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wintun: allow retrieving DLL version 

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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4
go.mod
View File

@ -4,6 +4,6 @@ go 1.17
require (
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
golang.org/x/net v0.0.0-20210927181540-4e4d966f7476
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6
golang.org/x/net v0.0.0-20211020060615-d418f374d309
golang.org/x/sys v0.0.0-20211020174200-9d6173849985
)

8
go.sum
View File

@ -1,13 +1,13 @@
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519 h1:7I4JAnoQBe7ZtJcBaYHi5UtiO8tQHbUSXxL+pnGRANg=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20210927181540-4e4d966f7476 h1:s5hu7bTnLKswvidgtqc4GwsW83m9LZu8UAqzmWOZtI4=
golang.org/x/net v0.0.0-20210927181540-4e4d966f7476/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20211020060615-d418f374d309 h1:A0lJIi+hcTR6aajJH4YqKWwohY4aW9RO7oRMcdv+HKI=
golang.org/x/net v0.0.0-20211020060615-d418f374d309/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6 h1:foEbQz/B0Oz6YIqu/69kfXPYeFQAuuMYFkjaqXzl5Wo=
golang.org/x/sys v0.0.0-20210927094055-39ccf1dd6fa6/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211020174200-9d6173849985 h1:LOlKVhfDyahgmqa97awczplwkjzNaELFg3zRIJ13RYo=
golang.org/x/sys v0.0.0-20211020174200-9d6173849985/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=

30
tun/wintun/dll_windows.go
View File

@ -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)