PF_POLICY
int sfd = socket(PF_POLICY, SOCK_RAW, PF_POLICY_V1);
int sfd = socket(PF_POLICY, SOCK_RAW, PF_POLICY_V1);
int s = socket(PF_POLICY, SOCK_RAW, PF_POLICY_V1);
.me_domain = PF_POLICY,
.me_domain = PF_POLICY,
.sp_dom = PF_POLICY,
keysock_spdsock_wput_iocdata(q, mp, PF_POLICY);