1 #ifndef _NF_NAT_HELPER_H
2 #define _NF_NAT_HELPER_H
3 /* NAT protocol helper routines. */
5 #include <net/netfilter/nf_conntrack.h>
9 /* These return true or false. */
10 extern int nf_nat_mangle_tcp_packet(struct sk_buff
*skb
,
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
);
17 extern int nf_nat_mangle_udp_packet(struct sk_buff
*skb
,
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
);
24 extern int nf_nat_seq_adjust(struct sk_buff
*skb
,
26 enum ip_conntrack_info ctinfo
);
28 /* Setup NAT on this expected conntrack so it follows master, but goes
29 * to port ct->master->saved_proto. */
30 extern void nf_nat_follow_master(struct nf_conn
*ct
,
31 struct nf_conntrack_expect
*this);