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/6.0/sys/net/if_iso88025subr.c 149443 2005-08-25 05:01:24Z rwatson $
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(IFP2ENADDR(ifp), 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
180 ina = &(IA_SIPX(ifa)->sipx_addr);
181
182 if (ipx_nullhost(*ina))
183 ina->x_host = *(union ipx_host *)
184 IFP2ENADDR(ifp);
185 else
186 bcopy((caddr_t) ina->x_host.c_host,
187 (caddr_t) IFP2ENADDR(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(IFP2ENADDR(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, rt0)
235 struct ifnet *ifp;
236 struct mbuf *m;
237 struct sockaddr *dst;
238 struct rtentry *rt0;
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 *rt = NULL;
247
248 #ifdef MAC
249 error = mac_check_ifnet_transmit(ifp, m);
250 if (error)
251 senderr(error);
252 #endif
253
254 if (ifp->if_flags & IFF_MONITOR)
255 senderr(ENETDOWN);
256 if (!((ifp->if_flags & IFF_UP) &&
257 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
258 senderr(ENETDOWN);
259 getmicrotime(&ifp->if_lastchange);
260
261 /* Calculate routing info length based on arp table entry */
262 /* XXX any better way to do this ? */
263 if (rt0 != NULL) {
264 error = rt_check(&rt, &rt0, dst);
265 if (error)
266 goto bad;
267 RT_UNLOCK(rt);
268 }
269
270 if (rt && (sdl = (struct sockaddr_dl *)rt->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, IFP2ENADDR(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);
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, rt0, m, dst, (u_char *)edst);
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_TRYWAIT);
342 if (m == 0)
343 senderr(ENOBUFS);
344 m = m_pullup(m, 3);
345 if (m == 0)
346 senderr(ENOBUFS);
347 cp = mtod(m, u_int8_t *);
348 *cp++ = ETHERTYPE_IPX_8022;
349 *cp++ = ETHERTYPE_IPX_8022;
350 *cp++ = LLC_UI;
351 }
352 break;
353 #endif /* IPX */
354 case AF_UNSPEC:
355 {
356 struct iso88025_sockaddr_data *sd;
357 /*
358 * For AF_UNSPEC sockaddr.sa_data must contain all of the
359 * mac information needed to send the packet. This allows
360 * full mac, llc, and source routing function to be controlled.
361 * llc and source routing information must already be in the
362 * mbuf provided, ac/fc are set in sa_data. sockaddr.sa_data
363 * should be an iso88025_sockaddr_data structure see iso88025.h
364 */
365 loop_copy = -1;
366 sd = (struct iso88025_sockaddr_data *)dst->sa_data;
367 gen_th.ac = sd->ac;
368 gen_th.fc = sd->fc;
369 (void)memcpy((caddr_t)edst, (caddr_t)sd->ether_dhost,
370 ISO88025_ADDR_LEN);
371 (void)memcpy((caddr_t)gen_th.iso88025_shost,
372 (caddr_t)sd->ether_shost, ISO88025_ADDR_LEN);
373 rif_len = 0;
374 break;
375 }
376 default:
377 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
378 senderr(EAFNOSUPPORT);
379 break;
380 }
381
382 /*
383 * Add LLC header.
384 */
385 if (snap_type != 0) {
386 struct llc *l;
387 M_PREPEND(m, LLC_SNAPFRAMELEN, M_DONTWAIT);
388 if (m == 0)
389 senderr(ENOBUFS);
390 l = mtod(m, struct llc *);
391 l->llc_control = LLC_UI;
392 l->llc_dsap = l->llc_ssap = LLC_SNAP_LSAP;
393 l->llc_snap.org_code[0] =
394 l->llc_snap.org_code[1] =
395 l->llc_snap.org_code[2] = 0;
396 l->llc_snap.ether_type = htons(snap_type);
397 }
398
399 /*
400 * Add local net header. If no space in first mbuf,
401 * allocate another.
402 */
403 M_PREPEND(m, ISO88025_HDR_LEN + rif_len, M_DONTWAIT);
404 if (m == 0)
405 senderr(ENOBUFS);
406 th = mtod(m, struct iso88025_header *);
407 bcopy((caddr_t)edst, (caddr_t)&gen_th.iso88025_dhost, ISO88025_ADDR_LEN);
408
409 /* Copy as much of the generic header as is needed into the mbuf */
410 memcpy(th, &gen_th, ISO88025_HDR_LEN + rif_len);
411
412 /*
413 * If a simplex interface, and the packet is being sent to our
414 * Ethernet address or a broadcast address, loopback a copy.
415 * XXX To make a simplex device behave exactly like a duplex
416 * device, we should copy in the case of sending to our own
417 * ethernet address (thus letting the original actually appear
418 * on the wire). However, we don't do that here for security
419 * reasons and compatibility with the original behavior.
420 */
421 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
422 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
423 struct mbuf *n;
424 n = m_copy(m, 0, (int)M_COPYALL);
425 (void) if_simloop(ifp, n, dst->sa_family,
426 ISO88025_HDR_LEN);
427 } else if (bcmp(th->iso88025_dhost, th->iso88025_shost,
428 ETHER_ADDR_LEN) == 0) {
429 (void) if_simloop(ifp, m, dst->sa_family,
430 ISO88025_HDR_LEN);
431 return(0); /* XXX */
432 }
433 }
434
435 IFQ_HANDOFF_ADJ(ifp, m, ISO88025_HDR_LEN + LLC_SNAPFRAMELEN, error);
436 if (error) {
437 printf("iso88025_output: packet dropped QFULL.\n");
438 ifp->if_oerrors++;
439 }
440 return (error);
441
442 bad:
443 ifp->if_oerrors++;
444 if (m)
445 m_freem(m);
446 return (error);
447 }
448
449 /*
450 * ISO 88025 de-encapsulation
451 */
452 void
453 iso88025_input(ifp, m)
454 struct ifnet *ifp;
455 struct mbuf *m;
456 {
457 struct iso88025_header *th;
458 struct llc *l;
459 int isr;
460 int mac_hdr_len;
461
462 /*
463 * Do consistency checks to verify assumptions
464 * made by code past this point.
465 */
466 if ((m->m_flags & M_PKTHDR) == 0) {
467 if_printf(ifp, "discard frame w/o packet header\n");
468 ifp->if_ierrors++;
469 m_freem(m);
470 return;
471 }
472 if (m->m_pkthdr.rcvif == NULL) {
473 if_printf(ifp, "discard frame w/o interface pointer\n");
474 ifp->if_ierrors++;
475 m_freem(m);
476 return;
477 }
478
479 m = m_pullup(m, ISO88025_HDR_LEN);
480 if (m == NULL) {
481 ifp->if_ierrors++;
482 goto dropanyway;
483 }
484 th = mtod(m, struct iso88025_header *);
485 m->m_pkthdr.header = (void *)th;
486
487 /*
488 * Discard packet if interface is not up.
489 */
490 if (!((ifp->if_flags & IFF_UP) &&
491 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
492 goto dropanyway;
493
494 /*
495 * Give bpf a chance at the packet.
496 */
497 BPF_MTAP(ifp, m);
498
499 /*
500 * Interface marked for monitoring; discard packet.
501 */
502 if (ifp->if_flags & IFF_MONITOR) {
503 m_freem(m);
504 return;
505 }
506
507 #ifdef MAC
508 mac_create_mbuf_from_ifnet(ifp, m);
509 #endif
510
511 /*
512 * Update interface statistics.
513 */
514 ifp->if_ibytes += m->m_pkthdr.len;
515 getmicrotime(&ifp->if_lastchange);
516
517 /*
518 * Discard non local unicast packets when interface
519 * is in promiscuous mode.
520 */
521 if ((ifp->if_flags & IFF_PROMISC) &&
522 ((th->iso88025_dhost[0] & 1) == 0) &&
523 (bcmp(IFP2ENADDR(ifp), (caddr_t) th->iso88025_dhost,
524 ISO88025_ADDR_LEN) != 0))
525 goto dropanyway;
526
527 /*
528 * Set mbuf flags for bcast/mcast.
529 */
530 if (th->iso88025_dhost[0] & 1) {
531 if (bcmp(iso88025_broadcastaddr, th->iso88025_dhost,
532 ISO88025_ADDR_LEN) == 0)
533 m->m_flags |= M_BCAST;
534 else
535 m->m_flags |= M_MCAST;
536 ifp->if_imcasts++;
537 }
538
539 mac_hdr_len = ISO88025_HDR_LEN;
540 /* Check for source routing info */
541 if (th->iso88025_shost[0] & TR_RII)
542 mac_hdr_len += TR_RCF_RIFLEN(th->rcf);
543
544 /* Strip off ISO88025 header. */
545 m_adj(m, mac_hdr_len);
546
547 m = m_pullup(m, LLC_SNAPFRAMELEN);
548 if (m == 0) {
549 ifp->if_ierrors++;
550 goto dropanyway;
551 }
552 l = mtod(m, struct llc *);
553
554 switch (l->llc_dsap) {
555 #ifdef IPX
556 case ETHERTYPE_IPX_8022: /* Thanks a bunch Novell */
557 if ((l->llc_control != LLC_UI) ||
558 (l->llc_ssap != ETHERTYPE_IPX_8022)) {
559 ifp->if_noproto++;
560 goto dropanyway;
561 }
562
563 th->iso88025_shost[0] &= ~(TR_RII);
564 m_adj(m, 3);
565 isr = NETISR_IPX;
566 break;
567 #endif /* IPX */
568 case LLC_SNAP_LSAP: {
569 u_int16_t type;
570 if ((l->llc_control != LLC_UI) ||
571 (l->llc_ssap != LLC_SNAP_LSAP)) {
572 ifp->if_noproto++;
573 goto dropanyway;
574 }
575
576 if (l->llc_snap.org_code[0] != 0 ||
577 l->llc_snap.org_code[1] != 0 ||
578 l->llc_snap.org_code[2] != 0) {
579 ifp->if_noproto++;
580 goto dropanyway;
581 }
582
583 type = ntohs(l->llc_snap.ether_type);
584 m_adj(m, LLC_SNAPFRAMELEN);
585 switch (type) {
586 #ifdef INET
587 case ETHERTYPE_IP:
588 th->iso88025_shost[0] &= ~(TR_RII);
589 if (ip_fastforward(m))
590 return;
591 isr = NETISR_IP;
592 break;
593
594 case ETHERTYPE_ARP:
595 if (ifp->if_flags & IFF_NOARP)
596 goto dropanyway;
597 isr = NETISR_ARP;
598 break;
599 #endif /* INET */
600 #ifdef IPX_SNAP /* XXX: Not supported! */
601 case ETHERTYPE_IPX:
602 th->iso88025_shost[0] &= ~(TR_RII);
603 isr = NETISR_IPX;
604 break;
605 #endif /* IPX_SNAP */
606 #ifdef INET6
607 case ETHERTYPE_IPV6:
608 th->iso88025_shost[0] &= ~(TR_RII);
609 isr = NETISR_IPV6;
610 break;
611 #endif /* INET6 */
612 default:
613 printf("iso88025_input: unexpected llc_snap ether_type 0x%02x\n", type);
614 ifp->if_noproto++;
615 goto dropanyway;
616 }
617 break;
618 }
619 #ifdef ISO
620 case LLC_ISO_LSAP:
621 switch (l->llc_control) {
622 case LLC_UI:
623 ifp->if_noproto++;
624 goto dropanyway;
625 break;
626 case LLC_XID:
627 case LLC_XID_P:
628 if(m->m_len < ISO88025_ADDR_LEN)
629 goto dropanyway;
630 l->llc_window = 0;
631 l->llc_fid = 9;
632 l->llc_class = 1;
633 l->llc_dsap = l->llc_ssap = 0;
634 /* Fall through to */
635 case LLC_TEST:
636 case LLC_TEST_P:
637 {
638 struct sockaddr sa;
639 struct arpcom *ac;
640 struct iso88025_sockaddr_data *th2;
641 int i;
642 u_char c;
643
644 c = l->llc_dsap;
645
646 if (th->iso88025_shost[0] & TR_RII) { /* XXX */
647 printf("iso88025_input: dropping source routed LLC_TEST\n");
648 goto dropanyway;
649 }
650 l->llc_dsap = l->llc_ssap;
651 l->llc_ssap = c;
652 if (m->m_flags & (M_BCAST | M_MCAST))
653 bcopy((caddr_t)IFP2ENADDR(ifp),
654 (caddr_t)th->iso88025_dhost,
655 ISO88025_ADDR_LEN);
656 sa.sa_family = AF_UNSPEC;
657 sa.sa_len = sizeof(sa);
658 th2 = (struct iso88025_sockaddr_data *)sa.sa_data;
659 for (i = 0; i < ISO88025_ADDR_LEN; i++) {
660 th2->ether_shost[i] = c = th->iso88025_dhost[i];
661 th2->ether_dhost[i] = th->iso88025_dhost[i] =
662 th->iso88025_shost[i];
663 th->iso88025_shost[i] = c;
664 }
665 th2->ac = TR_AC;
666 th2->fc = TR_LLC_FRAME;
667 ifp->if_output(ifp, m, &sa, NULL);
668 return;
669 }
670 default:
671 printf("iso88025_input: unexpected llc control 0x%02x\n", l->llc_control);
672 ifp->if_noproto++;
673 goto dropanyway;
674 break;
675 }
676 break;
677 #endif /* ISO */
678 default:
679 printf("iso88025_input: unknown dsap 0x%x\n", l->llc_dsap);
680 ifp->if_noproto++;
681 goto dropanyway;
682 break;
683 }
684
685 netisr_dispatch(isr, m);
686 return;
687
688 dropanyway:
689 ifp->if_iqdrops++;
690 if (m)
691 m_freem(m);
692 return;
693 }
694
695 static int
696 iso88025_resolvemulti (ifp, llsa, sa)
697 struct ifnet *ifp;
698 struct sockaddr **llsa;
699 struct sockaddr *sa;
700 {
701 struct sockaddr_dl *sdl;
702 struct sockaddr_in *sin;
703 #ifdef INET6
704 struct sockaddr_in6 *sin6;
705 #endif
706 u_char *e_addr;
707
708 switch(sa->sa_family) {
709 case AF_LINK:
710 /*
711 * No mapping needed. Just check that it's a valid MC address.
712 */
713 sdl = (struct sockaddr_dl *)sa;
714 e_addr = LLADDR(sdl);
715 if ((e_addr[0] & 1) != 1) {
716 return (EADDRNOTAVAIL);
717 }
718 *llsa = 0;
719 return (0);
720
721 #ifdef INET
722 case AF_INET:
723 sin = (struct sockaddr_in *)sa;
724 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr))) {
725 return (EADDRNOTAVAIL);
726 }
727 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
728 M_NOWAIT|M_ZERO);
729 if (sdl == NULL)
730 return (ENOMEM);
731 sdl->sdl_len = sizeof *sdl;
732 sdl->sdl_family = AF_LINK;
733 sdl->sdl_index = ifp->if_index;
734 sdl->sdl_type = IFT_ISO88025;
735 sdl->sdl_alen = ISO88025_ADDR_LEN;
736 e_addr = LLADDR(sdl);
737 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, e_addr);
738 *llsa = (struct sockaddr *)sdl;
739 return (0);
740 #endif
741 #ifdef INET6
742 case AF_INET6:
743 sin6 = (struct sockaddr_in6 *)sa;
744 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
745 /*
746 * An IP6 address of 0 means listen to all
747 * of the Ethernet multicast address used for IP6.
748 * (This is used for multicast routers.)
749 */
750 ifp->if_flags |= IFF_ALLMULTI;
751 *llsa = 0;
752 return (0);
753 }
754 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) {
755 return (EADDRNOTAVAIL);
756 }
757 MALLOC(sdl, struct sockaddr_dl *, sizeof *sdl, M_IFMADDR,
758 M_NOWAIT|M_ZERO);
759 if (sdl == NULL)
760 return (ENOMEM);
761 sdl->sdl_len = sizeof *sdl;
762 sdl->sdl_family = AF_LINK;
763 sdl->sdl_index = ifp->if_index;
764 sdl->sdl_type = IFT_ISO88025;
765 sdl->sdl_alen = ISO88025_ADDR_LEN;
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 MALLOC_DEFINE(M_ISO88025, "arpcom", "802.5 interface internals");
784
785 static void*
786 iso88025_alloc(u_char type, struct ifnet *ifp)
787 {
788 struct arpcom *ac;
789
790 ac = malloc(sizeof(struct arpcom), M_ISO88025, M_WAITOK | M_ZERO);
791 ac->ac_ifp = ifp;
792
793 return (ac);
794 }
795
796 static void
797 iso88025_free(void *com, u_char type)
798 {
799
800 free(com, M_ISO88025);
801 }
802
803 static int
804 iso88025_modevent(module_t mod, int type, void *data)
805 {
806
807 switch (type) {
808 case MOD_LOAD:
809 if_register_com_alloc(IFT_ISO88025, iso88025_alloc,
810 iso88025_free);
811 break;
812 case MOD_UNLOAD:
813 if_deregister_com_alloc(IFT_ISO88025);
814 break;
815 default:
816 return EOPNOTSUPP;
817 }
818
819 return (0);
820 }
821
822 static moduledata_t iso88025_mod = {
823 "iso88025",
824 iso88025_modevent,
825 0
826 };
827
828 DECLARE_MODULE(iso88025, iso88025_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
829 MODULE_VERSION(iso88025, 1);
Cache object: 515bb6214e6e0c25c044b420d7101801
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