if_arcsubr.c revision 127260
189099Sfjoe/* $NetBSD: if_arcsubr.c,v 1.36 2001/06/14 05:44:23 itojun Exp $ */ 289099Sfjoe/* $FreeBSD: head/sys/net/if_arcsubr.c 127260 2004-03-21 06:34:34Z mdodd $ */ 389099Sfjoe 489099Sfjoe/* 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> 4889099Sfjoe#include <sys/malloc.h> 4989099Sfjoe#include <sys/mbuf.h> 5089099Sfjoe#include <sys/protosw.h> 5189099Sfjoe#include <sys/socket.h> 5289099Sfjoe#include <sys/sockio.h> 5389099Sfjoe#include <sys/errno.h> 5489099Sfjoe#include <sys/syslog.h> 5589099Sfjoe 5689099Sfjoe#include <machine/cpu.h> 5789099Sfjoe 5889099Sfjoe#include <net/if.h> 5989099Sfjoe#include <net/netisr.h> 6089099Sfjoe#include <net/route.h> 6189099Sfjoe#include <net/if_dl.h> 6289099Sfjoe#include <net/if_types.h> 6389099Sfjoe#include <net/if_arc.h> 6489099Sfjoe#include <net/if_arp.h> 6589099Sfjoe#include <net/bpf.h> 6689099Sfjoe 6789099Sfjoe#if defined(INET) || defined(INET6) 6889099Sfjoe#include <netinet/in.h> 6989099Sfjoe#include <netinet/in_var.h> 7089099Sfjoe#include <netinet/if_ether.h> 7189099Sfjoe#endif 7289099Sfjoe 7389099Sfjoe#ifdef INET6 7489099Sfjoe#include <netinet6/nd6.h> 7589099Sfjoe#endif 7689099Sfjoe 77109771Sfjoe#ifdef IPX 78109771Sfjoe#include <netipx/ipx.h> 79109771Sfjoe#include <netipx/ipx_if.h> 80109771Sfjoe#endif 81109771Sfjoe 8289099SfjoeMODULE_VERSION(arcnet, 1); 8389099Sfjoe 8489099Sfjoe#define ARCNET_ALLOW_BROKEN_ARP 8589099Sfjoe 8692725Salfredstatic struct mbuf *arc_defrag(struct ifnet *, struct mbuf *); 87109771Sfjoestatic int arc_resolvemulti(struct ifnet *, struct sockaddr **, 88109771Sfjoe struct sockaddr *); 8989099Sfjoe 9089099Sfjoeu_int8_t arcbroadcastaddr = 0; 9189099Sfjoe 92110106Sfjoe#define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp)) 93110106Sfjoe 9489099Sfjoe#define senderr(e) { error = (e); goto bad;} 95109771Sfjoe#define SIN(s) ((struct sockaddr_in *)s) 96109771Sfjoe#define SIPX(s) ((struct sockaddr_ipx *)s) 9789099Sfjoe 9889099Sfjoe/* 9989099Sfjoe * ARCnet output routine. 10089099Sfjoe * Encapsulate a packet of type family for the local net. 10189099Sfjoe * Assumes that ifp is actually pointer to arccom structure. 10289099Sfjoe */ 10389099Sfjoeint 10489099Sfjoearc_output(ifp, m, dst, rt0) 10589099Sfjoe struct ifnet *ifp; 10689099Sfjoe struct mbuf *m; 10789099Sfjoe struct sockaddr *dst; 10889099Sfjoe struct rtentry *rt0; 10989099Sfjoe{ 11089099Sfjoe struct rtentry *rt; 11189099Sfjoe struct arccom *ac; 11289099Sfjoe struct arc_header *ah; 11389099Sfjoe int error; 11489099Sfjoe u_int8_t atype, adst; 115109771Sfjoe int loop_copy = 0; 116110106Sfjoe int isphds; 11789099Sfjoe 11889099Sfjoe if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) 11989099Sfjoe return(ENETDOWN); /* m, m1 aren't initialized yet */ 12089099Sfjoe 12189099Sfjoe error = 0; 12289099Sfjoe ac = (struct arccom *)ifp; 12389099Sfjoe 124111767Smdodd error = rt_check(&rt, &rt0, dst); 125111767Smdodd if (error) 126111767Smdodd goto bad; 12789099Sfjoe 12889099Sfjoe switch (dst->sa_family) { 12989099Sfjoe#ifdef INET 13089099Sfjoe case AF_INET: 13189099Sfjoe 13289099Sfjoe /* 13389099Sfjoe * For now, use the simple IP addr -> ARCnet addr mapping 13489099Sfjoe */ 13589099Sfjoe if (m->m_flags & (M_BCAST|M_MCAST)) 13689099Sfjoe adst = arcbroadcastaddr; /* ARCnet broadcast address */ 13789099Sfjoe else if (ifp->if_flags & IFF_NOARP) 13889099Sfjoe adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF; 13989099Sfjoe else if (!arpresolve(ifp, rt, m, dst, &adst, rt0)) 14089099Sfjoe return 0; /* not resolved yet */ 14189099Sfjoe 14289099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 14389099Sfjoe ARCTYPE_IP_OLD : ARCTYPE_IP; 14489099Sfjoe break; 145127260Smdodd case AF_ARP: 146127260Smdodd { 147127260Smdodd struct arphdr *ah; 148127260Smdodd ah = mtod(m, struct arphdr *); 149127260Smdodd ah->ar_hrd = htons(ARPHRD_ARCNET); 150127260Smdodd 151127260Smdodd loop_copy = -1; /* if this is for us, don't do it */ 152127260Smdodd 153127260Smdodd switch(ntohs(ah->ar_op)) { 154127260Smdodd case ARPOP_REVREQUEST: 155127260Smdodd case ARPOP_REVREPLY: 156127260Smdodd type = htons(ARCTYPE_REVARP); 157127260Smdodd break; 158127260Smdodd case ARPOP_REQUEST: 159127260Smdodd case ARPOP_REPLY: 160127260Smdodd default: 161127260Smdodd type = htons(ARCTYPE_ARP); 162127260Smdodd break; 163127260Smdodd } 164127260Smdodd 165127260Smdodd if (m->m_flags & M_BCAST) 166127260Smdodd bcopy(ifp->if_broadcastaddr, adst, ARC_ADDR_LEN); 167127260Smdodd else 168127260Smdodd bcopy(ar_tha(ah), adst, ARC_ADDR_LEN); 169127260Smdodd 170127260Smdodd } 171127260Smdodd break; 17289099Sfjoe#endif 17389099Sfjoe#ifdef INET6 17489099Sfjoe case AF_INET6: 17589099Sfjoe#ifdef OLDIP6OUTPUT 17689099Sfjoe if (!nd6_resolve(ifp, rt, m, dst, (u_char *)&adst)) 17789099Sfjoe return(0); /* if not yet resolves */ 17889099Sfjoe#else 17989099Sfjoe if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)&adst)) 18089099Sfjoe return(0); /* it must be impossible, but... */ 18189099Sfjoe#endif /* OLDIP6OUTPUT */ 18289099Sfjoe atype = ARCTYPE_INET6; 18389099Sfjoe break; 18489099Sfjoe#endif 185109771Sfjoe#ifdef IPX 186109771Sfjoe case AF_IPX: 187109771Sfjoe adst = SIPX(dst)->sipx_addr.x_host.c_host[5]; 188109771Sfjoe atype = ARCTYPE_IPX; 189109771Sfjoe if (adst == 0xff) 190109771Sfjoe adst = arcbroadcastaddr; 191109771Sfjoe break; 192109771Sfjoe#endif 19389099Sfjoe 19489099Sfjoe case AF_UNSPEC: 195109771Sfjoe loop_copy = -1; 19689099Sfjoe ah = (struct arc_header *)dst->sa_data; 19789099Sfjoe adst = ah->arc_dhost; 19889099Sfjoe atype = ah->arc_type; 19989099Sfjoe 20089099Sfjoe if (atype == ARCTYPE_ARP) { 20189099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 20289099Sfjoe ARCTYPE_ARP_OLD: ARCTYPE_ARP; 20389099Sfjoe 20489099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 20589099Sfjoe /* 20689099Sfjoe * XXX It's not clear per RFC826 if this is needed, but 20789099Sfjoe * "assigned numbers" say this is wrong. 20889099Sfjoe * However, e.g., AmiTCP 3.0Beta used it... we make this 20989099Sfjoe * switchable for emergency cases. Not perfect, but... 21089099Sfjoe */ 21189099Sfjoe if (ifp->if_flags & IFF_LINK2) 212109771Sfjoe mtod(m, struct arphdr *)->ar_pro = atype - 1; 21389099Sfjoe#endif 21489099Sfjoe } 21589099Sfjoe break; 21689099Sfjoe 21789099Sfjoe default: 218105598Sbrooks if_printf(ifp, "can't handle af%d\n", dst->sa_family); 21989099Sfjoe senderr(EAFNOSUPPORT); 22089099Sfjoe } 22189099Sfjoe 222110106Sfjoe isphds = arc_isphds(atype); 223111119Simp M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_DONTWAIT); 22489099Sfjoe if (m == 0) 22589099Sfjoe senderr(ENOBUFS); 22689099Sfjoe ah = mtod(m, struct arc_header *); 22789099Sfjoe ah->arc_type = atype; 22889099Sfjoe ah->arc_dhost = adst; 229110106Sfjoe ah->arc_shost = ARC_LLADDR(ifp); 230110106Sfjoe if (isphds) { 231110106Sfjoe ah->arc_flag = 0; 232110106Sfjoe ah->arc_seqid = 0; 233110106Sfjoe } 23489099Sfjoe 235109771Sfjoe if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 236109771Sfjoe if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 237109771Sfjoe struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 238109771Sfjoe 239109771Sfjoe (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN); 240109771Sfjoe } else if (ah->arc_dhost == ah->arc_shost) { 241109771Sfjoe (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN); 242109771Sfjoe return (0); /* XXX */ 243109771Sfjoe } 244109771Sfjoe } 245109771Sfjoe 246106939Ssam BPF_MTAP(ifp, m); 24789099Sfjoe 24889099Sfjoe if (!IF_HANDOFF(&ifp->if_snd, m, ifp)) { 24989099Sfjoe m = 0; 25089099Sfjoe senderr(ENOBUFS); 25189099Sfjoe } 25289099Sfjoe 25389099Sfjoe return (error); 25489099Sfjoe 25589099Sfjoebad: 25689099Sfjoe if (m) 25789099Sfjoe m_freem(m); 25889099Sfjoe return (error); 25989099Sfjoe} 26089099Sfjoe 26189099Sfjoevoid 26289099Sfjoearc_frag_init(ifp) 26389099Sfjoe struct ifnet *ifp; 26489099Sfjoe{ 26589099Sfjoe struct arccom *ac; 26689099Sfjoe 26789099Sfjoe ac = (struct arccom *)ifp; 26889099Sfjoe ac->curr_frag = 0; 26989099Sfjoe} 27089099Sfjoe 27189099Sfjoestruct mbuf * 27289099Sfjoearc_frag_next(ifp) 27389099Sfjoe struct ifnet *ifp; 27489099Sfjoe{ 27589099Sfjoe struct arccom *ac; 27689099Sfjoe struct mbuf *m; 27789099Sfjoe struct arc_header *ah; 27889099Sfjoe 27989099Sfjoe ac = (struct arccom *)ifp; 28089099Sfjoe if ((m = ac->curr_frag) == 0) { 28189099Sfjoe int tfrags; 28289099Sfjoe 28389099Sfjoe /* dequeue new packet */ 28489099Sfjoe IF_DEQUEUE(&ifp->if_snd, m); 28589099Sfjoe if (m == 0) 28689099Sfjoe return 0; 28789099Sfjoe 28889099Sfjoe ah = mtod(m, struct arc_header *); 28989099Sfjoe if (!arc_isphds(ah->arc_type)) 29089099Sfjoe return m; 29189099Sfjoe 29289099Sfjoe ++ac->ac_seqid; /* make the seqid unique */ 293109771Sfjoe tfrags = (m->m_pkthdr.len + ARC_MAX_DATA - 1) / ARC_MAX_DATA; 29489099Sfjoe ac->fsflag = 2 * tfrags - 3; 29589099Sfjoe ac->sflag = 0; 29689099Sfjoe ac->rsflag = ac->fsflag; 29789099Sfjoe ac->arc_dhost = ah->arc_dhost; 29889099Sfjoe ac->arc_shost = ah->arc_shost; 29989099Sfjoe ac->arc_type = ah->arc_type; 30089099Sfjoe 301110106Sfjoe m_adj(m, ARC_HDRNEWLEN); 30289099Sfjoe ac->curr_frag = m; 30389099Sfjoe } 30489099Sfjoe 30589099Sfjoe /* split out next fragment and return it */ 30689099Sfjoe if (ac->sflag < ac->fsflag) { 30789099Sfjoe /* we CAN'T have short packets here */ 308111119Simp ac->curr_frag = m_split(m, ARC_MAX_DATA, M_DONTWAIT); 30989099Sfjoe if (ac->curr_frag == 0) { 31093750Sluigi m_freem(m); 31189099Sfjoe return 0; 31289099Sfjoe } 31389099Sfjoe 314111119Simp M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT); 31589099Sfjoe if (m == 0) { 31693750Sluigi m_freem(ac->curr_frag); 31789099Sfjoe ac->curr_frag = 0; 31889099Sfjoe return 0; 31989099Sfjoe } 32089099Sfjoe 32189099Sfjoe ah = mtod(m, struct arc_header *); 32289099Sfjoe ah->arc_flag = ac->rsflag; 32389099Sfjoe ah->arc_seqid = ac->ac_seqid; 32489099Sfjoe 32589099Sfjoe ac->sflag += 2; 32689099Sfjoe ac->rsflag = ac->sflag; 32789099Sfjoe } else if ((m->m_pkthdr.len >= 32889099Sfjoe ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) && 32989099Sfjoe (m->m_pkthdr.len <= 33089099Sfjoe ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) { 33189099Sfjoe ac->curr_frag = 0; 33289099Sfjoe 333111119Simp M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_DONTWAIT); 33489099Sfjoe if (m == 0) 33589099Sfjoe return 0; 33689099Sfjoe 33789099Sfjoe ah = mtod(m, struct arc_header *); 33889099Sfjoe ah->arc_flag = 0xFF; 33989099Sfjoe ah->arc_seqid = 0xFFFF; 34089099Sfjoe ah->arc_type2 = ac->arc_type; 34189099Sfjoe ah->arc_flag2 = ac->sflag; 34289099Sfjoe ah->arc_seqid2 = ac->ac_seqid; 34389099Sfjoe } else { 34489099Sfjoe ac->curr_frag = 0; 34589099Sfjoe 346111119Simp M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT); 34789099Sfjoe if (m == 0) 34889099Sfjoe return 0; 34989099Sfjoe 35089099Sfjoe ah = mtod(m, struct arc_header *); 35189099Sfjoe ah->arc_flag = ac->sflag; 35289099Sfjoe ah->arc_seqid = ac->ac_seqid; 35389099Sfjoe } 35489099Sfjoe 35589099Sfjoe ah->arc_dhost = ac->arc_dhost; 35689099Sfjoe ah->arc_shost = ac->arc_shost; 35789099Sfjoe ah->arc_type = ac->arc_type; 35889099Sfjoe 35989099Sfjoe return m; 36089099Sfjoe} 36189099Sfjoe 36289099Sfjoe/* 36389099Sfjoe * Defragmenter. Returns mbuf if last packet found, else 36489099Sfjoe * NULL. frees imcoming mbuf as necessary. 36589099Sfjoe */ 36689099Sfjoe 367105228Sphkstatic __inline struct mbuf * 36889099Sfjoearc_defrag(ifp, m) 36989099Sfjoe struct ifnet *ifp; 37089099Sfjoe struct mbuf *m; 37189099Sfjoe{ 37289099Sfjoe struct arc_header *ah, *ah1; 37389099Sfjoe struct arccom *ac; 37489099Sfjoe struct ac_frag *af; 37589099Sfjoe struct mbuf *m1; 37689099Sfjoe char *s; 37789099Sfjoe int newflen; 37889099Sfjoe u_char src,dst,typ; 37989099Sfjoe 38089099Sfjoe ac = (struct arccom *)ifp; 38189099Sfjoe 38289099Sfjoe if (m->m_len < ARC_HDRNEWLEN) { 38389099Sfjoe m = m_pullup(m, ARC_HDRNEWLEN); 38489099Sfjoe if (m == NULL) { 38589099Sfjoe ++ifp->if_ierrors; 38689099Sfjoe return NULL; 38789099Sfjoe } 38889099Sfjoe } 38989099Sfjoe 39089099Sfjoe ah = mtod(m, struct arc_header *); 39189099Sfjoe typ = ah->arc_type; 39289099Sfjoe 39389099Sfjoe if (!arc_isphds(typ)) 39489099Sfjoe return m; 39589099Sfjoe 39689099Sfjoe src = ah->arc_shost; 39789099Sfjoe dst = ah->arc_dhost; 39889099Sfjoe 39989099Sfjoe if (ah->arc_flag == 0xff) { 40089099Sfjoe m_adj(m, 4); 40189099Sfjoe 40289099Sfjoe if (m->m_len < ARC_HDRNEWLEN) { 40389099Sfjoe m = m_pullup(m, ARC_HDRNEWLEN); 40489099Sfjoe if (m == NULL) { 40589099Sfjoe ++ifp->if_ierrors; 40689099Sfjoe return NULL; 40789099Sfjoe } 40889099Sfjoe } 40989099Sfjoe 41089099Sfjoe ah = mtod(m, struct arc_header *); 41189099Sfjoe } 41289099Sfjoe 41389099Sfjoe af = &ac->ac_fragtab[src]; 41489099Sfjoe m1 = af->af_packet; 41589099Sfjoe s = "debug code error"; 41689099Sfjoe 41789099Sfjoe if (ah->arc_flag & 1) { 41889099Sfjoe /* 41989099Sfjoe * first fragment. We always initialize, which is 42089099Sfjoe * about the right thing to do, as we only want to 42189099Sfjoe * accept one fragmented packet per src at a time. 42289099Sfjoe */ 42389099Sfjoe if (m1 != NULL) 42489099Sfjoe m_freem(m1); 42589099Sfjoe 42689099Sfjoe af->af_packet = m; 42789099Sfjoe m1 = m; 42889099Sfjoe af->af_maxflag = ah->arc_flag; 42989099Sfjoe af->af_lastseen = 0; 43089099Sfjoe af->af_seqid = ah->arc_seqid; 43189099Sfjoe 43289099Sfjoe return NULL; 43389099Sfjoe /* notreached */ 43489099Sfjoe } else { 43589099Sfjoe /* check for unfragmented packet */ 43689099Sfjoe if (ah->arc_flag == 0) 43789099Sfjoe return m; 43889099Sfjoe 43989099Sfjoe /* do we have a first packet from that src? */ 44089099Sfjoe if (m1 == NULL) { 44189099Sfjoe s = "no first frag"; 44289099Sfjoe goto outofseq; 44389099Sfjoe } 44489099Sfjoe 44589099Sfjoe ah1 = mtod(m1, struct arc_header *); 44689099Sfjoe 44789099Sfjoe if (ah->arc_seqid != ah1->arc_seqid) { 44889099Sfjoe s = "seqid differs"; 44989099Sfjoe goto outofseq; 45089099Sfjoe } 45189099Sfjoe 45289099Sfjoe if (typ != ah1->arc_type) { 45389099Sfjoe s = "type differs"; 45489099Sfjoe goto outofseq; 45589099Sfjoe } 45689099Sfjoe 45789099Sfjoe if (dst != ah1->arc_dhost) { 45889099Sfjoe s = "dest host differs"; 45989099Sfjoe goto outofseq; 46089099Sfjoe } 46189099Sfjoe 46289099Sfjoe /* typ, seqid and dst are ok here. */ 46389099Sfjoe 46489099Sfjoe if (ah->arc_flag == af->af_lastseen) { 46589099Sfjoe m_freem(m); 46689099Sfjoe return NULL; 46789099Sfjoe } 46889099Sfjoe 46989099Sfjoe if (ah->arc_flag == af->af_lastseen + 2) { 47089099Sfjoe /* ok, this is next fragment */ 47189099Sfjoe af->af_lastseen = ah->arc_flag; 47289099Sfjoe m_adj(m,ARC_HDRNEWLEN); 47389099Sfjoe 47489099Sfjoe /* 47589099Sfjoe * m_cat might free the first mbuf (with pkthdr) 47689099Sfjoe * in 2nd chain; therefore: 47789099Sfjoe */ 47889099Sfjoe 47989099Sfjoe newflen = m->m_pkthdr.len; 48089099Sfjoe 48189099Sfjoe m_cat(m1,m); 48289099Sfjoe 48389099Sfjoe m1->m_pkthdr.len += newflen; 48489099Sfjoe 48589099Sfjoe /* is it the last one? */ 48689099Sfjoe if (af->af_lastseen > af->af_maxflag) { 48789099Sfjoe af->af_packet = NULL; 48889099Sfjoe return(m1); 48989099Sfjoe } else 49089099Sfjoe return NULL; 49189099Sfjoe } 49289099Sfjoe s = "other reason"; 49389099Sfjoe /* if all else fails, it is out of sequence, too */ 49489099Sfjoe } 49589099Sfjoeoutofseq: 49689099Sfjoe if (m1) { 49789099Sfjoe m_freem(m1); 49889099Sfjoe af->af_packet = NULL; 49989099Sfjoe } 50089099Sfjoe 50189099Sfjoe if (m) 50289099Sfjoe m_freem(m); 50389099Sfjoe 504121816Sbrooks log(LOG_INFO,"%s: got out of seq. packet: %s\n", 505121816Sbrooks ifp->if_xname, s); 50689099Sfjoe 50789099Sfjoe return NULL; 50889099Sfjoe} 50989099Sfjoe 51089099Sfjoe/* 51189099Sfjoe * return 1 if Packet Header Definition Standard, else 0. 51289099Sfjoe * For now: old IP, old ARP aren't obviously. Lacking correct information, 51389099Sfjoe * we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS. 51489099Sfjoe * (Apple and Novell corporations were involved, among others, in PHDS work). 51589099Sfjoe * Easiest is to assume that everybody else uses that, too. 51689099Sfjoe */ 51789099Sfjoeint 51889099Sfjoearc_isphds(type) 51989099Sfjoe u_int8_t type; 52089099Sfjoe{ 52189099Sfjoe return (type != ARCTYPE_IP_OLD && 52289099Sfjoe type != ARCTYPE_ARP_OLD && 52389099Sfjoe type != ARCTYPE_DIAGNOSE); 52489099Sfjoe} 52589099Sfjoe 52689099Sfjoe/* 52789099Sfjoe * Process a received Arcnet packet; 52889099Sfjoe * the packet is in the mbuf chain m with 52989099Sfjoe * the ARCnet header. 53089099Sfjoe */ 53189099Sfjoevoid 53289099Sfjoearc_input(ifp, m) 53389099Sfjoe struct ifnet *ifp; 53489099Sfjoe struct mbuf *m; 53589099Sfjoe{ 53689099Sfjoe struct arc_header *ah; 537111888Sjlemon int isr; 53889099Sfjoe u_int8_t atype; 53989099Sfjoe 54089099Sfjoe if ((ifp->if_flags & IFF_UP) == 0) { 54189099Sfjoe m_freem(m); 54289099Sfjoe return; 54389099Sfjoe } 54489099Sfjoe 54589099Sfjoe /* possibly defragment: */ 54689099Sfjoe m = arc_defrag(ifp, m); 54789099Sfjoe if (m == NULL) 54889099Sfjoe return; 54989099Sfjoe 550106939Ssam BPF_MTAP(ifp, m); 55189099Sfjoe 55289099Sfjoe ah = mtod(m, struct arc_header *); 553109771Sfjoe /* does this belong to us? */ 554110106Sfjoe if ((ifp->if_flags & IFF_PROMISC) == 0 555109771Sfjoe && ah->arc_dhost != arcbroadcastaddr 556110106Sfjoe && ah->arc_dhost != ARC_LLADDR(ifp)) { 557109771Sfjoe m_freem(m); 558109771Sfjoe return; 559109771Sfjoe } 56089099Sfjoe 56189099Sfjoe ifp->if_ibytes += m->m_pkthdr.len; 56289099Sfjoe 563109771Sfjoe if (ah->arc_dhost == arcbroadcastaddr) { 56489099Sfjoe m->m_flags |= M_BCAST|M_MCAST; 56589099Sfjoe ifp->if_imcasts++; 56689099Sfjoe } 56789099Sfjoe 56889099Sfjoe atype = ah->arc_type; 56989099Sfjoe switch (atype) { 57089099Sfjoe#ifdef INET 57189099Sfjoe case ARCTYPE_IP: 57289099Sfjoe m_adj(m, ARC_HDRNEWLEN); 573122702Sandre if (ip_fastforward(m)) 574109771Sfjoe return; 575111888Sjlemon isr = NETISR_IP; 57689099Sfjoe break; 57789099Sfjoe 57889099Sfjoe case ARCTYPE_IP_OLD: 57989099Sfjoe m_adj(m, ARC_HDRLEN); 580122702Sandre if (ip_fastforward(m)) 581109771Sfjoe return; 582111888Sjlemon isr = NETISR_IP; 58389099Sfjoe break; 58489099Sfjoe 58589099Sfjoe case ARCTYPE_ARP: 58689099Sfjoe if (ifp->if_flags & IFF_NOARP) { 58789099Sfjoe /* Discard packet if ARP is disabled on interface */ 58889099Sfjoe m_freem(m); 58989099Sfjoe return; 59089099Sfjoe } 59189099Sfjoe m_adj(m, ARC_HDRNEWLEN); 592111888Sjlemon isr = NETISR_ARP; 59389099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 59489099Sfjoe mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP); 59589099Sfjoe#endif 59689099Sfjoe break; 59789099Sfjoe 59889099Sfjoe case ARCTYPE_ARP_OLD: 59989099Sfjoe if (ifp->if_flags & IFF_NOARP) { 60089099Sfjoe /* Discard packet if ARP is disabled on interface */ 60189099Sfjoe m_freem(m); 60289099Sfjoe return; 60389099Sfjoe } 60489099Sfjoe m_adj(m, ARC_HDRLEN); 605111888Sjlemon isr = NETISR_ARP; 60689099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 60789099Sfjoe mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP); 60889099Sfjoe#endif 60989099Sfjoe break; 61089099Sfjoe#endif 61189099Sfjoe#ifdef INET6 61289099Sfjoe case ARCTYPE_INET6: 61389099Sfjoe m_adj(m, ARC_HDRNEWLEN); 614111888Sjlemon isr = NETISR_IPV6; 61589099Sfjoe break; 61689099Sfjoe#endif 617109771Sfjoe#ifdef IPX 618109771Sfjoe case ARCTYPE_IPX: 619109771Sfjoe m_adj(m, ARC_HDRNEWLEN); 620111888Sjlemon isr = NETISR_IPX; 621109771Sfjoe break; 622109771Sfjoe#endif 62389099Sfjoe default: 62489099Sfjoe m_freem(m); 62589099Sfjoe return; 62689099Sfjoe } 627111888Sjlemon netisr_dispatch(isr, m); 62889099Sfjoe} 62989099Sfjoe 63089099Sfjoe/* 63189099Sfjoe * Register (new) link level address. 63289099Sfjoe */ 63389099Sfjoevoid 63489099Sfjoearc_storelladdr(ifp, lla) 63589099Sfjoe struct ifnet *ifp; 63689099Sfjoe u_int8_t lla; 63789099Sfjoe{ 638110106Sfjoe ARC_LLADDR(ifp) = lla; 63989099Sfjoe} 64089099Sfjoe 64189099Sfjoe/* 64289099Sfjoe * Perform common duties while attaching to interface list 64389099Sfjoe */ 64489099Sfjoevoid 64589099Sfjoearc_ifattach(ifp, lla) 64689099Sfjoe struct ifnet *ifp; 64789099Sfjoe u_int8_t lla; 64889099Sfjoe{ 64989099Sfjoe struct ifaddr *ifa; 65089099Sfjoe struct sockaddr_dl *sdl; 65189099Sfjoe struct arccom *ac; 65289099Sfjoe 65389099Sfjoe if_attach(ifp); 65489099Sfjoe ifp->if_type = IFT_ARCNET; 65589099Sfjoe ifp->if_addrlen = 1; 65689099Sfjoe ifp->if_hdrlen = ARC_HDRLEN; 65789099Sfjoe ifp->if_mtu = 1500; 658109771Sfjoe ifp->if_resolvemulti = arc_resolvemulti; 65989099Sfjoe if (ifp->if_baudrate == 0) 66089099Sfjoe ifp->if_baudrate = 2500000; 66189099Sfjoe#if __FreeBSD_version < 500000 66289099Sfjoe ifa = ifnet_addrs[ifp->if_index - 1]; 66389099Sfjoe#else 66489099Sfjoe ifa = ifaddr_byindex(ifp->if_index); 66589099Sfjoe#endif 66689099Sfjoe KASSERT(ifa != NULL, ("%s: no lladdr!\n", __FUNCTION__)); 66789099Sfjoe sdl = (struct sockaddr_dl *)ifa->ifa_addr; 66889099Sfjoe sdl->sdl_type = IFT_ARCNET; 66989099Sfjoe sdl->sdl_alen = ifp->if_addrlen; 67089099Sfjoe 67189099Sfjoe if (ifp->if_flags & IFF_BROADCAST) 67289099Sfjoe ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI; 67389099Sfjoe 67489099Sfjoe ac = (struct arccom *)ifp; 67589099Sfjoe ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */ 67689099Sfjoe if (lla == 0) { 67789099Sfjoe /* XXX this message isn't entirely clear, to me -- cgd */ 678121816Sbrooks log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n", 679121816Sbrooks ifp->if_xname, ifp->if_xname); 68089099Sfjoe } 68189099Sfjoe arc_storelladdr(ifp, lla); 68289099Sfjoe 68389099Sfjoe ifp->if_broadcastaddr = &arcbroadcastaddr; 68489099Sfjoe 68589099Sfjoe bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN); 68689099Sfjoe} 68789099Sfjoe 68889099Sfjoevoid 68989099Sfjoearc_ifdetach(ifp) 69089099Sfjoe struct ifnet *ifp; 69189099Sfjoe{ 69289099Sfjoe bpfdetach(ifp); 69389099Sfjoe if_detach(ifp); 69489099Sfjoe} 69589099Sfjoe 69689099Sfjoeint 69789099Sfjoearc_ioctl(ifp, command, data) 69889099Sfjoe struct ifnet *ifp; 69989099Sfjoe int command; 70089099Sfjoe caddr_t data; 70189099Sfjoe{ 70289099Sfjoe struct ifaddr *ifa = (struct ifaddr *) data; 70389099Sfjoe struct ifreq *ifr = (struct ifreq *) data; 70489099Sfjoe int error = 0; 70589099Sfjoe 70689099Sfjoe switch (command) { 70789099Sfjoe case SIOCSIFADDR: 70889099Sfjoe ifp->if_flags |= IFF_UP; 70989099Sfjoe switch (ifa->ifa_addr->sa_family) { 71089099Sfjoe#ifdef INET 71189099Sfjoe case AF_INET: 71289099Sfjoe ifp->if_init(ifp->if_softc); /* before arpwhohas */ 71389099Sfjoe arp_ifinit(ifp, ifa); 71489099Sfjoe break; 71589099Sfjoe#endif 716109771Sfjoe#ifdef IPX 717109771Sfjoe /* 718109771Sfjoe * XXX This code is probably wrong 719109771Sfjoe */ 720109771Sfjoe case AF_IPX: 721109771Sfjoe { 722109771Sfjoe struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 723109771Sfjoe 724109771Sfjoe if (ipx_nullhost(*ina)) 725110106Sfjoe ina->x_host.c_host[5] = ARC_LLADDR(ifp); 726109771Sfjoe else 727109771Sfjoe arc_storelladdr(ifp, ina->x_host.c_host[5]); 728109771Sfjoe 729109771Sfjoe /* 730109771Sfjoe * Set new address 731109771Sfjoe */ 732109771Sfjoe ifp->if_init(ifp->if_softc); 733109771Sfjoe break; 734109771Sfjoe } 735109771Sfjoe#endif 73689099Sfjoe default: 73789099Sfjoe ifp->if_init(ifp->if_softc); 73889099Sfjoe break; 73989099Sfjoe } 74089099Sfjoe break; 74189099Sfjoe 742109771Sfjoe case SIOCGIFADDR: 743109771Sfjoe { 744109771Sfjoe struct sockaddr *sa; 745109771Sfjoe 746109771Sfjoe sa = (struct sockaddr *) &ifr->ifr_data; 747110106Sfjoe *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp); 748109771Sfjoe } 749109771Sfjoe break; 750109771Sfjoe 75189099Sfjoe case SIOCADDMULTI: 75289099Sfjoe case SIOCDELMULTI: 75389099Sfjoe if (ifr == NULL) 75489099Sfjoe error = EAFNOSUPPORT; 75589099Sfjoe else { 75689099Sfjoe switch (ifr->ifr_addr.sa_family) { 75789099Sfjoe case AF_INET: 75889099Sfjoe case AF_INET6: 75989099Sfjoe error = 0; 76089099Sfjoe break; 76189099Sfjoe default: 76289099Sfjoe error = EAFNOSUPPORT; 76389099Sfjoe break; 76489099Sfjoe } 76589099Sfjoe } 76689099Sfjoe break; 76789099Sfjoe 76889099Sfjoe case SIOCSIFMTU: 76989099Sfjoe /* 77089099Sfjoe * Set the interface MTU. 77189099Sfjoe * mtu can't be larger than ARCMTU for RFC1051 77289099Sfjoe * and can't be larger than ARC_PHDS_MTU 77389099Sfjoe */ 77489099Sfjoe if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) || 77589099Sfjoe ifr->ifr_mtu > ARC_PHDS_MAXMTU) 77689099Sfjoe error = EINVAL; 77789099Sfjoe else 77889099Sfjoe ifp->if_mtu = ifr->ifr_mtu; 77989099Sfjoe break; 780109771Sfjoe } 78189099Sfjoe 782109771Sfjoe return (error); 783109771Sfjoe} 78489099Sfjoe 785109771Sfjoe/* based on ether_resolvemulti() */ 786109771Sfjoeint 787109771Sfjoearc_resolvemulti(ifp, llsa, sa) 788109771Sfjoe struct ifnet *ifp; 789109771Sfjoe struct sockaddr **llsa; 790109771Sfjoe struct sockaddr *sa; 791109771Sfjoe{ 792109771Sfjoe struct sockaddr_dl *sdl; 793109771Sfjoe struct sockaddr_in *sin; 794109771Sfjoe#ifdef INET6 795109771Sfjoe struct sockaddr_in6 *sin6; 796109771Sfjoe#endif 797109771Sfjoe 798109771Sfjoe switch(sa->sa_family) { 799109771Sfjoe case AF_LINK: 800109771Sfjoe /* 801109771Sfjoe * No mapping needed. Just check that it's a valid MC address. 802109771Sfjoe */ 803109771Sfjoe sdl = (struct sockaddr_dl *)sa; 804109771Sfjoe if (*LLADDR(sdl) != arcbroadcastaddr) 805109771Sfjoe return EADDRNOTAVAIL; 806109771Sfjoe *llsa = 0; 807109771Sfjoe return 0; 808109771Sfjoe#ifdef INET 809109771Sfjoe case AF_INET: 810109771Sfjoe sin = (struct sockaddr_in *)sa; 811109771Sfjoe if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 812109771Sfjoe return EADDRNOTAVAIL; 813109771Sfjoe MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 814109771Sfjoe M_ZERO); 815109771Sfjoe sdl->sdl_len = sizeof *sdl; 816109771Sfjoe sdl->sdl_family = AF_LINK; 817109771Sfjoe sdl->sdl_index = ifp->if_index; 818109771Sfjoe sdl->sdl_type = IFT_ARCNET; 819109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 820109771Sfjoe *LLADDR(sdl) = 0; 821109771Sfjoe *llsa = (struct sockaddr *)sdl; 822109771Sfjoe return 0; 823109771Sfjoe#endif 824109771Sfjoe#ifdef INET6 825109771Sfjoe case AF_INET6: 826109771Sfjoe sin6 = (struct sockaddr_in6 *)sa; 827109771Sfjoe if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 828109771Sfjoe /* 829109771Sfjoe * An IP6 address of 0 means listen to all 830109771Sfjoe * of the Ethernet multicast address used for IP6. 831109771Sfjoe * (This is used for multicast routers.) 832109771Sfjoe */ 833109771Sfjoe ifp->if_flags |= IFF_ALLMULTI; 834109771Sfjoe *llsa = 0; 835109771Sfjoe return 0; 83689099Sfjoe } 837109771Sfjoe if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 838109771Sfjoe return EADDRNOTAVAIL; 839109771Sfjoe MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, 840109771Sfjoe M_ZERO); 841109771Sfjoe sdl->sdl_len = sizeof *sdl; 842109771Sfjoe sdl->sdl_family = AF_LINK; 843109771Sfjoe sdl->sdl_index = ifp->if_index; 844109771Sfjoe sdl->sdl_type = IFT_ARCNET; 845109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 846109771Sfjoe *LLADDR(sdl) = 0; 847109771Sfjoe *llsa = (struct sockaddr *)sdl; 848109771Sfjoe return 0; 84989099Sfjoe#endif 850109771Sfjoe 851109771Sfjoe default: 852109771Sfjoe /* 853109771Sfjoe * Well, the text isn't quite right, but it's the name 854109771Sfjoe * that counts... 855109771Sfjoe */ 856109771Sfjoe return EAFNOSUPPORT; 85789099Sfjoe } 85889099Sfjoe} 859