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)
343 struct ifaddr *ifa = NULL;
345 IFNET_RLOCK_NOSLEEP();
346 ifp = ifnet_byindex_locked(idx);
347 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
349 IFNET_RUNLOCK_NOSLEEP();
354 * Network interface utility routines.
356 * Routines with ifa_ifwith* names take sockaddr *'s as
361 vnet_if_init(const void *unused __unused)
364 TAILQ_INIT(&V_ifnet);
365 TAILQ_INIT(&V_ifg_head);
367 if_grow(); /* create initial table */
369 vnet_if_clone_init();
371 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
376 if_init(void *dummy __unused)
382 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL);
387 vnet_if_uninit(const void *unused __unused)
390 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
391 "not empty", __func__, __LINE__, &V_ifnet));
392 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
393 "not empty", __func__, __LINE__, &V_ifg_head));
395 free((caddr_t)V_ifindex_table, M_IFNET);
397 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
398 vnet_if_uninit, NULL);
406 struct ifindex_entry *e;
408 IFNET_WLOCK_ASSERT();
409 oldlim = V_if_indexlim;
411 n = (oldlim << 1) * sizeof(*e);
412 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
414 if (V_if_indexlim != oldlim) {
418 if (V_ifindex_table != NULL) {
419 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
420 free((caddr_t)V_ifindex_table, M_IFNET);
427 * Allocate a struct ifnet and an index for an interface. A layer 2
428 * common structure will also be allocated if an allocation routine is
429 * registered for the passed type.
432 if_alloc(u_char type)
437 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
439 if (ifindex_alloc_locked(&idx) != 0) {
444 ifnet_setbyindex_locked(idx, IFNET_HOLD);
448 ifp->if_alloctype = type;
449 if (if_com_alloc[type] != NULL) {
450 ifp->if_l2com = if_com_alloc[type](type, ifp);
451 if (ifp->if_l2com == NULL) {
458 IF_ADDR_LOCK_INIT(ifp);
459 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
460 ifp->if_afdata_initialized = 0;
461 IF_AFDATA_LOCK_INIT(ifp);
462 TAILQ_INIT(&ifp->if_addrhead);
463 TAILQ_INIT(&ifp->if_multiaddrs);
464 TAILQ_INIT(&ifp->if_groups);
468 ifq_init(&ifp->if_snd, ifp);
470 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
471 ifnet_setbyindex(ifp->if_index, ifp);
476 * Do the actual work of freeing a struct ifnet, and layer 2 common
477 * structure. This call is made when the last reference to an
478 * interface is released.
481 if_free_internal(struct ifnet *ifp)
484 KASSERT((ifp->if_flags & IFF_DYING),
485 ("if_free_internal: interface not dying"));
487 if (if_com_free[ifp->if_alloctype] != NULL)
488 if_com_free[ifp->if_alloctype](ifp->if_l2com,
492 mac_ifnet_destroy(ifp);
494 if (ifp->if_description != NULL)
495 free(ifp->if_description, M_IFDESCR);
496 IF_AFDATA_DESTROY(ifp);
497 IF_ADDR_LOCK_DESTROY(ifp);
498 ifq_delete(&ifp->if_snd);
503 * Deregister an interface and free the associated storage.
506 if_free(struct ifnet *ifp)
509 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
511 CURVNET_SET_QUIET(ifp->if_vnet);
513 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
514 ("%s: freeing unallocated ifnet", ifp->if_xname));
516 ifindex_free_locked(ifp->if_index);
519 if (refcount_release(&ifp->if_refcount))
520 if_free_internal(ifp);
525 * Interfaces to keep an ifnet type-stable despite the possibility of the
526 * driver calling if_free(). If there are additional references, we defer
527 * freeing the underlying data structure.
530 if_ref(struct ifnet *ifp)
533 /* We don't assert the ifnet list lock here, but arguably should. */
534 refcount_acquire(&ifp->if_refcount);
538 if_rele(struct ifnet *ifp)
541 if (!refcount_release(&ifp->if_refcount))
543 if_free_internal(ifp);
547 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
550 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
552 if (ifq->ifq_maxlen == 0)
553 ifq->ifq_maxlen = ifqmaxlen;
556 ifq->altq_disc = NULL;
557 ifq->altq_flags &= ALTQF_CANTCHANGE;
558 ifq->altq_tbr = NULL;
563 ifq_delete(struct ifaltq *ifq)
565 mtx_destroy(&ifq->ifq_mtx);
569 * Perform generic interface initalization tasks and attach the interface
570 * to the list of "active" interfaces. If vmove flag is set on entry
571 * to if_attach_internal(), perform only a limited subset of initialization
572 * tasks, given that we are moving from one vnet to another an ifnet which
573 * has already been fully initialized.
575 * Note that if_detach_internal() removes group membership unconditionally
576 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
577 * Thus, when if_vmove() is applied to a cloned interface, group membership
578 * is lost while a cloned one always joins a group whose name is
579 * ifc->ifc_name. To recover this after if_detach_internal() and
580 * if_attach_internal(), the cloner should be specified to
581 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
582 * attempts to join a group whose name is ifc->ifc_name.
585 * - The decision to return void and thus require this function to
586 * succeed is questionable.
587 * - We should probably do more sanity checking. For instance we don't
588 * do anything to insure if_xname is unique or non-empty.
591 if_attach(struct ifnet *ifp)
594 if_attach_internal(ifp, 0, NULL);
598 * Compute the least common TSO limit.
601 if_hw_tsomax_common(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax)
604 * 1) If there is no limit currently, take the limit from
605 * the network adapter.
607 * 2) If the network adapter has a limit below the current
610 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
611 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
612 pmax->tsomaxbytes = ifp->if_hw_tsomax;
614 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
615 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
616 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
618 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
619 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
620 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
625 * Update TSO limit of a network adapter.
627 * Returns zero if no change. Else non-zero.
630 if_hw_tsomax_update(struct ifnet *ifp, struct ifnet_hw_tsomax *pmax)
633 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
634 ifp->if_hw_tsomax = pmax->tsomaxbytes;
637 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
638 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
641 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
642 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
649 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
651 unsigned socksize, ifasize;
652 int namelen, masklen;
653 struct sockaddr_dl *sdl;
656 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
657 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
661 ifp->if_vnet = curvnet;
662 if (ifp->if_home_vnet == NULL)
663 ifp->if_home_vnet = curvnet;
666 if_addgroup(ifp, IFG_ALL);
668 /* Restore group membership for cloned interfaces. */
669 if (vmove && ifc != NULL)
670 if_clone_addgroup(ifp, ifc);
672 getmicrotime(&ifp->if_lastchange);
673 ifp->if_data.ifi_epoch = time_uptime;
674 ifp->if_data.ifi_datalen = sizeof(struct if_data);
676 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
677 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
678 ("transmit and qflush must both either be set or both be NULL"));
679 if (ifp->if_transmit == NULL) {
680 ifp->if_transmit = if_transmit;
681 ifp->if_qflush = if_qflush;
683 if (ifp->if_input == NULL)
684 ifp->if_input = if_input_default;
688 mac_ifnet_create(ifp);
692 * Create a Link Level name for this device.
694 namelen = strlen(ifp->if_xname);
696 * Always save enough space for any possiable name so we
697 * can do a rename in place later.
699 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
700 socksize = masklen + ifp->if_addrlen;
701 if (socksize < sizeof(*sdl))
702 socksize = sizeof(*sdl);
703 socksize = roundup2(socksize, sizeof(long));
704 ifasize = sizeof(*ifa) + 2 * socksize;
705 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
707 sdl = (struct sockaddr_dl *)(ifa + 1);
708 sdl->sdl_len = socksize;
709 sdl->sdl_family = AF_LINK;
710 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
711 sdl->sdl_nlen = namelen;
712 sdl->sdl_index = ifp->if_index;
713 sdl->sdl_type = ifp->if_type;
716 ifa->ifa_rtrequest = link_rtrequest;
717 ifa->ifa_addr = (struct sockaddr *)sdl;
718 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
719 ifa->ifa_netmask = (struct sockaddr *)sdl;
720 sdl->sdl_len = masklen;
722 sdl->sdl_data[--namelen] = 0xff;
723 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
724 /* Reliably crash if used uninitialized. */
725 ifp->if_broadcastaddr = NULL;
727 #if defined(INET) || defined(INET6)
728 /* Use defaults for TSO, if nothing is set */
729 if (ifp->if_hw_tsomax == 0 &&
730 ifp->if_hw_tsomaxsegcount == 0 &&
731 ifp->if_hw_tsomaxsegsize == 0) {
733 * The TSO defaults needs to be such that an
734 * NFS mbuf list of 35 mbufs totalling just
735 * below 64K works and that a chain of mbufs
736 * can be defragged into at most 32 segments:
738 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
739 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
740 ifp->if_hw_tsomaxsegcount = 35;
741 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
743 /* XXX some drivers set IFCAP_TSO after ethernet attach */
744 if (ifp->if_capabilities & IFCAP_TSO) {
745 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
747 ifp->if_hw_tsomaxsegcount,
748 ifp->if_hw_tsomaxsegsize);
756 * Update the interface index in the link layer address
759 for (ifa = ifp->if_addr; ifa != NULL;
760 ifa = TAILQ_NEXT(ifa, ifa_link)) {
761 if (ifa->ifa_addr->sa_family == AF_LINK) {
762 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
763 sdl->sdl_index = ifp->if_index;
770 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
772 curvnet->vnet_ifcnt++;
776 if (domain_init_status >= 2)
777 if_attachdomain1(ifp);
779 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
780 if (IS_DEFAULT_VNET(curvnet))
781 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
783 /* Announce the interface. */
784 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
788 if_attachdomain(void *dummy)
792 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
793 if_attachdomain1(ifp);
795 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
796 if_attachdomain, NULL);
799 if_attachdomain1(struct ifnet *ifp)
804 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
805 * cannot lock ifp->if_afdata initialization, entirely.
807 if (IF_AFDATA_TRYLOCK(ifp) == 0)
809 if (ifp->if_afdata_initialized >= domain_init_status) {
810 IF_AFDATA_UNLOCK(ifp);
811 log(LOG_WARNING, "%s called more than once on %s\n",
812 __func__, ifp->if_xname);
815 ifp->if_afdata_initialized = domain_init_status;
816 IF_AFDATA_UNLOCK(ifp);
818 /* address family dependent data region */
819 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
820 for (dp = domains; dp; dp = dp->dom_next) {
821 if (dp->dom_ifattach)
822 ifp->if_afdata[dp->dom_family] =
823 (*dp->dom_ifattach)(ifp);
828 * Remove any unicast or broadcast network addresses from an interface.
831 if_purgeaddrs(struct ifnet *ifp)
833 struct ifaddr *ifa, *next;
835 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
836 if (ifa->ifa_addr->sa_family == AF_LINK)
839 /* XXX: Ugly!! ad hoc just for INET */
840 if (ifa->ifa_addr->sa_family == AF_INET) {
841 struct ifaliasreq ifr;
843 bzero(&ifr, sizeof(ifr));
844 ifr.ifra_addr = *ifa->ifa_addr;
845 if (ifa->ifa_dstaddr)
846 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
847 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
853 if (ifa->ifa_addr->sa_family == AF_INET6) {
855 /* ifp_addrhead is already updated */
859 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
865 * Remove any multicast network addresses from an interface when an ifnet
869 if_purgemaddrs(struct ifnet *ifp)
871 struct ifmultiaddr *ifma;
872 struct ifmultiaddr *next;
875 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
876 if_delmulti_locked(ifp, ifma, 1);
877 IF_ADDR_WUNLOCK(ifp);
881 * Detach an interface, removing it from the list of "active" interfaces.
882 * If vmove flag is set on entry to if_detach_internal(), perform only a
883 * limited subset of cleanup tasks, given that we are moving an ifnet from
884 * one vnet to another, where it must be fully operational.
886 * XXXRW: There are some significant questions about event ordering, and
887 * how to prevent things from starting to use the interface during detach.
890 if_detach(struct ifnet *ifp)
893 CURVNET_SET_QUIET(ifp->if_vnet);
894 if_detach_internal(ifp, 0, NULL);
899 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
902 struct radix_node_head *rnh;
909 TAILQ_FOREACH(iter, &V_ifnet, if_link)
911 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
917 curvnet->vnet_ifcnt--;
922 * While we would want to panic here, we cannot
923 * guarantee that the interface is indeed still on
924 * the list given we don't hold locks all the way.
929 panic("%s: ifp=%p not on the ifnet tailq %p",
930 __func__, ifp, &V_ifnet);
932 return; /* XXX this should panic as well? */
936 /* Check if this is a cloned interface or not. */
937 if (vmove && ifcp != NULL)
938 *ifcp = if_clone_findifc(ifp);
941 * Remove/wait for pending events.
943 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
946 * Remove routes and flush queues.
950 if (ALTQ_IS_ENABLED(&ifp->if_snd))
951 altq_disable(&ifp->if_snd);
952 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
953 altq_detach(&ifp->if_snd);
964 * Remove all IPv6 kernel structs related to ifp. This should be done
965 * before removing routing entries below, since IPv6 interface direct
966 * routes are expected to be removed by the IPv6-specific kernel API.
967 * Otherwise, the kernel will detect some inconsistency and bark it.
975 * Prevent further calls into the device driver via ifnet.
980 * Remove link ifaddr pointer and maybe decrement if_index.
981 * Clean up all addresses.
985 /* We can now free link ifaddr. */
986 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
987 ifa = TAILQ_FIRST(&ifp->if_addrhead);
988 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
994 * Delete all remaining routes using this interface
995 * Unfortuneatly the only way to do this is to slog through
996 * the entire routing table looking for routes which point
997 * to this interface...oh well...
999 for (i = 1; i <= AF_MAX; i++) {
1000 for (j = 0; j < rt_numfibs; j++) {
1001 rnh = rt_tables_get_rnh(j, i);
1004 RADIX_NODE_HEAD_LOCK(rnh);
1005 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
1006 RADIX_NODE_HEAD_UNLOCK(rnh);
1010 /* Announce that the interface is gone. */
1011 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1012 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1013 if (IS_DEFAULT_VNET(curvnet))
1014 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1018 * We cannot hold the lock over dom_ifdetach calls as they might
1019 * sleep, for example trying to drain a callout, thus open up the
1020 * theoretical race with re-attaching.
1022 IF_AFDATA_LOCK(ifp);
1023 i = ifp->if_afdata_initialized;
1024 ifp->if_afdata_initialized = 0;
1025 IF_AFDATA_UNLOCK(ifp);
1026 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1027 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1028 (*dp->dom_ifdetach)(ifp,
1029 ifp->if_afdata[dp->dom_family]);
1037 * if_vmove() performs a limited version of if_detach() in current
1038 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1039 * An attempt is made to shrink if_index in current vnet, find an
1040 * unused if_index in target vnet and calls if_grow() if necessary,
1041 * and finally find an unused if_xname for the target vnet.
1044 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1047 struct if_clone *ifc;
1051 * Detach from current vnet, but preserve LLADDR info, do not
1052 * mark as dead etc. so that the ifnet can be reattached later.
1053 * If we cannot find it, we lost the race to someone else.
1055 rc = if_detach_internal(ifp, 1, &ifc);
1060 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1061 * the if_index for that vnet if possible.
1063 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1064 * or we'd lock on one vnet and unlock on another.
1067 ifindex_free_locked(ifp->if_index);
1071 * Perform interface-specific reassignment tasks, if provided by
1074 if (ifp->if_reassign != NULL)
1075 ifp->if_reassign(ifp, new_vnet, NULL);
1078 * Switch to the context of the target vnet.
1080 CURVNET_SET_QUIET(new_vnet);
1083 if (ifindex_alloc_locked(&idx) != 0) {
1085 panic("if_index overflow");
1087 ifp->if_index = idx;
1088 ifnet_setbyindex_locked(ifp->if_index, ifp);
1091 if_attach_internal(ifp, 1, ifc);
1097 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1100 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1105 /* Try to find the prison within our visibility. */
1106 sx_slock(&allprison_lock);
1107 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1108 sx_sunlock(&allprison_lock);
1111 prison_hold_locked(pr);
1112 mtx_unlock(&pr->pr_mtx);
1114 /* Do not try to move the iface from and to the same prison. */
1115 if (pr->pr_vnet == ifp->if_vnet) {
1120 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1121 /* XXX Lock interfaces to avoid races. */
1122 CURVNET_SET_QUIET(pr->pr_vnet);
1123 difp = ifunit(ifname);
1130 /* Move the interface into the child jail/vnet. */
1131 if_vmove(ifp, pr->pr_vnet);
1133 /* Report the new if_xname back to the userland. */
1134 sprintf(ifname, "%s", ifp->if_xname);
1141 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1144 struct vnet *vnet_dst;
1147 /* Try to find the prison within our visibility. */
1148 sx_slock(&allprison_lock);
1149 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1150 sx_sunlock(&allprison_lock);
1153 prison_hold_locked(pr);
1154 mtx_unlock(&pr->pr_mtx);
1156 /* Make sure the named iface exists in the source prison/vnet. */
1157 CURVNET_SET(pr->pr_vnet);
1158 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1165 /* Do not try to move the iface from and to the same prison. */
1166 vnet_dst = TD_TO_VNET(td);
1167 if (vnet_dst == ifp->if_vnet) {
1173 /* Get interface back from child jail/vnet. */
1174 if_vmove(ifp, vnet_dst);
1177 /* Report the new if_xname back to the userland. */
1178 sprintf(ifname, "%s", ifp->if_xname);
1186 * Add a group to an interface
1189 if_addgroup(struct ifnet *ifp, const char *groupname)
1191 struct ifg_list *ifgl;
1192 struct ifg_group *ifg = NULL;
1193 struct ifg_member *ifgm;
1196 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1197 groupname[strlen(groupname) - 1] <= '9')
1201 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1202 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1207 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1208 M_NOWAIT)) == NULL) {
1213 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1214 M_TEMP, M_NOWAIT)) == NULL) {
1220 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1221 if (!strcmp(ifg->ifg_group, groupname))
1225 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1226 M_TEMP, M_NOWAIT)) == NULL) {
1232 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1233 ifg->ifg_refcnt = 0;
1234 TAILQ_INIT(&ifg->ifg_members);
1235 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1240 ifgl->ifgl_group = ifg;
1241 ifgm->ifgm_ifp = ifp;
1244 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1245 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1246 IF_ADDR_WUNLOCK(ifp);
1251 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1252 EVENTHANDLER_INVOKE(group_change_event, groupname);
1258 * Remove a group from an interface
1261 if_delgroup(struct ifnet *ifp, const char *groupname)
1263 struct ifg_list *ifgl;
1264 struct ifg_member *ifgm;
1267 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1268 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1276 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1277 IF_ADDR_WUNLOCK(ifp);
1279 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1280 if (ifgm->ifgm_ifp == ifp)
1284 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1288 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1289 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1291 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1292 free(ifgl->ifgl_group, M_TEMP);
1298 EVENTHANDLER_INVOKE(group_change_event, groupname);
1304 * Remove an interface from all groups
1307 if_delgroups(struct ifnet *ifp)
1309 struct ifg_list *ifgl;
1310 struct ifg_member *ifgm;
1311 char groupname[IFNAMSIZ];
1314 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1315 ifgl = TAILQ_FIRST(&ifp->if_groups);
1317 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1320 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1321 IF_ADDR_WUNLOCK(ifp);
1323 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1324 if (ifgm->ifgm_ifp == ifp)
1328 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1333 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1334 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1336 EVENTHANDLER_INVOKE(group_detach_event,
1338 free(ifgl->ifgl_group, M_TEMP);
1344 EVENTHANDLER_INVOKE(group_change_event, groupname);
1352 * Stores all groups from an interface in memory pointed
1356 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1359 struct ifg_list *ifgl;
1360 struct ifg_req ifgrq, *ifgp;
1361 struct ifgroupreq *ifgr = data;
1363 if (ifgr->ifgr_len == 0) {
1365 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1366 ifgr->ifgr_len += sizeof(struct ifg_req);
1367 IF_ADDR_RUNLOCK(ifp);
1371 len = ifgr->ifgr_len;
1372 ifgp = ifgr->ifgr_groups;
1375 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1376 if (len < sizeof(ifgrq)) {
1377 IF_ADDR_RUNLOCK(ifp);
1380 bzero(&ifgrq, sizeof ifgrq);
1381 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1382 sizeof(ifgrq.ifgrq_group));
1383 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1384 IF_ADDR_RUNLOCK(ifp);
1387 len -= sizeof(ifgrq);
1390 IF_ADDR_RUNLOCK(ifp);
1396 * Stores all members of a group in memory pointed to by data
1399 if_getgroupmembers(struct ifgroupreq *data)
1401 struct ifgroupreq *ifgr = data;
1402 struct ifg_group *ifg;
1403 struct ifg_member *ifgm;
1404 struct ifg_req ifgrq, *ifgp;
1408 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1409 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1416 if (ifgr->ifgr_len == 0) {
1417 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1418 ifgr->ifgr_len += sizeof(ifgrq);
1423 len = ifgr->ifgr_len;
1424 ifgp = ifgr->ifgr_groups;
1425 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1426 if (len < sizeof(ifgrq)) {
1430 bzero(&ifgrq, sizeof ifgrq);
1431 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1432 sizeof(ifgrq.ifgrq_member));
1433 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1437 len -= sizeof(ifgrq);
1446 * Delete Routes for a Network Interface
1448 * Called for each routing entry via the rnh->rnh_walktree() call above
1449 * to delete all route entries referencing a detaching network interface.
1452 * rn pointer to node in the routing table
1453 * arg argument passed to rnh->rnh_walktree() - detaching interface
1457 * errno failed - reason indicated
1461 if_rtdel(struct radix_node *rn, void *arg)
1463 struct rtentry *rt = (struct rtentry *)rn;
1464 struct ifnet *ifp = arg;
1467 if (rt->rt_ifp == ifp) {
1470 * Protect (sorta) against walktree recursion problems
1471 * with cloned routes
1473 if ((rt->rt_flags & RTF_UP) == 0)
1476 err = rtrequest_fib(RTM_DELETE, rt_key(rt), rt->rt_gateway,
1478 rt->rt_flags|RTF_RNH_LOCKED|RTF_PINNED,
1479 (struct rtentry **) NULL, rt->rt_fibnum);
1481 log(LOG_WARNING, "if_rtdel: error %d\n", err);
1489 * A compatibility function returns ifnet counter values.
1492 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1495 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1497 case IFCOUNTER_IPACKETS:
1498 return (ifp->if_ipackets);
1499 case IFCOUNTER_IERRORS:
1500 return (ifp->if_ierrors);
1501 case IFCOUNTER_OPACKETS:
1502 return (ifp->if_opackets);
1503 case IFCOUNTER_OERRORS:
1504 return (ifp->if_oerrors);
1505 case IFCOUNTER_COLLISIONS:
1506 return (ifp->if_collisions);
1507 case IFCOUNTER_IBYTES:
1508 return (ifp->if_ibytes);
1509 case IFCOUNTER_OBYTES:
1510 return (ifp->if_obytes);
1511 case IFCOUNTER_IMCASTS:
1512 return (ifp->if_imcasts);
1513 case IFCOUNTER_OMCASTS:
1514 return (ifp->if_omcasts);
1515 case IFCOUNTER_IQDROPS:
1516 return (ifp->if_iqdrops);
1518 case IFCOUNTER_OQDROPS:
1519 return (ifp->if_oqdrops);
1521 case IFCOUNTER_NOPROTO:
1522 return (ifp->if_noproto);
1530 * Increase an ifnet counter. Usually used for counters shared
1531 * between the stack and a driver, but function supports them all.
1534 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1537 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1539 case IFCOUNTER_IPACKETS:
1540 ifp->if_ipackets += inc;
1542 case IFCOUNTER_IERRORS:
1543 ifp->if_ierrors += inc;
1545 case IFCOUNTER_OPACKETS:
1546 ifp->if_opackets += inc;
1548 case IFCOUNTER_OERRORS:
1549 ifp->if_oerrors += inc;
1551 case IFCOUNTER_COLLISIONS:
1552 ifp->if_collisions += inc;
1554 case IFCOUNTER_IBYTES:
1555 ifp->if_ibytes += inc;
1557 case IFCOUNTER_OBYTES:
1558 ifp->if_obytes += inc;
1560 case IFCOUNTER_IMCASTS:
1561 ifp->if_imcasts += inc;
1563 case IFCOUNTER_OMCASTS:
1564 ifp->if_omcasts += inc;
1566 case IFCOUNTER_IQDROPS:
1567 ifp->if_iqdrops += inc;
1570 case IFCOUNTER_OQDROPS:
1571 ifp->if_oqdrops += inc;
1574 case IFCOUNTER_NOPROTO:
1575 ifp->if_noproto += inc;
1583 * Wrapper functions for struct ifnet address list locking macros. These are
1584 * used by kernel modules to avoid encoding programming interface or binary
1585 * interface assumptions that may be violated when kernel-internal locking
1586 * approaches change.
1589 if_addr_rlock(struct ifnet *ifp)
1596 if_addr_runlock(struct ifnet *ifp)
1599 IF_ADDR_RUNLOCK(ifp);
1603 if_maddr_rlock(struct ifnet *ifp)
1610 if_maddr_runlock(struct ifnet *ifp)
1613 IF_ADDR_RUNLOCK(ifp);
1617 * Initialization, destruction and refcounting functions for ifaddrs.
1620 ifa_init(struct ifaddr *ifa)
1623 mtx_init(&ifa->ifa_mtx, "ifaddr", NULL, MTX_DEF);
1624 refcount_init(&ifa->ifa_refcnt, 1);
1625 ifa->if_data.ifi_datalen = sizeof(ifa->if_data);
1629 ifa_ref(struct ifaddr *ifa)
1632 refcount_acquire(&ifa->ifa_refcnt);
1636 ifa_free(struct ifaddr *ifa)
1639 if (refcount_release(&ifa->ifa_refcnt)) {
1640 mtx_destroy(&ifa->ifa_mtx);
1641 free(ifa, M_IFADDR);
1646 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1649 struct rtentry *rt = NULL;
1650 struct rt_addrinfo info;
1651 static struct sockaddr_dl null_sdl = {sizeof(null_sdl), AF_LINK};
1653 bzero(&info, sizeof(info));
1654 info.rti_ifp = V_loif;
1655 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1656 info.rti_info[RTAX_DST] = ia;
1657 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1658 error = rtrequest1_fib(RTM_ADD, &info, &rt, ifa->ifa_ifp->if_fib);
1660 if (error == 0 && rt != NULL) {
1662 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_type =
1663 ifa->ifa_ifp->if_type;
1664 ((struct sockaddr_dl *)rt->rt_gateway)->sdl_index =
1665 ifa->ifa_ifp->if_index;
1668 } else if (error != 0)
1669 log(LOG_DEBUG, "%s: insertion failed: %u\n", __func__, error);
1675 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1678 struct rt_addrinfo info;
1679 struct sockaddr_dl null_sdl;
1681 bzero(&null_sdl, sizeof(null_sdl));
1682 null_sdl.sdl_len = sizeof(null_sdl);
1683 null_sdl.sdl_family = AF_LINK;
1684 null_sdl.sdl_type = ifa->ifa_ifp->if_type;
1685 null_sdl.sdl_index = ifa->ifa_ifp->if_index;
1686 bzero(&info, sizeof(info));
1687 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1688 info.rti_info[RTAX_DST] = ia;
1689 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1690 error = rtrequest1_fib(RTM_DELETE, &info, NULL, ifa->ifa_ifp->if_fib);
1693 log(LOG_DEBUG, "%s: deletion failed: %u\n", __func__, error);
1699 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1700 * structs used to represent other address families, it is necessary
1701 * to perform a different comparison.
1704 #define sa_equal(a1, a2) \
1705 (bcmp((a1), (a2), ((a1))->sa_len) == 0)
1707 #define sa_dl_equal(a1, a2) \
1708 ((((struct sockaddr_dl *)(a1))->sdl_len == \
1709 ((struct sockaddr_dl *)(a2))->sdl_len) && \
1710 (bcmp(LLADDR((struct sockaddr_dl *)(a1)), \
1711 LLADDR((struct sockaddr_dl *)(a2)), \
1712 ((struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1715 * Locate an interface based on a complete address.
1718 static struct ifaddr *
1719 ifa_ifwithaddr_internal(struct sockaddr *addr, int getref)
1724 IFNET_RLOCK_NOSLEEP();
1725 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1727 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1728 if (ifa->ifa_addr->sa_family != addr->sa_family)
1730 if (sa_equal(addr, ifa->ifa_addr)) {
1733 IF_ADDR_RUNLOCK(ifp);
1736 /* IP6 doesn't have broadcast */
1737 if ((ifp->if_flags & IFF_BROADCAST) &&
1738 ifa->ifa_broadaddr &&
1739 ifa->ifa_broadaddr->sa_len != 0 &&
1740 sa_equal(ifa->ifa_broadaddr, addr)) {
1743 IF_ADDR_RUNLOCK(ifp);
1747 IF_ADDR_RUNLOCK(ifp);
1751 IFNET_RUNLOCK_NOSLEEP();
1756 ifa_ifwithaddr(struct sockaddr *addr)
1759 return (ifa_ifwithaddr_internal(addr, 1));
1763 ifa_ifwithaddr_check(struct sockaddr *addr)
1766 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1770 * Locate an interface based on the broadcast address.
1774 ifa_ifwithbroadaddr(struct sockaddr *addr)
1779 IFNET_RLOCK_NOSLEEP();
1780 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1782 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1783 if (ifa->ifa_addr->sa_family != addr->sa_family)
1785 if ((ifp->if_flags & IFF_BROADCAST) &&
1786 ifa->ifa_broadaddr &&
1787 ifa->ifa_broadaddr->sa_len != 0 &&
1788 sa_equal(ifa->ifa_broadaddr, addr)) {
1790 IF_ADDR_RUNLOCK(ifp);
1794 IF_ADDR_RUNLOCK(ifp);
1798 IFNET_RUNLOCK_NOSLEEP();
1803 * Locate the point to point interface with a given destination address.
1807 ifa_ifwithdstaddr_fib(struct sockaddr *addr, int fibnum)
1812 IFNET_RLOCK_NOSLEEP();
1813 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1814 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1816 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1819 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1820 if (ifa->ifa_addr->sa_family != addr->sa_family)
1822 if (ifa->ifa_dstaddr != NULL &&
1823 sa_equal(addr, ifa->ifa_dstaddr)) {
1825 IF_ADDR_RUNLOCK(ifp);
1829 IF_ADDR_RUNLOCK(ifp);
1833 IFNET_RUNLOCK_NOSLEEP();
1838 ifa_ifwithdstaddr(struct sockaddr *addr)
1841 return (ifa_ifwithdstaddr_fib(addr, RT_ALL_FIBS));
1845 * Find an interface on a specific network. If many, choice
1846 * is most specific found.
1849 ifa_ifwithnet_fib(struct sockaddr *addr, int ignore_ptp, int fibnum)
1853 struct ifaddr *ifa_maybe = NULL;
1854 u_int af = addr->sa_family;
1855 char *addr_data = addr->sa_data, *cplim;
1858 * AF_LINK addresses can be looked up directly by their index number,
1859 * so do that if we can.
1861 if (af == AF_LINK) {
1862 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
1863 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1864 return (ifaddr_byindex(sdl->sdl_index));
1868 * Scan though each interface, looking for ones that have addresses
1869 * in this address family and the requested fib. Maintain a reference
1870 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1871 * kept it stable when we move onto the next interface.
1873 IFNET_RLOCK_NOSLEEP();
1874 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1875 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1878 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1879 char *cp, *cp2, *cp3;
1881 if (ifa->ifa_addr->sa_family != af)
1883 if (af == AF_INET &&
1884 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1886 * This is a bit broken as it doesn't
1887 * take into account that the remote end may
1888 * be a single node in the network we are
1890 * The trouble is that we don't know the
1891 * netmask for the remote end.
1893 if (ifa->ifa_dstaddr != NULL &&
1894 sa_equal(addr, ifa->ifa_dstaddr)) {
1896 IF_ADDR_RUNLOCK(ifp);
1901 * if we have a special address handler,
1902 * then use it instead of the generic one.
1904 if (ifa->ifa_claim_addr) {
1905 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
1907 IF_ADDR_RUNLOCK(ifp);
1914 * Scan all the bits in the ifa's address.
1915 * If a bit dissagrees with what we are
1916 * looking for, mask it with the netmask
1917 * to see if it really matters.
1918 * (A byte at a time)
1920 if (ifa->ifa_netmask == 0)
1923 cp2 = ifa->ifa_addr->sa_data;
1924 cp3 = ifa->ifa_netmask->sa_data;
1925 cplim = ifa->ifa_netmask->sa_len
1926 + (char *)ifa->ifa_netmask;
1928 if ((*cp++ ^ *cp2++) & *cp3++)
1929 goto next; /* next address! */
1931 * If the netmask of what we just found
1932 * is more specific than what we had before
1933 * (if we had one), or if the virtual status
1934 * of new prefix is better than of the old one,
1935 * then remember the new one before continuing
1936 * to search for an even better one.
1938 if (ifa_maybe == NULL ||
1939 ifa_preferred(ifa_maybe, ifa) ||
1940 rn_refines((caddr_t)ifa->ifa_netmask,
1941 (caddr_t)ifa_maybe->ifa_netmask)) {
1942 if (ifa_maybe != NULL)
1943 ifa_free(ifa_maybe);
1949 IF_ADDR_RUNLOCK(ifp);
1954 IFNET_RUNLOCK_NOSLEEP();
1955 if (ifa_maybe != NULL)
1956 ifa_free(ifa_maybe);
1961 ifa_ifwithnet(struct sockaddr *addr, int ignore_ptp)
1964 return (ifa_ifwithnet_fib(addr, ignore_ptp, RT_ALL_FIBS));
1968 * Find an interface address specific to an interface best matching
1972 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1975 char *cp, *cp2, *cp3;
1977 struct ifaddr *ifa_maybe = NULL;
1978 u_int af = addr->sa_family;
1983 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1984 if (ifa->ifa_addr->sa_family != af)
1986 if (ifa_maybe == NULL)
1988 if (ifa->ifa_netmask == 0) {
1989 if (sa_equal(addr, ifa->ifa_addr) ||
1990 (ifa->ifa_dstaddr &&
1991 sa_equal(addr, ifa->ifa_dstaddr)))
1995 if (ifp->if_flags & IFF_POINTOPOINT) {
1996 if (sa_equal(addr, ifa->ifa_dstaddr))
2000 cp2 = ifa->ifa_addr->sa_data;
2001 cp3 = ifa->ifa_netmask->sa_data;
2002 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2003 for (; cp3 < cplim; cp3++)
2004 if ((*cp++ ^ *cp2++) & *cp3)
2014 IF_ADDR_RUNLOCK(ifp);
2019 * See whether new ifa is better than current one:
2020 * 1) A non-virtual one is preferred over virtual.
2021 * 2) A virtual in master state preferred over any other state.
2023 * Used in several address selecting functions.
2026 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2029 return (cur->ifa_carp && (!next->ifa_carp ||
2030 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2033 #include <net/if_llatbl.h>
2036 * Default action when installing a route with a Link Level gateway.
2037 * Lookup an appropriate real ifa to point to.
2038 * This should be moved to /sys/net/link.c eventually.
2041 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
2043 struct ifaddr *ifa, *oifa;
2044 struct sockaddr *dst;
2049 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
2050 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
2052 ifa = ifaof_ifpforaddr(dst, ifp);
2057 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
2058 ifa->ifa_rtrequest(cmd, rt, info);
2063 * Mark an interface down and notify protocols of
2067 if_unroute(struct ifnet *ifp, int flag, int fam)
2071 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2073 ifp->if_flags &= ~flag;
2074 getmicrotime(&ifp->if_lastchange);
2075 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2076 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2077 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2078 ifp->if_qflush(ifp);
2081 (*carp_linkstate_p)(ifp);
2086 * Mark an interface up and notify protocols of
2090 if_route(struct ifnet *ifp, int flag, int fam)
2094 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2096 ifp->if_flags |= flag;
2097 getmicrotime(&ifp->if_lastchange);
2098 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2099 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2100 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2102 (*carp_linkstate_p)(ifp);
2109 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2110 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2111 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2112 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2113 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2114 int (*vlan_setcookie_p)(struct ifnet *, void *);
2115 void *(*vlan_cookie_p)(struct ifnet *);
2118 * Handle a change in the interface link state. To avoid LORs
2119 * between driver lock and upper layer locks, as well as possible
2120 * recursions, we post event to taskqueue, and all job
2121 * is done in static do_link_state_change().
2124 if_link_state_change(struct ifnet *ifp, int link_state)
2126 /* Return if state hasn't changed. */
2127 if (ifp->if_link_state == link_state)
2130 ifp->if_link_state = link_state;
2132 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2136 do_link_state_change(void *arg, int pending)
2138 struct ifnet *ifp = (struct ifnet *)arg;
2139 int link_state = ifp->if_link_state;
2140 CURVNET_SET(ifp->if_vnet);
2142 /* Notify that the link state has changed. */
2144 if (ifp->if_vlantrunk != NULL)
2145 (*vlan_link_state_p)(ifp);
2147 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2148 IFP2AC(ifp)->ac_netgraph != NULL)
2149 (*ng_ether_link_state_p)(ifp, link_state);
2151 (*carp_linkstate_p)(ifp);
2153 (*bridge_linkstate_p)(ifp);
2155 (*lagg_linkstate_p)(ifp, link_state);
2157 if (IS_DEFAULT_VNET(curvnet))
2158 devctl_notify("IFNET", ifp->if_xname,
2159 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2162 if_printf(ifp, "%d link states coalesced\n", pending);
2163 if (log_link_state_change)
2164 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2165 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2166 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2171 * Mark an interface down and notify protocols of
2175 if_down(struct ifnet *ifp)
2178 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2182 * Mark an interface up and notify protocols of
2186 if_up(struct ifnet *ifp)
2189 if_route(ifp, IFF_UP, AF_UNSPEC);
2193 * Flush an interface queue.
2196 if_qflush(struct ifnet *ifp)
2204 if (ALTQ_IS_ENABLED(ifq))
2208 while ((m = n) != 0) {
2219 * Map interface name to interface structure pointer, with or without
2220 * returning a reference.
2223 ifunit_ref(const char *name)
2227 IFNET_RLOCK_NOSLEEP();
2228 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2229 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2230 !(ifp->if_flags & IFF_DYING))
2235 IFNET_RUNLOCK_NOSLEEP();
2240 ifunit(const char *name)
2244 IFNET_RLOCK_NOSLEEP();
2245 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2246 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2249 IFNET_RUNLOCK_NOSLEEP();
2254 * Hardware specific interface ioctls.
2257 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2262 int new_flags, temp_flags;
2263 size_t namelen, onamelen;
2265 char *descrbuf, *odescrbuf;
2266 char new_name[IFNAMSIZ];
2268 struct sockaddr_dl *sdl;
2270 ifr = (struct ifreq *)data;
2273 ifr->ifr_index = ifp->if_index;
2277 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2278 ifr->ifr_flags = temp_flags & 0xffff;
2279 ifr->ifr_flagshigh = temp_flags >> 16;
2283 ifr->ifr_reqcap = ifp->if_capabilities;
2284 ifr->ifr_curcap = ifp->if_capenable;
2289 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2294 ifr->ifr_metric = ifp->if_metric;
2298 ifr->ifr_mtu = ifp->if_mtu;
2302 ifr->ifr_phys = ifp->if_physical;
2307 sx_slock(&ifdescr_sx);
2308 if (ifp->if_description == NULL)
2311 /* space for terminating nul */
2312 descrlen = strlen(ifp->if_description) + 1;
2313 if (ifr->ifr_buffer.length < descrlen)
2314 ifr->ifr_buffer.buffer = NULL;
2316 error = copyout(ifp->if_description,
2317 ifr->ifr_buffer.buffer, descrlen);
2318 ifr->ifr_buffer.length = descrlen;
2320 sx_sunlock(&ifdescr_sx);
2324 error = priv_check(td, PRIV_NET_SETIFDESCR);
2329 * Copy only (length-1) bytes to make sure that
2330 * if_description is always nul terminated. The
2331 * length parameter is supposed to count the
2332 * terminating nul in.
2334 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2335 return (ENAMETOOLONG);
2336 else if (ifr->ifr_buffer.length == 0)
2339 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2341 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2342 ifr->ifr_buffer.length - 1);
2344 free(descrbuf, M_IFDESCR);
2349 sx_xlock(&ifdescr_sx);
2350 odescrbuf = ifp->if_description;
2351 ifp->if_description = descrbuf;
2352 sx_xunlock(&ifdescr_sx);
2354 getmicrotime(&ifp->if_lastchange);
2355 free(odescrbuf, M_IFDESCR);
2359 ifr->ifr_fib = ifp->if_fib;
2363 error = priv_check(td, PRIV_NET_SETIFFIB);
2366 if (ifr->ifr_fib >= rt_numfibs)
2369 ifp->if_fib = ifr->ifr_fib;
2373 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2377 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2378 * check, so we don't need special handling here yet.
2380 new_flags = (ifr->ifr_flags & 0xffff) |
2381 (ifr->ifr_flagshigh << 16);
2382 if (ifp->if_flags & IFF_SMART) {
2383 /* Smart drivers twiddle their own routes */
2384 } else if (ifp->if_flags & IFF_UP &&
2385 (new_flags & IFF_UP) == 0) {
2387 } else if (new_flags & IFF_UP &&
2388 (ifp->if_flags & IFF_UP) == 0) {
2391 /* See if permanently promiscuous mode bit is about to flip */
2392 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2393 if (new_flags & IFF_PPROMISC)
2394 ifp->if_flags |= IFF_PROMISC;
2395 else if (ifp->if_pcount == 0)
2396 ifp->if_flags &= ~IFF_PROMISC;
2397 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2399 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
2401 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2402 (new_flags &~ IFF_CANTCHANGE);
2403 if (ifp->if_ioctl) {
2404 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2406 getmicrotime(&ifp->if_lastchange);
2410 error = priv_check(td, PRIV_NET_SETIFCAP);
2413 if (ifp->if_ioctl == NULL)
2414 return (EOPNOTSUPP);
2415 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2417 error = (*ifp->if_ioctl)(ifp, cmd, data);
2419 getmicrotime(&ifp->if_lastchange);
2424 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2429 error = priv_check(td, PRIV_NET_SETIFNAME);
2432 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2435 if (new_name[0] == '\0')
2437 if (ifunit(new_name) != NULL)
2441 * XXX: Locking. Nothing else seems to lock if_flags,
2442 * and there are numerous other races with the
2443 * ifunit() checks not being atomic with namespace
2444 * changes (renames, vmoves, if_attach, etc).
2446 ifp->if_flags |= IFF_RENAMING;
2448 /* Announce the departure of the interface. */
2449 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2450 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2452 log(LOG_INFO, "%s: changing name to '%s'\n",
2453 ifp->if_xname, new_name);
2455 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2458 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2459 namelen = strlen(new_name);
2460 onamelen = sdl->sdl_nlen;
2462 * Move the address if needed. This is safe because we
2463 * allocate space for a name of length IFNAMSIZ when we
2464 * create this in if_attach().
2466 if (namelen != onamelen) {
2467 bcopy(sdl->sdl_data + onamelen,
2468 sdl->sdl_data + namelen, sdl->sdl_alen);
2470 bcopy(new_name, sdl->sdl_data, namelen);
2471 sdl->sdl_nlen = namelen;
2472 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2473 bzero(sdl->sdl_data, onamelen);
2474 while (namelen != 0)
2475 sdl->sdl_data[--namelen] = 0xff;
2478 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2479 /* Announce the return of the interface. */
2480 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2482 ifp->if_flags &= ~IFF_RENAMING;
2487 error = priv_check(td, PRIV_NET_SETIFVNET);
2490 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2495 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2498 ifp->if_metric = ifr->ifr_metric;
2499 getmicrotime(&ifp->if_lastchange);
2503 error = priv_check(td, PRIV_NET_SETIFPHYS);
2506 if (ifp->if_ioctl == NULL)
2507 return (EOPNOTSUPP);
2508 error = (*ifp->if_ioctl)(ifp, cmd, data);
2510 getmicrotime(&ifp->if_lastchange);
2515 u_long oldmtu = ifp->if_mtu;
2517 error = priv_check(td, PRIV_NET_SETIFMTU);
2520 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2522 if (ifp->if_ioctl == NULL)
2523 return (EOPNOTSUPP);
2524 error = (*ifp->if_ioctl)(ifp, cmd, data);
2526 getmicrotime(&ifp->if_lastchange);
2530 * If the link MTU changed, do network layer specific procedure.
2532 if (ifp->if_mtu != oldmtu) {
2542 if (cmd == SIOCADDMULTI)
2543 error = priv_check(td, PRIV_NET_ADDMULTI);
2545 error = priv_check(td, PRIV_NET_DELMULTI);
2549 /* Don't allow group membership on non-multicast interfaces. */
2550 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2551 return (EOPNOTSUPP);
2553 /* Don't let users screw up protocols' entries. */
2554 if (ifr->ifr_addr.sa_family != AF_LINK)
2557 if (cmd == SIOCADDMULTI) {
2558 struct ifmultiaddr *ifma;
2561 * Userland is only permitted to join groups once
2562 * via the if_addmulti() KPI, because it cannot hold
2563 * struct ifmultiaddr * between calls. It may also
2564 * lose a race while we check if the membership
2568 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2569 IF_ADDR_RUNLOCK(ifp);
2573 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2575 error = if_delmulti(ifp, &ifr->ifr_addr);
2578 getmicrotime(&ifp->if_lastchange);
2581 case SIOCSIFPHYADDR:
2582 case SIOCDIFPHYADDR:
2584 case SIOCSIFPHYADDR_IN6:
2586 case SIOCSLIFPHYADDR:
2588 case SIOCSIFGENERIC:
2589 error = priv_check(td, PRIV_NET_HWIOCTL);
2592 if (ifp->if_ioctl == NULL)
2593 return (EOPNOTSUPP);
2594 error = (*ifp->if_ioctl)(ifp, cmd, data);
2596 getmicrotime(&ifp->if_lastchange);
2600 ifs = (struct ifstat *)data;
2601 ifs->ascii[0] = '\0';
2603 case SIOCGIFPSRCADDR:
2604 case SIOCGIFPDSTADDR:
2605 case SIOCGLIFPHYADDR:
2608 case SIOCGIFGENERIC:
2609 if (ifp->if_ioctl == NULL)
2610 return (EOPNOTSUPP);
2611 error = (*ifp->if_ioctl)(ifp, cmd, data);
2615 error = priv_check(td, PRIV_NET_SETLLADDR);
2618 error = if_setlladdr(ifp,
2619 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2620 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
2625 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2627 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2630 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2636 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2642 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2644 error = priv_check(td, PRIV_NET_DELIFGROUP);
2647 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2659 #ifdef COMPAT_FREEBSD32
2667 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2674 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2681 CURVNET_SET(so->so_vnet);
2685 error = ifconf(cmd, data);
2689 #ifdef COMPAT_FREEBSD32
2692 struct ifconf32 *ifc32;
2695 ifc32 = (struct ifconf32 *)data;
2696 ifc.ifc_len = ifc32->ifc_len;
2697 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2699 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2702 ifc32->ifc_len = ifc.ifc_len;
2707 ifr = (struct ifreq *)data;
2712 error = priv_check(td, PRIV_NET_SETIFVNET);
2714 error = if_vmove_reclaim(td, ifr->ifr_name,
2721 error = priv_check(td, PRIV_NET_IFCREATE);
2723 error = if_clone_create(ifr->ifr_name,
2724 sizeof(ifr->ifr_name),
2725 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2729 error = priv_check(td, PRIV_NET_IFDESTROY);
2731 error = if_clone_destroy(ifr->ifr_name);
2735 case SIOCIFGCLONERS:
2736 error = if_clone_list((struct if_clonereq *)data);
2740 error = if_getgroupmembers((struct ifgroupreq *)data);
2743 #if defined(INET) || defined(INET6)
2746 if (carp_ioctl_p == NULL)
2747 error = EPROTONOSUPPORT;
2749 error = (*carp_ioctl_p)(ifr, cmd, td);
2755 ifp = ifunit_ref(ifr->ifr_name);
2761 error = ifhwioctl(cmd, ifp, data, td);
2762 if (error != ENOIOCTL) {
2768 oif_flags = ifp->if_flags;
2769 if (so->so_proto == NULL) {
2772 return (EOPNOTSUPP);
2776 * Pass the request on to the socket control method, and if the
2777 * latter returns EOPNOTSUPP, directly to the interface.
2779 * Make an exception for the legacy SIOCSIF* requests. Drivers
2780 * trust SIOCSIFADDR et al to come from an already privileged
2781 * layer, and do not perform any credentials checks or input
2785 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
2788 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2789 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2790 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2791 error = (*ifp->if_ioctl)(ifp, cmd, data);
2798 case SIOCSIFDSTADDR:
2800 case SIOCSIFBRDADDR:
2801 case SIOCSIFNETMASK:
2802 #if BYTE_ORDER != BIG_ENDIAN
2803 if (ifr->ifr_addr.sa_family == 0 &&
2804 ifr->ifr_addr.sa_len < 16) {
2805 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
2806 ifr->ifr_addr.sa_len = 16;
2809 if (ifr->ifr_addr.sa_len == 0)
2810 ifr->ifr_addr.sa_len = 16;
2818 case OSIOCGIFDSTADDR:
2819 cmd = SIOCGIFDSTADDR;
2822 case OSIOCGIFBRDADDR:
2823 cmd = SIOCGIFBRDADDR;
2826 case OSIOCGIFNETMASK:
2827 cmd = SIOCGIFNETMASK;
2829 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
2833 if (error == EOPNOTSUPP && ifp != NULL &&
2834 ifp->if_ioctl != NULL &&
2835 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2836 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2837 error = (*ifp->if_ioctl)(ifp, cmd, data);
2841 case OSIOCGIFDSTADDR:
2842 case OSIOCGIFBRDADDR:
2843 case OSIOCGIFNETMASK:
2844 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
2848 #endif /* COMPAT_43 */
2850 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2852 if (ifp->if_flags & IFF_UP)
2862 * The code common to handling reference counted flags,
2863 * e.g., in ifpromisc() and if_allmulti().
2864 * The "pflag" argument can specify a permanent mode flag to check,
2865 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2867 * Only to be used on stack-owned flags, not driver-owned flags.
2870 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2874 int oldflags, oldcount;
2876 /* Sanity checks to catch programming errors */
2877 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2878 ("%s: setting driver-owned flag %d", __func__, flag));
2881 KASSERT(*refcount >= 0,
2882 ("%s: increment negative refcount %d for flag %d",
2883 __func__, *refcount, flag));
2885 KASSERT(*refcount > 0,
2886 ("%s: decrement non-positive refcount %d for flag %d",
2887 __func__, *refcount, flag));
2889 /* In case this mode is permanent, just touch refcount */
2890 if (ifp->if_flags & pflag) {
2891 *refcount += onswitch ? 1 : -1;
2895 /* Save ifnet parameters for if_ioctl() may fail */
2896 oldcount = *refcount;
2897 oldflags = ifp->if_flags;
2900 * See if we aren't the only and touching refcount is enough.
2901 * Actually toggle interface flag if we are the first or last.
2906 ifp->if_flags |= flag;
2910 ifp->if_flags &= ~flag;
2913 /* Call down the driver since we've changed interface flags */
2914 if (ifp->if_ioctl == NULL) {
2918 ifr.ifr_flags = ifp->if_flags & 0xffff;
2919 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2920 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2923 /* Notify userland that interface flags have changed */
2928 /* Recover after driver error */
2929 *refcount = oldcount;
2930 ifp->if_flags = oldflags;
2935 * Set/clear promiscuous mode on interface ifp based on the truth value
2936 * of pswitch. The calls are reference counted so that only the first
2937 * "on" request actually has an effect, as does the final "off" request.
2938 * Results are undefined if the "off" and "on" requests are not matched.
2941 ifpromisc(struct ifnet *ifp, int pswitch)
2944 int oldflags = ifp->if_flags;
2946 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2947 &ifp->if_pcount, pswitch);
2948 /* If promiscuous mode status has changed, log a message */
2949 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
2950 log(LOG_INFO, "%s: promiscuous mode %s\n",
2952 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2957 * Return interface configuration
2958 * of system. List may be used
2959 * in later ioctl's (above) to get
2960 * other information.
2964 ifconf(u_long cmd, caddr_t data)
2966 struct ifconf *ifc = (struct ifconf *)data;
2971 int error, full = 0, valid_len, max_len;
2973 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2974 max_len = MAXPHYS - 1;
2976 /* Prevent hostile input from being able to crash the system */
2977 if (ifc->ifc_len <= 0)
2981 if (ifc->ifc_len <= max_len) {
2982 max_len = ifc->ifc_len;
2985 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2990 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2994 * Zero the ifr_name buffer to make sure we don't
2995 * disclose the contents of the stack.
2997 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2999 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3000 >= sizeof(ifr.ifr_name)) {
3003 return (ENAMETOOLONG);
3008 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3009 struct sockaddr *sa = ifa->ifa_addr;
3011 if (prison_if(curthread->td_ucred, sa) != 0)
3015 if (cmd == OSIOCGIFCONF) {
3016 struct osockaddr *osa =
3017 (struct osockaddr *)&ifr.ifr_addr;
3019 osa->sa_family = sa->sa_family;
3020 sbuf_bcat(sb, &ifr, sizeof(ifr));
3021 max_len += sizeof(ifr);
3024 if (sa->sa_len <= sizeof(*sa)) {
3026 sbuf_bcat(sb, &ifr, sizeof(ifr));
3027 max_len += sizeof(ifr);
3030 offsetof(struct ifreq, ifr_addr));
3031 max_len += offsetof(struct ifreq, ifr_addr);
3032 sbuf_bcat(sb, sa, sa->sa_len);
3033 max_len += sa->sa_len;
3036 if (sbuf_error(sb) == 0)
3037 valid_len = sbuf_len(sb);
3039 IF_ADDR_RUNLOCK(ifp);
3041 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
3042 sbuf_bcat(sb, &ifr, sizeof(ifr));
3043 max_len += sizeof(ifr);
3045 if (sbuf_error(sb) == 0)
3046 valid_len = sbuf_len(sb);
3052 * If we didn't allocate enough space (uncommon), try again. If
3053 * we have already allocated as much space as we are allowed,
3054 * return what we've got.
3056 if (valid_len != max_len && !full) {
3061 ifc->ifc_len = valid_len;
3063 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3069 * Just like ifpromisc(), but for all-multicast-reception mode.
3072 if_allmulti(struct ifnet *ifp, int onswitch)
3075 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3078 struct ifmultiaddr *
3079 if_findmulti(struct ifnet *ifp, struct sockaddr *sa)
3081 struct ifmultiaddr *ifma;
3083 IF_ADDR_LOCK_ASSERT(ifp);
3085 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3086 if (sa->sa_family == AF_LINK) {
3087 if (sa_dl_equal(ifma->ifma_addr, sa))
3090 if (sa_equal(ifma->ifma_addr, sa))
3099 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3100 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3101 * the ifnet multicast address list here, so the caller must do that and
3102 * other setup work (such as notifying the device driver). The reference
3103 * count is initialized to 1.
3105 static struct ifmultiaddr *
3106 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3109 struct ifmultiaddr *ifma;
3110 struct sockaddr *dupsa;
3112 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3117 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3118 if (dupsa == NULL) {
3119 free(ifma, M_IFMADDR);
3122 bcopy(sa, dupsa, sa->sa_len);
3123 ifma->ifma_addr = dupsa;
3125 ifma->ifma_ifp = ifp;
3126 ifma->ifma_refcount = 1;
3127 ifma->ifma_protospec = NULL;
3130 ifma->ifma_lladdr = NULL;
3134 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3135 if (dupsa == NULL) {
3136 free(ifma->ifma_addr, M_IFMADDR);
3137 free(ifma, M_IFMADDR);
3140 bcopy(llsa, dupsa, llsa->sa_len);
3141 ifma->ifma_lladdr = dupsa;
3147 * if_freemulti: free ifmultiaddr structure and possibly attached related
3148 * addresses. The caller is responsible for implementing reference
3149 * counting, notifying the driver, handling routing messages, and releasing
3150 * any dependent link layer state.
3153 if_freemulti(struct ifmultiaddr *ifma)
3156 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3157 ifma->ifma_refcount));
3158 KASSERT(ifma->ifma_protospec == NULL,
3159 ("if_freemulti: protospec not NULL"));
3161 if (ifma->ifma_lladdr != NULL)
3162 free(ifma->ifma_lladdr, M_IFMADDR);
3163 free(ifma->ifma_addr, M_IFMADDR);
3164 free(ifma, M_IFMADDR);
3168 * Register an additional multicast address with a network interface.
3170 * - If the address is already present, bump the reference count on the
3171 * address and return.
3172 * - If the address is not link-layer, look up a link layer address.
3173 * - Allocate address structures for one or both addresses, and attach to the
3174 * multicast address list on the interface. If automatically adding a link
3175 * layer address, the protocol address will own a reference to the link
3176 * layer address, to be freed when it is freed.
3177 * - Notify the network device driver of an addition to the multicast address
3180 * 'sa' points to caller-owned memory with the desired multicast address.
3182 * 'retifma' will be used to return a pointer to the resulting multicast
3183 * address reference, if desired.
3186 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3187 struct ifmultiaddr **retifma)
3189 struct ifmultiaddr *ifma, *ll_ifma;
3190 struct sockaddr *llsa;
3194 * If the address is already present, return a new reference to it;
3195 * otherwise, allocate storage and set up a new address.
3198 ifma = if_findmulti(ifp, sa);
3200 ifma->ifma_refcount++;
3201 if (retifma != NULL)
3203 IF_ADDR_WUNLOCK(ifp);
3208 * The address isn't already present; resolve the protocol address
3209 * into a link layer address, and then look that up, bump its
3210 * refcount or allocate an ifma for that also. If 'llsa' was
3211 * returned, we will need to free it later.
3215 if (ifp->if_resolvemulti != NULL) {
3216 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3222 * Allocate the new address. Don't hook it up yet, as we may also
3223 * need to allocate a link layer multicast address.
3225 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3232 * If a link layer address is found, we'll need to see if it's
3233 * already present in the address list, or allocate is as well.
3234 * When this block finishes, the link layer address will be on the
3238 ll_ifma = if_findmulti(ifp, llsa);
3239 if (ll_ifma == NULL) {
3240 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3241 if (ll_ifma == NULL) {
3242 --ifma->ifma_refcount;
3247 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3250 ll_ifma->ifma_refcount++;
3251 ifma->ifma_llifma = ll_ifma;
3255 * We now have a new multicast address, ifma, and possibly a new or
3256 * referenced link layer address. Add the primary address to the
3257 * ifnet address list.
3259 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3261 if (retifma != NULL)
3265 * Must generate the message while holding the lock so that 'ifma'
3266 * pointer is still valid.
3268 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3269 IF_ADDR_WUNLOCK(ifp);
3272 * We are certain we have added something, so call down to the
3273 * interface to let them know about it.
3275 if (ifp->if_ioctl != NULL) {
3276 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3280 free(llsa, M_IFMADDR);
3286 free(llsa, M_IFMADDR);
3289 IF_ADDR_WUNLOCK(ifp);
3294 * Delete a multicast group membership by network-layer group address.
3296 * Returns ENOENT if the entry could not be found. If ifp no longer
3297 * exists, results are undefined. This entry point should only be used
3298 * from subsystems which do appropriate locking to hold ifp for the
3299 * duration of the call.
3300 * Network-layer protocol domains must use if_delmulti_ifma().
3303 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3305 struct ifmultiaddr *ifma;
3310 IFNET_RLOCK_NOSLEEP();
3311 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3316 IFNET_RUNLOCK_NOSLEEP();
3318 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3325 ifma = if_findmulti(ifp, sa);
3327 lastref = if_delmulti_locked(ifp, ifma, 0);
3328 IF_ADDR_WUNLOCK(ifp);
3333 if (lastref && ifp->if_ioctl != NULL) {
3334 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3341 * Delete all multicast group membership for an interface.
3342 * Should be used to quickly flush all multicast filters.
3345 if_delallmulti(struct ifnet *ifp)
3347 struct ifmultiaddr *ifma;
3348 struct ifmultiaddr *next;
3351 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3352 if_delmulti_locked(ifp, ifma, 0);
3353 IF_ADDR_WUNLOCK(ifp);
3357 * Delete a multicast group membership by group membership pointer.
3358 * Network-layer protocol domains must use this routine.
3360 * It is safe to call this routine if the ifp disappeared.
3363 if_delmulti_ifma(struct ifmultiaddr *ifma)
3368 ifp = ifma->ifma_ifp;
3371 printf("%s: ifma_ifp seems to be detached\n", __func__);
3375 IFNET_RLOCK_NOSLEEP();
3376 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3380 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3383 IFNET_RUNLOCK_NOSLEEP();
3387 * If and only if the ifnet instance exists: Acquire the address lock.
3392 lastref = if_delmulti_locked(ifp, ifma, 0);
3396 * If and only if the ifnet instance exists:
3397 * Release the address lock.
3398 * If the group was left: update the hardware hash filter.
3400 IF_ADDR_WUNLOCK(ifp);
3401 if (lastref && ifp->if_ioctl != NULL) {
3402 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3408 * Perform deletion of network-layer and/or link-layer multicast address.
3410 * Return 0 if the reference count was decremented.
3411 * Return 1 if the final reference was released, indicating that the
3412 * hardware hash filter should be reprogrammed.
3415 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3417 struct ifmultiaddr *ll_ifma;
3419 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3420 KASSERT(ifma->ifma_ifp == ifp,
3421 ("%s: inconsistent ifp %p", __func__, ifp));
3422 IF_ADDR_WLOCK_ASSERT(ifp);
3425 ifp = ifma->ifma_ifp;
3428 * If the ifnet is detaching, null out references to ifnet,
3429 * so that upper protocol layers will notice, and not attempt
3430 * to obtain locks for an ifnet which no longer exists. The
3431 * routing socket announcement must happen before the ifnet
3432 * instance is detached from the system.
3436 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3439 * ifp may already be nulled out if we are being reentered
3440 * to delete the ll_ifma.
3443 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3444 ifma->ifma_ifp = NULL;
3448 if (--ifma->ifma_refcount > 0)
3452 * If this ifma is a network-layer ifma, a link-layer ifma may
3453 * have been associated with it. Release it first if so.
3455 ll_ifma = ifma->ifma_llifma;
3456 if (ll_ifma != NULL) {
3457 KASSERT(ifma->ifma_lladdr != NULL,
3458 ("%s: llifma w/o lladdr", __func__));
3460 ll_ifma->ifma_ifp = NULL; /* XXX */
3461 if (--ll_ifma->ifma_refcount == 0) {
3463 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3466 if_freemulti(ll_ifma);
3471 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3476 * The last reference to this instance of struct ifmultiaddr
3477 * was released; the hardware should be notified of this change.
3483 * Set the link layer address on an interface.
3485 * At this time we only support certain types of interfaces,
3486 * and we don't allow the length of the address to change.
3489 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3491 struct sockaddr_dl *sdl;
3498 IF_ADDR_RUNLOCK(ifp);
3502 IF_ADDR_RUNLOCK(ifp);
3503 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3508 if (len != sdl->sdl_alen) { /* don't allow length to change */
3512 switch (ifp->if_type) {
3520 case IFT_IEEE8023ADLAG:
3522 bcopy(lladdr, LLADDR(sdl), len);
3531 * If the interface is already up, we need
3532 * to re-init it in order to reprogram its
3535 if ((ifp->if_flags & IFF_UP) != 0) {
3536 if (ifp->if_ioctl) {
3537 ifp->if_flags &= ~IFF_UP;
3538 ifr.ifr_flags = ifp->if_flags & 0xffff;
3539 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3540 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3541 ifp->if_flags |= IFF_UP;
3542 ifr.ifr_flags = ifp->if_flags & 0xffff;
3543 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3544 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3548 * Also send gratuitous ARPs to notify other nodes about
3549 * the address change.
3551 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3552 if (ifa->ifa_addr->sa_family == AF_INET)
3553 arp_ifinit(ifp, ifa);
3561 * The name argument must be a pointer to storage which will last as
3562 * long as the interface does. For physical devices, the result of
3563 * device_get_name(dev) is a good choice and for pseudo-devices a
3564 * static string works well.
3567 if_initname(struct ifnet *ifp, const char *name, int unit)
3569 ifp->if_dname = name;
3570 ifp->if_dunit = unit;
3571 if (unit != IF_DUNIT_NONE)
3572 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3574 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3578 if_printf(struct ifnet *ifp, const char * fmt, ...)
3583 retval = printf("%s: ", ifp->if_xname);
3585 retval += vprintf(fmt, ap);
3591 if_start(struct ifnet *ifp)
3594 (*(ifp)->if_start)(ifp);
3598 * Backwards compatibility interface for drivers
3599 * that have not implemented it
3602 if_transmit(struct ifnet *ifp, struct mbuf *m)
3606 IFQ_HANDOFF(ifp, m, error);
3611 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3618 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3623 if (_IF_QFULL(ifq)) {
3630 ifp->if_obytes += m->m_pkthdr.len + adjust;
3631 if (m->m_flags & (M_BCAST|M_MCAST))
3633 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3635 _IF_ENQUEUE(ifq, m);
3637 if (ifp != NULL && !active)
3638 (*(ifp)->if_start)(ifp);
3643 if_register_com_alloc(u_char type,
3644 if_com_alloc_t *a, if_com_free_t *f)
3647 KASSERT(if_com_alloc[type] == NULL,
3648 ("if_register_com_alloc: %d already registered", type));
3649 KASSERT(if_com_free[type] == NULL,
3650 ("if_register_com_alloc: %d free already registered", type));
3652 if_com_alloc[type] = a;
3653 if_com_free[type] = f;
3657 if_deregister_com_alloc(u_char type)
3660 KASSERT(if_com_alloc[type] != NULL,
3661 ("if_deregister_com_alloc: %d not registered", type));
3662 KASSERT(if_com_free[type] != NULL,
3663 ("if_deregister_com_alloc: %d free not registered", type));
3664 if_com_alloc[type] = NULL;
3665 if_com_free[type] = NULL;