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/*
* Mach Operating System
* Copyright (c) 1987 Carnegie-Mellon University
* All rights reserved. The CMU software License Agreement specifies
* the terms and conditions for use and redistribution.
*/
/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* @(#)if_ether.h 7.3 (Berkeley) 6/29/88 plus MULTICAST 1.0
*
* HISTORY
* 11-Jul-93 Mac Gillon (mgillon) at NeXT
* Integrated MULTICAST support
*
* 09-Apr-90 Bradley Taylor (btaylor) at NeXT, Inc.
* Move Ethernet definitions to <net/etherdefs.h>. Leave arp stuff here.
*
* 20-Oct-87 Peter King (king) at NeXT, Inc.
* SUN_RPC: Add definition for ether_addr. Add RARP support.
*
* 25-Jan-86 Avadis Tevanian (avie) at Carnegie-Mellon University
* Upgraded to 4.3.
*
* 15-Aug-85 Mike Accetta (mja) at Carnegie-Mellon University
* CS_INET: added ac_if field to arptab definition to allow
* multiple interfaces to co-exist.
* [V1(1)]
*/
/* @(#)if_ether.h 2.1 88/05/18 4.0NFSSRC SMI; from UCB 7.1 6/5/86 */
#import <net/etherdefs.h>
/*
* Ethernet Address Resolution Protocol.
*
* See RFC 826 for protocol description. Structure below is adapted
* to resolving internet addresses. Field names used correspond to
* RFC 826.
*/
struct ether_arp {
struct arphdr ea_hdr; /* fixed-size header */
u_char arp_sha[6]; /* sender hardware address */
u_char arp_spa[4]; /* sender protocol address */
u_char arp_tha[6]; /* target hardware address */
u_char arp_tpa[4]; /* target protocol address */
};
#define arp_hrd ea_hdr.ar_hrd
#define arp_pro ea_hdr.ar_pro
#define arp_hln ea_hdr.ar_hln
#define arp_pln ea_hdr.ar_pln
#define arp_op ea_hdr.ar_op
/*
* Structure shared between the ethernet driver modules and
* the address resolution code. For example, each ec_softc or il_softc
* begins with this structure.
*/
struct arpcom {
struct ifnet ac_if; /* network-visible interface */
u_char ac_enaddr[6]; /* ethernet hardware address */
struct in_addr ac_ipaddr; /* copy of ip address- XXX */
struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */
};
/*
* Internet to ethernet address resolution table.
*/
struct arptab {
struct in_addr at_iaddr; /* internet address */
u_char at_enaddr[6]; /* ethernet address */
u_char at_timer; /* minutes since last reference */
u_char at_flags; /* flags */
struct mbuf *at_hold; /* one element packet buffering */
struct ifnet *at_if; /* interface (CS_INET) */
};
#ifdef KERNEL
u_char etherbroadcastaddr[6];
struct arptab *arptnew();
char *ether_sprintf();
#endif
/*
* Ethernet multicast address structure. There is one of these for each
* multicast address or range of multicast addresses that we are supposed
* to listen to on a particular interface. They are kept in a linked list,
* rooted in the interface's arpcom structure. (This really has nothing to
* do with ARP, or with the Internet address family, but this appears to be
* the minimally-disrupting place to put it.)
*/
struct ether_multi {
u_char enm_addrlo[6]; /* low or only address of range */
u_char enm_addrhi[6]; /* high or only address of range */
struct arpcom *enm_ac; /* back pointer to arpcom */
u_int enm_refcount; /* no. claims to this addr/range */
struct ether_multi *enm_next; /* ptr to next ether_multi */
};
#ifdef KERNEL
/*
* Structure used by macros below to remember position when stepping through
* all of the ether_multi records.
*/
struct ether_multistep {
struct ether_multi *e_enm;
};
/*
* Macro for looking up the ether_multi record for a given range of Ethernet
* multicast addresses connected to a given arpcom structure. If no matching
* record is found, "enm" returns NULL.
*/
#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
/* u_char addrlo[6]; */ \
/* u_char addrhi[6]; */ \
/* struct arpcom *ac; */ \
/* struct ether_multi *enm; */ \
{ \
for ((enm) = (ac)->ac_multiaddrs; \
(enm) != NULL && \
(bcmp((enm)->enm_addrlo, (addrlo), 6) != 0 || \
bcmp((enm)->enm_addrhi, (addrhi), 6) != 0); \
(enm) = (enm)->enm_next); \
}
/*
* Macro to step through all of the ether_multi records, one at a time.
* The current position is remembered in "step", which the caller must
* provide. ETHER_FIRST_MULTI(), below, must be called to initialize "step"
* and get the first record. Both macros return a NULL "enm" when there
* are no remaining records.
*/
#define ETHER_NEXT_MULTI(step, enm) \
/* struct ether_multistep step; */ \
/* struct ether_multi *enm; */ \
{ \
if (((enm) = (step).e_enm) != NULL) \
(step).e_enm = (enm)->enm_next; \
}
#define ETHER_FIRST_MULTI(step, ac, enm) \
/* struct ether_multistep step; */ \
/* struct arpcom *ac; */ \
/* struct ether_multi *enm; */ \
{ \
(step).e_enm = (ac)->ac_multiaddrs; \
ETHER_NEXT_MULTI((step), (enm)); \
}
#endif
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