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author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-10-09 22:42:09 +0200 |
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committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2013-10-10 09:06:58 +0200 |
commit | bceabc95c1c85d793200446fa85f1ddc6313ea29 (patch) | |
tree | 973c8bd8deca9fd69913f2895cc91e0e6114d46c /freebsd/sys/net/pfil.h | |
parent | Add FreeBSD sources as a submodule (diff) | |
download | rtems-libbsd-bceabc95c1c85d793200446fa85f1ddc6313ea29.tar.bz2 |
Move files to match FreeBSD layout
Diffstat (limited to 'freebsd/sys/net/pfil.h')
-rw-r--r-- | freebsd/sys/net/pfil.h | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/freebsd/sys/net/pfil.h b/freebsd/sys/net/pfil.h new file mode 100644 index 00000000..78ab0518 --- /dev/null +++ b/freebsd/sys/net/pfil.h @@ -0,0 +1,117 @@ +/* $FreeBSD$ */ +/* $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_HH_ +#define _NET_PFIL_HH_ + +#include <freebsd/sys/systm.h> +#include <freebsd/sys/queue.h> +#include <freebsd/sys/_lock.h> +#include <freebsd/sys/_mutex.h> +#include <freebsd/sys/lock.h> +#include <freebsd/sys/rmlock.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; +}; + +#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; + struct rmlock ph_lock; + 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_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_run_hooks(struct pfil_head *, struct mbuf **, struct ifnet *, + int, struct inpcb *inp); + +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_LOCK_INIT(p) \ + rm_init_flags(&(p)->ph_lock, "PFil hook read/write mutex", RM_RECURSE) +#define PFIL_LOCK_DESTROY(p) rm_destroy(&(p)->ph_lock) +#define PFIL_RLOCK(p, t) rm_rlock(&(p)->ph_lock, (t)) +#define PFIL_WLOCK(p) rm_wlock(&(p)->ph_lock) +#define PFIL_RUNLOCK(p, t) rm_runlock(&(p)->ph_lock, (t)) +#define PFIL_WUNLOCK(p) rm_wunlock(&(p)->ph_lock) +#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_HH_ */ |