if_clone_event should take a struct if_clone *, not a struct ifnet *.
[dragonfly.git] / sys / net / if.c
CommitLineData
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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
1fdf0954 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
75857e7c 35 * $DragonFly: src/sys/net/if.c,v 1.21 2004/09/13 23:45:57 drhodus Exp $
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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>
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48#include <sys/socket.h>
49#include <sys/socketvar.h>
6b6e0885 50#include <sys/socketops.h>
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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>
56
57#include <net/if.h>
58#include <net/if_arp.h>
59#include <net/if_dl.h>
60#include <net/if_types.h>
61#include <net/if_var.h>
62#include <net/radix.h>
63#include <net/route.h>
64#include <machine/stdarg.h>
65
66#if defined(INET) || defined(INET6)
67/*XXX*/
68#include <netinet/in.h>
69#include <netinet/in_var.h>
70#include <netinet/if_ether.h>
71#ifdef INET6
72#include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
73#include <netinet6/in6_var.h>
74#include <netinet6/in6_ifattach.h>
75#endif
76#endif
77
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78#if defined(COMPAT_43)
79#include <emulation/43bsd/43bsd_socket.h>
80#endif /* COMPAT_43 */
81
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82/*
83 * System initialization
84 */
85
61b8d551 86static int ifconf (u_long, caddr_t, struct thread *);
158abb01
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87static void ifinit (void *);
88static void if_qflush (struct ifqueue *);
89static void if_slowtimo (void *);
90static void link_rtrequest (int, struct rtentry *, struct rt_addrinfo *);
91static int if_rtdel (struct radix_node *, void *);
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92
93SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
94
95MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
96MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
b7b982e2 97MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
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98
99int ifqmaxlen = IFQ_MAXLEN;
100struct ifnethead ifnet; /* depend on static init XXX */
101
102#ifdef INET6
103/*
104 * XXX: declare here to avoid to include many inet6 related files..
105 * should be more generalized?
106 */
158abb01 107extern void nd6_setmtu (struct ifnet *);
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108#endif
109
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110struct if_clone *if_clone_lookup (const char *, int *);
111int if_clone_list (struct if_clonereq *);
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112
113LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
114int if_cloners_count;
115
116/*
117 * Network interface utility routines.
118 *
119 * Routines with ifa_ifwith* names take sockaddr *'s as
120 * parameters.
121 */
122/* ARGSUSED*/
123void
124ifinit(dummy)
125 void *dummy;
126{
127 struct ifnet *ifp;
128 int s;
129
130 s = splimp();
131 TAILQ_FOREACH(ifp, &ifnet, if_link) {
132 if (ifp->if_snd.ifq_maxlen == 0) {
3e4a09e7 133 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
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134 ifp->if_snd.ifq_maxlen = ifqmaxlen;
135 }
136 }
137 splx(s);
138 if_slowtimo(0);
139}
140
141int if_index = 0;
142struct ifaddr **ifnet_addrs;
143struct ifnet **ifindex2ifnet = NULL;
144
145
146/*
147 * Attach an interface to the
148 * list of "active" interfaces.
149 */
150void
151if_attach(ifp)
152 struct ifnet *ifp;
153{
154 unsigned socksize, ifasize;
155 int namelen, masklen;
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156 struct sockaddr_dl *sdl;
157 struct ifaddr *ifa;
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158 static int if_indexlim = 8;
159 static int inited;
160
161 if (!inited) {
162 TAILQ_INIT(&ifnet);
163 inited = 1;
164 }
165
166 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
167 ifp->if_index = ++if_index;
168 /*
169 * XXX -
170 * The old code would work if the interface passed a pre-existing
171 * chain of ifaddrs to this code. We don't trust our callers to
172 * properly initialize the tailq, however, so we no longer allow
173 * this unlikely case.
174 */
175 TAILQ_INIT(&ifp->if_addrhead);
176 TAILQ_INIT(&ifp->if_prefixhead);
177 LIST_INIT(&ifp->if_multiaddrs);
178 getmicrotime(&ifp->if_lastchange);
179 if (ifnet_addrs == 0 || if_index >= if_indexlim) {
180 unsigned n = (if_indexlim <<= 1) * sizeof(ifa);
181 caddr_t q = malloc(n, M_IFADDR, M_WAITOK);
182 bzero(q, n);
183 if (ifnet_addrs) {
184 bcopy((caddr_t)ifnet_addrs, (caddr_t)q, n/2);
185 free((caddr_t)ifnet_addrs, M_IFADDR);
186 }
187 ifnet_addrs = (struct ifaddr **)q;
188
189 /* grow ifindex2ifnet */
190 n = if_indexlim * sizeof(struct ifnet *);
191 q = malloc(n, M_IFADDR, M_WAITOK);
192 bzero(q, n);
193 if (ifindex2ifnet) {
194 bcopy((caddr_t)ifindex2ifnet, q, n/2);
195 free((caddr_t)ifindex2ifnet, M_IFADDR);
196 }
197 ifindex2ifnet = (struct ifnet **)q;
198 }
199
200 ifindex2ifnet[if_index] = ifp;
201
202 /*
203 * create a Link Level name for this device
204 */
3e4a09e7 205 namelen = strlen(ifp->if_xname);
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206#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
207 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
208 socksize = masklen + ifp->if_addrlen;
209#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
210 if (socksize < sizeof(*sdl))
211 socksize = sizeof(*sdl);
212 socksize = ROUNDUP(socksize);
213 ifasize = sizeof(*ifa) + 2 * socksize;
214 ifa = (struct ifaddr *)malloc(ifasize, M_IFADDR, M_WAITOK);
215 if (ifa) {
216 bzero((caddr_t)ifa, ifasize);
217 sdl = (struct sockaddr_dl *)(ifa + 1);
218 sdl->sdl_len = socksize;
219 sdl->sdl_family = AF_LINK;
3e4a09e7 220 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
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221 sdl->sdl_nlen = namelen;
222 sdl->sdl_index = ifp->if_index;
223 sdl->sdl_type = ifp->if_type;
224 ifnet_addrs[if_index - 1] = ifa;
225 ifa->ifa_ifp = ifp;
226 ifa->ifa_rtrequest = link_rtrequest;
227 ifa->ifa_addr = (struct sockaddr *)sdl;
228 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
229 ifa->ifa_netmask = (struct sockaddr *)sdl;
230 sdl->sdl_len = masklen;
231 while (namelen != 0)
232 sdl->sdl_data[--namelen] = 0xff;
233 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
234 }
235
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236 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
237
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238 /* Announce the interface. */
239 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
240}
241
242/*
243 * Detach an interface, removing it from the
244 * list of "active" interfaces.
245 */
246void
247if_detach(ifp)
248 struct ifnet *ifp;
249{
250 struct ifaddr *ifa;
251 struct radix_node_head *rnh;
252 int s;
253 int i;
254
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255 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
256
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257 /*
258 * Remove routes and flush queues.
259 */
260 s = splnet();
261 if_down(ifp);
262
263 /*
264 * Remove address from ifnet_addrs[] and maybe decrement if_index.
265 * Clean up all addresses.
266 */
267 ifnet_addrs[ifp->if_index - 1] = 0;
268 while (if_index > 0 && ifnet_addrs[if_index - 1] == 0)
269 if_index--;
270
271 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
272 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
273#ifdef INET
274 /* XXX: Ugly!! ad hoc just for INET */
275 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
276 struct ifaliasreq ifr;
277
278 bzero(&ifr, sizeof(ifr));
279 ifr.ifra_addr = *ifa->ifa_addr;
280 if (ifa->ifa_dstaddr)
281 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
282 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
283 NULL) == 0)
284 continue;
285 }
286#endif /* INET */
287#ifdef INET6
288 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
289 in6_purgeaddr(ifa);
290 /* ifp_addrhead is already updated */
291 continue;
292 }
293#endif /* INET6 */
294 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
295 IFAFREE(ifa);
296 }
297
298#ifdef INET6
299 /*
300 * Remove all IPv6 kernel structs related to ifp. This should be done
301 * before removing routing entries below, since IPv6 interface direct
302 * routes are expected to be removed by the IPv6-specific kernel API.
303 * Otherwise, the kernel will detect some inconsistency and bark it.
304 */
305 in6_ifdetach(ifp);
306#endif
307
308 /*
309 * Delete all remaining routes using this interface
310 * Unfortuneatly the only way to do this is to slog through
311 * the entire routing table looking for routes which point
312 * to this interface...oh well...
313 */
314 for (i = 1; i <= AF_MAX; i++) {
315 if ((rnh = rt_tables[i]) == NULL)
316 continue;
317 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
318 }
319
320 /* Announce that the interface is gone. */
321 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
322
75857e7c
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323 ifindex2ifnet[ifp->if_index] = NULL;
324
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325 TAILQ_REMOVE(&ifnet, ifp, if_link);
326 splx(s);
327}
328
329/*
330 * Delete Routes for a Network Interface
331 *
332 * Called for each routing entry via the rnh->rnh_walktree() call above
333 * to delete all route entries referencing a detaching network interface.
334 *
335 * Arguments:
336 * rn pointer to node in the routing table
337 * arg argument passed to rnh->rnh_walktree() - detaching interface
338 *
339 * Returns:
340 * 0 successful
341 * errno failed - reason indicated
342 *
343 */
344static int
345if_rtdel(rn, arg)
346 struct radix_node *rn;
347 void *arg;
348{
349 struct rtentry *rt = (struct rtentry *)rn;
350 struct ifnet *ifp = arg;
351 int err;
352
353 if (rt->rt_ifp == ifp) {
354
355 /*
356 * Protect (sorta) against walktree recursion problems
357 * with cloned routes
358 */
359 if ((rt->rt_flags & RTF_UP) == 0)
360 return (0);
361
362 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
363 rt_mask(rt), rt->rt_flags,
364 (struct rtentry **) NULL);
365 if (err) {
366 log(LOG_WARNING, "if_rtdel: error %d\n", err);
367 }
368 }
369
370 return (0);
371}
372
373/*
374 * Create a clone network interface.
375 */
376int
377if_clone_create(name, len)
378 char *name;
379 int len;
380{
381 struct if_clone *ifc;
382 char *dp;
b7b982e2 383 int wildcard, bytoff, bitoff;
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384 int unit;
385 int err;
386
387 ifc = if_clone_lookup(name, &unit);
388 if (ifc == NULL)
389 return (EINVAL);
390
391 if (ifunit(name) != NULL)
392 return (EEXIST);
393
b7b982e2 394 bytoff = bitoff = 0;
984263bc 395 wildcard = (unit < 0);
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MD
396 /*
397 * Find a free unit if none was given.
398 */
399 if (wildcard) {
400 while ((bytoff < ifc->ifc_bmlen)
401 && (ifc->ifc_units[bytoff] == 0xff))
402 bytoff++;
403 if (bytoff >= ifc->ifc_bmlen)
404 return (ENOSPC);
405 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
406 bitoff++;
407 unit = (bytoff << 3) + bitoff;
408 }
984263bc 409
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MD
410 if (unit > ifc->ifc_maxunit)
411 return (ENXIO);
412
413 err = (*ifc->ifc_create)(ifc, unit);
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414 if (err != 0)
415 return (err);
416
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MD
417 if (!wildcard) {
418 bytoff = unit >> 3;
419 bitoff = unit - (bytoff << 3);
420 }
421
422 /*
423 * Allocate the unit in the bitmap.
424 */
425 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
426 ("%s: bit is already set", __func__));
427 ifc->ifc_units[bytoff] |= (1 << bitoff);
428
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429 /* In the wildcard case, we need to update the name. */
430 if (wildcard) {
431 for (dp = name; *dp != '\0'; dp++);
432 if (snprintf(dp, len - (dp-name), "%d", unit) >
433 len - (dp-name) - 1) {
434 /*
435 * This can only be a programmer error and
436 * there's no straightforward way to recover if
437 * it happens.
438 */
439 panic("if_clone_create(): interface name too long");
440 }
b7b982e2 441
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442 }
443
f2bd8b67
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444 EVENTHANDLER_INVOKE(if_clone_event, ifc);
445
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446 return (0);
447}
448
449/*
450 * Destroy a clone network interface.
451 */
452int
453if_clone_destroy(name)
454 const char *name;
455{
456 struct if_clone *ifc;
457 struct ifnet *ifp;
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MD
458 int bytoff, bitoff;
459 int unit;
984263bc 460
b7b982e2 461 ifc = if_clone_lookup(name, &unit);
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462 if (ifc == NULL)
463 return (EINVAL);
464
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MD
465 if (unit < ifc->ifc_minifs)
466 return (EINVAL);
467
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468 ifp = ifunit(name);
469 if (ifp == NULL)
470 return (ENXIO);
471
472 if (ifc->ifc_destroy == NULL)
473 return (EOPNOTSUPP);
474
475 (*ifc->ifc_destroy)(ifp);
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MD
476
477 /*
478 * Compute offset in the bitmap and deallocate the unit.
479 */
480 bytoff = unit >> 3;
481 bitoff = unit - (bytoff << 3);
482 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
483 ("%s: bit is already cleared", __func__));
484 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
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485 return (0);
486}
487
488/*
489 * Look up a network interface cloner.
490 */
491struct if_clone *
492if_clone_lookup(name, unitp)
493 const char *name;
494 int *unitp;
495{
496 struct if_clone *ifc;
497 const char *cp;
498 int i;
499
500 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
501 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
502 if (ifc->ifc_name[i] != *cp)
503 goto next_ifc;
504 }
505 goto found_name;
506 next_ifc:
507 ifc = LIST_NEXT(ifc, ifc_list);
508 }
509
510 /* No match. */
511 return ((struct if_clone *)NULL);
512
513 found_name:
514 if (*cp == '\0') {
515 i = -1;
516 } else {
517 for (i = 0; *cp != '\0'; cp++) {
518 if (*cp < '0' || *cp > '9') {
519 /* Bogus unit number. */
520 return (NULL);
521 }
522 i = (i * 10) + (*cp - '0');
523 }
524 }
525
526 if (unitp != NULL)
527 *unitp = i;
528 return (ifc);
529}
530
531/*
532 * Register a network interface cloner.
533 */
534void
535if_clone_attach(ifc)
536 struct if_clone *ifc;
537{
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538 int bytoff, bitoff;
539 int err;
540 int len, maxclone;
541 int unit;
542
543 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
544 ("%s: %s requested more units then allowed (%d > %d)",
545 __func__, ifc->ifc_name, ifc->ifc_minifs,
546 ifc->ifc_maxunit + 1));
547 /*
548 * Compute bitmap size and allocate it.
549 */
550 maxclone = ifc->ifc_maxunit + 1;
551 len = maxclone >> 3;
552 if ((len << 3) < maxclone)
553 len++;
554 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
555 ifc->ifc_bmlen = len;
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556
557 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
558 if_cloners_count++;
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559
560 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
561 err = (*ifc->ifc_create)(ifc, unit);
562 KASSERT(err == 0,
563 ("%s: failed to create required interface %s%d",
564 __func__, ifc->ifc_name, unit));
565
566 /* Allocate the unit in the bitmap. */
567 bytoff = unit >> 3;
568 bitoff = unit - (bytoff << 3);
569 ifc->ifc_units[bytoff] |= (1 << bitoff);
570 }
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571}
572
573/*
574 * Unregister a network interface cloner.
575 */
576void
577if_clone_detach(ifc)
578 struct if_clone *ifc;
579{
580
581 LIST_REMOVE(ifc, ifc_list);
b7b982e2 582 free(ifc->ifc_units, M_CLONE);
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583 if_cloners_count--;
584}
585
586/*
587 * Provide list of interface cloners to userspace.
588 */
589int
590if_clone_list(ifcr)
591 struct if_clonereq *ifcr;
592{
593 char outbuf[IFNAMSIZ], *dst;
594 struct if_clone *ifc;
595 int count, error = 0;
596
597 ifcr->ifcr_total = if_cloners_count;
598 if ((dst = ifcr->ifcr_buffer) == NULL) {
599 /* Just asking how many there are. */
600 return (0);
601 }
602
603 if (ifcr->ifcr_count < 0)
604 return (EINVAL);
605
606 count = (if_cloners_count < ifcr->ifcr_count) ?
607 if_cloners_count : ifcr->ifcr_count;
608
609 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
610 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
3e4a09e7 611 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
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612 error = copyout(outbuf, dst, IFNAMSIZ);
613 if (error)
614 break;
615 }
616
617 return (error);
618}
619
620/*
621 * Locate an interface based on a complete address.
622 */
623/*ARGSUSED*/
624struct ifaddr *
625ifa_ifwithaddr(addr)
82ed7fc2 626 struct sockaddr *addr;
984263bc 627{
82ed7fc2
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628 struct ifnet *ifp;
629 struct ifaddr *ifa;
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630
631#define equal(a1, a2) \
632 (bcmp((caddr_t)(a1), (caddr_t)(a2), ((struct sockaddr *)(a1))->sa_len) == 0)
633 TAILQ_FOREACH(ifp, &ifnet, if_link)
634 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
635 if (ifa->ifa_addr->sa_family != addr->sa_family)
636 continue;
637 if (equal(addr, ifa->ifa_addr))
638 return (ifa);
639 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
640 /* IP6 doesn't have broadcast */
641 ifa->ifa_broadaddr->sa_len != 0 &&
642 equal(ifa->ifa_broadaddr, addr))
643 return (ifa);
644 }
645 return ((struct ifaddr *)0);
646}
647/*
648 * Locate the point to point interface with a given destination address.
649 */
650/*ARGSUSED*/
651struct ifaddr *
652ifa_ifwithdstaddr(addr)
82ed7fc2 653 struct sockaddr *addr;
984263bc 654{
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655 struct ifnet *ifp;
656 struct ifaddr *ifa;
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657
658 TAILQ_FOREACH(ifp, &ifnet, if_link)
659 if (ifp->if_flags & IFF_POINTOPOINT)
660 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
661 if (ifa->ifa_addr->sa_family != addr->sa_family)
662 continue;
663 if (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr))
664 return (ifa);
665 }
666 return ((struct ifaddr *)0);
667}
668
669/*
670 * Find an interface on a specific network. If many, choice
671 * is most specific found.
672 */
673struct ifaddr *
674ifa_ifwithnet(addr)
675 struct sockaddr *addr;
676{
82ed7fc2
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677 struct ifnet *ifp;
678 struct ifaddr *ifa;
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679 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
680 u_int af = addr->sa_family;
681 char *addr_data = addr->sa_data, *cplim;
682
683 /*
684 * AF_LINK addresses can be looked up directly by their index number,
685 * so do that if we can.
686 */
687 if (af == AF_LINK) {
82ed7fc2 688 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
984263bc
MD
689 if (sdl->sdl_index && sdl->sdl_index <= if_index)
690 return (ifnet_addrs[sdl->sdl_index - 1]);
691 }
692
693 /*
694 * Scan though each interface, looking for ones that have
695 * addresses in this address family.
696 */
697 TAILQ_FOREACH(ifp, &ifnet, if_link) {
698 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
82ed7fc2 699 char *cp, *cp2, *cp3;
984263bc
MD
700
701 if (ifa->ifa_addr->sa_family != af)
702next: continue;
703 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
704 /*
705 * This is a bit broken as it doesn't
706 * take into account that the remote end may
707 * be a single node in the network we are
708 * looking for.
709 * The trouble is that we don't know the
710 * netmask for the remote end.
711 */
712 if (ifa->ifa_dstaddr != 0
713 && equal(addr, ifa->ifa_dstaddr))
714 return (ifa);
715 } else {
716 /*
717 * if we have a special address handler,
718 * then use it instead of the generic one.
719 */
720 if (ifa->ifa_claim_addr) {
721 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
722 return (ifa);
723 } else {
724 continue;
725 }
726 }
727
728 /*
729 * Scan all the bits in the ifa's address.
730 * If a bit dissagrees with what we are
731 * looking for, mask it with the netmask
732 * to see if it really matters.
733 * (A byte at a time)
734 */
735 if (ifa->ifa_netmask == 0)
736 continue;
737 cp = addr_data;
738 cp2 = ifa->ifa_addr->sa_data;
739 cp3 = ifa->ifa_netmask->sa_data;
740 cplim = ifa->ifa_netmask->sa_len
741 + (char *)ifa->ifa_netmask;
742 while (cp3 < cplim)
743 if ((*cp++ ^ *cp2++) & *cp3++)
744 goto next; /* next address! */
745 /*
746 * If the netmask of what we just found
747 * is more specific than what we had before
748 * (if we had one) then remember the new one
749 * before continuing to search
750 * for an even better one.
751 */
752 if (ifa_maybe == 0 ||
753 rn_refines((caddr_t)ifa->ifa_netmask,
754 (caddr_t)ifa_maybe->ifa_netmask))
755 ifa_maybe = ifa;
756 }
757 }
758 }
759 return (ifa_maybe);
760}
761
762/*
763 * Find an interface address specific to an interface best matching
764 * a given address.
765 */
766struct ifaddr *
767ifaof_ifpforaddr(addr, ifp)
768 struct sockaddr *addr;
82ed7fc2 769 struct ifnet *ifp;
984263bc 770{
82ed7fc2
RG
771 struct ifaddr *ifa;
772 char *cp, *cp2, *cp3;
773 char *cplim;
984263bc
MD
774 struct ifaddr *ifa_maybe = 0;
775 u_int af = addr->sa_family;
776
777 if (af >= AF_MAX)
778 return (0);
779 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
780 if (ifa->ifa_addr->sa_family != af)
781 continue;
782 if (ifa_maybe == 0)
783 ifa_maybe = ifa;
784 if (ifa->ifa_netmask == 0) {
785 if (equal(addr, ifa->ifa_addr) ||
786 (ifa->ifa_dstaddr && equal(addr, ifa->ifa_dstaddr)))
787 return (ifa);
788 continue;
789 }
790 if (ifp->if_flags & IFF_POINTOPOINT) {
791 if (equal(addr, ifa->ifa_dstaddr))
792 return (ifa);
793 } else {
794 cp = addr->sa_data;
795 cp2 = ifa->ifa_addr->sa_data;
796 cp3 = ifa->ifa_netmask->sa_data;
797 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
798 for (; cp3 < cplim; cp3++)
799 if ((*cp++ ^ *cp2++) & *cp3)
800 break;
801 if (cp3 == cplim)
802 return (ifa);
803 }
804 }
805 return (ifa_maybe);
806}
807
808#include <net/route.h>
809
810/*
811 * Default action when installing a route with a Link Level gateway.
812 * Lookup an appropriate real ifa to point to.
813 * This should be moved to /sys/net/link.c eventually.
814 */
815static void
816link_rtrequest(cmd, rt, info)
817 int cmd;
82ed7fc2 818 struct rtentry *rt;
984263bc
MD
819 struct rt_addrinfo *info;
820{
82ed7fc2 821 struct ifaddr *ifa;
984263bc
MD
822 struct sockaddr *dst;
823 struct ifnet *ifp;
824
825 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
826 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
827 return;
828 ifa = ifaof_ifpforaddr(dst, ifp);
829 if (ifa) {
830 IFAFREE(rt->rt_ifa);
831 rt->rt_ifa = ifa;
832 ifa->ifa_refcnt++;
833 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
834 ifa->ifa_rtrequest(cmd, rt, info);
835 }
836}
837
838/*
839 * Mark an interface down and notify protocols of
840 * the transition.
841 * NOTE: must be called at splnet or eqivalent.
842 */
843void
844if_unroute(ifp, flag, fam)
82ed7fc2 845 struct ifnet *ifp;
984263bc
MD
846 int flag, fam;
847{
82ed7fc2 848 struct ifaddr *ifa;
984263bc
MD
849
850 ifp->if_flags &= ~flag;
851 getmicrotime(&ifp->if_lastchange);
852 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
853 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
854 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
855 if_qflush(&ifp->if_snd);
856 rt_ifmsg(ifp);
857}
858
859/*
860 * Mark an interface up and notify protocols of
861 * the transition.
862 * NOTE: must be called at splnet or eqivalent.
863 */
864void
865if_route(ifp, flag, fam)
82ed7fc2 866 struct ifnet *ifp;
984263bc
MD
867 int flag, fam;
868{
82ed7fc2 869 struct ifaddr *ifa;
984263bc
MD
870
871 ifp->if_flags |= flag;
872 getmicrotime(&ifp->if_lastchange);
873 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
874 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
875 pfctlinput(PRC_IFUP, ifa->ifa_addr);
876 rt_ifmsg(ifp);
877#ifdef INET6
878 in6_if_up(ifp);
879#endif
880}
881
882/*
883 * Mark an interface down and notify protocols of
884 * the transition.
885 * NOTE: must be called at splnet or eqivalent.
886 */
887void
888if_down(ifp)
82ed7fc2 889 struct ifnet *ifp;
984263bc
MD
890{
891
892 if_unroute(ifp, IFF_UP, AF_UNSPEC);
893}
894
895/*
896 * Mark an interface up and notify protocols of
897 * the transition.
898 * NOTE: must be called at splnet or eqivalent.
899 */
900void
901if_up(ifp)
82ed7fc2 902 struct ifnet *ifp;
984263bc
MD
903{
904
905 if_route(ifp, IFF_UP, AF_UNSPEC);
906}
907
908/*
909 * Flush an interface queue.
910 */
911static void
912if_qflush(ifq)
82ed7fc2 913 struct ifqueue *ifq;
984263bc 914{
82ed7fc2 915 struct mbuf *m, *n;
984263bc
MD
916
917 n = ifq->ifq_head;
918 while ((m = n) != 0) {
9a275e74 919 n = m->m_nextpkt;
984263bc
MD
920 m_freem(m);
921 }
922 ifq->ifq_head = 0;
923 ifq->ifq_tail = 0;
924 ifq->ifq_len = 0;
925}
926
927/*
928 * Handle interface watchdog timer routines. Called
929 * from softclock, we decrement timers (if set) and
930 * call the appropriate interface routine on expiration.
931 */
932static void
933if_slowtimo(arg)
934 void *arg;
935{
82ed7fc2 936 struct ifnet *ifp;
984263bc
MD
937 int s = splimp();
938
939 TAILQ_FOREACH(ifp, &ifnet, if_link) {
940 if (ifp->if_timer == 0 || --ifp->if_timer)
941 continue;
942 if (ifp->if_watchdog)
943 (*ifp->if_watchdog)(ifp);
944 }
945 splx(s);
946 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
947}
948
949/*
950 * Map interface name to
951 * interface structure pointer.
952 */
953struct ifnet *
954ifunit(const char *name)
955{
984263bc 956 struct ifnet *ifp;
984263bc 957
984263bc 958 /*
3e4a09e7 959 * Search all the interfaces for this name/number
984263bc 960 */
3e4a09e7 961
984263bc 962 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 963 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
984263bc
MD
964 break;
965 }
966 return (ifp);
967}
968
969
970/*
971 * Map interface name in a sockaddr_dl to
972 * interface structure pointer.
973 */
974struct ifnet *
975if_withname(sa)
976 struct sockaddr *sa;
977{
978 char ifname[IFNAMSIZ+1];
979 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
980
981 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
982 (sdl->sdl_nlen > IFNAMSIZ) )
983 return NULL;
984
985 /*
986 * ifunit wants a null-terminated name. It may not be null-terminated
987 * in the sockaddr. We don't want to change the caller's sockaddr,
988 * and there might not be room to put the trailing null anyway, so we
989 * make a local copy that we know we can null terminate safely.
990 */
991
992 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
993 ifname[sdl->sdl_nlen] = '\0';
994 return ifunit(ifname);
995}
996
997
998/*
999 * Interface ioctls.
1000 */
1001int
dadab5e9 1002ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
984263bc 1003{
41c20dac
MD
1004 struct ifnet *ifp;
1005 struct ifreq *ifr;
984263bc
MD
1006 struct ifstat *ifs;
1007 int error;
1008 short oif_flags;
1009 int new_flags;
1fdf0954
HP
1010 size_t namelen, onamelen;
1011 char new_name[IFNAMSIZ];
1012 struct ifaddr *ifa;
1013 struct sockaddr_dl *sdl;
984263bc
MD
1014
1015 switch (cmd) {
1016
1017 case SIOCGIFCONF:
1018 case OSIOCGIFCONF:
61b8d551 1019 return (ifconf(cmd, data, td));
984263bc
MD
1020 }
1021 ifr = (struct ifreq *)data;
1022
1023 switch (cmd) {
1024 case SIOCIFCREATE:
1025 case SIOCIFDESTROY:
dadab5e9 1026 if ((error = suser(td)) != 0)
984263bc
MD
1027 return (error);
1028 return ((cmd == SIOCIFCREATE) ?
1029 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1030 if_clone_destroy(ifr->ifr_name));
1031
1032 case SIOCIFGCLONERS:
1033 return (if_clone_list((struct if_clonereq *)data));
1034 }
1035
1036 ifp = ifunit(ifr->ifr_name);
1037 if (ifp == 0)
1038 return (ENXIO);
1039 switch (cmd) {
1040
1041 case SIOCGIFFLAGS:
1042 ifr->ifr_flags = ifp->if_flags;
46f25451 1043 ifr->ifr_flagshigh = ifp->if_flags >> 16;
984263bc
MD
1044 break;
1045
1046 case SIOCGIFCAP:
1047 ifr->ifr_reqcap = ifp->if_capabilities;
1048 ifr->ifr_curcap = ifp->if_capenable;
1049 break;
1050
1051 case SIOCGIFMETRIC:
1052 ifr->ifr_metric = ifp->if_metric;
1053 break;
1054
1055 case SIOCGIFMTU:
1056 ifr->ifr_mtu = ifp->if_mtu;
1057 break;
1058
1059 case SIOCGIFPHYS:
1060 ifr->ifr_phys = ifp->if_physical;
1061 break;
1062
1063 case SIOCSIFFLAGS:
dadab5e9 1064 error = suser(td);
984263bc
MD
1065 if (error)
1066 return (error);
1067 new_flags = (ifr->ifr_flags & 0xffff) |
1068 (ifr->ifr_flagshigh << 16);
1069 if (ifp->if_flags & IFF_SMART) {
1070 /* Smart drivers twiddle their own routes */
1071 } else if (ifp->if_flags & IFF_UP &&
1072 (new_flags & IFF_UP) == 0) {
1073 int s = splimp();
1074 if_down(ifp);
1075 splx(s);
1076 } else if (new_flags & IFF_UP &&
1077 (ifp->if_flags & IFF_UP) == 0) {
1078 int s = splimp();
1079 if_up(ifp);
1080 splx(s);
1081 }
1082 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1083 (new_flags &~ IFF_CANTCHANGE);
984263bc
MD
1084 if (new_flags & IFF_PPROMISC) {
1085 /* Permanently promiscuous mode requested */
1086 ifp->if_flags |= IFF_PROMISC;
1087 } else if (ifp->if_pcount == 0) {
1088 ifp->if_flags &= ~IFF_PROMISC;
1089 }
1090 if (ifp->if_ioctl)
bd4539cc
JH
1091 (void) (*ifp->if_ioctl)(ifp, cmd, data,
1092 td->td_proc->p_ucred);
984263bc
MD
1093 getmicrotime(&ifp->if_lastchange);
1094 break;
1095
1096 case SIOCSIFCAP:
dadab5e9 1097 error = suser(td);
984263bc
MD
1098 if (error)
1099 return (error);
1100 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1101 return (EINVAL);
bd4539cc 1102 (void) (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1103 break;
1104
1fdf0954
HP
1105 case SIOCSIFNAME:
1106 error = suser(td);
1107 if (error != 0)
1108 return (error);
1109 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1110 if (error != 0)
1111 return (error);
1112 if (new_name[0] == '\0')
1113 return (EINVAL);
1114 if (ifunit(new_name) != NULL)
1115 return (EEXIST);
f2bd8b67
JS
1116
1117 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1fdf0954
HP
1118
1119 /* Announce the departure of the interface. */
1120 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1121
1122 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1123 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1124 /* XXX IFA_LOCK(ifa); */
1125 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1126 namelen = strlen(new_name);
1127 onamelen = sdl->sdl_nlen;
1128 /*
1129 * Move the address if needed. This is safe because we
1130 * allocate space for a name of length IFNAMSIZ when we
1131 * create this in if_attach().
1132 */
1133 if (namelen != onamelen) {
1134 bcopy(sdl->sdl_data + onamelen,
1135 sdl->sdl_data + namelen, sdl->sdl_alen);
1136 }
1137 bcopy(new_name, sdl->sdl_data, namelen);
1138 sdl->sdl_nlen = namelen;
1139 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1140 bzero(sdl->sdl_data, onamelen);
1141 while (namelen != 0)
1142 sdl->sdl_data[--namelen] = 0xff;
1143 /* XXX IFA_UNLOCK(ifa) */
f2bd8b67
JS
1144
1145 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1fdf0954
HP
1146
1147 /* Announce the return of the interface. */
1148 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1149 break;
1150
984263bc 1151 case SIOCSIFMETRIC:
dadab5e9 1152 error = suser(td);
984263bc
MD
1153 if (error)
1154 return (error);
1155 ifp->if_metric = ifr->ifr_metric;
1156 getmicrotime(&ifp->if_lastchange);
1157 break;
1158
1159 case SIOCSIFPHYS:
dadab5e9 1160 error = suser(td);
984263bc
MD
1161 if (error)
1162 return error;
1163 if (!ifp->if_ioctl)
1164 return EOPNOTSUPP;
bd4539cc 1165 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1166 if (error == 0)
1167 getmicrotime(&ifp->if_lastchange);
1168 return(error);
1169
1170 case SIOCSIFMTU:
1171 {
1172 u_long oldmtu = ifp->if_mtu;
1173
dadab5e9 1174 error = suser(td);
984263bc
MD
1175 if (error)
1176 return (error);
1177 if (ifp->if_ioctl == NULL)
1178 return (EOPNOTSUPP);
1179 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1180 return (EINVAL);
bd4539cc 1181 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1182 if (error == 0) {
1183 getmicrotime(&ifp->if_lastchange);
1184 rt_ifmsg(ifp);
1185 }
1186 /*
1187 * If the link MTU changed, do network layer specific procedure.
1188 */
1189 if (ifp->if_mtu != oldmtu) {
1190#ifdef INET6
1191 nd6_setmtu(ifp);
1192#endif
1193 }
1194 return (error);
1195 }
1196
1197 case SIOCADDMULTI:
1198 case SIOCDELMULTI:
dadab5e9 1199 error = suser(td);
984263bc
MD
1200 if (error)
1201 return (error);
1202
1203 /* Don't allow group membership on non-multicast interfaces. */
1204 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1205 return EOPNOTSUPP;
1206
1207 /* Don't let users screw up protocols' entries. */
1208 if (ifr->ifr_addr.sa_family != AF_LINK)
1209 return EINVAL;
1210
1211 if (cmd == SIOCADDMULTI) {
1212 struct ifmultiaddr *ifma;
1213 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1214 } else {
1215 error = if_delmulti(ifp, &ifr->ifr_addr);
1216 }
1217 if (error == 0)
1218 getmicrotime(&ifp->if_lastchange);
1219 return error;
1220
1221 case SIOCSIFPHYADDR:
1222 case SIOCDIFPHYADDR:
1223#ifdef INET6
1224 case SIOCSIFPHYADDR_IN6:
1225#endif
1226 case SIOCSLIFPHYADDR:
1227 case SIOCSIFMEDIA:
1228 case SIOCSIFGENERIC:
dadab5e9 1229 error = suser(td);
984263bc
MD
1230 if (error)
1231 return (error);
1232 if (ifp->if_ioctl == 0)
1233 return (EOPNOTSUPP);
bd4539cc 1234 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1235 if (error == 0)
1236 getmicrotime(&ifp->if_lastchange);
1237 return error;
1238
1239 case SIOCGIFSTATUS:
1240 ifs = (struct ifstat *)data;
1241 ifs->ascii[0] = '\0';
1242
1243 case SIOCGIFPSRCADDR:
1244 case SIOCGIFPDSTADDR:
1245 case SIOCGLIFPHYADDR:
1246 case SIOCGIFMEDIA:
1247 case SIOCGIFGENERIC:
1248 if (ifp->if_ioctl == 0)
1249 return (EOPNOTSUPP);
bd4539cc 1250 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
984263bc
MD
1251
1252 case SIOCSIFLLADDR:
dadab5e9 1253 error = suser(td);
984263bc
MD
1254 if (error)
1255 return (error);
1256 return if_setlladdr(ifp,
1257 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1258
1259 default:
1260 oif_flags = ifp->if_flags;
1261 if (so->so_proto == 0)
1262 return (EOPNOTSUPP);
1263#ifndef COMPAT_43
6b6e0885 1264 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1265#else
1266 {
1267 int ocmd = cmd;
1268
1269 switch (cmd) {
1270
1271 case SIOCSIFDSTADDR:
1272 case SIOCSIFADDR:
1273 case SIOCSIFBRDADDR:
1274 case SIOCSIFNETMASK:
1275#if BYTE_ORDER != BIG_ENDIAN
1276 if (ifr->ifr_addr.sa_family == 0 &&
1277 ifr->ifr_addr.sa_len < 16) {
1278 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1279 ifr->ifr_addr.sa_len = 16;
1280 }
1281#else
1282 if (ifr->ifr_addr.sa_len == 0)
1283 ifr->ifr_addr.sa_len = 16;
1284#endif
1285 break;
1286
1287 case OSIOCGIFADDR:
1288 cmd = SIOCGIFADDR;
1289 break;
1290
1291 case OSIOCGIFDSTADDR:
1292 cmd = SIOCGIFDSTADDR;
1293 break;
1294
1295 case OSIOCGIFBRDADDR:
1296 cmd = SIOCGIFBRDADDR;
1297 break;
1298
1299 case OSIOCGIFNETMASK:
1300 cmd = SIOCGIFNETMASK;
1301 }
6b6e0885 1302 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1303 switch (ocmd) {
1304
1305 case OSIOCGIFADDR:
1306 case OSIOCGIFDSTADDR:
1307 case OSIOCGIFBRDADDR:
1308 case OSIOCGIFNETMASK:
1309 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1310
1311 }
1312 }
1313#endif /* COMPAT_43 */
1314
1315 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1316#ifdef INET6
1317 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1318 if (ifp->if_flags & IFF_UP) {
1319 int s = splimp();
1320 in6_if_up(ifp);
1321 splx(s);
1322 }
1323#endif
1324 }
1325 return (error);
1326
1327 }
1328 return (0);
1329}
1330
1331/*
1332 * Set/clear promiscuous mode on interface ifp based on the truth value
1333 * of pswitch. The calls are reference counted so that only the first
1334 * "on" request actually has an effect, as does the final "off" request.
1335 * Results are undefined if the "off" and "on" requests are not matched.
1336 */
1337int
1338ifpromisc(ifp, pswitch)
1339 struct ifnet *ifp;
1340 int pswitch;
1341{
1342 struct ifreq ifr;
1343 int error;
1344 int oldflags;
1345
1346 oldflags = ifp->if_flags;
46f25451 1347 if (ifp->if_flags & IFF_PPROMISC) {
984263bc
MD
1348 /* Do nothing if device is in permanently promiscuous mode */
1349 ifp->if_pcount += pswitch ? 1 : -1;
1350 return (0);
1351 }
1352 if (pswitch) {
1353 /*
1354 * If the device is not configured up, we cannot put it in
1355 * promiscuous mode.
1356 */
1357 if ((ifp->if_flags & IFF_UP) == 0)
1358 return (ENETDOWN);
1359 if (ifp->if_pcount++ != 0)
1360 return (0);
1361 ifp->if_flags |= IFF_PROMISC;
3e4a09e7
MD
1362 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1363 ifp->if_xname);
984263bc
MD
1364 } else {
1365 if (--ifp->if_pcount > 0)
1366 return (0);
1367 ifp->if_flags &= ~IFF_PROMISC;
3e4a09e7
MD
1368 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1369 ifp->if_xname);
984263bc
MD
1370 }
1371 ifr.ifr_flags = ifp->if_flags;
46f25451 1372 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1373 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1374 (struct ucred *)NULL);
984263bc
MD
1375 if (error == 0)
1376 rt_ifmsg(ifp);
1377 else
1378 ifp->if_flags = oldflags;
1379 return error;
1380}
1381
1382/*
1383 * Return interface configuration
1384 * of system. List may be used
1385 * in later ioctl's (above) to get
1386 * other information.
1387 */
1388/*ARGSUSED*/
1389static int
61b8d551 1390ifconf(u_long cmd, caddr_t data, struct thread *td)
984263bc 1391{
41c20dac
MD
1392 struct ifconf *ifc = (struct ifconf *)data;
1393 struct ifnet *ifp;
1394 struct ifaddr *ifa;
984263bc
MD
1395 struct sockaddr *sa;
1396 struct ifreq ifr, *ifrp;
1397 int space = ifc->ifc_len, error = 0;
1398
1399 ifrp = ifc->ifc_req;
1400 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 1401 int addrs;
984263bc
MD
1402
1403 if (space <= sizeof (ifr))
1404 break;
3e4a09e7
MD
1405 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1406 >= sizeof(ifr.ifr_name)) {
984263bc
MD
1407 error = ENAMETOOLONG;
1408 break;
984263bc
MD
1409 }
1410
1411 addrs = 0;
984263bc
MD
1412 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1413 if (space <= sizeof(ifr))
1414 break;
1415 sa = ifa->ifa_addr;
61b8d551
JH
1416 if (td->td_proc->p_ucred->cr_prison &&
1417 prison_if(td, sa))
984263bc
MD
1418 continue;
1419 addrs++;
1420#ifdef COMPAT_43
1421 if (cmd == OSIOCGIFCONF) {
1422 struct osockaddr *osa =
1423 (struct osockaddr *)&ifr.ifr_addr;
1424 ifr.ifr_addr = *sa;
1425 osa->sa_family = sa->sa_family;
1426 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1427 sizeof (ifr));
1428 ifrp++;
1429 } else
1430#endif
1431 if (sa->sa_len <= sizeof(*sa)) {
1432 ifr.ifr_addr = *sa;
1433 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1434 sizeof (ifr));
1435 ifrp++;
1436 } else {
1437 if (space < sizeof (ifr) + sa->sa_len -
1438 sizeof(*sa))
1439 break;
1440 space -= sa->sa_len - sizeof(*sa);
1441 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1442 sizeof (ifr.ifr_name));
1443 if (error == 0)
1444 error = copyout((caddr_t)sa,
1445 (caddr_t)&ifrp->ifr_addr, sa->sa_len);
1446 ifrp = (struct ifreq *)
1447 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1448 }
1449 if (error)
1450 break;
1451 space -= sizeof (ifr);
1452 }
1453 if (error)
1454 break;
1455 if (!addrs) {
1456 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
1457 error = copyout((caddr_t)&ifr, (caddr_t)ifrp,
1458 sizeof (ifr));
1459 if (error)
1460 break;
1461 space -= sizeof (ifr);
1462 ifrp++;
1463 }
1464 }
1465 ifc->ifc_len -= space;
1466 return (error);
1467}
1468
1469/*
1470 * Just like if_promisc(), but for all-multicast-reception mode.
1471 */
1472int
1473if_allmulti(ifp, onswitch)
1474 struct ifnet *ifp;
1475 int onswitch;
1476{
1477 int error = 0;
1478 int s = splimp();
1479 struct ifreq ifr;
1480
1481 if (onswitch) {
1482 if (ifp->if_amcount++ == 0) {
1483 ifp->if_flags |= IFF_ALLMULTI;
1484 ifr.ifr_flags = ifp->if_flags;
46f25451 1485 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1486 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1487 (struct ucred *)NULL);
984263bc
MD
1488 }
1489 } else {
1490 if (ifp->if_amcount > 1) {
1491 ifp->if_amcount--;
1492 } else {
1493 ifp->if_amcount = 0;
1494 ifp->if_flags &= ~IFF_ALLMULTI;
1495 ifr.ifr_flags = ifp->if_flags;
46f25451 1496 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1497 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1498 (struct ucred *)NULL);
984263bc
MD
1499 }
1500 }
1501 splx(s);
1502
1503 if (error == 0)
1504 rt_ifmsg(ifp);
1505 return error;
1506}
1507
1508/*
1509 * Add a multicast listenership to the interface in question.
1510 * The link layer provides a routine which converts
1511 */
1512int
1513if_addmulti(ifp, sa, retifma)
1514 struct ifnet *ifp; /* interface to manipulate */
1515 struct sockaddr *sa; /* address to add */
1516 struct ifmultiaddr **retifma;
1517{
1518 struct sockaddr *llsa, *dupsa;
1519 int error, s;
1520 struct ifmultiaddr *ifma;
1521
1522 /*
1523 * If the matching multicast address already exists
1524 * then don't add a new one, just add a reference
1525 */
1526 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1527 if (equal(sa, ifma->ifma_addr)) {
1528 ifma->ifma_refcount++;
1529 if (retifma)
1530 *retifma = ifma;
1531 return 0;
1532 }
1533 }
1534
1535 /*
1536 * Give the link layer a chance to accept/reject it, and also
1537 * find out which AF_LINK address this maps to, if it isn't one
1538 * already.
1539 */
1540 if (ifp->if_resolvemulti) {
1541 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1542 if (error) return error;
1543 } else {
1544 llsa = 0;
1545 }
1546
1547 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1548 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1549 bcopy(sa, dupsa, sa->sa_len);
1550
1551 ifma->ifma_addr = dupsa;
1552 ifma->ifma_lladdr = llsa;
1553 ifma->ifma_ifp = ifp;
1554 ifma->ifma_refcount = 1;
1555 ifma->ifma_protospec = 0;
1556 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1557
1558 /*
1559 * Some network interfaces can scan the address list at
1560 * interrupt time; lock them out.
1561 */
1562 s = splimp();
1563 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1564 splx(s);
1565 *retifma = ifma;
1566
1567 if (llsa != 0) {
1568 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1569 if (equal(ifma->ifma_addr, llsa))
1570 break;
1571 }
1572 if (ifma) {
1573 ifma->ifma_refcount++;
1574 } else {
1575 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1576 M_IFMADDR, M_WAITOK);
1577 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1578 M_IFMADDR, M_WAITOK);
1579 bcopy(llsa, dupsa, llsa->sa_len);
1580 ifma->ifma_addr = dupsa;
1581 ifma->ifma_ifp = ifp;
1582 ifma->ifma_refcount = 1;
1583 s = splimp();
1584 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1585 splx(s);
1586 }
1587 }
1588 /*
1589 * We are certain we have added something, so call down to the
1590 * interface to let them know about it.
1591 */
1592 s = splimp();
bd4539cc 1593 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1594 splx(s);
1595
1596 return 0;
1597}
1598
1599/*
1600 * Remove a reference to a multicast address on this interface. Yell
1601 * if the request does not match an existing membership.
1602 */
1603int
1604if_delmulti(ifp, sa)
1605 struct ifnet *ifp;
1606 struct sockaddr *sa;
1607{
1608 struct ifmultiaddr *ifma;
1609 int s;
1610
1611 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1612 if (equal(sa, ifma->ifma_addr))
1613 break;
1614 if (ifma == 0)
1615 return ENOENT;
1616
1617 if (ifma->ifma_refcount > 1) {
1618 ifma->ifma_refcount--;
1619 return 0;
1620 }
1621
1622 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1623 sa = ifma->ifma_lladdr;
1624 s = splimp();
1625 LIST_REMOVE(ifma, ifma_link);
1626 /*
1627 * Make sure the interface driver is notified
1628 * in the case of a link layer mcast group being left.
1629 */
1630 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
bd4539cc 1631 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1632 splx(s);
1633 free(ifma->ifma_addr, M_IFMADDR);
1634 free(ifma, M_IFMADDR);
1635 if (sa == 0)
1636 return 0;
1637
1638 /*
1639 * Now look for the link-layer address which corresponds to
1640 * this network address. It had been squirreled away in
1641 * ifma->ifma_lladdr for this purpose (so we don't have
1642 * to call ifp->if_resolvemulti() again), and we saved that
1643 * value in sa above. If some nasty deleted the
1644 * link-layer address out from underneath us, we can deal because
1645 * the address we stored was is not the same as the one which was
1646 * in the record for the link-layer address. (So we don't complain
1647 * in that case.)
1648 */
1649 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1650 if (equal(sa, ifma->ifma_addr))
1651 break;
1652 if (ifma == 0)
1653 return 0;
1654
1655 if (ifma->ifma_refcount > 1) {
1656 ifma->ifma_refcount--;
1657 return 0;
1658 }
1659
1660 s = splimp();
1661 LIST_REMOVE(ifma, ifma_link);
bd4539cc 1662 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1663 splx(s);
1664 free(ifma->ifma_addr, M_IFMADDR);
1665 free(sa, M_IFMADDR);
1666 free(ifma, M_IFMADDR);
1667
1668 return 0;
1669}
1670
1671/*
1672 * Set the link layer address on an interface.
1673 *
1674 * At this time we only support certain types of interfaces,
1675 * and we don't allow the length of the address to change.
1676 */
1677int
1678if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1679{
1680 struct sockaddr_dl *sdl;
1681 struct ifaddr *ifa;
1682 struct ifreq ifr;
1683
1684 ifa = ifnet_addrs[ifp->if_index - 1];
1685 if (ifa == NULL)
1686 return (EINVAL);
1687 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1688 if (sdl == NULL)
1689 return (EINVAL);
1690 if (len != sdl->sdl_alen) /* don't allow length to change */
1691 return (EINVAL);
1692 switch (ifp->if_type) {
1693 case IFT_ETHER: /* these types use struct arpcom */
1694 case IFT_FDDI:
1695 case IFT_XETHER:
1696 case IFT_ISO88025:
1697 case IFT_L2VLAN:
1698 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1699 /* FALLTHROUGH */
1700 case IFT_ARCNET:
1701 bcopy(lladdr, LLADDR(sdl), len);
1702 break;
1703 default:
1704 return (ENODEV);
1705 }
1706 /*
1707 * If the interface is already up, we need
1708 * to re-init it in order to reprogram its
1709 * address filter.
1710 */
1711 if ((ifp->if_flags & IFF_UP) != 0) {
1712 ifp->if_flags &= ~IFF_UP;
1713 ifr.ifr_flags = ifp->if_flags;
46f25451 1714 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1715 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1716 (struct ucred *)NULL);
984263bc
MD
1717 ifp->if_flags |= IFF_UP;
1718 ifr.ifr_flags = ifp->if_flags;
46f25451 1719 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1720 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1721 (struct ucred *)NULL);
984263bc
MD
1722#ifdef INET
1723 /*
1724 * Also send gratuitous ARPs to notify other nodes about
1725 * the address change.
1726 */
1727 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1728 if (ifa->ifa_addr != NULL &&
1729 ifa->ifa_addr->sa_family == AF_INET)
1730 arp_ifinit(ifp, ifa);
1731 }
1732#endif
1733 }
1734 return (0);
1735}
1736
1737struct ifmultiaddr *
1738ifmaof_ifpforaddr(sa, ifp)
1739 struct sockaddr *sa;
1740 struct ifnet *ifp;
1741{
1742 struct ifmultiaddr *ifma;
1743
1744 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1745 if (equal(ifma->ifma_addr, sa))
1746 break;
1747
1748 return ifma;
1749}
1750
1550dfd9
MD
1751/*
1752 * The name argument must be a pointer to storage which will last as
1753 * long as the interface does. For physical devices, the result of
1754 * device_get_name(dev) is a good choice and for pseudo-devices a
1755 * static string works well.
1756 */
1757void
1758if_initname(struct ifnet *ifp, const char *name, int unit)
1759{
3e4a09e7
MD
1760 ifp->if_dname = name;
1761 ifp->if_dunit = unit;
1550dfd9
MD
1762 if (unit != IF_DUNIT_NONE)
1763 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1764 else
1765 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1766}
1767
984263bc
MD
1768int
1769if_printf(struct ifnet *ifp, const char *fmt, ...)
1770{
e2565a42 1771 __va_list ap;
984263bc
MD
1772 int retval;
1773
3e4a09e7 1774 retval = printf("%s: ", ifp->if_xname);
e2565a42 1775 __va_start(ap, fmt);
984263bc 1776 retval += vprintf(fmt, ap);
e2565a42 1777 __va_end(ap);
984263bc
MD
1778 return (retval);
1779}
1780
1781SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1782SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");