FreeBSD/Linux Kernel Cross Reference
sys/net/if.c
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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
30 * $FreeBSD: releng/11.1/sys/net/if.c 318397 2017-05-17 05:53:25Z rpokala $
31 */
32
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
35 #include "opt_inet.h"
36
37 #include <sys/param.h>
38 #include <sys/types.h>
39 #include <sys/conf.h>
40 #include <sys/malloc.h>
41 #include <sys/sbuf.h>
42 #include <sys/bus.h>
43 #include <sys/mbuf.h>
44 #include <sys/systm.h>
45 #include <sys/priv.h>
46 #include <sys/proc.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.h>
51 #include <sys/lock.h>
52 #include <sys/refcount.h>
53 #include <sys/module.h>
54 #include <sys/rwlock.h>
55 #include <sys/sockio.h>
56 #include <sys/syslog.h>
57 #include <sys/sysctl.h>
58 #include <sys/taskqueue.h>
59 #include <sys/domain.h>
60 #include <sys/jail.h>
61 #include <sys/priv.h>
62
63 #include <machine/stdarg.h>
64 #include <vm/uma.h>
65
66 #include <net/bpf.h>
67 #include <net/ethernet.h>
68 #include <net/if.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_dl.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
74 #include <net/if_media.h>
75 #include <net/if_vlan_var.h>
76 #include <net/radix.h>
77 #include <net/route.h>
78 #include <net/vnet.h>
79
80 #if defined(INET) || defined(INET6)
81 #include <net/ethernet.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_carp.h>
86 #ifdef INET
87 #include <netinet/if_ether.h>
88 #endif /* INET */
89 #ifdef INET6
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
92 #endif /* INET6 */
93 #endif /* INET || INET6 */
94
95 #include <security/mac/mac_framework.h>
96
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
100 #endif
101
102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
104
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
107
108 /* Log link state change events */
109 static int log_link_state_change = 1;
110
111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
112 &log_link_state_change, 0,
113 "log interface link state change events");
114
115 /* Log promiscuous mode change events */
116 static int log_promisc_mode_change = 1;
117
118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
119 &log_promisc_mode_change, 1,
120 "log promiscuous mode change events");
121
122 /* Interface description */
123 static unsigned int ifdescr_maxlen = 1024;
124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
125 &ifdescr_maxlen, 0,
126 "administrative maximum length for interface description");
127
128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
129
130 /* global sx for non-critical path ifdescr */
131 static struct sx ifdescr_sx;
132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
133
134 void (*bridge_linkstate_p)(struct ifnet *ifp);
135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
137 /* These are external hooks for CARP. */
138 void (*carp_linkstate_p)(struct ifnet *ifp);
139 void (*carp_demote_adj_p)(int, char *);
140 int (*carp_master_p)(struct ifaddr *);
141 #if defined(INET) || defined(INET6)
142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
144 const struct sockaddr *sa);
145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
146 int (*carp_attach_p)(struct ifaddr *, int);
147 void (*carp_detach_p)(struct ifaddr *);
148 #endif
149 #ifdef INET
150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
151 #endif
152 #ifdef INET6
153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
155 const struct in6_addr *taddr);
156 #endif
157
158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
159
160 /*
161 * XXX: Style; these should be sorted alphabetically, and unprototyped
162 * static functions should be prototyped. Currently they are sorted by
163 * declaration order.
164 */
165 static void if_attachdomain(void *);
166 static void if_attachdomain1(struct ifnet *);
167 static int ifconf(u_long, caddr_t);
168 static void if_freemulti(struct ifmultiaddr *);
169 static void if_grow(void);
170 static void if_input_default(struct ifnet *, struct mbuf *);
171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
172 static void if_route(struct ifnet *, int flag, int fam);
173 static int if_setflag(struct ifnet *, int, int, int *, int);
174 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
175 static void if_unroute(struct ifnet *, int flag, int fam);
176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
179 static void do_link_state_change(void *, int);
180 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
181 static int if_getgroupmembers(struct ifgroupreq *);
182 static void if_delgroups(struct ifnet *);
183 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
184 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
185 #ifdef VIMAGE
186 static void if_vmove(struct ifnet *, struct vnet *);
187 #endif
188
189 #ifdef INET6
190 /*
191 * XXX: declare here to avoid to include many inet6 related files..
192 * should be more generalized?
193 */
194 extern void nd6_setmtu(struct ifnet *);
195 #endif
196
197 /* ipsec helper hooks */
198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
200
201 VNET_DEFINE(int, if_index);
202 int ifqmaxlen = IFQ_MAXLEN;
203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
204 VNET_DEFINE(struct ifgrouphead, ifg_head);
205
206 static VNET_DEFINE(int, if_indexlim) = 8;
207
208 /* Table of ifnet by index. */
209 VNET_DEFINE(struct ifnet **, ifindex_table);
210
211 #define V_if_indexlim VNET(if_indexlim)
212 #define V_ifindex_table VNET(ifindex_table)
213
214 /*
215 * The global network interface list (V_ifnet) and related state (such as
216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
217 * an rwlock. Either may be acquired shared to stablize the list, but both
218 * must be acquired writable to modify the list. This model allows us to
219 * both stablize the interface list during interrupt thread processing, but
220 * also to stablize it over long-running ioctls, without introducing priority
221 * inversions and deadlocks.
222 */
223 struct rwlock ifnet_rwlock;
224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
225 struct sx ifnet_sxlock;
226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
227
228 /*
229 * The allocation of network interfaces is a rather non-atomic affair; we
230 * need to select an index before we are ready to expose the interface for
231 * use, so will use this pointer value to indicate reservation.
232 */
233 #define IFNET_HOLD (void *)(uintptr_t)(-1)
234
235 static if_com_alloc_t *if_com_alloc[256];
236 static if_com_free_t *if_com_free[256];
237
238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
241
242 struct ifnet *
243 ifnet_byindex_locked(u_short idx)
244 {
245
246 if (idx > V_if_index)
247 return (NULL);
248 if (V_ifindex_table[idx] == IFNET_HOLD)
249 return (NULL);
250 return (V_ifindex_table[idx]);
251 }
252
253 struct ifnet *
254 ifnet_byindex(u_short idx)
255 {
256 struct ifnet *ifp;
257
258 IFNET_RLOCK_NOSLEEP();
259 ifp = ifnet_byindex_locked(idx);
260 IFNET_RUNLOCK_NOSLEEP();
261 return (ifp);
262 }
263
264 struct ifnet *
265 ifnet_byindex_ref(u_short idx)
266 {
267 struct ifnet *ifp;
268
269 IFNET_RLOCK_NOSLEEP();
270 ifp = ifnet_byindex_locked(idx);
271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
272 IFNET_RUNLOCK_NOSLEEP();
273 return (NULL);
274 }
275 if_ref(ifp);
276 IFNET_RUNLOCK_NOSLEEP();
277 return (ifp);
278 }
279
280 /*
281 * Allocate an ifindex array entry; return 0 on success or an error on
282 * failure.
283 */
284 static u_short
285 ifindex_alloc(void)
286 {
287 u_short idx;
288
289 IFNET_WLOCK_ASSERT();
290 retry:
291 /*
292 * Try to find an empty slot below V_if_index. If we fail, take the
293 * next slot.
294 */
295 for (idx = 1; idx <= V_if_index; idx++) {
296 if (V_ifindex_table[idx] == NULL)
297 break;
298 }
299
300 /* Catch if_index overflow. */
301 if (idx >= V_if_indexlim) {
302 if_grow();
303 goto retry;
304 }
305 if (idx > V_if_index)
306 V_if_index = idx;
307 return (idx);
308 }
309
310 static void
311 ifindex_free_locked(u_short idx)
312 {
313
314 IFNET_WLOCK_ASSERT();
315
316 V_ifindex_table[idx] = NULL;
317 while (V_if_index > 0 &&
318 V_ifindex_table[V_if_index] == NULL)
319 V_if_index--;
320 }
321
322 static void
323 ifindex_free(u_short idx)
324 {
325
326 IFNET_WLOCK();
327 ifindex_free_locked(idx);
328 IFNET_WUNLOCK();
329 }
330
331 static void
332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
333 {
334
335 IFNET_WLOCK_ASSERT();
336
337 V_ifindex_table[idx] = ifp;
338 }
339
340 static void
341 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
342 {
343
344 IFNET_WLOCK();
345 ifnet_setbyindex_locked(idx, ifp);
346 IFNET_WUNLOCK();
347 }
348
349 struct ifaddr *
350 ifaddr_byindex(u_short idx)
351 {
352 struct ifnet *ifp;
353 struct ifaddr *ifa = NULL;
354
355 IFNET_RLOCK_NOSLEEP();
356 ifp = ifnet_byindex_locked(idx);
357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
358 ifa_ref(ifa);
359 IFNET_RUNLOCK_NOSLEEP();
360 return (ifa);
361 }
362
363 /*
364 * Network interface utility routines.
365 *
366 * Routines with ifa_ifwith* names take sockaddr *'s as
367 * parameters.
368 */
369
370 static void
371 vnet_if_init(const void *unused __unused)
372 {
373
374 TAILQ_INIT(&V_ifnet);
375 TAILQ_INIT(&V_ifg_head);
376 IFNET_WLOCK();
377 if_grow(); /* create initial table */
378 IFNET_WUNLOCK();
379 vnet_if_clone_init();
380 }
381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
382 NULL);
383
384 #ifdef VIMAGE
385 static void
386 vnet_if_uninit(const void *unused __unused)
387 {
388
389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
390 "not empty", __func__, __LINE__, &V_ifnet));
391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
392 "not empty", __func__, __LINE__, &V_ifg_head));
393
394 free((caddr_t)V_ifindex_table, M_IFNET);
395 }
396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
397 vnet_if_uninit, NULL);
398
399 static void
400 vnet_if_return(const void *unused __unused)
401 {
402 struct ifnet *ifp, *nifp;
403
404 /* Return all inherited interfaces to their parent vnets. */
405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
406 if (ifp->if_home_vnet != ifp->if_vnet)
407 if_vmove(ifp, ifp->if_home_vnet);
408 }
409 }
410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
411 vnet_if_return, NULL);
412 #endif
413
414 static void
415 if_grow(void)
416 {
417 int oldlim;
418 u_int n;
419 struct ifnet **e;
420
421 IFNET_WLOCK_ASSERT();
422 oldlim = V_if_indexlim;
423 IFNET_WUNLOCK();
424 n = (oldlim << 1) * sizeof(*e);
425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
426 IFNET_WLOCK();
427 if (V_if_indexlim != oldlim) {
428 free(e, M_IFNET);
429 return;
430 }
431 if (V_ifindex_table != NULL) {
432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
433 free((caddr_t)V_ifindex_table, M_IFNET);
434 }
435 V_if_indexlim <<= 1;
436 V_ifindex_table = e;
437 }
438
439 /*
440 * Allocate a struct ifnet and an index for an interface. A layer 2
441 * common structure will also be allocated if an allocation routine is
442 * registered for the passed type.
443 */
444 struct ifnet *
445 if_alloc(u_char type)
446 {
447 struct ifnet *ifp;
448 u_short idx;
449
450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
451 IFNET_WLOCK();
452 idx = ifindex_alloc();
453 ifnet_setbyindex_locked(idx, IFNET_HOLD);
454 IFNET_WUNLOCK();
455 ifp->if_index = idx;
456 ifp->if_type = type;
457 ifp->if_alloctype = type;
458 #ifdef VIMAGE
459 ifp->if_vnet = curvnet;
460 #endif
461 if (if_com_alloc[type] != NULL) {
462 ifp->if_l2com = if_com_alloc[type](type, ifp);
463 if (ifp->if_l2com == NULL) {
464 free(ifp, M_IFNET);
465 ifindex_free(idx);
466 return (NULL);
467 }
468 }
469
470 IF_ADDR_LOCK_INIT(ifp);
471 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
472 ifp->if_afdata_initialized = 0;
473 IF_AFDATA_LOCK_INIT(ifp);
474 TAILQ_INIT(&ifp->if_addrhead);
475 TAILQ_INIT(&ifp->if_multiaddrs);
476 TAILQ_INIT(&ifp->if_groups);
477 #ifdef MAC
478 mac_ifnet_init(ifp);
479 #endif
480 ifq_init(&ifp->if_snd, ifp);
481
482 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
483 for (int i = 0; i < IFCOUNTERS; i++)
484 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
485 ifp->if_get_counter = if_get_counter_default;
486 ifnet_setbyindex(ifp->if_index, ifp);
487 return (ifp);
488 }
489
490 /*
491 * Do the actual work of freeing a struct ifnet, and layer 2 common
492 * structure. This call is made when the last reference to an
493 * interface is released.
494 */
495 static void
496 if_free_internal(struct ifnet *ifp)
497 {
498
499 KASSERT((ifp->if_flags & IFF_DYING),
500 ("if_free_internal: interface not dying"));
501
502 if (if_com_free[ifp->if_alloctype] != NULL)
503 if_com_free[ifp->if_alloctype](ifp->if_l2com,
504 ifp->if_alloctype);
505
506 #ifdef MAC
507 mac_ifnet_destroy(ifp);
508 #endif /* MAC */
509 if (ifp->if_description != NULL)
510 free(ifp->if_description, M_IFDESCR);
511 IF_AFDATA_DESTROY(ifp);
512 IF_ADDR_LOCK_DESTROY(ifp);
513 ifq_delete(&ifp->if_snd);
514
515 for (int i = 0; i < IFCOUNTERS; i++)
516 counter_u64_free(ifp->if_counters[i]);
517
518 free(ifp, M_IFNET);
519 }
520
521 /*
522 * Deregister an interface and free the associated storage.
523 */
524 void
525 if_free(struct ifnet *ifp)
526 {
527
528 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
529
530 CURVNET_SET_QUIET(ifp->if_vnet);
531 IFNET_WLOCK();
532 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
533 ("%s: freeing unallocated ifnet", ifp->if_xname));
534
535 ifindex_free_locked(ifp->if_index);
536 IFNET_WUNLOCK();
537
538 if (refcount_release(&ifp->if_refcount))
539 if_free_internal(ifp);
540 CURVNET_RESTORE();
541 }
542
543 /*
544 * Interfaces to keep an ifnet type-stable despite the possibility of the
545 * driver calling if_free(). If there are additional references, we defer
546 * freeing the underlying data structure.
547 */
548 void
549 if_ref(struct ifnet *ifp)
550 {
551
552 /* We don't assert the ifnet list lock here, but arguably should. */
553 refcount_acquire(&ifp->if_refcount);
554 }
555
556 void
557 if_rele(struct ifnet *ifp)
558 {
559
560 if (!refcount_release(&ifp->if_refcount))
561 return;
562 if_free_internal(ifp);
563 }
564
565 void
566 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
567 {
568
569 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
570
571 if (ifq->ifq_maxlen == 0)
572 ifq->ifq_maxlen = ifqmaxlen;
573
574 ifq->altq_type = 0;
575 ifq->altq_disc = NULL;
576 ifq->altq_flags &= ALTQF_CANTCHANGE;
577 ifq->altq_tbr = NULL;
578 ifq->altq_ifp = ifp;
579 }
580
581 void
582 ifq_delete(struct ifaltq *ifq)
583 {
584 mtx_destroy(&ifq->ifq_mtx);
585 }
586
587 /*
588 * Perform generic interface initialization tasks and attach the interface
589 * to the list of "active" interfaces. If vmove flag is set on entry
590 * to if_attach_internal(), perform only a limited subset of initialization
591 * tasks, given that we are moving from one vnet to another an ifnet which
592 * has already been fully initialized.
593 *
594 * Note that if_detach_internal() removes group membership unconditionally
595 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
596 * Thus, when if_vmove() is applied to a cloned interface, group membership
597 * is lost while a cloned one always joins a group whose name is
598 * ifc->ifc_name. To recover this after if_detach_internal() and
599 * if_attach_internal(), the cloner should be specified to
600 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
601 * attempts to join a group whose name is ifc->ifc_name.
602 *
603 * XXX:
604 * - The decision to return void and thus require this function to
605 * succeed is questionable.
606 * - We should probably do more sanity checking. For instance we don't
607 * do anything to insure if_xname is unique or non-empty.
608 */
609 void
610 if_attach(struct ifnet *ifp)
611 {
612
613 if_attach_internal(ifp, 0, NULL);
614 }
615
616 /*
617 * Compute the least common TSO limit.
618 */
619 void
620 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
621 {
622 /*
623 * 1) If there is no limit currently, take the limit from
624 * the network adapter.
625 *
626 * 2) If the network adapter has a limit below the current
627 * limit, apply it.
628 */
629 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
630 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
631 pmax->tsomaxbytes = ifp->if_hw_tsomax;
632 }
633 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
634 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
635 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
636 }
637 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
638 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
639 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
640 }
641 }
642
643 /*
644 * Update TSO limit of a network adapter.
645 *
646 * Returns zero if no change. Else non-zero.
647 */
648 int
649 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
650 {
651 int retval = 0;
652 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
653 ifp->if_hw_tsomax = pmax->tsomaxbytes;
654 retval++;
655 }
656 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
657 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
658 retval++;
659 }
660 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
661 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
662 retval++;
663 }
664 return (retval);
665 }
666
667 static void
668 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
669 {
670 unsigned socksize, ifasize;
671 int namelen, masklen;
672 struct sockaddr_dl *sdl;
673 struct ifaddr *ifa;
674
675 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
676 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
677 ifp->if_xname);
678
679 #ifdef VIMAGE
680 ifp->if_vnet = curvnet;
681 if (ifp->if_home_vnet == NULL)
682 ifp->if_home_vnet = curvnet;
683 #endif
684
685 if_addgroup(ifp, IFG_ALL);
686
687 /* Restore group membership for cloned interfaces. */
688 if (vmove && ifc != NULL)
689 if_clone_addgroup(ifp, ifc);
690
691 getmicrotime(&ifp->if_lastchange);
692 ifp->if_epoch = time_uptime;
693
694 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
695 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
696 ("transmit and qflush must both either be set or both be NULL"));
697 if (ifp->if_transmit == NULL) {
698 ifp->if_transmit = if_transmit;
699 ifp->if_qflush = if_qflush;
700 }
701 if (ifp->if_input == NULL)
702 ifp->if_input = if_input_default;
703
704 if (ifp->if_requestencap == NULL)
705 ifp->if_requestencap = if_requestencap_default;
706
707 if (!vmove) {
708 #ifdef MAC
709 mac_ifnet_create(ifp);
710 #endif
711
712 /*
713 * Create a Link Level name for this device.
714 */
715 namelen = strlen(ifp->if_xname);
716 /*
717 * Always save enough space for any possiable name so we
718 * can do a rename in place later.
719 */
720 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
721 socksize = masklen + ifp->if_addrlen;
722 if (socksize < sizeof(*sdl))
723 socksize = sizeof(*sdl);
724 socksize = roundup2(socksize, sizeof(long));
725 ifasize = sizeof(*ifa) + 2 * socksize;
726 ifa = ifa_alloc(ifasize, M_WAITOK);
727 sdl = (struct sockaddr_dl *)(ifa + 1);
728 sdl->sdl_len = socksize;
729 sdl->sdl_family = AF_LINK;
730 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
731 sdl->sdl_nlen = namelen;
732 sdl->sdl_index = ifp->if_index;
733 sdl->sdl_type = ifp->if_type;
734 ifp->if_addr = ifa;
735 ifa->ifa_ifp = ifp;
736 ifa->ifa_rtrequest = link_rtrequest;
737 ifa->ifa_addr = (struct sockaddr *)sdl;
738 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
739 ifa->ifa_netmask = (struct sockaddr *)sdl;
740 sdl->sdl_len = masklen;
741 while (namelen != 0)
742 sdl->sdl_data[--namelen] = 0xff;
743 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
744 /* Reliably crash if used uninitialized. */
745 ifp->if_broadcastaddr = NULL;
746
747 if (ifp->if_type == IFT_ETHER) {
748 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
749 M_WAITOK | M_ZERO);
750 }
751
752 #if defined(INET) || defined(INET6)
753 /* Use defaults for TSO, if nothing is set */
754 if (ifp->if_hw_tsomax == 0 &&
755 ifp->if_hw_tsomaxsegcount == 0 &&
756 ifp->if_hw_tsomaxsegsize == 0) {
757 /*
758 * The TSO defaults needs to be such that an
759 * NFS mbuf list of 35 mbufs totalling just
760 * below 64K works and that a chain of mbufs
761 * can be defragged into at most 32 segments:
762 */
763 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
764 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
765 ifp->if_hw_tsomaxsegcount = 35;
766 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
767
768 /* XXX some drivers set IFCAP_TSO after ethernet attach */
769 if (ifp->if_capabilities & IFCAP_TSO) {
770 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
771 ifp->if_hw_tsomax,
772 ifp->if_hw_tsomaxsegcount,
773 ifp->if_hw_tsomaxsegsize);
774 }
775 }
776 #endif
777 }
778 #ifdef VIMAGE
779 else {
780 /*
781 * Update the interface index in the link layer address
782 * of the interface.
783 */
784 for (ifa = ifp->if_addr; ifa != NULL;
785 ifa = TAILQ_NEXT(ifa, ifa_link)) {
786 if (ifa->ifa_addr->sa_family == AF_LINK) {
787 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
788 sdl->sdl_index = ifp->if_index;
789 }
790 }
791 }
792 #endif
793
794 IFNET_WLOCK();
795 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
796 #ifdef VIMAGE
797 curvnet->vnet_ifcnt++;
798 #endif
799 IFNET_WUNLOCK();
800
801 if (domain_init_status >= 2)
802 if_attachdomain1(ifp);
803
804 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
805 if (IS_DEFAULT_VNET(curvnet))
806 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
807
808 /* Announce the interface. */
809 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
810 }
811
812 static void
813 if_attachdomain(void *dummy)
814 {
815 struct ifnet *ifp;
816
817 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
818 if_attachdomain1(ifp);
819 }
820 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
821 if_attachdomain, NULL);
822
823 static void
824 if_attachdomain1(struct ifnet *ifp)
825 {
826 struct domain *dp;
827
828 /*
829 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
830 * cannot lock ifp->if_afdata initialization, entirely.
831 */
832 IF_AFDATA_LOCK(ifp);
833 if (ifp->if_afdata_initialized >= domain_init_status) {
834 IF_AFDATA_UNLOCK(ifp);
835 log(LOG_WARNING, "%s called more than once on %s\n",
836 __func__, ifp->if_xname);
837 return;
838 }
839 ifp->if_afdata_initialized = domain_init_status;
840 IF_AFDATA_UNLOCK(ifp);
841
842 /* address family dependent data region */
843 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
844 for (dp = domains; dp; dp = dp->dom_next) {
845 if (dp->dom_ifattach)
846 ifp->if_afdata[dp->dom_family] =
847 (*dp->dom_ifattach)(ifp);
848 }
849 }
850
851 /*
852 * Remove any unicast or broadcast network addresses from an interface.
853 */
854 void
855 if_purgeaddrs(struct ifnet *ifp)
856 {
857 struct ifaddr *ifa, *next;
858
859 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */
860 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
861 if (ifa->ifa_addr->sa_family == AF_LINK)
862 continue;
863 #ifdef INET
864 /* XXX: Ugly!! ad hoc just for INET */
865 if (ifa->ifa_addr->sa_family == AF_INET) {
866 struct ifaliasreq ifr;
867
868 bzero(&ifr, sizeof(ifr));
869 ifr.ifra_addr = *ifa->ifa_addr;
870 if (ifa->ifa_dstaddr)
871 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
872 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
873 NULL) == 0)
874 continue;
875 }
876 #endif /* INET */
877 #ifdef INET6
878 if (ifa->ifa_addr->sa_family == AF_INET6) {
879 in6_purgeaddr(ifa);
880 /* ifp_addrhead is already updated */
881 continue;
882 }
883 #endif /* INET6 */
884 IF_ADDR_WLOCK(ifp);
885 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
886 IF_ADDR_WUNLOCK(ifp);
887 ifa_free(ifa);
888 }
889 }
890
891 /*
892 * Remove any multicast network addresses from an interface when an ifnet
893 * is going away.
894 */
895 static void
896 if_purgemaddrs(struct ifnet *ifp)
897 {
898 struct ifmultiaddr *ifma;
899 struct ifmultiaddr *next;
900
901 IF_ADDR_WLOCK(ifp);
902 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
903 if_delmulti_locked(ifp, ifma, 1);
904 IF_ADDR_WUNLOCK(ifp);
905 }
906
907 /*
908 * Detach an interface, removing it from the list of "active" interfaces.
909 * If vmove flag is set on entry to if_detach_internal(), perform only a
910 * limited subset of cleanup tasks, given that we are moving an ifnet from
911 * one vnet to another, where it must be fully operational.
912 *
913 * XXXRW: There are some significant questions about event ordering, and
914 * how to prevent things from starting to use the interface during detach.
915 */
916 void
917 if_detach(struct ifnet *ifp)
918 {
919
920 CURVNET_SET_QUIET(ifp->if_vnet);
921 if_detach_internal(ifp, 0, NULL);
922 CURVNET_RESTORE();
923 }
924
925 /*
926 * The vmove flag, if set, indicates that we are called from a callpath
927 * that is moving an interface to a different vnet instance.
928 *
929 * The shutdown flag, if set, indicates that we are called in the
930 * process of shutting down a vnet instance. Currently only the
931 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
932 * on a vnet instance shutdown without this flag being set, e.g., when
933 * the cloned interfaces are destoyed as first thing of teardown.
934 */
935 static int
936 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
937 {
938 struct ifaddr *ifa;
939 int i;
940 struct domain *dp;
941 struct ifnet *iter;
942 int found = 0;
943 #ifdef VIMAGE
944 int shutdown;
945
946 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
947 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
948 #endif
949 IFNET_WLOCK();
950 TAILQ_FOREACH(iter, &V_ifnet, if_link)
951 if (iter == ifp) {
952 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
953 found = 1;
954 break;
955 }
956 IFNET_WUNLOCK();
957 if (!found) {
958 /*
959 * While we would want to panic here, we cannot
960 * guarantee that the interface is indeed still on
961 * the list given we don't hold locks all the way.
962 */
963 return (ENOENT);
964 #if 0
965 if (vmove)
966 panic("%s: ifp=%p not on the ifnet tailq %p",
967 __func__, ifp, &V_ifnet);
968 else
969 return; /* XXX this should panic as well? */
970 #endif
971 }
972
973 /*
974 * At this point we know the interface still was on the ifnet list
975 * and we removed it so we are in a stable state.
976 */
977 #ifdef VIMAGE
978 curvnet->vnet_ifcnt--;
979 #endif
980
981 /*
982 * In any case (destroy or vmove) detach us from the groups
983 * and remove/wait for pending events on the taskq.
984 * XXX-BZ in theory an interface could still enqueue a taskq change?
985 */
986 if_delgroups(ifp);
987
988 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
989
990 /*
991 * Check if this is a cloned interface or not. Must do even if
992 * shutting down as a if_vmove_reclaim() would move the ifp and
993 * the if_clone_addgroup() will have a corrupted string overwise
994 * from a gibberish pointer.
995 */
996 if (vmove && ifcp != NULL)
997 *ifcp = if_clone_findifc(ifp);
998
999 if_down(ifp);
1000
1001 #ifdef VIMAGE
1002 /*
1003 * On VNET shutdown abort here as the stack teardown will do all
1004 * the work top-down for us.
1005 */
1006 if (shutdown) {
1007 /*
1008 * In case of a vmove we are done here without error.
1009 * If we would signal an error it would lead to the same
1010 * abort as if we did not find the ifnet anymore.
1011 * if_detach() calls us in void context and does not care
1012 * about an early abort notification, so life is splendid :)
1013 */
1014 goto finish_vnet_shutdown;
1015 }
1016 #endif
1017
1018 /*
1019 * At this point we are not tearing down a VNET and are either
1020 * going to destroy or vmove the interface and have to cleanup
1021 * accordingly.
1022 */
1023
1024 /*
1025 * Remove routes and flush queues.
1026 */
1027 #ifdef ALTQ
1028 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1029 altq_disable(&ifp->if_snd);
1030 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1031 altq_detach(&ifp->if_snd);
1032 #endif
1033
1034 if_purgeaddrs(ifp);
1035
1036 #ifdef INET
1037 in_ifdetach(ifp);
1038 #endif
1039
1040 #ifdef INET6
1041 /*
1042 * Remove all IPv6 kernel structs related to ifp. This should be done
1043 * before removing routing entries below, since IPv6 interface direct
1044 * routes are expected to be removed by the IPv6-specific kernel API.
1045 * Otherwise, the kernel will detect some inconsistency and bark it.
1046 */
1047 in6_ifdetach(ifp);
1048 #endif
1049 if_purgemaddrs(ifp);
1050
1051 /* Announce that the interface is gone. */
1052 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1053 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1054 if (IS_DEFAULT_VNET(curvnet))
1055 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1056
1057 if (!vmove) {
1058 /*
1059 * Prevent further calls into the device driver via ifnet.
1060 */
1061 if_dead(ifp);
1062
1063 /*
1064 * Remove link ifaddr pointer and maybe decrement if_index.
1065 * Clean up all addresses.
1066 */
1067 free(ifp->if_hw_addr, M_IFADDR);
1068 ifp->if_hw_addr = NULL;
1069 ifp->if_addr = NULL;
1070
1071 /* We can now free link ifaddr. */
1072 IF_ADDR_WLOCK(ifp);
1073 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
1074 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1075 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
1076 IF_ADDR_WUNLOCK(ifp);
1077 ifa_free(ifa);
1078 } else
1079 IF_ADDR_WUNLOCK(ifp);
1080 }
1081
1082 rt_flushifroutes(ifp);
1083
1084 #ifdef VIMAGE
1085 finish_vnet_shutdown:
1086 #endif
1087 /*
1088 * We cannot hold the lock over dom_ifdetach calls as they might
1089 * sleep, for example trying to drain a callout, thus open up the
1090 * theoretical race with re-attaching.
1091 */
1092 IF_AFDATA_LOCK(ifp);
1093 i = ifp->if_afdata_initialized;
1094 ifp->if_afdata_initialized = 0;
1095 IF_AFDATA_UNLOCK(ifp);
1096 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1097 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1098 (*dp->dom_ifdetach)(ifp,
1099 ifp->if_afdata[dp->dom_family]);
1100 ifp->if_afdata[dp->dom_family] = NULL;
1101 }
1102 }
1103
1104 return (0);
1105 }
1106
1107 #ifdef VIMAGE
1108 /*
1109 * if_vmove() performs a limited version of if_detach() in current
1110 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1111 * An attempt is made to shrink if_index in current vnet, find an
1112 * unused if_index in target vnet and calls if_grow() if necessary,
1113 * and finally find an unused if_xname for the target vnet.
1114 */
1115 static void
1116 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1117 {
1118 struct if_clone *ifc;
1119 u_int bif_dlt, bif_hdrlen;
1120 int rc;
1121
1122 /*
1123 * if_detach_internal() will call the eventhandler to notify
1124 * interface departure. That will detach if_bpf. We need to
1125 * safe the dlt and hdrlen so we can re-attach it later.
1126 */
1127 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1128
1129 /*
1130 * Detach from current vnet, but preserve LLADDR info, do not
1131 * mark as dead etc. so that the ifnet can be reattached later.
1132 * If we cannot find it, we lost the race to someone else.
1133 */
1134 rc = if_detach_internal(ifp, 1, &ifc);
1135 if (rc != 0)
1136 return;
1137
1138 /*
1139 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1140 * the if_index for that vnet if possible.
1141 *
1142 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1143 * or we'd lock on one vnet and unlock on another.
1144 */
1145 IFNET_WLOCK();
1146 ifindex_free_locked(ifp->if_index);
1147 IFNET_WUNLOCK();
1148
1149 /*
1150 * Perform interface-specific reassignment tasks, if provided by
1151 * the driver.
1152 */
1153 if (ifp->if_reassign != NULL)
1154 ifp->if_reassign(ifp, new_vnet, NULL);
1155
1156 /*
1157 * Switch to the context of the target vnet.
1158 */
1159 CURVNET_SET_QUIET(new_vnet);
1160
1161 IFNET_WLOCK();
1162 ifp->if_index = ifindex_alloc();
1163 ifnet_setbyindex_locked(ifp->if_index, ifp);
1164 IFNET_WUNLOCK();
1165
1166 if_attach_internal(ifp, 1, ifc);
1167
1168 if (ifp->if_bpf == NULL)
1169 bpfattach(ifp, bif_dlt, bif_hdrlen);
1170
1171 CURVNET_RESTORE();
1172 }
1173
1174 /*
1175 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1176 */
1177 static int
1178 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1179 {
1180 struct prison *pr;
1181 struct ifnet *difp;
1182 int shutdown;
1183
1184 /* Try to find the prison within our visibility. */
1185 sx_slock(&allprison_lock);
1186 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1187 sx_sunlock(&allprison_lock);
1188 if (pr == NULL)
1189 return (ENXIO);
1190 prison_hold_locked(pr);
1191 mtx_unlock(&pr->pr_mtx);
1192
1193 /* Do not try to move the iface from and to the same prison. */
1194 if (pr->pr_vnet == ifp->if_vnet) {
1195 prison_free(pr);
1196 return (EEXIST);
1197 }
1198
1199 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1200 /* XXX Lock interfaces to avoid races. */
1201 CURVNET_SET_QUIET(pr->pr_vnet);
1202 difp = ifunit(ifname);
1203 if (difp != NULL) {
1204 CURVNET_RESTORE();
1205 prison_free(pr);
1206 return (EEXIST);
1207 }
1208
1209 /* Make sure the VNET is stable. */
1210 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1211 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1212 if (shutdown) {
1213 CURVNET_RESTORE();
1214 prison_free(pr);
1215 return (EBUSY);
1216 }
1217 CURVNET_RESTORE();
1218
1219 /* Move the interface into the child jail/vnet. */
1220 if_vmove(ifp, pr->pr_vnet);
1221
1222 /* Report the new if_xname back to the userland. */
1223 sprintf(ifname, "%s", ifp->if_xname);
1224
1225 prison_free(pr);
1226 return (0);
1227 }
1228
1229 static int
1230 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1231 {
1232 struct prison *pr;
1233 struct vnet *vnet_dst;
1234 struct ifnet *ifp;
1235 int shutdown;
1236
1237 /* Try to find the prison within our visibility. */
1238 sx_slock(&allprison_lock);
1239 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1240 sx_sunlock(&allprison_lock);
1241 if (pr == NULL)
1242 return (ENXIO);
1243 prison_hold_locked(pr);
1244 mtx_unlock(&pr->pr_mtx);
1245
1246 /* Make sure the named iface exists in the source prison/vnet. */
1247 CURVNET_SET(pr->pr_vnet);
1248 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1249 if (ifp == NULL) {
1250 CURVNET_RESTORE();
1251 prison_free(pr);
1252 return (ENXIO);
1253 }
1254
1255 /* Do not try to move the iface from and to the same prison. */
1256 vnet_dst = TD_TO_VNET(td);
1257 if (vnet_dst == ifp->if_vnet) {
1258 CURVNET_RESTORE();
1259 prison_free(pr);
1260 return (EEXIST);
1261 }
1262
1263 /* Make sure the VNET is stable. */
1264 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET &&
1265 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
1266 if (shutdown) {
1267 CURVNET_RESTORE();
1268 prison_free(pr);
1269 return (EBUSY);
1270 }
1271
1272 /* Get interface back from child jail/vnet. */
1273 if_vmove(ifp, vnet_dst);
1274 CURVNET_RESTORE();
1275
1276 /* Report the new if_xname back to the userland. */
1277 sprintf(ifname, "%s", ifp->if_xname);
1278
1279 prison_free(pr);
1280 return (0);
1281 }
1282 #endif /* VIMAGE */
1283
1284 /*
1285 * Add a group to an interface
1286 */
1287 int
1288 if_addgroup(struct ifnet *ifp, const char *groupname)
1289 {
1290 struct ifg_list *ifgl;
1291 struct ifg_group *ifg = NULL;
1292 struct ifg_member *ifgm;
1293 int new = 0;
1294
1295 if (groupname[0] && groupname[strlen(groupname) - 1] >= '' &&
1296 groupname[strlen(groupname) - 1] <= '9')
1297 return (EINVAL);
1298
1299 IFNET_WLOCK();
1300 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1301 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1302 IFNET_WUNLOCK();
1303 return (EEXIST);
1304 }
1305
1306 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1307 M_NOWAIT)) == NULL) {
1308 IFNET_WUNLOCK();
1309 return (ENOMEM);
1310 }
1311
1312 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1313 M_TEMP, M_NOWAIT)) == NULL) {
1314 free(ifgl, M_TEMP);
1315 IFNET_WUNLOCK();
1316 return (ENOMEM);
1317 }
1318
1319 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1320 if (!strcmp(ifg->ifg_group, groupname))
1321 break;
1322
1323 if (ifg == NULL) {
1324 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1325 M_TEMP, M_NOWAIT)) == NULL) {
1326 free(ifgl, M_TEMP);
1327 free(ifgm, M_TEMP);
1328 IFNET_WUNLOCK();
1329 return (ENOMEM);
1330 }
1331 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1332 ifg->ifg_refcnt = 0;
1333 TAILQ_INIT(&ifg->ifg_members);
1334 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1335 new = 1;
1336 }
1337
1338 ifg->ifg_refcnt++;
1339 ifgl->ifgl_group = ifg;
1340 ifgm->ifgm_ifp = ifp;
1341
1342 IF_ADDR_WLOCK(ifp);
1343 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1344 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1345 IF_ADDR_WUNLOCK(ifp);
1346
1347 IFNET_WUNLOCK();
1348
1349 if (new)
1350 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1351 EVENTHANDLER_INVOKE(group_change_event, groupname);
1352
1353 return (0);
1354 }
1355
1356 /*
1357 * Remove a group from an interface
1358 */
1359 int
1360 if_delgroup(struct ifnet *ifp, const char *groupname)
1361 {
1362 struct ifg_list *ifgl;
1363 struct ifg_member *ifgm;
1364
1365 IFNET_WLOCK();
1366 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1367 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1368 break;
1369 if (ifgl == NULL) {
1370 IFNET_WUNLOCK();
1371 return (ENOENT);
1372 }
1373
1374 IF_ADDR_WLOCK(ifp);
1375 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1376 IF_ADDR_WUNLOCK(ifp);
1377
1378 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1379 if (ifgm->ifgm_ifp == ifp)
1380 break;
1381
1382 if (ifgm != NULL) {
1383 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1384 free(ifgm, M_TEMP);
1385 }
1386
1387 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1388 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1389 IFNET_WUNLOCK();
1390 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1391 free(ifgl->ifgl_group, M_TEMP);
1392 } else
1393 IFNET_WUNLOCK();
1394
1395 free(ifgl, M_TEMP);
1396
1397 EVENTHANDLER_INVOKE(group_change_event, groupname);
1398
1399 return (0);
1400 }
1401
1402 /*
1403 * Remove an interface from all groups
1404 */
1405 static void
1406 if_delgroups(struct ifnet *ifp)
1407 {
1408 struct ifg_list *ifgl;
1409 struct ifg_member *ifgm;
1410 char groupname[IFNAMSIZ];
1411
1412 IFNET_WLOCK();
1413 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1414 ifgl = TAILQ_FIRST(&ifp->if_groups);
1415
1416 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1417
1418 IF_ADDR_WLOCK(ifp);
1419 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1420 IF_ADDR_WUNLOCK(ifp);
1421
1422 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1423 if (ifgm->ifgm_ifp == ifp)
1424 break;
1425
1426 if (ifgm != NULL) {
1427 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1428 ifgm_next);
1429 free(ifgm, M_TEMP);
1430 }
1431
1432 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1433 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1434 IFNET_WUNLOCK();
1435 EVENTHANDLER_INVOKE(group_detach_event,
1436 ifgl->ifgl_group);
1437 free(ifgl->ifgl_group, M_TEMP);
1438 } else
1439 IFNET_WUNLOCK();
1440
1441 free(ifgl, M_TEMP);
1442
1443 EVENTHANDLER_INVOKE(group_change_event, groupname);
1444
1445 IFNET_WLOCK();
1446 }
1447 IFNET_WUNLOCK();
1448 }
1449
1450 /*
1451 * Stores all groups from an interface in memory pointed
1452 * to by data
1453 */
1454 static int
1455 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1456 {
1457 int len, error;
1458 struct ifg_list *ifgl;
1459 struct ifg_req ifgrq, *ifgp;
1460 struct ifgroupreq *ifgr = data;
1461
1462 if (ifgr->ifgr_len == 0) {
1463 IF_ADDR_RLOCK(ifp);
1464 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1465 ifgr->ifgr_len += sizeof(struct ifg_req);
1466 IF_ADDR_RUNLOCK(ifp);
1467 return (0);
1468 }
1469
1470 len = ifgr->ifgr_len;
1471 ifgp = ifgr->ifgr_groups;
1472 /* XXX: wire */
1473 IF_ADDR_RLOCK(ifp);
1474 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1475 if (len < sizeof(ifgrq)) {
1476 IF_ADDR_RUNLOCK(ifp);
1477 return (EINVAL);
1478 }
1479 bzero(&ifgrq, sizeof ifgrq);
1480 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1481 sizeof(ifgrq.ifgrq_group));
1482 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1483 IF_ADDR_RUNLOCK(ifp);
1484 return (error);
1485 }
1486 len -= sizeof(ifgrq);
1487 ifgp++;
1488 }
1489 IF_ADDR_RUNLOCK(ifp);
1490
1491 return (0);
1492 }
1493
1494 /*
1495 * Stores all members of a group in memory pointed to by data
1496 */
1497 static int
1498 if_getgroupmembers(struct ifgroupreq *data)
1499 {
1500 struct ifgroupreq *ifgr = data;
1501 struct ifg_group *ifg;
1502 struct ifg_member *ifgm;
1503 struct ifg_req ifgrq, *ifgp;
1504 int len, error;
1505
1506 IFNET_RLOCK();
1507 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1508 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1509 break;
1510 if (ifg == NULL) {
1511 IFNET_RUNLOCK();
1512 return (ENOENT);
1513 }
1514
1515 if (ifgr->ifgr_len == 0) {
1516 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1517 ifgr->ifgr_len += sizeof(ifgrq);
1518 IFNET_RUNLOCK();
1519 return (0);
1520 }
1521
1522 len = ifgr->ifgr_len;
1523 ifgp = ifgr->ifgr_groups;
1524 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1525 if (len < sizeof(ifgrq)) {
1526 IFNET_RUNLOCK();
1527 return (EINVAL);
1528 }
1529 bzero(&ifgrq, sizeof ifgrq);
1530 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1531 sizeof(ifgrq.ifgrq_member));
1532 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1533 IFNET_RUNLOCK();
1534 return (error);
1535 }
1536 len -= sizeof(ifgrq);
1537 ifgp++;
1538 }
1539 IFNET_RUNLOCK();
1540
1541 return (0);
1542 }
1543
1544 /*
1545 * Return counter values from counter(9)s stored in ifnet.
1546 */
1547 uint64_t
1548 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1549 {
1550
1551 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1552
1553 return (counter_u64_fetch(ifp->if_counters[cnt]));
1554 }
1555
1556 /*
1557 * Increase an ifnet counter. Usually used for counters shared
1558 * between the stack and a driver, but function supports them all.
1559 */
1560 void
1561 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1562 {
1563
1564 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1565
1566 counter_u64_add(ifp->if_counters[cnt], inc);
1567 }
1568
1569 /*
1570 * Copy data from ifnet to userland API structure if_data.
1571 */
1572 void
1573 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1574 {
1575
1576 ifd->ifi_type = ifp->if_type;
1577 ifd->ifi_physical = 0;
1578 ifd->ifi_addrlen = ifp->if_addrlen;
1579 ifd->ifi_hdrlen = ifp->if_hdrlen;
1580 ifd->ifi_link_state = ifp->if_link_state;
1581 ifd->ifi_vhid = 0;
1582 ifd->ifi_datalen = sizeof(struct if_data);
1583 ifd->ifi_mtu = ifp->if_mtu;
1584 ifd->ifi_metric = ifp->if_metric;
1585 ifd->ifi_baudrate = ifp->if_baudrate;
1586 ifd->ifi_hwassist = ifp->if_hwassist;
1587 ifd->ifi_epoch = ifp->if_epoch;
1588 ifd->ifi_lastchange = ifp->if_lastchange;
1589
1590 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1591 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1592 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1593 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1594 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1595 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1596 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1597 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1598 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1599 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1600 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1601 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1602 }
1603
1604 /*
1605 * Wrapper functions for struct ifnet address list locking macros. These are
1606 * used by kernel modules to avoid encoding programming interface or binary
1607 * interface assumptions that may be violated when kernel-internal locking
1608 * approaches change.
1609 */
1610 void
1611 if_addr_rlock(struct ifnet *ifp)
1612 {
1613
1614 IF_ADDR_RLOCK(ifp);
1615 }
1616
1617 void
1618 if_addr_runlock(struct ifnet *ifp)
1619 {
1620
1621 IF_ADDR_RUNLOCK(ifp);
1622 }
1623
1624 void
1625 if_maddr_rlock(if_t ifp)
1626 {
1627
1628 IF_ADDR_RLOCK((struct ifnet *)ifp);
1629 }
1630
1631 void
1632 if_maddr_runlock(if_t ifp)
1633 {
1634
1635 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1636 }
1637
1638 /*
1639 * Initialization, destruction and refcounting functions for ifaddrs.
1640 */
1641 struct ifaddr *
1642 ifa_alloc(size_t size, int flags)
1643 {
1644 struct ifaddr *ifa;
1645
1646 KASSERT(size >= sizeof(struct ifaddr),
1647 ("%s: invalid size %zu", __func__, size));
1648
1649 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1650 if (ifa == NULL)
1651 return (NULL);
1652
1653 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1654 goto fail;
1655 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1656 goto fail;
1657 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1658 goto fail;
1659 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1660 goto fail;
1661
1662 refcount_init(&ifa->ifa_refcnt, 1);
1663
1664 return (ifa);
1665
1666 fail:
1667 /* free(NULL) is okay */
1668 counter_u64_free(ifa->ifa_opackets);
1669 counter_u64_free(ifa->ifa_ipackets);
1670 counter_u64_free(ifa->ifa_obytes);
1671 counter_u64_free(ifa->ifa_ibytes);
1672 free(ifa, M_IFADDR);
1673
1674 return (NULL);
1675 }
1676
1677 void
1678 ifa_ref(struct ifaddr *ifa)
1679 {
1680
1681 refcount_acquire(&ifa->ifa_refcnt);
1682 }
1683
1684 void
1685 ifa_free(struct ifaddr *ifa)
1686 {
1687
1688 if (refcount_release(&ifa->ifa_refcnt)) {
1689 counter_u64_free(ifa->ifa_opackets);
1690 counter_u64_free(ifa->ifa_ipackets);
1691 counter_u64_free(ifa->ifa_obytes);
1692 counter_u64_free(ifa->ifa_ibytes);
1693 free(ifa, M_IFADDR);
1694 }
1695 }
1696
1697 static int
1698 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1699 struct sockaddr *ia)
1700 {
1701 int error;
1702 struct rt_addrinfo info;
1703 struct sockaddr_dl null_sdl;
1704 struct ifnet *ifp;
1705
1706 ifp = ifa->ifa_ifp;
1707
1708 bzero(&info, sizeof(info));
1709 if (cmd != RTM_DELETE)
1710 info.rti_ifp = V_loif;
1711 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1712 info.rti_info[RTAX_DST] = ia;
1713 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1714 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1715
1716 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1717
1718 if (error != 0)
1719 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1720 __func__, otype, if_name(ifp), error);
1721
1722 return (error);
1723 }
1724
1725 int
1726 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1727 {
1728
1729 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1730 }
1731
1732 int
1733 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1734 {
1735
1736 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1737 }
1738
1739 int
1740 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1741 {
1742
1743 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1744 }
1745
1746 /*
1747 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1748 * structs used to represent other address families, it is necessary
1749 * to perform a different comparison.
1750 */
1751
1752 #define sa_dl_equal(a1, a2) \
1753 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1754 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1755 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1756 CLLADDR((const struct sockaddr_dl *)(a2)), \
1757 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1758
1759 /*
1760 * Locate an interface based on a complete address.
1761 */
1762 /*ARGSUSED*/
1763 static struct ifaddr *
1764 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref)
1765 {
1766 struct ifnet *ifp;
1767 struct ifaddr *ifa;
1768
1769 IFNET_RLOCK_NOSLEEP();
1770 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1771 IF_ADDR_RLOCK(ifp);
1772 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1773 if (ifa->ifa_addr->sa_family != addr->sa_family)
1774 continue;
1775 if (sa_equal(addr, ifa->ifa_addr)) {
1776 if (getref)
1777 ifa_ref(ifa);
1778 IF_ADDR_RUNLOCK(ifp);
1779 goto done;
1780 }
1781 /* IP6 doesn't have broadcast */
1782 if ((ifp->if_flags & IFF_BROADCAST) &&
1783 ifa->ifa_broadaddr &&
1784 ifa->ifa_broadaddr->sa_len != 0 &&
1785 sa_equal(ifa->ifa_broadaddr, addr)) {
1786 if (getref)
1787 ifa_ref(ifa);
1788 IF_ADDR_RUNLOCK(ifp);
1789 goto done;
1790 }
1791 }
1792 IF_ADDR_RUNLOCK(ifp);
1793 }
1794 ifa = NULL;
1795 done:
1796 IFNET_RUNLOCK_NOSLEEP();
1797 return (ifa);
1798 }
1799
1800 struct ifaddr *
1801 ifa_ifwithaddr(const struct sockaddr *addr)
1802 {
1803
1804 return (ifa_ifwithaddr_internal(addr, 1));
1805 }
1806
1807 int
1808 ifa_ifwithaddr_check(const struct sockaddr *addr)
1809 {
1810
1811 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1812 }
1813
1814 /*
1815 * Locate an interface based on the broadcast address.
1816 */
1817 /* ARGSUSED */
1818 struct ifaddr *
1819 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1820 {
1821 struct ifnet *ifp;
1822 struct ifaddr *ifa;
1823
1824 IFNET_RLOCK_NOSLEEP();
1825 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1826 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1827 continue;
1828 IF_ADDR_RLOCK(ifp);
1829 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1830 if (ifa->ifa_addr->sa_family != addr->sa_family)
1831 continue;
1832 if ((ifp->if_flags & IFF_BROADCAST) &&
1833 ifa->ifa_broadaddr &&
1834 ifa->ifa_broadaddr->sa_len != 0 &&
1835 sa_equal(ifa->ifa_broadaddr, addr)) {
1836 ifa_ref(ifa);
1837 IF_ADDR_RUNLOCK(ifp);
1838 goto done;
1839 }
1840 }
1841 IF_ADDR_RUNLOCK(ifp);
1842 }
1843 ifa = NULL;
1844 done:
1845 IFNET_RUNLOCK_NOSLEEP();
1846 return (ifa);
1847 }
1848
1849 /*
1850 * Locate the point to point interface with a given destination address.
1851 */
1852 /*ARGSUSED*/
1853 struct ifaddr *
1854 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1855 {
1856 struct ifnet *ifp;
1857 struct ifaddr *ifa;
1858
1859 IFNET_RLOCK_NOSLEEP();
1860 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1861 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1862 continue;
1863 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1864 continue;
1865 IF_ADDR_RLOCK(ifp);
1866 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1867 if (ifa->ifa_addr->sa_family != addr->sa_family)
1868 continue;
1869 if (ifa->ifa_dstaddr != NULL &&
1870 sa_equal(addr, ifa->ifa_dstaddr)) {
1871 ifa_ref(ifa);
1872 IF_ADDR_RUNLOCK(ifp);
1873 goto done;
1874 }
1875 }
1876 IF_ADDR_RUNLOCK(ifp);
1877 }
1878 ifa = NULL;
1879 done:
1880 IFNET_RUNLOCK_NOSLEEP();
1881 return (ifa);
1882 }
1883
1884 /*
1885 * Find an interface on a specific network. If many, choice
1886 * is most specific found.
1887 */
1888 struct ifaddr *
1889 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1890 {
1891 struct ifnet *ifp;
1892 struct ifaddr *ifa;
1893 struct ifaddr *ifa_maybe = NULL;
1894 u_int af = addr->sa_family;
1895 const char *addr_data = addr->sa_data, *cplim;
1896
1897 /*
1898 * AF_LINK addresses can be looked up directly by their index number,
1899 * so do that if we can.
1900 */
1901 if (af == AF_LINK) {
1902 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
1903 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1904 return (ifaddr_byindex(sdl->sdl_index));
1905 }
1906
1907 /*
1908 * Scan though each interface, looking for ones that have addresses
1909 * in this address family and the requested fib. Maintain a reference
1910 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1911 * kept it stable when we move onto the next interface.
1912 */
1913 IFNET_RLOCK_NOSLEEP();
1914 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1915 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1916 continue;
1917 IF_ADDR_RLOCK(ifp);
1918 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1919 const char *cp, *cp2, *cp3;
1920
1921 if (ifa->ifa_addr->sa_family != af)
1922 next: continue;
1923 if (af == AF_INET &&
1924 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1925 /*
1926 * This is a bit broken as it doesn't
1927 * take into account that the remote end may
1928 * be a single node in the network we are
1929 * looking for.
1930 * The trouble is that we don't know the
1931 * netmask for the remote end.
1932 */
1933 if (ifa->ifa_dstaddr != NULL &&
1934 sa_equal(addr, ifa->ifa_dstaddr)) {
1935 ifa_ref(ifa);
1936 IF_ADDR_RUNLOCK(ifp);
1937 goto done;
1938 }
1939 } else {
1940 /*
1941 * Scan all the bits in the ifa's address.
1942 * If a bit dissagrees with what we are
1943 * looking for, mask it with the netmask
1944 * to see if it really matters.
1945 * (A byte at a time)
1946 */
1947 if (ifa->ifa_netmask == 0)
1948 continue;
1949 cp = addr_data;
1950 cp2 = ifa->ifa_addr->sa_data;
1951 cp3 = ifa->ifa_netmask->sa_data;
1952 cplim = ifa->ifa_netmask->sa_len
1953 + (char *)ifa->ifa_netmask;
1954 while (cp3 < cplim)
1955 if ((*cp++ ^ *cp2++) & *cp3++)
1956 goto next; /* next address! */
1957 /*
1958 * If the netmask of what we just found
1959 * is more specific than what we had before
1960 * (if we had one), or if the virtual status
1961 * of new prefix is better than of the old one,
1962 * then remember the new one before continuing
1963 * to search for an even better one.
1964 */
1965 if (ifa_maybe == NULL ||
1966 ifa_preferred(ifa_maybe, ifa) ||
1967 rn_refines((caddr_t)ifa->ifa_netmask,
1968 (caddr_t)ifa_maybe->ifa_netmask)) {
1969 if (ifa_maybe != NULL)
1970 ifa_free(ifa_maybe);
1971 ifa_maybe = ifa;
1972 ifa_ref(ifa_maybe);
1973 }
1974 }
1975 }
1976 IF_ADDR_RUNLOCK(ifp);
1977 }
1978 ifa = ifa_maybe;
1979 ifa_maybe = NULL;
1980 done:
1981 IFNET_RUNLOCK_NOSLEEP();
1982 if (ifa_maybe != NULL)
1983 ifa_free(ifa_maybe);
1984 return (ifa);
1985 }
1986
1987 /*
1988 * Find an interface address specific to an interface best matching
1989 * a given address.
1990 */
1991 struct ifaddr *
1992 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1993 {
1994 struct ifaddr *ifa;
1995 const char *cp, *cp2, *cp3;
1996 char *cplim;
1997 struct ifaddr *ifa_maybe = NULL;
1998 u_int af = addr->sa_family;
1999
2000 if (af >= AF_MAX)
2001 return (NULL);
2002 IF_ADDR_RLOCK(ifp);
2003 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2004 if (ifa->ifa_addr->sa_family != af)
2005 continue;
2006 if (ifa_maybe == NULL)
2007 ifa_maybe = ifa;
2008 if (ifa->ifa_netmask == 0) {
2009 if (sa_equal(addr, ifa->ifa_addr) ||
2010 (ifa->ifa_dstaddr &&
2011 sa_equal(addr, ifa->ifa_dstaddr)))
2012 goto done;
2013 continue;
2014 }
2015 if (ifp->if_flags & IFF_POINTOPOINT) {
2016 if (sa_equal(addr, ifa->ifa_dstaddr))
2017 goto done;
2018 } else {
2019 cp = addr->sa_data;
2020 cp2 = ifa->ifa_addr->sa_data;
2021 cp3 = ifa->ifa_netmask->sa_data;
2022 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2023 for (; cp3 < cplim; cp3++)
2024 if ((*cp++ ^ *cp2++) & *cp3)
2025 break;
2026 if (cp3 == cplim)
2027 goto done;
2028 }
2029 }
2030 ifa = ifa_maybe;
2031 done:
2032 if (ifa != NULL)
2033 ifa_ref(ifa);
2034 IF_ADDR_RUNLOCK(ifp);
2035 return (ifa);
2036 }
2037
2038 /*
2039 * See whether new ifa is better than current one:
2040 * 1) A non-virtual one is preferred over virtual.
2041 * 2) A virtual in master state preferred over any other state.
2042 *
2043 * Used in several address selecting functions.
2044 */
2045 int
2046 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2047 {
2048
2049 return (cur->ifa_carp && (!next->ifa_carp ||
2050 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2051 }
2052
2053 #include <net/if_llatbl.h>
2054
2055 /*
2056 * Default action when installing a route with a Link Level gateway.
2057 * Lookup an appropriate real ifa to point to.
2058 * This should be moved to /sys/net/link.c eventually.
2059 */
2060 static void
2061 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2062 {
2063 struct ifaddr *ifa, *oifa;
2064 struct sockaddr *dst;
2065 struct ifnet *ifp;
2066
2067 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
2068 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL))
2069 return;
2070 ifa = ifaof_ifpforaddr(dst, ifp);
2071 if (ifa) {
2072 oifa = rt->rt_ifa;
2073 rt->rt_ifa = ifa;
2074 ifa_free(oifa);
2075 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2076 ifa->ifa_rtrequest(cmd, rt, info);
2077 }
2078 }
2079
2080 struct sockaddr_dl *
2081 link_alloc_sdl(size_t size, int flags)
2082 {
2083
2084 return (malloc(size, M_TEMP, flags));
2085 }
2086
2087 void
2088 link_free_sdl(struct sockaddr *sa)
2089 {
2090 free(sa, M_TEMP);
2091 }
2092
2093 /*
2094 * Fills in given sdl with interface basic info.
2095 * Returns pointer to filled sdl.
2096 */
2097 struct sockaddr_dl *
2098 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2099 {
2100 struct sockaddr_dl *sdl;
2101
2102 sdl = (struct sockaddr_dl *)paddr;
2103 memset(sdl, 0, sizeof(struct sockaddr_dl));
2104 sdl->sdl_len = sizeof(struct sockaddr_dl);
2105 sdl->sdl_family = AF_LINK;
2106 sdl->sdl_index = ifp->if_index;
2107 sdl->sdl_type = iftype;
2108
2109 return (sdl);
2110 }
2111
2112 /*
2113 * Mark an interface down and notify protocols of
2114 * the transition.
2115 */
2116 static void
2117 if_unroute(struct ifnet *ifp, int flag, int fam)
2118 {
2119 struct ifaddr *ifa;
2120
2121 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2122
2123 ifp->if_flags &= ~flag;
2124 getmicrotime(&ifp->if_lastchange);
2125 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2126 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2127 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2128 ifp->if_qflush(ifp);
2129
2130 if (ifp->if_carp)
2131 (*carp_linkstate_p)(ifp);
2132 rt_ifmsg(ifp);
2133 }
2134
2135 /*
2136 * Mark an interface up and notify protocols of
2137 * the transition.
2138 */
2139 static void
2140 if_route(struct ifnet *ifp, int flag, int fam)
2141 {
2142 struct ifaddr *ifa;
2143
2144 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2145
2146 ifp->if_flags |= flag;
2147 getmicrotime(&ifp->if_lastchange);
2148 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2149 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2150 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2151 if (ifp->if_carp)
2152 (*carp_linkstate_p)(ifp);
2153 rt_ifmsg(ifp);
2154 #ifdef INET6
2155 in6_if_up(ifp);
2156 #endif
2157 }
2158
2159 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2160 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2161 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2162 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2163 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2164 int (*vlan_setcookie_p)(struct ifnet *, void *);
2165 void *(*vlan_cookie_p)(struct ifnet *);
2166
2167 /*
2168 * Handle a change in the interface link state. To avoid LORs
2169 * between driver lock and upper layer locks, as well as possible
2170 * recursions, we post event to taskqueue, and all job
2171 * is done in static do_link_state_change().
2172 */
2173 void
2174 if_link_state_change(struct ifnet *ifp, int link_state)
2175 {
2176 /* Return if state hasn't changed. */
2177 if (ifp->if_link_state == link_state)
2178 return;
2179
2180 ifp->if_link_state = link_state;
2181
2182 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2183 }
2184
2185 static void
2186 do_link_state_change(void *arg, int pending)
2187 {
2188 struct ifnet *ifp = (struct ifnet *)arg;
2189 int link_state = ifp->if_link_state;
2190 CURVNET_SET(ifp->if_vnet);
2191
2192 /* Notify that the link state has changed. */
2193 rt_ifmsg(ifp);
2194 if (ifp->if_vlantrunk != NULL)
2195 (*vlan_link_state_p)(ifp);
2196
2197 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2198 ifp->if_l2com != NULL)
2199 (*ng_ether_link_state_p)(ifp, link_state);
2200 if (ifp->if_carp)
2201 (*carp_linkstate_p)(ifp);
2202 if (ifp->if_bridge)
2203 (*bridge_linkstate_p)(ifp);
2204 if (ifp->if_lagg)
2205 (*lagg_linkstate_p)(ifp, link_state);
2206
2207 if (IS_DEFAULT_VNET(curvnet))
2208 devctl_notify("IFNET", ifp->if_xname,
2209 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2210 NULL);
2211 if (pending > 1)
2212 if_printf(ifp, "%d link states coalesced\n", pending);
2213 if (log_link_state_change)
2214 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2215 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2216 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2217 CURVNET_RESTORE();
2218 }
2219
2220 /*
2221 * Mark an interface down and notify protocols of
2222 * the transition.
2223 */
2224 void
2225 if_down(struct ifnet *ifp)
2226 {
2227
2228 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2229 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2230 }
2231
2232 /*
2233 * Mark an interface up and notify protocols of
2234 * the transition.
2235 */
2236 void
2237 if_up(struct ifnet *ifp)
2238 {
2239
2240 if_route(ifp, IFF_UP, AF_UNSPEC);
2241 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2242 }
2243
2244 /*
2245 * Flush an interface queue.
2246 */
2247 void
2248 if_qflush(struct ifnet *ifp)
2249 {
2250 struct mbuf *m, *n;
2251 struct ifaltq *ifq;
2252
2253 ifq = &ifp->if_snd;
2254 IFQ_LOCK(ifq);
2255 #ifdef ALTQ
2256 if (ALTQ_IS_ENABLED(ifq))
2257 ALTQ_PURGE(ifq);
2258 #endif
2259 n = ifq->ifq_head;
2260 while ((m = n) != NULL) {
2261 n = m->m_nextpkt;
2262 m_freem(m);
2263 }
2264 ifq->ifq_head = 0;
2265 ifq->ifq_tail = 0;
2266 ifq->ifq_len = 0;
2267 IFQ_UNLOCK(ifq);
2268 }
2269
2270 /*
2271 * Map interface name to interface structure pointer, with or without
2272 * returning a reference.
2273 */
2274 struct ifnet *
2275 ifunit_ref(const char *name)
2276 {
2277 struct ifnet *ifp;
2278
2279 IFNET_RLOCK_NOSLEEP();
2280 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2281 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2282 !(ifp->if_flags & IFF_DYING))
2283 break;
2284 }
2285 if (ifp != NULL)
2286 if_ref(ifp);
2287 IFNET_RUNLOCK_NOSLEEP();
2288 return (ifp);
2289 }
2290
2291 struct ifnet *
2292 ifunit(const char *name)
2293 {
2294 struct ifnet *ifp;
2295
2296 IFNET_RLOCK_NOSLEEP();
2297 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2298 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2299 break;
2300 }
2301 IFNET_RUNLOCK_NOSLEEP();
2302 return (ifp);
2303 }
2304
2305 /*
2306 * Hardware specific interface ioctls.
2307 */
2308 static int
2309 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2310 {
2311 struct ifreq *ifr;
2312 int error = 0, do_ifup = 0;
2313 int new_flags, temp_flags;
2314 size_t namelen, onamelen;
2315 size_t descrlen;
2316 char *descrbuf, *odescrbuf;
2317 char new_name[IFNAMSIZ];
2318 struct ifaddr *ifa;
2319 struct sockaddr_dl *sdl;
2320
2321 ifr = (struct ifreq *)data;
2322 switch (cmd) {
2323 case SIOCGIFINDEX:
2324 ifr->ifr_index = ifp->if_index;
2325 break;
2326
2327 case SIOCGIFFLAGS:
2328 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2329 ifr->ifr_flags = temp_flags & 0xffff;
2330 ifr->ifr_flagshigh = temp_flags >> 16;
2331 break;
2332
2333 case SIOCGIFCAP:
2334 ifr->ifr_reqcap = ifp->if_capabilities;
2335 ifr->ifr_curcap = ifp->if_capenable;
2336 break;
2337
2338 #ifdef MAC
2339 case SIOCGIFMAC:
2340 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2341 break;
2342 #endif
2343
2344 case SIOCGIFMETRIC:
2345 ifr->ifr_metric = ifp->if_metric;
2346 break;
2347
2348 case SIOCGIFMTU:
2349 ifr->ifr_mtu = ifp->if_mtu;
2350 break;
2351
2352 case SIOCGIFPHYS:
2353 /* XXXGL: did this ever worked? */
2354 ifr->ifr_phys = 0;
2355 break;
2356
2357 case SIOCGIFDESCR:
2358 error = 0;
2359 sx_slock(&ifdescr_sx);
2360 if (ifp->if_description == NULL)
2361 error = ENOMSG;
2362 else {
2363 /* space for terminating nul */
2364 descrlen = strlen(ifp->if_description) + 1;
2365 if (ifr->ifr_buffer.length < descrlen)
2366 ifr->ifr_buffer.buffer = NULL;
2367 else
2368 error = copyout(ifp->if_description,
2369 ifr->ifr_buffer.buffer, descrlen);
2370 ifr->ifr_buffer.length = descrlen;
2371 }
2372 sx_sunlock(&ifdescr_sx);
2373 break;
2374
2375 case SIOCSIFDESCR:
2376 error = priv_check(td, PRIV_NET_SETIFDESCR);
2377 if (error)
2378 return (error);
2379
2380 /*
2381 * Copy only (length-1) bytes to make sure that
2382 * if_description is always nul terminated. The
2383 * length parameter is supposed to count the
2384 * terminating nul in.
2385 */
2386 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2387 return (ENAMETOOLONG);
2388 else if (ifr->ifr_buffer.length == 0)
2389 descrbuf = NULL;
2390 else {
2391 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2392 M_WAITOK | M_ZERO);
2393 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2394 ifr->ifr_buffer.length - 1);
2395 if (error) {
2396 free(descrbuf, M_IFDESCR);
2397 break;
2398 }
2399 }
2400
2401 sx_xlock(&ifdescr_sx);
2402 odescrbuf = ifp->if_description;
2403 ifp->if_description = descrbuf;
2404 sx_xunlock(&ifdescr_sx);
2405
2406 getmicrotime(&ifp->if_lastchange);
2407 free(odescrbuf, M_IFDESCR);
2408 break;
2409
2410 case SIOCGIFFIB:
2411 ifr->ifr_fib = ifp->if_fib;
2412 break;
2413
2414 case SIOCSIFFIB:
2415 error = priv_check(td, PRIV_NET_SETIFFIB);
2416 if (error)
2417 return (error);
2418 if (ifr->ifr_fib >= rt_numfibs)
2419 return (EINVAL);
2420
2421 ifp->if_fib = ifr->ifr_fib;
2422 break;
2423
2424 case SIOCSIFFLAGS:
2425 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2426 if (error)
2427 return (error);
2428 /*
2429 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2430 * check, so we don't need special handling here yet.
2431 */
2432 new_flags = (ifr->ifr_flags & 0xffff) |
2433 (ifr->ifr_flagshigh << 16);
2434 if (ifp->if_flags & IFF_UP &&
2435 (new_flags & IFF_UP) == 0) {
2436 if_down(ifp);
2437 } else if (new_flags & IFF_UP &&
2438 (ifp->if_flags & IFF_UP) == 0) {
2439 do_ifup = 1;
2440 }
2441 /* See if permanently promiscuous mode bit is about to flip */
2442 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2443 if (new_flags & IFF_PPROMISC)
2444 ifp->if_flags |= IFF_PROMISC;
2445 else if (ifp->if_pcount == 0)
2446 ifp->if_flags &= ~IFF_PROMISC;
2447 if (log_promisc_mode_change)
2448 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2449 ifp->if_xname,
2450 ((new_flags & IFF_PPROMISC) ?
2451 "enabled" : "disabled"));
2452 }
2453 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2454 (new_flags &~ IFF_CANTCHANGE);
2455 if (ifp->if_ioctl) {
2456 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2457 }
2458 if (do_ifup)
2459 if_up(ifp);
2460 getmicrotime(&ifp->if_lastchange);
2461 break;
2462
2463 case SIOCSIFCAP:
2464 error = priv_check(td, PRIV_NET_SETIFCAP);
2465 if (error)
2466 return (error);
2467 if (ifp->if_ioctl == NULL)
2468 return (EOPNOTSUPP);
2469 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2470 return (EINVAL);
2471 error = (*ifp->if_ioctl)(ifp, cmd, data);
2472 if (error == 0)
2473 getmicrotime(&ifp->if_lastchange);
2474 break;
2475
2476 #ifdef MAC
2477 case SIOCSIFMAC:
2478 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2479 break;
2480 #endif
2481
2482 case SIOCSIFNAME:
2483 error = priv_check(td, PRIV_NET_SETIFNAME);
2484 if (error)
2485 return (error);
2486 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2487 if (error != 0)
2488 return (error);
2489 if (new_name[0] == '\0')
2490 return (EINVAL);
2491 if (new_name[IFNAMSIZ-1] != '\0') {
2492 new_name[IFNAMSIZ-1] = '\0';
2493 if (strlen(new_name) == IFNAMSIZ-1)
2494 return (EINVAL);
2495 }
2496 if (ifunit(new_name) != NULL)
2497 return (EEXIST);
2498
2499 /*
2500 * XXX: Locking. Nothing else seems to lock if_flags,
2501 * and there are numerous other races with the
2502 * ifunit() checks not being atomic with namespace
2503 * changes (renames, vmoves, if_attach, etc).
2504 */
2505 ifp->if_flags |= IFF_RENAMING;
2506
2507 /* Announce the departure of the interface. */
2508 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2509 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2510
2511 log(LOG_INFO, "%s: changing name to '%s'\n",
2512 ifp->if_xname, new_name);
2513
2514 IF_ADDR_WLOCK(ifp);
2515 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2516 ifa = ifp->if_addr;
2517 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2518 namelen = strlen(new_name);
2519 onamelen = sdl->sdl_nlen;
2520 /*
2521 * Move the address if needed. This is safe because we
2522 * allocate space for a name of length IFNAMSIZ when we
2523 * create this in if_attach().
2524 */
2525 if (namelen != onamelen) {
2526 bcopy(sdl->sdl_data + onamelen,
2527 sdl->sdl_data + namelen, sdl->sdl_alen);
2528 }
2529 bcopy(new_name, sdl->sdl_data, namelen);
2530 sdl->sdl_nlen = namelen;
2531 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2532 bzero(sdl->sdl_data, onamelen);
2533 while (namelen != 0)
2534 sdl->sdl_data[--namelen] = 0xff;
2535 IF_ADDR_WUNLOCK(ifp);
2536
2537 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2538 /* Announce the return of the interface. */
2539 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2540
2541 ifp->if_flags &= ~IFF_RENAMING;
2542 break;
2543
2544 #ifdef VIMAGE
2545 case SIOCSIFVNET:
2546 error = priv_check(td, PRIV_NET_SETIFVNET);
2547 if (error)
2548 return (error);
2549 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2550 break;
2551 #endif
2552
2553 case SIOCSIFMETRIC:
2554 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2555 if (error)
2556 return (error);
2557 ifp->if_metric = ifr->ifr_metric;
2558 getmicrotime(&ifp->if_lastchange);
2559 break;
2560
2561 case SIOCSIFPHYS:
2562 error = priv_check(td, PRIV_NET_SETIFPHYS);
2563 if (error)
2564 return (error);
2565 if (ifp->if_ioctl == NULL)
2566 return (EOPNOTSUPP);
2567 error = (*ifp->if_ioctl)(ifp, cmd, data);
2568 if (error == 0)
2569 getmicrotime(&ifp->if_lastchange);
2570 break;
2571
2572 case SIOCSIFMTU:
2573 {
2574 u_long oldmtu = ifp->if_mtu;
2575
2576 error = priv_check(td, PRIV_NET_SETIFMTU);
2577 if (error)
2578 return (error);
2579 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2580 return (EINVAL);
2581 if (ifp->if_ioctl == NULL)
2582 return (EOPNOTSUPP);
2583 error = (*ifp->if_ioctl)(ifp, cmd, data);
2584 if (error == 0) {
2585 getmicrotime(&ifp->if_lastchange);
2586 rt_ifmsg(ifp);
2587 }
2588 /*
2589 * If the link MTU changed, do network layer specific procedure.
2590 */
2591 if (ifp->if_mtu != oldmtu) {
2592 #ifdef INET6
2593 nd6_setmtu(ifp);
2594 #endif
2595 rt_updatemtu(ifp);
2596 }
2597 break;
2598 }
2599
2600 case SIOCADDMULTI:
2601 case SIOCDELMULTI:
2602 if (cmd == SIOCADDMULTI)
2603 error = priv_check(td, PRIV_NET_ADDMULTI);
2604 else
2605 error = priv_check(td, PRIV_NET_DELMULTI);
2606 if (error)
2607 return (error);
2608
2609 /* Don't allow group membership on non-multicast interfaces. */
2610 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2611 return (EOPNOTSUPP);
2612
2613 /* Don't let users screw up protocols' entries. */
2614 if (ifr->ifr_addr.sa_family != AF_LINK)
2615 return (EINVAL);
2616
2617 if (cmd == SIOCADDMULTI) {
2618 struct ifmultiaddr *ifma;
2619
2620 /*
2621 * Userland is only permitted to join groups once
2622 * via the if_addmulti() KPI, because it cannot hold
2623 * struct ifmultiaddr * between calls. It may also
2624 * lose a race while we check if the membership
2625 * already exists.
2626 */
2627 IF_ADDR_RLOCK(ifp);
2628 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2629 IF_ADDR_RUNLOCK(ifp);
2630 if (ifma != NULL)
2631 error = EADDRINUSE;
2632 else
2633 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2634 } else {
2635 error = if_delmulti(ifp, &ifr->ifr_addr);
2636 }
2637 if (error == 0)
2638 getmicrotime(&ifp->if_lastchange);
2639 break;
2640
2641 case SIOCSIFPHYADDR:
2642 case SIOCDIFPHYADDR:
2643 #ifdef INET6
2644 case SIOCSIFPHYADDR_IN6:
2645 #endif
2646 case SIOCSIFMEDIA:
2647 case SIOCSIFGENERIC:
2648 error = priv_check(td, PRIV_NET_HWIOCTL);
2649 if (error)
2650 return (error);
2651 if (ifp->if_ioctl == NULL)
2652 return (EOPNOTSUPP);
2653 error = (*ifp->if_ioctl)(ifp, cmd, data);
2654 if (error == 0)
2655 getmicrotime(&ifp->if_lastchange);
2656 break;
2657
2658 case SIOCGIFSTATUS:
2659 case SIOCGIFPSRCADDR:
2660 case SIOCGIFPDSTADDR:
2661 case SIOCGIFMEDIA:
2662 case SIOCGIFXMEDIA:
2663 case SIOCGIFGENERIC:
2664 if (ifp->if_ioctl == NULL)
2665 return (EOPNOTSUPP);
2666 error = (*ifp->if_ioctl)(ifp, cmd, data);
2667 break;
2668
2669 case SIOCSIFLLADDR:
2670 error = priv_check(td, PRIV_NET_SETLLADDR);
2671 if (error)
2672 return (error);
2673 error = if_setlladdr(ifp,
2674 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2675 break;
2676
2677 case SIOCGHWADDR:
2678 error = if_gethwaddr(ifp, ifr);
2679 break;
2680
2681 case SIOCAIFGROUP:
2682 {
2683 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2684
2685 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2686 if (error)
2687 return (error);
2688 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2689 return (error);
2690 break;
2691 }
2692
2693 case SIOCGIFGROUP:
2694 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2695 return (error);
2696 break;
2697
2698 case SIOCDIFGROUP:
2699 {
2700 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2701
2702 error = priv_check(td, PRIV_NET_DELIFGROUP);
2703 if (error)
2704 return (error);
2705 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2706 return (error);
2707 break;
2708 }
2709
2710 default:
2711 error = ENOIOCTL;
2712 break;
2713 }
2714 return (error);
2715 }
2716
2717 /* COMPAT_SVR4 */
2718 #define OSIOCGIFCONF _IOWR('i', 20, struct ifconf)
2719
2720 #ifdef COMPAT_FREEBSD32
2721 struct ifconf32 {
2722 int32_t ifc_len;
2723 union {
2724 uint32_t ifcu_buf;
2725 uint32_t ifcu_req;
2726 } ifc_ifcu;
2727 };
2728 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2729 #endif
2730
2731 /*
2732 * Interface ioctls.
2733 */
2734 int
2735 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2736 {
2737 struct ifnet *ifp;
2738 struct ifreq *ifr;
2739 int error;
2740 int oif_flags;
2741 #ifdef VIMAGE
2742 int shutdown;
2743 #endif
2744
2745 CURVNET_SET(so->so_vnet);
2746 #ifdef VIMAGE
2747 /* Make sure the VNET is stable. */
2748 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET &&
2749 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0;
2750 if (shutdown) {
2751 CURVNET_RESTORE();
2752 return (EBUSY);
2753 }
2754 #endif
2755
2756
2757 switch (cmd) {
2758 case SIOCGIFCONF:
2759 case OSIOCGIFCONF: /* COMPAT_SVR4 */
2760 error = ifconf(cmd, data);
2761 CURVNET_RESTORE();
2762 return (error);
2763
2764 #ifdef COMPAT_FREEBSD32
2765 case SIOCGIFCONF32:
2766 {
2767 struct ifconf32 *ifc32;
2768 struct ifconf ifc;
2769
2770 ifc32 = (struct ifconf32 *)data;
2771 ifc.ifc_len = ifc32->ifc_len;
2772 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2773
2774 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2775 CURVNET_RESTORE();
2776 if (error == 0)
2777 ifc32->ifc_len = ifc.ifc_len;
2778 return (error);
2779 }
2780 #endif
2781 }
2782 ifr = (struct ifreq *)data;
2783
2784 switch (cmd) {
2785 #ifdef VIMAGE
2786 case SIOCSIFRVNET:
2787 error = priv_check(td, PRIV_NET_SETIFVNET);
2788 if (error == 0)
2789 error = if_vmove_reclaim(td, ifr->ifr_name,
2790 ifr->ifr_jid);
2791 CURVNET_RESTORE();
2792 return (error);
2793 #endif
2794 case SIOCIFCREATE:
2795 case SIOCIFCREATE2:
2796 error = priv_check(td, PRIV_NET_IFCREATE);
2797 if (error == 0)
2798 error = if_clone_create(ifr->ifr_name,
2799 sizeof(ifr->ifr_name),
2800 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2801 CURVNET_RESTORE();
2802 return (error);
2803 case SIOCIFDESTROY:
2804 error = priv_check(td, PRIV_NET_IFDESTROY);
2805 if (error == 0)
2806 error = if_clone_destroy(ifr->ifr_name);
2807 CURVNET_RESTORE();
2808 return (error);
2809
2810 case SIOCIFGCLONERS:
2811 error = if_clone_list((struct if_clonereq *)data);
2812 CURVNET_RESTORE();
2813 return (error);
2814 case SIOCGIFGMEMB:
2815 error = if_getgroupmembers((struct ifgroupreq *)data);
2816 CURVNET_RESTORE();
2817 return (error);
2818 #if defined(INET) || defined(INET6)
2819 case SIOCSVH:
2820 case SIOCGVH:
2821 if (carp_ioctl_p == NULL)
2822 error = EPROTONOSUPPORT;
2823 else
2824 error = (*carp_ioctl_p)(ifr, cmd, td);
2825 CURVNET_RESTORE();
2826 return (error);
2827 #endif
2828 }
2829
2830 ifp = ifunit_ref(ifr->ifr_name);
2831 if (ifp == NULL) {
2832 CURVNET_RESTORE();
2833 return (ENXIO);
2834 }
2835
2836 error = ifhwioctl(cmd, ifp, data, td);
2837 if (error != ENOIOCTL) {
2838 if_rele(ifp);
2839 CURVNET_RESTORE();
2840 return (error);
2841 }
2842
2843 oif_flags = ifp->if_flags;
2844 if (so->so_proto == NULL) {
2845 if_rele(ifp);
2846 CURVNET_RESTORE();
2847 return (EOPNOTSUPP);
2848 }
2849
2850 /*
2851 * Pass the request on to the socket control method, and if the
2852 * latter returns EOPNOTSUPP, directly to the interface.
2853 *
2854 * Make an exception for the legacy SIOCSIF* requests. Drivers
2855 * trust SIOCSIFADDR et al to come from an already privileged
2856 * layer, and do not perform any credentials checks or input
2857 * validation.
2858 */
2859 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2860 ifp, td));
2861 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2862 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2863 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2864 error = (*ifp->if_ioctl)(ifp, cmd, data);
2865
2866 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2867 #ifdef INET6
2868 if (ifp->if_flags & IFF_UP)
2869 in6_if_up(ifp);
2870 #endif
2871 }
2872 if_rele(ifp);
2873 CURVNET_RESTORE();
2874 return (error);
2875 }
2876
2877 /*
2878 * The code common to handling reference counted flags,
2879 * e.g., in ifpromisc() and if_allmulti().
2880 * The "pflag" argument can specify a permanent mode flag to check,
2881 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2882 *
2883 * Only to be used on stack-owned flags, not driver-owned flags.
2884 */
2885 static int
2886 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2887 {
2888 struct ifreq ifr;
2889 int error;
2890 int oldflags, oldcount;
2891
2892 /* Sanity checks to catch programming errors */
2893 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2894 ("%s: setting driver-owned flag %d", __func__, flag));
2895
2896 if (onswitch)
2897 KASSERT(*refcount >= 0,
2898 ("%s: increment negative refcount %d for flag %d",
2899 __func__, *refcount, flag));
2900 else
2901 KASSERT(*refcount > 0,
2902 ("%s: decrement non-positive refcount %d for flag %d",
2903 __func__, *refcount, flag));
2904
2905 /* In case this mode is permanent, just touch refcount */
2906 if (ifp->if_flags & pflag) {
2907 *refcount += onswitch ? 1 : -1;
2908 return (0);
2909 }
2910
2911 /* Save ifnet parameters for if_ioctl() may fail */
2912 oldcount = *refcount;
2913 oldflags = ifp->if_flags;
2914
2915 /*
2916 * See if we aren't the only and touching refcount is enough.
2917 * Actually toggle interface flag if we are the first or last.
2918 */
2919 if (onswitch) {
2920 if ((*refcount)++)
2921 return (0);
2922 ifp->if_flags |= flag;
2923 } else {
2924 if (--(*refcount))
2925 return (0);
2926 ifp->if_flags &= ~flag;
2927 }
2928
2929 /* Call down the driver since we've changed interface flags */
2930 if (ifp->if_ioctl == NULL) {
2931 error = EOPNOTSUPP;
2932 goto recover;
2933 }
2934 ifr.ifr_flags = ifp->if_flags & 0xffff;
2935 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2936 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2937 if (error)
2938 goto recover;
2939 /* Notify userland that interface flags have changed */
2940 rt_ifmsg(ifp);
2941 return (0);
2942
2943 recover:
2944 /* Recover after driver error */
2945 *refcount = oldcount;
2946 ifp->if_flags = oldflags;
2947 return (error);
2948 }
2949
2950 /*
2951 * Set/clear promiscuous mode on interface ifp based on the truth value
2952 * of pswitch. The calls are reference counted so that only the first
2953 * "on" request actually has an effect, as does the final "off" request.
2954 * Results are undefined if the "off" and "on" requests are not matched.
2955 */
2956 int
2957 ifpromisc(struct ifnet *ifp, int pswitch)
2958 {
2959 int error;
2960 int oldflags = ifp->if_flags;
2961
2962 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2963 &ifp->if_pcount, pswitch);
2964 /* If promiscuous mode status has changed, log a message */
2965 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
2966 log_promisc_mode_change)
2967 log(LOG_INFO, "%s: promiscuous mode %s\n",
2968 ifp->if_xname,
2969 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2970 return (error);
2971 }
2972
2973 /*
2974 * Return interface configuration
2975 * of system. List may be used
2976 * in later ioctl's (above) to get
2977 * other information.
2978 */
2979 /*ARGSUSED*/
2980 static int
2981 ifconf(u_long cmd, caddr_t data)
2982 {
2983 struct ifconf *ifc = (struct ifconf *)data;
2984 struct ifnet *ifp;
2985 struct ifaddr *ifa;
2986 struct ifreq ifr;
2987 struct sbuf *sb;
2988 int error, full = 0, valid_len, max_len;
2989
2990 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2991 max_len = MAXPHYS - 1;
2992
2993 /* Prevent hostile input from being able to crash the system */
2994 if (ifc->ifc_len <= 0)
2995 return (EINVAL);
2996
2997 again:
2998 if (ifc->ifc_len <= max_len) {
2999 max_len = ifc->ifc_len;
3000 full = 1;
3001 }
3002 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3003 max_len = 0;
3004 valid_len = 0;
3005
3006 IFNET_RLOCK();
3007 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3008 int addrs;
3009
3010 /*
3011 * Zero the ifr_name buffer to make sure we don't
3012 * disclose the contents of the stack.
3013 */
3014 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
3015
3016 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3017 >= sizeof(ifr.ifr_name)) {
3018 sbuf_delete(sb);
3019 IFNET_RUNLOCK();
3020 return (ENAMETOOLONG);
3021 }
3022
3023 addrs = 0;
3024 IF_ADDR_RLOCK(ifp);
3025 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3026 struct sockaddr *sa = ifa->ifa_addr;
3027
3028 if (prison_if(curthread->td_ucred, sa) != 0)
3029 continue;
3030 addrs++;
3031 /* COMPAT_SVR4 */
3032 if (cmd == OSIOCGIFCONF) {
3033 struct osockaddr *osa =
3034 (struct osockaddr *)&ifr.ifr_addr;
3035 ifr.ifr_addr = *sa;
3036 osa->sa_family = sa->sa_family;
3037 sbuf_bcat(sb, &ifr, sizeof(ifr));
3038 max_len += sizeof(ifr);
3039 } else
3040 if (sa->sa_len <= sizeof(*sa)) {
3041 ifr.ifr_addr = *sa;
3042 sbuf_bcat(sb, &ifr, sizeof(ifr));
3043 max_len += sizeof(ifr);
3044 } else {
3045 sbuf_bcat(sb, &ifr,
3046 offsetof(struct ifreq, ifr_addr));
3047 max_len += offsetof(struct ifreq, ifr_addr);
3048 sbuf_bcat(sb, sa, sa->sa_len);
3049 max_len += sa->sa_len;
3050 }
3051
3052 if (sbuf_error(sb) == 0)
3053 valid_len = sbuf_len(sb);
3054 }
3055 IF_ADDR_RUNLOCK(ifp);
3056 if (addrs == 0) {
3057 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3058 sbuf_bcat(sb, &ifr, sizeof(ifr));
3059 max_len += sizeof(ifr);
3060
3061 if (sbuf_error(sb) == 0)
3062 valid_len = sbuf_len(sb);
3063 }
3064 }
3065 IFNET_RUNLOCK();
3066
3067 /*
3068 * If we didn't allocate enough space (uncommon), try again. If
3069 * we have already allocated as much space as we are allowed,
3070 * return what we've got.
3071 */
3072 if (valid_len != max_len && !full) {
3073 sbuf_delete(sb);
3074 goto again;
3075 }
3076
3077 ifc->ifc_len = valid_len;
3078 sbuf_finish(sb);
3079 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3080 sbuf_delete(sb);
3081 return (error);
3082 }
3083
3084 /*
3085 * Just like ifpromisc(), but for all-multicast-reception mode.
3086 */
3087 int
3088 if_allmulti(struct ifnet *ifp, int onswitch)
3089 {
3090
3091 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3092 }
3093
3094 struct ifmultiaddr *
3095 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3096 {
3097 struct ifmultiaddr *ifma;
3098
3099 IF_ADDR_LOCK_ASSERT(ifp);
3100
3101 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3102 if (sa->sa_family == AF_LINK) {
3103 if (sa_dl_equal(ifma->ifma_addr, sa))
3104 break;
3105 } else {
3106 if (sa_equal(ifma->ifma_addr, sa))
3107 break;
3108 }
3109 }
3110
3111 return ifma;
3112 }
3113
3114 /*
3115 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3116 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3117 * the ifnet multicast address list here, so the caller must do that and
3118 * other setup work (such as notifying the device driver). The reference
3119 * count is initialized to 1.
3120 */
3121 static struct ifmultiaddr *
3122 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3123 int mflags)
3124 {
3125 struct ifmultiaddr *ifma;
3126 struct sockaddr *dupsa;
3127
3128 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3129 M_ZERO);
3130 if (ifma == NULL)
3131 return (NULL);
3132
3133 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3134 if (dupsa == NULL) {
3135 free(ifma, M_IFMADDR);
3136 return (NULL);
3137 }
3138 bcopy(sa, dupsa, sa->sa_len);
3139 ifma->ifma_addr = dupsa;
3140
3141 ifma->ifma_ifp = ifp;
3142 ifma->ifma_refcount = 1;
3143 ifma->ifma_protospec = NULL;
3144
3145 if (llsa == NULL) {
3146 ifma->ifma_lladdr = NULL;
3147 return (ifma);
3148 }
3149
3150 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3151 if (dupsa == NULL) {
3152 free(ifma->ifma_addr, M_IFMADDR);
3153 free(ifma, M_IFMADDR);
3154 return (NULL);
3155 }
3156 bcopy(llsa, dupsa, llsa->sa_len);
3157 ifma->ifma_lladdr = dupsa;
3158
3159 return (ifma);
3160 }
3161
3162 /*
3163 * if_freemulti: free ifmultiaddr structure and possibly attached related
3164 * addresses. The caller is responsible for implementing reference
3165 * counting, notifying the driver, handling routing messages, and releasing
3166 * any dependent link layer state.
3167 */
3168 static void
3169 if_freemulti(struct ifmultiaddr *ifma)
3170 {
3171
3172 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3173 ifma->ifma_refcount));
3174
3175 if (ifma->ifma_lladdr != NULL)
3176 free(ifma->ifma_lladdr, M_IFMADDR);
3177 free(ifma->ifma_addr, M_IFMADDR);
3178 free(ifma, M_IFMADDR);
3179 }
3180
3181 /*
3182 * Register an additional multicast address with a network interface.
3183 *
3184 * - If the address is already present, bump the reference count on the
3185 * address and return.
3186 * - If the address is not link-layer, look up a link layer address.
3187 * - Allocate address structures for one or both addresses, and attach to the
3188 * multicast address list on the interface. If automatically adding a link
3189 * layer address, the protocol address will own a reference to the link
3190 * layer address, to be freed when it is freed.
3191 * - Notify the network device driver of an addition to the multicast address
3192 * list.
3193 *
3194 * 'sa' points to caller-owned memory with the desired multicast address.
3195 *
3196 * 'retifma' will be used to return a pointer to the resulting multicast
3197 * address reference, if desired.
3198 */
3199 int
3200 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3201 struct ifmultiaddr **retifma)
3202 {
3203 struct ifmultiaddr *ifma, *ll_ifma;
3204 struct sockaddr *llsa;
3205 struct sockaddr_dl sdl;
3206 int error;
3207
3208 /*
3209 * If the address is already present, return a new reference to it;
3210 * otherwise, allocate storage and set up a new address.
3211 */
3212 IF_ADDR_WLOCK(ifp);
3213 ifma = if_findmulti(ifp, sa);
3214 if (ifma != NULL) {
3215 ifma->ifma_refcount++;
3216 if (retifma != NULL)
3217 *retifma = ifma;
3218 IF_ADDR_WUNLOCK(ifp);
3219 return (0);
3220 }
3221
3222 /*
3223 * The address isn't already present; resolve the protocol address
3224 * into a link layer address, and then look that up, bump its
3225 * refcount or allocate an ifma for that also.
3226 * Most link layer resolving functions returns address data which
3227 * fits inside default sockaddr_dl structure. However callback
3228 * can allocate another sockaddr structure, in that case we need to
3229 * free it later.
3230 */
3231 llsa = NULL;
3232 ll_ifma = NULL;
3233 if (ifp->if_resolvemulti != NULL) {
3234 /* Provide called function with buffer size information */
3235 sdl.sdl_len = sizeof(sdl);
3236 llsa = (struct sockaddr *)&sdl;
3237 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3238 if (error)
3239 goto unlock_out;
3240 }
3241
3242 /*
3243 * Allocate the new address. Don't hook it up yet, as we may also
3244 * need to allocate a link layer multicast address.
3245 */
3246 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3247 if (ifma == NULL) {
3248 error = ENOMEM;
3249 goto free_llsa_out;
3250 }
3251
3252 /*
3253 * If a link layer address is found, we'll need to see if it's
3254 * already present in the address list, or allocate is as well.
3255 * When this block finishes, the link layer address will be on the
3256 * list.
3257 */
3258 if (llsa != NULL) {
3259 ll_ifma = if_findmulti(ifp, llsa);
3260 if (ll_ifma == NULL) {
3261 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3262 if (ll_ifma == NULL) {
3263 --ifma->ifma_refcount;
3264 if_freemulti(ifma);
3265 error = ENOMEM;
3266 goto free_llsa_out;
3267 }
3268 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3269 ifma_link);
3270 } else
3271 ll_ifma->ifma_refcount++;
3272 ifma->ifma_llifma = ll_ifma;
3273 }
3274
3275 /*
3276 * We now have a new multicast address, ifma, and possibly a new or
3277 * referenced link layer address. Add the primary address to the
3278 * ifnet address list.
3279 */
3280 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3281
3282 if (retifma != NULL)
3283 *retifma = ifma;
3284
3285 /*
3286 * Must generate the message while holding the lock so that 'ifma'
3287 * pointer is still valid.
3288 */
3289 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3290 IF_ADDR_WUNLOCK(ifp);
3291
3292 /*
3293 * We are certain we have added something, so call down to the
3294 * interface to let them know about it.
3295 */
3296 if (ifp->if_ioctl != NULL) {
3297 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3298 }
3299
3300 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3301 link_free_sdl(llsa);
3302
3303 return (0);
3304
3305 free_llsa_out:
3306 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3307 link_free_sdl(llsa);
3308
3309 unlock_out:
3310 IF_ADDR_WUNLOCK(ifp);
3311 return (error);
3312 }
3313
3314 /*
3315 * Delete a multicast group membership by network-layer group address.
3316 *
3317 * Returns ENOENT if the entry could not be found. If ifp no longer
3318 * exists, results are undefined. This entry point should only be used
3319 * from subsystems which do appropriate locking to hold ifp for the
3320 * duration of the call.
3321 * Network-layer protocol domains must use if_delmulti_ifma().
3322 */
3323 int
3324 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3325 {
3326 struct ifmultiaddr *ifma;
3327 int lastref;
3328 #ifdef INVARIANTS
3329 struct ifnet *oifp;
3330
3331 IFNET_RLOCK_NOSLEEP();
3332 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3333 if (ifp == oifp)
3334 break;
3335 if (ifp != oifp)
3336 ifp = NULL;
3337 IFNET_RUNLOCK_NOSLEEP();
3338
3339 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3340 #endif
3341 if (ifp == NULL)
3342 return (ENOENT);
3343
3344 IF_ADDR_WLOCK(ifp);
3345 lastref = 0;
3346 ifma = if_findmulti(ifp, sa);
3347 if (ifma != NULL)
3348 lastref = if_delmulti_locked(ifp, ifma, 0);
3349 IF_ADDR_WUNLOCK(ifp);
3350
3351 if (ifma == NULL)
3352 return (ENOENT);
3353
3354 if (lastref && ifp->if_ioctl != NULL) {
3355 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3356 }
3357
3358 return (0);
3359 }
3360
3361 /*
3362 * Delete all multicast group membership for an interface.
3363 * Should be used to quickly flush all multicast filters.
3364 */
3365 void
3366 if_delallmulti(struct ifnet *ifp)
3367 {
3368 struct ifmultiaddr *ifma;
3369 struct ifmultiaddr *next;
3370
3371 IF_ADDR_WLOCK(ifp);
3372 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3373 if_delmulti_locked(ifp, ifma, 0);
3374 IF_ADDR_WUNLOCK(ifp);
3375 }
3376
3377 /*
3378 * Delete a multicast group membership by group membership pointer.
3379 * Network-layer protocol domains must use this routine.
3380 *
3381 * It is safe to call this routine if the ifp disappeared.
3382 */
3383 void
3384 if_delmulti_ifma(struct ifmultiaddr *ifma)
3385 {
3386 struct ifnet *ifp;
3387 int lastref;
3388
3389 ifp = ifma->ifma_ifp;
3390 #ifdef DIAGNOSTIC
3391 if (ifp == NULL) {
3392 printf("%s: ifma_ifp seems to be detached\n", __func__);
3393 } else {
3394 struct ifnet *oifp;
3395
3396 IFNET_RLOCK_NOSLEEP();
3397 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3398 if (ifp == oifp)
3399 break;
3400 if (ifp != oifp) {
3401 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3402 ifp = NULL;
3403 }
3404 IFNET_RUNLOCK_NOSLEEP();
3405 }
3406 #endif
3407 /*
3408 * If and only if the ifnet instance exists: Acquire the address lock.
3409 */
3410 if (ifp != NULL)
3411 IF_ADDR_WLOCK(ifp);
3412
3413 lastref = if_delmulti_locked(ifp, ifma, 0);
3414
3415 if (ifp != NULL) {
3416 /*
3417 * If and only if the ifnet instance exists:
3418 * Release the address lock.
3419 * If the group was left: update the hardware hash filter.
3420 */
3421 IF_ADDR_WUNLOCK(ifp);
3422 if (lastref && ifp->if_ioctl != NULL) {
3423 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3424 }
3425 }
3426 }
3427
3428 /*
3429 * Perform deletion of network-layer and/or link-layer multicast address.
3430 *
3431 * Return 0 if the reference count was decremented.
3432 * Return 1 if the final reference was released, indicating that the
3433 * hardware hash filter should be reprogrammed.
3434 */
3435 static int
3436 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3437 {
3438 struct ifmultiaddr *ll_ifma;
3439
3440 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3441 KASSERT(ifma->ifma_ifp == ifp,
3442 ("%s: inconsistent ifp %p", __func__, ifp));
3443 IF_ADDR_WLOCK_ASSERT(ifp);
3444 }
3445
3446 ifp = ifma->ifma_ifp;
3447
3448 /*
3449 * If the ifnet is detaching, null out references to ifnet,
3450 * so that upper protocol layers will notice, and not attempt
3451 * to obtain locks for an ifnet which no longer exists. The
3452 * routing socket announcement must happen before the ifnet
3453 * instance is detached from the system.
3454 */
3455 if (detaching) {
3456 #ifdef DIAGNOSTIC
3457 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3458 #endif
3459 /*
3460 * ifp may already be nulled out if we are being reentered
3461 * to delete the ll_ifma.
3462 */
3463 if (ifp != NULL) {
3464 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3465 ifma->ifma_ifp = NULL;
3466 }
3467 }
3468
3469 if (--ifma->ifma_refcount > 0)
3470 return 0;
3471
3472 /*
3473 * If this ifma is a network-layer ifma, a link-layer ifma may
3474 * have been associated with it. Release it first if so.
3475 */
3476 ll_ifma = ifma->ifma_llifma;
3477 if (ll_ifma != NULL) {
3478 KASSERT(ifma->ifma_lladdr != NULL,
3479 ("%s: llifma w/o lladdr", __func__));
3480 if (detaching)
3481 ll_ifma->ifma_ifp = NULL; /* XXX */
3482 if (--ll_ifma->ifma_refcount == 0) {
3483 if (ifp != NULL) {
3484 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3485 ifma_link);
3486 }
3487 if_freemulti(ll_ifma);
3488 }
3489 }
3490
3491 if (ifp != NULL)
3492 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3493
3494 if_freemulti(ifma);
3495
3496 /*
3497 * The last reference to this instance of struct ifmultiaddr
3498 * was released; the hardware should be notified of this change.
3499 */
3500 return 1;
3501 }
3502
3503 /*
3504 * Set the link layer address on an interface.
3505 *
3506 * At this time we only support certain types of interfaces,
3507 * and we don't allow the length of the address to change.
3508 *
3509 * Set noinline to be dtrace-friendly
3510 */
3511 __noinline int
3512 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3513 {
3514 struct sockaddr_dl *sdl;
3515 struct ifaddr *ifa;
3516 struct ifreq ifr;
3517
3518 IF_ADDR_RLOCK(ifp);
3519 ifa = ifp->if_addr;
3520 if (ifa == NULL) {
3521 IF_ADDR_RUNLOCK(ifp);
3522 return (EINVAL);
3523 }
3524 ifa_ref(ifa);
3525 IF_ADDR_RUNLOCK(ifp);
3526 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3527 if (sdl == NULL) {
3528 ifa_free(ifa);
3529 return (EINVAL);
3530 }
3531 if (len != sdl->sdl_alen) { /* don't allow length to change */
3532 ifa_free(ifa);
3533 return (EINVAL);
3534 }
3535 switch (ifp->if_type) {
3536 case IFT_ETHER:
3537 case IFT_FDDI:
3538 case IFT_XETHER:
3539 case IFT_ISO88025:
3540 case IFT_L2VLAN:
3541 case IFT_BRIDGE:
3542 case IFT_ARCNET:
3543 case IFT_IEEE8023ADLAG:
3544 case IFT_IEEE80211:
3545 bcopy(lladdr, LLADDR(sdl), len);
3546 ifa_free(ifa);
3547 break;
3548 default:
3549 ifa_free(ifa);
3550 return (ENODEV);
3551 }
3552
3553 /*
3554 * If the interface is already up, we need
3555 * to re-init it in order to reprogram its
3556 * address filter.
3557 */
3558 if ((ifp->if_flags & IFF_UP) != 0) {
3559 if (ifp->if_ioctl) {
3560 ifp->if_flags &= ~IFF_UP;
3561 ifr.ifr_flags = ifp->if_flags & 0xffff;
3562 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3563 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3564 ifp->if_flags |= IFF_UP;
3565 ifr.ifr_flags = ifp->if_flags & 0xffff;
3566 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3567 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3568 }
3569 }
3570 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3571 return (0);
3572 }
3573
3574 /*
3575 * Compat function for handling basic encapsulation requests.
3576 * Not converted stacks (FDDI, IB, ..) supports traditional
3577 * output model: ARP (and other similar L2 protocols) are handled
3578 * inside output routine, arpresolve/nd6_resolve() returns MAC
3579 * address instead of full prepend.
3580 *
3581 * This function creates calculated header==MAC for IPv4/IPv6 and
3582 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3583 * address families.
3584 */
3585 static int
3586 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3587 {
3588
3589 if (req->rtype != IFENCAP_LL)
3590 return (EOPNOTSUPP);
3591
3592 if (req->bufsize < req->lladdr_len)
3593 return (ENOMEM);
3594
3595 switch (req->family) {
3596 case AF_INET:
3597 case AF_INET6:
3598 break;
3599 default:
3600 return (EAFNOSUPPORT);
3601 }
3602
3603 /* Copy lladdr to storage as is */
3604 memmove(req->buf, req->lladdr, req->lladdr_len);
3605 req->bufsize = req->lladdr_len;
3606 req->lladdr_off = 0;
3607
3608 return (0);
3609 }
3610
3611 /*
3612 * Get the link layer address that was read from the hardware at attach.
3613 *
3614 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3615 * their component interfaces as IFT_IEEE8023ADLAG.
3616 */
3617 int
3618 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3619 {
3620
3621 if (ifp->if_hw_addr == NULL)
3622 return (ENODEV);
3623
3624 switch (ifp->if_type) {
3625 case IFT_ETHER:
3626 case IFT_IEEE8023ADLAG:
3627 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3628 return (0);
3629 default:
3630 return (ENODEV);
3631 }
3632 }
3633
3634 /*
3635 * The name argument must be a pointer to storage which will last as
3636 * long as the interface does. For physical devices, the result of
3637 * device_get_name(dev) is a good choice and for pseudo-devices a
3638 * static string works well.
3639 */
3640 void
3641 if_initname(struct ifnet *ifp, const char *name, int unit)
3642 {
3643 ifp->if_dname = name;
3644 ifp->if_dunit = unit;
3645 if (unit != IF_DUNIT_NONE)
3646 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3647 else
3648 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3649 }
3650
3651 int
3652 if_printf(struct ifnet *ifp, const char * fmt, ...)
3653 {
3654 va_list ap;
3655 int retval;
3656
3657 retval = printf("%s: ", ifp->if_xname);
3658 va_start(ap, fmt);
3659 retval += vprintf(fmt, ap);
3660 va_end(ap);
3661 return (retval);
3662 }
3663
3664 void
3665 if_start(struct ifnet *ifp)
3666 {
3667
3668 (*(ifp)->if_start)(ifp);
3669 }
3670
3671 /*
3672 * Backwards compatibility interface for drivers
3673 * that have not implemented it
3674 */
3675 static int
3676 if_transmit(struct ifnet *ifp, struct mbuf *m)
3677 {
3678 int error;
3679
3680 IFQ_HANDOFF(ifp, m, error);
3681 return (error);
3682 }
3683
3684 static void
3685 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3686 {
3687
3688 m_freem(m);
3689 }
3690
3691 int
3692 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3693 {
3694 int active = 0;
3695
3696 IF_LOCK(ifq);
3697 if (_IF_QFULL(ifq)) {
3698 IF_UNLOCK(ifq);
3699 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3700 m_freem(m);
3701 return (0);
3702 }
3703 if (ifp != NULL) {
3704 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3705 if (m->m_flags & (M_BCAST|M_MCAST))
3706 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3707 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3708 }
3709 _IF_ENQUEUE(ifq, m);
3710 IF_UNLOCK(ifq);
3711 if (ifp != NULL && !active)
3712 (*(ifp)->if_start)(ifp);
3713 return (1);
3714 }
3715
3716 void
3717 if_register_com_alloc(u_char type,
3718 if_com_alloc_t *a, if_com_free_t *f)
3719 {
3720
3721 KASSERT(if_com_alloc[type] == NULL,
3722 ("if_register_com_alloc: %d already registered", type));
3723 KASSERT(if_com_free[type] == NULL,
3724 ("if_register_com_alloc: %d free already registered", type));
3725
3726 if_com_alloc[type] = a;
3727 if_com_free[type] = f;
3728 }
3729
3730 void
3731 if_deregister_com_alloc(u_char type)
3732 {
3733
3734 KASSERT(if_com_alloc[type] != NULL,
3735 ("if_deregister_com_alloc: %d not registered", type));
3736 KASSERT(if_com_free[type] != NULL,
3737 ("if_deregister_com_alloc: %d free not registered", type));
3738 if_com_alloc[type] = NULL;
3739 if_com_free[type] = NULL;
3740 }
3741
3742 /* API for driver access to network stack owned ifnet.*/
3743 uint64_t
3744 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3745 {
3746 uint64_t oldbrate;
3747
3748 oldbrate = ifp->if_baudrate;
3749 ifp->if_baudrate = baudrate;
3750 return (oldbrate);
3751 }
3752
3753 uint64_t
3754 if_getbaudrate(if_t ifp)
3755 {
3756
3757 return (((struct ifnet *)ifp)->if_baudrate);
3758 }
3759
3760 int
3761 if_setcapabilities(if_t ifp, int capabilities)
3762 {
3763 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3764 return (0);
3765 }
3766
3767 int
3768 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3769 {
3770 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3771 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3772
3773 return (0);
3774 }
3775
3776 int
3777 if_getcapabilities(if_t ifp)
3778 {
3779 return ((struct ifnet *)ifp)->if_capabilities;
3780 }
3781
3782 int
3783 if_setcapenable(if_t ifp, int capabilities)
3784 {
3785 ((struct ifnet *)ifp)->if_capenable = capabilities;
3786 return (0);
3787 }
3788
3789 int
3790 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3791 {
3792 if(setcap)
3793 ((struct ifnet *)ifp)->if_capenable |= setcap;
3794 if(clearcap)
3795 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3796
3797 return (0);
3798 }
3799
3800 const char *
3801 if_getdname(if_t ifp)
3802 {
3803 return ((struct ifnet *)ifp)->if_dname;
3804 }
3805
3806 int
3807 if_togglecapenable(if_t ifp, int togglecap)
3808 {
3809 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3810 return (0);
3811 }
3812
3813 int
3814 if_getcapenable(if_t ifp)
3815 {
3816 return ((struct ifnet *)ifp)->if_capenable;
3817 }
3818
3819 /*
3820 * This is largely undesirable because it ties ifnet to a device, but does
3821 * provide flexiblity for an embedded product vendor. Should be used with
3822 * the understanding that it violates the interface boundaries, and should be
3823 * a last resort only.
3824 */
3825 int
3826 if_setdev(if_t ifp, void *dev)
3827 {
3828 return (0);
3829 }
3830
3831 int
3832 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3833 {
3834 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3835 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3836
3837 return (0);
3838 }
3839
3840 int
3841 if_getdrvflags(if_t ifp)
3842 {
3843 return ((struct ifnet *)ifp)->if_drv_flags;
3844 }
3845
3846 int
3847 if_setdrvflags(if_t ifp, int flags)
3848 {
3849 ((struct ifnet *)ifp)->if_drv_flags = flags;
3850 return (0);
3851 }
3852
3853
3854 int
3855 if_setflags(if_t ifp, int flags)
3856 {
3857 ((struct ifnet *)ifp)->if_flags = flags;
3858 return (0);
3859 }
3860
3861 int
3862 if_setflagbits(if_t ifp, int set, int clear)
3863 {
3864 ((struct ifnet *)ifp)->if_flags |= set;
3865 ((struct ifnet *)ifp)->if_flags &= ~clear;
3866
3867 return (0);
3868 }
3869
3870 int
3871 if_getflags(if_t ifp)
3872 {
3873 return ((struct ifnet *)ifp)->if_flags;
3874 }
3875
3876 int
3877 if_clearhwassist(if_t ifp)
3878 {
3879 ((struct ifnet *)ifp)->if_hwassist = 0;
3880 return (0);
3881 }
3882
3883 int
3884 if_sethwassistbits(if_t ifp, int toset, int toclear)
3885 {
3886 ((struct ifnet *)ifp)->if_hwassist |= toset;
3887 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3888
3889 return (0);
3890 }
3891
3892 int
3893 if_sethwassist(if_t ifp, int hwassist_bit)
3894 {
3895 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3896 return (0);
3897 }
3898
3899 int
3900 if_gethwassist(if_t ifp)
3901 {
3902 return ((struct ifnet *)ifp)->if_hwassist;
3903 }
3904
3905 int
3906 if_setmtu(if_t ifp, int mtu)
3907 {
3908 ((struct ifnet *)ifp)->if_mtu = mtu;
3909 return (0);
3910 }
3911
3912 int
3913 if_getmtu(if_t ifp)
3914 {
3915 return ((struct ifnet *)ifp)->if_mtu;
3916 }
3917
3918 int
3919 if_getmtu_family(if_t ifp, int family)
3920 {
3921 struct domain *dp;
3922
3923 for (dp = domains; dp; dp = dp->dom_next) {
3924 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3925 return (dp->dom_ifmtu((struct ifnet *)ifp));
3926 }
3927
3928 return (((struct ifnet *)ifp)->if_mtu);
3929 }
3930
3931 int
3932 if_setsoftc(if_t ifp, void *softc)
3933 {
3934 ((struct ifnet *)ifp)->if_softc = softc;
3935 return (0);
3936 }
3937
3938 void *
3939 if_getsoftc(if_t ifp)
3940 {
3941 return ((struct ifnet *)ifp)->if_softc;
3942 }
3943
3944 void
3945 if_setrcvif(struct mbuf *m, if_t ifp)
3946 {
3947 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3948 }
3949
3950 void
3951 if_setvtag(struct mbuf *m, uint16_t tag)
3952 {
3953 m->m_pkthdr.ether_vtag = tag;
3954 }
3955
3956 uint16_t
3957 if_getvtag(struct mbuf *m)
3958 {
3959
3960 return (m->m_pkthdr.ether_vtag);
3961 }
3962
3963 int
3964 if_sendq_empty(if_t ifp)
3965 {
3966 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3967 }
3968
3969 struct ifaddr *
3970 if_getifaddr(if_t ifp)
3971 {
3972 return ((struct ifnet *)ifp)->if_addr;
3973 }
3974
3975 int
3976 if_getamcount(if_t ifp)
3977 {
3978 return ((struct ifnet *)ifp)->if_amcount;
3979 }
3980
3981
3982 int
3983 if_setsendqready(if_t ifp)
3984 {
3985 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3986 return (0);
3987 }
3988
3989 int
3990 if_setsendqlen(if_t ifp, int tx_desc_count)
3991 {
3992 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3993 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3994
3995 return (0);
3996 }
3997
3998 int
3999 if_vlantrunkinuse(if_t ifp)
4000 {
4001 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
4002 }
4003
4004 int
4005 if_input(if_t ifp, struct mbuf* sendmp)
4006 {
4007 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4008 return (0);
4009
4010 }
4011
4012 /* XXX */
4013 #ifndef ETH_ADDR_LEN
4014 #define ETH_ADDR_LEN 6
4015 #endif
4016
4017 int
4018 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
4019 {
4020 struct ifmultiaddr *ifma;
4021 uint8_t *lmta = (uint8_t *)mta;
4022 int mcnt = 0;
4023
4024 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4025 if (ifma->ifma_addr->sa_family != AF_LINK)
4026 continue;
4027
4028 if (mcnt == max)
4029 break;
4030
4031 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
4032 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
4033 mcnt++;
4034 }
4035 *cnt = mcnt;
4036
4037 return (0);
4038 }
4039
4040 int
4041 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
4042 {
4043 int error;
4044
4045 if_maddr_rlock(ifp);
4046 error = if_setupmultiaddr(ifp, mta, cnt, max);
4047 if_maddr_runlock(ifp);
4048 return (error);
4049 }
4050
4051 int
4052 if_multiaddr_count(if_t ifp, int max)
4053 {
4054 struct ifmultiaddr *ifma;
4055 int count;
4056
4057 count = 0;
4058 if_maddr_rlock(ifp);
4059 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
4060 if (ifma->ifma_addr->sa_family != AF_LINK)
4061 continue;
4062 count++;
4063 if (count == max)
4064 break;
4065 }
4066 if_maddr_runlock(ifp);
4067 return (count);
4068 }
4069
4070 int
4071 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
4072 {
4073 struct ifmultiaddr *ifma;
4074 int cnt = 0;
4075
4076 if_maddr_rlock(ifp);
4077 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4078 cnt += filter(arg, ifma, cnt);
4079 if_maddr_runlock(ifp);
4080 return (cnt);
4081 }
4082
4083 struct mbuf *
4084 if_dequeue(if_t ifp)
4085 {
4086 struct mbuf *m;
4087 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4088
4089 return (m);
4090 }
4091
4092 int
4093 if_sendq_prepend(if_t ifp, struct mbuf *m)
4094 {
4095 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4096 return (0);
4097 }
4098
4099 int
4100 if_setifheaderlen(if_t ifp, int len)
4101 {
4102 ((struct ifnet *)ifp)->if_hdrlen = len;
4103 return (0);
4104 }
4105
4106 caddr_t
4107 if_getlladdr(if_t ifp)
4108 {
4109 return (IF_LLADDR((struct ifnet *)ifp));
4110 }
4111
4112 void *
4113 if_gethandle(u_char type)
4114 {
4115 return (if_alloc(type));
4116 }
4117
4118 void
4119 if_bpfmtap(if_t ifh, struct mbuf *m)
4120 {
4121 struct ifnet *ifp = (struct ifnet *)ifh;
4122
4123 BPF_MTAP(ifp, m);
4124 }
4125
4126 void
4127 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4128 {
4129 struct ifnet *ifp = (struct ifnet *)ifh;
4130
4131 ETHER_BPF_MTAP(ifp, m);
4132 }
4133
4134 void
4135 if_vlancap(if_t ifh)
4136 {
4137 struct ifnet *ifp = (struct ifnet *)ifh;
4138 VLAN_CAPABILITIES(ifp);
4139 }
4140
4141 void
4142 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4143 {
4144 ((struct ifnet *)ifp)->if_init = init_fn;
4145 }
4146
4147 void
4148 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4149 {
4150 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4151 }
4152
4153 void
4154 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4155 {
4156 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4157 }
4158
4159 void
4160 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4161 {
4162 ((struct ifnet *)ifp)->if_transmit = start_fn;
4163 }
4164
4165 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4166 {
4167 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4168
4169 }
4170
4171 void
4172 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4173 {
4174
4175 ifp->if_get_counter = fn;
4176 }
4177
4178 /* Revisit these - These are inline functions originally. */
4179 int
4180 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4181 {
4182 return drbr_inuse(ifh, br);
4183 }
4184
4185 struct mbuf*
4186 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4187 {
4188 return drbr_dequeue(ifh, br);
4189 }
4190
4191 int
4192 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4193 {
4194 return drbr_needs_enqueue(ifh, br);
4195 }
4196
4197 int
4198 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4199 {
4200 return drbr_enqueue(ifh, br, m);
4201
4202 }
Cache object: cd085c2c12fd37768f53e3a67318c9f7
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