summaryrefslogtreecommitdiffstats
path: root/tdecore/network/ksockssocketdevice.cpp
blob: c1649c3408eac7a7201b6b760f6b24da53563e69 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
/*  -*- C++ -*-
 *  Copyright (C) 2004 Thiago Macieira <thiago.macieira@kdemail.net>
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public License
 *  along with this library; see the file COPYING.LIB.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA 02110-1301, USA.
 */

#include <config.h>

#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>

#if defined(HAVE_UNISTD_H)
#include <unistd.h>
#endif

#ifdef __CYGWIN__
#undef kde_socklen_t 
#define kde_socklen_t ksocklen_t 
#endif 

#include "kapplication.h"

#include "ksocks.h"
#include "tdesocketaddress.h"
#include "kresolver.h"
#include "ksockssocketdevice.h"

using namespace KNetwork;

// constructor
// nothing to do
KSocksSocketDevice::KSocksSocketDevice(const TDESocketBase* obj)
  : TDESocketDevice(obj)
{
}

// constructor with argument
// nothing to do
KSocksSocketDevice::KSocksSocketDevice(int fd)
  : TDESocketDevice(fd)
{
}

// destructor
// also nothing to do
KSocksSocketDevice::~KSocksSocketDevice()
{
}

// returns the capabilities
int KSocksSocketDevice::capabilities() const
{
  return 0;			// can do everything!
}

// From here on, the code is almost exactly a copy of TDESocketDevice
// the differences are the use of KSocks where appropriate

bool KSocksSocketDevice::bind(const KResolverEntry& address)
{
  resetError();

  if (m_sockfd == -1 && !create(address))
    return false;		// failed creating

  // we have a socket, so try and bind
  if (KSocks::self()->bind(m_sockfd, address.address(), address.length()) == -1)
    {
      if (errno == EADDRINUSE)
	setError(IO_BindError, AddressInUse);
      else if (errno == EINVAL)
	setError(IO_BindError, AlreadyBound);
      else
	// assume the address is the cause
	setError(IO_BindError, NotSupported);
      return false;
    }

  return true;
}


bool KSocksSocketDevice::listen(int backlog)
{
  if (m_sockfd != -1)
    {
      if (KSocks::self()->listen(m_sockfd, backlog) == -1)
	{
	  setError(IO_ListenError, NotSupported);
	  return false;
	}

      resetError();
      setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
      setState(IO_Open);
      return true;
    }

  // we don't have a socket
  // can't listen
  setError(IO_ListenError, NotCreated);
  return false;
}

bool KSocksSocketDevice::connect(const KResolverEntry& address)
{
  resetError();

  if (m_sockfd == -1 && !create(address))
    return false;		// failed creating!

  int retval;
  if (KSocks::self()->hasWorkingAsyncConnect())
    retval = KSocks::self()->connect(m_sockfd, address.address(), 
				     address.length());
  else
    {
      // work around some SOCKS implementation bugs
      // we will do a *synchronous* connection here!
      // FIXME: KDE4, write a proper SOCKS implementation
      bool isBlocking = blocking();
      setBlocking(true);
      retval = KSocks::self()->connect(m_sockfd, address.address(), 
				       address.length());
      setBlocking(isBlocking);
    }

  if (retval == -1)
    {
      if (errno == EISCONN)
	return true;		// we're already connected
      else if (errno == EALREADY || errno == EINPROGRESS)
	{
	  setError(IO_ConnectError, InProgress);
	  return true;
	}
      else if (errno == ECONNREFUSED)
	setError(IO_ConnectError, ConnectionRefused);
      else if (errno == ENETDOWN || errno == ENETUNREACH ||
	       errno == ENETRESET || errno == ECONNABORTED ||
	       errno == ECONNRESET || errno == EHOSTDOWN ||
	       errno == EHOSTUNREACH)
	setError(IO_ConnectError, NetFailure);
      else
	setError(IO_ConnectError, NotSupported);

      return false;
    }

  setFlags(IO_Sequential | IO_Raw | IO_ReadWrite);
  setState(IO_Open);
  return true;			// all is well
}

KSocksSocketDevice* KSocksSocketDevice::accept()
{
  if (m_sockfd == -1)
    {
      // can't accept without a socket
      setError(IO_AcceptError, NotCreated);
      return 0L;
    }

  struct sockaddr sa;
  kde_socklen_t len = sizeof(sa);
  int newfd = KSocks::self()->accept(m_sockfd, &sa, &len);
  if (newfd == -1)
    {
      if (errno == EAGAIN || errno == EWOULDBLOCK)
	setError(IO_AcceptError, WouldBlock);
      else
	setError(IO_AcceptError, UnknownError);
      return NULL;
    }

  return new KSocksSocketDevice(newfd);
}

static int socks_read_common(int sockfd, char *data, TQ_ULONG maxlen, TDESocketAddress* from, ssize_t &retval, bool peek = false)
{
  kde_socklen_t len;
  if (from)
    {
      from->setLength(len = 128); // arbitrary length
      retval = KSocks::self()->recvfrom(sockfd, data, maxlen, peek ? MSG_PEEK : 0, from->address(), &len);
    }
  else
    retval = KSocks::self()->recvfrom(sockfd, data, maxlen, peek ? MSG_PEEK : 0, NULL, NULL);

  if (retval == -1)
    {
      if (errno == EAGAIN || errno == EWOULDBLOCK)
	return TDESocketDevice::WouldBlock;
      else
	return TDESocketDevice::UnknownError;
    }

  if (from)
    from->setLength(len);
  return 0;
}

TQ_LONG KSocksSocketDevice::tqreadBlock(char *data, TQ_ULONG maxlen)
{
  resetError();
  if (m_sockfd == -1)
    return -1;

  if (maxlen == 0 || data == 0L)
    return 0;			// can't read

  ssize_t retval;
  int err = socks_read_common(m_sockfd, data, maxlen, 0L, retval);

  if (err)
    {
      setError(IO_ReadError, static_cast<SocketError>(err));
      return -1;
    }

  return retval;
}

TQ_LONG KSocksSocketDevice::tqreadBlock(char *data, TQ_ULONG maxlen, TDESocketAddress &from)
{
  resetError();
  if (m_sockfd == -1)
    return -1;			// nothing to do here

  if (data == 0L || maxlen == 0)
    return 0;			// user doesn't want to read

  ssize_t retval;
  int err = socks_read_common(m_sockfd, data, maxlen, &from, retval);

  if (err)
    {
      setError(IO_ReadError, static_cast<SocketError>(err));
      return -1;
    }

  return retval;
}

TQ_LONG KSocksSocketDevice::peekBlock(char *data, TQ_ULONG maxlen)
{
  resetError();
  if (m_sockfd == -1)
    return -1;

  if (maxlen == 0 || data == 0L)
    return 0;			// can't read

  ssize_t retval;
  int err = socks_read_common(m_sockfd, data, maxlen, 0L, retval, true);

  if (err)
    {
      setError(IO_ReadError, static_cast<SocketError>(err));
      return -1;
    }

  return retval;
}

TQ_LONG KSocksSocketDevice::peekBlock(char *data, TQ_ULONG maxlen, TDESocketAddress& from)
{
  resetError();
  if (m_sockfd == -1)
    return -1;			// nothing to do here

  if (data == 0L || maxlen == 0)
    return 0;			// user doesn't want to read

  ssize_t retval;
  int err = socks_read_common(m_sockfd, data, maxlen, &from, retval, true);

  if (err)
    {
      setError(IO_ReadError, static_cast<SocketError>(err));
      return -1;
    }

  return retval;
}

TQ_LONG KSocksSocketDevice::tqwriteBlock(const char *data, TQ_ULONG len)
{
  return tqwriteBlock(data, len, TDESocketAddress());
}

TQ_LONG KSocksSocketDevice::tqwriteBlock(const char *data, TQ_ULONG len, const TDESocketAddress& to)
{
  resetError();
  if (m_sockfd == -1)
    return -1;			// can't write to unopen socket

  if (data == 0L || len == 0)
    return 0;			// nothing to be written

  ssize_t retval = KSocks::self()->sendto(m_sockfd, data, len, 0, to.address(), to.length());
  if (retval == -1)
    {
      if (errno == EAGAIN || errno == EWOULDBLOCK)
	setError(IO_WriteError, WouldBlock);
      else
	setError(IO_WriteError, UnknownError);
      return -1;		// nothing written
    }

  return retval;
}

TDESocketAddress KSocksSocketDevice::localAddress() const
{
  if (m_sockfd == -1)
    return TDESocketAddress();	// not open, empty value

  kde_socklen_t len;
  TDESocketAddress localAddress;
  localAddress.setLength(len = 32);	// arbitrary value
  if (KSocks::self()->getsockname(m_sockfd, localAddress.address(), &len) == -1)
    // error!
    return TDESocketAddress();

  if (len <= localAddress.length())
    {
      // it has fit already
      localAddress.setLength(len);
      return localAddress;
    }

  // no, the socket address is actually larger than we had anticipated
  // call again
  localAddress.setLength(len);
  if (KSocks::self()->getsockname(m_sockfd, localAddress.address(), &len) == -1)
    // error!
    return TDESocketAddress();

  return localAddress;
}

TDESocketAddress KSocksSocketDevice::peerAddress() const
{
  if (m_sockfd == -1)
    return TDESocketAddress();	// not open, empty value

  kde_socklen_t len;
  TDESocketAddress peerAddress;
  peerAddress.setLength(len = 32);	// arbitrary value
  if (KSocks::self()->getpeername(m_sockfd, peerAddress.address(), &len) == -1)
    // error!
    return TDESocketAddress();

  if (len <= peerAddress.length())
    {
      // it has fit already
      peerAddress.setLength(len);
      return peerAddress;
    }

  // no, the socket address is actually larger than we had anticipated
  // call again
  peerAddress.setLength(len);
  if (KSocks::self()->getpeername(m_sockfd, peerAddress.address(), &len) == -1)
    // error!
    return TDESocketAddress();

  return peerAddress;
}

TDESocketAddress KSocksSocketDevice::externalAddress() const
{
  // return empty, indicating unknown external address
  return TDESocketAddress();
}

bool KSocksSocketDevice::poll(bool *input, bool *output, bool *exception,
			      int timeout, bool *timedout)
{
  if (m_sockfd == -1)
    {
      setError(IO_UnspecifiedError, NotCreated);
      return false;
    }

  resetError();
  fd_set readfds, writefds, exceptfds;
  fd_set *preadfds = 0L, *pwritefds = 0L, *pexceptfds = 0L;

  if (input)
    {
      preadfds = &readfds;
      FD_ZERO(preadfds);
      FD_SET(m_sockfd, preadfds);
      *input = false;
    }
  if (output)
    {
      pwritefds = &writefds;
      FD_ZERO(pwritefds);
      FD_SET(m_sockfd, pwritefds);
      *output = false;
    }
  if (exception)
    {
      pexceptfds = &exceptfds;
      FD_ZERO(pexceptfds);
      FD_SET(m_sockfd, pexceptfds);
      *exception = false;
    }

  int retval;
  if (timeout < 0)
    retval = KSocks::self()->select(m_sockfd + 1, preadfds, pwritefds, pexceptfds, 0L);
  else
    {
      // convert the milliseconds to timeval
      struct timeval tv;
      tv.tv_sec = timeout / 1000;
      tv.tv_usec = timeout % 1000 * 1000;

      retval = select(m_sockfd + 1, preadfds, pwritefds, pexceptfds, &tv);
    }

  if (retval == -1)
    {
      setError(IO_UnspecifiedError, UnknownError);
      return false;
    }
  if (retval == 0)
    {
      // timeout
      if (timedout)
	*timedout = true;
      return true;
    }

  if (input && FD_ISSET(m_sockfd, preadfds))
    *input = true;
  if (output && FD_ISSET(m_sockfd, pwritefds))
    *output = true;
  if (exception && FD_ISSET(m_sockfd, pexceptfds))
    *exception = true;

  return true;
}

void KSocksSocketDevice::initSocks()
{
  static bool init = false;

  if (init)
    return;

  if (kapp == 0L)
    return;			// no TDEApplication, so don't initialise
                                // this should, however, test for TDEInstance

  init = true;

  if (KSocks::self()->hasSocks())
    delete TDESocketDevice::setDefaultImpl(new TDESocketDeviceFactory<KSocksSocketDevice>);
}

#if 0
static bool register()
{
  TDESocketDevice::addNewImpl(new TDESocketDeviceFactory<KSocksSocketDevice>, 0);
}

static bool register = registered();
#endif