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. */ 10extern int nf_nat_mangle_tcp_packet(struct sk_buff **skb, 11 struct nf_conn *ct, 12 enum ip_conntrack_info ctinfo, 13 unsigned int match_offset, 14 unsigned int match_len, 15 const char *rep_buffer, 16 unsigned int rep_len); 17extern int nf_nat_mangle_udp_packet(struct sk_buff **skb, 18 struct nf_conn *ct, 19 enum ip_conntrack_info ctinfo, 20 unsigned int match_offset, 21 unsigned int match_len, 22 const char *rep_buffer, 23 unsigned int rep_len); 24extern int nf_nat_seq_adjust(struct sk_buff **pskb, 25 struct nf_conn *ct, 26 enum ip_conntrack_info ctinfo); 27 28/* Setup NAT on this expected conntrack so it follows master, but goes 29 * to port ct->master->saved_proto. */ 30extern void nf_nat_follow_master(struct nf_conn *ct, 31 struct nf_conntrack_expect *this); 32#endif 33