updater: add initial skeleton

1 files changed, 43 insertions, 0 deletions

diff --git a/version/os_windows.go b/version/os_windows.go
new file mode 100644
index 00000000..ac4e8957
--- /dev/null
+++ b/version/os_windows.go
@@ -0,0 +1,43 @@
+/* SPDX-License-Identifier: MIT
+ *
+ * Copyright (C) 2019 WireGuard LLC. All Rights Reserved.
+ */
+
+package version
+
+import (
+	"fmt"
+	"unsafe"
+)
+
+type osVersionInfo struct {
+	osVersionInfoSize uint32
+	majorVersion      uint32
+	minorVersion      uint32
+	buildNumber       uint32
+	platformId        uint32
+	csdVersion        [128]uint16
+	servicePackMajor  uint16
+	servicePackMinor  uint16
+	suiteMask         uint16
+	productType       byte
+	reserved          byte
+}
+
+//sys rtlGetVersion(versionInfo *osVersionInfo) (nterr uint32) = ntdll.RtlGetVersion
+
+func OsName() string {
+	windowsVersion := "Windows Unknown"
+	versionInfo := &osVersionInfo{osVersionInfoSize: uint32(unsafe.Sizeof(osVersionInfo{}))}
+	if rtlGetVersion(versionInfo) == 0 {
+		winType := ""
+		switch versionInfo.productType {
+		case 3:
+			winType = " Server"
+		case 2:
+			winType = " Controller"
+		}
+		windowsVersion = fmt.Sprintf("Windows%s %d.%d.%d", winType, versionInfo.majorVersion, versionInfo.minorVersion, versionInfo.buildNumber)
+	}
+	return windowsVersion
+}