219 lines
7.6 KiB
C
219 lines
7.6 KiB
C
/* $NetBSD: if_ether.h,v 1.43 2006/11/24 01:04:30 rpaulo 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. 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_
|
|
|
|
#include <sys/types.h>
|
|
|
|
#ifdef _KERNEL
|
|
#ifdef _KERNEL_OPT
|
|
#include "opt_mbuftrace.h"
|
|
#endif
|
|
#include <sys/mbuf.h>
|
|
#endif
|
|
|
|
/*
|
|
* 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 */
|
|
#define M_PROMISC M_LINK1 /* this packet is not for us */
|
|
|
|
#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
|
|
|
|
#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 const uint8_t etherbroadcastaddr[ETHER_ADDR_LEN];
|
|
extern const uint8_t ethermulticastaddr_slowprotocols[ETHER_ADDR_LEN];
|
|
extern const uint8_t ether_ipmulticast_min[ETHER_ADDR_LEN];
|
|
extern const uint8_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[]);
|
|
|
|
/*
|
|
* Ethernet 802.1Q VLAN structures.
|
|
*/
|
|
|
|
/* add VLAN tag to input/received packet */
|
|
#define VLAN_INPUT_TAG(ifp, m, vlanid, _errcase) \
|
|
do { \
|
|
struct m_tag *mtag = \
|
|
m_tag_get(PACKET_TAG_VLAN, sizeof(u_int), M_NOWAIT);\
|
|
if (mtag == NULL) { \
|
|
ifp->if_ierrors++; \
|
|
printf("%s: unable to allocate VLAN tag\n", \
|
|
ifp->if_xname); \
|
|
m_freem(m); \
|
|
_errcase; \
|
|
} \
|
|
*(u_int *)(mtag + 1) = vlanid; \
|
|
m_tag_prepend(m, mtag); \
|
|
} while(0)
|
|
|
|
/* extract VLAN tag from output/trasmit packet */
|
|
#define VLAN_OUTPUT_TAG(ec, m0) \
|
|
VLAN_ATTACHED(ec) ? m_tag_find((m0), PACKET_TAG_VLAN, NULL) : NULL
|
|
|
|
/* extract VLAN ID value from a VLAN tag */
|
|
#define VLAN_TAG_VALUE(mtag) \
|
|
((*(u_int *)(mtag + 1)) & 4095)
|
|
|
|
/* test if any VLAN is configured for this interface */
|
|
#define VLAN_ATTACHED(ec) ((ec)->ec_nvlans > 0)
|
|
|
|
void ether_ifattach(struct ifnet *, const u_int8_t *);
|
|
void ether_ifdetach(struct ifnet *);
|
|
|
|
char *ether_sprintf(const u_int8_t *);
|
|
char *ether_snprintf(char *, size_t, 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);
|
|
|
|
int ether_nonstatic_aton(u_char *, char *);
|
|
#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_ */
|