/* * Copyright (c) 1995, 1996 * Matt Thomas . All rights reserved. * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp * $FreeBSD: src/sys/net/if_fddisubr.c,v 1.41.2.8 2002/02/20 23:34:09 fjoe Exp $ * $DragonFly: src/sys/net/Attic/if_fddisubr.c,v 1.21 2006/01/14 11:05:17 swildner Exp $ */ #include "opt_atalk.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipx.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(INET) || defined(INET6) #include #include #include #include #endif #ifdef INET6 #include #endif #if defined(__DragonFly__) || defined(__FreeBSD__) #include #else #include #endif #ifdef IPX #include #include #endif #ifdef NS #include #include #endif #ifdef DECNET #include #endif #ifdef NETATALK #include #include #include #define llc_snap_org_code llc_un.type_snap.org_code #define llc_snap_ether_type llc_un.type_snap.ether_type extern u_char at_org_code[ 3 ]; extern u_char aarp_org_code[ 3 ]; #endif /* NETATALK */ static int fddi_resolvemulti (struct ifnet *, struct sockaddr **, struct sockaddr *); static void fddi_input(struct ifnet *, struct mbuf *); static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); #define senderr(e) { error = (e); goto bad;} /* * This really should be defined in if_llc.h but in case it isn't. */ #ifndef llc_snap #define llc_snap llc_un.type_snap #endif #if defined(__DragonFly__) #define RTALLOC1(a, b) _rtlookup(a, b, b ? RTL_DOCLONE : RTL_DONTCLONE) #define ARPRESOLVE(a, b, c, d, e, f) arpresolve(a, b, c, d, e) #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) #endif /* * FDDI output routine. * Encapsulate a packet of type family for the local net. * Use trailer local net encapsulation if enough data in first * packet leaves a multiple of 512 bytes of data in remainder. * Assumes that ifp is actually pointer to arpcom structure. */ static int fddi_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, struct rtentry *rt) { struct arpcom *ac = (struct arpcom *)ifp; u_int16_t type; u_char esrc[6], edst[6]; struct fddi_header *fh; boolean_t hdrcmplt = FALSE; int loop_copy = 0, error; struct altq_pktattr pktattr; if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) senderr(ENETDOWN); /* * 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 (!arpresolve(ifp, rt, m, dst, edst)) return (0); /* if not yet resolved */ type = htons(ETHERTYPE_IP); break; } #endif #ifdef INET6 case AF_INET6: if (!nd6_storelladdr(&ac->ac_if, rt, m, dst, (u_char *)edst)) { /* Something bad happened */ return (0); } type = htons(ETHERTYPE_IPV6); break; #endif #ifdef IPX case AF_IPX: type = htons(ETHERTYPE_IPX); bcopy(&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), edst, sizeof edst); break; #endif #ifdef NETATALK case AF_APPLETALK: { struct at_ifaddr *aa; if (!aarpresolve((struct arpcom *) ifp, m, (struct sockaddr_at *)dst, edst)) return (0); /* * ifaddr is the first thing in at_ifaddr */ if ((aa = at_ifawithnet((struct sockaddr_at *)dst)) == NULL) { error = 0; /* XXX */ goto bad; } /* * In the phase 2 case, we need to prepend an mbuf * for the llc header. Since we must preserve the * value of m, which is passed to us by value, we * m_copy() the first mbuf, and use it for our llc * header. */ if (aa->aa_flags & AFA_PHASE2) { struct llc llc; M_PREPEND(m, sizeof(struct llc), MB_WAIT); if (m == NULL) senderr(ENOBUFS); llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP; llc.llc_control = LLC_UI; bcopy(at_org_code, llc.llc_snap_org_code, sizeof at_org_code); llc.llc_snap_ether_type = htons(ETHERTYPE_AT); bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc)); type = 0; } else { type = htons(ETHERTYPE_AT); } break; } #endif /* NETATALK */ #ifdef NS case AF_NS: type = htons(ETHERTYPE_NS); bcopy(&(((struct sockaddr_ns *)dst)->sns_addr.x_host), edst, sizeof edst); break; #endif case pseudo_AF_HDRCMPLT: { struct ether_header *eh; hdrcmplt = TRUE; eh = (struct ether_header *)dst->sa_data; memcpy(esrc, eh->ether_shost, sizeof esrc); /* FALLTHROUGH */ } case AF_UNSPEC: { struct ether_header *eh; loop_copy = -1; eh = (struct ether_header *)dst->sa_data; memcpy(edst, eh->ether_dhost, sizeof edst); if (*edst & 1) m->m_flags |= (M_BCAST|M_MCAST); type = eh->ether_type; break; } case AF_IMPLINK: { fh = mtod(m, struct fddi_header *); error = EPROTONOSUPPORT; switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) { case FDDIFC_LLC_ASYNC: { /* legal priorities are 0 through 7 */ if ((fh->fddi_fc & FDDIFC_Z) > 7) goto bad; break; } case FDDIFC_LLC_SYNC: { /* FDDIFC_Z bits reserved, must be zero */ if (fh->fddi_fc & FDDIFC_Z) goto bad; break; } case FDDIFC_SMT: { /* FDDIFC_Z bits must be non zero */ if ((fh->fddi_fc & FDDIFC_Z) == 0) goto bad; break; } default: { /* anything else is too dangerous */ goto bad; } } error = 0; if (fh->fddi_dhost[0] & 1) m->m_flags |= (M_BCAST | M_MCAST); goto queue_it; } default: printf("%s: can't handle af%d\n", ifp->if_xname, dst->sa_family); senderr(EAFNOSUPPORT); } if (type != 0) { struct llc *l; M_PREPEND(m, sizeof(struct llc), MB_DONTWAIT); if (m == NULL) return (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; memcpy(&l->llc_snap.ether_type, &type, sizeof(u_int16_t)); } /* * Add local net header. If no space in first mbuf, * allocate another. */ M_PREPEND(m, sizeof(struct fddi_header), MB_DONTWAIT); if (m == NULL) return (ENOBUFS); fh = mtod(m, struct fddi_header *); fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; memcpy(fh->fddi_dhost, edst, sizeof edst); queue_it: if (hdrcmplt) memcpy(fh->fddi_shost, esrc, sizeof fh->fddi_shost); else memcpy(fh->fddi_shost, ac->ac_enaddr, sizeof fh->fddi_shost); /* memcpy(fh->fddi_shost, ac->ac_enaddr, sizeof fh->fddi_shost); * Ethernet address or a broadcast address, loopback a copy. * XXX To make a simplex device behave exactly like a duplex * device, we should copy in the case of sending to our own * ethernet address (thus letting the original actually appear * on the wire). However, we don't do that here for security * reasons and compatibility with the original behavior. */ if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) { if ((m->m_flags & M_BCAST) || loop_copy) { struct mbuf *n = m_copypacket(m, MB_DONTWAIT); if_simloop(ifp, n, dst->sa_family, sizeof(struct fddi_header)); } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, sizeof(fh->fddi_shost)) == 0) { if_simloop(ifp, m, dst->sa_family, sizeof(struct fddi_header)); senderr(0); /* XXX */ } } /* * Dispatch the message to the interface. */ return (ifq_handoff(ifp, m, &pktattr)); bad: m_freem(m); return (error); } /* * Process a received FDDI packet; * the packet is in the mbuf chain m without * the fddi header, which is provided separately. */ static void fddi_input(struct ifnet *ifp, struct mbuf *m) { int isr; struct llc *l; struct fddi_header *fh = mtod(m, struct fddi_header *); ASSERT_SERIALIZED(ifp->if_serializer); if (m->m_len < sizeof(struct fddi_header)) { /* XXX error in the caller. */ m_freem(m); return; } m_adj(m, sizeof(struct fddi_header)); m->m_pkthdr.rcvif = ifp; if (!(ifp->if_flags & IFF_UP)) { m_freem(m); return; } getmicrotime(&ifp->if_lastchange); ifp->if_ibytes += m->m_pkthdr.len + sizeof *fh; if (fh->fddi_dhost[0] & 1) { if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, ifp->if_addrlen) == 0) m->m_flags |= M_BCAST; else m->m_flags |= M_MCAST; ifp->if_imcasts++; } else if ((ifp->if_flags & IFF_PROMISC) && bcmp(((struct arpcom *)ifp)->ac_enaddr, fh->fddi_dhost, sizeof fh->fddi_dhost) != 0) { m_freem(m); return; } #ifdef M_LINK0 /* * If this has a LLC priority of 0, then mark it so upper * layers have a hint that it really came via a FDDI/Ethernet * bridge. */ if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0) m->m_flags |= M_LINK0; #endif l = mtod(m, struct llc *); switch (l->llc_dsap) { #if defined(INET) || defined(INET6) || defined(NS) || defined(DECNET) || defined(IPX) || defined(NETATALK) case LLC_SNAP_LSAP: { u_int16_t type; if (l->llc_control != LLC_UI || l->llc_ssap != LLC_SNAP_LSAP) goto dropanyway; #ifdef NETATALK if (bcmp(&(l->llc_snap_org_code)[0], at_org_code, sizeof(at_org_code)) == 0 && sizeof(at_org_code) == 0 && ntohs(l->llc_snap_ether_type) == ETHERTYPE_AT) { m_adj(m, sizeof(struct llc)); isr = NETISR_ATALK2; break; } if (bcmp(&(l->llc_snap_org_code)[0], aarp_org_code, sizeof(aarp_org_code)) == 0 && ntohs(l->llc_snap_ether_type) == ETHERTYPE_AARP) { m_adj(m, sizeof(struct llc)); isr = NETISR_AARP; break; } #endif if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0 || l->llc_snap.org_code[2] != 0) goto dropanyway; type = ntohs(l->llc_snap.ether_type); m_adj(m, 8); switch (type) { #ifdef INET case ETHERTYPE_IP: if (ipflow_fastforward(m, ifp->if_serializer)) return; isr = NETISR_IP; break; case ETHERTYPE_ARP: if (ifp->if_flags & IFF_NOARP) goto dropanyway; isr = NETISR_ARP; break; #endif #ifdef INET6 case ETHERTYPE_IPV6: isr = NETISR_IPV6; break; #endif #ifdef IPX case ETHERTYPE_IPX: isr = NETISR_IPX; break; #endif #ifdef NS case ETHERTYPE_NS: isr = NETISR_NS; break; #endif #ifdef DECNET case ETHERTYPE_DECNET: isr = NETISR_DECNET; break; #endif #ifdef NETATALK case ETHERTYPE_AT: isr = NETISR_ATALK1; break; case ETHERTYPE_AARP: isr = NETISR_AARP; break; #endif /* NETATALK */ default: /* printf("fddi_input: unknown protocol 0x%x\n", type); */ ifp->if_noproto++; goto dropanyway; } break; } #endif /* INET || NS */ default: /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ ifp->if_noproto++; dropanyway: m_freem(m); return; } netisr_dispatch(isr, m); } /* * Perform common duties while attaching to interface list */ #ifdef __NetBSD__ #define ifa_next ifa_list.tqe_next #endif void fddi_ifattach(struct ifnet *ifp, lwkt_serialize_t serializer) { struct sockaddr_dl *sdl; ifp->if_input = fddi_input; ifp->if_output = fddi_output; ifp->if_type = IFT_FDDI; ifp->if_addrlen = 6; ifp->if_broadcastaddr = fddibroadcastaddr; ifp->if_hdrlen = 21; ifp->if_mtu = FDDIMTU; ifp->if_resolvemulti = fddi_resolvemulti; ifp->if_baudrate = 100000000; #ifdef IFF_NOTRAILERS ifp->if_flags |= IFF_NOTRAILERS; #endif if_attach(ifp, serializer); #if defined(__DragonFly__) || defined(__FreeBSD__) sdl = IF_LLSOCKADDR(ifp); sdl->sdl_type = IFT_FDDI; sdl->sdl_alen = ifp->if_addrlen; bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); #elif defined(__NetBSD__) LIST_INIT(&((struct arpcom *)ifp)->ac_multiaddrs); for (ifa = ifp->if_addrlist.tqh_first; ifa != NULL; ifa = ifa->ifa_list.tqe_next) #else for (ifa = ifp->if_addrlist; ifa != NULL; ifa = ifa->ifa_next) #endif #if !defined(__DragonFly__) && !defined(__FreeBSD__) if ((sdl = (struct sockaddr_dl *)ifa->ifa_addr) && sdl->sdl_family == AF_LINK) { sdl->sdl_type = IFT_FDDI; sdl->sdl_alen = ifp->if_addrlen; bcopy(((struct arpcom *)ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); break; } #endif bpfattach(ifp, DLT_FDDI, sizeof(struct fddi_header)); } static int fddi_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa, struct sockaddr *sa) { struct sockaddr_dl *sdl; struct sockaddr_in *sin; #ifdef INET6 struct sockaddr_in6 *sin6; #endif u_char *e_addr; switch(sa->sa_family) { case AF_LINK: /* * No mapping needed. Just check that it's a valid MC address. */ sdl = (struct sockaddr_dl *)sa; e_addr = LLADDR(sdl); if ((e_addr[0] & 1) != 1) return EADDRNOTAVAIL; *llsa = 0; return 0; #ifdef INET case AF_INET: sin = (struct sockaddr_in *)sa; if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) return EADDRNOTAVAIL; MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, M_WAITOK); sdl->sdl_len = sizeof *sdl; sdl->sdl_family = AF_LINK; sdl->sdl_index = ifp->if_index; sdl->sdl_type = IFT_FDDI; sdl->sdl_nlen = 0; sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ sdl->sdl_slen = 0; e_addr = LLADDR(sdl); ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr); *llsa = (struct sockaddr *)sdl; return 0; #endif #ifdef INET6 case AF_INET6: sin6 = (struct sockaddr_in6 *)sa; if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) { /* * An IP6 address of 0 means listen to all * of the Ethernet multicast address used for IP6. * (This is used for multicast routers.) */ ifp->if_flags |= IFF_ALLMULTI; *llsa = 0; return 0; } if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) return EADDRNOTAVAIL; MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR, M_WAITOK); sdl->sdl_len = sizeof *sdl; sdl->sdl_family = AF_LINK; sdl->sdl_index = ifp->if_index; sdl->sdl_type = IFT_FDDI; sdl->sdl_nlen = 0; sdl->sdl_alen = ETHER_ADDR_LEN; /* XXX */ sdl->sdl_slen = 0; e_addr = LLADDR(sdl); ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr); *llsa = (struct sockaddr *)sdl; return 0; #endif default: /* * Well, the text isn't quite right, but it's the name * that counts... */ return EAFNOSUPPORT; } }