1 | package nu.fw.jeti.plugins.filetransfer.socks5.jsocks; |
---|
2 | import java.io.IOException; |
---|
3 | import java.io.InputStream; |
---|
4 | import java.io.InterruptedIOException; |
---|
5 | import java.io.OutputStream; |
---|
6 | import java.net.InetAddress; |
---|
7 | import java.net.Socket; |
---|
8 | import java.net.UnknownHostException; |
---|
9 | |
---|
10 | /** |
---|
11 | Abstract class Proxy, base for classes Socks4Proxy and Socks5Proxy. |
---|
12 | Defines methods for specifying default proxy, to be |
---|
13 | used by all classes of this package. |
---|
14 | */ |
---|
15 | |
---|
16 | public abstract class Proxy{ |
---|
17 | |
---|
18 | //Data members |
---|
19 | protected InetRange directHosts = new InetRange(); |
---|
20 | |
---|
21 | protected InetAddress proxyIP = null; |
---|
22 | protected String proxyHost = null; |
---|
23 | protected int proxyPort; |
---|
24 | protected Socket proxySocket = null; |
---|
25 | |
---|
26 | protected InputStream in; |
---|
27 | protected OutputStream out; |
---|
28 | |
---|
29 | protected int version; |
---|
30 | |
---|
31 | protected Proxy chainProxy = null; |
---|
32 | |
---|
33 | |
---|
34 | //Protected static/class variables |
---|
35 | protected static Proxy defaultProxy = null; |
---|
36 | |
---|
37 | //Constructors |
---|
38 | //==================== |
---|
39 | Proxy(Proxy chainProxy, |
---|
40 | String proxyHost,int proxyPort)throws UnknownHostException{ |
---|
41 | this.chainProxy = chainProxy; |
---|
42 | this.proxyHost = proxyHost; |
---|
43 | |
---|
44 | if(chainProxy == null) |
---|
45 | this.proxyIP = InetAddress.getByName(proxyHost); |
---|
46 | |
---|
47 | this.proxyPort = proxyPort; |
---|
48 | } |
---|
49 | |
---|
50 | |
---|
51 | Proxy(String proxyHost,int proxyPort)throws UnknownHostException{ |
---|
52 | this(null,proxyHost,proxyPort); |
---|
53 | } |
---|
54 | |
---|
55 | Proxy(Proxy chainProxy,InetAddress proxyIP,int proxyPort){ |
---|
56 | this.chainProxy = chainProxy; |
---|
57 | this.proxyIP = proxyIP; |
---|
58 | this.proxyPort = proxyPort; |
---|
59 | } |
---|
60 | |
---|
61 | Proxy(InetAddress proxyIP,int proxyPort){ |
---|
62 | this(null,proxyIP,proxyPort); |
---|
63 | } |
---|
64 | |
---|
65 | Proxy(Proxy p){ |
---|
66 | this.proxyIP = p.proxyIP; |
---|
67 | this.proxyPort = p.proxyPort; |
---|
68 | this.version = p.version; |
---|
69 | this.directHosts = p.directHosts; |
---|
70 | } |
---|
71 | |
---|
72 | //Public instance methods |
---|
73 | //======================== |
---|
74 | |
---|
75 | /** |
---|
76 | Get the port on which proxy server is running. |
---|
77 | * @return Proxy port. |
---|
78 | */ |
---|
79 | public int getPort(){ |
---|
80 | return proxyPort; |
---|
81 | } |
---|
82 | /** |
---|
83 | Get the ip address of the proxy server host. |
---|
84 | * @return Proxy InetAddress. |
---|
85 | */ |
---|
86 | public InetAddress getInetAddress(){ |
---|
87 | return proxyIP; |
---|
88 | } |
---|
89 | /** |
---|
90 | * Adds given ip to the list of direct addresses. |
---|
91 | * This machine will be accessed without using proxy. |
---|
92 | */ |
---|
93 | public void addDirect(InetAddress ip){ |
---|
94 | directHosts.add(ip); |
---|
95 | } |
---|
96 | /** |
---|
97 | * Adds host to the list of direct addresses. |
---|
98 | * This machine will be accessed without using proxy. |
---|
99 | */ |
---|
100 | public boolean addDirect(String host){ |
---|
101 | return directHosts.add(host); |
---|
102 | } |
---|
103 | /** |
---|
104 | * Adds given range of addresses to the lsit of direct addresses, |
---|
105 | * machines within this range will be accessed without using proxy. |
---|
106 | */ |
---|
107 | public void addDirect(InetAddress from,InetAddress to){ |
---|
108 | directHosts.add(from,to); |
---|
109 | } |
---|
110 | /** |
---|
111 | * Sets given InetRange as the list of direct address, previous |
---|
112 | * list will be discarded, any changes done previously with |
---|
113 | * addDirect(Inetaddress) will be lost. |
---|
114 | * The machines in this range will be accessed without using proxy. |
---|
115 | * @param ir InetRange which should be used to look up direct addresses. |
---|
116 | * @see InetRange |
---|
117 | */ |
---|
118 | public void setDirect(InetRange ir){ |
---|
119 | directHosts = ir; |
---|
120 | } |
---|
121 | |
---|
122 | /** |
---|
123 | Get the list of direct hosts. |
---|
124 | * @return Current range of direct address as InetRange object. |
---|
125 | * @see InetRange |
---|
126 | */ |
---|
127 | public InetRange getDirect(){ |
---|
128 | return directHosts; |
---|
129 | } |
---|
130 | /** |
---|
131 | Check wether the given host is on the list of direct address. |
---|
132 | @param host Host name to check. |
---|
133 | * @return true if the given host is specified as the direct addresses. |
---|
134 | */ |
---|
135 | public boolean isDirect(String host){ |
---|
136 | return directHosts.contains(host); |
---|
137 | } |
---|
138 | /** |
---|
139 | Check wether the given host is on the list of direct addresses. |
---|
140 | @param host Host address to check. |
---|
141 | * @return true if the given host is specified as the direct address. |
---|
142 | */ |
---|
143 | public boolean isDirect(InetAddress host){ |
---|
144 | return directHosts.contains(host); |
---|
145 | } |
---|
146 | /** |
---|
147 | Set the proxy which should be used to connect to given proxy. |
---|
148 | @param chainProxy Proxy to use to connect to this proxy. |
---|
149 | */ |
---|
150 | public void setChainProxy(Proxy chainProxy){ |
---|
151 | this.chainProxy = chainProxy; |
---|
152 | } |
---|
153 | |
---|
154 | /** |
---|
155 | Get proxy which is used to connect to this proxy. |
---|
156 | @return Proxy which is used to connect to this proxy, or null |
---|
157 | if proxy is to be contacted directly. |
---|
158 | */ |
---|
159 | public Proxy getChainProxy(){ |
---|
160 | return chainProxy; |
---|
161 | } |
---|
162 | |
---|
163 | /** |
---|
164 | Get string representation of this proxy. |
---|
165 | * @returns string in the form:proxyHost:proxyPort \t Version versionNumber |
---|
166 | */ |
---|
167 | public String toString(){ |
---|
168 | return (""+proxyIP.getHostName()+":"+proxyPort+"\tVersion "+version); |
---|
169 | } |
---|
170 | |
---|
171 | |
---|
172 | //Public Static(Class) Methods |
---|
173 | //============================== |
---|
174 | |
---|
175 | |
---|
176 | |
---|
177 | |
---|
178 | /** |
---|
179 | * Sets SOCKS5 proxy as default. |
---|
180 | * Default proxy only supports no-authentication. |
---|
181 | @param hostName Host name on which SOCKS5 server is running. |
---|
182 | @param port Port on which SOCKS5 server is running. |
---|
183 | */ |
---|
184 | public static void setDefaultProxy(String hostName,int port) |
---|
185 | throws UnknownHostException{ |
---|
186 | defaultProxy = new Socks5Proxy(hostName,port); |
---|
187 | } |
---|
188 | /** |
---|
189 | * Sets SOCKS5 proxy as default. |
---|
190 | * Default proxy only supports no-authentication. |
---|
191 | @param ipAddress Host address on which SOCKS5 server is running. |
---|
192 | @param port Port on which SOCKS5 server is running. |
---|
193 | */ |
---|
194 | public static void setDefaultProxy(InetAddress ipAddress,int port){ |
---|
195 | defaultProxy = new Socks5Proxy(ipAddress,port); |
---|
196 | } |
---|
197 | /** |
---|
198 | * Sets default proxy. |
---|
199 | @param p Proxy to use as default proxy. |
---|
200 | */ |
---|
201 | public static void setDefaultProxy(Proxy p){ |
---|
202 | defaultProxy = p; |
---|
203 | } |
---|
204 | |
---|
205 | /** |
---|
206 | Get current default proxy. |
---|
207 | * @return Current default proxy, or null if none is set. |
---|
208 | */ |
---|
209 | public static Proxy getDefaultProxy(){ |
---|
210 | return defaultProxy; |
---|
211 | } |
---|
212 | |
---|
213 | |
---|
214 | |
---|
215 | //Protected Methods |
---|
216 | //================= |
---|
217 | |
---|
218 | protected void startSession()throws SocksException{ |
---|
219 | try{ |
---|
220 | if(chainProxy == null) |
---|
221 | proxySocket = new Socket(proxyIP,proxyPort); |
---|
222 | else if(proxyIP != null) |
---|
223 | proxySocket = new SocksSocket(chainProxy,proxyIP,proxyPort); |
---|
224 | else |
---|
225 | proxySocket = new SocksSocket(chainProxy,proxyHost,proxyPort); |
---|
226 | |
---|
227 | in = proxySocket.getInputStream(); |
---|
228 | out = proxySocket.getOutputStream(); |
---|
229 | }catch(SocksException se){ |
---|
230 | throw se; |
---|
231 | }catch(IOException io_ex){ |
---|
232 | throw new SocksException(SOCKS_PROXY_IO_ERROR,""+io_ex); |
---|
233 | } |
---|
234 | } |
---|
235 | |
---|
236 | protected abstract Proxy copy(); |
---|
237 | protected abstract ProxyMessage formMessage(int cmd,InetAddress ip,int port); |
---|
238 | protected abstract ProxyMessage formMessage(int cmd,String host,int port) |
---|
239 | throws UnknownHostException; |
---|
240 | protected abstract ProxyMessage formMessage(InputStream in) |
---|
241 | throws SocksException, |
---|
242 | IOException; |
---|
243 | |
---|
244 | |
---|
245 | protected ProxyMessage connect(InetAddress ip,int port) |
---|
246 | throws SocksException{ |
---|
247 | try{ |
---|
248 | startSession(); |
---|
249 | ProxyMessage request = formMessage(SOCKS_CMD_CONNECT, |
---|
250 | ip,port); |
---|
251 | return exchange(request); |
---|
252 | }catch(SocksException se){ |
---|
253 | endSession(); |
---|
254 | throw se; |
---|
255 | } |
---|
256 | } |
---|
257 | protected ProxyMessage connect(String host,int port) |
---|
258 | throws UnknownHostException,SocksException{ |
---|
259 | try{ |
---|
260 | startSession(); |
---|
261 | ProxyMessage request = formMessage(SOCKS_CMD_CONNECT, |
---|
262 | host,port); |
---|
263 | return exchange(request); |
---|
264 | }catch(SocksException se){ |
---|
265 | endSession(); |
---|
266 | throw se; |
---|
267 | } |
---|
268 | } |
---|
269 | |
---|
270 | protected ProxyMessage bind(InetAddress ip,int port) |
---|
271 | throws SocksException{ |
---|
272 | try{ |
---|
273 | startSession(); |
---|
274 | ProxyMessage request = formMessage(SOCKS_CMD_BIND, |
---|
275 | ip,port); |
---|
276 | return exchange(request); |
---|
277 | }catch(SocksException se){ |
---|
278 | endSession(); |
---|
279 | throw se; |
---|
280 | } |
---|
281 | } |
---|
282 | protected ProxyMessage bind(String host,int port) |
---|
283 | throws UnknownHostException,SocksException{ |
---|
284 | try{ |
---|
285 | startSession(); |
---|
286 | ProxyMessage request = formMessage(SOCKS_CMD_BIND, |
---|
287 | host,port); |
---|
288 | return exchange(request); |
---|
289 | }catch(SocksException se){ |
---|
290 | endSession(); |
---|
291 | throw se; |
---|
292 | } |
---|
293 | } |
---|
294 | |
---|
295 | protected ProxyMessage accept() |
---|
296 | throws IOException,SocksException{ |
---|
297 | ProxyMessage msg; |
---|
298 | try{ |
---|
299 | msg = formMessage(in); |
---|
300 | }catch(InterruptedIOException iioe){ |
---|
301 | throw iioe; |
---|
302 | }catch(IOException io_ex){ |
---|
303 | endSession(); |
---|
304 | throw new SocksException(SOCKS_PROXY_IO_ERROR,"While Trying accept:" |
---|
305 | +io_ex); |
---|
306 | } |
---|
307 | return msg; |
---|
308 | } |
---|
309 | |
---|
310 | protected ProxyMessage udpAssociate(InetAddress ip,int port) |
---|
311 | throws SocksException{ |
---|
312 | try{ |
---|
313 | startSession(); |
---|
314 | ProxyMessage request = formMessage(SOCKS_CMD_UDP_ASSOCIATE, |
---|
315 | ip,port); |
---|
316 | if(request != null) |
---|
317 | return exchange(request); |
---|
318 | }catch(SocksException se){ |
---|
319 | endSession(); |
---|
320 | throw se; |
---|
321 | } |
---|
322 | //Only get here if request was null |
---|
323 | endSession(); |
---|
324 | throw new SocksException(SOCKS_METHOD_NOTSUPPORTED, |
---|
325 | "This version of proxy does not support UDP associate, use version 5"); |
---|
326 | } |
---|
327 | protected ProxyMessage udpAssociate(String host,int port) |
---|
328 | throws UnknownHostException,SocksException{ |
---|
329 | try{ |
---|
330 | startSession(); |
---|
331 | ProxyMessage request = formMessage(SOCKS_CMD_UDP_ASSOCIATE, |
---|
332 | host,port); |
---|
333 | if(request != null) return exchange(request); |
---|
334 | }catch(SocksException se){ |
---|
335 | endSession(); |
---|
336 | throw se; |
---|
337 | } |
---|
338 | //Only get here if request was null |
---|
339 | endSession(); |
---|
340 | throw new SocksException(SOCKS_METHOD_NOTSUPPORTED, |
---|
341 | "This version of proxy does not support UDP associate, use version 5"); |
---|
342 | } |
---|
343 | |
---|
344 | |
---|
345 | protected void endSession(){ |
---|
346 | try{ |
---|
347 | if(proxySocket!=null) proxySocket.close(); |
---|
348 | proxySocket = null; |
---|
349 | }catch(IOException io_ex){ |
---|
350 | } |
---|
351 | } |
---|
352 | |
---|
353 | /** |
---|
354 | *Sends the request to SOCKS server |
---|
355 | */ |
---|
356 | protected void sendMsg(ProxyMessage msg)throws SocksException, |
---|
357 | IOException{ |
---|
358 | msg.write(out); |
---|
359 | } |
---|
360 | |
---|
361 | /** |
---|
362 | * Reads the reply from the SOCKS server |
---|
363 | */ |
---|
364 | protected ProxyMessage readMsg()throws SocksException, |
---|
365 | IOException{ |
---|
366 | return formMessage(in); |
---|
367 | } |
---|
368 | /** |
---|
369 | *Sends the request reads reply and returns it |
---|
370 | *throws exception if something wrong with IO |
---|
371 | *or the reply code is not zero |
---|
372 | */ |
---|
373 | protected ProxyMessage exchange(ProxyMessage request) |
---|
374 | throws SocksException{ |
---|
375 | ProxyMessage reply; |
---|
376 | try{ |
---|
377 | request.write(out); |
---|
378 | reply = formMessage(in); |
---|
379 | }catch(SocksException s_ex){ |
---|
380 | throw s_ex; |
---|
381 | }catch(IOException ioe){ |
---|
382 | throw(new SocksException(SOCKS_PROXY_IO_ERROR,""+ioe)); |
---|
383 | } |
---|
384 | return reply; |
---|
385 | } |
---|
386 | |
---|
387 | |
---|
388 | //Private methods |
---|
389 | //=============== |
---|
390 | |
---|
391 | |
---|
392 | //Constants |
---|
393 | |
---|
394 | public static final int SOCKS_SUCCESS =0; |
---|
395 | public static final int SOCKS_FAILURE =1; |
---|
396 | public static final int SOCKS_BADCONNECT =2; |
---|
397 | public static final int SOCKS_BADNETWORK =3; |
---|
398 | public static final int SOCKS_HOST_UNREACHABLE =4; |
---|
399 | public static final int SOCKS_CONNECTION_REFUSED =5; |
---|
400 | public static final int SOCKS_TTL_EXPIRE =6; |
---|
401 | public static final int SOCKS_CMD_NOT_SUPPORTED =7; |
---|
402 | public static final int SOCKS_ADDR_NOT_SUPPORTED =8; |
---|
403 | |
---|
404 | public static final int SOCKS_NO_PROXY =1<<16; |
---|
405 | public static final int SOCKS_PROXY_NO_CONNECT =2<<16; |
---|
406 | public static final int SOCKS_PROXY_IO_ERROR =3<<16; |
---|
407 | public static final int SOCKS_AUTH_NOT_SUPPORTED =4<<16; |
---|
408 | public static final int SOCKS_AUTH_FAILURE =5<<16; |
---|
409 | public static final int SOCKS_JUST_ERROR =6<<16; |
---|
410 | |
---|
411 | public static final int SOCKS_DIRECT_FAILED =7<<16; |
---|
412 | public static final int SOCKS_METHOD_NOTSUPPORTED =8<<16; |
---|
413 | |
---|
414 | |
---|
415 | static final int SOCKS_CMD_CONNECT =0x1; |
---|
416 | static final int SOCKS_CMD_BIND =0x2; |
---|
417 | static final int SOCKS_CMD_UDP_ASSOCIATE =0x3; |
---|
418 | |
---|
419 | } |
---|