Remove the old dummynet directory and update the new code with the missing files...

[ipfw.git] / dummynet2 / include / net / pfil.h

diff --git a/dummynet2/include/net/pfil.h b/dummynet2/include/net/pfil.h
new file mode 100644 (file)
index 0000000..19a3d9c
--- /dev/null
+++ b/dummynet2/include/net/pfil.h
@@ -0,0 +1,118 @@
+/*     $FreeBSD: src/sys/net/pfil.h,v 1.16 2007/06/08 12:43:25 gallatin Exp $ */
+/*     $NetBSD: pfil.h,v 1.22 2003/06/23 12:57:08 martin Exp $ */
+
+/*-
+ * Copyright (c) 1996 Matthew R. Green
+ * All rights reserved.
+ *
+ * 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.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 _NET_PFIL_H_
+#define _NET_PFIL_H_
+
+#include <sys/systm.h>
+#include <sys/queue.h>
+#include <sys/_lock.h>
+#include <sys/_mutex.h>
+#include <sys/lock.h>
+#include <sys/rwlock.h>
+
+struct mbuf;
+struct ifnet;
+struct inpcb;
+
+/*
+ * The packet filter hooks are designed for anything to call them to
+ * possibly intercept the packet.
+ */
+struct packet_filter_hook {
+        TAILQ_ENTRY(packet_filter_hook) pfil_link;
+       int     (*pfil_func)(void *, struct mbuf **, struct ifnet *, int, struct inpcb *);
+       void    *pfil_arg;
+       int     pfil_flags;
+};
+
+#define PFIL_IN                0x00000001
+#define PFIL_OUT       0x00000002
+#define PFIL_WAITOK    0x00000004
+#define PFIL_ALL       (PFIL_IN|PFIL_OUT)
+
+typedef        TAILQ_HEAD(pfil_list, packet_filter_hook) pfil_list_t;
+
+#define        PFIL_TYPE_AF            1       /* key is AF_* type */
+#define        PFIL_TYPE_IFNET         2       /* key is ifnet pointer */
+
+struct pfil_head {
+       pfil_list_t     ph_in;
+       pfil_list_t     ph_out;
+       int             ph_type;
+       int             ph_nhooks;
+#if defined( __linux__ ) || defined( _WIN32 )
+       rwlock_t        ph_mtx;
+#else
+       struct rwlock   ph_mtx;
+#endif
+       union {
+               u_long          phu_val;
+               void            *phu_ptr;
+       } ph_un;
+#define        ph_af           ph_un.phu_val
+#define        ph_ifnet        ph_un.phu_ptr
+       LIST_ENTRY(pfil_head) ph_list;
+};
+
+int    pfil_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *,
+           int, struct inpcb *inp);
+
+int    pfil_add_hook(int (*func)(void *, struct mbuf **,
+           struct ifnet *, int, struct inpcb *), void *, int, struct pfil_head *);
+int    pfil_remove_hook(int (*func)(void *, struct mbuf **,
+           struct ifnet *, int, struct inpcb *), void *, int, struct pfil_head *);
+
+int    pfil_head_register(struct pfil_head *);
+int    pfil_head_unregister(struct pfil_head *);
+
+struct pfil_head *pfil_head_get(int, u_long);
+
+#define        PFIL_HOOKED(p) ((p)->ph_nhooks > 0)
+#define PFIL_RLOCK(p) rw_rlock(&(p)->ph_mtx)
+#define PFIL_WLOCK(p) rw_wlock(&(p)->ph_mtx)
+#define PFIL_RUNLOCK(p) rw_runlock(&(p)->ph_mtx)
+#define PFIL_WUNLOCK(p) rw_wunlock(&(p)->ph_mtx)
+#define PFIL_LIST_LOCK() mtx_lock(&pfil_global_lock)
+#define PFIL_LIST_UNLOCK() mtx_unlock(&pfil_global_lock)
+
+static __inline struct packet_filter_hook *
+pfil_hook_get(int dir, struct pfil_head *ph)
+{
+       if (dir == PFIL_IN)
+               return (TAILQ_FIRST(&ph->ph_in));
+       else if (dir == PFIL_OUT)
+               return (TAILQ_FIRST(&ph->ph_out));
+       else
+               return (NULL);
+}
+
+#endif /* _NET_PFIL_H_ */