1 /* $NetBSD: if_bridge.c,v 1.31 2005/06/01 19:45:34 jdc Exp $ */
4 * Copyright 2001 Wasabi Systems, Inc.
7 * Written by Jason R. Thorpe for Wasabi Systems, Inc.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed for the NetBSD Project by
20 * Wasabi Systems, Inc.
21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse
22 * or promote products derived from this software without specific prior
25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
35 * POSSIBILITY OF SUCH DAMAGE.
39 * Copyright (c) 1999, 2000 Jason L. Wright (jason@thought.net)
40 * All rights reserved.
42 * Redistribution and use in source and binary forms, with or without
43 * modification, are permitted provided that the following conditions
45 * 1. Redistributions of source code must retain the above copyright
46 * notice, this list of conditions and the following disclaimer.
47 * 2. Redistributions in binary form must reproduce the above copyright
48 * notice, this list of conditions and the following disclaimer in the
49 * documentation and/or other materials provided with the distribution.
51 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
52 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
53 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
54 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
55 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
56 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
57 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
58 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
59 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
60 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
61 * POSSIBILITY OF SUCH DAMAGE.
63 * OpenBSD: if_bridge.c,v 1.60 2001/06/15 03:38:33 itojun Exp
67 * Network interface bridge support.
71 * - Currently only supports Ethernet-like interfaces (Ethernet,
72 * 802.11, VLANs on Ethernet, etc.) Figure out a nice way
73 * to bridge other types of interfaces (FDDI-FDDI, and maybe
74 * consider heterogenous bridges).
77 #include <sys/cdefs.h>
78 __FBSDID("$FreeBSD$");
81 #include "opt_inet6.h"
83 #include <sys/param.h>
85 #include <sys/malloc.h>
86 #include <sys/protosw.h>
87 #include <sys/systm.h>
90 #include <sys/socket.h> /* for net/if.h */
91 #include <sys/sockio.h>
92 #include <sys/ctype.h> /* string functions */
93 #include <sys/kernel.h>
94 #include <sys/random.h>
95 #include <sys/syslog.h>
96 #include <sys/sysctl.h>
98 #include <sys/module.h>
100 #include <sys/proc.h>
101 #include <sys/lock.h>
102 #include <sys/mutex.h>
106 #include <net/if_clone.h>
107 #include <net/if_dl.h>
108 #include <net/if_types.h>
109 #include <net/if_var.h>
110 #include <net/pfil.h>
111 #include <net/vnet.h>
113 #include <netinet/in.h> /* for struct arpcom */
114 #include <netinet/in_systm.h>
115 #include <netinet/in_var.h>
116 #include <netinet/ip.h>
117 #include <netinet/ip_var.h>
119 #include <netinet/ip6.h>
120 #include <netinet6/ip6_var.h>
122 #if defined(INET) || defined(INET6)
123 #include <netinet/ip_carp.h>
125 #include <machine/in_cksum.h>
126 #include <netinet/if_ether.h> /* for struct arpcom */
127 #include <net/bridgestp.h>
128 #include <net/if_bridgevar.h>
129 #include <net/if_llc.h>
130 #include <net/if_vlan_var.h>
132 #include <net/route.h>
135 * Size of the route hash table. Must be a power of two.
137 #ifndef BRIDGE_RTHASH_SIZE
138 #define BRIDGE_RTHASH_SIZE 1024
141 #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
144 * Default maximum number of addresses to cache.
146 #ifndef BRIDGE_RTABLE_MAX
147 #define BRIDGE_RTABLE_MAX 2000
151 * Timeout (in seconds) for entries learned dynamically.
153 #ifndef BRIDGE_RTABLE_TIMEOUT
154 #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
158 * Number of seconds between walks of the route list.
160 #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
161 #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
165 * List of capabilities to possibly mask on the member interface.
167 #define BRIDGE_IFCAPS_MASK (IFCAP_TOE|IFCAP_TSO|IFCAP_TXCSUM)
170 * List of capabilities to strip
172 #define BRIDGE_IFCAPS_STRIP IFCAP_LRO
175 * Bridge interface list entry.
177 struct bridge_iflist {
178 LIST_ENTRY(bridge_iflist) bif_next;
179 struct ifnet *bif_ifp; /* member if */
180 struct bstp_port bif_stp; /* STP state */
181 uint32_t bif_flags; /* member if flags */
182 int bif_savedcaps; /* saved capabilities */
183 uint32_t bif_addrmax; /* max # of addresses */
184 uint32_t bif_addrcnt; /* cur. # of addresses */
185 uint32_t bif_addrexceeded;/* # of address violations */
191 struct bridge_rtnode {
192 LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
193 LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
194 struct bridge_iflist *brt_dst; /* destination if */
195 unsigned long brt_expire; /* expiration time */
196 uint8_t brt_flags; /* address flags */
197 uint8_t brt_addr[ETHER_ADDR_LEN];
198 uint16_t brt_vlan; /* vlan id */
200 #define brt_ifp brt_dst->bif_ifp
203 * Software state for each bridge.
205 struct bridge_softc {
206 struct ifnet *sc_ifp; /* make this an interface */
207 LIST_ENTRY(bridge_softc) sc_list;
210 uint32_t sc_brtmax; /* max # of addresses */
211 uint32_t sc_brtcnt; /* cur. # of addresses */
212 uint32_t sc_brttimeout; /* rt timeout in seconds */
213 struct callout sc_brcallout; /* bridge callout */
214 uint32_t sc_iflist_ref; /* refcount for sc_iflist */
215 uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
216 LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
217 LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
218 LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
219 uint32_t sc_rthash_key; /* key for hash */
220 LIST_HEAD(, bridge_iflist) sc_spanlist; /* span ports list */
221 struct bstp_state sc_stp; /* STP state */
222 uint32_t sc_brtexceeded; /* # of cache drops */
223 struct ifnet *sc_ifaddr; /* member mac copied from */
224 u_char sc_defaddr[6]; /* Default MAC address */
227 static struct mtx bridge_list_mtx;
228 eventhandler_tag bridge_detach_cookie = NULL;
230 int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
232 uma_zone_t bridge_rtnode_zone;
234 static int bridge_clone_create(struct if_clone *, int, caddr_t);
235 static void bridge_clone_destroy(struct ifnet *);
237 static int bridge_ioctl(struct ifnet *, u_long, caddr_t);
238 static void bridge_mutecaps(struct bridge_softc *);
239 static void bridge_set_ifcap(struct bridge_softc *, struct bridge_iflist *,
241 static void bridge_ifdetach(void *arg __unused, struct ifnet *);
242 static void bridge_init(void *);
243 static void bridge_dummynet(struct mbuf *, struct ifnet *);
244 static void bridge_stop(struct ifnet *, int);
245 static int bridge_transmit(struct ifnet *, struct mbuf *);
246 static void bridge_qflush(struct ifnet *);
247 static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
248 static int bridge_output(struct ifnet *, struct mbuf *, struct sockaddr *,
250 static int bridge_enqueue(struct bridge_softc *, struct ifnet *,
252 static void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
254 static void bridge_forward(struct bridge_softc *, struct bridge_iflist *,
257 static void bridge_timer(void *);
259 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
261 static void bridge_span(struct bridge_softc *, struct mbuf *);
263 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
264 uint16_t, struct bridge_iflist *, int, uint8_t);
265 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *,
267 static void bridge_rttrim(struct bridge_softc *);
268 static void bridge_rtage(struct bridge_softc *);
269 static void bridge_rtflush(struct bridge_softc *, int);
270 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *,
273 static void bridge_rtable_init(struct bridge_softc *);
274 static void bridge_rtable_fini(struct bridge_softc *);
276 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
277 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
278 const uint8_t *, uint16_t);
279 static int bridge_rtnode_insert(struct bridge_softc *,
280 struct bridge_rtnode *);
281 static void bridge_rtnode_destroy(struct bridge_softc *,
282 struct bridge_rtnode *);
283 static void bridge_rtable_expire(struct ifnet *, int);
284 static void bridge_state_change(struct ifnet *, int);
286 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
288 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
290 static void bridge_delete_member(struct bridge_softc *,
291 struct bridge_iflist *, int);
292 static void bridge_delete_span(struct bridge_softc *,
293 struct bridge_iflist *);
295 static int bridge_ioctl_add(struct bridge_softc *, void *);
296 static int bridge_ioctl_del(struct bridge_softc *, void *);
297 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
298 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
299 static int bridge_ioctl_scache(struct bridge_softc *, void *);
300 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
301 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
302 static int bridge_ioctl_rts(struct bridge_softc *, void *);
303 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
304 static int bridge_ioctl_sto(struct bridge_softc *, void *);
305 static int bridge_ioctl_gto(struct bridge_softc *, void *);
306 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
307 static int bridge_ioctl_flush(struct bridge_softc *, void *);
308 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
309 static int bridge_ioctl_spri(struct bridge_softc *, void *);
310 static int bridge_ioctl_ght(struct bridge_softc *, void *);
311 static int bridge_ioctl_sht(struct bridge_softc *, void *);
312 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
313 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
314 static int bridge_ioctl_gma(struct bridge_softc *, void *);
315 static int bridge_ioctl_sma(struct bridge_softc *, void *);
316 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
317 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
318 static int bridge_ioctl_sifmaxaddr(struct bridge_softc *, void *);
319 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
320 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
321 static int bridge_ioctl_gbparam(struct bridge_softc *, void *);
322 static int bridge_ioctl_grte(struct bridge_softc *, void *);
323 static int bridge_ioctl_gifsstp(struct bridge_softc *, void *);
324 static int bridge_ioctl_sproto(struct bridge_softc *, void *);
325 static int bridge_ioctl_stxhc(struct bridge_softc *, void *);
326 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
328 static int bridge_ip_checkbasic(struct mbuf **mp);
330 static int bridge_ip6_checkbasic(struct mbuf **mp);
332 static int bridge_fragment(struct ifnet *, struct mbuf *,
333 struct ether_header *, int, struct llc *);
334 static void bridge_linkstate(struct ifnet *ifp);
335 static void bridge_linkcheck(struct bridge_softc *sc);
337 extern void (*bridge_linkstate_p)(struct ifnet *ifp);
339 /* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
340 #define VLANTAGOF(_m) \
341 (_m->m_flags & M_VLANTAG) ? EVL_VLANOFTAG(_m->m_pkthdr.ether_vtag) : 1
343 static struct bstp_cb_ops bridge_ops = {
344 .bcb_state = bridge_state_change,
345 .bcb_rtage = bridge_rtable_expire
348 SYSCTL_DECL(_net_link);
349 static SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
351 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
352 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
353 static int pfil_member = 1; /* run pfil hooks on the member interface */
354 static int pfil_ipfw = 0; /* layer2 filter with ipfw */
355 static int pfil_ipfw_arp = 0; /* layer2 filter with ipfw */
356 static int pfil_local_phys = 0; /* run pfil hooks on the physical interface for
357 locally destined packets */
358 static int log_stp = 0; /* log STP state changes */
359 static int bridge_inherit_mac = 0; /* share MAC with first bridge member */
360 TUNABLE_INT("net.link.bridge.pfil_onlyip", &pfil_onlyip);
361 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
362 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
363 TUNABLE_INT("net.link.bridge.ipfw_arp", &pfil_ipfw_arp);
364 SYSCTL_INT(_net_link_bridge, OID_AUTO, ipfw_arp, CTLFLAG_RW,
365 &pfil_ipfw_arp, 0, "Filter ARP packets through IPFW layer2");
366 TUNABLE_INT("net.link.bridge.pfil_bridge", &pfil_bridge);
367 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
368 &pfil_bridge, 0, "Packet filter on the bridge interface");
369 TUNABLE_INT("net.link.bridge.pfil_member", &pfil_member);
370 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
371 &pfil_member, 0, "Packet filter on the member interface");
372 TUNABLE_INT("net.link.bridge.pfil_local_phys", &pfil_local_phys);
373 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_local_phys, CTLFLAG_RW,
375 "Packet filter on the physical interface for locally destined packets");
376 TUNABLE_INT("net.link.bridge.log_stp", &log_stp);
377 SYSCTL_INT(_net_link_bridge, OID_AUTO, log_stp, CTLFLAG_RW,
378 &log_stp, 0, "Log STP state changes");
379 TUNABLE_INT("net.link.bridge.inherit_mac", &bridge_inherit_mac);
380 SYSCTL_INT(_net_link_bridge, OID_AUTO, inherit_mac, CTLFLAG_RW,
381 &bridge_inherit_mac, 0,
382 "Inherit MAC address from the first bridge member");
384 struct bridge_control {
385 int (*bc_func)(struct bridge_softc *, void *);
390 #define BC_F_COPYIN 0x01 /* copy arguments in */
391 #define BC_F_COPYOUT 0x02 /* copy arguments out */
392 #define BC_F_SUSER 0x04 /* do super-user check */
394 const struct bridge_control bridge_control_table[] = {
395 { bridge_ioctl_add, sizeof(struct ifbreq),
396 BC_F_COPYIN|BC_F_SUSER },
397 { bridge_ioctl_del, sizeof(struct ifbreq),
398 BC_F_COPYIN|BC_F_SUSER },
400 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
401 BC_F_COPYIN|BC_F_COPYOUT },
402 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
403 BC_F_COPYIN|BC_F_SUSER },
405 { bridge_ioctl_scache, sizeof(struct ifbrparam),
406 BC_F_COPYIN|BC_F_SUSER },
407 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
410 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
411 BC_F_COPYIN|BC_F_COPYOUT },
412 { bridge_ioctl_rts, sizeof(struct ifbaconf),
413 BC_F_COPYIN|BC_F_COPYOUT },
415 { bridge_ioctl_saddr, sizeof(struct ifbareq),
416 BC_F_COPYIN|BC_F_SUSER },
418 { bridge_ioctl_sto, sizeof(struct ifbrparam),
419 BC_F_COPYIN|BC_F_SUSER },
420 { bridge_ioctl_gto, sizeof(struct ifbrparam),
423 { bridge_ioctl_daddr, sizeof(struct ifbareq),
424 BC_F_COPYIN|BC_F_SUSER },
426 { bridge_ioctl_flush, sizeof(struct ifbreq),
427 BC_F_COPYIN|BC_F_SUSER },
429 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
431 { bridge_ioctl_spri, sizeof(struct ifbrparam),
432 BC_F_COPYIN|BC_F_SUSER },
434 { bridge_ioctl_ght, sizeof(struct ifbrparam),
436 { bridge_ioctl_sht, sizeof(struct ifbrparam),
437 BC_F_COPYIN|BC_F_SUSER },
439 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
441 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
442 BC_F_COPYIN|BC_F_SUSER },
444 { bridge_ioctl_gma, sizeof(struct ifbrparam),
446 { bridge_ioctl_sma, sizeof(struct ifbrparam),
447 BC_F_COPYIN|BC_F_SUSER },
449 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
450 BC_F_COPYIN|BC_F_SUSER },
452 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
453 BC_F_COPYIN|BC_F_SUSER },
455 { bridge_ioctl_addspan, sizeof(struct ifbreq),
456 BC_F_COPYIN|BC_F_SUSER },
457 { bridge_ioctl_delspan, sizeof(struct ifbreq),
458 BC_F_COPYIN|BC_F_SUSER },
460 { bridge_ioctl_gbparam, sizeof(struct ifbropreq),
463 { bridge_ioctl_grte, sizeof(struct ifbrparam),
466 { bridge_ioctl_gifsstp, sizeof(struct ifbpstpconf),
467 BC_F_COPYIN|BC_F_COPYOUT },
469 { bridge_ioctl_sproto, sizeof(struct ifbrparam),
470 BC_F_COPYIN|BC_F_SUSER },
472 { bridge_ioctl_stxhc, sizeof(struct ifbrparam),
473 BC_F_COPYIN|BC_F_SUSER },
475 { bridge_ioctl_sifmaxaddr, sizeof(struct ifbreq),
476 BC_F_COPYIN|BC_F_SUSER },
479 const int bridge_control_table_size =
480 sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
482 LIST_HEAD(, bridge_softc) bridge_list;
484 static struct if_clone *bridge_cloner;
485 static const char bridge_name[] = "bridge";
488 bridge_modevent(module_t mod, int type, void *data)
493 mtx_init(&bridge_list_mtx, "if_bridge list", NULL, MTX_DEF);
494 bridge_cloner = if_clone_simple(bridge_name,
495 bridge_clone_create, bridge_clone_destroy, 0);
496 bridge_rtnode_zone = uma_zcreate("bridge_rtnode",
497 sizeof(struct bridge_rtnode), NULL, NULL, NULL, NULL,
499 LIST_INIT(&bridge_list);
500 bridge_input_p = bridge_input;
501 bridge_output_p = bridge_output;
502 bridge_dn_p = bridge_dummynet;
503 bridge_linkstate_p = bridge_linkstate;
504 bridge_detach_cookie = EVENTHANDLER_REGISTER(
505 ifnet_departure_event, bridge_ifdetach, NULL,
506 EVENTHANDLER_PRI_ANY);
509 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
510 bridge_detach_cookie);
511 if_clone_detach(bridge_cloner);
512 uma_zdestroy(bridge_rtnode_zone);
513 bridge_input_p = NULL;
514 bridge_output_p = NULL;
516 bridge_linkstate_p = NULL;
517 mtx_destroy(&bridge_list_mtx);
525 static moduledata_t bridge_mod = {
531 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
532 MODULE_DEPEND(if_bridge, bridgestp, 1, 1, 1);
535 * handler for net.link.bridge.pfil_ipfw
538 sysctl_pfil_ipfw(SYSCTL_HANDLER_ARGS)
540 int enable = pfil_ipfw;
543 error = sysctl_handle_int(oidp, &enable, 0, req);
544 enable = (enable) ? 1 : 0;
546 if (enable != pfil_ipfw) {
550 * Disable pfil so that ipfw doesnt run twice, if the user
551 * really wants both then they can re-enable pfil_bridge and/or
552 * pfil_member. Also allow non-ip packets as ipfw can filter by
564 SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw, CTLTYPE_INT|CTLFLAG_RW,
565 &pfil_ipfw, 0, &sysctl_pfil_ipfw, "I", "Layer2 filter with IPFW");
568 * bridge_clone_create:
570 * Create a new bridge instance.
573 bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params)
575 struct bridge_softc *sc, *sc2;
576 struct ifnet *bifp, *ifp;
578 unsigned long hostid;
580 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
581 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
587 BRIDGE_LOCK_INIT(sc);
588 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
589 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
591 /* Initialize our routing table. */
592 bridge_rtable_init(sc);
594 callout_init_mtx(&sc->sc_brcallout, &sc->sc_mtx, 0);
596 LIST_INIT(&sc->sc_iflist);
597 LIST_INIT(&sc->sc_spanlist);
600 if_initname(ifp, bridge_name, unit);
601 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
602 ifp->if_ioctl = bridge_ioctl;
603 ifp->if_transmit = bridge_transmit;
604 ifp->if_qflush = bridge_qflush;
605 ifp->if_init = bridge_init;
606 ifp->if_type = IFT_BRIDGE;
609 * Generate an ethernet address with a locally administered address.
611 * Since we are using random ethernet addresses for the bridge, it is
612 * possible that we might have address collisions, so make sure that
613 * this hardware address isn't already in use on another bridge.
614 * The first try uses the hostid and falls back to arc4rand().
617 getcredhostid(curthread->td_ucred, &hostid);
618 for (retry = 1; retry != 0;) {
619 if (fb || hostid == 0) {
620 arc4rand(sc->sc_defaddr, ETHER_ADDR_LEN, 1);
621 sc->sc_defaddr[0] &= ~1;/* clear multicast bit */
622 sc->sc_defaddr[0] |= 2; /* set the LAA bit */
624 sc->sc_defaddr[0] = 0x2;
625 sc->sc_defaddr[1] = (hostid >> 24) & 0xff;
626 sc->sc_defaddr[2] = (hostid >> 16) & 0xff;
627 sc->sc_defaddr[3] = (hostid >> 8 ) & 0xff;
628 sc->sc_defaddr[4] = hostid & 0xff;
629 sc->sc_defaddr[5] = ifp->if_dunit & 0xff;
634 mtx_lock(&bridge_list_mtx);
635 LIST_FOREACH(sc2, &bridge_list, sc_list) {
637 if (memcmp(sc->sc_defaddr,
638 IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0)
641 mtx_unlock(&bridge_list_mtx);
644 bstp_attach(&sc->sc_stp, &bridge_ops);
645 ether_ifattach(ifp, sc->sc_defaddr);
646 /* Now undo some of the damage... */
647 ifp->if_baudrate = 0;
648 ifp->if_type = IFT_BRIDGE;
650 mtx_lock(&bridge_list_mtx);
651 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
652 mtx_unlock(&bridge_list_mtx);
658 * bridge_clone_destroy:
660 * Destroy a bridge instance.
663 bridge_clone_destroy(struct ifnet *ifp)
665 struct bridge_softc *sc = ifp->if_softc;
666 struct bridge_iflist *bif;
671 ifp->if_flags &= ~IFF_UP;
673 while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
674 bridge_delete_member(sc, bif, 0);
676 while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL) {
677 bridge_delete_span(sc, bif);
682 callout_drain(&sc->sc_brcallout);
684 mtx_lock(&bridge_list_mtx);
685 LIST_REMOVE(sc, sc_list);
686 mtx_unlock(&bridge_list_mtx);
688 bstp_detach(&sc->sc_stp);
692 /* Tear down the routing table. */
693 bridge_rtable_fini(sc);
695 BRIDGE_LOCK_DESTROY(sc);
702 * Handle a control request from the operator.
705 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
707 struct bridge_softc *sc = ifp->if_softc;
708 struct ifreq *ifr = (struct ifreq *)data;
709 struct bridge_iflist *bif;
710 struct thread *td = curthread;
712 struct ifbreq ifbreq;
713 struct ifbifconf ifbifconf;
714 struct ifbareq ifbareq;
715 struct ifbaconf ifbaconf;
716 struct ifbrparam ifbrparam;
717 struct ifbropreq ifbropreq;
719 struct ifdrv *ifd = (struct ifdrv *) data;
720 const struct bridge_control *bc;
731 if (ifd->ifd_cmd >= bridge_control_table_size) {
735 bc = &bridge_control_table[ifd->ifd_cmd];
737 if (cmd == SIOCGDRVSPEC &&
738 (bc->bc_flags & BC_F_COPYOUT) == 0) {
742 else if (cmd == SIOCSDRVSPEC &&
743 (bc->bc_flags & BC_F_COPYOUT) != 0) {
748 if (bc->bc_flags & BC_F_SUSER) {
749 error = priv_check(td, PRIV_NET_BRIDGE);
754 if (ifd->ifd_len != bc->bc_argsize ||
755 ifd->ifd_len > sizeof(args)) {
760 bzero(&args, sizeof(args));
761 if (bc->bc_flags & BC_F_COPYIN) {
762 error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
768 error = (*bc->bc_func)(sc, &args);
773 if (bc->bc_flags & BC_F_COPYOUT)
774 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
779 if (!(ifp->if_flags & IFF_UP) &&
780 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
782 * If interface is marked down and it is running,
783 * then stop and disable it.
788 } else if ((ifp->if_flags & IFF_UP) &&
789 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
791 * If interface is marked up and it is stopped, then
799 if (ifr->ifr_mtu < 576) {
803 if (LIST_EMPTY(&sc->sc_iflist)) {
804 sc->sc_ifp->if_mtu = ifr->ifr_mtu;
808 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
809 if (bif->bif_ifp->if_mtu != ifr->ifr_mtu) {
810 log(LOG_NOTICE, "%s: invalid MTU: %lu(%s)"
811 " != %d\n", sc->sc_ifp->if_xname,
812 bif->bif_ifp->if_mtu,
813 bif->bif_ifp->if_xname, ifr->ifr_mtu);
819 sc->sc_ifp->if_mtu = ifr->ifr_mtu;
824 * drop the lock as ether_ioctl() will call bridge_start() and
825 * cause the lock to be recursed.
827 error = ether_ioctl(ifp, cmd, data);
837 * Clear or restore unwanted capabilities on the member interface
840 bridge_mutecaps(struct bridge_softc *sc)
842 struct bridge_iflist *bif;
845 /* Initial bitmask of capabilities to test */
846 mask = BRIDGE_IFCAPS_MASK;
848 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
849 /* Every member must support it or its disabled */
850 mask &= bif->bif_savedcaps;
853 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
854 enabled = bif->bif_ifp->if_capenable;
855 enabled &= ~BRIDGE_IFCAPS_STRIP;
856 /* strip off mask bits and enable them again if allowed */
857 enabled &= ~BRIDGE_IFCAPS_MASK;
859 bridge_set_ifcap(sc, bif, enabled);
865 bridge_set_ifcap(struct bridge_softc *sc, struct bridge_iflist *bif, int set)
867 struct ifnet *ifp = bif->bif_ifp;
871 bzero(&ifr, sizeof(ifr));
872 ifr.ifr_reqcap = set;
874 if (ifp->if_capenable != set) {
875 error = (*ifp->if_ioctl)(ifp, SIOCSIFCAP, (caddr_t)&ifr);
877 if_printf(sc->sc_ifp,
878 "error setting interface capabilities on %s\n",
884 * bridge_lookup_member:
886 * Lookup a bridge member interface.
888 static struct bridge_iflist *
889 bridge_lookup_member(struct bridge_softc *sc, const char *name)
891 struct bridge_iflist *bif;
894 BRIDGE_LOCK_ASSERT(sc);
896 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
898 if (strcmp(ifp->if_xname, name) == 0)
906 * bridge_lookup_member_if:
908 * Lookup a bridge member interface by ifnet*.
910 static struct bridge_iflist *
911 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
913 struct bridge_iflist *bif;
915 BRIDGE_LOCK_ASSERT(sc);
917 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
918 if (bif->bif_ifp == member_ifp)
926 * bridge_delete_member:
928 * Delete the specified member interface.
931 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
934 struct ifnet *ifs = bif->bif_ifp;
935 struct ifnet *fif = NULL;
937 BRIDGE_LOCK_ASSERT(sc);
939 if (bif->bif_flags & IFBIF_STP)
940 bstp_disable(&bif->bif_stp);
942 ifs->if_bridge = NULL;
944 LIST_REMOVE(bif, bif_next);
948 * If removing the interface that gave the bridge its mac address, set
949 * the mac address of the bridge to the address of the next member, or
950 * to its default address if no members are left.
952 if (bridge_inherit_mac && sc->sc_ifaddr == ifs) {
953 if (LIST_EMPTY(&sc->sc_iflist)) {
954 bcopy(sc->sc_defaddr,
955 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
956 sc->sc_ifaddr = NULL;
958 fif = LIST_FIRST(&sc->sc_iflist)->bif_ifp;
959 bcopy(IF_LLADDR(fif),
960 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
963 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
966 bridge_linkcheck(sc);
967 bridge_mutecaps(sc); /* recalcuate now this interface is removed */
968 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
969 KASSERT(bif->bif_addrcnt == 0,
970 ("%s: %d bridge routes referenced", __func__, bif->bif_addrcnt));
974 switch (ifs->if_type) {
978 * Take the interface out of promiscuous mode.
980 (void) ifpromisc(ifs, 0);
988 panic("bridge_delete_member: impossible");
992 /* reneable any interface capabilities */
993 bridge_set_ifcap(sc, bif, bif->bif_savedcaps);
995 bstp_destroy(&bif->bif_stp); /* prepare to free */
1001 * bridge_delete_span:
1003 * Delete the specified span interface.
1006 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
1008 BRIDGE_LOCK_ASSERT(sc);
1010 KASSERT(bif->bif_ifp->if_bridge == NULL,
1011 ("%s: not a span interface", __func__));
1013 LIST_REMOVE(bif, bif_next);
1014 free(bif, M_DEVBUF);
1018 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
1020 struct ifbreq *req = arg;
1021 struct bridge_iflist *bif = NULL;
1025 ifs = ifunit(req->ifbr_ifsname);
1028 if (ifs->if_ioctl == NULL) /* must be supported */
1031 /* If it's in the span list, it can't be a member. */
1032 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1033 if (ifs == bif->bif_ifp)
1036 if (ifs->if_bridge == sc)
1039 if (ifs->if_bridge != NULL)
1042 bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
1047 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
1048 bif->bif_savedcaps = ifs->if_capenable;
1050 switch (ifs->if_type) {
1054 /* permitted interface types */
1061 /* Allow the first Ethernet member to define the MTU */
1062 if (LIST_EMPTY(&sc->sc_iflist))
1063 sc->sc_ifp->if_mtu = ifs->if_mtu;
1064 else if (sc->sc_ifp->if_mtu != ifs->if_mtu) {
1065 if_printf(sc->sc_ifp, "invalid MTU: %lu(%s) != %lu\n",
1066 ifs->if_mtu, ifs->if_xname, sc->sc_ifp->if_mtu);
1072 * Assign the interface's MAC address to the bridge if it's the first
1073 * member and the MAC address of the bridge has not been changed from
1074 * the default randomly generated one.
1076 if (bridge_inherit_mac && LIST_EMPTY(&sc->sc_iflist) &&
1077 !memcmp(IF_LLADDR(sc->sc_ifp), sc->sc_defaddr, ETHER_ADDR_LEN)) {
1078 bcopy(IF_LLADDR(ifs), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
1079 sc->sc_ifaddr = ifs;
1080 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
1083 ifs->if_bridge = sc;
1084 bstp_create(&sc->sc_stp, &bif->bif_stp, bif->bif_ifp);
1086 * XXX: XLOCK HERE!?!
1088 * NOTE: insert_***HEAD*** should be safe for the traversals.
1090 LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
1092 /* Set interface capabilities to the intersection set of all members */
1093 bridge_mutecaps(sc);
1094 bridge_linkcheck(sc);
1096 /* Place the interface into promiscuous mode */
1097 switch (ifs->if_type) {
1101 error = ifpromisc(ifs, 1);
1106 bridge_delete_member(sc, bif, 0);
1110 free(bif, M_DEVBUF);
1116 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
1118 struct ifbreq *req = arg;
1119 struct bridge_iflist *bif;
1121 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1125 bridge_delete_member(sc, bif, 0);
1131 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
1133 struct ifbreq *req = arg;
1134 struct bridge_iflist *bif;
1135 struct bstp_port *bp;
1137 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1142 req->ifbr_ifsflags = bif->bif_flags;
1143 req->ifbr_state = bp->bp_state;
1144 req->ifbr_priority = bp->bp_priority;
1145 req->ifbr_path_cost = bp->bp_path_cost;
1146 req->ifbr_portno = bif->bif_ifp->if_index & 0xfff;
1147 req->ifbr_proto = bp->bp_protover;
1148 req->ifbr_role = bp->bp_role;
1149 req->ifbr_stpflags = bp->bp_flags;
1150 req->ifbr_addrcnt = bif->bif_addrcnt;
1151 req->ifbr_addrmax = bif->bif_addrmax;
1152 req->ifbr_addrexceeded = bif->bif_addrexceeded;
1154 /* Copy STP state options as flags */
1155 if (bp->bp_operedge)
1156 req->ifbr_ifsflags |= IFBIF_BSTP_EDGE;
1157 if (bp->bp_flags & BSTP_PORT_AUTOEDGE)
1158 req->ifbr_ifsflags |= IFBIF_BSTP_AUTOEDGE;
1159 if (bp->bp_ptp_link)
1160 req->ifbr_ifsflags |= IFBIF_BSTP_PTP;
1161 if (bp->bp_flags & BSTP_PORT_AUTOPTP)
1162 req->ifbr_ifsflags |= IFBIF_BSTP_AUTOPTP;
1163 if (bp->bp_flags & BSTP_PORT_ADMEDGE)
1164 req->ifbr_ifsflags |= IFBIF_BSTP_ADMEDGE;
1165 if (bp->bp_flags & BSTP_PORT_ADMCOST)
1166 req->ifbr_ifsflags |= IFBIF_BSTP_ADMCOST;
1171 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
1173 struct ifbreq *req = arg;
1174 struct bridge_iflist *bif;
1175 struct bstp_port *bp;
1178 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1183 if (req->ifbr_ifsflags & IFBIF_SPAN)
1184 /* SPAN is readonly */
1187 if (req->ifbr_ifsflags & IFBIF_STP) {
1188 if ((bif->bif_flags & IFBIF_STP) == 0) {
1189 error = bstp_enable(&bif->bif_stp);
1194 if ((bif->bif_flags & IFBIF_STP) != 0)
1195 bstp_disable(&bif->bif_stp);
1198 /* Pass on STP flags */
1199 bstp_set_edge(bp, req->ifbr_ifsflags & IFBIF_BSTP_EDGE ? 1 : 0);
1200 bstp_set_autoedge(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOEDGE ? 1 : 0);
1201 bstp_set_ptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_PTP ? 1 : 0);
1202 bstp_set_autoptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOPTP ? 1 : 0);
1204 /* Save the bits relating to the bridge */
1205 bif->bif_flags = req->ifbr_ifsflags & IFBIFMASK;
1211 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1213 struct ifbrparam *param = arg;
1215 sc->sc_brtmax = param->ifbrp_csize;
1222 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1224 struct ifbrparam *param = arg;
1226 param->ifbrp_csize = sc->sc_brtmax;
1232 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1234 struct ifbifconf *bifc = arg;
1235 struct bridge_iflist *bif;
1238 int count, buflen, len, error = 0;
1241 LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
1243 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1246 buflen = sizeof(breq) * count;
1247 if (bifc->ifbic_len == 0) {
1248 bifc->ifbic_len = buflen;
1252 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1257 len = min(bifc->ifbic_len, buflen);
1258 bzero(&breq, sizeof(breq));
1259 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1260 if (len < sizeof(breq))
1263 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1264 sizeof(breq.ifbr_ifsname));
1265 /* Fill in the ifbreq structure */
1266 error = bridge_ioctl_gifflags(sc, &breq);
1269 memcpy(buf, &breq, sizeof(breq));
1271 buf += sizeof(breq);
1272 len -= sizeof(breq);
1274 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1275 if (len < sizeof(breq))
1278 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1279 sizeof(breq.ifbr_ifsname));
1280 breq.ifbr_ifsflags = bif->bif_flags;
1281 breq.ifbr_portno = bif->bif_ifp->if_index & 0xfff;
1282 memcpy(buf, &breq, sizeof(breq));
1284 buf += sizeof(breq);
1285 len -= sizeof(breq);
1289 bifc->ifbic_len = sizeof(breq) * count;
1290 error = copyout(outbuf, bifc->ifbic_req, bifc->ifbic_len);
1292 free(outbuf, M_TEMP);
1297 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1299 struct ifbaconf *bac = arg;
1300 struct bridge_rtnode *brt;
1301 struct ifbareq bareq;
1303 int count, buflen, len, error = 0;
1305 if (bac->ifbac_len == 0)
1309 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list)
1311 buflen = sizeof(bareq) * count;
1314 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1319 len = min(bac->ifbac_len, buflen);
1320 bzero(&bareq, sizeof(bareq));
1321 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
1322 if (len < sizeof(bareq))
1324 strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
1325 sizeof(bareq.ifba_ifsname));
1326 memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1327 bareq.ifba_vlan = brt->brt_vlan;
1328 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1329 time_uptime < brt->brt_expire)
1330 bareq.ifba_expire = brt->brt_expire - time_uptime;
1332 bareq.ifba_expire = 0;
1333 bareq.ifba_flags = brt->brt_flags;
1335 memcpy(buf, &bareq, sizeof(bareq));
1337 buf += sizeof(bareq);
1338 len -= sizeof(bareq);
1342 bac->ifbac_len = sizeof(bareq) * count;
1343 error = copyout(outbuf, bac->ifbac_req, bac->ifbac_len);
1345 free(outbuf, M_TEMP);
1350 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1352 struct ifbareq *req = arg;
1353 struct bridge_iflist *bif;
1356 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1360 error = bridge_rtupdate(sc, req->ifba_dst, req->ifba_vlan, bif, 1,
1367 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1369 struct ifbrparam *param = arg;
1371 sc->sc_brttimeout = param->ifbrp_ctime;
1376 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1378 struct ifbrparam *param = arg;
1380 param->ifbrp_ctime = sc->sc_brttimeout;
1385 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1387 struct ifbareq *req = arg;
1389 return (bridge_rtdaddr(sc, req->ifba_dst, req->ifba_vlan));
1393 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1395 struct ifbreq *req = arg;
1397 bridge_rtflush(sc, req->ifbr_ifsflags);
1402 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1404 struct ifbrparam *param = arg;
1405 struct bstp_state *bs = &sc->sc_stp;
1407 param->ifbrp_prio = bs->bs_bridge_priority;
1412 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1414 struct ifbrparam *param = arg;
1416 return (bstp_set_priority(&sc->sc_stp, param->ifbrp_prio));
1420 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1422 struct ifbrparam *param = arg;
1423 struct bstp_state *bs = &sc->sc_stp;
1425 param->ifbrp_hellotime = bs->bs_bridge_htime >> 8;
1430 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1432 struct ifbrparam *param = arg;
1434 return (bstp_set_htime(&sc->sc_stp, param->ifbrp_hellotime));
1438 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1440 struct ifbrparam *param = arg;
1441 struct bstp_state *bs = &sc->sc_stp;
1443 param->ifbrp_fwddelay = bs->bs_bridge_fdelay >> 8;
1448 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1450 struct ifbrparam *param = arg;
1452 return (bstp_set_fdelay(&sc->sc_stp, param->ifbrp_fwddelay));
1456 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1458 struct ifbrparam *param = arg;
1459 struct bstp_state *bs = &sc->sc_stp;
1461 param->ifbrp_maxage = bs->bs_bridge_max_age >> 8;
1466 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1468 struct ifbrparam *param = arg;
1470 return (bstp_set_maxage(&sc->sc_stp, param->ifbrp_maxage));
1474 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1476 struct ifbreq *req = arg;
1477 struct bridge_iflist *bif;
1479 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1483 return (bstp_set_port_priority(&bif->bif_stp, req->ifbr_priority));
1487 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1489 struct ifbreq *req = arg;
1490 struct bridge_iflist *bif;
1492 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1496 return (bstp_set_path_cost(&bif->bif_stp, req->ifbr_path_cost));
1500 bridge_ioctl_sifmaxaddr(struct bridge_softc *sc, void *arg)
1502 struct ifbreq *req = arg;
1503 struct bridge_iflist *bif;
1505 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1509 bif->bif_addrmax = req->ifbr_addrmax;
1514 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1516 struct ifbreq *req = arg;
1517 struct bridge_iflist *bif = NULL;
1520 ifs = ifunit(req->ifbr_ifsname);
1524 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1525 if (ifs == bif->bif_ifp)
1528 if (ifs->if_bridge != NULL)
1531 switch (ifs->if_type) {
1540 bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
1545 bif->bif_flags = IFBIF_SPAN;
1547 LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1553 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1555 struct ifbreq *req = arg;
1556 struct bridge_iflist *bif;
1559 ifs = ifunit(req->ifbr_ifsname);
1563 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1564 if (ifs == bif->bif_ifp)
1570 bridge_delete_span(sc, bif);
1576 bridge_ioctl_gbparam(struct bridge_softc *sc, void *arg)
1578 struct ifbropreq *req = arg;
1579 struct bstp_state *bs = &sc->sc_stp;
1580 struct bstp_port *root_port;
1582 req->ifbop_maxage = bs->bs_bridge_max_age >> 8;
1583 req->ifbop_hellotime = bs->bs_bridge_htime >> 8;
1584 req->ifbop_fwddelay = bs->bs_bridge_fdelay >> 8;
1586 root_port = bs->bs_root_port;
1587 if (root_port == NULL)
1588 req->ifbop_root_port = 0;
1590 req->ifbop_root_port = root_port->bp_ifp->if_index;
1592 req->ifbop_holdcount = bs->bs_txholdcount;
1593 req->ifbop_priority = bs->bs_bridge_priority;
1594 req->ifbop_protocol = bs->bs_protover;
1595 req->ifbop_root_path_cost = bs->bs_root_pv.pv_cost;
1596 req->ifbop_bridgeid = bs->bs_bridge_pv.pv_dbridge_id;
1597 req->ifbop_designated_root = bs->bs_root_pv.pv_root_id;
1598 req->ifbop_designated_bridge = bs->bs_root_pv.pv_dbridge_id;
1599 req->ifbop_last_tc_time.tv_sec = bs->bs_last_tc_time.tv_sec;
1600 req->ifbop_last_tc_time.tv_usec = bs->bs_last_tc_time.tv_usec;
1606 bridge_ioctl_grte(struct bridge_softc *sc, void *arg)
1608 struct ifbrparam *param = arg;
1610 param->ifbrp_cexceeded = sc->sc_brtexceeded;
1615 bridge_ioctl_gifsstp(struct bridge_softc *sc, void *arg)
1617 struct ifbpstpconf *bifstp = arg;
1618 struct bridge_iflist *bif;
1619 struct bstp_port *bp;
1620 struct ifbpstpreq bpreq;
1622 int count, buflen, len, error = 0;
1625 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1626 if ((bif->bif_flags & IFBIF_STP) != 0)
1630 buflen = sizeof(bpreq) * count;
1631 if (bifstp->ifbpstp_len == 0) {
1632 bifstp->ifbpstp_len = buflen;
1637 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1642 len = min(bifstp->ifbpstp_len, buflen);
1643 bzero(&bpreq, sizeof(bpreq));
1644 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1645 if (len < sizeof(bpreq))
1648 if ((bif->bif_flags & IFBIF_STP) == 0)
1652 bpreq.ifbp_portno = bif->bif_ifp->if_index & 0xfff;
1653 bpreq.ifbp_fwd_trans = bp->bp_forward_transitions;
1654 bpreq.ifbp_design_cost = bp->bp_desg_pv.pv_cost;
1655 bpreq.ifbp_design_port = bp->bp_desg_pv.pv_port_id;
1656 bpreq.ifbp_design_bridge = bp->bp_desg_pv.pv_dbridge_id;
1657 bpreq.ifbp_design_root = bp->bp_desg_pv.pv_root_id;
1659 memcpy(buf, &bpreq, sizeof(bpreq));
1661 buf += sizeof(bpreq);
1662 len -= sizeof(bpreq);
1666 bifstp->ifbpstp_len = sizeof(bpreq) * count;
1667 error = copyout(outbuf, bifstp->ifbpstp_req, bifstp->ifbpstp_len);
1669 free(outbuf, M_TEMP);
1674 bridge_ioctl_sproto(struct bridge_softc *sc, void *arg)
1676 struct ifbrparam *param = arg;
1678 return (bstp_set_protocol(&sc->sc_stp, param->ifbrp_proto));
1682 bridge_ioctl_stxhc(struct bridge_softc *sc, void *arg)
1684 struct ifbrparam *param = arg;
1686 return (bstp_set_holdcount(&sc->sc_stp, param->ifbrp_txhc));
1692 * Detach an interface from a bridge. Called when a member
1693 * interface is detaching.
1696 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1698 struct bridge_softc *sc = ifp->if_bridge;
1699 struct bridge_iflist *bif;
1701 /* Check if the interface is a bridge member */
1705 bif = bridge_lookup_member_if(sc, ifp);
1707 bridge_delete_member(sc, bif, 1);
1713 /* Check if the interface is a span port */
1714 mtx_lock(&bridge_list_mtx);
1715 LIST_FOREACH(sc, &bridge_list, sc_list) {
1717 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1718 if (ifp == bif->bif_ifp) {
1719 bridge_delete_span(sc, bif);
1725 mtx_unlock(&bridge_list_mtx);
1731 * Initialize a bridge interface.
1734 bridge_init(void *xsc)
1736 struct bridge_softc *sc = (struct bridge_softc *)xsc;
1737 struct ifnet *ifp = sc->sc_ifp;
1739 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1743 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1746 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1747 bstp_init(&sc->sc_stp); /* Initialize Spanning Tree */
1755 * Stop the bridge interface.
1758 bridge_stop(struct ifnet *ifp, int disable)
1760 struct bridge_softc *sc = ifp->if_softc;
1762 BRIDGE_LOCK_ASSERT(sc);
1764 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1767 callout_stop(&sc->sc_brcallout);
1768 bstp_stop(&sc->sc_stp);
1770 bridge_rtflush(sc, IFBF_FLUSHDYN);
1772 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1778 * Enqueue a packet on a bridge member interface.
1782 bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
1788 /* We may be sending a fragment so traverse the mbuf */
1791 m->m_nextpkt = NULL;
1792 len = m->m_pkthdr.len;
1793 mflags = m->m_flags;
1796 * If underlying interface can not do VLAN tag insertion itself
1797 * then attach a packet tag that holds it.
1799 if ((m->m_flags & M_VLANTAG) &&
1800 (dst_ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0) {
1801 m = ether_vlanencap(m, m->m_pkthdr.ether_vtag);
1804 "unable to prepend VLAN header\n");
1805 dst_ifp->if_oerrors++;
1808 m->m_flags &= ~M_VLANTAG;
1811 if ((err = dst_ifp->if_transmit(dst_ifp, m))) {
1813 sc->sc_ifp->if_oerrors++;
1817 sc->sc_ifp->if_opackets++;
1818 sc->sc_ifp->if_obytes += len;
1819 if (mflags & M_MCAST)
1820 sc->sc_ifp->if_omcasts++;
1829 * Receive a queued packet from dummynet and pass it on to the output
1832 * The mbuf has the Ethernet header already attached.
1835 bridge_dummynet(struct mbuf *m, struct ifnet *ifp)
1837 struct bridge_softc *sc;
1839 sc = ifp->if_bridge;
1842 * The packet didnt originate from a member interface. This should only
1843 * ever happen if a member interface is removed while packets are
1851 if (PFIL_HOOKED(&V_inet_pfil_hook)
1853 || PFIL_HOOKED(&V_inet6_pfil_hook)
1856 if (bridge_pfil(&m, sc->sc_ifp, ifp, PFIL_OUT) != 0)
1862 bridge_enqueue(sc, ifp, m);
1868 * Send output from a bridge member interface. This
1869 * performs the bridging function for locally originated
1872 * The mbuf has the Ethernet header already attached. We must
1873 * enqueue or free the mbuf before returning.
1876 bridge_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *sa,
1879 struct ether_header *eh;
1880 struct ifnet *dst_if;
1881 struct bridge_softc *sc;
1884 if (m->m_len < ETHER_HDR_LEN) {
1885 m = m_pullup(m, ETHER_HDR_LEN);
1890 eh = mtod(m, struct ether_header *);
1891 sc = ifp->if_bridge;
1892 vlan = VLANTAGOF(m);
1897 * If bridge is down, but the original output interface is up,
1898 * go ahead and send out that interface. Otherwise, the packet
1901 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1907 * If the packet is a multicast, or we don't know a better way to
1908 * get there, send to all interfaces.
1910 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1913 dst_if = bridge_rtlookup(sc, eh->ether_dhost, vlan);
1914 if (dst_if == NULL) {
1915 struct bridge_iflist *bif;
1917 int error = 0, used = 0;
1921 BRIDGE_LOCK2REF(sc, error);
1927 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1928 dst_if = bif->bif_ifp;
1930 if (dst_if->if_type == IFT_GIF)
1932 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
1936 * If this is not the original output interface,
1937 * and the interface is participating in spanning
1938 * tree, make sure the port is in a state that
1939 * allows forwarding.
1941 if (dst_if != ifp && (bif->bif_flags & IFBIF_STP) &&
1942 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
1945 if (LIST_NEXT(bif, bif_next) == NULL) {
1949 mc = m_copypacket(m, M_DONTWAIT);
1951 sc->sc_ifp->if_oerrors++;
1956 bridge_enqueue(sc, dst_if, mc);
1966 * XXX Spanning tree consideration here?
1970 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1977 bridge_enqueue(sc, dst_if, m);
1984 * Do output on a bridge.
1988 bridge_transmit(struct ifnet *ifp, struct mbuf *m)
1990 struct bridge_softc *sc;
1995 ETHER_BPF_MTAP(ifp, m);
1999 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2000 struct ether_header *eh;
2001 struct ifnet *dst_if;
2003 eh = mtod(m, struct ether_header *);
2004 dst_if = bridge_rtlookup(sc, eh->ether_dhost, 1);
2006 error = bridge_enqueue(sc, dst_if, m);
2008 bridge_broadcast(sc, ifp, m, 0);
2014 * The ifp->if_qflush entry point for if_bridge(4) is no-op.
2017 bridge_qflush(struct ifnet *ifp __unused)
2024 * The forwarding function of the bridge.
2026 * NOTE: Releases the lock on return.
2029 bridge_forward(struct bridge_softc *sc, struct bridge_iflist *sbif,
2032 struct bridge_iflist *dbif;
2033 struct ifnet *src_if, *dst_if, *ifp;
2034 struct ether_header *eh;
2039 src_if = m->m_pkthdr.rcvif;
2043 ifp->if_ibytes += m->m_pkthdr.len;
2044 vlan = VLANTAGOF(m);
2046 if ((sbif->bif_flags & IFBIF_STP) &&
2047 sbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2050 eh = mtod(m, struct ether_header *);
2051 dst = eh->ether_dhost;
2053 /* If the interface is learning, record the address. */
2054 if (sbif->bif_flags & IFBIF_LEARNING) {
2055 error = bridge_rtupdate(sc, eh->ether_shost, vlan,
2056 sbif, 0, IFBAF_DYNAMIC);
2058 * If the interface has addresses limits then deny any source
2059 * that is not in the cache.
2061 if (error && sbif->bif_addrmax)
2065 if ((sbif->bif_flags & IFBIF_STP) != 0 &&
2066 sbif->bif_stp.bp_state == BSTP_IFSTATE_LEARNING)
2070 * At this point, the port either doesn't participate
2071 * in spanning tree or it is in the forwarding state.
2075 * If the packet is unicast, destined for someone on
2076 * "this" side of the bridge, drop it.
2078 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2079 dst_if = bridge_rtlookup(sc, dst, vlan);
2080 if (src_if == dst_if)
2084 * Check if its a reserved multicast address, any address
2085 * listed in 802.1D section 7.12.6 may not be forwarded by the
2087 * This is currently 01-80-C2-00-00-00 to 01-80-C2-00-00-0F
2089 if (dst[0] == 0x01 && dst[1] == 0x80 &&
2090 dst[2] == 0xc2 && dst[3] == 0x00 &&
2091 dst[4] == 0x00 && dst[5] <= 0x0f)
2094 /* ...forward it to all interfaces. */
2100 * If we have a destination interface which is a member of our bridge,
2101 * OR this is a unicast packet, push it through the bpf(4) machinery.
2102 * For broadcast or multicast packets, don't bother because it will
2103 * be reinjected into ether_input. We do this before we pass the packets
2104 * through the pfil(9) framework, as it is possible that pfil(9) will
2105 * drop the packet, or possibly modify it, making it difficult to debug
2106 * firewall issues on the bridge.
2108 if (dst_if != NULL || (m->m_flags & (M_BCAST | M_MCAST)) == 0)
2109 ETHER_BPF_MTAP(ifp, m);
2111 /* run the packet filter */
2112 if (PFIL_HOOKED(&V_inet_pfil_hook)
2114 || PFIL_HOOKED(&V_inet6_pfil_hook)
2118 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
2125 if (dst_if == NULL) {
2126 bridge_broadcast(sc, src_if, m, 1);
2131 * At this point, we're dealing with a unicast frame
2132 * going to a different interface.
2134 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2137 dbif = bridge_lookup_member_if(sc, dst_if);
2139 /* Not a member of the bridge (anymore?) */
2142 /* Private segments can not talk to each other */
2143 if (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE)
2146 if ((dbif->bif_flags & IFBIF_STP) &&
2147 dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2152 if (PFIL_HOOKED(&V_inet_pfil_hook)
2154 || PFIL_HOOKED(&V_inet6_pfil_hook)
2157 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
2163 bridge_enqueue(sc, dst_if, m);
2174 * Receive input from a member interface. Queue the packet for
2175 * bridging if it is not for us.
2177 static struct mbuf *
2178 bridge_input(struct ifnet *ifp, struct mbuf *m)
2180 struct bridge_softc *sc = ifp->if_bridge;
2181 struct bridge_iflist *bif, *bif2;
2183 struct ether_header *eh;
2184 struct mbuf *mc, *mc2;
2188 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2192 vlan = VLANTAGOF(m);
2195 * Implement support for bridge monitoring. If this flag has been
2196 * set on this interface, discard the packet once we push it through
2197 * the bpf(4) machinery, but before we do, increment the byte and
2198 * packet counters associated with this interface.
2200 if ((bifp->if_flags & IFF_MONITOR) != 0) {
2201 m->m_pkthdr.rcvif = bifp;
2202 ETHER_BPF_MTAP(bifp, m);
2203 bifp->if_ipackets++;
2204 bifp->if_ibytes += m->m_pkthdr.len;
2209 bif = bridge_lookup_member_if(sc, ifp);
2215 eh = mtod(m, struct ether_header *);
2219 if (m->m_flags & (M_BCAST|M_MCAST)) {
2220 /* Tap off 802.1D packets; they do not get forwarded. */
2221 if (memcmp(eh->ether_dhost, bstp_etheraddr,
2222 ETHER_ADDR_LEN) == 0) {
2223 bstp_input(&bif->bif_stp, ifp, m); /* consumes mbuf */
2228 if ((bif->bif_flags & IFBIF_STP) &&
2229 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
2235 * Make a deep copy of the packet and enqueue the copy
2236 * for bridge processing; return the original packet for
2239 mc = m_dup(m, M_DONTWAIT);
2245 /* Perform the bridge forwarding function with the copy. */
2246 bridge_forward(sc, bif, mc);
2249 * Reinject the mbuf as arriving on the bridge so we have a
2250 * chance at claiming multicast packets. We can not loop back
2251 * here from ether_input as a bridge is never a member of a
2254 KASSERT(bifp->if_bridge == NULL,
2255 ("loop created in bridge_input"));
2256 mc2 = m_dup(m, M_DONTWAIT);
2258 /* Keep the layer3 header aligned */
2259 int i = min(mc2->m_pkthdr.len, max_protohdr);
2260 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
2263 mc2->m_pkthdr.rcvif = bifp;
2264 (*bifp->if_input)(bifp, mc2);
2267 /* Return the original packet for local processing. */
2271 if ((bif->bif_flags & IFBIF_STP) &&
2272 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
2277 #if (defined(INET) || defined(INET6))
2278 # define OR_CARP_CHECK_WE_ARE_DST(iface) \
2279 || ((iface)->if_carp \
2280 && (*carp_forus_p)((iface), eh->ether_dhost))
2281 # define OR_CARP_CHECK_WE_ARE_SRC(iface) \
2282 || ((iface)->if_carp \
2283 && (*carp_forus_p)((iface), eh->ether_shost))
2285 # define OR_CARP_CHECK_WE_ARE_DST(iface)
2286 # define OR_CARP_CHECK_WE_ARE_SRC(iface)
2290 # define OR_PFIL_HOOKED_INET6 \
2291 || PFIL_HOOKED(&V_inet6_pfil_hook)
2293 # define OR_PFIL_HOOKED_INET6
2296 #define GRAB_OUR_PACKETS(iface) \
2297 if ((iface)->if_type == IFT_GIF) \
2299 /* It is destined for us. */ \
2300 if (memcmp(IF_LLADDR((iface)), eh->ether_dhost, ETHER_ADDR_LEN) == 0 \
2301 OR_CARP_CHECK_WE_ARE_DST((iface)) \
2303 if ((iface)->if_type == IFT_BRIDGE) { \
2304 ETHER_BPF_MTAP(iface, m); \
2305 iface->if_ipackets++; \
2306 iface->if_ibytes += m->m_pkthdr.len; \
2307 /* Filter on the physical interface. */ \
2308 if (pfil_local_phys && \
2309 (PFIL_HOOKED(&V_inet_pfil_hook) \
2310 OR_PFIL_HOOKED_INET6)) { \
2311 if (bridge_pfil(&m, NULL, ifp, \
2312 PFIL_IN) != 0 || m == NULL) { \
2313 BRIDGE_UNLOCK(sc); \
2318 if (bif->bif_flags & IFBIF_LEARNING) { \
2319 error = bridge_rtupdate(sc, eh->ether_shost, \
2320 vlan, bif, 0, IFBAF_DYNAMIC); \
2321 if (error && bif->bif_addrmax) { \
2322 BRIDGE_UNLOCK(sc); \
2327 m->m_pkthdr.rcvif = iface; \
2328 BRIDGE_UNLOCK(sc); \
2332 /* We just received a packet that we sent out. */ \
2333 if (memcmp(IF_LLADDR((iface)), eh->ether_shost, ETHER_ADDR_LEN) == 0 \
2334 OR_CARP_CHECK_WE_ARE_SRC((iface)) \
2336 BRIDGE_UNLOCK(sc); \
2342 * Unicast. Make sure it's not for the bridge.
2344 do { GRAB_OUR_PACKETS(bifp) } while (0);
2347 * Give a chance for ifp at first priority. This will help when the
2348 * packet comes through the interface like VLAN's with the same MACs
2349 * on several interfaces from the same bridge. This also will save
2350 * some CPU cycles in case the destination interface and the input
2351 * interface (eq ifp) are the same.
2353 do { GRAB_OUR_PACKETS(ifp) } while (0);
2355 /* Now check the all bridge members. */
2356 LIST_FOREACH(bif2, &sc->sc_iflist, bif_next) {
2357 GRAB_OUR_PACKETS(bif2->bif_ifp)
2360 #undef OR_CARP_CHECK_WE_ARE_DST
2361 #undef OR_CARP_CHECK_WE_ARE_SRC
2362 #undef OR_PFIL_HOOKED_INET6
2363 #undef GRAB_OUR_PACKETS
2365 /* Perform the bridge forwarding function. */
2366 bridge_forward(sc, bif, m);
2374 * Send a frame to all interfaces that are members of
2375 * the bridge, except for the one on which the packet
2378 * NOTE: Releases the lock on return.
2381 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
2382 struct mbuf *m, int runfilt)
2384 struct bridge_iflist *dbif, *sbif;
2386 struct ifnet *dst_if;
2387 int error = 0, used = 0, i;
2389 sbif = bridge_lookup_member_if(sc, src_if);
2391 BRIDGE_LOCK2REF(sc, error);
2397 /* Filter on the bridge interface before broadcasting */
2398 if (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
2400 || PFIL_HOOKED(&V_inet6_pfil_hook)
2403 if (bridge_pfil(&m, sc->sc_ifp, NULL, PFIL_OUT) != 0)
2409 LIST_FOREACH(dbif, &sc->sc_iflist, bif_next) {
2410 dst_if = dbif->bif_ifp;
2411 if (dst_if == src_if)
2414 /* Private segments can not talk to each other */
2415 if (sbif && (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE))
2418 if ((dbif->bif_flags & IFBIF_STP) &&
2419 dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2422 if ((dbif->bif_flags & IFBIF_DISCOVER) == 0 &&
2423 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2426 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2429 if (LIST_NEXT(dbif, bif_next) == NULL) {
2433 mc = m_dup(m, M_DONTWAIT);
2435 sc->sc_ifp->if_oerrors++;
2441 * Filter on the output interface. Pass a NULL bridge interface
2442 * pointer so we do not redundantly filter on the bridge for
2443 * each interface we broadcast on.
2445 if (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
2447 || PFIL_HOOKED(&V_inet6_pfil_hook)
2451 /* Keep the layer3 header aligned */
2452 i = min(mc->m_pkthdr.len, max_protohdr);
2453 mc = m_copyup(mc, i, ETHER_ALIGN);
2455 sc->sc_ifp->if_oerrors++;
2459 if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
2465 bridge_enqueue(sc, dst_if, mc);
2477 * Duplicate a packet out one or more interfaces that are in span mode,
2478 * the original mbuf is unmodified.
2481 bridge_span(struct bridge_softc *sc, struct mbuf *m)
2483 struct bridge_iflist *bif;
2484 struct ifnet *dst_if;
2487 if (LIST_EMPTY(&sc->sc_spanlist))
2490 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2491 dst_if = bif->bif_ifp;
2493 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2496 mc = m_copypacket(m, M_DONTWAIT);
2498 sc->sc_ifp->if_oerrors++;
2502 bridge_enqueue(sc, dst_if, mc);
2509 * Add a bridge routing entry.
2512 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst, uint16_t vlan,
2513 struct bridge_iflist *bif, int setflags, uint8_t flags)
2515 struct bridge_rtnode *brt;
2518 BRIDGE_LOCK_ASSERT(sc);
2520 /* Check the source address is valid and not multicast. */
2521 if (ETHER_IS_MULTICAST(dst) ||
2522 (dst[0] == 0 && dst[1] == 0 && dst[2] == 0 &&
2523 dst[3] == 0 && dst[4] == 0 && dst[5] == 0) != 0)
2526 /* 802.1p frames map to vlan 1 */
2531 * A route for this destination might already exist. If so,
2532 * update it, otherwise create a new one.
2534 if ((brt = bridge_rtnode_lookup(sc, dst, vlan)) == NULL) {
2535 if (sc->sc_brtcnt >= sc->sc_brtmax) {
2536 sc->sc_brtexceeded++;
2539 /* Check per interface address limits (if enabled) */
2540 if (bif->bif_addrmax && bif->bif_addrcnt >= bif->bif_addrmax) {
2541 bif->bif_addrexceeded++;
2546 * Allocate a new bridge forwarding node, and
2547 * initialize the expiration time and Ethernet
2550 brt = uma_zalloc(bridge_rtnode_zone, M_NOWAIT | M_ZERO);
2554 if (bif->bif_flags & IFBIF_STICKY)
2555 brt->brt_flags = IFBAF_STICKY;
2557 brt->brt_flags = IFBAF_DYNAMIC;
2559 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2560 brt->brt_vlan = vlan;
2562 if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
2563 uma_zfree(bridge_rtnode_zone, brt);
2570 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2571 brt->brt_dst != bif) {
2572 brt->brt_dst->bif_addrcnt--;
2574 brt->brt_dst->bif_addrcnt++;
2577 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2578 brt->brt_expire = time_uptime + sc->sc_brttimeout;
2580 brt->brt_flags = flags;
2588 * Lookup the destination interface for an address.
2590 static struct ifnet *
2591 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2593 struct bridge_rtnode *brt;
2595 BRIDGE_LOCK_ASSERT(sc);
2597 if ((brt = bridge_rtnode_lookup(sc, addr, vlan)) == NULL)
2600 return (brt->brt_ifp);
2606 * Trim the routine table so that we have a number
2607 * of routing entries less than or equal to the
2611 bridge_rttrim(struct bridge_softc *sc)
2613 struct bridge_rtnode *brt, *nbrt;
2615 BRIDGE_LOCK_ASSERT(sc);
2617 /* Make sure we actually need to do this. */
2618 if (sc->sc_brtcnt <= sc->sc_brtmax)
2621 /* Force an aging cycle; this might trim enough addresses. */
2623 if (sc->sc_brtcnt <= sc->sc_brtmax)
2626 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2627 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2628 bridge_rtnode_destroy(sc, brt);
2629 if (sc->sc_brtcnt <= sc->sc_brtmax)
2638 * Aging timer for the bridge.
2641 bridge_timer(void *arg)
2643 struct bridge_softc *sc = arg;
2645 BRIDGE_LOCK_ASSERT(sc);
2649 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
2650 callout_reset(&sc->sc_brcallout,
2651 bridge_rtable_prune_period * hz, bridge_timer, sc);
2657 * Perform an aging cycle.
2660 bridge_rtage(struct bridge_softc *sc)
2662 struct bridge_rtnode *brt, *nbrt;
2664 BRIDGE_LOCK_ASSERT(sc);
2666 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2667 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2668 if (time_uptime >= brt->brt_expire)
2669 bridge_rtnode_destroy(sc, brt);
2677 * Remove all dynamic addresses from the bridge.
2680 bridge_rtflush(struct bridge_softc *sc, int full)
2682 struct bridge_rtnode *brt, *nbrt;
2684 BRIDGE_LOCK_ASSERT(sc);
2686 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2687 if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2688 bridge_rtnode_destroy(sc, brt);
2695 * Remove an address from the table.
2698 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2700 struct bridge_rtnode *brt;
2703 BRIDGE_LOCK_ASSERT(sc);
2706 * If vlan is zero then we want to delete for all vlans so the lookup
2707 * may return more than one.
2709 while ((brt = bridge_rtnode_lookup(sc, addr, vlan)) != NULL) {
2710 bridge_rtnode_destroy(sc, brt);
2714 return (found ? 0 : ENOENT);
2720 * Delete routes to a speicifc member interface.
2723 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
2725 struct bridge_rtnode *brt, *nbrt;
2727 BRIDGE_LOCK_ASSERT(sc);
2729 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2730 if (brt->brt_ifp == ifp && (full ||
2731 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
2732 bridge_rtnode_destroy(sc, brt);
2737 * bridge_rtable_init:
2739 * Initialize the route table for this bridge.
2742 bridge_rtable_init(struct bridge_softc *sc)
2746 sc->sc_rthash = malloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
2747 M_DEVBUF, M_WAITOK);
2749 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
2750 LIST_INIT(&sc->sc_rthash[i]);
2752 sc->sc_rthash_key = arc4random();
2753 LIST_INIT(&sc->sc_rtlist);
2757 * bridge_rtable_fini:
2759 * Deconstruct the route table for this bridge.
2762 bridge_rtable_fini(struct bridge_softc *sc)
2765 KASSERT(sc->sc_brtcnt == 0,
2766 ("%s: %d bridge routes referenced", __func__, sc->sc_brtcnt));
2767 free(sc->sc_rthash, M_DEVBUF);
2771 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2772 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2774 #define mix(a, b, c) \
2776 a -= b; a -= c; a ^= (c >> 13); \
2777 b -= c; b -= a; b ^= (a << 8); \
2778 c -= a; c -= b; c ^= (b >> 13); \
2779 a -= b; a -= c; a ^= (c >> 12); \
2780 b -= c; b -= a; b ^= (a << 16); \
2781 c -= a; c -= b; c ^= (b >> 5); \
2782 a -= b; a -= c; a ^= (c >> 3); \
2783 b -= c; b -= a; b ^= (a << 10); \
2784 c -= a; c -= b; c ^= (b >> 15); \
2785 } while (/*CONSTCOND*/0)
2787 static __inline uint32_t
2788 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
2790 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
2801 return (c & BRIDGE_RTHASH_MASK);
2807 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
2811 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
2812 d = ((int)a[i]) - ((int)b[i]);
2819 * bridge_rtnode_lookup:
2821 * Look up a bridge route node for the specified destination. Compare the
2822 * vlan id or if zero then just return the first match.
2824 static struct bridge_rtnode *
2825 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2827 struct bridge_rtnode *brt;
2831 BRIDGE_LOCK_ASSERT(sc);
2833 hash = bridge_rthash(sc, addr);
2834 LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
2835 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
2836 if (dir == 0 && (brt->brt_vlan == vlan || vlan == 0))
2846 * bridge_rtnode_insert:
2848 * Insert the specified bridge node into the route table. We
2849 * assume the entry is not already in the table.
2852 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
2854 struct bridge_rtnode *lbrt;
2858 BRIDGE_LOCK_ASSERT(sc);
2860 hash = bridge_rthash(sc, brt->brt_addr);
2862 lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
2864 LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
2869 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
2870 if (dir == 0 && brt->brt_vlan == lbrt->brt_vlan)
2873 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
2876 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
2877 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
2880 lbrt = LIST_NEXT(lbrt, brt_hash);
2881 } while (lbrt != NULL);
2884 panic("bridge_rtnode_insert: impossible");
2888 LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
2895 * bridge_rtnode_destroy:
2897 * Destroy a bridge rtnode.
2900 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
2902 BRIDGE_LOCK_ASSERT(sc);
2904 LIST_REMOVE(brt, brt_hash);
2906 LIST_REMOVE(brt, brt_list);
2908 brt->brt_dst->bif_addrcnt--;
2909 uma_zfree(bridge_rtnode_zone, brt);
2913 * bridge_rtable_expire:
2915 * Set the expiry time for all routes on an interface.
2918 bridge_rtable_expire(struct ifnet *ifp, int age)
2920 struct bridge_softc *sc = ifp->if_bridge;
2921 struct bridge_rtnode *brt;
2926 * If the age is zero then flush, otherwise set all the expiry times to
2927 * age for the interface
2930 bridge_rtdelete(sc, ifp, IFBF_FLUSHDYN);
2932 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
2933 /* Cap the expiry time to 'age' */
2934 if (brt->brt_ifp == ifp &&
2935 brt->brt_expire > time_uptime + age &&
2936 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2937 brt->brt_expire = time_uptime + age;
2944 * bridge_state_change:
2946 * Callback from the bridgestp code when a port changes states.
2949 bridge_state_change(struct ifnet *ifp, int state)
2951 struct bridge_softc *sc = ifp->if_bridge;
2952 static const char *stpstates[] = {
2962 log(LOG_NOTICE, "%s: state changed to %s on %s\n",
2963 sc->sc_ifp->if_xname, stpstates[state], ifp->if_xname);
2967 * Send bridge packets through pfil if they are one of the types pfil can deal
2968 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
2969 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
2973 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
2975 int snap, error, i, hlen;
2976 struct ether_header *eh1, eh2;
2979 u_int16_t ether_type;
2982 error = -1; /* Default error if not error == 0 */
2985 /* we may return with the IP fields swapped, ensure its not shared */
2986 KASSERT(M_WRITABLE(*mp), ("%s: modifying a shared mbuf", __func__));
2989 if (pfil_bridge == 0 && pfil_member == 0 && pfil_ipfw == 0)
2990 return (0); /* filtering is disabled */
2992 i = min((*mp)->m_pkthdr.len, max_protohdr);
2993 if ((*mp)->m_len < i) {
2994 *mp = m_pullup(*mp, i);
2996 printf("%s: m_pullup failed\n", __func__);
3001 eh1 = mtod(*mp, struct ether_header *);
3002 ether_type = ntohs(eh1->ether_type);
3005 * Check for SNAP/LLC.
3007 if (ether_type < ETHERMTU) {
3008 struct llc *llc2 = (struct llc *)(eh1 + 1);
3010 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
3011 llc2->llc_dsap == LLC_SNAP_LSAP &&
3012 llc2->llc_ssap == LLC_SNAP_LSAP &&
3013 llc2->llc_control == LLC_UI) {
3014 ether_type = htons(llc2->llc_un.type_snap.ether_type);
3020 * If we're trying to filter bridge traffic, don't look at anything
3021 * other than IP and ARP traffic. If the filter doesn't understand
3022 * IPv6, don't allow IPv6 through the bridge either. This is lame
3023 * since if we really wanted, say, an AppleTalk filter, we are hosed,
3024 * but of course we don't have an AppleTalk filter to begin with.
3025 * (Note that since pfil doesn't understand ARP it will pass *ALL*
3028 switch (ether_type) {
3030 case ETHERTYPE_REVARP:
3031 if (pfil_ipfw_arp == 0)
3032 return (0); /* Automatically pass */
3037 case ETHERTYPE_IPV6:
3042 * Check to see if the user wants to pass non-ip
3043 * packets, these will not be checked by pfil(9) and
3044 * passed unconditionally so the default is to drop.
3050 /* Run the packet through pfil before stripping link headers */
3051 if (PFIL_HOOKED(&V_link_pfil_hook) && pfil_ipfw != 0 &&
3052 dir == PFIL_OUT && ifp != NULL) {
3054 error = pfil_run_hooks(&V_link_pfil_hook, mp, ifp, dir, NULL);
3056 if (*mp == NULL || error != 0) /* packet consumed by filter */
3060 /* Strip off the Ethernet header and keep a copy. */
3061 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
3062 m_adj(*mp, ETHER_HDR_LEN);
3064 /* Strip off snap header, if present */
3066 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
3067 m_adj(*mp, sizeof(struct llc));
3071 * Check the IP header for alignment and errors
3073 if (dir == PFIL_IN) {
3074 switch (ether_type) {
3076 error = bridge_ip_checkbasic(mp);
3079 case ETHERTYPE_IPV6:
3080 error = bridge_ip6_checkbasic(mp);
3093 * Run the packet through pfil
3095 switch (ether_type) {
3098 * Run pfil on the member interface and the bridge, both can
3099 * be skipped by clearing pfil_member or pfil_bridge.
3102 * in_if -> bridge_if -> out_if
3104 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3105 error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
3108 if (*mp == NULL || error != 0) /* filter may consume */
3111 if (pfil_member && ifp != NULL)
3112 error = pfil_run_hooks(&V_inet_pfil_hook, mp, ifp,
3115 if (*mp == NULL || error != 0) /* filter may consume */
3118 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
3119 error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
3122 if (*mp == NULL || error != 0) /* filter may consume */
3125 /* check if we need to fragment the packet */
3126 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
3127 i = (*mp)->m_pkthdr.len;
3128 if (i > ifp->if_mtu) {
3129 error = bridge_fragment(ifp, *mp, &eh2, snap,
3135 /* Recalculate the ip checksum. */
3136 ip = mtod(*mp, struct ip *);
3137 hlen = ip->ip_hl << 2;
3138 if (hlen < sizeof(struct ip))
3140 if (hlen > (*mp)->m_len) {
3141 if ((*mp = m_pullup(*mp, hlen)) == 0)
3143 ip = mtod(*mp, struct ip *);
3148 if (hlen == sizeof(struct ip))
3149 ip->ip_sum = in_cksum_hdr(ip);
3151 ip->ip_sum = in_cksum(*mp, hlen);
3155 case ETHERTYPE_IPV6:
3156 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3157 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, bifp,
3160 if (*mp == NULL || error != 0) /* filter may consume */
3163 if (pfil_member && ifp != NULL)
3164 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, ifp,
3167 if (*mp == NULL || error != 0) /* filter may consume */
3170 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
3171 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, bifp,
3188 * Finally, put everything back the way it was and return
3191 M_PREPEND(*mp, sizeof(struct llc), M_DONTWAIT);
3194 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
3197 M_PREPEND(*mp, ETHER_HDR_LEN, M_DONTWAIT);
3200 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
3211 * Perform basic checks on header size since
3212 * pfil assumes ip_input has already processed
3213 * it for it. Cut-and-pasted from ip_input.c.
3214 * Given how simple the IPv6 version is,
3215 * does the IPv4 version really need to be
3218 * XXX Should we update ipstat here, or not?
3219 * XXX Right now we update ipstat but not
3223 bridge_ip_checkbasic(struct mbuf **mp)
3225 struct mbuf *m = *mp;
3233 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3234 if ((m = m_copyup(m, sizeof(struct ip),
3235 (max_linkhdr + 3) & ~3)) == NULL) {
3236 /* XXXJRT new stat, please */
3237 KMOD_IPSTAT_INC(ips_toosmall);
3240 } else if (__predict_false(m->m_len < sizeof (struct ip))) {
3241 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
3242 KMOD_IPSTAT_INC(ips_toosmall);
3246 ip = mtod(m, struct ip *);
3247 if (ip == NULL) goto bad;
3249 if (ip->ip_v != IPVERSION) {
3250 KMOD_IPSTAT_INC(ips_badvers);
3253 hlen = ip->ip_hl << 2;
3254 if (hlen < sizeof(struct ip)) { /* minimum header length */
3255 KMOD_IPSTAT_INC(ips_badhlen);
3258 if (hlen > m->m_len) {
3259 if ((m = m_pullup(m, hlen)) == 0) {
3260 KMOD_IPSTAT_INC(ips_badhlen);
3263 ip = mtod(m, struct ip *);
3264 if (ip == NULL) goto bad;
3267 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
3268 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
3270 if (hlen == sizeof(struct ip)) {
3271 sum = in_cksum_hdr(ip);
3273 sum = in_cksum(m, hlen);
3277 KMOD_IPSTAT_INC(ips_badsum);
3281 /* Retrieve the packet length. */
3282 len = ntohs(ip->ip_len);
3285 * Check for additional length bogosity
3288 KMOD_IPSTAT_INC(ips_badlen);
3293 * Check that the amount of data in the buffers
3294 * is as at least much as the IP header would have us expect.
3295 * Drop packet if shorter than we expect.
3297 if (m->m_pkthdr.len < len) {
3298 KMOD_IPSTAT_INC(ips_tooshort);
3302 /* Checks out, proceed */
3313 * Same as above, but for IPv6.
3314 * Cut-and-pasted from ip6_input.c.
3315 * XXX Should we update ip6stat, or not?
3318 bridge_ip6_checkbasic(struct mbuf **mp)
3320 struct mbuf *m = *mp;
3321 struct ip6_hdr *ip6;
3324 * If the IPv6 header is not aligned, slurp it up into a new
3325 * mbuf with space for link headers, in the event we forward
3326 * it. Otherwise, if it is aligned, make sure the entire base
3327 * IPv6 header is in the first mbuf of the chain.
3329 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3330 struct ifnet *inifp = m->m_pkthdr.rcvif;
3331 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
3332 (max_linkhdr + 3) & ~3)) == NULL) {
3333 /* XXXJRT new stat, please */
3334 V_ip6stat.ip6s_toosmall++;
3335 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3338 } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
3339 struct ifnet *inifp = m->m_pkthdr.rcvif;
3340 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
3341 V_ip6stat.ip6s_toosmall++;
3342 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3347 ip6 = mtod(m, struct ip6_hdr *);
3349 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
3350 V_ip6stat.ip6s_badvers++;
3351 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
3355 /* Checks out, proceed */
3368 * Return a fragmented mbuf chain.
3371 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
3372 int snap, struct llc *llc)
3378 if (m->m_len < sizeof(struct ip) &&
3379 (m = m_pullup(m, sizeof(struct ip))) == NULL)
3381 ip = mtod(m, struct ip *);
3383 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist,
3388 /* walk the chain and re-add the Ethernet header */
3389 for (m0 = m; m0; m0 = m0->m_nextpkt) {
3392 M_PREPEND(m0, sizeof(struct llc), M_DONTWAIT);
3397 bcopy(llc, mtod(m0, caddr_t),
3398 sizeof(struct llc));
3400 M_PREPEND(m0, ETHER_HDR_LEN, M_DONTWAIT);
3405 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
3411 KMOD_IPSTAT_INC(ips_fragmented);
3422 bridge_linkstate(struct ifnet *ifp)
3424 struct bridge_softc *sc = ifp->if_bridge;
3425 struct bridge_iflist *bif;
3428 bif = bridge_lookup_member_if(sc, ifp);
3433 bridge_linkcheck(sc);
3436 bstp_linkstate(&bif->bif_stp);
3440 bridge_linkcheck(struct bridge_softc *sc)
3442 struct bridge_iflist *bif;
3443 int new_link, hasls;
3445 BRIDGE_LOCK_ASSERT(sc);
3446 new_link = LINK_STATE_DOWN;
3448 /* Our link is considered up if at least one of our ports is active */
3449 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
3450 if (bif->bif_ifp->if_capabilities & IFCAP_LINKSTATE)
3452 if (bif->bif_ifp->if_link_state == LINK_STATE_UP) {
3453 new_link = LINK_STATE_UP;
3457 if (!LIST_EMPTY(&sc->sc_iflist) && !hasls) {
3458 /* If no interfaces support link-state then we default to up */
3459 new_link = LINK_STATE_UP;
3461 if_link_state_change(sc->sc_ifp, new_link);