1 /* 2 * Copyright 1993-2003 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 /* 6 * Copyright (c) 1990, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 */ 37 38 #ifndef _NET_IF_DL_H 39 #define _NET_IF_DL_H 40 41 /* from UCB 8.1 (Berkeley) 6/10/93 */ 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * A Link-Level Sockaddr may specify the interface in one of two 49 * ways: either by means of a system-provided index number (computed 50 * anew and possibly differently on every reboot), or by a human-readable 51 * string such as "il0" (for managerial convenience). 52 * 53 * Census taking actions, such as something akin to SIOCGCONF would return 54 * both the index and the human name. 55 * 56 * High volume transactions (such as giving a link-level ``from'' address 57 * in a recvfrom or recvmsg call) may be likely only to provide the indexed 58 * form, (which requires fewer copy operations and less space). 59 * 60 * The form and interpretation of the link-level address is purely a matter 61 * of convention between the device driver and its consumers; however, it is 62 * expected that all drivers for an interface of a given if_type will agree. 63 */ 64 65 /* 66 * Structure of a Link-Level sockaddr: 67 */ 68 struct sockaddr_dl { 69 ushort_t sdl_family; /* AF_LINK */ 70 ushort_t sdl_index; /* if != 0, system given index for interface */ 71 uchar_t sdl_type; /* interface type */ 72 uchar_t sdl_nlen; /* interface name length, no trailing 0 reqd. */ 73 uchar_t sdl_alen; /* link level address length */ 74 uchar_t sdl_slen; /* link layer selector length */ 75 char sdl_data[244]; /* contains both if name and ll address */ 76 }; 77 78 #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen)) 79 80 #ifdef __STDC__ 81 extern char *_link_ntoa(const unsigned char *, char *, int, int); 82 extern unsigned char *_link_aton(const char *, int *); 83 #else /* __STDC__ */ 84 extern char *_link_ntoa(); 85 extern unsigned char *_link_aton(); 86 #endif /* __STDC__ */ 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* _NET_IF_DL_H */ 93