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- /* $OpenBSD: if_ether.h,v 1.57 2015/06/23 13:20:17 mpi Exp $ */
- /* $NetBSD: if_ether.h,v 1.22 1996/05/11 13:00:00 mycroft 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 _NETINET_IF_ETHER_H_
- #define _NETINET_IF_ETHER_H_
- /*
- * Some basic Ethernet constants.
- */
- #define ETHER_ADDR_LEN 6 /* Ethernet address length */
- #define ETHER_TYPE_LEN 2 /* Ethernet type field length */
- #define ETHER_CRC_LEN 4 /* Ethernet CRC length */
- #define ETHER_HDR_LEN ((ETHER_ADDR_LEN * 2) + ETHER_TYPE_LEN)
- #define ETHER_MIN_LEN 64 /* Minimum frame length, CRC included */
- #define ETHER_MAX_LEN 1518 /* Maximum frame length, CRC included */
- #define ETHER_MAX_DIX_LEN 1536 /* Maximum DIX frame length */
- /*
- * Some Ethernet extensions.
- */
- #define ETHER_VLAN_ENCAP_LEN 4 /* len of 802.1Q VLAN encapsulation */
- /*
- * Mbuf adjust factor to force 32-bit alignment of IP header.
- * Drivers should do m_adj(m, ETHER_ALIGN) when setting up a
- * receive so the upper layers get the IP header properly aligned
- * past the 14-byte Ethernet header.
- */
- #define ETHER_ALIGN 2 /* driver adjust for IP hdr alignment */
- /*
- * Ethernet address - 6 octets
- */
- struct ether_addr {
- u_int8_t ether_addr_octet[ETHER_ADDR_LEN];
- };
- /*
- * The length of the combined 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;
- };
- #include <net/ethertypes.h>
- #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */
- #define ETHERMTU (ETHER_MAX_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
- #define ETHERMIN (ETHER_MIN_LEN - ETHER_HDR_LEN - ETHER_CRC_LEN)
- /*
- * Ethernet CRC32 polynomials (big- and little-endian verions).
- */
- #define ETHER_CRC_POLY_LE 0xedb88320
- #define ETHER_CRC_POLY_BE 0x04c11db6
- #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]; */ \
- do { \
- (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]; \
- } while (/* CONSTCOND */ 0)
- /*
- * Macro to map an IPv6 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 IPv6 address.
- */
- #define ETHER_MAP_IPV6_MULTICAST(ip6addr, enaddr) \
- /* struct in6_addr *ip6addr; */ \
- /* u_int8_t enaddr[ETHER_ADDR_LEN]; */ \
- do { \
- (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]; \
- } while (/* CONSTCOND */ 0)
- void ether_fakeaddr(struct ifnet *);
- #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_int8_t arp_sha[ETHER_ADDR_LEN]; /* sender hardware address */
- u_int8_t arp_spa[4]; /* sender protocol address */
- u_int8_t arp_tha[ETHER_ADDR_LEN]; /* target hardware address */
- u_int8_t 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
- #ifdef _KERNEL
- #include <net/if_var.h> /* for "struct ifnet" */
- /*
- * 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_int8_t ac_enaddr[ETHER_ADDR_LEN]; /* ethernet hardware address */
- char ac__pad[2]; /* pad for some machines */
- LIST_HEAD(, ether_multi) ac_multiaddrs; /* list of multicast addrs */
- int ac_multicnt; /* length of ac_multiaddrs */
- int ac_multirangecnt; /* number of mcast ranges */
- };
- #endif
- struct sockaddr_inarp {
- u_int8_t sin_len;
- u_int8_t sin_family;
- u_int16_t sin_port;
- struct in_addr sin_addr;
- struct in_addr sin_srcaddr;
- u_int16_t sin_tos;
- u_int16_t 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 */
- #define RTF_PERMANENT_ARP RTF_PROTO3 /* only manual overwrite of entry */
- #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];
- extern struct niqueue arpintrq;
- void arpwhohas(struct arpcom *, struct in_addr *);
- void arpintr(void);
- int arpresolve(struct ifnet *,
- struct rtentry *, struct mbuf *, struct sockaddr *, u_char *);
- void arp_ifinit(struct arpcom *, struct ifaddr *);
- void arp_rtrequest(int, struct rtentry *);
- int ether_addmulti(struct ifreq *, struct arpcom *);
- int ether_delmulti(struct ifreq *, struct arpcom *);
- int ether_multiaddr(struct sockaddr *, u_int8_t[], u_int8_t[]);
- /*
- * 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_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 arpcom *enm_ac; /* back pointer to arpcom */
- 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 arpcom structure. If no matching
- * record is found, "enm" returns NULL.
- */
- #define ETHER_LOOKUP_MULTI(addrlo, addrhi, ac, enm) \
- /* u_int8_t addrlo[ETHER_ADDR_LEN]; */ \
- /* u_int8_t addrhi[ETHER_ADDR_LEN]; */ \
- /* struct arpcom *ac; */ \
- /* struct ether_multi *enm; */ \
- do { \
- for ((enm) = LIST_FIRST(&(ac)->ac_multiaddrs); \
- (enm) != NULL && \
- (memcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 ||\
- memcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \
- (enm) = LIST_NEXT((enm), enm_list)); \
- } while (/* CONSTCOND */ 0)
- /*
- * 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; */ \
- do { \
- if (((enm) = (step).e_enm) != NULL) \
- (step).e_enm = LIST_NEXT((enm), enm_list); \
- } while (/* CONSTCOND */ 0)
- #define ETHER_FIRST_MULTI(step, ac, enm) \
- /* struct ether_multistep step; */ \
- /* struct arpcom *ac; */ \
- /* struct ether_multi *enm; */ \
- do { \
- (step).e_enm = LIST_FIRST(&(ac)->ac_multiaddrs); \
- ETHER_NEXT_MULTI((step), (enm)); \
- } while (/* CONSTCOND */ 0)
- #ifdef NFSCLIENT
- extern struct ifnet *revarp_ifp;
- #endif /* NFSCLIENT */
- void arprequest(struct ifnet *, u_int32_t *, u_int32_t *, u_int8_t *);
- int arpproxy(struct in_addr, u_int);
- void revarpinput(struct mbuf *);
- void in_revarpinput(struct mbuf *);
- void revarprequest(struct ifnet *);
- int revarpwhoarewe(struct ifnet *, struct in_addr *, struct in_addr *);
- int revarpwhoami(struct in_addr *, struct ifnet *);
- int db_show_arptab(void);
- u_int32_t ether_crc32_le_update(u_int32_t crc, const u_int8_t *, size_t);
- u_int32_t ether_crc32_be_update(u_int32_t crc, const u_int8_t *, size_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
- __BEGIN_DECLS
- char *ether_ntoa(struct ether_addr *);
- struct ether_addr *ether_aton(const char *);
- int ether_ntohost(char *, struct ether_addr *);
- int ether_hostton(const char *, struct ether_addr *);
- int ether_line(const char *, struct ether_addr *, char *);
- __END_DECLS
- #endif /* _KERNEL */
- #endif /* _NETINET_IF_ETHER_H_ */
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