0a93aaedc4
We already include netns address in the hash and compare the netns pointers during lookup, so even if namespaces have overlapping addresses entries will be spread across the expectation table. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
123 lines
3.4 KiB
C
123 lines
3.4 KiB
C
/*
|
|
* connection tracking expectations.
|
|
*/
|
|
|
|
#ifndef _NF_CONNTRACK_EXPECT_H
|
|
#define _NF_CONNTRACK_EXPECT_H
|
|
|
|
#include <net/netfilter/nf_conntrack.h>
|
|
#include <net/netfilter/nf_conntrack_zones.h>
|
|
|
|
extern unsigned int nf_ct_expect_hsize;
|
|
extern unsigned int nf_ct_expect_max;
|
|
extern struct hlist_head *nf_ct_expect_hash;
|
|
|
|
struct nf_conntrack_expect {
|
|
/* Conntrack expectation list member */
|
|
struct hlist_node lnode;
|
|
|
|
/* Hash member */
|
|
struct hlist_node hnode;
|
|
|
|
/* We expect this tuple, with the following mask */
|
|
struct nf_conntrack_tuple tuple;
|
|
struct nf_conntrack_tuple_mask mask;
|
|
|
|
/* Function to call after setup and insertion */
|
|
void (*expectfn)(struct nf_conn *new,
|
|
struct nf_conntrack_expect *this);
|
|
|
|
/* Helper to assign to new connection */
|
|
struct nf_conntrack_helper *helper;
|
|
|
|
/* The conntrack of the master connection */
|
|
struct nf_conn *master;
|
|
|
|
/* Timer function; deletes the expectation. */
|
|
struct timer_list timeout;
|
|
|
|
/* Usage count. */
|
|
atomic_t use;
|
|
|
|
/* Flags */
|
|
unsigned int flags;
|
|
|
|
/* Expectation class */
|
|
unsigned int class;
|
|
|
|
#ifdef CONFIG_NF_NAT_NEEDED
|
|
union nf_inet_addr saved_addr;
|
|
/* This is the original per-proto part, used to map the
|
|
* expected connection the way the recipient expects. */
|
|
union nf_conntrack_man_proto saved_proto;
|
|
/* Direction relative to the master connection. */
|
|
enum ip_conntrack_dir dir;
|
|
#endif
|
|
|
|
struct rcu_head rcu;
|
|
};
|
|
|
|
static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
|
|
{
|
|
return nf_ct_net(exp->master);
|
|
}
|
|
|
|
#define NF_CT_EXP_POLICY_NAME_LEN 16
|
|
|
|
struct nf_conntrack_expect_policy {
|
|
unsigned int max_expected;
|
|
unsigned int timeout;
|
|
char name[NF_CT_EXP_POLICY_NAME_LEN];
|
|
};
|
|
|
|
#define NF_CT_EXPECT_CLASS_DEFAULT 0
|
|
|
|
int nf_conntrack_expect_pernet_init(struct net *net);
|
|
void nf_conntrack_expect_pernet_fini(struct net *net);
|
|
|
|
int nf_conntrack_expect_init(void);
|
|
void nf_conntrack_expect_fini(void);
|
|
|
|
struct nf_conntrack_expect *
|
|
__nf_ct_expect_find(struct net *net,
|
|
const struct nf_conntrack_zone *zone,
|
|
const struct nf_conntrack_tuple *tuple);
|
|
|
|
struct nf_conntrack_expect *
|
|
nf_ct_expect_find_get(struct net *net,
|
|
const struct nf_conntrack_zone *zone,
|
|
const struct nf_conntrack_tuple *tuple);
|
|
|
|
struct nf_conntrack_expect *
|
|
nf_ct_find_expectation(struct net *net,
|
|
const struct nf_conntrack_zone *zone,
|
|
const struct nf_conntrack_tuple *tuple);
|
|
|
|
void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
|
|
u32 portid, int report);
|
|
static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
|
|
{
|
|
nf_ct_unlink_expect_report(exp, 0, 0);
|
|
}
|
|
|
|
void nf_ct_remove_expectations(struct nf_conn *ct);
|
|
void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
|
|
|
|
/* Allocate space for an expectation: this is mandatory before calling
|
|
nf_ct_expect_related. You will have to call put afterwards. */
|
|
struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
|
|
void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
|
|
const union nf_inet_addr *,
|
|
const union nf_inet_addr *,
|
|
u_int8_t, const __be16 *, const __be16 *);
|
|
void nf_ct_expect_put(struct nf_conntrack_expect *exp);
|
|
int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
|
|
u32 portid, int report);
|
|
static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
|
|
{
|
|
return nf_ct_expect_related_report(expect, 0, 0);
|
|
}
|
|
|
|
#endif /*_NF_CONNTRACK_EXPECT_H*/
|
|
|