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Annotation of 43BSD/sys/vaxif/if_en.h, revision 1.1.1.1

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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