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/7.3/sys/net/if_iso88025subr.c 184739 2008-11-06 22:11:57Z julian $
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/malloc.h>
52 #include <sys/mbuf.h>
53 #include <sys/module.h>
54 #include <sys/socket.h>
55 #include <sys/sockio.h>
56
57 #include <net/if.h>
58 #include <net/if_dl.h>
59 #include <net/if_llc.h>
60 #include <net/if_types.h>
61
62 #include <net/netisr.h>
63 #include <net/route.h>
64 #include <net/bpf.h>
65 #include <net/iso88025.h>
66
67 #if defined(INET) || defined(INET6)
68 #include <netinet/in.h>
69 #include <netinet/in_var.h>
70 #include <netinet/if_ether.h>
71 #endif
72 #ifdef INET6
73 #include <netinet6/nd6.h>
74 #endif
75
76 #ifdef IPX
77 #include <netipx/ipx.h>
78 #include <netipx/ipx_if.h>
79 #endif
80
81 #include <security/mac/mac_framework.h>
82
83 static const u_char iso88025_broadcastaddr[ISO88025_ADDR_LEN] =
84 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
85
86 static int iso88025_resolvemulti (struct ifnet *, struct sockaddr **,
87 struct sockaddr *);
88
89 #define senderr(e) do { error = (e); goto bad; } while (0)
90
91 /*
92 * Perform common duties while attaching to interface list
93 */
94 void
95 iso88025_ifattach(struct ifnet *ifp, const u_int8_t *lla, int bpf)
96 {
97 struct ifaddr *ifa;
98 struct sockaddr_dl *sdl;
99
100 ifa = NULL;
101
102 ifp->if_type = IFT_ISO88025;
103 ifp->if_addrlen = ISO88025_ADDR_LEN;
104 ifp->if_hdrlen = ISO88025_HDR_LEN;
105
106 if_attach(ifp); /* Must be called before additional assignments */
107
108 ifp->if_output = iso88025_output;
109 ifp->if_input = iso88025_input;
110 ifp->if_resolvemulti = iso88025_resolvemulti;
111 ifp->if_broadcastaddr = iso88025_broadcastaddr;
112
113 if (ifp->if_baudrate == 0)
114 ifp->if_baudrate = TR_16MBPS; /* 16Mbit should be a safe default */
115 if (ifp->if_mtu == 0)
116 ifp->if_mtu = ISO88025_DEFAULT_MTU;
117
118 ifa = ifp->if_addr;
119 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
120
121 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
122 sdl->sdl_type = IFT_ISO88025;
123 sdl->sdl_alen = ifp->if_addrlen;
124 bcopy(lla, LLADDR(sdl), ifp->if_addrlen);
125
126 if (bpf)
127 bpfattach(ifp, DLT_IEEE802, ISO88025_HDR_LEN);
128
129 return;
130 }
131
132 /*
133 * Perform common duties while detaching a Token Ring interface
134 */
135 void
136 iso88025_ifdetach(ifp, bpf)
137 struct ifnet *ifp;
138 int bpf;
139 {
140
141 if (bpf)
142 bpfdetach(ifp);
143
144 if_detach(ifp);
145
146 return;
147 }
148
149 int
150 iso88025_ioctl(struct ifnet *ifp, int command, caddr_t data)
151 {
152 struct ifaddr *ifa;
153 struct ifreq *ifr;
154 int error;
155
156 ifa = (struct ifaddr *) data;
157 ifr = (struct ifreq *) data;
158 error = 0;
159
160 switch (command) {
161 case SIOCSIFADDR:
162 ifp->if_flags |= IFF_UP;
163
164 switch (ifa->ifa_addr->sa_family) {
165 #ifdef INET
166 case AF_INET:
167 ifp->if_init(ifp->if_softc); /* before arpwhohas */
168 arp_ifinit(ifp, ifa);
169 break;
170 #endif /* INET */
171 #ifdef IPX
172 /*
173 * XXX - This code is probably wrong
174 */
175 case AF_IPX: {
176 struct ipx_addr *ina;
177
178 ina = &(IA_SIPX(ifa)->sipx_addr);
179
180 if (ipx_nullhost(*ina))
181 ina->x_host = *(union ipx_host *)
182 IF_LLADDR(ifp);
183 else
184 bcopy((caddr_t) ina->x_host.c_host,
185 (caddr_t) IF_LLADDR(ifp),
186 ISO88025_ADDR_LEN);
187
188 /*
189 * Set new address
190 */
191 ifp->if_init(ifp->if_softc);
192 }
193 break;
194 #endif /* IPX */
195 default:
196 ifp->if_init(ifp->if_softc);
197 break;
198 }
199 break;
200
201 case SIOCGIFADDR: {
202 struct sockaddr *sa;
203
204 sa = (struct sockaddr *) & ifr->ifr_data;
205 bcopy(IF_LLADDR(ifp),
206 (caddr_t) sa->sa_data, ISO88025_ADDR_LEN);
207 }
208 break;
209
210 case SIOCSIFMTU:
211 /*
212 * Set the interface MTU.
213 */
214 if (ifr->ifr_mtu > ISO88025_MAX_MTU) {
215 error = EINVAL;
216 } else {
217 ifp->if_mtu = ifr->ifr_mtu;
218 }
219 break;
220 default:
221 error = EINVAL; /* XXX netbsd has ENOTTY??? */
222 break;
223 }
224
225 return (error);
226 }
227
228 /*
229 * ISO88025 encapsulation
230 */
231 int
232 iso88025_output(ifp, m, dst, rt0)
233 struct ifnet *ifp;
234 struct mbuf *m;
235 struct sockaddr *dst;
236 struct rtentry *rt0;
237 {
238 u_int16_t snap_type = 0;
239 int loop_copy = 0, error = 0, rif_len = 0;
240 u_char edst[ISO88025_ADDR_LEN];
241 struct iso88025_header *th;
242 struct iso88025_header gen_th;
243 struct sockaddr_dl *sdl = NULL;
244 struct rtentry *rt = NULL;
245
246 #ifdef MAC
247 error = mac_check_ifnet_transmit(ifp, m);
248 if (error)
249 senderr(error);
250 #endif
251
252 if (ifp->if_flags & IFF_MONITOR)
253 senderr(ENETDOWN);
254 if (!((ifp->if_flags & IFF_UP) &&
255 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
256 senderr(ENETDOWN);
257 getmicrotime(&ifp->if_lastchange);
258
259 /* Calculate routing info length based on arp table entry */
260 /* XXX any better way to do this ? */
261 if (rt0 != NULL) {
262 error = rt_check(&rt, &rt0, dst);
263 if (error)
264 goto bad;
265 RT_UNLOCK(rt);
266 }
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, IF_LLADDR(ifp),
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) &&
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_create_mbuf_from_ifnet(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 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_NOWAIT|M_ZERO);
727 if (sdl == NULL)
728 return (ENOMEM);
729 sdl->sdl_len = sizeof *sdl;
730 sdl->sdl_family = AF_LINK;
731 sdl->sdl_index = ifp->if_index;
732 sdl->sdl_type = IFT_ISO88025;
733 sdl->sdl_alen = ISO88025_ADDR_LEN;
734 e_addr = LLADDR(sdl);
735 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
736 *llsa = (struct sockaddr *)sdl;
737 return (0);
738 #endif
739 #ifdef INET6
740 case AF_INET6:
741 sin6 = (struct sockaddr_in6 *)sa;
742 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
743 /*
744 * An IP6 address of 0 means listen to all
745 * of the Ethernet multicast address used for IP6.
746 * (This is used for multicast routers.)
747 */
748 ifp->if_flags |= IFF_ALLMULTI;
749 *llsa = 0;
750 return (0);
751 }
752 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
753 return (EADDRNOTAVAIL);
754 }
755 MALLOC(sdl, struct sockaddr_dl *, 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_ISO88025;
763 sdl->sdl_alen = ISO88025_ADDR_LEN;
764 e_addr = LLADDR(sdl);
765 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, e_addr);
766 *llsa = (struct sockaddr *)sdl;
767 return (0);
768 #endif
769
770 default:
771 /*
772 * Well, the text isn't quite right, but it's the name
773 * that counts...
774 */
775 return (EAFNOSUPPORT);
776 }
777
778 return (0);
779 }
780
781 MALLOC_DEFINE(M_ISO88025, "arpcom", "802.5 interface internals");
782
783 static void*
784 iso88025_alloc(u_char type, struct ifnet *ifp)
785 {
786 struct arpcom *ac;
787
788 ac = malloc(sizeof(struct arpcom), M_ISO88025, M_WAITOK | M_ZERO);
789 ac->ac_ifp = ifp;
790
791 return (ac);
792 }
793
794 static void
795 iso88025_free(void *com, u_char type)
796 {
797
798 free(com, M_ISO88025);
799 }
800
801 static int
802 iso88025_modevent(module_t mod, int type, void *data)
803 {
804
805 switch (type) {
806 case MOD_LOAD:
807 if_register_com_alloc(IFT_ISO88025, iso88025_alloc,
808 iso88025_free);
809 break;
810 case MOD_UNLOAD:
811 if_deregister_com_alloc(IFT_ISO88025);
812 break;
813 default:
814 return EOPNOTSUPP;
815 }
816
817 return (0);
818 }
819
820 static moduledata_t iso88025_mod = {
821 "iso88025",
822 iso88025_modevent,
823 0
824 };
825
826 DECLARE_MODULE(iso88025, iso88025_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
827 MODULE_VERSION(iso88025, 1);
Cache object: d22b52774f2d5f6347770f61f0da3b29
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