IPPROTO_PFSYNC
ip->ip_p = IPPROTO_PFSYNC;
CTL_NET, PF_INET, IPPROTO_PFSYNC, CTL_EOL);
CTL_NET, PF_INET, IPPROTO_PFSYNC,
(st->state_key->proto == IPPROTO_PFSYNC)) \
.pr_protocol = IPPROTO_PFSYNC,
CASERETURN(IPPROTO_PFSYNC);