3 #include <linux/rhashtable.h>
4 #include <linux/netfilter_ipv4.h>
5 #include <linux/netfilter/nf_nat.h>
6 #include <net/netfilter/nf_conntrack_tuple.h>
8 enum nf_nat_manip_type
{
13 /* SRC manip occurs POST_ROUTING or LOCAL_IN */
14 #define HOOK2MANIP(hooknum) ((hooknum) != NF_INET_POST_ROUTING && \
15 (hooknum) != NF_INET_LOCAL_IN)
17 #include <linux/list.h>
18 #include <linux/netfilter/nf_conntrack_pptp.h>
19 #include <net/netfilter/nf_conntrack_extend.h>
21 /* per conntrack: nat application helper private data */
22 union nf_conntrack_nat_help
{
23 /* insert nat helper private data here */
24 #if defined(CONFIG_NF_NAT_PPTP) || defined(CONFIG_NF_NAT_PPTP_MODULE)
25 struct nf_nat_pptp nat_pptp_info
;
31 /* The structure embedded in the conntrack structure. */
33 union nf_conntrack_nat_help help
;
34 #if IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV4) || \
35 IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV6)
40 /* Set up the info structure to map into this range. */
41 unsigned int nf_nat_setup_info(struct nf_conn
*ct
,
42 const struct nf_nat_range
*range
,
43 enum nf_nat_manip_type maniptype
);
45 extern unsigned int nf_nat_alloc_null_binding(struct nf_conn
*ct
,
46 unsigned int hooknum
);
48 struct nf_conn_nat
*nf_ct_nat_ext_add(struct nf_conn
*ct
);
50 /* Is this tuple already taken? (not by us)*/
51 int nf_nat_used_tuple(const struct nf_conntrack_tuple
*tuple
,
52 const struct nf_conn
*ignored_conntrack
);
54 static inline struct nf_conn_nat
*nfct_nat(const struct nf_conn
*ct
)
56 #if defined(CONFIG_NF_NAT) || defined(CONFIG_NF_NAT_MODULE)
57 return nf_ct_ext_find(ct
, NF_CT_EXT_NAT
);
63 static inline bool nf_nat_oif_changed(unsigned int hooknum
,
64 enum ip_conntrack_info ctinfo
,
65 struct nf_conn_nat
*nat
,
66 const struct net_device
*out
)
68 #if IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV4) || \
69 IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV6)
70 return nat
->masq_index
&& hooknum
== NF_INET_POST_ROUTING
&&
71 CTINFO2DIR(ctinfo
) == IP_CT_DIR_ORIGINAL
&&
72 nat
->masq_index
!= out
->ifindex
;