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Annotation of 43BSD/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.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)if_en.h     7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * Structure of a Ethernet header.
        !            11:  */
        !            12: struct en_header {
        !            13:        u_char  en_shost;
        !            14:        u_char  en_dhost;
        !            15:        u_short en_type;
        !            16: };
        !            17: 
        !            18: #define        ENTYPE_PUP      0x0200          /* PUP protocol */
        !            19: #define        ENTYPE_IP       0x0201          /* IP protocol */
        !            20: 
        !            21: /*
        !            22:  * The ENTYPE_NTRAILER packet types starting at
        !            23:  * ENTYPE_TRAIL have (type-ENTYPE_TRAIL)*512 bytes
        !            24:  * of data followed by an Ethernet type (as given above)
        !            25:  * and then the (variable-length) header.
        !            26:  */
        !            27: #define        ENTYPE_TRAIL    0x1000          /* Trailer type */
        !            28: #define        ENTYPE_NTRAILER 16
        !            29: 
        !            30: #define EN_BROADCAST   0               /* Hardware broadcast address */

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