/* $FreeBSD$ */ /* * 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/queue.h> struct mbuf; struct ifnet; /* * 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) __P((void *, int, struct ifnet *, int, struct mbuf **)); 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; struct pfil_head { pfil_list_t ph_in; pfil_list_t ph_out; int ph_init; } pfil_head_t; struct packet_filter_hook *pfil_hook_get __P((int, struct pfil_head *)); int pfil_add_hook __P((int (*func) __P((void *, int, struct ifnet *, int, struct mbuf **)), int, struct pfil_head *)); int pfil_remove_hook __P((int (*func) __P((void *, int, struct ifnet *, int, struct mbuf **)), int, struct pfil_head *)); /* XXX */ #if defined(_KERNEL) && !defined(KLD_MODULE) #include "opt_ipfilter.h" #endif #if IPFILTER > 0 #ifdef PFIL_HOOKS #undef PFIL_HOOKS #endif #define PFIL_HOOKS #endif /* IPFILTER */ #endif /* _NET_PFIL_H_ */