blob: 11e815084fcf05cb1a680b3c61968a1eb66a1ac5 [file] [log] [blame]
* connection tracking expectations.
#include <net/netfilter/nf_conntrack.h>
extern unsigned int nf_ct_expect_hsize;
extern unsigned int nf_ct_expect_max;
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;
__be32 saved_ip;
/* 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;
struct rcu_head rcu;
static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
return nf_ct_net(exp->master);
struct nf_conntrack_expect_policy {
unsigned int max_expected;
unsigned int timeout;
const char *name;
int nf_conntrack_expect_init(struct net *net);
void nf_conntrack_expect_fini(struct net *net);
struct nf_conntrack_expect *
__nf_ct_expect_find(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
nf_ct_expect_find_get(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
struct nf_conntrack_expect *
nf_ct_find_expectation(struct net *net, u16 zone,
const struct nf_conntrack_tuple *tuple);
void nf_ct_unlink_expect(struct nf_conntrack_expect *exp);
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 pid, int report);
static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
return nf_ct_expect_related_report(expect, 0, 0);