LXR linux/include/net/netfilter/nf_nat

   1#ifndef _NF_NAT_HELPER_H
   2#define _NF_NAT_HELPER_H
   3/* NAT protocol helper routines. */
   4
   5#include <net/netfilter/nf_conntrack.h>
   6
   7struct sk_buff;
   8
   9/* These return true or false. */
  10int __nf_nat_mangle_tcp_packet(struct sk_buff *skb, struct nf_conn *ct,
  11                               enum ip_conntrack_info ctinfo,
  12                               unsigned int protoff, unsigned int match_offset,
  13                               unsigned int match_len, const char *rep_buffer,
  14                               unsigned int rep_len, bool adjust);
  15
  16static inline int nf_nat_mangle_tcp_packet(struct sk_buff *skb,
  17                                           struct nf_conn *ct,
  18                                           enum ip_conntrack_info ctinfo,
  19                                           unsigned int protoff,
  20                                           unsigned int match_offset,
  21                                           unsigned int match_len,
  22                                           const char *rep_buffer,
  23                                           unsigned int rep_len)
  24{
  25        return __nf_nat_mangle_tcp_packet(skb, ct, ctinfo, protoff,
  26                                          match_offset, match_len,
  27                                          rep_buffer, rep_len, true);
  28}
  29
  30int nf_nat_mangle_udp_packet(struct sk_buff *skb, struct nf_conn *ct,
  31                             enum ip_conntrack_info ctinfo,
  32                             unsigned int protoff, unsigned int match_offset,
  33                             unsigned int match_len, const char *rep_buffer,
  34                             unsigned int rep_len);
  35
  36/* Setup NAT on this expected conntrack so it follows master, but goes
  37 * to port ct->master->saved_proto. */
  38void nf_nat_follow_master(struct nf_conn *ct, struct nf_conntrack_expect *this);
  39
  40#endif
  41