root/include/linux/netfilter_ipv4.h

INCLUDED FROM

DEFINITIONS

1. nf_ip_checksum
2. nf_ip_route

   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 int nf_ip_route(struct net *net, struct dst_entry **dst, struct flowi *fl,
  27                 bool strict);
  28 #else
  29 static inline __sum16 nf_ip_checksum(struct sk_buff *skb, unsigned int hook,
  30                                      unsigned int dataoff, u_int8_t protocol)
  31 {
  32         return 0;
  33 }
  34 static inline int nf_ip_route(struct net *net, struct dst_entry **dst,
  35                               struct flowi *fl, bool strict)
  36 {
  37         return -EOPNOTSUPP;
  38 }
  39 #endif /* CONFIG_INET */
  40 
  41 #endif /*__LINUX_IP_NETFILTER_H*/