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 1.58 2007/12/29 12:51:17 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/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 <netinet6/in6_var.h>
80 #include <netinet6/in6_ifattach.h>
84 #if defined(COMPAT_43)
85 #include <emulation/43bsd/43bsd_socket.h>
86 #endif /* COMPAT_43 */
89 * Support for non-ALTQ interfaces.
91 static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *,
92 struct altq_pktattr *);
94 ifq_classic_dequeue(struct ifaltq *, struct mbuf *, int);
95 static int ifq_classic_request(struct ifaltq *, int, void *);
98 * System initialization
100 static void if_attachdomain(void *);
101 static void if_attachdomain1(struct ifnet *);
102 static int ifconf(u_long, caddr_t, struct ucred *);
103 static void ifinit(void *);
104 static void if_slowtimo(void *);
105 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
106 static int if_rtdel(struct radix_node *, void *);
110 * XXX: declare here to avoid to include many inet6 related files..
111 * should be more generalized?
113 extern void nd6_setmtu(struct ifnet *);
116 struct if_clone *if_clone_lookup(const char *, int *);
117 int if_clone_list(struct if_clonereq *);
119 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
120 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
122 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
124 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
125 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
126 MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
128 int ifqmaxlen = IFQ_MAXLEN;
129 struct ifnethead ifnet = TAILQ_HEAD_INITIALIZER(ifnet);
131 LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
132 int if_cloners_count;
134 struct callout if_slowtimo_timer;
137 struct ifnet **ifindex2ifnet = NULL;
140 * Network interface utility routines.
142 * Routines with ifa_ifwith* names take sockaddr *'s as
151 callout_init(&if_slowtimo_timer);
154 TAILQ_FOREACH(ifp, &ifnet, if_link) {
155 if (ifp->if_snd.ifq_maxlen == 0) {
156 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
157 ifp->if_snd.ifq_maxlen = ifqmaxlen;
166 * Attach an interface to the list of "active" interfaces.
168 * The serializer is optional. If non-NULL access to the interface
172 if_attach(struct ifnet *ifp, lwkt_serialize_t serializer)
174 unsigned socksize, ifasize;
175 int namelen, masklen;
176 struct sockaddr_dl *sdl;
180 static int if_indexlim = 8;
183 * The serializer can be passed in from the device, allowing the
184 * same serializer to be used for both the interrupt interlock and
185 * the device queue. If not specified, the netif structure will
186 * use an embedded serializer.
188 if (serializer == NULL) {
189 serializer = &ifp->if_default_serializer;
190 lwkt_serialize_init(serializer);
192 ifp->if_serializer = serializer;
194 #ifdef DEVICE_POLLING
195 /* Device is not in polling mode by default */
196 ifp->if_poll_cpuid = -1;
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 (ksnprintf(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)
886 * Default action when installing a route with a Link Level gateway.
887 * Lookup an appropriate real ifa to point to.
888 * This should be moved to /sys/net/link.c eventually.
891 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
894 struct sockaddr *dst;
897 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
898 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
900 ifa = ifaof_ifpforaddr(dst, ifp);
905 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
906 ifa->ifa_rtrequest(cmd, rt, info);
911 * Mark an interface down and notify protocols of
913 * NOTE: must be called at splnet or eqivalent.
916 if_unroute(struct ifnet *ifp, int flag, int fam)
920 ifp->if_flags &= ~flag;
921 getmicrotime(&ifp->if_lastchange);
922 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
923 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
924 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
925 ifq_purge(&ifp->if_snd);
930 * Mark an interface up and notify protocols of
932 * NOTE: must be called at splnet or eqivalent.
935 if_route(struct ifnet *ifp, int flag, int fam)
939 ifp->if_flags |= flag;
940 getmicrotime(&ifp->if_lastchange);
941 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
942 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
943 pfctlinput(PRC_IFUP, ifa->ifa_addr);
951 * Mark an interface down and notify protocols of the transition. An
952 * interface going down is also considered to be a synchronizing event.
953 * We must ensure that all packet processing related to the interface
954 * has completed before we return so e.g. the caller can free the ifnet
955 * structure that the mbufs may be referencing.
957 * NOTE: must be called at splnet or eqivalent.
960 if_down(struct ifnet *ifp)
962 if_unroute(ifp, IFF_UP, AF_UNSPEC);
963 netmsg_service_sync();
967 * Mark an interface up and notify protocols of
969 * NOTE: must be called at splnet or eqivalent.
972 if_up(struct ifnet *ifp)
975 if_route(ifp, IFF_UP, AF_UNSPEC);
979 * Process a link state change.
980 * NOTE: must be called at splsoftnet or equivalent.
983 if_link_state_change(struct ifnet *ifp)
989 * Handle interface watchdog timer routines. Called
990 * from softclock, we decrement timers (if set) and
991 * call the appropriate interface routine on expiration.
994 if_slowtimo(void *arg)
1000 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1001 if (ifp->if_timer == 0 || --ifp->if_timer)
1003 if (ifp->if_watchdog) {
1004 if (lwkt_serialize_try(ifp->if_serializer)) {
1005 (*ifp->if_watchdog)(ifp);
1006 lwkt_serialize_exit(ifp->if_serializer);
1008 /* try again next timeout */
1016 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
1020 * Map interface name to
1021 * interface structure pointer.
1024 ifunit(const char *name)
1029 * Search all the interfaces for this name/number
1032 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1033 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1041 * Map interface name in a sockaddr_dl to
1042 * interface structure pointer.
1045 if_withname(struct sockaddr *sa)
1047 char ifname[IFNAMSIZ+1];
1048 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1050 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1051 (sdl->sdl_nlen > IFNAMSIZ) )
1055 * ifunit wants a null-terminated name. It may not be null-terminated
1056 * in the sockaddr. We don't want to change the caller's sockaddr,
1057 * and there might not be room to put the trailing null anyway, so we
1058 * make a local copy that we know we can null terminate safely.
1061 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1062 ifname[sdl->sdl_nlen] = '\0';
1063 return ifunit(ifname);
1071 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct ucred *cred)
1079 size_t namelen, onamelen;
1080 char new_name[IFNAMSIZ];
1082 struct sockaddr_dl *sdl;
1088 return (ifconf(cmd, data, cred));
1090 ifr = (struct ifreq *)data;
1095 if ((error = suser_cred(cred, 0)) != 0)
1097 return ((cmd == SIOCIFCREATE) ?
1098 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1099 if_clone_destroy(ifr->ifr_name));
1101 case SIOCIFGCLONERS:
1102 return (if_clone_list((struct if_clonereq *)data));
1105 ifp = ifunit(ifr->ifr_name);
1111 ifr->ifr_flags = ifp->if_flags;
1112 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1116 ifr->ifr_reqcap = ifp->if_capabilities;
1117 ifr->ifr_curcap = ifp->if_capenable;
1121 ifr->ifr_metric = ifp->if_metric;
1125 ifr->ifr_mtu = ifp->if_mtu;
1129 ifr->ifr_phys = ifp->if_physical;
1132 case SIOCGIFPOLLCPU:
1133 #ifdef DEVICE_POLLING
1134 ifr->ifr_pollcpu = ifp->if_poll_cpuid;
1136 ifr->ifr_pollcpu = -1;
1140 case SIOCSIFPOLLCPU:
1141 #ifdef DEVICE_POLLING
1142 if ((ifp->if_flags & IFF_POLLING) == 0)
1143 ether_pollcpu_register(ifp, ifr->ifr_pollcpu);
1148 error = suser_cred(cred, 0);
1151 new_flags = (ifr->ifr_flags & 0xffff) |
1152 (ifr->ifr_flagshigh << 16);
1153 if (ifp->if_flags & IFF_SMART) {
1154 /* Smart drivers twiddle their own routes */
1155 } else if (ifp->if_flags & IFF_UP &&
1156 (new_flags & IFF_UP) == 0) {
1160 } else if (new_flags & IFF_UP &&
1161 (ifp->if_flags & IFF_UP) == 0) {
1167 #ifdef DEVICE_POLLING
1168 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1169 if (new_flags & IFF_POLLING) {
1170 ether_poll_register(ifp);
1172 ether_poll_deregister(ifp);
1177 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1178 (new_flags &~ IFF_CANTCHANGE);
1179 if (new_flags & IFF_PPROMISC) {
1180 /* Permanently promiscuous mode requested */
1181 ifp->if_flags |= IFF_PROMISC;
1182 } else if (ifp->if_pcount == 0) {
1183 ifp->if_flags &= ~IFF_PROMISC;
1185 if (ifp->if_ioctl) {
1186 lwkt_serialize_enter(ifp->if_serializer);
1187 ifp->if_ioctl(ifp, cmd, data, cred);
1188 lwkt_serialize_exit(ifp->if_serializer);
1190 getmicrotime(&ifp->if_lastchange);
1194 error = suser_cred(cred, 0);
1197 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1199 lwkt_serialize_enter(ifp->if_serializer);
1200 ifp->if_ioctl(ifp, cmd, data, cred);
1201 lwkt_serialize_exit(ifp->if_serializer);
1205 error = suser_cred(cred, 0);
1208 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1211 if (new_name[0] == '\0')
1213 if (ifunit(new_name) != NULL)
1216 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1218 /* Announce the departure of the interface. */
1219 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1221 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1222 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1223 /* XXX IFA_LOCK(ifa); */
1224 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1225 namelen = strlen(new_name);
1226 onamelen = sdl->sdl_nlen;
1228 * Move the address if needed. This is safe because we
1229 * allocate space for a name of length IFNAMSIZ when we
1230 * create this in if_attach().
1232 if (namelen != onamelen) {
1233 bcopy(sdl->sdl_data + onamelen,
1234 sdl->sdl_data + namelen, sdl->sdl_alen);
1236 bcopy(new_name, sdl->sdl_data, namelen);
1237 sdl->sdl_nlen = namelen;
1238 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1239 bzero(sdl->sdl_data, onamelen);
1240 while (namelen != 0)
1241 sdl->sdl_data[--namelen] = 0xff;
1242 /* XXX IFA_UNLOCK(ifa) */
1244 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1246 /* Announce the return of the interface. */
1247 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1251 error = suser_cred(cred, 0);
1254 ifp->if_metric = ifr->ifr_metric;
1255 getmicrotime(&ifp->if_lastchange);
1259 error = suser_cred(cred, 0);
1264 lwkt_serialize_enter(ifp->if_serializer);
1265 error = ifp->if_ioctl(ifp, cmd, data, cred);
1266 lwkt_serialize_exit(ifp->if_serializer);
1268 getmicrotime(&ifp->if_lastchange);
1273 u_long oldmtu = ifp->if_mtu;
1275 error = suser_cred(cred, 0);
1278 if (ifp->if_ioctl == NULL)
1279 return (EOPNOTSUPP);
1280 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1282 lwkt_serialize_enter(ifp->if_serializer);
1283 error = ifp->if_ioctl(ifp, cmd, data, cred);
1284 lwkt_serialize_exit(ifp->if_serializer);
1286 getmicrotime(&ifp->if_lastchange);
1290 * If the link MTU changed, do network layer specific procedure.
1292 if (ifp->if_mtu != oldmtu) {
1302 error = suser_cred(cred, 0);
1306 /* Don't allow group membership on non-multicast interfaces. */
1307 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1310 /* Don't let users screw up protocols' entries. */
1311 if (ifr->ifr_addr.sa_family != AF_LINK)
1314 if (cmd == SIOCADDMULTI) {
1315 struct ifmultiaddr *ifma;
1316 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1318 error = if_delmulti(ifp, &ifr->ifr_addr);
1321 getmicrotime(&ifp->if_lastchange);
1324 case SIOCSIFPHYADDR:
1325 case SIOCDIFPHYADDR:
1327 case SIOCSIFPHYADDR_IN6:
1329 case SIOCSLIFPHYADDR:
1331 case SIOCSIFGENERIC:
1332 error = suser_cred(cred, 0);
1335 if (ifp->if_ioctl == 0)
1336 return (EOPNOTSUPP);
1337 lwkt_serialize_enter(ifp->if_serializer);
1338 error = ifp->if_ioctl(ifp, cmd, data, cred);
1339 lwkt_serialize_exit(ifp->if_serializer);
1341 getmicrotime(&ifp->if_lastchange);
1345 ifs = (struct ifstat *)data;
1346 ifs->ascii[0] = '\0';
1348 case SIOCGIFPSRCADDR:
1349 case SIOCGIFPDSTADDR:
1350 case SIOCGLIFPHYADDR:
1352 case SIOCGIFGENERIC:
1353 if (ifp->if_ioctl == NULL)
1354 return (EOPNOTSUPP);
1355 lwkt_serialize_enter(ifp->if_serializer);
1356 error = ifp->if_ioctl(ifp, cmd, data, cred);
1357 lwkt_serialize_exit(ifp->if_serializer);
1361 error = suser_cred(cred, 0);
1364 return if_setlladdr(ifp,
1365 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1368 oif_flags = ifp->if_flags;
1369 if (so->so_proto == 0)
1370 return (EOPNOTSUPP);
1372 error = so_pru_control(so, cmd, data, ifp);
1379 case SIOCSIFDSTADDR:
1381 case SIOCSIFBRDADDR:
1382 case SIOCSIFNETMASK:
1383 #if BYTE_ORDER != BIG_ENDIAN
1384 if (ifr->ifr_addr.sa_family == 0 &&
1385 ifr->ifr_addr.sa_len < 16) {
1386 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1387 ifr->ifr_addr.sa_len = 16;
1390 if (ifr->ifr_addr.sa_len == 0)
1391 ifr->ifr_addr.sa_len = 16;
1399 case OSIOCGIFDSTADDR:
1400 cmd = SIOCGIFDSTADDR;
1403 case OSIOCGIFBRDADDR:
1404 cmd = SIOCGIFBRDADDR;
1407 case OSIOCGIFNETMASK:
1408 cmd = SIOCGIFNETMASK;
1410 error = so_pru_control(so, cmd, data, ifp);
1414 case OSIOCGIFDSTADDR:
1415 case OSIOCGIFBRDADDR:
1416 case OSIOCGIFNETMASK:
1417 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1421 #endif /* COMPAT_43 */
1423 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1425 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1426 if (ifp->if_flags & IFF_UP) {
1440 * Set/clear promiscuous mode on interface ifp based on the truth value
1441 * of pswitch. The calls are reference counted so that only the first
1442 * "on" request actually has an effect, as does the final "off" request.
1443 * Results are undefined if the "off" and "on" requests are not matched.
1446 ifpromisc(struct ifnet *ifp, int pswitch)
1452 oldflags = ifp->if_flags;
1453 if (ifp->if_flags & IFF_PPROMISC) {
1454 /* Do nothing if device is in permanently promiscuous mode */
1455 ifp->if_pcount += pswitch ? 1 : -1;
1460 * If the device is not configured up, we cannot put it in
1463 if ((ifp->if_flags & IFF_UP) == 0)
1465 if (ifp->if_pcount++ != 0)
1467 ifp->if_flags |= IFF_PROMISC;
1468 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1471 if (--ifp->if_pcount > 0)
1473 ifp->if_flags &= ~IFF_PROMISC;
1474 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1477 ifr.ifr_flags = ifp->if_flags;
1478 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1479 lwkt_serialize_enter(ifp->if_serializer);
1480 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1481 (struct ucred *)NULL);
1482 lwkt_serialize_exit(ifp->if_serializer);
1486 ifp->if_flags = oldflags;
1491 * Return interface configuration
1492 * of system. List may be used
1493 * in later ioctl's (above) to get
1494 * other information.
1497 ifconf(u_long cmd, caddr_t data, struct ucred *cred)
1499 struct ifconf *ifc = (struct ifconf *)data;
1502 struct sockaddr *sa;
1503 struct ifreq ifr, *ifrp;
1504 int space = ifc->ifc_len, error = 0;
1506 ifrp = ifc->ifc_req;
1507 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1510 if (space <= sizeof ifr)
1514 * Zero the stack declared structure first to prevent
1515 * memory disclosure.
1517 bzero(&ifr, sizeof(ifr));
1518 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1519 >= sizeof(ifr.ifr_name)) {
1520 error = ENAMETOOLONG;
1525 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1526 if (space <= sizeof ifr)
1529 if (cred->cr_prison &&
1530 prison_if(cred, sa))
1534 if (cmd == OSIOCGIFCONF) {
1535 struct osockaddr *osa =
1536 (struct osockaddr *)&ifr.ifr_addr;
1538 osa->sa_family = sa->sa_family;
1539 error = copyout(&ifr, ifrp, sizeof ifr);
1543 if (sa->sa_len <= sizeof(*sa)) {
1545 error = copyout(&ifr, ifrp, sizeof ifr);
1548 if (space < (sizeof ifr) + sa->sa_len -
1551 space -= sa->sa_len - sizeof(*sa);
1552 error = copyout(&ifr, ifrp,
1553 sizeof ifr.ifr_name);
1555 error = copyout(sa, &ifrp->ifr_addr,
1557 ifrp = (struct ifreq *)
1558 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1562 space -= sizeof ifr;
1567 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1568 error = copyout(&ifr, ifrp, sizeof ifr);
1571 space -= sizeof ifr;
1575 ifc->ifc_len -= space;
1580 * Just like if_promisc(), but for all-multicast-reception mode.
1583 if_allmulti(struct ifnet *ifp, int onswitch)
1591 if (ifp->if_amcount++ == 0) {
1592 ifp->if_flags |= IFF_ALLMULTI;
1593 ifr.ifr_flags = ifp->if_flags;
1594 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1595 lwkt_serialize_enter(ifp->if_serializer);
1596 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1597 (struct ucred *)NULL);
1598 lwkt_serialize_exit(ifp->if_serializer);
1601 if (ifp->if_amcount > 1) {
1604 ifp->if_amcount = 0;
1605 ifp->if_flags &= ~IFF_ALLMULTI;
1606 ifr.ifr_flags = ifp->if_flags;
1607 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1608 lwkt_serialize_enter(ifp->if_serializer);
1609 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1610 (struct ucred *)NULL);
1611 lwkt_serialize_exit(ifp->if_serializer);
1623 * Add a multicast listenership to the interface in question.
1624 * The link layer provides a routine which converts
1628 struct ifnet *ifp, /* interface to manipulate */
1629 struct sockaddr *sa, /* address to add */
1630 struct ifmultiaddr **retifma)
1632 struct sockaddr *llsa, *dupsa;
1634 struct ifmultiaddr *ifma;
1637 * If the matching multicast address already exists
1638 * then don't add a new one, just add a reference
1640 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1641 if (sa_equal(sa, ifma->ifma_addr)) {
1642 ifma->ifma_refcount++;
1650 * Give the link layer a chance to accept/reject it, and also
1651 * find out which AF_LINK address this maps to, if it isn't one
1654 if (ifp->if_resolvemulti) {
1655 lwkt_serialize_enter(ifp->if_serializer);
1656 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1657 lwkt_serialize_exit(ifp->if_serializer);
1664 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1665 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1666 bcopy(sa, dupsa, sa->sa_len);
1668 ifma->ifma_addr = dupsa;
1669 ifma->ifma_lladdr = llsa;
1670 ifma->ifma_ifp = ifp;
1671 ifma->ifma_refcount = 1;
1672 ifma->ifma_protospec = 0;
1673 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1676 * Some network interfaces can scan the address list at
1677 * interrupt time; lock them out.
1680 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1685 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1686 if (sa_equal(ifma->ifma_addr, llsa))
1690 ifma->ifma_refcount++;
1692 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1693 M_IFMADDR, M_WAITOK);
1694 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1695 M_IFMADDR, M_WAITOK);
1696 bcopy(llsa, dupsa, llsa->sa_len);
1697 ifma->ifma_addr = dupsa;
1698 ifma->ifma_ifp = ifp;
1699 ifma->ifma_refcount = 1;
1701 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1706 * We are certain we have added something, so call down to the
1707 * interface to let them know about it.
1710 lwkt_serialize_enter(ifp->if_serializer);
1711 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
1712 lwkt_serialize_exit(ifp->if_serializer);
1719 * Remove a reference to a multicast address on this interface. Yell
1720 * if the request does not match an existing membership.
1723 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
1725 struct ifmultiaddr *ifma;
1727 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1728 if (sa_equal(sa, ifma->ifma_addr))
1733 if (ifma->ifma_refcount > 1) {
1734 ifma->ifma_refcount--;
1738 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1739 sa = ifma->ifma_lladdr;
1741 LIST_REMOVE(ifma, ifma_link);
1743 * Make sure the interface driver is notified
1744 * in the case of a link layer mcast group being left.
1746 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) {
1747 lwkt_serialize_enter(ifp->if_serializer);
1748 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
1749 lwkt_serialize_exit(ifp->if_serializer);
1752 kfree(ifma->ifma_addr, M_IFMADDR);
1753 kfree(ifma, M_IFMADDR);
1758 * Now look for the link-layer address which corresponds to
1759 * this network address. It had been squirreled away in
1760 * ifma->ifma_lladdr for this purpose (so we don't have
1761 * to call ifp->if_resolvemulti() again), and we saved that
1762 * value in sa above. If some nasty deleted the
1763 * link-layer address out from underneath us, we can deal because
1764 * the address we stored was is not the same as the one which was
1765 * in the record for the link-layer address. (So we don't complain
1768 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1769 if (sa_equal(sa, ifma->ifma_addr))
1774 if (ifma->ifma_refcount > 1) {
1775 ifma->ifma_refcount--;
1780 lwkt_serialize_enter(ifp->if_serializer);
1781 LIST_REMOVE(ifma, ifma_link);
1782 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
1783 lwkt_serialize_exit(ifp->if_serializer);
1785 kfree(ifma->ifma_addr, M_IFMADDR);
1786 kfree(sa, M_IFMADDR);
1787 kfree(ifma, M_IFMADDR);
1793 * Set the link layer address on an interface.
1795 * At this time we only support certain types of interfaces,
1796 * and we don't allow the length of the address to change.
1799 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1801 struct sockaddr_dl *sdl;
1805 sdl = IF_LLSOCKADDR(ifp);
1808 if (len != sdl->sdl_alen) /* don't allow length to change */
1810 switch (ifp->if_type) {
1811 case IFT_ETHER: /* these types use struct arpcom */
1814 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1815 bcopy(lladdr, LLADDR(sdl), len);
1821 * If the interface is already up, we need
1822 * to re-init it in order to reprogram its
1825 lwkt_serialize_enter(ifp->if_serializer);
1826 if ((ifp->if_flags & IFF_UP) != 0) {
1827 ifp->if_flags &= ~IFF_UP;
1828 ifr.ifr_flags = ifp->if_flags;
1829 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1830 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1831 (struct ucred *)NULL);
1832 ifp->if_flags |= IFF_UP;
1833 ifr.ifr_flags = ifp->if_flags;
1834 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1835 ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1836 (struct ucred *)NULL);
1839 * Also send gratuitous ARPs to notify other nodes about
1840 * the address change.
1842 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1843 if (ifa->ifa_addr != NULL &&
1844 ifa->ifa_addr->sa_family == AF_INET)
1845 arp_ifinit(ifp, ifa);
1849 lwkt_serialize_exit(ifp->if_serializer);
1853 struct ifmultiaddr *
1854 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
1856 struct ifmultiaddr *ifma;
1858 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1859 if (sa_equal(ifma->ifma_addr, sa))
1866 * This function locates the first real ethernet MAC from a network
1867 * card and loads it into node, returning 0 on success or ENOENT if
1868 * no suitable interfaces were found. It is used by the uuid code to
1869 * generate a unique 6-byte number.
1872 if_getanyethermac(uint16_t *node, int minlen)
1875 struct sockaddr_dl *sdl;
1877 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1878 if (ifp->if_type != IFT_ETHER)
1880 sdl = IF_LLSOCKADDR(ifp);
1881 if (sdl->sdl_alen < minlen)
1883 bcopy(((struct arpcom *)ifp->if_softc)->ac_enaddr, node,
1891 * The name argument must be a pointer to storage which will last as
1892 * long as the interface does. For physical devices, the result of
1893 * device_get_name(dev) is a good choice and for pseudo-devices a
1894 * static string works well.
1897 if_initname(struct ifnet *ifp, const char *name, int unit)
1899 ifp->if_dname = name;
1900 ifp->if_dunit = unit;
1901 if (unit != IF_DUNIT_NONE)
1902 ksnprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1904 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1908 if_printf(struct ifnet *ifp, const char *fmt, ...)
1913 retval = kprintf("%s: ", ifp->if_xname);
1914 __va_start(ap, fmt);
1915 retval += kvprintf(fmt, ap);
1921 ifq_set_classic(struct ifaltq *ifq)
1923 ifq->altq_enqueue = ifq_classic_enqueue;
1924 ifq->altq_dequeue = ifq_classic_dequeue;
1925 ifq->altq_request = ifq_classic_request;
1929 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1930 struct altq_pktattr *pa __unused)
1933 if (IF_QFULL(ifq)) {
1944 static struct mbuf *
1945 ifq_classic_dequeue(struct ifaltq *ifq, struct mbuf *mpolled, int op)
1958 panic("unsupported ALTQ dequeue op: %d", op);
1961 KKASSERT(mpolled == NULL || mpolled == m);
1966 ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1974 panic("unsupported ALTQ request: %d", req);