Use ether_crc32_be.
[dragonfly.git] / sys / net / if.c
CommitLineData
984263bc
MD
1/*
2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * @(#)if.c 8.3 (Berkeley) 1/4/94
f23061d4 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
95f018e8 35 * $DragonFly: src/sys/net/if.c,v 1.33 2005/04/15 18:39:13 dillon Exp $
984263bc
MD
36 */
37
38#include "opt_compat.h"
39#include "opt_inet6.h"
40#include "opt_inet.h"
41
42#include <sys/param.h>
43#include <sys/malloc.h>
44#include <sys/mbuf.h>
45#include <sys/systm.h>
46#include <sys/proc.h>
6b6e0885 47#include <sys/protosw.h>
984263bc
MD
48#include <sys/socket.h>
49#include <sys/socketvar.h>
6b6e0885 50#include <sys/socketops.h>
984263bc
MD
51#include <sys/protosw.h>
52#include <sys/kernel.h>
53#include <sys/sockio.h>
54#include <sys/syslog.h>
55#include <sys/sysctl.h>
698ac46c 56#include <sys/domain.h>
984263bc
MD
57
58#include <net/if.h>
59#include <net/if_arp.h>
60#include <net/if_dl.h>
61#include <net/if_types.h>
62#include <net/if_var.h>
4d723e5a 63#include <net/ifq_var.h>
984263bc
MD
64#include <net/radix.h>
65#include <net/route.h>
66#include <machine/stdarg.h>
67
68#if defined(INET) || defined(INET6)
69/*XXX*/
70#include <netinet/in.h>
71#include <netinet/in_var.h>
72#include <netinet/if_ether.h>
73#ifdef INET6
74#include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
75#include <netinet6/in6_var.h>
76#include <netinet6/in6_ifattach.h>
77#endif
78#endif
79
9eee10d0
DRJ
80#if defined(COMPAT_43)
81#include <emulation/43bsd/43bsd_socket.h>
82#endif /* COMPAT_43 */
83
e3e4574a
JS
84/*
85 * Support for non-ALTQ interfaces.
86 */
87static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *,
88 struct altq_pktattr *);
89static struct mbuf *
90 ifq_classic_dequeue(struct ifaltq *, int);
91static int ifq_classic_request(struct ifaltq *, int, void *);
92
984263bc
MD
93/*
94 * System initialization
95 */
96
698ac46c
HS
97static void if_attachdomain(void *);
98static void if_attachdomain1(struct ifnet *);
61b8d551 99static int ifconf (u_long, caddr_t, struct thread *);
158abb01 100static void ifinit (void *);
158abb01
RG
101static void if_slowtimo (void *);
102static void link_rtrequest (int, struct rtentry *, struct rt_addrinfo *);
103static int if_rtdel (struct radix_node *, void *);
984263bc
MD
104
105SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
106
107MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
108MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
b7b982e2 109MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
984263bc
MD
110
111int ifqmaxlen = IFQ_MAXLEN;
112struct ifnethead ifnet; /* depend on static init XXX */
113
114#ifdef INET6
115/*
116 * XXX: declare here to avoid to include many inet6 related files..
117 * should be more generalized?
118 */
158abb01 119extern void nd6_setmtu (struct ifnet *);
984263bc
MD
120#endif
121
158abb01
RG
122struct if_clone *if_clone_lookup (const char *, int *);
123int if_clone_list (struct if_clonereq *);
984263bc
MD
124
125LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
126int if_cloners_count;
127
abbb44bb
JS
128struct callout if_slowtimo_timer;
129
984263bc
MD
130/*
131 * Network interface utility routines.
132 *
133 * Routines with ifa_ifwith* names take sockaddr *'s as
134 * parameters.
135 */
136/* ARGSUSED*/
137void
f23061d4 138ifinit(void *dummy)
984263bc
MD
139{
140 struct ifnet *ifp;
141 int s;
142
abbb44bb
JS
143 callout_init(&if_slowtimo_timer);
144
984263bc
MD
145 s = splimp();
146 TAILQ_FOREACH(ifp, &ifnet, if_link) {
147 if (ifp->if_snd.ifq_maxlen == 0) {
3e4a09e7 148 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
984263bc
MD
149 ifp->if_snd.ifq_maxlen = ifqmaxlen;
150 }
151 }
152 splx(s);
abbb44bb 153
984263bc
MD
154 if_slowtimo(0);
155}
156
157int if_index = 0;
158struct ifaddr **ifnet_addrs;
159struct ifnet **ifindex2ifnet = NULL;
160
984263bc
MD
161/*
162 * Attach an interface to the
163 * list of "active" interfaces.
164 */
165void
f23061d4 166if_attach(struct ifnet *ifp)
984263bc
MD
167{
168 unsigned socksize, ifasize;
169 int namelen, masklen;
82ed7fc2
RG
170 struct sockaddr_dl *sdl;
171 struct ifaddr *ifa;
e3e4574a 172 struct ifaltq *ifq;
590b8cd4 173
984263bc 174 static int if_indexlim = 8;
590b8cd4 175 static boolean_t inited;
984263bc
MD
176
177 if (!inited) {
178 TAILQ_INIT(&ifnet);
590b8cd4 179 inited = TRUE;
984263bc
MD
180 }
181
182 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
183 ifp->if_index = ++if_index;
184 /*
185 * XXX -
186 * The old code would work if the interface passed a pre-existing
187 * chain of ifaddrs to this code. We don't trust our callers to
188 * properly initialize the tailq, however, so we no longer allow
189 * this unlikely case.
190 */
191 TAILQ_INIT(&ifp->if_addrhead);
192 TAILQ_INIT(&ifp->if_prefixhead);
193 LIST_INIT(&ifp->if_multiaddrs);
194 getmicrotime(&ifp->if_lastchange);
f23061d4 195 if (ifnet_addrs == NULL || if_index >= if_indexlim) {
590b8cd4
JH
196 unsigned int n;
197 caddr_t q;
198
199 if_indexlim <<= 1;
200 n = if_indexlim * sizeof(struct ifaddr *);
201 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
f23061d4
JH
202 if (ifnet_addrs != NULL) {
203 bcopy(ifnet_addrs, q, n/2);
204 free(ifnet_addrs, M_IFADDR);
984263bc
MD
205 }
206 ifnet_addrs = (struct ifaddr **)q;
207
208 /* grow ifindex2ifnet */
209 n = if_indexlim * sizeof(struct ifnet *);
590b8cd4 210 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
984263bc 211 if (ifindex2ifnet) {
f23061d4
JH
212 bcopy(ifindex2ifnet, q, n/2);
213 free(ifindex2ifnet, M_IFADDR);
984263bc
MD
214 }
215 ifindex2ifnet = (struct ifnet **)q;
216 }
217
218 ifindex2ifnet[if_index] = ifp;
219
220 /*
221 * create a Link Level name for this device
222 */
3e4a09e7 223 namelen = strlen(ifp->if_xname);
984263bc
MD
224#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
225 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
226 socksize = masklen + ifp->if_addrlen;
227#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
228 if (socksize < sizeof(*sdl))
229 socksize = sizeof(*sdl);
230 socksize = ROUNDUP(socksize);
590b8cd4
JH
231 ifasize = sizeof(struct ifaddr) + 2 * socksize;
232 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
233 sdl = (struct sockaddr_dl *)(ifa + 1);
234 sdl->sdl_len = socksize;
235 sdl->sdl_family = AF_LINK;
236 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
237 sdl->sdl_nlen = namelen;
238 sdl->sdl_index = ifp->if_index;
239 sdl->sdl_type = ifp->if_type;
240 ifnet_addrs[if_index - 1] = ifa;
241 ifa->ifa_ifp = ifp;
242 ifa->ifa_rtrequest = link_rtrequest;
243 ifa->ifa_addr = (struct sockaddr *)sdl;
244 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
245 ifa->ifa_netmask = (struct sockaddr *)sdl;
246 sdl->sdl_len = masklen;
247 while (namelen != 0)
248 sdl->sdl_data[--namelen] = 0xff;
249 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
984263bc 250
f2bd8b67
JS
251 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
252
e3e4574a
JS
253 ifq = &ifp->if_snd;
254 ifq->altq_type = 0;
255 ifq->altq_disc = NULL;
256 ifq->altq_flags &= ALTQF_CANTCHANGE;
257 ifq->altq_tbr = NULL;
258 ifq->altq_ifp = ifp;
b2f93efe 259 ifq_set_classic(ifq);
4d723e5a 260
9c70fe43 261 if (!SLIST_EMPTY(&domains))
698ac46c
HS
262 if_attachdomain1(ifp);
263
984263bc
MD
264 /* Announce the interface. */
265 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
266}
267
698ac46c
HS
268static void
269if_attachdomain(void *dummy)
270{
271 struct ifnet *ifp;
272 int s;
273
274 s = splnet();
275 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
276 if_attachdomain1(ifp);
277 splx(s);
278}
279SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
280 if_attachdomain, NULL);
281
282static void
283if_attachdomain1(struct ifnet *ifp)
284{
285 struct domain *dp;
286 int s;
287
288 s = splnet();
289
290 /* address family dependent data region */
291 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
9c70fe43 292 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
293 if (dp->dom_ifattach)
294 ifp->if_afdata[dp->dom_family] =
295 (*dp->dom_ifattach)(ifp);
698ac46c
HS
296 splx(s);
297}
298
984263bc
MD
299/*
300 * Detach an interface, removing it from the
301 * list of "active" interfaces.
302 */
303void
f23061d4 304if_detach(struct ifnet *ifp)
984263bc
MD
305{
306 struct ifaddr *ifa;
307 struct radix_node_head *rnh;
308 int s;
309 int i;
698ac46c 310 struct domain *dp;
984263bc 311
f2bd8b67
JS
312 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
313
984263bc
MD
314 /*
315 * Remove routes and flush queues.
316 */
317 s = splnet();
318 if_down(ifp);
319
4d723e5a
JS
320 if (ifq_is_enabled(&ifp->if_snd))
321 altq_disable(&ifp->if_snd);
322 if (ifq_is_attached(&ifp->if_snd))
323 altq_detach(&ifp->if_snd);
324
984263bc
MD
325 /*
326 * Remove address from ifnet_addrs[] and maybe decrement if_index.
327 * Clean up all addresses.
328 */
329 ifnet_addrs[ifp->if_index - 1] = 0;
330 while (if_index > 0 && ifnet_addrs[if_index - 1] == 0)
331 if_index--;
332
333 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
334 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
335#ifdef INET
336 /* XXX: Ugly!! ad hoc just for INET */
337 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
338 struct ifaliasreq ifr;
339
f23061d4 340 bzero(&ifr, sizeof ifr);
984263bc
MD
341 ifr.ifra_addr = *ifa->ifa_addr;
342 if (ifa->ifa_dstaddr)
343 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
344 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
590b8cd4 345 NULL) == 0)
984263bc
MD
346 continue;
347 }
348#endif /* INET */
349#ifdef INET6
350 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
351 in6_purgeaddr(ifa);
352 /* ifp_addrhead is already updated */
353 continue;
354 }
355#endif /* INET6 */
356 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
357 IFAFREE(ifa);
358 }
359
360#ifdef INET6
361 /*
362 * Remove all IPv6 kernel structs related to ifp. This should be done
363 * before removing routing entries below, since IPv6 interface direct
364 * routes are expected to be removed by the IPv6-specific kernel API.
365 * Otherwise, the kernel will detect some inconsistency and bark it.
366 */
367 in6_ifdetach(ifp);
368#endif
369
370 /*
371 * Delete all remaining routes using this interface
372 * Unfortuneatly the only way to do this is to slog through
373 * the entire routing table looking for routes which point
374 * to this interface...oh well...
375 */
376 for (i = 1; i <= AF_MAX; i++) {
377 if ((rnh = rt_tables[i]) == NULL)
378 continue;
f23061d4 379 rnh->rnh_walktree(rnh, if_rtdel, ifp);
984263bc
MD
380 }
381
382 /* Announce that the interface is gone. */
383 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
384
9c70fe43 385 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
386 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
387 (*dp->dom_ifdetach)(ifp,
388 ifp->if_afdata[dp->dom_family]);
698ac46c 389
75857e7c
DR
390 ifindex2ifnet[ifp->if_index] = NULL;
391
984263bc
MD
392 TAILQ_REMOVE(&ifnet, ifp, if_link);
393 splx(s);
394}
395
396/*
397 * Delete Routes for a Network Interface
f23061d4 398 *
984263bc
MD
399 * Called for each routing entry via the rnh->rnh_walktree() call above
400 * to delete all route entries referencing a detaching network interface.
401 *
402 * Arguments:
403 * rn pointer to node in the routing table
404 * arg argument passed to rnh->rnh_walktree() - detaching interface
405 *
406 * Returns:
407 * 0 successful
408 * errno failed - reason indicated
409 *
410 */
411static int
f23061d4 412if_rtdel(struct radix_node *rn, void *arg)
984263bc
MD
413{
414 struct rtentry *rt = (struct rtentry *)rn;
415 struct ifnet *ifp = arg;
416 int err;
417
418 if (rt->rt_ifp == ifp) {
419
420 /*
421 * Protect (sorta) against walktree recursion problems
422 * with cloned routes
423 */
f23061d4 424 if (!(rt->rt_flags & RTF_UP))
984263bc
MD
425 return (0);
426
427 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
428 rt_mask(rt), rt->rt_flags,
429 (struct rtentry **) NULL);
430 if (err) {
431 log(LOG_WARNING, "if_rtdel: error %d\n", err);
432 }
433 }
434
435 return (0);
436}
437
438/*
439 * Create a clone network interface.
440 */
441int
f23061d4 442if_clone_create(char *name, int len)
984263bc
MD
443{
444 struct if_clone *ifc;
445 char *dp;
b7b982e2 446 int wildcard, bytoff, bitoff;
984263bc
MD
447 int unit;
448 int err;
449
450 ifc = if_clone_lookup(name, &unit);
451 if (ifc == NULL)
452 return (EINVAL);
453
454 if (ifunit(name) != NULL)
455 return (EEXIST);
456
b7b982e2 457 bytoff = bitoff = 0;
984263bc 458 wildcard = (unit < 0);
b7b982e2
MD
459 /*
460 * Find a free unit if none was given.
461 */
462 if (wildcard) {
f23061d4
JH
463 while (bytoff < ifc->ifc_bmlen &&
464 ifc->ifc_units[bytoff] == 0xff)
b7b982e2
MD
465 bytoff++;
466 if (bytoff >= ifc->ifc_bmlen)
467 return (ENOSPC);
468 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
469 bitoff++;
470 unit = (bytoff << 3) + bitoff;
471 }
984263bc 472
b7b982e2
MD
473 if (unit > ifc->ifc_maxunit)
474 return (ENXIO);
475
476 err = (*ifc->ifc_create)(ifc, unit);
984263bc
MD
477 if (err != 0)
478 return (err);
479
b7b982e2
MD
480 if (!wildcard) {
481 bytoff = unit >> 3;
482 bitoff = unit - (bytoff << 3);
483 }
484
485 /*
486 * Allocate the unit in the bitmap.
487 */
488 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
489 ("%s: bit is already set", __func__));
490 ifc->ifc_units[bytoff] |= (1 << bitoff);
491
984263bc
MD
492 /* In the wildcard case, we need to update the name. */
493 if (wildcard) {
494 for (dp = name; *dp != '\0'; dp++);
495 if (snprintf(dp, len - (dp-name), "%d", unit) >
496 len - (dp-name) - 1) {
497 /*
498 * This can only be a programmer error and
499 * there's no straightforward way to recover if
500 * it happens.
501 */
502 panic("if_clone_create(): interface name too long");
503 }
b7b982e2 504
984263bc
MD
505 }
506
f2bd8b67
JS
507 EVENTHANDLER_INVOKE(if_clone_event, ifc);
508
984263bc
MD
509 return (0);
510}
511
512/*
513 * Destroy a clone network interface.
514 */
515int
f23061d4 516if_clone_destroy(const char *name)
984263bc
MD
517{
518 struct if_clone *ifc;
519 struct ifnet *ifp;
b7b982e2
MD
520 int bytoff, bitoff;
521 int unit;
984263bc 522
b7b982e2 523 ifc = if_clone_lookup(name, &unit);
984263bc
MD
524 if (ifc == NULL)
525 return (EINVAL);
526
b7b982e2
MD
527 if (unit < ifc->ifc_minifs)
528 return (EINVAL);
529
984263bc
MD
530 ifp = ifunit(name);
531 if (ifp == NULL)
532 return (ENXIO);
533
534 if (ifc->ifc_destroy == NULL)
535 return (EOPNOTSUPP);
536
537 (*ifc->ifc_destroy)(ifp);
b7b982e2
MD
538
539 /*
540 * Compute offset in the bitmap and deallocate the unit.
541 */
542 bytoff = unit >> 3;
543 bitoff = unit - (bytoff << 3);
544 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
545 ("%s: bit is already cleared", __func__));
546 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
984263bc
MD
547 return (0);
548}
549
550/*
551 * Look up a network interface cloner.
552 */
553struct if_clone *
f23061d4 554if_clone_lookup(const char *name, int *unitp)
984263bc
MD
555{
556 struct if_clone *ifc;
557 const char *cp;
558 int i;
559
560 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
561 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
562 if (ifc->ifc_name[i] != *cp)
563 goto next_ifc;
564 }
565 goto found_name;
566 next_ifc:
567 ifc = LIST_NEXT(ifc, ifc_list);
568 }
569
570 /* No match. */
571 return ((struct if_clone *)NULL);
572
573 found_name:
574 if (*cp == '\0') {
575 i = -1;
576 } else {
577 for (i = 0; *cp != '\0'; cp++) {
578 if (*cp < '0' || *cp > '9') {
579 /* Bogus unit number. */
580 return (NULL);
581 }
582 i = (i * 10) + (*cp - '0');
583 }
584 }
585
586 if (unitp != NULL)
587 *unitp = i;
588 return (ifc);
589}
590
591/*
592 * Register a network interface cloner.
593 */
594void
f23061d4 595if_clone_attach(struct if_clone *ifc)
984263bc 596{
b7b982e2
MD
597 int bytoff, bitoff;
598 int err;
599 int len, maxclone;
600 int unit;
601
602 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
603 ("%s: %s requested more units then allowed (%d > %d)",
604 __func__, ifc->ifc_name, ifc->ifc_minifs,
605 ifc->ifc_maxunit + 1));
606 /*
607 * Compute bitmap size and allocate it.
608 */
609 maxclone = ifc->ifc_maxunit + 1;
610 len = maxclone >> 3;
611 if ((len << 3) < maxclone)
612 len++;
613 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
614 ifc->ifc_bmlen = len;
984263bc
MD
615
616 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
617 if_cloners_count++;
b7b982e2
MD
618
619 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
620 err = (*ifc->ifc_create)(ifc, unit);
621 KASSERT(err == 0,
622 ("%s: failed to create required interface %s%d",
623 __func__, ifc->ifc_name, unit));
624
625 /* Allocate the unit in the bitmap. */
626 bytoff = unit >> 3;
627 bitoff = unit - (bytoff << 3);
628 ifc->ifc_units[bytoff] |= (1 << bitoff);
629 }
984263bc
MD
630}
631
632/*
633 * Unregister a network interface cloner.
634 */
635void
f23061d4 636if_clone_detach(struct if_clone *ifc)
984263bc
MD
637{
638
639 LIST_REMOVE(ifc, ifc_list);
b7b982e2 640 free(ifc->ifc_units, M_CLONE);
984263bc
MD
641 if_cloners_count--;
642}
643
644/*
645 * Provide list of interface cloners to userspace.
646 */
647int
f23061d4 648if_clone_list(struct if_clonereq *ifcr)
984263bc
MD
649{
650 char outbuf[IFNAMSIZ], *dst;
651 struct if_clone *ifc;
652 int count, error = 0;
653
654 ifcr->ifcr_total = if_cloners_count;
655 if ((dst = ifcr->ifcr_buffer) == NULL) {
656 /* Just asking how many there are. */
657 return (0);
658 }
659
660 if (ifcr->ifcr_count < 0)
661 return (EINVAL);
662
663 count = (if_cloners_count < ifcr->ifcr_count) ?
664 if_cloners_count : ifcr->ifcr_count;
665
666 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
667 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
3e4a09e7 668 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
984263bc
MD
669 error = copyout(outbuf, dst, IFNAMSIZ);
670 if (error)
671 break;
672 }
673
674 return (error);
675}
676
677/*
678 * Locate an interface based on a complete address.
679 */
984263bc 680struct ifaddr *
f23061d4 681ifa_ifwithaddr(struct sockaddr *addr)
984263bc 682{
82ed7fc2
RG
683 struct ifnet *ifp;
684 struct ifaddr *ifa;
984263bc 685
984263bc
MD
686 TAILQ_FOREACH(ifp, &ifnet, if_link)
687 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
688 if (ifa->ifa_addr->sa_family != addr->sa_family)
689 continue;
0c3c561c 690 if (sa_equal(addr, ifa->ifa_addr))
984263bc
MD
691 return (ifa);
692 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
0c3c561c 693 /* IPv6 doesn't have broadcast */
984263bc 694 ifa->ifa_broadaddr->sa_len != 0 &&
0c3c561c 695 sa_equal(ifa->ifa_broadaddr, addr))
984263bc
MD
696 return (ifa);
697 }
0c3c561c 698 return ((struct ifaddr *)NULL);
984263bc
MD
699}
700/*
701 * Locate the point to point interface with a given destination address.
702 */
984263bc 703struct ifaddr *
f23061d4 704ifa_ifwithdstaddr(struct sockaddr *addr)
984263bc 705{
82ed7fc2
RG
706 struct ifnet *ifp;
707 struct ifaddr *ifa;
984263bc
MD
708
709 TAILQ_FOREACH(ifp, &ifnet, if_link)
710 if (ifp->if_flags & IFF_POINTOPOINT)
711 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
712 if (ifa->ifa_addr->sa_family != addr->sa_family)
713 continue;
0c3c561c
JH
714 if (ifa->ifa_dstaddr &&
715 sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
716 return (ifa);
717 }
0c3c561c 718 return ((struct ifaddr *)NULL);
984263bc
MD
719}
720
721/*
722 * Find an interface on a specific network. If many, choice
723 * is most specific found.
724 */
725struct ifaddr *
f23061d4 726ifa_ifwithnet(struct sockaddr *addr)
984263bc 727{
82ed7fc2
RG
728 struct ifnet *ifp;
729 struct ifaddr *ifa;
984263bc
MD
730 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
731 u_int af = addr->sa_family;
732 char *addr_data = addr->sa_data, *cplim;
733
734 /*
735 * AF_LINK addresses can be looked up directly by their index number,
736 * so do that if we can.
737 */
738 if (af == AF_LINK) {
82ed7fc2 739 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
590b8cd4 740
984263bc
MD
741 if (sdl->sdl_index && sdl->sdl_index <= if_index)
742 return (ifnet_addrs[sdl->sdl_index - 1]);
743 }
744
745 /*
746 * Scan though each interface, looking for ones that have
747 * addresses in this address family.
748 */
749 TAILQ_FOREACH(ifp, &ifnet, if_link) {
750 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
82ed7fc2 751 char *cp, *cp2, *cp3;
984263bc
MD
752
753 if (ifa->ifa_addr->sa_family != af)
754next: continue;
755 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
756 /*
757 * This is a bit broken as it doesn't
758 * take into account that the remote end may
759 * be a single node in the network we are
760 * looking for.
761 * The trouble is that we don't know the
762 * netmask for the remote end.
763 */
0c3c561c
JH
764 if (ifa->ifa_dstaddr != NULL &&
765 sa_equal(addr, ifa->ifa_dstaddr))
f23061d4 766 return (ifa);
984263bc
MD
767 } else {
768 /*
769 * if we have a special address handler,
770 * then use it instead of the generic one.
771 */
f23061d4 772 if (ifa->ifa_claim_addr) {
984263bc
MD
773 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
774 return (ifa);
775 } else {
776 continue;
777 }
778 }
779
780 /*
781 * Scan all the bits in the ifa's address.
782 * If a bit dissagrees with what we are
783 * looking for, mask it with the netmask
784 * to see if it really matters.
785 * (A byte at a time)
786 */
787 if (ifa->ifa_netmask == 0)
788 continue;
789 cp = addr_data;
790 cp2 = ifa->ifa_addr->sa_data;
791 cp3 = ifa->ifa_netmask->sa_data;
590b8cd4
JH
792 cplim = ifa->ifa_netmask->sa_len +
793 (char *)ifa->ifa_netmask;
984263bc
MD
794 while (cp3 < cplim)
795 if ((*cp++ ^ *cp2++) & *cp3++)
796 goto next; /* next address! */
797 /*
798 * If the netmask of what we just found
799 * is more specific than what we had before
800 * (if we had one) then remember the new one
801 * before continuing to search
802 * for an even better one.
803 */
804 if (ifa_maybe == 0 ||
f23061d4
JH
805 rn_refines((char *)ifa->ifa_netmask,
806 (char *)ifa_maybe->ifa_netmask))
984263bc
MD
807 ifa_maybe = ifa;
808 }
809 }
810 }
811 return (ifa_maybe);
812}
813
814/*
815 * Find an interface address specific to an interface best matching
816 * a given address.
817 */
818struct ifaddr *
f23061d4 819ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
984263bc 820{
82ed7fc2
RG
821 struct ifaddr *ifa;
822 char *cp, *cp2, *cp3;
823 char *cplim;
984263bc
MD
824 struct ifaddr *ifa_maybe = 0;
825 u_int af = addr->sa_family;
826
827 if (af >= AF_MAX)
828 return (0);
829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
830 if (ifa->ifa_addr->sa_family != af)
831 continue;
832 if (ifa_maybe == 0)
833 ifa_maybe = ifa;
0c3c561c
JH
834 if (ifa->ifa_netmask == NULL) {
835 if (sa_equal(addr, ifa->ifa_addr) ||
836 (ifa->ifa_dstaddr != NULL &&
837 sa_equal(addr, ifa->ifa_dstaddr)))
984263bc
MD
838 return (ifa);
839 continue;
840 }
841 if (ifp->if_flags & IFF_POINTOPOINT) {
0c3c561c 842 if (sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
843 return (ifa);
844 } else {
845 cp = addr->sa_data;
846 cp2 = ifa->ifa_addr->sa_data;
847 cp3 = ifa->ifa_netmask->sa_data;
848 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
849 for (; cp3 < cplim; cp3++)
850 if ((*cp++ ^ *cp2++) & *cp3)
851 break;
852 if (cp3 == cplim)
853 return (ifa);
854 }
855 }
856 return (ifa_maybe);
857}
858
859#include <net/route.h>
860
861/*
862 * Default action when installing a route with a Link Level gateway.
863 * Lookup an appropriate real ifa to point to.
864 * This should be moved to /sys/net/link.c eventually.
865 */
866static void
f23061d4 867link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
984263bc 868{
82ed7fc2 869 struct ifaddr *ifa;
984263bc
MD
870 struct sockaddr *dst;
871 struct ifnet *ifp;
872
f23061d4
JH
873 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
874 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
984263bc
MD
875 return;
876 ifa = ifaof_ifpforaddr(dst, ifp);
f23061d4 877 if (ifa != NULL) {
984263bc 878 IFAFREE(rt->rt_ifa);
f23061d4 879 IFAREF(ifa);
984263bc 880 rt->rt_ifa = ifa;
984263bc
MD
881 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
882 ifa->ifa_rtrequest(cmd, rt, info);
883 }
884}
885
886/*
887 * Mark an interface down and notify protocols of
888 * the transition.
889 * NOTE: must be called at splnet or eqivalent.
890 */
891void
f23061d4 892if_unroute(struct ifnet *ifp, int flag, int fam)
984263bc 893{
82ed7fc2 894 struct ifaddr *ifa;
984263bc
MD
895
896 ifp->if_flags &= ~flag;
897 getmicrotime(&ifp->if_lastchange);
898 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
899 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
900 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
4d723e5a 901 ifq_purge(&ifp->if_snd);
984263bc
MD
902 rt_ifmsg(ifp);
903}
904
905/*
906 * Mark an interface up and notify protocols of
907 * the transition.
908 * NOTE: must be called at splnet or eqivalent.
909 */
910void
f23061d4 911if_route(struct ifnet *ifp, int flag, int fam)
984263bc 912{
82ed7fc2 913 struct ifaddr *ifa;
984263bc
MD
914
915 ifp->if_flags |= flag;
916 getmicrotime(&ifp->if_lastchange);
917 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
918 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
919 pfctlinput(PRC_IFUP, ifa->ifa_addr);
920 rt_ifmsg(ifp);
921#ifdef INET6
922 in6_if_up(ifp);
923#endif
924}
925
926/*
5c703385
MD
927 * Mark an interface down and notify protocols of the transition. An
928 * interface going down is also considered to be a synchronizing event.
929 * We must ensure that all packet processing related to the interface
930 * has completed before we return so e.g. the caller can free the ifnet
931 * structure that the mbufs may be referencing.
932 *
984263bc
MD
933 * NOTE: must be called at splnet or eqivalent.
934 */
935void
f23061d4 936if_down(struct ifnet *ifp)
984263bc
MD
937{
938
939 if_unroute(ifp, IFF_UP, AF_UNSPEC);
5c703385 940 netmsg_service_sync();
984263bc
MD
941}
942
943/*
944 * Mark an interface up and notify protocols of
945 * the transition.
946 * NOTE: must be called at splnet or eqivalent.
947 */
948void
f23061d4 949if_up(struct ifnet *ifp)
984263bc
MD
950{
951
952 if_route(ifp, IFF_UP, AF_UNSPEC);
953}
954
984263bc
MD
955/*
956 * Handle interface watchdog timer routines. Called
957 * from softclock, we decrement timers (if set) and
958 * call the appropriate interface routine on expiration.
959 */
960static void
f23061d4 961if_slowtimo(void *arg)
984263bc 962{
82ed7fc2 963 struct ifnet *ifp;
984263bc
MD
964 int s = splimp();
965
966 TAILQ_FOREACH(ifp, &ifnet, if_link) {
967 if (ifp->if_timer == 0 || --ifp->if_timer)
968 continue;
969 if (ifp->if_watchdog)
970 (*ifp->if_watchdog)(ifp);
971 }
972 splx(s);
abbb44bb 973 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
984263bc
MD
974}
975
976/*
977 * Map interface name to
978 * interface structure pointer.
979 */
980struct ifnet *
981ifunit(const char *name)
982{
984263bc 983 struct ifnet *ifp;
984263bc 984
984263bc 985 /*
3e4a09e7 986 * Search all the interfaces for this name/number
984263bc 987 */
3e4a09e7 988
984263bc 989 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 990 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
984263bc
MD
991 break;
992 }
993 return (ifp);
994}
995
996
997/*
998 * Map interface name in a sockaddr_dl to
999 * interface structure pointer.
1000 */
1001struct ifnet *
f23061d4 1002if_withname(struct sockaddr *sa)
984263bc
MD
1003{
1004 char ifname[IFNAMSIZ+1];
1005 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1006
1007 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1008 (sdl->sdl_nlen > IFNAMSIZ) )
1009 return NULL;
1010
1011 /*
1012 * ifunit wants a null-terminated name. It may not be null-terminated
1013 * in the sockaddr. We don't want to change the caller's sockaddr,
1014 * and there might not be room to put the trailing null anyway, so we
1015 * make a local copy that we know we can null terminate safely.
1016 */
1017
1018 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1019 ifname[sdl->sdl_nlen] = '\0';
1020 return ifunit(ifname);
1021}
1022
1023
1024/*
1025 * Interface ioctls.
1026 */
1027int
dadab5e9 1028ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
984263bc 1029{
41c20dac
MD
1030 struct ifnet *ifp;
1031 struct ifreq *ifr;
984263bc
MD
1032 struct ifstat *ifs;
1033 int error;
1034 short oif_flags;
1035 int new_flags;
1fdf0954
HP
1036 size_t namelen, onamelen;
1037 char new_name[IFNAMSIZ];
1038 struct ifaddr *ifa;
1039 struct sockaddr_dl *sdl;
984263bc
MD
1040
1041 switch (cmd) {
1042
1043 case SIOCGIFCONF:
1044 case OSIOCGIFCONF:
61b8d551 1045 return (ifconf(cmd, data, td));
984263bc
MD
1046 }
1047 ifr = (struct ifreq *)data;
1048
1049 switch (cmd) {
1050 case SIOCIFCREATE:
1051 case SIOCIFDESTROY:
dadab5e9 1052 if ((error = suser(td)) != 0)
984263bc
MD
1053 return (error);
1054 return ((cmd == SIOCIFCREATE) ?
1055 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1056 if_clone_destroy(ifr->ifr_name));
f23061d4 1057
984263bc
MD
1058 case SIOCIFGCLONERS:
1059 return (if_clone_list((struct if_clonereq *)data));
1060 }
1061
1062 ifp = ifunit(ifr->ifr_name);
1063 if (ifp == 0)
1064 return (ENXIO);
1065 switch (cmd) {
1066
1067 case SIOCGIFFLAGS:
1068 ifr->ifr_flags = ifp->if_flags;
46f25451 1069 ifr->ifr_flagshigh = ifp->if_flags >> 16;
984263bc
MD
1070 break;
1071
1072 case SIOCGIFCAP:
1073 ifr->ifr_reqcap = ifp->if_capabilities;
1074 ifr->ifr_curcap = ifp->if_capenable;
1075 break;
1076
1077 case SIOCGIFMETRIC:
1078 ifr->ifr_metric = ifp->if_metric;
1079 break;
1080
1081 case SIOCGIFMTU:
1082 ifr->ifr_mtu = ifp->if_mtu;
1083 break;
1084
1085 case SIOCGIFPHYS:
1086 ifr->ifr_phys = ifp->if_physical;
1087 break;
1088
1089 case SIOCSIFFLAGS:
dadab5e9 1090 error = suser(td);
984263bc
MD
1091 if (error)
1092 return (error);
1093 new_flags = (ifr->ifr_flags & 0xffff) |
1094 (ifr->ifr_flagshigh << 16);
1095 if (ifp->if_flags & IFF_SMART) {
1096 /* Smart drivers twiddle their own routes */
1097 } else if (ifp->if_flags & IFF_UP &&
1098 (new_flags & IFF_UP) == 0) {
1099 int s = splimp();
1100 if_down(ifp);
1101 splx(s);
1102 } else if (new_flags & IFF_UP &&
1103 (ifp->if_flags & IFF_UP) == 0) {
1104 int s = splimp();
1105 if_up(ifp);
1106 splx(s);
1107 }
1108 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1109 (new_flags &~ IFF_CANTCHANGE);
984263bc
MD
1110 if (new_flags & IFF_PPROMISC) {
1111 /* Permanently promiscuous mode requested */
1112 ifp->if_flags |= IFF_PROMISC;
1113 } else if (ifp->if_pcount == 0) {
1114 ifp->if_flags &= ~IFF_PROMISC;
1115 }
1116 if (ifp->if_ioctl)
f23061d4 1117 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1118 getmicrotime(&ifp->if_lastchange);
1119 break;
1120
1121 case SIOCSIFCAP:
dadab5e9 1122 error = suser(td);
984263bc
MD
1123 if (error)
1124 return (error);
1125 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1126 return (EINVAL);
f23061d4 1127 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1128 break;
1129
f23061d4
JH
1130 case SIOCSIFNAME:
1131 error = suser(td);
1132 if (error != 0)
1133 return (error);
1134 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1135 if (error != 0)
1136 return (error);
1fdf0954
HP
1137 if (new_name[0] == '\0')
1138 return (EINVAL);
f23061d4
JH
1139 if (ifunit(new_name) != NULL)
1140 return (EEXIST);
f2bd8b67
JS
1141
1142 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
f23061d4
JH
1143
1144 /* Announce the departure of the interface. */
1145 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1146
1147 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1148 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1149 /* XXX IFA_LOCK(ifa); */
1150 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1151 namelen = strlen(new_name);
1152 onamelen = sdl->sdl_nlen;
1153 /*
1154 * Move the address if needed. This is safe because we
1155 * allocate space for a name of length IFNAMSIZ when we
1156 * create this in if_attach().
1157 */
1158 if (namelen != onamelen) {
1159 bcopy(sdl->sdl_data + onamelen,
1160 sdl->sdl_data + namelen, sdl->sdl_alen);
1161 }
1162 bcopy(new_name, sdl->sdl_data, namelen);
1163 sdl->sdl_nlen = namelen;
1164 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1165 bzero(sdl->sdl_data, onamelen);
1166 while (namelen != 0)
1167 sdl->sdl_data[--namelen] = 0xff;
1168 /* XXX IFA_UNLOCK(ifa) */
f2bd8b67
JS
1169
1170 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
f23061d4
JH
1171
1172 /* Announce the return of the interface. */
1173 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1174 break;
1fdf0954 1175
984263bc 1176 case SIOCSIFMETRIC:
dadab5e9 1177 error = suser(td);
984263bc
MD
1178 if (error)
1179 return (error);
1180 ifp->if_metric = ifr->ifr_metric;
1181 getmicrotime(&ifp->if_lastchange);
1182 break;
1183
1184 case SIOCSIFPHYS:
dadab5e9 1185 error = suser(td);
984263bc
MD
1186 if (error)
1187 return error;
1188 if (!ifp->if_ioctl)
1189 return EOPNOTSUPP;
bd4539cc 1190 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1191 if (error == 0)
1192 getmicrotime(&ifp->if_lastchange);
f23061d4 1193 return (error);
984263bc
MD
1194
1195 case SIOCSIFMTU:
1196 {
1197 u_long oldmtu = ifp->if_mtu;
1198
dadab5e9 1199 error = suser(td);
984263bc
MD
1200 if (error)
1201 return (error);
1202 if (ifp->if_ioctl == NULL)
1203 return (EOPNOTSUPP);
1204 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1205 return (EINVAL);
bd4539cc 1206 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1207 if (error == 0) {
1208 getmicrotime(&ifp->if_lastchange);
1209 rt_ifmsg(ifp);
1210 }
1211 /*
1212 * If the link MTU changed, do network layer specific procedure.
1213 */
1214 if (ifp->if_mtu != oldmtu) {
1215#ifdef INET6
1216 nd6_setmtu(ifp);
1217#endif
1218 }
1219 return (error);
1220 }
1221
1222 case SIOCADDMULTI:
1223 case SIOCDELMULTI:
dadab5e9 1224 error = suser(td);
984263bc
MD
1225 if (error)
1226 return (error);
1227
1228 /* Don't allow group membership on non-multicast interfaces. */
1229 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1230 return EOPNOTSUPP;
1231
1232 /* Don't let users screw up protocols' entries. */
1233 if (ifr->ifr_addr.sa_family != AF_LINK)
1234 return EINVAL;
1235
1236 if (cmd == SIOCADDMULTI) {
1237 struct ifmultiaddr *ifma;
1238 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1239 } else {
1240 error = if_delmulti(ifp, &ifr->ifr_addr);
1241 }
1242 if (error == 0)
1243 getmicrotime(&ifp->if_lastchange);
1244 return error;
1245
1246 case SIOCSIFPHYADDR:
1247 case SIOCDIFPHYADDR:
1248#ifdef INET6
1249 case SIOCSIFPHYADDR_IN6:
1250#endif
1251 case SIOCSLIFPHYADDR:
1252 case SIOCSIFMEDIA:
1253 case SIOCSIFGENERIC:
dadab5e9 1254 error = suser(td);
984263bc
MD
1255 if (error)
1256 return (error);
1257 if (ifp->if_ioctl == 0)
1258 return (EOPNOTSUPP);
bd4539cc 1259 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1260 if (error == 0)
1261 getmicrotime(&ifp->if_lastchange);
1262 return error;
1263
1264 case SIOCGIFSTATUS:
1265 ifs = (struct ifstat *)data;
1266 ifs->ascii[0] = '\0';
f23061d4 1267
984263bc
MD
1268 case SIOCGIFPSRCADDR:
1269 case SIOCGIFPDSTADDR:
1270 case SIOCGLIFPHYADDR:
1271 case SIOCGIFMEDIA:
1272 case SIOCGIFGENERIC:
1273 if (ifp->if_ioctl == 0)
1274 return (EOPNOTSUPP);
bd4539cc 1275 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
984263bc
MD
1276
1277 case SIOCSIFLLADDR:
dadab5e9 1278 error = suser(td);
984263bc
MD
1279 if (error)
1280 return (error);
1281 return if_setlladdr(ifp,
1282 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1283
1284 default:
1285 oif_flags = ifp->if_flags;
1286 if (so->so_proto == 0)
1287 return (EOPNOTSUPP);
1288#ifndef COMPAT_43
6b6e0885 1289 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1290#else
1291 {
1292 int ocmd = cmd;
1293
1294 switch (cmd) {
1295
1296 case SIOCSIFDSTADDR:
1297 case SIOCSIFADDR:
1298 case SIOCSIFBRDADDR:
1299 case SIOCSIFNETMASK:
1300#if BYTE_ORDER != BIG_ENDIAN
1301 if (ifr->ifr_addr.sa_family == 0 &&
1302 ifr->ifr_addr.sa_len < 16) {
1303 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1304 ifr->ifr_addr.sa_len = 16;
1305 }
1306#else
1307 if (ifr->ifr_addr.sa_len == 0)
1308 ifr->ifr_addr.sa_len = 16;
1309#endif
1310 break;
1311
1312 case OSIOCGIFADDR:
1313 cmd = SIOCGIFADDR;
1314 break;
1315
1316 case OSIOCGIFDSTADDR:
1317 cmd = SIOCGIFDSTADDR;
1318 break;
1319
1320 case OSIOCGIFBRDADDR:
1321 cmd = SIOCGIFBRDADDR;
1322 break;
1323
1324 case OSIOCGIFNETMASK:
1325 cmd = SIOCGIFNETMASK;
1326 }
6b6e0885 1327 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1328 switch (ocmd) {
1329
1330 case OSIOCGIFADDR:
1331 case OSIOCGIFDSTADDR:
1332 case OSIOCGIFBRDADDR:
1333 case OSIOCGIFNETMASK:
1334 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1335
1336 }
1337 }
1338#endif /* COMPAT_43 */
1339
1340 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1341#ifdef INET6
1342 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1343 if (ifp->if_flags & IFF_UP) {
1344 int s = splimp();
1345 in6_if_up(ifp);
1346 splx(s);
1347 }
1348#endif
1349 }
1350 return (error);
1351
1352 }
1353 return (0);
1354}
1355
1356/*
1357 * Set/clear promiscuous mode on interface ifp based on the truth value
1358 * of pswitch. The calls are reference counted so that only the first
1359 * "on" request actually has an effect, as does the final "off" request.
1360 * Results are undefined if the "off" and "on" requests are not matched.
1361 */
1362int
f23061d4 1363ifpromisc(struct ifnet *ifp, int pswitch)
984263bc
MD
1364{
1365 struct ifreq ifr;
1366 int error;
1367 int oldflags;
1368
1369 oldflags = ifp->if_flags;
46f25451 1370 if (ifp->if_flags & IFF_PPROMISC) {
984263bc
MD
1371 /* Do nothing if device is in permanently promiscuous mode */
1372 ifp->if_pcount += pswitch ? 1 : -1;
1373 return (0);
1374 }
1375 if (pswitch) {
1376 /*
1377 * If the device is not configured up, we cannot put it in
1378 * promiscuous mode.
1379 */
1380 if ((ifp->if_flags & IFF_UP) == 0)
1381 return (ENETDOWN);
1382 if (ifp->if_pcount++ != 0)
1383 return (0);
1384 ifp->if_flags |= IFF_PROMISC;
3e4a09e7
MD
1385 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1386 ifp->if_xname);
984263bc
MD
1387 } else {
1388 if (--ifp->if_pcount > 0)
1389 return (0);
1390 ifp->if_flags &= ~IFF_PROMISC;
3e4a09e7
MD
1391 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1392 ifp->if_xname);
984263bc
MD
1393 }
1394 ifr.ifr_flags = ifp->if_flags;
46f25451 1395 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1396 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1397 (struct ucred *)NULL);
984263bc
MD
1398 if (error == 0)
1399 rt_ifmsg(ifp);
1400 else
1401 ifp->if_flags = oldflags;
1402 return error;
1403}
1404
1405/*
1406 * Return interface configuration
1407 * of system. List may be used
1408 * in later ioctl's (above) to get
1409 * other information.
1410 */
984263bc 1411static int
61b8d551 1412ifconf(u_long cmd, caddr_t data, struct thread *td)
984263bc 1413{
41c20dac
MD
1414 struct ifconf *ifc = (struct ifconf *)data;
1415 struct ifnet *ifp;
1416 struct ifaddr *ifa;
984263bc
MD
1417 struct sockaddr *sa;
1418 struct ifreq ifr, *ifrp;
1419 int space = ifc->ifc_len, error = 0;
1420
1421 ifrp = ifc->ifc_req;
1422 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 1423 int addrs;
984263bc 1424
f23061d4 1425 if (space <= sizeof ifr)
984263bc 1426 break;
623c059e
JS
1427
1428 /*
95f018e8
MD
1429 * Zero the stack declared structure first to prevent
1430 * memory disclosure.
623c059e 1431 */
95f018e8 1432 bzero(&ifr, sizeof(ifr));
3e4a09e7
MD
1433 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1434 >= sizeof(ifr.ifr_name)) {
984263bc
MD
1435 error = ENAMETOOLONG;
1436 break;
984263bc
MD
1437 }
1438
1439 addrs = 0;
984263bc 1440 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
f23061d4 1441 if (space <= sizeof ifr)
984263bc
MD
1442 break;
1443 sa = ifa->ifa_addr;
61b8d551
JH
1444 if (td->td_proc->p_ucred->cr_prison &&
1445 prison_if(td, sa))
984263bc
MD
1446 continue;
1447 addrs++;
1448#ifdef COMPAT_43
1449 if (cmd == OSIOCGIFCONF) {
1450 struct osockaddr *osa =
1451 (struct osockaddr *)&ifr.ifr_addr;
1452 ifr.ifr_addr = *sa;
1453 osa->sa_family = sa->sa_family;
f23061d4 1454 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1455 ifrp++;
1456 } else
1457#endif
1458 if (sa->sa_len <= sizeof(*sa)) {
1459 ifr.ifr_addr = *sa;
f23061d4 1460 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1461 ifrp++;
1462 } else {
f23061d4 1463 if (space < (sizeof ifr) + sa->sa_len -
984263bc
MD
1464 sizeof(*sa))
1465 break;
1466 space -= sa->sa_len - sizeof(*sa);
f23061d4
JH
1467 error = copyout(&ifr, ifrp,
1468 sizeof ifr.ifr_name);
984263bc 1469 if (error == 0)
f23061d4
JH
1470 error = copyout(sa, &ifrp->ifr_addr,
1471 sa->sa_len);
984263bc
MD
1472 ifrp = (struct ifreq *)
1473 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1474 }
1475 if (error)
1476 break;
f23061d4 1477 space -= sizeof ifr;
984263bc
MD
1478 }
1479 if (error)
1480 break;
1481 if (!addrs) {
f23061d4
JH
1482 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1483 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1484 if (error)
1485 break;
f23061d4 1486 space -= sizeof ifr;
984263bc
MD
1487 ifrp++;
1488 }
1489 }
1490 ifc->ifc_len -= space;
1491 return (error);
1492}
1493
1494/*
1495 * Just like if_promisc(), but for all-multicast-reception mode.
1496 */
1497int
f23061d4 1498if_allmulti(struct ifnet *ifp, int onswitch)
984263bc
MD
1499{
1500 int error = 0;
1501 int s = splimp();
1502 struct ifreq ifr;
1503
1504 if (onswitch) {
1505 if (ifp->if_amcount++ == 0) {
1506 ifp->if_flags |= IFF_ALLMULTI;
1507 ifr.ifr_flags = ifp->if_flags;
46f25451 1508 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1509 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1510 (struct ucred *)NULL);
984263bc
MD
1511 }
1512 } else {
1513 if (ifp->if_amcount > 1) {
1514 ifp->if_amcount--;
1515 } else {
1516 ifp->if_amcount = 0;
1517 ifp->if_flags &= ~IFF_ALLMULTI;
1518 ifr.ifr_flags = ifp->if_flags;
46f25451 1519 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1520 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1521 (struct ucred *)NULL);
984263bc
MD
1522 }
1523 }
1524 splx(s);
1525
1526 if (error == 0)
1527 rt_ifmsg(ifp);
1528 return error;
1529}
1530
1531/*
1532 * Add a multicast listenership to the interface in question.
1533 * The link layer provides a routine which converts
1534 */
1535int
f23061d4
JH
1536if_addmulti(
1537 struct ifnet *ifp, /* interface to manipulate */
1538 struct sockaddr *sa, /* address to add */
1539 struct ifmultiaddr **retifma)
984263bc
MD
1540{
1541 struct sockaddr *llsa, *dupsa;
1542 int error, s;
1543 struct ifmultiaddr *ifma;
1544
1545 /*
1546 * If the matching multicast address already exists
1547 * then don't add a new one, just add a reference
1548 */
1549 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1550 if (sa_equal(sa, ifma->ifma_addr)) {
984263bc
MD
1551 ifma->ifma_refcount++;
1552 if (retifma)
1553 *retifma = ifma;
1554 return 0;
1555 }
1556 }
1557
1558 /*
1559 * Give the link layer a chance to accept/reject it, and also
1560 * find out which AF_LINK address this maps to, if it isn't one
1561 * already.
1562 */
1563 if (ifp->if_resolvemulti) {
1564 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1565 if (error) return error;
1566 } else {
1567 llsa = 0;
1568 }
1569
1570 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1571 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1572 bcopy(sa, dupsa, sa->sa_len);
1573
1574 ifma->ifma_addr = dupsa;
1575 ifma->ifma_lladdr = llsa;
1576 ifma->ifma_ifp = ifp;
1577 ifma->ifma_refcount = 1;
1578 ifma->ifma_protospec = 0;
1579 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1580
1581 /*
1582 * Some network interfaces can scan the address list at
1583 * interrupt time; lock them out.
1584 */
1585 s = splimp();
1586 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1587 splx(s);
1588 *retifma = ifma;
1589
1590 if (llsa != 0) {
1591 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1592 if (sa_equal(ifma->ifma_addr, llsa))
984263bc
MD
1593 break;
1594 }
1595 if (ifma) {
1596 ifma->ifma_refcount++;
1597 } else {
1598 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1599 M_IFMADDR, M_WAITOK);
1600 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1601 M_IFMADDR, M_WAITOK);
1602 bcopy(llsa, dupsa, llsa->sa_len);
1603 ifma->ifma_addr = dupsa;
1604 ifma->ifma_ifp = ifp;
1605 ifma->ifma_refcount = 1;
1606 s = splimp();
1607 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1608 splx(s);
1609 }
1610 }
1611 /*
1612 * We are certain we have added something, so call down to the
1613 * interface to let them know about it.
1614 */
1615 s = splimp();
bd4539cc 1616 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1617 splx(s);
1618
1619 return 0;
1620}
1621
1622/*
1623 * Remove a reference to a multicast address on this interface. Yell
1624 * if the request does not match an existing membership.
1625 */
1626int
f23061d4 1627if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
984263bc
MD
1628{
1629 struct ifmultiaddr *ifma;
1630 int s;
1631
1632 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1633 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1634 break;
1635 if (ifma == 0)
1636 return ENOENT;
1637
1638 if (ifma->ifma_refcount > 1) {
1639 ifma->ifma_refcount--;
1640 return 0;
1641 }
1642
1643 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1644 sa = ifma->ifma_lladdr;
1645 s = splimp();
1646 LIST_REMOVE(ifma, ifma_link);
1647 /*
1648 * Make sure the interface driver is notified
1649 * in the case of a link layer mcast group being left.
1650 */
1651 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
bd4539cc 1652 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1653 splx(s);
1654 free(ifma->ifma_addr, M_IFMADDR);
1655 free(ifma, M_IFMADDR);
1656 if (sa == 0)
1657 return 0;
1658
1659 /*
1660 * Now look for the link-layer address which corresponds to
1661 * this network address. It had been squirreled away in
1662 * ifma->ifma_lladdr for this purpose (so we don't have
1663 * to call ifp->if_resolvemulti() again), and we saved that
1664 * value in sa above. If some nasty deleted the
1665 * link-layer address out from underneath us, we can deal because
1666 * the address we stored was is not the same as the one which was
1667 * in the record for the link-layer address. (So we don't complain
1668 * in that case.)
1669 */
1670 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1671 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1672 break;
1673 if (ifma == 0)
1674 return 0;
1675
1676 if (ifma->ifma_refcount > 1) {
1677 ifma->ifma_refcount--;
1678 return 0;
1679 }
1680
1681 s = splimp();
1682 LIST_REMOVE(ifma, ifma_link);
bd4539cc 1683 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1684 splx(s);
1685 free(ifma->ifma_addr, M_IFMADDR);
1686 free(sa, M_IFMADDR);
1687 free(ifma, M_IFMADDR);
1688
1689 return 0;
1690}
1691
1692/*
1693 * Set the link layer address on an interface.
1694 *
1695 * At this time we only support certain types of interfaces,
1696 * and we don't allow the length of the address to change.
1697 */
1698int
1699if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1700{
1701 struct sockaddr_dl *sdl;
1702 struct ifaddr *ifa;
1703 struct ifreq ifr;
1704
1705 ifa = ifnet_addrs[ifp->if_index - 1];
1706 if (ifa == NULL)
1707 return (EINVAL);
1708 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1709 if (sdl == NULL)
1710 return (EINVAL);
1711 if (len != sdl->sdl_alen) /* don't allow length to change */
1712 return (EINVAL);
1713 switch (ifp->if_type) {
1714 case IFT_ETHER: /* these types use struct arpcom */
1715 case IFT_FDDI:
1716 case IFT_XETHER:
1717 case IFT_ISO88025:
1718 case IFT_L2VLAN:
1719 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1720 /* FALLTHROUGH */
1721 case IFT_ARCNET:
1722 bcopy(lladdr, LLADDR(sdl), len);
1723 break;
1724 default:
1725 return (ENODEV);
1726 }
1727 /*
1728 * If the interface is already up, we need
1729 * to re-init it in order to reprogram its
1730 * address filter.
1731 */
1732 if ((ifp->if_flags & IFF_UP) != 0) {
1733 ifp->if_flags &= ~IFF_UP;
1734 ifr.ifr_flags = ifp->if_flags;
46f25451 1735 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1736 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1737 (struct ucred *)NULL);
984263bc
MD
1738 ifp->if_flags |= IFF_UP;
1739 ifr.ifr_flags = ifp->if_flags;
46f25451 1740 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1741 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1742 (struct ucred *)NULL);
984263bc
MD
1743#ifdef INET
1744 /*
1745 * Also send gratuitous ARPs to notify other nodes about
1746 * the address change.
1747 */
1748 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1749 if (ifa->ifa_addr != NULL &&
1750 ifa->ifa_addr->sa_family == AF_INET)
1751 arp_ifinit(ifp, ifa);
1752 }
1753#endif
1754 }
1755 return (0);
1756}
1757
1758struct ifmultiaddr *
f23061d4 1759ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
984263bc
MD
1760{
1761 struct ifmultiaddr *ifma;
1762
1763 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1764 if (sa_equal(ifma->ifma_addr, sa))
984263bc
MD
1765 break;
1766
1767 return ifma;
1768}
1769
1550dfd9
MD
1770/*
1771 * The name argument must be a pointer to storage which will last as
1772 * long as the interface does. For physical devices, the result of
1773 * device_get_name(dev) is a good choice and for pseudo-devices a
1774 * static string works well.
1775 */
1776void
1777if_initname(struct ifnet *ifp, const char *name, int unit)
1778{
3e4a09e7
MD
1779 ifp->if_dname = name;
1780 ifp->if_dunit = unit;
1550dfd9
MD
1781 if (unit != IF_DUNIT_NONE)
1782 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1783 else
1784 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1785}
1786
984263bc
MD
1787int
1788if_printf(struct ifnet *ifp, const char *fmt, ...)
1789{
e2565a42 1790 __va_list ap;
984263bc
MD
1791 int retval;
1792
3e4a09e7 1793 retval = printf("%s: ", ifp->if_xname);
e2565a42 1794 __va_start(ap, fmt);
984263bc 1795 retval += vprintf(fmt, ap);
e2565a42 1796 __va_end(ap);
984263bc
MD
1797 return (retval);
1798}
1799
1800SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1801SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
e3e4574a 1802
b2f93efe
JS
1803void
1804ifq_set_classic(struct ifaltq *ifq)
1805{
1806 ifq->altq_enqueue = ifq_classic_enqueue;
1807 ifq->altq_dequeue = ifq_classic_dequeue;
1808 ifq->altq_request = ifq_classic_request;
1809}
1810
e3e4574a
JS
1811static int
1812ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1813 struct altq_pktattr *pa __unused)
1814{
1815 if (IF_QFULL(ifq)) {
1816 m_freem(m);
1817 return(ENOBUFS);
1818 } else {
1819 IF_ENQUEUE(ifq, m);
1820 return(0);
1821 }
1822}
1823
1824static struct mbuf *
1825ifq_classic_dequeue(struct ifaltq *ifq, int op)
1826{
1827 struct mbuf *m;
1828
1829 switch (op) {
1830 case ALTDQ_POLL:
1831 IF_POLL(ifq, m);
1832 break;
1833 case ALTDQ_REMOVE:
1834 IF_DEQUEUE(ifq, m);
1835 break;
1836 default:
1837 panic("unsupported ALTQ dequeue op: %d", op);
1838 }
1839
1840 return(m);
1841}
1842
1843static int
1844ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1845{
1846 switch (req) {
1847 case ALTRQ_PURGE:
1848 IF_DRAIN(ifq);
1849 break;
1850 default:
1851 panic("unspported ALTQ request: %d", req);
1852 }
1853
1854 return(0);
1855}