BPF_WORDALIGN
return (BPF_WORDALIGN(hdrlen + SIZEOF_BPF_HDR) - hdrlen);
curlen = BPF_WORDALIGN(d->bd_slen);
iface->buffer_pos += BPF_WORDALIGN(packet.bh_hdrlen +
bp += BPF_WORDALIGN(hdrlen + caplen);
bp += BPF_WORDALIGN(hdrlen + caplen);
bp += BPF_WORDALIGN(caplen + hdrlen);