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wintun: make certain methods private

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This commit is contained in:
Jason A. Donenfeld 2019-05-17 14:26:46 +02:00
parent 583ebe99f1
commit 95c70b8032
2 changed files with 41 additions and 33 deletions
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13
tun/tun_windows.go
View file

@ -367,16 +367,9 @@ func (tun *NativeTun) Write(buff []byte, offset int) (int, error) {
return len(buff) - offset, nil return len(buff) - offset, nil
} }
// ///
// GUID returns Windows adapter instance ID. // LUID returns Windows adapter instance ID.
//
func (tun *NativeTun) GUID() windows.GUID {
return tun.wt.CfgInstanceID
}
//
// GUID returns Windows adapter instance ID.
// //
func (tun *NativeTun) LUID() uint64 { func (tun *NativeTun) LUID() uint64 {
return ((uint64(tun.wt.LUIDIndex) & ((1 << 24) - 1)) << 24) | ((uint64(tun.wt.IfType) & ((1 << 16) - 1)) << 48) return tun.wt.LUID()
} }

61
tun/wintun/wintun_windows.go
View file

@ -15,6 +15,7 @@ import (
"golang.org/x/sys/windows" "golang.org/x/sys/windows"
"golang.org/x/sys/windows/registry" "golang.org/x/sys/windows/registry"
"golang.zx2c4.com/wireguard/tun/wintun/guid" "golang.zx2c4.com/wireguard/tun/wintun/guid"
"golang.zx2c4.com/wireguard/tun/wintun/netshell" "golang.zx2c4.com/wireguard/tun/wintun/netshell"
registryEx "golang.zx2c4.com/wireguard/tun/wintun/registry" registryEx "golang.zx2c4.com/wireguard/tun/wintun/registry"
@ -25,9 +26,9 @@ import (
// Wintun is a handle of a Wintun adapter // Wintun is a handle of a Wintun adapter
// //
type Wintun struct { type Wintun struct {
CfgInstanceID windows.GUID cfgInstanceID windows.GUID
LUIDIndex uint32 luidIndex uint32
IfType uint32 ifType uint32
} }
var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}} var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0x11ce, Data4: [8]byte{0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}}
@ -73,9 +74,9 @@ func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfo
} }
return &Wintun{ return &Wintun{
CfgInstanceID: *ifid, cfgInstanceID: *ifid,
LUIDIndex: uint32(luidIdx), luidIndex: uint32(luidIdx),
IfType: uint32(ifType), ifType: uint32(ifType),
}, nil }, nil
} }
@ -326,7 +327,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
// Wait for network registry key to emerge and populate. // Wait for network registry key to emerge and populate.
key, err = registryEx.OpenKeyWait( key, err = registryEx.OpenKeyWait(
registry.LOCAL_MACHINE, registry.LOCAL_MACHINE,
wintun.GetNetRegKeyName(), wintun.netRegKeyName(),
registry.QUERY_VALUE|registry.NOTIFY, registry.QUERY_VALUE|registry.NOTIFY,
waitForRegistryTimeout) waitForRegistryTimeout)
if err == nil { if err == nil {
@ -339,7 +340,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
// Wait for TCP/IP adapter registry key to emerge and populate. // Wait for TCP/IP adapter registry key to emerge and populate.
key, err = registryEx.OpenKeyWait( key, err = registryEx.OpenKeyWait(
registry.LOCAL_MACHINE, registry.LOCAL_MACHINE,
wintun.GetTcpipAdapterRegKeyName(), registry.QUERY_VALUE|registry.NOTIFY, wintun.tcpipAdapterRegKeyName(), registry.QUERY_VALUE|registry.NOTIFY,
waitForRegistryTimeout) waitForRegistryTimeout)
if err == nil { if err == nil {
_, err = registryEx.GetStringValueWait(key, "IpConfig", waitForRegistryTimeout) _, err = registryEx.GetStringValueWait(key, "IpConfig", waitForRegistryTimeout)
@ -349,7 +350,7 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
var tcpipInterfaceRegKeyName string var tcpipInterfaceRegKeyName string
if err == nil { if err == nil {
tcpipInterfaceRegKeyName, err = wintun.GetTcpipInterfaceRegKeyName() tcpipInterfaceRegKeyName, err = wintun.tcpipInterfaceRegKeyName()
if err == nil { if err == nil {
// Wait for TCP/IP interface registry key to emerge. // Wait for TCP/IP interface registry key to emerge.
key, err = registryEx.OpenKeyWait( key, err = registryEx.OpenKeyWait(
@ -438,7 +439,7 @@ func (wintun *Wintun) DeleteInterface(hwndParent uintptr) (bool, bool, error) {
continue continue
} }
if wintun.CfgInstanceID == wintun2.CfgInstanceID { if wintun.cfgInstanceID == wintun2.cfgInstanceID {
// Remove the device. // Remove the device.
removeDeviceParams := setupapi.RemoveDeviceParams{ removeDeviceParams := setupapi.RemoveDeviceParams{
ClassInstallHeader: *setupapi.MakeClassInstallHeader(setupapi.DIF_REMOVE), ClassInstallHeader: *setupapi.MakeClassInstallHeader(setupapi.DIF_REMOVE),
@ -498,7 +499,7 @@ func checkReboot(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInf
// GetInterfaceName returns network interface name. // GetInterfaceName returns network interface name.
// //
func (wintun *Wintun) GetInterfaceName() (string, error) { func (wintun *Wintun) GetInterfaceName() (string, error) {
key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.QUERY_VALUE) key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.netRegKeyName(), registry.QUERY_VALUE)
if err != nil { if err != nil {
return "", fmt.Errorf("Network-specific registry key open failed: %v", err) return "", fmt.Errorf("Network-specific registry key open failed: %v", err)
} }
@ -517,10 +518,10 @@ func (wintun *Wintun) SetInterfaceName(ifname string) error {
// separate thread. // separate thread.
// TODO: netsh.exe falls back to NciSetConnection in this case. If somebody complains, maybe // TODO: netsh.exe falls back to NciSetConnection in this case. If somebody complains, maybe
// we should do the same. // we should do the same.
go netshell.HrRenameConnection(&wintun.CfgInstanceID, windows.StringToUTF16Ptr(ifname)) go netshell.HrRenameConnection(&wintun.cfgInstanceID, windows.StringToUTF16Ptr(ifname))
// Set the interface name. The above line should have done this too, but in case it failed, we force it. // Set the interface name. The above line should have done this too, but in case it failed, we force it.
key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.SET_VALUE) key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.netRegKeyName(), registry.SET_VALUE)
if err != nil { if err != nil {
return fmt.Errorf("Network-specific registry key open failed: %v", err) return fmt.Errorf("Network-specific registry key open failed: %v", err)
} }
@ -529,24 +530,24 @@ func (wintun *Wintun) SetInterfaceName(ifname string) error {
} }
// //
// GetNetRegKeyName returns interface-specific network registry key name. // netRegKeyName returns interface-specific network registry key name.
// //
func (wintun *Wintun) GetNetRegKeyName() string { func (wintun *Wintun) netRegKeyName() string {
return fmt.Sprintf("SYSTEM\\CurrentControlSet\\Control\\Network\\%s\\%s\\Connection", guid.ToString(&deviceClassNetGUID), guid.ToString(&wintun.CfgInstanceID)) return fmt.Sprintf("SYSTEM\\CurrentControlSet\\Control\\Network\\%s\\%s\\Connection", guid.ToString(&deviceClassNetGUID), guid.ToString(&wintun.cfgInstanceID))
} }
// //
// GetTcpipAdapterRegKeyName returns adapter-specific TCP/IP network registry key name. // tcpipAdapterRegKeyName returns adapter-specific TCP/IP network registry key name.
// //
func (wintun *Wintun) GetTcpipAdapterRegKeyName() string { func (wintun *Wintun) tcpipAdapterRegKeyName() string {
return fmt.Sprintf("SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Adapters\\%s", guid.ToString(&wintun.CfgInstanceID)) return fmt.Sprintf("SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Adapters\\%s", guid.ToString(&wintun.cfgInstanceID))
} }
// //
// GetTcpipInterfaceRegKeyName returns interface-specific TCP/IP network registry key name. // tcpipInterfaceRegKeyName returns interface-specific TCP/IP network registry key name.
// //
func (wintun *Wintun) GetTcpipInterfaceRegKeyName() (path string, err error) { func (wintun *Wintun) tcpipInterfaceRegKeyName() (path string, err error) {
key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetTcpipAdapterRegKeyName(), registry.QUERY_VALUE) key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.tcpipAdapterRegKeyName(), registry.QUERY_VALUE)
if err != nil { if err != nil {
return "", fmt.Errorf("Error opening adapter-specific TCP/IP network registry key: %v", err) return "", fmt.Errorf("Error opening adapter-specific TCP/IP network registry key: %v", err)
} }
@ -565,5 +566,19 @@ func (wintun *Wintun) GetTcpipInterfaceRegKeyName() (path string, err error) {
// DataFileName returns Wintun device data pipe name. // DataFileName returns Wintun device data pipe name.
// //
func (wintun *Wintun) DataFileName() string { func (wintun *Wintun) DataFileName() string {
return fmt.Sprintf("\\\\.\\Global\\WINTUN%d", wintun.LUIDIndex) return fmt.Sprintf("\\\\.\\Global\\WINTUN%d", wintun.luidIndex)
}
//
// GUID returns the GUID of the interface.
//
func (wintun *Wintun) GUID() windows.GUID {
return wintun.cfgInstanceID
}
//
// LUID returns the LUID of the interface.
//
func (wintun *Wintun) LUID() uint64 {
return ((uint64(wintun.luidIndex) & ((1 << 24) - 1)) << 24) | ((uint64(wintun.ifType) & ((1 << 16) - 1)) << 48)
} }