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"
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
49 #include <sys/malloc.h>
51 #include <sys/module.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
56 #include <net/if_dl.h>
57 #include <net/if_llc.h>
58 #include <net/if_types.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
65 #if defined(INET) || defined(INET6)
66 #include <netinet/in.h>
67 #include <netinet/in_var.h>
68 #include <netinet/if_ether.h>
71 #include <netinet6/nd6.h>
75 #include <netipx/ipx.h>
76 #include <netipx/ipx_if.h>
80 #include <netdnet/dn.h>
84 #include <netatalk/at.h>
85 #include <netatalk/at_var.h>
86 #include <netatalk/at_extern.h>
88 extern u_char at_org_code[ 3 ];
89 extern u_char aarp_org_code[ 3 ];
92 static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] =
93 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
95 static int fddi_resolvemulti(struct ifnet *, struct sockaddr **,
97 static int fddi_output(struct ifnet *, struct mbuf *, struct sockaddr *,
99 static void fddi_input(struct ifnet *ifp, struct mbuf *m);
101 #define senderr(e) do { error = (e); goto bad; } while (0)
104 * FDDI output routine.
105 * Encapsulate a packet of type family for the local net.
106 * Use trailer local net encapsulation if enough data in first
107 * packet leaves a multiple of 512 bytes of data in remainder.
108 * Assumes that ifp is actually pointer to arpcom structure.
111 fddi_output(ifp, m, dst, rt0)
114 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;
123 error = mac_check_ifnet_transmit(ifp, m);
128 if (ifp->if_flags & IFF_MONITOR)
130 if (!((ifp->if_flags & IFF_UP) &&
131 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
133 getmicrotime(&ifp->if_lastchange);
135 switch (dst->sa_family) {
138 error = arpresolve(ifp, rt0, m, dst, edst);
140 return (error == EWOULDBLOCK ? 0 : error);
141 type = htons(ETHERTYPE_IP);
147 ah = mtod(m, struct arphdr *);
148 ah->ar_hrd = htons(ARPHRD_ETHER);
150 loop_copy = -1; /* if this is for us, don't do it */
152 switch (ntohs(ah->ar_op)) {
153 case ARPOP_REVREQUEST:
155 type = htons(ETHERTYPE_REVARP);
160 type = htons(ETHERTYPE_ARP);
164 if (m->m_flags & M_BCAST)
165 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
167 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
174 error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst);
176 return (error); /* Something bad happened */
177 type = htons(ETHERTYPE_IPV6);
182 type = htons(ETHERTYPE_IPX);
183 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
184 (caddr_t)edst, FDDI_ADDR_LEN);
189 struct at_ifaddr *aa;
190 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst))
193 * ifaddr is the first thing in at_ifaddr
195 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0)
199 * In the phase 2 case, we need to prepend an mbuf for the llc header.
200 * Since we must preserve the value of m, which is passed to us by
201 * value, we m_copy() the first mbuf, and use it for our llc header.
203 if (aa->aa_flags & AFA_PHASE2) {
206 M_PREPEND(m, LLC_SNAPFRAMELEN, M_TRYWAIT);
209 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
210 llc.llc_control = LLC_UI;
211 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code));
212 llc.llc_snap.ether_type = htons(ETHERTYPE_AT);
213 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
216 type = htons(ETHERTYPE_AT);
220 #endif /* NETATALK */
222 case pseudo_AF_HDRCMPLT:
224 struct ether_header *eh;
226 eh = (struct ether_header *)dst->sa_data;
227 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN);
233 struct ether_header *eh;
235 eh = (struct ether_header *)dst->sa_data;
236 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN);
238 m->m_flags |= (M_BCAST|M_MCAST);
239 type = eh->ether_type;
245 fh = mtod(m, struct fddi_header *);
246 error = EPROTONOSUPPORT;
247 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
248 case FDDIFC_LLC_ASYNC: {
249 /* legal priorities are 0 through 7 */
250 if ((fh->fddi_fc & FDDIFC_Z) > 7)
254 case FDDIFC_LLC_SYNC: {
255 /* FDDIFC_Z bits reserved, must be zero */
256 if (fh->fddi_fc & FDDIFC_Z)
261 /* FDDIFC_Z bits must be non zero */
262 if ((fh->fddi_fc & FDDIFC_Z) == 0)
267 /* anything else is too dangerous */
272 if (fh->fddi_dhost[0] & 1)
273 m->m_flags |= (M_BCAST|M_MCAST);
277 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
278 senderr(EAFNOSUPPORT);
286 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
289 l = mtod(m, struct llc *);
290 l->llc_control = LLC_UI;
291 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
292 l->llc_snap.org_code[0] =
293 l->llc_snap.org_code[1] =
294 l->llc_snap.org_code[2] = 0;
295 l->llc_snap.ether_type = htons(type);
299 * Add local net header. If no space in first mbuf,
302 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT);
305 fh = mtod(m, struct fddi_header *);
306 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
307 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN);
310 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
312 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
316 * If a simplex interface, and the packet is being sent to our
317 * Ethernet address or a broadcast address, loopback a copy.
318 * XXX To make a simplex device behave exactly like a duplex
319 * device, we should copy in the case of sending to our own
320 * ethernet address (thus letting the original actually appear
321 * on the wire). However, we don't do that here for security
322 * reasons and compatibility with the original behavior.
324 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
325 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
327 n = m_copy(m, 0, (int)M_COPYALL);
328 (void) if_simloop(ifp, n, dst->sa_family,
330 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
331 FDDI_ADDR_LEN) == 0) {
332 (void) if_simloop(ifp, m, dst->sa_family,
334 return (0); /* XXX */
338 IFQ_HANDOFF(ifp, m, error);
352 * Process a received FDDI packet.
361 struct fddi_header *fh;
364 * Do consistency checks to verify assumptions
365 * made by code past this point.
367 if ((m->m_flags & M_PKTHDR) == 0) {
368 if_printf(ifp, "discard frame w/o packet header\n");
373 if (m->m_pkthdr.rcvif == NULL) {
374 if_printf(ifp, "discard frame w/o interface pointer\n");
380 m = m_pullup(m, FDDI_HDR_LEN);
385 fh = mtod(m, struct fddi_header *);
386 m->m_pkthdr.header = (void *)fh;
389 * Discard packet if interface is not up.
391 if (!((ifp->if_flags & IFF_UP) &&
392 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
396 * Give bpf a chance at the packet.
401 * Interface marked for monitoring; discard packet.
403 if (ifp->if_flags & IFF_MONITOR) {
409 mac_create_mbuf_from_ifnet(ifp, m);
413 * Update interface statistics.
415 ifp->if_ibytes += m->m_pkthdr.len;
416 getmicrotime(&ifp->if_lastchange);
419 * Discard non local unicast packets when interface
420 * is in promiscuous mode.
422 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
423 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost,
424 FDDI_ADDR_LEN) != 0))
428 * Set mbuf flags for bcast/mcast.
430 if (fh->fddi_dhost[0] & 1) {
431 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
433 m->m_flags |= M_BCAST;
435 m->m_flags |= M_MCAST;
441 * If this has a LLC priority of 0, then mark it so upper
442 * layers have a hint that it really came via a FDDI/Ethernet
445 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
446 m->m_flags |= M_LINK0;
449 /* Strip off FDDI header. */
450 m_adj(m, FDDI_HDR_LEN);
452 m = m_pullup(m, LLC_SNAPFRAMELEN);
457 l = mtod(m, struct llc *);
459 switch (l->llc_dsap) {
463 if ((l->llc_control != LLC_UI) ||
464 (l->llc_ssap != LLC_SNAP_LSAP)) {
469 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code,
470 sizeof(at_org_code)) == 0 &&
471 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) {
473 m_adj(m, LLC_SNAPFRAMELEN);
477 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code,
478 sizeof(aarp_org_code)) == 0 &&
479 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) {
480 m_adj(m, LLC_SNAPFRAMELEN);
484 #endif /* NETATALK */
485 if (l->llc_snap.org_code[0] != 0 ||
486 l->llc_snap.org_code[1] != 0 ||
487 l->llc_snap.org_code[2] != 0) {
492 type = ntohs(l->llc_snap.ether_type);
493 m_adj(m, LLC_SNAPFRAMELEN);
498 if ((m = ip_fastforward(m)) == NULL)
504 if (ifp->if_flags & IFF_NOARP)
520 case ETHERTYPE_DECNET:
531 #endif /* NETATALK */
533 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
541 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
545 netisr_dispatch(isr, m);
556 * Perform common duties while attaching to interface list
559 fddi_ifattach(ifp, lla, bpf)
565 struct sockaddr_dl *sdl;
567 ifp->if_type = IFT_FDDI;
568 ifp->if_addrlen = FDDI_ADDR_LEN;
571 if_attach(ifp); /* Must be called before additional assignments */
573 ifp->if_mtu = FDDIMTU;
574 ifp->if_output = fddi_output;
575 ifp->if_input = fddi_input;
576 ifp->if_resolvemulti = fddi_resolvemulti;
577 ifp->if_broadcastaddr = fddibroadcastaddr;
578 ifp->if_baudrate = 100000000;
579 #ifdef IFF_NOTRAILERS
580 ifp->if_flags |= IFF_NOTRAILERS;
583 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
585 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
586 sdl->sdl_type = IFT_FDDI;
587 sdl->sdl_alen = ifp->if_addrlen;
588 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
591 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
597 fddi_ifdetach(ifp, bpf)
611 fddi_ioctl (ifp, command, data)
620 ifa = (struct ifaddr *) data;
621 ifr = (struct ifreq *) data;
626 ifp->if_flags |= IFF_UP;
628 switch (ifa->ifa_addr->sa_family) {
630 case AF_INET: /* before arpwhohas */
631 ifp->if_init(ifp->if_softc);
632 arp_ifinit(ifp, ifa);
637 * XXX - This code is probably wrong
640 struct ipx_addr *ina;
642 ina = &(IA_SIPX(ifa)->sipx_addr);
644 if (ipx_nullhost(*ina)) {
645 ina->x_host = *(union ipx_host *)
648 bcopy((caddr_t) ina->x_host.c_host,
649 (caddr_t) IF_LLADDR(ifp),
656 ifp->if_init(ifp->if_softc);
661 ifp->if_init(ifp->if_softc);
668 sa = (struct sockaddr *) & ifr->ifr_data;
669 bcopy(IF_LLADDR(ifp),
670 (caddr_t) sa->sa_data, FDDI_ADDR_LEN);
676 * Set the interface MTU.
678 if (ifr->ifr_mtu > FDDIMTU) {
681 ifp->if_mtu = ifr->ifr_mtu;
693 fddi_resolvemulti(ifp, llsa, sa)
695 struct sockaddr **llsa;
698 struct sockaddr_dl *sdl;
699 struct sockaddr_in *sin;
701 struct sockaddr_in6 *sin6;
705 switch(sa->sa_family) {
708 * No mapping needed. Just check that it's a valid MC address.
710 sdl = (struct sockaddr_dl *)sa;
711 e_addr = LLADDR(sdl);
712 if ((e_addr[0] & 1) != 1)
713 return (EADDRNOTAVAIL);
719 sin = (struct sockaddr_in *)sa;
720 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
721 return (EADDRNOTAVAIL);
722 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
726 sdl->sdl_len = sizeof *sdl;
727 sdl->sdl_family = AF_LINK;
728 sdl->sdl_index = ifp->if_index;
729 sdl->sdl_type = IFT_FDDI;
731 sdl->sdl_alen = FDDI_ADDR_LEN;
733 e_addr = LLADDR(sdl);
734 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
735 *llsa = (struct sockaddr *)sdl;
740 sin6 = (struct sockaddr_in6 *)sa;
741 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
743 * An IP6 address of 0 means listen to all
744 * of the Ethernet multicast address used for IP6.
745 * (This is used for multicast routers.)
747 ifp->if_flags |= IFF_ALLMULTI;
751 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
752 return (EADDRNOTAVAIL);
753 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
757 sdl->sdl_len = sizeof *sdl;
758 sdl->sdl_family = AF_LINK;
759 sdl->sdl_index = ifp->if_index;
760 sdl->sdl_type = IFT_FDDI;
762 sdl->sdl_alen = FDDI_ADDR_LEN;
764 e_addr = LLADDR(sdl);
765 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
766 *llsa = (struct sockaddr *)sdl;
772 * Well, the text isn't quite right, but it's the name
775 return (EAFNOSUPPORT);
781 static moduledata_t fddi_mod = {
782 "fddi", /* module name */
783 NULL, /* event handler */
787 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
788 MODULE_VERSION(fddi, 1);