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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System.Collections.Generic;
using System.Threading.Tasks;
using System.Threading;
namespace System.Net.Sockets
{
public static class SocketTaskExtensions
{
public static Task<Socket> AcceptAsync(this Socket socket)
{
return Task<Socket>.Factory.FromAsync(
(callback, state) => ((Socket)state).BeginAccept(callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndAccept(asyncResult),
state: socket);
}
public static Task<Socket> AcceptAsync(this Socket socket, Socket acceptSocket)
{
const int ReceiveSize = 0;
return Task<Socket>.Factory.FromAsync(
(socketForAccept, receiveSize, callback, state) => ((Socket)state).BeginAccept(socketForAccept, receiveSize, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndAccept(asyncResult),
acceptSocket,
ReceiveSize,
state: socket);
}
public static Task ConnectAsync(this Socket socket, EndPoint remoteEP)
{
return Task.Factory.FromAsync(
(targetEndPoint, callback, state) => ((Socket)state).BeginConnect(targetEndPoint, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndConnect(asyncResult),
remoteEP,
state: socket);
}
public static Task ConnectAsync(this Socket socket, IPAddress address, int port)
{
return Task.Factory.FromAsync(
(targetAddress, targetPort, callback, state) => ((Socket)state).BeginConnect(targetAddress, targetPort, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndConnect(asyncResult),
address,
port,
state: socket);
}
public static Task ConnectAsync(this Socket socket, IPAddress[] addresses, int port)
{
return Task.Factory.FromAsync(
(targetAddresses, targetPort, callback, state) => ((Socket)state).BeginConnect(targetAddresses, targetPort, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndConnect(asyncResult),
addresses,
port,
state: socket);
}
public static Task ConnectAsync(this Socket socket, string host, int port)
{
return Task.Factory.FromAsync(
(targetHost, targetPort, callback, state) => ((Socket)state).BeginConnect(targetHost, targetPort, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndConnect(asyncResult),
host,
port,
state: socket);
}
public static Task<int> ReceiveAsync(this Socket socket, ArraySegment<byte> buffer, SocketFlags socketFlags)
{
return Task<int>.Factory.FromAsync(
(targetBuffer, flags, callback, state) => ((Socket)state).BeginReceive(
targetBuffer.Array,
targetBuffer.Offset,
targetBuffer.Count,
flags,
callback,
state),
asyncResult => ((Socket)asyncResult.AsyncState).EndReceive(asyncResult),
buffer,
socketFlags,
state: socket);
}
public static Task<int> ReceiveAsync(
this Socket socket,
IList<ArraySegment<byte>> buffers,
SocketFlags socketFlags)
{
return Task<int>.Factory.FromAsync(
(targetBuffers, flags, callback, state) => ((Socket)state).BeginReceive(targetBuffers, flags, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndReceive(asyncResult),
buffers,
socketFlags,
state: socket);
}
public static Task<SocketReceiveFromResult> ReceiveFromAsync(
this Socket socket,
ArraySegment<byte> buffer,
SocketFlags socketFlags,
EndPoint remoteEndPoint)
{
object[] packedArguments = new object[] { socket, remoteEndPoint };
return Task<SocketReceiveFromResult>.Factory.FromAsync(
(targetBuffer, flags, callback, state) =>
{
var arguments = (object[])state;
var s = (Socket)arguments[0];
var e = (EndPoint)arguments[1];
IAsyncResult result = s.BeginReceiveFrom(
targetBuffer.Array,
targetBuffer.Offset,
targetBuffer.Count,
flags,
ref e,
callback,
state);
arguments[1] = e;
return result;
},
asyncResult =>
{
var arguments = (object[])asyncResult.AsyncState;
var s = (Socket)arguments[0];
var e = (EndPoint)arguments[1];
int bytesReceived = s.EndReceiveFrom(asyncResult, ref e);
return new SocketReceiveFromResult()
{
ReceivedBytes = bytesReceived,
RemoteEndPoint = e
};
},
buffer,
socketFlags,
state: packedArguments);
}
public static Task<SocketReceiveMessageFromResult> ReceiveMessageFromAsync(
this Socket socket,
ArraySegment<byte> buffer,
SocketFlags socketFlags,
EndPoint remoteEndPoint)
{
object[] packedArguments = new object[] { socket, socketFlags, remoteEndPoint };
return Task<SocketReceiveMessageFromResult>.Factory.FromAsync(
(targetBuffer, callback, state) =>
{
var arguments = (object[])state;
var s = (Socket)arguments[0];
var f = (SocketFlags)arguments[1];
var e = (EndPoint)arguments[2];
IAsyncResult result = s.BeginReceiveMessageFrom(
targetBuffer.Array,
targetBuffer.Offset,
targetBuffer.Count,
f,
ref e,
callback,
state);
arguments[2] = e;
return result;
},
asyncResult =>
{
var arguments = (object[])asyncResult.AsyncState;
var s = (Socket)arguments[0];
var f = (SocketFlags)arguments[1];
var e = (EndPoint)arguments[2];
IPPacketInformation ipPacket;
int bytesReceived = s.EndReceiveMessageFrom(
asyncResult,
ref f,
ref e,
out ipPacket);
return new SocketReceiveMessageFromResult()
{
PacketInformation = ipPacket,
ReceivedBytes = bytesReceived,
RemoteEndPoint = e,
SocketFlags = f
};
},
buffer,
state: packedArguments);
}
public static Task<int> SendAsync(this Socket socket, ArraySegment<byte> buffer, SocketFlags socketFlags)
{
return Task<int>.Factory.FromAsync(
(targetBuffer, flags, callback, state) => ((Socket)state).BeginSend(
targetBuffer.Array,
targetBuffer.Offset,
targetBuffer.Count,
flags,
callback,
state),
asyncResult => ((Socket)asyncResult.AsyncState).EndSend(asyncResult),
buffer,
socketFlags,
state: socket);
}
public static Task<int> SendAsync(
this Socket socket,
IList<ArraySegment<byte>> buffers,
SocketFlags socketFlags)
{
return Task<int>.Factory.FromAsync(
(targetBuffers, flags, callback, state) => ((Socket)state).BeginSend(targetBuffers, flags, callback, state),
asyncResult => ((Socket)asyncResult.AsyncState).EndSend(asyncResult),
buffers,
socketFlags,
state: socket);
}
public static Task<int> SendToAsync(
this Socket socket,
ArraySegment<byte> buffer,
SocketFlags socketFlags,
EndPoint remoteEP)
{
return Task<int>.Factory.FromAsync(
(targetBuffer, flags, endPoint, callback, state) => ((Socket)state).BeginSendTo(
targetBuffer.Array,
targetBuffer.Offset,
targetBuffer.Count,
flags,
endPoint,
callback,
state),
asyncResult => ((Socket)asyncResult.AsyncState).EndSendTo(asyncResult),
buffer,
socketFlags,
remoteEP,
state: socket);
}
public static ValueTask<int> SendAsync(this Socket socket, ReadOnlyMemory<byte> buffer, SocketFlags socketFlags, CancellationToken cancellationToken = default) =>
socket.SendAsync(buffer, socketFlags, cancellationToken);
public static ValueTask<int> ReceiveAsync(this Socket socket, Memory<byte> memory, SocketFlags socketFlags, CancellationToken cancellationToken = default)
{
var tcs = new TaskCompletionSource<int>(socket);
socket.BeginReceive(memory.ToArray(), 0, memory.Length, socketFlags, iar =>
{
cancellationToken.ThrowIfCancellationRequested();
var tcsInner = (TaskCompletionSource<int>)iar.AsyncState;
var socketInner = (Socket)tcsInner.Task.AsyncState;
try { tcsInner.TrySetResult(socketInner.EndReceive(iar)); }
catch (Exception exc) { tcsInner.TrySetException(exc); }
}, tcs);
cancellationToken.ThrowIfCancellationRequested();
return new ValueTask<int>(tcs.Task);
}
}
}
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