internal override PacketHandle GetResetWritePacket(int dataSize) { SNIHandle handle = Handle; SNIPacket packet = handle.RentPacket(headerSize: handle.ReserveHeaderSize, dataSize: dataSize); #if DEBUG Debug.Assert(packet.IsActive, "packet is not active, a serious pooling error may have occurred"); #endif Debug.Assert(packet.ReservedHeaderSize == handle.ReserveHeaderSize, "failed to reserve header"); return(PacketHandle.FromManagedPacket(packet)); }
/// <summary> /// Process a receive completion /// </summary> /// <param name="packet">SNI packet</param> /// <param name="sniErrorCode">SNI error code</param> public void HandleReceiveComplete(SNIPacket packet, uint sniErrorCode) { long scopeID = SqlClientEventSource.Log.TrySNIScopeEnterEvent("<sc.SNI.SNIMarsConnection.HandleReceiveComplete |SNI|INFO|SCOPE>"); try { SNISMUXHeader currentHeader = null; SNIPacket currentPacket = null; SNIMarsHandle currentSession = null; if (sniErrorCode != TdsEnums.SNI_SUCCESS) { lock (this) { HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent("<sc.SNI.SNIMarsConnection.HandleReceiveComplete |SNI|ERR> not successful."); return; } } while (true) { lock (this) { if (_currentHeaderByteCount != SNISMUXHeader.HEADER_LENGTH) { currentHeader = null; currentPacket = null; currentSession = null; while (_currentHeaderByteCount != SNISMUXHeader.HEADER_LENGTH) { int bytesTaken = packet.TakeData(_headerBytes, _currentHeaderByteCount, SNISMUXHeader.HEADER_LENGTH - _currentHeaderByteCount); _currentHeaderByteCount += bytesTaken; if (bytesTaken == 0) { sniErrorCode = ReceiveAsync(ref packet); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { SqlClientEventSource.Log.TrySNITraceEvent("<sc.SNI.SNIMarsConnection.HandleReceiveComplete |SNI|ERR> not successful."); return; } HandleReceiveError(packet); return; } } _currentHeader.Read(_headerBytes); _dataBytesLeft = (int)_currentHeader.length; _currentPacket = _lowerHandle.RentPacket(headerSize: 0, dataSize: (int)_currentHeader.length); } currentHeader = _currentHeader; currentPacket = _currentPacket; if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_DATA) { if (_dataBytesLeft > 0) { int length = packet.TakeData(_currentPacket, _dataBytesLeft); _dataBytesLeft -= length; if (_dataBytesLeft > 0) { sniErrorCode = ReceiveAsync(ref packet); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { return; } HandleReceiveError(packet); return; } } } _currentHeaderByteCount = 0; if (!_sessions.ContainsKey(_currentHeader.sessionId)) { SNILoadHandle.SingletonInstance.LastError = new SNIError(SNIProviders.SMUX_PROV, 0, SNICommon.InvalidParameterError, Strings.SNI_ERROR_5); HandleReceiveError(packet); _lowerHandle.Dispose(); _lowerHandle = null; return; } if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_FIN) { _sessions.Remove(_currentHeader.sessionId); } else { currentSession = _sessions[_currentHeader.sessionId]; } } if (currentHeader.flags == (byte)SNISMUXFlags.SMUX_DATA) { currentSession.HandleReceiveComplete(currentPacket, currentHeader); } if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_ACK) { try { currentSession.HandleAck(currentHeader.highwater); } catch (Exception e) { SNICommon.ReportSNIError(SNIProviders.SMUX_PROV, SNICommon.InternalExceptionError, e); } Debug.Assert(_currentPacket == currentPacket, "current and _current are not the same"); ReturnPacket(currentPacket); currentPacket = null; _currentPacket = null; } lock (this) { if (packet.DataLeft == 0) { sniErrorCode = ReceiveAsync(ref packet); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { return; } HandleReceiveError(packet); return; } } } } finally { SqlClientEventSource.Log.TrySNIScopeLeaveEvent(scopeID); } }
public SNIPacket RentPacket(int headerSize, int dataSize) => _lowerHandle.RentPacket(headerSize, dataSize);
/// <summary> /// Process a receive completion /// </summary> /// <param name="packet">SNI packet</param> /// <param name="sniErrorCode">SNI error code</param> public void HandleReceiveComplete(SNIPacket packet, uint sniErrorCode) { long scopeID = SqlClientEventSource.Log.TrySNIScopeEnterEvent(s_className); try { SNISMUXHeader currentHeader = null; SNIPacket currentPacket = null; SNIMarsHandle currentSession = null; if (sniErrorCode != TdsEnums.SNI_SUCCESS) { lock (this) { HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "MARS Session Id {0}, Handled receive error code: {1}", args0: _lowerHandle?.ConnectionId, args1: sniErrorCode); return; } } while (true) { lock (this) { if (_currentHeaderByteCount != SNISMUXHeader.HEADER_LENGTH) { currentHeader = null; currentPacket = null; currentSession = null; while (_currentHeaderByteCount != SNISMUXHeader.HEADER_LENGTH) { int bytesTaken = packet.TakeData(_headerBytes, _currentHeaderByteCount, SNISMUXHeader.HEADER_LENGTH - _currentHeaderByteCount); _currentHeaderByteCount += bytesTaken; if (bytesTaken == 0) { sniErrorCode = ReceiveAsync(ref packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "MARS Session Id {0}, Non-SMUX Header SNI Packet received with code {1}", args0: ConnectionId, args1: sniErrorCode); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { return; } HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "MARS Session Id {0}, Handled receive error code: {1}", args0: _lowerHandle?.ConnectionId, args1: sniErrorCode); return; } } _currentHeader.Read(_headerBytes); _dataBytesLeft = (int)_currentHeader.length; _currentPacket = _lowerHandle.RentPacket(headerSize: 0, dataSize: (int)_currentHeader.length); #if DEBUG SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "MARS Session Id {0}, _dataBytesLeft {1}, _currentPacket {2}, Reading data of length: _currentHeader.length {3}", args0: _lowerHandle?.ConnectionId, args1: _dataBytesLeft, args2: currentPacket?._id, args3: _currentHeader?.length); #endif } currentHeader = _currentHeader; currentPacket = _currentPacket; if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_DATA) { if (_dataBytesLeft > 0) { int length = packet.TakeData(_currentPacket, _dataBytesLeft); _dataBytesLeft -= length; if (_dataBytesLeft > 0) { sniErrorCode = ReceiveAsync(ref packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "MARS Session Id {0}, SMUX DATA Header SNI Packet received with code {1}, _dataBytesLeft {2}", args0: ConnectionId, args1: sniErrorCode, args2: _dataBytesLeft); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { return; } HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "MARS Session Id {0}, Handled receive error code: {1}", args0: _lowerHandle?.ConnectionId, args1: sniErrorCode); return; } } } _currentHeaderByteCount = 0; if (!_sessions.ContainsKey(_currentHeader.sessionId)) { SNILoadHandle.SingletonInstance.LastError = new SNIError(SNIProviders.SMUX_PROV, 0, SNICommon.InvalidParameterError, Strings.SNI_ERROR_5); HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "Current Header Session Id {0} not found, MARS Session Id {1} will be destroyed, New SNI error created: {2}", args0: _currentHeader?.sessionId, args1: _lowerHandle?.ConnectionId, args2: sniErrorCode); _lowerHandle.Dispose(); _lowerHandle = null; return; } if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_FIN) { _sessions.Remove(_currentHeader.sessionId); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "SMUX_FIN | MARS Session Id {0}, SMUX_FIN flag received, Current Header Session Id {1} removed", args0: _lowerHandle?.ConnectionId, args1: _currentHeader?.sessionId); } else { currentSession = _sessions[_currentHeader.sessionId]; SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "MARS Session Id {0}, Current Session assigned to Session Id {1}", args0: _lowerHandle?.ConnectionId, args1: _currentHeader?.sessionId); } } if (currentHeader.flags == (byte)SNISMUXFlags.SMUX_DATA) { currentSession.HandleReceiveComplete(currentPacket, currentHeader); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "SMUX_DATA | MARS Session Id {0}, Current Session {1} completed receiving Data", args0: _lowerHandle?.ConnectionId, args1: _currentHeader?.sessionId); } if (_currentHeader.flags == (byte)SNISMUXFlags.SMUX_ACK) { try { currentSession.HandleAck(currentHeader.highwater); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "SMUX_ACK | MARS Session Id {0}, Current Session {1} handled ack", args0: _lowerHandle?.ConnectionId, args1: _currentHeader?.sessionId); } catch (Exception e) { SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "SMUX_ACK | MARS Session Id {0}, Exception occurred: {2}", args0: _currentHeader?.sessionId, args1: e?.Message); SNICommon.ReportSNIError(SNIProviders.SMUX_PROV, SNICommon.InternalExceptionError, e); } #if DEBUG Debug.Assert(_currentPacket == currentPacket, "current and _current are not the same"); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.INFO, "SMUX_ACK | MARS Session Id {0}, Current Packet {1} returned", args0: _lowerHandle?.ConnectionId, args1: currentPacket?._id); #endif ReturnPacket(currentPacket); currentPacket = null; _currentPacket = null; } lock (this) { if (packet.DataLeft == 0) { sniErrorCode = ReceiveAsync(ref packet); if (sniErrorCode == TdsEnums.SNI_SUCCESS_IO_PENDING) { return; } HandleReceiveError(packet); SqlClientEventSource.Log.TrySNITraceEvent(s_className, EventType.ERR, "MARS Session Id {0}, packet.DataLeft 0, SNI error {2}", args0: _lowerHandle?.ConnectionId, args1: sniErrorCode); return; } } } } finally { SqlClientEventSource.Log.TrySNIScopeLeaveEvent(scopeID); } }