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Linux/include/net/netfilter/nf_nat_l3proto.h

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  1 #ifndef _NF_NAT_L3PROTO_H
  2 #define _NF_NAT_L3PROTO_H
  3 
  4 struct nf_nat_l4proto;
  5 struct nf_nat_l3proto {
  6         u8      l3proto;
  7 
  8         bool    (*in_range)(const struct nf_conntrack_tuple *t,
  9                             const struct nf_nat_range *range);
 10 
 11         u32     (*secure_port)(const struct nf_conntrack_tuple *t, __be16);
 12 
 13         bool    (*manip_pkt)(struct sk_buff *skb,
 14                              unsigned int iphdroff,
 15                              const struct nf_nat_l4proto *l4proto,
 16                              const struct nf_conntrack_tuple *target,
 17                              enum nf_nat_manip_type maniptype);
 18 
 19         void    (*csum_update)(struct sk_buff *skb, unsigned int iphdroff,
 20                                __sum16 *check,
 21                                const struct nf_conntrack_tuple *t,
 22                                enum nf_nat_manip_type maniptype);
 23 
 24         void    (*csum_recalc)(struct sk_buff *skb, u8 proto,
 25                                void *data, __sum16 *check,
 26                                int datalen, int oldlen);
 27 
 28         void    (*decode_session)(struct sk_buff *skb,
 29                                   const struct nf_conn *ct,
 30                                   enum ip_conntrack_dir dir,
 31                                   unsigned long statusbit,
 32                                   struct flowi *fl);
 33 
 34         int     (*nlattr_to_range)(struct nlattr *tb[],
 35                                    struct nf_nat_range *range);
 36 };
 37 
 38 extern int nf_nat_l3proto_register(const struct nf_nat_l3proto *);
 39 extern void nf_nat_l3proto_unregister(const struct nf_nat_l3proto *);
 40 extern const struct nf_nat_l3proto *__nf_nat_l3proto_find(u8 l3proto);
 41 
 42 extern int nf_nat_icmp_reply_translation(struct sk_buff *skb,
 43                                          struct nf_conn *ct,
 44                                          enum ip_conntrack_info ctinfo,
 45                                          unsigned int hooknum);
 46 extern int nf_nat_icmpv6_reply_translation(struct sk_buff *skb,
 47                                            struct nf_conn *ct,
 48                                            enum ip_conntrack_info ctinfo,
 49                                            unsigned int hooknum,
 50                                            unsigned int hdrlen);
 51 
 52 #endif /* _NF_NAT_L3PROTO_H */
 53 

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