projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d66f7a18 MK |
1 | /* |
| 2 | * Copyright (c) 1986 Regents of the University of California. | |
| 5b519e94 | 3 | * All rights reserved. |
| d66f7a18 | 4 | * |
| 1c15e888 C |
5 | * Redistribution is only permitted until one year after the first shipment |
| 6 | * of 4.4BSD by the Regents. Otherwise, redistribution and use in source and | |
| 7 | * binary forms are permitted provided that: (1) source distributions retain | |
| 8 | * this entire copyright notice and comment, and (2) distributions including | |
| 9 | * binaries display the following acknowledgement: This product includes | |
| 10 | * software developed by the University of California, Berkeley and its | |
| 11 | * contributors'' in the documentation or other materials provided with the | |
| 12 | * distribution and in all advertising materials mentioning features or use | |
| 13 | * of this software. Neither the name of the University nor the names of | |
| 14 | * its contributors may be used to endorse or promote products derived from | |
| 15 | * this software without specific prior written permission. | |
| 16 | * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED | |
| 17 | * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF | |
| 18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 5b519e94 | 19 | * |
| 1c15e888 | 20 | * @(#)if_arp.h 7.4 (Berkeley) 6/28/90 |
| d66f7a18 MK |
21 | */ |
| 22 | ||
| 23 | /* | |
| 24 | * Address Resolution Protocol. | |
| 25 | * | |
| 26 | * See RFC 826 for protocol description. ARP packets are variable | |
| 27 | * in size; the arphdr structure defines the fixed-length portion. | |
| 28 | * Protocol type values are the same as those for 10 Mb/s Ethernet. | |
| 29 | * It is followed by the variable-sized fields ar_sha, arp_spa, | |
| 30 | * arp_tha and arp_tpa in that order, according to the lengths | |
| 31 | * specified. Field names used correspond to RFC 826. | |
| 32 | */ | |
| 33 | struct arphdr { | |
| 34 | u_short ar_hrd; /* format of hardware address */ | |
| 35 | #define ARPHRD_ETHER 1 /* ethernet hardware address */ | |
| 36 | u_short ar_pro; /* format of protocol address */ | |
| 37 | u_char ar_hln; /* length of hardware address */ | |
| 38 | u_char ar_pln; /* length of protocol address */ | |
| 39 | u_short ar_op; /* one of: */ | |
| 40 | #define ARPOP_REQUEST 1 /* request to resolve address */ | |
| 41 | #define ARPOP_REPLY 2 /* response to previous request */ | |
| 42 | /* | |
| 43 | * The remaining fields are variable in size, | |
| 44 | * according to the sizes above. | |
| 45 | */ | |
| 46 | /* u_char ar_sha[]; /* sender hardware address */ | |
| 47 | /* u_char ar_spa[]; /* sender protocol address */ | |
| 48 | /* u_char ar_tha[]; /* target hardware address */ | |
| 49 | /* u_char ar_tpa[]; /* target protocol address */ | |
| 50 | }; | |
| 51 | ||
| 52 | /* | |
| 53 | * ARP ioctl request | |
| 54 | */ | |
| 55 | struct arpreq { | |
| 56 | struct sockaddr arp_pa; /* protocol address */ | |
| 57 | struct sockaddr arp_ha; /* hardware address */ | |
| 58 | int arp_flags; /* flags */ | |
| 59 | }; | |
| 60 | /* arp_flags and at_flags field values */ | |
| 61 | #define ATF_INUSE 0x01 /* entry in use */ | |
| 62 | #define ATF_COM 0x02 /* completed entry (enaddr valid) */ | |
| 63 | #define ATF_PERM 0x04 /* permanent entry */ | |
| 64 | #define ATF_PUBL 0x08 /* publish entry (respond for other host) */ | |
| 65 | #define ATF_USETRAILERS 0x10 /* has requested trailers */ |