FDDI_K_SNAP_HLEN
if (skb->len < FDDI_K_SNAP_HLEN)
skb_pull(skb, FDDI_K_SNAP_HLEN); /* adjust for 21 byte header */
dev->hard_header_len = FDDI_K_SNAP_HLEN+3; /* Assume 802.2 SNAP hdr len + 3 pad bytes */
dev->min_mtu = FDDI_K_SNAP_HLEN;
int hl = FDDI_K_SNAP_HLEN;