NFTA_RT_KEY
[NFTA_RT_KEY] = NLA_POLICY_MAX(NLA_BE32, 255),
if (tb[NFTA_RT_KEY] == NULL ||
priv->key = ntohl(nla_get_be32(tb[NFTA_RT_KEY]));
if (nla_put_be32(skb, NFTA_RT_KEY, htonl(priv->key)))