PULLUP_TO
PULLUP_TO(off + 4); /* XXX ? */
PULLUP_TO(off + 14);
PULLUP_TO(off + 4);
PULLUP_TO(off + 2);
PULLUP_TO(hlen + sizeof(struct tcphdr));
PULLUP_TO(hlen + sizeof(struct udphdr));
PULLUP_TO(hlen + 4); /* type, code and checksum. */
PULLUP_TO(hlen + sizeof(struct tcphdr));
PULLUP_TO(hlen + sizeof(struct udphdr));
PULLUP_TO(hlen + 4);