TCA_ROUTE4_IIF
[TCA_ROUTE4_IIF] = NLA_POLICY_MAX(NLA_U32, 0x7FFF),
if (tb[TCA_ROUTE4_FROM] && tb[TCA_ROUTE4_IIF]) {
} else if (tb[TCA_ROUTE4_IIF]) {
id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
else if (tb[TCA_ROUTE4_IIF])
nla_put_u32(skb, TCA_ROUTE4_IIF, f->iif))