Return to if_arp.h CVS log

Up to [CSRG BSD Unix] / 43BSDTahoe / sys / net

Annotation of 43BSDTahoe/sys/net/if_arp.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)if_arp.h    7.3 (Berkeley) 6/27/88
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * Address Resolution Protocol.
        !            22:  *
        !            23:  * See RFC 826 for protocol description.  ARP packets are variable
        !            24:  * in size; the arphdr structure defines the fixed-length portion.
        !            25:  * Protocol type values are the same as those for 10 Mb/s Ethernet.
        !            26:  * It is followed by the variable-sized fields ar_sha, arp_spa,
        !            27:  * arp_tha and arp_tpa in that order, according to the lengths
        !            28:  * specified.  Field names used correspond to RFC 826.
        !            29:  */
        !            30: struct arphdr {
        !            31:        u_short ar_hrd;         /* format of hardware address */
        !            32: #define ARPHRD_ETHER   1       /* ethernet hardware address */
        !            33:        u_short ar_pro;         /* format of protocol address */
        !            34:        u_char  ar_hln;         /* length of hardware address */
        !            35:        u_char  ar_pln;         /* length of protocol address */
        !            36:        u_short ar_op;          /* one of: */
        !            37: #define        ARPOP_REQUEST   1       /* request to resolve address */
        !            38: #define        ARPOP_REPLY     2       /* response to previous request */
        !            39: /*
        !            40:  * The remaining fields are variable in size,
        !            41:  * according to the sizes above.
        !            42:  */
        !            43: /*     u_char  ar_sha[];       /* sender hardware address */
        !            44: /*     u_char  ar_spa[];       /* sender protocol address */
        !            45: /*     u_char  ar_tha[];       /* target hardware address */
        !            46: /*     u_char  ar_tpa[];       /* target protocol address */
        !            47: };
        !            48: 
        !            49: /*
        !            50:  * ARP ioctl request
        !            51:  */
        !            52: struct arpreq {
        !            53:        struct  sockaddr arp_pa;                /* protocol address */
        !            54:        struct  sockaddr arp_ha;                /* hardware address */
        !            55:        int     arp_flags;                      /* flags */
        !            56: };
        !            57: /*  arp_flags and at_flags field values */
        !            58: #define        ATF_INUSE       0x01    /* entry in use */
        !            59: #define ATF_COM                0x02    /* completed entry (enaddr valid) */
        !            60: #define        ATF_PERM        0x04    /* permanent entry */
        !            61: #define        ATF_PUBL        0x08    /* publish entry (respond for other host) */
        !            62: #define        ATF_USETRAILERS 0x10    /* has requested trailers */

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.