| | | 1 | | // Copyright (c) ZeroC, Inc. |
| | | 2 | | |
| | | 3 | | using Ice.Instrumentation; |
| | | 4 | | using Ice.Internal; |
| | | 5 | | using System.Diagnostics; |
| | | 6 | | using System.Text; |
| | | 7 | | |
| | | 8 | | namespace Ice; |
| | | 9 | | |
| | | 10 | | #pragma warning disable CA1001 // _inactivityTimer is disposed by cancelInactivityTimer. |
| | | 11 | | public sealed class ConnectionI : Internal.EventHandler, CancellationHandler, Connection |
| | | 12 | | #pragma warning restore CA1001 |
| | | 13 | | { |
| | | 14 | | internal interface StartCallback |
| | | 15 | | { |
| | | 16 | | void connectionStartCompleted(ConnectionI connection); |
| | | 17 | | |
| | | 18 | | void connectionStartFailed(ConnectionI connection, LocalException ex); |
| | | 19 | | } |
| | | 20 | | |
| | | 21 | | internal void start(StartCallback callback) |
| | | 22 | | { |
| | | 23 | | try |
| | | 24 | | { |
| | | 25 | | lock (_mutex) |
| | | 26 | | { |
| | | 27 | | // |
| | | 28 | | // The connection might already be closed if the communicator was destroyed. |
| | | 29 | | // |
| | | 30 | | if (_state >= StateClosed) |
| | | 31 | | { |
| | | 32 | | Debug.Assert(_exception is not null); |
| | | 33 | | throw _exception; |
| | | 34 | | } |
| | | 35 | | |
| | | 36 | | if (!initialize(SocketOperation.None) || !validate(SocketOperation.None)) |
| | | 37 | | { |
| | | 38 | | if (_connectTimeout > TimeSpan.Zero) |
| | | 39 | | { |
| | | 40 | | #pragma warning disable CA2000 // connectTimer is disposed by connectTimedOut. |
| | | 41 | | var connectTimer = new System.Threading.Timer( |
| | | 42 | | timerObj => connectTimedOut((System.Threading.Timer)timerObj)); |
| | | 43 | | // schedule timer to run once; connectTimedOut disposes the timer too. |
| | | 44 | | connectTimer.Change(_connectTimeout, Timeout.InfiniteTimeSpan); |
| | | 45 | | #pragma warning restore CA2000 |
| | | 46 | | } |
| | | 47 | | |
| | | 48 | | _startCallback = callback; |
| | | 49 | | return; |
| | | 50 | | } |
| | | 51 | | |
| | | 52 | | // The connection starts in the holding state. It will be activated by the connection factory. |
| | | 53 | | setState(StateHolding); |
| | | 54 | | } |
| | | 55 | | } |
| | | 56 | | catch (LocalException ex) |
| | | 57 | | { |
| | | 58 | | exception(ex); |
| | | 59 | | callback.connectionStartFailed(this, _exception); |
| | | 60 | | return; |
| | | 61 | | } |
| | | 62 | | |
| | | 63 | | callback.connectionStartCompleted(this); |
| | | 64 | | } |
| | | 65 | | |
| | | 66 | | internal void startAndWait() |
| | | 67 | | { |
| | | 68 | | try |
| | | 69 | | { |
| | | 70 | | lock (_mutex) |
| | | 71 | | { |
| | | 72 | | // |
| | | 73 | | // The connection might already be closed if the communicator was destroyed. |
| | | 74 | | // |
| | | 75 | | if (_state >= StateClosed) |
| | | 76 | | { |
| | | 77 | | Debug.Assert(_exception is not null); |
| | | 78 | | throw _exception; |
| | | 79 | | } |
| | | 80 | | |
| | | 81 | | if (!initialize(SocketOperation.None) || !validate(SocketOperation.None)) |
| | | 82 | | { |
| | | 83 | | // |
| | | 84 | | // Wait for the connection to be validated. |
| | | 85 | | // |
| | | 86 | | while (_state <= StateNotValidated) |
| | | 87 | | { |
| | | 88 | | Monitor.Wait(_mutex); |
| | | 89 | | } |
| | | 90 | | |
| | | 91 | | if (_state >= StateClosing) |
| | | 92 | | { |
| | | 93 | | Debug.Assert(_exception is not null); |
| | | 94 | | throw _exception; |
| | | 95 | | } |
| | | 96 | | } |
| | | 97 | | |
| | | 98 | | // |
| | | 99 | | // We start out in holding state. |
| | | 100 | | // |
| | | 101 | | setState(StateHolding); |
| | | 102 | | } |
| | | 103 | | } |
| | | 104 | | catch (LocalException ex) |
| | | 105 | | { |
| | | 106 | | exception(ex); |
| | | 107 | | waitUntilFinished(); |
| | | 108 | | return; |
| | | 109 | | } |
| | | 110 | | } |
| | | 111 | | |
| | | 112 | | internal void activate() |
| | | 113 | | { |
| | | 114 | | lock (_mutex) |
| | | 115 | | { |
| | | 116 | | if (_state <= StateNotValidated) |
| | | 117 | | { |
| | | 118 | | return; |
| | | 119 | | } |
| | | 120 | | |
| | | 121 | | setState(StateActive); |
| | | 122 | | } |
| | | 123 | | } |
| | | 124 | | |
| | | 125 | | internal void hold() |
| | | 126 | | { |
| | | 127 | | lock (_mutex) |
| | | 128 | | { |
| | | 129 | | if (_state <= StateNotValidated) |
| | | 130 | | { |
| | | 131 | | return; |
| | | 132 | | } |
| | | 133 | | |
| | | 134 | | setState(StateHolding); |
| | | 135 | | } |
| | | 136 | | } |
| | | 137 | | |
| | | 138 | | // DestructionReason. |
| | | 139 | | public const int ObjectAdapterDeactivated = 0; |
| | | 140 | | public const int CommunicatorDestroyed = 1; |
| | | 141 | | |
| | | 142 | | internal void destroy(int reason) |
| | | 143 | | { |
| | | 144 | | lock (_mutex) |
| | | 145 | | { |
| | | 146 | | switch (reason) |
| | | 147 | | { |
| | | 148 | | case ObjectAdapterDeactivated: |
| | | 149 | | { |
| | | 150 | | setState(StateClosing, new ObjectAdapterDeactivatedException(_adapter?.getName() ?? "")); |
| | | 151 | | break; |
| | | 152 | | } |
| | | 153 | | |
| | | 154 | | case CommunicatorDestroyed: |
| | | 155 | | { |
| | | 156 | | setState(StateClosing, new CommunicatorDestroyedException()); |
| | | 157 | | break; |
| | | 158 | | } |
| | | 159 | | } |
| | | 160 | | } |
| | | 161 | | } |
| | | 162 | | |
| | | 163 | | public void abort() |
| | | 164 | | { |
| | | 165 | | lock (_mutex) |
| | | 166 | | { |
| | | 167 | | setState( |
| | | 168 | | StateClosed, |
| | | 169 | | new ConnectionAbortedException( |
| | | 170 | | "The connection was aborted by the application.", |
| | | 171 | | closedByApplication: true)); |
| | | 172 | | } |
| | | 173 | | } |
| | | 174 | | |
| | | 175 | | public Task closeAsync() |
| | | 176 | | { |
| | | 177 | | lock (_mutex) |
| | | 178 | | { |
| | | 179 | | if (_state < StateClosing) |
| | | 180 | | { |
| | | 181 | | if (_asyncRequests.Count == 0) |
| | | 182 | | { |
| | | 183 | | doApplicationClose(); |
| | | 184 | | } |
| | | 185 | | else |
| | | 186 | | { |
| | | 187 | | _closeRequested = true; |
| | | 188 | | scheduleCloseTimer(); // we don't wait forever for outstanding invocations to complete |
| | | 189 | | } |
| | | 190 | | } |
| | | 191 | | // else nothing to do, already closing or closed. |
| | | 192 | | } |
| | | 193 | | |
| | | 194 | | return _closed.Task; |
| | | 195 | | } |
| | | 196 | | |
| | | 197 | | internal bool isActiveOrHolding() |
| | | 198 | | { |
| | | 199 | | lock (_mutex) |
| | | 200 | | { |
| | | 201 | | return _state > StateNotValidated && _state < StateClosing; |
| | | 202 | | } |
| | | 203 | | } |
| | | 204 | | |
| | | 205 | | public void throwException() |
| | | 206 | | { |
| | | 207 | | lock (_mutex) |
| | | 208 | | { |
| | | 209 | | if (_exception is not null) |
| | | 210 | | { |
| | | 211 | | Debug.Assert(_state >= StateClosing); |
| | | 212 | | throw _exception; |
| | | 213 | | } |
| | | 214 | | } |
| | | 215 | | } |
| | | 216 | | |
| | | 217 | | internal void waitUntilHolding() |
| | | 218 | | { |
| | | 219 | | lock (_mutex) |
| | | 220 | | { |
| | | 221 | | while (_state < StateHolding || _upcallCount > 0) |
| | | 222 | | { |
| | | 223 | | Monitor.Wait(_mutex); |
| | | 224 | | } |
| | | 225 | | } |
| | | 226 | | } |
| | | 227 | | |
| | | 228 | | internal void waitUntilFinished() |
| | | 229 | | { |
| | | 230 | | lock (_mutex) |
| | | 231 | | { |
| | | 232 | | // |
| | | 233 | | // We wait indefinitely until the connection is finished and all |
| | | 234 | | // outstanding requests are completed. Otherwise we couldn't |
| | | 235 | | // guarantee that there are no outstanding calls when deactivate() |
| | | 236 | | // is called on the servant locators. |
| | | 237 | | // |
| | | 238 | | while (_state < StateFinished || _upcallCount > 0) |
| | | 239 | | { |
| | | 240 | | Monitor.Wait(_mutex); |
| | | 241 | | } |
| | | 242 | | |
| | | 243 | | Debug.Assert(_state == StateFinished); |
| | | 244 | | |
| | | 245 | | // |
| | | 246 | | // Clear the OA. See bug 1673 for the details of why this is necessary. |
| | | 247 | | // |
| | | 248 | | _adapter = null; |
| | | 249 | | } |
| | | 250 | | } |
| | | 251 | | |
| | | 252 | | internal void updateObserver() |
| | | 253 | | { |
| | | 254 | | lock (_mutex) |
| | | 255 | | { |
| | | 256 | | if (_state < StateNotValidated || _state > StateClosed) |
| | | 257 | | { |
| | | 258 | | return; |
| | | 259 | | } |
| | | 260 | | |
| | | 261 | | Debug.Assert(_instance.initializationData().observer is not null); |
| | | 262 | | _observer = _instance.initializationData().observer.getConnectionObserver( |
| | | 263 | | initConnectionInfo(), |
| | | 264 | | _endpoint, |
| | | 265 | | toConnectionState(_state), |
| | | 266 | | _observer); |
| | | 267 | | if (_observer is not null) |
| | | 268 | | { |
| | | 269 | | _observer.attach(); |
| | | 270 | | } |
| | | 271 | | else |
| | | 272 | | { |
| | | 273 | | _writeStreamPos = -1; |
| | | 274 | | _readStreamPos = -1; |
| | | 275 | | } |
| | | 276 | | } |
| | | 277 | | } |
| | | 278 | | |
| | | 279 | | internal int sendAsyncRequest( |
| | | 280 | | OutgoingAsyncBase og, |
| | | 281 | | bool compress, |
| | | 282 | | bool response, |
| | | 283 | | int batchRequestCount) |
| | | 284 | | { |
| | | 285 | | OutputStream os = og.getOs(); |
| | | 286 | | |
| | | 287 | | lock (_mutex) |
| | | 288 | | { |
| | | 289 | | // |
| | | 290 | | // If the exception is closed before we even have a chance |
| | | 291 | | // to send our request, we always try to send the request |
| | | 292 | | // again. |
| | | 293 | | // |
| | | 294 | | if (_exception is not null) |
| | | 295 | | { |
| | | 296 | | throw new RetryException(_exception); |
| | | 297 | | } |
| | | 298 | | |
| | | 299 | | Debug.Assert(_state > StateNotValidated); |
| | | 300 | | Debug.Assert(_state < StateClosing); |
| | | 301 | | |
| | | 302 | | // |
| | | 303 | | // Ensure the message isn't bigger than what we can send with the |
| | | 304 | | // transport. |
| | | 305 | | // |
| | | 306 | | _transceiver.checkSendSize(os.getBuffer()); |
| | | 307 | | |
| | | 308 | | // |
| | | 309 | | // Notify the request that it's cancelable with this connection. |
| | | 310 | | // This will throw if the request is canceled. |
| | | 311 | | // |
| | | 312 | | og.cancelable(this); |
| | | 313 | | int requestId = 0; |
| | | 314 | | if (response) |
| | | 315 | | { |
| | | 316 | | // |
| | | 317 | | // Create a new unique request ID. |
| | | 318 | | // |
| | | 319 | | requestId = _nextRequestId++; |
| | | 320 | | if (requestId <= 0) |
| | | 321 | | { |
| | | 322 | | _nextRequestId = 1; |
| | | 323 | | requestId = _nextRequestId++; |
| | | 324 | | } |
| | | 325 | | |
| | | 326 | | // |
| | | 327 | | // Fill in the request ID. |
| | | 328 | | // |
| | | 329 | | os.pos(Protocol.headerSize); |
| | | 330 | | os.writeInt(requestId); |
| | | 331 | | } |
| | | 332 | | else if (batchRequestCount > 0) |
| | | 333 | | { |
| | | 334 | | os.pos(Protocol.headerSize); |
| | | 335 | | os.writeInt(batchRequestCount); |
| | | 336 | | } |
| | | 337 | | |
| | | 338 | | og.attachRemoteObserver(initConnectionInfo(), _endpoint, requestId); |
| | | 339 | | |
| | | 340 | | // We're just about to send a request, so we are not inactive anymore. |
| | | 341 | | cancelInactivityTimer(); |
| | | 342 | | |
| | | 343 | | int status = OutgoingAsyncBase.AsyncStatusQueued; |
| | | 344 | | try |
| | | 345 | | { |
| | | 346 | | var message = new OutgoingMessage(og, os, compress, requestId); |
| | | 347 | | status = sendMessage(message); |
| | | 348 | | } |
| | | 349 | | catch (LocalException ex) |
| | | 350 | | { |
| | | 351 | | setState(StateClosed, ex); |
| | | 352 | | Debug.Assert(_exception is not null); |
| | | 353 | | throw _exception; |
| | | 354 | | } |
| | | 355 | | |
| | | 356 | | if (response) |
| | | 357 | | { |
| | | 358 | | // |
| | | 359 | | // Add to the async requests map. |
| | | 360 | | // |
| | | 361 | | _asyncRequests[requestId] = og; |
| | | 362 | | } |
| | | 363 | | return status; |
| | | 364 | | } |
| | | 365 | | } |
| | | 366 | | |
| | | 367 | | internal BatchRequestQueue getBatchRequestQueue() => _batchRequestQueue; |
| | | 368 | | |
| | | 369 | | public void flushBatchRequests(CompressBatch compress) |
| | | 370 | | { |
| | | 371 | | try |
| | | 372 | | { |
| | | 373 | | var completed = new FlushBatchTaskCompletionCallback(); |
| | | 374 | | var outgoing = new ConnectionFlushBatchAsync(this, _instance, completed); |
| | | 375 | | outgoing.invoke(_flushBatchRequests_name, compress, true); |
| | | 376 | | completed.Task.Wait(); |
| | | 377 | | } |
| | | 378 | | catch (AggregateException ex) |
| | | 379 | | { |
| | | 380 | | throw ex.InnerException; |
| | | 381 | | } |
| | | 382 | | } |
| | | 383 | | |
| | | 384 | | public Task flushBatchRequestsAsync( |
| | | 385 | | CompressBatch compress, |
| | | 386 | | IProgress<bool> progress = null, |
| | | 387 | | CancellationToken cancel = default) |
| | | 388 | | { |
| | | 389 | | var completed = new FlushBatchTaskCompletionCallback(progress, cancel); |
| | | 390 | | var outgoing = new ConnectionFlushBatchAsync(this, _instance, completed); |
| | | 391 | | outgoing.invoke(_flushBatchRequests_name, compress, false); |
| | | 392 | | return completed.Task; |
| | | 393 | | } |
| | | 394 | | |
| | | 395 | | private const string _flushBatchRequests_name = "flushBatchRequests"; |
| | | 396 | | |
| | | 397 | | public void disableInactivityCheck() |
| | | 398 | | { |
| | | 399 | | lock (_mutex) |
| | | 400 | | { |
| | | 401 | | cancelInactivityTimer(); |
| | | 402 | | _inactivityTimeout = TimeSpan.Zero; |
| | | 403 | | } |
| | | 404 | | } |
| | | 405 | | |
| | | 406 | | public void setCloseCallback(CloseCallback callback) |
| | | 407 | | { |
| | | 408 | | lock (_mutex) |
| | | 409 | | { |
| | | 410 | | if (_state >= StateClosed) |
| | | 411 | | { |
| | | 412 | | if (callback is not null) |
| | | 413 | | { |
| | | 414 | | _threadPool.execute( |
| | | 415 | | () => |
| | | 416 | | { |
| | | 417 | | try |
| | | 418 | | { |
| | | 419 | | callback(this); |
| | | 420 | | } |
| | | 421 | | catch (System.Exception ex) |
| | | 422 | | { |
| | | 423 | | _logger.error("connection callback exception:\n" + ex + '\n' + _desc); |
| | | 424 | | } |
| | | 425 | | }, |
| | | 426 | | this); |
| | | 427 | | } |
| | | 428 | | } |
| | | 429 | | else |
| | | 430 | | { |
| | | 431 | | _closeCallback = callback; |
| | | 432 | | } |
| | | 433 | | } |
| | | 434 | | } |
| | | 435 | | |
| | | 436 | | public void asyncRequestCanceled(OutgoingAsyncBase outAsync, LocalException ex) |
| | | 437 | | { |
| | | 438 | | // |
| | | 439 | | // NOTE: This isn't called from a thread pool thread. |
| | | 440 | | // |
| | | 441 | | |
| | | 442 | | lock (_mutex) |
| | | 443 | | { |
| | | 444 | | if (_state >= StateClosed) |
| | | 445 | | { |
| | | 446 | | return; // The request has already been or will be shortly notified of the failure. |
| | | 447 | | } |
| | | 448 | | |
| | | 449 | | OutgoingMessage o = _sendStreams.FirstOrDefault(m => m.outAsync == outAsync); |
| | | 450 | | if (o is not null) |
| | | 451 | | { |
| | | 452 | | if (o.requestId > 0) |
| | | 453 | | { |
| | | 454 | | _asyncRequests.Remove(o.requestId); |
| | | 455 | | } |
| | | 456 | | |
| | | 457 | | if (ex is ConnectionAbortedException) |
| | | 458 | | { |
| | | 459 | | setState(StateClosed, ex); |
| | | 460 | | } |
| | | 461 | | else |
| | | 462 | | { |
| | | 463 | | // |
| | | 464 | | // If the request is being sent, don't remove it from the send streams, |
| | | 465 | | // it will be removed once the sending is finished. |
| | | 466 | | // |
| | | 467 | | if (o == _sendStreams.First.Value) |
| | | 468 | | { |
| | | 469 | | o.canceled(); |
| | | 470 | | } |
| | | 471 | | else |
| | | 472 | | { |
| | | 473 | | o.canceled(); |
| | | 474 | | _sendStreams.Remove(o); |
| | | 475 | | } |
| | | 476 | | if (outAsync.exception(ex)) |
| | | 477 | | { |
| | | 478 | | outAsync.invokeExceptionAsync(); |
| | | 479 | | } |
| | | 480 | | } |
| | | 481 | | |
| | | 482 | | if (_closeRequested && _state < StateClosing && _asyncRequests.Count == 0) |
| | | 483 | | { |
| | | 484 | | doApplicationClose(); |
| | | 485 | | } |
| | | 486 | | return; |
| | | 487 | | } |
| | | 488 | | |
| | | 489 | | if (outAsync is OutgoingAsync) |
| | | 490 | | { |
| | | 491 | | foreach (KeyValuePair<int, OutgoingAsyncBase> kvp in _asyncRequests) |
| | | 492 | | { |
| | | 493 | | if (kvp.Value == outAsync) |
| | | 494 | | { |
| | | 495 | | if (ex is ConnectionAbortedException) |
| | | 496 | | { |
| | | 497 | | setState(StateClosed, ex); |
| | | 498 | | } |
| | | 499 | | else |
| | | 500 | | { |
| | | 501 | | _asyncRequests.Remove(kvp.Key); |
| | | 502 | | if (outAsync.exception(ex)) |
| | | 503 | | { |
| | | 504 | | outAsync.invokeExceptionAsync(); |
| | | 505 | | } |
| | | 506 | | } |
| | | 507 | | |
| | | 508 | | if (_closeRequested && _state < StateClosing && _asyncRequests.Count == 0) |
| | | 509 | | { |
| | | 510 | | doApplicationClose(); |
| | | 511 | | } |
| | | 512 | | return; |
| | | 513 | | } |
| | | 514 | | } |
| | | 515 | | } |
| | | 516 | | } |
| | | 517 | | } |
| | | 518 | | |
| | | 519 | | internal EndpointI endpoint() => _endpoint; // No mutex protection necessary, _endpoint is immutable. |
| | | 520 | | |
| | | 521 | | internal Connector connector() => _connector; // No mutex protection necessary, _endpoint is immutable. |
| | | 522 | | |
| | | 523 | | public void setAdapter(ObjectAdapter adapter) |
| | | 524 | | { |
| | | 525 | | if (_connector is null) // server connection |
| | | 526 | | { |
| | | 527 | | throw new InvalidOperationException("setAdapter can only be called on a client connection"); |
| | | 528 | | } |
| | | 529 | | |
| | | 530 | | if (adapter is not null) |
| | | 531 | | { |
| | | 532 | | // Go through the adapter to set the adapter and servant manager on this connection |
| | | 533 | | // to ensure the object adapter is still active. |
| | | 534 | | adapter.setAdapterOnConnection(this); |
| | | 535 | | } |
| | | 536 | | else |
| | | 537 | | { |
| | | 538 | | lock (_mutex) |
| | | 539 | | { |
| | | 540 | | if (_state <= StateNotValidated || _state >= StateClosing) |
| | | 541 | | { |
| | | 542 | | return; |
| | | 543 | | } |
| | | 544 | | _adapter = null; |
| | | 545 | | } |
| | | 546 | | } |
| | | 547 | | |
| | | 548 | | // |
| | | 549 | | // We never change the thread pool with which we were initially |
| | | 550 | | // registered, even if we add or remove an object adapter. |
| | | 551 | | // |
| | | 552 | | } |
| | | 553 | | |
| | | 554 | | public ObjectAdapter getAdapter() |
| | | 555 | | { |
| | | 556 | | lock (_mutex) |
| | | 557 | | { |
| | | 558 | | return _adapter; |
| | | 559 | | } |
| | | 560 | | } |
| | | 561 | | |
| | | 562 | | public Endpoint getEndpoint() => _endpoint; // No mutex protection necessary, _endpoint is immutable. |
| | | 563 | | |
| | | 564 | | public ObjectPrx createProxy(Identity id) |
| | | 565 | | { |
| | | 566 | | ObjectAdapter.checkIdentity(id); |
| | | 567 | | return new ObjectPrxHelper(_instance.referenceFactory().create(id, this)); |
| | | 568 | | } |
| | | 569 | | |
| | | 570 | | public void setAdapterFromAdapter(ObjectAdapter adapter) |
| | | 571 | | { |
| | | 572 | | lock (_mutex) |
| | | 573 | | { |
| | | 574 | | if (_state <= StateNotValidated || _state >= StateClosing) |
| | | 575 | | { |
| | | 576 | | return; |
| | | 577 | | } |
| | | 578 | | Debug.Assert(adapter is not null); // Called by ObjectAdapter::setAdapterOnConnection |
| | | 579 | | _adapter = adapter; |
| | | 580 | | |
| | | 581 | | // Clear cached connection info (if any) as it's no longer accurate. |
| | | 582 | | _info = null; |
| | | 583 | | } |
| | | 584 | | } |
| | | 585 | | |
| | | 586 | | // |
| | | 587 | | // Operations from EventHandler |
| | | 588 | | // |
| | | 589 | | public override bool startAsync(int operation, Ice.Internal.AsyncCallback completedCallback) |
| | | 590 | | { |
| | | 591 | | if (_state >= StateClosed) |
| | | 592 | | { |
| | | 593 | | return false; |
| | | 594 | | } |
| | | 595 | | |
| | | 596 | | if (_threadHopRequired) |
| | | 597 | | { |
| | | 598 | | // Run the I/O on a .NET ThreadPool thread so it survives the initiating Ice worker exiting. |
| | | 599 | | // See ctor for when this is required. |
| | | 600 | | Task.Run(doIO); |
| | | 601 | | } |
| | | 602 | | else |
| | | 603 | | { |
| | | 604 | | doIO(); |
| | | 605 | | } |
| | | 606 | | |
| | | 607 | | return true; |
| | | 608 | | |
| | | 609 | | void doIO() |
| | | 610 | | { |
| | | 611 | | lock (_mutex) |
| | | 612 | | { |
| | | 613 | | if (_state >= StateClosed) |
| | | 614 | | { |
| | | 615 | | completedCallback(this); |
| | | 616 | | return; |
| | | 617 | | } |
| | | 618 | | |
| | | 619 | | try |
| | | 620 | | { |
| | | 621 | | if ((operation & SocketOperation.Write) != 0) |
| | | 622 | | { |
| | | 623 | | if (_observer != null) |
| | | 624 | | { |
| | | 625 | | observerStartWrite(_writeStream.getBuffer()); |
| | | 626 | | } |
| | | 627 | | |
| | | 628 | | bool completedSynchronously = |
| | | 629 | | _transceiver.startWrite( |
| | | 630 | | _writeStream.getBuffer(), |
| | | 631 | | completedCallback, |
| | | 632 | | this, |
| | | 633 | | out bool messageWritten); |
| | | 634 | | |
| | | 635 | | // If the startWrite call wrote the message, we assume the message is sent now for at-most-once |
| | | 636 | | // semantics in the event the connection is closed while the message is still in _sendStreams. |
| | | 637 | | if (messageWritten && _sendStreams.Count > 0) |
| | | 638 | | { |
| | | 639 | | // See finish() code. |
| | | 640 | | _sendStreams.First.Value.isSent = true; |
| | | 641 | | } |
| | | 642 | | |
| | | 643 | | if (completedSynchronously) |
| | | 644 | | { |
| | | 645 | | // If the write completed synchronously, we need to call the completedCallback. |
| | | 646 | | completedCallback(this); |
| | | 647 | | } |
| | | 648 | | } |
| | | 649 | | else if ((operation & SocketOperation.Read) != 0) |
| | | 650 | | { |
| | | 651 | | if (_observer != null && !_readHeader) |
| | | 652 | | { |
| | | 653 | | observerStartRead(_readStream.getBuffer()); |
| | | 654 | | } |
| | | 655 | | |
| | | 656 | | if (_transceiver.startRead(_readStream.getBuffer(), completedCallback, this)) |
| | | 657 | | { |
| | | 658 | | completedCallback(this); |
| | | 659 | | } |
| | | 660 | | } |
| | | 661 | | } |
| | | 662 | | catch (LocalException ex) |
| | | 663 | | { |
| | | 664 | | setState(StateClosed, ex); |
| | | 665 | | completedCallback(this); |
| | | 666 | | } |
| | | 667 | | } |
| | | 668 | | } |
| | | 669 | | } |
| | | 670 | | |
| | | 671 | | public override bool finishAsync(int operation) |
| | | 672 | | { |
| | | 673 | | if (_state >= StateClosed) |
| | | 674 | | { |
| | | 675 | | return false; |
| | | 676 | | } |
| | | 677 | | |
| | | 678 | | try |
| | | 679 | | { |
| | | 680 | | if ((operation & SocketOperation.Write) != 0) |
| | | 681 | | { |
| | | 682 | | Ice.Internal.Buffer buf = _writeStream.getBuffer(); |
| | | 683 | | int start = buf.b.position(); |
| | | 684 | | _transceiver.finishWrite(buf); |
| | | 685 | | if (_instance.traceLevels().network >= 3 && buf.b.position() != start) |
| | | 686 | | { |
| | | 687 | | var s = new StringBuilder("sent "); |
| | | 688 | | s.Append(buf.b.position() - start); |
| | | 689 | | if (!_endpoint.datagram()) |
| | | 690 | | { |
| | | 691 | | s.Append(" of "); |
| | | 692 | | s.Append(buf.b.limit() - start); |
| | | 693 | | } |
| | | 694 | | s.Append(" bytes via "); |
| | | 695 | | s.Append(_endpoint.protocol()); |
| | | 696 | | s.Append('\n'); |
| | | 697 | | s.Append(ToString()); |
| | | 698 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 699 | | } |
| | | 700 | | |
| | | 701 | | if (_observer is not null) |
| | | 702 | | { |
| | | 703 | | observerFinishWrite(_writeStream.getBuffer()); |
| | | 704 | | } |
| | | 705 | | } |
| | | 706 | | else if ((operation & SocketOperation.Read) != 0) |
| | | 707 | | { |
| | | 708 | | Ice.Internal.Buffer buf = _readStream.getBuffer(); |
| | | 709 | | int start = buf.b.position(); |
| | | 710 | | _transceiver.finishRead(buf); |
| | | 711 | | if (_instance.traceLevels().network >= 3 && buf.b.position() != start) |
| | | 712 | | { |
| | | 713 | | var s = new StringBuilder("received "); |
| | | 714 | | if (_endpoint.datagram()) |
| | | 715 | | { |
| | | 716 | | s.Append(buf.b.limit()); |
| | | 717 | | } |
| | | 718 | | else |
| | | 719 | | { |
| | | 720 | | s.Append(buf.b.position() - start); |
| | | 721 | | s.Append(" of "); |
| | | 722 | | s.Append(buf.b.limit() - start); |
| | | 723 | | } |
| | | 724 | | s.Append(" bytes via "); |
| | | 725 | | s.Append(_endpoint.protocol()); |
| | | 726 | | s.Append('\n'); |
| | | 727 | | s.Append(ToString()); |
| | | 728 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 729 | | } |
| | | 730 | | |
| | | 731 | | if (_observer is not null && !_readHeader) |
| | | 732 | | { |
| | | 733 | | observerFinishRead(_readStream.getBuffer()); |
| | | 734 | | } |
| | | 735 | | } |
| | | 736 | | } |
| | | 737 | | catch (LocalException ex) |
| | | 738 | | { |
| | | 739 | | setState(StateClosed, ex); |
| | | 740 | | } |
| | | 741 | | return _state < StateClosed; |
| | | 742 | | } |
| | | 743 | | |
| | | 744 | | public override void message(ThreadPoolCurrent current) |
| | | 745 | | { |
| | | 746 | | StartCallback startCB = null; |
| | | 747 | | Queue<OutgoingMessage> sentCBs = null; |
| | | 748 | | var info = new MessageInfo(); |
| | | 749 | | int upcallCount = 0; |
| | | 750 | | |
| | | 751 | | using var msg = new ThreadPoolMessage(current, _mutex); |
| | | 752 | | lock (_mutex) |
| | | 753 | | { |
| | | 754 | | try |
| | | 755 | | { |
| | | 756 | | if (!msg.startIOScope()) |
| | | 757 | | { |
| | | 758 | | return; |
| | | 759 | | } |
| | | 760 | | |
| | | 761 | | if (_state >= StateClosed) |
| | | 762 | | { |
| | | 763 | | return; |
| | | 764 | | } |
| | | 765 | | |
| | | 766 | | try |
| | | 767 | | { |
| | | 768 | | int writeOp = SocketOperation.None; |
| | | 769 | | int readOp = SocketOperation.None; |
| | | 770 | | |
| | | 771 | | // If writes are ready, write the data from the connection's write buffer (_writeStream) |
| | | 772 | | if ((current.operation & SocketOperation.Write) != 0) |
| | | 773 | | { |
| | | 774 | | if (_observer is not null) |
| | | 775 | | { |
| | | 776 | | observerStartWrite(_writeStream.getBuffer()); |
| | | 777 | | } |
| | | 778 | | writeOp = write(_writeStream.getBuffer()); |
| | | 779 | | if (_observer is not null && (writeOp & SocketOperation.Write) == 0) |
| | | 780 | | { |
| | | 781 | | observerFinishWrite(_writeStream.getBuffer()); |
| | | 782 | | } |
| | | 783 | | } |
| | | 784 | | |
| | | 785 | | // If reads are ready, read the data into the connection's read buffer (_readStream). The data is |
| | | 786 | | // read until: |
| | | 787 | | // - the full message is read (the transport read returns SocketOperationNone) and |
| | | 788 | | // the read buffer is fully filled |
| | | 789 | | // - the read operation on the transport can't continue without blocking |
| | | 790 | | if ((current.operation & SocketOperation.Read) != 0) |
| | | 791 | | { |
| | | 792 | | while (true) |
| | | 793 | | { |
| | | 794 | | Ice.Internal.Buffer buf = _readStream.getBuffer(); |
| | | 795 | | |
| | | 796 | | if (_observer is not null && !_readHeader) |
| | | 797 | | { |
| | | 798 | | observerStartRead(buf); |
| | | 799 | | } |
| | | 800 | | |
| | | 801 | | readOp = read(buf); |
| | | 802 | | if ((readOp & SocketOperation.Read) != 0) |
| | | 803 | | { |
| | | 804 | | // Can't continue without blocking, exit out of the loop. |
| | | 805 | | break; |
| | | 806 | | } |
| | | 807 | | if (_observer is not null && !_readHeader) |
| | | 808 | | { |
| | | 809 | | Debug.Assert(!buf.b.hasRemaining()); |
| | | 810 | | observerFinishRead(buf); |
| | | 811 | | } |
| | | 812 | | |
| | | 813 | | // If read header is true, we're reading a new Ice protocol message and we need to read |
| | | 814 | | // the message header. |
| | | 815 | | if (_readHeader) |
| | | 816 | | { |
| | | 817 | | // The next read will read the remainder of the message. |
| | | 818 | | _readHeader = false; |
| | | 819 | | |
| | | 820 | | _observer?.receivedBytes(Protocol.headerSize); |
| | | 821 | | |
| | | 822 | | // |
| | | 823 | | // Connection is validated on first message. This is only used by |
| | | 824 | | // setState() to check whether or not we can print a connection |
| | | 825 | | // warning (a client might close the connection forcefully if the |
| | | 826 | | // connection isn't validated, we don't want to print a warning |
| | | 827 | | // in this case). |
| | | 828 | | // |
| | | 829 | | _validated = true; |
| | | 830 | | |
| | | 831 | | // Full header should be read because the size of _readStream is always headerSize (14) |
| | | 832 | | // when reading a new message (see the code that sets _readHeader = true). |
| | | 833 | | int pos = _readStream.pos(); |
| | | 834 | | if (pos < Protocol.headerSize) |
| | | 835 | | { |
| | | 836 | | // |
| | | 837 | | // This situation is possible for small UDP packets. |
| | | 838 | | // |
| | | 839 | | throw new MarshalException("Received Ice message with too few bytes in header."); |
| | | 840 | | } |
| | | 841 | | |
| | | 842 | | // Decode the header. |
| | | 843 | | _readStream.pos(0); |
| | | 844 | | byte[] m = new byte[4]; |
| | | 845 | | m[0] = _readStream.readByte(); |
| | | 846 | | m[1] = _readStream.readByte(); |
| | | 847 | | m[2] = _readStream.readByte(); |
| | | 848 | | m[3] = _readStream.readByte(); |
| | | 849 | | if (m[0] != Protocol.magic[0] || m[1] != Protocol.magic[1] || |
| | | 850 | | m[2] != Protocol.magic[2] || m[3] != Protocol.magic[3]) |
| | | 851 | | { |
| | | 852 | | throw new ProtocolException( |
| | | 853 | | $"Bad magic in message header: {m[0]:X2} {m[1]:X2} {m[2]:X2} {m[3]:X2}"); |
| | | 854 | | } |
| | | 855 | | |
| | | 856 | | var pv = new ProtocolVersion(_readStream); |
| | | 857 | | if (pv != Protocol.currentProtocol) |
| | | 858 | | { |
| | | 859 | | throw new MarshalException( |
| | | 860 | | $"Invalid protocol version in message header: {pv.major}.{pv.minor}"); |
| | | 861 | | } |
| | | 862 | | var ev = new EncodingVersion(_readStream); |
| | | 863 | | if (ev != Protocol.currentProtocolEncoding) |
| | | 864 | | { |
| | | 865 | | throw new MarshalException( |
| | | 866 | | $"Invalid protocol encoding version in message header: {ev.major}.{ev.minor}"); |
| | | 867 | | } |
| | | 868 | | |
| | | 869 | | _readStream.readByte(); // messageType |
| | | 870 | | _readStream.readByte(); // compress |
| | | 871 | | int size = _readStream.readInt(); |
| | | 872 | | if (size < Protocol.headerSize) |
| | | 873 | | { |
| | | 874 | | throw new MarshalException($"Received Ice message with unexpected size {size}."); |
| | | 875 | | } |
| | | 876 | | |
| | | 877 | | // Resize the read buffer to the message size. |
| | | 878 | | if (size > _messageSizeMax) |
| | | 879 | | { |
| | | 880 | | Ex.throwMemoryLimitException(size, _messageSizeMax); |
| | | 881 | | } |
| | | 882 | | if (size > _readStream.size()) |
| | | 883 | | { |
| | | 884 | | _readStream.resize(size); |
| | | 885 | | } |
| | | 886 | | _readStream.pos(pos); |
| | | 887 | | } |
| | | 888 | | |
| | | 889 | | if (buf.b.hasRemaining()) |
| | | 890 | | { |
| | | 891 | | if (_endpoint.datagram()) |
| | | 892 | | { |
| | | 893 | | throw new DatagramLimitException(); // The message was truncated. |
| | | 894 | | } |
| | | 895 | | continue; |
| | | 896 | | } |
| | | 897 | | break; |
| | | 898 | | } |
| | | 899 | | } |
| | | 900 | | |
| | | 901 | | // readOp and writeOp are set to the operations that the transport read or write calls from above |
| | | 902 | | // returned. They indicate which operations will need to be monitored by the thread pool's selector |
| | | 903 | | // when this method returns. |
| | | 904 | | int newOp = readOp | writeOp; |
| | | 905 | | |
| | | 906 | | // Operations that are ready. For example, if message was called with SocketOperationRead and the |
| | | 907 | | // transport read returned SocketOperationNone, reads are considered done: there's no additional |
| | | 908 | | // data to read. |
| | | 909 | | int readyOp = current.operation & ~newOp; |
| | | 910 | | |
| | | 911 | | if (_state <= StateNotValidated) |
| | | 912 | | { |
| | | 913 | | // If the connection is still not validated and there's still data to read or write, continue |
| | | 914 | | // waiting for data to read or write. |
| | | 915 | | if (newOp != 0) |
| | | 916 | | { |
| | | 917 | | _threadPool.update(this, current.operation, newOp); |
| | | 918 | | return; |
| | | 919 | | } |
| | | 920 | | |
| | | 921 | | // Initialize the connection if it's not initialized yet. |
| | | 922 | | if (_state == StateNotInitialized && !initialize(current.operation)) |
| | | 923 | | { |
| | | 924 | | return; |
| | | 925 | | } |
| | | 926 | | |
| | | 927 | | // Validate the connection if it's not validated yet. |
| | | 928 | | if (_state <= StateNotValidated && !validate(current.operation)) |
| | | 929 | | { |
| | | 930 | | return; |
| | | 931 | | } |
| | | 932 | | |
| | | 933 | | // The connection is validated and doesn't need additional data to be read or written. So |
| | | 934 | | // unregister it from the thread pool's selector. |
| | | 935 | | _threadPool.unregister(this, current.operation); |
| | | 936 | | |
| | | 937 | | // |
| | | 938 | | // We start out in holding state. |
| | | 939 | | // |
| | | 940 | | setState(StateHolding); |
| | | 941 | | if (_startCallback is not null) |
| | | 942 | | { |
| | | 943 | | startCB = _startCallback; |
| | | 944 | | _startCallback = null; |
| | | 945 | | if (startCB is not null) |
| | | 946 | | { |
| | | 947 | | ++upcallCount; |
| | | 948 | | } |
| | | 949 | | } |
| | | 950 | | } |
| | | 951 | | else |
| | | 952 | | { |
| | | 953 | | Debug.Assert(_state <= StateClosingPending); |
| | | 954 | | |
| | | 955 | | // |
| | | 956 | | // We parse messages first, if we receive a close |
| | | 957 | | // connection message we won't send more messages. |
| | | 958 | | // |
| | | 959 | | if ((readyOp & SocketOperation.Read) != 0) |
| | | 960 | | { |
| | | 961 | | // At this point, the protocol message is fully read and can therefore be decoded by |
| | | 962 | | // parseMessage. parseMessage returns the operation to wait for readiness next. |
| | | 963 | | newOp |= parseMessage(ref info); |
| | | 964 | | upcallCount += info.upcallCount; |
| | | 965 | | } |
| | | 966 | | |
| | | 967 | | if ((readyOp & SocketOperation.Write) != 0) |
| | | 968 | | { |
| | | 969 | | // At this point the message from _writeStream is fully written and the next message can be |
| | | 970 | | // written. |
| | | 971 | | |
| | | 972 | | newOp |= sendNextMessage(out sentCBs); |
| | | 973 | | if (sentCBs is not null) |
| | | 974 | | { |
| | | 975 | | ++upcallCount; |
| | | 976 | | } |
| | | 977 | | } |
| | | 978 | | |
| | | 979 | | // If the connection is not closed yet, we can update the thread pool selector to wait for |
| | | 980 | | // readiness of read, write or both operations. |
| | | 981 | | if (_state < StateClosed) |
| | | 982 | | { |
| | | 983 | | _threadPool.update(this, current.operation, newOp); |
| | | 984 | | } |
| | | 985 | | } |
| | | 986 | | |
| | | 987 | | if (upcallCount == 0) |
| | | 988 | | { |
| | | 989 | | return; // Nothing to execute, we're done! |
| | | 990 | | } |
| | | 991 | | |
| | | 992 | | _upcallCount += upcallCount; |
| | | 993 | | |
| | | 994 | | // There's something to execute so we mark IO as completed to elect a new leader thread and let IO |
| | | 995 | | // be performed on this new leader thread while this thread continues with executing the upcalls. |
| | | 996 | | msg.ioCompleted(); |
| | | 997 | | } |
| | | 998 | | catch (DatagramLimitException) // Expected. |
| | | 999 | | { |
| | | 1000 | | if (_warnUdp) |
| | | 1001 | | { |
| | | 1002 | | _logger.warning($"maximum datagram size of {_readStream.pos()} exceeded"); |
| | | 1003 | | } |
| | | 1004 | | _readStream.resize(Protocol.headerSize); |
| | | 1005 | | _readStream.pos(0); |
| | | 1006 | | _readHeader = true; |
| | | 1007 | | return; |
| | | 1008 | | } |
| | | 1009 | | catch (SocketException ex) |
| | | 1010 | | { |
| | | 1011 | | setState(StateClosed, ex); |
| | | 1012 | | return; |
| | | 1013 | | } |
| | | 1014 | | catch (LocalException ex) |
| | | 1015 | | { |
| | | 1016 | | if (_endpoint.datagram()) |
| | | 1017 | | { |
| | | 1018 | | if (_warn) |
| | | 1019 | | { |
| | | 1020 | | _logger.warning($"datagram connection exception:\n{ex}\n{_desc}"); |
| | | 1021 | | } |
| | | 1022 | | _readStream.resize(Protocol.headerSize); |
| | | 1023 | | _readStream.pos(0); |
| | | 1024 | | _readHeader = true; |
| | | 1025 | | } |
| | | 1026 | | else |
| | | 1027 | | { |
| | | 1028 | | setState(StateClosed, ex); |
| | | 1029 | | } |
| | | 1030 | | return; |
| | | 1031 | | } |
| | | 1032 | | } |
| | | 1033 | | finally |
| | | 1034 | | { |
| | | 1035 | | msg.finishIOScope(); |
| | | 1036 | | } |
| | | 1037 | | } |
| | | 1038 | | |
| | | 1039 | | _threadPool.executeFromThisThread(() => upcall(startCB, sentCBs, info), this); |
| | | 1040 | | } |
| | | 1041 | | |
| | | 1042 | | private void upcall(StartCallback startCB, Queue<OutgoingMessage> sentCBs, MessageInfo info) |
| | | 1043 | | { |
| | | 1044 | | int completedUpcallCount = 0; |
| | | 1045 | | |
| | | 1046 | | // |
| | | 1047 | | // Notify the factory that the connection establishment and |
| | | 1048 | | // validation has completed. |
| | | 1049 | | // |
| | | 1050 | | if (startCB is not null) |
| | | 1051 | | { |
| | | 1052 | | startCB.connectionStartCompleted(this); |
| | | 1053 | | ++completedUpcallCount; |
| | | 1054 | | } |
| | | 1055 | | |
| | | 1056 | | // |
| | | 1057 | | // Notify AMI calls that the message was sent. |
| | | 1058 | | // |
| | | 1059 | | if (sentCBs is not null) |
| | | 1060 | | { |
| | | 1061 | | foreach (OutgoingMessage m in sentCBs) |
| | | 1062 | | { |
| | | 1063 | | if (m.invokeSent) |
| | | 1064 | | { |
| | | 1065 | | m.outAsync.invokeSent(); |
| | | 1066 | | } |
| | | 1067 | | if (m.receivedReply) |
| | | 1068 | | { |
| | | 1069 | | var outAsync = (OutgoingAsync)m.outAsync; |
| | | 1070 | | if (outAsync.response()) |
| | | 1071 | | { |
| | | 1072 | | outAsync.invokeResponse(); |
| | | 1073 | | } |
| | | 1074 | | } |
| | | 1075 | | } |
| | | 1076 | | ++completedUpcallCount; |
| | | 1077 | | } |
| | | 1078 | | |
| | | 1079 | | // |
| | | 1080 | | // Asynchronous replies must be handled outside the thread |
| | | 1081 | | // synchronization, so that nested calls are possible. |
| | | 1082 | | // |
| | | 1083 | | if (info.outAsync is not null) |
| | | 1084 | | { |
| | | 1085 | | info.outAsync.invokeResponse(); |
| | | 1086 | | ++completedUpcallCount; |
| | | 1087 | | } |
| | | 1088 | | |
| | | 1089 | | // |
| | | 1090 | | // Method invocation (or multiple invocations for batch messages) |
| | | 1091 | | // must be done outside the thread synchronization, so that nested |
| | | 1092 | | // calls are possible. |
| | | 1093 | | // |
| | | 1094 | | if (info.requestCount > 0) |
| | | 1095 | | { |
| | | 1096 | | dispatchAll(info.stream, info.requestCount, info.requestId, info.compress, info.adapter); |
| | | 1097 | | } |
| | | 1098 | | |
| | | 1099 | | // |
| | | 1100 | | // Decrease the upcall count. |
| | | 1101 | | // |
| | | 1102 | | bool finished = false; |
| | | 1103 | | if (completedUpcallCount > 0) |
| | | 1104 | | { |
| | | 1105 | | lock (_mutex) |
| | | 1106 | | { |
| | | 1107 | | _upcallCount -= completedUpcallCount; |
| | | 1108 | | if (_upcallCount == 0) |
| | | 1109 | | { |
| | | 1110 | | // Only initiate shutdown if not already initiated. It might have already been initiated if the sent |
| | | 1111 | | // callback or AMI callback was called when the connection was in the closing state. |
| | | 1112 | | if (_state == StateClosing) |
| | | 1113 | | { |
| | | 1114 | | try |
| | | 1115 | | { |
| | | 1116 | | initiateShutdown(); |
| | | 1117 | | } |
| | | 1118 | | catch (Ice.LocalException ex) |
| | | 1119 | | { |
| | | 1120 | | setState(StateClosed, ex); |
| | | 1121 | | } |
| | | 1122 | | } |
| | | 1123 | | else if (_state == StateFinished) |
| | | 1124 | | { |
| | | 1125 | | finished = true; |
| | | 1126 | | _observer?.detach(); |
| | | 1127 | | } |
| | | 1128 | | Monitor.PulseAll(_mutex); |
| | | 1129 | | } |
| | | 1130 | | } |
| | | 1131 | | } |
| | | 1132 | | |
| | | 1133 | | if (finished && _removeFromFactory is not null) |
| | | 1134 | | { |
| | | 1135 | | _removeFromFactory(this); |
| | | 1136 | | } |
| | | 1137 | | } |
| | | 1138 | | |
| | | 1139 | | public override void finished(ThreadPoolCurrent current) |
| | | 1140 | | { |
| | | 1141 | | // Lock the connection here to ensure setState() completes before the code below is executed. This method can |
| | | 1142 | | // be called by the thread pool as soon as setState() calls _threadPool->finish(...). There's no need to lock |
| | | 1143 | | // the mutex for the remainder of the code because the data members accessed by finish() are immutable once |
| | | 1144 | | // _state == StateClosed (and we don't want to hold the mutex when calling upcalls). |
| | | 1145 | | lock (_mutex) |
| | | 1146 | | { |
| | | 1147 | | Debug.Assert(_state == StateClosed); |
| | | 1148 | | } |
| | | 1149 | | |
| | | 1150 | | // |
| | | 1151 | | // If there are no callbacks to call, we don't call ioCompleted() since we're not going |
| | | 1152 | | // to call code that will potentially block (this avoids promoting a new leader and |
| | | 1153 | | // unnecessary thread creation, especially if this is called on shutdown). |
| | | 1154 | | // |
| | | 1155 | | if (_startCallback is null && _sendStreams.Count == 0 && _asyncRequests.Count == 0 && _closeCallback is null) |
| | | 1156 | | { |
| | | 1157 | | finish(); |
| | | 1158 | | return; |
| | | 1159 | | } |
| | | 1160 | | |
| | | 1161 | | current.ioCompleted(); |
| | | 1162 | | _threadPool.executeFromThisThread(finish, this); |
| | | 1163 | | } |
| | | 1164 | | |
| | | 1165 | | private void finish() |
| | | 1166 | | { |
| | | 1167 | | if (!_initialized) |
| | | 1168 | | { |
| | | 1169 | | if (_instance.traceLevels().network >= 2) |
| | | 1170 | | { |
| | | 1171 | | var s = new StringBuilder("failed to "); |
| | | 1172 | | s.Append(_connector is not null ? "establish" : "accept"); |
| | | 1173 | | s.Append(' '); |
| | | 1174 | | s.Append(_endpoint.protocol()); |
| | | 1175 | | s.Append(" connection\n"); |
| | | 1176 | | s.Append(ToString()); |
| | | 1177 | | s.Append('\n'); |
| | | 1178 | | s.Append(_exception); |
| | | 1179 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 1180 | | } |
| | | 1181 | | } |
| | | 1182 | | else |
| | | 1183 | | { |
| | | 1184 | | if (_instance.traceLevels().network >= 1) |
| | | 1185 | | { |
| | | 1186 | | var s = new StringBuilder("closed "); |
| | | 1187 | | s.Append(_endpoint.protocol()); |
| | | 1188 | | s.Append(" connection\n"); |
| | | 1189 | | s.Append(ToString()); |
| | | 1190 | | |
| | | 1191 | | // Trace the cause of most connection closures. |
| | | 1192 | | if (!(_exception is CommunicatorDestroyedException || _exception is ObjectAdapterDeactivatedException)) |
| | | 1193 | | { |
| | | 1194 | | s.Append('\n'); |
| | | 1195 | | s.Append(_exception); |
| | | 1196 | | } |
| | | 1197 | | |
| | | 1198 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 1199 | | } |
| | | 1200 | | } |
| | | 1201 | | |
| | | 1202 | | _startCallback?.connectionStartFailed(this, _exception); |
| | | 1203 | | _startCallback = null; |
| | | 1204 | | |
| | | 1205 | | if (_sendStreams.Count > 0) |
| | | 1206 | | { |
| | | 1207 | | if (!_writeStream.isEmpty()) |
| | | 1208 | | { |
| | | 1209 | | // |
| | | 1210 | | // Return the stream to the outgoing call. This is important for |
| | | 1211 | | // retriable AMI calls which are not marshaled again. |
| | | 1212 | | // |
| | | 1213 | | OutgoingMessage message = _sendStreams.First.Value; |
| | | 1214 | | _writeStream.swap(message.stream); |
| | | 1215 | | |
| | | 1216 | | // |
| | | 1217 | | // The current message might be sent but not yet removed from _sendStreams. If |
| | | 1218 | | // the response has been received in the meantime, we remove the message from |
| | | 1219 | | // _sendStreams to not call finished on a message which is already done. |
| | | 1220 | | // |
| | | 1221 | | if (message.isSent || message.receivedReply) |
| | | 1222 | | { |
| | | 1223 | | if (message.sent() && message.invokeSent) |
| | | 1224 | | { |
| | | 1225 | | message.outAsync.invokeSent(); |
| | | 1226 | | } |
| | | 1227 | | if (message.receivedReply) |
| | | 1228 | | { |
| | | 1229 | | var outAsync = (OutgoingAsync)message.outAsync; |
| | | 1230 | | if (outAsync.response()) |
| | | 1231 | | { |
| | | 1232 | | outAsync.invokeResponse(); |
| | | 1233 | | } |
| | | 1234 | | } |
| | | 1235 | | _sendStreams.RemoveFirst(); |
| | | 1236 | | } |
| | | 1237 | | } |
| | | 1238 | | |
| | | 1239 | | foreach (OutgoingMessage o in _sendStreams) |
| | | 1240 | | { |
| | | 1241 | | o.completed(_exception); |
| | | 1242 | | if (o.requestId > 0) // Make sure finished isn't called twice. |
| | | 1243 | | { |
| | | 1244 | | _asyncRequests.Remove(o.requestId); |
| | | 1245 | | } |
| | | 1246 | | } |
| | | 1247 | | _sendStreams.Clear(); // Must be cleared before _requests because of Outgoing* references in OutgoingMessage |
| | | 1248 | | } |
| | | 1249 | | |
| | | 1250 | | foreach (OutgoingAsyncBase o in _asyncRequests.Values) |
| | | 1251 | | { |
| | | 1252 | | if (o.exception(_exception)) |
| | | 1253 | | { |
| | | 1254 | | o.invokeException(); |
| | | 1255 | | } |
| | | 1256 | | } |
| | | 1257 | | _asyncRequests.Clear(); |
| | | 1258 | | |
| | | 1259 | | // |
| | | 1260 | | // Don't wait to be reaped to reclaim memory allocated by read/write streams. |
| | | 1261 | | // |
| | | 1262 | | _writeStream.clear(); |
| | | 1263 | | _writeStream.getBuffer().clear(); |
| | | 1264 | | _readStream.clear(); |
| | | 1265 | | _readStream.getBuffer().clear(); |
| | | 1266 | | |
| | | 1267 | | if (_exception is ConnectionClosedException or |
| | | 1268 | | CloseConnectionException or |
| | | 1269 | | CommunicatorDestroyedException or |
| | | 1270 | | ObjectAdapterDeactivatedException) |
| | | 1271 | | { |
| | | 1272 | | // Can execute synchronously. Note that we're not within a lock(this) here. |
| | | 1273 | | _closed.SetResult(); |
| | | 1274 | | } |
| | | 1275 | | else |
| | | 1276 | | { |
| | | 1277 | | Debug.Assert(_exception is not null); |
| | | 1278 | | _closed.SetException(_exception); |
| | | 1279 | | } |
| | | 1280 | | |
| | | 1281 | | if (_closeCallback is not null) |
| | | 1282 | | { |
| | | 1283 | | try |
| | | 1284 | | { |
| | | 1285 | | _closeCallback(this); |
| | | 1286 | | } |
| | | 1287 | | catch (System.Exception ex) |
| | | 1288 | | { |
| | | 1289 | | _logger.error("connection callback exception:\n" + ex + '\n' + _desc); |
| | | 1290 | | } |
| | | 1291 | | _closeCallback = null; |
| | | 1292 | | } |
| | | 1293 | | |
| | | 1294 | | // |
| | | 1295 | | // This must be done last as this will cause waitUntilFinished() to return (and communicator |
| | | 1296 | | // objects such as the timer might be destroyed too). |
| | | 1297 | | // |
| | | 1298 | | bool finished = false; |
| | | 1299 | | lock (_mutex) |
| | | 1300 | | { |
| | | 1301 | | setState(StateFinished); |
| | | 1302 | | |
| | | 1303 | | if (_upcallCount == 0) |
| | | 1304 | | { |
| | | 1305 | | finished = true; |
| | | 1306 | | _observer?.detach(); |
| | | 1307 | | } |
| | | 1308 | | } |
| | | 1309 | | |
| | | 1310 | | if (finished && _removeFromFactory is not null) |
| | | 1311 | | { |
| | | 1312 | | _removeFromFactory(this); |
| | | 1313 | | } |
| | | 1314 | | } |
| | | 1315 | | |
| | | 1316 | | /// <inheritdoc/> |
| | | 1317 | | public override string ToString() => _desc; // No mutex lock, _desc is immutable. |
| | | 1318 | | |
| | | 1319 | | /// <inheritdoc/> |
| | | 1320 | | public string type() => _type; // No mutex lock, _type is immutable. |
| | | 1321 | | |
| | | 1322 | | /// <inheritdoc/> |
| | | 1323 | | public ConnectionInfo getInfo() |
| | | 1324 | | { |
| | | 1325 | | lock (_mutex) |
| | | 1326 | | { |
| | | 1327 | | if (_state >= StateClosed) |
| | | 1328 | | { |
| | | 1329 | | throw _exception; |
| | | 1330 | | } |
| | | 1331 | | return initConnectionInfo(); |
| | | 1332 | | } |
| | | 1333 | | } |
| | | 1334 | | |
| | | 1335 | | /// <inheritdoc/> |
| | | 1336 | | public void setBufferSize(int rcvSize, int sndSize) |
| | | 1337 | | { |
| | | 1338 | | lock (_mutex) |
| | | 1339 | | { |
| | | 1340 | | if (_state >= StateClosed) |
| | | 1341 | | { |
| | | 1342 | | throw _exception; |
| | | 1343 | | } |
| | | 1344 | | _transceiver.setBufferSize(rcvSize, sndSize); |
| | | 1345 | | _info = null; // Invalidate the cached connection info |
| | | 1346 | | } |
| | | 1347 | | } |
| | | 1348 | | |
| | | 1349 | | public void exception(LocalException ex) |
| | | 1350 | | { |
| | | 1351 | | lock (_mutex) |
| | | 1352 | | { |
| | | 1353 | | setState(StateClosed, ex); |
| | | 1354 | | } |
| | | 1355 | | } |
| | | 1356 | | |
| | | 1357 | | public Ice.Internal.ThreadPool getThreadPool() => _threadPool; |
| | | 1358 | | |
| | | 1359 | | internal ConnectionI( |
| | | 1360 | | Instance instance, |
| | | 1361 | | Transceiver transceiver, |
| | | 1362 | | Connector connector, // null for incoming connections, non-null for outgoing connections |
| | | 1363 | | EndpointI endpoint, |
| | | 1364 | | ObjectAdapter adapter, |
| | | 1365 | | Action<ConnectionI> removeFromFactory, // can be null |
| | | 1366 | | ConnectionOptions options) |
| | | 1367 | | { |
| | | 1368 | | _instance = instance; |
| | | 1369 | | _desc = transceiver.ToString(); |
| | | 1370 | | _type = transceiver.protocol(); |
| | | 1371 | | _connector = connector; |
| | | 1372 | | _endpoint = endpoint; |
| | | 1373 | | _adapter = adapter; |
| | | 1374 | | InitializationData initData = instance.initializationData(); |
| | | 1375 | | _logger = initData.logger; // Cached for better performance. |
| | | 1376 | | _traceLevels = instance.traceLevels(); // Cached for better performance. |
| | | 1377 | | _connectTimeout = options.connectTimeout; |
| | | 1378 | | _closeTimeout = options.closeTimeout; // not used for datagram connections |
| | | 1379 | | // suppress inactivity timeout for datagram connections |
| | | 1380 | | _inactivityTimeout = endpoint.datagram() ? TimeSpan.Zero : options.inactivityTimeout; |
| | | 1381 | | _maxDispatches = options.maxDispatches; |
| | | 1382 | | _removeFromFactory = removeFromFactory; |
| | | 1383 | | _warn = initData.properties.getIcePropertyAsInt("Ice.Warn.Connections") > 0; |
| | | 1384 | | _warnUdp = initData.properties.getIcePropertyAsInt("Ice.Warn.Datagrams") > 0; |
| | | 1385 | | _nextRequestId = 1; |
| | | 1386 | | _messageSizeMax = connector is null ? adapter.messageSizeMax() : instance.messageSizeMax(); |
| | | 1387 | | _batchRequestQueue = new BatchRequestQueue(instance, _endpoint.datagram()); |
| | | 1388 | | _readStream = new InputStream(instance, Protocol.currentProtocolEncoding); |
| | | 1389 | | _readHeader = false; |
| | | 1390 | | _readStreamPos = -1; |
| | | 1391 | | _writeStream = new OutputStream(); // temporary stream |
| | | 1392 | | _writeStreamPos = -1; |
| | | 1393 | | _upcallCount = 0; |
| | | 1394 | | _state = StateNotInitialized; |
| | | 1395 | | |
| | | 1396 | | _compressionLevel = initData.properties.getIcePropertyAsInt("Ice.Compression.Level"); |
| | | 1397 | | if (_compressionLevel < 1) |
| | | 1398 | | { |
| | | 1399 | | _compressionLevel = 1; |
| | | 1400 | | } |
| | | 1401 | | else if (_compressionLevel > 9) |
| | | 1402 | | { |
| | | 1403 | | _compressionLevel = 9; |
| | | 1404 | | } |
| | | 1405 | | |
| | | 1406 | | if (options.idleTimeout > TimeSpan.Zero && !endpoint.datagram()) |
| | | 1407 | | { |
| | | 1408 | | _idleTimeoutTransceiver = new IdleTimeoutTransceiverDecorator( |
| | | 1409 | | transceiver, |
| | | 1410 | | this, |
| | | 1411 | | options.idleTimeout, |
| | | 1412 | | options.enableIdleCheck); |
| | | 1413 | | transceiver = _idleTimeoutTransceiver; |
| | | 1414 | | } |
| | | 1415 | | _transceiver = transceiver; |
| | | 1416 | | |
| | | 1417 | | try |
| | | 1418 | | { |
| | | 1419 | | if (connector is null) |
| | | 1420 | | { |
| | | 1421 | | // adapter is always set for incoming connections |
| | | 1422 | | Debug.Assert(adapter is not null); |
| | | 1423 | | _threadPool = adapter.getThreadPool(); |
| | | 1424 | | } |
| | | 1425 | | else |
| | | 1426 | | { |
| | | 1427 | | // we use the client thread pool for outgoing connections, even if there is an |
| | | 1428 | | // object adapter with its own thread pool. |
| | | 1429 | | _threadPool = instance.clientThreadPool(); |
| | | 1430 | | } |
| | | 1431 | | // On Windows, async socket I/O initiated on a thread that subsequently terminates is cancelled by the OS |
| | | 1432 | | // with SocketError.OperationAborted. The Ice thread pool can reap workers idle past ThreadIdleTime when |
| | | 1433 | | // SizeMax > 1, so in that combination we hop the I/O onto the .NET ThreadPool (whose threads are managed |
| | | 1434 | | // by the runtime and not reaped while owning pending I/O). Other platforms and fixed-size Ice pools don't |
| | | 1435 | | // need the hop. See startAsync. |
| | | 1436 | | _threadHopRequired = AssemblyUtil.isWindows && _threadPool.canShrink; |
| | | 1437 | | _threadPool.initialize(this); |
| | | 1438 | | } |
| | | 1439 | | catch (LocalException) |
| | | 1440 | | { |
| | | 1441 | | throw; |
| | | 1442 | | } |
| | | 1443 | | catch (System.Exception ex) |
| | | 1444 | | { |
| | | 1445 | | throw new SyscallException(ex); |
| | | 1446 | | } |
| | | 1447 | | } |
| | | 1448 | | |
| | | 1449 | | /// <summary> |
| | | 1450 | | /// Aborts the connection with a <see cref="ConnectionAbortedException" /> if the connection is active and |
| | | 1451 | | /// does not receive a byte for some time. See the IdleTimeoutTransceiverDecorator. |
| | | 1452 | | /// </summary> |
| | | 1453 | | internal void idleCheck(TimeSpan idleTimeout) |
| | | 1454 | | { |
| | | 1455 | | lock (_mutex) |
| | | 1456 | | { |
| | | 1457 | | if (_state == StateActive && _idleTimeoutTransceiver!.idleCheckEnabled) |
| | | 1458 | | { |
| | | 1459 | | int idleTimeoutInSeconds = (int)idleTimeout.TotalSeconds; |
| | | 1460 | | |
| | | 1461 | | setState( |
| | | 1462 | | StateClosed, |
| | | 1463 | | new ConnectionAbortedException( |
| | | 1464 | | $"Connection aborted by the idle check because it did not receive any bytes for {idleTimeoutInSe |
| | | 1465 | | closedByApplication: false)); |
| | | 1466 | | } |
| | | 1467 | | // else nothing to do |
| | | 1468 | | } |
| | | 1469 | | } |
| | | 1470 | | |
| | | 1471 | | internal void sendHeartbeat() |
| | | 1472 | | { |
| | | 1473 | | Debug.Assert(!_endpoint.datagram()); |
| | | 1474 | | |
| | | 1475 | | lock (_mutex) |
| | | 1476 | | { |
| | | 1477 | | if (_state == StateActive || _state == StateHolding || _state == StateClosing) |
| | | 1478 | | { |
| | | 1479 | | // We check if the connection has become inactive. |
| | | 1480 | | if ( |
| | | 1481 | | _inactivityTimer is null && // timer not already scheduled |
| | | 1482 | | _inactivityTimeout > TimeSpan.Zero && // inactivity timeout is enabled |
| | | 1483 | | _state == StateActive && // only schedule the timer if the connection is active |
| | | 1484 | | _dispatchCount == 0 && // no pending dispatch |
| | | 1485 | | _asyncRequests.Count == 0 && // no pending invocation |
| | | 1486 | | _readHeader && // we're not waiting for the remainder of an incoming message |
| | | 1487 | | _sendStreams.Count <= 1) // there is at most one pending outgoing message |
| | | 1488 | | { |
| | | 1489 | | // We may become inactive while the peer is back-pressuring us. In this case, we only schedule the |
| | | 1490 | | // inactivity timer if there is no pending outgoing message or the pending outgoing message is a |
| | | 1491 | | // heartbeat. |
| | | 1492 | | |
| | | 1493 | | // The stream of the first _sendStreams message is in _writeStream. |
| | | 1494 | | if (_sendStreams.Count == 0 || isHeartbeat(_writeStream)) |
| | | 1495 | | { |
| | | 1496 | | scheduleInactivityTimer(); |
| | | 1497 | | } |
| | | 1498 | | } |
| | | 1499 | | |
| | | 1500 | | // We send a heartbeat to the peer to generate a "write" on the connection. This write in turns creates |
| | | 1501 | | // a read on the peer, and resets the peer's idle check timer. When _sendStream is not empty, there is |
| | | 1502 | | // already an outstanding write, so we don't need to send a heartbeat. It's possible the first message |
| | | 1503 | | // of _sendStreams was already sent but not yet removed from _sendStreams: it means the last write |
| | | 1504 | | // occurred very recently, which is good enough with respect to the idle check. |
| | | 1505 | | // As a result of this optimization, the only possible heartbeat in _sendStreams is the first |
| | | 1506 | | // _sendStreams message. |
| | | 1507 | | if (_sendStreams.Count == 0) |
| | | 1508 | | { |
| | | 1509 | | var os = new OutputStream(Protocol.currentProtocolEncoding); |
| | | 1510 | | os.writeBlob(Protocol.magic); |
| | | 1511 | | ProtocolVersion.ice_write(os, Protocol.currentProtocol); |
| | | 1512 | | EncodingVersion.ice_write(os, Protocol.currentProtocolEncoding); |
| | | 1513 | | os.writeByte(Protocol.validateConnectionMsg); |
| | | 1514 | | os.writeByte(0); |
| | | 1515 | | os.writeInt(Protocol.headerSize); // Message size. |
| | | 1516 | | try |
| | | 1517 | | { |
| | | 1518 | | _ = sendMessage(new OutgoingMessage(os, compress: false)); |
| | | 1519 | | } |
| | | 1520 | | catch (LocalException ex) |
| | | 1521 | | { |
| | | 1522 | | setState(StateClosed, ex); |
| | | 1523 | | } |
| | | 1524 | | } |
| | | 1525 | | } |
| | | 1526 | | // else nothing to do |
| | | 1527 | | } |
| | | 1528 | | |
| | | 1529 | | static bool isHeartbeat(OutputStream stream) => |
| | | 1530 | | stream.getBuffer().b.get(8) == Protocol.validateConnectionMsg; |
| | | 1531 | | } |
| | | 1532 | | |
| | | 1533 | | private const int StateNotInitialized = 0; |
| | | 1534 | | private const int StateNotValidated = 1; |
| | | 1535 | | private const int StateActive = 2; |
| | | 1536 | | private const int StateHolding = 3; |
| | | 1537 | | private const int StateClosing = 4; |
| | | 1538 | | private const int StateClosingPending = 5; |
| | | 1539 | | private const int StateClosed = 6; |
| | | 1540 | | private const int StateFinished = 7; |
| | | 1541 | | |
| | | 1542 | | private static ConnectionState toConnectionState(int state) => connectionStateMap[state]; |
| | | 1543 | | |
| | | 1544 | | private void setState(int state, LocalException ex) |
| | | 1545 | | { |
| | | 1546 | | // |
| | | 1547 | | // If setState() is called with an exception, then only closed |
| | | 1548 | | // and closing states are permissible. |
| | | 1549 | | // |
| | | 1550 | | Debug.Assert(state >= StateClosing); |
| | | 1551 | | |
| | | 1552 | | if (_state == state) // Don't switch twice. |
| | | 1553 | | { |
| | | 1554 | | return; |
| | | 1555 | | } |
| | | 1556 | | |
| | | 1557 | | if (_exception is null) |
| | | 1558 | | { |
| | | 1559 | | // |
| | | 1560 | | // If we are in closed state, an exception must be set. |
| | | 1561 | | // |
| | | 1562 | | Debug.Assert(_state != StateClosed); |
| | | 1563 | | |
| | | 1564 | | _exception = ex; |
| | | 1565 | | |
| | | 1566 | | // |
| | | 1567 | | // We don't warn if we are not validated. |
| | | 1568 | | // |
| | | 1569 | | if (_warn && _validated) |
| | | 1570 | | { |
| | | 1571 | | // |
| | | 1572 | | // Don't warn about certain expected exceptions. |
| | | 1573 | | // |
| | | 1574 | | if (!(_exception is CloseConnectionException || |
| | | 1575 | | _exception is ConnectionClosedException || |
| | | 1576 | | _exception is CommunicatorDestroyedException || |
| | | 1577 | | _exception is ObjectAdapterDeactivatedException || |
| | | 1578 | | (_exception is ConnectionLostException && _state >= StateClosing))) |
| | | 1579 | | { |
| | | 1580 | | warning("connection exception", _exception); |
| | | 1581 | | } |
| | | 1582 | | } |
| | | 1583 | | } |
| | | 1584 | | |
| | | 1585 | | // |
| | | 1586 | | // We must set the new state before we notify requests of any |
| | | 1587 | | // exceptions. Otherwise new requests may retry on a |
| | | 1588 | | // connection that is not yet marked as closed or closing. |
| | | 1589 | | // |
| | | 1590 | | setState(state); |
| | | 1591 | | } |
| | | 1592 | | |
| | | 1593 | | private void setState(int state) |
| | | 1594 | | { |
| | | 1595 | | // |
| | | 1596 | | // We don't want to send close connection messages if the endpoint |
| | | 1597 | | // only supports oneway transmission from client to server. |
| | | 1598 | | // |
| | | 1599 | | if (_endpoint.datagram() && state == StateClosing) |
| | | 1600 | | { |
| | | 1601 | | state = StateClosed; |
| | | 1602 | | } |
| | | 1603 | | |
| | | 1604 | | // |
| | | 1605 | | // Skip graceful shutdown if we are destroyed before validation. |
| | | 1606 | | // |
| | | 1607 | | if (_state <= StateNotValidated && state == StateClosing) |
| | | 1608 | | { |
| | | 1609 | | state = StateClosed; |
| | | 1610 | | } |
| | | 1611 | | |
| | | 1612 | | if (_state == state) // Don't switch twice. |
| | | 1613 | | { |
| | | 1614 | | return; |
| | | 1615 | | } |
| | | 1616 | | |
| | | 1617 | | if (state > StateActive) |
| | | 1618 | | { |
| | | 1619 | | // Dispose the inactivity timer, if not null. |
| | | 1620 | | cancelInactivityTimer(); |
| | | 1621 | | } |
| | | 1622 | | |
| | | 1623 | | try |
| | | 1624 | | { |
| | | 1625 | | switch (state) |
| | | 1626 | | { |
| | | 1627 | | case StateNotInitialized: |
| | | 1628 | | { |
| | | 1629 | | Debug.Assert(false); |
| | | 1630 | | break; |
| | | 1631 | | } |
| | | 1632 | | |
| | | 1633 | | case StateNotValidated: |
| | | 1634 | | { |
| | | 1635 | | if (_state != StateNotInitialized) |
| | | 1636 | | { |
| | | 1637 | | Debug.Assert(_state == StateClosed); |
| | | 1638 | | return; |
| | | 1639 | | } |
| | | 1640 | | break; |
| | | 1641 | | } |
| | | 1642 | | |
| | | 1643 | | case StateActive: |
| | | 1644 | | { |
| | | 1645 | | // |
| | | 1646 | | // Can only switch to active from holding or not validated. |
| | | 1647 | | // |
| | | 1648 | | if (_state != StateHolding && _state != StateNotValidated) |
| | | 1649 | | { |
| | | 1650 | | return; |
| | | 1651 | | } |
| | | 1652 | | |
| | | 1653 | | if (_maxDispatches <= 0 || _dispatchCount < _maxDispatches) |
| | | 1654 | | { |
| | | 1655 | | _threadPool.register(this, SocketOperation.Read); |
| | | 1656 | | _idleTimeoutTransceiver?.enableIdleCheck(); |
| | | 1657 | | } |
| | | 1658 | | // else don't resume reading since we're at or over the _maxDispatches limit. |
| | | 1659 | | |
| | | 1660 | | break; |
| | | 1661 | | } |
| | | 1662 | | |
| | | 1663 | | case StateHolding: |
| | | 1664 | | { |
| | | 1665 | | // |
| | | 1666 | | // Can only switch to holding from active or not validated. |
| | | 1667 | | // |
| | | 1668 | | if (_state != StateActive && _state != StateNotValidated) |
| | | 1669 | | { |
| | | 1670 | | return; |
| | | 1671 | | } |
| | | 1672 | | |
| | | 1673 | | if (_state == StateActive && (_maxDispatches <= 0 || _dispatchCount < _maxDispatches)) |
| | | 1674 | | { |
| | | 1675 | | _threadPool.unregister(this, SocketOperation.Read); |
| | | 1676 | | _idleTimeoutTransceiver?.disableIdleCheck(); |
| | | 1677 | | } |
| | | 1678 | | // else reads are already disabled because the _maxDispatches limit is reached or exceeded. |
| | | 1679 | | |
| | | 1680 | | break; |
| | | 1681 | | } |
| | | 1682 | | |
| | | 1683 | | case StateClosing: |
| | | 1684 | | case StateClosingPending: |
| | | 1685 | | { |
| | | 1686 | | // |
| | | 1687 | | // Can't change back from closing pending. |
| | | 1688 | | // |
| | | 1689 | | if (_state >= StateClosingPending) |
| | | 1690 | | { |
| | | 1691 | | return; |
| | | 1692 | | } |
| | | 1693 | | break; |
| | | 1694 | | } |
| | | 1695 | | |
| | | 1696 | | case StateClosed: |
| | | 1697 | | { |
| | | 1698 | | if (_state == StateFinished) |
| | | 1699 | | { |
| | | 1700 | | return; |
| | | 1701 | | } |
| | | 1702 | | |
| | | 1703 | | _batchRequestQueue.destroy(_exception); |
| | | 1704 | | _threadPool.finish(this); |
| | | 1705 | | _transceiver.close(); |
| | | 1706 | | break; |
| | | 1707 | | } |
| | | 1708 | | |
| | | 1709 | | case StateFinished: |
| | | 1710 | | { |
| | | 1711 | | Debug.Assert(_state == StateClosed); |
| | | 1712 | | _transceiver.destroy(); |
| | | 1713 | | break; |
| | | 1714 | | } |
| | | 1715 | | } |
| | | 1716 | | } |
| | | 1717 | | catch (LocalException ex) |
| | | 1718 | | { |
| | | 1719 | | _logger.error("unexpected connection exception:\n" + ex + "\n" + _transceiver.ToString()); |
| | | 1720 | | } |
| | | 1721 | | |
| | | 1722 | | if (_instance.initializationData().observer is not null) |
| | | 1723 | | { |
| | | 1724 | | ConnectionState oldState = toConnectionState(_state); |
| | | 1725 | | ConnectionState newState = toConnectionState(state); |
| | | 1726 | | if (oldState != newState) |
| | | 1727 | | { |
| | | 1728 | | _observer = _instance.initializationData().observer.getConnectionObserver( |
| | | 1729 | | initConnectionInfo(), |
| | | 1730 | | _endpoint, |
| | | 1731 | | newState, |
| | | 1732 | | _observer); |
| | | 1733 | | if (_observer is not null) |
| | | 1734 | | { |
| | | 1735 | | _observer.attach(); |
| | | 1736 | | } |
| | | 1737 | | else |
| | | 1738 | | { |
| | | 1739 | | _writeStreamPos = -1; |
| | | 1740 | | _readStreamPos = -1; |
| | | 1741 | | } |
| | | 1742 | | } |
| | | 1743 | | if (_observer is not null && state == StateClosed && _exception is not null) |
| | | 1744 | | { |
| | | 1745 | | if (!(_exception is CloseConnectionException || |
| | | 1746 | | _exception is ConnectionClosedException || |
| | | 1747 | | _exception is CommunicatorDestroyedException || |
| | | 1748 | | _exception is ObjectAdapterDeactivatedException || |
| | | 1749 | | (_exception is ConnectionLostException && _state >= StateClosing))) |
| | | 1750 | | { |
| | | 1751 | | _observer.failed(_exception.ice_id()); |
| | | 1752 | | } |
| | | 1753 | | } |
| | | 1754 | | } |
| | | 1755 | | _state = state; |
| | | 1756 | | |
| | | 1757 | | Monitor.PulseAll(_mutex); |
| | | 1758 | | |
| | | 1759 | | if (_state == StateClosing && _upcallCount == 0) |
| | | 1760 | | { |
| | | 1761 | | try |
| | | 1762 | | { |
| | | 1763 | | initiateShutdown(); |
| | | 1764 | | } |
| | | 1765 | | catch (LocalException ex) |
| | | 1766 | | { |
| | | 1767 | | setState(StateClosed, ex); |
| | | 1768 | | } |
| | | 1769 | | } |
| | | 1770 | | } |
| | | 1771 | | |
| | | 1772 | | private void initiateShutdown() |
| | | 1773 | | { |
| | | 1774 | | Debug.Assert(_state == StateClosing && _upcallCount == 0); |
| | | 1775 | | |
| | | 1776 | | if (_shutdownInitiated) |
| | | 1777 | | { |
| | | 1778 | | return; |
| | | 1779 | | } |
| | | 1780 | | _shutdownInitiated = true; |
| | | 1781 | | |
| | | 1782 | | if (!_endpoint.datagram()) |
| | | 1783 | | { |
| | | 1784 | | // |
| | | 1785 | | // Before we shut down, we send a close connection message. |
| | | 1786 | | // |
| | | 1787 | | var os = new OutputStream(Protocol.currentProtocolEncoding); |
| | | 1788 | | os.writeBlob(Protocol.magic); |
| | | 1789 | | ProtocolVersion.ice_write(os, Protocol.currentProtocol); |
| | | 1790 | | EncodingVersion.ice_write(os, Protocol.currentProtocolEncoding); |
| | | 1791 | | os.writeByte(Protocol.closeConnectionMsg); |
| | | 1792 | | os.writeByte(0); // Compression status: always zero for close connection. |
| | | 1793 | | os.writeInt(Protocol.headerSize); // Message size. |
| | | 1794 | | |
| | | 1795 | | scheduleCloseTimer(); |
| | | 1796 | | |
| | | 1797 | | if ((sendMessage(new OutgoingMessage(os, compress: false)) & OutgoingAsyncBase.AsyncStatusSent) != 0) |
| | | 1798 | | { |
| | | 1799 | | setState(StateClosingPending); |
| | | 1800 | | |
| | | 1801 | | // |
| | | 1802 | | // Notify the transceiver of the graceful connection closure. |
| | | 1803 | | // |
| | | 1804 | | int op = _transceiver.closing(true, _exception); |
| | | 1805 | | if (op != 0) |
| | | 1806 | | { |
| | | 1807 | | _threadPool.register(this, op); |
| | | 1808 | | } |
| | | 1809 | | } |
| | | 1810 | | } |
| | | 1811 | | } |
| | | 1812 | | |
| | | 1813 | | private bool initialize(int operation) |
| | | 1814 | | { |
| | | 1815 | | int s = _transceiver.initialize(_readStream.getBuffer(), _writeStream.getBuffer(), ref _hasMoreData); |
| | | 1816 | | if (s != SocketOperation.None) |
| | | 1817 | | { |
| | | 1818 | | _threadPool.update(this, operation, s); |
| | | 1819 | | return false; |
| | | 1820 | | } |
| | | 1821 | | |
| | | 1822 | | // |
| | | 1823 | | // Update the connection description once the transceiver is initialized. |
| | | 1824 | | // |
| | | 1825 | | _desc = _transceiver.ToString(); |
| | | 1826 | | _initialized = true; |
| | | 1827 | | setState(StateNotValidated); |
| | | 1828 | | |
| | | 1829 | | return true; |
| | | 1830 | | } |
| | | 1831 | | |
| | | 1832 | | private bool validate(int operation) |
| | | 1833 | | { |
| | | 1834 | | if (!_endpoint.datagram()) // Datagram connections are always implicitly validated. |
| | | 1835 | | { |
| | | 1836 | | if (_connector is null) // The server side has the active role for connection validation. |
| | | 1837 | | { |
| | | 1838 | | if (_writeStream.size() == 0) |
| | | 1839 | | { |
| | | 1840 | | _writeStream.writeBlob(Protocol.magic); |
| | | 1841 | | ProtocolVersion.ice_write(_writeStream, Protocol.currentProtocol); |
| | | 1842 | | EncodingVersion.ice_write(_writeStream, Protocol.currentProtocolEncoding); |
| | | 1843 | | _writeStream.writeByte(Protocol.validateConnectionMsg); |
| | | 1844 | | _writeStream.writeByte(0); // Compression status (always zero for validate connection). |
| | | 1845 | | _writeStream.writeInt(Protocol.headerSize); // Message size. |
| | | 1846 | | TraceUtil.traceSend(_writeStream, _instance, this, _logger, _traceLevels); |
| | | 1847 | | _writeStream.prepareWrite(); |
| | | 1848 | | } |
| | | 1849 | | |
| | | 1850 | | if (_observer is not null) |
| | | 1851 | | { |
| | | 1852 | | observerStartWrite(_writeStream.getBuffer()); |
| | | 1853 | | } |
| | | 1854 | | |
| | | 1855 | | if (_writeStream.pos() != _writeStream.size()) |
| | | 1856 | | { |
| | | 1857 | | int op = write(_writeStream.getBuffer()); |
| | | 1858 | | if (op != 0) |
| | | 1859 | | { |
| | | 1860 | | _threadPool.update(this, operation, op); |
| | | 1861 | | return false; |
| | | 1862 | | } |
| | | 1863 | | } |
| | | 1864 | | |
| | | 1865 | | if (_observer is not null) |
| | | 1866 | | { |
| | | 1867 | | observerFinishWrite(_writeStream.getBuffer()); |
| | | 1868 | | } |
| | | 1869 | | } |
| | | 1870 | | else // The client side has the passive role for connection validation. |
| | | 1871 | | { |
| | | 1872 | | if (_readStream.size() == 0) |
| | | 1873 | | { |
| | | 1874 | | _readStream.resize(Protocol.headerSize); |
| | | 1875 | | _readStream.pos(0); |
| | | 1876 | | } |
| | | 1877 | | |
| | | 1878 | | if (_observer is not null) |
| | | 1879 | | { |
| | | 1880 | | observerStartRead(_readStream.getBuffer()); |
| | | 1881 | | } |
| | | 1882 | | |
| | | 1883 | | if (_readStream.pos() != _readStream.size()) |
| | | 1884 | | { |
| | | 1885 | | int op = read(_readStream.getBuffer()); |
| | | 1886 | | if (op != 0) |
| | | 1887 | | { |
| | | 1888 | | _threadPool.update(this, operation, op); |
| | | 1889 | | return false; |
| | | 1890 | | } |
| | | 1891 | | } |
| | | 1892 | | |
| | | 1893 | | if (_observer is not null) |
| | | 1894 | | { |
| | | 1895 | | observerFinishRead(_readStream.getBuffer()); |
| | | 1896 | | } |
| | | 1897 | | |
| | | 1898 | | _validated = true; |
| | | 1899 | | |
| | | 1900 | | Debug.Assert(_readStream.pos() == Protocol.headerSize); |
| | | 1901 | | _readStream.pos(0); |
| | | 1902 | | byte[] m = _readStream.readBlob(4); |
| | | 1903 | | if (m[0] != Protocol.magic[0] || m[1] != Protocol.magic[1] || |
| | | 1904 | | m[2] != Protocol.magic[2] || m[3] != Protocol.magic[3]) |
| | | 1905 | | { |
| | | 1906 | | throw new ProtocolException( |
| | | 1907 | | $"Bad magic in message header: {m[0]:X2} {m[1]:X2} {m[2]:X2} {m[3]:X2}"); |
| | | 1908 | | } |
| | | 1909 | | |
| | | 1910 | | var pv = new ProtocolVersion(_readStream); |
| | | 1911 | | if (pv != Protocol.currentProtocol) |
| | | 1912 | | { |
| | | 1913 | | throw new MarshalException( |
| | | 1914 | | $"Invalid protocol version in message header: {pv.major}.{pv.minor}"); |
| | | 1915 | | } |
| | | 1916 | | var ev = new EncodingVersion(_readStream); |
| | | 1917 | | if (ev != Protocol.currentProtocolEncoding) |
| | | 1918 | | { |
| | | 1919 | | throw new MarshalException( |
| | | 1920 | | $"Invalid protocol encoding version in message header: {ev.major}.{ev.minor}"); |
| | | 1921 | | } |
| | | 1922 | | |
| | | 1923 | | byte messageType = _readStream.readByte(); |
| | | 1924 | | if (messageType != Protocol.validateConnectionMsg) |
| | | 1925 | | { |
| | | 1926 | | throw new ProtocolException( |
| | | 1927 | | $"Received message of type {messageType} over a connection that is not yet validated."); |
| | | 1928 | | } |
| | | 1929 | | _readStream.readByte(); // Ignore compression status for validate connection. |
| | | 1930 | | int size = _readStream.readInt(); |
| | | 1931 | | if (size != Protocol.headerSize) |
| | | 1932 | | { |
| | | 1933 | | throw new MarshalException($"Received ValidateConnection message with unexpected size {size}."); |
| | | 1934 | | } |
| | | 1935 | | TraceUtil.traceRecv(_readStream, this, _logger, _traceLevels); |
| | | 1936 | | |
| | | 1937 | | // Client connection starts sending heartbeats once it's received the ValidateConnection message. |
| | | 1938 | | _idleTimeoutTransceiver?.scheduleHeartbeat(); |
| | | 1939 | | } |
| | | 1940 | | } |
| | | 1941 | | |
| | | 1942 | | _writeStream.resize(0); |
| | | 1943 | | _writeStream.pos(0); |
| | | 1944 | | |
| | | 1945 | | _readStream.resize(Protocol.headerSize); |
| | | 1946 | | _readStream.pos(0); |
| | | 1947 | | _readHeader = true; |
| | | 1948 | | |
| | | 1949 | | if (_instance.traceLevels().network >= 1) |
| | | 1950 | | { |
| | | 1951 | | var s = new StringBuilder(); |
| | | 1952 | | if (_endpoint.datagram()) |
| | | 1953 | | { |
| | | 1954 | | s.Append("starting to "); |
| | | 1955 | | s.Append(_connector is not null ? "send" : "receive"); |
| | | 1956 | | s.Append(' '); |
| | | 1957 | | s.Append(_endpoint.protocol()); |
| | | 1958 | | s.Append(" messages\n"); |
| | | 1959 | | s.Append(_transceiver.toDetailedString()); |
| | | 1960 | | } |
| | | 1961 | | else |
| | | 1962 | | { |
| | | 1963 | | s.Append(_connector is not null ? "established" : "accepted"); |
| | | 1964 | | s.Append(' '); |
| | | 1965 | | s.Append(_endpoint.protocol()); |
| | | 1966 | | s.Append(" connection\n"); |
| | | 1967 | | s.Append(ToString()); |
| | | 1968 | | } |
| | | 1969 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 1970 | | } |
| | | 1971 | | |
| | | 1972 | | return true; |
| | | 1973 | | } |
| | | 1974 | | |
| | | 1975 | | /// <summary> |
| | | 1976 | | /// Sends the next queued messages. This method is called by message() once the message which is being sent |
| | | 1977 | | /// (_sendStreams.First) is fully sent. Before sending the next message, this message is removed from _sendsStream |
| | | 1978 | | /// If any, its sent callback is also queued in given callback queue. |
| | | 1979 | | /// </summary> |
| | | 1980 | | /// <param name="callbacks">The sent callbacks to call for the messages that were sent.</param> |
| | | 1981 | | /// <returns>The socket operation to register with the thread pool's selector to send the remainder of the pending |
| | | 1982 | | /// message being sent (_sendStreams.First).</returns> |
| | | 1983 | | private int sendNextMessage(out Queue<OutgoingMessage> callbacks) |
| | | 1984 | | { |
| | | 1985 | | callbacks = null; |
| | | 1986 | | |
| | | 1987 | | if (_sendStreams.Count == 0) |
| | | 1988 | | { |
| | | 1989 | | // This can occur if no message was being written and the socket write operation was registered with the |
| | | 1990 | | // thread pool (a transceiver read method can request writing data). |
| | | 1991 | | return SocketOperation.None; |
| | | 1992 | | } |
| | | 1993 | | else if (_state == StateClosingPending && _writeStream.pos() == 0) |
| | | 1994 | | { |
| | | 1995 | | // Message wasn't sent, empty the _writeStream, we're not going to send more data because the connection |
| | | 1996 | | // is being closed. |
| | | 1997 | | OutgoingMessage message = _sendStreams.First.Value; |
| | | 1998 | | _writeStream.swap(message.stream); |
| | | 1999 | | return SocketOperation.None; |
| | | 2000 | | } |
| | | 2001 | | |
| | | 2002 | | // Assert that the message was fully written. |
| | | 2003 | | Debug.Assert(!_writeStream.isEmpty() && _writeStream.pos() == _writeStream.size()); |
| | | 2004 | | |
| | | 2005 | | try |
| | | 2006 | | { |
| | | 2007 | | while (true) |
| | | 2008 | | { |
| | | 2009 | | // |
| | | 2010 | | // The message that was being sent is sent. We can swap back the write stream buffer to the |
| | | 2011 | | // outgoing message (required for retry) and queue its sent callback (if any). |
| | | 2012 | | // |
| | | 2013 | | OutgoingMessage message = _sendStreams.First.Value; |
| | | 2014 | | _writeStream.swap(message.stream); |
| | | 2015 | | if (message.sent()) |
| | | 2016 | | { |
| | | 2017 | | callbacks ??= new Queue<OutgoingMessage>(); |
| | | 2018 | | callbacks.Enqueue(message); |
| | | 2019 | | } |
| | | 2020 | | _sendStreams.RemoveFirst(); |
| | | 2021 | | |
| | | 2022 | | // |
| | | 2023 | | // If there's nothing left to send, we're done. |
| | | 2024 | | // |
| | | 2025 | | if (_sendStreams.Count == 0) |
| | | 2026 | | { |
| | | 2027 | | break; |
| | | 2028 | | } |
| | | 2029 | | |
| | | 2030 | | // |
| | | 2031 | | // If we are in the closed state or if the close is pending, don't continue sending. This can occur if |
| | | 2032 | | // parseMessage (called before sendNextMessage by message()) closes the connection. |
| | | 2033 | | // |
| | | 2034 | | if (_state >= StateClosingPending) |
| | | 2035 | | { |
| | | 2036 | | return SocketOperation.None; |
| | | 2037 | | } |
| | | 2038 | | |
| | | 2039 | | // |
| | | 2040 | | // Otherwise, prepare the next message. |
| | | 2041 | | // |
| | | 2042 | | message = _sendStreams.First.Value; |
| | | 2043 | | Debug.Assert(!message.prepared); |
| | | 2044 | | OutputStream stream = message.stream; |
| | | 2045 | | |
| | | 2046 | | message.stream = doCompress(message.stream, message.compress); |
| | | 2047 | | message.stream.prepareWrite(); |
| | | 2048 | | message.prepared = true; |
| | | 2049 | | |
| | | 2050 | | TraceUtil.traceSend(stream, _instance, this, _logger, _traceLevels); |
| | | 2051 | | |
| | | 2052 | | // |
| | | 2053 | | // Send the message. |
| | | 2054 | | // |
| | | 2055 | | _writeStream.swap(message.stream); |
| | | 2056 | | if (_observer is not null) |
| | | 2057 | | { |
| | | 2058 | | observerStartWrite(_writeStream.getBuffer()); |
| | | 2059 | | } |
| | | 2060 | | if (_writeStream.pos() != _writeStream.size()) |
| | | 2061 | | { |
| | | 2062 | | int op = write(_writeStream.getBuffer()); |
| | | 2063 | | if (op != 0) |
| | | 2064 | | { |
| | | 2065 | | return op; |
| | | 2066 | | } |
| | | 2067 | | } |
| | | 2068 | | if (_observer is not null) |
| | | 2069 | | { |
| | | 2070 | | observerFinishWrite(_writeStream.getBuffer()); |
| | | 2071 | | } |
| | | 2072 | | |
| | | 2073 | | // If the message was sent right away, loop to send the next queued message. |
| | | 2074 | | } |
| | | 2075 | | |
| | | 2076 | | // Once the CloseConnection message is sent, we transition to the StateClosingPending state. |
| | | 2077 | | if (_state == StateClosing && _shutdownInitiated) |
| | | 2078 | | { |
| | | 2079 | | setState(StateClosingPending); |
| | | 2080 | | int op = _transceiver.closing(true, _exception); |
| | | 2081 | | if (op != 0) |
| | | 2082 | | { |
| | | 2083 | | return op; |
| | | 2084 | | } |
| | | 2085 | | } |
| | | 2086 | | } |
| | | 2087 | | catch (LocalException ex) |
| | | 2088 | | { |
| | | 2089 | | setState(StateClosed, ex); |
| | | 2090 | | } |
| | | 2091 | | return SocketOperation.None; |
| | | 2092 | | } |
| | | 2093 | | |
| | | 2094 | | /// <summary> |
| | | 2095 | | /// Sends or queues the given message. |
| | | 2096 | | /// </summary> |
| | | 2097 | | /// <param name="message">The message to send.</param> |
| | | 2098 | | /// <returns>The send status.</returns> |
| | | 2099 | | private int sendMessage(OutgoingMessage message) |
| | | 2100 | | { |
| | | 2101 | | Debug.Assert(_state >= StateActive); |
| | | 2102 | | Debug.Assert(_state < StateClosed); |
| | | 2103 | | |
| | | 2104 | | // Some messages are queued for sending. Just adds the message to the send queue and tell the caller that |
| | | 2105 | | // the message was queued. |
| | | 2106 | | if (_sendStreams.Count > 0) |
| | | 2107 | | { |
| | | 2108 | | _sendStreams.AddLast(message); |
| | | 2109 | | return OutgoingAsyncBase.AsyncStatusQueued; |
| | | 2110 | | } |
| | | 2111 | | |
| | | 2112 | | // Prepare the message for sending. |
| | | 2113 | | Debug.Assert(!message.prepared); |
| | | 2114 | | |
| | | 2115 | | OutputStream stream = message.stream; |
| | | 2116 | | |
| | | 2117 | | message.stream = doCompress(stream, message.compress); |
| | | 2118 | | message.stream.prepareWrite(); |
| | | 2119 | | message.prepared = true; |
| | | 2120 | | |
| | | 2121 | | TraceUtil.traceSend(stream, _instance, this, _logger, _traceLevels); |
| | | 2122 | | |
| | | 2123 | | // Send the message without blocking. |
| | | 2124 | | if (_observer is not null) |
| | | 2125 | | { |
| | | 2126 | | observerStartWrite(message.stream.getBuffer()); |
| | | 2127 | | } |
| | | 2128 | | int op = write(message.stream.getBuffer()); |
| | | 2129 | | if (op == 0) |
| | | 2130 | | { |
| | | 2131 | | // The message was sent so we're done. |
| | | 2132 | | |
| | | 2133 | | if (_observer is not null) |
| | | 2134 | | { |
| | | 2135 | | observerFinishWrite(message.stream.getBuffer()); |
| | | 2136 | | } |
| | | 2137 | | |
| | | 2138 | | int status = OutgoingAsyncBase.AsyncStatusSent; |
| | | 2139 | | if (message.sent()) |
| | | 2140 | | { |
| | | 2141 | | // If there's a sent callback, indicate the caller that it should invoke the sent callback. |
| | | 2142 | | status |= OutgoingAsyncBase.AsyncStatusInvokeSentCallback; |
| | | 2143 | | } |
| | | 2144 | | |
| | | 2145 | | return status; |
| | | 2146 | | } |
| | | 2147 | | |
| | | 2148 | | // The message couldn't be sent right away so we add it to the send stream queue (which is empty) and swap its |
| | | 2149 | | // stream with `_writeStream`. The socket operation returned by the transceiver write is registered with the |
| | | 2150 | | // thread pool. At this point the message() method will take care of sending the whole message (held by |
| | | 2151 | | // _writeStream) when the transceiver is ready to write more of the message buffer. |
| | | 2152 | | |
| | | 2153 | | _writeStream.swap(message.stream); |
| | | 2154 | | _sendStreams.AddLast(message); |
| | | 2155 | | _threadPool.register(this, op); |
| | | 2156 | | return OutgoingAsyncBase.AsyncStatusQueued; |
| | | 2157 | | } |
| | | 2158 | | |
| | | 2159 | | private OutputStream doCompress(OutputStream decompressed, bool compress) |
| | | 2160 | | { |
| | | 2161 | | if (BZip2.isLoaded(_logger) && compress && decompressed.size() >= 100) |
| | | 2162 | | { |
| | | 2163 | | // |
| | | 2164 | | // Do compression. |
| | | 2165 | | // |
| | | 2166 | | Ice.Internal.Buffer cbuf = BZip2.compress( |
| | | 2167 | | decompressed.getBuffer(), |
| | | 2168 | | Protocol.headerSize, |
| | | 2169 | | _compressionLevel); |
| | | 2170 | | if (cbuf is not null) |
| | | 2171 | | { |
| | | 2172 | | var cstream = new OutputStream(new Internal.Buffer(cbuf, true), decompressed.getEncoding()); |
| | | 2173 | | |
| | | 2174 | | // |
| | | 2175 | | // Set compression status. |
| | | 2176 | | // |
| | | 2177 | | cstream.pos(9); |
| | | 2178 | | cstream.writeByte(2); |
| | | 2179 | | |
| | | 2180 | | // |
| | | 2181 | | // Write the size of the compressed stream into the header. |
| | | 2182 | | // |
| | | 2183 | | cstream.pos(10); |
| | | 2184 | | cstream.writeInt(cstream.size()); |
| | | 2185 | | |
| | | 2186 | | // |
| | | 2187 | | // Write the compression status and size of the compressed stream into the header of the |
| | | 2188 | | // decompressed stream -- we need this to trace requests correctly. |
| | | 2189 | | // |
| | | 2190 | | decompressed.pos(9); |
| | | 2191 | | decompressed.writeByte(2); |
| | | 2192 | | decompressed.writeInt(cstream.size()); |
| | | 2193 | | |
| | | 2194 | | return cstream; |
| | | 2195 | | } |
| | | 2196 | | } |
| | | 2197 | | |
| | | 2198 | | // Write the compression status. If BZip2 is loaded and compress is set to true, we write 1, to request a |
| | | 2199 | | // compressed reply. Otherwise, we write 0 either BZip2 is not loaded or we are sending an uncompressed reply. |
| | | 2200 | | decompressed.pos(9); |
| | | 2201 | | decompressed.writeByte((byte)((BZip2.isLoaded(_logger) && compress) ? 1 : 0)); |
| | | 2202 | | |
| | | 2203 | | // |
| | | 2204 | | // Not compressed, fill in the message size. |
| | | 2205 | | // |
| | | 2206 | | decompressed.pos(10); |
| | | 2207 | | decompressed.writeInt(decompressed.size()); |
| | | 2208 | | |
| | | 2209 | | return decompressed; |
| | | 2210 | | } |
| | | 2211 | | |
| | | 2212 | | private struct MessageInfo |
| | | 2213 | | { |
| | | 2214 | | public InputStream stream; |
| | | 2215 | | public int requestCount; |
| | | 2216 | | public int requestId; |
| | | 2217 | | public byte compress; |
| | | 2218 | | public ObjectAdapter adapter; |
| | | 2219 | | public OutgoingAsyncBase outAsync; |
| | | 2220 | | public int upcallCount; |
| | | 2221 | | } |
| | | 2222 | | |
| | | 2223 | | private int parseMessage(ref MessageInfo info) |
| | | 2224 | | { |
| | | 2225 | | Debug.Assert(_state > StateNotValidated && _state < StateClosed); |
| | | 2226 | | |
| | | 2227 | | info.stream = new InputStream(_instance, Protocol.currentProtocolEncoding); |
| | | 2228 | | _readStream.swap(info.stream); |
| | | 2229 | | _readStream.resize(Protocol.headerSize); |
| | | 2230 | | _readStream.pos(0); |
| | | 2231 | | _readHeader = true; |
| | | 2232 | | |
| | | 2233 | | Debug.Assert(info.stream.pos() == info.stream.size()); |
| | | 2234 | | |
| | | 2235 | | try |
| | | 2236 | | { |
| | | 2237 | | // |
| | | 2238 | | // The magic and version fields have already been checked. |
| | | 2239 | | // |
| | | 2240 | | info.stream.pos(8); |
| | | 2241 | | byte messageType = info.stream.readByte(); |
| | | 2242 | | info.compress = info.stream.readByte(); |
| | | 2243 | | if (info.compress == 2) |
| | | 2244 | | { |
| | | 2245 | | if (BZip2.isLoaded(_logger)) |
| | | 2246 | | { |
| | | 2247 | | Ice.Internal.Buffer ubuf = BZip2.decompress( |
| | | 2248 | | info.stream.getBuffer(), |
| | | 2249 | | Protocol.headerSize, |
| | | 2250 | | _messageSizeMax); |
| | | 2251 | | info.stream = new InputStream(info.stream.instance(), info.stream.getEncoding(), ubuf, true); |
| | | 2252 | | } |
| | | 2253 | | else |
| | | 2254 | | { |
| | | 2255 | | throw new FeatureNotSupportedException( |
| | | 2256 | | "Cannot decompress compressed message: BZip2 library is not loaded."); |
| | | 2257 | | } |
| | | 2258 | | } |
| | | 2259 | | info.stream.pos(Protocol.headerSize); |
| | | 2260 | | |
| | | 2261 | | switch (messageType) |
| | | 2262 | | { |
| | | 2263 | | case Protocol.closeConnectionMsg: |
| | | 2264 | | { |
| | | 2265 | | TraceUtil.traceRecv(info.stream, this, _logger, _traceLevels); |
| | | 2266 | | if (_endpoint.datagram()) |
| | | 2267 | | { |
| | | 2268 | | if (_warn) |
| | | 2269 | | { |
| | | 2270 | | _logger.warning("ignoring close connection message for datagram connection:\n" + _desc); |
| | | 2271 | | } |
| | | 2272 | | } |
| | | 2273 | | else |
| | | 2274 | | { |
| | | 2275 | | setState(StateClosingPending, new CloseConnectionException()); |
| | | 2276 | | |
| | | 2277 | | // |
| | | 2278 | | // Notify the transceiver of the graceful connection closure. |
| | | 2279 | | // |
| | | 2280 | | int op = _transceiver.closing(false, _exception); |
| | | 2281 | | if (op != 0) |
| | | 2282 | | { |
| | | 2283 | | scheduleCloseTimer(); |
| | | 2284 | | return op; |
| | | 2285 | | } |
| | | 2286 | | setState(StateClosed); |
| | | 2287 | | } |
| | | 2288 | | break; |
| | | 2289 | | } |
| | | 2290 | | |
| | | 2291 | | case Protocol.requestMsg: |
| | | 2292 | | { |
| | | 2293 | | if (_state >= StateClosing) |
| | | 2294 | | { |
| | | 2295 | | TraceUtil.trace( |
| | | 2296 | | "received request during closing\n(ignored by server, client will retry)", |
| | | 2297 | | info.stream, |
| | | 2298 | | this, |
| | | 2299 | | _logger, |
| | | 2300 | | _traceLevels); |
| | | 2301 | | } |
| | | 2302 | | else |
| | | 2303 | | { |
| | | 2304 | | TraceUtil.traceRecv(info.stream, this, _logger, _traceLevels); |
| | | 2305 | | info.requestId = info.stream.readInt(); |
| | | 2306 | | info.requestCount = 1; |
| | | 2307 | | info.adapter = _adapter; |
| | | 2308 | | ++info.upcallCount; |
| | | 2309 | | |
| | | 2310 | | cancelInactivityTimer(); |
| | | 2311 | | ++_dispatchCount; |
| | | 2312 | | } |
| | | 2313 | | break; |
| | | 2314 | | } |
| | | 2315 | | |
| | | 2316 | | case Protocol.requestBatchMsg: |
| | | 2317 | | { |
| | | 2318 | | if (_state >= StateClosing) |
| | | 2319 | | { |
| | | 2320 | | TraceUtil.trace( |
| | | 2321 | | "received batch request during closing\n(ignored by server, client will retry)", |
| | | 2322 | | info.stream, |
| | | 2323 | | this, |
| | | 2324 | | _logger, |
| | | 2325 | | _traceLevels); |
| | | 2326 | | } |
| | | 2327 | | else |
| | | 2328 | | { |
| | | 2329 | | TraceUtil.traceRecv(info.stream, this, _logger, _traceLevels); |
| | | 2330 | | int requestCount = info.stream.readInt(); |
| | | 2331 | | if (requestCount < 0) |
| | | 2332 | | { |
| | | 2333 | | throw new MarshalException($"Received batch request with {requestCount} batches."); |
| | | 2334 | | } |
| | | 2335 | | info.requestCount = requestCount; |
| | | 2336 | | info.adapter = _adapter; |
| | | 2337 | | info.upcallCount += info.requestCount; |
| | | 2338 | | |
| | | 2339 | | cancelInactivityTimer(); |
| | | 2340 | | _dispatchCount += info.requestCount; |
| | | 2341 | | } |
| | | 2342 | | break; |
| | | 2343 | | } |
| | | 2344 | | |
| | | 2345 | | case Protocol.replyMsg: |
| | | 2346 | | { |
| | | 2347 | | TraceUtil.traceRecv(info.stream, this, _logger, _traceLevels); |
| | | 2348 | | info.requestId = info.stream.readInt(); |
| | | 2349 | | if (_asyncRequests.TryGetValue(info.requestId, out info.outAsync)) |
| | | 2350 | | { |
| | | 2351 | | _asyncRequests.Remove(info.requestId); |
| | | 2352 | | |
| | | 2353 | | info.outAsync.getIs().swap(info.stream); |
| | | 2354 | | |
| | | 2355 | | // |
| | | 2356 | | // If we just received the reply for a request which isn't acknowledge as |
| | | 2357 | | // sent yet, we queue the reply instead of processing it right away. It |
| | | 2358 | | // will be processed once the write callback is invoked for the message. |
| | | 2359 | | // |
| | | 2360 | | OutgoingMessage message = _sendStreams.Count > 0 ? _sendStreams.First.Value : null; |
| | | 2361 | | if (message is not null && message.outAsync == info.outAsync) |
| | | 2362 | | { |
| | | 2363 | | message.receivedReply = true; |
| | | 2364 | | } |
| | | 2365 | | else if (info.outAsync.response()) |
| | | 2366 | | { |
| | | 2367 | | ++info.upcallCount; |
| | | 2368 | | } |
| | | 2369 | | else |
| | | 2370 | | { |
| | | 2371 | | info.outAsync = null; |
| | | 2372 | | } |
| | | 2373 | | if (_closeRequested && _state < StateClosing && _asyncRequests.Count == 0) |
| | | 2374 | | { |
| | | 2375 | | doApplicationClose(); |
| | | 2376 | | } |
| | | 2377 | | } |
| | | 2378 | | break; |
| | | 2379 | | } |
| | | 2380 | | |
| | | 2381 | | case Protocol.validateConnectionMsg: |
| | | 2382 | | { |
| | | 2383 | | TraceUtil.traceRecv(info.stream, this, _logger, _traceLevels); |
| | | 2384 | | break; |
| | | 2385 | | } |
| | | 2386 | | |
| | | 2387 | | default: |
| | | 2388 | | { |
| | | 2389 | | TraceUtil.trace( |
| | | 2390 | | "received unknown message\n(invalid, closing connection)", |
| | | 2391 | | info.stream, |
| | | 2392 | | this, |
| | | 2393 | | _logger, |
| | | 2394 | | _traceLevels); |
| | | 2395 | | |
| | | 2396 | | throw new ProtocolException($"Received Ice protocol message with unknown type: {messageType}"); |
| | | 2397 | | } |
| | | 2398 | | } |
| | | 2399 | | } |
| | | 2400 | | catch (LocalException ex) |
| | | 2401 | | { |
| | | 2402 | | if (_endpoint.datagram()) |
| | | 2403 | | { |
| | | 2404 | | if (_warn) |
| | | 2405 | | { |
| | | 2406 | | _logger.warning("datagram connection exception:\n" + ex.ToString() + "\n" + _desc); |
| | | 2407 | | } |
| | | 2408 | | } |
| | | 2409 | | else |
| | | 2410 | | { |
| | | 2411 | | setState(StateClosed, ex); |
| | | 2412 | | } |
| | | 2413 | | } |
| | | 2414 | | |
| | | 2415 | | if (_state == StateHolding) |
| | | 2416 | | { |
| | | 2417 | | // Don't continue reading if the connection is in the holding state. |
| | | 2418 | | return SocketOperation.None; |
| | | 2419 | | } |
| | | 2420 | | else if (_maxDispatches > 0 && _dispatchCount >= _maxDispatches) |
| | | 2421 | | { |
| | | 2422 | | // Don't continue reading if the _maxDispatches limit is reached or exceeded. |
| | | 2423 | | _idleTimeoutTransceiver?.disableIdleCheck(); |
| | | 2424 | | return SocketOperation.None; |
| | | 2425 | | } |
| | | 2426 | | else |
| | | 2427 | | { |
| | | 2428 | | // Continue reading. |
| | | 2429 | | return SocketOperation.Read; |
| | | 2430 | | } |
| | | 2431 | | } |
| | | 2432 | | |
| | | 2433 | | private void dispatchAll( |
| | | 2434 | | InputStream stream, |
| | | 2435 | | int requestCount, |
| | | 2436 | | int requestId, |
| | | 2437 | | byte compress, |
| | | 2438 | | ObjectAdapter adapter) |
| | | 2439 | | { |
| | | 2440 | | // Note: In contrast to other private or protected methods, this method must be called *without* the mutex |
| | | 2441 | | // locked. |
| | | 2442 | | |
| | | 2443 | | Object dispatcher = adapter?.dispatchPipeline; |
| | | 2444 | | |
| | | 2445 | | try |
| | | 2446 | | { |
| | | 2447 | | while (requestCount > 0) |
| | | 2448 | | { |
| | | 2449 | | // adapter can be null here, however the adapter set in current can't be null, and we never pass |
| | | 2450 | | // a null current.adapter to the application code. Once this file enables nullable, adapter should be |
| | | 2451 | | // adapter! below. |
| | | 2452 | | var request = new IncomingRequest(requestId, this, adapter, stream); |
| | | 2453 | | |
| | | 2454 | | if (dispatcher is not null) |
| | | 2455 | | { |
| | | 2456 | | // We don't and can't await the dispatchAsync: with batch requests, we want all the dispatches to |
| | | 2457 | | // execute in the current Ice thread pool thread. If we awaited the dispatchAsync, we could |
| | | 2458 | | // switch to a .NET thread pool thread. |
| | | 2459 | | _ = dispatchAsync(request); |
| | | 2460 | | } |
| | | 2461 | | else |
| | | 2462 | | { |
| | | 2463 | | // Received request on a connection without an object adapter. |
| | | 2464 | | sendResponse( |
| | | 2465 | | request.current.createOutgoingResponse(new ObjectNotExistException()), |
| | | 2466 | | isTwoWay: !_endpoint.datagram() && requestId != 0, |
| | | 2467 | | compress: 0); |
| | | 2468 | | } |
| | | 2469 | | --requestCount; |
| | | 2470 | | } |
| | | 2471 | | |
| | | 2472 | | stream.clear(); |
| | | 2473 | | } |
| | | 2474 | | catch (LocalException ex) // TODO: catch all exceptions |
| | | 2475 | | { |
| | | 2476 | | // Typically, the IncomingRequest constructor throws an exception, and we can't continue. |
| | | 2477 | | dispatchException(ex, requestCount); |
| | | 2478 | | } |
| | | 2479 | | |
| | | 2480 | | async Task dispatchAsync(IncomingRequest request) |
| | | 2481 | | { |
| | | 2482 | | try |
| | | 2483 | | { |
| | | 2484 | | OutgoingResponse response; |
| | | 2485 | | |
| | | 2486 | | try |
| | | 2487 | | { |
| | | 2488 | | response = await dispatcher.dispatchAsync(request).ConfigureAwait(false); |
| | | 2489 | | } |
| | | 2490 | | catch (System.Exception ex) |
| | | 2491 | | { |
| | | 2492 | | response = request.current.createOutgoingResponse(ex); |
| | | 2493 | | } |
| | | 2494 | | |
| | | 2495 | | sendResponse(response, isTwoWay: !_endpoint.datagram() && requestId != 0, compress); |
| | | 2496 | | } |
| | | 2497 | | catch (LocalException ex) // TODO: catch all exceptions to avoid UnobservedTaskException |
| | | 2498 | | { |
| | | 2499 | | dispatchException(ex, requestCount: 1); |
| | | 2500 | | } |
| | | 2501 | | } |
| | | 2502 | | } |
| | | 2503 | | |
| | | 2504 | | private void sendResponse(OutgoingResponse response, bool isTwoWay, byte compress) |
| | | 2505 | | { |
| | | 2506 | | bool finished = false; |
| | | 2507 | | try |
| | | 2508 | | { |
| | | 2509 | | lock (_mutex) |
| | | 2510 | | { |
| | | 2511 | | Debug.Assert(_state > StateNotValidated); |
| | | 2512 | | |
| | | 2513 | | try |
| | | 2514 | | { |
| | | 2515 | | if (--_upcallCount == 0) |
| | | 2516 | | { |
| | | 2517 | | if (_state == StateFinished) |
| | | 2518 | | { |
| | | 2519 | | finished = true; |
| | | 2520 | | _observer?.detach(); |
| | | 2521 | | } |
| | | 2522 | | Monitor.PulseAll(_mutex); |
| | | 2523 | | } |
| | | 2524 | | |
| | | 2525 | | if (_state >= StateClosed) |
| | | 2526 | | { |
| | | 2527 | | Debug.Assert(_exception is not null); |
| | | 2528 | | throw _exception; |
| | | 2529 | | } |
| | | 2530 | | |
| | | 2531 | | if (isTwoWay) |
| | | 2532 | | { |
| | | 2533 | | sendMessage(new OutgoingMessage(response.outputStream, compress > 0)); |
| | | 2534 | | } |
| | | 2535 | | |
| | | 2536 | | if (_state == StateActive && _maxDispatches > 0 && _dispatchCount == _maxDispatches) |
| | | 2537 | | { |
| | | 2538 | | // Resume reading if the connection is active and the dispatch count is about to be less than |
| | | 2539 | | // _maxDispatches. |
| | | 2540 | | _threadPool.update(this, SocketOperation.None, SocketOperation.Read); |
| | | 2541 | | _idleTimeoutTransceiver?.enableIdleCheck(); |
| | | 2542 | | } |
| | | 2543 | | |
| | | 2544 | | --_dispatchCount; |
| | | 2545 | | |
| | | 2546 | | if (_state == StateClosing && _upcallCount == 0) |
| | | 2547 | | { |
| | | 2548 | | initiateShutdown(); |
| | | 2549 | | } |
| | | 2550 | | } |
| | | 2551 | | catch (LocalException ex) |
| | | 2552 | | { |
| | | 2553 | | setState(StateClosed, ex); |
| | | 2554 | | } |
| | | 2555 | | } |
| | | 2556 | | } |
| | | 2557 | | finally |
| | | 2558 | | { |
| | | 2559 | | if (finished && _removeFromFactory is not null) |
| | | 2560 | | { |
| | | 2561 | | _removeFromFactory(this); |
| | | 2562 | | } |
| | | 2563 | | } |
| | | 2564 | | } |
| | | 2565 | | |
| | | 2566 | | private void dispatchException(LocalException ex, int requestCount) |
| | | 2567 | | { |
| | | 2568 | | bool finished = false; |
| | | 2569 | | |
| | | 2570 | | // Fatal exception while dispatching a request. Since sendResponse isn't called in case of a fatal exception |
| | | 2571 | | // we decrement _upcallCount here. |
| | | 2572 | | lock (_mutex) |
| | | 2573 | | { |
| | | 2574 | | setState(StateClosed, ex); |
| | | 2575 | | |
| | | 2576 | | if (requestCount > 0) |
| | | 2577 | | { |
| | | 2578 | | Debug.Assert(_upcallCount >= requestCount); |
| | | 2579 | | _upcallCount -= requestCount; |
| | | 2580 | | if (_upcallCount == 0) |
| | | 2581 | | { |
| | | 2582 | | if (_state == StateFinished) |
| | | 2583 | | { |
| | | 2584 | | finished = true; |
| | | 2585 | | _observer?.detach(); |
| | | 2586 | | } |
| | | 2587 | | Monitor.PulseAll(_mutex); |
| | | 2588 | | } |
| | | 2589 | | } |
| | | 2590 | | } |
| | | 2591 | | |
| | | 2592 | | if (finished && _removeFromFactory is not null) |
| | | 2593 | | { |
| | | 2594 | | _removeFromFactory(this); |
| | | 2595 | | } |
| | | 2596 | | } |
| | | 2597 | | |
| | | 2598 | | private void inactivityCheck(System.Threading.Timer inactivityTimer) |
| | | 2599 | | { |
| | | 2600 | | lock (_mutex) |
| | | 2601 | | { |
| | | 2602 | | // If the timers are different, it means this inactivityTimer is no longer current. |
| | | 2603 | | if (inactivityTimer == _inactivityTimer) |
| | | 2604 | | { |
| | | 2605 | | _inactivityTimer = null; |
| | | 2606 | | inactivityTimer.Dispose(); // non-blocking |
| | | 2607 | | |
| | | 2608 | | if (_state == StateActive) |
| | | 2609 | | { |
| | | 2610 | | setState( |
| | | 2611 | | StateClosing, |
| | | 2612 | | new ConnectionClosedException( |
| | | 2613 | | "Connection closed because it remained inactive for longer than the inactivity timeout.", |
| | | 2614 | | closedByApplication: false)); |
| | | 2615 | | } |
| | | 2616 | | } |
| | | 2617 | | // Else this timer was already canceled and disposed. Nothing to do. |
| | | 2618 | | } |
| | | 2619 | | } |
| | | 2620 | | |
| | | 2621 | | private void connectTimedOut(System.Threading.Timer connectTimer) |
| | | 2622 | | { |
| | | 2623 | | lock (_mutex) |
| | | 2624 | | { |
| | | 2625 | | if (_state < StateActive) |
| | | 2626 | | { |
| | | 2627 | | setState(StateClosed, new ConnectTimeoutException()); |
| | | 2628 | | } |
| | | 2629 | | } |
| | | 2630 | | // else ignore since we're already connected. |
| | | 2631 | | connectTimer.Dispose(); |
| | | 2632 | | } |
| | | 2633 | | |
| | | 2634 | | private void closeTimedOut(System.Threading.Timer closeTimer) |
| | | 2635 | | { |
| | | 2636 | | lock (_mutex) |
| | | 2637 | | { |
| | | 2638 | | if (_state < StateClosed) |
| | | 2639 | | { |
| | | 2640 | | // We don't use setState(state, exception) because we want to overwrite the exception set by a |
| | | 2641 | | // graceful closure. |
| | | 2642 | | _exception = new CloseTimeoutException(); |
| | | 2643 | | setState(StateClosed); |
| | | 2644 | | } |
| | | 2645 | | } |
| | | 2646 | | // else ignore since we're already closed. |
| | | 2647 | | closeTimer.Dispose(); |
| | | 2648 | | } |
| | | 2649 | | |
| | | 2650 | | private ConnectionInfo initConnectionInfo() |
| | | 2651 | | { |
| | | 2652 | | // Called with _mutex locked. |
| | | 2653 | | |
| | | 2654 | | if (_state > StateNotInitialized && _info is not null) // Update the connection info until it's initialized |
| | | 2655 | | { |
| | | 2656 | | return _info; |
| | | 2657 | | } |
| | | 2658 | | |
| | | 2659 | | _info = |
| | | 2660 | | _transceiver.getInfo(incoming: _connector is null, _adapter?.getName() ?? "", _endpoint.connectionId()); |
| | | 2661 | | return _info; |
| | | 2662 | | } |
| | | 2663 | | |
| | | 2664 | | private void warning(string msg, System.Exception ex) => _logger.warning($"{msg}:\n{ex}\n{_transceiver}"); |
| | | 2665 | | |
| | | 2666 | | private void observerStartRead(Ice.Internal.Buffer buf) |
| | | 2667 | | { |
| | | 2668 | | if (_readStreamPos >= 0) |
| | | 2669 | | { |
| | | 2670 | | Debug.Assert(!buf.empty()); |
| | | 2671 | | _observer.receivedBytes(buf.b.position() - _readStreamPos); |
| | | 2672 | | } |
| | | 2673 | | _readStreamPos = buf.empty() ? -1 : buf.b.position(); |
| | | 2674 | | } |
| | | 2675 | | |
| | | 2676 | | private void observerFinishRead(Ice.Internal.Buffer buf) |
| | | 2677 | | { |
| | | 2678 | | if (_readStreamPos == -1) |
| | | 2679 | | { |
| | | 2680 | | return; |
| | | 2681 | | } |
| | | 2682 | | Debug.Assert(buf.b.position() >= _readStreamPos); |
| | | 2683 | | _observer.receivedBytes(buf.b.position() - _readStreamPos); |
| | | 2684 | | _readStreamPos = -1; |
| | | 2685 | | } |
| | | 2686 | | |
| | | 2687 | | private void observerStartWrite(Ice.Internal.Buffer buf) |
| | | 2688 | | { |
| | | 2689 | | if (_writeStreamPos >= 0) |
| | | 2690 | | { |
| | | 2691 | | Debug.Assert(!buf.empty()); |
| | | 2692 | | _observer.sentBytes(buf.b.position() - _writeStreamPos); |
| | | 2693 | | } |
| | | 2694 | | _writeStreamPos = buf.empty() ? -1 : buf.b.position(); |
| | | 2695 | | } |
| | | 2696 | | |
| | | 2697 | | private void observerFinishWrite(Ice.Internal.Buffer buf) |
| | | 2698 | | { |
| | | 2699 | | if (_writeStreamPos == -1) |
| | | 2700 | | { |
| | | 2701 | | return; |
| | | 2702 | | } |
| | | 2703 | | if (buf.b.position() > _writeStreamPos) |
| | | 2704 | | { |
| | | 2705 | | _observer.sentBytes(buf.b.position() - _writeStreamPos); |
| | | 2706 | | } |
| | | 2707 | | _writeStreamPos = -1; |
| | | 2708 | | } |
| | | 2709 | | |
| | | 2710 | | private int read(Ice.Internal.Buffer buf) |
| | | 2711 | | { |
| | | 2712 | | int start = buf.b.position(); |
| | | 2713 | | int op = _transceiver.read(buf, ref _hasMoreData); |
| | | 2714 | | if (_instance.traceLevels().network >= 3 && buf.b.position() != start) |
| | | 2715 | | { |
| | | 2716 | | var s = new StringBuilder("received "); |
| | | 2717 | | if (_endpoint.datagram()) |
| | | 2718 | | { |
| | | 2719 | | s.Append(buf.b.limit()); |
| | | 2720 | | } |
| | | 2721 | | else |
| | | 2722 | | { |
| | | 2723 | | s.Append(buf.b.position() - start); |
| | | 2724 | | s.Append(" of "); |
| | | 2725 | | s.Append(buf.b.limit() - start); |
| | | 2726 | | } |
| | | 2727 | | s.Append(" bytes via "); |
| | | 2728 | | s.Append(_endpoint.protocol()); |
| | | 2729 | | s.Append('\n'); |
| | | 2730 | | s.Append(ToString()); |
| | | 2731 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 2732 | | } |
| | | 2733 | | return op; |
| | | 2734 | | } |
| | | 2735 | | |
| | | 2736 | | private int write(Ice.Internal.Buffer buf) |
| | | 2737 | | { |
| | | 2738 | | int start = buf.b.position(); |
| | | 2739 | | int op = _transceiver.write(buf); |
| | | 2740 | | if (_instance.traceLevels().network >= 3 && buf.b.position() != start) |
| | | 2741 | | { |
| | | 2742 | | var s = new StringBuilder("sent "); |
| | | 2743 | | s.Append(buf.b.position() - start); |
| | | 2744 | | if (!_endpoint.datagram()) |
| | | 2745 | | { |
| | | 2746 | | s.Append(" of "); |
| | | 2747 | | s.Append(buf.b.limit() - start); |
| | | 2748 | | } |
| | | 2749 | | s.Append(" bytes via "); |
| | | 2750 | | s.Append(_endpoint.protocol()); |
| | | 2751 | | s.Append('\n'); |
| | | 2752 | | s.Append(ToString()); |
| | | 2753 | | _instance.initializationData().logger.trace(_instance.traceLevels().networkCat, s.ToString()); |
| | | 2754 | | } |
| | | 2755 | | return op; |
| | | 2756 | | } |
| | | 2757 | | |
| | | 2758 | | private void scheduleInactivityTimer() |
| | | 2759 | | { |
| | | 2760 | | // Called with the ConnectionI mutex locked. |
| | | 2761 | | Debug.Assert(_inactivityTimer is null); |
| | | 2762 | | Debug.Assert(_inactivityTimeout > TimeSpan.Zero); |
| | | 2763 | | |
| | | 2764 | | _inactivityTimer = new System.Threading.Timer( |
| | | 2765 | | inactivityTimer => inactivityCheck((System.Threading.Timer)inactivityTimer)); |
| | | 2766 | | _inactivityTimer.Change(_inactivityTimeout, Timeout.InfiniteTimeSpan); |
| | | 2767 | | } |
| | | 2768 | | |
| | | 2769 | | private void cancelInactivityTimer() |
| | | 2770 | | { |
| | | 2771 | | // Called with the ConnectionI mutex locked. |
| | | 2772 | | if (_inactivityTimer is not null) |
| | | 2773 | | { |
| | | 2774 | | _inactivityTimer.Change(Timeout.InfiniteTimeSpan, Timeout.InfiniteTimeSpan); |
| | | 2775 | | _inactivityTimer.Dispose(); |
| | | 2776 | | _inactivityTimer = null; |
| | | 2777 | | } |
| | | 2778 | | } |
| | | 2779 | | |
| | | 2780 | | private void scheduleCloseTimer() |
| | | 2781 | | { |
| | | 2782 | | if (_closeTimeout > TimeSpan.Zero) |
| | | 2783 | | { |
| | | 2784 | | #pragma warning disable CA2000 // closeTimer is disposed by closeTimedOut. |
| | | 2785 | | var closeTimer = new System.Threading.Timer( |
| | | 2786 | | timerObj => closeTimedOut((System.Threading.Timer)timerObj)); |
| | | 2787 | | // schedule timer to run once; closeTimedOut disposes the timer too. |
| | | 2788 | | closeTimer.Change(_closeTimeout, Timeout.InfiniteTimeSpan); |
| | | 2789 | | #pragma warning restore CA2000 |
| | | 2790 | | } |
| | | 2791 | | } |
| | | 2792 | | |
| | | 2793 | | private void doApplicationClose() |
| | | 2794 | | { |
| | | 2795 | | // Called with the ConnectionI mutex locked. |
| | | 2796 | | Debug.Assert(_state < StateClosing); |
| | | 2797 | | setState( |
| | | 2798 | | StateClosing, |
| | | 2799 | | new ConnectionClosedException( |
| | | 2800 | | "The connection was closed gracefully by the application.", |
| | | 2801 | | closedByApplication: true)); |
| | | 2802 | | } |
| | | 2803 | | |
| | | 2804 | | private class OutgoingMessage |
| | | 2805 | | { |
| | 1 | 2806 | | internal OutgoingMessage(OutputStream stream, bool compress) |
| | | 2807 | | { |
| | 1 | 2808 | | this.stream = stream; |
| | 1 | 2809 | | this.compress = compress; |
| | 1 | 2810 | | } |
| | | 2811 | | |
| | 1 | 2812 | | internal OutgoingMessage(OutgoingAsyncBase outAsync, OutputStream stream, bool compress, int requestId) |
| | | 2813 | | { |
| | 1 | 2814 | | this.outAsync = outAsync; |
| | 1 | 2815 | | this.stream = stream; |
| | 1 | 2816 | | this.compress = compress; |
| | 1 | 2817 | | this.requestId = requestId; |
| | 1 | 2818 | | } |
| | | 2819 | | |
| | | 2820 | | internal void canceled() |
| | | 2821 | | { |
| | | 2822 | | Debug.Assert(outAsync is not null); // Only requests can timeout. |
| | 1 | 2823 | | outAsync = null; |
| | 1 | 2824 | | } |
| | | 2825 | | |
| | | 2826 | | internal bool sent() |
| | | 2827 | | { |
| | 1 | 2828 | | stream = null; |
| | 1 | 2829 | | if (outAsync is not null) |
| | | 2830 | | { |
| | 1 | 2831 | | invokeSent = outAsync.sent(); |
| | 1 | 2832 | | return invokeSent || receivedReply; |
| | | 2833 | | } |
| | 1 | 2834 | | return false; |
| | | 2835 | | } |
| | | 2836 | | |
| | | 2837 | | internal void completed(LocalException ex) |
| | | 2838 | | { |
| | 1 | 2839 | | if (outAsync is not null) |
| | | 2840 | | { |
| | 1 | 2841 | | if (outAsync.exception(ex)) |
| | | 2842 | | { |
| | 1 | 2843 | | outAsync.invokeException(); |
| | | 2844 | | } |
| | | 2845 | | } |
| | 1 | 2846 | | stream = null; |
| | 1 | 2847 | | } |
| | | 2848 | | |
| | | 2849 | | internal OutputStream stream; |
| | | 2850 | | internal OutgoingAsyncBase outAsync; |
| | | 2851 | | internal bool compress; |
| | | 2852 | | internal int requestId; |
| | | 2853 | | internal bool prepared; |
| | | 2854 | | internal bool isSent; |
| | | 2855 | | internal bool invokeSent; |
| | | 2856 | | internal bool receivedReply; |
| | | 2857 | | } |
| | | 2858 | | |
| | | 2859 | | private static readonly ConnectionState[] connectionStateMap = [ |
| | | 2860 | | ConnectionState.ConnectionStateValidating, // StateNotInitialized |
| | | 2861 | | ConnectionState.ConnectionStateValidating, // StateNotValidated |
| | | 2862 | | ConnectionState.ConnectionStateActive, // StateActive |
| | | 2863 | | ConnectionState.ConnectionStateHolding, // StateHolding |
| | | 2864 | | ConnectionState.ConnectionStateClosing, // StateClosing |
| | | 2865 | | ConnectionState.ConnectionStateClosing, // StateClosingPending |
| | | 2866 | | ConnectionState.ConnectionStateClosed, // StateClosed |
| | | 2867 | | ConnectionState.ConnectionStateClosed, // StateFinished |
| | | 2868 | | ]; |
| | | 2869 | | |
| | | 2870 | | private readonly Instance _instance; |
| | | 2871 | | private readonly Transceiver _transceiver; |
| | | 2872 | | private readonly IdleTimeoutTransceiverDecorator _idleTimeoutTransceiver; // can be null |
| | | 2873 | | |
| | | 2874 | | private string _desc; |
| | | 2875 | | private readonly string _type; |
| | | 2876 | | private readonly Connector _connector; |
| | | 2877 | | private readonly EndpointI _endpoint; |
| | | 2878 | | |
| | | 2879 | | private ObjectAdapter _adapter; |
| | | 2880 | | |
| | | 2881 | | private readonly Logger _logger; |
| | | 2882 | | private readonly TraceLevels _traceLevels; |
| | | 2883 | | private readonly Ice.Internal.ThreadPool _threadPool; |
| | | 2884 | | private readonly bool _threadHopRequired; |
| | | 2885 | | |
| | | 2886 | | private readonly TimeSpan _connectTimeout; |
| | | 2887 | | private readonly TimeSpan _closeTimeout; |
| | | 2888 | | private TimeSpan _inactivityTimeout; // protected by _mutex |
| | | 2889 | | |
| | | 2890 | | private System.Threading.Timer _inactivityTimer; // can be null |
| | | 2891 | | |
| | | 2892 | | private StartCallback _startCallback; |
| | | 2893 | | |
| | | 2894 | | // This action must be called outside the ConnectionI lock to avoid lock acquisition deadlocks. |
| | | 2895 | | private readonly Action<ConnectionI> _removeFromFactory; |
| | | 2896 | | |
| | | 2897 | | private readonly bool _warn; |
| | | 2898 | | private readonly bool _warnUdp; |
| | | 2899 | | |
| | | 2900 | | private readonly int _compressionLevel; |
| | | 2901 | | |
| | | 2902 | | private int _nextRequestId; |
| | | 2903 | | |
| | | 2904 | | private readonly Dictionary<int, OutgoingAsyncBase> _asyncRequests = new Dictionary<int, OutgoingAsyncBase>(); |
| | | 2905 | | |
| | | 2906 | | private LocalException _exception; |
| | | 2907 | | |
| | | 2908 | | private readonly int _messageSizeMax; |
| | | 2909 | | private readonly BatchRequestQueue _batchRequestQueue; |
| | | 2910 | | |
| | | 2911 | | private readonly LinkedList<OutgoingMessage> _sendStreams = new LinkedList<OutgoingMessage>(); |
| | | 2912 | | |
| | | 2913 | | // Contains the message which is being received. If the connection is waiting to receive a message (_readHeader == |
| | | 2914 | | // true), its size is Protocol.headerSize. Otherwise, its size is the message size specified in the received message |
| | | 2915 | | // header. |
| | | 2916 | | private readonly InputStream _readStream; |
| | | 2917 | | |
| | | 2918 | | // When _readHeader is true, the next bytes we'll read are the header of a new message. When false, we're reading |
| | | 2919 | | // next the remainder of a message that was already partially received. |
| | | 2920 | | private bool _readHeader; |
| | | 2921 | | |
| | | 2922 | | // Contains the message which is being sent. The write stream buffer is empty if no message is being sent. |
| | | 2923 | | private readonly OutputStream _writeStream; |
| | | 2924 | | |
| | | 2925 | | private ConnectionObserver _observer; |
| | | 2926 | | private int _readStreamPos; |
| | | 2927 | | private int _writeStreamPos; |
| | | 2928 | | |
| | | 2929 | | // The upcall count keeps track of the number of dispatches, AMI (response) continuations, sent callbacks and |
| | | 2930 | | // connection establishment callbacks that have been started (or are about to be started) by a thread of the thread |
| | | 2931 | | // pool associated with this connection, and have not completed yet. All these operations except the connection |
| | | 2932 | | // establishment callbacks execute application code or code generated from Slice definitions. |
| | | 2933 | | private int _upcallCount; |
| | | 2934 | | |
| | | 2935 | | // The number of outstanding dispatches. Maintained only while state is StateActive or StateHolding. |
| | | 2936 | | // _dispatchCount can be greater than a non-0 _maxDispatches when a receive a batch with multiples requests. |
| | | 2937 | | private int _dispatchCount; |
| | | 2938 | | |
| | | 2939 | | // When we dispatch _maxDispatches concurrent requests, we stop reading the connection to back-pressure the peer. |
| | | 2940 | | // _maxDispatches <= 0 means no limit. |
| | | 2941 | | private readonly int _maxDispatches; |
| | | 2942 | | |
| | | 2943 | | private int _state; // The current state. |
| | | 2944 | | private bool _shutdownInitiated; |
| | | 2945 | | private bool _initialized; |
| | | 2946 | | private bool _validated; |
| | | 2947 | | |
| | | 2948 | | // When true, the application called close and Connection must close the connection when it receives the reply |
| | | 2949 | | // for the last outstanding invocation. |
| | | 2950 | | private bool _closeRequested; |
| | | 2951 | | |
| | | 2952 | | private ConnectionInfo _info; |
| | | 2953 | | |
| | | 2954 | | private CloseCallback _closeCallback; |
| | | 2955 | | |
| | | 2956 | | // We need to run the continuation asynchronously since it can be completed by an Ice thread pool thread. |
| | | 2957 | | private readonly TaskCompletionSource _closed = new(TaskCreationOptions.RunContinuationsAsynchronously); |
| | | 2958 | | private readonly object _mutex = new(); |
| | | 2959 | | } |