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 void 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 panic("%s: ifp=%p not on the ifnet tailq %p",
922 __func__, ifp, &V_ifnet);
924 return; /* XXX this should panic as well? */
927 /* Check if this is a cloned interface or not. */
928 if (vmove && ifcp != NULL)
929 *ifcp = if_clone_findifc(ifp);
932 * Remove/wait for pending events.
934 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
937 * Remove routes and flush queues.
941 if (ALTQ_IS_ENABLED(&ifp->if_snd))
942 altq_disable(&ifp->if_snd);
943 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
944 altq_detach(&ifp->if_snd);
955 * Remove all IPv6 kernel structs related to ifp. This should be done
956 * before removing routing entries below, since IPv6 interface direct
957 * routes are expected to be removed by the IPv6-specific kernel API.
958 * Otherwise, the kernel will detect some inconsistency and bark it.
966 * Prevent further calls into the device driver via ifnet.
971 * Remove link ifaddr pointer and maybe decrement if_index.
972 * Clean up all addresses.
976 /* We can now free link ifaddr. */
977 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
978 ifa = TAILQ_FIRST(&ifp->if_addrhead);
979 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
985 * Delete all remaining routes using this interface
986 * Unfortuneatly the only way to do this is to slog through
987 * the entire routing table looking for routes which point
988 * to this interface...oh well...
990 for (i = 1; i <= AF_MAX; i++) {
991 for (j = 0; j < rt_numfibs; j++) {
992 rnh = rt_tables_get_rnh(j, i);
995 RADIX_NODE_HEAD_LOCK(rnh);
996 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
997 RADIX_NODE_HEAD_UNLOCK(rnh);
1001 /* Announce that the interface is gone. */
1002 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1003 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1004 if (IS_DEFAULT_VNET(curvnet))
1005 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1009 * We cannot hold the lock over dom_ifdetach calls as they might
1010 * sleep, for example trying to drain a callout, thus open up the
1011 * theoretical race with re-attaching.
1013 IF_AFDATA_LOCK(ifp);
1014 i = ifp->if_afdata_initialized;
1015 ifp->if_afdata_initialized = 0;
1016 IF_AFDATA_UNLOCK(ifp);
1017 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1018 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1019 (*dp->dom_ifdetach)(ifp,
1020 ifp->if_afdata[dp->dom_family]);
1026 * if_vmove() performs a limited version of if_detach() in current
1027 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1028 * An attempt is made to shrink if_index in current vnet, find an
1029 * unused if_index in target vnet and calls if_grow() if necessary,
1030 * and finally find an unused if_xname for the target vnet.
1033 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1036 struct if_clone *ifc;
1039 * Detach from current vnet, but preserve LLADDR info, do not
1040 * mark as dead etc. so that the ifnet can be reattached later.
1042 if_detach_internal(ifp, 1, &ifc);
1045 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1046 * the if_index for that vnet if possible.
1048 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1049 * or we'd lock on one vnet and unlock on another.
1052 ifindex_free_locked(ifp->if_index);
1056 * Perform interface-specific reassignment tasks, if provided by
1059 if (ifp->if_reassign != NULL)
1060 ifp->if_reassign(ifp, new_vnet, NULL);
1063 * Switch to the context of the target vnet.
1065 CURVNET_SET_QUIET(new_vnet);
1068 if (ifindex_alloc_locked(&idx) != 0) {
1070 panic("if_index overflow");
1072 ifp->if_index = idx;
1073 ifnet_setbyindex_locked(ifp->if_index, ifp);
1076 if_attach_internal(ifp, 1, ifc);
1082 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1085 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1090 /* Try to find the prison within our visibility. */
1091 sx_slock(&allprison_lock);
1092 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1093 sx_sunlock(&allprison_lock);
1096 prison_hold_locked(pr);
1097 mtx_unlock(&pr->pr_mtx);
1099 /* Do not try to move the iface from and to the same prison. */
1100 if (pr->pr_vnet == ifp->if_vnet) {
1105 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1106 /* XXX Lock interfaces to avoid races. */
1107 CURVNET_SET_QUIET(pr->pr_vnet);
1108 difp = ifunit(ifname);
1115 /* Move the interface into the child jail/vnet. */
1116 if_vmove(ifp, pr->pr_vnet);
1118 /* Report the new if_xname back to the userland. */
1119 sprintf(ifname, "%s", ifp->if_xname);
1126 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1129 struct vnet *vnet_dst;
1132 /* Try to find the prison within our visibility. */
1133 sx_slock(&allprison_lock);
1134 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1135 sx_sunlock(&allprison_lock);
1138 prison_hold_locked(pr);
1139 mtx_unlock(&pr->pr_mtx);
1141 /* Make sure the named iface exists in the source prison/vnet. */
1142 CURVNET_SET(pr->pr_vnet);
1143 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1150 /* Do not try to move the iface from and to the same prison. */
1151 vnet_dst = TD_TO_VNET(td);
1152 if (vnet_dst == ifp->if_vnet) {
1158 /* Get interface back from child jail/vnet. */
1159 if_vmove(ifp, vnet_dst);
1162 /* Report the new if_xname back to the userland. */
1163 sprintf(ifname, "%s", ifp->if_xname);
1171 * Add a group to an interface
1174 if_addgroup(struct ifnet *ifp, const char *groupname)
1176 struct ifg_list *ifgl;
1177 struct ifg_group *ifg = NULL;
1178 struct ifg_member *ifgm;
1181 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1182 groupname[strlen(groupname) - 1] <= '9')
1186 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1187 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1192 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1193 M_NOWAIT)) == NULL) {
1198 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1199 M_TEMP, M_NOWAIT)) == NULL) {
1205 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1206 if (!strcmp(ifg->ifg_group, groupname))
1210 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1211 M_TEMP, M_NOWAIT)) == NULL) {
1217 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1218 ifg->ifg_refcnt = 0;
1219 TAILQ_INIT(&ifg->ifg_members);
1220 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1225 ifgl->ifgl_group = ifg;
1226 ifgm->ifgm_ifp = ifp;
1229 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1230 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1231 IF_ADDR_WUNLOCK(ifp);
1236 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1237 EVENTHANDLER_INVOKE(group_change_event, groupname);
1243 * Remove a group from an interface
1246 if_delgroup(struct ifnet *ifp, const char *groupname)
1248 struct ifg_list *ifgl;
1249 struct ifg_member *ifgm;
1252 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1253 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1261 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1262 IF_ADDR_WUNLOCK(ifp);
1264 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1265 if (ifgm->ifgm_ifp == ifp)
1269 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1273 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1274 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1276 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1277 free(ifgl->ifgl_group, M_TEMP);
1283 EVENTHANDLER_INVOKE(group_change_event, groupname);
1289 * Remove an interface from all groups
1292 if_delgroups(struct ifnet *ifp)
1294 struct ifg_list *ifgl;
1295 struct ifg_member *ifgm;
1296 char groupname[IFNAMSIZ];
1299 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1300 ifgl = TAILQ_FIRST(&ifp->if_groups);
1302 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1305 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1306 IF_ADDR_WUNLOCK(ifp);
1308 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1309 if (ifgm->ifgm_ifp == ifp)
1313 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1318 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1319 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1321 EVENTHANDLER_INVOKE(group_detach_event,
1323 free(ifgl->ifgl_group, M_TEMP);
1329 EVENTHANDLER_INVOKE(group_change_event, groupname);
1337 * Stores all groups from an interface in memory pointed
1341 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1344 struct ifg_list *ifgl;
1345 struct ifg_req ifgrq, *ifgp;
1346 struct ifgroupreq *ifgr = data;
1348 if (ifgr->ifgr_len == 0) {
1350 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1351 ifgr->ifgr_len += sizeof(struct ifg_req);
1352 IF_ADDR_RUNLOCK(ifp);
1356 len = ifgr->ifgr_len;
1357 ifgp = ifgr->ifgr_groups;
1360 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1361 if (len < sizeof(ifgrq)) {
1362 IF_ADDR_RUNLOCK(ifp);
1365 bzero(&ifgrq, sizeof ifgrq);
1366 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1367 sizeof(ifgrq.ifgrq_group));
1368 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1369 IF_ADDR_RUNLOCK(ifp);
1372 len -= sizeof(ifgrq);
1375 IF_ADDR_RUNLOCK(ifp);
1381 * Stores all members of a group in memory pointed to by data
1384 if_getgroupmembers(struct ifgroupreq *data)
1386 struct ifgroupreq *ifgr = data;
1387 struct ifg_group *ifg;
1388 struct ifg_member *ifgm;
1389 struct ifg_req ifgrq, *ifgp;
1393 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1394 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1401 if (ifgr->ifgr_len == 0) {
1402 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1403 ifgr->ifgr_len += sizeof(ifgrq);
1408 len = ifgr->ifgr_len;
1409 ifgp = ifgr->ifgr_groups;
1410 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1411 if (len < sizeof(ifgrq)) {
1415 bzero(&ifgrq, sizeof ifgrq);
1416 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1417 sizeof(ifgrq.ifgrq_member));
1418 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1422 len -= sizeof(ifgrq);
1431 * Delete Routes for a Network Interface
1433 * Called for each routing entry via the rnh->rnh_walktree() call above
1434 * to delete all route entries referencing a detaching network interface.
1437 * rn pointer to node in the routing table
1438 * arg argument passed to rnh->rnh_walktree() - detaching interface
1442 * errno failed - reason indicated
1446 if_rtdel(struct radix_node *rn, void *arg)
1448 struct rtentry *rt = (struct rtentry *)rn;
1449 struct ifnet *ifp = arg;
1452 if (rt->rt_ifp == ifp) {
1455 * Protect (sorta) against walktree recursion problems
1456 * with cloned routes
1458 if ((rt->rt_flags & RTF_UP) == 0)
1461 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1463 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED,
1464 (struct rtentry **) NULL, rt->rt_fibnum);
1466 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1474 * A compatibility function returns ifnet counter values.
1477 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1480 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1482 case IFCOUNTER_IPACKETS:
1483 return (ifp->if_ipackets);
1484 case IFCOUNTER_IERRORS:
1485 return (ifp->if_ierrors);
1486 case IFCOUNTER_OPACKETS:
1487 return (ifp->if_opackets);
1488 case IFCOUNTER_OERRORS:
1489 return (ifp->if_oerrors);
1490 case IFCOUNTER_COLLISIONS:
1491 return (ifp->if_collisions);
1492 case IFCOUNTER_IBYTES:
1493 return (ifp->if_ibytes);
1494 case IFCOUNTER_OBYTES:
1495 return (ifp->if_obytes);
1496 case IFCOUNTER_IMCASTS:
1497 return (ifp->if_imcasts);
1498 case IFCOUNTER_OMCASTS:
1499 return (ifp->if_omcasts);
1500 case IFCOUNTER_IQDROPS:
1501 return (ifp->if_iqdrops);
1503 case IFCOUNTER_OQDROPS:
1504 return (ifp->if_oqdrops);
1506 case IFCOUNTER_NOPROTO:
1507 return (ifp->if_noproto);
1515 * Increase an ifnet counter. Usually used for counters shared
1516 * between the stack and a driver, but function supports them all.
1519 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1522 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1524 case IFCOUNTER_IPACKETS:
1525 ifp->if_ipackets += inc;
1527 case IFCOUNTER_IERRORS:
1528 ifp->if_ierrors += inc;
1530 case IFCOUNTER_OPACKETS:
1531 ifp->if_opackets += inc;
1533 case IFCOUNTER_OERRORS:
1534 ifp->if_oerrors += inc;
1536 case IFCOUNTER_COLLISIONS:
1537 ifp->if_collisions += inc;
1539 case IFCOUNTER_IBYTES:
1540 ifp->if_ibytes += inc;
1542 case IFCOUNTER_OBYTES:
1543 ifp->if_obytes += inc;
1545 case IFCOUNTER_IMCASTS:
1546 ifp->if_imcasts += inc;
1548 case IFCOUNTER_OMCASTS:
1549 ifp->if_omcasts += inc;
1551 case IFCOUNTER_IQDROPS:
1552 ifp->if_iqdrops += inc;
1555 case IFCOUNTER_OQDROPS:
1556 ifp->if_oqdrops += inc;
1559 case IFCOUNTER_NOPROTO:
1560 ifp->if_noproto += inc;
1568 * Wrapper functions for struct ifnet address list locking macros. These are
1569 * used by kernel modules to avoid encoding programming interface or binary
1570 * interface assumptions that may be violated when kernel-internal locking
1571 * approaches change.
1574 if_addr_rlock(struct ifnet *ifp)
1581 if_addr_runlock(struct ifnet *ifp)
1584 IF_ADDR_RUNLOCK(ifp);
1588 if_maddr_rlock(struct ifnet *ifp)
1595 if_maddr_runlock(struct ifnet *ifp)
1598 IF_ADDR_RUNLOCK(ifp);
1602 * Initialization, destruction and refcounting functions for ifaddrs.
1605 ifa_init(struct ifaddr *ifa)
1608 mtx_init(&ifa->ifa_mtx, "ifaddr", NULL, MTX_DEF);
1609 refcount_init(&ifa->ifa_refcnt, 1);
1610 ifa->if_data.ifi_datalen = sizeof(ifa->if_data);
1614 ifa_ref(struct ifaddr *ifa)
1617 refcount_acquire(&ifa->ifa_refcnt);
1621 ifa_free(struct ifaddr *ifa)
1624 if (refcount_release(&ifa->ifa_refcnt)) {
1625 mtx_destroy(&ifa->ifa_mtx);
1626 free(ifa, M_IFADDR);
1631 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1634 struct rtentry *rt = NULL;
1635 struct rt_addrinfo info;
1636 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
1638 bzero(&info, sizeof(info));
1639 info.rti_ifp = V_loif;
1640 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1641 info.rti_info[RTAX_DST] = ia;
1642 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1643 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib);
1645 if (error == 0 && rt != NULL) {
1647 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1648 ifa->ifa_ifp->if_type;
1649 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1650 ifa->ifa_ifp->if_index;
1653 } else if (error != 0)
1654 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error);
1660 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1663 struct rt_addrinfo info;
1664 struct sockaddr_dl null_sdl;
1666 bzero(&null_sdl, sizeof(null_sdl));
1667 null_sdl.sdl_len = sizeof(null_sdl);
1668 null_sdl.sdl_family = AF_LINK;
1669 null_sdl.sdl_type = ifa->ifa_ifp->if_type;
1670 null_sdl.sdl_index = ifa->ifa_ifp->if_index;
1671 bzero(&info, sizeof(info));
1672 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1673 info.rti_info[RTAX_DST] = ia;
1674 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1675 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib);
1678 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error);
1684 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1685 * structs used to represent other address families, it is necessary
1686 * to perform a different comparison.
1689 #define sa_equal(a1, a2) \
1690 (bcmp((a1), (a2), ((a1))->sa_len) == 0)
1692 #define sa_dl_equal(a1, a2) \
1693 ((((struct sockaddr_dl *)(a1))->sdl_len == \
1694 ((struct sockaddr_dl *)(a2))->sdl_len) && \
1695 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
1696 LLADDR((struct sockaddr_dl *)(a2)), \
1697 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1700 * Locate an interface based on a complete address.
1703 static struct ifaddr *
1704 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref)
1709 IFNET_RLOCK_NOSLEEP();
1710 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1712 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1713 if (ifa->ifa_addr->sa_family != addr->sa_family)
1715 if (sa_equal(addr, ifa->ifa_addr)) {
1718 IF_ADDR_RUNLOCK(ifp);
1721 /* IP6 doesn't have broadcast */
1722 if ((ifp->if_flags & IFF_BROADCAST) &&
1723 ifa->ifa_broadaddr &&
1724 ifa->ifa_broadaddr->sa_len != 0 &&
1725 sa_equal(ifa->ifa_broadaddr, addr)) {
1728 IF_ADDR_RUNLOCK(ifp);
1732 IF_ADDR_RUNLOCK(ifp);
1736 IFNET_RUNLOCK_NOSLEEP();
1741 ifa_ifwithaddr(struct sockaddr *addr)
1744 return (ifa_ifwithaddr_internal(addr, 1));
1748 ifa_ifwithaddr_check(struct sockaddr *addr)
1751 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1755 * Locate an interface based on the broadcast address.
1759 ifa_ifwithbroadaddr(struct sockaddr *addr)
1764 IFNET_RLOCK_NOSLEEP();
1765 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1767 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1768 if (ifa->ifa_addr->sa_family != addr->sa_family)
1770 if ((ifp->if_flags & IFF_BROADCAST) &&
1771 ifa->ifa_broadaddr &&
1772 ifa->ifa_broadaddr->sa_len != 0 &&
1773 sa_equal(ifa->ifa_broadaddr, addr)) {
1775 IF_ADDR_RUNLOCK(ifp);
1779 IF_ADDR_RUNLOCK(ifp);
1783 IFNET_RUNLOCK_NOSLEEP();
1788 * Locate the point to point interface with a given destination address.
1792 ifa_ifwithdstaddr_fib(struct sockaddr *addr, int fibnum)
1797 IFNET_RLOCK_NOSLEEP();
1798 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1799 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1801 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1804 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1805 if (ifa->ifa_addr->sa_family != addr->sa_family)
1807 if (ifa->ifa_dstaddr != NULL &&
1808 sa_equal(addr, ifa->ifa_dstaddr)) {
1810 IF_ADDR_RUNLOCK(ifp);
1814 IF_ADDR_RUNLOCK(ifp);
1818 IFNET_RUNLOCK_NOSLEEP();
1823 ifa_ifwithdstaddr(struct sockaddr *addr)
1826 return (ifa_ifwithdstaddr_fib(addr, RT_ALL_FIBS));
1830 * Find an interface on a specific network. If many, choice
1831 * is most specific found.
1834 ifa_ifwithnet_fib(struct sockaddr *addr, int ignore_ptp, int fibnum)
1838 struct ifaddr *ifa_maybe = NULL;
1839 u_int af = addr->sa_family;
1840 char *addr_data = addr->sa_data, *cplim;
1843 * AF_LINK addresses can be looked up directly by their index number,
1844 * so do that if we can.
1846 if (af == AF_LINK) {
1847 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1848 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1849 return (ifaddr_byindex(sdl->sdl_index));
1853 * Scan though each interface, looking for ones that have addresses
1854 * in this address family and the requested fib. Maintain a reference
1855 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1856 * kept it stable when we move onto the next interface.
1858 IFNET_RLOCK_NOSLEEP();
1859 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1860 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1863 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1864 char *cp, *cp2, *cp3;
1866 if (ifa->ifa_addr->sa_family != af)
1868 if (af == AF_INET &&
1869 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1871 * This is a bit broken as it doesn't
1872 * take into account that the remote end may
1873 * be a single node in the network we are
1875 * The trouble is that we don't know the
1876 * netmask for the remote end.
1878 if (ifa->ifa_dstaddr != NULL &&
1879 sa_equal(addr, ifa->ifa_dstaddr)) {
1881 IF_ADDR_RUNLOCK(ifp);
1886 * if we have a special address handler,
1887 * then use it instead of the generic one.
1889 if (ifa->ifa_claim_addr) {
1890 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
1892 IF_ADDR_RUNLOCK(ifp);
1899 * Scan all the bits in the ifa's address.
1900 * If a bit dissagrees with what we are
1901 * looking for, mask it with the netmask
1902 * to see if it really matters.
1903 * (A byte at a time)
1905 if (ifa->ifa_netmask == 0)
1908 cp2 = ifa->ifa_addr->sa_data;
1909 cp3 = ifa->ifa_netmask->sa_data;
1910 cplim = ifa->ifa_netmask->sa_len
1911 + (char *)ifa->ifa_netmask;
1913 if ((*cp++ ^ *cp2++) & *cp3++)
1914 goto next; /* next address! */
1916 * If the netmask of what we just found
1917 * is more specific than what we had before
1918 * (if we had one), or if the virtual status
1919 * of new prefix is better than of the old one,
1920 * then remember the new one before continuing
1921 * to search for an even better one.
1923 if (ifa_maybe == NULL ||
1924 ifa_preferred(ifa_maybe, ifa) ||
1925 rn_refines((caddr_t)ifa->ifa_netmask,
1926 (caddr_t)ifa_maybe->ifa_netmask)) {
1927 if (ifa_maybe != NULL)
1928 ifa_free(ifa_maybe);
1934 IF_ADDR_RUNLOCK(ifp);
1939 IFNET_RUNLOCK_NOSLEEP();
1940 if (ifa_maybe != NULL)
1941 ifa_free(ifa_maybe);
1946 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp)
1949 return (ifa_ifwithnet_fib(addr, ignore_ptp, RT_ALL_FIBS));
1953 * Find an interface address specific to an interface best matching
1957 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1960 char *cp, *cp2, *cp3;
1962 struct ifaddr *ifa_maybe = NULL;
1963 u_int af = addr->sa_family;
1968 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1969 if (ifa->ifa_addr->sa_family != af)
1971 if (ifa_maybe == NULL)
1973 if (ifa->ifa_netmask == 0) {
1974 if (sa_equal(addr, ifa->ifa_addr) ||
1975 (ifa->ifa_dstaddr &&
1976 sa_equal(addr, ifa->ifa_dstaddr)))
1980 if (ifp->if_flags & IFF_POINTOPOINT) {
1981 if (sa_equal(addr, ifa->ifa_dstaddr))
1985 cp2 = ifa->ifa_addr->sa_data;
1986 cp3 = ifa->ifa_netmask->sa_data;
1987 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1988 for (; cp3 < cplim; cp3++)
1989 if ((*cp++ ^ *cp2++) & *cp3)
1999 IF_ADDR_RUNLOCK(ifp);
2004 * See whether new ifa is better than current one:
2005 * 1) A non-virtual one is preferred over virtual.
2006 * 2) A virtual in master state preferred over any other state.
2008 * Used in several address selecting functions.
2011 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2014 return (cur->ifa_carp && (!next->ifa_carp ||
2015 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2018 #include <net/if_llatbl.h>
2021 * Default action when installing a route with a Link Level gateway.
2022 * Lookup an appropriate real ifa to point to.
2023 * This should be moved to /sys/net/link.c eventually.
2026 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2028 struct ifaddr *ifa, *oifa;
2029 struct sockaddr *dst;
2034 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
2035 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
2037 ifa = ifaof_ifpforaddr(dst, ifp);
2042 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2043 ifa->ifa_rtrequest(cmd, rt, info);
2048 * Mark an interface down and notify protocols of
2052 if_unroute(struct ifnet *ifp, int flag, int fam)
2056 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2058 ifp->if_flags &= ~flag;
2059 getmicrotime(&ifp->if_lastchange);
2060 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2061 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2062 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2063 ifp->if_qflush(ifp);
2066 (*carp_linkstate_p)(ifp);
2071 * Mark an interface up and notify protocols of
2075 if_route(struct ifnet *ifp, int flag, int fam)
2079 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2081 ifp->if_flags |= flag;
2082 getmicrotime(&ifp->if_lastchange);
2083 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2084 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2085 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2087 (*carp_linkstate_p)(ifp);
2094 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2095 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2096 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2097 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2098 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2099 int (*vlan_setcookie_p)(struct ifnet *, void *);
2100 void *(*vlan_cookie_p)(struct ifnet *);
2103 * Handle a change in the interface link state. To avoid LORs
2104 * between driver lock and upper layer locks, as well as possible
2105 * recursions, we post event to taskqueue, and all job
2106 * is done in static do_link_state_change().
2109 if_link_state_change(struct ifnet *ifp, int link_state)
2111 /* Return if state hasn't changed. */
2112 if (ifp->if_link_state == link_state)
2115 ifp->if_link_state = link_state;
2117 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2121 do_link_state_change(void *arg, int pending)
2123 struct ifnet *ifp = (struct ifnet *)arg;
2124 int link_state = ifp->if_link_state;
2125 CURVNET_SET(ifp->if_vnet);
2127 /* Notify that the link state has changed. */
2129 if (ifp->if_vlantrunk != NULL)
2130 (*vlan_link_state_p)(ifp);
2132 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2133 IFP2AC(ifp)->ac_netgraph != NULL)
2134 (*ng_ether_link_state_p)(ifp, link_state);
2136 (*carp_linkstate_p)(ifp);
2138 (*bridge_linkstate_p)(ifp);
2140 (*lagg_linkstate_p)(ifp, link_state);
2142 if (IS_DEFAULT_VNET(curvnet))
2143 devctl_notify("IFNET", ifp->if_xname,
2144 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2147 if_printf(ifp, "%d link states coalesced\n", pending);
2148 if (log_link_state_change)
2149 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2150 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2151 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2156 * Mark an interface down and notify protocols of
2160 if_down(struct ifnet *ifp)
2163 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2167 * Mark an interface up and notify protocols of
2171 if_up(struct ifnet *ifp)
2174 if_route(ifp, IFF_UP, AF_UNSPEC);
2178 * Flush an interface queue.
2181 if_qflush(struct ifnet *ifp)
2189 if (ALTQ_IS_ENABLED(ifq))
2193 while ((m = n) != 0) {
2204 * Map interface name to interface structure pointer, with or without
2205 * returning a reference.
2208 ifunit_ref(const char *name)
2212 IFNET_RLOCK_NOSLEEP();
2213 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2214 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2215 !(ifp->if_flags & IFF_DYING))
2220 IFNET_RUNLOCK_NOSLEEP();
2225 ifunit(const char *name)
2229 IFNET_RLOCK_NOSLEEP();
2230 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2231 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2234 IFNET_RUNLOCK_NOSLEEP();
2239 * Hardware specific interface ioctls.
2242 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2247 int new_flags, temp_flags;
2248 size_t namelen, onamelen;
2250 char *descrbuf, *odescrbuf;
2251 char new_name[IFNAMSIZ];
2253 struct sockaddr_dl *sdl;
2255 ifr = (struct ifreq *)data;
2258 ifr->ifr_index = ifp->if_index;
2262 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2263 ifr->ifr_flags = temp_flags & 0xffff;
2264 ifr->ifr_flagshigh = temp_flags >> 16;
2268 ifr->ifr_reqcap = ifp->if_capabilities;
2269 ifr->ifr_curcap = ifp->if_capenable;
2274 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2279 ifr->ifr_metric = ifp->if_metric;
2283 ifr->ifr_mtu = ifp->if_mtu;
2287 ifr->ifr_phys = ifp->if_physical;
2292 sx_slock(&ifdescr_sx);
2293 if (ifp->if_description == NULL)
2296 /* space for terminating nul */
2297 descrlen = strlen(ifp->if_description) + 1;
2298 if (ifr->ifr_buffer.length < descrlen)
2299 ifr->ifr_buffer.buffer = NULL;
2301 error = copyout(ifp->if_description,
2302 ifr->ifr_buffer.buffer, descrlen);
2303 ifr->ifr_buffer.length = descrlen;
2305 sx_sunlock(&ifdescr_sx);
2309 error = priv_check(td, PRIV_NET_SETIFDESCR);
2314 * Copy only (length-1) bytes to make sure that
2315 * if_description is always nul terminated. The
2316 * length parameter is supposed to count the
2317 * terminating nul in.
2319 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2320 return (ENAMETOOLONG);
2321 else if (ifr->ifr_buffer.length == 0)
2324 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2326 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2327 ifr->ifr_buffer.length - 1);
2329 free(descrbuf, M_IFDESCR);
2334 sx_xlock(&ifdescr_sx);
2335 odescrbuf = ifp->if_description;
2336 ifp->if_description = descrbuf;
2337 sx_xunlock(&ifdescr_sx);
2339 getmicrotime(&ifp->if_lastchange);
2340 free(odescrbuf, M_IFDESCR);
2344 ifr->ifr_fib = ifp->if_fib;
2348 error = priv_check(td, PRIV_NET_SETIFFIB);
2351 if (ifr->ifr_fib >= rt_numfibs)
2354 ifp->if_fib = ifr->ifr_fib;
2358 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2362 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2363 * check, so we don't need special handling here yet.
2365 new_flags = (ifr->ifr_flags & 0xffff) |
2366 (ifr->ifr_flagshigh << 16);
2367 if (ifp->if_flags & IFF_SMART) {
2368 /* Smart drivers twiddle their own routes */
2369 } else if (ifp->if_flags & IFF_UP &&
2370 (new_flags & IFF_UP) == 0) {
2372 } else if (new_flags & IFF_UP &&
2373 (ifp->if_flags & IFF_UP) == 0) {
2376 /* See if permanently promiscuous mode bit is about to flip */
2377 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2378 if (new_flags & IFF_PPROMISC)
2379 ifp->if_flags |= IFF_PROMISC;
2380 else if (ifp->if_pcount == 0)
2381 ifp->if_flags &= ~IFF_PROMISC;
2382 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2384 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
2386 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2387 (new_flags &~ IFF_CANTCHANGE);
2388 if (ifp->if_ioctl) {
2389 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2391 getmicrotime(&ifp->if_lastchange);
2395 error = priv_check(td, PRIV_NET_SETIFCAP);
2398 if (ifp->if_ioctl == NULL)
2399 return (EOPNOTSUPP);
2400 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2402 error = (*ifp->if_ioctl)(ifp, cmd, data);
2404 getmicrotime(&ifp->if_lastchange);
2409 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2414 error = priv_check(td, PRIV_NET_SETIFNAME);
2417 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2420 if (new_name[0] == '\0')
2422 if (ifunit(new_name) != NULL)
2426 * XXX: Locking. Nothing else seems to lock if_flags,
2427 * and there are numerous other races with the
2428 * ifunit() checks not being atomic with namespace
2429 * changes (renames, vmoves, if_attach, etc).
2431 ifp->if_flags |= IFF_RENAMING;
2433 /* Announce the departure of the interface. */
2434 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2435 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2437 log(LOG_INFO, "%s: changing name to '%s'\n",
2438 ifp->if_xname, new_name);
2440 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2443 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2444 namelen = strlen(new_name);
2445 onamelen = sdl->sdl_nlen;
2447 * Move the address if needed. This is safe because we
2448 * allocate space for a name of length IFNAMSIZ when we
2449 * create this in if_attach().
2451 if (namelen != onamelen) {
2452 bcopy(sdl->sdl_data + onamelen,
2453 sdl->sdl_data + namelen, sdl->sdl_alen);
2455 bcopy(new_name, sdl->sdl_data, namelen);
2456 sdl->sdl_nlen = namelen;
2457 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2458 bzero(sdl->sdl_data, onamelen);
2459 while (namelen != 0)
2460 sdl->sdl_data[--namelen] = 0xff;
2463 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2464 /* Announce the return of the interface. */
2465 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2467 ifp->if_flags &= ~IFF_RENAMING;
2472 error = priv_check(td, PRIV_NET_SETIFVNET);
2475 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2480 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2483 ifp->if_metric = ifr->ifr_metric;
2484 getmicrotime(&ifp->if_lastchange);
2488 error = priv_check(td, PRIV_NET_SETIFPHYS);
2491 if (ifp->if_ioctl == NULL)
2492 return (EOPNOTSUPP);
2493 error = (*ifp->if_ioctl)(ifp, cmd, data);
2495 getmicrotime(&ifp->if_lastchange);
2500 u_long oldmtu = ifp->if_mtu;
2502 error = priv_check(td, PRIV_NET_SETIFMTU);
2505 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2507 if (ifp->if_ioctl == NULL)
2508 return (EOPNOTSUPP);
2509 error = (*ifp->if_ioctl)(ifp, cmd, data);
2511 getmicrotime(&ifp->if_lastchange);
2515 * If the link MTU changed, do network layer specific procedure.
2517 if (ifp->if_mtu != oldmtu) {
2527 if (cmd == SIOCADDMULTI)
2528 error = priv_check(td, PRIV_NET_ADDMULTI);
2530 error = priv_check(td, PRIV_NET_DELMULTI);
2534 /* Don't allow group membership on non-multicast interfaces. */
2535 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2536 return (EOPNOTSUPP);
2538 /* Don't let users screw up protocols' entries. */
2539 if (ifr->ifr_addr.sa_family != AF_LINK)
2542 if (cmd == SIOCADDMULTI) {
2543 struct ifmultiaddr *ifma;
2546 * Userland is only permitted to join groups once
2547 * via the if_addmulti() KPI, because it cannot hold
2548 * struct ifmultiaddr * between calls. It may also
2549 * lose a race while we check if the membership
2553 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2554 IF_ADDR_RUNLOCK(ifp);
2558 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2560 error = if_delmulti(ifp, &ifr->ifr_addr);
2563 getmicrotime(&ifp->if_lastchange);
2566 case SIOCSIFPHYADDR:
2567 case SIOCDIFPHYADDR:
2569 case SIOCSIFPHYADDR_IN6:
2571 case SIOCSLIFPHYADDR:
2573 case SIOCSIFGENERIC:
2574 error = priv_check(td, PRIV_NET_HWIOCTL);
2577 if (ifp->if_ioctl == NULL)
2578 return (EOPNOTSUPP);
2579 error = (*ifp->if_ioctl)(ifp, cmd, data);
2581 getmicrotime(&ifp->if_lastchange);
2585 ifs = (struct ifstat *)data;
2586 ifs->ascii[0] = '\0';
2588 case SIOCGIFPSRCADDR:
2589 case SIOCGIFPDSTADDR:
2590 case SIOCGLIFPHYADDR:
2593 case SIOCGIFGENERIC:
2594 if (ifp->if_ioctl == NULL)
2595 return (EOPNOTSUPP);
2596 error = (*ifp->if_ioctl)(ifp, cmd, data);
2600 error = priv_check(td, PRIV_NET_SETLLADDR);
2603 error = if_setlladdr(ifp,
2604 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2605 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2610 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2612 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2615 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2621 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2627 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2629 error = priv_check(td, PRIV_NET_DELIFGROUP);
2632 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2644 #ifdef COMPAT_FREEBSD32
2652 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2659 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2666 CURVNET_SET(so->so_vnet);
2670 error = ifconf(cmd, data);
2674 #ifdef COMPAT_FREEBSD32
2677 struct ifconf32 *ifc32;
2680 ifc32 = (struct ifconf32 *)data;
2681 ifc.ifc_len = ifc32->ifc_len;
2682 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2684 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2687 ifc32->ifc_len = ifc.ifc_len;
2692 ifr = (struct ifreq *)data;
2697 error = priv_check(td, PRIV_NET_SETIFVNET);
2699 error = if_vmove_reclaim(td, ifr->ifr_name,
2706 error = priv_check(td, PRIV_NET_IFCREATE);
2708 error = if_clone_create(ifr->ifr_name,
2709 sizeof(ifr->ifr_name),
2710 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2714 error = priv_check(td, PRIV_NET_IFDESTROY);
2716 error = if_clone_destroy(ifr->ifr_name);
2720 case SIOCIFGCLONERS:
2721 error = if_clone_list((struct if_clonereq *)data);
2725 error = if_getgroupmembers((struct ifgroupreq *)data);
2728 #if defined(INET) || defined(INET6)
2731 if (carp_ioctl_p == NULL)
2732 error = EPROTONOSUPPORT;
2734 error = (*carp_ioctl_p)(ifr, cmd, td);
2740 ifp = ifunit_ref(ifr->ifr_name);
2746 error = ifhwioctl(cmd, ifp, data, td);
2747 if (error != ENOIOCTL) {
2753 oif_flags = ifp->if_flags;
2754 if (so->so_proto == NULL) {
2757 return (EOPNOTSUPP);
2761 * Pass the request on to the socket control method, and if the
2762 * latter returns EOPNOTSUPP, directly to the interface.
2764 * Make an exception for the legacy SIOCSIF* requests. Drivers
2765 * trust SIOCSIFADDR et al to come from an already privileged
2766 * layer, and do not perform any credentials checks or input
2770 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
2773 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2774 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2775 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2776 error = (*ifp->if_ioctl)(ifp, cmd, data);
2783 case SIOCSIFDSTADDR:
2785 case SIOCSIFBRDADDR:
2786 case SIOCSIFNETMASK:
2787 #if BYTE_ORDER != BIG_ENDIAN
2788 if (ifr->ifr_addr.sa_family == 0 &&
2789 ifr->ifr_addr.sa_len < 16) {
2790 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
2791 ifr->ifr_addr.sa_len = 16;
2794 if (ifr->ifr_addr.sa_len == 0)
2795 ifr->ifr_addr.sa_len = 16;
2803 case OSIOCGIFDSTADDR:
2804 cmd = SIOCGIFDSTADDR;
2807 case OSIOCGIFBRDADDR:
2808 cmd = SIOCGIFBRDADDR;
2811 case OSIOCGIFNETMASK:
2812 cmd = SIOCGIFNETMASK;
2814 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
2818 if (error == EOPNOTSUPP && ifp != NULL &&
2819 ifp->if_ioctl != NULL &&
2820 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2821 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2822 error = (*ifp->if_ioctl)(ifp, cmd, data);
2826 case OSIOCGIFDSTADDR:
2827 case OSIOCGIFBRDADDR:
2828 case OSIOCGIFNETMASK:
2829 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
2833 #endif /* COMPAT_43 */
2835 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2837 if (ifp->if_flags & IFF_UP)
2847 * The code common to handling reference counted flags,
2848 * e.g., in ifpromisc() and if_allmulti().
2849 * The "pflag" argument can specify a permanent mode flag to check,
2850 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2852 * Only to be used on stack-owned flags, not driver-owned flags.
2855 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2859 int oldflags, oldcount;
2861 /* Sanity checks to catch programming errors */
2862 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2863 ("%s: setting driver-owned flag %d", __func__, flag));
2866 KASSERT(*refcount >= 0,
2867 ("%s: increment negative refcount %d for flag %d",
2868 __func__, *refcount, flag));
2870 KASSERT(*refcount > 0,
2871 ("%s: decrement non-positive refcount %d for flag %d",
2872 __func__, *refcount, flag));
2874 /* In case this mode is permanent, just touch refcount */
2875 if (ifp->if_flags & pflag) {
2876 *refcount += onswitch ? 1 : -1;
2880 /* Save ifnet parameters for if_ioctl() may fail */
2881 oldcount = *refcount;
2882 oldflags = ifp->if_flags;
2885 * See if we aren't the only and touching refcount is enough.
2886 * Actually toggle interface flag if we are the first or last.
2891 ifp->if_flags |= flag;
2895 ifp->if_flags &= ~flag;
2898 /* Call down the driver since we've changed interface flags */
2899 if (ifp->if_ioctl == NULL) {
2903 ifr.ifr_flags = ifp->if_flags & 0xffff;
2904 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2905 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2908 /* Notify userland that interface flags have changed */
2913 /* Recover after driver error */
2914 *refcount = oldcount;
2915 ifp->if_flags = oldflags;
2920 * Set/clear promiscuous mode on interface ifp based on the truth value
2921 * of pswitch. The calls are reference counted so that only the first
2922 * "on" request actually has an effect, as does the final "off" request.
2923 * Results are undefined if the "off" and "on" requests are not matched.
2926 ifpromisc(struct ifnet *ifp, int pswitch)
2929 int oldflags = ifp->if_flags;
2931 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2932 &ifp->if_pcount, pswitch);
2933 /* If promiscuous mode status has changed, log a message */
2934 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
2935 log(LOG_INFO, "%s: promiscuous mode %s\n",
2937 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2942 * Return interface configuration
2943 * of system. List may be used
2944 * in later ioctl's (above) to get
2945 * other information.
2949 ifconf(u_long cmd, caddr_t data)
2951 struct ifconf *ifc = (struct ifconf *)data;
2956 int error, full = 0, valid_len, max_len;
2958 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2959 max_len = MAXPHYS - 1;
2961 /* Prevent hostile input from being able to crash the system */
2962 if (ifc->ifc_len <= 0)
2966 if (ifc->ifc_len <= max_len) {
2967 max_len = ifc->ifc_len;
2970 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2975 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2979 * Zero the ifr_name buffer to make sure we don't
2980 * disclose the contents of the stack.
2982 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2984 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2985 >= sizeof(ifr.ifr_name)) {
2988 return (ENAMETOOLONG);
2993 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2994 struct sockaddr *sa = ifa->ifa_addr;
2996 if (prison_if(curthread->td_ucred, sa) != 0)
3000 if (cmd == OSIOCGIFCONF) {
3001 struct osockaddr *osa =
3002 (struct osockaddr *)&ifr.ifr_addr;
3004 osa->sa_family = sa->sa_family;
3005 sbuf_bcat(sb, &ifr, sizeof(ifr));
3006 max_len += sizeof(ifr);
3009 if (sa->sa_len <= sizeof(*sa)) {
3011 sbuf_bcat(sb, &ifr, sizeof(ifr));
3012 max_len += sizeof(ifr);
3015 offsetof(struct ifreq, ifr_addr));
3016 max_len += offsetof(struct ifreq, ifr_addr);
3017 sbuf_bcat(sb, sa, sa->sa_len);
3018 max_len += sa->sa_len;
3021 if (sbuf_error(sb) == 0)
3022 valid_len = sbuf_len(sb);
3024 IF_ADDR_RUNLOCK(ifp);
3026 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3027 sbuf_bcat(sb, &ifr, sizeof(ifr));
3028 max_len += sizeof(ifr);
3030 if (sbuf_error(sb) == 0)
3031 valid_len = sbuf_len(sb);
3037 * If we didn't allocate enough space (uncommon), try again. If
3038 * we have already allocated as much space as we are allowed,
3039 * return what we've got.
3041 if (valid_len != max_len && !full) {
3046 ifc->ifc_len = valid_len;
3048 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3054 * Just like ifpromisc(), but for all-multicast-reception mode.
3057 if_allmulti(struct ifnet *ifp, int onswitch)
3060 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3063 struct ifmultiaddr *
3064 if_findmulti(struct ifnet *ifp, struct sockaddr *sa)
3066 struct ifmultiaddr *ifma;
3068 IF_ADDR_LOCK_ASSERT(ifp);
3070 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3071 if (sa->sa_family == AF_LINK) {
3072 if (sa_dl_equal(ifma->ifma_addr, sa))
3075 if (sa_equal(ifma->ifma_addr, sa))
3084 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3085 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3086 * the ifnet multicast address list here, so the caller must do that and
3087 * other setup work (such as notifying the device driver). The reference
3088 * count is initialized to 1.
3090 static struct ifmultiaddr *
3091 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3094 struct ifmultiaddr *ifma;
3095 struct sockaddr *dupsa;
3097 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3102 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3103 if (dupsa == NULL) {
3104 free(ifma, M_IFMADDR);
3107 bcopy(sa, dupsa, sa->sa_len);
3108 ifma->ifma_addr = dupsa;
3110 ifma->ifma_ifp = ifp;
3111 ifma->ifma_refcount = 1;
3112 ifma->ifma_protospec = NULL;
3115 ifma->ifma_lladdr = NULL;
3119 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3120 if (dupsa == NULL) {
3121 free(ifma->ifma_addr, M_IFMADDR);
3122 free(ifma, M_IFMADDR);
3125 bcopy(llsa, dupsa, llsa->sa_len);
3126 ifma->ifma_lladdr = dupsa;
3132 * if_freemulti: free ifmultiaddr structure and possibly attached related
3133 * addresses. The caller is responsible for implementing reference
3134 * counting, notifying the driver, handling routing messages, and releasing
3135 * any dependent link layer state.
3138 if_freemulti(struct ifmultiaddr *ifma)
3141 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3142 ifma->ifma_refcount));
3143 KASSERT(ifma->ifma_protospec == NULL,
3144 ("if_freemulti: protospec not NULL"));
3146 if (ifma->ifma_lladdr != NULL)
3147 free(ifma->ifma_lladdr, M_IFMADDR);
3148 free(ifma->ifma_addr, M_IFMADDR);
3149 free(ifma, M_IFMADDR);
3153 * Register an additional multicast address with a network interface.
3155 * - If the address is already present, bump the reference count on the
3156 * address and return.
3157 * - If the address is not link-layer, look up a link layer address.
3158 * - Allocate address structures for one or both addresses, and attach to the
3159 * multicast address list on the interface. If automatically adding a link
3160 * layer address, the protocol address will own a reference to the link
3161 * layer address, to be freed when it is freed.
3162 * - Notify the network device driver of an addition to the multicast address
3165 * 'sa' points to caller-owned memory with the desired multicast address.
3167 * 'retifma' will be used to return a pointer to the resulting multicast
3168 * address reference, if desired.
3171 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3172 struct ifmultiaddr **retifma)
3174 struct ifmultiaddr *ifma, *ll_ifma;
3175 struct sockaddr *llsa;
3179 * If the address is already present, return a new reference to it;
3180 * otherwise, allocate storage and set up a new address.
3183 ifma = if_findmulti(ifp, sa);
3185 ifma->ifma_refcount++;
3186 if (retifma != NULL)
3188 IF_ADDR_WUNLOCK(ifp);
3193 * The address isn't already present; resolve the protocol address
3194 * into a link layer address, and then look that up, bump its
3195 * refcount or allocate an ifma for that also. If 'llsa' was
3196 * returned, we will need to free it later.
3200 if (ifp->if_resolvemulti != NULL) {
3201 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3207 * Allocate the new address. Don't hook it up yet, as we may also
3208 * need to allocate a link layer multicast address.
3210 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3217 * If a link layer address is found, we'll need to see if it's
3218 * already present in the address list, or allocate is as well.
3219 * When this block finishes, the link layer address will be on the
3223 ll_ifma = if_findmulti(ifp, llsa);
3224 if (ll_ifma == NULL) {
3225 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3226 if (ll_ifma == NULL) {
3227 --ifma->ifma_refcount;
3232 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3235 ll_ifma->ifma_refcount++;
3236 ifma->ifma_llifma = ll_ifma;
3240 * We now have a new multicast address, ifma, and possibly a new or
3241 * referenced link layer address. Add the primary address to the
3242 * ifnet address list.
3244 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3246 if (retifma != NULL)
3250 * Must generate the message while holding the lock so that 'ifma'
3251 * pointer is still valid.
3253 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3254 IF_ADDR_WUNLOCK(ifp);
3257 * We are certain we have added something, so call down to the
3258 * interface to let them know about it.
3260 if (ifp->if_ioctl != NULL) {
3261 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3265 free(llsa, M_IFMADDR);
3271 free(llsa, M_IFMADDR);
3274 IF_ADDR_WUNLOCK(ifp);
3279 * Delete a multicast group membership by network-layer group address.
3281 * Returns ENOENT if the entry could not be found. If ifp no longer
3282 * exists, results are undefined. This entry point should only be used
3283 * from subsystems which do appropriate locking to hold ifp for the
3284 * duration of the call.
3285 * Network-layer protocol domains must use if_delmulti_ifma().
3288 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3290 struct ifmultiaddr *ifma;
3295 IFNET_RLOCK_NOSLEEP();
3296 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3301 IFNET_RUNLOCK_NOSLEEP();
3303 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3310 ifma = if_findmulti(ifp, sa);
3312 lastref = if_delmulti_locked(ifp, ifma, 0);
3313 IF_ADDR_WUNLOCK(ifp);
3318 if (lastref && ifp->if_ioctl != NULL) {
3319 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3326 * Delete all multicast group membership for an interface.
3327 * Should be used to quickly flush all multicast filters.
3330 if_delallmulti(struct ifnet *ifp)
3332 struct ifmultiaddr *ifma;
3333 struct ifmultiaddr *next;
3336 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3337 if_delmulti_locked(ifp, ifma, 0);
3338 IF_ADDR_WUNLOCK(ifp);
3342 * Delete a multicast group membership by group membership pointer.
3343 * Network-layer protocol domains must use this routine.
3345 * It is safe to call this routine if the ifp disappeared.
3348 if_delmulti_ifma(struct ifmultiaddr *ifma)
3353 ifp = ifma->ifma_ifp;
3356 printf("%s: ifma_ifp seems to be detached\n", __func__);
3360 IFNET_RLOCK_NOSLEEP();
3361 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3365 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3368 IFNET_RUNLOCK_NOSLEEP();
3372 * If and only if the ifnet instance exists: Acquire the address lock.
3377 lastref = if_delmulti_locked(ifp, ifma, 0);
3381 * If and only if the ifnet instance exists:
3382 * Release the address lock.
3383 * If the group was left: update the hardware hash filter.
3385 IF_ADDR_WUNLOCK(ifp);
3386 if (lastref && ifp->if_ioctl != NULL) {
3387 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3393 * Perform deletion of network-layer and/or link-layer multicast address.
3395 * Return 0 if the reference count was decremented.
3396 * Return 1 if the final reference was released, indicating that the
3397 * hardware hash filter should be reprogrammed.
3400 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3402 struct ifmultiaddr *ll_ifma;
3404 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3405 KASSERT(ifma->ifma_ifp == ifp,
3406 ("%s: inconsistent ifp %p", __func__, ifp));
3407 IF_ADDR_WLOCK_ASSERT(ifp);
3410 ifp = ifma->ifma_ifp;
3413 * If the ifnet is detaching, null out references to ifnet,
3414 * so that upper protocol layers will notice, and not attempt
3415 * to obtain locks for an ifnet which no longer exists. The
3416 * routing socket announcement must happen before the ifnet
3417 * instance is detached from the system.
3421 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3424 * ifp may already be nulled out if we are being reentered
3425 * to delete the ll_ifma.
3428 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3429 ifma->ifma_ifp = NULL;
3433 if (--ifma->ifma_refcount > 0)
3437 * If this ifma is a network-layer ifma, a link-layer ifma may
3438 * have been associated with it. Release it first if so.
3440 ll_ifma = ifma->ifma_llifma;
3441 if (ll_ifma != NULL) {
3442 KASSERT(ifma->ifma_lladdr != NULL,
3443 ("%s: llifma w/o lladdr", __func__));
3445 ll_ifma->ifma_ifp = NULL; /* XXX */
3446 if (--ll_ifma->ifma_refcount == 0) {
3448 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3451 if_freemulti(ll_ifma);
3456 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3461 * The last reference to this instance of struct ifmultiaddr
3462 * was released; the hardware should be notified of this change.
3468 * Set the link layer address on an interface.
3470 * At this time we only support certain types of interfaces,
3471 * and we don't allow the length of the address to change.
3474 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3476 struct sockaddr_dl *sdl;
3483 IF_ADDR_RUNLOCK(ifp);
3487 IF_ADDR_RUNLOCK(ifp);
3488 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3493 if (len != sdl->sdl_alen) { /* don't allow length to change */
3497 switch (ifp->if_type) {
3505 case IFT_IEEE8023ADLAG:
3507 bcopy(lladdr, LLADDR(sdl), len);
3516 * If the interface is already up, we need
3517 * to re-init it in order to reprogram its
3520 if ((ifp->if_flags & IFF_UP) != 0) {
3521 if (ifp->if_ioctl) {
3522 ifp->if_flags &= ~IFF_UP;
3523 ifr.ifr_flags = ifp->if_flags & 0xffff;
3524 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3525 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3526 ifp->if_flags |= IFF_UP;
3527 ifr.ifr_flags = ifp->if_flags & 0xffff;
3528 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3529 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3533 * Also send gratuitous ARPs to notify other nodes about
3534 * the address change.
3536 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3537 if (ifa->ifa_addr->sa_family == AF_INET)
3538 arp_ifinit(ifp, ifa);
3546 * The name argument must be a pointer to storage which will last as
3547 * long as the interface does. For physical devices, the result of
3548 * device_get_name(dev) is a good choice and for pseudo-devices a
3549 * static string works well.
3552 if_initname(struct ifnet *ifp, const char *name, int unit)
3554 ifp->if_dname = name;
3555 ifp->if_dunit = unit;
3556 if (unit != IF_DUNIT_NONE)
3557 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3559 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3563 if_printf(struct ifnet *ifp, const char * fmt, ...)
3568 retval = printf("%s: ", ifp->if_xname);
3570 retval += vprintf(fmt, ap);
3576 if_start(struct ifnet *ifp)
3579 (*(ifp)->if_start)(ifp);
3583 * Backwards compatibility interface for drivers
3584 * that have not implemented it
3587 if_transmit(struct ifnet *ifp, struct mbuf *m)
3591 IFQ_HANDOFF(ifp, m, error);
3596 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3603 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3608 if (_IF_QFULL(ifq)) {
3615 ifp->if_obytes += m->m_pkthdr.len + adjust;
3616 if (m->m_flags & (M_BCAST|M_MCAST))
3618 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3620 _IF_ENQUEUE(ifq, m);
3622 if (ifp != NULL && !active)
3623 (*(ifp)->if_start)(ifp);
3628 if_register_com_alloc(u_char type,
3629 if_com_alloc_t *a, if_com_free_t *f)
3632 KASSERT(if_com_alloc[type] == NULL,
3633 ("if_register_com_alloc: %d already registered", type));
3634 KASSERT(if_com_free[type] == NULL,
3635 ("if_register_com_alloc: %d free already registered", type));
3637 if_com_alloc[type] = a;
3638 if_com_free[type] = f;
3642 if_deregister_com_alloc(u_char type)
3645 KASSERT(if_com_alloc[type] != NULL,
3646 ("if_deregister_com_alloc: %d not registered", type));
3647 KASSERT(if_com_free[type] != NULL,
3648 ("if_deregister_com_alloc: %d free not registered", type));
3649 if_com_alloc[type] = NULL;
3650 if_com_free[type] = NULL;