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wintun: allow retrieving DLL version

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Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2021-10-20 12:13:44 -06:00
parent f87e87af0d
commit fdf57a1fa4
4 changed files with 37 additions and 7 deletions
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30
tun/wintun/dll_windows.go
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@@ -96,3 +96,33 @@ func (d *lazyDLL) Load() error {
func (p *lazyProc) nameToAddr() (uintptr, error) {
return windows.GetProcAddress(p.dll.module, p.Name)
}
// Version returns the version of the Wintun DLL.
func Version() string {
if modwintun.Load() != nil {
return "unknown"
}
resInfo, err := windows.FindResource(modwintun.module, windows.ResourceID(1), windows.RT_VERSION)
if err != nil {
return "unknown"
}
data, err := windows.LoadResourceData(modwintun.module, 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
}

2
tun/wintun/wintun_windows.go
View File

@@ -129,7 +129,7 @@ func Uninstall() (err error) {
return
}
// RunningVersion returns the version of the running Wintun driver.
// 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)