NFTA_CT_HELPER_L4PROTO
if (!tb[NFTA_CT_HELPER_NAME] || !tb[NFTA_CT_HELPER_L4PROTO])
priv->l4proto = nla_get_u8(tb[NFTA_CT_HELPER_L4PROTO]);
if (nla_put_u8(skb, NFTA_CT_HELPER_L4PROTO, priv->l4proto))
[NFTA_CT_HELPER_L4PROTO] = { .type = NLA_U8 },