Remove redundant assignment.
[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 $
9c095379 35 * $DragonFly: src/sys/net/if.c,v 1.35 2005/05/25 01:44:16 dillon 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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DRJ
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) {
590b8cd4
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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) {
f23061d4
JH
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);
590b8cd4
JH
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
698ac46c
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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)
698ac46c
HS
296 if (dp->dom_ifattach)
297 ifp->if_afdata[dp->dom_family] =
298 (*dp->dom_ifattach)(ifp);
698ac46c
HS
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();
9c095379
MD
321 if (ifp->if_flags & IFF_POLLING)
322 ether_poll_deregister(ifp);
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323 if_down(ifp);
324
4d723e5a
JS
325 if (ifq_is_enabled(&ifp->if_snd))
326 altq_disable(&ifp->if_snd);
327 if (ifq_is_attached(&ifp->if_snd))
328 altq_detach(&ifp->if_snd);
329
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330 /*
331 * Remove address from ifnet_addrs[] and maybe decrement if_index.
332 * Clean up all addresses.
333 */
334 ifnet_addrs[ifp->if_index - 1] = 0;
335 while (if_index > 0 && ifnet_addrs[if_index - 1] == 0)
336 if_index--;
337
338 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
339 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
340#ifdef INET
341 /* XXX: Ugly!! ad hoc just for INET */
342 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
343 struct ifaliasreq ifr;
344
f23061d4 345 bzero(&ifr, sizeof ifr);
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MD
346 ifr.ifra_addr = *ifa->ifa_addr;
347 if (ifa->ifa_dstaddr)
348 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
349 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
590b8cd4 350 NULL) == 0)
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MD
351 continue;
352 }
353#endif /* INET */
354#ifdef INET6
355 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
356 in6_purgeaddr(ifa);
357 /* ifp_addrhead is already updated */
358 continue;
359 }
360#endif /* INET6 */
361 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
362 IFAFREE(ifa);
363 }
364
365#ifdef INET6
366 /*
367 * Remove all IPv6 kernel structs related to ifp. This should be done
368 * before removing routing entries below, since IPv6 interface direct
369 * routes are expected to be removed by the IPv6-specific kernel API.
370 * Otherwise, the kernel will detect some inconsistency and bark it.
371 */
372 in6_ifdetach(ifp);
373#endif
374
375 /*
376 * Delete all remaining routes using this interface
377 * Unfortuneatly the only way to do this is to slog through
378 * the entire routing table looking for routes which point
379 * to this interface...oh well...
380 */
381 for (i = 1; i <= AF_MAX; i++) {
382 if ((rnh = rt_tables[i]) == NULL)
383 continue;
f23061d4 384 rnh->rnh_walktree(rnh, if_rtdel, ifp);
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385 }
386
387 /* Announce that the interface is gone. */
388 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
389
9c70fe43 390 SLIST_FOREACH(dp, &domains, dom_next)
698ac46c
HS
391 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
392 (*dp->dom_ifdetach)(ifp,
393 ifp->if_afdata[dp->dom_family]);
698ac46c 394
75857e7c
DR
395 ifindex2ifnet[ifp->if_index] = NULL;
396
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397 TAILQ_REMOVE(&ifnet, ifp, if_link);
398 splx(s);
399}
400
401/*
402 * Delete Routes for a Network Interface
f23061d4 403 *
984263bc
MD
404 * Called for each routing entry via the rnh->rnh_walktree() call above
405 * to delete all route entries referencing a detaching network interface.
406 *
407 * Arguments:
408 * rn pointer to node in the routing table
409 * arg argument passed to rnh->rnh_walktree() - detaching interface
410 *
411 * Returns:
412 * 0 successful
413 * errno failed - reason indicated
414 *
415 */
416static int
f23061d4 417if_rtdel(struct radix_node *rn, void *arg)
984263bc
MD
418{
419 struct rtentry *rt = (struct rtentry *)rn;
420 struct ifnet *ifp = arg;
421 int err;
422
423 if (rt->rt_ifp == ifp) {
424
425 /*
426 * Protect (sorta) against walktree recursion problems
427 * with cloned routes
428 */
f23061d4 429 if (!(rt->rt_flags & RTF_UP))
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MD
430 return (0);
431
432 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
433 rt_mask(rt), rt->rt_flags,
434 (struct rtentry **) NULL);
435 if (err) {
436 log(LOG_WARNING, "if_rtdel: error %d\n", err);
437 }
438 }
439
440 return (0);
441}
442
443/*
444 * Create a clone network interface.
445 */
446int
f23061d4 447if_clone_create(char *name, int len)
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448{
449 struct if_clone *ifc;
450 char *dp;
b7b982e2 451 int wildcard, bytoff, bitoff;
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MD
452 int unit;
453 int err;
454
455 ifc = if_clone_lookup(name, &unit);
456 if (ifc == NULL)
457 return (EINVAL);
458
459 if (ifunit(name) != NULL)
460 return (EEXIST);
461
b7b982e2 462 bytoff = bitoff = 0;
984263bc 463 wildcard = (unit < 0);
b7b982e2
MD
464 /*
465 * Find a free unit if none was given.
466 */
467 if (wildcard) {
f23061d4
JH
468 while (bytoff < ifc->ifc_bmlen &&
469 ifc->ifc_units[bytoff] == 0xff)
b7b982e2
MD
470 bytoff++;
471 if (bytoff >= ifc->ifc_bmlen)
472 return (ENOSPC);
473 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
474 bitoff++;
475 unit = (bytoff << 3) + bitoff;
476 }
984263bc 477
b7b982e2
MD
478 if (unit > ifc->ifc_maxunit)
479 return (ENXIO);
480
481 err = (*ifc->ifc_create)(ifc, unit);
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482 if (err != 0)
483 return (err);
484
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MD
485 if (!wildcard) {
486 bytoff = unit >> 3;
487 bitoff = unit - (bytoff << 3);
488 }
489
490 /*
491 * Allocate the unit in the bitmap.
492 */
493 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
494 ("%s: bit is already set", __func__));
495 ifc->ifc_units[bytoff] |= (1 << bitoff);
496
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497 /* In the wildcard case, we need to update the name. */
498 if (wildcard) {
499 for (dp = name; *dp != '\0'; dp++);
500 if (snprintf(dp, len - (dp-name), "%d", unit) >
501 len - (dp-name) - 1) {
502 /*
503 * This can only be a programmer error and
504 * there's no straightforward way to recover if
505 * it happens.
506 */
507 panic("if_clone_create(): interface name too long");
508 }
b7b982e2 509
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510 }
511
f2bd8b67
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512 EVENTHANDLER_INVOKE(if_clone_event, ifc);
513
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514 return (0);
515}
516
517/*
518 * Destroy a clone network interface.
519 */
520int
f23061d4 521if_clone_destroy(const char *name)
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522{
523 struct if_clone *ifc;
524 struct ifnet *ifp;
b7b982e2
MD
525 int bytoff, bitoff;
526 int unit;
984263bc 527
b7b982e2 528 ifc = if_clone_lookup(name, &unit);
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529 if (ifc == NULL)
530 return (EINVAL);
531
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532 if (unit < ifc->ifc_minifs)
533 return (EINVAL);
534
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535 ifp = ifunit(name);
536 if (ifp == NULL)
537 return (ENXIO);
538
539 if (ifc->ifc_destroy == NULL)
540 return (EOPNOTSUPP);
541
542 (*ifc->ifc_destroy)(ifp);
b7b982e2
MD
543
544 /*
545 * Compute offset in the bitmap and deallocate the unit.
546 */
547 bytoff = unit >> 3;
548 bitoff = unit - (bytoff << 3);
549 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
550 ("%s: bit is already cleared", __func__));
551 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
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552 return (0);
553}
554
555/*
556 * Look up a network interface cloner.
557 */
558struct if_clone *
f23061d4 559if_clone_lookup(const char *name, int *unitp)
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MD
560{
561 struct if_clone *ifc;
562 const char *cp;
563 int i;
564
565 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
566 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
567 if (ifc->ifc_name[i] != *cp)
568 goto next_ifc;
569 }
570 goto found_name;
571 next_ifc:
572 ifc = LIST_NEXT(ifc, ifc_list);
573 }
574
575 /* No match. */
576 return ((struct if_clone *)NULL);
577
578 found_name:
579 if (*cp == '\0') {
580 i = -1;
581 } else {
582 for (i = 0; *cp != '\0'; cp++) {
583 if (*cp < '0' || *cp > '9') {
584 /* Bogus unit number. */
585 return (NULL);
586 }
587 i = (i * 10) + (*cp - '0');
588 }
589 }
590
591 if (unitp != NULL)
592 *unitp = i;
593 return (ifc);
594}
595
596/*
597 * Register a network interface cloner.
598 */
599void
f23061d4 600if_clone_attach(struct if_clone *ifc)
984263bc 601{
b7b982e2
MD
602 int bytoff, bitoff;
603 int err;
604 int len, maxclone;
605 int unit;
606
607 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
608 ("%s: %s requested more units then allowed (%d > %d)",
609 __func__, ifc->ifc_name, ifc->ifc_minifs,
610 ifc->ifc_maxunit + 1));
611 /*
612 * Compute bitmap size and allocate it.
613 */
614 maxclone = ifc->ifc_maxunit + 1;
615 len = maxclone >> 3;
616 if ((len << 3) < maxclone)
617 len++;
618 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
619 ifc->ifc_bmlen = len;
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MD
620
621 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
622 if_cloners_count++;
b7b982e2
MD
623
624 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
625 err = (*ifc->ifc_create)(ifc, unit);
626 KASSERT(err == 0,
627 ("%s: failed to create required interface %s%d",
628 __func__, ifc->ifc_name, unit));
629
630 /* Allocate the unit in the bitmap. */
631 bytoff = unit >> 3;
632 bitoff = unit - (bytoff << 3);
633 ifc->ifc_units[bytoff] |= (1 << bitoff);
634 }
984263bc
MD
635}
636
637/*
638 * Unregister a network interface cloner.
639 */
640void
f23061d4 641if_clone_detach(struct if_clone *ifc)
984263bc
MD
642{
643
644 LIST_REMOVE(ifc, ifc_list);
b7b982e2 645 free(ifc->ifc_units, M_CLONE);
984263bc
MD
646 if_cloners_count--;
647}
648
649/*
650 * Provide list of interface cloners to userspace.
651 */
652int
f23061d4 653if_clone_list(struct if_clonereq *ifcr)
984263bc
MD
654{
655 char outbuf[IFNAMSIZ], *dst;
656 struct if_clone *ifc;
657 int count, error = 0;
658
659 ifcr->ifcr_total = if_cloners_count;
660 if ((dst = ifcr->ifcr_buffer) == NULL) {
661 /* Just asking how many there are. */
662 return (0);
663 }
664
665 if (ifcr->ifcr_count < 0)
666 return (EINVAL);
667
668 count = (if_cloners_count < ifcr->ifcr_count) ?
669 if_cloners_count : ifcr->ifcr_count;
670
671 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
672 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
3e4a09e7 673 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
984263bc
MD
674 error = copyout(outbuf, dst, IFNAMSIZ);
675 if (error)
676 break;
677 }
678
679 return (error);
680}
681
682/*
683 * Locate an interface based on a complete address.
684 */
984263bc 685struct ifaddr *
f23061d4 686ifa_ifwithaddr(struct sockaddr *addr)
984263bc 687{
82ed7fc2
RG
688 struct ifnet *ifp;
689 struct ifaddr *ifa;
984263bc 690
984263bc
MD
691 TAILQ_FOREACH(ifp, &ifnet, if_link)
692 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
693 if (ifa->ifa_addr->sa_family != addr->sa_family)
694 continue;
0c3c561c 695 if (sa_equal(addr, ifa->ifa_addr))
984263bc
MD
696 return (ifa);
697 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
0c3c561c 698 /* IPv6 doesn't have broadcast */
984263bc 699 ifa->ifa_broadaddr->sa_len != 0 &&
0c3c561c 700 sa_equal(ifa->ifa_broadaddr, addr))
984263bc
MD
701 return (ifa);
702 }
0c3c561c 703 return ((struct ifaddr *)NULL);
984263bc
MD
704}
705/*
706 * Locate the point to point interface with a given destination address.
707 */
984263bc 708struct ifaddr *
f23061d4 709ifa_ifwithdstaddr(struct sockaddr *addr)
984263bc 710{
82ed7fc2
RG
711 struct ifnet *ifp;
712 struct ifaddr *ifa;
984263bc
MD
713
714 TAILQ_FOREACH(ifp, &ifnet, if_link)
715 if (ifp->if_flags & IFF_POINTOPOINT)
716 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
717 if (ifa->ifa_addr->sa_family != addr->sa_family)
718 continue;
0c3c561c
JH
719 if (ifa->ifa_dstaddr &&
720 sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
721 return (ifa);
722 }
0c3c561c 723 return ((struct ifaddr *)NULL);
984263bc
MD
724}
725
726/*
727 * Find an interface on a specific network. If many, choice
728 * is most specific found.
729 */
730struct ifaddr *
f23061d4 731ifa_ifwithnet(struct sockaddr *addr)
984263bc 732{
82ed7fc2
RG
733 struct ifnet *ifp;
734 struct ifaddr *ifa;
984263bc
MD
735 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
736 u_int af = addr->sa_family;
737 char *addr_data = addr->sa_data, *cplim;
738
739 /*
740 * AF_LINK addresses can be looked up directly by their index number,
741 * so do that if we can.
742 */
743 if (af == AF_LINK) {
82ed7fc2 744 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
590b8cd4 745
984263bc
MD
746 if (sdl->sdl_index && sdl->sdl_index <= if_index)
747 return (ifnet_addrs[sdl->sdl_index - 1]);
748 }
749
750 /*
751 * Scan though each interface, looking for ones that have
752 * addresses in this address family.
753 */
754 TAILQ_FOREACH(ifp, &ifnet, if_link) {
755 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
82ed7fc2 756 char *cp, *cp2, *cp3;
984263bc
MD
757
758 if (ifa->ifa_addr->sa_family != af)
759next: continue;
760 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
761 /*
762 * This is a bit broken as it doesn't
763 * take into account that the remote end may
764 * be a single node in the network we are
765 * looking for.
766 * The trouble is that we don't know the
767 * netmask for the remote end.
768 */
0c3c561c
JH
769 if (ifa->ifa_dstaddr != NULL &&
770 sa_equal(addr, ifa->ifa_dstaddr))
f23061d4 771 return (ifa);
984263bc
MD
772 } else {
773 /*
774 * if we have a special address handler,
775 * then use it instead of the generic one.
776 */
f23061d4 777 if (ifa->ifa_claim_addr) {
984263bc
MD
778 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
779 return (ifa);
780 } else {
781 continue;
782 }
783 }
784
785 /*
786 * Scan all the bits in the ifa's address.
787 * If a bit dissagrees with what we are
788 * looking for, mask it with the netmask
789 * to see if it really matters.
790 * (A byte at a time)
791 */
792 if (ifa->ifa_netmask == 0)
793 continue;
794 cp = addr_data;
795 cp2 = ifa->ifa_addr->sa_data;
796 cp3 = ifa->ifa_netmask->sa_data;
590b8cd4
JH
797 cplim = ifa->ifa_netmask->sa_len +
798 (char *)ifa->ifa_netmask;
984263bc
MD
799 while (cp3 < cplim)
800 if ((*cp++ ^ *cp2++) & *cp3++)
801 goto next; /* next address! */
802 /*
803 * If the netmask of what we just found
804 * is more specific than what we had before
805 * (if we had one) then remember the new one
806 * before continuing to search
807 * for an even better one.
808 */
809 if (ifa_maybe == 0 ||
f23061d4
JH
810 rn_refines((char *)ifa->ifa_netmask,
811 (char *)ifa_maybe->ifa_netmask))
984263bc
MD
812 ifa_maybe = ifa;
813 }
814 }
815 }
816 return (ifa_maybe);
817}
818
819/*
820 * Find an interface address specific to an interface best matching
821 * a given address.
822 */
823struct ifaddr *
f23061d4 824ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
984263bc 825{
82ed7fc2
RG
826 struct ifaddr *ifa;
827 char *cp, *cp2, *cp3;
828 char *cplim;
984263bc
MD
829 struct ifaddr *ifa_maybe = 0;
830 u_int af = addr->sa_family;
831
832 if (af >= AF_MAX)
833 return (0);
834 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
835 if (ifa->ifa_addr->sa_family != af)
836 continue;
837 if (ifa_maybe == 0)
838 ifa_maybe = ifa;
0c3c561c
JH
839 if (ifa->ifa_netmask == NULL) {
840 if (sa_equal(addr, ifa->ifa_addr) ||
841 (ifa->ifa_dstaddr != NULL &&
842 sa_equal(addr, ifa->ifa_dstaddr)))
984263bc
MD
843 return (ifa);
844 continue;
845 }
846 if (ifp->if_flags & IFF_POINTOPOINT) {
0c3c561c 847 if (sa_equal(addr, ifa->ifa_dstaddr))
984263bc
MD
848 return (ifa);
849 } else {
850 cp = addr->sa_data;
851 cp2 = ifa->ifa_addr->sa_data;
852 cp3 = ifa->ifa_netmask->sa_data;
853 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
854 for (; cp3 < cplim; cp3++)
855 if ((*cp++ ^ *cp2++) & *cp3)
856 break;
857 if (cp3 == cplim)
858 return (ifa);
859 }
860 }
861 return (ifa_maybe);
862}
863
864#include <net/route.h>
865
866/*
867 * Default action when installing a route with a Link Level gateway.
868 * Lookup an appropriate real ifa to point to.
869 * This should be moved to /sys/net/link.c eventually.
870 */
871static void
f23061d4 872link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
984263bc 873{
82ed7fc2 874 struct ifaddr *ifa;
984263bc
MD
875 struct sockaddr *dst;
876 struct ifnet *ifp;
877
f23061d4
JH
878 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
879 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
984263bc
MD
880 return;
881 ifa = ifaof_ifpforaddr(dst, ifp);
f23061d4 882 if (ifa != NULL) {
984263bc 883 IFAFREE(rt->rt_ifa);
f23061d4 884 IFAREF(ifa);
984263bc 885 rt->rt_ifa = ifa;
984263bc
MD
886 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
887 ifa->ifa_rtrequest(cmd, rt, info);
888 }
889}
890
891/*
892 * Mark an interface down and notify protocols of
893 * the transition.
894 * NOTE: must be called at splnet or eqivalent.
895 */
896void
f23061d4 897if_unroute(struct ifnet *ifp, int flag, int fam)
984263bc 898{
82ed7fc2 899 struct ifaddr *ifa;
984263bc
MD
900
901 ifp->if_flags &= ~flag;
902 getmicrotime(&ifp->if_lastchange);
903 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
904 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
905 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
4d723e5a 906 ifq_purge(&ifp->if_snd);
984263bc
MD
907 rt_ifmsg(ifp);
908}
909
910/*
911 * Mark an interface up and notify protocols of
912 * the transition.
913 * NOTE: must be called at splnet or eqivalent.
914 */
915void
f23061d4 916if_route(struct ifnet *ifp, int flag, int fam)
984263bc 917{
82ed7fc2 918 struct ifaddr *ifa;
984263bc
MD
919
920 ifp->if_flags |= flag;
921 getmicrotime(&ifp->if_lastchange);
922 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
923 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
924 pfctlinput(PRC_IFUP, ifa->ifa_addr);
925 rt_ifmsg(ifp);
926#ifdef INET6
927 in6_if_up(ifp);
928#endif
929}
930
931/*
5c703385
MD
932 * Mark an interface down and notify protocols of the transition. An
933 * interface going down is also considered to be a synchronizing event.
934 * We must ensure that all packet processing related to the interface
935 * has completed before we return so e.g. the caller can free the ifnet
936 * structure that the mbufs may be referencing.
937 *
984263bc
MD
938 * NOTE: must be called at splnet or eqivalent.
939 */
940void
f23061d4 941if_down(struct ifnet *ifp)
984263bc 942{
984263bc 943 if_unroute(ifp, IFF_UP, AF_UNSPEC);
5c703385 944 netmsg_service_sync();
984263bc
MD
945}
946
947/*
948 * Mark an interface up and notify protocols of
949 * the transition.
950 * NOTE: must be called at splnet or eqivalent.
951 */
952void
f23061d4 953if_up(struct ifnet *ifp)
984263bc
MD
954{
955
956 if_route(ifp, IFF_UP, AF_UNSPEC);
957}
958
984263bc
MD
959/*
960 * Handle interface watchdog timer routines. Called
961 * from softclock, we decrement timers (if set) and
962 * call the appropriate interface routine on expiration.
963 */
964static void
f23061d4 965if_slowtimo(void *arg)
984263bc 966{
82ed7fc2 967 struct ifnet *ifp;
984263bc
MD
968 int s = splimp();
969
970 TAILQ_FOREACH(ifp, &ifnet, if_link) {
971 if (ifp->if_timer == 0 || --ifp->if_timer)
972 continue;
973 if (ifp->if_watchdog)
974 (*ifp->if_watchdog)(ifp);
975 }
976 splx(s);
abbb44bb 977 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
984263bc
MD
978}
979
980/*
981 * Map interface name to
982 * interface structure pointer.
983 */
984struct ifnet *
985ifunit(const char *name)
986{
984263bc 987 struct ifnet *ifp;
984263bc 988
984263bc 989 /*
3e4a09e7 990 * Search all the interfaces for this name/number
984263bc 991 */
3e4a09e7 992
984263bc 993 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 994 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
984263bc
MD
995 break;
996 }
997 return (ifp);
998}
999
1000
1001/*
1002 * Map interface name in a sockaddr_dl to
1003 * interface structure pointer.
1004 */
1005struct ifnet *
f23061d4 1006if_withname(struct sockaddr *sa)
984263bc
MD
1007{
1008 char ifname[IFNAMSIZ+1];
1009 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1010
1011 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1012 (sdl->sdl_nlen > IFNAMSIZ) )
1013 return NULL;
1014
1015 /*
1016 * ifunit wants a null-terminated name. It may not be null-terminated
1017 * in the sockaddr. We don't want to change the caller's sockaddr,
1018 * and there might not be room to put the trailing null anyway, so we
1019 * make a local copy that we know we can null terminate safely.
1020 */
1021
1022 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1023 ifname[sdl->sdl_nlen] = '\0';
1024 return ifunit(ifname);
1025}
1026
1027
1028/*
1029 * Interface ioctls.
1030 */
1031int
dadab5e9 1032ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
984263bc 1033{
41c20dac
MD
1034 struct ifnet *ifp;
1035 struct ifreq *ifr;
984263bc
MD
1036 struct ifstat *ifs;
1037 int error;
1038 short oif_flags;
1039 int new_flags;
1fdf0954
HP
1040 size_t namelen, onamelen;
1041 char new_name[IFNAMSIZ];
1042 struct ifaddr *ifa;
1043 struct sockaddr_dl *sdl;
984263bc
MD
1044
1045 switch (cmd) {
1046
1047 case SIOCGIFCONF:
1048 case OSIOCGIFCONF:
61b8d551 1049 return (ifconf(cmd, data, td));
984263bc
MD
1050 }
1051 ifr = (struct ifreq *)data;
1052
1053 switch (cmd) {
1054 case SIOCIFCREATE:
1055 case SIOCIFDESTROY:
dadab5e9 1056 if ((error = suser(td)) != 0)
984263bc
MD
1057 return (error);
1058 return ((cmd == SIOCIFCREATE) ?
1059 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1060 if_clone_destroy(ifr->ifr_name));
f23061d4 1061
984263bc
MD
1062 case SIOCIFGCLONERS:
1063 return (if_clone_list((struct if_clonereq *)data));
1064 }
1065
1066 ifp = ifunit(ifr->ifr_name);
1067 if (ifp == 0)
1068 return (ENXIO);
1069 switch (cmd) {
1070
1071 case SIOCGIFFLAGS:
1072 ifr->ifr_flags = ifp->if_flags;
46f25451 1073 ifr->ifr_flagshigh = ifp->if_flags >> 16;
984263bc
MD
1074 break;
1075
1076 case SIOCGIFCAP:
1077 ifr->ifr_reqcap = ifp->if_capabilities;
1078 ifr->ifr_curcap = ifp->if_capenable;
1079 break;
1080
1081 case SIOCGIFMETRIC:
1082 ifr->ifr_metric = ifp->if_metric;
1083 break;
1084
1085 case SIOCGIFMTU:
1086 ifr->ifr_mtu = ifp->if_mtu;
1087 break;
1088
1089 case SIOCGIFPHYS:
1090 ifr->ifr_phys = ifp->if_physical;
1091 break;
1092
1093 case SIOCSIFFLAGS:
dadab5e9 1094 error = suser(td);
984263bc
MD
1095 if (error)
1096 return (error);
1097 new_flags = (ifr->ifr_flags & 0xffff) |
1098 (ifr->ifr_flagshigh << 16);
1099 if (ifp->if_flags & IFF_SMART) {
1100 /* Smart drivers twiddle their own routes */
1101 } else if (ifp->if_flags & IFF_UP &&
1102 (new_flags & IFF_UP) == 0) {
1103 int s = splimp();
1104 if_down(ifp);
1105 splx(s);
1106 } else if (new_flags & IFF_UP &&
1107 (ifp->if_flags & IFF_UP) == 0) {
1108 int s = splimp();
1109 if_up(ifp);
1110 splx(s);
1111 }
9c095379
MD
1112
1113#ifdef DEVICE_POLLING
1114 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1115 if (new_flags & IFF_POLLING) {
1116 ether_poll_register(ifp);
1117 } else {
1118 ether_poll_deregister(ifp);
1119 }
1120 }
1121#endif
1122
984263bc
MD
1123 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1124 (new_flags &~ IFF_CANTCHANGE);
984263bc
MD
1125 if (new_flags & IFF_PPROMISC) {
1126 /* Permanently promiscuous mode requested */
1127 ifp->if_flags |= IFF_PROMISC;
1128 } else if (ifp->if_pcount == 0) {
1129 ifp->if_flags &= ~IFF_PROMISC;
1130 }
1131 if (ifp->if_ioctl)
f23061d4 1132 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1133 getmicrotime(&ifp->if_lastchange);
1134 break;
1135
1136 case SIOCSIFCAP:
dadab5e9 1137 error = suser(td);
984263bc
MD
1138 if (error)
1139 return (error);
1140 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1141 return (EINVAL);
f23061d4 1142 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1143 break;
1144
f23061d4
JH
1145 case SIOCSIFNAME:
1146 error = suser(td);
1147 if (error != 0)
1148 return (error);
1149 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1150 if (error != 0)
1151 return (error);
1fdf0954
HP
1152 if (new_name[0] == '\0')
1153 return (EINVAL);
f23061d4
JH
1154 if (ifunit(new_name) != NULL)
1155 return (EEXIST);
f2bd8b67
JS
1156
1157 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
f23061d4
JH
1158
1159 /* Announce the departure of the interface. */
1160 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1161
1162 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1163 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1164 /* XXX IFA_LOCK(ifa); */
1165 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1166 namelen = strlen(new_name);
1167 onamelen = sdl->sdl_nlen;
1168 /*
1169 * Move the address if needed. This is safe because we
1170 * allocate space for a name of length IFNAMSIZ when we
1171 * create this in if_attach().
1172 */
1173 if (namelen != onamelen) {
1174 bcopy(sdl->sdl_data + onamelen,
1175 sdl->sdl_data + namelen, sdl->sdl_alen);
1176 }
1177 bcopy(new_name, sdl->sdl_data, namelen);
1178 sdl->sdl_nlen = namelen;
1179 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1180 bzero(sdl->sdl_data, onamelen);
1181 while (namelen != 0)
1182 sdl->sdl_data[--namelen] = 0xff;
1183 /* XXX IFA_UNLOCK(ifa) */
f2bd8b67
JS
1184
1185 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
f23061d4
JH
1186
1187 /* Announce the return of the interface. */
1188 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1189 break;
1fdf0954 1190
984263bc 1191 case SIOCSIFMETRIC:
dadab5e9 1192 error = suser(td);
984263bc
MD
1193 if (error)
1194 return (error);
1195 ifp->if_metric = ifr->ifr_metric;
1196 getmicrotime(&ifp->if_lastchange);
1197 break;
1198
1199 case SIOCSIFPHYS:
dadab5e9 1200 error = suser(td);
984263bc
MD
1201 if (error)
1202 return error;
1203 if (!ifp->if_ioctl)
1204 return EOPNOTSUPP;
bd4539cc 1205 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1206 if (error == 0)
1207 getmicrotime(&ifp->if_lastchange);
f23061d4 1208 return (error);
984263bc
MD
1209
1210 case SIOCSIFMTU:
1211 {
1212 u_long oldmtu = ifp->if_mtu;
1213
dadab5e9 1214 error = suser(td);
984263bc
MD
1215 if (error)
1216 return (error);
1217 if (ifp->if_ioctl == NULL)
1218 return (EOPNOTSUPP);
1219 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1220 return (EINVAL);
bd4539cc 1221 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1222 if (error == 0) {
1223 getmicrotime(&ifp->if_lastchange);
1224 rt_ifmsg(ifp);
1225 }
1226 /*
1227 * If the link MTU changed, do network layer specific procedure.
1228 */
1229 if (ifp->if_mtu != oldmtu) {
1230#ifdef INET6
1231 nd6_setmtu(ifp);
1232#endif
1233 }
1234 return (error);
1235 }
1236
1237 case SIOCADDMULTI:
1238 case SIOCDELMULTI:
dadab5e9 1239 error = suser(td);
984263bc
MD
1240 if (error)
1241 return (error);
1242
1243 /* Don't allow group membership on non-multicast interfaces. */
1244 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1245 return EOPNOTSUPP;
1246
1247 /* Don't let users screw up protocols' entries. */
1248 if (ifr->ifr_addr.sa_family != AF_LINK)
1249 return EINVAL;
1250
1251 if (cmd == SIOCADDMULTI) {
1252 struct ifmultiaddr *ifma;
1253 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1254 } else {
1255 error = if_delmulti(ifp, &ifr->ifr_addr);
1256 }
1257 if (error == 0)
1258 getmicrotime(&ifp->if_lastchange);
1259 return error;
1260
1261 case SIOCSIFPHYADDR:
1262 case SIOCDIFPHYADDR:
1263#ifdef INET6
1264 case SIOCSIFPHYADDR_IN6:
1265#endif
1266 case SIOCSLIFPHYADDR:
1267 case SIOCSIFMEDIA:
1268 case SIOCSIFGENERIC:
dadab5e9 1269 error = suser(td);
984263bc
MD
1270 if (error)
1271 return (error);
1272 if (ifp->if_ioctl == 0)
1273 return (EOPNOTSUPP);
bd4539cc 1274 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
984263bc
MD
1275 if (error == 0)
1276 getmicrotime(&ifp->if_lastchange);
1277 return error;
1278
1279 case SIOCGIFSTATUS:
1280 ifs = (struct ifstat *)data;
1281 ifs->ascii[0] = '\0';
f23061d4 1282
984263bc
MD
1283 case SIOCGIFPSRCADDR:
1284 case SIOCGIFPDSTADDR:
1285 case SIOCGLIFPHYADDR:
1286 case SIOCGIFMEDIA:
1287 case SIOCGIFGENERIC:
1288 if (ifp->if_ioctl == 0)
1289 return (EOPNOTSUPP);
bd4539cc 1290 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
984263bc
MD
1291
1292 case SIOCSIFLLADDR:
dadab5e9 1293 error = suser(td);
984263bc
MD
1294 if (error)
1295 return (error);
1296 return if_setlladdr(ifp,
1297 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1298
1299 default:
1300 oif_flags = ifp->if_flags;
1301 if (so->so_proto == 0)
1302 return (EOPNOTSUPP);
1303#ifndef COMPAT_43
6b6e0885 1304 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1305#else
1306 {
1307 int ocmd = cmd;
1308
1309 switch (cmd) {
1310
1311 case SIOCSIFDSTADDR:
1312 case SIOCSIFADDR:
1313 case SIOCSIFBRDADDR:
1314 case SIOCSIFNETMASK:
1315#if BYTE_ORDER != BIG_ENDIAN
1316 if (ifr->ifr_addr.sa_family == 0 &&
1317 ifr->ifr_addr.sa_len < 16) {
1318 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1319 ifr->ifr_addr.sa_len = 16;
1320 }
1321#else
1322 if (ifr->ifr_addr.sa_len == 0)
1323 ifr->ifr_addr.sa_len = 16;
1324#endif
1325 break;
1326
1327 case OSIOCGIFADDR:
1328 cmd = SIOCGIFADDR;
1329 break;
1330
1331 case OSIOCGIFDSTADDR:
1332 cmd = SIOCGIFDSTADDR;
1333 break;
1334
1335 case OSIOCGIFBRDADDR:
1336 cmd = SIOCGIFBRDADDR;
1337 break;
1338
1339 case OSIOCGIFNETMASK:
1340 cmd = SIOCGIFNETMASK;
1341 }
6b6e0885 1342 error = so_pru_control(so, cmd, data, ifp, td);
984263bc
MD
1343 switch (ocmd) {
1344
1345 case OSIOCGIFADDR:
1346 case OSIOCGIFDSTADDR:
1347 case OSIOCGIFBRDADDR:
1348 case OSIOCGIFNETMASK:
1349 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1350
1351 }
1352 }
1353#endif /* COMPAT_43 */
1354
1355 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1356#ifdef INET6
1357 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1358 if (ifp->if_flags & IFF_UP) {
1359 int s = splimp();
1360 in6_if_up(ifp);
1361 splx(s);
1362 }
1363#endif
1364 }
1365 return (error);
1366
1367 }
1368 return (0);
1369}
1370
1371/*
1372 * Set/clear promiscuous mode on interface ifp based on the truth value
1373 * of pswitch. The calls are reference counted so that only the first
1374 * "on" request actually has an effect, as does the final "off" request.
1375 * Results are undefined if the "off" and "on" requests are not matched.
1376 */
1377int
f23061d4 1378ifpromisc(struct ifnet *ifp, int pswitch)
984263bc
MD
1379{
1380 struct ifreq ifr;
1381 int error;
1382 int oldflags;
1383
1384 oldflags = ifp->if_flags;
46f25451 1385 if (ifp->if_flags & IFF_PPROMISC) {
984263bc
MD
1386 /* Do nothing if device is in permanently promiscuous mode */
1387 ifp->if_pcount += pswitch ? 1 : -1;
1388 return (0);
1389 }
1390 if (pswitch) {
1391 /*
1392 * If the device is not configured up, we cannot put it in
1393 * promiscuous mode.
1394 */
1395 if ((ifp->if_flags & IFF_UP) == 0)
1396 return (ENETDOWN);
1397 if (ifp->if_pcount++ != 0)
1398 return (0);
1399 ifp->if_flags |= IFF_PROMISC;
3e4a09e7
MD
1400 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1401 ifp->if_xname);
984263bc
MD
1402 } else {
1403 if (--ifp->if_pcount > 0)
1404 return (0);
1405 ifp->if_flags &= ~IFF_PROMISC;
3e4a09e7
MD
1406 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1407 ifp->if_xname);
984263bc
MD
1408 }
1409 ifr.ifr_flags = ifp->if_flags;
46f25451 1410 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1411 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1412 (struct ucred *)NULL);
984263bc
MD
1413 if (error == 0)
1414 rt_ifmsg(ifp);
1415 else
1416 ifp->if_flags = oldflags;
1417 return error;
1418}
1419
1420/*
1421 * Return interface configuration
1422 * of system. List may be used
1423 * in later ioctl's (above) to get
1424 * other information.
1425 */
984263bc 1426static int
61b8d551 1427ifconf(u_long cmd, caddr_t data, struct thread *td)
984263bc 1428{
41c20dac
MD
1429 struct ifconf *ifc = (struct ifconf *)data;
1430 struct ifnet *ifp;
1431 struct ifaddr *ifa;
984263bc
MD
1432 struct sockaddr *sa;
1433 struct ifreq ifr, *ifrp;
1434 int space = ifc->ifc_len, error = 0;
1435
1436 ifrp = ifc->ifc_req;
1437 TAILQ_FOREACH(ifp, &ifnet, if_link) {
3e4a09e7 1438 int addrs;
984263bc 1439
f23061d4 1440 if (space <= sizeof ifr)
984263bc 1441 break;
623c059e
JS
1442
1443 /*
95f018e8
MD
1444 * Zero the stack declared structure first to prevent
1445 * memory disclosure.
623c059e 1446 */
95f018e8 1447 bzero(&ifr, sizeof(ifr));
3e4a09e7
MD
1448 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1449 >= sizeof(ifr.ifr_name)) {
984263bc
MD
1450 error = ENAMETOOLONG;
1451 break;
984263bc
MD
1452 }
1453
1454 addrs = 0;
984263bc 1455 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
f23061d4 1456 if (space <= sizeof ifr)
984263bc
MD
1457 break;
1458 sa = ifa->ifa_addr;
61b8d551
JH
1459 if (td->td_proc->p_ucred->cr_prison &&
1460 prison_if(td, sa))
984263bc
MD
1461 continue;
1462 addrs++;
1463#ifdef COMPAT_43
1464 if (cmd == OSIOCGIFCONF) {
1465 struct osockaddr *osa =
1466 (struct osockaddr *)&ifr.ifr_addr;
1467 ifr.ifr_addr = *sa;
1468 osa->sa_family = sa->sa_family;
f23061d4 1469 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1470 ifrp++;
1471 } else
1472#endif
1473 if (sa->sa_len <= sizeof(*sa)) {
1474 ifr.ifr_addr = *sa;
f23061d4 1475 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1476 ifrp++;
1477 } else {
f23061d4 1478 if (space < (sizeof ifr) + sa->sa_len -
984263bc
MD
1479 sizeof(*sa))
1480 break;
1481 space -= sa->sa_len - sizeof(*sa);
f23061d4
JH
1482 error = copyout(&ifr, ifrp,
1483 sizeof ifr.ifr_name);
984263bc 1484 if (error == 0)
f23061d4
JH
1485 error = copyout(sa, &ifrp->ifr_addr,
1486 sa->sa_len);
984263bc
MD
1487 ifrp = (struct ifreq *)
1488 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1489 }
1490 if (error)
1491 break;
f23061d4 1492 space -= sizeof ifr;
984263bc
MD
1493 }
1494 if (error)
1495 break;
1496 if (!addrs) {
f23061d4
JH
1497 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1498 error = copyout(&ifr, ifrp, sizeof ifr);
984263bc
MD
1499 if (error)
1500 break;
f23061d4 1501 space -= sizeof ifr;
984263bc
MD
1502 ifrp++;
1503 }
1504 }
1505 ifc->ifc_len -= space;
1506 return (error);
1507}
1508
1509/*
1510 * Just like if_promisc(), but for all-multicast-reception mode.
1511 */
1512int
f23061d4 1513if_allmulti(struct ifnet *ifp, int onswitch)
984263bc
MD
1514{
1515 int error = 0;
1516 int s = splimp();
1517 struct ifreq ifr;
1518
1519 if (onswitch) {
1520 if (ifp->if_amcount++ == 0) {
1521 ifp->if_flags |= IFF_ALLMULTI;
1522 ifr.ifr_flags = ifp->if_flags;
46f25451 1523 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1524 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1525 (struct ucred *)NULL);
984263bc
MD
1526 }
1527 } else {
1528 if (ifp->if_amcount > 1) {
1529 ifp->if_amcount--;
1530 } else {
1531 ifp->if_amcount = 0;
1532 ifp->if_flags &= ~IFF_ALLMULTI;
1533 ifr.ifr_flags = ifp->if_flags;
46f25451 1534 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1535 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1536 (struct ucred *)NULL);
984263bc
MD
1537 }
1538 }
1539 splx(s);
1540
1541 if (error == 0)
1542 rt_ifmsg(ifp);
1543 return error;
1544}
1545
1546/*
1547 * Add a multicast listenership to the interface in question.
1548 * The link layer provides a routine which converts
1549 */
1550int
f23061d4
JH
1551if_addmulti(
1552 struct ifnet *ifp, /* interface to manipulate */
1553 struct sockaddr *sa, /* address to add */
1554 struct ifmultiaddr **retifma)
984263bc
MD
1555{
1556 struct sockaddr *llsa, *dupsa;
1557 int error, s;
1558 struct ifmultiaddr *ifma;
1559
1560 /*
1561 * If the matching multicast address already exists
1562 * then don't add a new one, just add a reference
1563 */
1564 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1565 if (sa_equal(sa, ifma->ifma_addr)) {
984263bc
MD
1566 ifma->ifma_refcount++;
1567 if (retifma)
1568 *retifma = ifma;
1569 return 0;
1570 }
1571 }
1572
1573 /*
1574 * Give the link layer a chance to accept/reject it, and also
1575 * find out which AF_LINK address this maps to, if it isn't one
1576 * already.
1577 */
1578 if (ifp->if_resolvemulti) {
1579 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1580 if (error) return error;
1581 } else {
1582 llsa = 0;
1583 }
1584
1585 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1586 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1587 bcopy(sa, dupsa, sa->sa_len);
1588
1589 ifma->ifma_addr = dupsa;
1590 ifma->ifma_lladdr = llsa;
1591 ifma->ifma_ifp = ifp;
1592 ifma->ifma_refcount = 1;
1593 ifma->ifma_protospec = 0;
1594 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1595
1596 /*
1597 * Some network interfaces can scan the address list at
1598 * interrupt time; lock them out.
1599 */
1600 s = splimp();
1601 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1602 splx(s);
1603 *retifma = ifma;
1604
1605 if (llsa != 0) {
1606 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
0c3c561c 1607 if (sa_equal(ifma->ifma_addr, llsa))
984263bc
MD
1608 break;
1609 }
1610 if (ifma) {
1611 ifma->ifma_refcount++;
1612 } else {
1613 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1614 M_IFMADDR, M_WAITOK);
1615 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1616 M_IFMADDR, M_WAITOK);
1617 bcopy(llsa, dupsa, llsa->sa_len);
1618 ifma->ifma_addr = dupsa;
1619 ifma->ifma_ifp = ifp;
1620 ifma->ifma_refcount = 1;
1621 s = splimp();
1622 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1623 splx(s);
1624 }
1625 }
1626 /*
1627 * We are certain we have added something, so call down to the
1628 * interface to let them know about it.
1629 */
1630 s = splimp();
bd4539cc 1631 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1632 splx(s);
1633
1634 return 0;
1635}
1636
1637/*
1638 * Remove a reference to a multicast address on this interface. Yell
1639 * if the request does not match an existing membership.
1640 */
1641int
f23061d4 1642if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
984263bc
MD
1643{
1644 struct ifmultiaddr *ifma;
1645 int s;
1646
1647 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1648 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1649 break;
1650 if (ifma == 0)
1651 return ENOENT;
1652
1653 if (ifma->ifma_refcount > 1) {
1654 ifma->ifma_refcount--;
1655 return 0;
1656 }
1657
1658 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1659 sa = ifma->ifma_lladdr;
1660 s = splimp();
1661 LIST_REMOVE(ifma, ifma_link);
1662 /*
1663 * Make sure the interface driver is notified
1664 * in the case of a link layer mcast group being left.
1665 */
1666 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
bd4539cc 1667 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1668 splx(s);
1669 free(ifma->ifma_addr, M_IFMADDR);
1670 free(ifma, M_IFMADDR);
1671 if (sa == 0)
1672 return 0;
1673
1674 /*
1675 * Now look for the link-layer address which corresponds to
1676 * this network address. It had been squirreled away in
1677 * ifma->ifma_lladdr for this purpose (so we don't have
1678 * to call ifp->if_resolvemulti() again), and we saved that
1679 * value in sa above. If some nasty deleted the
1680 * link-layer address out from underneath us, we can deal because
1681 * the address we stored was is not the same as the one which was
1682 * in the record for the link-layer address. (So we don't complain
1683 * in that case.)
1684 */
1685 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1686 if (sa_equal(sa, ifma->ifma_addr))
984263bc
MD
1687 break;
1688 if (ifma == 0)
1689 return 0;
1690
1691 if (ifma->ifma_refcount > 1) {
1692 ifma->ifma_refcount--;
1693 return 0;
1694 }
1695
1696 s = splimp();
1697 LIST_REMOVE(ifma, ifma_link);
bd4539cc 1698 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
984263bc
MD
1699 splx(s);
1700 free(ifma->ifma_addr, M_IFMADDR);
1701 free(sa, M_IFMADDR);
1702 free(ifma, M_IFMADDR);
1703
1704 return 0;
1705}
1706
1707/*
1708 * Set the link layer address on an interface.
1709 *
1710 * At this time we only support certain types of interfaces,
1711 * and we don't allow the length of the address to change.
1712 */
1713int
1714if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1715{
1716 struct sockaddr_dl *sdl;
1717 struct ifaddr *ifa;
1718 struct ifreq ifr;
1719
1720 ifa = ifnet_addrs[ifp->if_index - 1];
1721 if (ifa == NULL)
1722 return (EINVAL);
1723 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1724 if (sdl == NULL)
1725 return (EINVAL);
1726 if (len != sdl->sdl_alen) /* don't allow length to change */
1727 return (EINVAL);
1728 switch (ifp->if_type) {
1729 case IFT_ETHER: /* these types use struct arpcom */
1730 case IFT_FDDI:
1731 case IFT_XETHER:
1732 case IFT_ISO88025:
1733 case IFT_L2VLAN:
1734 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1735 /* FALLTHROUGH */
1736 case IFT_ARCNET:
1737 bcopy(lladdr, LLADDR(sdl), len);
1738 break;
1739 default:
1740 return (ENODEV);
1741 }
1742 /*
1743 * If the interface is already up, we need
1744 * to re-init it in order to reprogram its
1745 * address filter.
1746 */
1747 if ((ifp->if_flags & IFF_UP) != 0) {
1748 ifp->if_flags &= ~IFF_UP;
1749 ifr.ifr_flags = ifp->if_flags;
46f25451 1750 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1751 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1752 (struct ucred *)NULL);
984263bc
MD
1753 ifp->if_flags |= IFF_UP;
1754 ifr.ifr_flags = ifp->if_flags;
46f25451 1755 ifr.ifr_flagshigh = ifp->if_flags >> 16;
bd4539cc
JH
1756 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1757 (struct ucred *)NULL);
984263bc
MD
1758#ifdef INET
1759 /*
1760 * Also send gratuitous ARPs to notify other nodes about
1761 * the address change.
1762 */
1763 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1764 if (ifa->ifa_addr != NULL &&
1765 ifa->ifa_addr->sa_family == AF_INET)
1766 arp_ifinit(ifp, ifa);
1767 }
1768#endif
1769 }
1770 return (0);
1771}
1772
1773struct ifmultiaddr *
f23061d4 1774ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
984263bc
MD
1775{
1776 struct ifmultiaddr *ifma;
1777
1778 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
0c3c561c 1779 if (sa_equal(ifma->ifma_addr, sa))
984263bc
MD
1780 break;
1781
1782 return ifma;
1783}
1784
1550dfd9
MD
1785/*
1786 * The name argument must be a pointer to storage which will last as
1787 * long as the interface does. For physical devices, the result of
1788 * device_get_name(dev) is a good choice and for pseudo-devices a
1789 * static string works well.
1790 */
1791void
1792if_initname(struct ifnet *ifp, const char *name, int unit)
1793{
3e4a09e7
MD
1794 ifp->if_dname = name;
1795 ifp->if_dunit = unit;
1550dfd9
MD
1796 if (unit != IF_DUNIT_NONE)
1797 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1798 else
1799 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1800}
1801
984263bc
MD
1802int
1803if_printf(struct ifnet *ifp, const char *fmt, ...)
1804{
e2565a42 1805 __va_list ap;
984263bc
MD
1806 int retval;
1807
3e4a09e7 1808 retval = printf("%s: ", ifp->if_xname);
e2565a42 1809 __va_start(ap, fmt);
984263bc 1810 retval += vprintf(fmt, ap);
e2565a42 1811 __va_end(ap);
984263bc
MD
1812 return (retval);
1813}
1814
1815SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1816SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
e3e4574a 1817
b2f93efe
JS
1818void
1819ifq_set_classic(struct ifaltq *ifq)
1820{
1821 ifq->altq_enqueue = ifq_classic_enqueue;
1822 ifq->altq_dequeue = ifq_classic_dequeue;
1823 ifq->altq_request = ifq_classic_request;
1824}
1825
e3e4574a
JS
1826static int
1827ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1828 struct altq_pktattr *pa __unused)
1829{
e9cb6d99 1830 crit_enter();
e3e4574a
JS
1831 if (IF_QFULL(ifq)) {
1832 m_freem(m);
e9cb6d99 1833 crit_exit();
e3e4574a
JS
1834 return(ENOBUFS);
1835 } else {
1836 IF_ENQUEUE(ifq, m);
e9cb6d99 1837 crit_exit();
e3e4574a
JS
1838 return(0);
1839 }
1840}
1841
1842static struct mbuf *
1843ifq_classic_dequeue(struct ifaltq *ifq, int op)
1844{
1845 struct mbuf *m;
1846
e9cb6d99 1847 crit_enter();
e3e4574a
JS
1848 switch (op) {
1849 case ALTDQ_POLL:
1850 IF_POLL(ifq, m);
1851 break;
1852 case ALTDQ_REMOVE:
1853 IF_DEQUEUE(ifq, m);
1854 break;
1855 default:
1856 panic("unsupported ALTQ dequeue op: %d", op);
1857 }
e9cb6d99 1858 crit_exit();
e3e4574a
JS
1859 return(m);
1860}
1861
1862static int
1863ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1864{
e9cb6d99 1865 crit_enter();
e3e4574a
JS
1866 switch (req) {
1867 case ALTRQ_PURGE:
1868 IF_DRAIN(ifq);
1869 break;
1870 default:
1871 panic("unspported ALTQ request: %d", req);
1872 }
e9cb6d99 1873 crit_exit();
e3e4574a
JS
1874 return(0);
1875}
e9cb6d99 1876