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 1.48 2008/11/14 12:48:06 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_handler(struct netmsg *);
204 static void bridge_timer(void *);
206 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
208 static void bridge_span(struct bridge_softc *, struct mbuf *);
210 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
211 struct ifnet *, int, uint8_t);
212 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *);
213 static void bridge_rttrim(struct bridge_softc *);
214 static void bridge_rtage(struct bridge_softc *);
215 static void bridge_rtflush(struct bridge_softc *, int);
216 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *);
218 static int bridge_rtable_init(struct bridge_softc *);
219 static void bridge_rtable_fini(struct bridge_softc *);
221 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
222 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
224 static int bridge_rtnode_insert(struct bridge_softc *,
225 struct bridge_rtnode *);
226 static void bridge_rtnode_destroy(struct bridge_softc *,
227 struct bridge_rtnode *);
229 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
231 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
233 static void bridge_delete_member(struct bridge_softc *,
234 struct bridge_iflist *, int);
235 static void bridge_delete_span(struct bridge_softc *,
236 struct bridge_iflist *);
238 static int bridge_control(struct bridge_softc *, u_long,
239 bridge_ctl_t, void *);
240 static int bridge_ioctl_init(struct bridge_softc *, void *);
241 static int bridge_ioctl_stop(struct bridge_softc *, void *);
242 static int bridge_ioctl_add(struct bridge_softc *, void *);
243 static int bridge_ioctl_del(struct bridge_softc *, void *);
244 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
245 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
246 static int bridge_ioctl_scache(struct bridge_softc *, void *);
247 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
248 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
249 static int bridge_ioctl_rts(struct bridge_softc *, void *);
250 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
251 static int bridge_ioctl_sto(struct bridge_softc *, void *);
252 static int bridge_ioctl_gto(struct bridge_softc *, void *);
253 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
254 static int bridge_ioctl_flush(struct bridge_softc *, void *);
255 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
256 static int bridge_ioctl_spri(struct bridge_softc *, void *);
257 static int bridge_ioctl_ght(struct bridge_softc *, void *);
258 static int bridge_ioctl_sht(struct bridge_softc *, void *);
259 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
260 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
261 static int bridge_ioctl_gma(struct bridge_softc *, void *);
262 static int bridge_ioctl_sma(struct bridge_softc *, void *);
263 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
264 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
265 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
266 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
267 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
269 static int bridge_ip_checkbasic(struct mbuf **mp);
271 static int bridge_ip6_checkbasic(struct mbuf **mp);
273 static int bridge_fragment(struct ifnet *, struct mbuf *,
274 struct ether_header *, int, struct llc *);
275 static void bridge_enqueue_internal(struct ifnet *, struct mbuf *m,
277 static void bridge_enqueue_handler(struct netmsg *);
278 static void bridge_pfil_enqueue_handler(struct netmsg *);
279 static void bridge_pfil_enqueue(struct ifnet *, struct mbuf *, int);
280 static void bridge_handoff(struct ifnet *, struct mbuf *);
282 SYSCTL_DECL(_net_link);
283 SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
285 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
286 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
287 static int pfil_member = 1; /* run pfil hooks on the member interface */
288 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
289 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
290 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
291 &pfil_bridge, 0, "Packet filter on the bridge interface");
292 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
293 &pfil_member, 0, "Packet filter on the member interface");
295 struct bridge_control {
296 bridge_ctl_t bc_func;
301 #define BC_F_COPYIN 0x01 /* copy arguments in */
302 #define BC_F_COPYOUT 0x02 /* copy arguments out */
303 #define BC_F_SUSER 0x04 /* do super-user check */
305 const struct bridge_control bridge_control_table[] = {
306 { bridge_ioctl_add, sizeof(struct ifbreq),
307 BC_F_COPYIN|BC_F_SUSER },
308 { bridge_ioctl_del, sizeof(struct ifbreq),
309 BC_F_COPYIN|BC_F_SUSER },
311 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
312 BC_F_COPYIN|BC_F_COPYOUT },
313 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
314 BC_F_COPYIN|BC_F_SUSER },
316 { bridge_ioctl_scache, sizeof(struct ifbrparam),
317 BC_F_COPYIN|BC_F_SUSER },
318 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
321 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
322 BC_F_COPYIN|BC_F_COPYOUT },
323 { bridge_ioctl_rts, sizeof(struct ifbaconf),
324 BC_F_COPYIN|BC_F_COPYOUT },
326 { bridge_ioctl_saddr, sizeof(struct ifbareq),
327 BC_F_COPYIN|BC_F_SUSER },
329 { bridge_ioctl_sto, sizeof(struct ifbrparam),
330 BC_F_COPYIN|BC_F_SUSER },
331 { bridge_ioctl_gto, sizeof(struct ifbrparam),
334 { bridge_ioctl_daddr, sizeof(struct ifbareq),
335 BC_F_COPYIN|BC_F_SUSER },
337 { bridge_ioctl_flush, sizeof(struct ifbreq),
338 BC_F_COPYIN|BC_F_SUSER },
340 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
342 { bridge_ioctl_spri, sizeof(struct ifbrparam),
343 BC_F_COPYIN|BC_F_SUSER },
345 { bridge_ioctl_ght, sizeof(struct ifbrparam),
347 { bridge_ioctl_sht, sizeof(struct ifbrparam),
348 BC_F_COPYIN|BC_F_SUSER },
350 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
352 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
353 BC_F_COPYIN|BC_F_SUSER },
355 { bridge_ioctl_gma, sizeof(struct ifbrparam),
357 { bridge_ioctl_sma, sizeof(struct ifbrparam),
358 BC_F_COPYIN|BC_F_SUSER },
360 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
361 BC_F_COPYIN|BC_F_SUSER },
363 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
364 BC_F_COPYIN|BC_F_SUSER },
366 { bridge_ioctl_addspan, sizeof(struct ifbreq),
367 BC_F_COPYIN|BC_F_SUSER },
368 { bridge_ioctl_delspan, sizeof(struct ifbreq),
369 BC_F_COPYIN|BC_F_SUSER },
371 const int bridge_control_table_size =
372 sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
374 LIST_HEAD(, bridge_softc) bridge_list;
376 struct if_clone bridge_cloner = IF_CLONE_INITIALIZER("bridge",
378 bridge_clone_destroy, 0, IF_MAXUNIT);
381 bridge_modevent(module_t mod, int type, void *data)
385 LIST_INIT(&bridge_list);
386 if_clone_attach(&bridge_cloner);
387 bridge_input_p = bridge_input;
388 bridge_output_p = bridge_output;
389 bridge_detach_cookie = EVENTHANDLER_REGISTER(
390 ifnet_detach_event, bridge_ifdetach, NULL,
391 EVENTHANDLER_PRI_ANY);
393 bstp_linkstate_p = bstp_linkstate;
397 if (!LIST_EMPTY(&bridge_list))
399 EVENTHANDLER_DEREGISTER(ifnet_detach_event,
400 bridge_detach_cookie);
401 if_clone_detach(&bridge_cloner);
402 bridge_input_p = NULL;
403 bridge_output_p = NULL;
405 bstp_linkstate_p = NULL;
414 static moduledata_t bridge_mod = {
420 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
424 * bridge_clone_create:
426 * Create a new bridge instance.
429 bridge_clone_create(struct if_clone *ifc, int unit)
431 struct bridge_softc *sc;
435 sc = kmalloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
436 ifp = sc->sc_ifp = &sc->sc_if;
438 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
439 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
440 sc->sc_bridge_max_age = BSTP_DEFAULT_MAX_AGE;
441 sc->sc_bridge_hello_time = BSTP_DEFAULT_HELLO_TIME;
442 sc->sc_bridge_forward_delay = BSTP_DEFAULT_FORWARD_DELAY;
443 sc->sc_bridge_priority = BSTP_DEFAULT_BRIDGE_PRIORITY;
444 sc->sc_hold_time = BSTP_DEFAULT_HOLD_TIME;
446 /* Initialize our routing table. */
447 bridge_rtable_init(sc);
449 callout_init(&sc->sc_brcallout);
450 netmsg_init(&sc->sc_brtimemsg, &netisr_adone_rport,
451 MSGF_DROPABLE | MSGF_PRIORITY, bridge_timer_handler);
452 sc->sc_brtimemsg.nm_lmsg.u.ms_resultp = sc;
454 callout_init(&sc->sc_bstpcallout);
455 netmsg_init(&sc->sc_bstptimemsg, &netisr_adone_rport,
456 MSGF_DROPABLE | MSGF_PRIORITY, bstp_tick_handler);
457 sc->sc_bstptimemsg.nm_lmsg.u.ms_resultp = sc;
459 LIST_INIT(&sc->sc_iflist);
460 LIST_INIT(&sc->sc_spanlist);
463 if_initname(ifp, ifc->ifc_name, unit);
464 ifp->if_mtu = ETHERMTU;
465 ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
466 ifp->if_ioctl = bridge_ioctl;
467 ifp->if_start = bridge_start;
468 ifp->if_init = bridge_init;
469 ifp->if_type = IFT_BRIDGE;
470 ifq_set_maxlen(&ifp->if_snd, ifqmaxlen);
471 ifp->if_snd.ifq_maxlen = ifqmaxlen;
472 ifq_set_ready(&ifp->if_snd);
473 ifp->if_hdrlen = ETHER_HDR_LEN;
476 * Generate a random ethernet address and use the private AC:DE:48
480 int rnd = karc4random();
481 bcopy(&rnd, &eaddr[0], 4); /* ETHER_ADDR_LEN == 6 */
483 bcopy(&rnd, &eaddr[2], 4); /* ETHER_ADDR_LEN == 6 */
485 eaddr[0] &= ~1; /* clear multicast bit */
486 eaddr[0] |= 2; /* set the LAA bit */
488 ether_ifattach(ifp, eaddr, NULL);
489 /* Now undo some of the damage... */
490 ifp->if_baudrate = 0;
491 ifp->if_type = IFT_BRIDGE;
493 crit_enter(); /* XXX MP */
494 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
501 bridge_delete_dispatch(struct netmsg *nmsg)
503 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
504 struct bridge_softc *sc = lmsg->u.ms_resultp;
505 struct ifnet *bifp = sc->sc_ifp;
506 struct bridge_iflist *bif;
508 lwkt_serialize_enter(bifp->if_serializer);
510 while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
511 bridge_delete_member(sc, bif, 0);
513 while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL)
514 bridge_delete_span(sc, bif);
516 lwkt_serialize_exit(bifp->if_serializer);
518 lwkt_replymsg(lmsg, 0);
522 * bridge_clone_destroy:
524 * Destroy a bridge instance.
527 bridge_clone_destroy(struct ifnet *ifp)
529 struct bridge_softc *sc = ifp->if_softc;
530 struct lwkt_msg *lmsg;
533 lwkt_serialize_enter(ifp->if_serializer);
536 ifp->if_flags &= ~IFF_UP;
538 lwkt_serialize_exit(ifp->if_serializer);
540 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_delete_dispatch);
541 lmsg = &nmsg.nm_lmsg;
542 lmsg->u.ms_resultp = sc;
543 lwkt_domsg(BRIDGE_CFGPORT, lmsg, 0);
545 crit_enter(); /* XXX MP */
546 LIST_REMOVE(sc, sc_list);
551 /* Tear down the routing table. */
552 bridge_rtable_fini(sc);
560 * Handle a control request from the operator.
563 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr)
565 struct bridge_softc *sc = ifp->if_softc;
567 struct ifbreq ifbreq;
568 struct ifbifconf ifbifconf;
569 struct ifbareq ifbareq;
570 struct ifbaconf ifbaconf;
571 struct ifbrparam ifbrparam;
573 struct ifdrv *ifd = (struct ifdrv *) data;
574 const struct bridge_control *bc;
577 ASSERT_SERIALIZED(ifp->if_serializer);
586 if (ifd->ifd_cmd >= bridge_control_table_size) {
590 bc = &bridge_control_table[ifd->ifd_cmd];
592 if (cmd == SIOCGDRVSPEC &&
593 (bc->bc_flags & BC_F_COPYOUT) == 0) {
596 } else if (cmd == SIOCSDRVSPEC &&
597 (bc->bc_flags & BC_F_COPYOUT) != 0) {
602 if (bc->bc_flags & BC_F_SUSER) {
603 error = suser_cred(cr, NULL_CRED_OKAY);
608 if (ifd->ifd_len != bc->bc_argsize ||
609 ifd->ifd_len > sizeof(args)) {
614 memset(&args, 0, sizeof(args));
615 if (bc->bc_flags & BC_F_COPYIN) {
616 error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
621 error = bridge_control(sc, cmd, bc->bc_func, &args);
625 if (bc->bc_flags & BC_F_COPYOUT)
626 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
630 if (!(ifp->if_flags & IFF_UP) &&
631 (ifp->if_flags & IFF_RUNNING)) {
633 * If interface is marked down and it is running,
637 } else if ((ifp->if_flags & IFF_UP) &&
638 !(ifp->if_flags & IFF_RUNNING)) {
640 * If interface is marked up and it is stopped, then
648 /* Do not allow the MTU to be changed on the bridge */
653 error = ether_ioctl(ifp, cmd, data);
662 * Clear or restore unwanted capabilities on the member interface
665 bridge_mutecaps(struct bridge_iflist *bif, int mute)
667 struct ifnet *ifp = bif->bif_ifp;
671 if (ifp->if_ioctl == NULL)
674 bzero(&ifr, sizeof(ifr));
675 ifr.ifr_reqcap = ifp->if_capenable;
678 /* mask off and save capabilities */
679 bif->bif_mutecap = ifr.ifr_reqcap & BRIDGE_IFCAPS_MASK;
680 if (bif->bif_mutecap != 0)
681 ifr.ifr_reqcap &= ~BRIDGE_IFCAPS_MASK;
683 /* restore muted capabilities */
684 ifr.ifr_reqcap |= bif->bif_mutecap;
687 if (bif->bif_mutecap != 0) {
688 lwkt_serialize_enter(ifp->if_serializer);
689 error = ifp->if_ioctl(ifp, SIOCSIFCAP, (caddr_t)&ifr, NULL);
690 lwkt_serialize_exit(ifp->if_serializer);
695 * bridge_lookup_member:
697 * Lookup a bridge member interface.
699 static struct bridge_iflist *
700 bridge_lookup_member(struct bridge_softc *sc, const char *name)
702 struct bridge_iflist *bif;
705 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
707 if (strcmp(ifp->if_xname, name) == 0)
715 * bridge_lookup_member_if:
717 * Lookup a bridge member interface by ifnet*.
719 static struct bridge_iflist *
720 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
722 struct bridge_iflist *bif;
724 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
725 if (bif->bif_ifp == member_ifp)
733 * bridge_delete_member:
735 * Delete the specified member interface.
738 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
741 struct ifnet *ifs = bif->bif_ifp;
742 struct ifnet *bifp = sc->sc_ifp;
744 ASSERT_SERIALIZED(bifp->if_serializer);
746 ifs->if_bridge = NULL;
749 * Release bridge interface's serializer:
750 * - To avoid possible dead lock.
751 * - netmsg_service_sync will block current thread.
753 lwkt_serialize_exit(bifp->if_serializer);
756 * Make sure that all protocol threads see 'ifs' if_bridge change.
758 netmsg_service_sync();
761 switch (ifs->if_type) {
765 * Take the interface out of promiscuous mode.
768 bridge_mutecaps(bif, 0);
775 panic("bridge_delete_member: impossible");
780 lwkt_serialize_enter(bifp->if_serializer);
782 LIST_REMOVE(bif, bif_next);
784 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
786 kfree(bif, M_DEVBUF);
788 if (sc->sc_ifp->if_flags & IFF_RUNNING)
789 bstp_initialization(sc);
793 * bridge_delete_span:
795 * Delete the specified span interface.
798 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
800 KASSERT(bif->bif_ifp->if_bridge == NULL,
801 ("%s: not a span interface", __func__));
803 LIST_REMOVE(bif, bif_next);
804 kfree(bif, M_DEVBUF);
808 bridge_ioctl_init(struct bridge_softc *sc, void *arg __unused)
810 struct ifnet *ifp = sc->sc_ifp;
812 if (ifp->if_flags & IFF_RUNNING)
815 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
818 ifp->if_flags |= IFF_RUNNING;
819 bstp_initialization(sc);
824 bridge_ioctl_stop(struct bridge_softc *sc, void *arg __unused)
826 struct ifnet *ifp = sc->sc_ifp;
827 struct lwkt_msg *lmsg;
829 if ((ifp->if_flags & IFF_RUNNING) == 0)
832 callout_stop(&sc->sc_brcallout);
835 lmsg = &sc->sc_brtimemsg.nm_lmsg;
836 if ((lmsg->ms_flags & MSGF_DONE) == 0) {
837 /* Pending to be processed; drop it */
844 ifp->if_flags &= ~IFF_RUNNING;
846 bridge_rtflush(sc, IFBF_FLUSHDYN);
851 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
853 struct ifbreq *req = arg;
854 struct bridge_iflist *bif = NULL;
855 struct ifnet *ifs, *bifp;
859 ASSERT_SERIALIZED(bifp->if_serializer);
861 ifs = ifunit(req->ifbr_ifsname);
865 /* If it's in the span list, it can't be a member. */
866 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
867 if (ifs == bif->bif_ifp)
870 /* Allow the first Ethernet member to define the MTU */
871 if (ifs->if_type != IFT_GIF) {
872 if (LIST_EMPTY(&sc->sc_iflist)) {
873 bifp->if_mtu = ifs->if_mtu;
874 } else if (bifp->if_mtu != ifs->if_mtu) {
875 if_printf(bifp, "invalid MTU for %s\n", ifs->if_xname);
880 if (ifs->if_bridge == sc)
883 if (ifs->if_bridge != NULL)
886 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK|M_ZERO);
888 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
889 bif->bif_priority = BSTP_DEFAULT_PORT_PRIORITY;
890 bif->bif_path_cost = BSTP_DEFAULT_PATH_COST;
892 switch (ifs->if_type) {
896 * Release bridge interface's serializer to
897 * avoid possible dead lock.
899 lwkt_serialize_exit(bifp->if_serializer);
902 * Place the interface into promiscuous mode.
904 error = ifpromisc(ifs, 1);
906 lwkt_serialize_enter(bifp->if_serializer);
910 bridge_mutecaps(bif, 1);
912 lwkt_serialize_enter(bifp->if_serializer);
915 case IFT_GIF: /* :^) */
923 LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
925 if (bifp->if_flags & IFF_RUNNING)
926 bstp_initialization(sc);
931 * Everything has been setup, so let the member interface
932 * deliver packets to this bridge on its input/output path.
938 kfree(bif, M_DEVBUF);
944 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
946 struct ifbreq *req = arg;
947 struct bridge_iflist *bif;
949 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
953 bridge_delete_member(sc, bif, 0);
959 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
961 struct ifbreq *req = arg;
962 struct bridge_iflist *bif;
964 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
968 req->ifbr_ifsflags = bif->bif_flags;
969 req->ifbr_state = bif->bif_state;
970 req->ifbr_priority = bif->bif_priority;
971 req->ifbr_path_cost = bif->bif_path_cost;
972 req->ifbr_portno = bif->bif_ifp->if_index & 0xff;
978 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
980 struct ifbreq *req = arg;
981 struct bridge_iflist *bif;
983 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
987 if (req->ifbr_ifsflags & IFBIF_SPAN)
988 /* SPAN is readonly */
991 if (req->ifbr_ifsflags & IFBIF_STP) {
992 switch (bif->bif_ifp->if_type) {
994 /* These can do spanning tree. */
998 /* Nothing else can. */
1003 bif->bif_flags = req->ifbr_ifsflags;
1005 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1006 bstp_initialization(sc);
1012 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1014 struct ifbrparam *param = arg;
1016 sc->sc_brtmax = param->ifbrp_csize;
1023 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1025 struct ifbrparam *param = arg;
1027 param->ifbrp_csize = sc->sc_brtmax;
1033 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1035 struct ifbifconf *bifc = arg;
1036 struct bridge_iflist *bif;
1038 int count, len, error = 0;
1041 LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
1043 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1046 if (bifc->ifbic_len == 0) {
1047 bifc->ifbic_len = sizeof(breq) * count;
1052 len = bifc->ifbic_len;
1053 memset(&breq, 0, sizeof breq);
1054 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1055 if (len < sizeof(breq))
1058 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1059 sizeof(breq.ifbr_ifsname));
1060 breq.ifbr_ifsflags = bif->bif_flags;
1061 breq.ifbr_state = bif->bif_state;
1062 breq.ifbr_priority = bif->bif_priority;
1063 breq.ifbr_path_cost = bif->bif_path_cost;
1064 breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
1065 error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
1069 len -= sizeof(breq);
1071 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1072 if (len < sizeof(breq))
1075 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1076 sizeof(breq.ifbr_ifsname));
1077 breq.ifbr_ifsflags = bif->bif_flags;
1078 breq.ifbr_state = bif->bif_state;
1079 breq.ifbr_priority = bif->bif_priority;
1080 breq.ifbr_path_cost = bif->bif_path_cost;
1081 breq.ifbr_portno = bif->bif_ifp->if_index & 0xff;
1082 error = copyout(&breq, bifc->ifbic_req + count, sizeof(breq));
1086 len -= sizeof(breq);
1089 bifc->ifbic_len = sizeof(breq) * count;
1094 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1096 struct ifbaconf *bac = arg;
1097 struct bridge_rtnode *brt;
1098 struct ifbareq bareq;
1099 int count = 0, error = 0, len;
1101 if (bac->ifbac_len == 0)
1104 len = bac->ifbac_len;
1105 memset(&bareq, 0, sizeof(bareq));
1106 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
1107 if (len < sizeof(bareq))
1109 strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
1110 sizeof(bareq.ifba_ifsname));
1111 memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1112 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1113 time_second < brt->brt_expire)
1114 bareq.ifba_expire = brt->brt_expire - time_second;
1116 bareq.ifba_expire = 0;
1117 bareq.ifba_flags = brt->brt_flags;
1119 error = copyout(&bareq, bac->ifbac_req + count, sizeof(bareq));
1123 len -= sizeof(bareq);
1126 bac->ifbac_len = sizeof(bareq) * count;
1131 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1133 struct ifbareq *req = arg;
1134 struct bridge_iflist *bif;
1137 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1141 error = bridge_rtupdate(sc, req->ifba_dst, bif->bif_ifp, 1,
1148 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1150 struct ifbrparam *param = arg;
1152 sc->sc_brttimeout = param->ifbrp_ctime;
1158 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1160 struct ifbrparam *param = arg;
1162 param->ifbrp_ctime = sc->sc_brttimeout;
1168 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1170 struct ifbareq *req = arg;
1172 return (bridge_rtdaddr(sc, req->ifba_dst));
1176 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1178 struct ifbreq *req = arg;
1180 bridge_rtflush(sc, req->ifbr_ifsflags);
1186 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1188 struct ifbrparam *param = arg;
1190 param->ifbrp_prio = sc->sc_bridge_priority;
1196 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1198 struct ifbrparam *param = arg;
1200 sc->sc_bridge_priority = param->ifbrp_prio;
1202 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1203 bstp_initialization(sc);
1209 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1211 struct ifbrparam *param = arg;
1213 param->ifbrp_hellotime = sc->sc_bridge_hello_time >> 8;
1219 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1221 struct ifbrparam *param = arg;
1223 if (param->ifbrp_hellotime == 0)
1225 sc->sc_bridge_hello_time = param->ifbrp_hellotime << 8;
1227 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1228 bstp_initialization(sc);
1234 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1236 struct ifbrparam *param = arg;
1238 param->ifbrp_fwddelay = sc->sc_bridge_forward_delay >> 8;
1244 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1246 struct ifbrparam *param = arg;
1248 if (param->ifbrp_fwddelay == 0)
1250 sc->sc_bridge_forward_delay = param->ifbrp_fwddelay << 8;
1252 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1253 bstp_initialization(sc);
1259 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1261 struct ifbrparam *param = arg;
1263 param->ifbrp_maxage = sc->sc_bridge_max_age >> 8;
1269 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1271 struct ifbrparam *param = arg;
1273 if (param->ifbrp_maxage == 0)
1275 sc->sc_bridge_max_age = param->ifbrp_maxage << 8;
1277 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1278 bstp_initialization(sc);
1284 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1286 struct ifbreq *req = arg;
1287 struct bridge_iflist *bif;
1289 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1293 bif->bif_priority = req->ifbr_priority;
1295 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1296 bstp_initialization(sc);
1302 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1304 struct ifbreq *req = arg;
1305 struct bridge_iflist *bif;
1307 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1311 bif->bif_path_cost = req->ifbr_path_cost;
1313 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1314 bstp_initialization(sc);
1320 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1322 struct ifbreq *req = arg;
1323 struct bridge_iflist *bif = NULL;
1326 ifs = ifunit(req->ifbr_ifsname);
1330 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1331 if (ifs == bif->bif_ifp)
1334 if (ifs->if_bridge != NULL)
1337 switch (ifs->if_type) {
1346 bif = kmalloc(sizeof(*bif), M_DEVBUF, M_WAITOK|M_ZERO);
1349 bif->bif_flags = IFBIF_SPAN;
1351 LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1357 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1359 struct ifbreq *req = arg;
1360 struct bridge_iflist *bif;
1363 ifs = ifunit(req->ifbr_ifsname);
1367 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1368 if (ifs == bif->bif_ifp)
1374 bridge_delete_span(sc, bif);
1380 bridge_ifdetach_dispatch(struct netmsg *nmsg)
1382 struct lwkt_msg *lmsg = &nmsg->nm_lmsg;
1383 struct ifnet *ifp, *bifp;
1384 struct bridge_softc *sc;
1385 struct bridge_iflist *bif;
1387 ifp = lmsg->u.ms_resultp;
1388 sc = ifp->if_bridge;
1390 /* Check if the interface is a bridge member */
1394 lwkt_serialize_enter(bifp->if_serializer);
1396 bif = bridge_lookup_member_if(sc, ifp);
1398 bridge_delete_member(sc, bif, 1);
1400 /* XXX Why bif will be NULL? */
1403 lwkt_serialize_exit(bifp->if_serializer);
1407 crit_enter(); /* XXX MP */
1409 /* Check if the interface is a span port */
1410 LIST_FOREACH(sc, &bridge_list, sc_list) {
1413 lwkt_serialize_enter(bifp->if_serializer);
1415 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1416 if (ifp == bif->bif_ifp) {
1417 bridge_delete_span(sc, bif);
1421 lwkt_serialize_exit(bifp->if_serializer);
1427 lwkt_replymsg(lmsg, 0);
1433 * Detach an interface from a bridge. Called when a member
1434 * interface is detaching.
1437 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1439 struct lwkt_msg *lmsg;
1442 netmsg_init(&nmsg, &curthread->td_msgport, 0, bridge_ifdetach_dispatch);
1443 lmsg = &nmsg.nm_lmsg;
1444 lmsg->u.ms_resultp = ifp;
1446 lwkt_domsg(BRIDGE_CFGPORT, lmsg, 0);
1452 * Initialize a bridge interface.
1455 bridge_init(void *xsc)
1457 bridge_control(xsc, SIOCSIFFLAGS, bridge_ioctl_init, NULL);
1463 * Stop the bridge interface.
1466 bridge_stop(struct ifnet *ifp)
1468 bridge_control(ifp->if_softc, SIOCSIFFLAGS, bridge_ioctl_stop, NULL);
1472 bridge_enqueue_internal(struct ifnet *dst_ifp, struct mbuf *m,
1473 netisr_fn_t handler)
1475 struct netmsg_packet *nmp;
1477 int cpu = mycpu->gd_cpuid;
1479 nmp = &m->m_hdr.mh_netmsg;
1480 netmsg_init(&nmp->nm_netmsg, &netisr_apanic_rport, 0, handler);
1482 nmp->nm_netmsg.nm_lmsg.u.ms_resultp = dst_ifp;
1484 port = cpu_portfn(cpu);
1485 lwkt_sendmsg(port, &nmp->nm_netmsg.nm_lmsg);
1489 bridge_pfil_enqueue(struct ifnet *dst_ifp, struct mbuf *m,
1492 netisr_fn_t handler;
1494 if (runfilt && (inet_pfil_hook.ph_hashooks > 0
1496 || inet6_pfil_hook.ph_hashooks > 0
1499 handler = bridge_pfil_enqueue_handler;
1501 handler = bridge_enqueue_handler;
1503 bridge_enqueue_internal(dst_ifp, m, handler);
1509 * Enqueue a packet on a bridge member interface.
1513 bridge_enqueue(struct ifnet *dst_ifp, struct mbuf *m)
1515 bridge_enqueue_internal(dst_ifp, m, bridge_enqueue_handler);
1521 * Send output from a bridge member interface. This
1522 * performs the bridging function for locally originated
1525 * The mbuf has the Ethernet header already attached. We must
1526 * enqueue or free the mbuf before returning.
1529 bridge_output(struct ifnet *ifp, struct mbuf *m)
1531 struct bridge_softc *sc = ifp->if_bridge;
1532 struct ether_header *eh;
1533 struct ifnet *dst_if;
1535 ASSERT_NOT_SERIALIZED(ifp->if_serializer);
1538 * Make sure that we are still a member of a bridge interface.
1545 if (m->m_len < ETHER_HDR_LEN) {
1546 m = m_pullup(m, ETHER_HDR_LEN);
1551 /* Serialize our bridge interface. */
1552 lwkt_serialize_enter(sc->sc_ifp->if_serializer);
1554 eh = mtod(m, struct ether_header *);
1557 * If bridge is down, but the original output interface is up,
1558 * go ahead and send out that interface. Otherwise, the packet
1561 if ((sc->sc_ifp->if_flags & IFF_RUNNING) == 0) {
1567 * If the packet is a multicast, or we don't know a better way to
1568 * get there, send to all interfaces.
1570 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1573 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1574 if (dst_if == NULL) {
1575 struct bridge_iflist *bif;
1581 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1582 dst_if = bif->bif_ifp;
1583 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1587 * If this is not the original output interface,
1588 * and the interface is participating in spanning
1589 * tree, make sure the port is in a state that
1590 * allows forwarding.
1592 if (dst_if != ifp &&
1593 (bif->bif_flags & IFBIF_STP) != 0) {
1594 switch (bif->bif_state) {
1595 case BSTP_IFSTATE_BLOCKING:
1596 case BSTP_IFSTATE_LISTENING:
1597 case BSTP_IFSTATE_DISABLED:
1602 if (LIST_NEXT(bif, bif_next) == NULL) {
1606 mc = m_copypacket(m, MB_DONTWAIT);
1608 sc->sc_ifp->if_oerrors++;
1612 bridge_enqueue(dst_if, mc);
1616 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
1622 * XXX Spanning tree consideration here?
1626 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
1627 if ((dst_if->if_flags & IFF_RUNNING) == 0)
1630 bridge_enqueue(dst_if, m);
1637 * Start output on a bridge.
1641 bridge_start(struct ifnet *ifp)
1643 struct bridge_softc *sc = ifp->if_softc;
1645 ASSERT_SERIALIZED(ifp->if_serializer);
1647 ifp->if_flags |= IFF_OACTIVE;
1649 struct ifnet *dst_if = NULL;
1650 struct ether_header *eh;
1653 m = ifq_dequeue(&ifp->if_snd, NULL);
1657 if (m->m_len < sizeof(*eh)) {
1658 m = m_pullup(m, sizeof(*eh));
1664 eh = mtod(m, struct ether_header *);
1669 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0)
1670 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1673 bridge_broadcast(sc, ifp, m, 0);
1675 bridge_enqueue(dst_if, m);
1677 ifp->if_flags &= ~IFF_OACTIVE;
1683 * The forwarding function of the bridge.
1686 bridge_forward(struct bridge_softc *sc, struct mbuf *m)
1688 struct bridge_iflist *bif;
1689 struct ifnet *src_if, *dst_if, *ifp;
1690 struct ether_header *eh;
1692 src_if = m->m_pkthdr.rcvif;
1695 ASSERT_SERIALIZED(ifp->if_serializer);
1698 ifp->if_ibytes += m->m_pkthdr.len;
1701 * Look up the bridge_iflist.
1703 bif = bridge_lookup_member_if(sc, src_if);
1705 /* Interface is not a bridge member (anymore?) */
1710 if (bif->bif_flags & IFBIF_STP) {
1711 switch (bif->bif_state) {
1712 case BSTP_IFSTATE_BLOCKING:
1713 case BSTP_IFSTATE_LISTENING:
1714 case BSTP_IFSTATE_DISABLED:
1720 eh = mtod(m, struct ether_header *);
1723 * If the interface is learning, and the source
1724 * address is valid and not multicast, record
1727 if ((bif->bif_flags & IFBIF_LEARNING) != 0 &&
1728 ETHER_IS_MULTICAST(eh->ether_shost) == 0 &&
1729 (eh->ether_shost[0] == 0 &&
1730 eh->ether_shost[1] == 0 &&
1731 eh->ether_shost[2] == 0 &&
1732 eh->ether_shost[3] == 0 &&
1733 eh->ether_shost[4] == 0 &&
1734 eh->ether_shost[5] == 0) == 0) {
1735 bridge_rtupdate(sc, eh->ether_shost, src_if, 0, IFBAF_DYNAMIC);
1738 if ((bif->bif_flags & IFBIF_STP) != 0 &&
1739 bif->bif_state == BSTP_IFSTATE_LEARNING) {
1745 * At this point, the port either doesn't participate
1746 * in spanning tree or it is in the forwarding state.
1750 * If the packet is unicast, destined for someone on
1751 * "this" side of the bridge, drop it.
1753 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
1754 dst_if = bridge_rtlookup(sc, eh->ether_dhost);
1755 if (src_if == dst_if) {
1760 /* ...forward it to all interfaces. */
1761 sc->sc_ifp->if_imcasts++;
1765 if (dst_if == NULL) {
1766 bridge_broadcast(sc, src_if, m, 1);
1771 * At this point, we're dealing with a unicast frame
1772 * going to a different interface.
1774 if ((dst_if->if_flags & IFF_RUNNING) == 0) {
1778 bif = bridge_lookup_member_if(sc, dst_if);
1780 /* Not a member of the bridge (anymore?) */
1785 if (bif->bif_flags & IFBIF_STP) {
1786 switch (bif->bif_state) {
1787 case BSTP_IFSTATE_DISABLED:
1788 case BSTP_IFSTATE_BLOCKING:
1794 lwkt_serialize_exit(ifp->if_serializer);
1796 /* run the packet filter */
1797 if (inet_pfil_hook.ph_hashooks > 0
1799 || inet6_pfil_hook.ph_hashooks > 0
1802 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
1807 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
1812 bridge_handoff(dst_if, m);
1815 * ifp's serializer was held on entry and is expected to be held
1819 lwkt_serialize_enter(ifp->if_serializer);
1825 * Receive input from a member interface. Queue the packet for
1826 * bridging if it is not for us.
1828 static struct mbuf *
1829 bridge_input(struct ifnet *ifp, struct mbuf *m)
1831 struct bridge_softc *sc = ifp->if_bridge;
1832 struct bridge_iflist *bif;
1833 struct ifnet *bifp, *new_ifp;
1834 struct ether_header *eh;
1835 struct mbuf *mc, *mc2;
1838 * Make sure that we are still a member of a bridge interface.
1846 lwkt_serialize_enter(bifp->if_serializer);
1848 if ((bifp->if_flags & IFF_RUNNING) == 0)
1852 * Implement support for bridge monitoring. If this flag has been
1853 * set on this interface, discard the packet once we push it through
1854 * the bpf(4) machinery, but before we do, increment the byte and
1855 * packet counters associated with this interface.
1857 if ((bifp->if_flags & IFF_MONITOR) != 0) {
1858 m->m_pkthdr.rcvif = bifp;
1860 bifp->if_ipackets++;
1861 bifp->if_ibytes += m->m_pkthdr.len;
1867 eh = mtod(m, struct ether_header *);
1869 m->m_flags &= ~M_PROTO1; /* XXX Hack - loop prevention */
1871 if (memcmp(eh->ether_dhost, IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
1873 * If the packet is for us, set the packets source as the
1874 * bridge, and return the packet back to ifnet.if_input for
1877 KASSERT(bifp->if_bridge == NULL,
1878 ("loop created in bridge_input"));
1884 * Tap all packets arriving on the bridge, no matter if
1885 * they are local destinations or not. In is in.
1889 bif = bridge_lookup_member_if(sc, ifp);
1895 if (m->m_flags & (M_BCAST | M_MCAST)) {
1896 /* Tap off 802.1D packets; they do not get forwarded. */
1897 if (memcmp(eh->ether_dhost, bstp_etheraddr,
1898 ETHER_ADDR_LEN) == 0) {
1899 m = bstp_input(sc, bif, m);
1901 ("attempt to deliver 802.1D packet\n"));
1905 if (bif->bif_flags & IFBIF_STP) {
1906 switch (bif->bif_state) {
1907 case BSTP_IFSTATE_BLOCKING:
1908 case BSTP_IFSTATE_LISTENING:
1909 case BSTP_IFSTATE_DISABLED:
1915 * Make a deep copy of the packet and enqueue the copy
1916 * for bridge processing; return the original packet for
1919 mc = m_dup(m, MB_DONTWAIT);
1923 bridge_forward(sc, mc);
1926 * Reinject the mbuf as arriving on the bridge so we have a
1927 * chance at claiming multicast packets. We can not loop back
1928 * here from ether_input as a bridge is never a member of a
1931 KASSERT(bifp->if_bridge == NULL,
1932 ("loop created in bridge_input"));
1933 mc2 = m_dup(m, MB_DONTWAIT);
1936 /* Keep the layer3 header aligned */
1937 int i = min(mc2->m_pkthdr.len, max_protohdr);
1938 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
1942 mc2->m_pkthdr.rcvif = bifp;
1943 bifp->if_ipackets++;
1944 bifp->if_input(bifp, mc2);
1947 /* Return the original packet for local processing. */
1951 if (bif->bif_flags & IFBIF_STP) {
1952 switch (bif->bif_state) {
1953 case BSTP_IFSTATE_BLOCKING:
1954 case BSTP_IFSTATE_LISTENING:
1955 case BSTP_IFSTATE_DISABLED:
1961 * Unicast. Make sure it's not for us.
1963 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1964 if (bif->bif_ifp->if_type != IFT_ETHER)
1967 /* It is destined for us. */
1968 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_dhost,
1969 ETHER_ADDR_LEN) == 0) {
1970 if (bif->bif_flags & IFBIF_LEARNING) {
1972 eh->ether_shost, ifp, 0, IFBAF_DYNAMIC);
1975 if (bif->bif_ifp != ifp) {
1976 /* XXX loop prevention */
1977 m->m_flags |= M_PROTO1;
1978 new_ifp = bif->bif_ifp;
1983 /* We just received a packet that we sent out. */
1984 if (memcmp(IF_LLADDR(bif->bif_ifp), eh->ether_shost,
1985 ETHER_ADDR_LEN) == 0) {
1992 /* Perform the bridge forwarding function. */
1993 bridge_forward(sc, m);
1996 lwkt_serialize_exit(bifp->if_serializer);
1998 if (new_ifp != NULL) {
1999 lwkt_serialize_enter(new_ifp->if_serializer);
2001 m->m_pkthdr.rcvif = new_ifp;
2002 new_ifp->if_ipackets++;
2003 new_ifp->if_input(new_ifp, m);
2006 lwkt_serialize_exit(new_ifp->if_serializer);
2014 * Send a frame to all interfaces that are members of
2015 * the bridge, except for the one on which the packet
2019 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
2020 struct mbuf *m, int runfilt)
2022 struct bridge_iflist *bif;
2024 struct ifnet *dst_if, *bifp;
2029 ASSERT_SERIALIZED(bifp->if_serializer);
2031 /* run the packet filter */
2032 if (runfilt && (inet_pfil_hook.ph_hashooks > 0
2034 || inet6_pfil_hook.ph_hashooks > 0
2037 lwkt_serialize_exit(bifp->if_serializer);
2039 /* Filter on the bridge interface before broadcasting */
2041 if (bridge_pfil(&m, bifp, src_if, PFIL_IN) != 0)
2046 if (bridge_pfil(&m, bifp, NULL, PFIL_OUT) != 0)
2049 lwkt_serialize_enter(bifp->if_serializer);
2054 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
2055 dst_if = bif->bif_ifp;
2056 if (dst_if == src_if)
2059 if (bif->bif_flags & IFBIF_STP) {
2060 switch (bif->bif_state) {
2061 case BSTP_IFSTATE_BLOCKING:
2062 case BSTP_IFSTATE_DISABLED:
2067 if ((bif->bif_flags & IFBIF_DISCOVER) == 0 &&
2068 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2071 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2074 if (LIST_NEXT(bif, bif_next) == NULL) {
2078 mc = m_copypacket(m, MB_DONTWAIT);
2080 sc->sc_ifp->if_oerrors++;
2084 bridge_pfil_enqueue(dst_if, mc, runfilt);
2093 * Duplicate a packet out one or more interfaces that are in span mode,
2094 * the original mbuf is unmodified.
2097 bridge_span(struct bridge_softc *sc, struct mbuf *m)
2099 struct bridge_iflist *bif;
2100 struct ifnet *dst_if;
2103 if (LIST_EMPTY(&sc->sc_spanlist))
2106 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2107 dst_if = bif->bif_ifp;
2109 if ((dst_if->if_flags & IFF_RUNNING) == 0)
2112 mc = m_copypacket(m, MB_DONTWAIT);
2114 sc->sc_ifp->if_oerrors++;
2118 bridge_enqueue(dst_if, mc);
2125 * Add a bridge routing entry.
2128 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst,
2129 struct ifnet *dst_if, int setflags, uint8_t flags)
2131 struct bridge_rtnode *brt;
2135 * A route for this destination might already exist. If so,
2136 * update it, otherwise create a new one.
2138 if ((brt = bridge_rtnode_lookup(sc, dst)) == NULL) {
2139 if (sc->sc_brtcnt >= sc->sc_brtmax)
2143 * Allocate a new bridge forwarding node, and
2144 * initialize the expiration time and Ethernet
2147 brt = kmalloc(sizeof(struct bridge_rtnode), M_DEVBUF,
2150 brt->brt_flags = IFBAF_DYNAMIC;
2151 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2153 if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
2154 kfree(brt, M_DEVBUF);
2159 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2160 brt->brt_ifp = dst_if;
2161 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2162 brt->brt_expire = time_second + sc->sc_brttimeout;
2164 brt->brt_flags = flags;
2172 * Lookup the destination interface for an address.
2174 static struct ifnet *
2175 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr)
2177 struct bridge_rtnode *brt;
2179 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2182 return (brt->brt_ifp);
2188 * Trim the routine table so that we have a number
2189 * of routing entries less than or equal to the
2193 bridge_rttrim(struct bridge_softc *sc)
2195 struct bridge_rtnode *brt, *nbrt;
2197 /* Make sure we actually need to do this. */
2198 if (sc->sc_brtcnt <= sc->sc_brtmax)
2201 /* Force an aging cycle; this might trim enough addresses. */
2203 if (sc->sc_brtcnt <= sc->sc_brtmax)
2206 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2207 nbrt = LIST_NEXT(brt, brt_list);
2208 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2209 bridge_rtnode_destroy(sc, brt);
2210 if (sc->sc_brtcnt <= sc->sc_brtmax)
2219 * Aging timer for the bridge.
2222 bridge_timer(void *arg)
2224 struct bridge_softc *sc = arg;
2225 struct lwkt_msg *lmsg;
2227 KKASSERT(mycpuid == BRIDGE_CFGCPU);
2231 if (callout_pending(&sc->sc_brcallout) ||
2232 !callout_active(&sc->sc_brcallout)) {
2236 callout_deactivate(&sc->sc_brcallout);
2238 lmsg = &sc->sc_brtimemsg.nm_lmsg;
2239 KKASSERT(lmsg->ms_flags & MSGF_DONE);
2240 lwkt_sendmsg(BRIDGE_CFGPORT, lmsg);
2246 bridge_timer_handler(struct netmsg *nmsg)
2248 struct bridge_softc *sc = nmsg->nm_lmsg.u.ms_resultp;
2250 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
2254 lwkt_replymsg(&nmsg->nm_lmsg, 0);
2257 lwkt_serialize_enter(sc->sc_ifp->if_serializer);
2261 if (sc->sc_ifp->if_flags & IFF_RUNNING) {
2262 callout_reset(&sc->sc_brcallout,
2263 bridge_rtable_prune_period * hz, bridge_timer, sc);
2266 lwkt_serialize_exit(sc->sc_ifp->if_serializer);
2272 * Perform an aging cycle.
2275 bridge_rtage(struct bridge_softc *sc)
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_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2282 if (time_second >= brt->brt_expire)
2283 bridge_rtnode_destroy(sc, brt);
2291 * Remove all dynamic addresses from the bridge.
2294 bridge_rtflush(struct bridge_softc *sc, int full)
2296 struct bridge_rtnode *brt, *nbrt;
2298 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2299 nbrt = LIST_NEXT(brt, brt_list);
2300 if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2301 bridge_rtnode_destroy(sc, brt);
2308 * Remove an address from the table.
2311 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr)
2313 struct bridge_rtnode *brt;
2315 if ((brt = bridge_rtnode_lookup(sc, addr)) == NULL)
2318 bridge_rtnode_destroy(sc, brt);
2325 * Delete routes to a speicifc member interface.
2328 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
2330 struct bridge_rtnode *brt, *nbrt;
2332 for (brt = LIST_FIRST(&sc->sc_rtlist); brt != NULL; brt = nbrt) {
2333 nbrt = LIST_NEXT(brt, brt_list);
2334 if (brt->brt_ifp == ifp && (full ||
2335 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
2336 bridge_rtnode_destroy(sc, brt);
2341 * bridge_rtable_init:
2343 * Initialize the route table for this bridge.
2346 bridge_rtable_init(struct bridge_softc *sc)
2350 sc->sc_rthash = kmalloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
2351 M_DEVBUF, M_WAITOK);
2353 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
2354 LIST_INIT(&sc->sc_rthash[i]);
2356 sc->sc_rthash_key = karc4random();
2358 LIST_INIT(&sc->sc_rtlist);
2364 * bridge_rtable_fini:
2366 * Deconstruct the route table for this bridge.
2369 bridge_rtable_fini(struct bridge_softc *sc)
2372 kfree(sc->sc_rthash, M_DEVBUF);
2376 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2377 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2379 #define mix(a, b, c) \
2381 a -= b; a -= c; a ^= (c >> 13); \
2382 b -= c; b -= a; b ^= (a << 8); \
2383 c -= a; c -= b; c ^= (b >> 13); \
2384 a -= b; a -= c; a ^= (c >> 12); \
2385 b -= c; b -= a; b ^= (a << 16); \
2386 c -= a; c -= b; c ^= (b >> 5); \
2387 a -= b; a -= c; a ^= (c >> 3); \
2388 b -= c; b -= a; b ^= (a << 10); \
2389 c -= a; c -= b; c ^= (b >> 15); \
2390 } while (/*CONSTCOND*/0)
2392 static __inline uint32_t
2393 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
2395 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
2406 return (c & BRIDGE_RTHASH_MASK);
2412 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
2416 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
2417 d = ((int)a[i]) - ((int)b[i]);
2424 * bridge_rtnode_lookup:
2426 * Look up a bridge route node for the specified destination.
2428 static struct bridge_rtnode *
2429 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr)
2431 struct bridge_rtnode *brt;
2435 hash = bridge_rthash(sc, addr);
2436 LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
2437 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
2448 * bridge_rtnode_insert:
2450 * Insert the specified bridge node into the route table. We
2451 * assume the entry is not already in the table.
2454 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
2456 struct bridge_rtnode *lbrt;
2460 hash = bridge_rthash(sc, brt->brt_addr);
2462 lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
2464 LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
2469 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
2473 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
2476 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
2477 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
2480 lbrt = LIST_NEXT(lbrt, brt_hash);
2481 } while (lbrt != NULL);
2484 panic("bridge_rtnode_insert: impossible");
2488 LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
2495 * bridge_rtnode_destroy:
2497 * Destroy a bridge rtnode.
2500 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
2503 LIST_REMOVE(brt, brt_hash);
2505 LIST_REMOVE(brt, brt_list);
2507 kfree(brt, M_DEVBUF);
2511 bridge_post_pfil(struct mbuf *m)
2513 if (m->m_pkthdr.fw_flags & IPFORWARD_MBUF_TAGGED)
2517 if (m->m_pkthdr.fw_flags & DUMMYNET_MBUF_TAGGED)
2524 * Send bridge packets through pfil if they are one of the types pfil can deal
2525 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
2526 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
2530 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
2532 int snap, error, i, hlen;
2533 struct ether_header *eh1, eh2;
2536 u_int16_t ether_type;
2539 error = -1; /* Default error if not error == 0 */
2541 if (pfil_bridge == 0 && pfil_member == 0)
2542 return (0); /* filtering is disabled */
2544 i = min((*mp)->m_pkthdr.len, max_protohdr);
2545 if ((*mp)->m_len < i) {
2546 *mp = m_pullup(*mp, i);
2548 kprintf("%s: m_pullup failed\n", __func__);
2553 eh1 = mtod(*mp, struct ether_header *);
2554 ether_type = ntohs(eh1->ether_type);
2557 * Check for SNAP/LLC.
2559 if (ether_type < ETHERMTU) {
2560 struct llc *llc2 = (struct llc *)(eh1 + 1);
2562 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
2563 llc2->llc_dsap == LLC_SNAP_LSAP &&
2564 llc2->llc_ssap == LLC_SNAP_LSAP &&
2565 llc2->llc_control == LLC_UI) {
2566 ether_type = htons(llc2->llc_un.type_snap.ether_type);
2572 * If we're trying to filter bridge traffic, don't look at anything
2573 * other than IP and ARP traffic. If the filter doesn't understand
2574 * IPv6, don't allow IPv6 through the bridge either. This is lame
2575 * since if we really wanted, say, an AppleTalk filter, we are hosed,
2576 * but of course we don't have an AppleTalk filter to begin with.
2577 * (Note that since pfil doesn't understand ARP it will pass *ALL*
2580 switch (ether_type) {
2582 case ETHERTYPE_REVARP:
2583 return (0); /* Automatically pass */
2586 case ETHERTYPE_IPV6:
2591 * Check to see if the user wants to pass non-ip
2592 * packets, these will not be checked by pfil(9) and
2593 * passed unconditionally so the default is to drop.
2599 /* Strip off the Ethernet header and keep a copy. */
2600 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
2601 m_adj(*mp, ETHER_HDR_LEN);
2603 /* Strip off snap header, if present */
2605 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
2606 m_adj(*mp, sizeof(struct llc));
2610 * Check the IP header for alignment and errors
2612 if (dir == PFIL_IN) {
2613 switch (ether_type) {
2615 error = bridge_ip_checkbasic(mp);
2618 case ETHERTYPE_IPV6:
2619 error = bridge_ip6_checkbasic(mp);
2632 * Run the packet through pfil
2638 * before calling the firewall, swap fields the same as
2639 * IP does. here we assume the header is contiguous
2641 ip = mtod(*mp, struct ip *);
2643 ip->ip_len = ntohs(ip->ip_len);
2644 ip->ip_off = ntohs(ip->ip_off);
2647 * Run pfil on the member interface and the bridge, both can
2648 * be skipped by clearing pfil_member or pfil_bridge.
2651 * in_if -> bridge_if -> out_if
2653 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL) {
2654 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
2655 if (*mp == NULL || error != 0) /* filter may consume */
2657 error = bridge_post_pfil(*mp);
2662 if (pfil_member && ifp != NULL) {
2663 error = pfil_run_hooks(&inet_pfil_hook, mp, ifp, dir);
2664 if (*mp == NULL || error != 0) /* filter may consume */
2666 error = bridge_post_pfil(*mp);
2671 if (pfil_bridge && dir == PFIL_IN && bifp != NULL) {
2672 error = pfil_run_hooks(&inet_pfil_hook, mp, bifp, dir);
2673 if (*mp == NULL || error != 0) /* filter may consume */
2675 error = bridge_post_pfil(*mp);
2680 /* check if we need to fragment the packet */
2681 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
2682 i = (*mp)->m_pkthdr.len;
2683 if (i > ifp->if_mtu) {
2684 error = bridge_fragment(ifp, *mp, &eh2, snap,
2690 /* Recalculate the ip checksum and restore byte ordering */
2691 ip = mtod(*mp, struct ip *);
2692 hlen = ip->ip_hl << 2;
2693 if (hlen < sizeof(struct ip))
2695 if (hlen > (*mp)->m_len) {
2696 if ((*mp = m_pullup(*mp, hlen)) == 0)
2698 ip = mtod(*mp, struct ip *);
2702 ip->ip_len = htons(ip->ip_len);
2703 ip->ip_off = htons(ip->ip_off);
2705 if (hlen == sizeof(struct ip))
2706 ip->ip_sum = in_cksum_hdr(ip);
2708 ip->ip_sum = in_cksum(*mp, hlen);
2712 case ETHERTYPE_IPV6 :
2713 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
2714 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
2717 if (*mp == NULL || error != 0) /* filter may consume */
2720 if (pfil_member && ifp != NULL)
2721 error = pfil_run_hooks(&inet6_pfil_hook, mp, ifp,
2724 if (*mp == NULL || error != 0) /* filter may consume */
2727 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
2728 error = pfil_run_hooks(&inet6_pfil_hook, mp, bifp,
2745 * Finally, put everything back the way it was and return
2748 M_PREPEND(*mp, sizeof(struct llc), MB_DONTWAIT);
2751 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
2754 M_PREPEND(*mp, ETHER_HDR_LEN, MB_DONTWAIT);
2757 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
2768 * Perform basic checks on header size since
2769 * pfil assumes ip_input has already processed
2770 * it for it. Cut-and-pasted from ip_input.c.
2771 * Given how simple the IPv6 version is,
2772 * does the IPv4 version really need to be
2775 * XXX Should we update ipstat here, or not?
2776 * XXX Right now we update ipstat but not
2780 bridge_ip_checkbasic(struct mbuf **mp)
2782 struct mbuf *m = *mp;
2790 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
2791 if ((m = m_copyup(m, sizeof(struct ip),
2792 (max_linkhdr + 3) & ~3)) == NULL) {
2793 /* XXXJRT new stat, please */
2794 ipstat.ips_toosmall++;
2799 #ifndef __predict_false
2800 #define __predict_false(x) x
2802 if (__predict_false(m->m_len < sizeof (struct ip))) {
2803 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
2804 ipstat.ips_toosmall++;
2808 ip = mtod(m, struct ip *);
2809 if (ip == NULL) goto bad;
2811 if (ip->ip_v != IPVERSION) {
2812 ipstat.ips_badvers++;
2815 hlen = ip->ip_hl << 2;
2816 if (hlen < sizeof(struct ip)) { /* minimum header length */
2817 ipstat.ips_badhlen++;
2820 if (hlen > m->m_len) {
2821 if ((m = m_pullup(m, hlen)) == 0) {
2822 ipstat.ips_badhlen++;
2825 ip = mtod(m, struct ip *);
2826 if (ip == NULL) goto bad;
2829 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
2830 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
2832 if (hlen == sizeof(struct ip)) {
2833 sum = in_cksum_hdr(ip);
2835 sum = in_cksum(m, hlen);
2839 ipstat.ips_badsum++;
2843 /* Retrieve the packet length. */
2844 len = ntohs(ip->ip_len);
2847 * Check for additional length bogosity
2850 ipstat.ips_badlen++;
2855 * Check that the amount of data in the buffers
2856 * is as at least much as the IP header would have us expect.
2857 * Drop packet if shorter than we expect.
2859 if (m->m_pkthdr.len < len) {
2860 ipstat.ips_tooshort++;
2864 /* Checks out, proceed */
2875 * Same as above, but for IPv6.
2876 * Cut-and-pasted from ip6_input.c.
2877 * XXX Should we update ip6stat, or not?
2880 bridge_ip6_checkbasic(struct mbuf **mp)
2882 struct mbuf *m = *mp;
2883 struct ip6_hdr *ip6;
2886 * If the IPv6 header is not aligned, slurp it up into a new
2887 * mbuf with space for link headers, in the event we forward
2888 * it. Otherwise, if it is aligned, make sure the entire base
2889 * IPv6 header is in the first mbuf of the chain.
2892 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
2893 struct ifnet *inifp = m->m_pkthdr.rcvif;
2894 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
2895 (max_linkhdr + 3) & ~3)) == NULL) {
2896 /* XXXJRT new stat, please */
2897 ip6stat.ip6s_toosmall++;
2898 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2903 if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
2904 struct ifnet *inifp = m->m_pkthdr.rcvif;
2905 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
2906 ip6stat.ip6s_toosmall++;
2907 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
2912 ip6 = mtod(m, struct ip6_hdr *);
2914 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
2915 ip6stat.ip6s_badvers++;
2916 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
2920 /* Checks out, proceed */
2933 * Return a fragmented mbuf chain.
2936 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
2937 int snap, struct llc *llc)
2943 if (m->m_len < sizeof(struct ip) &&
2944 (m = m_pullup(m, sizeof(struct ip))) == NULL)
2946 ip = mtod(m, struct ip *);
2948 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
2953 /* walk the chain and re-add the Ethernet header */
2954 for (m0 = m; m0; m0 = m0->m_nextpkt) {
2957 M_PREPEND(m0, sizeof(struct llc), MB_DONTWAIT);
2962 bcopy(llc, mtod(m0, caddr_t),
2963 sizeof(struct llc));
2965 M_PREPEND(m0, ETHER_HDR_LEN, MB_DONTWAIT);
2970 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
2976 ipstat.ips_fragmented++;
2987 bridge_enqueue_handler(struct netmsg *nmsg)
2989 struct netmsg_packet *nmp;
2990 struct ifnet *dst_ifp;
2993 nmp = (struct netmsg_packet *)nmsg;
2995 dst_ifp = nmp->nm_netmsg.nm_lmsg.u.ms_resultp;
2997 bridge_handoff(dst_ifp, m);
3001 bridge_pfil_enqueue_handler(struct netmsg *nmsg)
3003 struct netmsg_packet *nmp;
3004 struct ifnet *dst_ifp;
3007 nmp = (struct netmsg_packet *)nmsg;
3009 dst_ifp = nmp->nm_netmsg.nm_lmsg.u.ms_resultp;
3012 * Filter on the output interface. Pass a NULL bridge interface
3013 * pointer so we do not redundantly filter on the bridge for
3014 * each interface we broadcast on.
3016 if (inet_pfil_hook.ph_hashooks > 0
3018 || inet6_pfil_hook.ph_hashooks > 0
3021 if (bridge_pfil(&m, NULL, dst_ifp, PFIL_OUT) != 0)
3026 bridge_handoff(dst_ifp, m);
3030 bridge_handoff(struct ifnet *dst_ifp, struct mbuf *m)
3034 lwkt_serialize_enter(dst_ifp->if_serializer);
3036 /* We may be sending a fragment so traverse the mbuf */
3038 struct altq_pktattr pktattr;
3041 m->m_nextpkt = NULL;
3043 if (ifq_is_enabled(&dst_ifp->if_snd))
3044 altq_etherclassify(&dst_ifp->if_snd, m, &pktattr);
3046 ifq_handoff(dst_ifp, m, &pktattr);
3049 lwkt_serialize_exit(dst_ifp->if_serializer);
3052 struct netmsg_brgctl {
3053 struct netmsg bc_nmsg;
3054 bridge_ctl_t bc_func;
3055 struct bridge_softc *bc_sc;
3060 bridge_control_dispatch(struct netmsg *nmsg)
3062 struct netmsg_brgctl *bc_msg = (struct netmsg_brgctl *)nmsg;
3063 struct ifnet *bifp = bc_msg->bc_sc->sc_ifp;
3066 lwkt_serialize_enter(bifp->if_serializer);
3067 error = bc_msg->bc_func(bc_msg->bc_sc, bc_msg->bc_arg);
3068 lwkt_serialize_exit(bifp->if_serializer);
3070 lwkt_replymsg(&nmsg->nm_lmsg, error);
3074 bridge_control(struct bridge_softc *sc, u_long cmd,
3075 bridge_ctl_t bc_func, void *bc_arg)
3077 struct ifnet *bifp = sc->sc_ifp;
3078 struct netmsg_brgctl bc_msg;
3079 struct netmsg *nmsg;
3082 ASSERT_SERIALIZED(bifp->if_serializer);
3084 if (cmd == SIOCGDRVSPEC) {
3086 * Don't dispatch 'get' ioctl to netisr0;
3087 * there are copyouts down deep inside
3088 * specific bridge ioctl functions.
3090 return bc_func(sc, bc_arg);
3093 bzero(&bc_msg, sizeof(bc_msg));
3094 nmsg = &bc_msg.bc_nmsg;
3096 netmsg_init(nmsg, &curthread->td_msgport, 0, bridge_control_dispatch);
3097 bc_msg.bc_func = bc_func;
3099 bc_msg.bc_arg = bc_arg;
3101 lwkt_serialize_exit(bifp->if_serializer);
3102 error = lwkt_domsg(BRIDGE_CFGPORT, &nmsg->nm_lmsg, 0);
3103 lwkt_serialize_enter(bifp->if_serializer);