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 <net/net_namespace.h>
10 #include <net/netfilter/nf_conntrack_expect.h>
11 #include <linux/netfilter/nf_conntrack_common.h>
12 #include <linux/netfilter/nf_conntrack_tuple_common.h>
13 #include <net/netfilter/nf_conntrack_extend.h>
15 /* Connection tracking event types */
16 enum ip_conntrack_events
18 IPCT_NEW = 0, /* new conntrack */
19 IPCT_RELATED = 1, /* related conntrack */
20 IPCT_DESTROY = 2, /* destroyed conntrack */
21 IPCT_STATUS = 3, /* status has changed */
22 IPCT_PROTOINFO = 4, /* protocol information has changed */
23 IPCT_HELPER = 5, /* new helper has been set */
24 IPCT_MARK = 6, /* new mark has been set */
25 IPCT_NATSEQADJ = 7, /* NAT is doing sequence adjustment */
26 IPCT_SECMARK = 8, /* new security mark has been set */
29 enum ip_conntrack_expect_events {
30 IPEXP_NEW = 0, /* new expectation */
33 struct nf_conntrack_ecache {
34 unsigned long cache; /* bitops want long */
37 static inline struct nf_conntrack_ecache *
38 nf_ct_ecache_find(const struct nf_conn *ct)
40 return nf_ct_ext_find(ct, NF_CT_EXT_ECACHE);
43 static inline struct nf_conntrack_ecache *
44 nf_ct_ecache_ext_add(struct nf_conn *ct, gfp_t gfp)
46 struct net *net = nf_ct_net(ct);
48 if (!net->ct.sysctl_events)
51 return nf_ct_ext_add(ct, NF_CT_EXT_ECACHE, gfp);
54 #ifdef CONFIG_NF_CONNTRACK_EVENTS
55 /* This structure is passed to event handler */
62 struct nf_ct_event_notifier {
63 int (*fcn)(unsigned int events, struct nf_ct_event *item);
66 extern struct nf_ct_event_notifier *nf_conntrack_event_cb;
67 extern int nf_conntrack_register_notifier(struct nf_ct_event_notifier *nb);
68 extern void nf_conntrack_unregister_notifier(struct nf_ct_event_notifier *nb);
70 extern void nf_ct_deliver_cached_events(struct nf_conn *ct);
73 nf_conntrack_event_cache(enum ip_conntrack_events event, struct nf_conn *ct)
75 struct nf_conntrack_ecache *e;
77 if (nf_conntrack_event_cb == NULL)
80 e = nf_ct_ecache_find(ct);
84 set_bit(event, &e->cache);
88 nf_conntrack_eventmask_report(unsigned int eventmask,
93 struct net *net = nf_ct_net(ct);
94 struct nf_ct_event_notifier *notify;
97 notify = rcu_dereference(nf_conntrack_event_cb);
101 if (!net->ct.sysctl_events)
104 if (nf_ct_is_confirmed(ct) && !nf_ct_is_dying(ct)) {
105 struct nf_ct_event item = {
110 notify->fcn(eventmask, &item);
117 nf_conntrack_event_report(enum ip_conntrack_events event, struct nf_conn *ct,
120 nf_conntrack_eventmask_report(1 << event, ct, pid, report);
124 nf_conntrack_event(enum ip_conntrack_events event, struct nf_conn *ct)
126 nf_conntrack_eventmask_report(1 << event, ct, 0, 0);
129 struct nf_exp_event {
130 struct nf_conntrack_expect *exp;
135 struct nf_exp_event_notifier {
136 int (*fcn)(unsigned int events, struct nf_exp_event *item);
139 extern struct nf_exp_event_notifier *nf_expect_event_cb;
140 extern int nf_ct_expect_register_notifier(struct nf_exp_event_notifier *nb);
141 extern void nf_ct_expect_unregister_notifier(struct nf_exp_event_notifier *nb);
144 nf_ct_expect_event_report(enum ip_conntrack_expect_events event,
145 struct nf_conntrack_expect *exp,
149 struct net *net = nf_ct_exp_net(exp);
150 struct nf_exp_event_notifier *notify;
153 notify = rcu_dereference(nf_expect_event_cb);
157 if (!net->ct.sysctl_events)
161 struct nf_exp_event item = {
166 notify->fcn(1 << event, &item);
173 nf_ct_expect_event(enum ip_conntrack_expect_events event,
174 struct nf_conntrack_expect *exp)
176 nf_ct_expect_event_report(event, exp, 0, 0);
179 extern int nf_conntrack_ecache_init(struct net *net);
180 extern void nf_conntrack_ecache_fini(struct net *net);
182 #else /* CONFIG_NF_CONNTRACK_EVENTS */
184 static inline void nf_conntrack_event_cache(enum ip_conntrack_events event,
185 struct nf_conn *ct) {}
186 static inline void nf_conntrack_eventmask_report(unsigned int eventmask,
190 static inline void nf_conntrack_event(enum ip_conntrack_events event,
191 struct nf_conn *ct) {}
192 static inline void nf_conntrack_event_report(enum ip_conntrack_events event,
196 static inline void nf_ct_deliver_cached_events(const struct nf_conn *ct) {}
197 static inline void nf_ct_expect_event(enum ip_conntrack_expect_events event,
198 struct nf_conntrack_expect *exp) {}
199 static inline void nf_ct_expect_event_report(enum ip_conntrack_expect_events e,
200 struct nf_conntrack_expect *exp,
204 static inline int nf_conntrack_ecache_init(struct net *net)
209 static inline void nf_conntrack_ecache_fini(struct net *net)
212 #endif /* CONFIG_NF_CONNTRACK_EVENTS */
214 #endif /*_NF_CONNTRACK_ECACHE_H*/