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 * $FreeBSD$
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
iso88025_ifattach(struct ifnet * ifp,const u_int8_t * lla,int bpf)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
iso88025_ifdetach(ifp,bpf)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
iso88025_ioctl(struct ifnet * ifp,u_long command,caddr_t data)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
iso88025_output(struct ifnet * ifp,struct mbuf * m,const struct sockaddr * dst,struct route * ro)234 iso88025_output(struct ifnet *ifp, struct mbuf *m, const struct sockaddr *dst,
235 struct route *ro)
236 {
237 u_int16_t snap_type = 0;
238 int loop_copy = 0, error = 0, rif_len = 0;
239 u_char edst[ISO88025_ADDR_LEN];
240 struct iso88025_header *th;
241 struct iso88025_header gen_th;
242 struct sockaddr_dl *sdl = NULL;
243 struct rtentry *rt0 = NULL;
244 #if defined(INET) || defined(INET6)
245 struct llentry *lle;
246 #endif
247
248 if (ro != NULL)
249 rt0 = ro->ro_rt;
250
251 #ifdef MAC
252 error = mac_ifnet_check_transmit(ifp, m);
253 if (error)
254 senderr(error);
255 #endif
256
257 if (ifp->if_flags & IFF_MONITOR)
258 senderr(ENETDOWN);
259 if (!((ifp->if_flags & IFF_UP) &&
260 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
261 senderr(ENETDOWN);
262 getmicrotime(&ifp->if_lastchange);
263
264 /* Calculate routing info length based on arp table entry */
265 /* XXX any better way to do this ? */
266
267 if (rt0 && (sdl = (struct sockaddr_dl *)rt0->rt_gateway))
268 if (SDL_ISO88025(sdl)->trld_rcf != 0)
269 rif_len = TR_RCF_RIFLEN(SDL_ISO88025(sdl)->trld_rcf);
270
271 /* Generate a generic 802.5 header for the packet */
272 gen_th.ac = TR_AC;
273 gen_th.fc = TR_LLC_FRAME;
274 (void)memcpy((caddr_t)gen_th.iso88025_shost, IF_LLADDR(ifp),
275 ISO88025_ADDR_LEN);
276 if (rif_len) {
277 gen_th.iso88025_shost[0] |= TR_RII;
278 if (rif_len > 2) {
279 gen_th.rcf = SDL_ISO88025(sdl)->trld_rcf;
280 (void)memcpy((caddr_t)gen_th.rd,
281 (caddr_t)SDL_ISO88025(sdl)->trld_route,
282 rif_len - 2);
283 }
284 }
285
286 switch (dst->sa_family) {
287 #ifdef INET
288 case AF_INET:
289 error = arpresolve(ifp, rt0, m, dst, edst, &lle);
290 if (error)
291 return (error == EWOULDBLOCK ? 0 : error);
292 snap_type = ETHERTYPE_IP;
293 break;
294 case AF_ARP:
295 {
296 struct arphdr *ah;
297 ah = mtod(m, struct arphdr *);
298 ah->ar_hrd = htons(ARPHRD_IEEE802);
299
300 loop_copy = -1; /* if this is for us, don't do it */
301
302 switch(ntohs(ah->ar_op)) {
303 case ARPOP_REVREQUEST:
304 case ARPOP_REVREPLY:
305 snap_type = ETHERTYPE_REVARP;
306 break;
307 case ARPOP_REQUEST:
308 case ARPOP_REPLY:
309 default:
310 snap_type = ETHERTYPE_ARP;
311 break;
312 }
313
314 if (m->m_flags & M_BCAST)
315 bcopy(ifp->if_broadcastaddr, edst, ISO88025_ADDR_LEN);
316 else
317 bcopy(ar_tha(ah), edst, ISO88025_ADDR_LEN);
318
319 }
320 break;
321 #endif /* INET */
322 #ifdef INET6
323 case AF_INET6:
324 error = nd6_storelladdr(ifp, m, dst, (u_char *)edst, &lle);
325 if (error)
326 return (error);
327 snap_type = ETHERTYPE_IPV6;
328 break;
329 #endif /* INET6 */
330 #ifdef IPX
331 case AF_IPX:
332 {
333 u_int8_t *cp;
334
335 bcopy((caddr_t)&(satoipx_addr(dst).x_host), (caddr_t)edst,
336 ISO88025_ADDR_LEN);
337
338 M_PREPEND(m, 3, M_WAITOK);
339 m = m_pullup(m, 3);
340 if (m == 0)
341 senderr(ENOBUFS);
342 cp = mtod(m, u_int8_t *);
343 *cp++ = ETHERTYPE_IPX_8022;
344 *cp++ = ETHERTYPE_IPX_8022;
345 *cp++ = LLC_UI;
346 }
347 break;
348 #endif /* IPX */
349 case AF_UNSPEC:
350 {
351 const struct iso88025_sockaddr_data *sd;
352 /*
353 * For AF_UNSPEC sockaddr.sa_data must contain all of the
354 * mac information needed to send the packet. This allows
355 * full mac, llc, and source routing function to be controlled.
356 * llc and source routing information must already be in the
357 * mbuf provided, ac/fc are set in sa_data. sockaddr.sa_data
358 * should be an iso88025_sockaddr_data structure see iso88025.h
359 */
360 loop_copy = -1;
361 sd = (const struct iso88025_sockaddr_data *)dst->sa_data;
362 gen_th.ac = sd->ac;
363 gen_th.fc = sd->fc;
364 (void)memcpy(edst, sd->ether_dhost, ISO88025_ADDR_LEN);
365 (void)memcpy(gen_th.iso88025_shost, sd->ether_shost,
366 ISO88025_ADDR_LEN);
367 rif_len = 0;
368 break;
369 }
370 default:
371 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
372 senderr(EAFNOSUPPORT);
373 break;
374 }
375
376 /*
377 * Add LLC header.
378 */
379 if (snap_type != 0) {
380 struct llc *l;
381 M_PREPEND(m, LLC_SNAPFRAMELEN, M_NOWAIT);
382 if (m == 0)
383 senderr(ENOBUFS);
384 l = mtod(m, struct llc *);
385 l->llc_control = LLC_UI;
386 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
387 l->llc_snap.org_code[0] =
388 l->llc_snap.org_code[1] =
389 l->llc_snap.org_code[2] = 0;
390 l->llc_snap.ether_type = htons(snap_type);
391 }
392
393 /*
394 * Add local net header. If no space in first mbuf,
395 * allocate another.
396 */
397 M_PREPEND(m, ISO88025_HDR_LEN + rif_len, M_NOWAIT);
398 if (m == 0)
399 senderr(ENOBUFS);
400 th = mtod(m, struct iso88025_header *);
401 bcopy((caddr_t)edst, (caddr_t)&gen_th.iso88025_dhost, ISO88025_ADDR_LEN);
402
403 /* Copy as much of the generic header as is needed into the mbuf */
404 memcpy(th, &gen_th, ISO88025_HDR_LEN + rif_len);
405
406 /*
407 * If a simplex interface, and the packet is being sent to our
408 * Ethernet address or a broadcast address, loopback a copy.
409 * XXX To make a simplex device behave exactly like a duplex
410 * device, we should copy in the case of sending to our own
411 * ethernet address (thus letting the original actually appear
412 * on the wire). However, we don't do that here for security
413 * reasons and compatibility with the original behavior.
414 */
415 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
416 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
417 struct mbuf *n;
418 n = m_copy(m, 0, (int)M_COPYALL);
419 (void) if_simloop(ifp, n, dst->sa_family,
420 ISO88025_HDR_LEN);
421 } else if (bcmp(th->iso88025_dhost, th->iso88025_shost,
422 ETHER_ADDR_LEN) == 0) {
423 (void) if_simloop(ifp, m, dst->sa_family,
424 ISO88025_HDR_LEN);
425 return(0); /* XXX */
426 }
427 }
428
429 IFQ_HANDOFF_ADJ(ifp, m, ISO88025_HDR_LEN + LLC_SNAPFRAMELEN, error);
430 if (error) {
431 printf("iso88025_output: packet dropped QFULL.\n");
432 ifp->if_oerrors++;
433 }
434 return (error);
435
436 bad:
437 ifp->if_oerrors++;
438 if (m)
439 m_freem(m);
440 return (error);
441 }
442
443 /*
444 * ISO 88025 de-encapsulation
445 */
446 void
iso88025_input(ifp,m)447 iso88025_input(ifp, m)
448 struct ifnet *ifp;
449 struct mbuf *m;
450 {
451 struct iso88025_header *th;
452 struct llc *l;
453 int isr;
454 int mac_hdr_len;
455
456 /*
457 * Do consistency checks to verify assumptions
458 * made by code past this point.
459 */
460 if ((m->m_flags & M_PKTHDR) == 0) {
461 if_printf(ifp, "discard frame w/o packet header\n");
462 ifp->if_ierrors++;
463 m_freem(m);
464 return;
465 }
466 if (m->m_pkthdr.rcvif == NULL) {
467 if_printf(ifp, "discard frame w/o interface pointer\n");
468 ifp->if_ierrors++;
469 m_freem(m);
470 return;
471 }
472
473 m = m_pullup(m, ISO88025_HDR_LEN);
474 if (m == NULL) {
475 ifp->if_ierrors++;
476 goto dropanyway;
477 }
478 th = mtod(m, struct iso88025_header *);
479
480 /*
481 * Discard packet if interface is not up.
482 */
483 if (!((ifp->if_flags & IFF_UP) &&
484 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
485 goto dropanyway;
486
487 /*
488 * Give bpf a chance at the packet.
489 */
490 BPF_MTAP(ifp, m);
491
492 /*
493 * Interface marked for monitoring; discard packet.
494 */
495 if (ifp->if_flags & IFF_MONITOR) {
496 m_freem(m);
497 return;
498 }
499
500 #ifdef MAC
501 mac_ifnet_create_mbuf(ifp, m);
502 #endif
503
504 /*
505 * Update interface statistics.
506 */
507 ifp->if_ibytes += m->m_pkthdr.len;
508 getmicrotime(&ifp->if_lastchange);
509
510 /*
511 * Discard non local unicast packets when interface
512 * is in promiscuous mode.
513 */
514 if ((ifp->if_flags & IFF_PROMISC) &&
515 ((th->iso88025_dhost[0] & 1) == 0) &&
516 (bcmp(IF_LLADDR(ifp), (caddr_t) th->iso88025_dhost,
517 ISO88025_ADDR_LEN) != 0))
518 goto dropanyway;
519
520 /*
521 * Set mbuf flags for bcast/mcast.
522 */
523 if (th->iso88025_dhost[0] & 1) {
524 if (bcmp(iso88025_broadcastaddr, th->iso88025_dhost,
525 ISO88025_ADDR_LEN) == 0)
526 m->m_flags |= M_BCAST;
527 else
528 m->m_flags |= M_MCAST;
529 ifp->if_imcasts++;
530 }
531
532 mac_hdr_len = ISO88025_HDR_LEN;
533 /* Check for source routing info */
534 if (th->iso88025_shost[0] & TR_RII)
535 mac_hdr_len += TR_RCF_RIFLEN(th->rcf);
536
537 /* Strip off ISO88025 header. */
538 m_adj(m, mac_hdr_len);
539
540 m = m_pullup(m, LLC_SNAPFRAMELEN);
541 if (m == 0) {
542 ifp->if_ierrors++;
543 goto dropanyway;
544 }
545 l = mtod(m, struct llc *);
546
547 switch (l->llc_dsap) {
548 #ifdef IPX
549 case ETHERTYPE_IPX_8022: /* Thanks a bunch Novell */
550 if ((l->llc_control != LLC_UI) ||
551 (l->llc_ssap != ETHERTYPE_IPX_8022)) {
552 ifp->if_noproto++;
553 goto dropanyway;
554 }
555
556 th->iso88025_shost[0] &= ~(TR_RII);
557 m_adj(m, 3);
558 isr = NETISR_IPX;
559 break;
560 #endif /* IPX */
561 case LLC_SNAP_LSAP: {
562 u_int16_t type;
563 if ((l->llc_control != LLC_UI) ||
564 (l->llc_ssap != LLC_SNAP_LSAP)) {
565 ifp->if_noproto++;
566 goto dropanyway;
567 }
568
569 if (l->llc_snap.org_code[0] != 0 ||
570 l->llc_snap.org_code[1] != 0 ||
571 l->llc_snap.org_code[2] != 0) {
572 ifp->if_noproto++;
573 goto dropanyway;
574 }
575
576 type = ntohs(l->llc_snap.ether_type);
577 m_adj(m, LLC_SNAPFRAMELEN);
578 switch (type) {
579 #ifdef INET
580 case ETHERTYPE_IP:
581 th->iso88025_shost[0] &= ~(TR_RII);
582 if ((m = ip_fastforward(m)) == NULL)
583 return;
584 isr = NETISR_IP;
585 break;
586
587 case ETHERTYPE_ARP:
588 if (ifp->if_flags & IFF_NOARP)
589 goto dropanyway;
590 isr = NETISR_ARP;
591 break;
592 #endif /* INET */
593 #ifdef IPX_SNAP /* XXX: Not supported! */
594 case ETHERTYPE_IPX:
595 th->iso88025_shost[0] &= ~(TR_RII);
596 isr = NETISR_IPX;
597 break;
598 #endif /* IPX_SNAP */
599 #ifdef INET6
600 case ETHERTYPE_IPV6:
601 th->iso88025_shost[0] &= ~(TR_RII);
602 isr = NETISR_IPV6;
603 break;
604 #endif /* INET6 */
605 default:
606 printf("iso88025_input: unexpected llc_snap ether_type 0x%02x\n", type);
607 ifp->if_noproto++;
608 goto dropanyway;
609 }
610 break;
611 }
612 #ifdef ISO
613 case LLC_ISO_LSAP:
614 switch (l->llc_control) {
615 case LLC_UI:
616 ifp->if_noproto++;
617 goto dropanyway;
618 break;
619 case LLC_XID:
620 case LLC_XID_P:
621 if(m->m_len < ISO88025_ADDR_LEN)
622 goto dropanyway;
623 l->llc_window = 0;
624 l->llc_fid = 9;
625 l->llc_class = 1;
626 l->llc_dsap = l->llc_ssap = 0;
627 /* Fall through to */
628 case LLC_TEST:
629 case LLC_TEST_P:
630 {
631 struct sockaddr sa;
632 struct arpcom *ac;
633 struct iso88025_sockaddr_data *th2;
634 int i;
635 u_char c;
636
637 c = l->llc_dsap;
638
639 if (th->iso88025_shost[0] & TR_RII) { /* XXX */
640 printf("iso88025_input: dropping source routed LLC_TEST\n");
641 goto dropanyway;
642 }
643 l->llc_dsap = l->llc_ssap;
644 l->llc_ssap = c;
645 if (m->m_flags & (M_BCAST | M_MCAST))
646 bcopy((caddr_t)IF_LLADDR(ifp),
647 (caddr_t)th->iso88025_dhost,
648 ISO88025_ADDR_LEN);
649 sa.sa_family = AF_UNSPEC;
650 sa.sa_len = sizeof(sa);
651 th2 = (struct iso88025_sockaddr_data *)sa.sa_data;
652 for (i = 0; i < ISO88025_ADDR_LEN; i++) {
653 th2->ether_shost[i] = c = th->iso88025_dhost[i];
654 th2->ether_dhost[i] = th->iso88025_dhost[i] =
655 th->iso88025_shost[i];
656 th->iso88025_shost[i] = c;
657 }
658 th2->ac = TR_AC;
659 th2->fc = TR_LLC_FRAME;
660 ifp->if_output(ifp, m, &sa, NULL);
661 return;
662 }
663 default:
664 printf("iso88025_input: unexpected llc control 0x%02x\n", l->llc_control);
665 ifp->if_noproto++;
666 goto dropanyway;
667 break;
668 }
669 break;
670 #endif /* ISO */
671 default:
672 printf("iso88025_input: unknown dsap 0x%x\n", l->llc_dsap);
673 ifp->if_noproto++;
674 goto dropanyway;
675 break;
676 }
677
678 M_SETFIB(m, ifp->if_fib);
679 netisr_dispatch(isr, m);
680 return;
681
682 dropanyway:
683 ifp->if_iqdrops++;
684 if (m)
685 m_freem(m);
686 return;
687 }
688
689 static int
iso88025_resolvemulti(ifp,llsa,sa)690 iso88025_resolvemulti (ifp, llsa, sa)
691 struct ifnet *ifp;
692 struct sockaddr **llsa;
693 struct sockaddr *sa;
694 {
695 struct sockaddr_dl *sdl;
696 #ifdef INET
697 struct sockaddr_in *sin;
698 #endif
699 #ifdef INET6
700 struct sockaddr_in6 *sin6;
701 #endif
702 u_char *e_addr;
703
704 switch(sa->sa_family) {
705 case AF_LINK:
706 /*
707 * No mapping needed. Just check that it's a valid MC address.
708 */
709 sdl = (struct sockaddr_dl *)sa;
710 e_addr = LLADDR(sdl);
711 if ((e_addr[0] & 1) != 1) {
712 return (EADDRNOTAVAIL);
713 }
714 *llsa = 0;
715 return (0);
716
717 #ifdef INET
718 case AF_INET:
719 sin = (struct sockaddr_in *)sa;
720 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
721 return (EADDRNOTAVAIL);
722 }
723 sdl = malloc(sizeof *sdl, M_IFMADDR,
724 M_NOWAIT|M_ZERO);
725 if (sdl == NULL)
726 return (ENOMEM);
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 sdl = malloc(sizeof *sdl, M_IFMADDR,
754 M_NOWAIT|M_ZERO);
755 if (sdl == NULL)
756 return (ENOMEM);
757 sdl->sdl_len = sizeof *sdl;
758 sdl->sdl_family = AF_LINK;
759 sdl->sdl_index = ifp->if_index;
760 sdl->sdl_type = IFT_ISO88025;
761 sdl->sdl_alen = ISO88025_ADDR_LEN;
762 e_addr = LLADDR(sdl);
763 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
764 *llsa = (struct sockaddr *)sdl;
765 return (0);
766 #endif
767
768 default:
769 /*
770 * Well, the text isn't quite right, but it's the name
771 * that counts...
772 */
773 return (EAFNOSUPPORT);
774 }
775
776 return (0);
777 }
778
779 static MALLOC_DEFINE(M_ISO88025, "arpcom", "802.5 interface internals");
780
781 static void*
iso88025_alloc(u_char type,struct ifnet * ifp)782 iso88025_alloc(u_char type, struct ifnet *ifp)
783 {
784 struct arpcom *ac;
785
786 ac = malloc(sizeof(struct arpcom), M_ISO88025, M_WAITOK | M_ZERO);
787 ac->ac_ifp = ifp;
788
789 return (ac);
790 }
791
792 static void
iso88025_free(void * com,u_char type)793 iso88025_free(void *com, u_char type)
794 {
795
796 free(com, M_ISO88025);
797 }
798
799 static int
iso88025_modevent(module_t mod,int type,void * data)800 iso88025_modevent(module_t mod, int type, void *data)
801 {
802
803 switch (type) {
804 case MOD_LOAD:
805 if_register_com_alloc(IFT_ISO88025, iso88025_alloc,
806 iso88025_free);
807 break;
808 case MOD_UNLOAD:
809 if_deregister_com_alloc(IFT_ISO88025);
810 break;
811 default:
812 return EOPNOTSUPP;
813 }
814
815 return (0);
816 }
817
818 static moduledata_t iso88025_mod = {
819 "iso88025",
820 iso88025_modevent,
821 0
822 };
823
824 DECLARE_MODULE(iso88025, iso88025_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
825 MODULE_VERSION(iso88025, 1);
826