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/cvs/cf.schmorp.de/proxy/Client.cs
Revision: 1.1
Committed: Mon Nov 5 20:08:44 2012 UTC (11 years, 7 months ago) by sf-demisephi
Branch: MAIN
CVS Tags: HEAD
Log Message:
added proxy to repository

File Contents

# Content
1
2 using System;
3 using System.Linq;
4 using System.IO;
5 using System.Net;
6 using System.Text;
7 using System.Net.Sockets;
8 using System.Threading;
9 using System.Collections;
10 using System.Collections.Generic;
11 using System.Security.Cryptography;
12 using System.Runtime.Serialization.Formatters.Binary;
13 using System.Text.RegularExpressions;
14
15 namespace _olbaid_websockets
16 {
17
18 class UnPack {
19
20 byte [] buffer;
21 public int position;
22
23 public UnPack(byte[] b){
24 buffer = b;
25 position = 0;
26 }
27
28 public uint w (){
29 uint num = 0;
30 byte bite = 0;
31 do {
32 num*=128;
33 bite = buffer[position++];
34 num+=(uint)(bite&0x7f);
35 }while ((bite&0x80)>0);
36 return num;
37 }
38 }
39 class Client
40 {
41 private Socket client;
42 private Thread thread;
43 private Socket deliantraClient = null;
44 private bool upgraded = false;
45 private bool mask = true;
46 private bool useHixie = false;
47
48 Random r = new Random();
49
50 System.Text.UTF8Encoding encodingUTF8 = new System.Text.UTF8Encoding();
51
52
53 private byte[] buffer = new byte[4096*16];
54 private byte[] mergedBuffer = new byte[4096*32];
55 private int mergedBufferLength = 0;
56
57 public bool IsBitSet(byte b, int pos) {
58 return (b & (int)Math.Pow(2, pos)) > 0 ? true : false;
59 }
60
61 public static int getNSpaces (string s){
62 return (new String(s.Where( c=> c==' ').ToArray())).Length;
63 }
64
65 public static Int64 numbers(string s){
66 char[] nums = s.Where( c => Char.IsNumber(c)).ToArray();
67 Int64 ret = Int64.Parse(new String(nums));
68 return ret;
69 }
70
71 public static void setBytes(byte [] buffer,UInt16 val,int index){
72 for (int i=0;i<2;++i){
73 byte b = (byte)((val >> (3-i)*8)&0xff);
74 buffer[index+i] = b;
75 }
76 }
77
78 public static void setBytes(byte [] buffer,UInt32 val,int index){
79 for (int i=0;i<4;++i){
80 byte b = (byte)((val >> (3-i)*8)&0xff);
81 buffer[index+i] = b;
82 }
83 }
84
85 public static void setBytesR(byte [] buffer,UInt16 val,int index){
86 for (int i=1;i>=0;--i){
87 byte b = (byte)((val >> (3-i)*8)&0xff);
88 buffer[index+i] = b;
89 }
90 }
91
92 public static byte [] calcHixieResponse (string key1,string key2,byte [] l8b){
93 UInt64 numbers1 = (UInt64) numbers(key1);
94 UInt64 numbers2 = (UInt64) numbers(key2);
95 UInt64 spaces1 = (ulong)getNSpaces(key1);
96 UInt64 spaces2 = (ulong)getNSpaces(key2);
97 byte [] key = new byte [16];
98
99 Array.Clear(key,0,16);
100
101 setBytes(key,(UInt32)(((numbers1/spaces1))),0);
102 setBytes(key,(UInt32)(((numbers2/spaces2))),4);
103
104 Array.Copy(l8b,0,key,8,8);
105 MD5 md5Hash = MD5.Create();
106 return md5Hash.ComputeHash(key);
107 }
108
109 public static void setBytesR(byte [] buffer,UInt32 val,int index){
110 for (int i=3;i>=0;--i){
111 byte b = (byte)((val >> (3-i)*8)&0xff);
112 buffer[index+i] = b;
113 }
114 }
115 public void onReceivedClientData (IAsyncResult asyn){
116
117 Socket mySocket = (Socket)asyn.AsyncState;
118
119 int bytesRead = mySocket.EndReceive(asyn);
120 if (bytesRead==0){
121 Console.WriteLine ("Connection closed by socket {0}" , mySocket==client?" client " : " deliantra ");
122
123 mySocket.Close();
124
125 if ((mySocket==client)&&(deliantraClient!=null)){
126 client = null;
127 Console.WriteLine ("trying to close deliantraClient");
128 try {
129 deliantraClient.Close();
130 deliantraClient = null;
131 }catch (Exception ex){
132
133 }
134 }
135 return;
136 }
137
138
139 if (mySocket == client){
140 //deliantraClient.Send(buffer,bytesRead,0);
141 Hashtable request = new Hashtable();
142
143 if (upgraded == false){
144 dump(buffer,bytesRead);
145 string incoming = encodingUTF8.GetString(buffer,0,bytesRead);
146
147 Console.WriteLine (incoming);
148
149 string [] lines = incoming.Split(new string [] {"\n"},StringSplitOptions.RemoveEmptyEntries);
150
151 for (int i = 1;i<lines.Length;++i){
152 string [] line = lines[i].Split(new string [] {": "},StringSplitOptions.RemoveEmptyEntries);
153 if (line.Length>=3)
154 request.Add(line[0].ToString().ToLower().Trim(),line[1] + ":" + line[2]);
155 else if (line.Length>=2)
156 request.Add(line[0].ToString().ToLower().Trim(),line[1]);
157
158 }
159 foreach (DictionaryEntry e in request){
160 Console.WriteLine(e.Key.ToString() + " : '" + e.Value.ToString() + "'");
161 }
162
163
164 if (request["sec-websocket-key1"]!=null){
165 string key1 = "357184 636 L0";
166 key1 = request["sec-websocket-key1"].ToString().Trim();
167
168 string key2 = "U 4=> 9&6= 52OeA[8 #880";
169 key2 = request["sec-websocket-key2"].ToString().Trim();
170 byte [] l8b = new byte[8];
171 Array.Copy (buffer,bytesRead-8,l8b,0,8);
172
173 dump(l8b,8);
174
175 byte [] hixiResp = calcHixieResponse(key1,key2,l8b);
176
177 string origin = (string) (request["origin"] != null ? request["origin"].ToString().Trim(): "");
178 //origin="http://localhost";
179 string host = (string) (request["host"] != null ? request["host"].ToString().Trim (): "");
180 string location = Regex.Match(incoming,@"(/[a-z]+)",RegexOptions.IgnoreCase).Value.ToString();
181
182 StringBuilder bResponse = new StringBuilder();
183 bResponse.Append("HTTP/1.1 101 WebSocket Protocol Handshake\r\n");
184 bResponse.Append( "Upgrade: WebSocket\r\n");
185 bResponse.Append("Connection: Upgrade\r\n");
186 bResponse.AppendFormat("Sec-WebSocket-Origin: {0}\r\n",origin);
187 bResponse.Append( "Sec-WebSocket-Protocol: chat\r\n");
188 bResponse.AppendFormat("Sec-WebSocket-Location: ws://{0}{1}\r\n\r\n",host,location);
189 byte [] data = encodingUTF8.GetBytes(bResponse.ToString());
190 byte [] result = new byte[data.Length+hixiResp.Length];
191 Array.Copy(data,0,result,0,data.Length);
192 Array.Copy(hixiResp,0,result,data.Length,hixiResp.Length);
193 client.Send(result,result.Length,SocketFlags.None);
194 useHixie = true;
195 upgraded = true;
196 }else{
197 string key = "";
198 if (request["sec-websocket-key"]!=null){
199 Console.WriteLine("Key: " + request["sec-websocket-key"].ToString());
200 key = request["sec-websocket-key"].ToString().Trim();
201 }else{
202 key = "";
203 }
204 if (request["sec-websocket-extensions"]!=null){
205 mask = false;
206 }
207 Console.WriteLine(key);
208 //key+=Guid.NewGuid().ToString();
209 key+="258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
210 Console.WriteLine(key);
211 SHA1 sha = new SHA1CryptoServiceProvider();
212 byte [] hash = sha.ComputeHash(encoding.GetBytes(key));
213
214 key = EncodeTo64(hash);
215 Console.WriteLine(key);
216 string response = "HTTP/1.1 101 Switching Protocols\n"
217 + "Upgrade: websocket\n"
218 + "Connection: Upgrade\n"
219 //+ "Sec-WebSocket-Protocol: chat\r\n"
220 + "Sec-WebSocket-Accept: " + key +"\n\n";
221 response = "HTTP/1.1 101 WebSocket Protocol Handshake\r\n"
222 + "Upgrade: WebSocket\r\n"
223 + "Connection: Upgrade\r\n"
224 + "Sec-WebSocket-Accept: " +key + "\r\n\r\n";
225 client.Send(encoding.GetBytes(response));
226 upgraded = true;
227 }
228
229 deliantraClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
230 deliantraClient.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
231 IPEndPoint ipLocal = new IPEndPoint(IPAddress.Parse("194.126.175.156"), 13327);
232 deliantraClient.Connect(ipLocal);
233 deliantraClient.BeginReceive(buffer, 0, 4096, 0, new AsyncCallback(onReceivedClientData),deliantraClient);
234
235 }else{
236 //dump (buffer,bytesRead);
237
238 String msg = receiveMessage(buffer,bytesRead);
239 Console.WriteLine(msg);
240 Array.Copy(encodingUTF8.GetBytes(msg),0,buffer,2,bytesRead = encodingUTF8.GetBytes(msg).Length);
241 buffer [0] = (byte)(bytesRead/256);
242 buffer [1] = (byte)(bytesRead%256);
243 deliantraClient.Send(buffer,0,bytesRead+2,0);
244 //Console.WriteLine(encoding.GetString(unmaskedData,0,payloadLen));
245
246 //sendMessage("HELLO CRUEL WORLD");
247
248 }
249
250 }else{
251 //client.Send(buffer,bytesRead,0);
252 //dump (buffer,bytesRead);
253 if (client == null){
254 deliantraClient.Close();
255 deliantraClient = null;
256 return;
257 }
258 Array.Copy ( buffer,0,mergedBuffer,mergedBufferLength,bytesRead);
259 mergedBufferLength += bytesRead;
260
261 int index = 0;
262 int len;
263 byte [] tmpBuffer;
264 while (index<mergedBufferLength){
265 try {
266 len = mergedBuffer[index++]*256 + mergedBuffer[index++];
267 //Console.WriteLine("Index : {0}, len : {1}, mergedBufferLength {2}",index,len,mergedBufferLength);
268
269 if ((len+index)<=mergedBufferLength){
270 //Console.WriteLine("Sending {0}",encodingUTF8.GetString(mergedBuffer,index,len));
271 //sendMessage(encodingUTF8.GetString(mergedBuffer,index,len));
272 tmpBuffer = new byte [len];
273 Array.Copy(mergedBuffer,index,tmpBuffer,0,len);
274 if (encoding.GetString(tmpBuffer,0,2).Equals("ix")){
275 StringBuilder sb = new StringBuilder();
276 UnPack up = new UnPack(tmpBuffer);
277 up.position = 3;
278 uint id = up.w();
279 up.w();
280 sb.Append(id);
281 sb.Append(".png");
282
283 if (!File.Exists("/var/www/olbaid/faces/" + sb.ToString())){
284 BinaryWriter bw = new BinaryWriter(File.OpenWrite("/var/www/olbaid/faces/" + sb.ToString()));
285 bw.Write(tmpBuffer,up.position,len-up.position);
286 bw.Close();
287 }
288 tmpBuffer = new byte [up.position+3];
289 Array.Copy(mergedBuffer,index,tmpBuffer,0,3+up.position);
290
291 }
292 sendMessage(EncodeTo64(tmpBuffer));
293
294 Array.Copy(mergedBuffer,index+len,mergedBuffer,0,mergedBufferLength-len-2);
295 mergedBufferLength -= len + 2;
296 index = 0;
297 }else{
298 break;
299 }
300 }catch (Exception ex){
301 }
302
303 }
304
305 }
306 mySocket.BeginReceive(buffer, 0, 4096, 0, new AsyncCallback(onReceivedClientData),mySocket);
307 }
308
309
310 public string receiveMessage(byte[] buffer,int bytesRead){
311
312
313 if (useHixie){
314 string ret = encodingUTF8.GetString(buffer,1,bytesRead-2);
315 Console.WriteLine(ret);
316 return ret;
317 }
318 UInt64 payloadLen = 0;
319
320 //int opcode = buffer[0]&0xf;
321
322
323 bool mask = IsBitSet(buffer[1],7);
324 if (!mask){
325 //Console.WriteLine("Ignoring non masked message");
326 //return;
327 }
328
329
330 payloadLen = (ulong)(buffer[1]& ~128);
331
332 if (payloadLen==125){
333
334 }else if (payloadLen==126){
335 payloadLen = (ulong)(buffer[2]*256 + buffer[3]);
336 Array.Copy(buffer,4,buffer,2,bytesRead-2);
337 }else if (payloadLen==127){
338 payloadLen = (ulong)(buffer[2]*256*256*256 + buffer[3]*256*256 + buffer[4]*256 + buffer[5]);
339 Array.Copy(buffer,6,buffer,2,bytesRead-2);
340 }
341
342 byte [] maskKey = new byte[]{0,0,0,0};
343
344 if (mask){
345 Array.Copy(buffer,2,maskKey,0,4);
346 }
347
348 byte [] unmaskedData = new byte[payloadLen];
349
350
351 Array.Copy(buffer,6,unmaskedData,0,(int)payloadLen);
352
353 for (int i =0;i<(int)payloadLen;++i){
354 unmaskedData[i]=(byte)(unmaskedData[i]^maskKey[i%4]);
355 }
356 return encodingUTF8.GetString(unmaskedData);
357 }
358 public void sendMessage(byte[] message){
359
360 if (useHixie){
361 byte [] data = new byte[message.Length+2];
362 data[0] = 0;
363 data[message.Length+1] = 255;
364 Array.Copy((message),0,data,1,message.Length);
365 client.Send(data,data.Length,SocketFlags.None);
366 return;
367 }
368 //System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
369 byte [] unmaskedData = (message);
370 int len = unmaskedData.Length;
371 bool big = false;
372 bool bigger = false;
373
374 if (len>256*256+256){
375 bigger = true;
376 }else if (len>125){
377 big = true;
378 }
379
380 byte [] buffer;
381
382 if (bigger){
383 buffer = new byte[len+6+(mask?4:0)];
384 Array.Clear(buffer,0,len+6+(mask?4:0));
385 }else if (big){
386 buffer = new byte[len+4+(mask?4:0)];
387 Array.Clear(buffer,0,len+4+(mask?4:0));
388 }else{
389 buffer = new byte[len+2+(mask?4:0)];
390 Array.Clear(buffer,0,len+2+(mask?4:0));
391 }
392 int optcode = 1;
393 buffer[0] = (byte)(128 + optcode);
394
395 int maskVal = 0;
396
397 if (mask){
398 maskVal = 128;
399 }
400
401 if (bigger){
402 buffer[1] = (byte)(maskVal + 127);
403 buffer[5] = (byte)(len%256);
404 len/=256;
405 buffer[4] = (byte)(len%256);
406 len/=256;
407 buffer[3] = (byte)(len%256);
408 len/=256;
409 buffer[2] = (byte)(len%256);
410 }else if (big){
411 buffer[1] = (byte)(maskVal + 126);
412 buffer[2] = (byte)(len/256);
413 buffer[3] = (byte)(len%256);
414 }else{
415 buffer[1] = (byte)(maskVal + len );
416 }
417
418 if (mask){
419 byte [] maskKey = new byte[4];
420 r.NextBytes(maskKey);
421 if (bigger){
422 Array.Copy(maskKey,0,buffer,6,4);
423 }else if (big){
424 Array.Copy(maskKey,0,buffer,4,4);
425 }else{
426 Array.Copy(maskKey,0,buffer,2,4);
427 }
428 if (bigger){
429 for (int i = 0 ; i<unmaskedData.Length;++i){
430 buffer[10+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
431 }
432 }else if (big){
433 for (int i = 0 ; i<unmaskedData.Length;++i){
434 buffer[8+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
435 }
436 }else{
437 for (int i = 0 ; i<unmaskedData.Length;++i){
438 buffer[6+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
439 }
440 }
441 }else{
442 int offset = 0;
443 if (bigger){
444 offset=6;
445 }else if (big){
446 offset=4;
447 }else{
448 offset=2;
449 }
450 for (int i = 0 ; i<unmaskedData.Length;++i){
451 buffer[offset+i] = (byte)(unmaskedData[i]);
452 }
453 }
454
455 client.Send(buffer);
456
457
458 }
459 public void sendMessage(string message){
460
461 if (useHixie){
462 byte [] data = new byte[message.Length+2];
463 data[0] = 0;
464 data[message.Length+1] = 255;
465 Array.Copy(encodingUTF8.GetBytes(message),0,data,1,message.Length);
466 client.Send(data,data.Length,SocketFlags.None);
467 return;
468 }
469 //System.Text.UTF8Encoding encoding = new System.Text.UTF8Encoding();
470 byte [] unmaskedData = encoding.GetBytes(message);
471 int len = unmaskedData.Length;
472 bool big = false;
473 bool bigger = false;
474
475 if (len>256*256+256){
476 bigger = true;
477 }else if (len>125){
478 big = true;
479 }
480
481 byte [] buffer;
482
483 if (bigger){
484 buffer = new byte[len+6+(mask?4:0)];
485 Array.Clear(buffer,0,len+6+(mask?4:0));
486 }else if (big){
487 buffer = new byte[len+4+(mask?4:0)];
488 Array.Clear(buffer,0,len+4+(mask?4:0));
489 }else{
490 buffer = new byte[len+2+(mask?4:0)];
491 Array.Clear(buffer,0,len+2+(mask?4:0));
492 }
493 int optcode = 1;
494 buffer[0] = (byte)(128 + optcode);
495
496 int maskVal = 0;
497
498 if (mask){
499 maskVal = 128;
500 }
501
502 if (bigger){
503 buffer[1] = (byte)(maskVal + 127);
504 buffer[5] = (byte)(len%256);
505 len/=256;
506 buffer[4] = (byte)(len%256);
507 len/=256;
508 buffer[3] = (byte)(len%256);
509 len/=256;
510 buffer[2] = (byte)(len%256);
511 }else if (big){
512 buffer[1] = (byte)(maskVal + 126);
513 buffer[2] = (byte)(len/256);
514 buffer[3] = (byte)(len%256);
515 }else{
516 buffer[1] = (byte)(maskVal + len );
517 }
518
519 if (mask){
520 byte [] maskKey = new byte[4];
521 r.NextBytes(maskKey);
522 if (bigger){
523 Array.Copy(maskKey,0,buffer,6,4);
524 }else if (big){
525 Array.Copy(maskKey,0,buffer,4,4);
526 }else{
527 Array.Copy(maskKey,0,buffer,2,4);
528 }
529 if (bigger){
530 for (int i = 0 ; i<unmaskedData.Length;++i){
531 buffer[10+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
532 }
533 }else if (big){
534 for (int i = 0 ; i<unmaskedData.Length;++i){
535 buffer[8+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
536 }
537 }else{
538 for (int i = 0 ; i<unmaskedData.Length;++i){
539 buffer[6+i] = (byte)(unmaskedData[i]^maskKey[i%4]);
540 }
541 }
542 }else{
543 int offset = 0;
544 if (bigger){
545 offset=6;
546 }else if (big){
547 offset=4;
548 }else{
549 offset=2;
550 }
551 for (int i = 0 ; i<unmaskedData.Length;++i){
552 buffer[offset+i] = (byte)(unmaskedData[i]);
553 }
554 }
555
556 client.Send(buffer);
557
558
559 }
560 public string EncodeTo64(byte[] toEncode) {
561 byte[] toEncodeAsBytes = toEncode;
562 string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);
563 return returnValue;
564 }
565 public string EncodeTo64(string toEncode) {
566 byte[] toEncodeAsBytes = encoding.GetBytes(toEncode);
567 string returnValue = System.Convert.ToBase64String(toEncodeAsBytes);
568 return returnValue;
569 }
570
571 public Client(Socket client){
572 this.client = client;
573 client.BeginReceive(buffer, 0, 4096, 0, new AsyncCallback(onReceivedClientData),client);
574
575
576 }
577 public void close(){
578 this.client.Close();
579 }
580
581 public void threadfunc (){
582
583 }
584
585
586 public Thread createThread(){
587 thread = new Thread(new ThreadStart(this.threadfunc));
588 return thread;
589 }
590
591 System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding();
592
593 public void dumpBinary (BitArray b,int length){
594 Console.WriteLine("");
595 int counter = 0;
596 for (int i = 0;i<length;++i){
597 if (b[i]){
598 Console.Write(1);
599 }else{
600 Console.Write(0);
601 }
602 if (counter==0){
603 Console.Write(" ");
604 }
605 counter = (counter+1)%4;
606 }
607 Console.WriteLine("");
608 }
609
610 public void dump (byte [] b,int size){
611 Console.WriteLine("{0} bytes received",size);
612 int offset = 0;
613
614 while (offset<size){
615 Console.Write ("{0:X2} ",b[offset]);
616
617 if (offset>0&&offset%16==0){
618
619 Console.Write(encoding.GetString(b,offset-16,16));
620
621 Console.WriteLine();
622 }
623 offset+=1;
624 }
625
626 Console.WriteLine();
627
628 }
629 }
630 }
631