func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
	return networkLinkIpAction(
		syscall.RTM_NEWADDR,
		syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK,
		IfAddr{iface, ip, ipNet},
	)
}
func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
	return networkLinkIpAction(
		syscall.RTM_NEWADDR,
		syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK,
		IfAddr{iface, ip, ipNet},
	)
}
// Add an Ip address to an interface. This is identical to:
// ip addr add $ip/$ipNet dev $iface