include/linux/netfilter_ipv6.h

   1 /* IPv6-specific defines for netfilter.
   2  * (C)1998 Rusty Russell -- This code is GPL.
   3  * (C)1999 David Jeffery
   4  *   this header was blatantly ripped from netfilter_ipv4.h
   5  *   it's amazing what adding a bunch of 6s can do =8^)
   6  */
   7 #ifndef __LINUX_IP6_NETFILTER_H
   8 #define __LINUX_IP6_NETFILTER_H
   9
  10 #include <uapi/linux/netfilter_ipv6.h>
  11
  12 /* Extra routing may needed on local out, as the QUEUE target never returns
  13  * control to the table.
  14  */
  15 struct ip6_rt_info {
  16         struct in6_addr daddr;
  17         struct in6_addr saddr;
  18         u_int32_t mark;
  19 };
  20
  21 struct nf_queue_entry;
  22
  23 /*
  24  * Hook functions for ipv6 to allow xt_* modules to be built-in even
  25  * if IPv6 is a module.
  26  */
  27 struct nf_ipv6_ops {
  28         int (*chk_addr)(struct net *net, const struct in6_addr *addr,
  29                         const struct net_device *dev, int strict);
  30         void (*route_input)(struct sk_buff *skb);
  31         int (*fragment)(struct net *net, struct sock *sk, struct sk_buff *skb,
  32                         int (*output)(struct net *, struct sock *, struct sk_buff *));
  33         __sum16 (*checksum)(struct sk_buff *skb, unsigned int hook,
  34                             unsigned int dataoff, u_int8_t protocol);
  35         __sum16 (*checksum_partial)(struct sk_buff *skb, unsigned int hook,
  36                                     unsigned int dataoff, unsigned int len,
  37                                     u_int8_t protocol);
  38         int (*route)(struct net *net, struct dst_entry **dst, struct flowi *fl,
  39                      bool strict);
  40         int (*reroute)(struct sk_buff *skb, const struct nf_queue_entry *entry);
  41 };
  42
  43 #ifdef CONFIG_NETFILTER
  44 int ip6_route_me_harder(struct net *net, struct sk_buff *skb);
  45 __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
  46                         unsigned int dataoff, u_int8_t protocol);
  47
  48 int ipv6_netfilter_init(void);
  49 void ipv6_netfilter_fini(void);
  50
  51 extern const struct nf_ipv6_ops __rcu *nf_ipv6_ops;
  52 static inline const struct nf_ipv6_ops *nf_get_ipv6_ops(void)
  53 {
  54         return rcu_dereference(nf_ipv6_ops);
  55 }
  56
  57 #else /* CONFIG_NETFILTER */
  58 static inline int ipv6_netfilter_init(void) { return 0; }
  59 static inline void ipv6_netfilter_fini(void) { return; }
  60 static inline const struct nf_ipv6_ops *nf_get_ipv6_ops(void) { return NULL; }
  61 #endif /* CONFIG_NETFILTER */
  62
  63 #endif /*__LINUX_IP6_NETFILTER_H*/