148};
149
150static int
151netopen(dev_t dev, int flag, int mode, struct thread *td)
152{
153 return (0);
154}
155
156static int
157netclose(dev_t dev, int flags, int fmt, struct thread *td)
158{
159 return (0);
160}
161
162static int
163netioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
164{
165 struct ifnet *ifp;
166 int error, idx;
167
168 /* only support interface specific ioctls */
169 if (IOCGROUP(cmd) != 'i')
170 return (EOPNOTSUPP);
171 idx = minor(dev);
172 if (idx == 0) {
173 /*
174 * special network device, not interface.
175 */
176 if (cmd == SIOCGIFCONF)
177 return (ifconf(cmd, data)); /* XXX remove cmd */
178 return (EOPNOTSUPP);
179 }
180
181 ifp = ifnet_byindex(idx);
182 if (ifp == NULL)
183 return (ENXIO);
184
185 error = ifhwioctl(cmd, ifp, data, td);
186 if (error == ENOIOCTL)
187 error = EOPNOTSUPP;
188 return (error);
189}
190
191static int
192netkqfilter(dev_t dev, struct knote *kn)
193{
194 struct klist *klist;
195 struct ifnet *ifp;
196 int idx;
197
198 idx = minor(dev);
199 if (idx == 0) {
200 klist = &ifklist;
201 } else {
202 ifp = ifnet_byindex(idx);
203 if (ifp == NULL)
204 return (1);
205 klist = &ifp->if_klist;
206 }
207
208 switch (kn->kn_filter) {
209 case EVFILT_NETDEV:
210 kn->kn_fop = &netdev_filtops;
211 break;
212 default:
213 return (1);
214 }
215
216 kn->kn_hook = (caddr_t)klist;
217
218 /* XXX locking? */
219 SLIST_INSERT_HEAD(klist, kn, kn_selnext);
220
221 return (0);
222}
223
224static void
225filt_netdetach(struct knote *kn)
226{
227 struct klist *klist = (struct klist *)kn->kn_hook;
228
229 if (kn->kn_status & KN_DETACHED)
230 return;
231 SLIST_REMOVE(klist, kn, knote, kn_selnext);
232}
233
234static int
235filt_netdev(struct knote *kn, long hint)
236{
237
238 /*
239 * Currently NOTE_EXIT is abused to indicate device detach.
240 */
241 if (hint == NOTE_EXIT) {
242 kn->kn_data = NOTE_LINKINV;
243 kn->kn_status |= KN_DETACHED;
244 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
245 return (1);
246 }
247 kn->kn_data = hint; /* current status */
248 if (kn->kn_sfflags & hint)
249 kn->kn_fflags |= hint;
250 return (kn->kn_fflags != 0);
251}
252
253/*
254 * Network interface utility routines.
255 *
256 * Routines with ifa_ifwith* names take sockaddr *'s as
257 * parameters.
258 */
259/* ARGSUSED*/
260static void
261if_init(dummy)
262 void *dummy;
263{
264
265 IFNET_LOCK_INIT();
266 TAILQ_INIT(&ifnet);
267 SLIST_INIT(&ifklist);
268 if_grow(); /* create initial table */
269 ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
270 UID_ROOT, GID_WHEEL, 0600, "network");
271}
272
273static void
274if_grow(void)
275{
276 u_int n;
277 struct ifindex_entry *e;
278
279 if_indexlim <<= 1;
280 n = if_indexlim * sizeof(*e);
281 e = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
282 if (ifindex_table != NULL) {
283 memcpy((caddr_t)e, (caddr_t)ifindex_table, n/2);
284 free((caddr_t)ifindex_table, M_IFADDR);
285 }
286 ifindex_table = e;
287}
288
289/* ARGSUSED*/
290static void
291if_check(dummy)
292 void *dummy;
293{
294 struct ifnet *ifp;
295 int s;
296
297 s = splimp();
298 IFNET_RLOCK(); /* could sleep on rare error; mostly okay XXX */
299 TAILQ_FOREACH(ifp, &ifnet, if_link) {
300 if (ifp->if_snd.ifq_maxlen == 0) {
301 printf("%s%d XXX: driver didn't set ifq_maxlen\n",
302 ifp->if_name, ifp->if_unit);
303 ifp->if_snd.ifq_maxlen = ifqmaxlen;
304 }
305 if (!mtx_initialized(&ifp->if_snd.ifq_mtx)) {
306 printf("%s%d XXX: driver didn't initialize queue mtx\n",
307 ifp->if_name, ifp->if_unit);
308 mtx_init(&ifp->if_snd.ifq_mtx, "unknown",
309 MTX_NETWORK_LOCK, MTX_DEF);
310 }
311 }
312 IFNET_RUNLOCK();
313 splx(s);
314 if_slowtimo(0);
315}
316
317static int
318if_findindex(struct ifnet *ifp)
319{
320 int i, unit;
321 char eaddr[18], devname[32];
322 const char *name, *p;
323
324 switch (ifp->if_type) {
325 case IFT_ETHER: /* these types use struct arpcom */
326 case IFT_FDDI:
327 case IFT_XETHER:
328 case IFT_ISO88025:
329 case IFT_L2VLAN:
330 snprintf(eaddr, 18, "%6D",
331 ((struct arpcom *)ifp->if_softc)->ac_enaddr, ":");
332 break;
333 default:
334 eaddr[0] = '\0';
335 break;
336 }
337 snprintf(devname, 32, "%s%d", ifp->if_name, ifp->if_unit);
338 name = net_cdevsw.d_name;
339 i = 0;
340 while ((resource_find_dev(&i, name, &unit, NULL, NULL)) == 0) {
341 if (resource_string_value(name, unit, "ether", &p) == 0)
342 if (strcmp(p, eaddr) == 0)
343 goto found;
344 if (resource_string_value(name, unit, "dev", &p) == 0)
345 if (strcmp(p, devname) == 0)
346 goto found;
347 }
348 unit = 0;
349found:
350 if (unit != 0) {
351 if (ifaddr_byindex(unit) == NULL)
352 return (unit);
353 printf("%s%d in use, cannot hardwire it to %s.\n",
354 name, unit, devname);
355 }
356 for (unit = 1; ; unit++) {
357 if (unit <= if_index && ifaddr_byindex(unit) != NULL)
358 continue;
359 if (resource_string_value(name, unit, "ether", &p) == 0 ||
360 resource_string_value(name, unit, "dev", &p) == 0)
361 continue;
362 break;
363 }
364 return (unit);
365}
366
367/*
368 * Attach an interface to the
369 * list of "active" interfaces.
370 */
371void
372if_attach(ifp)
373 struct ifnet *ifp;
374{
375 unsigned socksize, ifasize;
376 int namelen, masklen;
377 char workbuf[64];
378 register struct sockaddr_dl *sdl;
379 register struct ifaddr *ifa;
380
381 IFNET_WLOCK();
382 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
383 IFNET_WUNLOCK();
384 /*
385 * XXX -
386 * The old code would work if the interface passed a pre-existing
387 * chain of ifaddrs to this code. We don't trust our callers to
388 * properly initialize the tailq, however, so we no longer allow
389 * this unlikely case.
390 */
391 TAILQ_INIT(&ifp->if_addrhead);
392 TAILQ_INIT(&ifp->if_prefixhead);
393 TAILQ_INIT(&ifp->if_multiaddrs);
394 SLIST_INIT(&ifp->if_klist);
395 getmicrotime(&ifp->if_lastchange);
396
397#ifdef MAC
398 mac_init_ifnet(ifp);
399 mac_create_ifnet(ifp);
400#endif
401
402 ifp->if_index = if_findindex(ifp);
403 if (ifp->if_index > if_index)
404 if_index = ifp->if_index;
405 if (if_index >= if_indexlim)
406 if_grow();
407
408 ifnet_byindex(ifp->if_index) = ifp;
409 ifdev_byindex(ifp->if_index) = make_dev(&net_cdevsw, ifp->if_index,
410 UID_ROOT, GID_WHEEL, 0600, "%s/%s%d",
411 net_cdevsw.d_name, ifp->if_name, ifp->if_unit);
412 make_dev_alias(ifdev_byindex(ifp->if_index), "%s%d",
413 net_cdevsw.d_name, ifp->if_index);
414
415 mtx_init(&ifp->if_snd.ifq_mtx, ifp->if_name, "if send queue", MTX_DEF);
416
417 /*
418 * create a Link Level name for this device
419 */
420 namelen = snprintf(workbuf, sizeof(workbuf),
421 "%s%d", ifp->if_name, ifp->if_unit);
422#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
423 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
424 socksize = masklen + ifp->if_addrlen;
425#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
426 if (socksize < sizeof(*sdl))
427 socksize = sizeof(*sdl);
428 socksize = ROUNDUP(socksize);
429 ifasize = sizeof(*ifa) + 2 * socksize;
430 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
431 if (ifa) {
432 IFA_LOCK_INIT(ifa);
433 sdl = (struct sockaddr_dl *)(ifa + 1);
434 sdl->sdl_len = socksize;
435 sdl->sdl_family = AF_LINK;
436 bcopy(workbuf, sdl->sdl_data, namelen);
437 sdl->sdl_nlen = namelen;
438 sdl->sdl_index = ifp->if_index;
439 sdl->sdl_type = ifp->if_type;
440 ifaddr_byindex(ifp->if_index) = ifa;
441 ifa->ifa_ifp = ifp;
442 ifa->ifa_rtrequest = link_rtrequest;
443 ifa->ifa_addr = (struct sockaddr *)sdl;
444 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
445 ifa->ifa_netmask = (struct sockaddr *)sdl;
446 sdl->sdl_len = masklen;
447 while (namelen != 0)
448 sdl->sdl_data[--namelen] = 0xff;
449 ifa->ifa_refcnt = 1;
450 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
451 }
452 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
453
454 /* Announce the interface. */
455 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
456}
457
458/*
459 * Detach an interface, removing it from the
460 * list of "active" interfaces.
461 */
462void
463if_detach(ifp)
464 struct ifnet *ifp;
465{
466 struct ifaddr *ifa;
467 struct radix_node_head *rnh;
468 int s;
469 int i;
470
471 /*
472 * Remove routes and flush queues.
473 */
474 s = splnet();
475 if_down(ifp);
476
477 /*
478 * Remove address from ifindex_table[] and maybe decrement if_index.
479 * Clean up all addresses.
480 */
481 ifaddr_byindex(ifp->if_index) = NULL;
482 revoke_and_destroy_dev(ifdev_byindex(ifp->if_index));
483 ifdev_byindex(ifp->if_index) = NULL;
484
485 while (if_index > 0 && ifaddr_byindex(if_index) == NULL)
486 if_index--;
487
488 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
489 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
490#ifdef INET
491 /* XXX: Ugly!! ad hoc just for INET */
492 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
493 struct ifaliasreq ifr;
494
495 bzero(&ifr, sizeof(ifr));
496 ifr.ifra_addr = *ifa->ifa_addr;
497 if (ifa->ifa_dstaddr)
498 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
499 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
500 NULL) == 0)
501 continue;
502 }
503#endif /* INET */
504#ifdef INET6
505 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
506 in6_purgeaddr(ifa);
507 /* ifp_addrhead is already updated */
508 continue;
509 }
510#endif /* INET6 */
511 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
512 IFAFREE(ifa);
513 }
514
515#ifdef INET6
516 /*
517 * Remove all IPv6 kernel structs related to ifp. This should be done
518 * before removing routing entries below, since IPv6 interface direct
519 * routes are expected to be removed by the IPv6-specific kernel API.
520 * Otherwise, the kernel will detect some inconsistency and bark it.
521 */
522 in6_ifdetach(ifp);
523#endif
524
525 /*
526 * Delete all remaining routes using this interface
527 * Unfortuneatly the only way to do this is to slog through
528 * the entire routing table looking for routes which point
529 * to this interface...oh well...
530 */
531 for (i = 1; i <= AF_MAX; i++) {
532 if ((rnh = rt_tables[i]) == NULL)
533 continue;
534 RADIX_NODE_HEAD_LOCK(rnh);
535 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
536 RADIX_NODE_HEAD_UNLOCK(rnh);
537 }
538
539 /* Announce that the interface is gone. */
540 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
541
542#ifdef MAC
543 mac_destroy_ifnet(ifp);
544#endif /* MAC */
545 KNOTE(&ifp->if_klist, NOTE_EXIT);
546 IFNET_WLOCK();
547 TAILQ_REMOVE(&ifnet, ifp, if_link);
548 IFNET_WUNLOCK();
549 mtx_destroy(&ifp->if_snd.ifq_mtx);
550 splx(s);
551}
552
553/*
554 * Delete Routes for a Network Interface
555 *
556 * Called for each routing entry via the rnh->rnh_walktree() call above
557 * to delete all route entries referencing a detaching network interface.
558 *
559 * Arguments:
560 * rn pointer to node in the routing table
561 * arg argument passed to rnh->rnh_walktree() - detaching interface
562 *
563 * Returns:
564 * 0 successful
565 * errno failed - reason indicated
566 *
567 */
568static int
569if_rtdel(rn, arg)
570 struct radix_node *rn;
571 void *arg;
572{
573 struct rtentry *rt = (struct rtentry *)rn;
574 struct ifnet *ifp = arg;
575 int err;
576
577 if (rt->rt_ifp == ifp) {
578
579 /*
580 * Protect (sorta) against walktree recursion problems
581 * with cloned routes
582 */
583 if ((rt->rt_flags & RTF_UP) == 0)
584 return (0);
585
586 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
587 rt_mask(rt), rt->rt_flags,
588 (struct rtentry **) NULL);
589 if (err) {
590 log(LOG_WARNING, "if_rtdel: error %d\n", err);
591 }
592 }
593
594 return (0);
595}
596
597/*
598 * Create a clone network interface.
599 */
600int
601if_clone_create(name, len)
602 char *name;
603 int len;
604{
605 struct if_clone *ifc;
606 char *dp;
607 int wildcard, bytoff, bitoff;
608 int unit;
609 int err;
610
611 ifc = if_clone_lookup(name, &unit);
612 if (ifc == NULL)
613 return (EINVAL);
614
615 if (ifunit(name) != NULL)
616 return (EEXIST);
617
618 bytoff = bitoff = 0;
619 wildcard = (unit < 0);
620 /*
621 * Find a free unit if none was given.
622 */
623 if (wildcard) {
624 while ((bytoff < ifc->ifc_bmlen)
625 && (ifc->ifc_units[bytoff] == 0xff))
626 bytoff++;
627 if (bytoff >= ifc->ifc_bmlen)
628 return (ENOSPC);
629 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
630 bitoff++;
631 unit = (bytoff << 3) + bitoff;
632 }
633
634 if (unit > ifc->ifc_maxunit)
635 return (ENXIO);
636
637 err = (*ifc->ifc_create)(ifc, unit);
638 if (err != 0)
639 return (err);
640
641 if (!wildcard) {
642 bytoff = unit >> 3;
643 bitoff = unit - (bytoff << 3);
644 }
645
646 /*
647 * Allocate the unit in the bitmap.
648 */
649 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
650 ("%s: bit is already set", __func__));
651 ifc->ifc_units[bytoff] |= (1 << bitoff);
652
653 /* In the wildcard case, we need to update the name. */
654 if (wildcard) {
655 for (dp = name; *dp != '\0'; dp++);
656 if (snprintf(dp, len - (dp-name), "%d", unit) >
657 len - (dp-name) - 1) {
658 /*
659 * This can only be a programmer error and
660 * there's no straightforward way to recover if
661 * it happens.
662 */
663 panic("if_clone_create(): interface name too long");
664 }
665
666 }
667
668 return (0);
669}
670
671/*
672 * Destroy a clone network interface.
673 */
674int
675if_clone_destroy(name)
676 const char *name;
677{
678 struct if_clone *ifc;
679 struct ifnet *ifp;
680 int bytoff, bitoff;
681 int unit;
682
683 ifc = if_clone_lookup(name, &unit);
684 if (ifc == NULL)
685 return (EINVAL);
686
687 if (unit < ifc->ifc_minifs)
688 return (EINVAL);
689
690 ifp = ifunit(name);
691 if (ifp == NULL)
692 return (ENXIO);
693
694 if (ifc->ifc_destroy == NULL)
695 return (EOPNOTSUPP);
696
697 (*ifc->ifc_destroy)(ifp);
698
699 /*
700 * Compute offset in the bitmap and deallocate the unit.
701 */
702 bytoff = unit >> 3;
703 bitoff = unit - (bytoff << 3);
704 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
705 ("%s: bit is already cleared", __func__));
706 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
707 return (0);
708}
709
710/*
711 * Look up a network interface cloner.
712 */
713static struct if_clone *
714if_clone_lookup(name, unitp)
715 const char *name;
716 int *unitp;
717{
718 struct if_clone *ifc;
719 const char *cp;
720 int i;
721
722 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
723 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
724 if (ifc->ifc_name[i] != *cp)
725 goto next_ifc;
726 }
727 goto found_name;
728 next_ifc:
729 ifc = LIST_NEXT(ifc, ifc_list);
730 }
731
732 /* No match. */
733 return ((struct if_clone *)NULL);
734
735 found_name:
736 if (*cp == '\0') {
737 i = -1;
738 } else {
739 for (i = 0; *cp != '\0'; cp++) {
740 if (*cp < '0' || *cp > '9') {
741 /* Bogus unit number. */
742 return (NULL);
743 }
744 i = (i * 10) + (*cp - '0');
745 }
746 }
747
748 if (unitp != NULL)
749 *unitp = i;
750 return (ifc);
751}
752
753/*
754 * Register a network interface cloner.
755 */
756void
757if_clone_attach(ifc)
758 struct if_clone *ifc;
759{
760 int bytoff, bitoff;
761 int err;
762 int len, maxclone;
763 int unit;
764
765 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
766 ("%s: %s requested more units then allowed (%d > %d)",
767 __func__, ifc->ifc_name, ifc->ifc_minifs,
768 ifc->ifc_maxunit + 1));
769 /*
770 * Compute bitmap size and allocate it.
771 */
772 maxclone = ifc->ifc_maxunit + 1;
773 len = maxclone >> 3;
774 if ((len << 3) < maxclone)
775 len++;
776 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
777 ifc->ifc_bmlen = len;
778
779 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
780 if_cloners_count++;
781
782 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
783 err = (*ifc->ifc_create)(ifc, unit);
784 KASSERT(err == 0,
785 ("%s: failed to create required interface %s%d",
786 __func__, ifc->ifc_name, unit));
787
788 /* Allocate the unit in the bitmap. */
789 bytoff = unit >> 3;
790 bitoff = unit - (bytoff << 3);
791 ifc->ifc_units[bytoff] |= (1 << bitoff);
792 }
793}
794
795/*
796 * Unregister a network interface cloner.
797 */
798void
799if_clone_detach(ifc)
800 struct if_clone *ifc;
801{
802
803 LIST_REMOVE(ifc, ifc_list);
804 free(ifc->ifc_units, M_CLONE);
805 if_cloners_count--;
806}
807
808/*
809 * Provide list of interface cloners to userspace.
810 */
811static int
812if_clone_list(ifcr)
813 struct if_clonereq *ifcr;
814{
815 char outbuf[IFNAMSIZ], *dst;
816 struct if_clone *ifc;
817 int count, error = 0;
818
819 ifcr->ifcr_total = if_cloners_count;
820 if ((dst = ifcr->ifcr_buffer) == NULL) {
821 /* Just asking how many there are. */
822 return (0);
823 }
824
825 if (ifcr->ifcr_count < 0)
826 return (EINVAL);
827
828 count = (if_cloners_count < ifcr->ifcr_count) ?
829 if_cloners_count : ifcr->ifcr_count;
830
831 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
832 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
833 strncpy(outbuf, ifc->ifc_name, IFNAMSIZ);
834 outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */
835 error = copyout(outbuf, dst, IFNAMSIZ);
836 if (error)
837 break;
838 }
839
840 return (error);
841}
842
843#define equal(a1, a2) \
844 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
845
846/*
847 * Locate an interface based on a complete address.
848 */
849/*ARGSUSED*/
850struct ifaddr *
851ifa_ifwithaddr(addr)
852 struct sockaddr *addr;
853{
854 struct ifnet *ifp;
855 struct ifaddr *ifa;
856
857 IFNET_RLOCK();
858 TAILQ_FOREACH(ifp, &ifnet, if_link)
859 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
860 if (ifa->ifa_addr->sa_family != addr->sa_family)
861 continue;
862 if (equal(addr, ifa->ifa_addr))
863 goto done;
864 /* IP6 doesn't have broadcast */
865 if ((ifp->if_flags & IFF_BROADCAST) &&
866 ifa->ifa_broadaddr &&
867 ifa->ifa_broadaddr->sa_len != 0 &&
868 equal(ifa->ifa_broadaddr, addr))
869 goto done;
870 }
871 ifa = NULL;
872done:
873 IFNET_RUNLOCK();
874 return (ifa);
875}
876
877/*
878 * Locate the point to point interface with a given destination address.
879 */
880/*ARGSUSED*/
881struct ifaddr *
882ifa_ifwithdstaddr(addr)
883 struct sockaddr *addr;
884{
885 struct ifnet *ifp;
886 struct ifaddr *ifa;
887
888 IFNET_RLOCK();
889 TAILQ_FOREACH(ifp, &ifnet, if_link) {
890 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
891 continue;
892 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
893 if (ifa->ifa_addr->sa_family != addr->sa_family)
894 continue;
895 if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
896 goto done;
897 }
898 }
899 ifa = NULL;
900done:
901 IFNET_RUNLOCK();
902 return (ifa);
903}
904
905/*
906 * Find an interface on a specific network. If many, choice
907 * is most specific found.
908 */
909struct ifaddr *
910ifa_ifwithnet(addr)
911 struct sockaddr *addr;
912{
913 register struct ifnet *ifp;
914 register struct ifaddr *ifa;
915 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
916 u_int af = addr->sa_family;
917 char *addr_data = addr->sa_data, *cplim;
918
919 /*
920 * AF_LINK addresses can be looked up directly by their index number,
921 * so do that if we can.
922 */
923 if (af == AF_LINK) {
924 register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
925 if (sdl->sdl_index && sdl->sdl_index <= if_index)
926 return (ifaddr_byindex(sdl->sdl_index));
927 }
928
929 /*
930 * Scan though each interface, looking for ones that have
931 * addresses in this address family.
932 */
933 IFNET_RLOCK();
934 TAILQ_FOREACH(ifp, &ifnet, if_link) {
935 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
936 register char *cp, *cp2, *cp3;
937
938 if (ifa->ifa_addr->sa_family != af)
939next: continue;
940 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
941 /*
942 * This is a bit broken as it doesn't
943 * take into account that the remote end may
944 * be a single node in the network we are
945 * looking for.
946 * The trouble is that we don't know the
947 * netmask for the remote end.
948 */
949 if (ifa->ifa_dstaddr != 0
950 && equal(addr, ifa->ifa_dstaddr))
951 goto done;
952 } else {
953 /*
954 * if we have a special address handler,
955 * then use it instead of the generic one.
956 */
957 if (ifa->ifa_claim_addr) {
958 if ((*ifa->ifa_claim_addr)(ifa, addr))
959 goto done;
960 continue;
961 }
962
963 /*
964 * Scan all the bits in the ifa's address.
965 * If a bit dissagrees with what we are
966 * looking for, mask it with the netmask
967 * to see if it really matters.
968 * (A byte at a time)
969 */
970 if (ifa->ifa_netmask == 0)
971 continue;
972 cp = addr_data;
973 cp2 = ifa->ifa_addr->sa_data;
974 cp3 = ifa->ifa_netmask->sa_data;
975 cplim = ifa->ifa_netmask->sa_len
976 + (char *)ifa->ifa_netmask;
977 while (cp3 < cplim)
978 if ((*cp++ ^ *cp2++) & *cp3++)
979 goto next; /* next address! */
980 /*
981 * If the netmask of what we just found
982 * is more specific than what we had before
983 * (if we had one) then remember the new one
984 * before continuing to search
985 * for an even better one.
986 */
987 if (ifa_maybe == 0 ||
988 rn_refines((caddr_t)ifa->ifa_netmask,
989 (caddr_t)ifa_maybe->ifa_netmask))
990 ifa_maybe = ifa;
991 }
992 }
993 }
994 ifa = ifa_maybe;
995done:
996 IFNET_RUNLOCK();
997 return (ifa);
998}
999
1000/*
1001 * Find an interface address specific to an interface best matching
1002 * a given address.
1003 */
1004struct ifaddr *
1005ifaof_ifpforaddr(addr, ifp)
1006 struct sockaddr *addr;
1007 register struct ifnet *ifp;
1008{
1009 register struct ifaddr *ifa;
1010 register char *cp, *cp2, *cp3;
1011 register char *cplim;
1012 struct ifaddr *ifa_maybe = 0;
1013 u_int af = addr->sa_family;
1014
1015 if (af >= AF_MAX)
1016 return (0);
1017 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1018 if (ifa->ifa_addr->sa_family != af)
1019 continue;
1020 if (ifa_maybe == 0)
1021 ifa_maybe = ifa;
1022 if (ifa->ifa_netmask == 0) {
1023 if (equal(addr, ifa->ifa_addr) ||
1024 (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
1025 goto done;
1026 continue;
1027 }
1028 if (ifp->if_flags & IFF_POINTOPOINT) {
1029 if (equal(addr, ifa->ifa_dstaddr))
1030 goto done;
1031 } else {
1032 cp = addr->sa_data;
1033 cp2 = ifa->ifa_addr->sa_data;
1034 cp3 = ifa->ifa_netmask->sa_data;
1035 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1036 for (; cp3 < cplim; cp3++)
1037 if ((*cp++ ^ *cp2++) & *cp3)
1038 break;
1039 if (cp3 == cplim)
1040 goto done;
1041 }
1042 }
1043 ifa = ifa_maybe;
1044done:
1045 return (ifa);
1046}
1047
1048#include <net/route.h>
1049
1050/*
1051 * Default action when installing a route with a Link Level gateway.
1052 * Lookup an appropriate real ifa to point to.
1053 * This should be moved to /sys/net/link.c eventually.
1054 */
1055static void
1056link_rtrequest(cmd, rt, info)
1057 int cmd;
1058 register struct rtentry *rt;
1059 struct rt_addrinfo *info;
1060{
1061 register struct ifaddr *ifa;
1062 struct sockaddr *dst;
1063 struct ifnet *ifp;
1064
1065 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
1066 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
1067 return;
1068 ifa = ifaof_ifpforaddr(dst, ifp);
1069 if (ifa) {
1070 IFAFREE(rt->rt_ifa);
1071 IFAREF(ifa); /* XXX */
1072 rt->rt_ifa = ifa;
1073 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1074 ifa->ifa_rtrequest(cmd, rt, info);
1075 }
1076}
1077
1078/*
1079 * Mark an interface down and notify protocols of
1080 * the transition.
1081 * NOTE: must be called at splnet or eqivalent.
1082 */
1083void
1084if_unroute(ifp, flag, fam)
1085 register struct ifnet *ifp;
1086 int flag, fam;
1087{
1088 register struct ifaddr *ifa;
1089
1090 ifp->if_flags &= ~flag;
1091 getmicrotime(&ifp->if_lastchange);
1092 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1093 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1094 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1095 if_qflush(&ifp->if_snd);
1096 rt_ifmsg(ifp);
1097}
1098
1099/*
1100 * Mark an interface up and notify protocols of
1101 * the transition.
1102 * NOTE: must be called at splnet or eqivalent.
1103 */
1104void
1105if_route(ifp, flag, fam)
1106 register struct ifnet *ifp;
1107 int flag, fam;
1108{
1109 register struct ifaddr *ifa;
1110
1111 ifp->if_flags |= flag;
1112 getmicrotime(&ifp->if_lastchange);
1113 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1114 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1115 pfctlinput(PRC_IFUP, ifa->ifa_addr);
1116 rt_ifmsg(ifp);
1117#ifdef INET6
1118 in6_if_up(ifp);
1119#endif
1120}
1121
1122/*
1123 * Mark an interface down and notify protocols of
1124 * the transition.
1125 * NOTE: must be called at splnet or eqivalent.
1126 */
1127void
1128if_down(ifp)
1129 register struct ifnet *ifp;
1130{
1131
1132 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1133}
1134
1135/*
1136 * Mark an interface up and notify protocols of
1137 * the transition.
1138 * NOTE: must be called at splnet or eqivalent.
1139 */
1140void
1141if_up(ifp)
1142 register struct ifnet *ifp;
1143{
1144
1145 if_route(ifp, IFF_UP, AF_UNSPEC);
1146}
1147
1148/*
1149 * Flush an interface queue.
1150 */
1151static void
1152if_qflush(ifq)
1153 register struct ifqueue *ifq;
1154{
1155 register struct mbuf *m, *n;
1156
1157 n = ifq->ifq_head;
1158 while ((m = n) != 0) {
1159 n = m->m_act;
1160 m_freem(m);
1161 }
1162 ifq->ifq_head = 0;
1163 ifq->ifq_tail = 0;
1164 ifq->ifq_len = 0;
1165}
1166
1167/*
1168 * Handle interface watchdog timer routines. Called
1169 * from softclock, we decrement timers (if set) and
1170 * call the appropriate interface routine on expiration.
1171 */
1172static void
1173if_slowtimo(arg)
1174 void *arg;
1175{
1176 register struct ifnet *ifp;
1177 int s = splimp();
1178
1179 IFNET_RLOCK();
1180 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1181 if (ifp->if_timer == 0 || --ifp->if_timer)
1182 continue;
1183 if (ifp->if_watchdog)
1184 (*ifp->if_watchdog)(ifp);
1185 }
1186 IFNET_RUNLOCK();
1187 splx(s);
1188 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
1189}
1190
1191/*
1192 * Map interface name to
1193 * interface structure pointer.
1194 */
1195struct ifnet *
1196ifunit(const char *name)
1197{
1198 char namebuf[IFNAMSIZ + 1];
1199 struct ifnet *ifp;
1200 dev_t dev;
1201
1202 /*
1203 * Now search all the interfaces for this name/number
1204 */
1205
1206 /*
1207 * XXX
1208 * Devices should really be known as /dev/fooN, not /dev/net/fooN.
1209 */
1210 snprintf(namebuf, IFNAMSIZ, "%s/%s", net_cdevsw.d_name, name);
1211 IFNET_RLOCK();
1212 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1213 dev = ifdev_byindex(ifp->if_index);
1214 if (strcmp(devtoname(dev), namebuf) == 0)
1215 break;
1216 if (dev_named(dev, name))
1217 break;
1218 }
1219 IFNET_RUNLOCK();
1220 return (ifp);
1221}
1222
1223/*
1224 * Map interface name in a sockaddr_dl to
1225 * interface structure pointer.
1226 */
1227struct ifnet *
1228if_withname(sa)
1229 struct sockaddr *sa;
1230{
1231 char ifname[IFNAMSIZ+1];
1232 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1233
1234 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1235 (sdl->sdl_nlen > IFNAMSIZ) )
1236 return NULL;
1237
1238 /*
1239 * ifunit wants a NUL-terminated string. It may not be NUL-terminated
1240 * in the sockaddr, and we don't want to change the caller's sockaddr
1241 * (there might not be room to add the trailing NUL anyway), so we make
1242 * a local copy that we know we can NUL-terminate safely.
1243 */
1244
1245 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1246 ifname[sdl->sdl_nlen] = '\0';
1247 return ifunit(ifname);
1248}
1249
1250/*
1251 * Hardware specific interface ioctls.
1252 */
1253static int
1254ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
1255{
1256 struct ifreq *ifr;
1257 struct ifstat *ifs;
1258 int error = 0;
1259 int new_flags;
1260
1261 ifr = (struct ifreq *)data;
1262 switch (cmd) {
1263 case SIOCGIFINDEX:
1264 ifr->ifr_index = ifp->if_index;
1265 break;
1266
1267 case SIOCGIFFLAGS:
1268 ifr->ifr_flags = ifp->if_flags & 0xffff;
1269 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1270 break;
1271
1272 case SIOCGIFCAP:
1273 ifr->ifr_reqcap = ifp->if_capabilities;
1274 ifr->ifr_curcap = ifp->if_capenable;
1275 break;
1276
1277#ifdef MAC
1278 case SIOCGIFMAC:
1279 error = mac_ioctl_ifnet_get(td->td_proc->p_ucred, ifr, ifp);
1280 break;
1281#endif
1282
1283 case SIOCGIFMETRIC:
1284 ifr->ifr_metric = ifp->if_metric;
1285 break;
1286
1287 case SIOCGIFMTU:
1288 ifr->ifr_mtu = ifp->if_mtu;
1289 break;
1290
1291 case SIOCGIFPHYS:
1292 ifr->ifr_phys = ifp->if_physical;
1293 break;
1294
1295 case SIOCSIFFLAGS:
1296 error = suser(td);
1297 if (error)
1298 return (error);
1299 new_flags = (ifr->ifr_flags & 0xffff) |
1300 (ifr->ifr_flagshigh << 16);
1301 if (ifp->if_flags & IFF_SMART) {
1302 /* Smart drivers twiddle their own routes */
1303 } else if (ifp->if_flags & IFF_UP &&
1304 (new_flags & IFF_UP) == 0) {
1305 int s = splimp();
1306 if_down(ifp);
1307 splx(s);
1308 } else if (new_flags & IFF_UP &&
1309 (ifp->if_flags & IFF_UP) == 0) {
1310 int s = splimp();
1311 if_up(ifp);
1312 splx(s);
1313 }
1314 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1315 (new_flags &~ IFF_CANTCHANGE);
1316 if (new_flags & IFF_PPROMISC) {
1317 /* Permanently promiscuous mode requested */
1318 ifp->if_flags |= IFF_PROMISC;
1319 } else if (ifp->if_pcount == 0) {
1320 ifp->if_flags &= ~IFF_PROMISC;
1321 }
1322 if (ifp->if_ioctl)
1323 (void) (*ifp->if_ioctl)(ifp, cmd, data);
1324 getmicrotime(&ifp->if_lastchange);
1325 break;
1326
1327 case SIOCSIFCAP:
1328 error = suser(td);
1329 if (error)
1330 return (error);
1331 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1332 return (EINVAL);
1333 (void) (*ifp->if_ioctl)(ifp, cmd, data);
1334 break;
1335
1336#ifdef MAC
1337 case SIOCSIFMAC:
1338 error = mac_ioctl_ifnet_set(td->td_proc->p_ucred, ifr, ifp);
1339 break;
1340#endif
1341
1342 case SIOCSIFMETRIC:
1343 error = suser(td);
1344 if (error)
1345 return (error);
1346 ifp->if_metric = ifr->ifr_metric;
1347 getmicrotime(&ifp->if_lastchange);
1348 break;
1349
1350 case SIOCSIFPHYS:
1351 error = suser(td);
1352 if (error)
1353 return error;
1354 if (!ifp->if_ioctl)
1355 return EOPNOTSUPP;
1356 error = (*ifp->if_ioctl)(ifp, cmd, data);
1357 if (error == 0)
1358 getmicrotime(&ifp->if_lastchange);
1359 return(error);
1360
1361 case SIOCSIFMTU:
1362 {
1363 u_long oldmtu = ifp->if_mtu;
1364
1365 error = suser(td);
1366 if (error)
1367 return (error);
1368 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1369 return (EINVAL);
1370 if (ifp->if_ioctl == NULL)
1371 return (EOPNOTSUPP);
1372 error = (*ifp->if_ioctl)(ifp, cmd, data);
1373 if (error == 0) {
1374 getmicrotime(&ifp->if_lastchange);
1375 rt_ifmsg(ifp);
1376 }
1377 /*
1378 * If the link MTU changed, do network layer specific procedure.
1379 */
1380 if (ifp->if_mtu != oldmtu) {
1381#ifdef INET6
1382 nd6_setmtu(ifp);
1383#endif
1384 }
1385 break;
1386 }
1387
1388 case SIOCADDMULTI:
1389 case SIOCDELMULTI:
1390 error = suser(td);
1391 if (error)
1392 return (error);
1393
1394 /* Don't allow group membership on non-multicast interfaces. */
1395 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1396 return (EOPNOTSUPP);
1397
1398 /* Don't let users screw up protocols' entries. */
1399 if (ifr->ifr_addr.sa_family != AF_LINK)
1400 return (EINVAL);
1401
1402 if (cmd == SIOCADDMULTI) {
1403 struct ifmultiaddr *ifma;
1404 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1405 } else {
1406 error = if_delmulti(ifp, &ifr->ifr_addr);
1407 }
1408 if (error == 0)
1409 getmicrotime(&ifp->if_lastchange);
1410 break;
1411
1412 case SIOCSIFPHYADDR:
1413 case SIOCDIFPHYADDR:
1414#ifdef INET6
1415 case SIOCSIFPHYADDR_IN6:
1416#endif
1417 case SIOCSLIFPHYADDR:
1418 case SIOCSIFMEDIA:
1419 case SIOCSIFGENERIC:
1420 error = suser(td);
1421 if (error)
1422 return (error);
1423 if (ifp->if_ioctl == NULL)
1424 return (EOPNOTSUPP);
1425 error = (*ifp->if_ioctl)(ifp, cmd, data);
1426 if (error == 0)
1427 getmicrotime(&ifp->if_lastchange);
1428 break;
1429
1430 case SIOCGIFSTATUS:
1431 ifs = (struct ifstat *)data;
1432 ifs->ascii[0] = '\0';
1433
1434 case SIOCGIFPSRCADDR:
1435 case SIOCGIFPDSTADDR:
1436 case SIOCGLIFPHYADDR:
1437 case SIOCGIFMEDIA:
1438 case SIOCGIFGENERIC:
1439 if (ifp->if_ioctl == 0)
1440 return (EOPNOTSUPP);
1441 error = (*ifp->if_ioctl)(ifp, cmd, data);
1442 break;
1443
1444 case SIOCSIFLLADDR:
1445 error = suser(td);
1446 if (error)
1447 return (error);
1448 error = if_setlladdr(ifp,
1449 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1450 break;
1451
1452 default:
1453 error = ENOIOCTL;
1454 break;
1455 }
1456 return (error);
1457}
1458
1459/*
1460 * Interface ioctls.
1461 */
1462int
1463ifioctl(so, cmd, data, td)
1464 struct socket *so;
1465 u_long cmd;
1466 caddr_t data;
1467 struct thread *td;
1468{
1469 struct ifnet *ifp;
1470 struct ifreq *ifr;
1471 int error;
1472 int oif_flags;
1473
1474 switch (cmd) {
1475 case SIOCGIFCONF:
1476 case OSIOCGIFCONF:
1477 return (ifconf(cmd, data));
1478 }
1479 ifr = (struct ifreq *)data;
1480
1481 switch (cmd) {
1482 case SIOCIFCREATE:
1483 case SIOCIFDESTROY:
1484 if ((error = suser(td)) != 0)
1485 return (error);
1486 return ((cmd == SIOCIFCREATE) ?
1487 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1488 if_clone_destroy(ifr->ifr_name));
1489
1490 case SIOCIFGCLONERS:
1491 return (if_clone_list((struct if_clonereq *)data));
1492 }
1493
1494 ifp = ifunit(ifr->ifr_name);
1495 if (ifp == 0)
1496 return (ENXIO);
1497
1498 error = ifhwioctl(cmd, ifp, data, td);
1499 if (error != ENOIOCTL)
1500 return (error);
1501
1502 oif_flags = ifp->if_flags;
1503 if (so->so_proto == 0)
1504 return (EOPNOTSUPP);
1505#ifndef COMPAT_43
1506 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
1507 data,
1508 ifp, td));
1509#else
1510 {
1511 int ocmd = cmd;
1512
1513 switch (cmd) {
1514
1515 case SIOCSIFDSTADDR:
1516 case SIOCSIFADDR:
1517 case SIOCSIFBRDADDR:
1518 case SIOCSIFNETMASK:
1519#if BYTE_ORDER != BIG_ENDIAN
1520 if (ifr->ifr_addr.sa_family == 0 &&
1521 ifr->ifr_addr.sa_len < 16) {
1522 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1523 ifr->ifr_addr.sa_len = 16;
1524 }
1525#else
1526 if (ifr->ifr_addr.sa_len == 0)
1527 ifr->ifr_addr.sa_len = 16;
1528#endif
1529 break;
1530
1531 case OSIOCGIFADDR:
1532 cmd = SIOCGIFADDR;
1533 break;
1534
1535 case OSIOCGIFDSTADDR:
1536 cmd = SIOCGIFDSTADDR;
1537 break;
1538
1539 case OSIOCGIFBRDADDR:
1540 cmd = SIOCGIFBRDADDR;
1541 break;
1542
1543 case OSIOCGIFNETMASK:
1544 cmd = SIOCGIFNETMASK;
1545 }
1546 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
1547 cmd,
1548 data,
1549 ifp, td));
1550 switch (ocmd) {
1551
1552 case OSIOCGIFADDR:
1553 case OSIOCGIFDSTADDR:
1554 case OSIOCGIFBRDADDR:
1555 case OSIOCGIFNETMASK:
1556 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1557
1558 }
1559 }
1560#endif /* COMPAT_43 */
1561
1562 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1563#ifdef INET6
1564 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1565 if (ifp->if_flags & IFF_UP) {
1566 int s = splimp();
1567 in6_if_up(ifp);
1568 splx(s);
1569 }
1570#endif
1571 }
1572 return (error);
1573}
1574
1575/*
1576 * Set/clear promiscuous mode on interface ifp based on the truth value
1577 * of pswitch. The calls are reference counted so that only the first
1578 * "on" request actually has an effect, as does the final "off" request.
1579 * Results are undefined if the "off" and "on" requests are not matched.
1580 */
1581int
1582ifpromisc(ifp, pswitch)
1583 struct ifnet *ifp;
1584 int pswitch;
1585{
1586 struct ifreq ifr;
1587 int error;
1588 int oldflags, oldpcount;
1589
1590 oldpcount = ifp->if_pcount;
1591 oldflags = ifp->if_flags;
1592 if (ifp->if_flags & IFF_PPROMISC) {
1593 /* Do nothing if device is in permanently promiscuous mode */
1594 ifp->if_pcount += pswitch ? 1 : -1;
1595 return (0);
1596 }
1597 if (pswitch) {
1598 /*
1599 * If the device is not configured up, we cannot put it in
1600 * promiscuous mode.
1601 */
1602 if ((ifp->if_flags & IFF_UP) == 0)
1603 return (ENETDOWN);
1604 if (ifp->if_pcount++ != 0)
1605 return (0);
1606 ifp->if_flags |= IFF_PROMISC;
1607 } else {
1608 if (--ifp->if_pcount > 0)
1609 return (0);
1610 ifp->if_flags &= ~IFF_PROMISC;
1611 }
1612 ifr.ifr_flags = ifp->if_flags & 0xffff;
1613 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1614 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1615 if (error == 0) {
1616 log(LOG_INFO, "%s%d: promiscuous mode %s\n",
1617 ifp->if_name, ifp->if_unit,
1618 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
1619 rt_ifmsg(ifp);
1620 } else {
1621 ifp->if_pcount = oldpcount;
1622 ifp->if_flags = oldflags;
1623 }
1624 return error;
1625}
1626
1627/*
1628 * Return interface configuration
1629 * of system. List may be used
1630 * in later ioctl's (above) to get
1631 * other information.
1632 */
1633/*ARGSUSED*/
1634static int
1635ifconf(cmd, data)
1636 u_long cmd;
1637 caddr_t data;
1638{
1639 struct ifconf *ifc = (struct ifconf *)data;
1640 struct ifnet *ifp;
1641 struct ifaddr *ifa;
1642 struct ifreq ifr, *ifrp;
1643 int space = ifc->ifc_len, error = 0;
1644
1645 ifrp = ifc->ifc_req;
1646 IFNET_RLOCK(); /* could sleep XXX */
1647 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1648 char workbuf[64];
1649 int ifnlen, addrs;
1650
1651 if (space < sizeof(ifr))
1652 break;
1653 ifnlen = snprintf(workbuf, sizeof(workbuf),
1654 "%s%d", ifp->if_name, ifp->if_unit);
1655 if(ifnlen + 1 > sizeof ifr.ifr_name) {
1656 error = ENAMETOOLONG;
1657 break;
1658 } else {
1659 strcpy(ifr.ifr_name, workbuf);
1660 }
1661
1662 addrs = 0;
1663 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1664 struct sockaddr *sa = ifa->ifa_addr;
1665
1666 if (space < sizeof(ifr))
1667 break;
1668 if (jailed(curthread->td_ucred) &&
1669 prison_if(curthread->td_ucred, sa))
1670 continue;
1671 addrs++;
1672#ifdef COMPAT_43
1673 if (cmd == OSIOCGIFCONF) {
1674 struct osockaddr *osa =
1675 (struct osockaddr *)&ifr.ifr_addr;
1676 ifr.ifr_addr = *sa;
1677 osa->sa_family = sa->sa_family;
1678 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1679 sizeof (ifr));
1680 ifrp++;
1681 } else
1682#endif
1683 if (sa->sa_len <= sizeof(*sa)) {
1684 ifr.ifr_addr = *sa;
1685 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1686 sizeof (ifr));
1687 ifrp++;
1688 } else {
1689 if (space < sizeof (ifr) + sa->sa_len -
1690 sizeof(*sa))
1691 break;
1692 space -= sa->sa_len - sizeof(*sa);
1693 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1694 sizeof (ifr.ifr_name));
1695 if (error == 0)
1696 error = copyout((caddr_t)sa,
1697 (caddr_t)&ifrp->ifr_addr, sa->sa_len);
1698 ifrp = (struct ifreq *)
1699 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1700 }
1701 if (error)
1702 break;
1703 space -= sizeof (ifr);
1704 }
1705 if (error)
1706 break;
1707 if (!addrs) {
1708 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
1709 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1710 sizeof (ifr));
1711 if (error)
1712 break;
1713 space -= sizeof (ifr);
1714 ifrp++;
1715 }
1716 }
1717 IFNET_RUNLOCK();
1718 ifc->ifc_len -= space;
1719 return (error);
1720}
1721
1722/*
1723 * Just like if_promisc(), but for all-multicast-reception mode.
1724 */
1725int
1726if_allmulti(ifp, onswitch)
1727 struct ifnet *ifp;
1728 int onswitch;
1729{
1730 int error = 0;
1731 int s = splimp();
1732 struct ifreq ifr;
1733
1734 if (onswitch) {
1735 if (ifp->if_amcount++ == 0) {
1736 ifp->if_flags |= IFF_ALLMULTI;
1737 ifr.ifr_flags = ifp->if_flags & 0xffff;
1738 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1739 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1740 }
1741 } else {
1742 if (ifp->if_amcount > 1) {
1743 ifp->if_amcount--;
1744 } else {
1745 ifp->if_amcount = 0;
1746 ifp->if_flags &= ~IFF_ALLMULTI;
1747 ifr.ifr_flags = ifp->if_flags & 0xffff;;
1748 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1749 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1750 }
1751 }
1752 splx(s);
1753
1754 if (error == 0)
1755 rt_ifmsg(ifp);
1756 return error;
1757}
1758
1759/*
1760 * Add a multicast listenership to the interface in question.
1761 * The link layer provides a routine which converts
1762 */
1763int
1764if_addmulti(ifp, sa, retifma)
1765 struct ifnet *ifp; /* interface to manipulate */
1766 struct sockaddr *sa; /* address to add */
1767 struct ifmultiaddr **retifma;
1768{
1769 struct sockaddr *llsa, *dupsa;
1770 int error, s;
1771 struct ifmultiaddr *ifma;
1772
1773 /*
1774 * If the matching multicast address already exists
1775 * then don't add a new one, just add a reference
1776 */
1777 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1778 if (equal(sa, ifma->ifma_addr)) {
1779 ifma->ifma_refcount++;
1780 if (retifma)
1781 *retifma = ifma;
1782 return 0;
1783 }
1784 }
1785
1786 /*
1787 * Give the link layer a chance to accept/reject it, and also
1788 * find out which AF_LINK address this maps to, if it isn't one
1789 * already.
1790 */
1791 if (ifp->if_resolvemulti) {
1792 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1793 if (error) return error;
1794 } else {
1795 llsa = 0;
1796 }
1797
1798 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1799 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1800 bcopy(sa, dupsa, sa->sa_len);
1801
1802 ifma->ifma_addr = dupsa;
1803 ifma->ifma_lladdr = llsa;
1804 ifma->ifma_ifp = ifp;
1805 ifma->ifma_refcount = 1;
1806 ifma->ifma_protospec = 0;
1807 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1808
1809 /*
1810 * Some network interfaces can scan the address list at
1811 * interrupt time; lock them out.
1812 */
1813 s = splimp();
1814 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1815 splx(s);
1816 if (retifma != NULL)
1817 *retifma = ifma;
1818
1819 if (llsa != 0) {
1820 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1821 if (equal(ifma->ifma_addr, llsa))
1822 break;
1823 }
1824 if (ifma) {
1825 ifma->ifma_refcount++;
1826 } else {
1827 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1828 M_IFMADDR, M_WAITOK);
1829 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1830 M_IFMADDR, M_WAITOK);
1831 bcopy(llsa, dupsa, llsa->sa_len);
1832 ifma->ifma_addr = dupsa;
1833 ifma->ifma_ifp = ifp;
1834 ifma->ifma_refcount = 1;
1835 s = splimp();
1836 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1837 splx(s);
1838 }
1839 }
1840 /*
1841 * We are certain we have added something, so call down to the
1842 * interface to let them know about it.
1843 */
1844 s = splimp();
1845 ifp->if_ioctl(ifp, SIOCADDMULTI, 0);
1846 splx(s);
1847
1848 return 0;
1849}
1850
1851/*
1852 * Remove a reference to a multicast address on this interface. Yell
1853 * if the request does not match an existing membership.
1854 */
1855int
1856if_delmulti(ifp, sa)
1857 struct ifnet *ifp;
1858 struct sockaddr *sa;
1859{
1860 struct ifmultiaddr *ifma;
1861 int s;
1862
1863 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1864 if (equal(sa, ifma->ifma_addr))
1865 break;
1866 if (ifma == 0)
1867 return ENOENT;
1868
1869 if (ifma->ifma_refcount > 1) {
1870 ifma->ifma_refcount--;
1871 return 0;
1872 }
1873
1874 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1875 sa = ifma->ifma_lladdr;
1876 s = splimp();
1877 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1878 /*
1879 * Make sure the interface driver is notified
1880 * in the case of a link layer mcast group being left.
1881 */
1882 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
1883 ifp->if_ioctl(ifp, SIOCDELMULTI, 0);
1884 splx(s);
1885 free(ifma->ifma_addr, M_IFMADDR);
1886 free(ifma, M_IFMADDR);
1887 if (sa == 0)
1888 return 0;
1889
1890 /*
1891 * Now look for the link-layer address which corresponds to
1892 * this network address. It had been squirreled away in
1893 * ifma->ifma_lladdr for this purpose (so we don't have
1894 * to call ifp->if_resolvemulti() again), and we saved that
1895 * value in sa above. If some nasty deleted the
1896 * link-layer address out from underneath us, we can deal because
1897 * the address we stored was is not the same as the one which was
1898 * in the record for the link-layer address. (So we don't complain
1899 * in that case.)
1900 */
1901 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1902 if (equal(sa, ifma->ifma_addr))
1903 break;
1904 if (ifma == 0)
1905 return 0;
1906
1907 if (ifma->ifma_refcount > 1) {
1908 ifma->ifma_refcount--;
1909 return 0;
1910 }
1911
1912 s = splimp();
1913 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1914 ifp->if_ioctl(ifp, SIOCDELMULTI, 0);
1915 splx(s);
1916 free(ifma->ifma_addr, M_IFMADDR);
1917 free(sa, M_IFMADDR);
1918 free(ifma, M_IFMADDR);
1919
1920 return 0;
1921}
1922
1923/*
1924 * Set the link layer address on an interface.
1925 *
1926 * At this time we only support certain types of interfaces,
1927 * and we don't allow the length of the address to change.
1928 */
1929int
1930if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1931{
1932 struct sockaddr_dl *sdl;
1933 struct ifaddr *ifa;
1934 struct ifreq ifr;
1935
1936 ifa = ifaddr_byindex(ifp->if_index);
1937 if (ifa == NULL)
1938 return (EINVAL);
1939 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1940 if (sdl == NULL)
1941 return (EINVAL);
1942 if (len != sdl->sdl_alen) /* don't allow length to change */
1943 return (EINVAL);
1944 switch (ifp->if_type) {
1945 case IFT_ETHER: /* these types use struct arpcom */
1946 case IFT_FDDI:
1947 case IFT_XETHER:
1948 case IFT_ISO88025:
1949 case IFT_L2VLAN:
1950 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1951 /* FALLTHROUGH */
1952 case IFT_ARCNET:
1953 bcopy(lladdr, LLADDR(sdl), len);
1954 break;
1955 default:
1956 return (ENODEV);
1957 }
1958 /*
1959 * If the interface is already up, we need
1960 * to re-init it in order to reprogram its
1961 * address filter.
1962 */
1963 if ((ifp->if_flags & IFF_UP) != 0) {
1964 ifp->if_flags &= ~IFF_UP;
1965 ifr.ifr_flags = ifp->if_flags & 0xffff;
1966 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1967 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1968 ifp->if_flags |= IFF_UP;
1969 ifr.ifr_flags = ifp->if_flags & 0xffff;
1970 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1971 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1972#ifdef INET
1973 /*
1974 * Also send gratuitous ARPs to notify other nodes about
1975 * the address change.
1976 */
1977 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1978 if (ifa->ifa_addr != NULL &&
1979 ifa->ifa_addr->sa_family == AF_INET)
1980 arp_ifinit(ifp, ifa);
1981 }
1982#endif
1983 }
1984 return (0);
1985}
1986
1987struct ifmultiaddr *
1988ifmaof_ifpforaddr(sa, ifp)
1989 struct sockaddr *sa;
1990 struct ifnet *ifp;
1991{
1992 struct ifmultiaddr *ifma;
1993
1994 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1995 if (equal(ifma->ifma_addr, sa))
1996 break;
1997
1998 return ifma;
1999}
2000
2001int
2002if_printf(struct ifnet *ifp, const char * fmt, ...)
2003{
2004 va_list ap;
2005 int retval;
2006
2007 retval = printf("%s%d: ", ifp->if_name, ifp->if_unit);
2008 va_start(ap, fmt);
2009 retval += vprintf(fmt, ap);
2010 va_end(ap);
2011 return (retval);
2012}
2013
2014SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
2015SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
| 141};
142
143static int
144netopen(dev_t dev, int flag, int mode, struct thread *td)
145{
146 return (0);
147}
148
149static int
150netclose(dev_t dev, int flags, int fmt, struct thread *td)
151{
152 return (0);
153}
154
155static int
156netioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct thread *td)
157{
158 struct ifnet *ifp;
159 int error, idx;
160
161 /* only support interface specific ioctls */
162 if (IOCGROUP(cmd) != 'i')
163 return (EOPNOTSUPP);
164 idx = minor(dev);
165 if (idx == 0) {
166 /*
167 * special network device, not interface.
168 */
169 if (cmd == SIOCGIFCONF)
170 return (ifconf(cmd, data)); /* XXX remove cmd */
171 return (EOPNOTSUPP);
172 }
173
174 ifp = ifnet_byindex(idx);
175 if (ifp == NULL)
176 return (ENXIO);
177
178 error = ifhwioctl(cmd, ifp, data, td);
179 if (error == ENOIOCTL)
180 error = EOPNOTSUPP;
181 return (error);
182}
183
184static int
185netkqfilter(dev_t dev, struct knote *kn)
186{
187 struct klist *klist;
188 struct ifnet *ifp;
189 int idx;
190
191 idx = minor(dev);
192 if (idx == 0) {
193 klist = &ifklist;
194 } else {
195 ifp = ifnet_byindex(idx);
196 if (ifp == NULL)
197 return (1);
198 klist = &ifp->if_klist;
199 }
200
201 switch (kn->kn_filter) {
202 case EVFILT_NETDEV:
203 kn->kn_fop = &netdev_filtops;
204 break;
205 default:
206 return (1);
207 }
208
209 kn->kn_hook = (caddr_t)klist;
210
211 /* XXX locking? */
212 SLIST_INSERT_HEAD(klist, kn, kn_selnext);
213
214 return (0);
215}
216
217static void
218filt_netdetach(struct knote *kn)
219{
220 struct klist *klist = (struct klist *)kn->kn_hook;
221
222 if (kn->kn_status & KN_DETACHED)
223 return;
224 SLIST_REMOVE(klist, kn, knote, kn_selnext);
225}
226
227static int
228filt_netdev(struct knote *kn, long hint)
229{
230
231 /*
232 * Currently NOTE_EXIT is abused to indicate device detach.
233 */
234 if (hint == NOTE_EXIT) {
235 kn->kn_data = NOTE_LINKINV;
236 kn->kn_status |= KN_DETACHED;
237 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
238 return (1);
239 }
240 kn->kn_data = hint; /* current status */
241 if (kn->kn_sfflags & hint)
242 kn->kn_fflags |= hint;
243 return (kn->kn_fflags != 0);
244}
245
246/*
247 * Network interface utility routines.
248 *
249 * Routines with ifa_ifwith* names take sockaddr *'s as
250 * parameters.
251 */
252/* ARGSUSED*/
253static void
254if_init(dummy)
255 void *dummy;
256{
257
258 IFNET_LOCK_INIT();
259 TAILQ_INIT(&ifnet);
260 SLIST_INIT(&ifklist);
261 if_grow(); /* create initial table */
262 ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
263 UID_ROOT, GID_WHEEL, 0600, "network");
264}
265
266static void
267if_grow(void)
268{
269 u_int n;
270 struct ifindex_entry *e;
271
272 if_indexlim <<= 1;
273 n = if_indexlim * sizeof(*e);
274 e = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
275 if (ifindex_table != NULL) {
276 memcpy((caddr_t)e, (caddr_t)ifindex_table, n/2);
277 free((caddr_t)ifindex_table, M_IFADDR);
278 }
279 ifindex_table = e;
280}
281
282/* ARGSUSED*/
283static void
284if_check(dummy)
285 void *dummy;
286{
287 struct ifnet *ifp;
288 int s;
289
290 s = splimp();
291 IFNET_RLOCK(); /* could sleep on rare error; mostly okay XXX */
292 TAILQ_FOREACH(ifp, &ifnet, if_link) {
293 if (ifp->if_snd.ifq_maxlen == 0) {
294 printf("%s%d XXX: driver didn't set ifq_maxlen\n",
295 ifp->if_name, ifp->if_unit);
296 ifp->if_snd.ifq_maxlen = ifqmaxlen;
297 }
298 if (!mtx_initialized(&ifp->if_snd.ifq_mtx)) {
299 printf("%s%d XXX: driver didn't initialize queue mtx\n",
300 ifp->if_name, ifp->if_unit);
301 mtx_init(&ifp->if_snd.ifq_mtx, "unknown",
302 MTX_NETWORK_LOCK, MTX_DEF);
303 }
304 }
305 IFNET_RUNLOCK();
306 splx(s);
307 if_slowtimo(0);
308}
309
310static int
311if_findindex(struct ifnet *ifp)
312{
313 int i, unit;
314 char eaddr[18], devname[32];
315 const char *name, *p;
316
317 switch (ifp->if_type) {
318 case IFT_ETHER: /* these types use struct arpcom */
319 case IFT_FDDI:
320 case IFT_XETHER:
321 case IFT_ISO88025:
322 case IFT_L2VLAN:
323 snprintf(eaddr, 18, "%6D",
324 ((struct arpcom *)ifp->if_softc)->ac_enaddr, ":");
325 break;
326 default:
327 eaddr[0] = '\0';
328 break;
329 }
330 snprintf(devname, 32, "%s%d", ifp->if_name, ifp->if_unit);
331 name = net_cdevsw.d_name;
332 i = 0;
333 while ((resource_find_dev(&i, name, &unit, NULL, NULL)) == 0) {
334 if (resource_string_value(name, unit, "ether", &p) == 0)
335 if (strcmp(p, eaddr) == 0)
336 goto found;
337 if (resource_string_value(name, unit, "dev", &p) == 0)
338 if (strcmp(p, devname) == 0)
339 goto found;
340 }
341 unit = 0;
342found:
343 if (unit != 0) {
344 if (ifaddr_byindex(unit) == NULL)
345 return (unit);
346 printf("%s%d in use, cannot hardwire it to %s.\n",
347 name, unit, devname);
348 }
349 for (unit = 1; ; unit++) {
350 if (unit <= if_index && ifaddr_byindex(unit) != NULL)
351 continue;
352 if (resource_string_value(name, unit, "ether", &p) == 0 ||
353 resource_string_value(name, unit, "dev", &p) == 0)
354 continue;
355 break;
356 }
357 return (unit);
358}
359
360/*
361 * Attach an interface to the
362 * list of "active" interfaces.
363 */
364void
365if_attach(ifp)
366 struct ifnet *ifp;
367{
368 unsigned socksize, ifasize;
369 int namelen, masklen;
370 char workbuf[64];
371 register struct sockaddr_dl *sdl;
372 register struct ifaddr *ifa;
373
374 IFNET_WLOCK();
375 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
376 IFNET_WUNLOCK();
377 /*
378 * XXX -
379 * The old code would work if the interface passed a pre-existing
380 * chain of ifaddrs to this code. We don't trust our callers to
381 * properly initialize the tailq, however, so we no longer allow
382 * this unlikely case.
383 */
384 TAILQ_INIT(&ifp->if_addrhead);
385 TAILQ_INIT(&ifp->if_prefixhead);
386 TAILQ_INIT(&ifp->if_multiaddrs);
387 SLIST_INIT(&ifp->if_klist);
388 getmicrotime(&ifp->if_lastchange);
389
390#ifdef MAC
391 mac_init_ifnet(ifp);
392 mac_create_ifnet(ifp);
393#endif
394
395 ifp->if_index = if_findindex(ifp);
396 if (ifp->if_index > if_index)
397 if_index = ifp->if_index;
398 if (if_index >= if_indexlim)
399 if_grow();
400
401 ifnet_byindex(ifp->if_index) = ifp;
402 ifdev_byindex(ifp->if_index) = make_dev(&net_cdevsw, ifp->if_index,
403 UID_ROOT, GID_WHEEL, 0600, "%s/%s%d",
404 net_cdevsw.d_name, ifp->if_name, ifp->if_unit);
405 make_dev_alias(ifdev_byindex(ifp->if_index), "%s%d",
406 net_cdevsw.d_name, ifp->if_index);
407
408 mtx_init(&ifp->if_snd.ifq_mtx, ifp->if_name, "if send queue", MTX_DEF);
409
410 /*
411 * create a Link Level name for this device
412 */
413 namelen = snprintf(workbuf, sizeof(workbuf),
414 "%s%d", ifp->if_name, ifp->if_unit);
415#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
416 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
417 socksize = masklen + ifp->if_addrlen;
418#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
419 if (socksize < sizeof(*sdl))
420 socksize = sizeof(*sdl);
421 socksize = ROUNDUP(socksize);
422 ifasize = sizeof(*ifa) + 2 * socksize;
423 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
424 if (ifa) {
425 IFA_LOCK_INIT(ifa);
426 sdl = (struct sockaddr_dl *)(ifa + 1);
427 sdl->sdl_len = socksize;
428 sdl->sdl_family = AF_LINK;
429 bcopy(workbuf, sdl->sdl_data, namelen);
430 sdl->sdl_nlen = namelen;
431 sdl->sdl_index = ifp->if_index;
432 sdl->sdl_type = ifp->if_type;
433 ifaddr_byindex(ifp->if_index) = ifa;
434 ifa->ifa_ifp = ifp;
435 ifa->ifa_rtrequest = link_rtrequest;
436 ifa->ifa_addr = (struct sockaddr *)sdl;
437 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
438 ifa->ifa_netmask = (struct sockaddr *)sdl;
439 sdl->sdl_len = masklen;
440 while (namelen != 0)
441 sdl->sdl_data[--namelen] = 0xff;
442 ifa->ifa_refcnt = 1;
443 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
444 }
445 ifp->if_broadcastaddr = 0; /* reliably crash if used uninitialized */
446
447 /* Announce the interface. */
448 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
449}
450
451/*
452 * Detach an interface, removing it from the
453 * list of "active" interfaces.
454 */
455void
456if_detach(ifp)
457 struct ifnet *ifp;
458{
459 struct ifaddr *ifa;
460 struct radix_node_head *rnh;
461 int s;
462 int i;
463
464 /*
465 * Remove routes and flush queues.
466 */
467 s = splnet();
468 if_down(ifp);
469
470 /*
471 * Remove address from ifindex_table[] and maybe decrement if_index.
472 * Clean up all addresses.
473 */
474 ifaddr_byindex(ifp->if_index) = NULL;
475 revoke_and_destroy_dev(ifdev_byindex(ifp->if_index));
476 ifdev_byindex(ifp->if_index) = NULL;
477
478 while (if_index > 0 && ifaddr_byindex(if_index) == NULL)
479 if_index--;
480
481 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
482 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
483#ifdef INET
484 /* XXX: Ugly!! ad hoc just for INET */
485 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
486 struct ifaliasreq ifr;
487
488 bzero(&ifr, sizeof(ifr));
489 ifr.ifra_addr = *ifa->ifa_addr;
490 if (ifa->ifa_dstaddr)
491 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
492 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
493 NULL) == 0)
494 continue;
495 }
496#endif /* INET */
497#ifdef INET6
498 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
499 in6_purgeaddr(ifa);
500 /* ifp_addrhead is already updated */
501 continue;
502 }
503#endif /* INET6 */
504 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
505 IFAFREE(ifa);
506 }
507
508#ifdef INET6
509 /*
510 * Remove all IPv6 kernel structs related to ifp. This should be done
511 * before removing routing entries below, since IPv6 interface direct
512 * routes are expected to be removed by the IPv6-specific kernel API.
513 * Otherwise, the kernel will detect some inconsistency and bark it.
514 */
515 in6_ifdetach(ifp);
516#endif
517
518 /*
519 * Delete all remaining routes using this interface
520 * Unfortuneatly the only way to do this is to slog through
521 * the entire routing table looking for routes which point
522 * to this interface...oh well...
523 */
524 for (i = 1; i <= AF_MAX; i++) {
525 if ((rnh = rt_tables[i]) == NULL)
526 continue;
527 RADIX_NODE_HEAD_LOCK(rnh);
528 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
529 RADIX_NODE_HEAD_UNLOCK(rnh);
530 }
531
532 /* Announce that the interface is gone. */
533 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
534
535#ifdef MAC
536 mac_destroy_ifnet(ifp);
537#endif /* MAC */
538 KNOTE(&ifp->if_klist, NOTE_EXIT);
539 IFNET_WLOCK();
540 TAILQ_REMOVE(&ifnet, ifp, if_link);
541 IFNET_WUNLOCK();
542 mtx_destroy(&ifp->if_snd.ifq_mtx);
543 splx(s);
544}
545
546/*
547 * Delete Routes for a Network Interface
548 *
549 * Called for each routing entry via the rnh->rnh_walktree() call above
550 * to delete all route entries referencing a detaching network interface.
551 *
552 * Arguments:
553 * rn pointer to node in the routing table
554 * arg argument passed to rnh->rnh_walktree() - detaching interface
555 *
556 * Returns:
557 * 0 successful
558 * errno failed - reason indicated
559 *
560 */
561static int
562if_rtdel(rn, arg)
563 struct radix_node *rn;
564 void *arg;
565{
566 struct rtentry *rt = (struct rtentry *)rn;
567 struct ifnet *ifp = arg;
568 int err;
569
570 if (rt->rt_ifp == ifp) {
571
572 /*
573 * Protect (sorta) against walktree recursion problems
574 * with cloned routes
575 */
576 if ((rt->rt_flags & RTF_UP) == 0)
577 return (0);
578
579 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
580 rt_mask(rt), rt->rt_flags,
581 (struct rtentry **) NULL);
582 if (err) {
583 log(LOG_WARNING, "if_rtdel: error %d\n", err);
584 }
585 }
586
587 return (0);
588}
589
590/*
591 * Create a clone network interface.
592 */
593int
594if_clone_create(name, len)
595 char *name;
596 int len;
597{
598 struct if_clone *ifc;
599 char *dp;
600 int wildcard, bytoff, bitoff;
601 int unit;
602 int err;
603
604 ifc = if_clone_lookup(name, &unit);
605 if (ifc == NULL)
606 return (EINVAL);
607
608 if (ifunit(name) != NULL)
609 return (EEXIST);
610
611 bytoff = bitoff = 0;
612 wildcard = (unit < 0);
613 /*
614 * Find a free unit if none was given.
615 */
616 if (wildcard) {
617 while ((bytoff < ifc->ifc_bmlen)
618 && (ifc->ifc_units[bytoff] == 0xff))
619 bytoff++;
620 if (bytoff >= ifc->ifc_bmlen)
621 return (ENOSPC);
622 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
623 bitoff++;
624 unit = (bytoff << 3) + bitoff;
625 }
626
627 if (unit > ifc->ifc_maxunit)
628 return (ENXIO);
629
630 err = (*ifc->ifc_create)(ifc, unit);
631 if (err != 0)
632 return (err);
633
634 if (!wildcard) {
635 bytoff = unit >> 3;
636 bitoff = unit - (bytoff << 3);
637 }
638
639 /*
640 * Allocate the unit in the bitmap.
641 */
642 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
643 ("%s: bit is already set", __func__));
644 ifc->ifc_units[bytoff] |= (1 << bitoff);
645
646 /* In the wildcard case, we need to update the name. */
647 if (wildcard) {
648 for (dp = name; *dp != '\0'; dp++);
649 if (snprintf(dp, len - (dp-name), "%d", unit) >
650 len - (dp-name) - 1) {
651 /*
652 * This can only be a programmer error and
653 * there's no straightforward way to recover if
654 * it happens.
655 */
656 panic("if_clone_create(): interface name too long");
657 }
658
659 }
660
661 return (0);
662}
663
664/*
665 * Destroy a clone network interface.
666 */
667int
668if_clone_destroy(name)
669 const char *name;
670{
671 struct if_clone *ifc;
672 struct ifnet *ifp;
673 int bytoff, bitoff;
674 int unit;
675
676 ifc = if_clone_lookup(name, &unit);
677 if (ifc == NULL)
678 return (EINVAL);
679
680 if (unit < ifc->ifc_minifs)
681 return (EINVAL);
682
683 ifp = ifunit(name);
684 if (ifp == NULL)
685 return (ENXIO);
686
687 if (ifc->ifc_destroy == NULL)
688 return (EOPNOTSUPP);
689
690 (*ifc->ifc_destroy)(ifp);
691
692 /*
693 * Compute offset in the bitmap and deallocate the unit.
694 */
695 bytoff = unit >> 3;
696 bitoff = unit - (bytoff << 3);
697 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
698 ("%s: bit is already cleared", __func__));
699 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
700 return (0);
701}
702
703/*
704 * Look up a network interface cloner.
705 */
706static struct if_clone *
707if_clone_lookup(name, unitp)
708 const char *name;
709 int *unitp;
710{
711 struct if_clone *ifc;
712 const char *cp;
713 int i;
714
715 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
716 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
717 if (ifc->ifc_name[i] != *cp)
718 goto next_ifc;
719 }
720 goto found_name;
721 next_ifc:
722 ifc = LIST_NEXT(ifc, ifc_list);
723 }
724
725 /* No match. */
726 return ((struct if_clone *)NULL);
727
728 found_name:
729 if (*cp == '\0') {
730 i = -1;
731 } else {
732 for (i = 0; *cp != '\0'; cp++) {
733 if (*cp < '0' || *cp > '9') {
734 /* Bogus unit number. */
735 return (NULL);
736 }
737 i = (i * 10) + (*cp - '0');
738 }
739 }
740
741 if (unitp != NULL)
742 *unitp = i;
743 return (ifc);
744}
745
746/*
747 * Register a network interface cloner.
748 */
749void
750if_clone_attach(ifc)
751 struct if_clone *ifc;
752{
753 int bytoff, bitoff;
754 int err;
755 int len, maxclone;
756 int unit;
757
758 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
759 ("%s: %s requested more units then allowed (%d > %d)",
760 __func__, ifc->ifc_name, ifc->ifc_minifs,
761 ifc->ifc_maxunit + 1));
762 /*
763 * Compute bitmap size and allocate it.
764 */
765 maxclone = ifc->ifc_maxunit + 1;
766 len = maxclone >> 3;
767 if ((len << 3) < maxclone)
768 len++;
769 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
770 ifc->ifc_bmlen = len;
771
772 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
773 if_cloners_count++;
774
775 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
776 err = (*ifc->ifc_create)(ifc, unit);
777 KASSERT(err == 0,
778 ("%s: failed to create required interface %s%d",
779 __func__, ifc->ifc_name, unit));
780
781 /* Allocate the unit in the bitmap. */
782 bytoff = unit >> 3;
783 bitoff = unit - (bytoff << 3);
784 ifc->ifc_units[bytoff] |= (1 << bitoff);
785 }
786}
787
788/*
789 * Unregister a network interface cloner.
790 */
791void
792if_clone_detach(ifc)
793 struct if_clone *ifc;
794{
795
796 LIST_REMOVE(ifc, ifc_list);
797 free(ifc->ifc_units, M_CLONE);
798 if_cloners_count--;
799}
800
801/*
802 * Provide list of interface cloners to userspace.
803 */
804static int
805if_clone_list(ifcr)
806 struct if_clonereq *ifcr;
807{
808 char outbuf[IFNAMSIZ], *dst;
809 struct if_clone *ifc;
810 int count, error = 0;
811
812 ifcr->ifcr_total = if_cloners_count;
813 if ((dst = ifcr->ifcr_buffer) == NULL) {
814 /* Just asking how many there are. */
815 return (0);
816 }
817
818 if (ifcr->ifcr_count < 0)
819 return (EINVAL);
820
821 count = (if_cloners_count < ifcr->ifcr_count) ?
822 if_cloners_count : ifcr->ifcr_count;
823
824 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
825 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
826 strncpy(outbuf, ifc->ifc_name, IFNAMSIZ);
827 outbuf[IFNAMSIZ - 1] = '\0'; /* sanity */
828 error = copyout(outbuf, dst, IFNAMSIZ);
829 if (error)
830 break;
831 }
832
833 return (error);
834}
835
836#define equal(a1, a2) \
837 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
838
839/*
840 * Locate an interface based on a complete address.
841 */
842/*ARGSUSED*/
843struct ifaddr *
844ifa_ifwithaddr(addr)
845 struct sockaddr *addr;
846{
847 struct ifnet *ifp;
848 struct ifaddr *ifa;
849
850 IFNET_RLOCK();
851 TAILQ_FOREACH(ifp, &ifnet, if_link)
852 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
853 if (ifa->ifa_addr->sa_family != addr->sa_family)
854 continue;
855 if (equal(addr, ifa->ifa_addr))
856 goto done;
857 /* IP6 doesn't have broadcast */
858 if ((ifp->if_flags & IFF_BROADCAST) &&
859 ifa->ifa_broadaddr &&
860 ifa->ifa_broadaddr->sa_len != 0 &&
861 equal(ifa->ifa_broadaddr, addr))
862 goto done;
863 }
864 ifa = NULL;
865done:
866 IFNET_RUNLOCK();
867 return (ifa);
868}
869
870/*
871 * Locate the point to point interface with a given destination address.
872 */
873/*ARGSUSED*/
874struct ifaddr *
875ifa_ifwithdstaddr(addr)
876 struct sockaddr *addr;
877{
878 struct ifnet *ifp;
879 struct ifaddr *ifa;
880
881 IFNET_RLOCK();
882 TAILQ_FOREACH(ifp, &ifnet, if_link) {
883 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
884 continue;
885 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
886 if (ifa->ifa_addr->sa_family != addr->sa_family)
887 continue;
888 if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
889 goto done;
890 }
891 }
892 ifa = NULL;
893done:
894 IFNET_RUNLOCK();
895 return (ifa);
896}
897
898/*
899 * Find an interface on a specific network. If many, choice
900 * is most specific found.
901 */
902struct ifaddr *
903ifa_ifwithnet(addr)
904 struct sockaddr *addr;
905{
906 register struct ifnet *ifp;
907 register struct ifaddr *ifa;
908 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
909 u_int af = addr->sa_family;
910 char *addr_data = addr->sa_data, *cplim;
911
912 /*
913 * AF_LINK addresses can be looked up directly by their index number,
914 * so do that if we can.
915 */
916 if (af == AF_LINK) {
917 register struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
918 if (sdl->sdl_index && sdl->sdl_index <= if_index)
919 return (ifaddr_byindex(sdl->sdl_index));
920 }
921
922 /*
923 * Scan though each interface, looking for ones that have
924 * addresses in this address family.
925 */
926 IFNET_RLOCK();
927 TAILQ_FOREACH(ifp, &ifnet, if_link) {
928 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
929 register char *cp, *cp2, *cp3;
930
931 if (ifa->ifa_addr->sa_family != af)
932next: continue;
933 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
934 /*
935 * This is a bit broken as it doesn't
936 * take into account that the remote end may
937 * be a single node in the network we are
938 * looking for.
939 * The trouble is that we don't know the
940 * netmask for the remote end.
941 */
942 if (ifa->ifa_dstaddr != 0
943 && equal(addr, ifa->ifa_dstaddr))
944 goto done;
945 } else {
946 /*
947 * if we have a special address handler,
948 * then use it instead of the generic one.
949 */
950 if (ifa->ifa_claim_addr) {
951 if ((*ifa->ifa_claim_addr)(ifa, addr))
952 goto done;
953 continue;
954 }
955
956 /*
957 * Scan all the bits in the ifa's address.
958 * If a bit dissagrees with what we are
959 * looking for, mask it with the netmask
960 * to see if it really matters.
961 * (A byte at a time)
962 */
963 if (ifa->ifa_netmask == 0)
964 continue;
965 cp = addr_data;
966 cp2 = ifa->ifa_addr->sa_data;
967 cp3 = ifa->ifa_netmask->sa_data;
968 cplim = ifa->ifa_netmask->sa_len
969 + (char *)ifa->ifa_netmask;
970 while (cp3 < cplim)
971 if ((*cp++ ^ *cp2++) & *cp3++)
972 goto next; /* next address! */
973 /*
974 * If the netmask of what we just found
975 * is more specific than what we had before
976 * (if we had one) then remember the new one
977 * before continuing to search
978 * for an even better one.
979 */
980 if (ifa_maybe == 0 ||
981 rn_refines((caddr_t)ifa->ifa_netmask,
982 (caddr_t)ifa_maybe->ifa_netmask))
983 ifa_maybe = ifa;
984 }
985 }
986 }
987 ifa = ifa_maybe;
988done:
989 IFNET_RUNLOCK();
990 return (ifa);
991}
992
993/*
994 * Find an interface address specific to an interface best matching
995 * a given address.
996 */
997struct ifaddr *
998ifaof_ifpforaddr(addr, ifp)
999 struct sockaddr *addr;
1000 register struct ifnet *ifp;
1001{
1002 register struct ifaddr *ifa;
1003 register char *cp, *cp2, *cp3;
1004 register char *cplim;
1005 struct ifaddr *ifa_maybe = 0;
1006 u_int af = addr->sa_family;
1007
1008 if (af >= AF_MAX)
1009 return (0);
1010 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1011 if (ifa->ifa_addr->sa_family != af)
1012 continue;
1013 if (ifa_maybe == 0)
1014 ifa_maybe = ifa;
1015 if (ifa->ifa_netmask == 0) {
1016 if (equal(addr, ifa->ifa_addr) ||
1017 (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
1018 goto done;
1019 continue;
1020 }
1021 if (ifp->if_flags & IFF_POINTOPOINT) {
1022 if (equal(addr, ifa->ifa_dstaddr))
1023 goto done;
1024 } else {
1025 cp = addr->sa_data;
1026 cp2 = ifa->ifa_addr->sa_data;
1027 cp3 = ifa->ifa_netmask->sa_data;
1028 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1029 for (; cp3 < cplim; cp3++)
1030 if ((*cp++ ^ *cp2++) & *cp3)
1031 break;
1032 if (cp3 == cplim)
1033 goto done;
1034 }
1035 }
1036 ifa = ifa_maybe;
1037done:
1038 return (ifa);
1039}
1040
1041#include <net/route.h>
1042
1043/*
1044 * Default action when installing a route with a Link Level gateway.
1045 * Lookup an appropriate real ifa to point to.
1046 * This should be moved to /sys/net/link.c eventually.
1047 */
1048static void
1049link_rtrequest(cmd, rt, info)
1050 int cmd;
1051 register struct rtentry *rt;
1052 struct rt_addrinfo *info;
1053{
1054 register struct ifaddr *ifa;
1055 struct sockaddr *dst;
1056 struct ifnet *ifp;
1057
1058 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
1059 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
1060 return;
1061 ifa = ifaof_ifpforaddr(dst, ifp);
1062 if (ifa) {
1063 IFAFREE(rt->rt_ifa);
1064 IFAREF(ifa); /* XXX */
1065 rt->rt_ifa = ifa;
1066 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1067 ifa->ifa_rtrequest(cmd, rt, info);
1068 }
1069}
1070
1071/*
1072 * Mark an interface down and notify protocols of
1073 * the transition.
1074 * NOTE: must be called at splnet or eqivalent.
1075 */
1076void
1077if_unroute(ifp, flag, fam)
1078 register struct ifnet *ifp;
1079 int flag, fam;
1080{
1081 register struct ifaddr *ifa;
1082
1083 ifp->if_flags &= ~flag;
1084 getmicrotime(&ifp->if_lastchange);
1085 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1086 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1087 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1088 if_qflush(&ifp->if_snd);
1089 rt_ifmsg(ifp);
1090}
1091
1092/*
1093 * Mark an interface up and notify protocols of
1094 * the transition.
1095 * NOTE: must be called at splnet or eqivalent.
1096 */
1097void
1098if_route(ifp, flag, fam)
1099 register struct ifnet *ifp;
1100 int flag, fam;
1101{
1102 register struct ifaddr *ifa;
1103
1104 ifp->if_flags |= flag;
1105 getmicrotime(&ifp->if_lastchange);
1106 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1107 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1108 pfctlinput(PRC_IFUP, ifa->ifa_addr);
1109 rt_ifmsg(ifp);
1110#ifdef INET6
1111 in6_if_up(ifp);
1112#endif
1113}
1114
1115/*
1116 * Mark an interface down and notify protocols of
1117 * the transition.
1118 * NOTE: must be called at splnet or eqivalent.
1119 */
1120void
1121if_down(ifp)
1122 register struct ifnet *ifp;
1123{
1124
1125 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1126}
1127
1128/*
1129 * Mark an interface up and notify protocols of
1130 * the transition.
1131 * NOTE: must be called at splnet or eqivalent.
1132 */
1133void
1134if_up(ifp)
1135 register struct ifnet *ifp;
1136{
1137
1138 if_route(ifp, IFF_UP, AF_UNSPEC);
1139}
1140
1141/*
1142 * Flush an interface queue.
1143 */
1144static void
1145if_qflush(ifq)
1146 register struct ifqueue *ifq;
1147{
1148 register struct mbuf *m, *n;
1149
1150 n = ifq->ifq_head;
1151 while ((m = n) != 0) {
1152 n = m->m_act;
1153 m_freem(m);
1154 }
1155 ifq->ifq_head = 0;
1156 ifq->ifq_tail = 0;
1157 ifq->ifq_len = 0;
1158}
1159
1160/*
1161 * Handle interface watchdog timer routines. Called
1162 * from softclock, we decrement timers (if set) and
1163 * call the appropriate interface routine on expiration.
1164 */
1165static void
1166if_slowtimo(arg)
1167 void *arg;
1168{
1169 register struct ifnet *ifp;
1170 int s = splimp();
1171
1172 IFNET_RLOCK();
1173 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1174 if (ifp->if_timer == 0 || --ifp->if_timer)
1175 continue;
1176 if (ifp->if_watchdog)
1177 (*ifp->if_watchdog)(ifp);
1178 }
1179 IFNET_RUNLOCK();
1180 splx(s);
1181 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
1182}
1183
1184/*
1185 * Map interface name to
1186 * interface structure pointer.
1187 */
1188struct ifnet *
1189ifunit(const char *name)
1190{
1191 char namebuf[IFNAMSIZ + 1];
1192 struct ifnet *ifp;
1193 dev_t dev;
1194
1195 /*
1196 * Now search all the interfaces for this name/number
1197 */
1198
1199 /*
1200 * XXX
1201 * Devices should really be known as /dev/fooN, not /dev/net/fooN.
1202 */
1203 snprintf(namebuf, IFNAMSIZ, "%s/%s", net_cdevsw.d_name, name);
1204 IFNET_RLOCK();
1205 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1206 dev = ifdev_byindex(ifp->if_index);
1207 if (strcmp(devtoname(dev), namebuf) == 0)
1208 break;
1209 if (dev_named(dev, name))
1210 break;
1211 }
1212 IFNET_RUNLOCK();
1213 return (ifp);
1214}
1215
1216/*
1217 * Map interface name in a sockaddr_dl to
1218 * interface structure pointer.
1219 */
1220struct ifnet *
1221if_withname(sa)
1222 struct sockaddr *sa;
1223{
1224 char ifname[IFNAMSIZ+1];
1225 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1226
1227 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1228 (sdl->sdl_nlen > IFNAMSIZ) )
1229 return NULL;
1230
1231 /*
1232 * ifunit wants a NUL-terminated string. It may not be NUL-terminated
1233 * in the sockaddr, and we don't want to change the caller's sockaddr
1234 * (there might not be room to add the trailing NUL anyway), so we make
1235 * a local copy that we know we can NUL-terminate safely.
1236 */
1237
1238 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1239 ifname[sdl->sdl_nlen] = '\0';
1240 return ifunit(ifname);
1241}
1242
1243/*
1244 * Hardware specific interface ioctls.
1245 */
1246static int
1247ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
1248{
1249 struct ifreq *ifr;
1250 struct ifstat *ifs;
1251 int error = 0;
1252 int new_flags;
1253
1254 ifr = (struct ifreq *)data;
1255 switch (cmd) {
1256 case SIOCGIFINDEX:
1257 ifr->ifr_index = ifp->if_index;
1258 break;
1259
1260 case SIOCGIFFLAGS:
1261 ifr->ifr_flags = ifp->if_flags & 0xffff;
1262 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1263 break;
1264
1265 case SIOCGIFCAP:
1266 ifr->ifr_reqcap = ifp->if_capabilities;
1267 ifr->ifr_curcap = ifp->if_capenable;
1268 break;
1269
1270#ifdef MAC
1271 case SIOCGIFMAC:
1272 error = mac_ioctl_ifnet_get(td->td_proc->p_ucred, ifr, ifp);
1273 break;
1274#endif
1275
1276 case SIOCGIFMETRIC:
1277 ifr->ifr_metric = ifp->if_metric;
1278 break;
1279
1280 case SIOCGIFMTU:
1281 ifr->ifr_mtu = ifp->if_mtu;
1282 break;
1283
1284 case SIOCGIFPHYS:
1285 ifr->ifr_phys = ifp->if_physical;
1286 break;
1287
1288 case SIOCSIFFLAGS:
1289 error = suser(td);
1290 if (error)
1291 return (error);
1292 new_flags = (ifr->ifr_flags & 0xffff) |
1293 (ifr->ifr_flagshigh << 16);
1294 if (ifp->if_flags & IFF_SMART) {
1295 /* Smart drivers twiddle their own routes */
1296 } else if (ifp->if_flags & IFF_UP &&
1297 (new_flags & IFF_UP) == 0) {
1298 int s = splimp();
1299 if_down(ifp);
1300 splx(s);
1301 } else if (new_flags & IFF_UP &&
1302 (ifp->if_flags & IFF_UP) == 0) {
1303 int s = splimp();
1304 if_up(ifp);
1305 splx(s);
1306 }
1307 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1308 (new_flags &~ IFF_CANTCHANGE);
1309 if (new_flags & IFF_PPROMISC) {
1310 /* Permanently promiscuous mode requested */
1311 ifp->if_flags |= IFF_PROMISC;
1312 } else if (ifp->if_pcount == 0) {
1313 ifp->if_flags &= ~IFF_PROMISC;
1314 }
1315 if (ifp->if_ioctl)
1316 (void) (*ifp->if_ioctl)(ifp, cmd, data);
1317 getmicrotime(&ifp->if_lastchange);
1318 break;
1319
1320 case SIOCSIFCAP:
1321 error = suser(td);
1322 if (error)
1323 return (error);
1324 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1325 return (EINVAL);
1326 (void) (*ifp->if_ioctl)(ifp, cmd, data);
1327 break;
1328
1329#ifdef MAC
1330 case SIOCSIFMAC:
1331 error = mac_ioctl_ifnet_set(td->td_proc->p_ucred, ifr, ifp);
1332 break;
1333#endif
1334
1335 case SIOCSIFMETRIC:
1336 error = suser(td);
1337 if (error)
1338 return (error);
1339 ifp->if_metric = ifr->ifr_metric;
1340 getmicrotime(&ifp->if_lastchange);
1341 break;
1342
1343 case SIOCSIFPHYS:
1344 error = suser(td);
1345 if (error)
1346 return error;
1347 if (!ifp->if_ioctl)
1348 return EOPNOTSUPP;
1349 error = (*ifp->if_ioctl)(ifp, cmd, data);
1350 if (error == 0)
1351 getmicrotime(&ifp->if_lastchange);
1352 return(error);
1353
1354 case SIOCSIFMTU:
1355 {
1356 u_long oldmtu = ifp->if_mtu;
1357
1358 error = suser(td);
1359 if (error)
1360 return (error);
1361 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1362 return (EINVAL);
1363 if (ifp->if_ioctl == NULL)
1364 return (EOPNOTSUPP);
1365 error = (*ifp->if_ioctl)(ifp, cmd, data);
1366 if (error == 0) {
1367 getmicrotime(&ifp->if_lastchange);
1368 rt_ifmsg(ifp);
1369 }
1370 /*
1371 * If the link MTU changed, do network layer specific procedure.
1372 */
1373 if (ifp->if_mtu != oldmtu) {
1374#ifdef INET6
1375 nd6_setmtu(ifp);
1376#endif
1377 }
1378 break;
1379 }
1380
1381 case SIOCADDMULTI:
1382 case SIOCDELMULTI:
1383 error = suser(td);
1384 if (error)
1385 return (error);
1386
1387 /* Don't allow group membership on non-multicast interfaces. */
1388 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1389 return (EOPNOTSUPP);
1390
1391 /* Don't let users screw up protocols' entries. */
1392 if (ifr->ifr_addr.sa_family != AF_LINK)
1393 return (EINVAL);
1394
1395 if (cmd == SIOCADDMULTI) {
1396 struct ifmultiaddr *ifma;
1397 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1398 } else {
1399 error = if_delmulti(ifp, &ifr->ifr_addr);
1400 }
1401 if (error == 0)
1402 getmicrotime(&ifp->if_lastchange);
1403 break;
1404
1405 case SIOCSIFPHYADDR:
1406 case SIOCDIFPHYADDR:
1407#ifdef INET6
1408 case SIOCSIFPHYADDR_IN6:
1409#endif
1410 case SIOCSLIFPHYADDR:
1411 case SIOCSIFMEDIA:
1412 case SIOCSIFGENERIC:
1413 error = suser(td);
1414 if (error)
1415 return (error);
1416 if (ifp->if_ioctl == NULL)
1417 return (EOPNOTSUPP);
1418 error = (*ifp->if_ioctl)(ifp, cmd, data);
1419 if (error == 0)
1420 getmicrotime(&ifp->if_lastchange);
1421 break;
1422
1423 case SIOCGIFSTATUS:
1424 ifs = (struct ifstat *)data;
1425 ifs->ascii[0] = '\0';
1426
1427 case SIOCGIFPSRCADDR:
1428 case SIOCGIFPDSTADDR:
1429 case SIOCGLIFPHYADDR:
1430 case SIOCGIFMEDIA:
1431 case SIOCGIFGENERIC:
1432 if (ifp->if_ioctl == 0)
1433 return (EOPNOTSUPP);
1434 error = (*ifp->if_ioctl)(ifp, cmd, data);
1435 break;
1436
1437 case SIOCSIFLLADDR:
1438 error = suser(td);
1439 if (error)
1440 return (error);
1441 error = if_setlladdr(ifp,
1442 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1443 break;
1444
1445 default:
1446 error = ENOIOCTL;
1447 break;
1448 }
1449 return (error);
1450}
1451
1452/*
1453 * Interface ioctls.
1454 */
1455int
1456ifioctl(so, cmd, data, td)
1457 struct socket *so;
1458 u_long cmd;
1459 caddr_t data;
1460 struct thread *td;
1461{
1462 struct ifnet *ifp;
1463 struct ifreq *ifr;
1464 int error;
1465 int oif_flags;
1466
1467 switch (cmd) {
1468 case SIOCGIFCONF:
1469 case OSIOCGIFCONF:
1470 return (ifconf(cmd, data));
1471 }
1472 ifr = (struct ifreq *)data;
1473
1474 switch (cmd) {
1475 case SIOCIFCREATE:
1476 case SIOCIFDESTROY:
1477 if ((error = suser(td)) != 0)
1478 return (error);
1479 return ((cmd == SIOCIFCREATE) ?
1480 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1481 if_clone_destroy(ifr->ifr_name));
1482
1483 case SIOCIFGCLONERS:
1484 return (if_clone_list((struct if_clonereq *)data));
1485 }
1486
1487 ifp = ifunit(ifr->ifr_name);
1488 if (ifp == 0)
1489 return (ENXIO);
1490
1491 error = ifhwioctl(cmd, ifp, data, td);
1492 if (error != ENOIOCTL)
1493 return (error);
1494
1495 oif_flags = ifp->if_flags;
1496 if (so->so_proto == 0)
1497 return (EOPNOTSUPP);
1498#ifndef COMPAT_43
1499 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
1500 data,
1501 ifp, td));
1502#else
1503 {
1504 int ocmd = cmd;
1505
1506 switch (cmd) {
1507
1508 case SIOCSIFDSTADDR:
1509 case SIOCSIFADDR:
1510 case SIOCSIFBRDADDR:
1511 case SIOCSIFNETMASK:
1512#if BYTE_ORDER != BIG_ENDIAN
1513 if (ifr->ifr_addr.sa_family == 0 &&
1514 ifr->ifr_addr.sa_len < 16) {
1515 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1516 ifr->ifr_addr.sa_len = 16;
1517 }
1518#else
1519 if (ifr->ifr_addr.sa_len == 0)
1520 ifr->ifr_addr.sa_len = 16;
1521#endif
1522 break;
1523
1524 case OSIOCGIFADDR:
1525 cmd = SIOCGIFADDR;
1526 break;
1527
1528 case OSIOCGIFDSTADDR:
1529 cmd = SIOCGIFDSTADDR;
1530 break;
1531
1532 case OSIOCGIFBRDADDR:
1533 cmd = SIOCGIFBRDADDR;
1534 break;
1535
1536 case OSIOCGIFNETMASK:
1537 cmd = SIOCGIFNETMASK;
1538 }
1539 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
1540 cmd,
1541 data,
1542 ifp, td));
1543 switch (ocmd) {
1544
1545 case OSIOCGIFADDR:
1546 case OSIOCGIFDSTADDR:
1547 case OSIOCGIFBRDADDR:
1548 case OSIOCGIFNETMASK:
1549 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1550
1551 }
1552 }
1553#endif /* COMPAT_43 */
1554
1555 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1556#ifdef INET6
1557 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1558 if (ifp->if_flags & IFF_UP) {
1559 int s = splimp();
1560 in6_if_up(ifp);
1561 splx(s);
1562 }
1563#endif
1564 }
1565 return (error);
1566}
1567
1568/*
1569 * Set/clear promiscuous mode on interface ifp based on the truth value
1570 * of pswitch. The calls are reference counted so that only the first
1571 * "on" request actually has an effect, as does the final "off" request.
1572 * Results are undefined if the "off" and "on" requests are not matched.
1573 */
1574int
1575ifpromisc(ifp, pswitch)
1576 struct ifnet *ifp;
1577 int pswitch;
1578{
1579 struct ifreq ifr;
1580 int error;
1581 int oldflags, oldpcount;
1582
1583 oldpcount = ifp->if_pcount;
1584 oldflags = ifp->if_flags;
1585 if (ifp->if_flags & IFF_PPROMISC) {
1586 /* Do nothing if device is in permanently promiscuous mode */
1587 ifp->if_pcount += pswitch ? 1 : -1;
1588 return (0);
1589 }
1590 if (pswitch) {
1591 /*
1592 * If the device is not configured up, we cannot put it in
1593 * promiscuous mode.
1594 */
1595 if ((ifp->if_flags & IFF_UP) == 0)
1596 return (ENETDOWN);
1597 if (ifp->if_pcount++ != 0)
1598 return (0);
1599 ifp->if_flags |= IFF_PROMISC;
1600 } else {
1601 if (--ifp->if_pcount > 0)
1602 return (0);
1603 ifp->if_flags &= ~IFF_PROMISC;
1604 }
1605 ifr.ifr_flags = ifp->if_flags & 0xffff;
1606 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1607 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1608 if (error == 0) {
1609 log(LOG_INFO, "%s%d: promiscuous mode %s\n",
1610 ifp->if_name, ifp->if_unit,
1611 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
1612 rt_ifmsg(ifp);
1613 } else {
1614 ifp->if_pcount = oldpcount;
1615 ifp->if_flags = oldflags;
1616 }
1617 return error;
1618}
1619
1620/*
1621 * Return interface configuration
1622 * of system. List may be used
1623 * in later ioctl's (above) to get
1624 * other information.
1625 */
1626/*ARGSUSED*/
1627static int
1628ifconf(cmd, data)
1629 u_long cmd;
1630 caddr_t data;
1631{
1632 struct ifconf *ifc = (struct ifconf *)data;
1633 struct ifnet *ifp;
1634 struct ifaddr *ifa;
1635 struct ifreq ifr, *ifrp;
1636 int space = ifc->ifc_len, error = 0;
1637
1638 ifrp = ifc->ifc_req;
1639 IFNET_RLOCK(); /* could sleep XXX */
1640 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1641 char workbuf[64];
1642 int ifnlen, addrs;
1643
1644 if (space < sizeof(ifr))
1645 break;
1646 ifnlen = snprintf(workbuf, sizeof(workbuf),
1647 "%s%d", ifp->if_name, ifp->if_unit);
1648 if(ifnlen + 1 > sizeof ifr.ifr_name) {
1649 error = ENAMETOOLONG;
1650 break;
1651 } else {
1652 strcpy(ifr.ifr_name, workbuf);
1653 }
1654
1655 addrs = 0;
1656 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1657 struct sockaddr *sa = ifa->ifa_addr;
1658
1659 if (space < sizeof(ifr))
1660 break;
1661 if (jailed(curthread->td_ucred) &&
1662 prison_if(curthread->td_ucred, sa))
1663 continue;
1664 addrs++;
1665#ifdef COMPAT_43
1666 if (cmd == OSIOCGIFCONF) {
1667 struct osockaddr *osa =
1668 (struct osockaddr *)&ifr.ifr_addr;
1669 ifr.ifr_addr = *sa;
1670 osa->sa_family = sa->sa_family;
1671 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1672 sizeof (ifr));
1673 ifrp++;
1674 } else
1675#endif
1676 if (sa->sa_len <= sizeof(*sa)) {
1677 ifr.ifr_addr = *sa;
1678 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1679 sizeof (ifr));
1680 ifrp++;
1681 } else {
1682 if (space < sizeof (ifr) + sa->sa_len -
1683 sizeof(*sa))
1684 break;
1685 space -= sa->sa_len - sizeof(*sa);
1686 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1687 sizeof (ifr.ifr_name));
1688 if (error == 0)
1689 error = copyout((caddr_t)sa,
1690 (caddr_t)&ifrp->ifr_addr, sa->sa_len);
1691 ifrp = (struct ifreq *)
1692 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1693 }
1694 if (error)
1695 break;
1696 space -= sizeof (ifr);
1697 }
1698 if (error)
1699 break;
1700 if (!addrs) {
1701 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
1702 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1703 sizeof (ifr));
1704 if (error)
1705 break;
1706 space -= sizeof (ifr);
1707 ifrp++;
1708 }
1709 }
1710 IFNET_RUNLOCK();
1711 ifc->ifc_len -= space;
1712 return (error);
1713}
1714
1715/*
1716 * Just like if_promisc(), but for all-multicast-reception mode.
1717 */
1718int
1719if_allmulti(ifp, onswitch)
1720 struct ifnet *ifp;
1721 int onswitch;
1722{
1723 int error = 0;
1724 int s = splimp();
1725 struct ifreq ifr;
1726
1727 if (onswitch) {
1728 if (ifp->if_amcount++ == 0) {
1729 ifp->if_flags |= IFF_ALLMULTI;
1730 ifr.ifr_flags = ifp->if_flags & 0xffff;
1731 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1732 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1733 }
1734 } else {
1735 if (ifp->if_amcount > 1) {
1736 ifp->if_amcount--;
1737 } else {
1738 ifp->if_amcount = 0;
1739 ifp->if_flags &= ~IFF_ALLMULTI;
1740 ifr.ifr_flags = ifp->if_flags & 0xffff;;
1741 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1742 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1743 }
1744 }
1745 splx(s);
1746
1747 if (error == 0)
1748 rt_ifmsg(ifp);
1749 return error;
1750}
1751
1752/*
1753 * Add a multicast listenership to the interface in question.
1754 * The link layer provides a routine which converts
1755 */
1756int
1757if_addmulti(ifp, sa, retifma)
1758 struct ifnet *ifp; /* interface to manipulate */
1759 struct sockaddr *sa; /* address to add */
1760 struct ifmultiaddr **retifma;
1761{
1762 struct sockaddr *llsa, *dupsa;
1763 int error, s;
1764 struct ifmultiaddr *ifma;
1765
1766 /*
1767 * If the matching multicast address already exists
1768 * then don't add a new one, just add a reference
1769 */
1770 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1771 if (equal(sa, ifma->ifma_addr)) {
1772 ifma->ifma_refcount++;
1773 if (retifma)
1774 *retifma = ifma;
1775 return 0;
1776 }
1777 }
1778
1779 /*
1780 * Give the link layer a chance to accept/reject it, and also
1781 * find out which AF_LINK address this maps to, if it isn't one
1782 * already.
1783 */
1784 if (ifp->if_resolvemulti) {
1785 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1786 if (error) return error;
1787 } else {
1788 llsa = 0;
1789 }
1790
1791 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1792 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1793 bcopy(sa, dupsa, sa->sa_len);
1794
1795 ifma->ifma_addr = dupsa;
1796 ifma->ifma_lladdr = llsa;
1797 ifma->ifma_ifp = ifp;
1798 ifma->ifma_refcount = 1;
1799 ifma->ifma_protospec = 0;
1800 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1801
1802 /*
1803 * Some network interfaces can scan the address list at
1804 * interrupt time; lock them out.
1805 */
1806 s = splimp();
1807 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1808 splx(s);
1809 if (retifma != NULL)
1810 *retifma = ifma;
1811
1812 if (llsa != 0) {
1813 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1814 if (equal(ifma->ifma_addr, llsa))
1815 break;
1816 }
1817 if (ifma) {
1818 ifma->ifma_refcount++;
1819 } else {
1820 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1821 M_IFMADDR, M_WAITOK);
1822 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1823 M_IFMADDR, M_WAITOK);
1824 bcopy(llsa, dupsa, llsa->sa_len);
1825 ifma->ifma_addr = dupsa;
1826 ifma->ifma_ifp = ifp;
1827 ifma->ifma_refcount = 1;
1828 s = splimp();
1829 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1830 splx(s);
1831 }
1832 }
1833 /*
1834 * We are certain we have added something, so call down to the
1835 * interface to let them know about it.
1836 */
1837 s = splimp();
1838 ifp->if_ioctl(ifp, SIOCADDMULTI, 0);
1839 splx(s);
1840
1841 return 0;
1842}
1843
1844/*
1845 * Remove a reference to a multicast address on this interface. Yell
1846 * if the request does not match an existing membership.
1847 */
1848int
1849if_delmulti(ifp, sa)
1850 struct ifnet *ifp;
1851 struct sockaddr *sa;
1852{
1853 struct ifmultiaddr *ifma;
1854 int s;
1855
1856 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1857 if (equal(sa, ifma->ifma_addr))
1858 break;
1859 if (ifma == 0)
1860 return ENOENT;
1861
1862 if (ifma->ifma_refcount > 1) {
1863 ifma->ifma_refcount--;
1864 return 0;
1865 }
1866
1867 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1868 sa = ifma->ifma_lladdr;
1869 s = splimp();
1870 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1871 /*
1872 * Make sure the interface driver is notified
1873 * in the case of a link layer mcast group being left.
1874 */
1875 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
1876 ifp->if_ioctl(ifp, SIOCDELMULTI, 0);
1877 splx(s);
1878 free(ifma->ifma_addr, M_IFMADDR);
1879 free(ifma, M_IFMADDR);
1880 if (sa == 0)
1881 return 0;
1882
1883 /*
1884 * Now look for the link-layer address which corresponds to
1885 * this network address. It had been squirreled away in
1886 * ifma->ifma_lladdr for this purpose (so we don't have
1887 * to call ifp->if_resolvemulti() again), and we saved that
1888 * value in sa above. If some nasty deleted the
1889 * link-layer address out from underneath us, we can deal because
1890 * the address we stored was is not the same as the one which was
1891 * in the record for the link-layer address. (So we don't complain
1892 * in that case.)
1893 */
1894 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1895 if (equal(sa, ifma->ifma_addr))
1896 break;
1897 if (ifma == 0)
1898 return 0;
1899
1900 if (ifma->ifma_refcount > 1) {
1901 ifma->ifma_refcount--;
1902 return 0;
1903 }
1904
1905 s = splimp();
1906 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1907 ifp->if_ioctl(ifp, SIOCDELMULTI, 0);
1908 splx(s);
1909 free(ifma->ifma_addr, M_IFMADDR);
1910 free(sa, M_IFMADDR);
1911 free(ifma, M_IFMADDR);
1912
1913 return 0;
1914}
1915
1916/*
1917 * Set the link layer address on an interface.
1918 *
1919 * At this time we only support certain types of interfaces,
1920 * and we don't allow the length of the address to change.
1921 */
1922int
1923if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1924{
1925 struct sockaddr_dl *sdl;
1926 struct ifaddr *ifa;
1927 struct ifreq ifr;
1928
1929 ifa = ifaddr_byindex(ifp->if_index);
1930 if (ifa == NULL)
1931 return (EINVAL);
1932 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1933 if (sdl == NULL)
1934 return (EINVAL);
1935 if (len != sdl->sdl_alen) /* don't allow length to change */
1936 return (EINVAL);
1937 switch (ifp->if_type) {
1938 case IFT_ETHER: /* these types use struct arpcom */
1939 case IFT_FDDI:
1940 case IFT_XETHER:
1941 case IFT_ISO88025:
1942 case IFT_L2VLAN:
1943 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1944 /* FALLTHROUGH */
1945 case IFT_ARCNET:
1946 bcopy(lladdr, LLADDR(sdl), len);
1947 break;
1948 default:
1949 return (ENODEV);
1950 }
1951 /*
1952 * If the interface is already up, we need
1953 * to re-init it in order to reprogram its
1954 * address filter.
1955 */
1956 if ((ifp->if_flags & IFF_UP) != 0) {
1957 ifp->if_flags &= ~IFF_UP;
1958 ifr.ifr_flags = ifp->if_flags & 0xffff;
1959 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1960 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1961 ifp->if_flags |= IFF_UP;
1962 ifr.ifr_flags = ifp->if_flags & 0xffff;
1963 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1964 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1965#ifdef INET
1966 /*
1967 * Also send gratuitous ARPs to notify other nodes about
1968 * the address change.
1969 */
1970 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1971 if (ifa->ifa_addr != NULL &&
1972 ifa->ifa_addr->sa_family == AF_INET)
1973 arp_ifinit(ifp, ifa);
1974 }
1975#endif
1976 }
1977 return (0);
1978}
1979
1980struct ifmultiaddr *
1981ifmaof_ifpforaddr(sa, ifp)
1982 struct sockaddr *sa;
1983 struct ifnet *ifp;
1984{
1985 struct ifmultiaddr *ifma;
1986
1987 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1988 if (equal(ifma->ifma_addr, sa))
1989 break;
1990
1991 return ifma;
1992}
1993
1994int
1995if_printf(struct ifnet *ifp, const char * fmt, ...)
1996{
1997 va_list ap;
1998 int retval;
1999
2000 retval = printf("%s%d: ", ifp->if_name, ifp->if_unit);
2001 va_start(ap, fmt);
2002 retval += vprintf(fmt, ap);
2003 va_end(ap);
2004 return (retval);
2005}
2006
2007SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
2008SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
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