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 1.61 2008/03/07 11:34:19 sephe Exp $
38 #include "opt_compat.h"
39 #include "opt_inet6.h"
41 #include "opt_polling.h"
43 #include <sys/param.h>
44 #include <sys/malloc.h>
46 #include <sys/systm.h>
48 #include <sys/protosw.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.h>
51 #include <sys/socketops.h>
52 #include <sys/protosw.h>
53 #include <sys/kernel.h>
54 #include <sys/sockio.h>
55 #include <sys/syslog.h>
56 #include <sys/sysctl.h>
57 #include <sys/domain.h>
58 #include <sys/thread.h>
59 #include <sys/thread2.h>
60 #include <sys/serialize.h>
61 #include <sys/msgport2.h>
64 #include <net/if_arp.h>
65 #include <net/if_dl.h>
66 #include <net/if_types.h>
67 #include <net/if_var.h>
68 #include <net/ifq_var.h>
69 #include <net/radix.h>
70 #include <net/route.h>
71 #include <net/if_clone.h>
72 #include <net/netmsg2.h>
74 #include <machine/stdarg.h>
75 #include <machine/smp.h>
77 #if defined(INET) || defined(INET6)
79 #include <netinet/in.h>
80 #include <netinet/in_var.h>
81 #include <netinet/if_ether.h>
83 #include <netinet6/in6_var.h>
84 #include <netinet6/in6_ifattach.h>
88 #if defined(COMPAT_43)
89 #include <emulation/43bsd/43bsd_socket.h>
90 #endif /* COMPAT_43 */
92 struct netmsg_ifaddr
{
100 * Support for non-ALTQ interfaces.
102 static int ifq_classic_enqueue(struct ifaltq
*, struct mbuf
*,
103 struct altq_pktattr
*);
105 ifq_classic_dequeue(struct ifaltq
*, struct mbuf
*, int);
106 static int ifq_classic_request(struct ifaltq
*, int, void *);
109 * System initialization
111 static void if_attachdomain(void *);
112 static void if_attachdomain1(struct ifnet
*);
113 static int ifconf(u_long
, caddr_t
, struct ucred
*);
114 static void ifinit(void *);
115 static void ifaddrinit(void *);
116 static void if_slowtimo(void *);
117 static void link_rtrequest(int, struct rtentry
*, struct rt_addrinfo
*);
118 static int if_rtdel(struct radix_node
*, void *);
122 * XXX: declare here to avoid to include many inet6 related files..
123 * should be more generalized?
125 extern void nd6_setmtu(struct ifnet
*);
128 SYSCTL_NODE(_net
, PF_LINK
, link
, CTLFLAG_RW
, 0, "Link layers");
129 SYSCTL_NODE(_net_link
, 0, generic
, CTLFLAG_RW
, 0, "Generic link-management");
131 SYSINIT(interfaces
, SI_SUB_PROTO_IF
, SI_ORDER_FIRST
, ifinit
, NULL
)
132 /* Must be after netisr_init */
133 SYSINIT(ifaddr
, SI_SUB_PRE_DRIVERS
, SI_ORDER_SECOND
, ifaddrinit
, NULL
)
135 MALLOC_DEFINE(M_IFADDR
, "ifaddr", "interface address");
136 MALLOC_DEFINE(M_IFMADDR
, "ether_multi", "link-level multicast address");
138 int ifqmaxlen
= IFQ_MAXLEN
;
139 struct ifnethead ifnet
= TAILQ_HEAD_INITIALIZER(ifnet
);
141 struct callout if_slowtimo_timer
;
144 struct ifnet
**ifindex2ifnet
= NULL
;
145 static struct thread ifaddr_threads
[MAXCPU
];
148 * Network interface utility routines.
150 * Routines with ifa_ifwith* names take sockaddr *'s as
159 callout_init(&if_slowtimo_timer
);
162 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
163 if (ifp
->if_snd
.ifq_maxlen
== 0) {
164 if_printf(ifp
, "XXX: driver didn't set ifq_maxlen\n");
165 ifp
->if_snd
.ifq_maxlen
= ifqmaxlen
;
174 * Attach an interface to the list of "active" interfaces.
176 * The serializer is optional. If non-NULL access to the interface
180 if_attach(struct ifnet
*ifp
, lwkt_serialize_t serializer
)
182 unsigned socksize
, ifasize
;
183 int namelen
, masklen
;
184 struct sockaddr_dl
*sdl
;
189 static int if_indexlim
= 8;
192 * The serializer can be passed in from the device, allowing the
193 * same serializer to be used for both the interrupt interlock and
194 * the device queue. If not specified, the netif structure will
195 * use an embedded serializer.
197 if (serializer
== NULL
) {
198 serializer
= &ifp
->if_default_serializer
;
199 lwkt_serialize_init(serializer
);
201 ifp
->if_serializer
= serializer
;
203 #ifdef DEVICE_POLLING
204 /* Device is not in polling mode by default */
205 ifp
->if_poll_cpuid
= -1;
208 TAILQ_INSERT_TAIL(&ifnet
, ifp
, if_link
);
209 ifp
->if_index
= ++if_index
;
213 * The old code would work if the interface passed a pre-existing
214 * chain of ifaddrs to this code. We don't trust our callers to
215 * properly initialize the tailq, however, so we no longer allow
216 * this unlikely case.
218 ifp
->if_addrheads
= kmalloc(ncpus
* sizeof(struct ifaddrhead
),
219 M_IFADDR
, M_WAITOK
| M_ZERO
);
220 for (i
= 0; i
< ncpus
; ++i
)
221 TAILQ_INIT(&ifp
->if_addrheads
[i
]);
223 TAILQ_INIT(&ifp
->if_prefixhead
);
224 LIST_INIT(&ifp
->if_multiaddrs
);
225 getmicrotime(&ifp
->if_lastchange
);
226 if (ifindex2ifnet
== NULL
|| if_index
>= if_indexlim
) {
232 /* grow ifindex2ifnet */
233 n
= if_indexlim
* sizeof(*q
);
234 q
= kmalloc(n
, M_IFADDR
, M_WAITOK
| M_ZERO
);
236 bcopy(ifindex2ifnet
, q
, n
/2);
237 kfree(ifindex2ifnet
, M_IFADDR
);
242 ifindex2ifnet
[if_index
] = ifp
;
245 * create a Link Level name for this device
247 namelen
= strlen(ifp
->if_xname
);
248 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
249 masklen
= _offsetof(struct sockaddr_dl
, sdl_data
[0]) + namelen
;
250 socksize
= masklen
+ ifp
->if_addrlen
;
251 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
252 if (socksize
< sizeof(*sdl
))
253 socksize
= sizeof(*sdl
);
254 socksize
= ROUNDUP(socksize
);
255 ifasize
= sizeof(struct ifaddr
) + 2 * socksize
;
256 ifa
= ifa_create(ifasize
, M_WAITOK
);
257 sdl
= (struct sockaddr_dl
*)(ifa
+ 1);
258 sdl
->sdl_len
= socksize
;
259 sdl
->sdl_family
= AF_LINK
;
260 bcopy(ifp
->if_xname
, sdl
->sdl_data
, namelen
);
261 sdl
->sdl_nlen
= namelen
;
262 sdl
->sdl_index
= ifp
->if_index
;
263 sdl
->sdl_type
= ifp
->if_type
;
264 ifp
->if_lladdr
= ifa
;
266 ifa
->ifa_rtrequest
= link_rtrequest
;
267 ifa
->ifa_addr
= (struct sockaddr
*)sdl
;
268 sdl
= (struct sockaddr_dl
*)(socksize
+ (caddr_t
)sdl
);
269 ifa
->ifa_netmask
= (struct sockaddr
*)sdl
;
270 sdl
->sdl_len
= masklen
;
272 sdl
->sdl_data
[--namelen
] = 0xff;
273 ifa_iflink(ifa
, ifp
, 0 /* Insert head */);
275 EVENTHANDLER_INVOKE(ifnet_attach_event
, ifp
);
279 ifq
->altq_disc
= NULL
;
280 ifq
->altq_flags
&= ALTQF_CANTCHANGE
;
281 ifq
->altq_tbr
= NULL
;
283 ifq_set_classic(ifq
);
285 if (!SLIST_EMPTY(&domains
))
286 if_attachdomain1(ifp
);
288 /* Announce the interface. */
289 rt_ifannouncemsg(ifp
, IFAN_ARRIVAL
);
293 if_attachdomain(void *dummy
)
298 TAILQ_FOREACH(ifp
, &ifnet
, if_list
)
299 if_attachdomain1(ifp
);
302 SYSINIT(domainifattach
, SI_SUB_PROTO_IFATTACHDOMAIN
, SI_ORDER_FIRST
,
303 if_attachdomain
, NULL
);
306 if_attachdomain1(struct ifnet
*ifp
)
312 /* address family dependent data region */
313 bzero(ifp
->if_afdata
, sizeof(ifp
->if_afdata
));
314 SLIST_FOREACH(dp
, &domains
, dom_next
)
315 if (dp
->dom_ifattach
)
316 ifp
->if_afdata
[dp
->dom_family
] =
317 (*dp
->dom_ifattach
)(ifp
);
322 * Purge all addresses whose type is _not_ AF_LINK
325 if_purgeaddrs_nolink(struct ifnet
*ifp
)
327 struct ifaddr_container
*ifac
, *next
;
329 TAILQ_FOREACH_MUTABLE(ifac
, &ifp
->if_addrheads
[mycpuid
],
331 struct ifaddr
*ifa
= ifac
->ifa
;
333 /* Leave link ifaddr as it is */
334 if (ifa
->ifa_addr
->sa_family
== AF_LINK
)
337 /* XXX: Ugly!! ad hoc just for INET */
338 if (ifa
->ifa_addr
&& ifa
->ifa_addr
->sa_family
== AF_INET
) {
339 struct ifaliasreq ifr
;
340 #ifdef IFADDR_DEBUG_VERBOSE
343 kprintf("purge in4 addr %p: ", ifa
);
344 for (i
= 0; i
< ncpus
; ++i
)
345 kprintf("%d ", ifa
->ifa_containers
[i
].ifa_refcnt
);
349 bzero(&ifr
, sizeof ifr
);
350 ifr
.ifra_addr
= *ifa
->ifa_addr
;
351 if (ifa
->ifa_dstaddr
)
352 ifr
.ifra_broadaddr
= *ifa
->ifa_dstaddr
;
353 if (in_control(NULL
, SIOCDIFADDR
, (caddr_t
)&ifr
, ifp
,
359 if (ifa
->ifa_addr
&& ifa
->ifa_addr
->sa_family
== AF_INET6
) {
360 #ifdef IFADDR_DEBUG_VERBOSE
363 kprintf("purge in6 addr %p: ", ifa
);
364 for (i
= 0; i
< ncpus
; ++i
)
365 kprintf("%d ", ifa
->ifa_containers
[i
].ifa_refcnt
);
370 /* ifp_addrhead is already updated */
374 ifa_ifunlink(ifa
, ifp
);
380 * Detach an interface, removing it from the
381 * list of "active" interfaces.
384 if_detach(struct ifnet
*ifp
)
386 struct radix_node_head
*rnh
;
391 EVENTHANDLER_INVOKE(ifnet_detach_event
, ifp
);
394 * Remove routes and flush queues.
397 #ifdef DEVICE_POLLING
398 if (ifp
->if_flags
& IFF_POLLING
)
399 ether_poll_deregister(ifp
);
403 if (ifq_is_enabled(&ifp
->if_snd
))
404 altq_disable(&ifp
->if_snd
);
405 if (ifq_is_attached(&ifp
->if_snd
))
406 altq_detach(&ifp
->if_snd
);
409 * Clean up all addresses.
411 ifp
->if_lladdr
= NULL
;
413 if_purgeaddrs_nolink(ifp
);
414 if (!TAILQ_EMPTY(&ifp
->if_addrheads
[mycpuid
])) {
417 ifa
= TAILQ_FIRST(&ifp
->if_addrheads
[mycpuid
])->ifa
;
418 KASSERT(ifa
->ifa_addr
->sa_family
== AF_LINK
,
419 ("non-link ifaddr is left on if_addrhead"));
421 ifa_ifunlink(ifa
, ifp
);
423 KASSERT(TAILQ_EMPTY(&ifp
->if_addrheads
[mycpuid
]),
424 ("there are still ifaddrs left on if_addrhead"));
429 * Remove all IPv4 kernel structures related to ifp.
436 * Remove all IPv6 kernel structs related to ifp. This should be done
437 * before removing routing entries below, since IPv6 interface direct
438 * routes are expected to be removed by the IPv6-specific kernel API.
439 * Otherwise, the kernel will detect some inconsistency and bark it.
445 * Delete all remaining routes using this interface
446 * Unfortuneatly the only way to do this is to slog through
447 * the entire routing table looking for routes which point
448 * to this interface...oh well...
451 for (cpu
= 0; cpu
< ncpus2
; cpu
++) {
452 lwkt_migratecpu(cpu
);
453 for (i
= 1; i
<= AF_MAX
; i
++) {
454 if ((rnh
= rt_tables
[cpu
][i
]) == NULL
)
456 rnh
->rnh_walktree(rnh
, if_rtdel
, ifp
);
459 lwkt_migratecpu(origcpu
);
461 /* Announce that the interface is gone. */
462 rt_ifannouncemsg(ifp
, IFAN_DEPARTURE
);
464 SLIST_FOREACH(dp
, &domains
, dom_next
)
465 if (dp
->dom_ifdetach
&& ifp
->if_afdata
[dp
->dom_family
])
466 (*dp
->dom_ifdetach
)(ifp
,
467 ifp
->if_afdata
[dp
->dom_family
]);
470 * Remove interface from ifindex2ifp[] and maybe decrement if_index.
472 ifindex2ifnet
[ifp
->if_index
] = NULL
;
473 while (if_index
> 0 && ifindex2ifnet
[if_index
] == NULL
)
476 TAILQ_REMOVE(&ifnet
, ifp
, if_link
);
477 kfree(ifp
->if_addrheads
, M_IFADDR
);
482 * Delete Routes for a Network Interface
484 * Called for each routing entry via the rnh->rnh_walktree() call above
485 * to delete all route entries referencing a detaching network interface.
488 * rn pointer to node in the routing table
489 * arg argument passed to rnh->rnh_walktree() - detaching interface
493 * errno failed - reason indicated
497 if_rtdel(struct radix_node
*rn
, void *arg
)
499 struct rtentry
*rt
= (struct rtentry
*)rn
;
500 struct ifnet
*ifp
= arg
;
503 if (rt
->rt_ifp
== ifp
) {
506 * Protect (sorta) against walktree recursion problems
509 if (!(rt
->rt_flags
& RTF_UP
))
512 err
= rtrequest(RTM_DELETE
, rt_key(rt
), rt
->rt_gateway
,
513 rt_mask(rt
), rt
->rt_flags
,
514 (struct rtentry
**) NULL
);
516 log(LOG_WARNING
, "if_rtdel: error %d\n", err
);
524 * Locate an interface based on a complete address.
527 ifa_ifwithaddr(struct sockaddr
*addr
)
531 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
532 struct ifaddr_container
*ifac
;
534 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
535 struct ifaddr
*ifa
= ifac
->ifa
;
537 if (ifa
->ifa_addr
->sa_family
!= addr
->sa_family
)
539 if (sa_equal(addr
, ifa
->ifa_addr
))
541 if ((ifp
->if_flags
& IFF_BROADCAST
) &&
542 ifa
->ifa_broadaddr
&&
543 /* IPv6 doesn't have broadcast */
544 ifa
->ifa_broadaddr
->sa_len
!= 0 &&
545 sa_equal(ifa
->ifa_broadaddr
, addr
))
552 * Locate the point to point interface with a given destination address.
555 ifa_ifwithdstaddr(struct sockaddr
*addr
)
559 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
560 struct ifaddr_container
*ifac
;
562 if (!(ifp
->if_flags
& IFF_POINTOPOINT
))
565 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
566 struct ifaddr
*ifa
= ifac
->ifa
;
568 if (ifa
->ifa_addr
->sa_family
!= addr
->sa_family
)
570 if (ifa
->ifa_dstaddr
&&
571 sa_equal(addr
, ifa
->ifa_dstaddr
))
579 * Find an interface on a specific network. If many, choice
580 * is most specific found.
583 ifa_ifwithnet(struct sockaddr
*addr
)
586 struct ifaddr
*ifa_maybe
= NULL
;
587 u_int af
= addr
->sa_family
;
588 char *addr_data
= addr
->sa_data
, *cplim
;
591 * AF_LINK addresses can be looked up directly by their index number,
592 * so do that if we can.
595 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*)addr
;
597 if (sdl
->sdl_index
&& sdl
->sdl_index
<= if_index
)
598 return (ifindex2ifnet
[sdl
->sdl_index
]->if_lladdr
);
602 * Scan though each interface, looking for ones that have
603 * addresses in this address family.
605 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
606 struct ifaddr_container
*ifac
;
608 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
609 struct ifaddr
*ifa
= ifac
->ifa
;
610 char *cp
, *cp2
, *cp3
;
612 if (ifa
->ifa_addr
->sa_family
!= af
)
614 if (af
== AF_INET
&& ifp
->if_flags
& IFF_POINTOPOINT
) {
616 * This is a bit broken as it doesn't
617 * take into account that the remote end may
618 * be a single node in the network we are
620 * The trouble is that we don't know the
621 * netmask for the remote end.
623 if (ifa
->ifa_dstaddr
!= NULL
&&
624 sa_equal(addr
, ifa
->ifa_dstaddr
))
628 * if we have a special address handler,
629 * then use it instead of the generic one.
631 if (ifa
->ifa_claim_addr
) {
632 if ((*ifa
->ifa_claim_addr
)(ifa
, addr
)) {
640 * Scan all the bits in the ifa's address.
641 * If a bit dissagrees with what we are
642 * looking for, mask it with the netmask
643 * to see if it really matters.
646 if (ifa
->ifa_netmask
== 0)
649 cp2
= ifa
->ifa_addr
->sa_data
;
650 cp3
= ifa
->ifa_netmask
->sa_data
;
651 cplim
= ifa
->ifa_netmask
->sa_len
+
652 (char *)ifa
->ifa_netmask
;
654 if ((*cp
++ ^ *cp2
++) & *cp3
++)
655 goto next
; /* next address! */
657 * If the netmask of what we just found
658 * is more specific than what we had before
659 * (if we had one) then remember the new one
660 * before continuing to search
661 * for an even better one.
663 if (ifa_maybe
== 0 ||
664 rn_refines((char *)ifa
->ifa_netmask
,
665 (char *)ifa_maybe
->ifa_netmask
))
674 * Find an interface address specific to an interface best matching
678 ifaof_ifpforaddr(struct sockaddr
*addr
, struct ifnet
*ifp
)
680 struct ifaddr_container
*ifac
;
681 char *cp
, *cp2
, *cp3
;
683 struct ifaddr
*ifa_maybe
= 0;
684 u_int af
= addr
->sa_family
;
688 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
689 struct ifaddr
*ifa
= ifac
->ifa
;
691 if (ifa
->ifa_addr
->sa_family
!= af
)
695 if (ifa
->ifa_netmask
== NULL
) {
696 if (sa_equal(addr
, ifa
->ifa_addr
) ||
697 (ifa
->ifa_dstaddr
!= NULL
&&
698 sa_equal(addr
, ifa
->ifa_dstaddr
)))
702 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
703 if (sa_equal(addr
, ifa
->ifa_dstaddr
))
707 cp2
= ifa
->ifa_addr
->sa_data
;
708 cp3
= ifa
->ifa_netmask
->sa_data
;
709 cplim
= ifa
->ifa_netmask
->sa_len
+ (char *)ifa
->ifa_netmask
;
710 for (; cp3
< cplim
; cp3
++)
711 if ((*cp
++ ^ *cp2
++) & *cp3
)
721 * Default action when installing a route with a Link Level gateway.
722 * Lookup an appropriate real ifa to point to.
723 * This should be moved to /sys/net/link.c eventually.
726 link_rtrequest(int cmd
, struct rtentry
*rt
, struct rt_addrinfo
*info
)
729 struct sockaddr
*dst
;
732 if (cmd
!= RTM_ADD
|| (ifa
= rt
->rt_ifa
) == NULL
||
733 (ifp
= ifa
->ifa_ifp
) == NULL
|| (dst
= rt_key(rt
)) == NULL
)
735 ifa
= ifaof_ifpforaddr(dst
, ifp
);
740 if (ifa
->ifa_rtrequest
&& ifa
->ifa_rtrequest
!= link_rtrequest
)
741 ifa
->ifa_rtrequest(cmd
, rt
, info
);
746 * Mark an interface down and notify protocols of
748 * NOTE: must be called at splnet or eqivalent.
751 if_unroute(struct ifnet
*ifp
, int flag
, int fam
)
753 struct ifaddr_container
*ifac
;
755 ifp
->if_flags
&= ~flag
;
756 getmicrotime(&ifp
->if_lastchange
);
757 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
758 struct ifaddr
*ifa
= ifac
->ifa
;
760 if (fam
== PF_UNSPEC
|| (fam
== ifa
->ifa_addr
->sa_family
))
761 pfctlinput(PRC_IFDOWN
, ifa
->ifa_addr
);
763 ifq_purge(&ifp
->if_snd
);
768 * Mark an interface up and notify protocols of
770 * NOTE: must be called at splnet or eqivalent.
773 if_route(struct ifnet
*ifp
, int flag
, int fam
)
775 struct ifaddr_container
*ifac
;
777 ifp
->if_flags
|= flag
;
778 getmicrotime(&ifp
->if_lastchange
);
779 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
780 struct ifaddr
*ifa
= ifac
->ifa
;
782 if (fam
== PF_UNSPEC
|| (fam
== ifa
->ifa_addr
->sa_family
))
783 pfctlinput(PRC_IFUP
, ifa
->ifa_addr
);
792 * Mark an interface down and notify protocols of the transition. An
793 * interface going down is also considered to be a synchronizing event.
794 * We must ensure that all packet processing related to the interface
795 * has completed before we return so e.g. the caller can free the ifnet
796 * structure that the mbufs may be referencing.
798 * NOTE: must be called at splnet or eqivalent.
801 if_down(struct ifnet
*ifp
)
803 if_unroute(ifp
, IFF_UP
, AF_UNSPEC
);
804 netmsg_service_sync();
808 * Mark an interface up and notify protocols of
810 * NOTE: must be called at splnet or eqivalent.
813 if_up(struct ifnet
*ifp
)
816 if_route(ifp
, IFF_UP
, AF_UNSPEC
);
820 * Process a link state change.
821 * NOTE: must be called at splsoftnet or equivalent.
824 if_link_state_change(struct ifnet
*ifp
)
830 * Handle interface watchdog timer routines. Called
831 * from softclock, we decrement timers (if set) and
832 * call the appropriate interface routine on expiration.
835 if_slowtimo(void *arg
)
841 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
842 if (ifp
->if_timer
== 0 || --ifp
->if_timer
)
844 if (ifp
->if_watchdog
) {
845 if (lwkt_serialize_try(ifp
->if_serializer
)) {
846 (*ifp
->if_watchdog
)(ifp
);
847 lwkt_serialize_exit(ifp
->if_serializer
);
849 /* try again next timeout */
857 callout_reset(&if_slowtimo_timer
, hz
/ IFNET_SLOWHZ
, if_slowtimo
, NULL
);
861 * Map interface name to
862 * interface structure pointer.
865 ifunit(const char *name
)
870 * Search all the interfaces for this name/number
873 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
874 if (strncmp(ifp
->if_xname
, name
, IFNAMSIZ
) == 0)
882 * Map interface name in a sockaddr_dl to
883 * interface structure pointer.
886 if_withname(struct sockaddr
*sa
)
888 char ifname
[IFNAMSIZ
+1];
889 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*)sa
;
891 if ( (sa
->sa_family
!= AF_LINK
) || (sdl
->sdl_nlen
== 0) ||
892 (sdl
->sdl_nlen
> IFNAMSIZ
) )
896 * ifunit wants a null-terminated name. It may not be null-terminated
897 * in the sockaddr. We don't want to change the caller's sockaddr,
898 * and there might not be room to put the trailing null anyway, so we
899 * make a local copy that we know we can null terminate safely.
902 bcopy(sdl
->sdl_data
, ifname
, sdl
->sdl_nlen
);
903 ifname
[sdl
->sdl_nlen
] = '\0';
904 return ifunit(ifname
);
912 ifioctl(struct socket
*so
, u_long cmd
, caddr_t data
, struct ucred
*cred
)
920 size_t namelen
, onamelen
;
921 char new_name
[IFNAMSIZ
];
923 struct sockaddr_dl
*sdl
;
929 return (ifconf(cmd
, data
, cred
));
931 ifr
= (struct ifreq
*)data
;
936 if ((error
= suser_cred(cred
, 0)) != 0)
938 return ((cmd
== SIOCIFCREATE
) ?
939 if_clone_create(ifr
->ifr_name
, sizeof(ifr
->ifr_name
)) :
940 if_clone_destroy(ifr
->ifr_name
));
943 return (if_clone_list((struct if_clonereq
*)data
));
946 ifp
= ifunit(ifr
->ifr_name
);
952 ifr
->ifr_flags
= ifp
->if_flags
;
953 ifr
->ifr_flagshigh
= ifp
->if_flags
>> 16;
957 ifr
->ifr_reqcap
= ifp
->if_capabilities
;
958 ifr
->ifr_curcap
= ifp
->if_capenable
;
962 ifr
->ifr_metric
= ifp
->if_metric
;
966 ifr
->ifr_mtu
= ifp
->if_mtu
;
970 ifr
->ifr_phys
= ifp
->if_physical
;
974 #ifdef DEVICE_POLLING
975 ifr
->ifr_pollcpu
= ifp
->if_poll_cpuid
;
977 ifr
->ifr_pollcpu
= -1;
982 #ifdef DEVICE_POLLING
983 if ((ifp
->if_flags
& IFF_POLLING
) == 0)
984 ether_pollcpu_register(ifp
, ifr
->ifr_pollcpu
);
989 error
= suser_cred(cred
, 0);
992 new_flags
= (ifr
->ifr_flags
& 0xffff) |
993 (ifr
->ifr_flagshigh
<< 16);
994 if (ifp
->if_flags
& IFF_SMART
) {
995 /* Smart drivers twiddle their own routes */
996 } else if (ifp
->if_flags
& IFF_UP
&&
997 (new_flags
& IFF_UP
) == 0) {
1001 } else if (new_flags
& IFF_UP
&&
1002 (ifp
->if_flags
& IFF_UP
) == 0) {
1008 #ifdef DEVICE_POLLING
1009 if ((new_flags
^ ifp
->if_flags
) & IFF_POLLING
) {
1010 if (new_flags
& IFF_POLLING
) {
1011 ether_poll_register(ifp
);
1013 ether_poll_deregister(ifp
);
1018 ifp
->if_flags
= (ifp
->if_flags
& IFF_CANTCHANGE
) |
1019 (new_flags
&~ IFF_CANTCHANGE
);
1020 if (new_flags
& IFF_PPROMISC
) {
1021 /* Permanently promiscuous mode requested */
1022 ifp
->if_flags
|= IFF_PROMISC
;
1023 } else if (ifp
->if_pcount
== 0) {
1024 ifp
->if_flags
&= ~IFF_PROMISC
;
1026 if (ifp
->if_ioctl
) {
1027 lwkt_serialize_enter(ifp
->if_serializer
);
1028 ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1029 lwkt_serialize_exit(ifp
->if_serializer
);
1031 getmicrotime(&ifp
->if_lastchange
);
1035 error
= suser_cred(cred
, 0);
1038 if (ifr
->ifr_reqcap
& ~ifp
->if_capabilities
)
1040 lwkt_serialize_enter(ifp
->if_serializer
);
1041 ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1042 lwkt_serialize_exit(ifp
->if_serializer
);
1046 error
= suser_cred(cred
, 0);
1049 error
= copyinstr(ifr
->ifr_data
, new_name
, IFNAMSIZ
, NULL
);
1052 if (new_name
[0] == '\0')
1054 if (ifunit(new_name
) != NULL
)
1057 EVENTHANDLER_INVOKE(ifnet_detach_event
, ifp
);
1059 /* Announce the departure of the interface. */
1060 rt_ifannouncemsg(ifp
, IFAN_DEPARTURE
);
1062 strlcpy(ifp
->if_xname
, new_name
, sizeof(ifp
->if_xname
));
1063 ifa
= TAILQ_FIRST(&ifp
->if_addrheads
[mycpuid
])->ifa
;
1064 /* XXX IFA_LOCK(ifa); */
1065 sdl
= (struct sockaddr_dl
*)ifa
->ifa_addr
;
1066 namelen
= strlen(new_name
);
1067 onamelen
= sdl
->sdl_nlen
;
1069 * Move the address if needed. This is safe because we
1070 * allocate space for a name of length IFNAMSIZ when we
1071 * create this in if_attach().
1073 if (namelen
!= onamelen
) {
1074 bcopy(sdl
->sdl_data
+ onamelen
,
1075 sdl
->sdl_data
+ namelen
, sdl
->sdl_alen
);
1077 bcopy(new_name
, sdl
->sdl_data
, namelen
);
1078 sdl
->sdl_nlen
= namelen
;
1079 sdl
= (struct sockaddr_dl
*)ifa
->ifa_netmask
;
1080 bzero(sdl
->sdl_data
, onamelen
);
1081 while (namelen
!= 0)
1082 sdl
->sdl_data
[--namelen
] = 0xff;
1083 /* XXX IFA_UNLOCK(ifa) */
1085 EVENTHANDLER_INVOKE(ifnet_attach_event
, ifp
);
1087 /* Announce the return of the interface. */
1088 rt_ifannouncemsg(ifp
, IFAN_ARRIVAL
);
1092 error
= suser_cred(cred
, 0);
1095 ifp
->if_metric
= ifr
->ifr_metric
;
1096 getmicrotime(&ifp
->if_lastchange
);
1100 error
= suser_cred(cred
, 0);
1105 lwkt_serialize_enter(ifp
->if_serializer
);
1106 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1107 lwkt_serialize_exit(ifp
->if_serializer
);
1109 getmicrotime(&ifp
->if_lastchange
);
1114 u_long oldmtu
= ifp
->if_mtu
;
1116 error
= suser_cred(cred
, 0);
1119 if (ifp
->if_ioctl
== NULL
)
1120 return (EOPNOTSUPP
);
1121 if (ifr
->ifr_mtu
< IF_MINMTU
|| ifr
->ifr_mtu
> IF_MAXMTU
)
1123 lwkt_serialize_enter(ifp
->if_serializer
);
1124 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1125 lwkt_serialize_exit(ifp
->if_serializer
);
1127 getmicrotime(&ifp
->if_lastchange
);
1131 * If the link MTU changed, do network layer specific procedure.
1133 if (ifp
->if_mtu
!= oldmtu
) {
1143 error
= suser_cred(cred
, 0);
1147 /* Don't allow group membership on non-multicast interfaces. */
1148 if ((ifp
->if_flags
& IFF_MULTICAST
) == 0)
1151 /* Don't let users screw up protocols' entries. */
1152 if (ifr
->ifr_addr
.sa_family
!= AF_LINK
)
1155 if (cmd
== SIOCADDMULTI
) {
1156 struct ifmultiaddr
*ifma
;
1157 error
= if_addmulti(ifp
, &ifr
->ifr_addr
, &ifma
);
1159 error
= if_delmulti(ifp
, &ifr
->ifr_addr
);
1162 getmicrotime(&ifp
->if_lastchange
);
1165 case SIOCSIFPHYADDR
:
1166 case SIOCDIFPHYADDR
:
1168 case SIOCSIFPHYADDR_IN6
:
1170 case SIOCSLIFPHYADDR
:
1172 case SIOCSIFGENERIC
:
1173 error
= suser_cred(cred
, 0);
1176 if (ifp
->if_ioctl
== 0)
1177 return (EOPNOTSUPP
);
1178 lwkt_serialize_enter(ifp
->if_serializer
);
1179 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1180 lwkt_serialize_exit(ifp
->if_serializer
);
1182 getmicrotime(&ifp
->if_lastchange
);
1186 ifs
= (struct ifstat
*)data
;
1187 ifs
->ascii
[0] = '\0';
1189 case SIOCGIFPSRCADDR
:
1190 case SIOCGIFPDSTADDR
:
1191 case SIOCGLIFPHYADDR
:
1193 case SIOCGIFGENERIC
:
1194 if (ifp
->if_ioctl
== NULL
)
1195 return (EOPNOTSUPP
);
1196 lwkt_serialize_enter(ifp
->if_serializer
);
1197 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1198 lwkt_serialize_exit(ifp
->if_serializer
);
1202 error
= suser_cred(cred
, 0);
1205 return if_setlladdr(ifp
,
1206 ifr
->ifr_addr
.sa_data
, ifr
->ifr_addr
.sa_len
);
1209 oif_flags
= ifp
->if_flags
;
1210 if (so
->so_proto
== 0)
1211 return (EOPNOTSUPP
);
1213 error
= so_pru_control(so
, cmd
, data
, ifp
);
1220 case SIOCSIFDSTADDR
:
1222 case SIOCSIFBRDADDR
:
1223 case SIOCSIFNETMASK
:
1224 #if BYTE_ORDER != BIG_ENDIAN
1225 if (ifr
->ifr_addr
.sa_family
== 0 &&
1226 ifr
->ifr_addr
.sa_len
< 16) {
1227 ifr
->ifr_addr
.sa_family
= ifr
->ifr_addr
.sa_len
;
1228 ifr
->ifr_addr
.sa_len
= 16;
1231 if (ifr
->ifr_addr
.sa_len
== 0)
1232 ifr
->ifr_addr
.sa_len
= 16;
1240 case OSIOCGIFDSTADDR
:
1241 cmd
= SIOCGIFDSTADDR
;
1244 case OSIOCGIFBRDADDR
:
1245 cmd
= SIOCGIFBRDADDR
;
1248 case OSIOCGIFNETMASK
:
1249 cmd
= SIOCGIFNETMASK
;
1251 error
= so_pru_control(so
, cmd
, data
, ifp
);
1255 case OSIOCGIFDSTADDR
:
1256 case OSIOCGIFBRDADDR
:
1257 case OSIOCGIFNETMASK
:
1258 *(u_short
*)&ifr
->ifr_addr
= ifr
->ifr_addr
.sa_family
;
1262 #endif /* COMPAT_43 */
1264 if ((oif_flags
^ ifp
->if_flags
) & IFF_UP
) {
1266 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1267 if (ifp
->if_flags
& IFF_UP
) {
1281 * Set/clear promiscuous mode on interface ifp based on the truth value
1282 * of pswitch. The calls are reference counted so that only the first
1283 * "on" request actually has an effect, as does the final "off" request.
1284 * Results are undefined if the "off" and "on" requests are not matched.
1287 ifpromisc(struct ifnet
*ifp
, int pswitch
)
1293 oldflags
= ifp
->if_flags
;
1294 if (ifp
->if_flags
& IFF_PPROMISC
) {
1295 /* Do nothing if device is in permanently promiscuous mode */
1296 ifp
->if_pcount
+= pswitch
? 1 : -1;
1301 * If the device is not configured up, we cannot put it in
1304 if ((ifp
->if_flags
& IFF_UP
) == 0)
1306 if (ifp
->if_pcount
++ != 0)
1308 ifp
->if_flags
|= IFF_PROMISC
;
1309 log(LOG_INFO
, "%s: promiscuous mode enabled\n",
1312 if (--ifp
->if_pcount
> 0)
1314 ifp
->if_flags
&= ~IFF_PROMISC
;
1315 log(LOG_INFO
, "%s: promiscuous mode disabled\n",
1318 ifr
.ifr_flags
= ifp
->if_flags
;
1319 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1320 lwkt_serialize_enter(ifp
->if_serializer
);
1321 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1322 (struct ucred
*)NULL
);
1323 lwkt_serialize_exit(ifp
->if_serializer
);
1327 ifp
->if_flags
= oldflags
;
1332 * Return interface configuration
1333 * of system. List may be used
1334 * in later ioctl's (above) to get
1335 * other information.
1338 ifconf(u_long cmd
, caddr_t data
, struct ucred
*cred
)
1340 struct ifconf
*ifc
= (struct ifconf
*)data
;
1342 struct sockaddr
*sa
;
1343 struct ifreq ifr
, *ifrp
;
1344 int space
= ifc
->ifc_len
, error
= 0;
1346 ifrp
= ifc
->ifc_req
;
1347 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
1348 struct ifaddr_container
*ifac
;
1351 if (space
<= sizeof ifr
)
1355 * Zero the stack declared structure first to prevent
1356 * memory disclosure.
1358 bzero(&ifr
, sizeof(ifr
));
1359 if (strlcpy(ifr
.ifr_name
, ifp
->if_xname
, sizeof(ifr
.ifr_name
))
1360 >= sizeof(ifr
.ifr_name
)) {
1361 error
= ENAMETOOLONG
;
1366 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1367 struct ifaddr
*ifa
= ifac
->ifa
;
1369 if (space
<= sizeof ifr
)
1372 if (cred
->cr_prison
&&
1373 prison_if(cred
, sa
))
1377 if (cmd
== OSIOCGIFCONF
) {
1378 struct osockaddr
*osa
=
1379 (struct osockaddr
*)&ifr
.ifr_addr
;
1381 osa
->sa_family
= sa
->sa_family
;
1382 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1386 if (sa
->sa_len
<= sizeof(*sa
)) {
1388 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1391 if (space
< (sizeof ifr
) + sa
->sa_len
-
1394 space
-= sa
->sa_len
- sizeof(*sa
);
1395 error
= copyout(&ifr
, ifrp
,
1396 sizeof ifr
.ifr_name
);
1398 error
= copyout(sa
, &ifrp
->ifr_addr
,
1400 ifrp
= (struct ifreq
*)
1401 (sa
->sa_len
+ (caddr_t
)&ifrp
->ifr_addr
);
1405 space
-= sizeof ifr
;
1410 bzero(&ifr
.ifr_addr
, sizeof ifr
.ifr_addr
);
1411 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1414 space
-= sizeof ifr
;
1418 ifc
->ifc_len
-= space
;
1423 * Just like if_promisc(), but for all-multicast-reception mode.
1426 if_allmulti(struct ifnet
*ifp
, int onswitch
)
1434 if (ifp
->if_amcount
++ == 0) {
1435 ifp
->if_flags
|= IFF_ALLMULTI
;
1436 ifr
.ifr_flags
= ifp
->if_flags
;
1437 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1438 lwkt_serialize_enter(ifp
->if_serializer
);
1439 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1440 (struct ucred
*)NULL
);
1441 lwkt_serialize_exit(ifp
->if_serializer
);
1444 if (ifp
->if_amcount
> 1) {
1447 ifp
->if_amcount
= 0;
1448 ifp
->if_flags
&= ~IFF_ALLMULTI
;
1449 ifr
.ifr_flags
= ifp
->if_flags
;
1450 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1451 lwkt_serialize_enter(ifp
->if_serializer
);
1452 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1453 (struct ucred
*)NULL
);
1454 lwkt_serialize_exit(ifp
->if_serializer
);
1466 * Add a multicast listenership to the interface in question.
1467 * The link layer provides a routine which converts
1471 struct ifnet
*ifp
, /* interface to manipulate */
1472 struct sockaddr
*sa
, /* address to add */
1473 struct ifmultiaddr
**retifma
)
1475 struct sockaddr
*llsa
, *dupsa
;
1477 struct ifmultiaddr
*ifma
;
1480 * If the matching multicast address already exists
1481 * then don't add a new one, just add a reference
1483 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
) {
1484 if (sa_equal(sa
, ifma
->ifma_addr
)) {
1485 ifma
->ifma_refcount
++;
1493 * Give the link layer a chance to accept/reject it, and also
1494 * find out which AF_LINK address this maps to, if it isn't one
1497 if (ifp
->if_resolvemulti
) {
1498 lwkt_serialize_enter(ifp
->if_serializer
);
1499 error
= ifp
->if_resolvemulti(ifp
, &llsa
, sa
);
1500 lwkt_serialize_exit(ifp
->if_serializer
);
1507 MALLOC(ifma
, struct ifmultiaddr
*, sizeof *ifma
, M_IFMADDR
, M_WAITOK
);
1508 MALLOC(dupsa
, struct sockaddr
*, sa
->sa_len
, M_IFMADDR
, M_WAITOK
);
1509 bcopy(sa
, dupsa
, sa
->sa_len
);
1511 ifma
->ifma_addr
= dupsa
;
1512 ifma
->ifma_lladdr
= llsa
;
1513 ifma
->ifma_ifp
= ifp
;
1514 ifma
->ifma_refcount
= 1;
1515 ifma
->ifma_protospec
= 0;
1516 rt_newmaddrmsg(RTM_NEWMADDR
, ifma
);
1519 * Some network interfaces can scan the address list at
1520 * interrupt time; lock them out.
1523 LIST_INSERT_HEAD(&ifp
->if_multiaddrs
, ifma
, ifma_link
);
1528 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
) {
1529 if (sa_equal(ifma
->ifma_addr
, llsa
))
1533 ifma
->ifma_refcount
++;
1535 MALLOC(ifma
, struct ifmultiaddr
*, sizeof *ifma
,
1536 M_IFMADDR
, M_WAITOK
);
1537 MALLOC(dupsa
, struct sockaddr
*, llsa
->sa_len
,
1538 M_IFMADDR
, M_WAITOK
);
1539 bcopy(llsa
, dupsa
, llsa
->sa_len
);
1540 ifma
->ifma_addr
= dupsa
;
1541 ifma
->ifma_ifp
= ifp
;
1542 ifma
->ifma_refcount
= 1;
1544 LIST_INSERT_HEAD(&ifp
->if_multiaddrs
, ifma
, ifma_link
);
1549 * We are certain we have added something, so call down to the
1550 * interface to let them know about it.
1553 lwkt_serialize_enter(ifp
->if_serializer
);
1554 ifp
->if_ioctl(ifp
, SIOCADDMULTI
, 0, (struct ucred
*)NULL
);
1555 lwkt_serialize_exit(ifp
->if_serializer
);
1562 * Remove a reference to a multicast address on this interface. Yell
1563 * if the request does not match an existing membership.
1566 if_delmulti(struct ifnet
*ifp
, struct sockaddr
*sa
)
1568 struct ifmultiaddr
*ifma
;
1570 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1571 if (sa_equal(sa
, ifma
->ifma_addr
))
1576 if (ifma
->ifma_refcount
> 1) {
1577 ifma
->ifma_refcount
--;
1581 rt_newmaddrmsg(RTM_DELMADDR
, ifma
);
1582 sa
= ifma
->ifma_lladdr
;
1584 LIST_REMOVE(ifma
, ifma_link
);
1586 * Make sure the interface driver is notified
1587 * in the case of a link layer mcast group being left.
1589 if (ifma
->ifma_addr
->sa_family
== AF_LINK
&& sa
== 0) {
1590 lwkt_serialize_enter(ifp
->if_serializer
);
1591 ifp
->if_ioctl(ifp
, SIOCDELMULTI
, 0, (struct ucred
*)NULL
);
1592 lwkt_serialize_exit(ifp
->if_serializer
);
1595 kfree(ifma
->ifma_addr
, M_IFMADDR
);
1596 kfree(ifma
, M_IFMADDR
);
1601 * Now look for the link-layer address which corresponds to
1602 * this network address. It had been squirreled away in
1603 * ifma->ifma_lladdr for this purpose (so we don't have
1604 * to call ifp->if_resolvemulti() again), and we saved that
1605 * value in sa above. If some nasty deleted the
1606 * link-layer address out from underneath us, we can deal because
1607 * the address we stored was is not the same as the one which was
1608 * in the record for the link-layer address. (So we don't complain
1611 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1612 if (sa_equal(sa
, ifma
->ifma_addr
))
1617 if (ifma
->ifma_refcount
> 1) {
1618 ifma
->ifma_refcount
--;
1623 lwkt_serialize_enter(ifp
->if_serializer
);
1624 LIST_REMOVE(ifma
, ifma_link
);
1625 ifp
->if_ioctl(ifp
, SIOCDELMULTI
, 0, (struct ucred
*)NULL
);
1626 lwkt_serialize_exit(ifp
->if_serializer
);
1628 kfree(ifma
->ifma_addr
, M_IFMADDR
);
1629 kfree(sa
, M_IFMADDR
);
1630 kfree(ifma
, M_IFMADDR
);
1636 * Set the link layer address on an interface.
1638 * At this time we only support certain types of interfaces,
1639 * and we don't allow the length of the address to change.
1642 if_setlladdr(struct ifnet
*ifp
, const u_char
*lladdr
, int len
)
1644 struct sockaddr_dl
*sdl
;
1647 sdl
= IF_LLSOCKADDR(ifp
);
1650 if (len
!= sdl
->sdl_alen
) /* don't allow length to change */
1652 switch (ifp
->if_type
) {
1653 case IFT_ETHER
: /* these types use struct arpcom */
1656 bcopy(lladdr
, ((struct arpcom
*)ifp
->if_softc
)->ac_enaddr
, len
);
1657 bcopy(lladdr
, LLADDR(sdl
), len
);
1663 * If the interface is already up, we need
1664 * to re-init it in order to reprogram its
1667 lwkt_serialize_enter(ifp
->if_serializer
);
1668 if ((ifp
->if_flags
& IFF_UP
) != 0) {
1669 struct ifaddr_container
*ifac
;
1671 ifp
->if_flags
&= ~IFF_UP
;
1672 ifr
.ifr_flags
= ifp
->if_flags
;
1673 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1674 ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1675 (struct ucred
*)NULL
);
1676 ifp
->if_flags
|= IFF_UP
;
1677 ifr
.ifr_flags
= ifp
->if_flags
;
1678 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1679 ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1680 (struct ucred
*)NULL
);
1683 * Also send gratuitous ARPs to notify other nodes about
1684 * the address change.
1686 TAILQ_FOREACH(ifac
, &ifp
->if_addrheads
[mycpuid
], ifa_link
) {
1687 struct ifaddr
*ifa
= ifac
->ifa
;
1689 if (ifa
->ifa_addr
!= NULL
&&
1690 ifa
->ifa_addr
->sa_family
== AF_INET
)
1691 arp_ifinit(ifp
, ifa
);
1695 lwkt_serialize_exit(ifp
->if_serializer
);
1699 struct ifmultiaddr
*
1700 ifmaof_ifpforaddr(struct sockaddr
*sa
, struct ifnet
*ifp
)
1702 struct ifmultiaddr
*ifma
;
1704 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1705 if (sa_equal(ifma
->ifma_addr
, sa
))
1712 * This function locates the first real ethernet MAC from a network
1713 * card and loads it into node, returning 0 on success or ENOENT if
1714 * no suitable interfaces were found. It is used by the uuid code to
1715 * generate a unique 6-byte number.
1718 if_getanyethermac(uint16_t *node
, int minlen
)
1721 struct sockaddr_dl
*sdl
;
1723 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
1724 if (ifp
->if_type
!= IFT_ETHER
)
1726 sdl
= IF_LLSOCKADDR(ifp
);
1727 if (sdl
->sdl_alen
< minlen
)
1729 bcopy(((struct arpcom
*)ifp
->if_softc
)->ac_enaddr
, node
,
1737 * The name argument must be a pointer to storage which will last as
1738 * long as the interface does. For physical devices, the result of
1739 * device_get_name(dev) is a good choice and for pseudo-devices a
1740 * static string works well.
1743 if_initname(struct ifnet
*ifp
, const char *name
, int unit
)
1745 ifp
->if_dname
= name
;
1746 ifp
->if_dunit
= unit
;
1747 if (unit
!= IF_DUNIT_NONE
)
1748 ksnprintf(ifp
->if_xname
, IFNAMSIZ
, "%s%d", name
, unit
);
1750 strlcpy(ifp
->if_xname
, name
, IFNAMSIZ
);
1754 if_printf(struct ifnet
*ifp
, const char *fmt
, ...)
1759 retval
= kprintf("%s: ", ifp
->if_xname
);
1760 __va_start(ap
, fmt
);
1761 retval
+= kvprintf(fmt
, ap
);
1767 ifq_set_classic(struct ifaltq
*ifq
)
1769 ifq
->altq_enqueue
= ifq_classic_enqueue
;
1770 ifq
->altq_dequeue
= ifq_classic_dequeue
;
1771 ifq
->altq_request
= ifq_classic_request
;
1775 ifq_classic_enqueue(struct ifaltq
*ifq
, struct mbuf
*m
,
1776 struct altq_pktattr
*pa __unused
)
1779 if (IF_QFULL(ifq
)) {
1790 static struct mbuf
*
1791 ifq_classic_dequeue(struct ifaltq
*ifq
, struct mbuf
*mpolled
, int op
)
1804 panic("unsupported ALTQ dequeue op: %d", op
);
1807 KKASSERT(mpolled
== NULL
|| mpolled
== m
);
1812 ifq_classic_request(struct ifaltq
*ifq
, int req
, void *arg
)
1820 panic("unsupported ALTQ request: %d", req
);
1827 ifa_create(int size
, int flags
)
1832 KASSERT(size
>= sizeof(*ifa
), ("ifaddr size too small\n"));
1834 ifa
= kmalloc(size
, M_IFADDR
, flags
| M_ZERO
);
1838 ifa
->ifa_containers
= kmalloc(ncpus
* sizeof(struct ifaddr_container
),
1839 M_IFADDR
, M_WAITOK
| M_ZERO
);
1840 ifa
->ifa_cpumask
= smp_active_mask
;
1841 for (i
= 0; i
< ncpus
; ++i
) {
1842 struct ifaddr_container
*ifac
= &ifa
->ifa_containers
[i
];
1844 ifac
->ifa_magic
= IFA_CONTAINER_MAGIC
;
1846 ifac
->ifa_refcnt
= 1;
1849 kprintf("alloc ifa %p %d\n", ifa
, size
);
1854 struct ifac_free_arg
{
1860 ifac_free_dispatch(struct netmsg
*nmsg
)
1862 struct lwkt_msg
*msg
= &nmsg
->nm_lmsg
;
1863 struct ifac_free_arg
*arg
= msg
->u
.ms_resultp
;
1864 struct ifaddr
*ifa
= arg
->ifa
;
1866 ifa
->ifa_cpumask
&= ~(1 << arg
->cpuid
);
1867 if (ifa
->ifa_cpumask
== 0) {
1869 kprintf("free ifa %p\n", ifa
);
1871 kfree(ifa
->ifa_containers
, M_IFADDR
);
1872 kfree(ifa
, M_IFADDR
);
1874 lwkt_replymsg(msg
, 0);
1878 ifac_free(struct ifaddr_container
*ifac
, int cpu_id
)
1880 struct ifac_free_arg arg
;
1882 struct lwkt_msg
*msg
;
1884 KKASSERT(ifac
->ifa_magic
== IFA_CONTAINER_MAGIC
);
1885 KKASSERT(ifac
->ifa_refcnt
== 0);
1887 ifac
->ifa_magic
= IFA_CONTAINER_DEAD
;
1889 bzero(&arg
, sizeof(arg
));
1890 arg
.ifa
= ifac
->ifa
;
1892 #ifdef IFADDR_DEBUG_VERBOSE
1893 kprintf("try free ifa %p cpu_id %d\n", ifac
->ifa
, arg
.cpuid
);
1896 netmsg_init(&nmsg
, &curthread
->td_msgport
, 0, ifac_free_dispatch
);
1897 msg
= &nmsg
.nm_lmsg
;
1898 msg
->u
.ms_resultp
= &arg
;
1900 lwkt_domsg(ifa_portfn(0), msg
, 0);
1903 static __inline
void
1904 ifa_forwardmsg(struct lwkt_msg
*lmsg
, int next_cpu
)
1906 if (next_cpu
< ncpus
)
1907 lwkt_forwardmsg(ifa_portfn(next_cpu
), lmsg
);
1909 lwkt_replymsg(lmsg
, 0);
1913 ifa_iflink_dispatch(struct netmsg
*nmsg
)
1915 struct netmsg_ifaddr
*msg
= (struct netmsg_ifaddr
*)nmsg
;
1916 struct ifaddr
*ifa
= msg
->ifa
;
1917 struct ifnet
*ifp
= msg
->ifp
;
1922 TAILQ_INSERT_TAIL(&ifp
->if_addrheads
[cpu
],
1923 &ifa
->ifa_containers
[cpu
], ifa_link
);
1925 TAILQ_INSERT_HEAD(&ifp
->if_addrheads
[cpu
],
1926 &ifa
->ifa_containers
[cpu
], ifa_link
);
1930 ifa_forwardmsg(&nmsg
->nm_lmsg
, cpu
+ 1);
1934 ifa_iflink(struct ifaddr
*ifa
, struct ifnet
*ifp
, int tail
)
1936 struct netmsg_ifaddr msg
;
1938 netmsg_init(&msg
.netmsg
, &curthread
->td_msgport
, 0,
1939 ifa_iflink_dispatch
);
1944 lwkt_domsg(ifa_portfn(0), &msg
.netmsg
.nm_lmsg
, 0);
1948 ifa_ifunlink_dispatch(struct netmsg
*nmsg
)
1950 struct netmsg_ifaddr
*msg
= (struct netmsg_ifaddr
*)nmsg
;
1951 struct ifaddr
*ifa
= msg
->ifa
;
1952 struct ifnet
*ifp
= msg
->ifp
;
1956 TAILQ_REMOVE(&ifp
->if_addrheads
[cpu
],
1957 &ifa
->ifa_containers
[cpu
], ifa_link
);
1960 ifa_forwardmsg(&nmsg
->nm_lmsg
, cpu
+ 1);
1964 ifa_ifunlink(struct ifaddr
*ifa
, struct ifnet
*ifp
)
1966 struct netmsg_ifaddr msg
;
1968 netmsg_init(&msg
.netmsg
, &curthread
->td_msgport
, 0,
1969 ifa_ifunlink_dispatch
);
1973 lwkt_domsg(ifa_portfn(0), &msg
.netmsg
.nm_lmsg
, 0);
1977 ifa_destroy_dispatch(struct netmsg
*nmsg
)
1979 struct netmsg_ifaddr
*msg
= (struct netmsg_ifaddr
*)nmsg
;
1982 ifa_forwardmsg(&nmsg
->nm_lmsg
, mycpuid
+ 1);
1986 ifa_destroy(struct ifaddr
*ifa
)
1988 struct netmsg_ifaddr msg
;
1990 netmsg_init(&msg
.netmsg
, &curthread
->td_msgport
, 0,
1991 ifa_destroy_dispatch
);
1994 lwkt_domsg(ifa_portfn(0), &msg
.netmsg
.nm_lmsg
, 0);
2000 return &ifaddr_threads
[cpu
].td_msgport
;
2004 ifaddrinit(void *dummy __unused
)
2008 for (i
= 0; i
< ncpus
; ++i
) {
2009 struct thread
*thr
= &ifaddr_threads
[i
];
2011 lwkt_create(netmsg_service_loop
, NULL
, NULL
, thr
, 0, i
,
2013 netmsg_service_port_init(&thr
->td_msgport
);