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 1.35 2005/05/25 01:44:16 dillon Exp $
38 #include "opt_compat.h"
39 #include "opt_inet6.h"
42 #include <sys/param.h>
43 #include <sys/malloc.h>
45 #include <sys/systm.h>
47 #include <sys/protosw.h>
48 #include <sys/socket.h>
49 #include <sys/socketvar.h>
50 #include <sys/socketops.h>
51 #include <sys/protosw.h>
52 #include <sys/kernel.h>
53 #include <sys/sockio.h>
54 #include <sys/syslog.h>
55 #include <sys/sysctl.h>
56 #include <sys/domain.h>
57 #include <sys/thread.h>
60 #include <net/if_arp.h>
61 #include <net/if_dl.h>
62 #include <net/if_types.h>
63 #include <net/if_var.h>
64 #include <net/ifq_var.h>
65 #include <net/radix.h>
66 #include <net/route.h>
67 #include <machine/stdarg.h>
69 #include <sys/thread2.h>
71 #if defined(INET) || defined(INET6)
73 #include <netinet/in.h>
74 #include <netinet/in_var.h>
75 #include <netinet/if_ether.h>
77 #include <machine/clock.h> /* XXX: temporal workaround for fxp issue */
78 #include <netinet6/in6_var.h>
79 #include <netinet6/in6_ifattach.h>
83 #if defined(COMPAT_43)
84 #include <emulation/43bsd/43bsd_socket.h>
85 #endif /* COMPAT_43 */
88 * Support for non-ALTQ interfaces.
90 static int ifq_classic_enqueue(struct ifaltq *, struct mbuf *,
91 struct altq_pktattr *);
93 ifq_classic_dequeue(struct ifaltq *, int);
94 static int ifq_classic_request(struct ifaltq *, int, void *);
97 * System initialization
100 static void if_attachdomain(void *);
101 static void if_attachdomain1(struct ifnet *);
102 static int ifconf (u_long, caddr_t, struct thread *);
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 *);
108 SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL)
110 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
111 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
112 MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework");
114 int ifqmaxlen = IFQ_MAXLEN;
115 struct ifnethead ifnet; /* depend on static init XXX */
119 * XXX: declare here to avoid to include many inet6 related files..
120 * should be more generalized?
122 extern void nd6_setmtu (struct ifnet *);
125 struct if_clone *if_clone_lookup (const char *, int *);
126 int if_clone_list (struct if_clonereq *);
128 LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners);
129 int if_cloners_count;
131 struct callout if_slowtimo_timer;
134 * Network interface utility routines.
136 * Routines with ifa_ifwith* names take sockaddr *'s as
146 callout_init(&if_slowtimo_timer);
149 TAILQ_FOREACH(ifp, &ifnet, if_link) {
150 if (ifp->if_snd.ifq_maxlen == 0) {
151 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
152 ifp->if_snd.ifq_maxlen = ifqmaxlen;
161 struct ifaddr **ifnet_addrs;
162 struct ifnet **ifindex2ifnet = NULL;
165 * Attach an interface to the
166 * list of "active" interfaces.
169 if_attach(struct ifnet *ifp)
171 unsigned socksize, ifasize;
172 int namelen, masklen;
173 struct sockaddr_dl *sdl;
177 static int if_indexlim = 8;
178 static boolean_t inited;
185 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
186 ifp->if_index = ++if_index;
189 * The old code would work if the interface passed a pre-existing
190 * chain of ifaddrs to this code. We don't trust our callers to
191 * properly initialize the tailq, however, so we no longer allow
192 * this unlikely case.
194 TAILQ_INIT(&ifp->if_addrhead);
195 TAILQ_INIT(&ifp->if_prefixhead);
196 LIST_INIT(&ifp->if_multiaddrs);
197 getmicrotime(&ifp->if_lastchange);
198 if (ifnet_addrs == NULL || if_index >= if_indexlim) {
203 n = if_indexlim * sizeof(struct ifaddr *);
204 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
205 if (ifnet_addrs != NULL) {
206 bcopy(ifnet_addrs, q, n/2);
207 free(ifnet_addrs, M_IFADDR);
209 ifnet_addrs = (struct ifaddr **)q;
211 /* grow ifindex2ifnet */
212 n = if_indexlim * sizeof(struct ifnet *);
213 q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO);
215 bcopy(ifindex2ifnet, q, n/2);
216 free(ifindex2ifnet, M_IFADDR);
218 ifindex2ifnet = (struct ifnet **)q;
221 ifindex2ifnet[if_index] = ifp;
224 * create a Link Level name for this device
226 namelen = strlen(ifp->if_xname);
227 #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m))
228 masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen;
229 socksize = masklen + ifp->if_addrlen;
230 #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1)))
231 if (socksize < sizeof(*sdl))
232 socksize = sizeof(*sdl);
233 socksize = ROUNDUP(socksize);
234 ifasize = sizeof(struct ifaddr) + 2 * socksize;
235 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
236 sdl = (struct sockaddr_dl *)(ifa + 1);
237 sdl->sdl_len = socksize;
238 sdl->sdl_family = AF_LINK;
239 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
240 sdl->sdl_nlen = namelen;
241 sdl->sdl_index = ifp->if_index;
242 sdl->sdl_type = ifp->if_type;
243 ifnet_addrs[if_index - 1] = ifa;
245 ifa->ifa_rtrequest = link_rtrequest;
246 ifa->ifa_addr = (struct sockaddr *)sdl;
247 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
248 ifa->ifa_netmask = (struct sockaddr *)sdl;
249 sdl->sdl_len = masklen;
251 sdl->sdl_data[--namelen] = 0xff;
252 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
254 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
258 ifq->altq_disc = NULL;
259 ifq->altq_flags &= ALTQF_CANTCHANGE;
260 ifq->altq_tbr = NULL;
262 ifq_set_classic(ifq);
264 if (!SLIST_EMPTY(&domains))
265 if_attachdomain1(ifp);
267 /* Announce the interface. */
268 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
272 if_attachdomain(void *dummy)
278 for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list))
279 if_attachdomain1(ifp);
282 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST,
283 if_attachdomain, NULL);
286 if_attachdomain1(struct ifnet *ifp)
293 /* address family dependent data region */
294 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
295 SLIST_FOREACH(dp, &domains, dom_next)
296 if (dp->dom_ifattach)
297 ifp->if_afdata[dp->dom_family] =
298 (*dp->dom_ifattach)(ifp);
303 * Detach an interface, removing it from the
304 * list of "active" interfaces.
307 if_detach(struct ifnet *ifp)
310 struct radix_node_head *rnh;
315 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
318 * Remove routes and flush queues.
321 if (ifp->if_flags & IFF_POLLING)
322 ether_poll_deregister(ifp);
325 if (ifq_is_enabled(&ifp->if_snd))
326 altq_disable(&ifp->if_snd);
327 if (ifq_is_attached(&ifp->if_snd))
328 altq_detach(&ifp->if_snd);
331 * Remove address from ifnet_addrs[] and maybe decrement if_index.
332 * Clean up all addresses.
334 ifnet_addrs[ifp->if_index - 1] = 0;
335 while (if_index > 0 && ifnet_addrs[if_index - 1] == 0)
338 for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa;
339 ifa = TAILQ_FIRST(&ifp->if_addrhead)) {
341 /* XXX: Ugly!! ad hoc just for INET */
342 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
343 struct ifaliasreq ifr;
345 bzero(&ifr, sizeof ifr);
346 ifr.ifra_addr = *ifa->ifa_addr;
347 if (ifa->ifa_dstaddr)
348 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
349 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
355 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
357 /* ifp_addrhead is already updated */
361 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
367 * Remove all IPv6 kernel structs related to ifp. This should be done
368 * before removing routing entries below, since IPv6 interface direct
369 * routes are expected to be removed by the IPv6-specific kernel API.
370 * Otherwise, the kernel will detect some inconsistency and bark it.
376 * Delete all remaining routes using this interface
377 * Unfortuneatly the only way to do this is to slog through
378 * the entire routing table looking for routes which point
379 * to this interface...oh well...
381 for (i = 1; i <= AF_MAX; i++) {
382 if ((rnh = rt_tables[i]) == NULL)
384 rnh->rnh_walktree(rnh, if_rtdel, ifp);
387 /* Announce that the interface is gone. */
388 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
390 SLIST_FOREACH(dp, &domains, dom_next)
391 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
392 (*dp->dom_ifdetach)(ifp,
393 ifp->if_afdata[dp->dom_family]);
395 ifindex2ifnet[ifp->if_index] = NULL;
397 TAILQ_REMOVE(&ifnet, ifp, if_link);
402 * Delete Routes for a Network Interface
404 * Called for each routing entry via the rnh->rnh_walktree() call above
405 * to delete all route entries referencing a detaching network interface.
408 * rn pointer to node in the routing table
409 * arg argument passed to rnh->rnh_walktree() - detaching interface
413 * errno failed - reason indicated
417 if_rtdel(struct radix_node *rn, void *arg)
419 struct rtentry *rt = (struct rtentry *)rn;
420 struct ifnet *ifp = arg;
423 if (rt->rt_ifp == ifp) {
426 * Protect (sorta) against walktree recursion problems
429 if (!(rt->rt_flags & RTF_UP))
432 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
433 rt_mask(rt), rt->rt_flags,
434 (struct rtentry **) NULL);
436 log(LOG_WARNING, "if_rtdel: error %d\n", err);
444 * Create a clone network interface.
447 if_clone_create(char *name, int len)
449 struct if_clone *ifc;
451 int wildcard, bytoff, bitoff;
455 ifc = if_clone_lookup(name, &unit);
459 if (ifunit(name) != NULL)
463 wildcard = (unit < 0);
465 * Find a free unit if none was given.
468 while (bytoff < ifc->ifc_bmlen &&
469 ifc->ifc_units[bytoff] == 0xff)
471 if (bytoff >= ifc->ifc_bmlen)
473 while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0)
475 unit = (bytoff << 3) + bitoff;
478 if (unit > ifc->ifc_maxunit)
481 err = (*ifc->ifc_create)(ifc, unit);
487 bitoff = unit - (bytoff << 3);
491 * Allocate the unit in the bitmap.
493 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0,
494 ("%s: bit is already set", __func__));
495 ifc->ifc_units[bytoff] |= (1 << bitoff);
497 /* In the wildcard case, we need to update the name. */
499 for (dp = name; *dp != '\0'; dp++);
500 if (snprintf(dp, len - (dp-name), "%d", unit) >
501 len - (dp-name) - 1) {
503 * This can only be a programmer error and
504 * there's no straightforward way to recover if
507 panic("if_clone_create(): interface name too long");
512 EVENTHANDLER_INVOKE(if_clone_event, ifc);
518 * Destroy a clone network interface.
521 if_clone_destroy(const char *name)
523 struct if_clone *ifc;
528 ifc = if_clone_lookup(name, &unit);
532 if (unit < ifc->ifc_minifs)
539 if (ifc->ifc_destroy == NULL)
542 (*ifc->ifc_destroy)(ifp);
545 * Compute offset in the bitmap and deallocate the unit.
548 bitoff = unit - (bytoff << 3);
549 KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0,
550 ("%s: bit is already cleared", __func__));
551 ifc->ifc_units[bytoff] &= ~(1 << bitoff);
556 * Look up a network interface cloner.
559 if_clone_lookup(const char *name, int *unitp)
561 struct if_clone *ifc;
565 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) {
566 for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) {
567 if (ifc->ifc_name[i] != *cp)
572 ifc = LIST_NEXT(ifc, ifc_list);
576 return ((struct if_clone *)NULL);
582 for (i = 0; *cp != '\0'; cp++) {
583 if (*cp < '0' || *cp > '9') {
584 /* Bogus unit number. */
587 i = (i * 10) + (*cp - '0');
597 * Register a network interface cloner.
600 if_clone_attach(struct if_clone *ifc)
607 KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit,
608 ("%s: %s requested more units then allowed (%d > %d)",
609 __func__, ifc->ifc_name, ifc->ifc_minifs,
610 ifc->ifc_maxunit + 1));
612 * Compute bitmap size and allocate it.
614 maxclone = ifc->ifc_maxunit + 1;
616 if ((len << 3) < maxclone)
618 ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO);
619 ifc->ifc_bmlen = len;
621 LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list);
624 for (unit = 0; unit < ifc->ifc_minifs; unit++) {
625 err = (*ifc->ifc_create)(ifc, unit);
627 ("%s: failed to create required interface %s%d",
628 __func__, ifc->ifc_name, unit));
630 /* Allocate the unit in the bitmap. */
632 bitoff = unit - (bytoff << 3);
633 ifc->ifc_units[bytoff] |= (1 << bitoff);
638 * Unregister a network interface cloner.
641 if_clone_detach(struct if_clone *ifc)
644 LIST_REMOVE(ifc, ifc_list);
645 free(ifc->ifc_units, M_CLONE);
650 * Provide list of interface cloners to userspace.
653 if_clone_list(struct if_clonereq *ifcr)
655 char outbuf[IFNAMSIZ], *dst;
656 struct if_clone *ifc;
657 int count, error = 0;
659 ifcr->ifcr_total = if_cloners_count;
660 if ((dst = ifcr->ifcr_buffer) == NULL) {
661 /* Just asking how many there are. */
665 if (ifcr->ifcr_count < 0)
668 count = (if_cloners_count < ifcr->ifcr_count) ?
669 if_cloners_count : ifcr->ifcr_count;
671 for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0;
672 ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) {
673 strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ);
674 error = copyout(outbuf, dst, IFNAMSIZ);
683 * Locate an interface based on a complete address.
686 ifa_ifwithaddr(struct sockaddr *addr)
691 TAILQ_FOREACH(ifp, &ifnet, if_link)
692 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
693 if (ifa->ifa_addr->sa_family != addr->sa_family)
695 if (sa_equal(addr, ifa->ifa_addr))
697 if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr &&
698 /* IPv6 doesn't have broadcast */
699 ifa->ifa_broadaddr->sa_len != 0 &&
700 sa_equal(ifa->ifa_broadaddr, addr))
703 return ((struct ifaddr *)NULL);
706 * Locate the point to point interface with a given destination address.
709 ifa_ifwithdstaddr(struct sockaddr *addr)
714 TAILQ_FOREACH(ifp, &ifnet, if_link)
715 if (ifp->if_flags & IFF_POINTOPOINT)
716 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
717 if (ifa->ifa_addr->sa_family != addr->sa_family)
719 if (ifa->ifa_dstaddr &&
720 sa_equal(addr, ifa->ifa_dstaddr))
723 return ((struct ifaddr *)NULL);
727 * Find an interface on a specific network. If many, choice
728 * is most specific found.
731 ifa_ifwithnet(struct sockaddr *addr)
735 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
736 u_int af = addr->sa_family;
737 char *addr_data = addr->sa_data, *cplim;
740 * AF_LINK addresses can be looked up directly by their index number,
741 * so do that if we can.
744 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
746 if (sdl->sdl_index && sdl->sdl_index <= if_index)
747 return (ifnet_addrs[sdl->sdl_index - 1]);
751 * Scan though each interface, looking for ones that have
752 * addresses in this address family.
754 TAILQ_FOREACH(ifp, &ifnet, if_link) {
755 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
756 char *cp, *cp2, *cp3;
758 if (ifa->ifa_addr->sa_family != af)
760 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
762 * This is a bit broken as it doesn't
763 * take into account that the remote end may
764 * be a single node in the network we are
766 * The trouble is that we don't know the
767 * netmask for the remote end.
769 if (ifa->ifa_dstaddr != NULL &&
770 sa_equal(addr, ifa->ifa_dstaddr))
774 * if we have a special address handler,
775 * then use it instead of the generic one.
777 if (ifa->ifa_claim_addr) {
778 if ((*ifa->ifa_claim_addr)(ifa, addr)) {
786 * Scan all the bits in the ifa's address.
787 * If a bit dissagrees with what we are
788 * looking for, mask it with the netmask
789 * to see if it really matters.
792 if (ifa->ifa_netmask == 0)
795 cp2 = ifa->ifa_addr->sa_data;
796 cp3 = ifa->ifa_netmask->sa_data;
797 cplim = ifa->ifa_netmask->sa_len +
798 (char *)ifa->ifa_netmask;
800 if ((*cp++ ^ *cp2++) & *cp3++)
801 goto next; /* next address! */
803 * If the netmask of what we just found
804 * is more specific than what we had before
805 * (if we had one) then remember the new one
806 * before continuing to search
807 * for an even better one.
809 if (ifa_maybe == 0 ||
810 rn_refines((char *)ifa->ifa_netmask,
811 (char *)ifa_maybe->ifa_netmask))
820 * Find an interface address specific to an interface best matching
824 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
827 char *cp, *cp2, *cp3;
829 struct ifaddr *ifa_maybe = 0;
830 u_int af = addr->sa_family;
834 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
835 if (ifa->ifa_addr->sa_family != af)
839 if (ifa->ifa_netmask == NULL) {
840 if (sa_equal(addr, ifa->ifa_addr) ||
841 (ifa->ifa_dstaddr != NULL &&
842 sa_equal(addr, ifa->ifa_dstaddr)))
846 if (ifp->if_flags & IFF_POINTOPOINT) {
847 if (sa_equal(addr, ifa->ifa_dstaddr))
851 cp2 = ifa->ifa_addr->sa_data;
852 cp3 = ifa->ifa_netmask->sa_data;
853 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
854 for (; cp3 < cplim; cp3++)
855 if ((*cp++ ^ *cp2++) & *cp3)
864 #include <net/route.h>
867 * Default action when installing a route with a Link Level gateway.
868 * Lookup an appropriate real ifa to point to.
869 * This should be moved to /sys/net/link.c eventually.
872 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
875 struct sockaddr *dst;
878 if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL ||
879 (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL)
881 ifa = ifaof_ifpforaddr(dst, ifp);
886 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
887 ifa->ifa_rtrequest(cmd, rt, info);
892 * Mark an interface down and notify protocols of
894 * NOTE: must be called at splnet or eqivalent.
897 if_unroute(struct ifnet *ifp, int flag, int fam)
901 ifp->if_flags &= ~flag;
902 getmicrotime(&ifp->if_lastchange);
903 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
904 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
905 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
906 ifq_purge(&ifp->if_snd);
911 * Mark an interface up and notify protocols of
913 * NOTE: must be called at splnet or eqivalent.
916 if_route(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_IFUP, ifa->ifa_addr);
932 * Mark an interface down and notify protocols of the transition. An
933 * interface going down is also considered to be a synchronizing event.
934 * We must ensure that all packet processing related to the interface
935 * has completed before we return so e.g. the caller can free the ifnet
936 * structure that the mbufs may be referencing.
938 * NOTE: must be called at splnet or eqivalent.
941 if_down(struct ifnet *ifp)
943 if_unroute(ifp, IFF_UP, AF_UNSPEC);
944 netmsg_service_sync();
948 * Mark an interface up and notify protocols of
950 * NOTE: must be called at splnet or eqivalent.
953 if_up(struct ifnet *ifp)
956 if_route(ifp, IFF_UP, AF_UNSPEC);
960 * Handle interface watchdog timer routines. Called
961 * from softclock, we decrement timers (if set) and
962 * call the appropriate interface routine on expiration.
965 if_slowtimo(void *arg)
970 TAILQ_FOREACH(ifp, &ifnet, if_link) {
971 if (ifp->if_timer == 0 || --ifp->if_timer)
973 if (ifp->if_watchdog)
974 (*ifp->if_watchdog)(ifp);
977 callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL);
981 * Map interface name to
982 * interface structure pointer.
985 ifunit(const char *name)
990 * Search all the interfaces for this name/number
993 TAILQ_FOREACH(ifp, &ifnet, if_link) {
994 if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0)
1002 * Map interface name in a sockaddr_dl to
1003 * interface structure pointer.
1006 if_withname(struct sockaddr *sa)
1008 char ifname[IFNAMSIZ+1];
1009 struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
1011 if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) ||
1012 (sdl->sdl_nlen > IFNAMSIZ) )
1016 * ifunit wants a null-terminated name. It may not be null-terminated
1017 * in the sockaddr. We don't want to change the caller's sockaddr,
1018 * and there might not be room to put the trailing null anyway, so we
1019 * make a local copy that we know we can null terminate safely.
1022 bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen);
1023 ifname[sdl->sdl_nlen] = '\0';
1024 return ifunit(ifname);
1032 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
1040 size_t namelen, onamelen;
1041 char new_name[IFNAMSIZ];
1043 struct sockaddr_dl *sdl;
1049 return (ifconf(cmd, data, td));
1051 ifr = (struct ifreq *)data;
1056 if ((error = suser(td)) != 0)
1058 return ((cmd == SIOCIFCREATE) ?
1059 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1060 if_clone_destroy(ifr->ifr_name));
1062 case SIOCIFGCLONERS:
1063 return (if_clone_list((struct if_clonereq *)data));
1066 ifp = ifunit(ifr->ifr_name);
1072 ifr->ifr_flags = ifp->if_flags;
1073 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1077 ifr->ifr_reqcap = ifp->if_capabilities;
1078 ifr->ifr_curcap = ifp->if_capenable;
1082 ifr->ifr_metric = ifp->if_metric;
1086 ifr->ifr_mtu = ifp->if_mtu;
1090 ifr->ifr_phys = ifp->if_physical;
1097 new_flags = (ifr->ifr_flags & 0xffff) |
1098 (ifr->ifr_flagshigh << 16);
1099 if (ifp->if_flags & IFF_SMART) {
1100 /* Smart drivers twiddle their own routes */
1101 } else if (ifp->if_flags & IFF_UP &&
1102 (new_flags & IFF_UP) == 0) {
1106 } else if (new_flags & IFF_UP &&
1107 (ifp->if_flags & IFF_UP) == 0) {
1113 #ifdef DEVICE_POLLING
1114 if ((new_flags ^ ifp->if_flags) & IFF_POLLING) {
1115 if (new_flags & IFF_POLLING) {
1116 ether_poll_register(ifp);
1118 ether_poll_deregister(ifp);
1123 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1124 (new_flags &~ IFF_CANTCHANGE);
1125 if (new_flags & IFF_PPROMISC) {
1126 /* Permanently promiscuous mode requested */
1127 ifp->if_flags |= IFF_PROMISC;
1128 } else if (ifp->if_pcount == 0) {
1129 ifp->if_flags &= ~IFF_PROMISC;
1132 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
1133 getmicrotime(&ifp->if_lastchange);
1140 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1142 (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
1149 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1152 if (new_name[0] == '\0')
1154 if (ifunit(new_name) != NULL)
1157 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
1159 /* Announce the departure of the interface. */
1160 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1162 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1163 ifa = TAILQ_FIRST(&ifp->if_addrhead);
1164 /* XXX IFA_LOCK(ifa); */
1165 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1166 namelen = strlen(new_name);
1167 onamelen = sdl->sdl_nlen;
1169 * Move the address if needed. This is safe because we
1170 * allocate space for a name of length IFNAMSIZ when we
1171 * create this in if_attach().
1173 if (namelen != onamelen) {
1174 bcopy(sdl->sdl_data + onamelen,
1175 sdl->sdl_data + namelen, sdl->sdl_alen);
1177 bcopy(new_name, sdl->sdl_data, namelen);
1178 sdl->sdl_nlen = namelen;
1179 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1180 bzero(sdl->sdl_data, onamelen);
1181 while (namelen != 0)
1182 sdl->sdl_data[--namelen] = 0xff;
1183 /* XXX IFA_UNLOCK(ifa) */
1185 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
1187 /* Announce the return of the interface. */
1188 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1195 ifp->if_metric = ifr->ifr_metric;
1196 getmicrotime(&ifp->if_lastchange);
1205 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
1207 getmicrotime(&ifp->if_lastchange);
1212 u_long oldmtu = ifp->if_mtu;
1217 if (ifp->if_ioctl == NULL)
1218 return (EOPNOTSUPP);
1219 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1221 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
1223 getmicrotime(&ifp->if_lastchange);
1227 * If the link MTU changed, do network layer specific procedure.
1229 if (ifp->if_mtu != oldmtu) {
1243 /* Don't allow group membership on non-multicast interfaces. */
1244 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1247 /* Don't let users screw up protocols' entries. */
1248 if (ifr->ifr_addr.sa_family != AF_LINK)
1251 if (cmd == SIOCADDMULTI) {
1252 struct ifmultiaddr *ifma;
1253 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1255 error = if_delmulti(ifp, &ifr->ifr_addr);
1258 getmicrotime(&ifp->if_lastchange);
1261 case SIOCSIFPHYADDR:
1262 case SIOCDIFPHYADDR:
1264 case SIOCSIFPHYADDR_IN6:
1266 case SIOCSLIFPHYADDR:
1268 case SIOCSIFGENERIC:
1272 if (ifp->if_ioctl == 0)
1273 return (EOPNOTSUPP);
1274 error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred);
1276 getmicrotime(&ifp->if_lastchange);
1280 ifs = (struct ifstat *)data;
1281 ifs->ascii[0] = '\0';
1283 case SIOCGIFPSRCADDR:
1284 case SIOCGIFPDSTADDR:
1285 case SIOCGLIFPHYADDR:
1287 case SIOCGIFGENERIC:
1288 if (ifp->if_ioctl == 0)
1289 return (EOPNOTSUPP);
1290 return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred));
1296 return if_setlladdr(ifp,
1297 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1300 oif_flags = ifp->if_flags;
1301 if (so->so_proto == 0)
1302 return (EOPNOTSUPP);
1304 error = so_pru_control(so, cmd, data, ifp, td);
1311 case SIOCSIFDSTADDR:
1313 case SIOCSIFBRDADDR:
1314 case SIOCSIFNETMASK:
1315 #if BYTE_ORDER != BIG_ENDIAN
1316 if (ifr->ifr_addr.sa_family == 0 &&
1317 ifr->ifr_addr.sa_len < 16) {
1318 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1319 ifr->ifr_addr.sa_len = 16;
1322 if (ifr->ifr_addr.sa_len == 0)
1323 ifr->ifr_addr.sa_len = 16;
1331 case OSIOCGIFDSTADDR:
1332 cmd = SIOCGIFDSTADDR;
1335 case OSIOCGIFBRDADDR:
1336 cmd = SIOCGIFBRDADDR;
1339 case OSIOCGIFNETMASK:
1340 cmd = SIOCGIFNETMASK;
1342 error = so_pru_control(so, cmd, data, ifp, td);
1346 case OSIOCGIFDSTADDR:
1347 case OSIOCGIFBRDADDR:
1348 case OSIOCGIFNETMASK:
1349 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1353 #endif /* COMPAT_43 */
1355 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1357 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1358 if (ifp->if_flags & IFF_UP) {
1372 * Set/clear promiscuous mode on interface ifp based on the truth value
1373 * of pswitch. The calls are reference counted so that only the first
1374 * "on" request actually has an effect, as does the final "off" request.
1375 * Results are undefined if the "off" and "on" requests are not matched.
1378 ifpromisc(struct ifnet *ifp, int pswitch)
1384 oldflags = ifp->if_flags;
1385 if (ifp->if_flags & IFF_PPROMISC) {
1386 /* Do nothing if device is in permanently promiscuous mode */
1387 ifp->if_pcount += pswitch ? 1 : -1;
1392 * If the device is not configured up, we cannot put it in
1395 if ((ifp->if_flags & IFF_UP) == 0)
1397 if (ifp->if_pcount++ != 0)
1399 ifp->if_flags |= IFF_PROMISC;
1400 log(LOG_INFO, "%s: promiscuous mode enabled\n",
1403 if (--ifp->if_pcount > 0)
1405 ifp->if_flags &= ~IFF_PROMISC;
1406 log(LOG_INFO, "%s: promiscuous mode disabled\n",
1409 ifr.ifr_flags = ifp->if_flags;
1410 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1411 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1412 (struct ucred *)NULL);
1416 ifp->if_flags = oldflags;
1421 * Return interface configuration
1422 * of system. List may be used
1423 * in later ioctl's (above) to get
1424 * other information.
1427 ifconf(u_long cmd, caddr_t data, struct thread *td)
1429 struct ifconf *ifc = (struct ifconf *)data;
1432 struct sockaddr *sa;
1433 struct ifreq ifr, *ifrp;
1434 int space = ifc->ifc_len, error = 0;
1436 ifrp = ifc->ifc_req;
1437 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1440 if (space <= sizeof ifr)
1444 * Zero the stack declared structure first to prevent
1445 * memory disclosure.
1447 bzero(&ifr, sizeof(ifr));
1448 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1449 >= sizeof(ifr.ifr_name)) {
1450 error = ENAMETOOLONG;
1455 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1456 if (space <= sizeof ifr)
1459 if (td->td_proc->p_ucred->cr_prison &&
1464 if (cmd == OSIOCGIFCONF) {
1465 struct osockaddr *osa =
1466 (struct osockaddr *)&ifr.ifr_addr;
1468 osa->sa_family = sa->sa_family;
1469 error = copyout(&ifr, ifrp, sizeof ifr);
1473 if (sa->sa_len <= sizeof(*sa)) {
1475 error = copyout(&ifr, ifrp, sizeof ifr);
1478 if (space < (sizeof ifr) + sa->sa_len -
1481 space -= sa->sa_len - sizeof(*sa);
1482 error = copyout(&ifr, ifrp,
1483 sizeof ifr.ifr_name);
1485 error = copyout(sa, &ifrp->ifr_addr,
1487 ifrp = (struct ifreq *)
1488 (sa->sa_len + (caddr_t)&ifrp->ifr_addr);
1492 space -= sizeof ifr;
1497 bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr);
1498 error = copyout(&ifr, ifrp, sizeof ifr);
1501 space -= sizeof ifr;
1505 ifc->ifc_len -= space;
1510 * Just like if_promisc(), but for all-multicast-reception mode.
1513 if_allmulti(struct ifnet *ifp, int onswitch)
1520 if (ifp->if_amcount++ == 0) {
1521 ifp->if_flags |= IFF_ALLMULTI;
1522 ifr.ifr_flags = ifp->if_flags;
1523 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1524 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1525 (struct ucred *)NULL);
1528 if (ifp->if_amcount > 1) {
1531 ifp->if_amcount = 0;
1532 ifp->if_flags &= ~IFF_ALLMULTI;
1533 ifr.ifr_flags = ifp->if_flags;
1534 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1535 error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1536 (struct ucred *)NULL);
1547 * Add a multicast listenership to the interface in question.
1548 * The link layer provides a routine which converts
1552 struct ifnet *ifp, /* interface to manipulate */
1553 struct sockaddr *sa, /* address to add */
1554 struct ifmultiaddr **retifma)
1556 struct sockaddr *llsa, *dupsa;
1558 struct ifmultiaddr *ifma;
1561 * If the matching multicast address already exists
1562 * then don't add a new one, just add a reference
1564 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1565 if (sa_equal(sa, ifma->ifma_addr)) {
1566 ifma->ifma_refcount++;
1574 * Give the link layer a chance to accept/reject it, and also
1575 * find out which AF_LINK address this maps to, if it isn't one
1578 if (ifp->if_resolvemulti) {
1579 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1580 if (error) return error;
1585 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1586 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1587 bcopy(sa, dupsa, sa->sa_len);
1589 ifma->ifma_addr = dupsa;
1590 ifma->ifma_lladdr = llsa;
1591 ifma->ifma_ifp = ifp;
1592 ifma->ifma_refcount = 1;
1593 ifma->ifma_protospec = 0;
1594 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1597 * Some network interfaces can scan the address list at
1598 * interrupt time; lock them out.
1601 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1606 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1607 if (sa_equal(ifma->ifma_addr, llsa))
1611 ifma->ifma_refcount++;
1613 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1614 M_IFMADDR, M_WAITOK);
1615 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1616 M_IFMADDR, M_WAITOK);
1617 bcopy(llsa, dupsa, llsa->sa_len);
1618 ifma->ifma_addr = dupsa;
1619 ifma->ifma_ifp = ifp;
1620 ifma->ifma_refcount = 1;
1622 LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1627 * We are certain we have added something, so call down to the
1628 * interface to let them know about it.
1631 ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL);
1638 * Remove a reference to a multicast address on this interface. Yell
1639 * if the request does not match an existing membership.
1642 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
1644 struct ifmultiaddr *ifma;
1647 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1648 if (sa_equal(sa, ifma->ifma_addr))
1653 if (ifma->ifma_refcount > 1) {
1654 ifma->ifma_refcount--;
1658 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1659 sa = ifma->ifma_lladdr;
1661 LIST_REMOVE(ifma, ifma_link);
1663 * Make sure the interface driver is notified
1664 * in the case of a link layer mcast group being left.
1666 if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0)
1667 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
1669 free(ifma->ifma_addr, M_IFMADDR);
1670 free(ifma, M_IFMADDR);
1675 * Now look for the link-layer address which corresponds to
1676 * this network address. It had been squirreled away in
1677 * ifma->ifma_lladdr for this purpose (so we don't have
1678 * to call ifp->if_resolvemulti() again), and we saved that
1679 * value in sa above. If some nasty deleted the
1680 * link-layer address out from underneath us, we can deal because
1681 * the address we stored was is not the same as the one which was
1682 * in the record for the link-layer address. (So we don't complain
1685 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1686 if (sa_equal(sa, ifma->ifma_addr))
1691 if (ifma->ifma_refcount > 1) {
1692 ifma->ifma_refcount--;
1697 LIST_REMOVE(ifma, ifma_link);
1698 ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL);
1700 free(ifma->ifma_addr, M_IFMADDR);
1701 free(sa, M_IFMADDR);
1702 free(ifma, M_IFMADDR);
1708 * Set the link layer address on an interface.
1710 * At this time we only support certain types of interfaces,
1711 * and we don't allow the length of the address to change.
1714 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
1716 struct sockaddr_dl *sdl;
1720 ifa = ifnet_addrs[ifp->if_index - 1];
1723 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1726 if (len != sdl->sdl_alen) /* don't allow length to change */
1728 switch (ifp->if_type) {
1729 case IFT_ETHER: /* these types use struct arpcom */
1734 bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len);
1737 bcopy(lladdr, LLADDR(sdl), len);
1743 * If the interface is already up, we need
1744 * to re-init it in order to reprogram its
1747 if ((ifp->if_flags & IFF_UP) != 0) {
1748 ifp->if_flags &= ~IFF_UP;
1749 ifr.ifr_flags = ifp->if_flags;
1750 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1751 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1752 (struct ucred *)NULL);
1753 ifp->if_flags |= IFF_UP;
1754 ifr.ifr_flags = ifp->if_flags;
1755 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1756 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr,
1757 (struct ucred *)NULL);
1760 * Also send gratuitous ARPs to notify other nodes about
1761 * the address change.
1763 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1764 if (ifa->ifa_addr != NULL &&
1765 ifa->ifa_addr->sa_family == AF_INET)
1766 arp_ifinit(ifp, ifa);
1773 struct ifmultiaddr *
1774 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
1776 struct ifmultiaddr *ifma;
1778 LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1779 if (sa_equal(ifma->ifma_addr, sa))
1786 * The name argument must be a pointer to storage which will last as
1787 * long as the interface does. For physical devices, the result of
1788 * device_get_name(dev) is a good choice and for pseudo-devices a
1789 * static string works well.
1792 if_initname(struct ifnet *ifp, const char *name, int unit)
1794 ifp->if_dname = name;
1795 ifp->if_dunit = unit;
1796 if (unit != IF_DUNIT_NONE)
1797 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
1799 strlcpy(ifp->if_xname, name, IFNAMSIZ);
1803 if_printf(struct ifnet *ifp, const char *fmt, ...)
1808 retval = printf("%s: ", ifp->if_xname);
1809 __va_start(ap, fmt);
1810 retval += vprintf(fmt, ap);
1815 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
1816 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
1819 ifq_set_classic(struct ifaltq *ifq)
1821 ifq->altq_enqueue = ifq_classic_enqueue;
1822 ifq->altq_dequeue = ifq_classic_dequeue;
1823 ifq->altq_request = ifq_classic_request;
1827 ifq_classic_enqueue(struct ifaltq *ifq, struct mbuf *m,
1828 struct altq_pktattr *pa __unused)
1831 if (IF_QFULL(ifq)) {
1842 static struct mbuf *
1843 ifq_classic_dequeue(struct ifaltq *ifq, int op)
1856 panic("unsupported ALTQ dequeue op: %d", op);
1863 ifq_classic_request(struct ifaltq *ifq, int req, void *arg)
1871 panic("unspported ALTQ request: %d", req);