2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
37 #include <sys/param.h>
38 #include <sys/types.h>
40 #include <sys/malloc.h>
44 #include <sys/systm.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.h>
52 #include <sys/refcount.h>
53 #include <sys/module.h>
54 #include <sys/rwlock.h>
55 #include <sys/sockio.h>
56 #include <sys/syslog.h>
57 #include <sys/sysctl.h>
58 #include <sys/taskqueue.h>
59 #include <sys/domain.h>
63 #include <machine/stdarg.h>
67 #include <net/ethernet.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_dl.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
74 #include <net/if_media.h>
75 #include <net/if_vlan_var.h>
76 #include <net/radix.h>
77 #include <net/route.h>
80 #if defined(INET) || defined(INET6)
81 #include <net/ethernet.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_carp.h>
87 #include <netinet/if_ether.h>
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
93 #endif /* INET || INET6 */
95 #include <security/mac/mac_framework.h>
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
108 /* Log link state change events */
109 static int log_link_state_change = 1;
111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
112 &log_link_state_change, 0,
113 "log interface link state change events");
115 /* Interface description */
116 static unsigned int ifdescr_maxlen = 1024;
117 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
119 "administrative maximum length for interface description");
121 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
123 /* global sx for non-critical path ifdescr */
124 static struct sx ifdescr_sx;
125 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
127 void (*bridge_linkstate_p)(struct ifnet *ifp);
128 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
129 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
130 /* These are external hooks for CARP. */
131 void (*carp_linkstate_p)(struct ifnet *ifp);
132 void (*carp_demote_adj_p)(int, char *);
133 int (*carp_master_p)(struct ifaddr *);
134 #if defined(INET) || defined(INET6)
135 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
136 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
137 const struct sockaddr *sa);
138 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
139 int (*carp_attach_p)(struct ifaddr *, int);
140 void (*carp_detach_p)(struct ifaddr *);
143 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
146 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
147 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
148 const struct in6_addr *taddr);
151 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
154 * XXX: Style; these should be sorted alphabetically, and unprototyped
155 * static functions should be prototyped. Currently they are sorted by
158 static void if_attachdomain(void *);
159 static void if_attachdomain1(struct ifnet *);
160 static int ifconf(u_long, caddr_t);
161 static void if_freemulti(struct ifmultiaddr *);
162 static void if_grow(void);
163 static void if_input_default(struct ifnet *, struct mbuf *);
164 static void if_route(struct ifnet *, int flag, int fam);
165 static int if_setflag(struct ifnet *, int, int, int *, int);
166 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
167 static void if_unroute(struct ifnet *, int flag, int fam);
168 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
169 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
170 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
171 static void do_link_state_change(void *, int);
172 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
173 static int if_getgroupmembers(struct ifgroupreq *);
174 static void if_delgroups(struct ifnet *);
175 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
176 static void if_detach_internal(struct ifnet *, int, struct if_clone **);
180 * XXX: declare here to avoid to include many inet6 related files..
181 * should be more generalized?
183 extern void nd6_setmtu(struct ifnet *);
186 /* ipsec helper hooks */
187 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
188 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
190 VNET_DEFINE(int, if_index);
191 int ifqmaxlen = IFQ_MAXLEN;
192 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
193 VNET_DEFINE(struct ifgrouphead, ifg_head);
195 static VNET_DEFINE(int, if_indexlim) = 8;
197 /* Table of ifnet by index. */
198 VNET_DEFINE(struct ifnet **, ifindex_table);
200 #define V_if_indexlim VNET(if_indexlim)
201 #define V_ifindex_table VNET(ifindex_table)
204 * The global network interface list (V_ifnet) and related state (such as
205 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
206 * an rwlock. Either may be acquired shared to stablize the list, but both
207 * must be acquired writable to modify the list. This model allows us to
208 * both stablize the interface list during interrupt thread processing, but
209 * also to stablize it over long-running ioctls, without introducing priority
210 * inversions and deadlocks.
212 struct rwlock ifnet_rwlock;
213 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
214 struct sx ifnet_sxlock;
215 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
218 * The allocation of network interfaces is a rather non-atomic affair; we
219 * need to select an index before we are ready to expose the interface for
220 * use, so will use this pointer value to indicate reservation.
222 #define IFNET_HOLD (void *)(uintptr_t)(-1)
224 static if_com_alloc_t *if_com_alloc[256];
225 static if_com_free_t *if_com_free[256];
227 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
228 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
229 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
232 ifnet_byindex_locked(u_short idx)
235 if (idx > V_if_index)
237 if (V_ifindex_table[idx] == IFNET_HOLD)
239 return (V_ifindex_table[idx]);
243 ifnet_byindex(u_short idx)
247 IFNET_RLOCK_NOSLEEP();
248 ifp = ifnet_byindex_locked(idx);
249 IFNET_RUNLOCK_NOSLEEP();
254 ifnet_byindex_ref(u_short idx)
258 IFNET_RLOCK_NOSLEEP();
259 ifp = ifnet_byindex_locked(idx);
260 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
261 IFNET_RUNLOCK_NOSLEEP();
265 IFNET_RUNLOCK_NOSLEEP();
270 * Allocate an ifindex array entry; return 0 on success or an error on
278 IFNET_WLOCK_ASSERT();
281 * Try to find an empty slot below V_if_index. If we fail, take the
284 for (idx = 1; idx <= V_if_index; idx++) {
285 if (V_ifindex_table[idx] == NULL)
289 /* Catch if_index overflow. */
290 if (idx >= V_if_indexlim) {
294 if (idx > V_if_index)
300 ifindex_free_locked(u_short idx)
303 IFNET_WLOCK_ASSERT();
305 V_ifindex_table[idx] = NULL;
306 while (V_if_index > 0 &&
307 V_ifindex_table[V_if_index] == NULL)
312 ifindex_free(u_short idx)
316 ifindex_free_locked(idx);
321 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
324 IFNET_WLOCK_ASSERT();
326 V_ifindex_table[idx] = ifp;
330 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
334 ifnet_setbyindex_locked(idx, ifp);
339 ifaddr_byindex(u_short idx)
342 struct ifaddr *ifa = NULL;
344 IFNET_RLOCK_NOSLEEP();
345 ifp = ifnet_byindex_locked(idx);
346 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
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 vnet_if_uninit(const void *unused __unused)
378 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
379 "not empty", __func__, __LINE__, &V_ifnet));
380 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
381 "not empty", __func__, __LINE__, &V_ifg_head));
383 free((caddr_t)V_ifindex_table, M_IFNET);
385 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
386 vnet_if_uninit, NULL);
396 IFNET_WLOCK_ASSERT();
397 oldlim = V_if_indexlim;
399 n = (oldlim << 1) * sizeof(*e);
400 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
402 if (V_if_indexlim != oldlim) {
406 if (V_ifindex_table != NULL) {
407 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
408 free((caddr_t)V_ifindex_table, M_IFNET);
415 * Allocate a struct ifnet and an index for an interface. A layer 2
416 * common structure will also be allocated if an allocation routine is
417 * registered for the passed type.
420 if_alloc(u_char type)
425 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
427 idx = ifindex_alloc();
428 ifnet_setbyindex_locked(idx, IFNET_HOLD);
432 ifp->if_alloctype = type;
433 if (if_com_alloc[type] != NULL) {
434 ifp->if_l2com = if_com_alloc[type](type, ifp);
435 if (ifp->if_l2com == NULL) {
442 IF_ADDR_LOCK_INIT(ifp);
443 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
444 ifp->if_afdata_initialized = 0;
445 IF_AFDATA_LOCK_INIT(ifp);
446 TAILQ_INIT(&ifp->if_addrhead);
447 TAILQ_INIT(&ifp->if_multiaddrs);
448 TAILQ_INIT(&ifp->if_groups);
452 ifq_init(&ifp->if_snd, ifp);
454 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
455 for (int i = 0; i < IFCOUNTERS; i++)
456 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
457 ifp->if_get_counter = if_get_counter_default;
458 ifnet_setbyindex(ifp->if_index, ifp);
463 * Do the actual work of freeing a struct ifnet, and layer 2 common
464 * structure. This call is made when the last reference to an
465 * interface is released.
468 if_free_internal(struct ifnet *ifp)
471 KASSERT((ifp->if_flags & IFF_DYING),
472 ("if_free_internal: interface not dying"));
474 if (if_com_free[ifp->if_alloctype] != NULL)
475 if_com_free[ifp->if_alloctype](ifp->if_l2com,
479 mac_ifnet_destroy(ifp);
481 if (ifp->if_description != NULL)
482 free(ifp->if_description, M_IFDESCR);
483 IF_AFDATA_DESTROY(ifp);
484 IF_ADDR_LOCK_DESTROY(ifp);
485 ifq_delete(&ifp->if_snd);
487 for (int i = 0; i < IFCOUNTERS; i++)
488 counter_u64_free(ifp->if_counters[i]);
494 * Deregister an interface and free the associated storage.
497 if_free(struct ifnet *ifp)
500 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
502 CURVNET_SET_QUIET(ifp->if_vnet);
504 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
505 ("%s: freeing unallocated ifnet", ifp->if_xname));
507 ifindex_free_locked(ifp->if_index);
510 if (refcount_release(&ifp->if_refcount))
511 if_free_internal(ifp);
516 * Interfaces to keep an ifnet type-stable despite the possibility of the
517 * driver calling if_free(). If there are additional references, we defer
518 * freeing the underlying data structure.
521 if_ref(struct ifnet *ifp)
524 /* We don't assert the ifnet list lock here, but arguably should. */
525 refcount_acquire(&ifp->if_refcount);
529 if_rele(struct ifnet *ifp)
532 if (!refcount_release(&ifp->if_refcount))
534 if_free_internal(ifp);
538 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
541 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
543 if (ifq->ifq_maxlen == 0)
544 ifq->ifq_maxlen = ifqmaxlen;
547 ifq->altq_disc = NULL;
548 ifq->altq_flags &= ALTQF_CANTCHANGE;
549 ifq->altq_tbr = NULL;
554 ifq_delete(struct ifaltq *ifq)
556 mtx_destroy(&ifq->ifq_mtx);
560 * Perform generic interface initalization tasks and attach the interface
561 * to the list of "active" interfaces. If vmove flag is set on entry
562 * to if_attach_internal(), perform only a limited subset of initialization
563 * tasks, given that we are moving from one vnet to another an ifnet which
564 * has already been fully initialized.
566 * Note that if_detach_internal() removes group membership unconditionally
567 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
568 * Thus, when if_vmove() is applied to a cloned interface, group membership
569 * is lost while a cloned one always joins a group whose name is
570 * ifc->ifc_name. To recover this after if_detach_internal() and
571 * if_attach_internal(), the cloner should be specified to
572 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
573 * attempts to join a group whose name is ifc->ifc_name.
576 * - The decision to return void and thus require this function to
577 * succeed is questionable.
578 * - We should probably do more sanity checking. For instance we don't
579 * do anything to insure if_xname is unique or non-empty.
582 if_attach(struct ifnet *ifp)
585 if_attach_internal(ifp, 0, NULL);
589 * Compute the least common TSO limit.
592 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
595 * 1) If there is no limit currently, take the limit from
596 * the network adapter.
598 * 2) If the network adapter has a limit below the current
601 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
602 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
603 pmax->tsomaxbytes = ifp->if_hw_tsomax;
605 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
606 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
607 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
609 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
610 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
611 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
616 * Update TSO limit of a network adapter.
618 * Returns zero if no change. Else non-zero.
621 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
624 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
625 ifp->if_hw_tsomax = pmax->tsomaxbytes;
628 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
629 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
632 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
633 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
640 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
642 unsigned socksize, ifasize;
643 int namelen, masklen;
644 struct sockaddr_dl *sdl;
647 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
648 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
652 ifp->if_vnet = curvnet;
653 if (ifp->if_home_vnet == NULL)
654 ifp->if_home_vnet = curvnet;
657 if_addgroup(ifp, IFG_ALL);
659 /* Restore group membership for cloned interfaces. */
660 if (vmove && ifc != NULL)
661 if_clone_addgroup(ifp, ifc);
663 getmicrotime(&ifp->if_lastchange);
664 ifp->if_epoch = time_uptime;
666 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
667 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
668 ("transmit and qflush must both either be set or both be NULL"));
669 if (ifp->if_transmit == NULL) {
670 ifp->if_transmit = if_transmit;
671 ifp->if_qflush = if_qflush;
673 if (ifp->if_input == NULL)
674 ifp->if_input = if_input_default;
678 mac_ifnet_create(ifp);
682 * Create a Link Level name for this device.
684 namelen = strlen(ifp->if_xname);
686 * Always save enough space for any possiable name so we
687 * can do a rename in place later.
689 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
690 socksize = masklen + ifp->if_addrlen;
691 if (socksize < sizeof(*sdl))
692 socksize = sizeof(*sdl);
693 socksize = roundup2(socksize, sizeof(long));
694 ifasize = sizeof(*ifa) + 2 * socksize;
695 ifa = ifa_alloc(ifasize, M_WAITOK);
696 sdl = (struct sockaddr_dl *)(ifa + 1);
697 sdl->sdl_len = socksize;
698 sdl->sdl_family = AF_LINK;
699 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
700 sdl->sdl_nlen = namelen;
701 sdl->sdl_index = ifp->if_index;
702 sdl->sdl_type = ifp->if_type;
705 ifa->ifa_rtrequest = link_rtrequest;
706 ifa->ifa_addr = (struct sockaddr *)sdl;
707 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
708 ifa->ifa_netmask = (struct sockaddr *)sdl;
709 sdl->sdl_len = masklen;
711 sdl->sdl_data[--namelen] = 0xff;
712 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
713 /* Reliably crash if used uninitialized. */
714 ifp->if_broadcastaddr = NULL;
716 #if defined(INET) || defined(INET6)
717 /* Use defaults for TSO, if nothing is set */
718 if (ifp->if_hw_tsomax == 0 &&
719 ifp->if_hw_tsomaxsegcount == 0 &&
720 ifp->if_hw_tsomaxsegsize == 0) {
722 * The TSO defaults needs to be such that an
723 * NFS mbuf list of 35 mbufs totalling just
724 * below 64K works and that a chain of mbufs
725 * can be defragged into at most 32 segments:
727 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
728 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
729 ifp->if_hw_tsomaxsegcount = 35;
730 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
732 /* XXX some drivers set IFCAP_TSO after ethernet attach */
733 if (ifp->if_capabilities & IFCAP_TSO) {
734 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
736 ifp->if_hw_tsomaxsegcount,
737 ifp->if_hw_tsomaxsegsize);
745 * Update the interface index in the link layer address
748 for (ifa = ifp->if_addr; ifa != NULL;
749 ifa = TAILQ_NEXT(ifa, ifa_link)) {
750 if (ifa->ifa_addr->sa_family == AF_LINK) {
751 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
752 sdl->sdl_index = ifp->if_index;
759 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
761 curvnet->vnet_ifcnt++;
765 if (domain_init_status >= 2)
766 if_attachdomain1(ifp);
768 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
769 if (IS_DEFAULT_VNET(curvnet))
770 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
772 /* Announce the interface. */
773 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
777 if_attachdomain(void *dummy)
781 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
782 if_attachdomain1(ifp);
784 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
785 if_attachdomain, NULL);
788 if_attachdomain1(struct ifnet *ifp)
793 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
794 * cannot lock ifp->if_afdata initialization, entirely.
796 if (IF_AFDATA_TRYLOCK(ifp) == 0)
798 if (ifp->if_afdata_initialized >= domain_init_status) {
799 IF_AFDATA_UNLOCK(ifp);
800 log(LOG_WARNING, "%s called more than once on %s\n",
801 __func__, ifp->if_xname);
804 ifp->if_afdata_initialized = domain_init_status;
805 IF_AFDATA_UNLOCK(ifp);
807 /* address family dependent data region */
808 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
809 for (dp = domains; dp; dp = dp->dom_next) {
810 if (dp->dom_ifattach)
811 ifp->if_afdata[dp->dom_family] =
812 (*dp->dom_ifattach)(ifp);
817 * Remove any unicast or broadcast network addresses from an interface.
820 if_purgeaddrs(struct ifnet *ifp)
822 struct ifaddr *ifa, *next;
824 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
825 if (ifa->ifa_addr->sa_family == AF_LINK)
828 /* XXX: Ugly!! ad hoc just for INET */
829 if (ifa->ifa_addr->sa_family == AF_INET) {
830 struct ifaliasreq ifr;
832 bzero(&ifr, sizeof(ifr));
833 ifr.ifra_addr = *ifa->ifa_addr;
834 if (ifa->ifa_dstaddr)
835 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
836 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
842 if (ifa->ifa_addr->sa_family == AF_INET6) {
844 /* ifp_addrhead is already updated */
848 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
854 * Remove any multicast network addresses from an interface when an ifnet
858 if_purgemaddrs(struct ifnet *ifp)
860 struct ifmultiaddr *ifma;
861 struct ifmultiaddr *next;
864 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
865 if_delmulti_locked(ifp, ifma, 1);
866 IF_ADDR_WUNLOCK(ifp);
870 * Detach an interface, removing it from the list of "active" interfaces.
871 * If vmove flag is set on entry to if_detach_internal(), perform only a
872 * limited subset of cleanup tasks, given that we are moving an ifnet from
873 * one vnet to another, where it must be fully operational.
875 * XXXRW: There are some significant questions about event ordering, and
876 * how to prevent things from starting to use the interface during detach.
879 if_detach(struct ifnet *ifp)
882 CURVNET_SET_QUIET(ifp->if_vnet);
883 if_detach_internal(ifp, 0, NULL);
888 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
897 TAILQ_FOREACH(iter, &V_ifnet, if_link)
899 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
905 curvnet->vnet_ifcnt--;
910 panic("%s: ifp=%p not on the ifnet tailq %p",
911 __func__, ifp, &V_ifnet);
913 return; /* XXX this should panic as well? */
916 /* Check if this is a cloned interface or not. */
917 if (vmove && ifcp != NULL)
918 *ifcp = if_clone_findifc(ifp);
921 * Remove/wait for pending events.
923 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
926 * Remove routes and flush queues.
930 if (ALTQ_IS_ENABLED(&ifp->if_snd))
931 altq_disable(&ifp->if_snd);
932 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
933 altq_detach(&ifp->if_snd);
944 * Remove all IPv6 kernel structs related to ifp. This should be done
945 * before removing routing entries below, since IPv6 interface direct
946 * routes are expected to be removed by the IPv6-specific kernel API.
947 * Otherwise, the kernel will detect some inconsistency and bark it.
953 /* Announce that the interface is gone. */
954 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
955 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
956 if (IS_DEFAULT_VNET(curvnet))
957 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
961 * Prevent further calls into the device driver via ifnet.
966 * Remove link ifaddr pointer and maybe decrement if_index.
967 * Clean up all addresses.
971 /* We can now free link ifaddr. */
972 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
973 ifa = TAILQ_FIRST(&ifp->if_addrhead);
974 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
979 rt_flushifroutes(ifp);
983 * We cannot hold the lock over dom_ifdetach calls as they might
984 * sleep, for example trying to drain a callout, thus open up the
985 * theoretical race with re-attaching.
988 i = ifp->if_afdata_initialized;
989 ifp->if_afdata_initialized = 0;
990 IF_AFDATA_UNLOCK(ifp);
991 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
992 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
993 (*dp->dom_ifdetach)(ifp,
994 ifp->if_afdata[dp->dom_family]);
1000 * if_vmove() performs a limited version of if_detach() in current
1001 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1002 * An attempt is made to shrink if_index in current vnet, find an
1003 * unused if_index in target vnet and calls if_grow() if necessary,
1004 * and finally find an unused if_xname for the target vnet.
1007 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1009 struct if_clone *ifc;
1012 * Detach from current vnet, but preserve LLADDR info, do not
1013 * mark as dead etc. so that the ifnet can be reattached later.
1015 if_detach_internal(ifp, 1, &ifc);
1018 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1019 * the if_index for that vnet if possible.
1021 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1022 * or we'd lock on one vnet and unlock on another.
1025 ifindex_free_locked(ifp->if_index);
1029 * Perform interface-specific reassignment tasks, if provided by
1032 if (ifp->if_reassign != NULL)
1033 ifp->if_reassign(ifp, new_vnet, NULL);
1036 * Switch to the context of the target vnet.
1038 CURVNET_SET_QUIET(new_vnet);
1041 ifp->if_index = ifindex_alloc();
1042 ifnet_setbyindex_locked(ifp->if_index, ifp);
1045 if_attach_internal(ifp, 1, ifc);
1051 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1054 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1059 /* Try to find the prison within our visibility. */
1060 sx_slock(&allprison_lock);
1061 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1062 sx_sunlock(&allprison_lock);
1065 prison_hold_locked(pr);
1066 mtx_unlock(&pr->pr_mtx);
1068 /* Do not try to move the iface from and to the same prison. */
1069 if (pr->pr_vnet == ifp->if_vnet) {
1074 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1075 /* XXX Lock interfaces to avoid races. */
1076 CURVNET_SET_QUIET(pr->pr_vnet);
1077 difp = ifunit(ifname);
1084 /* Move the interface into the child jail/vnet. */
1085 if_vmove(ifp, pr->pr_vnet);
1087 /* Report the new if_xname back to the userland. */
1088 sprintf(ifname, "%s", ifp->if_xname);
1095 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1098 struct vnet *vnet_dst;
1101 /* Try to find the prison within our visibility. */
1102 sx_slock(&allprison_lock);
1103 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1104 sx_sunlock(&allprison_lock);
1107 prison_hold_locked(pr);
1108 mtx_unlock(&pr->pr_mtx);
1110 /* Make sure the named iface exists in the source prison/vnet. */
1111 CURVNET_SET(pr->pr_vnet);
1112 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1119 /* Do not try to move the iface from and to the same prison. */
1120 vnet_dst = TD_TO_VNET(td);
1121 if (vnet_dst == ifp->if_vnet) {
1127 /* Get interface back from child jail/vnet. */
1128 if_vmove(ifp, vnet_dst);
1131 /* Report the new if_xname back to the userland. */
1132 sprintf(ifname, "%s", ifp->if_xname);
1140 * Add a group to an interface
1143 if_addgroup(struct ifnet *ifp, const char *groupname)
1145 struct ifg_list *ifgl;
1146 struct ifg_group *ifg = NULL;
1147 struct ifg_member *ifgm;
1150 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1151 groupname[strlen(groupname) - 1] <= '9')
1155 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1156 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1161 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1162 M_NOWAIT)) == NULL) {
1167 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1168 M_TEMP, M_NOWAIT)) == NULL) {
1174 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1175 if (!strcmp(ifg->ifg_group, groupname))
1179 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1180 M_TEMP, M_NOWAIT)) == NULL) {
1186 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1187 ifg->ifg_refcnt = 0;
1188 TAILQ_INIT(&ifg->ifg_members);
1189 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1194 ifgl->ifgl_group = ifg;
1195 ifgm->ifgm_ifp = ifp;
1198 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1199 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1200 IF_ADDR_WUNLOCK(ifp);
1205 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1206 EVENTHANDLER_INVOKE(group_change_event, groupname);
1212 * Remove a group from an interface
1215 if_delgroup(struct ifnet *ifp, const char *groupname)
1217 struct ifg_list *ifgl;
1218 struct ifg_member *ifgm;
1221 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1222 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1230 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1231 IF_ADDR_WUNLOCK(ifp);
1233 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1234 if (ifgm->ifgm_ifp == ifp)
1238 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1242 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1243 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1245 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1246 free(ifgl->ifgl_group, M_TEMP);
1252 EVENTHANDLER_INVOKE(group_change_event, groupname);
1258 * Remove an interface from all groups
1261 if_delgroups(struct ifnet *ifp)
1263 struct ifg_list *ifgl;
1264 struct ifg_member *ifgm;
1265 char groupname[IFNAMSIZ];
1268 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1269 ifgl = TAILQ_FIRST(&ifp->if_groups);
1271 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1274 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1275 IF_ADDR_WUNLOCK(ifp);
1277 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1278 if (ifgm->ifgm_ifp == ifp)
1282 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1287 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1288 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1290 EVENTHANDLER_INVOKE(group_detach_event,
1292 free(ifgl->ifgl_group, M_TEMP);
1298 EVENTHANDLER_INVOKE(group_change_event, groupname);
1306 * Stores all groups from an interface in memory pointed
1310 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1313 struct ifg_list *ifgl;
1314 struct ifg_req ifgrq, *ifgp;
1315 struct ifgroupreq *ifgr = data;
1317 if (ifgr->ifgr_len == 0) {
1319 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1320 ifgr->ifgr_len += sizeof(struct ifg_req);
1321 IF_ADDR_RUNLOCK(ifp);
1325 len = ifgr->ifgr_len;
1326 ifgp = ifgr->ifgr_groups;
1329 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1330 if (len < sizeof(ifgrq)) {
1331 IF_ADDR_RUNLOCK(ifp);
1334 bzero(&ifgrq, sizeof ifgrq);
1335 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1336 sizeof(ifgrq.ifgrq_group));
1337 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1338 IF_ADDR_RUNLOCK(ifp);
1341 len -= sizeof(ifgrq);
1344 IF_ADDR_RUNLOCK(ifp);
1350 * Stores all members of a group in memory pointed to by data
1353 if_getgroupmembers(struct ifgroupreq *data)
1355 struct ifgroupreq *ifgr = data;
1356 struct ifg_group *ifg;
1357 struct ifg_member *ifgm;
1358 struct ifg_req ifgrq, *ifgp;
1362 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1363 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1370 if (ifgr->ifgr_len == 0) {
1371 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1372 ifgr->ifgr_len += sizeof(ifgrq);
1377 len = ifgr->ifgr_len;
1378 ifgp = ifgr->ifgr_groups;
1379 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1380 if (len < sizeof(ifgrq)) {
1384 bzero(&ifgrq, sizeof ifgrq);
1385 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1386 sizeof(ifgrq.ifgrq_member));
1387 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1391 len -= sizeof(ifgrq);
1400 * Return counter values from counter(9)s stored in ifnet.
1403 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1406 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1408 return (counter_u64_fetch(ifp->if_counters[cnt]));
1412 * Increase an ifnet counter. Usually used for counters shared
1413 * between the stack and a driver, but function supports them all.
1416 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1419 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1421 counter_u64_add(ifp->if_counters[cnt], inc);
1425 * Copy data from ifnet to userland API structure if_data.
1428 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1431 ifd->ifi_type = ifp->if_type;
1432 ifd->ifi_physical = 0;
1433 ifd->ifi_addrlen = ifp->if_addrlen;
1434 ifd->ifi_hdrlen = ifp->if_hdrlen;
1435 ifd->ifi_link_state = ifp->if_link_state;
1437 ifd->ifi_datalen = sizeof(struct if_data);
1438 ifd->ifi_mtu = ifp->if_mtu;
1439 ifd->ifi_metric = ifp->if_metric;
1440 ifd->ifi_baudrate = ifp->if_baudrate;
1441 ifd->ifi_hwassist = ifp->if_hwassist;
1442 ifd->ifi_epoch = ifp->if_epoch;
1443 ifd->ifi_lastchange = ifp->if_lastchange;
1445 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1446 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1447 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1448 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1449 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1450 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1451 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1452 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1453 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1454 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1455 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1456 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1460 * Wrapper functions for struct ifnet address list locking macros. These are
1461 * used by kernel modules to avoid encoding programming interface or binary
1462 * interface assumptions that may be violated when kernel-internal locking
1463 * approaches change.
1466 if_addr_rlock(struct ifnet *ifp)
1473 if_addr_runlock(struct ifnet *ifp)
1476 IF_ADDR_RUNLOCK(ifp);
1480 if_maddr_rlock(if_t ifp)
1483 IF_ADDR_RLOCK((struct ifnet *)ifp);
1487 if_maddr_runlock(if_t ifp)
1490 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1494 * Initialization, destruction and refcounting functions for ifaddrs.
1497 ifa_alloc(size_t size, int flags)
1501 KASSERT(size >= sizeof(struct ifaddr),
1502 ("%s: invalid size %zu", __func__, size));
1504 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1508 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1510 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1512 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1514 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1517 refcount_init(&ifa->ifa_refcnt, 1);
1522 /* free(NULL) is okay */
1523 counter_u64_free(ifa->ifa_opackets);
1524 counter_u64_free(ifa->ifa_ipackets);
1525 counter_u64_free(ifa->ifa_obytes);
1526 counter_u64_free(ifa->ifa_ibytes);
1527 free(ifa, M_IFADDR);
1533 ifa_ref(struct ifaddr *ifa)
1536 refcount_acquire(&ifa->ifa_refcnt);
1540 ifa_free(struct ifaddr *ifa)
1543 if (refcount_release(&ifa->ifa_refcnt)) {
1544 counter_u64_free(ifa->ifa_opackets);
1545 counter_u64_free(ifa->ifa_ipackets);
1546 counter_u64_free(ifa->ifa_obytes);
1547 counter_u64_free(ifa->ifa_ibytes);
1548 free(ifa, M_IFADDR);
1553 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1554 struct sockaddr *ia)
1557 struct rt_addrinfo info;
1558 struct sockaddr_dl null_sdl;
1563 bzero(&info, sizeof(info));
1564 if (cmd != RTM_DELETE)
1565 info.rti_ifp = V_loif;
1566 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1567 info.rti_info[RTAX_DST] = ia;
1568 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1569 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1571 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1574 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1575 __func__, otype, if_name(ifp), error);
1581 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1584 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1588 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1591 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1595 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1598 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1602 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1603 * structs used to represent other address families, it is necessary
1604 * to perform a different comparison.
1607 #define sa_dl_equal(a1, a2) \
1608 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1609 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1610 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1611 CLLADDR((const struct sockaddr_dl *)(a2)), \
1612 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1615 * Locate an interface based on a complete address.
1618 static struct ifaddr *
1619 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref)
1624 IFNET_RLOCK_NOSLEEP();
1625 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1627 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1628 if (ifa->ifa_addr->sa_family != addr->sa_family)
1630 if (sa_equal(addr, ifa->ifa_addr)) {
1633 IF_ADDR_RUNLOCK(ifp);
1636 /* IP6 doesn't have broadcast */
1637 if ((ifp->if_flags & IFF_BROADCAST) &&
1638 ifa->ifa_broadaddr &&
1639 ifa->ifa_broadaddr->sa_len != 0 &&
1640 sa_equal(ifa->ifa_broadaddr, addr)) {
1643 IF_ADDR_RUNLOCK(ifp);
1647 IF_ADDR_RUNLOCK(ifp);
1651 IFNET_RUNLOCK_NOSLEEP();
1656 ifa_ifwithaddr(const struct sockaddr *addr)
1659 return (ifa_ifwithaddr_internal(addr, 1));
1663 ifa_ifwithaddr_check(const struct sockaddr *addr)
1666 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1670 * Locate an interface based on the broadcast address.
1674 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1679 IFNET_RLOCK_NOSLEEP();
1680 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1681 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1684 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1685 if (ifa->ifa_addr->sa_family != addr->sa_family)
1687 if ((ifp->if_flags & IFF_BROADCAST) &&
1688 ifa->ifa_broadaddr &&
1689 ifa->ifa_broadaddr->sa_len != 0 &&
1690 sa_equal(ifa->ifa_broadaddr, addr)) {
1692 IF_ADDR_RUNLOCK(ifp);
1696 IF_ADDR_RUNLOCK(ifp);
1700 IFNET_RUNLOCK_NOSLEEP();
1705 * Locate the point to point interface with a given destination address.
1709 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1714 IFNET_RLOCK_NOSLEEP();
1715 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1716 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1718 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1721 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1722 if (ifa->ifa_addr->sa_family != addr->sa_family)
1724 if (ifa->ifa_dstaddr != NULL &&
1725 sa_equal(addr, ifa->ifa_dstaddr)) {
1727 IF_ADDR_RUNLOCK(ifp);
1731 IF_ADDR_RUNLOCK(ifp);
1735 IFNET_RUNLOCK_NOSLEEP();
1740 * Find an interface on a specific network. If many, choice
1741 * is most specific found.
1744 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1748 struct ifaddr *ifa_maybe = NULL;
1749 u_int af = addr->sa_family;
1750 const char *addr_data = addr->sa_data, *cplim;
1753 * AF_LINK addresses can be looked up directly by their index number,
1754 * so do that if we can.
1756 if (af == AF_LINK) {
1757 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
1758 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1759 return (ifaddr_byindex(sdl->sdl_index));
1763 * Scan though each interface, looking for ones that have addresses
1764 * in this address family and the requested fib. Maintain a reference
1765 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1766 * kept it stable when we move onto the next interface.
1768 IFNET_RLOCK_NOSLEEP();
1769 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1770 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1773 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1774 const char *cp, *cp2, *cp3;
1776 if (ifa->ifa_addr->sa_family != af)
1778 if (af == AF_INET &&
1779 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1781 * This is a bit broken as it doesn't
1782 * take into account that the remote end may
1783 * be a single node in the network we are
1785 * The trouble is that we don't know the
1786 * netmask for the remote end.
1788 if (ifa->ifa_dstaddr != NULL &&
1789 sa_equal(addr, ifa->ifa_dstaddr)) {
1791 IF_ADDR_RUNLOCK(ifp);
1796 * Scan all the bits in the ifa's address.
1797 * If a bit dissagrees with what we are
1798 * looking for, mask it with the netmask
1799 * to see if it really matters.
1800 * (A byte at a time)
1802 if (ifa->ifa_netmask == 0)
1805 cp2 = ifa->ifa_addr->sa_data;
1806 cp3 = ifa->ifa_netmask->sa_data;
1807 cplim = ifa->ifa_netmask->sa_len
1808 + (char *)ifa->ifa_netmask;
1810 if ((*cp++ ^ *cp2++) & *cp3++)
1811 goto next; /* next address! */
1813 * If the netmask of what we just found
1814 * is more specific than what we had before
1815 * (if we had one), or if the virtual status
1816 * of new prefix is better than of the old one,
1817 * then remember the new one before continuing
1818 * to search for an even better one.
1820 if (ifa_maybe == NULL ||
1821 ifa_preferred(ifa_maybe, ifa) ||
1822 rn_refines((caddr_t)ifa->ifa_netmask,
1823 (caddr_t)ifa_maybe->ifa_netmask)) {
1824 if (ifa_maybe != NULL)
1825 ifa_free(ifa_maybe);
1831 IF_ADDR_RUNLOCK(ifp);
1836 IFNET_RUNLOCK_NOSLEEP();
1837 if (ifa_maybe != NULL)
1838 ifa_free(ifa_maybe);
1843 * Find an interface address specific to an interface best matching
1847 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1850 const char *cp, *cp2, *cp3;
1852 struct ifaddr *ifa_maybe = NULL;
1853 u_int af = addr->sa_family;
1858 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1859 if (ifa->ifa_addr->sa_family != af)
1861 if (ifa_maybe == NULL)
1863 if (ifa->ifa_netmask == 0) {
1864 if (sa_equal(addr, ifa->ifa_addr) ||
1865 (ifa->ifa_dstaddr &&
1866 sa_equal(addr, ifa->ifa_dstaddr)))
1870 if (ifp->if_flags & IFF_POINTOPOINT) {
1871 if (sa_equal(addr, ifa->ifa_dstaddr))
1875 cp2 = ifa->ifa_addr->sa_data;
1876 cp3 = ifa->ifa_netmask->sa_data;
1877 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1878 for (; cp3 < cplim; cp3++)
1879 if ((*cp++ ^ *cp2++) & *cp3)
1889 IF_ADDR_RUNLOCK(ifp);
1894 * See whether new ifa is better than current one:
1895 * 1) A non-virtual one is preferred over virtual.
1896 * 2) A virtual in master state preferred over any other state.
1898 * Used in several address selecting functions.
1901 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
1904 return (cur->ifa_carp && (!next->ifa_carp ||
1905 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
1908 #include <net/if_llatbl.h>
1911 * Default action when installing a route with a Link Level gateway.
1912 * Lookup an appropriate real ifa to point to.
1913 * This should be moved to /sys/net/link.c eventually.
1916 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
1918 struct ifaddr *ifa, *oifa;
1919 struct sockaddr *dst;
1922 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
1923 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
1925 ifa = ifaof_ifpforaddr(dst, ifp);
1930 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1931 ifa->ifa_rtrequest(cmd, rt, info);
1935 struct sockaddr_dl *
1936 link_alloc_sdl(size_t size, int flags)
1939 return (malloc(size, M_TEMP, flags));
1943 link_free_sdl(struct sockaddr *sa)
1949 * Fills in given sdl with interface basic info.
1950 * Returns pointer to filled sdl.
1952 struct sockaddr_dl *
1953 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
1955 struct sockaddr_dl *sdl;
1957 sdl = (struct sockaddr_dl *)paddr;
1958 memset(sdl, 0, sizeof(struct sockaddr_dl));
1959 sdl->sdl_len = sizeof(struct sockaddr_dl);
1960 sdl->sdl_family = AF_LINK;
1961 sdl->sdl_index = ifp->if_index;
1962 sdl->sdl_type = iftype;
1968 * Mark an interface down and notify protocols of
1972 if_unroute(struct ifnet *ifp, int flag, int fam)
1976 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
1978 ifp->if_flags &= ~flag;
1979 getmicrotime(&ifp->if_lastchange);
1980 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1981 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1982 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1983 ifp->if_qflush(ifp);
1986 (*carp_linkstate_p)(ifp);
1991 * Mark an interface up and notify protocols of
1995 if_route(struct ifnet *ifp, int flag, int fam)
1999 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2001 ifp->if_flags |= flag;
2002 getmicrotime(&ifp->if_lastchange);
2003 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2004 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2005 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2007 (*carp_linkstate_p)(ifp);
2014 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2015 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2016 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2017 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2018 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2019 int (*vlan_setcookie_p)(struct ifnet *, void *);
2020 void *(*vlan_cookie_p)(struct ifnet *);
2023 * Handle a change in the interface link state. To avoid LORs
2024 * between driver lock and upper layer locks, as well as possible
2025 * recursions, we post event to taskqueue, and all job
2026 * is done in static do_link_state_change().
2029 if_link_state_change(struct ifnet *ifp, int link_state)
2031 /* Return if state hasn't changed. */
2032 if (ifp->if_link_state == link_state)
2035 ifp->if_link_state = link_state;
2037 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2041 do_link_state_change(void *arg, int pending)
2043 struct ifnet *ifp = (struct ifnet *)arg;
2044 int link_state = ifp->if_link_state;
2045 CURVNET_SET(ifp->if_vnet);
2047 /* Notify that the link state has changed. */
2049 if (ifp->if_vlantrunk != NULL)
2050 (*vlan_link_state_p)(ifp);
2052 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2053 ifp->if_l2com != NULL)
2054 (*ng_ether_link_state_p)(ifp, link_state);
2056 (*carp_linkstate_p)(ifp);
2058 (*bridge_linkstate_p)(ifp);
2060 (*lagg_linkstate_p)(ifp, link_state);
2062 if (IS_DEFAULT_VNET(curvnet))
2063 devctl_notify("IFNET", ifp->if_xname,
2064 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2067 if_printf(ifp, "%d link states coalesced\n", pending);
2068 if (log_link_state_change)
2069 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2070 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2071 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2076 * Mark an interface down and notify protocols of
2080 if_down(struct ifnet *ifp)
2083 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2087 * Mark an interface up and notify protocols of
2091 if_up(struct ifnet *ifp)
2094 if_route(ifp, IFF_UP, AF_UNSPEC);
2098 * Flush an interface queue.
2101 if_qflush(struct ifnet *ifp)
2109 if (ALTQ_IS_ENABLED(ifq))
2113 while ((m = n) != 0) {
2124 * Map interface name to interface structure pointer, with or without
2125 * returning a reference.
2128 ifunit_ref(const char *name)
2132 IFNET_RLOCK_NOSLEEP();
2133 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2134 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2135 !(ifp->if_flags & IFF_DYING))
2140 IFNET_RUNLOCK_NOSLEEP();
2145 ifunit(const char *name)
2149 IFNET_RLOCK_NOSLEEP();
2150 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2151 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2154 IFNET_RUNLOCK_NOSLEEP();
2159 * Hardware specific interface ioctls.
2162 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2166 int new_flags, temp_flags;
2167 size_t namelen, onamelen;
2169 char *descrbuf, *odescrbuf;
2170 char new_name[IFNAMSIZ];
2172 struct sockaddr_dl *sdl;
2174 ifr = (struct ifreq *)data;
2177 ifr->ifr_index = ifp->if_index;
2181 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2182 ifr->ifr_flags = temp_flags & 0xffff;
2183 ifr->ifr_flagshigh = temp_flags >> 16;
2187 ifr->ifr_reqcap = ifp->if_capabilities;
2188 ifr->ifr_curcap = ifp->if_capenable;
2193 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2198 ifr->ifr_metric = ifp->if_metric;
2202 ifr->ifr_mtu = ifp->if_mtu;
2206 /* XXXGL: did this ever worked? */
2212 sx_slock(&ifdescr_sx);
2213 if (ifp->if_description == NULL)
2216 /* space for terminating nul */
2217 descrlen = strlen(ifp->if_description) + 1;
2218 if (ifr->ifr_buffer.length < descrlen)
2219 ifr->ifr_buffer.buffer = NULL;
2221 error = copyout(ifp->if_description,
2222 ifr->ifr_buffer.buffer, descrlen);
2223 ifr->ifr_buffer.length = descrlen;
2225 sx_sunlock(&ifdescr_sx);
2229 error = priv_check(td, PRIV_NET_SETIFDESCR);
2234 * Copy only (length-1) bytes to make sure that
2235 * if_description is always nul terminated. The
2236 * length parameter is supposed to count the
2237 * terminating nul in.
2239 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2240 return (ENAMETOOLONG);
2241 else if (ifr->ifr_buffer.length == 0)
2244 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2246 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2247 ifr->ifr_buffer.length - 1);
2249 free(descrbuf, M_IFDESCR);
2254 sx_xlock(&ifdescr_sx);
2255 odescrbuf = ifp->if_description;
2256 ifp->if_description = descrbuf;
2257 sx_xunlock(&ifdescr_sx);
2259 getmicrotime(&ifp->if_lastchange);
2260 free(odescrbuf, M_IFDESCR);
2264 ifr->ifr_fib = ifp->if_fib;
2268 error = priv_check(td, PRIV_NET_SETIFFIB);
2271 if (ifr->ifr_fib >= rt_numfibs)
2274 ifp->if_fib = ifr->ifr_fib;
2278 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2282 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2283 * check, so we don't need special handling here yet.
2285 new_flags = (ifr->ifr_flags & 0xffff) |
2286 (ifr->ifr_flagshigh << 16);
2287 if (ifp->if_flags & IFF_UP &&
2288 (new_flags & IFF_UP) == 0) {
2290 } else if (new_flags & IFF_UP &&
2291 (ifp->if_flags & IFF_UP) == 0) {
2294 /* See if permanently promiscuous mode bit is about to flip */
2295 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2296 if (new_flags & IFF_PPROMISC)
2297 ifp->if_flags |= IFF_PROMISC;
2298 else if (ifp->if_pcount == 0)
2299 ifp->if_flags &= ~IFF_PROMISC;
2300 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2302 (new_flags & IFF_PPROMISC) ? "enabled" : "disabled");
2304 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2305 (new_flags &~ IFF_CANTCHANGE);
2306 if (ifp->if_ioctl) {
2307 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2309 getmicrotime(&ifp->if_lastchange);
2313 error = priv_check(td, PRIV_NET_SETIFCAP);
2316 if (ifp->if_ioctl == NULL)
2317 return (EOPNOTSUPP);
2318 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2320 error = (*ifp->if_ioctl)(ifp, cmd, data);
2322 getmicrotime(&ifp->if_lastchange);
2327 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2332 error = priv_check(td, PRIV_NET_SETIFNAME);
2335 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2338 if (new_name[0] == '\0')
2340 if (ifunit(new_name) != NULL)
2344 * XXX: Locking. Nothing else seems to lock if_flags,
2345 * and there are numerous other races with the
2346 * ifunit() checks not being atomic with namespace
2347 * changes (renames, vmoves, if_attach, etc).
2349 ifp->if_flags |= IFF_RENAMING;
2351 /* Announce the departure of the interface. */
2352 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2353 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2355 log(LOG_INFO, "%s: changing name to '%s'\n",
2356 ifp->if_xname, new_name);
2359 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2361 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2362 namelen = strlen(new_name);
2363 onamelen = sdl->sdl_nlen;
2365 * Move the address if needed. This is safe because we
2366 * allocate space for a name of length IFNAMSIZ when we
2367 * create this in if_attach().
2369 if (namelen != onamelen) {
2370 bcopy(sdl->sdl_data + onamelen,
2371 sdl->sdl_data + namelen, sdl->sdl_alen);
2373 bcopy(new_name, sdl->sdl_data, namelen);
2374 sdl->sdl_nlen = namelen;
2375 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2376 bzero(sdl->sdl_data, onamelen);
2377 while (namelen != 0)
2378 sdl->sdl_data[--namelen] = 0xff;
2379 IF_ADDR_WUNLOCK(ifp);
2381 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2382 /* Announce the return of the interface. */
2383 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2385 ifp->if_flags &= ~IFF_RENAMING;
2390 error = priv_check(td, PRIV_NET_SETIFVNET);
2393 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2398 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2401 ifp->if_metric = ifr->ifr_metric;
2402 getmicrotime(&ifp->if_lastchange);
2406 error = priv_check(td, PRIV_NET_SETIFPHYS);
2409 if (ifp->if_ioctl == NULL)
2410 return (EOPNOTSUPP);
2411 error = (*ifp->if_ioctl)(ifp, cmd, data);
2413 getmicrotime(&ifp->if_lastchange);
2418 u_long oldmtu = ifp->if_mtu;
2420 error = priv_check(td, PRIV_NET_SETIFMTU);
2423 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2425 if (ifp->if_ioctl == NULL)
2426 return (EOPNOTSUPP);
2427 error = (*ifp->if_ioctl)(ifp, cmd, data);
2429 getmicrotime(&ifp->if_lastchange);
2433 * If the link MTU changed, do network layer specific procedure.
2435 if (ifp->if_mtu != oldmtu) {
2446 if (cmd == SIOCADDMULTI)
2447 error = priv_check(td, PRIV_NET_ADDMULTI);
2449 error = priv_check(td, PRIV_NET_DELMULTI);
2453 /* Don't allow group membership on non-multicast interfaces. */
2454 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2455 return (EOPNOTSUPP);
2457 /* Don't let users screw up protocols' entries. */
2458 if (ifr->ifr_addr.sa_family != AF_LINK)
2461 if (cmd == SIOCADDMULTI) {
2462 struct ifmultiaddr *ifma;
2465 * Userland is only permitted to join groups once
2466 * via the if_addmulti() KPI, because it cannot hold
2467 * struct ifmultiaddr * between calls. It may also
2468 * lose a race while we check if the membership
2472 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2473 IF_ADDR_RUNLOCK(ifp);
2477 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2479 error = if_delmulti(ifp, &ifr->ifr_addr);
2482 getmicrotime(&ifp->if_lastchange);
2485 case SIOCSIFPHYADDR:
2486 case SIOCDIFPHYADDR:
2488 case SIOCSIFPHYADDR_IN6:
2491 case SIOCSIFGENERIC:
2492 error = priv_check(td, PRIV_NET_HWIOCTL);
2495 if (ifp->if_ioctl == NULL)
2496 return (EOPNOTSUPP);
2497 error = (*ifp->if_ioctl)(ifp, cmd, data);
2499 getmicrotime(&ifp->if_lastchange);
2503 case SIOCGIFPSRCADDR:
2504 case SIOCGIFPDSTADDR:
2507 case SIOCGIFGENERIC:
2508 if (ifp->if_ioctl == NULL)
2509 return (EOPNOTSUPP);
2510 error = (*ifp->if_ioctl)(ifp, cmd, data);
2514 error = priv_check(td, PRIV_NET_SETLLADDR);
2517 error = if_setlladdr(ifp,
2518 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2523 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2525 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2528 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2534 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2540 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2542 error = priv_check(td, PRIV_NET_DELIFGROUP);
2545 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2557 #ifdef COMPAT_FREEBSD32
2565 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2572 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2579 CURVNET_SET(so->so_vnet);
2582 error = ifconf(cmd, data);
2586 #ifdef COMPAT_FREEBSD32
2589 struct ifconf32 *ifc32;
2592 ifc32 = (struct ifconf32 *)data;
2593 ifc.ifc_len = ifc32->ifc_len;
2594 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2596 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2599 ifc32->ifc_len = ifc.ifc_len;
2604 ifr = (struct ifreq *)data;
2609 error = priv_check(td, PRIV_NET_SETIFVNET);
2611 error = if_vmove_reclaim(td, ifr->ifr_name,
2618 error = priv_check(td, PRIV_NET_IFCREATE);
2620 error = if_clone_create(ifr->ifr_name,
2621 sizeof(ifr->ifr_name),
2622 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2626 error = priv_check(td, PRIV_NET_IFDESTROY);
2628 error = if_clone_destroy(ifr->ifr_name);
2632 case SIOCIFGCLONERS:
2633 error = if_clone_list((struct if_clonereq *)data);
2637 error = if_getgroupmembers((struct ifgroupreq *)data);
2640 #if defined(INET) || defined(INET6)
2643 if (carp_ioctl_p == NULL)
2644 error = EPROTONOSUPPORT;
2646 error = (*carp_ioctl_p)(ifr, cmd, td);
2652 ifp = ifunit_ref(ifr->ifr_name);
2658 error = ifhwioctl(cmd, ifp, data, td);
2659 if (error != ENOIOCTL) {
2665 oif_flags = ifp->if_flags;
2666 if (so->so_proto == NULL) {
2669 return (EOPNOTSUPP);
2673 * Pass the request on to the socket control method, and if the
2674 * latter returns EOPNOTSUPP, directly to the interface.
2676 * Make an exception for the legacy SIOCSIF* requests. Drivers
2677 * trust SIOCSIFADDR et al to come from an already privileged
2678 * layer, and do not perform any credentials checks or input
2681 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2683 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2684 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2685 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2686 error = (*ifp->if_ioctl)(ifp, cmd, data);
2688 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2690 if (ifp->if_flags & IFF_UP)
2700 * The code common to handling reference counted flags,
2701 * e.g., in ifpromisc() and if_allmulti().
2702 * The "pflag" argument can specify a permanent mode flag to check,
2703 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2705 * Only to be used on stack-owned flags, not driver-owned flags.
2708 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2712 int oldflags, oldcount;
2714 /* Sanity checks to catch programming errors */
2715 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2716 ("%s: setting driver-owned flag %d", __func__, flag));
2719 KASSERT(*refcount >= 0,
2720 ("%s: increment negative refcount %d for flag %d",
2721 __func__, *refcount, flag));
2723 KASSERT(*refcount > 0,
2724 ("%s: decrement non-positive refcount %d for flag %d",
2725 __func__, *refcount, flag));
2727 /* In case this mode is permanent, just touch refcount */
2728 if (ifp->if_flags & pflag) {
2729 *refcount += onswitch ? 1 : -1;
2733 /* Save ifnet parameters for if_ioctl() may fail */
2734 oldcount = *refcount;
2735 oldflags = ifp->if_flags;
2738 * See if we aren't the only and touching refcount is enough.
2739 * Actually toggle interface flag if we are the first or last.
2744 ifp->if_flags |= flag;
2748 ifp->if_flags &= ~flag;
2751 /* Call down the driver since we've changed interface flags */
2752 if (ifp->if_ioctl == NULL) {
2756 ifr.ifr_flags = ifp->if_flags & 0xffff;
2757 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2758 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2761 /* Notify userland that interface flags have changed */
2766 /* Recover after driver error */
2767 *refcount = oldcount;
2768 ifp->if_flags = oldflags;
2773 * Set/clear promiscuous mode on interface ifp based on the truth value
2774 * of pswitch. The calls are reference counted so that only the first
2775 * "on" request actually has an effect, as does the final "off" request.
2776 * Results are undefined if the "off" and "on" requests are not matched.
2779 ifpromisc(struct ifnet *ifp, int pswitch)
2782 int oldflags = ifp->if_flags;
2784 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2785 &ifp->if_pcount, pswitch);
2786 /* If promiscuous mode status has changed, log a message */
2787 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
2788 log(LOG_INFO, "%s: promiscuous mode %s\n",
2790 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2795 * Return interface configuration
2796 * of system. List may be used
2797 * in later ioctl's (above) to get
2798 * other information.
2802 ifconf(u_long cmd, caddr_t data)
2804 struct ifconf *ifc = (struct ifconf *)data;
2809 int error, full = 0, valid_len, max_len;
2811 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2812 max_len = MAXPHYS - 1;
2814 /* Prevent hostile input from being able to crash the system */
2815 if (ifc->ifc_len <= 0)
2819 if (ifc->ifc_len <= max_len) {
2820 max_len = ifc->ifc_len;
2823 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2828 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2832 * Zero the ifr_name buffer to make sure we don't
2833 * disclose the contents of the stack.
2835 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2837 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2838 >= sizeof(ifr.ifr_name)) {
2841 return (ENAMETOOLONG);
2846 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2847 struct sockaddr *sa = ifa->ifa_addr;
2849 if (prison_if(curthread->td_ucred, sa) != 0)
2852 if (sa->sa_len <= sizeof(*sa)) {
2854 sbuf_bcat(sb, &ifr, sizeof(ifr));
2855 max_len += sizeof(ifr);
2858 offsetof(struct ifreq, ifr_addr));
2859 max_len += offsetof(struct ifreq, ifr_addr);
2860 sbuf_bcat(sb, sa, sa->sa_len);
2861 max_len += sa->sa_len;
2864 if (sbuf_error(sb) == 0)
2865 valid_len = sbuf_len(sb);
2867 IF_ADDR_RUNLOCK(ifp);
2869 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
2870 sbuf_bcat(sb, &ifr, sizeof(ifr));
2871 max_len += sizeof(ifr);
2873 if (sbuf_error(sb) == 0)
2874 valid_len = sbuf_len(sb);
2880 * If we didn't allocate enough space (uncommon), try again. If
2881 * we have already allocated as much space as we are allowed,
2882 * return what we've got.
2884 if (valid_len != max_len && !full) {
2889 ifc->ifc_len = valid_len;
2891 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
2897 * Just like ifpromisc(), but for all-multicast-reception mode.
2900 if_allmulti(struct ifnet *ifp, int onswitch)
2903 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
2906 struct ifmultiaddr *
2907 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
2909 struct ifmultiaddr *ifma;
2911 IF_ADDR_LOCK_ASSERT(ifp);
2913 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2914 if (sa->sa_family == AF_LINK) {
2915 if (sa_dl_equal(ifma->ifma_addr, sa))
2918 if (sa_equal(ifma->ifma_addr, sa))
2927 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
2928 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
2929 * the ifnet multicast address list here, so the caller must do that and
2930 * other setup work (such as notifying the device driver). The reference
2931 * count is initialized to 1.
2933 static struct ifmultiaddr *
2934 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
2937 struct ifmultiaddr *ifma;
2938 struct sockaddr *dupsa;
2940 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
2945 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
2946 if (dupsa == NULL) {
2947 free(ifma, M_IFMADDR);
2950 bcopy(sa, dupsa, sa->sa_len);
2951 ifma->ifma_addr = dupsa;
2953 ifma->ifma_ifp = ifp;
2954 ifma->ifma_refcount = 1;
2955 ifma->ifma_protospec = NULL;
2958 ifma->ifma_lladdr = NULL;
2962 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
2963 if (dupsa == NULL) {
2964 free(ifma->ifma_addr, M_IFMADDR);
2965 free(ifma, M_IFMADDR);
2968 bcopy(llsa, dupsa, llsa->sa_len);
2969 ifma->ifma_lladdr = dupsa;
2975 * if_freemulti: free ifmultiaddr structure and possibly attached related
2976 * addresses. The caller is responsible for implementing reference
2977 * counting, notifying the driver, handling routing messages, and releasing
2978 * any dependent link layer state.
2981 if_freemulti(struct ifmultiaddr *ifma)
2984 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
2985 ifma->ifma_refcount));
2987 if (ifma->ifma_lladdr != NULL)
2988 free(ifma->ifma_lladdr, M_IFMADDR);
2989 free(ifma->ifma_addr, M_IFMADDR);
2990 free(ifma, M_IFMADDR);
2994 * Register an additional multicast address with a network interface.
2996 * - If the address is already present, bump the reference count on the
2997 * address and return.
2998 * - If the address is not link-layer, look up a link layer address.
2999 * - Allocate address structures for one or both addresses, and attach to the
3000 * multicast address list on the interface. If automatically adding a link
3001 * layer address, the protocol address will own a reference to the link
3002 * layer address, to be freed when it is freed.
3003 * - Notify the network device driver of an addition to the multicast address
3006 * 'sa' points to caller-owned memory with the desired multicast address.
3008 * 'retifma' will be used to return a pointer to the resulting multicast
3009 * address reference, if desired.
3012 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3013 struct ifmultiaddr **retifma)
3015 struct ifmultiaddr *ifma, *ll_ifma;
3016 struct sockaddr *llsa;
3017 struct sockaddr_dl sdl;
3021 * If the address is already present, return a new reference to it;
3022 * otherwise, allocate storage and set up a new address.
3025 ifma = if_findmulti(ifp, sa);
3027 ifma->ifma_refcount++;
3028 if (retifma != NULL)
3030 IF_ADDR_WUNLOCK(ifp);
3035 * The address isn't already present; resolve the protocol address
3036 * into a link layer address, and then look that up, bump its
3037 * refcount or allocate an ifma for that also.
3038 * Most link layer resolving functions returns address data which
3039 * fits inside default sockaddr_dl structure. However callback
3040 * can allocate another sockaddr structure, in that case we need to
3045 if (ifp->if_resolvemulti != NULL) {
3046 /* Provide called function with buffer size information */
3047 sdl.sdl_len = sizeof(sdl);
3048 llsa = (struct sockaddr *)&sdl;
3049 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3055 * Allocate the new address. Don't hook it up yet, as we may also
3056 * need to allocate a link layer multicast address.
3058 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3065 * If a link layer address is found, we'll need to see if it's
3066 * already present in the address list, or allocate is as well.
3067 * When this block finishes, the link layer address will be on the
3071 ll_ifma = if_findmulti(ifp, llsa);
3072 if (ll_ifma == NULL) {
3073 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3074 if (ll_ifma == NULL) {
3075 --ifma->ifma_refcount;
3080 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3083 ll_ifma->ifma_refcount++;
3084 ifma->ifma_llifma = ll_ifma;
3088 * We now have a new multicast address, ifma, and possibly a new or
3089 * referenced link layer address. Add the primary address to the
3090 * ifnet address list.
3092 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3094 if (retifma != NULL)
3098 * Must generate the message while holding the lock so that 'ifma'
3099 * pointer is still valid.
3101 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3102 IF_ADDR_WUNLOCK(ifp);
3105 * We are certain we have added something, so call down to the
3106 * interface to let them know about it.
3108 if (ifp->if_ioctl != NULL) {
3109 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3112 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3113 link_free_sdl(llsa);
3118 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3119 link_free_sdl(llsa);
3122 IF_ADDR_WUNLOCK(ifp);
3127 * Delete a multicast group membership by network-layer group address.
3129 * Returns ENOENT if the entry could not be found. If ifp no longer
3130 * exists, results are undefined. This entry point should only be used
3131 * from subsystems which do appropriate locking to hold ifp for the
3132 * duration of the call.
3133 * Network-layer protocol domains must use if_delmulti_ifma().
3136 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3138 struct ifmultiaddr *ifma;
3143 IFNET_RLOCK_NOSLEEP();
3144 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3149 IFNET_RUNLOCK_NOSLEEP();
3151 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3158 ifma = if_findmulti(ifp, sa);
3160 lastref = if_delmulti_locked(ifp, ifma, 0);
3161 IF_ADDR_WUNLOCK(ifp);
3166 if (lastref && ifp->if_ioctl != NULL) {
3167 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3174 * Delete all multicast group membership for an interface.
3175 * Should be used to quickly flush all multicast filters.
3178 if_delallmulti(struct ifnet *ifp)
3180 struct ifmultiaddr *ifma;
3181 struct ifmultiaddr *next;
3184 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3185 if_delmulti_locked(ifp, ifma, 0);
3186 IF_ADDR_WUNLOCK(ifp);
3190 * Delete a multicast group membership by group membership pointer.
3191 * Network-layer protocol domains must use this routine.
3193 * It is safe to call this routine if the ifp disappeared.
3196 if_delmulti_ifma(struct ifmultiaddr *ifma)
3201 ifp = ifma->ifma_ifp;
3204 printf("%s: ifma_ifp seems to be detached\n", __func__);
3208 IFNET_RLOCK_NOSLEEP();
3209 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3213 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3216 IFNET_RUNLOCK_NOSLEEP();
3220 * If and only if the ifnet instance exists: Acquire the address lock.
3225 lastref = if_delmulti_locked(ifp, ifma, 0);
3229 * If and only if the ifnet instance exists:
3230 * Release the address lock.
3231 * If the group was left: update the hardware hash filter.
3233 IF_ADDR_WUNLOCK(ifp);
3234 if (lastref && ifp->if_ioctl != NULL) {
3235 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3241 * Perform deletion of network-layer and/or link-layer multicast address.
3243 * Return 0 if the reference count was decremented.
3244 * Return 1 if the final reference was released, indicating that the
3245 * hardware hash filter should be reprogrammed.
3248 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3250 struct ifmultiaddr *ll_ifma;
3252 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3253 KASSERT(ifma->ifma_ifp == ifp,
3254 ("%s: inconsistent ifp %p", __func__, ifp));
3255 IF_ADDR_WLOCK_ASSERT(ifp);
3258 ifp = ifma->ifma_ifp;
3261 * If the ifnet is detaching, null out references to ifnet,
3262 * so that upper protocol layers will notice, and not attempt
3263 * to obtain locks for an ifnet which no longer exists. The
3264 * routing socket announcement must happen before the ifnet
3265 * instance is detached from the system.
3269 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3272 * ifp may already be nulled out if we are being reentered
3273 * to delete the ll_ifma.
3276 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3277 ifma->ifma_ifp = NULL;
3281 if (--ifma->ifma_refcount > 0)
3285 * If this ifma is a network-layer ifma, a link-layer ifma may
3286 * have been associated with it. Release it first if so.
3288 ll_ifma = ifma->ifma_llifma;
3289 if (ll_ifma != NULL) {
3290 KASSERT(ifma->ifma_lladdr != NULL,
3291 ("%s: llifma w/o lladdr", __func__));
3293 ll_ifma->ifma_ifp = NULL; /* XXX */
3294 if (--ll_ifma->ifma_refcount == 0) {
3296 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3299 if_freemulti(ll_ifma);
3304 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3309 * The last reference to this instance of struct ifmultiaddr
3310 * was released; the hardware should be notified of this change.
3316 * Set the link layer address on an interface.
3318 * At this time we only support certain types of interfaces,
3319 * and we don't allow the length of the address to change.
3321 * Set noinline to be dtrace-friendly
3324 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3326 struct sockaddr_dl *sdl;
3333 IF_ADDR_RUNLOCK(ifp);
3337 IF_ADDR_RUNLOCK(ifp);
3338 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3343 if (len != sdl->sdl_alen) { /* don't allow length to change */
3347 switch (ifp->if_type) {
3355 case IFT_IEEE8023ADLAG:
3357 bcopy(lladdr, LLADDR(sdl), len);
3366 * If the interface is already up, we need
3367 * to re-init it in order to reprogram its
3370 if ((ifp->if_flags & IFF_UP) != 0) {
3371 if (ifp->if_ioctl) {
3372 ifp->if_flags &= ~IFF_UP;
3373 ifr.ifr_flags = ifp->if_flags & 0xffff;
3374 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3375 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3376 ifp->if_flags |= IFF_UP;
3377 ifr.ifr_flags = ifp->if_flags & 0xffff;
3378 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3379 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3382 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3387 * The name argument must be a pointer to storage which will last as
3388 * long as the interface does. For physical devices, the result of
3389 * device_get_name(dev) is a good choice and for pseudo-devices a
3390 * static string works well.
3393 if_initname(struct ifnet *ifp, const char *name, int unit)
3395 ifp->if_dname = name;
3396 ifp->if_dunit = unit;
3397 if (unit != IF_DUNIT_NONE)
3398 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3400 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3404 if_printf(struct ifnet *ifp, const char * fmt, ...)
3409 retval = printf("%s: ", ifp->if_xname);
3411 retval += vprintf(fmt, ap);
3417 if_start(struct ifnet *ifp)
3420 (*(ifp)->if_start)(ifp);
3424 * Backwards compatibility interface for drivers
3425 * that have not implemented it
3428 if_transmit(struct ifnet *ifp, struct mbuf *m)
3432 IFQ_HANDOFF(ifp, m, error);
3437 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3444 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3449 if (_IF_QFULL(ifq)) {
3451 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3456 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3457 if (m->m_flags & (M_BCAST|M_MCAST))
3458 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3459 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3461 _IF_ENQUEUE(ifq, m);
3463 if (ifp != NULL && !active)
3464 (*(ifp)->if_start)(ifp);
3469 if_register_com_alloc(u_char type,
3470 if_com_alloc_t *a, if_com_free_t *f)
3473 KASSERT(if_com_alloc[type] == NULL,
3474 ("if_register_com_alloc: %d already registered", type));
3475 KASSERT(if_com_free[type] == NULL,
3476 ("if_register_com_alloc: %d free already registered", type));
3478 if_com_alloc[type] = a;
3479 if_com_free[type] = f;
3483 if_deregister_com_alloc(u_char type)
3486 KASSERT(if_com_alloc[type] != NULL,
3487 ("if_deregister_com_alloc: %d not registered", type));
3488 KASSERT(if_com_free[type] != NULL,
3489 ("if_deregister_com_alloc: %d free not registered", type));
3490 if_com_alloc[type] = NULL;
3491 if_com_free[type] = NULL;
3494 /* API for driver access to network stack owned ifnet.*/
3496 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3500 oldbrate = ifp->if_baudrate;
3501 ifp->if_baudrate = baudrate;
3506 if_getbaudrate(if_t ifp)
3509 return (((struct ifnet *)ifp)->if_baudrate);
3513 if_setcapabilities(if_t ifp, int capabilities)
3515 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3520 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3522 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3523 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3529 if_getcapabilities(if_t ifp)
3531 return ((struct ifnet *)ifp)->if_capabilities;
3535 if_setcapenable(if_t ifp, int capabilities)
3537 ((struct ifnet *)ifp)->if_capenable = capabilities;
3542 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3545 ((struct ifnet *)ifp)->if_capenable |= setcap;
3547 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3553 if_getdname(if_t ifp)
3555 return ((struct ifnet *)ifp)->if_dname;
3559 if_togglecapenable(if_t ifp, int togglecap)
3561 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3566 if_getcapenable(if_t ifp)
3568 return ((struct ifnet *)ifp)->if_capenable;
3572 * This is largely undesirable because it ties ifnet to a device, but does
3573 * provide flexiblity for an embedded product vendor. Should be used with
3574 * the understanding that it violates the interface boundaries, and should be
3575 * a last resort only.
3578 if_setdev(if_t ifp, void *dev)
3584 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3586 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3587 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3593 if_getdrvflags(if_t ifp)
3595 return ((struct ifnet *)ifp)->if_drv_flags;
3599 if_setdrvflags(if_t ifp, int flags)
3601 ((struct ifnet *)ifp)->if_drv_flags = flags;
3607 if_setflags(if_t ifp, int flags)
3609 ((struct ifnet *)ifp)->if_flags = flags;
3614 if_setflagbits(if_t ifp, int set, int clear)
3616 ((struct ifnet *)ifp)->if_flags |= set;
3617 ((struct ifnet *)ifp)->if_flags &= ~clear;
3623 if_getflags(if_t ifp)
3625 return ((struct ifnet *)ifp)->if_flags;
3629 if_clearhwassist(if_t ifp)
3631 ((struct ifnet *)ifp)->if_hwassist = 0;
3636 if_sethwassistbits(if_t ifp, int toset, int toclear)
3638 ((struct ifnet *)ifp)->if_hwassist |= toset;
3639 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3645 if_sethwassist(if_t ifp, int hwassist_bit)
3647 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3652 if_gethwassist(if_t ifp)
3654 return ((struct ifnet *)ifp)->if_hwassist;
3658 if_setmtu(if_t ifp, int mtu)
3660 ((struct ifnet *)ifp)->if_mtu = mtu;
3667 return ((struct ifnet *)ifp)->if_mtu;
3671 if_getmtu_family(if_t ifp, int family)
3675 for (dp = domains; dp; dp = dp->dom_next) {
3676 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3677 return (dp->dom_ifmtu((struct ifnet *)ifp));
3680 return (((struct ifnet *)ifp)->if_mtu);
3684 if_setsoftc(if_t ifp, void *softc)
3686 ((struct ifnet *)ifp)->if_softc = softc;
3691 if_getsoftc(if_t ifp)
3693 return ((struct ifnet *)ifp)->if_softc;
3697 if_setrcvif(struct mbuf *m, if_t ifp)
3699 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3703 if_setvtag(struct mbuf *m, uint16_t tag)
3705 m->m_pkthdr.ether_vtag = tag;
3709 if_getvtag(struct mbuf *m)
3712 return (m->m_pkthdr.ether_vtag);
3716 if_sendq_empty(if_t ifp)
3718 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3722 if_getifaddr(if_t ifp)
3724 return ((struct ifnet *)ifp)->if_addr;
3728 if_getamcount(if_t ifp)
3730 return ((struct ifnet *)ifp)->if_amcount;
3735 if_setsendqready(if_t ifp)
3737 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3742 if_setsendqlen(if_t ifp, int tx_desc_count)
3744 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3745 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3751 if_vlantrunkinuse(if_t ifp)
3753 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
3757 if_input(if_t ifp, struct mbuf* sendmp)
3759 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
3765 #ifndef ETH_ADDR_LEN
3766 #define ETH_ADDR_LEN 6
3770 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
3772 struct ifmultiaddr *ifma;
3773 uint8_t *lmta = (uint8_t *)mta;
3776 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3777 if (ifma->ifma_addr->sa_family != AF_LINK)
3783 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
3784 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
3793 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
3797 if_maddr_rlock(ifp);
3798 error = if_setupmultiaddr(ifp, mta, cnt, max);
3799 if_maddr_runlock(ifp);
3804 if_multiaddr_count(if_t ifp, int max)
3806 struct ifmultiaddr *ifma;
3810 if_maddr_rlock(ifp);
3811 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3812 if (ifma->ifma_addr->sa_family != AF_LINK)
3818 if_maddr_runlock(ifp);
3823 if_dequeue(if_t ifp)
3826 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
3832 if_sendq_prepend(if_t ifp, struct mbuf *m)
3834 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
3839 if_setifheaderlen(if_t ifp, int len)
3841 ((struct ifnet *)ifp)->if_hdrlen = len;
3846 if_getlladdr(if_t ifp)
3848 return (IF_LLADDR((struct ifnet *)ifp));
3852 if_gethandle(u_char type)
3854 return (if_alloc(type));
3858 if_bpfmtap(if_t ifh, struct mbuf *m)
3860 struct ifnet *ifp = (struct ifnet *)ifh;
3866 if_etherbpfmtap(if_t ifh, struct mbuf *m)
3868 struct ifnet *ifp = (struct ifnet *)ifh;
3870 ETHER_BPF_MTAP(ifp, m);
3874 if_vlancap(if_t ifh)
3876 struct ifnet *ifp = (struct ifnet *)ifh;
3877 VLAN_CAPABILITIES(ifp);
3881 if_setinitfn(if_t ifp, void (*init_fn)(void *))
3883 ((struct ifnet *)ifp)->if_init = init_fn;
3887 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
3889 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
3893 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
3895 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
3899 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
3901 ((struct ifnet *)ifp)->if_transmit = start_fn;
3904 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
3906 ((struct ifnet *)ifp)->if_qflush = flush_fn;
3911 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
3914 ifp->if_get_counter = fn;
3917 /* Revisit these - These are inline functions originally. */
3919 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
3921 return drbr_inuse(ifh, br);
3925 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
3927 return drbr_dequeue(ifh, br);
3931 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
3933 return drbr_needs_enqueue(ifh, br);
3937 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
3939 return drbr_enqueue(ifh, br, m);