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[linux-2.6/next.git] / net / mac80211 / mesh_plink.c
blobf4adc0917888d61f6ea033063af41b4c41f60f40
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/gfp.h>
10 #include <linux/kernel.h>
11 #include <linux/random.h>
12 #include "ieee80211_i.h"
13 #include "rate.h"
14 #include "mesh.h"
15
16 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
17 #define mpl_dbg(fmt, args...) printk(KERN_DEBUG fmt, ##args)
18 #else
19 #define mpl_dbg(fmt, args...) do { (void)(0); } while (0)
20 #endif
21
22 #define PLINK_GET_LLID(p) (p + 4)
23 #define PLINK_GET_PLID(p) (p + 6)
24
25 #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \
26 jiffies + HZ * t / 1000))
27
28 /* Peer link cancel reasons, all subject to ANA approval */
29 #define MESH_LINK_CANCELLED 2
30 #define MESH_MAX_NEIGHBORS 3
31 #define MESH_CAPABILITY_POLICY_VIOLATION 4
32 #define MESH_CLOSE_RCVD 5
33 #define MESH_MAX_RETRIES 6
34 #define MESH_CONFIRM_TIMEOUT 7
35 #define MESH_SECURITY_ROLE_NEGOTIATION_DIFFERS 8
36 #define MESH_SECURITY_AUTHENTICATION_IMPOSSIBLE 9
37 #define MESH_SECURITY_FAILED_VERIFICATION 10
38
39 #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries)
40 #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout)
41 #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout)
42 #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout)
43 #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks)
44
45 enum plink_frame_type {
46 PLINK_OPEN = 1,
47 PLINK_CONFIRM,
48 PLINK_CLOSE
49 };
50
51 enum plink_event {
52 PLINK_UNDEFINED,
53 OPN_ACPT,
54 OPN_RJCT,
55 OPN_IGNR,
56 CNF_ACPT,
57 CNF_RJCT,
58 CNF_IGNR,
59 CLS_ACPT,
60 CLS_IGNR
61 };
62
63 static inline
64 void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata)
65 {
66 atomic_inc(&sdata->u.mesh.mshstats.estab_plinks);
67 mesh_accept_plinks_update(sdata);
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 }
76
77 /**
78 * mesh_plink_fsm_restart - restart a mesh peer link finite state machine
79 *
80 * @sta: mesh peer link to restart
81 *
82 * Locking: this function must be called holding sta->lock
83 */
84 static inline void mesh_plink_fsm_restart(struct sta_info *sta)
85 {
86 sta->plink_state = NL80211_PLINK_LISTEN;
87 sta->llid = sta->plid = sta->reason = 0;
88 sta->plink_retries = 0;
89 }
90
91 /*
92 * NOTE: This is just an alias for sta_info_alloc(), see notes
93 * on it in the lifecycle management section!
94 */
95 static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata,
96 u8 *hw_addr, u32 rates)
97 {
98 struct ieee80211_local *local = sdata->local;
99 struct sta_info *sta;
100
101 if (local->num_sta >= MESH_MAX_PLINKS)
102 return NULL;
103
104 sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL);
105 if (!sta)
106 return NULL;
107
108 sta->flags = WLAN_STA_AUTHORIZED | WLAN_STA_AUTH;
109 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
110 rate_control_rate_init(sta);
111
112 return sta;
113 }
114
115 /**
116 * __mesh_plink_deactivate - deactivate mesh peer link
117 *
118 * @sta: mesh peer link to deactivate
119 *
120 * All mesh paths with this peer as next hop will be flushed
121 *
122 * Locking: the caller must hold sta->lock
123 */
124 static bool __mesh_plink_deactivate(struct sta_info *sta)
125 {
126 struct ieee80211_sub_if_data *sdata = sta->sdata;
127 bool deactivated = false;
128
129 if (sta->plink_state == NL80211_PLINK_ESTAB) {
130 mesh_plink_dec_estab_count(sdata);
131 deactivated = true;
132 }
133 sta->plink_state = NL80211_PLINK_BLOCKED;
134 mesh_path_flush_by_nexthop(sta);
135
136 return deactivated;
137 }
138
139 /**
140 * mesh_plink_deactivate - deactivate mesh peer link
141 *
142 * @sta: mesh peer link to deactivate
143 *
144 * All mesh paths with this peer as next hop will be flushed
145 */
146 void mesh_plink_deactivate(struct sta_info *sta)
147 {
148 struct ieee80211_sub_if_data *sdata = sta->sdata;
149 bool deactivated;
150
151 spin_lock_bh(&sta->lock);
152 deactivated = __mesh_plink_deactivate(sta);
153 spin_unlock_bh(&sta->lock);
154
155 if (deactivated)
156 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
157 }
158
159 static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata,
160 enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid,
161 __le16 reason) {
162 struct ieee80211_local *local = sdata->local;
163 struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400 +
164 sdata->u.mesh.ie_len);
165 struct ieee80211_mgmt *mgmt;
166 bool include_plid = false;
167 static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A };
168 u8 *pos;
169 int ie_len;
170
171 if (!skb)
172 return -1;
173 skb_reserve(skb, local->hw.extra_tx_headroom);
174 /* 25 is the size of the common mgmt part (24) plus the size of the
175 * common action part (1)
176 */
177 mgmt = (struct ieee80211_mgmt *)
178 skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action));
179 memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action));
180 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
181 IEEE80211_STYPE_ACTION);
182 memcpy(mgmt->da, da, ETH_ALEN);
183 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
184 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
185 mgmt->u.action.category = WLAN_CATEGORY_MESH_ACTION;
186 mgmt->u.action.u.plink_action.action_code = action;
187
188 if (action == PLINK_CLOSE)
189 mgmt->u.action.u.plink_action.aux = reason;
190 else {
191 mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0);
192 if (action == PLINK_CONFIRM) {
193 pos = skb_put(skb, 4);
194 /* two-byte status code followed by two-byte AID */
195 memset(pos, 0, 2);
196 memcpy(pos + 2, &plid, 2);
197 }
198 mesh_mgmt_ies_add(skb, sdata);
199 }
200
201 /* Add Peer Link Management element */
202 switch (action) {
203 case PLINK_OPEN:
204 ie_len = 6;
205 break;
206 case PLINK_CONFIRM:
207 ie_len = 8;
208 include_plid = true;
209 break;
210 case PLINK_CLOSE:
211 default:
212 if (!plid)
213 ie_len = 8;
214 else {
215 ie_len = 10;
216 include_plid = true;
217 }
218 break;
219 }
220
221 pos = skb_put(skb, 2 + ie_len);
222 *pos++ = WLAN_EID_PEER_LINK;
223 *pos++ = ie_len;
224 memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto));
225 pos += 4;
226 memcpy(pos, &llid, 2);
227 if (include_plid) {
228 pos += 2;
229 memcpy(pos, &plid, 2);
230 }
231 if (action == PLINK_CLOSE) {
232 pos += 2;
233 memcpy(pos, &reason, 2);
234 }
235
236 ieee80211_tx_skb(sdata, skb);
237 return 0;
238 }
239
240 void mesh_neighbour_update(u8 *hw_addr, u32 rates,
241 struct ieee80211_sub_if_data *sdata,
242 struct ieee802_11_elems *elems)
243 {
244 struct ieee80211_local *local = sdata->local;
245 struct sta_info *sta;
246
247 rcu_read_lock();
248
249 sta = sta_info_get(sdata, hw_addr);
250 if (!sta) {
251 rcu_read_unlock();
252 /* Userspace handles peer allocation when security is enabled
253 * */
254 if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED)
255 cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr,
256 elems->ie_start, elems->total_len,
257 GFP_KERNEL);
258 else
259 sta = mesh_plink_alloc(sdata, hw_addr, rates);
260 if (!sta)
261 return;
262 if (sta_info_insert_rcu(sta)) {
263 rcu_read_unlock();
264 return;
265 }
266 }
267
268 sta->last_rx = jiffies;
269 sta->sta.supp_rates[local->hw.conf.channel->band] = rates;
270 if (mesh_peer_accepts_plinks(elems) &&
271 sta->plink_state == NL80211_PLINK_LISTEN &&
272 sdata->u.mesh.accepting_plinks &&
273 sdata->u.mesh.mshcfg.auto_open_plinks)
274 mesh_plink_open(sta);
275
276 rcu_read_unlock();
277 }
278
279 static void mesh_plink_timer(unsigned long data)
280 {
281 struct sta_info *sta;
282 __le16 llid, plid, reason;
283 struct ieee80211_sub_if_data *sdata;
284
285 /*
286 * This STA is valid because sta_info_destroy() will
287 * del_timer_sync() this timer after having made sure
288 * it cannot be readded (by deleting the plink.)
289 */
290 sta = (struct sta_info *) data;
291
292 if (sta->sdata->local->quiescing) {
293 sta->plink_timer_was_running = true;
294 return;
295 }
296
297 spin_lock_bh(&sta->lock);
298 if (sta->ignore_plink_timer) {
299 sta->ignore_plink_timer = false;
300 spin_unlock_bh(&sta->lock);
301 return;
302 }
303 mpl_dbg("Mesh plink timer for %pM fired on state %d\n",
304 sta->sta.addr, sta->plink_state);
305 reason = 0;
306 llid = sta->llid;
307 plid = sta->plid;
308 sdata = sta->sdata;
309
310 switch (sta->plink_state) {
311 case NL80211_PLINK_OPN_RCVD:
312 case NL80211_PLINK_OPN_SNT:
313 /* retry timer */
314 if (sta->plink_retries < dot11MeshMaxRetries(sdata)) {
315 u32 rand;
316 mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n",
317 sta->sta.addr, sta->plink_retries,
318 sta->plink_timeout);
319 get_random_bytes(&rand, sizeof(u32));
320 sta->plink_timeout = sta->plink_timeout +
321 rand % sta->plink_timeout;
322 ++sta->plink_retries;
323 mod_plink_timer(sta, sta->plink_timeout);
324 spin_unlock_bh(&sta->lock);
325 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
326 0, 0);
327 break;
328 }
329 reason = cpu_to_le16(MESH_MAX_RETRIES);
330 /* fall through on else */
331 case NL80211_PLINK_CNF_RCVD:
332 /* confirm timer */
333 if (!reason)
334 reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT);
335 sta->plink_state = NL80211_PLINK_HOLDING;
336 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
337 spin_unlock_bh(&sta->lock);
338 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid,
339 reason);
340 break;
341 case NL80211_PLINK_HOLDING:
342 /* holding timer */
343 del_timer(&sta->plink_timer);
344 mesh_plink_fsm_restart(sta);
345 spin_unlock_bh(&sta->lock);
346 break;
347 default:
348 spin_unlock_bh(&sta->lock);
349 break;
350 }
351 }
352
353 #ifdef CONFIG_PM
354 void mesh_plink_quiesce(struct sta_info *sta)
355 {
356 if (del_timer_sync(&sta->plink_timer))
357 sta->plink_timer_was_running = true;
358 }
359
360 void mesh_plink_restart(struct sta_info *sta)
361 {
362 if (sta->plink_timer_was_running) {
363 add_timer(&sta->plink_timer);
364 sta->plink_timer_was_running = false;
365 }
366 }
367 #endif
368
369 static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout)
370 {
371 sta->plink_timer.expires = jiffies + (HZ * timeout / 1000);
372 sta->plink_timer.data = (unsigned long) sta;
373 sta->plink_timer.function = mesh_plink_timer;
374 sta->plink_timeout = timeout;
375 add_timer(&sta->plink_timer);
376 }
377
378 int mesh_plink_open(struct sta_info *sta)
379 {
380 __le16 llid;
381 struct ieee80211_sub_if_data *sdata = sta->sdata;
382
383 if (!test_sta_flags(sta, WLAN_STA_AUTH))
384 return -EPERM;
385
386 spin_lock_bh(&sta->lock);
387 get_random_bytes(&llid, 2);
388 sta->llid = llid;
389 if (sta->plink_state != NL80211_PLINK_LISTEN) {
390 spin_unlock_bh(&sta->lock);
391 return -EBUSY;
392 }
393 sta->plink_state = NL80211_PLINK_OPN_SNT;
394 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
395 spin_unlock_bh(&sta->lock);
396 mpl_dbg("Mesh plink: starting establishment with %pM\n",
397 sta->sta.addr);
398
399 return mesh_plink_frame_tx(sdata, PLINK_OPEN,
400 sta->sta.addr, llid, 0, 0);
401 }
402
403 void mesh_plink_block(struct sta_info *sta)
404 {
405 struct ieee80211_sub_if_data *sdata = sta->sdata;
406 bool deactivated;
407
408 spin_lock_bh(&sta->lock);
409 deactivated = __mesh_plink_deactivate(sta);
410 sta->plink_state = NL80211_PLINK_BLOCKED;
411 spin_unlock_bh(&sta->lock);
412
413 if (deactivated)
414 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
415 }
416
417
418 void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt,
419 size_t len, struct ieee80211_rx_status *rx_status)
420 {
421 struct ieee80211_local *local = sdata->local;
422 struct ieee802_11_elems elems;
423 struct sta_info *sta;
424 enum plink_event event;
425 enum plink_frame_type ftype;
426 size_t baselen;
427 bool deactivated, matches_local = true;
428 u8 ie_len;
429 u8 *baseaddr;
430 __le16 plid, llid, reason;
431 #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG
432 static const char *mplstates[] = {
433 [NL80211_PLINK_LISTEN] = "LISTEN",
434 [NL80211_PLINK_OPN_SNT] = "OPN-SNT",
435 [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD",
436 [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD",
437 [NL80211_PLINK_ESTAB] = "ESTAB",
438 [NL80211_PLINK_HOLDING] = "HOLDING",
439 [NL80211_PLINK_BLOCKED] = "BLOCKED"
440 };
441 #endif
442
443 /* need action_code, aux */
444 if (len < IEEE80211_MIN_ACTION_SIZE + 3)
445 return;
446
447 if (is_multicast_ether_addr(mgmt->da)) {
448 mpl_dbg("Mesh plink: ignore frame from multicast address");
449 return;
450 }
451
452 baseaddr = mgmt->u.action.u.plink_action.variable;
453 baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt;
454 if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) {
455 baseaddr += 4;
456 baselen += 4;
457 }
458 ieee802_11_parse_elems(baseaddr, len - baselen, &elems);
459 if (!elems.peer_link) {
460 mpl_dbg("Mesh plink: missing necessary peer link ie\n");
461 return;
462 }
463 if (elems.rsn_len &&
464 sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) {
465 mpl_dbg("Mesh plink: can't establish link with secure peer\n");
466 return;
467 }
468
469 ftype = mgmt->u.action.u.plink_action.action_code;
470 ie_len = elems.peer_link_len;
471 if ((ftype == PLINK_OPEN && ie_len != 6) ||
472 (ftype == PLINK_CONFIRM && ie_len != 8) ||
473 (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) {
474 mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n",
475 ftype, ie_len);
476 return;
477 }
478
479 if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) {
480 mpl_dbg("Mesh plink: missing necessary ie\n");
481 return;
482 }
483 /* Note the lines below are correct, the llid in the frame is the plid
484 * from the point of view of this host.
485 */
486 memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2);
487 if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10))
488 memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2);
489
490 rcu_read_lock();
491
492 sta = sta_info_get(sdata, mgmt->sa);
493 if (!sta && ftype != PLINK_OPEN) {
494 mpl_dbg("Mesh plink: cls or cnf from unknown peer\n");
495 rcu_read_unlock();
496 return;
497 }
498
499 if (sta && !test_sta_flags(sta, WLAN_STA_AUTH)) {
500 mpl_dbg("Mesh plink: Action frame from non-authed peer\n");
501 rcu_read_unlock();
502 return;
503 }
504
505 if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) {
506 rcu_read_unlock();
507 return;
508 }
509
510 /* Now we will figure out the appropriate event... */
511 event = PLINK_UNDEFINED;
512 if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) {
513 matches_local = false;
514 switch (ftype) {
515 case PLINK_OPEN:
516 event = OPN_RJCT;
517 break;
518 case PLINK_CONFIRM:
519 event = CNF_RJCT;
520 break;
521 case PLINK_CLOSE:
522 /* avoid warning */
523 break;
524 }
525 }
526
527 if (!sta && !matches_local) {
528 rcu_read_unlock();
529 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
530 llid = 0;
531 mesh_plink_frame_tx(sdata, PLINK_CLOSE, mgmt->sa, llid,
532 plid, reason);
533 return;
534 } else if (!sta) {
535 /* ftype == PLINK_OPEN */
536 u32 rates;
537
538 rcu_read_unlock();
539
540 if (!mesh_plink_free_count(sdata)) {
541 mpl_dbg("Mesh plink error: no more free plinks\n");
542 return;
543 }
544
545 rates = ieee80211_sta_get_rates(local, &elems, rx_status->band);
546 sta = mesh_plink_alloc(sdata, mgmt->sa, rates);
547 if (!sta) {
548 mpl_dbg("Mesh plink error: plink table full\n");
549 return;
550 }
551 if (sta_info_insert_rcu(sta)) {
552 rcu_read_unlock();
553 return;
554 }
555 event = OPN_ACPT;
556 spin_lock_bh(&sta->lock);
557 } else if (matches_local) {
558 spin_lock_bh(&sta->lock);
559 switch (ftype) {
560 case PLINK_OPEN:
561 if (!mesh_plink_free_count(sdata) ||
562 (sta->plid && sta->plid != plid))
563 event = OPN_IGNR;
564 else
565 event = OPN_ACPT;
566 break;
567 case PLINK_CONFIRM:
568 if (!mesh_plink_free_count(sdata) ||
569 (sta->llid != llid || sta->plid != plid))
570 event = CNF_IGNR;
571 else
572 event = CNF_ACPT;
573 break;
574 case PLINK_CLOSE:
575 if (sta->plink_state == NL80211_PLINK_ESTAB)
576 /* Do not check for llid or plid. This does not
577 * follow the standard but since multiple plinks
578 * per sta are not supported, it is necessary in
579 * order to avoid a livelock when MP A sees an
580 * establish peer link to MP B but MP B does not
581 * see it. This can be caused by a timeout in
582 * B's peer link establishment or B beign
583 * restarted.
584 */
585 event = CLS_ACPT;
586 else if (sta->plid != plid)
587 event = CLS_IGNR;
588 else if (ie_len == 7 && sta->llid != llid)
589 event = CLS_IGNR;
590 else
591 event = CLS_ACPT;
592 break;
593 default:
594 mpl_dbg("Mesh plink: unknown frame subtype\n");
595 spin_unlock_bh(&sta->lock);
596 rcu_read_unlock();
597 return;
598 }
599 } else {
600 spin_lock_bh(&sta->lock);
601 }
602
603 mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n",
604 mgmt->sa, mplstates[sta->plink_state],
605 le16_to_cpu(sta->llid), le16_to_cpu(sta->plid),
606 event);
607 reason = 0;
608 switch (sta->plink_state) {
609 /* spin_unlock as soon as state is updated at each case */
610 case NL80211_PLINK_LISTEN:
611 switch (event) {
612 case CLS_ACPT:
613 mesh_plink_fsm_restart(sta);
614 spin_unlock_bh(&sta->lock);
615 break;
616 case OPN_ACPT:
617 sta->plink_state = NL80211_PLINK_OPN_RCVD;
618 sta->plid = plid;
619 get_random_bytes(&llid, 2);
620 sta->llid = llid;
621 mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata));
622 spin_unlock_bh(&sta->lock);
623 mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid,
624 0, 0);
625 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr,
626 llid, plid, 0);
627 break;
628 default:
629 spin_unlock_bh(&sta->lock);
630 break;
631 }
632 break;
633
634 case NL80211_PLINK_OPN_SNT:
635 switch (event) {
636 case OPN_RJCT:
637 case CNF_RJCT:
638 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
639 case CLS_ACPT:
640 if (!reason)
641 reason = cpu_to_le16(MESH_CLOSE_RCVD);
642 sta->reason = reason;
643 sta->plink_state = NL80211_PLINK_HOLDING;
644 if (!mod_plink_timer(sta,
645 dot11MeshHoldingTimeout(sdata)))
646 sta->ignore_plink_timer = true;
647
648 llid = sta->llid;
649 spin_unlock_bh(&sta->lock);
650 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
651 plid, reason);
652 break;
653 case OPN_ACPT:
654 /* retry timer is left untouched */
655 sta->plink_state = NL80211_PLINK_OPN_RCVD;
656 sta->plid = plid;
657 llid = sta->llid;
658 spin_unlock_bh(&sta->lock);
659 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
660 plid, 0);
661 break;
662 case CNF_ACPT:
663 sta->plink_state = NL80211_PLINK_CNF_RCVD;
664 if (!mod_plink_timer(sta,
665 dot11MeshConfirmTimeout(sdata)))
666 sta->ignore_plink_timer = true;
667
668 spin_unlock_bh(&sta->lock);
669 break;
670 default:
671 spin_unlock_bh(&sta->lock);
672 break;
673 }
674 break;
675
676 case NL80211_PLINK_OPN_RCVD:
677 switch (event) {
678 case OPN_RJCT:
679 case CNF_RJCT:
680 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
681 case CLS_ACPT:
682 if (!reason)
683 reason = cpu_to_le16(MESH_CLOSE_RCVD);
684 sta->reason = reason;
685 sta->plink_state = NL80211_PLINK_HOLDING;
686 if (!mod_plink_timer(sta,
687 dot11MeshHoldingTimeout(sdata)))
688 sta->ignore_plink_timer = true;
689
690 llid = sta->llid;
691 spin_unlock_bh(&sta->lock);
692 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
693 plid, reason);
694 break;
695 case OPN_ACPT:
696 llid = sta->llid;
697 spin_unlock_bh(&sta->lock);
698 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
699 plid, 0);
700 break;
701 case CNF_ACPT:
702 del_timer(&sta->plink_timer);
703 sta->plink_state = NL80211_PLINK_ESTAB;
704 spin_unlock_bh(&sta->lock);
705 mesh_plink_inc_estab_count(sdata);
706 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
707 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
708 sta->sta.addr);
709 break;
710 default:
711 spin_unlock_bh(&sta->lock);
712 break;
713 }
714 break;
715
716 case NL80211_PLINK_CNF_RCVD:
717 switch (event) {
718 case OPN_RJCT:
719 case CNF_RJCT:
720 reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION);
721 case CLS_ACPT:
722 if (!reason)
723 reason = cpu_to_le16(MESH_CLOSE_RCVD);
724 sta->reason = reason;
725 sta->plink_state = NL80211_PLINK_HOLDING;
726 if (!mod_plink_timer(sta,
727 dot11MeshHoldingTimeout(sdata)))
728 sta->ignore_plink_timer = true;
729
730 llid = sta->llid;
731 spin_unlock_bh(&sta->lock);
732 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
733 plid, reason);
734 break;
735 case OPN_ACPT:
736 del_timer(&sta->plink_timer);
737 sta->plink_state = NL80211_PLINK_ESTAB;
738 spin_unlock_bh(&sta->lock);
739 mesh_plink_inc_estab_count(sdata);
740 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
741 mpl_dbg("Mesh plink with %pM ESTABLISHED\n",
742 sta->sta.addr);
743 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
744 plid, 0);
745 break;
746 default:
747 spin_unlock_bh(&sta->lock);
748 break;
749 }
750 break;
751
752 case NL80211_PLINK_ESTAB:
753 switch (event) {
754 case CLS_ACPT:
755 reason = cpu_to_le16(MESH_CLOSE_RCVD);
756 sta->reason = reason;
757 deactivated = __mesh_plink_deactivate(sta);
758 sta->plink_state = NL80211_PLINK_HOLDING;
759 llid = sta->llid;
760 mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata));
761 spin_unlock_bh(&sta->lock);
762 if (deactivated)
763 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON);
764 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid,
765 plid, reason);
766 break;
767 case OPN_ACPT:
768 llid = sta->llid;
769 spin_unlock_bh(&sta->lock);
770 mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid,
771 plid, 0);
772 break;
773 default:
774 spin_unlock_bh(&sta->lock);
775 break;
776 }
777 break;
778 case NL80211_PLINK_HOLDING:
779 switch (event) {
780 case CLS_ACPT:
781 if (del_timer(&sta->plink_timer))
782 sta->ignore_plink_timer = 1;
783 mesh_plink_fsm_restart(sta);
784 spin_unlock_bh(&sta->lock);
785 break;
786 case OPN_ACPT:
787 case CNF_ACPT:
788 case OPN_RJCT:
789 case CNF_RJCT:
790 llid = sta->llid;
791 reason = sta->reason;
792 spin_unlock_bh(&sta->lock);
793 mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr,
794 llid, plid, reason);
795 break;
796 default:
797 spin_unlock_bh(&sta->lock);
798 }
799 break;
800 default:
801 /* should not get here, PLINK_BLOCKED is dealt with at the
802 * beginning of the function
803 */
804 spin_unlock_bh(&sta->lock);
805 break;
806 }
807
808 rcu_read_unlock();
809 }
linux-next