Add a new macro IF_LLSOCKADDR which maps a ifnet pointer to the
[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
f23061d4 34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
f2682cb9 35 * $DragonFly: src/sys/net/if.c,v 1.37 2005/06/03 23:23:03 joerg 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>
698ac46c 56#include <sys/domain.h>
e9cb6d99 57#include <sys/thread.h>
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58
59#include <net/if.h>
60#include <net/if_arp.h>
61#include <net/if_dl.h>
62#include <net/if_types.h>
63#include <net/if_var.h>
4d723e5a 64#include <net/ifq_var.h>
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65#include <net/radix.h>
66#include <net/route.h>
67#include <machine/stdarg.h>
68
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69#include <sys/thread2.h>
70
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71#if defined(INET) || defined(INET6)
72/*XXX*/
73#include <netinet/in.h>
74#include <netinet/in_var.h>
75#include <netinet/if_ether.h>
76#ifdef INET6
77#include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
78#include <netinet6/in6_var.h>
79#include <netinet6/in6_ifattach.h>
80#endif
81#endif
82
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83#if defined(COMPAT_43)
84#include <emulation/43bsd/43bsd_socket.h>
85#endif /* COMPAT_43 */
86
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87/*
88 * Support for non-ALTQ interfaces.
89 */
90static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *,
91 struct altq_pktattr *);
92static struct mbuf *
93 ifq_classic_dequeue(struct ifaltq *, int);
94static int ifq_classic_request(struct ifaltq *, int, void *);
95
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96/*
97 * System initialization
98 */
99
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100static void if_attachdomain(void *);
101static void if_attachdomain1(struct ifnet *);
61b8d551 102static int ifconf (u_long, caddr_t, struct thread *);
158abb01 103static void ifinit (void *);
158abb01
RG
104static void if_slowtimo (void *);
105static void link_rtrequest (int, struct rtentry *, struct rt_addrinfo *);
106static int if_rtdel (struct radix_node *, void *);
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107
108SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
109
110MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
111MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
b7b982e2 112MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
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113
114int ifqmaxlen = IFQ_MAXLEN;
115struct ifnethead ifnet; /* depend on static init XXX */
116
117#ifdef INET6
118/*
119 * XXX: declare here to avoid to include many inet6 related files..
120 * should be more generalized?
121 */
158abb01 122extern void nd6_setmtu (struct ifnet *);
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123#endif
124
158abb01
RG
125struct if_clone *if_clone_lookup (const char *, int *);
126int if_clone_list (struct if_clonereq *);
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127
128LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
129int if_cloners_count;
130
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131struct callout if_slowtimo_timer;
132
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133/*
134 * Network interface utility routines.
135 *
136 * Routines with ifa_ifwith* names take sockaddr *'s as
137 * parameters.
138 */
139/* ARGSUSED*/
140void
f23061d4 141ifinit(void *dummy)
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142{
143 struct ifnet *ifp;
144 int s;
145
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146 callout_init(&if_slowtimo_timer);
147
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148 s = splimp();
149 TAILQ_FOREACH(ifp, &ifnet, if_link) {
150 if (ifp->if_snd.ifq_maxlen == 0) {
3e4a09e7 151 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
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152 ifp->if_snd.ifq_maxlen = ifqmaxlen;
153 }
154 }
155 splx(s);
abbb44bb 156
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157 if_slowtimo(0);
158}
159
160int if_index = 0;
161struct ifaddr **ifnet_addrs;
162struct ifnet **ifindex2ifnet = NULL;
163
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164/*
165 * Attach an interface to the
166 * list of "active" interfaces.
167 */
168void
f23061d4 169if_attach(struct ifnet *ifp)
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170{
171 unsigned socksize, ifasize;
172 int namelen, masklen;
82ed7fc2
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173 struct sockaddr_dl *sdl;
174 struct ifaddr *ifa;
e3e4574a 175 struct ifaltq *ifq;
590b8cd4 176
984263bc 177 static int if_indexlim = 8;
590b8cd4 178 static boolean_t inited;
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179
180 if (!inited) {
181 TAILQ_INIT(&ifnet);
590b8cd4 182 inited = TRUE;
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183 }
184
185 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
186 ifp->if_index = ++if_index;
187 /*
188 * XXX -
189 * The old code would work if the interface passed a pre-existing
190 * chain of ifaddrs to this code. We don't trust our callers to
191 * properly initialize the tailq, however, so we no longer allow
192 * this unlikely case.
193 */
194 TAILQ_INIT(&ifp->if_addrhead);
195 TAILQ_INIT(&ifp->if_prefixhead);
196 LIST_INIT(&ifp->if_multiaddrs);
197 getmicrotime(&ifp->if_lastchange);
f23061d4 198 if (ifnet_addrs == NULL || if_index >= if_indexlim) {
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199 unsigned int n;
200 caddr_t q;
201
202 if_indexlim <<= 1;
203 n = if_indexlim * sizeof(struct ifaddr *);
204 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
f23061d4
JH
205 if (ifnet_addrs != NULL) {
206 bcopy(ifnet_addrs, q, n/2);
207 free(ifnet_addrs, M_IFADDR);
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208 }
209 ifnet_addrs = (struct ifaddr **)q;
210
211 /* grow ifindex2ifnet */
212 n = if_indexlim * sizeof(struct ifnet *);
590b8cd4 213 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
984263bc 214 if (ifindex2ifnet) {
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215 bcopy(ifindex2ifnet, q, n/2);
216 free(ifindex2ifnet, M_IFADDR);
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217 }
218 ifindex2ifnet = (struct ifnet **)q;
219 }
220
221 ifindex2ifnet[if_index] = ifp;
222
223 /*
224 * create a Link Level name for this device
225 */
3e4a09e7 226 namelen = strlen(ifp->if_xname);
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227#define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
228 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
229 socksize = masklen + ifp->if_addrlen;
230#define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
231 if (socksize < sizeof(*sdl))
232 socksize = sizeof(*sdl);
233 socksize = ROUNDUP(socksize);
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234 ifasize = sizeof(struct ifaddr) + 2 * socksize;
235 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
236 sdl = (struct sockaddr_dl *)(ifa + 1);
237 sdl->sdl_len = socksize;
238 sdl->sdl_family = AF_LINK;
239 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
240 sdl->sdl_nlen = namelen;
241 sdl->sdl_index = ifp->if_index;
242 sdl->sdl_type = ifp->if_type;
243 ifnet_addrs[if_index - 1] = ifa;
244 ifa->ifa_ifp = ifp;
245 ifa->ifa_rtrequest = link_rtrequest;
246 ifa->ifa_addr = (struct sockaddr *)sdl;
247 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
248 ifa->ifa_netmask = (struct sockaddr *)sdl;
249 sdl->sdl_len = masklen;
250 while (namelen != 0)
251 sdl->sdl_data[--namelen] = 0xff;
252 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
984263bc 253
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254 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
255
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256 ifq = &ifp->if_snd;
257 ifq->altq_type = 0;
258 ifq->altq_disc = NULL;
259 ifq->altq_flags &= ALTQF_CANTCHANGE;
260 ifq->altq_tbr = NULL;
261 ifq->altq_ifp = ifp;
b2f93efe 262 ifq_set_classic(ifq);
4d723e5a 263
9c70fe43 264 if (!SLIST_EMPTY(&domains))
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265 if_attachdomain1(ifp);
266
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267 /* Announce the interface. */
268 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
269}
270
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271static void
272if_attachdomain(void *dummy)
273{
274 struct ifnet *ifp;
275 int s;
276
277 s = splnet();
278 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
279 if_attachdomain1(ifp);
280 splx(s);
281}
282SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
283 if_attachdomain, NULL);
284
285static void
286if_attachdomain1(struct ifnet *ifp)
287{
288 struct domain *dp;
289 int s;
290
291 s = splnet();
292
293 /* address family dependent data region */
294 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
9c70fe43 295 SLIST_FOREACH(dp, &domains, dom_next)
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296 if (dp->dom_ifattach)
297 ifp->if_afdata[dp->dom_family] =
298 (*dp->dom_ifattach)(ifp);
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299 splx(s);
300}
301
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302/*
303 * Detach an interface, removing it from the
304 * list of "active" interfaces.
305 */
306void
f23061d4 307if_detach(struct ifnet *ifp)
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308{
309 struct ifaddr *ifa;
310 struct radix_node_head *rnh;
311 int s;
312 int i;
698ac46c 313 struct domain *dp;
984263bc 314
f2bd8b67
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315 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
316
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317 /*
318 * Remove routes and flush queues.
319 */
320 s = splnet();
323f031d 321#ifdef DEVICE_POLLING
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322 if (ifp->if_flags & IFF_POLLING)
323 ether_poll_deregister(ifp);
323f031d 324#endif
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325 if_down(ifp);
326
4d723e5a
JS
327 if (ifq_is_enabled(&ifp->if_snd))
328 altq_disable(&ifp->if_snd);
329 if (ifq_is_attached(&ifp->if_snd))
330 altq_detach(&ifp->if_snd);
331
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332 /*
333 * Remove address from ifnet_addrs[] and maybe decrement if_index.
334 * Clean up all addresses.
335 */
336 ifnet_addrs[ifp->if_index - 1] = 0;
337 while (if_index > 0 && ifnet_addrs[if_index - 1] == 0)
338 if_index--;
339
340 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
341 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
342#ifdef INET
343 /* XXX: Ugly!! ad hoc just for INET */
344 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
345 struct ifaliasreq ifr;
346
f23061d4 347 bzero(&ifr, sizeof ifr);
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348 ifr.ifra_addr = *ifa->ifa_addr;
349 if (ifa->ifa_dstaddr)
350 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
351 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
590b8cd4 352 NULL) == 0)
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353 continue;
354 }
355#endif /* INET */
356#ifdef INET6
357 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
358 in6_purgeaddr(ifa);
359 /* ifp_addrhead is already updated */
360 continue;
361 }
362#endif /* INET6 */
363 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
364 IFAFREE(ifa);
365 }
366
367#ifdef INET6
368 /*
369 * Remove all IPv6 kernel structs related to ifp. This should be done
370 * before removing routing entries below, since IPv6 interface direct
371 * routes are expected to be removed by the IPv6-specific kernel API.
372 * Otherwise, the kernel will detect some inconsistency and bark it.
373 */
374 in6_ifdetach(ifp);
375#endif
376
377 /*
378 * Delete all remaining routes using this interface
379 * Unfortuneatly the only way to do this is to slog through
380 * the entire routing table looking for routes which point
381 * to this interface...oh well...
382 */
383 for (i = 1; i <= AF_MAX; i++) {
384 if ((rnh = rt_tables[i]) == NULL)
385 continue;
f23061d4 386 rnh->rnh_walktree(rnh, if_rtdel, ifp);
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387 }
388
389 /* Announce that the interface is gone. */
390 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
391
9c70fe43 392 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
393 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
394 (*dp->dom_ifdetach)(ifp,
395 ifp->if_afdata[dp->dom_family]);
698ac46c 396
75857e7c
DR
397 ifindex2ifnet[ifp->if_index] = NULL;
398
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MD
399 TAILQ_REMOVE(&ifnet, ifp, if_link);
400 splx(s);
401}
402
403/*
404 * Delete Routes for a Network Interface
f23061d4 405 *
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MD
406 * Called for each routing entry via the rnh->rnh_walktree() call above
407 * to delete all route entries referencing a detaching network interface.
408 *
409 * Arguments:
410 * rn pointer to node in the routing table
411 * arg argument passed to rnh->rnh_walktree() - detaching interface
412 *
413 * Returns:
414 * 0 successful
415 * errno failed - reason indicated
416 *
417 */
418static int
f23061d4 419if_rtdel(struct radix_node *rn, void *arg)
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MD
420{
421 struct rtentry *rt = (struct rtentry *)rn;
422 struct ifnet *ifp = arg;
423 int err;
424
425 if (rt->rt_ifp == ifp) {
426
427 /*
428 * Protect (sorta) against walktree recursion problems
429 * with cloned routes
430 */
f23061d4 431 if (!(rt->rt_flags & RTF_UP))
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MD
432 return (0);
433
434 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
435 rt_mask(rt), rt->rt_flags,
436 (struct rtentry **) NULL);
437 if (err) {
438 log(LOG_WARNING, "if_rtdel: error %d\n", err);
439 }
440 }
441
442 return (0);
443}
444
445/*
446 * Create a clone network interface.
447 */
448int
f23061d4 449if_clone_create(char *name, int len)
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450{
451 struct if_clone *ifc;
452 char *dp;
b7b982e2 453 int wildcard, bytoff, bitoff;
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MD
454 int unit;
455 int err;
456
457 ifc = if_clone_lookup(name, &unit);
458 if (ifc == NULL)
459 return (EINVAL);
460
461 if (ifunit(name) != NULL)
462 return (EEXIST);
463
b7b982e2 464 bytoff = bitoff = 0;
984263bc 465 wildcard = (unit < 0);
b7b982e2
MD
466 /*
467 * Find a free unit if none was given.
468 */
469 if (wildcard) {
f23061d4
JH
470 while (bytoff < ifc->ifc_bmlen &&
471 ifc->ifc_units[bytoff] == 0xff)
b7b982e2
MD
472 bytoff++;
473 if (bytoff >= ifc->ifc_bmlen)
474 return (ENOSPC);
475 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
476 bitoff++;
477 unit = (bytoff << 3) + bitoff;
478 }
984263bc 479
b7b982e2
MD
480 if (unit > ifc->ifc_maxunit)
481 return (ENXIO);
482
483 err = (*ifc->ifc_create)(ifc, unit);
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MD
484 if (err != 0)
485 return (err);
486
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MD
487 if (!wildcard) {
488 bytoff = unit >> 3;
489 bitoff = unit - (bytoff << 3);
490 }
491
492 /*
493 * Allocate the unit in the bitmap.
494 */
495 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
496 ("%s: bit is already set", __func__));
497 ifc->ifc_units[bytoff] |= (1 << bitoff);
498
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499 /* In the wildcard case, we need to update the name. */
500 if (wildcard) {
501 for (dp = name; *dp != '\0'; dp++);
502 if (snprintf(dp, len - (dp-name), "%d", unit) >
503 len - (dp-name) - 1) {
504 /*
505 * This can only be a programmer error and
506 * there's no straightforward way to recover if
507 * it happens.
508 */
509 panic("if_clone_create(): interface name too long");
510 }
b7b982e2 511
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MD
512 }
513
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514 EVENTHANDLER_INVOKE(if_clone_event, ifc);
515
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516 return (0);
517}
518
519/*
520 * Destroy a clone network interface.
521 */
522int
f23061d4 523if_clone_destroy(const char *name)
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MD
524{
525 struct if_clone *ifc;
526 struct ifnet *ifp;
b7b982e2
MD
527 int bytoff, bitoff;
528 int unit;
984263bc 529
b7b982e2 530 ifc = if_clone_lookup(name, &unit);
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531 if (ifc == NULL)
532 return (EINVAL);
533
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MD
534 if (unit < ifc->ifc_minifs)
535 return (EINVAL);
536
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537 ifp = ifunit(name);
538 if (ifp == NULL)
539 return (ENXIO);
540
541 if (ifc->ifc_destroy == NULL)
542 return (EOPNOTSUPP);
543
544 (*ifc->ifc_destroy)(ifp);
b7b982e2
MD
545
546 /*
547 * Compute offset in the bitmap and deallocate the unit.
548 */
549 bytoff = unit >> 3;
550 bitoff = unit - (bytoff << 3);
551 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
552 ("%s: bit is already cleared", __func__));
553 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
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554 return (0);
555}
556
557/*
558 * Look up a network interface cloner.
559 */
560struct if_clone *
f23061d4 561if_clone_lookup(const char *name, int *unitp)
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MD
562{
563 struct if_clone *ifc;
564 const char *cp;
565 int i;
566
567 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
568 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
569 if (ifc->ifc_name[i] != *cp)
570 goto next_ifc;
571 }
572 goto found_name;
573 next_ifc:
574 ifc = LIST_NEXT(ifc, ifc_list);
575 }
576
577 /* No match. */
578 return ((struct if_clone *)NULL);
579
580 found_name:
581 if (*cp == '\0') {
582 i = -1;
583 } else {
584 for (i = 0; *cp != '\0'; cp++) {
585 if (*cp < '0' || *cp > '9') {
586 /* Bogus unit number. */
587 return (NULL);
588 }
589 i = (i * 10) + (*cp - '0');
590 }
591 }
592
593 if (unitp != NULL)
594 *unitp = i;
595 return (ifc);
596}
597
598/*
599 * Register a network interface cloner.
600 */
601void
f23061d4 602if_clone_attach(struct if_clone *ifc)
984263bc 603{
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MD
604 int bytoff, bitoff;
605 int err;
606 int len, maxclone;
607 int unit;
608
609 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
610 ("%s: %s requested more units then allowed (%d > %d)",
611 __func__, ifc->ifc_name, ifc->ifc_minifs,
612 ifc->ifc_maxunit + 1));
613 /*
614 * Compute bitmap size and allocate it.
615 */
616 maxclone = ifc->ifc_maxunit + 1;
617 len = maxclone >> 3;
618 if ((len << 3) < maxclone)
619 len++;
620 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
621 ifc->ifc_bmlen = len;
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622
623 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
624 if_cloners_count++;
b7b982e2
MD
625
626 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
627 err = (*ifc->ifc_create)(ifc, unit);
628 KASSERT(err == 0,
629 ("%s: failed to create required interface %s%d",
630 __func__, ifc->ifc_name, unit));
631
632 /* Allocate the unit in the bitmap. */
633 bytoff = unit >> 3;
634 bitoff = unit - (bytoff << 3);
635 ifc->ifc_units[bytoff] |= (1 << bitoff);
636 }
984263bc
MD
637}
638
639/*
640 * Unregister a network interface cloner.
641 */
642void
f23061d4 643if_clone_detach(struct if_clone *ifc)
984263bc
MD
644{
645
646 LIST_REMOVE(ifc, ifc_list);
b7b982e2 647 free(ifc->ifc_units, M_CLONE);
984263bc
MD
648 if_cloners_count--;
649}
650
651/*
652 * Provide list of interface cloners to userspace.
653 */
654int
f23061d4 655if_clone_list(struct if_clonereq *ifcr)
984263bc
MD
656{
657 char outbuf[IFNAMSIZ], *dst;
658 struct if_clone *ifc;
659 int count, error = 0;
660
661 ifcr->ifcr_total = if_cloners_count;
662 if ((dst = ifcr->ifcr_buffer) == NULL) {
663 /* Just asking how many there are. */
664 return (0);
665 }
666
667 if (ifcr->ifcr_count < 0)
668 return (EINVAL);
669
670 count = (if_cloners_count < ifcr->ifcr_count) ?
671 if_cloners_count : ifcr->ifcr_count;
672
673 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
674 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
3e4a09e7 675 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
984263bc
MD
676 error = copyout(outbuf, dst, IFNAMSIZ);
677 if (error)
678 break;
679 }
680
681 return (error);
682}
683
684/*
685 * Locate an interface based on a complete address.
686 */
984263bc 687struct ifaddr *
f23061d4 688ifa_ifwithaddr(struct sockaddr *addr)
984263bc 689{
82ed7fc2
RG
690 struct ifnet *ifp;
691 struct ifaddr *ifa;
984263bc 692
984263bc
MD
693 TAILQ_FOREACH(ifp, &ifnet, if_link)
694 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
695 if (ifa->ifa_addr->sa_family != addr->sa_family)
696 continue;
0c3c561c 697 if (sa_equal(addr, ifa->ifa_addr))
984263bc
MD
698 return (ifa);
699 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
0c3c561c 700 /* IPv6 doesn't have broadcast */
984263bc 701 ifa->ifa_broadaddr->sa_len != 0 &&
0c3c561c 702 sa_equal(ifa->ifa_broadaddr, addr))
984263bc
MD
703 return (ifa);
704 }
0c3c561c 705 return ((struct ifaddr *)NULL);
984263bc
MD
706}
707/*
708 * Locate the point to point interface with a given destination address.
709 */
984263bc 710struct ifaddr *
f23061d4 711ifa_ifwithdstaddr(struct sockaddr *addr)
984263bc 712{
82ed7fc2
RG
713 struct ifnet *ifp;
714 struct ifaddr *ifa;
984263bc
MD
715
716 TAILQ_FOREACH(ifp, &ifnet, if_link)
717 if (ifp->if_flags & IFF_POINTOPOINT)
718 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
719 if (ifa->ifa_addr->sa_family != addr->sa_family)
720 continue;
0c3c561c
JH
721 if (ifa->ifa_dstaddr &&
722 sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
723 return (ifa);
724 }
0c3c561c 725 return ((struct ifaddr *)NULL);
984263bc
MD
726}
727
728/*
729 * Find an interface on a specific network. If many, choice
730 * is most specific found.
731 */
732struct ifaddr *
f23061d4 733ifa_ifwithnet(struct sockaddr *addr)
984263bc 734{
82ed7fc2
RG
735 struct ifnet *ifp;
736 struct ifaddr *ifa;
984263bc
MD
737 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
738 u_int af = addr->sa_family;
739 char *addr_data = addr->sa_data, *cplim;
740
741 /*
742 * AF_LINK addresses can be looked up directly by their index number,
743 * so do that if we can.
744 */
745 if (af == AF_LINK) {
82ed7fc2 746 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
590b8cd4 747
984263bc
MD
748 if (sdl->sdl_index && sdl->sdl_index <= if_index)
749 return (ifnet_addrs[sdl->sdl_index - 1]);
750 }
751
752 /*
753 * Scan though each interface, looking for ones that have
754 * addresses in this address family.
755 */
756 TAILQ_FOREACH(ifp, &ifnet, if_link) {
757 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
82ed7fc2 758 char *cp, *cp2, *cp3;
984263bc
MD
759
760 if (ifa->ifa_addr->sa_family != af)
761next: continue;
762 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
763 /*
764 * This is a bit broken as it doesn't
765 * take into account that the remote end may
766 * be a single node in the network we are
767 * looking for.
768 * The trouble is that we don't know the
769 * netmask for the remote end.
770 */
0c3c561c
JH
771 if (ifa->ifa_dstaddr != NULL &&
772 sa_equal(addr, ifa->ifa_dstaddr))
f23061d4 773 return (ifa);
984263bc
MD
774 } else {
775 /*
776 * if we have a special address handler,
777 * then use it instead of the generic one.
778 */
f23061d4 779 if (ifa->ifa_claim_addr) {
984263bc
MD
780 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
781 return (ifa);
782 } else {
783 continue;
784 }
785 }
786
787 /*
788 * Scan all the bits in the ifa's address.
789 * If a bit dissagrees with what we are
790 * looking for, mask it with the netmask
791 * to see if it really matters.
792 * (A byte at a time)
793 */
794 if (ifa->ifa_netmask == 0)
795 continue;
796 cp = addr_data;
797 cp2 = ifa->ifa_addr->sa_data;
798 cp3 = ifa->ifa_netmask->sa_data;
590b8cd4
JH
799 cplim = ifa->ifa_netmask->sa_len +
800 (char *)ifa->ifa_netmask;
984263bc
MD
801 while (cp3 < cplim)
802 if ((*cp++ ^ *cp2++) & *cp3++)
803 goto next; /* next address! */
804 /*
805 * If the netmask of what we just found
806 * is more specific than what we had before
807 * (if we had one) then remember the new one
808 * before continuing to search
809 * for an even better one.
810 */
811 if (ifa_maybe == 0 ||
f23061d4
JH
812 rn_refines((char *)ifa->ifa_netmask,
813 (char *)ifa_maybe->ifa_netmask))
984263bc
MD
814 ifa_maybe = ifa;
815 }
816 }
817 }
818 return (ifa_maybe);
819}
820
821/*
822 * Find an interface address specific to an interface best matching
823 * a given address.
824 */
825struct ifaddr *
f23061d4 826ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
984263bc 827{
82ed7fc2
RG
828 struct ifaddr *ifa;
829 char *cp, *cp2, *cp3;
830 char *cplim;
984263bc
MD
831 struct ifaddr *ifa_maybe = 0;
832 u_int af = addr->sa_family;
833
834 if (af >= AF_MAX)
835 return (0);
836 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
837 if (ifa->ifa_addr->sa_family != af)
838 continue;
839 if (ifa_maybe == 0)
840 ifa_maybe = ifa;
0c3c561c
JH
841 if (ifa->ifa_netmask == NULL) {
842 if (sa_equal(addr, ifa->ifa_addr) ||
843 (ifa->ifa_dstaddr != NULL &&
844 sa_equal(addr, ifa->ifa_dstaddr)))
984263bc
MD
845 return (ifa);
846 continue;
847 }
848 if (ifp->if_flags & IFF_POINTOPOINT) {
0c3c561c 849 if (sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
850 return (ifa);
851 } else {
852 cp = addr->sa_data;
853 cp2 = ifa->ifa_addr->sa_data;
854 cp3 = ifa->ifa_netmask->sa_data;
855 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
856 for (; cp3 < cplim; cp3++)
857 if ((*cp++ ^ *cp2++) & *cp3)
858 break;
859 if (cp3 == cplim)
860 return (ifa);
861 }
862 }
863 return (ifa_maybe);
864}
865
866#include <net/route.h>
867
868/*
869 * Default action when installing a route with a Link Level gateway.
870 * Lookup an appropriate real ifa to point to.
871 * This should be moved to /sys/net/link.c eventually.
872 */
873static void
f23061d4 874link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
984263bc 875{
82ed7fc2 876 struct ifaddr *ifa;
984263bc
MD
877 struct sockaddr *dst;
878 struct ifnet *ifp;
879
f23061d4
JH
880 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
881 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
984263bc
MD
882 return;
883 ifa = ifaof_ifpforaddr(dst, ifp);
f23061d4 884 if (ifa != NULL) {
984263bc 885 IFAFREE(rt->rt_ifa);
f23061d4 886 IFAREF(ifa);
984263bc 887 rt->rt_ifa = ifa;
984263bc
MD
888 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
889 ifa->ifa_rtrequest(cmd, rt, info);
890 }
891}
892
893/*
894 * Mark an interface down and notify protocols of
895 * the transition.
896 * NOTE: must be called at splnet or eqivalent.
897 */
898void
f23061d4 899if_unroute(struct ifnet *ifp, int flag, int fam)
984263bc 900{
82ed7fc2 901 struct ifaddr *ifa;
984263bc
MD
902
903 ifp->if_flags &= ~flag;
904 getmicrotime(&ifp->if_lastchange);
905 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
906 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
907 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
4d723e5a 908 ifq_purge(&ifp->if_snd);
984263bc
MD
909 rt_ifmsg(ifp);
910}
911
912/*
913 * Mark an interface up and notify protocols of
914 * the transition.
915 * NOTE: must be called at splnet or eqivalent.
916 */
917void
f23061d4 918if_route(struct ifnet *ifp, int flag, int fam)
984263bc 919{
82ed7fc2 920 struct ifaddr *ifa;
984263bc
MD
921
922 ifp->if_flags |= flag;
923 getmicrotime(&ifp->if_lastchange);
924 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
925 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
926 pfctlinput(PRC_IFUP, ifa->ifa_addr);
927 rt_ifmsg(ifp);
928#ifdef INET6
929 in6_if_up(ifp);
930#endif
931}
932
933/*
5c703385
MD
934 * Mark an interface down and notify protocols of the transition. An
935 * interface going down is also considered to be a synchronizing event.
936 * We must ensure that all packet processing related to the interface
937 * has completed before we return so e.g. the caller can free the ifnet
938 * structure that the mbufs may be referencing.
939 *
984263bc
MD
940 * NOTE: must be called at splnet or eqivalent.
941 */
942void
f23061d4 943if_down(struct ifnet *ifp)
984263bc 944{
984263bc 945 if_unroute(ifp, IFF_UP, AF_UNSPEC);
5c703385 946 netmsg_service_sync();
984263bc
MD
947}
948
949/*
950 * Mark an interface up and notify protocols of
951 * the transition.
952 * NOTE: must be called at splnet or eqivalent.
953 */
954void
f23061d4 955if_up(struct ifnet *ifp)
984263bc
MD
956{
957
958 if_route(ifp, IFF_UP, AF_UNSPEC);
959}
960
984263bc
MD
961/*
962 * Handle interface watchdog timer routines. Called
963 * from softclock, we decrement timers (if set) and
964 * call the appropriate interface routine on expiration.
965 */
966static void
f23061d4 967if_slowtimo(void *arg)
984263bc 968{
82ed7fc2 969 struct ifnet *ifp;
984263bc
MD
970 int s = splimp();
971
972 TAILQ_FOREACH(ifp, &ifnet, if_link) {
973 if (ifp->if_timer == 0 || --ifp->if_timer)
974 continue;
975 if (ifp->if_watchdog)
976 (*ifp->if_watchdog)(ifp);
977 }
978 splx(s);
abbb44bb 979 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
984263bc
MD
980}
981
982/*
983 * Map interface name to
984 * interface structure pointer.
985 */
986struct ifnet *
987ifunit(const char *name)
988{
984263bc 989 struct ifnet *ifp;
984263bc 990
984263bc 991 /*
3e4a09e7 992 * Search all the interfaces for this name/number
984263bc 993 */
3e4a09e7 994
984263bc 995 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 996 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
984263bc
MD
997 break;
998 }
999 return (ifp);
1000}
1001
1002
1003/*
1004 * Map interface name in a sockaddr_dl to
1005 * interface structure pointer.
1006 */
1007struct ifnet *
f23061d4 1008if_withname(struct sockaddr *sa)
984263bc
MD
1009{
1010 char ifname[IFNAMSIZ+1];
1011 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1012
1013 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1014 (sdl->sdl_nlen > IFNAMSIZ) )
1015 return NULL;
1016
1017 /*
1018 * ifunit wants a null-terminated name. It may not be null-terminated
1019 * in the sockaddr. We don't want to change the caller's sockaddr,
1020 * and there might not be room to put the trailing null anyway, so we
1021 * make a local copy that we know we can null terminate safely.
1022 */
1023
1024 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1025 ifname[sdl->sdl_nlen] = '\0';
1026 return ifunit(ifname);
1027}
1028
1029
1030/*
1031 * Interface ioctls.
1032 */
1033int
dadab5e9 1034ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
984263bc 1035{
41c20dac
MD
1036 struct ifnet *ifp;
1037 struct ifreq *ifr;
984263bc
MD
1038 struct ifstat *ifs;
1039 int error;
1040 short oif_flags;
1041 int new_flags;
1fdf0954
HP
1042 size_t namelen, onamelen;
1043 char new_name[IFNAMSIZ];
1044 struct ifaddr *ifa;
1045 struct sockaddr_dl *sdl;
984263bc
MD
1046
1047 switch (cmd) {
1048
1049 case SIOCGIFCONF:
1050 case OSIOCGIFCONF:
61b8d551 1051 return (ifconf(cmd, data, td));
984263bc
MD
1052 }
1053 ifr = (struct ifreq *)data;
1054
1055 switch (cmd) {
1056 case SIOCIFCREATE:
1057 case SIOCIFDESTROY:
dadab5e9 1058 if ((error = suser(td)) != 0)
984263bc
MD
1059 return (error);
1060 return ((cmd == SIOCIFCREATE) ?
1061 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1062 if_clone_destroy(ifr->ifr_name));
f23061d4 1063
984263bc
MD
1064 case SIOCIFGCLONERS:
1065 return (if_clone_list((struct if_clonereq *)data));
1066 }
1067
1068 ifp = ifunit(ifr->ifr_name);
1069 if (ifp == 0)
1070 return (ENXIO);
1071 switch (cmd) {
1072
1073 case SIOCGIFFLAGS:
1074 ifr->ifr_flags = ifp->if_flags;
46f25451 1075 ifr->ifr_flagshigh = ifp->if_flags >> 16;
984263bc
MD
1076 break;
1077
1078 case SIOCGIFCAP:
1079 ifr->ifr_reqcap = ifp->if_capabilities;
1080 ifr->ifr_curcap = ifp->if_capenable;
1081 break;
1082
1083 case SIOCGIFMETRIC:
1084 ifr->ifr_metric = ifp->if_metric;
1085 break;
1086
1087 case SIOCGIFMTU:
1088 ifr->ifr_mtu = ifp->if_mtu;
1089 break;
1090
1091 case SIOCGIFPHYS:
1092 ifr->ifr_phys = ifp->if_physical;
1093 break;
1094
1095 case SIOCSIFFLAGS:
dadab5e9 1096 error = suser(td);
984263bc
MD
1097 if (error)
1098 return (error);
1099 new_flags = (ifr->ifr_flags & 0xffff) |
1100 (ifr->ifr_flagshigh << 16);
1101 if (ifp->if_flags & IFF_SMART) {
1102 /* Smart drivers twiddle their own routes */
1103 } else if (ifp->if_flags & IFF_UP &&
1104 (new_flags & IFF_UP) == 0) {
1105 int s = splimp();
1106 if_down(ifp);
1107 splx(s);
1108 } else if (new_flags & IFF_UP &&
1109 (ifp->if_flags & IFF_UP) == 0) {
1110 int s = splimp();
1111 if_up(ifp);
1112 splx(s);
1113 }
9c095379
MD
1114
1115#ifdef DEVICE_POLLING
1116 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1117 if (new_flags & IFF_POLLING) {
1118 ether_poll_register(ifp);
1119 } else {
1120 ether_poll_deregister(ifp);
1121 }
1122 }
1123#endif
1124
984263bc
MD
1125 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1126 (new_flags &~ IFF_CANTCHANGE);
984263bc
MD
1127 if (new_flags & IFF_PPROMISC) {
1128 /* Permanently promiscuous mode requested */
1129 ifp->if_flags |= IFF_PROMISC;
1130 } else if (ifp->if_pcount == 0) {
1131 ifp->if_flags &= ~IFF_PROMISC;
1132 }
1133 if (ifp->if_ioctl)
f23061d4 1134 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1135 getmicrotime(&ifp->if_lastchange);
1136 break;
1137
1138 case SIOCSIFCAP:
dadab5e9 1139 error = suser(td);
984263bc
MD
1140 if (error)
1141 return (error);
1142 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1143 return (EINVAL);
f23061d4 1144 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1145 break;
1146
f23061d4
JH
1147 case SIOCSIFNAME:
1148 error = suser(td);
1149 if (error != 0)
1150 return (error);
1151 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1152 if (error != 0)
1153 return (error);
1fdf0954
HP
1154 if (new_name[0] == '\0')
1155 return (EINVAL);
f23061d4
JH
1156 if (ifunit(new_name) != NULL)
1157 return (EEXIST);
f2bd8b67
JS
1158
1159 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
f23061d4
JH
1160
1161 /* Announce the departure of the interface. */
1162 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1163
1164 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1165 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1166 /* XXX IFA_LOCK(ifa); */
1167 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1168 namelen = strlen(new_name);
1169 onamelen = sdl->sdl_nlen;
1170 /*
1171 * Move the address if needed. This is safe because we
1172 * allocate space for a name of length IFNAMSIZ when we
1173 * create this in if_attach().
1174 */
1175 if (namelen != onamelen) {
1176 bcopy(sdl->sdl_data + onamelen,
1177 sdl->sdl_data + namelen, sdl->sdl_alen);
1178 }
1179 bcopy(new_name, sdl->sdl_data, namelen);
1180 sdl->sdl_nlen = namelen;
1181 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1182 bzero(sdl->sdl_data, onamelen);
1183 while (namelen != 0)
1184 sdl->sdl_data[--namelen] = 0xff;
1185 /* XXX IFA_UNLOCK(ifa) */
f2bd8b67
JS
1186
1187 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
f23061d4
JH
1188
1189 /* Announce the return of the interface. */
1190 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1191 break;
1fdf0954 1192
984263bc 1193 case SIOCSIFMETRIC:
dadab5e9 1194 error = suser(td);
984263bc
MD
1195 if (error)
1196 return (error);
1197 ifp->if_metric = ifr->ifr_metric;
1198 getmicrotime(&ifp->if_lastchange);
1199 break;
1200
1201 case SIOCSIFPHYS:
dadab5e9 1202 error = suser(td);
984263bc
MD
1203 if (error)
1204 return error;
1205 if (!ifp->if_ioctl)
1206 return EOPNOTSUPP;
bd4539cc 1207 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1208 if (error == 0)
1209 getmicrotime(&ifp->if_lastchange);
f23061d4 1210 return (error);
984263bc
MD
1211
1212 case SIOCSIFMTU:
1213 {
1214 u_long oldmtu = ifp->if_mtu;
1215
dadab5e9 1216 error = suser(td);
984263bc
MD
1217 if (error)
1218 return (error);
1219 if (ifp->if_ioctl == NULL)
1220 return (EOPNOTSUPP);
1221 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1222 return (EINVAL);
bd4539cc 1223 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1224 if (error == 0) {
1225 getmicrotime(&ifp->if_lastchange);
1226 rt_ifmsg(ifp);
1227 }
1228 /*
1229 * If the link MTU changed, do network layer specific procedure.
1230 */
1231 if (ifp->if_mtu != oldmtu) {
1232#ifdef INET6
1233 nd6_setmtu(ifp);
1234#endif
1235 }
1236 return (error);
1237 }
1238
1239 case SIOCADDMULTI:
1240 case SIOCDELMULTI:
dadab5e9 1241 error = suser(td);
984263bc
MD
1242 if (error)
1243 return (error);
1244
1245 /* Don't allow group membership on non-multicast interfaces. */
1246 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1247 return EOPNOTSUPP;
1248
1249 /* Don't let users screw up protocols' entries. */
1250 if (ifr->ifr_addr.sa_family != AF_LINK)
1251 return EINVAL;
1252
1253 if (cmd == SIOCADDMULTI) {
1254 struct ifmultiaddr *ifma;
1255 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1256 } else {
1257 error = if_delmulti(ifp, &ifr->ifr_addr);
1258 }
1259 if (error == 0)
1260 getmicrotime(&ifp->if_lastchange);
1261 return error;
1262
1263 case SIOCSIFPHYADDR:
1264 case SIOCDIFPHYADDR:
1265#ifdef INET6
1266 case SIOCSIFPHYADDR_IN6:
1267#endif
1268 case SIOCSLIFPHYADDR:
1269 case SIOCSIFMEDIA:
1270 case SIOCSIFGENERIC:
dadab5e9 1271 error = suser(td);
984263bc
MD
1272 if (error)
1273 return (error);
1274 if (ifp->if_ioctl == 0)
1275 return (EOPNOTSUPP);
bd4539cc 1276 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1277 if (error == 0)
1278 getmicrotime(&ifp->if_lastchange);
1279 return error;
1280
1281 case SIOCGIFSTATUS:
1282 ifs = (struct ifstat *)data;
1283 ifs->ascii[0] = '\0';
f23061d4 1284
984263bc
MD
1285 case SIOCGIFPSRCADDR:
1286 case SIOCGIFPDSTADDR:
1287 case SIOCGLIFPHYADDR:
1288 case SIOCGIFMEDIA:
1289 case SIOCGIFGENERIC:
1290 if (ifp->if_ioctl == 0)
1291 return (EOPNOTSUPP);
bd4539cc 1292 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
984263bc
MD
1293
1294 case SIOCSIFLLADDR:
dadab5e9 1295 error = suser(td);
984263bc
MD
1296 if (error)
1297 return (error);
1298 return if_setlladdr(ifp,
1299 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1300
1301 default:
1302 oif_flags = ifp->if_flags;
1303 if (so->so_proto == 0)
1304 return (EOPNOTSUPP);
1305#ifndef COMPAT_43
6b6e0885 1306 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1307#else
1308 {
1309 int ocmd = cmd;
1310
1311 switch (cmd) {
1312
1313 case SIOCSIFDSTADDR:
1314 case SIOCSIFADDR:
1315 case SIOCSIFBRDADDR:
1316 case SIOCSIFNETMASK:
1317#if BYTE_ORDER != BIG_ENDIAN
1318 if (ifr->ifr_addr.sa_family == 0 &&
1319 ifr->ifr_addr.sa_len < 16) {
1320 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1321 ifr->ifr_addr.sa_len = 16;
1322 }
1323#else
1324 if (ifr->ifr_addr.sa_len == 0)
1325 ifr->ifr_addr.sa_len = 16;
1326#endif
1327 break;
1328
1329 case OSIOCGIFADDR:
1330 cmd = SIOCGIFADDR;
1331 break;
1332
1333 case OSIOCGIFDSTADDR:
1334 cmd = SIOCGIFDSTADDR;
1335 break;
1336
1337 case OSIOCGIFBRDADDR:
1338 cmd = SIOCGIFBRDADDR;
1339 break;
1340
1341 case OSIOCGIFNETMASK:
1342 cmd = SIOCGIFNETMASK;
1343 }
6b6e0885 1344 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1345 switch (ocmd) {
1346
1347 case OSIOCGIFADDR:
1348 case OSIOCGIFDSTADDR:
1349 case OSIOCGIFBRDADDR:
1350 case OSIOCGIFNETMASK:
1351 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1352
1353 }
1354 }
1355#endif /* COMPAT_43 */
1356
1357 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1358#ifdef INET6
1359 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1360 if (ifp->if_flags & IFF_UP) {
1361 int s = splimp();
1362 in6_if_up(ifp);
1363 splx(s);
1364 }
1365#endif
1366 }
1367 return (error);
1368
1369 }
1370 return (0);
1371}
1372
1373/*
1374 * Set/clear promiscuous mode on interface ifp based on the truth value
1375 * of pswitch. The calls are reference counted so that only the first
1376 * "on" request actually has an effect, as does the final "off" request.
1377 * Results are undefined if the "off" and "on" requests are not matched.
1378 */
1379int
f23061d4 1380ifpromisc(struct ifnet *ifp, int pswitch)
984263bc
MD
1381{
1382 struct ifreq ifr;
1383 int error;
1384 int oldflags;
1385
1386 oldflags = ifp->if_flags;
46f25451 1387 if (ifp->if_flags & IFF_PPROMISC) {
984263bc
MD
1388 /* Do nothing if device is in permanently promiscuous mode */
1389 ifp->if_pcount += pswitch ? 1 : -1;
1390 return (0);
1391 }
1392 if (pswitch) {
1393 /*
1394 * If the device is not configured up, we cannot put it in
1395 * promiscuous mode.
1396 */
1397 if ((ifp->if_flags & IFF_UP) == 0)
1398 return (ENETDOWN);
1399 if (ifp->if_pcount++ != 0)
1400 return (0);
1401 ifp->if_flags |= IFF_PROMISC;
3e4a09e7
MD
1402 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1403 ifp->if_xname);
984263bc
MD
1404 } else {
1405 if (--ifp->if_pcount > 0)
1406 return (0);
1407 ifp->if_flags &= ~IFF_PROMISC;
3e4a09e7
MD
1408 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1409 ifp->if_xname);
984263bc
MD
1410 }
1411 ifr.ifr_flags = ifp->if_flags;
46f25451 1412 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1413 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1414 (struct ucred *)NULL);
984263bc
MD
1415 if (error == 0)
1416 rt_ifmsg(ifp);
1417 else
1418 ifp->if_flags = oldflags;
1419 return error;
1420}
1421
1422/*
1423 * Return interface configuration
1424 * of system. List may be used
1425 * in later ioctl's (above) to get
1426 * other information.
1427 */
984263bc 1428static int
61b8d551 1429ifconf(u_long cmd, caddr_t data, struct thread *td)
984263bc 1430{
41c20dac
MD
1431 struct ifconf *ifc = (struct ifconf *)data;
1432 struct ifnet *ifp;
1433 struct ifaddr *ifa;
984263bc
MD
1434 struct sockaddr *sa;
1435 struct ifreq ifr, *ifrp;
1436 int space = ifc->ifc_len, error = 0;
1437
1438 ifrp = ifc->ifc_req;
1439 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 1440 int addrs;
984263bc 1441
f23061d4 1442 if (space <= sizeof ifr)
984263bc 1443 break;
623c059e
JS
1444
1445 /*
95f018e8
MD
1446 * Zero the stack declared structure first to prevent
1447 * memory disclosure.
623c059e 1448 */
95f018e8 1449 bzero(&ifr, sizeof(ifr));
3e4a09e7
MD
1450 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1451 >= sizeof(ifr.ifr_name)) {
984263bc
MD
1452 error = ENAMETOOLONG;
1453 break;
984263bc
MD
1454 }
1455
1456 addrs = 0;
984263bc 1457 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
f23061d4 1458 if (space <= sizeof ifr)
984263bc
MD
1459 break;
1460 sa = ifa->ifa_addr;
61b8d551
JH
1461 if (td->td_proc->p_ucred->cr_prison &&
1462 prison_if(td, sa))
984263bc
MD
1463 continue;
1464 addrs++;
1465#ifdef COMPAT_43
1466 if (cmd == OSIOCGIFCONF) {
1467 struct osockaddr *osa =
1468 (struct osockaddr *)&ifr.ifr_addr;
1469 ifr.ifr_addr = *sa;
1470 osa->sa_family = sa->sa_family;
f23061d4 1471 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1472 ifrp++;
1473 } else
1474#endif
1475 if (sa->sa_len <= sizeof(*sa)) {
1476 ifr.ifr_addr = *sa;
f23061d4 1477 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1478 ifrp++;
1479 } else {
f23061d4 1480 if (space < (sizeof ifr) + sa->sa_len -
984263bc
MD
1481 sizeof(*sa))
1482 break;
1483 space -= sa->sa_len - sizeof(*sa);
f23061d4
JH
1484 error = copyout(&ifr, ifrp,
1485 sizeof ifr.ifr_name);
984263bc 1486 if (error == 0)
f23061d4
JH
1487 error = copyout(sa, &ifrp->ifr_addr,
1488 sa->sa_len);
984263bc
MD
1489 ifrp = (struct ifreq *)
1490 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1491 }
1492 if (error)
1493 break;
f23061d4 1494 space -= sizeof ifr;
984263bc
MD
1495 }
1496 if (error)
1497 break;
1498 if (!addrs) {
f23061d4
JH
1499 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1500 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1501 if (error)
1502 break;
f23061d4 1503 space -= sizeof ifr;
984263bc
MD
1504 ifrp++;
1505 }
1506 }
1507 ifc->ifc_len -= space;
1508 return (error);
1509}
1510
1511/*
1512 * Just like if_promisc(), but for all-multicast-reception mode.
1513 */
1514int
f23061d4 1515if_allmulti(struct ifnet *ifp, int onswitch)
984263bc
MD
1516{
1517 int error = 0;
1518 int s = splimp();
1519 struct ifreq ifr;
1520
1521 if (onswitch) {
1522 if (ifp->if_amcount++ == 0) {
1523 ifp->if_flags |= IFF_ALLMULTI;
1524 ifr.ifr_flags = ifp->if_flags;
46f25451 1525 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1526 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1527 (struct ucred *)NULL);
984263bc
MD
1528 }
1529 } else {
1530 if (ifp->if_amcount > 1) {
1531 ifp->if_amcount--;
1532 } else {
1533 ifp->if_amcount = 0;
1534 ifp->if_flags &= ~IFF_ALLMULTI;
1535 ifr.ifr_flags = ifp->if_flags;
46f25451 1536 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1537 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1538 (struct ucred *)NULL);
984263bc
MD
1539 }
1540 }
1541 splx(s);
1542
1543 if (error == 0)
1544 rt_ifmsg(ifp);
1545 return error;
1546}
1547
1548/*
1549 * Add a multicast listenership to the interface in question.
1550 * The link layer provides a routine which converts
1551 */
1552int
f23061d4
JH
1553if_addmulti(
1554 struct ifnet *ifp, /* interface to manipulate */
1555 struct sockaddr *sa, /* address to add */
1556 struct ifmultiaddr **retifma)
984263bc
MD
1557{
1558 struct sockaddr *llsa, *dupsa;
1559 int error, s;
1560 struct ifmultiaddr *ifma;
1561
1562 /*
1563 * If the matching multicast address already exists
1564 * then don't add a new one, just add a reference
1565 */
1566 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1567 if (sa_equal(sa, ifma->ifma_addr)) {
984263bc
MD
1568 ifma->ifma_refcount++;
1569 if (retifma)
1570 *retifma = ifma;
1571 return 0;
1572 }
1573 }
1574
1575 /*
1576 * Give the link layer a chance to accept/reject it, and also
1577 * find out which AF_LINK address this maps to, if it isn't one
1578 * already.
1579 */
1580 if (ifp->if_resolvemulti) {
1581 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1582 if (error) return error;
1583 } else {
1584 llsa = 0;
1585 }
1586
1587 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1588 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1589 bcopy(sa, dupsa, sa->sa_len);
1590
1591 ifma->ifma_addr = dupsa;
1592 ifma->ifma_lladdr = llsa;
1593 ifma->ifma_ifp = ifp;
1594 ifma->ifma_refcount = 1;
1595 ifma->ifma_protospec = 0;
1596 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1597
1598 /*
1599 * Some network interfaces can scan the address list at
1600 * interrupt time; lock them out.
1601 */
1602 s = splimp();
1603 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1604 splx(s);
1605 *retifma = ifma;
1606
1607 if (llsa != 0) {
1608 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1609 if (sa_equal(ifma->ifma_addr, llsa))
984263bc
MD
1610 break;
1611 }
1612 if (ifma) {
1613 ifma->ifma_refcount++;
1614 } else {
1615 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1616 M_IFMADDR, M_WAITOK);
1617 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1618 M_IFMADDR, M_WAITOK);
1619 bcopy(llsa, dupsa, llsa->sa_len);
1620 ifma->ifma_addr = dupsa;
1621 ifma->ifma_ifp = ifp;
1622 ifma->ifma_refcount = 1;
1623 s = splimp();
1624 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1625 splx(s);
1626 }
1627 }
1628 /*
1629 * We are certain we have added something, so call down to the
1630 * interface to let them know about it.
1631 */
1632 s = splimp();
bd4539cc 1633 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1634 splx(s);
1635
1636 return 0;
1637}
1638
1639/*
1640 * Remove a reference to a multicast address on this interface. Yell
1641 * if the request does not match an existing membership.
1642 */
1643int
f23061d4 1644if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
984263bc
MD
1645{
1646 struct ifmultiaddr *ifma;
1647 int s;
1648
1649 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1650 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1651 break;
1652 if (ifma == 0)
1653 return ENOENT;
1654
1655 if (ifma->ifma_refcount > 1) {
1656 ifma->ifma_refcount--;
1657 return 0;
1658 }
1659
1660 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1661 sa = ifma->ifma_lladdr;
1662 s = splimp();
1663 LIST_REMOVE(ifma, ifma_link);
1664 /*
1665 * Make sure the interface driver is notified
1666 * in the case of a link layer mcast group being left.
1667 */
1668 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
bd4539cc 1669 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1670 splx(s);
1671 free(ifma->ifma_addr, M_IFMADDR);
1672 free(ifma, M_IFMADDR);
1673 if (sa == 0)
1674 return 0;
1675
1676 /*
1677 * Now look for the link-layer address which corresponds to
1678 * this network address. It had been squirreled away in
1679 * ifma->ifma_lladdr for this purpose (so we don't have
1680 * to call ifp->if_resolvemulti() again), and we saved that
1681 * value in sa above. If some nasty deleted the
1682 * link-layer address out from underneath us, we can deal because
1683 * the address we stored was is not the same as the one which was
1684 * in the record for the link-layer address. (So we don't complain
1685 * in that case.)
1686 */
1687 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1688 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1689 break;
1690 if (ifma == 0)
1691 return 0;
1692
1693 if (ifma->ifma_refcount > 1) {
1694 ifma->ifma_refcount--;
1695 return 0;
1696 }
1697
1698 s = splimp();
1699 LIST_REMOVE(ifma, ifma_link);
bd4539cc 1700 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1701 splx(s);
1702 free(ifma->ifma_addr, M_IFMADDR);
1703 free(sa, M_IFMADDR);
1704 free(ifma, M_IFMADDR);
1705
1706 return 0;
1707}
1708
1709/*
1710 * Set the link layer address on an interface.
1711 *
1712 * At this time we only support certain types of interfaces,
1713 * and we don't allow the length of the address to change.
1714 */
1715int
1716if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1717{
1718 struct sockaddr_dl *sdl;
1719 struct ifaddr *ifa;
1720 struct ifreq ifr;
1721
f2682cb9 1722 sdl = IF_LLSOCKADDR(ifp);
984263bc
MD
1723 if (sdl == NULL)
1724 return (EINVAL);
1725 if (len != sdl->sdl_alen) /* don't allow length to change */
1726 return (EINVAL);
1727 switch (ifp->if_type) {
1728 case IFT_ETHER: /* these types use struct arpcom */
1729 case IFT_FDDI:
1730 case IFT_XETHER:
1731 case IFT_ISO88025:
1732 case IFT_L2VLAN:
1733 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1734 /* FALLTHROUGH */
1735 case IFT_ARCNET:
1736 bcopy(lladdr, LLADDR(sdl), len);
1737 break;
1738 default:
1739 return (ENODEV);
1740 }
1741 /*
1742 * If the interface is already up, we need
1743 * to re-init it in order to reprogram its
1744 * address filter.
1745 */
1746 if ((ifp->if_flags & IFF_UP) != 0) {
1747 ifp->if_flags &= ~IFF_UP;
1748 ifr.ifr_flags = ifp->if_flags;
46f25451 1749 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1750 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1751 (struct ucred *)NULL);
984263bc
MD
1752 ifp->if_flags |= IFF_UP;
1753 ifr.ifr_flags = ifp->if_flags;
46f25451 1754 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1755 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1756 (struct ucred *)NULL);
984263bc
MD
1757#ifdef INET
1758 /*
1759 * Also send gratuitous ARPs to notify other nodes about
1760 * the address change.
1761 */
1762 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1763 if (ifa->ifa_addr != NULL &&
1764 ifa->ifa_addr->sa_family == AF_INET)
1765 arp_ifinit(ifp, ifa);
1766 }
1767#endif
1768 }
1769 return (0);
1770}
1771
1772struct ifmultiaddr *
f23061d4 1773ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
984263bc
MD
1774{
1775 struct ifmultiaddr *ifma;
1776
1777 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1778 if (sa_equal(ifma->ifma_addr, sa))
984263bc
MD
1779 break;
1780
1781 return ifma;
1782}
1783
1550dfd9
MD
1784/*
1785 * The name argument must be a pointer to storage which will last as
1786 * long as the interface does. For physical devices, the result of
1787 * device_get_name(dev) is a good choice and for pseudo-devices a
1788 * static string works well.
1789 */
1790void
1791if_initname(struct ifnet *ifp, const char *name, int unit)
1792{
3e4a09e7
MD
1793 ifp->if_dname = name;
1794 ifp->if_dunit = unit;
1550dfd9
MD
1795 if (unit != IF_DUNIT_NONE)
1796 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1797 else
1798 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1799}
1800
984263bc
MD
1801int
1802if_printf(struct ifnet *ifp, const char *fmt, ...)
1803{
e2565a42 1804 __va_list ap;
984263bc
MD
1805 int retval;
1806
3e4a09e7 1807 retval = printf("%s: ", ifp->if_xname);
e2565a42 1808 __va_start(ap, fmt);
984263bc 1809 retval += vprintf(fmt, ap);
e2565a42 1810 __va_end(ap);
984263bc
MD
1811 return (retval);
1812}
1813
1814SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1815SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
e3e4574a 1816
b2f93efe
JS
1817void
1818ifq_set_classic(struct ifaltq *ifq)
1819{
1820 ifq->altq_enqueue = ifq_classic_enqueue;
1821 ifq->altq_dequeue = ifq_classic_dequeue;
1822 ifq->altq_request = ifq_classic_request;
1823}
1824
e3e4574a
JS
1825static int
1826ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1827 struct altq_pktattr *pa __unused)
1828{
e9cb6d99 1829 crit_enter();
e3e4574a
JS
1830 if (IF_QFULL(ifq)) {
1831 m_freem(m);
e9cb6d99 1832 crit_exit();
e3e4574a
JS
1833 return(ENOBUFS);
1834 } else {
1835 IF_ENQUEUE(ifq, m);
e9cb6d99 1836 crit_exit();
e3e4574a
JS
1837 return(0);
1838 }
1839}
1840
1841static struct mbuf *
1842ifq_classic_dequeue(struct ifaltq *ifq, int op)
1843{
1844 struct mbuf *m;
1845
e9cb6d99 1846 crit_enter();
e3e4574a
JS
1847 switch (op) {
1848 case ALTDQ_POLL:
1849 IF_POLL(ifq, m);
1850 break;
1851 case ALTDQ_REMOVE:
1852 IF_DEQUEUE(ifq, m);
1853 break;
1854 default:
1855 panic("unsupported ALTQ dequeue op: %d", op);
1856 }
e9cb6d99 1857 crit_exit();
e3e4574a
JS
1858 return(m);
1859}
1860
1861static int
1862ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1863{
e9cb6d99 1864 crit_enter();
e3e4574a
JS
1865 switch (req) {
1866 case ALTRQ_PURGE:
1867 IF_DRAIN(ifq);
1868 break;
1869 default:
1870 panic("unspported ALTQ request: %d", req);
1871 }
e9cb6d99 1872 crit_exit();
e3e4574a
JS
1873 return(0);
1874}
e9cb6d99 1875