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Annotation of 43BSDTahoe/sys/netinet/if_ether.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 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_ether.h  7.3 (Berkeley) 6/29/88
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * Structure of a 10Mb/s Ethernet header.
        !            22:  */
        !            23: struct ether_header {
        !            24:        u_char  ether_dhost[6];
        !            25:        u_char  ether_shost[6];
        !            26:        u_short ether_type;
        !            27: };
        !            28: 
        !            29: #define        ETHERTYPE_PUP   0x0200          /* PUP protocol */
        !            30: #define        ETHERTYPE_IP    0x0800          /* IP protocol */
        !            31: #define ETHERTYPE_ARP  0x0806          /* Addr. resolution protocol */
        !            32: 
        !            33: /*
        !            34:  * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have
        !            35:  * (type-ETHERTYPE_TRAIL)*512 bytes of data followed
        !            36:  * by an ETHER type (as given above) and then the (variable-length) header.
        !            37:  */
        !            38: #define        ETHERTYPE_TRAIL         0x1000          /* Trailer packet */
        !            39: #define        ETHERTYPE_NTRAILER      16
        !            40: 
        !            41: #define        ETHERMTU        1500
        !            42: #define        ETHERMIN        (60-14)
        !            43: 
        !            44: /*
        !            45:  * Ethernet Address Resolution Protocol.
        !            46:  *
        !            47:  * See RFC 826 for protocol description.  Structure below is adapted
        !            48:  * to resolving internet addresses.  Field names used correspond to 
        !            49:  * RFC 826.
        !            50:  */
        !            51: struct ether_arp {
        !            52:        struct  arphdr ea_hdr;  /* fixed-size header */
        !            53:        u_char  arp_sha[6];     /* sender hardware address */
        !            54:        u_char  arp_spa[4];     /* sender protocol address */
        !            55:        u_char  arp_tha[6];     /* target hardware address */
        !            56:        u_char  arp_tpa[4];     /* target protocol address */
        !            57: };
        !            58: #define        arp_hrd ea_hdr.ar_hrd
        !            59: #define        arp_pro ea_hdr.ar_pro
        !            60: #define        arp_hln ea_hdr.ar_hln
        !            61: #define        arp_pln ea_hdr.ar_pln
        !            62: #define        arp_op  ea_hdr.ar_op
        !            63: 
        !            64: 
        !            65: /*
        !            66:  * Structure shared between the ethernet driver modules and
        !            67:  * the address resolution code.  For example, each ec_softc or il_softc
        !            68:  * begins with this structure.
        !            69:  */
        !            70: struct arpcom {
        !            71:        struct  ifnet ac_if;            /* network-visible interface */
        !            72:        u_char  ac_enaddr[6];           /* ethernet hardware address */
        !            73:        struct in_addr ac_ipaddr;       /* copy of ip address- XXX */
        !            74: };
        !            75: 
        !            76: /*
        !            77:  * Internet to ethernet address resolution table.
        !            78:  */
        !            79: struct arptab {
        !            80:        struct  in_addr at_iaddr;       /* internet address */
        !            81:        u_char  at_enaddr[6];           /* ethernet address */
        !            82:        u_char  at_timer;               /* minutes since last reference */
        !            83:        u_char  at_flags;               /* flags */
        !            84:        struct  mbuf *at_hold;          /* last packet until resolved/timeout */
        !            85: };
        !            86: 
        !            87: #ifdef KERNEL
        !            88: u_char etherbroadcastaddr[6];
        !            89: struct arptab *arptnew();
        !            90: char *ether_sprintf();
        !            91: #endif

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