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/8.4/sys/net/if_iso88025subr.c 231380 2012-02-10 13:15:11Z bz $
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
47 #include <sys/param.h>
48 #include <sys/systm.h>
49 #include <sys/kernel.h>
50 #include <sys/malloc.h>
51 #include <sys/mbuf.h>
52 #include <sys/module.h>
53 #include <sys/socket.h>
54 #include <sys/sockio.h>
55
56 #include <net/if.h>
57 #include <net/if_arp.h>
58 #include <net/if_dl.h>
59 #include <net/if_llc.h>
60 #include <net/if_types.h>
61 #include <net/if_llatbl.h>
62
63 #include <net/ethernet.h>
64 #include <net/netisr.h>
65 #include <net/route.h>
66 #include <net/bpf.h>
67 #include <net/iso88025.h>
68
69 #if defined(INET) || defined(INET6)
70 #include <netinet/in.h>
71 #include <netinet/in_var.h>
72 #include <netinet/if_ether.h>
73 #endif
74 #ifdef INET6
75 #include <netinet6/nd6.h>
76 #endif
77
78 #ifdef IPX
79 #include <netipx/ipx.h>
80 #include <netipx/ipx_if.h>
81 #endif
82
83 #include <security/mac/mac_framework.h>
84
85 static const u_char iso88025_broadcastaddr[ISO88025_ADDR_LEN] =
86 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
87
88 static int iso88025_resolvemulti (struct ifnet *, struct sockaddr **,
89 struct sockaddr *);
90
91 #define senderr(e) do { error = (e); goto bad; } while (0)
92
93 /*
94 * Perform common duties while attaching to interface list
95 */
96 void
97 iso88025_ifattach(struct ifnet *ifp, const u_int8_t *lla, int bpf)
98 {
99 struct ifaddr *ifa;
100 struct sockaddr_dl *sdl;
101
102 ifa = NULL;
103
104 ifp->if_type = IFT_ISO88025;
105 ifp->if_addrlen = ISO88025_ADDR_LEN;
106 ifp->if_hdrlen = ISO88025_HDR_LEN;
107
108 if_attach(ifp); /* Must be called before additional assignments */
109
110 ifp->if_output = iso88025_output;
111 ifp->if_input = iso88025_input;
112 ifp->if_resolvemulti = iso88025_resolvemulti;
113 ifp->if_broadcastaddr = iso88025_broadcastaddr;
114
115 if (ifp->if_baudrate == 0)
116 ifp->if_baudrate = TR_16MBPS; /* 16Mbit should be a safe default */
117 if (ifp->if_mtu == 0)
118 ifp->if_mtu = ISO88025_DEFAULT_MTU;
119
120 ifa = ifp->if_addr;
121 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
122
123 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
124 sdl->sdl_type = IFT_ISO88025;
125 sdl->sdl_alen = ifp->if_addrlen;
126 bcopy(lla, 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, u_long 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
180 ina = &(IA_SIPX(ifa)->sipx_addr);
181
182 if (ipx_nullhost(*ina))
183 ina->x_host = *(union ipx_host *)
184 IF_LLADDR(ifp);
185 else
186 bcopy((caddr_t) ina->x_host.c_host,
187 (caddr_t) IF_LLADDR(ifp),
188 ISO88025_ADDR_LEN);
189
190 /*
191 * Set new address
192 */
193 ifp->if_init(ifp->if_softc);
194 }
195 break;
196 #endif /* IPX */
197 default:
198 ifp->if_init(ifp->if_softc);
199 break;
200 }
201 break;
202
203 case SIOCGIFADDR: {
204 struct sockaddr *sa;
205
206 sa = (struct sockaddr *) & ifr->ifr_data;
207 bcopy(IF_LLADDR(ifp),
208 (caddr_t) sa->sa_data, ISO88025_ADDR_LEN);
209 }
210 break;
211
212 case SIOCSIFMTU:
213 /*
214 * Set the interface MTU.
215 */
216 if (ifr->ifr_mtu > ISO88025_MAX_MTU) {
217 error = EINVAL;
218 } else {
219 ifp->if_mtu = ifr->ifr_mtu;
220 }
221 break;
222 default:
223 error = EINVAL; /* XXX netbsd has ENOTTY??? */
224 break;
225 }
226
227 return (error);
228 }
229
230 /*
231 * ISO88025 encapsulation
232 */
233 int
234 iso88025_output(ifp, m, dst, ro)
235 struct ifnet *ifp;
236 struct mbuf *m;
237 struct sockaddr *dst;
238 struct route *ro;
239 {
240 u_int16_t snap_type = 0;
241 int loop_copy = 0, error = 0, rif_len = 0;
242 u_char edst[ISO88025_ADDR_LEN];
243 struct iso88025_header *th;
244 struct iso88025_header gen_th;
245 struct sockaddr_dl *sdl = NULL;
246 struct rtentry *rt0 = NULL;
247 #if defined(INET) || defined(INET6)
248 struct llentry *lle;
249 #endif
250
251 if (ro != NULL)
252 rt0 = ro->ro_rt;
253
254 #ifdef MAC
255 error = mac_ifnet_check_transmit(ifp, m);
256 if (error)
257 senderr(error);
258 #endif
259
260 if (ifp->if_flags & IFF_MONITOR)
261 senderr(ENETDOWN);
262 if (!((ifp->if_flags & IFF_UP) &&
263 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
264 senderr(ENETDOWN);
265 getmicrotime(&ifp->if_lastchange);
266
267 /* Calculate routing info length based on arp table entry */
268 /* XXX any better way to do this ? */
269
270 if (rt0 && (sdl = (struct sockaddr_dl *)rt0->rt_gateway))
271 if (SDL_ISO88025(sdl)->trld_rcf != 0)
272 rif_len = TR_RCF_RIFLEN(SDL_ISO88025(sdl)->trld_rcf);
273
274 /* Generate a generic 802.5 header for the packet */
275 gen_th.ac = TR_AC;
276 gen_th.fc = TR_LLC_FRAME;
277 (void)memcpy((caddr_t)gen_th.iso88025_shost, IF_LLADDR(ifp),
278 ISO88025_ADDR_LEN);
279 if (rif_len) {
280 gen_th.iso88025_shost[0] |= TR_RII;
281 if (rif_len > 2) {
282 gen_th.rcf = SDL_ISO88025(sdl)->trld_rcf;
283 (void)memcpy((caddr_t)gen_th.rd,
284 (caddr_t)SDL_ISO88025(sdl)->trld_route,
285 rif_len - 2);
286 }
287 }
288
289 switch (dst->sa_family) {
290 #ifdef INET
291 case AF_INET:
292 error = arpresolve(ifp, rt0, m, dst, edst, &lle);
293 if (error)
294 return (error == EWOULDBLOCK ? 0 : error);
295 snap_type = ETHERTYPE_IP;
296 break;
297 case AF_ARP:
298 {
299 struct arphdr *ah;
300 ah = mtod(m, struct arphdr *);
301 ah->ar_hrd = htons(ARPHRD_IEEE802);
302
303 loop_copy = -1; /* if this is for us, don't do it */
304
305 switch(ntohs(ah->ar_op)) {
306 case ARPOP_REVREQUEST:
307 case ARPOP_REVREPLY:
308 snap_type = ETHERTYPE_REVARP;
309 break;
310 case ARPOP_REQUEST:
311 case ARPOP_REPLY:
312 default:
313 snap_type = ETHERTYPE_ARP;
314 break;
315 }
316
317 if (m->m_flags & M_BCAST)
318 bcopy(ifp->if_broadcastaddr, edst, ISO88025_ADDR_LEN);
319 else
320 bcopy(ar_tha(ah), edst, ISO88025_ADDR_LEN);
321
322 }
323 break;
324 #endif /* INET */
325 #ifdef INET6
326 case AF_INET6:
327 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
328 if (error)
329 return (error);
330 snap_type = ETHERTYPE_IPV6;
331 break;
332 #endif /* INET6 */
333 #ifdef IPX
334 case AF_IPX:
335 {
336 u_int8_t *cp;
337
338 bcopy((caddr_t)&(satoipx_addr(dst).x_host), (caddr_t)edst,
339 ISO88025_ADDR_LEN);
340
341 M_PREPEND(m, 3, M_WAIT);
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) &&
489 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
490 goto dropanyway;
491
492 /*
493 * Give bpf a chance at the packet.
494 */
495 BPF_MTAP(ifp, m);
496
497 /*
498 * Interface marked for monitoring; discard packet.
499 */
500 if (ifp->if_flags & IFF_MONITOR) {
501 m_freem(m);
502 return;
503 }
504
505 #ifdef MAC
506 mac_ifnet_create_mbuf(ifp, m);
507 #endif
508
509 /*
510 * Update interface statistics.
511 */
512 ifp->if_ibytes += m->m_pkthdr.len;
513 getmicrotime(&ifp->if_lastchange);
514
515 /*
516 * Discard non local unicast packets when interface
517 * is in promiscuous mode.
518 */
519 if ((ifp->if_flags & IFF_PROMISC) &&
520 ((th->iso88025_dhost[0] & 1) == 0) &&
521 (bcmp(IF_LLADDR(ifp), (caddr_t) th->iso88025_dhost,
522 ISO88025_ADDR_LEN) != 0))
523 goto dropanyway;
524
525 /*
526 * Set mbuf flags for bcast/mcast.
527 */
528 if (th->iso88025_dhost[0] & 1) {
529 if (bcmp(iso88025_broadcastaddr, th->iso88025_dhost,
530 ISO88025_ADDR_LEN) == 0)
531 m->m_flags |= M_BCAST;
532 else
533 m->m_flags |= M_MCAST;
534 ifp->if_imcasts++;
535 }
536
537 mac_hdr_len = ISO88025_HDR_LEN;
538 /* Check for source routing info */
539 if (th->iso88025_shost[0] & TR_RII)
540 mac_hdr_len += TR_RCF_RIFLEN(th->rcf);
541
542 /* Strip off ISO88025 header. */
543 m_adj(m, mac_hdr_len);
544
545 m = m_pullup(m, LLC_SNAPFRAMELEN);
546 if (m == 0) {
547 ifp->if_ierrors++;
548 goto dropanyway;
549 }
550 l = mtod(m, struct llc *);
551
552 switch (l->llc_dsap) {
553 #ifdef IPX
554 case ETHERTYPE_IPX_8022: /* Thanks a bunch Novell */
555 if ((l->llc_control != LLC_UI) ||
556 (l->llc_ssap != ETHERTYPE_IPX_8022)) {
557 ifp->if_noproto++;
558 goto dropanyway;
559 }
560
561 th->iso88025_shost[0] &= ~(TR_RII);
562 m_adj(m, 3);
563 isr = NETISR_IPX;
564 break;
565 #endif /* IPX */
566 case LLC_SNAP_LSAP: {
567 u_int16_t type;
568 if ((l->llc_control != LLC_UI) ||
569 (l->llc_ssap != LLC_SNAP_LSAP)) {
570 ifp->if_noproto++;
571 goto dropanyway;
572 }
573
574 if (l->llc_snap.org_code[0] != 0 ||
575 l->llc_snap.org_code[1] != 0 ||
576 l->llc_snap.org_code[2] != 0) {
577 ifp->if_noproto++;
578 goto dropanyway;
579 }
580
581 type = ntohs(l->llc_snap.ether_type);
582 m_adj(m, LLC_SNAPFRAMELEN);
583 switch (type) {
584 #ifdef INET
585 case ETHERTYPE_IP:
586 th->iso88025_shost[0] &= ~(TR_RII);
587 if ((m = ip_fastforward(m)) == NULL)
588 return;
589 isr = NETISR_IP;
590 break;
591
592 case ETHERTYPE_ARP:
593 if (ifp->if_flags & IFF_NOARP)
594 goto dropanyway;
595 isr = NETISR_ARP;
596 break;
597 #endif /* INET */
598 #ifdef IPX_SNAP /* XXX: Not supported! */
599 case ETHERTYPE_IPX:
600 th->iso88025_shost[0] &= ~(TR_RII);
601 isr = NETISR_IPX;
602 break;
603 #endif /* IPX_SNAP */
604 #ifdef INET6
605 case ETHERTYPE_IPV6:
606 th->iso88025_shost[0] &= ~(TR_RII);
607 isr = NETISR_IPV6;
608 break;
609 #endif /* INET6 */
610 default:
611 printf("iso88025_input: unexpected llc_snap ether_type 0x%02x\n", type);
612 ifp->if_noproto++;
613 goto dropanyway;
614 }
615 break;
616 }
617 #ifdef ISO
618 case LLC_ISO_LSAP:
619 switch (l->llc_control) {
620 case LLC_UI:
621 ifp->if_noproto++;
622 goto dropanyway;
623 break;
624 case LLC_XID:
625 case LLC_XID_P:
626 if(m->m_len < ISO88025_ADDR_LEN)
627 goto dropanyway;
628 l->llc_window = 0;
629 l->llc_fid = 9;
630 l->llc_class = 1;
631 l->llc_dsap = l->llc_ssap = 0;
632 /* Fall through to */
633 case LLC_TEST:
634 case LLC_TEST_P:
635 {
636 struct sockaddr sa;
637 struct arpcom *ac;
638 struct iso88025_sockaddr_data *th2;
639 int i;
640 u_char c;
641
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)IF_LLADDR(ifp),
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 M_SETFIB(m, ifp->if_fib);
684 netisr_dispatch(isr, m);
685 return;
686
687 dropanyway:
688 ifp->if_iqdrops++;
689 if (m)
690 m_freem(m);
691 return;
692 }
693
694 static int
695 iso88025_resolvemulti (ifp, llsa, sa)
696 struct ifnet *ifp;
697 struct sockaddr **llsa;
698 struct sockaddr *sa;
699 {
700 struct sockaddr_dl *sdl;
701 #ifdef INET
702 struct sockaddr_in *sin;
703 #endif
704 #ifdef INET6
705 struct sockaddr_in6 *sin6;
706 #endif
707 u_char *e_addr;
708
709 switch(sa->sa_family) {
710 case AF_LINK:
711 /*
712 * No mapping needed. Just check that it's a valid MC address.
713 */
714 sdl = (struct sockaddr_dl *)sa;
715 e_addr = LLADDR(sdl);
716 if ((e_addr[0] & 1) != 1) {
717 return (EADDRNOTAVAIL);
718 }
719 *llsa = 0;
720 return (0);
721
722 #ifdef INET
723 case AF_INET:
724 sin = (struct sockaddr_in *)sa;
725 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
726 return (EADDRNOTAVAIL);
727 }
728 sdl = malloc(sizeof *sdl, M_IFMADDR,
729 M_NOWAIT|M_ZERO);
730 if (sdl == NULL)
731 return (ENOMEM);
732 sdl->sdl_len = sizeof *sdl;
733 sdl->sdl_family = AF_LINK;
734 sdl->sdl_index = ifp->if_index;
735 sdl->sdl_type = IFT_ISO88025;
736 sdl->sdl_alen = ISO88025_ADDR_LEN;
737 e_addr = LLADDR(sdl);
738 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
739 *llsa = (struct sockaddr *)sdl;
740 return (0);
741 #endif
742 #ifdef INET6
743 case AF_INET6:
744 sin6 = (struct sockaddr_in6 *)sa;
745 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
746 /*
747 * An IP6 address of 0 means listen to all
748 * of the Ethernet multicast address used for IP6.
749 * (This is used for multicast routers.)
750 */
751 ifp->if_flags |= IFF_ALLMULTI;
752 *llsa = 0;
753 return (0);
754 }
755 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
756 return (EADDRNOTAVAIL);
757 }
758 sdl = malloc(sizeof *sdl, M_IFMADDR,
759 M_NOWAIT|M_ZERO);
760 if (sdl == NULL)
761 return (ENOMEM);
762 sdl->sdl_len = sizeof *sdl;
763 sdl->sdl_family = AF_LINK;
764 sdl->sdl_index = ifp->if_index;
765 sdl->sdl_type = IFT_ISO88025;
766 sdl->sdl_alen = ISO88025_ADDR_LEN;
767 e_addr = LLADDR(sdl);
768 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
769 *llsa = (struct sockaddr *)sdl;
770 return (0);
771 #endif
772
773 default:
774 /*
775 * Well, the text isn't quite right, but it's the name
776 * that counts...
777 */
778 return (EAFNOSUPPORT);
779 }
780
781 return (0);
782 }
783
784 MALLOC_DEFINE(M_ISO88025, "arpcom", "802.5 interface internals");
785
786 static void*
787 iso88025_alloc(u_char type, struct ifnet *ifp)
788 {
789 struct arpcom *ac;
790
791 ac = malloc(sizeof(struct arpcom), M_ISO88025, M_WAITOK | M_ZERO);
792 ac->ac_ifp = ifp;
793
794 return (ac);
795 }
796
797 static void
798 iso88025_free(void *com, u_char type)
799 {
800
801 free(com, M_ISO88025);
802 }
803
804 static int
805 iso88025_modevent(module_t mod, int type, void *data)
806 {
807
808 switch (type) {
809 case MOD_LOAD:
810 if_register_com_alloc(IFT_ISO88025, iso88025_alloc,
811 iso88025_free);
812 break;
813 case MOD_UNLOAD:
814 if_deregister_com_alloc(IFT_ISO88025);
815 break;
816 default:
817 return EOPNOTSUPP;
818 }
819
820 return (0);
821 }
822
823 static moduledata_t iso88025_mod = {
824 "iso88025",
825 iso88025_modevent,
826 0
827 };
828
829 DECLARE_MODULE(iso88025, iso88025_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
830 MODULE_VERSION(iso88025, 1);
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