git://bbs.cooldavid.org / net-next-2.6.git / blame
| Commit | Line | Data |
|---|---|---|
| 5b1158e9 JK |
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. */ | |
| 010c0b9f PM |
10 | extern 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, bool adjust); | |
| 17 | ||
| 18 | static inline int nf_nat_mangle_tcp_packet(struct sk_buff *skb, | |
| 19 | struct nf_conn *ct, | |
| 20 | enum ip_conntrack_info ctinfo, | |
| 21 | unsigned int match_offset, | |
| 22 | unsigned int match_len, | |
| 23 | const char *rep_buffer, | |
| 24 | unsigned int rep_len) | |
| 25 | { | |
| 26 | return __nf_nat_mangle_tcp_packet(skb, ct, ctinfo, | |
| 27 | match_offset, match_len, | |
| 28 | rep_buffer, rep_len, true); | |
| 29 | } | |
| 30 | ||
| 3db05fea | 31 | extern int nf_nat_mangle_udp_packet(struct sk_buff *skb, |
| 5b1158e9 JK |
32 | struct nf_conn *ct, |
| 33 | enum ip_conntrack_info ctinfo, | |
| 34 | unsigned int match_offset, | |
| 35 | unsigned int match_len, | |
| 36 | const char *rep_buffer, | |
| 37 | unsigned int rep_len); | |
| 010c0b9f PM |
38 | |
| 39 | extern void nf_nat_set_seq_adjust(struct nf_conn *ct, | |
| 40 | enum ip_conntrack_info ctinfo, | |
| 41 | __be32 seq, s16 off); | |
| 3db05fea | 42 | extern int nf_nat_seq_adjust(struct sk_buff *skb, |
| 5b1158e9 JK |
43 | struct nf_conn *ct, |
| 44 | enum ip_conntrack_info ctinfo); | |
| dd13b010 PM |
45 | extern int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb, |
| 46 | struct nf_conn *ct, | |
| 47 | enum ip_conntrack_info ctinfo); | |
| 5b1158e9 JK |
48 | |
| 49 | /* Setup NAT on this expected conntrack so it follows master, but goes | |
| 50 | * to port ct->master->saved_proto. */ | |
| 51 | extern void nf_nat_follow_master(struct nf_conn *ct, | |
| 52 | struct nf_conntrack_expect *this); | |
| f9dd09c7 JK |
53 | |
| 54 | extern s16 nf_nat_get_offset(const struct nf_conn *ct, | |
| 55 | enum ip_conntrack_dir dir, | |
| 56 | u32 seq); | |
| 5b1158e9 | 57 | #endif |