nbp_hdr
extern void interpret_nbp(int, struct nbp_hdr *, int);
interpret_nbp(flags, (struct nbp_hdr *)ddp, ddplen);
interpret_nbp(int flags, struct nbp_hdr *nbp, int len)
if (len < sizeof (struct nbp_hdr)) {
if (len < sizeof (struct nbp_hdr)) {