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Commit | Line | Data |
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95224fe8 AN |
1 | /* |
2 | * mac80211 TDLS handling code | |
3 | * | |
4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> | |
5 | * Copyright 2014, Intel Corporation | |
d98ad83e | 6 | * Copyright 2014 Intel Mobile Communications GmbH |
95224fe8 AN |
7 | * |
8 | * This file is GPLv2 as found in COPYING. | |
9 | */ | |
10 | ||
11 | #include <linux/ieee80211.h> | |
6f7eaa47 | 12 | #include <linux/log2.h> |
c887f0d3 | 13 | #include <net/cfg80211.h> |
95224fe8 | 14 | #include "ieee80211_i.h" |
ee10f2c7 | 15 | #include "driver-ops.h" |
95224fe8 | 16 | |
17e6a59a AN |
17 | /* give usermode some time for retries in setting up the TDLS session */ |
18 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) | |
19 | ||
20 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) | |
21 | { | |
22 | struct ieee80211_sub_if_data *sdata; | |
23 | struct ieee80211_local *local; | |
24 | ||
25 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
81dd2b88 | 26 | u.mgd.tdls_peer_del_work.work); |
17e6a59a AN |
27 | local = sdata->local; |
28 | ||
29 | mutex_lock(&local->mtx); | |
81dd2b88 AN |
30 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
31 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); | |
32 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); | |
33 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
34 | } |
35 | mutex_unlock(&local->mtx); | |
36 | } | |
37 | ||
95224fe8 AN |
38 | static void ieee80211_tdls_add_ext_capab(struct sk_buff *skb) |
39 | { | |
40 | u8 *pos = (void *)skb_put(skb, 7); | |
41 | ||
42 | *pos++ = WLAN_EID_EXT_CAPABILITY; | |
43 | *pos++ = 5; /* len */ | |
44 | *pos++ = 0x0; | |
45 | *pos++ = 0x0; | |
46 | *pos++ = 0x0; | |
47 | *pos++ = 0x0; | |
48 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; | |
49 | } | |
50 | ||
f0d29cb9 AN |
51 | static u8 |
52 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, | |
53 | struct sk_buff *skb, u16 start, u16 end, | |
54 | u16 spacing) | |
55 | { | |
56 | u8 subband_cnt = 0, ch_cnt = 0; | |
57 | struct ieee80211_channel *ch; | |
58 | struct cfg80211_chan_def chandef; | |
59 | int i, subband_start; | |
60 | ||
61 | for (i = start; i <= end; i += spacing) { | |
62 | if (!ch_cnt) | |
63 | subband_start = i; | |
64 | ||
65 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); | |
66 | if (ch) { | |
67 | /* we will be active on the channel */ | |
68 | u32 flags = IEEE80211_CHAN_DISABLED | | |
69 | IEEE80211_CHAN_NO_IR; | |
70 | cfg80211_chandef_create(&chandef, ch, | |
71 | NL80211_CHAN_HT20); | |
72 | if (cfg80211_chandef_usable(sdata->local->hw.wiphy, | |
73 | &chandef, flags)) { | |
74 | ch_cnt++; | |
75 | continue; | |
76 | } | |
77 | } | |
78 | ||
79 | if (ch_cnt) { | |
80 | u8 *pos = skb_put(skb, 2); | |
81 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
82 | *pos++ = ch_cnt; | |
83 | ||
84 | subband_cnt++; | |
85 | ch_cnt = 0; | |
86 | } | |
87 | } | |
88 | ||
89 | return subband_cnt; | |
90 | } | |
91 | ||
92 | static void | |
93 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, | |
94 | struct sk_buff *skb) | |
95 | { | |
96 | /* | |
97 | * Add possible channels for TDLS. These are channels that are allowed | |
98 | * to be active. | |
99 | */ | |
100 | u8 subband_cnt; | |
101 | u8 *pos = skb_put(skb, 2); | |
102 | ||
103 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
104 | ||
105 | /* | |
106 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as | |
107 | * this doesn't happen in real world scenarios. | |
108 | */ | |
109 | ||
110 | /* 2GHz, with 5MHz spacing */ | |
111 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); | |
112 | ||
113 | /* 5GHz, with 20MHz spacing */ | |
114 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); | |
115 | ||
116 | /* length */ | |
117 | *pos = 2 * subband_cnt; | |
118 | } | |
119 | ||
2cedd879 AN |
120 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
121 | { | |
122 | u8 *pos = (void *)skb_put(skb, 3); | |
123 | ||
124 | *pos++ = WLAN_EID_BSS_COEX_2040; | |
125 | *pos++ = 1; /* len */ | |
126 | ||
127 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; | |
128 | } | |
129 | ||
dd8c0b03 AN |
130 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
131 | u16 status_code) | |
95224fe8 AN |
132 | { |
133 | struct ieee80211_local *local = sdata->local; | |
134 | u16 capab; | |
135 | ||
dd8c0b03 AN |
136 | /* The capability will be 0 when sending a failure code */ |
137 | if (status_code != 0) | |
138 | return 0; | |
139 | ||
95224fe8 AN |
140 | capab = 0; |
141 | if (ieee80211_get_sdata_band(sdata) != IEEE80211_BAND_2GHZ) | |
142 | return capab; | |
143 | ||
144 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE)) | |
145 | capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; | |
146 | if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE)) | |
147 | capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; | |
148 | ||
149 | return capab; | |
150 | } | |
151 | ||
1606ef4a AN |
152 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
153 | struct sk_buff *skb, const u8 *peer, | |
154 | bool initiator) | |
95224fe8 AN |
155 | { |
156 | struct ieee80211_tdls_lnkie *lnkid; | |
1606ef4a AN |
157 | const u8 *init_addr, *rsp_addr; |
158 | ||
159 | if (initiator) { | |
160 | init_addr = sdata->vif.addr; | |
161 | rsp_addr = peer; | |
162 | } else { | |
163 | init_addr = peer; | |
164 | rsp_addr = sdata->vif.addr; | |
165 | } | |
95224fe8 AN |
166 | |
167 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); | |
168 | ||
169 | lnkid->ie_type = WLAN_EID_LINK_ID; | |
170 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; | |
171 | ||
1606ef4a AN |
172 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
173 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); | |
174 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); | |
95224fe8 AN |
175 | } |
176 | ||
6f7eaa47 AN |
177 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
178 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) | |
179 | { | |
180 | switch (ac) { | |
181 | default: | |
182 | WARN_ON_ONCE(1); | |
183 | case 0: | |
184 | return IEEE80211_AC_BE; | |
185 | case 1: | |
186 | return IEEE80211_AC_BK; | |
187 | case 2: | |
188 | return IEEE80211_AC_VI; | |
189 | case 3: | |
190 | return IEEE80211_AC_VO; | |
191 | } | |
192 | } | |
193 | ||
194 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) | |
195 | { | |
196 | u8 ret; | |
197 | ||
198 | ret = aifsn & 0x0f; | |
199 | if (acm) | |
200 | ret |= 0x10; | |
201 | ret |= (aci << 5) & 0x60; | |
202 | return ret; | |
203 | } | |
204 | ||
205 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) | |
206 | { | |
207 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | | |
208 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); | |
209 | } | |
210 | ||
211 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, | |
212 | struct sk_buff *skb) | |
213 | { | |
214 | struct ieee80211_wmm_param_ie *wmm; | |
215 | struct ieee80211_tx_queue_params *txq; | |
216 | int i; | |
217 | ||
218 | wmm = (void *)skb_put(skb, sizeof(*wmm)); | |
219 | memset(wmm, 0, sizeof(*wmm)); | |
220 | ||
221 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; | |
222 | wmm->len = sizeof(*wmm) - 2; | |
223 | ||
224 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ | |
225 | wmm->oui[1] = 0x50; | |
226 | wmm->oui[2] = 0xf2; | |
227 | wmm->oui_type = 2; /* WME */ | |
228 | wmm->oui_subtype = 1; /* WME param */ | |
229 | wmm->version = 1; /* WME ver */ | |
230 | wmm->qos_info = 0; /* U-APSD not in use */ | |
231 | ||
232 | /* | |
233 | * Use the EDCA parameters defined for the BSS, or default if the AP | |
234 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 | |
235 | */ | |
236 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
237 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; | |
238 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, | |
239 | txq->acm, i); | |
240 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); | |
241 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); | |
242 | } | |
243 | } | |
244 | ||
f09a87d2 AN |
245 | static void |
246 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, | |
247 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
248 | u8 action_code, bool initiator, |
249 | const u8 *extra_ies, size_t extra_ies_len) | |
f09a87d2 AN |
250 | { |
251 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
40b861a0 | 252 | struct ieee80211_local *local = sdata->local; |
13cc8a4a AN |
253 | struct ieee80211_supported_band *sband; |
254 | struct ieee80211_sta_ht_cap ht_cap; | |
255 | struct sta_info *sta = NULL; | |
f09a87d2 AN |
256 | size_t offset = 0, noffset; |
257 | u8 *pos; | |
258 | ||
13cc8a4a AN |
259 | rcu_read_lock(); |
260 | ||
261 | /* we should have the peer STA if we're already responding */ | |
262 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { | |
263 | sta = sta_info_get(sdata, peer); | |
264 | if (WARN_ON_ONCE(!sta)) { | |
265 | rcu_read_unlock(); | |
266 | return; | |
267 | } | |
268 | } | |
269 | ||
f09a87d2 AN |
270 | ieee80211_add_srates_ie(sdata, skb, false, band); |
271 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); | |
f0d29cb9 | 272 | ieee80211_tdls_add_supp_channels(sdata, skb); |
f09a87d2 AN |
273 | |
274 | /* add any custom IEs that go before Extended Capabilities */ | |
275 | if (extra_ies_len) { | |
276 | static const u8 before_ext_cap[] = { | |
277 | WLAN_EID_SUPP_RATES, | |
278 | WLAN_EID_COUNTRY, | |
279 | WLAN_EID_EXT_SUPP_RATES, | |
280 | WLAN_EID_SUPPORTED_CHANNELS, | |
281 | WLAN_EID_RSN, | |
282 | }; | |
283 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
284 | before_ext_cap, | |
285 | ARRAY_SIZE(before_ext_cap), | |
286 | offset); | |
287 | pos = skb_put(skb, noffset - offset); | |
288 | memcpy(pos, extra_ies + offset, noffset - offset); | |
289 | offset = noffset; | |
290 | } | |
291 | ||
292 | ieee80211_tdls_add_ext_capab(skb); | |
293 | ||
40b861a0 AN |
294 | /* add the QoS element if we support it */ |
295 | if (local->hw.queues >= IEEE80211_NUM_ACS && | |
296 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) | |
297 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ | |
298 | ||
f09a87d2 AN |
299 | /* add any custom IEs that go before HT capabilities */ |
300 | if (extra_ies_len) { | |
301 | static const u8 before_ht_cap[] = { | |
302 | WLAN_EID_SUPP_RATES, | |
303 | WLAN_EID_COUNTRY, | |
304 | WLAN_EID_EXT_SUPP_RATES, | |
305 | WLAN_EID_SUPPORTED_CHANNELS, | |
306 | WLAN_EID_RSN, | |
307 | WLAN_EID_EXT_CAPABILITY, | |
308 | WLAN_EID_QOS_CAPA, | |
309 | WLAN_EID_FAST_BSS_TRANSITION, | |
310 | WLAN_EID_TIMEOUT_INTERVAL, | |
311 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
312 | }; | |
313 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
314 | before_ht_cap, | |
315 | ARRAY_SIZE(before_ht_cap), | |
316 | offset); | |
317 | pos = skb_put(skb, noffset - offset); | |
318 | memcpy(pos, extra_ies + offset, noffset - offset); | |
319 | offset = noffset; | |
320 | } | |
321 | ||
13cc8a4a AN |
322 | /* |
323 | * with TDLS we can switch channels, and HT-caps are not necessarily | |
324 | * the same on all bands. The specification limits the setup to a | |
325 | * single HT-cap, so use the current band for now. | |
326 | */ | |
327 | sband = local->hw.wiphy->bands[band]; | |
328 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
329 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || | |
330 | action_code == WLAN_TDLS_SETUP_RESPONSE) && | |
331 | ht_cap.ht_supported && (!sta || sta->sta.ht_cap.ht_supported)) { | |
332 | if (action_code == WLAN_TDLS_SETUP_REQUEST) { | |
333 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); | |
334 | ||
335 | /* disable SMPS in TDLS initiator */ | |
336 | ht_cap.cap |= (WLAN_HT_CAP_SM_PS_DISABLED | |
337 | << IEEE80211_HT_CAP_SM_PS_SHIFT); | |
338 | } else { | |
339 | /* disable SMPS in TDLS responder */ | |
340 | sta->sta.ht_cap.cap |= | |
341 | (WLAN_HT_CAP_SM_PS_DISABLED | |
342 | << IEEE80211_HT_CAP_SM_PS_SHIFT); | |
343 | ||
344 | /* the peer caps are already intersected with our own */ | |
345 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); | |
346 | } | |
347 | ||
348 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
349 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
350 | } | |
351 | ||
352 | rcu_read_unlock(); | |
353 | ||
2cedd879 AN |
354 | if (ht_cap.ht_supported && |
355 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
356 | ieee80211_tdls_add_bss_coex_ie(skb); | |
357 | ||
f09a87d2 AN |
358 | /* add any remaining IEs */ |
359 | if (extra_ies_len) { | |
360 | noffset = extra_ies_len; | |
361 | pos = skb_put(skb, noffset - offset); | |
362 | memcpy(pos, extra_ies + offset, noffset - offset); | |
363 | } | |
1606ef4a AN |
364 | |
365 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
f09a87d2 AN |
366 | } |
367 | ||
6f7eaa47 AN |
368 | static void |
369 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, | |
370 | struct sk_buff *skb, const u8 *peer, | |
371 | bool initiator, const u8 *extra_ies, | |
372 | size_t extra_ies_len) | |
373 | { | |
374 | struct ieee80211_local *local = sdata->local; | |
13cc8a4a | 375 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6f7eaa47 | 376 | size_t offset = 0, noffset; |
13cc8a4a | 377 | struct sta_info *sta, *ap_sta; |
6f7eaa47 AN |
378 | u8 *pos; |
379 | ||
380 | rcu_read_lock(); | |
381 | ||
382 | sta = sta_info_get(sdata, peer); | |
13cc8a4a AN |
383 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
384 | if (WARN_ON_ONCE(!sta || !ap_sta)) { | |
6f7eaa47 AN |
385 | rcu_read_unlock(); |
386 | return; | |
387 | } | |
388 | ||
389 | /* add any custom IEs that go before the QoS IE */ | |
390 | if (extra_ies_len) { | |
391 | static const u8 before_qos[] = { | |
392 | WLAN_EID_RSN, | |
393 | }; | |
394 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
395 | before_qos, | |
396 | ARRAY_SIZE(before_qos), | |
397 | offset); | |
398 | pos = skb_put(skb, noffset - offset); | |
399 | memcpy(pos, extra_ies + offset, noffset - offset); | |
400 | offset = noffset; | |
401 | } | |
402 | ||
403 | /* add the QoS param IE if both the peer and we support it */ | |
a74a8c84 | 404 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
6f7eaa47 AN |
405 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
406 | ||
13cc8a4a AN |
407 | /* add any custom IEs that go before HT operation */ |
408 | if (extra_ies_len) { | |
409 | static const u8 before_ht_op[] = { | |
410 | WLAN_EID_RSN, | |
411 | WLAN_EID_QOS_CAPA, | |
412 | WLAN_EID_FAST_BSS_TRANSITION, | |
413 | WLAN_EID_TIMEOUT_INTERVAL, | |
414 | }; | |
415 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
416 | before_ht_op, | |
417 | ARRAY_SIZE(before_ht_op), | |
418 | offset); | |
419 | pos = skb_put(skb, noffset - offset); | |
420 | memcpy(pos, extra_ies + offset, noffset - offset); | |
421 | offset = noffset; | |
422 | } | |
423 | ||
424 | /* if HT support is only added in TDLS, we need an HT-operation IE */ | |
425 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
426 | struct ieee80211_chanctx_conf *chanctx_conf = | |
427 | rcu_dereference(sdata->vif.chanctx_conf); | |
428 | if (!WARN_ON(!chanctx_conf)) { | |
429 | pos = skb_put(skb, 2 + | |
430 | sizeof(struct ieee80211_ht_operation)); | |
431 | /* send an empty HT operation IE */ | |
432 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, | |
433 | &chanctx_conf->def, 0); | |
434 | } | |
435 | } | |
436 | ||
437 | rcu_read_unlock(); | |
438 | ||
6f7eaa47 AN |
439 | /* add any remaining IEs */ |
440 | if (extra_ies_len) { | |
441 | noffset = extra_ies_len; | |
442 | pos = skb_put(skb, noffset - offset); | |
443 | memcpy(pos, extra_ies + offset, noffset - offset); | |
444 | } | |
445 | ||
446 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
6f7eaa47 AN |
447 | } |
448 | ||
46792a2d AN |
449 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
450 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
451 | u8 action_code, u16 status_code, |
452 | bool initiator, const u8 *extra_ies, | |
453 | size_t extra_ies_len) | |
46792a2d | 454 | { |
46792a2d AN |
455 | switch (action_code) { |
456 | case WLAN_TDLS_SETUP_REQUEST: | |
457 | case WLAN_TDLS_SETUP_RESPONSE: | |
458 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
1606ef4a AN |
459 | if (status_code == 0) |
460 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, | |
461 | action_code, | |
462 | initiator, | |
463 | extra_ies, | |
464 | extra_ies_len); | |
46792a2d AN |
465 | break; |
466 | case WLAN_TDLS_SETUP_CONFIRM: | |
6f7eaa47 AN |
467 | if (status_code == 0) |
468 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, | |
469 | initiator, extra_ies, | |
470 | extra_ies_len); | |
471 | break; | |
46792a2d AN |
472 | case WLAN_TDLS_TEARDOWN: |
473 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
f09a87d2 AN |
474 | if (extra_ies_len) |
475 | memcpy(skb_put(skb, extra_ies_len), extra_ies, | |
476 | extra_ies_len); | |
1606ef4a AN |
477 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
478 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
46792a2d AN |
479 | break; |
480 | } | |
481 | ||
46792a2d AN |
482 | } |
483 | ||
95224fe8 AN |
484 | static int |
485 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 486 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
487 | u16 status_code, struct sk_buff *skb) |
488 | { | |
489 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
490 | struct ieee80211_tdls_data *tf; |
491 | ||
492 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); | |
493 | ||
494 | memcpy(tf->da, peer, ETH_ALEN); | |
495 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); | |
496 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); | |
497 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; | |
498 | ||
59cd85cb AN |
499 | /* network header is after the ethernet header */ |
500 | skb_set_network_header(skb, ETH_HLEN); | |
501 | ||
95224fe8 AN |
502 | switch (action_code) { |
503 | case WLAN_TDLS_SETUP_REQUEST: | |
504 | tf->category = WLAN_CATEGORY_TDLS; | |
505 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; | |
506 | ||
507 | skb_put(skb, sizeof(tf->u.setup_req)); | |
508 | tf->u.setup_req.dialog_token = dialog_token; | |
509 | tf->u.setup_req.capability = | |
dd8c0b03 AN |
510 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
511 | status_code)); | |
95224fe8 AN |
512 | break; |
513 | case WLAN_TDLS_SETUP_RESPONSE: | |
514 | tf->category = WLAN_CATEGORY_TDLS; | |
515 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; | |
516 | ||
517 | skb_put(skb, sizeof(tf->u.setup_resp)); | |
518 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); | |
519 | tf->u.setup_resp.dialog_token = dialog_token; | |
520 | tf->u.setup_resp.capability = | |
dd8c0b03 AN |
521 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
522 | status_code)); | |
95224fe8 AN |
523 | break; |
524 | case WLAN_TDLS_SETUP_CONFIRM: | |
525 | tf->category = WLAN_CATEGORY_TDLS; | |
526 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; | |
527 | ||
528 | skb_put(skb, sizeof(tf->u.setup_cfm)); | |
529 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); | |
530 | tf->u.setup_cfm.dialog_token = dialog_token; | |
531 | break; | |
532 | case WLAN_TDLS_TEARDOWN: | |
533 | tf->category = WLAN_CATEGORY_TDLS; | |
534 | tf->action_code = WLAN_TDLS_TEARDOWN; | |
535 | ||
536 | skb_put(skb, sizeof(tf->u.teardown)); | |
537 | tf->u.teardown.reason_code = cpu_to_le16(status_code); | |
538 | break; | |
539 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
540 | tf->category = WLAN_CATEGORY_TDLS; | |
541 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; | |
542 | ||
543 | skb_put(skb, sizeof(tf->u.discover_req)); | |
544 | tf->u.discover_req.dialog_token = dialog_token; | |
545 | break; | |
546 | default: | |
547 | return -EINVAL; | |
548 | } | |
549 | ||
550 | return 0; | |
551 | } | |
552 | ||
553 | static int | |
554 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 555 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
556 | u16 status_code, struct sk_buff *skb) |
557 | { | |
558 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
559 | struct ieee80211_mgmt *mgmt; |
560 | ||
561 | mgmt = (void *)skb_put(skb, 24); | |
562 | memset(mgmt, 0, 24); | |
563 | memcpy(mgmt->da, peer, ETH_ALEN); | |
564 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
565 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
566 | ||
567 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
568 | IEEE80211_STYPE_ACTION); | |
569 | ||
570 | switch (action_code) { | |
571 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
572 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); | |
573 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; | |
574 | mgmt->u.action.u.tdls_discover_resp.action_code = | |
575 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; | |
576 | mgmt->u.action.u.tdls_discover_resp.dialog_token = | |
577 | dialog_token; | |
578 | mgmt->u.action.u.tdls_discover_resp.capability = | |
dd8c0b03 AN |
579 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
580 | status_code)); | |
95224fe8 AN |
581 | break; |
582 | default: | |
583 | return -EINVAL; | |
584 | } | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
17e6a59a AN |
589 | static int |
590 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, | |
591 | const u8 *peer, u8 action_code, | |
592 | u8 dialog_token, u16 status_code, | |
2fb6b9b8 AN |
593 | u32 peer_capability, bool initiator, |
594 | const u8 *extra_ies, size_t extra_ies_len) | |
95224fe8 AN |
595 | { |
596 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
597 | struct ieee80211_local *local = sdata->local; | |
598 | struct sk_buff *skb = NULL; | |
1277b4a9 | 599 | u32 flags = 0; |
95224fe8 | 600 | bool send_direct; |
626911cc | 601 | struct sta_info *sta; |
95224fe8 AN |
602 | int ret; |
603 | ||
1277b4a9 LK |
604 | skb = netdev_alloc_skb(dev, |
605 | local->hw.extra_tx_headroom + | |
606 | max(sizeof(struct ieee80211_mgmt), | |
607 | sizeof(struct ieee80211_tdls_data)) + | |
608 | 50 + /* supported rates */ | |
609 | 7 + /* ext capab */ | |
610 | 26 + /* max(WMM-info, WMM-param) */ | |
611 | 2 + max(sizeof(struct ieee80211_ht_cap), | |
612 | sizeof(struct ieee80211_ht_operation)) + | |
f0d29cb9 | 613 | 50 + /* supported channels */ |
2cedd879 | 614 | 3 + /* 40/20 BSS coex */ |
1277b4a9 LK |
615 | extra_ies_len + |
616 | sizeof(struct ieee80211_tdls_lnkie)); | |
95224fe8 AN |
617 | if (!skb) |
618 | return -ENOMEM; | |
619 | ||
620 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
621 | ||
622 | switch (action_code) { | |
623 | case WLAN_TDLS_SETUP_REQUEST: | |
624 | case WLAN_TDLS_SETUP_RESPONSE: | |
625 | case WLAN_TDLS_SETUP_CONFIRM: | |
626 | case WLAN_TDLS_TEARDOWN: | |
627 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
628 | ret = ieee80211_prep_tdls_encap_data(wiphy, dev, peer, | |
629 | action_code, dialog_token, | |
630 | status_code, skb); | |
631 | send_direct = false; | |
632 | break; | |
633 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
634 | ret = ieee80211_prep_tdls_direct(wiphy, dev, peer, action_code, | |
635 | dialog_token, status_code, | |
636 | skb); | |
637 | send_direct = true; | |
638 | break; | |
639 | default: | |
640 | ret = -ENOTSUPP; | |
641 | break; | |
642 | } | |
643 | ||
644 | if (ret < 0) | |
645 | goto fail; | |
646 | ||
626911cc AN |
647 | rcu_read_lock(); |
648 | sta = sta_info_get(sdata, peer); | |
649 | ||
650 | /* infer the initiator if we can, to support old userspace */ | |
95224fe8 AN |
651 | switch (action_code) { |
652 | case WLAN_TDLS_SETUP_REQUEST: | |
8b94148c | 653 | if (sta) { |
626911cc | 654 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
655 | sta->sta.tdls_initiator = false; |
656 | } | |
626911cc | 657 | /* fall-through */ |
95224fe8 | 658 | case WLAN_TDLS_SETUP_CONFIRM: |
95224fe8 | 659 | case WLAN_TDLS_DISCOVERY_REQUEST: |
626911cc | 660 | initiator = true; |
95224fe8 AN |
661 | break; |
662 | case WLAN_TDLS_SETUP_RESPONSE: | |
626911cc AN |
663 | /* |
664 | * In some testing scenarios, we send a request and response. | |
665 | * Make the last packet sent take effect for the initiator | |
666 | * value. | |
667 | */ | |
8b94148c | 668 | if (sta) { |
626911cc | 669 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
670 | sta->sta.tdls_initiator = true; |
671 | } | |
626911cc | 672 | /* fall-through */ |
95224fe8 | 673 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
626911cc | 674 | initiator = false; |
2fb6b9b8 AN |
675 | break; |
676 | case WLAN_TDLS_TEARDOWN: | |
677 | /* any value is ok */ | |
95224fe8 AN |
678 | break; |
679 | default: | |
680 | ret = -ENOTSUPP; | |
626911cc | 681 | break; |
95224fe8 AN |
682 | } |
683 | ||
46792a2d AN |
684 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
685 | initiator = true; | |
2fb6b9b8 | 686 | |
626911cc AN |
687 | rcu_read_unlock(); |
688 | if (ret < 0) | |
689 | goto fail; | |
690 | ||
1606ef4a AN |
691 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
692 | initiator, extra_ies, extra_ies_len); | |
95224fe8 AN |
693 | if (send_direct) { |
694 | ieee80211_tx_skb(sdata, skb); | |
695 | return 0; | |
696 | } | |
697 | ||
698 | /* | |
699 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise | |
700 | * we should default to AC_VI. | |
701 | */ | |
702 | switch (action_code) { | |
703 | case WLAN_TDLS_SETUP_REQUEST: | |
704 | case WLAN_TDLS_SETUP_RESPONSE: | |
705 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); | |
706 | skb->priority = 2; | |
707 | break; | |
708 | default: | |
709 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); | |
710 | skb->priority = 5; | |
711 | break; | |
712 | } | |
713 | ||
1277b4a9 LK |
714 | /* |
715 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. | |
716 | * Later, if no ACK is returned from peer, we will re-send the teardown | |
717 | * packet through the AP. | |
718 | */ | |
719 | if ((action_code == WLAN_TDLS_TEARDOWN) && | |
720 | (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) { | |
721 | struct sta_info *sta = NULL; | |
722 | bool try_resend; /* Should we keep skb for possible resend */ | |
723 | ||
724 | /* If not sending directly to peer - no point in keeping skb */ | |
725 | rcu_read_lock(); | |
726 | sta = sta_info_get(sdata, peer); | |
727 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
728 | rcu_read_unlock(); | |
729 | ||
730 | spin_lock_bh(&sdata->u.mgd.teardown_lock); | |
731 | if (try_resend && !sdata->u.mgd.teardown_skb) { | |
732 | /* Mark it as requiring TX status callback */ | |
733 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
734 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
735 | ||
736 | /* | |
737 | * skb is copied since mac80211 will later set | |
738 | * properties that might not be the same as the AP, | |
739 | * such as encryption, QoS, addresses, etc. | |
740 | * | |
741 | * No problem if skb_copy() fails, so no need to check. | |
742 | */ | |
743 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); | |
744 | sdata->u.mgd.orig_teardown_skb = skb; | |
745 | } | |
746 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); | |
747 | } | |
748 | ||
95224fe8 AN |
749 | /* disable bottom halves when entering the Tx path */ |
750 | local_bh_disable(); | |
1277b4a9 | 751 | __ieee80211_subif_start_xmit(skb, dev, flags); |
95224fe8 AN |
752 | local_bh_enable(); |
753 | ||
754 | return ret; | |
755 | ||
756 | fail: | |
757 | dev_kfree_skb(skb); | |
758 | return ret; | |
759 | } | |
760 | ||
191dd469 AN |
761 | static int |
762 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, | |
763 | const u8 *peer, u8 action_code, u8 dialog_token, | |
764 | u16 status_code, u32 peer_capability, bool initiator, | |
765 | const u8 *extra_ies, size_t extra_ies_len) | |
17e6a59a AN |
766 | { |
767 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
768 | struct ieee80211_local *local = sdata->local; | |
769 | int ret; | |
770 | ||
17e6a59a AN |
771 | mutex_lock(&local->mtx); |
772 | ||
773 | /* we don't support concurrent TDLS peer setups */ | |
81dd2b88 AN |
774 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
775 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { | |
17e6a59a AN |
776 | ret = -EBUSY; |
777 | goto exit; | |
778 | } | |
779 | ||
7adc3e46 AN |
780 | /* |
781 | * make sure we have a STA representing the peer so we drop or buffer | |
782 | * non-TDLS-setup frames to the peer. We can't send other packets | |
6ae32e5d AN |
783 | * during setup through the AP path. |
784 | * Allow error packets to be sent - sometimes we don't even add a STA | |
785 | * before failing the setup. | |
7adc3e46 | 786 | */ |
6ae32e5d AN |
787 | if (status_code == 0) { |
788 | rcu_read_lock(); | |
789 | if (!sta_info_get(sdata, peer)) { | |
790 | rcu_read_unlock(); | |
791 | ret = -ENOLINK; | |
792 | goto exit; | |
793 | } | |
7adc3e46 | 794 | rcu_read_unlock(); |
7adc3e46 | 795 | } |
7adc3e46 | 796 | |
db67d661 AN |
797 | ieee80211_flush_queues(local, sdata); |
798 | ||
17e6a59a AN |
799 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
800 | dialog_token, status_code, | |
2fb6b9b8 AN |
801 | peer_capability, initiator, |
802 | extra_ies, extra_ies_len); | |
17e6a59a AN |
803 | if (ret < 0) |
804 | goto exit; | |
805 | ||
81dd2b88 | 806 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
191dd469 | 807 | ieee80211_queue_delayed_work(&sdata->local->hw, |
81dd2b88 | 808 | &sdata->u.mgd.tdls_peer_del_work, |
191dd469 | 809 | TDLS_PEER_SETUP_TIMEOUT); |
17e6a59a AN |
810 | |
811 | exit: | |
812 | mutex_unlock(&local->mtx); | |
191dd469 AN |
813 | return ret; |
814 | } | |
815 | ||
db67d661 AN |
816 | static int |
817 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, | |
818 | const u8 *peer, u8 action_code, u8 dialog_token, | |
819 | u16 status_code, u32 peer_capability, | |
820 | bool initiator, const u8 *extra_ies, | |
821 | size_t extra_ies_len) | |
822 | { | |
823 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
824 | struct ieee80211_local *local = sdata->local; | |
825 | struct sta_info *sta; | |
826 | int ret; | |
827 | ||
828 | /* | |
829 | * No packets can be transmitted to the peer via the AP during setup - | |
830 | * the STA is set as a TDLS peer, but is not authorized. | |
831 | * During teardown, we prevent direct transmissions by stopping the | |
832 | * queues and flushing all direct packets. | |
833 | */ | |
834 | ieee80211_stop_vif_queues(local, sdata, | |
835 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
836 | ieee80211_flush_queues(local, sdata); | |
837 | ||
838 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, | |
839 | dialog_token, status_code, | |
840 | peer_capability, initiator, | |
841 | extra_ies, extra_ies_len); | |
842 | if (ret < 0) | |
843 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", | |
844 | ret); | |
845 | ||
846 | /* | |
847 | * Remove the STA AUTH flag to force further traffic through the AP. If | |
848 | * the STA was unreachable, it was already removed. | |
849 | */ | |
850 | rcu_read_lock(); | |
851 | sta = sta_info_get(sdata, peer); | |
852 | if (sta) | |
853 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
854 | rcu_read_unlock(); | |
855 | ||
856 | ieee80211_wake_vif_queues(local, sdata, | |
857 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
858 | ||
859 | return 0; | |
860 | } | |
861 | ||
191dd469 AN |
862 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
863 | const u8 *peer, u8 action_code, u8 dialog_token, | |
864 | u16 status_code, u32 peer_capability, | |
865 | bool initiator, const u8 *extra_ies, | |
866 | size_t extra_ies_len) | |
867 | { | |
868 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
869 | int ret; | |
870 | ||
871 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
872 | return -ENOTSUPP; | |
873 | ||
874 | /* make sure we are in managed mode, and associated */ | |
875 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
876 | !sdata->u.mgd.associated) | |
877 | return -EINVAL; | |
878 | ||
879 | switch (action_code) { | |
880 | case WLAN_TDLS_SETUP_REQUEST: | |
881 | case WLAN_TDLS_SETUP_RESPONSE: | |
882 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, | |
883 | dialog_token, status_code, | |
884 | peer_capability, initiator, | |
885 | extra_ies, extra_ies_len); | |
886 | break; | |
887 | case WLAN_TDLS_TEARDOWN: | |
db67d661 AN |
888 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
889 | action_code, dialog_token, | |
890 | status_code, | |
891 | peer_capability, initiator, | |
892 | extra_ies, extra_ies_len); | |
893 | break; | |
191dd469 | 894 | case WLAN_TDLS_DISCOVERY_REQUEST: |
ee10f2c7 AN |
895 | /* |
896 | * Protect the discovery so we can hear the TDLS discovery | |
897 | * response frame. It is transmitted directly and not buffered | |
898 | * by the AP. | |
899 | */ | |
900 | drv_mgd_protect_tdls_discover(sdata->local, sdata); | |
901 | /* fall-through */ | |
902 | case WLAN_TDLS_SETUP_CONFIRM: | |
191dd469 AN |
903 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
904 | /* no special handling */ | |
905 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, | |
906 | action_code, | |
907 | dialog_token, | |
908 | status_code, | |
909 | peer_capability, | |
910 | initiator, extra_ies, | |
911 | extra_ies_len); | |
912 | break; | |
913 | default: | |
914 | ret = -EOPNOTSUPP; | |
915 | break; | |
916 | } | |
17e6a59a AN |
917 | |
918 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", | |
919 | action_code, peer, ret); | |
920 | return ret; | |
921 | } | |
922 | ||
95224fe8 | 923 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
3b3a0162 | 924 | const u8 *peer, enum nl80211_tdls_operation oper) |
95224fe8 AN |
925 | { |
926 | struct sta_info *sta; | |
927 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
17e6a59a AN |
928 | struct ieee80211_local *local = sdata->local; |
929 | int ret; | |
95224fe8 AN |
930 | |
931 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
932 | return -ENOTSUPP; | |
933 | ||
934 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
935 | return -EINVAL; | |
936 | ||
17e6a59a AN |
937 | switch (oper) { |
938 | case NL80211_TDLS_ENABLE_LINK: | |
939 | case NL80211_TDLS_DISABLE_LINK: | |
940 | break; | |
941 | case NL80211_TDLS_TEARDOWN: | |
942 | case NL80211_TDLS_SETUP: | |
943 | case NL80211_TDLS_DISCOVERY_REQ: | |
944 | /* We don't support in-driver setup/teardown/discovery */ | |
945 | return -ENOTSUPP; | |
946 | } | |
947 | ||
948 | mutex_lock(&local->mtx); | |
95224fe8 AN |
949 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
950 | ||
951 | switch (oper) { | |
952 | case NL80211_TDLS_ENABLE_LINK: | |
953 | rcu_read_lock(); | |
954 | sta = sta_info_get(sdata, peer); | |
955 | if (!sta) { | |
956 | rcu_read_unlock(); | |
17e6a59a AN |
957 | ret = -ENOLINK; |
958 | break; | |
95224fe8 AN |
959 | } |
960 | ||
961 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
962 | rcu_read_unlock(); | |
17e6a59a | 963 | |
81dd2b88 AN |
964 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
965 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); | |
17e6a59a | 966 | ret = 0; |
95224fe8 AN |
967 | break; |
968 | case NL80211_TDLS_DISABLE_LINK: | |
bb3f8486 LK |
969 | /* |
970 | * The teardown message in ieee80211_tdls_mgmt_teardown() was | |
971 | * created while the queues were stopped, so it might still be | |
972 | * pending. Before flushing the queues we need to be sure the | |
973 | * message is handled by the tasklet handling pending messages, | |
974 | * otherwise we might start destroying the station before | |
975 | * sending the teardown packet. | |
976 | * Note that this only forces the tasklet to flush pendings - | |
977 | * not to stop the tasklet from rescheduling itself. | |
978 | */ | |
979 | tasklet_kill(&local->tx_pending_tasklet); | |
db67d661 AN |
980 | /* flush a potentially queued teardown packet */ |
981 | ieee80211_flush_queues(local, sdata); | |
982 | ||
17e6a59a AN |
983 | ret = sta_info_destroy_addr(sdata, peer); |
984 | break; | |
95224fe8 | 985 | default: |
17e6a59a AN |
986 | ret = -ENOTSUPP; |
987 | break; | |
95224fe8 AN |
988 | } |
989 | ||
81dd2b88 AN |
990 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
991 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); | |
992 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
993 | } |
994 | ||
995 | mutex_unlock(&local->mtx); | |
996 | return ret; | |
95224fe8 | 997 | } |
c887f0d3 AN |
998 | |
999 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, | |
1000 | enum nl80211_tdls_operation oper, | |
1001 | u16 reason_code, gfp_t gfp) | |
1002 | { | |
1003 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1004 | ||
1005 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { | |
1006 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", | |
1007 | oper); | |
1008 | return; | |
1009 | } | |
1010 | ||
1011 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); | |
1012 | } | |
1013 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); |