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      1 /*
      2  * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
      3  * Use is subject to license terms.
      4  */
      5 
      6 /*
      7  * Copyright (c) 1982, 1986 Regents of the University of California.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms are permitted
     11  * provided that this notice is preserved and that due credit is given
     12  * to the University of California at Berkeley. The name of the University
     13  * may not be used to endorse or promote products derived from this
     14  * software without specific prior written permission. This software
     15  * is provided ``as is'' without express or implied warranty.
     16  */
     17 
     18 #ifndef	_NETINET_IF_ETHER_H
     19 #define	_NETINET_IF_ETHER_H
     20 
     21 #pragma ident	"@(#)if_ether.h	1.15	05/06/12 SMI"
     22 /* if_ether.h 1.28 89/08/04 SMI; from UCB 7.2 12/7/87 */
     23 
     24 #include <sys/ethernet.h>
     25 
     26 /*
     27  * The following include is for compatibility with SunOS 3.x and
     28  * 4.3bsd.  Newly written programs should include it separately.
     29  */
     30 #include <net/if_arp.h>
     31 
     32 #ifdef	__cplusplus
     33 extern "C" {
     34 #endif
     35 
     36 /*
     37  * Ethernet Address Resolution Protocol.
     38  *
     39  * See RFC 826 for protocol description.  Structure below is adapted
     40  * to resolving internet addresses.  Field names used correspond to
     41  * RFC 826.
     42  */
     43 struct	ether_arp {
     44 	struct	arphdr ea_hdr;		/* fixed-size header */
     45 	ether_addr_t arp_sha;		/* sender hardware address */
     46 	uchar_t	arp_spa[4];		/* sender protocol address */
     47 	ether_addr_t arp_tha;		/* target hardware address */
     48 	uchar_t	arp_tpa[4];		/* target protocol address */
     49 };
     50 #define	arp_hrd	ea_hdr.ar_hrd
     51 #define	arp_pro	ea_hdr.ar_pro
     52 #define	arp_hln	ea_hdr.ar_hln
     53 #define	arp_pln	ea_hdr.ar_pln
     54 #define	arp_op	ea_hdr.ar_op
     55 
     56 /*
     57  *	multicast address structure
     58  *
     59  *	Keep a reference count for each multicast address so
     60  *	addresses loaded into chip are unique.
     61  */
     62 struct	mcaddr {
     63 	struct	ether_addr	mc_enaddr;	/* multicast address */
     64 	ushort_t mc_count;			/* reference count */
     65 };
     66 #define	MCADDRMAX	64		/* multicast addr table length */
     67 #define	MCCOUNTMAX	4096		/* multicast addr max reference count */
     68 
     69 /*
     70  * Structure shared between the ethernet driver modules and
     71  * the address resolution code.  For example, each ec_softc or il_softc
     72  * begins with this structure.
     73  *
     74  * The structure contains a pointer to an array of multicast addresses.
     75  * This pointer is NULL until the first successful SIOCADDMULTI ioctl
     76  * is issued for the interface.
     77  */
     78 struct	arpcom {
     79 	struct	ifnet ac_if;		/* network-visible interface */
     80 	struct	ether_addr ac_enaddr;	/* ethernet hardware address */
     81 	struct	in_addr ac_ipaddr;	/* copy of ip address- XXX */
     82 	struct	mcaddr *ac_mcaddr;	/* table of multicast addrs */
     83 	ushort_t ac_nmcaddr;		/* count of M/C addrs in use */
     84 	struct  in_addr ac_lastip;	/* cache of last ARP lookup */
     85 	struct	ether_addr ac_lastarp;	/* result of the last ARP */
     86 };
     87 
     88 /*
     89  * Internet to ethernet address resolution table.
     90  */
     91 struct	arptab {
     92 	struct	in_addr at_iaddr;	/* internet address */
     93 	union {
     94 	    struct ether_addr atu_enaddr;	/* ethernet address */
     95 	    long   atu_tvsec;			/* timestamp if incomplete */
     96 	} 	at_union;
     97 	uchar_t	at_timer;		/* minutes since last reference */
     98 	uchar_t	at_flags;		/* flags */
     99 	struct	mbuf *at_hold;		/* last packet until resolved/timeout */
    100 };
    101 
    102 #define	at_enaddr	at_union.atu_enaddr
    103 #define	at_tvsec	at_union.atu_tvsec
    104 
    105 /*
    106  * Copy IP addresses from a to b - assumes that the two given
    107  * pointers can be referenced as shorts.  On architectures
    108  * where this is not the case, use bcopy instead.
    109  */
    110 #if defined(__sparc) || defined(__i386) || defined(__amd64)
    111 #define	ip_copy(a, b) { ((short *)b)[0] = ((short *)a)[0]; \
    112 	((short *)b)[1] = ((short *)a)[1]; }
    113 #else
    114 #define	ip_copy(a, b) (bcopy((caddr_t)a, (caddr_t)b, 4))
    115 #endif
    116 
    117 #ifdef	__cplusplus
    118 }
    119 #endif
    120 
    121 #endif	/* _NETINET_IF_ETHER_H */
    122