public static async Task <SocksProxyReply> ReadReplyAsync(Stream s)
{
SocksProxyReply reply = new SocksProxyReply();
byte[] buffer = new byte[3];
await s.ReadBytesAsync(buffer, 0, 3);
reply._version = buffer[0];
reply._reply = (SocksProxyReplyCode)buffer[1];
reply._bindEP = await SocksProxyServer.ReadEndPointAsync(s);
return(reply);
}
private static async Task <EndPoint> RequestAsync(Stream s, SocksProxyRequest request)
{
await request.WriteToAsync(s);
await s.FlushAsync();
SocksProxyReply reply = await SocksProxyReply.ReadReplyAsync(s);
if (!reply.IsVersionSupported)
{
throw new SocksProxyException("Socks version 5 is not supported by the proxy server.");
}
if (reply.ReplyCode != SocksProxyReplyCode.Succeeded)
{
throw new SocksProxyException("Socks proxy server request failed: " + reply.ReplyCode.ToString(), reply.ReplyCode);
}
return(reply.BindEndPoint);
}
public async Task <Socket> AcceptAsync()
{
SocksProxyReply reply = await SocksProxyReply.ReadReplyAsync(new NetworkStream(_socket));
if (!reply.IsVersionSupported)
{
throw new SocksProxyException("Socks version 5 is not supported by the proxy server.");
}
if (reply.ReplyCode != SocksProxyReplyCode.Succeeded)
{
throw new SocksProxyException("Socks proxy server request failed: " + reply.ReplyCode.ToString(), reply.ReplyCode);
}
_remoteEP = reply.BindEndPoint;
Socket socket = _socket;
_socket = null; //prevent socket from getting disposed
return(socket);
}