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; 18 struct nf_conntrack_l4proto *l4proto; 19 char data[0]; 20 }; 21 22 struct nf_conn_timeout { 23 struct ctnl_timeout *timeout; 24 }; 25 26 #define NF_CT_TIMEOUT_EXT_DATA(__t) (unsigned int *) &((__t)->timeout->data) 27 28 static inline 29 struct nf_conn_timeout *nf_ct_timeout_find(const struct nf_conn *ct) 30 { 31 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 32 return nf_ct_ext_find(ct, NF_CT_EXT_TIMEOUT); 33 #else 34 return NULL; 35 #endif 36 } 37 38 static inline 39 struct nf_conn_timeout *nf_ct_timeout_ext_add(struct nf_conn *ct, 40 struct ctnl_timeout *timeout, 41 gfp_t gfp) 42 { 43 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 44 struct nf_conn_timeout *timeout_ext; 45 46 timeout_ext = nf_ct_ext_add(ct, NF_CT_EXT_TIMEOUT, gfp); 47 if (timeout_ext == NULL) 48 return NULL; 49 50 timeout_ext->timeout = timeout; 51 52 return timeout_ext; 53 #else 54 return NULL; 55 #endif 56 }; 57 58 static inline unsigned int * 59 nf_ct_timeout_lookup(struct net *net, struct nf_conn *ct, 60 struct nf_conntrack_l4proto *l4proto) 61 { 62 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 63 struct nf_conn_timeout *timeout_ext; 64 unsigned int *timeouts; 65 66 timeout_ext = nf_ct_timeout_find(ct); 67 if (timeout_ext) 68 timeouts = NF_CT_TIMEOUT_EXT_DATA(timeout_ext); 69 else 70 timeouts = l4proto->get_timeouts(net); 71 72 return timeouts; 73 #else 74 return l4proto->get_timeouts(net); 75 #endif 76 } 77 78 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 79 int nf_conntrack_timeout_init(void); 80 void nf_conntrack_timeout_fini(void); 81 #else 82 static inline int nf_conntrack_timeout_init(void) 83 { 84 return 0; 85 } 86 87 static inline void nf_conntrack_timeout_fini(void) 88 { 89 return; 90 } 91 #endif /* CONFIG_NF_CONNTRACK_TIMEOUT */ 92 93 #ifdef CONFIG_NF_CONNTRACK_TIMEOUT 94 extern struct ctnl_timeout *(*nf_ct_timeout_find_get_hook)(const char *name); 95 extern void (*nf_ct_timeout_put_hook)(struct ctnl_timeout *timeout); 96 #endif 97 98 #endif /* _NF_CONNTRACK_TIMEOUT_H */ 99