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git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - net/netfilter/xt_NOTRACK.c
1 /* This is a module which is used for setting up fake conntracks
2 * on packets so that they are not seen by the conntrack/NAT code.
4 #include <linux/module.h>
5 #include <linux/skbuff.h>
7 #include <linux/netfilter/x_tables.h>
8 #include <net/netfilter/nf_conntrack.h>
10 MODULE_DESCRIPTION("Xtables: Disabling connection tracking for packets");
11 MODULE_LICENSE("GPL");
12 MODULE_ALIAS("ipt_NOTRACK");
13 MODULE_ALIAS("ip6t_NOTRACK");
16 notrack_tg(struct sk_buff
*skb
, const struct net_device
*in
,
17 const struct net_device
*out
, unsigned int hooknum
,
18 const struct xt_target
*target
, const void *targinfo
)
20 /* Previously seen (loopback)? Ignore. */
21 if (skb
->nfct
!= NULL
)
24 /* Attach fake conntrack entry.
25 If there is a real ct entry correspondig to this packet,
26 it'll hang aroun till timing out. We don't deal with it
27 for performance reasons. JK */
28 skb
->nfct
= &nf_conntrack_untracked
.ct_general
;
29 skb
->nfctinfo
= IP_CT_NEW
;
30 nf_conntrack_get(skb
->nfct
);
35 static struct xt_target notrack_tg_reg
[] __read_mostly
= {
38 .family
= NFPROTO_IPV4
,
45 .family
= NFPROTO_IPV6
,
52 static int __init
notrack_tg_init(void)
54 return xt_register_targets(notrack_tg_reg
, ARRAY_SIZE(notrack_tg_reg
));
57 static void __exit
notrack_tg_exit(void)
59 xt_unregister_targets(notrack_tg_reg
, ARRAY_SIZE(notrack_tg_reg
));
62 module_init(notrack_tg_init
);
63 module_exit(notrack_tg_exit
);