include/net/netfilter/nf_nat_l3proto.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _NF_NAT_L3PROTO_H
   3 #define _NF_NAT_L3PROTO_H
   4
   5 struct nf_nat_l4proto;
   6 struct nf_nat_l3proto {
   7         u8      l3proto;
   8
   9         bool    (*in_range)(const struct nf_conntrack_tuple *t,
  10                             const struct nf_nat_range2 *range);
  11
  12         u32     (*secure_port)(const struct nf_conntrack_tuple *t, __be16);
  13
  14         bool    (*manip_pkt)(struct sk_buff *skb,
  15                              unsigned int iphdroff,
  16                              const struct nf_nat_l4proto *l4proto,
  17                              const struct nf_conntrack_tuple *target,
  18                              enum nf_nat_manip_type maniptype);
  19
  20         void    (*csum_update)(struct sk_buff *skb, unsigned int iphdroff,
  21                                __sum16 *check,
  22                                const struct nf_conntrack_tuple *t,
  23                                enum nf_nat_manip_type maniptype);
  24
  25         void    (*csum_recalc)(struct sk_buff *skb, u8 proto,
  26                                void *data, __sum16 *check,
  27                                int datalen, int oldlen);
  28
  29         void    (*decode_session)(struct sk_buff *skb,
  30                                   const struct nf_conn *ct,
  31                                   enum ip_conntrack_dir dir,
  32                                   unsigned long statusbit,
  33                                   struct flowi *fl);
  34
  35         int     (*nlattr_to_range)(struct nlattr *tb[],
  36                                    struct nf_nat_range2 *range);
  37 };
  38
  39 int nf_nat_l3proto_register(const struct nf_nat_l3proto *);
  40 void nf_nat_l3proto_unregister(const struct nf_nat_l3proto *);
  41 const struct nf_nat_l3proto *__nf_nat_l3proto_find(u8 l3proto);
  42
  43 int nf_nat_icmp_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
  44                                   enum ip_conntrack_info ctinfo,
  45                                   unsigned int hooknum);
  46
  47 int nf_nat_icmpv6_reply_translation(struct sk_buff *skb, struct nf_conn *ct,
  48                                     enum ip_conntrack_info ctinfo,
  49                                     unsigned int hooknum, unsigned int hdrlen);
  50
  51 int nf_nat_l3proto_ipv4_register_fn(struct net *net, const struct nf_hook_ops *ops);
  52 void nf_nat_l3proto_ipv4_unregister_fn(struct net *net, const struct nf_hook_ops *ops);
  53
  54 int nf_nat_l3proto_ipv6_register_fn(struct net *net, const struct nf_hook_ops *ops);
  55 void nf_nat_l3proto_ipv6_unregister_fn(struct net *net, const struct nf_hook_ops *ops);
  56
  57 #endif /* _NF_NAT_L3PROTO_H */