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 1.44 2008/09/18 11:55:20 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 #include <sys/cdefs.h>
86 #include "opt_inet6.h"
88 #include <sys/param.h>
90 #include <sys/malloc.h>
91 #include <sys/protosw.h>
92 #include <sys/systm.h>
94 #include <sys/socket.h> /* for net/if.h */
95 #include <sys/sockio.h>
96 #include <sys/ctype.h> /* string functions */
97 #include <sys/kernel.h>
98 #include <sys/random.h>
99 #include <sys/sysctl.h>
100 #include <sys/module.h>
101 #include <sys/proc.h>
102 #include <sys/lock.h>
103 #include <sys/thread.h>
104 #include <sys/thread2.h>
105 #include <sys/mpipe.h>
109 #include <net/if_dl.h>
110 #include <net/if_types.h>
111 #include <net/if_var.h>
112 #include <net/pfil.h>
113 #include <net/ifq_var.h>
114 #include <net/if_clone.h>
116 #include <netinet/in.h> /* for struct arpcom */
117 #include <netinet/in_systm.h>
118 #include <netinet/in_var.h>
119 #include <netinet/ip.h>
120 #include <netinet/ip_var.h>
122 #include <netinet/ip6.h>
123 #include <netinet6/ip6_var.h>
125 #include <netinet/if_ether.h> /* for struct arpcom */
126 #include <net/bridge/if_bridgevar.h>
127 #include <net/if_llc.h>
128 #include <net/netmsg2.h>
130 #include <net/route.h>
131 #include <sys/in_cksum.h>
134 * Size of the route hash table. Must be a power of two.
136 #ifndef BRIDGE_RTHASH_SIZE
137 #define BRIDGE_RTHASH_SIZE 1024
140 #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
143 * Maximum number of addresses to cache.
145 #ifndef BRIDGE_RTABLE_MAX
146 #define BRIDGE_RTABLE_MAX 100
150 * Spanning tree defaults.
152 #define BSTP_DEFAULT_MAX_AGE (20 * 256)
153 #define BSTP_DEFAULT_HELLO_TIME (2 * 256)
154 #define BSTP_DEFAULT_FORWARD_DELAY (15 * 256)
155 #define BSTP_DEFAULT_HOLD_TIME (1 * 256)
156 #define BSTP_DEFAULT_BRIDGE_PRIORITY 0x8000
157 #define BSTP_DEFAULT_PORT_PRIORITY 0x80
158 #define BSTP_DEFAULT_PATH_COST 55
161 * Timeout (in seconds) for entries learned dynamically.
163 #ifndef BRIDGE_RTABLE_TIMEOUT
164 #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
168 * Number of seconds between walks of the route list.
170 #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
171 #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
175 * List of capabilities to mask on the member interface.
177 #define BRIDGE_IFCAPS_MASK IFCAP_TXCSUM
179 eventhandler_tag bridge_detach_cookie = NULL;
181 extern struct mbuf *(*bridge_input_p)(struct ifnet *, struct mbuf *);
182 extern int (*bridge_output_p)(struct ifnet *, struct mbuf *);
183 extern void (*bridge_dn_p)(struct mbuf *, struct ifnet *);
185 typedef int (*bridge_ctl_t)(struct bridge_softc *, void *);
187 static int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
189 static int bridge_clone_create(struct if_clone *, int);
190 static void bridge_clone_destroy(struct ifnet *);
192 static int bridge_ioctl(struct ifnet *, u_long, caddr_t, struct ucred *);
193 static void bridge_mutecaps(struct bridge_iflist *, int);
194 static void bridge_ifdetach(void *arg __unused, struct ifnet *);
195 static void bridge_init(void *);
196 static void bridge_stop(struct ifnet *);
197 static void bridge_start(struct ifnet *);
198 static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
199 static int bridge_output(struct ifnet *, struct mbuf *);
201 static void bridge_forward(struct bridge_softc *, struct mbuf *m);
203 static void bridge_timer(void *);
205 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
207 static void bridge_span(struct bridge_softc *, struct mbuf *);
209 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
210 struct ifnet *, int, uint8_t);
211 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
212 static void bridge_rttrim(struct bridge_softc *);
213 static void bridge_rtage(struct bridge_softc *);
214 static void bridge_rtflush(struct bridge_softc *, int);
215 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
217 static int bridge_rtable_init(struct bridge_softc *);
218 static void bridge_rtable_fini(struct bridge_softc *);
220 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
221 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
223 static int bridge_rtnode_insert(struct bridge_softc *,
224 struct bridge_rtnode *);
225 static void bridge_rtnode_destroy(struct bridge_softc *,
226 struct bridge_rtnode *);
228 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
230 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
232 static void bridge_delete_member(struct bridge_softc *,
233 struct bridge_iflist *, int);
234 static void bridge_delete_span(struct bridge_softc *,
235 struct bridge_iflist *);
237 static int bridge_control(struct bridge_softc *, u_long,
238 bridge_ctl_t, void *);
239 static int bridge_ioctl_add(struct bridge_softc *, void *);
240 static int bridge_ioctl_del(struct bridge_softc *, void *);
241 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
242 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
243 static int bridge_ioctl_scache(struct bridge_softc *, void *);
244 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
245 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
246 static int bridge_ioctl_rts(struct bridge_softc *, void *);
247 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
248 static int bridge_ioctl_sto(struct bridge_softc *, void *);
249 static int bridge_ioctl_gto(struct bridge_softc *, void *);
250 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
251 static int bridge_ioctl_flush(struct bridge_softc *, void *);
252 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
253 static int bridge_ioctl_spri(struct bridge_softc *, void *);
254 static int bridge_ioctl_ght(struct bridge_softc *, void *);
255 static int bridge_ioctl_sht(struct bridge_softc *, void *);
256 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
257 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
258 static int bridge_ioctl_gma(struct bridge_softc *, void *);
259 static int bridge_ioctl_sma(struct bridge_softc *, void *);
260 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
261 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
262 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
263 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
264 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
266 static int bridge_ip_checkbasic(struct mbuf **mp);
268 static int bridge_ip6_checkbasic(struct mbuf **mp);
270 static int bridge_fragment(struct ifnet *, struct mbuf *,
271 struct ether_header *, int, struct llc *);
272 static void bridge_enqueue_internal(struct ifnet *, struct mbuf *m,
274 static void bridge_enqueue_handler(struct netmsg *);
275 static void bridge_pfil_enqueue_handler(struct netmsg *);
276 static void bridge_pfil_enqueue(struct ifnet *, struct mbuf *, int);
277 static void bridge_handoff_notags(struct ifnet *, struct mbuf *);
278 static void bridge_handoff(struct ifnet *, struct mbuf *);
280 SYSCTL_DECL(_net_link);
281 SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
283 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
284 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
285 static int pfil_member = 1; /* run pfil hooks on the member interface */
286 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
287 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
288 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
289 &pfil_bridge, 0, "Packet filter on the bridge interface");
290 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
291 &pfil_member, 0, "Packet filter on the member interface");
293 struct bridge_control {
294 bridge_ctl_t bc_func;
299 #define BC_F_COPYIN 0x01 /* copy arguments in */
300 #define BC_F_COPYOUT 0x02 /* copy arguments out */
301 #define BC_F_SUSER 0x04 /* do super-user check */
303 const struct bridge_control bridge_control_table[] = {
304 { bridge_ioctl_add, sizeof(struct ifbreq),
305 BC_F_COPYIN|BC_F_SUSER },
306 { bridge_ioctl_del, sizeof(struct ifbreq),
307 BC_F_COPYIN|BC_F_SUSER },
309 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
310 BC_F_COPYIN|BC_F_COPYOUT },
311 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
312 BC_F_COPYIN|BC_F_SUSER },
314 { bridge_ioctl_scache, sizeof(struct ifbrparam),
315 BC_F_COPYIN|BC_F_SUSER },
316 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
319 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
320 BC_F_COPYIN|BC_F_COPYOUT },
321 { bridge_ioctl_rts, sizeof(struct ifbaconf),
322 BC_F_COPYIN|BC_F_COPYOUT },
324 { bridge_ioctl_saddr, sizeof(struct ifbareq),
325 BC_F_COPYIN|BC_F_SUSER },
327 { bridge_ioctl_sto, sizeof(struct ifbrparam),
328 BC_F_COPYIN|BC_F_SUSER },
329 { bridge_ioctl_gto, sizeof(struct ifbrparam),
332 { bridge_ioctl_daddr, sizeof(struct ifbareq),
333 BC_F_COPYIN|BC_F_SUSER },
335 { bridge_ioctl_flush, sizeof(struct ifbreq),
336 BC_F_COPYIN|BC_F_SUSER },
338 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
340 { bridge_ioctl_spri, sizeof(struct ifbrparam),
341 BC_F_COPYIN|BC_F_SUSER },
343 { bridge_ioctl_ght, sizeof(struct ifbrparam),
345 { bridge_ioctl_sht, sizeof(struct ifbrparam),
346 BC_F_COPYIN|BC_F_SUSER },
348 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
350 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
351 BC_F_COPYIN|BC_F_SUSER },
353 { bridge_ioctl_gma, sizeof(struct ifbrparam),
355 { bridge_ioctl_sma, sizeof(struct ifbrparam),
356 BC_F_COPYIN|BC_F_SUSER },
358 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
359 BC_F_COPYIN|BC_F_SUSER },
361 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
362 BC_F_COPYIN|BC_F_SUSER },
364 { bridge_ioctl_addspan, sizeof(struct ifbreq),
365 BC_F_COPYIN|BC_F_SUSER },
366 { bridge_ioctl_delspan, sizeof(struct ifbreq),
367 BC_F_COPYIN|BC_F_SUSER },
369 const int bridge_control_table_size =
370 sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
372 LIST_HEAD(, bridge_softc) bridge_list;
374 struct if_clone bridge_cloner = IF_CLONE_INITIALIZER("bridge",
376 bridge_clone_destroy, 0, IF_MAXUNIT);
379 bridge_modevent(module_t mod, int type, void *data)
383 LIST_INIT(&bridge_list);
384 if_clone_attach(&bridge_cloner);
385 bridge_input_p = bridge_input;
386 bridge_output_p = bridge_output;
387 bridge_detach_cookie = EVENTHANDLER_REGISTER(
388 ifnet_detach_event, bridge_ifdetach, NULL,
389 EVENTHANDLER_PRI_ANY);
391 bstp_linkstate_p = bstp_linkstate;
395 if (!LIST_EMPTY(&bridge_list))
397 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
398 bridge_detach_cookie);
399 if_clone_detach(&bridge_cloner);
400 bridge_input_p = NULL;
401 bridge_output_p = NULL;
403 bstp_linkstate_p = NULL;
412 static moduledata_t bridge_mod = {
418 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
422 * bridge_clone_create:
424 * Create a new bridge instance.
427 bridge_clone_create(struct if_clone *ifc, int unit)
429 struct bridge_softc *sc;
433 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
434 ifp = sc->sc_ifp = &sc->sc_if;
436 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
437 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
438 sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
439 sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
440 sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
441 sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
442 sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
444 /* Initialize our routing table. */
445 bridge_rtable_init(sc);
447 callout_init(&sc->sc_brcallout);
448 callout_init(&sc->sc_bstpcallout);
450 LIST_INIT(&sc->sc_iflist);
451 LIST_INIT(&sc->sc_spanlist);
454 if_initname(ifp, ifc->ifc_name, unit);
455 ifp->if_mtu = ETHERMTU;
456 ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
457 ifp->if_ioctl = bridge_ioctl;
458 ifp->if_start = bridge_start;
459 ifp->if_init = bridge_init;
460 ifp->if_type = IFT_BRIDGE;
461 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
462 ifp->if_snd.ifq_maxlen = ifqmaxlen;
463 ifq_set_ready(&ifp->if_snd);
464 ifp->if_hdrlen = ETHER_HDR_LEN;
467 * Generate a random ethernet address and use the private AC:DE:48
471 int rnd = karc4random();
472 bcopy(&rnd, &eaddr[0], 4); /* ETHER_ADDR_LEN == 6 */
474 bcopy(&rnd, &eaddr[2], 4); /* ETHER_ADDR_LEN == 6 */
476 eaddr[0] &= ~1; /* clear multicast bit */
477 eaddr[0] |= 2; /* set the LAA bit */
479 ether_ifattach(ifp, eaddr, NULL);
480 /* Now undo some of the damage... */
481 ifp->if_baudrate = 0;
482 ifp->if_type = IFT_BRIDGE;
484 crit_enter(); /* XXX MP */
485 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
492 bridge_delete_dispatch(struct netmsg *nmsg)
494 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
495 struct bridge_softc *sc = lmsg->u.ms_resultp;
496 struct ifnet *bifp = sc->sc_ifp;
497 struct bridge_iflist *bif;
499 lwkt_serialize_enter(bifp->if_serializer);
501 while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
502 bridge_delete_member(sc, bif, 0);
504 while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL)
505 bridge_delete_span(sc, bif);
507 lwkt_serialize_exit(bifp->if_serializer);
509 lwkt_replymsg(lmsg, 0);
513 * bridge_clone_destroy:
515 * Destroy a bridge instance.
518 bridge_clone_destroy(struct ifnet *ifp)
520 struct bridge_softc *sc = ifp->if_softc;
521 struct lwkt_msg *lmsg;
524 lwkt_serialize_enter(ifp->if_serializer);
527 ifp->if_flags &= ~IFF_UP;
529 callout_stop(&sc->sc_brcallout);
530 callout_stop(&sc->sc_bstpcallout);
532 lwkt_serialize_exit(ifp->if_serializer);
534 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_delete_dispatch);
535 lmsg = &nmsg.nm_lmsg;
536 lmsg->u.ms_resultp = sc;
537 lwkt_domsg(cpu_portfn(0), lmsg, 0);
539 crit_enter(); /* XXX MP */
540 LIST_REMOVE(sc, sc_list);
545 /* Tear down the routing table. */
546 bridge_rtable_fini(sc);
554 * Handle a control request from the operator.
557 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
559 struct bridge_softc *sc = ifp->if_softc;
561 struct ifbreq ifbreq;
562 struct ifbifconf ifbifconf;
563 struct ifbareq ifbareq;
564 struct ifbaconf ifbaconf;
565 struct ifbrparam ifbrparam;
567 struct ifdrv *ifd = (struct ifdrv *) data;
568 const struct bridge_control *bc;
571 ASSERT_SERIALIZED(ifp->if_serializer);
580 if (ifd->ifd_cmd >= bridge_control_table_size) {
584 bc = &bridge_control_table[ifd->ifd_cmd];
586 if (cmd == SIOCGDRVSPEC &&
587 (bc->bc_flags & BC_F_COPYOUT) == 0) {
590 } else if (cmd == SIOCSDRVSPEC &&
591 (bc->bc_flags & BC_F_COPYOUT) != 0) {
596 if (bc->bc_flags & BC_F_SUSER) {
597 error = suser_cred(cr, NULL_CRED_OKAY);
602 if (ifd->ifd_len != bc->bc_argsize ||
603 ifd->ifd_len > sizeof(args)) {
608 memset(&args, 0, sizeof(args));
609 if (bc->bc_flags & BC_F_COPYIN) {
610 error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
615 error = bridge_control(sc, cmd, bc->bc_func, &args);
619 if (bc->bc_flags & BC_F_COPYOUT)
620 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
624 if (!(ifp->if_flags & IFF_UP) &&
625 (ifp->if_flags & IFF_RUNNING)) {
627 * If interface is marked down and it is running,
631 } else if ((ifp->if_flags & IFF_UP) &&
632 !(ifp->if_flags & IFF_RUNNING)) {
634 * If interface is marked up and it is stopped, then
642 /* Do not allow the MTU to be changed on the bridge */
647 error = ether_ioctl(ifp, cmd, data);
656 * Clear or restore unwanted capabilities on the member interface
659 bridge_mutecaps(struct bridge_iflist *bif, int mute)
661 struct ifnet *ifp = bif->bif_ifp;
665 if (ifp->if_ioctl == NULL)
668 bzero(&ifr, sizeof(ifr));
669 ifr.ifr_reqcap = ifp->if_capenable;
672 /* mask off and save capabilities */
673 bif->bif_mutecap = ifr.ifr_reqcap & BRIDGE_IFCAPS_MASK;
674 if (bif->bif_mutecap != 0)
675 ifr.ifr_reqcap &= ~BRIDGE_IFCAPS_MASK;
677 /* restore muted capabilities */
678 ifr.ifr_reqcap |= bif->bif_mutecap;
681 if (bif->bif_mutecap != 0) {
682 lwkt_serialize_enter(ifp->if_serializer);
683 error = ifp->if_ioctl(ifp, SIOCSIFCAP, (caddr_t)&ifr, NULL);
684 lwkt_serialize_exit(ifp->if_serializer);
689 * bridge_lookup_member:
691 * Lookup a bridge member interface.
693 static struct bridge_iflist *
694 bridge_lookup_member(struct bridge_softc *sc, const char *name)
696 struct bridge_iflist *bif;
699 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
701 if (strcmp(ifp->if_xname, name) == 0)
709 * bridge_lookup_member_if:
711 * Lookup a bridge member interface by ifnet*.
713 static struct bridge_iflist *
714 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
716 struct bridge_iflist *bif;
718 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
719 if (bif->bif_ifp == member_ifp)
727 * bridge_delete_member:
729 * Delete the specified member interface.
732 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
735 struct ifnet *ifs = bif->bif_ifp;
736 struct ifnet *bifp = sc->sc_ifp;
738 ASSERT_SERIALIZED(bifp->if_serializer);
740 ifs->if_bridge = NULL;
743 * Release bridge interface's serializer:
744 * - To avoid possible dead lock.
745 * - netmsg_service_sync will block current thread.
747 lwkt_serialize_exit(bifp->if_serializer);
750 * Make sure that all protocol threads see 'ifs' if_bridge change.
752 netmsg_service_sync();
755 switch (ifs->if_type) {
759 * Take the interface out of promiscuous mode.
762 bridge_mutecaps(bif, 0);
769 panic("bridge_delete_member: impossible");
774 lwkt_serialize_enter(bifp->if_serializer);
776 LIST_REMOVE(bif, bif_next);
778 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
780 kfree(bif, M_DEVBUF);
782 if (sc->sc_ifp->if_flags & IFF_RUNNING)
783 bstp_initialization(sc);
787 * bridge_delete_span:
789 * Delete the specified span interface.
792 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
794 KASSERT(bif->bif_ifp->if_bridge == NULL,
795 ("%s: not a span interface", __func__));
797 LIST_REMOVE(bif, bif_next);
798 kfree(bif, M_DEVBUF);
802 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
804 struct ifbreq *req = arg;
805 struct bridge_iflist *bif = NULL;
806 struct ifnet *ifs, *bifp;
810 ASSERT_SERIALIZED(bifp->if_serializer);
812 ifs = ifunit(req->ifbr_ifsname);
816 /* If it's in the span list, it can't be a member. */
817 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
818 if (ifs == bif->bif_ifp)
821 /* Allow the first Ethernet member to define the MTU */
822 if (ifs->if_type != IFT_GIF) {
823 if (LIST_EMPTY(&sc->sc_iflist)) {
824 bifp->if_mtu = ifs->if_mtu;
825 } else if (bifp->if_mtu != ifs->if_mtu) {
826 if_printf(bifp, "invalid MTU for %s\n", ifs->if_xname);
831 if (ifs->if_bridge == sc)
834 if (ifs->if_bridge != NULL)
837 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK|M_ZERO);
839 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
840 bif->bif_priority = BSTP_DEFAULT_PORT_PRIORITY;
841 bif->bif_path_cost = BSTP_DEFAULT_PATH_COST;
843 switch (ifs->if_type) {
847 * Release bridge interface's serializer to
848 * avoid possible dead lock.
850 lwkt_serialize_exit(bifp->if_serializer);
853 * Place the interface into promiscuous mode.
855 error = ifpromisc(ifs, 1);
857 lwkt_serialize_enter(bifp->if_serializer);
861 bridge_mutecaps(bif, 1);
863 lwkt_serialize_enter(bifp->if_serializer);
866 case IFT_GIF: /* :^) */
874 LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
876 if (bifp->if_flags & IFF_RUNNING)
877 bstp_initialization(sc);
882 * Everything has been setup, so let the member interface
883 * deliver packets to this bridge on its input/output path.
889 kfree(bif, M_DEVBUF);
895 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
897 struct ifbreq *req = arg;
898 struct bridge_iflist *bif;
900 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
904 bridge_delete_member(sc, bif, 0);
910 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
912 struct ifbreq *req = arg;
913 struct bridge_iflist *bif;
915 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
919 req->ifbr_ifsflags = bif->bif_flags;
920 req->ifbr_state = bif->bif_state;
921 req->ifbr_priority = bif->bif_priority;
922 req->ifbr_path_cost = bif->bif_path_cost;
923 req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
929 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
931 struct ifbreq *req = arg;
932 struct bridge_iflist *bif;
934 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
938 if (req->ifbr_ifsflags & IFBIF_SPAN)
939 /* SPAN is readonly */
942 if (req->ifbr_ifsflags & IFBIF_STP) {
943 switch (bif->bif_ifp->if_type) {
945 /* These can do spanning tree. */
949 /* Nothing else can. */
954 bif->bif_flags = req->ifbr_ifsflags;
956 if (sc->sc_ifp->if_flags & IFF_RUNNING)
957 bstp_initialization(sc);
963 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
965 struct ifbrparam *param = arg;
967 sc->sc_brtmax = param->ifbrp_csize;
974 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
976 struct ifbrparam *param = arg;
978 param->ifbrp_csize = sc->sc_brtmax;
984 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
986 struct ifbifconf *bifc = arg;
987 struct bridge_iflist *bif;
989 int count, len, error = 0;
992 LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
994 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
997 if (bifc->ifbic_len == 0) {
998 bifc->ifbic_len = sizeof(breq) * count;
1003 len = bifc->ifbic_len;
1004 memset(&breq, 0, sizeof breq);
1005 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1006 if (len < sizeof(breq))
1009 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1010 sizeof(breq.ifbr_ifsname));
1011 breq.ifbr_ifsflags = bif->bif_flags;
1012 breq.ifbr_state = bif->bif_state;
1013 breq.ifbr_priority = bif->bif_priority;
1014 breq.ifbr_path_cost = bif->bif_path_cost;
1015 breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
1016 error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
1020 len -= sizeof(breq);
1022 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1023 if (len < sizeof(breq))
1026 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1027 sizeof(breq.ifbr_ifsname));
1028 breq.ifbr_ifsflags = bif->bif_flags;
1029 breq.ifbr_state = bif->bif_state;
1030 breq.ifbr_priority = bif->bif_priority;
1031 breq.ifbr_path_cost = bif->bif_path_cost;
1032 breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
1033 error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
1037 len -= sizeof(breq);
1040 bifc->ifbic_len = sizeof(breq) * count;
1045 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1047 struct ifbaconf *bac = arg;
1048 struct bridge_rtnode *brt;
1049 struct ifbareq bareq;
1050 int count = 0, error = 0, len;
1052 if (bac->ifbac_len == 0)
1055 len = bac->ifbac_len;
1056 memset(&bareq, 0, sizeof(bareq));
1057 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
1058 if (len < sizeof(bareq))
1060 strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
1061 sizeof(bareq.ifba_ifsname));
1062 memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1063 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1064 time_second < brt->brt_expire)
1065 bareq.ifba_expire = brt->brt_expire - time_second;
1067 bareq.ifba_expire = 0;
1068 bareq.ifba_flags = brt->brt_flags;
1070 error = copyout(&bareq, bac->ifbac_req + count, sizeof(bareq));
1074 len -= sizeof(bareq);
1077 bac->ifbac_len = sizeof(bareq) * count;
1082 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1084 struct ifbareq *req = arg;
1085 struct bridge_iflist *bif;
1088 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1092 error = bridge_rtupdate(sc, req->ifba_dst, bif->bif_ifp, 1,
1099 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1101 struct ifbrparam *param = arg;
1103 sc->sc_brttimeout = param->ifbrp_ctime;
1109 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1111 struct ifbrparam *param = arg;
1113 param->ifbrp_ctime = sc->sc_brttimeout;
1119 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1121 struct ifbareq *req = arg;
1123 return (bridge_rtdaddr(sc, req->ifba_dst));
1127 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1129 struct ifbreq *req = arg;
1131 bridge_rtflush(sc, req->ifbr_ifsflags);
1137 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1139 struct ifbrparam *param = arg;
1141 param->ifbrp_prio = sc->sc_bridge_priority;
1147 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1149 struct ifbrparam *param = arg;
1151 sc->sc_bridge_priority = param->ifbrp_prio;
1153 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1154 bstp_initialization(sc);
1160 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1162 struct ifbrparam *param = arg;
1164 param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
1170 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1172 struct ifbrparam *param = arg;
1174 if (param->ifbrp_hellotime == 0)
1176 sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
1178 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1179 bstp_initialization(sc);
1185 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1187 struct ifbrparam *param = arg;
1189 param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
1195 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1197 struct ifbrparam *param = arg;
1199 if (param->ifbrp_fwddelay == 0)
1201 sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
1203 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1204 bstp_initialization(sc);
1210 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1212 struct ifbrparam *param = arg;
1214 param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
1220 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1222 struct ifbrparam *param = arg;
1224 if (param->ifbrp_maxage == 0)
1226 sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
1228 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1229 bstp_initialization(sc);
1235 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1237 struct ifbreq *req = arg;
1238 struct bridge_iflist *bif;
1240 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1244 bif->bif_priority = req->ifbr_priority;
1246 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1247 bstp_initialization(sc);
1253 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1255 struct ifbreq *req = arg;
1256 struct bridge_iflist *bif;
1258 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1262 bif->bif_path_cost = req->ifbr_path_cost;
1264 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1265 bstp_initialization(sc);
1271 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1273 struct ifbreq *req = arg;
1274 struct bridge_iflist *bif = NULL;
1277 ifs = ifunit(req->ifbr_ifsname);
1281 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1282 if (ifs == bif->bif_ifp)
1285 if (ifs->if_bridge != NULL)
1288 switch (ifs->if_type) {
1297 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK|M_ZERO);
1300 bif->bif_flags = IFBIF_SPAN;
1302 LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1308 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1310 struct ifbreq *req = arg;
1311 struct bridge_iflist *bif;
1314 ifs = ifunit(req->ifbr_ifsname);
1318 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1319 if (ifs == bif->bif_ifp)
1325 bridge_delete_span(sc, bif);
1331 bridge_ifdetach_dispatch(struct netmsg *nmsg)
1333 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
1334 struct ifnet *ifp, *bifp;
1335 struct bridge_softc *sc;
1336 struct bridge_iflist *bif;
1338 ifp = lmsg->u.ms_resultp;
1339 sc = ifp->if_bridge;
1341 /* Check if the interface is a bridge member */
1345 lwkt_serialize_enter(bifp->if_serializer);
1347 bif = bridge_lookup_member_if(sc, ifp);
1349 bridge_delete_member(sc, bif, 1);
1351 /* XXX Why bif will be NULL? */
1354 lwkt_serialize_exit(bifp->if_serializer);
1358 crit_enter(); /* XXX MP */
1360 /* Check if the interface is a span port */
1361 LIST_FOREACH(sc, &bridge_list, sc_list) {
1364 lwkt_serialize_enter(bifp->if_serializer);
1366 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1367 if (ifp == bif->bif_ifp) {
1368 bridge_delete_span(sc, bif);
1372 lwkt_serialize_exit(bifp->if_serializer);
1378 lwkt_replymsg(lmsg, 0);
1384 * Detach an interface from a bridge. Called when a member
1385 * interface is detaching.
1388 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1390 struct lwkt_msg *lmsg;
1393 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_ifdetach_dispatch);
1394 lmsg = &nmsg.nm_lmsg;
1395 lmsg->u.ms_resultp = ifp;
1397 lwkt_domsg(cpu_portfn(0), lmsg, 0);
1403 * Initialize a bridge interface.
1406 bridge_init(void *xsc)
1408 struct bridge_softc *sc = (struct bridge_softc *)xsc;
1409 struct ifnet *ifp = sc->sc_ifp;
1411 ASSERT_SERIALIZED(ifp->if_serializer);
1413 if (ifp->if_flags & IFF_RUNNING)
1416 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1419 ifp->if_flags |= IFF_RUNNING;
1420 bstp_initialization(sc);
1427 * Stop the bridge interface.
1430 bridge_stop(struct ifnet *ifp)
1432 struct bridge_softc *sc = ifp->if_softc;
1434 ASSERT_SERIALIZED(ifp->if_serializer);
1436 if ((ifp->if_flags & IFF_RUNNING) == 0)
1439 callout_stop(&sc->sc_brcallout);
1442 bridge_rtflush(sc, IFBF_FLUSHDYN);
1444 ifp->if_flags &= ~IFF_RUNNING;
1448 bridge_enqueue_internal(struct ifnet *dst_ifp, struct mbuf *m,
1449 netisr_fn_t handler)
1451 struct netmsg_packet *nmp;
1453 int cpu = mycpu->gd_cpuid;
1455 nmp = &m->m_hdr.mh_netmsg;
1456 netmsg_init(&nmp->nm_netmsg, &netisr_apanic_rport, 0, handler);
1458 nmp->nm_netmsg.nm_lmsg.u.ms_resultp = dst_ifp;
1460 port = cpu_portfn(cpu);
1461 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
1465 bridge_pfil_enqueue(struct ifnet *dst_ifp, struct mbuf *m,
1468 netisr_fn_t handler;
1470 if (runfilt && (inet_pfil_hook.ph_hashooks > 0
1472 || inet6_pfil_hook.ph_hashooks > 0
1475 handler = bridge_pfil_enqueue_handler;
1477 handler = bridge_enqueue_handler;
1479 bridge_enqueue_internal(dst_ifp, m, handler);
1485 * Enqueue a packet on a bridge member interface.
1489 bridge_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
1491 bridge_enqueue_internal(dst_ifp, m, bridge_enqueue_handler);
1497 * Send output from a bridge member interface. This
1498 * performs the bridging function for locally originated
1501 * The mbuf has the Ethernet header already attached. We must
1502 * enqueue or free the mbuf before returning.
1505 bridge_output(struct ifnet *ifp, struct mbuf *m)
1507 struct bridge_softc *sc = ifp->if_bridge;
1508 struct ether_header *eh;
1509 struct ifnet *dst_if;
1511 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
1514 * Make sure that we are still a member of a bridge interface.
1521 if (m->m_len < ETHER_HDR_LEN) {
1522 m = m_pullup(m, ETHER_HDR_LEN);
1527 /* Serialize our bridge interface. */
1528 lwkt_serialize_enter(sc->sc_ifp->if_serializer);
1530 eh = mtod(m, struct ether_header *);
1533 * If bridge is down, but the original output interface is up,
1534 * go ahead and send out that interface. Otherwise, the packet
1537 if ((sc->sc_ifp->if_flags & IFF_RUNNING) == 0) {
1543 * If the packet is a multicast, or we don't know a better way to
1544 * get there, send to all interfaces.
1546 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1549 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1550 if (dst_if == NULL) {
1551 struct bridge_iflist *bif;
1557 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1558 dst_if = bif->bif_ifp;
1559 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1563 * If this is not the original output interface,
1564 * and the interface is participating in spanning
1565 * tree, make sure the port is in a state that
1566 * allows forwarding.
1568 if (dst_if != ifp &&
1569 (bif->bif_flags & IFBIF_STP) != 0) {
1570 switch (bif->bif_state) {
1571 case BSTP_IFSTATE_BLOCKING:
1572 case BSTP_IFSTATE_LISTENING:
1573 case BSTP_IFSTATE_DISABLED:
1578 if (LIST_NEXT(bif, bif_next) == NULL) {
1582 mc = m_copypacket(m, MB_DONTWAIT);
1584 sc->sc_ifp->if_oerrors++;
1588 bridge_enqueue(dst_if, mc);
1592 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
1598 * XXX Spanning tree consideration here?
1602 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
1603 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1606 bridge_enqueue(dst_if, m);
1613 * Start output on a bridge.
1617 bridge_start(struct ifnet *ifp)
1619 struct bridge_softc *sc = ifp->if_softc;
1621 ASSERT_SERIALIZED(ifp->if_serializer);
1623 ifp->if_flags |= IFF_OACTIVE;
1625 struct ifnet *dst_if = NULL;
1626 struct ether_header *eh;
1629 m = ifq_dequeue(&ifp->if_snd, NULL);
1633 if (m->m_len < sizeof(*eh)) {
1634 m = m_pullup(m, sizeof(*eh));
1640 eh = mtod(m, struct ether_header *);
1645 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0)
1646 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1649 bridge_broadcast(sc, ifp, m, 0);
1651 bridge_enqueue(dst_if, m);
1653 ifp->if_flags &= ~IFF_OACTIVE;
1659 * The forwarding function of the bridge.
1662 bridge_forward(struct bridge_softc *sc, struct mbuf *m)
1664 struct bridge_iflist *bif;
1665 struct ifnet *src_if, *dst_if, *ifp;
1666 struct ether_header *eh;
1668 src_if = m->m_pkthdr.rcvif;
1671 ASSERT_SERIALIZED(ifp->if_serializer);
1674 ifp->if_ibytes += m->m_pkthdr.len;
1677 * Look up the bridge_iflist.
1679 bif = bridge_lookup_member_if(sc, src_if);
1681 /* Interface is not a bridge member (anymore?) */
1686 if (bif->bif_flags & IFBIF_STP) {
1687 switch (bif->bif_state) {
1688 case BSTP_IFSTATE_BLOCKING:
1689 case BSTP_IFSTATE_LISTENING:
1690 case BSTP_IFSTATE_DISABLED:
1696 eh = mtod(m, struct ether_header *);
1699 * If the interface is learning, and the source
1700 * address is valid and not multicast, record
1703 if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
1704 ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
1705 (eh->ether_shost[0] == 0 &&
1706 eh->ether_shost[1] == 0 &&
1707 eh->ether_shost[2] == 0 &&
1708 eh->ether_shost[3] == 0 &&
1709 eh->ether_shost[4] == 0 &&
1710 eh->ether_shost[5] == 0) == 0) {
1711 bridge_rtupdate(sc, eh->ether_shost, src_if, 0, IFBAF_DYNAMIC);
1714 if ((bif->bif_flags & IFBIF_STP) != 0 &&
1715 bif->bif_state == BSTP_IFSTATE_LEARNING) {
1721 * At this point, the port either doesn't participate
1722 * in spanning tree or it is in the forwarding state.
1726 * If the packet is unicast, destined for someone on
1727 * "this" side of the bridge, drop it.
1729 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
1730 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1731 if (src_if == dst_if) {
1736 /* ...forward it to all interfaces. */
1737 sc->sc_ifp->if_imcasts++;
1741 if (dst_if == NULL) {
1742 bridge_broadcast(sc, src_if, m, 1);
1747 * At this point, we're dealing with a unicast frame
1748 * going to a different interface.
1750 if ((dst_if->if_flags & IFF_RUNNING) == 0) {
1754 bif = bridge_lookup_member_if(sc, dst_if);
1756 /* Not a member of the bridge (anymore?) */
1761 if (bif->bif_flags & IFBIF_STP) {
1762 switch (bif->bif_state) {
1763 case BSTP_IFSTATE_DISABLED:
1764 case BSTP_IFSTATE_BLOCKING:
1770 lwkt_serialize_exit(ifp->if_serializer);
1772 /* run the packet filter */
1773 if (inet_pfil_hook.ph_hashooks > 0
1775 || inet6_pfil_hook.ph_hashooks > 0
1778 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
1783 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
1788 bridge_handoff(dst_if, m);
1791 * ifp's serializer was held on entry and is expected to be held
1795 lwkt_serialize_enter(ifp->if_serializer);
1801 * Receive input from a member interface. Queue the packet for
1802 * bridging if it is not for us.
1804 static struct mbuf *
1805 bridge_input(struct ifnet *ifp, struct mbuf *m)
1807 struct bridge_softc *sc = ifp->if_bridge;
1808 struct bridge_iflist *bif;
1809 struct ifnet *bifp, *new_ifp;
1810 struct ether_header *eh;
1811 struct mbuf *mc, *mc2;
1814 * Make sure that we are still a member of a bridge interface.
1822 lwkt_serialize_enter(bifp->if_serializer);
1824 if ((bifp->if_flags & IFF_RUNNING) == 0)
1828 * Implement support for bridge monitoring. If this flag has been
1829 * set on this interface, discard the packet once we push it through
1830 * the bpf(4) machinery, but before we do, increment the byte and
1831 * packet counters associated with this interface.
1833 if ((bifp->if_flags & IFF_MONITOR) != 0) {
1834 m->m_pkthdr.rcvif = bifp;
1836 bifp->if_ipackets++;
1837 bifp->if_ibytes += m->m_pkthdr.len;
1843 eh = mtod(m, struct ether_header *);
1845 m->m_flags &= ~M_PROTO1; /* XXX Hack - loop prevention */
1847 if (memcmp(eh->ether_dhost, IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
1849 * If the packet is for us, set the packets source as the
1850 * bridge, and return the packet back to ifnet.if_input for
1853 KASSERT(bifp->if_bridge == NULL,
1854 ("loop created in bridge_input"));
1860 * Tap all packets arriving on the bridge, no matter if
1861 * they are local destinations or not. In is in.
1865 bif = bridge_lookup_member_if(sc, ifp);
1871 if (m->m_flags & (M_BCAST | M_MCAST)) {
1872 /* Tap off 802.1D packets; they do not get forwarded. */
1873 if (memcmp(eh->ether_dhost, bstp_etheraddr,
1874 ETHER_ADDR_LEN) == 0) {
1875 m = bstp_input(sc, bif, m);
1877 ("attempt to deliver 802.1D packet\n"));
1881 if (bif->bif_flags & IFBIF_STP) {
1882 switch (bif->bif_state) {
1883 case BSTP_IFSTATE_BLOCKING:
1884 case BSTP_IFSTATE_LISTENING:
1885 case BSTP_IFSTATE_DISABLED:
1891 * Make a deep copy of the packet and enqueue the copy
1892 * for bridge processing; return the original packet for
1895 mc = m_dup(m, MB_DONTWAIT);
1899 bridge_forward(sc, mc);
1902 * Reinject the mbuf as arriving on the bridge so we have a
1903 * chance at claiming multicast packets. We can not loop back
1904 * here from ether_input as a bridge is never a member of a
1907 KASSERT(bifp->if_bridge == NULL,
1908 ("loop created in bridge_input"));
1909 mc2 = m_dup(m, MB_DONTWAIT);
1912 /* Keep the layer3 header aligned */
1913 int i = min(mc2->m_pkthdr.len, max_protohdr);
1914 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
1918 mc2->m_pkthdr.rcvif = bifp;
1919 bifp->if_ipackets++;
1920 bifp->if_input(bifp, mc2);
1923 /* Return the original packet for local processing. */
1927 if (bif->bif_flags & IFBIF_STP) {
1928 switch (bif->bif_state) {
1929 case BSTP_IFSTATE_BLOCKING:
1930 case BSTP_IFSTATE_LISTENING:
1931 case BSTP_IFSTATE_DISABLED:
1937 * Unicast. Make sure it's not for us.
1939 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1940 if (bif->bif_ifp->if_type != IFT_ETHER)
1943 /* It is destined for us. */
1944 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_dhost,
1945 ETHER_ADDR_LEN) == 0) {
1946 if (bif->bif_flags & IFBIF_LEARNING) {
1948 eh->ether_shost, ifp, 0, IFBAF_DYNAMIC);
1951 if (bif->bif_ifp != ifp) {
1952 /* XXX loop prevention */
1953 m->m_flags |= M_PROTO1;
1954 new_ifp = bif->bif_ifp;
1959 /* We just received a packet that we sent out. */
1960 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
1961 ETHER_ADDR_LEN) == 0) {
1968 /* Perform the bridge forwarding function. */
1969 bridge_forward(sc, m);
1972 lwkt_serialize_exit(bifp->if_serializer);
1974 if (new_ifp != NULL) {
1975 lwkt_serialize_enter(new_ifp->if_serializer);
1977 m->m_pkthdr.rcvif = new_ifp;
1978 new_ifp->if_ipackets++;
1979 new_ifp->if_input(new_ifp, m);
1982 lwkt_serialize_exit(new_ifp->if_serializer);
1990 * Send a frame to all interfaces that are members of
1991 * the bridge, except for the one on which the packet
1995 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
1996 struct mbuf *m, int runfilt)
1998 struct bridge_iflist *bif;
2000 struct ifnet *dst_if, *bifp;
2005 ASSERT_SERIALIZED(bifp->if_serializer);
2007 /* run the packet filter */
2008 if (runfilt && (inet_pfil_hook.ph_hashooks > 0
2010 || inet6_pfil_hook.ph_hashooks > 0
2013 lwkt_serialize_exit(bifp->if_serializer);
2015 /* Filter on the bridge interface before broadcasting */
2017 if (bridge_pfil(&m, bifp, src_if, PFIL_IN) != 0)
2022 if (bridge_pfil(&m, bifp, NULL, PFIL_OUT) != 0)
2025 lwkt_serialize_enter(bifp->if_serializer);
2030 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
2031 dst_if = bif->bif_ifp;
2032 if (dst_if == src_if)
2035 if (bif->bif_flags & IFBIF_STP) {
2036 switch (bif->bif_state) {
2037 case BSTP_IFSTATE_BLOCKING:
2038 case BSTP_IFSTATE_DISABLED:
2043 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2044 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2047 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2050 if (LIST_NEXT(bif, bif_next) == NULL) {
2054 mc = m_copypacket(m, MB_DONTWAIT);
2056 sc->sc_ifp->if_oerrors++;
2060 bridge_pfil_enqueue(dst_if, mc, runfilt);
2069 * Duplicate a packet out one or more interfaces that are in span mode,
2070 * the original mbuf is unmodified.
2073 bridge_span(struct bridge_softc *sc, struct mbuf *m)
2075 struct bridge_iflist *bif;
2076 struct ifnet *dst_if;
2079 if (LIST_EMPTY(&sc->sc_spanlist))
2082 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2083 dst_if = bif->bif_ifp;
2085 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2088 mc = m_copypacket(m, MB_DONTWAIT);
2090 sc->sc_ifp->if_oerrors++;
2094 bridge_enqueue(dst_if, mc);
2101 * Add a bridge routing entry.
2102 * Can be called from interrupt context.
2105 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
2106 struct ifnet *dst_if, int setflags, uint8_t flags)
2108 struct bridge_rtnode *brt;
2112 * A route for this destination might already exist. If so,
2113 * update it, otherwise create a new one.
2115 if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
2116 if (sc->sc_brtcnt >= sc->sc_brtmax)
2120 * Allocate a new bridge forwarding node, and
2121 * initialize the expiration time and Ethernet
2124 brt = kmalloc(sizeof(struct bridge_rtnode), M_DEVBUF,
2125 M_INTNOWAIT|M_ZERO);
2129 brt->brt_flags = IFBAF_DYNAMIC;
2130 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2132 if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
2133 kfree(brt, M_DEVBUF);
2138 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2139 brt->brt_ifp = dst_if;
2140 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2141 brt->brt_expire = time_second + sc->sc_brttimeout;
2143 brt->brt_flags = flags;
2151 * Lookup the destination interface for an address.
2153 static struct ifnet *
2154 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
2156 struct bridge_rtnode *brt;
2158 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2161 return (brt->brt_ifp);
2167 * Trim the routine table so that we have a number
2168 * of routing entries less than or equal to the
2172 bridge_rttrim(struct bridge_softc *sc)
2174 struct bridge_rtnode *brt, *nbrt;
2176 /* Make sure we actually need to do this. */
2177 if (sc->sc_brtcnt <= sc->sc_brtmax)
2180 /* Force an aging cycle; this might trim enough addresses. */
2182 if (sc->sc_brtcnt <= sc->sc_brtmax)
2185 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2186 nbrt = LIST_NEXT(brt, brt_list);
2187 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2188 bridge_rtnode_destroy(sc, brt);
2189 if (sc->sc_brtcnt <= sc->sc_brtmax)
2198 * Aging timer for the bridge.
2201 bridge_timer(void *arg)
2203 struct bridge_softc *sc = arg;
2205 lwkt_serialize_enter(sc->sc_ifp->if_serializer);
2209 if (sc->sc_ifp->if_flags & IFF_RUNNING)
2210 callout_reset(&sc->sc_brcallout,
2211 bridge_rtable_prune_period * hz, bridge_timer, sc);
2213 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
2219 * Perform an aging cycle.
2222 bridge_rtage(struct bridge_softc *sc)
2224 struct bridge_rtnode *brt, *nbrt;
2226 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2227 nbrt = LIST_NEXT(brt, brt_list);
2228 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2229 if (time_second >= brt->brt_expire)
2230 bridge_rtnode_destroy(sc, brt);
2238 * Remove all dynamic addresses from the bridge.
2241 bridge_rtflush(struct bridge_softc *sc, int full)
2243 struct bridge_rtnode *brt, *nbrt;
2245 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2246 nbrt = LIST_NEXT(brt, brt_list);
2247 if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2248 bridge_rtnode_destroy(sc, brt);
2255 * Remove an address from the table.
2258 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
2260 struct bridge_rtnode *brt;
2262 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2265 bridge_rtnode_destroy(sc, brt);
2272 * Delete routes to a speicifc member interface.
2275 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
2277 struct bridge_rtnode *brt, *nbrt;
2279 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2280 nbrt = LIST_NEXT(brt, brt_list);
2281 if (brt->brt_ifp == ifp && (full ||
2282 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
2283 bridge_rtnode_destroy(sc, brt);
2288 * bridge_rtable_init:
2290 * Initialize the route table for this bridge.
2293 bridge_rtable_init(struct bridge_softc *sc)
2297 sc->sc_rthash = kmalloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
2298 M_DEVBUF, M_WAITOK);
2300 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
2301 LIST_INIT(&sc->sc_rthash[i]);
2303 sc->sc_rthash_key = karc4random();
2305 LIST_INIT(&sc->sc_rtlist);
2311 * bridge_rtable_fini:
2313 * Deconstruct the route table for this bridge.
2316 bridge_rtable_fini(struct bridge_softc *sc)
2319 kfree(sc->sc_rthash, M_DEVBUF);
2323 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2324 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2326 #define mix(a, b, c) \
2328 a -= b; a -= c; a ^= (c >> 13); \
2329 b -= c; b -= a; b ^= (a << 8); \
2330 c -= a; c -= b; c ^= (b >> 13); \
2331 a -= b; a -= c; a ^= (c >> 12); \
2332 b -= c; b -= a; b ^= (a << 16); \
2333 c -= a; c -= b; c ^= (b >> 5); \
2334 a -= b; a -= c; a ^= (c >> 3); \
2335 b -= c; b -= a; b ^= (a << 10); \
2336 c -= a; c -= b; c ^= (b >> 15); \
2337 } while (/*CONSTCOND*/0)
2339 static __inline uint32_t
2340 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
2342 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
2353 return (c & BRIDGE_RTHASH_MASK);
2359 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
2363 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
2364 d = ((int)a[i]) - ((int)b[i]);
2371 * bridge_rtnode_lookup:
2373 * Look up a bridge route node for the specified destination.
2375 static struct bridge_rtnode *
2376 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
2378 struct bridge_rtnode *brt;
2382 hash = bridge_rthash(sc, addr);
2383 LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
2384 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
2395 * bridge_rtnode_insert:
2397 * Insert the specified bridge node into the route table. We
2398 * assume the entry is not already in the table.
2401 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
2403 struct bridge_rtnode *lbrt;
2407 hash = bridge_rthash(sc, brt->brt_addr);
2409 lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
2411 LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
2416 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
2420 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
2423 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
2424 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
2427 lbrt = LIST_NEXT(lbrt, brt_hash);
2428 } while (lbrt != NULL);
2431 panic("bridge_rtnode_insert: impossible");
2435 LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
2442 * bridge_rtnode_destroy:
2444 * Destroy a bridge rtnode.
2447 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
2450 LIST_REMOVE(brt, brt_hash);
2452 LIST_REMOVE(brt, brt_list);
2454 kfree(brt, M_DEVBUF);
2458 bridge_post_pfil(struct mbuf *m)
2460 if (m->m_pkthdr.fw_flags & IPFORWARD_MBUF_TAGGED)
2464 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED)
2471 * Send bridge packets through pfil if they are one of the types pfil can deal
2472 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
2473 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
2477 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
2479 int snap, error, i, hlen;
2480 struct ether_header *eh1, eh2;
2483 u_int16_t ether_type;
2486 error = -1; /* Default error if not error == 0 */
2488 if (pfil_bridge == 0 && pfil_member == 0)
2489 return (0); /* filtering is disabled */
2491 i = min((*mp)->m_pkthdr.len, max_protohdr);
2492 if ((*mp)->m_len < i) {
2493 *mp = m_pullup(*mp, i);
2495 kprintf("%s: m_pullup failed\n", __func__);
2500 eh1 = mtod(*mp, struct ether_header *);
2501 ether_type = ntohs(eh1->ether_type);
2504 * Check for SNAP/LLC.
2506 if (ether_type < ETHERMTU) {
2507 struct llc *llc2 = (struct llc *)(eh1 + 1);
2509 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
2510 llc2->llc_dsap == LLC_SNAP_LSAP &&
2511 llc2->llc_ssap == LLC_SNAP_LSAP &&
2512 llc2->llc_control == LLC_UI) {
2513 ether_type = htons(llc2->llc_un.type_snap.ether_type);
2519 * If we're trying to filter bridge traffic, don't look at anything
2520 * other than IP and ARP traffic. If the filter doesn't understand
2521 * IPv6, don't allow IPv6 through the bridge either. This is lame
2522 * since if we really wanted, say, an AppleTalk filter, we are hosed,
2523 * but of course we don't have an AppleTalk filter to begin with.
2524 * (Note that since pfil doesn't understand ARP it will pass *ALL*
2527 switch (ether_type) {
2529 case ETHERTYPE_REVARP:
2530 return (0); /* Automatically pass */
2533 case ETHERTYPE_IPV6:
2538 * Check to see if the user wants to pass non-ip
2539 * packets, these will not be checked by pfil(9) and
2540 * passed unconditionally so the default is to drop.
2546 /* Strip off the Ethernet header and keep a copy. */
2547 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
2548 m_adj(*mp, ETHER_HDR_LEN);
2550 /* Strip off snap header, if present */
2552 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
2553 m_adj(*mp, sizeof(struct llc));
2557 * Check the IP header for alignment and errors
2559 if (dir == PFIL_IN) {
2560 switch (ether_type) {
2562 error = bridge_ip_checkbasic(mp);
2565 case ETHERTYPE_IPV6:
2566 error = bridge_ip6_checkbasic(mp);
2579 * Run the packet through pfil
2585 * before calling the firewall, swap fields the same as
2586 * IP does. here we assume the header is contiguous
2588 ip = mtod(*mp, struct ip *);
2590 ip->ip_len = ntohs(ip->ip_len);
2591 ip->ip_off = ntohs(ip->ip_off);
2594 * Run pfil on the member interface and the bridge, both can
2595 * be skipped by clearing pfil_member or pfil_bridge.
2598 * in_if -> bridge_if -> out_if
2600 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL) {
2601 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
2602 if (*mp == NULL || error != 0) /* filter may consume */
2604 error = bridge_post_pfil(*mp);
2609 if (pfil_member && ifp != NULL) {
2610 error = pfil_run_hooks(&inet_pfil_hook, mp, ifp, dir);
2611 if (*mp == NULL || error != 0) /* filter may consume */
2613 error = bridge_post_pfil(*mp);
2618 if (pfil_bridge && dir == PFIL_IN && bifp != NULL) {
2619 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
2620 if (*mp == NULL || error != 0) /* filter may consume */
2622 error = bridge_post_pfil(*mp);
2627 /* check if we need to fragment the packet */
2628 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
2629 i = (*mp)->m_pkthdr.len;
2630 if (i > ifp->if_mtu) {
2631 error = bridge_fragment(ifp, *mp, &eh2, snap,
2637 /* Recalculate the ip checksum and restore byte ordering */
2638 ip = mtod(*mp, struct ip *);
2639 hlen = ip->ip_hl << 2;
2640 if (hlen < sizeof(struct ip))
2642 if (hlen > (*mp)->m_len) {
2643 if ((*mp = m_pullup(*mp, hlen)) == 0)
2645 ip = mtod(*mp, struct ip *);
2649 ip->ip_len = htons(ip->ip_len);
2650 ip->ip_off = htons(ip->ip_off);
2652 if (hlen == sizeof(struct ip))
2653 ip->ip_sum = in_cksum_hdr(ip);
2655 ip->ip_sum = in_cksum(*mp, hlen);
2659 case ETHERTYPE_IPV6 :
2660 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
2661 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
2664 if (*mp == NULL || error != 0) /* filter may consume */
2667 if (pfil_member && ifp != NULL)
2668 error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
2671 if (*mp == NULL || error != 0) /* filter may consume */
2674 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
2675 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
2692 * Finally, put everything back the way it was and return
2695 M_PREPEND(*mp, sizeof(struct llc), MB_DONTWAIT);
2698 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
2701 M_PREPEND(*mp, ETHER_HDR_LEN, MB_DONTWAIT);
2704 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
2715 * Perform basic checks on header size since
2716 * pfil assumes ip_input has already processed
2717 * it for it. Cut-and-pasted from ip_input.c.
2718 * Given how simple the IPv6 version is,
2719 * does the IPv4 version really need to be
2722 * XXX Should we update ipstat here, or not?
2723 * XXX Right now we update ipstat but not
2727 bridge_ip_checkbasic(struct mbuf **mp)
2729 struct mbuf *m = *mp;
2737 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
2738 if ((m = m_copyup(m, sizeof(struct ip),
2739 (max_linkhdr + 3) & ~3)) == NULL) {
2740 /* XXXJRT new stat, please */
2741 ipstat.ips_toosmall++;
2746 #ifndef __predict_false
2747 #define __predict_false(x) x
2749 if (__predict_false(m->m_len < sizeof (struct ip))) {
2750 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
2751 ipstat.ips_toosmall++;
2755 ip = mtod(m, struct ip *);
2756 if (ip == NULL) goto bad;
2758 if (ip->ip_v != IPVERSION) {
2759 ipstat.ips_badvers++;
2762 hlen = ip->ip_hl << 2;
2763 if (hlen < sizeof(struct ip)) { /* minimum header length */
2764 ipstat.ips_badhlen++;
2767 if (hlen > m->m_len) {
2768 if ((m = m_pullup(m, hlen)) == 0) {
2769 ipstat.ips_badhlen++;
2772 ip = mtod(m, struct ip *);
2773 if (ip == NULL) goto bad;
2776 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
2777 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
2779 if (hlen == sizeof(struct ip)) {
2780 sum = in_cksum_hdr(ip);
2782 sum = in_cksum(m, hlen);
2786 ipstat.ips_badsum++;
2790 /* Retrieve the packet length. */
2791 len = ntohs(ip->ip_len);
2794 * Check for additional length bogosity
2797 ipstat.ips_badlen++;
2802 * Check that the amount of data in the buffers
2803 * is as at least much as the IP header would have us expect.
2804 * Drop packet if shorter than we expect.
2806 if (m->m_pkthdr.len < len) {
2807 ipstat.ips_tooshort++;
2811 /* Checks out, proceed */
2822 * Same as above, but for IPv6.
2823 * Cut-and-pasted from ip6_input.c.
2824 * XXX Should we update ip6stat, or not?
2827 bridge_ip6_checkbasic(struct mbuf **mp)
2829 struct mbuf *m = *mp;
2830 struct ip6_hdr *ip6;
2833 * If the IPv6 header is not aligned, slurp it up into a new
2834 * mbuf with space for link headers, in the event we forward
2835 * it. Otherwise, if it is aligned, make sure the entire base
2836 * IPv6 header is in the first mbuf of the chain.
2839 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
2840 struct ifnet *inifp = m->m_pkthdr.rcvif;
2841 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
2842 (max_linkhdr + 3) & ~3)) == NULL) {
2843 /* XXXJRT new stat, please */
2844 ip6stat.ip6s_toosmall++;
2845 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2850 if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
2851 struct ifnet *inifp = m->m_pkthdr.rcvif;
2852 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
2853 ip6stat.ip6s_toosmall++;
2854 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2859 ip6 = mtod(m, struct ip6_hdr *);
2861 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
2862 ip6stat.ip6s_badvers++;
2863 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
2867 /* Checks out, proceed */
2880 * Return a fragmented mbuf chain.
2883 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
2884 int snap, struct llc *llc)
2890 if (m->m_len < sizeof(struct ip) &&
2891 (m = m_pullup(m, sizeof(struct ip))) == NULL)
2893 ip = mtod(m, struct ip *);
2895 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
2900 /* walk the chain and re-add the Ethernet header */
2901 for (m0 = m; m0; m0 = m0->m_nextpkt) {
2904 M_PREPEND(m0, sizeof(struct llc), MB_DONTWAIT);
2909 bcopy(llc, mtod(m0, caddr_t),
2910 sizeof(struct llc));
2912 M_PREPEND(m0, ETHER_HDR_LEN, MB_DONTWAIT);
2917 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
2923 ipstat.ips_fragmented++;
2934 bridge_enqueue_handler(struct netmsg *nmsg)
2936 struct netmsg_packet *nmp;
2937 struct ifnet *dst_ifp;
2940 nmp = (struct netmsg_packet *)nmsg;
2942 dst_ifp = nmp->nm_netmsg.nm_lmsg.u.ms_resultp;
2944 bridge_handoff_notags(dst_ifp, m);
2948 bridge_pfil_enqueue_handler(struct netmsg *nmsg)
2950 struct netmsg_packet *nmp;
2951 struct ifnet *dst_ifp;
2954 nmp = (struct netmsg_packet *)nmsg;
2956 dst_ifp = nmp->nm_netmsg.nm_lmsg.u.ms_resultp;
2959 * Filter on the output interface. Pass a NULL bridge interface
2960 * pointer so we do not redundantly filter on the bridge for
2961 * each interface we broadcast on.
2963 if (inet_pfil_hook.ph_hashooks > 0
2965 || inet6_pfil_hook.ph_hashooks > 0
2968 if (bridge_pfil(&m, NULL, dst_ifp, PFIL_OUT) != 0)
2973 bridge_handoff_notags(dst_ifp, m);
2977 bridge_handoff(struct ifnet *dst_ifp, struct mbuf *m)
2979 bridge_handoff_notags(dst_ifp, m);
2983 bridge_handoff_notags(struct ifnet *dst_ifp, struct mbuf *m)
2987 lwkt_serialize_enter(dst_ifp->if_serializer);
2989 /* We may be sending a fragment so traverse the mbuf */
2991 struct altq_pktattr pktattr;
2994 m->m_nextpkt = NULL;
2996 if (ifq_is_enabled(&dst_ifp->if_snd))
2997 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
2999 ifq_handoff(dst_ifp, m, &pktattr);
3002 lwkt_serialize_exit(dst_ifp->if_serializer);
3005 struct netmsg_brgctl {
3006 struct netmsg bc_nmsg;
3007 bridge_ctl_t bc_func;
3008 struct bridge_softc *bc_sc;
3013 bridge_control_dispatch(struct netmsg *nmsg)
3015 struct netmsg_brgctl *bc_msg = (struct netmsg_brgctl *)nmsg;
3016 struct ifnet *bifp = bc_msg->bc_sc->sc_ifp;
3019 lwkt_serialize_enter(bifp->if_serializer);
3020 error = bc_msg->bc_func(bc_msg->bc_sc, bc_msg->bc_arg);
3021 lwkt_serialize_exit(bifp->if_serializer);
3023 lwkt_replymsg(&nmsg->nm_lmsg, error);
3027 bridge_control(struct bridge_softc *sc, u_long cmd,
3028 bridge_ctl_t bc_func, void *bc_arg)
3030 struct ifnet *bifp = sc->sc_ifp;
3031 struct netmsg_brgctl bc_msg;
3032 struct netmsg *nmsg;
3035 ASSERT_SERIALIZED(bifp->if_serializer);
3037 if (cmd == SIOCGDRVSPEC) {
3039 * Don't dispatch 'get' ioctl to netisr0;
3040 * there are copyouts down deep inside
3041 * specific bridge ioctl functions.
3043 return bc_func(sc, bc_arg);
3046 bzero(&bc_msg, sizeof(bc_msg));
3047 nmsg = &bc_msg.bc_nmsg;
3049 netmsg_init(nmsg, &curthread->td_msgport, 0, bridge_control_dispatch);
3050 bc_msg.bc_func = bc_func;
3052 bc_msg.bc_arg = bc_arg;
3054 lwkt_serialize_exit(bifp->if_serializer);
3055 error = lwkt_domsg(cpu_portfn(0), &nmsg->nm_lmsg, 0);
3056 lwkt_serialize_enter(bifp->if_serializer);