2 * connection tracking event cache.
5 #ifndef _NF_CONNTRACK_ECACHE_H
6 #define _NF_CONNTRACK_ECACHE_H
7 #include <net/netfilter/nf_conntrack.h>
9 #include <linux/notifier.h>
10 #include <linux/interrupt.h>
11 #include <net/net_namespace.h>
12 #include <net/netfilter/nf_conntrack_expect.h>
14 /* Connection tracking event bits */
15 enum ip_conntrack_events
19 IPCT_NEW = (1 << IPCT_NEW_BIT),
21 /* Expected connection */
23 IPCT_RELATED = (1 << IPCT_RELATED_BIT),
25 /* Destroyed conntrack */
27 IPCT_DESTROY = (1 << IPCT_DESTROY_BIT),
29 /* Status has changed */
31 IPCT_STATUS = (1 << IPCT_STATUS_BIT),
33 /* Update of protocol info */
34 IPCT_PROTOINFO_BIT = 4,
35 IPCT_PROTOINFO = (1 << IPCT_PROTOINFO_BIT),
37 /* New helper for conntrack */
39 IPCT_HELPER = (1 << IPCT_HELPER_BIT),
43 IPCT_MARK = (1 << IPCT_MARK_BIT),
45 /* NAT sequence adjustment */
46 IPCT_NATSEQADJ_BIT = 7,
47 IPCT_NATSEQADJ = (1 << IPCT_NATSEQADJ_BIT),
51 IPCT_SECMARK = (1 << IPCT_SECMARK_BIT),
54 enum ip_conntrack_expect_events {
56 IPEXP_NEW = (1 << IPEXP_NEW_BIT),
59 #ifdef CONFIG_NF_CONNTRACK_EVENTS
60 struct nf_conntrack_ecache {
65 /* This structure is passed to event handler */
72 extern struct atomic_notifier_head nf_conntrack_chain;
73 extern int nf_conntrack_register_notifier(struct notifier_block *nb);
74 extern int nf_conntrack_unregister_notifier(struct notifier_block *nb);
76 extern void nf_ct_deliver_cached_events(const struct nf_conn *ct);
77 extern void __nf_ct_event_cache_init(struct nf_conn *ct);
78 extern void nf_ct_event_cache_flush(struct net *net);
81 nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
83 struct net *net = nf_ct_net(ct);
84 struct nf_conntrack_ecache *ecache;
87 ecache = per_cpu_ptr(net->ct.ecache, raw_smp_processor_id());
89 __nf_ct_event_cache_init(ct);
90 ecache->events |= event;
95 nf_conntrack_event_report(enum ip_conntrack_events event,
100 struct nf_ct_event item = {
105 if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct))
106 atomic_notifier_call_chain(&nf_conntrack_chain, event, &item);
110 nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
112 nf_conntrack_event_report(event, ct, 0, 0);
115 struct nf_exp_event {
116 struct nf_conntrack_expect *exp;
121 extern struct atomic_notifier_head nf_ct_expect_chain;
122 extern int nf_ct_expect_register_notifier(struct notifier_block *nb);
123 extern int nf_ct_expect_unregister_notifier(struct notifier_block *nb);
126 nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
127 struct nf_conntrack_expect *exp,
131 struct nf_exp_event item = {
136 atomic_notifier_call_chain(&nf_ct_expect_chain, event, &item);
140 nf_ct_expect_event(enum ip_conntrack_expect_events event,
141 struct nf_conntrack_expect *exp)
143 nf_ct_expect_event_report(event, exp, 0, 0);
146 extern int nf_conntrack_ecache_init(struct net *net);
147 extern void nf_conntrack_ecache_fini(struct net *net);
149 #else /* CONFIG_NF_CONNTRACK_EVENTS */
151 static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
152 struct nf_conn *ct) {}
153 static inline void nf_conntrack_event(enum ip_conntrack_events event,
154 struct nf_conn *ct) {}
155 static inline void nf_conntrack_event_report(enum ip_conntrack_events event,
159 static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
160 static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event,
161 struct nf_conntrack_expect *exp) {}
162 static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
163 struct nf_conntrack_expect *exp,
166 static inline void nf_ct_event_cache_flush(struct net *net) {}
168 static inline int nf_conntrack_ecache_init(struct net *net)
173 static inline void nf_conntrack_ecache_fini(struct net *net)
176 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
178 #endif /*_NF_CONNTRACK_ECACHE_H*/