/// <summary>
/// Begins an asynchronous request for a connection to a network device.
/// </summary>
/// <param name="remoteEP">An EndPoint that represents the remote device.</param>
/// <param name="callback">The AsyncCallback delegate.</param>
/// <param name="state">An object that contains state information for this request.</param>
/// <returns>An IAsyncResult that references the asynchronous connection.</returns>
/// <exception cref="ArgumentNullException">The remoteEP parameter is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="SocketException">An operating system error occurs while creating the Socket.</exception>
/// <exception cref="ObjectDisposedException">The Socket has been closed.</exception>
public new IAsyncResult BeginConnect(EndPoint remoteEP, AsyncCallback callback, object state)
{
if (remoteEP == null || callback == null)
{
throw new ArgumentNullException();
}
if (ProtocolType != ProtocolType.Tcp || ProxyType == ProxyTypes.None || ProxyEndPoint == null)
{
return(base.BeginConnect(remoteEP, callback, state));
}
else
{
CallBack = callback;
if (ProxyType == ProxyTypes.Socks4)
{
AsyncResult = new Socks4Handler(this, ProxyUser).BeginNegotiate((IPEndPoint)remoteEP,
OnHandShakeComplete,
ProxyEndPoint);
return(AsyncResult);
}
else if (ProxyType == ProxyTypes.Socks5)
{
AsyncResult = new Socks5Handler(this, ProxyUser, ProxyPass).BeginNegotiate((IPEndPoint)remoteEP,
OnHandShakeComplete,
ProxyEndPoint);
return(AsyncResult);
}
return(null);
}
}
public new IAsyncResult BeginConnect(string host, int port, AsyncCallback callback, object state)
{
if (host == null || callback == null)
{
throw new ArgumentNullException();
}
if (port <= 0 || port > 65535)
{
throw new ArgumentException();
}
CallBack = callback;
if (ProtocolType != ProtocolType.Tcp || ProxyType == ProxyTypes.None || ProxyEndPoint == null)
{
RemotePort = port;
AsyncResult = BeginDns(host, new HandShakeComplete(OnHandShakeComplete));
return(AsyncResult);
}
else
{
if (ProxyType == ProxyTypes.Socks4)
{
AsyncResult = new Socks4Handler(this, ProxyUser).BeginNegotiate(host, port, new HandShakeComplete(OnHandShakeComplete), ProxyEndPoint);
return(AsyncResult);
}
else if (ProxyType == ProxyTypes.Socks5)
{
AsyncResult = new Socks5Handler(this, ProxyUser, ProxyPass).BeginNegotiate(host, port, new HandShakeComplete(OnHandShakeComplete), ProxyEndPoint);
return(AsyncResult);
}
return(null);
}
}