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Diffstat (limited to 'lib/libstand/if_ether.h')
| -rw-r--r-- | lib/libstand/if_ether.h | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/lib/libstand/if_ether.h b/lib/libstand/if_ether.h new file mode 100644 index 0000000..a9bc891 --- /dev/null +++ b/lib/libstand/if_ether.h @@ -0,0 +1,263 @@ +/* $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. 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 + */ + +/* + * 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 |
