Annotation of 43BSDReno/sys/vaxif/if_en.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             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.
        !            19:  *
        !            20:  *     @(#)if_en.h     7.3 (Berkeley) 6/28/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * Structure of a Ethernet header.
        !            25:  */
        !            26: struct en_header {
        !            27:        u_char  en_shost;
        !            28:        u_char  en_dhost;
        !            29:        u_short en_type;
        !            30: };
        !            31: 
        !            32: #define        ENTYPE_PUP      0x0200          /* PUP protocol */
        !            33: #define        ENTYPE_IP       0x0201          /* IP protocol */
        !            34: 
        !            35: /*
        !            36:  * The ENTYPE_NTRAILER packet types starting at
        !            37:  * ENTYPE_TRAIL have (type-ENTYPE_TRAIL)*512 bytes
        !            38:  * of data followed by an Ethernet type (as given above)
        !            39:  * and then the (variable-length) header.
        !            40:  */
        !            41: #define        ENTYPE_TRAIL    0x1000          /* Trailer type */
        !            42: #define        ENTYPE_NTRAILER 16
        !            43: 
        !            44: #define EN_BROADCAST   0               /* Hardware broadcast address */

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