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9fb9cbb1 YK |
1 | /* |
2 | * This header is used to share core functionality between the | |
3 | * standalone connection tracking module, and the compatibility layer's use | |
4 | * of connection tracking. | |
5 | * | |
6 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
7 | * - generalize L3 protocol dependent part. | |
8 | * | |
9 | * Derived from include/linux/netfiter_ipv4/ip_conntrack_core.h | |
10 | */ | |
11 | ||
12 | #ifndef _NF_CONNTRACK_CORE_H | |
13 | #define _NF_CONNTRACK_CORE_H | |
14 | ||
15 | #include <linux/netfilter.h> | |
77ab9cff MJ |
16 | #include <net/netfilter/nf_conntrack_l3proto.h> |
17 | #include <net/netfilter/nf_conntrack_protocol.h> | |
f6180121 | 18 | #include <net/netfilter/nf_conntrack_ecache.h> |
9fb9cbb1 YK |
19 | |
20 | /* This header is used to share core functionality between the | |
21 | standalone connection tracking module, and the compatibility layer's use | |
22 | of connection tracking. */ | |
23 | extern unsigned int nf_conntrack_in(int pf, | |
24 | unsigned int hooknum, | |
25 | struct sk_buff **pskb); | |
26 | ||
27 | extern int nf_conntrack_init(void); | |
28 | extern void nf_conntrack_cleanup(void); | |
29 | ||
30 | struct nf_conntrack_l3proto; | |
31 | extern struct nf_conntrack_l3proto *nf_ct_find_l3proto(u_int16_t pf); | |
32 | /* Like above, but you already have conntrack read lock. */ | |
33 | extern struct nf_conntrack_l3proto *__nf_ct_find_l3proto(u_int16_t l3proto); | |
34 | ||
35 | struct nf_conntrack_protocol; | |
36 | ||
37 | extern int | |
38 | nf_ct_get_tuple(const struct sk_buff *skb, | |
39 | unsigned int nhoff, | |
40 | unsigned int dataoff, | |
41 | u_int16_t l3num, | |
42 | u_int8_t protonum, | |
43 | struct nf_conntrack_tuple *tuple, | |
44 | const struct nf_conntrack_l3proto *l3proto, | |
45 | const struct nf_conntrack_protocol *protocol); | |
46 | ||
47 | extern int | |
48 | nf_ct_invert_tuple(struct nf_conntrack_tuple *inverse, | |
49 | const struct nf_conntrack_tuple *orig, | |
50 | const struct nf_conntrack_l3proto *l3proto, | |
51 | const struct nf_conntrack_protocol *protocol); | |
52 | ||
53 | /* Find a connection corresponding to a tuple. */ | |
54 | extern struct nf_conntrack_tuple_hash * | |
55 | nf_conntrack_find_get(const struct nf_conntrack_tuple *tuple, | |
56 | const struct nf_conn *ignored_conntrack); | |
57 | ||
58 | extern int __nf_conntrack_confirm(struct sk_buff **pskb); | |
59 | ||
60 | /* Confirm a connection: returns NF_DROP if packet must be dropped. */ | |
61 | static inline int nf_conntrack_confirm(struct sk_buff **pskb) | |
62 | { | |
63 | struct nf_conn *ct = (struct nf_conn *)(*pskb)->nfct; | |
64 | int ret = NF_ACCEPT; | |
65 | ||
66 | if (ct) { | |
67 | if (!nf_ct_is_confirmed(ct)) | |
68 | ret = __nf_conntrack_confirm(pskb); | |
69 | nf_ct_deliver_cached_events(ct); | |
70 | } | |
71 | return ret; | |
72 | } | |
73 | ||
74 | extern void __nf_conntrack_attach(struct sk_buff *nskb, struct sk_buff *skb); | |
75 | ||
77ab9cff MJ |
76 | int |
77 | print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, | |
78 | struct nf_conntrack_l3proto *l3proto, | |
79 | struct nf_conntrack_protocol *proto); | |
80 | ||
9fb9cbb1 YK |
81 | extern struct list_head *nf_conntrack_hash; |
82 | extern struct list_head nf_conntrack_expect_list; | |
83 | extern rwlock_t nf_conntrack_lock ; | |
7e5d03bb MJ |
84 | extern struct list_head unconfirmed; |
85 | ||
9fb9cbb1 | 86 | #endif /* _NF_CONNTRACK_CORE_H */ |