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-rw-r--r--tun/tun_windows.go40
-rw-r--r--tun/wintun/registry/mksyscall.go8
-rw-r--r--tun/wintun/registry/registry_windows.go240
-rw-r--r--tun/wintun/registry/registry_windows_test.go103
-rw-r--r--tun/wintun/registry/zregistry_windows.go63
-rw-r--r--tun/wintun/registryhacks_windows.go42
-rw-r--r--tun/wintun/wintun_windows.go171
7 files changed, 534 insertions, 133 deletions
diff --git a/tun/tun_windows.go b/tun/tun_windows.go
index b319c27..8218fc3 100644
--- a/tun/tun_windows.go
+++ b/tun/tun_windows.go
@@ -62,35 +62,27 @@ func packetAlign(size uint32) uint32 {
func CreateTUN(ifname string) (TUNDevice, error) {
var err error
var wt *wintun.Wintun
- for i := 0; i < 3; i++ {
- // Does an interface with this name already exist?
- wt, err = wintun.GetInterface(ifname, 0)
- if wt == nil {
- // Interface does not exist or an error occured. Create one.
- wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", 0)
- if err != nil {
- err = fmt.Errorf("wintun.CreateInterface: %v", err)
- continue
- }
- } else if err != nil {
- // Foreign interface with the same name found.
- // We could create a Wintun interface under a temporary name. But, should our
- // process die without deleting this interface first, the interface would remain
- // orphaned.
- err = fmt.Errorf("wintun.GetInterface: %v", err)
- continue
- }
- err = wt.SetInterfaceName(ifname) //TODO: This is the function that most often fails
+ // Does an interface with this name already exist?
+ wt, err = wintun.GetInterface(ifname, 0)
+ if wt == nil {
+ // Interface does not exist or an error occurred. Create one.
+ wt, _, err = wintun.CreateInterface("WireGuard Tunnel Adapter", 0)
if err != nil {
- wt.DeleteInterface(0)
- wt = nil
- err = fmt.Errorf("wintun.SetInterfaceName: %v", err)
- continue
+ return nil, fmt.Errorf("wintun.CreateInterface: %v", err)
}
+ } else if err != nil {
+ // Foreign interface with the same name found.
+ // We could create a Wintun interface under a temporary name. But, should our
+ // process die without deleting this interface first, the interface would remain
+ // orphaned.
+ return nil, fmt.Errorf("wintun.GetInterface: %v", err)
}
+
+ err = wt.SetInterfaceName(ifname)
if err != nil {
- return nil, err
+ wt.DeleteInterface(0)
+ return nil, fmt.Errorf("wintun.SetInterfaceName: %v", err)
}
err = wt.FlushInterface()
diff --git a/tun/wintun/registry/mksyscall.go b/tun/wintun/registry/mksyscall.go
new file mode 100644
index 0000000..d0cac6c
--- /dev/null
+++ b/tun/wintun/registry/mksyscall.go
@@ -0,0 +1,8 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package registry
+
+//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zregistry_windows.go registry_windows.go
diff --git a/tun/wintun/registry/registry_windows.go b/tun/wintun/registry/registry_windows.go
new file mode 100644
index 0000000..65da6bf
--- /dev/null
+++ b/tun/wintun/registry/registry_windows.go
@@ -0,0 +1,240 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package registry
+
+import (
+ "errors"
+ "fmt"
+ "runtime"
+ "strings"
+ "time"
+
+ "golang.org/x/sys/windows"
+ "golang.org/x/sys/windows/registry"
+)
+
+const (
+ KEY_NOTIFY uint32 = 0x0010 // should be defined upstream as registry.KEY_NOTIFY
+)
+
+const (
+ // REG_NOTIFY_CHANGE_NAME notifies the caller if a subkey is added or deleted.
+ REG_NOTIFY_CHANGE_NAME uint32 = 0x00000001
+
+ // REG_NOTIFY_CHANGE_ATTRIBUTES notifies the caller of changes to the attributes of the key, such as the security descriptor information.
+ REG_NOTIFY_CHANGE_ATTRIBUTES uint32 = 0x00000002
+
+ // REG_NOTIFY_CHANGE_LAST_SET notifies the caller of changes to a value of the key. This can include adding or deleting a value, or changing an existing value.
+ REG_NOTIFY_CHANGE_LAST_SET uint32 = 0x00000004
+
+ // REG_NOTIFY_CHANGE_SECURITY notifies the caller of changes to the security descriptor of the key.
+ REG_NOTIFY_CHANGE_SECURITY uint32 = 0x00000008
+
+ // REG_NOTIFY_THREAD_AGNOSTIC indicates that the lifetime of the registration must not be tied to the lifetime of the thread issuing the RegNotifyChangeKeyValue call. Note: This flag value is only supported in Windows 8 and later.
+ REG_NOTIFY_THREAD_AGNOSTIC uint32 = 0x10000000
+)
+
+//sys regNotifyChangeKeyValue(key windows.Handle, watchSubtree bool, notifyFilter uint32, event windows.Handle, asynchronous bool) (regerrno error) = advapi32.RegNotifyChangeKeyValue
+
+func OpenKeyWait(k registry.Key, path string, access uint32, timeout time.Duration) (registry.Key, error) {
+ runtime.LockOSThread()
+ defer runtime.UnlockOSThread()
+
+ deadline := time.Now().Add(timeout)
+ pathSpl := strings.Split(path, "\\")
+ for i := 0; ; i++ {
+ keyName := pathSpl[i]
+ isLast := i+1 == len(pathSpl)
+
+ event, err := windows.CreateEvent(nil, 0, 0, nil)
+ if err != nil {
+ return 0, fmt.Errorf("Error creating event: %v", err)
+ }
+ defer windows.CloseHandle(event)
+
+ var key registry.Key
+ for {
+ err = regNotifyChangeKeyValue(windows.Handle(k), false, REG_NOTIFY_CHANGE_NAME, windows.Handle(event), true)
+ if err != nil {
+ return 0, fmt.Errorf("Setting up change notification on registry key failed: %v", err)
+ }
+
+ var accessFlags uint32
+ if isLast {
+ accessFlags = access
+ } else {
+ accessFlags = KEY_NOTIFY
+ }
+ key, err = registry.OpenKey(k, keyName, accessFlags)
+ if err == windows.ERROR_FILE_NOT_FOUND || err == windows.ERROR_PATH_NOT_FOUND {
+ timeout := time.Until(deadline) / time.Millisecond
+ if timeout < 0 {
+ timeout = 0
+ }
+ s, err := windows.WaitForSingleObject(event, uint32(timeout))
+ if err != nil {
+ return 0, fmt.Errorf("Unable to wait on registry key: %v", err)
+ }
+ if s == uint32(windows.WAIT_TIMEOUT) { // windows.WAIT_TIMEOUT status const is misclassified as error in golang.org/x/sys/windows
+ return 0, errors.New("Timeout waiting for registry key")
+ }
+ } else if err != nil {
+ return 0, fmt.Errorf("Error opening registry key %v: %v", path, err)
+ } else {
+ if isLast {
+ return key, nil
+ }
+ defer key.Close()
+ break
+ }
+ }
+
+ k = key
+ }
+}
+
+func WaitForKey(k registry.Key, path string, timeout time.Duration) error {
+ key, err := OpenKeyWait(k, path, KEY_NOTIFY, timeout)
+ if err != nil {
+ return err
+ }
+ key.Close()
+ return nil
+}
+
+//
+// getStringValueRetry function reads a string value from registry. It waits for
+// the registry value to become available or returns error on timeout.
+//
+// Key must be opened with at least QUERY_VALUE|KEY_NOTIFY access.
+//
+func getStringValueRetry(key registry.Key, name string, timeout time.Duration) (string, uint32, error) {
+ runtime.LockOSThread()
+ defer runtime.UnlockOSThread()
+
+ event, err := windows.CreateEvent(nil, 0, 0, nil)
+ if err != nil {
+ return "", 0, fmt.Errorf("Error creating event: %v", err)
+ }
+ defer windows.CloseHandle(event)
+
+ deadline := time.Now().Add(timeout)
+ for {
+ err := regNotifyChangeKeyValue(windows.Handle(key), false, REG_NOTIFY_CHANGE_LAST_SET, windows.Handle(event), true)
+ if err != nil {
+ return "", 0, fmt.Errorf("Setting up change notification on registry value failed: %v", err)
+ }
+
+ value, valueType, err := key.GetStringValue(name)
+ if err == windows.ERROR_FILE_NOT_FOUND || err == windows.ERROR_PATH_NOT_FOUND {
+ timeout := time.Until(deadline) / time.Millisecond
+ if timeout < 0 {
+ timeout = 0
+ }
+ s, err := windows.WaitForSingleObject(event, uint32(timeout))
+ if err != nil {
+ return "", 0, fmt.Errorf("Unable to wait on registry value: %v", err)
+ }
+ if s == uint32(windows.WAIT_TIMEOUT) { // windows.WAIT_TIMEOUT status const is misclassified as error in golang.org/x/sys/windows
+ return "", 0, errors.New("Timeout waiting for registry value")
+ }
+ } else if err != nil {
+ return "", 0, fmt.Errorf("Error reading registry value %v: %v", name, err)
+ } else {
+ return value, valueType, nil
+ }
+ }
+}
+
+func expandString(value string, valueType uint32, err error) (string, error) {
+ if err != nil {
+ return "", err
+ }
+
+ if valueType != registry.EXPAND_SZ {
+ // Value does not require expansion.
+ return value, nil
+ }
+
+ valueExp, err := registry.ExpandString(value)
+ if err != nil {
+ // Expanding failed: return original sting value.
+ return value, nil
+ }
+
+ // Return expanded value.
+ return valueExp, nil
+}
+
+//
+// GetStringValueWait function reads a string value from registry. It waits
+// for the registry value to become available or returns error on timeout.
+//
+// Key must be opened with at least QUERY_VALUE|KEY_NOTIFY access.
+//
+// If the value type is REG_EXPAND_SZ the environment variables are expanded.
+// Should expanding fail, original string value and nil error are returned.
+//
+func GetStringValueWait(key registry.Key, name string, timeout time.Duration) (string, error) {
+ return expandString(getStringValueRetry(key, name, timeout))
+}
+
+//
+// GetStringValue function reads a string value from registry.
+//
+// Key must be opened with at least QUERY_VALUE access.
+//
+// If the value type is REG_EXPAND_SZ the environment variables are expanded.
+// Should expanding fail, original string value and nil error are returned.
+//
+func GetStringValue(key registry.Key, name string) (string, error) {
+ return expandString(key.GetStringValue(name))
+}
+
+//
+// GetIntegerValueWait function reads a DWORD32 or QWORD value from registry.
+// It waits for the registry value to become available or returns error on
+// timeout.
+//
+// Key must be opened with at least QUERY_VALUE|KEY_NOTIFY access.
+//
+func GetIntegerValueWait(key registry.Key, name string, timeout time.Duration) (uint64, error) {
+ runtime.LockOSThread()
+ defer runtime.UnlockOSThread()
+
+ event, err := windows.CreateEvent(nil, 0, 0, nil)
+ if err != nil {
+ return 0, fmt.Errorf("Error creating event: %v", err)
+ }
+ defer windows.CloseHandle(event)
+
+ deadline := time.Now().Add(timeout)
+ for {
+ err := regNotifyChangeKeyValue(windows.Handle(key), false, REG_NOTIFY_CHANGE_LAST_SET, windows.Handle(event), true)
+ if err != nil {
+ return 0, fmt.Errorf("Setting up change notification on registry value failed: %v", err)
+ }
+
+ value, _, err := key.GetIntegerValue(name)
+ if err == windows.ERROR_FILE_NOT_FOUND || err == windows.ERROR_PATH_NOT_FOUND {
+ timeout := time.Until(deadline) / time.Millisecond
+ if timeout < 0 {
+ timeout = 0
+ }
+ s, err := windows.WaitForSingleObject(event, uint32(timeout))
+ if err != nil {
+ return 0, fmt.Errorf("Unable to wait on registry value: %v", err)
+ }
+ if s == uint32(windows.WAIT_TIMEOUT) { // windows.WAIT_TIMEOUT status const is misclassified as error in golang.org/x/sys/windows
+ return 0, errors.New("Timeout waiting for registry value")
+ }
+ } else if err != nil {
+ return 0, fmt.Errorf("Error reading registry value %v: %v", name, err)
+ } else {
+ return value, nil
+ }
+ }
+}
diff --git a/tun/wintun/registry/registry_windows_test.go b/tun/wintun/registry/registry_windows_test.go
new file mode 100644
index 0000000..c5a6e28
--- /dev/null
+++ b/tun/wintun/registry/registry_windows_test.go
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package registry
+
+import (
+ "testing"
+ "time"
+
+ "golang.org/x/sys/windows/registry"
+)
+
+const keyRoot = registry.CURRENT_USER
+const pathRoot = "Software\\WireGuardRegistryTest"
+const path = pathRoot + "\\foobar"
+const pathFake = pathRoot + "\\raboof"
+
+func Test_WaitForKey(t *testing.T) {
+ registry.DeleteKey(keyRoot, path)
+ registry.DeleteKey(keyRoot, pathRoot)
+ go func() {
+ time.Sleep(time.Second * 1)
+ key, _, err := registry.CreateKey(keyRoot, pathFake, registry.QUERY_VALUE)
+ if err != nil {
+ t.Errorf("Error creating registry key: %v", err)
+ }
+ key.Close()
+ registry.DeleteKey(keyRoot, pathFake)
+
+ key, _, err = registry.CreateKey(keyRoot, path, registry.QUERY_VALUE)
+ if err != nil {
+ t.Errorf("Error creating registry key: %v", err)
+ }
+ key.Close()
+ }()
+ err := WaitForKey(keyRoot, path, time.Second*2)
+ if err != nil {
+ t.Errorf("Error waiting for registry key: %v", err)
+ }
+ registry.DeleteKey(keyRoot, path)
+ registry.DeleteKey(keyRoot, pathRoot)
+
+ err = WaitForKey(keyRoot, path, time.Second*1)
+ if err == nil {
+ t.Error("Registry key notification expected to timeout but it succeeded.")
+ }
+}
+
+func Test_GetValueWait(t *testing.T) {
+ registry.DeleteKey(keyRoot, path)
+ registry.DeleteKey(keyRoot, pathRoot)
+ go func() {
+ time.Sleep(time.Second * 1)
+ key, _, err := registry.CreateKey(keyRoot, path, registry.SET_VALUE)
+ if err != nil {
+ t.Errorf("Error creating registry key: %v", err)
+ }
+ time.Sleep(time.Second * 1)
+ key.SetStringValue("name1", "eulav")
+ key.SetExpandStringValue("name2", "value")
+ time.Sleep(time.Second * 1)
+ key.SetDWordValue("name3", ^uint32(123))
+ key.SetDWordValue("name4", 123)
+ key.Close()
+ }()
+
+ key, err := OpenKeyWait(keyRoot, path, registry.QUERY_VALUE|KEY_NOTIFY, time.Second*2)
+ if err != nil {
+ t.Errorf("Error waiting for registry key: %v", err)
+ }
+
+ valueStr, err := GetStringValueWait(key, "name2", time.Second*2)
+ if err != nil {
+ t.Errorf("Error waiting for registry value: %v", err)
+ }
+ if valueStr != "value" {
+ t.Errorf("Wrong value read: %v", valueStr)
+ }
+
+ _, err = GetStringValueWait(key, "nonexisting", time.Second*1)
+ if err == nil {
+ t.Error("Registry value notification expected to timeout but it succeeded.")
+ }
+
+ valueInt, err := GetIntegerValueWait(key, "name4", time.Second*2)
+ if err != nil {
+ t.Errorf("Error waiting for registry value: %v", err)
+ }
+ if valueInt != 123 {
+ t.Errorf("Wrong value read: %v", valueInt)
+ }
+
+ _, err = GetIntegerValueWait(key, "nonexisting", time.Second*1)
+ if err == nil {
+ t.Error("Registry value notification expected to timeout but it succeeded.")
+ }
+
+ key.Close()
+ registry.DeleteKey(keyRoot, path)
+ registry.DeleteKey(keyRoot, pathRoot)
+}
diff --git a/tun/wintun/registry/zregistry_windows.go b/tun/wintun/registry/zregistry_windows.go
new file mode 100644
index 0000000..f7ac33b
--- /dev/null
+++ b/tun/wintun/registry/zregistry_windows.go
@@ -0,0 +1,63 @@
+// Code generated by 'go generate'; DO NOT EDIT.
+
+package registry
+
+import (
+ "syscall"
+ "unsafe"
+
+ "golang.org/x/sys/windows"
+)
+
+var _ unsafe.Pointer
+
+// Do the interface allocations only once for common
+// Errno values.
+const (
+ errnoERROR_IO_PENDING = 997
+)
+
+var (
+ errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
+)
+
+// errnoErr returns common boxed Errno values, to prevent
+// allocations at runtime.
+func errnoErr(e syscall.Errno) error {
+ switch e {
+ case 0:
+ return nil
+ case errnoERROR_IO_PENDING:
+ return errERROR_IO_PENDING
+ }
+ // TODO: add more here, after collecting data on the common
+ // error values see on Windows. (perhaps when running
+ // all.bat?)
+ return e
+}
+
+var (
+ modadvapi32 = windows.NewLazySystemDLL("advapi32.dll")
+
+ procRegNotifyChangeKeyValue = modadvapi32.NewProc("RegNotifyChangeKeyValue")
+)
+
+func regNotifyChangeKeyValue(key windows.Handle, watchSubtree bool, notifyFilter uint32, event windows.Handle, asynchronous bool) (regerrno error) {
+ var _p0 uint32
+ if watchSubtree {
+ _p0 = 1
+ } else {
+ _p0 = 0
+ }
+ var _p1 uint32
+ if asynchronous {
+ _p1 = 1
+ } else {
+ _p1 = 0
+ }
+ r0, _, _ := syscall.Syscall6(procRegNotifyChangeKeyValue.Addr(), 5, uintptr(key), uintptr(_p0), uintptr(notifyFilter), uintptr(event), uintptr(_p1), 0)
+ if r0 != 0 {
+ regerrno = syscall.Errno(r0)
+ }
+ return
+}
diff --git a/tun/wintun/registryhacks_windows.go b/tun/wintun/registryhacks_windows.go
deleted file mode 100644
index bf72f92..0000000
--- a/tun/wintun/registryhacks_windows.go
+++ /dev/null
@@ -1,42 +0,0 @@
-/* SPDX-License-Identifier: MIT
- *
- * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
- */
-
-package wintun
-
-import (
- "golang.org/x/sys/windows/registry"
- "time"
-)
-
-const (
- numRetries = 50
- retryTimeout = 100 * time.Millisecond
-)
-
-func registryOpenKeyRetry(k registry.Key, path string, access uint32) (key registry.Key, err error) {
- for i := 0; i < numRetries; i++ {
- key, err = registry.OpenKey(k, path, access)
- if err == nil {
- break
- }
- if i != numRetries-1 {
- time.Sleep(retryTimeout)
- }
- }
- return
-}
-
-func keyGetStringValueRetry(k registry.Key, name string) (val string, valtype uint32, err error) {
- for i := 0; i < numRetries; i++ {
- val, valtype, err = k.GetStringValue(name)
- if err == nil {
- break
- }
- if i != numRetries-1 {
- time.Sleep(retryTimeout)
- }
- }
- return
-}
diff --git a/tun/wintun/wintun_windows.go b/tun/wintun/wintun_windows.go
index 69f6eb6..fb2cc22 100644
--- a/tun/wintun/wintun_windows.go
+++ b/tun/wintun/wintun_windows.go
@@ -8,7 +8,6 @@ package wintun
import (
"errors"
"fmt"
- "golang.zx2c4.com/wireguard/tun/wintun/netshell"
"strings"
"syscall"
"time"
@@ -17,6 +16,8 @@ import (
"golang.org/x/sys/windows"
"golang.org/x/sys/windows/registry"
"golang.zx2c4.com/wireguard/tun/wintun/guid"
+ "golang.zx2c4.com/wireguard/tun/wintun/netshell"
+ registryEx "golang.zx2c4.com/wireguard/tun/wintun/registry"
"golang.zx2c4.com/wireguard/tun/wintun/setupapi"
)
@@ -34,33 +35,24 @@ var deviceClassNetGUID = windows.GUID{Data1: 0x4d36e972, Data2: 0xe325, Data3: 0
const hardwareID = "Wintun"
const enumerator = ""
const machineName = ""
+const waitForRegistryTimeout = time.Second * 5
//
// MakeWintun creates interface handle and populates it from device registry key
//
-func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData, wait bool) (*Wintun, error) {
+func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfoData) (*Wintun, error) {
// Open HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\<class>\<id> registry key.
- key, err := deviceInfoSet.OpenDevRegKey(deviceInfoData, setupapi.DICS_FLAG_GLOBAL, 0, setupapi.DIREG_DRV, registry.READ)
+ key, err := deviceInfoSet.OpenDevRegKey(deviceInfoData, setupapi.DICS_FLAG_GLOBAL, 0, setupapi.DIREG_DRV, registry.QUERY_VALUE)
if err != nil {
return nil, errors.New("Device-specific registry key open failed: " + err.Error())
}
defer key.Close()
- var valueStr string
- var valueType uint32
-
// Read the NetCfgInstanceId value.
- if wait {
- valueStr, valueType, err = keyGetStringValueRetry(key, "NetCfgInstanceId")
- } else {
- valueStr, valueType, err = key.GetStringValue("NetCfgInstanceId")
- }
+ valueStr, err := registryEx.GetStringValue(key, "NetCfgInstanceId")
if err != nil {
return nil, errors.New("RegQueryStringValue(\"NetCfgInstanceId\") failed: " + err.Error())
}
- if valueType != registry.SZ {
- return nil, fmt.Errorf("NetCfgInstanceId registry value is not REG_SZ (expected: %v, provided: %v)", registry.SZ, valueType)
- }
// Convert to windows.GUID.
ifid, err := guid.FromString(valueStr)
@@ -69,13 +61,13 @@ func makeWintun(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInfo
}
// Read the NetLuidIndex value.
- luidIdx, valueType, err := key.GetIntegerValue("NetLuidIndex")
+ luidIdx, _, err := key.GetIntegerValue("NetLuidIndex")
if err != nil {
return nil, errors.New("RegQueryValue(\"NetLuidIndex\") failed: " + err.Error())
}
// Read the NetLuidIndex value.
- ifType, valueType, err := key.GetIntegerValue("*IfType")
+ ifType, _, err := key.GetIntegerValue("*IfType")
if err != nil {
return nil, errors.New("RegQueryValue(\"*IfType\") failed: " + err.Error())
}
@@ -125,14 +117,14 @@ func GetInterface(ifname string, hwndParent uintptr) (*Wintun, error) {
}
// Get interface ID.
- wintun, err := makeWintun(devInfoList, deviceData, false)
+ wintun, err := makeWintun(devInfoList, deviceData)
if err != nil {
continue
}
//TODO: is there a better way than comparing ifnames?
// Get interface name.
- ifname2, err := wintun.getInterfaceNameNoRetry()
+ ifname2, err := wintun.GetInterfaceName()
if err != nil {
continue
}
@@ -298,25 +290,86 @@ func CreateInterface(description string, hwndParent uintptr) (*Wintun, bool, err
rebootRequired = true
}
- // Get network interface. DIF_INSTALLDEVICE returns almost immediately, while the device
- // installation continues in the background. It might take a while, before all registry
+ // DIF_INSTALLDEVICE returns almost immediately, while the device installation
+ // continues in the background. It might take a while, before all registry
// keys and values are populated.
- for numAttempts := 0; numAttempts < 30; numAttempts++ {
- wintun, err = makeWintun(devInfoList, deviceData, true)
- if err != nil {
- if errWin, ok := err.(syscall.Errno); ok && errWin == windows.ERROR_FILE_NOT_FOUND {
- // Wait and retry. TODO: Wait for a cancellable event instead.
- err = errors.New("Time-out waiting for adapter to get ready")
- time.Sleep(time.Second / 4)
- continue
- }
+
+ // Wait for device registry key to emerge and populate.
+ key, err := registryEx.OpenKeyWait(
+ registry.LOCAL_MACHINE,
+ fmt.Sprintf("SYSTEM\\CurrentControlSet\\Control\\Class\\%v\\%04d", guid.ToString(&deviceClassNetGUID), deviceData.DevInst),
+ registry.QUERY_VALUE|registryEx.KEY_NOTIFY,
+ waitForRegistryTimeout)
+ if err == nil {
+ _, err = registryEx.GetStringValueWait(key, "NetCfgInstanceId", waitForRegistryTimeout)
+ if err == nil {
+ _, err = registryEx.GetIntegerValueWait(key, "NetLuidIndex", waitForRegistryTimeout)
}
+ if err == nil {
+ _, err = registryEx.GetIntegerValueWait(key, "*IfType", waitForRegistryTimeout)
+ }
+ key.Close()
+ }
+ // Clear error and let makeWintun() open the key using SetupAPI's devInfoList.OpenDevRegKey().
+ err = nil
+ }
- break
+ if err == nil {
+ // Get network interface.
+ wintun, err = makeWintun(devInfoList, deviceData)
+ }
+
+ if err == nil {
+ // Wait for network registry key to emerge and populate.
+ key, err := registryEx.OpenKeyWait(
+ registry.LOCAL_MACHINE,
+ wintun.GetNetRegKeyName(),
+ registry.QUERY_VALUE|registryEx.KEY_NOTIFY,
+ waitForRegistryTimeout)
+ if err == nil {
+ _, err = registryEx.GetStringValueWait(key, "Name", waitForRegistryTimeout)
+ key.Close()
}
}
if err == nil {
+ // Wait for TCP/IP adapter registry key to emerge and populate.
+ key, err := registryEx.OpenKeyWait(
+ registry.LOCAL_MACHINE,
+ wintun.GetTcpipAdapterRegKeyName(), registry.QUERY_VALUE|registryEx.KEY_NOTIFY,
+ waitForRegistryTimeout)
+ if err == nil {
+ _, err = registryEx.GetStringValueWait(key, "IpConfig", waitForRegistryTimeout)
+ key.Close()
+ }
+ }
+
+ if err == nil {
+ // Wait for TCP/IP interface registry key to emerge.
+ key, err := registryEx.OpenKeyWait(
+ registry.LOCAL_MACHINE,
+ wintun.GetTcpipInterfaceRegKeyName(), registry.QUERY_VALUE,
+ waitForRegistryTimeout)
+ if err == nil {
+ key.Close()
+ }
+ }
+
+ //
+ // All the registry keys and values we're relying on are present now.
+ //
+
+ if err == nil {
+ // Disable dead gateway detection on our interface.
+ key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetTcpipInterfaceRegKeyName(), registry.SET_VALUE)
+ if err != nil {
+ err = errors.New("Error opening interface-specific TCP/IP network registry key: " + err.Error())
+ }
+ key.SetDWordValue("EnableDeadGWDetect", 0)
+ key.Close()
+ }
+
+ if err == nil {
return wintun, rebootRequired, nil
}
@@ -373,7 +426,7 @@ func (wintun *Wintun) DeleteInterface(hwndParent uintptr) (bool, bool, error) {
// Get interface ID.
//TODO: Store some ID in the Wintun object such that this call isn't required.
- wintun2, err := makeWintun(devInfoList, deviceData, false)
+ wintun2, err := makeWintun(devInfoList, deviceData)
if err != nil {
continue
}
@@ -438,17 +491,6 @@ func checkReboot(deviceInfoSet setupapi.DevInfo, deviceInfoData *setupapi.DevInf
// GetInterfaceName returns network interface name.
//
func (wintun *Wintun) GetInterfaceName() (string, error) {
- key, err := registryOpenKeyRetry(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.QUERY_VALUE)
- if err != nil {
- return "", errors.New("Network-specific registry key open failed: " + err.Error())
- }
- defer key.Close()
-
- // Get the interface name.
- return getRegStringValue(key, "Name")
-}
-
-func (wintun *Wintun) getInterfaceNameNoRetry() (string, error) {
key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.QUERY_VALUE)
if err != nil {
return "", errors.New("Network-specific registry key open failed: " + err.Error())
@@ -456,20 +498,13 @@ func (wintun *Wintun) getInterfaceNameNoRetry() (string, error) {
defer key.Close()
// Get the interface name.
- return getRegStringValue(key, "Name")
+ return registryEx.GetStringValue(key, "Name")
}
//
// SetInterfaceName sets network interface name.
//
func (wintun *Wintun) SetInterfaceName(ifname string) error {
- // We open the registry key before calling HrRename, because the registry open will wait until the key exists.
- key, err := registryOpenKeyRetry(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.SET_VALUE)
- if err != nil {
- return errors.New("Network-specific registry key open failed: " + err.Error())
- }
- defer key.Close()
-
// We have to tell the various runtime COM services about the new name too. We ignore the
// error because netshell isn't available on servercore.
// TODO: netsh.exe falls back to NciSetConnection in this case. If somebody complains, maybe
@@ -477,6 +512,11 @@ func (wintun *Wintun) SetInterfaceName(ifname string) error {
_ = 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.
+ key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetNetRegKeyName(), registry.SET_VALUE)
+ if err != nil {
+ return errors.New("Network-specific registry key open failed: " + err.Error())
+ }
+ defer key.Close()
return key.SetStringValue("Name", ifname)
}
@@ -488,31 +528,28 @@ func (wintun *Wintun) GetNetRegKeyName() string {
}
//
-// getRegStringValue function reads a string value from registry.
+// GetTcpipAdapterRegKeyName returns adapter-specific TCP/IP network registry key name.
//
-// If the value type is REG_EXPAND_SZ the environment variables are expanded.
-// Should expanding fail, original string value and nil error are returned.
+func (wintun *Wintun) GetTcpipAdapterRegKeyName() string {
+ return fmt.Sprintf("SYSTEM\\CurrentControlSet\\Services\\Tcpip\\Parameters\\Adapters\\%v", guid.ToString(&wintun.CfgInstanceID))
+}
+
+//
+// GetTcpipInterfaceRegKeyName returns interface-specific TCP/IP network registry key name.
//
-func getRegStringValue(key registry.Key, name string) (string, error) {
- // Read string value.
- value, valueType, err := keyGetStringValueRetry(key, name)
+func (wintun *Wintun) GetTcpipInterfaceRegKeyName() string {
+ key, err := registry.OpenKey(registry.LOCAL_MACHINE, wintun.GetTcpipAdapterRegKeyName(), registry.QUERY_VALUE)
if err != nil {
- return "", err
- }
-
- if valueType != registry.EXPAND_SZ {
- // Value does not require expansion.
- return value, nil
+ err = errors.New("Error opening adapter-specific TCP/IP network registry key: " + err.Error())
}
+ defer key.Close()
- valueExp, err := registry.ExpandString(value)
+ path, err := registryEx.GetStringValue(key, "IpConfig")
if err != nil {
- // Expanding failed: return original sting value.
- return value, nil
+ err = errors.New("Error reading IpConfig: " + err.Error())
}
- // Return expanded value.
- return valueExp, nil
+ return "SYSTEM\\CurrentControlSet\\Services\\" + path
}
//
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-05 01:55:22 +0000