projects / unix-history / blame
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|---|---|---|
| d66f7a18 MK |
1 | /* |
| 2 | * Copyright (c) 1986 Regents of the University of California. | |
| 5b519e94 | 3 | * All rights reserved. |
| d66f7a18 | 4 | * |
| af359dea C |
5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 5b519e94 | 20 | * |
| af359dea C |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 5b519e94 | 32 | * |
| 1c15e888 | 33 | * @(#)if_arp.h 7.4 (Berkeley) 6/28/90 |
| d66f7a18 MK |
34 | */ |
| 35 | ||
| 36 | /* | |
| 37 | * Address Resolution Protocol. | |
| 38 | * | |
| 39 | * See RFC 826 for protocol description. ARP packets are variable | |
| 40 | * in size; the arphdr structure defines the fixed-length portion. | |
| 41 | * Protocol type values are the same as those for 10 Mb/s Ethernet. | |
| 42 | * It is followed by the variable-sized fields ar_sha, arp_spa, | |
| 43 | * arp_tha and arp_tpa in that order, according to the lengths | |
| 44 | * specified. Field names used correspond to RFC 826. | |
| 45 | */ | |
| 46 | struct arphdr { | |
| 47 | u_short ar_hrd; /* format of hardware address */ | |
| 48 | #define ARPHRD_ETHER 1 /* ethernet hardware address */ | |
| 49 | u_short ar_pro; /* format of protocol address */ | |
| 50 | u_char ar_hln; /* length of hardware address */ | |
| 51 | u_char ar_pln; /* length of protocol address */ | |
| 52 | u_short ar_op; /* one of: */ | |
| 53 | #define ARPOP_REQUEST 1 /* request to resolve address */ | |
| 54 | #define ARPOP_REPLY 2 /* response to previous request */ | |
| 55 | /* | |
| 56 | * The remaining fields are variable in size, | |
| 57 | * according to the sizes above. | |
| 58 | */ | |
| 59 | /* u_char ar_sha[]; /* sender hardware address */ | |
| 60 | /* u_char ar_spa[]; /* sender protocol address */ | |
| 61 | /* u_char ar_tha[]; /* target hardware address */ | |
| 62 | /* u_char ar_tpa[]; /* target protocol address */ | |
| 63 | }; | |
| 64 | ||
| 65 | /* | |
| 66 | * ARP ioctl request | |
| 67 | */ | |
| 68 | struct arpreq { | |
| 69 | struct sockaddr arp_pa; /* protocol address */ | |
| 70 | struct sockaddr arp_ha; /* hardware address */ | |
| 71 | int arp_flags; /* flags */ | |
| 72 | }; | |
| 73 | /* arp_flags and at_flags field values */ | |
| 74 | #define ATF_INUSE 0x01 /* entry in use */ | |
| 75 | #define ATF_COM 0x02 /* completed entry (enaddr valid) */ | |
| 76 | #define ATF_PERM 0x04 /* permanent entry */ | |
| 77 | #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ | |
| 78 | #define ATF_USETRAILERS 0x10 /* has requested trailers */ |