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- /*
- * Copyright (c) 1990, 1991, 1993
- * 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.
- *
- * @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93
- *
- * @(#) $Header: bpfdesc.h,v 1.9 91/10/27 21:22:38 mccanne Exp $ (LBL)
- */
-
- /*
- * 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 */
- #if BSD < 199103
- u_char bd_selcoll; /* true if selects collide */
- int bd_timedout;
- struct proc * bd_selproc; /* process that last selected us */
- #else
- u_char bd_pad; /* explicit alignment */
- struct selinfo bd_sel; /* bsd select info */
- #endif
- };
-
- /*
- * 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 */
- };
-
- #ifdef KERNEL
- int bpf_setf __P((struct bpf_d *, struct bpf_program *));
- #endif
-