3 #include <linux/netfilter_ipv4.h>
4 #include <net/netfilter/nf_conntrack_tuple.h>
6 #define NF_NAT_MAPPING_TYPE_MAX_NAMELEN 16
14 /* SRC manip occurs POST_ROUTING or LOCAL_IN */
15 #define HOOK2MANIP(hooknum) ((hooknum) != NF_IP_POST_ROUTING && (hooknum) != NF_IP_LOCAL_IN)
17 #define IP_NAT_RANGE_MAP_IPS 1
18 #define IP_NAT_RANGE_PROTO_SPECIFIED 2
19 #define IP_NAT_RANGE_PROTO_RANDOM 4
21 /* NAT sequence number modifications */
23 /* position of the last TCP sequence number modification (if any) */
24 u_int32_t correction_pos;
26 /* sequence number offset before and after last modification */
27 int16_t offset_before, offset_after;
30 /* Single range specification. */
33 /* Set to OR of flags above. */
36 /* Inclusive: network order. */
37 __be32 min_ip, max_ip;
39 /* Inclusive: network order */
40 union nf_conntrack_man_proto min, max;
43 /* For backwards compat: don't use in modern code. */
44 struct nf_nat_multi_range_compat
46 unsigned int rangesize; /* Must be 1. */
49 struct nf_nat_range range[1];
53 #include <linux/list.h>
54 #include <linux/netfilter/nf_conntrack_pptp.h>
55 #include <net/netfilter/nf_conntrack_extend.h>
59 /* The structure embedded in the conntrack structure. */
62 struct list_head bysource;
63 struct nf_nat_seq seq[IP_CT_DIR_MAX];
67 /* per conntrack: nat application helper private data */
68 union nf_conntrack_nat_help
70 /* insert nat helper private data here */
71 struct nf_nat_pptp nat_pptp_info;
76 struct nf_nat_info info;
77 union nf_conntrack_nat_help help;
78 #if defined(CONFIG_IP_NF_TARGET_MASQUERADE) || \
79 defined(CONFIG_IP_NF_TARGET_MASQUERADE_MODULE)
84 /* Set up the info structure to map into this range. */
85 extern unsigned int nf_nat_setup_info(struct nf_conn *ct,
86 const struct nf_nat_range *range,
87 unsigned int hooknum);
89 /* Is this tuple already taken? (not by us)*/
90 extern int nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
91 const struct nf_conn *ignored_conntrack);
93 static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
95 return nf_ct_ext_find(ct, NF_CT_EXT_NAT);
98 #else /* !__KERNEL__: iptables wants this to compile. */
99 #define nf_nat_multi_range nf_nat_multi_range_compat
100 #endif /*__KERNEL__*/