X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=libs%2Fwatt32%2Fnetinet%2Fif_ether.h;fp=libs%2Fwatt32%2Fnetinet%2Fif_ether.h;h=566303a9c67a23e5b7b50c9a82b3ed8ab93b4bef;hb=214a070238552de6167bbf506cbc23006969a182;hp=0000000000000000000000000000000000000000;hpb=d3c8a942b99443abf0c11d9759994022ed6da597;p=oftp diff --git a/libs/watt32/netinet/if_ether.h b/libs/watt32/netinet/if_ether.h new file mode 100644 index 0000000..566303a --- /dev/null +++ b/libs/watt32/netinet/if_ether.h @@ -0,0 +1,225 @@ +/*!\file inc/netinet/if_ether.h + * Ethernet definitions. + */ + +/* Modified for emx by hv 1994 + * + * Copyright (c) 1982, 1986 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. + * + * from: @(#)if_ether.h 7.5 (Berkeley) 6/28/90 + * $Id: if_ether.h,v 1.8 1994/02/02 05:58:54 hpeyerl Exp $ + */ + +#ifndef __NETINET_IF_ETHER_H +#define __NETINET_IF_ETHER_H + +#include + +/* + * Ethernet address - 6 octets + * this is only used by the ethers(3) functions. + */ +struct ether_addr { + u_char ether_addr_octet[6]; + }; + +/* + * 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 */ +/* the IBM header corrects the following to 0x608 for OS/2 but I believe + * this is just a dirty hack + */ +#define ETHERTYPE_ARP 0x0806 /* address resolution protocol */ +#define ETHERTYPE_IP 0x0800 /* IP 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) + +/* + * 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]; \ + } + + +/* + * 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 */ +}; + +/* + * Internet to ethernet address resolution table. + */ + +struct arptab { + struct in_addr at_iaddr; /* internet address */ + u_char at_enaddr[6]; /* ethernet address */ + u_char at_timer; /* minutes since last reference */ + u_char at_flags; /* flags */ + struct mbuf *at_hold; /* last packet until resolved/timeout */ +/* only os2 */ + u_short at_rcf; + u_short at_rseg[8]; + u_long at_millisec; + int at_interface; +}; + + +extern u_char etherbroadcastaddr[6]; +extern u_char ether_ipmulticast_min[6]; +extern u_char ether_ipmulticast_max[6]; + +/* + * 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; + }; + +#include + +/* + * 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