if_ethersubr.c revision 1.77 1 /* $NetBSD: if_ethersubr.c,v 1.77 2001/04/10 21:47:36 thorpej Exp $ */
2
3 /*
4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the project nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * Copyright (c) 1982, 1989, 1993
34 * The Regents of the University of California. All rights reserved.
35 *
36 * Redistribution and use in source and binary forms, with or without
37 * modification, are permitted provided that the following conditions
38 * are met:
39 * 1. Redistributions of source code must retain the above copyright
40 * notice, this list of conditions and the following disclaimer.
41 * 2. Redistributions in binary form must reproduce the above copyright
42 * notice, this list of conditions and the following disclaimer in the
43 * documentation and/or other materials provided with the distribution.
44 * 3. All advertising materials mentioning features or use of this software
45 * must display the following acknowledgement:
46 * This product includes software developed by the University of
47 * California, Berkeley and its contributors.
48 * 4. Neither the name of the University nor the names of its contributors
49 * may be used to endorse or promote products derived from this software
50 * without specific prior written permission.
51 *
52 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
53 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
54 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
55 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
56 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
57 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
58 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
59 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
60 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
61 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
62 * SUCH DAMAGE.
63 *
64 * @(#)if_ethersubr.c 8.2 (Berkeley) 4/4/96
65 */
66
67 #include "opt_inet.h"
68 #include "opt_atalk.h"
69 #include "opt_ccitt.h"
70 #include "opt_llc.h"
71 #include "opt_iso.h"
72 #include "opt_ns.h"
73 #include "opt_gateway.h"
74 #include "opt_pfil_hooks.h"
75 #include "vlan.h"
76 #include "bpfilter.h"
77
78 #include <sys/param.h>
79 #include <sys/systm.h>
80 #include <sys/kernel.h>
81 #include <sys/malloc.h>
82 #include <sys/mbuf.h>
83 #include <sys/protosw.h>
84 #include <sys/socket.h>
85 #include <sys/ioctl.h>
86 #include <sys/errno.h>
87 #include <sys/syslog.h>
88
89 #include <machine/cpu.h>
90
91 #include <net/if.h>
92 #include <net/netisr.h>
93 #include <net/route.h>
94 #include <net/if_llc.h>
95 #include <net/if_dl.h>
96 #include <net/if_types.h>
97
98 #if NBPFILTER > 0
99 #include <net/bpf.h>
100 #endif
101
102 #include <net/if_ether.h>
103 #if NVLAN > 0
104 #include <net/if_vlanvar.h>
105 #endif
106
107 #include <netinet/in.h>
108 #ifdef INET
109 #include <netinet/in_var.h>
110 #endif
111 #include <netinet/if_inarp.h>
112
113 #ifdef INET6
114 #ifndef INET
115 #include <netinet/in.h>
116 #endif
117 #include <netinet6/in6_var.h>
118 #include <netinet6/nd6.h>
119 #endif
120
121 #ifdef NS
122 #include <netns/ns.h>
123 #include <netns/ns_if.h>
124 #endif
125
126 #ifdef IPX
127 #include <netipx/ipx.h>
128 #include <netipx/ipx_if.h>
129 #endif
130
131 #ifdef ISO
132 #include <netiso/argo_debug.h>
133 #include <netiso/iso.h>
134 #include <netiso/iso_var.h>
135 #include <netiso/iso_snpac.h>
136 #endif
137
138 #ifdef LLC
139 #include <netccitt/dll.h>
140 #include <netccitt/llc_var.h>
141 #endif
142
143 #if defined(LLC) && defined(CCITT)
144 extern struct ifqueue pkintrq;
145 #endif
146
147 #ifdef NETATALK
148 #include <netatalk/at.h>
149 #include <netatalk/at_var.h>
150 #include <netatalk/at_extern.h>
151
152 #define llc_snap_org_code llc_un.type_snap.org_code
153 #define llc_snap_ether_type llc_un.type_snap.ether_type
154
155 extern u_char at_org_code[3];
156 extern u_char aarp_org_code[3];
157 #endif /* NETATALK */
158
159 u_char etherbroadcastaddr[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
160 #define senderr(e) { error = (e); goto bad;}
161
162 #define SIN(x) ((struct sockaddr_in *)x)
163
164 static int ether_output __P((struct ifnet *, struct mbuf *,
165 struct sockaddr *, struct rtentry *));
166 static void ether_input __P((struct ifnet *, struct mbuf *));
167
168 /*
169 * Ethernet output routine.
170 * Encapsulate a packet of type family for the local net.
171 * Assumes that ifp is actually pointer to ethercom structure.
172 */
173 static int
174 ether_output(struct ifnet *ifp, struct mbuf *m0, struct sockaddr *dst,
175 struct rtentry *rt0)
176 {
177 u_int16_t etype = 0;
178 int s, len, error = 0, hdrcmplt = 0;
179 u_char esrc[6], edst[6];
180 struct mbuf *m = m0;
181 struct rtentry *rt;
182 struct mbuf *mcopy = (struct mbuf *)0;
183 struct ether_header *eh;
184 ALTQ_DECL(struct altq_pktattr pktattr;)
185 #ifdef INET
186 struct arphdr *ah;
187 #endif /* INET */
188 #ifdef NETATALK
189 struct at_ifaddr *aa;
190 #endif /* NETATALK */
191 short mflags;
192
193 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) != (IFF_UP|IFF_RUNNING))
194 senderr(ENETDOWN);
195 ifp->if_lastchange = time;
196 if ((rt = rt0) != NULL) {
197 if ((rt->rt_flags & RTF_UP) == 0) {
198 if ((rt0 = rt = rtalloc1(dst, 1)) != NULL) {
199 rt->rt_refcnt--;
200 if (rt->rt_ifp != ifp)
201 return (*rt->rt_ifp->if_output)
202 (ifp, m0, dst, rt);
203 } else
204 senderr(EHOSTUNREACH);
205 }
206 if ((rt->rt_flags & RTF_GATEWAY) && dst->sa_family != AF_NS) {
207 if (rt->rt_gwroute == 0)
208 goto lookup;
209 if (((rt = rt->rt_gwroute)->rt_flags & RTF_UP) == 0) {
210 rtfree(rt); rt = rt0;
211 lookup: rt->rt_gwroute = rtalloc1(rt->rt_gateway, 1);
212 if ((rt = rt->rt_gwroute) == 0)
213 senderr(EHOSTUNREACH);
214 /* the "G" test below also prevents rt == rt0 */
215 if ((rt->rt_flags & RTF_GATEWAY) ||
216 (rt->rt_ifp != ifp)) {
217 rt->rt_refcnt--;
218 rt0->rt_gwroute = 0;
219 senderr(EHOSTUNREACH);
220 }
221 }
222 }
223 if (rt->rt_flags & RTF_REJECT)
224 if (rt->rt_rmx.rmx_expire == 0 ||
225 time.tv_sec < rt->rt_rmx.rmx_expire)
226 senderr(rt == rt0 ? EHOSTDOWN : EHOSTUNREACH);
227 }
228
229 switch (dst->sa_family) {
230
231 #ifdef INET
232 case AF_INET:
233 if (m->m_flags & M_BCAST)
234 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst,
235 sizeof(edst));
236
237 else if (m->m_flags & M_MCAST) {
238 ETHER_MAP_IP_MULTICAST(&SIN(dst)->sin_addr,
239 (caddr_t)edst)
240
241 } else if (!arpresolve(ifp, rt, m, dst, edst))
242 return (0); /* if not yet resolved */
243 /* If broadcasting on a simplex interface, loopback a copy */
244 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
245 mcopy = m_copy(m, 0, (int)M_COPYALL);
246 etype = htons(ETHERTYPE_IP);
247 break;
248
249 case AF_ARP:
250 ah = mtod(m, struct arphdr *);
251 if (m->m_flags & M_BCAST)
252 bcopy((caddr_t)etherbroadcastaddr, (caddr_t)edst,
253 sizeof(edst));
254 else
255 bcopy((caddr_t)ar_tha(ah),
256 (caddr_t)edst, sizeof(edst));
257
258 ah->ar_hrd = htons(ARPHRD_ETHER);
259
260 switch(ntohs(ah->ar_op)) {
261 case ARPOP_REVREQUEST:
262 case ARPOP_REVREPLY:
263 etype = htons(ETHERTYPE_REVARP);
264 break;
265
266 case ARPOP_REQUEST:
267 case ARPOP_REPLY:
268 default:
269 etype = htons(ETHERTYPE_ARP);
270 }
271
272 break;
273 #endif
274 #ifdef INET6
275 case AF_INET6:
276 #ifdef OLDIP6OUTPUT
277 if (!nd6_resolve(ifp, rt, m, dst, (u_char *)edst))
278 return(0); /* if not yet resolves */
279 #else
280 if (!nd6_storelladdr(ifp, rt, m, dst, (u_char *)edst)){
281 /* something bad happened */
282 return(0);
283 }
284 #endif /* OLDIP6OUTPUT */
285 etype = htons(ETHERTYPE_IPV6);
286 break;
287 #endif
288 #ifdef NETATALK
289 case AF_APPLETALK:
290 if (!aarpresolve(ifp, m, (struct sockaddr_at *)dst, edst)) {
291 #ifdef NETATALKDEBUG
292 printf("aarpresolv failed\n");
293 #endif /* NETATALKDEBUG */
294 return (0);
295 }
296 /*
297 * ifaddr is the first thing in at_ifaddr
298 */
299 aa = (struct at_ifaddr *) at_ifawithnet(
300 (struct sockaddr_at *)dst, ifp);
301 if (aa == NULL)
302 goto bad;
303
304 /*
305 * In the phase 2 case, we need to prepend an mbuf for the
306 * llc header. Since we must preserve the value of m,
307 * which is passed to us by value, we m_copy() the first
308 * mbuf, and use it for our llc header.
309 */
310 if (aa->aa_flags & AFA_PHASE2) {
311 struct llc llc;
312
313 M_PREPEND(m, sizeof(struct llc), M_DONTWAIT);
314 llc.llc_dsap = llc.llc_ssap = LLC_SNAP_LSAP;
315 llc.llc_control = LLC_UI;
316 bcopy(at_org_code, llc.llc_snap_org_code,
317 sizeof(llc.llc_snap_org_code));
318 llc.llc_snap_ether_type = htons(ETHERTYPE_ATALK);
319 bcopy(&llc, mtod(m, caddr_t), sizeof(struct llc));
320 } else {
321 etype = htons(ETHERTYPE_ATALK);
322 }
323 break;
324 #endif /* NETATALK */
325 #ifdef NS
326 case AF_NS:
327 etype = htons(ETHERTYPE_NS);
328 bcopy((caddr_t)&(((struct sockaddr_ns *)dst)->sns_addr.x_host),
329 (caddr_t)edst, sizeof (edst));
330 if (!bcmp((caddr_t)edst, (caddr_t)&ns_thishost, sizeof(edst)))
331 return (looutput(ifp, m, dst, rt));
332 /* If broadcasting on a simplex interface, loopback a copy */
333 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
334 mcopy = m_copy(m, 0, (int)M_COPYALL);
335 break;
336 #endif
337 #ifdef IPX
338 case AF_IPX:
339 etype = htons(ETHERTYPE_IPX);
340 bcopy((caddr_t)&(((struct sockaddr_ipx *)dst)->sipx_addr.x_host),
341 (caddr_t)edst, sizeof (edst));
342 /* If broadcasting on a simplex interface, loopback a copy */
343 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX))
344 mcopy = m_copy(m, 0, (int)M_COPYALL);
345 break;
346 #endif
347 #ifdef ISO
348 case AF_ISO: {
349 int snpalen;
350 struct llc *l;
351 struct sockaddr_dl *sdl;
352
353 if (rt && (sdl = (struct sockaddr_dl *)rt->rt_gateway) &&
354 sdl->sdl_family == AF_LINK && sdl->sdl_alen > 0) {
355 bcopy(LLADDR(sdl), (caddr_t)edst, sizeof(edst));
356 } else {
357 error = iso_snparesolve(ifp, (struct sockaddr_iso *)dst,
358 (char *)edst, &snpalen);
359 if (error)
360 goto bad; /* Not Resolved */
361 }
362 /* If broadcasting on a simplex interface, loopback a copy */
363 if (*edst & 1)
364 m->m_flags |= (M_BCAST|M_MCAST);
365 if ((m->m_flags & M_BCAST) && (ifp->if_flags & IFF_SIMPLEX) &&
366 (mcopy = m_copy(m, 0, (int)M_COPYALL))) {
367 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT);
368 if (mcopy) {
369 eh = mtod(mcopy, struct ether_header *);
370 bcopy((caddr_t)edst,
371 (caddr_t)eh->ether_dhost, sizeof (edst));
372 bcopy(LLADDR(ifp->if_sadl),
373 (caddr_t)eh->ether_shost, sizeof (edst));
374 }
375 }
376 M_PREPEND(m, 3, M_DONTWAIT);
377 if (m == NULL)
378 return (0);
379 l = mtod(m, struct llc *);
380 l->llc_dsap = l->llc_ssap = LLC_ISO_LSAP;
381 l->llc_control = LLC_UI;
382 #ifdef ARGO_DEBUG
383 if (argo_debug[D_ETHER]) {
384 int i;
385 printf("unoutput: sending pkt to: ");
386 for (i=0; i<6; i++)
387 printf("%x ", edst[i] & 0xff);
388 printf("\n");
389 }
390 #endif
391 } break;
392 #endif /* ISO */
393 #ifdef LLC
394 /* case AF_NSAP: */
395 case AF_CCITT: {
396 struct sockaddr_dl *sdl =
397 (struct sockaddr_dl *) rt -> rt_gateway;
398
399 if (sdl && sdl->sdl_family == AF_LINK
400 && sdl->sdl_alen > 0) {
401 bcopy(LLADDR(sdl), (char *)edst,
402 sizeof(edst));
403 } else goto bad; /* Not a link interface ? Funny ... */
404 if ((ifp->if_flags & IFF_SIMPLEX) && (*edst & 1) &&
405 (mcopy = m_copy(m, 0, (int)M_COPYALL))) {
406 M_PREPEND(mcopy, sizeof (*eh), M_DONTWAIT);
407 if (mcopy) {
408 eh = mtod(mcopy, struct ether_header *);
409 bcopy((caddr_t)edst,
410 (caddr_t)eh->ether_dhost, sizeof (edst));
411 bcopy(LLADDR(ifp->if_sadl),
412 (caddr_t)eh->ether_shost, sizeof (edst));
413 }
414 }
415 #ifdef LLC_DEBUG
416 {
417 int i;
418 struct llc *l = mtod(m, struct llc *);
419
420 printf("ether_output: sending LLC2 pkt to: ");
421 for (i=0; i<6; i++)
422 printf("%x ", edst[i] & 0xff);
423 printf(" len 0x%x dsap 0x%x ssap 0x%x control 0x%x\n",
424 m->m_pkthdr.len, l->llc_dsap & 0xff, l->llc_ssap &0xff,
425 l->llc_control & 0xff);
426
427 }
428 #endif /* LLC_DEBUG */
429 } break;
430 #endif /* LLC */
431
432 case pseudo_AF_HDRCMPLT:
433 hdrcmplt = 1;
434 eh = (struct ether_header *)dst->sa_data;
435 bcopy((caddr_t)eh->ether_shost, (caddr_t)esrc, sizeof (esrc));
436 /* FALLTHROUGH */
437
438 case AF_UNSPEC:
439 eh = (struct ether_header *)dst->sa_data;
440 bcopy((caddr_t)eh->ether_dhost, (caddr_t)edst, sizeof (edst));
441 /* AF_UNSPEC doesn't swap the byte order of the ether_type. */
442 etype = eh->ether_type;
443 break;
444
445 default:
446 printf("%s: can't handle af%d\n", ifp->if_xname,
447 dst->sa_family);
448 senderr(EAFNOSUPPORT);
449 }
450
451 if (mcopy)
452 (void) looutput(ifp, mcopy, dst, rt);
453
454 /* If no ether type is set, this must be a 802.2 formatted packet.
455 */
456 if (etype == 0)
457 etype = htons(m->m_pkthdr.len);
458 /*
459 * Add local net header. If no space in first mbuf,
460 * allocate another.
461 */
462 M_PREPEND(m, sizeof (struct ether_header), M_DONTWAIT);
463 if (m == 0)
464 senderr(ENOBUFS);
465 eh = mtod(m, struct ether_header *);
466 bcopy((caddr_t)&etype,(caddr_t)&eh->ether_type,
467 sizeof(eh->ether_type));
468 bcopy((caddr_t)edst, (caddr_t)eh->ether_dhost, sizeof (edst));
469 if (hdrcmplt)
470 bcopy((caddr_t)esrc, (caddr_t)eh->ether_shost,
471 sizeof(eh->ether_shost));
472 else
473 bcopy(LLADDR(ifp->if_sadl), (caddr_t)eh->ether_shost,
474 sizeof(eh->ether_shost));
475
476 #ifdef PFIL_HOOKS
477 if ((error = pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_OUT)) != 0)
478 return (error);
479 if (m == NULL)
480 return (0);
481 #endif
482
483 #ifdef ALTQ
484 /*
485 * If ALTQ is enabled on the parent interface, do
486 * classification; the queueing discipline might not
487 * require classification, but might require the
488 * address family/header pointer in the pktattr.
489 */
490 if (ALTQ_IS_ENABLED(&ifp->if_snd))
491 altq_etherclassify(&ifp->if_snd, m, &pktattr);
492 #endif
493
494 mflags = m->m_flags;
495 len = m->m_pkthdr.len;
496 s = splimp();
497 /*
498 * Queue message on interface, and start output if interface
499 * not yet active.
500 */
501 IFQ_ENQUEUE(&ifp->if_snd, m, &pktattr, error);
502 if (error) {
503 /* mbuf is already freed */
504 splx(s);
505 return (error);
506 }
507 ifp->if_obytes += len;
508 if (mflags & M_MCAST)
509 ifp->if_omcasts++;
510 if ((ifp->if_flags & IFF_OACTIVE) == 0)
511 (*ifp->if_start)(ifp);
512 splx(s);
513 return (error);
514
515 bad:
516 if (m)
517 m_freem(m);
518 return (error);
519 }
520
521 #ifdef ALTQ
522 /*
523 * This routine is a slight hack to allow a packet to be classified
524 * if the Ethernet headers are present. It will go away when ALTQ's
525 * classification engine understands link headers.
526 */
527 void
528 altq_etherclassify(struct ifaltq *ifq, struct mbuf *m,
529 struct altq_pktattr *pktattr)
530 {
531 struct ether_header *eh;
532 u_int16_t ether_type;
533 int hlen, af, hdrsize;
534 caddr_t hdr;
535
536 hlen = ETHER_HDR_LEN;
537 eh = mtod(m, struct ether_header *);
538
539 ether_type = htons(eh->ether_type);
540
541 if (ether_type < ETHERMTU) {
542 /* LLC/SNAP */
543 struct llc *llc = (struct llc *)(eh + 1);
544 hlen += 8;
545
546 if (m->m_len < hlen ||
547 llc->llc_dsap != LLC_SNAP_LSAP ||
548 llc->llc_ssap != LLC_SNAP_LSAP ||
549 llc->llc_control != LLC_UI) {
550 /* Not SNAP. */
551 goto bad;
552 }
553
554 ether_type = htons(llc->llc_un.type_snap.ether_type);
555 }
556
557 switch (ether_type) {
558 case ETHERTYPE_IP:
559 af = AF_INET;
560 hdrsize = 20; /* sizeof(struct ip) */
561 break;
562
563 case ETHERTYPE_IPV6:
564 af = AF_INET6;
565 hdrsize = 40; /* sizeof(struct ip6_hdr) */
566 break;
567
568 default:
569 af = AF_UNSPEC;
570 hdrsize = 0;
571 break;
572 }
573
574 if (m->m_len < (hlen + hdrsize)) {
575 /*
576 * Ethernet and protocol header not in a single
577 * mbuf. We can't cope with this situation right
578 * now (but it shouldn't ever happen, really, anyhow).
579 * XXX Should use m_pulldown().
580 */
581 printf("altq_etherclassify: headers span multiple mbufs\n");
582 goto bad;
583 }
584
585 m->m_data += hlen;
586 m->m_len -= hlen;
587
588 hdr = mtod(m, caddr_t);
589
590 if (ALTQ_NEEDS_CLASSIFY(ifq))
591 pktattr->pattr_class =
592 (*ifq->altq_classify)(ifq->altq_clfier, m, af);
593 pktattr->pattr_af = af;
594 pktattr->pattr_hdr = hdr;
595
596 m->m_data -= hlen;
597 m->m_len += hlen;
598
599 return;
600
601 bad:
602 pktattr->pattr_class = NULL;
603 pktattr->pattr_hdr = NULL;
604 pktattr->pattr_af = AF_UNSPEC;
605 }
606 #endif /* ALTQ */
607
608 /*
609 * Process a received Ethernet packet;
610 * the packet is in the mbuf chain m with
611 * the ether header.
612 */
613 static void
614 ether_input(struct ifnet *ifp, struct mbuf *m)
615 {
616 struct ifqueue *inq;
617 u_int16_t etype;
618 int s;
619 struct ether_header *eh;
620 struct mbuf *n;
621 #if defined (ISO) || defined (LLC) || defined(NETATALK)
622 struct llc *l;
623 #endif
624
625 if ((ifp->if_flags & IFF_UP) == 0) {
626 m_freem(m);
627 return;
628 }
629
630 eh = mtod(m, struct ether_header *);
631 etype = ntohs(eh->ether_type);
632
633 /*
634 * Determine if the packet is within its size limits.
635 */
636 if (m->m_pkthdr.len > ETHER_MAX_FRAME(etype, m->m_flags & M_HASFCS)) {
637 printf("%s: discarding oversize frame (len=%d)\n",
638 ifp->if_xname, m->m_pkthdr.len);
639 m_freem(m);
640 return;
641 }
642
643 #ifdef PFIL_HOOKS
644 if (pfil_run_hooks(&ifp->if_pfil, &m, ifp, PFIL_IN) != 0)
645 return;
646 if (m == NULL)
647 return;
648
649 eh = mtod(m, struct ether_header *);
650 etype = ntohs(eh->ether_type);
651 #endif
652
653 ifp->if_lastchange = time;
654 ifp->if_ibytes += m->m_pkthdr.len;
655 if (ETHER_IS_MULTICAST(eh->ether_dhost)) {
656 if (memcmp(etherbroadcastaddr,
657 eh->ether_dhost, ETHER_ADDR_LEN) == 0)
658 m->m_flags |= M_BCAST;
659 else
660 m->m_flags |= M_MCAST;
661 ifp->if_imcasts++;
662 } else if ((ifp->if_flags & IFF_PROMISC) != 0 &&
663 memcmp(LLADDR(ifp->if_sadl), eh->ether_dhost,
664 ETHER_ADDR_LEN) != 0) {
665 m_freem(m);
666 return;
667 }
668
669 /* Check if the mbuf has a VLAN tag */
670 n = m_aux_find(m, AF_LINK, ETHERTYPE_VLAN);
671 if (n) {
672 #if NVLAN > 0
673 /*
674 * vlan_input() will either recursively call ether_input()
675 * or drop the packet.
676 */
677 if (((struct ethercom *)ifp)->ec_nvlans != 0)
678 vlan_input(ifp, m);
679 else
680 #endif
681 m_freem(m);
682 return;
683 }
684
685 /*
686 * Handle protocols that expect to have the Ethernet header
687 * (and possibly FCS) intact.
688 */
689 switch (etype) {
690 #if NVLAN > 0
691 case ETHERTYPE_VLAN:
692 /*
693 * vlan_input() will either recursively call ether_input()
694 * or drop the packet.
695 */
696 if (((struct ethercom *)ifp)->ec_nvlans != 0)
697 vlan_input(ifp, m);
698 else
699 m_freem(m);
700 return;
701 #endif /* NVLAN > 0 */
702 default:
703 /* Nothing. */
704 }
705
706 /* Strip off the Ethernet header. */
707 m_adj(m, sizeof(struct ether_header));
708
709 /* If the CRC is still on the packet, trim it off. */
710 if (m->m_flags & M_HASFCS)
711 m_adj(m, -ETHER_CRC_LEN);
712
713 switch (etype) {
714 #ifdef INET
715 case ETHERTYPE_IP:
716 #ifdef GATEWAY
717 if (ipflow_fastforward(m))
718 return;
719 #endif
720 schednetisr(NETISR_IP);
721 inq = &ipintrq;
722 break;
723
724 case ETHERTYPE_ARP:
725 schednetisr(NETISR_ARP);
726 inq = &arpintrq;
727 break;
728
729 case ETHERTYPE_REVARP:
730 revarpinput(m); /* XXX queue? */
731 return;
732 #endif
733 #ifdef INET6
734 case ETHERTYPE_IPV6:
735 schednetisr(NETISR_IPV6);
736 inq = &ip6intrq;
737 break;
738 #endif
739 #ifdef NS
740 case ETHERTYPE_NS:
741 schednetisr(NETISR_NS);
742 inq = &nsintrq;
743 break;
744
745 #endif
746 #ifdef IPX
747 case ETHERTYPE_IPX:
748 schednetisr(NETISR_IPX);
749 inq = &ipxintrq;
750 break;
751 #endif
752 #ifdef NETATALK
753 case ETHERTYPE_ATALK:
754 schednetisr(NETISR_ATALK);
755 inq = &atintrq1;
756 break;
757 case ETHERTYPE_AARP:
758 /* probably this should be done with a NETISR as well */
759 aarpinput(ifp, m); /* XXX */
760 return;
761 #endif /* NETATALK */
762 default:
763 #if defined (ISO) || defined (LLC) || defined (NETATALK)
764 if (etype > ETHERMTU)
765 goto dropanyway;
766 l = mtod(m, struct llc *);
767 switch (l->llc_dsap) {
768 #ifdef NETATALK
769 case LLC_SNAP_LSAP:
770 switch (l->llc_control) {
771 case LLC_UI:
772 if (l->llc_ssap != LLC_SNAP_LSAP) {
773 goto dropanyway;
774 }
775
776 if (Bcmp(&(l->llc_snap_org_code)[0],
777 at_org_code, sizeof(at_org_code)) == 0 &&
778 ntohs(l->llc_snap_ether_type) ==
779 ETHERTYPE_ATALK) {
780 inq = &atintrq2;
781 m_adj(m, sizeof(struct llc));
782 schednetisr(NETISR_ATALK);
783 break;
784 }
785
786 if (Bcmp(&(l->llc_snap_org_code)[0],
787 aarp_org_code,
788 sizeof(aarp_org_code)) == 0 &&
789 ntohs(l->llc_snap_ether_type) ==
790 ETHERTYPE_AARP) {
791 m_adj( m, sizeof(struct llc));
792 aarpinput(ifp, m); /* XXX */
793 return;
794 }
795
796 default:
797 goto dropanyway;
798 }
799 break;
800 #endif /* NETATALK */
801 #ifdef ISO
802 case LLC_ISO_LSAP:
803 switch (l->llc_control) {
804 case LLC_UI:
805 /* LLC_UI_P forbidden in class 1 service */
806 if ((l->llc_dsap == LLC_ISO_LSAP) &&
807 (l->llc_ssap == LLC_ISO_LSAP)) {
808 /* LSAP for ISO */
809 if (m->m_pkthdr.len > etype)
810 m_adj(m, etype - m->m_pkthdr.len);
811 m->m_data += 3; /* XXX */
812 m->m_len -= 3; /* XXX */
813 m->m_pkthdr.len -= 3; /* XXX */
814 M_PREPEND(m, sizeof *eh, M_DONTWAIT);
815 if (m == 0)
816 return;
817 *mtod(m, struct ether_header *) = *eh;
818 #ifdef ARGO_DEBUG
819 if (argo_debug[D_ETHER])
820 printf("clnp packet");
821 #endif
822 schednetisr(NETISR_ISO);
823 inq = &clnlintrq;
824 break;
825 }
826 goto dropanyway;
827
828 case LLC_XID:
829 case LLC_XID_P:
830 if(m->m_len < 6)
831 goto dropanyway;
832 l->llc_window = 0;
833 l->llc_fid = 9;
834 l->llc_class = 1;
835 l->llc_dsap = l->llc_ssap = 0;
836 /* Fall through to */
837 case LLC_TEST:
838 case LLC_TEST_P:
839 {
840 struct sockaddr sa;
841 struct ether_header *eh2;
842 int i;
843 u_char c = l->llc_dsap;
844
845 l->llc_dsap = l->llc_ssap;
846 l->llc_ssap = c;
847 if (m->m_flags & (M_BCAST | M_MCAST))
848 bcopy(LLADDR(ifp->if_sadl),
849 (caddr_t)eh->ether_dhost, 6);
850 sa.sa_family = AF_UNSPEC;
851 sa.sa_len = sizeof(sa);
852 eh2 = (struct ether_header *)sa.sa_data;
853 for (i = 0; i < 6; i++) {
854 eh2->ether_shost[i] = c =
855 eh->ether_dhost[i];
856 eh2->ether_dhost[i] =
857 eh->ether_dhost[i] =
858 eh->ether_shost[i];
859 eh->ether_shost[i] = c;
860 }
861 ifp->if_output(ifp, m, &sa, NULL);
862 return;
863 }
864 default:
865 m_freem(m);
866 return;
867 }
868 break;
869 #endif /* ISO */
870 #ifdef LLC
871 case LLC_X25_LSAP:
872 {
873 if (m->m_pkthdr.len > etype)
874 m_adj(m, etype - m->m_pkthdr.len);
875 M_PREPEND(m, sizeof(struct sdl_hdr) , M_DONTWAIT);
876 if (m == 0)
877 return;
878 if ( !sdl_sethdrif(ifp, eh->ether_shost, LLC_X25_LSAP,
879 eh->ether_dhost, LLC_X25_LSAP, 6,
880 mtod(m, struct sdl_hdr *)))
881 panic("ETHER cons addr failure");
882 mtod(m, struct sdl_hdr *)->sdlhdr_len = etype;
883 #ifdef LLC_DEBUG
884 printf("llc packet\n");
885 #endif /* LLC_DEBUG */
886 schednetisr(NETISR_CCITT);
887 inq = &llcintrq;
888 break;
889 }
890 #endif /* LLC */
891 dropanyway:
892 default:
893 m_freem(m);
894 return;
895 }
896 #else /* ISO || LLC || NETATALK*/
897 m_freem(m);
898 return;
899 #endif /* ISO || LLC || NETATALK*/
900 }
901
902 s = splimp();
903 if (IF_QFULL(inq)) {
904 IF_DROP(inq);
905 m_freem(m);
906 } else
907 IF_ENQUEUE(inq, m);
908 splx(s);
909 }
910
911 /*
912 * Convert Ethernet address to printable (loggable) representation.
913 */
914 static char digits[] = "0123456789abcdef";
915 char *
916 ether_sprintf(const u_char *ap)
917 {
918 static char etherbuf[18];
919 char *cp = etherbuf;
920 int i;
921
922 for (i = 0; i < 6; i++) {
923 *cp++ = digits[*ap >> 4];
924 *cp++ = digits[*ap++ & 0xf];
925 *cp++ = ':';
926 }
927 *--cp = 0;
928 return (etherbuf);
929 }
930
931 /*
932 * Perform common duties while attaching to interface list
933 */
934 void
935 ether_ifattach(struct ifnet *ifp, const u_int8_t *lla)
936 {
937
938 ifp->if_type = IFT_ETHER;
939 ifp->if_addrlen = ETHER_ADDR_LEN;
940 ifp->if_hdrlen = 14;
941 ifp->if_dlt = DLT_EN10MB;
942 ifp->if_mtu = ETHERMTU;
943 ifp->if_output = ether_output;
944 ifp->if_input = ether_input;
945 if (ifp->if_baudrate == 0)
946 ifp->if_baudrate = IF_Mbps(10); /* just a default */
947
948 if_alloc_sadl(ifp);
949 memcpy(LLADDR(ifp->if_sadl), lla, ifp->if_addrlen);
950
951 LIST_INIT(&((struct ethercom *)ifp)->ec_multiaddrs);
952 ifp->if_broadcastaddr = etherbroadcastaddr;
953 #if NBPFILTER > 0
954 bpfattach(ifp, DLT_EN10MB, sizeof(struct ether_header));
955 #endif
956 }
957
958 void
959 ether_ifdetach(struct ifnet *ifp)
960 {
961 struct ethercom *ec = (void *) ifp;
962 struct ether_multi *enm;
963 int s;
964
965 #if NBPFILTER > 0
966 bpfdetach(ifp);
967 #endif
968
969 #if NVLAN > 0
970 if (ec->ec_nvlans)
971 vlan_ifdetach(ifp);
972 #endif
973
974 s = splimp();
975 while ((enm = LIST_FIRST(&ec->ec_multiaddrs)) != NULL) {
976 LIST_REMOVE(enm, enm_list);
977 free(enm, M_IFADDR);
978 ec->ec_multicnt--;
979 }
980 splx(s);
981
982 if_free_sadl(ifp);
983 }
984
985 #if 0
986 /*
987 * This is for reference. We have a table-driven version
988 * of the little-endian crc32 generator, which is faster
989 * than the double-loop.
990 */
991 u_int32_t
992 ether_crc32_le(const u_int8_t *buf, size_t len)
993 {
994 u_int32_t c, crc, carry;
995 size_t i, j;
996
997 crc = 0xffffffffU; /* initial value */
998
999 for (i = 0; i < len; i++) {
1000 c = buf[i];
1001 for (j = 0; j < 8; j++) {
1002 carry = ((crc & 0x01) ? 1 : 0) ^ (c & 0x01);
1003 crc >>= 1;
1004 c >>= 1;
1005 if (carry)
1006 crc = (crc ^ ETHER_CRC_POLY_LE);
1007 }
1008 }
1009
1010 return (crc);
1011 }
1012 #else
1013 u_int32_t
1014 ether_crc32_le(const u_int8_t *buf, size_t len)
1015 {
1016 static const u_int32_t crctab[] = {
1017 0x00000000, 0x1db71064, 0x3b6e20c8, 0x26d930ac,
1018 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
1019 0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c,
1020 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c
1021 };
1022 u_int32_t crc;
1023 int i;
1024
1025 crc = 0xffffffffU; /* initial value */
1026
1027 for (i = 0; i < len; i++) {
1028 crc ^= buf[i];
1029 crc = (crc >> 4) ^ crctab[crc & 0xf];
1030 crc = (crc >> 4) ^ crctab[crc & 0xf];
1031 }
1032
1033 return (crc);
1034 }
1035 #endif
1036
1037 u_int32_t
1038 ether_crc32_be(const u_int8_t *buf, size_t len)
1039 {
1040 u_int32_t c, crc, carry;
1041 size_t i, j;
1042
1043 crc = 0xffffffffU; /* initial value */
1044
1045 for (i = 0; i < len; i++) {
1046 c = buf[i];
1047 for (j = 0; j < 8; j++) {
1048 carry = ((crc & 0x80000000U) ? 1 : 0) ^ (c & 0x01);
1049 crc <<= 1;
1050 c >>= 1;
1051 if (carry)
1052 crc = (crc ^ ETHER_CRC_POLY_BE) | carry;
1053 }
1054 }
1055
1056 return (crc);
1057 }
1058
1059 #ifdef INET
1060 u_char ether_ipmulticast_min[6] = { 0x01, 0x00, 0x5e, 0x00, 0x00, 0x00 };
1061 u_char ether_ipmulticast_max[6] = { 0x01, 0x00, 0x5e, 0x7f, 0xff, 0xff };
1062 #endif
1063 #ifdef INET6
1064 u_char ether_ip6multicast_min[6] = { 0x33, 0x33, 0x00, 0x00, 0x00, 0x00 };
1065 u_char ether_ip6multicast_max[6] = { 0x33, 0x33, 0xff, 0xff, 0xff, 0xff };
1066 #endif
1067
1068 /*
1069 * Convert a sockaddr into an Ethernet address or range of Ethernet
1070 * addresses.
1071 */
1072 int
1073 ether_multiaddr(struct sockaddr *sa, u_int8_t addrlo[ETHER_ADDR_LEN],
1074 u_int8_t addrhi[ETHER_ADDR_LEN])
1075 {
1076 #ifdef INET
1077 struct sockaddr_in *sin;
1078 #endif /* INET */
1079 #ifdef INET6
1080 struct sockaddr_in6 *sin6;
1081 #endif /* INET6 */
1082
1083 switch (sa->sa_family) {
1084
1085 case AF_UNSPEC:
1086 bcopy(sa->sa_data, addrlo, ETHER_ADDR_LEN);
1087 bcopy(addrlo, addrhi, ETHER_ADDR_LEN);
1088 break;
1089
1090 #ifdef INET
1091 case AF_INET:
1092 sin = satosin(sa);
1093 if (sin->sin_addr.s_addr == INADDR_ANY) {
1094 /*
1095 * An IP address of INADDR_ANY means listen to
1096 * or stop listening to all of the Ethernet
1097 * multicast addresses used for IP.
1098 * (This is for the sake of IP multicast routers.)
1099 */
1100 bcopy(ether_ipmulticast_min, addrlo, ETHER_ADDR_LEN);
1101 bcopy(ether_ipmulticast_max, addrhi, ETHER_ADDR_LEN);
1102 }
1103 else {
1104 ETHER_MAP_IP_MULTICAST(&sin->sin_addr, addrlo);
1105 bcopy(addrlo, addrhi, ETHER_ADDR_LEN);
1106 }
1107 break;
1108 #endif
1109 #ifdef INET6
1110 case AF_INET6:
1111 sin6 = satosin6(sa);
1112 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) {
1113 /*
1114 * An IP6 address of 0 means listen to or stop
1115 * listening to all of the Ethernet multicast
1116 * address used for IP6.
1117 * (This is used for multicast routers.)
1118 */
1119 bcopy(ether_ip6multicast_min, addrlo, ETHER_ADDR_LEN);
1120 bcopy(ether_ip6multicast_max, addrhi, ETHER_ADDR_LEN);
1121 } else {
1122 ETHER_MAP_IPV6_MULTICAST(&sin6->sin6_addr, addrlo);
1123 bcopy(addrlo, addrhi, ETHER_ADDR_LEN);
1124 }
1125 break;
1126 #endif
1127
1128 default:
1129 return (EAFNOSUPPORT);
1130 }
1131 return (0);
1132 }
1133
1134 /*
1135 * Add an Ethernet multicast address or range of addresses to the list for a
1136 * given interface.
1137 */
1138 int
1139 ether_addmulti(struct ifreq *ifr, struct ethercom *ec)
1140 {
1141 struct ether_multi *enm;
1142 u_char addrlo[ETHER_ADDR_LEN];
1143 u_char addrhi[ETHER_ADDR_LEN];
1144 int s = splimp(), error;
1145
1146 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi);
1147 if (error != 0) {
1148 splx(s);
1149 return (error);
1150 }
1151
1152 /*
1153 * Verify that we have valid Ethernet multicast addresses.
1154 */
1155 if ((addrlo[0] & 0x01) != 1 || (addrhi[0] & 0x01) != 1) {
1156 splx(s);
1157 return (EINVAL);
1158 }
1159 /*
1160 * See if the address range is already in the list.
1161 */
1162 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm);
1163 if (enm != NULL) {
1164 /*
1165 * Found it; just increment the reference count.
1166 */
1167 ++enm->enm_refcount;
1168 splx(s);
1169 return (0);
1170 }
1171 /*
1172 * New address or range; malloc a new multicast record
1173 * and link it into the interface's multicast list.
1174 */
1175 enm = (struct ether_multi *)malloc(sizeof(*enm), M_IFMADDR, M_NOWAIT);
1176 if (enm == NULL) {
1177 splx(s);
1178 return (ENOBUFS);
1179 }
1180 bcopy(addrlo, enm->enm_addrlo, 6);
1181 bcopy(addrhi, enm->enm_addrhi, 6);
1182 enm->enm_ec = ec;
1183 enm->enm_refcount = 1;
1184 LIST_INSERT_HEAD(&ec->ec_multiaddrs, enm, enm_list);
1185 ec->ec_multicnt++;
1186 splx(s);
1187 /*
1188 * Return ENETRESET to inform the driver that the list has changed
1189 * and its reception filter should be adjusted accordingly.
1190 */
1191 return (ENETRESET);
1192 }
1193
1194 /*
1195 * Delete a multicast address record.
1196 */
1197 int
1198 ether_delmulti(struct ifreq *ifr, struct ethercom *ec)
1199 {
1200 struct ether_multi *enm;
1201 u_char addrlo[ETHER_ADDR_LEN];
1202 u_char addrhi[ETHER_ADDR_LEN];
1203 int s = splimp(), error;
1204
1205 error = ether_multiaddr(&ifr->ifr_addr, addrlo, addrhi);
1206 if (error != 0) {
1207 splx(s);
1208 return (error);
1209 }
1210
1211 /*
1212 * Look ur the address in our list.
1213 */
1214 ETHER_LOOKUP_MULTI(addrlo, addrhi, ec, enm);
1215 if (enm == NULL) {
1216 splx(s);
1217 return (ENXIO);
1218 }
1219 if (--enm->enm_refcount != 0) {
1220 /*
1221 * Still some claims to this record.
1222 */
1223 splx(s);
1224 return (0);
1225 }
1226 /*
1227 * No remaining claims to this record; unlink and free it.
1228 */
1229 LIST_REMOVE(enm, enm_list);
1230 free(enm, M_IFMADDR);
1231 ec->ec_multicnt--;
1232 splx(s);
1233 /*
1234 * Return ENETRESET to inform the driver that the list has changed
1235 * and its reception filter should be adjusted accordingly.
1236 */
1237 return (ENETRESET);
1238 }
1239
1240 /*
1241 * Common ioctls for Ethernet interfaces. Note, we must be
1242 * called at splnet().
1243 */
1244 int
1245 ether_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
1246 {
1247 struct ethercom *ec = (void *) ifp;
1248 struct ifreq *ifr = (struct ifreq *)data;
1249 struct ifaddr *ifa = (struct ifaddr *)data;
1250 int error = 0;
1251
1252 switch (cmd) {
1253 case SIOCSIFADDR:
1254 ifp->if_flags |= IFF_UP;
1255 switch (ifa->ifa_addr->sa_family) {
1256 case AF_LINK:
1257 {
1258 struct sockaddr_dl *sdl =
1259 (struct sockaddr_dl *) ifa->ifa_addr;
1260
1261 if (sdl->sdl_type != IFT_ETHER ||
1262 sdl->sdl_alen != ifp->if_addrlen) {
1263 error = EINVAL;
1264 break;
1265 }
1266
1267 memcpy(LLADDR(ifp->if_sadl), LLADDR(sdl),
1268 ifp->if_addrlen);
1269
1270 /* Set new address. */
1271 error = (*ifp->if_init)(ifp);
1272 break;
1273 }
1274 #ifdef INET
1275 case AF_INET:
1276 if ((error = (*ifp->if_init)(ifp)) != 0)
1277 break;
1278 arp_ifinit(ifp, ifa);
1279 break;
1280 #endif /* INET */
1281 #ifdef NS
1282 case AF_NS:
1283 {
1284 struct ns_addr *ina = &IA_SNS(ifa)->sns_addr;
1285
1286 if (ns_nullhost(*ina))
1287 ina->x_host = *(union ns_host *)
1288 LLADDR(ifp->if_sadl);
1289 else
1290 memcpy(LLADDR(ifp->if_sadl),
1291 ina->x_host.c_host, ifp->if_addrlen);
1292 /* Set new address. */
1293 error = (*ifp->if_init)(ifp);
1294 break;
1295 }
1296 #endif /* NS */
1297 default:
1298 error = (*ifp->if_init)(ifp);
1299 break;
1300 }
1301 break;
1302
1303 case SIOCGIFADDR:
1304 memcpy(((struct sockaddr *)&ifr->ifr_data)->sa_data,
1305 LLADDR(ifp->if_sadl), ETHER_ADDR_LEN);
1306 break;
1307
1308 case SIOCSIFMTU:
1309 if (ifr->ifr_mtu > ETHERMTU)
1310 error = EINVAL;
1311 else
1312 ifp->if_mtu = ifr->ifr_mtu;
1313 break;
1314
1315 case SIOCSIFFLAGS:
1316 if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_RUNNING) {
1317 /*
1318 * If interface is marked down and it is running,
1319 * then stop and disable it.
1320 */
1321 (*ifp->if_stop)(ifp, 1);
1322 } else if ((ifp->if_flags & (IFF_UP|IFF_RUNNING)) == IFF_UP) {
1323 /*
1324 * If interface is marked up and it is stopped, then
1325 * start it.
1326 */
1327 error = (*ifp->if_init)(ifp);
1328 } else if ((ifp->if_flags & IFF_UP) != 0) {
1329 /*
1330 * Reset the interface to pick up changes in any other
1331 * flags that affect the hardware state.
1332 */
1333 error = (*ifp->if_init)(ifp);
1334 }
1335 break;
1336
1337 case SIOCADDMULTI:
1338 error = ether_addmulti(ifr, ec);
1339 break;
1340
1341 case SIOCDELMULTI:
1342 error = ether_delmulti(ifr, ec);
1343 break;
1344
1345 default:
1346 error = ENOTTY;
1347 }
1348
1349 return (error);
1350 }
1351