2 * Copyright (c) 1980, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
37 #include <sys/param.h>
38 #include <sys/types.h>
40 #include <sys/malloc.h>
44 #include <sys/systm.h>
47 #include <sys/socket.h>
48 #include <sys/socketvar.h>
49 #include <sys/protosw.h>
50 #include <sys/kernel.h>
52 #include <sys/refcount.h>
53 #include <sys/module.h>
54 #include <sys/rwlock.h>
55 #include <sys/sockio.h>
56 #include <sys/syslog.h>
57 #include <sys/sysctl.h>
58 #include <sys/taskqueue.h>
59 #include <sys/domain.h>
63 #include <machine/stdarg.h>
67 #include <net/ethernet.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_dl.h>
72 #include <net/if_types.h>
73 #include <net/if_var.h>
74 #include <net/if_media.h>
75 #include <net/if_vlan_var.h>
76 #include <net/radix.h>
77 #include <net/route.h>
80 #if defined(INET) || defined(INET6)
81 #include <net/ethernet.h>
82 #include <netinet/in.h>
83 #include <netinet/in_var.h>
84 #include <netinet/ip.h>
85 #include <netinet/ip_carp.h>
87 #include <netinet/if_ether.h>
90 #include <netinet6/in6_var.h>
91 #include <netinet6/in6_ifattach.h>
93 #endif /* INET || INET6 */
95 #include <security/mac/mac_framework.h>
97 #ifdef COMPAT_FREEBSD32
98 #include <sys/mount.h>
99 #include <compat/freebsd32/freebsd32.h>
102 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
103 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
105 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN,
106 &ifqmaxlen, 0, "max send queue size");
108 /* Log link state change events */
109 static int log_link_state_change = 1;
111 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
112 &log_link_state_change, 0,
113 "log interface link state change events");
115 /* Log promiscuous mode change events */
116 static int log_promisc_mode_change = 1;
118 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RW,
119 &log_promisc_mode_change, 1,
120 "log promiscuous mode change events");
122 /* Interface description */
123 static unsigned int ifdescr_maxlen = 1024;
124 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW,
126 "administrative maximum length for interface description");
128 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions");
130 /* global sx for non-critical path ifdescr */
131 static struct sx ifdescr_sx;
132 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr");
134 void (*bridge_linkstate_p)(struct ifnet *ifp);
135 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
136 void (*lagg_linkstate_p)(struct ifnet *ifp, int state);
137 /* These are external hooks for CARP. */
138 void (*carp_linkstate_p)(struct ifnet *ifp);
139 void (*carp_demote_adj_p)(int, char *);
140 int (*carp_master_p)(struct ifaddr *);
141 #if defined(INET) || defined(INET6)
142 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost);
143 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m,
144 const struct sockaddr *sa);
145 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *);
146 int (*carp_attach_p)(struct ifaddr *, int);
147 void (*carp_detach_p)(struct ifaddr *);
150 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **);
153 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6);
154 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m,
155 const struct in6_addr *taddr);
158 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
161 * XXX: Style; these should be sorted alphabetically, and unprototyped
162 * static functions should be prototyped. Currently they are sorted by
165 static void if_attachdomain(void *);
166 static void if_attachdomain1(struct ifnet *);
167 static int ifconf(u_long, caddr_t);
168 static void if_freemulti(struct ifmultiaddr *);
169 static void if_grow(void);
170 static void if_input_default(struct ifnet *, struct mbuf *);
171 static int if_requestencap_default(struct ifnet *, struct if_encap_req *);
172 static void if_route(struct ifnet *, int flag, int fam);
173 static int if_setflag(struct ifnet *, int, int, int *, int);
174 static int if_transmit(struct ifnet *ifp, struct mbuf *m);
175 static void if_unroute(struct ifnet *, int flag, int fam);
176 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
177 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
178 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int);
179 static void do_link_state_change(void *, int);
180 static int if_getgroup(struct ifgroupreq *, struct ifnet *);
181 static int if_getgroupmembers(struct ifgroupreq *);
182 static void if_delgroups(struct ifnet *);
183 static void if_attach_internal(struct ifnet *, int, struct if_clone *);
184 static int if_detach_internal(struct ifnet *, int, struct if_clone **);
186 static void if_vmove(struct ifnet *, struct vnet *);
191 * XXX: declare here to avoid to include many inet6 related files..
192 * should be more generalized?
194 extern void nd6_setmtu(struct ifnet *);
197 /* ipsec helper hooks */
198 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]);
199 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]);
201 VNET_DEFINE(int, if_index);
202 int ifqmaxlen = IFQ_MAXLEN;
203 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */
204 VNET_DEFINE(struct ifgrouphead, ifg_head);
206 static VNET_DEFINE(int, if_indexlim) = 8;
208 /* Table of ifnet by index. */
209 VNET_DEFINE(struct ifnet **, ifindex_table);
211 #define V_if_indexlim VNET(if_indexlim)
212 #define V_ifindex_table VNET(ifindex_table)
215 * The global network interface list (V_ifnet) and related state (such as
216 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and
217 * an rwlock. Either may be acquired shared to stablize the list, but both
218 * must be acquired writable to modify the list. This model allows us to
219 * both stablize the interface list during interrupt thread processing, but
220 * also to stablize it over long-running ioctls, without introducing priority
221 * inversions and deadlocks.
223 struct rwlock ifnet_rwlock;
224 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE);
225 struct sx ifnet_sxlock;
226 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE);
229 * The allocation of network interfaces is a rather non-atomic affair; we
230 * need to select an index before we are ready to expose the interface for
231 * use, so will use this pointer value to indicate reservation.
233 #define IFNET_HOLD (void *)(uintptr_t)(-1)
235 static if_com_alloc_t *if_com_alloc[256];
236 static if_com_free_t *if_com_free[256];
238 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
239 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
240 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
243 ifnet_byindex_locked(u_short idx)
246 if (idx > V_if_index)
248 if (V_ifindex_table[idx] == IFNET_HOLD)
250 return (V_ifindex_table[idx]);
254 ifnet_byindex(u_short idx)
258 IFNET_RLOCK_NOSLEEP();
259 ifp = ifnet_byindex_locked(idx);
260 IFNET_RUNLOCK_NOSLEEP();
265 ifnet_byindex_ref(u_short idx)
269 IFNET_RLOCK_NOSLEEP();
270 ifp = ifnet_byindex_locked(idx);
271 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) {
272 IFNET_RUNLOCK_NOSLEEP();
276 IFNET_RUNLOCK_NOSLEEP();
281 * Allocate an ifindex array entry; return 0 on success or an error on
289 IFNET_WLOCK_ASSERT();
292 * Try to find an empty slot below V_if_index. If we fail, take the
295 for (idx = 1; idx <= V_if_index; idx++) {
296 if (V_ifindex_table[idx] == NULL)
300 /* Catch if_index overflow. */
301 if (idx >= V_if_indexlim) {
305 if (idx > V_if_index)
311 ifindex_free_locked(u_short idx)
314 IFNET_WLOCK_ASSERT();
316 V_ifindex_table[idx] = NULL;
317 while (V_if_index > 0 &&
318 V_ifindex_table[V_if_index] == NULL)
323 ifindex_free(u_short idx)
327 ifindex_free_locked(idx);
332 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp)
335 IFNET_WLOCK_ASSERT();
337 V_ifindex_table[idx] = ifp;
341 ifnet_setbyindex(u_short idx, struct ifnet *ifp)
345 ifnet_setbyindex_locked(idx, ifp);
350 ifaddr_byindex(u_short idx)
353 struct ifaddr *ifa = NULL;
355 IFNET_RLOCK_NOSLEEP();
356 ifp = ifnet_byindex_locked(idx);
357 if (ifp != NULL && (ifa = ifp->if_addr) != NULL)
359 IFNET_RUNLOCK_NOSLEEP();
364 * Network interface utility routines.
366 * Routines with ifa_ifwith* names take sockaddr *'s as
371 vnet_if_init(const void *unused __unused)
374 TAILQ_INIT(&V_ifnet);
375 TAILQ_INIT(&V_ifg_head);
377 if_grow(); /* create initial table */
379 vnet_if_clone_init();
381 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init,
386 vnet_if_uninit(const void *unused __unused)
389 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p "
390 "not empty", __func__, __LINE__, &V_ifnet));
391 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p "
392 "not empty", __func__, __LINE__, &V_ifg_head));
394 free((caddr_t)V_ifindex_table, M_IFNET);
396 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST,
397 vnet_if_uninit, NULL);
400 vnet_if_return(const void *unused __unused)
402 struct ifnet *ifp, *nifp;
404 /* Return all inherited interfaces to their parent vnets. */
405 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) {
406 if (ifp->if_home_vnet != ifp->if_vnet)
407 if_vmove(ifp, ifp->if_home_vnet);
410 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY,
411 vnet_if_return, NULL);
421 IFNET_WLOCK_ASSERT();
422 oldlim = V_if_indexlim;
424 n = (oldlim << 1) * sizeof(*e);
425 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
427 if (V_if_indexlim != oldlim) {
431 if (V_ifindex_table != NULL) {
432 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2);
433 free((caddr_t)V_ifindex_table, M_IFNET);
440 * Allocate a struct ifnet and an index for an interface. A layer 2
441 * common structure will also be allocated if an allocation routine is
442 * registered for the passed type.
445 if_alloc(u_char type)
450 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
452 idx = ifindex_alloc();
453 ifnet_setbyindex_locked(idx, IFNET_HOLD);
457 ifp->if_alloctype = type;
458 if (if_com_alloc[type] != NULL) {
459 ifp->if_l2com = if_com_alloc[type](type, ifp);
460 if (ifp->if_l2com == NULL) {
467 IF_ADDR_LOCK_INIT(ifp);
468 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
469 ifp->if_afdata_initialized = 0;
470 IF_AFDATA_LOCK_INIT(ifp);
471 TAILQ_INIT(&ifp->if_addrhead);
472 TAILQ_INIT(&ifp->if_multiaddrs);
473 TAILQ_INIT(&ifp->if_groups);
477 ifq_init(&ifp->if_snd, ifp);
479 refcount_init(&ifp->if_refcount, 1); /* Index reference. */
480 for (int i = 0; i < IFCOUNTERS; i++)
481 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK);
482 ifp->if_get_counter = if_get_counter_default;
483 ifnet_setbyindex(ifp->if_index, ifp);
488 * Do the actual work of freeing a struct ifnet, and layer 2 common
489 * structure. This call is made when the last reference to an
490 * interface is released.
493 if_free_internal(struct ifnet *ifp)
496 KASSERT((ifp->if_flags & IFF_DYING),
497 ("if_free_internal: interface not dying"));
499 if (if_com_free[ifp->if_alloctype] != NULL)
500 if_com_free[ifp->if_alloctype](ifp->if_l2com,
504 mac_ifnet_destroy(ifp);
506 if (ifp->if_description != NULL)
507 free(ifp->if_description, M_IFDESCR);
508 IF_AFDATA_DESTROY(ifp);
509 IF_ADDR_LOCK_DESTROY(ifp);
510 ifq_delete(&ifp->if_snd);
512 for (int i = 0; i < IFCOUNTERS; i++)
513 counter_u64_free(ifp->if_counters[i]);
519 * Deregister an interface and free the associated storage.
522 if_free(struct ifnet *ifp)
525 ifp->if_flags |= IFF_DYING; /* XXX: Locking */
527 CURVNET_SET_QUIET(ifp->if_vnet);
529 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index),
530 ("%s: freeing unallocated ifnet", ifp->if_xname));
532 ifindex_free_locked(ifp->if_index);
535 if (refcount_release(&ifp->if_refcount))
536 if_free_internal(ifp);
541 * Interfaces to keep an ifnet type-stable despite the possibility of the
542 * driver calling if_free(). If there are additional references, we defer
543 * freeing the underlying data structure.
546 if_ref(struct ifnet *ifp)
549 /* We don't assert the ifnet list lock here, but arguably should. */
550 refcount_acquire(&ifp->if_refcount);
554 if_rele(struct ifnet *ifp)
557 if (!refcount_release(&ifp->if_refcount))
559 if_free_internal(ifp);
563 ifq_init(struct ifaltq *ifq, struct ifnet *ifp)
566 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
568 if (ifq->ifq_maxlen == 0)
569 ifq->ifq_maxlen = ifqmaxlen;
572 ifq->altq_disc = NULL;
573 ifq->altq_flags &= ALTQF_CANTCHANGE;
574 ifq->altq_tbr = NULL;
579 ifq_delete(struct ifaltq *ifq)
581 mtx_destroy(&ifq->ifq_mtx);
585 * Perform generic interface initialization tasks and attach the interface
586 * to the list of "active" interfaces. If vmove flag is set on entry
587 * to if_attach_internal(), perform only a limited subset of initialization
588 * tasks, given that we are moving from one vnet to another an ifnet which
589 * has already been fully initialized.
591 * Note that if_detach_internal() removes group membership unconditionally
592 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL.
593 * Thus, when if_vmove() is applied to a cloned interface, group membership
594 * is lost while a cloned one always joins a group whose name is
595 * ifc->ifc_name. To recover this after if_detach_internal() and
596 * if_attach_internal(), the cloner should be specified to
597 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal()
598 * attempts to join a group whose name is ifc->ifc_name.
601 * - The decision to return void and thus require this function to
602 * succeed is questionable.
603 * - We should probably do more sanity checking. For instance we don't
604 * do anything to insure if_xname is unique or non-empty.
607 if_attach(struct ifnet *ifp)
610 if_attach_internal(ifp, 0, NULL);
614 * Compute the least common TSO limit.
617 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax)
620 * 1) If there is no limit currently, take the limit from
621 * the network adapter.
623 * 2) If the network adapter has a limit below the current
626 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 &&
627 ifp->if_hw_tsomax < pmax->tsomaxbytes)) {
628 pmax->tsomaxbytes = ifp->if_hw_tsomax;
630 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 &&
631 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) {
632 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount;
634 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 &&
635 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) {
636 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize;
641 * Update TSO limit of a network adapter.
643 * Returns zero if no change. Else non-zero.
646 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax)
649 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) {
650 ifp->if_hw_tsomax = pmax->tsomaxbytes;
653 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) {
654 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize;
657 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) {
658 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount;
665 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc)
667 unsigned socksize, ifasize;
668 int namelen, masklen;
669 struct sockaddr_dl *sdl;
672 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
673 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
677 ifp->if_vnet = curvnet;
678 if (ifp->if_home_vnet == NULL)
679 ifp->if_home_vnet = curvnet;
682 if_addgroup(ifp, IFG_ALL);
684 /* Restore group membership for cloned interfaces. */
685 if (vmove && ifc != NULL)
686 if_clone_addgroup(ifp, ifc);
688 getmicrotime(&ifp->if_lastchange);
689 ifp->if_epoch = time_uptime;
691 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) ||
692 (ifp->if_transmit != NULL && ifp->if_qflush != NULL),
693 ("transmit and qflush must both either be set or both be NULL"));
694 if (ifp->if_transmit == NULL) {
695 ifp->if_transmit = if_transmit;
696 ifp->if_qflush = if_qflush;
698 if (ifp->if_input == NULL)
699 ifp->if_input = if_input_default;
701 if (ifp->if_requestencap == NULL)
702 ifp->if_requestencap = if_requestencap_default;
706 mac_ifnet_create(ifp);
710 * Create a Link Level name for this device.
712 namelen = strlen(ifp->if_xname);
714 * Always save enough space for any possiable name so we
715 * can do a rename in place later.
717 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
718 socksize = masklen + ifp->if_addrlen;
719 if (socksize < sizeof(*sdl))
720 socksize = sizeof(*sdl);
721 socksize = roundup2(socksize, sizeof(long));
722 ifasize = sizeof(*ifa) + 2 * socksize;
723 ifa = ifa_alloc(ifasize, M_WAITOK);
724 sdl = (struct sockaddr_dl *)(ifa + 1);
725 sdl->sdl_len = socksize;
726 sdl->sdl_family = AF_LINK;
727 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
728 sdl->sdl_nlen = namelen;
729 sdl->sdl_index = ifp->if_index;
730 sdl->sdl_type = ifp->if_type;
733 ifa->ifa_rtrequest = link_rtrequest;
734 ifa->ifa_addr = (struct sockaddr *)sdl;
735 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
736 ifa->ifa_netmask = (struct sockaddr *)sdl;
737 sdl->sdl_len = masklen;
739 sdl->sdl_data[--namelen] = 0xff;
740 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
741 /* Reliably crash if used uninitialized. */
742 ifp->if_broadcastaddr = NULL;
744 #if defined(INET) || defined(INET6)
745 /* Use defaults for TSO, if nothing is set */
746 if (ifp->if_hw_tsomax == 0 &&
747 ifp->if_hw_tsomaxsegcount == 0 &&
748 ifp->if_hw_tsomaxsegsize == 0) {
750 * The TSO defaults needs to be such that an
751 * NFS mbuf list of 35 mbufs totalling just
752 * below 64K works and that a chain of mbufs
753 * can be defragged into at most 32 segments:
755 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) -
756 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
757 ifp->if_hw_tsomaxsegcount = 35;
758 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */
760 /* XXX some drivers set IFCAP_TSO after ethernet attach */
761 if (ifp->if_capabilities & IFCAP_TSO) {
762 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n",
764 ifp->if_hw_tsomaxsegcount,
765 ifp->if_hw_tsomaxsegsize);
773 * Update the interface index in the link layer address
776 for (ifa = ifp->if_addr; ifa != NULL;
777 ifa = TAILQ_NEXT(ifa, ifa_link)) {
778 if (ifa->ifa_addr->sa_family == AF_LINK) {
779 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
780 sdl->sdl_index = ifp->if_index;
787 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link);
789 curvnet->vnet_ifcnt++;
793 if (domain_init_status >= 2)
794 if_attachdomain1(ifp);
796 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
797 if (IS_DEFAULT_VNET(curvnet))
798 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
800 /* Announce the interface. */
801 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
805 if_attachdomain(void *dummy)
809 TAILQ_FOREACH(ifp, &V_ifnet, if_link)
810 if_attachdomain1(ifp);
812 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
813 if_attachdomain, NULL);
816 if_attachdomain1(struct ifnet *ifp)
821 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
822 * cannot lock ifp->if_afdata initialization, entirely.
824 if (IF_AFDATA_TRYLOCK(ifp) == 0)
826 if (ifp->if_afdata_initialized >= domain_init_status) {
827 IF_AFDATA_UNLOCK(ifp);
828 log(LOG_WARNING, "%s called more than once on %s\n",
829 __func__, ifp->if_xname);
832 ifp->if_afdata_initialized = domain_init_status;
833 IF_AFDATA_UNLOCK(ifp);
835 /* address family dependent data region */
836 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
837 for (dp = domains; dp; dp = dp->dom_next) {
838 if (dp->dom_ifattach)
839 ifp->if_afdata[dp->dom_family] =
840 (*dp->dom_ifattach)(ifp);
845 * Remove any unicast or broadcast network addresses from an interface.
848 if_purgeaddrs(struct ifnet *ifp)
850 struct ifaddr *ifa, *next;
852 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
853 if (ifa->ifa_addr->sa_family == AF_LINK)
856 /* XXX: Ugly!! ad hoc just for INET */
857 if (ifa->ifa_addr->sa_family == AF_INET) {
858 struct ifaliasreq ifr;
860 bzero(&ifr, sizeof(ifr));
861 ifr.ifra_addr = *ifa->ifa_addr;
862 if (ifa->ifa_dstaddr)
863 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
864 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
870 if (ifa->ifa_addr->sa_family == AF_INET6) {
872 /* ifp_addrhead is already updated */
876 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
882 * Remove any multicast network addresses from an interface when an ifnet
886 if_purgemaddrs(struct ifnet *ifp)
888 struct ifmultiaddr *ifma;
889 struct ifmultiaddr *next;
892 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
893 if_delmulti_locked(ifp, ifma, 1);
894 IF_ADDR_WUNLOCK(ifp);
898 * Detach an interface, removing it from the list of "active" interfaces.
899 * If vmove flag is set on entry to if_detach_internal(), perform only a
900 * limited subset of cleanup tasks, given that we are moving an ifnet from
901 * one vnet to another, where it must be fully operational.
903 * XXXRW: There are some significant questions about event ordering, and
904 * how to prevent things from starting to use the interface during detach.
907 if_detach(struct ifnet *ifp)
910 CURVNET_SET_QUIET(ifp->if_vnet);
911 if_detach_internal(ifp, 0, NULL);
916 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp)
925 TAILQ_FOREACH(iter, &V_ifnet, if_link)
927 TAILQ_REMOVE(&V_ifnet, ifp, if_link);
933 curvnet->vnet_ifcnt--;
938 * While we would want to panic here, we cannot
939 * guarantee that the interface is indeed still on
940 * the list given we don't hold locks all the way.
945 panic("%s: ifp=%p not on the ifnet tailq %p",
946 __func__, ifp, &V_ifnet);
948 return; /* XXX this should panic as well? */
952 /* Check if this is a cloned interface or not. */
953 if (vmove && ifcp != NULL)
954 *ifcp = if_clone_findifc(ifp);
957 * Remove/wait for pending events.
959 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
962 * Remove routes and flush queues.
966 if (ALTQ_IS_ENABLED(&ifp->if_snd))
967 altq_disable(&ifp->if_snd);
968 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
969 altq_detach(&ifp->if_snd);
980 * Remove all IPv6 kernel structs related to ifp. This should be done
981 * before removing routing entries below, since IPv6 interface direct
982 * routes are expected to be removed by the IPv6-specific kernel API.
983 * Otherwise, the kernel will detect some inconsistency and bark it.
989 /* Announce that the interface is gone. */
990 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
991 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
992 if (IS_DEFAULT_VNET(curvnet))
993 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
997 * Prevent further calls into the device driver via ifnet.
1002 * Remove link ifaddr pointer and maybe decrement if_index.
1003 * Clean up all addresses.
1005 ifp->if_addr = NULL;
1007 /* We can now free link ifaddr. */
1008 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
1009 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1010 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
1015 rt_flushifroutes(ifp);
1019 * We cannot hold the lock over dom_ifdetach calls as they might
1020 * sleep, for example trying to drain a callout, thus open up the
1021 * theoretical race with re-attaching.
1023 IF_AFDATA_LOCK(ifp);
1024 i = ifp->if_afdata_initialized;
1025 ifp->if_afdata_initialized = 0;
1026 IF_AFDATA_UNLOCK(ifp);
1027 for (dp = domains; i > 0 && dp; dp = dp->dom_next) {
1028 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
1029 (*dp->dom_ifdetach)(ifp,
1030 ifp->if_afdata[dp->dom_family]);
1038 * if_vmove() performs a limited version of if_detach() in current
1039 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg.
1040 * An attempt is made to shrink if_index in current vnet, find an
1041 * unused if_index in target vnet and calls if_grow() if necessary,
1042 * and finally find an unused if_xname for the target vnet.
1045 if_vmove(struct ifnet *ifp, struct vnet *new_vnet)
1047 struct if_clone *ifc;
1048 u_int bif_dlt, bif_hdrlen;
1052 * if_detach_internal() will call the eventhandler to notify
1053 * interface departure. That will detach if_bpf. We need to
1054 * safe the dlt and hdrlen so we can re-attach it later.
1056 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen);
1059 * Detach from current vnet, but preserve LLADDR info, do not
1060 * mark as dead etc. so that the ifnet can be reattached later.
1061 * If we cannot find it, we lost the race to someone else.
1063 rc = if_detach_internal(ifp, 1, &ifc);
1068 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink
1069 * the if_index for that vnet if possible.
1071 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized,
1072 * or we'd lock on one vnet and unlock on another.
1075 ifindex_free_locked(ifp->if_index);
1079 * Perform interface-specific reassignment tasks, if provided by
1082 if (ifp->if_reassign != NULL)
1083 ifp->if_reassign(ifp, new_vnet, NULL);
1086 * Switch to the context of the target vnet.
1088 CURVNET_SET_QUIET(new_vnet);
1091 ifp->if_index = ifindex_alloc();
1092 ifnet_setbyindex_locked(ifp->if_index, ifp);
1095 if_attach_internal(ifp, 1, ifc);
1097 if (ifp->if_bpf == NULL)
1098 bpfattach(ifp, bif_dlt, bif_hdrlen);
1104 * Move an ifnet to or from another child prison/vnet, specified by the jail id.
1107 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid)
1112 /* Try to find the prison within our visibility. */
1113 sx_slock(&allprison_lock);
1114 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1115 sx_sunlock(&allprison_lock);
1118 prison_hold_locked(pr);
1119 mtx_unlock(&pr->pr_mtx);
1121 /* Do not try to move the iface from and to the same prison. */
1122 if (pr->pr_vnet == ifp->if_vnet) {
1127 /* Make sure the named iface does not exists in the dst. prison/vnet. */
1128 /* XXX Lock interfaces to avoid races. */
1129 CURVNET_SET_QUIET(pr->pr_vnet);
1130 difp = ifunit(ifname);
1137 /* Move the interface into the child jail/vnet. */
1138 if_vmove(ifp, pr->pr_vnet);
1140 /* Report the new if_xname back to the userland. */
1141 sprintf(ifname, "%s", ifp->if_xname);
1148 if_vmove_reclaim(struct thread *td, char *ifname, int jid)
1151 struct vnet *vnet_dst;
1154 /* Try to find the prison within our visibility. */
1155 sx_slock(&allprison_lock);
1156 pr = prison_find_child(td->td_ucred->cr_prison, jid);
1157 sx_sunlock(&allprison_lock);
1160 prison_hold_locked(pr);
1161 mtx_unlock(&pr->pr_mtx);
1163 /* Make sure the named iface exists in the source prison/vnet. */
1164 CURVNET_SET(pr->pr_vnet);
1165 ifp = ifunit(ifname); /* XXX Lock to avoid races. */
1172 /* Do not try to move the iface from and to the same prison. */
1173 vnet_dst = TD_TO_VNET(td);
1174 if (vnet_dst == ifp->if_vnet) {
1180 /* Get interface back from child jail/vnet. */
1181 if_vmove(ifp, vnet_dst);
1184 /* Report the new if_xname back to the userland. */
1185 sprintf(ifname, "%s", ifp->if_xname);
1193 * Add a group to an interface
1196 if_addgroup(struct ifnet *ifp, const char *groupname)
1198 struct ifg_list *ifgl;
1199 struct ifg_group *ifg = NULL;
1200 struct ifg_member *ifgm;
1203 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' &&
1204 groupname[strlen(groupname) - 1] <= '9')
1208 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1209 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) {
1214 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP,
1215 M_NOWAIT)) == NULL) {
1220 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member),
1221 M_TEMP, M_NOWAIT)) == NULL) {
1227 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1228 if (!strcmp(ifg->ifg_group, groupname))
1232 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group),
1233 M_TEMP, M_NOWAIT)) == NULL) {
1239 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group));
1240 ifg->ifg_refcnt = 0;
1241 TAILQ_INIT(&ifg->ifg_members);
1242 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next);
1247 ifgl->ifgl_group = ifg;
1248 ifgm->ifgm_ifp = ifp;
1251 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next);
1252 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next);
1253 IF_ADDR_WUNLOCK(ifp);
1258 EVENTHANDLER_INVOKE(group_attach_event, ifg);
1259 EVENTHANDLER_INVOKE(group_change_event, groupname);
1265 * Remove a group from an interface
1268 if_delgroup(struct ifnet *ifp, const char *groupname)
1270 struct ifg_list *ifgl;
1271 struct ifg_member *ifgm;
1274 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1275 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname))
1283 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1284 IF_ADDR_WUNLOCK(ifp);
1286 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1287 if (ifgm->ifgm_ifp == ifp)
1291 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next);
1295 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1296 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1298 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group);
1299 free(ifgl->ifgl_group, M_TEMP);
1305 EVENTHANDLER_INVOKE(group_change_event, groupname);
1311 * Remove an interface from all groups
1314 if_delgroups(struct ifnet *ifp)
1316 struct ifg_list *ifgl;
1317 struct ifg_member *ifgm;
1318 char groupname[IFNAMSIZ];
1321 while (!TAILQ_EMPTY(&ifp->if_groups)) {
1322 ifgl = TAILQ_FIRST(&ifp->if_groups);
1324 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ);
1327 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next);
1328 IF_ADDR_WUNLOCK(ifp);
1330 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next)
1331 if (ifgm->ifgm_ifp == ifp)
1335 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm,
1340 if (--ifgl->ifgl_group->ifg_refcnt == 0) {
1341 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next);
1343 EVENTHANDLER_INVOKE(group_detach_event,
1345 free(ifgl->ifgl_group, M_TEMP);
1351 EVENTHANDLER_INVOKE(group_change_event, groupname);
1359 * Stores all groups from an interface in memory pointed
1363 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp)
1366 struct ifg_list *ifgl;
1367 struct ifg_req ifgrq, *ifgp;
1368 struct ifgroupreq *ifgr = data;
1370 if (ifgr->ifgr_len == 0) {
1372 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next)
1373 ifgr->ifgr_len += sizeof(struct ifg_req);
1374 IF_ADDR_RUNLOCK(ifp);
1378 len = ifgr->ifgr_len;
1379 ifgp = ifgr->ifgr_groups;
1382 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) {
1383 if (len < sizeof(ifgrq)) {
1384 IF_ADDR_RUNLOCK(ifp);
1387 bzero(&ifgrq, sizeof ifgrq);
1388 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group,
1389 sizeof(ifgrq.ifgrq_group));
1390 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1391 IF_ADDR_RUNLOCK(ifp);
1394 len -= sizeof(ifgrq);
1397 IF_ADDR_RUNLOCK(ifp);
1403 * Stores all members of a group in memory pointed to by data
1406 if_getgroupmembers(struct ifgroupreq *data)
1408 struct ifgroupreq *ifgr = data;
1409 struct ifg_group *ifg;
1410 struct ifg_member *ifgm;
1411 struct ifg_req ifgrq, *ifgp;
1415 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next)
1416 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name))
1423 if (ifgr->ifgr_len == 0) {
1424 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next)
1425 ifgr->ifgr_len += sizeof(ifgrq);
1430 len = ifgr->ifgr_len;
1431 ifgp = ifgr->ifgr_groups;
1432 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) {
1433 if (len < sizeof(ifgrq)) {
1437 bzero(&ifgrq, sizeof ifgrq);
1438 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname,
1439 sizeof(ifgrq.ifgrq_member));
1440 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) {
1444 len -= sizeof(ifgrq);
1453 * Return counter values from counter(9)s stored in ifnet.
1456 if_get_counter_default(struct ifnet *ifp, ift_counter cnt)
1459 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1461 return (counter_u64_fetch(ifp->if_counters[cnt]));
1465 * Increase an ifnet counter. Usually used for counters shared
1466 * between the stack and a driver, but function supports them all.
1469 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc)
1472 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt));
1474 counter_u64_add(ifp->if_counters[cnt], inc);
1478 * Copy data from ifnet to userland API structure if_data.
1481 if_data_copy(struct ifnet *ifp, struct if_data *ifd)
1484 ifd->ifi_type = ifp->if_type;
1485 ifd->ifi_physical = 0;
1486 ifd->ifi_addrlen = ifp->if_addrlen;
1487 ifd->ifi_hdrlen = ifp->if_hdrlen;
1488 ifd->ifi_link_state = ifp->if_link_state;
1490 ifd->ifi_datalen = sizeof(struct if_data);
1491 ifd->ifi_mtu = ifp->if_mtu;
1492 ifd->ifi_metric = ifp->if_metric;
1493 ifd->ifi_baudrate = ifp->if_baudrate;
1494 ifd->ifi_hwassist = ifp->if_hwassist;
1495 ifd->ifi_epoch = ifp->if_epoch;
1496 ifd->ifi_lastchange = ifp->if_lastchange;
1498 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS);
1499 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS);
1500 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS);
1501 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS);
1502 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS);
1503 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES);
1504 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES);
1505 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS);
1506 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS);
1507 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS);
1508 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS);
1509 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO);
1513 * Wrapper functions for struct ifnet address list locking macros. These are
1514 * used by kernel modules to avoid encoding programming interface or binary
1515 * interface assumptions that may be violated when kernel-internal locking
1516 * approaches change.
1519 if_addr_rlock(struct ifnet *ifp)
1526 if_addr_runlock(struct ifnet *ifp)
1529 IF_ADDR_RUNLOCK(ifp);
1533 if_maddr_rlock(if_t ifp)
1536 IF_ADDR_RLOCK((struct ifnet *)ifp);
1540 if_maddr_runlock(if_t ifp)
1543 IF_ADDR_RUNLOCK((struct ifnet *)ifp);
1547 * Initialization, destruction and refcounting functions for ifaddrs.
1550 ifa_alloc(size_t size, int flags)
1554 KASSERT(size >= sizeof(struct ifaddr),
1555 ("%s: invalid size %zu", __func__, size));
1557 ifa = malloc(size, M_IFADDR, M_ZERO | flags);
1561 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL)
1563 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL)
1565 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL)
1567 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL)
1570 refcount_init(&ifa->ifa_refcnt, 1);
1575 /* free(NULL) is okay */
1576 counter_u64_free(ifa->ifa_opackets);
1577 counter_u64_free(ifa->ifa_ipackets);
1578 counter_u64_free(ifa->ifa_obytes);
1579 counter_u64_free(ifa->ifa_ibytes);
1580 free(ifa, M_IFADDR);
1586 ifa_ref(struct ifaddr *ifa)
1589 refcount_acquire(&ifa->ifa_refcnt);
1593 ifa_free(struct ifaddr *ifa)
1596 if (refcount_release(&ifa->ifa_refcnt)) {
1597 counter_u64_free(ifa->ifa_opackets);
1598 counter_u64_free(ifa->ifa_ipackets);
1599 counter_u64_free(ifa->ifa_obytes);
1600 counter_u64_free(ifa->ifa_ibytes);
1601 free(ifa, M_IFADDR);
1606 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa,
1607 struct sockaddr *ia)
1610 struct rt_addrinfo info;
1611 struct sockaddr_dl null_sdl;
1616 bzero(&info, sizeof(info));
1617 if (cmd != RTM_DELETE)
1618 info.rti_ifp = V_loif;
1619 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC;
1620 info.rti_info[RTAX_DST] = ia;
1621 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl;
1622 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type);
1624 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib);
1627 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n",
1628 __func__, otype, if_name(ifp), error);
1634 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1637 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia));
1641 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1644 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia));
1648 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia)
1651 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia));
1655 * XXX: Because sockaddr_dl has deeper structure than the sockaddr
1656 * structs used to represent other address families, it is necessary
1657 * to perform a different comparison.
1660 #define sa_dl_equal(a1, a2) \
1661 ((((const struct sockaddr_dl *)(a1))->sdl_len == \
1662 ((const struct sockaddr_dl *)(a2))->sdl_len) && \
1663 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \
1664 CLLADDR((const struct sockaddr_dl *)(a2)), \
1665 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0))
1668 * Locate an interface based on a complete address.
1671 static struct ifaddr *
1672 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref)
1677 IFNET_RLOCK_NOSLEEP();
1678 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1680 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1681 if (ifa->ifa_addr->sa_family != addr->sa_family)
1683 if (sa_equal(addr, ifa->ifa_addr)) {
1686 IF_ADDR_RUNLOCK(ifp);
1689 /* IP6 doesn't have broadcast */
1690 if ((ifp->if_flags & IFF_BROADCAST) &&
1691 ifa->ifa_broadaddr &&
1692 ifa->ifa_broadaddr->sa_len != 0 &&
1693 sa_equal(ifa->ifa_broadaddr, addr)) {
1696 IF_ADDR_RUNLOCK(ifp);
1700 IF_ADDR_RUNLOCK(ifp);
1704 IFNET_RUNLOCK_NOSLEEP();
1709 ifa_ifwithaddr(const struct sockaddr *addr)
1712 return (ifa_ifwithaddr_internal(addr, 1));
1716 ifa_ifwithaddr_check(const struct sockaddr *addr)
1719 return (ifa_ifwithaddr_internal(addr, 0) != NULL);
1723 * Locate an interface based on the broadcast address.
1727 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum)
1732 IFNET_RLOCK_NOSLEEP();
1733 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1734 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1737 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1738 if (ifa->ifa_addr->sa_family != addr->sa_family)
1740 if ((ifp->if_flags & IFF_BROADCAST) &&
1741 ifa->ifa_broadaddr &&
1742 ifa->ifa_broadaddr->sa_len != 0 &&
1743 sa_equal(ifa->ifa_broadaddr, addr)) {
1745 IF_ADDR_RUNLOCK(ifp);
1749 IF_ADDR_RUNLOCK(ifp);
1753 IFNET_RUNLOCK_NOSLEEP();
1758 * Locate the point to point interface with a given destination address.
1762 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum)
1767 IFNET_RLOCK_NOSLEEP();
1768 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1769 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
1771 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1774 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1775 if (ifa->ifa_addr->sa_family != addr->sa_family)
1777 if (ifa->ifa_dstaddr != NULL &&
1778 sa_equal(addr, ifa->ifa_dstaddr)) {
1780 IF_ADDR_RUNLOCK(ifp);
1784 IF_ADDR_RUNLOCK(ifp);
1788 IFNET_RUNLOCK_NOSLEEP();
1793 * Find an interface on a specific network. If many, choice
1794 * is most specific found.
1797 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum)
1801 struct ifaddr *ifa_maybe = NULL;
1802 u_int af = addr->sa_family;
1803 const char *addr_data = addr->sa_data, *cplim;
1806 * AF_LINK addresses can be looked up directly by their index number,
1807 * so do that if we can.
1809 if (af == AF_LINK) {
1810 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr;
1811 if (sdl->sdl_index && sdl->sdl_index <= V_if_index)
1812 return (ifaddr_byindex(sdl->sdl_index));
1816 * Scan though each interface, looking for ones that have addresses
1817 * in this address family and the requested fib. Maintain a reference
1818 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that
1819 * kept it stable when we move onto the next interface.
1821 IFNET_RLOCK_NOSLEEP();
1822 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
1823 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum))
1826 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1827 const char *cp, *cp2, *cp3;
1829 if (ifa->ifa_addr->sa_family != af)
1831 if (af == AF_INET &&
1832 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) {
1834 * This is a bit broken as it doesn't
1835 * take into account that the remote end may
1836 * be a single node in the network we are
1838 * The trouble is that we don't know the
1839 * netmask for the remote end.
1841 if (ifa->ifa_dstaddr != NULL &&
1842 sa_equal(addr, ifa->ifa_dstaddr)) {
1844 IF_ADDR_RUNLOCK(ifp);
1849 * Scan all the bits in the ifa's address.
1850 * If a bit dissagrees with what we are
1851 * looking for, mask it with the netmask
1852 * to see if it really matters.
1853 * (A byte at a time)
1855 if (ifa->ifa_netmask == 0)
1858 cp2 = ifa->ifa_addr->sa_data;
1859 cp3 = ifa->ifa_netmask->sa_data;
1860 cplim = ifa->ifa_netmask->sa_len
1861 + (char *)ifa->ifa_netmask;
1863 if ((*cp++ ^ *cp2++) & *cp3++)
1864 goto next; /* next address! */
1866 * If the netmask of what we just found
1867 * is more specific than what we had before
1868 * (if we had one), or if the virtual status
1869 * of new prefix is better than of the old one,
1870 * then remember the new one before continuing
1871 * to search for an even better one.
1873 if (ifa_maybe == NULL ||
1874 ifa_preferred(ifa_maybe, ifa) ||
1875 rn_refines((caddr_t)ifa->ifa_netmask,
1876 (caddr_t)ifa_maybe->ifa_netmask)) {
1877 if (ifa_maybe != NULL)
1878 ifa_free(ifa_maybe);
1884 IF_ADDR_RUNLOCK(ifp);
1889 IFNET_RUNLOCK_NOSLEEP();
1890 if (ifa_maybe != NULL)
1891 ifa_free(ifa_maybe);
1896 * Find an interface address specific to an interface best matching
1900 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp)
1903 const char *cp, *cp2, *cp3;
1905 struct ifaddr *ifa_maybe = NULL;
1906 u_int af = addr->sa_family;
1911 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1912 if (ifa->ifa_addr->sa_family != af)
1914 if (ifa_maybe == NULL)
1916 if (ifa->ifa_netmask == 0) {
1917 if (sa_equal(addr, ifa->ifa_addr) ||
1918 (ifa->ifa_dstaddr &&
1919 sa_equal(addr, ifa->ifa_dstaddr)))
1923 if (ifp->if_flags & IFF_POINTOPOINT) {
1924 if (sa_equal(addr, ifa->ifa_dstaddr))
1928 cp2 = ifa->ifa_addr->sa_data;
1929 cp3 = ifa->ifa_netmask->sa_data;
1930 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1931 for (; cp3 < cplim; cp3++)
1932 if ((*cp++ ^ *cp2++) & *cp3)
1942 IF_ADDR_RUNLOCK(ifp);
1947 * See whether new ifa is better than current one:
1948 * 1) A non-virtual one is preferred over virtual.
1949 * 2) A virtual in master state preferred over any other state.
1951 * Used in several address selecting functions.
1954 ifa_preferred(struct ifaddr *cur, struct ifaddr *next)
1957 return (cur->ifa_carp && (!next->ifa_carp ||
1958 ((*carp_master_p)(next) && !(*carp_master_p)(cur))));
1961 #include <net/if_llatbl.h>
1964 * Default action when installing a route with a Link Level gateway.
1965 * Lookup an appropriate real ifa to point to.
1966 * This should be moved to /sys/net/link.c eventually.
1969 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
1971 struct ifaddr *ifa, *oifa;
1972 struct sockaddr *dst;
1975 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) ||
1976 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL))
1978 ifa = ifaof_ifpforaddr(dst, ifp);
1983 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1984 ifa->ifa_rtrequest(cmd, rt, info);
1988 struct sockaddr_dl *
1989 link_alloc_sdl(size_t size, int flags)
1992 return (malloc(size, M_TEMP, flags));
1996 link_free_sdl(struct sockaddr *sa)
2002 * Fills in given sdl with interface basic info.
2003 * Returns pointer to filled sdl.
2005 struct sockaddr_dl *
2006 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype)
2008 struct sockaddr_dl *sdl;
2010 sdl = (struct sockaddr_dl *)paddr;
2011 memset(sdl, 0, sizeof(struct sockaddr_dl));
2012 sdl->sdl_len = sizeof(struct sockaddr_dl);
2013 sdl->sdl_family = AF_LINK;
2014 sdl->sdl_index = ifp->if_index;
2015 sdl->sdl_type = iftype;
2021 * Mark an interface down and notify protocols of
2025 if_unroute(struct ifnet *ifp, int flag, int fam)
2029 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP"));
2031 ifp->if_flags &= ~flag;
2032 getmicrotime(&ifp->if_lastchange);
2033 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2034 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2035 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
2036 ifp->if_qflush(ifp);
2039 (*carp_linkstate_p)(ifp);
2044 * Mark an interface up and notify protocols of
2048 if_route(struct ifnet *ifp, int flag, int fam)
2052 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP"));
2054 ifp->if_flags |= flag;
2055 getmicrotime(&ifp->if_lastchange);
2056 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
2057 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
2058 pfctlinput(PRC_IFUP, ifa->ifa_addr);
2060 (*carp_linkstate_p)(ifp);
2067 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */
2068 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */
2069 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *);
2070 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t);
2071 int (*vlan_tag_p)(struct ifnet *, uint16_t *);
2072 int (*vlan_setcookie_p)(struct ifnet *, void *);
2073 void *(*vlan_cookie_p)(struct ifnet *);
2076 * Handle a change in the interface link state. To avoid LORs
2077 * between driver lock and upper layer locks, as well as possible
2078 * recursions, we post event to taskqueue, and all job
2079 * is done in static do_link_state_change().
2082 if_link_state_change(struct ifnet *ifp, int link_state)
2084 /* Return if state hasn't changed. */
2085 if (ifp->if_link_state == link_state)
2088 ifp->if_link_state = link_state;
2090 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
2094 do_link_state_change(void *arg, int pending)
2096 struct ifnet *ifp = (struct ifnet *)arg;
2097 int link_state = ifp->if_link_state;
2098 CURVNET_SET(ifp->if_vnet);
2100 /* Notify that the link state has changed. */
2102 if (ifp->if_vlantrunk != NULL)
2103 (*vlan_link_state_p)(ifp);
2105 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
2106 ifp->if_l2com != NULL)
2107 (*ng_ether_link_state_p)(ifp, link_state);
2109 (*carp_linkstate_p)(ifp);
2111 (*bridge_linkstate_p)(ifp);
2113 (*lagg_linkstate_p)(ifp, link_state);
2115 if (IS_DEFAULT_VNET(curvnet))
2116 devctl_notify("IFNET", ifp->if_xname,
2117 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN",
2120 if_printf(ifp, "%d link states coalesced\n", pending);
2121 if (log_link_state_change)
2122 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
2123 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
2124 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, ifp->if_link_state);
2129 * Mark an interface down and notify protocols of
2133 if_down(struct ifnet *ifp)
2136 if_unroute(ifp, IFF_UP, AF_UNSPEC);
2140 * Mark an interface up and notify protocols of
2144 if_up(struct ifnet *ifp)
2147 if_route(ifp, IFF_UP, AF_UNSPEC);
2151 * Flush an interface queue.
2154 if_qflush(struct ifnet *ifp)
2162 if (ALTQ_IS_ENABLED(ifq))
2166 while ((m = n) != NULL) {
2177 * Map interface name to interface structure pointer, with or without
2178 * returning a reference.
2181 ifunit_ref(const char *name)
2185 IFNET_RLOCK_NOSLEEP();
2186 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2187 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 &&
2188 !(ifp->if_flags & IFF_DYING))
2193 IFNET_RUNLOCK_NOSLEEP();
2198 ifunit(const char *name)
2202 IFNET_RLOCK_NOSLEEP();
2203 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2204 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
2207 IFNET_RUNLOCK_NOSLEEP();
2212 * Hardware specific interface ioctls.
2215 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
2219 int new_flags, temp_flags;
2220 size_t namelen, onamelen;
2222 char *descrbuf, *odescrbuf;
2223 char new_name[IFNAMSIZ];
2225 struct sockaddr_dl *sdl;
2227 ifr = (struct ifreq *)data;
2230 ifr->ifr_index = ifp->if_index;
2234 temp_flags = ifp->if_flags | ifp->if_drv_flags;
2235 ifr->ifr_flags = temp_flags & 0xffff;
2236 ifr->ifr_flagshigh = temp_flags >> 16;
2240 ifr->ifr_reqcap = ifp->if_capabilities;
2241 ifr->ifr_curcap = ifp->if_capenable;
2246 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp);
2251 ifr->ifr_metric = ifp->if_metric;
2255 ifr->ifr_mtu = ifp->if_mtu;
2259 /* XXXGL: did this ever worked? */
2265 sx_slock(&ifdescr_sx);
2266 if (ifp->if_description == NULL)
2269 /* space for terminating nul */
2270 descrlen = strlen(ifp->if_description) + 1;
2271 if (ifr->ifr_buffer.length < descrlen)
2272 ifr->ifr_buffer.buffer = NULL;
2274 error = copyout(ifp->if_description,
2275 ifr->ifr_buffer.buffer, descrlen);
2276 ifr->ifr_buffer.length = descrlen;
2278 sx_sunlock(&ifdescr_sx);
2282 error = priv_check(td, PRIV_NET_SETIFDESCR);
2287 * Copy only (length-1) bytes to make sure that
2288 * if_description is always nul terminated. The
2289 * length parameter is supposed to count the
2290 * terminating nul in.
2292 if (ifr->ifr_buffer.length > ifdescr_maxlen)
2293 return (ENAMETOOLONG);
2294 else if (ifr->ifr_buffer.length == 0)
2297 descrbuf = malloc(ifr->ifr_buffer.length, M_IFDESCR,
2299 error = copyin(ifr->ifr_buffer.buffer, descrbuf,
2300 ifr->ifr_buffer.length - 1);
2302 free(descrbuf, M_IFDESCR);
2307 sx_xlock(&ifdescr_sx);
2308 odescrbuf = ifp->if_description;
2309 ifp->if_description = descrbuf;
2310 sx_xunlock(&ifdescr_sx);
2312 getmicrotime(&ifp->if_lastchange);
2313 free(odescrbuf, M_IFDESCR);
2317 ifr->ifr_fib = ifp->if_fib;
2321 error = priv_check(td, PRIV_NET_SETIFFIB);
2324 if (ifr->ifr_fib >= rt_numfibs)
2327 ifp->if_fib = ifr->ifr_fib;
2331 error = priv_check(td, PRIV_NET_SETIFFLAGS);
2335 * Currently, no driver owned flags pass the IFF_CANTCHANGE
2336 * check, so we don't need special handling here yet.
2338 new_flags = (ifr->ifr_flags & 0xffff) |
2339 (ifr->ifr_flagshigh << 16);
2340 if (ifp->if_flags & IFF_UP &&
2341 (new_flags & IFF_UP) == 0) {
2343 } else if (new_flags & IFF_UP &&
2344 (ifp->if_flags & IFF_UP) == 0) {
2347 /* See if permanently promiscuous mode bit is about to flip */
2348 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) {
2349 if (new_flags & IFF_PPROMISC)
2350 ifp->if_flags |= IFF_PROMISC;
2351 else if (ifp->if_pcount == 0)
2352 ifp->if_flags &= ~IFF_PROMISC;
2353 if (log_promisc_mode_change)
2354 log(LOG_INFO, "%s: permanently promiscuous mode %s\n",
2356 ((new_flags & IFF_PPROMISC) ?
2357 "enabled" : "disabled"));
2359 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
2360 (new_flags &~ IFF_CANTCHANGE);
2361 if (ifp->if_ioctl) {
2362 (void) (*ifp->if_ioctl)(ifp, cmd, data);
2364 getmicrotime(&ifp->if_lastchange);
2368 error = priv_check(td, PRIV_NET_SETIFCAP);
2371 if (ifp->if_ioctl == NULL)
2372 return (EOPNOTSUPP);
2373 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
2375 error = (*ifp->if_ioctl)(ifp, cmd, data);
2377 getmicrotime(&ifp->if_lastchange);
2382 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp);
2387 error = priv_check(td, PRIV_NET_SETIFNAME);
2390 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
2393 if (new_name[0] == '\0')
2395 if (new_name[IFNAMSIZ-1] != '\0') {
2396 new_name[IFNAMSIZ-1] = '\0';
2397 if (strlen(new_name) == IFNAMSIZ-1)
2400 if (ifunit(new_name) != NULL)
2404 * XXX: Locking. Nothing else seems to lock if_flags,
2405 * and there are numerous other races with the
2406 * ifunit() checks not being atomic with namespace
2407 * changes (renames, vmoves, if_attach, etc).
2409 ifp->if_flags |= IFF_RENAMING;
2411 /* Announce the departure of the interface. */
2412 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
2413 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
2415 log(LOG_INFO, "%s: changing name to '%s'\n",
2416 ifp->if_xname, new_name);
2419 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
2421 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2422 namelen = strlen(new_name);
2423 onamelen = sdl->sdl_nlen;
2425 * Move the address if needed. This is safe because we
2426 * allocate space for a name of length IFNAMSIZ when we
2427 * create this in if_attach().
2429 if (namelen != onamelen) {
2430 bcopy(sdl->sdl_data + onamelen,
2431 sdl->sdl_data + namelen, sdl->sdl_alen);
2433 bcopy(new_name, sdl->sdl_data, namelen);
2434 sdl->sdl_nlen = namelen;
2435 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
2436 bzero(sdl->sdl_data, onamelen);
2437 while (namelen != 0)
2438 sdl->sdl_data[--namelen] = 0xff;
2439 IF_ADDR_WUNLOCK(ifp);
2441 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
2442 /* Announce the return of the interface. */
2443 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
2445 ifp->if_flags &= ~IFF_RENAMING;
2450 error = priv_check(td, PRIV_NET_SETIFVNET);
2453 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid);
2458 error = priv_check(td, PRIV_NET_SETIFMETRIC);
2461 ifp->if_metric = ifr->ifr_metric;
2462 getmicrotime(&ifp->if_lastchange);
2466 error = priv_check(td, PRIV_NET_SETIFPHYS);
2469 if (ifp->if_ioctl == NULL)
2470 return (EOPNOTSUPP);
2471 error = (*ifp->if_ioctl)(ifp, cmd, data);
2473 getmicrotime(&ifp->if_lastchange);
2478 u_long oldmtu = ifp->if_mtu;
2480 error = priv_check(td, PRIV_NET_SETIFMTU);
2483 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
2485 if (ifp->if_ioctl == NULL)
2486 return (EOPNOTSUPP);
2487 error = (*ifp->if_ioctl)(ifp, cmd, data);
2489 getmicrotime(&ifp->if_lastchange);
2493 * If the link MTU changed, do network layer specific procedure.
2495 if (ifp->if_mtu != oldmtu) {
2506 if (cmd == SIOCADDMULTI)
2507 error = priv_check(td, PRIV_NET_ADDMULTI);
2509 error = priv_check(td, PRIV_NET_DELMULTI);
2513 /* Don't allow group membership on non-multicast interfaces. */
2514 if ((ifp->if_flags & IFF_MULTICAST) == 0)
2515 return (EOPNOTSUPP);
2517 /* Don't let users screw up protocols' entries. */
2518 if (ifr->ifr_addr.sa_family != AF_LINK)
2521 if (cmd == SIOCADDMULTI) {
2522 struct ifmultiaddr *ifma;
2525 * Userland is only permitted to join groups once
2526 * via the if_addmulti() KPI, because it cannot hold
2527 * struct ifmultiaddr * between calls. It may also
2528 * lose a race while we check if the membership
2532 ifma = if_findmulti(ifp, &ifr->ifr_addr);
2533 IF_ADDR_RUNLOCK(ifp);
2537 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
2539 error = if_delmulti(ifp, &ifr->ifr_addr);
2542 getmicrotime(&ifp->if_lastchange);
2545 case SIOCSIFPHYADDR:
2546 case SIOCDIFPHYADDR:
2548 case SIOCSIFPHYADDR_IN6:
2551 case SIOCSIFGENERIC:
2552 error = priv_check(td, PRIV_NET_HWIOCTL);
2555 if (ifp->if_ioctl == NULL)
2556 return (EOPNOTSUPP);
2557 error = (*ifp->if_ioctl)(ifp, cmd, data);
2559 getmicrotime(&ifp->if_lastchange);
2563 case SIOCGIFPSRCADDR:
2564 case SIOCGIFPDSTADDR:
2567 case SIOCGIFGENERIC:
2568 if (ifp->if_ioctl == NULL)
2569 return (EOPNOTSUPP);
2570 error = (*ifp->if_ioctl)(ifp, cmd, data);
2574 error = priv_check(td, PRIV_NET_SETLLADDR);
2577 error = if_setlladdr(ifp,
2578 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
2583 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2585 error = priv_check(td, PRIV_NET_ADDIFGROUP);
2588 if ((error = if_addgroup(ifp, ifgr->ifgr_group)))
2594 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp)))
2600 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr;
2602 error = priv_check(td, PRIV_NET_DELIFGROUP);
2605 if ((error = if_delgroup(ifp, ifgr->ifgr_group)))
2617 #ifdef COMPAT_FREEBSD32
2625 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32)
2632 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
2639 CURVNET_SET(so->so_vnet);
2642 error = ifconf(cmd, data);
2646 #ifdef COMPAT_FREEBSD32
2649 struct ifconf32 *ifc32;
2652 ifc32 = (struct ifconf32 *)data;
2653 ifc.ifc_len = ifc32->ifc_len;
2654 ifc.ifc_buf = PTRIN(ifc32->ifc_buf);
2656 error = ifconf(SIOCGIFCONF, (void *)&ifc);
2659 ifc32->ifc_len = ifc.ifc_len;
2664 ifr = (struct ifreq *)data;
2669 error = priv_check(td, PRIV_NET_SETIFVNET);
2671 error = if_vmove_reclaim(td, ifr->ifr_name,
2678 error = priv_check(td, PRIV_NET_IFCREATE);
2680 error = if_clone_create(ifr->ifr_name,
2681 sizeof(ifr->ifr_name),
2682 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL);
2686 error = priv_check(td, PRIV_NET_IFDESTROY);
2688 error = if_clone_destroy(ifr->ifr_name);
2692 case SIOCIFGCLONERS:
2693 error = if_clone_list((struct if_clonereq *)data);
2697 error = if_getgroupmembers((struct ifgroupreq *)data);
2700 #if defined(INET) || defined(INET6)
2703 if (carp_ioctl_p == NULL)
2704 error = EPROTONOSUPPORT;
2706 error = (*carp_ioctl_p)(ifr, cmd, td);
2712 ifp = ifunit_ref(ifr->ifr_name);
2718 error = ifhwioctl(cmd, ifp, data, td);
2719 if (error != ENOIOCTL) {
2725 oif_flags = ifp->if_flags;
2726 if (so->so_proto == NULL) {
2729 return (EOPNOTSUPP);
2733 * Pass the request on to the socket control method, and if the
2734 * latter returns EOPNOTSUPP, directly to the interface.
2736 * Make an exception for the legacy SIOCSIF* requests. Drivers
2737 * trust SIOCSIFADDR et al to come from an already privileged
2738 * layer, and do not perform any credentials checks or input
2741 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data,
2743 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL &&
2744 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR &&
2745 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK)
2746 error = (*ifp->if_ioctl)(ifp, cmd, data);
2748 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
2750 if (ifp->if_flags & IFF_UP)
2760 * The code common to handling reference counted flags,
2761 * e.g., in ifpromisc() and if_allmulti().
2762 * The "pflag" argument can specify a permanent mode flag to check,
2763 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
2765 * Only to be used on stack-owned flags, not driver-owned flags.
2768 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
2772 int oldflags, oldcount;
2774 /* Sanity checks to catch programming errors */
2775 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0,
2776 ("%s: setting driver-owned flag %d", __func__, flag));
2779 KASSERT(*refcount >= 0,
2780 ("%s: increment negative refcount %d for flag %d",
2781 __func__, *refcount, flag));
2783 KASSERT(*refcount > 0,
2784 ("%s: decrement non-positive refcount %d for flag %d",
2785 __func__, *refcount, flag));
2787 /* In case this mode is permanent, just touch refcount */
2788 if (ifp->if_flags & pflag) {
2789 *refcount += onswitch ? 1 : -1;
2793 /* Save ifnet parameters for if_ioctl() may fail */
2794 oldcount = *refcount;
2795 oldflags = ifp->if_flags;
2798 * See if we aren't the only and touching refcount is enough.
2799 * Actually toggle interface flag if we are the first or last.
2804 ifp->if_flags |= flag;
2808 ifp->if_flags &= ~flag;
2811 /* Call down the driver since we've changed interface flags */
2812 if (ifp->if_ioctl == NULL) {
2816 ifr.ifr_flags = ifp->if_flags & 0xffff;
2817 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2818 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2821 /* Notify userland that interface flags have changed */
2826 /* Recover after driver error */
2827 *refcount = oldcount;
2828 ifp->if_flags = oldflags;
2833 * Set/clear promiscuous mode on interface ifp based on the truth value
2834 * of pswitch. The calls are reference counted so that only the first
2835 * "on" request actually has an effect, as does the final "off" request.
2836 * Results are undefined if the "off" and "on" requests are not matched.
2839 ifpromisc(struct ifnet *ifp, int pswitch)
2842 int oldflags = ifp->if_flags;
2844 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
2845 &ifp->if_pcount, pswitch);
2846 /* If promiscuous mode status has changed, log a message */
2847 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) &&
2848 log_promisc_mode_change)
2849 log(LOG_INFO, "%s: promiscuous mode %s\n",
2851 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
2856 * Return interface configuration
2857 * of system. List may be used
2858 * in later ioctl's (above) to get
2859 * other information.
2863 ifconf(u_long cmd, caddr_t data)
2865 struct ifconf *ifc = (struct ifconf *)data;
2870 int error, full = 0, valid_len, max_len;
2872 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
2873 max_len = MAXPHYS - 1;
2875 /* Prevent hostile input from being able to crash the system */
2876 if (ifc->ifc_len <= 0)
2880 if (ifc->ifc_len <= max_len) {
2881 max_len = ifc->ifc_len;
2884 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
2889 TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
2893 * Zero the ifr_name buffer to make sure we don't
2894 * disclose the contents of the stack.
2896 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
2898 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
2899 >= sizeof(ifr.ifr_name)) {
2902 return (ENAMETOOLONG);
2907 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2908 struct sockaddr *sa = ifa->ifa_addr;
2910 if (prison_if(curthread->td_ucred, sa) != 0)
2913 if (sa->sa_len <= sizeof(*sa)) {
2915 sbuf_bcat(sb, &ifr, sizeof(ifr));
2916 max_len += sizeof(ifr);
2919 offsetof(struct ifreq, ifr_addr));
2920 max_len += offsetof(struct ifreq, ifr_addr);
2921 sbuf_bcat(sb, sa, sa->sa_len);
2922 max_len += sa->sa_len;
2925 if (sbuf_error(sb) == 0)
2926 valid_len = sbuf_len(sb);
2928 IF_ADDR_RUNLOCK(ifp);
2930 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
2931 sbuf_bcat(sb, &ifr, sizeof(ifr));
2932 max_len += sizeof(ifr);
2934 if (sbuf_error(sb) == 0)
2935 valid_len = sbuf_len(sb);
2941 * If we didn't allocate enough space (uncommon), try again. If
2942 * we have already allocated as much space as we are allowed,
2943 * return what we've got.
2945 if (valid_len != max_len && !full) {
2950 ifc->ifc_len = valid_len;
2952 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
2958 * Just like ifpromisc(), but for all-multicast-reception mode.
2961 if_allmulti(struct ifnet *ifp, int onswitch)
2964 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
2967 struct ifmultiaddr *
2968 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa)
2970 struct ifmultiaddr *ifma;
2972 IF_ADDR_LOCK_ASSERT(ifp);
2974 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
2975 if (sa->sa_family == AF_LINK) {
2976 if (sa_dl_equal(ifma->ifma_addr, sa))
2979 if (sa_equal(ifma->ifma_addr, sa))
2988 * Allocate a new ifmultiaddr and initialize based on passed arguments. We
2989 * make copies of passed sockaddrs. The ifmultiaddr will not be added to
2990 * the ifnet multicast address list here, so the caller must do that and
2991 * other setup work (such as notifying the device driver). The reference
2992 * count is initialized to 1.
2994 static struct ifmultiaddr *
2995 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa,
2998 struct ifmultiaddr *ifma;
2999 struct sockaddr *dupsa;
3001 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags |
3006 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags);
3007 if (dupsa == NULL) {
3008 free(ifma, M_IFMADDR);
3011 bcopy(sa, dupsa, sa->sa_len);
3012 ifma->ifma_addr = dupsa;
3014 ifma->ifma_ifp = ifp;
3015 ifma->ifma_refcount = 1;
3016 ifma->ifma_protospec = NULL;
3019 ifma->ifma_lladdr = NULL;
3023 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags);
3024 if (dupsa == NULL) {
3025 free(ifma->ifma_addr, M_IFMADDR);
3026 free(ifma, M_IFMADDR);
3029 bcopy(llsa, dupsa, llsa->sa_len);
3030 ifma->ifma_lladdr = dupsa;
3036 * if_freemulti: free ifmultiaddr structure and possibly attached related
3037 * addresses. The caller is responsible for implementing reference
3038 * counting, notifying the driver, handling routing messages, and releasing
3039 * any dependent link layer state.
3042 if_freemulti(struct ifmultiaddr *ifma)
3045 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d",
3046 ifma->ifma_refcount));
3048 if (ifma->ifma_lladdr != NULL)
3049 free(ifma->ifma_lladdr, M_IFMADDR);
3050 free(ifma->ifma_addr, M_IFMADDR);
3051 free(ifma, M_IFMADDR);
3055 * Register an additional multicast address with a network interface.
3057 * - If the address is already present, bump the reference count on the
3058 * address and return.
3059 * - If the address is not link-layer, look up a link layer address.
3060 * - Allocate address structures for one or both addresses, and attach to the
3061 * multicast address list on the interface. If automatically adding a link
3062 * layer address, the protocol address will own a reference to the link
3063 * layer address, to be freed when it is freed.
3064 * - Notify the network device driver of an addition to the multicast address
3067 * 'sa' points to caller-owned memory with the desired multicast address.
3069 * 'retifma' will be used to return a pointer to the resulting multicast
3070 * address reference, if desired.
3073 if_addmulti(struct ifnet *ifp, struct sockaddr *sa,
3074 struct ifmultiaddr **retifma)
3076 struct ifmultiaddr *ifma, *ll_ifma;
3077 struct sockaddr *llsa;
3078 struct sockaddr_dl sdl;
3082 * If the address is already present, return a new reference to it;
3083 * otherwise, allocate storage and set up a new address.
3086 ifma = if_findmulti(ifp, sa);
3088 ifma->ifma_refcount++;
3089 if (retifma != NULL)
3091 IF_ADDR_WUNLOCK(ifp);
3096 * The address isn't already present; resolve the protocol address
3097 * into a link layer address, and then look that up, bump its
3098 * refcount or allocate an ifma for that also.
3099 * Most link layer resolving functions returns address data which
3100 * fits inside default sockaddr_dl structure. However callback
3101 * can allocate another sockaddr structure, in that case we need to
3106 if (ifp->if_resolvemulti != NULL) {
3107 /* Provide called function with buffer size information */
3108 sdl.sdl_len = sizeof(sdl);
3109 llsa = (struct sockaddr *)&sdl;
3110 error = ifp->if_resolvemulti(ifp, &llsa, sa);
3116 * Allocate the new address. Don't hook it up yet, as we may also
3117 * need to allocate a link layer multicast address.
3119 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT);
3126 * If a link layer address is found, we'll need to see if it's
3127 * already present in the address list, or allocate is as well.
3128 * When this block finishes, the link layer address will be on the
3132 ll_ifma = if_findmulti(ifp, llsa);
3133 if (ll_ifma == NULL) {
3134 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT);
3135 if (ll_ifma == NULL) {
3136 --ifma->ifma_refcount;
3141 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma,
3144 ll_ifma->ifma_refcount++;
3145 ifma->ifma_llifma = ll_ifma;
3149 * We now have a new multicast address, ifma, and possibly a new or
3150 * referenced link layer address. Add the primary address to the
3151 * ifnet address list.
3153 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
3155 if (retifma != NULL)
3159 * Must generate the message while holding the lock so that 'ifma'
3160 * pointer is still valid.
3162 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
3163 IF_ADDR_WUNLOCK(ifp);
3166 * We are certain we have added something, so call down to the
3167 * interface to let them know about it.
3169 if (ifp->if_ioctl != NULL) {
3170 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
3173 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3174 link_free_sdl(llsa);
3179 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl))
3180 link_free_sdl(llsa);
3183 IF_ADDR_WUNLOCK(ifp);
3188 * Delete a multicast group membership by network-layer group address.
3190 * Returns ENOENT if the entry could not be found. If ifp no longer
3191 * exists, results are undefined. This entry point should only be used
3192 * from subsystems which do appropriate locking to hold ifp for the
3193 * duration of the call.
3194 * Network-layer protocol domains must use if_delmulti_ifma().
3197 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
3199 struct ifmultiaddr *ifma;
3204 IFNET_RLOCK_NOSLEEP();
3205 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3210 IFNET_RUNLOCK_NOSLEEP();
3212 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__));
3219 ifma = if_findmulti(ifp, sa);
3221 lastref = if_delmulti_locked(ifp, ifma, 0);
3222 IF_ADDR_WUNLOCK(ifp);
3227 if (lastref && ifp->if_ioctl != NULL) {
3228 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3235 * Delete all multicast group membership for an interface.
3236 * Should be used to quickly flush all multicast filters.
3239 if_delallmulti(struct ifnet *ifp)
3241 struct ifmultiaddr *ifma;
3242 struct ifmultiaddr *next;
3245 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next)
3246 if_delmulti_locked(ifp, ifma, 0);
3247 IF_ADDR_WUNLOCK(ifp);
3251 * Delete a multicast group membership by group membership pointer.
3252 * Network-layer protocol domains must use this routine.
3254 * It is safe to call this routine if the ifp disappeared.
3257 if_delmulti_ifma(struct ifmultiaddr *ifma)
3262 ifp = ifma->ifma_ifp;
3265 printf("%s: ifma_ifp seems to be detached\n", __func__);
3269 IFNET_RLOCK_NOSLEEP();
3270 TAILQ_FOREACH(oifp, &V_ifnet, if_link)
3274 printf("%s: ifnet %p disappeared\n", __func__, ifp);
3277 IFNET_RUNLOCK_NOSLEEP();
3281 * If and only if the ifnet instance exists: Acquire the address lock.
3286 lastref = if_delmulti_locked(ifp, ifma, 0);
3290 * If and only if the ifnet instance exists:
3291 * Release the address lock.
3292 * If the group was left: update the hardware hash filter.
3294 IF_ADDR_WUNLOCK(ifp);
3295 if (lastref && ifp->if_ioctl != NULL) {
3296 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
3302 * Perform deletion of network-layer and/or link-layer multicast address.
3304 * Return 0 if the reference count was decremented.
3305 * Return 1 if the final reference was released, indicating that the
3306 * hardware hash filter should be reprogrammed.
3309 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching)
3311 struct ifmultiaddr *ll_ifma;
3313 if (ifp != NULL && ifma->ifma_ifp != NULL) {
3314 KASSERT(ifma->ifma_ifp == ifp,
3315 ("%s: inconsistent ifp %p", __func__, ifp));
3316 IF_ADDR_WLOCK_ASSERT(ifp);
3319 ifp = ifma->ifma_ifp;
3322 * If the ifnet is detaching, null out references to ifnet,
3323 * so that upper protocol layers will notice, and not attempt
3324 * to obtain locks for an ifnet which no longer exists. The
3325 * routing socket announcement must happen before the ifnet
3326 * instance is detached from the system.
3330 printf("%s: detaching ifnet instance %p\n", __func__, ifp);
3333 * ifp may already be nulled out if we are being reentered
3334 * to delete the ll_ifma.
3337 rt_newmaddrmsg(RTM_DELMADDR, ifma);
3338 ifma->ifma_ifp = NULL;
3342 if (--ifma->ifma_refcount > 0)
3346 * If this ifma is a network-layer ifma, a link-layer ifma may
3347 * have been associated with it. Release it first if so.
3349 ll_ifma = ifma->ifma_llifma;
3350 if (ll_ifma != NULL) {
3351 KASSERT(ifma->ifma_lladdr != NULL,
3352 ("%s: llifma w/o lladdr", __func__));
3354 ll_ifma->ifma_ifp = NULL; /* XXX */
3355 if (--ll_ifma->ifma_refcount == 0) {
3357 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma,
3360 if_freemulti(ll_ifma);
3365 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
3370 * The last reference to this instance of struct ifmultiaddr
3371 * was released; the hardware should be notified of this change.
3377 * Set the link layer address on an interface.
3379 * At this time we only support certain types of interfaces,
3380 * and we don't allow the length of the address to change.
3382 * Set noinline to be dtrace-friendly
3385 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
3387 struct sockaddr_dl *sdl;
3394 IF_ADDR_RUNLOCK(ifp);
3398 IF_ADDR_RUNLOCK(ifp);
3399 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
3404 if (len != sdl->sdl_alen) { /* don't allow length to change */
3408 switch (ifp->if_type) {
3416 case IFT_IEEE8023ADLAG:
3418 bcopy(lladdr, LLADDR(sdl), len);
3427 * If the interface is already up, we need
3428 * to re-init it in order to reprogram its
3431 if ((ifp->if_flags & IFF_UP) != 0) {
3432 if (ifp->if_ioctl) {
3433 ifp->if_flags &= ~IFF_UP;
3434 ifr.ifr_flags = ifp->if_flags & 0xffff;
3435 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3436 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3437 ifp->if_flags |= IFF_UP;
3438 ifr.ifr_flags = ifp->if_flags & 0xffff;
3439 ifr.ifr_flagshigh = ifp->if_flags >> 16;
3440 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
3443 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
3448 * Compat function for handling basic encapsulation requests.
3449 * Not converted stacks (FDDI, IB, ..) supports traditional
3450 * output model: ARP (and other similar L2 protocols) are handled
3451 * inside output routine, arpresolve/nd6_resolve() returns MAC
3452 * address instead of full prepend.
3454 * This function creates calculated header==MAC for IPv4/IPv6 and
3455 * returns EAFNOSUPPORT (which is then handled in ARP code) for other
3459 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req)
3462 if (req->rtype != IFENCAP_LL)
3463 return (EOPNOTSUPP);
3465 if (req->bufsize < req->lladdr_len)
3468 switch (req->family) {
3473 return (EAFNOSUPPORT);
3476 /* Copy lladdr to storage as is */
3477 memmove(req->buf, req->lladdr, req->lladdr_len);
3478 req->bufsize = req->lladdr_len;
3479 req->lladdr_off = 0;
3485 * The name argument must be a pointer to storage which will last as
3486 * long as the interface does. For physical devices, the result of
3487 * device_get_name(dev) is a good choice and for pseudo-devices a
3488 * static string works well.
3491 if_initname(struct ifnet *ifp, const char *name, int unit)
3493 ifp->if_dname = name;
3494 ifp->if_dunit = unit;
3495 if (unit != IF_DUNIT_NONE)
3496 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
3498 strlcpy(ifp->if_xname, name, IFNAMSIZ);
3502 if_printf(struct ifnet *ifp, const char * fmt, ...)
3507 retval = printf("%s: ", ifp->if_xname);
3509 retval += vprintf(fmt, ap);
3515 if_start(struct ifnet *ifp)
3518 (*(ifp)->if_start)(ifp);
3522 * Backwards compatibility interface for drivers
3523 * that have not implemented it
3526 if_transmit(struct ifnet *ifp, struct mbuf *m)
3530 IFQ_HANDOFF(ifp, m, error);
3535 if_input_default(struct ifnet *ifp __unused, struct mbuf *m)
3542 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
3547 if (_IF_QFULL(ifq)) {
3549 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1);
3554 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust);
3555 if (m->m_flags & (M_BCAST|M_MCAST))
3556 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1);
3557 active = ifp->if_drv_flags & IFF_DRV_OACTIVE;
3559 _IF_ENQUEUE(ifq, m);
3561 if (ifp != NULL && !active)
3562 (*(ifp)->if_start)(ifp);
3567 if_register_com_alloc(u_char type,
3568 if_com_alloc_t *a, if_com_free_t *f)
3571 KASSERT(if_com_alloc[type] == NULL,
3572 ("if_register_com_alloc: %d already registered", type));
3573 KASSERT(if_com_free[type] == NULL,
3574 ("if_register_com_alloc: %d free already registered", type));
3576 if_com_alloc[type] = a;
3577 if_com_free[type] = f;
3581 if_deregister_com_alloc(u_char type)
3584 KASSERT(if_com_alloc[type] != NULL,
3585 ("if_deregister_com_alloc: %d not registered", type));
3586 KASSERT(if_com_free[type] != NULL,
3587 ("if_deregister_com_alloc: %d free not registered", type));
3588 if_com_alloc[type] = NULL;
3589 if_com_free[type] = NULL;
3592 /* API for driver access to network stack owned ifnet.*/
3594 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate)
3598 oldbrate = ifp->if_baudrate;
3599 ifp->if_baudrate = baudrate;
3604 if_getbaudrate(if_t ifp)
3607 return (((struct ifnet *)ifp)->if_baudrate);
3611 if_setcapabilities(if_t ifp, int capabilities)
3613 ((struct ifnet *)ifp)->if_capabilities = capabilities;
3618 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit)
3620 ((struct ifnet *)ifp)->if_capabilities |= setbit;
3621 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit;
3627 if_getcapabilities(if_t ifp)
3629 return ((struct ifnet *)ifp)->if_capabilities;
3633 if_setcapenable(if_t ifp, int capabilities)
3635 ((struct ifnet *)ifp)->if_capenable = capabilities;
3640 if_setcapenablebit(if_t ifp, int setcap, int clearcap)
3643 ((struct ifnet *)ifp)->if_capenable |= setcap;
3645 ((struct ifnet *)ifp)->if_capenable &= ~clearcap;
3651 if_getdname(if_t ifp)
3653 return ((struct ifnet *)ifp)->if_dname;
3657 if_togglecapenable(if_t ifp, int togglecap)
3659 ((struct ifnet *)ifp)->if_capenable ^= togglecap;
3664 if_getcapenable(if_t ifp)
3666 return ((struct ifnet *)ifp)->if_capenable;
3670 * This is largely undesirable because it ties ifnet to a device, but does
3671 * provide flexiblity for an embedded product vendor. Should be used with
3672 * the understanding that it violates the interface boundaries, and should be
3673 * a last resort only.
3676 if_setdev(if_t ifp, void *dev)
3682 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags)
3684 ((struct ifnet *)ifp)->if_drv_flags |= set_flags;
3685 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags;
3691 if_getdrvflags(if_t ifp)
3693 return ((struct ifnet *)ifp)->if_drv_flags;
3697 if_setdrvflags(if_t ifp, int flags)
3699 ((struct ifnet *)ifp)->if_drv_flags = flags;
3705 if_setflags(if_t ifp, int flags)
3707 ((struct ifnet *)ifp)->if_flags = flags;
3712 if_setflagbits(if_t ifp, int set, int clear)
3714 ((struct ifnet *)ifp)->if_flags |= set;
3715 ((struct ifnet *)ifp)->if_flags &= ~clear;
3721 if_getflags(if_t ifp)
3723 return ((struct ifnet *)ifp)->if_flags;
3727 if_clearhwassist(if_t ifp)
3729 ((struct ifnet *)ifp)->if_hwassist = 0;
3734 if_sethwassistbits(if_t ifp, int toset, int toclear)
3736 ((struct ifnet *)ifp)->if_hwassist |= toset;
3737 ((struct ifnet *)ifp)->if_hwassist &= ~toclear;
3743 if_sethwassist(if_t ifp, int hwassist_bit)
3745 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit;
3750 if_gethwassist(if_t ifp)
3752 return ((struct ifnet *)ifp)->if_hwassist;
3756 if_setmtu(if_t ifp, int mtu)
3758 ((struct ifnet *)ifp)->if_mtu = mtu;
3765 return ((struct ifnet *)ifp)->if_mtu;
3769 if_getmtu_family(if_t ifp, int family)
3773 for (dp = domains; dp; dp = dp->dom_next) {
3774 if (dp->dom_family == family && dp->dom_ifmtu != NULL)
3775 return (dp->dom_ifmtu((struct ifnet *)ifp));
3778 return (((struct ifnet *)ifp)->if_mtu);
3782 if_setsoftc(if_t ifp, void *softc)
3784 ((struct ifnet *)ifp)->if_softc = softc;
3789 if_getsoftc(if_t ifp)
3791 return ((struct ifnet *)ifp)->if_softc;
3795 if_setrcvif(struct mbuf *m, if_t ifp)
3797 m->m_pkthdr.rcvif = (struct ifnet *)ifp;
3801 if_setvtag(struct mbuf *m, uint16_t tag)
3803 m->m_pkthdr.ether_vtag = tag;
3807 if_getvtag(struct mbuf *m)
3810 return (m->m_pkthdr.ether_vtag);
3814 if_sendq_empty(if_t ifp)
3816 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd);
3820 if_getifaddr(if_t ifp)
3822 return ((struct ifnet *)ifp)->if_addr;
3826 if_getamcount(if_t ifp)
3828 return ((struct ifnet *)ifp)->if_amcount;
3833 if_setsendqready(if_t ifp)
3835 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd);
3840 if_setsendqlen(if_t ifp, int tx_desc_count)
3842 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count);
3843 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count;
3849 if_vlantrunkinuse(if_t ifp)
3851 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0;
3855 if_input(if_t ifp, struct mbuf* sendmp)
3857 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp);
3863 #ifndef ETH_ADDR_LEN
3864 #define ETH_ADDR_LEN 6
3868 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max)
3870 struct ifmultiaddr *ifma;
3871 uint8_t *lmta = (uint8_t *)mta;
3874 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3875 if (ifma->ifma_addr->sa_family != AF_LINK)
3881 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr),
3882 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN);
3891 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max)
3895 if_maddr_rlock(ifp);
3896 error = if_setupmultiaddr(ifp, mta, cnt, max);
3897 if_maddr_runlock(ifp);
3902 if_multiaddr_count(if_t ifp, int max)
3904 struct ifmultiaddr *ifma;
3908 if_maddr_rlock(ifp);
3909 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) {
3910 if (ifma->ifma_addr->sa_family != AF_LINK)
3916 if_maddr_runlock(ifp);
3921 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg)
3923 struct ifmultiaddr *ifma;
3926 if_maddr_rlock(ifp);
3927 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
3928 cnt += filter(arg, ifma, cnt);
3929 if_maddr_runlock(ifp);
3934 if_dequeue(if_t ifp)
3937 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m);
3943 if_sendq_prepend(if_t ifp, struct mbuf *m)
3945 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m);
3950 if_setifheaderlen(if_t ifp, int len)
3952 ((struct ifnet *)ifp)->if_hdrlen = len;
3957 if_getlladdr(if_t ifp)
3959 return (IF_LLADDR((struct ifnet *)ifp));
3963 if_gethandle(u_char type)
3965 return (if_alloc(type));
3969 if_bpfmtap(if_t ifh, struct mbuf *m)
3971 struct ifnet *ifp = (struct ifnet *)ifh;
3977 if_etherbpfmtap(if_t ifh, struct mbuf *m)
3979 struct ifnet *ifp = (struct ifnet *)ifh;
3981 ETHER_BPF_MTAP(ifp, m);
3985 if_vlancap(if_t ifh)
3987 struct ifnet *ifp = (struct ifnet *)ifh;
3988 VLAN_CAPABILITIES(ifp);
3992 if_setinitfn(if_t ifp, void (*init_fn)(void *))
3994 ((struct ifnet *)ifp)->if_init = init_fn;
3998 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t))
4000 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn;
4004 if_setstartfn(if_t ifp, void (*start_fn)(if_t))
4006 ((struct ifnet *)ifp)->if_start = (void *)start_fn;
4010 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn)
4012 ((struct ifnet *)ifp)->if_transmit = start_fn;
4015 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn)
4017 ((struct ifnet *)ifp)->if_qflush = flush_fn;
4022 if_setgetcounterfn(if_t ifp, if_get_counter_t fn)
4025 ifp->if_get_counter = fn;
4028 /* Revisit these - These are inline functions originally. */
4030 drbr_inuse_drv(if_t ifh, struct buf_ring *br)
4032 return drbr_inuse(ifh, br);
4036 drbr_dequeue_drv(if_t ifh, struct buf_ring *br)
4038 return drbr_dequeue(ifh, br);
4042 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br)
4044 return drbr_needs_enqueue(ifh, br);
4048 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m)
4050 return drbr_enqueue(ifh, br, m);