mwltxrec
struct mwltxrec *tr;
if (hdrlen < sizeof(struct mwltxrec)) {
const int space = sizeof(struct mwltxrec) - hdrlen;
tr = mtod(m0, struct mwltxrec *);
tr = mtod(m0, struct mwltxrec *);
const struct mwltxrec *tr =
mtod(bf->bf_m, const struct mwltxrec *);
ic->ic_headroom = sizeof(struct mwltxrec) -