SCTP_IPIF_USABLE
SCTP_IPIF_USABLE(sctp_ipif->sctp_ipif_state)) {
if (!SCTP_IPIF_USABLE(ipif->sctp_ipif_state))
!SCTP_IPIF_USABLE(sctp_ipif->sctp_ipif_state) ||
!SCTP_IPIF_USABLE(sctp_ipif->sctp_ipif_state) ||