RXWBFLAG_IPV4
if (!(flags & (RXWBFLAG_TCPON | RXWBFLAG_UDPON | RXWBFLAG_IPV4)))
if (flags & RXWBFLAG_IPV4)
if (flags & RXWBFLAG_IPV4)
if (unlikely((flags & (RXWBFLAG_IPV4 | RXWBFLAG_IPCS))
== RXWBFLAG_IPV4)) {