public SocksTunnel(SocksClient p, SocksRequest req, int packetSize, int timeout)
{
RemoteClient = new Client(new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp), PacketSize);
Client = p;
Req = req;
PacketSize = packetSize;
Timeout = timeout;
}
void _server_onClientConnected(object sender, ClientEventArgs e)
{
Console.WriteLine("Client connected.");
SocksClient client = new SocksClient(e.Client);
client.onClientDisconnected += client_onClientDisconnected;
client.OnClientAuthenticating += client_OnClientAuthenticating;
Clients.Add(client);
client.Authentication = this.Authentication;
client.Begin(this.PacketSize, this.Timeout);
}
public static User RequestLogin(SocksClient client)
{
//request authentication.
client.Client.Send(new byte[] { (byte)HeaderTypes.Socks5, (byte)HeaderTypes.Authentication });
byte[] buff = Receive(client.Client);
if (buff == null || buff[0] != 0x01) return null;
int numusername = Convert.ToInt32(buff[1]);
int numpassword = Convert.ToInt32(buff[(numusername + 2)]);
string username = Encoding.ASCII.GetString(buff, 2, numusername);
string password = Encoding.ASCII.GetString(buff, numusername + 3, numpassword);
return new User(username, password, (IPEndPoint)client.Client.Sock.RemoteEndPoint);
}
public static SocksRequest RequestTunnel(SocksClient client)
{
byte[] buff = Receive(client.Client);
if (buff == null || (HeaderTypes)buff[0] != HeaderTypes.Socks5) return null;
switch ((StreamTypes)buff[1])
{
case StreamTypes.Stream:
{
int fwd = 4;
string address = "";
switch ((AddressType)buff[3])
{
case AddressType.IP:
{
for (int i = 4; i < 8; i++)
{
//grab IP.
address += Convert.ToInt32(buff[i]).ToString() + (i != 7 ? "." : "");
}
fwd += 4;
}
break;
case AddressType.Domain:
{
int 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;
}
byte[] po = new byte[2];
Array.Copy(buff, fwd, po, 0, 2);
Int16 x = BitConverter.ToInt16(po, 0);
int 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 List<AuthTypes> RequestAuth(SocksClient client)
{
byte[] buff = Receive(client.Client);
if (buff == null || (HeaderTypes)buff[0] != HeaderTypes.Socks5) return new List<AuthTypes>();
int methods = Convert.ToInt32(buff[1]);
List<AuthTypes> types = new List<AuthTypes>();
for (int 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;
}
public SocksClientEventArgs(SocksClient client)
{
Client = client;
}