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: src/sys/net/if_fddisubr.c,v 1.108 2008/11/06 09:07:56 bz Exp $
37 */
38
39 #include "opt_atalk.h"
40 #include "opt_inet.h"
41 #include "opt_inet6.h"
42 #include "opt_ipx.h"
43 #include "opt_mac.h"
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/malloc.h>
49 #include <sys/mbuf.h>
50 #include <sys/module.h>
51 #include <sys/socket.h>
52 #include <sys/sockio.h>
53
54 #include <net/if.h>
55 #include <net/if_dl.h>
56 #include <net/if_llc.h>
57 #include <net/if_types.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 rtentry *);
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, rt0)
114 struct ifnet *ifp;
115 struct mbuf *m;
116 struct sockaddr *dst;
117 struct rtentry *rt0;
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
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 error = arpresolve(ifp, rt0, m, dst, edst);
141 if (error)
142 return (error == EWOULDBLOCK ? 0 : error);
143 type = htons(ETHERTYPE_IP);
144 break;
145 }
146 case AF_ARP:
147 {
148 struct arphdr *ah;
149 ah = mtod(m, struct arphdr *);
150 ah->ar_hrd = htons(ARPHRD_ETHER);
151
152 loop_copy = -1; /* if this is for us, don't do it */
153
154 switch (ntohs(ah->ar_op)) {
155 case ARPOP_REVREQUEST:
156 case ARPOP_REVREPLY:
157 type = htons(ETHERTYPE_REVARP);
158 break;
159 case ARPOP_REQUEST:
160 case ARPOP_REPLY:
161 default:
162 type = htons(ETHERTYPE_ARP);
163 break;
164 }
165
166 if (m->m_flags & M_BCAST)
167 bcopy(ifp->if_broadcastaddr, edst, FDDI_ADDR_LEN);
168 else
169 bcopy(ar_tha(ah), edst, FDDI_ADDR_LEN);
170
171 }
172 break;
173 #endif /* INET */
174 #ifdef INET6
175 case AF_INET6:
176 error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst);
177 if (error)
178 return (error); /* Something bad happened */
179 type = htons(ETHERTYPE_IPV6);
180 break;
181 #endif /* INET6 */
182 #ifdef IPX
183 case AF_IPX:
184 type = htons(ETHERTYPE_IPX);
185 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
186 (caddr_t)edst, FDDI_ADDR_LEN);
187 break;
188 #endif /* IPX */
189 #ifdef NETATALK
190 case AF_APPLETALK: {
191 struct at_ifaddr *aa;
192 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst))
193 return (0);
194 /*
195 * ifaddr is the first thing in at_ifaddr
196 */
197 if ((aa = at_ifawithnet( (struct sockaddr_at *)dst)) == 0)
198 goto bad;
199
200 /*
201 * In the phase 2 case, we need to prepend an mbuf for the llc header.
202 * Since we must preserve the value of m, which is passed to us by
203 * value, we m_copy() the first mbuf, and use it for our llc header.
204 */
205 if (aa->aa_flags & AFA_PHASE2) {
206 struct llc llc;
207
208 M_PREPEND(m, LLC_SNAPFRAMELEN, M_WAIT);
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);
214 type = 0;
215 } else {
216 type = htons(ETHERTYPE_AT);
217 }
218 break;
219 }
220 #endif /* NETATALK */
221
222 case pseudo_AF_HDRCMPLT:
223 {
224 struct ether_header *eh;
225 hdrcmplt = 1;
226 eh = (struct ether_header *)dst->sa_data;
227 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, FDDI_ADDR_LEN);
228 /* FALLTHROUGH */
229 }
230
231 case AF_UNSPEC:
232 {
233 struct ether_header *eh;
234 loop_copy = -1;
235 eh = (struct ether_header *)dst->sa_data;
236 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, FDDI_ADDR_LEN);
237 if (*edst & 1)
238 m->m_flags |= (M_BCAST|M_MCAST);
239 type = eh->ether_type;
240 break;
241 }
242
243 case AF_IMPLINK:
244 {
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)
251 goto bad;
252 break;
253 }
254 case FDDIFC_LLC_SYNC: {
255 /* FDDIFC_Z bits reserved, must be zero */
256 if (fh->fddi_fc & FDDIFC_Z)
257 goto bad;
258 break;
259 }
260 case FDDIFC_SMT: {
261 /* FDDIFC_Z bits must be non zero */
262 if ((fh->fddi_fc & FDDIFC_Z) == 0)
263 goto bad;
264 break;
265 }
266 default: {
267 /* anything else is too dangerous */
268 goto bad;
269 }
270 }
271 error = 0;
272 if (fh->fddi_dhost[0] & 1)
273 m->m_flags |= (M_BCAST|M_MCAST);
274 goto queue_it;
275 }
276 default:
277 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
278 senderr(EAFNOSUPPORT);
279 }
280
281 /*
282 * Add LLC header.
283 */
284 if (type != 0) {
285 struct llc *l;
286 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
287 if (m == 0)
288 senderr(ENOBUFS);
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);
296 }
297
298 /*
299 * Add local net header. If no space in first mbuf,
300 * allocate another.
301 */
302 M_PREPEND(m, FDDI_HDR_LEN, M_DONTWAIT);
303 if (m == 0)
304 senderr(ENOBUFS);
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);
308 queue_it:
309 if (hdrcmplt)
310 bcopy((caddr_t)esrc, (caddr_t)fh->fddi_shost, FDDI_ADDR_LEN);
311 else
312 bcopy(IF_LLADDR(ifp), (caddr_t)fh->fddi_shost,
313 FDDI_ADDR_LEN);
314
315 /*
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.
323 */
324 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
325 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
326 struct mbuf *n;
327 n = m_copy(m, 0, (int)M_COPYALL);
328 (void) if_simloop(ifp, n, dst->sa_family,
329 FDDI_HDR_LEN);
330 } else if (bcmp(fh->fddi_dhost, fh->fddi_shost,
331 FDDI_ADDR_LEN) == 0) {
332 (void) if_simloop(ifp, m, dst->sa_family,
333 FDDI_HDR_LEN);
334 return (0); /* XXX */
335 }
336 }
337
338 IFQ_HANDOFF(ifp, m, error);
339 if (error)
340 ifp->if_oerrors++;
341
342 return (error);
343
344 bad:
345 ifp->if_oerrors++;
346 if (m)
347 m_freem(m);
348 return (error);
349 }
350
351 /*
352 * Process a received FDDI packet.
353 */
354 static void
355 fddi_input(ifp, m)
356 struct ifnet *ifp;
357 struct mbuf *m;
358 {
359 int isr;
360 struct llc *l;
361 struct fddi_header *fh;
362
363 /*
364 * Do consistency checks to verify assumptions
365 * made by code past this point.
366 */
367 if ((m->m_flags & M_PKTHDR) == 0) {
368 if_printf(ifp, "discard frame w/o packet header\n");
369 ifp->if_ierrors++;
370 m_freem(m);
371 return;
372 }
373 if (m->m_pkthdr.rcvif == NULL) {
374 if_printf(ifp, "discard frame w/o interface pointer\n");
375 ifp->if_ierrors++;
376 m_freem(m);
377 return;
378 }
379
380 m = m_pullup(m, FDDI_HDR_LEN);
381 if (m == NULL) {
382 ifp->if_ierrors++;
383 goto dropanyway;
384 }
385 fh = mtod(m, struct fddi_header *);
386 m->m_pkthdr.header = (void *)fh;
387
388 /*
389 * Discard packet if interface is not up.
390 */
391 if (!((ifp->if_flags & IFF_UP) &&
392 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
393 goto dropanyway;
394
395 /*
396 * Give bpf a chance at the packet.
397 */
398 BPF_MTAP(ifp, m);
399
400 /*
401 * Interface marked for monitoring; discard packet.
402 */
403 if (ifp->if_flags & IFF_MONITOR) {
404 m_freem(m);
405 return;
406 }
407
408 #ifdef MAC
409 mac_ifnet_create_mbuf(ifp, m);
410 #endif
411
412 /*
413 * Update interface statistics.
414 */
415 ifp->if_ibytes += m->m_pkthdr.len;
416 getmicrotime(&ifp->if_lastchange);
417
418 /*
419 * Discard non local unicast packets when interface
420 * is in promiscuous mode.
421 */
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))
425 goto dropanyway;
426
427 /*
428 * Set mbuf flags for bcast/mcast.
429 */
430 if (fh->fddi_dhost[0] & 1) {
431 if (bcmp(ifp->if_broadcastaddr, fh->fddi_dhost,
432 FDDI_ADDR_LEN) == 0)
433 m->m_flags |= M_BCAST;
434 else
435 m->m_flags |= M_MCAST;
436 ifp->if_imcasts++;
437 }
438
439 #ifdef M_LINK0
440 /*
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
443 * bridge.
444 */
445 if ((fh->fddi_fc & FDDIFC_LLC_PRIO7) == FDDIFC_LLC_PRIO0)
446 m->m_flags |= M_LINK0;
447 #endif
448
449 /* Strip off FDDI header. */
450 m_adj(m, FDDI_HDR_LEN);
451
452 m = m_pullup(m, LLC_SNAPFRAMELEN);
453 if (m == 0) {
454 ifp->if_ierrors++;
455 goto dropanyway;
456 }
457 l = mtod(m, struct llc *);
458
459 switch (l->llc_dsap) {
460 case LLC_SNAP_LSAP:
461 {
462 u_int16_t type;
463 if ((l->llc_control != LLC_UI) ||
464 (l->llc_ssap != LLC_SNAP_LSAP)) {
465 ifp->if_noproto++;
466 goto dropanyway;
467 }
468 #ifdef NETATALK
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) {
472 isr = NETISR_ATALK2;
473 m_adj(m, LLC_SNAPFRAMELEN);
474 break;
475 }
476
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);
481 isr = NETISR_AARP;
482 break;
483 }
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) {
488 ifp->if_noproto++;
489 goto dropanyway;
490 }
491
492 type = ntohs(l->llc_snap.ether_type);
493 m_adj(m, LLC_SNAPFRAMELEN);
494
495 switch (type) {
496 #ifdef INET
497 case ETHERTYPE_IP:
498 if ((m = ip_fastforward(m)) == NULL)
499 return;
500 isr = NETISR_IP;
501 break;
502
503 case ETHERTYPE_ARP:
504 if (ifp->if_flags & IFF_NOARP)
505 goto dropanyway;
506 isr = NETISR_ARP;
507 break;
508 #endif
509 #ifdef INET6
510 case ETHERTYPE_IPV6:
511 isr = NETISR_IPV6;
512 break;
513 #endif
514 #ifdef IPX
515 case ETHERTYPE_IPX:
516 isr = NETISR_IPX;
517 break;
518 #endif
519 #ifdef DECNET
520 case ETHERTYPE_DECNET:
521 isr = NETISR_DECNET;
522 break;
523 #endif
524 #ifdef NETATALK
525 case ETHERTYPE_AT:
526 isr = NETISR_ATALK1;
527 break;
528 case ETHERTYPE_AARP:
529 isr = NETISR_AARP;
530 break;
531 #endif /* NETATALK */
532 default:
533 /* printf("fddi_input: unknown protocol 0x%x\n", type); */
534 ifp->if_noproto++;
535 goto dropanyway;
536 }
537 break;
538 }
539
540 default:
541 /* printf("fddi_input: unknown dsap 0x%x\n", l->llc_dsap); */
542 ifp->if_noproto++;
543 goto dropanyway;
544 }
545 netisr_dispatch(isr, m);
546 return;
547
548 dropanyway:
549 ifp->if_iqdrops++;
550 if (m)
551 m_freem(m);
552 return;
553 }
554
555 /*
556 * Perform common duties while attaching to interface list
557 */
558 void
559 fddi_ifattach(ifp, lla, bpf)
560 struct ifnet *ifp;
561 const u_int8_t *lla;
562 int bpf;
563 {
564 struct ifaddr *ifa;
565 struct sockaddr_dl *sdl;
566
567 ifp->if_type = IFT_FDDI;
568 ifp->if_addrlen = FDDI_ADDR_LEN;
569 ifp->if_hdrlen = 21;
570
571 if_attach(ifp); /* Must be called before additional assignments */
572
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;
581 #endif
582 ifa = ifp->if_addr;
583 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
584
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);
589
590 if (bpf)
591 bpfattach(ifp, DLT_FDDI, FDDI_HDR_LEN);
592
593 return;
594 }
595
596 void
597 fddi_ifdetach(ifp, bpf)
598 struct ifnet *ifp;
599 int bpf;
600 {
601
602 if (bpf)
603 bpfdetach(ifp);
604
605 if_detach(ifp);
606
607 return;
608 }
609
610 int
611 fddi_ioctl (ifp, command, data)
612 struct ifnet *ifp;
613 int command;
614 caddr_t data;
615 {
616 struct ifaddr *ifa;
617 struct ifreq *ifr;
618 int error;
619
620 ifa = (struct ifaddr *) data;
621 ifr = (struct ifreq *) data;
622 error = 0;
623
624 switch (command) {
625 case SIOCSIFADDR:
626 ifp->if_flags |= IFF_UP;
627
628 switch (ifa->ifa_addr->sa_family) {
629 #ifdef INET
630 case AF_INET: /* before arpwhohas */
631 ifp->if_init(ifp->if_softc);
632 arp_ifinit(ifp, ifa);
633 break;
634 #endif
635 #ifdef IPX
636 /*
637 * XXX - This code is probably wrong
638 */
639 case AF_IPX: {
640 struct ipx_addr *ina;
641
642 ina = &(IA_SIPX(ifa)->sipx_addr);
643
644 if (ipx_nullhost(*ina)) {
645 ina->x_host = *(union ipx_host *)
646 IF_LLADDR(ifp);
647 } else {
648 bcopy((caddr_t) ina->x_host.c_host,
649 (caddr_t) IF_LLADDR(ifp),
650 ETHER_ADDR_LEN);
651 }
652
653 /*
654 * Set new address
655 */
656 ifp->if_init(ifp->if_softc);
657 }
658 break;
659 #endif
660 default:
661 ifp->if_init(ifp->if_softc);
662 break;
663 }
664 break;
665 case SIOCGIFADDR: {
666 struct sockaddr *sa;
667
668 sa = (struct sockaddr *) & ifr->ifr_data;
669 bcopy(IF_LLADDR(ifp),
670 (caddr_t) sa->sa_data, FDDI_ADDR_LEN);
671
672 }
673 break;
674 case SIOCSIFMTU:
675 /*
676 * Set the interface MTU.
677 */
678 if (ifr->ifr_mtu > FDDIMTU) {
679 error = EINVAL;
680 } else {
681 ifp->if_mtu = ifr->ifr_mtu;
682 }
683 break;
684 default:
685 error = EINVAL;
686 break;
687 }
688
689 return (error);
690 }
691
692 static int
693 fddi_resolvemulti(ifp, llsa, sa)
694 struct ifnet *ifp;
695 struct sockaddr **llsa;
696 struct sockaddr *sa;
697 {
698 struct sockaddr_dl *sdl;
699 #ifdef INET
700 struct sockaddr_in *sin;
701 #endif
702 #ifdef INET6
703 struct sockaddr_in6 *sin6;
704 #endif
705 u_char *e_addr;
706
707 switch(sa->sa_family) {
708 case AF_LINK:
709 /*
710 * No mapping needed. Just check that it's a valid MC address.
711 */
712 sdl = (struct sockaddr_dl *)sa;
713 e_addr = LLADDR(sdl);
714 if ((e_addr[0] & 1) != 1)
715 return (EADDRNOTAVAIL);
716 *llsa = 0;
717 return (0);
718
719 #ifdef INET
720 case AF_INET:
721 sin = (struct sockaddr_in *)sa;
722 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
723 return (EADDRNOTAVAIL);
724 sdl = malloc(sizeof *sdl, M_IFMADDR,
725 M_NOWAIT | M_ZERO);
726 if (sdl == NULL)
727 return (ENOMEM);
728 sdl->sdl_len = sizeof *sdl;
729 sdl->sdl_family = AF_LINK;
730 sdl->sdl_index = ifp->if_index;
731 sdl->sdl_type = IFT_FDDI;
732 sdl->sdl_nlen = 0;
733 sdl->sdl_alen = FDDI_ADDR_LEN;
734 sdl->sdl_slen = 0;
735 e_addr = LLADDR(sdl);
736 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
737 *llsa = (struct sockaddr *)sdl;
738 return (0);
739 #endif
740 #ifdef INET6
741 case AF_INET6:
742 sin6 = (struct sockaddr_in6 *)sa;
743 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
744 /*
745 * An IP6 address of 0 means listen to all
746 * of the Ethernet multicast address used for IP6.
747 * (This is used for multicast routers.)
748 */
749 ifp->if_flags |= IFF_ALLMULTI;
750 *llsa = 0;
751 return (0);
752 }
753 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
754 return (EADDRNOTAVAIL);
755 sdl = malloc(sizeof *sdl, M_IFMADDR,
756 M_NOWAIT | M_ZERO);
757 if (sdl == NULL)
758 return (ENOMEM);
759 sdl->sdl_len = sizeof *sdl;
760 sdl->sdl_family = AF_LINK;
761 sdl->sdl_index = ifp->if_index;
762 sdl->sdl_type = IFT_FDDI;
763 sdl->sdl_nlen = 0;
764 sdl->sdl_alen = FDDI_ADDR_LEN;
765 sdl->sdl_slen = 0;
766 e_addr = LLADDR(sdl);
767 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
768 *llsa = (struct sockaddr *)sdl;
769 return (0);
770 #endif
771
772 default:
773 /*
774 * Well, the text isn't quite right, but it's the name
775 * that counts...
776 */
777 return (EAFNOSUPPORT);
778 }
779
780 return (0);
781 }
782
783 static moduledata_t fddi_mod = {
784 "fddi", /* module name */
785 NULL, /* event handler */
786 0 /* extra data */
787 };
788
789 DECLARE_MODULE(fddi, fddi_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
790 MODULE_VERSION(fddi, 1);
791
|