mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
9a08ecfe74
nowadays the NAT extension only stores the interface index (used to purge connections that got masqueraded when interface goes down) and pptp nat information. Previous patches moved nf_ct_nat_ext_add to those places that need it. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
#ifndef _NF_NAT_H
|
|
#define _NF_NAT_H
|
|
#include <linux/rhashtable.h>
|
|
#include <linux/netfilter_ipv4.h>
|
|
#include <linux/netfilter/nf_nat.h>
|
|
#include <net/netfilter/nf_conntrack_tuple.h>
|
|
|
|
enum nf_nat_manip_type {
|
|
NF_NAT_MANIP_SRC,
|
|
NF_NAT_MANIP_DST
|
|
};
|
|
|
|
/* SRC manip occurs POST_ROUTING or LOCAL_IN */
|
|
#define HOOK2MANIP(hooknum) ((hooknum) != NF_INET_POST_ROUTING && \
|
|
(hooknum) != NF_INET_LOCAL_IN)
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/netfilter/nf_conntrack_pptp.h>
|
|
#include <net/netfilter/nf_conntrack_extend.h>
|
|
|
|
/* per conntrack: nat application helper private data */
|
|
union nf_conntrack_nat_help {
|
|
/* insert nat helper private data here */
|
|
#if defined(CONFIG_NF_NAT_PPTP) || defined(CONFIG_NF_NAT_PPTP_MODULE)
|
|
struct nf_nat_pptp nat_pptp_info;
|
|
#endif
|
|
};
|
|
|
|
struct nf_conn;
|
|
|
|
/* The structure embedded in the conntrack structure. */
|
|
struct nf_conn_nat {
|
|
union nf_conntrack_nat_help help;
|
|
#if IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV4) || \
|
|
IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV6)
|
|
int masq_index;
|
|
#endif
|
|
};
|
|
|
|
/* Set up the info structure to map into this range. */
|
|
unsigned int nf_nat_setup_info(struct nf_conn *ct,
|
|
const struct nf_nat_range *range,
|
|
enum nf_nat_manip_type maniptype);
|
|
|
|
extern unsigned int nf_nat_alloc_null_binding(struct nf_conn *ct,
|
|
unsigned int hooknum);
|
|
|
|
struct nf_conn_nat *nf_ct_nat_ext_add(struct nf_conn *ct);
|
|
|
|
/* Is this tuple already taken? (not by us)*/
|
|
int nf_nat_used_tuple(const struct nf_conntrack_tuple *tuple,
|
|
const struct nf_conn *ignored_conntrack);
|
|
|
|
static inline struct nf_conn_nat *nfct_nat(const struct nf_conn *ct)
|
|
{
|
|
#if defined(CONFIG_NF_NAT) || defined(CONFIG_NF_NAT_MODULE)
|
|
return nf_ct_ext_find(ct, NF_CT_EXT_NAT);
|
|
#else
|
|
return NULL;
|
|
#endif
|
|
}
|
|
|
|
static inline bool nf_nat_oif_changed(unsigned int hooknum,
|
|
enum ip_conntrack_info ctinfo,
|
|
struct nf_conn_nat *nat,
|
|
const struct net_device *out)
|
|
{
|
|
#if IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV4) || \
|
|
IS_ENABLED(CONFIG_NF_NAT_MASQUERADE_IPV6)
|
|
return nat && nat->masq_index && hooknum == NF_INET_POST_ROUTING &&
|
|
CTINFO2DIR(ctinfo) == IP_CT_DIR_ORIGINAL &&
|
|
nat->masq_index != out->ifindex;
|
|
#else
|
|
return false;
|
|
#endif
|
|
}
|
|
|
|
#endif
|