RPL_IPTUNNEL_SRH
if (nla_put_rpl_srh(skb, RPL_IPTUNNEL_SRH, tuninfo))
[RPL_IPTUNNEL_SRH] = { .type = NLA_BINARY },
if (!tb[RPL_IPTUNNEL_SRH])
srh = nla_data(tb[RPL_IPTUNNEL_SRH]);
srh_len = nla_len(tb[RPL_IPTUNNEL_SRH]);