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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 = 0, |
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 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
69 | } |
70 | |
71 | static inline |
72 | void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata) |
73 | { |
74 | atomic_dec(&sdata->u.mesh.mshstats.estab_plinks); |
75 | mesh_accept_plinks_update(sdata); |
76 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); |
77 | } |
78 | |
79 | /** |
80 | * mesh_plink_fsm_restart - restart a mesh peer link finite state machine |
81 | * |
82 | * @sta: mesh peer link to restart |
83 | * |
84 | * Locking: this function must be called holding sta->lock |
85 | */ |
86 | static inline void mesh_plink_fsm_restart(struct sta_info *sta) |
87 | { |
88 | sta->plink_state = PLINK_LISTEN; |
89 | sta->llid = sta->plid = sta->reason = 0; |
90 | sta->plink_retries = 0; |
91 | } |
92 | |
93 | /* |
94 | * NOTE: This is just an alias for sta_info_alloc(), see notes |
95 | * on it in the lifecycle management section! |
96 | */ |
97 | static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata, |
98 | u8 *hw_addr, u32 rates) |
99 | { |
100 | struct ieee80211_local *local = sdata->local; |
101 | struct sta_info *sta; |
102 | |
103 | if (local->num_sta >= MESH_MAX_PLINKS) |
104 | return NULL; |
105 | |
106 | sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL); |
107 | if (!sta) |
108 | return NULL; |
109 | |
110 | sta->flags = WLAN_STA_AUTHORIZED; |
111 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
112 | rate_control_rate_init(sta); |
113 | |
114 | return sta; |
115 | } |
116 | |
117 | /** |
118 | * mesh_plink_deactivate - deactivate mesh peer link |
119 | * |
120 | * @sta: mesh peer link to deactivate |
121 | * |
122 | * All mesh paths with this peer as next hop will be flushed |
123 | * |
124 | * Locking: the caller must hold sta->lock |
125 | */ |
126 | static void __mesh_plink_deactivate(struct sta_info *sta) |
127 | { |
128 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
129 | |
130 | if (sta->plink_state == PLINK_ESTAB) |
131 | mesh_plink_dec_estab_count(sdata); |
132 | sta->plink_state = PLINK_BLOCKED; |
133 | mesh_path_flush_by_nexthop(sta); |
134 | } |
135 | |
136 | /** |
137 | * __mesh_plink_deactivate - deactivate mesh peer link |
138 | * |
139 | * @sta: mesh peer link to deactivate |
140 | * |
141 | * All mesh paths with this peer as next hop will be flushed |
142 | */ |
143 | void mesh_plink_deactivate(struct sta_info *sta) |
144 | { |
145 | spin_lock_bh(&sta->lock); |
146 | __mesh_plink_deactivate(sta); |
147 | spin_unlock_bh(&sta->lock); |
148 | } |
149 | |
150 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
151 | enum plink_frame_type action, u8 *da, __le16 llid, __le16 plid, |
152 | __le16 reason) { |
153 | struct ieee80211_local *local = sdata->local; |
154 | struct sk_buff *skb = dev_alloc_skb(local->hw.extra_tx_headroom + 400); |
155 | struct ieee80211_mgmt *mgmt; |
156 | bool include_plid = false; |
157 | static const u8 meshpeeringproto[] = { 0x00, 0x0F, 0xAC, 0x2A }; |
158 | u8 *pos; |
159 | int ie_len; |
160 | |
161 | if (!skb) |
162 | return -1; |
163 | skb_reserve(skb, local->hw.extra_tx_headroom); |
164 | /* 25 is the size of the common mgmt part (24) plus the size of the |
165 | * common action part (1) |
166 | */ |
167 | mgmt = (struct ieee80211_mgmt *) |
168 | skb_put(skb, 25 + sizeof(mgmt->u.action.u.plink_action)); |
169 | memset(mgmt, 0, 25 + sizeof(mgmt->u.action.u.plink_action)); |
170 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
171 | IEEE80211_STYPE_ACTION); |
172 | memcpy(mgmt->da, da, ETH_ALEN); |
173 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
174 | /* BSSID is left zeroed, wildcard value */ |
175 | mgmt->u.action.category = MESH_PLINK_CATEGORY; |
176 | mgmt->u.action.u.plink_action.action_code = action; |
177 | |
178 | if (action == PLINK_CLOSE) |
179 | mgmt->u.action.u.plink_action.aux = reason; |
180 | else { |
181 | mgmt->u.action.u.plink_action.aux = cpu_to_le16(0x0); |
182 | if (action == PLINK_CONFIRM) { |
183 | pos = skb_put(skb, 4); |
184 | /* two-byte status code followed by two-byte AID */ |
185 | memset(pos, 0, 2); |
186 | memcpy(pos + 2, &plid, 2); |
187 | } |
188 | mesh_mgmt_ies_add(skb, sdata); |
189 | } |
190 | |
191 | /* Add Peer Link Management element */ |
192 | switch (action) { |
193 | case PLINK_OPEN: |
194 | ie_len = 6; |
195 | break; |
196 | case PLINK_CONFIRM: |
197 | ie_len = 8; |
198 | include_plid = true; |
199 | break; |
200 | case PLINK_CLOSE: |
201 | default: |
202 | if (!plid) |
203 | ie_len = 8; |
204 | else { |
205 | ie_len = 10; |
206 | include_plid = true; |
207 | } |
208 | break; |
209 | } |
210 | |
211 | pos = skb_put(skb, 2 + ie_len); |
212 | *pos++ = WLAN_EID_PEER_LINK; |
213 | *pos++ = ie_len; |
214 | memcpy(pos, meshpeeringproto, sizeof(meshpeeringproto)); |
215 | pos += 4; |
216 | memcpy(pos, &llid, 2); |
217 | if (include_plid) { |
218 | pos += 2; |
219 | memcpy(pos, &plid, 2); |
220 | } |
221 | if (action == PLINK_CLOSE) { |
222 | pos += 2; |
223 | memcpy(pos, &reason, 2); |
224 | } |
225 | |
226 | ieee80211_tx_skb(sdata, skb); |
227 | return 0; |
228 | } |
229 | |
230 | void mesh_neighbour_update(u8 *hw_addr, u32 rates, struct ieee80211_sub_if_data *sdata, |
231 | bool peer_accepting_plinks) |
232 | { |
233 | struct ieee80211_local *local = sdata->local; |
234 | struct sta_info *sta; |
235 | |
236 | rcu_read_lock(); |
237 | |
238 | sta = sta_info_get(sdata, hw_addr); |
239 | if (!sta) { |
240 | rcu_read_unlock(); |
241 | |
242 | sta = mesh_plink_alloc(sdata, hw_addr, rates); |
243 | if (!sta) |
244 | return; |
245 | if (sta_info_insert_rcu(sta)) { |
246 | rcu_read_unlock(); |
247 | return; |
248 | } |
249 | } |
250 | |
251 | sta->last_rx = jiffies; |
252 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
253 | if (peer_accepting_plinks && sta->plink_state == PLINK_LISTEN && |
254 | sdata->u.mesh.accepting_plinks && |
255 | sdata->u.mesh.mshcfg.auto_open_plinks) |
256 | mesh_plink_open(sta); |
257 | |
258 | rcu_read_unlock(); |
259 | } |
260 | |
261 | static void mesh_plink_timer(unsigned long data) |
262 | { |
263 | struct sta_info *sta; |
264 | __le16 llid, plid, reason; |
265 | struct ieee80211_sub_if_data *sdata; |
266 | |
267 | /* |
268 | * This STA is valid because sta_info_destroy() will |
269 | * del_timer_sync() this timer after having made sure |
270 | * it cannot be readded (by deleting the plink.) |
271 | */ |
272 | sta = (struct sta_info *) data; |
273 | |
274 | if (sta->sdata->local->quiescing) { |
275 | sta->plink_timer_was_running = true; |
276 | return; |
277 | } |
278 | |
279 | spin_lock_bh(&sta->lock); |
280 | if (sta->ignore_plink_timer) { |
281 | sta->ignore_plink_timer = false; |
282 | spin_unlock_bh(&sta->lock); |
283 | return; |
284 | } |
285 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
286 | sta->sta.addr, sta->plink_state); |
287 | reason = 0; |
288 | llid = sta->llid; |
289 | plid = sta->plid; |
290 | sdata = sta->sdata; |
291 | |
292 | switch (sta->plink_state) { |
293 | case PLINK_OPN_RCVD: |
294 | case PLINK_OPN_SNT: |
295 | /* retry timer */ |
296 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { |
297 | u32 rand; |
298 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
299 | sta->sta.addr, sta->plink_retries, |
300 | sta->plink_timeout); |
301 | get_random_bytes(&rand, sizeof(u32)); |
302 | sta->plink_timeout = sta->plink_timeout + |
303 | rand % sta->plink_timeout; |
304 | ++sta->plink_retries; |
305 | mod_plink_timer(sta, sta->plink_timeout); |
306 | spin_unlock_bh(&sta->lock); |
307 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
308 | 0, 0); |
309 | break; |
310 | } |
311 | reason = cpu_to_le16(MESH_MAX_RETRIES); |
312 | /* fall through on else */ |
313 | case PLINK_CNF_RCVD: |
314 | /* confirm timer */ |
315 | if (!reason) |
316 | reason = cpu_to_le16(MESH_CONFIRM_TIMEOUT); |
317 | sta->plink_state = PLINK_HOLDING; |
318 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
319 | spin_unlock_bh(&sta->lock); |
320 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, plid, |
321 | reason); |
322 | break; |
323 | case PLINK_HOLDING: |
324 | /* holding timer */ |
325 | del_timer(&sta->plink_timer); |
326 | mesh_plink_fsm_restart(sta); |
327 | spin_unlock_bh(&sta->lock); |
328 | break; |
329 | default: |
330 | spin_unlock_bh(&sta->lock); |
331 | break; |
332 | } |
333 | } |
334 | |
335 | #ifdef CONFIG_PM |
336 | void mesh_plink_quiesce(struct sta_info *sta) |
337 | { |
338 | if (del_timer_sync(&sta->plink_timer)) |
339 | sta->plink_timer_was_running = true; |
340 | } |
341 | |
342 | void mesh_plink_restart(struct sta_info *sta) |
343 | { |
344 | if (sta->plink_timer_was_running) { |
345 | add_timer(&sta->plink_timer); |
346 | sta->plink_timer_was_running = false; |
347 | } |
348 | } |
349 | #endif |
350 | |
351 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
352 | { |
353 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); |
354 | sta->plink_timer.data = (unsigned long) sta; |
355 | sta->plink_timer.function = mesh_plink_timer; |
356 | sta->plink_timeout = timeout; |
357 | add_timer(&sta->plink_timer); |
358 | } |
359 | |
360 | int mesh_plink_open(struct sta_info *sta) |
361 | { |
362 | __le16 llid; |
363 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
364 | |
365 | spin_lock_bh(&sta->lock); |
366 | get_random_bytes(&llid, 2); |
367 | sta->llid = llid; |
368 | if (sta->plink_state != PLINK_LISTEN) { |
369 | spin_unlock_bh(&sta->lock); |
370 | return -EBUSY; |
371 | } |
372 | sta->plink_state = PLINK_OPN_SNT; |
373 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
374 | spin_unlock_bh(&sta->lock); |
375 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
376 | sta->sta.addr); |
377 | |
378 | return mesh_plink_frame_tx(sdata, PLINK_OPEN, |
379 | sta->sta.addr, llid, 0, 0); |
380 | } |
381 | |
382 | void mesh_plink_block(struct sta_info *sta) |
383 | { |
384 | spin_lock_bh(&sta->lock); |
385 | __mesh_plink_deactivate(sta); |
386 | sta->plink_state = PLINK_BLOCKED; |
387 | spin_unlock_bh(&sta->lock); |
388 | } |
389 | |
390 | |
391 | void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, |
392 | size_t len, struct ieee80211_rx_status *rx_status) |
393 | { |
394 | struct ieee80211_local *local = sdata->local; |
395 | struct ieee802_11_elems elems; |
396 | struct sta_info *sta; |
397 | enum plink_event event; |
398 | enum plink_frame_type ftype; |
399 | size_t baselen; |
400 | u8 ie_len; |
401 | u8 *baseaddr; |
402 | __le16 plid, llid, reason; |
403 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
404 | static const char *mplstates[] = { |
405 | [PLINK_LISTEN] = "LISTEN", |
406 | [PLINK_OPN_SNT] = "OPN-SNT", |
407 | [PLINK_OPN_RCVD] = "OPN-RCVD", |
408 | [PLINK_CNF_RCVD] = "CNF_RCVD", |
409 | [PLINK_ESTAB] = "ESTAB", |
410 | [PLINK_HOLDING] = "HOLDING", |
411 | [PLINK_BLOCKED] = "BLOCKED" |
412 | }; |
413 | #endif |
414 | |
415 | /* need action_code, aux */ |
416 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) |
417 | return; |
418 | |
419 | if (is_multicast_ether_addr(mgmt->da)) { |
420 | mpl_dbg("Mesh plink: ignore frame from multicast address"); |
421 | return; |
422 | } |
423 | |
424 | baseaddr = mgmt->u.action.u.plink_action.variable; |
425 | baselen = (u8 *) mgmt->u.action.u.plink_action.variable - (u8 *) mgmt; |
426 | if (mgmt->u.action.u.plink_action.action_code == PLINK_CONFIRM) { |
427 | baseaddr += 4; |
428 | baselen += 4; |
429 | } |
430 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); |
431 | if (!elems.peer_link) { |
432 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
433 | return; |
434 | } |
435 | |
436 | ftype = mgmt->u.action.u.plink_action.action_code; |
437 | ie_len = elems.peer_link_len; |
438 | if ((ftype == PLINK_OPEN && ie_len != 6) || |
439 | (ftype == PLINK_CONFIRM && ie_len != 8) || |
440 | (ftype == PLINK_CLOSE && ie_len != 8 && ie_len != 10)) { |
441 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
442 | ftype, ie_len); |
443 | return; |
444 | } |
445 | |
446 | if (ftype != PLINK_CLOSE && (!elems.mesh_id || !elems.mesh_config)) { |
447 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
448 | return; |
449 | } |
450 | /* Note the lines below are correct, the llid in the frame is the plid |
451 | * from the point of view of this host. |
452 | */ |
453 | memcpy(&plid, PLINK_GET_LLID(elems.peer_link), 2); |
454 | if (ftype == PLINK_CONFIRM || (ftype == PLINK_CLOSE && ie_len == 10)) |
455 | memcpy(&llid, PLINK_GET_PLID(elems.peer_link), 2); |
456 | |
457 | rcu_read_lock(); |
458 | |
459 | sta = sta_info_get(sdata, mgmt->sa); |
460 | if (!sta && ftype != PLINK_OPEN) { |
461 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
462 | rcu_read_unlock(); |
463 | return; |
464 | } |
465 | |
466 | if (sta && sta->plink_state == PLINK_BLOCKED) { |
467 | rcu_read_unlock(); |
468 | return; |
469 | } |
470 | |
471 | /* Now we will figure out the appropriate event... */ |
472 | event = PLINK_UNDEFINED; |
473 | if (ftype != PLINK_CLOSE && (!mesh_matches_local(&elems, sdata))) { |
474 | switch (ftype) { |
475 | case PLINK_OPEN: |
476 | event = OPN_RJCT; |
477 | break; |
478 | case PLINK_CONFIRM: |
479 | event = CNF_RJCT; |
480 | break; |
481 | case PLINK_CLOSE: |
482 | /* avoid warning */ |
483 | break; |
484 | } |
485 | spin_lock_bh(&sta->lock); |
486 | } else if (!sta) { |
487 | /* ftype == PLINK_OPEN */ |
488 | u32 rates; |
489 | |
490 | rcu_read_unlock(); |
491 | |
492 | if (!mesh_plink_free_count(sdata)) { |
493 | mpl_dbg("Mesh plink error: no more free plinks\n"); |
494 | return; |
495 | } |
496 | |
497 | rates = ieee80211_sta_get_rates(local, &elems, rx_status->band); |
498 | sta = mesh_plink_alloc(sdata, mgmt->sa, rates); |
499 | if (!sta) { |
500 | mpl_dbg("Mesh plink error: plink table full\n"); |
501 | return; |
502 | } |
503 | if (sta_info_insert_rcu(sta)) { |
504 | rcu_read_unlock(); |
505 | return; |
506 | } |
507 | event = OPN_ACPT; |
508 | spin_lock_bh(&sta->lock); |
509 | } else { |
510 | spin_lock_bh(&sta->lock); |
511 | switch (ftype) { |
512 | case PLINK_OPEN: |
513 | if (!mesh_plink_free_count(sdata) || |
514 | (sta->plid && sta->plid != plid)) |
515 | event = OPN_IGNR; |
516 | else |
517 | event = OPN_ACPT; |
518 | break; |
519 | case PLINK_CONFIRM: |
520 | if (!mesh_plink_free_count(sdata) || |
521 | (sta->llid != llid || sta->plid != plid)) |
522 | event = CNF_IGNR; |
523 | else |
524 | event = CNF_ACPT; |
525 | break; |
526 | case PLINK_CLOSE: |
527 | if (sta->plink_state == PLINK_ESTAB) |
528 | /* Do not check for llid or plid. This does not |
529 | * follow the standard but since multiple plinks |
530 | * per sta are not supported, it is necessary in |
531 | * order to avoid a livelock when MP A sees an |
532 | * establish peer link to MP B but MP B does not |
533 | * see it. This can be caused by a timeout in |
534 | * B's peer link establishment or B beign |
535 | * restarted. |
536 | */ |
537 | event = CLS_ACPT; |
538 | else if (sta->plid != plid) |
539 | event = CLS_IGNR; |
540 | else if (ie_len == 7 && sta->llid != llid) |
541 | event = CLS_IGNR; |
542 | else |
543 | event = CLS_ACPT; |
544 | break; |
545 | default: |
546 | mpl_dbg("Mesh plink: unknown frame subtype\n"); |
547 | spin_unlock_bh(&sta->lock); |
548 | rcu_read_unlock(); |
549 | return; |
550 | } |
551 | } |
552 | |
553 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
554 | mgmt->sa, mplstates[sta->plink_state], |
555 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
556 | event); |
557 | reason = 0; |
558 | switch (sta->plink_state) { |
559 | /* spin_unlock as soon as state is updated at each case */ |
560 | case PLINK_LISTEN: |
561 | switch (event) { |
562 | case CLS_ACPT: |
563 | mesh_plink_fsm_restart(sta); |
564 | spin_unlock_bh(&sta->lock); |
565 | break; |
566 | case OPN_ACPT: |
567 | sta->plink_state = PLINK_OPN_RCVD; |
568 | sta->plid = plid; |
569 | get_random_bytes(&llid, 2); |
570 | sta->llid = llid; |
571 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
572 | spin_unlock_bh(&sta->lock); |
573 | mesh_plink_frame_tx(sdata, PLINK_OPEN, sta->sta.addr, llid, |
574 | 0, 0); |
575 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, |
576 | llid, plid, 0); |
577 | break; |
578 | default: |
579 | spin_unlock_bh(&sta->lock); |
580 | break; |
581 | } |
582 | break; |
583 | |
584 | case PLINK_OPN_SNT: |
585 | switch (event) { |
586 | case OPN_RJCT: |
587 | case CNF_RJCT: |
588 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
589 | case CLS_ACPT: |
590 | if (!reason) |
591 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
592 | sta->reason = reason; |
593 | sta->plink_state = PLINK_HOLDING; |
594 | if (!mod_plink_timer(sta, |
595 | dot11MeshHoldingTimeout(sdata))) |
596 | sta->ignore_plink_timer = true; |
597 | |
598 | llid = sta->llid; |
599 | spin_unlock_bh(&sta->lock); |
600 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
601 | plid, reason); |
602 | break; |
603 | case OPN_ACPT: |
604 | /* retry timer is left untouched */ |
605 | sta->plink_state = PLINK_OPN_RCVD; |
606 | sta->plid = plid; |
607 | llid = sta->llid; |
608 | spin_unlock_bh(&sta->lock); |
609 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
610 | plid, 0); |
611 | break; |
612 | case CNF_ACPT: |
613 | sta->plink_state = PLINK_CNF_RCVD; |
614 | if (!mod_plink_timer(sta, |
615 | dot11MeshConfirmTimeout(sdata))) |
616 | sta->ignore_plink_timer = true; |
617 | |
618 | spin_unlock_bh(&sta->lock); |
619 | break; |
620 | default: |
621 | spin_unlock_bh(&sta->lock); |
622 | break; |
623 | } |
624 | break; |
625 | |
626 | case PLINK_OPN_RCVD: |
627 | switch (event) { |
628 | case OPN_RJCT: |
629 | case CNF_RJCT: |
630 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
631 | case CLS_ACPT: |
632 | if (!reason) |
633 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
634 | sta->reason = reason; |
635 | sta->plink_state = PLINK_HOLDING; |
636 | if (!mod_plink_timer(sta, |
637 | dot11MeshHoldingTimeout(sdata))) |
638 | sta->ignore_plink_timer = true; |
639 | |
640 | llid = sta->llid; |
641 | spin_unlock_bh(&sta->lock); |
642 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
643 | plid, reason); |
644 | break; |
645 | case OPN_ACPT: |
646 | llid = sta->llid; |
647 | spin_unlock_bh(&sta->lock); |
648 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
649 | plid, 0); |
650 | break; |
651 | case CNF_ACPT: |
652 | del_timer(&sta->plink_timer); |
653 | sta->plink_state = PLINK_ESTAB; |
654 | mesh_plink_inc_estab_count(sdata); |
655 | spin_unlock_bh(&sta->lock); |
656 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
657 | sta->sta.addr); |
658 | break; |
659 | default: |
660 | spin_unlock_bh(&sta->lock); |
661 | break; |
662 | } |
663 | break; |
664 | |
665 | case PLINK_CNF_RCVD: |
666 | switch (event) { |
667 | case OPN_RJCT: |
668 | case CNF_RJCT: |
669 | reason = cpu_to_le16(MESH_CAPABILITY_POLICY_VIOLATION); |
670 | case CLS_ACPT: |
671 | if (!reason) |
672 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
673 | sta->reason = reason; |
674 | sta->plink_state = PLINK_HOLDING; |
675 | if (!mod_plink_timer(sta, |
676 | dot11MeshHoldingTimeout(sdata))) |
677 | sta->ignore_plink_timer = true; |
678 | |
679 | llid = sta->llid; |
680 | spin_unlock_bh(&sta->lock); |
681 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
682 | plid, reason); |
683 | break; |
684 | case OPN_ACPT: |
685 | del_timer(&sta->plink_timer); |
686 | sta->plink_state = PLINK_ESTAB; |
687 | mesh_plink_inc_estab_count(sdata); |
688 | spin_unlock_bh(&sta->lock); |
689 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
690 | sta->sta.addr); |
691 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
692 | plid, 0); |
693 | break; |
694 | default: |
695 | spin_unlock_bh(&sta->lock); |
696 | break; |
697 | } |
698 | break; |
699 | |
700 | case PLINK_ESTAB: |
701 | switch (event) { |
702 | case CLS_ACPT: |
703 | reason = cpu_to_le16(MESH_CLOSE_RCVD); |
704 | sta->reason = reason; |
705 | __mesh_plink_deactivate(sta); |
706 | sta->plink_state = PLINK_HOLDING; |
707 | llid = sta->llid; |
708 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
709 | spin_unlock_bh(&sta->lock); |
710 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, llid, |
711 | plid, reason); |
712 | break; |
713 | case OPN_ACPT: |
714 | llid = sta->llid; |
715 | spin_unlock_bh(&sta->lock); |
716 | mesh_plink_frame_tx(sdata, PLINK_CONFIRM, sta->sta.addr, llid, |
717 | plid, 0); |
718 | break; |
719 | default: |
720 | spin_unlock_bh(&sta->lock); |
721 | break; |
722 | } |
723 | break; |
724 | case PLINK_HOLDING: |
725 | switch (event) { |
726 | case CLS_ACPT: |
727 | if (del_timer(&sta->plink_timer)) |
728 | sta->ignore_plink_timer = 1; |
729 | mesh_plink_fsm_restart(sta); |
730 | spin_unlock_bh(&sta->lock); |
731 | break; |
732 | case OPN_ACPT: |
733 | case CNF_ACPT: |
734 | case OPN_RJCT: |
735 | case CNF_RJCT: |
736 | llid = sta->llid; |
737 | reason = sta->reason; |
738 | spin_unlock_bh(&sta->lock); |
739 | mesh_plink_frame_tx(sdata, PLINK_CLOSE, sta->sta.addr, |
740 | llid, plid, reason); |
741 | break; |
742 | default: |
743 | spin_unlock_bh(&sta->lock); |
744 | } |
745 | break; |
746 | default: |
747 | /* should not get here, PLINK_BLOCKED is dealt with at the |
748 | * beginning of the function |
749 | */ |
750 | spin_unlock_bh(&sta->lock); |
751 | break; |
752 | } |
753 | |
754 | rcu_read_unlock(); |
755 | } |
756 |
Branches:
ben-wpan
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javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9