public SocksTunnel(SocksClient p, SocksRequest req, int packetSize)
{
RemoteClient = new TcpClient(new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp), _packetSize);
Client = p;
Req = req;
_packetSize = packetSize;
}
public static List <AuthTypes> RequestAuth(SocksClient client)
{
var buff = Receive(client.Client);
if (buff == null || (HeaderTypes)buff[0] != HeaderTypes.Socks5)
{
return(new List <AuthTypes>());
}
var methods = Convert.ToInt32(buff[1]);
var types = new List <AuthTypes>();
for (var i = 2; i < methods + 2; i++)
{
switch ((AuthTypes)buff[i])
{
case AuthTypes.Login:
types.Add(AuthTypes.Login);
break;
case AuthTypes.None:
types.Add(AuthTypes.None);
break;
}
}
return(types);
}
private void OnClientConnected(object sender, NewConnectionEventArgs e)
{
var client = new SocksClient(new TcpClient(e.Socket, PacketSize));
client.OnClientDisconnected += OnClientDisconnected;
client.OnClientAuthenticating += OnClientAuthenticating;
Clients.Add(client);
client.Authentication = Authentication;
client.Begin(PacketSize, Timeout);
}
public static SocksRequest RequestTunnel(SocksClient client)
{
var buff = Receive(client.Client);
if (buff == null || (HeaderTypes)buff[0] != HeaderTypes.Socks5)
{
return(null);
}
switch ((StreamTypes)buff[1])
{
case StreamTypes.Stream:
var fwd = 4;
var address = string.Empty;
switch ((AddressType)buff[3])
{
case AddressType.IP:
for (var i = 4; i < 8; i++)
{
address += Convert.ToInt32(buff[i]).ToString() + (i != 7 ? "." : "");
}
fwd += 4;
break;
case AddressType.Domain:
var domainlen = Convert.ToInt32(buff[4]);
address += Encoding.ASCII.GetString(buff, 5, domainlen);
fwd += domainlen + 1;
break;
case AddressType.IPv6:
//can't handle IPV6 traffic just yet.
return(null);
}
var po = new byte[2];
Array.Copy(buff, fwd, po, 0, 2);
var x = BitConverter.ToInt16(po, 0);
var port = Convert.ToInt32(IPAddress.NetworkToHostOrder(x));
port = (port < 1 ? port + 65536 : port);
return(new SocksRequest(StreamTypes.Stream, (AddressType)buff[3], address, port));
default:
//not supported.
return(null);
}
}
public static User RequestLogin(SocksClient client)
{
client.Client.Send(new[] { (byte)HeaderTypes.Socks5, (byte)HeaderTypes.Authentication });
var buff = Receive(client.Client);
if (buff == null || buff[0] != 0x01)
{
return(null);
}
var numusername = Convert.ToInt32(buff[1]);
var numpassword = Convert.ToInt32(buff[(numusername + 2)]);
var username = Encoding.ASCII.GetString(buff, 2, numusername);
var password = Encoding.ASCII.GetString(buff, numusername + 3, numpassword);
return(new User(username, password, (IPEndPoint)client.Client.Sock.RemoteEndPoint));
}
