func CreateBridge(name string, setMacAddr bool) error {
	if len(name) >= IFNAMSIZ {
		return fmt.Errorf("Interface name %s too long", name)
	}

	s, err := getIfSocket()
	if err != nil {
		return err
	}
	defer syscall.Close(s)

	nameBytePtr, err := syscall.BytePtrFromString(name)
	if err != nil {
		return err
	}
	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, uintptr(s), SIOC_BRADDBR, uintptr(unsafe.Pointer(nameBytePtr))); err != 0 {
		return err
	}
	if setMacAddr {
		return SetMacAddress(name, randMacAddr())
	}
	return nil
}
func CreateBridge(name string, setMacAddr bool) error {
	if len(name) >= IFNAMSIZ {
		return fmt.Errorf("Interface name %s too long", name)
	}

	s, err := getIfSocket()
	if err != nil {
		return err
	}
	defer syscall.Close(s)

	nameBytePtr, err := syscall.BytePtrFromString(name)
	if err != nil {
		return err
	}
	if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, uintptr(s), SIOC_BRADDBR, uintptr(unsafe.Pointer(nameBytePtr))); err != 0 {
		return err
	}
	if setMacAddr {
		return SetMacAddress(name, randMacAddr())
	}
	return nil
}
// Create the actual bridge device.  This is more backward-compatible than
// netlink.NetworkLinkAdd and works on RHEL 6.