265 lines
9.2 KiB
C
265 lines
9.2 KiB
C
/* $NetBSD: if_ether.h,v 1.28 2002/09/16 19:25:30 tron Exp $ */
|
|
|
|
/*
|
|
* 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 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 8.1 (Berkeley) 6/10/93
|
|
*/
|
|
|
|
#ifndef _NET_IF_ETHER_H_
|
|
#define _NET_IF_ETHER_H_
|
|
|
|
/*
|
|
* Some basic Ethernet constants.
|
|
*/
|
|
#define ETHER_ADDR_LEN 6 /* length of an Ethernet address */
|
|
#define ETHER_TYPE_LEN 2 /* length of the Ethernet type field */
|
|
#define ETHER_CRC_LEN 4 /* length of the Ethernet CRC */
|
|
#define ETHER_HDR_LEN ((ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN)
|
|
#define ETHER_MIN_LEN 64 /* minimum frame length, including CRC */
|
|
#define ETHER_MAX_LEN 1518 /* maximum frame length, including CRC */
|
|
#define ETHER_MAX_LEN_JUMBO 9018 /* maximum jumbo frame len, including CRC */
|
|
|
|
/*
|
|
* Some Ethernet extensions.
|
|
*/
|
|
#define ETHER_VLAN_ENCAP_LEN 4 /* length of 802.1Q VLAN encapsulation */
|
|
|
|
/*
|
|
* Ethernet address - 6 octets
|
|
* this is only used by the ethers(3) functions.
|
|
*/
|
|
struct ether_addr {
|
|
u_int8_t ether_addr_octet[ETHER_ADDR_LEN];
|
|
} __attribute__((__packed__));
|
|
|
|
/*
|
|
* Structure of a 10Mb/s Ethernet header.
|
|
*/
|
|
struct ether_header {
|
|
u_int8_t ether_dhost[ETHER_ADDR_LEN];
|
|
u_int8_t ether_shost[ETHER_ADDR_LEN];
|
|
u_int16_t ether_type;
|
|
} __attribute__((__packed__));
|
|
|
|
#include <net/ethertypes.h>
|
|
|
|
#define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
|
|
|
|
#define ETHERMTU_JUMBO (ETHER_MAX_LEN_JUMBO - ETHER_HDR_LEN - ETHER_CRC_LEN)
|
|
#define ETHERMTU (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
|
|
#define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
|
|
|
|
/*
|
|
* Compute the maximum frame size based on ethertype (i.e. possible
|
|
* encapsulation) and whether or not an FCS is present.
|
|
*/
|
|
#define ETHER_MAX_FRAME(ifp, etype, hasfcs) \
|
|
((ifp)->if_mtu + ETHER_HDR_LEN + \
|
|
((hasfcs) ? ETHER_CRC_LEN : 0) + \
|
|
(((etype) == ETHERTYPE_VLAN) ? ETHER_VLAN_ENCAP_LEN : 0))
|
|
|
|
/*
|
|
* Ethernet CRC32 polynomials (big- and little-endian verions).
|
|
*/
|
|
#define ETHER_CRC_POLY_LE 0xedb88320
|
|
#define ETHER_CRC_POLY_BE 0x04c11db6
|
|
|
|
#ifndef _STANDALONE
|
|
|
|
/*
|
|
* Ethernet-specific mbuf flags.
|
|
*/
|
|
#define M_HASFCS M_LINK0 /* FCS included at end of frame */
|
|
|
|
#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_int8_t enaddr[ETHER_ADDR_LEN]; */ \
|
|
{ \
|
|
(enaddr)[0] = 0x01; \
|
|
(enaddr)[1] = 0x00; \
|
|
(enaddr)[2] = 0x5e; \
|
|
(enaddr)[3] = ((u_int8_t *)ipaddr)[1] & 0x7f; \
|
|
(enaddr)[4] = ((u_int8_t *)ipaddr)[2]; \
|
|
(enaddr)[5] = ((u_int8_t *)ipaddr)[3]; \
|
|
}
|
|
/*
|
|
* Macro to map an IP6 multicast address to an Ethernet multicast address.
|
|
* The high-order 16 bits of the Ethernet address are statically assigned,
|
|
* and the low-order 32 bits are taken from the low end of the IP6 address.
|
|
*/
|
|
#define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
|
|
/* struct in6_addr *ip6addr; */ \
|
|
/* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \
|
|
{ \
|
|
(enaddr)[0] = 0x33; \
|
|
(enaddr)[1] = 0x33; \
|
|
(enaddr)[2] = ((u_int8_t *)ip6addr)[12]; \
|
|
(enaddr)[3] = ((u_int8_t *)ip6addr)[13]; \
|
|
(enaddr)[4] = ((u_int8_t *)ip6addr)[14]; \
|
|
(enaddr)[5] = ((u_int8_t *)ip6addr)[15]; \
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Structure shared between the ethernet driver modules and
|
|
* the multicast list code. For example, each ec_softc or il_softc
|
|
* begins with this structure.
|
|
*/
|
|
struct ethercom {
|
|
struct ifnet ec_if; /* network-visible interface */
|
|
LIST_HEAD(, ether_multi) ec_multiaddrs; /* list of ether multicast
|
|
addrs */
|
|
int ec_multicnt; /* length of ec_multiaddrs
|
|
list */
|
|
int ec_capabilities; /* capabilities, provided by
|
|
driver */
|
|
int ec_capenable; /* tells hardware which
|
|
capabilities to enable */
|
|
|
|
int ec_nvlans; /* # VLANs on this interface */
|
|
};
|
|
|
|
#define ETHERCAP_VLAN_MTU 0x00000001 /* VLAN-compatible MTU */
|
|
#define ETHERCAP_VLAN_HWTAGGING 0x00000002 /* hardware VLAN tag support */
|
|
#define ETHERCAP_JUMBO_MTU 0x00000004 /* 9000 byte MTU supported */
|
|
|
|
#ifdef _KERNEL
|
|
extern u_int8_t etherbroadcastaddr[ETHER_ADDR_LEN];
|
|
extern u_int8_t ether_ipmulticast_min[ETHER_ADDR_LEN];
|
|
extern u_int8_t ether_ipmulticast_max[ETHER_ADDR_LEN];
|
|
|
|
int ether_ioctl(struct ifnet *, u_long, caddr_t);
|
|
int ether_addmulti (struct ifreq *, struct ethercom *);
|
|
int ether_delmulti (struct ifreq *, struct ethercom *);
|
|
int ether_changeaddr (struct ifreq *, struct ethercom *);
|
|
int ether_multiaddr(struct sockaddr *, u_int8_t[], u_int8_t[]);
|
|
#endif /* _KERNEL */
|
|
|
|
/*
|
|
* 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 ethercom structure.
|
|
*/
|
|
struct ether_multi {
|
|
u_int8_t enm_addrlo[ETHER_ADDR_LEN]; /* low or only address of range */
|
|
u_int8_t enm_addrhi[ETHER_ADDR_LEN]; /* high or only address of range */
|
|
struct ethercom *enm_ec; /* back pointer to ethercom */
|
|
u_int enm_refcount; /* no. claims to this addr/range */
|
|
LIST_ENTRY(ether_multi) enm_list;
|
|
};
|
|
|
|
/*
|
|
* 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 ethercom structure. If no matching
|
|
* record is found, "enm" returns NULL.
|
|
*/
|
|
#define ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm) \
|
|
/* u_int8_t addrlo[ETHER_ADDR_LEN]; */ \
|
|
/* u_int8_t addrhi[ETHER_ADDR_LEN]; */ \
|
|
/* struct ethercom *ec; */ \
|
|
/* struct ether_multi *enm; */ \
|
|
{ \
|
|
for ((enm) = LIST_FIRST(&(ec)->ec_multiaddrs); \
|
|
(enm) != NULL && \
|
|
(bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \
|
|
bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
|
|
(enm) = LIST_NEXT((enm), enm_list)); \
|
|
}
|
|
|
|
/*
|
|
* 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 = LIST_NEXT((enm), enm_list); \
|
|
}
|
|
|
|
#define ETHER_FIRST_MULTI(step, ec, enm) \
|
|
/* struct ether_multistep step; */ \
|
|
/* struct ethercom *ec; */ \
|
|
/* struct ether_multi *enm; */ \
|
|
{ \
|
|
(step).e_enm = LIST_FIRST(&(ec)->ec_multiaddrs); \
|
|
ETHER_NEXT_MULTI((step), (enm)); \
|
|
}
|
|
|
|
#ifdef _KERNEL
|
|
void ether_ifattach(struct ifnet *, const u_int8_t *);
|
|
void ether_ifdetach(struct ifnet *);
|
|
|
|
char *ether_sprintf(const u_int8_t *);
|
|
|
|
u_int32_t ether_crc32_le(const u_int8_t *, size_t);
|
|
u_int32_t ether_crc32_be(const u_int8_t *, size_t);
|
|
|
|
#else
|
|
/*
|
|
* Prototype ethers(3) functions.
|
|
*/
|
|
#include <sys/cdefs.h>
|
|
__BEGIN_DECLS
|
|
char * ether_ntoa __P((const struct ether_addr *));
|
|
struct ether_addr *
|
|
ether_aton __P((const char *));
|
|
int ether_ntohost __P((char *, const struct ether_addr *));
|
|
int ether_hostton __P((const char *, struct ether_addr *));
|
|
int ether_line __P((const char *, struct ether_addr *, char *));
|
|
__END_DECLS
|
|
#endif
|
|
|
|
#endif /* _STANDALONE */
|
|
|
|
#endif /* _NET_IF_ETHER_H_ */
|