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drbd: Renamed overwrite_peer to primary_force
[linux-2.6/next.git] / net / mac80211 / mesh_plink.c
blobbc4e20e57ff566e0d67d7c3ad7f4347094ad1c55
1 /*
2 * Copyright (c) 2008, 2009 open80211s Ltd.
3 * Author: Luis Carlos Cobo <luisca@cozybit.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9 #include <linux/kernel.h>
10 #include <linux/random.h>
11 #include "ieee80211_i.h"
12 #include "rate.h"
13 #include "mesh.h"
14
15 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
16 #define mpl_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args)
17 #else
18 #define mpl_dbg(fmt, args...) do { (void)(0); } while (0)
19 #endif
20
21 #define PLINK_GET_LLID(p) (p + 4)
22 #define PLINK_GET_PLID(p) (p + 6)
23
24 #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
25 jiffies + HZ * t / 1000))
26
27 /* Peer link cancel reasons, all subject to ANA approval */
28 #define MESH_LINK_CANCELLED 2
29 #define MESH_MAX_NEIGHBORS 3
30 #define MESH_CAPABILITY_POLICY_VIOLATION 4
31 #define MESH_CLOSE_RCVD 5
32 #define MESH_MAX_RETRIES 6
33 #define MESH_CONFIRM_TIMEOUT 7
34 #define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8
35 #define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9
36 #define MESH_SECURITY_FAILED_VERIFICATION 10
37
38 #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries)
39 #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout)
40 #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout)
41 #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout)
42 #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks)
43
44 enum plink_frame_type {
45 PLINK_OPEN = 0,
46 PLINK_CONFIRM,
47 PLINK_CLOSE
48 };
49
50 enum plink_event {
51 PLINK_UNDEFINED,
52 OPN_ACPT,
53 OPN_RJCT,
54 OPN_IGNR,
55 CNF_ACPT,
56 CNF_RJCT,
57 CNF_IGNR,
58 CLS_ACPT,
59 CLS_IGNR
60 };
61
62 static inline
63 void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
64 {
65 atomic_inc(&sdata->u.mesh.mshstats.estab_plinks);
66 mesh_accept_plinks_update(sdata);
67 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
68 }
69
70 static inline
71 void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata)
72 {
73 atomic_dec(&sdata->u.mesh.mshstats.estab_plinks);
74 mesh_accept_plinks_update(sdata);
75 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
76 }
77
78 /**
79 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
80 *
81 * @sta: mesh peer link to restart
82 *
83 * Locking: this function must be called holding sta->lock
84 */
85 static inline void mesh_plink_fsm_restart(struct sta_info *sta)
86 {
87 sta->plink_state = PLINK_LISTEN;
88 sta->llid = sta->plid = sta->reason = 0;
89 sta->plink_retries = 0;
90 }
91
92 /*
93 * NOTE: This is just an alias for sta_info_alloc(), see notes
94 * on it in the lifecycle management section!
95 */
96 static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
97 u8 *hw_addr, u32 rates)
98 {
99 struct ieee80211_local *local = sdata->local;
100 struct sta_info *sta;
101
102 if (local->num_sta >= MESH_MAX_PLINKS)
103 return NULL;
104
105 sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
106 if (!sta)
107 return NULL;
108
109 sta->flags = WLAN_STA_AUTHORIZED;
110 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
111 rate_control_rate_init(sta);
112
113 return sta;
114 }
115
116 /**
117 * mesh_plink_deactivate - deactivate mesh peer link
118 *
119 * @sta: mesh peer link to deactivate
120 *
121 * All mesh paths with this peer as next hop will be flushed
122 *
123 * Locking: the caller must hold sta->lock
124 */
125 static void __mesh_plink_deactivate(struct sta_info *sta)
126 {
127 struct ieee80211_sub_if_data *sdata = sta->sdata;
128
129 if (sta->plink_state == PLINK_ESTAB)
130 mesh_plink_dec_estab_count(sdata);
131 sta->plink_state = PLINK_BLOCKED;
132 mesh_path_flush_by_nexthop(sta);
133 }
134
135 /**
136 * __mesh_plink_deactivate - deactivate mesh peer link
137 *
138 * @sta: mesh peer link to deactivate
139 *
140 * All mesh paths with this peer as next hop will be flushed
141 */
142 void mesh_plink_deactivate(struct sta_info *sta)
143 {
144 spin_lock_bh(&sta->lock);
145 __mesh_plink_deactivate(sta);
146 spin_unlock_bh(&sta->lock);
147 }
148
149 static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
150 enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid,
151 __le16 reason) {
152 struct ieee80211_local *local = sdata->local;
153 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400);
154 struct ieee80211_mgmt *mgmt;
155 bool include_plid = false;
156 static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A };
157 u8 *pos;
158 int ie_len;
159
160 if (!skb)
161 return -1;
162 skb_reserve(skb, local->hw.extra_tx_headroom);
163 /* 25 is the size of the common mgmt part (24) plus the size of the
164 * common action part (1)
165 */
166 mgmt = (struct ieee80211_mgmt *)
167 skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action));
168 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action));
169 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
170 IEEE80211_STYPE_ACTION);
171 memcpy(mgmt->da, da, ETH_ALEN);
172 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
173 /* BSSID is left zeroed, wildcard value */
174 mgmt->u.action.category = MESH_PLINK_CATEGORY;
175 mgmt->u.action.u.plink_action.action_code = action;
176
177 if (action == PLINK_CLOSE)
178 mgmt->u.action.u.plink_action.aux = reason;
179 else {
180 mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0);
181 if (action == PLINK_CONFIRM) {
182 pos = skb_put(skb, 4);
183 /* two-byte status code followed by two-byte AID */
184 memset(pos, 0, 2);
185 memcpy(pos + 2, &plid, 2);
186 }
187 mesh_mgmt_ies_add(skb, sdata);
188 }
189
190 /* Add Peer Link Management element */
191 switch (action) {
192 case PLINK_OPEN:
193 ie_len = 6;
194 break;
195 case PLINK_CONFIRM:
196 ie_len = 8;
197 include_plid = true;
198 break;
199 case PLINK_CLOSE:
200 default:
201 if (!plid)
202 ie_len = 8;
203 else {
204 ie_len = 10;
205 include_plid = true;
206 }
207 break;
208 }
209
210 pos = skb_put(skb, 2 + ie_len);
211 *pos++ = WLAN_EID_PEER_LINK;
212 *pos++ = ie_len;
213 memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto));
214 pos += 4;
215 memcpy(pos, &llid, 2);
216 if (include_plid) {
217 pos += 2;
218 memcpy(pos, &plid, 2);
219 }
220 if (action == PLINK_CLOSE) {
221 pos += 2;
222 memcpy(pos, &reason, 2);
223 }
224
225 ieee80211_tx_skb(sdata, skb);
226 return 0;
227 }
228
229 void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata,
230 bool peer_accepting_plinks)
231 {
232 struct ieee80211_local *local = sdata->local;
233 struct sta_info *sta;
234
235 rcu_read_lock();
236
237 sta = sta_info_get(sdata, hw_addr);
238 if (!sta) {
239 rcu_read_unlock();
240
241 sta = mesh_plink_alloc(sdata, hw_addr, rates);
242 if (!sta)
243 return;
244 if (sta_info_insert_rcu(sta)) {
245 rcu_read_unlock();
246 return;
247 }
248 }
249
250 sta->last_rx = jiffies;
251 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
252 if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN &&
253 sdata->u.mesh.accepting_plinks &&
254 sdata->u.mesh.mshcfg.auto_open_plinks)
255 mesh_plink_open(sta);
256
257 rcu_read_unlock();
258 }
259
260 static void mesh_plink_timer(unsigned long data)
261 {
262 struct sta_info *sta;
263 __le16 llid, plid, reason;
264 struct ieee80211_sub_if_data *sdata;
265
266 /*
267 * This STA is valid because sta_info_destroy() will
268 * del_timer_sync() this timer after having made sure
269 * it cannot be readded (by deleting the plink.)
270 */
271 sta = (struct sta_info *) data;
272
273 if (sta->sdata->local->quiescing) {
274 sta->plink_timer_was_running = true;
275 return;
276 }
277
278 spin_lock_bh(&sta->lock);
279 if (sta->ignore_plink_timer) {
280 sta->ignore_plink_timer = false;
281 spin_unlock_bh(&sta->lock);
282 return;
283 }
284 mpl_dbg("Mesh plink timer for %pM fired on state %d\n",
285 sta->sta.addr, sta->plink_state);
286 reason = 0;
287 llid = sta->llid;
288 plid = sta->plid;
289 sdata = sta->sdata;
290
291 switch (sta->plink_state) {
292 case PLINK_OPN_RCVD:
293 case PLINK_OPN_SNT:
294 /* retry timer */
295 if (sta->plink_retries < dot11MeshMaxRetries(sdata)) {
296 u32 rand;
297 mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n",
298 sta->sta.addr, sta->plink_retries,
299 sta->plink_timeout);
300 get_random_bytes(&rand, sizeof(u32));
301 sta->plink_timeout = sta->plink_timeout +
302 rand % sta->plink_timeout;
303 ++sta->plink_retries;
304 mod_plink_timer(sta, sta->plink_timeout);
305 spin_unlock_bh(&sta->lock);
306 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
307 0, 0);
308 break;
309 }
310 reason = cpu_to_le16(MESH_MAX_RETRIES);
311 /* fall through on else */
312 case PLINK_CNF_RCVD:
313 /* confirm timer */
314 if (!reason)
315 reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT);
316 sta->plink_state = PLINK_HOLDING;
317 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
318 spin_unlock_bh(&sta->lock);
319 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid,
320 reason);
321 break;
322 case PLINK_HOLDING:
323 /* holding timer */
324 del_timer(&sta->plink_timer);
325 mesh_plink_fsm_restart(sta);
326 spin_unlock_bh(&sta->lock);
327 break;
328 default:
329 spin_unlock_bh(&sta->lock);
330 break;
331 }
332 }
333
334 #ifdef CONFIG_PM
335 void mesh_plink_quiesce(struct sta_info *sta)
336 {
337 if (del_timer_sync(&sta->plink_timer))
338 sta->plink_timer_was_running = true;
339 }
340
341 void mesh_plink_restart(struct sta_info *sta)
342 {
343 if (sta->plink_timer_was_running) {
344 add_timer(&sta->plink_timer);
345 sta->plink_timer_was_running = false;
346 }
347 }
348 #endif
349
350 static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
351 {
352 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
353 sta->plink_timer.data = (unsigned long) sta;
354 sta->plink_timer.function = mesh_plink_timer;
355 sta->plink_timeout = timeout;
356 add_timer(&sta->plink_timer);
357 }
358
359 int mesh_plink_open(struct sta_info *sta)
360 {
361 __le16 llid;
362 struct ieee80211_sub_if_data *sdata = sta->sdata;
363
364 spin_lock_bh(&sta->lock);
365 get_random_bytes(&llid, 2);
366 sta->llid = llid;
367 if (sta->plink_state != PLINK_LISTEN) {
368 spin_unlock_bh(&sta->lock);
369 return -EBUSY;
370 }
371 sta->plink_state = PLINK_OPN_SNT;
372 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
373 spin_unlock_bh(&sta->lock);
374 mpl_dbg("Mesh plink: starting establishment with %pM\n",
375 sta->sta.addr);
376
377 return mesh_plink_frame_tx(sdata, PLINK_OPEN,
378 sta->sta.addr, llid, 0, 0);
379 }
380
381 void mesh_plink_block(struct sta_info *sta)
382 {
383 spin_lock_bh(&sta->lock);
384 __mesh_plink_deactivate(sta);
385 sta->plink_state = PLINK_BLOCKED;
386 spin_unlock_bh(&sta->lock);
387 }
388
389
390 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
391 size_t len, struct ieee80211_rx_status *rx_status)
392 {
393 struct ieee80211_local *local = sdata->local;
394 struct ieee802_11_elems elems;
395 struct sta_info *sta;
396 enum plink_event event;
397 enum plink_frame_type ftype;
398 size_t baselen;
399 u8 ie_len;
400 u8 *baseaddr;
401 __le16 plid, llid, reason;
402 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
403 static const char *mplstates[] = {
404 [PLINK_LISTEN] = "LISTEN",
405 [PLINK_OPN_SNT] = "OPN-SNT",
406 [PLINK_OPN_RCVD] = "OPN-RCVD",
407 [PLINK_CNF_RCVD] = "CNF_RCVD",
408 [PLINK_ESTAB] = "ESTAB",
409 [PLINK_HOLDING] = "HOLDING",
410 [PLINK_BLOCKED] = "BLOCKED"
411 };
412 #endif
413
414 /* need action_code, aux */
415 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
416 return;
417
418 if (is_multicast_ether_addr(mgmt->da)) {
419 mpl_dbg("Mesh plink: ignore frame from multicast address");
420 return;
421 }
422
423 baseaddr = mgmt->u.action.u.plink_action.variable;
424 baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt;
425 if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) {
426 baseaddr += 4;
427 baselen += 4;
428 }
429 ieee802_11_parse_elems(baseaddr, len - baselen, &elems);
430 if (!elems.peer_link) {
431 mpl_dbg("Mesh plink: missing necessary peer link ie\n");
432 return;
433 }
434
435 ftype = mgmt->u.action.u.plink_action.action_code;
436 ie_len = elems.peer_link_len;
437 if ((ftype == PLINK_OPEN && ie_len != 6) ||
438 (ftype == PLINK_CONFIRM && ie_len != 8) ||
439 (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) {
440 mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n",
441 ftype, ie_len);
442 return;
443 }
444
445 if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) {
446 mpl_dbg("Mesh plink: missing necessary ie\n");
447 return;
448 }
449 /* Note the lines below are correct, the llid in the frame is the plid
450 * from the point of view of this host.
451 */
452 memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2);
453 if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10))
454 memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2);
455
456 rcu_read_lock();
457
458 sta = sta_info_get(sdata, mgmt->sa);
459 if (!sta && ftype != PLINK_OPEN) {
460 mpl_dbg("Mesh plink: cls or cnf from unknown peer\n");
461 rcu_read_unlock();
462 return;
463 }
464
465 if (sta && sta->plink_state == PLINK_BLOCKED) {
466 rcu_read_unlock();
467 return;
468 }
469
470 /* Now we will figure out the appropriate event... */
471 event = PLINK_UNDEFINED;
472 if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) {
473 switch (ftype) {
474 case PLINK_OPEN:
475 event = OPN_RJCT;
476 break;
477 case PLINK_CONFIRM:
478 event = CNF_RJCT;
479 break;
480 case PLINK_CLOSE:
481 /* avoid warning */
482 break;
483 }
484 spin_lock_bh(&sta->lock);
485 } else if (!sta) {
486 /* ftype == PLINK_OPEN */
487 u32 rates;
488
489 rcu_read_unlock();
490
491 if (!mesh_plink_free_count(sdata)) {
492 mpl_dbg("Mesh plink error: no more free plinks\n");
493 return;
494 }
495
496 rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
497 sta = mesh_plink_alloc(sdata, mgmt->sa, rates);
498 if (!sta) {
499 mpl_dbg("Mesh plink error: plink table full\n");
500 return;
501 }
502 if (sta_info_insert_rcu(sta)) {
503 rcu_read_unlock();
504 return;
505 }
506 event = OPN_ACPT;
507 spin_lock_bh(&sta->lock);
508 } else {
509 spin_lock_bh(&sta->lock);
510 switch (ftype) {
511 case PLINK_OPEN:
512 if (!mesh_plink_free_count(sdata) ||
513 (sta->plid && sta->plid != plid))
514 event = OPN_IGNR;
515 else
516 event = OPN_ACPT;
517 break;
518 case PLINK_CONFIRM:
519 if (!mesh_plink_free_count(sdata) ||
520 (sta->llid != llid || sta->plid != plid))
521 event = CNF_IGNR;
522 else
523 event = CNF_ACPT;
524 break;
525 case PLINK_CLOSE:
526 if (sta->plink_state == PLINK_ESTAB)
527 /* Do not check for llid or plid. This does not
528 * follow the standard but since multiple plinks
529 * per sta are not supported, it is necessary in
530 * order to avoid a livelock when MP A sees an
531 * establish peer link to MP B but MP B does not
532 * see it. This can be caused by a timeout in
533 * B's peer link establishment or B beign
534 * restarted.
535 */
536 event = CLS_ACPT;
537 else if (sta->plid != plid)
538 event = CLS_IGNR;
539 else if (ie_len == 7 && sta->llid != llid)
540 event = CLS_IGNR;
541 else
542 event = CLS_ACPT;
543 break;
544 default:
545 mpl_dbg("Mesh plink: unknown frame subtype\n");
546 spin_unlock_bh(&sta->lock);
547 rcu_read_unlock();
548 return;
549 }
550 }
551
552 mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
553 mgmt->sa, mplstates[sta->plink_state],
554 le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
555 event);
556 reason = 0;
557 switch (sta->plink_state) {
558 /* spin_unlock as soon as state is updated at each case */
559 case PLINK_LISTEN:
560 switch (event) {
561 case CLS_ACPT:
562 mesh_plink_fsm_restart(sta);
563 spin_unlock_bh(&sta->lock);
564 break;
565 case OPN_ACPT:
566 sta->plink_state = PLINK_OPN_RCVD;
567 sta->plid = plid;
568 get_random_bytes(&llid, 2);
569 sta->llid = llid;
570 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
571 spin_unlock_bh(&sta->lock);
572 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
573 0, 0);
574 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr,
575 llid, plid, 0);
576 break;
577 default:
578 spin_unlock_bh(&sta->lock);
579 break;
580 }
581 break;
582
583 case PLINK_OPN_SNT:
584 switch (event) {
585 case OPN_RJCT:
586 case CNF_RJCT:
587 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
588 case CLS_ACPT:
589 if (!reason)
590 reason = cpu_to_le16(MESH_CLOSE_RCVD);
591 sta->reason = reason;
592 sta->plink_state = PLINK_HOLDING;
593 if (!mod_plink_timer(sta,
594 dot11MeshHoldingTimeout(sdata)))
595 sta->ignore_plink_timer = true;
596
597 llid = sta->llid;
598 spin_unlock_bh(&sta->lock);
599 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
600 plid, reason);
601 break;
602 case OPN_ACPT:
603 /* retry timer is left untouched */
604 sta->plink_state = PLINK_OPN_RCVD;
605 sta->plid = plid;
606 llid = sta->llid;
607 spin_unlock_bh(&sta->lock);
608 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
609 plid, 0);
610 break;
611 case CNF_ACPT:
612 sta->plink_state = PLINK_CNF_RCVD;
613 if (!mod_plink_timer(sta,
614 dot11MeshConfirmTimeout(sdata)))
615 sta->ignore_plink_timer = true;
616
617 spin_unlock_bh(&sta->lock);
618 break;
619 default:
620 spin_unlock_bh(&sta->lock);
621 break;
622 }
623 break;
624
625 case PLINK_OPN_RCVD:
626 switch (event) {
627 case OPN_RJCT:
628 case CNF_RJCT:
629 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
630 case CLS_ACPT:
631 if (!reason)
632 reason = cpu_to_le16(MESH_CLOSE_RCVD);
633 sta->reason = reason;
634 sta->plink_state = PLINK_HOLDING;
635 if (!mod_plink_timer(sta,
636 dot11MeshHoldingTimeout(sdata)))
637 sta->ignore_plink_timer = true;
638
639 llid = sta->llid;
640 spin_unlock_bh(&sta->lock);
641 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
642 plid, reason);
643 break;
644 case OPN_ACPT:
645 llid = sta->llid;
646 spin_unlock_bh(&sta->lock);
647 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
648 plid, 0);
649 break;
650 case CNF_ACPT:
651 del_timer(&sta->plink_timer);
652 sta->plink_state = PLINK_ESTAB;
653 mesh_plink_inc_estab_count(sdata);
654 spin_unlock_bh(&sta->lock);
655 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
656 sta->sta.addr);
657 break;
658 default:
659 spin_unlock_bh(&sta->lock);
660 break;
661 }
662 break;
663
664 case PLINK_CNF_RCVD:
665 switch (event) {
666 case OPN_RJCT:
667 case CNF_RJCT:
668 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
669 case CLS_ACPT:
670 if (!reason)
671 reason = cpu_to_le16(MESH_CLOSE_RCVD);
672 sta->reason = reason;
673 sta->plink_state = PLINK_HOLDING;
674 if (!mod_plink_timer(sta,
675 dot11MeshHoldingTimeout(sdata)))
676 sta->ignore_plink_timer = true;
677
678 llid = sta->llid;
679 spin_unlock_bh(&sta->lock);
680 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
681 plid, reason);
682 break;
683 case OPN_ACPT:
684 del_timer(&sta->plink_timer);
685 sta->plink_state = PLINK_ESTAB;
686 mesh_plink_inc_estab_count(sdata);
687 spin_unlock_bh(&sta->lock);
688 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
689 sta->sta.addr);
690 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
691 plid, 0);
692 break;
693 default:
694 spin_unlock_bh(&sta->lock);
695 break;
696 }
697 break;
698
699 case PLINK_ESTAB:
700 switch (event) {
701 case CLS_ACPT:
702 reason = cpu_to_le16(MESH_CLOSE_RCVD);
703 sta->reason = reason;
704 __mesh_plink_deactivate(sta);
705 sta->plink_state = PLINK_HOLDING;
706 llid = sta->llid;
707 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
708 spin_unlock_bh(&sta->lock);
709 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
710 plid, reason);
711 break;
712 case OPN_ACPT:
713 llid = sta->llid;
714 spin_unlock_bh(&sta->lock);
715 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
716 plid, 0);
717 break;
718 default:
719 spin_unlock_bh(&sta->lock);
720 break;
721 }
722 break;
723 case PLINK_HOLDING:
724 switch (event) {
725 case CLS_ACPT:
726 if (del_timer(&sta->plink_timer))
727 sta->ignore_plink_timer = 1;
728 mesh_plink_fsm_restart(sta);
729 spin_unlock_bh(&sta->lock);
730 break;
731 case OPN_ACPT:
732 case CNF_ACPT:
733 case OPN_RJCT:
734 case CNF_RJCT:
735 llid = sta->llid;
736 reason = sta->reason;
737 spin_unlock_bh(&sta->lock);
738 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr,
739 llid, plid, reason);
740 break;
741 default:
742 spin_unlock_bh(&sta->lock);
743 }
744 break;
745 default:
746 /* should not get here, PLINK_BLOCKED is dealt with at the
747 * beggining of the function
748 */
749 spin_unlock_bh(&sta->lock);
750 break;
751 }
752
753 rcu_read_unlock();
754 }
linux-next