2 * Copyright 2001 Wasabi Systems, Inc.
5 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed for the NetBSD Project by
18 * Wasabi Systems, Inc.
19 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
20 * or promote products derived from this software without specific prior
23 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
37 * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
38 * All rights reserved.
40 * Redistribution and use in source and binary forms, with or without
41 * modification, are permitted provided that the following conditions
43 * 1. Redistributions of source code must retain the above copyright
44 * notice, this list of conditions and the following disclaimer.
45 * 2. Redistributions in binary form must reproduce the above copyright
46 * notice, this list of conditions and the following disclaimer in the
47 * documentation and/or other materials provided with the distribution.
48 * 3. All advertising materials mentioning features or use of this software
49 * must display the following acknowledgement:
50 * This product includes software developed by Jason L. Wright
51 * 4. The name of the author may not be used to endorse or promote products
52 * derived from this software without specific prior written permission.
54 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
55 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
56 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
57 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
58 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
59 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
60 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
62 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
63 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
64 * POSSIBILITY OF SUCH DAMAGE.
66 * $OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp $
67 * $NetBSD: if_bridge.c,v 1.31 2005/06/01 19:45:34 jdc Exp $
68 * $FreeBSD: src/sys/net/if_bridge.c,v 1.26 2005/10/13 23:05:55 thompsa Exp $
69 * $DragonFly: src/sys/net/bridge/if_bridge.c,v 1.60 2008/11/26 12:49:43 sephe Exp $
73 * Network interface bridge support.
77 * - Currently only supports Ethernet-like interfaces (Ethernet,
78 * 802.11, VLANs on Ethernet, etc.) Figure out a nice way
79 * to bridge other types of interfaces (FDDI-FDDI, and maybe
80 * consider heterogenous bridges).
83 * Bridge's route information is duplicated to each CPUs:
86 * +-----------+ +-----------+ +-----------+ +-----------+
87 * | rtnode | | rtnode | | rtnode | | rtnode |
89 * | dst eaddr | | dst eaddr | | dst eaddr | | dst eaddr |
90 * +-----------+ +-----------+ +-----------+ +-----------+
93 * | | +----------+ | |
97 * +-------------->| timeout |<-------------+
101 * We choose to put timeout and dst_ifp into shared part, so updating
102 * them will be cheaper than using message forwarding. Also there is
103 * not need to use spinlock to protect the updating: timeout and dst_ifp
104 * is not related and specific field's updating order has no importance.
105 * The cache pollution by the share part should not be heavy: in a stable
106 * setup, dst_ifp probably will be not changed in rtnode's life time,
107 * while timeout is refreshed once per second; most of the time, timeout
108 * and dst_ifp are read-only accessed.
111 * Bridge route information installation on bridge_input path:
113 * CPU0 CPU1 CPU2 CPU3
120 * ifnet0<-----------------------+
123 * rtnode exists?(Y)free nmsg :
154 * The netmsgs forwarded between protocol threads and ifnet threads are
155 * allocated with (M_WAITOK|M_NULLOK), so it will not fail under most
156 * cases (route information is too precious to be not installed :).
157 * Since multiple threads may try to install route information for the
158 * same dst eaddr, we look up route information in ifnet0. However, this
159 * looking up only need to be performed on ifnet0, which is the start
160 * point of the route information installation process.
163 * Bridge route information deleting/flushing:
165 * CPU0 CPU1 CPU2 CPU3
169 * find suitable rtnodes,
170 * mark their rtinfo dead
172 * | domsg <------------------------------------------+
175 * V fwdmsg fwdmsg fwdmsg |
176 * ifnet0 --------> ifnet1 --------> ifnet2 --------> ifnet3
177 * delete rtnodes delete rtnodes delete rtnodes delete rtnodes
178 * w/ dead rtinfo w/ dead rtinfo w/ dead rtinfo w/ dead rtinfo
181 * All deleting/flushing operations are serialized by netisr0, so each
182 * operation only reaps the route information marked dead by itself.
185 * Bridge route information adding/deleting/flushing:
186 * Since all operation is serialized by the fixed message flow between
187 * ifnet threads, it is not possible to create corrupted per-cpu route
192 * Percpu member interface list iteration with blocking operation:
193 * Since one bridge could only delete one member interface at a time and
194 * the deleted member interface is not freed after netmsg_service_sync(),
195 * following way is used to make sure that even if the certain member
196 * interface is ripped from the percpu list during the blocking operation,
197 * the iteration still could keep going:
199 * LIST_FOREACH_MUTABLE(bif, sc->sc_iflists[mycpuid], bif_next, nbif) {
200 * blocking operation;
201 * blocking operation;
204 * if (nbif != NULL && !nbif->bif_onlist) {
205 * KKASSERT(bif->bif_onlist);
206 * nbif = LIST_NEXT(bif, bif_next);
210 * As mentioned above only one member interface could be unlinked from the
211 * percpu member interface list, so either bif or nbif may be not on the list,
212 * but _not_ both. To keep the list iteration, we don't care about bif, but
213 * only nbif. Since removed member interface will only be freed after we
214 * finish our work, it is safe to access any field in an unlinked bif (here
215 * bif_onlist). If nbif is no longer on the list, then bif must be on the
216 * list, so we change nbif to the next element of bif and keep going.
219 #include "opt_inet.h"
220 #include "opt_inet6.h"
222 #include <sys/param.h>
223 #include <sys/mbuf.h>
224 #include <sys/malloc.h>
225 #include <sys/protosw.h>
226 #include <sys/systm.h>
227 #include <sys/time.h>
228 #include <sys/socket.h> /* for net/if.h */
229 #include <sys/sockio.h>
230 #include <sys/ctype.h> /* string functions */
231 #include <sys/kernel.h>
232 #include <sys/random.h>
233 #include <sys/sysctl.h>
234 #include <sys/module.h>
235 #include <sys/proc.h>
236 #include <sys/priv.h>
237 #include <sys/lock.h>
238 #include <sys/thread.h>
239 #include <sys/thread2.h>
240 #include <sys/mpipe.h>
244 #include <net/if_dl.h>
245 #include <net/if_types.h>
246 #include <net/if_var.h>
247 #include <net/pfil.h>
248 #include <net/ifq_var.h>
249 #include <net/if_clone.h>
251 #include <netinet/in.h> /* for struct arpcom */
252 #include <netinet/in_systm.h>
253 #include <netinet/in_var.h>
254 #include <netinet/ip.h>
255 #include <netinet/ip_var.h>
257 #include <netinet/ip6.h>
258 #include <netinet6/ip6_var.h>
260 #include <netinet/if_ether.h> /* for struct arpcom */
261 #include <net/bridge/if_bridgevar.h>
262 #include <net/if_llc.h>
263 #include <net/netmsg2.h>
265 #include <net/route.h>
266 #include <sys/in_cksum.h>
269 * Size of the route hash table. Must be a power of two.
271 #ifndef BRIDGE_RTHASH_SIZE
272 #define BRIDGE_RTHASH_SIZE 1024
275 #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
278 * Maximum number of addresses to cache.
280 #ifndef BRIDGE_RTABLE_MAX
281 #define BRIDGE_RTABLE_MAX 100
285 * Spanning tree defaults.
287 #define BSTP_DEFAULT_MAX_AGE (20 * 256)
288 #define BSTP_DEFAULT_HELLO_TIME (2 * 256)
289 #define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
290 #define BSTP_DEFAULT_HOLD_TIME (1 * 256)
291 #define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
292 #define BSTP_DEFAULT_PORT_PRIORITY 0x80
293 #define BSTP_DEFAULT_PATH_COST 55
296 * Timeout (in seconds) for entries learned dynamically.
298 #ifndef BRIDGE_RTABLE_TIMEOUT
299 #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
303 * Number of seconds between walks of the route list.
305 #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
306 #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
310 * List of capabilities to mask on the member interface.
312 #define BRIDGE_IFCAPS_MASK IFCAP_TXCSUM
314 typedef int (*bridge_ctl_t)(struct bridge_softc *, void *);
316 struct netmsg_brctl {
317 struct netmsg bc_nmsg;
318 bridge_ctl_t bc_func;
319 struct bridge_softc *bc_sc;
323 struct netmsg_brsaddr {
324 struct netmsg br_nmsg;
325 struct bridge_softc *br_softc;
326 struct ifnet *br_dst_if;
327 struct bridge_rtinfo *br_rtinfo;
329 uint8_t br_dst[ETHER_ADDR_LEN];
333 struct netmsg_braddbif {
334 struct netmsg br_nmsg;
335 struct bridge_softc *br_softc;
336 struct bridge_ifinfo *br_bif_info;
337 struct ifnet *br_bif_ifp;
340 struct netmsg_brdelbif {
341 struct netmsg br_nmsg;
342 struct bridge_softc *br_softc;
343 struct bridge_ifinfo *br_bif_info;
344 struct bridge_iflist_head *br_bif_list;
347 struct netmsg_brsflags {
348 struct netmsg br_nmsg;
349 struct bridge_softc *br_softc;
350 struct bridge_ifinfo *br_bif_info;
351 uint32_t br_bif_flags;
354 eventhandler_tag bridge_detach_cookie = NULL;
356 extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
357 extern int (*bridge_output_p)(struct ifnet *, struct mbuf *);
358 extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
360 static int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
362 static int bridge_clone_create(struct if_clone *, int);
363 static void bridge_clone_destroy(struct ifnet *);
365 static int bridge_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
366 static void bridge_mutecaps(struct bridge_ifinfo *, struct ifnet *, int);
367 static void bridge_ifdetach(void *, struct ifnet *);
368 static void bridge_init(void *);
369 static void bridge_stop(struct ifnet *);
370 static void bridge_start(struct ifnet *);
371 static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
372 static int bridge_output(struct ifnet *, struct mbuf *);
374 static void bridge_forward(struct bridge_softc *, struct mbuf *m);
376 static void bridge_timer_handler(struct netmsg *);
377 static void bridge_timer(void *);
379 static void bridge_start_bcast(struct bridge_softc *, struct mbuf *);
380 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
382 static void bridge_span(struct bridge_softc *, struct mbuf *);
384 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
385 struct ifnet *, uint8_t);
386 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
387 static void bridge_rtreap(struct bridge_softc *);
388 static void bridge_rtreap_async(struct bridge_softc *);
389 static void bridge_rttrim(struct bridge_softc *);
390 static int bridge_rtage_finddead(struct bridge_softc *);
391 static void bridge_rtage(struct bridge_softc *);
392 static void bridge_rtflush(struct bridge_softc *, int);
393 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
394 static int bridge_rtsaddr(struct bridge_softc *, const uint8_t *,
395 struct ifnet *, uint8_t);
396 static void bridge_rtmsg_sync(struct bridge_softc *sc);
397 static void bridge_rtreap_handler(struct netmsg *);
398 static void bridge_rtinstall_handler(struct netmsg *);
399 static int bridge_rtinstall_oncpu(struct bridge_softc *, const uint8_t *,
400 struct ifnet *, int, uint8_t, struct bridge_rtinfo **);
402 static void bridge_rtable_init(struct bridge_softc *);
403 static void bridge_rtable_fini(struct bridge_softc *);
405 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
406 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
408 static void bridge_rtnode_insert(struct bridge_softc *,
409 struct bridge_rtnode *);
410 static void bridge_rtnode_destroy(struct bridge_softc *,
411 struct bridge_rtnode *);
413 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
415 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
417 static struct bridge_iflist *bridge_lookup_member_ifinfo(struct bridge_softc *,
418 struct bridge_ifinfo *);
419 static void bridge_delete_member(struct bridge_softc *,
420 struct bridge_iflist *, int);
421 static void bridge_delete_span(struct bridge_softc *,
422 struct bridge_iflist *);
424 static int bridge_control(struct bridge_softc *, u_long,
425 bridge_ctl_t, void *);
426 static int bridge_ioctl_init(struct bridge_softc *, void *);
427 static int bridge_ioctl_stop(struct bridge_softc *, void *);
428 static int bridge_ioctl_add(struct bridge_softc *, void *);
429 static int bridge_ioctl_del(struct bridge_softc *, void *);
430 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
431 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
432 static int bridge_ioctl_scache(struct bridge_softc *, void *);
433 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
434 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
435 static int bridge_ioctl_rts(struct bridge_softc *, void *);
436 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
437 static int bridge_ioctl_sto(struct bridge_softc *, void *);
438 static int bridge_ioctl_gto(struct bridge_softc *, void *);
439 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
440 static int bridge_ioctl_flush(struct bridge_softc *, void *);
441 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
442 static int bridge_ioctl_spri(struct bridge_softc *, void *);
443 static int bridge_ioctl_ght(struct bridge_softc *, void *);
444 static int bridge_ioctl_sht(struct bridge_softc *, void *);
445 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
446 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
447 static int bridge_ioctl_gma(struct bridge_softc *, void *);
448 static int bridge_ioctl_sma(struct bridge_softc *, void *);
449 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
450 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
451 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
452 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
453 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
455 static int bridge_ip_checkbasic(struct mbuf **mp);
457 static int bridge_ip6_checkbasic(struct mbuf **mp);
459 static int bridge_fragment(struct ifnet *, struct mbuf *,
460 struct ether_header *, int, struct llc *);
461 static void bridge_enqueue_handler(struct netmsg *);
462 static void bridge_handoff(struct ifnet *, struct mbuf *);
464 static void bridge_del_bif_handler(struct netmsg *);
465 static void bridge_add_bif_handler(struct netmsg *);
466 static void bridge_set_bifflags_handler(struct netmsg *);
467 static void bridge_del_bif(struct bridge_softc *, struct bridge_ifinfo *,
468 struct bridge_iflist_head *);
469 static void bridge_add_bif(struct bridge_softc *, struct bridge_ifinfo *,
471 static void bridge_set_bifflags(struct bridge_softc *,
472 struct bridge_ifinfo *, uint32_t);
474 SYSCTL_DECL(_net_link);
475 SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
477 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
478 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
479 static int pfil_member = 1; /* run pfil hooks on the member interface */
480 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
481 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
482 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
483 &pfil_bridge, 0, "Packet filter on the bridge interface");
484 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
485 &pfil_member, 0, "Packet filter on the member interface");
487 struct bridge_control_arg {
489 struct ifbreq ifbreq;
490 struct ifbifconf ifbifconf;
491 struct ifbareq ifbareq;
492 struct ifbaconf ifbaconf;
493 struct ifbrparam ifbrparam;
500 struct bridge_control {
501 bridge_ctl_t bc_func;
506 #define BC_F_COPYIN 0x01 /* copy arguments in */
507 #define BC_F_COPYOUT 0x02 /* copy arguments out */
508 #define BC_F_SUSER 0x04 /* do super-user check */
510 const struct bridge_control bridge_control_table[] = {
511 { bridge_ioctl_add, sizeof(struct ifbreq),
512 BC_F_COPYIN|BC_F_SUSER },
513 { bridge_ioctl_del, sizeof(struct ifbreq),
514 BC_F_COPYIN|BC_F_SUSER },
516 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
517 BC_F_COPYIN|BC_F_COPYOUT },
518 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
519 BC_F_COPYIN|BC_F_SUSER },
521 { bridge_ioctl_scache, sizeof(struct ifbrparam),
522 BC_F_COPYIN|BC_F_SUSER },
523 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
526 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
527 BC_F_COPYIN|BC_F_COPYOUT },
528 { bridge_ioctl_rts, sizeof(struct ifbaconf),
529 BC_F_COPYIN|BC_F_COPYOUT },
531 { bridge_ioctl_saddr, sizeof(struct ifbareq),
532 BC_F_COPYIN|BC_F_SUSER },
534 { bridge_ioctl_sto, sizeof(struct ifbrparam),
535 BC_F_COPYIN|BC_F_SUSER },
536 { bridge_ioctl_gto, sizeof(struct ifbrparam),
539 { bridge_ioctl_daddr, sizeof(struct ifbareq),
540 BC_F_COPYIN|BC_F_SUSER },
542 { bridge_ioctl_flush, sizeof(struct ifbreq),
543 BC_F_COPYIN|BC_F_SUSER },
545 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
547 { bridge_ioctl_spri, sizeof(struct ifbrparam),
548 BC_F_COPYIN|BC_F_SUSER },
550 { bridge_ioctl_ght, sizeof(struct ifbrparam),
552 { bridge_ioctl_sht, sizeof(struct ifbrparam),
553 BC_F_COPYIN|BC_F_SUSER },
555 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
557 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
558 BC_F_COPYIN|BC_F_SUSER },
560 { bridge_ioctl_gma, sizeof(struct ifbrparam),
562 { bridge_ioctl_sma, sizeof(struct ifbrparam),
563 BC_F_COPYIN|BC_F_SUSER },
565 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
566 BC_F_COPYIN|BC_F_SUSER },
568 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
569 BC_F_COPYIN|BC_F_SUSER },
571 { bridge_ioctl_addspan, sizeof(struct ifbreq),
572 BC_F_COPYIN|BC_F_SUSER },
573 { bridge_ioctl_delspan, sizeof(struct ifbreq),
574 BC_F_COPYIN|BC_F_SUSER },
576 static const int bridge_control_table_size =
577 sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
579 LIST_HEAD(, bridge_softc) bridge_list;
581 struct if_clone bridge_cloner = IF_CLONE_INITIALIZER("bridge",
583 bridge_clone_destroy, 0, IF_MAXUNIT);
586 bridge_modevent(module_t mod, int type, void *data)
590 LIST_INIT(&bridge_list);
591 if_clone_attach(&bridge_cloner);
592 bridge_input_p = bridge_input;
593 bridge_output_p = bridge_output;
594 bridge_detach_cookie = EVENTHANDLER_REGISTER(
595 ifnet_detach_event, bridge_ifdetach, NULL,
596 EVENTHANDLER_PRI_ANY);
598 bstp_linkstate_p = bstp_linkstate;
602 if (!LIST_EMPTY(&bridge_list))
604 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
605 bridge_detach_cookie);
606 if_clone_detach(&bridge_cloner);
607 bridge_input_p = NULL;
608 bridge_output_p = NULL;
610 bstp_linkstate_p = NULL;
619 static moduledata_t bridge_mod = {
625 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
629 * bridge_clone_create:
631 * Create a new bridge instance.
634 bridge_clone_create(struct if_clone *ifc, int unit)
636 struct bridge_softc *sc;
641 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK | M_ZERO);
642 ifp = sc->sc_ifp = &sc->sc_if;
644 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
645 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
646 sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
647 sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
648 sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
649 sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
650 sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
652 /* Initialize our routing table. */
653 bridge_rtable_init(sc);
655 callout_init(&sc->sc_brcallout);
656 netmsg_init(&sc->sc_brtimemsg, &netisr_adone_rport,
657 MSGF_DROPABLE, bridge_timer_handler);
658 sc->sc_brtimemsg.nm_lmsg.u.ms_resultp = sc;
660 callout_init(&sc->sc_bstpcallout);
661 netmsg_init(&sc->sc_bstptimemsg, &netisr_adone_rport,
662 MSGF_DROPABLE, bstp_tick_handler);
663 sc->sc_bstptimemsg.nm_lmsg.u.ms_resultp = sc;
665 /* Initialize per-cpu member iface lists */
666 sc->sc_iflists = kmalloc(sizeof(*sc->sc_iflists) * ncpus,
668 for (cpu = 0; cpu < ncpus; ++cpu)
669 LIST_INIT(&sc->sc_iflists[cpu]);
671 LIST_INIT(&sc->sc_spanlist);
674 if_initname(ifp, ifc->ifc_name, unit);
675 ifp->if_mtu = ETHERMTU;
676 ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
677 ifp->if_ioctl = bridge_ioctl;
678 ifp->if_start = bridge_start;
679 ifp->if_init = bridge_init;
680 ifp->if_type = IFT_BRIDGE;
681 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
682 ifp->if_snd.ifq_maxlen = ifqmaxlen;
683 ifq_set_ready(&ifp->if_snd);
684 ifp->if_hdrlen = ETHER_HDR_LEN;
687 * Generate a random ethernet address and use the private AC:DE:48
691 bcopy(&rnd, &eaddr[0], 4); /* ETHER_ADDR_LEN == 6 */
693 bcopy(&rnd, &eaddr[2], 4); /* ETHER_ADDR_LEN == 6 */
695 eaddr[0] &= ~1; /* clear multicast bit */
696 eaddr[0] |= 2; /* set the LAA bit */
698 ether_ifattach(ifp, eaddr, NULL);
699 /* Now undo some of the damage... */
700 ifp->if_baudrate = 0;
701 ifp->if_type = IFT_BRIDGE;
703 crit_enter(); /* XXX MP */
704 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
711 bridge_delete_dispatch(struct netmsg *nmsg)
713 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
714 struct bridge_softc *sc = lmsg->u.ms_resultp;
715 struct ifnet *bifp = sc->sc_ifp;
716 struct bridge_iflist *bif;
718 lwkt_serialize_enter(bifp->if_serializer);
720 while ((bif = LIST_FIRST(&sc->sc_iflists[mycpuid])) != NULL)
721 bridge_delete_member(sc, bif, 0);
723 while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL)
724 bridge_delete_span(sc, bif);
726 lwkt_serialize_exit(bifp->if_serializer);
728 lwkt_replymsg(lmsg, 0);
732 * bridge_clone_destroy:
734 * Destroy a bridge instance.
737 bridge_clone_destroy(struct ifnet *ifp)
739 struct bridge_softc *sc = ifp->if_softc;
740 struct lwkt_msg *lmsg;
743 lwkt_serialize_enter(ifp->if_serializer);
746 ifp->if_flags &= ~IFF_UP;
748 lwkt_serialize_exit(ifp->if_serializer);
750 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_delete_dispatch);
751 lmsg = &nmsg.nm_lmsg;
752 lmsg->u.ms_resultp = sc;
753 lwkt_domsg(BRIDGE_CFGPORT, lmsg, 0);
755 crit_enter(); /* XXX MP */
756 LIST_REMOVE(sc, sc_list);
761 /* Tear down the routing table. */
762 bridge_rtable_fini(sc);
764 /* Free per-cpu member iface lists */
765 kfree(sc->sc_iflists, M_DEVBUF);
773 * Handle a control request from the operator.
776 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
778 struct bridge_softc *sc = ifp->if_softc;
779 struct bridge_control_arg args;
780 struct ifdrv *ifd = (struct ifdrv *) data;
781 const struct bridge_control *bc;
784 ASSERT_SERIALIZED(ifp->if_serializer);
793 if (ifd->ifd_cmd >= bridge_control_table_size) {
797 bc = &bridge_control_table[ifd->ifd_cmd];
799 if (cmd == SIOCGDRVSPEC &&
800 (bc->bc_flags & BC_F_COPYOUT) == 0) {
803 } else if (cmd == SIOCSDRVSPEC &&
804 (bc->bc_flags & BC_F_COPYOUT)) {
809 if (bc->bc_flags & BC_F_SUSER) {
810 error = priv_check_cred(cr, PRIV_ROOT, NULL_CRED_OKAY);
815 if (ifd->ifd_len != bc->bc_argsize ||
816 ifd->ifd_len > sizeof(args.bca_u)) {
821 memset(&args, 0, sizeof(args));
822 if (bc->bc_flags & BC_F_COPYIN) {
823 error = copyin(ifd->ifd_data, &args.bca_u,
829 error = bridge_control(sc, cmd, bc->bc_func, &args);
831 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
835 if (bc->bc_flags & BC_F_COPYOUT) {
836 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
837 if (args.bca_len != 0) {
838 KKASSERT(args.bca_kptr != NULL);
840 error = copyout(args.bca_kptr,
841 args.bca_uptr, args.bca_len);
843 kfree(args.bca_kptr, M_TEMP);
845 KKASSERT(args.bca_kptr == NULL);
848 KKASSERT(args.bca_len == 0 && args.bca_kptr == NULL);
853 if (!(ifp->if_flags & IFF_UP) &&
854 (ifp->if_flags & IFF_RUNNING)) {
856 * If interface is marked down and it is running,
860 } else if ((ifp->if_flags & IFF_UP) &&
861 !(ifp->if_flags & IFF_RUNNING)) {
863 * If interface is marked up and it is stopped, then
871 /* Do not allow the MTU to be changed on the bridge */
876 error = ether_ioctl(ifp, cmd, data);
885 * Clear or restore unwanted capabilities on the member interface
888 bridge_mutecaps(struct bridge_ifinfo *bif_info, struct ifnet *ifp, int mute)
893 if (ifp->if_ioctl == NULL)
896 bzero(&ifr, sizeof(ifr));
897 ifr.ifr_reqcap = ifp->if_capenable;
900 /* mask off and save capabilities */
901 bif_info->bifi_mutecap = ifr.ifr_reqcap & BRIDGE_IFCAPS_MASK;
902 if (bif_info->bifi_mutecap != 0)
903 ifr.ifr_reqcap &= ~BRIDGE_IFCAPS_MASK;
905 /* restore muted capabilities */
906 ifr.ifr_reqcap |= bif_info->bifi_mutecap;
909 if (bif_info->bifi_mutecap != 0) {
910 lwkt_serialize_enter(ifp->if_serializer);
911 error = ifp->if_ioctl(ifp, SIOCSIFCAP, (caddr_t)&ifr, NULL);
912 lwkt_serialize_exit(ifp->if_serializer);
917 * bridge_lookup_member:
919 * Lookup a bridge member interface.
921 static struct bridge_iflist *
922 bridge_lookup_member(struct bridge_softc *sc, const char *name)
924 struct bridge_iflist *bif;
926 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
927 if (strcmp(bif->bif_ifp->if_xname, name) == 0)
934 * bridge_lookup_member_if:
936 * Lookup a bridge member interface by ifnet*.
938 static struct bridge_iflist *
939 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
941 struct bridge_iflist *bif;
943 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
944 if (bif->bif_ifp == member_ifp)
951 * bridge_lookup_member_ifinfo:
953 * Lookup a bridge member interface by bridge_ifinfo.
955 static struct bridge_iflist *
956 bridge_lookup_member_ifinfo(struct bridge_softc *sc,
957 struct bridge_ifinfo *bif_info)
959 struct bridge_iflist *bif;
961 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
962 if (bif->bif_info == bif_info)
969 * bridge_delete_member:
971 * Delete the specified member interface.
974 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
977 struct ifnet *ifs = bif->bif_ifp;
978 struct ifnet *bifp = sc->sc_ifp;
979 struct bridge_ifinfo *bif_info = bif->bif_info;
980 struct bridge_iflist_head saved_bifs;
982 ASSERT_SERIALIZED(bifp->if_serializer);
983 KKASSERT(bif_info != NULL);
985 ifs->if_bridge = NULL;
988 * Release bridge interface's serializer:
989 * - To avoid possible dead lock.
990 * - Various sync operation will block the current thread.
992 lwkt_serialize_exit(bifp->if_serializer);
995 switch (ifs->if_type) {
999 * Take the interface out of promiscuous mode.
1002 bridge_mutecaps(bif_info, ifs, 0);
1009 panic("bridge_delete_member: impossible");
1015 * Remove bifs from percpu linked list.
1017 * Removed bifs are not freed immediately, instead,
1018 * they are saved in saved_bifs. They will be freed
1019 * after we make sure that no one is accessing them,
1020 * i.e. after following netmsg_service_sync()
1022 LIST_INIT(&saved_bifs);
1023 bridge_del_bif(sc, bif_info, &saved_bifs);
1026 * Make sure that all protocol threads:
1027 * o see 'ifs' if_bridge is changed
1028 * o know that bif is removed from the percpu linked list
1030 netmsg_service_sync();
1033 * Free the removed bifs
1035 KKASSERT(!LIST_EMPTY(&saved_bifs));
1036 while ((bif = LIST_FIRST(&saved_bifs)) != NULL) {
1037 LIST_REMOVE(bif, bif_next);
1038 kfree(bif, M_DEVBUF);
1041 /* See the comment in bridge_ioctl_stop() */
1042 bridge_rtmsg_sync(sc);
1043 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL | IFBF_FLUSHSYNC);
1045 lwkt_serialize_enter(bifp->if_serializer);
1047 if (bifp->if_flags & IFF_RUNNING)
1048 bstp_initialization(sc);
1051 * Free the bif_info after bstp_initialization(), so that
1052 * bridge_softc.sc_root_port will not reference a dangling
1055 kfree(bif_info, M_DEVBUF);
1059 * bridge_delete_span:
1061 * Delete the specified span interface.
1064 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
1066 KASSERT(bif->bif_ifp->if_bridge == NULL,
1067 ("%s: not a span interface", __func__));
1069 LIST_REMOVE(bif, bif_next);
1070 kfree(bif, M_DEVBUF);
1074 bridge_ioctl_init(struct bridge_softc *sc, void *arg __unused)
1076 struct ifnet *ifp = sc->sc_ifp;
1078 if (ifp->if_flags & IFF_RUNNING)
1081 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1084 ifp->if_flags |= IFF_RUNNING;
1085 bstp_initialization(sc);
1090 bridge_ioctl_stop(struct bridge_softc *sc, void *arg __unused)
1092 struct ifnet *ifp = sc->sc_ifp;
1093 struct lwkt_msg *lmsg;
1095 if ((ifp->if_flags & IFF_RUNNING) == 0)
1098 callout_stop(&sc->sc_brcallout);
1101 lmsg = &sc->sc_brtimemsg.nm_lmsg;
1102 if ((lmsg->ms_flags & MSGF_DONE) == 0) {
1103 /* Pending to be processed; drop it */
1110 ifp->if_flags &= ~IFF_RUNNING;
1112 lwkt_serialize_exit(ifp->if_serializer);
1114 /* Let everyone know that we are stopped */
1115 netmsg_service_sync();
1118 * Sync ifnetX msgports in the order we forward rtnode
1119 * installation message. This is used to make sure that
1120 * all rtnode installation messages sent by bridge_rtupdate()
1121 * during above netmsg_service_sync() are flushed.
1123 bridge_rtmsg_sync(sc);
1124 bridge_rtflush(sc, IFBF_FLUSHDYN | IFBF_FLUSHSYNC);
1126 lwkt_serialize_enter(ifp->if_serializer);
1131 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
1133 struct ifbreq *req = arg;
1134 struct bridge_iflist *bif;
1135 struct bridge_ifinfo *bif_info;
1136 struct ifnet *ifs, *bifp;
1140 ASSERT_SERIALIZED(bifp->if_serializer);
1142 ifs = ifunit(req->ifbr_ifsname);
1146 /* If it's in the span list, it can't be a member. */
1147 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1148 if (ifs == bif->bif_ifp)
1151 /* Allow the first Ethernet member to define the MTU */
1152 if (ifs->if_type != IFT_GIF) {
1153 if (LIST_EMPTY(&sc->sc_iflists[mycpuid])) {
1154 bifp->if_mtu = ifs->if_mtu;
1155 } else if (bifp->if_mtu != ifs->if_mtu) {
1156 if_printf(bifp, "invalid MTU for %s\n", ifs->if_xname);
1161 if (ifs->if_bridge == sc)
1164 if (ifs->if_bridge != NULL)
1167 bif_info = kmalloc(sizeof(*bif_info), M_DEVBUF, M_WAITOK | M_ZERO);
1168 bif_info->bifi_priority = BSTP_DEFAULT_PORT_PRIORITY;
1169 bif_info->bifi_path_cost = BSTP_DEFAULT_PATH_COST;
1170 bif_info->bifi_ifp = ifs;
1173 * Release bridge interface's serializer:
1174 * - To avoid possible dead lock.
1175 * - Various sync operation will block the current thread.
1177 lwkt_serialize_exit(bifp->if_serializer);
1179 switch (ifs->if_type) {
1183 * Place the interface into promiscuous mode.
1185 error = ifpromisc(ifs, 1);
1187 lwkt_serialize_enter(bifp->if_serializer);
1190 bridge_mutecaps(bif_info, ifs, 1);
1193 case IFT_GIF: /* :^) */
1198 lwkt_serialize_enter(bifp->if_serializer);
1203 * Add bifs to percpu linked lists
1205 bridge_add_bif(sc, bif_info, ifs);
1207 lwkt_serialize_enter(bifp->if_serializer);
1209 if (bifp->if_flags & IFF_RUNNING)
1210 bstp_initialization(sc);
1215 * Everything has been setup, so let the member interface
1216 * deliver packets to this bridge on its input/output path.
1218 ifs->if_bridge = sc;
1221 if (bif_info != NULL)
1222 kfree(bif_info, M_DEVBUF);
1228 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
1230 struct ifbreq *req = arg;
1231 struct bridge_iflist *bif;
1233 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1237 bridge_delete_member(sc, bif, 0);
1243 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
1245 struct ifbreq *req = arg;
1246 struct bridge_iflist *bif;
1248 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1252 req->ifbr_ifsflags = bif->bif_flags;
1253 req->ifbr_state = bif->bif_state;
1254 req->ifbr_priority = bif->bif_priority;
1255 req->ifbr_path_cost = bif->bif_path_cost;
1256 req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1262 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
1264 struct ifbreq *req = arg;
1265 struct bridge_iflist *bif;
1266 struct ifnet *bifp = sc->sc_ifp;
1268 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1272 if (req->ifbr_ifsflags & IFBIF_SPAN) {
1273 /* SPAN is readonly */
1277 if (req->ifbr_ifsflags & IFBIF_STP) {
1278 switch (bif->bif_ifp->if_type) {
1280 /* These can do spanning tree. */
1284 /* Nothing else can. */
1289 lwkt_serialize_exit(bifp->if_serializer);
1290 bridge_set_bifflags(sc, bif->bif_info, req->ifbr_ifsflags);
1291 lwkt_serialize_enter(bifp->if_serializer);
1293 if (bifp->if_flags & IFF_RUNNING)
1294 bstp_initialization(sc);
1300 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1302 struct ifbrparam *param = arg;
1303 struct ifnet *ifp = sc->sc_ifp;
1305 sc->sc_brtmax = param->ifbrp_csize;
1307 lwkt_serialize_exit(ifp->if_serializer);
1309 lwkt_serialize_enter(ifp->if_serializer);
1315 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1317 struct ifbrparam *param = arg;
1319 param->ifbrp_csize = sc->sc_brtmax;
1325 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1327 struct bridge_control_arg *bc_arg = arg;
1328 struct ifbifconf *bifc = arg;
1329 struct bridge_iflist *bif;
1330 struct ifbreq *breq;
1334 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next)
1336 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1339 if (bifc->ifbic_len == 0) {
1340 bifc->ifbic_len = sizeof(*breq) * count;
1342 } else if (count == 0 || bifc->ifbic_len < sizeof(*breq)) {
1343 bifc->ifbic_len = 0;
1347 len = min(bifc->ifbic_len, sizeof(*breq) * count);
1348 KKASSERT(len >= sizeof(*breq));
1350 breq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
1352 bifc->ifbic_len = 0;
1355 bc_arg->bca_kptr = breq;
1358 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1359 if (len < sizeof(*breq))
1362 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1363 sizeof(breq->ifbr_ifsname));
1364 breq->ifbr_ifsflags = bif->bif_flags;
1365 breq->ifbr_state = bif->bif_state;
1366 breq->ifbr_priority = bif->bif_priority;
1367 breq->ifbr_path_cost = bif->bif_path_cost;
1368 breq->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1371 len -= sizeof(*breq);
1373 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1374 if (len < sizeof(*breq))
1377 strlcpy(breq->ifbr_ifsname, bif->bif_ifp->if_xname,
1378 sizeof(breq->ifbr_ifsname));
1379 breq->ifbr_ifsflags = bif->bif_flags;
1380 breq->ifbr_portno = bif->bif_ifp->if_index & 0xff;
1383 len -= sizeof(*breq);
1386 bifc->ifbic_len = sizeof(*breq) * count;
1387 KKASSERT(bifc->ifbic_len > 0);
1389 bc_arg->bca_len = bifc->ifbic_len;
1390 bc_arg->bca_uptr = bifc->ifbic_req;
1395 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1397 struct bridge_control_arg *bc_arg = arg;
1398 struct ifbaconf *bac = arg;
1399 struct bridge_rtnode *brt;
1400 struct ifbareq *bareq;
1404 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list)
1407 if (bac->ifbac_len == 0) {
1408 bac->ifbac_len = sizeof(*bareq) * count;
1410 } else if (count == 0 || bac->ifbac_len < sizeof(*bareq)) {
1415 len = min(bac->ifbac_len, sizeof(*bareq) * count);
1416 KKASSERT(len >= sizeof(*bareq));
1418 bareq = kmalloc(len, M_TEMP, M_WAITOK | M_NULLOK | M_ZERO);
1419 if (bareq == NULL) {
1423 bc_arg->bca_kptr = bareq;
1426 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
1427 struct bridge_rtinfo *bri = brt->brt_info;
1428 unsigned long expire;
1430 if (len < sizeof(*bareq))
1433 strlcpy(bareq->ifba_ifsname, bri->bri_ifp->if_xname,
1434 sizeof(bareq->ifba_ifsname));
1435 memcpy(bareq->ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1436 expire = bri->bri_expire;
1437 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1438 time_second < expire)
1439 bareq->ifba_expire = expire - time_second;
1441 bareq->ifba_expire = 0;
1442 bareq->ifba_flags = bri->bri_flags;
1445 len -= sizeof(*bareq);
1448 bac->ifbac_len = sizeof(*bareq) * count;
1449 KKASSERT(bac->ifbac_len > 0);
1451 bc_arg->bca_len = bac->ifbac_len;
1452 bc_arg->bca_uptr = bac->ifbac_req;
1457 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1459 struct ifbareq *req = arg;
1460 struct bridge_iflist *bif;
1461 struct ifnet *ifp = sc->sc_ifp;
1464 ASSERT_SERIALIZED(ifp->if_serializer);
1466 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1470 lwkt_serialize_exit(ifp->if_serializer);
1471 error = bridge_rtsaddr(sc, req->ifba_dst, bif->bif_ifp,
1473 lwkt_serialize_enter(ifp->if_serializer);
1478 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1480 struct ifbrparam *param = arg;
1482 sc->sc_brttimeout = param->ifbrp_ctime;
1488 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1490 struct ifbrparam *param = arg;
1492 param->ifbrp_ctime = sc->sc_brttimeout;
1498 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1500 struct ifbareq *req = arg;
1501 struct ifnet *ifp = sc->sc_ifp;
1504 lwkt_serialize_exit(ifp->if_serializer);
1505 error = bridge_rtdaddr(sc, req->ifba_dst);
1506 lwkt_serialize_enter(ifp->if_serializer);
1511 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1513 struct ifbreq *req = arg;
1514 struct ifnet *ifp = sc->sc_ifp;
1516 lwkt_serialize_exit(ifp->if_serializer);
1517 bridge_rtflush(sc, req->ifbr_ifsflags | IFBF_FLUSHSYNC);
1518 lwkt_serialize_enter(ifp->if_serializer);
1524 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1526 struct ifbrparam *param = arg;
1528 param->ifbrp_prio = sc->sc_bridge_priority;
1534 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1536 struct ifbrparam *param = arg;
1538 sc->sc_bridge_priority = param->ifbrp_prio;
1540 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1541 bstp_initialization(sc);
1547 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1549 struct ifbrparam *param = arg;
1551 param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
1557 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1559 struct ifbrparam *param = arg;
1561 if (param->ifbrp_hellotime == 0)
1563 sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
1565 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1566 bstp_initialization(sc);
1572 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1574 struct ifbrparam *param = arg;
1576 param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
1582 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1584 struct ifbrparam *param = arg;
1586 if (param->ifbrp_fwddelay == 0)
1588 sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
1590 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1591 bstp_initialization(sc);
1597 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1599 struct ifbrparam *param = arg;
1601 param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
1607 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1609 struct ifbrparam *param = arg;
1611 if (param->ifbrp_maxage == 0)
1613 sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
1615 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1616 bstp_initialization(sc);
1622 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1624 struct ifbreq *req = arg;
1625 struct bridge_iflist *bif;
1627 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1631 bif->bif_priority = req->ifbr_priority;
1633 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1634 bstp_initialization(sc);
1640 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1642 struct ifbreq *req = arg;
1643 struct bridge_iflist *bif;
1645 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1649 bif->bif_path_cost = req->ifbr_path_cost;
1651 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1652 bstp_initialization(sc);
1658 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1660 struct ifbreq *req = arg;
1661 struct bridge_iflist *bif;
1664 ifs = ifunit(req->ifbr_ifsname);
1668 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1669 if (ifs == bif->bif_ifp)
1672 if (ifs->if_bridge != NULL)
1675 switch (ifs->if_type) {
1685 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK | M_ZERO);
1687 bif->bif_flags = IFBIF_SPAN;
1688 /* NOTE: span bif does not need bridge_ifinfo */
1690 LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1698 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1700 struct ifbreq *req = arg;
1701 struct bridge_iflist *bif;
1704 ifs = ifunit(req->ifbr_ifsname);
1708 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1709 if (ifs == bif->bif_ifp)
1715 bridge_delete_span(sc, bif);
1717 if (LIST_EMPTY(&sc->sc_spanlist))
1724 bridge_ifdetach_dispatch(struct netmsg *nmsg)
1726 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
1727 struct ifnet *ifp, *bifp;
1728 struct bridge_softc *sc;
1729 struct bridge_iflist *bif;
1731 ifp = lmsg->u.ms_resultp;
1732 sc = ifp->if_bridge;
1734 /* Check if the interface is a bridge member */
1738 lwkt_serialize_enter(bifp->if_serializer);
1740 bif = bridge_lookup_member_if(sc, ifp);
1742 bridge_delete_member(sc, bif, 1);
1744 /* XXX Why bif will be NULL? */
1747 lwkt_serialize_exit(bifp->if_serializer);
1751 crit_enter(); /* XXX MP */
1753 /* Check if the interface is a span port */
1754 LIST_FOREACH(sc, &bridge_list, sc_list) {
1757 lwkt_serialize_enter(bifp->if_serializer);
1759 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1760 if (ifp == bif->bif_ifp) {
1761 bridge_delete_span(sc, bif);
1765 lwkt_serialize_exit(bifp->if_serializer);
1771 lwkt_replymsg(lmsg, 0);
1777 * Detach an interface from a bridge. Called when a member
1778 * interface is detaching.
1781 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1783 struct lwkt_msg *lmsg;
1786 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_ifdetach_dispatch);
1787 lmsg = &nmsg.nm_lmsg;
1788 lmsg->u.ms_resultp = ifp;
1790 lwkt_domsg(BRIDGE_CFGPORT, lmsg, 0);
1796 * Initialize a bridge interface.
1799 bridge_init(void *xsc)
1801 bridge_control(xsc, SIOCSIFFLAGS, bridge_ioctl_init, NULL);
1807 * Stop the bridge interface.
1810 bridge_stop(struct ifnet *ifp)
1812 bridge_control(ifp->if_softc, SIOCSIFFLAGS, bridge_ioctl_stop, NULL);
1818 * Enqueue a packet on a bridge member interface.
1822 bridge_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
1824 struct netmsg_packet *nmp;
1826 nmp = &m->m_hdr.mh_netmsg;
1827 netmsg_init(&nmp->nm_netmsg, &netisr_apanic_rport, 0,
1828 bridge_enqueue_handler);
1830 nmp->nm_netmsg.nm_lmsg.u.ms_resultp = dst_ifp;
1832 lwkt_sendmsg(curnetport, &nmp->nm_netmsg.nm_lmsg);
1838 * Send output from a bridge member interface. This
1839 * performs the bridging function for locally originated
1842 * The mbuf has the Ethernet header already attached. We must
1843 * enqueue or free the mbuf before returning.
1846 bridge_output(struct ifnet *ifp, struct mbuf *m)
1848 struct bridge_softc *sc = ifp->if_bridge;
1849 struct ether_header *eh;
1850 struct ifnet *dst_if, *bifp;
1852 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
1855 * Make sure that we are still a member of a bridge interface.
1863 if (m->m_len < ETHER_HDR_LEN) {
1864 m = m_pullup(m, ETHER_HDR_LEN);
1868 eh = mtod(m, struct ether_header *);
1871 * If bridge is down, but the original output interface is up,
1872 * go ahead and send out that interface. Otherwise, the packet
1875 if ((bifp->if_flags & IFF_RUNNING) == 0) {
1881 * If the packet is a multicast, or we don't know a better way to
1882 * get there, send to all interfaces.
1884 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1887 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1888 if (dst_if == NULL) {
1889 struct bridge_iflist *bif, *nbif;
1896 LIST_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid],
1898 dst_if = bif->bif_ifp;
1899 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1903 * If this is not the original output interface,
1904 * and the interface is participating in spanning
1905 * tree, make sure the port is in a state that
1906 * allows forwarding.
1908 if (dst_if != ifp &&
1909 (bif->bif_flags & IFBIF_STP) != 0) {
1910 switch (bif->bif_state) {
1911 case BSTP_IFSTATE_BLOCKING:
1912 case BSTP_IFSTATE_LISTENING:
1913 case BSTP_IFSTATE_DISABLED:
1918 if (LIST_NEXT(bif, bif_next) == NULL) {
1922 mc = m_copypacket(m, MB_DONTWAIT);
1928 bridge_handoff(dst_if, mc);
1930 if (nbif != NULL && !nbif->bif_onlist) {
1931 KKASSERT(bif->bif_onlist);
1932 nbif = LIST_NEXT(bif, bif_next);
1942 * XXX Spanning tree consideration here?
1946 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1949 bridge_handoff(dst_if, m);
1956 * Start output on a bridge.
1960 bridge_start(struct ifnet *ifp)
1962 struct bridge_softc *sc = ifp->if_softc;
1964 ASSERT_SERIALIZED(ifp->if_serializer);
1966 ifp->if_flags |= IFF_OACTIVE;
1968 struct ifnet *dst_if = NULL;
1969 struct ether_header *eh;
1972 m = ifq_dequeue(&ifp->if_snd, NULL);
1976 if (m->m_len < sizeof(*eh)) {
1977 m = m_pullup(m, sizeof(*eh));
1983 eh = mtod(m, struct ether_header *);
1988 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0)
1989 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1992 bridge_start_bcast(sc, m);
1994 bridge_enqueue(dst_if, m);
1996 ifp->if_flags &= ~IFF_OACTIVE;
2002 * The forwarding function of the bridge.
2005 bridge_forward(struct bridge_softc *sc, struct mbuf *m)
2007 struct bridge_iflist *bif;
2008 struct ifnet *src_if, *dst_if, *ifp;
2009 struct ether_header *eh;
2011 src_if = m->m_pkthdr.rcvif;
2014 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
2017 ifp->if_ibytes += m->m_pkthdr.len;
2020 * Look up the bridge_iflist.
2022 bif = bridge_lookup_member_if(sc, src_if);
2024 /* Interface is not a bridge member (anymore?) */
2029 if (bif->bif_flags & IFBIF_STP) {
2030 switch (bif->bif_state) {
2031 case BSTP_IFSTATE_BLOCKING:
2032 case BSTP_IFSTATE_LISTENING:
2033 case BSTP_IFSTATE_DISABLED:
2039 eh = mtod(m, struct ether_header *);
2042 * If the interface is learning, and the source
2043 * address is valid and not multicast, record
2046 if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
2047 ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
2048 (eh->ether_shost[0] == 0 &&
2049 eh->ether_shost[1] == 0 &&
2050 eh->ether_shost[2] == 0 &&
2051 eh->ether_shost[3] == 0 &&
2052 eh->ether_shost[4] == 0 &&
2053 eh->ether_shost[5] == 0) == 0)
2054 bridge_rtupdate(sc, eh->ether_shost, src_if, IFBAF_DYNAMIC);
2056 if ((bif->bif_flags & IFBIF_STP) != 0 &&
2057 bif->bif_state == BSTP_IFSTATE_LEARNING) {
2063 * At this point, the port either doesn't participate
2064 * in spanning tree or it is in the forwarding state.
2068 * If the packet is unicast, destined for someone on
2069 * "this" side of the bridge, drop it.
2071 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2072 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
2073 if (src_if == dst_if) {
2078 /* ...forward it to all interfaces. */
2083 if (dst_if == NULL) {
2084 bridge_broadcast(sc, src_if, m);
2089 * At this point, we're dealing with a unicast frame
2090 * going to a different interface.
2092 if ((dst_if->if_flags & IFF_RUNNING) == 0) {
2096 bif = bridge_lookup_member_if(sc, dst_if);
2098 /* Not a member of the bridge (anymore?) */
2103 if (bif->bif_flags & IFBIF_STP) {
2104 switch (bif->bif_state) {
2105 case BSTP_IFSTATE_DISABLED:
2106 case BSTP_IFSTATE_BLOCKING:
2112 if (inet_pfil_hook.ph_hashooks > 0
2114 || inet6_pfil_hook.ph_hashooks > 0
2117 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
2122 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
2127 bridge_handoff(dst_if, m);
2133 * Receive input from a member interface. Queue the packet for
2134 * bridging if it is not for us.
2136 static struct mbuf *
2137 bridge_input(struct ifnet *ifp, struct mbuf *m)
2139 struct bridge_softc *sc = ifp->if_bridge;
2140 struct bridge_iflist *bif;
2141 struct ifnet *bifp, *new_ifp;
2142 struct ether_header *eh;
2143 struct mbuf *mc, *mc2;
2145 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
2148 * Make sure that we are still a member of a bridge interface.
2156 if ((bifp->if_flags & IFF_RUNNING) == 0)
2160 * Implement support for bridge monitoring. If this flag has been
2161 * set on this interface, discard the packet once we push it through
2162 * the bpf(4) machinery, but before we do, increment various counters
2163 * associated with this bridge.
2165 if (bifp->if_flags & IFF_MONITOR) {
2166 /* Change input interface to this bridge */
2167 m->m_pkthdr.rcvif = bifp;
2171 /* Update bridge's ifnet statistics */
2172 bifp->if_ipackets++;
2173 bifp->if_ibytes += m->m_pkthdr.len;
2174 if (m->m_flags & (M_MCAST | M_BCAST))
2182 eh = mtod(m, struct ether_header *);
2184 m->m_flags &= ~M_PROTO1; /* XXX Hack - loop prevention */
2186 if (memcmp(eh->ether_dhost, IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
2188 * If the packet is for us, set the packets source as the
2189 * bridge, and return the packet back to ifnet.if_input for
2192 KASSERT(bifp->if_bridge == NULL,
2193 ("loop created in bridge_input"));
2199 * Tap all packets arriving on the bridge, no matter if
2200 * they are local destinations or not. In is in.
2204 bif = bridge_lookup_member_if(sc, ifp);
2211 if (m->m_flags & (M_BCAST | M_MCAST)) {
2212 /* Tap off 802.1D packets; they do not get forwarded. */
2213 if (memcmp(eh->ether_dhost, bstp_etheraddr,
2214 ETHER_ADDR_LEN) == 0) {
2215 lwkt_serialize_enter(bifp->if_serializer);
2216 bstp_input(sc, bif, m);
2217 lwkt_serialize_exit(bifp->if_serializer);
2219 /* m is freed by bstp_input */
2224 if (bif->bif_flags & IFBIF_STP) {
2225 switch (bif->bif_state) {
2226 case BSTP_IFSTATE_BLOCKING:
2227 case BSTP_IFSTATE_LISTENING:
2228 case BSTP_IFSTATE_DISABLED:
2234 * Make a deep copy of the packet and enqueue the copy
2235 * for bridge processing; return the original packet for
2238 mc = m_dup(m, MB_DONTWAIT);
2242 bridge_forward(sc, mc);
2245 * Reinject the mbuf as arriving on the bridge so we have a
2246 * chance at claiming multicast packets. We can not loop back
2247 * here from ether_input as a bridge is never a member of a
2250 KASSERT(bifp->if_bridge == NULL,
2251 ("loop created in bridge_input"));
2252 mc2 = m_dup(m, MB_DONTWAIT);
2255 /* Keep the layer3 header aligned */
2256 int i = min(mc2->m_pkthdr.len, max_protohdr);
2257 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
2262 * Don't tap to bpf(4) again; we have
2263 * already done the tapping.
2265 ether_reinput_oncpu(bifp, mc2, 0);
2268 /* Return the original packet for local processing. */
2272 if (bif->bif_flags & IFBIF_STP) {
2273 switch (bif->bif_state) {
2274 case BSTP_IFSTATE_BLOCKING:
2275 case BSTP_IFSTATE_LISTENING:
2276 case BSTP_IFSTATE_DISABLED:
2282 * Unicast. Make sure it's not for us.
2284 * This loop is MPSAFE; the only blocking operation (bridge_rtupdate)
2285 * is followed by breaking out of the loop.
2287 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
2288 if (bif->bif_ifp->if_type != IFT_ETHER)
2291 /* It is destined for us. */
2292 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_dhost,
2293 ETHER_ADDR_LEN) == 0) {
2294 if (bif->bif_ifp != ifp) {
2295 /* XXX loop prevention */
2296 m->m_flags |= M_PROTO1;
2297 new_ifp = bif->bif_ifp;
2299 if (bif->bif_flags & IFBIF_LEARNING) {
2300 bridge_rtupdate(sc, eh->ether_shost,
2301 ifp, IFBAF_DYNAMIC);
2306 /* We just received a packet that we sent out. */
2307 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
2308 ETHER_ADDR_LEN) == 0) {
2315 /* Perform the bridge forwarding function. */
2316 bridge_forward(sc, m);
2319 if (new_ifp != NULL) {
2320 ether_reinput_oncpu(new_ifp, m, 1);
2327 * bridge_start_bcast:
2329 * Broadcast the packet sent from bridge to all member
2331 * This is a simplified version of bridge_broadcast(), however,
2332 * this function expects caller to hold bridge's serializer.
2335 bridge_start_bcast(struct bridge_softc *sc, struct mbuf *m)
2337 struct bridge_iflist *bif;
2339 struct ifnet *dst_if, *bifp;
2343 ASSERT_SERIALIZED(bifp->if_serializer);
2346 * Following loop is MPSAFE; nothing is blocking
2349 LIST_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
2350 dst_if = bif->bif_ifp;
2352 if (bif->bif_flags & IFBIF_STP) {
2353 switch (bif->bif_state) {
2354 case BSTP_IFSTATE_BLOCKING:
2355 case BSTP_IFSTATE_DISABLED:
2360 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2361 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2364 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2367 if (LIST_NEXT(bif, bif_next) == NULL) {
2371 mc = m_copypacket(m, MB_DONTWAIT);
2377 bridge_enqueue(dst_if, mc);
2386 * Send a frame to all interfaces that are members of
2387 * the bridge, except for the one on which the packet
2391 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
2394 struct bridge_iflist *bif, *nbif;
2396 struct ifnet *dst_if, *bifp;
2400 ASSERT_NOT_SERIALIZED(bifp->if_serializer);
2402 if (inet_pfil_hook.ph_hashooks > 0
2404 || inet6_pfil_hook.ph_hashooks > 0
2407 if (bridge_pfil(&m, bifp, src_if, PFIL_IN) != 0)
2412 /* Filter on the bridge interface before broadcasting */
2413 if (bridge_pfil(&m, bifp, NULL, PFIL_OUT) != 0)
2419 LIST_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
2420 dst_if = bif->bif_ifp;
2421 if (dst_if == src_if)
2424 if (bif->bif_flags & IFBIF_STP) {
2425 switch (bif->bif_state) {
2426 case BSTP_IFSTATE_BLOCKING:
2427 case BSTP_IFSTATE_DISABLED:
2432 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2433 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2436 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2439 if (LIST_NEXT(bif, bif_next) == NULL) {
2443 mc = m_copypacket(m, MB_DONTWAIT);
2445 sc->sc_ifp->if_oerrors++;
2451 * Filter on the output interface. Pass a NULL bridge
2452 * interface pointer so we do not redundantly filter on
2453 * the bridge for each interface we broadcast on.
2455 if (inet_pfil_hook.ph_hashooks > 0
2457 || inet6_pfil_hook.ph_hashooks > 0
2460 if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
2465 bridge_handoff(dst_if, mc);
2467 if (nbif != NULL && !nbif->bif_onlist) {
2468 KKASSERT(bif->bif_onlist);
2469 nbif = LIST_NEXT(bif, bif_next);
2479 * Duplicate a packet out one or more interfaces that are in span mode,
2480 * the original mbuf is unmodified.
2483 bridge_span(struct bridge_softc *sc, struct mbuf *m)
2485 struct bridge_iflist *bif;
2486 struct ifnet *dst_if, *bifp;
2490 lwkt_serialize_enter(bifp->if_serializer);
2492 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2493 dst_if = bif->bif_ifp;
2495 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2498 mc = m_copypacket(m, MB_DONTWAIT);
2500 sc->sc_ifp->if_oerrors++;
2503 bridge_enqueue(dst_if, mc);
2506 lwkt_serialize_exit(bifp->if_serializer);
2510 bridge_rtmsg_sync_handler(struct netmsg *nmsg)
2512 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
2516 bridge_rtmsg_sync(struct bridge_softc *sc)
2520 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2522 netmsg_init(&nmsg, &curthread->td_msgport, 0,
2523 bridge_rtmsg_sync_handler);
2524 ifnet_domsg(&nmsg.nm_lmsg, 0);
2527 static __inline void
2528 bridge_rtinfo_update(struct bridge_rtinfo *bri, struct ifnet *dst_if,
2529 int setflags, uint8_t flags, uint32_t timeo)
2531 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2532 bri->bri_ifp != dst_if)
2533 bri->bri_ifp = dst_if;
2534 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2535 bri->bri_expire != time_second + timeo)
2536 bri->bri_expire = time_second + timeo;
2538 bri->bri_flags = flags;
2542 bridge_rtinstall_oncpu(struct bridge_softc *sc, const uint8_t *dst,
2543 struct ifnet *dst_if, int setflags, uint8_t flags,
2544 struct bridge_rtinfo **bri0)
2546 struct bridge_rtnode *brt;
2547 struct bridge_rtinfo *bri;
2550 brt = bridge_rtnode_lookup(sc, dst);
2553 * rtnode for 'dst' already exists. We inform the
2554 * caller about this by leaving bri0 as NULL. The
2555 * caller will terminate the intallation upon getting
2556 * NULL bri0. However, we still need to update the
2559 KKASSERT(*bri0 == NULL);
2562 bridge_rtinfo_update(brt->brt_info, dst_if, setflags,
2563 flags, sc->sc_brttimeout);
2568 * We only need to check brtcnt on CPU0, since if limit
2569 * is to be exceeded, ENOSPC is returned. Caller knows
2570 * this and will terminate the installation.
2572 if (sc->sc_brtcnt >= sc->sc_brtmax)
2575 KKASSERT(*bri0 == NULL);
2576 bri = kmalloc(sizeof(struct bridge_rtinfo), M_DEVBUF,
2581 bri->bri_flags = IFBAF_DYNAMIC;
2582 bridge_rtinfo_update(bri, dst_if, setflags, flags,
2586 KKASSERT(bri != NULL);
2589 brt = kmalloc(sizeof(struct bridge_rtnode), M_DEVBUF,
2591 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2592 brt->brt_info = bri;
2594 bridge_rtnode_insert(sc, brt);
2599 bridge_rtinstall_handler(struct netmsg *nmsg)
2601 struct netmsg_brsaddr *brmsg = (struct netmsg_brsaddr *)nmsg;
2604 error = bridge_rtinstall_oncpu(brmsg->br_softc,
2605 brmsg->br_dst, brmsg->br_dst_if,
2606 brmsg->br_setflags, brmsg->br_flags,
2609 KKASSERT(mycpuid == 0 && brmsg->br_rtinfo == NULL);
2610 lwkt_replymsg(&nmsg->nm_lmsg, error);
2612 } else if (brmsg->br_rtinfo == NULL) {
2613 /* rtnode already exists for 'dst' */
2614 KKASSERT(mycpuid == 0);
2615 lwkt_replymsg(&nmsg->nm_lmsg, 0);
2618 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
2624 * Add/Update a bridge routing entry.
2627 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
2628 struct ifnet *dst_if, uint8_t flags)
2630 struct bridge_rtnode *brt;
2633 * A route for this destination might already exist. If so,
2634 * update it, otherwise create a new one.
2636 if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
2637 struct netmsg_brsaddr *brmsg;
2639 if (sc->sc_brtcnt >= sc->sc_brtmax)
2642 brmsg = kmalloc(sizeof(*brmsg), M_LWKTMSG, M_WAITOK | M_NULLOK);
2646 netmsg_init(&brmsg->br_nmsg, &netisr_afree_rport, 0,
2647 bridge_rtinstall_handler);
2648 memcpy(brmsg->br_dst, dst, ETHER_ADDR_LEN);
2649 brmsg->br_dst_if = dst_if;
2650 brmsg->br_flags = flags;
2651 brmsg->br_setflags = 0;
2652 brmsg->br_softc = sc;
2653 brmsg->br_rtinfo = NULL;
2655 ifnet_sendmsg(&brmsg->br_nmsg.nm_lmsg, 0);
2658 bridge_rtinfo_update(brt->brt_info, dst_if, 0, flags,
2664 bridge_rtsaddr(struct bridge_softc *sc, const uint8_t *dst,
2665 struct ifnet *dst_if, uint8_t flags)
2667 struct netmsg_brsaddr brmsg;
2669 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2671 netmsg_init(&brmsg.br_nmsg, &curthread->td_msgport, 0,
2672 bridge_rtinstall_handler);
2673 memcpy(brmsg.br_dst, dst, ETHER_ADDR_LEN);
2674 brmsg.br_dst_if = dst_if;
2675 brmsg.br_flags = flags;
2676 brmsg.br_setflags = 1;
2677 brmsg.br_softc = sc;
2678 brmsg.br_rtinfo = NULL;
2680 return ifnet_domsg(&brmsg.br_nmsg.nm_lmsg, 0);
2686 * Lookup the destination interface for an address.
2688 static struct ifnet *
2689 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
2691 struct bridge_rtnode *brt;
2693 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2695 return brt->brt_info->bri_ifp;
2699 bridge_rtreap_handler(struct netmsg *nmsg)
2701 struct bridge_softc *sc = nmsg->nm_lmsg.u.ms_resultp;
2702 struct bridge_rtnode *brt, *nbrt;
2704 LIST_FOREACH_MUTABLE(brt, &sc->sc_rtlists[mycpuid], brt_list, nbrt) {
2705 if (brt->brt_info->bri_dead)
2706 bridge_rtnode_destroy(sc, brt);
2708 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
2712 bridge_rtreap(struct bridge_softc *sc)
2716 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2718 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_rtreap_handler);
2719 nmsg.nm_lmsg.u.ms_resultp = sc;
2721 ifnet_domsg(&nmsg.nm_lmsg, 0);
2725 bridge_rtreap_async(struct bridge_softc *sc)
2727 struct netmsg *nmsg;
2729 nmsg = kmalloc(sizeof(*nmsg), M_LWKTMSG, M_WAITOK);
2731 netmsg_init(nmsg, &netisr_afree_rport, 0, bridge_rtreap_handler);
2732 nmsg->nm_lmsg.u.ms_resultp = sc;
2734 ifnet_sendmsg(&nmsg->nm_lmsg, 0);
2740 * Trim the routine table so that we have a number
2741 * of routing entries less than or equal to the
2745 bridge_rttrim(struct bridge_softc *sc)
2747 struct bridge_rtnode *brt;
2750 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2752 /* Make sure we actually need to do this. */
2753 if (sc->sc_brtcnt <= sc->sc_brtmax)
2757 * Find out how many rtnodes are dead
2759 dead = bridge_rtage_finddead(sc);
2760 KKASSERT(dead <= sc->sc_brtcnt);
2762 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
2763 /* Enough dead rtnodes are found */
2769 * Kill some dynamic rtnodes to meet the brtmax
2771 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
2772 struct bridge_rtinfo *bri = brt->brt_info;
2774 if (bri->bri_dead) {
2776 * We have counted this rtnode in
2777 * bridge_rtage_finddead()
2782 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2785 KKASSERT(dead <= sc->sc_brtcnt);
2787 if (sc->sc_brtcnt - dead <= sc->sc_brtmax) {
2788 /* Enough rtnodes are collected */
2800 * Aging timer for the bridge.
2803 bridge_timer(void *arg)
2805 struct bridge_softc *sc = arg;
2806 struct lwkt_msg *lmsg;
2808 KKASSERT(mycpuid == BRIDGE_CFGCPU);
2812 if (callout_pending(&sc->sc_brcallout) ||
2813 !callout_active(&sc->sc_brcallout)) {
2817 callout_deactivate(&sc->sc_brcallout);
2819 lmsg = &sc->sc_brtimemsg.nm_lmsg;
2820 KKASSERT(lmsg->ms_flags & MSGF_DONE);
2821 lwkt_sendmsg(BRIDGE_CFGPORT, lmsg);
2827 bridge_timer_handler(struct netmsg *nmsg)
2829 struct bridge_softc *sc = nmsg->nm_lmsg.u.ms_resultp;
2831 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
2835 lwkt_replymsg(&nmsg->nm_lmsg, 0);
2839 if (sc->sc_ifp->if_flags & IFF_RUNNING) {
2840 callout_reset(&sc->sc_brcallout,
2841 bridge_rtable_prune_period * hz, bridge_timer, sc);
2846 bridge_rtage_finddead(struct bridge_softc *sc)
2848 struct bridge_rtnode *brt;
2851 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
2852 struct bridge_rtinfo *bri = brt->brt_info;
2854 if ((bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2855 time_second >= bri->bri_expire) {
2858 KKASSERT(dead <= sc->sc_brtcnt);
2867 * Perform an aging cycle.
2870 bridge_rtage(struct bridge_softc *sc)
2872 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2874 if (bridge_rtage_finddead(sc))
2881 * Remove all dynamic addresses from the bridge.
2884 bridge_rtflush(struct bridge_softc *sc, int bf)
2886 struct bridge_rtnode *brt;
2890 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
2891 struct bridge_rtinfo *bri = brt->brt_info;
2893 if ((bf & IFBF_FLUSHALL) ||
2894 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2900 if (bf & IFBF_FLUSHSYNC)
2903 bridge_rtreap_async(sc);
2910 * Remove an address from the table.
2913 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
2915 struct bridge_rtnode *brt;
2917 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
2919 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2922 /* TODO: add a cheaper delete operation */
2923 brt->brt_info->bri_dead = 1;
2931 * Delete routes to a speicifc member interface.
2934 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int bf)
2936 struct bridge_rtnode *brt;
2940 LIST_FOREACH(brt, &sc->sc_rtlists[mycpuid], brt_list) {
2941 struct bridge_rtinfo *bri = brt->brt_info;
2943 if (bri->bri_ifp == ifp &&
2944 ((bf & IFBF_FLUSHALL) ||
2945 (bri->bri_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)) {
2951 if (bf & IFBF_FLUSHSYNC)
2954 bridge_rtreap_async(sc);
2959 * bridge_rtable_init:
2961 * Initialize the route table for this bridge.
2964 bridge_rtable_init(struct bridge_softc *sc)
2969 * Initialize per-cpu hash tables
2971 sc->sc_rthashs = kmalloc(sizeof(*sc->sc_rthashs) * ncpus,
2972 M_DEVBUF, M_WAITOK);
2973 for (cpu = 0; cpu < ncpus; ++cpu) {
2976 sc->sc_rthashs[cpu] =
2977 kmalloc(sizeof(struct bridge_rtnode_head) * BRIDGE_RTHASH_SIZE,
2978 M_DEVBUF, M_WAITOK);
2980 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
2981 LIST_INIT(&sc->sc_rthashs[cpu][i]);
2983 sc->sc_rthash_key = karc4random();
2986 * Initialize per-cpu lists
2988 sc->sc_rtlists = kmalloc(sizeof(struct bridge_rtnode_head) * ncpus,
2989 M_DEVBUF, M_WAITOK);
2990 for (cpu = 0; cpu < ncpus; ++cpu)
2991 LIST_INIT(&sc->sc_rtlists[cpu]);
2995 * bridge_rtable_fini:
2997 * Deconstruct the route table for this bridge.
3000 bridge_rtable_fini(struct bridge_softc *sc)
3005 * Free per-cpu hash tables
3007 for (cpu = 0; cpu < ncpus; ++cpu)
3008 kfree(sc->sc_rthashs[cpu], M_DEVBUF);
3009 kfree(sc->sc_rthashs, M_DEVBUF);
3012 * Free per-cpu lists
3014 kfree(sc->sc_rtlists, M_DEVBUF);
3018 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
3019 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
3021 #define mix(a, b, c) \
3023 a -= b; a -= c; a ^= (c >> 13); \
3024 b -= c; b -= a; b ^= (a << 8); \
3025 c -= a; c -= b; c ^= (b >> 13); \
3026 a -= b; a -= c; a ^= (c >> 12); \
3027 b -= c; b -= a; b ^= (a << 16); \
3028 c -= a; c -= b; c ^= (b >> 5); \
3029 a -= b; a -= c; a ^= (c >> 3); \
3030 b -= c; b -= a; b ^= (a << 10); \
3031 c -= a; c -= b; c ^= (b >> 15); \
3032 } while (/*CONSTCOND*/0)
3034 static __inline uint32_t
3035 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
3037 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
3048 return (c & BRIDGE_RTHASH_MASK);
3054 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
3058 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
3059 d = ((int)a[i]) - ((int)b[i]);
3066 * bridge_rtnode_lookup:
3068 * Look up a bridge route node for the specified destination.
3070 static struct bridge_rtnode *
3071 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
3073 struct bridge_rtnode *brt;
3077 hash = bridge_rthash(sc, addr);
3078 LIST_FOREACH(brt, &sc->sc_rthashs[mycpuid][hash], brt_hash) {
3079 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
3090 * bridge_rtnode_insert:
3092 * Insert the specified bridge node into the route table.
3093 * Caller has to make sure that rtnode does not exist.
3096 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
3098 struct bridge_rtnode *lbrt;
3102 hash = bridge_rthash(sc, brt->brt_addr);
3104 lbrt = LIST_FIRST(&sc->sc_rthashs[mycpuid][hash]);
3106 LIST_INSERT_HEAD(&sc->sc_rthashs[mycpuid][hash], brt, brt_hash);
3111 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
3112 KASSERT(dir != 0, ("rtnode already exist\n"));
3115 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
3118 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
3119 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
3122 lbrt = LIST_NEXT(lbrt, brt_hash);
3123 } while (lbrt != NULL);
3125 panic("no suitable position found for rtnode\n");
3127 LIST_INSERT_HEAD(&sc->sc_rtlists[mycpuid], brt, brt_list);
3130 * Update the brtcnt.
3131 * We only need to do it once and we do it on CPU0.
3138 * bridge_rtnode_destroy:
3140 * Destroy a bridge rtnode.
3143 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
3145 LIST_REMOVE(brt, brt_hash);
3146 LIST_REMOVE(brt, brt_list);
3148 if (mycpuid + 1 == ncpus) {
3149 /* Free rtinfo associated with rtnode on the last cpu */
3150 kfree(brt->brt_info, M_DEVBUF);
3152 kfree(brt, M_DEVBUF);
3155 /* Update brtcnt only on CPU0 */
3161 bridge_post_pfil(struct mbuf *m)
3163 if (m->m_pkthdr.fw_flags & IPFORWARD_MBUF_TAGGED)
3167 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED)
3174 * Send bridge packets through pfil if they are one of the types pfil can deal
3175 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
3176 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
3180 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
3182 int snap, error, i, hlen;
3183 struct ether_header *eh1, eh2;
3186 u_int16_t ether_type;
3189 error = -1; /* Default error if not error == 0 */
3191 if (pfil_bridge == 0 && pfil_member == 0)
3192 return (0); /* filtering is disabled */
3194 i = min((*mp)->m_pkthdr.len, max_protohdr);
3195 if ((*mp)->m_len < i) {
3196 *mp = m_pullup(*mp, i);
3198 kprintf("%s: m_pullup failed\n", __func__);
3203 eh1 = mtod(*mp, struct ether_header *);
3204 ether_type = ntohs(eh1->ether_type);
3207 * Check for SNAP/LLC.
3209 if (ether_type < ETHERMTU) {
3210 struct llc *llc2 = (struct llc *)(eh1 + 1);
3212 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
3213 llc2->llc_dsap == LLC_SNAP_LSAP &&
3214 llc2->llc_ssap == LLC_SNAP_LSAP &&
3215 llc2->llc_control == LLC_UI) {
3216 ether_type = htons(llc2->llc_un.type_snap.ether_type);
3222 * If we're trying to filter bridge traffic, don't look at anything
3223 * other than IP and ARP traffic. If the filter doesn't understand
3224 * IPv6, don't allow IPv6 through the bridge either. This is lame
3225 * since if we really wanted, say, an AppleTalk filter, we are hosed,
3226 * but of course we don't have an AppleTalk filter to begin with.
3227 * (Note that since pfil doesn't understand ARP it will pass *ALL*
3230 switch (ether_type) {
3232 case ETHERTYPE_REVARP:
3233 return (0); /* Automatically pass */
3237 case ETHERTYPE_IPV6:
3243 * Check to see if the user wants to pass non-ip
3244 * packets, these will not be checked by pfil(9)
3245 * and passed unconditionally so the default is to drop.
3251 /* Strip off the Ethernet header and keep a copy. */
3252 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
3253 m_adj(*mp, ETHER_HDR_LEN);
3255 /* Strip off snap header, if present */
3257 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
3258 m_adj(*mp, sizeof(struct llc));
3262 * Check the IP header for alignment and errors
3264 if (dir == PFIL_IN) {
3265 switch (ether_type) {
3267 error = bridge_ip_checkbasic(mp);
3270 case ETHERTYPE_IPV6:
3271 error = bridge_ip6_checkbasic(mp);
3284 * Run the packet through pfil
3286 switch (ether_type) {
3289 * before calling the firewall, swap fields the same as
3290 * IP does. here we assume the header is contiguous
3292 ip = mtod(*mp, struct ip *);
3294 ip->ip_len = ntohs(ip->ip_len);
3295 ip->ip_off = ntohs(ip->ip_off);
3298 * Run pfil on the member interface and the bridge, both can
3299 * be skipped by clearing pfil_member or pfil_bridge.
3302 * in_if -> bridge_if -> out_if
3304 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL) {
3305 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
3306 if (*mp == NULL || error != 0) /* filter may consume */
3308 error = bridge_post_pfil(*mp);
3313 if (pfil_member && ifp != NULL) {
3314 error = pfil_run_hooks(&inet_pfil_hook, mp, ifp, dir);
3315 if (*mp == NULL || error != 0) /* filter may consume */
3317 error = bridge_post_pfil(*mp);
3322 if (pfil_bridge && dir == PFIL_IN && bifp != NULL) {
3323 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
3324 if (*mp == NULL || error != 0) /* filter may consume */
3326 error = bridge_post_pfil(*mp);
3331 /* check if we need to fragment the packet */
3332 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
3333 i = (*mp)->m_pkthdr.len;
3334 if (i > ifp->if_mtu) {
3335 error = bridge_fragment(ifp, *mp, &eh2, snap,
3341 /* Recalculate the ip checksum and restore byte ordering */
3342 ip = mtod(*mp, struct ip *);
3343 hlen = ip->ip_hl << 2;
3344 if (hlen < sizeof(struct ip))
3346 if (hlen > (*mp)->m_len) {
3347 if ((*mp = m_pullup(*mp, hlen)) == 0)
3349 ip = mtod(*mp, struct ip *);
3353 ip->ip_len = htons(ip->ip_len);
3354 ip->ip_off = htons(ip->ip_off);
3356 if (hlen == sizeof(struct ip))
3357 ip->ip_sum = in_cksum_hdr(ip);
3359 ip->ip_sum = in_cksum(*mp, hlen);
3363 case ETHERTYPE_IPV6:
3364 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3365 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
3368 if (*mp == NULL || error != 0) /* filter may consume */
3371 if (pfil_member && ifp != NULL)
3372 error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
3375 if (*mp == NULL || error != 0) /* filter may consume */
3378 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
3379 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
3396 * Finally, put everything back the way it was and return
3399 M_PREPEND(*mp, sizeof(struct llc), MB_DONTWAIT);
3402 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
3405 M_PREPEND(*mp, ETHER_HDR_LEN, MB_DONTWAIT);
3408 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
3419 * Perform basic checks on header size since
3420 * pfil assumes ip_input has already processed
3421 * it for it. Cut-and-pasted from ip_input.c.
3422 * Given how simple the IPv6 version is,
3423 * does the IPv4 version really need to be
3426 * XXX Should we update ipstat here, or not?
3427 * XXX Right now we update ipstat but not
3431 bridge_ip_checkbasic(struct mbuf **mp)
3433 struct mbuf *m = *mp;
3441 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3442 if ((m = m_copyup(m, sizeof(struct ip),
3443 (max_linkhdr + 3) & ~3)) == NULL) {
3444 /* XXXJRT new stat, please */
3445 ipstat.ips_toosmall++;
3450 #ifndef __predict_false
3451 #define __predict_false(x) x
3453 if (__predict_false(m->m_len < sizeof (struct ip))) {
3454 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
3455 ipstat.ips_toosmall++;
3459 ip = mtod(m, struct ip *);
3460 if (ip == NULL) goto bad;
3462 if (ip->ip_v != IPVERSION) {
3463 ipstat.ips_badvers++;
3466 hlen = ip->ip_hl << 2;
3467 if (hlen < sizeof(struct ip)) { /* minimum header length */
3468 ipstat.ips_badhlen++;
3471 if (hlen > m->m_len) {
3472 if ((m = m_pullup(m, hlen)) == 0) {
3473 ipstat.ips_badhlen++;
3476 ip = mtod(m, struct ip *);
3477 if (ip == NULL) goto bad;
3480 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
3481 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
3483 if (hlen == sizeof(struct ip)) {
3484 sum = in_cksum_hdr(ip);
3486 sum = in_cksum(m, hlen);
3490 ipstat.ips_badsum++;
3494 /* Retrieve the packet length. */
3495 len = ntohs(ip->ip_len);
3498 * Check for additional length bogosity
3501 ipstat.ips_badlen++;
3506 * Check that the amount of data in the buffers
3507 * is as at least much as the IP header would have us expect.
3508 * Drop packet if shorter than we expect.
3510 if (m->m_pkthdr.len < len) {
3511 ipstat.ips_tooshort++;
3515 /* Checks out, proceed */
3526 * Same as above, but for IPv6.
3527 * Cut-and-pasted from ip6_input.c.
3528 * XXX Should we update ip6stat, or not?
3531 bridge_ip6_checkbasic(struct mbuf **mp)
3533 struct mbuf *m = *mp;
3534 struct ip6_hdr *ip6;
3537 * If the IPv6 header is not aligned, slurp it up into a new
3538 * mbuf with space for link headers, in the event we forward
3539 * it. Otherwise, if it is aligned, make sure the entire base
3540 * IPv6 header is in the first mbuf of the chain.
3543 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3544 struct ifnet *inifp = m->m_pkthdr.rcvif;
3545 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
3546 (max_linkhdr + 3) & ~3)) == NULL) {
3547 /* XXXJRT new stat, please */
3548 ip6stat.ip6s_toosmall++;
3549 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3554 if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
3555 struct ifnet *inifp = m->m_pkthdr.rcvif;
3556 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
3557 ip6stat.ip6s_toosmall++;
3558 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3563 ip6 = mtod(m, struct ip6_hdr *);
3565 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
3566 ip6stat.ip6s_badvers++;
3567 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
3571 /* Checks out, proceed */
3584 * Return a fragmented mbuf chain.
3587 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
3588 int snap, struct llc *llc)
3594 if (m->m_len < sizeof(struct ip) &&
3595 (m = m_pullup(m, sizeof(struct ip))) == NULL)
3597 ip = mtod(m, struct ip *);
3599 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
3604 /* walk the chain and re-add the Ethernet header */
3605 for (m0 = m; m0; m0 = m0->m_nextpkt) {
3608 M_PREPEND(m0, sizeof(struct llc), MB_DONTWAIT);
3613 bcopy(llc, mtod(m0, caddr_t),
3614 sizeof(struct llc));
3616 M_PREPEND(m0, ETHER_HDR_LEN, MB_DONTWAIT);
3621 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
3627 ipstat.ips_fragmented++;
3638 bridge_enqueue_handler(struct netmsg *nmsg)
3640 struct netmsg_packet *nmp;
3641 struct ifnet *dst_ifp;
3644 nmp = (struct netmsg_packet *)nmsg;
3646 dst_ifp = nmp->nm_netmsg.nm_lmsg.u.ms_resultp;
3648 bridge_handoff(dst_ifp, m);
3652 bridge_handoff(struct ifnet *dst_ifp, struct mbuf *m)
3656 /* We may be sending a fragment so traverse the mbuf */
3658 struct altq_pktattr pktattr;
3661 m->m_nextpkt = NULL;
3663 if (ifq_is_enabled(&dst_ifp->if_snd))
3664 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
3666 ifq_dispatch(dst_ifp, m, &pktattr);
3671 bridge_control_dispatch(struct netmsg *nmsg)
3673 struct netmsg_brctl *bc_msg = (struct netmsg_brctl *)nmsg;
3674 struct ifnet *bifp = bc_msg->bc_sc->sc_ifp;
3677 lwkt_serialize_enter(bifp->if_serializer);
3678 error = bc_msg->bc_func(bc_msg->bc_sc, bc_msg->bc_arg);
3679 lwkt_serialize_exit(bifp->if_serializer);
3681 lwkt_replymsg(&nmsg->nm_lmsg, error);
3685 bridge_control(struct bridge_softc *sc, u_long cmd,
3686 bridge_ctl_t bc_func, void *bc_arg)
3688 struct ifnet *bifp = sc->sc_ifp;
3689 struct netmsg_brctl bc_msg;
3690 struct netmsg *nmsg;
3693 ASSERT_SERIALIZED(bifp->if_serializer);
3695 bzero(&bc_msg, sizeof(bc_msg));
3696 nmsg = &bc_msg.bc_nmsg;
3698 netmsg_init(nmsg, &curthread->td_msgport, 0, bridge_control_dispatch);
3699 bc_msg.bc_func = bc_func;
3701 bc_msg.bc_arg = bc_arg;
3703 lwkt_serialize_exit(bifp->if_serializer);
3704 error = lwkt_domsg(BRIDGE_CFGPORT, &nmsg->nm_lmsg, 0);
3705 lwkt_serialize_enter(bifp->if_serializer);
3710 bridge_add_bif_handler(struct netmsg *nmsg)
3712 struct netmsg_braddbif *amsg = (struct netmsg_braddbif *)nmsg;
3713 struct bridge_softc *sc;
3714 struct bridge_iflist *bif;
3716 sc = amsg->br_softc;
3718 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK | M_ZERO);
3719 bif->bif_ifp = amsg->br_bif_ifp;
3720 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
3721 bif->bif_onlist = 1;
3722 bif->bif_info = amsg->br_bif_info;
3724 LIST_INSERT_HEAD(&sc->sc_iflists[mycpuid], bif, bif_next);
3726 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
3730 bridge_add_bif(struct bridge_softc *sc, struct bridge_ifinfo *bif_info,
3733 struct netmsg_braddbif amsg;
3735 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
3737 netmsg_init(&amsg.br_nmsg, &curthread->td_msgport, 0,
3738 bridge_add_bif_handler);
3740 amsg.br_bif_info = bif_info;
3741 amsg.br_bif_ifp = ifp;
3743 ifnet_domsg(&amsg.br_nmsg.nm_lmsg, 0);
3747 bridge_del_bif_handler(struct netmsg *nmsg)
3749 struct netmsg_brdelbif *dmsg = (struct netmsg_brdelbif *)nmsg;
3750 struct bridge_softc *sc;
3751 struct bridge_iflist *bif;
3753 sc = dmsg->br_softc;
3756 * Locate the bif associated with the br_bif_info
3757 * on the current CPU
3759 bif = bridge_lookup_member_ifinfo(sc, dmsg->br_bif_info);
3760 KKASSERT(bif != NULL && bif->bif_onlist);
3762 /* Remove the bif from the current CPU's iflist */
3763 bif->bif_onlist = 0;
3764 LIST_REMOVE(bif, bif_next);
3766 /* Save the removed bif for later freeing */
3767 LIST_INSERT_HEAD(dmsg->br_bif_list, bif, bif_next);
3769 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
3773 bridge_del_bif(struct bridge_softc *sc, struct bridge_ifinfo *bif_info,
3774 struct bridge_iflist_head *saved_bifs)
3776 struct netmsg_brdelbif dmsg;
3778 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
3780 netmsg_init(&dmsg.br_nmsg, &curthread->td_msgport, 0,
3781 bridge_del_bif_handler);
3783 dmsg.br_bif_info = bif_info;
3784 dmsg.br_bif_list = saved_bifs;
3786 ifnet_domsg(&dmsg.br_nmsg.nm_lmsg, 0);
3790 bridge_set_bifflags_handler(struct netmsg *nmsg)
3792 struct netmsg_brsflags *smsg = (struct netmsg_brsflags *)nmsg;
3793 struct bridge_softc *sc;
3794 struct bridge_iflist *bif;
3796 sc = smsg->br_softc;
3799 * Locate the bif associated with the br_bif_info
3800 * on the current CPU
3802 bif = bridge_lookup_member_ifinfo(sc, smsg->br_bif_info);
3803 KKASSERT(bif != NULL && bif->bif_onlist);
3805 bif->bif_flags = smsg->br_bif_flags;
3807 ifnet_forwardmsg(&nmsg->nm_lmsg, mycpuid + 1);
3811 bridge_set_bifflags(struct bridge_softc *sc, struct bridge_ifinfo *bif_info,
3814 struct netmsg_brsflags smsg;
3816 ASSERT_NOT_SERIALIZED(sc->sc_ifp->if_serializer);
3818 netmsg_init(&smsg.br_nmsg, &curthread->td_msgport, 0,
3819 bridge_set_bifflags_handler);
3821 smsg.br_bif_info = bif_info;
3822 smsg.br_bif_flags = bif_flags;
3824 ifnet_domsg(&smsg.br_nmsg.nm_lmsg, 0);