/// <summary>Cancels any asychronous operation that is currently active.</summary>
public IAsyncResult Cancel(IAsyncResult ar)
{
ProxyAsyncData async = (ProxyAsyncData)ar;
async.CancelPending = true;
return(async);
}
/// <summary>Complete an async connection</summary>
public TcpClient EndConnect(IAsyncResult ar)
{
ProxyAsyncData async = (ProxyAsyncData)ar;
try
{
ar.AsyncWaitHandle.WaitOne();
if (async.Error != null)
{
throw async.Error; //throw new ProxyException(String.Format(CultureInfo.InvariantCulture, "Connection to proxy host {0} on port {1} failed.", Utils.GetHost(m_tcp_client), Utils.GetPort(m_tcp_client)), ex);
}
return(async.TcpClient);
}
finally
{
async.AsyncWaitHandle.Close();
}
}
/// <summary>Begin connecting asynchronously through the proxy server</summary>
public IAsyncResult BeginConnect(string destination_host, int destination_port)
{
// Execute the async operation
var async = new ProxyAsyncData();
ThreadPool.QueueUserWorkItem(x =>
{
try
{
// Connect to the proxy server
async.TcpClient.Connect(ProxyHostname, ProxyPort);
// Connect through to the remote host
DoConnect(async.TcpClient, destination_host, destination_port);
}
catch (Exception ex) { async.Error = ex; }
finally { ((ManualResetEvent)async.AsyncWaitHandle).Set(); }
}, async);
return(async);
}
