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windows: allow determining real version number

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Other functions, like GetVersion(), will lie about the OS version
depending on various win32 and manifest compatibility shims in place.
Calling RtlGetVersion is the proper way to retrieve the true OS version.

Change-Id: I2bd6d097dd763df51617cd825dc0ad300abf6212
Reviewed-on: https://go-review.googlesource.com/c/sys/+/182718
Run-TryBot: Jason A. Donenfeld <Jason@zx2c4.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld
2019-06-18 15:50:05 +00:00
parent 15dcb6c006
commit 516e3c2063
4 changed files with 45 additions and 0 deletions
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windows/zsyscall_windows.go
+10
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@@ -43,6 +43,7 @@ var (
modcrypt32 = NewLazySystemDLL("crypt32.dll")
moduser32 = NewLazySystemDLL("user32.dll")
modole32 = NewLazySystemDLL("ole32.dll")
modntdll = NewLazySystemDLL("ntdll.dll")
modws2_32 = NewLazySystemDLL("ws2_32.dll")
moddnsapi = NewLazySystemDLL("dnsapi.dll")
modiphlpapi = NewLazySystemDLL("iphlpapi.dll")
@@ -232,6 +233,7 @@ var (
procStringFromGUID2 = modole32.NewProc("StringFromGUID2")
procCoCreateGuid = modole32.NewProc("CoCreateGuid")
procCoTaskMemFree = modole32.NewProc("CoTaskMemFree")
procRtlGetVersion = modntdll.NewProc("RtlGetVersion")
procWSAStartup = modws2_32.NewProc("WSAStartup")
procWSACleanup = modws2_32.NewProc("WSACleanup")
procWSAIoctl = modws2_32.NewProc("WSAIoctl")
@@ -2520,6 +2522,14 @@ func coTaskMemFree(address unsafe.Pointer) {
return
}
func rtlGetVersion(info *OsVersionInfoEx) (ret error) {
r0, _, _ := syscall.Syscall(procRtlGetVersion.Addr(), 1, uintptr(unsafe.Pointer(info)), 0, 0)
if r0 != 0 {
ret = syscall.Errno(r0)
}
return
}
func WSAStartup(verreq uint32, data *WSAData) (sockerr error) {
r0, _, _ := syscall.Syscall(procWSAStartup.Addr(), 2, uintptr(verreq), uintptr(unsafe.Pointer(data)), 0)
if r0 != 0 {