ITPF_I_TUNNEL
ITPF_I_TUNNEL;
itp->itp_flags & ITPF_I_TUNNEL;
(active ? ITPF_P_TUNNEL : ITPF_I_TUNNEL);
(((itp)->itp_policy == (iph)) ? ITPF_P_TUNNEL : ITPF_I_TUNNEL))