[src/trunk]: src/sys/net/npf Add npf_conn.h missed in the previous commit.

[rmind <rmind%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/32250d5b400d
branches:  trunk
changeset: 330736:32250d5b400d
user:      rmind <rmind%NetBSD.org@localhost>
date:      Sat Jul 19 19:14:21 2014 +0000

description:
Add npf_conn.h missed in the previous commit.

diffstat:

 sys/net/npf/npf_conn.h |  139 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 139 insertions(+), 0 deletions(-)

diffs (143 lines):

diff -r c963658a6761 -r 32250d5b400d sys/net/npf/npf_conn.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/net/npf/npf_conn.h    Sat Jul 19 19:14:21 2014 +0000
@@ -0,0 +1,139 @@
+/*     $NetBSD: npf_conn.h,v 1.1 2014/07/19 19:14:21 rmind Exp $       */
+
+/*-
+ * Copyright (c) 2009-2014 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This material is based upon work partially supported by The
+ * NetBSD Foundation under a contract with Mindaugas Rasiukevicius.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef _NPF_CONN_H_
+#define _NPF_CONN_H_
+
+#if !defined(_KERNEL)
+#error "kernel-level header only"
+#endif
+
+#include <sys/types.h>
+
+#include "npf_impl.h"
+
+typedef struct npf_connkey npf_connkey_t;
+
+#if defined(__NPF_CONN_PRIVATE)
+
+#include <sys/rbtree.h>
+
+#define        NPF_CONN_NKEYWORDS      (2 + ((sizeof(npf_addr_t) * 2) >> 2))
+#define        NPF_CONN_MAXKEYLEN      (NPF_CONN_NKEYWORDS * sizeof(uint32_t))
+#define        NPF_CONN_GETALEN(key)   ((key)->ck_key[0] & 0xffff)
+#define        NPF_CONN_KEYLEN(key)    (8 + (2 * NPF_CONN_GETALEN(key)))
+
+struct npf_connkey {
+       /* Entry node and back-pointer to the actual connection. */
+       rb_node_t               ck_rbnode;
+       uint32_t                ck_key[NPF_CONN_NKEYWORDS];
+       npf_conn_t *            ck_backptr;
+};
+
+/*
+ * The main connection tracking structure.
+ */
+
+struct npf_conn {
+       /*
+        * Connection "forwards" and "backwards" entries, plus the
+        * interface ID (if zero, then the state is global).
+        */
+       npf_connkey_t           c_forw_entry;
+       npf_connkey_t           c_back_entry;
+       u_int                   c_proto;
+       u_int                   c_ifid;
+
+       /* Flags and entry in the connection database or G/C list. */
+       u_int                   c_flags;
+       npf_conn_t *            c_next;
+
+       /* Associated rule procedure or NAT (if any). */
+       npf_rproc_t *           c_rproc;
+       npf_nat_t *             c_nat;
+
+       /*
+        * The protocol state, reference count and the last activity
+        * time (used to calculate expiration time).
+        */
+       kmutex_t                c_lock;
+       npf_state_t             c_state;
+       u_int                   c_refcnt;
+       struct timespec         c_atime;
+};
+
+#endif
+
+/*
+ * Connection tracking interface.
+ */
+void           npf_conn_sysinit(void);
+void           npf_conn_sysfini(void);
+void           npf_conn_tracking(bool);
+
+bool           npf_conn_conkey(const npf_cache_t *, npf_connkey_t *, bool);
+npf_conn_t *   npf_conn_lookup(const npf_cache_t *, const nbuf_t *,
+                   const int, bool *);
+npf_conn_t *   npf_conn_inspect(npf_cache_t *, nbuf_t *, const int, int *);
+npf_conn_t *   npf_conn_establish(npf_cache_t *, nbuf_t *, int, bool);
+void           npf_conn_release(npf_conn_t *);
+void           npf_conn_expire(npf_conn_t *);
+bool           npf_conn_pass(const npf_conn_t *, npf_rproc_t **);
+void           npf_conn_setpass(npf_conn_t *, npf_rproc_t *);
+int            npf_conn_setnat(const npf_cache_t *, npf_conn_t *,
+                   npf_nat_t *, u_int);
+npf_nat_t *    npf_conn_retnat(npf_conn_t *, const int, bool *);
+
+void           npf_conn_load(npf_conndb_t *);
+int            npf_conn_save(prop_array_t, prop_array_t);
+int            npf_conn_restore(npf_conndb_t *, prop_dictionary_t);
+
+void           npf_conn_print(const npf_conn_t *);
+
+/*
+ * Connection database (aka state table) interface.
+ */
+npf_conndb_t * npf_conndb_create(void);
+void           npf_conndb_destroy(npf_conndb_t *);
+
+npf_conn_t *   npf_conndb_lookup(npf_conndb_t *, const npf_connkey_t *,
+                   bool *);
+bool           npf_conndb_insert(npf_conndb_t *, npf_connkey_t *,
+                   npf_conn_t *);
+npf_conn_t *   npf_conndb_remove(npf_conndb_t *, const npf_connkey_t *);
+
+void           npf_conndb_enqueue(npf_conndb_t *, npf_conn_t *);
+void           npf_conndb_dequeue(npf_conndb_t *, npf_conn_t *,
+                   npf_conn_t *);
+npf_conn_t *   npf_conndb_getlist(npf_conndb_t *);
+void           npf_conndb_settail(npf_conndb_t *, npf_conn_t *);
+
+#endif /* _NPF_CONN_H_ */