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c539f017 FW |
1 | #include <linux/types.h> |
2 | #include <net/net_namespace.h> | |
3 | #include <linux/netfilter/nf_conntrack_common.h> | |
4 | #include <linux/netfilter/nf_conntrack_tuple_common.h> | |
5 | #include <net/netfilter/nf_conntrack.h> | |
6 | #include <net/netfilter/nf_conntrack_extend.h> | |
7 | ||
8 | #include <uapi/linux/netfilter/xt_connlabel.h> | |
9 | ||
10 | struct nf_conn_labels { | |
11 | u8 words; | |
12 | unsigned long bits[]; | |
13 | }; | |
14 | ||
15 | static inline struct nf_conn_labels *nf_ct_labels_find(const struct nf_conn *ct) | |
16 | { | |
17 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
18 | return nf_ct_ext_find(ct, NF_CT_EXT_LABELS); | |
19 | #else | |
20 | return NULL; | |
21 | #endif | |
22 | } | |
23 | ||
24 | static inline struct nf_conn_labels *nf_ct_labels_ext_add(struct nf_conn *ct) | |
25 | { | |
26 | #ifdef CONFIG_NF_CONNTRACK_LABELS | |
27 | struct nf_conn_labels *cl_ext; | |
28 | struct net *net = nf_ct_net(ct); | |
29 | u8 words; | |
30 | ||
31 | words = ACCESS_ONCE(net->ct.label_words); | |
32 | if (words == 0 || WARN_ON_ONCE(words > 8)) | |
33 | return NULL; | |
34 | ||
35 | cl_ext = nf_ct_ext_add_length(ct, NF_CT_EXT_LABELS, | |
36 | words * sizeof(long), GFP_ATOMIC); | |
37 | if (cl_ext != NULL) | |
38 | cl_ext->words = words; | |
39 | ||
40 | return cl_ext; | |
41 | #else | |
42 | return NULL; | |
43 | #endif | |
44 | } | |
45 | ||
46 | bool nf_connlabel_match(const struct nf_conn *ct, u16 bit); | |
47 | int nf_connlabel_set(struct nf_conn *ct, u16 bit); | |
48 | ||
9b21f6a9 FW |
49 | int nf_connlabels_replace(struct nf_conn *ct, |
50 | const u32 *data, const u32 *mask, unsigned int words); | |
51 | ||
c539f017 | 52 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
5f69b8f5 G |
53 | int nf_conntrack_labels_init(void); |
54 | void nf_conntrack_labels_fini(void); | |
c539f017 | 55 | #else |
5f69b8f5 G |
56 | static inline int nf_conntrack_labels_init(void) { return 0; } |
57 | static inline void nf_conntrack_labels_fini(void) {} | |
c539f017 | 58 | #endif |