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 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#)if.c 8.3 (Berkeley) 1/4/94
34 * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $
35 * $DragonFly: src/sys/net/if.c,v 1.84 2008/11/15 11:58:16 sephe Exp $
38 #include "opt_compat.h"
39 #include "opt_inet6.h"
41 #include "opt_polling.h"
42 #include "opt_ifpoll.h"
44 #include <sys/param.h>
45 #include <sys/malloc.h>
47 #include <sys/systm.h>
50 #include <sys/protosw.h>
51 #include <sys/socket.h>
52 #include <sys/socketvar.h>
53 #include <sys/socketops.h>
54 #include <sys/protosw.h>
55 #include <sys/kernel.h>
57 #include <sys/sockio.h>
58 #include <sys/syslog.h>
59 #include <sys/sysctl.h>
60 #include <sys/domain.h>
61 #include <sys/thread.h>
62 #include <sys/thread2.h>
63 #include <sys/serialize.h>
64 #include <sys/msgport2.h>
68 #include <net/if_arp.h>
69 #include <net/if_dl.h>
70 #include <net/if_types.h>
71 #include <net/if_var.h>
72 #include <net/ifq_var.h>
73 #include <net/radix.h>
74 #include <net/route.h>
75 #include <net/if_clone.h>
76 #include <net/netisr.h>
77 #include <net/netmsg2.h>
79 #include <machine/atomic.h>
80 #include <machine/stdarg.h>
81 #include <machine/smp.h>
83 #if defined(INET) || defined(INET6)
85 #include <netinet/in.h>
86 #include <netinet/in_var.h>
87 #include <netinet/if_ether.h>
89 #include <netinet6/in6_var.h>
90 #include <netinet6/in6_ifattach.h>
94 #if defined(COMPAT_43)
95 #include <emulation/43bsd/43bsd_socket.h>
96 #endif /* COMPAT_43 */
98 struct netmsg_ifaddr {
106 * System initialization
108 static void if_attachdomain(void *);
109 static void if_attachdomain1(struct ifnet *);
110 static int ifconf(u_long, caddr_t, struct ucred *);
111 static void ifinit(void *);
112 static void ifnetinit(void *);
113 static void if_slowtimo(void *);
114 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
115 static int if_rtdel(struct radix_node *, void *);
119 * XXX: declare here to avoid to include many inet6 related files..
120 * should be more generalized?
122 extern void nd6_setmtu(struct ifnet *);
125 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
126 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
128 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
129 /* Must be after netisr_init */
130 SYSINIT(ifnet, SI_SUB_PRE_DRIVERS, SI_ORDER_SECOND, ifnetinit, NULL)
132 static if_com_alloc_t *if_com_alloc[256];
133 static if_com_free_t *if_com_free[256];
135 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
136 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
137 MALLOC_DEFINE(M_IFNET, "ifnet", "interface structure");
139 int ifqmaxlen = IFQ_MAXLEN;
140 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet);
142 /* In ifq_dispatch(), try to do direct ifnet.if_start first */
143 static int ifq_dispatch_schedonly = 0;
144 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schedonly, CTLFLAG_RW,
145 &ifq_dispatch_schedonly, 0, "");
147 /* In ifq_dispatch(), schedule ifnet.if_start without checking ifnet.if_snd */
148 static int ifq_dispatch_schednochk = 0;
149 SYSCTL_INT(_net_link_generic, OID_AUTO, ifq_dispatch_schednochk, CTLFLAG_RW,
150 &ifq_dispatch_schednochk, 0, "");
152 /* In if_devstart(), try to do direct ifnet.if_start first */
153 static int if_devstart_schedonly = 0;
154 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schedonly, CTLFLAG_RW,
155 &if_devstart_schedonly, 0, "");
157 /* In if_devstart(), schedule ifnet.if_start without checking ifnet.if_snd */
158 static int if_devstart_schednochk = 0;
159 SYSCTL_INT(_net_link_generic, OID_AUTO, if_devstart_schednochk, CTLFLAG_RW,
160 &if_devstart_schednochk, 0, "");
163 /* Schedule ifnet.if_start on the current CPU */
164 static int if_start_oncpu_sched = 0;
165 SYSCTL_INT(_net_link_generic, OID_AUTO, if_start_oncpu_sched, CTLFLAG_RW,
166 &if_start_oncpu_sched, 0, "");
169 struct callout if_slowtimo_timer;
172 struct ifnet **ifindex2ifnet = NULL;
173 static struct thread ifnet_threads[MAXCPU];
174 static int ifnet_mpsafe_thread = NETMSG_SERVICE_MPSAFE;
176 #define IFQ_KTR_STRING "ifq=%p"
177 #define IFQ_KTR_ARG_SIZE (sizeof(void *))
179 #define KTR_IFQ KTR_ALL
181 KTR_INFO_MASTER(ifq);
182 KTR_INFO(KTR_IFQ, ifq, enqueue, 0, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE);
183 KTR_INFO(KTR_IFQ, ifq, dequeue, 1, IFQ_KTR_STRING, IFQ_KTR_ARG_SIZE);
184 #define logifq(name, arg) KTR_LOG(ifq_ ## name, arg)
186 #define IF_START_KTR_STRING "ifp=%p"
187 #define IF_START_KTR_ARG_SIZE (sizeof(void *))
189 #define KTR_IF_START KTR_ALL
191 KTR_INFO_MASTER(if_start);
192 KTR_INFO(KTR_IF_START, if_start, run, 0,
193 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE);
194 KTR_INFO(KTR_IF_START, if_start, sched, 1,
195 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE);
196 KTR_INFO(KTR_IF_START, if_start, avoid, 2,
197 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE);
198 KTR_INFO(KTR_IF_START, if_start, contend_sched, 3,
199 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE);
201 KTR_INFO(KTR_IF_START, if_start, chase_sched, 4,
202 IF_START_KTR_STRING, IF_START_KTR_ARG_SIZE);
204 #define logifstart(name, arg) KTR_LOG(if_start_ ## name, arg)
207 * Network interface utility routines.
209 * Routines with ifa_ifwith* names take sockaddr *'s as
218 callout_init(&if_slowtimo_timer);
221 TAILQ_FOREACH(ifp, &ifnet, if_link) {
222 if (ifp->if_snd.ifq_maxlen == 0) {
223 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
224 ifp->if_snd.ifq_maxlen = ifqmaxlen;
233 if_start_cpuid(struct ifnet *ifp)
235 return ifp->if_cpuid;
238 #ifdef DEVICE_POLLING
240 if_start_cpuid_poll(struct ifnet *ifp)
242 int poll_cpuid = ifp->if_poll_cpuid;
247 return ifp->if_cpuid;
252 if_start_ipifunc(void *arg)
254 struct ifnet *ifp = arg;
255 struct lwkt_msg *lmsg = &ifp->if_start_nmsg[mycpuid].nm_lmsg;
258 if (lmsg->ms_flags & MSGF_DONE)
259 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg);
264 * Schedule ifnet.if_start on ifnet's CPU
267 if_start_schedule(struct ifnet *ifp)
272 if (if_start_oncpu_sched)
275 cpu = ifp->if_start_cpuid(ifp);
278 lwkt_send_ipiq(globaldata_find(cpu), if_start_ipifunc, ifp);
281 if_start_ipifunc(ifp);
286 * This function will release ifnet.if_start interlock,
287 * if ifnet.if_start does not need to be scheduled
290 if_start_need_schedule(struct ifaltq *ifq, int running)
292 if (!running || ifq_is_empty(ifq)
294 || ifq->altq_tbr != NULL
299 * ifnet.if_start interlock is released, if:
300 * 1) Hardware can not take any packets, due to
301 * o interface is marked down
302 * o hardware queue is full (IFF_OACTIVE)
303 * Under the second situation, hardware interrupt
304 * or polling(4) will call/schedule ifnet.if_start
305 * when hardware queue is ready
306 * 2) There is not packet in the ifnet.if_snd.
307 * Further ifq_dispatch or ifq_handoff will call/
308 * schedule ifnet.if_start
309 * 3) TBR is used and it does not allow further
311 * TBR callout will call ifnet.if_start
313 if (!running || !ifq_data_ready(ifq)) {
314 ifq->altq_started = 0;
324 if_start_dispatch(struct netmsg *nmsg)
326 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
327 struct ifnet *ifp = lmsg->u.ms_resultp;
328 struct ifaltq *ifq = &ifp->if_snd;
332 lwkt_replymsg(lmsg, 0); /* reply ASAP */
336 if (!if_start_oncpu_sched && mycpuid != ifp->if_start_cpuid(ifp)) {
338 * If the ifnet is still up, we need to
339 * chase its CPU change.
341 if (ifp->if_flags & IFF_UP) {
342 logifstart(chase_sched, ifp);
343 if_start_schedule(ifp);
351 if (ifp->if_flags & IFF_UP) {
352 ifnet_serialize_tx(ifp); /* XXX try? */
353 if ((ifp->if_flags & IFF_OACTIVE) == 0) {
354 logifstart(run, ifp);
357 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING)
360 ifnet_deserialize_tx(ifp);
365 if (if_start_need_schedule(ifq, running)) {
367 if (lmsg->ms_flags & MSGF_DONE) { /* XXX necessary? */
368 logifstart(sched, ifp);
369 lwkt_sendmsg(ifnet_portfn(mycpuid), lmsg);
375 /* Device driver ifnet.if_start helper function */
377 if_devstart(struct ifnet *ifp)
379 struct ifaltq *ifq = &ifp->if_snd;
382 ASSERT_IFNET_SERIALIZED_TX(ifp);
385 if (ifq->altq_started || !ifq_data_ready(ifq)) {
386 logifstart(avoid, ifp);
390 ifq->altq_started = 1;
393 if (if_devstart_schedonly) {
395 * Always schedule ifnet.if_start on ifnet's CPU,
396 * short circuit the rest of this function.
398 logifstart(sched, ifp);
399 if_start_schedule(ifp);
403 logifstart(run, ifp);
406 if ((ifp->if_flags & (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING)
409 if (if_devstart_schednochk || if_start_need_schedule(ifq, running)) {
411 * More data need to be transmitted, ifnet.if_start is
412 * scheduled on ifnet's CPU, and we keep going.
413 * NOTE: ifnet.if_start interlock is not released.
415 logifstart(sched, ifp);
416 if_start_schedule(ifp);
421 if_default_serialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
423 lwkt_serialize_enter(ifp->if_serializer);
427 if_default_deserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
429 lwkt_serialize_exit(ifp->if_serializer);
433 if_default_tryserialize(struct ifnet *ifp, enum ifnet_serialize slz __unused)
435 return lwkt_serialize_try(ifp->if_serializer);
440 if_default_serialize_assert(struct ifnet *ifp,
441 enum ifnet_serialize slz __unused,
442 boolean_t serialized)
445 ASSERT_SERIALIZED(ifp->if_serializer);
447 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
452 * Attach an interface to the list of "active" interfaces.
454 * The serializer is optional. If non-NULL access to the interface
458 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer)
460 unsigned socksize, ifasize;
461 int namelen, masklen;
462 struct sockaddr_dl *sdl;
467 static int if_indexlim = 8;
469 if (ifp->if_serialize != NULL) {
470 KASSERT(ifp->if_deserialize != NULL &&
471 ifp->if_tryserialize != NULL &&
472 ifp->if_serialize_assert != NULL,
473 ("serialize functions are partially setup\n"));
476 * If the device supplies serialize functions,
477 * then clear if_serializer to catch any invalid
478 * usage of this field.
480 KASSERT(serializer == NULL,
481 ("both serialize functions and default serializer "
483 ifp->if_serializer = NULL;
485 KASSERT(ifp->if_deserialize == NULL &&
486 ifp->if_tryserialize == NULL &&
487 ifp->if_serialize_assert == NULL,
488 ("serialize functions are partially setup\n"));
489 ifp->if_serialize = if_default_serialize;
490 ifp->if_deserialize = if_default_deserialize;
491 ifp->if_tryserialize = if_default_tryserialize;
493 ifp->if_serialize_assert = if_default_serialize_assert;
497 * The serializer can be passed in from the device,
498 * allowing the same serializer to be used for both
499 * the interrupt interlock and the device queue.
500 * If not specified, the netif structure will use an
501 * embedded serializer.
503 if (serializer == NULL) {
504 serializer = &ifp->if_default_serializer;
505 lwkt_serialize_init(serializer);
507 ifp->if_serializer = serializer;
510 ifp->if_start_cpuid = if_start_cpuid;
513 #ifdef DEVICE_POLLING
514 /* Device is not in polling mode by default */
515 ifp->if_poll_cpuid = -1;
516 if (ifp->if_poll != NULL)
517 ifp->if_start_cpuid = if_start_cpuid_poll;
520 ifp->if_start_nmsg = kmalloc(ncpus * sizeof(struct netmsg),
521 M_LWKTMSG, M_WAITOK);
522 for (i = 0; i < ncpus; ++i) {
523 netmsg_init(&ifp->if_start_nmsg[i], NULL, &netisr_adone_rport,
524 0, if_start_dispatch);
525 ifp->if_start_nmsg[i].nm_lmsg.u.ms_resultp = ifp;
528 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
529 ifp->if_index = ++if_index;
533 * The old code would work if the interface passed a pre-existing
534 * chain of ifaddrs to this code. We don't trust our callers to
535 * properly initialize the tailq, however, so we no longer allow
536 * this unlikely case.
538 ifp->if_addrheads = kmalloc(ncpus * sizeof(struct ifaddrhead),
539 M_IFADDR, M_WAITOK | M_ZERO);
540 for (i = 0; i < ncpus; ++i)
541 TAILQ_INIT(&ifp->if_addrheads[i]);
543 TAILQ_INIT(&ifp->if_prefixhead);
544 TAILQ_INIT(&ifp->if_multiaddrs);
545 getmicrotime(&ifp->if_lastchange);
546 if (ifindex2ifnet == NULL || if_index >= if_indexlim) {
552 /* grow ifindex2ifnet */
553 n = if_indexlim * sizeof(*q);
554 q = kmalloc(n, M_IFADDR, M_WAITOK | M_ZERO);
556 bcopy(ifindex2ifnet, q, n/2);
557 kfree(ifindex2ifnet, M_IFADDR);
562 ifindex2ifnet[if_index] = ifp;
565 * create a Link Level name for this device
567 namelen = strlen(ifp->if_xname);
568 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
569 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
570 socksize = masklen + ifp->if_addrlen;
571 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
572 if (socksize < sizeof(*sdl))
573 socksize = sizeof(*sdl);
574 socksize = ROUNDUP(socksize);
575 ifasize = sizeof(struct ifaddr) + 2 * socksize;
576 ifa = ifa_create(ifasize, M_WAITOK);
577 sdl = (struct sockaddr_dl *)(ifa + 1);
578 sdl->sdl_len = socksize;
579 sdl->sdl_family = AF_LINK;
580 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
581 sdl->sdl_nlen = namelen;
582 sdl->sdl_index = ifp->if_index;
583 sdl->sdl_type = ifp->if_type;
584 ifp->if_lladdr = ifa;
586 ifa->ifa_rtrequest = link_rtrequest;
587 ifa->ifa_addr = (struct sockaddr *)sdl;
588 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
589 ifa->ifa_netmask = (struct sockaddr *)sdl;
590 sdl->sdl_len = masklen;
592 sdl->sdl_data[--namelen] = 0xff;
593 ifa_iflink(ifa, ifp, 0 /* Insert head */);
595 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
596 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL);
600 ifq->altq_disc = NULL;
601 ifq->altq_flags &= ALTQF_CANTCHANGE;
602 ifq->altq_tbr = NULL;
604 ifq->altq_started = 0;
605 ifq->altq_prepended = NULL;
607 ifq_set_classic(ifq);
609 if (!SLIST_EMPTY(&domains))
610 if_attachdomain1(ifp);
612 /* Announce the interface. */
613 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
617 if_attachdomain(void *dummy)
622 TAILQ_FOREACH(ifp, &ifnet, if_list)
623 if_attachdomain1(ifp);
626 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
627 if_attachdomain, NULL);
630 if_attachdomain1(struct ifnet *ifp)
636 /* address family dependent data region */
637 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
638 SLIST_FOREACH(dp, &domains, dom_next)
639 if (dp->dom_ifattach)
640 ifp->if_afdata[dp->dom_family] =
641 (*dp->dom_ifattach)(ifp);
646 * Purge all addresses whose type is _not_ AF_LINK
649 if_purgeaddrs_nolink(struct ifnet *ifp)
651 struct ifaddr_container *ifac, *next;
653 TAILQ_FOREACH_MUTABLE(ifac, &ifp->if_addrheads[mycpuid],
655 struct ifaddr *ifa = ifac->ifa;
657 /* Leave link ifaddr as it is */
658 if (ifa->ifa_addr->sa_family == AF_LINK)
661 /* XXX: Ugly!! ad hoc just for INET */
662 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
663 struct ifaliasreq ifr;
664 #ifdef IFADDR_DEBUG_VERBOSE
667 kprintf("purge in4 addr %p: ", ifa);
668 for (i = 0; i < ncpus; ++i)
669 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
673 bzero(&ifr, sizeof ifr);
674 ifr.ifra_addr = *ifa->ifa_addr;
675 if (ifa->ifa_dstaddr)
676 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
677 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
683 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
684 #ifdef IFADDR_DEBUG_VERBOSE
687 kprintf("purge in6 addr %p: ", ifa);
688 for (i = 0; i < ncpus; ++i)
689 kprintf("%d ", ifa->ifa_containers[i].ifa_refcnt);
694 /* ifp_addrhead is already updated */
698 ifa_ifunlink(ifa, ifp);
704 * Detach an interface, removing it from the
705 * list of "active" interfaces.
708 if_detach(struct ifnet *ifp)
710 struct radix_node_head *rnh;
715 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
718 * Remove routes and flush queues.
721 #ifdef DEVICE_POLLING
722 if (ifp->if_flags & IFF_POLLING)
723 ether_poll_deregister(ifp);
726 if (ifp->if_flags & IFF_NPOLLING)
727 ifpoll_deregister(ifp);
732 if (ifq_is_enabled(&ifp->if_snd))
733 altq_disable(&ifp->if_snd);
734 if (ifq_is_attached(&ifp->if_snd))
735 altq_detach(&ifp->if_snd);
739 * Clean up all addresses.
741 ifp->if_lladdr = NULL;
743 if_purgeaddrs_nolink(ifp);
744 if (!TAILQ_EMPTY(&ifp->if_addrheads[mycpuid])) {
747 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
748 KASSERT(ifa->ifa_addr->sa_family == AF_LINK,
749 ("non-link ifaddr is left on if_addrheads"));
751 ifa_ifunlink(ifa, ifp);
753 KASSERT(TAILQ_EMPTY(&ifp->if_addrheads[mycpuid]),
754 ("there are still ifaddrs left on if_addrheads"));
759 * Remove all IPv4 kernel structures related to ifp.
766 * Remove all IPv6 kernel structs related to ifp. This should be done
767 * before removing routing entries below, since IPv6 interface direct
768 * routes are expected to be removed by the IPv6-specific kernel API.
769 * Otherwise, the kernel will detect some inconsistency and bark it.
775 * Delete all remaining routes using this interface
776 * Unfortuneatly the only way to do this is to slog through
777 * the entire routing table looking for routes which point
778 * to this interface...oh well...
781 for (cpu = 0; cpu < ncpus2; cpu++) {
782 lwkt_migratecpu(cpu);
783 for (i = 1; i <= AF_MAX; i++) {
784 if ((rnh = rt_tables[cpu][i]) == NULL)
786 rnh->rnh_walktree(rnh, if_rtdel, ifp);
789 lwkt_migratecpu(origcpu);
791 /* Announce that the interface is gone. */
792 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
793 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL);
795 SLIST_FOREACH(dp, &domains, dom_next)
796 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
797 (*dp->dom_ifdetach)(ifp,
798 ifp->if_afdata[dp->dom_family]);
801 * Remove interface from ifindex2ifp[] and maybe decrement if_index.
803 ifindex2ifnet[ifp->if_index] = NULL;
804 while (if_index > 0 && ifindex2ifnet[if_index] == NULL)
807 TAILQ_REMOVE(&ifnet, ifp, if_link);
808 kfree(ifp->if_addrheads, M_IFADDR);
809 kfree(ifp->if_start_nmsg, M_LWKTMSG);
814 * Delete Routes for a Network Interface
816 * Called for each routing entry via the rnh->rnh_walktree() call above
817 * to delete all route entries referencing a detaching network interface.
820 * rn pointer to node in the routing table
821 * arg argument passed to rnh->rnh_walktree() - detaching interface
825 * errno failed - reason indicated
829 if_rtdel(struct radix_node *rn, void *arg)
831 struct rtentry *rt = (struct rtentry *)rn;
832 struct ifnet *ifp = arg;
835 if (rt->rt_ifp == ifp) {
838 * Protect (sorta) against walktree recursion problems
841 if (!(rt->rt_flags & RTF_UP))
844 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
845 rt_mask(rt), rt->rt_flags,
848 log(LOG_WARNING, "if_rtdel: error %d\n", err);
856 * Locate an interface based on a complete address.
859 ifa_ifwithaddr(struct sockaddr *addr)
863 TAILQ_FOREACH(ifp, &ifnet, if_link) {
864 struct ifaddr_container *ifac;
866 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
867 struct ifaddr *ifa = ifac->ifa;
869 if (ifa->ifa_addr->sa_family != addr->sa_family)
871 if (sa_equal(addr, ifa->ifa_addr))
873 if ((ifp->if_flags & IFF_BROADCAST) &&
874 ifa->ifa_broadaddr &&
875 /* IPv6 doesn't have broadcast */
876 ifa->ifa_broadaddr->sa_len != 0 &&
877 sa_equal(ifa->ifa_broadaddr, addr))
884 * Locate the point to point interface with a given destination address.
887 ifa_ifwithdstaddr(struct sockaddr *addr)
891 TAILQ_FOREACH(ifp, &ifnet, if_link) {
892 struct ifaddr_container *ifac;
894 if (!(ifp->if_flags & IFF_POINTOPOINT))
897 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
898 struct ifaddr *ifa = ifac->ifa;
900 if (ifa->ifa_addr->sa_family != addr->sa_family)
902 if (ifa->ifa_dstaddr &&
903 sa_equal(addr, ifa->ifa_dstaddr))
911 * Find an interface on a specific network. If many, choice
912 * is most specific found.
915 ifa_ifwithnet(struct sockaddr *addr)
918 struct ifaddr *ifa_maybe = NULL;
919 u_int af = addr->sa_family;
920 char *addr_data = addr->sa_data, *cplim;
923 * AF_LINK addresses can be looked up directly by their index number,
924 * so do that if we can.
927 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
929 if (sdl->sdl_index && sdl->sdl_index <= if_index)
930 return (ifindex2ifnet[sdl->sdl_index]->if_lladdr);
934 * Scan though each interface, looking for ones that have
935 * addresses in this address family.
937 TAILQ_FOREACH(ifp, &ifnet, if_link) {
938 struct ifaddr_container *ifac;
940 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
941 struct ifaddr *ifa = ifac->ifa;
942 char *cp, *cp2, *cp3;
944 if (ifa->ifa_addr->sa_family != af)
946 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
948 * This is a bit broken as it doesn't
949 * take into account that the remote end may
950 * be a single node in the network we are
952 * The trouble is that we don't know the
953 * netmask for the remote end.
955 if (ifa->ifa_dstaddr != NULL &&
956 sa_equal(addr, ifa->ifa_dstaddr))
960 * if we have a special address handler,
961 * then use it instead of the generic one.
963 if (ifa->ifa_claim_addr) {
964 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
972 * Scan all the bits in the ifa's address.
973 * If a bit dissagrees with what we are
974 * looking for, mask it with the netmask
975 * to see if it really matters.
978 if (ifa->ifa_netmask == 0)
981 cp2 = ifa->ifa_addr->sa_data;
982 cp3 = ifa->ifa_netmask->sa_data;
983 cplim = ifa->ifa_netmask->sa_len +
984 (char *)ifa->ifa_netmask;
986 if ((*cp++ ^ *cp2++) & *cp3++)
987 goto next; /* next address! */
989 * If the netmask of what we just found
990 * is more specific than what we had before
991 * (if we had one) then remember the new one
992 * before continuing to search
993 * for an even better one.
995 if (ifa_maybe == 0 ||
996 rn_refines((char *)ifa->ifa_netmask,
997 (char *)ifa_maybe->ifa_netmask))
1006 * Find an interface address specific to an interface best matching
1010 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
1012 struct ifaddr_container *ifac;
1013 char *cp, *cp2, *cp3;
1015 struct ifaddr *ifa_maybe = 0;
1016 u_int af = addr->sa_family;
1020 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1021 struct ifaddr *ifa = ifac->ifa;
1023 if (ifa->ifa_addr->sa_family != af)
1027 if (ifa->ifa_netmask == NULL) {
1028 if (sa_equal(addr, ifa->ifa_addr) ||
1029 (ifa->ifa_dstaddr != NULL &&
1030 sa_equal(addr, ifa->ifa_dstaddr)))
1034 if (ifp->if_flags & IFF_POINTOPOINT) {
1035 if (sa_equal(addr, ifa->ifa_dstaddr))
1039 cp2 = ifa->ifa_addr->sa_data;
1040 cp3 = ifa->ifa_netmask->sa_data;
1041 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
1042 for (; cp3 < cplim; cp3++)
1043 if ((*cp++ ^ *cp2++) & *cp3)
1053 * Default action when installing a route with a Link Level gateway.
1054 * Lookup an appropriate real ifa to point to.
1055 * This should be moved to /sys/net/link.c eventually.
1058 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
1061 struct sockaddr *dst;
1064 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
1065 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
1067 ifa = ifaof_ifpforaddr(dst, ifp);
1069 IFAFREE(rt->rt_ifa);
1072 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1073 ifa->ifa_rtrequest(cmd, rt, info);
1078 * Mark an interface down and notify protocols of
1080 * NOTE: must be called at splnet or eqivalent.
1083 if_unroute(struct ifnet *ifp, int flag, int fam)
1085 struct ifaddr_container *ifac;
1087 ifp->if_flags &= ~flag;
1088 getmicrotime(&ifp->if_lastchange);
1089 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1090 struct ifaddr *ifa = ifac->ifa;
1092 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1093 kpfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1095 ifq_purge(&ifp->if_snd);
1100 * Mark an interface up and notify protocols of
1102 * NOTE: must be called at splnet or eqivalent.
1105 if_route(struct ifnet *ifp, int flag, int fam)
1107 struct ifaddr_container *ifac;
1109 ifq_purge(&ifp->if_snd);
1110 ifp->if_flags |= flag;
1111 getmicrotime(&ifp->if_lastchange);
1112 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1113 struct ifaddr *ifa = ifac->ifa;
1115 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1116 kpfctlinput(PRC_IFUP, ifa->ifa_addr);
1125 * Mark an interface down and notify protocols of the transition. An
1126 * interface going down is also considered to be a synchronizing event.
1127 * We must ensure that all packet processing related to the interface
1128 * has completed before we return so e.g. the caller can free the ifnet
1129 * structure that the mbufs may be referencing.
1131 * NOTE: must be called at splnet or eqivalent.
1134 if_down(struct ifnet *ifp)
1136 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1137 netmsg_service_sync();
1141 * Mark an interface up and notify protocols of
1143 * NOTE: must be called at splnet or eqivalent.
1146 if_up(struct ifnet *ifp)
1148 if_route(ifp, IFF_UP, AF_UNSPEC);
1152 * Process a link state change.
1153 * NOTE: must be called at splsoftnet or equivalent.
1156 if_link_state_change(struct ifnet *ifp)
1158 int link_state = ifp->if_link_state;
1161 devctl_notify("IFNET", ifp->if_xname,
1162 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL);
1166 * Handle interface watchdog timer routines. Called
1167 * from softclock, we decrement timers (if set) and
1168 * call the appropriate interface routine on expiration.
1171 if_slowtimo(void *arg)
1177 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1178 if (ifp->if_timer == 0 || --ifp->if_timer)
1180 if (ifp->if_watchdog) {
1181 if (ifnet_tryserialize_all(ifp)) {
1182 (*ifp->if_watchdog)(ifp);
1183 ifnet_deserialize_all(ifp);
1185 /* try again next timeout */
1193 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
1197 * Map interface name to
1198 * interface structure pointer.
1201 ifunit(const char *name)
1206 * Search all the interfaces for this name/number
1209 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1210 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1218 * Map interface name in a sockaddr_dl to
1219 * interface structure pointer.
1222 if_withname(struct sockaddr *sa)
1224 char ifname[IFNAMSIZ+1];
1225 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1227 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1228 (sdl->sdl_nlen > IFNAMSIZ) )
1232 * ifunit wants a null-terminated name. It may not be null-terminated
1233 * in the sockaddr. We don't want to change the caller's sockaddr,
1234 * and there might not be room to put the trailing null anyway, so we
1235 * make a local copy that we know we can null terminate safely.
1238 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1239 ifname[sdl->sdl_nlen] = '\0';
1240 return ifunit(ifname);
1248 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred)
1256 size_t namelen, onamelen;
1257 char new_name[IFNAMSIZ];
1259 struct sockaddr_dl *sdl;
1265 return (ifconf(cmd, data, cred));
1267 ifr = (struct ifreq *)data;
1272 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1274 return (if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name),
1275 cmd == SIOCIFCREATE2 ? ifr->ifr_data : NULL));
1277 if ((error = priv_check_cred(cred, PRIV_ROOT, 0)) != 0)
1279 return (if_clone_destroy(ifr->ifr_name));
1281 case SIOCIFGCLONERS:
1282 return (if_clone_list((struct if_clonereq *)data));
1285 ifp = ifunit(ifr->ifr_name);
1291 ifr->ifr_index = ifp->if_index;
1295 ifr->ifr_flags = ifp->if_flags;
1296 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1300 ifr->ifr_reqcap = ifp->if_capabilities;
1301 ifr->ifr_curcap = ifp->if_capenable;
1305 ifr->ifr_metric = ifp->if_metric;
1309 ifr->ifr_mtu = ifp->if_mtu;
1313 ifr->ifr_phys = ifp->if_physical;
1316 case SIOCGIFPOLLCPU:
1317 #ifdef DEVICE_POLLING
1318 ifr->ifr_pollcpu = ifp->if_poll_cpuid;
1320 ifr->ifr_pollcpu = -1;
1324 case SIOCSIFPOLLCPU:
1325 #ifdef DEVICE_POLLING
1326 if ((ifp->if_flags & IFF_POLLING) == 0)
1327 ether_pollcpu_register(ifp, ifr->ifr_pollcpu);
1332 error = priv_check_cred(cred, PRIV_ROOT, 0);
1335 new_flags = (ifr->ifr_flags & 0xffff) |
1336 (ifr->ifr_flagshigh << 16);
1337 if (ifp->if_flags & IFF_SMART) {
1338 /* Smart drivers twiddle their own routes */
1339 } else if (ifp->if_flags & IFF_UP &&
1340 (new_flags & IFF_UP) == 0) {
1344 } else if (new_flags & IFF_UP &&
1345 (ifp->if_flags & IFF_UP) == 0) {
1351 #ifdef DEVICE_POLLING
1352 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1353 if (new_flags & IFF_POLLING) {
1354 ether_poll_register(ifp);
1356 ether_poll_deregister(ifp);
1360 #ifdef IFPOLL_ENABLE
1361 if ((new_flags ^ ifp->if_flags) & IFF_NPOLLING) {
1362 if (new_flags & IFF_NPOLLING)
1363 ifpoll_register(ifp);
1365 ifpoll_deregister(ifp);
1369 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1370 (new_flags &~ IFF_CANTCHANGE);
1371 if (new_flags & IFF_PPROMISC) {
1372 /* Permanently promiscuous mode requested */
1373 ifp->if_flags |= IFF_PROMISC;
1374 } else if (ifp->if_pcount == 0) {
1375 ifp->if_flags &= ~IFF_PROMISC;
1377 if (ifp->if_ioctl) {
1378 ifnet_serialize_all(ifp);
1379 ifp->if_ioctl(ifp, cmd, data, cred);
1380 ifnet_deserialize_all(ifp);
1382 getmicrotime(&ifp->if_lastchange);
1386 error = priv_check_cred(cred, PRIV_ROOT, 0);
1389 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1391 ifnet_serialize_all(ifp);
1392 ifp->if_ioctl(ifp, cmd, data, cred);
1393 ifnet_deserialize_all(ifp);
1397 error = priv_check_cred(cred, PRIV_ROOT, 0);
1400 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1403 if (new_name[0] == '\0')
1405 if (ifunit(new_name) != NULL)
1408 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1410 /* Announce the departure of the interface. */
1411 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1413 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1414 ifa = TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
1415 /* XXX IFA_LOCK(ifa); */
1416 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1417 namelen = strlen(new_name);
1418 onamelen = sdl->sdl_nlen;
1420 * Move the address if needed. This is safe because we
1421 * allocate space for a name of length IFNAMSIZ when we
1422 * create this in if_attach().
1424 if (namelen != onamelen) {
1425 bcopy(sdl->sdl_data + onamelen,
1426 sdl->sdl_data + namelen, sdl->sdl_alen);
1428 bcopy(new_name, sdl->sdl_data, namelen);
1429 sdl->sdl_nlen = namelen;
1430 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1431 bzero(sdl->sdl_data, onamelen);
1432 while (namelen != 0)
1433 sdl->sdl_data[--namelen] = 0xff;
1434 /* XXX IFA_UNLOCK(ifa) */
1436 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1438 /* Announce the return of the interface. */
1439 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1443 error = priv_check_cred(cred, PRIV_ROOT, 0);
1446 ifp->if_metric = ifr->ifr_metric;
1447 getmicrotime(&ifp->if_lastchange);
1451 error = priv_check_cred(cred, PRIV_ROOT, 0);
1456 ifnet_serialize_all(ifp);
1457 error = ifp->if_ioctl(ifp, cmd, data, cred);
1458 ifnet_deserialize_all(ifp);
1460 getmicrotime(&ifp->if_lastchange);
1465 u_long oldmtu = ifp->if_mtu;
1467 error = priv_check_cred(cred, PRIV_ROOT, 0);
1470 if (ifp->if_ioctl == NULL)
1471 return (EOPNOTSUPP);
1472 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1474 ifnet_serialize_all(ifp);
1475 error = ifp->if_ioctl(ifp, cmd, data, cred);
1476 ifnet_deserialize_all(ifp);
1478 getmicrotime(&ifp->if_lastchange);
1482 * If the link MTU changed, do network layer specific procedure.
1484 if (ifp->if_mtu != oldmtu) {
1494 error = priv_check_cred(cred, PRIV_ROOT, 0);
1498 /* Don't allow group membership on non-multicast interfaces. */
1499 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1502 /* Don't let users screw up protocols' entries. */
1503 if (ifr->ifr_addr.sa_family != AF_LINK)
1506 if (cmd == SIOCADDMULTI) {
1507 struct ifmultiaddr *ifma;
1508 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1510 error = if_delmulti(ifp, &ifr->ifr_addr);
1513 getmicrotime(&ifp->if_lastchange);
1516 case SIOCSIFPHYADDR:
1517 case SIOCDIFPHYADDR:
1519 case SIOCSIFPHYADDR_IN6:
1521 case SIOCSLIFPHYADDR:
1523 case SIOCSIFGENERIC:
1524 error = priv_check_cred(cred, PRIV_ROOT, 0);
1527 if (ifp->if_ioctl == 0)
1528 return (EOPNOTSUPP);
1529 ifnet_serialize_all(ifp);
1530 error = ifp->if_ioctl(ifp, cmd, data, cred);
1531 ifnet_deserialize_all(ifp);
1533 getmicrotime(&ifp->if_lastchange);
1537 ifs = (struct ifstat *)data;
1538 ifs->ascii[0] = '\0';
1540 case SIOCGIFPSRCADDR:
1541 case SIOCGIFPDSTADDR:
1542 case SIOCGLIFPHYADDR:
1544 case SIOCGIFGENERIC:
1545 if (ifp->if_ioctl == NULL)
1546 return (EOPNOTSUPP);
1547 ifnet_serialize_all(ifp);
1548 error = ifp->if_ioctl(ifp, cmd, data, cred);
1549 ifnet_deserialize_all(ifp);
1553 error = priv_check_cred(cred, PRIV_ROOT, 0);
1556 error = if_setlladdr(ifp,
1557 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1558 EVENTHANDLER_INVOKE(iflladdr_event, ifp);
1562 oif_flags = ifp->if_flags;
1563 if (so->so_proto == 0)
1564 return (EOPNOTSUPP);
1566 error = so_pru_control(so, cmd, data, ifp);
1573 case SIOCSIFDSTADDR:
1575 case SIOCSIFBRDADDR:
1576 case SIOCSIFNETMASK:
1577 #if BYTE_ORDER != BIG_ENDIAN
1578 if (ifr->ifr_addr.sa_family == 0 &&
1579 ifr->ifr_addr.sa_len < 16) {
1580 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1581 ifr->ifr_addr.sa_len = 16;
1584 if (ifr->ifr_addr.sa_len == 0)
1585 ifr->ifr_addr.sa_len = 16;
1593 case OSIOCGIFDSTADDR:
1594 cmd = SIOCGIFDSTADDR;
1597 case OSIOCGIFBRDADDR:
1598 cmd = SIOCGIFBRDADDR;
1601 case OSIOCGIFNETMASK:
1602 cmd = SIOCGIFNETMASK;
1604 error = so_pru_control(so, cmd, data, ifp);
1608 case OSIOCGIFDSTADDR:
1609 case OSIOCGIFBRDADDR:
1610 case OSIOCGIFNETMASK:
1611 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1615 #endif /* COMPAT_43 */
1617 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1619 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1620 if (ifp->if_flags & IFF_UP) {
1634 * Set/clear promiscuous mode on interface ifp based on the truth value
1635 * of pswitch. The calls are reference counted so that only the first
1636 * "on" request actually has an effect, as does the final "off" request.
1637 * Results are undefined if the "off" and "on" requests are not matched.
1640 ifpromisc(struct ifnet *ifp, int pswitch)
1646 oldflags = ifp->if_flags;
1647 if (ifp->if_flags & IFF_PPROMISC) {
1648 /* Do nothing if device is in permanently promiscuous mode */
1649 ifp->if_pcount += pswitch ? 1 : -1;
1654 * If the device is not configured up, we cannot put it in
1657 if ((ifp->if_flags & IFF_UP) == 0)
1659 if (ifp->if_pcount++ != 0)
1661 ifp->if_flags |= IFF_PROMISC;
1662 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1665 if (--ifp->if_pcount > 0)
1667 ifp->if_flags &= ~IFF_PROMISC;
1668 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1671 ifr.ifr_flags = ifp->if_flags;
1672 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1673 ifnet_serialize_all(ifp);
1674 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, NULL);
1675 ifnet_deserialize_all(ifp);
1679 ifp->if_flags = oldflags;
1684 * Return interface configuration
1685 * of system. List may be used
1686 * in later ioctl's (above) to get
1687 * other information.
1690 ifconf(u_long cmd, caddr_t data, struct ucred *cred)
1692 struct ifconf *ifc = (struct ifconf *)data;
1694 struct sockaddr *sa;
1695 struct ifreq ifr, *ifrp;
1696 int space = ifc->ifc_len, error = 0;
1698 ifrp = ifc->ifc_req;
1699 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1700 struct ifaddr_container *ifac;
1703 if (space <= sizeof ifr)
1707 * Zero the stack declared structure first to prevent
1708 * memory disclosure.
1710 bzero(&ifr, sizeof(ifr));
1711 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1712 >= sizeof(ifr.ifr_name)) {
1713 error = ENAMETOOLONG;
1718 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
1719 struct ifaddr *ifa = ifac->ifa;
1721 if (space <= sizeof ifr)
1724 if (cred->cr_prison &&
1725 prison_if(cred, sa))
1729 if (cmd == OSIOCGIFCONF) {
1730 struct osockaddr *osa =
1731 (struct osockaddr *)&ifr.ifr_addr;
1733 osa->sa_family = sa->sa_family;
1734 error = copyout(&ifr, ifrp, sizeof ifr);
1738 if (sa->sa_len <= sizeof(*sa)) {
1740 error = copyout(&ifr, ifrp, sizeof ifr);
1743 if (space < (sizeof ifr) + sa->sa_len -
1746 space -= sa->sa_len - sizeof(*sa);
1747 error = copyout(&ifr, ifrp,
1748 sizeof ifr.ifr_name);
1750 error = copyout(sa, &ifrp->ifr_addr,
1752 ifrp = (struct ifreq *)
1753 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1757 space -= sizeof ifr;
1762 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1763 error = copyout(&ifr, ifrp, sizeof ifr);
1766 space -= sizeof ifr;
1770 ifc->ifc_len -= space;
1775 * Just like if_promisc(), but for all-multicast-reception mode.
1778 if_allmulti(struct ifnet *ifp, int onswitch)
1786 if (ifp->if_amcount++ == 0) {
1787 ifp->if_flags |= IFF_ALLMULTI;
1788 ifr.ifr_flags = ifp->if_flags;
1789 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1790 ifnet_serialize_all(ifp);
1791 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1793 ifnet_deserialize_all(ifp);
1796 if (ifp->if_amcount > 1) {
1799 ifp->if_amcount = 0;
1800 ifp->if_flags &= ~IFF_ALLMULTI;
1801 ifr.ifr_flags = ifp->if_flags;
1802 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1803 ifnet_serialize_all(ifp);
1804 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1806 ifnet_deserialize_all(ifp);
1818 * Add a multicast listenership to the interface in question.
1819 * The link layer provides a routine which converts
1823 struct ifnet *ifp, /* interface to manipulate */
1824 struct sockaddr *sa, /* address to add */
1825 struct ifmultiaddr **retifma)
1827 struct sockaddr *llsa, *dupsa;
1829 struct ifmultiaddr *ifma;
1832 * If the matching multicast address already exists
1833 * then don't add a new one, just add a reference
1835 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1836 if (sa_equal(sa, ifma->ifma_addr)) {
1837 ifma->ifma_refcount++;
1845 * Give the link layer a chance to accept/reject it, and also
1846 * find out which AF_LINK address this maps to, if it isn't one
1849 if (ifp->if_resolvemulti) {
1850 ifnet_serialize_all(ifp);
1851 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1852 ifnet_deserialize_all(ifp);
1859 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1860 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1861 bcopy(sa, dupsa, sa->sa_len);
1863 ifma->ifma_addr = dupsa;
1864 ifma->ifma_lladdr = llsa;
1865 ifma->ifma_ifp = ifp;
1866 ifma->ifma_refcount = 1;
1867 ifma->ifma_protospec = 0;
1868 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1871 * Some network interfaces can scan the address list at
1872 * interrupt time; lock them out.
1875 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1881 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1882 if (sa_equal(ifma->ifma_addr, llsa))
1886 ifma->ifma_refcount++;
1888 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1889 M_IFMADDR, M_WAITOK);
1890 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1891 M_IFMADDR, M_WAITOK);
1892 bcopy(llsa, dupsa, llsa->sa_len);
1893 ifma->ifma_addr = dupsa;
1894 ifma->ifma_ifp = ifp;
1895 ifma->ifma_refcount = 1;
1897 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1902 * We are certain we have added something, so call down to the
1903 * interface to let them know about it.
1906 ifnet_serialize_all(ifp);
1908 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, NULL);
1909 ifnet_deserialize_all(ifp);
1916 * Remove a reference to a multicast address on this interface. Yell
1917 * if the request does not match an existing membership.
1920 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
1922 struct ifmultiaddr *ifma;
1924 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1925 if (sa_equal(sa, ifma->ifma_addr))
1930 if (ifma->ifma_refcount > 1) {
1931 ifma->ifma_refcount--;
1935 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1936 sa = ifma->ifma_lladdr;
1938 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1940 * Make sure the interface driver is notified
1941 * in the case of a link layer mcast group being left.
1943 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) {
1944 ifnet_serialize_all(ifp);
1945 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
1946 ifnet_deserialize_all(ifp);
1949 kfree(ifma->ifma_addr, M_IFMADDR);
1950 kfree(ifma, M_IFMADDR);
1955 * Now look for the link-layer address which corresponds to
1956 * this network address. It had been squirreled away in
1957 * ifma->ifma_lladdr for this purpose (so we don't have
1958 * to call ifp->if_resolvemulti() again), and we saved that
1959 * value in sa above. If some nasty deleted the
1960 * link-layer address out from underneath us, we can deal because
1961 * the address we stored was is not the same as the one which was
1962 * in the record for the link-layer address. (So we don't complain
1965 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1966 if (sa_equal(sa, ifma->ifma_addr))
1971 if (ifma->ifma_refcount > 1) {
1972 ifma->ifma_refcount--;
1977 ifnet_serialize_all(ifp);
1978 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1979 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, NULL);
1980 ifnet_deserialize_all(ifp);
1982 kfree(ifma->ifma_addr, M_IFMADDR);
1983 kfree(sa, M_IFMADDR);
1984 kfree(ifma, M_IFMADDR);
1990 * Delete all multicast group membership for an interface.
1991 * Should be used to quickly flush all multicast filters.
1994 if_delallmulti(struct ifnet *ifp)
1996 struct ifmultiaddr *ifma;
1997 struct ifmultiaddr *next;
1999 TAILQ_FOREACH_MUTABLE(ifma, &ifp->if_multiaddrs, ifma_link, next)
2000 if_delmulti(ifp, ifma->ifma_addr);
2005 * Set the link layer address on an interface.
2007 * At this time we only support certain types of interfaces,
2008 * and we don't allow the length of the address to change.
2011 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
2013 struct sockaddr_dl *sdl;
2016 sdl = IF_LLSOCKADDR(ifp);
2019 if (len != sdl->sdl_alen) /* don't allow length to change */
2021 switch (ifp->if_type) {
2022 case IFT_ETHER: /* these types use struct arpcom */
2025 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
2026 bcopy(lladdr, LLADDR(sdl), len);
2032 * If the interface is already up, we need
2033 * to re-init it in order to reprogram its
2036 ifnet_serialize_all(ifp);
2037 if ((ifp->if_flags & IFF_UP) != 0) {
2038 struct ifaddr_container *ifac;
2040 ifp->if_flags &= ~IFF_UP;
2041 ifr.ifr_flags = ifp->if_flags;
2042 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2043 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2045 ifp->if_flags |= IFF_UP;
2046 ifr.ifr_flags = ifp->if_flags;
2047 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2048 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
2052 * Also send gratuitous ARPs to notify other nodes about
2053 * the address change.
2055 TAILQ_FOREACH(ifac, &ifp->if_addrheads[mycpuid], ifa_link) {
2056 struct ifaddr *ifa = ifac->ifa;
2058 if (ifa->ifa_addr != NULL &&
2059 ifa->ifa_addr->sa_family == AF_INET)
2060 arp_ifinit(ifp, ifa);
2064 ifnet_deserialize_all(ifp);
2068 struct ifmultiaddr *
2069 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
2071 struct ifmultiaddr *ifma;
2073 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2074 if (sa_equal(ifma->ifma_addr, sa))
2081 * This function locates the first real ethernet MAC from a network
2082 * card and loads it into node, returning 0 on success or ENOENT if
2083 * no suitable interfaces were found. It is used by the uuid code to
2084 * generate a unique 6-byte number.
2087 if_getanyethermac(uint16_t *node, int minlen)
2090 struct sockaddr_dl *sdl;
2092 TAILQ_FOREACH(ifp, &ifnet, if_link) {
2093 if (ifp->if_type != IFT_ETHER)
2095 sdl = IF_LLSOCKADDR(ifp);
2096 if (sdl->sdl_alen < minlen)
2098 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node,
2106 * The name argument must be a pointer to storage which will last as
2107 * long as the interface does. For physical devices, the result of
2108 * device_get_name(dev) is a good choice and for pseudo-devices a
2109 * static string works well.
2112 if_initname(struct ifnet *ifp, const char *name, int unit)
2114 ifp->if_dname = name;
2115 ifp->if_dunit = unit;
2116 if (unit != IF_DUNIT_NONE)
2117 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
2119 strlcpy(ifp->if_xname, name, IFNAMSIZ);
2123 if_printf(struct ifnet *ifp, const char *fmt, ...)
2128 retval = kprintf("%s: ", ifp->if_xname);
2129 __va_start(ap, fmt);
2130 retval += kvprintf(fmt, ap);
2136 if_alloc(uint8_t type)
2140 ifp = kmalloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
2142 ifp->if_type = type;
2144 if (if_com_alloc[type] != NULL) {
2145 ifp->if_l2com = if_com_alloc[type](type, ifp);
2146 if (ifp->if_l2com == NULL) {
2147 kfree(ifp, M_IFNET);
2155 if_free(struct ifnet *ifp)
2157 kfree(ifp, M_IFNET);
2161 ifq_set_classic(struct ifaltq *ifq)
2163 ifq->altq_enqueue = ifq_classic_enqueue;
2164 ifq->altq_dequeue = ifq_classic_dequeue;
2165 ifq->altq_request = ifq_classic_request;
2169 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
2170 struct altq_pktattr *pa __unused)
2172 logifq(enqueue, ifq);
2173 if (IF_QFULL(ifq)) {
2183 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op)
2192 logifq(dequeue, ifq);
2196 panic("unsupported ALTQ dequeue op: %d", op);
2198 KKASSERT(mpolled == NULL || mpolled == m);
2203 ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
2210 panic("unsupported ALTQ request: %d", req);
2216 ifq_dispatch(struct ifnet *ifp, struct mbuf *m, struct altq_pktattr *pa)
2218 struct ifaltq *ifq = &ifp->if_snd;
2219 int running = 0, error, start = 0;
2221 ASSERT_IFNET_NOT_SERIALIZED_TX(ifp);
2224 error = ifq_enqueue_locked(ifq, m, pa);
2229 if (!ifq->altq_started) {
2231 * Hold the interlock of ifnet.if_start
2233 ifq->altq_started = 1;
2238 ifp->if_obytes += m->m_pkthdr.len;
2239 if (m->m_flags & M_MCAST)
2243 logifstart(avoid, ifp);
2247 if (ifq_dispatch_schedonly) {
2249 * Always schedule ifnet.if_start on ifnet's CPU,
2250 * short circuit the rest of this function.
2252 logifstart(sched, ifp);
2253 if_start_schedule(ifp);
2258 * Try to do direct ifnet.if_start first, if there is
2259 * contention on ifnet's serializer, ifnet.if_start will
2260 * be scheduled on ifnet's CPU.
2262 if (!ifnet_tryserialize_tx(ifp)) {
2264 * ifnet serializer contention happened,
2265 * ifnet.if_start is scheduled on ifnet's
2266 * CPU, and we keep going.
2268 logifstart(contend_sched, ifp);
2269 if_start_schedule(ifp);
2273 if ((ifp->if_flags & IFF_OACTIVE) == 0) {
2274 logifstart(run, ifp);
2276 if ((ifp->if_flags &
2277 (IFF_OACTIVE | IFF_RUNNING)) == IFF_RUNNING)
2281 ifnet_deserialize_tx(ifp);
2283 if (ifq_dispatch_schednochk || if_start_need_schedule(ifq, running)) {
2285 * More data need to be transmitted, ifnet.if_start is
2286 * scheduled on ifnet's CPU, and we keep going.
2287 * NOTE: ifnet.if_start interlock is not released.
2289 logifstart(sched, ifp);
2290 if_start_schedule(ifp);
2296 ifa_create(int size, int flags)
2301 KASSERT(size >= sizeof(*ifa), ("ifaddr size too small\n"));
2303 ifa = kmalloc(size, M_IFADDR, flags | M_ZERO);
2307 ifa->ifa_containers = kmalloc(ncpus * sizeof(struct ifaddr_container),
2308 M_IFADDR, M_WAITOK | M_ZERO);
2309 ifa->ifa_ncnt = ncpus;
2310 for (i = 0; i < ncpus; ++i) {
2311 struct ifaddr_container *ifac = &ifa->ifa_containers[i];
2313 ifac->ifa_magic = IFA_CONTAINER_MAGIC;
2315 ifac->ifa_refcnt = 1;
2318 kprintf("alloc ifa %p %d\n", ifa, size);
2324 ifac_free(struct ifaddr_container *ifac, int cpu_id)
2326 struct ifaddr *ifa = ifac->ifa;
2328 KKASSERT(ifac->ifa_magic == IFA_CONTAINER_MAGIC);
2329 KKASSERT(ifac->ifa_refcnt == 0);
2330 KASSERT(ifac->ifa_listmask == 0,
2331 ("ifa is still on %#x lists\n", ifac->ifa_listmask));
2333 ifac->ifa_magic = IFA_CONTAINER_DEAD;
2335 #ifdef IFADDR_DEBUG_VERBOSE
2336 kprintf("try free ifa %p cpu_id %d\n", ifac->ifa, cpu_id);
2339 KASSERT(ifa->ifa_ncnt > 0 && ifa->ifa_ncnt <= ncpus,
2340 ("invalid # of ifac, %d\n", ifa->ifa_ncnt));
2341 if (atomic_fetchadd_int(&ifa->ifa_ncnt, -1) == 1) {
2343 kprintf("free ifa %p\n", ifa);
2345 kfree(ifa->ifa_containers, M_IFADDR);
2346 kfree(ifa, M_IFADDR);
2351 ifa_iflink_dispatch(struct netmsg *nmsg)
2353 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
2354 struct ifaddr *ifa = msg->ifa;
2355 struct ifnet *ifp = msg->ifp;
2357 struct ifaddr_container *ifac;
2361 ifac = &ifa->ifa_containers[cpu];
2362 ASSERT_IFAC_VALID(ifac);
2363 KASSERT((ifac->ifa_listmask & IFA_LIST_IFADDRHEAD) == 0,
2364 ("ifaddr is on if_addrheads\n"));
2366 ifac->ifa_listmask |= IFA_LIST_IFADDRHEAD;
2368 TAILQ_INSERT_TAIL(&ifp->if_addrheads[cpu], ifac, ifa_link);
2370 TAILQ_INSERT_HEAD(&ifp->if_addrheads[cpu], ifac, ifa_link);
2374 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
2378 ifa_iflink(struct ifaddr *ifa, struct ifnet *ifp, int tail)
2380 struct netmsg_ifaddr msg;
2382 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport,
2383 0, ifa_iflink_dispatch);
2388 ifa_domsg(&msg.netmsg.nm_lmsg, 0);
2392 ifa_ifunlink_dispatch(struct netmsg *nmsg)
2394 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
2395 struct ifaddr *ifa = msg->ifa;
2396 struct ifnet *ifp = msg->ifp;
2398 struct ifaddr_container *ifac;
2402 ifac = &ifa->ifa_containers[cpu];
2403 ASSERT_IFAC_VALID(ifac);
2404 KASSERT(ifac->ifa_listmask & IFA_LIST_IFADDRHEAD,
2405 ("ifaddr is not on if_addrhead\n"));
2407 TAILQ_REMOVE(&ifp->if_addrheads[cpu], ifac, ifa_link);
2408 ifac->ifa_listmask &= ~IFA_LIST_IFADDRHEAD;
2412 ifa_forwardmsg(&nmsg->nm_lmsg, cpu + 1);
2416 ifa_ifunlink(struct ifaddr *ifa, struct ifnet *ifp)
2418 struct netmsg_ifaddr msg;
2420 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport,
2421 0, ifa_ifunlink_dispatch);
2425 ifa_domsg(&msg.netmsg.nm_lmsg, 0);
2429 ifa_destroy_dispatch(struct netmsg *nmsg)
2431 struct netmsg_ifaddr *msg = (struct netmsg_ifaddr *)nmsg;
2434 ifa_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
2438 ifa_destroy(struct ifaddr *ifa)
2440 struct netmsg_ifaddr msg;
2442 netmsg_init(&msg.netmsg, NULL, &curthread->td_msgport,
2443 0, ifa_destroy_dispatch);
2446 ifa_domsg(&msg.netmsg.nm_lmsg, 0);
2450 ifnet_portfn(int cpu)
2452 return &ifnet_threads[cpu].td_msgport;
2456 ifnet_forwardmsg(struct lwkt_msg *lmsg, int next_cpu)
2458 KKASSERT(next_cpu > mycpuid && next_cpu <= ncpus);
2460 if (next_cpu < ncpus)
2461 lwkt_forwardmsg(ifnet_portfn(next_cpu), lmsg);
2463 lwkt_replymsg(lmsg, 0);
2467 ifnet_domsg(struct lwkt_msg *lmsg, int cpu)
2469 KKASSERT(cpu < ncpus);
2470 return lwkt_domsg(ifnet_portfn(cpu), lmsg, 0);
2474 ifnet_sendmsg(struct lwkt_msg *lmsg, int cpu)
2476 KKASSERT(cpu < ncpus);
2477 lwkt_sendmsg(ifnet_portfn(cpu), lmsg);
2481 ifnetinit(void *dummy __unused)
2485 for (i = 0; i < ncpus; ++i) {
2486 struct thread *thr = &ifnet_threads[i];
2488 lwkt_create(netmsg_service_loop, &ifnet_mpsafe_thread, NULL,
2489 thr, TDF_NETWORK | TDF_MPSAFE, i, "ifnet %d", i);
2490 netmsg_service_port_init(&thr->td_msgport);
2495 ifnet_byindex(unsigned short idx)
2499 return ifindex2ifnet[idx];
2503 ifaddr_byindex(unsigned short idx)
2507 ifp = ifnet_byindex(idx);
2510 return TAILQ_FIRST(&ifp->if_addrheads[mycpuid])->ifa;
2514 if_register_com_alloc(u_char type,
2515 if_com_alloc_t *a, if_com_free_t *f)
2518 KASSERT(if_com_alloc[type] == NULL,
2519 ("if_register_com_alloc: %d already registered", type));
2520 KASSERT(if_com_free[type] == NULL,
2521 ("if_register_com_alloc: %d free already registered", type));
2523 if_com_alloc[type] = a;
2524 if_com_free[type] = f;
2528 if_deregister_com_alloc(u_char type)
2531 KASSERT(if_com_alloc[type] != NULL,
2532 ("if_deregister_com_alloc: %d not registered", type));
2533 KASSERT(if_com_free[type] != NULL,
2534 ("if_deregister_com_alloc: %d free not registered", type));
2535 if_com_alloc[type] = NULL;
2536 if_com_free[type] = NULL;