skb_ip_make_writable has been renamed to skb_make_writable in more recent kernels: --- net/ipv4/netfilter/ipt_XOR.c~ 2005-12-21 17:36:53.000000000 +0100 +++ net/ipv4/netfilter/ipt_XOR.c 2005-12-21 17:37:11.000000000 +0100 @@ -31,7 +31,7 @@ struct udphdr *udph; int i, j, k; - if (!skb_ip_make_writable(pskb, (*pskb)->len)) + if (!skb_make_writable(pskb, (*pskb)->len)) return NF_DROP; iph = (*pskb)->nh.iph; -- damjan | дамјан This is my jabber ID --> damjan@xxxxxxxxxxxx <-- not my mail address!!!