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
|
//------------------------------------------------------------
// Copyright (c) Microsoft Corporation. All rights reserved.
//------------------------------------------------------------
namespace System.ServiceModel.Channels
{
using System;
using System.Diagnostics;
using System.IO;
using System.Runtime;
using System.Runtime.Diagnostics;
using System.ServiceModel;
using System.ServiceModel.Diagnostics;
using System.ServiceModel.Diagnostics.Application;
delegate IConnectionOrientedTransportFactorySettings TransportSettingsCallback(Uri via);
delegate void ConnectionClosedCallback(InitialServerConnectionReader connectionReader);
// Host for a connection that deals with structured close/abort and notifying the owner appropriately
// used for cases where no one else (channel, etc) actually owns the reader
abstract class InitialServerConnectionReader : IDisposable
{
int maxViaSize;
int maxContentTypeSize;
IConnection connection;
Action connectionDequeuedCallback;
ConnectionClosedCallback closedCallback;
bool isClosed;
protected InitialServerConnectionReader(IConnection connection, ConnectionClosedCallback closedCallback)
: this(connection, closedCallback,
ConnectionOrientedTransportDefaults.MaxViaSize, ConnectionOrientedTransportDefaults.MaxContentTypeSize)
{
}
protected InitialServerConnectionReader(IConnection connection, ConnectionClosedCallback closedCallback, int maxViaSize, int maxContentTypeSize)
{
if (connection == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("connection");
}
if (closedCallback == null)
{
throw DiagnosticUtility.ExceptionUtility.ThrowHelperArgumentNull("closedCallback");
}
this.connection = connection;
this.closedCallback = closedCallback;
this.maxContentTypeSize = maxContentTypeSize;
this.maxViaSize = maxViaSize;
}
public IConnection Connection
{
get { return connection; }
}
public Action ConnectionDequeuedCallback
{
get
{
return this.connectionDequeuedCallback;
}
set
{
this.connectionDequeuedCallback = value;
}
}
public Action GetConnectionDequeuedCallback()
{
Action dequeuedCallback = this.connectionDequeuedCallback;
this.connectionDequeuedCallback = null;
return dequeuedCallback;
}
protected bool IsClosed
{
get { return isClosed; }
}
protected int MaxContentTypeSize
{
get
{
return maxContentTypeSize;
}
}
protected int MaxViaSize
{
get
{
return maxViaSize;
}
}
object ThisLock
{
get { return this; }
}
// used by the listener to release the connection object so it can be closed at a later time
public void ReleaseConnection()
{
isClosed = true;
connection = null;
}
// for cached connections -- try to shut down gracefully if possible
public void CloseFromPool(TimeSpan timeout)
{
try
{
Close(timeout);
}
catch (CommunicationException communicationException)
{
DiagnosticUtility.TraceHandledException(communicationException, TraceEventType.Information);
}
catch (TimeoutException timeoutException)
{
if (TD.CloseTimeoutIsEnabled())
{
TD.CloseTimeout(timeoutException.Message);
}
DiagnosticUtility.TraceHandledException(timeoutException, TraceEventType.Information);
}
}
public void Dispose()
{
lock (ThisLock)
{
if (isClosed)
{
return;
}
this.isClosed = true;
}
IConnection connection = this.connection;
if (connection != null)
{
connection.Abort();
}
if (this.connectionDequeuedCallback != null)
{
this.connectionDequeuedCallback();
}
}
protected void Abort()
{
Abort(null);
}
internal void Abort(Exception e)
{
lock (ThisLock)
{
if (isClosed)
return;
isClosed = true;
}
try
{
if (e != null)
{
if (DiagnosticUtility.ShouldTraceError)
{
TraceUtility.TraceEvent(TraceEventType.Error, TraceCode.ChannelConnectionDropped,
SR.GetString(SR.TraceCodeChannelConnectionDropped), this, e);
}
}
connection.Abort();
}
finally
{
if (closedCallback != null)
{
closedCallback(this);
}
if (this.connectionDequeuedCallback != null)
{
this.connectionDequeuedCallback();
}
}
}
protected void Close(TimeSpan timeout)
{
lock (ThisLock)
{
if (isClosed)
return;
isClosed = true;
}
bool success = false;
try
{
connection.Close(timeout, true);
success = true;
}
finally
{
if (!success)
{
connection.Abort();
}
if (closedCallback != null)
{
closedCallback(this);
}
if (this.connectionDequeuedCallback != null)
{
this.connectionDequeuedCallback();
}
}
}
internal static void SendFault(IConnection connection, string faultString, byte[] drainBuffer, TimeSpan sendTimeout, int maxRead)
{
if (TD.ConnectionReaderSendFaultIsEnabled())
{
TD.ConnectionReaderSendFault(faultString);
}
EncodedFault encodedFault = new EncodedFault(faultString);
TimeoutHelper timeoutHelper = new TimeoutHelper(sendTimeout);
try
{
connection.Write(encodedFault.EncodedBytes, 0, encodedFault.EncodedBytes.Length, true, timeoutHelper.RemainingTime());
connection.Shutdown(timeoutHelper.RemainingTime());
}
catch (CommunicationException e)
{
DiagnosticUtility.TraceHandledException(e, TraceEventType.Information);
connection.Abort();
return;
}
catch (TimeoutException e)
{
if (TD.SendTimeoutIsEnabled())
{
TD.SendTimeout(e.Message);
}
DiagnosticUtility.TraceHandledException(e, TraceEventType.Information);
connection.Abort();
return;
}
// make sure we read until EOF or a quota is hit
int read = 0;
int readTotal = 0;
for (;;)
{
try
{
read = connection.Read(drainBuffer, 0, drainBuffer.Length, timeoutHelper.RemainingTime());
}
catch (CommunicationException e)
{
DiagnosticUtility.TraceHandledException(e, TraceEventType.Information);
connection.Abort();
return;
}
catch (TimeoutException e)
{
if (TD.SendTimeoutIsEnabled())
{
TD.SendTimeout(e.Message);
}
DiagnosticUtility.TraceHandledException(e, TraceEventType.Information);
connection.Abort();
return;
}
if (read == 0)
break;
readTotal += read;
if (readTotal > maxRead || timeoutHelper.RemainingTime() <= TimeSpan.Zero)
{
connection.Abort();
return;
}
}
ConnectionUtilities.CloseNoThrow(connection, timeoutHelper.RemainingTime());
}
public static IAsyncResult BeginUpgradeConnection(IConnection connection, StreamUpgradeAcceptor upgradeAcceptor,
IDefaultCommunicationTimeouts defaultTimeouts, AsyncCallback callback, object state)
{
return new UpgradeConnectionAsyncResult(connection, upgradeAcceptor, defaultTimeouts, callback, state);
}
public static IConnection EndUpgradeConnection(IAsyncResult result)
{
// get our upgraded connection
return UpgradeConnectionAsyncResult.End(result);
}
public static IConnection UpgradeConnection(IConnection connection, StreamUpgradeAcceptor upgradeAcceptor, IDefaultCommunicationTimeouts defaultTimeouts)
{
ConnectionStream connectionStream = new ConnectionStream(connection, defaultTimeouts);
Stream stream = upgradeAcceptor.AcceptUpgrade(connectionStream);
if (upgradeAcceptor is StreamSecurityUpgradeAcceptor)
{
if (DiagnosticUtility.ShouldTraceInformation)
{
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.StreamSecurityUpgradeAccepted, SR.GetString(SR.TraceCodeStreamSecurityUpgradeAccepted),
new StringTraceRecord("Type", upgradeAcceptor.GetType().ToString()), connection, null);
}
}
return new StreamConnection(stream, connectionStream);
}
class UpgradeConnectionAsyncResult : AsyncResult
{
ConnectionStream connectionStream;
static AsyncCallback onAcceptUpgrade = Fx.ThunkCallback(new AsyncCallback(OnAcceptUpgrade));
IConnection connection;
StreamUpgradeAcceptor upgradeAcceptor;
public UpgradeConnectionAsyncResult(IConnection connection,
StreamUpgradeAcceptor upgradeAcceptor, IDefaultCommunicationTimeouts defaultTimeouts,
AsyncCallback callback, object state)
: base(callback, state)
{
this.upgradeAcceptor = upgradeAcceptor;
this.connectionStream = new ConnectionStream(connection, defaultTimeouts);
bool completeSelf = false;
IAsyncResult result = upgradeAcceptor.BeginAcceptUpgrade(connectionStream, onAcceptUpgrade, this);
if (result.CompletedSynchronously)
{
CompleteAcceptUpgrade(result);
completeSelf = true;
}
if (completeSelf)
{
base.Complete(true);
}
}
public static IConnection End(IAsyncResult result)
{
UpgradeConnectionAsyncResult thisPtr = AsyncResult.End<UpgradeConnectionAsyncResult>(result);
return thisPtr.connection;
}
void CompleteAcceptUpgrade(IAsyncResult result)
{
Stream stream;
bool endSucceeded = false;
try
{
stream = this.upgradeAcceptor.EndAcceptUpgrade(result);
endSucceeded = true;
}
finally
{
if (upgradeAcceptor is StreamSecurityUpgradeAcceptor)
{
if (DiagnosticUtility.ShouldTraceInformation && endSucceeded)
{
TraceUtility.TraceEvent(TraceEventType.Information,
TraceCode.StreamSecurityUpgradeAccepted, SR.GetString(SR.TraceCodeStreamSecurityUpgradeAccepted),
new StringTraceRecord("Type", upgradeAcceptor.GetType().ToString()), this, null);
}
}
}
this.connection = new StreamConnection(stream, this.connectionStream);
}
static void OnAcceptUpgrade(IAsyncResult result)
{
if (result.CompletedSynchronously)
return;
UpgradeConnectionAsyncResult thisPtr = (UpgradeConnectionAsyncResult)result.AsyncState;
Exception completionException = null;
try
{
thisPtr.CompleteAcceptUpgrade(result);
}
#pragma warning suppress 56500 // [....], transferring exception to another thread
catch (Exception e)
{
if (Fx.IsFatal(e))
{
throw;
}
completionException = e;
}
thisPtr.Complete(false, completionException);
}
}
}
}
|
