2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
37 #include <sys/param.h>
38 #include <sys/types.h>
40 #include <sys/malloc.h>
44 #include <sys/systm.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.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>
63 #include <machine/stdarg.h>
67 #include <net/ethernet.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>
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>
87 #include <netinet/if_ether.h>
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
93 #endif /* INET || INET6 */
95 #include <security/mac/mac_framework.h>
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
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");
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
108 /* Log link state change events */
109 static int log_link_state_change = 1;
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");
115 /* Interface description */
116 static unsigned int ifdescr_maxlen = 1024;
117 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
119 "administrative maximum length for interface description");
121 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
123 /* global sx for non-critical path ifdescr */
124 static struct sx ifdescr_sx;
125 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
127 void (*bridge_linkstate_p)(struct ifnet *ifp);
128 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
129 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
130 /* These are external hooks for CARP. */
131 void (*carp_linkstate_p)(struct ifnet *ifp);
132 void (*carp_demote_adj_p)(int, char *);
133 int (*carp_master_p)(struct ifaddr *);
134 #if defined(INET) || defined(INET6)
135 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
136 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
137 const struct sockaddr *sa);
138 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
139 int (*carp_attach_p)(struct ifaddr *, int);
140 void (*carp_detach_p)(struct ifaddr *);
143 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
146 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
147 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
148 const struct in6_addr *taddr);
151 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
154 * XXX: Style; these should be sorted alphabetically, and unprototyped
155 * static functions should be prototyped. Currently they are sorted by
158 static void if_attachdomain(void *);
159 static void if_attachdomain1(struct ifnet *);
160 static int ifconf(u_long, caddr_t);
161 static void if_freemulti(struct ifmultiaddr *);
162 static void if_grow(void);
163 static void if_input_default(struct ifnet *, struct mbuf *);
164 static void if_route(struct ifnet *, int flag, int fam);
165 static int if_setflag(struct ifnet *, int, int, int *, int);
166 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
167 static void if_unroute(struct ifnet *, int flag, int fam);
168 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
169 static int if_rtdel(struct radix_node *, void *);
170 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
171 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
172 static void do_link_state_change(void *, int);
173 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
174 static int if_getgroupmembers(struct ifgroupreq *);
175 static void if_delgroups(struct ifnet *);
176 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
177 static void if_detach_internal(struct ifnet *, int, struct if_clone **);
181 * XXX: declare here to avoid to include many inet6 related files..
182 * should be more generalized?
184 extern void nd6_setmtu(struct ifnet *);
187 VNET_DEFINE(int, if_index);
188 int ifqmaxlen = IFQ_MAXLEN;
189 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
190 VNET_DEFINE(struct ifgrouphead, ifg_head);
192 static VNET_DEFINE(int, if_indexlim) = 8;
194 /* Table of ifnet by index. */
195 VNET_DEFINE(struct ifnet **, ifindex_table);
197 #define V_if_indexlim VNET(if_indexlim)
198 #define V_ifindex_table VNET(ifindex_table)
201 * The global network interface list (V_ifnet) and related state (such as
202 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
203 * an rwlock. Either may be acquired shared to stablize the list, but both
204 * must be acquired writable to modify the list. This model allows us to
205 * both stablize the interface list during interrupt thread processing, but
206 * also to stablize it over long-running ioctls, without introducing priority
207 * inversions and deadlocks.
209 struct rwlock ifnet_rwlock;
210 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
211 struct sx ifnet_sxlock;
212 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
215 * The allocation of network interfaces is a rather non-atomic affair; we
216 * need to select an index before we are ready to expose the interface for
217 * use, so will use this pointer value to indicate reservation.
219 #define IFNET_HOLD (void *)(uintptr_t)(-1)
221 static if_com_alloc_t *if_com_alloc[256];
222 static if_com_free_t *if_com_free[256];
224 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
225 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
226 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
229 ifnet_byindex_locked(u_short idx)
232 if (idx > V_if_index)
234 if (V_ifindex_table[idx] == IFNET_HOLD)
236 return (V_ifindex_table[idx]);
240 ifnet_byindex(u_short idx)
244 IFNET_RLOCK_NOSLEEP();
245 ifp = ifnet_byindex_locked(idx);
246 IFNET_RUNLOCK_NOSLEEP();
251 ifnet_byindex_ref(u_short idx)
255 IFNET_RLOCK_NOSLEEP();
256 ifp = ifnet_byindex_locked(idx);
257 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
258 IFNET_RUNLOCK_NOSLEEP();
262 IFNET_RUNLOCK_NOSLEEP();
267 * Allocate an ifindex array entry; return 0 on success or an error on
275 IFNET_WLOCK_ASSERT();
278 * Try to find an empty slot below V_if_index. If we fail, take the
281 for (idx = 1; idx <= V_if_index; idx++) {
282 if (V_ifindex_table[idx] == NULL)
286 /* Catch if_index overflow. */
287 if (idx >= V_if_indexlim) {
291 if (idx > V_if_index)
297 ifindex_free_locked(u_short idx)
300 IFNET_WLOCK_ASSERT();
302 V_ifindex_table[idx] = NULL;
303 while (V_if_index > 0 &&
304 V_ifindex_table[V_if_index] == NULL)
309 ifindex_free(u_short idx)
313 ifindex_free_locked(idx);
318 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
321 IFNET_WLOCK_ASSERT();
323 V_ifindex_table[idx] = ifp;
327 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
331 ifnet_setbyindex_locked(idx, ifp);
336 ifaddr_byindex(u_short idx)
340 IFNET_RLOCK_NOSLEEP();
341 ifa = ifnet_byindex_locked(idx)->if_addr;
344 IFNET_RUNLOCK_NOSLEEP();
349 * Network interface utility routines.
351 * Routines with ifa_ifwith* names take sockaddr *'s as
356 vnet_if_init(const void *unused __unused)
359 TAILQ_INIT(&V_ifnet);
360 TAILQ_INIT(&V_ifg_head);
362 if_grow(); /* create initial table */
364 vnet_if_clone_init();
366 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
371 vnet_if_uninit(const void *unused __unused)
374 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
375 "not empty", __func__, __LINE__, &V_ifnet));
376 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
377 "not empty", __func__, __LINE__, &V_ifg_head));
379 free((caddr_t)V_ifindex_table, M_IFNET);
381 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
382 vnet_if_uninit, NULL);
392 IFNET_WLOCK_ASSERT();
393 oldlim = V_if_indexlim;
395 n = (oldlim << 1) * sizeof(*e);
396 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
398 if (V_if_indexlim != oldlim) {
402 if (V_ifindex_table != NULL) {
403 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
404 free((caddr_t)V_ifindex_table, M_IFNET);
411 * Allocate a struct ifnet and an index for an interface. A layer 2
412 * common structure will also be allocated if an allocation routine is
413 * registered for the passed type.
416 if_alloc(u_char type)
421 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
423 idx = ifindex_alloc();
424 ifnet_setbyindex_locked(idx, IFNET_HOLD);
428 ifp->if_alloctype = type;
429 if (if_com_alloc[type] != NULL) {
430 ifp->if_l2com = if_com_alloc[type](type, ifp);
431 if (ifp->if_l2com == NULL) {
438 IF_ADDR_LOCK_INIT(ifp);
439 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
440 ifp->if_afdata_initialized = 0;
441 IF_AFDATA_LOCK_INIT(ifp);
442 TAILQ_INIT(&ifp->if_addrhead);
443 TAILQ_INIT(&ifp->if_multiaddrs);
444 TAILQ_INIT(&ifp->if_groups);
448 ifq_init(&ifp->if_snd, ifp);
450 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
451 for (int i = 0; i < IFCOUNTERS; i++)
452 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
453 ifp->if_get_counter = if_get_counter_default;
454 ifnet_setbyindex(ifp->if_index, ifp);
459 * Do the actual work of freeing a struct ifnet, and layer 2 common
460 * structure. This call is made when the last reference to an
461 * interface is released.
464 if_free_internal(struct ifnet *ifp)
467 KASSERT((ifp->if_flags & IFF_DYING),
468 ("if_free_internal: interface not dying"));
470 if (if_com_free[ifp->if_alloctype] != NULL)
471 if_com_free[ifp->if_alloctype](ifp->if_l2com,
475 mac_ifnet_destroy(ifp);
477 if (ifp->if_description != NULL)
478 free(ifp->if_description, M_IFDESCR);
479 IF_AFDATA_DESTROY(ifp);
480 IF_ADDR_LOCK_DESTROY(ifp);
481 ifq_delete(&ifp->if_snd);
483 for (int i = 0; i < IFCOUNTERS; i++)
484 counter_u64_free(ifp->if_counters[i]);
490 * Deregister an interface and free the associated storage.
493 if_free(struct ifnet *ifp)
496 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
498 CURVNET_SET_QUIET(ifp->if_vnet);
500 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
501 ("%s: freeing unallocated ifnet", ifp->if_xname));
503 ifindex_free_locked(ifp->if_index);
506 if (refcount_release(&ifp->if_refcount))
507 if_free_internal(ifp);
512 * Interfaces to keep an ifnet type-stable despite the possibility of the
513 * driver calling if_free(). If there are additional references, we defer
514 * freeing the underlying data structure.
517 if_ref(struct ifnet *ifp)
520 /* We don't assert the ifnet list lock here, but arguably should. */
521 refcount_acquire(&ifp->if_refcount);
525 if_rele(struct ifnet *ifp)
528 if (!refcount_release(&ifp->if_refcount))
530 if_free_internal(ifp);
534 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
537 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
539 if (ifq->ifq_maxlen == 0)
540 ifq->ifq_maxlen = ifqmaxlen;
543 ifq->altq_disc = NULL;
544 ifq->altq_flags &= ALTQF_CANTCHANGE;
545 ifq->altq_tbr = NULL;
550 ifq_delete(struct ifaltq *ifq)
552 mtx_destroy(&ifq->ifq_mtx);
556 * Perform generic interface initalization tasks and attach the interface
557 * to the list of "active" interfaces. If vmove flag is set on entry
558 * to if_attach_internal(), perform only a limited subset of initialization
559 * tasks, given that we are moving from one vnet to another an ifnet which
560 * has already been fully initialized.
562 * Note that if_detach_internal() removes group membership unconditionally
563 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
564 * Thus, when if_vmove() is applied to a cloned interface, group membership
565 * is lost while a cloned one always joins a group whose name is
566 * ifc->ifc_name. To recover this after if_detach_internal() and
567 * if_attach_internal(), the cloner should be specified to
568 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
569 * attempts to join a group whose name is ifc->ifc_name.
572 * - The decision to return void and thus require this function to
573 * succeed is questionable.
574 * - We should probably do more sanity checking. For instance we don't
575 * do anything to insure if_xname is unique or non-empty.
578 if_attach(struct ifnet *ifp)
581 if_attach_internal(ifp, 0, NULL);
585 * Compute the least common TSO limit.
588 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
591 * 1) If there is no limit currently, take the limit from
592 * the network adapter.
594 * 2) If the network adapter has a limit below the current
597 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
598 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
599 pmax->tsomaxbytes = ifp->if_hw_tsomax;
601 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
602 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
603 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
605 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
606 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
607 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
612 * Update TSO limit of a network adapter.
614 * Returns zero if no change. Else non-zero.
617 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
620 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
621 ifp->if_hw_tsomax = pmax->tsomaxbytes;
624 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
625 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
628 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
629 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
636 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
638 unsigned socksize, ifasize;
639 int namelen, masklen;
640 struct sockaddr_dl *sdl;
643 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
644 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
648 ifp->if_vnet = curvnet;
649 if (ifp->if_home_vnet == NULL)
650 ifp->if_home_vnet = curvnet;
653 if_addgroup(ifp, IFG_ALL);
655 /* Restore group membership for cloned interfaces. */
656 if (vmove && ifc != NULL)
657 if_clone_addgroup(ifp, ifc);
659 getmicrotime(&ifp->if_lastchange);
660 ifp->if_epoch = time_uptime;
662 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
663 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
664 ("transmit and qflush must both either be set or both be NULL"));
665 if (ifp->if_transmit == NULL) {
666 ifp->if_transmit = if_transmit;
667 ifp->if_qflush = if_qflush;
669 if (ifp->if_input == NULL)
670 ifp->if_input = if_input_default;
674 mac_ifnet_create(ifp);
678 * Create a Link Level name for this device.
680 namelen = strlen(ifp->if_xname);
682 * Always save enough space for any possiable name so we
683 * can do a rename in place later.
685 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
686 socksize = masklen + ifp->if_addrlen;
687 if (socksize < sizeof(*sdl))
688 socksize = sizeof(*sdl);
689 socksize = roundup2(socksize, sizeof(long));
690 ifasize = sizeof(*ifa) + 2 * socksize;
691 ifa = ifa_alloc(ifasize, M_WAITOK);
692 sdl = (struct sockaddr_dl *)(ifa + 1);
693 sdl->sdl_len = socksize;
694 sdl->sdl_family = AF_LINK;
695 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
696 sdl->sdl_nlen = namelen;
697 sdl->sdl_index = ifp->if_index;
698 sdl->sdl_type = ifp->if_type;
701 ifa->ifa_rtrequest = link_rtrequest;
702 ifa->ifa_addr = (struct sockaddr *)sdl;
703 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
704 ifa->ifa_netmask = (struct sockaddr *)sdl;
705 sdl->sdl_len = masklen;
707 sdl->sdl_data[--namelen] = 0xff;
708 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
709 /* Reliably crash if used uninitialized. */
710 ifp->if_broadcastaddr = NULL;
712 #if defined(INET) || defined(INET6)
713 /* Use defaults for TSO, if nothing is set */
714 if (ifp->if_hw_tsomax == 0 &&
715 ifp->if_hw_tsomaxsegcount == 0 &&
716 ifp->if_hw_tsomaxsegsize == 0) {
718 * The TSO defaults needs to be such that an
719 * NFS mbuf list of 35 mbufs totalling just
720 * below 64K works and that a chain of mbufs
721 * can be defragged into at most 32 segments:
723 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
724 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
725 ifp->if_hw_tsomaxsegcount = 35;
726 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
728 /* XXX some drivers set IFCAP_TSO after ethernet attach */
729 if (ifp->if_capabilities & IFCAP_TSO) {
730 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
732 ifp->if_hw_tsomaxsegcount,
733 ifp->if_hw_tsomaxsegsize);
741 * Update the interface index in the link layer address
744 for (ifa = ifp->if_addr; ifa != NULL;
745 ifa = TAILQ_NEXT(ifa, ifa_link)) {
746 if (ifa->ifa_addr->sa_family == AF_LINK) {
747 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
748 sdl->sdl_index = ifp->if_index;
755 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
757 curvnet->vnet_ifcnt++;
761 if (domain_init_status >= 2)
762 if_attachdomain1(ifp);
764 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
765 if (IS_DEFAULT_VNET(curvnet))
766 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
768 /* Announce the interface. */
769 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
773 if_attachdomain(void *dummy)
777 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
778 if_attachdomain1(ifp);
780 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
781 if_attachdomain, NULL);
784 if_attachdomain1(struct ifnet *ifp)
789 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
790 * cannot lock ifp->if_afdata initialization, entirely.
792 if (IF_AFDATA_TRYLOCK(ifp) == 0)
794 if (ifp->if_afdata_initialized >= domain_init_status) {
795 IF_AFDATA_UNLOCK(ifp);
796 log(LOG_WARNING, "%s called more than once on %s\n",
797 __func__, ifp->if_xname);
800 ifp->if_afdata_initialized = domain_init_status;
801 IF_AFDATA_UNLOCK(ifp);
803 /* address family dependent data region */
804 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
805 for (dp = domains; dp; dp = dp->dom_next) {
806 if (dp->dom_ifattach)
807 ifp->if_afdata[dp->dom_family] =
808 (*dp->dom_ifattach)(ifp);
813 * Remove any unicast or broadcast network addresses from an interface.
816 if_purgeaddrs(struct ifnet *ifp)
818 struct ifaddr *ifa, *next;
820 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
821 if (ifa->ifa_addr->sa_family == AF_LINK)
824 /* XXX: Ugly!! ad hoc just for INET */
825 if (ifa->ifa_addr->sa_family == AF_INET) {
826 struct ifaliasreq ifr;
828 bzero(&ifr, sizeof(ifr));
829 ifr.ifra_addr = *ifa->ifa_addr;
830 if (ifa->ifa_dstaddr)
831 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
832 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
838 if (ifa->ifa_addr->sa_family == AF_INET6) {
840 /* ifp_addrhead is already updated */
844 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
850 * Remove any multicast network addresses from an interface when an ifnet
854 if_purgemaddrs(struct ifnet *ifp)
856 struct ifmultiaddr *ifma;
857 struct ifmultiaddr *next;
860 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
861 if_delmulti_locked(ifp, ifma, 1);
862 IF_ADDR_WUNLOCK(ifp);
866 * Detach an interface, removing it from the list of "active" interfaces.
867 * If vmove flag is set on entry to if_detach_internal(), perform only a
868 * limited subset of cleanup tasks, given that we are moving an ifnet from
869 * one vnet to another, where it must be fully operational.
871 * XXXRW: There are some significant questions about event ordering, and
872 * how to prevent things from starting to use the interface during detach.
875 if_detach(struct ifnet *ifp)
878 CURVNET_SET_QUIET(ifp->if_vnet);
879 if_detach_internal(ifp, 0, NULL);
884 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
887 struct radix_node_head *rnh;
894 TAILQ_FOREACH(iter, &V_ifnet, if_link)
896 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
902 curvnet->vnet_ifcnt--;
907 panic("%s: ifp=%p not on the ifnet tailq %p",
908 __func__, ifp, &V_ifnet);
910 return; /* XXX this should panic as well? */
913 /* Check if this is a cloned interface or not. */
914 if (vmove && ifcp != NULL)
915 *ifcp = if_clone_findifc(ifp);
918 * Remove/wait for pending events.
920 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
923 * Remove routes and flush queues.
927 if (ALTQ_IS_ENABLED(&ifp->if_snd))
928 altq_disable(&ifp->if_snd);
929 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
930 altq_detach(&ifp->if_snd);
941 * Remove all IPv6 kernel structs related to ifp. This should be done
942 * before removing routing entries below, since IPv6 interface direct
943 * routes are expected to be removed by the IPv6-specific kernel API.
944 * Otherwise, the kernel will detect some inconsistency and bark it.
950 /* Announce that the interface is gone. */
951 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
952 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
953 if (IS_DEFAULT_VNET(curvnet))
954 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
958 * Prevent further calls into the device driver via ifnet.
963 * Remove link ifaddr pointer and maybe decrement if_index.
964 * Clean up all addresses.
968 /* We can now free link ifaddr. */
969 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
970 ifa = TAILQ_FIRST(&ifp->if_addrhead);
971 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
977 * Delete all remaining routes using this interface
978 * Unfortuneatly the only way to do this is to slog through
979 * the entire routing table looking for routes which point
980 * to this interface...oh well...
982 for (i = 1; i <= AF_MAX; i++) {
983 for (j = 0; j < rt_numfibs; j++) {
984 rnh = rt_tables_get_rnh(j, i);
987 RADIX_NODE_HEAD_LOCK(rnh);
988 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
989 RADIX_NODE_HEAD_UNLOCK(rnh);
996 * We cannot hold the lock over dom_ifdetach calls as they might
997 * sleep, for example trying to drain a callout, thus open up the
998 * theoretical race with re-attaching.
1000 IF_AFDATA_LOCK(ifp);
1001 i = ifp->if_afdata_initialized;
1002 ifp->if_afdata_initialized = 0;
1003 IF_AFDATA_UNLOCK(ifp);
1004 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1005 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1006 (*dp->dom_ifdetach)(ifp,
1007 ifp->if_afdata[dp->dom_family]);
1013 * if_vmove() performs a limited version of if_detach() in current
1014 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1015 * An attempt is made to shrink if_index in current vnet, find an
1016 * unused if_index in target vnet and calls if_grow() if necessary,
1017 * and finally find an unused if_xname for the target vnet.
1020 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1022 struct if_clone *ifc;
1025 * Detach from current vnet, but preserve LLADDR info, do not
1026 * mark as dead etc. so that the ifnet can be reattached later.
1028 if_detach_internal(ifp, 1, &ifc);
1031 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1032 * the if_index for that vnet if possible.
1034 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1035 * or we'd lock on one vnet and unlock on another.
1038 ifindex_free_locked(ifp->if_index);
1042 * Perform interface-specific reassignment tasks, if provided by
1045 if (ifp->if_reassign != NULL)
1046 ifp->if_reassign(ifp, new_vnet, NULL);
1049 * Switch to the context of the target vnet.
1051 CURVNET_SET_QUIET(new_vnet);
1054 ifp->if_index = ifindex_alloc();
1055 ifnet_setbyindex_locked(ifp->if_index, ifp);
1058 if_attach_internal(ifp, 1, ifc);
1064 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1067 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1072 /* Try to find the prison within our visibility. */
1073 sx_slock(&allprison_lock);
1074 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1075 sx_sunlock(&allprison_lock);
1078 prison_hold_locked(pr);
1079 mtx_unlock(&pr->pr_mtx);
1081 /* Do not try to move the iface from and to the same prison. */
1082 if (pr->pr_vnet == ifp->if_vnet) {
1087 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1088 /* XXX Lock interfaces to avoid races. */
1089 CURVNET_SET_QUIET(pr->pr_vnet);
1090 difp = ifunit(ifname);
1097 /* Move the interface into the child jail/vnet. */
1098 if_vmove(ifp, pr->pr_vnet);
1100 /* Report the new if_xname back to the userland. */
1101 sprintf(ifname, "%s", ifp->if_xname);
1108 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1111 struct vnet *vnet_dst;
1114 /* Try to find the prison within our visibility. */
1115 sx_slock(&allprison_lock);
1116 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1117 sx_sunlock(&allprison_lock);
1120 prison_hold_locked(pr);
1121 mtx_unlock(&pr->pr_mtx);
1123 /* Make sure the named iface exists in the source prison/vnet. */
1124 CURVNET_SET(pr->pr_vnet);
1125 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1132 /* Do not try to move the iface from and to the same prison. */
1133 vnet_dst = TD_TO_VNET(td);
1134 if (vnet_dst == ifp->if_vnet) {
1140 /* Get interface back from child jail/vnet. */
1141 if_vmove(ifp, vnet_dst);
1144 /* Report the new if_xname back to the userland. */
1145 sprintf(ifname, "%s", ifp->if_xname);
1153 * Add a group to an interface
1156 if_addgroup(struct ifnet *ifp, const char *groupname)
1158 struct ifg_list *ifgl;
1159 struct ifg_group *ifg = NULL;
1160 struct ifg_member *ifgm;
1163 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1164 groupname[strlen(groupname) - 1] <= '9')
1168 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1169 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1174 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1175 M_NOWAIT)) == NULL) {
1180 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1181 M_TEMP, M_NOWAIT)) == NULL) {
1187 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1188 if (!strcmp(ifg->ifg_group, groupname))
1192 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1193 M_TEMP, M_NOWAIT)) == NULL) {
1199 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1200 ifg->ifg_refcnt = 0;
1201 TAILQ_INIT(&ifg->ifg_members);
1202 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1207 ifgl->ifgl_group = ifg;
1208 ifgm->ifgm_ifp = ifp;
1211 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1212 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1213 IF_ADDR_WUNLOCK(ifp);
1218 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1219 EVENTHANDLER_INVOKE(group_change_event, groupname);
1225 * Remove a group from an interface
1228 if_delgroup(struct ifnet *ifp, const char *groupname)
1230 struct ifg_list *ifgl;
1231 struct ifg_member *ifgm;
1234 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1235 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1243 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1244 IF_ADDR_WUNLOCK(ifp);
1246 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1247 if (ifgm->ifgm_ifp == ifp)
1251 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1255 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1256 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1258 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1259 free(ifgl->ifgl_group, M_TEMP);
1265 EVENTHANDLER_INVOKE(group_change_event, groupname);
1271 * Remove an interface from all groups
1274 if_delgroups(struct ifnet *ifp)
1276 struct ifg_list *ifgl;
1277 struct ifg_member *ifgm;
1278 char groupname[IFNAMSIZ];
1281 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1282 ifgl = TAILQ_FIRST(&ifp->if_groups);
1284 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1287 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1288 IF_ADDR_WUNLOCK(ifp);
1290 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1291 if (ifgm->ifgm_ifp == ifp)
1295 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1300 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1301 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1303 EVENTHANDLER_INVOKE(group_detach_event,
1305 free(ifgl->ifgl_group, M_TEMP);
1311 EVENTHANDLER_INVOKE(group_change_event, groupname);
1319 * Stores all groups from an interface in memory pointed
1323 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1326 struct ifg_list *ifgl;
1327 struct ifg_req ifgrq, *ifgp;
1328 struct ifgroupreq *ifgr = data;
1330 if (ifgr->ifgr_len == 0) {
1332 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1333 ifgr->ifgr_len += sizeof(struct ifg_req);
1334 IF_ADDR_RUNLOCK(ifp);
1338 len = ifgr->ifgr_len;
1339 ifgp = ifgr->ifgr_groups;
1342 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1343 if (len < sizeof(ifgrq)) {
1344 IF_ADDR_RUNLOCK(ifp);
1347 bzero(&ifgrq, sizeof ifgrq);
1348 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1349 sizeof(ifgrq.ifgrq_group));
1350 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1351 IF_ADDR_RUNLOCK(ifp);
1354 len -= sizeof(ifgrq);
1357 IF_ADDR_RUNLOCK(ifp);
1363 * Stores all members of a group in memory pointed to by data
1366 if_getgroupmembers(struct ifgroupreq *data)
1368 struct ifgroupreq *ifgr = data;
1369 struct ifg_group *ifg;
1370 struct ifg_member *ifgm;
1371 struct ifg_req ifgrq, *ifgp;
1375 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1376 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1383 if (ifgr->ifgr_len == 0) {
1384 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1385 ifgr->ifgr_len += sizeof(ifgrq);
1390 len = ifgr->ifgr_len;
1391 ifgp = ifgr->ifgr_groups;
1392 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1393 if (len < sizeof(ifgrq)) {
1397 bzero(&ifgrq, sizeof ifgrq);
1398 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1399 sizeof(ifgrq.ifgrq_member));
1400 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1404 len -= sizeof(ifgrq);
1413 * Delete Routes for a Network Interface
1415 * Called for each routing entry via the rnh->rnh_walktree() call above
1416 * to delete all route entries referencing a detaching network interface.
1419 * rn pointer to node in the routing table
1420 * arg argument passed to rnh->rnh_walktree() - detaching interface
1424 * errno failed - reason indicated
1428 if_rtdel(struct radix_node *rn, void *arg)
1430 struct rtentry *rt = (struct rtentry *)rn;
1431 struct ifnet *ifp = arg;
1434 if (rt->rt_ifp == ifp) {
1437 * Protect (sorta) against walktree recursion problems
1438 * with cloned routes
1440 if ((rt->rt_flags & RTF_UP) == 0)
1443 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1445 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED,
1446 (struct rtentry **) NULL, rt->rt_fibnum);
1448 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1456 * Return counter values from counter(9)s stored in ifnet.
1459 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1462 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1464 return (counter_u64_fetch(ifp->if_counters[cnt]));
1468 * Increase an ifnet counter. Usually used for counters shared
1469 * between the stack and a driver, but function supports them all.
1472 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1475 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1477 counter_u64_add(ifp->if_counters[cnt], inc);
1481 * Copy data from ifnet to userland API structure if_data.
1484 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1487 ifd->ifi_type = ifp->if_type;
1488 ifd->ifi_physical = 0;
1489 ifd->ifi_addrlen = ifp->if_addrlen;
1490 ifd->ifi_hdrlen = ifp->if_hdrlen;
1491 ifd->ifi_link_state = ifp->if_link_state;
1493 ifd->ifi_datalen = sizeof(struct if_data);
1494 ifd->ifi_mtu = ifp->if_mtu;
1495 ifd->ifi_metric = ifp->if_metric;
1496 ifd->ifi_baudrate = ifp->if_baudrate;
1497 ifd->ifi_hwassist = ifp->if_hwassist;
1498 ifd->ifi_epoch = ifp->if_epoch;
1499 ifd->ifi_lastchange = ifp->if_lastchange;
1501 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1502 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1503 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1504 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1505 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1506 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1507 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1508 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1509 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1510 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1511 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1512 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1516 * Wrapper functions for struct ifnet address list locking macros. These are
1517 * used by kernel modules to avoid encoding programming interface or binary
1518 * interface assumptions that may be violated when kernel-internal locking
1519 * approaches change.
1522 if_addr_rlock(struct ifnet *ifp)
1529 if_addr_runlock(struct ifnet *ifp)
1532 IF_ADDR_RUNLOCK(ifp);
1536 if_maddr_rlock(if_t ifp)
1539 IF_ADDR_RLOCK((struct ifnet *)ifp);
1543 if_maddr_runlock(if_t ifp)
1546 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1550 * Initialization, destruction and refcounting functions for ifaddrs.
1553 ifa_alloc(size_t size, int flags)
1557 KASSERT(size >= sizeof(struct ifaddr),
1558 ("%s: invalid size %zu", __func__, size));
1560 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1564 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1566 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1568 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1570 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1573 refcount_init(&ifa->ifa_refcnt, 1);
1578 /* free(NULL) is okay */
1579 counter_u64_free(ifa->ifa_opackets);
1580 counter_u64_free(ifa->ifa_ipackets);
1581 counter_u64_free(ifa->ifa_obytes);
1582 counter_u64_free(ifa->ifa_ibytes);
1583 free(ifa, M_IFADDR);
1589 ifa_ref(struct ifaddr *ifa)
1592 refcount_acquire(&ifa->ifa_refcnt);
1596 ifa_free(struct ifaddr *ifa)
1599 if (refcount_release(&ifa->ifa_refcnt)) {
1600 counter_u64_free(ifa->ifa_opackets);
1601 counter_u64_free(ifa->ifa_ipackets);
1602 counter_u64_free(ifa->ifa_obytes);
1603 counter_u64_free(ifa->ifa_ibytes);
1604 free(ifa, M_IFADDR);
1609 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1612 struct rtentry *rt = NULL;
1613 struct rt_addrinfo info;
1614 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
1616 bzero(&info, sizeof(info));
1617 info.rti_ifp = V_loif;
1618 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1619 info.rti_info[RTAX_DST] = ia;
1620 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1621 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib);
1623 if (error == 0 && rt != NULL) {
1625 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1626 ifa->ifa_ifp->if_type;
1627 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1628 ifa->ifa_ifp->if_index;
1631 } else if (error != 0)
1632 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error);
1638 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1641 struct rt_addrinfo info;
1642 struct sockaddr_dl null_sdl;
1644 bzero(&null_sdl, sizeof(null_sdl));
1645 null_sdl.sdl_len = sizeof(null_sdl);
1646 null_sdl.sdl_family = AF_LINK;
1647 null_sdl.sdl_type = ifa->ifa_ifp->if_type;
1648 null_sdl.sdl_index = ifa->ifa_ifp->if_index;
1649 bzero(&info, sizeof(info));
1650 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1651 info.rti_info[RTAX_DST] = ia;
1652 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1653 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib);
1656 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error);
1662 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *sa, int fib)
1666 rt = rtalloc1_fib(sa, 0, 0, fib);
1668 log(LOG_DEBUG, "%s: fail", __func__);
1669 return (EHOSTUNREACH);
1671 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1672 ifa->ifa_ifp->if_type;
1673 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1674 ifa->ifa_ifp->if_index;
1681 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1682 * structs used to represent other address families, it is necessary
1683 * to perform a different comparison.
1686 #define sa_dl_equal(a1, a2) \
1687 ((((struct sockaddr_dl *)(a1))->sdl_len == \
1688 ((struct sockaddr_dl *)(a2))->sdl_len) && \
1689 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
1690 LLADDR((struct sockaddr_dl *)(a2)), \
1691 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1694 * Locate an interface based on a complete address.
1697 static struct ifaddr *
1698 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref)
1703 IFNET_RLOCK_NOSLEEP();
1704 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1706 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1707 if (ifa->ifa_addr->sa_family != addr->sa_family)
1709 if (sa_equal(addr, ifa->ifa_addr)) {
1712 IF_ADDR_RUNLOCK(ifp);
1715 /* IP6 doesn't have broadcast */
1716 if ((ifp->if_flags & IFF_BROADCAST) &&
1717 ifa->ifa_broadaddr &&
1718 ifa->ifa_broadaddr->sa_len != 0 &&
1719 sa_equal(ifa->ifa_broadaddr, addr)) {
1722 IF_ADDR_RUNLOCK(ifp);
1726 IF_ADDR_RUNLOCK(ifp);
1730 IFNET_RUNLOCK_NOSLEEP();
1735 ifa_ifwithaddr(struct sockaddr *addr)
1738 return (ifa_ifwithaddr_internal(addr, 1));
1742 ifa_ifwithaddr_check(struct sockaddr *addr)
1745 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1749 * Locate an interface based on the broadcast address.
1753 ifa_ifwithbroadaddr(struct sockaddr *addr, int fibnum)
1758 IFNET_RLOCK_NOSLEEP();
1759 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1760 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1763 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1764 if (ifa->ifa_addr->sa_family != addr->sa_family)
1766 if ((ifp->if_flags & IFF_BROADCAST) &&
1767 ifa->ifa_broadaddr &&
1768 ifa->ifa_broadaddr->sa_len != 0 &&
1769 sa_equal(ifa->ifa_broadaddr, addr)) {
1771 IF_ADDR_RUNLOCK(ifp);
1775 IF_ADDR_RUNLOCK(ifp);
1779 IFNET_RUNLOCK_NOSLEEP();
1784 * Locate the point to point interface with a given destination address.
1788 ifa_ifwithdstaddr(struct sockaddr *addr, int fibnum)
1793 IFNET_RLOCK_NOSLEEP();
1794 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1795 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1797 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1800 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1801 if (ifa->ifa_addr->sa_family != addr->sa_family)
1803 if (ifa->ifa_dstaddr != NULL &&
1804 sa_equal(addr, ifa->ifa_dstaddr)) {
1806 IF_ADDR_RUNLOCK(ifp);
1810 IF_ADDR_RUNLOCK(ifp);
1814 IFNET_RUNLOCK_NOSLEEP();
1819 * Find an interface on a specific network. If many, choice
1820 * is most specific found.
1823 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp, int fibnum)
1827 struct ifaddr *ifa_maybe = NULL;
1828 u_int af = addr->sa_family;
1829 char *addr_data = addr->sa_data, *cplim;
1832 * AF_LINK addresses can be looked up directly by their index number,
1833 * so do that if we can.
1835 if (af == AF_LINK) {
1836 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1837 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1838 return (ifaddr_byindex(sdl->sdl_index));
1842 * Scan though each interface, looking for ones that have addresses
1843 * in this address family and the requested fib. Maintain a reference
1844 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1845 * kept it stable when we move onto the next interface.
1847 IFNET_RLOCK_NOSLEEP();
1848 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1849 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1852 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1853 char *cp, *cp2, *cp3;
1855 if (ifa->ifa_addr->sa_family != af)
1857 if (af == AF_INET &&
1858 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1860 * This is a bit broken as it doesn't
1861 * take into account that the remote end may
1862 * be a single node in the network we are
1864 * The trouble is that we don't know the
1865 * netmask for the remote end.
1867 if (ifa->ifa_dstaddr != NULL &&
1868 sa_equal(addr, ifa->ifa_dstaddr)) {
1870 IF_ADDR_RUNLOCK(ifp);
1875 * Scan all the bits in the ifa's address.
1876 * If a bit dissagrees with what we are
1877 * looking for, mask it with the netmask
1878 * to see if it really matters.
1879 * (A byte at a time)
1881 if (ifa->ifa_netmask == 0)
1884 cp2 = ifa->ifa_addr->sa_data;
1885 cp3 = ifa->ifa_netmask->sa_data;
1886 cplim = ifa->ifa_netmask->sa_len
1887 + (char *)ifa->ifa_netmask;
1889 if ((*cp++ ^ *cp2++) & *cp3++)
1890 goto next; /* next address! */
1892 * If the netmask of what we just found
1893 * is more specific than what we had before
1894 * (if we had one), or if the virtual status
1895 * of new prefix is better than of the old one,
1896 * then remember the new one before continuing
1897 * to search for an even better one.
1899 if (ifa_maybe == NULL ||
1900 ifa_preferred(ifa_maybe, ifa) ||
1901 rn_refines((caddr_t)ifa->ifa_netmask,
1902 (caddr_t)ifa_maybe->ifa_netmask)) {
1903 if (ifa_maybe != NULL)
1904 ifa_free(ifa_maybe);
1910 IF_ADDR_RUNLOCK(ifp);
1915 IFNET_RUNLOCK_NOSLEEP();
1916 if (ifa_maybe != NULL)
1917 ifa_free(ifa_maybe);
1922 * Find an interface address specific to an interface best matching
1926 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1929 char *cp, *cp2, *cp3;
1931 struct ifaddr *ifa_maybe = NULL;
1932 u_int af = addr->sa_family;
1937 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1938 if (ifa->ifa_addr->sa_family != af)
1940 if (ifa_maybe == NULL)
1942 if (ifa->ifa_netmask == 0) {
1943 if (sa_equal(addr, ifa->ifa_addr) ||
1944 (ifa->ifa_dstaddr &&
1945 sa_equal(addr, ifa->ifa_dstaddr)))
1949 if (ifp->if_flags & IFF_POINTOPOINT) {
1950 if (sa_equal(addr, ifa->ifa_dstaddr))
1954 cp2 = ifa->ifa_addr->sa_data;
1955 cp3 = ifa->ifa_netmask->sa_data;
1956 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1957 for (; cp3 < cplim; cp3++)
1958 if ((*cp++ ^ *cp2++) & *cp3)
1968 IF_ADDR_RUNLOCK(ifp);
1973 * See whether new ifa is better than current one:
1974 * 1) A non-virtual one is preferred over virtual.
1975 * 2) A virtual in master state preferred over any other state.
1977 * Used in several address selecting functions.
1980 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
1983 return (cur->ifa_carp && (!next->ifa_carp ||
1984 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
1987 #include <net/if_llatbl.h>
1990 * Default action when installing a route with a Link Level gateway.
1991 * Lookup an appropriate real ifa to point to.
1992 * This should be moved to /sys/net/link.c eventually.
1995 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
1997 struct ifaddr *ifa, *oifa;
1998 struct sockaddr *dst;
2001 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
2002 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
2004 ifa = ifaof_ifpforaddr(dst, ifp);
2009 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2010 ifa->ifa_rtrequest(cmd, rt, info);
2014 struct sockaddr_dl *
2015 link_alloc_sdl(size_t size, int flags)
2018 return (malloc(size, M_TEMP, flags));
2022 link_free_sdl(struct sockaddr *sa)
2028 * Fills in given sdl with interface basic info.
2029 * Returns pointer to filled sdl.
2031 struct sockaddr_dl *
2032 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2034 struct sockaddr_dl *sdl;
2036 sdl = (struct sockaddr_dl *)paddr;
2037 memset(sdl, 0, sizeof(struct sockaddr_dl));
2038 sdl->sdl_len = sizeof(struct sockaddr_dl);
2039 sdl->sdl_family = AF_LINK;
2040 sdl->sdl_index = ifp->if_index;
2041 sdl->sdl_type = iftype;
2047 * Mark an interface down and notify protocols of
2051 if_unroute(struct ifnet *ifp, int flag, int fam)
2055 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2057 ifp->if_flags &= ~flag;
2058 getmicrotime(&ifp->if_lastchange);
2059 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2060 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2061 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2062 ifp->if_qflush(ifp);
2065 (*carp_linkstate_p)(ifp);
2070 * Mark an interface up and notify protocols of
2074 if_route(struct ifnet *ifp, int flag, int fam)
2078 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2080 ifp->if_flags |= flag;
2081 getmicrotime(&ifp->if_lastchange);
2082 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2083 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2084 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2086 (*carp_linkstate_p)(ifp);
2093 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2094 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2095 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2096 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2097 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2098 int (*vlan_setcookie_p)(struct ifnet *, void *);
2099 void *(*vlan_cookie_p)(struct ifnet *);
2102 * Handle a change in the interface link state. To avoid LORs
2103 * between driver lock and upper layer locks, as well as possible
2104 * recursions, we post event to taskqueue, and all job
2105 * is done in static do_link_state_change().
2108 if_link_state_change(struct ifnet *ifp, int link_state)
2110 /* Return if state hasn't changed. */
2111 if (ifp->if_link_state == link_state)
2114 ifp->if_link_state = link_state;
2116 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2120 do_link_state_change(void *arg, int pending)
2122 struct ifnet *ifp = (struct ifnet *)arg;
2123 int link_state = ifp->if_link_state;
2124 CURVNET_SET(ifp->if_vnet);
2126 /* Notify that the link state has changed. */
2128 if (ifp->if_vlantrunk != NULL)
2129 (*vlan_link_state_p)(ifp);
2131 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2132 ifp->if_l2com != NULL)
2133 (*ng_ether_link_state_p)(ifp, link_state);
2135 (*carp_linkstate_p)(ifp);
2137 (*bridge_linkstate_p)(ifp);
2139 (*lagg_linkstate_p)(ifp, link_state);
2141 if (IS_DEFAULT_VNET(curvnet))
2142 devctl_notify("IFNET", ifp->if_xname,
2143 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2146 if_printf(ifp, "%d link states coalesced\n", pending);
2147 if (log_link_state_change)
2148 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2149 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2150 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2155 * Mark an interface down and notify protocols of
2159 if_down(struct ifnet *ifp)
2162 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2166 * Mark an interface up and notify protocols of
2170 if_up(struct ifnet *ifp)
2173 if_route(ifp, IFF_UP, AF_UNSPEC);
2177 * Flush an interface queue.
2180 if_qflush(struct ifnet *ifp)
2188 if (ALTQ_IS_ENABLED(ifq))
2192 while ((m = n) != 0) {
2203 * Map interface name to interface structure pointer, with or without
2204 * returning a reference.
2207 ifunit_ref(const char *name)
2211 IFNET_RLOCK_NOSLEEP();
2212 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2213 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2214 !(ifp->if_flags & IFF_DYING))
2219 IFNET_RUNLOCK_NOSLEEP();
2224 ifunit(const char *name)
2228 IFNET_RLOCK_NOSLEEP();
2229 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2230 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2233 IFNET_RUNLOCK_NOSLEEP();
2238 * Hardware specific interface ioctls.
2241 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2245 int new_flags, temp_flags;
2246 size_t namelen, onamelen;
2248 char *descrbuf, *odescrbuf;
2249 char new_name[IFNAMSIZ];
2251 struct sockaddr_dl *sdl;
2253 ifr = (struct ifreq *)data;
2256 ifr->ifr_index = ifp->if_index;
2260 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2261 ifr->ifr_flags = temp_flags & 0xffff;
2262 ifr->ifr_flagshigh = temp_flags >> 16;
2266 ifr->ifr_reqcap = ifp->if_capabilities;
2267 ifr->ifr_curcap = ifp->if_capenable;
2272 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2277 ifr->ifr_metric = ifp->if_metric;
2281 ifr->ifr_mtu = ifp->if_mtu;
2285 /* XXXGL: did this ever worked? */
2291 sx_slock(&ifdescr_sx);
2292 if (ifp->if_description == NULL)
2295 /* space for terminating nul */
2296 descrlen = strlen(ifp->if_description) + 1;
2297 if (ifr->ifr_buffer.length < descrlen)
2298 ifr->ifr_buffer.buffer = NULL;
2300 error = copyout(ifp->if_description,
2301 ifr->ifr_buffer.buffer, descrlen);
2302 ifr->ifr_buffer.length = descrlen;
2304 sx_sunlock(&ifdescr_sx);
2308 error = priv_check(td, PRIV_NET_SETIFDESCR);
2313 * Copy only (length-1) bytes to make sure that
2314 * if_description is always nul terminated. The
2315 * length parameter is supposed to count the
2316 * terminating nul in.
2318 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2319 return (ENAMETOOLONG);
2320 else if (ifr->ifr_buffer.length == 0)
2323 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2325 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2326 ifr->ifr_buffer.length - 1);
2328 free(descrbuf, M_IFDESCR);
2333 sx_xlock(&ifdescr_sx);
2334 odescrbuf = ifp->if_description;
2335 ifp->if_description = descrbuf;
2336 sx_xunlock(&ifdescr_sx);
2338 getmicrotime(&ifp->if_lastchange);
2339 free(odescrbuf, M_IFDESCR);
2343 ifr->ifr_fib = ifp->if_fib;
2347 error = priv_check(td, PRIV_NET_SETIFFIB);
2350 if (ifr->ifr_fib >= rt_numfibs)
2353 ifp->if_fib = ifr->ifr_fib;
2357 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2361 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2362 * check, so we don't need special handling here yet.
2364 new_flags = (ifr->ifr_flags & 0xffff) |
2365 (ifr->ifr_flagshigh << 16);
2366 if (ifp->if_flags & IFF_UP &&
2367 (new_flags & IFF_UP) == 0) {
2369 } else if (new_flags & IFF_UP &&
2370 (ifp->if_flags & IFF_UP) == 0) {
2373 /* See if permanently promiscuous mode bit is about to flip */
2374 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2375 if (new_flags & IFF_PPROMISC)
2376 ifp->if_flags |= IFF_PROMISC;
2377 else if (ifp->if_pcount == 0)
2378 ifp->if_flags &= ~IFF_PROMISC;
2379 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2381 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
2383 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2384 (new_flags &~ IFF_CANTCHANGE);
2385 if (ifp->if_ioctl) {
2386 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2388 getmicrotime(&ifp->if_lastchange);
2392 error = priv_check(td, PRIV_NET_SETIFCAP);
2395 if (ifp->if_ioctl == NULL)
2396 return (EOPNOTSUPP);
2397 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2399 error = (*ifp->if_ioctl)(ifp, cmd, data);
2401 getmicrotime(&ifp->if_lastchange);
2406 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2411 error = priv_check(td, PRIV_NET_SETIFNAME);
2414 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2417 if (new_name[0] == '\0')
2419 if (ifunit(new_name) != NULL)
2423 * XXX: Locking. Nothing else seems to lock if_flags,
2424 * and there are numerous other races with the
2425 * ifunit() checks not being atomic with namespace
2426 * changes (renames, vmoves, if_attach, etc).
2428 ifp->if_flags |= IFF_RENAMING;
2430 /* Announce the departure of the interface. */
2431 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2432 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2434 log(LOG_INFO, "%s: changing name to '%s'\n",
2435 ifp->if_xname, new_name);
2438 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2440 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2441 namelen = strlen(new_name);
2442 onamelen = sdl->sdl_nlen;
2444 * Move the address if needed. This is safe because we
2445 * allocate space for a name of length IFNAMSIZ when we
2446 * create this in if_attach().
2448 if (namelen != onamelen) {
2449 bcopy(sdl->sdl_data + onamelen,
2450 sdl->sdl_data + namelen, sdl->sdl_alen);
2452 bcopy(new_name, sdl->sdl_data, namelen);
2453 sdl->sdl_nlen = namelen;
2454 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2455 bzero(sdl->sdl_data, onamelen);
2456 while (namelen != 0)
2457 sdl->sdl_data[--namelen] = 0xff;
2458 IF_ADDR_WUNLOCK(ifp);
2460 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2461 /* Announce the return of the interface. */
2462 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2464 ifp->if_flags &= ~IFF_RENAMING;
2469 error = priv_check(td, PRIV_NET_SETIFVNET);
2472 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2477 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2480 ifp->if_metric = ifr->ifr_metric;
2481 getmicrotime(&ifp->if_lastchange);
2485 error = priv_check(td, PRIV_NET_SETIFPHYS);
2488 if (ifp->if_ioctl == NULL)
2489 return (EOPNOTSUPP);
2490 error = (*ifp->if_ioctl)(ifp, cmd, data);
2492 getmicrotime(&ifp->if_lastchange);
2497 u_long oldmtu = ifp->if_mtu;
2499 error = priv_check(td, PRIV_NET_SETIFMTU);
2502 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2504 if (ifp->if_ioctl == NULL)
2505 return (EOPNOTSUPP);
2506 error = (*ifp->if_ioctl)(ifp, cmd, data);
2508 getmicrotime(&ifp->if_lastchange);
2512 * If the link MTU changed, do network layer specific procedure.
2514 if (ifp->if_mtu != oldmtu) {
2525 if (cmd == SIOCADDMULTI)
2526 error = priv_check(td, PRIV_NET_ADDMULTI);
2528 error = priv_check(td, PRIV_NET_DELMULTI);
2532 /* Don't allow group membership on non-multicast interfaces. */
2533 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2534 return (EOPNOTSUPP);
2536 /* Don't let users screw up protocols' entries. */
2537 if (ifr->ifr_addr.sa_family != AF_LINK)
2540 if (cmd == SIOCADDMULTI) {
2541 struct ifmultiaddr *ifma;
2544 * Userland is only permitted to join groups once
2545 * via the if_addmulti() KPI, because it cannot hold
2546 * struct ifmultiaddr * between calls. It may also
2547 * lose a race while we check if the membership
2551 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2552 IF_ADDR_RUNLOCK(ifp);
2556 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2558 error = if_delmulti(ifp, &ifr->ifr_addr);
2561 getmicrotime(&ifp->if_lastchange);
2564 case SIOCSIFPHYADDR:
2565 case SIOCDIFPHYADDR:
2567 case SIOCSIFPHYADDR_IN6:
2570 case SIOCSIFGENERIC:
2571 error = priv_check(td, PRIV_NET_HWIOCTL);
2574 if (ifp->if_ioctl == NULL)
2575 return (EOPNOTSUPP);
2576 error = (*ifp->if_ioctl)(ifp, cmd, data);
2578 getmicrotime(&ifp->if_lastchange);
2582 case SIOCGIFPSRCADDR:
2583 case SIOCGIFPDSTADDR:
2585 case SIOCGIFGENERIC:
2586 if (ifp->if_ioctl == NULL)
2587 return (EOPNOTSUPP);
2588 error = (*ifp->if_ioctl)(ifp, cmd, data);
2592 error = priv_check(td, PRIV_NET_SETLLADDR);
2595 error = if_setlladdr(ifp,
2596 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2597 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2602 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2604 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2607 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2613 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2619 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2621 error = priv_check(td, PRIV_NET_DELIFGROUP);
2624 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2636 #ifdef COMPAT_FREEBSD32
2644 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2651 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2658 CURVNET_SET(so->so_vnet);
2661 error = ifconf(cmd, data);
2665 #ifdef COMPAT_FREEBSD32
2668 struct ifconf32 *ifc32;
2671 ifc32 = (struct ifconf32 *)data;
2672 ifc.ifc_len = ifc32->ifc_len;
2673 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2675 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2678 ifc32->ifc_len = ifc.ifc_len;
2683 ifr = (struct ifreq *)data;
2688 error = priv_check(td, PRIV_NET_SETIFVNET);
2690 error = if_vmove_reclaim(td, ifr->ifr_name,
2697 error = priv_check(td, PRIV_NET_IFCREATE);
2699 error = if_clone_create(ifr->ifr_name,
2700 sizeof(ifr->ifr_name),
2701 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2705 error = priv_check(td, PRIV_NET_IFDESTROY);
2707 error = if_clone_destroy(ifr->ifr_name);
2711 case SIOCIFGCLONERS:
2712 error = if_clone_list((struct if_clonereq *)data);
2716 error = if_getgroupmembers((struct ifgroupreq *)data);
2719 #if defined(INET) || defined(INET6)
2722 if (carp_ioctl_p == NULL)
2723 error = EPROTONOSUPPORT;
2725 error = (*carp_ioctl_p)(ifr, cmd, td);
2731 ifp = ifunit_ref(ifr->ifr_name);
2737 error = ifhwioctl(cmd, ifp, data, td);
2738 if (error != ENOIOCTL) {
2744 oif_flags = ifp->if_flags;
2745 if (so->so_proto == NULL) {
2748 return (EOPNOTSUPP);
2752 * Pass the request on to the socket control method, and if the
2753 * latter returns EOPNOTSUPP, directly to the interface.
2755 * Make an exception for the legacy SIOCSIF* requests. Drivers
2756 * trust SIOCSIFADDR et al to come from an already privileged
2757 * layer, and do not perform any credentials checks or input
2760 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2762 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2763 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2764 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2765 error = (*ifp->if_ioctl)(ifp, cmd, data);
2767 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2769 if (ifp->if_flags & IFF_UP)
2779 * The code common to handling reference counted flags,
2780 * e.g., in ifpromisc() and if_allmulti().
2781 * The "pflag" argument can specify a permanent mode flag to check,
2782 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2784 * Only to be used on stack-owned flags, not driver-owned flags.
2787 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2791 int oldflags, oldcount;
2793 /* Sanity checks to catch programming errors */
2794 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2795 ("%s: setting driver-owned flag %d", __func__, flag));
2798 KASSERT(*refcount >= 0,
2799 ("%s: increment negative refcount %d for flag %d",
2800 __func__, *refcount, flag));
2802 KASSERT(*refcount > 0,
2803 ("%s: decrement non-positive refcount %d for flag %d",
2804 __func__, *refcount, flag));
2806 /* In case this mode is permanent, just touch refcount */
2807 if (ifp->if_flags & pflag) {
2808 *refcount += onswitch ? 1 : -1;
2812 /* Save ifnet parameters for if_ioctl() may fail */
2813 oldcount = *refcount;
2814 oldflags = ifp->if_flags;
2817 * See if we aren't the only and touching refcount is enough.
2818 * Actually toggle interface flag if we are the first or last.
2823 ifp->if_flags |= flag;
2827 ifp->if_flags &= ~flag;
2830 /* Call down the driver since we've changed interface flags */
2831 if (ifp->if_ioctl == NULL) {
2835 ifr.ifr_flags = ifp->if_flags & 0xffff;
2836 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2837 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2840 /* Notify userland that interface flags have changed */
2845 /* Recover after driver error */
2846 *refcount = oldcount;
2847 ifp->if_flags = oldflags;
2852 * Set/clear promiscuous mode on interface ifp based on the truth value
2853 * of pswitch. The calls are reference counted so that only the first
2854 * "on" request actually has an effect, as does the final "off" request.
2855 * Results are undefined if the "off" and "on" requests are not matched.
2858 ifpromisc(struct ifnet *ifp, int pswitch)
2861 int oldflags = ifp->if_flags;
2863 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2864 &ifp->if_pcount, pswitch);
2865 /* If promiscuous mode status has changed, log a message */
2866 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
2867 log(LOG_INFO, "%s: promiscuous mode %s\n",
2869 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2874 * Return interface configuration
2875 * of system. List may be used
2876 * in later ioctl's (above) to get
2877 * other information.
2881 ifconf(u_long cmd, caddr_t data)
2883 struct ifconf *ifc = (struct ifconf *)data;
2888 int error, full = 0, valid_len, max_len;
2890 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2891 max_len = MAXPHYS - 1;
2893 /* Prevent hostile input from being able to crash the system */
2894 if (ifc->ifc_len <= 0)
2898 if (ifc->ifc_len <= max_len) {
2899 max_len = ifc->ifc_len;
2902 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2907 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2911 * Zero the ifr_name buffer to make sure we don't
2912 * disclose the contents of the stack.
2914 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2916 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2917 >= sizeof(ifr.ifr_name)) {
2920 return (ENAMETOOLONG);
2925 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2926 struct sockaddr *sa = ifa->ifa_addr;
2928 if (prison_if(curthread->td_ucred, sa) != 0)
2931 if (sa->sa_len <= sizeof(*sa)) {
2933 sbuf_bcat(sb, &ifr, sizeof(ifr));
2934 max_len += sizeof(ifr);
2937 offsetof(struct ifreq, ifr_addr));
2938 max_len += offsetof(struct ifreq, ifr_addr);
2939 sbuf_bcat(sb, sa, sa->sa_len);
2940 max_len += sa->sa_len;
2943 if (sbuf_error(sb) == 0)
2944 valid_len = sbuf_len(sb);
2946 IF_ADDR_RUNLOCK(ifp);
2948 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
2949 sbuf_bcat(sb, &ifr, sizeof(ifr));
2950 max_len += sizeof(ifr);
2952 if (sbuf_error(sb) == 0)
2953 valid_len = sbuf_len(sb);
2959 * If we didn't allocate enough space (uncommon), try again. If
2960 * we have already allocated as much space as we are allowed,
2961 * return what we've got.
2963 if (valid_len != max_len && !full) {
2968 ifc->ifc_len = valid_len;
2970 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
2976 * Just like ifpromisc(), but for all-multicast-reception mode.
2979 if_allmulti(struct ifnet *ifp, int onswitch)
2982 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
2985 struct ifmultiaddr *
2986 if_findmulti(struct ifnet *ifp, struct sockaddr *sa)
2988 struct ifmultiaddr *ifma;
2990 IF_ADDR_LOCK_ASSERT(ifp);
2992 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2993 if (sa->sa_family == AF_LINK) {
2994 if (sa_dl_equal(ifma->ifma_addr, sa))
2997 if (sa_equal(ifma->ifma_addr, sa))
3006 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3007 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3008 * the ifnet multicast address list here, so the caller must do that and
3009 * other setup work (such as notifying the device driver). The reference
3010 * count is initialized to 1.
3012 static struct ifmultiaddr *
3013 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3016 struct ifmultiaddr *ifma;
3017 struct sockaddr *dupsa;
3019 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3024 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3025 if (dupsa == NULL) {
3026 free(ifma, M_IFMADDR);
3029 bcopy(sa, dupsa, sa->sa_len);
3030 ifma->ifma_addr = dupsa;
3032 ifma->ifma_ifp = ifp;
3033 ifma->ifma_refcount = 1;
3034 ifma->ifma_protospec = NULL;
3037 ifma->ifma_lladdr = NULL;
3041 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3042 if (dupsa == NULL) {
3043 free(ifma->ifma_addr, M_IFMADDR);
3044 free(ifma, M_IFMADDR);
3047 bcopy(llsa, dupsa, llsa->sa_len);
3048 ifma->ifma_lladdr = dupsa;
3054 * if_freemulti: free ifmultiaddr structure and possibly attached related
3055 * addresses. The caller is responsible for implementing reference
3056 * counting, notifying the driver, handling routing messages, and releasing
3057 * any dependent link layer state.
3060 if_freemulti(struct ifmultiaddr *ifma)
3063 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3064 ifma->ifma_refcount));
3066 if (ifma->ifma_lladdr != NULL)
3067 free(ifma->ifma_lladdr, M_IFMADDR);
3068 free(ifma->ifma_addr, M_IFMADDR);
3069 free(ifma, M_IFMADDR);
3073 * Register an additional multicast address with a network interface.
3075 * - If the address is already present, bump the reference count on the
3076 * address and return.
3077 * - If the address is not link-layer, look up a link layer address.
3078 * - Allocate address structures for one or both addresses, and attach to the
3079 * multicast address list on the interface. If automatically adding a link
3080 * layer address, the protocol address will own a reference to the link
3081 * layer address, to be freed when it is freed.
3082 * - Notify the network device driver of an addition to the multicast address
3085 * 'sa' points to caller-owned memory with the desired multicast address.
3087 * 'retifma' will be used to return a pointer to the resulting multicast
3088 * address reference, if desired.
3091 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3092 struct ifmultiaddr **retifma)
3094 struct ifmultiaddr *ifma, *ll_ifma;
3095 struct sockaddr *llsa;
3096 struct sockaddr_dl sdl;
3100 * If the address is already present, return a new reference to it;
3101 * otherwise, allocate storage and set up a new address.
3104 ifma = if_findmulti(ifp, sa);
3106 ifma->ifma_refcount++;
3107 if (retifma != NULL)
3109 IF_ADDR_WUNLOCK(ifp);
3114 * The address isn't already present; resolve the protocol address
3115 * into a link layer address, and then look that up, bump its
3116 * refcount or allocate an ifma for that also.
3117 * Most link layer resolving functions returns address data which
3118 * fits inside default sockaddr_dl structure. However callback
3119 * can allocate another sockaddr structure, in that case we need to
3124 if (ifp->if_resolvemulti != NULL) {
3125 /* Provide called function with buffer size information */
3126 sdl.sdl_len = sizeof(sdl);
3127 llsa = (struct sockaddr *)&sdl;
3128 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3134 * Allocate the new address. Don't hook it up yet, as we may also
3135 * need to allocate a link layer multicast address.
3137 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3144 * If a link layer address is found, we'll need to see if it's
3145 * already present in the address list, or allocate is as well.
3146 * When this block finishes, the link layer address will be on the
3150 ll_ifma = if_findmulti(ifp, llsa);
3151 if (ll_ifma == NULL) {
3152 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3153 if (ll_ifma == NULL) {
3154 --ifma->ifma_refcount;
3159 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3162 ll_ifma->ifma_refcount++;
3163 ifma->ifma_llifma = ll_ifma;
3167 * We now have a new multicast address, ifma, and possibly a new or
3168 * referenced link layer address. Add the primary address to the
3169 * ifnet address list.
3171 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3173 if (retifma != NULL)
3177 * Must generate the message while holding the lock so that 'ifma'
3178 * pointer is still valid.
3180 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3181 IF_ADDR_WUNLOCK(ifp);
3184 * We are certain we have added something, so call down to the
3185 * interface to let them know about it.
3187 if (ifp->if_ioctl != NULL) {
3188 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3191 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3192 link_free_sdl(llsa);
3197 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3198 link_free_sdl(llsa);
3201 IF_ADDR_WUNLOCK(ifp);
3206 * Delete a multicast group membership by network-layer group address.
3208 * Returns ENOENT if the entry could not be found. If ifp no longer
3209 * exists, results are undefined. This entry point should only be used
3210 * from subsystems which do appropriate locking to hold ifp for the
3211 * duration of the call.
3212 * Network-layer protocol domains must use if_delmulti_ifma().
3215 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3217 struct ifmultiaddr *ifma;
3222 IFNET_RLOCK_NOSLEEP();
3223 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3228 IFNET_RUNLOCK_NOSLEEP();
3230 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3237 ifma = if_findmulti(ifp, sa);
3239 lastref = if_delmulti_locked(ifp, ifma, 0);
3240 IF_ADDR_WUNLOCK(ifp);
3245 if (lastref && ifp->if_ioctl != NULL) {
3246 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3253 * Delete all multicast group membership for an interface.
3254 * Should be used to quickly flush all multicast filters.
3257 if_delallmulti(struct ifnet *ifp)
3259 struct ifmultiaddr *ifma;
3260 struct ifmultiaddr *next;
3263 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3264 if_delmulti_locked(ifp, ifma, 0);
3265 IF_ADDR_WUNLOCK(ifp);
3269 * Delete a multicast group membership by group membership pointer.
3270 * Network-layer protocol domains must use this routine.
3272 * It is safe to call this routine if the ifp disappeared.
3275 if_delmulti_ifma(struct ifmultiaddr *ifma)
3280 ifp = ifma->ifma_ifp;
3283 printf("%s: ifma_ifp seems to be detached\n", __func__);
3287 IFNET_RLOCK_NOSLEEP();
3288 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3292 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3295 IFNET_RUNLOCK_NOSLEEP();
3299 * If and only if the ifnet instance exists: Acquire the address lock.
3304 lastref = if_delmulti_locked(ifp, ifma, 0);
3308 * If and only if the ifnet instance exists:
3309 * Release the address lock.
3310 * If the group was left: update the hardware hash filter.
3312 IF_ADDR_WUNLOCK(ifp);
3313 if (lastref && ifp->if_ioctl != NULL) {
3314 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3320 * Perform deletion of network-layer and/or link-layer multicast address.
3322 * Return 0 if the reference count was decremented.
3323 * Return 1 if the final reference was released, indicating that the
3324 * hardware hash filter should be reprogrammed.
3327 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3329 struct ifmultiaddr *ll_ifma;
3331 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3332 KASSERT(ifma->ifma_ifp == ifp,
3333 ("%s: inconsistent ifp %p", __func__, ifp));
3334 IF_ADDR_WLOCK_ASSERT(ifp);
3337 ifp = ifma->ifma_ifp;
3340 * If the ifnet is detaching, null out references to ifnet,
3341 * so that upper protocol layers will notice, and not attempt
3342 * to obtain locks for an ifnet which no longer exists. The
3343 * routing socket announcement must happen before the ifnet
3344 * instance is detached from the system.
3348 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3351 * ifp may already be nulled out if we are being reentered
3352 * to delete the ll_ifma.
3355 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3356 ifma->ifma_ifp = NULL;
3360 if (--ifma->ifma_refcount > 0)
3364 * If this ifma is a network-layer ifma, a link-layer ifma may
3365 * have been associated with it. Release it first if so.
3367 ll_ifma = ifma->ifma_llifma;
3368 if (ll_ifma != NULL) {
3369 KASSERT(ifma->ifma_lladdr != NULL,
3370 ("%s: llifma w/o lladdr", __func__));
3372 ll_ifma->ifma_ifp = NULL; /* XXX */
3373 if (--ll_ifma->ifma_refcount == 0) {
3375 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3378 if_freemulti(ll_ifma);
3383 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3388 * The last reference to this instance of struct ifmultiaddr
3389 * was released; the hardware should be notified of this change.
3395 * Set the link layer address on an interface.
3397 * At this time we only support certain types of interfaces,
3398 * and we don't allow the length of the address to change.
3401 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3403 struct sockaddr_dl *sdl;
3410 IF_ADDR_RUNLOCK(ifp);
3414 IF_ADDR_RUNLOCK(ifp);
3415 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3420 if (len != sdl->sdl_alen) { /* don't allow length to change */
3424 switch (ifp->if_type) {
3432 case IFT_IEEE8023ADLAG:
3434 bcopy(lladdr, LLADDR(sdl), len);
3443 * If the interface is already up, we need
3444 * to re-init it in order to reprogram its
3447 if ((ifp->if_flags & IFF_UP) != 0) {
3448 if (ifp->if_ioctl) {
3449 ifp->if_flags &= ~IFF_UP;
3450 ifr.ifr_flags = ifp->if_flags & 0xffff;
3451 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3452 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3453 ifp->if_flags |= IFF_UP;
3454 ifr.ifr_flags = ifp->if_flags & 0xffff;
3455 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3456 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3460 * Also send gratuitous ARPs to notify other nodes about
3461 * the address change.
3463 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3464 if (ifa->ifa_addr->sa_family == AF_INET)
3465 arp_ifinit(ifp, ifa);
3473 * The name argument must be a pointer to storage which will last as
3474 * long as the interface does. For physical devices, the result of
3475 * device_get_name(dev) is a good choice and for pseudo-devices a
3476 * static string works well.
3479 if_initname(struct ifnet *ifp, const char *name, int unit)
3481 ifp->if_dname = name;
3482 ifp->if_dunit = unit;
3483 if (unit != IF_DUNIT_NONE)
3484 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3486 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3490 if_printf(struct ifnet *ifp, const char * fmt, ...)
3495 retval = printf("%s: ", ifp->if_xname);
3497 retval += vprintf(fmt, ap);
3503 if_start(struct ifnet *ifp)
3506 (*(ifp)->if_start)(ifp);
3510 * Backwards compatibility interface for drivers
3511 * that have not implemented it
3514 if_transmit(struct ifnet *ifp, struct mbuf *m)
3518 IFQ_HANDOFF(ifp, m, error);
3523 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3530 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3535 if (_IF_QFULL(ifq)) {
3537 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3542 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3543 if (m->m_flags & (M_BCAST|M_MCAST))
3544 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3545 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3547 _IF_ENQUEUE(ifq, m);
3549 if (ifp != NULL && !active)
3550 (*(ifp)->if_start)(ifp);
3555 if_register_com_alloc(u_char type,
3556 if_com_alloc_t *a, if_com_free_t *f)
3559 KASSERT(if_com_alloc[type] == NULL,
3560 ("if_register_com_alloc: %d already registered", type));
3561 KASSERT(if_com_free[type] == NULL,
3562 ("if_register_com_alloc: %d free already registered", type));
3564 if_com_alloc[type] = a;
3565 if_com_free[type] = f;
3569 if_deregister_com_alloc(u_char type)
3572 KASSERT(if_com_alloc[type] != NULL,
3573 ("if_deregister_com_alloc: %d not registered", type));
3574 KASSERT(if_com_free[type] != NULL,
3575 ("if_deregister_com_alloc: %d free not registered", type));
3576 if_com_alloc[type] = NULL;
3577 if_com_free[type] = NULL;
3580 /* API for driver access to network stack owned ifnet.*/
3582 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3586 oldbrate = ifp->if_baudrate;
3587 ifp->if_baudrate = baudrate;
3592 if_getbaudrate(if_t ifp)
3595 return (((struct ifnet *)ifp)->if_baudrate);
3599 if_setcapabilities(if_t ifp, int capabilities)
3601 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3606 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3608 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3609 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3615 if_getcapabilities(if_t ifp)
3617 return ((struct ifnet *)ifp)->if_capabilities;
3621 if_setcapenable(if_t ifp, int capabilities)
3623 ((struct ifnet *)ifp)->if_capenable = capabilities;
3628 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3631 ((struct ifnet *)ifp)->if_capenable |= setcap;
3633 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3639 if_getdname(if_t ifp)
3641 return ((struct ifnet *)ifp)->if_dname;
3645 if_togglecapenable(if_t ifp, int togglecap)
3647 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3652 if_getcapenable(if_t ifp)
3654 return ((struct ifnet *)ifp)->if_capenable;
3658 * This is largely undesirable because it ties ifnet to a device, but does
3659 * provide flexiblity for an embedded product vendor. Should be used with
3660 * the understanding that it violates the interface boundaries, and should be
3661 * a last resort only.
3664 if_setdev(if_t ifp, void *dev)
3670 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3672 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3673 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3679 if_getdrvflags(if_t ifp)
3681 return ((struct ifnet *)ifp)->if_drv_flags;
3685 if_setdrvflags(if_t ifp, int flags)
3687 ((struct ifnet *)ifp)->if_drv_flags = flags;
3693 if_setflags(if_t ifp, int flags)
3695 ((struct ifnet *)ifp)->if_flags = flags;
3700 if_setflagbits(if_t ifp, int set, int clear)
3702 ((struct ifnet *)ifp)->if_flags |= set;
3703 ((struct ifnet *)ifp)->if_flags &= ~clear;
3709 if_getflags(if_t ifp)
3711 return ((struct ifnet *)ifp)->if_flags;
3715 if_clearhwassist(if_t ifp)
3717 ((struct ifnet *)ifp)->if_hwassist = 0;
3722 if_sethwassistbits(if_t ifp, int toset, int toclear)
3724 ((struct ifnet *)ifp)->if_hwassist |= toset;
3725 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3731 if_sethwassist(if_t ifp, int hwassist_bit)
3733 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3738 if_gethwassist(if_t ifp)
3740 return ((struct ifnet *)ifp)->if_hwassist;
3744 if_setmtu(if_t ifp, int mtu)
3746 ((struct ifnet *)ifp)->if_mtu = mtu;
3753 return ((struct ifnet *)ifp)->if_mtu;
3757 if_getmtu_family(if_t ifp, int family)
3761 for (dp = domains; dp; dp = dp->dom_next) {
3762 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3763 return (dp->dom_ifmtu((struct ifnet *)ifp));
3766 return (((struct ifnet *)ifp)->if_mtu);
3770 if_setsoftc(if_t ifp, void *softc)
3772 ((struct ifnet *)ifp)->if_softc = softc;
3777 if_getsoftc(if_t ifp)
3779 return ((struct ifnet *)ifp)->if_softc;
3783 if_setrcvif(struct mbuf *m, if_t ifp)
3785 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3789 if_setvtag(struct mbuf *m, uint16_t tag)
3791 m->m_pkthdr.ether_vtag = tag;
3795 if_getvtag(struct mbuf *m)
3798 return (m->m_pkthdr.ether_vtag);
3802 if_sendq_empty(if_t ifp)
3804 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3808 if_getifaddr(if_t ifp)
3810 return ((struct ifnet *)ifp)->if_addr;
3814 if_getamcount(if_t ifp)
3816 return ((struct ifnet *)ifp)->if_amcount;
3821 if_setsendqready(if_t ifp)
3823 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3828 if_setsendqlen(if_t ifp, int tx_desc_count)
3830 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3831 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3837 if_vlantrunkinuse(if_t ifp)
3839 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
3843 if_input(if_t ifp, struct mbuf* sendmp)
3845 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
3851 #ifndef ETH_ADDR_LEN
3852 #define ETH_ADDR_LEN 6
3856 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
3858 struct ifmultiaddr *ifma;
3859 uint8_t *lmta = (uint8_t *)mta;
3862 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3863 if (ifma->ifma_addr->sa_family != AF_LINK)
3869 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
3870 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
3879 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
3883 if_maddr_rlock(ifp);
3884 error = if_setupmultiaddr(ifp, mta, cnt, max);
3885 if_maddr_runlock(ifp);
3890 if_multiaddr_count(if_t ifp, int max)
3892 struct ifmultiaddr *ifma;
3896 if_maddr_rlock(ifp);
3897 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3898 if (ifma->ifma_addr->sa_family != AF_LINK)
3904 if_maddr_runlock(ifp);
3909 if_dequeue(if_t ifp)
3912 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
3918 if_sendq_prepend(if_t ifp, struct mbuf *m)
3920 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
3925 if_setifheaderlen(if_t ifp, int len)
3927 ((struct ifnet *)ifp)->if_hdrlen = len;
3932 if_getlladdr(if_t ifp)
3934 return (IF_LLADDR((struct ifnet *)ifp));
3938 if_gethandle(u_char type)
3940 return (if_alloc(type));
3944 if_bpfmtap(if_t ifh, struct mbuf *m)
3946 struct ifnet *ifp = (struct ifnet *)ifh;
3952 if_etherbpfmtap(if_t ifh, struct mbuf *m)
3954 struct ifnet *ifp = (struct ifnet *)ifh;
3956 ETHER_BPF_MTAP(ifp, m);
3960 if_vlancap(if_t ifh)
3962 struct ifnet *ifp = (struct ifnet *)ifh;
3963 VLAN_CAPABILITIES(ifp);
3967 if_setinitfn(if_t ifp, void (*init_fn)(void *))
3969 ((struct ifnet *)ifp)->if_init = init_fn;
3973 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
3975 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
3979 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
3981 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
3985 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
3987 ((struct ifnet *)ifp)->if_transmit = start_fn;
3990 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
3992 ((struct ifnet *)ifp)->if_qflush = flush_fn;
3997 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4000 ifp->if_get_counter = fn;
4003 /* Revisit these - These are inline functions originally. */
4005 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4007 return drbr_inuse_drv(ifh, br);
4011 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4013 return drbr_dequeue(ifh, br);
4017 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4019 return drbr_needs_enqueue(ifh, br);
4023 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4025 return drbr_enqueue(ifh, br, m);