Esempio n. 1
0
func (v *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output buf.Writer, finish *sync.Mutex) {
	defer finish.Unlock()

	reader := bufio.NewReader(conn)
	defer reader.Release()

	header, err := session.DecodeResponseHeader(reader)
	if err != nil {
		conn.SetReusable(false)
		log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
		return
	}
	v.handleCommand(dest, header.Command)

	conn.SetReusable(header.Option.Has(protocol.ResponseOptionConnectionReuse))

	reader.SetCached(false)
	bodyReader := session.DecodeResponseBody(request, reader)
	defer bodyReader.Release()

	if err := buf.PipeUntilEOF(bodyReader, output); err != nil {
		conn.SetReusable(false)
	}

	return
}
Esempio n. 2
0
func (this *VMessOutboundHandler) handleResponse(session *encoding.ClientSession, conn internet.Connection, request *protocol.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
	defer finish.Unlock()

	reader := v2io.NewBufferedReader(conn)
	defer reader.Release()

	header, err := session.DecodeResponseHeader(reader)
	if err != nil {
		conn.SetReusable(false)
		log.Warning("VMess|Outbound: Failed to read response from ", request.Destination(), ": ", err)
		return
	}
	go this.handleCommand(dest, header.Command)

	if !header.Option.Has(protocol.ResponseOptionConnectionReuse) {
		conn.SetReusable(false)
	}

	reader.SetCached(false)
	decryptReader := session.DecodeResponseBody(reader)

	var bodyReader v2io.Reader
	if request.Option.Has(protocol.RequestOptionChunkStream) {
		bodyReader = vmessio.NewAuthChunkReader(decryptReader)
	} else {
		bodyReader = v2io.NewAdaptiveReader(decryptReader)
	}

	err = v2io.Pipe(bodyReader, output)
	if err != io.EOF {
		conn.SetReusable(false)
	}

	bodyReader.Release()

	return
}
Esempio n. 3
0
func (s *ServerSession) Handshake(reader io.Reader, writer io.Writer) (*protocol.RequestHeader, error) {
	buffer := buf.NewLocal(512)
	request := new(protocol.RequestHeader)

	if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 2)); err != nil {
		return nil, errors.Base(err).Message("Socks|Server: Insufficient header.")
	}

	version := buffer.Byte(0)
	if version == socks4Version {
		if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 6)); err != nil {
			return nil, errors.Base(err).Message("Socks|Server: Insufficient header.")
		}
		port := v2net.PortFromBytes(buffer.BytesRange(2, 4))
		address := v2net.IPAddress(buffer.BytesRange(4, 8))
		_, err := readUntilNull(reader) // user id
		if err != nil {
			return nil, err
		}
		if address.IP()[0] == 0x00 {
			domain, err := readUntilNull(reader)
			if err != nil {
				return nil, errors.Base(err).Message("Socks|Server: Failed to read domain for socks 4a.")
			}
			address = v2net.DomainAddress(domain)
		}

		switch buffer.Byte(1) {
		case cmdTCPConnect:
			request.Command = protocol.RequestCommandTCP
			request.Address = address
			request.Port = port
			request.Version = socks4Version
			if err := writeSocks4Response(writer, socks4RequestGranted, v2net.AnyIP, v2net.Port(0)); err != nil {
				return nil, err
			}
			return request, nil
		default:
			writeSocks4Response(writer, socks4RequestRejected, v2net.AnyIP, v2net.Port(0))
			return nil, errors.New("Socks|Server: Unsupported command: ", buffer.Byte(1))
		}
	}

	if version == socks5Version {
		nMethod := int(buffer.Byte(1))
		if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, nMethod)); err != nil {
			return nil, err
		}

		var expectedAuth byte = authNotRequired
		if s.config.AuthType == AuthType_PASSWORD {
			expectedAuth = authPassword
		}

		if !hasAuthMethod(expectedAuth, buffer.BytesRange(2, 2+nMethod)) {
			writeSocks5AuthenticationResponse(writer, authNoMatchingMethod)
			return nil, errors.New("Socks|Server: No matching auth method.")
		}

		if err := writeSocks5AuthenticationResponse(writer, expectedAuth); err != nil {
			return nil, err
		}

		if expectedAuth == authPassword {
			username, password, err := readUsernamePassword(reader)
			if err != nil {
				return nil, errors.Base(err).Message("Socks|Server: Failed to read username and password for authentication.")
			}

			if !s.config.HasAccount(username, password) {
				writeSocks5AuthenticationResponse(writer, 0xFF)
				return nil, errors.New("Socks|Server: Invalid username or password.")
			}

			if err := writeSocks5AuthenticationResponse(writer, 0x00); err != nil {
				return nil, err
			}
		}
		buffer.Clear()
		if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 4)); err != nil {
			return nil, err
		}

		cmd := buffer.Byte(1)
		if cmd == cmdTCPBind || (cmd == cmdUDPPort && !s.config.UdpEnabled) {
			writeSocks5Response(writer, statusCmdNotSupport, v2net.AnyIP, v2net.Port(0))
			return nil, errors.New("Socks|Server: Unsupported command: ", cmd)
		}

		switch cmd {
		case cmdTCPConnect:
			request.Command = protocol.RequestCommandTCP
		case cmdUDPPort:
			request.Command = protocol.RequestCommandUDP
		}

		addrType := buffer.Byte(3)

		buffer.Clear()

		request.Version = socks5Version
		switch addrType {
		case addrTypeIPv4:
			if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 4)); err != nil {
				return nil, err
			}
			request.Address = v2net.IPAddress(buffer.Bytes())
		case addrTypeIPv6:
			if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 16)); err != nil {
				return nil, err
			}
			request.Address = v2net.IPAddress(buffer.Bytes())
		case addrTypeDomain:
			if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 1)); err != nil {
				return nil, err
			}
			domainLength := int(buffer.Byte(0))
			if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, domainLength)); err != nil {
				return nil, err
			}
			request.Address = v2net.DomainAddress(string(buffer.BytesFrom(-domainLength)))
		default:
			return nil, errors.New("Socks|Server: Unknown address type: ", addrType)
		}

		if err := buffer.AppendSupplier(buf.ReadFullFrom(reader, 2)); err != nil {
			return nil, err
		}
		request.Port = v2net.PortFromBytes(buffer.BytesFrom(-2))

		responseAddress := v2net.AnyIP
		responsePort := v2net.Port(1717)
		if request.Command == protocol.RequestCommandUDP {
			addr := s.config.Address.AsAddress()
			if addr == nil {
				addr = v2net.LocalHostIP
			}
			responseAddress = addr
			responsePort = s.port
		}
		if err := writeSocks5Response(writer, statusSuccess, responseAddress, responsePort); err != nil {
			return nil, err
		}

		return request, nil
	}

	return nil, errors.New("Socks|Server: Unknown Socks version: ", version)
}