1 | /* |
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2 | * Copyright (c) 1990, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 4. Neither the name of the University nor the names of its contributors |
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14 | * may be used to endorse or promote products derived from this software |
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15 | * without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 | * SUCH DAMAGE. |
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28 | * |
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29 | * @(#)if_dl.h 8.1 (Berkeley) 6/10/93 |
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30 | * $FreeBSD: src/sys/net/if_dl.h,v 1.14 2005/01/07 01:45:34 imp Exp $ |
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31 | */ |
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32 | |
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33 | /* |
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34 | * $Id$ |
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35 | */ |
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36 | |
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37 | #ifndef _NET_IF_DL_H_ |
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38 | #define _NET_IF_DL_H_ |
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39 | |
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40 | /* |
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41 | * A Link-Level Sockaddr may specify the interface in one of two |
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42 | * ways: either by means of a system-provided index number (computed |
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43 | * anew and possibly differently on every reboot), or by a human-readable |
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44 | * string such as "il0" (for managerial convenience). |
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45 | * |
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46 | * Census taking actions, such as something akin to SIOCGCONF would return |
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47 | * both the index and the human name. |
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48 | * |
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49 | * High volume transactions (such as giving a link-level ``from'' address |
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50 | * in a recvfrom or recvmsg call) may be likely only to provide the indexed |
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51 | * form, (which requires fewer copy operations and less space). |
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52 | * |
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53 | * The form and interpretation of the link-level address is purely a matter |
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54 | * of convention between the device driver and its consumers; however, it is |
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55 | * expected that all drivers for an interface of a given if_type will agree. |
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56 | */ |
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57 | |
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58 | /* |
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59 | * Structure of a Link-Level sockaddr: |
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60 | */ |
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61 | struct sockaddr_dl { |
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62 | u_char sdl_len; /* Total length of sockaddr */ |
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63 | u_char sdl_family; /* AF_LINK */ |
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64 | u_short sdl_index; /* if != 0, system given index for interface */ |
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65 | u_char sdl_type; /* interface type */ |
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66 | u_char sdl_nlen; /* interface name length, no trailing 0 reqd. */ |
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67 | u_char sdl_alen; /* link level address length */ |
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68 | u_char sdl_slen; /* link layer selector length */ |
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69 | char sdl_data[46]; /* minimum work area, can be larger; |
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70 | contains both if name and ll address */ |
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71 | }; |
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72 | |
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73 | #define LLADDR(s) ((caddr_t)((s)->sdl_data + (s)->sdl_nlen)) |
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74 | |
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75 | #ifndef _KERNEL |
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76 | |
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77 | #include <rtems/bsd/sys/cdefs.h> |
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78 | |
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79 | __BEGIN_DECLS |
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80 | void link_addr(const char *, struct sockaddr_dl *); |
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81 | char *link_ntoa(const struct sockaddr_dl *); |
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82 | __END_DECLS |
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83 | |
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84 | #endif /* !_KERNEL */ |
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85 | |
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86 | #endif |
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