2 * Copyright (c) 1995, 1996
3 * Matt Thomas <matt@3am-software.com>. All rights reserved.
4 * Copyright (c) 1982, 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
39 #include "opt_atalk.h"
41 #include "opt_inet6.h"
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
49 #include <sys/module.h>
50 #include <sys/socket.h>
51 #include <sys/sockio.h>
54 #include <net/if_var.h>
55 #include <net/if_dl.h>
56 #include <net/if_llc.h>
57 #include <net/if_types.h>
58 #include <net/if_llatbl.h>
60 #include <net/ethernet.h>
61 #include <net/netisr.h>
62 #include <net/route.h>
66 #if defined(INET) || defined(INET6)
67 #include <netinet/in.h>
68 #include <netinet/in_var.h>
69 #include <netinet/if_ether.h>
72 #include <netinet6/nd6.h>
76 #include <netipx/ipx.h>
77 #include <netipx/ipx_if.h>
81 #include <netdnet/dn.h>
85 #include <netatalk/at.h>
86 #include <netatalk/at_var.h>
87 #include <netatalk/at_extern.h>
89 extern u_char at_org_code[ 3 ];
90 extern u_char aarp_org_code[ 3 ];
93 #include <security/mac/mac_framework.h>
95 static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] =
96 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
98 static int fddi_resolvemulti(struct ifnet *, struct sockaddr **,
100 static int fddi_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
102 static void fddi_input(struct ifnet *ifp, struct mbuf *m);
104 #define senderr(e) do { error = (e); goto bad; } while (0)
107 * FDDI output routine.
108 * Encapsulate a packet of type family for the local net.
109 * Use trailer local net encapsulation if enough data in first
110 * packet leaves a multiple of 512 bytes of data in remainder.
111 * Assumes that ifp is actually pointer to arpcom structure.
114 fddi_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
118 int loop_copy = 0, error = 0, hdrcmplt = 0;
119 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN];
120 struct fddi_header *fh;
121 #if defined(INET) || defined(INET6)
126 error = mac_ifnet_check_transmit(ifp, m);
131 if (ifp->if_flags & IFF_MONITOR)
133 if (!((ifp->if_flags & IFF_UP) &&
134 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
136 getmicrotime(&ifp->if_lastchange);
138 switch (dst->sa_family) {
141 struct rtentry *rt0 = NULL;
145 error = arpresolve(ifp, rt0, m, dst, edst, &lle);
147 return (error == EWOULDBLOCK ? 0 : error);
148 type = htons(ETHERTYPE_IP);
154 ah = mtod(m, struct arphdr *);
155 ah->ar_hrd = htons(ARPHRD_ETHER);
157 loop_copy = -1; /* if this is for us, don't do it */
159 switch (ntohs(ah->ar_op)) {
160 case ARPOP_REVREQUEST:
162 type = htons(ETHERTYPE_REVARP);
167 type = htons(ETHERTYPE_ARP);
171 if (m->m_flags & M_BCAST)
172 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
174 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
181 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
183 return (error); /* Something bad happened */
184 type = htons(ETHERTYPE_IPV6);
189 type = htons(ETHERTYPE_IPX);
190 bcopy(&((const struct sockaddr_ipx *)dst)->sipx_addr.x_host,
191 edst, FDDI_ADDR_LEN);
196 struct at_ifaddr *aa;
197 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst))
200 * ifaddr is the first thing in at_ifaddr
202 if ((aa = at_ifawithnet((const struct sockaddr_at *)dst)) == 0)
206 * In the phase 2 case, we need to prepend an mbuf for the llc header.
207 * Since we must preserve the value of m, which is passed to us by
208 * value, we m_copy() the first mbuf, and use it for our llc header.
210 if (aa->aa_flags & AFA_PHASE2) {
213 M_PREPEND(m, LLC_SNAPFRAMELEN, M_WAITOK);
214 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
215 llc.llc_control = LLC_UI;
216 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code));
217 llc.llc_snap.ether_type = htons(ETHERTYPE_AT);
218 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
221 type = htons(ETHERTYPE_AT);
223 ifa_free(&aa->aa_ifa);
226 #endif /* NETATALK */
228 case pseudo_AF_HDRCMPLT:
230 const struct ether_header *eh;
233 eh = (const struct ether_header *)dst->sa_data;
234 bcopy(eh->ether_shost, esrc, FDDI_ADDR_LEN);
240 const struct ether_header *eh;
243 eh = (const struct ether_header *)dst->sa_data;
244 bcopy(eh->ether_dhost, edst, FDDI_ADDR_LEN);
246 m->m_flags |= (M_BCAST|M_MCAST);
247 type = eh->ether_type;
253 fh = mtod(m, struct fddi_header *);
254 error = EPROTONOSUPPORT;
255 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
256 case FDDIFC_LLC_ASYNC: {
257 /* legal priorities are 0 through 7 */
258 if ((fh->fddi_fc & FDDIFC_Z) > 7)
262 case FDDIFC_LLC_SYNC: {
263 /* FDDIFC_Z bits reserved, must be zero */
264 if (fh->fddi_fc & FDDIFC_Z)
269 /* FDDIFC_Z bits must be non zero */
270 if ((fh->fddi_fc & FDDIFC_Z) == 0)
275 /* anything else is too dangerous */
280 if (fh->fddi_dhost[0] & 1)
281 m->m_flags |= (M_BCAST|M_MCAST);
285 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
286 senderr(EAFNOSUPPORT);
294 M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT);
297 l = mtod(m, struct llc *);
298 l->llc_control = LLC_UI;
299 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
300 l->llc_snap.org_code[0] =
301 l->llc_snap.org_code[1] =
302 l->llc_snap.org_code[2] = 0;
303 l->llc_snap.ether_type = htons(type);
307 * Add local net header. If no space in first mbuf,
310 M_PREPEND(m, FDDI_HDR_LEN, M_NOWAIT);
313 fh = mtod(m, struct fddi_header *);
314 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
315 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN);
318 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
320 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
324 * If a simplex interface, and the packet is being sent to our
325 * Ethernet address or a broadcast address, loopback a copy.
326 * XXX To make a simplex device behave exactly like a duplex
327 * device, we should copy in the case of sending to our own
328 * ethernet address (thus letting the original actually appear
329 * on the wire). However, we don't do that here for security
330 * reasons and compatibility with the original behavior.
332 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
333 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
335 n = m_copy(m, 0, (int)M_COPYALL);
336 (void) if_simloop(ifp, n, dst->sa_family,
338 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
339 FDDI_ADDR_LEN) == 0) {
340 (void) if_simloop(ifp, m, dst->sa_family,
342 return (0); /* XXX */
346 error = (ifp->if_transmit)(ifp, m);
360 * Process a received FDDI packet.
369 struct fddi_header *fh;
372 * Do consistency checks to verify assumptions
373 * made by code past this point.
375 if ((m->m_flags & M_PKTHDR) == 0) {
376 if_printf(ifp, "discard frame w/o packet header\n");
381 if (m->m_pkthdr.rcvif == NULL) {
382 if_printf(ifp, "discard frame w/o interface pointer\n");
388 m = m_pullup(m, FDDI_HDR_LEN);
393 fh = mtod(m, struct fddi_header *);
396 * Discard packet if interface is not up.
398 if (!((ifp->if_flags & IFF_UP) &&
399 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
403 * Give bpf a chance at the packet.
408 * Interface marked for monitoring; discard packet.
410 if (ifp->if_flags & IFF_MONITOR) {
416 mac_ifnet_create_mbuf(ifp, m);
420 * Update interface statistics.
422 ifp->if_ibytes += m->m_pkthdr.len;
423 getmicrotime(&ifp->if_lastchange);
426 * Discard non local unicast packets when interface
427 * is in promiscuous mode.
429 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
430 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost,
431 FDDI_ADDR_LEN) != 0))
435 * Set mbuf flags for bcast/mcast.
437 if (fh->fddi_dhost[0] & 1) {
438 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
440 m->m_flags |= M_BCAST;
442 m->m_flags |= M_MCAST;
448 * If this has a LLC priority of 0, then mark it so upper
449 * layers have a hint that it really came via a FDDI/Ethernet
452 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
453 m->m_flags |= M_LINK0;
456 /* Strip off FDDI header. */
457 m_adj(m, FDDI_HDR_LEN);
459 m = m_pullup(m, LLC_SNAPFRAMELEN);
464 l = mtod(m, struct llc *);
466 switch (l->llc_dsap) {
470 if ((l->llc_control != LLC_UI) ||
471 (l->llc_ssap != LLC_SNAP_LSAP)) {
476 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code,
477 sizeof(at_org_code)) == 0 &&
478 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) {
480 m_adj(m, LLC_SNAPFRAMELEN);
484 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code,
485 sizeof(aarp_org_code)) == 0 &&
486 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) {
487 m_adj(m, LLC_SNAPFRAMELEN);
491 #endif /* NETATALK */
492 if (l->llc_snap.org_code[0] != 0 ||
493 l->llc_snap.org_code[1] != 0 ||
494 l->llc_snap.org_code[2] != 0) {
499 type = ntohs(l->llc_snap.ether_type);
500 m_adj(m, LLC_SNAPFRAMELEN);
505 if ((m = ip_fastforward(m)) == NULL)
511 if (ifp->if_flags & IFF_NOARP)
527 case ETHERTYPE_DECNET:
538 #endif /* NETATALK */
540 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
548 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
552 M_SETFIB(m, ifp->if_fib);
553 netisr_dispatch(isr, m);
564 * Perform common duties while attaching to interface list
567 fddi_ifattach(ifp, lla, bpf)
573 struct sockaddr_dl *sdl;
575 ifp->if_type = IFT_FDDI;
576 ifp->if_addrlen = FDDI_ADDR_LEN;
579 if_attach(ifp); /* Must be called before additional assignments */
581 ifp->if_mtu = FDDIMTU;
582 ifp->if_output = fddi_output;
583 ifp->if_input = fddi_input;
584 ifp->if_resolvemulti = fddi_resolvemulti;
585 ifp->if_broadcastaddr = fddibroadcastaddr;
586 ifp->if_baudrate = 100000000;
587 #ifdef IFF_NOTRAILERS
588 ifp->if_flags |= IFF_NOTRAILERS;
591 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
593 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
594 sdl->sdl_type = IFT_FDDI;
595 sdl->sdl_alen = ifp->if_addrlen;
596 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
599 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
605 fddi_ifdetach(ifp, bpf)
619 fddi_ioctl (ifp, command, data)
628 ifa = (struct ifaddr *) data;
629 ifr = (struct ifreq *) data;
634 ifp->if_flags |= IFF_UP;
636 switch (ifa->ifa_addr->sa_family) {
638 case AF_INET: /* before arpwhohas */
639 ifp->if_init(ifp->if_softc);
640 arp_ifinit(ifp, ifa);
645 * XXX - This code is probably wrong
648 struct ipx_addr *ina;
650 ina = &(IA_SIPX(ifa)->sipx_addr);
652 if (ipx_nullhost(*ina)) {
653 ina->x_host = *(union ipx_host *)
656 bcopy((caddr_t) ina->x_host.c_host,
657 (caddr_t) IF_LLADDR(ifp),
664 ifp->if_init(ifp->if_softc);
669 ifp->if_init(ifp->if_softc);
676 sa = (struct sockaddr *) & ifr->ifr_data;
677 bcopy(IF_LLADDR(ifp),
678 (caddr_t) sa->sa_data, FDDI_ADDR_LEN);
684 * Set the interface MTU.
686 if (ifr->ifr_mtu > FDDIMTU) {
689 ifp->if_mtu = ifr->ifr_mtu;
701 fddi_resolvemulti(ifp, llsa, sa)
703 struct sockaddr **llsa;
706 struct sockaddr_dl *sdl;
708 struct sockaddr_in *sin;
711 struct sockaddr_in6 *sin6;
715 switch(sa->sa_family) {
718 * No mapping needed. Just check that it's a valid MC address.
720 sdl = (struct sockaddr_dl *)sa;
721 e_addr = LLADDR(sdl);
722 if ((e_addr[0] & 1) != 1)
723 return (EADDRNOTAVAIL);
729 sin = (struct sockaddr_in *)sa;
730 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
731 return (EADDRNOTAVAIL);
732 sdl = malloc(sizeof *sdl, M_IFMADDR,
736 sdl->sdl_len = sizeof *sdl;
737 sdl->sdl_family = AF_LINK;
738 sdl->sdl_index = ifp->if_index;
739 sdl->sdl_type = IFT_FDDI;
741 sdl->sdl_alen = FDDI_ADDR_LEN;
743 e_addr = LLADDR(sdl);
744 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
745 *llsa = (struct sockaddr *)sdl;
750 sin6 = (struct sockaddr_in6 *)sa;
751 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
753 * An IP6 address of 0 means listen to all
754 * of the Ethernet multicast address used for IP6.
755 * (This is used for multicast routers.)
757 ifp->if_flags |= IFF_ALLMULTI;
761 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
762 return (EADDRNOTAVAIL);
763 sdl = malloc(sizeof *sdl, M_IFMADDR,
767 sdl->sdl_len = sizeof *sdl;
768 sdl->sdl_family = AF_LINK;
769 sdl->sdl_index = ifp->if_index;
770 sdl->sdl_type = IFT_FDDI;
772 sdl->sdl_alen = FDDI_ADDR_LEN;
774 e_addr = LLADDR(sdl);
775 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
776 *llsa = (struct sockaddr *)sdl;
782 * Well, the text isn't quite right, but it's the name
785 return (EAFNOSUPPORT);
791 static moduledata_t fddi_mod = {
792 "fddi", /* module name */
793 NULL, /* event handler */
797 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
798 MODULE_VERSION(fddi, 1);