TCA_SKBMOD_DMAC
if (tb[TCA_SKBMOD_DMAC]) {
daddr = nla_data(tb[TCA_SKBMOD_DMAC]);
nla_put(skb, TCA_SKBMOD_DMAC, ETH_ALEN, p->eth_dst))
[TCA_SKBMOD_DMAC] = { .len = ETH_ALEN },