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 1.46 2006/09/05 00:55:46 dillon 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/serialize.h>
62 #include <net/if_arp.h>
63 #include <net/if_dl.h>
64 #include <net/if_types.h>
65 #include <net/if_var.h>
66 #include <net/ifq_var.h>
67 #include <net/radix.h>
68 #include <net/route.h>
69 #include <machine/stdarg.h>
71 #include <sys/thread2.h>
73 #if defined(INET) || defined(INET6)
75 #include <netinet/in.h>
76 #include <netinet/in_var.h>
77 #include <netinet/if_ether.h>
79 #include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
80 #include <netinet6/in6_var.h>
81 #include <netinet6/in6_ifattach.h>
85 #if defined(COMPAT_43)
86 #include <emulation/43bsd/43bsd_socket.h>
87 #endif /* COMPAT_43 */
90 * Support for non-ALTQ interfaces.
92 static int ifq_classic_enqueue(struct ifaltq
*, struct mbuf
*,
93 struct altq_pktattr
*);
95 ifq_classic_dequeue(struct ifaltq
*, struct mbuf
*, int);
96 static int ifq_classic_request(struct ifaltq
*, int, void *);
99 * System initialization
102 static void if_attachdomain(void *);
103 static void if_attachdomain1(struct ifnet
*);
104 static int ifconf (u_long
, caddr_t
, struct ucred
*);
105 static void ifinit (void *);
106 static void if_slowtimo (void *);
107 static void link_rtrequest (int, struct rtentry
*, struct rt_addrinfo
*);
108 static int if_rtdel (struct radix_node
*, void *);
110 SYSINIT(interfaces
, SI_SUB_PROTO_IF
, SI_ORDER_FIRST
, ifinit
, NULL
)
112 MALLOC_DEFINE(M_IFADDR
, "ifaddr", "interface address");
113 MALLOC_DEFINE(M_IFMADDR
, "ether_multi", "link-level multicast address");
114 MALLOC_DEFINE(M_CLONE
, "clone", "interface cloning framework");
116 int ifqmaxlen
= IFQ_MAXLEN
;
117 struct ifnethead ifnet
; /* depend on static init XXX */
121 * XXX: declare here to avoid to include many inet6 related files..
122 * should be more generalized?
124 extern void nd6_setmtu (struct ifnet
*);
127 struct if_clone
*if_clone_lookup (const char *, int *);
128 int if_clone_list (struct if_clonereq
*);
130 LIST_HEAD(, if_clone
) if_cloners
= LIST_HEAD_INITIALIZER(if_cloners
);
131 int if_cloners_count
;
133 struct callout if_slowtimo_timer
;
136 * Network interface utility routines.
138 * Routines with ifa_ifwith* names take sockaddr *'s as
147 callout_init(&if_slowtimo_timer
);
150 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
151 if (ifp
->if_snd
.ifq_maxlen
== 0) {
152 if_printf(ifp
, "XXX: driver didn't set ifq_maxlen\n");
153 ifp
->if_snd
.ifq_maxlen
= ifqmaxlen
;
162 struct ifnet
**ifindex2ifnet
= NULL
;
165 * Attach an interface to the list of "active" interfaces.
167 * The serializer is optional. If non-NULL access to the interface
171 if_attach(struct ifnet
*ifp
, lwkt_serialize_t serializer
)
173 unsigned socksize
, ifasize
;
174 int namelen
, masklen
;
175 struct sockaddr_dl
*sdl
;
179 static int if_indexlim
= 8;
180 static boolean_t inited
;
188 * The serializer can be passed in from the device, allowing the
189 * same serializer to be used for both the interrupt interlock and
190 * the device queue. If not specified, the netif structure will
191 * use an embedded serializer.
193 if (serializer
== NULL
) {
194 serializer
= &ifp
->if_default_serializer
;
195 lwkt_serialize_init(serializer
);
197 ifp
->if_serializer
= serializer
;
199 TAILQ_INSERT_TAIL(&ifnet
, ifp
, if_link
);
200 ifp
->if_index
= ++if_index
;
203 * The old code would work if the interface passed a pre-existing
204 * chain of ifaddrs to this code. We don't trust our callers to
205 * properly initialize the tailq, however, so we no longer allow
206 * this unlikely case.
208 TAILQ_INIT(&ifp
->if_addrhead
);
209 TAILQ_INIT(&ifp
->if_prefixhead
);
210 LIST_INIT(&ifp
->if_multiaddrs
);
211 getmicrotime(&ifp
->if_lastchange
);
212 if (ifindex2ifnet
== NULL
|| if_index
>= if_indexlim
) {
218 /* grow ifindex2ifnet */
219 n
= if_indexlim
* sizeof(*q
);
220 q
= kmalloc(n
, M_IFADDR
, M_WAITOK
| M_ZERO
);
222 bcopy(ifindex2ifnet
, q
, n
/2);
223 kfree(ifindex2ifnet
, M_IFADDR
);
228 ifindex2ifnet
[if_index
] = ifp
;
231 * create a Link Level name for this device
233 namelen
= strlen(ifp
->if_xname
);
234 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
235 masklen
= _offsetof(struct sockaddr_dl
, sdl_data
[0]) + namelen
;
236 socksize
= masklen
+ ifp
->if_addrlen
;
237 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
238 if (socksize
< sizeof(*sdl
))
239 socksize
= sizeof(*sdl
);
240 socksize
= ROUNDUP(socksize
);
241 ifasize
= sizeof(struct ifaddr
) + 2 * socksize
;
242 ifa
= kmalloc(ifasize
, M_IFADDR
, M_WAITOK
| M_ZERO
);
243 sdl
= (struct sockaddr_dl
*)(ifa
+ 1);
244 sdl
->sdl_len
= socksize
;
245 sdl
->sdl_family
= AF_LINK
;
246 bcopy(ifp
->if_xname
, sdl
->sdl_data
, namelen
);
247 sdl
->sdl_nlen
= namelen
;
248 sdl
->sdl_index
= ifp
->if_index
;
249 sdl
->sdl_type
= ifp
->if_type
;
250 ifp
->if_lladdr
= ifa
;
252 ifa
->ifa_rtrequest
= link_rtrequest
;
253 ifa
->ifa_addr
= (struct sockaddr
*)sdl
;
254 sdl
= (struct sockaddr_dl
*)(socksize
+ (caddr_t
)sdl
);
255 ifa
->ifa_netmask
= (struct sockaddr
*)sdl
;
256 sdl
->sdl_len
= masklen
;
258 sdl
->sdl_data
[--namelen
] = 0xff;
259 TAILQ_INSERT_HEAD(&ifp
->if_addrhead
, ifa
, ifa_link
);
261 EVENTHANDLER_INVOKE(ifnet_attach_event
, ifp
);
265 ifq
->altq_disc
= NULL
;
266 ifq
->altq_flags
&= ALTQF_CANTCHANGE
;
267 ifq
->altq_tbr
= NULL
;
269 ifq_set_classic(ifq
);
271 if (!SLIST_EMPTY(&domains
))
272 if_attachdomain1(ifp
);
274 /* Announce the interface. */
275 rt_ifannouncemsg(ifp
, IFAN_ARRIVAL
);
279 if_attachdomain(void *dummy
)
284 TAILQ_FOREACH(ifp
, &ifnet
, if_list
)
285 if_attachdomain1(ifp
);
288 SYSINIT(domainifattach
, SI_SUB_PROTO_IFATTACHDOMAIN
, SI_ORDER_FIRST
,
289 if_attachdomain
, NULL
);
292 if_attachdomain1(struct ifnet
*ifp
)
298 /* address family dependent data region */
299 bzero(ifp
->if_afdata
, sizeof(ifp
->if_afdata
));
300 SLIST_FOREACH(dp
, &domains
, dom_next
)
301 if (dp
->dom_ifattach
)
302 ifp
->if_afdata
[dp
->dom_family
] =
303 (*dp
->dom_ifattach
)(ifp
);
308 * Detach an interface, removing it from the
309 * list of "active" interfaces.
312 if_detach(struct ifnet
*ifp
)
315 struct radix_node_head
*rnh
;
320 EVENTHANDLER_INVOKE(ifnet_detach_event
, ifp
);
323 * Remove routes and flush queues.
326 #ifdef DEVICE_POLLING
327 if (ifp
->if_flags
& IFF_POLLING
)
328 ether_poll_deregister(ifp
);
332 if (ifq_is_enabled(&ifp
->if_snd
))
333 altq_disable(&ifp
->if_snd
);
334 if (ifq_is_attached(&ifp
->if_snd
))
335 altq_detach(&ifp
->if_snd
);
338 * Clean up all addresses.
340 ifp
->if_lladdr
= NULL
;
342 for (ifa
= TAILQ_FIRST(&ifp
->if_addrhead
); ifa
;
343 ifa
= TAILQ_FIRST(&ifp
->if_addrhead
)) {
345 /* XXX: Ugly!! ad hoc just for INET */
346 if (ifa
->ifa_addr
&& ifa
->ifa_addr
->sa_family
== AF_INET
) {
347 struct ifaliasreq ifr
;
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
) {
361 /* ifp_addrhead is already updated */
365 TAILQ_REMOVE(&ifp
->if_addrhead
, ifa
, ifa_link
);
371 * Remove all IPv4 kernel structures related to ifp.
378 * Remove all IPv6 kernel structs related to ifp. This should be done
379 * before removing routing entries below, since IPv6 interface direct
380 * routes are expected to be removed by the IPv6-specific kernel API.
381 * Otherwise, the kernel will detect some inconsistency and bark it.
387 * Delete all remaining routes using this interface
388 * Unfortuneatly the only way to do this is to slog through
389 * the entire routing table looking for routes which point
390 * to this interface...oh well...
393 for (cpu
= 0; cpu
< ncpus2
; cpu
++) {
394 lwkt_migratecpu(cpu
);
395 for (i
= 1; i
<= AF_MAX
; i
++) {
396 if ((rnh
= rt_tables
[mycpuid
][i
]) == NULL
)
398 rnh
->rnh_walktree(rnh
, if_rtdel
, ifp
);
401 lwkt_migratecpu(origcpu
);
403 /* Announce that the interface is gone. */
404 rt_ifannouncemsg(ifp
, IFAN_DEPARTURE
);
406 SLIST_FOREACH(dp
, &domains
, dom_next
)
407 if (dp
->dom_ifdetach
&& ifp
->if_afdata
[dp
->dom_family
])
408 (*dp
->dom_ifdetach
)(ifp
,
409 ifp
->if_afdata
[dp
->dom_family
]);
412 * Remove interface from ifindex2ifp[] and maybe decrement if_index.
414 ifindex2ifnet
[ifp
->if_index
] = NULL
;
415 while (if_index
> 0 && ifindex2ifnet
[if_index
] == NULL
)
418 TAILQ_REMOVE(&ifnet
, ifp
, if_link
);
423 * Delete Routes for a Network Interface
425 * Called for each routing entry via the rnh->rnh_walktree() call above
426 * to delete all route entries referencing a detaching network interface.
429 * rn pointer to node in the routing table
430 * arg argument passed to rnh->rnh_walktree() - detaching interface
434 * errno failed - reason indicated
438 if_rtdel(struct radix_node
*rn
, void *arg
)
440 struct rtentry
*rt
= (struct rtentry
*)rn
;
441 struct ifnet
*ifp
= arg
;
444 if (rt
->rt_ifp
== ifp
) {
447 * Protect (sorta) against walktree recursion problems
450 if (!(rt
->rt_flags
& RTF_UP
))
453 err
= rtrequest(RTM_DELETE
, rt_key(rt
), rt
->rt_gateway
,
454 rt_mask(rt
), rt
->rt_flags
,
455 (struct rtentry
**) NULL
);
457 log(LOG_WARNING
, "if_rtdel: error %d\n", err
);
465 * Create a clone network interface.
468 if_clone_create(char *name
, int len
)
470 struct if_clone
*ifc
;
472 int wildcard
, bytoff
, bitoff
;
476 ifc
= if_clone_lookup(name
, &unit
);
480 if (ifunit(name
) != NULL
)
484 wildcard
= (unit
< 0);
486 * Find a free unit if none was given.
489 while (bytoff
< ifc
->ifc_bmlen
&&
490 ifc
->ifc_units
[bytoff
] == 0xff)
492 if (bytoff
>= ifc
->ifc_bmlen
)
494 while ((ifc
->ifc_units
[bytoff
] & (1 << bitoff
)) != 0)
496 unit
= (bytoff
<< 3) + bitoff
;
499 if (unit
> ifc
->ifc_maxunit
)
502 err
= (*ifc
->ifc_create
)(ifc
, unit
);
508 bitoff
= unit
- (bytoff
<< 3);
512 * Allocate the unit in the bitmap.
514 KASSERT((ifc
->ifc_units
[bytoff
] & (1 << bitoff
)) == 0,
515 ("%s: bit is already set", __func__
));
516 ifc
->ifc_units
[bytoff
] |= (1 << bitoff
);
518 /* In the wildcard case, we need to update the name. */
520 for (dp
= name
; *dp
!= '\0'; dp
++);
521 if (snprintf(dp
, len
- (dp
-name
), "%d", unit
) >
522 len
- (dp
-name
) - 1) {
524 * This can only be a programmer error and
525 * there's no straightforward way to recover if
528 panic("if_clone_create(): interface name too long");
533 EVENTHANDLER_INVOKE(if_clone_event
, ifc
);
539 * Destroy a clone network interface.
542 if_clone_destroy(const char *name
)
544 struct if_clone
*ifc
;
549 ifc
= if_clone_lookup(name
, &unit
);
553 if (unit
< ifc
->ifc_minifs
)
560 if (ifc
->ifc_destroy
== NULL
)
563 (*ifc
->ifc_destroy
)(ifp
);
566 * Compute offset in the bitmap and deallocate the unit.
569 bitoff
= unit
- (bytoff
<< 3);
570 KASSERT((ifc
->ifc_units
[bytoff
] & (1 << bitoff
)) != 0,
571 ("%s: bit is already cleared", __func__
));
572 ifc
->ifc_units
[bytoff
] &= ~(1 << bitoff
);
577 * Look up a network interface cloner.
580 if_clone_lookup(const char *name
, int *unitp
)
582 struct if_clone
*ifc
;
586 for (ifc
= LIST_FIRST(&if_cloners
); ifc
!= NULL
;) {
587 for (cp
= name
, i
= 0; i
< ifc
->ifc_namelen
; i
++, cp
++) {
588 if (ifc
->ifc_name
[i
] != *cp
)
593 ifc
= LIST_NEXT(ifc
, ifc_list
);
597 return ((struct if_clone
*)NULL
);
603 for (i
= 0; *cp
!= '\0'; cp
++) {
604 if (*cp
< '0' || *cp
> '9') {
605 /* Bogus unit number. */
608 i
= (i
* 10) + (*cp
- '0');
618 * Register a network interface cloner.
621 if_clone_attach(struct if_clone
*ifc
)
628 KASSERT(ifc
->ifc_minifs
- 1 <= ifc
->ifc_maxunit
,
629 ("%s: %s requested more units then allowed (%d > %d)",
630 __func__
, ifc
->ifc_name
, ifc
->ifc_minifs
,
631 ifc
->ifc_maxunit
+ 1));
633 * Compute bitmap size and allocate it.
635 maxclone
= ifc
->ifc_maxunit
+ 1;
637 if ((len
<< 3) < maxclone
)
639 ifc
->ifc_units
= kmalloc(len
, M_CLONE
, M_WAITOK
| M_ZERO
);
640 ifc
->ifc_bmlen
= len
;
642 LIST_INSERT_HEAD(&if_cloners
, ifc
, ifc_list
);
645 for (unit
= 0; unit
< ifc
->ifc_minifs
; unit
++) {
646 err
= (*ifc
->ifc_create
)(ifc
, unit
);
648 ("%s: failed to create required interface %s%d",
649 __func__
, ifc
->ifc_name
, unit
));
651 /* Allocate the unit in the bitmap. */
653 bitoff
= unit
- (bytoff
<< 3);
654 ifc
->ifc_units
[bytoff
] |= (1 << bitoff
);
659 * Unregister a network interface cloner.
662 if_clone_detach(struct if_clone
*ifc
)
665 LIST_REMOVE(ifc
, ifc_list
);
666 kfree(ifc
->ifc_units
, M_CLONE
);
671 * Provide list of interface cloners to userspace.
674 if_clone_list(struct if_clonereq
*ifcr
)
676 char outbuf
[IFNAMSIZ
], *dst
;
677 struct if_clone
*ifc
;
678 int count
, error
= 0;
680 ifcr
->ifcr_total
= if_cloners_count
;
681 if ((dst
= ifcr
->ifcr_buffer
) == NULL
) {
682 /* Just asking how many there are. */
686 if (ifcr
->ifcr_count
< 0)
689 count
= (if_cloners_count
< ifcr
->ifcr_count
) ?
690 if_cloners_count
: ifcr
->ifcr_count
;
692 for (ifc
= LIST_FIRST(&if_cloners
); ifc
!= NULL
&& count
!= 0;
693 ifc
= LIST_NEXT(ifc
, ifc_list
), count
--, dst
+= IFNAMSIZ
) {
694 strlcpy(outbuf
, ifc
->ifc_name
, IFNAMSIZ
);
695 error
= copyout(outbuf
, dst
, IFNAMSIZ
);
704 * Locate an interface based on a complete address.
707 ifa_ifwithaddr(struct sockaddr
*addr
)
712 TAILQ_FOREACH(ifp
, &ifnet
, if_link
)
713 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
714 if (ifa
->ifa_addr
->sa_family
!= addr
->sa_family
)
716 if (sa_equal(addr
, ifa
->ifa_addr
))
718 if ((ifp
->if_flags
& IFF_BROADCAST
) && ifa
->ifa_broadaddr
&&
719 /* IPv6 doesn't have broadcast */
720 ifa
->ifa_broadaddr
->sa_len
!= 0 &&
721 sa_equal(ifa
->ifa_broadaddr
, addr
))
724 return ((struct ifaddr
*)NULL
);
727 * Locate the point to point interface with a given destination address.
730 ifa_ifwithdstaddr(struct sockaddr
*addr
)
735 TAILQ_FOREACH(ifp
, &ifnet
, if_link
)
736 if (ifp
->if_flags
& IFF_POINTOPOINT
)
737 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
738 if (ifa
->ifa_addr
->sa_family
!= addr
->sa_family
)
740 if (ifa
->ifa_dstaddr
&&
741 sa_equal(addr
, ifa
->ifa_dstaddr
))
744 return ((struct ifaddr
*)NULL
);
748 * Find an interface on a specific network. If many, choice
749 * is most specific found.
752 ifa_ifwithnet(struct sockaddr
*addr
)
756 struct ifaddr
*ifa_maybe
= (struct ifaddr
*) 0;
757 u_int af
= addr
->sa_family
;
758 char *addr_data
= addr
->sa_data
, *cplim
;
761 * AF_LINK addresses can be looked up directly by their index number,
762 * so do that if we can.
765 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*)addr
;
767 if (sdl
->sdl_index
&& sdl
->sdl_index
<= if_index
)
768 return (ifindex2ifnet
[sdl
->sdl_index
]->if_lladdr
);
772 * Scan though each interface, looking for ones that have
773 * addresses in this address family.
775 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
776 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
777 char *cp
, *cp2
, *cp3
;
779 if (ifa
->ifa_addr
->sa_family
!= af
)
781 if (af
== AF_INET
&& ifp
->if_flags
& IFF_POINTOPOINT
) {
783 * This is a bit broken as it doesn't
784 * take into account that the remote end may
785 * be a single node in the network we are
787 * The trouble is that we don't know the
788 * netmask for the remote end.
790 if (ifa
->ifa_dstaddr
!= NULL
&&
791 sa_equal(addr
, ifa
->ifa_dstaddr
))
795 * if we have a special address handler,
796 * then use it instead of the generic one.
798 if (ifa
->ifa_claim_addr
) {
799 if ((*ifa
->ifa_claim_addr
)(ifa
, addr
)) {
807 * Scan all the bits in the ifa's address.
808 * If a bit dissagrees with what we are
809 * looking for, mask it with the netmask
810 * to see if it really matters.
813 if (ifa
->ifa_netmask
== 0)
816 cp2
= ifa
->ifa_addr
->sa_data
;
817 cp3
= ifa
->ifa_netmask
->sa_data
;
818 cplim
= ifa
->ifa_netmask
->sa_len
+
819 (char *)ifa
->ifa_netmask
;
821 if ((*cp
++ ^ *cp2
++) & *cp3
++)
822 goto next
; /* next address! */
824 * If the netmask of what we just found
825 * is more specific than what we had before
826 * (if we had one) then remember the new one
827 * before continuing to search
828 * for an even better one.
830 if (ifa_maybe
== 0 ||
831 rn_refines((char *)ifa
->ifa_netmask
,
832 (char *)ifa_maybe
->ifa_netmask
))
841 * Find an interface address specific to an interface best matching
845 ifaof_ifpforaddr(struct sockaddr
*addr
, struct ifnet
*ifp
)
848 char *cp
, *cp2
, *cp3
;
850 struct ifaddr
*ifa_maybe
= 0;
851 u_int af
= addr
->sa_family
;
855 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
856 if (ifa
->ifa_addr
->sa_family
!= af
)
860 if (ifa
->ifa_netmask
== NULL
) {
861 if (sa_equal(addr
, ifa
->ifa_addr
) ||
862 (ifa
->ifa_dstaddr
!= NULL
&&
863 sa_equal(addr
, ifa
->ifa_dstaddr
)))
867 if (ifp
->if_flags
& IFF_POINTOPOINT
) {
868 if (sa_equal(addr
, ifa
->ifa_dstaddr
))
872 cp2
= ifa
->ifa_addr
->sa_data
;
873 cp3
= ifa
->ifa_netmask
->sa_data
;
874 cplim
= ifa
->ifa_netmask
->sa_len
+ (char *)ifa
->ifa_netmask
;
875 for (; cp3
< cplim
; cp3
++)
876 if ((*cp
++ ^ *cp2
++) & *cp3
)
885 #include <net/route.h>
888 * Default action when installing a route with a Link Level gateway.
889 * Lookup an appropriate real ifa to point to.
890 * This should be moved to /sys/net/link.c eventually.
893 link_rtrequest(int cmd
, struct rtentry
*rt
, struct rt_addrinfo
*info
)
896 struct sockaddr
*dst
;
899 if (cmd
!= RTM_ADD
|| (ifa
= rt
->rt_ifa
) == NULL
||
900 (ifp
= ifa
->ifa_ifp
) == NULL
|| (dst
= rt_key(rt
)) == NULL
)
902 ifa
= ifaof_ifpforaddr(dst
, ifp
);
907 if (ifa
->ifa_rtrequest
&& ifa
->ifa_rtrequest
!= link_rtrequest
)
908 ifa
->ifa_rtrequest(cmd
, rt
, info
);
913 * Mark an interface down and notify protocols of
915 * NOTE: must be called at splnet or eqivalent.
918 if_unroute(struct ifnet
*ifp
, int flag
, int fam
)
922 ifp
->if_flags
&= ~flag
;
923 getmicrotime(&ifp
->if_lastchange
);
924 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
)
925 if (fam
== PF_UNSPEC
|| (fam
== ifa
->ifa_addr
->sa_family
))
926 pfctlinput(PRC_IFDOWN
, ifa
->ifa_addr
);
927 ifq_purge(&ifp
->if_snd
);
932 * Mark an interface up and notify protocols of
934 * NOTE: must be called at splnet or eqivalent.
937 if_route(struct ifnet
*ifp
, int flag
, int fam
)
941 ifp
->if_flags
|= flag
;
942 getmicrotime(&ifp
->if_lastchange
);
943 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
)
944 if (fam
== PF_UNSPEC
|| (fam
== ifa
->ifa_addr
->sa_family
))
945 pfctlinput(PRC_IFUP
, ifa
->ifa_addr
);
953 * Mark an interface down and notify protocols of the transition. An
954 * interface going down is also considered to be a synchronizing event.
955 * We must ensure that all packet processing related to the interface
956 * has completed before we return so e.g. the caller can free the ifnet
957 * structure that the mbufs may be referencing.
959 * NOTE: must be called at splnet or eqivalent.
962 if_down(struct ifnet
*ifp
)
964 if_unroute(ifp
, IFF_UP
, AF_UNSPEC
);
965 netmsg_service_sync();
969 * Mark an interface up and notify protocols of
971 * NOTE: must be called at splnet or eqivalent.
974 if_up(struct ifnet
*ifp
)
977 if_route(ifp
, IFF_UP
, AF_UNSPEC
);
981 * Handle interface watchdog timer routines. Called
982 * from softclock, we decrement timers (if set) and
983 * call the appropriate interface routine on expiration.
986 if_slowtimo(void *arg
)
992 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
993 if (ifp
->if_timer
== 0 || --ifp
->if_timer
)
995 if (ifp
->if_watchdog
) {
996 if (lwkt_serialize_try(ifp
->if_serializer
)) {
997 (*ifp
->if_watchdog
)(ifp
);
998 lwkt_serialize_exit(ifp
->if_serializer
);
1000 /* try again next timeout */
1008 callout_reset(&if_slowtimo_timer
, hz
/ IFNET_SLOWHZ
, if_slowtimo
, NULL
);
1012 * Map interface name to
1013 * interface structure pointer.
1016 ifunit(const char *name
)
1021 * Search all the interfaces for this name/number
1024 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
1025 if (strncmp(ifp
->if_xname
, name
, IFNAMSIZ
) == 0)
1033 * Map interface name in a sockaddr_dl to
1034 * interface structure pointer.
1037 if_withname(struct sockaddr
*sa
)
1039 char ifname
[IFNAMSIZ
+1];
1040 struct sockaddr_dl
*sdl
= (struct sockaddr_dl
*)sa
;
1042 if ( (sa
->sa_family
!= AF_LINK
) || (sdl
->sdl_nlen
== 0) ||
1043 (sdl
->sdl_nlen
> IFNAMSIZ
) )
1047 * ifunit wants a null-terminated name. It may not be null-terminated
1048 * in the sockaddr. We don't want to change the caller's sockaddr,
1049 * and there might not be room to put the trailing null anyway, so we
1050 * make a local copy that we know we can null terminate safely.
1053 bcopy(sdl
->sdl_data
, ifname
, sdl
->sdl_nlen
);
1054 ifname
[sdl
->sdl_nlen
] = '\0';
1055 return ifunit(ifname
);
1063 ifioctl(struct socket
*so
, u_long cmd
, caddr_t data
, struct ucred
*cred
)
1071 size_t namelen
, onamelen
;
1072 char new_name
[IFNAMSIZ
];
1074 struct sockaddr_dl
*sdl
;
1080 return (ifconf(cmd
, data
, cred
));
1082 ifr
= (struct ifreq
*)data
;
1087 if ((error
= suser_cred(cred
, 0)) != 0)
1089 return ((cmd
== SIOCIFCREATE
) ?
1090 if_clone_create(ifr
->ifr_name
, sizeof(ifr
->ifr_name
)) :
1091 if_clone_destroy(ifr
->ifr_name
));
1093 case SIOCIFGCLONERS
:
1094 return (if_clone_list((struct if_clonereq
*)data
));
1097 ifp
= ifunit(ifr
->ifr_name
);
1103 ifr
->ifr_flags
= ifp
->if_flags
;
1104 ifr
->ifr_flagshigh
= ifp
->if_flags
>> 16;
1108 ifr
->ifr_reqcap
= ifp
->if_capabilities
;
1109 ifr
->ifr_curcap
= ifp
->if_capenable
;
1113 ifr
->ifr_metric
= ifp
->if_metric
;
1117 ifr
->ifr_mtu
= ifp
->if_mtu
;
1121 ifr
->ifr_phys
= ifp
->if_physical
;
1125 error
= suser_cred(cred
, 0);
1128 new_flags
= (ifr
->ifr_flags
& 0xffff) |
1129 (ifr
->ifr_flagshigh
<< 16);
1130 if (ifp
->if_flags
& IFF_SMART
) {
1131 /* Smart drivers twiddle their own routes */
1132 } else if (ifp
->if_flags
& IFF_UP
&&
1133 (new_flags
& IFF_UP
) == 0) {
1137 } else if (new_flags
& IFF_UP
&&
1138 (ifp
->if_flags
& IFF_UP
) == 0) {
1144 #ifdef DEVICE_POLLING
1145 if ((new_flags
^ ifp
->if_flags
) & IFF_POLLING
) {
1146 if (new_flags
& IFF_POLLING
) {
1147 ether_poll_register(ifp
);
1149 ether_poll_deregister(ifp
);
1154 ifp
->if_flags
= (ifp
->if_flags
& IFF_CANTCHANGE
) |
1155 (new_flags
&~ IFF_CANTCHANGE
);
1156 if (new_flags
& IFF_PPROMISC
) {
1157 /* Permanently promiscuous mode requested */
1158 ifp
->if_flags
|= IFF_PROMISC
;
1159 } else if (ifp
->if_pcount
== 0) {
1160 ifp
->if_flags
&= ~IFF_PROMISC
;
1162 if (ifp
->if_ioctl
) {
1163 lwkt_serialize_enter(ifp
->if_serializer
);
1164 ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1165 lwkt_serialize_exit(ifp
->if_serializer
);
1167 getmicrotime(&ifp
->if_lastchange
);
1171 error
= suser_cred(cred
, 0);
1174 if (ifr
->ifr_reqcap
& ~ifp
->if_capabilities
)
1176 lwkt_serialize_enter(ifp
->if_serializer
);
1177 ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1178 lwkt_serialize_exit(ifp
->if_serializer
);
1182 error
= suser_cred(cred
, 0);
1185 error
= copyinstr(ifr
->ifr_data
, new_name
, IFNAMSIZ
, NULL
);
1188 if (new_name
[0] == '\0')
1190 if (ifunit(new_name
) != NULL
)
1193 EVENTHANDLER_INVOKE(ifnet_detach_event
, ifp
);
1195 /* Announce the departure of the interface. */
1196 rt_ifannouncemsg(ifp
, IFAN_DEPARTURE
);
1198 strlcpy(ifp
->if_xname
, new_name
, sizeof(ifp
->if_xname
));
1199 ifa
= TAILQ_FIRST(&ifp
->if_addrhead
);
1200 /* XXX IFA_LOCK(ifa); */
1201 sdl
= (struct sockaddr_dl
*)ifa
->ifa_addr
;
1202 namelen
= strlen(new_name
);
1203 onamelen
= sdl
->sdl_nlen
;
1205 * Move the address if needed. This is safe because we
1206 * allocate space for a name of length IFNAMSIZ when we
1207 * create this in if_attach().
1209 if (namelen
!= onamelen
) {
1210 bcopy(sdl
->sdl_data
+ onamelen
,
1211 sdl
->sdl_data
+ namelen
, sdl
->sdl_alen
);
1213 bcopy(new_name
, sdl
->sdl_data
, namelen
);
1214 sdl
->sdl_nlen
= namelen
;
1215 sdl
= (struct sockaddr_dl
*)ifa
->ifa_netmask
;
1216 bzero(sdl
->sdl_data
, onamelen
);
1217 while (namelen
!= 0)
1218 sdl
->sdl_data
[--namelen
] = 0xff;
1219 /* XXX IFA_UNLOCK(ifa) */
1221 EVENTHANDLER_INVOKE(ifnet_attach_event
, ifp
);
1223 /* Announce the return of the interface. */
1224 rt_ifannouncemsg(ifp
, IFAN_ARRIVAL
);
1228 error
= suser_cred(cred
, 0);
1231 ifp
->if_metric
= ifr
->ifr_metric
;
1232 getmicrotime(&ifp
->if_lastchange
);
1236 error
= suser_cred(cred
, 0);
1241 lwkt_serialize_enter(ifp
->if_serializer
);
1242 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1243 lwkt_serialize_exit(ifp
->if_serializer
);
1245 getmicrotime(&ifp
->if_lastchange
);
1250 u_long oldmtu
= ifp
->if_mtu
;
1252 error
= suser_cred(cred
, 0);
1255 if (ifp
->if_ioctl
== NULL
)
1256 return (EOPNOTSUPP
);
1257 if (ifr
->ifr_mtu
< IF_MINMTU
|| ifr
->ifr_mtu
> IF_MAXMTU
)
1259 lwkt_serialize_enter(ifp
->if_serializer
);
1260 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1261 lwkt_serialize_exit(ifp
->if_serializer
);
1263 getmicrotime(&ifp
->if_lastchange
);
1267 * If the link MTU changed, do network layer specific procedure.
1269 if (ifp
->if_mtu
!= oldmtu
) {
1279 error
= suser_cred(cred
, 0);
1283 /* Don't allow group membership on non-multicast interfaces. */
1284 if ((ifp
->if_flags
& IFF_MULTICAST
) == 0)
1287 /* Don't let users screw up protocols' entries. */
1288 if (ifr
->ifr_addr
.sa_family
!= AF_LINK
)
1291 if (cmd
== SIOCADDMULTI
) {
1292 struct ifmultiaddr
*ifma
;
1293 error
= if_addmulti(ifp
, &ifr
->ifr_addr
, &ifma
);
1295 error
= if_delmulti(ifp
, &ifr
->ifr_addr
);
1298 getmicrotime(&ifp
->if_lastchange
);
1301 case SIOCSIFPHYADDR
:
1302 case SIOCDIFPHYADDR
:
1304 case SIOCSIFPHYADDR_IN6
:
1306 case SIOCSLIFPHYADDR
:
1308 case SIOCSIFGENERIC
:
1309 error
= suser_cred(cred
, 0);
1312 if (ifp
->if_ioctl
== 0)
1313 return (EOPNOTSUPP
);
1314 lwkt_serialize_enter(ifp
->if_serializer
);
1315 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1316 lwkt_serialize_exit(ifp
->if_serializer
);
1318 getmicrotime(&ifp
->if_lastchange
);
1322 ifs
= (struct ifstat
*)data
;
1323 ifs
->ascii
[0] = '\0';
1325 case SIOCGIFPSRCADDR
:
1326 case SIOCGIFPDSTADDR
:
1327 case SIOCGLIFPHYADDR
:
1329 case SIOCGIFGENERIC
:
1330 if (ifp
->if_ioctl
== NULL
)
1331 return (EOPNOTSUPP
);
1332 lwkt_serialize_enter(ifp
->if_serializer
);
1333 error
= ifp
->if_ioctl(ifp
, cmd
, data
, cred
);
1334 lwkt_serialize_exit(ifp
->if_serializer
);
1338 error
= suser_cred(cred
, 0);
1341 return if_setlladdr(ifp
,
1342 ifr
->ifr_addr
.sa_data
, ifr
->ifr_addr
.sa_len
);
1345 oif_flags
= ifp
->if_flags
;
1346 if (so
->so_proto
== 0)
1347 return (EOPNOTSUPP
);
1349 error
= so_pru_control(so
, cmd
, data
, ifp
);
1356 case SIOCSIFDSTADDR
:
1358 case SIOCSIFBRDADDR
:
1359 case SIOCSIFNETMASK
:
1360 #if BYTE_ORDER != BIG_ENDIAN
1361 if (ifr
->ifr_addr
.sa_family
== 0 &&
1362 ifr
->ifr_addr
.sa_len
< 16) {
1363 ifr
->ifr_addr
.sa_family
= ifr
->ifr_addr
.sa_len
;
1364 ifr
->ifr_addr
.sa_len
= 16;
1367 if (ifr
->ifr_addr
.sa_len
== 0)
1368 ifr
->ifr_addr
.sa_len
= 16;
1376 case OSIOCGIFDSTADDR
:
1377 cmd
= SIOCGIFDSTADDR
;
1380 case OSIOCGIFBRDADDR
:
1381 cmd
= SIOCGIFBRDADDR
;
1384 case OSIOCGIFNETMASK
:
1385 cmd
= SIOCGIFNETMASK
;
1387 error
= so_pru_control(so
, cmd
, data
, ifp
);
1391 case OSIOCGIFDSTADDR
:
1392 case OSIOCGIFBRDADDR
:
1393 case OSIOCGIFNETMASK
:
1394 *(u_short
*)&ifr
->ifr_addr
= ifr
->ifr_addr
.sa_family
;
1398 #endif /* COMPAT_43 */
1400 if ((oif_flags
^ ifp
->if_flags
) & IFF_UP
) {
1402 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1403 if (ifp
->if_flags
& IFF_UP
) {
1417 * Set/clear promiscuous mode on interface ifp based on the truth value
1418 * of pswitch. The calls are reference counted so that only the first
1419 * "on" request actually has an effect, as does the final "off" request.
1420 * Results are undefined if the "off" and "on" requests are not matched.
1423 ifpromisc(struct ifnet
*ifp
, int pswitch
)
1429 oldflags
= ifp
->if_flags
;
1430 if (ifp
->if_flags
& IFF_PPROMISC
) {
1431 /* Do nothing if device is in permanently promiscuous mode */
1432 ifp
->if_pcount
+= pswitch
? 1 : -1;
1437 * If the device is not configured up, we cannot put it in
1440 if ((ifp
->if_flags
& IFF_UP
) == 0)
1442 if (ifp
->if_pcount
++ != 0)
1444 ifp
->if_flags
|= IFF_PROMISC
;
1445 log(LOG_INFO
, "%s: promiscuous mode enabled\n",
1448 if (--ifp
->if_pcount
> 0)
1450 ifp
->if_flags
&= ~IFF_PROMISC
;
1451 log(LOG_INFO
, "%s: promiscuous mode disabled\n",
1454 ifr
.ifr_flags
= ifp
->if_flags
;
1455 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1456 lwkt_serialize_enter(ifp
->if_serializer
);
1457 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1458 (struct ucred
*)NULL
);
1459 lwkt_serialize_exit(ifp
->if_serializer
);
1463 ifp
->if_flags
= oldflags
;
1468 * Return interface configuration
1469 * of system. List may be used
1470 * in later ioctl's (above) to get
1471 * other information.
1474 ifconf(u_long cmd
, caddr_t data
, struct ucred
*cred
)
1476 struct ifconf
*ifc
= (struct ifconf
*)data
;
1479 struct sockaddr
*sa
;
1480 struct ifreq ifr
, *ifrp
;
1481 int space
= ifc
->ifc_len
, error
= 0;
1483 ifrp
= ifc
->ifc_req
;
1484 TAILQ_FOREACH(ifp
, &ifnet
, if_link
) {
1487 if (space
<= sizeof ifr
)
1491 * Zero the stack declared structure first to prevent
1492 * memory disclosure.
1494 bzero(&ifr
, sizeof(ifr
));
1495 if (strlcpy(ifr
.ifr_name
, ifp
->if_xname
, sizeof(ifr
.ifr_name
))
1496 >= sizeof(ifr
.ifr_name
)) {
1497 error
= ENAMETOOLONG
;
1502 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
1503 if (space
<= sizeof ifr
)
1506 if (cred
->cr_prison
&&
1507 prison_if(cred
, sa
))
1511 if (cmd
== OSIOCGIFCONF
) {
1512 struct osockaddr
*osa
=
1513 (struct osockaddr
*)&ifr
.ifr_addr
;
1515 osa
->sa_family
= sa
->sa_family
;
1516 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1520 if (sa
->sa_len
<= sizeof(*sa
)) {
1522 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1525 if (space
< (sizeof ifr
) + sa
->sa_len
-
1528 space
-= sa
->sa_len
- sizeof(*sa
);
1529 error
= copyout(&ifr
, ifrp
,
1530 sizeof ifr
.ifr_name
);
1532 error
= copyout(sa
, &ifrp
->ifr_addr
,
1534 ifrp
= (struct ifreq
*)
1535 (sa
->sa_len
+ (caddr_t
)&ifrp
->ifr_addr
);
1539 space
-= sizeof ifr
;
1544 bzero(&ifr
.ifr_addr
, sizeof ifr
.ifr_addr
);
1545 error
= copyout(&ifr
, ifrp
, sizeof ifr
);
1548 space
-= sizeof ifr
;
1552 ifc
->ifc_len
-= space
;
1557 * Just like if_promisc(), but for all-multicast-reception mode.
1560 if_allmulti(struct ifnet
*ifp
, int onswitch
)
1568 if (ifp
->if_amcount
++ == 0) {
1569 ifp
->if_flags
|= IFF_ALLMULTI
;
1570 ifr
.ifr_flags
= ifp
->if_flags
;
1571 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1572 lwkt_serialize_enter(ifp
->if_serializer
);
1573 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1574 (struct ucred
*)NULL
);
1575 lwkt_serialize_exit(ifp
->if_serializer
);
1578 if (ifp
->if_amcount
> 1) {
1581 ifp
->if_amcount
= 0;
1582 ifp
->if_flags
&= ~IFF_ALLMULTI
;
1583 ifr
.ifr_flags
= ifp
->if_flags
;
1584 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1585 lwkt_serialize_enter(ifp
->if_serializer
);
1586 error
= ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1587 (struct ucred
*)NULL
);
1588 lwkt_serialize_exit(ifp
->if_serializer
);
1600 * Add a multicast listenership to the interface in question.
1601 * The link layer provides a routine which converts
1605 struct ifnet
*ifp
, /* interface to manipulate */
1606 struct sockaddr
*sa
, /* address to add */
1607 struct ifmultiaddr
**retifma
)
1609 struct sockaddr
*llsa
, *dupsa
;
1611 struct ifmultiaddr
*ifma
;
1614 * If the matching multicast address already exists
1615 * then don't add a new one, just add a reference
1617 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
) {
1618 if (sa_equal(sa
, ifma
->ifma_addr
)) {
1619 ifma
->ifma_refcount
++;
1627 * Give the link layer a chance to accept/reject it, and also
1628 * find out which AF_LINK address this maps to, if it isn't one
1631 if (ifp
->if_resolvemulti
) {
1632 lwkt_serialize_enter(ifp
->if_serializer
);
1633 error
= ifp
->if_resolvemulti(ifp
, &llsa
, sa
);
1634 lwkt_serialize_exit(ifp
->if_serializer
);
1641 MALLOC(ifma
, struct ifmultiaddr
*, sizeof *ifma
, M_IFMADDR
, M_WAITOK
);
1642 MALLOC(dupsa
, struct sockaddr
*, sa
->sa_len
, M_IFMADDR
, M_WAITOK
);
1643 bcopy(sa
, dupsa
, sa
->sa_len
);
1645 ifma
->ifma_addr
= dupsa
;
1646 ifma
->ifma_lladdr
= llsa
;
1647 ifma
->ifma_ifp
= ifp
;
1648 ifma
->ifma_refcount
= 1;
1649 ifma
->ifma_protospec
= 0;
1650 rt_newmaddrmsg(RTM_NEWMADDR
, ifma
);
1653 * Some network interfaces can scan the address list at
1654 * interrupt time; lock them out.
1657 LIST_INSERT_HEAD(&ifp
->if_multiaddrs
, ifma
, ifma_link
);
1662 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
) {
1663 if (sa_equal(ifma
->ifma_addr
, llsa
))
1667 ifma
->ifma_refcount
++;
1669 MALLOC(ifma
, struct ifmultiaddr
*, sizeof *ifma
,
1670 M_IFMADDR
, M_WAITOK
);
1671 MALLOC(dupsa
, struct sockaddr
*, llsa
->sa_len
,
1672 M_IFMADDR
, M_WAITOK
);
1673 bcopy(llsa
, dupsa
, llsa
->sa_len
);
1674 ifma
->ifma_addr
= dupsa
;
1675 ifma
->ifma_ifp
= ifp
;
1676 ifma
->ifma_refcount
= 1;
1678 LIST_INSERT_HEAD(&ifp
->if_multiaddrs
, ifma
, ifma_link
);
1683 * We are certain we have added something, so call down to the
1684 * interface to let them know about it.
1687 lwkt_serialize_enter(ifp
->if_serializer
);
1688 ifp
->if_ioctl(ifp
, SIOCADDMULTI
, 0, (struct ucred
*)NULL
);
1689 lwkt_serialize_exit(ifp
->if_serializer
);
1696 * Remove a reference to a multicast address on this interface. Yell
1697 * if the request does not match an existing membership.
1700 if_delmulti(struct ifnet
*ifp
, struct sockaddr
*sa
)
1702 struct ifmultiaddr
*ifma
;
1704 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1705 if (sa_equal(sa
, ifma
->ifma_addr
))
1710 if (ifma
->ifma_refcount
> 1) {
1711 ifma
->ifma_refcount
--;
1715 rt_newmaddrmsg(RTM_DELMADDR
, ifma
);
1716 sa
= ifma
->ifma_lladdr
;
1718 LIST_REMOVE(ifma
, ifma_link
);
1720 * Make sure the interface driver is notified
1721 * in the case of a link layer mcast group being left.
1723 if (ifma
->ifma_addr
->sa_family
== AF_LINK
&& sa
== 0) {
1724 lwkt_serialize_enter(ifp
->if_serializer
);
1725 ifp
->if_ioctl(ifp
, SIOCDELMULTI
, 0, (struct ucred
*)NULL
);
1726 lwkt_serialize_exit(ifp
->if_serializer
);
1729 kfree(ifma
->ifma_addr
, M_IFMADDR
);
1730 kfree(ifma
, M_IFMADDR
);
1735 * Now look for the link-layer address which corresponds to
1736 * this network address. It had been squirreled away in
1737 * ifma->ifma_lladdr for this purpose (so we don't have
1738 * to call ifp->if_resolvemulti() again), and we saved that
1739 * value in sa above. If some nasty deleted the
1740 * link-layer address out from underneath us, we can deal because
1741 * the address we stored was is not the same as the one which was
1742 * in the record for the link-layer address. (So we don't complain
1745 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1746 if (sa_equal(sa
, ifma
->ifma_addr
))
1751 if (ifma
->ifma_refcount
> 1) {
1752 ifma
->ifma_refcount
--;
1757 lwkt_serialize_enter(ifp
->if_serializer
);
1758 LIST_REMOVE(ifma
, ifma_link
);
1759 ifp
->if_ioctl(ifp
, SIOCDELMULTI
, 0, (struct ucred
*)NULL
);
1760 lwkt_serialize_exit(ifp
->if_serializer
);
1762 kfree(ifma
->ifma_addr
, M_IFMADDR
);
1763 kfree(sa
, M_IFMADDR
);
1764 kfree(ifma
, M_IFMADDR
);
1770 * Set the link layer address on an interface.
1772 * At this time we only support certain types of interfaces,
1773 * and we don't allow the length of the address to change.
1776 if_setlladdr(struct ifnet
*ifp
, const u_char
*lladdr
, int len
)
1778 struct sockaddr_dl
*sdl
;
1782 sdl
= IF_LLSOCKADDR(ifp
);
1785 if (len
!= sdl
->sdl_alen
) /* don't allow length to change */
1787 switch (ifp
->if_type
) {
1788 case IFT_ETHER
: /* these types use struct arpcom */
1793 bcopy(lladdr
, ((struct arpcom
*)ifp
->if_softc
)->ac_enaddr
, len
);
1796 bcopy(lladdr
, LLADDR(sdl
), len
);
1802 * If the interface is already up, we need
1803 * to re-init it in order to reprogram its
1806 lwkt_serialize_enter(ifp
->if_serializer
);
1807 if ((ifp
->if_flags
& IFF_UP
) != 0) {
1808 ifp
->if_flags
&= ~IFF_UP
;
1809 ifr
.ifr_flags
= ifp
->if_flags
;
1810 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1811 ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1812 (struct ucred
*)NULL
);
1813 ifp
->if_flags
|= IFF_UP
;
1814 ifr
.ifr_flags
= ifp
->if_flags
;
1815 ifr
.ifr_flagshigh
= ifp
->if_flags
>> 16;
1816 ifp
->if_ioctl(ifp
, SIOCSIFFLAGS
, (caddr_t
)&ifr
,
1817 (struct ucred
*)NULL
);
1820 * Also send gratuitous ARPs to notify other nodes about
1821 * the address change.
1823 TAILQ_FOREACH(ifa
, &ifp
->if_addrhead
, ifa_link
) {
1824 if (ifa
->ifa_addr
!= NULL
&&
1825 ifa
->ifa_addr
->sa_family
== AF_INET
)
1826 arp_ifinit(ifp
, ifa
);
1830 lwkt_serialize_exit(ifp
->if_serializer
);
1834 struct ifmultiaddr
*
1835 ifmaof_ifpforaddr(struct sockaddr
*sa
, struct ifnet
*ifp
)
1837 struct ifmultiaddr
*ifma
;
1839 LIST_FOREACH(ifma
, &ifp
->if_multiaddrs
, ifma_link
)
1840 if (sa_equal(ifma
->ifma_addr
, sa
))
1847 * The name argument must be a pointer to storage which will last as
1848 * long as the interface does. For physical devices, the result of
1849 * device_get_name(dev) is a good choice and for pseudo-devices a
1850 * static string works well.
1853 if_initname(struct ifnet
*ifp
, const char *name
, int unit
)
1855 ifp
->if_dname
= name
;
1856 ifp
->if_dunit
= unit
;
1857 if (unit
!= IF_DUNIT_NONE
)
1858 snprintf(ifp
->if_xname
, IFNAMSIZ
, "%s%d", name
, unit
);
1860 strlcpy(ifp
->if_xname
, name
, IFNAMSIZ
);
1864 if_printf(struct ifnet
*ifp
, const char *fmt
, ...)
1869 retval
= printf("%s: ", ifp
->if_xname
);
1870 __va_start(ap
, fmt
);
1871 retval
+= vprintf(fmt
, ap
);
1876 SYSCTL_NODE(_net
, PF_LINK
, link
, CTLFLAG_RW
, 0, "Link layers");
1877 SYSCTL_NODE(_net_link
, 0, generic
, CTLFLAG_RW
, 0, "Generic link-management");
1880 ifq_set_classic(struct ifaltq
*ifq
)
1882 ifq
->altq_enqueue
= ifq_classic_enqueue
;
1883 ifq
->altq_dequeue
= ifq_classic_dequeue
;
1884 ifq
->altq_request
= ifq_classic_request
;
1888 ifq_classic_enqueue(struct ifaltq
*ifq
, struct mbuf
*m
,
1889 struct altq_pktattr
*pa __unused
)
1892 if (IF_QFULL(ifq
)) {
1903 static struct mbuf
*
1904 ifq_classic_dequeue(struct ifaltq
*ifq
, struct mbuf
*mpolled
, int op
)
1917 panic("unsupported ALTQ dequeue op: %d", op
);
1920 KKASSERT(mpolled
== NULL
|| mpolled
== m
);
1925 ifq_classic_request(struct ifaltq
*ifq
, int req
, void *arg
)
1933 panic("unspported ALTQ request: %d", req
);