internal IAsyncResult BeginReceiveMessageFrom(byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state) { if (s_loggingEnabled) { Logging.Enter(Logging.Sockets, this, "BeginReceiveMessageFrom", ""); } GlobalLog.Print("Socket#" + Logging.HashString(this) + "::BeginReceiveMessageFrom() size:" + size.ToString()); if (CleanedUp) { throw new ObjectDisposedException(this.GetType().FullName); } if (buffer == null) { throw new ArgumentNullException("buffer"); } if (remoteEP == null) { throw new ArgumentNullException("remoteEP"); } if (!CanTryAddressFamily(remoteEP.AddressFamily)) { throw new ArgumentException(SR.Format(SR.net_InvalidEndPointAddressFamily, remoteEP.AddressFamily, _addressFamily), "remoteEP"); } if (offset < 0 || offset > buffer.Length) { throw new ArgumentOutOfRangeException("offset"); } if (size < 0 || size > buffer.Length - offset) { throw new ArgumentOutOfRangeException("size"); } if (_rightEndPoint == null) { throw new InvalidOperationException(SR.net_sockets_mustbind); } // Set up the result and set it to collect the context. ReceiveMessageOverlappedAsyncResult asyncResult = new ReceiveMessageOverlappedAsyncResult(this, state, callback); asyncResult.StartPostingAsyncOp(false); // Start the ReceiveFrom. EndPoint oldEndPoint = _rightEndPoint; // We don't do a CAS demand here because the contents of remoteEP aren't used by // WSARecvMsg; all that matters is that we generate a unique-to-this-call SocketAddress // with the right address family Internals.SocketAddress socketAddress = SnapshotAndSerialize(ref remoteEP); // Guarantee to call CheckAsyncCallOverlappedResult if we call SetUnamangedStructures with a cache in order to // avoid a Socket leak in case of error. SocketError errorCode = SocketError.SocketError; try { // Save a copy of the original EndPoint in the asyncResult. asyncResult.SocketAddressOriginal = IPEndPointExtensions.Serialize(remoteEP); SetReceivingPacketInformation(); if (_rightEndPoint == null) { _rightEndPoint = remoteEP; } errorCode = SocketPal.ReceiveMessageFromAsync(this, _handle, buffer, offset, size, socketFlags, socketAddress, asyncResult); if (errorCode != SocketError.Success) { // WSARecvMsg() will never return WSAEMSGSIZE directly, since a completion is queued in this case. We wouldn't be able // to handle this easily because of assumptions OverlappedAsyncResult makes about whether there would be a completion // or not depending on the error code. If WSAEMSGSIZE would have been normally returned, it returns WSA_IO_PENDING instead. // That same map is implemented here just in case. if (errorCode == SocketError.MessageSize) { GlobalLog.Assert("Socket#" + Logging.HashString(this) + "::BeginReceiveMessageFrom()|Returned WSAEMSGSIZE!"); errorCode = SocketError.IOPending; } } GlobalLog.Print("Socket#" + Logging.HashString(this) + "::BeginReceiveMessageFrom() Interop.Winsock.WSARecvMsg returns:" + errorCode.ToString() + " size:" + size.ToString() + " returning AsyncResult:" + Logging.HashString(asyncResult)); } catch (ObjectDisposedException) { _rightEndPoint = oldEndPoint; throw; } finally { errorCode = asyncResult.CheckAsyncCallOverlappedResult(errorCode); } // Throw an appropriate SocketException if the native call fails synchronously. if (errorCode != SocketError.Success) { // Update the internal state of this socket according to the error before throwing. _rightEndPoint = oldEndPoint; SocketException socketException = new SocketException((int)errorCode); UpdateStatusAfterSocketError(socketException); if (s_loggingEnabled) { Logging.Exception(Logging.Sockets, this, "BeginReceiveMessageFrom", socketException); } throw socketException; } // Capture the context, maybe call the callback, and return. asyncResult.FinishPostingAsyncOp(ref Caches.ReceiveClosureCache); if (asyncResult.CompletedSynchronously && !asyncResult.SocketAddressOriginal.Equals(asyncResult.SocketAddress)) { try { remoteEP = remoteEP.Create(asyncResult.SocketAddress); } catch { } } GlobalLog.Print("Socket#" + Logging.HashString(this) + "::BeginReceiveMessageFrom() size:" + size.ToString() + " returning AsyncResult:" + Logging.HashString(asyncResult)); if (s_loggingEnabled) { Logging.Exit(Logging.Sockets, this, "BeginReceiveMessageFrom", asyncResult); } return asyncResult; }
/// <summary> /// Begins to asynchronously receive the specified number of bytes of data into the specified location of the data buffer, using the specified <see cref="T:System.Net.Sockets.SocketFlags"/>, and stores the endpoint and packet information.. /// </summary> /// /// <returns> /// An <see cref="T:System.IAsyncResult"/> that references the asynchronous read. /// </returns> /// <param name="buffer">An array of type <see cref="T:System.Byte"/> that is the storage location for the received data. </param><param name="offset">The zero-based position in the <paramref name="buffer"/> parameter at which to store the data.</param><param name="size">The number of bytes to receive. </param><param name="socketFlags">A bitwise combination of the <see cref="T:System.Net.Sockets.SocketFlags"/> values.</param><param name="remoteEP">An <see cref="T:System.Net.EndPoint"/> that represents the source of the data.</param><param name="callback">The <see cref="T:System.AsyncCallback"/> delegate.</param><param name="state">An object that contains state information for this request.</param><exception cref="T:System.ArgumentNullException"><paramref name="buffer"/> is null.-or- <paramref name="remoteEP"/> is null. </exception><exception cref="T:System.Net.Sockets.SocketException">An error occurred when attempting to access the socket. See the Remarks section for more information. </exception><exception cref="T:System.ArgumentOutOfRangeException"><paramref name="offset"/> is less than 0.-or- <paramref name="offset"/> is greater than the length of <paramref name="buffer"/>.-or- <paramref name="size"/> is less than 0.-or- <paramref name="size"/> is greater than the length of <paramref name="buffer"/> minus the value of the <paramref name="offset"/> parameter. </exception><exception cref="T:System.ObjectDisposedException">The <see cref="T:System.Net.Sockets.Socket"/> has been closed. </exception><exception cref="T:System.NotSupportedException">The operating system is Windows 2000 or earlier, and this method requires Windows XP.</exception> public IAsyncResult BeginReceiveMessageFrom(byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state) { if (Socket.s_LoggingEnabled) Logging.Enter(Logging.Sockets, (object) this, "BeginReceiveMessageFrom", ""); if (this.CleanedUp) throw new ObjectDisposedException(this.GetType().FullName); if (buffer == null) throw new ArgumentNullException("buffer"); if (remoteEP == null) throw new ArgumentNullException("remoteEP"); if (!this.CanTryAddressFamily(remoteEP.AddressFamily)) { throw new ArgumentException(SR.GetString("net_InvalidEndPointAddressFamily", (object) remoteEP.AddressFamily, (object) this.addressFamily), "remoteEP"); } else { if (offset < 0 || offset > buffer.Length) throw new ArgumentOutOfRangeException("offset"); if (size < 0 || size > buffer.Length - offset) throw new ArgumentOutOfRangeException("size"); if (this.m_RightEndPoint == null) throw new InvalidOperationException(SR.GetString("net_sockets_mustbind")); ReceiveMessageOverlappedAsyncResult overlappedAsyncResult = new ReceiveMessageOverlappedAsyncResult(this, state, callback); overlappedAsyncResult.StartPostingAsyncOp(false); EndPoint endPoint = this.m_RightEndPoint; SocketAddress socketAddress = this.SnapshotAndSerialize(ref remoteEP); SocketError socketError = SocketError.SocketError; try { overlappedAsyncResult.SetUnmanagedStructures(buffer, offset, size, socketAddress, socketFlags, ref this.Caches.ReceiveOverlappedCache); overlappedAsyncResult.SocketAddressOriginal = remoteEP.Serialize(); this.SetReceivingPacketInformation(); if (this.m_RightEndPoint == null) this.m_RightEndPoint = remoteEP; int bytesTransferred; socketError = this.WSARecvMsg(this.m_Handle, Marshal.UnsafeAddrOfPinnedArrayElement((Array) overlappedAsyncResult.m_MessageBuffer, 0), out bytesTransferred, overlappedAsyncResult.OverlappedHandle, IntPtr.Zero); if (socketError != SocketError.Success) { socketError = (SocketError) Marshal.GetLastWin32Error(); if (socketError == SocketError.MessageSize) socketError = SocketError.IOPending; } } catch (ObjectDisposedException ex) { this.m_RightEndPoint = endPoint; throw; } finally { socketError = overlappedAsyncResult.CheckAsyncCallOverlappedResult(socketError); } if (socketError != SocketError.Success) { this.m_RightEndPoint = endPoint; overlappedAsyncResult.ExtractCache(ref this.Caches.ReceiveOverlappedCache); SocketException socketException = new SocketException(socketError); this.UpdateStatusAfterSocketError(socketException); if (Socket.s_LoggingEnabled) Logging.Exception(Logging.Sockets, (object) this, "BeginReceiveMessageFrom", (Exception) socketException); throw socketException; } else { overlappedAsyncResult.FinishPostingAsyncOp(ref this.Caches.ReceiveClosureCache); if (overlappedAsyncResult.CompletedSynchronously) { if (!overlappedAsyncResult.SocketAddressOriginal.Equals((object) overlappedAsyncResult.SocketAddress)) { try { remoteEP = remoteEP.Create(overlappedAsyncResult.SocketAddress); } catch { } } } if (Socket.s_LoggingEnabled) Logging.Exit(Logging.Sockets, (object) this, "BeginReceiveMessageFrom", (object) overlappedAsyncResult); return (IAsyncResult) overlappedAsyncResult; } } }
public IAsyncResult BeginReceiveMessageFrom(byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state) { if (s_LoggingEnabled) Logging.Enter(Logging.Sockets, this, "BeginReceiveMessageFrom", ""); GlobalLog.Print("Socket#" + ValidationHelper.HashString(this) + "::BeginReceiveMessageFrom() size:" + size.ToString()); if (CleanedUp) { throw new ObjectDisposedException(this.GetType().FullName); } if (buffer==null) { throw new ArgumentNullException("buffer"); } if (remoteEP==null) { throw new ArgumentNullException("remoteEP"); } if (!CanTryAddressFamily(remoteEP.AddressFamily)) { throw new ArgumentException(SR.GetString(SR.net_InvalidEndPointAddressFamily, remoteEP.AddressFamily, addressFamily), "remoteEP"); } if (offset<0 || offset>buffer.Length) { throw new ArgumentOutOfRangeException("offset"); } if (size<0 || size>buffer.Length-offset) { throw new ArgumentOutOfRangeException("size"); } if (m_RightEndPoint==null) { throw new InvalidOperationException(SR.GetString(SR.net_sockets_mustbind)); } // Set up the result and set it to collect the context. ReceiveMessageOverlappedAsyncResult asyncResult = new ReceiveMessageOverlappedAsyncResult(this, state, callback); asyncResult.StartPostingAsyncOp(false); // Start the ReceiveFrom. EndPoint oldEndPoint = m_RightEndPoint; // We don't do a CAS demand here because the contents of remoteEP aren't used by // WSARecvMsg; all that matters is that we generate a unique-to-this-call SocketAddress // with the right address family SocketAddress socketAddress = SnapshotAndSerialize(ref remoteEP); // Guarantee to call CheckAsyncCallOverlappedResult if we call SetUnamangedStructures with a cache in order to // avoid a Socket leak in case of error. SocketError errorCode = SocketError.SocketError; try { asyncResult.SetUnmanagedStructures(buffer, offset, size, socketAddress, socketFlags, ref Caches.ReceiveOverlappedCache); // save a copy of the original EndPoint in the asyncResult asyncResult.SocketAddressOriginal = remoteEP.Serialize(); int bytesTransfered; SetReceivingPacketInformation(); if (m_RightEndPoint == null) { m_RightEndPoint = remoteEP; } errorCode = (SocketError) WSARecvMsg( m_Handle, Marshal.UnsafeAddrOfPinnedArrayElement(asyncResult.m_MessageBuffer,0), out bytesTransfered, asyncResult.OverlappedHandle, IntPtr.Zero); if (errorCode!=SocketError.Success) { errorCode = (SocketError)Marshal.GetLastWin32Error(); // I have guarantees from Brad Williamson that WSARecvMsg() will never return WSAEMSGSIZE directly, since a completion // is queued in this case. We wouldn't be able to handle this easily because of assumptions OverlappedAsyncResult // makes about whether there would be a completion or not depending on the error code. If WSAEMSGSIZE would have been // normally returned, it returns WSA_IO_PENDING instead. That same map is implemented here just in case. if (errorCode == SocketError.MessageSize) { GlobalLog.Assert("Socket#" + ValidationHelper.HashString(this) + "::BeginReceiveMessageFrom()|Returned WSAEMSGSIZE!"); errorCode = SocketError.IOPending; } } GlobalLog.Print("Socket#" + ValidationHelper.HashString(this) + "::BeginReceiveMessageFrom() UnsafeNclNativeMethods.OSSOCK.WSARecvMsg returns:" + errorCode.ToString() + " size:" + size.ToString() + " returning AsyncResult:" + ValidationHelper.HashString(asyncResult)); } catch (ObjectDisposedException) { m_RightEndPoint = oldEndPoint; throw; } finally { errorCode = asyncResult.CheckAsyncCallOverlappedResult(errorCode); } // // if the asynchronous native call fails synchronously // we'll throw a SocketException // if (errorCode!=SocketError.Success) { // // update our internal state after this socket error and throw // m_RightEndPoint = oldEndPoint; asyncResult.ExtractCache(ref Caches.ReceiveOverlappedCache); SocketException socketException = new SocketException(errorCode); UpdateStatusAfterSocketError(socketException); if (s_LoggingEnabled) Logging.Exception(Logging.Sockets, this, "BeginReceiveMessageFrom", socketException); throw socketException; } // Capture the context, maybe call the callback, and return. asyncResult.FinishPostingAsyncOp(ref Caches.ReceiveClosureCache); if (asyncResult.CompletedSynchronously && !asyncResult.SocketAddressOriginal.Equals(asyncResult.SocketAddress)) { try { remoteEP = remoteEP.Create(asyncResult.SocketAddress); } catch { } } GlobalLog.Print("Socket#" + ValidationHelper.HashString(this) + "::BeginReceiveMessageFrom() size:" + size.ToString() + " returning AsyncResult:" + ValidationHelper.HashString(asyncResult)); if(s_LoggingEnabled)Logging.Exit(Logging.Sockets, this, "BeginReceiveMessageFrom", asyncResult); return asyncResult; }
public IAsyncResult BeginReceiveMessageFrom(byte[] buffer, int offset, int size, SocketFlags socketFlags, ref EndPoint remoteEP, AsyncCallback callback, object state) { if (s_LoggingEnabled) { Logging.Enter(Logging.Sockets, this, "BeginReceiveMessageFrom", ""); } if (this.CleanedUp) { throw new ObjectDisposedException(base.GetType().FullName); } if (!ComNetOS.IsPostWin2K) { throw new PlatformNotSupportedException(SR.GetString("WinXPRequired")); } if (buffer == null) { throw new ArgumentNullException("buffer"); } if (remoteEP == null) { throw new ArgumentNullException("remoteEP"); } if (remoteEP.AddressFamily != this.addressFamily) { throw new ArgumentException(SR.GetString("net_InvalidEndPointAddressFamily", new object[] { remoteEP.AddressFamily, this.addressFamily }), "remoteEP"); } if ((offset < 0) || (offset > buffer.Length)) { throw new ArgumentOutOfRangeException("offset"); } if ((size < 0) || (size > (buffer.Length - offset))) { throw new ArgumentOutOfRangeException("size"); } if (this.m_RightEndPoint == null) { throw new InvalidOperationException(SR.GetString("net_sockets_mustbind")); } ReceiveMessageOverlappedAsyncResult retObject = new ReceiveMessageOverlappedAsyncResult(this, state, callback); retObject.StartPostingAsyncOp(false); EndPoint rightEndPoint = this.m_RightEndPoint; EndPoint point2 = remoteEP; SocketAddress socketAddress = this.SnapshotAndSerialize(ref point2); SocketError socketError = SocketError.SocketError; try { int num; retObject.SetUnmanagedStructures(buffer, offset, size, socketAddress, socketFlags, ref this.Caches.ReceiveOverlappedCache); retObject.SocketAddressOriginal = point2.Serialize(); this.SetReceivingPacketInformation(); if (this.m_RightEndPoint == null) { this.m_RightEndPoint = point2; } socketError = this.WSARecvMsg(this.m_Handle, Marshal.UnsafeAddrOfPinnedArrayElement(retObject.m_MessageBuffer, 0), out num, retObject.OverlappedHandle, IntPtr.Zero); if (socketError != SocketError.Success) { socketError = (SocketError) Marshal.GetLastWin32Error(); if (socketError == SocketError.MessageSize) { socketError = SocketError.IOPending; } } } catch (ObjectDisposedException) { this.m_RightEndPoint = rightEndPoint; throw; } finally { socketError = retObject.CheckAsyncCallOverlappedResult(socketError); } if (socketError != SocketError.Success) { this.m_RightEndPoint = rightEndPoint; retObject.ExtractCache(ref this.Caches.ReceiveOverlappedCache); SocketException socketException = new SocketException(socketError); this.UpdateStatusAfterSocketError(socketException); if (s_LoggingEnabled) { Logging.Exception(Logging.Sockets, this, "BeginReceiveMessageFrom", socketException); } throw socketException; } retObject.FinishPostingAsyncOp(ref this.Caches.ReceiveClosureCache); if (retObject.CompletedSynchronously && !retObject.SocketAddressOriginal.Equals(retObject.SocketAddress)) { try { remoteEP = point2.Create(retObject.SocketAddress); } catch { } } if (s_LoggingEnabled) { Logging.Exit(Logging.Sockets, this, "BeginReceiveMessageFrom", retObject); } return retObject; }