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
7 struct sk_buff;
8
9 /* These return true or false. */
10 int __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
nf_nat_mangle_tcp_packet(struct sk_buff * skb,struct nf_conn * ct,enum ip_conntrack_info ctinfo,unsigned int protoff,unsigned int match_offset,unsigned int match_len,const char * rep_buffer,unsigned int rep_len)16 static 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
30 int 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. */
38 void nf_nat_follow_master(struct nf_conn *ct, struct nf_conntrack_expect *this);
39
40 #endif
41