[unix-history] / sys / net / bpfdesc.h

/*-
 * Copyright (c) 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from the Stanford/CMU enet packet filter,
 * (net/enet.c) distributed as part of 4.3BSD, and code contributed
 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 
 * Berkeley Laboratory.
 *
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
 *
 *	from: @(#)bpfdesc.h	7.1 (Berkeley) 5/7/91
 *	$Id: bpfdesc.h,v 1.2 1993/10/16 17:43:09 rgrimes Exp $
 */

#ifndef _NET_BPFDESC_H_
#define _NET_BPFDESC_H_ 1

/*
 * Descriptor associated with each open bpf file.
 */
struct bpf_d {
	struct bpf_d	*bd_next;	/* Linked list of descriptors */
	/*
	 * Buffer slots: two mbuf clusters buffer the incoming packets.
	 *   The model has three slots.  Sbuf is always occupied.
	 *   sbuf (store) - Receive interrupt puts packets here.
	 *   hbuf (hold) - When sbuf is full, put cluster here and
	 *                 wakeup read (replace sbuf with fbuf).
	 *   fbuf (free) - When read is done, put cluster here.
	 * On receiving, if sbuf is full and fbuf is 0, packet is dropped.
	 */
	caddr_t		bd_sbuf;	/* store slot */
	caddr_t		bd_hbuf;	/* hold slot */
	caddr_t		bd_fbuf;	/* free slot */
	int 		bd_slen;	/* current length of store buffer */
	int 		bd_hlen;	/* current length of hold buffer */

	int		bd_bufsize;	/* absolute length of buffers */

	struct bpf_if *	bd_bif;		/* interface descriptor */
	u_long		bd_rtout;	/* Read timeout in 'ticks' */
	struct bpf_insn *bd_filter; 	/* filter code */
	u_long		bd_rcount;	/* number of packets received */
	u_long		bd_dcount;	/* number of packets dropped */

	u_char		bd_promisc;	/* true if listening promiscuously */
	u_char		bd_state;	/* idle, waiting, or timed out */
	u_char		bd_immediate;	/* true to return on packet arrival */
	u_char		bd_selcoll;	/* true if selects collide */
	int		bd_timedout;
	struct proc *	bd_selproc;	/* process that last selected us */
};

/*
 * Descriptor associated with each attached hardware interface.
 */
struct bpf_if {
	struct bpf_if *bif_next;	/* list of all interfaces */
	struct bpf_d *bif_dlist;	/* descriptor list */
	struct bpf_if **bif_driverp;	/* pointer into softc */
	u_int bif_dlt;			/* link layer type */
	u_int bif_hdrlen;		/* length of header (with padding) */
	struct ifnet *bif_ifp;		/* correspoding interface */
};
#endif /* _NET_BPFDESC_H_ */
Commit	Line	Data
15637ed4 RG	1	/*-
	2	* Copyright (c) 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* This code is derived from the Stanford/CMU enet packet filter,
	6	* (net/enet.c) distributed as part of 4.3BSD, and code contributed
	7	* to Berkeley by Steven McCanne and Van Jacobson both of Lawrence
	8	* Berkeley Laboratory.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. All advertising materials mentioning features or use of this software
	19	* must display the following acknowledgement:
	20	* This product includes software developed by the University of
	21	* California, Berkeley and its contributors.
	22	* 4. Neither the name of the University nor the names of its contributors
	23	* may be used to endorse or promote products derived from this software
	24	* without specific prior written permission.
	25	*
	26	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	27	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	30	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	31	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	32	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	33	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	34	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	35	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	36	* SUCH DAMAGE.
	37	*
70c5ff60	38	* from: @(#)bpfdesc.h 7.1 (Berkeley) 5/7/91
8ace4366	39	* $Id: bpfdesc.h,v 1.2 1993/10/16 17:43:09 rgrimes Exp $
15637ed4 RG	40	*/
15637ed4 RG	41
8ace4366 GW	42	#ifndef _NET_BPFDESC_H_
	43	#define _NET_BPFDESC_H_ 1
	44
15637ed4 RG	45	/*
	46	* Descriptor associated with each open bpf file.
	47	*/
	48	struct bpf_d {
	49	struct bpf_d bd_next; / Linked list of descriptors */
	50	/*
	51	* Buffer slots: two mbuf clusters buffer the incoming packets.
	52	* The model has three slots. Sbuf is always occupied.
	53	* sbuf (store) - Receive interrupt puts packets here.
	54	* hbuf (hold) - When sbuf is full, put cluster here and
	55	* wakeup read (replace sbuf with fbuf).
	56	* fbuf (free) - When read is done, put cluster here.
	57	* On receiving, if sbuf is full and fbuf is 0, packet is dropped.
	58	*/
	59	caddr_t bd_sbuf; /* store slot */
	60	caddr_t bd_hbuf; /* hold slot */
	61	caddr_t bd_fbuf; /* free slot */
	62	int bd_slen; /* current length of store buffer */
	63	int bd_hlen; /* current length of hold buffer */
	64
	65	int bd_bufsize; /* absolute length of buffers */
	66
	67	struct bpf_if * bd_bif; /* interface descriptor */
	68	u_long bd_rtout; /* Read timeout in 'ticks' */
	69	struct bpf_insn bd_filter; / filter code */
	70	u_long bd_rcount; /* number of packets received */
	71	u_long bd_dcount; /* number of packets dropped */
	72
	73	u_char bd_promisc; /* true if listening promiscuously */
	74	u_char bd_state; /* idle, waiting, or timed out */
	75	u_char bd_immediate; /* true to return on packet arrival */
	76	u_char bd_selcoll; /* true if selects collide */
	77	int bd_timedout;
	78	struct proc * bd_selproc; /* process that last selected us */
	79	};
	80
	81	/*
	82	* Descriptor associated with each attached hardware interface.
	83	*/
	84	struct bpf_if {
	85	struct bpf_if bif_next; / list of all interfaces */
	86	struct bpf_d bif_dlist; / descriptor list */
	87	struct bpf_if *bif_driverp; / pointer into softc */
	88	u_int bif_dlt; /* link layer type */
	89	u_int bif_hdrlen; /* length of header (with padding) */
	90	struct ifnet bif_ifp; / correspoding interface */
	91	};
8ace4366	92	#endif /* _NET_BPFDESC_H_ */