release/src-rt-6.x.4708/linux/linux-2.6.36/include/net/netfilter/nf_nat_core.h

   1 #ifndef _NF_NAT_CORE_H
   2 #define _NF_NAT_CORE_H
   3 #include <linux/list.h>
   4 #include <net/netfilter/nf_conntrack.h>
   5 #include <net/netfilter/nf_nat.h>
   6
   7 /* This header used to share core functionality between the standalone
   8    NAT module, and the compatibility layer's use of NAT for masquerading. */
   9
  10 extern unsigned int nf_nat_packet(struct nf_conn *ct,
  11                                   enum ip_conntrack_info ctinfo,
  12                                   unsigned int hooknum,
  13                                   struct sk_buff *skb);
  14
  15 extern int nf_nat_icmp_reply_translation(struct nf_conn *ct,
  16                                          enum ip_conntrack_info ctinfo,
  17                                          unsigned int hooknum,
  18                                          struct sk_buff *skb);
  19
  20 static inline int nf_nat_initialized(struct nf_conn *ct,
  21                                      enum nf_nat_manip_type manip)
  22 {
  23         if (manip == IP_NAT_MANIP_SRC)
  24                 return test_bit(IPS_SRC_NAT_DONE_BIT, &ct->status);
  25         else
  26                 return test_bit(IPS_DST_NAT_DONE_BIT, &ct->status);
  27 }
  28
  29 struct nlattr;
  30
  31 extern int
  32 (*nfnetlink_parse_nat_setup_hook)(struct nf_conn *ct,
  33                                   enum nf_nat_manip_type manip,
  34                                   const struct nlattr *attr);
  35
  36 #endif /* _NF_NAT_CORE_H */