2016-11-04 04:31:05 -04:00
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using System;
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2016-10-29 18:22:20 -04:00
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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.Threading;
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2016-10-29 18:22:20 -04:00
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using System.Threading.Tasks;
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2016-11-08 13:44:23 -05:00
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using Emby.Common.Implementations.Networking;
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using MediaBrowser.Model.Net;
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2016-10-29 18:22:20 -04:00
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2016-11-04 04:31:05 -04:00
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namespace Emby.Common.Implementations.Net
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2016-10-29 18:22:20 -04:00
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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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2017-03-02 15:50:09 -05:00
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internal sealed class UdpSocket : DisposableManagedObjectBase, ISocket
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{
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private Socket _Socket;
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private int _LocalPort;
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private readonly SocketAsyncEventArgs _receiveSocketAsyncEventArgs = new SocketAsyncEventArgs()
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{
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SocketFlags = SocketFlags.None
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};
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private readonly SocketAsyncEventArgs _sendSocketAsyncEventArgs = new SocketAsyncEventArgs()
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{
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SocketFlags = SocketFlags.None
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};
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private TaskCompletionSource<SocketReceiveResult> _currentReceiveTaskCompletionSource;
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private TaskCompletionSource<int> _currentSendTaskCompletionSource;
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private readonly SemaphoreSlim _sendLock = new SemaphoreSlim(1, 1);
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public UdpSocket(Socket socket, int localPort, IPAddress ip)
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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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LocalIPAddress = NetworkManager.ToIpAddressInfo(ip);
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_Socket.Bind(new IPEndPoint(ip, _LocalPort));
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InitReceiveSocketAsyncEventArgs();
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}
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private void InitReceiveSocketAsyncEventArgs()
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{
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var receiveBuffer = new byte[8192];
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_receiveSocketAsyncEventArgs.SetBuffer(receiveBuffer, 0, receiveBuffer.Length);
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_receiveSocketAsyncEventArgs.Completed += _receiveSocketAsyncEventArgs_Completed;
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var sendBuffer = new byte[8192];
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_sendSocketAsyncEventArgs.SetBuffer(sendBuffer, 0, sendBuffer.Length);
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_sendSocketAsyncEventArgs.Completed += _sendSocketAsyncEventArgs_Completed;
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}
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private void _receiveSocketAsyncEventArgs_Completed(object sender, SocketAsyncEventArgs e)
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{
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var tcs = _currentReceiveTaskCompletionSource;
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if (tcs != null)
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{
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_currentReceiveTaskCompletionSource = null;
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if (e.SocketError == SocketError.Success)
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{
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tcs.TrySetResult(new SocketReceiveResult
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{
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Buffer = e.Buffer,
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ReceivedBytes = e.BytesTransferred,
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RemoteEndPoint = ToIpEndPointInfo(e.RemoteEndPoint as IPEndPoint),
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LocalIPAddress = LocalIPAddress
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});
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}
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else
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{
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tcs.TrySetException(new Exception("SocketError: " + e.SocketError));
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}
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}
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}
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private void _sendSocketAsyncEventArgs_Completed(object sender, SocketAsyncEventArgs e)
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{
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var tcs = _currentSendTaskCompletionSource;
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if (tcs != null)
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{
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_currentSendTaskCompletionSource = null;
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if (e.SocketError == SocketError.Success)
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{
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tcs.TrySetResult(e.BytesTransferred);
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}
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else
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{
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tcs.TrySetException(new Exception("SocketError: " + e.SocketError));
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}
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}
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}
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public UdpSocket(Socket socket, IpEndPointInfo endPoint)
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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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_Socket.Connect(NetworkManager.ToIPEndPoint(endPoint));
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InitReceiveSocketAsyncEventArgs();
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}
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public IpAddressInfo LocalIPAddress
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{
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get;
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private set;
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}
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public Task<SocketReceiveResult> ReceiveAsync(CancellationToken cancellationToken)
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{
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ThrowIfDisposed();
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var tcs = new TaskCompletionSource<SocketReceiveResult>();
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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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cancellationToken.Register(() => tcs.TrySetCanceled());
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_receiveSocketAsyncEventArgs.RemoteEndPoint = receivedFromEndPoint;
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_currentReceiveTaskCompletionSource = tcs;
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try
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{
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var willRaiseEvent = _Socket.ReceiveFromAsync(_receiveSocketAsyncEventArgs);
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if (!willRaiseEvent)
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{
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_receiveSocketAsyncEventArgs_Completed(this, _receiveSocketAsyncEventArgs);
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}
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}
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catch (Exception ex)
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{
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tcs.TrySetException(ex);
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}
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return tcs.Task;
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}
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public Task SendAsync(byte[] buffer, int size, IpEndPointInfo endPoint, CancellationToken cancellationToken)
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{
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ThrowIfDisposed();
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if (buffer == null) throw new ArgumentNullException("messageData");
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if (endPoint == null) throw new ArgumentNullException("endPoint");
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var ipEndPoint = NetworkManager.ToIPEndPoint(endPoint);
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#if NETSTANDARD1_6
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if (size != buffer.Length)
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{
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byte[] copy = new byte[size];
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Buffer.BlockCopy(buffer, 0, copy, 0, size);
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buffer = copy;
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}
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cancellationToken.ThrowIfCancellationRequested();
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_Socket.SendTo(buffer, ipEndPoint);
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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(buffer, 0, size, SocketFlags.None, ipEndPoint, result =>
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{
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if (cancellationToken.IsCancellationRequested)
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{
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taskSource.TrySetCanceled();
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return;
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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 (Exception 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 (Exception ex)
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{
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taskSource.TrySetException(ex);
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}
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return taskSource.Task;
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#endif
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//ThrowIfDisposed();
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//if (buffer == null) throw new ArgumentNullException("messageData");
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//if (endPoint == null) throw new ArgumentNullException("endPoint");
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//cancellationToken.ThrowIfCancellationRequested();
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//var tcs = new TaskCompletionSource<int>();
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//cancellationToken.Register(() => tcs.TrySetCanceled());
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//_sendSocketAsyncEventArgs.SetBuffer(buffer, 0, size);
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//_sendSocketAsyncEventArgs.RemoteEndPoint = NetworkManager.ToIPEndPoint(endPoint);
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//_currentSendTaskCompletionSource = tcs;
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//var willRaiseEvent = _Socket.SendAsync(_sendSocketAsyncEventArgs);
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//if (!willRaiseEvent)
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//{
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// _sendSocketAsyncEventArgs_Completed(this, _sendSocketAsyncEventArgs);
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//}
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//return tcs.Task;
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}
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public async Task SendWithLockAsync(byte[] buffer, int size, IpEndPointInfo endPoint, CancellationToken cancellationToken)
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{
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ThrowIfDisposed();
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//await _sendLock.WaitAsync(cancellationToken).ConfigureAwait(false);
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try
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{
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await SendAsync(buffer, size, endPoint, cancellationToken).ConfigureAwait(false);
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}
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finally
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{
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//_sendLock.Release();
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}
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}
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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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_sendLock.Dispose();
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var tcs = _currentReceiveTaskCompletionSource;
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if (tcs != null)
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{
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tcs.TrySetCanceled();
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}
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var sendTcs = _currentSendTaskCompletionSource;
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if (sendTcs != null)
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{
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sendTcs.TrySetCanceled();
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}
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}
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}
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private static IpEndPointInfo ToIpEndPointInfo(IPEndPoint endpoint)
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{
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if (endpoint == null)
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{
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return null;
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}
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2016-11-11 02:24:36 -05:00
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return NetworkManager.ToIpEndPointInfo(endpoint);
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}
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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.RemoteEndPoint);
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var ipEndPoint = state.RemoteEndPoint as IPEndPoint;
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state.TaskCompletionSource.SetResult(
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new SocketReceiveResult
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{
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Buffer = state.Buffer,
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ReceivedBytes = bytesRead,
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RemoteEndPoint = ToIpEndPointInfo(ipEndPoint),
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LocalIPAddress = LocalIPAddress
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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();
|
|
|
|
|
}
|
|
|
|
|
catch (Exception ex)
|
|
|
|
|
{
|
|
|
|
|
state.TaskCompletionSource.SetException(ex);
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
private class AsyncReceiveState
|
|
|
|
|
{
|
|
|
|
|
public AsyncReceiveState(Socket socket, EndPoint remoteEndPoint)
|
|
|
|
|
{
|
|
|
|
|
this.Socket = socket;
|
|
|
|
|
this.RemoteEndPoint = remoteEndPoint;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
public EndPoint RemoteEndPoint;
|
|
|
|
|
public byte[] Buffer = new byte[8192];
|
|
|
|
|
|
|
|
|
|
public Socket Socket { get; private set; }
|
|
|
|
|
|
|
|
|
|
public TaskCompletionSource<SocketReceiveResult> TaskCompletionSource { get; set; }
|
|
|
|
|
|
|
|
|
|
}
|
2016-10-29 18:22:20 -04:00
|
|
|
|
}
|
2016-11-04 04:31:05 -04:00
|
|
|
|
}
|