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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 |
d51c2ea3 | 7 | * Copyright 2015 Intel Deutschland GmbH |
95224fe8 AN |
8 | * |
9 | * This file is GPLv2 as found in COPYING. | |
10 | */ | |
11 | ||
12 | #include <linux/ieee80211.h> | |
6f7eaa47 | 13 | #include <linux/log2.h> |
c887f0d3 | 14 | #include <net/cfg80211.h> |
c8ff71e6 | 15 | #include <linux/rtnetlink.h> |
95224fe8 | 16 | #include "ieee80211_i.h" |
ee10f2c7 | 17 | #include "driver-ops.h" |
95224fe8 | 18 | |
17e6a59a AN |
19 | /* give usermode some time for retries in setting up the TDLS session */ |
20 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) | |
21 | ||
22 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) | |
23 | { | |
24 | struct ieee80211_sub_if_data *sdata; | |
25 | struct ieee80211_local *local; | |
26 | ||
27 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
81dd2b88 | 28 | u.mgd.tdls_peer_del_work.work); |
17e6a59a AN |
29 | local = sdata->local; |
30 | ||
31 | mutex_lock(&local->mtx); | |
81dd2b88 AN |
32 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
33 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); | |
34 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); | |
35 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
36 | } |
37 | mutex_unlock(&local->mtx); | |
38 | } | |
39 | ||
b98fb44f | 40 | static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, |
78632a17 | 41 | struct sk_buff *skb) |
95224fe8 | 42 | { |
b98fb44f | 43 | struct ieee80211_local *local = sdata->local; |
78632a17 AN |
44 | bool chan_switch = local->hw.wiphy->features & |
45 | NL80211_FEATURE_TDLS_CHANNEL_SWITCH; | |
b98fb44f AN |
46 | bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW); |
47 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
48 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; | |
49 | bool vht = sband && sband->vht_cap.vht_supported; | |
50 | u8 *pos = (void *)skb_put(skb, 10); | |
95224fe8 AN |
51 | |
52 | *pos++ = WLAN_EID_EXT_CAPABILITY; | |
b98fb44f | 53 | *pos++ = 8; /* len */ |
95224fe8 AN |
54 | *pos++ = 0x0; |
55 | *pos++ = 0x0; | |
56 | *pos++ = 0x0; | |
78632a17 | 57 | *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0; |
95224fe8 | 58 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
b98fb44f AN |
59 | *pos++ = 0; |
60 | *pos++ = 0; | |
61 | *pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0; | |
95224fe8 AN |
62 | } |
63 | ||
f0d29cb9 AN |
64 | static u8 |
65 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, | |
66 | struct sk_buff *skb, u16 start, u16 end, | |
67 | u16 spacing) | |
68 | { | |
69 | u8 subband_cnt = 0, ch_cnt = 0; | |
70 | struct ieee80211_channel *ch; | |
71 | struct cfg80211_chan_def chandef; | |
72 | int i, subband_start; | |
923b352f | 73 | struct wiphy *wiphy = sdata->local->hw.wiphy; |
f0d29cb9 AN |
74 | |
75 | for (i = start; i <= end; i += spacing) { | |
76 | if (!ch_cnt) | |
77 | subband_start = i; | |
78 | ||
79 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); | |
80 | if (ch) { | |
81 | /* we will be active on the channel */ | |
f0d29cb9 | 82 | cfg80211_chandef_create(&chandef, ch, |
50075892 | 83 | NL80211_CHAN_NO_HT); |
923b352f AN |
84 | if (cfg80211_reg_can_beacon_relax(wiphy, &chandef, |
85 | sdata->wdev.iftype)) { | |
f0d29cb9 | 86 | ch_cnt++; |
50075892 AN |
87 | /* |
88 | * check if the next channel is also part of | |
89 | * this allowed range | |
90 | */ | |
f0d29cb9 AN |
91 | continue; |
92 | } | |
93 | } | |
94 | ||
50075892 AN |
95 | /* |
96 | * we've reached the end of a range, with allowed channels | |
97 | * found | |
98 | */ | |
f0d29cb9 AN |
99 | if (ch_cnt) { |
100 | u8 *pos = skb_put(skb, 2); | |
101 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
102 | *pos++ = ch_cnt; | |
103 | ||
104 | subband_cnt++; | |
105 | ch_cnt = 0; | |
106 | } | |
107 | } | |
108 | ||
50075892 AN |
109 | /* all channels in the requested range are allowed - add them here */ |
110 | if (ch_cnt) { | |
111 | u8 *pos = skb_put(skb, 2); | |
112 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
113 | *pos++ = ch_cnt; | |
114 | ||
115 | subband_cnt++; | |
116 | } | |
117 | ||
f0d29cb9 AN |
118 | return subband_cnt; |
119 | } | |
120 | ||
121 | static void | |
122 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, | |
123 | struct sk_buff *skb) | |
124 | { | |
125 | /* | |
126 | * Add possible channels for TDLS. These are channels that are allowed | |
127 | * to be active. | |
128 | */ | |
129 | u8 subband_cnt; | |
130 | u8 *pos = skb_put(skb, 2); | |
131 | ||
132 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
133 | ||
134 | /* | |
135 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as | |
136 | * this doesn't happen in real world scenarios. | |
137 | */ | |
138 | ||
139 | /* 2GHz, with 5MHz spacing */ | |
140 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); | |
141 | ||
142 | /* 5GHz, with 20MHz spacing */ | |
143 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); | |
144 | ||
145 | /* length */ | |
146 | *pos = 2 * subband_cnt; | |
147 | } | |
148 | ||
a38700dd AN |
149 | static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, |
150 | struct sk_buff *skb) | |
151 | { | |
152 | u8 *pos; | |
153 | u8 op_class; | |
154 | ||
155 | if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef, | |
156 | &op_class)) | |
157 | return; | |
158 | ||
159 | pos = skb_put(skb, 4); | |
160 | *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES; | |
161 | *pos++ = 2; /* len */ | |
162 | ||
163 | *pos++ = op_class; | |
164 | *pos++ = op_class; /* give current operating class as alternate too */ | |
165 | } | |
166 | ||
2cedd879 AN |
167 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
168 | { | |
169 | u8 *pos = (void *)skb_put(skb, 3); | |
170 | ||
171 | *pos++ = WLAN_EID_BSS_COEX_2040; | |
172 | *pos++ = 1; /* len */ | |
173 | ||
174 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; | |
175 | } | |
176 | ||
dd8c0b03 AN |
177 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
178 | u16 status_code) | |
95224fe8 | 179 | { |
dd8c0b03 AN |
180 | /* The capability will be 0 when sending a failure code */ |
181 | if (status_code != 0) | |
182 | return 0; | |
183 | ||
ea1b2b45 JB |
184 | if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_2GHZ) { |
185 | return WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
186 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
187 | } | |
95224fe8 | 188 | |
ea1b2b45 | 189 | return 0; |
95224fe8 AN |
190 | } |
191 | ||
1606ef4a AN |
192 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
193 | struct sk_buff *skb, const u8 *peer, | |
194 | bool initiator) | |
95224fe8 AN |
195 | { |
196 | struct ieee80211_tdls_lnkie *lnkid; | |
1606ef4a AN |
197 | const u8 *init_addr, *rsp_addr; |
198 | ||
199 | if (initiator) { | |
200 | init_addr = sdata->vif.addr; | |
201 | rsp_addr = peer; | |
202 | } else { | |
203 | init_addr = peer; | |
204 | rsp_addr = sdata->vif.addr; | |
205 | } | |
95224fe8 AN |
206 | |
207 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); | |
208 | ||
209 | lnkid->ie_type = WLAN_EID_LINK_ID; | |
210 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; | |
211 | ||
1606ef4a AN |
212 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
213 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); | |
214 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); | |
95224fe8 AN |
215 | } |
216 | ||
fb28ec0c AN |
217 | static void |
218 | ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) | |
219 | { | |
220 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
221 | u8 *pos = (void *)skb_put(skb, 4); | |
222 | ||
223 | *pos++ = WLAN_EID_AID; | |
224 | *pos++ = 2; /* len */ | |
225 | put_unaligned_le16(ifmgd->aid, pos); | |
226 | } | |
227 | ||
6f7eaa47 AN |
228 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
229 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) | |
230 | { | |
231 | switch (ac) { | |
232 | default: | |
233 | WARN_ON_ONCE(1); | |
234 | case 0: | |
235 | return IEEE80211_AC_BE; | |
236 | case 1: | |
237 | return IEEE80211_AC_BK; | |
238 | case 2: | |
239 | return IEEE80211_AC_VI; | |
240 | case 3: | |
241 | return IEEE80211_AC_VO; | |
242 | } | |
243 | } | |
244 | ||
245 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) | |
246 | { | |
247 | u8 ret; | |
248 | ||
249 | ret = aifsn & 0x0f; | |
250 | if (acm) | |
251 | ret |= 0x10; | |
252 | ret |= (aci << 5) & 0x60; | |
253 | return ret; | |
254 | } | |
255 | ||
256 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) | |
257 | { | |
258 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | | |
259 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); | |
260 | } | |
261 | ||
262 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, | |
263 | struct sk_buff *skb) | |
264 | { | |
265 | struct ieee80211_wmm_param_ie *wmm; | |
266 | struct ieee80211_tx_queue_params *txq; | |
267 | int i; | |
268 | ||
269 | wmm = (void *)skb_put(skb, sizeof(*wmm)); | |
270 | memset(wmm, 0, sizeof(*wmm)); | |
271 | ||
272 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; | |
273 | wmm->len = sizeof(*wmm) - 2; | |
274 | ||
275 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ | |
276 | wmm->oui[1] = 0x50; | |
277 | wmm->oui[2] = 0xf2; | |
278 | wmm->oui_type = 2; /* WME */ | |
279 | wmm->oui_subtype = 1; /* WME param */ | |
280 | wmm->version = 1; /* WME ver */ | |
281 | wmm->qos_info = 0; /* U-APSD not in use */ | |
282 | ||
283 | /* | |
284 | * Use the EDCA parameters defined for the BSS, or default if the AP | |
285 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 | |
286 | */ | |
287 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
288 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; | |
289 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, | |
290 | txq->acm, i); | |
291 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); | |
292 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); | |
293 | } | |
294 | } | |
295 | ||
0fabfaaf AN |
296 | static void |
297 | ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata, | |
298 | struct sta_info *sta) | |
299 | { | |
300 | /* IEEE802.11ac-2013 Table E-4 */ | |
301 | u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 }; | |
302 | struct cfg80211_chan_def uc = sta->tdls_chandef; | |
303 | enum nl80211_chan_width max_width = ieee80211_get_sta_bw(&sta->sta); | |
304 | int i; | |
305 | ||
306 | /* only support upgrading non-narrow channels up to 80Mhz */ | |
307 | if (max_width == NL80211_CHAN_WIDTH_5 || | |
308 | max_width == NL80211_CHAN_WIDTH_10) | |
309 | return; | |
310 | ||
311 | if (max_width > NL80211_CHAN_WIDTH_80) | |
312 | max_width = NL80211_CHAN_WIDTH_80; | |
313 | ||
314 | if (uc.width == max_width) | |
315 | return; | |
316 | /* | |
317 | * Channel usage constrains in the IEEE802.11ac-2013 specification only | |
318 | * allow expanding a 20MHz channel to 80MHz in a single way. In | |
319 | * addition, there are no 40MHz allowed channels that are not part of | |
320 | * the allowed 80MHz range in the 5GHz spectrum (the relevant one here). | |
321 | */ | |
322 | for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++) | |
323 | if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) { | |
324 | uc.center_freq1 = centers_80mhz[i]; | |
325 | uc.width = NL80211_CHAN_WIDTH_80; | |
326 | break; | |
327 | } | |
328 | ||
329 | if (!uc.center_freq1) | |
330 | return; | |
331 | ||
332 | /* proceed to downgrade the chandef until usable or the same */ | |
333 | while (uc.width > max_width && | |
334 | !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, | |
335 | &uc, sdata->wdev.iftype)) | |
336 | ieee80211_chandef_downgrade(&uc); | |
337 | ||
338 | if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) { | |
339 | tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n", | |
340 | sta->tdls_chandef.width, uc.width); | |
341 | ||
342 | /* | |
343 | * the station is not yet authorized when BW upgrade is done, | |
344 | * locking is not required | |
345 | */ | |
346 | sta->tdls_chandef = uc; | |
347 | } | |
348 | } | |
349 | ||
f09a87d2 AN |
350 | static void |
351 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, | |
352 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
353 | u8 action_code, bool initiator, |
354 | const u8 *extra_ies, size_t extra_ies_len) | |
f09a87d2 AN |
355 | { |
356 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
40b861a0 | 357 | struct ieee80211_local *local = sdata->local; |
13cc8a4a AN |
358 | struct ieee80211_supported_band *sband; |
359 | struct ieee80211_sta_ht_cap ht_cap; | |
fb28ec0c | 360 | struct ieee80211_sta_vht_cap vht_cap; |
13cc8a4a | 361 | struct sta_info *sta = NULL; |
f09a87d2 AN |
362 | size_t offset = 0, noffset; |
363 | u8 *pos; | |
364 | ||
365 | ieee80211_add_srates_ie(sdata, skb, false, band); | |
366 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); | |
f0d29cb9 | 367 | ieee80211_tdls_add_supp_channels(sdata, skb); |
f09a87d2 AN |
368 | |
369 | /* add any custom IEs that go before Extended Capabilities */ | |
370 | if (extra_ies_len) { | |
371 | static const u8 before_ext_cap[] = { | |
372 | WLAN_EID_SUPP_RATES, | |
373 | WLAN_EID_COUNTRY, | |
374 | WLAN_EID_EXT_SUPP_RATES, | |
375 | WLAN_EID_SUPPORTED_CHANNELS, | |
376 | WLAN_EID_RSN, | |
377 | }; | |
378 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
379 | before_ext_cap, | |
380 | ARRAY_SIZE(before_ext_cap), | |
381 | offset); | |
382 | pos = skb_put(skb, noffset - offset); | |
383 | memcpy(pos, extra_ies + offset, noffset - offset); | |
384 | offset = noffset; | |
385 | } | |
386 | ||
b98fb44f | 387 | ieee80211_tdls_add_ext_capab(sdata, skb); |
f09a87d2 | 388 | |
40b861a0 AN |
389 | /* add the QoS element if we support it */ |
390 | if (local->hw.queues >= IEEE80211_NUM_ACS && | |
391 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) | |
392 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ | |
393 | ||
f09a87d2 AN |
394 | /* add any custom IEs that go before HT capabilities */ |
395 | if (extra_ies_len) { | |
396 | static const u8 before_ht_cap[] = { | |
397 | WLAN_EID_SUPP_RATES, | |
398 | WLAN_EID_COUNTRY, | |
399 | WLAN_EID_EXT_SUPP_RATES, | |
400 | WLAN_EID_SUPPORTED_CHANNELS, | |
401 | WLAN_EID_RSN, | |
402 | WLAN_EID_EXT_CAPABILITY, | |
403 | WLAN_EID_QOS_CAPA, | |
404 | WLAN_EID_FAST_BSS_TRANSITION, | |
405 | WLAN_EID_TIMEOUT_INTERVAL, | |
406 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
407 | }; | |
408 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
409 | before_ht_cap, | |
410 | ARRAY_SIZE(before_ht_cap), | |
411 | offset); | |
412 | pos = skb_put(skb, noffset - offset); | |
413 | memcpy(pos, extra_ies + offset, noffset - offset); | |
414 | offset = noffset; | |
415 | } | |
416 | ||
0fabfaaf | 417 | mutex_lock(&local->sta_mtx); |
ae2e9fba AN |
418 | |
419 | /* we should have the peer STA if we're already responding */ | |
420 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { | |
421 | sta = sta_info_get(sdata, peer); | |
422 | if (WARN_ON_ONCE(!sta)) { | |
0fabfaaf | 423 | mutex_unlock(&local->sta_mtx); |
ae2e9fba AN |
424 | return; |
425 | } | |
0fabfaaf AN |
426 | |
427 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; | |
ae2e9fba AN |
428 | } |
429 | ||
a38700dd AN |
430 | ieee80211_tdls_add_oper_classes(sdata, skb); |
431 | ||
13cc8a4a AN |
432 | /* |
433 | * with TDLS we can switch channels, and HT-caps are not necessarily | |
434 | * the same on all bands. The specification limits the setup to a | |
435 | * single HT-cap, so use the current band for now. | |
436 | */ | |
437 | sband = local->hw.wiphy->bands[band]; | |
438 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
c5309ba7 | 439 | |
070e176a AN |
440 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
441 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
442 | ht_cap.ht_supported) { | |
c5309ba7 JB |
443 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
444 | ||
445 | /* disable SMPS in TDLS initiator */ | |
446 | ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED | |
447 | << IEEE80211_HT_CAP_SM_PS_SHIFT; | |
448 | ||
449 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
450 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
451 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
452 | ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
c5309ba7 JB |
453 | /* the peer caps are already intersected with our own */ |
454 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); | |
13cc8a4a AN |
455 | |
456 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
457 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
458 | } | |
459 | ||
2cedd879 AN |
460 | if (ht_cap.ht_supported && |
461 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
462 | ieee80211_tdls_add_bss_coex_ie(skb); | |
463 | ||
fb28ec0c AN |
464 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
465 | ||
466 | /* add any custom IEs that go before VHT capabilities */ | |
467 | if (extra_ies_len) { | |
468 | static const u8 before_vht_cap[] = { | |
469 | WLAN_EID_SUPP_RATES, | |
470 | WLAN_EID_COUNTRY, | |
471 | WLAN_EID_EXT_SUPP_RATES, | |
472 | WLAN_EID_SUPPORTED_CHANNELS, | |
473 | WLAN_EID_RSN, | |
474 | WLAN_EID_EXT_CAPABILITY, | |
475 | WLAN_EID_QOS_CAPA, | |
476 | WLAN_EID_FAST_BSS_TRANSITION, | |
477 | WLAN_EID_TIMEOUT_INTERVAL, | |
478 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
479 | WLAN_EID_MULTI_BAND, | |
480 | }; | |
481 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
482 | before_vht_cap, | |
483 | ARRAY_SIZE(before_vht_cap), | |
484 | offset); | |
485 | pos = skb_put(skb, noffset - offset); | |
486 | memcpy(pos, extra_ies + offset, noffset - offset); | |
487 | offset = noffset; | |
488 | } | |
489 | ||
490 | /* build the VHT-cap similarly to the HT-cap */ | |
491 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
070e176a AN |
492 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
493 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
494 | vht_cap.vht_supported) { | |
fb28ec0c AN |
495 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
496 | ||
497 | /* the AID is present only when VHT is implemented */ | |
070e176a AN |
498 | if (action_code == WLAN_TDLS_SETUP_REQUEST) |
499 | ieee80211_tdls_add_aid(sdata, skb); | |
fb28ec0c AN |
500 | |
501 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
502 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
503 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
504 | vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) { | |
505 | /* the peer caps are already intersected with our own */ | |
506 | memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap)); | |
507 | ||
508 | /* the AID is present only when VHT is implemented */ | |
509 | ieee80211_tdls_add_aid(sdata, skb); | |
510 | ||
511 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
512 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
0fabfaaf AN |
513 | |
514 | /* | |
515 | * if both peers support WIDER_BW, we can expand the chandef to | |
516 | * a wider compatible one, up to 80MHz | |
517 | */ | |
518 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
519 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
fb28ec0c AN |
520 | } |
521 | ||
0fabfaaf | 522 | mutex_unlock(&local->sta_mtx); |
fb28ec0c | 523 | |
f09a87d2 AN |
524 | /* add any remaining IEs */ |
525 | if (extra_ies_len) { | |
526 | noffset = extra_ies_len; | |
527 | pos = skb_put(skb, noffset - offset); | |
528 | memcpy(pos, extra_ies + offset, noffset - offset); | |
529 | } | |
1606ef4a | 530 | |
f09a87d2 AN |
531 | } |
532 | ||
6f7eaa47 AN |
533 | static void |
534 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, | |
535 | struct sk_buff *skb, const u8 *peer, | |
536 | bool initiator, const u8 *extra_ies, | |
537 | size_t extra_ies_len) | |
538 | { | |
539 | struct ieee80211_local *local = sdata->local; | |
13cc8a4a | 540 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6f7eaa47 | 541 | size_t offset = 0, noffset; |
13cc8a4a | 542 | struct sta_info *sta, *ap_sta; |
fb28ec0c | 543 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
6f7eaa47 AN |
544 | u8 *pos; |
545 | ||
0fabfaaf | 546 | mutex_lock(&local->sta_mtx); |
6f7eaa47 AN |
547 | |
548 | sta = sta_info_get(sdata, peer); | |
13cc8a4a AN |
549 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
550 | if (WARN_ON_ONCE(!sta || !ap_sta)) { | |
0fabfaaf | 551 | mutex_unlock(&local->sta_mtx); |
6f7eaa47 AN |
552 | return; |
553 | } | |
554 | ||
0fabfaaf AN |
555 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; |
556 | ||
6f7eaa47 AN |
557 | /* add any custom IEs that go before the QoS IE */ |
558 | if (extra_ies_len) { | |
559 | static const u8 before_qos[] = { | |
560 | WLAN_EID_RSN, | |
561 | }; | |
562 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
563 | before_qos, | |
564 | ARRAY_SIZE(before_qos), | |
565 | offset); | |
566 | pos = skb_put(skb, noffset - offset); | |
567 | memcpy(pos, extra_ies + offset, noffset - offset); | |
568 | offset = noffset; | |
569 | } | |
570 | ||
571 | /* add the QoS param IE if both the peer and we support it */ | |
a74a8c84 | 572 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
6f7eaa47 AN |
573 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
574 | ||
13cc8a4a AN |
575 | /* add any custom IEs that go before HT operation */ |
576 | if (extra_ies_len) { | |
577 | static const u8 before_ht_op[] = { | |
578 | WLAN_EID_RSN, | |
579 | WLAN_EID_QOS_CAPA, | |
580 | WLAN_EID_FAST_BSS_TRANSITION, | |
581 | WLAN_EID_TIMEOUT_INTERVAL, | |
582 | }; | |
583 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
584 | before_ht_op, | |
585 | ARRAY_SIZE(before_ht_op), | |
586 | offset); | |
587 | pos = skb_put(skb, noffset - offset); | |
588 | memcpy(pos, extra_ies + offset, noffset - offset); | |
589 | offset = noffset; | |
590 | } | |
591 | ||
592 | /* if HT support is only added in TDLS, we need an HT-operation IE */ | |
593 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
890b7878 AN |
594 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
595 | /* send an empty HT operation IE */ | |
596 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, | |
597 | &sdata->vif.bss_conf.chandef, 0); | |
13cc8a4a AN |
598 | } |
599 | ||
fb28ec0c AN |
600 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
601 | ||
602 | /* only include VHT-operation if not on the 2.4GHz band */ | |
890b7878 | 603 | if (band != IEEE80211_BAND_2GHZ && sta->sta.vht_cap.vht_supported) { |
0fabfaaf AN |
604 | /* |
605 | * if both peers support WIDER_BW, we can expand the chandef to | |
606 | * a wider compatible one, up to 80MHz | |
607 | */ | |
608 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
609 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
610 | ||
890b7878 AN |
611 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); |
612 | ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap, | |
0fabfaaf | 613 | &sta->tdls_chandef); |
fb28ec0c AN |
614 | } |
615 | ||
0fabfaaf | 616 | mutex_unlock(&local->sta_mtx); |
13cc8a4a | 617 | |
6f7eaa47 AN |
618 | /* add any remaining IEs */ |
619 | if (extra_ies_len) { | |
620 | noffset = extra_ies_len; | |
621 | pos = skb_put(skb, noffset - offset); | |
622 | memcpy(pos, extra_ies + offset, noffset - offset); | |
623 | } | |
6f7eaa47 AN |
624 | } |
625 | ||
a7a6bdd0 AN |
626 | static void |
627 | ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, | |
628 | struct sk_buff *skb, const u8 *peer, | |
629 | bool initiator, const u8 *extra_ies, | |
630 | size_t extra_ies_len, u8 oper_class, | |
631 | struct cfg80211_chan_def *chandef) | |
632 | { | |
633 | struct ieee80211_tdls_data *tf; | |
634 | size_t offset = 0, noffset; | |
635 | u8 *pos; | |
636 | ||
637 | if (WARN_ON_ONCE(!chandef)) | |
638 | return; | |
639 | ||
640 | tf = (void *)skb->data; | |
641 | tf->u.chan_switch_req.target_channel = | |
642 | ieee80211_frequency_to_channel(chandef->chan->center_freq); | |
643 | tf->u.chan_switch_req.oper_class = oper_class; | |
644 | ||
645 | if (extra_ies_len) { | |
646 | static const u8 before_lnkie[] = { | |
647 | WLAN_EID_SECONDARY_CHANNEL_OFFSET, | |
648 | }; | |
649 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
650 | before_lnkie, | |
651 | ARRAY_SIZE(before_lnkie), | |
652 | offset); | |
653 | pos = skb_put(skb, noffset - offset); | |
654 | memcpy(pos, extra_ies + offset, noffset - offset); | |
655 | offset = noffset; | |
656 | } | |
657 | ||
658 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
659 | ||
660 | /* add any remaining IEs */ | |
661 | if (extra_ies_len) { | |
662 | noffset = extra_ies_len; | |
663 | pos = skb_put(skb, noffset - offset); | |
664 | memcpy(pos, extra_ies + offset, noffset - offset); | |
665 | } | |
666 | } | |
667 | ||
8a4d32f3 AN |
668 | static void |
669 | ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, | |
670 | struct sk_buff *skb, const u8 *peer, | |
671 | u16 status_code, bool initiator, | |
672 | const u8 *extra_ies, | |
673 | size_t extra_ies_len) | |
674 | { | |
675 | if (status_code == 0) | |
676 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
677 | ||
678 | if (extra_ies_len) | |
679 | memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); | |
680 | } | |
681 | ||
46792a2d AN |
682 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
683 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
684 | u8 action_code, u16 status_code, |
685 | bool initiator, const u8 *extra_ies, | |
c2733905 AN |
686 | size_t extra_ies_len, u8 oper_class, |
687 | struct cfg80211_chan_def *chandef) | |
46792a2d | 688 | { |
46792a2d AN |
689 | switch (action_code) { |
690 | case WLAN_TDLS_SETUP_REQUEST: | |
691 | case WLAN_TDLS_SETUP_RESPONSE: | |
692 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
1606ef4a AN |
693 | if (status_code == 0) |
694 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, | |
695 | action_code, | |
696 | initiator, | |
697 | extra_ies, | |
698 | extra_ies_len); | |
46792a2d AN |
699 | break; |
700 | case WLAN_TDLS_SETUP_CONFIRM: | |
6f7eaa47 AN |
701 | if (status_code == 0) |
702 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, | |
703 | initiator, extra_ies, | |
704 | extra_ies_len); | |
705 | break; | |
46792a2d AN |
706 | case WLAN_TDLS_TEARDOWN: |
707 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
f09a87d2 AN |
708 | if (extra_ies_len) |
709 | memcpy(skb_put(skb, extra_ies_len), extra_ies, | |
710 | extra_ies_len); | |
1606ef4a AN |
711 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
712 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
46792a2d | 713 | break; |
a7a6bdd0 AN |
714 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
715 | ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer, | |
716 | initiator, extra_ies, | |
717 | extra_ies_len, | |
718 | oper_class, chandef); | |
719 | break; | |
8a4d32f3 AN |
720 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
721 | ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer, | |
722 | status_code, | |
723 | initiator, extra_ies, | |
724 | extra_ies_len); | |
725 | break; | |
46792a2d AN |
726 | } |
727 | ||
46792a2d AN |
728 | } |
729 | ||
95224fe8 AN |
730 | static int |
731 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 732 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
733 | u16 status_code, struct sk_buff *skb) |
734 | { | |
735 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
736 | struct ieee80211_tdls_data *tf; |
737 | ||
738 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); | |
739 | ||
740 | memcpy(tf->da, peer, ETH_ALEN); | |
741 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); | |
742 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); | |
743 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; | |
744 | ||
59cd85cb AN |
745 | /* network header is after the ethernet header */ |
746 | skb_set_network_header(skb, ETH_HLEN); | |
747 | ||
95224fe8 AN |
748 | switch (action_code) { |
749 | case WLAN_TDLS_SETUP_REQUEST: | |
750 | tf->category = WLAN_CATEGORY_TDLS; | |
751 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; | |
752 | ||
753 | skb_put(skb, sizeof(tf->u.setup_req)); | |
754 | tf->u.setup_req.dialog_token = dialog_token; | |
755 | tf->u.setup_req.capability = | |
dd8c0b03 AN |
756 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
757 | status_code)); | |
95224fe8 AN |
758 | break; |
759 | case WLAN_TDLS_SETUP_RESPONSE: | |
760 | tf->category = WLAN_CATEGORY_TDLS; | |
761 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; | |
762 | ||
763 | skb_put(skb, sizeof(tf->u.setup_resp)); | |
764 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); | |
765 | tf->u.setup_resp.dialog_token = dialog_token; | |
766 | tf->u.setup_resp.capability = | |
dd8c0b03 AN |
767 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
768 | status_code)); | |
95224fe8 AN |
769 | break; |
770 | case WLAN_TDLS_SETUP_CONFIRM: | |
771 | tf->category = WLAN_CATEGORY_TDLS; | |
772 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; | |
773 | ||
774 | skb_put(skb, sizeof(tf->u.setup_cfm)); | |
775 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); | |
776 | tf->u.setup_cfm.dialog_token = dialog_token; | |
777 | break; | |
778 | case WLAN_TDLS_TEARDOWN: | |
779 | tf->category = WLAN_CATEGORY_TDLS; | |
780 | tf->action_code = WLAN_TDLS_TEARDOWN; | |
781 | ||
782 | skb_put(skb, sizeof(tf->u.teardown)); | |
783 | tf->u.teardown.reason_code = cpu_to_le16(status_code); | |
784 | break; | |
785 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
786 | tf->category = WLAN_CATEGORY_TDLS; | |
787 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; | |
788 | ||
789 | skb_put(skb, sizeof(tf->u.discover_req)); | |
790 | tf->u.discover_req.dialog_token = dialog_token; | |
791 | break; | |
a7a6bdd0 AN |
792 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
793 | tf->category = WLAN_CATEGORY_TDLS; | |
794 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
795 | ||
796 | skb_put(skb, sizeof(tf->u.chan_switch_req)); | |
797 | break; | |
8a4d32f3 AN |
798 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
799 | tf->category = WLAN_CATEGORY_TDLS; | |
800 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
801 | ||
802 | skb_put(skb, sizeof(tf->u.chan_switch_resp)); | |
803 | tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code); | |
804 | break; | |
95224fe8 AN |
805 | default: |
806 | return -EINVAL; | |
807 | } | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static int | |
813 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 814 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
815 | u16 status_code, struct sk_buff *skb) |
816 | { | |
817 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
818 | struct ieee80211_mgmt *mgmt; |
819 | ||
820 | mgmt = (void *)skb_put(skb, 24); | |
821 | memset(mgmt, 0, 24); | |
822 | memcpy(mgmt->da, peer, ETH_ALEN); | |
823 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
824 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
825 | ||
826 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
827 | IEEE80211_STYPE_ACTION); | |
828 | ||
829 | switch (action_code) { | |
830 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
831 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); | |
832 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; | |
833 | mgmt->u.action.u.tdls_discover_resp.action_code = | |
834 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; | |
835 | mgmt->u.action.u.tdls_discover_resp.dialog_token = | |
836 | dialog_token; | |
837 | mgmt->u.action.u.tdls_discover_resp.capability = | |
dd8c0b03 AN |
838 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
839 | status_code)); | |
95224fe8 AN |
840 | break; |
841 | default: | |
842 | return -EINVAL; | |
843 | } | |
844 | ||
845 | return 0; | |
846 | } | |
847 | ||
c2733905 AN |
848 | static struct sk_buff * |
849 | ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata, | |
850 | const u8 *peer, u8 action_code, | |
851 | u8 dialog_token, u16 status_code, | |
852 | bool initiator, const u8 *extra_ies, | |
853 | size_t extra_ies_len, u8 oper_class, | |
854 | struct cfg80211_chan_def *chandef) | |
95224fe8 | 855 | { |
95224fe8 | 856 | struct ieee80211_local *local = sdata->local; |
c2733905 | 857 | struct sk_buff *skb; |
95224fe8 AN |
858 | int ret; |
859 | ||
c2733905 | 860 | skb = netdev_alloc_skb(sdata->dev, |
1277b4a9 LK |
861 | local->hw.extra_tx_headroom + |
862 | max(sizeof(struct ieee80211_mgmt), | |
863 | sizeof(struct ieee80211_tdls_data)) + | |
864 | 50 + /* supported rates */ | |
b98fb44f | 865 | 10 + /* ext capab */ |
1277b4a9 LK |
866 | 26 + /* max(WMM-info, WMM-param) */ |
867 | 2 + max(sizeof(struct ieee80211_ht_cap), | |
868 | sizeof(struct ieee80211_ht_operation)) + | |
fb28ec0c AN |
869 | 2 + max(sizeof(struct ieee80211_vht_cap), |
870 | sizeof(struct ieee80211_vht_operation)) + | |
f0d29cb9 | 871 | 50 + /* supported channels */ |
2cedd879 | 872 | 3 + /* 40/20 BSS coex */ |
fb28ec0c | 873 | 4 + /* AID */ |
a38700dd | 874 | 4 + /* oper classes */ |
1277b4a9 LK |
875 | extra_ies_len + |
876 | sizeof(struct ieee80211_tdls_lnkie)); | |
95224fe8 | 877 | if (!skb) |
c2733905 | 878 | return NULL; |
95224fe8 AN |
879 | |
880 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
881 | ||
882 | switch (action_code) { | |
883 | case WLAN_TDLS_SETUP_REQUEST: | |
884 | case WLAN_TDLS_SETUP_RESPONSE: | |
885 | case WLAN_TDLS_SETUP_CONFIRM: | |
886 | case WLAN_TDLS_TEARDOWN: | |
887 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
a7a6bdd0 | 888 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 889 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
c2733905 AN |
890 | ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy, |
891 | sdata->dev, peer, | |
95224fe8 AN |
892 | action_code, dialog_token, |
893 | status_code, skb); | |
95224fe8 AN |
894 | break; |
895 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
c2733905 AN |
896 | ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev, |
897 | peer, action_code, | |
95224fe8 AN |
898 | dialog_token, status_code, |
899 | skb); | |
95224fe8 AN |
900 | break; |
901 | default: | |
902 | ret = -ENOTSUPP; | |
903 | break; | |
904 | } | |
905 | ||
906 | if (ret < 0) | |
907 | goto fail; | |
908 | ||
c2733905 AN |
909 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
910 | initiator, extra_ies, extra_ies_len, oper_class, | |
911 | chandef); | |
912 | return skb; | |
913 | ||
914 | fail: | |
915 | dev_kfree_skb(skb); | |
916 | return NULL; | |
917 | } | |
918 | ||
919 | static int | |
920 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, | |
921 | const u8 *peer, u8 action_code, u8 dialog_token, | |
922 | u16 status_code, u32 peer_capability, | |
923 | bool initiator, const u8 *extra_ies, | |
924 | size_t extra_ies_len, u8 oper_class, | |
925 | struct cfg80211_chan_def *chandef) | |
926 | { | |
927 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
928 | struct sk_buff *skb = NULL; | |
929 | struct sta_info *sta; | |
930 | u32 flags = 0; | |
931 | int ret = 0; | |
932 | ||
626911cc AN |
933 | rcu_read_lock(); |
934 | sta = sta_info_get(sdata, peer); | |
935 | ||
936 | /* infer the initiator if we can, to support old userspace */ | |
95224fe8 AN |
937 | switch (action_code) { |
938 | case WLAN_TDLS_SETUP_REQUEST: | |
8b94148c | 939 | if (sta) { |
626911cc | 940 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
941 | sta->sta.tdls_initiator = false; |
942 | } | |
626911cc | 943 | /* fall-through */ |
95224fe8 | 944 | case WLAN_TDLS_SETUP_CONFIRM: |
95224fe8 | 945 | case WLAN_TDLS_DISCOVERY_REQUEST: |
626911cc | 946 | initiator = true; |
95224fe8 AN |
947 | break; |
948 | case WLAN_TDLS_SETUP_RESPONSE: | |
626911cc AN |
949 | /* |
950 | * In some testing scenarios, we send a request and response. | |
951 | * Make the last packet sent take effect for the initiator | |
952 | * value. | |
953 | */ | |
8b94148c | 954 | if (sta) { |
626911cc | 955 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
956 | sta->sta.tdls_initiator = true; |
957 | } | |
626911cc | 958 | /* fall-through */ |
95224fe8 | 959 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
626911cc | 960 | initiator = false; |
2fb6b9b8 AN |
961 | break; |
962 | case WLAN_TDLS_TEARDOWN: | |
a7a6bdd0 | 963 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 964 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
2fb6b9b8 | 965 | /* any value is ok */ |
95224fe8 AN |
966 | break; |
967 | default: | |
968 | ret = -ENOTSUPP; | |
626911cc | 969 | break; |
95224fe8 AN |
970 | } |
971 | ||
46792a2d AN |
972 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
973 | initiator = true; | |
2fb6b9b8 | 974 | |
626911cc AN |
975 | rcu_read_unlock(); |
976 | if (ret < 0) | |
977 | goto fail; | |
978 | ||
c2733905 AN |
979 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code, |
980 | dialog_token, status_code, | |
981 | initiator, extra_ies, | |
982 | extra_ies_len, oper_class, | |
983 | chandef); | |
984 | if (!skb) { | |
985 | ret = -EINVAL; | |
986 | goto fail; | |
987 | } | |
988 | ||
989 | if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { | |
95224fe8 AN |
990 | ieee80211_tx_skb(sdata, skb); |
991 | return 0; | |
992 | } | |
993 | ||
994 | /* | |
995 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise | |
996 | * we should default to AC_VI. | |
997 | */ | |
998 | switch (action_code) { | |
999 | case WLAN_TDLS_SETUP_REQUEST: | |
1000 | case WLAN_TDLS_SETUP_RESPONSE: | |
1001 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); | |
1002 | skb->priority = 2; | |
1003 | break; | |
1004 | default: | |
1005 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); | |
1006 | skb->priority = 5; | |
1007 | break; | |
1008 | } | |
1009 | ||
1277b4a9 LK |
1010 | /* |
1011 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. | |
1012 | * Later, if no ACK is returned from peer, we will re-send the teardown | |
1013 | * packet through the AP. | |
1014 | */ | |
1015 | if ((action_code == WLAN_TDLS_TEARDOWN) && | |
30686bf7 | 1016 | ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
1277b4a9 LK |
1017 | bool try_resend; /* Should we keep skb for possible resend */ |
1018 | ||
1019 | /* If not sending directly to peer - no point in keeping skb */ | |
1020 | rcu_read_lock(); | |
1021 | sta = sta_info_get(sdata, peer); | |
1022 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1023 | rcu_read_unlock(); | |
1024 | ||
1025 | spin_lock_bh(&sdata->u.mgd.teardown_lock); | |
1026 | if (try_resend && !sdata->u.mgd.teardown_skb) { | |
1027 | /* Mark it as requiring TX status callback */ | |
1028 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1029 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
1030 | ||
1031 | /* | |
1032 | * skb is copied since mac80211 will later set | |
1033 | * properties that might not be the same as the AP, | |
1034 | * such as encryption, QoS, addresses, etc. | |
1035 | * | |
1036 | * No problem if skb_copy() fails, so no need to check. | |
1037 | */ | |
1038 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); | |
1039 | sdata->u.mgd.orig_teardown_skb = skb; | |
1040 | } | |
1041 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); | |
1042 | } | |
1043 | ||
95224fe8 AN |
1044 | /* disable bottom halves when entering the Tx path */ |
1045 | local_bh_disable(); | |
1277b4a9 | 1046 | __ieee80211_subif_start_xmit(skb, dev, flags); |
95224fe8 AN |
1047 | local_bh_enable(); |
1048 | ||
1049 | return ret; | |
1050 | ||
1051 | fail: | |
1052 | dev_kfree_skb(skb); | |
1053 | return ret; | |
1054 | } | |
1055 | ||
191dd469 AN |
1056 | static int |
1057 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, | |
1058 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1059 | u16 status_code, u32 peer_capability, bool initiator, | |
1060 | const u8 *extra_ies, size_t extra_ies_len) | |
17e6a59a AN |
1061 | { |
1062 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1063 | struct ieee80211_local *local = sdata->local; | |
d51c2ea3 | 1064 | enum ieee80211_smps_mode smps_mode = sdata->u.mgd.driver_smps_mode; |
17e6a59a AN |
1065 | int ret; |
1066 | ||
d51c2ea3 AN |
1067 | /* don't support setup with forced SMPS mode that's not off */ |
1068 | if (smps_mode != IEEE80211_SMPS_AUTOMATIC && | |
1069 | smps_mode != IEEE80211_SMPS_OFF) { | |
1070 | tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n", | |
1071 | smps_mode); | |
1072 | return -ENOTSUPP; | |
1073 | } | |
1074 | ||
17e6a59a AN |
1075 | mutex_lock(&local->mtx); |
1076 | ||
1077 | /* we don't support concurrent TDLS peer setups */ | |
81dd2b88 AN |
1078 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
1079 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { | |
17e6a59a | 1080 | ret = -EBUSY; |
ae2e9fba | 1081 | goto out_unlock; |
17e6a59a AN |
1082 | } |
1083 | ||
7adc3e46 AN |
1084 | /* |
1085 | * make sure we have a STA representing the peer so we drop or buffer | |
1086 | * non-TDLS-setup frames to the peer. We can't send other packets | |
6ae32e5d AN |
1087 | * during setup through the AP path. |
1088 | * Allow error packets to be sent - sometimes we don't even add a STA | |
1089 | * before failing the setup. | |
7adc3e46 | 1090 | */ |
6ae32e5d AN |
1091 | if (status_code == 0) { |
1092 | rcu_read_lock(); | |
1093 | if (!sta_info_get(sdata, peer)) { | |
1094 | rcu_read_unlock(); | |
1095 | ret = -ENOLINK; | |
ae2e9fba | 1096 | goto out_unlock; |
6ae32e5d | 1097 | } |
7adc3e46 | 1098 | rcu_read_unlock(); |
7adc3e46 | 1099 | } |
7adc3e46 | 1100 | |
3b24f4c6 | 1101 | ieee80211_flush_queues(local, sdata, false); |
ae2e9fba AN |
1102 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
1103 | mutex_unlock(&local->mtx); | |
db67d661 | 1104 | |
ae2e9fba | 1105 | /* we cannot take the mutex while preparing the setup packet */ |
17e6a59a AN |
1106 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
1107 | dialog_token, status_code, | |
2fb6b9b8 | 1108 | peer_capability, initiator, |
c2733905 AN |
1109 | extra_ies, extra_ies_len, 0, |
1110 | NULL); | |
ae2e9fba AN |
1111 | if (ret < 0) { |
1112 | mutex_lock(&local->mtx); | |
1113 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
1114 | mutex_unlock(&local->mtx); | |
1115 | return ret; | |
1116 | } | |
17e6a59a | 1117 | |
191dd469 | 1118 | ieee80211_queue_delayed_work(&sdata->local->hw, |
81dd2b88 | 1119 | &sdata->u.mgd.tdls_peer_del_work, |
191dd469 | 1120 | TDLS_PEER_SETUP_TIMEOUT); |
ae2e9fba | 1121 | return 0; |
17e6a59a | 1122 | |
ae2e9fba | 1123 | out_unlock: |
17e6a59a | 1124 | mutex_unlock(&local->mtx); |
191dd469 AN |
1125 | return ret; |
1126 | } | |
1127 | ||
db67d661 AN |
1128 | static int |
1129 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, | |
1130 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1131 | u16 status_code, u32 peer_capability, | |
1132 | bool initiator, const u8 *extra_ies, | |
1133 | size_t extra_ies_len) | |
1134 | { | |
1135 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1136 | struct ieee80211_local *local = sdata->local; | |
1137 | struct sta_info *sta; | |
1138 | int ret; | |
1139 | ||
1140 | /* | |
1141 | * No packets can be transmitted to the peer via the AP during setup - | |
1142 | * the STA is set as a TDLS peer, but is not authorized. | |
1143 | * During teardown, we prevent direct transmissions by stopping the | |
1144 | * queues and flushing all direct packets. | |
1145 | */ | |
1146 | ieee80211_stop_vif_queues(local, sdata, | |
1147 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
3b24f4c6 | 1148 | ieee80211_flush_queues(local, sdata, false); |
db67d661 AN |
1149 | |
1150 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, | |
1151 | dialog_token, status_code, | |
1152 | peer_capability, initiator, | |
c2733905 AN |
1153 | extra_ies, extra_ies_len, 0, |
1154 | NULL); | |
db67d661 AN |
1155 | if (ret < 0) |
1156 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", | |
1157 | ret); | |
1158 | ||
1159 | /* | |
1160 | * Remove the STA AUTH flag to force further traffic through the AP. If | |
1161 | * the STA was unreachable, it was already removed. | |
1162 | */ | |
1163 | rcu_read_lock(); | |
1164 | sta = sta_info_get(sdata, peer); | |
1165 | if (sta) | |
1166 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1167 | rcu_read_unlock(); | |
1168 | ||
1169 | ieee80211_wake_vif_queues(local, sdata, | |
1170 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
1171 | ||
1172 | return 0; | |
1173 | } | |
1174 | ||
191dd469 AN |
1175 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
1176 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1177 | u16 status_code, u32 peer_capability, | |
1178 | bool initiator, const u8 *extra_ies, | |
1179 | size_t extra_ies_len) | |
1180 | { | |
1181 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1182 | int ret; | |
1183 | ||
1184 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1185 | return -ENOTSUPP; | |
1186 | ||
1187 | /* make sure we are in managed mode, and associated */ | |
1188 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
1189 | !sdata->u.mgd.associated) | |
1190 | return -EINVAL; | |
1191 | ||
1192 | switch (action_code) { | |
1193 | case WLAN_TDLS_SETUP_REQUEST: | |
1194 | case WLAN_TDLS_SETUP_RESPONSE: | |
1195 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, | |
1196 | dialog_token, status_code, | |
1197 | peer_capability, initiator, | |
1198 | extra_ies, extra_ies_len); | |
1199 | break; | |
1200 | case WLAN_TDLS_TEARDOWN: | |
db67d661 AN |
1201 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
1202 | action_code, dialog_token, | |
1203 | status_code, | |
1204 | peer_capability, initiator, | |
1205 | extra_ies, extra_ies_len); | |
1206 | break; | |
191dd469 | 1207 | case WLAN_TDLS_DISCOVERY_REQUEST: |
ee10f2c7 AN |
1208 | /* |
1209 | * Protect the discovery so we can hear the TDLS discovery | |
1210 | * response frame. It is transmitted directly and not buffered | |
1211 | * by the AP. | |
1212 | */ | |
1213 | drv_mgd_protect_tdls_discover(sdata->local, sdata); | |
1214 | /* fall-through */ | |
1215 | case WLAN_TDLS_SETUP_CONFIRM: | |
191dd469 AN |
1216 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
1217 | /* no special handling */ | |
1218 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, | |
1219 | action_code, | |
1220 | dialog_token, | |
1221 | status_code, | |
1222 | peer_capability, | |
1223 | initiator, extra_ies, | |
c2733905 | 1224 | extra_ies_len, 0, NULL); |
191dd469 AN |
1225 | break; |
1226 | default: | |
1227 | ret = -EOPNOTSUPP; | |
1228 | break; | |
1229 | } | |
17e6a59a AN |
1230 | |
1231 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", | |
1232 | action_code, peer, ret); | |
1233 | return ret; | |
1234 | } | |
1235 | ||
0fabfaaf AN |
1236 | static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata) |
1237 | { | |
1238 | struct ieee80211_local *local = sdata->local; | |
1239 | struct ieee80211_chanctx_conf *conf; | |
1240 | struct ieee80211_chanctx *ctx; | |
1241 | ||
1242 | mutex_lock(&local->chanctx_mtx); | |
1243 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1244 | lockdep_is_held(&local->chanctx_mtx)); | |
1245 | if (conf) { | |
1246 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1247 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1248 | } | |
1249 | mutex_unlock(&local->chanctx_mtx); | |
1250 | } | |
1251 | ||
95224fe8 | 1252 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
3b3a0162 | 1253 | const u8 *peer, enum nl80211_tdls_operation oper) |
95224fe8 AN |
1254 | { |
1255 | struct sta_info *sta; | |
1256 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
17e6a59a AN |
1257 | struct ieee80211_local *local = sdata->local; |
1258 | int ret; | |
95224fe8 AN |
1259 | |
1260 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1261 | return -ENOTSUPP; | |
1262 | ||
1263 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1264 | return -EINVAL; | |
1265 | ||
17e6a59a AN |
1266 | switch (oper) { |
1267 | case NL80211_TDLS_ENABLE_LINK: | |
1268 | case NL80211_TDLS_DISABLE_LINK: | |
1269 | break; | |
1270 | case NL80211_TDLS_TEARDOWN: | |
1271 | case NL80211_TDLS_SETUP: | |
1272 | case NL80211_TDLS_DISCOVERY_REQ: | |
1273 | /* We don't support in-driver setup/teardown/discovery */ | |
1274 | return -ENOTSUPP; | |
1275 | } | |
1276 | ||
1277 | mutex_lock(&local->mtx); | |
95224fe8 AN |
1278 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
1279 | ||
1280 | switch (oper) { | |
1281 | case NL80211_TDLS_ENABLE_LINK: | |
c5a71688 AN |
1282 | if (sdata->vif.csa_active) { |
1283 | tdls_dbg(sdata, "TDLS: disallow link during CSA\n"); | |
1284 | ret = -EBUSY; | |
1285 | break; | |
1286 | } | |
1287 | ||
0fabfaaf AN |
1288 | iee80211_tdls_recalc_chanctx(sdata); |
1289 | ||
95224fe8 AN |
1290 | rcu_read_lock(); |
1291 | sta = sta_info_get(sdata, peer); | |
1292 | if (!sta) { | |
1293 | rcu_read_unlock(); | |
17e6a59a AN |
1294 | ret = -ENOLINK; |
1295 | break; | |
95224fe8 AN |
1296 | } |
1297 | ||
1298 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1299 | rcu_read_unlock(); | |
17e6a59a | 1300 | |
81dd2b88 AN |
1301 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
1302 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); | |
17e6a59a | 1303 | ret = 0; |
95224fe8 AN |
1304 | break; |
1305 | case NL80211_TDLS_DISABLE_LINK: | |
bb3f8486 LK |
1306 | /* |
1307 | * The teardown message in ieee80211_tdls_mgmt_teardown() was | |
1308 | * created while the queues were stopped, so it might still be | |
1309 | * pending. Before flushing the queues we need to be sure the | |
1310 | * message is handled by the tasklet handling pending messages, | |
1311 | * otherwise we might start destroying the station before | |
1312 | * sending the teardown packet. | |
1313 | * Note that this only forces the tasklet to flush pendings - | |
1314 | * not to stop the tasklet from rescheduling itself. | |
1315 | */ | |
1316 | tasklet_kill(&local->tx_pending_tasklet); | |
db67d661 | 1317 | /* flush a potentially queued teardown packet */ |
3b24f4c6 | 1318 | ieee80211_flush_queues(local, sdata, false); |
db67d661 | 1319 | |
17e6a59a | 1320 | ret = sta_info_destroy_addr(sdata, peer); |
0fabfaaf | 1321 | iee80211_tdls_recalc_chanctx(sdata); |
17e6a59a | 1322 | break; |
95224fe8 | 1323 | default: |
17e6a59a AN |
1324 | ret = -ENOTSUPP; |
1325 | break; | |
95224fe8 AN |
1326 | } |
1327 | ||
81dd2b88 AN |
1328 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
1329 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); | |
1330 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
1331 | } |
1332 | ||
d51c2ea3 AN |
1333 | if (ret == 0) |
1334 | ieee80211_queue_work(&sdata->local->hw, | |
1335 | &sdata->u.mgd.request_smps_work); | |
1336 | ||
17e6a59a AN |
1337 | mutex_unlock(&local->mtx); |
1338 | return ret; | |
95224fe8 | 1339 | } |
c887f0d3 AN |
1340 | |
1341 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, | |
1342 | enum nl80211_tdls_operation oper, | |
1343 | u16 reason_code, gfp_t gfp) | |
1344 | { | |
1345 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1346 | ||
1347 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { | |
1348 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", | |
1349 | oper); | |
1350 | return; | |
1351 | } | |
1352 | ||
1353 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); | |
1354 | } | |
1355 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); | |
a7a6bdd0 AN |
1356 | |
1357 | static void | |
1358 | iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout) | |
1359 | { | |
1360 | struct ieee80211_ch_switch_timing *ch_sw; | |
1361 | ||
1362 | *buf++ = WLAN_EID_CHAN_SWITCH_TIMING; | |
1363 | *buf++ = sizeof(struct ieee80211_ch_switch_timing); | |
1364 | ||
1365 | ch_sw = (void *)buf; | |
1366 | ch_sw->switch_time = cpu_to_le16(switch_time); | |
1367 | ch_sw->switch_timeout = cpu_to_le16(switch_timeout); | |
1368 | } | |
1369 | ||
1370 | /* find switch timing IE in SKB ready for Tx */ | |
1371 | static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb) | |
1372 | { | |
1373 | struct ieee80211_tdls_data *tf; | |
1374 | const u8 *ie_start; | |
1375 | ||
1376 | /* | |
1377 | * Get the offset for the new location of the switch timing IE. | |
1378 | * The SKB network header will now point to the "payload_type" | |
1379 | * element of the TDLS data frame struct. | |
1380 | */ | |
1381 | tf = container_of(skb->data + skb_network_offset(skb), | |
1382 | struct ieee80211_tdls_data, payload_type); | |
1383 | ie_start = tf->u.chan_switch_req.variable; | |
1384 | return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start, | |
1385 | skb->len - (ie_start - skb->data)); | |
1386 | } | |
1387 | ||
1388 | static struct sk_buff * | |
1389 | ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class, | |
1390 | struct cfg80211_chan_def *chandef, | |
1391 | u32 *ch_sw_tm_ie_offset) | |
1392 | { | |
1393 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1394 | u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
1395 | 2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1396 | int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing); | |
1397 | u8 *pos = extra_ies; | |
1398 | struct sk_buff *skb; | |
1399 | ||
1400 | /* | |
1401 | * if chandef points to a wide channel add a Secondary-Channel | |
1402 | * Offset information element | |
1403 | */ | |
1404 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1405 | struct ieee80211_sec_chan_offs_ie *sec_chan_ie; | |
1406 | bool ht40plus; | |
1407 | ||
1408 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; | |
1409 | *pos++ = sizeof(*sec_chan_ie); | |
1410 | sec_chan_ie = (void *)pos; | |
1411 | ||
1412 | ht40plus = cfg80211_get_chandef_type(chandef) == | |
1413 | NL80211_CHAN_HT40PLUS; | |
1414 | sec_chan_ie->sec_chan_offs = ht40plus ? | |
1415 | IEEE80211_HT_PARAM_CHA_SEC_ABOVE : | |
1416 | IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1417 | pos += sizeof(*sec_chan_ie); | |
1418 | ||
1419 | extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
1420 | } | |
1421 | ||
1422 | /* just set the values to 0, this is a template */ | |
1423 | iee80211_tdls_add_ch_switch_timing(pos, 0, 0); | |
1424 | ||
1425 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1426 | WLAN_TDLS_CHANNEL_SWITCH_REQUEST, | |
1427 | 0, 0, !sta->sta.tdls_initiator, | |
1428 | extra_ies, extra_ies_len, | |
1429 | oper_class, chandef); | |
1430 | if (!skb) | |
1431 | return NULL; | |
1432 | ||
1433 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1434 | if (IS_ERR(skb)) { | |
1435 | tdls_dbg(sdata, "Failed building TDLS channel switch frame\n"); | |
1436 | return NULL; | |
1437 | } | |
1438 | ||
1439 | if (ch_sw_tm_ie_offset) { | |
1440 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1441 | ||
1442 | if (!tm_ie) { | |
1443 | tdls_dbg(sdata, "No switch timing IE in TDLS switch\n"); | |
1444 | dev_kfree_skb_any(skb); | |
1445 | return NULL; | |
1446 | } | |
1447 | ||
1448 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1449 | } | |
1450 | ||
1451 | tdls_dbg(sdata, | |
1452 | "TDLS channel switch request template for %pM ch %d width %d\n", | |
1453 | sta->sta.addr, chandef->chan->center_freq, chandef->width); | |
1454 | return skb; | |
1455 | } | |
1456 | ||
1457 | int | |
1458 | ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, | |
1459 | const u8 *addr, u8 oper_class, | |
1460 | struct cfg80211_chan_def *chandef) | |
1461 | { | |
1462 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1463 | struct ieee80211_local *local = sdata->local; | |
1464 | struct sta_info *sta; | |
1465 | struct sk_buff *skb = NULL; | |
1466 | u32 ch_sw_tm_ie; | |
1467 | int ret; | |
1468 | ||
1469 | mutex_lock(&local->sta_mtx); | |
1470 | sta = sta_info_get(sdata, addr); | |
1471 | if (!sta) { | |
1472 | tdls_dbg(sdata, | |
1473 | "Invalid TDLS peer %pM for channel switch request\n", | |
1474 | addr); | |
1475 | ret = -ENOENT; | |
1476 | goto out; | |
1477 | } | |
1478 | ||
1479 | if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) { | |
1480 | tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n", | |
1481 | addr); | |
1482 | ret = -ENOTSUPP; | |
1483 | goto out; | |
1484 | } | |
1485 | ||
1486 | skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef, | |
1487 | &ch_sw_tm_ie); | |
1488 | if (!skb) { | |
1489 | ret = -ENOENT; | |
1490 | goto out; | |
1491 | } | |
1492 | ||
1493 | ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class, | |
1494 | chandef, skb, ch_sw_tm_ie); | |
1495 | if (!ret) | |
1496 | set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1497 | ||
1498 | out: | |
1499 | mutex_unlock(&local->sta_mtx); | |
1500 | dev_kfree_skb_any(skb); | |
1501 | return ret; | |
1502 | } | |
1503 | ||
1504 | void | |
1505 | ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, | |
1506 | struct net_device *dev, | |
1507 | const u8 *addr) | |
1508 | { | |
1509 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1510 | struct ieee80211_local *local = sdata->local; | |
1511 | struct sta_info *sta; | |
1512 | ||
1513 | mutex_lock(&local->sta_mtx); | |
1514 | sta = sta_info_get(sdata, addr); | |
1515 | if (!sta) { | |
1516 | tdls_dbg(sdata, | |
1517 | "Invalid TDLS peer %pM for channel switch cancel\n", | |
1518 | addr); | |
1519 | goto out; | |
1520 | } | |
1521 | ||
1522 | if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
1523 | tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n", | |
1524 | addr); | |
1525 | goto out; | |
1526 | } | |
1527 | ||
1528 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
1529 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1530 | ||
1531 | out: | |
1532 | mutex_unlock(&local->sta_mtx); | |
1533 | } | |
8a4d32f3 AN |
1534 | |
1535 | static struct sk_buff * | |
1536 | ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta, | |
1537 | u32 *ch_sw_tm_ie_offset) | |
1538 | { | |
1539 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1540 | struct sk_buff *skb; | |
1541 | u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1542 | ||
1543 | /* initial timing are always zero in the template */ | |
1544 | iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0); | |
1545 | ||
1546 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1547 | WLAN_TDLS_CHANNEL_SWITCH_RESPONSE, | |
1548 | 0, 0, !sta->sta.tdls_initiator, | |
1549 | extra_ies, sizeof(extra_ies), 0, NULL); | |
1550 | if (!skb) | |
1551 | return NULL; | |
1552 | ||
1553 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1554 | if (IS_ERR(skb)) { | |
1555 | tdls_dbg(sdata, | |
1556 | "Failed building TDLS channel switch resp frame\n"); | |
1557 | return NULL; | |
1558 | } | |
1559 | ||
1560 | if (ch_sw_tm_ie_offset) { | |
1561 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1562 | ||
1563 | if (!tm_ie) { | |
1564 | tdls_dbg(sdata, | |
1565 | "No switch timing IE in TDLS switch resp\n"); | |
1566 | dev_kfree_skb_any(skb); | |
1567 | return NULL; | |
1568 | } | |
1569 | ||
1570 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1571 | } | |
1572 | ||
1573 | tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n", | |
1574 | sta->sta.addr); | |
1575 | return skb; | |
1576 | } | |
1577 | ||
1578 | static int | |
1579 | ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, | |
1580 | struct sk_buff *skb) | |
1581 | { | |
1582 | struct ieee80211_local *local = sdata->local; | |
1583 | struct ieee802_11_elems elems; | |
1584 | struct sta_info *sta; | |
1585 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1586 | bool local_initiator; | |
1587 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1588 | int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable); | |
1589 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1590 | int ret; | |
1591 | ||
1592 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
1593 | params.timestamp = rx_status->device_timestamp; | |
1594 | ||
1595 | if (skb->len < baselen) { | |
1596 | tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n", | |
1597 | skb->len); | |
1598 | return -EINVAL; | |
1599 | } | |
1600 | ||
1601 | mutex_lock(&local->sta_mtx); | |
1602 | sta = sta_info_get(sdata, tf->sa); | |
1603 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1604 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1605 | tf->sa); | |
1606 | ret = -EINVAL; | |
1607 | goto out; | |
1608 | } | |
1609 | ||
1610 | params.sta = &sta->sta; | |
1611 | params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code); | |
1612 | if (params.status != 0) { | |
1613 | ret = 0; | |
1614 | goto call_drv; | |
1615 | } | |
1616 | ||
1617 | ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, | |
1618 | skb->len - baselen, false, &elems); | |
1619 | if (elems.parse_error) { | |
1620 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); | |
1621 | ret = -EINVAL; | |
1622 | goto out; | |
1623 | } | |
1624 | ||
1625 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1626 | tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); | |
1627 | ret = -EINVAL; | |
1628 | goto out; | |
1629 | } | |
1630 | ||
1631 | /* validate the initiator is set correctly */ | |
1632 | local_initiator = | |
1633 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1634 | if (local_initiator == sta->sta.tdls_initiator) { | |
1635 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1636 | ret = -EINVAL; | |
1637 | goto out; | |
1638 | } | |
1639 | ||
1640 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1641 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1642 | ||
1643 | params.tmpl_skb = | |
1644 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); | |
1645 | if (!params.tmpl_skb) { | |
1646 | ret = -ENOENT; | |
1647 | goto out; | |
1648 | } | |
1649 | ||
1650 | call_drv: | |
1651 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1652 | ||
1653 | tdls_dbg(sdata, | |
1654 | "TDLS channel switch response received from %pM status %d\n", | |
1655 | tf->sa, params.status); | |
1656 | ||
1657 | out: | |
1658 | mutex_unlock(&local->sta_mtx); | |
1659 | dev_kfree_skb_any(params.tmpl_skb); | |
1660 | return ret; | |
1661 | } | |
1662 | ||
1663 | static int | |
1664 | ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, | |
1665 | struct sk_buff *skb) | |
1666 | { | |
1667 | struct ieee80211_local *local = sdata->local; | |
1668 | struct ieee802_11_elems elems; | |
1669 | struct cfg80211_chan_def chandef; | |
1670 | struct ieee80211_channel *chan; | |
1671 | enum nl80211_channel_type chan_type; | |
1672 | int freq; | |
1673 | u8 target_channel, oper_class; | |
1674 | bool local_initiator; | |
1675 | struct sta_info *sta; | |
1676 | enum ieee80211_band band; | |
1677 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1678 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1679 | int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable); | |
1680 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1681 | int ret = 0; | |
1682 | ||
1683 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
1684 | params.timestamp = rx_status->device_timestamp; | |
1685 | ||
1686 | if (skb->len < baselen) { | |
1687 | tdls_dbg(sdata, "TDLS channel switch req too short: %d\n", | |
1688 | skb->len); | |
1689 | return -EINVAL; | |
1690 | } | |
1691 | ||
1692 | target_channel = tf->u.chan_switch_req.target_channel; | |
1693 | oper_class = tf->u.chan_switch_req.oper_class; | |
1694 | ||
1695 | /* | |
1696 | * We can't easily infer the channel band. The operating class is | |
1697 | * ambiguous - there are multiple tables (US/Europe/JP/Global). The | |
1698 | * solution here is to treat channels with number >14 as 5GHz ones, | |
1699 | * and specifically check for the (oper_class, channel) combinations | |
1700 | * where this doesn't hold. These are thankfully unique according to | |
1701 | * IEEE802.11-2012. | |
1702 | * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as | |
1703 | * valid here. | |
1704 | */ | |
1705 | if ((oper_class == 112 || oper_class == 2 || oper_class == 3 || | |
1706 | oper_class == 4 || oper_class == 5 || oper_class == 6) && | |
1707 | target_channel < 14) | |
1708 | band = IEEE80211_BAND_5GHZ; | |
1709 | else | |
1710 | band = target_channel < 14 ? IEEE80211_BAND_2GHZ : | |
1711 | IEEE80211_BAND_5GHZ; | |
1712 | ||
1713 | freq = ieee80211_channel_to_frequency(target_channel, band); | |
1714 | if (freq == 0) { | |
1715 | tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n", | |
1716 | target_channel); | |
1717 | return -EINVAL; | |
1718 | } | |
1719 | ||
1720 | chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); | |
1721 | if (!chan) { | |
1722 | tdls_dbg(sdata, | |
1723 | "Unsupported channel for TDLS chan switch: %d\n", | |
1724 | target_channel); | |
1725 | return -EINVAL; | |
1726 | } | |
1727 | ||
1728 | ieee802_11_parse_elems(tf->u.chan_switch_req.variable, | |
1729 | skb->len - baselen, false, &elems); | |
1730 | if (elems.parse_error) { | |
1731 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); | |
1732 | return -EINVAL; | |
1733 | } | |
1734 | ||
1735 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1736 | tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); | |
1737 | return -EINVAL; | |
1738 | } | |
1739 | ||
1740 | mutex_lock(&local->sta_mtx); | |
1741 | sta = sta_info_get(sdata, tf->sa); | |
1742 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1743 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1744 | tf->sa); | |
1745 | ret = -EINVAL; | |
1746 | goto out; | |
1747 | } | |
1748 | ||
1749 | params.sta = &sta->sta; | |
1750 | ||
1751 | /* validate the initiator is set correctly */ | |
1752 | local_initiator = | |
1753 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1754 | if (local_initiator == sta->sta.tdls_initiator) { | |
1755 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1756 | ret = -EINVAL; | |
1757 | goto out; | |
1758 | } | |
1759 | ||
1760 | if (!sta->sta.ht_cap.ht_supported) { | |
1761 | chan_type = NL80211_CHAN_NO_HT; | |
1762 | } else if (!elems.sec_chan_offs) { | |
1763 | chan_type = NL80211_CHAN_HT20; | |
1764 | } else { | |
1765 | switch (elems.sec_chan_offs->sec_chan_offs) { | |
1766 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1767 | chan_type = NL80211_CHAN_HT40PLUS; | |
1768 | break; | |
1769 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1770 | chan_type = NL80211_CHAN_HT40MINUS; | |
1771 | break; | |
1772 | default: | |
1773 | chan_type = NL80211_CHAN_HT20; | |
1774 | break; | |
1775 | } | |
1776 | } | |
1777 | ||
1778 | cfg80211_chandef_create(&chandef, chan, chan_type); | |
1779 | params.chandef = &chandef; | |
1780 | ||
1781 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1782 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1783 | ||
1784 | params.tmpl_skb = | |
1785 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, | |
1786 | ¶ms.ch_sw_tm_ie); | |
1787 | if (!params.tmpl_skb) { | |
1788 | ret = -ENOENT; | |
1789 | goto out; | |
1790 | } | |
1791 | ||
1792 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1793 | ||
1794 | tdls_dbg(sdata, | |
1795 | "TDLS ch switch request received from %pM ch %d width %d\n", | |
1796 | tf->sa, params.chandef->chan->center_freq, | |
1797 | params.chandef->width); | |
1798 | out: | |
1799 | mutex_unlock(&local->sta_mtx); | |
1800 | dev_kfree_skb_any(params.tmpl_skb); | |
1801 | return ret; | |
1802 | } | |
1803 | ||
c8ff71e6 AN |
1804 | static void |
1805 | ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, | |
1806 | struct sk_buff *skb) | |
8a4d32f3 AN |
1807 | { |
1808 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1809 | struct wiphy *wiphy = sdata->local->hw.wiphy; | |
1810 | ||
c8ff71e6 AN |
1811 | ASSERT_RTNL(); |
1812 | ||
8a4d32f3 AN |
1813 | /* make sure the driver supports it */ |
1814 | if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH)) | |
1815 | return; | |
1816 | ||
1817 | /* we want to access the entire packet */ | |
1818 | if (skb_linearize(skb)) | |
1819 | return; | |
1820 | /* | |
1821 | * The packet/size was already validated by mac80211 Rx path, only look | |
1822 | * at the action type. | |
1823 | */ | |
1824 | switch (tf->action_code) { | |
1825 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: | |
1826 | ieee80211_process_tdls_channel_switch_req(sdata, skb); | |
1827 | break; | |
1828 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: | |
1829 | ieee80211_process_tdls_channel_switch_resp(sdata, skb); | |
1830 | break; | |
1831 | default: | |
1832 | WARN_ON_ONCE(1); | |
1833 | return; | |
1834 | } | |
1835 | } | |
d51c2ea3 AN |
1836 | |
1837 | void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) | |
1838 | { | |
1839 | struct sta_info *sta; | |
1840 | u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED; | |
1841 | ||
1842 | rcu_read_lock(); | |
1843 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1844 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1845 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1846 | continue; | |
1847 | ||
1848 | ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr, | |
1849 | NL80211_TDLS_TEARDOWN, reason, | |
1850 | GFP_ATOMIC); | |
1851 | } | |
1852 | rcu_read_unlock(); | |
1853 | } | |
c8ff71e6 AN |
1854 | |
1855 | void ieee80211_tdls_chsw_work(struct work_struct *wk) | |
1856 | { | |
1857 | struct ieee80211_local *local = | |
1858 | container_of(wk, struct ieee80211_local, tdls_chsw_work); | |
1859 | struct ieee80211_sub_if_data *sdata; | |
1860 | struct sk_buff *skb; | |
1861 | struct ieee80211_tdls_data *tf; | |
1862 | ||
1863 | rtnl_lock(); | |
1864 | while ((skb = skb_dequeue(&local->skb_queue_tdls_chsw))) { | |
1865 | tf = (struct ieee80211_tdls_data *)skb->data; | |
1866 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1867 | if (!ieee80211_sdata_running(sdata) || | |
1868 | sdata->vif.type != NL80211_IFTYPE_STATION || | |
1869 | !ether_addr_equal(tf->da, sdata->vif.addr)) | |
1870 | continue; | |
1871 | ||
1872 | ieee80211_process_tdls_channel_switch(sdata, skb); | |
1873 | break; | |
1874 | } | |
1875 | ||
1876 | kfree_skb(skb); | |
1877 | } | |
1878 | rtnl_unlock(); | |
1879 | } |