diff options
Diffstat (limited to 'tun/wintun/wintun_windows.go')
-rw-r--r-- | tun/wintun/wintun_windows.go | 150 |
1 files changed, 0 insertions, 150 deletions
diff --git a/tun/wintun/wintun_windows.go b/tun/wintun/wintun_windows.go deleted file mode 100644 index 2fe26a7..0000000 --- a/tun/wintun/wintun_windows.go +++ /dev/null @@ -1,150 +0,0 @@ -/* SPDX-License-Identifier: MIT - * - * Copyright (C) 2017-2021 WireGuard LLC. All Rights Reserved. - */ - -package wintun - -import ( - "log" - "runtime" - "syscall" - "unsafe" - - "golang.org/x/sys/windows" -) - -type loggerLevel int - -const ( - logInfo loggerLevel = iota - logWarn - logErr -) - -const AdapterNameMax = 128 - -type Adapter struct { - handle uintptr -} - -var ( - modwintun = newLazyDLL("wintun.dll", setupLogger) - procWintunCreateAdapter = modwintun.NewProc("WintunCreateAdapter") - procWintunOpenAdapter = modwintun.NewProc("WintunOpenAdapter") - procWintunCloseAdapter = modwintun.NewProc("WintunCloseAdapter") - procWintunDeleteDriver = modwintun.NewProc("WintunDeleteDriver") - procWintunGetAdapterLUID = modwintun.NewProc("WintunGetAdapterLUID") - procWintunGetRunningDriverVersion = modwintun.NewProc("WintunGetRunningDriverVersion") -) - -type TimestampedWriter interface { - WriteWithTimestamp(p []byte, ts int64) (n int, err error) -} - -func logMessage(level loggerLevel, timestamp uint64, msg *uint16) int { - if tw, ok := log.Default().Writer().(TimestampedWriter); ok { - tw.WriteWithTimestamp([]byte(log.Default().Prefix()+windows.UTF16PtrToString(msg)), (int64(timestamp)-116444736000000000)*100) - } else { - log.Println(windows.UTF16PtrToString(msg)) - } - return 0 -} - -func setupLogger(dll *lazyDLL) { - var callback uintptr - if runtime.GOARCH == "386" { - callback = windows.NewCallback(func(level loggerLevel, timestampLow, timestampHigh uint32, msg *uint16) int { - return logMessage(level, uint64(timestampHigh)<<32|uint64(timestampLow), msg) - }) - } else if runtime.GOARCH == "arm" { - callback = windows.NewCallback(func(level loggerLevel, _, timestampLow, timestampHigh uint32, msg *uint16) int { - return logMessage(level, uint64(timestampHigh)<<32|uint64(timestampLow), msg) - }) - } else if runtime.GOARCH == "amd64" || runtime.GOARCH == "arm64" { - callback = windows.NewCallback(logMessage) - } - syscall.Syscall(dll.NewProc("WintunSetLogger").Addr(), 1, callback, 0, 0) -} - -func closeAdapter(wintun *Adapter) { - syscall.Syscall(procWintunCloseAdapter.Addr(), 1, wintun.handle, 0, 0) -} - -// CreateAdapter creates a Wintun adapter. name is the cosmetic name of the adapter. -// tunnelType represents the type of adapter and should be "Wintun". requestedGUID is -// the GUID of the created network adapter, which then influences NLA generation -// deterministically. If it is set to nil, the GUID is chosen by the system at random, -// and hence a new NLA entry is created for each new adapter. -func CreateAdapter(name string, tunnelType string, requestedGUID *windows.GUID) (wintun *Adapter, err error) { - var name16 *uint16 - name16, err = windows.UTF16PtrFromString(name) - if err != nil { - return - } - var tunnelType16 *uint16 - tunnelType16, err = windows.UTF16PtrFromString(tunnelType) - if err != nil { - return - } - r0, _, e1 := syscall.Syscall(procWintunCreateAdapter.Addr(), 3, uintptr(unsafe.Pointer(name16)), uintptr(unsafe.Pointer(tunnelType16)), uintptr(unsafe.Pointer(requestedGUID))) - if r0 == 0 { - err = e1 - return - } - wintun = &Adapter{handle: r0} - runtime.SetFinalizer(wintun, closeAdapter) - return -} - -// OpenAdapter opens an existing Wintun adapter by name. -func OpenAdapter(name string) (wintun *Adapter, err error) { - var name16 *uint16 - name16, err = windows.UTF16PtrFromString(name) - if err != nil { - return - } - r0, _, e1 := syscall.Syscall(procWintunOpenAdapter.Addr(), 1, uintptr(unsafe.Pointer(name16)), 0, 0) - if r0 == 0 { - err = e1 - return - } - wintun = &Adapter{handle: r0} - runtime.SetFinalizer(wintun, closeAdapter) - return -} - -// Close closes a Wintun adapter. -func (wintun *Adapter) Close() (err error) { - runtime.SetFinalizer(wintun, nil) - r1, _, e1 := syscall.Syscall(procWintunCloseAdapter.Addr(), 1, wintun.handle, 0, 0) - if r1 == 0 { - err = e1 - } - return -} - -// Uninstall removes the driver from the system if no drivers are currently in use. -func Uninstall() (err error) { - r1, _, e1 := syscall.Syscall(procWintunDeleteDriver.Addr(), 0, 0, 0, 0) - if r1 == 0 { - err = e1 - } - return -} - -// RunningVersion returns the version of the loaded driver. -func RunningVersion() (version uint32, err error) { - r0, _, e1 := syscall.Syscall(procWintunGetRunningDriverVersion.Addr(), 0, 0, 0, 0) - version = uint32(r0) - if version == 0 { - err = e1 - } - return -} - -// LUID returns the LUID of the adapter. -func (wintun *Adapter) LUID() (luid uint64) { - syscall.Syscall(procWintunGetAdapterLUID.Addr(), 2, uintptr(wintun.handle), uintptr(unsafe.Pointer(&luid)), 0) - return -} |