Commit | Line | Data |
---|---|---|
c3896d2c | 1 | /* |
264d9b7d | 2 | * Copyright (c) 2008, 2009 open80211s Ltd. |
c3896d2c LCC |
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 | */ | |
5a0e3ad6 | 9 | #include <linux/gfp.h> |
902acc78 JB |
10 | #include <linux/kernel.h> |
11 | #include <linux/random.h> | |
c3896d2c | 12 | #include "ieee80211_i.h" |
2c8dccc7 | 13 | #include "rate.h" |
c3896d2c | 14 | #include "mesh.h" |
c3896d2c LCC |
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 | ||
8db09850 TP |
22 | #define PLINK_GET_LLID(p) (p + 2) |
23 | #define PLINK_GET_PLID(p) (p + 4) | |
c3896d2c LCC |
24 | |
25 | #define mod_plink_timer(s, t) (mod_timer(&s->plink_timer, \ | |
26 | jiffies + HZ * t / 1000)) | |
27 | ||
472dbc45 JB |
28 | #define dot11MeshMaxRetries(s) (s->u.mesh.mshcfg.dot11MeshMaxRetries) |
29 | #define dot11MeshRetryTimeout(s) (s->u.mesh.mshcfg.dot11MeshRetryTimeout) | |
30 | #define dot11MeshConfirmTimeout(s) (s->u.mesh.mshcfg.dot11MeshConfirmTimeout) | |
31 | #define dot11MeshHoldingTimeout(s) (s->u.mesh.mshcfg.dot11MeshHoldingTimeout) | |
32 | #define dot11MeshMaxPeerLinks(s) (s->u.mesh.mshcfg.dot11MeshMaxPeerLinks) | |
c3896d2c | 33 | |
3d4f9699 AN |
34 | /* We only need a valid sta if user configured a minimum rssi_threshold. */ |
35 | #define rssi_threshold_check(sta, sdata) \ | |
55335137 | 36 | (sdata->u.mesh.mshcfg.rssi_threshold == 0 ||\ |
3d4f9699 AN |
37 | (sta && (s8) -ewma_read(&sta->avg_signal) > \ |
38 | sdata->u.mesh.mshcfg.rssi_threshold)) | |
55335137 | 39 | |
c3896d2c LCC |
40 | enum plink_event { |
41 | PLINK_UNDEFINED, | |
42 | OPN_ACPT, | |
43 | OPN_RJCT, | |
44 | OPN_IGNR, | |
45 | CNF_ACPT, | |
46 | CNF_RJCT, | |
47 | CNF_IGNR, | |
48 | CLS_ACPT, | |
49 | CLS_IGNR | |
50 | }; | |
51 | ||
ba4a14e1 TP |
52 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
53 | enum ieee80211_self_protected_actioncode action, | |
54 | u8 *da, __le16 llid, __le16 plid, __le16 reason); | |
55 | ||
c3896d2c LCC |
56 | static inline |
57 | void mesh_plink_inc_estab_count(struct ieee80211_sub_if_data *sdata) | |
58 | { | |
472dbc45 | 59 | atomic_inc(&sdata->u.mesh.mshstats.estab_plinks); |
d0709a65 | 60 | mesh_accept_plinks_update(sdata); |
c3896d2c LCC |
61 | } |
62 | ||
63 | static inline | |
64 | void mesh_plink_dec_estab_count(struct ieee80211_sub_if_data *sdata) | |
65 | { | |
472dbc45 | 66 | atomic_dec(&sdata->u.mesh.mshstats.estab_plinks); |
d0709a65 | 67 | mesh_accept_plinks_update(sdata); |
c3896d2c LCC |
68 | } |
69 | ||
70 | /** | |
71 | * mesh_plink_fsm_restart - restart a mesh peer link finite state machine | |
72 | * | |
23c7a29c | 73 | * @sta: mesh peer link to restart |
c3896d2c | 74 | * |
07346f81 | 75 | * Locking: this function must be called holding sta->lock |
c3896d2c LCC |
76 | */ |
77 | static inline void mesh_plink_fsm_restart(struct sta_info *sta) | |
78 | { | |
57cf8043 | 79 | sta->plink_state = NL80211_PLINK_LISTEN; |
37659ff8 LCC |
80 | sta->llid = sta->plid = sta->reason = 0; |
81 | sta->plink_retries = 0; | |
c3896d2c LCC |
82 | } |
83 | ||
93e5deb1 | 84 | /* |
54ab1ffb | 85 | * Allocate mesh sta entry and insert into station table |
93e5deb1 | 86 | */ |
03e4497e | 87 | static struct sta_info *mesh_plink_alloc(struct ieee80211_sub_if_data *sdata, |
54ab1ffb | 88 | u8 *hw_addr) |
c3896d2c | 89 | { |
c3896d2c LCC |
90 | struct sta_info *sta; |
91 | ||
54ab1ffb | 92 | if (sdata->local->num_sta >= MESH_MAX_PLINKS) |
73651ee6 | 93 | return NULL; |
c3896d2c | 94 | |
34e89507 | 95 | sta = sta_info_alloc(sdata, hw_addr, GFP_KERNEL); |
73651ee6 JB |
96 | if (!sta) |
97 | return NULL; | |
c3896d2c | 98 | |
83d5cc01 JB |
99 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTH); |
100 | sta_info_pre_move_state(sta, IEEE80211_STA_ASSOC); | |
101 | sta_info_pre_move_state(sta, IEEE80211_STA_AUTHORIZED); | |
d9a7ddb0 | 102 | |
c2c98fde | 103 | set_sta_flag(sta, WLAN_STA_WME); |
d9a7ddb0 | 104 | |
c3896d2c LCC |
105 | return sta; |
106 | } | |
107 | ||
108 | /** | |
c9370197 | 109 | * __mesh_plink_deactivate - deactivate mesh peer link |
c3896d2c LCC |
110 | * |
111 | * @sta: mesh peer link to deactivate | |
112 | * | |
113 | * All mesh paths with this peer as next hop will be flushed | |
114 | * | |
07346f81 | 115 | * Locking: the caller must hold sta->lock |
c3896d2c | 116 | */ |
c9370197 | 117 | static bool __mesh_plink_deactivate(struct sta_info *sta) |
c3896d2c | 118 | { |
d0709a65 | 119 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
c9370197 | 120 | bool deactivated = false; |
d0709a65 | 121 | |
57cf8043 | 122 | if (sta->plink_state == NL80211_PLINK_ESTAB) { |
c3896d2c | 123 | mesh_plink_dec_estab_count(sdata); |
c9370197 JL |
124 | deactivated = true; |
125 | } | |
57cf8043 | 126 | sta->plink_state = NL80211_PLINK_BLOCKED; |
c3896d2c | 127 | mesh_path_flush_by_nexthop(sta); |
c9370197 JL |
128 | |
129 | return deactivated; | |
c3896d2c LCC |
130 | } |
131 | ||
902acc78 | 132 | /** |
c9370197 | 133 | * mesh_plink_deactivate - deactivate mesh peer link |
902acc78 JB |
134 | * |
135 | * @sta: mesh peer link to deactivate | |
136 | * | |
137 | * All mesh paths with this peer as next hop will be flushed | |
138 | */ | |
139 | void mesh_plink_deactivate(struct sta_info *sta) | |
140 | { | |
c9370197 JL |
141 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
142 | bool deactivated; | |
143 | ||
07346f81 | 144 | spin_lock_bh(&sta->lock); |
c9370197 | 145 | deactivated = __mesh_plink_deactivate(sta); |
ba4a14e1 TP |
146 | sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED); |
147 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, | |
148 | sta->sta.addr, sta->llid, sta->plid, | |
149 | sta->reason); | |
07346f81 | 150 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
151 | |
152 | if (deactivated) | |
153 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
902acc78 JB |
154 | } |
155 | ||
f698d856 | 156 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
54ef656b TP |
157 | enum ieee80211_self_protected_actioncode action, |
158 | u8 *da, __le16 llid, __le16 plid, __le16 reason) { | |
f698d856 | 159 | struct ieee80211_local *local = sdata->local; |
3b69a9c5 | 160 | struct sk_buff *skb; |
c3896d2c LCC |
161 | struct ieee80211_mgmt *mgmt; |
162 | bool include_plid = false; | |
8db09850 | 163 | u16 peering_proto = 0; |
3b69a9c5 TP |
164 | u8 *pos, ie_len = 4; |
165 | int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) + | |
166 | sizeof(mgmt->u.action.u.self_prot); | |
167 | ||
65e8b0cc | 168 | skb = dev_alloc_skb(local->tx_headroom + |
3b69a9c5 TP |
169 | hdr_len + |
170 | 2 + /* capability info */ | |
171 | 2 + /* AID */ | |
172 | 2 + 8 + /* supported rates */ | |
173 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
174 | 2 + sdata->u.mesh.mesh_id_len + | |
175 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
176f3608 | 176 | 2 + sizeof(struct ieee80211_ht_cap) + |
074d46d1 | 177 | 2 + sizeof(struct ieee80211_ht_operation) + |
3b69a9c5 TP |
178 | 2 + 8 + /* peering IE */ |
179 | sdata->u.mesh.ie_len); | |
c3896d2c LCC |
180 | if (!skb) |
181 | return -1; | |
65e8b0cc | 182 | skb_reserve(skb, local->tx_headroom); |
3b69a9c5 TP |
183 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); |
184 | memset(mgmt, 0, hdr_len); | |
e7827a70 HH |
185 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
186 | IEEE80211_STYPE_ACTION); | |
c3896d2c | 187 | memcpy(mgmt->da, da, ETH_ALEN); |
47846c9b | 188 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
915b5c50 | 189 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
8db09850 TP |
190 | mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED; |
191 | mgmt->u.action.u.self_prot.action_code = action; | |
c3896d2c | 192 | |
8db09850 TP |
193 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { |
194 | /* capability info */ | |
195 | pos = skb_put(skb, 2); | |
196 | memset(pos, 0, 2); | |
54ef656b | 197 | if (action == WLAN_SP_MESH_PEERING_CONFIRM) { |
8db09850 TP |
198 | /* AID */ |
199 | pos = skb_put(skb, 2); | |
77fa76bb | 200 | memcpy(pos + 2, &plid, 2); |
c3896d2c | 201 | } |
657c3e0c AN |
202 | if (ieee80211_add_srates_ie(&sdata->vif, skb, true) || |
203 | ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) || | |
082ebb0c TP |
204 | mesh_add_rsn_ie(skb, sdata) || |
205 | mesh_add_meshid_ie(skb, sdata) || | |
206 | mesh_add_meshconf_ie(skb, sdata)) | |
207 | return -1; | |
8db09850 TP |
208 | } else { /* WLAN_SP_MESH_PEERING_CLOSE */ |
209 | if (mesh_add_meshid_ie(skb, sdata)) | |
210 | return -1; | |
c3896d2c LCC |
211 | } |
212 | ||
8db09850 | 213 | /* Add Mesh Peering Management element */ |
c3896d2c | 214 | switch (action) { |
54ef656b | 215 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c | 216 | break; |
54ef656b | 217 | case WLAN_SP_MESH_PEERING_CONFIRM: |
8db09850 | 218 | ie_len += 2; |
c3896d2c LCC |
219 | include_plid = true; |
220 | break; | |
54ef656b | 221 | case WLAN_SP_MESH_PEERING_CLOSE: |
8db09850 TP |
222 | if (plid) { |
223 | ie_len += 2; | |
c3896d2c LCC |
224 | include_plid = true; |
225 | } | |
8db09850 | 226 | ie_len += 2; /* reason code */ |
c3896d2c | 227 | break; |
8db09850 TP |
228 | default: |
229 | return -EINVAL; | |
c3896d2c LCC |
230 | } |
231 | ||
8db09850 TP |
232 | if (WARN_ON(skb_tailroom(skb) < 2 + ie_len)) |
233 | return -ENOMEM; | |
234 | ||
c3896d2c | 235 | pos = skb_put(skb, 2 + ie_len); |
8db09850 | 236 | *pos++ = WLAN_EID_PEER_MGMT; |
c3896d2c | 237 | *pos++ = ie_len; |
8db09850 TP |
238 | memcpy(pos, &peering_proto, 2); |
239 | pos += 2; | |
c3896d2c | 240 | memcpy(pos, &llid, 2); |
8db09850 | 241 | pos += 2; |
c3896d2c | 242 | if (include_plid) { |
c3896d2c | 243 | memcpy(pos, &plid, 2); |
8db09850 | 244 | pos += 2; |
c3896d2c | 245 | } |
54ef656b | 246 | if (action == WLAN_SP_MESH_PEERING_CLOSE) { |
c3896d2c | 247 | memcpy(pos, &reason, 2); |
8db09850 | 248 | pos += 2; |
c3896d2c | 249 | } |
176f3608 TP |
250 | |
251 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { | |
252 | if (mesh_add_ht_cap_ie(skb, sdata) || | |
074d46d1 | 253 | mesh_add_ht_oper_ie(skb, sdata)) |
176f3608 TP |
254 | return -1; |
255 | } | |
256 | ||
8db09850 TP |
257 | if (mesh_add_vendor_ies(skb, sdata)) |
258 | return -1; | |
c3896d2c | 259 | |
62ae67be | 260 | ieee80211_tx_skb(sdata, skb); |
c3896d2c LCC |
261 | return 0; |
262 | } | |
263 | ||
54ab1ffb TP |
264 | /* mesh_peer_init - initialize new mesh peer and return resulting sta_info |
265 | * | |
266 | * @sdata: local meshif | |
267 | * @addr: peer's address | |
54ab1ffb TP |
268 | * @elems: IEs from beacon or mesh peering frame |
269 | * | |
270 | * call under RCU | |
271 | */ | |
272 | static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata, | |
f743ff49 | 273 | u8 *addr, |
54ab1ffb | 274 | struct ieee802_11_elems *elems) |
c3896d2c | 275 | { |
f698d856 | 276 | struct ieee80211_local *local = sdata->local; |
f743ff49 | 277 | enum ieee80211_band band = local->oper_channel->band; |
54ab1ffb | 278 | struct ieee80211_supported_band *sband; |
f743ff49 | 279 | u32 rates, basic_rates = 0; |
c3896d2c | 280 | struct sta_info *sta; |
e87278e7 | 281 | bool insert = false; |
c3896d2c | 282 | |
f743ff49 TP |
283 | sband = local->hw.wiphy->bands[band]; |
284 | rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates); | |
d0709a65 | 285 | |
54ab1ffb | 286 | sta = sta_info_get(sdata, addr); |
c3896d2c | 287 | if (!sta) { |
54ab1ffb | 288 | sta = mesh_plink_alloc(sdata, addr); |
34e89507 | 289 | if (!sta) |
54ab1ffb | 290 | return NULL; |
e87278e7 | 291 | insert = true; |
c3896d2c LCC |
292 | } |
293 | ||
54ab1ffb | 294 | spin_lock_bh(&sta->lock); |
c3896d2c | 295 | sta->last_rx = jiffies; |
f743ff49 | 296 | sta->sta.supp_rates[band] = rates; |
e76781e4 TP |
297 | if (elems->ht_cap_elem && |
298 | sdata->local->_oper_channel_type != NL80211_CHAN_NO_HT) | |
54ab1ffb TP |
299 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
300 | elems->ht_cap_elem, | |
301 | &sta->sta.ht_cap); | |
302 | else | |
303 | memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap)); | |
304 | ||
305 | rate_control_rate_init(sta); | |
306 | spin_unlock_bh(&sta->lock); | |
307 | ||
e87278e7 TP |
308 | if (insert && sta_info_insert(sta)) |
309 | return NULL; | |
310 | ||
54ab1ffb TP |
311 | return sta; |
312 | } | |
313 | ||
f743ff49 TP |
314 | void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata, |
315 | u8 *hw_addr, | |
54ab1ffb TP |
316 | struct ieee802_11_elems *elems) |
317 | { | |
318 | struct sta_info *sta; | |
319 | ||
320 | /* Userspace handles peer allocation when security is enabled */ | |
321 | if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) { | |
322 | cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr, | |
323 | elems->ie_start, | |
324 | elems->total_len, | |
325 | GFP_KERNEL); | |
326 | return; | |
327 | } | |
328 | ||
329 | rcu_read_lock(); | |
f743ff49 | 330 | sta = mesh_peer_init(sdata, hw_addr, elems); |
54ab1ffb TP |
331 | if (!sta) |
332 | goto out; | |
333 | ||
1570ca59 | 334 | if (mesh_peer_accepts_plinks(elems) && |
54ab1ffb TP |
335 | sta->plink_state == NL80211_PLINK_LISTEN && |
336 | sdata->u.mesh.accepting_plinks && | |
337 | sdata->u.mesh.mshcfg.auto_open_plinks && | |
338 | rssi_threshold_check(sta, sdata)) | |
c3896d2c LCC |
339 | mesh_plink_open(sta); |
340 | ||
54ab1ffb | 341 | out: |
d0709a65 | 342 | rcu_read_unlock(); |
c3896d2c LCC |
343 | } |
344 | ||
345 | static void mesh_plink_timer(unsigned long data) | |
346 | { | |
347 | struct sta_info *sta; | |
348 | __le16 llid, plid, reason; | |
c3896d2c | 349 | struct ieee80211_sub_if_data *sdata; |
c3896d2c | 350 | |
d0709a65 JB |
351 | /* |
352 | * This STA is valid because sta_info_destroy() will | |
353 | * del_timer_sync() this timer after having made sure | |
354 | * it cannot be readded (by deleting the plink.) | |
355 | */ | |
c3896d2c LCC |
356 | sta = (struct sta_info *) data; |
357 | ||
5bb644a0 JB |
358 | if (sta->sdata->local->quiescing) { |
359 | sta->plink_timer_was_running = true; | |
360 | return; | |
361 | } | |
362 | ||
07346f81 | 363 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
364 | if (sta->ignore_plink_timer) { |
365 | sta->ignore_plink_timer = false; | |
07346f81 | 366 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
367 | return; |
368 | } | |
0c68ae26 JB |
369 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
370 | sta->sta.addr, sta->plink_state); | |
c3896d2c LCC |
371 | reason = 0; |
372 | llid = sta->llid; | |
373 | plid = sta->plid; | |
d0709a65 | 374 | sdata = sta->sdata; |
c3896d2c LCC |
375 | |
376 | switch (sta->plink_state) { | |
57cf8043 JC |
377 | case NL80211_PLINK_OPN_RCVD: |
378 | case NL80211_PLINK_OPN_SNT: | |
c3896d2c LCC |
379 | /* retry timer */ |
380 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { | |
381 | u32 rand; | |
0c68ae26 JB |
382 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
383 | sta->sta.addr, sta->plink_retries, | |
384 | sta->plink_timeout); | |
c3896d2c LCC |
385 | get_random_bytes(&rand, sizeof(u32)); |
386 | sta->plink_timeout = sta->plink_timeout + | |
387 | rand % sta->plink_timeout; | |
388 | ++sta->plink_retries; | |
d0709a65 | 389 | mod_plink_timer(sta, sta->plink_timeout); |
07346f81 | 390 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
391 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
392 | sta->sta.addr, llid, 0, 0); | |
c3896d2c LCC |
393 | break; |
394 | } | |
54ef656b | 395 | reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES); |
c3896d2c | 396 | /* fall through on else */ |
57cf8043 | 397 | case NL80211_PLINK_CNF_RCVD: |
c3896d2c LCC |
398 | /* confirm timer */ |
399 | if (!reason) | |
54ef656b | 400 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT); |
57cf8043 | 401 | sta->plink_state = NL80211_PLINK_HOLDING; |
d0709a65 | 402 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
07346f81 | 403 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
404 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
405 | sta->sta.addr, llid, plid, reason); | |
c3896d2c | 406 | break; |
57cf8043 | 407 | case NL80211_PLINK_HOLDING: |
c3896d2c | 408 | /* holding timer */ |
d0709a65 | 409 | del_timer(&sta->plink_timer); |
c3896d2c | 410 | mesh_plink_fsm_restart(sta); |
07346f81 | 411 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
412 | break; |
413 | default: | |
07346f81 | 414 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
415 | break; |
416 | } | |
c3896d2c LCC |
417 | } |
418 | ||
5bb644a0 JB |
419 | #ifdef CONFIG_PM |
420 | void mesh_plink_quiesce(struct sta_info *sta) | |
421 | { | |
422 | if (del_timer_sync(&sta->plink_timer)) | |
423 | sta->plink_timer_was_running = true; | |
424 | } | |
425 | ||
426 | void mesh_plink_restart(struct sta_info *sta) | |
427 | { | |
428 | if (sta->plink_timer_was_running) { | |
429 | add_timer(&sta->plink_timer); | |
430 | sta->plink_timer_was_running = false; | |
431 | } | |
432 | } | |
433 | #endif | |
434 | ||
c3896d2c LCC |
435 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
436 | { | |
437 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); | |
438 | sta->plink_timer.data = (unsigned long) sta; | |
439 | sta->plink_timer.function = mesh_plink_timer; | |
440 | sta->plink_timeout = timeout; | |
c3896d2c LCC |
441 | add_timer(&sta->plink_timer); |
442 | } | |
443 | ||
444 | int mesh_plink_open(struct sta_info *sta) | |
445 | { | |
446 | __le16 llid; | |
d0709a65 | 447 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
c3896d2c | 448 | |
c2c98fde | 449 | if (!test_sta_flag(sta, WLAN_STA_AUTH)) |
53e80511 JC |
450 | return -EPERM; |
451 | ||
07346f81 | 452 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
453 | get_random_bytes(&llid, 2); |
454 | sta->llid = llid; | |
57cf8043 | 455 | if (sta->plink_state != NL80211_PLINK_LISTEN) { |
07346f81 | 456 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
457 | return -EBUSY; |
458 | } | |
57cf8043 | 459 | sta->plink_state = NL80211_PLINK_OPN_SNT; |
c3896d2c | 460 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
07346f81 | 461 | spin_unlock_bh(&sta->lock); |
0c68ae26 JB |
462 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
463 | sta->sta.addr); | |
c3896d2c | 464 | |
54ef656b | 465 | return mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
17741cdc | 466 | sta->sta.addr, llid, 0, 0); |
c3896d2c LCC |
467 | } |
468 | ||
469 | void mesh_plink_block(struct sta_info *sta) | |
470 | { | |
c9370197 JL |
471 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
472 | bool deactivated; | |
473 | ||
07346f81 | 474 | spin_lock_bh(&sta->lock); |
c9370197 | 475 | deactivated = __mesh_plink_deactivate(sta); |
57cf8043 | 476 | sta->plink_state = NL80211_PLINK_BLOCKED; |
07346f81 | 477 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
478 | |
479 | if (deactivated) | |
480 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
c3896d2c LCC |
481 | } |
482 | ||
c3896d2c | 483 | |
f698d856 | 484 | void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, |
c3896d2c LCC |
485 | size_t len, struct ieee80211_rx_status *rx_status) |
486 | { | |
c3896d2c LCC |
487 | struct ieee802_11_elems elems; |
488 | struct sta_info *sta; | |
489 | enum plink_event event; | |
54ef656b | 490 | enum ieee80211_self_protected_actioncode ftype; |
c3896d2c | 491 | size_t baselen; |
d12c7452 | 492 | bool deactivated, matches_local = true; |
c3896d2c LCC |
493 | u8 ie_len; |
494 | u8 *baseaddr; | |
495 | __le16 plid, llid, reason; | |
1460dd15 RP |
496 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
497 | static const char *mplstates[] = { | |
57cf8043 JC |
498 | [NL80211_PLINK_LISTEN] = "LISTEN", |
499 | [NL80211_PLINK_OPN_SNT] = "OPN-SNT", | |
500 | [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD", | |
501 | [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD", | |
502 | [NL80211_PLINK_ESTAB] = "ESTAB", | |
503 | [NL80211_PLINK_HOLDING] = "HOLDING", | |
504 | [NL80211_PLINK_BLOCKED] = "BLOCKED" | |
1460dd15 RP |
505 | }; |
506 | #endif | |
c3896d2c | 507 | |
9c80d3dc JB |
508 | /* need action_code, aux */ |
509 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) | |
510 | return; | |
511 | ||
c3896d2c LCC |
512 | if (is_multicast_ether_addr(mgmt->da)) { |
513 | mpl_dbg("Mesh plink: ignore frame from multicast address"); | |
514 | return; | |
515 | } | |
516 | ||
8db09850 TP |
517 | baseaddr = mgmt->u.action.u.self_prot.variable; |
518 | baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; | |
519 | if (mgmt->u.action.u.self_prot.action_code == | |
54ef656b | 520 | WLAN_SP_MESH_PEERING_CONFIRM) { |
c3896d2c | 521 | baseaddr += 4; |
70bdb6b2 | 522 | baselen += 4; |
c3896d2c LCC |
523 | } |
524 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); | |
8db09850 | 525 | if (!elems.peering) { |
c3896d2c LCC |
526 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
527 | return; | |
528 | } | |
b130e5ce JC |
529 | if (elems.rsn_len && |
530 | sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { | |
5cff5e01 JC |
531 | mpl_dbg("Mesh plink: can't establish link with secure peer\n"); |
532 | return; | |
533 | } | |
c3896d2c | 534 | |
8db09850 TP |
535 | ftype = mgmt->u.action.u.self_prot.action_code; |
536 | ie_len = elems.peering_len; | |
537 | if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || | |
538 | (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || | |
539 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 | |
540 | && ie_len != 8)) { | |
0938393f RP |
541 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
542 | ftype, ie_len); | |
c3896d2c LCC |
543 | return; |
544 | } | |
545 | ||
54ef656b TP |
546 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
547 | (!elems.mesh_id || !elems.mesh_config)) { | |
c3896d2c LCC |
548 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
549 | return; | |
550 | } | |
551 | /* Note the lines below are correct, the llid in the frame is the plid | |
552 | * from the point of view of this host. | |
553 | */ | |
8db09850 | 554 | memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); |
54ef656b | 555 | if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || |
8db09850 TP |
556 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) |
557 | memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); | |
c3896d2c | 558 | |
d0709a65 JB |
559 | rcu_read_lock(); |
560 | ||
abe60632 | 561 | sta = sta_info_get(sdata, mgmt->sa); |
54ef656b | 562 | if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { |
c3896d2c | 563 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
d0709a65 | 564 | rcu_read_unlock(); |
c3896d2c LCC |
565 | return; |
566 | } | |
567 | ||
55335137 | 568 | if (ftype == WLAN_SP_MESH_PEERING_OPEN && |
3d4f9699 | 569 | !rssi_threshold_check(sta, sdata)) { |
55335137 | 570 | mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n", |
3d4f9699 | 571 | mgmt->sa); |
55335137 AN |
572 | rcu_read_unlock(); |
573 | return; | |
574 | } | |
575 | ||
c2c98fde | 576 | if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) { |
53e80511 JC |
577 | mpl_dbg("Mesh plink: Action frame from non-authed peer\n"); |
578 | rcu_read_unlock(); | |
579 | return; | |
580 | } | |
581 | ||
57cf8043 | 582 | if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) { |
d0709a65 | 583 | rcu_read_unlock(); |
c3896d2c LCC |
584 | return; |
585 | } | |
586 | ||
587 | /* Now we will figure out the appropriate event... */ | |
588 | event = PLINK_UNDEFINED; | |
54ef656b | 589 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
f743ff49 | 590 | !mesh_matches_local(sdata, &elems)) { |
d12c7452 | 591 | matches_local = false; |
c3896d2c | 592 | switch (ftype) { |
54ef656b | 593 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c LCC |
594 | event = OPN_RJCT; |
595 | break; | |
54ef656b | 596 | case WLAN_SP_MESH_PEERING_CONFIRM: |
c3896d2c LCC |
597 | event = CNF_RJCT; |
598 | break; | |
54ef656b | 599 | default: |
c3896d2c LCC |
600 | break; |
601 | } | |
d12c7452 CL |
602 | } |
603 | ||
604 | if (!sta && !matches_local) { | |
605 | rcu_read_unlock(); | |
54ef656b | 606 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
d12c7452 | 607 | llid = 0; |
54ef656b TP |
608 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
609 | mgmt->sa, llid, plid, reason); | |
d12c7452 | 610 | return; |
c3896d2c | 611 | } else if (!sta) { |
54ef656b | 612 | /* ftype == WLAN_SP_MESH_PEERING_OPEN */ |
c3896d2c LCC |
613 | if (!mesh_plink_free_count(sdata)) { |
614 | mpl_dbg("Mesh plink error: no more free plinks\n"); | |
73651ee6 JB |
615 | rcu_read_unlock(); |
616 | return; | |
617 | } | |
c3896d2c | 618 | event = OPN_ACPT; |
d12c7452 | 619 | } else if (matches_local) { |
c3896d2c | 620 | switch (ftype) { |
54ef656b | 621 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c | 622 | if (!mesh_plink_free_count(sdata) || |
d0709a65 | 623 | (sta->plid && sta->plid != plid)) |
c3896d2c LCC |
624 | event = OPN_IGNR; |
625 | else | |
626 | event = OPN_ACPT; | |
627 | break; | |
54ef656b | 628 | case WLAN_SP_MESH_PEERING_CONFIRM: |
c3896d2c | 629 | if (!mesh_plink_free_count(sdata) || |
d0709a65 | 630 | (sta->llid != llid || sta->plid != plid)) |
c3896d2c LCC |
631 | event = CNF_IGNR; |
632 | else | |
633 | event = CNF_ACPT; | |
634 | break; | |
54ef656b | 635 | case WLAN_SP_MESH_PEERING_CLOSE: |
57cf8043 | 636 | if (sta->plink_state == NL80211_PLINK_ESTAB) |
c3896d2c LCC |
637 | /* Do not check for llid or plid. This does not |
638 | * follow the standard but since multiple plinks | |
639 | * per sta are not supported, it is necessary in | |
640 | * order to avoid a livelock when MP A sees an | |
641 | * establish peer link to MP B but MP B does not | |
642 | * see it. This can be caused by a timeout in | |
643 | * B's peer link establishment or B beign | |
644 | * restarted. | |
645 | */ | |
646 | event = CLS_ACPT; | |
647 | else if (sta->plid != plid) | |
648 | event = CLS_IGNR; | |
649 | else if (ie_len == 7 && sta->llid != llid) | |
650 | event = CLS_IGNR; | |
651 | else | |
652 | event = CLS_ACPT; | |
653 | break; | |
654 | default: | |
655 | mpl_dbg("Mesh plink: unknown frame subtype\n"); | |
d0709a65 | 656 | rcu_read_unlock(); |
c3896d2c LCC |
657 | return; |
658 | } | |
54ab1ffb TP |
659 | } |
660 | ||
661 | if (event == OPN_ACPT) { | |
662 | /* allocate sta entry if necessary and update info */ | |
f743ff49 | 663 | sta = mesh_peer_init(sdata, mgmt->sa, &elems); |
54ab1ffb TP |
664 | if (!sta) { |
665 | mpl_dbg("Mesh plink: failed to init peer!\n"); | |
666 | rcu_read_unlock(); | |
667 | return; | |
668 | } | |
c3896d2c LCC |
669 | } |
670 | ||
1460dd15 RP |
671 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
672 | mgmt->sa, mplstates[sta->plink_state], | |
0c68ae26 JB |
673 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
674 | event); | |
c3896d2c | 675 | reason = 0; |
54ab1ffb | 676 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
677 | switch (sta->plink_state) { |
678 | /* spin_unlock as soon as state is updated at each case */ | |
57cf8043 | 679 | case NL80211_PLINK_LISTEN: |
c3896d2c LCC |
680 | switch (event) { |
681 | case CLS_ACPT: | |
682 | mesh_plink_fsm_restart(sta); | |
07346f81 | 683 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
684 | break; |
685 | case OPN_ACPT: | |
57cf8043 | 686 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
c3896d2c LCC |
687 | sta->plid = plid; |
688 | get_random_bytes(&llid, 2); | |
689 | sta->llid = llid; | |
690 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); | |
07346f81 | 691 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
692 | mesh_plink_frame_tx(sdata, |
693 | WLAN_SP_MESH_PEERING_OPEN, | |
694 | sta->sta.addr, llid, 0, 0); | |
695 | mesh_plink_frame_tx(sdata, | |
696 | WLAN_SP_MESH_PEERING_CONFIRM, | |
697 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
698 | break; |
699 | default: | |
07346f81 | 700 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
701 | break; |
702 | } | |
703 | break; | |
704 | ||
57cf8043 | 705 | case NL80211_PLINK_OPN_SNT: |
c3896d2c LCC |
706 | switch (event) { |
707 | case OPN_RJCT: | |
708 | case CNF_RJCT: | |
54ef656b | 709 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
710 | case CLS_ACPT: |
711 | if (!reason) | |
54ef656b | 712 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 713 | sta->reason = reason; |
57cf8043 | 714 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
715 | if (!mod_plink_timer(sta, |
716 | dot11MeshHoldingTimeout(sdata))) | |
717 | sta->ignore_plink_timer = true; | |
718 | ||
719 | llid = sta->llid; | |
07346f81 | 720 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
721 | mesh_plink_frame_tx(sdata, |
722 | WLAN_SP_MESH_PEERING_CLOSE, | |
723 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
724 | break; |
725 | case OPN_ACPT: | |
726 | /* retry timer is left untouched */ | |
57cf8043 | 727 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
c3896d2c LCC |
728 | sta->plid = plid; |
729 | llid = sta->llid; | |
07346f81 | 730 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
731 | mesh_plink_frame_tx(sdata, |
732 | WLAN_SP_MESH_PEERING_CONFIRM, | |
733 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
734 | break; |
735 | case CNF_ACPT: | |
57cf8043 | 736 | sta->plink_state = NL80211_PLINK_CNF_RCVD; |
c3896d2c LCC |
737 | if (!mod_plink_timer(sta, |
738 | dot11MeshConfirmTimeout(sdata))) | |
739 | sta->ignore_plink_timer = true; | |
740 | ||
07346f81 | 741 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
742 | break; |
743 | default: | |
07346f81 | 744 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
745 | break; |
746 | } | |
747 | break; | |
748 | ||
57cf8043 | 749 | case NL80211_PLINK_OPN_RCVD: |
c3896d2c LCC |
750 | switch (event) { |
751 | case OPN_RJCT: | |
752 | case CNF_RJCT: | |
54ef656b | 753 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
754 | case CLS_ACPT: |
755 | if (!reason) | |
54ef656b | 756 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 757 | sta->reason = reason; |
57cf8043 | 758 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
759 | if (!mod_plink_timer(sta, |
760 | dot11MeshHoldingTimeout(sdata))) | |
761 | sta->ignore_plink_timer = true; | |
762 | ||
763 | llid = sta->llid; | |
07346f81 | 764 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
765 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
766 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
767 | break; |
768 | case OPN_ACPT: | |
769 | llid = sta->llid; | |
07346f81 | 770 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
771 | mesh_plink_frame_tx(sdata, |
772 | WLAN_SP_MESH_PEERING_CONFIRM, | |
773 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
774 | break; |
775 | case CNF_ACPT: | |
d0709a65 | 776 | del_timer(&sta->plink_timer); |
57cf8043 | 777 | sta->plink_state = NL80211_PLINK_ESTAB; |
07346f81 | 778 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
779 | mesh_plink_inc_estab_count(sdata); |
780 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
0c68ae26 JB |
781 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
782 | sta->sta.addr); | |
c3896d2c LCC |
783 | break; |
784 | default: | |
07346f81 | 785 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
786 | break; |
787 | } | |
788 | break; | |
789 | ||
57cf8043 | 790 | case NL80211_PLINK_CNF_RCVD: |
c3896d2c LCC |
791 | switch (event) { |
792 | case OPN_RJCT: | |
793 | case CNF_RJCT: | |
54ef656b | 794 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
795 | case CLS_ACPT: |
796 | if (!reason) | |
54ef656b | 797 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 798 | sta->reason = reason; |
57cf8043 | 799 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
800 | if (!mod_plink_timer(sta, |
801 | dot11MeshHoldingTimeout(sdata))) | |
802 | sta->ignore_plink_timer = true; | |
803 | ||
804 | llid = sta->llid; | |
07346f81 | 805 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
806 | mesh_plink_frame_tx(sdata, |
807 | WLAN_SP_MESH_PEERING_CLOSE, | |
808 | sta->sta.addr, llid, plid, reason); | |
ff59dc76 | 809 | break; |
c3896d2c | 810 | case OPN_ACPT: |
d0709a65 | 811 | del_timer(&sta->plink_timer); |
57cf8043 | 812 | sta->plink_state = NL80211_PLINK_ESTAB; |
07346f81 | 813 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
814 | mesh_plink_inc_estab_count(sdata); |
815 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
0c68ae26 JB |
816 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
817 | sta->sta.addr); | |
54ef656b TP |
818 | mesh_plink_frame_tx(sdata, |
819 | WLAN_SP_MESH_PEERING_CONFIRM, | |
820 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
821 | break; |
822 | default: | |
07346f81 | 823 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
824 | break; |
825 | } | |
826 | break; | |
827 | ||
57cf8043 | 828 | case NL80211_PLINK_ESTAB: |
c3896d2c LCC |
829 | switch (event) { |
830 | case CLS_ACPT: | |
54ef656b | 831 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 832 | sta->reason = reason; |
c9370197 | 833 | deactivated = __mesh_plink_deactivate(sta); |
57cf8043 | 834 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c | 835 | llid = sta->llid; |
d0709a65 | 836 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
07346f81 | 837 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
838 | if (deactivated) |
839 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
54ef656b TP |
840 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
841 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
842 | break; |
843 | case OPN_ACPT: | |
844 | llid = sta->llid; | |
07346f81 | 845 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
846 | mesh_plink_frame_tx(sdata, |
847 | WLAN_SP_MESH_PEERING_CONFIRM, | |
848 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
849 | break; |
850 | default: | |
07346f81 | 851 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
852 | break; |
853 | } | |
854 | break; | |
57cf8043 | 855 | case NL80211_PLINK_HOLDING: |
c3896d2c LCC |
856 | switch (event) { |
857 | case CLS_ACPT: | |
d0709a65 | 858 | if (del_timer(&sta->plink_timer)) |
c3896d2c | 859 | sta->ignore_plink_timer = 1; |
c3896d2c | 860 | mesh_plink_fsm_restart(sta); |
07346f81 | 861 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
862 | break; |
863 | case OPN_ACPT: | |
864 | case CNF_ACPT: | |
865 | case OPN_RJCT: | |
866 | case CNF_RJCT: | |
867 | llid = sta->llid; | |
868 | reason = sta->reason; | |
07346f81 | 869 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
870 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
871 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
872 | break; |
873 | default: | |
07346f81 | 874 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
875 | } |
876 | break; | |
877 | default: | |
b4e08ea1 | 878 | /* should not get here, PLINK_BLOCKED is dealt with at the |
3ad2f3fb | 879 | * beginning of the function |
c3896d2c | 880 | */ |
07346f81 | 881 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
882 | break; |
883 | } | |
d0709a65 JB |
884 | |
885 | rcu_read_unlock(); | |
c3896d2c | 886 | } |