1 /*-
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.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
22 *
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
33 * SUCH DAMAGE.
34 *
35 * from: if_ethersubr.c,v 1.5 1994/12/13 22:31:45 wollman Exp
36 * $FreeBSD$
37 */
38
39 #include "opt_atalk.h"
40 #include "opt_inet.h"
41 #include "opt_inet6.h"
42 #include "opt_ipx.h"
43
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
48 #include <sys/mbuf.h>
49 #include <sys/module.h>
50 #include <sys/socket.h>
51 #include <sys/sockio.h>
52
53 #include <net/if.h>
54 #include <net/if_dl.h>
55 #include <net/if_llc.h>
56 #include <net/if_types.h>
57 #include <net/if_llatbl.h>
58
59 #include <net/ethernet.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
62 #include <net/bpf.h>
63 #include <net/fddi.h>
64
65 #if defined(INET) || defined(INET6)
66 #include <netinet/in.h>
67 #include <netinet/in_var.h>
68 #include <netinet/if_ether.h>
69 #endif
70 #ifdef INET6
71 #include <netinet6/nd6.h>
72 #endif
73
74 #ifdef IPX
75 #include <netipx/ipx.h>
76 #include <netipx/ipx_if.h>
77 #endif
78
79 #ifdef DECNET
80 #include <netdnet/dn.h>
81 #endif
82
83 #ifdef NETATALK
84 #include <netatalk/at.h>
85 #include <netatalk/at_var.h>
86 #include <netatalk/at_extern.h>
87
88 extern u_char at_org_code[ 3 ];
89 extern u_char aarp_org_code[ 3 ];
90 #endif /* NETATALK */
91
92 #include <security/mac/mac_framework.h>
93
94 static const u_char fddibroadcastaddr[FDDI_ADDR_LEN] =
95 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
96
97 static int fddi_resolvemulti(struct ifnet *, struct sockaddr **,
98 struct sockaddr *);
99 static int fddi_output(struct ifnet *, struct mbuf *, const struct sockaddr *,
100 struct route *);
101 static void fddi_input(struct ifnet *ifp, struct mbuf *m);
102
103 #define senderr(e) do { error = (e); goto bad; } while (0)
104
105 /*
106 * FDDI output routine.
107 * Encapsulate a packet of type family for the local net.
108 * Use trailer local net encapsulation if enough data in first
109 * packet leaves a multiple of 512 bytes of data in remainder.
110 * Assumes that ifp is actually pointer to arpcom structure.
111 */
112 static int
fddi_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)113 fddi_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
114 struct route *ro)
115 {
116 u_int16_t type;
117 int loop_copy = 0, error = 0, hdrcmplt = 0;
118 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN];
119 struct fddi_header *fh;
120 #if defined(INET) || defined(INET6)
121 struct llentry *lle;
122 #endif
123
124 #ifdef MAC
125 error = mac_ifnet_check_transmit(ifp, m);
126 if (error)
127 senderr(error);
128 #endif
129
130 if (ifp->if_flags & IFF_MONITOR)
131 senderr(ENETDOWN);
132 if (!((ifp->if_flags & IFF_UP) &&
133 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
134 senderr(ENETDOWN);
135 getmicrotime(&ifp->if_lastchange);
136
137 switch (dst->sa_family) {
138 #ifdef INET
139 case AF_INET: {
140 struct rtentry *rt0 = NULL;
141
142 if (ro != NULL)
143 rt0 = ro->ro_rt;
144 error = arpresolve(ifp, rt0, m, dst, edst, &lle);
145 if (error)
146 return (error == EWOULDBLOCK ? 0 : error);
147 type = htons(ETHERTYPE_IP);
148 break;
149 }
150 case AF_ARP:
151 {
152 struct arphdr *ah;
153 ah = mtod(m, struct arphdr *);
154 ah->ar_hrd = htons(ARPHRD_ETHER);
155
156 loop_copy = -1; /* if this is for us, don't do it */
157
158 switch (ntohs(ah->ar_op)) {
159 case ARPOP_REVREQUEST:
160 case ARPOP_REVREPLY:
161 type = htons(ETHERTYPE_REVARP);
162 break;
163 case ARPOP_REQUEST:
164 case ARPOP_REPLY:
165 default:
166 type = htons(ETHERTYPE_ARP);
167 break;
168 }
169
170 if (m->m_flags & M_BCAST)
171 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
172 else
173 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
174
175 }
176 break;
177 #endif /* INET */
178 #ifdef INET6
179 case AF_INET6:
180 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
181 if (error)
182 return (error); /* Something bad happened */
183 type = htons(ETHERTYPE_IPV6);
184 break;
185 #endif /* INET6 */
186 #ifdef IPX
187 case AF_IPX:
188 type = htons(ETHERTYPE_IPX);
189 bcopy(&((const struct sockaddr_ipx *)dst)->sipx_addr.x_host,
190 edst, FDDI_ADDR_LEN);
191 break;
192 #endif /* IPX */
193 #ifdef NETATALK
194 case AF_APPLETALK: {
195 struct at_ifaddr *aa;
196 if (!aarpresolve(ifp, m, (const struct sockaddr_at *)dst, edst))
197 return (0);
198 /*
199 * ifaddr is the first thing in at_ifaddr
200 */
201 if ((aa = at_ifawithnet((const struct sockaddr_at *)dst)) == 0)
202 goto bad;
203
204 /*
205 * In the phase 2 case, we need to prepend an mbuf for the llc header.
206 * Since we must preserve the value of m, which is passed to us by
207 * value, we m_copy() the first mbuf, and use it for our llc header.
208 */
209 if (aa->aa_flags & AFA_PHASE2) {
210 struct llc llc;
211
212 M_PREPEND(m, LLC_SNAPFRAMELEN, M_WAITOK);
213 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
214 llc.llc_control = LLC_UI;
215 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code));
216 llc.llc_snap.ether_type = htons(ETHERTYPE_AT);
217 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
218 type = 0;
219 } else {
220 type = htons(ETHERTYPE_AT);
221 }
222 ifa_free(&aa->aa_ifa);
223 break;
224 }
225 #endif /* NETATALK */
226
227 case pseudo_AF_HDRCMPLT:
228 {
229 const struct ether_header *eh;
230
231 hdrcmplt = 1;
232 eh = (const struct ether_header *)dst->sa_data;
233 bcopy(eh->ether_shost, esrc, FDDI_ADDR_LEN);
234 /* FALLTHROUGH */
235 }
236
237 case AF_UNSPEC:
238 {
239 const struct ether_header *eh;
240
241 loop_copy = -1;
242 eh = (const struct ether_header *)dst->sa_data;
243 bcopy(eh->ether_dhost, edst, FDDI_ADDR_LEN);
244 if (*edst & 1)
245 m->m_flags |= (M_BCAST|M_MCAST);
246 type = eh->ether_type;
247 break;
248 }
249
250 case AF_IMPLINK:
251 {
252 fh = mtod(m, struct fddi_header *);
253 error = EPROTONOSUPPORT;
254 switch (fh->fddi_fc & (FDDIFC_C|FDDIFC_L|FDDIFC_F)) {
255 case FDDIFC_LLC_ASYNC: {
256 /* legal priorities are 0 through 7 */
257 if ((fh->fddi_fc & FDDIFC_Z) > 7)
258 goto bad;
259 break;
260 }
261 case FDDIFC_LLC_SYNC: {
262 /* FDDIFC_Z bits reserved, must be zero */
263 if (fh->fddi_fc & FDDIFC_Z)
264 goto bad;
265 break;
266 }
267 case FDDIFC_SMT: {
268 /* FDDIFC_Z bits must be non zero */
269 if ((fh->fddi_fc & FDDIFC_Z) == 0)
270 goto bad;
271 break;
272 }
273 default: {
274 /* anything else is too dangerous */
275 goto bad;
276 }
277 }
278 error = 0;
279 if (fh->fddi_dhost[0] & 1)
280 m->m_flags |= (M_BCAST|M_MCAST);
281 goto queue_it;
282 }
283 default:
284 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
285 senderr(EAFNOSUPPORT);
286 }
287
288 /*
289 * Add LLC header.
290 */
291 if (type != 0) {
292 struct llc *l;
293 M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT);
294 if (m == 0)
295 senderr(ENOBUFS);
296 l = mtod(m, struct llc *);
297 l->llc_control = LLC_UI;
298 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
299 l->llc_snap.org_code[0] =
300 l->llc_snap.org_code[1] =
301 l->llc_snap.org_code[2] = 0;
302 l->llc_snap.ether_type = htons(type);
303 }
304
305 /*
306 * Add local net header. If no space in first mbuf,
307 * allocate another.
308 */
309 M_PREPEND(m, FDDI_HDR_LEN, M_NOWAIT);
310 if (m == 0)
311 senderr(ENOBUFS);
312 fh = mtod(m, struct fddi_header *);
313 fh->fddi_fc = FDDIFC_LLC_ASYNC|FDDIFC_LLC_PRIO4;
314 bcopy((caddr_t)edst, (caddr_t)fh->fddi_dhost, FDDI_ADDR_LEN);
315 queue_it:
316 if (hdrcmplt)
317 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
318 else
319 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
320 FDDI_ADDR_LEN);
321
322 /*
323 * If a simplex interface, and the packet is being sent to our
324 * Ethernet address or a broadcast address, loopback a copy.
325 * XXX To make a simplex device behave exactly like a duplex
326 * device, we should copy in the case of sending to our own
327 * ethernet address (thus letting the original actually appear
328 * on the wire). However, we don't do that here for security
329 * reasons and compatibility with the original behavior.
330 */
331 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
332 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
333 struct mbuf *n;
334 n = m_copy(m, 0, (int)M_COPYALL);
335 (void) if_simloop(ifp, n, dst->sa_family,
336 FDDI_HDR_LEN);
337 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
338 FDDI_ADDR_LEN) == 0) {
339 (void) if_simloop(ifp, m, dst->sa_family,
340 FDDI_HDR_LEN);
341 return (0); /* XXX */
342 }
343 }
344
345 error = (ifp->if_transmit)(ifp, m);
346 if (error)
347 ifp->if_oerrors++;
348
349 return (error);
350
351 bad:
352 ifp->if_oerrors++;
353 if (m)
354 m_freem(m);
355 return (error);
356 }
357
358 /*
359 * Process a received FDDI packet.
360 */
361 static void
fddi_input(ifp,m)362 fddi_input(ifp, m)
363 struct ifnet *ifp;
364 struct mbuf *m;
365 {
366 int isr;
367 struct llc *l;
368 struct fddi_header *fh;
369
370 /*
371 * Do consistency checks to verify assumptions
372 * made by code past this point.
373 */
374 if ((m->m_flags & M_PKTHDR) == 0) {
375 if_printf(ifp, "discard frame w/o packet header\n");
376 ifp->if_ierrors++;
377 m_freem(m);
378 return;
379 }
380 if (m->m_pkthdr.rcvif == NULL) {
381 if_printf(ifp, "discard frame w/o interface pointer\n");
382 ifp->if_ierrors++;
383 m_freem(m);
384 return;
385 }
386
387 m = m_pullup(m, FDDI_HDR_LEN);
388 if (m == NULL) {
389 ifp->if_ierrors++;
390 goto dropanyway;
391 }
392 fh = mtod(m, struct fddi_header *);
393
394 /*
395 * Discard packet if interface is not up.
396 */
397 if (!((ifp->if_flags & IFF_UP) &&
398 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
399 goto dropanyway;
400
401 /*
402 * Give bpf a chance at the packet.
403 */
404 BPF_MTAP(ifp, m);
405
406 /*
407 * Interface marked for monitoring; discard packet.
408 */
409 if (ifp->if_flags & IFF_MONITOR) {
410 m_freem(m);
411 return;
412 }
413
414 #ifdef MAC
415 mac_ifnet_create_mbuf(ifp, m);
416 #endif
417
418 /*
419 * Update interface statistics.
420 */
421 ifp->if_ibytes += m->m_pkthdr.len;
422 getmicrotime(&ifp->if_lastchange);
423
424 /*
425 * Discard non local unicast packets when interface
426 * is in promiscuous mode.
427 */
428 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
429 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost,
430 FDDI_ADDR_LEN) != 0))
431 goto dropanyway;
432
433 /*
434 * Set mbuf flags for bcast/mcast.
435 */
436 if (fh->fddi_dhost[0] & 1) {
437 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
438 FDDI_ADDR_LEN) == 0)
439 m->m_flags |= M_BCAST;
440 else
441 m->m_flags |= M_MCAST;
442 ifp->if_imcasts++;
443 }
444
445 #ifdef M_LINK0
446 /*
447 * If this has a LLC priority of 0, then mark it so upper
448 * layers have a hint that it really came via a FDDI/Ethernet
449 * bridge.
450 */
451 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
452 m->m_flags |= M_LINK0;
453 #endif
454
455 /* Strip off FDDI header. */
456 m_adj(m, FDDI_HDR_LEN);
457
458 m = m_pullup(m, LLC_SNAPFRAMELEN);
459 if (m == 0) {
460 ifp->if_ierrors++;
461 goto dropanyway;
462 }
463 l = mtod(m, struct llc *);
464
465 switch (l->llc_dsap) {
466 case LLC_SNAP_LSAP:
467 {
468 u_int16_t type;
469 if ((l->llc_control != LLC_UI) ||
470 (l->llc_ssap != LLC_SNAP_LSAP)) {
471 ifp->if_noproto++;
472 goto dropanyway;
473 }
474 #ifdef NETATALK
475 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code,
476 sizeof(at_org_code)) == 0 &&
477 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) {
478 isr = NETISR_ATALK2;
479 m_adj(m, LLC_SNAPFRAMELEN);
480 break;
481 }
482
483 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code,
484 sizeof(aarp_org_code)) == 0 &&
485 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) {
486 m_adj(m, LLC_SNAPFRAMELEN);
487 isr = NETISR_AARP;
488 break;
489 }
490 #endif /* NETATALK */
491 if (l->llc_snap.org_code[0] != 0 ||
492 l->llc_snap.org_code[1] != 0 ||
493 l->llc_snap.org_code[2] != 0) {
494 ifp->if_noproto++;
495 goto dropanyway;
496 }
497
498 type = ntohs(l->llc_snap.ether_type);
499 m_adj(m, LLC_SNAPFRAMELEN);
500
501 switch (type) {
502 #ifdef INET
503 case ETHERTYPE_IP:
504 if ((m = ip_fastforward(m)) == NULL)
505 return;
506 isr = NETISR_IP;
507 break;
508
509 case ETHERTYPE_ARP:
510 if (ifp->if_flags & IFF_NOARP)
511 goto dropanyway;
512 isr = NETISR_ARP;
513 break;
514 #endif
515 #ifdef INET6
516 case ETHERTYPE_IPV6:
517 isr = NETISR_IPV6;
518 break;
519 #endif
520 #ifdef IPX
521 case ETHERTYPE_IPX:
522 isr = NETISR_IPX;
523 break;
524 #endif
525 #ifdef DECNET
526 case ETHERTYPE_DECNET:
527 isr = NETISR_DECNET;
528 break;
529 #endif
530 #ifdef NETATALK
531 case ETHERTYPE_AT:
532 isr = NETISR_ATALK1;
533 break;
534 case ETHERTYPE_AARP:
535 isr = NETISR_AARP;
536 break;
537 #endif /* NETATALK */
538 default:
539 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
540 ifp->if_noproto++;
541 goto dropanyway;
542 }
543 break;
544 }
545
546 default:
547 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
548 ifp->if_noproto++;
549 goto dropanyway;
550 }
551 M_SETFIB(m, ifp->if_fib);
552 netisr_dispatch(isr, m);
553 return;
554
555 dropanyway:
556 ifp->if_iqdrops++;
557 if (m)
558 m_freem(m);
559 return;
560 }
561
562 /*
563 * Perform common duties while attaching to interface list
564 */
565 void
fddi_ifattach(ifp,lla,bpf)566 fddi_ifattach(ifp, lla, bpf)
567 struct ifnet *ifp;
568 const u_int8_t *lla;
569 int bpf;
570 {
571 struct ifaddr *ifa;
572 struct sockaddr_dl *sdl;
573
574 ifp->if_type = IFT_FDDI;
575 ifp->if_addrlen = FDDI_ADDR_LEN;
576 ifp->if_hdrlen = 21;
577
578 if_attach(ifp); /* Must be called before additional assignments */
579
580 ifp->if_mtu = FDDIMTU;
581 ifp->if_output = fddi_output;
582 ifp->if_input = fddi_input;
583 ifp->if_resolvemulti = fddi_resolvemulti;
584 ifp->if_broadcastaddr = fddibroadcastaddr;
585 ifp->if_baudrate = 100000000;
586 #ifdef IFF_NOTRAILERS
587 ifp->if_flags |= IFF_NOTRAILERS;
588 #endif
589 ifa = ifp->if_addr;
590 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
591
592 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
593 sdl->sdl_type = IFT_FDDI;
594 sdl->sdl_alen = ifp->if_addrlen;
595 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
596
597 if (bpf)
598 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
599
600 return;
601 }
602
603 void
fddi_ifdetach(ifp,bpf)604 fddi_ifdetach(ifp, bpf)
605 struct ifnet *ifp;
606 int bpf;
607 {
608
609 if (bpf)
610 bpfdetach(ifp);
611
612 if_detach(ifp);
613
614 return;
615 }
616
617 int
fddi_ioctl(ifp,command,data)618 fddi_ioctl (ifp, command, data)
619 struct ifnet *ifp;
620 u_long command;
621 caddr_t data;
622 {
623 struct ifaddr *ifa;
624 struct ifreq *ifr;
625 int error;
626
627 ifa = (struct ifaddr *) data;
628 ifr = (struct ifreq *) data;
629 error = 0;
630
631 switch (command) {
632 case SIOCSIFADDR:
633 ifp->if_flags |= IFF_UP;
634
635 switch (ifa->ifa_addr->sa_family) {
636 #ifdef INET
637 case AF_INET: /* before arpwhohas */
638 ifp->if_init(ifp->if_softc);
639 arp_ifinit(ifp, ifa);
640 break;
641 #endif
642 #ifdef IPX
643 /*
644 * XXX - This code is probably wrong
645 */
646 case AF_IPX: {
647 struct ipx_addr *ina;
648
649 ina = &(IA_SIPX(ifa)->sipx_addr);
650
651 if (ipx_nullhost(*ina)) {
652 ina->x_host = *(union ipx_host *)
653 IF_LLADDR(ifp);
654 } else {
655 bcopy((caddr_t) ina->x_host.c_host,
656 (caddr_t) IF_LLADDR(ifp),
657 ETHER_ADDR_LEN);
658 }
659
660 /*
661 * Set new address
662 */
663 ifp->if_init(ifp->if_softc);
664 }
665 break;
666 #endif
667 default:
668 ifp->if_init(ifp->if_softc);
669 break;
670 }
671 break;
672 case SIOCGIFADDR: {
673 struct sockaddr *sa;
674
675 sa = (struct sockaddr *) & ifr->ifr_data;
676 bcopy(IF_LLADDR(ifp),
677 (caddr_t) sa->sa_data, FDDI_ADDR_LEN);
678
679 }
680 break;
681 case SIOCSIFMTU:
682 /*
683 * Set the interface MTU.
684 */
685 if (ifr->ifr_mtu > FDDIMTU) {
686 error = EINVAL;
687 } else {
688 ifp->if_mtu = ifr->ifr_mtu;
689 }
690 break;
691 default:
692 error = EINVAL;
693 break;
694 }
695
696 return (error);
697 }
698
699 static int
fddi_resolvemulti(ifp,llsa,sa)700 fddi_resolvemulti(ifp, llsa, sa)
701 struct ifnet *ifp;
702 struct sockaddr **llsa;
703 struct sockaddr *sa;
704 {
705 struct sockaddr_dl *sdl;
706 #ifdef INET
707 struct sockaddr_in *sin;
708 #endif
709 #ifdef INET6
710 struct sockaddr_in6 *sin6;
711 #endif
712 u_char *e_addr;
713
714 switch(sa->sa_family) {
715 case AF_LINK:
716 /*
717 * No mapping needed. Just check that it's a valid MC address.
718 */
719 sdl = (struct sockaddr_dl *)sa;
720 e_addr = LLADDR(sdl);
721 if ((e_addr[0] & 1) != 1)
722 return (EADDRNOTAVAIL);
723 *llsa = 0;
724 return (0);
725
726 #ifdef INET
727 case AF_INET:
728 sin = (struct sockaddr_in *)sa;
729 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
730 return (EADDRNOTAVAIL);
731 sdl = malloc(sizeof *sdl, M_IFMADDR,
732 M_NOWAIT | M_ZERO);
733 if (sdl == NULL)
734 return (ENOMEM);
735 sdl->sdl_len = sizeof *sdl;
736 sdl->sdl_family = AF_LINK;
737 sdl->sdl_index = ifp->if_index;
738 sdl->sdl_type = IFT_FDDI;
739 sdl->sdl_nlen = 0;
740 sdl->sdl_alen = FDDI_ADDR_LEN;
741 sdl->sdl_slen = 0;
742 e_addr = LLADDR(sdl);
743 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
744 *llsa = (struct sockaddr *)sdl;
745 return (0);
746 #endif
747 #ifdef INET6
748 case AF_INET6:
749 sin6 = (struct sockaddr_in6 *)sa;
750 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
751 /*
752 * An IP6 address of 0 means listen to all
753 * of the Ethernet multicast address used for IP6.
754 * (This is used for multicast routers.)
755 */
756 ifp->if_flags |= IFF_ALLMULTI;
757 *llsa = 0;
758 return (0);
759 }
760 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
761 return (EADDRNOTAVAIL);
762 sdl = malloc(sizeof *sdl, M_IFMADDR,
763 M_NOWAIT | M_ZERO);
764 if (sdl == NULL)
765 return (ENOMEM);
766 sdl->sdl_len = sizeof *sdl;
767 sdl->sdl_family = AF_LINK;
768 sdl->sdl_index = ifp->if_index;
769 sdl->sdl_type = IFT_FDDI;
770 sdl->sdl_nlen = 0;
771 sdl->sdl_alen = FDDI_ADDR_LEN;
772 sdl->sdl_slen = 0;
773 e_addr = LLADDR(sdl);
774 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
775 *llsa = (struct sockaddr *)sdl;
776 return (0);
777 #endif
778
779 default:
780 /*
781 * Well, the text isn't quite right, but it's the name
782 * that counts...
783 */
784 return (EAFNOSUPPORT);
785 }
786
787 return (0);
788 }
789
790 static moduledata_t fddi_mod = {
791 "fddi", /* module name */
792 NULL, /* event handler */
793 0 /* extra data */
794 };
795
796 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
797 MODULE_VERSION(fddi, 1);
798