+ /* Weed out funny packets (e.g., AF_PACKET or raw). */
+ if (skb->len < ETH_HLEN + sizeof(struct iphdr))
+ goto non_ip;
+ skb_set_network_header(skb, ETH_HLEN);
+ if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5)
+ goto non_ip;
+