public int UdpReceiveFrom(EndPoint remoteEP, byte[] request, int requestOffset, int requestCount, byte[] response, int responseOffset = 0, int timeout = 10000)
{
switch (_type)
{
case NetProxyType.Socks5:
if (_viaProxy != null)
{
throw new NotSupportedException("Cannot chain proxies for SOCKS5 Udp protocol.");
}
using (SocksUdpAssociateRequestHandler proxyUdpRequestHandler = _socksProxy.UdpAssociate(timeout))
{
proxyUdpRequestHandler.ReceiveTimeout = timeout;
//send request
proxyUdpRequestHandler.SendTo(request, requestOffset, requestCount, remoteEP);
//receive request
return(proxyUdpRequestHandler.ReceiveFrom(response, responseOffset, response.Length - responseOffset, out EndPoint ep));
}
default:
throw new NotSupportedException("Proxy type not supported.");
}
}
public int UdpReceiveFrom(EndPoint remoteEP, byte[] request, int requestOffset, int requestSize, byte[] response, int responseOffset, int timeout = 10000)
{
if (IsProxyBypassed(remoteEP))
{
IPEndPoint hostEP = remoteEP.GetIPEndPoint();
using (Socket socket = new Socket(hostEP.AddressFamily, SocketType.Dgram, ProtocolType.Udp))
{
socket.ReceiveTimeout = timeout;
//send request
socket.SendTo(request, requestOffset, requestSize, SocketFlags.None, hostEP);
//receive request
EndPoint ep;
if (hostEP.AddressFamily == AddressFamily.InterNetworkV6)
{
ep = new IPEndPoint(IPAddress.IPv6Any, 0);
}
else
{
ep = new IPEndPoint(IPAddress.Any, 0);
}
int bytesReceived;
do
{
bytesReceived = socket.ReceiveFrom(response, responseOffset, response.Length, SocketFlags.None, ref ep);
}while (!hostEP.Equals(ep));
return(bytesReceived);
}
}
switch (_type)
{
case NetProxyType.Socks5:
if (_viaProxy != null)
{
throw new NotSupportedException("Cannot chain proxies for SOCKS5 Udp protocol.");
}
using (SocksUdpAssociateRequestHandler proxyUdpRequestHandler = _socksProxy.UdpAssociate(timeout))
{
proxyUdpRequestHandler.ReceiveTimeout = timeout;
//send request
proxyUdpRequestHandler.SendTo(request, requestOffset, requestSize, remoteEP);
//receive request
return(proxyUdpRequestHandler.ReceiveFrom(response, responseOffset, response.Length - responseOffset, out EndPoint ep));
}
default:
throw new NotSupportedException("Proxy type not supported.");
}
}
public bool IsUdpAvailable()
{
if (_isUdpAvailableChecked)
{
return(_isUdpAvailable);
}
switch (_type)
{
case NetProxyType.Http:
_isUdpAvailable = false;
break;
case NetProxyType.Socks5:
SocksUdpAssociateRequestHandler udpHandler = null;
try
{
udpHandler = _socksProxy.UdpAssociate();
_isUdpAvailable = true;
}
catch (SocksClientException ex)
{
if (ex.ReplyCode == SocksReplyCode.CommandNotSupported)
{
_isUdpAvailable = false;
}
else
{
throw;
}
}
finally
{
if (udpHandler != null)
{
udpHandler.Dispose();
}
}
break;
default:
throw new NotSupportedException("Proxy type not supported.");
}
_isUdpAvailableChecked = true;
return(_isUdpAvailable);
}