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Annotation of kernel/bsd/net/if_arp.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * Portions Copyright (c) 1999 Apple Computer, Inc.  All Rights
        !             7:  * Reserved.  This file contains Original Code and/or Modifications of
        !             8:  * Original Code as defined in and that are subject to the Apple Public
        !             9:  * Source License Version 1.1 (the "License").  You may not use this file
        !            10:  * except in compliance with the License.  Please obtain a copy of the
        !            11:  * License at http://www.apple.com/publicsource and read it before using
        !            12:  * this file.
        !            13:  * 
        !            14:  * The Original Code and all software distributed under the License are
        !            15:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            16:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            17:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            18:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            19:  * License for the specific language governing rights and limitations
        !            20:  * under the License.
        !            21:  * 
        !            22:  * @APPLE_LICENSE_HEADER_END@
        !            23:  */
        !            24: 
        !            25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
        !            26: /*
        !            27:  * Copyright (c) 1986, 1993
        !            28:  *     The Regents of the University of California.  All rights reserved.
        !            29:  *
        !            30:  * Redistribution and use in source and binary forms, with or without
        !            31:  * modification, are permitted provided that the following conditions
        !            32:  * are met:
        !            33:  * 1. Redistributions of source code must retain the above copyright
        !            34:  *    notice, this list of conditions and the following disclaimer.
        !            35:  * 2. Redistributions in binary form must reproduce the above copyright
        !            36:  *    notice, this list of conditions and the following disclaimer in the
        !            37:  *    documentation and/or other materials provided with the distribution.
        !            38:  * 3. All advertising materials mentioning features or use of this software
        !            39:  *    must display the following acknowledgement:
        !            40:  *     This product includes software developed by the University of
        !            41:  *     California, Berkeley and its contributors.
        !            42:  * 4. Neither the name of the University nor the names of its contributors
        !            43:  *    may be used to endorse or promote products derived from this software
        !            44:  *    without specific prior written permission.
        !            45:  *
        !            46:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            47:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            48:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            49:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            50:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            51:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            52:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            53:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            54:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            55:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            56:  * SUCH DAMAGE.
        !            57:  *
        !            58:  *     @(#)if_arp.h    8.1 (Berkeley) 6/10/93
        !            59:  */
        !            60: 
        !            61: #ifndef _SYS_IF_ARP_H
        !            62: #define _SYS_IF_ARP_H
        !            63: 
        !            64: /*
        !            65:  * Address Resolution Protocol.
        !            66:  *
        !            67:  * See RFC 826 for protocol description.  ARP packets are variable
        !            68:  * in size; the arphdr structure defines the fixed-length portion.
        !            69:  * Protocol type values are the same as those for 10 Mb/s Ethernet.
        !            70:  * It is followed by the variable-sized fields ar_sha, arp_spa,
        !            71:  * arp_tha and arp_tpa in that order, according to the lengths
        !            72:  * specified.  Field names used correspond to RFC 826.
        !            73:  */
        !            74: struct arphdr {
        !            75:        u_int16_t ar_hrd;       /* format of hardware address */
        !            76: #define ARPHRD_ETHER   1       /* ethernet hardware format */
        !            77: #define ARPHRD_FRELAY  15      /* frame relay hardware format */
        !            78:        u_int16_t ar_pro;       /* format of protocol address */
        !            79:        u_int8_t  ar_hln;       /* length of hardware address */
        !            80:        u_int8_t  ar_pln;       /* length of protocol address */
        !            81:        u_int16_t ar_op;        /* one of: */
        !            82: #define        ARPOP_REQUEST   1       /* request to resolve address */
        !            83: #define        ARPOP_REPLY     2       /* response to previous request */
        !            84: #define        ARPOP_REVREQUEST 3      /* request protocol address given hardware */
        !            85: #define        ARPOP_REVREPLY  4       /* response giving protocol address */
        !            86: #define        ARPOP_INVREQUEST 8      /* request to identify peer */
        !            87: #define        ARPOP_INVREPLY  9       /* response identifying peer */
        !            88: /*
        !            89:  * The remaining fields are variable in size,
        !            90:  * according to the sizes above.
        !            91:  */
        !            92: #ifdef COMMENT_ONLY
        !            93:        u_int8_t  ar_sha[];     /* sender hardware address */
        !            94:        u_int8_t  ar_spa[];     /* sender protocol address */
        !            95:        u_int8_t  ar_tha[];     /* target hardware address */
        !            96:        u_int8_t  ar_tpa[];     /* target protocol address */
        !            97: #endif
        !            98: };
        !            99: 
        !           100: /*
        !           101:  * ARP ioctl request
        !           102:  */
        !           103: struct arpreq {
        !           104:        struct  sockaddr arp_pa;                /* protocol address */
        !           105:        struct  sockaddr arp_ha;                /* hardware address */
        !           106:        int     arp_flags;                      /* flags */
        !           107: };
        !           108: /*  arp_flags and at_flags field values */
        !           109: #define        ATF_INUSE       0x01    /* entry in use */
        !           110: #define ATF_COM                0x02    /* completed entry (enaddr valid) */
        !           111: #define        ATF_PERM        0x04    /* permanent entry */
        !           112: #define        ATF_PUBL        0x08    /* publish entry (respond for other host) */
        !           113: #define        ATF_USETRAILERS 0x10    /* has requested trailers */
        !           114: 
        !           115: #endif _SYS_IF_ARP_H

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