swh:1:snp:32555a3fd8878f019c2ebd6c964bc1edcaeff337
Tip revision: c517d838eb7d07bbe9507871fab3931deccff539 authored by Linus Torvalds on 23 February 2015, 02:21:14 UTC
Linux 4.0-rc1
Linux 4.0-rc1
Tip revision: c517d83
nf_nat_l4proto.h
/* Header for use in defining a given protocol. */
#ifndef _NF_NAT_L4PROTO_H
#define _NF_NAT_L4PROTO_H
#include <net/netfilter/nf_nat.h>
#include <linux/netfilter/nfnetlink_conntrack.h>
struct nf_nat_range;
struct nf_nat_l3proto;
struct nf_nat_l4proto {
/* Protocol number. */
u8 l4proto;
/* Translate a packet to the target according to manip type.
* Return true if succeeded.
*/
bool (*manip_pkt)(struct sk_buff *skb,
const struct nf_nat_l3proto *l3proto,
unsigned int iphdroff, unsigned int hdroff,
const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype);
/* Is the manipable part of the tuple between min and max incl? */
bool (*in_range)(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype,
const union nf_conntrack_man_proto *min,
const union nf_conntrack_man_proto *max);
/* Alter the per-proto part of the tuple (depending on
* maniptype), to give a unique tuple in the given range if
* possible. Per-protocol part of tuple is initialized to the
* incoming packet.
*/
void (*unique_tuple)(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct);
int (*nlattr_to_range)(struct nlattr *tb[],
struct nf_nat_range *range);
};
/* Protocol registration. */
int nf_nat_l4proto_register(u8 l3proto, const struct nf_nat_l4proto *l4proto);
void nf_nat_l4proto_unregister(u8 l3proto,
const struct nf_nat_l4proto *l4proto);
const struct nf_nat_l4proto *__nf_nat_l4proto_find(u8 l3proto, u8 l4proto);
/* Built-in protocols. */
extern const struct nf_nat_l4proto nf_nat_l4proto_tcp;
extern const struct nf_nat_l4proto nf_nat_l4proto_udp;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmp;
extern const struct nf_nat_l4proto nf_nat_l4proto_icmpv6;
extern const struct nf_nat_l4proto nf_nat_l4proto_unknown;
bool nf_nat_l4proto_in_range(const struct nf_conntrack_tuple *tuple,
enum nf_nat_manip_type maniptype,
const union nf_conntrack_man_proto *min,
const union nf_conntrack_man_proto *max);
void nf_nat_l4proto_unique_tuple(const struct nf_nat_l3proto *l3proto,
struct nf_conntrack_tuple *tuple,
const struct nf_nat_range *range,
enum nf_nat_manip_type maniptype,
const struct nf_conn *ct, u16 *rover);
int nf_nat_l4proto_nlattr_to_range(struct nlattr *tb[],
struct nf_nat_range *range);
#endif /*_NF_NAT_L4PROTO_H*/