;
171 }
172 /**
173 * Get remote host as InetAddress object, might return null if
174 * addresses are resolved by proxy, and it is not possible to resolve
175 * it locally
176 @return Ip address of the host this socket is connected to, or null
177 if address was returned by the proxy as DOMAINNAME and can't be
178 resolved locally.
179 */
180 public InetAddress getInetAddress() {
181 if (remoteIP == null) {
182 try {
183 remoteIP = InetAddress.getByName(remoteHost);
184 }
185 catch (UnknownHostException e) {
186 return null;
187 }
188 }
189
190 return remoteIP;
191 }
192
193 /**
194 * Get the port assigned by the proxy for the socket, not
195 * the port on locall machine as in Socket.
196 @return Port of the socket used on the proxy server.
197 */
198 public int getLocalPort() {
199 return localPort;
200 }
201
202 /**
203 * Get address assigned by proxy to make a remote connection,
204 * it might be different from the host specified for the proxy.
205 * Can return null if socks server returned this address as hostname
206 * and it can't be resolved locally, use getLocalHost() then.
207 @return Address proxy is using to make a connection.
208 */
209 public InetAddress getLocalAddress() {
210 if (localIP == null) {
211 try {
212 localIP = InetAddress.getByName(localHost);
213 }
214 catch (UnknownHostException e) {
215 return null;
216 }
217 }
218
219 return localIP;
220 }
221 /**
222 Get name of the host, proxy has assigned to make a remote connection
223 for this socket. This method is usefull when proxy have returned
224 address as hostname, and we can't resolve it on this machine.
225 @return The name of the host proxy is using to make a connection.
226 */
227 public String getLocalHost() {
228 return localHost;
229 }
230
231 /**
232 Same as socket.
233 */
234 public void setSoLinger(boolean on, int val) throws SocketException {
235 proxy.proxySocket.setSoLinger(on, val);
236 }
237 /**
238 Same as socket.
239 */
240 public int getSoLinger(int timeout) throws SocketException {
241 return proxy.proxySocket.getSoLinger();
242 }
243 /**
244 Same as socket.
245 */
246 public void setSoTimeout(int timeout) throws SocketException {
247 proxy.proxySocket.setSoTimeout(timeout);
248 }
249 /**
250 Same as socket.
251 */
252 public int getSoTimeout(int timeout) throws SocketException {
253 return proxy.proxySocket.getSoTimeout();
254 }
255 /**
256 Same as socket.
257 */
258 public void setTcpNoDelay(boolean on) throws SocketException {
259 proxy.proxySocket.setTcpNoDelay(on);
260 }
261 /**
262 Same as socket.
263 */
264 public boolean getTcpNoDelay() throws SocketException {
265 return proxy.proxySocket.getTcpNoDelay();
266 }
267
268 /**
269 Get string representation of the socket.
270 */
271 public String toString() {
272 if (directSock != null) return "Direct connection:" + directSock;
273
274 return ("Proxy:" + proxy + ";" + "addr:" + remoteHost + ",port:" + remotePort
275 + ",localport:" + localPort);
276 }
277
278 //Private Methods
279 //////////////////
280
281 private void doDirect()throws SocksException {
282 try {
283 //System.out.println("IP:"+remoteIP+":"+remotePort);
284 directSock = new Socket(remoteIP, remotePort);
285 proxy.out = directSock.getOutputStream();
286 proxy.in = directSock.getInputStream();
287 proxy.proxySocket = directSock;
288 localIP = directSock.getLocalAddress();
289 localPort = directSock.getLocalPort();
290 }
291 catch (IOException io_ex) {
292 throw new SocksException(Proxy.SOCKS_DIRECT_FAILED,
293 "Direct connect failed:" + io_ex);
294 }
295 }
296
297 }