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using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using System.Xml.Linq;
namespace MediaBrowser.Dlna.Ssdp
{
public static class Extensions
{
public static Task<int> ReceiveAsync(this Socket socket, byte[] buffer, int offset, int size)
{
var tcs = new TaskCompletionSource<int>(socket);
var remoteip = new IPEndPoint(IPAddress.Any, 0);
var endpoint = (EndPoint)remoteip;
socket.BeginReceiveFrom(buffer, offset, size, SocketFlags.None, ref endpoint, iar =>
{
var result = (TaskCompletionSource<int>)iar.AsyncState;
var iarSocket = (Socket)result.Task.AsyncState;
try
{
result.TrySetResult(iarSocket.EndReceive(iar));
}
catch (Exception exc)
{
result.TrySetException(exc);
}
}, tcs);
return tcs.Task;
}
public static string GetValue(this XElement container, XName name)
{
var node = container.Element(name);
return node == null ? null : node.Value;
}
public static string GetAttributeValue(this XElement container, XName name)
{
var node = container.Attribute(name);
return node == null ? null : node.Value;
}
public static string GetDescendantValue(this XElement container, XName name)
{
var node = container.Descendants(name)
.FirstOrDefault();
return node == null ? null : node.Value;
}
}
}
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