BIOCSDLT
if (ioctl(p->fd, BIOCSDLT, &new_dlt) != -1) {
if (ioctl(p->fd, BIOCSDLT, &dlt) == -1) {
if (dlt != (u_int) -1 && ioctl(fd, BIOCSDLT, &dlt)) {
if (dlt != (u_int) -1 && ioctl(fd, BIOCSDLT, &dlt)) {
case BIOCSDLT:
if (ioctl(bif0->bif_bpf, BIOCSDLT, &bd->bd_dlt) == -1) {
if (ioctl(bif->bif_bpf, BIOCSDLT, &bd->bd_dlt) == -1) {
if (ioctl(apme->a_raw, BIOCSDLT, &dlt) == -1)
if (dlt != (u_int) -1 && ioctl(fd, BIOCSDLT, &dlt) == -1)