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);