vpnem: VPN infrastructure with load-balanced multi-protocol nodesHEADmain

- Multi-protocol VPS nodes (VLESS-REALITY + Hysteria2 + SOCKS5)
- Smart load balancing via recommendation API
- Windows/Linux client (Go + Wails + sing-box)
- Server API with RealIP detection and connection tracking
- Auto-deployment via vpnui control plane
- Silent Windows installer with UAC elevation
- Load-based server recommendation (no sticky sessions)
- Best Server one-click connection workflow

1 files changed, 74 insertions, 0 deletions

diff --git a/cmd/installer/elevate_windows.go b/cmd/installer/elevate_windows.go
new file mode 100644
index 0000000..f174390
--- /dev/null
+++ b/cmd/installer/elevate_windows.go
@@ -0,0 +1,74 @@
+//go:build windows
+
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+var (
+	shell32            = syscall.NewLazyDLL("shell32.dll")
+	shellExecuteW      = shell32.NewProc("ShellExecuteW")
+	isUserAnAdminProc  = shell32.NewProc("IsUserAnAdmin")
+	errCancelledByUser = uintptr(1223)
+)
+
+func isElevated() bool {
+	ret, _, _ := isUserAnAdminProc.Call()
+	return ret != 0
+}
+
+func relaunchElevated() error {
+	exePath, err := os.Executable()
+	if err != nil {
+		return err
+	}
+
+	verb, err := syscall.UTF16PtrFromString("runas")
+	if err != nil {
+		return err
+	}
+	file, err := syscall.UTF16PtrFromString(exePath)
+	if err != nil {
+		return err
+	}
+	args, err := syscall.UTF16PtrFromString(joinWindowsArgs(os.Args[1:]))
+	if err != nil {
+		return err
+	}
+
+	ret, _, callErr := shellExecuteW.Call(
+		0,
+		uintptr(unsafe.Pointer(verb)),
+		uintptr(unsafe.Pointer(file)),
+		uintptr(unsafe.Pointer(args)),
+		0,
+		1,
+	)
+	if ret <= 32 {
+		if ret == errCancelledByUser {
+			return fmt.Errorf("administrator privileges were not granted")
+		}
+		if callErr != syscall.Errno(0) {
+			return fmt.Errorf("ShellExecuteW failed: %w", callErr)
+		}
+		return fmt.Errorf("ShellExecuteW failed with code %d", ret)
+	}
+	return nil
+}
+
+func joinWindowsArgs(args []string) string {
+	if len(args) == 0 {
+		return ""
+	}
+	quoted := make([]string, 0, len(args))
+	for _, arg := range args {
+		escaped := strings.ReplaceAll(arg, `"`, `\"`)
+		quoted = append(quoted, `"`+escaped+`"`)
+	}
+	return strings.Join(quoted, " ")
+}