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>
121 #include <netinet6/in6_ifattach.h>
123 #if defined(INET) || defined(INET6)
124 #include <netinet/ip_carp.h>
126 #include <machine/in_cksum.h>
127 #include <netinet/if_ether.h> /* for struct arpcom */
128 #include <net/bridgestp.h>
129 #include <net/if_bridgevar.h>
130 #include <net/if_llc.h>
131 #include <net/if_vlan_var.h>
133 #include <net/route.h>
136 * Size of the route hash table. Must be a power of two.
138 #ifndef BRIDGE_RTHASH_SIZE
139 #define BRIDGE_RTHASH_SIZE 1024
142 #define BRIDGE_RTHASH_MASK (BRIDGE_RTHASH_SIZE - 1)
145 * Default maximum number of addresses to cache.
147 #ifndef BRIDGE_RTABLE_MAX
148 #define BRIDGE_RTABLE_MAX 2000
152 * Timeout (in seconds) for entries learned dynamically.
154 #ifndef BRIDGE_RTABLE_TIMEOUT
155 #define BRIDGE_RTABLE_TIMEOUT (20 * 60) /* same as ARP */
159 * Number of seconds between walks of the route list.
161 #ifndef BRIDGE_RTABLE_PRUNE_PERIOD
162 #define BRIDGE_RTABLE_PRUNE_PERIOD (5 * 60)
166 * List of capabilities to possibly mask on the member interface.
168 #define BRIDGE_IFCAPS_MASK (IFCAP_TOE|IFCAP_TSO|IFCAP_TXCSUM)
171 * List of capabilities to strip
173 #define BRIDGE_IFCAPS_STRIP IFCAP_LRO
176 * Bridge interface list entry.
178 struct bridge_iflist {
179 LIST_ENTRY(bridge_iflist) bif_next;
180 struct ifnet *bif_ifp; /* member if */
181 struct bstp_port bif_stp; /* STP state */
182 uint32_t bif_flags; /* member if flags */
183 int bif_savedcaps; /* saved capabilities */
184 uint32_t bif_addrmax; /* max # of addresses */
185 uint32_t bif_addrcnt; /* cur. # of addresses */
186 uint32_t bif_addrexceeded;/* # of address violations */
192 struct bridge_rtnode {
193 LIST_ENTRY(bridge_rtnode) brt_hash; /* hash table linkage */
194 LIST_ENTRY(bridge_rtnode) brt_list; /* list linkage */
195 struct bridge_iflist *brt_dst; /* destination if */
196 unsigned long brt_expire; /* expiration time */
197 uint8_t brt_flags; /* address flags */
198 uint8_t brt_addr[ETHER_ADDR_LEN];
199 uint16_t brt_vlan; /* vlan id */
201 #define brt_ifp brt_dst->bif_ifp
204 * Software state for each bridge.
206 struct bridge_softc {
207 struct ifnet *sc_ifp; /* make this an interface */
208 LIST_ENTRY(bridge_softc) sc_list;
211 uint32_t sc_brtmax; /* max # of addresses */
212 uint32_t sc_brtcnt; /* cur. # of addresses */
213 uint32_t sc_brttimeout; /* rt timeout in seconds */
214 struct callout sc_brcallout; /* bridge callout */
215 uint32_t sc_iflist_ref; /* refcount for sc_iflist */
216 uint32_t sc_iflist_xcnt; /* refcount for sc_iflist */
217 LIST_HEAD(, bridge_iflist) sc_iflist; /* member interface list */
218 LIST_HEAD(, bridge_rtnode) *sc_rthash; /* our forwarding table */
219 LIST_HEAD(, bridge_rtnode) sc_rtlist; /* list version of above */
220 uint32_t sc_rthash_key; /* key for hash */
221 LIST_HEAD(, bridge_iflist) sc_spanlist; /* span ports list */
222 struct bstp_state sc_stp; /* STP state */
223 uint32_t sc_brtexceeded; /* # of cache drops */
224 struct ifnet *sc_ifaddr; /* member mac copied from */
225 u_char sc_defaddr[6]; /* Default MAC address */
228 static struct mtx bridge_list_mtx;
229 eventhandler_tag bridge_detach_cookie = NULL;
231 int bridge_rtable_prune_period = BRIDGE_RTABLE_PRUNE_PERIOD;
233 uma_zone_t bridge_rtnode_zone;
235 static int bridge_clone_create(struct if_clone *, int, caddr_t);
236 static void bridge_clone_destroy(struct ifnet *);
238 static int bridge_ioctl(struct ifnet *, u_long, caddr_t);
239 static void bridge_mutecaps(struct bridge_softc *);
240 static void bridge_set_ifcap(struct bridge_softc *, struct bridge_iflist *,
242 static void bridge_ifdetach(void *arg __unused, struct ifnet *);
243 static void bridge_init(void *);
244 static void bridge_dummynet(struct mbuf *, struct ifnet *);
245 static void bridge_stop(struct ifnet *, int);
246 static int bridge_transmit(struct ifnet *, struct mbuf *);
247 static void bridge_qflush(struct ifnet *);
248 static struct mbuf *bridge_input(struct ifnet *, struct mbuf *);
249 static int bridge_output(struct ifnet *, struct mbuf *, struct sockaddr *,
251 static int bridge_enqueue(struct bridge_softc *, struct ifnet *,
253 static void bridge_rtdelete(struct bridge_softc *, struct ifnet *ifp, int);
255 static void bridge_forward(struct bridge_softc *, struct bridge_iflist *,
258 static void bridge_timer(void *);
260 static void bridge_broadcast(struct bridge_softc *, struct ifnet *,
262 static void bridge_span(struct bridge_softc *, struct mbuf *);
264 static int bridge_rtupdate(struct bridge_softc *, const uint8_t *,
265 uint16_t, struct bridge_iflist *, int, uint8_t);
266 static struct ifnet *bridge_rtlookup(struct bridge_softc *, const uint8_t *,
268 static void bridge_rttrim(struct bridge_softc *);
269 static void bridge_rtage(struct bridge_softc *);
270 static void bridge_rtflush(struct bridge_softc *, int);
271 static int bridge_rtdaddr(struct bridge_softc *, const uint8_t *,
274 static void bridge_rtable_init(struct bridge_softc *);
275 static void bridge_rtable_fini(struct bridge_softc *);
277 static int bridge_rtnode_addr_cmp(const uint8_t *, const uint8_t *);
278 static struct bridge_rtnode *bridge_rtnode_lookup(struct bridge_softc *,
279 const uint8_t *, uint16_t);
280 static int bridge_rtnode_insert(struct bridge_softc *,
281 struct bridge_rtnode *);
282 static void bridge_rtnode_destroy(struct bridge_softc *,
283 struct bridge_rtnode *);
284 static void bridge_rtable_expire(struct ifnet *, int);
285 static void bridge_state_change(struct ifnet *, int);
287 static struct bridge_iflist *bridge_lookup_member(struct bridge_softc *,
289 static struct bridge_iflist *bridge_lookup_member_if(struct bridge_softc *,
291 static void bridge_delete_member(struct bridge_softc *,
292 struct bridge_iflist *, int);
293 static void bridge_delete_span(struct bridge_softc *,
294 struct bridge_iflist *);
296 static int bridge_ioctl_add(struct bridge_softc *, void *);
297 static int bridge_ioctl_del(struct bridge_softc *, void *);
298 static int bridge_ioctl_gifflags(struct bridge_softc *, void *);
299 static int bridge_ioctl_sifflags(struct bridge_softc *, void *);
300 static int bridge_ioctl_scache(struct bridge_softc *, void *);
301 static int bridge_ioctl_gcache(struct bridge_softc *, void *);
302 static int bridge_ioctl_gifs(struct bridge_softc *, void *);
303 static int bridge_ioctl_rts(struct bridge_softc *, void *);
304 static int bridge_ioctl_saddr(struct bridge_softc *, void *);
305 static int bridge_ioctl_sto(struct bridge_softc *, void *);
306 static int bridge_ioctl_gto(struct bridge_softc *, void *);
307 static int bridge_ioctl_daddr(struct bridge_softc *, void *);
308 static int bridge_ioctl_flush(struct bridge_softc *, void *);
309 static int bridge_ioctl_gpri(struct bridge_softc *, void *);
310 static int bridge_ioctl_spri(struct bridge_softc *, void *);
311 static int bridge_ioctl_ght(struct bridge_softc *, void *);
312 static int bridge_ioctl_sht(struct bridge_softc *, void *);
313 static int bridge_ioctl_gfd(struct bridge_softc *, void *);
314 static int bridge_ioctl_sfd(struct bridge_softc *, void *);
315 static int bridge_ioctl_gma(struct bridge_softc *, void *);
316 static int bridge_ioctl_sma(struct bridge_softc *, void *);
317 static int bridge_ioctl_sifprio(struct bridge_softc *, void *);
318 static int bridge_ioctl_sifcost(struct bridge_softc *, void *);
319 static int bridge_ioctl_sifmaxaddr(struct bridge_softc *, void *);
320 static int bridge_ioctl_addspan(struct bridge_softc *, void *);
321 static int bridge_ioctl_delspan(struct bridge_softc *, void *);
322 static int bridge_ioctl_gbparam(struct bridge_softc *, void *);
323 static int bridge_ioctl_grte(struct bridge_softc *, void *);
324 static int bridge_ioctl_gifsstp(struct bridge_softc *, void *);
325 static int bridge_ioctl_sproto(struct bridge_softc *, void *);
326 static int bridge_ioctl_stxhc(struct bridge_softc *, void *);
327 static int bridge_pfil(struct mbuf **, struct ifnet *, struct ifnet *,
329 static int bridge_ip_checkbasic(struct mbuf **mp);
331 static int bridge_ip6_checkbasic(struct mbuf **mp);
333 static int bridge_fragment(struct ifnet *, struct mbuf *,
334 struct ether_header *, int, struct llc *);
335 static void bridge_linkstate(struct ifnet *ifp);
336 static void bridge_linkcheck(struct bridge_softc *sc);
338 extern void (*bridge_linkstate_p)(struct ifnet *ifp);
340 /* The default bridge vlan is 1 (IEEE 802.1Q-2003 Table 9-2) */
341 #define VLANTAGOF(_m) \
342 (_m->m_flags & M_VLANTAG) ? EVL_VLANOFTAG(_m->m_pkthdr.ether_vtag) : 1
344 static struct bstp_cb_ops bridge_ops = {
345 .bcb_state = bridge_state_change,
346 .bcb_rtage = bridge_rtable_expire
349 SYSCTL_DECL(_net_link);
350 static SYSCTL_NODE(_net_link, IFT_BRIDGE, bridge, CTLFLAG_RW, 0, "Bridge");
352 static int pfil_onlyip = 1; /* only pass IP[46] packets when pfil is enabled */
353 static int pfil_bridge = 1; /* run pfil hooks on the bridge interface */
354 static int pfil_member = 1; /* run pfil hooks on the member interface */
355 static int pfil_ipfw = 0; /* layer2 filter with ipfw */
356 static int pfil_ipfw_arp = 0; /* layer2 filter with ipfw */
357 static int pfil_local_phys = 0; /* run pfil hooks on the physical interface for
358 locally destined packets */
359 static int log_stp = 0; /* log STP state changes */
360 static int bridge_inherit_mac = 0; /* share MAC with first bridge member */
361 TUNABLE_INT("net.link.bridge.pfil_onlyip", &pfil_onlyip);
362 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_onlyip, CTLFLAG_RW,
363 &pfil_onlyip, 0, "Only pass IP packets when pfil is enabled");
364 TUNABLE_INT("net.link.bridge.ipfw_arp", &pfil_ipfw_arp);
365 SYSCTL_INT(_net_link_bridge, OID_AUTO, ipfw_arp, CTLFLAG_RW,
366 &pfil_ipfw_arp, 0, "Filter ARP packets through IPFW layer2");
367 TUNABLE_INT("net.link.bridge.pfil_bridge", &pfil_bridge);
368 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_bridge, CTLFLAG_RW,
369 &pfil_bridge, 0, "Packet filter on the bridge interface");
370 TUNABLE_INT("net.link.bridge.pfil_member", &pfil_member);
371 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_member, CTLFLAG_RW,
372 &pfil_member, 0, "Packet filter on the member interface");
373 TUNABLE_INT("net.link.bridge.pfil_local_phys", &pfil_local_phys);
374 SYSCTL_INT(_net_link_bridge, OID_AUTO, pfil_local_phys, CTLFLAG_RW,
376 "Packet filter on the physical interface for locally destined packets");
377 TUNABLE_INT("net.link.bridge.log_stp", &log_stp);
378 SYSCTL_INT(_net_link_bridge, OID_AUTO, log_stp, CTLFLAG_RW,
379 &log_stp, 0, "Log STP state changes");
380 TUNABLE_INT("net.link.bridge.inherit_mac", &bridge_inherit_mac);
381 SYSCTL_INT(_net_link_bridge, OID_AUTO, inherit_mac, CTLFLAG_RW,
382 &bridge_inherit_mac, 0,
383 "Inherit MAC address from the first bridge member");
385 static VNET_DEFINE(int, allow_llz_overlap) = 0;
386 #define V_allow_llz_overlap VNET(allow_llz_overlap)
387 SYSCTL_VNET_INT(_net_link_bridge, OID_AUTO, allow_llz_overlap, CTLFLAG_RW,
388 &VNET_NAME(allow_llz_overlap), 0, "Allow overlap of link-local scope "
389 "zones of a bridge interface and the member interfaces");
391 struct bridge_control {
392 int (*bc_func)(struct bridge_softc *, void *);
397 #define BC_F_COPYIN 0x01 /* copy arguments in */
398 #define BC_F_COPYOUT 0x02 /* copy arguments out */
399 #define BC_F_SUSER 0x04 /* do super-user check */
401 const struct bridge_control bridge_control_table[] = {
402 { bridge_ioctl_add, sizeof(struct ifbreq),
403 BC_F_COPYIN|BC_F_SUSER },
404 { bridge_ioctl_del, sizeof(struct ifbreq),
405 BC_F_COPYIN|BC_F_SUSER },
407 { bridge_ioctl_gifflags, sizeof(struct ifbreq),
408 BC_F_COPYIN|BC_F_COPYOUT },
409 { bridge_ioctl_sifflags, sizeof(struct ifbreq),
410 BC_F_COPYIN|BC_F_SUSER },
412 { bridge_ioctl_scache, sizeof(struct ifbrparam),
413 BC_F_COPYIN|BC_F_SUSER },
414 { bridge_ioctl_gcache, sizeof(struct ifbrparam),
417 { bridge_ioctl_gifs, sizeof(struct ifbifconf),
418 BC_F_COPYIN|BC_F_COPYOUT },
419 { bridge_ioctl_rts, sizeof(struct ifbaconf),
420 BC_F_COPYIN|BC_F_COPYOUT },
422 { bridge_ioctl_saddr, sizeof(struct ifbareq),
423 BC_F_COPYIN|BC_F_SUSER },
425 { bridge_ioctl_sto, sizeof(struct ifbrparam),
426 BC_F_COPYIN|BC_F_SUSER },
427 { bridge_ioctl_gto, sizeof(struct ifbrparam),
430 { bridge_ioctl_daddr, sizeof(struct ifbareq),
431 BC_F_COPYIN|BC_F_SUSER },
433 { bridge_ioctl_flush, sizeof(struct ifbreq),
434 BC_F_COPYIN|BC_F_SUSER },
436 { bridge_ioctl_gpri, sizeof(struct ifbrparam),
438 { bridge_ioctl_spri, sizeof(struct ifbrparam),
439 BC_F_COPYIN|BC_F_SUSER },
441 { bridge_ioctl_ght, sizeof(struct ifbrparam),
443 { bridge_ioctl_sht, sizeof(struct ifbrparam),
444 BC_F_COPYIN|BC_F_SUSER },
446 { bridge_ioctl_gfd, sizeof(struct ifbrparam),
448 { bridge_ioctl_sfd, sizeof(struct ifbrparam),
449 BC_F_COPYIN|BC_F_SUSER },
451 { bridge_ioctl_gma, sizeof(struct ifbrparam),
453 { bridge_ioctl_sma, sizeof(struct ifbrparam),
454 BC_F_COPYIN|BC_F_SUSER },
456 { bridge_ioctl_sifprio, sizeof(struct ifbreq),
457 BC_F_COPYIN|BC_F_SUSER },
459 { bridge_ioctl_sifcost, sizeof(struct ifbreq),
460 BC_F_COPYIN|BC_F_SUSER },
462 { bridge_ioctl_addspan, sizeof(struct ifbreq),
463 BC_F_COPYIN|BC_F_SUSER },
464 { bridge_ioctl_delspan, sizeof(struct ifbreq),
465 BC_F_COPYIN|BC_F_SUSER },
467 { bridge_ioctl_gbparam, sizeof(struct ifbropreq),
470 { bridge_ioctl_grte, sizeof(struct ifbrparam),
473 { bridge_ioctl_gifsstp, sizeof(struct ifbpstpconf),
474 BC_F_COPYIN|BC_F_COPYOUT },
476 { bridge_ioctl_sproto, sizeof(struct ifbrparam),
477 BC_F_COPYIN|BC_F_SUSER },
479 { bridge_ioctl_stxhc, sizeof(struct ifbrparam),
480 BC_F_COPYIN|BC_F_SUSER },
482 { bridge_ioctl_sifmaxaddr, sizeof(struct ifbreq),
483 BC_F_COPYIN|BC_F_SUSER },
486 const int bridge_control_table_size =
487 sizeof(bridge_control_table) / sizeof(bridge_control_table[0]);
489 LIST_HEAD(, bridge_softc) bridge_list;
491 static struct if_clone *bridge_cloner;
492 static const char bridge_name[] = "bridge";
495 bridge_modevent(module_t mod, int type, void *data)
500 mtx_init(&bridge_list_mtx, "if_bridge list", NULL, MTX_DEF);
501 bridge_cloner = if_clone_simple(bridge_name,
502 bridge_clone_create, bridge_clone_destroy, 0);
503 bridge_rtnode_zone = uma_zcreate("bridge_rtnode",
504 sizeof(struct bridge_rtnode), NULL, NULL, NULL, NULL,
506 LIST_INIT(&bridge_list);
507 bridge_input_p = bridge_input;
508 bridge_output_p = bridge_output;
509 bridge_dn_p = bridge_dummynet;
510 bridge_linkstate_p = bridge_linkstate;
511 bridge_detach_cookie = EVENTHANDLER_REGISTER(
512 ifnet_departure_event, bridge_ifdetach, NULL,
513 EVENTHANDLER_PRI_ANY);
516 EVENTHANDLER_DEREGISTER(ifnet_departure_event,
517 bridge_detach_cookie);
518 if_clone_detach(bridge_cloner);
519 uma_zdestroy(bridge_rtnode_zone);
520 bridge_input_p = NULL;
521 bridge_output_p = NULL;
523 bridge_linkstate_p = NULL;
524 mtx_destroy(&bridge_list_mtx);
532 static moduledata_t bridge_mod = {
538 DECLARE_MODULE(if_bridge, bridge_mod, SI_SUB_PSEUDO, SI_ORDER_ANY);
539 MODULE_DEPEND(if_bridge, bridgestp, 1, 1, 1);
542 * handler for net.link.bridge.ipfw
545 sysctl_pfil_ipfw(SYSCTL_HANDLER_ARGS)
547 int enable = pfil_ipfw;
550 error = sysctl_handle_int(oidp, &enable, 0, req);
551 enable = (enable) ? 1 : 0;
553 if (enable != pfil_ipfw) {
557 * Disable pfil so that ipfw doesnt run twice, if the user
558 * really wants both then they can re-enable pfil_bridge and/or
559 * pfil_member. Also allow non-ip packets as ipfw can filter by
571 SYSCTL_PROC(_net_link_bridge, OID_AUTO, ipfw, CTLTYPE_INT|CTLFLAG_RW,
572 &pfil_ipfw, 0, &sysctl_pfil_ipfw, "I", "Layer2 filter with IPFW");
575 * bridge_clone_create:
577 * Create a new bridge instance.
580 bridge_clone_create(struct if_clone *ifc, int unit, caddr_t params)
582 struct bridge_softc *sc, *sc2;
583 struct ifnet *bifp, *ifp;
585 unsigned long hostid;
587 sc = malloc(sizeof(*sc), M_DEVBUF, M_WAITOK|M_ZERO);
588 ifp = sc->sc_ifp = if_alloc(IFT_ETHER);
594 BRIDGE_LOCK_INIT(sc);
595 sc->sc_brtmax = BRIDGE_RTABLE_MAX;
596 sc->sc_brttimeout = BRIDGE_RTABLE_TIMEOUT;
598 /* Initialize our routing table. */
599 bridge_rtable_init(sc);
601 callout_init_mtx(&sc->sc_brcallout, &sc->sc_mtx, 0);
603 LIST_INIT(&sc->sc_iflist);
604 LIST_INIT(&sc->sc_spanlist);
607 if_initname(ifp, bridge_name, unit);
608 ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
609 ifp->if_ioctl = bridge_ioctl;
610 ifp->if_transmit = bridge_transmit;
611 ifp->if_qflush = bridge_qflush;
612 ifp->if_init = bridge_init;
613 ifp->if_type = IFT_BRIDGE;
616 * Generate an ethernet address with a locally administered address.
618 * Since we are using random ethernet addresses for the bridge, it is
619 * possible that we might have address collisions, so make sure that
620 * this hardware address isn't already in use on another bridge.
621 * The first try uses the hostid and falls back to arc4rand().
624 getcredhostid(curthread->td_ucred, &hostid);
626 if (fb || hostid == 0) {
627 arc4rand(sc->sc_defaddr, ETHER_ADDR_LEN, 1);
628 sc->sc_defaddr[0] &= ~1;/* clear multicast bit */
629 sc->sc_defaddr[0] |= 2; /* set the LAA bit */
631 sc->sc_defaddr[0] = 0x2;
632 sc->sc_defaddr[1] = (hostid >> 24) & 0xff;
633 sc->sc_defaddr[2] = (hostid >> 16) & 0xff;
634 sc->sc_defaddr[3] = (hostid >> 8 ) & 0xff;
635 sc->sc_defaddr[4] = hostid & 0xff;
636 sc->sc_defaddr[5] = ifp->if_dunit & 0xff;
641 mtx_lock(&bridge_list_mtx);
642 LIST_FOREACH(sc2, &bridge_list, sc_list) {
644 if (memcmp(sc->sc_defaddr,
645 IF_LLADDR(bifp), ETHER_ADDR_LEN) == 0) {
650 mtx_unlock(&bridge_list_mtx);
651 } while (retry == 1);
653 bstp_attach(&sc->sc_stp, &bridge_ops);
654 ether_ifattach(ifp, sc->sc_defaddr);
655 /* Now undo some of the damage... */
656 ifp->if_baudrate = 0;
657 ifp->if_type = IFT_BRIDGE;
659 mtx_lock(&bridge_list_mtx);
660 LIST_INSERT_HEAD(&bridge_list, sc, sc_list);
661 mtx_unlock(&bridge_list_mtx);
667 * bridge_clone_destroy:
669 * Destroy a bridge instance.
672 bridge_clone_destroy(struct ifnet *ifp)
674 struct bridge_softc *sc = ifp->if_softc;
675 struct bridge_iflist *bif;
680 ifp->if_flags &= ~IFF_UP;
682 while ((bif = LIST_FIRST(&sc->sc_iflist)) != NULL)
683 bridge_delete_member(sc, bif, 0);
685 while ((bif = LIST_FIRST(&sc->sc_spanlist)) != NULL) {
686 bridge_delete_span(sc, bif);
691 callout_drain(&sc->sc_brcallout);
693 mtx_lock(&bridge_list_mtx);
694 LIST_REMOVE(sc, sc_list);
695 mtx_unlock(&bridge_list_mtx);
697 bstp_detach(&sc->sc_stp);
701 /* Tear down the routing table. */
702 bridge_rtable_fini(sc);
704 BRIDGE_LOCK_DESTROY(sc);
711 * Handle a control request from the operator.
714 bridge_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
716 struct bridge_softc *sc = ifp->if_softc;
717 struct ifreq *ifr = (struct ifreq *)data;
718 struct bridge_iflist *bif;
719 struct thread *td = curthread;
721 struct ifbreq ifbreq;
722 struct ifbifconf ifbifconf;
723 struct ifbareq ifbareq;
724 struct ifbaconf ifbaconf;
725 struct ifbrparam ifbrparam;
726 struct ifbropreq ifbropreq;
728 struct ifdrv *ifd = (struct ifdrv *) data;
729 const struct bridge_control *bc;
740 if (ifd->ifd_cmd >= bridge_control_table_size) {
744 bc = &bridge_control_table[ifd->ifd_cmd];
746 if (cmd == SIOCGDRVSPEC &&
747 (bc->bc_flags & BC_F_COPYOUT) == 0) {
751 else if (cmd == SIOCSDRVSPEC &&
752 (bc->bc_flags & BC_F_COPYOUT) != 0) {
757 if (bc->bc_flags & BC_F_SUSER) {
758 error = priv_check(td, PRIV_NET_BRIDGE);
763 if (ifd->ifd_len != bc->bc_argsize ||
764 ifd->ifd_len > sizeof(args)) {
769 bzero(&args, sizeof(args));
770 if (bc->bc_flags & BC_F_COPYIN) {
771 error = copyin(ifd->ifd_data, &args, ifd->ifd_len);
777 error = (*bc->bc_func)(sc, &args);
782 if (bc->bc_flags & BC_F_COPYOUT)
783 error = copyout(&args, ifd->ifd_data, ifd->ifd_len);
788 if (!(ifp->if_flags & IFF_UP) &&
789 (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
791 * If interface is marked down and it is running,
792 * then stop and disable it.
797 } else if ((ifp->if_flags & IFF_UP) &&
798 !(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
800 * If interface is marked up and it is stopped, then
808 if (ifr->ifr_mtu < 576) {
812 if (LIST_EMPTY(&sc->sc_iflist)) {
813 sc->sc_ifp->if_mtu = ifr->ifr_mtu;
817 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
818 if (bif->bif_ifp->if_mtu != ifr->ifr_mtu) {
819 log(LOG_NOTICE, "%s: invalid MTU: %lu(%s)"
820 " != %d\n", sc->sc_ifp->if_xname,
821 bif->bif_ifp->if_mtu,
822 bif->bif_ifp->if_xname, ifr->ifr_mtu);
828 sc->sc_ifp->if_mtu = ifr->ifr_mtu;
833 * drop the lock as ether_ioctl() will call bridge_start() and
834 * cause the lock to be recursed.
836 error = ether_ioctl(ifp, cmd, data);
846 * Clear or restore unwanted capabilities on the member interface
849 bridge_mutecaps(struct bridge_softc *sc)
851 struct bridge_iflist *bif;
854 /* Initial bitmask of capabilities to test */
855 mask = BRIDGE_IFCAPS_MASK;
857 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
858 /* Every member must support it or its disabled */
859 mask &= bif->bif_savedcaps;
862 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
863 enabled = bif->bif_ifp->if_capenable;
864 enabled &= ~BRIDGE_IFCAPS_STRIP;
865 /* strip off mask bits and enable them again if allowed */
866 enabled &= ~BRIDGE_IFCAPS_MASK;
868 bridge_set_ifcap(sc, bif, enabled);
874 bridge_set_ifcap(struct bridge_softc *sc, struct bridge_iflist *bif, int set)
876 struct ifnet *ifp = bif->bif_ifp;
880 bzero(&ifr, sizeof(ifr));
881 ifr.ifr_reqcap = set;
883 if (ifp->if_capenable != set) {
884 error = (*ifp->if_ioctl)(ifp, SIOCSIFCAP, (caddr_t)&ifr);
886 if_printf(sc->sc_ifp,
887 "error setting interface capabilities on %s\n",
893 * bridge_lookup_member:
895 * Lookup a bridge member interface.
897 static struct bridge_iflist *
898 bridge_lookup_member(struct bridge_softc *sc, const char *name)
900 struct bridge_iflist *bif;
903 BRIDGE_LOCK_ASSERT(sc);
905 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
907 if (strcmp(ifp->if_xname, name) == 0)
915 * bridge_lookup_member_if:
917 * Lookup a bridge member interface by ifnet*.
919 static struct bridge_iflist *
920 bridge_lookup_member_if(struct bridge_softc *sc, struct ifnet *member_ifp)
922 struct bridge_iflist *bif;
924 BRIDGE_LOCK_ASSERT(sc);
926 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
927 if (bif->bif_ifp == member_ifp)
935 * bridge_delete_member:
937 * Delete the specified member interface.
940 bridge_delete_member(struct bridge_softc *sc, struct bridge_iflist *bif,
943 struct ifnet *ifs = bif->bif_ifp;
944 struct ifnet *fif = NULL;
946 BRIDGE_LOCK_ASSERT(sc);
948 if (bif->bif_flags & IFBIF_STP)
949 bstp_disable(&bif->bif_stp);
951 ifs->if_bridge = NULL;
953 LIST_REMOVE(bif, bif_next);
957 * If removing the interface that gave the bridge its mac address, set
958 * the mac address of the bridge to the address of the next member, or
959 * to its default address if no members are left.
961 if (bridge_inherit_mac && sc->sc_ifaddr == ifs) {
962 if (LIST_EMPTY(&sc->sc_iflist)) {
963 bcopy(sc->sc_defaddr,
964 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
965 sc->sc_ifaddr = NULL;
967 fif = LIST_FIRST(&sc->sc_iflist)->bif_ifp;
968 bcopy(IF_LLADDR(fif),
969 IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
972 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
975 bridge_linkcheck(sc);
976 bridge_mutecaps(sc); /* recalcuate now this interface is removed */
977 bridge_rtdelete(sc, ifs, IFBF_FLUSHALL);
978 KASSERT(bif->bif_addrcnt == 0,
979 ("%s: %d bridge routes referenced", __func__, bif->bif_addrcnt));
983 switch (ifs->if_type) {
987 * Take the interface out of promiscuous mode, but only
988 * if it was promiscuous in the first place. It might
989 * not be if we're in the bridge_ioctl_add() error path.
991 if (ifs->if_flags & IFF_PROMISC)
992 (void) ifpromisc(ifs, 0);
1000 panic("bridge_delete_member: impossible");
1004 /* reneable any interface capabilities */
1005 bridge_set_ifcap(sc, bif, bif->bif_savedcaps);
1007 bstp_destroy(&bif->bif_stp); /* prepare to free */
1009 free(bif, M_DEVBUF);
1013 * bridge_delete_span:
1015 * Delete the specified span interface.
1018 bridge_delete_span(struct bridge_softc *sc, struct bridge_iflist *bif)
1020 BRIDGE_LOCK_ASSERT(sc);
1022 KASSERT(bif->bif_ifp->if_bridge == NULL,
1023 ("%s: not a span interface", __func__));
1025 LIST_REMOVE(bif, bif_next);
1026 free(bif, M_DEVBUF);
1030 bridge_ioctl_add(struct bridge_softc *sc, void *arg)
1032 struct ifbreq *req = arg;
1033 struct bridge_iflist *bif = NULL;
1037 ifs = ifunit(req->ifbr_ifsname);
1040 if (ifs->if_ioctl == NULL) /* must be supported */
1043 /* If it's in the span list, it can't be a member. */
1044 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1045 if (ifs == bif->bif_ifp)
1048 if (ifs->if_bridge == sc)
1051 if (ifs->if_bridge != NULL)
1054 switch (ifs->if_type) {
1058 /* permitted interface types */
1066 * Two valid inet6 addresses with link-local scope must not be
1067 * on the parent interface and the member interfaces at the
1068 * same time. This restriction is needed to prevent violation
1069 * of link-local scope zone. Attempts to add a member
1070 * interface which has inet6 addresses when the parent has
1071 * inet6 triggers removal of all inet6 addresses on the member
1075 /* Check if the parent interface has a link-local scope addr. */
1076 if (V_allow_llz_overlap == 0 &&
1077 in6ifa_llaonifp(sc->sc_ifp) != NULL) {
1079 * If any, remove all inet6 addresses from the member
1083 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1084 if (in6ifa_llaonifp(bif->bif_ifp)) {
1086 in6_ifdetach(bif->bif_ifp);
1088 if_printf(sc->sc_ifp,
1089 "IPv6 addresses on %s have been removed "
1090 "before adding it as a member to prevent "
1091 "IPv6 address scope violation.\n",
1092 bif->bif_ifp->if_xname);
1096 if (in6ifa_llaonifp(ifs)) {
1100 if_printf(sc->sc_ifp,
1101 "IPv6 addresses on %s have been removed "
1102 "before adding it as a member to prevent "
1103 "IPv6 address scope violation.\n",
1108 /* Allow the first Ethernet member to define the MTU */
1109 if (LIST_EMPTY(&sc->sc_iflist))
1110 sc->sc_ifp->if_mtu = ifs->if_mtu;
1111 else if (sc->sc_ifp->if_mtu != ifs->if_mtu) {
1112 if_printf(sc->sc_ifp, "invalid MTU: %lu(%s) != %lu\n",
1113 ifs->if_mtu, ifs->if_xname, sc->sc_ifp->if_mtu);
1117 bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
1122 bif->bif_flags = IFBIF_LEARNING | IFBIF_DISCOVER;
1123 bif->bif_savedcaps = ifs->if_capenable;
1126 * Assign the interface's MAC address to the bridge if it's the first
1127 * member and the MAC address of the bridge has not been changed from
1128 * the default randomly generated one.
1130 if (bridge_inherit_mac && LIST_EMPTY(&sc->sc_iflist) &&
1131 !memcmp(IF_LLADDR(sc->sc_ifp), sc->sc_defaddr, ETHER_ADDR_LEN)) {
1132 bcopy(IF_LLADDR(ifs), IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
1133 sc->sc_ifaddr = ifs;
1134 EVENTHANDLER_INVOKE(iflladdr_event, sc->sc_ifp);
1137 ifs->if_bridge = sc;
1138 bstp_create(&sc->sc_stp, &bif->bif_stp, bif->bif_ifp);
1140 * XXX: XLOCK HERE!?!
1142 * NOTE: insert_***HEAD*** should be safe for the traversals.
1144 LIST_INSERT_HEAD(&sc->sc_iflist, bif, bif_next);
1146 /* Set interface capabilities to the intersection set of all members */
1147 bridge_mutecaps(sc);
1148 bridge_linkcheck(sc);
1150 /* Place the interface into promiscuous mode */
1151 switch (ifs->if_type) {
1155 error = ifpromisc(ifs, 1);
1161 bridge_delete_member(sc, bif, 0);
1166 bridge_ioctl_del(struct bridge_softc *sc, void *arg)
1168 struct ifbreq *req = arg;
1169 struct bridge_iflist *bif;
1171 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1175 bridge_delete_member(sc, bif, 0);
1181 bridge_ioctl_gifflags(struct bridge_softc *sc, void *arg)
1183 struct ifbreq *req = arg;
1184 struct bridge_iflist *bif;
1185 struct bstp_port *bp;
1187 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1192 req->ifbr_ifsflags = bif->bif_flags;
1193 req->ifbr_state = bp->bp_state;
1194 req->ifbr_priority = bp->bp_priority;
1195 req->ifbr_path_cost = bp->bp_path_cost;
1196 req->ifbr_portno = bif->bif_ifp->if_index & 0xfff;
1197 req->ifbr_proto = bp->bp_protover;
1198 req->ifbr_role = bp->bp_role;
1199 req->ifbr_stpflags = bp->bp_flags;
1200 req->ifbr_addrcnt = bif->bif_addrcnt;
1201 req->ifbr_addrmax = bif->bif_addrmax;
1202 req->ifbr_addrexceeded = bif->bif_addrexceeded;
1204 /* Copy STP state options as flags */
1205 if (bp->bp_operedge)
1206 req->ifbr_ifsflags |= IFBIF_BSTP_EDGE;
1207 if (bp->bp_flags & BSTP_PORT_AUTOEDGE)
1208 req->ifbr_ifsflags |= IFBIF_BSTP_AUTOEDGE;
1209 if (bp->bp_ptp_link)
1210 req->ifbr_ifsflags |= IFBIF_BSTP_PTP;
1211 if (bp->bp_flags & BSTP_PORT_AUTOPTP)
1212 req->ifbr_ifsflags |= IFBIF_BSTP_AUTOPTP;
1213 if (bp->bp_flags & BSTP_PORT_ADMEDGE)
1214 req->ifbr_ifsflags |= IFBIF_BSTP_ADMEDGE;
1215 if (bp->bp_flags & BSTP_PORT_ADMCOST)
1216 req->ifbr_ifsflags |= IFBIF_BSTP_ADMCOST;
1221 bridge_ioctl_sifflags(struct bridge_softc *sc, void *arg)
1223 struct ifbreq *req = arg;
1224 struct bridge_iflist *bif;
1225 struct bstp_port *bp;
1228 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1233 if (req->ifbr_ifsflags & IFBIF_SPAN)
1234 /* SPAN is readonly */
1237 if (req->ifbr_ifsflags & IFBIF_STP) {
1238 if ((bif->bif_flags & IFBIF_STP) == 0) {
1239 error = bstp_enable(&bif->bif_stp);
1244 if ((bif->bif_flags & IFBIF_STP) != 0)
1245 bstp_disable(&bif->bif_stp);
1248 /* Pass on STP flags */
1249 bstp_set_edge(bp, req->ifbr_ifsflags & IFBIF_BSTP_EDGE ? 1 : 0);
1250 bstp_set_autoedge(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOEDGE ? 1 : 0);
1251 bstp_set_ptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_PTP ? 1 : 0);
1252 bstp_set_autoptp(bp, req->ifbr_ifsflags & IFBIF_BSTP_AUTOPTP ? 1 : 0);
1254 /* Save the bits relating to the bridge */
1255 bif->bif_flags = req->ifbr_ifsflags & IFBIFMASK;
1261 bridge_ioctl_scache(struct bridge_softc *sc, void *arg)
1263 struct ifbrparam *param = arg;
1265 sc->sc_brtmax = param->ifbrp_csize;
1272 bridge_ioctl_gcache(struct bridge_softc *sc, void *arg)
1274 struct ifbrparam *param = arg;
1276 param->ifbrp_csize = sc->sc_brtmax;
1282 bridge_ioctl_gifs(struct bridge_softc *sc, void *arg)
1284 struct ifbifconf *bifc = arg;
1285 struct bridge_iflist *bif;
1288 int count, buflen, len, error = 0;
1291 LIST_FOREACH(bif, &sc->sc_iflist, bif_next)
1293 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1296 buflen = sizeof(breq) * count;
1297 if (bifc->ifbic_len == 0) {
1298 bifc->ifbic_len = buflen;
1302 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1307 len = min(bifc->ifbic_len, buflen);
1308 bzero(&breq, sizeof(breq));
1309 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1310 if (len < sizeof(breq))
1313 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1314 sizeof(breq.ifbr_ifsname));
1315 /* Fill in the ifbreq structure */
1316 error = bridge_ioctl_gifflags(sc, &breq);
1319 memcpy(buf, &breq, sizeof(breq));
1321 buf += sizeof(breq);
1322 len -= sizeof(breq);
1324 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
1325 if (len < sizeof(breq))
1328 strlcpy(breq.ifbr_ifsname, bif->bif_ifp->if_xname,
1329 sizeof(breq.ifbr_ifsname));
1330 breq.ifbr_ifsflags = bif->bif_flags;
1331 breq.ifbr_portno = bif->bif_ifp->if_index & 0xfff;
1332 memcpy(buf, &breq, sizeof(breq));
1334 buf += sizeof(breq);
1335 len -= sizeof(breq);
1339 bifc->ifbic_len = sizeof(breq) * count;
1340 error = copyout(outbuf, bifc->ifbic_req, bifc->ifbic_len);
1342 free(outbuf, M_TEMP);
1347 bridge_ioctl_rts(struct bridge_softc *sc, void *arg)
1349 struct ifbaconf *bac = arg;
1350 struct bridge_rtnode *brt;
1351 struct ifbareq bareq;
1353 int count, buflen, len, error = 0;
1355 if (bac->ifbac_len == 0)
1359 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list)
1361 buflen = sizeof(bareq) * count;
1364 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1369 len = min(bac->ifbac_len, buflen);
1370 bzero(&bareq, sizeof(bareq));
1371 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
1372 if (len < sizeof(bareq))
1374 strlcpy(bareq.ifba_ifsname, brt->brt_ifp->if_xname,
1375 sizeof(bareq.ifba_ifsname));
1376 memcpy(bareq.ifba_dst, brt->brt_addr, sizeof(brt->brt_addr));
1377 bareq.ifba_vlan = brt->brt_vlan;
1378 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
1379 time_uptime < brt->brt_expire)
1380 bareq.ifba_expire = brt->brt_expire - time_uptime;
1382 bareq.ifba_expire = 0;
1383 bareq.ifba_flags = brt->brt_flags;
1385 memcpy(buf, &bareq, sizeof(bareq));
1387 buf += sizeof(bareq);
1388 len -= sizeof(bareq);
1392 bac->ifbac_len = sizeof(bareq) * count;
1393 error = copyout(outbuf, bac->ifbac_req, bac->ifbac_len);
1395 free(outbuf, M_TEMP);
1400 bridge_ioctl_saddr(struct bridge_softc *sc, void *arg)
1402 struct ifbareq *req = arg;
1403 struct bridge_iflist *bif;
1406 bif = bridge_lookup_member(sc, req->ifba_ifsname);
1410 error = bridge_rtupdate(sc, req->ifba_dst, req->ifba_vlan, bif, 1,
1417 bridge_ioctl_sto(struct bridge_softc *sc, void *arg)
1419 struct ifbrparam *param = arg;
1421 sc->sc_brttimeout = param->ifbrp_ctime;
1426 bridge_ioctl_gto(struct bridge_softc *sc, void *arg)
1428 struct ifbrparam *param = arg;
1430 param->ifbrp_ctime = sc->sc_brttimeout;
1435 bridge_ioctl_daddr(struct bridge_softc *sc, void *arg)
1437 struct ifbareq *req = arg;
1439 return (bridge_rtdaddr(sc, req->ifba_dst, req->ifba_vlan));
1443 bridge_ioctl_flush(struct bridge_softc *sc, void *arg)
1445 struct ifbreq *req = arg;
1447 bridge_rtflush(sc, req->ifbr_ifsflags);
1452 bridge_ioctl_gpri(struct bridge_softc *sc, void *arg)
1454 struct ifbrparam *param = arg;
1455 struct bstp_state *bs = &sc->sc_stp;
1457 param->ifbrp_prio = bs->bs_bridge_priority;
1462 bridge_ioctl_spri(struct bridge_softc *sc, void *arg)
1464 struct ifbrparam *param = arg;
1466 return (bstp_set_priority(&sc->sc_stp, param->ifbrp_prio));
1470 bridge_ioctl_ght(struct bridge_softc *sc, void *arg)
1472 struct ifbrparam *param = arg;
1473 struct bstp_state *bs = &sc->sc_stp;
1475 param->ifbrp_hellotime = bs->bs_bridge_htime >> 8;
1480 bridge_ioctl_sht(struct bridge_softc *sc, void *arg)
1482 struct ifbrparam *param = arg;
1484 return (bstp_set_htime(&sc->sc_stp, param->ifbrp_hellotime));
1488 bridge_ioctl_gfd(struct bridge_softc *sc, void *arg)
1490 struct ifbrparam *param = arg;
1491 struct bstp_state *bs = &sc->sc_stp;
1493 param->ifbrp_fwddelay = bs->bs_bridge_fdelay >> 8;
1498 bridge_ioctl_sfd(struct bridge_softc *sc, void *arg)
1500 struct ifbrparam *param = arg;
1502 return (bstp_set_fdelay(&sc->sc_stp, param->ifbrp_fwddelay));
1506 bridge_ioctl_gma(struct bridge_softc *sc, void *arg)
1508 struct ifbrparam *param = arg;
1509 struct bstp_state *bs = &sc->sc_stp;
1511 param->ifbrp_maxage = bs->bs_bridge_max_age >> 8;
1516 bridge_ioctl_sma(struct bridge_softc *sc, void *arg)
1518 struct ifbrparam *param = arg;
1520 return (bstp_set_maxage(&sc->sc_stp, param->ifbrp_maxage));
1524 bridge_ioctl_sifprio(struct bridge_softc *sc, void *arg)
1526 struct ifbreq *req = arg;
1527 struct bridge_iflist *bif;
1529 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1533 return (bstp_set_port_priority(&bif->bif_stp, req->ifbr_priority));
1537 bridge_ioctl_sifcost(struct bridge_softc *sc, void *arg)
1539 struct ifbreq *req = arg;
1540 struct bridge_iflist *bif;
1542 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1546 return (bstp_set_path_cost(&bif->bif_stp, req->ifbr_path_cost));
1550 bridge_ioctl_sifmaxaddr(struct bridge_softc *sc, void *arg)
1552 struct ifbreq *req = arg;
1553 struct bridge_iflist *bif;
1555 bif = bridge_lookup_member(sc, req->ifbr_ifsname);
1559 bif->bif_addrmax = req->ifbr_addrmax;
1564 bridge_ioctl_addspan(struct bridge_softc *sc, void *arg)
1566 struct ifbreq *req = arg;
1567 struct bridge_iflist *bif = NULL;
1570 ifs = ifunit(req->ifbr_ifsname);
1574 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1575 if (ifs == bif->bif_ifp)
1578 if (ifs->if_bridge != NULL)
1581 switch (ifs->if_type) {
1590 bif = malloc(sizeof(*bif), M_DEVBUF, M_NOWAIT|M_ZERO);
1595 bif->bif_flags = IFBIF_SPAN;
1597 LIST_INSERT_HEAD(&sc->sc_spanlist, bif, bif_next);
1603 bridge_ioctl_delspan(struct bridge_softc *sc, void *arg)
1605 struct ifbreq *req = arg;
1606 struct bridge_iflist *bif;
1609 ifs = ifunit(req->ifbr_ifsname);
1613 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1614 if (ifs == bif->bif_ifp)
1620 bridge_delete_span(sc, bif);
1626 bridge_ioctl_gbparam(struct bridge_softc *sc, void *arg)
1628 struct ifbropreq *req = arg;
1629 struct bstp_state *bs = &sc->sc_stp;
1630 struct bstp_port *root_port;
1632 req->ifbop_maxage = bs->bs_bridge_max_age >> 8;
1633 req->ifbop_hellotime = bs->bs_bridge_htime >> 8;
1634 req->ifbop_fwddelay = bs->bs_bridge_fdelay >> 8;
1636 root_port = bs->bs_root_port;
1637 if (root_port == NULL)
1638 req->ifbop_root_port = 0;
1640 req->ifbop_root_port = root_port->bp_ifp->if_index;
1642 req->ifbop_holdcount = bs->bs_txholdcount;
1643 req->ifbop_priority = bs->bs_bridge_priority;
1644 req->ifbop_protocol = bs->bs_protover;
1645 req->ifbop_root_path_cost = bs->bs_root_pv.pv_cost;
1646 req->ifbop_bridgeid = bs->bs_bridge_pv.pv_dbridge_id;
1647 req->ifbop_designated_root = bs->bs_root_pv.pv_root_id;
1648 req->ifbop_designated_bridge = bs->bs_root_pv.pv_dbridge_id;
1649 req->ifbop_last_tc_time.tv_sec = bs->bs_last_tc_time.tv_sec;
1650 req->ifbop_last_tc_time.tv_usec = bs->bs_last_tc_time.tv_usec;
1656 bridge_ioctl_grte(struct bridge_softc *sc, void *arg)
1658 struct ifbrparam *param = arg;
1660 param->ifbrp_cexceeded = sc->sc_brtexceeded;
1665 bridge_ioctl_gifsstp(struct bridge_softc *sc, void *arg)
1667 struct ifbpstpconf *bifstp = arg;
1668 struct bridge_iflist *bif;
1669 struct bstp_port *bp;
1670 struct ifbpstpreq bpreq;
1672 int count, buflen, len, error = 0;
1675 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1676 if ((bif->bif_flags & IFBIF_STP) != 0)
1680 buflen = sizeof(bpreq) * count;
1681 if (bifstp->ifbpstp_len == 0) {
1682 bifstp->ifbpstp_len = buflen;
1687 outbuf = malloc(buflen, M_TEMP, M_WAITOK | M_ZERO);
1692 len = min(bifstp->ifbpstp_len, buflen);
1693 bzero(&bpreq, sizeof(bpreq));
1694 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1695 if (len < sizeof(bpreq))
1698 if ((bif->bif_flags & IFBIF_STP) == 0)
1702 bpreq.ifbp_portno = bif->bif_ifp->if_index & 0xfff;
1703 bpreq.ifbp_fwd_trans = bp->bp_forward_transitions;
1704 bpreq.ifbp_design_cost = bp->bp_desg_pv.pv_cost;
1705 bpreq.ifbp_design_port = bp->bp_desg_pv.pv_port_id;
1706 bpreq.ifbp_design_bridge = bp->bp_desg_pv.pv_dbridge_id;
1707 bpreq.ifbp_design_root = bp->bp_desg_pv.pv_root_id;
1709 memcpy(buf, &bpreq, sizeof(bpreq));
1711 buf += sizeof(bpreq);
1712 len -= sizeof(bpreq);
1716 bifstp->ifbpstp_len = sizeof(bpreq) * count;
1717 error = copyout(outbuf, bifstp->ifbpstp_req, bifstp->ifbpstp_len);
1719 free(outbuf, M_TEMP);
1724 bridge_ioctl_sproto(struct bridge_softc *sc, void *arg)
1726 struct ifbrparam *param = arg;
1728 return (bstp_set_protocol(&sc->sc_stp, param->ifbrp_proto));
1732 bridge_ioctl_stxhc(struct bridge_softc *sc, void *arg)
1734 struct ifbrparam *param = arg;
1736 return (bstp_set_holdcount(&sc->sc_stp, param->ifbrp_txhc));
1742 * Detach an interface from a bridge. Called when a member
1743 * interface is detaching.
1746 bridge_ifdetach(void *arg __unused, struct ifnet *ifp)
1748 struct bridge_softc *sc = ifp->if_bridge;
1749 struct bridge_iflist *bif;
1751 if (ifp->if_flags & IFF_RENAMING)
1754 /* Check if the interface is a bridge member */
1758 bif = bridge_lookup_member_if(sc, ifp);
1760 bridge_delete_member(sc, bif, 1);
1766 /* Check if the interface is a span port */
1767 mtx_lock(&bridge_list_mtx);
1768 LIST_FOREACH(sc, &bridge_list, sc_list) {
1770 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next)
1771 if (ifp == bif->bif_ifp) {
1772 bridge_delete_span(sc, bif);
1778 mtx_unlock(&bridge_list_mtx);
1784 * Initialize a bridge interface.
1787 bridge_init(void *xsc)
1789 struct bridge_softc *sc = (struct bridge_softc *)xsc;
1790 struct ifnet *ifp = sc->sc_ifp;
1792 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
1796 callout_reset(&sc->sc_brcallout, bridge_rtable_prune_period * hz,
1799 ifp->if_drv_flags |= IFF_DRV_RUNNING;
1800 bstp_init(&sc->sc_stp); /* Initialize Spanning Tree */
1808 * Stop the bridge interface.
1811 bridge_stop(struct ifnet *ifp, int disable)
1813 struct bridge_softc *sc = ifp->if_softc;
1815 BRIDGE_LOCK_ASSERT(sc);
1817 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1820 callout_stop(&sc->sc_brcallout);
1821 bstp_stop(&sc->sc_stp);
1823 bridge_rtflush(sc, IFBF_FLUSHDYN);
1825 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
1831 * Enqueue a packet on a bridge member interface.
1835 bridge_enqueue(struct bridge_softc *sc, struct ifnet *dst_ifp, struct mbuf *m)
1841 /* We may be sending a fragment so traverse the mbuf */
1844 m->m_nextpkt = NULL;
1845 len = m->m_pkthdr.len;
1846 mflags = m->m_flags;
1849 * If underlying interface can not do VLAN tag insertion itself
1850 * then attach a packet tag that holds it.
1852 if ((m->m_flags & M_VLANTAG) &&
1853 (dst_ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0) {
1854 m = ether_vlanencap(m, m->m_pkthdr.ether_vtag);
1857 "unable to prepend VLAN header\n");
1858 dst_ifp->if_oerrors++;
1861 m->m_flags &= ~M_VLANTAG;
1864 if ((err = dst_ifp->if_transmit(dst_ifp, m))) {
1866 sc->sc_ifp->if_oerrors++;
1870 sc->sc_ifp->if_opackets++;
1871 sc->sc_ifp->if_obytes += len;
1872 if (mflags & M_MCAST)
1873 sc->sc_ifp->if_omcasts++;
1882 * Receive a queued packet from dummynet and pass it on to the output
1885 * The mbuf has the Ethernet header already attached.
1888 bridge_dummynet(struct mbuf *m, struct ifnet *ifp)
1890 struct bridge_softc *sc;
1892 sc = ifp->if_bridge;
1895 * The packet didnt originate from a member interface. This should only
1896 * ever happen if a member interface is removed while packets are
1904 if (PFIL_HOOKED(&V_inet_pfil_hook)
1906 || PFIL_HOOKED(&V_inet6_pfil_hook)
1909 if (bridge_pfil(&m, sc->sc_ifp, ifp, PFIL_OUT) != 0)
1915 bridge_enqueue(sc, ifp, m);
1921 * Send output from a bridge member interface. This
1922 * performs the bridging function for locally originated
1925 * The mbuf has the Ethernet header already attached. We must
1926 * enqueue or free the mbuf before returning.
1929 bridge_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *sa,
1932 struct ether_header *eh;
1933 struct ifnet *dst_if;
1934 struct bridge_softc *sc;
1937 if (m->m_len < ETHER_HDR_LEN) {
1938 m = m_pullup(m, ETHER_HDR_LEN);
1943 eh = mtod(m, struct ether_header *);
1944 sc = ifp->if_bridge;
1945 vlan = VLANTAGOF(m);
1950 * If bridge is down, but the original output interface is up,
1951 * go ahead and send out that interface. Otherwise, the packet
1954 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
1960 * If the packet is a multicast, or we don't know a better way to
1961 * get there, send to all interfaces.
1963 if (ETHER_IS_MULTICAST(eh->ether_dhost))
1966 dst_if = bridge_rtlookup(sc, eh->ether_dhost, vlan);
1967 if (dst_if == NULL) {
1968 struct bridge_iflist *bif;
1970 int error = 0, used = 0;
1974 BRIDGE_LOCK2REF(sc, error);
1980 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
1981 dst_if = bif->bif_ifp;
1983 if (dst_if->if_type == IFT_GIF)
1985 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
1989 * If this is not the original output interface,
1990 * and the interface is participating in spanning
1991 * tree, make sure the port is in a state that
1992 * allows forwarding.
1994 if (dst_if != ifp && (bif->bif_flags & IFBIF_STP) &&
1995 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
1998 if (LIST_NEXT(bif, bif_next) == NULL) {
2002 mc = m_copypacket(m, M_NOWAIT);
2004 sc->sc_ifp->if_oerrors++;
2009 bridge_enqueue(sc, dst_if, mc);
2019 * XXX Spanning tree consideration here?
2023 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0) {
2030 bridge_enqueue(sc, dst_if, m);
2037 * Do output on a bridge.
2041 bridge_transmit(struct ifnet *ifp, struct mbuf *m)
2043 struct bridge_softc *sc;
2044 struct ether_header *eh;
2045 struct ifnet *dst_if;
2050 ETHER_BPF_MTAP(ifp, m);
2052 eh = mtod(m, struct ether_header *);
2055 if (((m->m_flags & (M_BCAST|M_MCAST)) == 0) &&
2056 (dst_if = bridge_rtlookup(sc, eh->ether_dhost, 1)) != NULL) {
2058 error = bridge_enqueue(sc, dst_if, m);
2060 bridge_broadcast(sc, ifp, m, 0);
2066 * The ifp->if_qflush entry point for if_bridge(4) is no-op.
2069 bridge_qflush(struct ifnet *ifp __unused)
2076 * The forwarding function of the bridge.
2078 * NOTE: Releases the lock on return.
2081 bridge_forward(struct bridge_softc *sc, struct bridge_iflist *sbif,
2084 struct bridge_iflist *dbif;
2085 struct ifnet *src_if, *dst_if, *ifp;
2086 struct ether_header *eh;
2091 src_if = m->m_pkthdr.rcvif;
2095 ifp->if_ibytes += m->m_pkthdr.len;
2096 vlan = VLANTAGOF(m);
2098 if ((sbif->bif_flags & IFBIF_STP) &&
2099 sbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2102 eh = mtod(m, struct ether_header *);
2103 dst = eh->ether_dhost;
2105 /* If the interface is learning, record the address. */
2106 if (sbif->bif_flags & IFBIF_LEARNING) {
2107 error = bridge_rtupdate(sc, eh->ether_shost, vlan,
2108 sbif, 0, IFBAF_DYNAMIC);
2110 * If the interface has addresses limits then deny any source
2111 * that is not in the cache.
2113 if (error && sbif->bif_addrmax)
2117 if ((sbif->bif_flags & IFBIF_STP) != 0 &&
2118 sbif->bif_stp.bp_state == BSTP_IFSTATE_LEARNING)
2122 * At this point, the port either doesn't participate
2123 * in spanning tree or it is in the forwarding state.
2127 * If the packet is unicast, destined for someone on
2128 * "this" side of the bridge, drop it.
2130 if ((m->m_flags & (M_BCAST|M_MCAST)) == 0) {
2131 dst_if = bridge_rtlookup(sc, dst, vlan);
2132 if (src_if == dst_if)
2136 * Check if its a reserved multicast address, any address
2137 * listed in 802.1D section 7.12.6 may not be forwarded by the
2139 * This is currently 01-80-C2-00-00-00 to 01-80-C2-00-00-0F
2141 if (dst[0] == 0x01 && dst[1] == 0x80 &&
2142 dst[2] == 0xc2 && dst[3] == 0x00 &&
2143 dst[4] == 0x00 && dst[5] <= 0x0f)
2146 /* ...forward it to all interfaces. */
2152 * If we have a destination interface which is a member of our bridge,
2153 * OR this is a unicast packet, push it through the bpf(4) machinery.
2154 * For broadcast or multicast packets, don't bother because it will
2155 * be reinjected into ether_input. We do this before we pass the packets
2156 * through the pfil(9) framework, as it is possible that pfil(9) will
2157 * drop the packet, or possibly modify it, making it difficult to debug
2158 * firewall issues on the bridge.
2160 if (dst_if != NULL || (m->m_flags & (M_BCAST | M_MCAST)) == 0)
2161 ETHER_BPF_MTAP(ifp, m);
2163 /* run the packet filter */
2164 if (PFIL_HOOKED(&V_inet_pfil_hook)
2166 || PFIL_HOOKED(&V_inet6_pfil_hook)
2170 if (bridge_pfil(&m, ifp, src_if, PFIL_IN) != 0)
2177 if (dst_if == NULL) {
2178 bridge_broadcast(sc, src_if, m, 1);
2183 * At this point, we're dealing with a unicast frame
2184 * going to a different interface.
2186 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2189 dbif = bridge_lookup_member_if(sc, dst_if);
2191 /* Not a member of the bridge (anymore?) */
2194 /* Private segments can not talk to each other */
2195 if (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE)
2198 if ((dbif->bif_flags & IFBIF_STP) &&
2199 dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2204 if (PFIL_HOOKED(&V_inet_pfil_hook)
2206 || PFIL_HOOKED(&V_inet6_pfil_hook)
2209 if (bridge_pfil(&m, ifp, dst_if, PFIL_OUT) != 0)
2215 bridge_enqueue(sc, dst_if, m);
2226 * Receive input from a member interface. Queue the packet for
2227 * bridging if it is not for us.
2229 static struct mbuf *
2230 bridge_input(struct ifnet *ifp, struct mbuf *m)
2232 struct bridge_softc *sc = ifp->if_bridge;
2233 struct bridge_iflist *bif, *bif2;
2235 struct ether_header *eh;
2236 struct mbuf *mc, *mc2;
2240 if ((sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2244 vlan = VLANTAGOF(m);
2247 * Implement support for bridge monitoring. If this flag has been
2248 * set on this interface, discard the packet once we push it through
2249 * the bpf(4) machinery, but before we do, increment the byte and
2250 * packet counters associated with this interface.
2252 if ((bifp->if_flags & IFF_MONITOR) != 0) {
2253 m->m_pkthdr.rcvif = bifp;
2254 ETHER_BPF_MTAP(bifp, m);
2255 bifp->if_ipackets++;
2256 bifp->if_ibytes += m->m_pkthdr.len;
2261 bif = bridge_lookup_member_if(sc, ifp);
2267 eh = mtod(m, struct ether_header *);
2271 if (m->m_flags & (M_BCAST|M_MCAST)) {
2272 /* Tap off 802.1D packets; they do not get forwarded. */
2273 if (memcmp(eh->ether_dhost, bstp_etheraddr,
2274 ETHER_ADDR_LEN) == 0) {
2275 bstp_input(&bif->bif_stp, ifp, m); /* consumes mbuf */
2280 if ((bif->bif_flags & IFBIF_STP) &&
2281 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
2287 * Make a deep copy of the packet and enqueue the copy
2288 * for bridge processing; return the original packet for
2291 mc = m_dup(m, M_NOWAIT);
2297 /* Perform the bridge forwarding function with the copy. */
2298 bridge_forward(sc, bif, mc);
2301 * Reinject the mbuf as arriving on the bridge so we have a
2302 * chance at claiming multicast packets. We can not loop back
2303 * here from ether_input as a bridge is never a member of a
2306 KASSERT(bifp->if_bridge == NULL,
2307 ("loop created in bridge_input"));
2308 mc2 = m_dup(m, M_NOWAIT);
2310 /* Keep the layer3 header aligned */
2311 int i = min(mc2->m_pkthdr.len, max_protohdr);
2312 mc2 = m_copyup(mc2, i, ETHER_ALIGN);
2315 mc2->m_pkthdr.rcvif = bifp;
2316 (*bifp->if_input)(bifp, mc2);
2319 /* Return the original packet for local processing. */
2323 if ((bif->bif_flags & IFBIF_STP) &&
2324 bif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING) {
2329 #if (defined(INET) || defined(INET6))
2330 # define OR_CARP_CHECK_WE_ARE_DST(iface) \
2331 || ((iface)->if_carp \
2332 && (*carp_forus_p)((iface), eh->ether_dhost))
2333 # define OR_CARP_CHECK_WE_ARE_SRC(iface) \
2334 || ((iface)->if_carp \
2335 && (*carp_forus_p)((iface), eh->ether_shost))
2337 # define OR_CARP_CHECK_WE_ARE_DST(iface)
2338 # define OR_CARP_CHECK_WE_ARE_SRC(iface)
2342 # define OR_PFIL_HOOKED_INET6 \
2343 || PFIL_HOOKED(&V_inet6_pfil_hook)
2345 # define OR_PFIL_HOOKED_INET6
2348 #define GRAB_OUR_PACKETS(iface) \
2349 if ((iface)->if_type == IFT_GIF) \
2351 /* It is destined for us. */ \
2352 if (memcmp(IF_LLADDR((iface)), eh->ether_dhost, ETHER_ADDR_LEN) == 0 \
2353 OR_CARP_CHECK_WE_ARE_DST((iface)) \
2355 if ((iface)->if_type == IFT_BRIDGE) { \
2356 ETHER_BPF_MTAP(iface, m); \
2357 iface->if_ipackets++; \
2358 iface->if_ibytes += m->m_pkthdr.len; \
2359 /* Filter on the physical interface. */ \
2360 if (pfil_local_phys && \
2361 (PFIL_HOOKED(&V_inet_pfil_hook) \
2362 OR_PFIL_HOOKED_INET6)) { \
2363 if (bridge_pfil(&m, NULL, ifp, \
2364 PFIL_IN) != 0 || m == NULL) { \
2365 BRIDGE_UNLOCK(sc); \
2368 eh = mtod(m, struct ether_header *); \
2371 if (bif->bif_flags & IFBIF_LEARNING) { \
2372 error = bridge_rtupdate(sc, eh->ether_shost, \
2373 vlan, bif, 0, IFBAF_DYNAMIC); \
2374 if (error && bif->bif_addrmax) { \
2375 BRIDGE_UNLOCK(sc); \
2380 m->m_pkthdr.rcvif = iface; \
2381 BRIDGE_UNLOCK(sc); \
2385 /* We just received a packet that we sent out. */ \
2386 if (memcmp(IF_LLADDR((iface)), eh->ether_shost, ETHER_ADDR_LEN) == 0 \
2387 OR_CARP_CHECK_WE_ARE_SRC((iface)) \
2389 BRIDGE_UNLOCK(sc); \
2395 * Unicast. Make sure it's not for the bridge.
2397 do { GRAB_OUR_PACKETS(bifp) } while (0);
2400 * Give a chance for ifp at first priority. This will help when the
2401 * packet comes through the interface like VLAN's with the same MACs
2402 * on several interfaces from the same bridge. This also will save
2403 * some CPU cycles in case the destination interface and the input
2404 * interface (eq ifp) are the same.
2406 do { GRAB_OUR_PACKETS(ifp) } while (0);
2408 /* Now check the all bridge members. */
2409 LIST_FOREACH(bif2, &sc->sc_iflist, bif_next) {
2410 GRAB_OUR_PACKETS(bif2->bif_ifp)
2413 #undef OR_CARP_CHECK_WE_ARE_DST
2414 #undef OR_CARP_CHECK_WE_ARE_SRC
2415 #undef OR_PFIL_HOOKED_INET6
2416 #undef GRAB_OUR_PACKETS
2418 /* Perform the bridge forwarding function. */
2419 bridge_forward(sc, bif, m);
2427 * Send a frame to all interfaces that are members of
2428 * the bridge, except for the one on which the packet
2431 * NOTE: Releases the lock on return.
2434 bridge_broadcast(struct bridge_softc *sc, struct ifnet *src_if,
2435 struct mbuf *m, int runfilt)
2437 struct bridge_iflist *dbif, *sbif;
2439 struct ifnet *dst_if;
2440 int error = 0, used = 0, i;
2442 sbif = bridge_lookup_member_if(sc, src_if);
2444 BRIDGE_LOCK2REF(sc, error);
2450 /* Filter on the bridge interface before broadcasting */
2451 if (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
2453 || PFIL_HOOKED(&V_inet6_pfil_hook)
2456 if (bridge_pfil(&m, sc->sc_ifp, NULL, PFIL_OUT) != 0)
2462 LIST_FOREACH(dbif, &sc->sc_iflist, bif_next) {
2463 dst_if = dbif->bif_ifp;
2464 if (dst_if == src_if)
2467 /* Private segments can not talk to each other */
2468 if (sbif && (sbif->bif_flags & dbif->bif_flags & IFBIF_PRIVATE))
2471 if ((dbif->bif_flags & IFBIF_STP) &&
2472 dbif->bif_stp.bp_state == BSTP_IFSTATE_DISCARDING)
2475 if ((dbif->bif_flags & IFBIF_DISCOVER) == 0 &&
2476 (m->m_flags & (M_BCAST|M_MCAST)) == 0)
2479 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2482 if (LIST_NEXT(dbif, bif_next) == NULL) {
2486 mc = m_dup(m, M_NOWAIT);
2488 sc->sc_ifp->if_oerrors++;
2494 * Filter on the output interface. Pass a NULL bridge interface
2495 * pointer so we do not redundantly filter on the bridge for
2496 * each interface we broadcast on.
2498 if (runfilt && (PFIL_HOOKED(&V_inet_pfil_hook)
2500 || PFIL_HOOKED(&V_inet6_pfil_hook)
2504 /* Keep the layer3 header aligned */
2505 i = min(mc->m_pkthdr.len, max_protohdr);
2506 mc = m_copyup(mc, i, ETHER_ALIGN);
2508 sc->sc_ifp->if_oerrors++;
2512 if (bridge_pfil(&mc, NULL, dst_if, PFIL_OUT) != 0)
2518 bridge_enqueue(sc, dst_if, mc);
2530 * Duplicate a packet out one or more interfaces that are in span mode,
2531 * the original mbuf is unmodified.
2534 bridge_span(struct bridge_softc *sc, struct mbuf *m)
2536 struct bridge_iflist *bif;
2537 struct ifnet *dst_if;
2540 if (LIST_EMPTY(&sc->sc_spanlist))
2543 LIST_FOREACH(bif, &sc->sc_spanlist, bif_next) {
2544 dst_if = bif->bif_ifp;
2546 if ((dst_if->if_drv_flags & IFF_DRV_RUNNING) == 0)
2549 mc = m_copypacket(m, M_NOWAIT);
2551 sc->sc_ifp->if_oerrors++;
2555 bridge_enqueue(sc, dst_if, mc);
2562 * Add a bridge routing entry.
2565 bridge_rtupdate(struct bridge_softc *sc, const uint8_t *dst, uint16_t vlan,
2566 struct bridge_iflist *bif, int setflags, uint8_t flags)
2568 struct bridge_rtnode *brt;
2571 BRIDGE_LOCK_ASSERT(sc);
2573 /* Check the source address is valid and not multicast. */
2574 if (ETHER_IS_MULTICAST(dst) ||
2575 (dst[0] == 0 && dst[1] == 0 && dst[2] == 0 &&
2576 dst[3] == 0 && dst[4] == 0 && dst[5] == 0) != 0)
2579 /* 802.1p frames map to vlan 1 */
2584 * A route for this destination might already exist. If so,
2585 * update it, otherwise create a new one.
2587 if ((brt = bridge_rtnode_lookup(sc, dst, vlan)) == NULL) {
2588 if (sc->sc_brtcnt >= sc->sc_brtmax) {
2589 sc->sc_brtexceeded++;
2592 /* Check per interface address limits (if enabled) */
2593 if (bif->bif_addrmax && bif->bif_addrcnt >= bif->bif_addrmax) {
2594 bif->bif_addrexceeded++;
2599 * Allocate a new bridge forwarding node, and
2600 * initialize the expiration time and Ethernet
2603 brt = uma_zalloc(bridge_rtnode_zone, M_NOWAIT | M_ZERO);
2607 if (bif->bif_flags & IFBIF_STICKY)
2608 brt->brt_flags = IFBAF_STICKY;
2610 brt->brt_flags = IFBAF_DYNAMIC;
2612 memcpy(brt->brt_addr, dst, ETHER_ADDR_LEN);
2613 brt->brt_vlan = vlan;
2615 if ((error = bridge_rtnode_insert(sc, brt)) != 0) {
2616 uma_zfree(bridge_rtnode_zone, brt);
2623 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC &&
2624 brt->brt_dst != bif) {
2625 brt->brt_dst->bif_addrcnt--;
2627 brt->brt_dst->bif_addrcnt++;
2630 if ((flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2631 brt->brt_expire = time_uptime + sc->sc_brttimeout;
2633 brt->brt_flags = flags;
2641 * Lookup the destination interface for an address.
2643 static struct ifnet *
2644 bridge_rtlookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2646 struct bridge_rtnode *brt;
2648 BRIDGE_LOCK_ASSERT(sc);
2650 if ((brt = bridge_rtnode_lookup(sc, addr, vlan)) == NULL)
2653 return (brt->brt_ifp);
2659 * Trim the routine table so that we have a number
2660 * of routing entries less than or equal to the
2664 bridge_rttrim(struct bridge_softc *sc)
2666 struct bridge_rtnode *brt, *nbrt;
2668 BRIDGE_LOCK_ASSERT(sc);
2670 /* Make sure we actually need to do this. */
2671 if (sc->sc_brtcnt <= sc->sc_brtmax)
2674 /* Force an aging cycle; this might trim enough addresses. */
2676 if (sc->sc_brtcnt <= sc->sc_brtmax)
2679 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2680 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2681 bridge_rtnode_destroy(sc, brt);
2682 if (sc->sc_brtcnt <= sc->sc_brtmax)
2691 * Aging timer for the bridge.
2694 bridge_timer(void *arg)
2696 struct bridge_softc *sc = arg;
2698 BRIDGE_LOCK_ASSERT(sc);
2702 if (sc->sc_ifp->if_drv_flags & IFF_DRV_RUNNING)
2703 callout_reset(&sc->sc_brcallout,
2704 bridge_rtable_prune_period * hz, bridge_timer, sc);
2710 * Perform an aging cycle.
2713 bridge_rtage(struct bridge_softc *sc)
2715 struct bridge_rtnode *brt, *nbrt;
2717 BRIDGE_LOCK_ASSERT(sc);
2719 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2720 if ((brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC) {
2721 if (time_uptime >= brt->brt_expire)
2722 bridge_rtnode_destroy(sc, brt);
2730 * Remove all dynamic addresses from the bridge.
2733 bridge_rtflush(struct bridge_softc *sc, int full)
2735 struct bridge_rtnode *brt, *nbrt;
2737 BRIDGE_LOCK_ASSERT(sc);
2739 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2740 if (full || (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2741 bridge_rtnode_destroy(sc, brt);
2748 * Remove an address from the table.
2751 bridge_rtdaddr(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2753 struct bridge_rtnode *brt;
2756 BRIDGE_LOCK_ASSERT(sc);
2759 * If vlan is zero then we want to delete for all vlans so the lookup
2760 * may return more than one.
2762 while ((brt = bridge_rtnode_lookup(sc, addr, vlan)) != NULL) {
2763 bridge_rtnode_destroy(sc, brt);
2767 return (found ? 0 : ENOENT);
2773 * Delete routes to a speicifc member interface.
2776 bridge_rtdelete(struct bridge_softc *sc, struct ifnet *ifp, int full)
2778 struct bridge_rtnode *brt, *nbrt;
2780 BRIDGE_LOCK_ASSERT(sc);
2782 LIST_FOREACH_SAFE(brt, &sc->sc_rtlist, brt_list, nbrt) {
2783 if (brt->brt_ifp == ifp && (full ||
2784 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC))
2785 bridge_rtnode_destroy(sc, brt);
2790 * bridge_rtable_init:
2792 * Initialize the route table for this bridge.
2795 bridge_rtable_init(struct bridge_softc *sc)
2799 sc->sc_rthash = malloc(sizeof(*sc->sc_rthash) * BRIDGE_RTHASH_SIZE,
2800 M_DEVBUF, M_WAITOK);
2802 for (i = 0; i < BRIDGE_RTHASH_SIZE; i++)
2803 LIST_INIT(&sc->sc_rthash[i]);
2805 sc->sc_rthash_key = arc4random();
2806 LIST_INIT(&sc->sc_rtlist);
2810 * bridge_rtable_fini:
2812 * Deconstruct the route table for this bridge.
2815 bridge_rtable_fini(struct bridge_softc *sc)
2818 KASSERT(sc->sc_brtcnt == 0,
2819 ("%s: %d bridge routes referenced", __func__, sc->sc_brtcnt));
2820 free(sc->sc_rthash, M_DEVBUF);
2824 * The following hash function is adapted from "Hash Functions" by Bob Jenkins
2825 * ("Algorithm Alley", Dr. Dobbs Journal, September 1997).
2827 #define mix(a, b, c) \
2829 a -= b; a -= c; a ^= (c >> 13); \
2830 b -= c; b -= a; b ^= (a << 8); \
2831 c -= a; c -= b; c ^= (b >> 13); \
2832 a -= b; a -= c; a ^= (c >> 12); \
2833 b -= c; b -= a; b ^= (a << 16); \
2834 c -= a; c -= b; c ^= (b >> 5); \
2835 a -= b; a -= c; a ^= (c >> 3); \
2836 b -= c; b -= a; b ^= (a << 10); \
2837 c -= a; c -= b; c ^= (b >> 15); \
2838 } while (/*CONSTCOND*/0)
2840 static __inline uint32_t
2841 bridge_rthash(struct bridge_softc *sc, const uint8_t *addr)
2843 uint32_t a = 0x9e3779b9, b = 0x9e3779b9, c = sc->sc_rthash_key;
2854 return (c & BRIDGE_RTHASH_MASK);
2860 bridge_rtnode_addr_cmp(const uint8_t *a, const uint8_t *b)
2864 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
2865 d = ((int)a[i]) - ((int)b[i]);
2872 * bridge_rtnode_lookup:
2874 * Look up a bridge route node for the specified destination. Compare the
2875 * vlan id or if zero then just return the first match.
2877 static struct bridge_rtnode *
2878 bridge_rtnode_lookup(struct bridge_softc *sc, const uint8_t *addr, uint16_t vlan)
2880 struct bridge_rtnode *brt;
2884 BRIDGE_LOCK_ASSERT(sc);
2886 hash = bridge_rthash(sc, addr);
2887 LIST_FOREACH(brt, &sc->sc_rthash[hash], brt_hash) {
2888 dir = bridge_rtnode_addr_cmp(addr, brt->brt_addr);
2889 if (dir == 0 && (brt->brt_vlan == vlan || vlan == 0))
2899 * bridge_rtnode_insert:
2901 * Insert the specified bridge node into the route table. We
2902 * assume the entry is not already in the table.
2905 bridge_rtnode_insert(struct bridge_softc *sc, struct bridge_rtnode *brt)
2907 struct bridge_rtnode *lbrt;
2911 BRIDGE_LOCK_ASSERT(sc);
2913 hash = bridge_rthash(sc, brt->brt_addr);
2915 lbrt = LIST_FIRST(&sc->sc_rthash[hash]);
2917 LIST_INSERT_HEAD(&sc->sc_rthash[hash], brt, brt_hash);
2922 dir = bridge_rtnode_addr_cmp(brt->brt_addr, lbrt->brt_addr);
2923 if (dir == 0 && brt->brt_vlan == lbrt->brt_vlan)
2926 LIST_INSERT_BEFORE(lbrt, brt, brt_hash);
2929 if (LIST_NEXT(lbrt, brt_hash) == NULL) {
2930 LIST_INSERT_AFTER(lbrt, brt, brt_hash);
2933 lbrt = LIST_NEXT(lbrt, brt_hash);
2934 } while (lbrt != NULL);
2937 panic("bridge_rtnode_insert: impossible");
2941 LIST_INSERT_HEAD(&sc->sc_rtlist, brt, brt_list);
2948 * bridge_rtnode_destroy:
2950 * Destroy a bridge rtnode.
2953 bridge_rtnode_destroy(struct bridge_softc *sc, struct bridge_rtnode *brt)
2955 BRIDGE_LOCK_ASSERT(sc);
2957 LIST_REMOVE(brt, brt_hash);
2959 LIST_REMOVE(brt, brt_list);
2961 brt->brt_dst->bif_addrcnt--;
2962 uma_zfree(bridge_rtnode_zone, brt);
2966 * bridge_rtable_expire:
2968 * Set the expiry time for all routes on an interface.
2971 bridge_rtable_expire(struct ifnet *ifp, int age)
2973 struct bridge_softc *sc = ifp->if_bridge;
2974 struct bridge_rtnode *brt;
2979 * If the age is zero then flush, otherwise set all the expiry times to
2980 * age for the interface
2983 bridge_rtdelete(sc, ifp, IFBF_FLUSHDYN);
2985 LIST_FOREACH(brt, &sc->sc_rtlist, brt_list) {
2986 /* Cap the expiry time to 'age' */
2987 if (brt->brt_ifp == ifp &&
2988 brt->brt_expire > time_uptime + age &&
2989 (brt->brt_flags & IFBAF_TYPEMASK) == IFBAF_DYNAMIC)
2990 brt->brt_expire = time_uptime + age;
2997 * bridge_state_change:
2999 * Callback from the bridgestp code when a port changes states.
3002 bridge_state_change(struct ifnet *ifp, int state)
3004 struct bridge_softc *sc = ifp->if_bridge;
3005 static const char *stpstates[] = {
3015 log(LOG_NOTICE, "%s: state changed to %s on %s\n",
3016 sc->sc_ifp->if_xname, stpstates[state], ifp->if_xname);
3020 * Send bridge packets through pfil if they are one of the types pfil can deal
3021 * with, or if they are ARP or REVARP. (pfil will pass ARP and REVARP without
3022 * question.) If *bifp or *ifp are NULL then packet filtering is skipped for
3026 bridge_pfil(struct mbuf **mp, struct ifnet *bifp, struct ifnet *ifp, int dir)
3028 int snap, error, i, hlen;
3029 struct ether_header *eh1, eh2;
3032 u_int16_t ether_type;
3035 error = -1; /* Default error if not error == 0 */
3038 /* we may return with the IP fields swapped, ensure its not shared */
3039 KASSERT(M_WRITABLE(*mp), ("%s: modifying a shared mbuf", __func__));
3042 if (pfil_bridge == 0 && pfil_member == 0 && pfil_ipfw == 0)
3043 return (0); /* filtering is disabled */
3045 i = min((*mp)->m_pkthdr.len, max_protohdr);
3046 if ((*mp)->m_len < i) {
3047 *mp = m_pullup(*mp, i);
3049 printf("%s: m_pullup failed\n", __func__);
3054 eh1 = mtod(*mp, struct ether_header *);
3055 ether_type = ntohs(eh1->ether_type);
3058 * Check for SNAP/LLC.
3060 if (ether_type < ETHERMTU) {
3061 struct llc *llc2 = (struct llc *)(eh1 + 1);
3063 if ((*mp)->m_len >= ETHER_HDR_LEN + 8 &&
3064 llc2->llc_dsap == LLC_SNAP_LSAP &&
3065 llc2->llc_ssap == LLC_SNAP_LSAP &&
3066 llc2->llc_control == LLC_UI) {
3067 ether_type = htons(llc2->llc_un.type_snap.ether_type);
3073 * If we're trying to filter bridge traffic, don't look at anything
3074 * other than IP and ARP traffic. If the filter doesn't understand
3075 * IPv6, don't allow IPv6 through the bridge either. This is lame
3076 * since if we really wanted, say, an AppleTalk filter, we are hosed,
3077 * but of course we don't have an AppleTalk filter to begin with.
3078 * (Note that since pfil doesn't understand ARP it will pass *ALL*
3081 switch (ether_type) {
3083 case ETHERTYPE_REVARP:
3084 if (pfil_ipfw_arp == 0)
3085 return (0); /* Automatically pass */
3090 case ETHERTYPE_IPV6:
3095 * Check to see if the user wants to pass non-ip
3096 * packets, these will not be checked by pfil(9) and
3097 * passed unconditionally so the default is to drop.
3103 /* Run the packet through pfil before stripping link headers */
3104 if (PFIL_HOOKED(&V_link_pfil_hook) && pfil_ipfw != 0 &&
3105 dir == PFIL_OUT && ifp != NULL) {
3107 error = pfil_run_hooks(&V_link_pfil_hook, mp, ifp, dir, NULL);
3109 if (*mp == NULL || error != 0) /* packet consumed by filter */
3113 /* Strip off the Ethernet header and keep a copy. */
3114 m_copydata(*mp, 0, ETHER_HDR_LEN, (caddr_t) &eh2);
3115 m_adj(*mp, ETHER_HDR_LEN);
3117 /* Strip off snap header, if present */
3119 m_copydata(*mp, 0, sizeof(struct llc), (caddr_t) &llc1);
3120 m_adj(*mp, sizeof(struct llc));
3124 * Check the IP header for alignment and errors
3126 if (dir == PFIL_IN) {
3127 switch (ether_type) {
3129 error = bridge_ip_checkbasic(mp);
3132 case ETHERTYPE_IPV6:
3133 error = bridge_ip6_checkbasic(mp);
3146 * Run the packet through pfil
3148 switch (ether_type) {
3151 * Run pfil on the member interface and the bridge, both can
3152 * be skipped by clearing pfil_member or pfil_bridge.
3155 * in_if -> bridge_if -> out_if
3157 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3158 error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
3161 if (*mp == NULL || error != 0) /* filter may consume */
3164 if (pfil_member && ifp != NULL)
3165 error = pfil_run_hooks(&V_inet_pfil_hook, mp, ifp,
3168 if (*mp == NULL || error != 0) /* filter may consume */
3171 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
3172 error = pfil_run_hooks(&V_inet_pfil_hook, mp, bifp,
3175 if (*mp == NULL || error != 0) /* filter may consume */
3178 /* check if we need to fragment the packet */
3179 if (pfil_member && ifp != NULL && dir == PFIL_OUT) {
3180 i = (*mp)->m_pkthdr.len;
3181 if (i > ifp->if_mtu) {
3182 error = bridge_fragment(ifp, *mp, &eh2, snap,
3188 /* Recalculate the ip checksum. */
3189 ip = mtod(*mp, struct ip *);
3190 hlen = ip->ip_hl << 2;
3191 if (hlen < sizeof(struct ip))
3193 if (hlen > (*mp)->m_len) {
3194 if ((*mp = m_pullup(*mp, hlen)) == 0)
3196 ip = mtod(*mp, struct ip *);
3201 if (hlen == sizeof(struct ip))
3202 ip->ip_sum = in_cksum_hdr(ip);
3204 ip->ip_sum = in_cksum(*mp, hlen);
3208 case ETHERTYPE_IPV6:
3209 if (pfil_bridge && dir == PFIL_OUT && bifp != NULL)
3210 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, bifp,
3213 if (*mp == NULL || error != 0) /* filter may consume */
3216 if (pfil_member && ifp != NULL)
3217 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, ifp,
3220 if (*mp == NULL || error != 0) /* filter may consume */
3223 if (pfil_bridge && dir == PFIL_IN && bifp != NULL)
3224 error = pfil_run_hooks(&V_inet6_pfil_hook, mp, bifp,
3241 * Finally, put everything back the way it was and return
3244 M_PREPEND(*mp, sizeof(struct llc), M_NOWAIT);
3247 bcopy(&llc1, mtod(*mp, caddr_t), sizeof(struct llc));
3250 M_PREPEND(*mp, ETHER_HDR_LEN, M_NOWAIT);
3253 bcopy(&eh2, mtod(*mp, caddr_t), ETHER_HDR_LEN);
3264 * Perform basic checks on header size since
3265 * pfil assumes ip_input has already processed
3266 * it for it. Cut-and-pasted from ip_input.c.
3267 * Given how simple the IPv6 version is,
3268 * does the IPv4 version really need to be
3271 * XXX Should we update ipstat here, or not?
3272 * XXX Right now we update ipstat but not
3276 bridge_ip_checkbasic(struct mbuf **mp)
3278 struct mbuf *m = *mp;
3286 if (IP_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3287 if ((m = m_copyup(m, sizeof(struct ip),
3288 (max_linkhdr + 3) & ~3)) == NULL) {
3289 /* XXXJRT new stat, please */
3290 KMOD_IPSTAT_INC(ips_toosmall);
3293 } else if (__predict_false(m->m_len < sizeof (struct ip))) {
3294 if ((m = m_pullup(m, sizeof (struct ip))) == NULL) {
3295 KMOD_IPSTAT_INC(ips_toosmall);
3299 ip = mtod(m, struct ip *);
3300 if (ip == NULL) goto bad;
3302 if (ip->ip_v != IPVERSION) {
3303 KMOD_IPSTAT_INC(ips_badvers);
3306 hlen = ip->ip_hl << 2;
3307 if (hlen < sizeof(struct ip)) { /* minimum header length */
3308 KMOD_IPSTAT_INC(ips_badhlen);
3311 if (hlen > m->m_len) {
3312 if ((m = m_pullup(m, hlen)) == 0) {
3313 KMOD_IPSTAT_INC(ips_badhlen);
3316 ip = mtod(m, struct ip *);
3317 if (ip == NULL) goto bad;
3320 if (m->m_pkthdr.csum_flags & CSUM_IP_CHECKED) {
3321 sum = !(m->m_pkthdr.csum_flags & CSUM_IP_VALID);
3323 if (hlen == sizeof(struct ip)) {
3324 sum = in_cksum_hdr(ip);
3326 sum = in_cksum(m, hlen);
3330 KMOD_IPSTAT_INC(ips_badsum);
3334 /* Retrieve the packet length. */
3335 len = ntohs(ip->ip_len);
3338 * Check for additional length bogosity
3341 KMOD_IPSTAT_INC(ips_badlen);
3346 * Check that the amount of data in the buffers
3347 * is as at least much as the IP header would have us expect.
3348 * Drop packet if shorter than we expect.
3350 if (m->m_pkthdr.len < len) {
3351 KMOD_IPSTAT_INC(ips_tooshort);
3355 /* Checks out, proceed */
3366 * Same as above, but for IPv6.
3367 * Cut-and-pasted from ip6_input.c.
3368 * XXX Should we update ip6stat, or not?
3371 bridge_ip6_checkbasic(struct mbuf **mp)
3373 struct mbuf *m = *mp;
3374 struct ip6_hdr *ip6;
3377 * If the IPv6 header is not aligned, slurp it up into a new
3378 * mbuf with space for link headers, in the event we forward
3379 * it. Otherwise, if it is aligned, make sure the entire base
3380 * IPv6 header is in the first mbuf of the chain.
3382 if (IP6_HDR_ALIGNED_P(mtod(m, caddr_t)) == 0) {
3383 struct ifnet *inifp = m->m_pkthdr.rcvif;
3384 if ((m = m_copyup(m, sizeof(struct ip6_hdr),
3385 (max_linkhdr + 3) & ~3)) == NULL) {
3386 /* XXXJRT new stat, please */
3387 IP6STAT_INC(ip6s_toosmall);
3388 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3391 } else if (__predict_false(m->m_len < sizeof(struct ip6_hdr))) {
3392 struct ifnet *inifp = m->m_pkthdr.rcvif;
3393 if ((m = m_pullup(m, sizeof(struct ip6_hdr))) == NULL) {
3394 IP6STAT_INC(ip6s_toosmall);
3395 in6_ifstat_inc(inifp, ifs6_in_hdrerr);
3400 ip6 = mtod(m, struct ip6_hdr *);
3402 if ((ip6->ip6_vfc & IPV6_VERSION_MASK) != IPV6_VERSION) {
3403 IP6STAT_INC(ip6s_badvers);
3404 in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_hdrerr);
3408 /* Checks out, proceed */
3421 * Return a fragmented mbuf chain.
3424 bridge_fragment(struct ifnet *ifp, struct mbuf *m, struct ether_header *eh,
3425 int snap, struct llc *llc)
3431 if (m->m_len < sizeof(struct ip) &&
3432 (m = m_pullup(m, sizeof(struct ip))) == NULL)
3434 ip = mtod(m, struct ip *);
3436 m->m_pkthdr.csum_flags |= CSUM_IP;
3437 error = ip_fragment(ip, &m, ifp->if_mtu, ifp->if_hwassist);
3441 /* walk the chain and re-add the Ethernet header */
3442 for (m0 = m; m0; m0 = m0->m_nextpkt) {
3445 M_PREPEND(m0, sizeof(struct llc), M_NOWAIT);
3450 bcopy(llc, mtod(m0, caddr_t),
3451 sizeof(struct llc));
3453 M_PREPEND(m0, ETHER_HDR_LEN, M_NOWAIT);
3458 bcopy(eh, mtod(m0, caddr_t), ETHER_HDR_LEN);
3464 KMOD_IPSTAT_INC(ips_fragmented);
3475 bridge_linkstate(struct ifnet *ifp)
3477 struct bridge_softc *sc = ifp->if_bridge;
3478 struct bridge_iflist *bif;
3481 bif = bridge_lookup_member_if(sc, ifp);
3486 bridge_linkcheck(sc);
3489 bstp_linkstate(&bif->bif_stp);
3493 bridge_linkcheck(struct bridge_softc *sc)
3495 struct bridge_iflist *bif;
3496 int new_link, hasls;
3498 BRIDGE_LOCK_ASSERT(sc);
3499 new_link = LINK_STATE_DOWN;
3501 /* Our link is considered up if at least one of our ports is active */
3502 LIST_FOREACH(bif, &sc->sc_iflist, bif_next) {
3503 if (bif->bif_ifp->if_capabilities & IFCAP_LINKSTATE)
3505 if (bif->bif_ifp->if_link_state == LINK_STATE_UP) {
3506 new_link = LINK_STATE_UP;
3510 if (!LIST_EMPTY(&sc->sc_iflist) && !hasls) {
3511 /* If no interfaces support link-state then we default to up */
3512 new_link = LINK_STATE_UP;
3514 if_link_state_change(sc->sc_ifp, new_link);