LWTUNNEL_IP6_ID
if (tb[LWTUNNEL_IP6_ID])
tun_info->key.tun_id = nla_get_be64(tb[LWTUNNEL_IP6_ID]);
if (nla_put_be64(skb, LWTUNNEL_IP6_ID, tun_info->key.tun_id,
[LWTUNNEL_IP6_ID] = { .type = NLA_U64 },