1 /* $NetBSD: if_arcsubr.c,v 1.36 2001/06/14 05:44:23 itojun Exp $ */
2 /* $FreeBSD: stable/9/sys/net/if_arcsubr.c 249132 2013-04-05 08:22:11Z mav $ */
3
4 /*-
5 * Copyright (c) 1994, 1995 Ignatios Souvatzis
6 * Copyright (c) 1982, 1989, 1993
7 * The Regents of the University of California. All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * SUCH DAMAGE.
36 *
37 * from: NetBSD: if_ethersubr.c,v 1.9 1994/06/29 06:36:11 cgd Exp
38 * @(#)if_ethersubr.c 8.1 (Berkeley) 6/10/93
39 *
40 */
41 #include "opt_inet.h"
42 #include "opt_inet6.h"
43 #include "opt_ipx.h"
44
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
48 #include <sys/module.h>
49 #include <sys/malloc.h>
50 #include <sys/mbuf.h>
51 #include <sys/protosw.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/errno.h>
55 #include <sys/syslog.h>
56
57 #include <machine/cpu.h>
58
59 #include <net/if.h>
60 #include <net/netisr.h>
61 #include <net/route.h>
62 #include <net/if_dl.h>
63 #include <net/if_types.h>
64 #include <net/if_arc.h>
65 #include <net/if_arp.h>
66 #include <net/bpf.h>
67 #include <net/if_llatbl.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
75 #ifdef INET6
76 #include <netinet6/nd6.h>
77 #endif
78
79 #ifdef IPX
80 #include <netipx/ipx.h>
81 #include <netipx/ipx_if.h>
82 #endif
83
84 #define ARCNET_ALLOW_BROKEN_ARP
85
86 static struct mbuf *arc_defrag(struct ifnet *, struct mbuf *);
87 static int arc_resolvemulti(struct ifnet *, struct sockaddr **,
88 struct sockaddr *);
89
90 u_int8_t arcbroadcastaddr = 0;
91
92 #define ARC_LLADDR(ifp) (*(u_int8_t *)IF_LLADDR(ifp))
93
94 #define senderr(e) { error = (e); goto bad;}
95 #define SIN(s) ((struct sockaddr_in *)s)
96 #define SIPX(s) ((struct sockaddr_ipx *)s)
97
98 /*
99 * ARCnet output routine.
100 * Encapsulate a packet of type family for the local net.
101 * Assumes that ifp is actually pointer to arccom structure.
102 */
103 int
arc_output(struct ifnet * ifp,struct mbuf * m,struct sockaddr * dst,struct route * ro)104 arc_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst,
105 struct route *ro)
106 {
107 struct arc_header *ah;
108 int error;
109 u_int8_t atype, adst;
110 int loop_copy = 0;
111 int isphds;
112 #if defined(INET) || defined(INET6)
113 struct llentry *lle;
114 #endif
115
116 if (!((ifp->if_flags & IFF_UP) &&
117 (ifp->if_drv_flags & IFF_DRV_RUNNING)))
118 return(ENETDOWN); /* m, m1 aren't initialized yet */
119
120 error = 0;
121
122 switch (dst->sa_family) {
123 #ifdef INET
124 case AF_INET:
125
126 /*
127 * For now, use the simple IP addr -> ARCnet addr mapping
128 */
129 if (m->m_flags & (M_BCAST|M_MCAST))
130 adst = arcbroadcastaddr; /* ARCnet broadcast address */
131 else if (ifp->if_flags & IFF_NOARP)
132 adst = ntohl(SIN(dst)->sin_addr.s_addr) & 0xFF;
133 else {
134 error = arpresolve(ifp, ro ? ro->ro_rt : NULL,
135 m, dst, &adst, &lle);
136 if (error)
137 return (error == EWOULDBLOCK ? 0 : error);
138 }
139
140 atype = (ifp->if_flags & IFF_LINK0) ?
141 ARCTYPE_IP_OLD : ARCTYPE_IP;
142 break;
143 case AF_ARP:
144 {
145 struct arphdr *ah;
146 ah = mtod(m, struct arphdr *);
147 ah->ar_hrd = htons(ARPHRD_ARCNET);
148
149 loop_copy = -1; /* if this is for us, don't do it */
150
151 switch(ntohs(ah->ar_op)) {
152 case ARPOP_REVREQUEST:
153 case ARPOP_REVREPLY:
154 atype = ARCTYPE_REVARP;
155 break;
156 case ARPOP_REQUEST:
157 case ARPOP_REPLY:
158 default:
159 atype = ARCTYPE_ARP;
160 break;
161 }
162
163 if (m->m_flags & M_BCAST)
164 bcopy(ifp->if_broadcastaddr, &adst, ARC_ADDR_LEN);
165 else
166 bcopy(ar_tha(ah), &adst, ARC_ADDR_LEN);
167
168 }
169 break;
170 #endif
171 #ifdef INET6
172 case AF_INET6:
173 error = nd6_storelladdr(ifp, m, dst, (u_char *)&adst, &lle);
174 if (error)
175 return (error);
176 atype = ARCTYPE_INET6;
177 break;
178 #endif
179 #ifdef IPX
180 case AF_IPX:
181 adst = SIPX(dst)->sipx_addr.x_host.c_host[5];
182 atype = ARCTYPE_IPX;
183 if (adst == 0xff)
184 adst = arcbroadcastaddr;
185 break;
186 #endif
187
188 case AF_UNSPEC:
189 loop_copy = -1;
190 ah = (struct arc_header *)dst->sa_data;
191 adst = ah->arc_dhost;
192 atype = ah->arc_type;
193
194 if (atype == ARCTYPE_ARP) {
195 atype = (ifp->if_flags & IFF_LINK0) ?
196 ARCTYPE_ARP_OLD: ARCTYPE_ARP;
197
198 #ifdef ARCNET_ALLOW_BROKEN_ARP
199 /*
200 * XXX It's not clear per RFC826 if this is needed, but
201 * "assigned numbers" say this is wrong.
202 * However, e.g., AmiTCP 3.0Beta used it... we make this
203 * switchable for emergency cases. Not perfect, but...
204 */
205 if (ifp->if_flags & IFF_LINK2)
206 mtod(m, struct arphdr *)->ar_pro = atype - 1;
207 #endif
208 }
209 break;
210
211 default:
212 if_printf(ifp, "can't handle af%d\n", dst->sa_family);
213 senderr(EAFNOSUPPORT);
214 }
215
216 isphds = arc_isphds(atype);
217 M_PREPEND(m, isphds ? ARC_HDRNEWLEN : ARC_HDRLEN, M_DONTWAIT);
218 if (m == 0)
219 senderr(ENOBUFS);
220 ah = mtod(m, struct arc_header *);
221 ah->arc_type = atype;
222 ah->arc_dhost = adst;
223 ah->arc_shost = ARC_LLADDR(ifp);
224 if (isphds) {
225 ah->arc_flag = 0;
226 ah->arc_seqid = 0;
227 }
228
229 if ((ifp->if_flags & IFF_SIMPLEX) && (loop_copy != -1)) {
230 if ((m->m_flags & M_BCAST) || (loop_copy > 0)) {
231 struct mbuf *n = m_copy(m, 0, (int)M_COPYALL);
232
233 (void) if_simloop(ifp, n, dst->sa_family, ARC_HDRLEN);
234 } else if (ah->arc_dhost == ah->arc_shost) {
235 (void) if_simloop(ifp, m, dst->sa_family, ARC_HDRLEN);
236 return (0); /* XXX */
237 }
238 }
239
240 BPF_MTAP(ifp, m);
241
242 error = ifp->if_transmit(ifp, m);
243
244 return (error);
245
246 bad:
247 if (m)
248 m_freem(m);
249 return (error);
250 }
251
252 void
arc_frag_init(struct ifnet * ifp)253 arc_frag_init(struct ifnet *ifp)
254 {
255 struct arccom *ac;
256
257 ac = (struct arccom *)ifp->if_l2com;
258 ac->curr_frag = 0;
259 }
260
261 struct mbuf *
arc_frag_next(struct ifnet * ifp)262 arc_frag_next(struct ifnet *ifp)
263 {
264 struct arccom *ac;
265 struct mbuf *m;
266 struct arc_header *ah;
267
268 ac = (struct arccom *)ifp->if_l2com;
269 if ((m = ac->curr_frag) == 0) {
270 int tfrags;
271
272 /* dequeue new packet */
273 IF_DEQUEUE(&ifp->if_snd, m);
274 if (m == 0)
275 return 0;
276
277 ah = mtod(m, struct arc_header *);
278 if (!arc_isphds(ah->arc_type))
279 return m;
280
281 ++ac->ac_seqid; /* make the seqid unique */
282 tfrags = (m->m_pkthdr.len + ARC_MAX_DATA - 1) / ARC_MAX_DATA;
283 ac->fsflag = 2 * tfrags - 3;
284 ac->sflag = 0;
285 ac->rsflag = ac->fsflag;
286 ac->arc_dhost = ah->arc_dhost;
287 ac->arc_shost = ah->arc_shost;
288 ac->arc_type = ah->arc_type;
289
290 m_adj(m, ARC_HDRNEWLEN);
291 ac->curr_frag = m;
292 }
293
294 /* split out next fragment and return it */
295 if (ac->sflag < ac->fsflag) {
296 /* we CAN'T have short packets here */
297 ac->curr_frag = m_split(m, ARC_MAX_DATA, M_DONTWAIT);
298 if (ac->curr_frag == 0) {
299 m_freem(m);
300 return 0;
301 }
302
303 M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT);
304 if (m == 0) {
305 m_freem(ac->curr_frag);
306 ac->curr_frag = 0;
307 return 0;
308 }
309
310 ah = mtod(m, struct arc_header *);
311 ah->arc_flag = ac->rsflag;
312 ah->arc_seqid = ac->ac_seqid;
313
314 ac->sflag += 2;
315 ac->rsflag = ac->sflag;
316 } else if ((m->m_pkthdr.len >=
317 ARC_MIN_FORBID_LEN - ARC_HDRNEWLEN + 2) &&
318 (m->m_pkthdr.len <=
319 ARC_MAX_FORBID_LEN - ARC_HDRNEWLEN + 2)) {
320 ac->curr_frag = 0;
321
322 M_PREPEND(m, ARC_HDRNEWLEN_EXC, M_DONTWAIT);
323 if (m == 0)
324 return 0;
325
326 ah = mtod(m, struct arc_header *);
327 ah->arc_flag = 0xFF;
328 ah->arc_seqid = 0xFFFF;
329 ah->arc_type2 = ac->arc_type;
330 ah->arc_flag2 = ac->sflag;
331 ah->arc_seqid2 = ac->ac_seqid;
332 } else {
333 ac->curr_frag = 0;
334
335 M_PREPEND(m, ARC_HDRNEWLEN, M_DONTWAIT);
336 if (m == 0)
337 return 0;
338
339 ah = mtod(m, struct arc_header *);
340 ah->arc_flag = ac->sflag;
341 ah->arc_seqid = ac->ac_seqid;
342 }
343
344 ah->arc_dhost = ac->arc_dhost;
345 ah->arc_shost = ac->arc_shost;
346 ah->arc_type = ac->arc_type;
347
348 return m;
349 }
350
351 /*
352 * Defragmenter. Returns mbuf if last packet found, else
353 * NULL. frees imcoming mbuf as necessary.
354 */
355
356 static __inline struct mbuf *
arc_defrag(struct ifnet * ifp,struct mbuf * m)357 arc_defrag(struct ifnet *ifp, struct mbuf *m)
358 {
359 struct arc_header *ah, *ah1;
360 struct arccom *ac;
361 struct ac_frag *af;
362 struct mbuf *m1;
363 char *s;
364 int newflen;
365 u_char src,dst,typ;
366
367 ac = (struct arccom *)ifp->if_l2com;
368
369 if (m->m_len < ARC_HDRNEWLEN) {
370 m = m_pullup(m, ARC_HDRNEWLEN);
371 if (m == NULL) {
372 ++ifp->if_ierrors;
373 return NULL;
374 }
375 }
376
377 ah = mtod(m, struct arc_header *);
378 typ = ah->arc_type;
379
380 if (!arc_isphds(typ))
381 return m;
382
383 src = ah->arc_shost;
384 dst = ah->arc_dhost;
385
386 if (ah->arc_flag == 0xff) {
387 m_adj(m, 4);
388
389 if (m->m_len < ARC_HDRNEWLEN) {
390 m = m_pullup(m, ARC_HDRNEWLEN);
391 if (m == NULL) {
392 ++ifp->if_ierrors;
393 return NULL;
394 }
395 }
396
397 ah = mtod(m, struct arc_header *);
398 }
399
400 af = &ac->ac_fragtab[src];
401 m1 = af->af_packet;
402 s = "debug code error";
403
404 if (ah->arc_flag & 1) {
405 /*
406 * first fragment. We always initialize, which is
407 * about the right thing to do, as we only want to
408 * accept one fragmented packet per src at a time.
409 */
410 if (m1 != NULL)
411 m_freem(m1);
412
413 af->af_packet = m;
414 m1 = m;
415 af->af_maxflag = ah->arc_flag;
416 af->af_lastseen = 0;
417 af->af_seqid = ah->arc_seqid;
418
419 return NULL;
420 /* notreached */
421 } else {
422 /* check for unfragmented packet */
423 if (ah->arc_flag == 0)
424 return m;
425
426 /* do we have a first packet from that src? */
427 if (m1 == NULL) {
428 s = "no first frag";
429 goto outofseq;
430 }
431
432 ah1 = mtod(m1, struct arc_header *);
433
434 if (ah->arc_seqid != ah1->arc_seqid) {
435 s = "seqid differs";
436 goto outofseq;
437 }
438
439 if (typ != ah1->arc_type) {
440 s = "type differs";
441 goto outofseq;
442 }
443
444 if (dst != ah1->arc_dhost) {
445 s = "dest host differs";
446 goto outofseq;
447 }
448
449 /* typ, seqid and dst are ok here. */
450
451 if (ah->arc_flag == af->af_lastseen) {
452 m_freem(m);
453 return NULL;
454 }
455
456 if (ah->arc_flag == af->af_lastseen + 2) {
457 /* ok, this is next fragment */
458 af->af_lastseen = ah->arc_flag;
459 m_adj(m,ARC_HDRNEWLEN);
460
461 /*
462 * m_cat might free the first mbuf (with pkthdr)
463 * in 2nd chain; therefore:
464 */
465
466 newflen = m->m_pkthdr.len;
467
468 m_cat(m1,m);
469
470 m1->m_pkthdr.len += newflen;
471
472 /* is it the last one? */
473 if (af->af_lastseen > af->af_maxflag) {
474 af->af_packet = NULL;
475 return(m1);
476 } else
477 return NULL;
478 }
479 s = "other reason";
480 /* if all else fails, it is out of sequence, too */
481 }
482 outofseq:
483 if (m1) {
484 m_freem(m1);
485 af->af_packet = NULL;
486 }
487
488 if (m)
489 m_freem(m);
490
491 log(LOG_INFO,"%s: got out of seq. packet: %s\n",
492 ifp->if_xname, s);
493
494 return NULL;
495 }
496
497 /*
498 * return 1 if Packet Header Definition Standard, else 0.
499 * For now: old IP, old ARP aren't obviously. Lacking correct information,
500 * we guess that besides new IP and new ARP also IPX and APPLETALK are PHDS.
501 * (Apple and Novell corporations were involved, among others, in PHDS work).
502 * Easiest is to assume that everybody else uses that, too.
503 */
504 int
arc_isphds(u_int8_t type)505 arc_isphds(u_int8_t type)
506 {
507 return (type != ARCTYPE_IP_OLD &&
508 type != ARCTYPE_ARP_OLD &&
509 type != ARCTYPE_DIAGNOSE);
510 }
511
512 /*
513 * Process a received Arcnet packet;
514 * the packet is in the mbuf chain m with
515 * the ARCnet header.
516 */
517 void
arc_input(struct ifnet * ifp,struct mbuf * m)518 arc_input(struct ifnet *ifp, struct mbuf *m)
519 {
520 struct arc_header *ah;
521 int isr;
522 u_int8_t atype;
523
524 if ((ifp->if_flags & IFF_UP) == 0) {
525 m_freem(m);
526 return;
527 }
528
529 /* possibly defragment: */
530 m = arc_defrag(ifp, m);
531 if (m == NULL)
532 return;
533
534 BPF_MTAP(ifp, m);
535
536 ah = mtod(m, struct arc_header *);
537 /* does this belong to us? */
538 if ((ifp->if_flags & IFF_PROMISC) == 0
539 && ah->arc_dhost != arcbroadcastaddr
540 && ah->arc_dhost != ARC_LLADDR(ifp)) {
541 m_freem(m);
542 return;
543 }
544
545 ifp->if_ibytes += m->m_pkthdr.len;
546
547 if (ah->arc_dhost == arcbroadcastaddr) {
548 m->m_flags |= M_BCAST|M_MCAST;
549 ifp->if_imcasts++;
550 }
551
552 atype = ah->arc_type;
553 switch (atype) {
554 #ifdef INET
555 case ARCTYPE_IP:
556 m_adj(m, ARC_HDRNEWLEN);
557 if ((m = ip_fastforward(m)) == NULL)
558 return;
559 isr = NETISR_IP;
560 break;
561
562 case ARCTYPE_IP_OLD:
563 m_adj(m, ARC_HDRLEN);
564 if ((m = ip_fastforward(m)) == NULL)
565 return;
566 isr = NETISR_IP;
567 break;
568
569 case ARCTYPE_ARP:
570 if (ifp->if_flags & IFF_NOARP) {
571 /* Discard packet if ARP is disabled on interface */
572 m_freem(m);
573 return;
574 }
575 m_adj(m, ARC_HDRNEWLEN);
576 isr = NETISR_ARP;
577 #ifdef ARCNET_ALLOW_BROKEN_ARP
578 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
579 #endif
580 break;
581
582 case ARCTYPE_ARP_OLD:
583 if (ifp->if_flags & IFF_NOARP) {
584 /* Discard packet if ARP is disabled on interface */
585 m_freem(m);
586 return;
587 }
588 m_adj(m, ARC_HDRLEN);
589 isr = NETISR_ARP;
590 #ifdef ARCNET_ALLOW_BROKEN_ARP
591 mtod(m, struct arphdr *)->ar_pro = htons(ETHERTYPE_IP);
592 #endif
593 break;
594 #endif
595 #ifdef INET6
596 case ARCTYPE_INET6:
597 m_adj(m, ARC_HDRNEWLEN);
598 isr = NETISR_IPV6;
599 break;
600 #endif
601 #ifdef IPX
602 case ARCTYPE_IPX:
603 m_adj(m, ARC_HDRNEWLEN);
604 isr = NETISR_IPX;
605 break;
606 #endif
607 default:
608 m_freem(m);
609 return;
610 }
611 M_SETFIB(m, ifp->if_fib);
612 netisr_dispatch(isr, m);
613 }
614
615 /*
616 * Register (new) link level address.
617 */
618 void
arc_storelladdr(struct ifnet * ifp,u_int8_t lla)619 arc_storelladdr(struct ifnet *ifp, u_int8_t lla)
620 {
621 ARC_LLADDR(ifp) = lla;
622 }
623
624 /*
625 * Perform common duties while attaching to interface list
626 */
627 void
arc_ifattach(struct ifnet * ifp,u_int8_t lla)628 arc_ifattach(struct ifnet *ifp, u_int8_t lla)
629 {
630 struct ifaddr *ifa;
631 struct sockaddr_dl *sdl;
632 struct arccom *ac;
633
634 if_attach(ifp);
635 ifp->if_addrlen = 1;
636 ifp->if_hdrlen = ARC_HDRLEN;
637 ifp->if_mtu = 1500;
638 ifp->if_resolvemulti = arc_resolvemulti;
639 if (ifp->if_baudrate == 0)
640 ifp->if_baudrate = 2500000;
641 #if __FreeBSD_version < 500000
642 ifa = ifnet_addrs[ifp->if_index - 1];
643 #else
644 ifa = ifp->if_addr;
645 #endif
646 KASSERT(ifa != NULL, ("%s: no lladdr!\n", __func__));
647 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
648 sdl->sdl_type = IFT_ARCNET;
649 sdl->sdl_alen = ifp->if_addrlen;
650
651 if (ifp->if_flags & IFF_BROADCAST)
652 ifp->if_flags |= IFF_MULTICAST|IFF_ALLMULTI;
653
654 ac = (struct arccom *)ifp->if_l2com;
655 ac->ac_seqid = (time_second) & 0xFFFF; /* try to make seqid unique */
656 if (lla == 0) {
657 /* XXX this message isn't entirely clear, to me -- cgd */
658 log(LOG_ERR,"%s: link address 0 reserved for broadcasts. Please change it and ifconfig %s down up\n",
659 ifp->if_xname, ifp->if_xname);
660 }
661 arc_storelladdr(ifp, lla);
662
663 ifp->if_broadcastaddr = &arcbroadcastaddr;
664
665 bpfattach(ifp, DLT_ARCNET, ARC_HDRLEN);
666 }
667
668 void
arc_ifdetach(struct ifnet * ifp)669 arc_ifdetach(struct ifnet *ifp)
670 {
671 bpfdetach(ifp);
672 if_detach(ifp);
673 }
674
675 int
arc_ioctl(struct ifnet * ifp,u_long command,caddr_t data)676 arc_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
677 {
678 struct ifaddr *ifa = (struct ifaddr *) data;
679 struct ifreq *ifr = (struct ifreq *) data;
680 int error = 0;
681
682 switch (command) {
683 case SIOCSIFADDR:
684 ifp->if_flags |= IFF_UP;
685 switch (ifa->ifa_addr->sa_family) {
686 #ifdef INET
687 case AF_INET:
688 ifp->if_init(ifp->if_softc); /* before arpwhohas */
689 arp_ifinit(ifp, ifa);
690 break;
691 #endif
692 #ifdef IPX
693 /*
694 * XXX This code is probably wrong
695 */
696 case AF_IPX:
697 {
698 struct ipx_addr *ina = &(IA_SIPX(ifa)->sipx_addr);
699
700 if (ipx_nullhost(*ina))
701 ina->x_host.c_host[5] = ARC_LLADDR(ifp);
702 else
703 arc_storelladdr(ifp, ina->x_host.c_host[5]);
704
705 /*
706 * Set new address
707 */
708 ifp->if_init(ifp->if_softc);
709 break;
710 }
711 #endif
712 default:
713 ifp->if_init(ifp->if_softc);
714 break;
715 }
716 break;
717
718 case SIOCGIFADDR:
719 {
720 struct sockaddr *sa;
721
722 sa = (struct sockaddr *) &ifr->ifr_data;
723 *(u_int8_t *)sa->sa_data = ARC_LLADDR(ifp);
724 }
725 break;
726
727 case SIOCADDMULTI:
728 case SIOCDELMULTI:
729 if (ifr == NULL)
730 error = EAFNOSUPPORT;
731 else {
732 switch (ifr->ifr_addr.sa_family) {
733 case AF_INET:
734 case AF_INET6:
735 error = 0;
736 break;
737 default:
738 error = EAFNOSUPPORT;
739 break;
740 }
741 }
742 break;
743
744 case SIOCSIFMTU:
745 /*
746 * Set the interface MTU.
747 * mtu can't be larger than ARCMTU for RFC1051
748 * and can't be larger than ARC_PHDS_MTU
749 */
750 if (((ifp->if_flags & IFF_LINK0) && ifr->ifr_mtu > ARCMTU) ||
751 ifr->ifr_mtu > ARC_PHDS_MAXMTU)
752 error = EINVAL;
753 else
754 ifp->if_mtu = ifr->ifr_mtu;
755 break;
756 }
757
758 return (error);
759 }
760
761 /* based on ether_resolvemulti() */
762 int
arc_resolvemulti(struct ifnet * ifp,struct sockaddr ** llsa,struct sockaddr * sa)763 arc_resolvemulti(struct ifnet *ifp, struct sockaddr **llsa,
764 struct sockaddr *sa)
765 {
766 struct sockaddr_dl *sdl;
767 #ifdef INET
768 struct sockaddr_in *sin;
769 #endif
770 #ifdef INET6
771 struct sockaddr_in6 *sin6;
772 #endif
773
774 switch(sa->sa_family) {
775 case AF_LINK:
776 /*
777 * No mapping needed. Just check that it's a valid MC address.
778 */
779 sdl = (struct sockaddr_dl *)sa;
780 if (*LLADDR(sdl) != arcbroadcastaddr)
781 return EADDRNOTAVAIL;
782 *llsa = 0;
783 return 0;
784 #ifdef INET
785 case AF_INET:
786 sin = (struct sockaddr_in *)sa;
787 if (!IN_MULTICAST(ntohl(sin->sin_addr.s_addr)))
788 return EADDRNOTAVAIL;
789 sdl = malloc(sizeof *sdl, M_IFMADDR,
790 M_NOWAIT | M_ZERO);
791 if (sdl == NULL)
792 return ENOMEM;
793 sdl->sdl_len = sizeof *sdl;
794 sdl->sdl_family = AF_LINK;
795 sdl->sdl_index = ifp->if_index;
796 sdl->sdl_type = IFT_ARCNET;
797 sdl->sdl_alen = ARC_ADDR_LEN;
798 *LLADDR(sdl) = 0;
799 *llsa = (struct sockaddr *)sdl;
800 return 0;
801 #endif
802 #ifdef INET6
803 case AF_INET6:
804 sin6 = (struct sockaddr_in6 *)sa;
805 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
806 /*
807 * An IP6 address of 0 means listen to all
808 * of the Ethernet multicast address used for IP6.
809 * (This is used for multicast routers.)
810 */
811 ifp->if_flags |= IFF_ALLMULTI;
812 *llsa = 0;
813 return 0;
814 }
815 if (!IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr))
816 return EADDRNOTAVAIL;
817 sdl = malloc(sizeof *sdl, M_IFMADDR,
818 M_NOWAIT | M_ZERO);
819 if (sdl == NULL)
820 return ENOMEM;
821 sdl->sdl_len = sizeof *sdl;
822 sdl->sdl_family = AF_LINK;
823 sdl->sdl_index = ifp->if_index;
824 sdl->sdl_type = IFT_ARCNET;
825 sdl->sdl_alen = ARC_ADDR_LEN;
826 *LLADDR(sdl) = 0;
827 *llsa = (struct sockaddr *)sdl;
828 return 0;
829 #endif
830
831 default:
832 /*
833 * Well, the text isn't quite right, but it's the name
834 * that counts...
835 */
836 return EAFNOSUPPORT;
837 }
838 }
839
840 static MALLOC_DEFINE(M_ARCCOM, "arccom", "ARCNET interface internals");
841
842 static void*
arc_alloc(u_char type,struct ifnet * ifp)843 arc_alloc(u_char type, struct ifnet *ifp)
844 {
845 struct arccom *ac;
846
847 ac = malloc(sizeof(struct arccom), M_ARCCOM, M_WAITOK | M_ZERO);
848 ac->ac_ifp = ifp;
849
850 return (ac);
851 }
852
853 static void
arc_free(void * com,u_char type)854 arc_free(void *com, u_char type)
855 {
856
857 free(com, M_ARCCOM);
858 }
859
860 static int
arc_modevent(module_t mod,int type,void * data)861 arc_modevent(module_t mod, int type, void *data)
862 {
863
864 switch (type) {
865 case MOD_LOAD:
866 if_register_com_alloc(IFT_ARCNET, arc_alloc, arc_free);
867 break;
868 case MOD_UNLOAD:
869 if_deregister_com_alloc(IFT_ARCNET);
870 break;
871 default:
872 return EOPNOTSUPP;
873 }
874
875 return (0);
876 }
877
878 static moduledata_t arc_mod = {
879 "arcnet",
880 arc_modevent,
881 0
882 };
883
884 DECLARE_MODULE(arcnet, arc_mod, SI_SUB_INIT_IF, SI_ORDER_ANY);
885 MODULE_VERSION(arcnet, 1);
886