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Diffstat (limited to 'sys/netinet/if_ether.h')
| -rw-r--r-- | sys/netinet/if_ether.h | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/sys/netinet/if_ether.h b/sys/netinet/if_ether.h new file mode 100644 index 0000000..6b4def0 --- /dev/null +++ b/sys/netinet/if_ether.h @@ -0,0 +1,224 @@ +/* + * 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 + */ + +/* + * Structure of a 10Mb/s Ethernet header. + */ +struct ether_header { + u_char ether_dhost[6]; + u_char ether_shost[6]; + u_short ether_type; +}; + +#define ETHERTYPE_PUP 0x0200 /* PUP protocol */ +#define ETHERTYPE_IP 0x0800 /* IP protocol */ +#define ETHERTYPE_ARP 0x0806 /* Addr. 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 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_char enaddr[6]; */ \ +{ \ + (enaddr)[0] = 0x01; \ + (enaddr)[1] = 0x00; \ + (enaddr)[2] = 0x5e; \ + (enaddr)[3] = ((u_char *)ipaddr)[1] & 0x7f; \ + (enaddr)[4] = ((u_char *)ipaddr)[2]; \ + (enaddr)[5] = ((u_char *)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_char arp_sha[6]; /* sender hardware address */ + u_char arp_spa[4]; /* sender protocol address */ + u_char arp_tha[6]; /* target hardware address */ + u_char 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_char ac_enaddr[6]; /* ethernet hardware address */ + struct in_addr ac_ipaddr; /* copy of ip address- XXX */ + struct ether_multi *ac_multiaddrs; /* list of ether multicast addrs */ + int ac_multicnt; /* length of ac_multiaddrs list */ +}; + +struct llinfo_arp { + struct llinfo_arp *la_next; + struct llinfo_arp *la_prev; + 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_char sin_len; + u_char sin_family; + u_short sin_port; + struct in_addr sin_addr; + struct in_addr sin_srcaddr; + u_short sin_tos; + u_short 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_char etherbroadcastaddr[6]; +u_char ether_ipmulticast_min[6]; +u_char ether_ipmulticast_max[6]; +struct ifqueue arpintrq; + +struct llinfo_arp *arptnew __P((struct in_addr *)); +struct llinfo_arp llinfo_arp; /* head of the llinfo queue */ + +void arpwhohas __P((struct arpcom *, struct in_addr *)); +void arpintr __P((void)); +int arpresolve __P((struct arpcom *, + struct rtentry *, struct mbuf *, struct sockaddr *, u_char *)); +void arp_rtrequest __P((int, struct rtentry *, struct sockaddr *)); +void arpwhohas __P((struct arpcom *, struct in_addr *)); + +int ether_addmulti __P((struct ifreq *, struct arpcom *)); +int ether_delmulti __P((struct ifreq *, struct arpcom *)); + +/* + * 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_char enm_addrlo[6]; /* low or only address of range */ + u_char enm_addrhi[6]; /* high or only address of range */ + struct arpcom *enm_ac; /* back pointer to arpcom */ + u_int enm_refcount; /* no. claims to this addr/range */ + struct ether_multi *enm_next; /* ptr to next ether_multi */ +}; + +/* + * 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_char addrlo[6]; */ \ + /* u_char addrhi[6]; */ \ + /* struct arpcom *ac; */ \ + /* struct ether_multi *enm; */ \ +{ \ + for ((enm) = (ac)->ac_multiaddrs; \ + (enm) != NULL && \ + (bcmp((enm)->enm_addrlo, (addrlo), 6) != 0 || \ + bcmp((enm)->enm_addrhi, (addrhi), 6) != 0); \ + (enm) = (enm)->enm_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_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; \ + ETHER_NEXT_MULTI((step), (enm)); \ +} + +#endif |
