1/* 2 * Copyright (c) 2000-2011 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#include <kern/thread_call.h> 80 81/* 82 * Descriptor associated with each open bpf file. 83 */ 84struct bpf_d { 85 struct bpf_d *bd_next; /* Linked list of descriptors */ 86 /* 87 * Buffer slots: two mbuf clusters buffer the incoming packets. 88 * The model has three slots. Sbuf is always occupied. 89 * sbuf (store) - Receive interrupt puts packets here. 90 * hbuf (hold) - When sbuf is full, put cluster here and 91 * wakeup read (replace sbuf with fbuf). 92 * fbuf (free) - When read is done, put cluster here. 93 * On receiving, if sbuf is full and fbuf is 0, packet is dropped. 94 */ 95 caddr_t bd_sbuf; /* store slot */ 96 caddr_t bd_hbuf; /* hold slot */ 97 caddr_t bd_fbuf; /* free slot */ 98 int bd_slen; /* current length of store buffer */ 99 int bd_hlen; /* current length of hold buffer */ 100 101 int bd_bufsize; /* absolute length of buffers */ 102 int bd_hbuf_read; /* reading from hbuf */ 103 104 struct bpf_if *bd_bif; /* interface descriptor */ 105 u_int32_t bd_rtout; /* Read timeout in 'ticks' */ 106 struct bpf_insn *bd_filter; /* filter code */ 107 u_int32_t bd_rcount; /* number of packets received */ 108 u_int32_t bd_dcount; /* number of packets dropped */ 109 110 u_char bd_promisc; /* true if listening promiscuously */ 111 u_char bd_state; /* idle, waiting, or timed out */ 112 u_char bd_immediate; /* true to return on packet arrival */ 113 int bd_async; /* non-zero if packet reception should generate signal */ 114 int bd_sig; /* signal to send upon packet reception */ 115#ifdef __APPLE__ 116 pid_t bd_sigio; 117#else 118 struct sigio * bd_sigio; /* information for async I/O */ 119#endif 120 121#if BSD < 199103 122 u_char bd_selcoll; /* true if selects collide */ 123 int bd_timedout; 124 struct proc * bd_selproc; /* process that last selected us */ 125#else 126 u_char bd_pad; /* explicit alignment */ 127 struct selinfo bd_sel; /* bsd select info */ 128#endif 129 int bd_hdrcmplt; /* false to fill in src lladdr automatically */ 130 int bd_seesent; /* true if bpf should see sent packets */ 131 int bd_oflags; /* device open flags */ 132 thread_call_t bd_thread_call; /* for BPF timeouts with select */ 133#if CONFIG_MACF_NET 134 struct label * bd_label; /* MAC label for descriptor */ 135#endif 136 int bd_traffic_class; /* traffic service class */ 137 int bd_extendedhdr; /* process req. the extended header */ 138}; 139 140/* Values for bd_state */ 141#define BPF_IDLE 0 /* no select in progress or kqueue pending */ 142#define BPF_WAITING 1 /* waiting for read timeout in select/kqueue */ 143#define BPF_TIMED_OUT 2 /* read timeout has expired in select/kqueue */ 144#define BPF_DRAINING 3 /* waiting for timeout routine to finish during close */ 145 146/* Test whether a BPF is ready for read(). */ 147#define bpf_ready(bd) ((bd)->bd_hlen != 0 || \ 148 (((bd)->bd_immediate || (bd)->bd_state == BPF_TIMED_OUT) && \ 149 (bd)->bd_slen != 0)) 150 151 152/* 153 * Descriptor associated with each attached hardware interface. 154 */ 155struct bpf_if { 156 struct bpf_if *bif_next; /* list of all interfaces */ 157 struct bpf_d *bif_dlist; /* descriptor list */ 158 u_int bif_dlt; /* link layer type */ 159 u_int bif_hdrlen; /* length of header (with padding) */ 160 u_int bif_exthdrlen; /* length of ext header */ 161 struct ifnet *bif_ifp; /* corresponding interface */ 162 bpf_send_func bif_send; 163 bpf_tap_func bif_tap; 164}; 165 166#endif /* KERNEL_PRIVATE */ 167#endif 168