fix(wireguard): skip tun device checks when using kernelspace

internal/tun/check.go

@@ -1,41 +0,0 @@
-//go:build linux || darwin
-
-package tun
-
-import (
-	"errors"
-	"fmt"
-	"os"
-	"syscall"
-)
-
-// Check checks the tunnel device specified by path is present and accessible.
-func (t *Tun) Check(path string) error {
-	f, err := os.OpenFile(path, os.O_RDWR, 0)
-	if err != nil {
-		return fmt.Errorf("TUN device is not available: %w", err)
-	}
-	defer f.Close()
-
-	info, err := f.Stat()
-	if err != nil {
-		return fmt.Errorf("getting stat information for TUN file: %w", err)
-	}
-
-	sys, ok := info.Sys().(*syscall.Stat_t)
-	if !ok {
-		return errors.New("cannot get syscall stat info of TUN file")
-	}
-
-	const expectedRdev = 2760 // corresponds to major 10 and minor 200
-	if sys.Rdev != expectedRdev {
-		return fmt.Errorf("TUN file has an unexpected rdev: %d instead of expected %d",
-			sys.Rdev, expectedRdev)
-	}
-
-	if err := f.Close(); err != nil {
-		return fmt.Errorf("closing TUN device: %w", err)
-	}
-
-	return nil
-}