if_setcapabilities2bit
if_setcapabilities2bit(ifp, IFCAP2_BIT(IFCAP2_RXTLS4) |
if_setcapabilities2bit(ifp, IFCAP2_BIT(IFCAP2_IPSEC_OFFLOAD),
int if_setcapabilities2bit(if_t ifp, int setbit, int clearbit);