259 lines
8.8 KiB
C#
259 lines
8.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using System.Security;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using Rssdp.Infrastructure;
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namespace Rssdp
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{
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// THIS IS A LINKED FILE - SHARED AMONGST MULTIPLE PLATFORMS
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// Be careful to check any changes compile and work for all platform projects it is shared in.
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internal sealed class UdpSocket : DisposableManagedObjectBase, IUdpSocket
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{
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#region Fields
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private System.Net.Sockets.Socket _Socket;
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private int _LocalPort;
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#endregion
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#region Constructors
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public UdpSocket(System.Net.Sockets.Socket socket, int localPort, string ipAddress)
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{
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if (socket == null) throw new ArgumentNullException("socket");
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_Socket = socket;
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_LocalPort = localPort;
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IPAddress ip = null;
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if (String.IsNullOrEmpty(ipAddress))
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ip = IPAddress.Any;
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else
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ip = IPAddress.Parse(ipAddress);
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_Socket.Bind(new IPEndPoint(ip, _LocalPort));
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if (_LocalPort == 0)
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_LocalPort = (_Socket.LocalEndPoint as IPEndPoint).Port;
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}
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#endregion
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#region IUdpSocket Members
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public System.Threading.Tasks.Task<ReceivedUdpData> ReceiveAsync()
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{
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ThrowIfDisposed();
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var tcs = new TaskCompletionSource<ReceivedUdpData>();
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System.Net.EndPoint receivedFromEndPoint = new IPEndPoint(IPAddress.Any, 0);
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var state = new AsyncReceiveState(_Socket, receivedFromEndPoint);
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state.TaskCompletionSource = tcs;
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#if NETSTANDARD1_6
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_Socket.ReceiveFromAsync(new System.ArraySegment<Byte>(state.Buffer), System.Net.Sockets.SocketFlags.None, state.EndPoint)
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.ContinueWith((task, asyncState) =>
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{
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if (task.Status != TaskStatus.Faulted)
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{
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var receiveState = asyncState as AsyncReceiveState;
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receiveState.EndPoint = task.Result.RemoteEndPoint;
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ProcessResponse(receiveState, () => task.Result.ReceivedBytes);
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}
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}, state);
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#else
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_Socket.BeginReceiveFrom(state.Buffer, 0, state.Buffer.Length, System.Net.Sockets.SocketFlags.None, ref state.EndPoint, new AsyncCallback(this.ProcessResponse), state);
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#endif
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return tcs.Task;
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}
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public Task SendTo(byte[] messageData, UdpEndPoint endPoint)
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{
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ThrowIfDisposed();
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if (messageData == null) throw new ArgumentNullException("messageData");
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if (endPoint == null) throw new ArgumentNullException("endPoint");
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#if NETSTANDARD1_6
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_Socket.SendTo(messageData, new System.Net.IPEndPoint(IPAddress.Parse(endPoint.IPAddress), endPoint.Port));
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return Task.FromResult(true);
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#else
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var taskSource = new TaskCompletionSource<bool>();
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try
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{
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_Socket.BeginSendTo(messageData, 0, messageData.Length, SocketFlags.None, new System.Net.IPEndPoint(IPAddress.Parse(endPoint.IPAddress), endPoint.Port), result =>
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{
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try
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{
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_Socket.EndSend(result);
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taskSource.TrySetResult(true);
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}
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catch (SocketException ex)
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{
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taskSource.TrySetException(ex);
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}
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catch (ObjectDisposedException ex)
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{
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taskSource.TrySetException(ex);
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}
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catch (InvalidOperationException ex)
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{
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taskSource.TrySetException(ex);
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}
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catch (SecurityException ex)
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{
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taskSource.TrySetException(ex);
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}
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}, null);
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}
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catch (SocketException ex)
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{
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taskSource.TrySetException(ex);
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}
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catch (ObjectDisposedException ex)
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{
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taskSource.TrySetException(ex);
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}
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catch (SecurityException ex)
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{
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taskSource.TrySetException(ex);
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}
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//_Socket.SendTo(messageData, new System.Net.IPEndPoint(IPAddress.Parse(endPoint.IPAddress), endPoint.Port));
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return taskSource.Task;
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#endif
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}
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#endregion
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#region Overrides
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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var socket = _Socket;
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if (socket != null)
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socket.Dispose();
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}
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}
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#endregion
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#region Private Methods
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[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "Exceptions via task methods should be reported by task completion source, so this should be ok.")]
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private static void ProcessResponse(AsyncReceiveState state, Func<int> receiveData)
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{
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try
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{
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var bytesRead = receiveData();
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var ipEndPoint = state.EndPoint as IPEndPoint;
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state.TaskCompletionSource.SetResult(
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new ReceivedUdpData()
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{
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Buffer = state.Buffer,
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ReceivedBytes = bytesRead,
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ReceivedFrom = new UdpEndPoint()
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{
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IPAddress = ipEndPoint.Address.ToString(),
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Port = ipEndPoint.Port
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}
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}
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);
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}
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catch (ObjectDisposedException)
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{
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state.TaskCompletionSource.SetCanceled();
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}
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catch (SocketException se)
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{
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if (se.SocketErrorCode != SocketError.Interrupted && se.SocketErrorCode != SocketError.OperationAborted && se.SocketErrorCode != SocketError.Shutdown)
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state.TaskCompletionSource.SetException(se);
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else
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state.TaskCompletionSource.SetCanceled();
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}
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catch (Exception ex)
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{
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state.TaskCompletionSource.SetException(ex);
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}
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}
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[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes", Justification = "Exceptions via task methods should be reported by task completion source, so this should be ok.")]
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private void ProcessResponse(IAsyncResult asyncResult)
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{
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#if NET46
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var state = asyncResult.AsyncState as AsyncReceiveState;
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try
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{
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var bytesRead = state.Socket.EndReceiveFrom(asyncResult, ref state.EndPoint);
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var ipEndPoint = state.EndPoint as IPEndPoint;
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state.TaskCompletionSource.SetResult(
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new ReceivedUdpData()
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{
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Buffer = state.Buffer,
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ReceivedBytes = bytesRead,
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ReceivedFrom = new UdpEndPoint()
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{
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IPAddress = ipEndPoint.Address.ToString(),
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Port = ipEndPoint.Port
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}
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}
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);
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}
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catch (ObjectDisposedException)
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{
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state.TaskCompletionSource.SetCanceled();
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}
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catch (SocketException se)
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{
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if (se.SocketErrorCode != SocketError.Interrupted && se.SocketErrorCode != SocketError.OperationAborted && se.SocketErrorCode != SocketError.Shutdown)
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state.TaskCompletionSource.SetException(se);
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else
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state.TaskCompletionSource.SetCanceled();
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}
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catch (Exception ex)
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{
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state.TaskCompletionSource.SetException(ex);
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}
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#endif
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}
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#endregion
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#region Private Classes
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private class AsyncReceiveState
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{
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public AsyncReceiveState(System.Net.Sockets.Socket socket, EndPoint endPoint)
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{
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this.Socket = socket;
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this.EndPoint = endPoint;
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}
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public EndPoint EndPoint;
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public byte[] Buffer = new byte[SsdpConstants.DefaultUdpSocketBufferSize];
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public System.Net.Sockets.Socket Socket { get; private set; }
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public TaskCompletionSource<ReceivedUdpData> TaskCompletionSource { get; set; }
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}
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#endregion
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}
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} |