1 /*
2 * Copyright (c) 1998, Larry Lile
3 * All rights reserved.
4 *
5 * For latest sources and information on this driver, please
6 * go to http://anarchy.stdio.com.
7 *
8 * Questions, comments or suggestions should be directed to
9 * Larry Lile <lile@stdio.com>.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice unmodified, this list of conditions, and the following
16 * disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * $FreeBSD: releng/5.3/sys/net/if_iso88025subr.c 136588 2004-10-16 08:43:07Z cvs2svn $
34 *
35 */
36
37 /*
38 *
39 * General ISO 802.5 (Token Ring) support routines
40 *
41 */
42
43 #include "opt_inet.h"
44 #include "opt_inet6.h"
45 #include "opt_ipx.h"
46 #include "opt_mac.h"
47
48 #include <sys/param.h>
49 #include <sys/systm.h>
50 #include <sys/kernel.h>
51 #include <sys/mac.h>
52 #include <sys/malloc.h>
53 #include <sys/mbuf.h>
54 #include <sys/module.h>
55 #include <sys/socket.h>
56 #include <sys/sockio.h>
57
58 #include <net/if.h>
59 #include <net/if_dl.h>
60 #include <net/if_llc.h>
61 #include <net/if_types.h>
62
63 #include <net/netisr.h>
64 #include <net/route.h>
65 #include <net/bpf.h>
66 #include <net/iso88025.h>
67
68 #if defined(INET) || defined(INET6)
69 #include <netinet/in.h>
70 #include <netinet/in_var.h>
71 #include <netinet/if_ether.h>
72 #endif
73 #ifdef INET6
74 #include <netinet6/nd6.h>
75 #endif
76
77 #ifdef IPX
78 #include <netipx/ipx.h>
79 #include <netipx/ipx_if.h>
80 #endif
81
82 static const u_char iso88025_broadcastaddr[ISO88025_ADDR_LEN] =
83 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
84
85 static int iso88025_resolvemulti (struct ifnet *, struct sockaddr **,
86 struct sockaddr *);
87
88 #define senderr(e) do { error = (e); goto bad; } while (0)
89
90 /*
91 * Perform common duties while attaching to interface list
92 */
93 void
94 iso88025_ifattach(struct ifnet *ifp, int bpf)
95 {
96 struct ifaddr *ifa;
97 struct sockaddr_dl *sdl;
98
99 ifa = NULL;
100
101 ifp->if_type = IFT_ISO88025;
102 ifp->if_addrlen = ISO88025_ADDR_LEN;
103 ifp->if_hdrlen = ISO88025_HDR_LEN;
104
105 if_attach(ifp); /* Must be called before additional assignments */
106
107 ifp->if_output = iso88025_output;
108 ifp->if_input = iso88025_input;
109 ifp->if_resolvemulti = iso88025_resolvemulti;
110 ifp->if_broadcastaddr = iso88025_broadcastaddr;
111
112 if (ifp->if_baudrate == 0)
113 ifp->if_baudrate = TR_16MBPS; /* 16Mbit should be a safe default */
114 if (ifp->if_mtu == 0)
115 ifp->if_mtu = ISO88025_DEFAULT_MTU;
116
117 ifa = ifaddr_byindex(ifp->if_index);
118 if (ifa == 0) {
119 if_printf(ifp, "%s() no lladdr!\n", __func__);
120 return;
121 }
122
123 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
124 sdl->sdl_type = IFT_ISO88025;
125 sdl->sdl_alen = ifp->if_addrlen;
126 bcopy(IFP2AC(ifp)->ac_enaddr, LLADDR(sdl), ifp->if_addrlen);
127
128 if (bpf)
129 bpfattach(ifp, DLT_IEEE802, ISO88025_HDR_LEN);
130
131 return;
132 }
133
134 /*
135 * Perform common duties while detaching a Token Ring interface
136 */
137 void
138 iso88025_ifdetach(ifp, bpf)
139 struct ifnet *ifp;
140 int bpf;
141 {
142
143 if (bpf)
144 bpfdetach(ifp);
145
146 if_detach(ifp);
147
148 return;
149 }
150
151 int
152 iso88025_ioctl(struct ifnet *ifp, int command, caddr_t data)
153 {
154 struct ifaddr *ifa;
155 struct ifreq *ifr;
156 int error;
157
158 ifa = (struct ifaddr *) data;
159 ifr = (struct ifreq *) data;
160 error = 0;
161
162 switch (command) {
163 case SIOCSIFADDR:
164 ifp->if_flags |= IFF_UP;
165
166 switch (ifa->ifa_addr->sa_family) {
167 #ifdef INET
168 case AF_INET:
169 ifp->if_init(ifp->if_softc); /* before arpwhohas */
170 arp_ifinit(ifp, ifa);
171 break;
172 #endif /* INET */
173 #ifdef IPX
174 /*
175 * XXX - This code is probably wrong
176 */
177 case AF_IPX: {
178 struct ipx_addr *ina;
179 struct arpcom *ac;
180
181 ina = &(IA_SIPX(ifa)->sipx_addr);
182 ac = IFP2AC(ifp);
183
184 if (ipx_nullhost(*ina))
185 ina->x_host = *(union ipx_host *)
186 ac->ac_enaddr;
187 else
188 bcopy((caddr_t) ina->x_host.c_host,
189 (caddr_t) ac->ac_enaddr,
190 ISO88025_ADDR_LEN);
191
192 /*
193 * Set new address
194 */
195 ifp->if_init(ifp->if_softc);
196 }
197 break;
198 #endif /* IPX */
199 default:
200 ifp->if_init(ifp->if_softc);
201 break;
202 }
203 break;
204
205 case SIOCGIFADDR: {
206 struct sockaddr *sa;
207
208 sa = (struct sockaddr *) & ifr->ifr_data;
209 bcopy(IFP2AC(ifp)->ac_enaddr,
210 (caddr_t) sa->sa_data, ISO88025_ADDR_LEN);
211 }
212 break;
213
214 case SIOCSIFMTU:
215 /*
216 * Set the interface MTU.
217 */
218 if (ifr->ifr_mtu > ISO88025_MAX_MTU) {
219 error = EINVAL;
220 } else {
221 ifp->if_mtu = ifr->ifr_mtu;
222 }
223 break;
224 default:
225 error = EINVAL; /* XXX netbsd has ENOTTY??? */
226 break;
227 }
228
229 return (error);
230 }
231
232 /*
233 * ISO88025 encapsulation
234 */
235 int
236 iso88025_output(ifp, m, dst, rt0)
237 struct ifnet *ifp;
238 struct mbuf *m;
239 struct sockaddr *dst;
240 struct rtentry *rt0;
241 {
242 u_int16_t snap_type = 0;
243 int loop_copy = 0, error = 0, rif_len = 0;
244 u_char edst[ISO88025_ADDR_LEN];
245 struct iso88025_header *th;
246 struct iso88025_header gen_th;
247 struct sockaddr_dl *sdl = NULL;
248 struct rtentry *rt;
249
250 #ifdef MAC
251 error = mac_check_ifnet_transmit(ifp, m);
252 if (error)
253 senderr(error);
254 #endif
255
256 if (ifp->if_flags & IFF_MONITOR)
257 senderr(ENETDOWN);
258 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
259 senderr(ENETDOWN);
260 getmicrotime(&ifp->if_lastchange);
261
262 /* Calculate routing info length based on arp table entry */
263 /* XXX any better way to do this ? */
264 error = rt_check(&rt, &rt0, dst);
265 if (error)
266 goto bad;
267
268 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway))
269 if (SDL_ISO88025(sdl)->trld_rcf != 0)
270 rif_len = TR_RCF_RIFLEN(SDL_ISO88025(sdl)->trld_rcf);
271
272 /* Generate a generic 802.5 header for the packet */
273 gen_th.ac = TR_AC;
274 gen_th.fc = TR_LLC_FRAME;
275 (void)memcpy((caddr_t)gen_th.iso88025_shost, IFP2AC(ifp)->ac_enaddr,
276 ISO88025_ADDR_LEN);
277 if (rif_len) {
278 gen_th.iso88025_shost[0] |= TR_RII;
279 if (rif_len > 2) {
280 gen_th.rcf = SDL_ISO88025(sdl)->trld_rcf;
281 (void)memcpy((caddr_t)gen_th.rd,
282 (caddr_t)SDL_ISO88025(sdl)->trld_route,
283 rif_len - 2);
284 }
285 }
286
287 switch (dst->sa_family) {
288 #ifdef INET
289 case AF_INET:
290 error = arpresolve(ifp, rt0, m, dst, edst);
291 if (error)
292 return (error == EWOULDBLOCK ? 0 : error);
293 snap_type = ETHERTYPE_IP;
294 break;
295 case AF_ARP:
296 {
297 struct arphdr *ah;
298 ah = mtod(m, struct arphdr *);
299 ah->ar_hrd = htons(ARPHRD_IEEE802);
300
301 loop_copy = -1; /* if this is for us, don't do it */
302
303 switch(ntohs(ah->ar_op)) {
304 case ARPOP_REVREQUEST:
305 case ARPOP_REVREPLY:
306 snap_type = ETHERTYPE_REVARP;
307 break;
308 case ARPOP_REQUEST:
309 case ARPOP_REPLY:
310 default:
311 snap_type = ETHERTYPE_ARP;
312 break;
313 }
314
315 if (m->m_flags & M_BCAST)
316 bcopy(ifp->if_broadcastaddr, edst, ISO88025_ADDR_LEN);
317 else
318 bcopy(ar_tha(ah), edst, ISO88025_ADDR_LEN);
319
320 }
321 break;
322 #endif /* INET */
323 #ifdef INET6
324 case AF_INET6:
325 error = nd6_storelladdr(ifp, rt0, m, dst, (u_char *)edst);
326 if (error)
327 return (error);
328 snap_type = ETHERTYPE_IPV6;
329 break;
330 #endif /* INET6 */
331 #ifdef IPX
332 case AF_IPX:
333 {
334 u_int8_t *cp;
335
336 bcopy((caddr_t)&(satoipx_addr(dst).x_host), (caddr_t)edst,
337 ISO88025_ADDR_LEN);
338
339 M_PREPEND(m, 3, M_TRYWAIT);
340 if (m == 0)
341 senderr(ENOBUFS);
342 m = m_pullup(m, 3);
343 if (m == 0)
344 senderr(ENOBUFS);
345 cp = mtod(m, u_int8_t *);
346 *cp++ = ETHERTYPE_IPX_8022;
347 *cp++ = ETHERTYPE_IPX_8022;
348 *cp++ = LLC_UI;
349 }
350 break;
351 #endif /* IPX */
352 case AF_UNSPEC:
353 {
354 struct iso88025_sockaddr_data *sd;
355 /*
356 * For AF_UNSPEC sockaddr.sa_data must contain all of the
357 * mac information needed to send the packet. This allows
358 * full mac, llc, and source routing function to be controlled.
359 * llc and source routing information must already be in the
360 * mbuf provided, ac/fc are set in sa_data. sockaddr.sa_data
361 * should be an iso88025_sockaddr_data structure see iso88025.h
362 */
363 loop_copy = -1;
364 sd = (struct iso88025_sockaddr_data *)dst->sa_data;
365 gen_th.ac = sd->ac;
366 gen_th.fc = sd->fc;
367 (void)memcpy((caddr_t)edst, (caddr_t)sd->ether_dhost,
368 ISO88025_ADDR_LEN);
369 (void)memcpy((caddr_t)gen_th.iso88025_shost,
370 (caddr_t)sd->ether_shost, ISO88025_ADDR_LEN);
371 rif_len = 0;
372 break;
373 }
374 default:
375 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
376 senderr(EAFNOSUPPORT);
377 break;
378 }
379
380 /*
381 * Add LLC header.
382 */
383 if (snap_type != 0) {
384 struct llc *l;
385 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
386 if (m == 0)
387 senderr(ENOBUFS);
388 l = mtod(m, struct llc *);
389 l->llc_control = LLC_UI;
390 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
391 l->llc_snap.org_code[0] =
392 l->llc_snap.org_code[1] =
393 l->llc_snap.org_code[2] = 0;
394 l->llc_snap.ether_type = htons(snap_type);
395 }
396
397 /*
398 * Add local net header. If no space in first mbuf,
399 * allocate another.
400 */
401 M_PREPEND(m, ISO88025_HDR_LEN + rif_len, M_DONTWAIT);
402 if (m == 0)
403 senderr(ENOBUFS);
404 th = mtod(m, struct iso88025_header *);
405 bcopy((caddr_t)edst, (caddr_t)&gen_th.iso88025_dhost, ISO88025_ADDR_LEN);
406
407 /* Copy as much of the generic header as is needed into the mbuf */
408 memcpy(th, &gen_th, ISO88025_HDR_LEN + rif_len);
409
410 /*
411 * If a simplex interface, and the packet is being sent to our
412 * Ethernet address or a broadcast address, loopback a copy.
413 * XXX To make a simplex device behave exactly like a duplex
414 * device, we should copy in the case of sending to our own
415 * ethernet address (thus letting the original actually appear
416 * on the wire). However, we don't do that here for security
417 * reasons and compatibility with the original behavior.
418 */
419 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
420 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
421 struct mbuf *n;
422 n = m_copy(m, 0, (int)M_COPYALL);
423 (void) if_simloop(ifp, n, dst->sa_family,
424 ISO88025_HDR_LEN);
425 } else if (bcmp(th->iso88025_dhost, th->iso88025_shost,
426 ETHER_ADDR_LEN) == 0) {
427 (void) if_simloop(ifp, m, dst->sa_family,
428 ISO88025_HDR_LEN);
429 return(0); /* XXX */
430 }
431 }
432
433 IFQ_HANDOFF_ADJ(ifp, m, ISO88025_HDR_LEN + LLC_SNAPFRAMELEN, error);
434 if (error) {
435 printf("iso88025_output: packet dropped QFULL.\n");
436 ifp->if_oerrors++;
437 }
438 return (error);
439
440 bad:
441 ifp->if_oerrors++;
442 if (m)
443 m_freem(m);
444 return (error);
445 }
446
447 /*
448 * ISO 88025 de-encapsulation
449 */
450 void
451 iso88025_input(ifp, m)
452 struct ifnet *ifp;
453 struct mbuf *m;
454 {
455 struct iso88025_header *th;
456 struct llc *l;
457 int isr;
458 int mac_hdr_len;
459
460 /*
461 * Do consistency checks to verify assumptions
462 * made by code past this point.
463 */
464 if ((m->m_flags & M_PKTHDR) == 0) {
465 if_printf(ifp, "discard frame w/o packet header\n");
466 ifp->if_ierrors++;
467 m_freem(m);
468 return;
469 }
470 if (m->m_pkthdr.rcvif == NULL) {
471 if_printf(ifp, "discard frame w/o interface pointer\n");
472 ifp->if_ierrors++;
473 m_freem(m);
474 return;
475 }
476
477 m = m_pullup(m, ISO88025_HDR_LEN);
478 if (m == NULL) {
479 ifp->if_ierrors++;
480 goto dropanyway;
481 }
482 th = mtod(m, struct iso88025_header *);
483 m->m_pkthdr.header = (void *)th;
484
485 /*
486 * Discard packet if interface is not up.
487 */
488 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
489 goto dropanyway;
490
491 /*
492 * Give bpf a chance at the packet.
493 */
494 BPF_MTAP(ifp, m);
495
496 /*
497 * Interface marked for monitoring; discard packet.
498 */
499 if (ifp->if_flags & IFF_MONITOR) {
500 m_freem(m);
501 return;
502 }
503
504 #ifdef MAC
505 mac_create_mbuf_from_ifnet(ifp, m);
506 #endif
507
508 /*
509 * Update interface statistics.
510 */
511 ifp->if_ibytes += m->m_pkthdr.len;
512 getmicrotime(&ifp->if_lastchange);
513
514 /*
515 * Discard non local unicast packets when interface
516 * is in promiscuous mode.
517 */
518 if ((ifp->if_flags & IFF_PROMISC) &&
519 ((th->iso88025_dhost[0] & 1) == 0) &&
520 (bcmp(IFP2AC(ifp)->ac_enaddr, (caddr_t) th->iso88025_dhost,
521 ISO88025_ADDR_LEN) != 0))
522 goto dropanyway;
523
524 /*
525 * Set mbuf flags for bcast/mcast.
526 */
527 if (th->iso88025_dhost[0] & 1) {
528 if (bcmp(iso88025_broadcastaddr, th->iso88025_dhost,
529 ISO88025_ADDR_LEN) == 0)
530 m->m_flags |= M_BCAST;
531 else
532 m->m_flags |= M_MCAST;
533 ifp->if_imcasts++;
534 }
535
536 mac_hdr_len = ISO88025_HDR_LEN;
537 /* Check for source routing info */
538 if (th->iso88025_shost[0] & TR_RII)
539 mac_hdr_len += TR_RCF_RIFLEN(th->rcf);
540
541 /* Strip off ISO88025 header. */
542 m_adj(m, mac_hdr_len);
543
544 m = m_pullup(m, LLC_SNAPFRAMELEN);
545 if (m == 0) {
546 ifp->if_ierrors++;
547 goto dropanyway;
548 }
549 l = mtod(m, struct llc *);
550
551 switch (l->llc_dsap) {
552 #ifdef IPX
553 case ETHERTYPE_IPX_8022: /* Thanks a bunch Novell */
554 if ((l->llc_control != LLC_UI) ||
555 (l->llc_ssap != ETHERTYPE_IPX_8022)) {
556 ifp->if_noproto++;
557 goto dropanyway;
558 }
559
560 th->iso88025_shost[0] &= ~(TR_RII);
561 m_adj(m, 3);
562 isr = NETISR_IPX;
563 break;
564 #endif /* IPX */
565 case LLC_SNAP_LSAP: {
566 u_int16_t type;
567 if ((l->llc_control != LLC_UI) ||
568 (l->llc_ssap != LLC_SNAP_LSAP)) {
569 ifp->if_noproto++;
570 goto dropanyway;
571 }
572
573 if (l->llc_snap.org_code[0] != 0 ||
574 l->llc_snap.org_code[1] != 0 ||
575 l->llc_snap.org_code[2] != 0) {
576 ifp->if_noproto++;
577 goto dropanyway;
578 }
579
580 type = ntohs(l->llc_snap.ether_type);
581 m_adj(m, LLC_SNAPFRAMELEN);
582 switch (type) {
583 #ifdef INET
584 case ETHERTYPE_IP:
585 th->iso88025_shost[0] &= ~(TR_RII);
586 if (ip_fastforward(m))
587 return;
588 isr = NETISR_IP;
589 break;
590
591 case ETHERTYPE_ARP:
592 if (ifp->if_flags & IFF_NOARP)
593 goto dropanyway;
594 isr = NETISR_ARP;
595 break;
596 #endif /* INET */
597 #ifdef IPX_SNAP /* XXX: Not supported! */
598 case ETHERTYPE_IPX:
599 th->iso88025_shost[0] &= ~(TR_RII);
600 isr = NETISR_IPX;
601 break;
602 #endif /* IPX_SNAP */
603 #ifdef INET6
604 case ETHERTYPE_IPV6:
605 th->iso88025_shost[0] &= ~(TR_RII);
606 isr = NETISR_IPV6;
607 break;
608 #endif /* INET6 */
609 default:
610 printf("iso88025_input: unexpected llc_snap ether_type 0x%02x\n", type);
611 ifp->if_noproto++;
612 goto dropanyway;
613 }
614 break;
615 }
616 #ifdef ISO
617 case LLC_ISO_LSAP:
618 switch (l->llc_control) {
619 case LLC_UI:
620 ifp->if_noproto++;
621 goto dropanyway;
622 break;
623 case LLC_XID:
624 case LLC_XID_P:
625 if(m->m_len < ISO88025_ADDR_LEN)
626 goto dropanyway;
627 l->llc_window = 0;
628 l->llc_fid = 9;
629 l->llc_class = 1;
630 l->llc_dsap = l->llc_ssap = 0;
631 /* Fall through to */
632 case LLC_TEST:
633 case LLC_TEST_P:
634 {
635 struct sockaddr sa;
636 struct arpcom *ac;
637 struct iso88025_sockaddr_data *th2;
638 int i;
639 u_char c;
640
641 ac = IFP2AC(ifp);
642 c = l->llc_dsap;
643
644 if (th->iso88025_shost[0] & TR_RII) { /* XXX */
645 printf("iso88025_input: dropping source routed LLC_TEST\n");
646 goto dropanyway;
647 }
648 l->llc_dsap = l->llc_ssap;
649 l->llc_ssap = c;
650 if (m->m_flags & (M_BCAST | M_MCAST))
651 bcopy((caddr_t)ac->ac_enaddr,
652 (caddr_t)th->iso88025_dhost,
653 ISO88025_ADDR_LEN);
654 sa.sa_family = AF_UNSPEC;
655 sa.sa_len = sizeof(sa);
656 th2 = (struct iso88025_sockaddr_data *)sa.sa_data;
657 for (i = 0; i < ISO88025_ADDR_LEN; i++) {
658 th2->ether_shost[i] = c = th->iso88025_dhost[i];
659 th2->ether_dhost[i] = th->iso88025_dhost[i] =
660 th->iso88025_shost[i];
661 th->iso88025_shost[i] = c;
662 }
663 th2->ac = TR_AC;
664 th2->fc = TR_LLC_FRAME;
665 ifp->if_output(ifp, m, &sa, NULL);
666 return;
667 }
668 default:
669 printf("iso88025_input: unexpected llc control 0x%02x\n", l->llc_control);
670 ifp->if_noproto++;
671 goto dropanyway;
672 break;
673 }
674 break;
675 #endif /* ISO */
676 default:
677 printf("iso88025_input: unknown dsap 0x%x\n", l->llc_dsap);
678 ifp->if_noproto++;
679 goto dropanyway;
680 break;
681 }
682
683 netisr_dispatch(isr, m);
684 return;
685
686 dropanyway:
687 ifp->if_iqdrops++;
688 if (m)
689 m_freem(m);
690 return;
691 }
692
693 static int
694 iso88025_resolvemulti (ifp, llsa, sa)
695 struct ifnet *ifp;
696 struct sockaddr **llsa;
697 struct sockaddr *sa;
698 {
699 struct sockaddr_dl *sdl;
700 struct sockaddr_in *sin;
701 #ifdef INET6
702 struct sockaddr_in6 *sin6;
703 #endif
704 u_char *e_addr;
705
706 switch(sa->sa_family) {
707 case AF_LINK:
708 /*
709 * No mapping needed. Just check that it's a valid MC address.
710 */
711 sdl = (struct sockaddr_dl *)sa;
712 e_addr = LLADDR(sdl);
713 if ((e_addr[0] & 1) != 1) {
714 return (EADDRNOTAVAIL);
715 }
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 }
725 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
726 M_WAITOK|M_ZERO);
727 sdl->sdl_len = sizeof *sdl;
728 sdl->sdl_family = AF_LINK;
729 sdl->sdl_index = ifp->if_index;
730 sdl->sdl_type = IFT_ISO88025;
731 sdl->sdl_alen = ISO88025_ADDR_LEN;
732 e_addr = LLADDR(sdl);
733 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
734 *llsa = (struct sockaddr *)sdl;
735 return (0);
736 #endif
737 #ifdef INET6
738 case AF_INET6:
739 sin6 = (struct sockaddr_in6 *)sa;
740 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
741 /*
742 * An IP6 address of 0 means listen to all
743 * of the Ethernet multicast address used for IP6.
744 * (This is used for multicast routers.)
745 */
746 ifp->if_flags |= IFF_ALLMULTI;
747 *llsa = 0;
748 return (0);
749 }
750 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
751 return (EADDRNOTAVAIL);
752 }
753 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
754 M_WAITOK|M_ZERO);
755 sdl->sdl_len = sizeof *sdl;
756 sdl->sdl_family = AF_LINK;
757 sdl->sdl_index = ifp->if_index;
758 sdl->sdl_type = IFT_ISO88025;
759 sdl->sdl_alen = ISO88025_ADDR_LEN;
760 e_addr = LLADDR(sdl);
761 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
762 *llsa = (struct sockaddr *)sdl;
763 return (0);
764 #endif
765
766 default:
767 /*
768 * Well, the text isn't quite right, but it's the name
769 * that counts...
770 */
771 return (EAFNOSUPPORT);
772 }
773
774 return (0);
775 }
776
777 static moduledata_t iso88025_mod = {
778 "iso88025",
779 NULL,
780 0
781 };
782
783 DECLARE_MODULE(iso88025, iso88025_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
784 MODULE_VERSION(iso88025, 1);
Cache object: 3b6046c0aac040e6d2c6c35c934ac516
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