/* * 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 * $FreeBSD$ */ #include "opt_atalk.h" #include "opt_inet.h" #include "opt_inet6.h" #include "opt_ipx.h" #include "opt_mac.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(INET) || defined(INET6) #include #include #include #endif #ifdef INET6 #include #endif #ifdef IPX #include #include #endif #ifdef DECNET #include #endif #ifdef NETATALK #include #include #include extern u_char at_org_code[ 3 ]; extern u_char aarp_org_code[ 3 ]; #endif /* NETATALK */ static u_char fddibroadcastaddr[FDDI_ADDR_LEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; static int fddi_resolvemulti(struct ifnet *, struct sockaddr **, struct sockaddr *); static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *, struct rtentry *); static void fddi_input(struct ifnet *ifp, struct mbuf *m); #define IFP2AC(IFP) ((struct arpcom *)IFP) #define senderr(e) do { error = (e); goto bad; } while (0) /* * 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(ifp, m, dst, rt0) struct ifnet *ifp; struct mbuf *m; struct sockaddr *dst; struct rtentry *rt0; { u_int16_t type; int loop_copy = 0, error = 0, hdrcmplt = 0; u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN]; struct rtentry *rt; struct fddi_header *fh; struct arpcom *ac = IFP2AC(ifp); #ifdef MAC error = mac_check_ifnet_transmit(ifp, m); if (error) senderr(error); #endif if (ifp->if_flags & IFF_MONITOR) senderr(ENETDOWN); if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) senderr(ENETDOWN); getmicrotime(&ifp->if_lastchange); error = rt_check(&rt, &rt0, dst); if (error) goto bad; switch (dst->sa_family) { #ifdef INET case AF_INET: { if (!arpresolve(ifp, rt, m, dst, edst, rt0)) return (0); /* if not yet resolved */ type = htons(ETHERTYPE_IP); break; } #endif /* INET */ #ifdef INET6 case AF_INET6: if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)) { /* Something bad happened */ return (0); } type = htons(ETHERTYPE_IPV6); break; #endif /* INET6 */ #ifdef IPX case AF_IPX: type = htons(ETHERTYPE_IPX); bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host), (caddr_t)edst, FDDI_ADDR_LEN); break; #endif /* IPX */ #ifdef NETATALK case AF_APPLETALK: { struct at_ifaddr *aa; if (!aarpresolve(ac, m, (struct sockaddr_at *)dst, edst)) return (0); /* * ifaddr is the first thing in at_ifaddr */ if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0) 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, LLC_SNAPFRAMELEN, M_TRYWAIT); if (m == 0) 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), LLC_SNAPFRAMELEN); type = 0; } else { type = htons(ETHERTYPE_AT); } break; } #endif /* NETATALK */ case pseudo_AF_HDRCMPLT: { struct ether_header *eh; hdrcmplt = 1; eh = (struct ether_header *)dst->sa_data; bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN); /* FALLTHROUGH */ } case AF_UNSPEC: { struct ether_header *eh; loop_copy = -1; eh = (struct ether_header *)dst->sa_data; bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN); 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: if_printf(ifp, "can't handle af%d\n", dst->sa_family); senderr(EAFNOSUPPORT); } /* * Add LLC header. */ if (type != 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; l->llc_snap.ether_type = htons(type); } /* * Add local net header. If no space in first mbuf, * allocate another. */ M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT); if (m == 0) senderr(ENOBUFS); fh = mtod(m, struct fddi_header *); fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4; bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN); queue_it: if (hdrcmplt) bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); else bcopy((caddr_t)ac->ac_enaddr, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN); /* * If a simplex interface, and the packet is being sent to our * 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 > 0)) { struct mbuf *n; n = m_copy(m, 0, (int)M_COPYALL); (void) if_simloop(ifp, n, dst->sa_family, FDDI_HDR_LEN); } else if (bcmp(fh->fddi_dhost, fh->fddi_shost, FDDI_ADDR_LEN) == 0) { (void) if_simloop(ifp, m, dst->sa_family, FDDI_HDR_LEN); return (0); /* XXX */ } } if (! IF_HANDOFF(&ifp->if_snd, m, ifp)) senderr(ENOBUFS); return (error); bad: ifp->if_oerrors++; if (m) m_freem(m); return (error); } /* * Process a received FDDI packet. */ static void fddi_input(ifp, m) struct ifnet *ifp; struct mbuf *m; { int isr; struct llc *l; struct fddi_header *fh; /* * Do consistency checks to verify assumptions * made by code past this point. */ if ((m->m_flags & M_PKTHDR) == 0) { if_printf(ifp, "discard frame w/o packet header\n"); ifp->if_ierrors++; m_freem(m); return; } if (m->m_pkthdr.rcvif == NULL) { if_printf(ifp, "discard frame w/o interface pointer\n"); ifp->if_ierrors++; m_freem(m); return; } m = m_pullup(m, FDDI_HDR_LEN); if (m == NULL) { ifp->if_ierrors++; goto dropanyway; } fh = mtod(m, struct fddi_header *); m->m_pkthdr.header = (void *)fh; /* * Discard packet if interface is not up. */ if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING)) goto dropanyway; /* * Give bpf a chance at the packet. */ BPF_MTAP(ifp, m); /* * Interface marked for monitoring; discard packet. */ if (ifp->if_flags & IFF_MONITOR) { m_freem(m); return; } #ifdef MAC mac_create_mbuf_from_ifnet(ifp, m); #endif /* * Update interface statistics. */ ifp->if_ibytes += m->m_pkthdr.len; getmicrotime(&ifp->if_lastchange); /* * Discard non local unicast packets when interface * is in promiscuous mode. */ if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) && (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN) != 0)) goto dropanyway; /* * Set mbuf flags for bcast/mcast. */ if (fh->fddi_dhost[0] & 1) { if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost, FDDI_ADDR_LEN) == 0) m->m_flags |= M_BCAST; else m->m_flags |= M_MCAST; ifp->if_imcasts++; } #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 /* Strip off FDDI header. */ m_adj(m, FDDI_HDR_LEN); m = m_pullup(m, LLC_SNAPFRAMELEN); if (m == 0) { ifp->if_ierrors++; goto dropanyway; } l = mtod(m, struct llc *); switch (l->llc_dsap) { case LLC_SNAP_LSAP: { u_int16_t type; if ((l->llc_control != LLC_UI) || (l->llc_ssap != LLC_SNAP_LSAP)) { ifp->if_noproto++; goto dropanyway; } #ifdef NETATALK if (Bcmp(&(l->llc_snap.org_code)[0], at_org_code, sizeof(at_org_code)) == 0 && ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) { isr = NETISR_ATALK2; m_adj(m, LLC_SNAPFRAMELEN); 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, LLC_SNAPFRAMELEN); isr = NETISR_AARP; break; } #endif /* NETATALK */ if (l->llc_snap.org_code[0] != 0 || l->llc_snap.org_code[1] != 0 || l->llc_snap.org_code[2] != 0) { ifp->if_noproto++; goto dropanyway; } type = ntohs(l->llc_snap.ether_type); m_adj(m, LLC_SNAPFRAMELEN); switch (type) { #ifdef INET case ETHERTYPE_IP: if (ipflow_fastforward(m)) 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 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; } default: /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */ ifp->if_noproto++; goto dropanyway; } netisr_dispatch(isr, m); return; dropanyway: ifp->if_iqdrops++; if (m) m_freem(m); return; } /* * Perform common duties while attaching to interface list */ void fddi_ifattach(ifp, bpf) struct ifnet *ifp; int bpf; { struct ifaddr *ifa; struct sockaddr_dl *sdl; ifp->if_type = IFT_FDDI; ifp->if_addrlen = FDDI_ADDR_LEN; ifp->if_hdrlen = 21; if_attach(ifp); /* Must be called before additional assignments */ ifp->if_mtu = FDDIMTU; ifp->if_output = fddi_output; ifp->if_input = fddi_input; ifp->if_resolvemulti = fddi_resolvemulti; ifp->if_broadcastaddr = fddibroadcastaddr; ifp->if_baudrate = 100000000; #ifdef IFF_NOTRAILERS ifp->if_flags |= IFF_NOTRAILERS; #endif ifa = ifaddr_byindex(ifp->if_index); if (ifa == NULL) { if_printf(ifp, "%s() no lladdr!\n", __func__); return; } sdl = (struct sockaddr_dl *)ifa->ifa_addr; sdl->sdl_type = IFT_FDDI; sdl->sdl_alen = ifp->if_addrlen; bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen); if (bpf) bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN); return; } void fddi_ifdetach(ifp, bpf) struct ifnet *ifp; int bpf; { if (bpf) bpfdetach(ifp); if_detach(ifp); return; } int fddi_ioctl (ifp, command, data) struct ifnet *ifp; int command; caddr_t data; { struct ifaddr *ifa; struct ifreq *ifr; int error; ifa = (struct ifaddr *) data; ifr = (struct ifreq *) data; error = 0; switch (command) { case SIOCSIFADDR: ifp->if_flags |= IFF_UP; switch (ifa->ifa_addr->sa_family) { #ifdef INET case AF_INET: /* before arpwhohas */ ifp->if_init(ifp->if_softc); arp_ifinit(ifp, ifa); break; #endif #ifdef IPX /* * XXX - This code is probably wrong */ case AF_IPX: { struct ipx_addr *ina; struct arpcom *ac; ina = &(IA_SIPX(ifa)->sipx_addr); ac = IFP2AC(ifp); if (ipx_nullhost(*ina)) { ina->x_host = *(union ipx_host *) ac->ac_enaddr; } else { bcopy((caddr_t) ina->x_host.c_host, (caddr_t) ac->ac_enaddr, sizeof(ac->ac_enaddr)); } /* * Set new address */ ifp->if_init(ifp->if_softc); } break; #endif default: ifp->if_init(ifp->if_softc); break; } case SIOCGIFADDR: { struct sockaddr *sa; sa = (struct sockaddr *) & ifr->ifr_data; bcopy(IFP2AC(ifp)->ac_enaddr, (caddr_t) sa->sa_data, FDDI_ADDR_LEN); } break; case SIOCSIFMTU: /* * Set the interface MTU. */ if (ifr->ifr_mtu > FDDIMTU) { error = EINVAL; } else { ifp->if_mtu = ifr->ifr_mtu; } break; default: break; } return (error); } static int fddi_resolvemulti(ifp, llsa, sa) 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 = FDDI_ADDR_LEN; 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 = FDDI_ADDR_LEN; 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); } return (0); } static moduledata_t fddi_mod = { "fddi", /* module name */ NULL, /* event handler */ 0 /* extra data */ }; DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); MODULE_VERSION(fddi, 1);