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, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)if_dl.h 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: src/sys/net/if_dl.h,v 1.10 2000/03/01 02:46:25 archie Exp $ 62 */ 63 64 #ifndef _NET_IF_DL_H_ 65 #define _NET_IF_DL_H_ 66 #include <sys/appleapiopts.h> 67 68 #include <sys/_types.h> /* __offsetof() */ 69 #include <sys/types.h> 70 71 #ifdef BSD_KERNEL_PRIVATE 72 #define DLIL_SDLMAXLEN 64 73 #endif /* BSD_KERNEL_PRIVATE */ 74 75 /* 76 * A Link-Level Sockaddr may specify the interface in one of two 77 * ways: either by means of a system-provided index number (computed 78 * anew and possibly differently on every reboot), or by a human-readable 79 * string such as "il0" (for managerial convenience). 80 * 81 * Census taking actions, such as something akin to SIOCGCONF would return 82 * both the index and the human name. 83 * 84 * High volume transactions (such as giving a link-level ``from'' address 85 * in a recvfrom or recvmsg call) may be likely only to provide the indexed 86 * form, (which requires fewer copy operations and less space). 87 * 88 * The form and interpretation of the link-level address is purely a matter 89 * of convention between the device driver and its consumers; however, it is 90 * expected that all drivers for an interface of a given if_type will agree. 91 */ 92 93 /* 94 * Structure of a Link-Level sockaddr: 95 */ 96 struct sockaddr_dl { 97 u_char sdl_len; /* Total length of sockaddr */ 98 u_char sdl_family; /* AF_LINK */ 99 u_short sdl_index; /* if != 0, system given index for interface */ 100 u_char sdl_type; /* interface type */ 101 u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */ 102 u_char sdl_alen; /* link level address length */ 103 u_char sdl_slen; /* link layer selector length */ 104 char sdl_data[12]; 105 /* minimum work area, can be larger; 106 * contains both if name and ll address */ 107 #ifndef __APPLE__ 108 /* For TokenRing */ 109 u_short sdl_rcf; /* source routing control */ 110 u_short sdl_route[16]; /* source routing information */ 111 #endif 112 }; 113 114 #define LLADDR(s) ((caddr_t)(s) + __offsetof(struct sockaddr_dl, sdl_data) + (s)->sdl_nlen) 115 #ifdef KERNEL_PRIVATE 116 #define CONST_LLADDR(s) ((const u_char*)(s) + __offsetof(struct sockaddr_dl, sdl_data) + (s)->sdl_nlen) 117 #endif 118 119 #ifdef BSD_KERNEL_PRIVATE 120 #define SDL(s) ((struct sockaddr_dl *)(void *)s) 121 #endif 122 123 #ifndef KERNEL 124 125 #include <sys/cdefs.h> 126 127 __BEGIN_DECLS 128 void link_addr(const char *, struct sockaddr_dl *); 129 char *link_ntoa(const struct sockaddr_dl *); 130 __END_DECLS 131 132 #endif /* !KERNEL */ 133 134 #endif 135