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