wintun: Resolve some of golint warnings
Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
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a1aabb21ae
commit
1fdf7b19a3
@ -52,6 +52,10 @@ func packetAlign(size uint32) uint32 {
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return (size + (packetExchangeAlignment - 1)) &^ (packetExchangeAlignment - 1)
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}
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//
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// CreateTUN creates a Wintun adapter with the given name. Should a Wintun
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// adapter with the same name exist, it is reused.
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//
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func CreateTUN(ifname string) (TUNDevice, error) {
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// Does an interface with this name already exist?
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wt, err := wintun.GetInterface(ifname, 0)
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@ -351,6 +355,9 @@ func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
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return len(buff) - offset, tun.flush()
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}
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//
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// GUID returns Windows adapter instance ID.
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//
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func (tun *NativeTun) GUID() windows.GUID {
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return *(*windows.GUID)(tun.wt)
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}
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@ -398,10 +398,10 @@ func SetupDiClassNameFromGuidEx(classGUID *windows.GUID, machineName string) (cl
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//sys setupDiClassGuidsFromNameEx(className *uint16, classGuidList *windows.GUID, classGuidListSize uint32, requiredSize *uint32, machineName *uint16, reserved uintptr) (err error) = setupapi.SetupDiClassGuidsFromNameExW
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// SetupDiClassGuidsFromNameEx function retrieves the GUIDs associated with the specified class name. This resulting list contains the classes currently installed on a local or remote computer.
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func SetupDiClassGuidsFromNameEx(className string, machineName string) (classGuidLists []windows.GUID, err error) {
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func SetupDiClassGuidsFromNameEx(className string, machineName string) ([]windows.GUID, error) {
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classNameUTF16, err := syscall.UTF16PtrFromString(className)
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if err != nil {
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return
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return nil, err
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}
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const bufCapacity = 4
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@ -412,7 +412,7 @@ func SetupDiClassGuidsFromNameEx(className string, machineName string) (classGui
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if machineName != "" {
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machineNameUTF16, err = syscall.UTF16PtrFromString(machineName)
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if err != nil {
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return
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return nil, err
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}
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}
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@ -431,7 +431,7 @@ func SetupDiClassGuidsFromNameEx(className string, machineName string) (classGui
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}
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}
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return
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return nil, err
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}
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//sys setupDiGetSelectedDevice(deviceInfoSet DevInfo, deviceInfoData *DevInfoData) (err error) = setupapi.SetupDiGetSelectedDevice
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@ -10,11 +10,11 @@ import (
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"syscall"
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"testing"
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"golang.zx2c4.com/wireguard/tun/wintun/guid"
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"golang.org/x/sys/windows"
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"golang.zx2c4.com/wireguard/tun/wintun/guid"
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)
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var deviceClassNetGUID = windows.GUID{0x4d36e972, 0xe325, 0x11ce, [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
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var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
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var computerName string
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func init() {
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@ -19,11 +19,14 @@ import (
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"golang.zx2c4.com/wireguard/tun/wintun/setupapi"
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)
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//
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// Wintun is a handle of a Wintun adapter
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//
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type Wintun windows.GUID
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var deviceClassNetGUID = windows.GUID{0x4d36e972, 0xe325, 0x11ce, [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
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var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
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const TUN_HWID = "Wintun"
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const hardwareID = "Wintun"
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//
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// GetInterface finds interface ID by name.
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@ -66,7 +69,7 @@ func GetInterface(ifname string, hwndParent uintptr) (*Wintun, error) {
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}
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// Get interface ID.
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ifid, err := getInterfaceId(devInfoList, deviceData, 1)
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ifid, err := getInterfaceID(devInfoList, deviceData, 1)
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if err != nil {
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// Something is wrong with this device. Skip it.
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continue
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@ -106,7 +109,7 @@ func GetInterface(ifname string, hwndParent uintptr) (*Wintun, error) {
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continue
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}
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if driverDetailData.IsCompatible(TUN_HWID) {
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if driverDetailData.IsCompatible(hardwareID) {
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// Matching hardware ID found.
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return (*Wintun)(ifid), nil
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}
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@ -160,7 +163,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
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}
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// Set Plug&Play device hardware ID property.
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hwid, err := syscall.UTF16FromString(TUN_HWID)
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hwid, err := syscall.UTF16FromString(hardwareID)
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if err != nil {
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return nil, false, err
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}
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@ -199,7 +202,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
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continue
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}
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if driverDetailData.IsCompatible(TUN_HWID) {
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if driverDetailData.IsCompatible(hardwareID) {
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// Matching hardware ID found. Select the driver.
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err := devInfoList.SetSelectedDriver(deviceData, driverData)
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if err != nil {
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@ -214,7 +217,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
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}
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if driverVersion == 0 {
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return nil, false, fmt.Errorf("No driver for device \"%v\" installed", TUN_HWID)
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return nil, false, fmt.Errorf("No driver for device \"%v\" installed", hardwareID)
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}
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// Call appropriate class installer.
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@ -241,7 +244,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
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}
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// Get network interface ID from registry. Retry for max 30sec.
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ifid, err = getInterfaceId(devInfoList, deviceData, 30)
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ifid, err = getInterfaceID(devInfoList, deviceData, 30)
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}
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if err == nil {
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@ -302,7 +305,7 @@ func (wintun *Wintun) DeleteInterface(hwndParent uintptr) (bool, bool, error) {
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}
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// Get interface ID.
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ifid2, err := getInterfaceId(devInfoList, deviceData, 1)
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ifid2, err := getInterfaceID(devInfoList, deviceData, 1)
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if err != nil {
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// Something is wrong with this device. Skip it.
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continue
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@ -364,7 +367,7 @@ func checkReboot(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInf
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return false, nil
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}
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// getInterfaceId returns network interface ID.
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// getInterfaceID returns network interface ID.
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//
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// After the device is created, it might take some time before the registry
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// key is populated. numAttempts parameter specifies the number of attempts
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@ -373,7 +376,7 @@ func checkReboot(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInf
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//
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// Function returns the network interface ID.
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//
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func getInterfaceId(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData, numAttempts int) (*windows.GUID, error) {
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func getInterfaceID(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData, numAttempts int) (*windows.GUID, error) {
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if numAttempts < 1 {
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return nil, fmt.Errorf("Invalid numAttempts (expected: >=1, provided: %v)", numAttempts)
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}
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@ -481,10 +484,16 @@ func getRegStringValue(key registry.Key, name string) (string, error) {
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return valueExp, nil
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}
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//
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// SignalEventName returns Wintun device data-ready event name.
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//
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func (wintun *Wintun) SignalEventName() string {
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return fmt.Sprintf("Global\\WINTUN_EVENT_%s", guid.ToString((*windows.GUID)(wintun)))
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}
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//
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// DataFileName returns Wintun device data pipe name.
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//
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func (wintun *Wintun) DataFileName() string {
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return fmt.Sprintf("\\\\.\\Global\\WINTUN_DEVICE_%s", guid.ToString((*windows.GUID)(wintun)))
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}
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