/* $NetBSD: if_tokensubr.c,v 1.45 2007/02/17 22:34:09 dyoung Exp $ */ /* * Copyright (c) 1982, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. 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: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp */ /* * Copyright (c) 1997-1999 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Onno van der Linden. * * 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 NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. */ /* * Copyright (c) 1995 * Matt Thomas. 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. The names of its contributors may not 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: NetBSD: if_fddisubr.c,v 1.2 1995/08/19 04:35:29 cgd Exp */ #include __KERNEL_RCSID(0, "$NetBSD: if_tokensubr.c,v 1.45 2007/02/17 22:34:09 dyoung Exp $"); #include "opt_inet.h" #include "opt_atalk.h" #include "opt_iso.h" #include "opt_gateway.h" #include "bpfilter.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if NBPFILTER > 0 #include #endif #include #include #include "carp.h" #if NCARP > 0 #include #endif #ifdef INET #include #include #include #endif #ifdef DECNET #include #endif #ifdef ISO #include #include #include #include #endif #include "bpfilter.h" #define senderr(e) { error = (e); goto bad;} #if defined(__bsdi__) || defined(__NetBSD__) #define RTALLOC1(a, b) rtalloc1(a, b) #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e) #define TYPEHTONS(t) (t) #elif defined(__FreeBSD__) #define RTALLOC1(a, b) rtalloc1(a, b, 0UL) #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e, f) #define TYPEHTONS(t) (htons(t)) #endif #define RCF_ALLROUTES (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_ALL #define RCF_SINGLEROUTE (2 << 8) | TOKEN_RCF_FRAME2 | TOKEN_RCF_BROADCAST_SINGLE static int token_output(struct ifnet *, struct mbuf *, const struct sockaddr *, struct rtentry *); static void token_input(struct ifnet *, struct mbuf *); /* * Token Ring output routine. * Encapsulate a packet of type family for the local net. * Assumes that ifp is actually pointer to arphdr structure. * XXX route info has to go into the same mbuf as the header */ static int token_output(struct ifnet *ifp0, struct mbuf *m0, const struct sockaddr *dst, struct rtentry *rt0) { u_int16_t etype; int error = 0; u_char edst[ISO88025_ADDR_LEN]; struct mbuf *m = m0; struct rtentry *rt; struct mbuf *mcopy = (struct mbuf *)0; struct token_header *trh; #ifdef INET struct arphdr *ah = (struct arphdr *)ifp0; #endif /* INET */ struct token_rif *rif = (struct token_rif *)0; struct token_rif bcastrif; struct ifnet *ifp = ifp0; size_t riflen = 0; ALTQ_DECL(struct altq_pktattr pktattr;) #if NCARP > 0 if (ifp->if_type == IFT_CARP) { struct ifaddr *ifa; /* loop back if this is going to the carp interface */ if (dst != NULL && ifp0->if_link_state == LINK_STATE_UP && (ifa = ifa_ifwithaddr(dst)) != NULL && ifa->ifa_ifp == ifp0) return (looutput(ifp0, m, dst, rt0)); ifp = ifp->if_carpdev; ah = (struct arphdr *)ifp; if ((ifp0->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) senderr(ENETDOWN); } #endif /* NCARP > 0 */ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) senderr(ENETDOWN); if ((rt = rt0)) { if ((rt->rt_flags & RTF_UP) == 0) { if ((rt0 = rt = RTALLOC1(dst, 1))) rt->rt_refcnt--; else senderr(EHOSTUNREACH); } if (rt->rt_flags & RTF_GATEWAY) { if (rt->rt_gwroute == 0) goto lookup; if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) { rtfree(rt); rt = rt0; lookup: rt->rt_gwroute = RTALLOC1(rt->rt_gateway, 1); if ((rt = rt->rt_gwroute) == 0) senderr(EHOSTUNREACH); } } if (rt->rt_flags & RTF_REJECT) if (rt->rt_rmx.rmx_expire == 0 || time_second < rt->rt_rmx.rmx_expire) senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH); } /* * If the queueing discipline needs packet classification, * do it before prepending link headers. */ IFQ_CLASSIFY(&ifp->if_snd, m, dst->sa_family, &pktattr); switch (dst->sa_family) { #ifdef INET case AF_INET: if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(rif->tr_rcf); } memcpy(edst, tokenbroadcastaddr, sizeof(edst)); } /* * XXX m->m_flags & M_MCAST IEEE802_MAP_IP_MULTICAST ?? */ else { if (!ARPRESOLVE(ifp, rt, m, dst, edst, rt0)) return (0); /* if not yet resolved */ rif = TOKEN_RIF((struct llinfo_arp *) rt->rt_llinfo); riflen = (ntohs(rif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } /* If broadcasting on a simplex interface, loopback a copy. */ if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX)) mcopy = m_copy(m, 0, (int)M_COPYALL); etype = htons(ETHERTYPE_IP); break; case AF_ARP: /* * XXX source routing, assume m->m_data contains the useful stuff */ ah = mtod(m, struct arphdr *); ah->ar_hrd = htons(ARPHRD_IEEE802); switch (ntohs(ah->ar_op)) { case ARPOP_REVREQUEST: case ARPOP_REVREPLY: etype = htons(ETHERTYPE_REVARP); break; case ARPOP_REQUEST: case ARPOP_REPLY: default: etype = htons(ETHERTYPE_ARP); } if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(rif->tr_rcf); } memcpy(edst, tokenbroadcastaddr, sizeof(edst)); } else { caddr_t tha = (caddr_t)ar_tha(ah); KASSERT(tha); if (tha) bcopy(tha, (caddr_t)edst, sizeof(edst)); trh = (struct token_header *)M_TRHSTART(m); trh->token_ac = TOKEN_AC; trh->token_fc = TOKEN_FC; if (trh->token_shost[0] & TOKEN_RI_PRESENT) { struct token_rif *trrif; trrif = TOKEN_RIF(trh); riflen = (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof(trh->token_shost)); if (riflen != 0) trh->token_shost[0] |= TOKEN_RI_PRESENT; /* * compare (m->m_data - m->m_pktdat) with (sizeof(struct token_header) + riflen + ... */ m->m_len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); m->m_data -= (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); m->m_pkthdr.len += (sizeof(*trh) + riflen + LLC_SNAPFRAMELEN); goto send; } break; #endif #ifdef ISO case AF_ISO: { int snpalen; struct llc *l; struct sockaddr_dl *sdl; if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) && sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) { bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst)); } else if ((error = iso_snparesolve(ifp, (const struct sockaddr_iso *)dst, (char *)edst, &snpalen))) goto bad; /* Not resolved */ /* If broadcasting on a simplex interface, loopback a copy. */ if (*edst & 1) m->m_flags |= (M_BCAST|M_MCAST); if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) && (mcopy = m_copy(m, 0, (int)M_COPYALL))) { M_PREPEND(mcopy, sizeof (*trh), M_DONTWAIT); if (mcopy) { trh = mtod(mcopy, struct token_header *); bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof (edst)); } } M_PREPEND(m, 3, M_DONTWAIT); if (m == NULL) return (0); etype = 0; l = mtod(m, struct llc *); l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP; l->llc_control = LLC_UI; #if defined(__FreeBSD__) IFDEBUG(D_ETHER) int i; printf("token_output: sending pkt to: "); for (i=0; i < ISO88025_ADDR_LEN; i++) printf("%x ", edst[i] & 0xff); printf("\n"); ENDDEBUG #endif } break; #endif /* ISO */ case AF_UNSPEC: { const struct ether_header *eh; eh = (const struct ether_header *)dst->sa_data; memcpy(edst, eh->ether_dhost, sizeof(edst)); if (*edst & 1) m->m_flags |= (M_BCAST|M_MCAST); etype = TYPEHTONS(eh->ether_type); if (m->m_flags & M_BCAST) { if (ifp->if_flags & IFF_LINK0) { if (ifp->if_flags & IFF_LINK1) bcastrif.tr_rcf = htons(RCF_ALLROUTES); else bcastrif.tr_rcf = htons(RCF_SINGLEROUTE); rif = &bcastrif; riflen = sizeof(bcastrif.tr_rcf); } } break; } default: printf("%s: can't handle af%d\n", ifp->if_xname, dst->sa_family); senderr(EAFNOSUPPORT); } if (mcopy) (void) looutput(ifp, mcopy, dst, rt); if (etype != 0) { struct llc *l; M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT); if (m == 0) senderr(ENOBUFS); l = mtod(m, struct llc *); l->llc_control = LLC_UI; l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP; l->llc_snap.org_code[0] = l->llc_snap.org_code[1] = l->llc_snap.org_code[2] = 0; bcopy((caddr_t) &etype, (caddr_t) &l->llc_snap.ether_type, sizeof(u_int16_t)); } /* * Add local net header. If no space in first mbuf, * allocate another. */ M_PREPEND(m, (riflen + sizeof (*trh)), M_DONTWAIT); if (m == 0) senderr(ENOBUFS); trh = mtod(m, struct token_header *); trh->token_ac = TOKEN_AC; trh->token_fc = TOKEN_FC; bcopy((caddr_t)edst, (caddr_t)trh->token_dhost, sizeof (edst)); bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_shost, sizeof(trh->token_shost)); if (riflen != 0) { struct token_rif *trrif; trh->token_shost[0] |= TOKEN_RI_PRESENT; trrif = TOKEN_RIF(trh); bcopy(rif, trrif, riflen); } #ifdef INET send: #endif #if NCARP > 0 if (ifp0 != ifp && ifp0->if_type == IFT_CARP) { bcopy(LLADDR(ifp0->if_sadl), (caddr_t)trh->token_shost, sizeof(trh->token_shost)); } #endif /* NCARP > 0 */ return ifq_enqueue(ifp, m ALTQ_COMMA ALTQ_DECL(&pktattr)); bad: if (m) m_freem(m); return (error); } /* * Process a received token ring packet; * the packet is in the mbuf chain m with * the token ring header. */ static void token_input(struct ifnet *ifp, struct mbuf *m) { struct ifqueue *inq; struct llc *l; struct token_header *trh; int s, lan_hdr_len; if ((ifp->if_flags & IFF_UP) == 0) { m_freem(m); return; } trh = mtod(m, struct token_header *); ifp->if_ibytes += m->m_pkthdr.len; if (memcmp(tokenbroadcastaddr, trh->token_dhost, sizeof(tokenbroadcastaddr)) == 0) m->m_flags |= M_BCAST; else if (trh->token_dhost[0] & 1) m->m_flags |= M_MCAST; if (m->m_flags & (M_BCAST|M_MCAST)) ifp->if_imcasts++; /* Skip past the Token Ring header and RIF. */ lan_hdr_len = sizeof(struct token_header); if (trh->token_shost[0] & TOKEN_RI_PRESENT) { struct token_rif *trrif; trrif = TOKEN_RIF(trh); lan_hdr_len += (ntohs(trrif->tr_rcf) & TOKEN_RCF_LEN_MASK) >> 8; } l = (struct llc *)(mtod(m, u_int8_t *) + lan_hdr_len); switch (l->llc_dsap) { #if defined(INET) || defined(NS) || defined(DECNET) case LLC_SNAP_LSAP: { u_int16_t etype; if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) goto dropanyway; if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0 || l->llc_snap.org_code[2] != 0) goto dropanyway; etype = ntohs(l->llc_snap.ether_type); m_adj(m, lan_hdr_len + LLC_SNAPFRAMELEN); #if NCARP > 0 if (ifp->if_carp && ifp->if_type != IFT_CARP && (carp_input(m, (u_int8_t *)&trh->token_shost, (u_int8_t *)&trh->token_dhost, l->llc_snap.ether_type) == 0)) return; #endif /* NCARP > 0 */ switch (etype) { #ifdef INET case ETHERTYPE_IP: schednetisr(NETISR_IP); inq = &ipintrq; break; case ETHERTYPE_ARP: schednetisr(NETISR_ARP); inq = &arpintrq; break; #endif #ifdef DECNET case ETHERTYPE_DECNET: schednetisr(NETISR_DECNET); inq = &decnetintrq; break; #endif default: /* printf("token_input: unknown protocol 0x%x\n", etype); */ ifp->if_noproto++; goto dropanyway; } break; } #endif /* INET || NS || DECNET */ #ifdef ISO case LLC_ISO_LSAP: switch (l->llc_control) { case LLC_UI: /* LLC_UI_P forbidden in class 1 service */ if ((l->llc_dsap == LLC_ISO_LSAP) && (l->llc_ssap == LLC_ISO_LSAP)) { #if defined(__FreeBSD__) IFDEBUG(D_ETHER) printf("clnp packet"); ENDDEBUG #endif schednetisr(NETISR_ISO); inq = &clnlintrq; break; } goto dropanyway; case LLC_XID: case LLC_XID_P: if(m->m_len < LLC_XID_BASIC_MINLEN + lan_hdr_len) goto dropanyway; l->llc_window = 0; l->llc_fid = LLC_XID_FORMAT_BASIC; l->llc_class = LLC_XID_CLASS_I; l->llc_dsap = l->llc_ssap = 0; /* Fall through to */ case LLC_TEST: case LLC_TEST_P: { struct sockaddr sa; struct ether_header *eh; int i; u_char c = l->llc_dsap; l->llc_dsap = l->llc_ssap; l->llc_ssap = c; if (m->m_flags & (M_BCAST | M_MCAST)) bcopy(LLADDR(ifp->if_sadl), (caddr_t)trh->token_dhost, ISO88025_ADDR_LEN); sa.sa_family = AF_UNSPEC; sa.sa_len = sizeof(sa); eh = (struct ether_header *)sa.sa_data; for (i = 0; i < ISO88025_ADDR_LEN; i++) { eh->ether_shost[i] = c = trh->token_dhost[i]; eh->ether_dhost[i] = eh->ether_dhost[i] = trh->token_shost[i]; eh->ether_shost[i] = c; } eh->ether_type = 0; m_adj(m, lan_hdr_len); ifp->if_output(ifp, m, &sa, NULL); return; } default: m_freem(m); return; } break; #endif /* ISO */ default: /* printf("token_input: unknown dsap 0x%x\n", l->llc_dsap); */ ifp->if_noproto++; #if defined(INET) || defined(NS) || defined(DECNET) || defined(ISO) dropanyway: #endif m_freem(m); return; } s = splnet(); if (IF_QFULL(inq)) { IF_DROP(inq); m_freem(m); } else IF_ENQUEUE(inq, m); splx(s); } /* * Perform common duties while attaching to interface list */ void token_ifattach(struct ifnet *ifp, caddr_t lla) { ifp->if_type = IFT_ISO88025; ifp->if_addrlen = ISO88025_ADDR_LEN; ifp->if_hdrlen = 14; ifp->if_dlt = DLT_IEEE802; ifp->if_mtu = ISO88025_MTU; ifp->if_output = token_output; ifp->if_input = token_input; ifp->if_broadcastaddr = tokenbroadcastaddr; #ifdef IFF_NOTRAILERS ifp->if_flags |= IFF_NOTRAILERS; #endif if_alloc_sadl(ifp); memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen); #if NBPFILTER > 0 bpfattach(ifp, DLT_IEEE802, sizeof(struct token_header)); #endif } void token_ifdetach(struct ifnet *ifp) { #if NBPFILTER > 0 bpfdetach(ifp); #endif #if 0 /* done in if_detach() */ if_free_sadl(ifp); #endif }