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28c61a66 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
95224fe8 AN |
2 | /* |
3 | * mac80211 TDLS handling code | |
4 | * | |
5 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> | |
6 | * Copyright 2014, Intel Corporation | |
d98ad83e | 7 | * Copyright 2014 Intel Mobile Communications GmbH |
59021c67 | 8 | * Copyright 2015 - 2016 Intel Deutschland GmbH |
4abb52a4 | 9 | * Copyright (C) 2019 Intel Corporation |
95224fe8 AN |
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" |
59021c67 | 18 | #include "rate.h" |
cb59bc14 | 19 | #include "wme.h" |
95224fe8 | 20 | |
17e6a59a AN |
21 | /* give usermode some time for retries in setting up the TDLS session */ |
22 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) | |
23 | ||
24 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) | |
25 | { | |
26 | struct ieee80211_sub_if_data *sdata; | |
27 | struct ieee80211_local *local; | |
28 | ||
29 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
81dd2b88 | 30 | u.mgd.tdls_peer_del_work.work); |
17e6a59a AN |
31 | local = sdata->local; |
32 | ||
33 | mutex_lock(&local->mtx); | |
81dd2b88 AN |
34 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
35 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); | |
36 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); | |
37 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
38 | } |
39 | mutex_unlock(&local->mtx); | |
40 | } | |
41 | ||
b98fb44f | 42 | static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, |
78632a17 | 43 | struct sk_buff *skb) |
95224fe8 | 44 | { |
b98fb44f | 45 | struct ieee80211_local *local = sdata->local; |
82c0cc90 | 46 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
78632a17 AN |
47 | bool chan_switch = local->hw.wiphy->features & |
48 | NL80211_FEATURE_TDLS_CHANNEL_SWITCH; | |
82c0cc90 AN |
49 | bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) && |
50 | !ifmgd->tdls_wider_bw_prohibited; | |
e2fb1b83 YT |
51 | bool buffer_sta = ieee80211_hw_check(&local->hw, |
52 | SUPPORTS_TDLS_BUFFER_STA); | |
21a8e9dd | 53 | struct ieee80211_supported_band *sband = ieee80211_get_sband(sdata); |
b98fb44f | 54 | bool vht = sband && sband->vht_cap.vht_supported; |
4df864c1 | 55 | u8 *pos = skb_put(skb, 10); |
95224fe8 AN |
56 | |
57 | *pos++ = WLAN_EID_EXT_CAPABILITY; | |
b98fb44f | 58 | *pos++ = 8; /* len */ |
95224fe8 AN |
59 | *pos++ = 0x0; |
60 | *pos++ = 0x0; | |
61 | *pos++ = 0x0; | |
e2fb1b83 YT |
62 | *pos++ = (chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0) | |
63 | (buffer_sta ? WLAN_EXT_CAPA4_TDLS_BUFFER_STA : 0); | |
95224fe8 | 64 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
b98fb44f AN |
65 | *pos++ = 0; |
66 | *pos++ = 0; | |
67 | *pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0; | |
95224fe8 AN |
68 | } |
69 | ||
f0d29cb9 AN |
70 | static u8 |
71 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, | |
72 | struct sk_buff *skb, u16 start, u16 end, | |
73 | u16 spacing) | |
74 | { | |
75 | u8 subband_cnt = 0, ch_cnt = 0; | |
76 | struct ieee80211_channel *ch; | |
77 | struct cfg80211_chan_def chandef; | |
78 | int i, subband_start; | |
923b352f | 79 | struct wiphy *wiphy = sdata->local->hw.wiphy; |
f0d29cb9 AN |
80 | |
81 | for (i = start; i <= end; i += spacing) { | |
82 | if (!ch_cnt) | |
83 | subband_start = i; | |
84 | ||
85 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); | |
86 | if (ch) { | |
87 | /* we will be active on the channel */ | |
f0d29cb9 | 88 | cfg80211_chandef_create(&chandef, ch, |
50075892 | 89 | NL80211_CHAN_NO_HT); |
923b352f AN |
90 | if (cfg80211_reg_can_beacon_relax(wiphy, &chandef, |
91 | sdata->wdev.iftype)) { | |
f0d29cb9 | 92 | ch_cnt++; |
50075892 AN |
93 | /* |
94 | * check if the next channel is also part of | |
95 | * this allowed range | |
96 | */ | |
f0d29cb9 AN |
97 | continue; |
98 | } | |
99 | } | |
100 | ||
50075892 AN |
101 | /* |
102 | * we've reached the end of a range, with allowed channels | |
103 | * found | |
104 | */ | |
f0d29cb9 AN |
105 | if (ch_cnt) { |
106 | u8 *pos = skb_put(skb, 2); | |
107 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
108 | *pos++ = ch_cnt; | |
109 | ||
110 | subband_cnt++; | |
111 | ch_cnt = 0; | |
112 | } | |
113 | } | |
114 | ||
50075892 AN |
115 | /* all channels in the requested range are allowed - add them here */ |
116 | if (ch_cnt) { | |
117 | u8 *pos = skb_put(skb, 2); | |
118 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
119 | *pos++ = ch_cnt; | |
120 | ||
121 | subband_cnt++; | |
122 | } | |
123 | ||
f0d29cb9 AN |
124 | return subband_cnt; |
125 | } | |
126 | ||
127 | static void | |
128 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, | |
129 | struct sk_buff *skb) | |
130 | { | |
131 | /* | |
132 | * Add possible channels for TDLS. These are channels that are allowed | |
133 | * to be active. | |
134 | */ | |
135 | u8 subband_cnt; | |
136 | u8 *pos = skb_put(skb, 2); | |
137 | ||
138 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
139 | ||
140 | /* | |
141 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as | |
142 | * this doesn't happen in real world scenarios. | |
143 | */ | |
144 | ||
145 | /* 2GHz, with 5MHz spacing */ | |
146 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); | |
147 | ||
148 | /* 5GHz, with 20MHz spacing */ | |
149 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); | |
150 | ||
151 | /* length */ | |
152 | *pos = 2 * subband_cnt; | |
153 | } | |
154 | ||
a38700dd AN |
155 | static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, |
156 | struct sk_buff *skb) | |
157 | { | |
158 | u8 *pos; | |
159 | u8 op_class; | |
160 | ||
161 | if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef, | |
162 | &op_class)) | |
163 | return; | |
164 | ||
165 | pos = skb_put(skb, 4); | |
166 | *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES; | |
167 | *pos++ = 2; /* len */ | |
168 | ||
169 | *pos++ = op_class; | |
170 | *pos++ = op_class; /* give current operating class as alternate too */ | |
171 | } | |
172 | ||
2cedd879 AN |
173 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
174 | { | |
4df864c1 | 175 | u8 *pos = skb_put(skb, 3); |
2cedd879 AN |
176 | |
177 | *pos++ = WLAN_EID_BSS_COEX_2040; | |
178 | *pos++ = 1; /* len */ | |
179 | ||
180 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; | |
181 | } | |
182 | ||
dd8c0b03 AN |
183 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
184 | u16 status_code) | |
95224fe8 | 185 | { |
21a8e9dd MSS |
186 | struct ieee80211_supported_band *sband; |
187 | ||
dd8c0b03 AN |
188 | /* The capability will be 0 when sending a failure code */ |
189 | if (status_code != 0) | |
190 | return 0; | |
191 | ||
21a8e9dd MSS |
192 | sband = ieee80211_get_sband(sdata); |
193 | if (sband && sband->band == NL80211_BAND_2GHZ) { | |
ea1b2b45 JB |
194 | return WLAN_CAPABILITY_SHORT_SLOT_TIME | |
195 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
196 | } | |
95224fe8 | 197 | |
ea1b2b45 | 198 | return 0; |
95224fe8 AN |
199 | } |
200 | ||
1606ef4a AN |
201 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
202 | struct sk_buff *skb, const u8 *peer, | |
203 | bool initiator) | |
95224fe8 AN |
204 | { |
205 | struct ieee80211_tdls_lnkie *lnkid; | |
1606ef4a AN |
206 | const u8 *init_addr, *rsp_addr; |
207 | ||
208 | if (initiator) { | |
209 | init_addr = sdata->vif.addr; | |
210 | rsp_addr = peer; | |
211 | } else { | |
212 | init_addr = peer; | |
213 | rsp_addr = sdata->vif.addr; | |
214 | } | |
95224fe8 | 215 | |
4df864c1 | 216 | lnkid = skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); |
95224fe8 AN |
217 | |
218 | lnkid->ie_type = WLAN_EID_LINK_ID; | |
219 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; | |
220 | ||
1606ef4a AN |
221 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
222 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); | |
223 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); | |
95224fe8 AN |
224 | } |
225 | ||
fb28ec0c AN |
226 | static void |
227 | ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) | |
228 | { | |
4df864c1 | 229 | u8 *pos = skb_put(skb, 4); |
fb28ec0c AN |
230 | |
231 | *pos++ = WLAN_EID_AID; | |
232 | *pos++ = 2; /* len */ | |
1db364c8 | 233 | put_unaligned_le16(sdata->vif.bss_conf.aid, pos); |
fb28ec0c AN |
234 | } |
235 | ||
6f7eaa47 AN |
236 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
237 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) | |
238 | { | |
239 | switch (ac) { | |
240 | default: | |
241 | WARN_ON_ONCE(1); | |
fc0561dc | 242 | fallthrough; |
6f7eaa47 AN |
243 | case 0: |
244 | return IEEE80211_AC_BE; | |
245 | case 1: | |
246 | return IEEE80211_AC_BK; | |
247 | case 2: | |
248 | return IEEE80211_AC_VI; | |
249 | case 3: | |
250 | return IEEE80211_AC_VO; | |
251 | } | |
252 | } | |
253 | ||
254 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) | |
255 | { | |
256 | u8 ret; | |
257 | ||
258 | ret = aifsn & 0x0f; | |
259 | if (acm) | |
260 | ret |= 0x10; | |
261 | ret |= (aci << 5) & 0x60; | |
262 | return ret; | |
263 | } | |
264 | ||
265 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) | |
266 | { | |
267 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | | |
268 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); | |
269 | } | |
270 | ||
271 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, | |
272 | struct sk_buff *skb) | |
273 | { | |
274 | struct ieee80211_wmm_param_ie *wmm; | |
275 | struct ieee80211_tx_queue_params *txq; | |
276 | int i; | |
277 | ||
b080db58 | 278 | wmm = skb_put_zero(skb, sizeof(*wmm)); |
6f7eaa47 AN |
279 | |
280 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; | |
281 | wmm->len = sizeof(*wmm) - 2; | |
282 | ||
283 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ | |
284 | wmm->oui[1] = 0x50; | |
285 | wmm->oui[2] = 0xf2; | |
286 | wmm->oui_type = 2; /* WME */ | |
287 | wmm->oui_subtype = 1; /* WME param */ | |
288 | wmm->version = 1; /* WME ver */ | |
289 | wmm->qos_info = 0; /* U-APSD not in use */ | |
290 | ||
291 | /* | |
292 | * Use the EDCA parameters defined for the BSS, or default if the AP | |
293 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 | |
294 | */ | |
295 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
296 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; | |
297 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, | |
298 | txq->acm, i); | |
299 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); | |
300 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); | |
301 | } | |
302 | } | |
303 | ||
0fabfaaf AN |
304 | static void |
305 | ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata, | |
306 | struct sta_info *sta) | |
307 | { | |
308 | /* IEEE802.11ac-2013 Table E-4 */ | |
309 | u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 }; | |
310 | struct cfg80211_chan_def uc = sta->tdls_chandef; | |
59021c67 | 311 | enum nl80211_chan_width max_width = ieee80211_sta_cap_chan_bw(sta); |
0fabfaaf AN |
312 | int i; |
313 | ||
314 | /* only support upgrading non-narrow channels up to 80Mhz */ | |
315 | if (max_width == NL80211_CHAN_WIDTH_5 || | |
316 | max_width == NL80211_CHAN_WIDTH_10) | |
317 | return; | |
318 | ||
319 | if (max_width > NL80211_CHAN_WIDTH_80) | |
320 | max_width = NL80211_CHAN_WIDTH_80; | |
321 | ||
4b559ec0 | 322 | if (uc.width >= max_width) |
0fabfaaf AN |
323 | return; |
324 | /* | |
325 | * Channel usage constrains in the IEEE802.11ac-2013 specification only | |
326 | * allow expanding a 20MHz channel to 80MHz in a single way. In | |
327 | * addition, there are no 40MHz allowed channels that are not part of | |
328 | * the allowed 80MHz range in the 5GHz spectrum (the relevant one here). | |
329 | */ | |
330 | for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++) | |
331 | if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) { | |
332 | uc.center_freq1 = centers_80mhz[i]; | |
4b559ec0 | 333 | uc.center_freq2 = 0; |
0fabfaaf AN |
334 | uc.width = NL80211_CHAN_WIDTH_80; |
335 | break; | |
336 | } | |
337 | ||
338 | if (!uc.center_freq1) | |
339 | return; | |
340 | ||
554d072e | 341 | /* proceed to downgrade the chandef until usable or the same as AP BW */ |
db8d9977 | 342 | while (uc.width > max_width || |
554d072e AN |
343 | (uc.width > sta->tdls_chandef.width && |
344 | !cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc, | |
345 | sdata->wdev.iftype))) | |
0fabfaaf AN |
346 | ieee80211_chandef_downgrade(&uc); |
347 | ||
348 | if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) { | |
349 | tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n", | |
350 | sta->tdls_chandef.width, uc.width); | |
351 | ||
352 | /* | |
353 | * the station is not yet authorized when BW upgrade is done, | |
354 | * locking is not required | |
355 | */ | |
356 | sta->tdls_chandef = uc; | |
357 | } | |
358 | } | |
359 | ||
f09a87d2 AN |
360 | static void |
361 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, | |
362 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
363 | u8 action_code, bool initiator, |
364 | const u8 *extra_ies, size_t extra_ies_len) | |
f09a87d2 | 365 | { |
13cc8a4a | 366 | struct ieee80211_supported_band *sband; |
21a8e9dd | 367 | struct ieee80211_local *local = sdata->local; |
13cc8a4a | 368 | struct ieee80211_sta_ht_cap ht_cap; |
fb28ec0c | 369 | struct ieee80211_sta_vht_cap vht_cap; |
13cc8a4a | 370 | struct sta_info *sta = NULL; |
f09a87d2 AN |
371 | size_t offset = 0, noffset; |
372 | u8 *pos; | |
373 | ||
21a8e9dd MSS |
374 | sband = ieee80211_get_sband(sdata); |
375 | if (!sband) | |
376 | return; | |
377 | ||
378 | ieee80211_add_srates_ie(sdata, skb, false, sband->band); | |
379 | ieee80211_add_ext_srates_ie(sdata, skb, false, sband->band); | |
f0d29cb9 | 380 | ieee80211_tdls_add_supp_channels(sdata, skb); |
f09a87d2 AN |
381 | |
382 | /* add any custom IEs that go before Extended Capabilities */ | |
383 | if (extra_ies_len) { | |
384 | static const u8 before_ext_cap[] = { | |
385 | WLAN_EID_SUPP_RATES, | |
386 | WLAN_EID_COUNTRY, | |
387 | WLAN_EID_EXT_SUPP_RATES, | |
388 | WLAN_EID_SUPPORTED_CHANNELS, | |
389 | WLAN_EID_RSN, | |
390 | }; | |
391 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
392 | before_ext_cap, | |
393 | ARRAY_SIZE(before_ext_cap), | |
394 | offset); | |
b952f4df | 395 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
f09a87d2 AN |
396 | offset = noffset; |
397 | } | |
398 | ||
b98fb44f | 399 | ieee80211_tdls_add_ext_capab(sdata, skb); |
f09a87d2 | 400 | |
40b861a0 AN |
401 | /* add the QoS element if we support it */ |
402 | if (local->hw.queues >= IEEE80211_NUM_ACS && | |
403 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) | |
404 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ | |
405 | ||
f09a87d2 AN |
406 | /* add any custom IEs that go before HT capabilities */ |
407 | if (extra_ies_len) { | |
408 | static const u8 before_ht_cap[] = { | |
409 | WLAN_EID_SUPP_RATES, | |
410 | WLAN_EID_COUNTRY, | |
411 | WLAN_EID_EXT_SUPP_RATES, | |
412 | WLAN_EID_SUPPORTED_CHANNELS, | |
413 | WLAN_EID_RSN, | |
414 | WLAN_EID_EXT_CAPABILITY, | |
415 | WLAN_EID_QOS_CAPA, | |
416 | WLAN_EID_FAST_BSS_TRANSITION, | |
417 | WLAN_EID_TIMEOUT_INTERVAL, | |
418 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
419 | }; | |
420 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
421 | before_ht_cap, | |
422 | ARRAY_SIZE(before_ht_cap), | |
423 | offset); | |
b952f4df | 424 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
f09a87d2 AN |
425 | offset = noffset; |
426 | } | |
427 | ||
0fabfaaf | 428 | mutex_lock(&local->sta_mtx); |
ae2e9fba AN |
429 | |
430 | /* we should have the peer STA if we're already responding */ | |
431 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { | |
432 | sta = sta_info_get(sdata, peer); | |
433 | if (WARN_ON_ONCE(!sta)) { | |
0fabfaaf | 434 | mutex_unlock(&local->sta_mtx); |
ae2e9fba AN |
435 | return; |
436 | } | |
0fabfaaf AN |
437 | |
438 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; | |
ae2e9fba AN |
439 | } |
440 | ||
a38700dd AN |
441 | ieee80211_tdls_add_oper_classes(sdata, skb); |
442 | ||
13cc8a4a AN |
443 | /* |
444 | * with TDLS we can switch channels, and HT-caps are not necessarily | |
445 | * the same on all bands. The specification limits the setup to a | |
446 | * single HT-cap, so use the current band for now. | |
447 | */ | |
13cc8a4a | 448 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); |
c5309ba7 | 449 | |
070e176a AN |
450 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
451 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
452 | ht_cap.ht_supported) { | |
c5309ba7 JB |
453 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
454 | ||
455 | /* disable SMPS in TDLS initiator */ | |
456 | ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED | |
457 | << IEEE80211_HT_CAP_SM_PS_SHIFT; | |
458 | ||
459 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
460 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
461 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
462 | ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
c5309ba7 JB |
463 | /* the peer caps are already intersected with our own */ |
464 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); | |
13cc8a4a AN |
465 | |
466 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
467 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
468 | } | |
469 | ||
2cedd879 AN |
470 | if (ht_cap.ht_supported && |
471 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
472 | ieee80211_tdls_add_bss_coex_ie(skb); | |
473 | ||
fb28ec0c AN |
474 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
475 | ||
476 | /* add any custom IEs that go before VHT capabilities */ | |
477 | if (extra_ies_len) { | |
478 | static const u8 before_vht_cap[] = { | |
479 | WLAN_EID_SUPP_RATES, | |
480 | WLAN_EID_COUNTRY, | |
481 | WLAN_EID_EXT_SUPP_RATES, | |
482 | WLAN_EID_SUPPORTED_CHANNELS, | |
483 | WLAN_EID_RSN, | |
484 | WLAN_EID_EXT_CAPABILITY, | |
485 | WLAN_EID_QOS_CAPA, | |
486 | WLAN_EID_FAST_BSS_TRANSITION, | |
487 | WLAN_EID_TIMEOUT_INTERVAL, | |
488 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
489 | WLAN_EID_MULTI_BAND, | |
490 | }; | |
491 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
492 | before_vht_cap, | |
493 | ARRAY_SIZE(before_vht_cap), | |
494 | offset); | |
b952f4df | 495 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
fb28ec0c AN |
496 | offset = noffset; |
497 | } | |
498 | ||
499 | /* build the VHT-cap similarly to the HT-cap */ | |
500 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
070e176a AN |
501 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
502 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
503 | vht_cap.vht_supported) { | |
fb28ec0c AN |
504 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
505 | ||
506 | /* the AID is present only when VHT is implemented */ | |
070e176a AN |
507 | if (action_code == WLAN_TDLS_SETUP_REQUEST) |
508 | ieee80211_tdls_add_aid(sdata, skb); | |
fb28ec0c AN |
509 | |
510 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
511 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
512 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
513 | vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) { | |
514 | /* the peer caps are already intersected with our own */ | |
515 | memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap)); | |
516 | ||
517 | /* the AID is present only when VHT is implemented */ | |
518 | ieee80211_tdls_add_aid(sdata, skb); | |
519 | ||
520 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
521 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
0fabfaaf AN |
522 | |
523 | /* | |
524 | * if both peers support WIDER_BW, we can expand the chandef to | |
525 | * a wider compatible one, up to 80MHz | |
526 | */ | |
527 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
528 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
fb28ec0c AN |
529 | } |
530 | ||
0fabfaaf | 531 | mutex_unlock(&local->sta_mtx); |
fb28ec0c | 532 | |
f09a87d2 AN |
533 | /* add any remaining IEs */ |
534 | if (extra_ies_len) { | |
535 | noffset = extra_ies_len; | |
b952f4df | 536 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
f09a87d2 | 537 | } |
1606ef4a | 538 | |
f09a87d2 AN |
539 | } |
540 | ||
6f7eaa47 AN |
541 | static void |
542 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, | |
543 | struct sk_buff *skb, const u8 *peer, | |
544 | bool initiator, const u8 *extra_ies, | |
545 | size_t extra_ies_len) | |
546 | { | |
547 | struct ieee80211_local *local = sdata->local; | |
13cc8a4a | 548 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6f7eaa47 | 549 | size_t offset = 0, noffset; |
13cc8a4a | 550 | struct sta_info *sta, *ap_sta; |
21a8e9dd | 551 | struct ieee80211_supported_band *sband; |
6f7eaa47 AN |
552 | u8 *pos; |
553 | ||
21a8e9dd MSS |
554 | sband = ieee80211_get_sband(sdata); |
555 | if (!sband) | |
556 | return; | |
557 | ||
0fabfaaf | 558 | mutex_lock(&local->sta_mtx); |
6f7eaa47 AN |
559 | |
560 | sta = sta_info_get(sdata, peer); | |
13cc8a4a AN |
561 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
562 | if (WARN_ON_ONCE(!sta || !ap_sta)) { | |
0fabfaaf | 563 | mutex_unlock(&local->sta_mtx); |
6f7eaa47 AN |
564 | return; |
565 | } | |
566 | ||
0fabfaaf AN |
567 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; |
568 | ||
6f7eaa47 AN |
569 | /* add any custom IEs that go before the QoS IE */ |
570 | if (extra_ies_len) { | |
571 | static const u8 before_qos[] = { | |
572 | WLAN_EID_RSN, | |
573 | }; | |
574 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
575 | before_qos, | |
576 | ARRAY_SIZE(before_qos), | |
577 | offset); | |
b952f4df | 578 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
6f7eaa47 AN |
579 | offset = noffset; |
580 | } | |
581 | ||
582 | /* add the QoS param IE if both the peer and we support it */ | |
a74a8c84 | 583 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
6f7eaa47 AN |
584 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
585 | ||
13cc8a4a AN |
586 | /* add any custom IEs that go before HT operation */ |
587 | if (extra_ies_len) { | |
588 | static const u8 before_ht_op[] = { | |
589 | WLAN_EID_RSN, | |
590 | WLAN_EID_QOS_CAPA, | |
591 | WLAN_EID_FAST_BSS_TRANSITION, | |
592 | WLAN_EID_TIMEOUT_INTERVAL, | |
593 | }; | |
594 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
595 | before_ht_op, | |
596 | ARRAY_SIZE(before_ht_op), | |
597 | offset); | |
b952f4df | 598 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
13cc8a4a AN |
599 | offset = noffset; |
600 | } | |
601 | ||
57f255f5 AN |
602 | /* |
603 | * if HT support is only added in TDLS, we need an HT-operation IE. | |
604 | * add the IE as required by IEEE802.11-2012 9.23.3.2. | |
605 | */ | |
13cc8a4a | 606 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { |
57f255f5 AN |
607 | u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
608 | IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT | | |
609 | IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT; | |
610 | ||
890b7878 | 611 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
890b7878 | 612 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, |
57f255f5 AN |
613 | &sdata->vif.bss_conf.chandef, prot, |
614 | true); | |
13cc8a4a AN |
615 | } |
616 | ||
fb28ec0c AN |
617 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
618 | ||
619 | /* only include VHT-operation if not on the 2.4GHz band */ | |
21a8e9dd MSS |
620 | if (sband->band != NL80211_BAND_2GHZ && |
621 | sta->sta.vht_cap.vht_supported) { | |
0fabfaaf AN |
622 | /* |
623 | * if both peers support WIDER_BW, we can expand the chandef to | |
624 | * a wider compatible one, up to 80MHz | |
625 | */ | |
626 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
627 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
628 | ||
890b7878 AN |
629 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); |
630 | ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap, | |
0fabfaaf | 631 | &sta->tdls_chandef); |
fb28ec0c AN |
632 | } |
633 | ||
0fabfaaf | 634 | mutex_unlock(&local->sta_mtx); |
13cc8a4a | 635 | |
6f7eaa47 AN |
636 | /* add any remaining IEs */ |
637 | if (extra_ies_len) { | |
638 | noffset = extra_ies_len; | |
b952f4df | 639 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
6f7eaa47 | 640 | } |
6f7eaa47 AN |
641 | } |
642 | ||
a7a6bdd0 AN |
643 | static void |
644 | ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, | |
645 | struct sk_buff *skb, const u8 *peer, | |
646 | bool initiator, const u8 *extra_ies, | |
647 | size_t extra_ies_len, u8 oper_class, | |
648 | struct cfg80211_chan_def *chandef) | |
649 | { | |
650 | struct ieee80211_tdls_data *tf; | |
651 | size_t offset = 0, noffset; | |
a7a6bdd0 AN |
652 | |
653 | if (WARN_ON_ONCE(!chandef)) | |
654 | return; | |
655 | ||
656 | tf = (void *)skb->data; | |
657 | tf->u.chan_switch_req.target_channel = | |
658 | ieee80211_frequency_to_channel(chandef->chan->center_freq); | |
659 | tf->u.chan_switch_req.oper_class = oper_class; | |
660 | ||
661 | if (extra_ies_len) { | |
662 | static const u8 before_lnkie[] = { | |
663 | WLAN_EID_SECONDARY_CHANNEL_OFFSET, | |
664 | }; | |
665 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
666 | before_lnkie, | |
667 | ARRAY_SIZE(before_lnkie), | |
668 | offset); | |
b952f4df | 669 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
a7a6bdd0 AN |
670 | offset = noffset; |
671 | } | |
672 | ||
673 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
674 | ||
675 | /* add any remaining IEs */ | |
676 | if (extra_ies_len) { | |
677 | noffset = extra_ies_len; | |
b952f4df | 678 | skb_put_data(skb, extra_ies + offset, noffset - offset); |
a7a6bdd0 AN |
679 | } |
680 | } | |
681 | ||
8a4d32f3 AN |
682 | static void |
683 | ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, | |
684 | struct sk_buff *skb, const u8 *peer, | |
685 | u16 status_code, bool initiator, | |
686 | const u8 *extra_ies, | |
687 | size_t extra_ies_len) | |
688 | { | |
689 | if (status_code == 0) | |
690 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
691 | ||
692 | if (extra_ies_len) | |
59ae1d12 | 693 | skb_put_data(skb, extra_ies, extra_ies_len); |
8a4d32f3 AN |
694 | } |
695 | ||
46792a2d AN |
696 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
697 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
698 | u8 action_code, u16 status_code, |
699 | bool initiator, const u8 *extra_ies, | |
c2733905 AN |
700 | size_t extra_ies_len, u8 oper_class, |
701 | struct cfg80211_chan_def *chandef) | |
46792a2d | 702 | { |
46792a2d AN |
703 | switch (action_code) { |
704 | case WLAN_TDLS_SETUP_REQUEST: | |
705 | case WLAN_TDLS_SETUP_RESPONSE: | |
706 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
1606ef4a AN |
707 | if (status_code == 0) |
708 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, | |
709 | action_code, | |
710 | initiator, | |
711 | extra_ies, | |
712 | extra_ies_len); | |
46792a2d AN |
713 | break; |
714 | case WLAN_TDLS_SETUP_CONFIRM: | |
6f7eaa47 AN |
715 | if (status_code == 0) |
716 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, | |
717 | initiator, extra_ies, | |
718 | extra_ies_len); | |
719 | break; | |
46792a2d AN |
720 | case WLAN_TDLS_TEARDOWN: |
721 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
f09a87d2 | 722 | if (extra_ies_len) |
59ae1d12 | 723 | skb_put_data(skb, extra_ies, extra_ies_len); |
1606ef4a AN |
724 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
725 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
46792a2d | 726 | break; |
a7a6bdd0 AN |
727 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
728 | ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer, | |
729 | initiator, extra_ies, | |
730 | extra_ies_len, | |
731 | oper_class, chandef); | |
732 | break; | |
8a4d32f3 AN |
733 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
734 | ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer, | |
735 | status_code, | |
736 | initiator, extra_ies, | |
737 | extra_ies_len); | |
738 | break; | |
46792a2d AN |
739 | } |
740 | ||
46792a2d AN |
741 | } |
742 | ||
95224fe8 AN |
743 | static int |
744 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 745 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
746 | u16 status_code, struct sk_buff *skb) |
747 | { | |
748 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
749 | struct ieee80211_tdls_data *tf; |
750 | ||
4df864c1 | 751 | tf = skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); |
95224fe8 AN |
752 | |
753 | memcpy(tf->da, peer, ETH_ALEN); | |
754 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); | |
755 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); | |
756 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; | |
757 | ||
59cd85cb AN |
758 | /* network header is after the ethernet header */ |
759 | skb_set_network_header(skb, ETH_HLEN); | |
760 | ||
95224fe8 AN |
761 | switch (action_code) { |
762 | case WLAN_TDLS_SETUP_REQUEST: | |
763 | tf->category = WLAN_CATEGORY_TDLS; | |
764 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; | |
765 | ||
766 | skb_put(skb, sizeof(tf->u.setup_req)); | |
767 | tf->u.setup_req.dialog_token = dialog_token; | |
768 | tf->u.setup_req.capability = | |
dd8c0b03 AN |
769 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
770 | status_code)); | |
95224fe8 AN |
771 | break; |
772 | case WLAN_TDLS_SETUP_RESPONSE: | |
773 | tf->category = WLAN_CATEGORY_TDLS; | |
774 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; | |
775 | ||
776 | skb_put(skb, sizeof(tf->u.setup_resp)); | |
777 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); | |
778 | tf->u.setup_resp.dialog_token = dialog_token; | |
779 | tf->u.setup_resp.capability = | |
dd8c0b03 AN |
780 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
781 | status_code)); | |
95224fe8 AN |
782 | break; |
783 | case WLAN_TDLS_SETUP_CONFIRM: | |
784 | tf->category = WLAN_CATEGORY_TDLS; | |
785 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; | |
786 | ||
787 | skb_put(skb, sizeof(tf->u.setup_cfm)); | |
788 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); | |
789 | tf->u.setup_cfm.dialog_token = dialog_token; | |
790 | break; | |
791 | case WLAN_TDLS_TEARDOWN: | |
792 | tf->category = WLAN_CATEGORY_TDLS; | |
793 | tf->action_code = WLAN_TDLS_TEARDOWN; | |
794 | ||
795 | skb_put(skb, sizeof(tf->u.teardown)); | |
796 | tf->u.teardown.reason_code = cpu_to_le16(status_code); | |
797 | break; | |
798 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
799 | tf->category = WLAN_CATEGORY_TDLS; | |
800 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; | |
801 | ||
802 | skb_put(skb, sizeof(tf->u.discover_req)); | |
803 | tf->u.discover_req.dialog_token = dialog_token; | |
804 | break; | |
a7a6bdd0 AN |
805 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
806 | tf->category = WLAN_CATEGORY_TDLS; | |
807 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
808 | ||
809 | skb_put(skb, sizeof(tf->u.chan_switch_req)); | |
810 | break; | |
8a4d32f3 AN |
811 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
812 | tf->category = WLAN_CATEGORY_TDLS; | |
813 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
814 | ||
815 | skb_put(skb, sizeof(tf->u.chan_switch_resp)); | |
816 | tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code); | |
817 | break; | |
95224fe8 AN |
818 | default: |
819 | return -EINVAL; | |
820 | } | |
821 | ||
822 | return 0; | |
823 | } | |
824 | ||
825 | static int | |
826 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 827 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
828 | u16 status_code, struct sk_buff *skb) |
829 | { | |
830 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
831 | struct ieee80211_mgmt *mgmt; |
832 | ||
b080db58 | 833 | mgmt = skb_put_zero(skb, 24); |
95224fe8 AN |
834 | memcpy(mgmt->da, peer, ETH_ALEN); |
835 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
836 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
837 | ||
838 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
839 | IEEE80211_STYPE_ACTION); | |
840 | ||
841 | switch (action_code) { | |
842 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
843 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); | |
844 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; | |
845 | mgmt->u.action.u.tdls_discover_resp.action_code = | |
846 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; | |
847 | mgmt->u.action.u.tdls_discover_resp.dialog_token = | |
848 | dialog_token; | |
849 | mgmt->u.action.u.tdls_discover_resp.capability = | |
dd8c0b03 AN |
850 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
851 | status_code)); | |
95224fe8 AN |
852 | break; |
853 | default: | |
854 | return -EINVAL; | |
855 | } | |
856 | ||
857 | return 0; | |
858 | } | |
859 | ||
c2733905 AN |
860 | static struct sk_buff * |
861 | ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata, | |
862 | const u8 *peer, u8 action_code, | |
863 | u8 dialog_token, u16 status_code, | |
864 | bool initiator, const u8 *extra_ies, | |
865 | size_t extra_ies_len, u8 oper_class, | |
866 | struct cfg80211_chan_def *chandef) | |
95224fe8 | 867 | { |
95224fe8 | 868 | struct ieee80211_local *local = sdata->local; |
c2733905 | 869 | struct sk_buff *skb; |
95224fe8 AN |
870 | int ret; |
871 | ||
c2733905 | 872 | skb = netdev_alloc_skb(sdata->dev, |
1277b4a9 LK |
873 | local->hw.extra_tx_headroom + |
874 | max(sizeof(struct ieee80211_mgmt), | |
875 | sizeof(struct ieee80211_tdls_data)) + | |
876 | 50 + /* supported rates */ | |
b98fb44f | 877 | 10 + /* ext capab */ |
1277b4a9 LK |
878 | 26 + /* max(WMM-info, WMM-param) */ |
879 | 2 + max(sizeof(struct ieee80211_ht_cap), | |
880 | sizeof(struct ieee80211_ht_operation)) + | |
fb28ec0c AN |
881 | 2 + max(sizeof(struct ieee80211_vht_cap), |
882 | sizeof(struct ieee80211_vht_operation)) + | |
f0d29cb9 | 883 | 50 + /* supported channels */ |
2cedd879 | 884 | 3 + /* 40/20 BSS coex */ |
fb28ec0c | 885 | 4 + /* AID */ |
a38700dd | 886 | 4 + /* oper classes */ |
1277b4a9 LK |
887 | extra_ies_len + |
888 | sizeof(struct ieee80211_tdls_lnkie)); | |
95224fe8 | 889 | if (!skb) |
c2733905 | 890 | return NULL; |
95224fe8 AN |
891 | |
892 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
893 | ||
894 | switch (action_code) { | |
895 | case WLAN_TDLS_SETUP_REQUEST: | |
896 | case WLAN_TDLS_SETUP_RESPONSE: | |
897 | case WLAN_TDLS_SETUP_CONFIRM: | |
898 | case WLAN_TDLS_TEARDOWN: | |
899 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
a7a6bdd0 | 900 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 901 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
c2733905 AN |
902 | ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy, |
903 | sdata->dev, peer, | |
95224fe8 AN |
904 | action_code, dialog_token, |
905 | status_code, skb); | |
95224fe8 AN |
906 | break; |
907 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
c2733905 AN |
908 | ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev, |
909 | peer, action_code, | |
95224fe8 AN |
910 | dialog_token, status_code, |
911 | skb); | |
95224fe8 AN |
912 | break; |
913 | default: | |
914 | ret = -ENOTSUPP; | |
915 | break; | |
916 | } | |
917 | ||
918 | if (ret < 0) | |
919 | goto fail; | |
920 | ||
c2733905 AN |
921 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
922 | initiator, extra_ies, extra_ies_len, oper_class, | |
923 | chandef); | |
924 | return skb; | |
925 | ||
926 | fail: | |
927 | dev_kfree_skb(skb); | |
928 | return NULL; | |
929 | } | |
930 | ||
931 | static int | |
932 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, | |
933 | const u8 *peer, u8 action_code, u8 dialog_token, | |
934 | u16 status_code, u32 peer_capability, | |
935 | bool initiator, const u8 *extra_ies, | |
936 | size_t extra_ies_len, u8 oper_class, | |
937 | struct cfg80211_chan_def *chandef) | |
938 | { | |
939 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
940 | struct sk_buff *skb = NULL; | |
941 | struct sta_info *sta; | |
942 | u32 flags = 0; | |
943 | int ret = 0; | |
944 | ||
626911cc AN |
945 | rcu_read_lock(); |
946 | sta = sta_info_get(sdata, peer); | |
947 | ||
948 | /* infer the initiator if we can, to support old userspace */ | |
95224fe8 AN |
949 | switch (action_code) { |
950 | case WLAN_TDLS_SETUP_REQUEST: | |
8b94148c | 951 | if (sta) { |
626911cc | 952 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
953 | sta->sta.tdls_initiator = false; |
954 | } | |
fc0561dc | 955 | fallthrough; |
95224fe8 | 956 | case WLAN_TDLS_SETUP_CONFIRM: |
95224fe8 | 957 | case WLAN_TDLS_DISCOVERY_REQUEST: |
626911cc | 958 | initiator = true; |
95224fe8 AN |
959 | break; |
960 | case WLAN_TDLS_SETUP_RESPONSE: | |
626911cc AN |
961 | /* |
962 | * In some testing scenarios, we send a request and response. | |
963 | * Make the last packet sent take effect for the initiator | |
964 | * value. | |
965 | */ | |
8b94148c | 966 | if (sta) { |
626911cc | 967 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
968 | sta->sta.tdls_initiator = true; |
969 | } | |
fc0561dc | 970 | fallthrough; |
95224fe8 | 971 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
626911cc | 972 | initiator = false; |
2fb6b9b8 AN |
973 | break; |
974 | case WLAN_TDLS_TEARDOWN: | |
a7a6bdd0 | 975 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 976 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
2fb6b9b8 | 977 | /* any value is ok */ |
95224fe8 AN |
978 | break; |
979 | default: | |
980 | ret = -ENOTSUPP; | |
626911cc | 981 | break; |
95224fe8 AN |
982 | } |
983 | ||
46792a2d AN |
984 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
985 | initiator = true; | |
2fb6b9b8 | 986 | |
626911cc AN |
987 | rcu_read_unlock(); |
988 | if (ret < 0) | |
989 | goto fail; | |
990 | ||
c2733905 AN |
991 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code, |
992 | dialog_token, status_code, | |
993 | initiator, extra_ies, | |
994 | extra_ies_len, oper_class, | |
995 | chandef); | |
996 | if (!skb) { | |
997 | ret = -EINVAL; | |
998 | goto fail; | |
999 | } | |
1000 | ||
1001 | if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { | |
95224fe8 AN |
1002 | ieee80211_tx_skb(sdata, skb); |
1003 | return 0; | |
1004 | } | |
1005 | ||
1006 | /* | |
1007 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise | |
1008 | * we should default to AC_VI. | |
1009 | */ | |
1010 | switch (action_code) { | |
1011 | case WLAN_TDLS_SETUP_REQUEST: | |
1012 | case WLAN_TDLS_SETUP_RESPONSE: | |
cb59bc14 | 1013 | skb->priority = 256 + 2; |
95224fe8 AN |
1014 | break; |
1015 | default: | |
cb59bc14 | 1016 | skb->priority = 256 + 5; |
95224fe8 AN |
1017 | break; |
1018 | } | |
cb59bc14 | 1019 | skb_set_queue_mapping(skb, ieee80211_select_queue(sdata, skb)); |
95224fe8 | 1020 | |
1277b4a9 LK |
1021 | /* |
1022 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. | |
1023 | * Later, if no ACK is returned from peer, we will re-send the teardown | |
1024 | * packet through the AP. | |
1025 | */ | |
1026 | if ((action_code == WLAN_TDLS_TEARDOWN) && | |
30686bf7 | 1027 | ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
1277b4a9 LK |
1028 | bool try_resend; /* Should we keep skb for possible resend */ |
1029 | ||
1030 | /* If not sending directly to peer - no point in keeping skb */ | |
1031 | rcu_read_lock(); | |
1032 | sta = sta_info_get(sdata, peer); | |
1033 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1034 | rcu_read_unlock(); | |
1035 | ||
1036 | spin_lock_bh(&sdata->u.mgd.teardown_lock); | |
1037 | if (try_resend && !sdata->u.mgd.teardown_skb) { | |
1038 | /* Mark it as requiring TX status callback */ | |
1039 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1040 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
1041 | ||
1042 | /* | |
1043 | * skb is copied since mac80211 will later set | |
1044 | * properties that might not be the same as the AP, | |
1045 | * such as encryption, QoS, addresses, etc. | |
1046 | * | |
1047 | * No problem if skb_copy() fails, so no need to check. | |
1048 | */ | |
1049 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); | |
1050 | sdata->u.mgd.orig_teardown_skb = skb; | |
1051 | } | |
1052 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); | |
1053 | } | |
1054 | ||
95224fe8 AN |
1055 | /* disable bottom halves when entering the Tx path */ |
1056 | local_bh_disable(); | |
a7528198 | 1057 | __ieee80211_subif_start_xmit(skb, dev, flags, 0, NULL); |
95224fe8 AN |
1058 | local_bh_enable(); |
1059 | ||
1060 | return ret; | |
1061 | ||
1062 | fail: | |
1063 | dev_kfree_skb(skb); | |
1064 | return ret; | |
1065 | } | |
1066 | ||
191dd469 AN |
1067 | static int |
1068 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, | |
1069 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1070 | u16 status_code, u32 peer_capability, bool initiator, | |
1071 | const u8 *extra_ies, size_t extra_ies_len) | |
17e6a59a AN |
1072 | { |
1073 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1074 | struct ieee80211_local *local = sdata->local; | |
d51c2ea3 | 1075 | enum ieee80211_smps_mode smps_mode = sdata->u.mgd.driver_smps_mode; |
17e6a59a AN |
1076 | int ret; |
1077 | ||
d51c2ea3 AN |
1078 | /* don't support setup with forced SMPS mode that's not off */ |
1079 | if (smps_mode != IEEE80211_SMPS_AUTOMATIC && | |
1080 | smps_mode != IEEE80211_SMPS_OFF) { | |
1081 | tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n", | |
1082 | smps_mode); | |
1083 | return -ENOTSUPP; | |
1084 | } | |
1085 | ||
17e6a59a AN |
1086 | mutex_lock(&local->mtx); |
1087 | ||
1088 | /* we don't support concurrent TDLS peer setups */ | |
81dd2b88 AN |
1089 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
1090 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { | |
17e6a59a | 1091 | ret = -EBUSY; |
ae2e9fba | 1092 | goto out_unlock; |
17e6a59a AN |
1093 | } |
1094 | ||
7adc3e46 AN |
1095 | /* |
1096 | * make sure we have a STA representing the peer so we drop or buffer | |
1097 | * non-TDLS-setup frames to the peer. We can't send other packets | |
6ae32e5d AN |
1098 | * during setup through the AP path. |
1099 | * Allow error packets to be sent - sometimes we don't even add a STA | |
1100 | * before failing the setup. | |
7adc3e46 | 1101 | */ |
6ae32e5d AN |
1102 | if (status_code == 0) { |
1103 | rcu_read_lock(); | |
1104 | if (!sta_info_get(sdata, peer)) { | |
1105 | rcu_read_unlock(); | |
1106 | ret = -ENOLINK; | |
ae2e9fba | 1107 | goto out_unlock; |
6ae32e5d | 1108 | } |
7adc3e46 | 1109 | rcu_read_unlock(); |
7adc3e46 | 1110 | } |
7adc3e46 | 1111 | |
3b24f4c6 | 1112 | ieee80211_flush_queues(local, sdata, false); |
ae2e9fba AN |
1113 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
1114 | mutex_unlock(&local->mtx); | |
db67d661 | 1115 | |
ae2e9fba | 1116 | /* we cannot take the mutex while preparing the setup packet */ |
17e6a59a AN |
1117 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
1118 | dialog_token, status_code, | |
2fb6b9b8 | 1119 | peer_capability, initiator, |
c2733905 AN |
1120 | extra_ies, extra_ies_len, 0, |
1121 | NULL); | |
ae2e9fba AN |
1122 | if (ret < 0) { |
1123 | mutex_lock(&local->mtx); | |
1124 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
1125 | mutex_unlock(&local->mtx); | |
1126 | return ret; | |
1127 | } | |
17e6a59a | 1128 | |
191dd469 | 1129 | ieee80211_queue_delayed_work(&sdata->local->hw, |
81dd2b88 | 1130 | &sdata->u.mgd.tdls_peer_del_work, |
191dd469 | 1131 | TDLS_PEER_SETUP_TIMEOUT); |
ae2e9fba | 1132 | return 0; |
17e6a59a | 1133 | |
ae2e9fba | 1134 | out_unlock: |
17e6a59a | 1135 | mutex_unlock(&local->mtx); |
191dd469 AN |
1136 | return ret; |
1137 | } | |
1138 | ||
db67d661 AN |
1139 | static int |
1140 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, | |
1141 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1142 | u16 status_code, u32 peer_capability, | |
1143 | bool initiator, const u8 *extra_ies, | |
1144 | size_t extra_ies_len) | |
1145 | { | |
1146 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1147 | struct ieee80211_local *local = sdata->local; | |
1148 | struct sta_info *sta; | |
1149 | int ret; | |
1150 | ||
1151 | /* | |
1152 | * No packets can be transmitted to the peer via the AP during setup - | |
1153 | * the STA is set as a TDLS peer, but is not authorized. | |
1154 | * During teardown, we prevent direct transmissions by stopping the | |
1155 | * queues and flushing all direct packets. | |
1156 | */ | |
1157 | ieee80211_stop_vif_queues(local, sdata, | |
1158 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
3b24f4c6 | 1159 | ieee80211_flush_queues(local, sdata, false); |
db67d661 AN |
1160 | |
1161 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, | |
1162 | dialog_token, status_code, | |
1163 | peer_capability, initiator, | |
c2733905 AN |
1164 | extra_ies, extra_ies_len, 0, |
1165 | NULL); | |
db67d661 AN |
1166 | if (ret < 0) |
1167 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", | |
1168 | ret); | |
1169 | ||
1170 | /* | |
1171 | * Remove the STA AUTH flag to force further traffic through the AP. If | |
1172 | * the STA was unreachable, it was already removed. | |
1173 | */ | |
1174 | rcu_read_lock(); | |
1175 | sta = sta_info_get(sdata, peer); | |
1176 | if (sta) | |
1177 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1178 | rcu_read_unlock(); | |
1179 | ||
1180 | ieee80211_wake_vif_queues(local, sdata, | |
1181 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
1182 | ||
1183 | return 0; | |
1184 | } | |
1185 | ||
191dd469 AN |
1186 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
1187 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1188 | u16 status_code, u32 peer_capability, | |
1189 | bool initiator, const u8 *extra_ies, | |
1190 | size_t extra_ies_len) | |
1191 | { | |
1192 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1193 | int ret; | |
1194 | ||
1195 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1196 | return -ENOTSUPP; | |
1197 | ||
1198 | /* make sure we are in managed mode, and associated */ | |
1199 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
1200 | !sdata->u.mgd.associated) | |
1201 | return -EINVAL; | |
1202 | ||
1203 | switch (action_code) { | |
1204 | case WLAN_TDLS_SETUP_REQUEST: | |
1205 | case WLAN_TDLS_SETUP_RESPONSE: | |
1206 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, | |
1207 | dialog_token, status_code, | |
1208 | peer_capability, initiator, | |
1209 | extra_ies, extra_ies_len); | |
1210 | break; | |
1211 | case WLAN_TDLS_TEARDOWN: | |
db67d661 AN |
1212 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
1213 | action_code, dialog_token, | |
1214 | status_code, | |
1215 | peer_capability, initiator, | |
1216 | extra_ies, extra_ies_len); | |
1217 | break; | |
191dd469 | 1218 | case WLAN_TDLS_DISCOVERY_REQUEST: |
ee10f2c7 AN |
1219 | /* |
1220 | * Protect the discovery so we can hear the TDLS discovery | |
1221 | * response frame. It is transmitted directly and not buffered | |
1222 | * by the AP. | |
1223 | */ | |
1224 | drv_mgd_protect_tdls_discover(sdata->local, sdata); | |
fc0561dc | 1225 | fallthrough; |
ee10f2c7 | 1226 | case WLAN_TDLS_SETUP_CONFIRM: |
191dd469 AN |
1227 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
1228 | /* no special handling */ | |
1229 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, | |
1230 | action_code, | |
1231 | dialog_token, | |
1232 | status_code, | |
1233 | peer_capability, | |
1234 | initiator, extra_ies, | |
c2733905 | 1235 | extra_ies_len, 0, NULL); |
191dd469 AN |
1236 | break; |
1237 | default: | |
1238 | ret = -EOPNOTSUPP; | |
1239 | break; | |
1240 | } | |
17e6a59a AN |
1241 | |
1242 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", | |
1243 | action_code, peer, ret); | |
1244 | return ret; | |
1245 | } | |
1246 | ||
59021c67 AN |
1247 | static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata, |
1248 | struct sta_info *sta) | |
0fabfaaf AN |
1249 | { |
1250 | struct ieee80211_local *local = sdata->local; | |
1251 | struct ieee80211_chanctx_conf *conf; | |
1252 | struct ieee80211_chanctx *ctx; | |
59021c67 AN |
1253 | enum nl80211_chan_width width; |
1254 | struct ieee80211_supported_band *sband; | |
0fabfaaf AN |
1255 | |
1256 | mutex_lock(&local->chanctx_mtx); | |
1257 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1258 | lockdep_is_held(&local->chanctx_mtx)); | |
1259 | if (conf) { | |
59021c67 AN |
1260 | width = conf->def.width; |
1261 | sband = local->hw.wiphy->bands[conf->def.chan->band]; | |
0fabfaaf AN |
1262 | ctx = container_of(conf, struct ieee80211_chanctx, conf); |
1263 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
59021c67 AN |
1264 | |
1265 | /* if width changed and a peer is given, update its BW */ | |
1266 | if (width != conf->def.width && sta && | |
1267 | test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) { | |
1268 | enum ieee80211_sta_rx_bandwidth bw; | |
1269 | ||
1270 | bw = ieee80211_chan_width_to_rx_bw(conf->def.width); | |
1271 | bw = min(bw, ieee80211_sta_cap_rx_bw(sta)); | |
1272 | if (bw != sta->sta.bandwidth) { | |
1273 | sta->sta.bandwidth = bw; | |
1274 | rate_control_rate_update(local, sband, sta, | |
1275 | IEEE80211_RC_BW_CHANGED); | |
1276 | /* | |
1277 | * if a TDLS peer BW was updated, we need to | |
1278 | * recalc the chandef width again, to get the | |
1279 | * correct chanctx min_def | |
1280 | */ | |
1281 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1282 | } | |
1283 | } | |
1284 | ||
0fabfaaf AN |
1285 | } |
1286 | mutex_unlock(&local->chanctx_mtx); | |
1287 | } | |
1288 | ||
22f66895 AA |
1289 | static int iee80211_tdls_have_ht_peers(struct ieee80211_sub_if_data *sdata) |
1290 | { | |
1291 | struct sta_info *sta; | |
1292 | bool result = false; | |
1293 | ||
1294 | rcu_read_lock(); | |
1295 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1296 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1297 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
1298 | !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH) || | |
1299 | !sta->sta.ht_cap.ht_supported) | |
1300 | continue; | |
1301 | result = true; | |
1302 | break; | |
1303 | } | |
1304 | rcu_read_unlock(); | |
1305 | ||
1306 | return result; | |
1307 | } | |
1308 | ||
1309 | static void | |
1310 | iee80211_tdls_recalc_ht_protection(struct ieee80211_sub_if_data *sdata, | |
1311 | struct sta_info *sta) | |
1312 | { | |
1313 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1314 | bool tdls_ht; | |
1315 | u16 protection = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | | |
1316 | IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT | | |
1317 | IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT; | |
1318 | u16 opmode; | |
1319 | ||
1320 | /* Nothing to do if the BSS connection uses HT */ | |
1321 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) | |
1322 | return; | |
1323 | ||
1324 | tdls_ht = (sta && sta->sta.ht_cap.ht_supported) || | |
1325 | iee80211_tdls_have_ht_peers(sdata); | |
1326 | ||
1327 | opmode = sdata->vif.bss_conf.ht_operation_mode; | |
1328 | ||
1329 | if (tdls_ht) | |
1330 | opmode |= protection; | |
1331 | else | |
1332 | opmode &= ~protection; | |
1333 | ||
1334 | if (opmode == sdata->vif.bss_conf.ht_operation_mode) | |
1335 | return; | |
1336 | ||
1337 | sdata->vif.bss_conf.ht_operation_mode = opmode; | |
1338 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT); | |
1339 | } | |
1340 | ||
95224fe8 | 1341 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
3b3a0162 | 1342 | const u8 *peer, enum nl80211_tdls_operation oper) |
95224fe8 AN |
1343 | { |
1344 | struct sta_info *sta; | |
1345 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
17e6a59a AN |
1346 | struct ieee80211_local *local = sdata->local; |
1347 | int ret; | |
95224fe8 AN |
1348 | |
1349 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1350 | return -ENOTSUPP; | |
1351 | ||
1352 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1353 | return -EINVAL; | |
1354 | ||
17e6a59a AN |
1355 | switch (oper) { |
1356 | case NL80211_TDLS_ENABLE_LINK: | |
1357 | case NL80211_TDLS_DISABLE_LINK: | |
1358 | break; | |
1359 | case NL80211_TDLS_TEARDOWN: | |
1360 | case NL80211_TDLS_SETUP: | |
1361 | case NL80211_TDLS_DISCOVERY_REQ: | |
1362 | /* We don't support in-driver setup/teardown/discovery */ | |
1363 | return -ENOTSUPP; | |
1364 | } | |
1365 | ||
22f66895 AA |
1366 | /* protect possible bss_conf changes and avoid concurrency in |
1367 | * ieee80211_bss_info_change_notify() | |
1368 | */ | |
1369 | sdata_lock(sdata); | |
17e6a59a | 1370 | mutex_lock(&local->mtx); |
95224fe8 AN |
1371 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
1372 | ||
1373 | switch (oper) { | |
1374 | case NL80211_TDLS_ENABLE_LINK: | |
c5a71688 AN |
1375 | if (sdata->vif.csa_active) { |
1376 | tdls_dbg(sdata, "TDLS: disallow link during CSA\n"); | |
1377 | ret = -EBUSY; | |
1378 | break; | |
1379 | } | |
1380 | ||
22f66895 | 1381 | mutex_lock(&local->sta_mtx); |
95224fe8 AN |
1382 | sta = sta_info_get(sdata, peer); |
1383 | if (!sta) { | |
22f66895 | 1384 | mutex_unlock(&local->sta_mtx); |
17e6a59a AN |
1385 | ret = -ENOLINK; |
1386 | break; | |
95224fe8 AN |
1387 | } |
1388 | ||
59021c67 | 1389 | iee80211_tdls_recalc_chanctx(sdata, sta); |
22f66895 AA |
1390 | iee80211_tdls_recalc_ht_protection(sdata, sta); |
1391 | ||
95224fe8 | 1392 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
22f66895 | 1393 | mutex_unlock(&local->sta_mtx); |
17e6a59a | 1394 | |
81dd2b88 AN |
1395 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
1396 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); | |
17e6a59a | 1397 | ret = 0; |
95224fe8 AN |
1398 | break; |
1399 | case NL80211_TDLS_DISABLE_LINK: | |
bb3f8486 LK |
1400 | /* |
1401 | * The teardown message in ieee80211_tdls_mgmt_teardown() was | |
1402 | * created while the queues were stopped, so it might still be | |
1403 | * pending. Before flushing the queues we need to be sure the | |
1404 | * message is handled by the tasklet handling pending messages, | |
1405 | * otherwise we might start destroying the station before | |
1406 | * sending the teardown packet. | |
1407 | * Note that this only forces the tasklet to flush pendings - | |
1408 | * not to stop the tasklet from rescheduling itself. | |
1409 | */ | |
1410 | tasklet_kill(&local->tx_pending_tasklet); | |
db67d661 | 1411 | /* flush a potentially queued teardown packet */ |
3b24f4c6 | 1412 | ieee80211_flush_queues(local, sdata, false); |
db67d661 | 1413 | |
17e6a59a | 1414 | ret = sta_info_destroy_addr(sdata, peer); |
22f66895 AA |
1415 | |
1416 | mutex_lock(&local->sta_mtx); | |
1417 | iee80211_tdls_recalc_ht_protection(sdata, NULL); | |
1418 | mutex_unlock(&local->sta_mtx); | |
1419 | ||
59021c67 | 1420 | iee80211_tdls_recalc_chanctx(sdata, NULL); |
17e6a59a | 1421 | break; |
95224fe8 | 1422 | default: |
17e6a59a AN |
1423 | ret = -ENOTSUPP; |
1424 | break; | |
95224fe8 AN |
1425 | } |
1426 | ||
81dd2b88 AN |
1427 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
1428 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); | |
1429 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
1430 | } |
1431 | ||
d51c2ea3 AN |
1432 | if (ret == 0) |
1433 | ieee80211_queue_work(&sdata->local->hw, | |
1434 | &sdata->u.mgd.request_smps_work); | |
1435 | ||
17e6a59a | 1436 | mutex_unlock(&local->mtx); |
22f66895 | 1437 | sdata_unlock(sdata); |
17e6a59a | 1438 | return ret; |
95224fe8 | 1439 | } |
c887f0d3 AN |
1440 | |
1441 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, | |
1442 | enum nl80211_tdls_operation oper, | |
1443 | u16 reason_code, gfp_t gfp) | |
1444 | { | |
1445 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1446 | ||
1447 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { | |
1448 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", | |
1449 | oper); | |
1450 | return; | |
1451 | } | |
1452 | ||
1453 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); | |
1454 | } | |
1455 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); | |
a7a6bdd0 AN |
1456 | |
1457 | static void | |
1458 | iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout) | |
1459 | { | |
1460 | struct ieee80211_ch_switch_timing *ch_sw; | |
1461 | ||
1462 | *buf++ = WLAN_EID_CHAN_SWITCH_TIMING; | |
1463 | *buf++ = sizeof(struct ieee80211_ch_switch_timing); | |
1464 | ||
1465 | ch_sw = (void *)buf; | |
1466 | ch_sw->switch_time = cpu_to_le16(switch_time); | |
1467 | ch_sw->switch_timeout = cpu_to_le16(switch_timeout); | |
1468 | } | |
1469 | ||
1470 | /* find switch timing IE in SKB ready for Tx */ | |
1471 | static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb) | |
1472 | { | |
1473 | struct ieee80211_tdls_data *tf; | |
1474 | const u8 *ie_start; | |
1475 | ||
1476 | /* | |
1477 | * Get the offset for the new location of the switch timing IE. | |
1478 | * The SKB network header will now point to the "payload_type" | |
1479 | * element of the TDLS data frame struct. | |
1480 | */ | |
1481 | tf = container_of(skb->data + skb_network_offset(skb), | |
1482 | struct ieee80211_tdls_data, payload_type); | |
1483 | ie_start = tf->u.chan_switch_req.variable; | |
1484 | return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start, | |
1485 | skb->len - (ie_start - skb->data)); | |
1486 | } | |
1487 | ||
1488 | static struct sk_buff * | |
1489 | ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class, | |
1490 | struct cfg80211_chan_def *chandef, | |
1491 | u32 *ch_sw_tm_ie_offset) | |
1492 | { | |
1493 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1494 | u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
1495 | 2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1496 | int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing); | |
1497 | u8 *pos = extra_ies; | |
1498 | struct sk_buff *skb; | |
1499 | ||
1500 | /* | |
1501 | * if chandef points to a wide channel add a Secondary-Channel | |
1502 | * Offset information element | |
1503 | */ | |
1504 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1505 | struct ieee80211_sec_chan_offs_ie *sec_chan_ie; | |
1506 | bool ht40plus; | |
1507 | ||
1508 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; | |
1509 | *pos++ = sizeof(*sec_chan_ie); | |
1510 | sec_chan_ie = (void *)pos; | |
1511 | ||
1512 | ht40plus = cfg80211_get_chandef_type(chandef) == | |
1513 | NL80211_CHAN_HT40PLUS; | |
1514 | sec_chan_ie->sec_chan_offs = ht40plus ? | |
1515 | IEEE80211_HT_PARAM_CHA_SEC_ABOVE : | |
1516 | IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1517 | pos += sizeof(*sec_chan_ie); | |
1518 | ||
1519 | extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
1520 | } | |
1521 | ||
1522 | /* just set the values to 0, this is a template */ | |
1523 | iee80211_tdls_add_ch_switch_timing(pos, 0, 0); | |
1524 | ||
1525 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1526 | WLAN_TDLS_CHANNEL_SWITCH_REQUEST, | |
1527 | 0, 0, !sta->sta.tdls_initiator, | |
1528 | extra_ies, extra_ies_len, | |
1529 | oper_class, chandef); | |
1530 | if (!skb) | |
1531 | return NULL; | |
1532 | ||
1533 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1534 | if (IS_ERR(skb)) { | |
1535 | tdls_dbg(sdata, "Failed building TDLS channel switch frame\n"); | |
1536 | return NULL; | |
1537 | } | |
1538 | ||
1539 | if (ch_sw_tm_ie_offset) { | |
1540 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1541 | ||
1542 | if (!tm_ie) { | |
1543 | tdls_dbg(sdata, "No switch timing IE in TDLS switch\n"); | |
1544 | dev_kfree_skb_any(skb); | |
1545 | return NULL; | |
1546 | } | |
1547 | ||
1548 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1549 | } | |
1550 | ||
1551 | tdls_dbg(sdata, | |
1552 | "TDLS channel switch request template for %pM ch %d width %d\n", | |
1553 | sta->sta.addr, chandef->chan->center_freq, chandef->width); | |
1554 | return skb; | |
1555 | } | |
1556 | ||
1557 | int | |
1558 | ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, | |
1559 | const u8 *addr, u8 oper_class, | |
1560 | struct cfg80211_chan_def *chandef) | |
1561 | { | |
1562 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1563 | struct ieee80211_local *local = sdata->local; | |
1564 | struct sta_info *sta; | |
1565 | struct sk_buff *skb = NULL; | |
1566 | u32 ch_sw_tm_ie; | |
1567 | int ret; | |
1568 | ||
b6011960 TP |
1569 | if (chandef->chan->freq_offset) |
1570 | /* this may work, but is untested */ | |
1571 | return -EOPNOTSUPP; | |
1572 | ||
a7a6bdd0 AN |
1573 | mutex_lock(&local->sta_mtx); |
1574 | sta = sta_info_get(sdata, addr); | |
1575 | if (!sta) { | |
1576 | tdls_dbg(sdata, | |
1577 | "Invalid TDLS peer %pM for channel switch request\n", | |
1578 | addr); | |
1579 | ret = -ENOENT; | |
1580 | goto out; | |
1581 | } | |
1582 | ||
1583 | if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) { | |
1584 | tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n", | |
1585 | addr); | |
1586 | ret = -ENOTSUPP; | |
1587 | goto out; | |
1588 | } | |
1589 | ||
1590 | skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef, | |
1591 | &ch_sw_tm_ie); | |
1592 | if (!skb) { | |
1593 | ret = -ENOENT; | |
1594 | goto out; | |
1595 | } | |
1596 | ||
1597 | ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class, | |
1598 | chandef, skb, ch_sw_tm_ie); | |
1599 | if (!ret) | |
1600 | set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1601 | ||
1602 | out: | |
1603 | mutex_unlock(&local->sta_mtx); | |
1604 | dev_kfree_skb_any(skb); | |
1605 | return ret; | |
1606 | } | |
1607 | ||
1608 | void | |
1609 | ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, | |
1610 | struct net_device *dev, | |
1611 | const u8 *addr) | |
1612 | { | |
1613 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1614 | struct ieee80211_local *local = sdata->local; | |
1615 | struct sta_info *sta; | |
1616 | ||
1617 | mutex_lock(&local->sta_mtx); | |
1618 | sta = sta_info_get(sdata, addr); | |
1619 | if (!sta) { | |
1620 | tdls_dbg(sdata, | |
1621 | "Invalid TDLS peer %pM for channel switch cancel\n", | |
1622 | addr); | |
1623 | goto out; | |
1624 | } | |
1625 | ||
1626 | if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
1627 | tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n", | |
1628 | addr); | |
1629 | goto out; | |
1630 | } | |
1631 | ||
1632 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
1633 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1634 | ||
1635 | out: | |
1636 | mutex_unlock(&local->sta_mtx); | |
1637 | } | |
8a4d32f3 AN |
1638 | |
1639 | static struct sk_buff * | |
1640 | ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta, | |
1641 | u32 *ch_sw_tm_ie_offset) | |
1642 | { | |
1643 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1644 | struct sk_buff *skb; | |
1645 | u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1646 | ||
1647 | /* initial timing are always zero in the template */ | |
1648 | iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0); | |
1649 | ||
1650 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1651 | WLAN_TDLS_CHANNEL_SWITCH_RESPONSE, | |
1652 | 0, 0, !sta->sta.tdls_initiator, | |
1653 | extra_ies, sizeof(extra_ies), 0, NULL); | |
1654 | if (!skb) | |
1655 | return NULL; | |
1656 | ||
1657 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1658 | if (IS_ERR(skb)) { | |
1659 | tdls_dbg(sdata, | |
1660 | "Failed building TDLS channel switch resp frame\n"); | |
1661 | return NULL; | |
1662 | } | |
1663 | ||
1664 | if (ch_sw_tm_ie_offset) { | |
1665 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1666 | ||
1667 | if (!tm_ie) { | |
1668 | tdls_dbg(sdata, | |
1669 | "No switch timing IE in TDLS switch resp\n"); | |
1670 | dev_kfree_skb_any(skb); | |
1671 | return NULL; | |
1672 | } | |
1673 | ||
1674 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1675 | } | |
1676 | ||
1677 | tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n", | |
1678 | sta->sta.addr); | |
1679 | return skb; | |
1680 | } | |
1681 | ||
1682 | static int | |
1683 | ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, | |
1684 | struct sk_buff *skb) | |
1685 | { | |
1686 | struct ieee80211_local *local = sdata->local; | |
1687 | struct ieee802_11_elems elems; | |
1688 | struct sta_info *sta; | |
1689 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1690 | bool local_initiator; | |
1691 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1692 | int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable); | |
1693 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1694 | int ret; | |
1695 | ||
1696 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
1697 | params.timestamp = rx_status->device_timestamp; | |
1698 | ||
1699 | if (skb->len < baselen) { | |
1700 | tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n", | |
1701 | skb->len); | |
1702 | return -EINVAL; | |
1703 | } | |
1704 | ||
1705 | mutex_lock(&local->sta_mtx); | |
1706 | sta = sta_info_get(sdata, tf->sa); | |
1707 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1708 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1709 | tf->sa); | |
1710 | ret = -EINVAL; | |
1711 | goto out; | |
1712 | } | |
1713 | ||
1714 | params.sta = &sta->sta; | |
1715 | params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code); | |
1716 | if (params.status != 0) { | |
1717 | ret = 0; | |
1718 | goto call_drv; | |
1719 | } | |
1720 | ||
1721 | ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, | |
4abb52a4 SS |
1722 | skb->len - baselen, false, &elems, |
1723 | NULL, NULL); | |
8a4d32f3 AN |
1724 | if (elems.parse_error) { |
1725 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); | |
1726 | ret = -EINVAL; | |
1727 | goto out; | |
1728 | } | |
1729 | ||
1730 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1731 | tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); | |
1732 | ret = -EINVAL; | |
1733 | goto out; | |
1734 | } | |
1735 | ||
1736 | /* validate the initiator is set correctly */ | |
1737 | local_initiator = | |
1738 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1739 | if (local_initiator == sta->sta.tdls_initiator) { | |
1740 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1741 | ret = -EINVAL; | |
1742 | goto out; | |
1743 | } | |
1744 | ||
1745 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1746 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1747 | ||
1748 | params.tmpl_skb = | |
1749 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); | |
1750 | if (!params.tmpl_skb) { | |
1751 | ret = -ENOENT; | |
1752 | goto out; | |
1753 | } | |
1754 | ||
49708e37 | 1755 | ret = 0; |
8a4d32f3 AN |
1756 | call_drv: |
1757 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1758 | ||
1759 | tdls_dbg(sdata, | |
1760 | "TDLS channel switch response received from %pM status %d\n", | |
1761 | tf->sa, params.status); | |
1762 | ||
1763 | out: | |
1764 | mutex_unlock(&local->sta_mtx); | |
1765 | dev_kfree_skb_any(params.tmpl_skb); | |
1766 | return ret; | |
1767 | } | |
1768 | ||
1769 | static int | |
1770 | ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, | |
1771 | struct sk_buff *skb) | |
1772 | { | |
1773 | struct ieee80211_local *local = sdata->local; | |
1774 | struct ieee802_11_elems elems; | |
1775 | struct cfg80211_chan_def chandef; | |
1776 | struct ieee80211_channel *chan; | |
1777 | enum nl80211_channel_type chan_type; | |
1778 | int freq; | |
1779 | u8 target_channel, oper_class; | |
1780 | bool local_initiator; | |
1781 | struct sta_info *sta; | |
57fbcce3 | 1782 | enum nl80211_band band; |
8a4d32f3 AN |
1783 | struct ieee80211_tdls_data *tf = (void *)skb->data; |
1784 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1785 | int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable); | |
1786 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1787 | int ret = 0; | |
1788 | ||
1789 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
1790 | params.timestamp = rx_status->device_timestamp; | |
1791 | ||
1792 | if (skb->len < baselen) { | |
1793 | tdls_dbg(sdata, "TDLS channel switch req too short: %d\n", | |
1794 | skb->len); | |
1795 | return -EINVAL; | |
1796 | } | |
1797 | ||
1798 | target_channel = tf->u.chan_switch_req.target_channel; | |
1799 | oper_class = tf->u.chan_switch_req.oper_class; | |
1800 | ||
1801 | /* | |
1802 | * We can't easily infer the channel band. The operating class is | |
1803 | * ambiguous - there are multiple tables (US/Europe/JP/Global). The | |
1804 | * solution here is to treat channels with number >14 as 5GHz ones, | |
1805 | * and specifically check for the (oper_class, channel) combinations | |
1806 | * where this doesn't hold. These are thankfully unique according to | |
1807 | * IEEE802.11-2012. | |
1808 | * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as | |
1809 | * valid here. | |
1810 | */ | |
1811 | if ((oper_class == 112 || oper_class == 2 || oper_class == 3 || | |
1812 | oper_class == 4 || oper_class == 5 || oper_class == 6) && | |
1813 | target_channel < 14) | |
57fbcce3 | 1814 | band = NL80211_BAND_5GHZ; |
8a4d32f3 | 1815 | else |
57fbcce3 JB |
1816 | band = target_channel < 14 ? NL80211_BAND_2GHZ : |
1817 | NL80211_BAND_5GHZ; | |
8a4d32f3 AN |
1818 | |
1819 | freq = ieee80211_channel_to_frequency(target_channel, band); | |
1820 | if (freq == 0) { | |
1821 | tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n", | |
1822 | target_channel); | |
1823 | return -EINVAL; | |
1824 | } | |
1825 | ||
1826 | chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); | |
1827 | if (!chan) { | |
1828 | tdls_dbg(sdata, | |
1829 | "Unsupported channel for TDLS chan switch: %d\n", | |
1830 | target_channel); | |
1831 | return -EINVAL; | |
1832 | } | |
1833 | ||
1834 | ieee802_11_parse_elems(tf->u.chan_switch_req.variable, | |
4abb52a4 | 1835 | skb->len - baselen, false, &elems, NULL, NULL); |
8a4d32f3 AN |
1836 | if (elems.parse_error) { |
1837 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); | |
1838 | return -EINVAL; | |
1839 | } | |
1840 | ||
1841 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1842 | tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); | |
1843 | return -EINVAL; | |
1844 | } | |
1845 | ||
42d8d789 AN |
1846 | if (!elems.sec_chan_offs) { |
1847 | chan_type = NL80211_CHAN_HT20; | |
1848 | } else { | |
1849 | switch (elems.sec_chan_offs->sec_chan_offs) { | |
1850 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1851 | chan_type = NL80211_CHAN_HT40PLUS; | |
1852 | break; | |
1853 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1854 | chan_type = NL80211_CHAN_HT40MINUS; | |
1855 | break; | |
1856 | default: | |
1857 | chan_type = NL80211_CHAN_HT20; | |
1858 | break; | |
1859 | } | |
1860 | } | |
1861 | ||
1862 | cfg80211_chandef_create(&chandef, chan, chan_type); | |
1863 | ||
1864 | /* we will be active on the TDLS link */ | |
1865 | if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef, | |
1866 | sdata->wdev.iftype)) { | |
1867 | tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n"); | |
1868 | return -EINVAL; | |
1869 | } | |
1870 | ||
8a4d32f3 AN |
1871 | mutex_lock(&local->sta_mtx); |
1872 | sta = sta_info_get(sdata, tf->sa); | |
1873 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1874 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1875 | tf->sa); | |
1876 | ret = -EINVAL; | |
1877 | goto out; | |
1878 | } | |
1879 | ||
1880 | params.sta = &sta->sta; | |
1881 | ||
1882 | /* validate the initiator is set correctly */ | |
1883 | local_initiator = | |
1884 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1885 | if (local_initiator == sta->sta.tdls_initiator) { | |
1886 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1887 | ret = -EINVAL; | |
1888 | goto out; | |
1889 | } | |
1890 | ||
42d8d789 AN |
1891 | /* peer should have known better */ |
1892 | if (!sta->sta.ht_cap.ht_supported && elems.sec_chan_offs && | |
1893 | elems.sec_chan_offs->sec_chan_offs) { | |
1894 | tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n"); | |
1895 | ret = -ENOTSUPP; | |
1896 | goto out; | |
8a4d32f3 AN |
1897 | } |
1898 | ||
8a4d32f3 | 1899 | params.chandef = &chandef; |
8a4d32f3 AN |
1900 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); |
1901 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1902 | ||
1903 | params.tmpl_skb = | |
1904 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, | |
1905 | ¶ms.ch_sw_tm_ie); | |
1906 | if (!params.tmpl_skb) { | |
1907 | ret = -ENOENT; | |
1908 | goto out; | |
1909 | } | |
1910 | ||
1911 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1912 | ||
1913 | tdls_dbg(sdata, | |
1914 | "TDLS ch switch request received from %pM ch %d width %d\n", | |
1915 | tf->sa, params.chandef->chan->center_freq, | |
1916 | params.chandef->width); | |
1917 | out: | |
1918 | mutex_unlock(&local->sta_mtx); | |
1919 | dev_kfree_skb_any(params.tmpl_skb); | |
1920 | return ret; | |
1921 | } | |
1922 | ||
c8ff71e6 AN |
1923 | static void |
1924 | ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, | |
1925 | struct sk_buff *skb) | |
8a4d32f3 AN |
1926 | { |
1927 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1928 | struct wiphy *wiphy = sdata->local->hw.wiphy; | |
1929 | ||
c8ff71e6 AN |
1930 | ASSERT_RTNL(); |
1931 | ||
8a4d32f3 AN |
1932 | /* make sure the driver supports it */ |
1933 | if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH)) | |
1934 | return; | |
1935 | ||
1936 | /* we want to access the entire packet */ | |
1937 | if (skb_linearize(skb)) | |
1938 | return; | |
1939 | /* | |
1940 | * The packet/size was already validated by mac80211 Rx path, only look | |
1941 | * at the action type. | |
1942 | */ | |
1943 | switch (tf->action_code) { | |
1944 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: | |
1945 | ieee80211_process_tdls_channel_switch_req(sdata, skb); | |
1946 | break; | |
1947 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: | |
1948 | ieee80211_process_tdls_channel_switch_resp(sdata, skb); | |
1949 | break; | |
1950 | default: | |
1951 | WARN_ON_ONCE(1); | |
1952 | return; | |
1953 | } | |
1954 | } | |
d51c2ea3 AN |
1955 | |
1956 | void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) | |
1957 | { | |
1958 | struct sta_info *sta; | |
1959 | u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED; | |
1960 | ||
1961 | rcu_read_lock(); | |
1962 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1963 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1964 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1965 | continue; | |
1966 | ||
1967 | ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr, | |
1968 | NL80211_TDLS_TEARDOWN, reason, | |
1969 | GFP_ATOMIC); | |
1970 | } | |
1971 | rcu_read_unlock(); | |
1972 | } | |
c8ff71e6 AN |
1973 | |
1974 | void ieee80211_tdls_chsw_work(struct work_struct *wk) | |
1975 | { | |
1976 | struct ieee80211_local *local = | |
1977 | container_of(wk, struct ieee80211_local, tdls_chsw_work); | |
1978 | struct ieee80211_sub_if_data *sdata; | |
1979 | struct sk_buff *skb; | |
1980 | struct ieee80211_tdls_data *tf; | |
1981 | ||
1982 | rtnl_lock(); | |
1983 | while ((skb = skb_dequeue(&local->skb_queue_tdls_chsw))) { | |
1984 | tf = (struct ieee80211_tdls_data *)skb->data; | |
1985 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1986 | if (!ieee80211_sdata_running(sdata) || | |
1987 | sdata->vif.type != NL80211_IFTYPE_STATION || | |
1988 | !ether_addr_equal(tf->da, sdata->vif.addr)) | |
1989 | continue; | |
1990 | ||
1991 | ieee80211_process_tdls_channel_switch(sdata, skb); | |
1992 | break; | |
1993 | } | |
1994 | ||
1995 | kfree_skb(skb); | |
1996 | } | |
1997 | rtnl_unlock(); | |
1998 | } | |
79c92ca4 YW |
1999 | |
2000 | void ieee80211_tdls_handle_disconnect(struct ieee80211_sub_if_data *sdata, | |
2001 | const u8 *peer, u16 reason) | |
2002 | { | |
2003 | struct ieee80211_sta *sta; | |
2004 | ||
2005 | rcu_read_lock(); | |
2006 | sta = ieee80211_find_sta(&sdata->vif, peer); | |
2007 | if (!sta || !sta->tdls) { | |
2008 | rcu_read_unlock(); | |
2009 | return; | |
2010 | } | |
2011 | rcu_read_unlock(); | |
2012 | ||
2013 | tdls_dbg(sdata, "disconnected from TDLS peer %pM (Reason: %u=%s)\n", | |
2014 | peer, reason, | |
2015 | ieee80211_get_reason_code_string(reason)); | |
2016 | ||
2017 | ieee80211_tdls_oper_request(&sdata->vif, peer, | |
2018 | NL80211_TDLS_TEARDOWN, | |
2019 | WLAN_REASON_TDLS_TEARDOWN_UNREACHABLE, | |
2020 | GFP_ATOMIC); | |
2021 | } |