Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / net / netfilter / nf_conntrack_helper.h

diff --git a/kernel/include/net/netfilter/nf_conntrack_helper.h b/kernel/include/net/netfilter/nf_conntrack_helper.h
new file mode 100644 (file)
index 0000000..6cf614b
--- /dev/null
+++ b/kernel/include/net/netfilter/nf_conntrack_helper.h
@@ -0,0 +1,119 @@
+/*
+ * connection tracking helpers.
+ *
+ * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
+ *     - generalize L3 protocol dependent part.
+ *
+ * Derived from include/linux/netfiter_ipv4/ip_conntrack_helper.h
+ */
+
+#ifndef _NF_CONNTRACK_HELPER_H
+#define _NF_CONNTRACK_HELPER_H
+#include <net/netfilter/nf_conntrack.h>
+#include <net/netfilter/nf_conntrack_extend.h>
+#include <net/netfilter/nf_conntrack_expect.h>
+
+struct module;
+
+enum nf_ct_helper_flags {
+       NF_CT_HELPER_F_USERSPACE        = (1 << 0),
+       NF_CT_HELPER_F_CONFIGURED       = (1 << 1),
+};
+
+#define NF_CT_HELPER_NAME_LEN  16
+
+struct nf_conntrack_helper {
+       struct hlist_node hnode;        /* Internal use. */
+
+       char name[NF_CT_HELPER_NAME_LEN]; /* name of the module */
+       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;
+
+       /* Function to call when data passes; return verdict, or -1 to
+           invalidate. */
+       int (*help)(struct sk_buff *skb,
+                   unsigned int protoff,
+                   struct nf_conn *ct,
+                   enum ip_conntrack_info conntrackinfo);
+
+       void (*destroy)(struct nf_conn *ct);
+
+       int (*from_nlattr)(struct nlattr *attr, struct nf_conn *ct);
+       int (*to_nlattr)(struct sk_buff *skb, const struct nf_conn *ct);
+       unsigned int expect_class_max;
+
+       unsigned int flags;
+       unsigned int queue_num;         /* For user-space helpers. */
+};
+
+struct nf_conntrack_helper *__nf_conntrack_helper_find(const char *name,
+                                                      u16 l3num, u8 protonum);
+
+struct nf_conntrack_helper *nf_conntrack_helper_try_module_get(const char *name,
+                                                              u16 l3num,
+                                                              u8 protonum);
+
+int nf_conntrack_helper_register(struct nf_conntrack_helper *);
+void nf_conntrack_helper_unregister(struct nf_conntrack_helper *);
+
+struct nf_conn_help *nf_ct_helper_ext_add(struct nf_conn *ct,
+                                         struct nf_conntrack_helper *helper,
+                                         gfp_t gfp);
+
+int __nf_ct_try_assign_helper(struct nf_conn *ct, struct nf_conn *tmpl,
+                             gfp_t flags);
+
+void nf_ct_helper_destroy(struct nf_conn *ct);
+
+static inline struct nf_conn_help *nfct_help(const struct nf_conn *ct)
+{
+       return nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
+}
+
+static inline void *nfct_help_data(const struct nf_conn *ct)
+{
+       struct nf_conn_help *help;
+
+       help = nf_ct_ext_find(ct, NF_CT_EXT_HELPER);
+
+       return (void *)help->data;
+}
+
+int nf_conntrack_helper_pernet_init(struct net *net);
+void nf_conntrack_helper_pernet_fini(struct net *net);
+
+int nf_conntrack_helper_init(void);
+void nf_conntrack_helper_fini(void);
+
+int nf_conntrack_broadcast_help(struct sk_buff *skb, unsigned int protoff,
+                               struct nf_conn *ct,
+                               enum ip_conntrack_info ctinfo,
+                               unsigned int timeout);
+
+struct nf_ct_helper_expectfn {
+       struct list_head head;
+       const char *name;
+       void (*expectfn)(struct nf_conn *ct, struct nf_conntrack_expect *exp);
+};
+
+__printf(3,4)
+void nf_ct_helper_log(struct sk_buff *skb, const struct nf_conn *ct,
+                     const char *fmt, ...);
+
+void nf_ct_helper_expectfn_register(struct nf_ct_helper_expectfn *n);
+void nf_ct_helper_expectfn_unregister(struct nf_ct_helper_expectfn *n);
+struct nf_ct_helper_expectfn *
+nf_ct_helper_expectfn_find_by_name(const char *name);
+struct nf_ct_helper_expectfn *
+nf_ct_helper_expectfn_find_by_symbol(const void *symbol);
+
+extern struct hlist_head *nf_ct_helper_hash;
+extern unsigned int nf_ct_helper_hsize;
+
+#endif /*_NF_CONNTRACK_HELPER_H*/