include/linux/netfilter_ipv4.h

   1 /* IPv4-specific defines for netfilter.
   2  * (C)1998 Rusty Russell -- This code is GPL.
   3  */
   4 #ifndef __LINUX_IP_NETFILTER_H
   5 #define __LINUX_IP_NETFILTER_H
   6
   7 #include <uapi/linux/netfilter_ipv4.h>
   8
   9 /* Extra routing may needed on local out, as the QUEUE target never returns
  10  * control to the table.
  11  */
  12 struct ip_rt_info {
  13         __be32 daddr;
  14         __be32 saddr;
  15         u_int8_t tos;
  16         u_int32_t mark;
  17 };
  18
  19 int ip_route_me_harder(struct net *net, struct sk_buff *skb, unsigned addr_type);
  20
  21 struct nf_queue_entry;
  22
  23 #ifdef CONFIG_INET
  24 __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
  25                        unsigned int dataoff, u_int8_t protocol);
  26 __sum16 nf_ip_checksum_partial(struct sk_buff *skb, unsigned int hook,
  27                                unsigned int dataoff, unsigned int len,
  28                                u_int8_t protocol);
  29 int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
  30                 bool strict);
  31 int nf_ip_reroute(struct sk_buff *skb, const struct nf_queue_entry *entry);
  32 #else
  33 static inline __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
  34                                      unsigned int dataoff, u_int8_t protocol)
  35 {
  36         return 0;
  37 }
  38 static inline __sum16 nf_ip_checksum_partial(struct sk_buff *skb,
  39                                              unsigned int hook,
  40                                              unsigned int dataoff,
  41                                              unsigned int len,
  42                                              u_int8_t protocol)
  43 {
  44         return 0;
  45 }
  46 static inline int nf_ip_route(struct net *net, struct dst_entry **dst,
  47                               struct flowi *fl, bool strict)
  48 {
  49         return -EOPNOTSUPP;
  50 }
  51 static inline int nf_ip_reroute(struct sk_buff *skb,
  52                                 const struct nf_queue_entry *entry)
  53 {
  54         return -EOPNOTSUPP;
  55 }
  56 #endif /* CONFIG_INET */
  57
  58 #endif /*__LINUX_IP_NETFILTER_H*/