Can someone please help me with this?
----------------------------------------
> From: superj_2004@xxxxxxxxxxx
> To: netfilter-devel@xxxxxxxxxxxxxxx
> Subject: Question about using "Expect" from Netfilter hook
> Date: Thu, 29 Jul 2010 13:58:03 -0400
>
>
> Hello!,
>
> Is it possible to work with "expect" from a netfilter hook (not from a
> conntrack helper)?
>
> When I run the code below, I get:
>
> BUG: unable to handle kernel NULL pointer dereference at (null)
> IP [] nf_ct_expect_related_report+0x63/0x427
> *pde = 3df8d067
> Oops: 000 [#1] SMP
>
> ------
>
> int np_exp(struct nf_conn *ct){
> struct nf_conntrack_expect *exp;
> struct nf_conntrack_tuple *tuple;
>
> exp = nf_ct_expect_alloc(ct);
> if(exp == NULL){
> printk("Couldn't allocate exp!\n");
> return -1;
> }
>
> tuple = &ct->tuplehash[IP_CT_DIR_REPLY].tuple;
>
> nf_ct_expect_init(exp, NF_CT_EXPECT_CLASS_DEFAULT, nf_ct_l3num(ct),
> &tuple->src.u3, &tuple->dst.u3, IPPROTO_TCP,
> NULL, &tuple->dst.u.tcp.port);
>
> nf_ct_expect_put(exp);
>
> return 1;
> }
>
> hook_func(...){
> if(!(conntrack = nf_ct_get(sock_buff, &ctinfo)) ||
> !(master_conntrack = nf_ct_get(skb, &master_ctinfo))){
> spin_unlock_bh(&np_lock);
> return NF_ACCEPT; /* Couldn't get conntrack */
> }
>
> np_exp(conntrack);
> }
>
> _________________________________________________________________
> Hotmail: Powerful Free email with security by Microsoft.
> https://signup.live.com/signup.aspx?id=60969--
> To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
> the body of a message to majordomo@xxxxxxxxxxxxxxx
> More majordomo info at http://vger.kernel.org/majordomo-info.html
--
To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
