Hi, i am trying to get packet id from ip header. problem is that from dev.c level: int netif_rx(struct sk_buff *skb)) { /* original code */ printk("My id: %d and address %d\n", skb->nh.iph->id,skb->nh.iph->saddr); /* original code */ } ...it is impossible. I get oops saying that NULL pointer reference was found instead? So how can i get this "id" field aletrnatively (without calling skb-?nh.iph->id) ???? regards adam - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html