SharpCifs.Smb.SmbTransport.Ssn139 C# (CSharp) Method

Ssn139() private method

private Ssn139 ( ) : void
return void
        internal virtual void Ssn139()
        {
            Name calledName = new Name(Address.FirstCalledName(), 0x20, null
                );
            do
            {
                Socket = new SocketEx(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                if (LocalAddr != null)
                {
                    Socket.Bind2(new IPEndPoint(LocalAddr, LocalPort));
                }

                Socket.Connect(new IPEndPoint(IPAddress.Parse(Address.GetHostAddress()), 139), SmbConstants.ConnTimeout);
                Socket.SoTimeOut = SmbConstants.SoTimeout;

                Out = Socket.GetOutputStream();
                In = Socket.GetInputStream();
                SessionServicePacket ssp = new SessionRequestPacket(calledName, NbtAddress.GetLocalName
                    ());
                Out.Write(Sbuf, 0, ssp.WriteWireFormat(Sbuf, 0));
                if (Readn(In, Sbuf, 0, 4) < 4)
                {
                    try
                    {
                        Socket.Close();
                    }
                    catch (IOException)
                    {
                    }
                    throw new SmbException("EOF during NetBIOS session request");
                }
                switch (Sbuf[0] & 0xFF)
                {
                    case SessionServicePacket.PositiveSessionResponse:
                        {
                            if (Log.Level >= 4)
                            {
                                Log.WriteLine("session established ok with " + Address);
                            }
                            return;
                        }

                    case SessionServicePacket.NegativeSessionResponse:
                        {
                            int errorCode = In.Read() & 0xFF;
                            switch (errorCode)
                            {
                                case NbtException.CalledNotPresent:
                                case NbtException.NotListeningCalled:
                                    {
                                        Socket.Close();
                                        break;
                                    }

                                default:
                                    {
                                        Disconnect(true);
                                        throw new NbtException(NbtException.ErrSsnSrvc, errorCode);
                                    }
                            }
                            break;
                        }

                    case -1:
                        {
                            Disconnect(true);
                            throw new NbtException(NbtException.ErrSsnSrvc, NbtException.ConnectionRefused
                                );
                        }

                    default:
                        {
                            Disconnect(true);
                            throw new NbtException(NbtException.ErrSsnSrvc, 0);
                        }
                }
            }
            while ((calledName.name = Address.NextCalledName()) != null);
            throw new IOException("Failed to establish session with " + Address);
        }