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Annotation of cci/sys/netinet/if_ether.h, revision 1.1.1.1

1.1       root        1: /*     if_ether.h      6.2     83/09/26        */
                      2: 
                      3: /* 
                      4:  * Changes
                      5:  *     add return values of arpresolve()
                      6:  */
                      7: /*
                      8:  * Structure of a 10Mb/s Ethernet header.
                      9:  */
                     10: struct ether_header {
                     11:        u_char  ether_dhost[6];
                     12:        u_char  ether_shost[6];
                     13:        u_short ether_type;
                     14: };
                     15: 
                     16: #define        SIZEOF_ETHEADER         14              /* real sizeof(ether_header) */
                     17: #define        ETHERPUP_PUPTYPE        0x0200          /* PUP protocol */
                     18: #define        ETHERPUP_IPTYPE         0x0800          /* IP protocol */
                     19: #define ETHERPUP_ARPTYPE       0x0806          /* Addr. resolution protocol */
                     20: 
                     21: /*
                     22:  * The ETHERPUP_NTRAILER packet types starting at ETHERPUP_TRAIL have
                     23:  * (type-ETHERPUP_TRAIL)*512 bytes of data followed
                     24:  * by a PUP type (as given above) and then the (variable-length) header.
                     25:  */
                     26: #define        ETHERPUP_TRAIL          0x1000          /* Trailer PUP */
                     27: #define        ETHERPUP_NTRAILER       16
                     28: 
                     29: #define        ETHERMTU        1500
                     30: #define        ETHERMIN        (60-14)
                     31: 
                     32: /*
                     33:  * Ethernet Address Resolution Protocol.
                     34:  *
                     35:  * See RFC 826 for protocol description.  Structure below is adapted
                     36:  * to resolving internet addresses.  Field names used correspond to 
                     37:  * RFC 826.
                     38:  */
                     39: struct ether_arp {
                     40:        u_short arp_hrd;        /* format of hardware address */
                     41: #define ARPHRD_ETHER   1       /* ethernet hardware address */
                     42:        u_short arp_pro;        /* format of proto. address (ETHERPUP_IPTYPE) */
                     43:        u_char  arp_hln;        /* length of hardware address (6) */
                     44:        u_char  arp_pln;        /* length of protocol address (4) */
                     45:        u_short arp_op;
                     46: #define        ARPOP_REQUEST   1       /* request to resolve address */
                     47: #define        ARPOP_REPLY     2       /* response to previous request */
                     48:        u_char  arp_sha[6];     /* sender hardware address */
                     49:        u_char  arp_spa[4];     /* sender protocol address */
                     50:        u_char  arp_tha[6];     /* target hardware address */
                     51:        u_char  arp_tpa[4];     /* target protocol address */
                     52: };
                     53: 
                     54: /*
                     55:  * Structure shared between the ethernet driver modules and
                     56:  * the address resolution code.  For example, each ec_softc or il_softc
                     57:  * begins with this structure.
                     58:  */
                     59: struct arpcom {
                     60:        struct  ifnet ac_if;    /* network-visible interface */
                     61:        u_char  ac_enaddr[6];   /* ethernet hardware address */
                     62:        struct  arpcom *ac_ac;  /* link to next ether driver */
                     63: };
                     64: 
                     65: #ifdef KERNEL
                     66: u_char etherbroadcastaddr[6];                  /* 6 bytes of 0xFF */
                     67: struct in_addr arpmyaddr();
                     68: struct arptab *arptnew();
                     69: 
                     70: /* return value of arpresolve() */
                     71: #define        ARPRESOLVE_WILLSEND             0
                     72: #define        ARPRESOLVE_OK                   1
                     73: #define        ARPRESOLVE_BROADCAST            2
                     74: #endif

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