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	1	/*
	2	* Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
	11	*
	12	* This Original Code and all software distributed under the License are
	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/*
	23	* Copyright (c) 1990, 1991, 1993
	24	* The Regents of the University of California. All rights reserved.
	25	*
	26	* This code is derived from the Stanford/CMU enet packet filter,
	27	* (net/enet.c) distributed as part of 4.3BSD, and code contributed
	28	* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
	29	* Berkeley Laboratory.
	30	*
	31	* Redistribution and use in source and binary forms, with or without
	32	* modification, are permitted provided that the following conditions
	33	* are met:
	34	* 1. Redistributions of source code must retain the above copyright
	35	* notice, this list of conditions and the following disclaimer.
	36	* 2. Redistributions in binary form must reproduce the above copyright
	37	* notice, this list of conditions and the following disclaimer in the
	38	* documentation and/or other materials provided with the distribution.
	39	* 3. All advertising materials mentioning features or use of this software
	40	* must display the following acknowledgement:
	41	* This product includes software developed by the University of
	42	* California, Berkeley and its contributors.
	43	* 4. Neither the name of the University nor the names of its contributors
	44	* may be used to endorse or promote products derived from this software
	45	* without specific prior written permission.
	46	*
	47	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	48	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	49	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	50	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	51	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	52	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	53	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	54	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	55	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	56	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	57	* SUCH DAMAGE.
	58	*
	59	* @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93
	60	*
	61	* $FreeBSD: src/sys/net/bpfdesc.h,v 1.14.2.1 2000/03/19 05:55:36 rwatson Exp $
	62	*/
	63
	64	#ifndef _NET_BPFDESC_H_
	65	#define _NET_BPFDESC_H_
	66	#include <sys/appleapiopts.h>
	67	#ifdef __APPLE_API_PRIVATE
	68	/*
	69	* The items in this header file should be wrapped in #ifdef KERNEL.
	70	*/
	71
	72	#include <sys/select.h>
	73
	74	/*
	75	* Descriptor associated with each open bpf file.
	76	*/
	77	struct bpf_d {
	78	struct bpf_d bd_next; / Linked list of descriptors */
	79	/*
	80	* Buffer slots: two mbuf clusters buffer the incoming packets.
	81	* The model has three slots. Sbuf is always occupied.
	82	* sbuf (store) - Receive interrupt puts packets here.
	83	* hbuf (hold) - When sbuf is full, put cluster here and
	84	* wakeup read (replace sbuf with fbuf).
	85	* fbuf (free) - When read is done, put cluster here.
	86	* On receiving, if sbuf is full and fbuf is 0, packet is dropped.
	87	*/
	88	caddr_t bd_sbuf; /* store slot */
	89	caddr_t bd_hbuf; /* hold slot */
	90	caddr_t bd_fbuf; /* free slot */
	91	int bd_slen; /* current length of store buffer */
	92	int bd_hlen; /* current length of hold buffer */
	93
	94	int bd_bufsize; /* absolute length of buffers */
	95
	96	struct bpf_if * bd_bif; /* interface descriptor */
	97	u_long bd_rtout; /* Read timeout in 'ticks' */
	98	struct bpf_insn bd_filter; / filter code */
	99	u_long bd_rcount; /* number of packets received */
	100	u_long bd_dcount; /* number of packets dropped */
	101
	102	u_char bd_promisc; /* true if listening promiscuously */
	103	u_char bd_state; /* idle, waiting, or timed out */
	104	u_char bd_immediate; /* true to return on packet arrival */
	105	int bd_async; /* non-zero if packet reception should generate signal */
	106	int bd_sig; /* signal to send upon packet reception */
	107	#ifdef __APPLE__
	108	pid_t bd_sigio;
	109	#else
	110	struct sigio * bd_sigio; /* information for async I/O */
	111	#endif
	112
	113	#if BSD < 199103
	114	u_char bd_selcoll; /* true if selects collide */
	115	int bd_timedout;
	116	struct proc * bd_selproc; /* process that last selected us */
	117	#else
	118	u_char bd_pad; /* explicit alignment */
	119	struct selinfo bd_sel; /* bsd select info */
	120	#endif
	121	int bd_hdrcmplt; /* false to fill in src lladdr automatically */
	122	int bd_seesent; /* true if bpf should see sent packets */
	123
	124	};
	125
	126	/*
	127	* Descriptor associated with each attached hardware interface.
	128	*/
	129	struct bpf_if {
	130	struct bpf_if bif_next; / list of all interfaces */
	131	struct bpf_d bif_dlist; / descriptor list */
	132	u_int bif_dlt; /* link layer type */
	133	u_int bif_hdrlen; /* length of header (with padding) */
	134	struct ifnet bif_ifp; / corresponding interface */
	135	};
	136
	137	#endif /* __APPLE_API_PRIVATE */
	138	#endif