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![Gao Feng](/assets/img/avatar_default.png)
When remove one expect, it needs three statements. And there are multiple duplicated codes in current code. So add one common function nf_ct_remove_expect to consolidate this. Signed-off-by: Gao Feng <fgao@ikuai8.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/*
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* connection tracking expectations.
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*/
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#ifndef _NF_CONNTRACK_EXPECT_H
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#define _NF_CONNTRACK_EXPECT_H
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#include <linux/refcount.h>
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#include <net/netfilter/nf_conntrack.h>
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#include <net/netfilter/nf_conntrack_zones.h>
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extern unsigned int nf_ct_expect_hsize;
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extern unsigned int nf_ct_expect_max;
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extern struct hlist_head *nf_ct_expect_hash;
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struct nf_conntrack_expect {
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/* Conntrack expectation list member */
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struct hlist_node lnode;
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/* Hash member */
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struct hlist_node hnode;
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/* We expect this tuple, with the following mask */
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struct nf_conntrack_tuple tuple;
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struct nf_conntrack_tuple_mask mask;
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/* Function to call after setup and insertion */
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void (*expectfn)(struct nf_conn *new,
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struct nf_conntrack_expect *this);
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/* Helper to assign to new connection */
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struct nf_conntrack_helper *helper;
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/* The conntrack of the master connection */
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struct nf_conn *master;
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/* Timer function; deletes the expectation. */
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struct timer_list timeout;
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/* Usage count. */
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refcount_t use;
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/* Flags */
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unsigned int flags;
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/* Expectation class */
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unsigned int class;
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#ifdef CONFIG_NF_NAT_NEEDED
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union nf_inet_addr saved_addr;
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/* This is the original per-proto part, used to map the
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* expected connection the way the recipient expects. */
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union nf_conntrack_man_proto saved_proto;
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/* Direction relative to the master connection. */
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enum ip_conntrack_dir dir;
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#endif
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struct rcu_head rcu;
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};
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static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
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{
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return nf_ct_net(exp->master);
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}
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#define NF_CT_EXP_POLICY_NAME_LEN 16
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struct nf_conntrack_expect_policy {
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unsigned int max_expected;
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unsigned int timeout;
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char name[NF_CT_EXP_POLICY_NAME_LEN];
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};
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#define NF_CT_EXPECT_CLASS_DEFAULT 0
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#define NF_CT_EXPECT_MAX_CNT 255
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int nf_conntrack_expect_pernet_init(struct net *net);
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void nf_conntrack_expect_pernet_fini(struct net *net);
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int nf_conntrack_expect_init(void);
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void nf_conntrack_expect_fini(void);
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struct nf_conntrack_expect *
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__nf_ct_expect_find(struct net *net,
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const struct nf_conntrack_zone *zone,
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const struct nf_conntrack_tuple *tuple);
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struct nf_conntrack_expect *
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nf_ct_expect_find_get(struct net *net,
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const struct nf_conntrack_zone *zone,
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const struct nf_conntrack_tuple *tuple);
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struct nf_conntrack_expect *
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nf_ct_find_expectation(struct net *net,
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const struct nf_conntrack_zone *zone,
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const struct nf_conntrack_tuple *tuple);
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void nf_ct_unlink_expect_report(struct nf_conntrack_expect *exp,
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u32 portid, int report);
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static inline void nf_ct_unlink_expect(struct nf_conntrack_expect *exp)
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{
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nf_ct_unlink_expect_report(exp, 0, 0);
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}
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void nf_ct_remove_expectations(struct nf_conn *ct);
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void nf_ct_unexpect_related(struct nf_conntrack_expect *exp);
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bool nf_ct_remove_expect(struct nf_conntrack_expect *exp);
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/* Allocate space for an expectation: this is mandatory before calling
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nf_ct_expect_related. You will have to call put afterwards. */
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struct nf_conntrack_expect *nf_ct_expect_alloc(struct nf_conn *me);
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void nf_ct_expect_init(struct nf_conntrack_expect *, unsigned int, u_int8_t,
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const union nf_inet_addr *,
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const union nf_inet_addr *,
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u_int8_t, const __be16 *, const __be16 *);
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void nf_ct_expect_put(struct nf_conntrack_expect *exp);
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int nf_ct_expect_related_report(struct nf_conntrack_expect *expect,
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u32 portid, int report);
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static inline int nf_ct_expect_related(struct nf_conntrack_expect *expect)
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{
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return nf_ct_expect_related_report(expect, 0, 0);
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}
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#endif /*_NF_CONNTRACK_EXPECT_H*/
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