2 * Copyright (C) 1999-2000 by Maksim Yevmenkin <m_evmenkin@yahoo.com>
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.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * -------------------------------------------------------------------------
29 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk>
30 * Nottingham University 1987.
34 * $FreeBSD: src/sys/net/if_tap.c,v 1.3.2.3 2002/04/14 21:41:48 luigi Exp $
35 * $Id: if_tap.c,v 0.21 2000/07/23 21:46:02 max Exp $
41 #include <sys/param.h>
43 #include <sys/device.h>
44 #include <sys/filedesc.h>
45 #include <sys/filio.h>
46 #include <sys/kernel.h>
47 #include <sys/malloc.h>
51 #include <sys/signalvar.h>
52 #include <sys/socket.h>
53 #include <sys/sockio.h>
54 #include <sys/sysctl.h>
55 #include <sys/systm.h>
56 #include <sys/ttycom.h>
58 #include <sys/vnode.h>
59 #include <sys/serialize.h>
60 #include <sys/thread2.h>
61 #include <sys/mplock2.h>
62 #include <sys/devfs.h>
63 #include <sys/queue.h>
66 #include <net/ethernet.h>
68 #include <net/if_types.h>
69 #include <net/if_arp.h>
70 #include <net/if_clone.h>
71 #include <net/if_media.h>
72 #include <net/ifq_var.h>
73 #include <net/route.h>
75 #include <netinet/in.h>
77 #include "if_tapvar.h"
80 #define TAP_IFFLAGS (IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST)
83 #define TAP_PREALLOCATED_UNITS 4
85 #define TAP_PREALLOCATED_UNITS NTAP
89 #define TAPDEBUG if (tapdebug) if_printf
92 static int tapmodevent(module_t, int, void *);
95 static struct tap_softc *tapcreate(cdev_t, int);
96 static void tapdestroy(struct tap_softc *);
99 static int tap_clone_create(struct if_clone *, int, caddr_t);
100 static int tap_clone_destroy(struct ifnet *);
102 /* network interface */
103 static void tapifinit(void *);
104 static void tapifstart(struct ifnet *, struct ifaltq_subque *);
105 static int tapifioctl(struct ifnet *, u_long, caddr_t,
107 static void tapifstop(struct tap_softc *, int);
108 static void tapifflags(struct tap_softc *);
110 /* character device */
111 static d_open_t tapopen;
112 static d_clone_t tapclone;
113 static d_close_t tapclose;
114 static d_read_t tapread;
115 static d_write_t tapwrite;
116 static d_ioctl_t tapioctl;
117 static d_kqfilter_t tapkqfilter;
119 static struct dev_ops tap_ops = {
126 .d_kqfilter = tapkqfilter
130 static void tap_filter_detach(struct knote *);
131 static int tap_filter_read(struct knote *, long);
132 static int tap_filter_write(struct knote *, long);
134 static struct filterops tapread_filtops = {
140 static struct filterops tapwrite_filtops = {
147 static int tapdebug = 0; /* debug flag */
148 static int taprefcnt = 0; /* module ref. counter */
149 static int tapuopen = 0; /* allow user open() */
150 static int tapuponopen = 0; /* IFF_UP when opened */
152 static MALLOC_DEFINE(M_TAP, TAP, "Ethernet tunnel interface");
154 static DEVFS_DEFINE_CLONE_BITMAP(tap);
156 struct if_clone tap_cloner = IF_CLONE_INITIALIZER(
157 TAP, tap_clone_create, tap_clone_destroy, 0, IF_MAXUNIT);
159 static SLIST_HEAD(,tap_softc) tap_listhead =
160 SLIST_HEAD_INITIALIZER(&tap_listhead);
162 SYSCTL_INT(_debug, OID_AUTO, if_tap_debug, CTLFLAG_RW, &tapdebug, 0, "");
163 SYSCTL_DECL(_net_link);
164 SYSCTL_NODE(_net_link, OID_AUTO, tap, CTLFLAG_RW, 0,
165 "Ethernet tunnel software network interface");
166 SYSCTL_INT(_net_link_tap, OID_AUTO, user_open, CTLFLAG_RW, &tapuopen, 0,
167 "Allow user to open /dev/tap (based on node permissions)");
168 SYSCTL_INT(_net_link_tap, OID_AUTO, up_on_open, CTLFLAG_RW, &tapuponopen, 0,
169 "Bring interface up when /dev/tap is opened");
170 SYSCTL_INT(_net_link_tap, OID_AUTO, debug, CTLFLAG_RW, &tapdebug, 0, "");
171 SYSCTL_INT(_net_link_tap, OID_AUTO, refcnt, CTLFLAG_RD, &taprefcnt, 0,
172 "Number of opened devices");
174 DEV_MODULE(if_tap, tapmodevent, NULL);
179 * module event handler
182 tapmodevent(module_t mod, int type, void *data)
184 static cdev_t dev = NULL;
185 struct tap_softc *sc, *sc_tmp;
190 dev = make_autoclone_dev(&tap_ops, &DEVFS_CLONE_BITMAP(tap),
191 tapclone, UID_ROOT, GID_WHEEL,
193 SLIST_INIT(&tap_listhead);
194 if_clone_attach(&tap_cloner);
196 for (i = 0; i < TAP_PREALLOCATED_UNITS; ++i) {
197 make_dev(&tap_ops, i, UID_ROOT, GID_WHEEL,
198 0600, "%s%d", TAP, i);
199 devfs_clone_bitmap_set(&DEVFS_CLONE_BITMAP(tap), i);
207 if_clone_detach(&tap_cloner);
209 SLIST_FOREACH_MUTABLE(sc, &tap_listhead, tap_link, sc_tmp)
212 dev_ops_remove_all(&tap_ops);
213 destroy_autoclone_dev(dev, &DEVFS_CLONE_BITMAP(tap));
225 * Create or clone an interface
227 static struct tap_softc *
228 tapcreate(cdev_t dev, int flags)
230 struct tap_softc *sc;
232 uint8_t ether_addr[ETHER_ADDR_LEN];
233 int unit = minor(dev);
235 sc = kmalloc(sizeof(*sc), M_TAP, M_WAITOK | M_ZERO);
238 sc->tap_flags |= flags;
240 reference_dev(dev); /* device association */
242 /* generate fake MAC address: 00 bd xx xx xx unit_no */
243 ether_addr[0] = 0x00;
244 ether_addr[1] = 0xbd;
245 bcopy(&ticks, ðer_addr[2], 3);
246 ether_addr[5] = (u_char)unit;
248 /* fill the rest and attach interface */
250 if_initname(ifp, TAP, unit);
251 ifp->if_type = IFT_ETHER;
252 ifp->if_init = tapifinit;
253 ifp->if_start = tapifstart;
254 ifp->if_ioctl = tapifioctl;
255 ifp->if_mtu = ETHERMTU;
256 ifp->if_flags = TAP_IFFLAGS;
258 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
259 ifq_set_ready(&ifp->if_snd);
261 ether_ifattach(ifp, ether_addr, NULL);
263 sc->tap_flags |= TAP_INITED;
264 sc->tap_devq.ifq_maxlen = ifqmaxlen;
266 SLIST_INSERT_HEAD(&tap_listhead, sc, tap_link);
268 TAPDEBUG(ifp, "created, minor = %#x, flags = 0x%x\n",
269 unit, sc->tap_flags);
273 static struct tap_softc *
276 struct tap_softc *sc;
278 SLIST_FOREACH(sc, &tap_listhead, tap_link) {
279 if (minor(sc->tap_dev) == unit)
286 * Create a new tap instance via ifconfig.
289 tap_clone_create(struct if_clone *ifc __unused, int unit,
290 caddr_t param __unused)
292 struct tap_softc *sc;
297 if (!devfs_clone_bitmap_chk(&DEVFS_CLONE_BITMAP(tap), unit)) {
298 devfs_clone_bitmap_set(&DEVFS_CLONE_BITMAP(tap), unit);
299 dev = make_dev(&tap_ops, unit, UID_ROOT, GID_WHEEL,
300 0600, "%s%d", TAP, unit);
302 dev = devfs_find_device_by_name("%s%d", TAP, unit);
307 if ((sc = tapcreate(dev, TAP_MANUALMAKE)) == NULL)
313 sc->tap_flags |= TAP_CLONE;
314 TAPDEBUG(&sc->tap_if, "clone created, minor = %#x, flags = 0x%x\n",
315 minor(dev), sc->tap_flags);
321 * Open the tap device.
324 tapopen(struct dev_open_args *ap)
327 struct tap_softc *sc = NULL;
328 struct ifnet *ifp = NULL;
332 (error = priv_check_cred(ap->a_cred, PRIV_ROOT, 0)) != 0)
336 dev = ap->a_head.a_dev;
338 if (sc == NULL && (sc = tapcreate(dev, TAP_MANUALMAKE)) == NULL) {
342 if (sc->tap_flags & TAP_OPEN) {
348 if ((sc->tap_flags & TAP_CLONE) == 0) {
349 EVENTHANDLER_INVOKE(ifnet_attach_event, ifp);
351 /* Announce the return of the interface. */
352 rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
355 bcopy(sc->arpcom.ac_enaddr, sc->ether_addr, sizeof(sc->ether_addr));
357 if (curthread->td_proc)
358 fsetown(curthread->td_proc->p_pid, &sc->tap_sigtd);
359 sc->tap_flags |= TAP_OPEN;
362 if (tapuponopen && (ifp->if_flags & IFF_UP) == 0) {
367 ifnet_serialize_all(ifp);
369 ifnet_deserialize_all(ifp);
371 sc->tap_flags |= TAP_CLOSEDOWN;
374 TAPDEBUG(ifp, "opened, minor = %#x. Module refcnt = %d\n",
375 minor(dev), taprefcnt);
382 tapclone(struct dev_clone_args *ap)
386 unit = devfs_clone_bitmap_get(&DEVFS_CLONE_BITMAP(tap), 0);
387 ap->a_dev = make_only_dev(&tap_ops, unit, UID_ROOT, GID_WHEEL,
388 0600, "%s%d", TAP, unit);
389 if (tapcreate(ap->a_dev, 0) == NULL)
396 * Close the tap device: bring the interface down & delete routing info.
399 tapclose(struct dev_close_args *ap)
401 cdev_t dev = ap->a_head.a_dev;
402 struct tap_softc *sc = dev->si_drv1;
404 int unit = minor(dev);
408 ("try closing the already destroyed %s%d", TAP, unit));
413 /* Junk all pending output */
414 ifq_purge_all(&ifp->if_snd);
417 * If the interface is not cloned, we always bring it down.
419 * If the interface is cloned, then we bring it down during
420 * closing only if it was brought up during opening.
422 if ((sc->tap_flags & TAP_CLONE) == 0 ||
423 (sc->tap_flags & TAP_CLOSEDOWN)) {
424 if (ifp->if_flags & IFF_UP)
428 ifnet_serialize_all(ifp);
429 tapifstop(sc, clear_flags);
430 ifnet_deserialize_all(ifp);
432 if ((sc->tap_flags & TAP_CLONE) == 0) {
433 if_purgeaddrs_nolink(ifp);
435 EVENTHANDLER_INVOKE(ifnet_detach_event, ifp);
437 /* Announce the departure of the interface. */
438 rt_ifannouncemsg(ifp, IFAN_DEPARTURE);
441 funsetown(&sc->tap_sigio);
442 sc->tap_sigio = NULL;
443 KNOTE(&sc->tap_rkq.ki_note, 0);
445 sc->tap_flags &= ~TAP_OPEN;
446 funsetown(&sc->tap_sigtd);
447 sc->tap_sigtd = NULL;
452 if_printf(ifp, ". Module refcnt = %d is out of sync! "
453 "Force refcnt to be 0.\n", taprefcnt);
456 TAPDEBUG(ifp, "closed, minor = %#x. Module refcnt = %d\n",
459 /* Only auto-destroy if the interface was not manually created. */
460 if ((sc->tap_flags & TAP_MANUALMAKE) == 0 &&
461 unit >= TAP_PREALLOCATED_UNITS) {
472 * Destroy a tap instance: the interface and the associated device.
475 tapdestroy(struct tap_softc *sc)
477 struct ifnet *ifp = &sc->tap_if;
478 cdev_t dev = sc->tap_dev;
479 int unit = minor(dev);
481 TAPDEBUG(ifp, "destroyed, minor = %#x. Module refcnt = %d\n",
484 ifnet_serialize_all(ifp);
486 ifnet_deserialize_all(ifp);
492 release_dev(dev); /* device disassociation */
494 /* Also destroy the cloned device */
495 if (unit >= TAP_PREALLOCATED_UNITS) {
497 devfs_clone_bitmap_put(&DEVFS_CLONE_BITMAP(tap), unit);
500 SLIST_REMOVE(&tap_listhead, sc, tap_softc, tap_link);
506 * Destroy a tap instance that is created via ifconfig.
509 tap_clone_destroy(struct ifnet *ifp)
511 struct tap_softc *sc = ifp->if_softc;
513 if (sc->tap_flags & TAP_OPEN)
515 if ((sc->tap_flags & TAP_CLONE) == 0)
518 TAPDEBUG(ifp, "clone destroyed, minor = %#x, flags = 0x%x\n",
519 minor(sc->tap_dev), sc->tap_flags);
529 * Network interface initialization function (called with if serializer held)
536 struct tap_softc *sc = xtp;
537 struct ifnet *ifp = &sc->tap_if;
538 struct ifaltq_subque *ifsq = ifq_get_subq_default(&ifp->if_snd);
540 TAPDEBUG(ifp, "initializing, minor = %#x, flags = 0x%x\n",
541 minor(sc->tap_dev), sc->tap_flags);
543 ASSERT_IFNET_SERIALIZED_ALL(ifp);
547 ifp->if_flags |= IFF_RUNNING;
548 ifsq_clr_oactive(ifsq);
550 /* attempt to start output */
551 tapifstart(ifp, ifsq);
555 tapifflags(struct tap_softc *sc)
557 struct ifnet *ifp = &sc->tap_if;
559 ASSERT_IFNET_SERIALIZED_ALL(ifp);
561 if (ifp->if_flags & IFF_UP) {
562 if ((ifp->if_flags & IFF_RUNNING) == 0)
572 * Process an ioctl request on network interface (called with if serializer
578 tapifioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
580 struct tap_softc *sc = ifp->if_softc;
581 struct ifstat *ifs = NULL;
582 struct ifmediareq *ifmr = NULL;
594 error = ether_ioctl(ifp, cmd, data);
603 * The bridge code needs this when running the
604 * spanning tree protocol.
606 ifmr = (struct ifmediareq *)data;
607 dummy = ifmr->ifm_count;
609 ifmr->ifm_status = IFM_AVALID;
610 ifmr->ifm_active = IFM_ETHER;
611 if (sc->tap_flags & TAP_OPEN)
612 ifmr->ifm_status |= IFM_ACTIVE;
613 ifmr->ifm_current = ifmr->ifm_active;
615 int media = IFM_ETHER;
616 error = copyout(&media, ifmr->ifm_ulist, sizeof(int));
621 ifs = (struct ifstat *)data;
622 dummy = strlen(ifs->ascii);
623 if ((sc->tap_flags & TAP_OPEN) && dummy < sizeof(ifs->ascii)) {
624 if (sc->tap_sigtd && sc->tap_sigtd->sio_proc) {
625 ksnprintf(ifs->ascii + dummy,
626 sizeof(ifs->ascii) - dummy,
627 "\tOpened by pid %d\n",
628 (int)sc->tap_sigtd->sio_proc->p_pid);
630 ksnprintf(ifs->ascii + dummy,
631 sizeof(ifs->ascii) - dummy,
632 "\tOpened by <unknown>\n");
648 * Queue packets from higher level ready to put out (called with if serializer
654 tapifstart(struct ifnet *ifp, struct ifaltq_subque *ifsq)
656 struct tap_softc *sc = ifp->if_softc;
661 ASSERT_ALTQ_SQ_DEFAULT(ifp, ifsq);
662 TAPDEBUG(ifp, "starting, minor = %#x\n", minor(sc->tap_dev));
664 if ((sc->tap_flags & TAP_READY) != TAP_READY) {
665 TAPDEBUG(ifp, "not ready, minor = %#x, flags = 0x%x\n",
666 minor(sc->tap_dev), sc->tap_flags);
671 ifsq_set_oactive(ifsq);
674 while ((m = ifsq_dequeue(ifsq)) != NULL) {
677 IFNET_STAT_INC(ifp, oerrors, 1);
681 IFNET_STAT_INC(ifp, opackets, 1);
687 if (sc->tap_flags & TAP_RWAIT) {
688 sc->tap_flags &= ~TAP_RWAIT;
692 KNOTE(&sc->tap_rkq.ki_note, 0);
694 if ((sc->tap_flags & TAP_ASYNC) && (sc->tap_sigio != NULL)) {
696 pgsigio(sc->tap_sigio, SIGIO, 0);
701 ifsq_clr_oactive(ifsq);
705 tapifstop(struct tap_softc *sc, int clear_flags)
707 struct ifnet *ifp = &sc->tap_if;
709 ASSERT_IFNET_SERIALIZED_ALL(ifp);
710 IF_DRAIN(&sc->tap_devq);
711 sc->tap_flags &= ~TAP_CLOSEDOWN;
713 ifp->if_flags &= ~IFF_RUNNING;
714 ifsq_clr_oactive(ifq_get_subq_default(&ifp->if_snd));
721 * The ops interface is now pretty minimal. Called via fileops with nothing
727 tapioctl(struct dev_ioctl_args *ap)
729 cdev_t dev = ap->a_head.a_dev;
730 caddr_t data = ap->a_data;
731 struct tap_softc *sc = dev->si_drv1;
732 struct ifnet *ifp = &sc->tap_if;
734 struct tapinfo *tapp = NULL;
738 ifnet_serialize_all(ifp);
743 tapp = (struct tapinfo *)data;
744 if (ifp->if_type != tapp->type)
746 ifp->if_mtu = tapp->mtu;
747 ifp->if_baudrate = tapp->baudrate;
751 tapp = (struct tapinfo *)data;
752 tapp->mtu = ifp->if_mtu;
753 tapp->type = ifp->if_type;
754 tapp->baudrate = ifp->if_baudrate;
758 ifr = (struct ifreq *)data;
759 strlcpy(ifr->ifr_name, ifp->if_xname, IFNAMSIZ);
763 tapdebug = *(int *)data;
767 *(int *)data = tapdebug;
772 sc->tap_flags |= TAP_ASYNC;
774 sc->tap_flags &= ~TAP_ASYNC;
778 /* Take a look at devq first */
779 IF_POLL(&sc->tap_devq, mb);
782 for(; mb != NULL; mb = mb->m_next)
783 *(int *)data += mb->m_len;
785 *(int *)data = ifsq_poll_pktlen(
786 ifq_get_subq_default(&ifp->if_snd));
791 error = fsetown(*(int *)data, &sc->tap_sigio);
795 *(int *)data = fgetown(&sc->tap_sigio);
798 /* this is deprecated, FIOSETOWN should be used instead */
800 error = fsetown(-(*(int *)data), &sc->tap_sigio);
803 /* this is deprecated, FIOGETOWN should be used instead */
805 *(int *)data = -fgetown(&sc->tap_sigio);
809 * Support basic control of the network interface via the device file.
810 * e.g., vke(4) currently uses the 'SIOCGIFADDR' ioctl.
814 bcopy(&ifp->if_flags, data, sizeof(ifp->if_flags));
818 bcopy(sc->ether_addr, data, sizeof(sc->ether_addr));
822 bcopy(data, sc->ether_addr, sizeof(sc->ether_addr));
830 ifnet_deserialize_all(ifp);
838 * The ops read interface - reads a packet at a time, or at
839 * least as much of a packet as can be read.
841 * Called from the fileops interface with nothing held.
846 tapread(struct dev_read_args *ap)
848 cdev_t dev = ap->a_head.a_dev;
849 struct uio *uio = ap->a_uio;
850 struct tap_softc *sc = dev->si_drv1;
851 struct ifnet *ifp = &sc->tap_if;
852 struct mbuf *m0 = NULL;
855 TAPDEBUG(ifp, "reading, minor = %#x\n", minor(dev));
857 if ((sc->tap_flags & TAP_READY) != TAP_READY) {
858 TAPDEBUG(ifp, "not ready, minor = %#x, flags = 0x%x\n",
859 minor(dev), sc->tap_flags);
864 sc->tap_flags &= ~TAP_RWAIT;
866 /* sleep until we get a packet */
868 ifnet_serialize_all(ifp);
869 IF_DEQUEUE(&sc->tap_devq, m0);
871 if (ap->a_ioflag & IO_NDELAY) {
872 ifnet_deserialize_all(ifp);
873 return (EWOULDBLOCK);
875 sc->tap_flags |= TAP_RWAIT;
876 tsleep_interlock(sc, PCATCH);
877 ifnet_deserialize_all(ifp);
878 error = tsleep(sc, PCATCH | PINTERLOCKED, "taprd", 0);
882 ifnet_deserialize_all(ifp);
884 } while (m0 == NULL);
888 /* xfer packet to user space */
889 while ((m0 != NULL) && (uio->uio_resid > 0) && (error == 0)) {
890 len = (int)szmin(uio->uio_resid, m0->m_len);
894 error = uiomove(mtod(m0, caddr_t), (size_t)len, uio);
899 TAPDEBUG(ifp, "dropping mbuf, minor = %#x\n", minor(dev));
909 * The ops write interface - an atomic write is a packet - or else!
911 * Called from the fileops interface with nothing held.
916 tapwrite(struct dev_write_args *ap)
918 cdev_t dev = ap->a_head.a_dev;
919 struct uio *uio = ap->a_uio;
920 struct tap_softc *sc = dev->si_drv1;
921 struct ifnet *ifp = &sc->tap_if;
922 struct mbuf *top = NULL, **mp = NULL, *m = NULL;
926 TAPDEBUG(ifp, "writing, minor = %#x\n", minor(dev));
928 if ((sc->tap_flags & TAP_READY) != TAP_READY) {
929 TAPDEBUG(ifp, "not ready, minor = %#x, flags = 0x%x\n",
930 minor(dev), sc->tap_flags);
934 if (uio->uio_resid == 0)
937 if (uio->uio_resid > TAPMRU) {
938 TAPDEBUG(ifp, "invalid packet len = %zu, minor = %#x\n",
939 uio->uio_resid, minor(dev));
943 tlen = uio->uio_resid;
945 /* get a header mbuf */
946 MGETHDR(m, M_WAITOK, MT_DATA);
955 while (error == 0 && uio->uio_resid > 0) {
956 m->m_len = (int)szmin(mlen, uio->uio_resid);
957 error = uiomove(mtod(m, caddr_t), (size_t)m->m_len, uio);
960 if (uio->uio_resid > 0) {
961 MGET(m, M_WAITOK, MT_DATA);
970 IFNET_STAT_INC(ifp, ierrors, 1);
976 top->m_pkthdr.len = (int)tlen;
977 top->m_pkthdr.rcvif = ifp;
980 * Ethernet bridge and bpf are handled in ether_input
982 * adjust mbuf and give packet to the ether_input
984 ifnet_serialize_all(ifp);
985 ifp->if_input(ifp, top, NULL, -1);
986 IFNET_STAT_INC(ifp, ipackets, 1); /* ibytes are counted in ether_input */
987 ifnet_deserialize_all(ifp);
994 * tapkqfilter - called from the fileops interface with nothing held
999 tapkqfilter(struct dev_kqfilter_args *ap)
1001 cdev_t dev = ap->a_head.a_dev;
1002 struct knote *kn = ap->a_kn;
1003 struct tap_softc *sc = dev->si_drv1;
1006 list = &sc->tap_rkq.ki_note;
1009 switch (kn->kn_filter) {
1011 kn->kn_fop = &tapread_filtops;
1012 kn->kn_hook = (void *)sc;
1015 kn->kn_fop = &tapwrite_filtops;
1016 kn->kn_hook = (void *)sc;
1019 ap->a_result = EOPNOTSUPP;
1023 knote_insert(list, kn);
1028 tap_filter_read(struct knote *kn, long hint)
1030 struct tap_softc *sc = (struct tap_softc *)kn->kn_hook;
1032 if (IF_QEMPTY(&sc->tap_devq) == 0) /* XXX serializer */
1039 tap_filter_write(struct knote *kn, long hint)
1041 /* Always ready for a write */
1046 tap_filter_detach(struct knote *kn)
1048 struct tap_softc *sc = (struct tap_softc *)kn->kn_hook;
1050 knote_remove(&sc->tap_rkq.ki_note, kn);