-
Notifications
You must be signed in to change notification settings - Fork 1
/
threadread.cpp
500 lines (430 loc) · 20.1 KB
/
threadread.cpp
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
488
489
490
491
492
493
494
495
496
497
498
499
// ****************************************************************************
// Project: GUYMAGER
// ****************************************************************************
// Programmer: Guy Voncken
// Police Grand-Ducale
// Service de Police Judiciaire
// Section Nouvelles Technologies
// ****************************************************************************
// Module: Thread for reading data.
// ****************************************************************************
// Copyright 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017,
// 2018, 2019, 2020
// Guy Voncken
//
// This file is part of Guymager.
//
// Guymager is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Guymager 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Guymager. If not, see <http://www.gnu.org/licenses/>.
#include <errno.h>
#include <unistd.h>
#include <QtCore>
#include "common.h"
#include "config.h"
#include "device.h"
#include "threadread.h"
#include "threadwrite.h"
#include "fcntl.h"
//#define _GNU_SOURCE
const int THREADREAD_CHECK_CONNECTED_SLEEP = 1000;
const int THREADREAD_SLOWDOWN_SLEEP = 700;
class t_ThreadReadLocal
{
public:
t_pDevice pDevice;
bool *pSlowDownRequest;
};
t_ThreadRead::t_ThreadRead(void)
{
CHK_EXIT (ERROR_THREADREAD_CONSTRUCTOR_NOT_SUPPORTED)
} //lint !e1401 not initialised
t_ThreadRead::t_ThreadRead (t_pDevice pDevice, bool *pSlowDownRequest)
{
static bool Initialised = false;
if (!Initialised)
{
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_FILESRC_ALREADY_OPEN ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_NO_DATA ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_DEVICE_DISCONNECTED ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_UNEXPECTED_FAILURE ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_CONSTRUCTOR_NOT_SUPPORTED))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_BLOCKSIZE ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_DEVICE_ABORTED ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_LIBEWF_FAILED ))
CHK_EXIT (TOOL_ERROR_REGISTER_CODE (ERROR_THREADREAD_BAD_FILE_HANDLE ))
Initialised = true;
}
pOwn = new t_ThreadReadLocal;
pOwn->pDevice = pDevice;
pOwn->pSlowDownRequest = pSlowDownRequest;
CHK_QT_EXIT (connect (this, SIGNAL(finished()), this, SLOT(SlotFinished())))
}
t_ThreadRead::~t_ThreadRead (void)
{
delete pOwn;
}
inline bool ThreadReadEOF (t_pDevice pDevice)
{
// LOG_INFO ("EOF check %lld %lld", pDevice->CurrentPos, pDevice->Size)
return (pDevice->CurrentReadPos.Get() >= pDevice->Size);
}
static APIRET ThreadReadCheckDeviceExists (t_pcDevice pDevice, bool &DeviceExists)
{
FILE *pFileTest;
pFileTest = fopen64 (QSTR_TO_PSZ(pDevice->LinuxDevice), "r");
DeviceExists = (pFileTest != nullptr);
if (DeviceExists)
(void) fclose (pFileTest);
return NO_ERROR;
}
static APIRET ThreadReadDeviceDisconnected (t_pDevice pDevice, const char* pStrAction)
{
if (pDevice->FileDescSrc != t_Device::FileDescEmpty)
{
(void) close (pDevice->FileDescSrc);
pDevice->FileDescSrc = t_Device::FileDescEmpty;
}
if (pDevice->GetState() == t_Device::Launch)
{
LOG_INFO ("[%s] Device disconnected just after acquisition launch (%s, %d, %s)", QSTR_TO_PSZ(pDevice->LinuxDevice), pStrAction, errno, strerror(errno))
pDevice->SetState (t_Device::LaunchPaused); // Only switch statem, but do not set error here (will be done in t_MainWindow::SlotScanFinished)
}
else
{
if (pDevice->GetState() == t_Device::Acquire)
pDevice->SetState (t_Device::AcquirePaused);
else pDevice->SetState (t_Device::VerifyPaused );
LOG_INFO ("[%s] Device disconnected (%s, %d, %s), switching device state to %s", QSTR_TO_PSZ(pDevice->LinuxDevice), pStrAction, errno, strerror(errno), pDevice->StateStr())
}
return ERROR_THREADREAD_DEVICE_DISCONNECTED;
}
static APIRET ThreadReadAdjustSeek (t_pDevice pDevice) // According to the GNU Clib docu, a seek should be done after read errors
{
off64_t rc;
if (pDevice->FileDescSrc == t_Device::FileDescEmpty)
CHK (ERROR_THREADREAD_FILESRC_NOT_OPEN)
if (ThreadReadEOF (pDevice))
return NO_ERROR;
rc = lseek64 (pDevice->FileDescSrc, (off64_t)pDevice->CurrentReadPos.Get(), SEEK_SET);
if (rc < 0)
CHK_RET (ThreadReadDeviceDisconnected (pDevice, "seek"))
return NO_ERROR;
}
static APIRET ThreadReadBlock0 (t_pDevice pDevice, unsigned char *pBuffer, unsigned int Size)
{
bool DeviceExists;
ssize_t Read;
int OpenFlags;
errno = 0;
if (pDevice->FileDescSrc == t_Device::FileDescEmpty)
{
OpenFlags = O_RDONLY | O_NOATIME;
if ((CONFIG (DirectIO) || pDevice->FallbackMode) && // Try DirectIO if configured to do so; Also use DirectIO in FallBack mode, in order to avoid the "contagious
CONFIG (FifoMemoryManager)) // error". For DirectIO, FifoMemoryManager must be on, as the buffers must be located on page size (4K) boundaries
{ // (this only is guaranteed when working with Guymager's internal memory manager (see t_FifoMemory::t_FifoMemory))
LOG_INFO ("[%s] Trying direct mode", QSTR_TO_PSZ(pDevice->LinuxDevice))
OpenFlags |= O_DIRECT;
}
pDevice->FileDescSrc = open64 (QSTR_TO_PSZ(pDevice->LinuxDevice), OpenFlags);
if ((pDevice->FileDescSrc < 0) && (OpenFlags & O_DIRECT) && (errno == EINVAL)) // If an invalid parameter is reported, O_DIRECT might have
{ // caused problems. This was observed when opening files
OpenFlags &= ~O_DIRECT; // (added as special device) on the cases server (dd reported
pDevice->FileDescSrc = open64 (QSTR_TO_PSZ(pDevice->LinuxDevice), OpenFlags); // the same error with iflag=direct). Try again without it.
}
if ((pDevice->FileDescSrc < 0) && (OpenFlags & O_NOATIME)) // Another cause for trouble might be NOATIME. This was observed when
{ // giving standard users read access to physical disks).
OpenFlags &= ~O_NOATIME;
pDevice->FileDescSrc = open64 (QSTR_TO_PSZ(pDevice->LinuxDevice), OpenFlags);
}
LOG_INFO ("[%s] Flag DIRECT on source device switched %s", QSTR_TO_PSZ(pDevice->LinuxDevice), (OpenFlags & O_DIRECT ) ? "on":"off")
LOG_INFO ("[%s] Flag NOATIME on source device switched %s", QSTR_TO_PSZ(pDevice->LinuxDevice), (OpenFlags & O_NOATIME) ? "on":"off")
if (pDevice->FileDescSrc < 0)
CHK_RET (ThreadReadDeviceDisconnected (pDevice, "open"))
CHK_RET (ThreadReadAdjustSeek (pDevice))
}
Read = read (pDevice->FileDescSrc, pBuffer, Size);
// Bad sector simulation
// if ((pDevice->CurrentReadPos.Get() > 900000000) && (pDevice->CurrentReadPos.Get() < (900000000+65536*2)))
// {
// #warning "bad sector simulation is still on"
// Read=0;
// }
if (Read == (ssize_t)Size)
{
pDevice->CurrentReadPos.Inc(Size);
return NO_ERROR;
}
else
{
CHK (ThreadReadCheckDeviceExists (pDevice, DeviceExists))
if (DeviceExists)
{
CHK_RET (ThreadReadAdjustSeek (pDevice))
return ERROR_THREADREAD_NO_DATA;
}
else
{
CHK_RET (ThreadReadDeviceDisconnected (pDevice, "read"))
}
}
return NO_ERROR;
}
APIRET t_ThreadRead::ThreadReadBlock (t_pFifoBlock &pFifoBlock)
{
t_pDevice pDevice;
unsigned char *pBuffer;
quint64 BytesToRead;
quint64 BytesRead = 0;
quint64 RemainingSize;
quint64 Sector;
quint64 BadSectorCount;
quint64 PrevReadPos;
unsigned int ReadTry;
APIRET RcRead;
APIRET RcSeek;
pDevice = pOwn->pDevice;
PrevReadPos = pDevice->CurrentReadPos.Get();
RemainingSize = pDevice->Size - PrevReadPos;
if ((quint64)pDevice->FifoBlockSize > RemainingSize)
BytesToRead = RemainingSize;
else BytesToRead = pDevice->FifoBlockSize;
if (BytesToRead > INT_MAX)
CHK (ERROR_THREADREAD_BLOCKSIZE)
CHK (t_Fifo::Create (pDevice->pFifoMemory, pFifoBlock, pDevice->FifoAllocBlockSize))
pFifoBlock->DataSize = (unsigned int) BytesToRead;
pBuffer = pFifoBlock->Buffer;
if (pDevice->FallbackMode)
ReadTry = pDevice->SectorSize;
else ReadTry = BytesToRead;
do
{
RcRead = ThreadReadBlock0 (pDevice, pBuffer, ReadTry);
switch (RcRead)
{
case NO_ERROR:
BytesRead += ReadTry;
pBuffer += ReadTry;
break;
case ERROR_THREADREAD_NO_DATA:
if (!pDevice->FallbackMode)
{
pDevice->FallbackMode = true;
if (!CONFIG(DirectIO)) // When running without DirectIO we close the source device,
{ // thus forcing ThreadReadBlock0 to re-open it with DirectIO
(void) close (pDevice->FileDescSrc); // switched on (in order to avoid the "contagious error")
pDevice->FileDescSrc = t_Device::FileDescEmpty;
}
ReadTry = pDevice->SectorSize;
LOG_INFO ("[%s] Device read error, switching to slow fallback mode. Reading sectors individually from now on.", QSTR_TO_PSZ(pDevice->LinuxDevice))
}
else
{
Sector = pDevice->CurrentReadPos.Get() / pDevice->SectorSize;
pDevice->CurrentReadPos.Inc(ReadTry);
RcSeek = ThreadReadAdjustSeek (pDevice); // If the seek still succeeds, then there's probably just a bad sector on
switch (RcSeek) // the source device, let's replace it by a zero sector.
{
case NO_ERROR:
if ((pDevice->Acquisition1.Format == t_File::AAFF) && (CONFIG (AffMarkBadSectors)))
CHK (AaffCopyBadSectorMarker (pBuffer, ReadTry))
else memset (pBuffer, 0, ReadTry);
BytesRead += ReadTry;
pBuffer += ReadTry;
pDevice->AddBadSector (Sector);
BadSectorCount = pDevice->GetBadSectorCount (false);
if ( CONFIG(BadSectorLogThreshold) == 0 || // Threshold feature disabled if cfg param is zero
(BadSectorCount <= (quint64) CONFIG(BadSectorLogThreshold)) ||
((BadSectorCount % (quint64) CONFIG(BadSectorLogModulo )) == 0))
LOG_INFO ("[%s] Read error on sector %lld, bad data replaced by zero block (%lld bad sectors up until now)", QSTR_TO_PSZ(pDevice->LinuxDevice), Sector, BadSectorCount)
if (BadSectorCount == (quint64)CONFIG(BadSectorLogThreshold))
LOG_INFO ("[%s] Bad sector threshold has been reached, only logging every 1000th bad sector from now on.", QSTR_TO_PSZ(pDevice->LinuxDevice))
if (CONFIG(JobMaxBadSectors) &&
(CONFIG(LimitJobs) != CONFIG_LIMITJOBS_OFF) &&
(pDevice->GetBadSectorCount(false) > (quint64)CONFIG(JobMaxBadSectors)))
pDevice->Error.Set (t_Device::t_Error::TooManyBadSectors);
break;
case ERROR_THREADREAD_DEVICE_DISCONNECTED:
break;
default:
CHK (RcSeek)
}
}
break;
case ERROR_THREADREAD_DEVICE_DISCONNECTED:
break;
default:
CHK (RcRead)
}
} while ((BytesRead < BytesToRead) && (pDevice->GetState() != t_Device::LaunchPaused )
&& (pDevice->GetState() != t_Device::AcquirePaused)
&& (pDevice->GetState() != t_Device::VerifyPaused )
&& !pDevice->Error.Abort());
if ((pDevice->GetState() == t_Device::LaunchPaused ) ||
(pDevice->GetState() == t_Device::AcquirePaused) ||
(pDevice->GetState() == t_Device::VerifyPaused ))
{
CHK (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlock))
pDevice->CurrentReadPos.Set(PrevReadPos);
return ERROR_THREADREAD_DEVICE_DISCONNECTED;
}
else if (pDevice->Error.Abort())
{
CHK (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlock))
return ERROR_THREADREAD_DEVICE_ABORTED;
}
else if ((pDevice->FallbackMode) && (RcRead == NO_ERROR))
{
pDevice->FallbackMode = false; // Switch to fast reading mode if last read was good
LOG_INFO ("[%s] Device read ok again, switching to fast block read.", QSTR_TO_PSZ(pDevice->LinuxDevice))
if (!CONFIG(DirectIO)) // Be sure to switch DirectIO off again if configured so.
{ // We do so by closing the source device. ThreadReadBlock0
(void) close (pDevice->FileDescSrc); // is then forced to re-open the device where it will switch
pDevice->FileDescSrc = t_Device::FileDescEmpty; // off DirectIO.
}
}
pFifoBlock->LastBlock = ThreadReadEOF (pDevice);
return NO_ERROR;
}
void t_ThreadRead::run (void)
{
t_pDevice pDevice;
t_pFifoBlock pFifoBlock;
APIRET rc;
int rcf;
bool CalcHashMD5;
bool CalcHashSHA1;
bool CalcHashSHA256;
quint64 *pBlocks;
quint64 BlocksRead = 0;
quint64 BlocksVerified = 0;
quint64 BytesRead = 0;
quint64 BytesVerified = 0;
t_HashContextMD5 HashContextMD5;
t_HashContextSHA1 HashContextSHA1;
t_HashContextSHA256 HashContextSHA256;
LOG_INFO ("[%s] Read thread started", QSTR_TO_PSZ (pOwn->pDevice->LinuxDevice))
CHK_EXIT (SetDebugMessage ("Start run function"))
pDevice = pOwn->pDevice;
CalcHashMD5 = pDevice->Acquisition1.CalcMD5 && !CONFIG (UseSeparateHashThread);
CalcHashSHA1 = pDevice->Acquisition1.CalcSHA1 && !CONFIG (UseSeparateHashThread);
CalcHashSHA256 = pDevice->Acquisition1.CalcSHA256 && !CONFIG (UseSeparateHashThread);
pBlocks = &BlocksRead;
// pDevice->AddBadSector (3); // Simulate bad sectors
// pDevice->AddBadSector (4);
// pDevice->AddBadSector (5);
// pDevice->AddBadSector (122);
for (;;)
{
pDevice->CurrentReadPos.Zero();
pDevice->FileDescSrc = t_Device::FileDescEmpty;
pDevice->FallbackMode = false;
*pBlocks = 0;
if (CalcHashMD5) CHK_EXIT (HashMD5Init (&HashContextMD5 ))
if (CalcHashSHA1) CHK_EXIT (HashSHA1Init (&HashContextSHA1 ))
if (CalcHashSHA256) CHK_EXIT (HashSHA256Init (&HashContextSHA256))
do
{
if (*(pOwn->pSlowDownRequest))
msleep (THREADREAD_SLOWDOWN_SLEEP);
CHK_EXIT (SetDebugMessage ("Calling ThreadReadBlock"))
rc = ThreadReadBlock (pFifoBlock);
CHK_EXIT (SetDebugMessage ("ThreadReadBlock returned"))
switch (rc)
{
case NO_ERROR:
pFifoBlock->Nr = (*pBlocks);
if (CalcHashMD5) CHK_EXIT (HashMD5Append (&HashContextMD5 , pFifoBlock->Buffer, pFifoBlock->DataSize))
if (CalcHashSHA1) CHK_EXIT (HashSHA1Append (&HashContextSHA1 , pFifoBlock->Buffer, pFifoBlock->DataSize))
if (CalcHashSHA256) CHK_EXIT (HashSHA256Append (&HashContextSHA256, pFifoBlock->Buffer, pFifoBlock->DataSize))
if ((pDevice->GetState() == t_Device::Verify) && (CalcHashMD5 || CalcHashSHA1 || CalcHashSHA256))
{
pDevice->CurrentVerifyPosSrc.Inc (pFifoBlock->DataSize);
CHK_EXIT (t_Fifo::Destroy (pDevice->pFifoMemory, pFifoBlock))
}
else
{
CHK_EXIT (pDevice->pFifoRead->Insert (pFifoBlock))
}
(*pBlocks)++;
break;
case ERROR_THREADREAD_DEVICE_DISCONNECTED:
while (!pDevice->Error.Abort() && ((pDevice->GetState() == t_Device::LaunchPaused ) ||
(pDevice->GetState() == t_Device::AcquirePaused) ||
(pDevice->GetState() == t_Device::VerifyPaused )) )
msleep (THREADREAD_CHECK_CONNECTED_SLEEP);
break;
case ERROR_THREADREAD_DEVICE_ABORTED:
break;
default:
LOG_ERROR ("[%s] Unexpected return code from ThreadReadBlock", QSTR_TO_PSZ(pDevice->LinuxDevice))
CHK_EXIT (rc)
}
} while (!ThreadReadEOF(pDevice) && !pDevice->Error.Abort());
if (pDevice->Error.Abort())
break;
if ((pDevice->GetState() == t_Device::Acquire) ||
(pDevice->GetState() == t_Device::Launch))
BytesRead = pDevice->CurrentReadPos.Get();
else BytesVerified = pDevice->CurrentReadPos.Get();
if (pDevice->GetState() == t_Device::Verify)
{
if (CalcHashMD5) CHK_EXIT (HashMD5Digest (&HashContextMD5 , &pDevice->MD5DigestVerifySrc ))
if (CalcHashSHA1) CHK_EXIT (HashSHA1Digest (&HashContextSHA1 , &pDevice->SHA1DigestVerifySrc ))
if (CalcHashSHA256) CHK_EXIT (HashSHA256Digest (&HashContextSHA256, &pDevice->SHA256DigestVerifySrc))
LOG_INFO ("[%s] Source verification completed", QSTR_TO_PSZ (pDevice->LinuxDevice))
break;
}
if (CalcHashMD5) CHK_EXIT (HashMD5Digest (&HashContextMD5 , &pDevice->MD5Digest ))
if (CalcHashSHA1) CHK_EXIT (HashSHA1Digest (&HashContextSHA1 , &pDevice->SHA1Digest ))
if (CalcHashSHA256) CHK_EXIT (HashSHA256Digest (&HashContextSHA256, &pDevice->SHA256Digest))
if ((pDevice->Acquisition1.VerifySrc) ||
(pDevice->Acquisition1.VerifyDst) ||
(pDevice->Acquisition2.VerifyDst && pDevice->Duplicate))
{
pDevice->SetState (t_Device::Verify);
pDevice->StartTimestampVerify = QDateTime::currentDateTime();
}
if (pDevice->Acquisition1.VerifySrc)
{
(void) close (pDevice->FileDescSrc);
pDevice->FileDescSrc = t_Device::FileDescEmpty;
LOG_INFO ("[%s] All data has been read, now re-reading for source verification", QSTR_TO_PSZ (pDevice->LinuxDevice))
pBlocks = &BlocksVerified;
// if (CONFIG (UseSeparateHashThread))
CHK_EXIT (pDevice->pFifoRead->InsertDummy ())
}
else
{
LOG_INFO ("[%s] All data has been read", QSTR_TO_PSZ (pDevice->LinuxDevice))
break;
}
}
if (pDevice->FileDescSrc != t_Device::FileDescEmpty)
{
rcf = close (pDevice->FileDescSrc);
pDevice->FileDescSrc = t_Device::FileDescEmpty;
if (rcf)
{
LOG_INFO ("[%s] Unexpected error on close, errno = %d", QSTR_TO_PSZ(pDevice->LinuxDevice), errno)
pDevice->Error.Set(t_Device::t_Error::ReadError);
}
}
LOG_INFO ("[%s] Read thread exits now (%lld blocks read, %llu bytes)", QSTR_TO_PSZ (pDevice->LinuxDevice), BlocksRead, BytesRead)
if (pDevice->Acquisition1.VerifySrc)
LOG_INFO ("[%s] Source verification: %lld blocks read, %llu bytes)", QSTR_TO_PSZ(pDevice->LinuxDevice), BlocksVerified, BytesVerified)
CHK_EXIT (SetDebugMessage ("Exit run function"))
}
void t_ThreadRead::SlotFinished (void)
{
emit SignalEnded (pOwn->pDevice);
}