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 | |
54ab1ffb TP |
105 | if (sta_info_insert(sta)) |
106 | return NULL; | |
c3896d2c LCC |
107 | |
108 | return sta; | |
109 | } | |
110 | ||
111 | /** | |
c9370197 | 112 | * __mesh_plink_deactivate - deactivate mesh peer link |
c3896d2c LCC |
113 | * |
114 | * @sta: mesh peer link to deactivate | |
115 | * | |
116 | * All mesh paths with this peer as next hop will be flushed | |
117 | * | |
07346f81 | 118 | * Locking: the caller must hold sta->lock |
c3896d2c | 119 | */ |
c9370197 | 120 | static bool __mesh_plink_deactivate(struct sta_info *sta) |
c3896d2c | 121 | { |
d0709a65 | 122 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
c9370197 | 123 | bool deactivated = false; |
d0709a65 | 124 | |
57cf8043 | 125 | if (sta->plink_state == NL80211_PLINK_ESTAB) { |
c3896d2c | 126 | mesh_plink_dec_estab_count(sdata); |
c9370197 JL |
127 | deactivated = true; |
128 | } | |
57cf8043 | 129 | sta->plink_state = NL80211_PLINK_BLOCKED; |
c3896d2c | 130 | mesh_path_flush_by_nexthop(sta); |
c9370197 JL |
131 | |
132 | return deactivated; | |
c3896d2c LCC |
133 | } |
134 | ||
902acc78 | 135 | /** |
c9370197 | 136 | * mesh_plink_deactivate - deactivate mesh peer link |
902acc78 JB |
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 | { | |
c9370197 JL |
144 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
145 | bool deactivated; | |
146 | ||
07346f81 | 147 | spin_lock_bh(&sta->lock); |
c9370197 | 148 | deactivated = __mesh_plink_deactivate(sta); |
ba4a14e1 TP |
149 | sta->reason = cpu_to_le16(WLAN_REASON_MESH_PEER_CANCELED); |
150 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, | |
151 | sta->sta.addr, sta->llid, sta->plid, | |
152 | sta->reason); | |
07346f81 | 153 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
154 | |
155 | if (deactivated) | |
156 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
902acc78 JB |
157 | } |
158 | ||
f698d856 | 159 | static int mesh_plink_frame_tx(struct ieee80211_sub_if_data *sdata, |
54ef656b TP |
160 | enum ieee80211_self_protected_actioncode action, |
161 | u8 *da, __le16 llid, __le16 plid, __le16 reason) { | |
f698d856 | 162 | struct ieee80211_local *local = sdata->local; |
3b69a9c5 | 163 | struct sk_buff *skb; |
c3896d2c LCC |
164 | struct ieee80211_mgmt *mgmt; |
165 | bool include_plid = false; | |
8db09850 | 166 | u16 peering_proto = 0; |
3b69a9c5 TP |
167 | u8 *pos, ie_len = 4; |
168 | int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.self_prot) + | |
169 | sizeof(mgmt->u.action.u.self_prot); | |
170 | ||
65e8b0cc | 171 | skb = dev_alloc_skb(local->tx_headroom + |
3b69a9c5 TP |
172 | hdr_len + |
173 | 2 + /* capability info */ | |
174 | 2 + /* AID */ | |
175 | 2 + 8 + /* supported rates */ | |
176 | 2 + (IEEE80211_MAX_SUPP_RATES - 8) + | |
177 | 2 + sdata->u.mesh.mesh_id_len + | |
178 | 2 + sizeof(struct ieee80211_meshconf_ie) + | |
176f3608 | 179 | 2 + sizeof(struct ieee80211_ht_cap) + |
074d46d1 | 180 | 2 + sizeof(struct ieee80211_ht_operation) + |
3b69a9c5 TP |
181 | 2 + 8 + /* peering IE */ |
182 | sdata->u.mesh.ie_len); | |
c3896d2c LCC |
183 | if (!skb) |
184 | return -1; | |
65e8b0cc | 185 | skb_reserve(skb, local->tx_headroom); |
3b69a9c5 TP |
186 | mgmt = (struct ieee80211_mgmt *) skb_put(skb, hdr_len); |
187 | memset(mgmt, 0, hdr_len); | |
e7827a70 HH |
188 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | |
189 | IEEE80211_STYPE_ACTION); | |
c3896d2c | 190 | memcpy(mgmt->da, da, ETH_ALEN); |
47846c9b | 191 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); |
915b5c50 | 192 | memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN); |
8db09850 TP |
193 | mgmt->u.action.category = WLAN_CATEGORY_SELF_PROTECTED; |
194 | mgmt->u.action.u.self_prot.action_code = action; | |
c3896d2c | 195 | |
8db09850 TP |
196 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { |
197 | /* capability info */ | |
198 | pos = skb_put(skb, 2); | |
199 | memset(pos, 0, 2); | |
54ef656b | 200 | if (action == WLAN_SP_MESH_PEERING_CONFIRM) { |
8db09850 TP |
201 | /* AID */ |
202 | pos = skb_put(skb, 2); | |
77fa76bb | 203 | memcpy(pos + 2, &plid, 2); |
c3896d2c | 204 | } |
657c3e0c AN |
205 | if (ieee80211_add_srates_ie(&sdata->vif, skb, true) || |
206 | ieee80211_add_ext_srates_ie(&sdata->vif, skb, true) || | |
082ebb0c TP |
207 | mesh_add_rsn_ie(skb, sdata) || |
208 | mesh_add_meshid_ie(skb, sdata) || | |
209 | mesh_add_meshconf_ie(skb, sdata)) | |
210 | return -1; | |
8db09850 TP |
211 | } else { /* WLAN_SP_MESH_PEERING_CLOSE */ |
212 | if (mesh_add_meshid_ie(skb, sdata)) | |
213 | return -1; | |
c3896d2c LCC |
214 | } |
215 | ||
8db09850 | 216 | /* Add Mesh Peering Management element */ |
c3896d2c | 217 | switch (action) { |
54ef656b | 218 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c | 219 | break; |
54ef656b | 220 | case WLAN_SP_MESH_PEERING_CONFIRM: |
8db09850 | 221 | ie_len += 2; |
c3896d2c LCC |
222 | include_plid = true; |
223 | break; | |
54ef656b | 224 | case WLAN_SP_MESH_PEERING_CLOSE: |
8db09850 TP |
225 | if (plid) { |
226 | ie_len += 2; | |
c3896d2c LCC |
227 | include_plid = true; |
228 | } | |
8db09850 | 229 | ie_len += 2; /* reason code */ |
c3896d2c | 230 | break; |
8db09850 TP |
231 | default: |
232 | return -EINVAL; | |
c3896d2c LCC |
233 | } |
234 | ||
8db09850 TP |
235 | if (WARN_ON(skb_tailroom(skb) < 2 + ie_len)) |
236 | return -ENOMEM; | |
237 | ||
c3896d2c | 238 | pos = skb_put(skb, 2 + ie_len); |
8db09850 | 239 | *pos++ = WLAN_EID_PEER_MGMT; |
c3896d2c | 240 | *pos++ = ie_len; |
8db09850 TP |
241 | memcpy(pos, &peering_proto, 2); |
242 | pos += 2; | |
c3896d2c | 243 | memcpy(pos, &llid, 2); |
8db09850 | 244 | pos += 2; |
c3896d2c | 245 | if (include_plid) { |
c3896d2c | 246 | memcpy(pos, &plid, 2); |
8db09850 | 247 | pos += 2; |
c3896d2c | 248 | } |
54ef656b | 249 | if (action == WLAN_SP_MESH_PEERING_CLOSE) { |
c3896d2c | 250 | memcpy(pos, &reason, 2); |
8db09850 | 251 | pos += 2; |
c3896d2c | 252 | } |
176f3608 TP |
253 | |
254 | if (action != WLAN_SP_MESH_PEERING_CLOSE) { | |
255 | if (mesh_add_ht_cap_ie(skb, sdata) || | |
074d46d1 | 256 | mesh_add_ht_oper_ie(skb, sdata)) |
176f3608 TP |
257 | return -1; |
258 | } | |
259 | ||
8db09850 TP |
260 | if (mesh_add_vendor_ies(skb, sdata)) |
261 | return -1; | |
c3896d2c | 262 | |
62ae67be | 263 | ieee80211_tx_skb(sdata, skb); |
c3896d2c LCC |
264 | return 0; |
265 | } | |
266 | ||
54ab1ffb TP |
267 | /* mesh_peer_init - initialize new mesh peer and return resulting sta_info |
268 | * | |
269 | * @sdata: local meshif | |
270 | * @addr: peer's address | |
271 | * @rates: station's supported rates | |
272 | * @elems: IEs from beacon or mesh peering frame | |
273 | * | |
274 | * call under RCU | |
275 | */ | |
276 | static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata, | |
277 | u8 *addr, u32 rates, | |
278 | struct ieee802_11_elems *elems) | |
c3896d2c | 279 | { |
f698d856 | 280 | struct ieee80211_local *local = sdata->local; |
54ab1ffb | 281 | struct ieee80211_supported_band *sband; |
c3896d2c LCC |
282 | struct sta_info *sta; |
283 | ||
54ab1ffb | 284 | sband = local->hw.wiphy->bands[local->oper_channel->band]; |
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; |
c3896d2c LCC |
291 | } |
292 | ||
54ab1ffb | 293 | spin_lock_bh(&sta->lock); |
c3896d2c | 294 | sta->last_rx = jiffies; |
323ce79a | 295 | sta->sta.supp_rates[local->hw.conf.channel->band] = rates; |
54ab1ffb TP |
296 | if (elems->ht_cap_elem) |
297 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, | |
298 | elems->ht_cap_elem, | |
299 | &sta->sta.ht_cap); | |
300 | else | |
301 | memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap)); | |
302 | ||
303 | rate_control_rate_init(sta); | |
304 | spin_unlock_bh(&sta->lock); | |
305 | ||
306 | return sta; | |
307 | } | |
308 | ||
309 | void mesh_neighbour_update(u8 *hw_addr, u32 rates, | |
310 | struct ieee80211_sub_if_data *sdata, | |
311 | struct ieee802_11_elems *elems) | |
312 | { | |
313 | struct sta_info *sta; | |
314 | ||
315 | /* Userspace handles peer allocation when security is enabled */ | |
316 | if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) { | |
317 | cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr, | |
318 | elems->ie_start, | |
319 | elems->total_len, | |
320 | GFP_KERNEL); | |
321 | return; | |
322 | } | |
323 | ||
324 | rcu_read_lock(); | |
325 | sta = mesh_peer_init(sdata, hw_addr, rates, elems); | |
326 | if (!sta) | |
327 | goto out; | |
328 | ||
1570ca59 | 329 | if (mesh_peer_accepts_plinks(elems) && |
54ab1ffb TP |
330 | sta->plink_state == NL80211_PLINK_LISTEN && |
331 | sdata->u.mesh.accepting_plinks && | |
332 | sdata->u.mesh.mshcfg.auto_open_plinks && | |
333 | rssi_threshold_check(sta, sdata)) | |
c3896d2c LCC |
334 | mesh_plink_open(sta); |
335 | ||
54ab1ffb | 336 | out: |
d0709a65 | 337 | rcu_read_unlock(); |
c3896d2c LCC |
338 | } |
339 | ||
340 | static void mesh_plink_timer(unsigned long data) | |
341 | { | |
342 | struct sta_info *sta; | |
343 | __le16 llid, plid, reason; | |
c3896d2c | 344 | struct ieee80211_sub_if_data *sdata; |
c3896d2c | 345 | |
d0709a65 JB |
346 | /* |
347 | * This STA is valid because sta_info_destroy() will | |
348 | * del_timer_sync() this timer after having made sure | |
349 | * it cannot be readded (by deleting the plink.) | |
350 | */ | |
c3896d2c LCC |
351 | sta = (struct sta_info *) data; |
352 | ||
5bb644a0 JB |
353 | if (sta->sdata->local->quiescing) { |
354 | sta->plink_timer_was_running = true; | |
355 | return; | |
356 | } | |
357 | ||
07346f81 | 358 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
359 | if (sta->ignore_plink_timer) { |
360 | sta->ignore_plink_timer = false; | |
07346f81 | 361 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
362 | return; |
363 | } | |
0c68ae26 JB |
364 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
365 | sta->sta.addr, sta->plink_state); | |
c3896d2c LCC |
366 | reason = 0; |
367 | llid = sta->llid; | |
368 | plid = sta->plid; | |
d0709a65 | 369 | sdata = sta->sdata; |
c3896d2c LCC |
370 | |
371 | switch (sta->plink_state) { | |
57cf8043 JC |
372 | case NL80211_PLINK_OPN_RCVD: |
373 | case NL80211_PLINK_OPN_SNT: | |
c3896d2c LCC |
374 | /* retry timer */ |
375 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { | |
376 | u32 rand; | |
0c68ae26 JB |
377 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
378 | sta->sta.addr, sta->plink_retries, | |
379 | sta->plink_timeout); | |
c3896d2c LCC |
380 | get_random_bytes(&rand, sizeof(u32)); |
381 | sta->plink_timeout = sta->plink_timeout + | |
382 | rand % sta->plink_timeout; | |
383 | ++sta->plink_retries; | |
d0709a65 | 384 | mod_plink_timer(sta, sta->plink_timeout); |
07346f81 | 385 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
386 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
387 | sta->sta.addr, llid, 0, 0); | |
c3896d2c LCC |
388 | break; |
389 | } | |
54ef656b | 390 | reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES); |
c3896d2c | 391 | /* fall through on else */ |
57cf8043 | 392 | case NL80211_PLINK_CNF_RCVD: |
c3896d2c LCC |
393 | /* confirm timer */ |
394 | if (!reason) | |
54ef656b | 395 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT); |
57cf8043 | 396 | sta->plink_state = NL80211_PLINK_HOLDING; |
d0709a65 | 397 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
07346f81 | 398 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
399 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
400 | sta->sta.addr, llid, plid, reason); | |
c3896d2c | 401 | break; |
57cf8043 | 402 | case NL80211_PLINK_HOLDING: |
c3896d2c | 403 | /* holding timer */ |
d0709a65 | 404 | del_timer(&sta->plink_timer); |
c3896d2c | 405 | mesh_plink_fsm_restart(sta); |
07346f81 | 406 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
407 | break; |
408 | default: | |
07346f81 | 409 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
410 | break; |
411 | } | |
c3896d2c LCC |
412 | } |
413 | ||
5bb644a0 JB |
414 | #ifdef CONFIG_PM |
415 | void mesh_plink_quiesce(struct sta_info *sta) | |
416 | { | |
417 | if (del_timer_sync(&sta->plink_timer)) | |
418 | sta->plink_timer_was_running = true; | |
419 | } | |
420 | ||
421 | void mesh_plink_restart(struct sta_info *sta) | |
422 | { | |
423 | if (sta->plink_timer_was_running) { | |
424 | add_timer(&sta->plink_timer); | |
425 | sta->plink_timer_was_running = false; | |
426 | } | |
427 | } | |
428 | #endif | |
429 | ||
c3896d2c LCC |
430 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
431 | { | |
432 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); | |
433 | sta->plink_timer.data = (unsigned long) sta; | |
434 | sta->plink_timer.function = mesh_plink_timer; | |
435 | sta->plink_timeout = timeout; | |
c3896d2c LCC |
436 | add_timer(&sta->plink_timer); |
437 | } | |
438 | ||
439 | int mesh_plink_open(struct sta_info *sta) | |
440 | { | |
441 | __le16 llid; | |
d0709a65 | 442 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
c3896d2c | 443 | |
c2c98fde | 444 | if (!test_sta_flag(sta, WLAN_STA_AUTH)) |
53e80511 JC |
445 | return -EPERM; |
446 | ||
07346f81 | 447 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
448 | get_random_bytes(&llid, 2); |
449 | sta->llid = llid; | |
57cf8043 | 450 | if (sta->plink_state != NL80211_PLINK_LISTEN) { |
07346f81 | 451 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
452 | return -EBUSY; |
453 | } | |
57cf8043 | 454 | sta->plink_state = NL80211_PLINK_OPN_SNT; |
c3896d2c | 455 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
07346f81 | 456 | spin_unlock_bh(&sta->lock); |
0c68ae26 JB |
457 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
458 | sta->sta.addr); | |
c3896d2c | 459 | |
54ef656b | 460 | return mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
17741cdc | 461 | sta->sta.addr, llid, 0, 0); |
c3896d2c LCC |
462 | } |
463 | ||
464 | void mesh_plink_block(struct sta_info *sta) | |
465 | { | |
c9370197 JL |
466 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
467 | bool deactivated; | |
468 | ||
07346f81 | 469 | spin_lock_bh(&sta->lock); |
c9370197 | 470 | deactivated = __mesh_plink_deactivate(sta); |
57cf8043 | 471 | sta->plink_state = NL80211_PLINK_BLOCKED; |
07346f81 | 472 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
473 | |
474 | if (deactivated) | |
475 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
c3896d2c LCC |
476 | } |
477 | ||
c3896d2c | 478 | |
f698d856 | 479 | void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, |
c3896d2c LCC |
480 | size_t len, struct ieee80211_rx_status *rx_status) |
481 | { | |
d0709a65 | 482 | struct ieee80211_local *local = sdata->local; |
c3896d2c LCC |
483 | struct ieee802_11_elems elems; |
484 | struct sta_info *sta; | |
485 | enum plink_event event; | |
54ef656b | 486 | enum ieee80211_self_protected_actioncode ftype; |
c3896d2c | 487 | size_t baselen; |
d12c7452 | 488 | bool deactivated, matches_local = true; |
c3896d2c LCC |
489 | u8 ie_len; |
490 | u8 *baseaddr; | |
9ebb61a2 | 491 | u32 rates, basic_rates = 0; |
c3896d2c | 492 | __le16 plid, llid, reason; |
1460dd15 RP |
493 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
494 | static const char *mplstates[] = { | |
57cf8043 JC |
495 | [NL80211_PLINK_LISTEN] = "LISTEN", |
496 | [NL80211_PLINK_OPN_SNT] = "OPN-SNT", | |
497 | [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD", | |
498 | [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD", | |
499 | [NL80211_PLINK_ESTAB] = "ESTAB", | |
500 | [NL80211_PLINK_HOLDING] = "HOLDING", | |
501 | [NL80211_PLINK_BLOCKED] = "BLOCKED" | |
1460dd15 RP |
502 | }; |
503 | #endif | |
c3896d2c | 504 | |
9c80d3dc JB |
505 | /* need action_code, aux */ |
506 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) | |
507 | return; | |
508 | ||
c3896d2c LCC |
509 | if (is_multicast_ether_addr(mgmt->da)) { |
510 | mpl_dbg("Mesh plink: ignore frame from multicast address"); | |
511 | return; | |
512 | } | |
513 | ||
8db09850 TP |
514 | baseaddr = mgmt->u.action.u.self_prot.variable; |
515 | baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; | |
516 | if (mgmt->u.action.u.self_prot.action_code == | |
54ef656b | 517 | WLAN_SP_MESH_PEERING_CONFIRM) { |
c3896d2c | 518 | baseaddr += 4; |
70bdb6b2 | 519 | baselen += 4; |
c3896d2c LCC |
520 | } |
521 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); | |
8db09850 | 522 | if (!elems.peering) { |
c3896d2c LCC |
523 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
524 | return; | |
525 | } | |
b130e5ce JC |
526 | if (elems.rsn_len && |
527 | sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { | |
5cff5e01 JC |
528 | mpl_dbg("Mesh plink: can't establish link with secure peer\n"); |
529 | return; | |
530 | } | |
c3896d2c | 531 | |
8db09850 TP |
532 | ftype = mgmt->u.action.u.self_prot.action_code; |
533 | ie_len = elems.peering_len; | |
534 | if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || | |
535 | (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || | |
536 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 | |
537 | && ie_len != 8)) { | |
0938393f RP |
538 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
539 | ftype, ie_len); | |
c3896d2c LCC |
540 | return; |
541 | } | |
542 | ||
54ef656b TP |
543 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
544 | (!elems.mesh_id || !elems.mesh_config)) { | |
c3896d2c LCC |
545 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
546 | return; | |
547 | } | |
548 | /* Note the lines below are correct, the llid in the frame is the plid | |
549 | * from the point of view of this host. | |
550 | */ | |
8db09850 | 551 | memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); |
54ef656b | 552 | if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || |
8db09850 TP |
553 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) |
554 | memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); | |
c3896d2c | 555 | |
d0709a65 JB |
556 | rcu_read_lock(); |
557 | ||
abe60632 | 558 | sta = sta_info_get(sdata, mgmt->sa); |
54ef656b | 559 | if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { |
c3896d2c | 560 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
d0709a65 | 561 | rcu_read_unlock(); |
c3896d2c LCC |
562 | return; |
563 | } | |
564 | ||
55335137 | 565 | if (ftype == WLAN_SP_MESH_PEERING_OPEN && |
3d4f9699 | 566 | !rssi_threshold_check(sta, sdata)) { |
55335137 | 567 | mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n", |
3d4f9699 | 568 | mgmt->sa); |
55335137 AN |
569 | rcu_read_unlock(); |
570 | return; | |
571 | } | |
572 | ||
c2c98fde | 573 | if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) { |
53e80511 JC |
574 | mpl_dbg("Mesh plink: Action frame from non-authed peer\n"); |
575 | rcu_read_unlock(); | |
576 | return; | |
577 | } | |
578 | ||
57cf8043 | 579 | if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) { |
d0709a65 | 580 | rcu_read_unlock(); |
c3896d2c LCC |
581 | return; |
582 | } | |
583 | ||
584 | /* Now we will figure out the appropriate event... */ | |
585 | event = PLINK_UNDEFINED; | |
9ebb61a2 AN |
586 | rates = ieee80211_sta_get_rates(local, &elems, |
587 | rx_status->band, &basic_rates); | |
588 | ||
54ef656b | 589 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
fe40cb62 | 590 | (!mesh_matches_local(&elems, sdata, basic_rates))) { |
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 */ | |
663 | sta = mesh_peer_init(sdata, mgmt->sa, rates, &elems); | |
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 | } |