mirror of
https://git.zx2c4.com/wireguard-windows
synced 2024-11-10 16:59:18 +00:00
92 lines
2.0 KiB
Go
92 lines
2.0 KiB
Go
/* SPDX-License-Identifier: MIT
|
|
*
|
|
* Copyright (C) 2017-2022 WireGuard LLC. All Rights Reserved.
|
|
*/
|
|
|
|
package driver
|
|
|
|
import (
|
|
"fmt"
|
|
"sync"
|
|
"sync/atomic"
|
|
"unsafe"
|
|
|
|
"golang.org/x/sys/windows"
|
|
)
|
|
|
|
func newLazyDLL(name string, onLoad func(d *lazyDLL)) *lazyDLL {
|
|
return &lazyDLL{Name: name, onLoad: onLoad}
|
|
}
|
|
|
|
func (d *lazyDLL) NewProc(name string) *lazyProc {
|
|
return &lazyProc{dll: d, Name: name}
|
|
}
|
|
|
|
type lazyProc struct {
|
|
Name string
|
|
mu sync.Mutex
|
|
dll *lazyDLL
|
|
addr uintptr
|
|
}
|
|
|
|
func (p *lazyProc) Find() error {
|
|
if atomic.LoadPointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr))) != nil {
|
|
return nil
|
|
}
|
|
p.mu.Lock()
|
|
defer p.mu.Unlock()
|
|
if p.addr != 0 {
|
|
return nil
|
|
}
|
|
|
|
err := p.dll.Load()
|
|
if err != nil {
|
|
return fmt.Errorf("Error loading %v DLL: %w", p.dll.Name, err)
|
|
}
|
|
addr, err := p.nameToAddr()
|
|
if err != nil {
|
|
return fmt.Errorf("Error getting %v address: %w", p.Name, err)
|
|
}
|
|
|
|
atomic.StorePointer((*unsafe.Pointer)(unsafe.Pointer(&p.addr)), unsafe.Pointer(addr))
|
|
return nil
|
|
}
|
|
|
|
func (p *lazyProc) Addr() uintptr {
|
|
err := p.Find()
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return p.addr
|
|
}
|
|
|
|
// Version returns the version of the driver DLL.
|
|
func Version() string {
|
|
if modwireguard.Load() != nil {
|
|
return "unknown"
|
|
}
|
|
resInfo, err := windows.FindResource(modwireguard.Base, windows.ResourceID(1), windows.RT_VERSION)
|
|
if err != nil {
|
|
return "unknown"
|
|
}
|
|
data, err := windows.LoadResourceData(modwireguard.Base, resInfo)
|
|
if err != nil {
|
|
return "unknown"
|
|
}
|
|
|
|
var fixedInfo *windows.VS_FIXEDFILEINFO
|
|
fixedInfoLen := uint32(unsafe.Sizeof(*fixedInfo))
|
|
err = windows.VerQueryValue(unsafe.Pointer(&data[0]), `\`, unsafe.Pointer(&fixedInfo), &fixedInfoLen)
|
|
if err != nil {
|
|
return "unknown"
|
|
}
|
|
version := fmt.Sprintf("%d.%d", (fixedInfo.FileVersionMS>>16)&0xff, (fixedInfo.FileVersionMS>>0)&0xff)
|
|
if nextNibble := (fixedInfo.FileVersionLS >> 16) & 0xff; nextNibble != 0 {
|
|
version += fmt.Sprintf(".%d", nextNibble)
|
|
}
|
|
if nextNibble := (fixedInfo.FileVersionLS >> 0) & 0xff; nextNibble != 0 {
|
|
version += fmt.Sprintf(".%d", nextNibble)
|
|
}
|
|
return version
|
|
}
|