mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-07 20:08:59 +02:00
254 lines
7.8 KiB
C#
254 lines
7.8 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.Threading;
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using System.Threading.Tasks;
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using Emby.Common.Implementations.Networking;
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using MediaBrowser.Model.Net;
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namespace Emby.Common.Implementations.Net
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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, ISocket
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{
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#region Fields
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private Socket _Socket;
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private int _LocalPort;
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#endregion
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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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}
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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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}
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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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#region ISocket Members
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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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#if NETSTANDARD1_6
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_Socket.ReceiveFromAsync(new ArraySegment<Byte>(state.Buffer), SocketFlags.None, state.RemoteEndPoint)
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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.RemoteEndPoint = task.Result.RemoteEndPoint;
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ProcessResponse(receiveState, () => task.Result.ReceivedBytes, LocalIPAddress);
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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, SocketFlags.None, ref state.RemoteEndPoint, ProcessResponse, state);
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#endif
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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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//_Socket.SendTo(messageData, new System.Net.IPEndPoint(IPAddress.Parse(RemoteEndPoint.IPAddress), RemoteEndPoint.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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private static void ProcessResponse(AsyncReceiveState state, Func<int> receiveData, IpAddressInfo localIpAddress)
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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.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();
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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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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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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();
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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(Socket socket, EndPoint remoteEndPoint)
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{
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this.Socket = socket;
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this.RemoteEndPoint = remoteEndPoint;
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}
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public EndPoint RemoteEndPoint;
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public byte[] Buffer = new byte[8192];
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public Socket Socket { get; private set; }
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public TaskCompletionSource<SocketReceiveResult> TaskCompletionSource { get; set; }
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}
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#endregion
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}
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}
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