Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 1 | #ifndef _NF_CONNTRACK_TIMEOUT_H |
| 2 | #define _NF_CONNTRACK_TIMEOUT_H |
| 3 | |
| 4 | #include <net/net_namespace.h> |
| 5 | #include <linux/netfilter/nf_conntrack_common.h> |
| 6 | #include <linux/netfilter/nf_conntrack_tuple_common.h> |
| 7 | #include <net/netfilter/nf_conntrack.h> |
| 8 | #include <net/netfilter/nf_conntrack_extend.h> |
| 9 | |
| 10 | #define CTNL_TIMEOUT_NAME_MAX 32 |
| 11 | |
| 12 | struct ctnl_timeout { |
| 13 | struct list_head head; |
| 14 | struct rcu_head rcu_head; |
| 15 | atomic_t refcnt; |
| 16 | char name[CTNL_TIMEOUT_NAME_MAX]; |
| 17 | __u16 l3num; |
Pablo Neira Ayuso | c1ebd7d | 2012-03-22 23:40:01 +0100 | [diff] [blame] | 18 | struct nf_conntrack_l4proto *l4proto; |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 19 | char data[0]; |
| 20 | }; |
| 21 | |
| 22 | struct nf_conn_timeout { |
Pablo Neira Ayuso | ae2d708 | 2015-10-05 16:51:01 +0200 | [diff] [blame] | 23 | struct ctnl_timeout __rcu *timeout; |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 24 | }; |
| 25 | |
Pablo Neira Ayuso | ae2d708 | 2015-10-05 16:51:01 +0200 | [diff] [blame] | 26 | static inline unsigned int * |
| 27 | nf_ct_timeout_data(struct nf_conn_timeout *t) |
| 28 | { |
| 29 | struct ctnl_timeout *timeout; |
| 30 | |
| 31 | timeout = rcu_dereference(t->timeout); |
| 32 | if (timeout == NULL) |
| 33 | return NULL; |
| 34 | |
| 35 | return (unsigned int *)timeout->data; |
| 36 | } |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 37 | |
| 38 | static inline |
| 39 | struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct) |
| 40 | { |
| 41 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 42 | return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT); |
| 43 | #else |
| 44 | return NULL; |
| 45 | #endif |
| 46 | } |
| 47 | |
| 48 | static inline |
| 49 | struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct, |
| 50 | struct ctnl_timeout *timeout, |
| 51 | gfp_t gfp) |
| 52 | { |
| 53 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 54 | struct nf_conn_timeout *timeout_ext; |
| 55 | |
| 56 | timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp); |
| 57 | if (timeout_ext == NULL) |
| 58 | return NULL; |
| 59 | |
Pablo Neira Ayuso | ae2d708 | 2015-10-05 16:51:01 +0200 | [diff] [blame] | 60 | rcu_assign_pointer(timeout_ext->timeout, timeout); |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 61 | |
| 62 | return timeout_ext; |
| 63 | #else |
| 64 | return NULL; |
| 65 | #endif |
| 66 | }; |
| 67 | |
Pablo Neira Ayuso | 84b5ee9 | 2012-08-28 00:53:15 +0000 | [diff] [blame] | 68 | static inline unsigned int * |
| 69 | nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct, |
| 70 | struct nf_conntrack_l4proto *l4proto) |
| 71 | { |
| 72 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
| 73 | struct nf_conn_timeout *timeout_ext; |
| 74 | unsigned int *timeouts; |
| 75 | |
| 76 | timeout_ext = nf_ct_timeout_find(ct); |
Pablo Neira Ayuso | ae2d708 | 2015-10-05 16:51:01 +0200 | [diff] [blame] | 77 | if (timeout_ext) { |
| 78 | timeouts = nf_ct_timeout_data(timeout_ext); |
| 79 | if (unlikely(!timeouts)) |
| 80 | timeouts = l4proto->get_timeouts(net); |
| 81 | } else { |
Pablo Neira Ayuso | 84b5ee9 | 2012-08-28 00:53:15 +0000 | [diff] [blame] | 82 | timeouts = l4proto->get_timeouts(net); |
Pablo Neira Ayuso | ae2d708 | 2015-10-05 16:51:01 +0200 | [diff] [blame] | 83 | } |
Pablo Neira Ayuso | 84b5ee9 | 2012-08-28 00:53:15 +0000 | [diff] [blame] | 84 | |
| 85 | return timeouts; |
| 86 | #else |
| 87 | return l4proto->get_timeouts(net); |
| 88 | #endif |
| 89 | } |
| 90 | |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 91 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
Joe Perches | 4e77be4 | 2013-09-23 11:37:48 -0700 | [diff] [blame] | 92 | int nf_conntrack_timeout_init(void); |
| 93 | void nf_conntrack_timeout_fini(void); |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 94 | #else |
Gao feng | 8684094 | 2013-01-21 22:10:29 +0000 | [diff] [blame] | 95 | static inline int nf_conntrack_timeout_init(void) |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 96 | { |
| 97 | return 0; |
| 98 | } |
| 99 | |
Gao feng | 8684094 | 2013-01-21 22:10:29 +0000 | [diff] [blame] | 100 | static inline void nf_conntrack_timeout_fini(void) |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 101 | { |
| 102 | return; |
| 103 | } |
| 104 | #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ |
| 105 | |
| 106 | #ifdef CONFIG_NF_CONNTRACK_TIMEOUT |
Pablo Neira | 19576c9 | 2015-12-09 14:07:40 +0100 | [diff] [blame] | 107 | extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(struct net *net, const char *name); |
Pablo Neira Ayuso | dd70507 | 2012-02-28 23:36:48 +0100 | [diff] [blame] | 108 | extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout); |
| 109 | #endif |
| 110 | |
| 111 | #endif /* _NF_CONNTRACK_TIMEOUT_H */ |