// useNativeConsole determines if the docker client should use the built-in
// console which supports ANSI emulation, or fall-back to the golang emulator
// (github.com/azure/go-ansiterm).
func useNativeConsole() bool {
	osv := system.GetOSVersion()

	// Native console is not available before major version 10
	if osv.MajorVersion < 10 {
		return false
	}

	// Get the console modes. If this fails, we can't use the native console
	state, err := getNativeConsole()
	if err != nil {
		return false
	}

	// Probe the console to see if it can be enabled.
	if nil != probeNativeConsole(state) {
		return false
	}

	// Environment variable override
	if e := os.Getenv("USE_NATIVE_CONSOLE"); e != "" {
		if e == "1" {
			return true
		}
		return false
	}

	// Must have a post-TP5 RS1 build of Windows Server 2016/Windows 10 for
	// the native console to be usable.
	if osv.Build < 14350 {
		return false
	}

	return true
}

// useNativeConsole determines if the docker client should use the built-in
// console which supports ANSI emulation, or fall-back to the golang emulator
// (github.com/azure/go-ansiterm).
func useNativeConsole() bool {
	osv := system.GetOSVersion()

	// Native console is not available before major version 10
	if osv.MajorVersion < 10 {
		return false
	}

	// Get the console modes. If this fails, we can't use the native console
	state, err := getNativeConsole()
	if err != nil {
		return false
	}

	// Probe the console to see if it can be enabled.
	if nil != probeNativeConsole(state) {
		return false
	}

	// Environment variable override
	if e := os.Getenv("USE_NATIVE_CONSOLE"); e != "" {
		if e == "1" {
			return true
		}
		return false
	}

	// TODO Windows. The native emulator still has issues which
	// mean it shouldn't be enabled for everyone. Change this next line to true
	// to change the default to "enable if available". In the meantime, users
	// can still try it out by using USE_NATIVE_CONSOLE env variable.
	return false
}

// checkSystem validates platform-specific requirements
func checkSystem() error {
	// Validate the OS version. Note that docker.exe must be manifested for this
	// call to return the correct version.
	osv := system.GetOSVersion()
	if osv.MajorVersion < 10 {
		return fmt.Errorf("This version of Windows does not support the docker daemon")
	}
	if osv.Build < 14300 {
		return fmt.Errorf("The Windows daemon requires Windows Server 2016 Technical Preview 5 build 14300 or later")
	}
	return nil
}

func init() {
	osv := system.GetOSVersion()
	// Read-only volumes supported from 14350 onwards (post Windows Server 2016 TP5)
	// Mode (optional):
	//    -  Hopefully self explanatory in comparison to above regex's.
	//    -  Colon is not in the capture group
	if osv.Build >= 14350 {
		RXMode = `(:(?P<mode>(?i)ro|rw))?`
	} else {
		RXMode = `(:(?P<mode>(?i)rw))?`
	}
}

// checkSystem validates platform-specific requirements
func checkSystem() error {
	// Validate the OS version. Note that docker.exe must be manifested for this
	// call to return the correct version.
	osv, err := system.GetOSVersion()
	if err != nil {
		return err
	}
	if osv.MajorVersion < 10 {
		return fmt.Errorf("This version of Windows does not support the docker daemon")
	}
	return nil
}

// useNativeConsole determines if the docker client should use the built-in
// console which supports ANSI emulation, or fall-back to the golang emulator
// (github.com/azure/go-ansiterm).
func useNativeConsole() bool {
	osv, err := system.GetOSVersion()
	if err != nil {
		return false
	}

	// Native console is not available major version 10
	if osv.MajorVersion < 10 {
		return false
	}

	// Must have a late pre-release TP4 build of Windows Server 2016/Windows 10 TH2 or later
	if osv.Build < 10578 {
		return false
	}

	// Environment variable override
	if e := os.Getenv("USE_NATIVE_CONSOLE"); e != "" {
		if e == "1" {
			return true
		}
		return false
	}

	// Get the handle to stdout
	stdOutHandle, err := syscall.GetStdHandle(syscall.STD_OUTPUT_HANDLE)
	if err != nil {
		return false
	}

	// Get the console mode from the consoles stdout handle
	var mode uint32
	if err := syscall.GetConsoleMode(stdOutHandle, &mode); err != nil {
		return false
	}

	// Legacy mode does not have native ANSI emulation.
	// https://msdn.microsoft.com/en-us/library/windows/desktop/ms683167(v=vs.85).aspx
	const enableVirtualTerminalProcessing = 0x0004
	if mode&enableVirtualTerminalProcessing == 0 {
		return false
	}

	// TODO Windows (Post TP4). The native emulator still has issues which
	// mean it shouldn't be enabled for everyone. Change this next line to true
	// to change the default to "enable if available". In the meantime, users
	// can still try it out by using USE_NATIVE_CONSOLE env variable.
	return false
}

// checkSystem validates platform-specific requirements
func checkSystem() error {
	// Validate the OS version. Note that docker.exe must be manifested for this
	// call to return the correct version.
	osv := system.GetOSVersion()
	if osv.MajorVersion < 10 {
		return fmt.Errorf("This version of Windows does not support the docker daemon")
	}
	if osv.Build < 14393 {
		return fmt.Errorf("The docker daemon requires build 14393 or later of Windows Server 2016 or Windows 10")
	}

	vmcompute := windows.NewLazySystemDLL("vmcompute.dll")
	if vmcompute.Load() != nil {
		return fmt.Errorf("Failed to load vmcompute.dll. Ensure that the Containers role is installed.")
	}
	return nil
}

func initBridgeDriver(controller libnetwork.NetworkController, config *Config) error {
	if _, err := controller.NetworkByName(runconfig.DefaultDaemonNetworkMode().NetworkName()); err == nil {
		return nil
	}

	netOption := map[string]string{
		winlibnetwork.NetworkName: runconfig.DefaultDaemonNetworkMode().NetworkName(),
	}

	var ipamOption libnetwork.NetworkOption
	var subnetPrefix string

	if config.bridgeConfig.FixedCIDR != "" {
		subnetPrefix = config.bridgeConfig.FixedCIDR
	} else {
		// TP5 doesn't support properly detecting subnet
		osv := system.GetOSVersion()
		if osv.Build < 14360 {
			subnetPrefix = defaultNetworkSpace
		}
	}

	if subnetPrefix != "" {
		ipamV4Conf := libnetwork.IpamConf{}
		ipamV4Conf.PreferredPool = subnetPrefix
		v4Conf := []*libnetwork.IpamConf{&ipamV4Conf}
		v6Conf := []*libnetwork.IpamConf{}
		ipamOption = libnetwork.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil)
	}

	_, err := controller.NewNetwork(string(runconfig.DefaultDaemonNetworkMode()), runconfig.DefaultDaemonNetworkMode().NetworkName(), "",
		libnetwork.NetworkOptionGeneric(options.Generic{
			netlabel.GenericData: netOption,
		}),
		ipamOption,
	)

	if err != nil {
		return fmt.Errorf("Error creating default network: %v", err)
	}

	return nil
}

// fixStdinBackspaceBehavior works around a bug in Windows before build 14350
// where it interpreted DEL as VK_DELETE instead of as VK_BACK. This replaces
// DEL with BS to work around this.
func fixStdinBackspaceBehavior(w io.WriteCloser, tty bool) io.WriteCloser {
	if !tty || system.GetOSVersion().Build >= 14350 {
		return w
	}
	return &delToBsWriter{w}
}

func isTP5OrOlder() bool {
	return system.GetOSVersion().Build <= 14300
}

func (daemon *Daemon) initNetworkController(config *Config) (libnetwork.NetworkController, error) {
	// TODO Windows: Remove this check once TP4 is no longer supported
	osv, err := system.GetOSVersion()
	if err != nil {
		return nil, err
	}

	if osv.Build < 14260 {
		// Set the name of the virtual switch if not specified by -b on daemon start
		if config.bridgeConfig.Iface == "" {
			config.bridgeConfig.Iface = defaultVirtualSwitch
		}
		logrus.Warnf("Network controller is not supported by the current platform build version")
		return nil, nil
	}

	netOptions, err := daemon.networkOptions(config)
	if err != nil {
		return nil, err
	}
	controller, err := libnetwork.New(netOptions...)
	if err != nil {
		return nil, fmt.Errorf("error obtaining controller instance: %v", err)
	}

	hnsresponse, err := hcsshim.HNSListNetworkRequest("GET", "", "")
	if err != nil {
		return nil, err
	}

	// Remove networks not present in HNS
	for _, v := range controller.Networks() {
		options := v.Info().DriverOptions()
		hnsid := options[winlibnetwork.HNSID]
		found := false

		for _, v := range hnsresponse {
			if v.Id == hnsid {
				found = true
				break
			}
		}

		if !found {
			err = v.Delete()
			if err != nil {
				return nil, err
			}
		}
	}

	_, err = controller.NewNetwork("null", "none", libnetwork.NetworkOptionPersist(false))
	if err != nil {
		return nil, err
	}

	// discover and add HNS networks to windows
	// network that exist are removed and added again
	for _, v := range hnsresponse {
		var n libnetwork.Network
		s := func(current libnetwork.Network) bool {
			options := current.Info().DriverOptions()
			if options[winlibnetwork.HNSID] == v.Id {
				n = current
				return true
			}
			return false
		}

		controller.WalkNetworks(s)
		if n != nil {
			v.Name = n.Name()
			n.Delete()
		}

		netOption := map[string]string{
			winlibnetwork.NetworkName: v.Name,
			winlibnetwork.HNSID:       v.Id,
		}

		v4Conf := []*libnetwork.IpamConf{}
		for _, subnet := range v.Subnets {
			ipamV4Conf := libnetwork.IpamConf{}
			ipamV4Conf.PreferredPool = subnet.AddressPrefix
			ipamV4Conf.Gateway = subnet.GatewayAddress
			v4Conf = append(v4Conf, &ipamV4Conf)
		}

		name := v.Name
		// There is only one nat network supported in windows.
		// If it exists with a different name add it as the default name
		if runconfig.DefaultDaemonNetworkMode() == containertypes.NetworkMode(strings.ToLower(v.Type)) {
			name = runconfig.DefaultDaemonNetworkMode().NetworkName()
		}

		v6Conf := []*libnetwork.IpamConf{}
		_, err := controller.NewNetwork(strings.ToLower(v.Type), name,
			libnetwork.NetworkOptionGeneric(options.Generic{
				netlabel.GenericData: netOption,
			}),
//.........这里部分代码省略.........

func getOSVersion() string {
	v := system.GetOSVersion()
	return fmt.Sprintf("%d.%d.%d", v.MajorVersion, v.MinorVersion, v.Build)
}