2 * Copyright (c) 2000 Jason L. Wright (jason@thought.net)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by Jason L. Wright
16 * 4. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
21 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
22 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
23 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
24 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
25 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
27 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
28 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
31 * $OpenBSD: bridgestp.c,v 1.5 2001/03/22 03:48:29 jason Exp $
32 * $NetBSD: bridgestp.c,v 1.5 2003/11/28 08:56:48 keihan Exp $
33 * $FreeBSD: src/sys/net/bridgestp.c,v 1.7 2005/10/11 02:58:32 thompsa Exp $
37 * Implementation of the spanning tree protocol as defined in
38 * ISO/IEC Final DIS 15802-3 (IEEE P802.1D/D17), May 25, 1998.
39 * (In English: IEEE 802.1D, Draft 17, 1998)
42 #include <sys/param.h>
43 #include <sys/systm.h>
45 #include <sys/socket.h>
46 #include <sys/sockio.h>
47 #include <sys/kernel.h>
48 #include <sys/callout.h>
51 #include <sys/thread.h>
52 #include <sys/thread2.h>
53 #include <sys/msgport2.h>
56 #include <net/if_dl.h>
57 #include <net/if_types.h>
58 #include <net/if_llc.h>
59 #include <net/if_media.h>
61 #include <netinet/in.h>
62 #include <netinet/in_systm.h>
63 #include <netinet/in_var.h>
64 #include <netinet/if_ether.h>
65 #include <net/bridge/if_bridgevar.h>
67 /* BPDU message types */
68 #define BSTP_MSGTYPE_CFG 0x00 /* Configuration */
69 #define BSTP_MSGTYPE_TCN 0x80 /* Topology chg notification */
72 #define BSTP_FLAG_TC 0x01 /* Topology change */
73 #define BSTP_FLAG_TCA 0x80 /* Topology change ack */
75 #define BSTP_MESSAGE_AGE_INCR (1 * 256) /* in 256ths of a second */
76 #define BSTP_TICK_VAL (1 * 256) /* in 256ths of a second */
79 * Because BPDU's do not make nicely aligned structures, two different
80 * declarations are used: bstp_?bpdu (wire representation, packed) and
81 * bstp_*_unit (internal, nicely aligned version).
84 /* configuration bridge protocol data unit */
86 uint8_t cbu_dsap; /* LLC: destination sap */
87 uint8_t cbu_ssap; /* LLC: source sap */
88 uint8_t cbu_ctl; /* LLC: control */
89 uint16_t cbu_protoid; /* protocol id */
90 uint8_t cbu_protover; /* protocol version */
91 uint8_t cbu_bpdutype; /* message type */
92 uint8_t cbu_flags; /* flags (below) */
95 uint16_t cbu_rootpri; /* root priority */
96 uint8_t cbu_rootaddr[6]; /* root address */
98 uint32_t cbu_rootpathcost; /* root path cost */
101 uint16_t cbu_bridgepri; /* bridge priority */
102 uint8_t cbu_bridgeaddr[6]; /* bridge address */
104 uint16_t cbu_portid; /* port id */
105 uint16_t cbu_messageage; /* current message age */
106 uint16_t cbu_maxage; /* maximum age */
107 uint16_t cbu_hellotime; /* hello time */
108 uint16_t cbu_forwarddelay; /* forwarding delay */
109 } __attribute__((__packed__));
111 /* topology change notification bridge protocol data unit */
113 uint8_t tbu_dsap; /* LLC: destination sap */
114 uint8_t tbu_ssap; /* LLC: source sap */
115 uint8_t tbu_ctl; /* LLC: control */
116 uint16_t tbu_protoid; /* protocol id */
117 uint8_t tbu_protover; /* protocol version */
118 uint8_t tbu_bpdutype; /* message type */
119 } __attribute__((__packed__));
121 const uint8_t bstp_etheraddr[] = { 0x01, 0x80, 0xc2, 0x00, 0x00, 0x00 };
123 static void bstp_initialize_port(struct bridge_softc *,
124 struct bridge_iflist *);
125 static void bstp_ifupdstatus(struct bridge_softc *, struct bridge_iflist *);
126 static void bstp_enable_port(struct bridge_softc *, struct bridge_iflist *);
127 static void bstp_disable_port(struct bridge_softc *,
128 struct bridge_iflist *);
130 static void bstp_enable_change_detection(struct bridge_iflist *);
131 static void bstp_disable_change_detection(struct bridge_iflist *);
133 static int bstp_root_bridge(struct bridge_softc *sc);
134 static void bstp_transmit_config(struct bridge_softc *,
135 struct bridge_iflist *);
136 static void bstp_transmit_tcn(struct bridge_softc *);
137 static void bstp_received_config_bpdu(struct bridge_softc *,
138 struct bridge_iflist *, struct bstp_config_unit *);
139 static void bstp_received_tcn_bpdu(struct bridge_softc *,
140 struct bridge_iflist *, struct bstp_tcn_unit *);
141 static void bstp_record_config_information(struct bridge_softc *,
142 struct bridge_iflist *, struct bstp_config_unit *);
143 static void bstp_record_config_timeout_values(struct bridge_softc *,
144 struct bstp_config_unit *);
145 static void bstp_config_bpdu_generation(struct bridge_softc *);
146 static void bstp_send_config_bpdu(struct bridge_softc *,
147 struct bridge_iflist *, struct bstp_config_unit *);
148 static void bstp_configuration_update(struct bridge_softc *);
149 static void bstp_port_state_selection(struct bridge_softc *);
150 static void bstp_clear_peer_info(struct bridge_softc *,
151 struct bridge_iflist *);
152 static void bstp_make_forwarding(struct bridge_softc *,
153 struct bridge_iflist *);
154 static void bstp_make_blocking(struct bridge_softc *,
155 struct bridge_iflist *);
156 static void bstp_make_l1blocking(struct bridge_softc *sc,
157 struct bridge_iflist *bif);
158 static void bstp_adjust_bonded_states(struct bridge_softc *sc,
159 struct bridge_iflist *obif);
160 static void bstp_set_port_state(struct bridge_iflist *, uint8_t);
162 static void bstp_set_bridge_priority(struct bridge_softc *, uint64_t);
163 static void bstp_set_port_priority(struct bridge_softc *,
164 struct bridge_iflist *, uint16_t);
165 static void bstp_set_path_cost(struct bridge_softc *,
166 struct bridge_iflist *, uint32_t);
168 static void bstp_topology_change_detection(struct bridge_softc *);
169 static void bstp_topology_change_acknowledged(struct bridge_softc *);
170 static void bstp_acknowledge_topology_change(struct bridge_softc *,
171 struct bridge_iflist *);
173 static void bstp_tick(void *);
174 static void bstp_timer_start(struct bridge_timer *, uint16_t);
175 static void bstp_timer_stop(struct bridge_timer *);
176 static int bstp_timer_expired(struct bridge_timer *, uint16_t);
178 static void bstp_hold_timer_expiry(struct bridge_softc *,
179 struct bridge_iflist *);
180 static void bstp_message_age_timer_expiry(struct bridge_softc *,
181 struct bridge_iflist *);
182 static void bstp_forward_delay_timer_expiry(struct bridge_softc *,
183 struct bridge_iflist *);
184 static void bstp_topology_change_timer_expiry(struct bridge_softc *);
185 static void bstp_tcn_timer_expiry(struct bridge_softc *);
186 static void bstp_hello_timer_expiry(struct bridge_softc *);
187 static int bstp_addr_cmp(const uint8_t *, const uint8_t *);
190 * When transmitting a config we tack on our path cost to
191 * our aggregated path-to-root cost.
194 bstp_transmit_config(struct bridge_softc *sc, struct bridge_iflist *bif)
196 if (bif->bif_hold_timer.active) {
197 bif->bif_config_pending = 1;
201 bif->bif_config_bpdu.cu_message_type = BSTP_MSGTYPE_CFG;
202 bif->bif_config_bpdu.cu_rootid = sc->sc_designated_root;
203 bif->bif_config_bpdu.cu_root_path_cost = sc->sc_designated_cost +
205 bif->bif_config_bpdu.cu_bridge_id = sc->sc_bridge_id;
206 bif->bif_config_bpdu.cu_port_id = bif->bif_port_id;
208 if (bstp_root_bridge(sc)) {
209 bif->bif_config_bpdu.cu_message_age = 0;
210 } else if (sc->sc_root_port) {
211 bif->bif_config_bpdu.cu_message_age =
212 sc->sc_root_port->bif_message_age_timer.value +
213 BSTP_MESSAGE_AGE_INCR;
215 bif->bif_config_bpdu.cu_message_age = BSTP_MESSAGE_AGE_INCR;
218 bif->bif_config_bpdu.cu_max_age = sc->sc_max_age;
219 bif->bif_config_bpdu.cu_hello_time = sc->sc_hello_time;
220 bif->bif_config_bpdu.cu_forward_delay = sc->sc_forward_delay;
221 bif->bif_config_bpdu.cu_topology_change_acknowledgment
222 = bif->bif_topology_change_acknowledge;
223 bif->bif_config_bpdu.cu_topology_change = sc->sc_topology_change;
225 if (bif->bif_config_bpdu.cu_message_age < sc->sc_max_age ||
226 (sc->sc_ifp->if_flags & IFF_LINK1)) {
227 bif->bif_topology_change_acknowledge = 0;
228 bif->bif_config_pending = 0;
229 bstp_send_config_bpdu(sc, bif, &bif->bif_config_bpdu);
230 bstp_timer_start(&bif->bif_hold_timer, 0);
235 bstp_send_config_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
236 struct bstp_config_unit *cu)
240 struct ether_header *eh;
241 struct bstp_cbpdu bpdu;
245 if ((ifp->if_flags & IFF_RUNNING) == 0)
248 MGETHDR(m, MB_DONTWAIT, MT_DATA);
252 eh = mtod(m, struct ether_header *);
254 m->m_pkthdr.rcvif = ifp;
255 m->m_pkthdr.len = sizeof(*eh) + sizeof(bpdu);
256 m->m_len = m->m_pkthdr.len;
258 bpdu.cbu_ssap = bpdu.cbu_dsap = LLC_8021D_LSAP;
259 bpdu.cbu_ctl = LLC_UI;
260 bpdu.cbu_protoid = htons(0);
261 bpdu.cbu_protover = 0;
262 bpdu.cbu_bpdutype = cu->cu_message_type;
263 bpdu.cbu_flags = (cu->cu_topology_change ? BSTP_FLAG_TC : 0) |
264 (cu->cu_topology_change_acknowledgment ? BSTP_FLAG_TCA : 0);
266 bpdu.cbu_rootpri = htons(cu->cu_rootid >> 48);
267 bpdu.cbu_rootaddr[0] = cu->cu_rootid >> 40;
268 bpdu.cbu_rootaddr[1] = cu->cu_rootid >> 32;
269 bpdu.cbu_rootaddr[2] = cu->cu_rootid >> 24;
270 bpdu.cbu_rootaddr[3] = cu->cu_rootid >> 16;
271 bpdu.cbu_rootaddr[4] = cu->cu_rootid >> 8;
272 bpdu.cbu_rootaddr[5] = cu->cu_rootid >> 0;
274 bpdu.cbu_rootpathcost = htonl(cu->cu_root_path_cost);
276 bpdu.cbu_bridgepri = htons(cu->cu_bridge_id >> 48);
277 bpdu.cbu_bridgeaddr[0] = cu->cu_bridge_id >> 40;
278 bpdu.cbu_bridgeaddr[1] = cu->cu_bridge_id >> 32;
279 bpdu.cbu_bridgeaddr[2] = cu->cu_bridge_id >> 24;
280 bpdu.cbu_bridgeaddr[3] = cu->cu_bridge_id >> 16;
281 bpdu.cbu_bridgeaddr[4] = cu->cu_bridge_id >> 8;
282 bpdu.cbu_bridgeaddr[5] = cu->cu_bridge_id >> 0;
284 bpdu.cbu_portid = htons(cu->cu_port_id);
285 bpdu.cbu_messageage = htons(cu->cu_message_age);
286 bpdu.cbu_maxage = htons(cu->cu_max_age);
287 bpdu.cbu_hellotime = htons(cu->cu_hello_time);
288 bpdu.cbu_forwarddelay = htons(cu->cu_forward_delay);
291 * Packets sent from the bridge always use the bridge MAC
294 memcpy(eh->ether_shost, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
295 memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
296 eh->ether_type = htons(sizeof(bpdu));
298 memcpy(mtod(m, caddr_t) + sizeof(*eh), &bpdu, sizeof(bpdu));
300 bridge_enqueue(ifp, m);
304 bstp_root_bridge(struct bridge_softc *sc)
306 return (sc->sc_designated_root == sc->sc_bridge_id);
310 * Returns TRUE if the recorded information from our peer has a shorter
311 * graph distance than our current best.
314 bstp_supersedes_port_info(struct bridge_softc *sc, struct bridge_iflist *bif)
316 if (bif->bif_peer_root < sc->sc_designated_root)
318 if (bif->bif_peer_root > sc->sc_designated_root)
322 * Both bif_peer_cost and sc_designated_cost have NOT added in
323 * bif->bif_path_cost, so we can optimize it out.
325 if (bif->bif_peer_cost < sc->sc_designated_cost)
327 if (bif->bif_peer_cost > sc->sc_designated_cost)
330 if (bif->bif_peer_bridge < sc->sc_designated_bridge)
332 if (bif->bif_peer_bridge > sc->sc_designated_bridge)
335 /* bridge_id or bridge+port collision w/peer returns TRUE */
336 if (bif->bif_peer_bridge != sc->sc_bridge_id)
338 if (bif->bif_peer_port <= sc->sc_designated_port)
344 * The shorter graph distance represented by cu (most of which is also
345 * already stored in our bif_peer_* fields) becomes the designated info.
347 * NOTE: sc_designated_cost does not include bif_path_cost, it is added
348 * in later on a port-by-port basis as needed.
351 bstp_record_config_information(struct bridge_softc *sc,
352 struct bridge_iflist *bif,
353 struct bstp_config_unit *cu)
355 sc->sc_designated_root = bif->bif_peer_root;
356 sc->sc_designated_cost = bif->bif_peer_cost;
357 sc->sc_designated_bridge = bif->bif_peer_bridge;
358 sc->sc_designated_port = bif->bif_peer_port;
359 bstp_timer_start(&bif->bif_message_age_timer, cu->cu_message_age);
363 bstp_record_config_timeout_values(struct bridge_softc *sc,
364 struct bstp_config_unit *config)
366 sc->sc_max_age = config->cu_max_age;
367 sc->sc_hello_time = config->cu_hello_time;
368 sc->sc_forward_delay = config->cu_forward_delay;
369 sc->sc_topology_change = config->cu_topology_change;
373 bstp_config_bpdu_generation(struct bridge_softc *sc)
375 struct bridge_iflist *bif, *nbif;
377 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
378 if ((bif->bif_flags & IFBIF_STP) == 0)
380 if (bif->bif_state != BSTP_IFSTATE_DISABLED &&
381 ((sc->sc_ifp->if_flags & IFF_LINK1) ||
382 (bif->bif_flags & IFBIF_DESIGNATED))) {
383 bstp_transmit_config(sc, bif);
386 if (nbif != NULL && !nbif->bif_onlist) {
387 KKASSERT(bif->bif_onlist);
388 nbif = TAILQ_NEXT(bif, bif_next);
394 bstp_transmit_tcn(struct bridge_softc *sc)
396 struct bstp_tbpdu bpdu;
398 struct ether_header *eh;
401 if (sc->sc_root_port == NULL) /* all iterfaces disabled */
404 ifp = sc->sc_root_port->bif_ifp;
405 if ((ifp->if_flags & IFF_RUNNING) == 0)
408 MGETHDR(m, MB_DONTWAIT, MT_DATA);
412 m->m_pkthdr.rcvif = ifp;
413 m->m_pkthdr.len = sizeof(*eh) + sizeof(bpdu);
414 m->m_len = m->m_pkthdr.len;
416 eh = mtod(m, struct ether_header *);
419 * Packets sent from the bridge always use the bridge MAC
422 memcpy(eh->ether_shost, IF_LLADDR(sc->sc_ifp), ETHER_ADDR_LEN);
423 memcpy(eh->ether_dhost, bstp_etheraddr, ETHER_ADDR_LEN);
424 eh->ether_type = htons(sizeof(bpdu));
426 bpdu.tbu_ssap = bpdu.tbu_dsap = LLC_8021D_LSAP;
427 bpdu.tbu_ctl = LLC_UI;
428 bpdu.tbu_protoid = 0;
429 bpdu.tbu_protover = 0;
430 bpdu.tbu_bpdutype = BSTP_MSGTYPE_TCN;
432 memcpy(mtod(m, caddr_t) + sizeof(*eh), &bpdu, sizeof(bpdu));
434 bridge_enqueue(ifp, m);
438 * Recalculate sc->sc_designated* and sc->sc_root_port (if our bridge
439 * is calculated to be the root bridge). We do this by initializing
440 * the designated variables to point at us and then scan our peers.
441 * Any uninitialized peers will have a max-value root.
443 * Clear IFBIF_DESIGNATED on any ports which no longer match the criteria
444 * required to be a designated port. Only aged out ports and the root
445 * port can be designated.
447 * If we win we do a second scan to determine which port on our bridge
451 bstp_configuration_update(struct bridge_softc *sc)
453 uint64_t designated_root = sc->sc_bridge_id;
454 uint64_t designated_bridge = sc->sc_bridge_id;
455 uint32_t designated_cost = 0xFFFFFFFFU;
456 uint16_t designated_port = 65535;
457 struct bridge_iflist *root_port = NULL;
458 struct bridge_iflist *bif;
461 * Resolve information from our peers. Aged peers will have
462 * a maxed bif_peer_root and not come under consideration.
464 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
465 if ((bif->bif_flags & IFBIF_STP) == 0)
467 if (bif->bif_state == BSTP_IFSTATE_DISABLED ||
468 bif->bif_state == BSTP_IFSTATE_L1BLOCKING) {
472 if (bif->bif_peer_root > designated_root)
474 if (bif->bif_peer_root < designated_root)
478 * NOTE: The designated_cost temporary variable already added
479 * in the path code of the related root port.
481 if (bif->bif_peer_cost + bif->bif_path_cost > designated_cost)
483 if (bif->bif_peer_cost + bif->bif_path_cost < designated_cost)
486 if (bif->bif_peer_bridge > designated_bridge)
488 if (bif->bif_peer_bridge < designated_bridge)
491 if (bif->bif_peer_port > designated_port)
493 if (bif->bif_peer_port < designated_port)
497 * Same root, path cost, bridge, and port. Set the root
498 * only if we do not already have it.
504 * New root port (from peers)
506 * NOTE: Temporarily add bif_path_cost into the designated
507 * cost to reduce complexity in the loop, it will be
508 * subtracted out when we are done.
511 designated_root = bif->bif_peer_root;
512 designated_cost = bif->bif_peer_cost + bif->bif_path_cost;
513 designated_bridge = bif->bif_peer_bridge;
514 designated_port = bif->bif_peer_port;
519 * root_port will be NULL at the start here if all of our
520 * peers are aged or are not as good a root as our bridge would
521 * be. It can also be NULL due to all related links being
524 * If the root winds up being our bridge scan again against local
525 * information. Unconditionally update IFBIF_DESIGNATED.
527 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
528 bif->bif_flags &= ~(IFBIF_DESIGNATED | IFBIF_ROOT);
529 if ((bif->bif_flags & IFBIF_STP) == 0)
531 if (bif->bif_state == BSTP_IFSTATE_DISABLED ||
532 bif->bif_state == BSTP_IFSTATE_L1BLOCKING) {
537 * Set DESIGNATED for an aged or unknown peer.
539 if (bif->bif_peer_bridge == 0xFFFFFFFFFFFFFFFFLLU)
540 bif->bif_flags |= IFBIF_DESIGNATED;
541 if (designated_root != sc->sc_bridge_id)
545 * This is only reached if our bridge is the root bridge,
546 * select the root port (IFBIF_DESIGNATED is set at the
549 * We do NOT use peer info here.
551 if (bif->bif_path_cost > designated_cost)
553 if (bif->bif_path_cost < designated_cost)
556 if (bif->bif_port_id > designated_port)
558 if (bif->bif_port_id < designated_port)
560 /* degenerate case (possible peer collision w/our key */
566 designated_cost = bif->bif_path_cost;
567 designated_bridge = sc->sc_bridge_id;
568 designated_port = bif->bif_port_id;
573 * Update aggregate information. The selected root port always
574 * becomes a designated port (along with aged ports). This can
575 * either be the port whos peer is closest to the root or it
576 * can be one of our ports if our bridge is the root.
578 * The root cost we record in sc_designated_root does not include
579 * bif_path_cost of the root port, since we may transmit this
580 * out of any port we will add the cost back in later on on
583 * root_port can be NULL here (if all links are disabled)
586 sc->sc_designated_root = designated_root;
587 sc->sc_designated_cost = designated_cost -
588 root_port->bif_path_cost;
589 sc->sc_designated_bridge = designated_bridge;
590 sc->sc_designated_port = designated_port;
591 root_port->bif_flags |= IFBIF_DESIGNATED | IFBIF_ROOT;
593 sc->sc_designated_root = designated_root;
594 sc->sc_designated_cost = designated_cost;
595 sc->sc_designated_bridge = designated_bridge;
596 sc->sc_designated_port = designated_port;
598 sc->sc_root_port = root_port;
602 * Calculate the desired state for each interface link on our bridge.
604 * The best port will match against sc->sc_root_port (whether we are root
605 * or whether that port is the closest to the root). We push this port
606 * towards a FORWARDING state.
608 * Next come designated ports, either aged ports or ports with no peer info
609 * (yet), or the peer who is closest to the root. We push this port towards
610 * a FORWARDING state as well.
612 * Any remaining ports are pushed towards a BLOCKING state. Both sides of
613 * the port (us and our peer) should wind up placing the two ends in this
614 * state or bad things happen.
617 bstp_port_state_selection(struct bridge_softc *sc)
619 struct bridge_iflist *bif, *nbif;
621 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
622 if ((bif->bif_flags & IFBIF_STP) == 0)
624 if (sc->sc_root_port &&
625 bif->bif_info == sc->sc_root_port->bif_info) {
626 bif->bif_config_pending = 0;
627 bif->bif_topology_change_acknowledge = 0;
628 bstp_make_forwarding(sc, bif);
629 } else if (bif->bif_flags & IFBIF_DESIGNATED) {
630 bstp_timer_stop(&bif->bif_message_age_timer);
631 bstp_make_forwarding(sc, bif);
633 bif->bif_config_pending = 0;
634 bif->bif_topology_change_acknowledge = 0;
635 bstp_make_blocking(sc, bif);
638 if (nbif != NULL && !nbif->bif_onlist) {
639 KKASSERT(bif->bif_onlist);
640 nbif = TAILQ_NEXT(bif, bif_next);
646 * Clear peer info, effectively makes the port looked aged out.
647 * It becomes a designated go-to port.
650 bstp_clear_peer_info(struct bridge_softc *sc, struct bridge_iflist *bif)
652 bif->bif_peer_root = 0xFFFFFFFFFFFFFFFFLLU;
653 bif->bif_peer_cost = 0xFFFFFFFFU;
654 bif->bif_peer_bridge = 0xFFFFFFFFFFFFFFFFLLU;
655 bif->bif_peer_port = 0xFFFFU;
657 if (bif->bif_state != BSTP_IFSTATE_DISABLED &&
658 bif->bif_state != BSTP_IFSTATE_L1BLOCKING) {
659 bif->bif_flags |= IFBIF_DESIGNATED;
664 bstp_make_forwarding(struct bridge_softc *sc, struct bridge_iflist *bif)
666 if (bif->bif_state == BSTP_IFSTATE_BLOCKING ||
667 bif->bif_state == BSTP_IFSTATE_BONDED) {
668 bstp_set_port_state(bif, BSTP_IFSTATE_LISTENING);
669 bstp_timer_start(&bif->bif_forward_delay_timer, 0);
674 bstp_make_blocking(struct bridge_softc *sc, struct bridge_iflist *bif)
676 if (bif->bif_state != BSTP_IFSTATE_DISABLED &&
677 bif->bif_state != BSTP_IFSTATE_BLOCKING &&
678 bif->bif_state != BSTP_IFSTATE_BONDED &&
679 bif->bif_state != BSTP_IFSTATE_L1BLOCKING) {
680 if ((bif->bif_state == BSTP_IFSTATE_FORWARDING) ||
681 (bif->bif_state == BSTP_IFSTATE_LEARNING)) {
682 if (bif->bif_change_detection_enabled) {
683 bstp_topology_change_detection(sc);
686 bstp_set_port_state(bif, BSTP_IFSTATE_BLOCKING);
687 bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
688 bstp_timer_stop(&bif->bif_forward_delay_timer);
689 if (sc->sc_ifp->if_flags & IFF_LINK2)
690 bstp_adjust_bonded_states(sc, bif);
695 bstp_make_l1blocking(struct bridge_softc *sc, struct bridge_iflist *bif)
697 int was_forwarding = (bif->bif_state == BSTP_IFSTATE_FORWARDING);
699 switch(bif->bif_state) {
700 case BSTP_IFSTATE_LISTENING:
701 case BSTP_IFSTATE_LEARNING:
702 case BSTP_IFSTATE_FORWARDING:
703 case BSTP_IFSTATE_BLOCKING:
704 case BSTP_IFSTATE_BONDED:
705 bstp_set_port_state(bif, BSTP_IFSTATE_L1BLOCKING);
706 bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
707 bstp_timer_stop(&bif->bif_forward_delay_timer);
708 bstp_timer_stop(&bif->bif_link1_timer);
709 if (bif->bif_flags & IFBIF_DESIGNATED) {
710 bif->bif_flags &= ~IFBIF_DESIGNATED;
711 bstp_configuration_update(sc);
712 bstp_port_state_selection(sc);
714 if (was_forwarding && (sc->sc_ifp->if_flags & IFF_LINK2))
715 bstp_adjust_bonded_states(sc, bif);
723 * Member (bif) changes to or from a FORWARDING state. All members in the
724 * same bonding group which are in a BLOCKING or BONDED state must be set
725 * to either BLOCKING or BONDED based on whether any members in the bonding
726 * group remain in the FORWARDING state.
728 * Going between the BLOCKING and BONDED states does not require a
729 * configuration update.
732 bstp_adjust_bonded_states(struct bridge_softc *sc, struct bridge_iflist *obif)
734 struct bridge_iflist *bif;
735 int state = BSTP_IFSTATE_BLOCKING;
737 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
738 if ((bif->bif_flags & IFBIF_STP) == 0)
740 if (bif->bif_state != BSTP_IFSTATE_FORWARDING)
742 if (memcmp(IF_LLADDR(bif->bif_ifp), IF_LLADDR(obif->bif_ifp),
743 ETHER_ADDR_LEN) != 0) {
746 state = BSTP_IFSTATE_BONDED;
749 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
750 if ((bif->bif_flags & IFBIF_STP) == 0)
752 if (bif->bif_state != BSTP_IFSTATE_BLOCKING &&
753 bif->bif_state != BSTP_IFSTATE_BONDED) {
756 if (memcmp(IF_LLADDR(bif->bif_ifp), IF_LLADDR(obif->bif_ifp),
757 ETHER_ADDR_LEN) != 0) {
760 if (bif->bif_bond_weight == 0)
761 bif->bif_state = BSTP_IFSTATE_BLOCKING;
763 bif->bif_state = state;
768 bstp_set_port_state(struct bridge_iflist *bif, uint8_t state)
770 bif->bif_state = state;
774 bstp_topology_change_detection(struct bridge_softc *sc)
776 if (bstp_root_bridge(sc)) {
777 sc->sc_topology_change = 1;
778 bstp_timer_start(&sc->sc_topology_change_timer, 0);
779 } else if (!sc->sc_topology_change_detected) {
780 bstp_transmit_tcn(sc);
781 bstp_timer_start(&sc->sc_tcn_timer, 0);
783 sc->sc_topology_change_detected = 1;
787 bstp_topology_change_acknowledged(struct bridge_softc *sc)
789 sc->sc_topology_change_detected = 0;
790 bstp_timer_stop(&sc->sc_tcn_timer);
794 bstp_acknowledge_topology_change(struct bridge_softc *sc,
795 struct bridge_iflist *bif)
797 bif->bif_topology_change_acknowledge = 1;
798 bstp_transmit_config(sc, bif);
802 bstp_input(struct bridge_softc *sc, struct bridge_iflist *bif, struct mbuf *m)
804 struct ether_header *eh;
805 struct bstp_tbpdu tpdu;
806 struct bstp_cbpdu cpdu;
807 struct bstp_config_unit cu;
808 struct bstp_tcn_unit tu;
811 if ((bif->bif_flags & IFBIF_STP) == 0)
815 * The L1BLOCKING (ping pong failover) test needs to reset the
816 * timer if LINK1 is active.
818 if (bif->bif_state == BSTP_IFSTATE_L1BLOCKING) {
819 bstp_set_port_state(bif, BSTP_IFSTATE_BLOCKING);
820 if (sc->sc_ifp->if_flags & IFF_LINK1)
821 bstp_timer_start(&bif->bif_link1_timer, 0);
822 bstp_make_forwarding(sc, bif);
823 } else if (sc->sc_ifp->if_flags & IFF_LINK1) {
824 bstp_timer_start(&bif->bif_link1_timer, 0);
827 eh = mtod(m, struct ether_header *);
829 len = ntohs(eh->ether_type);
830 if (len < sizeof(tpdu))
833 m_adj(m, ETHER_HDR_LEN);
835 if (m->m_pkthdr.len > len)
836 m_adj(m, len - m->m_pkthdr.len);
837 if (m->m_len < sizeof(tpdu) &&
838 (m = m_pullup(m, sizeof(tpdu))) == NULL)
841 memcpy(&tpdu, mtod(m, caddr_t), sizeof(tpdu));
843 if (tpdu.tbu_dsap != LLC_8021D_LSAP ||
844 tpdu.tbu_ssap != LLC_8021D_LSAP ||
845 tpdu.tbu_ctl != LLC_UI)
847 if (tpdu.tbu_protoid != 0 || tpdu.tbu_protover != 0)
850 switch (tpdu.tbu_bpdutype) {
851 case BSTP_MSGTYPE_TCN:
852 tu.tu_message_type = tpdu.tbu_bpdutype;
853 bstp_received_tcn_bpdu(sc, bif, &tu);
855 case BSTP_MSGTYPE_CFG:
856 if (m->m_len < sizeof(cpdu) &&
857 (m = m_pullup(m, sizeof(cpdu))) == NULL)
859 memcpy(&cpdu, mtod(m, caddr_t), sizeof(cpdu));
862 (((uint64_t)ntohs(cpdu.cbu_rootpri)) << 48) |
863 (((uint64_t)cpdu.cbu_rootaddr[0]) << 40) |
864 (((uint64_t)cpdu.cbu_rootaddr[1]) << 32) |
865 (((uint64_t)cpdu.cbu_rootaddr[2]) << 24) |
866 (((uint64_t)cpdu.cbu_rootaddr[3]) << 16) |
867 (((uint64_t)cpdu.cbu_rootaddr[4]) << 8) |
868 (((uint64_t)cpdu.cbu_rootaddr[5]) << 0);
871 (((uint64_t)ntohs(cpdu.cbu_bridgepri)) << 48) |
872 (((uint64_t)cpdu.cbu_bridgeaddr[0]) << 40) |
873 (((uint64_t)cpdu.cbu_bridgeaddr[1]) << 32) |
874 (((uint64_t)cpdu.cbu_bridgeaddr[2]) << 24) |
875 (((uint64_t)cpdu.cbu_bridgeaddr[3]) << 16) |
876 (((uint64_t)cpdu.cbu_bridgeaddr[4]) << 8) |
877 (((uint64_t)cpdu.cbu_bridgeaddr[5]) << 0);
879 cu.cu_root_path_cost = ntohl(cpdu.cbu_rootpathcost);
880 cu.cu_message_age = ntohs(cpdu.cbu_messageage);
881 cu.cu_max_age = ntohs(cpdu.cbu_maxage);
882 cu.cu_hello_time = ntohs(cpdu.cbu_hellotime);
883 cu.cu_forward_delay = ntohs(cpdu.cbu_forwarddelay);
884 cu.cu_port_id = ntohs(cpdu.cbu_portid);
885 cu.cu_message_type = cpdu.cbu_bpdutype;
886 cu.cu_topology_change_acknowledgment =
887 (cpdu.cbu_flags & BSTP_FLAG_TCA) ? 1 : 0;
888 cu.cu_topology_change =
889 (cpdu.cbu_flags & BSTP_FLAG_TC) ? 1 : 0;
890 bstp_received_config_bpdu(sc, bif, &cu);
901 bstp_received_config_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
902 struct bstp_config_unit *cu)
906 iamroot = bstp_root_bridge(sc);
908 if (bif->bif_state != BSTP_IFSTATE_DISABLED) {
910 * Record information from peer. The peer_cost field
911 * does not include the local bif->bif_path_cost, it will
912 * be added in as needed (since it can be modified manually
913 * this way we don't have to worry about fixups).
915 bif->bif_peer_root = cu->cu_rootid;
916 bif->bif_peer_cost = cu->cu_root_path_cost;
917 bif->bif_peer_bridge = cu->cu_bridge_id;
918 bif->bif_peer_port = cu->cu_port_id;
920 if (bstp_supersedes_port_info(sc, bif)) {
921 bstp_record_config_information(sc, bif, cu);
922 bstp_configuration_update(sc);
923 bstp_port_state_selection(sc);
926 * If our bridge loses its root status (?)
928 * Hello's (unsolicited CFG packets) are generated
929 * every hello period of LINK1 is set, otherwise
930 * we are no longer the root bridge and must stop
931 * generating unsolicited CFG packets.
933 if (iamroot && bstp_root_bridge(sc) == 0) {
934 if ((sc->sc_ifp->if_flags & IFF_LINK1) == 0)
935 bstp_timer_stop(&sc->sc_hello_timer);
937 if (sc->sc_topology_change_detected) {
939 &sc->sc_topology_change_timer);
940 bstp_transmit_tcn(sc);
941 bstp_timer_start(&sc->sc_tcn_timer, 0);
945 if (sc->sc_root_port &&
946 bif->bif_info == sc->sc_root_port->bif_info) {
947 bstp_record_config_timeout_values(sc, cu);
948 bstp_config_bpdu_generation(sc);
950 if (cu->cu_topology_change_acknowledgment)
951 bstp_topology_change_acknowledged(sc);
953 } else if (bif->bif_flags & IFBIF_DESIGNATED) {
955 * Update designated ports (aged out peers or
956 * the port closest to the root) at a faster pace.
958 * Clear our designated flag if we aren't marked
961 bstp_transmit_config(sc, bif);
962 if ((bif->bif_flags & IFBIF_ROOT) == 0) {
963 bif->bif_flags &= ~IFBIF_DESIGNATED;
964 bstp_configuration_update(sc);
965 bstp_port_state_selection(sc);
972 bstp_received_tcn_bpdu(struct bridge_softc *sc, struct bridge_iflist *bif,
973 struct bstp_tcn_unit *tcn)
975 if (bif->bif_state != BSTP_IFSTATE_DISABLED &&
976 (bif->bif_flags & IFBIF_DESIGNATED)) {
977 bstp_topology_change_detection(sc);
978 bstp_acknowledge_topology_change(sc, bif);
983 * link1 forces continuous hello's (the bridge interface must be cycled
984 * to start them up), so keep the timer hot if that is the case, otherwise
985 * only send HELLO's if we are the root.
988 bstp_hello_timer_expiry(struct bridge_softc *sc)
990 bstp_config_bpdu_generation(sc);
992 if ((sc->sc_ifp->if_flags & IFF_LINK1) || bstp_root_bridge(sc))
993 bstp_timer_start(&sc->sc_hello_timer, 0);
997 bstp_message_age_timer_expiry(struct bridge_softc *sc,
998 struct bridge_iflist *bif)
1002 iamroot = bstp_root_bridge(sc);
1003 bstp_clear_peer_info(sc, bif);
1004 bstp_configuration_update(sc);
1005 bstp_port_state_selection(sc);
1008 * If we've become the root and were not the root before
1009 * we have some cleanup to do. This also occurs if we
1010 * wind up being completely isolated.
1012 if (iamroot == 0 && bstp_root_bridge(sc)) {
1013 sc->sc_max_age = sc->sc_bridge_max_age;
1014 sc->sc_hello_time = sc->sc_bridge_hello_time;
1015 sc->sc_forward_delay = sc->sc_bridge_forward_delay;
1017 bstp_topology_change_detection(sc);
1018 bstp_timer_stop(&sc->sc_tcn_timer);
1019 bstp_config_bpdu_generation(sc);
1020 bstp_timer_start(&sc->sc_hello_timer, 0);
1025 bstp_forward_delay_timer_expiry(struct bridge_softc *sc,
1026 struct bridge_iflist *bif)
1028 if (bif->bif_state == BSTP_IFSTATE_LISTENING) {
1029 bstp_set_port_state(bif, BSTP_IFSTATE_LEARNING);
1030 bstp_timer_start(&bif->bif_forward_delay_timer, 0);
1031 } else if (bif->bif_state == BSTP_IFSTATE_LEARNING) {
1032 bstp_set_port_state(bif, BSTP_IFSTATE_FORWARDING);
1033 if (sc->sc_designated_bridge == sc->sc_bridge_id &&
1034 bif->bif_change_detection_enabled) {
1035 bstp_topology_change_detection(sc);
1037 if (sc->sc_ifp->if_flags & IFF_LINK2)
1038 bstp_adjust_bonded_states(sc, bif);
1043 bstp_tcn_timer_expiry(struct bridge_softc *sc)
1045 bstp_transmit_tcn(sc);
1046 bstp_timer_start(&sc->sc_tcn_timer, 0);
1050 bstp_topology_change_timer_expiry(struct bridge_softc *sc)
1052 sc->sc_topology_change_detected = 0;
1053 sc->sc_topology_change = 0;
1057 bstp_hold_timer_expiry(struct bridge_softc *sc, struct bridge_iflist *bif)
1059 if (bif->bif_config_pending)
1060 bstp_transmit_config(sc, bif);
1064 * If no traffic received directly on this port for the specified
1065 * period with link1 set we go into a special blocking mode to
1066 * fail-over traffic to another port.
1069 bstp_link1_timer_expiry(struct bridge_softc *sc, struct bridge_iflist *bif)
1071 if (sc->sc_ifp->if_flags & IFF_LINK1)
1072 bstp_make_l1blocking(sc, bif);
1076 bstp_addr_cmp(const uint8_t *a, const uint8_t *b)
1080 for (i = 0, d = 0; i < ETHER_ADDR_LEN && d == 0; i++) {
1081 d = ((int)a[i]) - ((int)b[i]);
1088 bstp_initialization(struct bridge_softc *sc)
1090 struct bridge_iflist *bif, *mif, *nbif;
1093 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
1096 * Figure out our bridge ID, use the lowest-valued MAC.
1097 * Include the bridge's own random MAC in the calculation.
1101 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1102 if ((bif->bif_flags & IFBIF_STP) == 0)
1104 if (bif->bif_ifp->if_type != IFT_ETHER)
1111 bif->bif_port_id = (bif->bif_priority << 8) |
1112 (bif->bif_ifp->if_index & 0xff);
1113 if (bstp_addr_cmp(IF_LLADDR(bif->bif_ifp),
1114 IF_LLADDR(mif->bif_ifp)) < 0) {
1124 if (bstp_addr_cmp(IF_LLADDR(sc->sc_ifp), IF_LLADDR(mif->bif_ifp)) < 0)
1125 e_addr = IF_LLADDR(sc->sc_ifp);
1127 e_addr = IF_LLADDR(mif->bif_ifp);
1130 (((uint64_t)sc->sc_bridge_priority) << 48) |
1131 (((uint64_t)e_addr[0]) << 40) |
1132 (((uint64_t)e_addr[1]) << 32) |
1133 (((uint64_t)e_addr[2]) << 24) |
1134 (((uint64_t)e_addr[3]) << 16) |
1135 (((uint64_t)e_addr[4]) << 8) |
1136 (((uint64_t)e_addr[5]));
1139 * Remainder of setup.
1142 sc->sc_designated_root = sc->sc_bridge_id;
1143 sc->sc_designated_cost = 0;
1144 sc->sc_root_port = NULL;
1146 sc->sc_max_age = sc->sc_bridge_max_age;
1147 sc->sc_hello_time = sc->sc_bridge_hello_time;
1148 sc->sc_forward_delay = sc->sc_bridge_forward_delay;
1149 sc->sc_topology_change_detected = 0;
1150 sc->sc_topology_change = 0;
1151 bstp_timer_stop(&sc->sc_tcn_timer);
1152 bstp_timer_stop(&sc->sc_topology_change_timer);
1154 if (callout_pending(&sc->sc_bstpcallout) == 0)
1155 callout_reset(&sc->sc_bstpcallout, hz,
1158 TAILQ_FOREACH_MUTABLE(bif, &sc->sc_iflists[mycpuid], bif_next, nbif) {
1159 if (sc->sc_ifp->if_flags & IFF_LINK1)
1160 bstp_timer_start(&bif->bif_link1_timer, 0);
1161 if (bif->bif_flags & IFBIF_STP)
1162 bstp_ifupdstatus(sc, bif);
1164 bstp_disable_port(sc, bif);
1166 if (nbif != NULL && !nbif->bif_onlist) {
1167 KKASSERT(bif->bif_onlist);
1168 nbif = TAILQ_NEXT(bif, bif_next);
1172 bstp_port_state_selection(sc);
1173 bstp_config_bpdu_generation(sc);
1174 bstp_timer_start(&sc->sc_hello_timer, 0);
1178 bstp_stop(struct bridge_softc *sc)
1180 struct bridge_iflist *bif;
1181 struct lwkt_msg *lmsg;
1183 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
1185 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1186 bstp_set_port_state(bif, BSTP_IFSTATE_DISABLED);
1187 bstp_timer_stop(&bif->bif_hold_timer);
1188 bstp_timer_stop(&bif->bif_message_age_timer);
1189 bstp_timer_stop(&bif->bif_forward_delay_timer);
1190 bstp_timer_stop(&bif->bif_link1_timer);
1193 callout_stop(&sc->sc_bstpcallout);
1195 bstp_timer_stop(&sc->sc_topology_change_timer);
1196 bstp_timer_stop(&sc->sc_tcn_timer);
1197 bstp_timer_stop(&sc->sc_hello_timer);
1200 lmsg = &sc->sc_bstptimemsg.lmsg;
1201 if ((lmsg->ms_flags & MSGF_DONE) == 0) {
1202 /* Pending to be processed; drop it */
1209 bstp_initialize_port(struct bridge_softc *sc, struct bridge_iflist *bif)
1211 int needs_adjust = (bif->bif_state == BSTP_IFSTATE_FORWARDING ||
1212 bif->bif_state == BSTP_IFSTATE_BLOCKING ||
1213 bif->bif_state == BSTP_IFSTATE_BONDED);
1215 bstp_set_port_state(bif, BSTP_IFSTATE_BLOCKING);
1216 bstp_clear_peer_info(sc, bif);
1217 bif->bif_topology_change_acknowledge = 0;
1218 bif->bif_config_pending = 0;
1219 bif->bif_change_detection_enabled = 1;
1220 bstp_timer_stop(&bif->bif_message_age_timer);
1221 bstp_timer_stop(&bif->bif_forward_delay_timer);
1222 bstp_timer_stop(&bif->bif_hold_timer);
1223 bstp_timer_stop(&bif->bif_link1_timer);
1224 if (needs_adjust && (sc->sc_ifp->if_flags & IFF_LINK2))
1225 bstp_adjust_bonded_states(sc, bif);
1229 bstp_enable_port(struct bridge_softc *sc, struct bridge_iflist *bif)
1231 bstp_initialize_port(sc, bif);
1232 if (sc->sc_ifp->if_flags & IFF_LINK1)
1233 bstp_timer_start(&bif->bif_link1_timer, 0);
1234 bstp_port_state_selection(sc);
1238 bstp_disable_port(struct bridge_softc *sc, struct bridge_iflist *bif)
1240 int was_forwarding = (bif->bif_state == BSTP_IFSTATE_FORWARDING);
1243 iamroot = bstp_root_bridge(sc);
1245 bstp_clear_peer_info(sc, bif);
1246 bstp_set_port_state(bif, BSTP_IFSTATE_DISABLED);
1247 bif->bif_topology_change_acknowledge = 0;
1248 bif->bif_config_pending = 0;
1249 bstp_timer_stop(&bif->bif_message_age_timer);
1250 bstp_timer_stop(&bif->bif_forward_delay_timer);
1251 bstp_timer_stop(&bif->bif_link1_timer);
1252 bstp_configuration_update(sc);
1253 bstp_port_state_selection(sc);
1254 bridge_rtdelete(sc, bif->bif_ifp, IFBF_FLUSHDYN);
1255 if (was_forwarding && (sc->sc_ifp->if_flags & IFF_LINK2))
1256 bstp_adjust_bonded_states(sc, bif);
1258 if (iamroot == 0 && bstp_root_bridge(sc)) {
1259 sc->sc_max_age = sc->sc_bridge_max_age;
1260 sc->sc_hello_time = sc->sc_bridge_hello_time;
1261 sc->sc_forward_delay = sc->sc_bridge_forward_delay;
1263 bstp_topology_change_detection(sc);
1264 bstp_timer_stop(&sc->sc_tcn_timer);
1265 bstp_config_bpdu_generation(sc);
1266 bstp_timer_start(&sc->sc_hello_timer, 0);
1271 bstp_linkstate(struct ifnet *ifp, int state)
1273 struct bridge_softc *sc;
1274 struct bridge_iflist *bif;
1276 sc = ifp->if_bridge;
1277 ifnet_serialize_all(sc->sc_ifp);
1280 * bstp_ifupdstatus() may block, but it is the last
1281 * operation of the member iface iteration, so we
1282 * don't need to use LIST_FOREACH_MUTABLE()+bif_onlist
1285 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1286 if ((bif->bif_flags & IFBIF_STP) == 0)
1289 if (bif->bif_ifp == ifp) {
1290 bstp_ifupdstatus(sc, bif);
1294 ifnet_deserialize_all(sc->sc_ifp);
1298 bstp_ifupdstatus(struct bridge_softc *sc, struct bridge_iflist *bif)
1300 struct ifnet *ifp = bif->bif_ifp;
1301 struct ifmediareq ifmr;
1304 bzero((char *)&ifmr, sizeof(ifmr));
1305 ifnet_serialize_all(ifp);
1306 error = (*ifp->if_ioctl)(ifp, SIOCGIFMEDIA, (caddr_t)&ifmr, NULL);
1307 ifnet_deserialize_all(ifp);
1309 if ((error == 0) && (ifp->if_flags & IFF_UP)) {
1310 if (ifmr.ifm_status & IFM_ACTIVE) {
1311 if (bif->bif_state == BSTP_IFSTATE_DISABLED)
1312 bstp_enable_port(sc, bif);
1315 if (bif->bif_state != BSTP_IFSTATE_DISABLED)
1316 bstp_disable_port(sc, bif);
1321 if (bif->bif_state != BSTP_IFSTATE_DISABLED)
1322 bstp_disable_port(sc, bif);
1326 bstp_tick(void *arg)
1328 struct bridge_softc *sc = arg;
1329 struct lwkt_msg *lmsg;
1331 KKASSERT(mycpuid == BRIDGE_CFGCPU);
1335 if (callout_pending(&sc->sc_bstpcallout) ||
1336 !callout_active(&sc->sc_bstpcallout)) {
1340 callout_deactivate(&sc->sc_bstpcallout);
1342 lmsg = &sc->sc_bstptimemsg.lmsg;
1343 KKASSERT(lmsg->ms_flags & MSGF_DONE);
1344 lwkt_sendmsg(BRIDGE_CFGPORT, lmsg);
1350 bstp_tick_handler(netmsg_t msg)
1352 struct bridge_softc *sc = msg->lmsg.u.ms_resultp;
1353 struct bridge_iflist *bif;
1355 KKASSERT(&curthread->td_msgport == BRIDGE_CFGPORT);
1358 lwkt_replymsg(&msg->lmsg, 0);
1361 ifnet_serialize_all(sc->sc_ifp);
1365 * We don't need to worry that member iface is ripped
1366 * from the per-cpu list during the blocking operation
1367 * in the loop body, since deletion is serialized by
1371 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1372 if ((bif->bif_flags & IFBIF_STP) == 0)
1375 * XXX This can cause a lag in "link does away"
1376 * XXX and "spanning tree gets updated". We need
1377 * XXX come sort of callback from the link state
1378 * XXX update code to kick spanning tree.
1379 * XXX --thorpej@NetBSD.org
1381 bstp_ifupdstatus(sc, bif);
1384 if (bstp_timer_expired(&sc->sc_hello_timer, sc->sc_hello_time))
1385 bstp_hello_timer_expiry(sc);
1387 if (bstp_timer_expired(&sc->sc_tcn_timer, sc->sc_bridge_hello_time))
1388 bstp_tcn_timer_expiry(sc);
1390 if (bstp_timer_expired(&sc->sc_topology_change_timer,
1391 sc->sc_topology_change_time))
1392 bstp_topology_change_timer_expiry(sc);
1394 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1395 if ((bif->bif_flags & IFBIF_STP) == 0)
1397 if (bstp_timer_expired(&bif->bif_message_age_timer,
1399 bstp_message_age_timer_expiry(sc, bif);
1402 TAILQ_FOREACH(bif, &sc->sc_iflists[mycpuid], bif_next) {
1403 if ((bif->bif_flags & IFBIF_STP) == 0)
1405 if (bstp_timer_expired(&bif->bif_forward_delay_timer,
1406 sc->sc_forward_delay))
1407 bstp_forward_delay_timer_expiry(sc, bif);
1409 if (bstp_timer_expired(&bif->bif_hold_timer,
1411 bstp_hold_timer_expiry(sc, bif);
1413 if (bstp_timer_expired(&bif->bif_link1_timer,
1414 sc->sc_hello_time * 10))
1415 bstp_link1_timer_expiry(sc, bif);
1418 if (sc->sc_ifp->if_flags & IFF_RUNNING)
1419 callout_reset(&sc->sc_bstpcallout, hz, bstp_tick, sc);
1421 ifnet_deserialize_all(sc->sc_ifp);
1425 bstp_timer_start(struct bridge_timer *t, uint16_t v)
1432 bstp_timer_stop(struct bridge_timer *t)
1439 bstp_timer_expired(struct bridge_timer *t, uint16_t v)
1443 t->value += BSTP_TICK_VAL;
1444 if (t->value >= v) {