print_etherinfo
src_name = print_etherinfo(&f->shost);
dst_name = print_etherinfo(&f->dhost);
static char *print_etherinfo();
print_etherinfo(&f->dhost));
print_etherinfo(&f->shost));
print_etherinfo(&e->ether_dhost));
print_etherinfo(&e->ether_shost));
src_name = print_etherinfo(&mh->shost);
dst_name = print_etherinfo(&mh->dhost);
print_etherinfo(&mh->dhost));
print_etherinfo(&mh->shost));