if_arcsubr.c revision 249925
189099Sfjoe/* $NetBSD: if_arcsubr.c,v 1.36 2001/06/14 05:44:23 itojun Exp $ */ 289099Sfjoe/* $FreeBSD: head/sys/net/if_arcsubr.c 249925 2013-04-26 12:50:32Z glebius $ */ 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> 67186119Sqingli#include <net/if_llatbl.h> 6889099Sfjoe 6989099Sfjoe#if defined(INET) || defined(INET6) 7089099Sfjoe#include <netinet/in.h> 7189099Sfjoe#include <netinet/in_var.h> 7289099Sfjoe#include <netinet/if_ether.h> 7389099Sfjoe#endif 7489099Sfjoe 7589099Sfjoe#ifdef INET6 7689099Sfjoe#include <netinet6/nd6.h> 7789099Sfjoe#endif 7889099Sfjoe 79109771Sfjoe#ifdef IPX 80109771Sfjoe#include <netipx/ipx.h> 81109771Sfjoe#include <netipx/ipx_if.h> 82109771Sfjoe#endif 83109771Sfjoe 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;} 95249925Sglebius#define SIN(s) ((const struct sockaddr_in *)(s)) 96249925Sglebius#define SIPX(s) ((const 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 104249925Sglebiusarc_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst, 105191148Skmacy struct route *ro) 10689099Sfjoe{ 10789099Sfjoe struct arc_header *ah; 10889099Sfjoe int error; 10989099Sfjoe u_int8_t atype, adst; 110109771Sfjoe int loop_copy = 0; 111110106Sfjoe int isphds; 112193891Sbz#if defined(INET) || defined(INET6) 113186119Sqingli struct llentry *lle; 114193891Sbz#endif 11589099Sfjoe 116148887Srwatson if (!((ifp->if_flags & IFF_UP) && 117148887Srwatson (ifp->if_drv_flags & IFF_DRV_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 { 134191148Skmacy error = arpresolve(ifp, ro ? ro->ro_rt : NULL, 135191148Skmacy m, dst, &adst, &lle); 136128636Sluigi if (error) 137128636Sluigi return (error == EWOULDBLOCK ? 0 : error); 138128636Sluigi } 13989099Sfjoe 14089099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 14189099Sfjoe ARCTYPE_IP_OLD : ARCTYPE_IP; 14289099Sfjoe break; 143127260Smdodd case AF_ARP: 144127260Smdodd { 145127260Smdodd struct arphdr *ah; 146127260Smdodd ah = mtod(m, struct arphdr *); 147127260Smdodd ah->ar_hrd = htons(ARPHRD_ARCNET); 148127260Smdodd 149127260Smdodd loop_copy = -1; /* if this is for us, don't do it */ 150127260Smdodd 151127260Smdodd switch(ntohs(ah->ar_op)) { 152127260Smdodd case ARPOP_REVREQUEST: 153127260Smdodd case ARPOP_REVREPLY: 154127275Smdodd atype = ARCTYPE_REVARP; 155127260Smdodd break; 156127260Smdodd case ARPOP_REQUEST: 157127260Smdodd case ARPOP_REPLY: 158127260Smdodd default: 159127275Smdodd atype = ARCTYPE_ARP; 160127260Smdodd break; 161127260Smdodd } 162127260Smdodd 163127260Smdodd if (m->m_flags & M_BCAST) 164127290Smdodd bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN); 165127260Smdodd else 166127290Smdodd bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN); 167127260Smdodd 168127260Smdodd } 169127260Smdodd break; 17089099Sfjoe#endif 17189099Sfjoe#ifdef INET6 17289099Sfjoe case AF_INET6: 173186217Sqingli error = nd6_storelladdr(ifp, m, dst, (u_char *)&adst, &lle); 174128636Sluigi if (error) 175128636Sluigi return (error); 17689099Sfjoe atype = ARCTYPE_INET6; 17789099Sfjoe break; 17889099Sfjoe#endif 179109771Sfjoe#ifdef IPX 180109771Sfjoe case AF_IPX: 181109771Sfjoe adst = SIPX(dst)->sipx_addr.x_host.c_host[5]; 182109771Sfjoe atype = ARCTYPE_IPX; 183109771Sfjoe if (adst == 0xff) 184109771Sfjoe adst = arcbroadcastaddr; 185109771Sfjoe break; 186109771Sfjoe#endif 18789099Sfjoe 18889099Sfjoe case AF_UNSPEC: 189249925Sglebius { 190249925Sglebius const struct arc_header *ah; 191249925Sglebius 192109771Sfjoe loop_copy = -1; 193249925Sglebius ah = (const struct arc_header *)dst->sa_data; 19489099Sfjoe adst = ah->arc_dhost; 19589099Sfjoe atype = ah->arc_type; 19689099Sfjoe 19789099Sfjoe if (atype == ARCTYPE_ARP) { 19889099Sfjoe atype = (ifp->if_flags & IFF_LINK0) ? 19989099Sfjoe ARCTYPE_ARP_OLD: ARCTYPE_ARP; 20089099Sfjoe 20189099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 20289099Sfjoe /* 20389099Sfjoe * XXX It's not clear per RFC826 if this is needed, but 20489099Sfjoe * "assigned numbers" say this is wrong. 20589099Sfjoe * However, e.g., AmiTCP 3.0Beta used it... we make this 20689099Sfjoe * switchable for emergency cases. Not perfect, but... 20789099Sfjoe */ 20889099Sfjoe if (ifp->if_flags & IFF_LINK2) 209109771Sfjoe mtod(m, struct arphdr *)->ar_pro = atype - 1; 21089099Sfjoe#endif 21189099Sfjoe } 21289099Sfjoe break; 213249925Sglebius } 21489099Sfjoe default: 215105598Sbrooks if_printf(ifp, "can't handle af%d\n", dst->sa_family); 21689099Sfjoe senderr(EAFNOSUPPORT); 21789099Sfjoe } 21889099Sfjoe 219110106Sfjoe isphds = arc_isphds(atype); 220243882Sglebius M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_NOWAIT); 22189099Sfjoe if (m == 0) 22289099Sfjoe senderr(ENOBUFS); 22389099Sfjoe ah = mtod(m, struct arc_header *); 22489099Sfjoe ah->arc_type = atype; 22589099Sfjoe ah->arc_dhost = adst; 226110106Sfjoe ah->arc_shost = ARC_LLADDR(ifp); 227110106Sfjoe if (isphds) { 228110106Sfjoe ah->arc_flag = 0; 229110106Sfjoe ah->arc_seqid = 0; 230110106Sfjoe } 23189099Sfjoe 232109771Sfjoe if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { 233109771Sfjoe if ((m->m_flags & M_BCAST) || (loop_copy > 0)) { 234109771Sfjoe struct mbuf *n = m_copy(m, 0, (int)M_COPYALL); 235109771Sfjoe 236109771Sfjoe (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN); 237109771Sfjoe } else if (ah->arc_dhost == ah->arc_shost) { 238109771Sfjoe (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN); 239109771Sfjoe return (0); /* XXX */ 240109771Sfjoe } 241109771Sfjoe } 242109771Sfjoe 243106939Ssam BPF_MTAP(ifp, m); 24489099Sfjoe 245191605Skmacy error = ifp->if_transmit(ifp, m); 24689099Sfjoe 24789099Sfjoe return (error); 24889099Sfjoe 24989099Sfjoebad: 25089099Sfjoe if (m) 25189099Sfjoe m_freem(m); 25289099Sfjoe return (error); 25389099Sfjoe} 25489099Sfjoe 25589099Sfjoevoid 256157681Srwatsonarc_frag_init(struct ifnet *ifp) 25789099Sfjoe{ 25889099Sfjoe struct arccom *ac; 25989099Sfjoe 260147256Sbrooks ac = (struct arccom *)ifp->if_l2com; 26189099Sfjoe ac->curr_frag = 0; 26289099Sfjoe} 26389099Sfjoe 26489099Sfjoestruct mbuf * 265157681Srwatsonarc_frag_next(struct ifnet *ifp) 26689099Sfjoe{ 26789099Sfjoe struct arccom *ac; 26889099Sfjoe struct mbuf *m; 26989099Sfjoe struct arc_header *ah; 27089099Sfjoe 271147256Sbrooks ac = (struct arccom *)ifp->if_l2com; 27289099Sfjoe if ((m = ac->curr_frag) == 0) { 27389099Sfjoe int tfrags; 27489099Sfjoe 27589099Sfjoe /* dequeue new packet */ 27689099Sfjoe IF_DEQUEUE(&ifp->if_snd, m); 27789099Sfjoe if (m == 0) 27889099Sfjoe return 0; 27989099Sfjoe 28089099Sfjoe ah = mtod(m, struct arc_header *); 28189099Sfjoe if (!arc_isphds(ah->arc_type)) 28289099Sfjoe return m; 28389099Sfjoe 28489099Sfjoe ++ac->ac_seqid; /* make the seqid unique */ 285109771Sfjoe tfrags = (m->m_pkthdr.len + ARC_MAX_DATA - 1) / ARC_MAX_DATA; 28689099Sfjoe ac->fsflag = 2 * tfrags - 3; 28789099Sfjoe ac->sflag = 0; 28889099Sfjoe ac->rsflag = ac->fsflag; 28989099Sfjoe ac->arc_dhost = ah->arc_dhost; 29089099Sfjoe ac->arc_shost = ah->arc_shost; 29189099Sfjoe ac->arc_type = ah->arc_type; 29289099Sfjoe 293110106Sfjoe m_adj(m, ARC_HDRNEWLEN); 29489099Sfjoe ac->curr_frag = m; 29589099Sfjoe } 29689099Sfjoe 29789099Sfjoe /* split out next fragment and return it */ 29889099Sfjoe if (ac->sflag < ac->fsflag) { 29989099Sfjoe /* we CAN'T have short packets here */ 300243882Sglebius ac->curr_frag = m_split(m, ARC_MAX_DATA, M_NOWAIT); 30189099Sfjoe if (ac->curr_frag == 0) { 30293750Sluigi m_freem(m); 30389099Sfjoe return 0; 30489099Sfjoe } 30589099Sfjoe 306243882Sglebius M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT); 30789099Sfjoe if (m == 0) { 30893750Sluigi m_freem(ac->curr_frag); 30989099Sfjoe ac->curr_frag = 0; 31089099Sfjoe return 0; 31189099Sfjoe } 31289099Sfjoe 31389099Sfjoe ah = mtod(m, struct arc_header *); 31489099Sfjoe ah->arc_flag = ac->rsflag; 31589099Sfjoe ah->arc_seqid = ac->ac_seqid; 31689099Sfjoe 31789099Sfjoe ac->sflag += 2; 31889099Sfjoe ac->rsflag = ac->sflag; 31989099Sfjoe } else if ((m->m_pkthdr.len >= 32089099Sfjoe ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) && 32189099Sfjoe (m->m_pkthdr.len <= 32289099Sfjoe ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) { 32389099Sfjoe ac->curr_frag = 0; 32489099Sfjoe 325243882Sglebius M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_NOWAIT); 32689099Sfjoe if (m == 0) 32789099Sfjoe return 0; 32889099Sfjoe 32989099Sfjoe ah = mtod(m, struct arc_header *); 33089099Sfjoe ah->arc_flag = 0xFF; 33189099Sfjoe ah->arc_seqid = 0xFFFF; 33289099Sfjoe ah->arc_type2 = ac->arc_type; 33389099Sfjoe ah->arc_flag2 = ac->sflag; 33489099Sfjoe ah->arc_seqid2 = ac->ac_seqid; 33589099Sfjoe } else { 33689099Sfjoe ac->curr_frag = 0; 33789099Sfjoe 338243882Sglebius M_PREPEND(m, ARC_HDRNEWLEN, M_NOWAIT); 33989099Sfjoe if (m == 0) 34089099Sfjoe return 0; 34189099Sfjoe 34289099Sfjoe ah = mtod(m, struct arc_header *); 34389099Sfjoe ah->arc_flag = ac->sflag; 34489099Sfjoe ah->arc_seqid = ac->ac_seqid; 34589099Sfjoe } 34689099Sfjoe 34789099Sfjoe ah->arc_dhost = ac->arc_dhost; 34889099Sfjoe ah->arc_shost = ac->arc_shost; 34989099Sfjoe ah->arc_type = ac->arc_type; 35089099Sfjoe 35189099Sfjoe return m; 35289099Sfjoe} 35389099Sfjoe 35489099Sfjoe/* 35589099Sfjoe * Defragmenter. Returns mbuf if last packet found, else 35689099Sfjoe * NULL. frees imcoming mbuf as necessary. 35789099Sfjoe */ 35889099Sfjoe 359105228Sphkstatic __inline struct mbuf * 360157681Srwatsonarc_defrag(struct ifnet *ifp, 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 370147256Sbrooks ac = (struct arccom *)ifp->if_l2com; 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 508157681Srwatsonarc_isphds(u_int8_t type) 50989099Sfjoe{ 51089099Sfjoe return (type != ARCTYPE_IP_OLD && 51189099Sfjoe type != ARCTYPE_ARP_OLD && 51289099Sfjoe type != ARCTYPE_DIAGNOSE); 51389099Sfjoe} 51489099Sfjoe 51589099Sfjoe/* 51689099Sfjoe * Process a received Arcnet packet; 51789099Sfjoe * the packet is in the mbuf chain m with 51889099Sfjoe * the ARCnet header. 51989099Sfjoe */ 52089099Sfjoevoid 521157681Srwatsonarc_input(struct ifnet *ifp, struct mbuf *m) 52289099Sfjoe{ 52389099Sfjoe struct arc_header *ah; 524111888Sjlemon int isr; 52589099Sfjoe u_int8_t atype; 52689099Sfjoe 52789099Sfjoe if ((ifp->if_flags & IFF_UP) == 0) { 52889099Sfjoe m_freem(m); 52989099Sfjoe return; 53089099Sfjoe } 53189099Sfjoe 53289099Sfjoe /* possibly defragment: */ 53389099Sfjoe m = arc_defrag(ifp, m); 53489099Sfjoe if (m == NULL) 53589099Sfjoe return; 53689099Sfjoe 537106939Ssam BPF_MTAP(ifp, m); 53889099Sfjoe 53989099Sfjoe ah = mtod(m, struct arc_header *); 540109771Sfjoe /* does this belong to us? */ 541110106Sfjoe if ((ifp->if_flags & IFF_PROMISC) == 0 542109771Sfjoe && ah->arc_dhost != arcbroadcastaddr 543110106Sfjoe && ah->arc_dhost != ARC_LLADDR(ifp)) { 544109771Sfjoe m_freem(m); 545109771Sfjoe return; 546109771Sfjoe } 54789099Sfjoe 54889099Sfjoe ifp->if_ibytes += m->m_pkthdr.len; 54989099Sfjoe 550109771Sfjoe if (ah->arc_dhost == arcbroadcastaddr) { 55189099Sfjoe m->m_flags |= M_BCAST|M_MCAST; 55289099Sfjoe ifp->if_imcasts++; 55389099Sfjoe } 55489099Sfjoe 55589099Sfjoe atype = ah->arc_type; 55689099Sfjoe switch (atype) { 55789099Sfjoe#ifdef INET 55889099Sfjoe case ARCTYPE_IP: 55989099Sfjoe m_adj(m, ARC_HDRNEWLEN); 560154518Sandre if ((m = ip_fastforward(m)) == NULL) 561109771Sfjoe return; 562111888Sjlemon isr = NETISR_IP; 56389099Sfjoe break; 56489099Sfjoe 56589099Sfjoe case ARCTYPE_IP_OLD: 56689099Sfjoe m_adj(m, ARC_HDRLEN); 567154518Sandre if ((m = ip_fastforward(m)) == NULL) 568109771Sfjoe return; 569111888Sjlemon isr = NETISR_IP; 57089099Sfjoe break; 57189099Sfjoe 57289099Sfjoe case ARCTYPE_ARP: 57389099Sfjoe if (ifp->if_flags & IFF_NOARP) { 57489099Sfjoe /* Discard packet if ARP is disabled on interface */ 57589099Sfjoe m_freem(m); 57689099Sfjoe return; 57789099Sfjoe } 57889099Sfjoe m_adj(m, ARC_HDRNEWLEN); 579111888Sjlemon isr = NETISR_ARP; 58089099Sfjoe#ifdef ARCNET_ALLOW_BROKEN_ARP 58189099Sfjoe mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP); 58289099Sfjoe#endif 58389099Sfjoe break; 58489099Sfjoe 58589099Sfjoe case ARCTYPE_ARP_OLD: 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_HDRLEN); 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#endif 59889099Sfjoe#ifdef INET6 59989099Sfjoe case ARCTYPE_INET6: 60089099Sfjoe m_adj(m, ARC_HDRNEWLEN); 601111888Sjlemon isr = NETISR_IPV6; 60289099Sfjoe break; 60389099Sfjoe#endif 604109771Sfjoe#ifdef IPX 605109771Sfjoe case ARCTYPE_IPX: 606109771Sfjoe m_adj(m, ARC_HDRNEWLEN); 607111888Sjlemon isr = NETISR_IPX; 608109771Sfjoe break; 609109771Sfjoe#endif 61089099Sfjoe default: 61189099Sfjoe m_freem(m); 61289099Sfjoe return; 61389099Sfjoe } 614223741Sbz M_SETFIB(m, ifp->if_fib); 615111888Sjlemon netisr_dispatch(isr, m); 61689099Sfjoe} 61789099Sfjoe 61889099Sfjoe/* 61989099Sfjoe * Register (new) link level address. 62089099Sfjoe */ 62189099Sfjoevoid 622157681Srwatsonarc_storelladdr(struct ifnet *ifp, u_int8_t lla) 62389099Sfjoe{ 624110106Sfjoe ARC_LLADDR(ifp) = lla; 62589099Sfjoe} 62689099Sfjoe 62789099Sfjoe/* 62889099Sfjoe * Perform common duties while attaching to interface list 62989099Sfjoe */ 63089099Sfjoevoid 631157681Srwatsonarc_ifattach(struct ifnet *ifp, u_int8_t lla) 63289099Sfjoe{ 63389099Sfjoe struct ifaddr *ifa; 63489099Sfjoe struct sockaddr_dl *sdl; 63589099Sfjoe struct arccom *ac; 63689099Sfjoe 63789099Sfjoe if_attach(ifp); 63889099Sfjoe ifp->if_addrlen = 1; 63989099Sfjoe ifp->if_hdrlen = ARC_HDRLEN; 64089099Sfjoe ifp->if_mtu = 1500; 641109771Sfjoe ifp->if_resolvemulti = arc_resolvemulti; 64289099Sfjoe if (ifp->if_baudrate == 0) 64389099Sfjoe ifp->if_baudrate = 2500000; 644152315Sru ifa = ifp->if_addr; 645135577Sstefanf KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__)); 64689099Sfjoe sdl = (struct sockaddr_dl *)ifa->ifa_addr; 64789099Sfjoe sdl->sdl_type = IFT_ARCNET; 64889099Sfjoe sdl->sdl_alen = ifp->if_addrlen; 64989099Sfjoe 65089099Sfjoe if (ifp->if_flags & IFF_BROADCAST) 65189099Sfjoe ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI; 65289099Sfjoe 653147256Sbrooks ac = (struct arccom *)ifp->if_l2com; 65489099Sfjoe ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */ 65589099Sfjoe if (lla == 0) { 65689099Sfjoe /* XXX this message isn't entirely clear, to me -- cgd */ 657121816Sbrooks log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n", 658121816Sbrooks ifp->if_xname, ifp->if_xname); 65989099Sfjoe } 66089099Sfjoe arc_storelladdr(ifp, lla); 66189099Sfjoe 66289099Sfjoe ifp->if_broadcastaddr = &arcbroadcastaddr; 66389099Sfjoe 66489099Sfjoe bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN); 66589099Sfjoe} 66689099Sfjoe 66789099Sfjoevoid 668157681Srwatsonarc_ifdetach(struct ifnet *ifp) 66989099Sfjoe{ 67089099Sfjoe bpfdetach(ifp); 67189099Sfjoe if_detach(ifp); 67289099Sfjoe} 67389099Sfjoe 67489099Sfjoeint 675194581Srdivackyarc_ioctl(struct ifnet *ifp, u_long command, caddr_t data) 67689099Sfjoe{ 67789099Sfjoe struct ifaddr *ifa = (struct ifaddr *) data; 67889099Sfjoe struct ifreq *ifr = (struct ifreq *) data; 67989099Sfjoe int error = 0; 68089099Sfjoe 68189099Sfjoe switch (command) { 68289099Sfjoe case SIOCSIFADDR: 68389099Sfjoe ifp->if_flags |= IFF_UP; 68489099Sfjoe switch (ifa->ifa_addr->sa_family) { 68589099Sfjoe#ifdef INET 68689099Sfjoe case AF_INET: 68789099Sfjoe ifp->if_init(ifp->if_softc); /* before arpwhohas */ 68889099Sfjoe arp_ifinit(ifp, ifa); 68989099Sfjoe break; 69089099Sfjoe#endif 691109771Sfjoe#ifdef IPX 692109771Sfjoe /* 693109771Sfjoe * XXX This code is probably wrong 694109771Sfjoe */ 695109771Sfjoe case AF_IPX: 696109771Sfjoe { 697109771Sfjoe struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr); 698109771Sfjoe 699109771Sfjoe if (ipx_nullhost(*ina)) 700110106Sfjoe ina->x_host.c_host[5] = ARC_LLADDR(ifp); 701109771Sfjoe else 702109771Sfjoe arc_storelladdr(ifp, ina->x_host.c_host[5]); 703109771Sfjoe 704109771Sfjoe /* 705109771Sfjoe * Set new address 706109771Sfjoe */ 707109771Sfjoe ifp->if_init(ifp->if_softc); 708109771Sfjoe break; 709109771Sfjoe } 710109771Sfjoe#endif 71189099Sfjoe default: 71289099Sfjoe ifp->if_init(ifp->if_softc); 71389099Sfjoe break; 71489099Sfjoe } 71589099Sfjoe break; 71689099Sfjoe 717109771Sfjoe case SIOCGIFADDR: 718109771Sfjoe { 719109771Sfjoe struct sockaddr *sa; 720109771Sfjoe 721109771Sfjoe sa = (struct sockaddr *) &ifr->ifr_data; 722110106Sfjoe *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp); 723109771Sfjoe } 724109771Sfjoe break; 725109771Sfjoe 72689099Sfjoe case SIOCADDMULTI: 72789099Sfjoe case SIOCDELMULTI: 72889099Sfjoe if (ifr == NULL) 72989099Sfjoe error = EAFNOSUPPORT; 73089099Sfjoe else { 73189099Sfjoe switch (ifr->ifr_addr.sa_family) { 73289099Sfjoe case AF_INET: 73389099Sfjoe case AF_INET6: 73489099Sfjoe error = 0; 73589099Sfjoe break; 73689099Sfjoe default: 73789099Sfjoe error = EAFNOSUPPORT; 73889099Sfjoe break; 73989099Sfjoe } 74089099Sfjoe } 74189099Sfjoe break; 74289099Sfjoe 74389099Sfjoe case SIOCSIFMTU: 74489099Sfjoe /* 74589099Sfjoe * Set the interface MTU. 74689099Sfjoe * mtu can't be larger than ARCMTU for RFC1051 74789099Sfjoe * and can't be larger than ARC_PHDS_MTU 74889099Sfjoe */ 74989099Sfjoe if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) || 75089099Sfjoe ifr->ifr_mtu > ARC_PHDS_MAXMTU) 75189099Sfjoe error = EINVAL; 75289099Sfjoe else 75389099Sfjoe ifp->if_mtu = ifr->ifr_mtu; 75489099Sfjoe break; 755109771Sfjoe } 75689099Sfjoe 757109771Sfjoe return (error); 758109771Sfjoe} 75989099Sfjoe 760109771Sfjoe/* based on ether_resolvemulti() */ 761109771Sfjoeint 762157681Srwatsonarc_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, 763157681Srwatson struct sockaddr *sa) 764109771Sfjoe{ 765109771Sfjoe struct sockaddr_dl *sdl; 766184680Sbz#ifdef INET 767109771Sfjoe struct sockaddr_in *sin; 768184680Sbz#endif 769109771Sfjoe#ifdef INET6 770109771Sfjoe struct sockaddr_in6 *sin6; 771109771Sfjoe#endif 772109771Sfjoe 773109771Sfjoe switch(sa->sa_family) { 774109771Sfjoe case AF_LINK: 775109771Sfjoe /* 776109771Sfjoe * No mapping needed. Just check that it's a valid MC address. 777109771Sfjoe */ 778109771Sfjoe sdl = (struct sockaddr_dl *)sa; 779109771Sfjoe if (*LLADDR(sdl) != arcbroadcastaddr) 780109771Sfjoe return EADDRNOTAVAIL; 781109771Sfjoe *llsa = 0; 782109771Sfjoe return 0; 783109771Sfjoe#ifdef INET 784109771Sfjoe case AF_INET: 785109771Sfjoe sin = (struct sockaddr_in *)sa; 786109771Sfjoe if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) 787109771Sfjoe return EADDRNOTAVAIL; 788184205Sdes sdl = malloc(sizeof *sdl, M_IFMADDR, 789148641Srwatson M_NOWAIT | M_ZERO); 790148641Srwatson if (sdl == NULL) 791148641Srwatson return ENOMEM; 792109771Sfjoe sdl->sdl_len = sizeof *sdl; 793109771Sfjoe sdl->sdl_family = AF_LINK; 794109771Sfjoe sdl->sdl_index = ifp->if_index; 795109771Sfjoe sdl->sdl_type = IFT_ARCNET; 796109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 797109771Sfjoe *LLADDR(sdl) = 0; 798109771Sfjoe *llsa = (struct sockaddr *)sdl; 799109771Sfjoe return 0; 800109771Sfjoe#endif 801109771Sfjoe#ifdef INET6 802109771Sfjoe case AF_INET6: 803109771Sfjoe sin6 = (struct sockaddr_in6 *)sa; 804109771Sfjoe if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { 805109771Sfjoe /* 806109771Sfjoe * An IP6 address of 0 means listen to all 807109771Sfjoe * of the Ethernet multicast address used for IP6. 808109771Sfjoe * (This is used for multicast routers.) 809109771Sfjoe */ 810109771Sfjoe ifp->if_flags |= IFF_ALLMULTI; 811109771Sfjoe *llsa = 0; 812109771Sfjoe return 0; 81389099Sfjoe } 814109771Sfjoe if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 815109771Sfjoe return EADDRNOTAVAIL; 816184205Sdes sdl = malloc(sizeof *sdl, M_IFMADDR, 817148641Srwatson M_NOWAIT | M_ZERO); 818148641Srwatson if (sdl == NULL) 819148641Srwatson return ENOMEM; 820109771Sfjoe sdl->sdl_len = sizeof *sdl; 821109771Sfjoe sdl->sdl_family = AF_LINK; 822109771Sfjoe sdl->sdl_index = ifp->if_index; 823109771Sfjoe sdl->sdl_type = IFT_ARCNET; 824109771Sfjoe sdl->sdl_alen = ARC_ADDR_LEN; 825109771Sfjoe *LLADDR(sdl) = 0; 826109771Sfjoe *llsa = (struct sockaddr *)sdl; 827109771Sfjoe return 0; 82889099Sfjoe#endif 829109771Sfjoe 830109771Sfjoe default: 831109771Sfjoe /* 832109771Sfjoe * Well, the text isn't quite right, but it's the name 833109771Sfjoe * that counts... 834109771Sfjoe */ 835109771Sfjoe return EAFNOSUPPORT; 83689099Sfjoe } 83789099Sfjoe} 838147256Sbrooks 839227293Sedstatic MALLOC_DEFINE(M_ARCCOM, "arccom", "ARCNET interface internals"); 840147256Sbrooks 841147256Sbrooksstatic void* 842147256Sbrooksarc_alloc(u_char type, struct ifnet *ifp) 843147256Sbrooks{ 844147256Sbrooks struct arccom *ac; 845147256Sbrooks 846147256Sbrooks ac = malloc(sizeof(struct arccom), M_ARCCOM, M_WAITOK | M_ZERO); 847147256Sbrooks ac->ac_ifp = ifp; 848147256Sbrooks 849147256Sbrooks return (ac); 850147256Sbrooks} 851147256Sbrooks 852147256Sbrooksstatic void 853147256Sbrooksarc_free(void *com, u_char type) 854147256Sbrooks{ 855147256Sbrooks 856147256Sbrooks free(com, M_ARCCOM); 857147256Sbrooks} 858147256Sbrooks 859147256Sbrooksstatic int 860147256Sbrooksarc_modevent(module_t mod, int type, void *data) 861147256Sbrooks{ 862147256Sbrooks 863147256Sbrooks switch (type) { 864147256Sbrooks case MOD_LOAD: 865147256Sbrooks if_register_com_alloc(IFT_ARCNET, arc_alloc, arc_free); 866147256Sbrooks break; 867147256Sbrooks case MOD_UNLOAD: 868147256Sbrooks if_deregister_com_alloc(IFT_ARCNET); 869147256Sbrooks break; 870147256Sbrooks default: 871147256Sbrooks return EOPNOTSUPP; 872147256Sbrooks } 873147256Sbrooks 874147256Sbrooks return (0); 875147256Sbrooks} 876147256Sbrooks 877147256Sbrooksstatic moduledata_t arc_mod = { 878147256Sbrooks "arcnet", 879147256Sbrooks arc_modevent, 880241394Skevlo 0 881147256Sbrooks}; 882147256Sbrooks 883147256SbrooksDECLARE_MODULE(arcnet, arc_mod, SI_SUB_INIT_IF, SI_ORDER_ANY); 884147256SbrooksMODULE_VERSION(arcnet, 1); 885