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 | |
54ab1ffb TP |
271 | * @elems: IEs from beacon or mesh peering frame |
272 | * | |
273 | * call under RCU | |
274 | */ | |
275 | static struct sta_info *mesh_peer_init(struct ieee80211_sub_if_data *sdata, | |
f743ff49 | 276 | u8 *addr, |
54ab1ffb | 277 | struct ieee802_11_elems *elems) |
c3896d2c | 278 | { |
f698d856 | 279 | struct ieee80211_local *local = sdata->local; |
f743ff49 | 280 | enum ieee80211_band band = local->oper_channel->band; |
54ab1ffb | 281 | struct ieee80211_supported_band *sband; |
f743ff49 | 282 | u32 rates, basic_rates = 0; |
c3896d2c LCC |
283 | struct sta_info *sta; |
284 | ||
f743ff49 TP |
285 | sband = local->hw.wiphy->bands[band]; |
286 | rates = ieee80211_sta_get_rates(local, elems, band, &basic_rates); | |
d0709a65 | 287 | |
54ab1ffb | 288 | sta = sta_info_get(sdata, addr); |
c3896d2c | 289 | if (!sta) { |
54ab1ffb | 290 | sta = mesh_plink_alloc(sdata, addr); |
34e89507 | 291 | if (!sta) |
54ab1ffb | 292 | return NULL; |
c3896d2c LCC |
293 | } |
294 | ||
54ab1ffb | 295 | spin_lock_bh(&sta->lock); |
c3896d2c | 296 | sta->last_rx = jiffies; |
f743ff49 | 297 | sta->sta.supp_rates[band] = rates; |
e76781e4 TP |
298 | if (elems->ht_cap_elem && |
299 | sdata->local->_oper_channel_type != NL80211_CHAN_NO_HT) | |
54ab1ffb TP |
300 | ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, |
301 | elems->ht_cap_elem, | |
302 | &sta->sta.ht_cap); | |
303 | else | |
304 | memset(&sta->sta.ht_cap, 0, sizeof(sta->sta.ht_cap)); | |
305 | ||
306 | rate_control_rate_init(sta); | |
307 | spin_unlock_bh(&sta->lock); | |
308 | ||
309 | return sta; | |
310 | } | |
311 | ||
f743ff49 TP |
312 | void mesh_neighbour_update(struct ieee80211_sub_if_data *sdata, |
313 | u8 *hw_addr, | |
54ab1ffb TP |
314 | struct ieee802_11_elems *elems) |
315 | { | |
316 | struct sta_info *sta; | |
317 | ||
318 | /* Userspace handles peer allocation when security is enabled */ | |
319 | if (sdata->u.mesh.security & IEEE80211_MESH_SEC_AUTHED) { | |
320 | cfg80211_notify_new_peer_candidate(sdata->dev, hw_addr, | |
321 | elems->ie_start, | |
322 | elems->total_len, | |
323 | GFP_KERNEL); | |
324 | return; | |
325 | } | |
326 | ||
327 | rcu_read_lock(); | |
f743ff49 | 328 | sta = mesh_peer_init(sdata, hw_addr, elems); |
54ab1ffb TP |
329 | if (!sta) |
330 | goto out; | |
331 | ||
1570ca59 | 332 | if (mesh_peer_accepts_plinks(elems) && |
54ab1ffb TP |
333 | sta->plink_state == NL80211_PLINK_LISTEN && |
334 | sdata->u.mesh.accepting_plinks && | |
335 | sdata->u.mesh.mshcfg.auto_open_plinks && | |
336 | rssi_threshold_check(sta, sdata)) | |
c3896d2c LCC |
337 | mesh_plink_open(sta); |
338 | ||
54ab1ffb | 339 | out: |
d0709a65 | 340 | rcu_read_unlock(); |
c3896d2c LCC |
341 | } |
342 | ||
343 | static void mesh_plink_timer(unsigned long data) | |
344 | { | |
345 | struct sta_info *sta; | |
346 | __le16 llid, plid, reason; | |
c3896d2c | 347 | struct ieee80211_sub_if_data *sdata; |
c3896d2c | 348 | |
d0709a65 JB |
349 | /* |
350 | * This STA is valid because sta_info_destroy() will | |
351 | * del_timer_sync() this timer after having made sure | |
352 | * it cannot be readded (by deleting the plink.) | |
353 | */ | |
c3896d2c LCC |
354 | sta = (struct sta_info *) data; |
355 | ||
5bb644a0 JB |
356 | if (sta->sdata->local->quiescing) { |
357 | sta->plink_timer_was_running = true; | |
358 | return; | |
359 | } | |
360 | ||
07346f81 | 361 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
362 | if (sta->ignore_plink_timer) { |
363 | sta->ignore_plink_timer = false; | |
07346f81 | 364 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
365 | return; |
366 | } | |
0c68ae26 JB |
367 | mpl_dbg("Mesh plink timer for %pM fired on state %d\n", |
368 | sta->sta.addr, sta->plink_state); | |
c3896d2c LCC |
369 | reason = 0; |
370 | llid = sta->llid; | |
371 | plid = sta->plid; | |
d0709a65 | 372 | sdata = sta->sdata; |
c3896d2c LCC |
373 | |
374 | switch (sta->plink_state) { | |
57cf8043 JC |
375 | case NL80211_PLINK_OPN_RCVD: |
376 | case NL80211_PLINK_OPN_SNT: | |
c3896d2c LCC |
377 | /* retry timer */ |
378 | if (sta->plink_retries < dot11MeshMaxRetries(sdata)) { | |
379 | u32 rand; | |
0c68ae26 JB |
380 | mpl_dbg("Mesh plink for %pM (retry, timeout): %d %d\n", |
381 | sta->sta.addr, sta->plink_retries, | |
382 | sta->plink_timeout); | |
c3896d2c LCC |
383 | get_random_bytes(&rand, sizeof(u32)); |
384 | sta->plink_timeout = sta->plink_timeout + | |
385 | rand % sta->plink_timeout; | |
386 | ++sta->plink_retries; | |
d0709a65 | 387 | mod_plink_timer(sta, sta->plink_timeout); |
07346f81 | 388 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
389 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
390 | sta->sta.addr, llid, 0, 0); | |
c3896d2c LCC |
391 | break; |
392 | } | |
54ef656b | 393 | reason = cpu_to_le16(WLAN_REASON_MESH_MAX_RETRIES); |
c3896d2c | 394 | /* fall through on else */ |
57cf8043 | 395 | case NL80211_PLINK_CNF_RCVD: |
c3896d2c LCC |
396 | /* confirm timer */ |
397 | if (!reason) | |
54ef656b | 398 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIRM_TIMEOUT); |
57cf8043 | 399 | sta->plink_state = NL80211_PLINK_HOLDING; |
d0709a65 | 400 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
07346f81 | 401 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
402 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
403 | sta->sta.addr, llid, plid, reason); | |
c3896d2c | 404 | break; |
57cf8043 | 405 | case NL80211_PLINK_HOLDING: |
c3896d2c | 406 | /* holding timer */ |
d0709a65 | 407 | del_timer(&sta->plink_timer); |
c3896d2c | 408 | mesh_plink_fsm_restart(sta); |
07346f81 | 409 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
410 | break; |
411 | default: | |
07346f81 | 412 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
413 | break; |
414 | } | |
c3896d2c LCC |
415 | } |
416 | ||
5bb644a0 JB |
417 | #ifdef CONFIG_PM |
418 | void mesh_plink_quiesce(struct sta_info *sta) | |
419 | { | |
420 | if (del_timer_sync(&sta->plink_timer)) | |
421 | sta->plink_timer_was_running = true; | |
422 | } | |
423 | ||
424 | void mesh_plink_restart(struct sta_info *sta) | |
425 | { | |
426 | if (sta->plink_timer_was_running) { | |
427 | add_timer(&sta->plink_timer); | |
428 | sta->plink_timer_was_running = false; | |
429 | } | |
430 | } | |
431 | #endif | |
432 | ||
c3896d2c LCC |
433 | static inline void mesh_plink_timer_set(struct sta_info *sta, int timeout) |
434 | { | |
435 | sta->plink_timer.expires = jiffies + (HZ * timeout / 1000); | |
436 | sta->plink_timer.data = (unsigned long) sta; | |
437 | sta->plink_timer.function = mesh_plink_timer; | |
438 | sta->plink_timeout = timeout; | |
c3896d2c LCC |
439 | add_timer(&sta->plink_timer); |
440 | } | |
441 | ||
442 | int mesh_plink_open(struct sta_info *sta) | |
443 | { | |
444 | __le16 llid; | |
d0709a65 | 445 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
c3896d2c | 446 | |
c2c98fde | 447 | if (!test_sta_flag(sta, WLAN_STA_AUTH)) |
53e80511 JC |
448 | return -EPERM; |
449 | ||
07346f81 | 450 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
451 | get_random_bytes(&llid, 2); |
452 | sta->llid = llid; | |
57cf8043 | 453 | if (sta->plink_state != NL80211_PLINK_LISTEN) { |
07346f81 | 454 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
455 | return -EBUSY; |
456 | } | |
57cf8043 | 457 | sta->plink_state = NL80211_PLINK_OPN_SNT; |
c3896d2c | 458 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); |
07346f81 | 459 | spin_unlock_bh(&sta->lock); |
0c68ae26 JB |
460 | mpl_dbg("Mesh plink: starting establishment with %pM\n", |
461 | sta->sta.addr); | |
c3896d2c | 462 | |
54ef656b | 463 | return mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_OPEN, |
17741cdc | 464 | sta->sta.addr, llid, 0, 0); |
c3896d2c LCC |
465 | } |
466 | ||
467 | void mesh_plink_block(struct sta_info *sta) | |
468 | { | |
c9370197 JL |
469 | struct ieee80211_sub_if_data *sdata = sta->sdata; |
470 | bool deactivated; | |
471 | ||
07346f81 | 472 | spin_lock_bh(&sta->lock); |
c9370197 | 473 | deactivated = __mesh_plink_deactivate(sta); |
57cf8043 | 474 | sta->plink_state = NL80211_PLINK_BLOCKED; |
07346f81 | 475 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
476 | |
477 | if (deactivated) | |
478 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
c3896d2c LCC |
479 | } |
480 | ||
c3896d2c | 481 | |
f698d856 | 482 | void mesh_rx_plink_frame(struct ieee80211_sub_if_data *sdata, struct ieee80211_mgmt *mgmt, |
c3896d2c LCC |
483 | size_t len, struct ieee80211_rx_status *rx_status) |
484 | { | |
c3896d2c LCC |
485 | struct ieee802_11_elems elems; |
486 | struct sta_info *sta; | |
487 | enum plink_event event; | |
54ef656b | 488 | enum ieee80211_self_protected_actioncode ftype; |
c3896d2c | 489 | size_t baselen; |
d12c7452 | 490 | bool deactivated, matches_local = true; |
c3896d2c LCC |
491 | u8 ie_len; |
492 | u8 *baseaddr; | |
493 | __le16 plid, llid, reason; | |
1460dd15 RP |
494 | #ifdef CONFIG_MAC80211_VERBOSE_MPL_DEBUG |
495 | static const char *mplstates[] = { | |
57cf8043 JC |
496 | [NL80211_PLINK_LISTEN] = "LISTEN", |
497 | [NL80211_PLINK_OPN_SNT] = "OPN-SNT", | |
498 | [NL80211_PLINK_OPN_RCVD] = "OPN-RCVD", | |
499 | [NL80211_PLINK_CNF_RCVD] = "CNF_RCVD", | |
500 | [NL80211_PLINK_ESTAB] = "ESTAB", | |
501 | [NL80211_PLINK_HOLDING] = "HOLDING", | |
502 | [NL80211_PLINK_BLOCKED] = "BLOCKED" | |
1460dd15 RP |
503 | }; |
504 | #endif | |
c3896d2c | 505 | |
9c80d3dc JB |
506 | /* need action_code, aux */ |
507 | if (len < IEEE80211_MIN_ACTION_SIZE + 3) | |
508 | return; | |
509 | ||
c3896d2c LCC |
510 | if (is_multicast_ether_addr(mgmt->da)) { |
511 | mpl_dbg("Mesh plink: ignore frame from multicast address"); | |
512 | return; | |
513 | } | |
514 | ||
8db09850 TP |
515 | baseaddr = mgmt->u.action.u.self_prot.variable; |
516 | baselen = (u8 *) mgmt->u.action.u.self_prot.variable - (u8 *) mgmt; | |
517 | if (mgmt->u.action.u.self_prot.action_code == | |
54ef656b | 518 | WLAN_SP_MESH_PEERING_CONFIRM) { |
c3896d2c | 519 | baseaddr += 4; |
70bdb6b2 | 520 | baselen += 4; |
c3896d2c LCC |
521 | } |
522 | ieee802_11_parse_elems(baseaddr, len - baselen, &elems); | |
8db09850 | 523 | if (!elems.peering) { |
c3896d2c LCC |
524 | mpl_dbg("Mesh plink: missing necessary peer link ie\n"); |
525 | return; | |
526 | } | |
b130e5ce JC |
527 | if (elems.rsn_len && |
528 | sdata->u.mesh.security == IEEE80211_MESH_SEC_NONE) { | |
5cff5e01 JC |
529 | mpl_dbg("Mesh plink: can't establish link with secure peer\n"); |
530 | return; | |
531 | } | |
c3896d2c | 532 | |
8db09850 TP |
533 | ftype = mgmt->u.action.u.self_prot.action_code; |
534 | ie_len = elems.peering_len; | |
535 | if ((ftype == WLAN_SP_MESH_PEERING_OPEN && ie_len != 4) || | |
536 | (ftype == WLAN_SP_MESH_PEERING_CONFIRM && ie_len != 6) || | |
537 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len != 6 | |
538 | && ie_len != 8)) { | |
0938393f RP |
539 | mpl_dbg("Mesh plink: incorrect plink ie length %d %d\n", |
540 | ftype, ie_len); | |
c3896d2c LCC |
541 | return; |
542 | } | |
543 | ||
54ef656b TP |
544 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
545 | (!elems.mesh_id || !elems.mesh_config)) { | |
c3896d2c LCC |
546 | mpl_dbg("Mesh plink: missing necessary ie\n"); |
547 | return; | |
548 | } | |
549 | /* Note the lines below are correct, the llid in the frame is the plid | |
550 | * from the point of view of this host. | |
551 | */ | |
8db09850 | 552 | memcpy(&plid, PLINK_GET_LLID(elems.peering), 2); |
54ef656b | 553 | if (ftype == WLAN_SP_MESH_PEERING_CONFIRM || |
8db09850 TP |
554 | (ftype == WLAN_SP_MESH_PEERING_CLOSE && ie_len == 8)) |
555 | memcpy(&llid, PLINK_GET_PLID(elems.peering), 2); | |
c3896d2c | 556 | |
d0709a65 JB |
557 | rcu_read_lock(); |
558 | ||
abe60632 | 559 | sta = sta_info_get(sdata, mgmt->sa); |
54ef656b | 560 | if (!sta && ftype != WLAN_SP_MESH_PEERING_OPEN) { |
c3896d2c | 561 | mpl_dbg("Mesh plink: cls or cnf from unknown peer\n"); |
d0709a65 | 562 | rcu_read_unlock(); |
c3896d2c LCC |
563 | return; |
564 | } | |
565 | ||
55335137 | 566 | if (ftype == WLAN_SP_MESH_PEERING_OPEN && |
3d4f9699 | 567 | !rssi_threshold_check(sta, sdata)) { |
55335137 | 568 | mpl_dbg("Mesh plink: %pM does not meet rssi threshold\n", |
3d4f9699 | 569 | mgmt->sa); |
55335137 AN |
570 | rcu_read_unlock(); |
571 | return; | |
572 | } | |
573 | ||
c2c98fde | 574 | if (sta && !test_sta_flag(sta, WLAN_STA_AUTH)) { |
53e80511 JC |
575 | mpl_dbg("Mesh plink: Action frame from non-authed peer\n"); |
576 | rcu_read_unlock(); | |
577 | return; | |
578 | } | |
579 | ||
57cf8043 | 580 | if (sta && sta->plink_state == NL80211_PLINK_BLOCKED) { |
d0709a65 | 581 | rcu_read_unlock(); |
c3896d2c LCC |
582 | return; |
583 | } | |
584 | ||
585 | /* Now we will figure out the appropriate event... */ | |
586 | event = PLINK_UNDEFINED; | |
54ef656b | 587 | if (ftype != WLAN_SP_MESH_PEERING_CLOSE && |
f743ff49 | 588 | !mesh_matches_local(sdata, &elems)) { |
d12c7452 | 589 | matches_local = false; |
c3896d2c | 590 | switch (ftype) { |
54ef656b | 591 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c LCC |
592 | event = OPN_RJCT; |
593 | break; | |
54ef656b | 594 | case WLAN_SP_MESH_PEERING_CONFIRM: |
c3896d2c LCC |
595 | event = CNF_RJCT; |
596 | break; | |
54ef656b | 597 | default: |
c3896d2c LCC |
598 | break; |
599 | } | |
d12c7452 CL |
600 | } |
601 | ||
602 | if (!sta && !matches_local) { | |
603 | rcu_read_unlock(); | |
54ef656b | 604 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
d12c7452 | 605 | llid = 0; |
54ef656b TP |
606 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
607 | mgmt->sa, llid, plid, reason); | |
d12c7452 | 608 | return; |
c3896d2c | 609 | } else if (!sta) { |
54ef656b | 610 | /* ftype == WLAN_SP_MESH_PEERING_OPEN */ |
c3896d2c LCC |
611 | if (!mesh_plink_free_count(sdata)) { |
612 | mpl_dbg("Mesh plink error: no more free plinks\n"); | |
73651ee6 JB |
613 | rcu_read_unlock(); |
614 | return; | |
615 | } | |
c3896d2c | 616 | event = OPN_ACPT; |
d12c7452 | 617 | } else if (matches_local) { |
c3896d2c | 618 | switch (ftype) { |
54ef656b | 619 | case WLAN_SP_MESH_PEERING_OPEN: |
c3896d2c | 620 | if (!mesh_plink_free_count(sdata) || |
d0709a65 | 621 | (sta->plid && sta->plid != plid)) |
c3896d2c LCC |
622 | event = OPN_IGNR; |
623 | else | |
624 | event = OPN_ACPT; | |
625 | break; | |
54ef656b | 626 | case WLAN_SP_MESH_PEERING_CONFIRM: |
c3896d2c | 627 | if (!mesh_plink_free_count(sdata) || |
d0709a65 | 628 | (sta->llid != llid || sta->plid != plid)) |
c3896d2c LCC |
629 | event = CNF_IGNR; |
630 | else | |
631 | event = CNF_ACPT; | |
632 | break; | |
54ef656b | 633 | case WLAN_SP_MESH_PEERING_CLOSE: |
57cf8043 | 634 | if (sta->plink_state == NL80211_PLINK_ESTAB) |
c3896d2c LCC |
635 | /* Do not check for llid or plid. This does not |
636 | * follow the standard but since multiple plinks | |
637 | * per sta are not supported, it is necessary in | |
638 | * order to avoid a livelock when MP A sees an | |
639 | * establish peer link to MP B but MP B does not | |
640 | * see it. This can be caused by a timeout in | |
641 | * B's peer link establishment or B beign | |
642 | * restarted. | |
643 | */ | |
644 | event = CLS_ACPT; | |
645 | else if (sta->plid != plid) | |
646 | event = CLS_IGNR; | |
647 | else if (ie_len == 7 && sta->llid != llid) | |
648 | event = CLS_IGNR; | |
649 | else | |
650 | event = CLS_ACPT; | |
651 | break; | |
652 | default: | |
653 | mpl_dbg("Mesh plink: unknown frame subtype\n"); | |
d0709a65 | 654 | rcu_read_unlock(); |
c3896d2c LCC |
655 | return; |
656 | } | |
54ab1ffb TP |
657 | } |
658 | ||
659 | if (event == OPN_ACPT) { | |
660 | /* allocate sta entry if necessary and update info */ | |
f743ff49 | 661 | sta = mesh_peer_init(sdata, mgmt->sa, &elems); |
54ab1ffb TP |
662 | if (!sta) { |
663 | mpl_dbg("Mesh plink: failed to init peer!\n"); | |
664 | rcu_read_unlock(); | |
665 | return; | |
666 | } | |
c3896d2c LCC |
667 | } |
668 | ||
1460dd15 RP |
669 | mpl_dbg("Mesh plink (peer, state, llid, plid, event): %pM %s %d %d %d\n", |
670 | mgmt->sa, mplstates[sta->plink_state], | |
0c68ae26 JB |
671 | le16_to_cpu(sta->llid), le16_to_cpu(sta->plid), |
672 | event); | |
c3896d2c | 673 | reason = 0; |
54ab1ffb | 674 | spin_lock_bh(&sta->lock); |
c3896d2c LCC |
675 | switch (sta->plink_state) { |
676 | /* spin_unlock as soon as state is updated at each case */ | |
57cf8043 | 677 | case NL80211_PLINK_LISTEN: |
c3896d2c LCC |
678 | switch (event) { |
679 | case CLS_ACPT: | |
680 | mesh_plink_fsm_restart(sta); | |
07346f81 | 681 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
682 | break; |
683 | case OPN_ACPT: | |
57cf8043 | 684 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
c3896d2c LCC |
685 | sta->plid = plid; |
686 | get_random_bytes(&llid, 2); | |
687 | sta->llid = llid; | |
688 | mesh_plink_timer_set(sta, dot11MeshRetryTimeout(sdata)); | |
07346f81 | 689 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
690 | mesh_plink_frame_tx(sdata, |
691 | WLAN_SP_MESH_PEERING_OPEN, | |
692 | sta->sta.addr, llid, 0, 0); | |
693 | mesh_plink_frame_tx(sdata, | |
694 | WLAN_SP_MESH_PEERING_CONFIRM, | |
695 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
696 | break; |
697 | default: | |
07346f81 | 698 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
699 | break; |
700 | } | |
701 | break; | |
702 | ||
57cf8043 | 703 | case NL80211_PLINK_OPN_SNT: |
c3896d2c LCC |
704 | switch (event) { |
705 | case OPN_RJCT: | |
706 | case CNF_RJCT: | |
54ef656b | 707 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
708 | case CLS_ACPT: |
709 | if (!reason) | |
54ef656b | 710 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 711 | sta->reason = reason; |
57cf8043 | 712 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
713 | if (!mod_plink_timer(sta, |
714 | dot11MeshHoldingTimeout(sdata))) | |
715 | sta->ignore_plink_timer = true; | |
716 | ||
717 | llid = sta->llid; | |
07346f81 | 718 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
719 | mesh_plink_frame_tx(sdata, |
720 | WLAN_SP_MESH_PEERING_CLOSE, | |
721 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
722 | break; |
723 | case OPN_ACPT: | |
724 | /* retry timer is left untouched */ | |
57cf8043 | 725 | sta->plink_state = NL80211_PLINK_OPN_RCVD; |
c3896d2c LCC |
726 | sta->plid = plid; |
727 | llid = sta->llid; | |
07346f81 | 728 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
729 | mesh_plink_frame_tx(sdata, |
730 | WLAN_SP_MESH_PEERING_CONFIRM, | |
731 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
732 | break; |
733 | case CNF_ACPT: | |
57cf8043 | 734 | sta->plink_state = NL80211_PLINK_CNF_RCVD; |
c3896d2c LCC |
735 | if (!mod_plink_timer(sta, |
736 | dot11MeshConfirmTimeout(sdata))) | |
737 | sta->ignore_plink_timer = true; | |
738 | ||
07346f81 | 739 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
740 | break; |
741 | default: | |
07346f81 | 742 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
743 | break; |
744 | } | |
745 | break; | |
746 | ||
57cf8043 | 747 | case NL80211_PLINK_OPN_RCVD: |
c3896d2c LCC |
748 | switch (event) { |
749 | case OPN_RJCT: | |
750 | case CNF_RJCT: | |
54ef656b | 751 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
752 | case CLS_ACPT: |
753 | if (!reason) | |
54ef656b | 754 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 755 | sta->reason = reason; |
57cf8043 | 756 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
757 | if (!mod_plink_timer(sta, |
758 | dot11MeshHoldingTimeout(sdata))) | |
759 | sta->ignore_plink_timer = true; | |
760 | ||
761 | llid = sta->llid; | |
07346f81 | 762 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
763 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
764 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
765 | break; |
766 | case OPN_ACPT: | |
767 | llid = sta->llid; | |
07346f81 | 768 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
769 | mesh_plink_frame_tx(sdata, |
770 | WLAN_SP_MESH_PEERING_CONFIRM, | |
771 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
772 | break; |
773 | case CNF_ACPT: | |
d0709a65 | 774 | del_timer(&sta->plink_timer); |
57cf8043 | 775 | sta->plink_state = NL80211_PLINK_ESTAB; |
07346f81 | 776 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
777 | mesh_plink_inc_estab_count(sdata); |
778 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
0c68ae26 JB |
779 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
780 | sta->sta.addr); | |
c3896d2c LCC |
781 | break; |
782 | default: | |
07346f81 | 783 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
784 | break; |
785 | } | |
786 | break; | |
787 | ||
57cf8043 | 788 | case NL80211_PLINK_CNF_RCVD: |
c3896d2c LCC |
789 | switch (event) { |
790 | case OPN_RJCT: | |
791 | case CNF_RJCT: | |
54ef656b | 792 | reason = cpu_to_le16(WLAN_REASON_MESH_CONFIG); |
c3896d2c LCC |
793 | case CLS_ACPT: |
794 | if (!reason) | |
54ef656b | 795 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 796 | sta->reason = reason; |
57cf8043 | 797 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c LCC |
798 | if (!mod_plink_timer(sta, |
799 | dot11MeshHoldingTimeout(sdata))) | |
800 | sta->ignore_plink_timer = true; | |
801 | ||
802 | llid = sta->llid; | |
07346f81 | 803 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
804 | mesh_plink_frame_tx(sdata, |
805 | WLAN_SP_MESH_PEERING_CLOSE, | |
806 | sta->sta.addr, llid, plid, reason); | |
ff59dc76 | 807 | break; |
c3896d2c | 808 | case OPN_ACPT: |
d0709a65 | 809 | del_timer(&sta->plink_timer); |
57cf8043 | 810 | sta->plink_state = NL80211_PLINK_ESTAB; |
07346f81 | 811 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
812 | mesh_plink_inc_estab_count(sdata); |
813 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
0c68ae26 JB |
814 | mpl_dbg("Mesh plink with %pM ESTABLISHED\n", |
815 | sta->sta.addr); | |
54ef656b TP |
816 | mesh_plink_frame_tx(sdata, |
817 | WLAN_SP_MESH_PEERING_CONFIRM, | |
818 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
819 | break; |
820 | default: | |
07346f81 | 821 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
822 | break; |
823 | } | |
824 | break; | |
825 | ||
57cf8043 | 826 | case NL80211_PLINK_ESTAB: |
c3896d2c LCC |
827 | switch (event) { |
828 | case CLS_ACPT: | |
54ef656b | 829 | reason = cpu_to_le16(WLAN_REASON_MESH_CLOSE); |
c3896d2c | 830 | sta->reason = reason; |
c9370197 | 831 | deactivated = __mesh_plink_deactivate(sta); |
57cf8043 | 832 | sta->plink_state = NL80211_PLINK_HOLDING; |
c3896d2c | 833 | llid = sta->llid; |
d0709a65 | 834 | mod_plink_timer(sta, dot11MeshHoldingTimeout(sdata)); |
07346f81 | 835 | spin_unlock_bh(&sta->lock); |
c9370197 JL |
836 | if (deactivated) |
837 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON); | |
54ef656b TP |
838 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
839 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
840 | break; |
841 | case OPN_ACPT: | |
842 | llid = sta->llid; | |
07346f81 | 843 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
844 | mesh_plink_frame_tx(sdata, |
845 | WLAN_SP_MESH_PEERING_CONFIRM, | |
846 | sta->sta.addr, llid, plid, 0); | |
c3896d2c LCC |
847 | break; |
848 | default: | |
07346f81 | 849 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
850 | break; |
851 | } | |
852 | break; | |
57cf8043 | 853 | case NL80211_PLINK_HOLDING: |
c3896d2c LCC |
854 | switch (event) { |
855 | case CLS_ACPT: | |
d0709a65 | 856 | if (del_timer(&sta->plink_timer)) |
c3896d2c | 857 | sta->ignore_plink_timer = 1; |
c3896d2c | 858 | mesh_plink_fsm_restart(sta); |
07346f81 | 859 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
860 | break; |
861 | case OPN_ACPT: | |
862 | case CNF_ACPT: | |
863 | case OPN_RJCT: | |
864 | case CNF_RJCT: | |
865 | llid = sta->llid; | |
866 | reason = sta->reason; | |
07346f81 | 867 | spin_unlock_bh(&sta->lock); |
54ef656b TP |
868 | mesh_plink_frame_tx(sdata, WLAN_SP_MESH_PEERING_CLOSE, |
869 | sta->sta.addr, llid, plid, reason); | |
c3896d2c LCC |
870 | break; |
871 | default: | |
07346f81 | 872 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
873 | } |
874 | break; | |
875 | default: | |
b4e08ea1 | 876 | /* should not get here, PLINK_BLOCKED is dealt with at the |
3ad2f3fb | 877 | * beginning of the function |
c3896d2c | 878 | */ |
07346f81 | 879 | spin_unlock_bh(&sta->lock); |
c3896d2c LCC |
880 | break; |
881 | } | |
d0709a65 JB |
882 | |
883 | rcu_read_unlock(); | |
c3896d2c | 884 | } |