2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1980, 1986, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * @(#)if.c 8.5 (Berkeley) 1/9/95
36 #include "opt_inet6.h"
39 #include <sys/param.h>
41 #include <sys/eventhandler.h>
42 #include <sys/malloc.h>
43 #include <sys/domainset.h>
46 #include <sys/epoch.h>
48 #include <sys/systm.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/protosw.h>
54 #include <sys/kernel.h>
56 #include <sys/refcount.h>
57 #include <sys/module.h>
58 #include <sys/rwlock.h>
59 #include <sys/sockio.h>
60 #include <sys/syslog.h>
61 #include <sys/sysctl.h>
62 #include <sys/sysent.h>
63 #include <sys/taskqueue.h>
64 #include <sys/domain.h>
68 #include <machine/stdarg.h>
72 #include <net/ethernet.h>
74 #include <net/if_arp.h>
75 #include <net/if_clone.h>
76 #include <net/if_dl.h>
77 #include <net/if_types.h>
78 #include <net/if_var.h>
79 #include <net/if_media.h>
80 #include <net/if_vlan_var.h>
81 #include <net/radix.h>
82 #include <net/route.h>
83 #include <net/route/route_ctl.h>
86 #if defined(INET) || defined(INET6)
87 #include <net/ethernet.h>
88 #include <netinet/in.h>
89 #include <netinet/in_var.h>
90 #include <netinet/ip.h>
91 #include <netinet/ip_carp.h>
93 #include <net/debugnet.h>
94 #include <netinet/if_ether.h>
97 #include <netinet6/in6_var.h>
98 #include <netinet6/in6_ifattach.h>
100 #endif /* INET || INET6 */
102 #include <security/mac/mac_framework.h>
105 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name
106 * and ifr_ifru when it is used in SIOCGIFCONF.
108 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) ==
109 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru");
111 __read_mostly epoch_t net_epoch_preempt;
112 #ifdef COMPAT_FREEBSD32
113 #include <sys/mount.h>
114 #include <compat/freebsd32/freebsd32.h>
116 struct ifreq_buffer32 {
117 uint32_t length; /* (size_t) */
118 uint32_t buffer; /* (void *) */
122 * Interface request structure used for socket
123 * ioctl's. All interface ioctl's must have parameter
124 * definitions which begin with ifr_name. The
125 * remainder may be interface specific.
128 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */
130 struct sockaddr ifru_addr;
131 struct sockaddr ifru_dstaddr;
132 struct sockaddr ifru_broadaddr;
133 struct ifreq_buffer32 ifru_buffer;
144 u_char ifru_vlan_pcp;
147 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32));
148 CTASSERT(__offsetof(struct ifreq, ifr_ifru) ==
149 __offsetof(struct ifreq32, ifr_ifru));
151 struct ifgroupreq32 {
152 char ifgr_name[IFNAMSIZ];
155 char ifgru_group[IFNAMSIZ];
156 uint32_t ifgru_groups;
160 struct ifmediareq32 {
161 char ifm_name[IFNAMSIZ];
167 uint32_t ifm_ulist; /* (int *) */
169 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32)
170 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32)
172 #define _CASE_IOC_IFGROUPREQ_32(cmd) \
173 _IOC_NEWTYPE((cmd), struct ifgroupreq32): case
174 #else /* !COMPAT_FREEBSD32 */
175 #define _CASE_IOC_IFGROUPREQ_32(cmd)
176 #endif /* !COMPAT_FREEBSD32 */
178 #define CASE_IOC_IFGROUPREQ(cmd) \
179 _CASE_IOC_IFGROUPREQ_32(cmd) \
184 #ifdef COMPAT_FREEBSD32
185 struct ifreq32 ifr32;
189 union ifgroupreq_union {
190 struct ifgroupreq ifgr;
191 #ifdef COMPAT_FREEBSD32
192 struct ifgroupreq32 ifgr32;
196 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
198 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
199 "Generic link-management");
201 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
202 &ifqmaxlen, 0, "max send queue size");
204 /* Log link state change events */
205 static int log_link_state_change = 1;
207 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
208 &log_link_state_change, 0,
209 "log interface link state change events");
211 /* Log promiscuous mode change events */
212 static int log_promisc_mode_change = 1;
214 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN,
215 &log_promisc_mode_change, 1,
216 "log promiscuous mode change events");
218 /* Interface description */
219 static unsigned int ifdescr_maxlen = 1024;
220 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
222 "administrative maximum length for interface description");
224 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
226 /* global sx for non-critical path ifdescr */
227 static struct sx ifdescr_sx;
228 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
230 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
231 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
232 /* These are external hooks for CARP. */
233 void (*carp_linkstate_p)(struct ifnet *ifp);
234 void (*carp_demote_adj_p)(int, char *);
235 int (*carp_master_p)(struct ifaddr *);
236 #if defined(INET) || defined(INET6)
237 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
238 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
239 const struct sockaddr *sa);
240 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
241 int (*carp_attach_p)(struct ifaddr *, int);
242 void (*carp_detach_p)(struct ifaddr *, bool);
245 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
248 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
249 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
250 const struct in6_addr *taddr);
253 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
256 * XXX: Style; these should be sorted alphabetically, and unprototyped
257 * static functions should be prototyped. Currently they are sorted by
260 static void if_attachdomain(void *);
261 static void if_attachdomain1(struct ifnet *);
262 static int ifconf(u_long, caddr_t);
263 static void *if_grow(void);
264 static void if_input_default(struct ifnet *, struct mbuf *);
265 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
266 static void if_route(struct ifnet *, int flag, int fam);
267 static int if_setflag(struct ifnet *, int, int, int *, int);
268 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
269 static void if_unroute(struct ifnet *, int flag, int fam);
270 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
271 static void do_link_state_change(void *, int);
272 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
273 static int if_getgroupmembers(struct ifgroupreq *);
274 static void if_delgroups(struct ifnet *);
275 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
276 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
277 static void if_siocaddmulti(void *, int);
279 static int if_vmove(struct ifnet *, struct vnet *);
284 * XXX: declare here to avoid to include many inet6 related files..
285 * should be more generalized?
287 extern void nd6_setmtu(struct ifnet *);
290 /* ipsec helper hooks */
291 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
292 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
294 VNET_DEFINE(int, if_index);
295 int ifqmaxlen = IFQ_MAXLEN;
296 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
297 VNET_DEFINE(struct ifgrouphead, ifg_head);
299 VNET_DEFINE_STATIC(int, if_indexlim) = 8;
301 /* Table of ifnet by index. */
302 VNET_DEFINE(struct ifnet **, ifindex_table);
304 #define V_if_indexlim VNET(if_indexlim)
305 #define V_ifindex_table VNET(ifindex_table)
308 * The global network interface list (V_ifnet) and related state (such as
309 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
310 * an rwlock. Either may be acquired shared to stablize the list, but both
311 * must be acquired writable to modify the list. This model allows us to
312 * both stablize the interface list during interrupt thread processing, but
313 * also to stablize it over long-running ioctls, without introducing priority
314 * inversions and deadlocks.
316 struct rwlock ifnet_rwlock;
317 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
318 struct sx ifnet_sxlock;
319 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
322 * The allocation of network interfaces is a rather non-atomic affair; we
323 * need to select an index before we are ready to expose the interface for
324 * use, so will use this pointer value to indicate reservation.
326 #define IFNET_HOLD (void *)(uintptr_t)(-1)
329 #define VNET_IS_SHUTTING_DOWN(_vnet) \
330 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE)
333 static if_com_alloc_t *if_com_alloc[256];
334 static if_com_free_t *if_com_free[256];
336 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
337 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
338 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
341 ifnet_byindex(u_short idx)
345 if (__predict_false(idx > V_if_index))
348 ifp = *(struct ifnet * const volatile *)(V_ifindex_table + idx);
349 return (__predict_false(ifp == IFNET_HOLD) ? NULL : ifp);
353 ifnet_byindex_ref(u_short idx)
359 ifp = ifnet_byindex(idx);
360 if (ifp == NULL || (ifp->if_flags & IFF_DYING))
367 * Allocate an ifindex array entry; return 0 on success or an error on
371 ifindex_alloc(void **old)
375 IFNET_WLOCK_ASSERT();
377 * Try to find an empty slot below V_if_index. If we fail, take the
380 for (idx = 1; idx <= V_if_index; idx++) {
381 if (V_ifindex_table[idx] == NULL)
385 /* Catch if_index overflow. */
386 if (idx >= V_if_indexlim) {
390 if (idx > V_if_index)
396 ifindex_free_locked(u_short idx)
399 IFNET_WLOCK_ASSERT();
401 V_ifindex_table[idx] = NULL;
402 while (V_if_index > 0 &&
403 V_ifindex_table[V_if_index] == NULL)
408 ifindex_free(u_short idx)
412 ifindex_free_locked(idx);
417 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
420 V_ifindex_table[idx] = ifp;
424 ifaddr_byindex(u_short idx)
427 struct ifaddr *ifa = NULL;
431 ifp = ifnet_byindex(idx);
432 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
438 * Network interface utility routines.
440 * Routines with ifa_ifwith* names take sockaddr *'s as
445 vnet_if_init(const void *unused __unused)
449 CK_STAILQ_INIT(&V_ifnet);
450 CK_STAILQ_INIT(&V_ifg_head);
452 old = if_grow(); /* create initial table */
454 epoch_wait_preempt(net_epoch_preempt);
456 vnet_if_clone_init();
458 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
463 vnet_if_uninit(const void *unused __unused)
466 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
467 "not empty", __func__, __LINE__, &V_ifnet));
468 VNET_ASSERT(CK_STAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
469 "not empty", __func__, __LINE__, &V_ifg_head));
471 free((caddr_t)V_ifindex_table, M_IFNET);
473 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
474 vnet_if_uninit, NULL);
477 vnet_if_return(const void *unused __unused)
479 struct ifnet *ifp, *nifp;
481 /* Return all inherited interfaces to their parent vnets. */
482 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
483 if (ifp->if_home_vnet != ifp->if_vnet)
484 if_vmove(ifp, ifp->if_home_vnet);
487 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
488 vnet_if_return, NULL);
500 IFNET_WLOCK_ASSERT();
501 oldlim = V_if_indexlim;
503 n = (oldlim << 1) * sizeof(*e);
504 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
506 if (V_if_indexlim != oldlim) {
510 if (V_ifindex_table != NULL) {
511 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
512 old = V_ifindex_table;
520 * Allocate a struct ifnet and an index for an interface. A layer 2
521 * common structure will also be allocated if an allocation routine is
522 * registered for the passed type.
525 if_alloc_domain(u_char type, int numa_domain)
531 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
532 if (numa_domain == IF_NODOM)
533 ifp = malloc(sizeof(struct ifnet), M_IFNET,
536 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
537 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
540 idx = ifindex_alloc(&old);
541 if (__predict_false(idx == USHRT_MAX)) {
543 epoch_wait_preempt(net_epoch_preempt);
547 ifnet_setbyindex(idx, IFNET_HOLD);
551 ifp->if_alloctype = type;
552 ifp->if_numa_domain = numa_domain;
554 ifp->if_vnet = curvnet;
556 if (if_com_alloc[type] != NULL) {
557 ifp->if_l2com = if_com_alloc[type](type, ifp);
558 if (ifp->if_l2com == NULL) {
565 IF_ADDR_LOCK_INIT(ifp);
566 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
567 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
568 ifp->if_afdata_initialized = 0;
569 IF_AFDATA_LOCK_INIT(ifp);
570 CK_STAILQ_INIT(&ifp->if_addrhead);
571 CK_STAILQ_INIT(&ifp->if_multiaddrs);
572 CK_STAILQ_INIT(&ifp->if_groups);
576 ifq_init(&ifp->if_snd, ifp);
578 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
579 for (int i = 0; i < IFCOUNTERS; i++)
580 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
581 ifp->if_get_counter = if_get_counter_default;
582 ifp->if_pcp = IFNET_PCP_NONE;
583 ifnet_setbyindex(ifp->if_index, ifp);
588 if_alloc_dev(u_char type, device_t dev)
592 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
593 return (if_alloc_domain(type, IF_NODOM));
594 return (if_alloc_domain(type, numa_domain));
598 if_alloc(u_char type)
601 return (if_alloc_domain(type, IF_NODOM));
604 * Do the actual work of freeing a struct ifnet, and layer 2 common
605 * structure. This call is made when the last reference to an
606 * interface is released.
609 if_free_internal(struct ifnet *ifp)
612 KASSERT((ifp->if_flags & IFF_DYING),
613 ("if_free_internal: interface not dying"));
615 if (if_com_free[ifp->if_alloctype] != NULL)
616 if_com_free[ifp->if_alloctype](ifp->if_l2com,
620 mac_ifnet_destroy(ifp);
622 IF_AFDATA_DESTROY(ifp);
623 IF_ADDR_LOCK_DESTROY(ifp);
624 ifq_delete(&ifp->if_snd);
626 for (int i = 0; i < IFCOUNTERS; i++)
627 counter_u64_free(ifp->if_counters[i]);
629 free(ifp->if_description, M_IFDESCR);
630 free(ifp->if_hw_addr, M_IFADDR);
635 if_destroy(epoch_context_t ctx)
639 ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
640 if_free_internal(ifp);
644 * Deregister an interface and free the associated storage.
647 if_free(struct ifnet *ifp)
650 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
652 CURVNET_SET_QUIET(ifp->if_vnet);
654 KASSERT(ifp == ifnet_byindex(ifp->if_index),
655 ("%s: freeing unallocated ifnet", ifp->if_xname));
657 ifindex_free_locked(ifp->if_index);
660 if (refcount_release(&ifp->if_refcount))
661 NET_EPOCH_CALL(if_destroy, &ifp->if_epoch_ctx);
666 * Interfaces to keep an ifnet type-stable despite the possibility of the
667 * driver calling if_free(). If there are additional references, we defer
668 * freeing the underlying data structure.
671 if_ref(struct ifnet *ifp)
674 /* We don't assert the ifnet list lock here, but arguably should. */
675 refcount_acquire(&ifp->if_refcount);
679 if_rele(struct ifnet *ifp)
682 if (!refcount_release(&ifp->if_refcount))
684 NET_EPOCH_CALL(if_destroy, &ifp->if_epoch_ctx);
688 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
691 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
693 if (ifq->ifq_maxlen == 0)
694 ifq->ifq_maxlen = ifqmaxlen;
697 ifq->altq_disc = NULL;
698 ifq->altq_flags &= ALTQF_CANTCHANGE;
699 ifq->altq_tbr = NULL;
704 ifq_delete(struct ifaltq *ifq)
706 mtx_destroy(&ifq->ifq_mtx);
710 * Perform generic interface initialization tasks and attach the interface
711 * to the list of "active" interfaces. If vmove flag is set on entry
712 * to if_attach_internal(), perform only a limited subset of initialization
713 * tasks, given that we are moving from one vnet to another an ifnet which
714 * has already been fully initialized.
716 * Note that if_detach_internal() removes group membership unconditionally
717 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
718 * Thus, when if_vmove() is applied to a cloned interface, group membership
719 * is lost while a cloned one always joins a group whose name is
720 * ifc->ifc_name. To recover this after if_detach_internal() and
721 * if_attach_internal(), the cloner should be specified to
722 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
723 * attempts to join a group whose name is ifc->ifc_name.
726 * - The decision to return void and thus require this function to
727 * succeed is questionable.
728 * - We should probably do more sanity checking. For instance we don't
729 * do anything to insure if_xname is unique or non-empty.
732 if_attach(struct ifnet *ifp)
735 if_attach_internal(ifp, 0, NULL);
739 * Compute the least common TSO limit.
742 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
745 * 1) If there is no limit currently, take the limit from
746 * the network adapter.
748 * 2) If the network adapter has a limit below the current
751 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
752 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
753 pmax->tsomaxbytes = ifp->if_hw_tsomax;
755 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
756 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
757 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
759 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
760 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
761 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
766 * Update TSO limit of a network adapter.
768 * Returns zero if no change. Else non-zero.
771 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
774 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
775 ifp->if_hw_tsomax = pmax->tsomaxbytes;
778 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
779 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
782 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
783 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
790 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
792 unsigned socksize, ifasize;
793 int namelen, masklen;
794 struct sockaddr_dl *sdl;
797 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
798 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
802 ifp->if_vnet = curvnet;
803 if (ifp->if_home_vnet == NULL)
804 ifp->if_home_vnet = curvnet;
807 if_addgroup(ifp, IFG_ALL);
809 /* Restore group membership for cloned interfaces. */
810 if (vmove && ifc != NULL)
811 if_clone_addgroup(ifp, ifc);
813 getmicrotime(&ifp->if_lastchange);
814 ifp->if_epoch = time_uptime;
816 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
817 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
818 ("transmit and qflush must both either be set or both be NULL"));
819 if (ifp->if_transmit == NULL) {
820 ifp->if_transmit = if_transmit;
821 ifp->if_qflush = if_qflush;
823 if (ifp->if_input == NULL)
824 ifp->if_input = if_input_default;
826 if (ifp->if_requestencap == NULL)
827 ifp->if_requestencap = if_requestencap_default;
831 mac_ifnet_create(ifp);
835 * Create a Link Level name for this device.
837 namelen = strlen(ifp->if_xname);
839 * Always save enough space for any possiable name so we
840 * can do a rename in place later.
842 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
843 socksize = masklen + ifp->if_addrlen;
844 if (socksize < sizeof(*sdl))
845 socksize = sizeof(*sdl);
846 socksize = roundup2(socksize, sizeof(long));
847 ifasize = sizeof(*ifa) + 2 * socksize;
848 ifa = ifa_alloc(ifasize, M_WAITOK);
849 sdl = (struct sockaddr_dl *)(ifa + 1);
850 sdl->sdl_len = socksize;
851 sdl->sdl_family = AF_LINK;
852 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
853 sdl->sdl_nlen = namelen;
854 sdl->sdl_index = ifp->if_index;
855 sdl->sdl_type = ifp->if_type;
858 ifa->ifa_addr = (struct sockaddr *)sdl;
859 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
860 ifa->ifa_netmask = (struct sockaddr *)sdl;
861 sdl->sdl_len = masklen;
863 sdl->sdl_data[--namelen] = 0xff;
864 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
865 /* Reliably crash if used uninitialized. */
866 ifp->if_broadcastaddr = NULL;
868 if (ifp->if_type == IFT_ETHER) {
869 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
873 #if defined(INET) || defined(INET6)
874 /* Use defaults for TSO, if nothing is set */
875 if (ifp->if_hw_tsomax == 0 &&
876 ifp->if_hw_tsomaxsegcount == 0 &&
877 ifp->if_hw_tsomaxsegsize == 0) {
879 * The TSO defaults needs to be such that an
880 * NFS mbuf list of 35 mbufs totalling just
881 * below 64K works and that a chain of mbufs
882 * can be defragged into at most 32 segments:
884 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
885 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
886 ifp->if_hw_tsomaxsegcount = 35;
887 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
889 /* XXX some drivers set IFCAP_TSO after ethernet attach */
890 if (ifp->if_capabilities & IFCAP_TSO) {
891 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
893 ifp->if_hw_tsomaxsegcount,
894 ifp->if_hw_tsomaxsegsize);
902 * Update the interface index in the link layer address
905 for (ifa = ifp->if_addr; ifa != NULL;
906 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
907 if (ifa->ifa_addr->sa_family == AF_LINK) {
908 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
909 sdl->sdl_index = ifp->if_index;
916 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
918 curvnet->vnet_ifcnt++;
922 if (domain_init_status >= 2)
923 if_attachdomain1(ifp);
925 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
926 if (IS_DEFAULT_VNET(curvnet))
927 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
929 /* Announce the interface. */
930 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
934 if_epochalloc(void *dummy __unused)
937 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
939 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL);
942 if_attachdomain(void *dummy)
946 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
947 if_attachdomain1(ifp);
949 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
950 if_attachdomain, NULL);
953 if_attachdomain1(struct ifnet *ifp)
958 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
959 * cannot lock ifp->if_afdata initialization, entirely.
962 if (ifp->if_afdata_initialized >= domain_init_status) {
963 IF_AFDATA_UNLOCK(ifp);
964 log(LOG_WARNING, "%s called more than once on %s\n",
965 __func__, ifp->if_xname);
968 ifp->if_afdata_initialized = domain_init_status;
969 IF_AFDATA_UNLOCK(ifp);
971 /* address family dependent data region */
972 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
973 for (dp = domains; dp; dp = dp->dom_next) {
974 if (dp->dom_ifattach)
975 ifp->if_afdata[dp->dom_family] =
976 (*dp->dom_ifattach)(ifp);
981 * Remove any unicast or broadcast network addresses from an interface.
984 if_purgeaddrs(struct ifnet *ifp)
989 struct epoch_tracker et;
992 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
993 if (ifa->ifa_addr->sa_family != AF_LINK)
1001 /* XXX: Ugly!! ad hoc just for INET */
1002 if (ifa->ifa_addr->sa_family == AF_INET) {
1003 struct ifaliasreq ifr;
1005 bzero(&ifr, sizeof(ifr));
1006 ifr.ifra_addr = *ifa->ifa_addr;
1007 if (ifa->ifa_dstaddr)
1008 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
1009 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
1015 if (ifa->ifa_addr->sa_family == AF_INET6) {
1017 /* ifp_addrhead is already updated */
1022 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1023 IF_ADDR_WUNLOCK(ifp);
1029 * Remove any multicast network addresses from an interface when an ifnet
1033 if_purgemaddrs(struct ifnet *ifp)
1035 struct ifmultiaddr *ifma;
1038 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1039 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1040 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1041 if_delmulti_locked(ifp, ifma, 1);
1043 IF_ADDR_WUNLOCK(ifp);
1047 * Detach an interface, removing it from the list of "active" interfaces.
1048 * If vmove flag is set on entry to if_detach_internal(), perform only a
1049 * limited subset of cleanup tasks, given that we are moving an ifnet from
1050 * one vnet to another, where it must be fully operational.
1052 * XXXRW: There are some significant questions about event ordering, and
1053 * how to prevent things from starting to use the interface during detach.
1056 if_detach(struct ifnet *ifp)
1059 CURVNET_SET_QUIET(ifp->if_vnet);
1060 if_detach_internal(ifp, 0, NULL);
1065 * The vmove flag, if set, indicates that we are called from a callpath
1066 * that is moving an interface to a different vnet instance.
1068 * The shutdown flag, if set, indicates that we are called in the
1069 * process of shutting down a vnet instance. Currently only the
1070 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1071 * on a vnet instance shutdown without this flag being set, e.g., when
1072 * the cloned interfaces are destoyed as first thing of teardown.
1075 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
1085 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1088 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
1090 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
1092 ifp->if_flags |= IFF_DYING;
1099 * While we would want to panic here, we cannot
1100 * guarantee that the interface is indeed still on
1101 * the list given we don't hold locks all the way.
1106 panic("%s: ifp=%p not on the ifnet tailq %p",
1107 __func__, ifp, &V_ifnet);
1109 return; /* XXX this should panic as well? */
1114 * At this point we know the interface still was on the ifnet list
1115 * and we removed it so we are in a stable state.
1118 curvnet->vnet_ifcnt--;
1120 epoch_wait_preempt(net_epoch_preempt);
1123 * Ensure all pending EPOCH(9) callbacks have been executed. This
1124 * fixes issues about late destruction of multicast options
1125 * which lead to leave group calls, which in turn access the
1126 * belonging ifnet structure:
1128 epoch_drain_callbacks(net_epoch_preempt);
1131 * In any case (destroy or vmove) detach us from the groups
1132 * and remove/wait for pending events on the taskq.
1133 * XXX-BZ in theory an interface could still enqueue a taskq change?
1137 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1138 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1141 * Check if this is a cloned interface or not. Must do even if
1142 * shutting down as a if_vmove_reclaim() would move the ifp and
1143 * the if_clone_addgroup() will have a corrupted string overwise
1144 * from a gibberish pointer.
1146 if (vmove && ifcp != NULL)
1147 *ifcp = if_clone_findifc(ifp);
1153 * On VNET shutdown abort here as the stack teardown will do all
1154 * the work top-down for us.
1157 /* Give interface users the chance to clean up. */
1158 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1161 * In case of a vmove we are done here without error.
1162 * If we would signal an error it would lead to the same
1163 * abort as if we did not find the ifnet anymore.
1164 * if_detach() calls us in void context and does not care
1165 * about an early abort notification, so life is splendid :)
1167 goto finish_vnet_shutdown;
1172 * At this point we are not tearing down a VNET and are either
1173 * going to destroy or vmove the interface and have to cleanup
1178 * Remove routes and flush queues.
1181 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1182 altq_disable(&ifp->if_snd);
1183 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1184 altq_detach(&ifp->if_snd);
1195 * Remove all IPv6 kernel structs related to ifp. This should be done
1196 * before removing routing entries below, since IPv6 interface direct
1197 * routes are expected to be removed by the IPv6-specific kernel API.
1198 * Otherwise, the kernel will detect some inconsistency and bark it.
1202 if_purgemaddrs(ifp);
1204 /* Announce that the interface is gone. */
1205 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1206 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1207 if (IS_DEFAULT_VNET(curvnet))
1208 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1212 * Prevent further calls into the device driver via ifnet.
1217 * Clean up all addresses.
1220 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1221 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1222 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1223 IF_ADDR_WUNLOCK(ifp);
1226 IF_ADDR_WUNLOCK(ifp);
1229 rt_flushifroutes(ifp);
1232 finish_vnet_shutdown:
1235 * We cannot hold the lock over dom_ifdetach calls as they might
1236 * sleep, for example trying to drain a callout, thus open up the
1237 * theoretical race with re-attaching.
1239 IF_AFDATA_LOCK(ifp);
1240 i = ifp->if_afdata_initialized;
1241 ifp->if_afdata_initialized = 0;
1242 IF_AFDATA_UNLOCK(ifp);
1243 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1244 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1245 (*dp->dom_ifdetach)(ifp,
1246 ifp->if_afdata[dp->dom_family]);
1247 ifp->if_afdata[dp->dom_family] = NULL;
1256 * if_vmove() performs a limited version of if_detach() in current
1257 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1258 * An attempt is made to shrink if_index in current vnet, find an
1259 * unused if_index in target vnet and calls if_grow() if necessary,
1260 * and finally find an unused if_xname for the target vnet.
1263 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1265 struct if_clone *ifc;
1267 u_int bif_dlt, bif_hdrlen;
1274 * if_detach_internal() will call the eventhandler to notify
1275 * interface departure. That will detach if_bpf. We need to
1276 * safe the dlt and hdrlen so we can re-attach it later.
1278 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1282 * Detach from current vnet, but preserve LLADDR info, do not
1283 * mark as dead etc. so that the ifnet can be reattached later.
1284 * If we cannot find it, we lost the race to someone else.
1286 rc = if_detach_internal(ifp, 1, &ifc);
1291 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1292 * the if_index for that vnet if possible.
1294 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1295 * or we'd lock on one vnet and unlock on another.
1298 ifindex_free_locked(ifp->if_index);
1302 /* Don't re-attach DYING interfaces. */
1303 if (ifp->if_flags & IFF_DYING)
1307 * Perform interface-specific reassignment tasks, if provided by
1310 if (ifp->if_reassign != NULL)
1311 ifp->if_reassign(ifp, new_vnet, NULL);
1314 * Switch to the context of the target vnet.
1316 CURVNET_SET_QUIET(new_vnet);
1319 ifp->if_index = ifindex_alloc(&old);
1320 if (__predict_false(ifp->if_index == USHRT_MAX)) {
1322 epoch_wait_preempt(net_epoch_preempt);
1326 ifnet_setbyindex(ifp->if_index, ifp);
1329 if_attach_internal(ifp, 1, ifc);
1332 if (ifp->if_bpf == NULL)
1333 bpfattach(ifp, bif_dlt, bif_hdrlen);
1341 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1344 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1351 /* Try to find the prison within our visibility. */
1352 sx_slock(&allprison_lock);
1353 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1354 sx_sunlock(&allprison_lock);
1357 prison_hold_locked(pr);
1358 mtx_unlock(&pr->pr_mtx);
1360 /* Do not try to move the iface from and to the same prison. */
1361 if (pr->pr_vnet == ifp->if_vnet) {
1366 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1367 /* XXX Lock interfaces to avoid races. */
1368 CURVNET_SET_QUIET(pr->pr_vnet);
1369 difp = ifunit(ifname);
1376 /* Make sure the VNET is stable. */
1377 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1385 /* Move the interface into the child jail/vnet. */
1386 error = if_vmove(ifp, pr->pr_vnet);
1388 /* Report the new if_xname back to the userland on success. */
1390 sprintf(ifname, "%s", ifp->if_xname);
1397 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1400 struct vnet *vnet_dst;
1405 /* Try to find the prison within our visibility. */
1406 sx_slock(&allprison_lock);
1407 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1408 sx_sunlock(&allprison_lock);
1411 prison_hold_locked(pr);
1412 mtx_unlock(&pr->pr_mtx);
1414 /* Make sure the named iface exists in the source prison/vnet. */
1415 CURVNET_SET(pr->pr_vnet);
1416 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1423 /* Do not try to move the iface from and to the same prison. */
1424 vnet_dst = TD_TO_VNET(td);
1425 if (vnet_dst == ifp->if_vnet) {
1431 /* Make sure the VNET is stable. */
1432 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1439 /* Get interface back from child jail/vnet. */
1440 error = if_vmove(ifp, vnet_dst);
1443 /* Report the new if_xname back to the userland on success. */
1445 sprintf(ifname, "%s", ifp->if_xname);
1453 * Add a group to an interface
1456 if_addgroup(struct ifnet *ifp, const char *groupname)
1458 struct ifg_list *ifgl;
1459 struct ifg_group *ifg = NULL;
1460 struct ifg_member *ifgm;
1463 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1464 groupname[strlen(groupname) - 1] <= '9')
1468 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1469 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1474 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
1479 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1485 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1486 if (!strcmp(ifg->ifg_group, groupname))
1490 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
1496 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1497 ifg->ifg_refcnt = 0;
1498 CK_STAILQ_INIT(&ifg->ifg_members);
1499 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1504 ifgl->ifgl_group = ifg;
1505 ifgm->ifgm_ifp = ifp;
1508 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1509 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1510 IF_ADDR_WUNLOCK(ifp);
1515 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1516 EVENTHANDLER_INVOKE(group_change_event, groupname);
1522 * Helper function to remove a group out of an interface. Expects the global
1523 * ifnet lock to be write-locked, and drops it before returning.
1526 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
1527 const char *groupname)
1529 struct ifg_member *ifgm;
1532 IFNET_WLOCK_ASSERT();
1535 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1536 IF_ADDR_WUNLOCK(ifp);
1538 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
1539 if (ifgm->ifgm_ifp == ifp) {
1540 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1541 ifg_member, ifgm_next);
1546 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1547 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
1555 epoch_wait_preempt(net_epoch_preempt);
1557 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1558 free(ifgl->ifgl_group, M_TEMP);
1563 EVENTHANDLER_INVOKE(group_change_event, groupname);
1567 * Remove a group from an interface
1570 if_delgroup(struct ifnet *ifp, const char *groupname)
1572 struct ifg_list *ifgl;
1575 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1576 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
1583 _if_delgroup_locked(ifp, ifgl, groupname);
1589 * Remove an interface from all groups
1592 if_delgroups(struct ifnet *ifp)
1594 struct ifg_list *ifgl;
1595 char groupname[IFNAMSIZ];
1598 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
1599 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1600 _if_delgroup_locked(ifp, ifgl, groupname);
1607 ifgr_group_get(void *ifgrp)
1609 union ifgroupreq_union *ifgrup;
1612 #ifdef COMPAT_FREEBSD32
1613 if (SV_CURPROC_FLAG(SV_ILP32))
1614 return (&ifgrup->ifgr32.ifgr_ifgru.ifgru_group[0]);
1616 return (&ifgrup->ifgr.ifgr_ifgru.ifgru_group[0]);
1619 static struct ifg_req *
1620 ifgr_groups_get(void *ifgrp)
1622 union ifgroupreq_union *ifgrup;
1625 #ifdef COMPAT_FREEBSD32
1626 if (SV_CURPROC_FLAG(SV_ILP32))
1627 return ((struct ifg_req *)(uintptr_t)
1628 ifgrup->ifgr32.ifgr_ifgru.ifgru_groups);
1630 return (ifgrup->ifgr.ifgr_ifgru.ifgru_groups);
1634 * Stores all groups from an interface in memory pointed to by ifgr.
1637 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1640 struct ifg_list *ifgl;
1641 struct ifg_req ifgrq, *ifgp;
1645 if (ifgr->ifgr_len == 0) {
1646 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1647 ifgr->ifgr_len += sizeof(struct ifg_req);
1651 len = ifgr->ifgr_len;
1652 ifgp = ifgr_groups_get(ifgr);
1654 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1655 if (len < sizeof(ifgrq))
1657 bzero(&ifgrq, sizeof ifgrq);
1658 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1659 sizeof(ifgrq.ifgrq_group));
1660 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1662 len -= sizeof(ifgrq);
1670 * Stores all members of a group in memory pointed to by igfr
1673 if_getgroupmembers(struct ifgroupreq *ifgr)
1675 struct ifg_group *ifg;
1676 struct ifg_member *ifgm;
1677 struct ifg_req ifgrq, *ifgp;
1681 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1682 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
1689 if (ifgr->ifgr_len == 0) {
1690 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1691 ifgr->ifgr_len += sizeof(ifgrq);
1696 len = ifgr->ifgr_len;
1697 ifgp = ifgr_groups_get(ifgr);
1698 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1699 if (len < sizeof(ifgrq)) {
1703 bzero(&ifgrq, sizeof ifgrq);
1704 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1705 sizeof(ifgrq.ifgrq_member));
1706 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1710 len -= sizeof(ifgrq);
1719 * Return counter values from counter(9)s stored in ifnet.
1722 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1725 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1727 return (counter_u64_fetch(ifp->if_counters[cnt]));
1731 * Increase an ifnet counter. Usually used for counters shared
1732 * between the stack and a driver, but function supports them all.
1735 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1738 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1740 counter_u64_add(ifp->if_counters[cnt], inc);
1744 * Copy data from ifnet to userland API structure if_data.
1747 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1750 ifd->ifi_type = ifp->if_type;
1751 ifd->ifi_physical = 0;
1752 ifd->ifi_addrlen = ifp->if_addrlen;
1753 ifd->ifi_hdrlen = ifp->if_hdrlen;
1754 ifd->ifi_link_state = ifp->if_link_state;
1756 ifd->ifi_datalen = sizeof(struct if_data);
1757 ifd->ifi_mtu = ifp->if_mtu;
1758 ifd->ifi_metric = ifp->if_metric;
1759 ifd->ifi_baudrate = ifp->if_baudrate;
1760 ifd->ifi_hwassist = ifp->if_hwassist;
1761 ifd->ifi_epoch = ifp->if_epoch;
1762 ifd->ifi_lastchange = ifp->if_lastchange;
1764 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1765 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1766 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1767 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1768 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1769 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1770 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1771 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1772 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1773 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1774 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1775 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1779 * Initialization, destruction and refcounting functions for ifaddrs.
1782 ifa_alloc(size_t size, int flags)
1786 KASSERT(size >= sizeof(struct ifaddr),
1787 ("%s: invalid size %zu", __func__, size));
1789 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1793 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1795 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1797 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1799 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1802 refcount_init(&ifa->ifa_refcnt, 1);
1807 /* free(NULL) is okay */
1808 counter_u64_free(ifa->ifa_opackets);
1809 counter_u64_free(ifa->ifa_ipackets);
1810 counter_u64_free(ifa->ifa_obytes);
1811 counter_u64_free(ifa->ifa_ibytes);
1812 free(ifa, M_IFADDR);
1818 ifa_ref(struct ifaddr *ifa)
1821 refcount_acquire(&ifa->ifa_refcnt);
1825 ifa_destroy(epoch_context_t ctx)
1829 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1830 counter_u64_free(ifa->ifa_opackets);
1831 counter_u64_free(ifa->ifa_ipackets);
1832 counter_u64_free(ifa->ifa_obytes);
1833 counter_u64_free(ifa->ifa_ibytes);
1834 free(ifa, M_IFADDR);
1838 ifa_free(struct ifaddr *ifa)
1841 if (refcount_release(&ifa->ifa_refcnt))
1842 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
1846 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1847 struct sockaddr *ia)
1849 struct rib_cmd_info rc;
1850 struct epoch_tracker et;
1852 struct rt_addrinfo info;
1853 struct sockaddr_dl null_sdl;
1855 struct ifaddr *rti_ifa = NULL;
1859 NET_EPOCH_ENTER(et);
1860 bzero(&info, sizeof(info));
1861 if (cmd != RTM_DELETE)
1862 info.rti_ifp = V_loif;
1863 if (cmd == RTM_ADD) {
1864 /* explicitly specify (loopback) ifa */
1865 if (info.rti_ifp != NULL) {
1866 rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
1867 if (rti_ifa != NULL)
1869 info.rti_ifa = rti_ifa;
1872 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
1873 info.rti_info[RTAX_DST] = ia;
1874 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1875 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1877 error = rib_action(ifp->if_fib, cmd, &info, &rc);
1880 if (rti_ifa != NULL)
1884 (cmd == RTM_ADD && error == EEXIST) ||
1885 (cmd == RTM_DELETE && (error == ENOENT || error == ESRCH)))
1888 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1889 __func__, otype, if_name(ifp), error);
1895 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1898 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1902 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1905 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1909 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1912 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1916 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1917 * structs used to represent other address families, it is necessary
1918 * to perform a different comparison.
1921 #define sa_dl_equal(a1, a2) \
1922 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1923 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1924 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1925 CLLADDR((const struct sockaddr_dl *)(a2)), \
1926 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1929 * Locate an interface based on a complete address.
1933 ifa_ifwithaddr(const struct sockaddr *addr)
1940 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1941 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1942 if (ifa->ifa_addr->sa_family != addr->sa_family)
1944 if (sa_equal(addr, ifa->ifa_addr)) {
1947 /* IP6 doesn't have broadcast */
1948 if ((ifp->if_flags & IFF_BROADCAST) &&
1949 ifa->ifa_broadaddr &&
1950 ifa->ifa_broadaddr->sa_len != 0 &&
1951 sa_equal(ifa->ifa_broadaddr, addr)) {
1962 ifa_ifwithaddr_check(const struct sockaddr *addr)
1964 struct epoch_tracker et;
1967 NET_EPOCH_ENTER(et);
1968 rc = (ifa_ifwithaddr(addr) != NULL);
1974 * Locate an interface based on the broadcast address.
1978 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1984 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1985 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1987 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1988 if (ifa->ifa_addr->sa_family != addr->sa_family)
1990 if ((ifp->if_flags & IFF_BROADCAST) &&
1991 ifa->ifa_broadaddr &&
1992 ifa->ifa_broadaddr->sa_len != 0 &&
1993 sa_equal(ifa->ifa_broadaddr, addr)) {
2004 * Locate the point to point interface with a given destination address.
2008 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
2014 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2015 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
2017 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2019 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2020 if (ifa->ifa_addr->sa_family != addr->sa_family)
2022 if (ifa->ifa_dstaddr != NULL &&
2023 sa_equal(addr, ifa->ifa_dstaddr)) {
2034 * Find an interface on a specific network. If many, choice
2035 * is most specific found.
2038 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
2042 struct ifaddr *ifa_maybe = NULL;
2043 u_int af = addr->sa_family;
2044 const char *addr_data = addr->sa_data, *cplim;
2048 * AF_LINK addresses can be looked up directly by their index number,
2049 * so do that if we can.
2051 if (af == AF_LINK) {
2052 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
2053 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
2054 return (ifaddr_byindex(sdl->sdl_index));
2058 * Scan though each interface, looking for ones that have addresses
2059 * in this address family and the requested fib.
2061 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2062 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2064 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2065 const char *cp, *cp2, *cp3;
2067 if (ifa->ifa_addr->sa_family != af)
2069 if (af == AF_INET &&
2070 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
2072 * This is a bit broken as it doesn't
2073 * take into account that the remote end may
2074 * be a single node in the network we are
2076 * The trouble is that we don't know the
2077 * netmask for the remote end.
2079 if (ifa->ifa_dstaddr != NULL &&
2080 sa_equal(addr, ifa->ifa_dstaddr)) {
2085 * Scan all the bits in the ifa's address.
2086 * If a bit dissagrees with what we are
2087 * looking for, mask it with the netmask
2088 * to see if it really matters.
2089 * (A byte at a time)
2091 if (ifa->ifa_netmask == 0)
2094 cp2 = ifa->ifa_addr->sa_data;
2095 cp3 = ifa->ifa_netmask->sa_data;
2096 cplim = ifa->ifa_netmask->sa_len
2097 + (char *)ifa->ifa_netmask;
2099 if ((*cp++ ^ *cp2++) & *cp3++)
2100 goto next; /* next address! */
2102 * If the netmask of what we just found
2103 * is more specific than what we had before
2104 * (if we had one), or if the virtual status
2105 * of new prefix is better than of the old one,
2106 * then remember the new one before continuing
2107 * to search for an even better one.
2109 if (ifa_maybe == NULL ||
2110 ifa_preferred(ifa_maybe, ifa) ||
2111 rn_refines((caddr_t)ifa->ifa_netmask,
2112 (caddr_t)ifa_maybe->ifa_netmask)) {
2125 * Find an interface address specific to an interface best matching
2129 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2132 const char *cp, *cp2, *cp3;
2134 struct ifaddr *ifa_maybe = NULL;
2135 u_int af = addr->sa_family;
2141 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2142 if (ifa->ifa_addr->sa_family != af)
2144 if (ifa_maybe == NULL)
2146 if (ifa->ifa_netmask == 0) {
2147 if (sa_equal(addr, ifa->ifa_addr) ||
2148 (ifa->ifa_dstaddr &&
2149 sa_equal(addr, ifa->ifa_dstaddr)))
2153 if (ifp->if_flags & IFF_POINTOPOINT) {
2154 if (sa_equal(addr, ifa->ifa_dstaddr))
2158 cp2 = ifa->ifa_addr->sa_data;
2159 cp3 = ifa->ifa_netmask->sa_data;
2160 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2161 for (; cp3 < cplim; cp3++)
2162 if ((*cp++ ^ *cp2++) & *cp3)
2174 * See whether new ifa is better than current one:
2175 * 1) A non-virtual one is preferred over virtual.
2176 * 2) A virtual in master state preferred over any other state.
2178 * Used in several address selecting functions.
2181 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2184 return (cur->ifa_carp && (!next->ifa_carp ||
2185 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2188 struct sockaddr_dl *
2189 link_alloc_sdl(size_t size, int flags)
2192 return (malloc(size, M_TEMP, flags));
2196 link_free_sdl(struct sockaddr *sa)
2202 * Fills in given sdl with interface basic info.
2203 * Returns pointer to filled sdl.
2205 struct sockaddr_dl *
2206 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2208 struct sockaddr_dl *sdl;
2210 sdl = (struct sockaddr_dl *)paddr;
2211 memset(sdl, 0, sizeof(struct sockaddr_dl));
2212 sdl->sdl_len = sizeof(struct sockaddr_dl);
2213 sdl->sdl_family = AF_LINK;
2214 sdl->sdl_index = ifp->if_index;
2215 sdl->sdl_type = iftype;
2221 * Mark an interface down and notify protocols of
2225 if_unroute(struct ifnet *ifp, int flag, int fam)
2229 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2231 ifp->if_flags &= ~flag;
2232 getmicrotime(&ifp->if_lastchange);
2233 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2234 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2235 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2236 ifp->if_qflush(ifp);
2239 (*carp_linkstate_p)(ifp);
2244 * Mark an interface up and notify protocols of
2248 if_route(struct ifnet *ifp, int flag, int fam)
2252 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2254 ifp->if_flags |= flag;
2255 getmicrotime(&ifp->if_lastchange);
2256 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2257 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2258 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2260 (*carp_linkstate_p)(ifp);
2267 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2268 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2269 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2270 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2271 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2272 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2273 int (*vlan_setcookie_p)(struct ifnet *, void *);
2274 void *(*vlan_cookie_p)(struct ifnet *);
2277 * Handle a change in the interface link state. To avoid LORs
2278 * between driver lock and upper layer locks, as well as possible
2279 * recursions, we post event to taskqueue, and all job
2280 * is done in static do_link_state_change().
2283 if_link_state_change(struct ifnet *ifp, int link_state)
2285 /* Return if state hasn't changed. */
2286 if (ifp->if_link_state == link_state)
2289 ifp->if_link_state = link_state;
2291 /* XXXGL: reference ifp? */
2292 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2296 do_link_state_change(void *arg, int pending)
2302 link_state = ifp->if_link_state;
2304 CURVNET_SET(ifp->if_vnet);
2306 if (ifp->if_vlantrunk != NULL)
2307 (*vlan_link_state_p)(ifp);
2309 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2310 ifp->if_l2com != NULL)
2311 (*ng_ether_link_state_p)(ifp, link_state);
2313 (*carp_linkstate_p)(ifp);
2315 ifp->if_bridge_linkstate(ifp);
2317 (*lagg_linkstate_p)(ifp, link_state);
2319 if (IS_DEFAULT_VNET(curvnet))
2320 devctl_notify("IFNET", ifp->if_xname,
2321 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2324 if_printf(ifp, "%d link states coalesced\n", pending);
2325 if (log_link_state_change)
2326 if_printf(ifp, "link state changed to %s\n",
2327 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2328 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2333 * Mark an interface down and notify protocols of
2337 if_down(struct ifnet *ifp)
2340 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2341 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2345 * Mark an interface up and notify protocols of
2349 if_up(struct ifnet *ifp)
2352 if_route(ifp, IFF_UP, AF_UNSPEC);
2353 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2357 * Flush an interface queue.
2360 if_qflush(struct ifnet *ifp)
2368 if (ALTQ_IS_ENABLED(ifq))
2372 while ((m = n) != NULL) {
2383 * Map interface name to interface structure pointer, with or without
2384 * returning a reference.
2387 ifunit_ref(const char *name)
2389 struct epoch_tracker et;
2392 NET_EPOCH_ENTER(et);
2393 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2394 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2395 !(ifp->if_flags & IFF_DYING))
2405 ifunit(const char *name)
2407 struct epoch_tracker et;
2410 NET_EPOCH_ENTER(et);
2411 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2412 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2420 ifr_buffer_get_buffer(void *data)
2422 union ifreq_union *ifrup;
2425 #ifdef COMPAT_FREEBSD32
2426 if (SV_CURPROC_FLAG(SV_ILP32))
2427 return ((void *)(uintptr_t)
2428 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2430 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2434 ifr_buffer_set_buffer_null(void *data)
2436 union ifreq_union *ifrup;
2439 #ifdef COMPAT_FREEBSD32
2440 if (SV_CURPROC_FLAG(SV_ILP32))
2441 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2444 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2448 ifr_buffer_get_length(void *data)
2450 union ifreq_union *ifrup;
2453 #ifdef COMPAT_FREEBSD32
2454 if (SV_CURPROC_FLAG(SV_ILP32))
2455 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2457 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2461 ifr_buffer_set_length(void *data, size_t len)
2463 union ifreq_union *ifrup;
2466 #ifdef COMPAT_FREEBSD32
2467 if (SV_CURPROC_FLAG(SV_ILP32))
2468 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2471 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2475 ifr_data_get_ptr(void *ifrp)
2477 union ifreq_union *ifrup;
2480 #ifdef COMPAT_FREEBSD32
2481 if (SV_CURPROC_FLAG(SV_ILP32))
2482 return ((void *)(uintptr_t)
2483 ifrup->ifr32.ifr_ifru.ifru_data);
2485 return (ifrup->ifr.ifr_ifru.ifru_data);
2489 * Hardware specific interface ioctls.
2492 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2495 int error = 0, do_ifup = 0;
2496 int new_flags, temp_flags;
2497 size_t namelen, onamelen;
2499 char *descrbuf, *odescrbuf;
2500 char new_name[IFNAMSIZ];
2502 struct sockaddr_dl *sdl;
2504 ifr = (struct ifreq *)data;
2507 ifr->ifr_index = ifp->if_index;
2511 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2512 ifr->ifr_flags = temp_flags & 0xffff;
2513 ifr->ifr_flagshigh = temp_flags >> 16;
2517 ifr->ifr_reqcap = ifp->if_capabilities;
2518 ifr->ifr_curcap = ifp->if_capenable;
2523 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2528 ifr->ifr_metric = ifp->if_metric;
2532 ifr->ifr_mtu = ifp->if_mtu;
2536 /* XXXGL: did this ever worked? */
2542 sx_slock(&ifdescr_sx);
2543 if (ifp->if_description == NULL)
2546 /* space for terminating nul */
2547 descrlen = strlen(ifp->if_description) + 1;
2548 if (ifr_buffer_get_length(ifr) < descrlen)
2549 ifr_buffer_set_buffer_null(ifr);
2551 error = copyout(ifp->if_description,
2552 ifr_buffer_get_buffer(ifr), descrlen);
2553 ifr_buffer_set_length(ifr, descrlen);
2555 sx_sunlock(&ifdescr_sx);
2559 error = priv_check(td, PRIV_NET_SETIFDESCR);
2564 * Copy only (length-1) bytes to make sure that
2565 * if_description is always nul terminated. The
2566 * length parameter is supposed to count the
2567 * terminating nul in.
2569 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2570 return (ENAMETOOLONG);
2571 else if (ifr_buffer_get_length(ifr) == 0)
2574 descrbuf = malloc(ifr_buffer_get_length(ifr),
2575 M_IFDESCR, M_WAITOK | M_ZERO);
2576 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2577 ifr_buffer_get_length(ifr) - 1);
2579 free(descrbuf, M_IFDESCR);
2584 sx_xlock(&ifdescr_sx);
2585 odescrbuf = ifp->if_description;
2586 ifp->if_description = descrbuf;
2587 sx_xunlock(&ifdescr_sx);
2589 getmicrotime(&ifp->if_lastchange);
2590 free(odescrbuf, M_IFDESCR);
2594 ifr->ifr_fib = ifp->if_fib;
2598 error = priv_check(td, PRIV_NET_SETIFFIB);
2601 if (ifr->ifr_fib >= rt_numfibs)
2604 ifp->if_fib = ifr->ifr_fib;
2608 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2612 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2613 * check, so we don't need special handling here yet.
2615 new_flags = (ifr->ifr_flags & 0xffff) |
2616 (ifr->ifr_flagshigh << 16);
2617 if (ifp->if_flags & IFF_UP &&
2618 (new_flags & IFF_UP) == 0) {
2620 } else if (new_flags & IFF_UP &&
2621 (ifp->if_flags & IFF_UP) == 0) {
2624 /* See if permanently promiscuous mode bit is about to flip */
2625 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2626 if (new_flags & IFF_PPROMISC)
2627 ifp->if_flags |= IFF_PROMISC;
2628 else if (ifp->if_pcount == 0)
2629 ifp->if_flags &= ~IFF_PROMISC;
2630 if (log_promisc_mode_change)
2631 if_printf(ifp, "permanently promiscuous mode %s\n",
2632 ((new_flags & IFF_PPROMISC) ?
2633 "enabled" : "disabled"));
2635 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2636 (new_flags &~ IFF_CANTCHANGE);
2637 if (ifp->if_ioctl) {
2638 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2642 getmicrotime(&ifp->if_lastchange);
2646 error = priv_check(td, PRIV_NET_SETIFCAP);
2649 if (ifp->if_ioctl == NULL)
2650 return (EOPNOTSUPP);
2651 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2653 error = (*ifp->if_ioctl)(ifp, cmd, data);
2655 getmicrotime(&ifp->if_lastchange);
2660 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2665 error = priv_check(td, PRIV_NET_SETIFNAME);
2668 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2672 if (new_name[0] == '\0')
2674 if (new_name[IFNAMSIZ-1] != '\0') {
2675 new_name[IFNAMSIZ-1] = '\0';
2676 if (strlen(new_name) == IFNAMSIZ-1)
2679 if (strcmp(new_name, ifp->if_xname) == 0)
2681 if (ifunit(new_name) != NULL)
2685 * XXX: Locking. Nothing else seems to lock if_flags,
2686 * and there are numerous other races with the
2687 * ifunit() checks not being atomic with namespace
2688 * changes (renames, vmoves, if_attach, etc).
2690 ifp->if_flags |= IFF_RENAMING;
2692 /* Announce the departure of the interface. */
2693 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2694 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2696 if_printf(ifp, "changing name to '%s'\n", new_name);
2699 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2701 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2702 namelen = strlen(new_name);
2703 onamelen = sdl->sdl_nlen;
2705 * Move the address if needed. This is safe because we
2706 * allocate space for a name of length IFNAMSIZ when we
2707 * create this in if_attach().
2709 if (namelen != onamelen) {
2710 bcopy(sdl->sdl_data + onamelen,
2711 sdl->sdl_data + namelen, sdl->sdl_alen);
2713 bcopy(new_name, sdl->sdl_data, namelen);
2714 sdl->sdl_nlen = namelen;
2715 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2716 bzero(sdl->sdl_data, onamelen);
2717 while (namelen != 0)
2718 sdl->sdl_data[--namelen] = 0xff;
2719 IF_ADDR_WUNLOCK(ifp);
2721 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2722 /* Announce the return of the interface. */
2723 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2725 ifp->if_flags &= ~IFF_RENAMING;
2730 error = priv_check(td, PRIV_NET_SETIFVNET);
2733 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2738 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2741 ifp->if_metric = ifr->ifr_metric;
2742 getmicrotime(&ifp->if_lastchange);
2746 error = priv_check(td, PRIV_NET_SETIFPHYS);
2749 if (ifp->if_ioctl == NULL)
2750 return (EOPNOTSUPP);
2751 error = (*ifp->if_ioctl)(ifp, cmd, data);
2753 getmicrotime(&ifp->if_lastchange);
2758 u_long oldmtu = ifp->if_mtu;
2760 error = priv_check(td, PRIV_NET_SETIFMTU);
2763 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2765 if (ifp->if_ioctl == NULL)
2766 return (EOPNOTSUPP);
2767 error = (*ifp->if_ioctl)(ifp, cmd, data);
2769 getmicrotime(&ifp->if_lastchange);
2772 DEBUGNET_NOTIFY_MTU(ifp);
2776 * If the link MTU changed, do network layer specific procedure.
2778 if (ifp->if_mtu != oldmtu) {
2789 if (cmd == SIOCADDMULTI)
2790 error = priv_check(td, PRIV_NET_ADDMULTI);
2792 error = priv_check(td, PRIV_NET_DELMULTI);
2796 /* Don't allow group membership on non-multicast interfaces. */
2797 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2798 return (EOPNOTSUPP);
2800 /* Don't let users screw up protocols' entries. */
2801 if (ifr->ifr_addr.sa_family != AF_LINK)
2804 if (cmd == SIOCADDMULTI) {
2805 struct epoch_tracker et;
2806 struct ifmultiaddr *ifma;
2809 * Userland is only permitted to join groups once
2810 * via the if_addmulti() KPI, because it cannot hold
2811 * struct ifmultiaddr * between calls. It may also
2812 * lose a race while we check if the membership
2815 NET_EPOCH_ENTER(et);
2816 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2821 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2823 error = if_delmulti(ifp, &ifr->ifr_addr);
2826 getmicrotime(&ifp->if_lastchange);
2829 case SIOCSIFPHYADDR:
2830 case SIOCDIFPHYADDR:
2832 case SIOCSIFPHYADDR_IN6:
2835 case SIOCSIFGENERIC:
2836 error = priv_check(td, PRIV_NET_HWIOCTL);
2839 if (ifp->if_ioctl == NULL)
2840 return (EOPNOTSUPP);
2841 error = (*ifp->if_ioctl)(ifp, cmd, data);
2843 getmicrotime(&ifp->if_lastchange);
2847 case SIOCGIFPSRCADDR:
2848 case SIOCGIFPDSTADDR:
2851 case SIOCGIFGENERIC:
2853 case SIOCGIFRSSHASH:
2854 case SIOCGIFDOWNREASON:
2855 if (ifp->if_ioctl == NULL)
2856 return (EOPNOTSUPP);
2857 error = (*ifp->if_ioctl)(ifp, cmd, data);
2861 error = priv_check(td, PRIV_NET_SETLLADDR);
2864 error = if_setlladdr(ifp,
2865 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2869 error = if_gethwaddr(ifp, ifr);
2872 case CASE_IOC_IFGROUPREQ(SIOCAIFGROUP):
2873 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2876 if ((error = if_addgroup(ifp,
2877 ifgr_group_get((struct ifgroupreq *)data))))
2881 case CASE_IOC_IFGROUPREQ(SIOCGIFGROUP):
2883 struct epoch_tracker et;
2885 NET_EPOCH_ENTER(et);
2886 error = if_getgroup((struct ifgroupreq *)data, ifp);
2891 case CASE_IOC_IFGROUPREQ(SIOCDIFGROUP):
2892 error = priv_check(td, PRIV_NET_DELIFGROUP);
2895 if ((error = if_delgroup(ifp,
2896 ifgr_group_get((struct ifgroupreq *)data))))
2907 #ifdef COMPAT_FREEBSD32
2915 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2918 #ifdef COMPAT_FREEBSD32
2920 ifmr_init(struct ifmediareq *ifmr, caddr_t data)
2922 struct ifmediareq32 *ifmr32;
2924 ifmr32 = (struct ifmediareq32 *)data;
2925 memcpy(ifmr->ifm_name, ifmr32->ifm_name,
2926 sizeof(ifmr->ifm_name));
2927 ifmr->ifm_current = ifmr32->ifm_current;
2928 ifmr->ifm_mask = ifmr32->ifm_mask;
2929 ifmr->ifm_status = ifmr32->ifm_status;
2930 ifmr->ifm_active = ifmr32->ifm_active;
2931 ifmr->ifm_count = ifmr32->ifm_count;
2932 ifmr->ifm_ulist = (int *)(uintptr_t)ifmr32->ifm_ulist;
2936 ifmr_update(const struct ifmediareq *ifmr, caddr_t data)
2938 struct ifmediareq32 *ifmr32;
2940 ifmr32 = (struct ifmediareq32 *)data;
2941 ifmr32->ifm_current = ifmr->ifm_current;
2942 ifmr32->ifm_mask = ifmr->ifm_mask;
2943 ifmr32->ifm_status = ifmr->ifm_status;
2944 ifmr32->ifm_active = ifmr->ifm_active;
2945 ifmr32->ifm_count = ifmr->ifm_count;
2953 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2955 #ifdef COMPAT_FREEBSD32
2956 caddr_t saved_data = NULL;
2957 struct ifmediareq ifmr;
2958 struct ifmediareq *ifmrp = NULL;
2968 CURVNET_SET(so->so_vnet);
2970 /* Make sure the VNET is stable. */
2971 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
2980 error = ifconf(cmd, data);
2983 #ifdef COMPAT_FREEBSD32
2986 struct ifconf32 *ifc32;
2989 ifc32 = (struct ifconf32 *)data;
2990 ifc.ifc_len = ifc32->ifc_len;
2991 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2993 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2995 ifc32->ifc_len = ifc.ifc_len;
3001 #ifdef COMPAT_FREEBSD32
3003 case SIOCGIFMEDIA32:
3004 case SIOCGIFXMEDIA32:
3006 ifmr_init(ifmrp, data);
3007 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
3009 data = (caddr_t)ifmrp;
3013 ifr = (struct ifreq *)data;
3017 error = priv_check(td, PRIV_NET_SETIFVNET);
3019 error = if_vmove_reclaim(td, ifr->ifr_name,
3025 error = priv_check(td, PRIV_NET_IFCREATE);
3027 error = if_clone_create(ifr->ifr_name,
3028 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3029 ifr_data_get_ptr(ifr) : NULL);
3032 error = priv_check(td, PRIV_NET_IFDESTROY);
3034 error = if_clone_destroy(ifr->ifr_name);
3037 case SIOCIFGCLONERS:
3038 error = if_clone_list((struct if_clonereq *)data);
3041 case CASE_IOC_IFGROUPREQ(SIOCGIFGMEMB):
3042 error = if_getgroupmembers((struct ifgroupreq *)data);
3045 #if defined(INET) || defined(INET6)
3048 if (carp_ioctl_p == NULL)
3049 error = EPROTONOSUPPORT;
3051 error = (*carp_ioctl_p)(ifr, cmd, td);
3056 ifp = ifunit_ref(ifr->ifr_name);
3062 error = ifhwioctl(cmd, ifp, data, td);
3063 if (error != ENOIOCTL)
3066 oif_flags = ifp->if_flags;
3067 if (so->so_proto == NULL) {
3073 * Pass the request on to the socket control method, and if the
3074 * latter returns EOPNOTSUPP, directly to the interface.
3076 * Make an exception for the legacy SIOCSIF* requests. Drivers
3077 * trust SIOCSIFADDR et al to come from an already privileged
3078 * layer, and do not perform any credentials checks or input
3081 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
3083 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3084 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3085 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3086 error = (*ifp->if_ioctl)(ifp, cmd, data);
3088 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
3090 if (ifp->if_flags & IFF_UP)
3098 #ifdef COMPAT_FREEBSD32
3099 if (ifmrp != NULL) {
3100 KASSERT((cmd == SIOCGIFMEDIA || cmd == SIOCGIFXMEDIA),
3101 ("ifmrp non-NULL, but cmd is not an ifmedia req 0x%lx",
3104 ifmr_update(ifmrp, data);
3112 * The code common to handling reference counted flags,
3113 * e.g., in ifpromisc() and if_allmulti().
3114 * The "pflag" argument can specify a permanent mode flag to check,
3115 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3117 * Only to be used on stack-owned flags, not driver-owned flags.
3120 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3124 int oldflags, oldcount;
3126 /* Sanity checks to catch programming errors */
3127 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3128 ("%s: setting driver-owned flag %d", __func__, flag));
3131 KASSERT(*refcount >= 0,
3132 ("%s: increment negative refcount %d for flag %d",
3133 __func__, *refcount, flag));
3135 KASSERT(*refcount > 0,
3136 ("%s: decrement non-positive refcount %d for flag %d",
3137 __func__, *refcount, flag));
3139 /* In case this mode is permanent, just touch refcount */
3140 if (ifp->if_flags & pflag) {
3141 *refcount += onswitch ? 1 : -1;
3145 /* Save ifnet parameters for if_ioctl() may fail */
3146 oldcount = *refcount;
3147 oldflags = ifp->if_flags;
3150 * See if we aren't the only and touching refcount is enough.
3151 * Actually toggle interface flag if we are the first or last.
3156 ifp->if_flags |= flag;
3160 ifp->if_flags &= ~flag;
3163 /* Call down the driver since we've changed interface flags */
3164 if (ifp->if_ioctl == NULL) {
3168 ifr.ifr_flags = ifp->if_flags & 0xffff;
3169 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3170 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3173 /* Notify userland that interface flags have changed */
3178 /* Recover after driver error */
3179 *refcount = oldcount;
3180 ifp->if_flags = oldflags;
3185 * Set/clear promiscuous mode on interface ifp based on the truth value
3186 * of pswitch. The calls are reference counted so that only the first
3187 * "on" request actually has an effect, as does the final "off" request.
3188 * Results are undefined if the "off" and "on" requests are not matched.
3191 ifpromisc(struct ifnet *ifp, int pswitch)
3194 int oldflags = ifp->if_flags;
3196 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3197 &ifp->if_pcount, pswitch);
3198 /* If promiscuous mode status has changed, log a message */
3199 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3200 log_promisc_mode_change)
3201 if_printf(ifp, "promiscuous mode %s\n",
3202 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3207 * Return interface configuration
3208 * of system. List may be used
3209 * in later ioctl's (above) to get
3210 * other information.
3214 ifconf(u_long cmd, caddr_t data)
3216 struct ifconf *ifc = (struct ifconf *)data;
3221 int error, full = 0, valid_len, max_len;
3223 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
3224 max_len = MAXPHYS - 1;
3226 /* Prevent hostile input from being able to crash the system */
3227 if (ifc->ifc_len <= 0)
3231 if (ifc->ifc_len <= max_len) {
3232 max_len = ifc->ifc_len;
3235 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3240 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3241 struct epoch_tracker et;
3245 * Zero the ifr to make sure we don't disclose the contents
3248 memset(&ifr, 0, sizeof(ifr));
3250 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3251 >= sizeof(ifr.ifr_name)) {
3254 return (ENAMETOOLONG);
3258 NET_EPOCH_ENTER(et);
3259 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3260 struct sockaddr *sa = ifa->ifa_addr;
3262 if (prison_if(curthread->td_ucred, sa) != 0)
3265 if (sa->sa_len <= sizeof(*sa)) {
3266 if (sa->sa_len < sizeof(*sa)) {
3267 memset(&ifr.ifr_ifru.ifru_addr, 0,
3268 sizeof(ifr.ifr_ifru.ifru_addr));
3269 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3272 ifr.ifr_ifru.ifru_addr = *sa;
3273 sbuf_bcat(sb, &ifr, sizeof(ifr));
3274 max_len += sizeof(ifr);
3277 offsetof(struct ifreq, ifr_addr));
3278 max_len += offsetof(struct ifreq, ifr_addr);
3279 sbuf_bcat(sb, sa, sa->sa_len);
3280 max_len += sa->sa_len;
3283 if (sbuf_error(sb) == 0)
3284 valid_len = sbuf_len(sb);
3288 sbuf_bcat(sb, &ifr, sizeof(ifr));
3289 max_len += sizeof(ifr);
3291 if (sbuf_error(sb) == 0)
3292 valid_len = sbuf_len(sb);
3298 * If we didn't allocate enough space (uncommon), try again. If
3299 * we have already allocated as much space as we are allowed,
3300 * return what we've got.
3302 if (valid_len != max_len && !full) {
3307 ifc->ifc_len = valid_len;
3309 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3315 * Just like ifpromisc(), but for all-multicast-reception mode.
3318 if_allmulti(struct ifnet *ifp, int onswitch)
3321 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3324 struct ifmultiaddr *
3325 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3327 struct ifmultiaddr *ifma;
3329 IF_ADDR_LOCK_ASSERT(ifp);
3331 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3332 if (sa->sa_family == AF_LINK) {
3333 if (sa_dl_equal(ifma->ifma_addr, sa))
3336 if (sa_equal(ifma->ifma_addr, sa))
3345 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3346 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3347 * the ifnet multicast address list here, so the caller must do that and
3348 * other setup work (such as notifying the device driver). The reference
3349 * count is initialized to 1.
3351 static struct ifmultiaddr *
3352 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3355 struct ifmultiaddr *ifma;
3356 struct sockaddr *dupsa;
3358 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3363 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3364 if (dupsa == NULL) {
3365 free(ifma, M_IFMADDR);
3368 bcopy(sa, dupsa, sa->sa_len);
3369 ifma->ifma_addr = dupsa;
3371 ifma->ifma_ifp = ifp;
3372 ifma->ifma_refcount = 1;
3373 ifma->ifma_protospec = NULL;
3376 ifma->ifma_lladdr = NULL;
3380 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3381 if (dupsa == NULL) {
3382 free(ifma->ifma_addr, M_IFMADDR);
3383 free(ifma, M_IFMADDR);
3386 bcopy(llsa, dupsa, llsa->sa_len);
3387 ifma->ifma_lladdr = dupsa;
3393 * if_freemulti: free ifmultiaddr structure and possibly attached related
3394 * addresses. The caller is responsible for implementing reference
3395 * counting, notifying the driver, handling routing messages, and releasing
3396 * any dependent link layer state.
3398 #ifdef MCAST_VERBOSE
3399 extern void kdb_backtrace(void);
3402 if_freemulti_internal(struct ifmultiaddr *ifma)
3405 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3406 ifma->ifma_refcount));
3408 if (ifma->ifma_lladdr != NULL)
3409 free(ifma->ifma_lladdr, M_IFMADDR);
3410 #ifdef MCAST_VERBOSE
3412 printf("%s freeing ifma: %p\n", __func__, ifma);
3414 free(ifma->ifma_addr, M_IFMADDR);
3415 free(ifma, M_IFMADDR);
3419 if_destroymulti(epoch_context_t ctx)
3421 struct ifmultiaddr *ifma;
3423 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3424 if_freemulti_internal(ifma);
3428 if_freemulti(struct ifmultiaddr *ifma)
3430 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3431 ifma->ifma_refcount));
3433 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
3437 * Register an additional multicast address with a network interface.
3439 * - If the address is already present, bump the reference count on the
3440 * address and return.
3441 * - If the address is not link-layer, look up a link layer address.
3442 * - Allocate address structures for one or both addresses, and attach to the
3443 * multicast address list on the interface. If automatically adding a link
3444 * layer address, the protocol address will own a reference to the link
3445 * layer address, to be freed when it is freed.
3446 * - Notify the network device driver of an addition to the multicast address
3449 * 'sa' points to caller-owned memory with the desired multicast address.
3451 * 'retifma' will be used to return a pointer to the resulting multicast
3452 * address reference, if desired.
3455 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3456 struct ifmultiaddr **retifma)
3458 struct ifmultiaddr *ifma, *ll_ifma;
3459 struct sockaddr *llsa;
3460 struct sockaddr_dl sdl;
3464 IN_MULTI_LIST_UNLOCK_ASSERT();
3467 IN6_MULTI_LIST_UNLOCK_ASSERT();
3470 * If the address is already present, return a new reference to it;
3471 * otherwise, allocate storage and set up a new address.
3474 ifma = if_findmulti(ifp, sa);
3476 ifma->ifma_refcount++;
3477 if (retifma != NULL)
3479 IF_ADDR_WUNLOCK(ifp);
3484 * The address isn't already present; resolve the protocol address
3485 * into a link layer address, and then look that up, bump its
3486 * refcount or allocate an ifma for that also.
3487 * Most link layer resolving functions returns address data which
3488 * fits inside default sockaddr_dl structure. However callback
3489 * can allocate another sockaddr structure, in that case we need to
3494 if (ifp->if_resolvemulti != NULL) {
3495 /* Provide called function with buffer size information */
3496 sdl.sdl_len = sizeof(sdl);
3497 llsa = (struct sockaddr *)&sdl;
3498 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3504 * Allocate the new address. Don't hook it up yet, as we may also
3505 * need to allocate a link layer multicast address.
3507 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3514 * If a link layer address is found, we'll need to see if it's
3515 * already present in the address list, or allocate is as well.
3516 * When this block finishes, the link layer address will be on the
3520 ll_ifma = if_findmulti(ifp, llsa);
3521 if (ll_ifma == NULL) {
3522 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3523 if (ll_ifma == NULL) {
3524 --ifma->ifma_refcount;
3529 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3530 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3533 ll_ifma->ifma_refcount++;
3534 ifma->ifma_llifma = ll_ifma;
3538 * We now have a new multicast address, ifma, and possibly a new or
3539 * referenced link layer address. Add the primary address to the
3540 * ifnet address list.
3542 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3543 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3545 if (retifma != NULL)
3549 * Must generate the message while holding the lock so that 'ifma'
3550 * pointer is still valid.
3552 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3553 IF_ADDR_WUNLOCK(ifp);
3556 * We are certain we have added something, so call down to the
3557 * interface to let them know about it.
3559 if (ifp->if_ioctl != NULL) {
3560 if (THREAD_CAN_SLEEP())
3561 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3563 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3566 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3567 link_free_sdl(llsa);
3572 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3573 link_free_sdl(llsa);
3576 IF_ADDR_WUNLOCK(ifp);
3581 if_siocaddmulti(void *arg, int pending)
3588 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3590 CURVNET_SET(ifp->if_vnet);
3591 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3596 * Delete a multicast group membership by network-layer group address.
3598 * Returns ENOENT if the entry could not be found. If ifp no longer
3599 * exists, results are undefined. This entry point should only be used
3600 * from subsystems which do appropriate locking to hold ifp for the
3601 * duration of the call.
3602 * Network-layer protocol domains must use if_delmulti_ifma().
3605 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3607 struct ifmultiaddr *ifma;
3610 KASSERT(ifp, ("%s: NULL ifp", __func__));
3614 ifma = if_findmulti(ifp, sa);
3616 lastref = if_delmulti_locked(ifp, ifma, 0);
3617 IF_ADDR_WUNLOCK(ifp);
3622 if (lastref && ifp->if_ioctl != NULL) {
3623 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3630 * Delete all multicast group membership for an interface.
3631 * Should be used to quickly flush all multicast filters.
3634 if_delallmulti(struct ifnet *ifp)
3636 struct ifmultiaddr *ifma;
3637 struct ifmultiaddr *next;
3640 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3641 if_delmulti_locked(ifp, ifma, 0);
3642 IF_ADDR_WUNLOCK(ifp);
3646 if_delmulti_ifma(struct ifmultiaddr *ifma)
3648 if_delmulti_ifma_flags(ifma, 0);
3652 * Delete a multicast group membership by group membership pointer.
3653 * Network-layer protocol domains must use this routine.
3655 * It is safe to call this routine if the ifp disappeared.
3658 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3662 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3664 IN_MULTI_LIST_UNLOCK_ASSERT();
3666 ifp = ifma->ifma_ifp;
3669 printf("%s: ifma_ifp seems to be detached\n", __func__);
3671 struct epoch_tracker et;
3674 NET_EPOCH_ENTER(et);
3675 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3684 * If and only if the ifnet instance exists: Acquire the address lock.
3689 lastref = if_delmulti_locked(ifp, ifma, flags);
3693 * If and only if the ifnet instance exists:
3694 * Release the address lock.
3695 * If the group was left: update the hardware hash filter.
3697 IF_ADDR_WUNLOCK(ifp);
3698 if (lastref && ifp->if_ioctl != NULL) {
3699 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3705 * Perform deletion of network-layer and/or link-layer multicast address.
3707 * Return 0 if the reference count was decremented.
3708 * Return 1 if the final reference was released, indicating that the
3709 * hardware hash filter should be reprogrammed.
3712 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3714 struct ifmultiaddr *ll_ifma;
3716 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3717 KASSERT(ifma->ifma_ifp == ifp,
3718 ("%s: inconsistent ifp %p", __func__, ifp));
3719 IF_ADDR_WLOCK_ASSERT(ifp);
3722 ifp = ifma->ifma_ifp;
3723 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3726 * If the ifnet is detaching, null out references to ifnet,
3727 * so that upper protocol layers will notice, and not attempt
3728 * to obtain locks for an ifnet which no longer exists. The
3729 * routing socket announcement must happen before the ifnet
3730 * instance is detached from the system.
3734 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3737 * ifp may already be nulled out if we are being reentered
3738 * to delete the ll_ifma.
3741 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3742 ifma->ifma_ifp = NULL;
3746 if (--ifma->ifma_refcount > 0)
3749 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3750 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3751 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3754 * If this ifma is a network-layer ifma, a link-layer ifma may
3755 * have been associated with it. Release it first if so.
3757 ll_ifma = ifma->ifma_llifma;
3758 if (ll_ifma != NULL) {
3759 KASSERT(ifma->ifma_lladdr != NULL,
3760 ("%s: llifma w/o lladdr", __func__));
3762 ll_ifma->ifma_ifp = NULL; /* XXX */
3763 if (--ll_ifma->ifma_refcount == 0) {
3765 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3766 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3768 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3771 if_freemulti(ll_ifma);
3776 struct ifmultiaddr *ifmatmp;
3778 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3779 MPASS(ifma != ifmatmp);
3784 * The last reference to this instance of struct ifmultiaddr
3785 * was released; the hardware should be notified of this change.
3791 * Set the link layer address on an interface.
3793 * At this time we only support certain types of interfaces,
3794 * and we don't allow the length of the address to change.
3796 * Set noinline to be dtrace-friendly
3799 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3801 struct sockaddr_dl *sdl;
3809 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3813 if (len != sdl->sdl_alen) /* don't allow length to change */
3816 switch (ifp->if_type) {
3821 case IFT_IEEE8023ADLAG:
3822 bcopy(lladdr, LLADDR(sdl), len);
3829 * If the interface is already up, we need
3830 * to re-init it in order to reprogram its
3833 if ((ifp->if_flags & IFF_UP) != 0) {
3834 if (ifp->if_ioctl) {
3835 ifp->if_flags &= ~IFF_UP;
3836 ifr.ifr_flags = ifp->if_flags & 0xffff;
3837 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3838 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3839 ifp->if_flags |= IFF_UP;
3840 ifr.ifr_flags = ifp->if_flags & 0xffff;
3841 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3842 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3845 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3851 * Compat function for handling basic encapsulation requests.
3852 * Not converted stacks (FDDI, IB, ..) supports traditional
3853 * output model: ARP (and other similar L2 protocols) are handled
3854 * inside output routine, arpresolve/nd6_resolve() returns MAC
3855 * address instead of full prepend.
3857 * This function creates calculated header==MAC for IPv4/IPv6 and
3858 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3862 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3865 if (req->rtype != IFENCAP_LL)
3866 return (EOPNOTSUPP);
3868 if (req->bufsize < req->lladdr_len)
3871 switch (req->family) {
3876 return (EAFNOSUPPORT);
3879 /* Copy lladdr to storage as is */
3880 memmove(req->buf, req->lladdr, req->lladdr_len);
3881 req->bufsize = req->lladdr_len;
3882 req->lladdr_off = 0;
3888 * Tunnel interfaces can nest, also they may cause infinite recursion
3889 * calls when misconfigured. We'll prevent this by detecting loops.
3890 * High nesting level may cause stack exhaustion. We'll prevent this
3891 * by introducing upper limit.
3893 * Return 0, if tunnel nesting count is equal or less than limit.
3896 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3904 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3905 if (*(struct ifnet **)(mtag + 1) == ifp) {
3906 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3911 if (count > limit) {
3913 "%s: if_output recursively called too many times(%d)\n",
3914 if_name(ifp), count);
3917 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3920 *(struct ifnet **)(mtag + 1) = ifp;
3921 m_tag_prepend(m, mtag);
3926 * Get the link layer address that was read from the hardware at attach.
3928 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3929 * their component interfaces as IFT_IEEE8023ADLAG.
3932 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3935 if (ifp->if_hw_addr == NULL)
3938 switch (ifp->if_type) {
3940 case IFT_IEEE8023ADLAG:
3941 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3949 * The name argument must be a pointer to storage which will last as
3950 * long as the interface does. For physical devices, the result of
3951 * device_get_name(dev) is a good choice and for pseudo-devices a
3952 * static string works well.
3955 if_initname(struct ifnet *ifp, const char *name, int unit)
3957 ifp->if_dname = name;
3958 ifp->if_dunit = unit;
3959 if (unit != IF_DUNIT_NONE)
3960 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3962 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3966 if_printf(struct ifnet *ifp, const char *fmt, ...)
3971 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
3973 vlog(LOG_INFO, if_fmt, ap);
3979 if_start(struct ifnet *ifp)
3982 (*(ifp)->if_start)(ifp);
3986 * Backwards compatibility interface for drivers
3987 * that have not implemented it
3990 if_transmit(struct ifnet *ifp, struct mbuf *m)
3994 IFQ_HANDOFF(ifp, m, error);
3999 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4006 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4011 if (_IF_QFULL(ifq)) {
4013 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4018 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4019 if (m->m_flags & (M_BCAST|M_MCAST))
4020 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4021 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4023 _IF_ENQUEUE(ifq, m);
4025 if (ifp != NULL && !active)
4026 (*(ifp)->if_start)(ifp);
4031 if_register_com_alloc(u_char type,
4032 if_com_alloc_t *a, if_com_free_t *f)
4035 KASSERT(if_com_alloc[type] == NULL,
4036 ("if_register_com_alloc: %d already registered", type));
4037 KASSERT(if_com_free[type] == NULL,
4038 ("if_register_com_alloc: %d free already registered", type));
4040 if_com_alloc[type] = a;
4041 if_com_free[type] = f;
4045 if_deregister_com_alloc(u_char type)
4048 KASSERT(if_com_alloc[type] != NULL,
4049 ("if_deregister_com_alloc: %d not registered", type));
4050 KASSERT(if_com_free[type] != NULL,
4051 ("if_deregister_com_alloc: %d free not registered", type));
4052 if_com_alloc[type] = NULL;
4053 if_com_free[type] = NULL;
4056 /* API for driver access to network stack owned ifnet.*/
4058 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4062 oldbrate = ifp->if_baudrate;
4063 ifp->if_baudrate = baudrate;
4068 if_getbaudrate(if_t ifp)
4071 return (((struct ifnet *)ifp)->if_baudrate);
4075 if_setcapabilities(if_t ifp, int capabilities)
4077 ((struct ifnet *)ifp)->if_capabilities = capabilities;
4082 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4084 ((struct ifnet *)ifp)->if_capabilities |= setbit;
4085 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
4091 if_getcapabilities(if_t ifp)
4093 return ((struct ifnet *)ifp)->if_capabilities;
4097 if_setcapenable(if_t ifp, int capabilities)
4099 ((struct ifnet *)ifp)->if_capenable = capabilities;
4104 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4107 ((struct ifnet *)ifp)->if_capenable |= setcap;
4109 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
4115 if_getdname(if_t ifp)
4117 return ((struct ifnet *)ifp)->if_dname;
4121 if_togglecapenable(if_t ifp, int togglecap)
4123 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
4128 if_getcapenable(if_t ifp)
4130 return ((struct ifnet *)ifp)->if_capenable;
4134 * This is largely undesirable because it ties ifnet to a device, but does
4135 * provide flexiblity for an embedded product vendor. Should be used with
4136 * the understanding that it violates the interface boundaries, and should be
4137 * a last resort only.
4140 if_setdev(if_t ifp, void *dev)
4146 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4148 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
4149 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
4155 if_getdrvflags(if_t ifp)
4157 return ((struct ifnet *)ifp)->if_drv_flags;
4161 if_setdrvflags(if_t ifp, int flags)
4163 ((struct ifnet *)ifp)->if_drv_flags = flags;
4168 if_setflags(if_t ifp, int flags)
4171 ifp->if_flags = flags;
4176 if_setflagbits(if_t ifp, int set, int clear)
4178 ((struct ifnet *)ifp)->if_flags |= set;
4179 ((struct ifnet *)ifp)->if_flags &= ~clear;
4185 if_getflags(if_t ifp)
4187 return ((struct ifnet *)ifp)->if_flags;
4191 if_clearhwassist(if_t ifp)
4193 ((struct ifnet *)ifp)->if_hwassist = 0;
4198 if_sethwassistbits(if_t ifp, int toset, int toclear)
4200 ((struct ifnet *)ifp)->if_hwassist |= toset;
4201 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
4207 if_sethwassist(if_t ifp, int hwassist_bit)
4209 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
4214 if_gethwassist(if_t ifp)
4216 return ((struct ifnet *)ifp)->if_hwassist;
4220 if_setmtu(if_t ifp, int mtu)
4222 ((struct ifnet *)ifp)->if_mtu = mtu;
4229 return ((struct ifnet *)ifp)->if_mtu;
4233 if_getmtu_family(if_t ifp, int family)
4237 for (dp = domains; dp; dp = dp->dom_next) {
4238 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4239 return (dp->dom_ifmtu((struct ifnet *)ifp));
4242 return (((struct ifnet *)ifp)->if_mtu);
4246 * Methods for drivers to access interface unicast and multicast
4247 * link level addresses. Driver shall not know 'struct ifaddr' neither
4248 * 'struct ifmultiaddr'.
4251 if_lladdr_count(if_t ifp)
4253 struct epoch_tracker et;
4258 NET_EPOCH_ENTER(et);
4259 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4260 if (ifa->ifa_addr->sa_family == AF_LINK)
4268 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4270 struct epoch_tracker et;
4277 NET_EPOCH_ENTER(et);
4278 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4279 if (ifa->ifa_addr->sa_family != AF_LINK)
4281 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
4290 if_llmaddr_count(if_t ifp)
4292 struct epoch_tracker et;
4293 struct ifmultiaddr *ifma;
4297 NET_EPOCH_ENTER(et);
4298 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4299 if (ifma->ifma_addr->sa_family == AF_LINK)
4307 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4309 struct epoch_tracker et;
4310 struct ifmultiaddr *ifma;
4316 NET_EPOCH_ENTER(et);
4317 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
4318 if (ifma->ifma_addr->sa_family != AF_LINK)
4320 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
4329 if_setsoftc(if_t ifp, void *softc)
4331 ((struct ifnet *)ifp)->if_softc = softc;
4336 if_getsoftc(if_t ifp)
4338 return ((struct ifnet *)ifp)->if_softc;
4342 if_setrcvif(struct mbuf *m, if_t ifp)
4345 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
4346 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4350 if_setvtag(struct mbuf *m, uint16_t tag)
4352 m->m_pkthdr.ether_vtag = tag;
4356 if_getvtag(struct mbuf *m)
4359 return (m->m_pkthdr.ether_vtag);
4363 if_sendq_empty(if_t ifp)
4365 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
4369 if_getifaddr(if_t ifp)
4371 return ((struct ifnet *)ifp)->if_addr;
4375 if_getamcount(if_t ifp)
4377 return ((struct ifnet *)ifp)->if_amcount;
4381 if_setsendqready(if_t ifp)
4383 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
4388 if_setsendqlen(if_t ifp, int tx_desc_count)
4390 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
4391 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
4397 if_vlantrunkinuse(if_t ifp)
4399 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
4403 if_input(if_t ifp, struct mbuf* sendmp)
4405 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
4411 if_dequeue(if_t ifp)
4414 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
4420 if_sendq_prepend(if_t ifp, struct mbuf *m)
4422 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
4427 if_setifheaderlen(if_t ifp, int len)
4429 ((struct ifnet *)ifp)->if_hdrlen = len;
4434 if_getlladdr(if_t ifp)
4436 return (IF_LLADDR((struct ifnet *)ifp));
4440 if_gethandle(u_char type)
4442 return (if_alloc(type));
4446 if_bpfmtap(if_t ifh, struct mbuf *m)
4448 struct ifnet *ifp = (struct ifnet *)ifh;
4454 if_etherbpfmtap(if_t ifh, struct mbuf *m)
4456 struct ifnet *ifp = (struct ifnet *)ifh;
4458 ETHER_BPF_MTAP(ifp, m);
4462 if_vlancap(if_t ifh)
4464 struct ifnet *ifp = (struct ifnet *)ifh;
4465 VLAN_CAPABILITIES(ifp);
4469 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax)
4472 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax;
4477 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount)
4480 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount;
4485 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize)
4488 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize;
4493 if_gethwtsomax(if_t ifp)
4496 return (((struct ifnet *)ifp)->if_hw_tsomax);
4500 if_gethwtsomaxsegcount(if_t ifp)
4503 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount);
4507 if_gethwtsomaxsegsize(if_t ifp)
4510 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize);
4514 if_setinitfn(if_t ifp, void (*init_fn)(void *))
4516 ((struct ifnet *)ifp)->if_init = init_fn;
4520 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4522 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4526 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4528 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4532 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4534 ((struct ifnet *)ifp)->if_transmit = start_fn;
4537 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4539 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4544 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4547 ifp->if_get_counter = fn;
4550 /* Revisit these - These are inline functions originally. */
4552 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4554 return drbr_inuse(ifh, br);
4558 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4560 return drbr_dequeue(ifh, br);
4564 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4566 return drbr_needs_enqueue(ifh, br);
4570 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4572 return drbr_enqueue(ifh, br, m);