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 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#)if.c 8.5 (Berkeley) 1/9/95
33 #include "opt_compat.h"
34 #include "opt_inet6.h"
39 #include <sys/param.h>
40 #include <sys/types.h>
43 #include <sys/malloc.h>
47 #include <sys/systm.h>
49 #include <sys/socket.h>
50 #include <sys/socketvar.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/taskqueue.h>
57 #include <sys/domain.h>
59 #include <machine/stdarg.h>
62 #include <net/if_arp.h>
63 #include <net/if_clone.h>
64 #include <net/if_dl.h>
65 #include <net/if_types.h>
66 #include <net/if_var.h>
67 #include <net/radix.h>
68 #include <net/route.h>
70 #if defined(INET) || defined(INET6)
72 #include <netinet/in.h>
73 #include <netinet/in_var.h>
75 #include <netinet6/in6_var.h>
76 #include <netinet6/in6_ifattach.h>
80 #include <netinet/if_ether.h>
83 #include <netinet/ip_carp.h>
86 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
87 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
89 /* Log link state change events */
90 static int log_link_state_change = 1;
92 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW,
93 &log_link_state_change, 0,
94 "log interface link state change events");
96 void (*bstp_linkstate_p)(struct ifnet *ifp, int state);
97 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state);
99 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL;
101 static void if_attachdomain(void *);
102 static void if_attachdomain1(struct ifnet *);
103 static int ifconf(u_long, caddr_t);
104 static void if_grow(void);
105 static void if_init(void *);
106 static void if_check(void *);
107 static int if_findindex(struct ifnet *);
108 static void if_qflush(struct ifaltq *);
109 static void if_route(struct ifnet *, int flag, int fam);
110 static int if_setflag(struct ifnet *, int, int, int *, int);
111 static void if_slowtimo(void *);
112 static void if_unroute(struct ifnet *, int flag, int fam);
113 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
114 static int if_rtdel(struct radix_node *, void *);
115 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *);
116 static void if_start_deferred(void *context, int pending);
117 static void do_link_state_change(void *, int);
120 * XXX: declare here to avoid to include many inet6 related files..
121 * should be more generalized?
123 extern void nd6_setmtu(struct ifnet *);
127 struct ifindex_entry *ifindex_table = NULL;
128 int ifqmaxlen = IFQ_MAXLEN;
129 struct ifnethead ifnet; /* depend on static init XXX */
130 struct mtx ifnet_lock;
131 static if_com_alloc_t *if_com_alloc[256];
132 static if_com_free_t *if_com_free[256];
134 static int if_indexlim = 8;
135 static struct knlist ifklist;
137 static void filt_netdetach(struct knote *kn);
138 static int filt_netdev(struct knote *kn, long hint);
140 static struct filterops netdev_filtops =
141 { 1, NULL, filt_netdetach, filt_netdev };
144 * System initialization
146 SYSINIT(interfaces, SI_SUB_INIT_IF, SI_ORDER_FIRST, if_init, NULL)
147 SYSINIT(interface_check, SI_SUB_PROTO_IF, SI_ORDER_FIRST, if_check, NULL)
149 MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
150 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
151 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
153 static d_open_t netopen;
154 static d_close_t netclose;
155 static d_ioctl_t netioctl;
156 static d_kqfilter_t netkqfilter;
158 static struct cdevsw net_cdevsw = {
159 .d_version = D_VERSION,
160 .d_flags = D_NEEDGIANT,
165 .d_kqfilter = netkqfilter,
169 netopen(struct cdev *dev, int flag, int mode, struct thread *td)
175 netclose(struct cdev *dev, int flags, int fmt, struct thread *td)
181 netioctl(struct cdev *dev, u_long cmd, caddr_t data, int flag, struct thread *td)
186 /* only support interface specific ioctls */
187 if (IOCGROUP(cmd) != 'i')
192 * special network device, not interface.
194 if (cmd == SIOCGIFCONF)
195 return (ifconf(cmd, data)); /* XXX remove cmd */
199 ifp = ifnet_byindex(idx);
203 error = ifhwioctl(cmd, ifp, data, td);
204 if (error == ENOIOCTL)
210 netkqfilter(struct cdev *dev, struct knote *kn)
212 struct knlist *klist;
216 switch (kn->kn_filter) {
218 kn->kn_fop = &netdev_filtops;
228 ifp = ifnet_byindex(idx);
231 klist = &ifp->if_klist;
234 kn->kn_hook = (caddr_t)klist;
236 knlist_add(klist, kn, 0);
242 filt_netdetach(struct knote *kn)
244 struct knlist *klist = (struct knlist *)kn->kn_hook;
246 knlist_remove(klist, kn, 0);
250 filt_netdev(struct knote *kn, long hint)
252 struct knlist *klist = (struct knlist *)kn->kn_hook;
255 * Currently NOTE_EXIT is abused to indicate device detach.
257 if (hint == NOTE_EXIT) {
258 kn->kn_data = NOTE_LINKINV;
259 kn->kn_flags |= (EV_EOF | EV_ONESHOT);
260 knlist_remove_inevent(klist, kn);
264 kn->kn_data = hint; /* current status */
265 if (kn->kn_sfflags & hint)
266 kn->kn_fflags |= hint;
267 return (kn->kn_fflags != 0);
271 * Network interface utility routines.
273 * Routines with ifa_ifwith* names take sockaddr *'s as
278 if_init(void *dummy __unused)
283 knlist_init(&ifklist, NULL, NULL, NULL, NULL);
284 if_grow(); /* create initial table */
285 ifdev_byindex(0) = make_dev(&net_cdevsw, 0,
286 UID_ROOT, GID_WHEEL, 0600, "network");
294 struct ifindex_entry *e;
297 n = if_indexlim * sizeof(*e);
298 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO);
299 if (ifindex_table != NULL) {
300 memcpy((caddr_t)e, (caddr_t)ifindex_table, n/2);
301 free((caddr_t)ifindex_table, M_IFNET);
308 if_check(void *dummy __unused)
314 IFNET_RLOCK(); /* could sleep on rare error; mostly okay XXX */
315 TAILQ_FOREACH(ifp, &ifnet, if_link) {
316 if (ifp->if_snd.ifq_maxlen == 0) {
317 if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n");
318 ifp->if_snd.ifq_maxlen = ifqmaxlen;
320 if (!mtx_initialized(&ifp->if_snd.ifq_mtx)) {
322 "XXX: driver didn't initialize queue mtx\n");
323 mtx_init(&ifp->if_snd.ifq_mtx, "unknown",
324 MTX_NETWORK_LOCK, MTX_DEF);
332 /* XXX: should be locked. */
334 if_findindex(struct ifnet *ifp)
337 char eaddr[18], devname[32];
338 const char *name, *p;
340 switch (ifp->if_type) {
341 case IFT_ETHER: /* these types use struct arpcom */
347 snprintf(eaddr, 18, "%6D", IFP2ENADDR(ifp), ":");
353 strlcpy(devname, ifp->if_xname, sizeof(devname));
354 name = net_cdevsw.d_name;
356 while ((resource_find_dev(&i, name, &unit, NULL, NULL)) == 0) {
357 if (resource_string_value(name, unit, "ether", &p) == 0)
358 if (strcmp(p, eaddr) == 0)
360 if (resource_string_value(name, unit, "dev", &p) == 0)
361 if (strcmp(p, devname) == 0)
367 if (ifaddr_byindex(unit) == NULL)
369 printf("%s%d in use, cannot hardwire it to %s.\n",
370 name, unit, devname);
372 for (unit = 1; ; unit++) {
373 if (unit <= if_index && ifaddr_byindex(unit) != NULL)
375 if (resource_string_value(name, unit, "ether", &p) == 0 ||
376 resource_string_value(name, unit, "dev", &p) == 0)
384 * Allocate a struct ifnet and in index for an interface.
387 if_alloc(u_char type)
391 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO);
393 /* XXX: This should fail if if_index is too big */
394 ifp->if_index = if_findindex(ifp);
395 if (ifp->if_index > if_index)
396 if_index = ifp->if_index;
397 if (if_index >= if_indexlim)
400 ifnet_byindex(ifp->if_index) = ifp;
404 if (if_com_alloc[type] != NULL) {
405 ifp->if_l2com = if_com_alloc[type](type, ifp);
406 if (ifp->if_l2com == NULL) {
416 if_free(struct ifnet *ifp)
419 if_free_type(ifp, ifp->if_type);
423 if_free_type(struct ifnet *ifp, u_char type)
426 if (ifp != ifnet_byindex(ifp->if_index)) {
427 if_printf(ifp, "%s: value was not if_alloced, skipping\n",
432 ifnet_byindex(ifp->if_index) = NULL;
434 /* XXX: should be locked with if_findindex() */
435 while (if_index > 0 && ifaddr_byindex(if_index) == NULL)
438 if (if_com_free[type] != NULL)
439 if_com_free[type](ifp->if_l2com, type);
445 * Attach an interface to the
446 * list of "active" interfaces.
449 if_attach(struct ifnet *ifp)
451 unsigned socksize, ifasize;
452 int namelen, masklen;
453 struct sockaddr_dl *sdl;
456 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index))
457 panic ("%s: BUG: if_attach called without if_alloc'd input()\n",
460 TASK_INIT(&ifp->if_starttask, 0, if_start_deferred, ifp);
461 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp);
462 IF_AFDATA_LOCK_INIT(ifp);
463 ifp->if_afdata_initialized = 0;
465 TAILQ_INSERT_TAIL(&ifnet, ifp, if_link);
469 * The old code would work if the interface passed a pre-existing
470 * chain of ifaddrs to this code. We don't trust our callers to
471 * properly initialize the tailq, however, so we no longer allow
472 * this unlikely case.
474 TAILQ_INIT(&ifp->if_addrhead);
475 TAILQ_INIT(&ifp->if_prefixhead);
476 TAILQ_INIT(&ifp->if_multiaddrs);
477 knlist_init(&ifp->if_klist, NULL, NULL, NULL, NULL);
478 getmicrotime(&ifp->if_lastchange);
479 ifp->if_data.ifi_epoch = time_uptime;
480 ifp->if_data.ifi_datalen = sizeof(struct if_data);
484 mac_create_ifnet(ifp);
487 ifdev_byindex(ifp->if_index) = make_dev(&net_cdevsw,
488 unit2minor(ifp->if_index),
489 UID_ROOT, GID_WHEEL, 0600, "%s/%s",
490 net_cdevsw.d_name, ifp->if_xname);
491 make_dev_alias(ifdev_byindex(ifp->if_index), "%s%d",
492 net_cdevsw.d_name, ifp->if_index);
494 mtx_init(&ifp->if_snd.ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF);
497 * create a Link Level name for this device
499 namelen = strlen(ifp->if_xname);
501 * Always save enough space for any possiable name so we can do
502 * a rename in place later.
504 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ;
505 socksize = masklen + ifp->if_addrlen;
506 if (socksize < sizeof(*sdl))
507 socksize = sizeof(*sdl);
508 socksize = roundup2(socksize, sizeof(long));
509 ifasize = sizeof(*ifa) + 2 * socksize;
510 ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO);
512 sdl = (struct sockaddr_dl *)(ifa + 1);
513 sdl->sdl_len = socksize;
514 sdl->sdl_family = AF_LINK;
515 bcopy(ifp->if_xname, sdl->sdl_data, namelen);
516 sdl->sdl_nlen = namelen;
517 sdl->sdl_index = ifp->if_index;
518 sdl->sdl_type = ifp->if_type;
519 ifaddr_byindex(ifp->if_index) = ifa;
521 ifa->ifa_rtrequest = link_rtrequest;
522 ifa->ifa_addr = (struct sockaddr *)sdl;
523 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl);
524 ifa->ifa_netmask = (struct sockaddr *)sdl;
525 sdl->sdl_len = masklen;
527 sdl->sdl_data[--namelen] = 0xff;
529 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link);
530 ifp->if_broadcastaddr = NULL; /* reliably crash if used uninitialized */
531 ifp->if_snd.altq_type = 0;
532 ifp->if_snd.altq_disc = NULL;
533 ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE;
534 ifp->if_snd.altq_tbr = NULL;
535 ifp->if_snd.altq_ifp = ifp;
537 if (domain_init_status >= 2)
538 if_attachdomain1(ifp);
540 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
542 /* Announce the interface. */
543 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
547 if_attachdomain(void *dummy)
553 TAILQ_FOREACH(ifp, &ifnet, if_link)
554 if_attachdomain1(ifp);
557 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND,
558 if_attachdomain, NULL);
561 if_attachdomain1(struct ifnet *ifp)
569 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we
570 * cannot lock ifp->if_afdata initialization, entirely.
572 if (IF_AFDATA_TRYLOCK(ifp) == 0) {
576 if (ifp->if_afdata_initialized >= domain_init_status) {
577 IF_AFDATA_UNLOCK(ifp);
579 printf("if_attachdomain called more than once on %s\n",
583 ifp->if_afdata_initialized = domain_init_status;
584 IF_AFDATA_UNLOCK(ifp);
586 /* address family dependent data region */
587 bzero(ifp->if_afdata, sizeof(ifp->if_afdata));
588 for (dp = domains; dp; dp = dp->dom_next) {
589 if (dp->dom_ifattach)
590 ifp->if_afdata[dp->dom_family] =
591 (*dp->dom_ifattach)(ifp);
598 * Remove any network addresses from an interface.
602 if_purgeaddrs(struct ifnet *ifp)
604 struct ifaddr *ifa, *next;
606 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) {
608 if (ifa->ifa_addr->sa_family == AF_LINK)
611 /* XXX: Ugly!! ad hoc just for INET */
612 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) {
613 struct ifaliasreq ifr;
615 bzero(&ifr, sizeof(ifr));
616 ifr.ifra_addr = *ifa->ifa_addr;
617 if (ifa->ifa_dstaddr)
618 ifr.ifra_broadaddr = *ifa->ifa_dstaddr;
619 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp,
625 if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) {
627 /* ifp_addrhead is already updated */
631 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
637 * Detach an interface, removing it from the
638 * list of "active" interfaces and freeing the struct ifnet.
641 if_detach(struct ifnet *ifp)
644 struct radix_node_head *rnh;
652 * Remove/wait for pending events.
654 taskqueue_drain(taskqueue_swi, &ifp->if_linktask);
657 /* Maybe hook to the generalized departure handler above?!? */
663 * Remove routes and flush queues.
668 if (ALTQ_IS_ENABLED(&ifp->if_snd))
669 altq_disable(&ifp->if_snd);
670 if (ALTQ_IS_ATTACHED(&ifp->if_snd))
671 altq_detach(&ifp->if_snd);
678 * Remove all IPv6 kernel structs related to ifp. This should be done
679 * before removing routing entries below, since IPv6 interface direct
680 * routes are expected to be removed by the IPv6-specific kernel API.
681 * Otherwise, the kernel will detect some inconsistency and bark it.
686 * Remove address from ifindex_table[] and maybe decrement if_index.
687 * Clean up all addresses.
689 ifaddr_byindex(ifp->if_index) = NULL;
690 destroy_dev(ifdev_byindex(ifp->if_index));
691 ifdev_byindex(ifp->if_index) = NULL;
693 /* We can now free link ifaddr. */
694 if (!TAILQ_EMPTY(&ifp->if_addrhead)) {
695 ifa = TAILQ_FIRST(&ifp->if_addrhead);
696 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link);
701 * Delete all remaining routes using this interface
702 * Unfortuneatly the only way to do this is to slog through
703 * the entire routing table looking for routes which point
704 * to this interface...oh well...
706 for (i = 1; i <= AF_MAX; i++) {
707 if ((rnh = rt_tables[i]) == NULL)
709 RADIX_NODE_HEAD_LOCK(rnh);
710 (void) rnh->rnh_walktree(rnh, if_rtdel, ifp);
711 RADIX_NODE_HEAD_UNLOCK(rnh);
714 /* Announce that the interface is gone. */
715 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
716 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
719 for (dp = domains; dp; dp = dp->dom_next) {
720 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family])
721 (*dp->dom_ifdetach)(ifp,
722 ifp->if_afdata[dp->dom_family]);
724 IF_AFDATA_UNLOCK(ifp);
727 mac_destroy_ifnet(ifp);
729 KNOTE_UNLOCKED(&ifp->if_klist, NOTE_EXIT);
730 knlist_clear(&ifp->if_klist, 0);
731 knlist_destroy(&ifp->if_klist);
734 TAILQ_FOREACH(iter, &ifnet, if_link)
740 TAILQ_REMOVE(&ifnet, ifp, if_link);
742 mtx_destroy(&ifp->if_snd.ifq_mtx);
743 IF_AFDATA_DESTROY(ifp);
748 * Delete Routes for a Network Interface
750 * Called for each routing entry via the rnh->rnh_walktree() call above
751 * to delete all route entries referencing a detaching network interface.
754 * rn pointer to node in the routing table
755 * arg argument passed to rnh->rnh_walktree() - detaching interface
759 * errno failed - reason indicated
763 if_rtdel(struct radix_node *rn, void *arg)
765 struct rtentry *rt = (struct rtentry *)rn;
766 struct ifnet *ifp = arg;
769 if (rt->rt_ifp == ifp) {
772 * Protect (sorta) against walktree recursion problems
775 if ((rt->rt_flags & RTF_UP) == 0)
778 err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway,
779 rt_mask(rt), rt->rt_flags,
780 (struct rtentry **) NULL);
782 log(LOG_WARNING, "if_rtdel: error %d\n", err);
789 #define sa_equal(a1, a2) (bcmp((a1), (a2), ((a1))->sa_len) == 0)
792 * Locate an interface based on a complete address.
796 ifa_ifwithaddr(struct sockaddr *addr)
802 TAILQ_FOREACH(ifp, &ifnet, if_link)
803 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
804 if (ifa->ifa_addr->sa_family != addr->sa_family)
806 if (sa_equal(addr, ifa->ifa_addr))
808 /* IP6 doesn't have broadcast */
809 if ((ifp->if_flags & IFF_BROADCAST) &&
810 ifa->ifa_broadaddr &&
811 ifa->ifa_broadaddr->sa_len != 0 &&
812 sa_equal(ifa->ifa_broadaddr, addr))
822 * Locate the point to point interface with a given destination address.
826 ifa_ifwithdstaddr(struct sockaddr *addr)
832 TAILQ_FOREACH(ifp, &ifnet, if_link) {
833 if ((ifp->if_flags & IFF_POINTOPOINT) == 0)
835 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
836 if (ifa->ifa_addr->sa_family != addr->sa_family)
838 if (ifa->ifa_dstaddr &&
839 sa_equal(addr, ifa->ifa_dstaddr))
850 * Find an interface on a specific network. If many, choice
851 * is most specific found.
854 ifa_ifwithnet(struct sockaddr *addr)
858 struct ifaddr *ifa_maybe = (struct ifaddr *) 0;
859 u_int af = addr->sa_family;
860 char *addr_data = addr->sa_data, *cplim;
863 * AF_LINK addresses can be looked up directly by their index number,
864 * so do that if we can.
867 struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr;
868 if (sdl->sdl_index && sdl->sdl_index <= if_index)
869 return (ifaddr_byindex(sdl->sdl_index));
873 * Scan though each interface, looking for ones that have
874 * addresses in this address family.
877 TAILQ_FOREACH(ifp, &ifnet, if_link) {
878 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
879 char *cp, *cp2, *cp3;
881 if (ifa->ifa_addr->sa_family != af)
883 if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) {
885 * This is a bit broken as it doesn't
886 * take into account that the remote end may
887 * be a single node in the network we are
889 * The trouble is that we don't know the
890 * netmask for the remote end.
892 if (ifa->ifa_dstaddr != 0 &&
893 sa_equal(addr, ifa->ifa_dstaddr))
897 * if we have a special address handler,
898 * then use it instead of the generic one.
900 if (ifa->ifa_claim_addr) {
901 if ((*ifa->ifa_claim_addr)(ifa, addr))
907 * Scan all the bits in the ifa's address.
908 * If a bit dissagrees with what we are
909 * looking for, mask it with the netmask
910 * to see if it really matters.
913 if (ifa->ifa_netmask == 0)
916 cp2 = ifa->ifa_addr->sa_data;
917 cp3 = ifa->ifa_netmask->sa_data;
918 cplim = ifa->ifa_netmask->sa_len
919 + (char *)ifa->ifa_netmask;
921 if ((*cp++ ^ *cp2++) & *cp3++)
922 goto next; /* next address! */
924 * If the netmask of what we just found
925 * is more specific than what we had before
926 * (if we had one) then remember the new one
927 * before continuing to search
928 * for an even better one.
930 if (ifa_maybe == 0 ||
931 rn_refines((caddr_t)ifa->ifa_netmask,
932 (caddr_t)ifa_maybe->ifa_netmask))
944 * Find an interface address specific to an interface best matching
948 ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp)
951 char *cp, *cp2, *cp3;
953 struct ifaddr *ifa_maybe = 0;
954 u_int af = addr->sa_family;
958 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
959 if (ifa->ifa_addr->sa_family != af)
963 if (ifa->ifa_netmask == 0) {
964 if (sa_equal(addr, ifa->ifa_addr) ||
966 sa_equal(addr, ifa->ifa_dstaddr)))
970 if (ifp->if_flags & IFF_POINTOPOINT) {
971 if (sa_equal(addr, ifa->ifa_dstaddr))
975 cp2 = ifa->ifa_addr->sa_data;
976 cp3 = ifa->ifa_netmask->sa_data;
977 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask;
978 for (; cp3 < cplim; cp3++)
979 if ((*cp++ ^ *cp2++) & *cp3)
990 #include <net/route.h>
993 * Default action when installing a route with a Link Level gateway.
994 * Lookup an appropriate real ifa to point to.
995 * This should be moved to /sys/net/link.c eventually.
998 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info)
1000 struct ifaddr *ifa, *oifa;
1001 struct sockaddr *dst;
1006 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == 0) ||
1007 ((ifp = ifa->ifa_ifp) == 0) || ((dst = rt_key(rt)) == 0))
1009 ifa = ifaof_ifpforaddr(dst, ifp);
1011 IFAREF(ifa); /* XXX */
1015 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest)
1016 ifa->ifa_rtrequest(cmd, rt, info);
1021 * Mark an interface down and notify protocols of
1023 * NOTE: must be called at splnet or eqivalent.
1026 if_unroute(struct ifnet *ifp, int flag, int fam)
1030 ifp->if_flags &= ~flag;
1031 getmicrotime(&ifp->if_lastchange);
1032 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1033 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1034 pfctlinput(PRC_IFDOWN, ifa->ifa_addr);
1035 if_qflush(&ifp->if_snd);
1038 carp_carpdev_state(ifp->if_carp);
1044 * Mark an interface up and notify protocols of
1046 * NOTE: must be called at splnet or eqivalent.
1049 if_route(struct ifnet *ifp, int flag, int fam)
1053 ifp->if_flags |= flag;
1054 getmicrotime(&ifp->if_lastchange);
1055 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link)
1056 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family))
1057 pfctlinput(PRC_IFUP, ifa->ifa_addr);
1060 carp_carpdev_state(ifp->if_carp);
1068 void (*vlan_link_state_p)(struct ifnet *, int); /* XXX: private from if_vlan */
1071 * Handle a change in the interface link state. To avoid LORs
1072 * between driver lock and upper layer locks, as well as possible
1073 * recursions, we post event to taskqueue, and all job
1074 * is done in static do_link_state_change().
1077 if_link_state_change(struct ifnet *ifp, int link_state)
1079 /* Return if state hasn't changed. */
1080 if (ifp->if_link_state == link_state)
1083 ifp->if_link_state = link_state;
1085 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask);
1089 do_link_state_change(void *arg, int pending)
1091 struct ifnet *ifp = (struct ifnet *)arg;
1092 int link_state = ifp->if_link_state;
1095 /* Notify that the link state has changed. */
1097 if (link_state == LINK_STATE_UP)
1099 else if (link_state == LINK_STATE_DOWN)
1100 link = NOTE_LINKDOWN;
1102 link = NOTE_LINKINV;
1103 KNOTE_UNLOCKED(&ifp->if_klist, link);
1104 if (ifp->if_nvlans != 0)
1105 (*vlan_link_state_p)(ifp, link);
1107 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) &&
1108 IFP2AC(ifp)->ac_netgraph != NULL)
1109 (*ng_ether_link_state_p)(ifp, link_state);
1112 carp_carpdev_state(ifp->if_carp);
1114 if (ifp->if_bridge) {
1115 KASSERT(bstp_linkstate_p != NULL,("if_bridge bstp not loaded!"));
1116 (*bstp_linkstate_p)(ifp, link_state);
1119 devctl_notify("IFNET", ifp->if_xname,
1120 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", NULL);
1122 if_printf(ifp, "%d link states coalesced\n", pending);
1123 if (log_link_state_change)
1124 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname,
1125 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" );
1129 * Mark an interface down and notify protocols of
1131 * NOTE: must be called at splnet or eqivalent.
1134 if_down(struct ifnet *ifp)
1137 if_unroute(ifp, IFF_UP, AF_UNSPEC);
1141 * Mark an interface up and notify protocols of
1143 * NOTE: must be called at splnet or eqivalent.
1146 if_up(struct ifnet *ifp)
1149 if_route(ifp, IFF_UP, AF_UNSPEC);
1153 * Flush an interface queue.
1156 if_qflush(struct ifaltq *ifq)
1162 if (ALTQ_IS_ENABLED(ifq))
1166 while ((m = n) != 0) {
1177 * Handle interface watchdog timer routines. Called
1178 * from softclock, we decrement timers (if set) and
1179 * call the appropriate interface routine on expiration.
1181 * XXXRW: Note that because timeouts run with Giant, if_watchdog() is called
1182 * holding Giant. If we switch to an MPSAFE callout, we likely need to grab
1183 * Giant before entering if_watchdog() on an IFF_NEEDSGIANT interface.
1186 if_slowtimo(void *arg)
1192 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1193 if (ifp->if_timer == 0 || --ifp->if_timer)
1195 if (ifp->if_watchdog)
1196 (*ifp->if_watchdog)(ifp);
1200 timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
1204 * Map interface name to
1205 * interface structure pointer.
1208 ifunit(const char *name)
1213 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1214 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0)
1222 * Hardware specific interface ioctls.
1225 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td)
1231 size_t namelen, onamelen;
1232 char new_name[IFNAMSIZ];
1234 struct sockaddr_dl *sdl;
1236 ifr = (struct ifreq *)data;
1239 ifr->ifr_index = ifp->if_index;
1243 ifr->ifr_flags = ifp->if_flags & 0xffff;
1244 ifr->ifr_flagshigh = ifp->if_flags >> 16;
1248 ifr->ifr_reqcap = ifp->if_capabilities;
1249 ifr->ifr_curcap = ifp->if_capenable;
1254 error = mac_ioctl_ifnet_get(td->td_ucred, ifr, ifp);
1259 ifr->ifr_metric = ifp->if_metric;
1263 ifr->ifr_mtu = ifp->if_mtu;
1267 ifr->ifr_phys = ifp->if_physical;
1274 new_flags = (ifr->ifr_flags & 0xffff) |
1275 (ifr->ifr_flagshigh << 16);
1276 if (ifp->if_flags & IFF_SMART) {
1277 /* Smart drivers twiddle their own routes */
1278 } else if (ifp->if_flags & IFF_UP &&
1279 (new_flags & IFF_UP) == 0) {
1283 } else if (new_flags & IFF_UP &&
1284 (ifp->if_flags & IFF_UP) == 0) {
1289 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) |
1290 (new_flags &~ IFF_CANTCHANGE);
1291 if (new_flags & IFF_PPROMISC) {
1292 /* Permanently promiscuous mode requested */
1293 ifp->if_flags |= IFF_PROMISC;
1294 } else if (ifp->if_pcount == 0) {
1295 ifp->if_flags &= ~IFF_PROMISC;
1297 if (ifp->if_ioctl) {
1299 (void) (*ifp->if_ioctl)(ifp, cmd, data);
1300 IFF_UNLOCKGIANT(ifp);
1302 getmicrotime(&ifp->if_lastchange);
1309 if (ifp->if_ioctl == NULL)
1310 return (EOPNOTSUPP);
1311 if (ifr->ifr_reqcap & ~ifp->if_capabilities)
1314 error = (*ifp->if_ioctl)(ifp, cmd, data);
1315 IFF_UNLOCKGIANT(ifp);
1317 getmicrotime(&ifp->if_lastchange);
1322 error = mac_ioctl_ifnet_set(td->td_ucred, ifr, ifp);
1330 error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL);
1333 if (new_name[0] == '\0')
1335 if (ifunit(new_name) != NULL)
1338 /* Announce the departure of the interface. */
1339 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
1340 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp);
1342 log(LOG_INFO, "%s: changing name to '%s'\n",
1343 ifp->if_xname, new_name);
1345 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname));
1346 ifa = ifaddr_byindex(ifp->if_index);
1348 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
1349 namelen = strlen(new_name);
1350 onamelen = sdl->sdl_nlen;
1352 * Move the address if needed. This is safe because we
1353 * allocate space for a name of length IFNAMSIZ when we
1354 * create this in if_attach().
1356 if (namelen != onamelen) {
1357 bcopy(sdl->sdl_data + onamelen,
1358 sdl->sdl_data + namelen, sdl->sdl_alen);
1360 bcopy(new_name, sdl->sdl_data, namelen);
1361 sdl->sdl_nlen = namelen;
1362 sdl = (struct sockaddr_dl *)ifa->ifa_netmask;
1363 bzero(sdl->sdl_data, onamelen);
1364 while (namelen != 0)
1365 sdl->sdl_data[--namelen] = 0xff;
1368 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp);
1369 /* Announce the return of the interface. */
1370 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
1377 ifp->if_metric = ifr->ifr_metric;
1378 getmicrotime(&ifp->if_lastchange);
1385 if (ifp->if_ioctl == NULL)
1386 return (EOPNOTSUPP);
1388 error = (*ifp->if_ioctl)(ifp, cmd, data);
1389 IFF_UNLOCKGIANT(ifp);
1391 getmicrotime(&ifp->if_lastchange);
1396 u_long oldmtu = ifp->if_mtu;
1401 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU)
1403 if (ifp->if_ioctl == NULL)
1404 return (EOPNOTSUPP);
1406 error = (*ifp->if_ioctl)(ifp, cmd, data);
1407 IFF_UNLOCKGIANT(ifp);
1409 getmicrotime(&ifp->if_lastchange);
1413 * If the link MTU changed, do network layer specific procedure.
1415 if (ifp->if_mtu != oldmtu) {
1429 /* Don't allow group membership on non-multicast interfaces. */
1430 if ((ifp->if_flags & IFF_MULTICAST) == 0)
1431 return (EOPNOTSUPP);
1433 /* Don't let users screw up protocols' entries. */
1434 if (ifr->ifr_addr.sa_family != AF_LINK)
1437 if (cmd == SIOCADDMULTI) {
1438 struct ifmultiaddr *ifma;
1439 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma);
1441 error = if_delmulti(ifp, &ifr->ifr_addr);
1444 getmicrotime(&ifp->if_lastchange);
1447 case SIOCSIFPHYADDR:
1448 case SIOCDIFPHYADDR:
1450 case SIOCSIFPHYADDR_IN6:
1452 case SIOCSLIFPHYADDR:
1454 case SIOCSIFGENERIC:
1458 if (ifp->if_ioctl == NULL)
1459 return (EOPNOTSUPP);
1461 error = (*ifp->if_ioctl)(ifp, cmd, data);
1462 IFF_UNLOCKGIANT(ifp);
1464 getmicrotime(&ifp->if_lastchange);
1468 ifs = (struct ifstat *)data;
1469 ifs->ascii[0] = '\0';
1471 case SIOCGIFPSRCADDR:
1472 case SIOCGIFPDSTADDR:
1473 case SIOCGLIFPHYADDR:
1475 case SIOCGIFGENERIC:
1476 if (ifp->if_ioctl == NULL)
1477 return (EOPNOTSUPP);
1479 error = (*ifp->if_ioctl)(ifp, cmd, data);
1480 IFF_UNLOCKGIANT(ifp);
1487 error = if_setlladdr(ifp,
1488 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len);
1502 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td)
1512 return (ifconf(cmd, data));
1514 ifr = (struct ifreq *)data;
1519 if ((error = suser(td)) != 0)
1521 return ((cmd == SIOCIFCREATE) ?
1522 if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) :
1523 if_clone_destroy(ifr->ifr_name));
1525 case SIOCIFGCLONERS:
1526 return (if_clone_list((struct if_clonereq *)data));
1529 ifp = ifunit(ifr->ifr_name);
1533 error = ifhwioctl(cmd, ifp, data, td);
1534 if (error != ENOIOCTL)
1537 oif_flags = ifp->if_flags;
1538 if (so->so_proto == 0)
1539 return (EOPNOTSUPP);
1541 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd,
1550 case SIOCSIFDSTADDR:
1552 case SIOCSIFBRDADDR:
1553 case SIOCSIFNETMASK:
1554 #if BYTE_ORDER != BIG_ENDIAN
1555 if (ifr->ifr_addr.sa_family == 0 &&
1556 ifr->ifr_addr.sa_len < 16) {
1557 ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len;
1558 ifr->ifr_addr.sa_len = 16;
1561 if (ifr->ifr_addr.sa_len == 0)
1562 ifr->ifr_addr.sa_len = 16;
1570 case OSIOCGIFDSTADDR:
1571 cmd = SIOCGIFDSTADDR;
1574 case OSIOCGIFBRDADDR:
1575 cmd = SIOCGIFBRDADDR;
1578 case OSIOCGIFNETMASK:
1579 cmd = SIOCGIFNETMASK;
1581 error = ((*so->so_proto->pr_usrreqs->pru_control)(so,
1588 case OSIOCGIFDSTADDR:
1589 case OSIOCGIFBRDADDR:
1590 case OSIOCGIFNETMASK:
1591 *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family;
1595 #endif /* COMPAT_43 */
1597 if ((oif_flags ^ ifp->if_flags) & IFF_UP) {
1599 DELAY(100);/* XXX: temporary workaround for fxp issue*/
1600 if (ifp->if_flags & IFF_UP) {
1611 * The code common to hadling reference counted flags,
1612 * e.g., in ifpromisc() and if_allmulti().
1613 * The "pflag" argument can specify a permanent mode flag,
1614 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none.
1617 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch)
1621 int oldflags, oldcount;
1623 /* Sanity checks to catch programming errors */
1625 if (*refcount < 0) {
1627 "refusing to increment negative refcount %d "
1628 "for interface flag %d\n", *refcount, flag);
1632 if (*refcount <= 0) {
1634 "refusing to decrement non-positive refcount %d"
1635 "for interface flag %d\n", *refcount, flag);
1640 /* In case this mode is permanent, just touch refcount */
1641 if (ifp->if_flags & pflag) {
1642 *refcount += onswitch ? 1 : -1;
1646 /* Save ifnet parameters for if_ioctl() may fail */
1647 oldcount = *refcount;
1648 oldflags = ifp->if_flags;
1651 * See if we aren't the only and touching refcount is enough.
1652 * Actually toggle interface flag if we are the first or last.
1657 ifp->if_flags |= flag;
1661 ifp->if_flags &= ~flag;
1664 /* Call down the driver since we've changed interface flags */
1665 if (ifp->if_ioctl == NULL) {
1669 ifr.ifr_flags = ifp->if_flags & 0xffff;
1670 ifr.ifr_flagshigh = ifp->if_flags >> 16;
1672 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
1673 IFF_UNLOCKGIANT(ifp);
1676 /* Notify userland that interface flags have changed */
1681 /* Recover after driver error */
1682 *refcount = oldcount;
1683 ifp->if_flags = oldflags;
1688 * Set/clear promiscuous mode on interface ifp based on the truth value
1689 * of pswitch. The calls are reference counted so that only the first
1690 * "on" request actually has an effect, as does the final "off" request.
1691 * Results are undefined if the "off" and "on" requests are not matched.
1694 ifpromisc(struct ifnet *ifp, int pswitch)
1697 int oldflags = ifp->if_flags;
1699 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC,
1700 &ifp->if_pcount, pswitch);
1701 /* If promiscuous mode status has changed, log a message */
1702 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC))
1703 log(LOG_INFO, "%s: promiscuous mode %s\n",
1705 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled");
1710 * Return interface configuration
1711 * of system. List may be used
1712 * in later ioctl's (above) to get
1713 * other information.
1717 ifconf(u_long cmd, caddr_t data)
1719 struct ifconf *ifc = (struct ifconf *)data;
1724 int error, full = 0, valid_len, max_len;
1726 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */
1727 max_len = MAXPHYS - 1;
1729 /* Prevent hostile input from being able to crash the system */
1730 if (ifc->ifc_len <= 0)
1734 if (ifc->ifc_len <= max_len) {
1735 max_len = ifc->ifc_len;
1738 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN);
1742 IFNET_RLOCK(); /* could sleep XXX */
1743 TAILQ_FOREACH(ifp, &ifnet, if_link) {
1747 * Zero the ifr_name buffer to make sure we don't
1748 * disclose the contents of the stack.
1750 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name));
1752 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name))
1753 >= sizeof(ifr.ifr_name))
1754 return (ENAMETOOLONG);
1757 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
1758 struct sockaddr *sa = ifa->ifa_addr;
1760 if (jailed(curthread->td_ucred) &&
1761 prison_if(curthread->td_ucred, sa))
1765 if (cmd == OSIOCGIFCONF) {
1766 struct osockaddr *osa =
1767 (struct osockaddr *)&ifr.ifr_addr;
1769 osa->sa_family = sa->sa_family;
1770 sbuf_bcat(sb, &ifr, sizeof(ifr));
1771 max_len += sizeof(ifr);
1774 if (sa->sa_len <= sizeof(*sa)) {
1776 sbuf_bcat(sb, &ifr, sizeof(ifr));
1777 max_len += sizeof(ifr);
1780 offsetof(struct ifreq, ifr_addr));
1781 max_len += offsetof(struct ifreq, ifr_addr);
1782 sbuf_bcat(sb, sa, sa->sa_len);
1783 max_len += sa->sa_len;
1786 if (!sbuf_overflowed(sb))
1787 valid_len = sbuf_len(sb);
1790 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr));
1791 sbuf_bcat(sb, &ifr, sizeof(ifr));
1792 max_len += sizeof(ifr);
1794 if (!sbuf_overflowed(sb))
1795 valid_len = sbuf_len(sb);
1801 * If we didn't allocate enough space (uncommon), try again. If
1802 * we have already allocated as much space as we are allowed,
1803 * return what we've got.
1805 if (valid_len != max_len && !full) {
1810 ifc->ifc_len = valid_len;
1812 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len);
1818 * Just like ifpromisc(), but for all-multicast-reception mode.
1821 if_allmulti(struct ifnet *ifp, int onswitch)
1824 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch));
1828 * Add a multicast listenership to the interface in question.
1829 * The link layer provides a routine which converts
1832 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, struct ifmultiaddr **retifma)
1834 struct sockaddr *llsa, *dupsa;
1836 struct ifmultiaddr *ifma;
1839 * If the matching multicast address already exists
1840 * then don't add a new one, just add a reference
1842 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1843 if (sa_equal(sa, ifma->ifma_addr)) {
1844 ifma->ifma_refcount++;
1852 * Give the link layer a chance to accept/reject it, and also
1853 * find out which AF_LINK address this maps to, if it isn't one
1856 if (ifp->if_resolvemulti != NULL) {
1857 error = ifp->if_resolvemulti(ifp, &llsa, sa);
1858 if (error) return error;
1863 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK);
1864 MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK);
1865 bcopy(sa, dupsa, sa->sa_len);
1867 ifma->ifma_addr = dupsa;
1868 ifma->ifma_lladdr = llsa;
1869 ifma->ifma_ifp = ifp;
1870 ifma->ifma_refcount = 1;
1871 ifma->ifma_protospec = NULL;
1872 rt_newmaddrmsg(RTM_NEWMADDR, ifma);
1875 * Some network interfaces can scan the address list at
1876 * interrupt time; lock them out.
1879 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1881 if (retifma != NULL)
1885 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
1886 if (sa_equal(ifma->ifma_addr, llsa))
1890 ifma->ifma_refcount++;
1892 MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma,
1893 M_IFMADDR, M_WAITOK);
1894 MALLOC(dupsa, struct sockaddr *, llsa->sa_len,
1895 M_IFMADDR, M_WAITOK);
1896 bcopy(llsa, dupsa, llsa->sa_len);
1897 ifma->ifma_addr = dupsa;
1898 ifma->ifma_lladdr = NULL;
1899 ifma->ifma_ifp = ifp;
1900 ifma->ifma_refcount = 1;
1901 ifma->ifma_protospec = NULL;
1903 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link);
1908 * We are certain we have added something, so call down to the
1909 * interface to let them know about it.
1911 if (ifp->if_ioctl != NULL) {
1914 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0);
1915 IFF_UNLOCKGIANT(ifp);
1923 * Remove a reference to a multicast address on this interface. Yell
1924 * if the request does not match an existing membership.
1927 if_delmulti(struct ifnet *ifp, struct sockaddr *sa)
1929 struct ifmultiaddr *ifma;
1932 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1933 if (sa_equal(sa, ifma->ifma_addr))
1938 if (ifma->ifma_refcount > 1) {
1939 ifma->ifma_refcount--;
1943 rt_newmaddrmsg(RTM_DELMADDR, ifma);
1944 sa = ifma->ifma_lladdr;
1946 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1948 * Make sure the interface driver is notified
1949 * in the case of a link layer mcast group being left.
1951 if (ifp->if_ioctl && ifma->ifma_addr->sa_family == AF_LINK && sa == 0) {
1953 (void) (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
1954 IFF_UNLOCKGIANT(ifp);
1957 free(ifma->ifma_addr, M_IFMADDR);
1958 free(ifma, M_IFMADDR);
1963 * Now look for the link-layer address which corresponds to
1964 * this network address. It had been squirreled away in
1965 * ifma->ifma_lladdr for this purpose (so we don't have
1966 * to call ifp->if_resolvemulti() again), and we saved that
1967 * value in sa above. If some nasty deleted the
1968 * link-layer address out from underneath us, we can deal because
1969 * the address we stored was is not the same as the one which was
1970 * in the record for the link-layer address. (So we don't complain
1973 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
1974 if (sa_equal(sa, ifma->ifma_addr))
1979 if (ifma->ifma_refcount > 1) {
1980 ifma->ifma_refcount--;
1985 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link);
1986 if (ifp->if_ioctl != NULL) {
1988 (void) (*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0);
1989 IFF_UNLOCKGIANT(ifp);
1992 free(ifma->ifma_addr, M_IFMADDR);
1993 free(sa, M_IFMADDR);
1994 free(ifma, M_IFMADDR);
2000 * Set the link layer address on an interface.
2002 * At this time we only support certain types of interfaces,
2003 * and we don't allow the length of the address to change.
2006 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len)
2008 struct sockaddr_dl *sdl;
2012 ifa = ifaddr_byindex(ifp->if_index);
2015 sdl = (struct sockaddr_dl *)ifa->ifa_addr;
2018 if (len != sdl->sdl_alen) /* don't allow length to change */
2020 switch (ifp->if_type) {
2021 case IFT_ETHER: /* these types use struct arpcom */
2027 bcopy(lladdr, IFP2ENADDR(ifp), len);
2029 * XXX We also need to store the lladdr in LLADDR(sdl),
2030 * which is done below. This is a pain because we must
2031 * remember to keep the info in sync.
2035 bcopy(lladdr, LLADDR(sdl), len);
2041 * If the interface is already up, we need
2042 * to re-init it in order to reprogram its
2045 if ((ifp->if_flags & IFF_UP) != 0) {
2046 if (ifp->if_ioctl) {
2048 ifp->if_flags &= ~IFF_UP;
2049 ifr.ifr_flags = ifp->if_flags & 0xffff;
2050 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2051 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2052 ifp->if_flags |= IFF_UP;
2053 ifr.ifr_flags = ifp->if_flags & 0xffff;
2054 ifr.ifr_flagshigh = ifp->if_flags >> 16;
2055 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr);
2056 IFF_UNLOCKGIANT(ifp);
2060 * Also send gratuitous ARPs to notify other nodes about
2061 * the address change.
2063 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
2064 if (ifa->ifa_addr != NULL &&
2065 ifa->ifa_addr->sa_family == AF_INET)
2066 arp_ifinit(ifp, ifa);
2073 struct ifmultiaddr *
2074 ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp)
2076 struct ifmultiaddr *ifma;
2078 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link)
2079 if (sa_equal(ifma->ifma_addr, sa))
2086 * The name argument must be a pointer to storage which will last as
2087 * long as the interface does. For physical devices, the result of
2088 * device_get_name(dev) is a good choice and for pseudo-devices a
2089 * static string works well.
2092 if_initname(struct ifnet *ifp, const char *name, int unit)
2094 ifp->if_dname = name;
2095 ifp->if_dunit = unit;
2096 if (unit != IF_DUNIT_NONE)
2097 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit);
2099 strlcpy(ifp->if_xname, name, IFNAMSIZ);
2103 if_printf(struct ifnet *ifp, const char * fmt, ...)
2108 retval = printf("%s: ", ifp->if_xname);
2110 retval += vprintf(fmt, ap);
2116 * When an interface is marked IFF_NEEDSGIANT, its if_start() routine cannot
2117 * be called without Giant. However, we often can't acquire the Giant lock
2118 * at those points; instead, we run it via a task queue that holds Giant via
2119 * if_start_deferred.
2121 * XXXRW: We need to make sure that the ifnet isn't fully detached until any
2122 * outstanding if_start_deferred() tasks that will run after the free. This
2123 * probably means waiting in if_detach().
2126 if_start(struct ifnet *ifp)
2131 if ((ifp->if_flags & IFF_NEEDSGIANT) != 0 && debug_mpsafenet != 0) {
2132 if (mtx_owned(&Giant))
2133 (*(ifp)->if_start)(ifp);
2135 taskqueue_enqueue(taskqueue_swi_giant,
2136 &ifp->if_starttask);
2138 (*(ifp)->if_start)(ifp);
2142 if_start_deferred(void *context, int pending)
2147 * This code must be entered with Giant, and should never run if
2148 * we're not running with debug.mpsafenet.
2150 KASSERT(debug_mpsafenet != 0, ("if_start_deferred: debug.mpsafenet"));
2154 (ifp->if_start)(ifp);
2158 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust)
2163 if (_IF_QFULL(ifq)) {
2170 ifp->if_obytes += m->m_pkthdr.len + adjust;
2171 if (m->m_flags & (M_BCAST|M_MCAST))
2173 active = ifp->if_flags & IFF_OACTIVE;
2175 _IF_ENQUEUE(ifq, m);
2177 if (ifp != NULL && !active)
2183 if_register_com_alloc(u_char type,
2184 if_com_alloc_t *a, if_com_free_t *f)
2187 KASSERT(if_com_alloc[type] == NULL,
2188 ("if_register_com_alloc: %d already registered", type));
2189 KASSERT(if_com_free[type] == NULL,
2190 ("if_register_com_alloc: %d free already registered", type));
2192 if_com_alloc[type] = a;
2193 if_com_free[type] = f;
2197 if_deregister_com_alloc(u_char type)
2200 KASSERT(if_com_alloc[type] == NULL,
2201 ("if_deregister_com_alloc: %d not registered", type));
2202 KASSERT(if_com_free[type] == NULL,
2203 ("if_deregister_com_alloc: %d free not registered", type));
2204 if_com_alloc[type] = NULL;
2205 if_com_free[type] = NULL;