if_arcsubr.c revision 139823
189099Sfjoe/* $NetBSD: if_arcsubr.c,v 1.36 2001/06/14 05:44:23 itojun Exp $ */ 289099Sfjoe/* $FreeBSD: head/sys/net/if_arcsubr.c 139823 2005-01-07 01:45:51Z imp $ */ 389099Sfjoe 4139823Simp/*- 589099Sfjoe * Copyright (c) 1994, 1995 Ignatios Souvatzis 689099Sfjoe * Copyright (c) 1982, 1989, 1993 789099Sfjoe * The Regents of the University of California. All rights reserved. 889099Sfjoe * 989099Sfjoe * Redistribution and use in source and binary forms, with or without 1089099Sfjoe * modification, are permitted provided that the following conditions 1189099Sfjoe * are met: 1289099Sfjoe * 1. Redistributions of source code must retain the above copyright 1389099Sfjoe * notice, this list of conditions and the following disclaimer. 1489099Sfjoe * 2. Redistributions in binary form must reproduce the above copyright 1589099Sfjoe * notice, this list of conditions and the following disclaimer in the 1689099Sfjoe * documentation and/or other materials provided with the distribution. 1789099Sfjoe * 3. All advertising materials mentioning features or use of this software 1889099Sfjoe * must display the following acknowledgement: 1989099Sfjoe * This product includes software developed by the University of 2089099Sfjoe * California, Berkeley and its contributors. 2189099Sfjoe * 4. Neither the name of the University nor the names of its contributors 2289099Sfjoe * may be used to endorse or promote products derived from this software 2389099Sfjoe * without specific prior written permission. 2489099Sfjoe * 2589099Sfjoe * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2689099Sfjoe * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2789099Sfjoe * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2889099Sfjoe * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2989099Sfjoe * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 3089099Sfjoe * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 3189099Sfjoe * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 3289099Sfjoe * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3389099Sfjoe * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3489099Sfjoe * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3589099Sfjoe * SUCH DAMAGE. 3689099Sfjoe * 3789099Sfjoe * from: NetBSD: if_ethersubr.c,v 1.9 1994/06/29 06:36:11 cgd Exp 3889099Sfjoe * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93 3989099Sfjoe * 4089099Sfjoe */ 4189099Sfjoe#include "opt_inet.h" 4289099Sfjoe#include "opt_inet6.h" 43109771Sfjoe#include "opt_ipx.h" 4489099Sfjoe 4589099Sfjoe#include <sys/param.h> 4689099Sfjoe#include <sys/systm.h> 4789099Sfjoe#include <sys/kernel.h> 48129880Sphk#include <sys/module.h> 4989099Sfjoe#include <sys/malloc.h> 5089099Sfjoe#include <sys/mbuf.h> 5189099Sfjoe#include <sys/protosw.h> 5289099Sfjoe#include <sys/socket.h> 5389099Sfjoe#include <sys/sockio.h> 5489099Sfjoe#include <sys/errno.h> 5589099Sfjoe#include <sys/syslog.h> 5689099Sfjoe 5789099Sfjoe#include <machine/cpu.h> 5889099Sfjoe 5989099Sfjoe#include <net/if.h> 6089099Sfjoe#include <net/netisr.h> 6189099Sfjoe#include <net/route.h> 6289099Sfjoe#include <net/if_dl.h> 6389099Sfjoe#include <net/if_types.h> 6489099Sfjoe#include <net/if_arc.h> 6589099Sfjoe#include <net/if_arp.h> 6689099Sfjoe#include <net/bpf.h> 6789099Sfjoe 6889099Sfjoe#if defined(INET) || defined(INET6) 6989099Sfjoe#include <netinet/in.h> 7089099Sfjoe#include <netinet/in_var.h> 7189099Sfjoe#include <netinet/if_ether.h> 7289099Sfjoe#endif 7389099Sfjoe 7489099Sfjoe#ifdef INET6 7589099Sfjoe#include <netinet6/nd6.h> 7689099Sfjoe#endif 7789099Sfjoe 78109771Sfjoe#ifdef IPX 79109771Sfjoe#include <netipx/ipx.h> 80109771Sfjoe#include <netipx/ipx_if.h> 81109771Sfjoe#endif 82109771Sfjoe 8389099SfjoeMODULE_VERSION(arcnet, 1); 8489099Sfjoe 8589099Sfjoe#define ARCNET_ALLOW_BROKEN_ARP 8689099Sfjoe 8792725Salfredstatic struct mbuf *arc_defrag(struct ifnet *, struct mbuf *); 88109771Sfjoestatic int arc_resolvemulti(struct ifnet *, struct sockaddr **, 89109771Sfjoe struct sockaddr *); 9089099Sfjoe 9189099Sfjoeu_int8_t arcbroadcastaddr = 0; 9289099Sfjoe 93110106Sfjoe#define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp)) 94110106Sfjoe 9589099Sfjoe#define senderr(e) { error = (e); goto bad;} 96109771Sfjoe#define SIN(s) ((struct sockaddr_in *)s) 97109771Sfjoe#define SIPX(s) ((struct sockaddr_ipx *)s) 9889099Sfjoe 9989099Sfjoe/* 10089099Sfjoe * ARCnet output routine. 10189099Sfjoe * Encapsulate a packet of type family for the local net. 10289099Sfjoe * Assumes that ifp is actually pointer to arccom structure. 10389099Sfjoe */ 10489099Sfjoeint 10589099Sfjoearc_output(ifp, m, dst, rt0) 10689099Sfjoe struct ifnet *ifp; 10789099Sfjoe struct mbuf *m; 10889099Sfjoe struct sockaddr *dst; 10989099Sfjoe struct rtentry *rt0; 11089099Sfjoe{ 11189099Sfjoe struct arc_header *ah; 11289099Sfjoe int error; 11389099Sfjoe u_int8_t atype, adst; 114109771Sfjoe int loop_copy = 0; 115110106Sfjoe int isphds; 11689099Sfjoe 11789099Sfjoe if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 11889099Sfjoe return(ENETDOWN); /* m, m1 aren't initialized yet */ 11989099Sfjoe 12089099Sfjoe error = 0; 12189099Sfjoe 12289099Sfjoe switch (dst->sa_family) { 12389099Sfjoe#ifdef INET 12489099Sfjoe case AF_INET: 12589099Sfjoe 12689099Sfjoe /* 12789099Sfjoe * For now, use the simple IP addr -> ARCnet addr mapping 12889099Sfjoe */ 12989099Sfjoe if (m->m_flags & (M_BCAST|M_MCAST)) 13089099Sfjoe adst = arcbroadcastaddr; /* ARCnet broadcast address */ 13189099Sfjoe else if (ifp->if_flags & IFF_NOARP) 13289099Sfjoe adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF; 133128636Sluigi else { 134128636Sluigi error = arpresolve(ifp, rt0, m, dst, &adst); 135128636Sluigi if (error) 136128636Sluigi return (error == EWOULDBLOCK ? 0 : error); 137128636Sluigi } 13889099Sfjoe 13989099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 14089099Sfjoe ARCTYPE_IP_OLD : ARCTYPE_IP; 14189099Sfjoe break; 142127260Smdodd case AF_ARP: 143127260Smdodd { 144127260Smdodd struct arphdr *ah; 145127260Smdodd ah = mtod(m, struct arphdr *); 146127260Smdodd ah->ar_hrd = htons(ARPHRD_ARCNET); 147127260Smdodd 148127260Smdodd loop_copy = -1; /* if this is for us, don't do it */ 149127260Smdodd 150127260Smdodd switch(ntohs(ah->ar_op)) { 151127260Smdodd case ARPOP_REVREQUEST: 152127260Smdodd case ARPOP_REVREPLY: 153127275Smdodd atype = ARCTYPE_REVARP; 154127260Smdodd break; 155127260Smdodd case ARPOP_REQUEST: 156127260Smdodd case ARPOP_REPLY: 157127260Smdodd default: 158127275Smdodd atype = ARCTYPE_ARP; 159127260Smdodd break; 160127260Smdodd } 161127260Smdodd 162127260Smdodd if (m->m_flags & M_BCAST) 163127290Smdodd bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN); 164127260Smdodd else 165127290Smdodd bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN); 166127260Smdodd 167127260Smdodd } 168127260Smdodd break; 16989099Sfjoe#endif 17089099Sfjoe#ifdef INET6 17189099Sfjoe case AF_INET6: 172128636Sluigi error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)&adst); 173128636Sluigi if (error) 174128636Sluigi return (error); 17589099Sfjoe atype = ARCTYPE_INET6; 17689099Sfjoe break; 17789099Sfjoe#endif 178109771Sfjoe#ifdef IPX 179109771Sfjoe case AF_IPX: 180109771Sfjoe adst = SIPX(dst)->sipx_addr.x_host.c_host[5]; 181109771Sfjoe atype = ARCTYPE_IPX; 182109771Sfjoe if (adst == 0xff) 183109771Sfjoe adst = arcbroadcastaddr; 184109771Sfjoe break; 185109771Sfjoe#endif 18689099Sfjoe 18789099Sfjoe case AF_UNSPEC: 188109771Sfjoe loop_copy = -1; 18989099Sfjoe ah = (struct arc_header *)dst->sa_data; 19089099Sfjoe adst = ah->arc_dhost; 19189099Sfjoe atype = ah->arc_type; 19289099Sfjoe 19389099Sfjoe if (atype == ARCTYPE_ARP) { 19489099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 19589099Sfjoe ARCTYPE_ARP_OLD: ARCTYPE_ARP; 19689099Sfjoe 19789099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 19889099Sfjoe /* 19989099Sfjoe * XXX It's not clear per RFC826 if this is needed, but 20089099Sfjoe * "assigned numbers" say this is wrong. 20189099Sfjoe * However, e.g., AmiTCP 3.0Beta used it... we make this 20289099Sfjoe * switchable for emergency cases. Not perfect, but... 20389099Sfjoe */ 20489099Sfjoe if (ifp->if_flags & IFF_LINK2) 205109771Sfjoe mtod(m, struct arphdr *)->ar_pro = atype - 1; 20689099Sfjoe#endif 20789099Sfjoe } 20889099Sfjoe break; 20989099Sfjoe 21089099Sfjoe default: 211105598Sbrooks if_printf(ifp, "can't handle af%d\n", dst->sa_family); 21289099Sfjoe senderr(EAFNOSUPPORT); 21389099Sfjoe } 21489099Sfjoe 215110106Sfjoe isphds = arc_isphds(atype); 216111119Simp M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_DONTWAIT); 21789099Sfjoe if (m == 0) 21889099Sfjoe senderr(ENOBUFS); 21989099Sfjoe ah = mtod(m, struct arc_header *); 22089099Sfjoe ah->arc_type = atype; 22189099Sfjoe ah->arc_dhost = adst; 222110106Sfjoe ah->arc_shost = ARC_LLADDR(ifp); 223110106Sfjoe if (isphds) { 224110106Sfjoe ah->arc_flag = 0; 225110106Sfjoe ah->arc_seqid = 0; 226110106Sfjoe } 22789099Sfjoe 228109771Sfjoe if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 229109771Sfjoe if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 230109771Sfjoe struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 231109771Sfjoe 232109771Sfjoe (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN); 233109771Sfjoe } else if (ah->arc_dhost == ah->arc_shost) { 234109771Sfjoe (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN); 235109771Sfjoe return (0); /* XXX */ 236109771Sfjoe } 237109771Sfjoe } 238109771Sfjoe 239106939Ssam BPF_MTAP(ifp, m); 24089099Sfjoe 241130549Smlaier IFQ_HANDOFF(ifp, m, error); 24289099Sfjoe 24389099Sfjoe return (error); 24489099Sfjoe 24589099Sfjoebad: 24689099Sfjoe if (m) 24789099Sfjoe m_freem(m); 24889099Sfjoe return (error); 24989099Sfjoe} 25089099Sfjoe 25189099Sfjoevoid 25289099Sfjoearc_frag_init(ifp) 25389099Sfjoe struct ifnet *ifp; 25489099Sfjoe{ 25589099Sfjoe struct arccom *ac; 25689099Sfjoe 25789099Sfjoe ac = (struct arccom *)ifp; 25889099Sfjoe ac->curr_frag = 0; 25989099Sfjoe} 26089099Sfjoe 26189099Sfjoestruct mbuf * 26289099Sfjoearc_frag_next(ifp) 26389099Sfjoe struct ifnet *ifp; 26489099Sfjoe{ 26589099Sfjoe struct arccom *ac; 26689099Sfjoe struct mbuf *m; 26789099Sfjoe struct arc_header *ah; 26889099Sfjoe 26989099Sfjoe ac = (struct arccom *)ifp; 27089099Sfjoe if ((m = ac->curr_frag) == 0) { 27189099Sfjoe int tfrags; 27289099Sfjoe 27389099Sfjoe /* dequeue new packet */ 27489099Sfjoe IF_DEQUEUE(&ifp->if_snd, m); 27589099Sfjoe if (m == 0) 27689099Sfjoe return 0; 27789099Sfjoe 27889099Sfjoe ah = mtod(m, struct arc_header *); 27989099Sfjoe if (!arc_isphds(ah->arc_type)) 28089099Sfjoe return m; 28189099Sfjoe 28289099Sfjoe ++ac->ac_seqid; /* make the seqid unique */ 283109771Sfjoe tfrags = (m->m_pkthdr.len + ARC_MAX_DATA - 1) / ARC_MAX_DATA; 28489099Sfjoe ac->fsflag = 2 * tfrags - 3; 28589099Sfjoe ac->sflag = 0; 28689099Sfjoe ac->rsflag = ac->fsflag; 28789099Sfjoe ac->arc_dhost = ah->arc_dhost; 28889099Sfjoe ac->arc_shost = ah->arc_shost; 28989099Sfjoe ac->arc_type = ah->arc_type; 29089099Sfjoe 291110106Sfjoe m_adj(m, ARC_HDRNEWLEN); 29289099Sfjoe ac->curr_frag = m; 29389099Sfjoe } 29489099Sfjoe 29589099Sfjoe /* split out next fragment and return it */ 29689099Sfjoe if (ac->sflag < ac->fsflag) { 29789099Sfjoe /* we CAN'T have short packets here */ 298111119Simp ac->curr_frag = m_split(m, ARC_MAX_DATA, M_DONTWAIT); 29989099Sfjoe if (ac->curr_frag == 0) { 30093750Sluigi m_freem(m); 30189099Sfjoe return 0; 30289099Sfjoe } 30389099Sfjoe 304111119Simp M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT); 30589099Sfjoe if (m == 0) { 30693750Sluigi m_freem(ac->curr_frag); 30789099Sfjoe ac->curr_frag = 0; 30889099Sfjoe return 0; 30989099Sfjoe } 31089099Sfjoe 31189099Sfjoe ah = mtod(m, struct arc_header *); 31289099Sfjoe ah->arc_flag = ac->rsflag; 31389099Sfjoe ah->arc_seqid = ac->ac_seqid; 31489099Sfjoe 31589099Sfjoe ac->sflag += 2; 31689099Sfjoe ac->rsflag = ac->sflag; 31789099Sfjoe } else if ((m->m_pkthdr.len >= 31889099Sfjoe ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) && 31989099Sfjoe (m->m_pkthdr.len <= 32089099Sfjoe ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) { 32189099Sfjoe ac->curr_frag = 0; 32289099Sfjoe 323111119Simp M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_DONTWAIT); 32489099Sfjoe if (m == 0) 32589099Sfjoe return 0; 32689099Sfjoe 32789099Sfjoe ah = mtod(m, struct arc_header *); 32889099Sfjoe ah->arc_flag = 0xFF; 32989099Sfjoe ah->arc_seqid = 0xFFFF; 33089099Sfjoe ah->arc_type2 = ac->arc_type; 33189099Sfjoe ah->arc_flag2 = ac->sflag; 33289099Sfjoe ah->arc_seqid2 = ac->ac_seqid; 33389099Sfjoe } else { 33489099Sfjoe ac->curr_frag = 0; 33589099Sfjoe 336111119Simp M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT); 33789099Sfjoe if (m == 0) 33889099Sfjoe return 0; 33989099Sfjoe 34089099Sfjoe ah = mtod(m, struct arc_header *); 34189099Sfjoe ah->arc_flag = ac->sflag; 34289099Sfjoe ah->arc_seqid = ac->ac_seqid; 34389099Sfjoe } 34489099Sfjoe 34589099Sfjoe ah->arc_dhost = ac->arc_dhost; 34689099Sfjoe ah->arc_shost = ac->arc_shost; 34789099Sfjoe ah->arc_type = ac->arc_type; 34889099Sfjoe 34989099Sfjoe return m; 35089099Sfjoe} 35189099Sfjoe 35289099Sfjoe/* 35389099Sfjoe * Defragmenter. Returns mbuf if last packet found, else 35489099Sfjoe * NULL. frees imcoming mbuf as necessary. 35589099Sfjoe */ 35689099Sfjoe 357105228Sphkstatic __inline struct mbuf * 35889099Sfjoearc_defrag(ifp, m) 35989099Sfjoe struct ifnet *ifp; 36089099Sfjoe struct mbuf *m; 36189099Sfjoe{ 36289099Sfjoe struct arc_header *ah, *ah1; 36389099Sfjoe struct arccom *ac; 36489099Sfjoe struct ac_frag *af; 36589099Sfjoe struct mbuf *m1; 36689099Sfjoe char *s; 36789099Sfjoe int newflen; 36889099Sfjoe u_char src,dst,typ; 36989099Sfjoe 37089099Sfjoe ac = (struct arccom *)ifp; 37189099Sfjoe 37289099Sfjoe if (m->m_len < ARC_HDRNEWLEN) { 37389099Sfjoe m = m_pullup(m, ARC_HDRNEWLEN); 37489099Sfjoe if (m == NULL) { 37589099Sfjoe ++ifp->if_ierrors; 37689099Sfjoe return NULL; 37789099Sfjoe } 37889099Sfjoe } 37989099Sfjoe 38089099Sfjoe ah = mtod(m, struct arc_header *); 38189099Sfjoe typ = ah->arc_type; 38289099Sfjoe 38389099Sfjoe if (!arc_isphds(typ)) 38489099Sfjoe return m; 38589099Sfjoe 38689099Sfjoe src = ah->arc_shost; 38789099Sfjoe dst = ah->arc_dhost; 38889099Sfjoe 38989099Sfjoe if (ah->arc_flag == 0xff) { 39089099Sfjoe m_adj(m, 4); 39189099Sfjoe 39289099Sfjoe if (m->m_len < ARC_HDRNEWLEN) { 39389099Sfjoe m = m_pullup(m, ARC_HDRNEWLEN); 39489099Sfjoe if (m == NULL) { 39589099Sfjoe ++ifp->if_ierrors; 39689099Sfjoe return NULL; 39789099Sfjoe } 39889099Sfjoe } 39989099Sfjoe 40089099Sfjoe ah = mtod(m, struct arc_header *); 40189099Sfjoe } 40289099Sfjoe 40389099Sfjoe af = &ac->ac_fragtab[src]; 40489099Sfjoe m1 = af->af_packet; 40589099Sfjoe s = "debug code error"; 40689099Sfjoe 40789099Sfjoe if (ah->arc_flag & 1) { 40889099Sfjoe /* 40989099Sfjoe * first fragment. We always initialize, which is 41089099Sfjoe * about the right thing to do, as we only want to 41189099Sfjoe * accept one fragmented packet per src at a time. 41289099Sfjoe */ 41389099Sfjoe if (m1 != NULL) 41489099Sfjoe m_freem(m1); 41589099Sfjoe 41689099Sfjoe af->af_packet = m; 41789099Sfjoe m1 = m; 41889099Sfjoe af->af_maxflag = ah->arc_flag; 41989099Sfjoe af->af_lastseen = 0; 42089099Sfjoe af->af_seqid = ah->arc_seqid; 42189099Sfjoe 42289099Sfjoe return NULL; 42389099Sfjoe /* notreached */ 42489099Sfjoe } else { 42589099Sfjoe /* check for unfragmented packet */ 42689099Sfjoe if (ah->arc_flag == 0) 42789099Sfjoe return m; 42889099Sfjoe 42989099Sfjoe /* do we have a first packet from that src? */ 43089099Sfjoe if (m1 == NULL) { 43189099Sfjoe s = "no first frag"; 43289099Sfjoe goto outofseq; 43389099Sfjoe } 43489099Sfjoe 43589099Sfjoe ah1 = mtod(m1, struct arc_header *); 43689099Sfjoe 43789099Sfjoe if (ah->arc_seqid != ah1->arc_seqid) { 43889099Sfjoe s = "seqid differs"; 43989099Sfjoe goto outofseq; 44089099Sfjoe } 44189099Sfjoe 44289099Sfjoe if (typ != ah1->arc_type) { 44389099Sfjoe s = "type differs"; 44489099Sfjoe goto outofseq; 44589099Sfjoe } 44689099Sfjoe 44789099Sfjoe if (dst != ah1->arc_dhost) { 44889099Sfjoe s = "dest host differs"; 44989099Sfjoe goto outofseq; 45089099Sfjoe } 45189099Sfjoe 45289099Sfjoe /* typ, seqid and dst are ok here. */ 45389099Sfjoe 45489099Sfjoe if (ah->arc_flag == af->af_lastseen) { 45589099Sfjoe m_freem(m); 45689099Sfjoe return NULL; 45789099Sfjoe } 45889099Sfjoe 45989099Sfjoe if (ah->arc_flag == af->af_lastseen + 2) { 46089099Sfjoe /* ok, this is next fragment */ 46189099Sfjoe af->af_lastseen = ah->arc_flag; 46289099Sfjoe m_adj(m,ARC_HDRNEWLEN); 46389099Sfjoe 46489099Sfjoe /* 46589099Sfjoe * m_cat might free the first mbuf (with pkthdr) 46689099Sfjoe * in 2nd chain; therefore: 46789099Sfjoe */ 46889099Sfjoe 46989099Sfjoe newflen = m->m_pkthdr.len; 47089099Sfjoe 47189099Sfjoe m_cat(m1,m); 47289099Sfjoe 47389099Sfjoe m1->m_pkthdr.len += newflen; 47489099Sfjoe 47589099Sfjoe /* is it the last one? */ 47689099Sfjoe if (af->af_lastseen > af->af_maxflag) { 47789099Sfjoe af->af_packet = NULL; 47889099Sfjoe return(m1); 47989099Sfjoe } else 48089099Sfjoe return NULL; 48189099Sfjoe } 48289099Sfjoe s = "other reason"; 48389099Sfjoe /* if all else fails, it is out of sequence, too */ 48489099Sfjoe } 48589099Sfjoeoutofseq: 48689099Sfjoe if (m1) { 48789099Sfjoe m_freem(m1); 48889099Sfjoe af->af_packet = NULL; 48989099Sfjoe } 49089099Sfjoe 49189099Sfjoe if (m) 49289099Sfjoe m_freem(m); 49389099Sfjoe 494121816Sbrooks log(LOG_INFO,"%s: got out of seq. packet: %s\n", 495121816Sbrooks ifp->if_xname, s); 49689099Sfjoe 49789099Sfjoe return NULL; 49889099Sfjoe} 49989099Sfjoe 50089099Sfjoe/* 50189099Sfjoe * return 1 if Packet Header Definition Standard, else 0. 50289099Sfjoe * For now: old IP, old ARP aren't obviously. Lacking correct information, 50389099Sfjoe * we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS. 50489099Sfjoe * (Apple and Novell corporations were involved, among others, in PHDS work). 50589099Sfjoe * Easiest is to assume that everybody else uses that, too. 50689099Sfjoe */ 50789099Sfjoeint 50889099Sfjoearc_isphds(type) 50989099Sfjoe u_int8_t type; 51089099Sfjoe{ 51189099Sfjoe return (type != ARCTYPE_IP_OLD && 51289099Sfjoe type != ARCTYPE_ARP_OLD && 51389099Sfjoe type != ARCTYPE_DIAGNOSE); 51489099Sfjoe} 51589099Sfjoe 51689099Sfjoe/* 51789099Sfjoe * Process a received Arcnet packet; 51889099Sfjoe * the packet is in the mbuf chain m with 51989099Sfjoe * the ARCnet header. 52089099Sfjoe */ 52189099Sfjoevoid 52289099Sfjoearc_input(ifp, m) 52389099Sfjoe struct ifnet *ifp; 52489099Sfjoe struct mbuf *m; 52589099Sfjoe{ 52689099Sfjoe struct arc_header *ah; 527111888Sjlemon int isr; 52889099Sfjoe u_int8_t atype; 52989099Sfjoe 53089099Sfjoe if ((ifp->if_flags & IFF_UP) == 0) { 53189099Sfjoe m_freem(m); 53289099Sfjoe return; 53389099Sfjoe } 53489099Sfjoe 53589099Sfjoe /* possibly defragment: */ 53689099Sfjoe m = arc_defrag(ifp, m); 53789099Sfjoe if (m == NULL) 53889099Sfjoe return; 53989099Sfjoe 540106939Ssam BPF_MTAP(ifp, m); 54189099Sfjoe 54289099Sfjoe ah = mtod(m, struct arc_header *); 543109771Sfjoe /* does this belong to us? */ 544110106Sfjoe if ((ifp->if_flags & IFF_PROMISC) == 0 545109771Sfjoe && ah->arc_dhost != arcbroadcastaddr 546110106Sfjoe && ah->arc_dhost != ARC_LLADDR(ifp)) { 547109771Sfjoe m_freem(m); 548109771Sfjoe return; 549109771Sfjoe } 55089099Sfjoe 55189099Sfjoe ifp->if_ibytes += m->m_pkthdr.len; 55289099Sfjoe 553109771Sfjoe if (ah->arc_dhost == arcbroadcastaddr) { 55489099Sfjoe m->m_flags |= M_BCAST|M_MCAST; 55589099Sfjoe ifp->if_imcasts++; 55689099Sfjoe } 55789099Sfjoe 55889099Sfjoe atype = ah->arc_type; 55989099Sfjoe switch (atype) { 56089099Sfjoe#ifdef INET 56189099Sfjoe case ARCTYPE_IP: 56289099Sfjoe m_adj(m, ARC_HDRNEWLEN); 563122702Sandre if (ip_fastforward(m)) 564109771Sfjoe return; 565111888Sjlemon isr = NETISR_IP; 56689099Sfjoe break; 56789099Sfjoe 56889099Sfjoe case ARCTYPE_IP_OLD: 56989099Sfjoe m_adj(m, ARC_HDRLEN); 570122702Sandre if (ip_fastforward(m)) 571109771Sfjoe return; 572111888Sjlemon isr = NETISR_IP; 57389099Sfjoe break; 57489099Sfjoe 57589099Sfjoe case ARCTYPE_ARP: 57689099Sfjoe if (ifp->if_flags & IFF_NOARP) { 57789099Sfjoe /* Discard packet if ARP is disabled on interface */ 57889099Sfjoe m_freem(m); 57989099Sfjoe return; 58089099Sfjoe } 58189099Sfjoe m_adj(m, ARC_HDRNEWLEN); 582111888Sjlemon isr = NETISR_ARP; 58389099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 58489099Sfjoe mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP); 58589099Sfjoe#endif 58689099Sfjoe break; 58789099Sfjoe 58889099Sfjoe case ARCTYPE_ARP_OLD: 58989099Sfjoe if (ifp->if_flags & IFF_NOARP) { 59089099Sfjoe /* Discard packet if ARP is disabled on interface */ 59189099Sfjoe m_freem(m); 59289099Sfjoe return; 59389099Sfjoe } 59489099Sfjoe m_adj(m, ARC_HDRLEN); 595111888Sjlemon isr = NETISR_ARP; 59689099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 59789099Sfjoe mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP); 59889099Sfjoe#endif 59989099Sfjoe break; 60089099Sfjoe#endif 60189099Sfjoe#ifdef INET6 60289099Sfjoe case ARCTYPE_INET6: 60389099Sfjoe m_adj(m, ARC_HDRNEWLEN); 604111888Sjlemon isr = NETISR_IPV6; 60589099Sfjoe break; 60689099Sfjoe#endif 607109771Sfjoe#ifdef IPX 608109771Sfjoe case ARCTYPE_IPX: 609109771Sfjoe m_adj(m, ARC_HDRNEWLEN); 610111888Sjlemon isr = NETISR_IPX; 611109771Sfjoe break; 612109771Sfjoe#endif 61389099Sfjoe default: 61489099Sfjoe m_freem(m); 61589099Sfjoe return; 61689099Sfjoe } 617111888Sjlemon netisr_dispatch(isr, m); 61889099Sfjoe} 61989099Sfjoe 62089099Sfjoe/* 62189099Sfjoe * Register (new) link level address. 62289099Sfjoe */ 62389099Sfjoevoid 62489099Sfjoearc_storelladdr(ifp, lla) 62589099Sfjoe struct ifnet *ifp; 62689099Sfjoe u_int8_t lla; 62789099Sfjoe{ 628110106Sfjoe ARC_LLADDR(ifp) = lla; 62989099Sfjoe} 63089099Sfjoe 63189099Sfjoe/* 63289099Sfjoe * Perform common duties while attaching to interface list 63389099Sfjoe */ 63489099Sfjoevoid 63589099Sfjoearc_ifattach(ifp, lla) 63689099Sfjoe struct ifnet *ifp; 63789099Sfjoe u_int8_t lla; 63889099Sfjoe{ 63989099Sfjoe struct ifaddr *ifa; 64089099Sfjoe struct sockaddr_dl *sdl; 64189099Sfjoe struct arccom *ac; 64289099Sfjoe 64389099Sfjoe if_attach(ifp); 64489099Sfjoe ifp->if_type = IFT_ARCNET; 64589099Sfjoe ifp->if_addrlen = 1; 64689099Sfjoe ifp->if_hdrlen = ARC_HDRLEN; 64789099Sfjoe ifp->if_mtu = 1500; 648109771Sfjoe ifp->if_resolvemulti = arc_resolvemulti; 64989099Sfjoe if (ifp->if_baudrate == 0) 65089099Sfjoe ifp->if_baudrate = 2500000; 65189099Sfjoe#if __FreeBSD_version < 500000 65289099Sfjoe ifa = ifnet_addrs[ifp->if_index - 1]; 65389099Sfjoe#else 65489099Sfjoe ifa = ifaddr_byindex(ifp->if_index); 65589099Sfjoe#endif 656135577Sstefanf KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 65789099Sfjoe sdl = (struct sockaddr_dl *)ifa->ifa_addr; 65889099Sfjoe sdl->sdl_type = IFT_ARCNET; 65989099Sfjoe sdl->sdl_alen = ifp->if_addrlen; 66089099Sfjoe 66189099Sfjoe if (ifp->if_flags & IFF_BROADCAST) 66289099Sfjoe ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI; 66389099Sfjoe 66489099Sfjoe ac = (struct arccom *)ifp; 66589099Sfjoe ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */ 66689099Sfjoe if (lla == 0) { 66789099Sfjoe /* XXX this message isn't entirely clear, to me -- cgd */ 668121816Sbrooks log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n", 669121816Sbrooks ifp->if_xname, ifp->if_xname); 67089099Sfjoe } 67189099Sfjoe arc_storelladdr(ifp, lla); 67289099Sfjoe 67389099Sfjoe ifp->if_broadcastaddr = &arcbroadcastaddr; 67489099Sfjoe 67589099Sfjoe bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN); 67689099Sfjoe} 67789099Sfjoe 67889099Sfjoevoid 67989099Sfjoearc_ifdetach(ifp) 68089099Sfjoe struct ifnet *ifp; 68189099Sfjoe{ 68289099Sfjoe bpfdetach(ifp); 68389099Sfjoe if_detach(ifp); 68489099Sfjoe} 68589099Sfjoe 68689099Sfjoeint 68789099Sfjoearc_ioctl(ifp, command, data) 68889099Sfjoe struct ifnet *ifp; 68989099Sfjoe int command; 69089099Sfjoe caddr_t data; 69189099Sfjoe{ 69289099Sfjoe struct ifaddr *ifa = (struct ifaddr *) data; 69389099Sfjoe struct ifreq *ifr = (struct ifreq *) data; 69489099Sfjoe int error = 0; 69589099Sfjoe 69689099Sfjoe switch (command) { 69789099Sfjoe case SIOCSIFADDR: 69889099Sfjoe ifp->if_flags |= IFF_UP; 69989099Sfjoe switch (ifa->ifa_addr->sa_family) { 70089099Sfjoe#ifdef INET 70189099Sfjoe case AF_INET: 70289099Sfjoe ifp->if_init(ifp->if_softc); /* before arpwhohas */ 70389099Sfjoe arp_ifinit(ifp, ifa); 70489099Sfjoe break; 70589099Sfjoe#endif 706109771Sfjoe#ifdef IPX 707109771Sfjoe /* 708109771Sfjoe * XXX This code is probably wrong 709109771Sfjoe */ 710109771Sfjoe case AF_IPX: 711109771Sfjoe { 712109771Sfjoe struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 713109771Sfjoe 714109771Sfjoe if (ipx_nullhost(*ina)) 715110106Sfjoe ina->x_host.c_host[5] = ARC_LLADDR(ifp); 716109771Sfjoe else 717109771Sfjoe arc_storelladdr(ifp, ina->x_host.c_host[5]); 718109771Sfjoe 719109771Sfjoe /* 720109771Sfjoe * Set new address 721109771Sfjoe */ 722109771Sfjoe ifp->if_init(ifp->if_softc); 723109771Sfjoe break; 724109771Sfjoe } 725109771Sfjoe#endif 72689099Sfjoe default: 72789099Sfjoe ifp->if_init(ifp->if_softc); 72889099Sfjoe break; 72989099Sfjoe } 73089099Sfjoe break; 73189099Sfjoe 732109771Sfjoe case SIOCGIFADDR: 733109771Sfjoe { 734109771Sfjoe struct sockaddr *sa; 735109771Sfjoe 736109771Sfjoe sa = (struct sockaddr *) &ifr->ifr_data; 737110106Sfjoe *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp); 738109771Sfjoe } 739109771Sfjoe break; 740109771Sfjoe 74189099Sfjoe case SIOCADDMULTI: 74289099Sfjoe case SIOCDELMULTI: 74389099Sfjoe if (ifr == NULL) 74489099Sfjoe error = EAFNOSUPPORT; 74589099Sfjoe else { 74689099Sfjoe switch (ifr->ifr_addr.sa_family) { 74789099Sfjoe case AF_INET: 74889099Sfjoe case AF_INET6: 74989099Sfjoe error = 0; 75089099Sfjoe break; 75189099Sfjoe default: 75289099Sfjoe error = EAFNOSUPPORT; 75389099Sfjoe break; 75489099Sfjoe } 75589099Sfjoe } 75689099Sfjoe break; 75789099Sfjoe 75889099Sfjoe case SIOCSIFMTU: 75989099Sfjoe /* 76089099Sfjoe * Set the interface MTU. 76189099Sfjoe * mtu can't be larger than ARCMTU for RFC1051 76289099Sfjoe * and can't be larger than ARC_PHDS_MTU 76389099Sfjoe */ 76489099Sfjoe if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) || 76589099Sfjoe ifr->ifr_mtu > ARC_PHDS_MAXMTU) 76689099Sfjoe error = EINVAL; 76789099Sfjoe else 76889099Sfjoe ifp->if_mtu = ifr->ifr_mtu; 76989099Sfjoe break; 770109771Sfjoe } 77189099Sfjoe 772109771Sfjoe return (error); 773109771Sfjoe} 77489099Sfjoe 775109771Sfjoe/* based on ether_resolvemulti() */ 776109771Sfjoeint 777109771Sfjoearc_resolvemulti(ifp, llsa, sa) 778109771Sfjoe struct ifnet *ifp; 779109771Sfjoe struct sockaddr **llsa; 780109771Sfjoe struct sockaddr *sa; 781109771Sfjoe{ 782109771Sfjoe struct sockaddr_dl *sdl; 783109771Sfjoe struct sockaddr_in *sin; 784109771Sfjoe#ifdef INET6 785109771Sfjoe struct sockaddr_in6 *sin6; 786109771Sfjoe#endif 787109771Sfjoe 788109771Sfjoe switch(sa->sa_family) { 789109771Sfjoe case AF_LINK: 790109771Sfjoe /* 791109771Sfjoe * No mapping needed. Just check that it's a valid MC address. 792109771Sfjoe */ 793109771Sfjoe sdl = (struct sockaddr_dl *)sa; 794109771Sfjoe if (*LLADDR(sdl) != arcbroadcastaddr) 795109771Sfjoe return EADDRNOTAVAIL; 796109771Sfjoe *llsa = 0; 797109771Sfjoe return 0; 798109771Sfjoe#ifdef INET 799109771Sfjoe case AF_INET: 800109771Sfjoe sin = (struct sockaddr_in *)sa; 801109771Sfjoe if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 802109771Sfjoe return EADDRNOTAVAIL; 803109771Sfjoe MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 804109771Sfjoe M_ZERO); 805109771Sfjoe sdl->sdl_len = sizeof *sdl; 806109771Sfjoe sdl->sdl_family = AF_LINK; 807109771Sfjoe sdl->sdl_index = ifp->if_index; 808109771Sfjoe sdl->sdl_type = IFT_ARCNET; 809109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 810109771Sfjoe *LLADDR(sdl) = 0; 811109771Sfjoe *llsa = (struct sockaddr *)sdl; 812109771Sfjoe return 0; 813109771Sfjoe#endif 814109771Sfjoe#ifdef INET6 815109771Sfjoe case AF_INET6: 816109771Sfjoe sin6 = (struct sockaddr_in6 *)sa; 817109771Sfjoe if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 818109771Sfjoe /* 819109771Sfjoe * An IP6 address of 0 means listen to all 820109771Sfjoe * of the Ethernet multicast address used for IP6. 821109771Sfjoe * (This is used for multicast routers.) 822109771Sfjoe */ 823109771Sfjoe ifp->if_flags |= IFF_ALLMULTI; 824109771Sfjoe *llsa = 0; 825109771Sfjoe return 0; 82689099Sfjoe } 827109771Sfjoe if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 828109771Sfjoe return EADDRNOTAVAIL; 829109771Sfjoe MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 830109771Sfjoe M_ZERO); 831109771Sfjoe sdl->sdl_len = sizeof *sdl; 832109771Sfjoe sdl->sdl_family = AF_LINK; 833109771Sfjoe sdl->sdl_index = ifp->if_index; 834109771Sfjoe sdl->sdl_type = IFT_ARCNET; 835109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 836109771Sfjoe *LLADDR(sdl) = 0; 837109771Sfjoe *llsa = (struct sockaddr *)sdl; 838109771Sfjoe return 0; 83989099Sfjoe#endif 840109771Sfjoe 841109771Sfjoe default: 842109771Sfjoe /* 843109771Sfjoe * Well, the text isn't quite right, but it's the name 844109771Sfjoe * that counts... 845109771Sfjoe */ 846109771Sfjoe return EAFNOSUPPORT; 84789099Sfjoe } 84889099Sfjoe} 849