netlink/netlink_linux.go
func NetworkChangeName(iface *net.Interface, newName string) error {
	if len(newName) >= IFNAMSIZ {
		return fmt.Errorf("Interface name %s too long", newName)
	}

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

	wb := newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)

	msg := newIfInfomsg(syscall.AF_UNSPEC)
	msg.Index = int32(iface.Index)
	msg.Change = DEFAULT_CHANGE
	wb.AddData(msg)

	nameData := newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(newName))
	wb.AddData(nameData)

	if err := s.Send(wb); err != nil {
		return err
	}

	return s.HandleAck(wb.Seq)
}
func NetworkChangeName(iface *net.Interface, newName string) error {
	if len(newName) >= IFNAMSIZ {
		return fmt.Errorf("Interface name %s too long", newName)
	}

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

	wb := newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)

	msg := newIfInfomsg(syscall.AF_UNSPEC)
	msg.Index = int32(iface.Index)
	msg.Change = DEFAULT_CHANGE
	wb.AddData(msg)

	nameData := newRtAttr(syscall.IFLA_IFNAME, zeroTerminated(newName))
	wb.AddData(nameData)

	if err := s.Send(wb); err != nil {
		return err
	}

	return s.HandleAck(wb.Seq)
}
// Rename a particular interface to a different name
// !!! Note that you can't rename an active interface. You need to bring it down before renaming it.
// This is identical to running: ip link set dev ${oldName} name ${newName}