FreeBSD/Linux Kernel Cross Reference
sys/net/if_fddisubr.c
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: releng/9.1/sys/net/if_fddisubr.c 223741 2011-07-03 16:08:38Z bz $
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 *, 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
113 fddi_output(ifp, m, dst, ro)
114 struct ifnet *ifp;
115 struct mbuf *m;
116 struct sockaddr *dst;
117 struct route *ro;
118 {
119 u_int16_t type;
120 int loop_copy = 0, error = 0, hdrcmplt = 0;
121 u_char esrc[FDDI_ADDR_LEN], edst[FDDI_ADDR_LEN];
122 struct fddi_header *fh;
123 #if defined(INET) || defined(INET6)
124 struct llentry *lle;
125 #endif
126
127 #ifdef MAC
128 error = mac_ifnet_check_transmit(ifp, m);
129 if (error)
130 senderr(error);
131 #endif
132
133 if (ifp->if_flags & IFF_MONITOR)
134 senderr(ENETDOWN);
135 if (!((ifp->if_flags & IFF_UP) &&
136 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
137 senderr(ENETDOWN);
138 getmicrotime(&ifp->if_lastchange);
139
140 switch (dst->sa_family) {
141 #ifdef INET
142 case AF_INET: {
143 struct rtentry *rt0 = NULL;
144
145 if (ro != NULL)
146 rt0 = ro->ro_rt;
147 error = arpresolve(ifp, rt0, m, dst, edst, &lle);
148 if (error)
149 return (error == EWOULDBLOCK ? 0 : error);
150 type = htons(ETHERTYPE_IP);
151 break;
152 }
153 case AF_ARP:
154 {
155 struct arphdr *ah;
156 ah = mtod(m, struct arphdr *);
157 ah->ar_hrd = htons(ARPHRD_ETHER);
158
159 loop_copy = -1; /* if this is for us, don't do it */
160
161 switch (ntohs(ah->ar_op)) {
162 case ARPOP_REVREQUEST:
163 case ARPOP_REVREPLY:
164 type = htons(ETHERTYPE_REVARP);
165 break;
166 case ARPOP_REQUEST:
167 case ARPOP_REPLY:
168 default:
169 type = htons(ETHERTYPE_ARP);
170 break;
171 }
172
173 if (m->m_flags & M_BCAST)
174 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
175 else
176 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
177
178 }
179 break;
180 #endif /* INET */
181 #ifdef INET6
182 case AF_INET6:
183 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
184 if (error)
185 return (error); /* Something bad happened */
186 type = htons(ETHERTYPE_IPV6);
187 break;
188 #endif /* INET6 */
189 #ifdef IPX
190 case AF_IPX:
191 type = htons(ETHERTYPE_IPX);
192 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
193 (caddr_t)edst, FDDI_ADDR_LEN);
194 break;
195 #endif /* IPX */
196 #ifdef NETATALK
197 case AF_APPLETALK: {
198 struct at_ifaddr *aa;
199 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst))
200 return (0);
201 /*
202 * ifaddr is the first thing in at_ifaddr
203 */
204 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0)
205 goto bad;
206
207 /*
208 * In the phase 2 case, we need to prepend an mbuf for the llc header.
209 * Since we must preserve the value of m, which is passed to us by
210 * value, we m_copy() the first mbuf, and use it for our llc header.
211 */
212 if (aa->aa_flags & AFA_PHASE2) {
213 struct llc llc;
214
215 M_PREPEND(m, LLC_SNAPFRAMELEN, M_WAIT);
216 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
217 llc.llc_control = LLC_UI;
218 bcopy(at_org_code, llc.llc_snap.org_code, sizeof(at_org_code));
219 llc.llc_snap.ether_type = htons(ETHERTYPE_AT);
220 bcopy(&llc, mtod(m, caddr_t), LLC_SNAPFRAMELEN);
221 type = 0;
222 } else {
223 type = htons(ETHERTYPE_AT);
224 }
225 ifa_free(&aa->aa_ifa);
226 break;
227 }
228 #endif /* NETATALK */
229
230 case pseudo_AF_HDRCMPLT:
231 {
232 struct ether_header *eh;
233 hdrcmplt = 1;
234 eh = (struct ether_header *)dst->sa_data;
235 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN);
236 /* FALLTHROUGH */
237 }
238
239 case AF_UNSPEC:
240 {
241 struct ether_header *eh;
242 loop_copy = -1;
243 eh = (struct ether_header *)dst->sa_data;
244 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN);
245 if (*edst & 1)
246 m->m_flags |= (M_BCAST|M_MCAST);
247 type = eh->ether_type;
248 break;
249 }
250
251 case AF_IMPLINK:
252 {
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)
259 goto bad;
260 break;
261 }
262 case FDDIFC_LLC_SYNC: {
263 /* FDDIFC_Z bits reserved, must be zero */
264 if (fh->fddi_fc & FDDIFC_Z)
265 goto bad;
266 break;
267 }
268 case FDDIFC_SMT: {
269 /* FDDIFC_Z bits must be non zero */
270 if ((fh->fddi_fc & FDDIFC_Z) == 0)
271 goto bad;
272 break;
273 }
274 default: {
275 /* anything else is too dangerous */
276 goto bad;
277 }
278 }
279 error = 0;
280 if (fh->fddi_dhost[0] & 1)
281 m->m_flags |= (M_BCAST|M_MCAST);
282 goto queue_it;
283 }
284 default:
285 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
286 senderr(EAFNOSUPPORT);
287 }
288
289 /*
290 * Add LLC header.
291 */
292 if (type != 0) {
293 struct llc *l;
294 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
295 if (m == 0)
296 senderr(ENOBUFS);
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);
304 }
305
306 /*
307 * Add local net header. If no space in first mbuf,
308 * allocate another.
309 */
310 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT);
311 if (m == 0)
312 senderr(ENOBUFS);
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);
316 queue_it:
317 if (hdrcmplt)
318 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
319 else
320 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
321 FDDI_ADDR_LEN);
322
323 /*
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.
331 */
332 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
333 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
334 struct mbuf *n;
335 n = m_copy(m, 0, (int)M_COPYALL);
336 (void) if_simloop(ifp, n, dst->sa_family,
337 FDDI_HDR_LEN);
338 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
339 FDDI_ADDR_LEN) == 0) {
340 (void) if_simloop(ifp, m, dst->sa_family,
341 FDDI_HDR_LEN);
342 return (0); /* XXX */
343 }
344 }
345
346 error = (ifp->if_transmit)(ifp, m);
347 if (error)
348 ifp->if_oerrors++;
349
350 return (error);
351
352 bad:
353 ifp->if_oerrors++;
354 if (m)
355 m_freem(m);
356 return (error);
357 }
358
359 /*
360 * Process a received FDDI packet.
361 */
362 static void
363 fddi_input(ifp, m)
364 struct ifnet *ifp;
365 struct mbuf *m;
366 {
367 int isr;
368 struct llc *l;
369 struct fddi_header *fh;
370
371 /*
372 * Do consistency checks to verify assumptions
373 * made by code past this point.
374 */
375 if ((m->m_flags & M_PKTHDR) == 0) {
376 if_printf(ifp, "discard frame w/o packet header\n");
377 ifp->if_ierrors++;
378 m_freem(m);
379 return;
380 }
381 if (m->m_pkthdr.rcvif == NULL) {
382 if_printf(ifp, "discard frame w/o interface pointer\n");
383 ifp->if_ierrors++;
384 m_freem(m);
385 return;
386 }
387
388 m = m_pullup(m, FDDI_HDR_LEN);
389 if (m == NULL) {
390 ifp->if_ierrors++;
391 goto dropanyway;
392 }
393 fh = mtod(m, struct fddi_header *);
394 m->m_pkthdr.header = (void *)fh;
395
396 /*
397 * Discard packet if interface is not up.
398 */
399 if (!((ifp->if_flags & IFF_UP) &&
400 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
401 goto dropanyway;
402
403 /*
404 * Give bpf a chance at the packet.
405 */
406 BPF_MTAP(ifp, m);
407
408 /*
409 * Interface marked for monitoring; discard packet.
410 */
411 if (ifp->if_flags & IFF_MONITOR) {
412 m_freem(m);
413 return;
414 }
415
416 #ifdef MAC
417 mac_ifnet_create_mbuf(ifp, m);
418 #endif
419
420 /*
421 * Update interface statistics.
422 */
423 ifp->if_ibytes += m->m_pkthdr.len;
424 getmicrotime(&ifp->if_lastchange);
425
426 /*
427 * Discard non local unicast packets when interface
428 * is in promiscuous mode.
429 */
430 if ((ifp->if_flags & IFF_PROMISC) && ((fh->fddi_dhost[0] & 1) == 0) &&
431 (bcmp(IF_LLADDR(ifp), (caddr_t)fh->fddi_dhost,
432 FDDI_ADDR_LEN) != 0))
433 goto dropanyway;
434
435 /*
436 * Set mbuf flags for bcast/mcast.
437 */
438 if (fh->fddi_dhost[0] & 1) {
439 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
440 FDDI_ADDR_LEN) == 0)
441 m->m_flags |= M_BCAST;
442 else
443 m->m_flags |= M_MCAST;
444 ifp->if_imcasts++;
445 }
446
447 #ifdef M_LINK0
448 /*
449 * If this has a LLC priority of 0, then mark it so upper
450 * layers have a hint that it really came via a FDDI/Ethernet
451 * bridge.
452 */
453 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
454 m->m_flags |= M_LINK0;
455 #endif
456
457 /* Strip off FDDI header. */
458 m_adj(m, FDDI_HDR_LEN);
459
460 m = m_pullup(m, LLC_SNAPFRAMELEN);
461 if (m == 0) {
462 ifp->if_ierrors++;
463 goto dropanyway;
464 }
465 l = mtod(m, struct llc *);
466
467 switch (l->llc_dsap) {
468 case LLC_SNAP_LSAP:
469 {
470 u_int16_t type;
471 if ((l->llc_control != LLC_UI) ||
472 (l->llc_ssap != LLC_SNAP_LSAP)) {
473 ifp->if_noproto++;
474 goto dropanyway;
475 }
476 #ifdef NETATALK
477 if (bcmp(&(l->llc_snap.org_code)[0], at_org_code,
478 sizeof(at_org_code)) == 0 &&
479 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AT) {
480 isr = NETISR_ATALK2;
481 m_adj(m, LLC_SNAPFRAMELEN);
482 break;
483 }
484
485 if (bcmp(&(l->llc_snap.org_code)[0], aarp_org_code,
486 sizeof(aarp_org_code)) == 0 &&
487 ntohs(l->llc_snap.ether_type) == ETHERTYPE_AARP) {
488 m_adj(m, LLC_SNAPFRAMELEN);
489 isr = NETISR_AARP;
490 break;
491 }
492 #endif /* NETATALK */
493 if (l->llc_snap.org_code[0] != 0 ||
494 l->llc_snap.org_code[1] != 0 ||
495 l->llc_snap.org_code[2] != 0) {
496 ifp->if_noproto++;
497 goto dropanyway;
498 }
499
500 type = ntohs(l->llc_snap.ether_type);
501 m_adj(m, LLC_SNAPFRAMELEN);
502
503 switch (type) {
504 #ifdef INET
505 case ETHERTYPE_IP:
506 if ((m = ip_fastforward(m)) == NULL)
507 return;
508 isr = NETISR_IP;
509 break;
510
511 case ETHERTYPE_ARP:
512 if (ifp->if_flags & IFF_NOARP)
513 goto dropanyway;
514 isr = NETISR_ARP;
515 break;
516 #endif
517 #ifdef INET6
518 case ETHERTYPE_IPV6:
519 isr = NETISR_IPV6;
520 break;
521 #endif
522 #ifdef IPX
523 case ETHERTYPE_IPX:
524 isr = NETISR_IPX;
525 break;
526 #endif
527 #ifdef DECNET
528 case ETHERTYPE_DECNET:
529 isr = NETISR_DECNET;
530 break;
531 #endif
532 #ifdef NETATALK
533 case ETHERTYPE_AT:
534 isr = NETISR_ATALK1;
535 break;
536 case ETHERTYPE_AARP:
537 isr = NETISR_AARP;
538 break;
539 #endif /* NETATALK */
540 default:
541 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
542 ifp->if_noproto++;
543 goto dropanyway;
544 }
545 break;
546 }
547
548 default:
549 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
550 ifp->if_noproto++;
551 goto dropanyway;
552 }
553 M_SETFIB(m, ifp->if_fib);
554 netisr_dispatch(isr, m);
555 return;
556
557 dropanyway:
558 ifp->if_iqdrops++;
559 if (m)
560 m_freem(m);
561 return;
562 }
563
564 /*
565 * Perform common duties while attaching to interface list
566 */
567 void
568 fddi_ifattach(ifp, lla, bpf)
569 struct ifnet *ifp;
570 const u_int8_t *lla;
571 int bpf;
572 {
573 struct ifaddr *ifa;
574 struct sockaddr_dl *sdl;
575
576 ifp->if_type = IFT_FDDI;
577 ifp->if_addrlen = FDDI_ADDR_LEN;
578 ifp->if_hdrlen = 21;
579
580 if_attach(ifp); /* Must be called before additional assignments */
581
582 ifp->if_mtu = FDDIMTU;
583 ifp->if_output = fddi_output;
584 ifp->if_input = fddi_input;
585 ifp->if_resolvemulti = fddi_resolvemulti;
586 ifp->if_broadcastaddr = fddibroadcastaddr;
587 ifp->if_baudrate = 100000000;
588 #ifdef IFF_NOTRAILERS
589 ifp->if_flags |= IFF_NOTRAILERS;
590 #endif
591 ifa = ifp->if_addr;
592 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
593
594 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
595 sdl->sdl_type = IFT_FDDI;
596 sdl->sdl_alen = ifp->if_addrlen;
597 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
598
599 if (bpf)
600 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
601
602 return;
603 }
604
605 void
606 fddi_ifdetach(ifp, bpf)
607 struct ifnet *ifp;
608 int bpf;
609 {
610
611 if (bpf)
612 bpfdetach(ifp);
613
614 if_detach(ifp);
615
616 return;
617 }
618
619 int
620 fddi_ioctl (ifp, command, data)
621 struct ifnet *ifp;
622 u_long command;
623 caddr_t data;
624 {
625 struct ifaddr *ifa;
626 struct ifreq *ifr;
627 int error;
628
629 ifa = (struct ifaddr *) data;
630 ifr = (struct ifreq *) data;
631 error = 0;
632
633 switch (command) {
634 case SIOCSIFADDR:
635 ifp->if_flags |= IFF_UP;
636
637 switch (ifa->ifa_addr->sa_family) {
638 #ifdef INET
639 case AF_INET: /* before arpwhohas */
640 ifp->if_init(ifp->if_softc);
641 arp_ifinit(ifp, ifa);
642 break;
643 #endif
644 #ifdef IPX
645 /*
646 * XXX - This code is probably wrong
647 */
648 case AF_IPX: {
649 struct ipx_addr *ina;
650
651 ina = &(IA_SIPX(ifa)->sipx_addr);
652
653 if (ipx_nullhost(*ina)) {
654 ina->x_host = *(union ipx_host *)
655 IF_LLADDR(ifp);
656 } else {
657 bcopy((caddr_t) ina->x_host.c_host,
658 (caddr_t) IF_LLADDR(ifp),
659 ETHER_ADDR_LEN);
660 }
661
662 /*
663 * Set new address
664 */
665 ifp->if_init(ifp->if_softc);
666 }
667 break;
668 #endif
669 default:
670 ifp->if_init(ifp->if_softc);
671 break;
672 }
673 break;
674 case SIOCGIFADDR: {
675 struct sockaddr *sa;
676
677 sa = (struct sockaddr *) & ifr->ifr_data;
678 bcopy(IF_LLADDR(ifp),
679 (caddr_t) sa->sa_data, FDDI_ADDR_LEN);
680
681 }
682 break;
683 case SIOCSIFMTU:
684 /*
685 * Set the interface MTU.
686 */
687 if (ifr->ifr_mtu > FDDIMTU) {
688 error = EINVAL;
689 } else {
690 ifp->if_mtu = ifr->ifr_mtu;
691 }
692 break;
693 default:
694 error = EINVAL;
695 break;
696 }
697
698 return (error);
699 }
700
701 static int
702 fddi_resolvemulti(ifp, llsa, sa)
703 struct ifnet *ifp;
704 struct sockaddr **llsa;
705 struct sockaddr *sa;
706 {
707 struct sockaddr_dl *sdl;
708 #ifdef INET
709 struct sockaddr_in *sin;
710 #endif
711 #ifdef INET6
712 struct sockaddr_in6 *sin6;
713 #endif
714 u_char *e_addr;
715
716 switch(sa->sa_family) {
717 case AF_LINK:
718 /*
719 * No mapping needed. Just check that it's a valid MC address.
720 */
721 sdl = (struct sockaddr_dl *)sa;
722 e_addr = LLADDR(sdl);
723 if ((e_addr[0] & 1) != 1)
724 return (EADDRNOTAVAIL);
725 *llsa = 0;
726 return (0);
727
728 #ifdef INET
729 case AF_INET:
730 sin = (struct sockaddr_in *)sa;
731 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
732 return (EADDRNOTAVAIL);
733 sdl = malloc(sizeof *sdl, M_IFMADDR,
734 M_NOWAIT | M_ZERO);
735 if (sdl == NULL)
736 return (ENOMEM);
737 sdl->sdl_len = sizeof *sdl;
738 sdl->sdl_family = AF_LINK;
739 sdl->sdl_index = ifp->if_index;
740 sdl->sdl_type = IFT_FDDI;
741 sdl->sdl_nlen = 0;
742 sdl->sdl_alen = FDDI_ADDR_LEN;
743 sdl->sdl_slen = 0;
744 e_addr = LLADDR(sdl);
745 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
746 *llsa = (struct sockaddr *)sdl;
747 return (0);
748 #endif
749 #ifdef INET6
750 case AF_INET6:
751 sin6 = (struct sockaddr_in6 *)sa;
752 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
753 /*
754 * An IP6 address of 0 means listen to all
755 * of the Ethernet multicast address used for IP6.
756 * (This is used for multicast routers.)
757 */
758 ifp->if_flags |= IFF_ALLMULTI;
759 *llsa = 0;
760 return (0);
761 }
762 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
763 return (EADDRNOTAVAIL);
764 sdl = malloc(sizeof *sdl, M_IFMADDR,
765 M_NOWAIT | M_ZERO);
766 if (sdl == NULL)
767 return (ENOMEM);
768 sdl->sdl_len = sizeof *sdl;
769 sdl->sdl_family = AF_LINK;
770 sdl->sdl_index = ifp->if_index;
771 sdl->sdl_type = IFT_FDDI;
772 sdl->sdl_nlen = 0;
773 sdl->sdl_alen = FDDI_ADDR_LEN;
774 sdl->sdl_slen = 0;
775 e_addr = LLADDR(sdl);
776 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
777 *llsa = (struct sockaddr *)sdl;
778 return (0);
779 #endif
780
781 default:
782 /*
783 * Well, the text isn't quite right, but it's the name
784 * that counts...
785 */
786 return (EAFNOSUPPORT);
787 }
788
789 return (0);
790 }
791
792 static moduledata_t fddi_mod = {
793 "fddi", /* module name */
794 NULL, /* event handler */
795 0 /* extra data */
796 };
797
798 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
799 MODULE_VERSION(fddi, 1);
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