1/* 2 * Copyright (c) 2000-2007 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * Copyright (c) 1990, 1991, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * This code is derived from the Stanford/CMU enet packet filter, 33 * (net/enet.c) distributed as part of 4.3BSD, and code contributed 34 * to Berkeley by Steven McCanne and Van Jacobson both of Lawrence 35 * Berkeley Laboratory. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed by the University of 48 * California, Berkeley and its contributors. 49 * 4. Neither the name of the University nor the names of its contributors 50 * may be used to endorse or promote products derived from this software 51 * without specific prior written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 55 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 56 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 57 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 58 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 59 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 60 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 61 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 62 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 63 * SUCH DAMAGE. 64 * 65 * @(#)bpfdesc.h 8.1 (Berkeley) 6/10/93 66 * 67 * $FreeBSD: src/sys/net/bpfdesc.h,v 1.14.2.1 2000/03/19 05:55:36 rwatson Exp $ 68 */ 69 70#ifndef _NET_BPFDESC_H_ 71#define _NET_BPFDESC_H_ 72#include <sys/appleapiopts.h> 73#ifdef KERNEL_PRIVATE 74/* 75 * The items in this header file should be wrapped in #ifdef KERNEL. 76 */ 77 78#include <sys/select.h> 79 80/* 81 * Descriptor associated with each open bpf file. 82 */ 83struct bpf_d { 84 struct bpf_d *bd_next; /* Linked list of descriptors */ 85 /* 86 * Buffer slots: two mbuf clusters buffer the incoming packets. 87 * The model has three slots. Sbuf is always occupied. 88 * sbuf (store) - Receive interrupt puts packets here. 89 * hbuf (hold) - When sbuf is full, put cluster here and 90 * wakeup read (replace sbuf with fbuf). 91 * fbuf (free) - When read is done, put cluster here. 92 * On receiving, if sbuf is full and fbuf is 0, packet is dropped. 93 */ 94 caddr_t bd_sbuf; /* store slot */ 95 caddr_t bd_hbuf; /* hold slot */ 96 caddr_t bd_fbuf; /* free slot */ 97 int bd_slen; /* current length of store buffer */ 98 int bd_hlen; /* current length of hold buffer */ 99 100 int bd_bufsize; /* absolute length of buffers */ 101 102 struct bpf_if * bd_bif; /* interface descriptor */ 103 u_long bd_rtout; /* Read timeout in 'ticks' */ 104 struct bpf_insn *bd_filter; /* filter code */ 105 u_long bd_rcount; /* number of packets received */ 106 u_long bd_dcount; /* number of packets dropped */ 107 108 u_char bd_promisc; /* true if listening promiscuously */ 109 u_char bd_state; /* idle, waiting, or timed out */ 110 u_char bd_immediate; /* true to return on packet arrival */ 111 int bd_async; /* non-zero if packet reception should generate signal */ 112 int bd_sig; /* signal to send upon packet reception */ 113#ifdef __APPLE__ 114 pid_t bd_sigio; 115#else 116 struct sigio * bd_sigio; /* information for async I/O */ 117#endif 118 119#if BSD < 199103 120 u_char bd_selcoll; /* true if selects collide */ 121 int bd_timedout; 122 struct proc * bd_selproc; /* process that last selected us */ 123#else 124 u_char bd_pad; /* explicit alignment */ 125 struct selinfo bd_sel; /* bsd select info */ 126#endif 127 int bd_hdrcmplt; /* false to fill in src lladdr automatically */ 128 int bd_seesent; /* true if bpf should see sent packets */ 129#if CONFIG_MACF_NET 130 struct label * bd_label; /* MAC label for descriptor */ 131#endif 132}; 133 134/* 135 * Descriptor associated with each attached hardware interface. 136 */ 137struct bpf_if { 138 struct bpf_if *bif_next; /* list of all interfaces */ 139 struct bpf_d *bif_dlist; /* descriptor list */ 140 u_int bif_dlt; /* link layer type */ 141 u_int bif_hdrlen; /* length of header (with padding) */ 142 struct ifnet *bif_ifp; /* corresponding interface */ 143 bpf_send_func bif_send; 144 bpf_tap_func bif_tap; 145}; 146 147#endif /* KERNEL_PRIVATE */ 148#endif 149