diff options
Diffstat (limited to 'include/net/netfilter/nf_conntrack_helper.h')
| -rw-r--r-- | include/net/netfilter/nf_conntrack_helper.h | 31 |
1 files changed, 26 insertions, 5 deletions
diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h index 1eaac1f4cd6a..e04fa7691e5d 100644 --- a/include/net/netfilter/nf_conntrack_helper.h +++ b/include/net/netfilter/nf_conntrack_helper.h @@ -29,9 +29,6 @@ struct nf_conntrack_helper { struct module *me; /* pointer to self */ const struct nf_conntrack_expect_policy *expect_policy; - /* length of internal data, ie. sizeof(struct nf_ct_*_master) */ - size_t data_len; - /* Tuple of things we will help (compared against server response) */ struct nf_conntrack_tuple tuple; @@ -49,9 +46,33 @@ struct nf_conntrack_helper { unsigned int expect_class_max; unsigned int flags; - unsigned int queue_num; /* For user-space helpers. */ + + /* For user-space helpers: */ + unsigned int queue_num; + /* length of userspace private data stored in nf_conn_help->data */ + u16 data_len; }; +/* Must be kept in sync with the classes defined by helpers */ +#define NF_CT_MAX_EXPECT_CLASSES 4 + +/* nf_conn feature for connections that have a helper */ +struct nf_conn_help { + /* Helper. if any */ + struct nf_conntrack_helper __rcu *helper; + + struct hlist_head expectations; + + /* Current number of expected connections */ + u8 expecting[NF_CT_MAX_EXPECT_CLASSES]; + + /* private helper information. */ + char data[32] __aligned(8); +}; + +#define NF_CT_HELPER_BUILD_BUG_ON(structsize) \ + BUILD_BUG_ON((structsize) > FIELD_SIZEOF(struct nf_conn_help, data)) + struct nf_conntrack_helper *__nf_conntrack_helper_find(const char *name, u16 l3num, u8 protonum); @@ -62,7 +83,7 @@ void nf_ct_helper_init(struct nf_conntrack_helper *helper, u16 l3num, u16 protonum, const char *name, u16 default_port, u16 spec_port, u32 id, const struct nf_conntrack_expect_policy *exp_pol, - u32 expect_class_max, u32 data_len, + u32 expect_class_max, int (*help)(struct sk_buff *skb, unsigned int protoff, struct nf_conn *ct, enum ip_conntrack_info ctinfo), |