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);
501 IFNET_WLOCK_ASSERT();
502 oldlim = V_if_indexlim;
504 n = (oldlim << 1) * sizeof(*e);
505 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
507 if (V_if_indexlim != oldlim) {
511 if (V_ifindex_table != NULL) {
512 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
513 old = V_ifindex_table;
521 * Allocate a struct ifnet and an index for an interface. A layer 2
522 * common structure will also be allocated if an allocation routine is
523 * registered for the passed type.
526 if_alloc_domain(u_char type, int numa_domain)
532 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large"));
533 if (numa_domain == IF_NODOM)
534 ifp = malloc(sizeof(struct ifnet), M_IFNET,
537 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET,
538 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO);
541 idx = ifindex_alloc(&old);
542 if (__predict_false(idx == USHRT_MAX)) {
544 epoch_wait_preempt(net_epoch_preempt);
548 ifnet_setbyindex(idx, IFNET_HOLD);
552 ifp->if_alloctype = type;
553 ifp->if_numa_domain = numa_domain;
555 ifp->if_vnet = curvnet;
557 if (if_com_alloc[type] != NULL) {
558 ifp->if_l2com = if_com_alloc[type](type, ifp);
559 if (ifp->if_l2com == NULL) {
566 IF_ADDR_LOCK_INIT(ifp);
567 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
568 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp);
569 ifp->if_afdata_initialized = 0;
570 IF_AFDATA_LOCK_INIT(ifp);
571 CK_STAILQ_INIT(&ifp->if_addrhead);
572 CK_STAILQ_INIT(&ifp->if_multiaddrs);
573 CK_STAILQ_INIT(&ifp->if_groups);
577 ifq_init(&ifp->if_snd, ifp);
579 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
580 for (int i = 0; i < IFCOUNTERS; i++)
581 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
582 ifp->if_get_counter = if_get_counter_default;
583 ifp->if_pcp = IFNET_PCP_NONE;
584 ifnet_setbyindex(ifp->if_index, ifp);
589 if_alloc_dev(u_char type, device_t dev)
593 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0)
594 return (if_alloc_domain(type, IF_NODOM));
595 return (if_alloc_domain(type, numa_domain));
599 if_alloc(u_char type)
602 return (if_alloc_domain(type, IF_NODOM));
605 * Do the actual work of freeing a struct ifnet, and layer 2 common
606 * structure. This call is made when the last reference to an
607 * interface is released.
610 if_free_internal(struct ifnet *ifp)
613 KASSERT((ifp->if_flags & IFF_DYING),
614 ("if_free_internal: interface not dying"));
616 if (if_com_free[ifp->if_alloctype] != NULL)
617 if_com_free[ifp->if_alloctype](ifp->if_l2com,
621 mac_ifnet_destroy(ifp);
623 IF_AFDATA_DESTROY(ifp);
624 IF_ADDR_LOCK_DESTROY(ifp);
625 ifq_delete(&ifp->if_snd);
627 for (int i = 0; i < IFCOUNTERS; i++)
628 counter_u64_free(ifp->if_counters[i]);
630 free(ifp->if_description, M_IFDESCR);
631 free(ifp->if_hw_addr, M_IFADDR);
636 if_destroy(epoch_context_t ctx)
640 ifp = __containerof(ctx, struct ifnet, if_epoch_ctx);
641 if_free_internal(ifp);
645 * Deregister an interface and free the associated storage.
648 if_free(struct ifnet *ifp)
651 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
653 CURVNET_SET_QUIET(ifp->if_vnet);
655 KASSERT(ifp == ifnet_byindex(ifp->if_index),
656 ("%s: freeing unallocated ifnet", ifp->if_xname));
658 ifindex_free_locked(ifp->if_index);
661 if (refcount_release(&ifp->if_refcount))
662 NET_EPOCH_CALL(if_destroy, &ifp->if_epoch_ctx);
667 * Interfaces to keep an ifnet type-stable despite the possibility of the
668 * driver calling if_free(). If there are additional references, we defer
669 * freeing the underlying data structure.
672 if_ref(struct ifnet *ifp)
675 /* We don't assert the ifnet list lock here, but arguably should. */
676 refcount_acquire(&ifp->if_refcount);
680 if_rele(struct ifnet *ifp)
683 if (!refcount_release(&ifp->if_refcount))
685 NET_EPOCH_CALL(if_destroy, &ifp->if_epoch_ctx);
689 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
692 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
694 if (ifq->ifq_maxlen == 0)
695 ifq->ifq_maxlen = ifqmaxlen;
698 ifq->altq_disc = NULL;
699 ifq->altq_flags &= ALTQF_CANTCHANGE;
700 ifq->altq_tbr = NULL;
705 ifq_delete(struct ifaltq *ifq)
707 mtx_destroy(&ifq->ifq_mtx);
711 * Perform generic interface initialization tasks and attach the interface
712 * to the list of "active" interfaces. If vmove flag is set on entry
713 * to if_attach_internal(), perform only a limited subset of initialization
714 * tasks, given that we are moving from one vnet to another an ifnet which
715 * has already been fully initialized.
717 * Note that if_detach_internal() removes group membership unconditionally
718 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
719 * Thus, when if_vmove() is applied to a cloned interface, group membership
720 * is lost while a cloned one always joins a group whose name is
721 * ifc->ifc_name. To recover this after if_detach_internal() and
722 * if_attach_internal(), the cloner should be specified to
723 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
724 * attempts to join a group whose name is ifc->ifc_name.
727 * - The decision to return void and thus require this function to
728 * succeed is questionable.
729 * - We should probably do more sanity checking. For instance we don't
730 * do anything to insure if_xname is unique or non-empty.
733 if_attach(struct ifnet *ifp)
736 if_attach_internal(ifp, 0, NULL);
740 * Compute the least common TSO limit.
743 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
746 * 1) If there is no limit currently, take the limit from
747 * the network adapter.
749 * 2) If the network adapter has a limit below the current
752 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
753 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
754 pmax->tsomaxbytes = ifp->if_hw_tsomax;
756 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
757 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
758 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
760 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
761 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
762 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
767 * Update TSO limit of a network adapter.
769 * Returns zero if no change. Else non-zero.
772 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
775 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
776 ifp->if_hw_tsomax = pmax->tsomaxbytes;
779 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
780 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
783 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
784 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
791 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
793 unsigned socksize, ifasize;
794 int namelen, masklen;
795 struct sockaddr_dl *sdl;
798 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
799 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
803 ifp->if_vnet = curvnet;
804 if (ifp->if_home_vnet == NULL)
805 ifp->if_home_vnet = curvnet;
808 if_addgroup(ifp, IFG_ALL);
810 /* Restore group membership for cloned interfaces. */
811 if (vmove && ifc != NULL)
812 if_clone_addgroup(ifp, ifc);
814 getmicrotime(&ifp->if_lastchange);
815 ifp->if_epoch = time_uptime;
817 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
818 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
819 ("transmit and qflush must both either be set or both be NULL"));
820 if (ifp->if_transmit == NULL) {
821 ifp->if_transmit = if_transmit;
822 ifp->if_qflush = if_qflush;
824 if (ifp->if_input == NULL)
825 ifp->if_input = if_input_default;
827 if (ifp->if_requestencap == NULL)
828 ifp->if_requestencap = if_requestencap_default;
832 mac_ifnet_create(ifp);
836 * Create a Link Level name for this device.
838 namelen = strlen(ifp->if_xname);
840 * Always save enough space for any possiable name so we
841 * can do a rename in place later.
843 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
844 socksize = masklen + ifp->if_addrlen;
845 if (socksize < sizeof(*sdl))
846 socksize = sizeof(*sdl);
847 socksize = roundup2(socksize, sizeof(long));
848 ifasize = sizeof(*ifa) + 2 * socksize;
849 ifa = ifa_alloc(ifasize, M_WAITOK);
850 sdl = (struct sockaddr_dl *)(ifa + 1);
851 sdl->sdl_len = socksize;
852 sdl->sdl_family = AF_LINK;
853 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
854 sdl->sdl_nlen = namelen;
855 sdl->sdl_index = ifp->if_index;
856 sdl->sdl_type = ifp->if_type;
859 ifa->ifa_addr = (struct sockaddr *)sdl;
860 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
861 ifa->ifa_netmask = (struct sockaddr *)sdl;
862 sdl->sdl_len = masklen;
864 sdl->sdl_data[--namelen] = 0xff;
865 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
866 /* Reliably crash if used uninitialized. */
867 ifp->if_broadcastaddr = NULL;
869 if (ifp->if_type == IFT_ETHER) {
870 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR,
874 #if defined(INET) || defined(INET6)
875 /* Use defaults for TSO, if nothing is set */
876 if (ifp->if_hw_tsomax == 0 &&
877 ifp->if_hw_tsomaxsegcount == 0 &&
878 ifp->if_hw_tsomaxsegsize == 0) {
880 * The TSO defaults needs to be such that an
881 * NFS mbuf list of 35 mbufs totalling just
882 * below 64K works and that a chain of mbufs
883 * can be defragged into at most 32 segments:
885 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
886 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
887 ifp->if_hw_tsomaxsegcount = 35;
888 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
890 /* XXX some drivers set IFCAP_TSO after ethernet attach */
891 if (ifp->if_capabilities & IFCAP_TSO) {
892 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
894 ifp->if_hw_tsomaxsegcount,
895 ifp->if_hw_tsomaxsegsize);
903 * Update the interface index in the link layer address
906 for (ifa = ifp->if_addr; ifa != NULL;
907 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) {
908 if (ifa->ifa_addr->sa_family == AF_LINK) {
909 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
910 sdl->sdl_index = ifp->if_index;
917 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
919 curvnet->vnet_ifcnt++;
923 if (domain_init_status >= 2)
924 if_attachdomain1(ifp);
926 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
927 if (IS_DEFAULT_VNET(curvnet))
928 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
930 /* Announce the interface. */
931 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
935 if_epochalloc(void *dummy __unused)
938 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT);
940 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL);
943 if_attachdomain(void *dummy)
947 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link)
948 if_attachdomain1(ifp);
950 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
951 if_attachdomain, NULL);
954 if_attachdomain1(struct ifnet *ifp)
959 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
960 * cannot lock ifp->if_afdata initialization, entirely.
963 if (ifp->if_afdata_initialized >= domain_init_status) {
964 IF_AFDATA_UNLOCK(ifp);
965 log(LOG_WARNING, "%s called more than once on %s\n",
966 __func__, ifp->if_xname);
969 ifp->if_afdata_initialized = domain_init_status;
970 IF_AFDATA_UNLOCK(ifp);
972 /* address family dependent data region */
973 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
974 for (dp = domains; dp; dp = dp->dom_next) {
975 if (dp->dom_ifattach)
976 ifp->if_afdata[dp->dom_family] =
977 (*dp->dom_ifattach)(ifp);
982 * Remove any unicast or broadcast network addresses from an interface.
985 if_purgeaddrs(struct ifnet *ifp)
990 struct epoch_tracker et;
993 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
994 if (ifa->ifa_addr->sa_family != AF_LINK)
1002 /* XXX: Ugly!! ad hoc just for INET */
1003 if (ifa->ifa_addr->sa_family == AF_INET) {
1004 struct ifaliasreq ifr;
1006 bzero(&ifr, sizeof(ifr));
1007 ifr.ifra_addr = *ifa->ifa_addr;
1008 if (ifa->ifa_dstaddr)
1009 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
1010 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
1016 if (ifa->ifa_addr->sa_family == AF_INET6) {
1018 /* ifp_addrhead is already updated */
1023 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1024 IF_ADDR_WUNLOCK(ifp);
1030 * Remove any multicast network addresses from an interface when an ifnet
1034 if_purgemaddrs(struct ifnet *ifp)
1036 struct ifmultiaddr *ifma;
1039 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) {
1040 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs);
1041 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
1042 if_delmulti_locked(ifp, ifma, 1);
1044 IF_ADDR_WUNLOCK(ifp);
1048 * Detach an interface, removing it from the list of "active" interfaces.
1049 * If vmove flag is set on entry to if_detach_internal(), perform only a
1050 * limited subset of cleanup tasks, given that we are moving an ifnet from
1051 * one vnet to another, where it must be fully operational.
1053 * XXXRW: There are some significant questions about event ordering, and
1054 * how to prevent things from starting to use the interface during detach.
1057 if_detach(struct ifnet *ifp)
1060 CURVNET_SET_QUIET(ifp->if_vnet);
1061 if_detach_internal(ifp, 0, NULL);
1066 * The vmove flag, if set, indicates that we are called from a callpath
1067 * that is moving an interface to a different vnet instance.
1069 * The shutdown flag, if set, indicates that we are called in the
1070 * process of shutting down a vnet instance. Currently only the
1071 * vnet_if_return SYSUNINIT function sets it. Note: we can be called
1072 * on a vnet instance shutdown without this flag being set, e.g., when
1073 * the cloned interfaces are destoyed as first thing of teardown.
1076 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
1086 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1089 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link)
1091 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link);
1093 ifp->if_flags |= IFF_DYING;
1100 * While we would want to panic here, we cannot
1101 * guarantee that the interface is indeed still on
1102 * the list given we don't hold locks all the way.
1107 panic("%s: ifp=%p not on the ifnet tailq %p",
1108 __func__, ifp, &V_ifnet);
1110 return; /* XXX this should panic as well? */
1115 * At this point we know the interface still was on the ifnet list
1116 * and we removed it so we are in a stable state.
1119 curvnet->vnet_ifcnt--;
1121 epoch_wait_preempt(net_epoch_preempt);
1124 * Ensure all pending EPOCH(9) callbacks have been executed. This
1125 * fixes issues about late destruction of multicast options
1126 * which lead to leave group calls, which in turn access the
1127 * belonging ifnet structure:
1129 epoch_drain_callbacks(net_epoch_preempt);
1132 * In any case (destroy or vmove) detach us from the groups
1133 * and remove/wait for pending events on the taskq.
1134 * XXX-BZ in theory an interface could still enqueue a taskq change?
1138 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
1139 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask);
1142 * Check if this is a cloned interface or not. Must do even if
1143 * shutting down as a if_vmove_reclaim() would move the ifp and
1144 * the if_clone_addgroup() will have a corrupted string overwise
1145 * from a gibberish pointer.
1147 if (vmove && ifcp != NULL)
1148 *ifcp = if_clone_findifc(ifp);
1154 * On VNET shutdown abort here as the stack teardown will do all
1155 * the work top-down for us.
1158 /* Give interface users the chance to clean up. */
1159 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1162 * In case of a vmove we are done here without error.
1163 * If we would signal an error it would lead to the same
1164 * abort as if we did not find the ifnet anymore.
1165 * if_detach() calls us in void context and does not care
1166 * about an early abort notification, so life is splendid :)
1168 goto finish_vnet_shutdown;
1173 * At this point we are not tearing down a VNET and are either
1174 * going to destroy or vmove the interface and have to cleanup
1179 * Remove routes and flush queues.
1182 if (ALTQ_IS_ENABLED(&ifp->if_snd))
1183 altq_disable(&ifp->if_snd);
1184 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
1185 altq_detach(&ifp->if_snd);
1196 * Remove all IPv6 kernel structs related to ifp. This should be done
1197 * before removing routing entries below, since IPv6 interface direct
1198 * routes are expected to be removed by the IPv6-specific kernel API.
1199 * Otherwise, the kernel will detect some inconsistency and bark it.
1203 if_purgemaddrs(ifp);
1205 /* Announce that the interface is gone. */
1206 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1207 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1208 if (IS_DEFAULT_VNET(curvnet))
1209 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
1213 * Prevent further calls into the device driver via ifnet.
1218 * Clean up all addresses.
1221 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) {
1222 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead);
1223 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link);
1224 IF_ADDR_WUNLOCK(ifp);
1227 IF_ADDR_WUNLOCK(ifp);
1230 rt_flushifroutes(ifp);
1233 finish_vnet_shutdown:
1236 * We cannot hold the lock over dom_ifdetach calls as they might
1237 * sleep, for example trying to drain a callout, thus open up the
1238 * theoretical race with re-attaching.
1240 IF_AFDATA_LOCK(ifp);
1241 i = ifp->if_afdata_initialized;
1242 ifp->if_afdata_initialized = 0;
1243 IF_AFDATA_UNLOCK(ifp);
1244 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1245 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) {
1246 (*dp->dom_ifdetach)(ifp,
1247 ifp->if_afdata[dp->dom_family]);
1248 ifp->if_afdata[dp->dom_family] = NULL;
1257 * if_vmove() performs a limited version of if_detach() in current
1258 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1259 * An attempt is made to shrink if_index in current vnet, find an
1260 * unused if_index in target vnet and calls if_grow() if necessary,
1261 * and finally find an unused if_xname for the target vnet.
1264 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1266 struct if_clone *ifc;
1268 u_int bif_dlt, bif_hdrlen;
1275 * if_detach_internal() will call the eventhandler to notify
1276 * interface departure. That will detach if_bpf. We need to
1277 * safe the dlt and hdrlen so we can re-attach it later.
1279 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1283 * Detach from current vnet, but preserve LLADDR info, do not
1284 * mark as dead etc. so that the ifnet can be reattached later.
1285 * If we cannot find it, we lost the race to someone else.
1287 rc = if_detach_internal(ifp, 1, &ifc);
1292 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1293 * the if_index for that vnet if possible.
1295 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1296 * or we'd lock on one vnet and unlock on another.
1299 ifindex_free_locked(ifp->if_index);
1303 * Perform interface-specific reassignment tasks, if provided by
1306 if (ifp->if_reassign != NULL)
1307 ifp->if_reassign(ifp, new_vnet, NULL);
1310 * Switch to the context of the target vnet.
1312 CURVNET_SET_QUIET(new_vnet);
1315 ifp->if_index = ifindex_alloc(&old);
1316 if (__predict_false(ifp->if_index == USHRT_MAX)) {
1318 epoch_wait_preempt(net_epoch_preempt);
1322 ifnet_setbyindex(ifp->if_index, ifp);
1325 if_attach_internal(ifp, 1, ifc);
1328 if (ifp->if_bpf == NULL)
1329 bpfattach(ifp, bif_dlt, bif_hdrlen);
1337 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1340 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1347 /* Try to find the prison within our visibility. */
1348 sx_slock(&allprison_lock);
1349 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1350 sx_sunlock(&allprison_lock);
1353 prison_hold_locked(pr);
1354 mtx_unlock(&pr->pr_mtx);
1356 /* Do not try to move the iface from and to the same prison. */
1357 if (pr->pr_vnet == ifp->if_vnet) {
1362 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1363 /* XXX Lock interfaces to avoid races. */
1364 CURVNET_SET_QUIET(pr->pr_vnet);
1365 difp = ifunit(ifname);
1372 /* Make sure the VNET is stable. */
1373 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1381 /* Move the interface into the child jail/vnet. */
1382 error = if_vmove(ifp, pr->pr_vnet);
1384 /* Report the new if_xname back to the userland on success. */
1386 sprintf(ifname, "%s", ifp->if_xname);
1393 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1396 struct vnet *vnet_dst;
1401 /* Try to find the prison within our visibility. */
1402 sx_slock(&allprison_lock);
1403 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1404 sx_sunlock(&allprison_lock);
1407 prison_hold_locked(pr);
1408 mtx_unlock(&pr->pr_mtx);
1410 /* Make sure the named iface exists in the source prison/vnet. */
1411 CURVNET_SET(pr->pr_vnet);
1412 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1419 /* Do not try to move the iface from and to the same prison. */
1420 vnet_dst = TD_TO_VNET(td);
1421 if (vnet_dst == ifp->if_vnet) {
1427 /* Make sure the VNET is stable. */
1428 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet);
1435 /* Get interface back from child jail/vnet. */
1436 error = if_vmove(ifp, vnet_dst);
1439 /* Report the new if_xname back to the userland on success. */
1441 sprintf(ifname, "%s", ifp->if_xname);
1449 * Add a group to an interface
1452 if_addgroup(struct ifnet *ifp, const char *groupname)
1454 struct ifg_list *ifgl;
1455 struct ifg_group *ifg = NULL;
1456 struct ifg_member *ifgm;
1459 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1460 groupname[strlen(groupname) - 1] <= '9')
1464 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1465 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1470 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) {
1475 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) {
1481 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1482 if (!strcmp(ifg->ifg_group, groupname))
1486 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) {
1492 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1493 ifg->ifg_refcnt = 0;
1494 CK_STAILQ_INIT(&ifg->ifg_members);
1495 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1500 ifgl->ifgl_group = ifg;
1501 ifgm->ifgm_ifp = ifp;
1504 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1505 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1506 IF_ADDR_WUNLOCK(ifp);
1511 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1512 EVENTHANDLER_INVOKE(group_change_event, groupname);
1518 * Helper function to remove a group out of an interface. Expects the global
1519 * ifnet lock to be write-locked, and drops it before returning.
1522 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl,
1523 const char *groupname)
1525 struct ifg_member *ifgm;
1528 IFNET_WLOCK_ASSERT();
1531 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next);
1532 IF_ADDR_WUNLOCK(ifp);
1534 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) {
1535 if (ifgm->ifgm_ifp == ifp) {
1536 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1537 ifg_member, ifgm_next);
1542 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1543 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group,
1551 epoch_wait_preempt(net_epoch_preempt);
1553 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1554 free(ifgl->ifgl_group, M_TEMP);
1559 EVENTHANDLER_INVOKE(group_change_event, groupname);
1563 * Remove a group from an interface
1566 if_delgroup(struct ifnet *ifp, const char *groupname)
1568 struct ifg_list *ifgl;
1571 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1572 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0)
1579 _if_delgroup_locked(ifp, ifgl, groupname);
1585 * Remove an interface from all groups
1588 if_delgroups(struct ifnet *ifp)
1590 struct ifg_list *ifgl;
1591 char groupname[IFNAMSIZ];
1594 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) {
1595 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1596 _if_delgroup_locked(ifp, ifgl, groupname);
1603 ifgr_group_get(void *ifgrp)
1605 union ifgroupreq_union *ifgrup;
1608 #ifdef COMPAT_FREEBSD32
1609 if (SV_CURPROC_FLAG(SV_ILP32))
1610 return (&ifgrup->ifgr32.ifgr_ifgru.ifgru_group[0]);
1612 return (&ifgrup->ifgr.ifgr_ifgru.ifgru_group[0]);
1615 static struct ifg_req *
1616 ifgr_groups_get(void *ifgrp)
1618 union ifgroupreq_union *ifgrup;
1621 #ifdef COMPAT_FREEBSD32
1622 if (SV_CURPROC_FLAG(SV_ILP32))
1623 return ((struct ifg_req *)(uintptr_t)
1624 ifgrup->ifgr32.ifgr_ifgru.ifgru_groups);
1626 return (ifgrup->ifgr.ifgr_ifgru.ifgru_groups);
1630 * Stores all groups from an interface in memory pointed to by ifgr.
1633 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp)
1636 struct ifg_list *ifgl;
1637 struct ifg_req ifgrq, *ifgp;
1641 if (ifgr->ifgr_len == 0) {
1642 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1643 ifgr->ifgr_len += sizeof(struct ifg_req);
1647 len = ifgr->ifgr_len;
1648 ifgp = ifgr_groups_get(ifgr);
1650 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1651 if (len < sizeof(ifgrq))
1653 bzero(&ifgrq, sizeof ifgrq);
1654 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1655 sizeof(ifgrq.ifgrq_group));
1656 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req))))
1658 len -= sizeof(ifgrq);
1666 * Stores all members of a group in memory pointed to by igfr
1669 if_getgroupmembers(struct ifgroupreq *ifgr)
1671 struct ifg_group *ifg;
1672 struct ifg_member *ifgm;
1673 struct ifg_req ifgrq, *ifgp;
1677 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1678 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0)
1685 if (ifgr->ifgr_len == 0) {
1686 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1687 ifgr->ifgr_len += sizeof(ifgrq);
1692 len = ifgr->ifgr_len;
1693 ifgp = ifgr_groups_get(ifgr);
1694 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1695 if (len < sizeof(ifgrq)) {
1699 bzero(&ifgrq, sizeof ifgrq);
1700 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1701 sizeof(ifgrq.ifgrq_member));
1702 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1706 len -= sizeof(ifgrq);
1715 * Return counter values from counter(9)s stored in ifnet.
1718 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1721 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1723 return (counter_u64_fetch(ifp->if_counters[cnt]));
1727 * Increase an ifnet counter. Usually used for counters shared
1728 * between the stack and a driver, but function supports them all.
1731 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1734 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1736 counter_u64_add(ifp->if_counters[cnt], inc);
1740 * Copy data from ifnet to userland API structure if_data.
1743 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1746 ifd->ifi_type = ifp->if_type;
1747 ifd->ifi_physical = 0;
1748 ifd->ifi_addrlen = ifp->if_addrlen;
1749 ifd->ifi_hdrlen = ifp->if_hdrlen;
1750 ifd->ifi_link_state = ifp->if_link_state;
1752 ifd->ifi_datalen = sizeof(struct if_data);
1753 ifd->ifi_mtu = ifp->if_mtu;
1754 ifd->ifi_metric = ifp->if_metric;
1755 ifd->ifi_baudrate = ifp->if_baudrate;
1756 ifd->ifi_hwassist = ifp->if_hwassist;
1757 ifd->ifi_epoch = ifp->if_epoch;
1758 ifd->ifi_lastchange = ifp->if_lastchange;
1760 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1761 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1762 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1763 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1764 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1765 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1766 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1767 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1768 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1769 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1770 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1771 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1775 * Initialization, destruction and refcounting functions for ifaddrs.
1778 ifa_alloc(size_t size, int flags)
1782 KASSERT(size >= sizeof(struct ifaddr),
1783 ("%s: invalid size %zu", __func__, size));
1785 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1789 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1791 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1793 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1795 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1798 refcount_init(&ifa->ifa_refcnt, 1);
1803 /* free(NULL) is okay */
1804 counter_u64_free(ifa->ifa_opackets);
1805 counter_u64_free(ifa->ifa_ipackets);
1806 counter_u64_free(ifa->ifa_obytes);
1807 counter_u64_free(ifa->ifa_ibytes);
1808 free(ifa, M_IFADDR);
1814 ifa_ref(struct ifaddr *ifa)
1817 refcount_acquire(&ifa->ifa_refcnt);
1821 ifa_destroy(epoch_context_t ctx)
1825 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx);
1826 counter_u64_free(ifa->ifa_opackets);
1827 counter_u64_free(ifa->ifa_ipackets);
1828 counter_u64_free(ifa->ifa_obytes);
1829 counter_u64_free(ifa->ifa_ibytes);
1830 free(ifa, M_IFADDR);
1834 ifa_free(struct ifaddr *ifa)
1837 if (refcount_release(&ifa->ifa_refcnt))
1838 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx);
1843 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1844 struct sockaddr *ia)
1846 struct rib_cmd_info rc;
1847 struct epoch_tracker et;
1849 struct rt_addrinfo info;
1850 struct sockaddr_dl null_sdl;
1852 struct ifaddr *rti_ifa = NULL;
1856 NET_EPOCH_ENTER(et);
1857 bzero(&info, sizeof(info));
1858 if (cmd != RTM_DELETE)
1859 info.rti_ifp = V_loif;
1860 if (cmd == RTM_ADD) {
1861 /* explicitly specify (loopback) ifa */
1862 if (info.rti_ifp != NULL) {
1863 rti_ifa = ifaof_ifpforaddr(ifa->ifa_addr, info.rti_ifp);
1864 if (rti_ifa != NULL)
1866 info.rti_ifa = rti_ifa;
1869 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED;
1870 info.rti_info[RTAX_DST] = ia;
1871 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1872 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1874 error = rib_action(ifp->if_fib, cmd, &info, &rc);
1877 if (rti_ifa != NULL)
1881 (cmd == RTM_ADD && error == EEXIST) ||
1882 (cmd == RTM_DELETE && (error == ENOENT || error == ESRCH)))
1885 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1886 __func__, otype, if_name(ifp), error);
1892 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1895 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1899 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1902 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1906 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1909 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1913 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1914 * structs used to represent other address families, it is necessary
1915 * to perform a different comparison.
1918 #define sa_dl_equal(a1, a2) \
1919 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1920 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1921 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1922 CLLADDR((const struct sockaddr_dl *)(a2)), \
1923 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1926 * Locate an interface based on a complete address.
1930 ifa_ifwithaddr(const struct sockaddr *addr)
1937 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1938 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1939 if (ifa->ifa_addr->sa_family != addr->sa_family)
1941 if (sa_equal(addr, ifa->ifa_addr)) {
1944 /* IP6 doesn't have broadcast */
1945 if ((ifp->if_flags & IFF_BROADCAST) &&
1946 ifa->ifa_broadaddr &&
1947 ifa->ifa_broadaddr->sa_len != 0 &&
1948 sa_equal(ifa->ifa_broadaddr, addr)) {
1959 ifa_ifwithaddr_check(const struct sockaddr *addr)
1961 struct epoch_tracker et;
1964 NET_EPOCH_ENTER(et);
1965 rc = (ifa_ifwithaddr(addr) != NULL);
1971 * Locate an interface based on the broadcast address.
1975 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1981 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1982 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1984 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1985 if (ifa->ifa_addr->sa_family != addr->sa_family)
1987 if ((ifp->if_flags & IFF_BROADCAST) &&
1988 ifa->ifa_broadaddr &&
1989 ifa->ifa_broadaddr->sa_len != 0 &&
1990 sa_equal(ifa->ifa_broadaddr, addr)) {
2001 * Locate the point to point interface with a given destination address.
2005 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
2011 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2012 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
2014 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2016 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2017 if (ifa->ifa_addr->sa_family != addr->sa_family)
2019 if (ifa->ifa_dstaddr != NULL &&
2020 sa_equal(addr, ifa->ifa_dstaddr)) {
2031 * Find an interface on a specific network. If many, choice
2032 * is most specific found.
2035 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
2039 struct ifaddr *ifa_maybe = NULL;
2040 u_int af = addr->sa_family;
2041 const char *addr_data = addr->sa_data, *cplim;
2045 * AF_LINK addresses can be looked up directly by their index number,
2046 * so do that if we can.
2048 if (af == AF_LINK) {
2049 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
2050 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
2051 return (ifaddr_byindex(sdl->sdl_index));
2055 * Scan though each interface, looking for ones that have addresses
2056 * in this address family and the requested fib.
2058 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2059 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
2061 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2062 const char *cp, *cp2, *cp3;
2064 if (ifa->ifa_addr->sa_family != af)
2066 if (af == AF_INET &&
2067 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
2069 * This is a bit broken as it doesn't
2070 * take into account that the remote end may
2071 * be a single node in the network we are
2073 * The trouble is that we don't know the
2074 * netmask for the remote end.
2076 if (ifa->ifa_dstaddr != NULL &&
2077 sa_equal(addr, ifa->ifa_dstaddr)) {
2082 * Scan all the bits in the ifa's address.
2083 * If a bit dissagrees with what we are
2084 * looking for, mask it with the netmask
2085 * to see if it really matters.
2086 * (A byte at a time)
2088 if (ifa->ifa_netmask == 0)
2091 cp2 = ifa->ifa_addr->sa_data;
2092 cp3 = ifa->ifa_netmask->sa_data;
2093 cplim = ifa->ifa_netmask->sa_len
2094 + (char *)ifa->ifa_netmask;
2096 if ((*cp++ ^ *cp2++) & *cp3++)
2097 goto next; /* next address! */
2099 * If the netmask of what we just found
2100 * is more specific than what we had before
2101 * (if we had one), or if the virtual status
2102 * of new prefix is better than of the old one,
2103 * then remember the new one before continuing
2104 * to search for an even better one.
2106 if (ifa_maybe == NULL ||
2107 ifa_preferred(ifa_maybe, ifa) ||
2108 rn_refines((caddr_t)ifa->ifa_netmask,
2109 (caddr_t)ifa_maybe->ifa_netmask)) {
2122 * Find an interface address specific to an interface best matching
2126 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
2129 const char *cp, *cp2, *cp3;
2131 struct ifaddr *ifa_maybe = NULL;
2132 u_int af = addr->sa_family;
2138 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2139 if (ifa->ifa_addr->sa_family != af)
2141 if (ifa_maybe == NULL)
2143 if (ifa->ifa_netmask == 0) {
2144 if (sa_equal(addr, ifa->ifa_addr) ||
2145 (ifa->ifa_dstaddr &&
2146 sa_equal(addr, ifa->ifa_dstaddr)))
2150 if (ifp->if_flags & IFF_POINTOPOINT) {
2151 if (sa_equal(addr, ifa->ifa_dstaddr))
2155 cp2 = ifa->ifa_addr->sa_data;
2156 cp3 = ifa->ifa_netmask->sa_data;
2157 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
2158 for (; cp3 < cplim; cp3++)
2159 if ((*cp++ ^ *cp2++) & *cp3)
2171 * See whether new ifa is better than current one:
2172 * 1) A non-virtual one is preferred over virtual.
2173 * 2) A virtual in master state preferred over any other state.
2175 * Used in several address selecting functions.
2178 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
2181 return (cur->ifa_carp && (!next->ifa_carp ||
2182 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
2185 struct sockaddr_dl *
2186 link_alloc_sdl(size_t size, int flags)
2189 return (malloc(size, M_TEMP, flags));
2193 link_free_sdl(struct sockaddr *sa)
2199 * Fills in given sdl with interface basic info.
2200 * Returns pointer to filled sdl.
2202 struct sockaddr_dl *
2203 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2205 struct sockaddr_dl *sdl;
2207 sdl = (struct sockaddr_dl *)paddr;
2208 memset(sdl, 0, sizeof(struct sockaddr_dl));
2209 sdl->sdl_len = sizeof(struct sockaddr_dl);
2210 sdl->sdl_family = AF_LINK;
2211 sdl->sdl_index = ifp->if_index;
2212 sdl->sdl_type = iftype;
2218 * Mark an interface down and notify protocols of
2222 if_unroute(struct ifnet *ifp, int flag, int fam)
2226 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2228 ifp->if_flags &= ~flag;
2229 getmicrotime(&ifp->if_lastchange);
2230 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2231 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2232 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2233 ifp->if_qflush(ifp);
2236 (*carp_linkstate_p)(ifp);
2241 * Mark an interface up and notify protocols of
2245 if_route(struct ifnet *ifp, int flag, int fam)
2249 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2251 ifp->if_flags |= flag;
2252 getmicrotime(&ifp->if_lastchange);
2253 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2254 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2255 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2257 (*carp_linkstate_p)(ifp);
2264 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2265 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2266 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2267 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2268 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2269 int (*vlan_pcp_p)(struct ifnet *, uint16_t *);
2270 int (*vlan_setcookie_p)(struct ifnet *, void *);
2271 void *(*vlan_cookie_p)(struct ifnet *);
2274 * Handle a change in the interface link state. To avoid LORs
2275 * between driver lock and upper layer locks, as well as possible
2276 * recursions, we post event to taskqueue, and all job
2277 * is done in static do_link_state_change().
2280 if_link_state_change(struct ifnet *ifp, int link_state)
2282 /* Return if state hasn't changed. */
2283 if (ifp->if_link_state == link_state)
2286 ifp->if_link_state = link_state;
2288 /* XXXGL: reference ifp? */
2289 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2293 do_link_state_change(void *arg, int pending)
2299 link_state = ifp->if_link_state;
2301 CURVNET_SET(ifp->if_vnet);
2303 if (ifp->if_vlantrunk != NULL)
2304 (*vlan_link_state_p)(ifp);
2306 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2307 ifp->if_l2com != NULL)
2308 (*ng_ether_link_state_p)(ifp, link_state);
2310 (*carp_linkstate_p)(ifp);
2312 ifp->if_bridge_linkstate(ifp);
2314 (*lagg_linkstate_p)(ifp, link_state);
2316 if (IS_DEFAULT_VNET(curvnet))
2317 devctl_notify("IFNET", ifp->if_xname,
2318 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2321 if_printf(ifp, "%d link states coalesced\n", pending);
2322 if (log_link_state_change)
2323 if_printf(ifp, "link state changed to %s\n",
2324 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2325 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state);
2330 * Mark an interface down and notify protocols of
2334 if_down(struct ifnet *ifp)
2337 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN);
2338 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2342 * Mark an interface up and notify protocols of
2346 if_up(struct ifnet *ifp)
2349 if_route(ifp, IFF_UP, AF_UNSPEC);
2350 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP);
2354 * Flush an interface queue.
2357 if_qflush(struct ifnet *ifp)
2365 if (ALTQ_IS_ENABLED(ifq))
2369 while ((m = n) != NULL) {
2380 * Map interface name to interface structure pointer, with or without
2381 * returning a reference.
2384 ifunit_ref(const char *name)
2386 struct epoch_tracker et;
2389 NET_EPOCH_ENTER(et);
2390 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2391 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2392 !(ifp->if_flags & IFF_DYING))
2402 ifunit(const char *name)
2404 struct epoch_tracker et;
2407 NET_EPOCH_ENTER(et);
2408 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2409 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2417 ifr_buffer_get_buffer(void *data)
2419 union ifreq_union *ifrup;
2422 #ifdef COMPAT_FREEBSD32
2423 if (SV_CURPROC_FLAG(SV_ILP32))
2424 return ((void *)(uintptr_t)
2425 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer);
2427 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer);
2431 ifr_buffer_set_buffer_null(void *data)
2433 union ifreq_union *ifrup;
2436 #ifdef COMPAT_FREEBSD32
2437 if (SV_CURPROC_FLAG(SV_ILP32))
2438 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0;
2441 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL;
2445 ifr_buffer_get_length(void *data)
2447 union ifreq_union *ifrup;
2450 #ifdef COMPAT_FREEBSD32
2451 if (SV_CURPROC_FLAG(SV_ILP32))
2452 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length);
2454 return (ifrup->ifr.ifr_ifru.ifru_buffer.length);
2458 ifr_buffer_set_length(void *data, size_t len)
2460 union ifreq_union *ifrup;
2463 #ifdef COMPAT_FREEBSD32
2464 if (SV_CURPROC_FLAG(SV_ILP32))
2465 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len;
2468 ifrup->ifr.ifr_ifru.ifru_buffer.length = len;
2472 ifr_data_get_ptr(void *ifrp)
2474 union ifreq_union *ifrup;
2477 #ifdef COMPAT_FREEBSD32
2478 if (SV_CURPROC_FLAG(SV_ILP32))
2479 return ((void *)(uintptr_t)
2480 ifrup->ifr32.ifr_ifru.ifru_data);
2482 return (ifrup->ifr.ifr_ifru.ifru_data);
2486 * Hardware specific interface ioctls.
2489 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2492 int error = 0, do_ifup = 0;
2493 int new_flags, temp_flags;
2494 size_t namelen, onamelen;
2496 char *descrbuf, *odescrbuf;
2497 char new_name[IFNAMSIZ];
2499 struct sockaddr_dl *sdl;
2501 ifr = (struct ifreq *)data;
2504 ifr->ifr_index = ifp->if_index;
2508 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2509 ifr->ifr_flags = temp_flags & 0xffff;
2510 ifr->ifr_flagshigh = temp_flags >> 16;
2514 ifr->ifr_reqcap = ifp->if_capabilities;
2515 ifr->ifr_curcap = ifp->if_capenable;
2520 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2525 ifr->ifr_metric = ifp->if_metric;
2529 ifr->ifr_mtu = ifp->if_mtu;
2533 /* XXXGL: did this ever worked? */
2539 sx_slock(&ifdescr_sx);
2540 if (ifp->if_description == NULL)
2543 /* space for terminating nul */
2544 descrlen = strlen(ifp->if_description) + 1;
2545 if (ifr_buffer_get_length(ifr) < descrlen)
2546 ifr_buffer_set_buffer_null(ifr);
2548 error = copyout(ifp->if_description,
2549 ifr_buffer_get_buffer(ifr), descrlen);
2550 ifr_buffer_set_length(ifr, descrlen);
2552 sx_sunlock(&ifdescr_sx);
2556 error = priv_check(td, PRIV_NET_SETIFDESCR);
2561 * Copy only (length-1) bytes to make sure that
2562 * if_description is always nul terminated. The
2563 * length parameter is supposed to count the
2564 * terminating nul in.
2566 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen)
2567 return (ENAMETOOLONG);
2568 else if (ifr_buffer_get_length(ifr) == 0)
2571 descrbuf = malloc(ifr_buffer_get_length(ifr),
2572 M_IFDESCR, M_WAITOK | M_ZERO);
2573 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf,
2574 ifr_buffer_get_length(ifr) - 1);
2576 free(descrbuf, M_IFDESCR);
2581 sx_xlock(&ifdescr_sx);
2582 odescrbuf = ifp->if_description;
2583 ifp->if_description = descrbuf;
2584 sx_xunlock(&ifdescr_sx);
2586 getmicrotime(&ifp->if_lastchange);
2587 free(odescrbuf, M_IFDESCR);
2591 ifr->ifr_fib = ifp->if_fib;
2595 error = priv_check(td, PRIV_NET_SETIFFIB);
2598 if (ifr->ifr_fib >= rt_numfibs)
2601 ifp->if_fib = ifr->ifr_fib;
2605 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2609 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2610 * check, so we don't need special handling here yet.
2612 new_flags = (ifr->ifr_flags & 0xffff) |
2613 (ifr->ifr_flagshigh << 16);
2614 if (ifp->if_flags & IFF_UP &&
2615 (new_flags & IFF_UP) == 0) {
2617 } else if (new_flags & IFF_UP &&
2618 (ifp->if_flags & IFF_UP) == 0) {
2621 /* See if permanently promiscuous mode bit is about to flip */
2622 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2623 if (new_flags & IFF_PPROMISC)
2624 ifp->if_flags |= IFF_PROMISC;
2625 else if (ifp->if_pcount == 0)
2626 ifp->if_flags &= ~IFF_PROMISC;
2627 if (log_promisc_mode_change)
2628 if_printf(ifp, "permanently promiscuous mode %s\n",
2629 ((new_flags & IFF_PPROMISC) ?
2630 "enabled" : "disabled"));
2632 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2633 (new_flags &~ IFF_CANTCHANGE);
2634 if (ifp->if_ioctl) {
2635 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2639 getmicrotime(&ifp->if_lastchange);
2643 error = priv_check(td, PRIV_NET_SETIFCAP);
2646 if (ifp->if_ioctl == NULL)
2647 return (EOPNOTSUPP);
2648 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2650 error = (*ifp->if_ioctl)(ifp, cmd, data);
2652 getmicrotime(&ifp->if_lastchange);
2657 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2662 error = priv_check(td, PRIV_NET_SETIFNAME);
2665 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ,
2669 if (new_name[0] == '\0')
2671 if (new_name[IFNAMSIZ-1] != '\0') {
2672 new_name[IFNAMSIZ-1] = '\0';
2673 if (strlen(new_name) == IFNAMSIZ-1)
2676 if (strcmp(new_name, ifp->if_xname) == 0)
2678 if (ifunit(new_name) != NULL)
2682 * XXX: Locking. Nothing else seems to lock if_flags,
2683 * and there are numerous other races with the
2684 * ifunit() checks not being atomic with namespace
2685 * changes (renames, vmoves, if_attach, etc).
2687 ifp->if_flags |= IFF_RENAMING;
2689 /* Announce the departure of the interface. */
2690 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2691 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2693 if_printf(ifp, "changing name to '%s'\n", new_name);
2696 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2698 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2699 namelen = strlen(new_name);
2700 onamelen = sdl->sdl_nlen;
2702 * Move the address if needed. This is safe because we
2703 * allocate space for a name of length IFNAMSIZ when we
2704 * create this in if_attach().
2706 if (namelen != onamelen) {
2707 bcopy(sdl->sdl_data + onamelen,
2708 sdl->sdl_data + namelen, sdl->sdl_alen);
2710 bcopy(new_name, sdl->sdl_data, namelen);
2711 sdl->sdl_nlen = namelen;
2712 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2713 bzero(sdl->sdl_data, onamelen);
2714 while (namelen != 0)
2715 sdl->sdl_data[--namelen] = 0xff;
2716 IF_ADDR_WUNLOCK(ifp);
2718 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2719 /* Announce the return of the interface. */
2720 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2722 ifp->if_flags &= ~IFF_RENAMING;
2727 error = priv_check(td, PRIV_NET_SETIFVNET);
2730 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2735 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2738 ifp->if_metric = ifr->ifr_metric;
2739 getmicrotime(&ifp->if_lastchange);
2743 error = priv_check(td, PRIV_NET_SETIFPHYS);
2746 if (ifp->if_ioctl == NULL)
2747 return (EOPNOTSUPP);
2748 error = (*ifp->if_ioctl)(ifp, cmd, data);
2750 getmicrotime(&ifp->if_lastchange);
2755 u_long oldmtu = ifp->if_mtu;
2757 error = priv_check(td, PRIV_NET_SETIFMTU);
2760 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2762 if (ifp->if_ioctl == NULL)
2763 return (EOPNOTSUPP);
2764 error = (*ifp->if_ioctl)(ifp, cmd, data);
2766 getmicrotime(&ifp->if_lastchange);
2769 DEBUGNET_NOTIFY_MTU(ifp);
2773 * If the link MTU changed, do network layer specific procedure.
2775 if (ifp->if_mtu != oldmtu) {
2786 if (cmd == SIOCADDMULTI)
2787 error = priv_check(td, PRIV_NET_ADDMULTI);
2789 error = priv_check(td, PRIV_NET_DELMULTI);
2793 /* Don't allow group membership on non-multicast interfaces. */
2794 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2795 return (EOPNOTSUPP);
2797 /* Don't let users screw up protocols' entries. */
2798 if (ifr->ifr_addr.sa_family != AF_LINK)
2801 if (cmd == SIOCADDMULTI) {
2802 struct epoch_tracker et;
2803 struct ifmultiaddr *ifma;
2806 * Userland is only permitted to join groups once
2807 * via the if_addmulti() KPI, because it cannot hold
2808 * struct ifmultiaddr * between calls. It may also
2809 * lose a race while we check if the membership
2812 NET_EPOCH_ENTER(et);
2813 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2818 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2820 error = if_delmulti(ifp, &ifr->ifr_addr);
2823 getmicrotime(&ifp->if_lastchange);
2826 case SIOCSIFPHYADDR:
2827 case SIOCDIFPHYADDR:
2829 case SIOCSIFPHYADDR_IN6:
2832 case SIOCSIFGENERIC:
2833 error = priv_check(td, PRIV_NET_HWIOCTL);
2836 if (ifp->if_ioctl == NULL)
2837 return (EOPNOTSUPP);
2838 error = (*ifp->if_ioctl)(ifp, cmd, data);
2840 getmicrotime(&ifp->if_lastchange);
2844 case SIOCGIFPSRCADDR:
2845 case SIOCGIFPDSTADDR:
2848 case SIOCGIFGENERIC:
2850 case SIOCGIFRSSHASH:
2851 case SIOCGIFDOWNREASON:
2852 if (ifp->if_ioctl == NULL)
2853 return (EOPNOTSUPP);
2854 error = (*ifp->if_ioctl)(ifp, cmd, data);
2858 error = priv_check(td, PRIV_NET_SETLLADDR);
2861 error = if_setlladdr(ifp,
2862 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2866 error = if_gethwaddr(ifp, ifr);
2869 case CASE_IOC_IFGROUPREQ(SIOCAIFGROUP):
2870 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2873 if ((error = if_addgroup(ifp,
2874 ifgr_group_get((struct ifgroupreq *)data))))
2878 case CASE_IOC_IFGROUPREQ(SIOCGIFGROUP):
2880 struct epoch_tracker et;
2882 NET_EPOCH_ENTER(et);
2883 error = if_getgroup((struct ifgroupreq *)data, ifp);
2888 case CASE_IOC_IFGROUPREQ(SIOCDIFGROUP):
2889 error = priv_check(td, PRIV_NET_DELIFGROUP);
2892 if ((error = if_delgroup(ifp,
2893 ifgr_group_get((struct ifgroupreq *)data))))
2904 #ifdef COMPAT_FREEBSD32
2912 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2915 #ifdef COMPAT_FREEBSD32
2917 ifmr_init(struct ifmediareq *ifmr, caddr_t data)
2919 struct ifmediareq32 *ifmr32;
2921 ifmr32 = (struct ifmediareq32 *)data;
2922 memcpy(ifmr->ifm_name, ifmr32->ifm_name,
2923 sizeof(ifmr->ifm_name));
2924 ifmr->ifm_current = ifmr32->ifm_current;
2925 ifmr->ifm_mask = ifmr32->ifm_mask;
2926 ifmr->ifm_status = ifmr32->ifm_status;
2927 ifmr->ifm_active = ifmr32->ifm_active;
2928 ifmr->ifm_count = ifmr32->ifm_count;
2929 ifmr->ifm_ulist = (int *)(uintptr_t)ifmr32->ifm_ulist;
2933 ifmr_update(const struct ifmediareq *ifmr, caddr_t data)
2935 struct ifmediareq32 *ifmr32;
2937 ifmr32 = (struct ifmediareq32 *)data;
2938 ifmr32->ifm_current = ifmr->ifm_current;
2939 ifmr32->ifm_mask = ifmr->ifm_mask;
2940 ifmr32->ifm_status = ifmr->ifm_status;
2941 ifmr32->ifm_active = ifmr->ifm_active;
2942 ifmr32->ifm_count = ifmr->ifm_count;
2950 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2952 #ifdef COMPAT_FREEBSD32
2953 caddr_t saved_data = NULL;
2954 struct ifmediareq ifmr;
2955 struct ifmediareq *ifmrp = NULL;
2965 CURVNET_SET(so->so_vnet);
2967 /* Make sure the VNET is stable. */
2968 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet);
2977 error = ifconf(cmd, data);
2980 #ifdef COMPAT_FREEBSD32
2983 struct ifconf32 *ifc32;
2986 ifc32 = (struct ifconf32 *)data;
2987 ifc.ifc_len = ifc32->ifc_len;
2988 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2990 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2992 ifc32->ifc_len = ifc.ifc_len;
2998 #ifdef COMPAT_FREEBSD32
3000 case SIOCGIFMEDIA32:
3001 case SIOCGIFXMEDIA32:
3003 ifmr_init(ifmrp, data);
3004 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq);
3006 data = (caddr_t)ifmrp;
3010 ifr = (struct ifreq *)data;
3014 error = priv_check(td, PRIV_NET_SETIFVNET);
3016 error = if_vmove_reclaim(td, ifr->ifr_name,
3022 error = priv_check(td, PRIV_NET_IFCREATE);
3024 error = if_clone_create(ifr->ifr_name,
3025 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ?
3026 ifr_data_get_ptr(ifr) : NULL);
3029 error = priv_check(td, PRIV_NET_IFDESTROY);
3031 error = if_clone_destroy(ifr->ifr_name);
3034 case SIOCIFGCLONERS:
3035 error = if_clone_list((struct if_clonereq *)data);
3038 case CASE_IOC_IFGROUPREQ(SIOCGIFGMEMB):
3039 error = if_getgroupmembers((struct ifgroupreq *)data);
3042 #if defined(INET) || defined(INET6)
3045 if (carp_ioctl_p == NULL)
3046 error = EPROTONOSUPPORT;
3048 error = (*carp_ioctl_p)(ifr, cmd, td);
3053 ifp = ifunit_ref(ifr->ifr_name);
3059 error = ifhwioctl(cmd, ifp, data, td);
3060 if (error != ENOIOCTL)
3063 oif_flags = ifp->if_flags;
3064 if (so->so_proto == NULL) {
3070 * Pass the request on to the socket control method, and if the
3071 * latter returns EOPNOTSUPP, directly to the interface.
3073 * Make an exception for the legacy SIOCSIF* requests. Drivers
3074 * trust SIOCSIFADDR et al to come from an already privileged
3075 * layer, and do not perform any credentials checks or input
3078 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
3080 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
3081 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
3082 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
3083 error = (*ifp->if_ioctl)(ifp, cmd, data);
3085 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
3087 if (ifp->if_flags & IFF_UP)
3095 #ifdef COMPAT_FREEBSD32
3096 if (ifmrp != NULL) {
3097 KASSERT((cmd == SIOCGIFMEDIA || cmd == SIOCGIFXMEDIA),
3098 ("ifmrp non-NULL, but cmd is not an ifmedia req 0x%lx",
3101 ifmr_update(ifmrp, data);
3109 * The code common to handling reference counted flags,
3110 * e.g., in ifpromisc() and if_allmulti().
3111 * The "pflag" argument can specify a permanent mode flag to check,
3112 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
3114 * Only to be used on stack-owned flags, not driver-owned flags.
3117 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
3121 int oldflags, oldcount;
3123 /* Sanity checks to catch programming errors */
3124 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
3125 ("%s: setting driver-owned flag %d", __func__, flag));
3128 KASSERT(*refcount >= 0,
3129 ("%s: increment negative refcount %d for flag %d",
3130 __func__, *refcount, flag));
3132 KASSERT(*refcount > 0,
3133 ("%s: decrement non-positive refcount %d for flag %d",
3134 __func__, *refcount, flag));
3136 /* In case this mode is permanent, just touch refcount */
3137 if (ifp->if_flags & pflag) {
3138 *refcount += onswitch ? 1 : -1;
3142 /* Save ifnet parameters for if_ioctl() may fail */
3143 oldcount = *refcount;
3144 oldflags = ifp->if_flags;
3147 * See if we aren't the only and touching refcount is enough.
3148 * Actually toggle interface flag if we are the first or last.
3153 ifp->if_flags |= flag;
3157 ifp->if_flags &= ~flag;
3160 /* Call down the driver since we've changed interface flags */
3161 if (ifp->if_ioctl == NULL) {
3165 ifr.ifr_flags = ifp->if_flags & 0xffff;
3166 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3167 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3170 /* Notify userland that interface flags have changed */
3175 /* Recover after driver error */
3176 *refcount = oldcount;
3177 ifp->if_flags = oldflags;
3182 * Set/clear promiscuous mode on interface ifp based on the truth value
3183 * of pswitch. The calls are reference counted so that only the first
3184 * "on" request actually has an effect, as does the final "off" request.
3185 * Results are undefined if the "off" and "on" requests are not matched.
3188 ifpromisc(struct ifnet *ifp, int pswitch)
3191 int oldflags = ifp->if_flags;
3193 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
3194 &ifp->if_pcount, pswitch);
3195 /* If promiscuous mode status has changed, log a message */
3196 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
3197 log_promisc_mode_change)
3198 if_printf(ifp, "promiscuous mode %s\n",
3199 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
3204 * Return interface configuration
3205 * of system. List may be used
3206 * in later ioctl's (above) to get
3207 * other information.
3211 ifconf(u_long cmd, caddr_t data)
3213 struct ifconf *ifc = (struct ifconf *)data;
3218 int error, full = 0, valid_len, max_len;
3220 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
3221 max_len = MAXPHYS - 1;
3223 /* Prevent hostile input from being able to crash the system */
3224 if (ifc->ifc_len <= 0)
3228 if (ifc->ifc_len <= max_len) {
3229 max_len = ifc->ifc_len;
3232 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
3237 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
3238 struct epoch_tracker et;
3242 * Zero the ifr to make sure we don't disclose the contents
3245 memset(&ifr, 0, sizeof(ifr));
3247 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
3248 >= sizeof(ifr.ifr_name)) {
3251 return (ENAMETOOLONG);
3255 NET_EPOCH_ENTER(et);
3256 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
3257 struct sockaddr *sa = ifa->ifa_addr;
3259 if (prison_if(curthread->td_ucred, sa) != 0)
3262 if (sa->sa_len <= sizeof(*sa)) {
3263 if (sa->sa_len < sizeof(*sa)) {
3264 memset(&ifr.ifr_ifru.ifru_addr, 0,
3265 sizeof(ifr.ifr_ifru.ifru_addr));
3266 memcpy(&ifr.ifr_ifru.ifru_addr, sa,
3269 ifr.ifr_ifru.ifru_addr = *sa;
3270 sbuf_bcat(sb, &ifr, sizeof(ifr));
3271 max_len += sizeof(ifr);
3274 offsetof(struct ifreq, ifr_addr));
3275 max_len += offsetof(struct ifreq, ifr_addr);
3276 sbuf_bcat(sb, sa, sa->sa_len);
3277 max_len += sa->sa_len;
3280 if (sbuf_error(sb) == 0)
3281 valid_len = sbuf_len(sb);
3285 sbuf_bcat(sb, &ifr, sizeof(ifr));
3286 max_len += sizeof(ifr);
3288 if (sbuf_error(sb) == 0)
3289 valid_len = sbuf_len(sb);
3295 * If we didn't allocate enough space (uncommon), try again. If
3296 * we have already allocated as much space as we are allowed,
3297 * return what we've got.
3299 if (valid_len != max_len && !full) {
3304 ifc->ifc_len = valid_len;
3306 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
3312 * Just like ifpromisc(), but for all-multicast-reception mode.
3315 if_allmulti(struct ifnet *ifp, int onswitch)
3318 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
3321 struct ifmultiaddr *
3322 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
3324 struct ifmultiaddr *ifma;
3326 IF_ADDR_LOCK_ASSERT(ifp);
3328 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
3329 if (sa->sa_family == AF_LINK) {
3330 if (sa_dl_equal(ifma->ifma_addr, sa))
3333 if (sa_equal(ifma->ifma_addr, sa))
3342 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
3343 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
3344 * the ifnet multicast address list here, so the caller must do that and
3345 * other setup work (such as notifying the device driver). The reference
3346 * count is initialized to 1.
3348 static struct ifmultiaddr *
3349 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
3352 struct ifmultiaddr *ifma;
3353 struct sockaddr *dupsa;
3355 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3360 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3361 if (dupsa == NULL) {
3362 free(ifma, M_IFMADDR);
3365 bcopy(sa, dupsa, sa->sa_len);
3366 ifma->ifma_addr = dupsa;
3368 ifma->ifma_ifp = ifp;
3369 ifma->ifma_refcount = 1;
3370 ifma->ifma_protospec = NULL;
3373 ifma->ifma_lladdr = NULL;
3377 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3378 if (dupsa == NULL) {
3379 free(ifma->ifma_addr, M_IFMADDR);
3380 free(ifma, M_IFMADDR);
3383 bcopy(llsa, dupsa, llsa->sa_len);
3384 ifma->ifma_lladdr = dupsa;
3390 * if_freemulti: free ifmultiaddr structure and possibly attached related
3391 * addresses. The caller is responsible for implementing reference
3392 * counting, notifying the driver, handling routing messages, and releasing
3393 * any dependent link layer state.
3395 #ifdef MCAST_VERBOSE
3396 extern void kdb_backtrace(void);
3399 if_freemulti_internal(struct ifmultiaddr *ifma)
3402 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3403 ifma->ifma_refcount));
3405 if (ifma->ifma_lladdr != NULL)
3406 free(ifma->ifma_lladdr, M_IFMADDR);
3407 #ifdef MCAST_VERBOSE
3409 printf("%s freeing ifma: %p\n", __func__, ifma);
3411 free(ifma->ifma_addr, M_IFMADDR);
3412 free(ifma, M_IFMADDR);
3416 if_destroymulti(epoch_context_t ctx)
3418 struct ifmultiaddr *ifma;
3420 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx);
3421 if_freemulti_internal(ifma);
3425 if_freemulti(struct ifmultiaddr *ifma)
3427 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d",
3428 ifma->ifma_refcount));
3430 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx);
3435 * Register an additional multicast address with a network interface.
3437 * - If the address is already present, bump the reference count on the
3438 * address and return.
3439 * - If the address is not link-layer, look up a link layer address.
3440 * - Allocate address structures for one or both addresses, and attach to the
3441 * multicast address list on the interface. If automatically adding a link
3442 * layer address, the protocol address will own a reference to the link
3443 * layer address, to be freed when it is freed.
3444 * - Notify the network device driver of an addition to the multicast address
3447 * 'sa' points to caller-owned memory with the desired multicast address.
3449 * 'retifma' will be used to return a pointer to the resulting multicast
3450 * address reference, if desired.
3453 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3454 struct ifmultiaddr **retifma)
3456 struct ifmultiaddr *ifma, *ll_ifma;
3457 struct sockaddr *llsa;
3458 struct sockaddr_dl sdl;
3462 IN_MULTI_LIST_UNLOCK_ASSERT();
3465 IN6_MULTI_LIST_UNLOCK_ASSERT();
3468 * If the address is already present, return a new reference to it;
3469 * otherwise, allocate storage and set up a new address.
3472 ifma = if_findmulti(ifp, sa);
3474 ifma->ifma_refcount++;
3475 if (retifma != NULL)
3477 IF_ADDR_WUNLOCK(ifp);
3482 * The address isn't already present; resolve the protocol address
3483 * into a link layer address, and then look that up, bump its
3484 * refcount or allocate an ifma for that also.
3485 * Most link layer resolving functions returns address data which
3486 * fits inside default sockaddr_dl structure. However callback
3487 * can allocate another sockaddr structure, in that case we need to
3492 if (ifp->if_resolvemulti != NULL) {
3493 /* Provide called function with buffer size information */
3494 sdl.sdl_len = sizeof(sdl);
3495 llsa = (struct sockaddr *)&sdl;
3496 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3502 * Allocate the new address. Don't hook it up yet, as we may also
3503 * need to allocate a link layer multicast address.
3505 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3512 * If a link layer address is found, we'll need to see if it's
3513 * already present in the address list, or allocate is as well.
3514 * When this block finishes, the link layer address will be on the
3518 ll_ifma = if_findmulti(ifp, llsa);
3519 if (ll_ifma == NULL) {
3520 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3521 if (ll_ifma == NULL) {
3522 --ifma->ifma_refcount;
3527 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED;
3528 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3531 ll_ifma->ifma_refcount++;
3532 ifma->ifma_llifma = ll_ifma;
3536 * We now have a new multicast address, ifma, and possibly a new or
3537 * referenced link layer address. Add the primary address to the
3538 * ifnet address list.
3540 ifma->ifma_flags |= IFMA_F_ENQUEUED;
3541 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3543 if (retifma != NULL)
3547 * Must generate the message while holding the lock so that 'ifma'
3548 * pointer is still valid.
3550 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3551 IF_ADDR_WUNLOCK(ifp);
3554 * We are certain we have added something, so call down to the
3555 * interface to let them know about it.
3557 if (ifp->if_ioctl != NULL) {
3558 if (THREAD_CAN_SLEEP())
3559 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3561 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask);
3564 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3565 link_free_sdl(llsa);
3570 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3571 link_free_sdl(llsa);
3574 IF_ADDR_WUNLOCK(ifp);
3579 if_siocaddmulti(void *arg, int pending)
3586 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending);
3588 CURVNET_SET(ifp->if_vnet);
3589 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3594 * Delete a multicast group membership by network-layer group address.
3596 * Returns ENOENT if the entry could not be found. If ifp no longer
3597 * exists, results are undefined. This entry point should only be used
3598 * from subsystems which do appropriate locking to hold ifp for the
3599 * duration of the call.
3600 * Network-layer protocol domains must use if_delmulti_ifma().
3603 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3605 struct ifmultiaddr *ifma;
3608 KASSERT(ifp, ("%s: NULL ifp", __func__));
3612 ifma = if_findmulti(ifp, sa);
3614 lastref = if_delmulti_locked(ifp, ifma, 0);
3615 IF_ADDR_WUNLOCK(ifp);
3620 if (lastref && ifp->if_ioctl != NULL) {
3621 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3628 * Delete all multicast group membership for an interface.
3629 * Should be used to quickly flush all multicast filters.
3632 if_delallmulti(struct ifnet *ifp)
3634 struct ifmultiaddr *ifma;
3635 struct ifmultiaddr *next;
3638 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3639 if_delmulti_locked(ifp, ifma, 0);
3640 IF_ADDR_WUNLOCK(ifp);
3644 if_delmulti_ifma(struct ifmultiaddr *ifma)
3646 if_delmulti_ifma_flags(ifma, 0);
3650 * Delete a multicast group membership by group membership pointer.
3651 * Network-layer protocol domains must use this routine.
3653 * It is safe to call this routine if the ifp disappeared.
3656 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags)
3660 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma);
3662 IN_MULTI_LIST_UNLOCK_ASSERT();
3664 ifp = ifma->ifma_ifp;
3667 printf("%s: ifma_ifp seems to be detached\n", __func__);
3669 struct epoch_tracker et;
3672 NET_EPOCH_ENTER(et);
3673 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link)
3682 * If and only if the ifnet instance exists: Acquire the address lock.
3687 lastref = if_delmulti_locked(ifp, ifma, flags);
3691 * If and only if the ifnet instance exists:
3692 * Release the address lock.
3693 * If the group was left: update the hardware hash filter.
3695 IF_ADDR_WUNLOCK(ifp);
3696 if (lastref && ifp->if_ioctl != NULL) {
3697 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3703 * Perform deletion of network-layer and/or link-layer multicast address.
3705 * Return 0 if the reference count was decremented.
3706 * Return 1 if the final reference was released, indicating that the
3707 * hardware hash filter should be reprogrammed.
3710 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3712 struct ifmultiaddr *ll_ifma;
3714 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3715 KASSERT(ifma->ifma_ifp == ifp,
3716 ("%s: inconsistent ifp %p", __func__, ifp));
3717 IF_ADDR_WLOCK_ASSERT(ifp);
3720 ifp = ifma->ifma_ifp;
3721 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : "");
3724 * If the ifnet is detaching, null out references to ifnet,
3725 * so that upper protocol layers will notice, and not attempt
3726 * to obtain locks for an ifnet which no longer exists. The
3727 * routing socket announcement must happen before the ifnet
3728 * instance is detached from the system.
3732 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3735 * ifp may already be nulled out if we are being reentered
3736 * to delete the ll_ifma.
3739 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3740 ifma->ifma_ifp = NULL;
3744 if (--ifma->ifma_refcount > 0)
3747 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) {
3748 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link);
3749 ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3752 * If this ifma is a network-layer ifma, a link-layer ifma may
3753 * have been associated with it. Release it first if so.
3755 ll_ifma = ifma->ifma_llifma;
3756 if (ll_ifma != NULL) {
3757 KASSERT(ifma->ifma_lladdr != NULL,
3758 ("%s: llifma w/o lladdr", __func__));
3760 ll_ifma->ifma_ifp = NULL; /* XXX */
3761 if (--ll_ifma->ifma_refcount == 0) {
3763 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) {
3764 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr,
3766 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED;
3769 if_freemulti(ll_ifma);
3774 struct ifmultiaddr *ifmatmp;
3776 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link)
3777 MPASS(ifma != ifmatmp);
3782 * The last reference to this instance of struct ifmultiaddr
3783 * was released; the hardware should be notified of this change.
3789 * Set the link layer address on an interface.
3791 * At this time we only support certain types of interfaces,
3792 * and we don't allow the length of the address to change.
3794 * Set noinline to be dtrace-friendly
3797 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3799 struct sockaddr_dl *sdl;
3807 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3811 if (len != sdl->sdl_alen) /* don't allow length to change */
3814 switch (ifp->if_type) {
3819 case IFT_IEEE8023ADLAG:
3820 bcopy(lladdr, LLADDR(sdl), len);
3827 * If the interface is already up, we need
3828 * to re-init it in order to reprogram its
3831 if ((ifp->if_flags & IFF_UP) != 0) {
3832 if (ifp->if_ioctl) {
3833 ifp->if_flags &= ~IFF_UP;
3834 ifr.ifr_flags = ifp->if_flags & 0xffff;
3835 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3836 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3837 ifp->if_flags |= IFF_UP;
3838 ifr.ifr_flags = ifp->if_flags & 0xffff;
3839 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3840 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3843 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3849 * Compat function for handling basic encapsulation requests.
3850 * Not converted stacks (FDDI, IB, ..) supports traditional
3851 * output model: ARP (and other similar L2 protocols) are handled
3852 * inside output routine, arpresolve/nd6_resolve() returns MAC
3853 * address instead of full prepend.
3855 * This function creates calculated header==MAC for IPv4/IPv6 and
3856 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3860 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3863 if (req->rtype != IFENCAP_LL)
3864 return (EOPNOTSUPP);
3866 if (req->bufsize < req->lladdr_len)
3869 switch (req->family) {
3874 return (EAFNOSUPPORT);
3877 /* Copy lladdr to storage as is */
3878 memmove(req->buf, req->lladdr, req->lladdr_len);
3879 req->bufsize = req->lladdr_len;
3880 req->lladdr_off = 0;
3886 * Tunnel interfaces can nest, also they may cause infinite recursion
3887 * calls when misconfigured. We'll prevent this by detecting loops.
3888 * High nesting level may cause stack exhaustion. We'll prevent this
3889 * by introducing upper limit.
3891 * Return 0, if tunnel nesting count is equal or less than limit.
3894 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie,
3902 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) {
3903 if (*(struct ifnet **)(mtag + 1) == ifp) {
3904 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp));
3909 if (count > limit) {
3911 "%s: if_output recursively called too many times(%d)\n",
3912 if_name(ifp), count);
3915 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT);
3918 *(struct ifnet **)(mtag + 1) = ifp;
3919 m_tag_prepend(m, mtag);
3924 * Get the link layer address that was read from the hardware at attach.
3926 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type
3927 * their component interfaces as IFT_IEEE8023ADLAG.
3930 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr)
3933 if (ifp->if_hw_addr == NULL)
3936 switch (ifp->if_type) {
3938 case IFT_IEEE8023ADLAG:
3939 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen);
3947 * The name argument must be a pointer to storage which will last as
3948 * long as the interface does. For physical devices, the result of
3949 * device_get_name(dev) is a good choice and for pseudo-devices a
3950 * static string works well.
3953 if_initname(struct ifnet *ifp, const char *name, int unit)
3955 ifp->if_dname = name;
3956 ifp->if_dunit = unit;
3957 if (unit != IF_DUNIT_NONE)
3958 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3960 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3964 if_printf(struct ifnet *ifp, const char *fmt, ...)
3969 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt);
3971 vlog(LOG_INFO, if_fmt, ap);
3977 if_start(struct ifnet *ifp)
3980 (*(ifp)->if_start)(ifp);
3984 * Backwards compatibility interface for drivers
3985 * that have not implemented it
3988 if_transmit(struct ifnet *ifp, struct mbuf *m)
3992 IFQ_HANDOFF(ifp, m, error);
3997 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
4004 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
4009 if (_IF_QFULL(ifq)) {
4011 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
4016 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
4017 if (m->m_flags & (M_BCAST|M_MCAST))
4018 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
4019 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
4021 _IF_ENQUEUE(ifq, m);
4023 if (ifp != NULL && !active)
4024 (*(ifp)->if_start)(ifp);
4029 if_register_com_alloc(u_char type,
4030 if_com_alloc_t *a, if_com_free_t *f)
4033 KASSERT(if_com_alloc[type] == NULL,
4034 ("if_register_com_alloc: %d already registered", type));
4035 KASSERT(if_com_free[type] == NULL,
4036 ("if_register_com_alloc: %d free already registered", type));
4038 if_com_alloc[type] = a;
4039 if_com_free[type] = f;
4043 if_deregister_com_alloc(u_char type)
4046 KASSERT(if_com_alloc[type] != NULL,
4047 ("if_deregister_com_alloc: %d not registered", type));
4048 KASSERT(if_com_free[type] != NULL,
4049 ("if_deregister_com_alloc: %d free not registered", type));
4050 if_com_alloc[type] = NULL;
4051 if_com_free[type] = NULL;
4054 /* API for driver access to network stack owned ifnet.*/
4056 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
4060 oldbrate = ifp->if_baudrate;
4061 ifp->if_baudrate = baudrate;
4066 if_getbaudrate(if_t ifp)
4069 return (((struct ifnet *)ifp)->if_baudrate);
4073 if_setcapabilities(if_t ifp, int capabilities)
4075 ((struct ifnet *)ifp)->if_capabilities = capabilities;
4080 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
4082 ((struct ifnet *)ifp)->if_capabilities |= setbit;
4083 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
4089 if_getcapabilities(if_t ifp)
4091 return ((struct ifnet *)ifp)->if_capabilities;
4095 if_setcapenable(if_t ifp, int capabilities)
4097 ((struct ifnet *)ifp)->if_capenable = capabilities;
4102 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
4105 ((struct ifnet *)ifp)->if_capenable |= setcap;
4107 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
4113 if_getdname(if_t ifp)
4115 return ((struct ifnet *)ifp)->if_dname;
4119 if_togglecapenable(if_t ifp, int togglecap)
4121 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
4126 if_getcapenable(if_t ifp)
4128 return ((struct ifnet *)ifp)->if_capenable;
4132 * This is largely undesirable because it ties ifnet to a device, but does
4133 * provide flexiblity for an embedded product vendor. Should be used with
4134 * the understanding that it violates the interface boundaries, and should be
4135 * a last resort only.
4138 if_setdev(if_t ifp, void *dev)
4144 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
4146 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
4147 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
4153 if_getdrvflags(if_t ifp)
4155 return ((struct ifnet *)ifp)->if_drv_flags;
4159 if_setdrvflags(if_t ifp, int flags)
4161 ((struct ifnet *)ifp)->if_drv_flags = flags;
4167 if_setflags(if_t ifp, int flags)
4170 ifp->if_flags = flags;
4175 if_setflagbits(if_t ifp, int set, int clear)
4177 ((struct ifnet *)ifp)->if_flags |= set;
4178 ((struct ifnet *)ifp)->if_flags &= ~clear;
4184 if_getflags(if_t ifp)
4186 return ((struct ifnet *)ifp)->if_flags;
4190 if_clearhwassist(if_t ifp)
4192 ((struct ifnet *)ifp)->if_hwassist = 0;
4197 if_sethwassistbits(if_t ifp, int toset, int toclear)
4199 ((struct ifnet *)ifp)->if_hwassist |= toset;
4200 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
4206 if_sethwassist(if_t ifp, int hwassist_bit)
4208 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
4213 if_gethwassist(if_t ifp)
4215 return ((struct ifnet *)ifp)->if_hwassist;
4219 if_setmtu(if_t ifp, int mtu)
4221 ((struct ifnet *)ifp)->if_mtu = mtu;
4228 return ((struct ifnet *)ifp)->if_mtu;
4232 if_getmtu_family(if_t ifp, int family)
4236 for (dp = domains; dp; dp = dp->dom_next) {
4237 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
4238 return (dp->dom_ifmtu((struct ifnet *)ifp));
4241 return (((struct ifnet *)ifp)->if_mtu);
4245 * Methods for drivers to access interface unicast and multicast
4246 * link level addresses. Driver shall not know 'struct ifaddr' neither
4247 * 'struct ifmultiaddr'.
4250 if_lladdr_count(if_t ifp)
4252 struct epoch_tracker et;
4257 NET_EPOCH_ENTER(et);
4258 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
4259 if (ifa->ifa_addr->sa_family == AF_LINK)
4267 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4269 struct epoch_tracker et;
4276 NET_EPOCH_ENTER(et);
4277 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
4278 if (ifa->ifa_addr->sa_family != AF_LINK)
4280 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr,
4289 if_llmaddr_count(if_t ifp)
4291 struct epoch_tracker et;
4292 struct ifmultiaddr *ifma;
4296 NET_EPOCH_ENTER(et);
4297 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
4298 if (ifma->ifma_addr->sa_family == AF_LINK)
4306 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg)
4308 struct epoch_tracker et;
4309 struct ifmultiaddr *ifma;
4315 NET_EPOCH_ENTER(et);
4316 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
4317 if (ifma->ifma_addr->sa_family != AF_LINK)
4319 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr,
4328 if_setsoftc(if_t ifp, void *softc)
4330 ((struct ifnet *)ifp)->if_softc = softc;
4335 if_getsoftc(if_t ifp)
4337 return ((struct ifnet *)ifp)->if_softc;
4341 if_setrcvif(struct mbuf *m, if_t ifp)
4344 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0);
4345 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
4349 if_setvtag(struct mbuf *m, uint16_t tag)
4351 m->m_pkthdr.ether_vtag = tag;
4355 if_getvtag(struct mbuf *m)
4358 return (m->m_pkthdr.ether_vtag);
4362 if_sendq_empty(if_t ifp)
4364 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
4368 if_getifaddr(if_t ifp)
4370 return ((struct ifnet *)ifp)->if_addr;
4374 if_getamcount(if_t ifp)
4376 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);