projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* Header for use in defining a given protocol. */ |
| 2 | #ifndef _IP_NAT_PROTOCOL_H | |
| 3 | #define _IP_NAT_PROTOCOL_H | |
| 4 | #include <linux/init.h> | |
| 5 | #include <linux/list.h> | |
| 6 | ||
| 080774a2 HW |
7 | #include <linux/netfilter_ipv4/ip_nat.h> |
| 8 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
| 9 | ||
| 1da177e4 LT |
10 | struct iphdr; |
| 11 | struct ip_nat_range; | |
| 12 | ||
| 13 | struct ip_nat_protocol | |
| 14 | { | |
| 15 | /* Protocol name */ | |
| 16 | const char *name; | |
| 17 | ||
| 18 | /* Protocol number. */ | |
| 19 | unsigned int protonum; | |
| 20 | ||
| 080774a2 HW |
21 | struct module *me; |
| 22 | ||
| 1da177e4 LT |
23 | /* Translate a packet to the target according to manip type. |
| 24 | Return true if succeeded. */ | |
| 25 | int (*manip_pkt)(struct sk_buff **pskb, | |
| 26 | unsigned int iphdroff, | |
| 27 | const struct ip_conntrack_tuple *tuple, | |
| 28 | enum ip_nat_manip_type maniptype); | |
| 29 | ||
| 30 | /* Is the manipable part of the tuple between min and max incl? */ | |
| 31 | int (*in_range)(const struct ip_conntrack_tuple *tuple, | |
| 32 | enum ip_nat_manip_type maniptype, | |
| 33 | const union ip_conntrack_manip_proto *min, | |
| 34 | const union ip_conntrack_manip_proto *max); | |
| 35 | ||
| 36 | /* Alter the per-proto part of the tuple (depending on | |
| 37 | maniptype), to give a unique tuple in the given range if | |
| 38 | possible; return false if not. Per-protocol part of tuple | |
| 39 | is initialized to the incoming packet. */ | |
| 40 | int (*unique_tuple)(struct ip_conntrack_tuple *tuple, | |
| 41 | const struct ip_nat_range *range, | |
| 42 | enum ip_nat_manip_type maniptype, | |
| 43 | const struct ip_conntrack *conntrack); | |
| 44 | ||
| 45 | unsigned int (*print)(char *buffer, | |
| 46 | const struct ip_conntrack_tuple *match, | |
| 47 | const struct ip_conntrack_tuple *mask); | |
| 48 | ||
| 49 | unsigned int (*print_range)(char *buffer, | |
| 50 | const struct ip_nat_range *range); | |
| 1da177e4 | 51 | |
| 080774a2 HW |
52 | int (*range_to_nfattr)(struct sk_buff *skb, |
| 53 | const struct ip_nat_range *range); | |
| 54 | ||
| 55 | int (*nfattr_to_range)(struct nfattr *tb[], | |
| 56 | struct ip_nat_range *range); | |
| 57 | }; | |
| 1da177e4 LT |
58 | |
| 59 | /* Protocol registration. */ | |
| 60 | extern int ip_nat_protocol_register(struct ip_nat_protocol *proto); | |
| 61 | extern void ip_nat_protocol_unregister(struct ip_nat_protocol *proto); | |
| 62 | ||
| 080774a2 HW |
63 | extern struct ip_nat_protocol *ip_nat_proto_find_get(u_int8_t protocol); |
| 64 | extern void ip_nat_proto_put(struct ip_nat_protocol *proto); | |
| 1da177e4 LT |
65 | |
| 66 | /* Built-in protocols. */ | |
| 67 | extern struct ip_nat_protocol ip_nat_protocol_tcp; | |
| 68 | extern struct ip_nat_protocol ip_nat_protocol_udp; | |
| 69 | extern struct ip_nat_protocol ip_nat_protocol_icmp; | |
| 70 | extern struct ip_nat_protocol ip_nat_unknown_protocol; | |
| 71 | ||
| 72 | extern int init_protocols(void) __init; | |
| 73 | extern void cleanup_protocols(void); | |
| 74 | extern struct ip_nat_protocol *find_nat_proto(u_int16_t protonum); | |
| 75 | ||
| 080774a2 HW |
76 | extern int ip_nat_port_range_to_nfattr(struct sk_buff *skb, |
| 77 | const struct ip_nat_range *range); | |
| 78 | extern int ip_nat_port_nfattr_to_range(struct nfattr *tb[], | |
| 79 | struct ip_nat_range *range); | |
| 80 | ||
| 1da177e4 | 81 | #endif /*_IP_NAT_PROTO_H*/ |