Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 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 | |
Florian Westphal | 9b21f6a | 2013-01-11 06:30:46 +0000 | [diff] [blame] | 49 | int nf_connlabels_replace(struct nf_conn *ct, |
| 50 | const u32 *data, const u32 *mask, unsigned int words); |
| 51 | |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 52 | #ifdef CONFIG_NF_CONNTRACK_LABELS |
Gao feng | 5f69b8f | 2013-01-21 22:10:31 +0000 | [diff] [blame] | 53 | int nf_conntrack_labels_init(void); |
| 54 | void nf_conntrack_labels_fini(void); |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 55 | #else |
Gao feng | 5f69b8f | 2013-01-21 22:10:31 +0000 | [diff] [blame] | 56 | static inline int nf_conntrack_labels_init(void) { return 0; } |
| 57 | static inline void nf_conntrack_labels_fini(void) {} |
Florian Westphal | c539f01 | 2013-01-11 06:30:44 +0000 | [diff] [blame] | 58 | #endif |