/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)if_ether.h 8.3 (Berkeley) 5/2/95
* $FreeBSD: src/sys/netinet/if_ether.h,v 1.32 2005/02/22 13:04:03 glebius Exp $
*/
/*
* $Id$
*/
#ifndef _NETINET_IF_ETHER_H_
#define _NETINET_IF_ETHER_H_
#include <net/ethernet.h>
#include <net/if_arp.h>
#ifdef _KERNEL
/*
* Macro to map an IP multicast address to an Ethernet multicast address.
* The high-order 25 bits of the Ethernet address are statically assigned,
* and the low-order 23 bits are taken from the low end of the IP address.
*/
#define ETHER_MAP_IP_MULTICAST(ipaddr, enaddr) \
/* struct in_addr *ipaddr; */ \
/* u_char enaddr[ETHER_ADDR_LEN]; */ \
{ \
(enaddr)[0] = 0x01; \
(enaddr)[1] = 0x00; \
(enaddr)[2] = 0x5e; \
(enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \
(enaddr)[4] = ((u_char *)ipaddr)[2]; \
(enaddr)[5] = ((u_char *)ipaddr)[3]; \
}
#endif
/*
* 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[ETHER_ADDR_LEN]; /* sender hardware address */
u_char arp_spa[4]; /* sender protocol address */
u_char arp_tha[ETHER_ADDR_LEN]; /* 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
struct sockaddr_inarp {
u_char sin_len;
u_char sin_family;
u_short sin_port;
struct in_addr sin_addr;
struct in_addr sin_srcaddr;
u_short sin_tos;
u_short sin_other;
#define SIN_PROXY 1
};
/*
* IP and ethernet specific routing flags
*/
#define RTF_USETRAILERS RTF_PROTO1 /* use trailers */
#define RTF_ANNOUNCE RTF_PROTO2 /* announce new arp entry */
#ifdef _KERNEL
extern u_char etherbroadcastaddr[ETHER_ADDR_LEN];
extern u_char ether_ipmulticast_min[ETHER_ADDR_LEN];
extern u_char ether_ipmulticast_max[ETHER_ADDR_LEN];
extern struct ifqueue arpintrq;
int arpresolve(struct arpcom *, struct rtentry *, struct mbuf *,
struct sockaddr *, u_char *, struct rtentry *);
void arp_ifinit(struct arpcom *, struct ifaddr *);
int ether_addmulti(struct ifreq *, struct arpcom *);
int ether_delmulti(struct ifreq *, struct arpcom *);
/*
* 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[ETHER_ADDR_LEN]; /* low or only address of range */
u_char enm_addrhi[ETHER_ADDR_LEN]; /* 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 */
};
/*
* 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[ETHER_ADDR_LEN]; */ \
/* u_char addrhi[ETHER_ADDR_LEN]; */ \
/* struct arpcom *ac; */ \
/* struct ether_multi *enm; */ \
{ \
for ((enm) = (ac)->ac_multiaddrs; \
(enm) != NULL && \
(bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 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
#endif
