This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / include / net / netfilter / nf_conntrack_helper.h

diff --git a/include/net/netfilter/nf_conntrack_helper.h b/include/net/netfilter/nf_conntrack_helper.h
new file mode 100644 (file)
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+++ b/include/net/netfilter/nf_conntrack_helper.h
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+/*
+ * 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>
+
+struct module;
+
+struct nf_conntrack_helper
+{      
+       struct list_head list;          /* Internal use. */
+
+       const char *name;               /* name of the module */
+       struct module *me;              /* pointer to self */
+       unsigned int max_expected;      /* Maximum number of concurrent 
+                                        * expected connections */
+       unsigned int timeout;           /* timeout for expecteds */
+
+       /* Mask of things we will help (compared against server response) */
+       struct nf_conntrack_tuple tuple;
+       struct nf_conntrack_tuple mask;
+       
+       /* Function to call when data passes; return verdict, or -1 to
+           invalidate. */
+       int (*help)(struct sk_buff **pskb,
+                   unsigned int protoff,
+                   struct nf_conn *ct,
+                   enum ip_conntrack_info conntrackinfo);
+
+       int (*to_nfattr)(struct sk_buff *skb, const struct nf_conn *ct);
+};
+
+extern int nf_conntrack_helper_register(struct nf_conntrack_helper *);
+extern void nf_conntrack_helper_unregister(struct nf_conntrack_helper *);
+
+/* Allocate space for an expectation: this is mandatory before calling
+   nf_conntrack_expect_related.  You will have to call put afterwards. */
+extern struct nf_conntrack_expect *
+nf_conntrack_expect_alloc(struct nf_conn *master);
+extern void nf_conntrack_expect_put(struct nf_conntrack_expect *exp);
+
+/* Add an expected connection: can have more than one per connection */
+extern int nf_conntrack_expect_related(struct nf_conntrack_expect *exp);
+extern void nf_conntrack_unexpect_related(struct nf_conntrack_expect *exp);
+
+#endif /*_NF_CONNTRACK_HELPER_H*/