/* $NetBSD: if_ether.h,v 1.25 1997/01/17 17:06:06 mikel 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 * * $FreeBSD: src/lib/libstand/if_ether.h,v 1.1.1.1.6.1 2000/09/20 09:49:17 jkh Exp $ */ #ifndef _STAND_IF_ETHER_H_ #define _STAND_IF_ETHER_H_ /* * Ethernet address - 6 octets * this is only used by the ethers(3) functions. */ struct ether_addr { u_int8_t ether_addr_octet[6]; }; /* * Structure of a 10Mb/s Ethernet header. */ #define ETHER_ADDR_LEN 6 struct ether_header { u_int8_t ether_dhost[ETHER_ADDR_LEN]; u_int8_t ether_shost[ETHER_ADDR_LEN]; u_int16_t ether_type; }; #define ETHERTYPE_PUP 0x0200 /* PUP protocol */ #define ETHERTYPE_IP 0x0800 /* IP protocol */ #define ETHERTYPE_ARP 0x0806 /* address resolution protocol */ #define ETHERTYPE_REVARP 0x8035 /* reverse addr resolution protocol */ /* * The ETHERTYPE_NTRAILER packet types starting at ETHERTYPE_TRAIL have * (type-ETHERTYPE_TRAIL)*512 bytes of data followed * by an ETHER type (as given above) and then the (variable-length) header. */ #define ETHERTYPE_TRAIL 0x1000 /* Trailer packet */ #define ETHERTYPE_NTRAILER 16 #define ETHER_IS_MULTICAST(addr) (*(addr) & 0x01) /* is address mcast/bcast? */ #define ETHERMTU 1500 #define ETHERMIN (60-14) #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]; \ } #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 /* * 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]; /* be nice to m68k ports */ LIST_HEAD(, ether_multi) ac_multiaddrs; /* list of ether multicast addrs */ int ac_multicnt; /* length of ac_multiaddrs list */ }; struct llinfo_arp { LIST_ENTRY(llinfo_arp) la_list; struct rtentry *la_rt; struct mbuf *la_hold; /* last packet until resolved/timeout */ long la_asked; /* last time we QUERIED for this addr */ #define la_timer la_rt->rt_rmx.rmx_expire /* deletion time in seconds */ }; 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 */ #ifdef _KERNEL u_int8_t etherbroadcastaddr[ETHER_ADDR_LEN]; u_int8_t ether_ipmulticast_min[ETHER_ADDR_LEN]; u_int8_t ether_ipmulticast_max[ETHER_ADDR_LEN]; struct ifqueue arpintrq; void arpwhohas(struct arpcom *, struct in_addr *); void arpintr(void); int arpresolve(struct arpcom *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *); void arp_ifinit(struct arpcom *, struct ifaddr *); void arp_rtrequest(int, struct rtentry *, struct sockaddr *); int ether_addmulti(struct ifreq *, struct arpcom *); int ether_delmulti(struct ifreq *, struct arpcom *); #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 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; */ \ { \ for ((enm) = (ac)->ac_multiaddrs.lh_first; \ (enm) != NULL && \ (bcmp((enm)->enm_addrlo, (addrlo), ETHER_ADDR_LEN) != 0 || \ bcmp((enm)->enm_addrhi, (addrhi), ETHER_ADDR_LEN) != 0); \ (enm) = (enm)->enm_list.le_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_list.le_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.lh_first; \ ETHER_NEXT_MULTI((step), (enm)); \ } #ifdef _KERNEL void arp_rtrequest(int, struct rtentry *, struct sockaddr *); int arpresolve(struct arpcom *, struct rtentry *, struct mbuf *, struct sockaddr *, u_char *); void arpintr(void); int arpioctl(u_long, caddr_t); void arp_ifinit(struct arpcom *, struct ifaddr *); 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); #endif /* * Prototype ethers(3) functions. */ #ifndef _KERNEL #include <sys/cdefs.h> __BEGIN_DECLS char * ether_ntoa(struct ether_addr *); struct ether_addr * ether_aton(char *); int ether_ntohost(char *, struct ether_addr *); int ether_hostton(char *, struct ether_addr *); int ether_line(char *, struct ether_addr *, char *); __END_DECLS #endif #endif /* !_STAND_IF_ETHER_H_ */
