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/if_arp.h>
68 #include <net/if_clone.h>
69 #include <net/if_dl.h>
70 #include <net/if_types.h>
71 #include <net/if_var.h>
72 #include <net/radix.h>
73 #include <net/route.h>
76 #if defined(INET) || defined(INET6)
77 #include <net/ethernet.h>
78 #include <netinet/in.h>
79 #include <netinet/in_var.h>
80 #include <netinet/ip.h>
81 #include <netinet/ip_carp.h>
83 #include <netinet/if_ether.h>
86 #include <netinet6/in6_var.h>
87 #include <netinet6/in6_ifattach.h>
89 #endif /* INET || INET6 */
91 #include <security/mac/mac_framework.h>
93 #ifdef COMPAT_FREEBSD32
94 #include <sys/mount.h>
95 #include <compat/freebsd32/freebsd32.h>
98 struct ifindex_entry {
99 struct ifnet *ife_ifnet;
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 TUNABLE_INT("net.link.ifqmaxlen", &ifqmaxlen);
106 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
107 &ifqmaxlen, 0, "max send queue size");
109 /* Log link state change events */
110 static int log_link_state_change = 1;
112 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
113 &log_link_state_change, 0,
114 "log interface link state change events");
116 /* Interface description */
117 static unsigned int ifdescr_maxlen = 1024;
118 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
120 "administrative maximum length for interface description");
122 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
124 /* global sx for non-critical path ifdescr */
125 static struct sx ifdescr_sx;
126 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
128 void (*bridge_linkstate_p)(struct ifnet *ifp);
129 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
130 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
131 /* These are external hooks for CARP. */
132 void (*carp_linkstate_p)(struct ifnet *ifp);
133 void (*carp_demote_adj_p)(int, char *);
134 int (*carp_master_p)(struct ifaddr *);
135 #if defined(INET) || defined(INET6)
136 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
137 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
138 const struct sockaddr *sa);
139 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
140 int (*carp_attach_p)(struct ifaddr *, int);
141 void (*carp_detach_p)(struct ifaddr *);
144 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
147 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
148 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
149 const struct in6_addr *taddr);
152 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
155 * XXX: Style; these should be sorted alphabetically, and unprototyped
156 * static functions should be prototyped. Currently they are sorted by
159 static void if_attachdomain(void *);
160 static void if_attachdomain1(struct ifnet *);
161 static int ifconf(u_long, caddr_t);
162 static void if_freemulti(struct ifmultiaddr *);
163 static void if_init(void *);
164 static void if_grow(void);
165 static void if_input_default(struct ifnet *, struct mbuf *);
166 static void if_route(struct ifnet *, int flag, int fam);
167 static int if_setflag(struct ifnet *, int, int, int *, int);
168 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
169 static void if_unroute(struct ifnet *, int flag, int fam);
170 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
171 static int if_rtdel(struct radix_node *, void *);
172 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
173 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
174 static void do_link_state_change(void *, int);
175 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
176 static int if_getgroupmembers(struct ifgroupreq *);
177 static void if_delgroups(struct ifnet *);
178 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
179 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
183 * XXX: declare here to avoid to include many inet6 related files..
184 * should be more generalized?
186 extern void nd6_setmtu(struct ifnet *);
189 VNET_DEFINE(int, if_index);
190 int ifqmaxlen = IFQ_MAXLEN;
191 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
192 VNET_DEFINE(struct ifgrouphead, ifg_head);
194 static VNET_DEFINE(int, if_indexlim) = 8;
196 /* Table of ifnet by index. */
197 VNET_DEFINE(struct ifindex_entry *, ifindex_table);
199 #define V_if_indexlim VNET(if_indexlim)
200 #define V_ifindex_table VNET(ifindex_table)
203 * The global network interface list (V_ifnet) and related state (such as
204 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
205 * an rwlock. Either may be acquired shared to stablize the list, but both
206 * must be acquired writable to modify the list. This model allows us to
207 * both stablize the interface list during interrupt thread processing, but
208 * also to stablize it over long-running ioctls, without introducing priority
209 * inversions and deadlocks.
211 struct rwlock ifnet_rwlock;
212 struct sx ifnet_sxlock;
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].ife_ifnet == IFNET_HOLD)
236 return (V_ifindex_table[idx].ife_ifnet);
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
271 ifindex_alloc_locked(u_short *idxp)
275 IFNET_WLOCK_ASSERT();
279 * Try to find an empty slot below V_if_index. If we fail, take the
282 for (idx = 1; idx <= V_if_index; idx++) {
283 if (V_ifindex_table[idx].ife_ifnet == NULL)
287 /* Catch if_index overflow. */
290 if (idx >= V_if_indexlim) {
294 if (idx > V_if_index)
301 ifindex_free_locked(u_short idx)
304 IFNET_WLOCK_ASSERT();
306 V_ifindex_table[idx].ife_ifnet = NULL;
307 while (V_if_index > 0 &&
308 V_ifindex_table[V_if_index].ife_ifnet == NULL)
313 ifindex_free(u_short idx)
317 ifindex_free_locked(idx);
322 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
325 IFNET_WLOCK_ASSERT();
327 V_ifindex_table[idx].ife_ifnet = ifp;
331 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
335 ifnet_setbyindex_locked(idx, ifp);
340 ifaddr_byindex(u_short idx)
344 IFNET_RLOCK_NOSLEEP();
345 ifa = ifnet_byindex_locked(idx)->if_addr;
348 IFNET_RUNLOCK_NOSLEEP();
353 * Network interface utility routines.
355 * Routines with ifa_ifwith* names take sockaddr *'s as
360 vnet_if_init(const void *unused __unused)
363 TAILQ_INIT(&V_ifnet);
364 TAILQ_INIT(&V_ifg_head);
366 if_grow(); /* create initial table */
368 vnet_if_clone_init();
370 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
375 if_init(void *dummy __unused)
381 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL);
386 vnet_if_uninit(const void *unused __unused)
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));
394 free((caddr_t)V_ifindex_table, M_IFNET);
396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
397 vnet_if_uninit, NULL);
405 struct ifindex_entry *e;
407 IFNET_WLOCK_ASSERT();
408 oldlim = V_if_indexlim;
410 n = (oldlim << 1) * sizeof(*e);
411 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
413 if (V_if_indexlim != oldlim) {
417 if (V_ifindex_table != NULL) {
418 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
419 free((caddr_t)V_ifindex_table, M_IFNET);
426 * Allocate a struct ifnet and an index for an interface. A layer 2
427 * common structure will also be allocated if an allocation routine is
428 * registered for the passed type.
431 if_alloc(u_char type)
436 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
438 if (ifindex_alloc_locked(&idx) != 0) {
443 ifnet_setbyindex_locked(idx, IFNET_HOLD);
447 ifp->if_alloctype = type;
448 if (if_com_alloc[type] != NULL) {
449 ifp->if_l2com = if_com_alloc[type](type, ifp);
450 if (ifp->if_l2com == NULL) {
457 IF_ADDR_LOCK_INIT(ifp);
458 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
459 ifp->if_afdata_initialized = 0;
460 IF_AFDATA_LOCK_INIT(ifp);
461 TAILQ_INIT(&ifp->if_addrhead);
462 TAILQ_INIT(&ifp->if_multiaddrs);
463 TAILQ_INIT(&ifp->if_groups);
467 ifq_init(&ifp->if_snd, ifp);
469 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
470 ifnet_setbyindex(ifp->if_index, ifp);
475 * Do the actual work of freeing a struct ifnet, and layer 2 common
476 * structure. This call is made when the last reference to an
477 * interface is released.
480 if_free_internal(struct ifnet *ifp)
483 KASSERT((ifp->if_flags & IFF_DYING),
484 ("if_free_internal: interface not dying"));
486 if (if_com_free[ifp->if_alloctype] != NULL)
487 if_com_free[ifp->if_alloctype](ifp->if_l2com,
491 mac_ifnet_destroy(ifp);
493 if (ifp->if_description != NULL)
494 free(ifp->if_description, M_IFDESCR);
495 IF_AFDATA_DESTROY(ifp);
496 IF_ADDR_LOCK_DESTROY(ifp);
497 ifq_delete(&ifp->if_snd);
502 * Deregister an interface and free the associated storage.
505 if_free(struct ifnet *ifp)
508 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
510 CURVNET_SET_QUIET(ifp->if_vnet);
512 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
513 ("%s: freeing unallocated ifnet", ifp->if_xname));
515 ifindex_free_locked(ifp->if_index);
518 if (refcount_release(&ifp->if_refcount))
519 if_free_internal(ifp);
524 * Interfaces to keep an ifnet type-stable despite the possibility of the
525 * driver calling if_free(). If there are additional references, we defer
526 * freeing the underlying data structure.
529 if_ref(struct ifnet *ifp)
532 /* We don't assert the ifnet list lock here, but arguably should. */
533 refcount_acquire(&ifp->if_refcount);
537 if_rele(struct ifnet *ifp)
540 if (!refcount_release(&ifp->if_refcount))
542 if_free_internal(ifp);
546 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
549 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
551 if (ifq->ifq_maxlen == 0)
552 ifq->ifq_maxlen = ifqmaxlen;
555 ifq->altq_disc = NULL;
556 ifq->altq_flags &= ALTQF_CANTCHANGE;
557 ifq->altq_tbr = NULL;
562 ifq_delete(struct ifaltq *ifq)
564 mtx_destroy(&ifq->ifq_mtx);
568 * Perform generic interface initalization tasks and attach the interface
569 * to the list of "active" interfaces. If vmove flag is set on entry
570 * to if_attach_internal(), perform only a limited subset of initialization
571 * tasks, given that we are moving from one vnet to another an ifnet which
572 * has already been fully initialized.
574 * Note that if_detach_internal() removes group membership unconditionally
575 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
576 * Thus, when if_vmove() is applied to a cloned interface, group membership
577 * is lost while a cloned one always joins a group whose name is
578 * ifc->ifc_name. To recover this after if_detach_internal() and
579 * if_attach_internal(), the cloner should be specified to
580 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
581 * attempts to join a group whose name is ifc->ifc_name.
584 * - The decision to return void and thus require this function to
585 * succeed is questionable.
586 * - We should probably do more sanity checking. For instance we don't
587 * do anything to insure if_xname is unique or non-empty.
590 if_attach(struct ifnet *ifp)
593 if_attach_internal(ifp, 0, NULL);
597 * Compute the least common TSO limit.
600 if_hw_tsomax_common(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax)
603 * 1) If there is no limit currently, take the limit from
604 * the network adapter.
606 * 2) If the network adapter has a limit below the current
609 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
610 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
611 pmax->tsomaxbytes = ifp->if_hw_tsomax;
613 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
614 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
615 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
617 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
618 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
619 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
624 * Update TSO limit of a network adapter.
626 * Returns zero if no change. Else non-zero.
629 if_hw_tsomax_update(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax)
632 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
633 ifp->if_hw_tsomax = pmax->tsomaxbytes;
636 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
637 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
640 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
641 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
648 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
650 unsigned socksize, ifasize;
651 int namelen, masklen;
652 struct sockaddr_dl *sdl;
655 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
656 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
660 ifp->if_vnet = curvnet;
661 if (ifp->if_home_vnet == NULL)
662 ifp->if_home_vnet = curvnet;
665 if_addgroup(ifp, IFG_ALL);
667 /* Restore group membership for cloned interfaces. */
668 if (vmove && ifc != NULL)
669 if_clone_addgroup(ifp, ifc);
671 getmicrotime(&ifp->if_lastchange);
672 ifp->if_data.ifi_epoch = time_uptime;
673 ifp->if_data.ifi_datalen = sizeof(struct if_data);
675 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
676 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
677 ("transmit and qflush must both either be set or both be NULL"));
678 if (ifp->if_transmit == NULL) {
679 ifp->if_transmit = if_transmit;
680 ifp->if_qflush = if_qflush;
682 if (ifp->if_input == NULL)
683 ifp->if_input = if_input_default;
687 mac_ifnet_create(ifp);
691 * Create a Link Level name for this device.
693 namelen = strlen(ifp->if_xname);
695 * Always save enough space for any possiable name so we
696 * can do a rename in place later.
698 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
699 socksize = masklen + ifp->if_addrlen;
700 if (socksize < sizeof(*sdl))
701 socksize = sizeof(*sdl);
702 socksize = roundup2(socksize, sizeof(long));
703 ifasize = sizeof(*ifa) + 2 * socksize;
704 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
706 sdl = (struct sockaddr_dl *)(ifa + 1);
707 sdl->sdl_len = socksize;
708 sdl->sdl_family = AF_LINK;
709 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
710 sdl->sdl_nlen = namelen;
711 sdl->sdl_index = ifp->if_index;
712 sdl->sdl_type = ifp->if_type;
715 ifa->ifa_rtrequest = link_rtrequest;
716 ifa->ifa_addr = (struct sockaddr *)sdl;
717 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
718 ifa->ifa_netmask = (struct sockaddr *)sdl;
719 sdl->sdl_len = masklen;
721 sdl->sdl_data[--namelen] = 0xff;
722 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
723 /* Reliably crash if used uninitialized. */
724 ifp->if_broadcastaddr = NULL;
726 #if defined(INET) || defined(INET6)
727 /* Use defaults for TSO, if nothing is set */
728 if (ifp->if_hw_tsomax == 0 &&
729 ifp->if_hw_tsomaxsegcount == 0 &&
730 ifp->if_hw_tsomaxsegsize == 0) {
732 * The TSO defaults needs to be such that an
733 * NFS mbuf list of 35 mbufs totalling just
734 * below 64K works and that a chain of mbufs
735 * can be defragged into at most 32 segments:
737 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
738 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
739 ifp->if_hw_tsomaxsegcount = 35;
740 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
742 /* XXX some drivers set IFCAP_TSO after ethernet attach */
743 if (ifp->if_capabilities & IFCAP_TSO) {
744 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
746 ifp->if_hw_tsomaxsegcount,
747 ifp->if_hw_tsomaxsegsize);
755 * Update the interface index in the link layer address
758 for (ifa = ifp->if_addr; ifa != NULL;
759 ifa = TAILQ_NEXT(ifa, ifa_link)) {
760 if (ifa->ifa_addr->sa_family == AF_LINK) {
761 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
762 sdl->sdl_index = ifp->if_index;
769 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
771 curvnet->vnet_ifcnt++;
775 if (domain_init_status >= 2)
776 if_attachdomain1(ifp);
778 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
779 if (IS_DEFAULT_VNET(curvnet))
780 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
782 /* Announce the interface. */
783 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
787 if_attachdomain(void *dummy)
791 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
792 if_attachdomain1(ifp);
794 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
795 if_attachdomain, NULL);
798 if_attachdomain1(struct ifnet *ifp)
803 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
804 * cannot lock ifp->if_afdata initialization, entirely.
806 if (IF_AFDATA_TRYLOCK(ifp) == 0)
808 if (ifp->if_afdata_initialized >= domain_init_status) {
809 IF_AFDATA_UNLOCK(ifp);
810 log(LOG_WARNING, "%s called more than once on %s\n",
811 __func__, ifp->if_xname);
814 ifp->if_afdata_initialized = domain_init_status;
815 IF_AFDATA_UNLOCK(ifp);
817 /* address family dependent data region */
818 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
819 for (dp = domains; dp; dp = dp->dom_next) {
820 if (dp->dom_ifattach)
821 ifp->if_afdata[dp->dom_family] =
822 (*dp->dom_ifattach)(ifp);
827 * Remove any unicast or broadcast network addresses from an interface.
830 if_purgeaddrs(struct ifnet *ifp)
832 struct ifaddr *ifa, *next;
834 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
835 if (ifa->ifa_addr->sa_family == AF_LINK)
838 /* XXX: Ugly!! ad hoc just for INET */
839 if (ifa->ifa_addr->sa_family == AF_INET) {
840 struct ifaliasreq ifr;
842 bzero(&ifr, sizeof(ifr));
843 ifr.ifra_addr = *ifa->ifa_addr;
844 if (ifa->ifa_dstaddr)
845 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
846 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
852 if (ifa->ifa_addr->sa_family == AF_INET6) {
854 /* ifp_addrhead is already updated */
858 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
864 * Remove any multicast network addresses from an interface when an ifnet
868 if_purgemaddrs(struct ifnet *ifp)
870 struct ifmultiaddr *ifma;
871 struct ifmultiaddr *next;
874 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
875 if_delmulti_locked(ifp, ifma, 1);
876 IF_ADDR_WUNLOCK(ifp);
880 * Detach an interface, removing it from the list of "active" interfaces.
881 * If vmove flag is set on entry to if_detach_internal(), perform only a
882 * limited subset of cleanup tasks, given that we are moving an ifnet from
883 * one vnet to another, where it must be fully operational.
885 * XXXRW: There are some significant questions about event ordering, and
886 * how to prevent things from starting to use the interface during detach.
889 if_detach(struct ifnet *ifp)
892 CURVNET_SET_QUIET(ifp->if_vnet);
893 if_detach_internal(ifp, 0, NULL);
898 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
901 struct radix_node_head *rnh;
908 TAILQ_FOREACH(iter, &V_ifnet, if_link)
910 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
916 curvnet->vnet_ifcnt--;
921 * While we would want to panic here, we cannot
922 * guarantee that the interface is indeed still on
923 * the list given we don't hold locks all the way.
928 panic("%s: ifp=%p not on the ifnet tailq %p",
929 __func__, ifp, &V_ifnet);
931 return; /* XXX this should panic as well? */
935 /* Check if this is a cloned interface or not. */
936 if (vmove && ifcp != NULL)
937 *ifcp = if_clone_findifc(ifp);
940 * Remove/wait for pending events.
942 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
945 * Remove routes and flush queues.
949 if (ALTQ_IS_ENABLED(&ifp->if_snd))
950 altq_disable(&ifp->if_snd);
951 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
952 altq_detach(&ifp->if_snd);
963 * Remove all IPv6 kernel structs related to ifp. This should be done
964 * before removing routing entries below, since IPv6 interface direct
965 * routes are expected to be removed by the IPv6-specific kernel API.
966 * Otherwise, the kernel will detect some inconsistency and bark it.
974 * Prevent further calls into the device driver via ifnet.
979 * Remove link ifaddr pointer and maybe decrement if_index.
980 * Clean up all addresses.
984 /* We can now free link ifaddr. */
985 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
986 ifa = TAILQ_FIRST(&ifp->if_addrhead);
987 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
993 * Delete all remaining routes using this interface
994 * Unfortuneatly the only way to do this is to slog through
995 * the entire routing table looking for routes which point
996 * to this interface...oh well...
998 for (i = 1; i <= AF_MAX; i++) {
999 for (j = 0; j < rt_numfibs; j++) {
1000 rnh = rt_tables_get_rnh(j, i);
1003 RADIX_NODE_HEAD_LOCK(rnh);
1004 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
1005 RADIX_NODE_HEAD_UNLOCK(rnh);
1009 /* Announce that the interface is gone. */
1010 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1011 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1012 if (IS_DEFAULT_VNET(curvnet))
1013 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1017 * We cannot hold the lock over dom_ifdetach calls as they might
1018 * sleep, for example trying to drain a callout, thus open up the
1019 * theoretical race with re-attaching.
1021 IF_AFDATA_LOCK(ifp);
1022 i = ifp->if_afdata_initialized;
1023 ifp->if_afdata_initialized = 0;
1024 IF_AFDATA_UNLOCK(ifp);
1025 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1026 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1027 (*dp->dom_ifdetach)(ifp,
1028 ifp->if_afdata[dp->dom_family]);
1036 * if_vmove() performs a limited version of if_detach() in current
1037 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1038 * An attempt is made to shrink if_index in current vnet, find an
1039 * unused if_index in target vnet and calls if_grow() if necessary,
1040 * and finally find an unused if_xname for the target vnet.
1043 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1046 struct if_clone *ifc;
1050 * Detach from current vnet, but preserve LLADDR info, do not
1051 * mark as dead etc. so that the ifnet can be reattached later.
1052 * If we cannot find it, we lost the race to someone else.
1054 rc = if_detach_internal(ifp, 1, &ifc);
1059 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1060 * the if_index for that vnet if possible.
1062 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1063 * or we'd lock on one vnet and unlock on another.
1066 ifindex_free_locked(ifp->if_index);
1070 * Perform interface-specific reassignment tasks, if provided by
1073 if (ifp->if_reassign != NULL)
1074 ifp->if_reassign(ifp, new_vnet, NULL);
1077 * Switch to the context of the target vnet.
1079 CURVNET_SET_QUIET(new_vnet);
1082 if (ifindex_alloc_locked(&idx) != 0) {
1084 panic("if_index overflow");
1086 ifp->if_index = idx;
1087 ifnet_setbyindex_locked(ifp->if_index, ifp);
1090 if_attach_internal(ifp, 1, ifc);
1096 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1099 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1104 /* Try to find the prison within our visibility. */
1105 sx_slock(&allprison_lock);
1106 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1107 sx_sunlock(&allprison_lock);
1110 prison_hold_locked(pr);
1111 mtx_unlock(&pr->pr_mtx);
1113 /* Do not try to move the iface from and to the same prison. */
1114 if (pr->pr_vnet == ifp->if_vnet) {
1119 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1120 /* XXX Lock interfaces to avoid races. */
1121 CURVNET_SET_QUIET(pr->pr_vnet);
1122 difp = ifunit(ifname);
1129 /* Move the interface into the child jail/vnet. */
1130 if_vmove(ifp, pr->pr_vnet);
1132 /* Report the new if_xname back to the userland. */
1133 sprintf(ifname, "%s", ifp->if_xname);
1140 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1143 struct vnet *vnet_dst;
1146 /* Try to find the prison within our visibility. */
1147 sx_slock(&allprison_lock);
1148 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1149 sx_sunlock(&allprison_lock);
1152 prison_hold_locked(pr);
1153 mtx_unlock(&pr->pr_mtx);
1155 /* Make sure the named iface exists in the source prison/vnet. */
1156 CURVNET_SET(pr->pr_vnet);
1157 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1164 /* Do not try to move the iface from and to the same prison. */
1165 vnet_dst = TD_TO_VNET(td);
1166 if (vnet_dst == ifp->if_vnet) {
1172 /* Get interface back from child jail/vnet. */
1173 if_vmove(ifp, vnet_dst);
1176 /* Report the new if_xname back to the userland. */
1177 sprintf(ifname, "%s", ifp->if_xname);
1185 * Add a group to an interface
1188 if_addgroup(struct ifnet *ifp, const char *groupname)
1190 struct ifg_list *ifgl;
1191 struct ifg_group *ifg = NULL;
1192 struct ifg_member *ifgm;
1195 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1196 groupname[strlen(groupname) - 1] <= '9')
1200 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1201 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1206 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1207 M_NOWAIT)) == NULL) {
1212 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1213 M_TEMP, M_NOWAIT)) == NULL) {
1219 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1220 if (!strcmp(ifg->ifg_group, groupname))
1224 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1225 M_TEMP, M_NOWAIT)) == NULL) {
1231 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1232 ifg->ifg_refcnt = 0;
1233 TAILQ_INIT(&ifg->ifg_members);
1234 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1239 ifgl->ifgl_group = ifg;
1240 ifgm->ifgm_ifp = ifp;
1243 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1244 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1245 IF_ADDR_WUNLOCK(ifp);
1250 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1251 EVENTHANDLER_INVOKE(group_change_event, groupname);
1257 * Remove a group from an interface
1260 if_delgroup(struct ifnet *ifp, const char *groupname)
1262 struct ifg_list *ifgl;
1263 struct ifg_member *ifgm;
1266 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1267 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1275 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1276 IF_ADDR_WUNLOCK(ifp);
1278 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1279 if (ifgm->ifgm_ifp == ifp)
1283 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1287 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1288 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1290 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1291 free(ifgl->ifgl_group, M_TEMP);
1297 EVENTHANDLER_INVOKE(group_change_event, groupname);
1303 * Remove an interface from all groups
1306 if_delgroups(struct ifnet *ifp)
1308 struct ifg_list *ifgl;
1309 struct ifg_member *ifgm;
1310 char groupname[IFNAMSIZ];
1313 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1314 ifgl = TAILQ_FIRST(&ifp->if_groups);
1316 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1319 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1320 IF_ADDR_WUNLOCK(ifp);
1322 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1323 if (ifgm->ifgm_ifp == ifp)
1327 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1332 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1333 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1335 EVENTHANDLER_INVOKE(group_detach_event,
1337 free(ifgl->ifgl_group, M_TEMP);
1343 EVENTHANDLER_INVOKE(group_change_event, groupname);
1351 * Stores all groups from an interface in memory pointed
1355 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1358 struct ifg_list *ifgl;
1359 struct ifg_req ifgrq, *ifgp;
1360 struct ifgroupreq *ifgr = data;
1362 if (ifgr->ifgr_len == 0) {
1364 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1365 ifgr->ifgr_len += sizeof(struct ifg_req);
1366 IF_ADDR_RUNLOCK(ifp);
1370 len = ifgr->ifgr_len;
1371 ifgp = ifgr->ifgr_groups;
1374 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1375 if (len < sizeof(ifgrq)) {
1376 IF_ADDR_RUNLOCK(ifp);
1379 bzero(&ifgrq, sizeof ifgrq);
1380 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1381 sizeof(ifgrq.ifgrq_group));
1382 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1383 IF_ADDR_RUNLOCK(ifp);
1386 len -= sizeof(ifgrq);
1389 IF_ADDR_RUNLOCK(ifp);
1395 * Stores all members of a group in memory pointed to by data
1398 if_getgroupmembers(struct ifgroupreq *data)
1400 struct ifgroupreq *ifgr = data;
1401 struct ifg_group *ifg;
1402 struct ifg_member *ifgm;
1403 struct ifg_req ifgrq, *ifgp;
1407 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1408 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1415 if (ifgr->ifgr_len == 0) {
1416 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1417 ifgr->ifgr_len += sizeof(ifgrq);
1422 len = ifgr->ifgr_len;
1423 ifgp = ifgr->ifgr_groups;
1424 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1425 if (len < sizeof(ifgrq)) {
1429 bzero(&ifgrq, sizeof ifgrq);
1430 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1431 sizeof(ifgrq.ifgrq_member));
1432 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1436 len -= sizeof(ifgrq);
1445 * Delete Routes for a Network Interface
1447 * Called for each routing entry via the rnh->rnh_walktree() call above
1448 * to delete all route entries referencing a detaching network interface.
1451 * rn pointer to node in the routing table
1452 * arg argument passed to rnh->rnh_walktree() - detaching interface
1456 * errno failed - reason indicated
1460 if_rtdel(struct radix_node *rn, void *arg)
1462 struct rtentry *rt = (struct rtentry *)rn;
1463 struct ifnet *ifp = arg;
1466 if (rt->rt_ifp == ifp) {
1469 * Protect (sorta) against walktree recursion problems
1470 * with cloned routes
1472 if ((rt->rt_flags & RTF_UP) == 0)
1475 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1477 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED,
1478 (struct rtentry **) NULL, rt->rt_fibnum);
1480 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1488 * A compatibility function returns ifnet counter values.
1491 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1494 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1496 case IFCOUNTER_IPACKETS:
1497 return (ifp->if_ipackets);
1498 case IFCOUNTER_IERRORS:
1499 return (ifp->if_ierrors);
1500 case IFCOUNTER_OPACKETS:
1501 return (ifp->if_opackets);
1502 case IFCOUNTER_OERRORS:
1503 return (ifp->if_oerrors);
1504 case IFCOUNTER_COLLISIONS:
1505 return (ifp->if_collisions);
1506 case IFCOUNTER_IBYTES:
1507 return (ifp->if_ibytes);
1508 case IFCOUNTER_OBYTES:
1509 return (ifp->if_obytes);
1510 case IFCOUNTER_IMCASTS:
1511 return (ifp->if_imcasts);
1512 case IFCOUNTER_OMCASTS:
1513 return (ifp->if_omcasts);
1514 case IFCOUNTER_IQDROPS:
1515 return (ifp->if_iqdrops);
1517 case IFCOUNTER_OQDROPS:
1518 return (ifp->if_oqdrops);
1520 case IFCOUNTER_NOPROTO:
1521 return (ifp->if_noproto);
1529 * Increase an ifnet counter. Usually used for counters shared
1530 * between the stack and a driver, but function supports them all.
1533 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1536 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1538 case IFCOUNTER_IPACKETS:
1539 ifp->if_ipackets += inc;
1541 case IFCOUNTER_IERRORS:
1542 ifp->if_ierrors += inc;
1544 case IFCOUNTER_OPACKETS:
1545 ifp->if_opackets += inc;
1547 case IFCOUNTER_OERRORS:
1548 ifp->if_oerrors += inc;
1550 case IFCOUNTER_COLLISIONS:
1551 ifp->if_collisions += inc;
1553 case IFCOUNTER_IBYTES:
1554 ifp->if_ibytes += inc;
1556 case IFCOUNTER_OBYTES:
1557 ifp->if_obytes += inc;
1559 case IFCOUNTER_IMCASTS:
1560 ifp->if_imcasts += inc;
1562 case IFCOUNTER_OMCASTS:
1563 ifp->if_omcasts += inc;
1565 case IFCOUNTER_IQDROPS:
1566 ifp->if_iqdrops += inc;
1569 case IFCOUNTER_OQDROPS:
1570 ifp->if_oqdrops += inc;
1573 case IFCOUNTER_NOPROTO:
1574 ifp->if_noproto += inc;
1582 * Wrapper functions for struct ifnet address list locking macros. These are
1583 * used by kernel modules to avoid encoding programming interface or binary
1584 * interface assumptions that may be violated when kernel-internal locking
1585 * approaches change.
1588 if_addr_rlock(struct ifnet *ifp)
1595 if_addr_runlock(struct ifnet *ifp)
1598 IF_ADDR_RUNLOCK(ifp);
1602 if_maddr_rlock(struct ifnet *ifp)
1609 if_maddr_runlock(struct ifnet *ifp)
1612 IF_ADDR_RUNLOCK(ifp);
1616 * Initialization, destruction and refcounting functions for ifaddrs.
1619 ifa_init(struct ifaddr *ifa)
1622 mtx_init(&ifa->ifa_mtx, "ifaddr", NULL, MTX_DEF);
1623 refcount_init(&ifa->ifa_refcnt, 1);
1624 ifa->if_data.ifi_datalen = sizeof(ifa->if_data);
1628 ifa_ref(struct ifaddr *ifa)
1631 refcount_acquire(&ifa->ifa_refcnt);
1635 ifa_free(struct ifaddr *ifa)
1638 if (refcount_release(&ifa->ifa_refcnt)) {
1639 mtx_destroy(&ifa->ifa_mtx);
1640 free(ifa, M_IFADDR);
1645 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1648 struct rtentry *rt = NULL;
1649 struct rt_addrinfo info;
1650 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
1652 bzero(&info, sizeof(info));
1653 info.rti_ifp = V_loif;
1654 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1655 info.rti_info[RTAX_DST] = ia;
1656 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1657 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib);
1659 if (error == 0 && rt != NULL) {
1661 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1662 ifa->ifa_ifp->if_type;
1663 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1664 ifa->ifa_ifp->if_index;
1667 } else if (error != 0)
1668 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error);
1674 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1677 struct rt_addrinfo info;
1678 struct sockaddr_dl null_sdl;
1680 bzero(&null_sdl, sizeof(null_sdl));
1681 null_sdl.sdl_len = sizeof(null_sdl);
1682 null_sdl.sdl_family = AF_LINK;
1683 null_sdl.sdl_type = ifa->ifa_ifp->if_type;
1684 null_sdl.sdl_index = ifa->ifa_ifp->if_index;
1685 bzero(&info, sizeof(info));
1686 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1687 info.rti_info[RTAX_DST] = ia;
1688 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1689 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib);
1692 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error);
1698 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1699 * structs used to represent other address families, it is necessary
1700 * to perform a different comparison.
1703 #define sa_equal(a1, a2) \
1704 (bcmp((a1), (a2), ((a1))->sa_len) == 0)
1706 #define sa_dl_equal(a1, a2) \
1707 ((((struct sockaddr_dl *)(a1))->sdl_len == \
1708 ((struct sockaddr_dl *)(a2))->sdl_len) && \
1709 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
1710 LLADDR((struct sockaddr_dl *)(a2)), \
1711 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1714 * Locate an interface based on a complete address.
1717 static struct ifaddr *
1718 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref)
1723 IFNET_RLOCK_NOSLEEP();
1724 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1726 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1727 if (ifa->ifa_addr->sa_family != addr->sa_family)
1729 if (sa_equal(addr, ifa->ifa_addr)) {
1732 IF_ADDR_RUNLOCK(ifp);
1735 /* IP6 doesn't have broadcast */
1736 if ((ifp->if_flags & IFF_BROADCAST) &&
1737 ifa->ifa_broadaddr &&
1738 ifa->ifa_broadaddr->sa_len != 0 &&
1739 sa_equal(ifa->ifa_broadaddr, addr)) {
1742 IF_ADDR_RUNLOCK(ifp);
1746 IF_ADDR_RUNLOCK(ifp);
1750 IFNET_RUNLOCK_NOSLEEP();
1755 ifa_ifwithaddr(struct sockaddr *addr)
1758 return (ifa_ifwithaddr_internal(addr, 1));
1762 ifa_ifwithaddr_check(struct sockaddr *addr)
1765 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1769 * Locate an interface based on the broadcast address.
1773 ifa_ifwithbroadaddr(struct sockaddr *addr)
1778 IFNET_RLOCK_NOSLEEP();
1779 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1781 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1782 if (ifa->ifa_addr->sa_family != addr->sa_family)
1784 if ((ifp->if_flags & IFF_BROADCAST) &&
1785 ifa->ifa_broadaddr &&
1786 ifa->ifa_broadaddr->sa_len != 0 &&
1787 sa_equal(ifa->ifa_broadaddr, addr)) {
1789 IF_ADDR_RUNLOCK(ifp);
1793 IF_ADDR_RUNLOCK(ifp);
1797 IFNET_RUNLOCK_NOSLEEP();
1802 * Locate the point to point interface with a given destination address.
1806 ifa_ifwithdstaddr_fib(struct sockaddr *addr, int fibnum)
1811 IFNET_RLOCK_NOSLEEP();
1812 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1813 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1815 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1818 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1819 if (ifa->ifa_addr->sa_family != addr->sa_family)
1821 if (ifa->ifa_dstaddr != NULL &&
1822 sa_equal(addr, ifa->ifa_dstaddr)) {
1824 IF_ADDR_RUNLOCK(ifp);
1828 IF_ADDR_RUNLOCK(ifp);
1832 IFNET_RUNLOCK_NOSLEEP();
1837 ifa_ifwithdstaddr(struct sockaddr *addr)
1840 return (ifa_ifwithdstaddr_fib(addr, RT_ALL_FIBS));
1844 * Find an interface on a specific network. If many, choice
1845 * is most specific found.
1848 ifa_ifwithnet_fib(struct sockaddr *addr, int ignore_ptp, int fibnum)
1852 struct ifaddr *ifa_maybe = NULL;
1853 u_int af = addr->sa_family;
1854 char *addr_data = addr->sa_data, *cplim;
1857 * AF_LINK addresses can be looked up directly by their index number,
1858 * so do that if we can.
1860 if (af == AF_LINK) {
1861 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1862 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1863 return (ifaddr_byindex(sdl->sdl_index));
1867 * Scan though each interface, looking for ones that have addresses
1868 * in this address family and the requested fib. Maintain a reference
1869 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1870 * kept it stable when we move onto the next interface.
1872 IFNET_RLOCK_NOSLEEP();
1873 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1874 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1877 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1878 char *cp, *cp2, *cp3;
1880 if (ifa->ifa_addr->sa_family != af)
1882 if (af == AF_INET &&
1883 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1885 * This is a bit broken as it doesn't
1886 * take into account that the remote end may
1887 * be a single node in the network we are
1889 * The trouble is that we don't know the
1890 * netmask for the remote end.
1892 if (ifa->ifa_dstaddr != NULL &&
1893 sa_equal(addr, ifa->ifa_dstaddr)) {
1895 IF_ADDR_RUNLOCK(ifp);
1900 * if we have a special address handler,
1901 * then use it instead of the generic one.
1903 if (ifa->ifa_claim_addr) {
1904 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
1906 IF_ADDR_RUNLOCK(ifp);
1913 * Scan all the bits in the ifa's address.
1914 * If a bit dissagrees with what we are
1915 * looking for, mask it with the netmask
1916 * to see if it really matters.
1917 * (A byte at a time)
1919 if (ifa->ifa_netmask == 0)
1922 cp2 = ifa->ifa_addr->sa_data;
1923 cp3 = ifa->ifa_netmask->sa_data;
1924 cplim = ifa->ifa_netmask->sa_len
1925 + (char *)ifa->ifa_netmask;
1927 if ((*cp++ ^ *cp2++) & *cp3++)
1928 goto next; /* next address! */
1930 * If the netmask of what we just found
1931 * is more specific than what we had before
1932 * (if we had one), or if the virtual status
1933 * of new prefix is better than of the old one,
1934 * then remember the new one before continuing
1935 * to search for an even better one.
1937 if (ifa_maybe == NULL ||
1938 ifa_preferred(ifa_maybe, ifa) ||
1939 rn_refines((caddr_t)ifa->ifa_netmask,
1940 (caddr_t)ifa_maybe->ifa_netmask)) {
1941 if (ifa_maybe != NULL)
1942 ifa_free(ifa_maybe);
1948 IF_ADDR_RUNLOCK(ifp);
1953 IFNET_RUNLOCK_NOSLEEP();
1954 if (ifa_maybe != NULL)
1955 ifa_free(ifa_maybe);
1960 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp)
1963 return (ifa_ifwithnet_fib(addr, ignore_ptp, RT_ALL_FIBS));
1967 * Find an interface address specific to an interface best matching
1971 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1974 char *cp, *cp2, *cp3;
1976 struct ifaddr *ifa_maybe = NULL;
1977 u_int af = addr->sa_family;
1982 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1983 if (ifa->ifa_addr->sa_family != af)
1985 if (ifa_maybe == NULL)
1987 if (ifa->ifa_netmask == 0) {
1988 if (sa_equal(addr, ifa->ifa_addr) ||
1989 (ifa->ifa_dstaddr &&
1990 sa_equal(addr, ifa->ifa_dstaddr)))
1994 if (ifp->if_flags & IFF_POINTOPOINT) {
1995 if (sa_equal(addr, ifa->ifa_dstaddr))
1999 cp2 = ifa->ifa_addr->sa_data;
2000 cp3 = ifa->ifa_netmask->sa_data;
2001 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2002 for (; cp3 < cplim; cp3++)
2003 if ((*cp++ ^ *cp2++) & *cp3)
2013 IF_ADDR_RUNLOCK(ifp);
2018 * See whether new ifa is better than current one:
2019 * 1) A non-virtual one is preferred over virtual.
2020 * 2) A virtual in master state preferred over any other state.
2022 * Used in several address selecting functions.
2025 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2028 return (cur->ifa_carp && (!next->ifa_carp ||
2029 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2032 #include <net/if_llatbl.h>
2035 * Default action when installing a route with a Link Level gateway.
2036 * Lookup an appropriate real ifa to point to.
2037 * This should be moved to /sys/net/link.c eventually.
2040 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2042 struct ifaddr *ifa, *oifa;
2043 struct sockaddr *dst;
2048 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
2049 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
2051 ifa = ifaof_ifpforaddr(dst, ifp);
2056 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2057 ifa->ifa_rtrequest(cmd, rt, info);
2062 * Mark an interface down and notify protocols of
2066 if_unroute(struct ifnet *ifp, int flag, int fam)
2070 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2072 ifp->if_flags &= ~flag;
2073 getmicrotime(&ifp->if_lastchange);
2074 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2075 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2076 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2077 ifp->if_qflush(ifp);
2080 (*carp_linkstate_p)(ifp);
2085 * Mark an interface up and notify protocols of
2089 if_route(struct ifnet *ifp, int flag, int fam)
2093 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2095 ifp->if_flags |= flag;
2096 getmicrotime(&ifp->if_lastchange);
2097 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2098 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2099 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2101 (*carp_linkstate_p)(ifp);
2108 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2109 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2110 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2111 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2112 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2113 int (*vlan_setcookie_p)(struct ifnet *, void *);
2114 void *(*vlan_cookie_p)(struct ifnet *);
2117 * Handle a change in the interface link state. To avoid LORs
2118 * between driver lock and upper layer locks, as well as possible
2119 * recursions, we post event to taskqueue, and all job
2120 * is done in static do_link_state_change().
2123 if_link_state_change(struct ifnet *ifp, int link_state)
2125 /* Return if state hasn't changed. */
2126 if (ifp->if_link_state == link_state)
2129 ifp->if_link_state = link_state;
2131 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2135 do_link_state_change(void *arg, int pending)
2137 struct ifnet *ifp = (struct ifnet *)arg;
2138 int link_state = ifp->if_link_state;
2139 CURVNET_SET(ifp->if_vnet);
2141 /* Notify that the link state has changed. */
2143 if (ifp->if_vlantrunk != NULL)
2144 (*vlan_link_state_p)(ifp);
2146 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2147 IFP2AC(ifp)->ac_netgraph != NULL)
2148 (*ng_ether_link_state_p)(ifp, link_state);
2150 (*carp_linkstate_p)(ifp);
2152 (*bridge_linkstate_p)(ifp);
2154 (*lagg_linkstate_p)(ifp, link_state);
2156 if (IS_DEFAULT_VNET(curvnet))
2157 devctl_notify("IFNET", ifp->if_xname,
2158 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2161 if_printf(ifp, "%d link states coalesced\n", pending);
2162 if (log_link_state_change)
2163 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2164 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2165 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2170 * Mark an interface down and notify protocols of
2174 if_down(struct ifnet *ifp)
2177 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2181 * Mark an interface up and notify protocols of
2185 if_up(struct ifnet *ifp)
2188 if_route(ifp, IFF_UP, AF_UNSPEC);
2192 * Flush an interface queue.
2195 if_qflush(struct ifnet *ifp)
2203 if (ALTQ_IS_ENABLED(ifq))
2207 while ((m = n) != 0) {
2218 * Map interface name to interface structure pointer, with or without
2219 * returning a reference.
2222 ifunit_ref(const char *name)
2226 IFNET_RLOCK_NOSLEEP();
2227 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2228 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2229 !(ifp->if_flags & IFF_DYING))
2234 IFNET_RUNLOCK_NOSLEEP();
2239 ifunit(const char *name)
2243 IFNET_RLOCK_NOSLEEP();
2244 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2245 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2248 IFNET_RUNLOCK_NOSLEEP();
2253 * Hardware specific interface ioctls.
2256 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2261 int new_flags, temp_flags;
2262 size_t namelen, onamelen;
2264 char *descrbuf, *odescrbuf;
2265 char new_name[IFNAMSIZ];
2267 struct sockaddr_dl *sdl;
2269 ifr = (struct ifreq *)data;
2272 ifr->ifr_index = ifp->if_index;
2276 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2277 ifr->ifr_flags = temp_flags & 0xffff;
2278 ifr->ifr_flagshigh = temp_flags >> 16;
2282 ifr->ifr_reqcap = ifp->if_capabilities;
2283 ifr->ifr_curcap = ifp->if_capenable;
2288 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2293 ifr->ifr_metric = ifp->if_metric;
2297 ifr->ifr_mtu = ifp->if_mtu;
2301 ifr->ifr_phys = ifp->if_physical;
2306 sx_slock(&ifdescr_sx);
2307 if (ifp->if_description == NULL)
2310 /* space for terminating nul */
2311 descrlen = strlen(ifp->if_description) + 1;
2312 if (ifr->ifr_buffer.length < descrlen)
2313 ifr->ifr_buffer.buffer = NULL;
2315 error = copyout(ifp->if_description,
2316 ifr->ifr_buffer.buffer, descrlen);
2317 ifr->ifr_buffer.length = descrlen;
2319 sx_sunlock(&ifdescr_sx);
2323 error = priv_check(td, PRIV_NET_SETIFDESCR);
2328 * Copy only (length-1) bytes to make sure that
2329 * if_description is always nul terminated. The
2330 * length parameter is supposed to count the
2331 * terminating nul in.
2333 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2334 return (ENAMETOOLONG);
2335 else if (ifr->ifr_buffer.length == 0)
2338 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2340 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2341 ifr->ifr_buffer.length - 1);
2343 free(descrbuf, M_IFDESCR);
2348 sx_xlock(&ifdescr_sx);
2349 odescrbuf = ifp->if_description;
2350 ifp->if_description = descrbuf;
2351 sx_xunlock(&ifdescr_sx);
2353 getmicrotime(&ifp->if_lastchange);
2354 free(odescrbuf, M_IFDESCR);
2358 ifr->ifr_fib = ifp->if_fib;
2362 error = priv_check(td, PRIV_NET_SETIFFIB);
2365 if (ifr->ifr_fib >= rt_numfibs)
2368 ifp->if_fib = ifr->ifr_fib;
2372 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2376 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2377 * check, so we don't need special handling here yet.
2379 new_flags = (ifr->ifr_flags & 0xffff) |
2380 (ifr->ifr_flagshigh << 16);
2381 if (ifp->if_flags & IFF_SMART) {
2382 /* Smart drivers twiddle their own routes */
2383 } else if (ifp->if_flags & IFF_UP &&
2384 (new_flags & IFF_UP) == 0) {
2386 } else if (new_flags & IFF_UP &&
2387 (ifp->if_flags & IFF_UP) == 0) {
2390 /* See if permanently promiscuous mode bit is about to flip */
2391 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2392 if (new_flags & IFF_PPROMISC)
2393 ifp->if_flags |= IFF_PROMISC;
2394 else if (ifp->if_pcount == 0)
2395 ifp->if_flags &= ~IFF_PROMISC;
2396 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2398 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
2400 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2401 (new_flags &~ IFF_CANTCHANGE);
2402 if (ifp->if_ioctl) {
2403 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2405 getmicrotime(&ifp->if_lastchange);
2409 error = priv_check(td, PRIV_NET_SETIFCAP);
2412 if (ifp->if_ioctl == NULL)
2413 return (EOPNOTSUPP);
2414 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2416 error = (*ifp->if_ioctl)(ifp, cmd, data);
2418 getmicrotime(&ifp->if_lastchange);
2423 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2428 error = priv_check(td, PRIV_NET_SETIFNAME);
2431 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2434 if (new_name[0] == '\0')
2436 if (ifunit(new_name) != NULL)
2440 * XXX: Locking. Nothing else seems to lock if_flags,
2441 * and there are numerous other races with the
2442 * ifunit() checks not being atomic with namespace
2443 * changes (renames, vmoves, if_attach, etc).
2445 ifp->if_flags |= IFF_RENAMING;
2447 /* Announce the departure of the interface. */
2448 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2449 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2451 log(LOG_INFO, "%s: changing name to '%s'\n",
2452 ifp->if_xname, new_name);
2454 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2457 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2458 namelen = strlen(new_name);
2459 onamelen = sdl->sdl_nlen;
2461 * Move the address if needed. This is safe because we
2462 * allocate space for a name of length IFNAMSIZ when we
2463 * create this in if_attach().
2465 if (namelen != onamelen) {
2466 bcopy(sdl->sdl_data + onamelen,
2467 sdl->sdl_data + namelen, sdl->sdl_alen);
2469 bcopy(new_name, sdl->sdl_data, namelen);
2470 sdl->sdl_nlen = namelen;
2471 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2472 bzero(sdl->sdl_data, onamelen);
2473 while (namelen != 0)
2474 sdl->sdl_data[--namelen] = 0xff;
2477 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2478 /* Announce the return of the interface. */
2479 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2481 ifp->if_flags &= ~IFF_RENAMING;
2486 error = priv_check(td, PRIV_NET_SETIFVNET);
2489 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2494 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2497 ifp->if_metric = ifr->ifr_metric;
2498 getmicrotime(&ifp->if_lastchange);
2502 error = priv_check(td, PRIV_NET_SETIFPHYS);
2505 if (ifp->if_ioctl == NULL)
2506 return (EOPNOTSUPP);
2507 error = (*ifp->if_ioctl)(ifp, cmd, data);
2509 getmicrotime(&ifp->if_lastchange);
2514 u_long oldmtu = ifp->if_mtu;
2516 error = priv_check(td, PRIV_NET_SETIFMTU);
2519 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2521 if (ifp->if_ioctl == NULL)
2522 return (EOPNOTSUPP);
2523 error = (*ifp->if_ioctl)(ifp, cmd, data);
2525 getmicrotime(&ifp->if_lastchange);
2529 * If the link MTU changed, do network layer specific procedure.
2531 if (ifp->if_mtu != oldmtu) {
2541 if (cmd == SIOCADDMULTI)
2542 error = priv_check(td, PRIV_NET_ADDMULTI);
2544 error = priv_check(td, PRIV_NET_DELMULTI);
2548 /* Don't allow group membership on non-multicast interfaces. */
2549 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2550 return (EOPNOTSUPP);
2552 /* Don't let users screw up protocols' entries. */
2553 if (ifr->ifr_addr.sa_family != AF_LINK)
2556 if (cmd == SIOCADDMULTI) {
2557 struct ifmultiaddr *ifma;
2560 * Userland is only permitted to join groups once
2561 * via the if_addmulti() KPI, because it cannot hold
2562 * struct ifmultiaddr * between calls. It may also
2563 * lose a race while we check if the membership
2567 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2568 IF_ADDR_RUNLOCK(ifp);
2572 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2574 error = if_delmulti(ifp, &ifr->ifr_addr);
2577 getmicrotime(&ifp->if_lastchange);
2580 case SIOCSIFPHYADDR:
2581 case SIOCDIFPHYADDR:
2583 case SIOCSIFPHYADDR_IN6:
2585 case SIOCSLIFPHYADDR:
2587 case SIOCSIFGENERIC:
2588 error = priv_check(td, PRIV_NET_HWIOCTL);
2591 if (ifp->if_ioctl == NULL)
2592 return (EOPNOTSUPP);
2593 error = (*ifp->if_ioctl)(ifp, cmd, data);
2595 getmicrotime(&ifp->if_lastchange);
2599 ifs = (struct ifstat *)data;
2600 ifs->ascii[0] = '\0';
2602 case SIOCGIFPSRCADDR:
2603 case SIOCGIFPDSTADDR:
2604 case SIOCGLIFPHYADDR:
2607 case SIOCGIFGENERIC:
2608 if (ifp->if_ioctl == NULL)
2609 return (EOPNOTSUPP);
2610 error = (*ifp->if_ioctl)(ifp, cmd, data);
2614 error = priv_check(td, PRIV_NET_SETLLADDR);
2617 error = if_setlladdr(ifp,
2618 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2619 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2624 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2626 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2629 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2635 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2641 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2643 error = priv_check(td, PRIV_NET_DELIFGROUP);
2646 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2658 #ifdef COMPAT_FREEBSD32
2666 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2673 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2680 CURVNET_SET(so->so_vnet);
2684 error = ifconf(cmd, data);
2688 #ifdef COMPAT_FREEBSD32
2691 struct ifconf32 *ifc32;
2694 ifc32 = (struct ifconf32 *)data;
2695 ifc.ifc_len = ifc32->ifc_len;
2696 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2698 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2701 ifc32->ifc_len = ifc.ifc_len;
2706 ifr = (struct ifreq *)data;
2711 error = priv_check(td, PRIV_NET_SETIFVNET);
2713 error = if_vmove_reclaim(td, ifr->ifr_name,
2720 error = priv_check(td, PRIV_NET_IFCREATE);
2722 error = if_clone_create(ifr->ifr_name,
2723 sizeof(ifr->ifr_name),
2724 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2728 error = priv_check(td, PRIV_NET_IFDESTROY);
2730 error = if_clone_destroy(ifr->ifr_name);
2734 case SIOCIFGCLONERS:
2735 error = if_clone_list((struct if_clonereq *)data);
2739 error = if_getgroupmembers((struct ifgroupreq *)data);
2742 #if defined(INET) || defined(INET6)
2745 if (carp_ioctl_p == NULL)
2746 error = EPROTONOSUPPORT;
2748 error = (*carp_ioctl_p)(ifr, cmd, td);
2754 ifp = ifunit_ref(ifr->ifr_name);
2760 error = ifhwioctl(cmd, ifp, data, td);
2761 if (error != ENOIOCTL) {
2767 oif_flags = ifp->if_flags;
2768 if (so->so_proto == NULL) {
2771 return (EOPNOTSUPP);
2775 * Pass the request on to the socket control method, and if the
2776 * latter returns EOPNOTSUPP, directly to the interface.
2778 * Make an exception for the legacy SIOCSIF* requests. Drivers
2779 * trust SIOCSIFADDR et al to come from an already privileged
2780 * layer, and do not perform any credentials checks or input
2784 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
2787 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2788 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2789 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2790 error = (*ifp->if_ioctl)(ifp, cmd, data);
2797 case SIOCSIFDSTADDR:
2799 case SIOCSIFBRDADDR:
2800 case SIOCSIFNETMASK:
2801 #if BYTE_ORDER != BIG_ENDIAN
2802 if (ifr->ifr_addr.sa_family == 0 &&
2803 ifr->ifr_addr.sa_len < 16) {
2804 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
2805 ifr->ifr_addr.sa_len = 16;
2808 if (ifr->ifr_addr.sa_len == 0)
2809 ifr->ifr_addr.sa_len = 16;
2817 case OSIOCGIFDSTADDR:
2818 cmd = SIOCGIFDSTADDR;
2821 case OSIOCGIFBRDADDR:
2822 cmd = SIOCGIFBRDADDR;
2825 case OSIOCGIFNETMASK:
2826 cmd = SIOCGIFNETMASK;
2828 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
2832 if (error == EOPNOTSUPP && ifp != NULL &&
2833 ifp->if_ioctl != NULL &&
2834 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2835 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2836 error = (*ifp->if_ioctl)(ifp, cmd, data);
2840 case OSIOCGIFDSTADDR:
2841 case OSIOCGIFBRDADDR:
2842 case OSIOCGIFNETMASK:
2843 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
2847 #endif /* COMPAT_43 */
2849 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2851 if (ifp->if_flags & IFF_UP)
2861 * The code common to handling reference counted flags,
2862 * e.g., in ifpromisc() and if_allmulti().
2863 * The "pflag" argument can specify a permanent mode flag to check,
2864 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2866 * Only to be used on stack-owned flags, not driver-owned flags.
2869 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2873 int oldflags, oldcount;
2875 /* Sanity checks to catch programming errors */
2876 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2877 ("%s: setting driver-owned flag %d", __func__, flag));
2880 KASSERT(*refcount >= 0,
2881 ("%s: increment negative refcount %d for flag %d",
2882 __func__, *refcount, flag));
2884 KASSERT(*refcount > 0,
2885 ("%s: decrement non-positive refcount %d for flag %d",
2886 __func__, *refcount, flag));
2888 /* In case this mode is permanent, just touch refcount */
2889 if (ifp->if_flags & pflag) {
2890 *refcount += onswitch ? 1 : -1;
2894 /* Save ifnet parameters for if_ioctl() may fail */
2895 oldcount = *refcount;
2896 oldflags = ifp->if_flags;
2899 * See if we aren't the only and touching refcount is enough.
2900 * Actually toggle interface flag if we are the first or last.
2905 ifp->if_flags |= flag;
2909 ifp->if_flags &= ~flag;
2912 /* Call down the driver since we've changed interface flags */
2913 if (ifp->if_ioctl == NULL) {
2917 ifr.ifr_flags = ifp->if_flags & 0xffff;
2918 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2919 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2922 /* Notify userland that interface flags have changed */
2927 /* Recover after driver error */
2928 *refcount = oldcount;
2929 ifp->if_flags = oldflags;
2934 * Set/clear promiscuous mode on interface ifp based on the truth value
2935 * of pswitch. The calls are reference counted so that only the first
2936 * "on" request actually has an effect, as does the final "off" request.
2937 * Results are undefined if the "off" and "on" requests are not matched.
2940 ifpromisc(struct ifnet *ifp, int pswitch)
2943 int oldflags = ifp->if_flags;
2945 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2946 &ifp->if_pcount, pswitch);
2947 /* If promiscuous mode status has changed, log a message */
2948 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
2949 log(LOG_INFO, "%s: promiscuous mode %s\n",
2951 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2956 * Return interface configuration
2957 * of system. List may be used
2958 * in later ioctl's (above) to get
2959 * other information.
2963 ifconf(u_long cmd, caddr_t data)
2965 struct ifconf *ifc = (struct ifconf *)data;
2970 int error, full = 0, valid_len, max_len;
2972 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2973 max_len = MAXPHYS - 1;
2975 /* Prevent hostile input from being able to crash the system */
2976 if (ifc->ifc_len <= 0)
2980 if (ifc->ifc_len <= max_len) {
2981 max_len = ifc->ifc_len;
2984 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2989 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2993 * Zero the ifr_name buffer to make sure we don't
2994 * disclose the contents of the stack.
2996 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2998 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2999 >= sizeof(ifr.ifr_name)) {
3002 return (ENAMETOOLONG);
3007 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3008 struct sockaddr *sa = ifa->ifa_addr;
3010 if (prison_if(curthread->td_ucred, sa) != 0)
3014 if (cmd == OSIOCGIFCONF) {
3015 struct osockaddr *osa =
3016 (struct osockaddr *)&ifr.ifr_addr;
3018 osa->sa_family = sa->sa_family;
3019 sbuf_bcat(sb, &ifr, sizeof(ifr));
3020 max_len += sizeof(ifr);
3023 if (sa->sa_len <= sizeof(*sa)) {
3025 sbuf_bcat(sb, &ifr, sizeof(ifr));
3026 max_len += sizeof(ifr);
3029 offsetof(struct ifreq, ifr_addr));
3030 max_len += offsetof(struct ifreq, ifr_addr);
3031 sbuf_bcat(sb, sa, sa->sa_len);
3032 max_len += sa->sa_len;
3035 if (sbuf_error(sb) == 0)
3036 valid_len = sbuf_len(sb);
3038 IF_ADDR_RUNLOCK(ifp);
3040 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3041 sbuf_bcat(sb, &ifr, sizeof(ifr));
3042 max_len += sizeof(ifr);
3044 if (sbuf_error(sb) == 0)
3045 valid_len = sbuf_len(sb);
3051 * If we didn't allocate enough space (uncommon), try again. If
3052 * we have already allocated as much space as we are allowed,
3053 * return what we've got.
3055 if (valid_len != max_len && !full) {
3060 ifc->ifc_len = valid_len;
3062 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3068 * Just like ifpromisc(), but for all-multicast-reception mode.
3071 if_allmulti(struct ifnet *ifp, int onswitch)
3074 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3077 struct ifmultiaddr *
3078 if_findmulti(struct ifnet *ifp, struct sockaddr *sa)
3080 struct ifmultiaddr *ifma;
3082 IF_ADDR_LOCK_ASSERT(ifp);
3084 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3085 if (sa->sa_family == AF_LINK) {
3086 if (sa_dl_equal(ifma->ifma_addr, sa))
3089 if (sa_equal(ifma->ifma_addr, sa))
3098 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3099 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3100 * the ifnet multicast address list here, so the caller must do that and
3101 * other setup work (such as notifying the device driver). The reference
3102 * count is initialized to 1.
3104 static struct ifmultiaddr *
3105 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3108 struct ifmultiaddr *ifma;
3109 struct sockaddr *dupsa;
3111 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3116 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3117 if (dupsa == NULL) {
3118 free(ifma, M_IFMADDR);
3121 bcopy(sa, dupsa, sa->sa_len);
3122 ifma->ifma_addr = dupsa;
3124 ifma->ifma_ifp = ifp;
3125 ifma->ifma_refcount = 1;
3126 ifma->ifma_protospec = NULL;
3129 ifma->ifma_lladdr = NULL;
3133 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3134 if (dupsa == NULL) {
3135 free(ifma->ifma_addr, M_IFMADDR);
3136 free(ifma, M_IFMADDR);
3139 bcopy(llsa, dupsa, llsa->sa_len);
3140 ifma->ifma_lladdr = dupsa;
3146 * if_freemulti: free ifmultiaddr structure and possibly attached related
3147 * addresses. The caller is responsible for implementing reference
3148 * counting, notifying the driver, handling routing messages, and releasing
3149 * any dependent link layer state.
3152 if_freemulti(struct ifmultiaddr *ifma)
3155 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3156 ifma->ifma_refcount));
3157 KASSERT(ifma->ifma_protospec == NULL,
3158 ("if_freemulti: protospec not NULL"));
3160 if (ifma->ifma_lladdr != NULL)
3161 free(ifma->ifma_lladdr, M_IFMADDR);
3162 free(ifma->ifma_addr, M_IFMADDR);
3163 free(ifma, M_IFMADDR);
3167 * Register an additional multicast address with a network interface.
3169 * - If the address is already present, bump the reference count on the
3170 * address and return.
3171 * - If the address is not link-layer, look up a link layer address.
3172 * - Allocate address structures for one or both addresses, and attach to the
3173 * multicast address list on the interface. If automatically adding a link
3174 * layer address, the protocol address will own a reference to the link
3175 * layer address, to be freed when it is freed.
3176 * - Notify the network device driver of an addition to the multicast address
3179 * 'sa' points to caller-owned memory with the desired multicast address.
3181 * 'retifma' will be used to return a pointer to the resulting multicast
3182 * address reference, if desired.
3185 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3186 struct ifmultiaddr **retifma)
3188 struct ifmultiaddr *ifma, *ll_ifma;
3189 struct sockaddr *llsa;
3193 * If the address is already present, return a new reference to it;
3194 * otherwise, allocate storage and set up a new address.
3197 ifma = if_findmulti(ifp, sa);
3199 ifma->ifma_refcount++;
3200 if (retifma != NULL)
3202 IF_ADDR_WUNLOCK(ifp);
3207 * The address isn't already present; resolve the protocol address
3208 * into a link layer address, and then look that up, bump its
3209 * refcount or allocate an ifma for that also. If 'llsa' was
3210 * returned, we will need to free it later.
3214 if (ifp->if_resolvemulti != NULL) {
3215 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3221 * Allocate the new address. Don't hook it up yet, as we may also
3222 * need to allocate a link layer multicast address.
3224 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3231 * If a link layer address is found, we'll need to see if it's
3232 * already present in the address list, or allocate is as well.
3233 * When this block finishes, the link layer address will be on the
3237 ll_ifma = if_findmulti(ifp, llsa);
3238 if (ll_ifma == NULL) {
3239 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3240 if (ll_ifma == NULL) {
3241 --ifma->ifma_refcount;
3246 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3249 ll_ifma->ifma_refcount++;
3250 ifma->ifma_llifma = ll_ifma;
3254 * We now have a new multicast address, ifma, and possibly a new or
3255 * referenced link layer address. Add the primary address to the
3256 * ifnet address list.
3258 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3260 if (retifma != NULL)
3264 * Must generate the message while holding the lock so that 'ifma'
3265 * pointer is still valid.
3267 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3268 IF_ADDR_WUNLOCK(ifp);
3271 * We are certain we have added something, so call down to the
3272 * interface to let them know about it.
3274 if (ifp->if_ioctl != NULL) {
3275 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3279 free(llsa, M_IFMADDR);
3285 free(llsa, M_IFMADDR);
3288 IF_ADDR_WUNLOCK(ifp);
3293 * Delete a multicast group membership by network-layer group address.
3295 * Returns ENOENT if the entry could not be found. If ifp no longer
3296 * exists, results are undefined. This entry point should only be used
3297 * from subsystems which do appropriate locking to hold ifp for the
3298 * duration of the call.
3299 * Network-layer protocol domains must use if_delmulti_ifma().
3302 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3304 struct ifmultiaddr *ifma;
3309 IFNET_RLOCK_NOSLEEP();
3310 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3315 IFNET_RUNLOCK_NOSLEEP();
3317 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3324 ifma = if_findmulti(ifp, sa);
3326 lastref = if_delmulti_locked(ifp, ifma, 0);
3327 IF_ADDR_WUNLOCK(ifp);
3332 if (lastref && ifp->if_ioctl != NULL) {
3333 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3340 * Delete all multicast group membership for an interface.
3341 * Should be used to quickly flush all multicast filters.
3344 if_delallmulti(struct ifnet *ifp)
3346 struct ifmultiaddr *ifma;
3347 struct ifmultiaddr *next;
3350 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3351 if_delmulti_locked(ifp, ifma, 0);
3352 IF_ADDR_WUNLOCK(ifp);
3356 * Delete a multicast group membership by group membership pointer.
3357 * Network-layer protocol domains must use this routine.
3359 * It is safe to call this routine if the ifp disappeared.
3362 if_delmulti_ifma(struct ifmultiaddr *ifma)
3367 ifp = ifma->ifma_ifp;
3370 printf("%s: ifma_ifp seems to be detached\n", __func__);
3374 IFNET_RLOCK_NOSLEEP();
3375 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3379 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3382 IFNET_RUNLOCK_NOSLEEP();
3386 * If and only if the ifnet instance exists: Acquire the address lock.
3391 lastref = if_delmulti_locked(ifp, ifma, 0);
3395 * If and only if the ifnet instance exists:
3396 * Release the address lock.
3397 * If the group was left: update the hardware hash filter.
3399 IF_ADDR_WUNLOCK(ifp);
3400 if (lastref && ifp->if_ioctl != NULL) {
3401 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3407 * Perform deletion of network-layer and/or link-layer multicast address.
3409 * Return 0 if the reference count was decremented.
3410 * Return 1 if the final reference was released, indicating that the
3411 * hardware hash filter should be reprogrammed.
3414 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3416 struct ifmultiaddr *ll_ifma;
3418 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3419 KASSERT(ifma->ifma_ifp == ifp,
3420 ("%s: inconsistent ifp %p", __func__, ifp));
3421 IF_ADDR_WLOCK_ASSERT(ifp);
3424 ifp = ifma->ifma_ifp;
3427 * If the ifnet is detaching, null out references to ifnet,
3428 * so that upper protocol layers will notice, and not attempt
3429 * to obtain locks for an ifnet which no longer exists. The
3430 * routing socket announcement must happen before the ifnet
3431 * instance is detached from the system.
3435 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3438 * ifp may already be nulled out if we are being reentered
3439 * to delete the ll_ifma.
3442 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3443 ifma->ifma_ifp = NULL;
3447 if (--ifma->ifma_refcount > 0)
3451 * If this ifma is a network-layer ifma, a link-layer ifma may
3452 * have been associated with it. Release it first if so.
3454 ll_ifma = ifma->ifma_llifma;
3455 if (ll_ifma != NULL) {
3456 KASSERT(ifma->ifma_lladdr != NULL,
3457 ("%s: llifma w/o lladdr", __func__));
3459 ll_ifma->ifma_ifp = NULL; /* XXX */
3460 if (--ll_ifma->ifma_refcount == 0) {
3462 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3465 if_freemulti(ll_ifma);
3470 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3475 * The last reference to this instance of struct ifmultiaddr
3476 * was released; the hardware should be notified of this change.
3482 * Set the link layer address on an interface.
3484 * At this time we only support certain types of interfaces,
3485 * and we don't allow the length of the address to change.
3488 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3490 struct sockaddr_dl *sdl;
3497 IF_ADDR_RUNLOCK(ifp);
3501 IF_ADDR_RUNLOCK(ifp);
3502 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3507 if (len != sdl->sdl_alen) { /* don't allow length to change */
3511 switch (ifp->if_type) {
3519 case IFT_IEEE8023ADLAG:
3521 bcopy(lladdr, LLADDR(sdl), len);
3530 * If the interface is already up, we need
3531 * to re-init it in order to reprogram its
3534 if ((ifp->if_flags & IFF_UP) != 0) {
3535 if (ifp->if_ioctl) {
3536 ifp->if_flags &= ~IFF_UP;
3537 ifr.ifr_flags = ifp->if_flags & 0xffff;
3538 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3539 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3540 ifp->if_flags |= IFF_UP;
3541 ifr.ifr_flags = ifp->if_flags & 0xffff;
3542 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3543 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3547 * Also send gratuitous ARPs to notify other nodes about
3548 * the address change.
3550 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3551 if (ifa->ifa_addr->sa_family == AF_INET)
3552 arp_ifinit(ifp, ifa);
3560 * The name argument must be a pointer to storage which will last as
3561 * long as the interface does. For physical devices, the result of
3562 * device_get_name(dev) is a good choice and for pseudo-devices a
3563 * static string works well.
3566 if_initname(struct ifnet *ifp, const char *name, int unit)
3568 ifp->if_dname = name;
3569 ifp->if_dunit = unit;
3570 if (unit != IF_DUNIT_NONE)
3571 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3573 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3577 if_printf(struct ifnet *ifp, const char * fmt, ...)
3582 retval = printf("%s: ", ifp->if_xname);
3584 retval += vprintf(fmt, ap);
3590 if_start(struct ifnet *ifp)
3593 (*(ifp)->if_start)(ifp);
3597 * Backwards compatibility interface for drivers
3598 * that have not implemented it
3601 if_transmit(struct ifnet *ifp, struct mbuf *m)
3605 IFQ_HANDOFF(ifp, m, error);
3610 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3617 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3622 if (_IF_QFULL(ifq)) {
3629 ifp->if_obytes += m->m_pkthdr.len + adjust;
3630 if (m->m_flags & (M_BCAST|M_MCAST))
3632 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3634 _IF_ENQUEUE(ifq, m);
3636 if (ifp != NULL && !active)
3637 (*(ifp)->if_start)(ifp);
3642 if_register_com_alloc(u_char type,
3643 if_com_alloc_t *a, if_com_free_t *f)
3646 KASSERT(if_com_alloc[type] == NULL,
3647 ("if_register_com_alloc: %d already registered", type));
3648 KASSERT(if_com_free[type] == NULL,
3649 ("if_register_com_alloc: %d free already registered", type));
3651 if_com_alloc[type] = a;
3652 if_com_free[type] = f;
3656 if_deregister_com_alloc(u_char type)
3659 KASSERT(if_com_alloc[type] != NULL,
3660 ("if_deregister_com_alloc: %d not registered", type));
3661 KASSERT(if_com_free[type] != NULL,
3662 ("if_deregister_com_alloc: %d free not registered", type));
3663 if_com_alloc[type] = NULL;
3664 if_com_free[type] = NULL;