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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 |
59021c67 | 7 | * Copyright 2015 - 2016 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" |
59021c67 | 18 | #include "rate.h" |
95224fe8 | 19 | |
17e6a59a AN |
20 | /* give usermode some time for retries in setting up the TDLS session */ |
21 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) | |
22 | ||
23 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) | |
24 | { | |
25 | struct ieee80211_sub_if_data *sdata; | |
26 | struct ieee80211_local *local; | |
27 | ||
28 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
81dd2b88 | 29 | u.mgd.tdls_peer_del_work.work); |
17e6a59a AN |
30 | local = sdata->local; |
31 | ||
32 | mutex_lock(&local->mtx); | |
81dd2b88 AN |
33 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
34 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); | |
35 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); | |
36 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
37 | } |
38 | mutex_unlock(&local->mtx); | |
39 | } | |
40 | ||
b98fb44f | 41 | static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, |
78632a17 | 42 | struct sk_buff *skb) |
95224fe8 | 43 | { |
b98fb44f | 44 | struct ieee80211_local *local = sdata->local; |
82c0cc90 | 45 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
78632a17 AN |
46 | bool chan_switch = local->hw.wiphy->features & |
47 | NL80211_FEATURE_TDLS_CHANNEL_SWITCH; | |
82c0cc90 AN |
48 | bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW) && |
49 | !ifmgd->tdls_wider_bw_prohibited; | |
57fbcce3 | 50 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
b98fb44f AN |
51 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; |
52 | bool vht = sband && sband->vht_cap.vht_supported; | |
53 | u8 *pos = (void *)skb_put(skb, 10); | |
95224fe8 AN |
54 | |
55 | *pos++ = WLAN_EID_EXT_CAPABILITY; | |
b98fb44f | 56 | *pos++ = 8; /* len */ |
95224fe8 AN |
57 | *pos++ = 0x0; |
58 | *pos++ = 0x0; | |
59 | *pos++ = 0x0; | |
78632a17 | 60 | *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0; |
95224fe8 | 61 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
b98fb44f AN |
62 | *pos++ = 0; |
63 | *pos++ = 0; | |
64 | *pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0; | |
95224fe8 AN |
65 | } |
66 | ||
f0d29cb9 AN |
67 | static u8 |
68 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, | |
69 | struct sk_buff *skb, u16 start, u16 end, | |
70 | u16 spacing) | |
71 | { | |
72 | u8 subband_cnt = 0, ch_cnt = 0; | |
73 | struct ieee80211_channel *ch; | |
74 | struct cfg80211_chan_def chandef; | |
75 | int i, subband_start; | |
923b352f | 76 | struct wiphy *wiphy = sdata->local->hw.wiphy; |
f0d29cb9 AN |
77 | |
78 | for (i = start; i <= end; i += spacing) { | |
79 | if (!ch_cnt) | |
80 | subband_start = i; | |
81 | ||
82 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); | |
83 | if (ch) { | |
84 | /* we will be active on the channel */ | |
f0d29cb9 | 85 | cfg80211_chandef_create(&chandef, ch, |
50075892 | 86 | NL80211_CHAN_NO_HT); |
923b352f AN |
87 | if (cfg80211_reg_can_beacon_relax(wiphy, &chandef, |
88 | sdata->wdev.iftype)) { | |
f0d29cb9 | 89 | ch_cnt++; |
50075892 AN |
90 | /* |
91 | * check if the next channel is also part of | |
92 | * this allowed range | |
93 | */ | |
f0d29cb9 AN |
94 | continue; |
95 | } | |
96 | } | |
97 | ||
50075892 AN |
98 | /* |
99 | * we've reached the end of a range, with allowed channels | |
100 | * found | |
101 | */ | |
f0d29cb9 AN |
102 | if (ch_cnt) { |
103 | u8 *pos = skb_put(skb, 2); | |
104 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
105 | *pos++ = ch_cnt; | |
106 | ||
107 | subband_cnt++; | |
108 | ch_cnt = 0; | |
109 | } | |
110 | } | |
111 | ||
50075892 AN |
112 | /* all channels in the requested range are allowed - add them here */ |
113 | if (ch_cnt) { | |
114 | u8 *pos = skb_put(skb, 2); | |
115 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
116 | *pos++ = ch_cnt; | |
117 | ||
118 | subband_cnt++; | |
119 | } | |
120 | ||
f0d29cb9 AN |
121 | return subband_cnt; |
122 | } | |
123 | ||
124 | static void | |
125 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, | |
126 | struct sk_buff *skb) | |
127 | { | |
128 | /* | |
129 | * Add possible channels for TDLS. These are channels that are allowed | |
130 | * to be active. | |
131 | */ | |
132 | u8 subband_cnt; | |
133 | u8 *pos = skb_put(skb, 2); | |
134 | ||
135 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
136 | ||
137 | /* | |
138 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as | |
139 | * this doesn't happen in real world scenarios. | |
140 | */ | |
141 | ||
142 | /* 2GHz, with 5MHz spacing */ | |
143 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); | |
144 | ||
145 | /* 5GHz, with 20MHz spacing */ | |
146 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); | |
147 | ||
148 | /* length */ | |
149 | *pos = 2 * subband_cnt; | |
150 | } | |
151 | ||
a38700dd AN |
152 | static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, |
153 | struct sk_buff *skb) | |
154 | { | |
155 | u8 *pos; | |
156 | u8 op_class; | |
157 | ||
158 | if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef, | |
159 | &op_class)) | |
160 | return; | |
161 | ||
162 | pos = skb_put(skb, 4); | |
163 | *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES; | |
164 | *pos++ = 2; /* len */ | |
165 | ||
166 | *pos++ = op_class; | |
167 | *pos++ = op_class; /* give current operating class as alternate too */ | |
168 | } | |
169 | ||
2cedd879 AN |
170 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
171 | { | |
172 | u8 *pos = (void *)skb_put(skb, 3); | |
173 | ||
174 | *pos++ = WLAN_EID_BSS_COEX_2040; | |
175 | *pos++ = 1; /* len */ | |
176 | ||
177 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; | |
178 | } | |
179 | ||
dd8c0b03 AN |
180 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
181 | u16 status_code) | |
95224fe8 | 182 | { |
dd8c0b03 AN |
183 | /* The capability will be 0 when sending a failure code */ |
184 | if (status_code != 0) | |
185 | return 0; | |
186 | ||
57fbcce3 | 187 | if (ieee80211_get_sdata_band(sdata) == NL80211_BAND_2GHZ) { |
ea1b2b45 JB |
188 | return WLAN_CAPABILITY_SHORT_SLOT_TIME | |
189 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
190 | } | |
95224fe8 | 191 | |
ea1b2b45 | 192 | return 0; |
95224fe8 AN |
193 | } |
194 | ||
1606ef4a AN |
195 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
196 | struct sk_buff *skb, const u8 *peer, | |
197 | bool initiator) | |
95224fe8 AN |
198 | { |
199 | struct ieee80211_tdls_lnkie *lnkid; | |
1606ef4a AN |
200 | const u8 *init_addr, *rsp_addr; |
201 | ||
202 | if (initiator) { | |
203 | init_addr = sdata->vif.addr; | |
204 | rsp_addr = peer; | |
205 | } else { | |
206 | init_addr = peer; | |
207 | rsp_addr = sdata->vif.addr; | |
208 | } | |
95224fe8 AN |
209 | |
210 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); | |
211 | ||
212 | lnkid->ie_type = WLAN_EID_LINK_ID; | |
213 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; | |
214 | ||
1606ef4a AN |
215 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
216 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); | |
217 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); | |
95224fe8 AN |
218 | } |
219 | ||
fb28ec0c AN |
220 | static void |
221 | ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) | |
222 | { | |
223 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
224 | u8 *pos = (void *)skb_put(skb, 4); | |
225 | ||
226 | *pos++ = WLAN_EID_AID; | |
227 | *pos++ = 2; /* len */ | |
228 | put_unaligned_le16(ifmgd->aid, pos); | |
229 | } | |
230 | ||
6f7eaa47 AN |
231 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
232 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) | |
233 | { | |
234 | switch (ac) { | |
235 | default: | |
236 | WARN_ON_ONCE(1); | |
237 | case 0: | |
238 | return IEEE80211_AC_BE; | |
239 | case 1: | |
240 | return IEEE80211_AC_BK; | |
241 | case 2: | |
242 | return IEEE80211_AC_VI; | |
243 | case 3: | |
244 | return IEEE80211_AC_VO; | |
245 | } | |
246 | } | |
247 | ||
248 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) | |
249 | { | |
250 | u8 ret; | |
251 | ||
252 | ret = aifsn & 0x0f; | |
253 | if (acm) | |
254 | ret |= 0x10; | |
255 | ret |= (aci << 5) & 0x60; | |
256 | return ret; | |
257 | } | |
258 | ||
259 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) | |
260 | { | |
261 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | | |
262 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); | |
263 | } | |
264 | ||
265 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, | |
266 | struct sk_buff *skb) | |
267 | { | |
268 | struct ieee80211_wmm_param_ie *wmm; | |
269 | struct ieee80211_tx_queue_params *txq; | |
270 | int i; | |
271 | ||
272 | wmm = (void *)skb_put(skb, sizeof(*wmm)); | |
273 | memset(wmm, 0, sizeof(*wmm)); | |
274 | ||
275 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; | |
276 | wmm->len = sizeof(*wmm) - 2; | |
277 | ||
278 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ | |
279 | wmm->oui[1] = 0x50; | |
280 | wmm->oui[2] = 0xf2; | |
281 | wmm->oui_type = 2; /* WME */ | |
282 | wmm->oui_subtype = 1; /* WME param */ | |
283 | wmm->version = 1; /* WME ver */ | |
284 | wmm->qos_info = 0; /* U-APSD not in use */ | |
285 | ||
286 | /* | |
287 | * Use the EDCA parameters defined for the BSS, or default if the AP | |
288 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 | |
289 | */ | |
290 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
291 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; | |
292 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, | |
293 | txq->acm, i); | |
294 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); | |
295 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); | |
296 | } | |
297 | } | |
298 | ||
0fabfaaf AN |
299 | static void |
300 | ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata, | |
301 | struct sta_info *sta) | |
302 | { | |
303 | /* IEEE802.11ac-2013 Table E-4 */ | |
304 | u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 }; | |
305 | struct cfg80211_chan_def uc = sta->tdls_chandef; | |
59021c67 | 306 | enum nl80211_chan_width max_width = ieee80211_sta_cap_chan_bw(sta); |
0fabfaaf AN |
307 | int i; |
308 | ||
309 | /* only support upgrading non-narrow channels up to 80Mhz */ | |
310 | if (max_width == NL80211_CHAN_WIDTH_5 || | |
311 | max_width == NL80211_CHAN_WIDTH_10) | |
312 | return; | |
313 | ||
314 | if (max_width > NL80211_CHAN_WIDTH_80) | |
315 | max_width = NL80211_CHAN_WIDTH_80; | |
316 | ||
4b559ec0 | 317 | if (uc.width >= max_width) |
0fabfaaf AN |
318 | return; |
319 | /* | |
320 | * Channel usage constrains in the IEEE802.11ac-2013 specification only | |
321 | * allow expanding a 20MHz channel to 80MHz in a single way. In | |
322 | * addition, there are no 40MHz allowed channels that are not part of | |
323 | * the allowed 80MHz range in the 5GHz spectrum (the relevant one here). | |
324 | */ | |
325 | for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++) | |
326 | if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) { | |
327 | uc.center_freq1 = centers_80mhz[i]; | |
4b559ec0 | 328 | uc.center_freq2 = 0; |
0fabfaaf AN |
329 | uc.width = NL80211_CHAN_WIDTH_80; |
330 | break; | |
331 | } | |
332 | ||
333 | if (!uc.center_freq1) | |
334 | return; | |
335 | ||
554d072e | 336 | /* proceed to downgrade the chandef until usable or the same as AP BW */ |
db8d9977 | 337 | while (uc.width > max_width || |
554d072e AN |
338 | (uc.width > sta->tdls_chandef.width && |
339 | !cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &uc, | |
340 | sdata->wdev.iftype))) | |
0fabfaaf AN |
341 | ieee80211_chandef_downgrade(&uc); |
342 | ||
343 | if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) { | |
344 | tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n", | |
345 | sta->tdls_chandef.width, uc.width); | |
346 | ||
347 | /* | |
348 | * the station is not yet authorized when BW upgrade is done, | |
349 | * locking is not required | |
350 | */ | |
351 | sta->tdls_chandef = uc; | |
352 | } | |
353 | } | |
354 | ||
f09a87d2 AN |
355 | static void |
356 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, | |
357 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
358 | u8 action_code, bool initiator, |
359 | const u8 *extra_ies, size_t extra_ies_len) | |
f09a87d2 | 360 | { |
57fbcce3 | 361 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
40b861a0 | 362 | struct ieee80211_local *local = sdata->local; |
13cc8a4a AN |
363 | struct ieee80211_supported_band *sband; |
364 | struct ieee80211_sta_ht_cap ht_cap; | |
fb28ec0c | 365 | struct ieee80211_sta_vht_cap vht_cap; |
13cc8a4a | 366 | struct sta_info *sta = NULL; |
f09a87d2 AN |
367 | size_t offset = 0, noffset; |
368 | u8 *pos; | |
369 | ||
370 | ieee80211_add_srates_ie(sdata, skb, false, band); | |
371 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); | |
f0d29cb9 | 372 | ieee80211_tdls_add_supp_channels(sdata, skb); |
f09a87d2 AN |
373 | |
374 | /* add any custom IEs that go before Extended Capabilities */ | |
375 | if (extra_ies_len) { | |
376 | static const u8 before_ext_cap[] = { | |
377 | WLAN_EID_SUPP_RATES, | |
378 | WLAN_EID_COUNTRY, | |
379 | WLAN_EID_EXT_SUPP_RATES, | |
380 | WLAN_EID_SUPPORTED_CHANNELS, | |
381 | WLAN_EID_RSN, | |
382 | }; | |
383 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
384 | before_ext_cap, | |
385 | ARRAY_SIZE(before_ext_cap), | |
386 | offset); | |
387 | pos = skb_put(skb, noffset - offset); | |
388 | memcpy(pos, extra_ies + offset, noffset - offset); | |
389 | offset = noffset; | |
390 | } | |
391 | ||
b98fb44f | 392 | ieee80211_tdls_add_ext_capab(sdata, skb); |
f09a87d2 | 393 | |
40b861a0 AN |
394 | /* add the QoS element if we support it */ |
395 | if (local->hw.queues >= IEEE80211_NUM_ACS && | |
396 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) | |
397 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ | |
398 | ||
f09a87d2 AN |
399 | /* add any custom IEs that go before HT capabilities */ |
400 | if (extra_ies_len) { | |
401 | static const u8 before_ht_cap[] = { | |
402 | WLAN_EID_SUPP_RATES, | |
403 | WLAN_EID_COUNTRY, | |
404 | WLAN_EID_EXT_SUPP_RATES, | |
405 | WLAN_EID_SUPPORTED_CHANNELS, | |
406 | WLAN_EID_RSN, | |
407 | WLAN_EID_EXT_CAPABILITY, | |
408 | WLAN_EID_QOS_CAPA, | |
409 | WLAN_EID_FAST_BSS_TRANSITION, | |
410 | WLAN_EID_TIMEOUT_INTERVAL, | |
411 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
412 | }; | |
413 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
414 | before_ht_cap, | |
415 | ARRAY_SIZE(before_ht_cap), | |
416 | offset); | |
417 | pos = skb_put(skb, noffset - offset); | |
418 | memcpy(pos, extra_ies + offset, noffset - offset); | |
419 | offset = noffset; | |
420 | } | |
421 | ||
0fabfaaf | 422 | mutex_lock(&local->sta_mtx); |
ae2e9fba AN |
423 | |
424 | /* we should have the peer STA if we're already responding */ | |
425 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { | |
426 | sta = sta_info_get(sdata, peer); | |
427 | if (WARN_ON_ONCE(!sta)) { | |
0fabfaaf | 428 | mutex_unlock(&local->sta_mtx); |
ae2e9fba AN |
429 | return; |
430 | } | |
0fabfaaf AN |
431 | |
432 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; | |
ae2e9fba AN |
433 | } |
434 | ||
a38700dd AN |
435 | ieee80211_tdls_add_oper_classes(sdata, skb); |
436 | ||
13cc8a4a AN |
437 | /* |
438 | * with TDLS we can switch channels, and HT-caps are not necessarily | |
439 | * the same on all bands. The specification limits the setup to a | |
440 | * single HT-cap, so use the current band for now. | |
441 | */ | |
442 | sband = local->hw.wiphy->bands[band]; | |
443 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
c5309ba7 | 444 | |
070e176a AN |
445 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
446 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
447 | ht_cap.ht_supported) { | |
c5309ba7 JB |
448 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
449 | ||
450 | /* disable SMPS in TDLS initiator */ | |
451 | ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED | |
452 | << IEEE80211_HT_CAP_SM_PS_SHIFT; | |
453 | ||
454 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
455 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
456 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
457 | ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
c5309ba7 JB |
458 | /* the peer caps are already intersected with our own */ |
459 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); | |
13cc8a4a AN |
460 | |
461 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
462 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
463 | } | |
464 | ||
2cedd879 AN |
465 | if (ht_cap.ht_supported && |
466 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
467 | ieee80211_tdls_add_bss_coex_ie(skb); | |
468 | ||
fb28ec0c AN |
469 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
470 | ||
471 | /* add any custom IEs that go before VHT capabilities */ | |
472 | if (extra_ies_len) { | |
473 | static const u8 before_vht_cap[] = { | |
474 | WLAN_EID_SUPP_RATES, | |
475 | WLAN_EID_COUNTRY, | |
476 | WLAN_EID_EXT_SUPP_RATES, | |
477 | WLAN_EID_SUPPORTED_CHANNELS, | |
478 | WLAN_EID_RSN, | |
479 | WLAN_EID_EXT_CAPABILITY, | |
480 | WLAN_EID_QOS_CAPA, | |
481 | WLAN_EID_FAST_BSS_TRANSITION, | |
482 | WLAN_EID_TIMEOUT_INTERVAL, | |
483 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
484 | WLAN_EID_MULTI_BAND, | |
485 | }; | |
486 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
487 | before_vht_cap, | |
488 | ARRAY_SIZE(before_vht_cap), | |
489 | offset); | |
490 | pos = skb_put(skb, noffset - offset); | |
491 | memcpy(pos, extra_ies + offset, noffset - offset); | |
492 | offset = noffset; | |
493 | } | |
494 | ||
495 | /* build the VHT-cap similarly to the HT-cap */ | |
496 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
070e176a AN |
497 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
498 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
499 | vht_cap.vht_supported) { | |
fb28ec0c AN |
500 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
501 | ||
502 | /* the AID is present only when VHT is implemented */ | |
070e176a AN |
503 | if (action_code == WLAN_TDLS_SETUP_REQUEST) |
504 | ieee80211_tdls_add_aid(sdata, skb); | |
fb28ec0c AN |
505 | |
506 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
507 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
508 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
509 | vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) { | |
510 | /* the peer caps are already intersected with our own */ | |
511 | memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap)); | |
512 | ||
513 | /* the AID is present only when VHT is implemented */ | |
514 | ieee80211_tdls_add_aid(sdata, skb); | |
515 | ||
516 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
517 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
0fabfaaf AN |
518 | |
519 | /* | |
520 | * if both peers support WIDER_BW, we can expand the chandef to | |
521 | * a wider compatible one, up to 80MHz | |
522 | */ | |
523 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
524 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
fb28ec0c AN |
525 | } |
526 | ||
0fabfaaf | 527 | mutex_unlock(&local->sta_mtx); |
fb28ec0c | 528 | |
f09a87d2 AN |
529 | /* add any remaining IEs */ |
530 | if (extra_ies_len) { | |
531 | noffset = extra_ies_len; | |
532 | pos = skb_put(skb, noffset - offset); | |
533 | memcpy(pos, extra_ies + offset, noffset - offset); | |
534 | } | |
1606ef4a | 535 | |
f09a87d2 AN |
536 | } |
537 | ||
6f7eaa47 AN |
538 | static void |
539 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, | |
540 | struct sk_buff *skb, const u8 *peer, | |
541 | bool initiator, const u8 *extra_ies, | |
542 | size_t extra_ies_len) | |
543 | { | |
544 | struct ieee80211_local *local = sdata->local; | |
13cc8a4a | 545 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6f7eaa47 | 546 | size_t offset = 0, noffset; |
13cc8a4a | 547 | struct sta_info *sta, *ap_sta; |
57fbcce3 | 548 | enum nl80211_band band = ieee80211_get_sdata_band(sdata); |
6f7eaa47 AN |
549 | u8 *pos; |
550 | ||
0fabfaaf | 551 | mutex_lock(&local->sta_mtx); |
6f7eaa47 AN |
552 | |
553 | sta = sta_info_get(sdata, peer); | |
13cc8a4a AN |
554 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
555 | if (WARN_ON_ONCE(!sta || !ap_sta)) { | |
0fabfaaf | 556 | mutex_unlock(&local->sta_mtx); |
6f7eaa47 AN |
557 | return; |
558 | } | |
559 | ||
0fabfaaf AN |
560 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; |
561 | ||
6f7eaa47 AN |
562 | /* add any custom IEs that go before the QoS IE */ |
563 | if (extra_ies_len) { | |
564 | static const u8 before_qos[] = { | |
565 | WLAN_EID_RSN, | |
566 | }; | |
567 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
568 | before_qos, | |
569 | ARRAY_SIZE(before_qos), | |
570 | offset); | |
571 | pos = skb_put(skb, noffset - offset); | |
572 | memcpy(pos, extra_ies + offset, noffset - offset); | |
573 | offset = noffset; | |
574 | } | |
575 | ||
576 | /* add the QoS param IE if both the peer and we support it */ | |
a74a8c84 | 577 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
6f7eaa47 AN |
578 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
579 | ||
13cc8a4a AN |
580 | /* add any custom IEs that go before HT operation */ |
581 | if (extra_ies_len) { | |
582 | static const u8 before_ht_op[] = { | |
583 | WLAN_EID_RSN, | |
584 | WLAN_EID_QOS_CAPA, | |
585 | WLAN_EID_FAST_BSS_TRANSITION, | |
586 | WLAN_EID_TIMEOUT_INTERVAL, | |
587 | }; | |
588 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
589 | before_ht_op, | |
590 | ARRAY_SIZE(before_ht_op), | |
591 | offset); | |
592 | pos = skb_put(skb, noffset - offset); | |
593 | memcpy(pos, extra_ies + offset, noffset - offset); | |
594 | offset = noffset; | |
595 | } | |
596 | ||
57f255f5 AN |
597 | /* |
598 | * if HT support is only added in TDLS, we need an HT-operation IE. | |
599 | * add the IE as required by IEEE802.11-2012 9.23.3.2. | |
600 | */ | |
13cc8a4a | 601 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { |
57f255f5 AN |
602 | u16 prot = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | |
603 | IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT | | |
604 | IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT; | |
605 | ||
890b7878 | 606 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
890b7878 | 607 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, |
57f255f5 AN |
608 | &sdata->vif.bss_conf.chandef, prot, |
609 | true); | |
13cc8a4a AN |
610 | } |
611 | ||
fb28ec0c AN |
612 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
613 | ||
614 | /* only include VHT-operation if not on the 2.4GHz band */ | |
57fbcce3 | 615 | if (band != NL80211_BAND_2GHZ && sta->sta.vht_cap.vht_supported) { |
0fabfaaf AN |
616 | /* |
617 | * if both peers support WIDER_BW, we can expand the chandef to | |
618 | * a wider compatible one, up to 80MHz | |
619 | */ | |
620 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
621 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
622 | ||
890b7878 AN |
623 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); |
624 | ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap, | |
0fabfaaf | 625 | &sta->tdls_chandef); |
fb28ec0c AN |
626 | } |
627 | ||
0fabfaaf | 628 | mutex_unlock(&local->sta_mtx); |
13cc8a4a | 629 | |
6f7eaa47 AN |
630 | /* add any remaining IEs */ |
631 | if (extra_ies_len) { | |
632 | noffset = extra_ies_len; | |
633 | pos = skb_put(skb, noffset - offset); | |
634 | memcpy(pos, extra_ies + offset, noffset - offset); | |
635 | } | |
6f7eaa47 AN |
636 | } |
637 | ||
a7a6bdd0 AN |
638 | static void |
639 | ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, | |
640 | struct sk_buff *skb, const u8 *peer, | |
641 | bool initiator, const u8 *extra_ies, | |
642 | size_t extra_ies_len, u8 oper_class, | |
643 | struct cfg80211_chan_def *chandef) | |
644 | { | |
645 | struct ieee80211_tdls_data *tf; | |
646 | size_t offset = 0, noffset; | |
647 | u8 *pos; | |
648 | ||
649 | if (WARN_ON_ONCE(!chandef)) | |
650 | return; | |
651 | ||
652 | tf = (void *)skb->data; | |
653 | tf->u.chan_switch_req.target_channel = | |
654 | ieee80211_frequency_to_channel(chandef->chan->center_freq); | |
655 | tf->u.chan_switch_req.oper_class = oper_class; | |
656 | ||
657 | if (extra_ies_len) { | |
658 | static const u8 before_lnkie[] = { | |
659 | WLAN_EID_SECONDARY_CHANNEL_OFFSET, | |
660 | }; | |
661 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
662 | before_lnkie, | |
663 | ARRAY_SIZE(before_lnkie), | |
664 | offset); | |
665 | pos = skb_put(skb, noffset - offset); | |
666 | memcpy(pos, extra_ies + offset, noffset - offset); | |
667 | offset = noffset; | |
668 | } | |
669 | ||
670 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
671 | ||
672 | /* add any remaining IEs */ | |
673 | if (extra_ies_len) { | |
674 | noffset = extra_ies_len; | |
675 | pos = skb_put(skb, noffset - offset); | |
676 | memcpy(pos, extra_ies + offset, noffset - offset); | |
677 | } | |
678 | } | |
679 | ||
8a4d32f3 AN |
680 | static void |
681 | ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, | |
682 | struct sk_buff *skb, const u8 *peer, | |
683 | u16 status_code, bool initiator, | |
684 | const u8 *extra_ies, | |
685 | size_t extra_ies_len) | |
686 | { | |
687 | if (status_code == 0) | |
688 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
689 | ||
690 | if (extra_ies_len) | |
691 | memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); | |
692 | } | |
693 | ||
46792a2d AN |
694 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
695 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
696 | u8 action_code, u16 status_code, |
697 | bool initiator, const u8 *extra_ies, | |
c2733905 AN |
698 | size_t extra_ies_len, u8 oper_class, |
699 | struct cfg80211_chan_def *chandef) | |
46792a2d | 700 | { |
46792a2d AN |
701 | switch (action_code) { |
702 | case WLAN_TDLS_SETUP_REQUEST: | |
703 | case WLAN_TDLS_SETUP_RESPONSE: | |
704 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
1606ef4a AN |
705 | if (status_code == 0) |
706 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, | |
707 | action_code, | |
708 | initiator, | |
709 | extra_ies, | |
710 | extra_ies_len); | |
46792a2d AN |
711 | break; |
712 | case WLAN_TDLS_SETUP_CONFIRM: | |
6f7eaa47 AN |
713 | if (status_code == 0) |
714 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, | |
715 | initiator, extra_ies, | |
716 | extra_ies_len); | |
717 | break; | |
46792a2d AN |
718 | case WLAN_TDLS_TEARDOWN: |
719 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
f09a87d2 AN |
720 | if (extra_ies_len) |
721 | memcpy(skb_put(skb, extra_ies_len), extra_ies, | |
722 | extra_ies_len); | |
1606ef4a AN |
723 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
724 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
46792a2d | 725 | break; |
a7a6bdd0 AN |
726 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
727 | ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer, | |
728 | initiator, extra_ies, | |
729 | extra_ies_len, | |
730 | oper_class, chandef); | |
731 | break; | |
8a4d32f3 AN |
732 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
733 | ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer, | |
734 | status_code, | |
735 | initiator, extra_ies, | |
736 | extra_ies_len); | |
737 | break; | |
46792a2d AN |
738 | } |
739 | ||
46792a2d AN |
740 | } |
741 | ||
95224fe8 AN |
742 | static int |
743 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 744 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
745 | u16 status_code, struct sk_buff *skb) |
746 | { | |
747 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
748 | struct ieee80211_tdls_data *tf; |
749 | ||
750 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); | |
751 | ||
752 | memcpy(tf->da, peer, ETH_ALEN); | |
753 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); | |
754 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); | |
755 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; | |
756 | ||
59cd85cb AN |
757 | /* network header is after the ethernet header */ |
758 | skb_set_network_header(skb, ETH_HLEN); | |
759 | ||
95224fe8 AN |
760 | switch (action_code) { |
761 | case WLAN_TDLS_SETUP_REQUEST: | |
762 | tf->category = WLAN_CATEGORY_TDLS; | |
763 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; | |
764 | ||
765 | skb_put(skb, sizeof(tf->u.setup_req)); | |
766 | tf->u.setup_req.dialog_token = dialog_token; | |
767 | tf->u.setup_req.capability = | |
dd8c0b03 AN |
768 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
769 | status_code)); | |
95224fe8 AN |
770 | break; |
771 | case WLAN_TDLS_SETUP_RESPONSE: | |
772 | tf->category = WLAN_CATEGORY_TDLS; | |
773 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; | |
774 | ||
775 | skb_put(skb, sizeof(tf->u.setup_resp)); | |
776 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); | |
777 | tf->u.setup_resp.dialog_token = dialog_token; | |
778 | tf->u.setup_resp.capability = | |
dd8c0b03 AN |
779 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
780 | status_code)); | |
95224fe8 AN |
781 | break; |
782 | case WLAN_TDLS_SETUP_CONFIRM: | |
783 | tf->category = WLAN_CATEGORY_TDLS; | |
784 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; | |
785 | ||
786 | skb_put(skb, sizeof(tf->u.setup_cfm)); | |
787 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); | |
788 | tf->u.setup_cfm.dialog_token = dialog_token; | |
789 | break; | |
790 | case WLAN_TDLS_TEARDOWN: | |
791 | tf->category = WLAN_CATEGORY_TDLS; | |
792 | tf->action_code = WLAN_TDLS_TEARDOWN; | |
793 | ||
794 | skb_put(skb, sizeof(tf->u.teardown)); | |
795 | tf->u.teardown.reason_code = cpu_to_le16(status_code); | |
796 | break; | |
797 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
798 | tf->category = WLAN_CATEGORY_TDLS; | |
799 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; | |
800 | ||
801 | skb_put(skb, sizeof(tf->u.discover_req)); | |
802 | tf->u.discover_req.dialog_token = dialog_token; | |
803 | break; | |
a7a6bdd0 AN |
804 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
805 | tf->category = WLAN_CATEGORY_TDLS; | |
806 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
807 | ||
808 | skb_put(skb, sizeof(tf->u.chan_switch_req)); | |
809 | break; | |
8a4d32f3 AN |
810 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
811 | tf->category = WLAN_CATEGORY_TDLS; | |
812 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
813 | ||
814 | skb_put(skb, sizeof(tf->u.chan_switch_resp)); | |
815 | tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code); | |
816 | break; | |
95224fe8 AN |
817 | default: |
818 | return -EINVAL; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | static int | |
825 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 826 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
827 | u16 status_code, struct sk_buff *skb) |
828 | { | |
829 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
830 | struct ieee80211_mgmt *mgmt; |
831 | ||
832 | mgmt = (void *)skb_put(skb, 24); | |
833 | memset(mgmt, 0, 24); | |
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 | } | |
626911cc | 955 | /* fall-through */ |
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 | } | |
626911cc | 970 | /* fall-through */ |
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: | |
1013 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); | |
1014 | skb->priority = 2; | |
1015 | break; | |
1016 | default: | |
1017 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); | |
1018 | skb->priority = 5; | |
1019 | break; | |
1020 | } | |
1021 | ||
1277b4a9 LK |
1022 | /* |
1023 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. | |
1024 | * Later, if no ACK is returned from peer, we will re-send the teardown | |
1025 | * packet through the AP. | |
1026 | */ | |
1027 | if ((action_code == WLAN_TDLS_TEARDOWN) && | |
30686bf7 | 1028 | ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
1277b4a9 LK |
1029 | bool try_resend; /* Should we keep skb for possible resend */ |
1030 | ||
1031 | /* If not sending directly to peer - no point in keeping skb */ | |
1032 | rcu_read_lock(); | |
1033 | sta = sta_info_get(sdata, peer); | |
1034 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1035 | rcu_read_unlock(); | |
1036 | ||
1037 | spin_lock_bh(&sdata->u.mgd.teardown_lock); | |
1038 | if (try_resend && !sdata->u.mgd.teardown_skb) { | |
1039 | /* Mark it as requiring TX status callback */ | |
1040 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1041 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
1042 | ||
1043 | /* | |
1044 | * skb is copied since mac80211 will later set | |
1045 | * properties that might not be the same as the AP, | |
1046 | * such as encryption, QoS, addresses, etc. | |
1047 | * | |
1048 | * No problem if skb_copy() fails, so no need to check. | |
1049 | */ | |
1050 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); | |
1051 | sdata->u.mgd.orig_teardown_skb = skb; | |
1052 | } | |
1053 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); | |
1054 | } | |
1055 | ||
95224fe8 AN |
1056 | /* disable bottom halves when entering the Tx path */ |
1057 | local_bh_disable(); | |
1277b4a9 | 1058 | __ieee80211_subif_start_xmit(skb, dev, flags); |
95224fe8 AN |
1059 | local_bh_enable(); |
1060 | ||
1061 | return ret; | |
1062 | ||
1063 | fail: | |
1064 | dev_kfree_skb(skb); | |
1065 | return ret; | |
1066 | } | |
1067 | ||
191dd469 AN |
1068 | static int |
1069 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, | |
1070 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1071 | u16 status_code, u32 peer_capability, bool initiator, | |
1072 | const u8 *extra_ies, size_t extra_ies_len) | |
17e6a59a AN |
1073 | { |
1074 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1075 | struct ieee80211_local *local = sdata->local; | |
d51c2ea3 | 1076 | enum ieee80211_smps_mode smps_mode = sdata->u.mgd.driver_smps_mode; |
17e6a59a AN |
1077 | int ret; |
1078 | ||
d51c2ea3 AN |
1079 | /* don't support setup with forced SMPS mode that's not off */ |
1080 | if (smps_mode != IEEE80211_SMPS_AUTOMATIC && | |
1081 | smps_mode != IEEE80211_SMPS_OFF) { | |
1082 | tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n", | |
1083 | smps_mode); | |
1084 | return -ENOTSUPP; | |
1085 | } | |
1086 | ||
17e6a59a AN |
1087 | mutex_lock(&local->mtx); |
1088 | ||
1089 | /* we don't support concurrent TDLS peer setups */ | |
81dd2b88 AN |
1090 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
1091 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { | |
17e6a59a | 1092 | ret = -EBUSY; |
ae2e9fba | 1093 | goto out_unlock; |
17e6a59a AN |
1094 | } |
1095 | ||
7adc3e46 AN |
1096 | /* |
1097 | * make sure we have a STA representing the peer so we drop or buffer | |
1098 | * non-TDLS-setup frames to the peer. We can't send other packets | |
6ae32e5d AN |
1099 | * during setup through the AP path. |
1100 | * Allow error packets to be sent - sometimes we don't even add a STA | |
1101 | * before failing the setup. | |
7adc3e46 | 1102 | */ |
6ae32e5d AN |
1103 | if (status_code == 0) { |
1104 | rcu_read_lock(); | |
1105 | if (!sta_info_get(sdata, peer)) { | |
1106 | rcu_read_unlock(); | |
1107 | ret = -ENOLINK; | |
ae2e9fba | 1108 | goto out_unlock; |
6ae32e5d | 1109 | } |
7adc3e46 | 1110 | rcu_read_unlock(); |
7adc3e46 | 1111 | } |
7adc3e46 | 1112 | |
3b24f4c6 | 1113 | ieee80211_flush_queues(local, sdata, false); |
ae2e9fba AN |
1114 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
1115 | mutex_unlock(&local->mtx); | |
db67d661 | 1116 | |
ae2e9fba | 1117 | /* we cannot take the mutex while preparing the setup packet */ |
17e6a59a AN |
1118 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
1119 | dialog_token, status_code, | |
2fb6b9b8 | 1120 | peer_capability, initiator, |
c2733905 AN |
1121 | extra_ies, extra_ies_len, 0, |
1122 | NULL); | |
ae2e9fba AN |
1123 | if (ret < 0) { |
1124 | mutex_lock(&local->mtx); | |
1125 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
1126 | mutex_unlock(&local->mtx); | |
1127 | return ret; | |
1128 | } | |
17e6a59a | 1129 | |
191dd469 | 1130 | ieee80211_queue_delayed_work(&sdata->local->hw, |
81dd2b88 | 1131 | &sdata->u.mgd.tdls_peer_del_work, |
191dd469 | 1132 | TDLS_PEER_SETUP_TIMEOUT); |
ae2e9fba | 1133 | return 0; |
17e6a59a | 1134 | |
ae2e9fba | 1135 | out_unlock: |
17e6a59a | 1136 | mutex_unlock(&local->mtx); |
191dd469 AN |
1137 | return ret; |
1138 | } | |
1139 | ||
db67d661 AN |
1140 | static int |
1141 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, | |
1142 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1143 | u16 status_code, u32 peer_capability, | |
1144 | bool initiator, const u8 *extra_ies, | |
1145 | size_t extra_ies_len) | |
1146 | { | |
1147 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1148 | struct ieee80211_local *local = sdata->local; | |
1149 | struct sta_info *sta; | |
1150 | int ret; | |
1151 | ||
1152 | /* | |
1153 | * No packets can be transmitted to the peer via the AP during setup - | |
1154 | * the STA is set as a TDLS peer, but is not authorized. | |
1155 | * During teardown, we prevent direct transmissions by stopping the | |
1156 | * queues and flushing all direct packets. | |
1157 | */ | |
1158 | ieee80211_stop_vif_queues(local, sdata, | |
1159 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
3b24f4c6 | 1160 | ieee80211_flush_queues(local, sdata, false); |
db67d661 AN |
1161 | |
1162 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, | |
1163 | dialog_token, status_code, | |
1164 | peer_capability, initiator, | |
c2733905 AN |
1165 | extra_ies, extra_ies_len, 0, |
1166 | NULL); | |
db67d661 AN |
1167 | if (ret < 0) |
1168 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", | |
1169 | ret); | |
1170 | ||
1171 | /* | |
1172 | * Remove the STA AUTH flag to force further traffic through the AP. If | |
1173 | * the STA was unreachable, it was already removed. | |
1174 | */ | |
1175 | rcu_read_lock(); | |
1176 | sta = sta_info_get(sdata, peer); | |
1177 | if (sta) | |
1178 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1179 | rcu_read_unlock(); | |
1180 | ||
1181 | ieee80211_wake_vif_queues(local, sdata, | |
1182 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | ||
191dd469 AN |
1187 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
1188 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1189 | u16 status_code, u32 peer_capability, | |
1190 | bool initiator, const u8 *extra_ies, | |
1191 | size_t extra_ies_len) | |
1192 | { | |
1193 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1194 | int ret; | |
1195 | ||
1196 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1197 | return -ENOTSUPP; | |
1198 | ||
1199 | /* make sure we are in managed mode, and associated */ | |
1200 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
1201 | !sdata->u.mgd.associated) | |
1202 | return -EINVAL; | |
1203 | ||
1204 | switch (action_code) { | |
1205 | case WLAN_TDLS_SETUP_REQUEST: | |
1206 | case WLAN_TDLS_SETUP_RESPONSE: | |
1207 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, | |
1208 | dialog_token, status_code, | |
1209 | peer_capability, initiator, | |
1210 | extra_ies, extra_ies_len); | |
1211 | break; | |
1212 | case WLAN_TDLS_TEARDOWN: | |
db67d661 AN |
1213 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
1214 | action_code, dialog_token, | |
1215 | status_code, | |
1216 | peer_capability, initiator, | |
1217 | extra_ies, extra_ies_len); | |
1218 | break; | |
191dd469 | 1219 | case WLAN_TDLS_DISCOVERY_REQUEST: |
ee10f2c7 AN |
1220 | /* |
1221 | * Protect the discovery so we can hear the TDLS discovery | |
1222 | * response frame. It is transmitted directly and not buffered | |
1223 | * by the AP. | |
1224 | */ | |
1225 | drv_mgd_protect_tdls_discover(sdata->local, sdata); | |
1226 | /* fall-through */ | |
1227 | case WLAN_TDLS_SETUP_CONFIRM: | |
191dd469 AN |
1228 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
1229 | /* no special handling */ | |
1230 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, | |
1231 | action_code, | |
1232 | dialog_token, | |
1233 | status_code, | |
1234 | peer_capability, | |
1235 | initiator, extra_ies, | |
c2733905 | 1236 | extra_ies_len, 0, NULL); |
191dd469 AN |
1237 | break; |
1238 | default: | |
1239 | ret = -EOPNOTSUPP; | |
1240 | break; | |
1241 | } | |
17e6a59a AN |
1242 | |
1243 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", | |
1244 | action_code, peer, ret); | |
1245 | return ret; | |
1246 | } | |
1247 | ||
59021c67 AN |
1248 | static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata, |
1249 | struct sta_info *sta) | |
0fabfaaf AN |
1250 | { |
1251 | struct ieee80211_local *local = sdata->local; | |
1252 | struct ieee80211_chanctx_conf *conf; | |
1253 | struct ieee80211_chanctx *ctx; | |
59021c67 AN |
1254 | enum nl80211_chan_width width; |
1255 | struct ieee80211_supported_band *sband; | |
0fabfaaf AN |
1256 | |
1257 | mutex_lock(&local->chanctx_mtx); | |
1258 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1259 | lockdep_is_held(&local->chanctx_mtx)); | |
1260 | if (conf) { | |
59021c67 AN |
1261 | width = conf->def.width; |
1262 | sband = local->hw.wiphy->bands[conf->def.chan->band]; | |
0fabfaaf AN |
1263 | ctx = container_of(conf, struct ieee80211_chanctx, conf); |
1264 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
59021c67 AN |
1265 | |
1266 | /* if width changed and a peer is given, update its BW */ | |
1267 | if (width != conf->def.width && sta && | |
1268 | test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) { | |
1269 | enum ieee80211_sta_rx_bandwidth bw; | |
1270 | ||
1271 | bw = ieee80211_chan_width_to_rx_bw(conf->def.width); | |
1272 | bw = min(bw, ieee80211_sta_cap_rx_bw(sta)); | |
1273 | if (bw != sta->sta.bandwidth) { | |
1274 | sta->sta.bandwidth = bw; | |
1275 | rate_control_rate_update(local, sband, sta, | |
1276 | IEEE80211_RC_BW_CHANGED); | |
1277 | /* | |
1278 | * if a TDLS peer BW was updated, we need to | |
1279 | * recalc the chandef width again, to get the | |
1280 | * correct chanctx min_def | |
1281 | */ | |
1282 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1283 | } | |
1284 | } | |
1285 | ||
0fabfaaf AN |
1286 | } |
1287 | mutex_unlock(&local->chanctx_mtx); | |
1288 | } | |
1289 | ||
22f66895 AA |
1290 | static int iee80211_tdls_have_ht_peers(struct ieee80211_sub_if_data *sdata) |
1291 | { | |
1292 | struct sta_info *sta; | |
1293 | bool result = false; | |
1294 | ||
1295 | rcu_read_lock(); | |
1296 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1297 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1298 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED) || | |
1299 | !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH) || | |
1300 | !sta->sta.ht_cap.ht_supported) | |
1301 | continue; | |
1302 | result = true; | |
1303 | break; | |
1304 | } | |
1305 | rcu_read_unlock(); | |
1306 | ||
1307 | return result; | |
1308 | } | |
1309 | ||
1310 | static void | |
1311 | iee80211_tdls_recalc_ht_protection(struct ieee80211_sub_if_data *sdata, | |
1312 | struct sta_info *sta) | |
1313 | { | |
1314 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
1315 | bool tdls_ht; | |
1316 | u16 protection = IEEE80211_HT_OP_MODE_PROTECTION_NONHT_MIXED | | |
1317 | IEEE80211_HT_OP_MODE_NON_GF_STA_PRSNT | | |
1318 | IEEE80211_HT_OP_MODE_NON_HT_STA_PRSNT; | |
1319 | u16 opmode; | |
1320 | ||
1321 | /* Nothing to do if the BSS connection uses HT */ | |
1322 | if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) | |
1323 | return; | |
1324 | ||
1325 | tdls_ht = (sta && sta->sta.ht_cap.ht_supported) || | |
1326 | iee80211_tdls_have_ht_peers(sdata); | |
1327 | ||
1328 | opmode = sdata->vif.bss_conf.ht_operation_mode; | |
1329 | ||
1330 | if (tdls_ht) | |
1331 | opmode |= protection; | |
1332 | else | |
1333 | opmode &= ~protection; | |
1334 | ||
1335 | if (opmode == sdata->vif.bss_conf.ht_operation_mode) | |
1336 | return; | |
1337 | ||
1338 | sdata->vif.bss_conf.ht_operation_mode = opmode; | |
1339 | ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT); | |
1340 | } | |
1341 | ||
95224fe8 | 1342 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
3b3a0162 | 1343 | const u8 *peer, enum nl80211_tdls_operation oper) |
95224fe8 AN |
1344 | { |
1345 | struct sta_info *sta; | |
1346 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
17e6a59a AN |
1347 | struct ieee80211_local *local = sdata->local; |
1348 | int ret; | |
95224fe8 AN |
1349 | |
1350 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1351 | return -ENOTSUPP; | |
1352 | ||
1353 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1354 | return -EINVAL; | |
1355 | ||
17e6a59a AN |
1356 | switch (oper) { |
1357 | case NL80211_TDLS_ENABLE_LINK: | |
1358 | case NL80211_TDLS_DISABLE_LINK: | |
1359 | break; | |
1360 | case NL80211_TDLS_TEARDOWN: | |
1361 | case NL80211_TDLS_SETUP: | |
1362 | case NL80211_TDLS_DISCOVERY_REQ: | |
1363 | /* We don't support in-driver setup/teardown/discovery */ | |
1364 | return -ENOTSUPP; | |
1365 | } | |
1366 | ||
22f66895 AA |
1367 | /* protect possible bss_conf changes and avoid concurrency in |
1368 | * ieee80211_bss_info_change_notify() | |
1369 | */ | |
1370 | sdata_lock(sdata); | |
17e6a59a | 1371 | mutex_lock(&local->mtx); |
95224fe8 AN |
1372 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
1373 | ||
1374 | switch (oper) { | |
1375 | case NL80211_TDLS_ENABLE_LINK: | |
c5a71688 AN |
1376 | if (sdata->vif.csa_active) { |
1377 | tdls_dbg(sdata, "TDLS: disallow link during CSA\n"); | |
1378 | ret = -EBUSY; | |
1379 | break; | |
1380 | } | |
1381 | ||
22f66895 | 1382 | mutex_lock(&local->sta_mtx); |
95224fe8 AN |
1383 | sta = sta_info_get(sdata, peer); |
1384 | if (!sta) { | |
22f66895 | 1385 | mutex_unlock(&local->sta_mtx); |
17e6a59a AN |
1386 | ret = -ENOLINK; |
1387 | break; | |
95224fe8 AN |
1388 | } |
1389 | ||
59021c67 | 1390 | iee80211_tdls_recalc_chanctx(sdata, sta); |
22f66895 AA |
1391 | iee80211_tdls_recalc_ht_protection(sdata, sta); |
1392 | ||
95224fe8 | 1393 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); |
22f66895 | 1394 | mutex_unlock(&local->sta_mtx); |
17e6a59a | 1395 | |
81dd2b88 AN |
1396 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
1397 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); | |
17e6a59a | 1398 | ret = 0; |
95224fe8 AN |
1399 | break; |
1400 | case NL80211_TDLS_DISABLE_LINK: | |
bb3f8486 LK |
1401 | /* |
1402 | * The teardown message in ieee80211_tdls_mgmt_teardown() was | |
1403 | * created while the queues were stopped, so it might still be | |
1404 | * pending. Before flushing the queues we need to be sure the | |
1405 | * message is handled by the tasklet handling pending messages, | |
1406 | * otherwise we might start destroying the station before | |
1407 | * sending the teardown packet. | |
1408 | * Note that this only forces the tasklet to flush pendings - | |
1409 | * not to stop the tasklet from rescheduling itself. | |
1410 | */ | |
1411 | tasklet_kill(&local->tx_pending_tasklet); | |
db67d661 | 1412 | /* flush a potentially queued teardown packet */ |
3b24f4c6 | 1413 | ieee80211_flush_queues(local, sdata, false); |
db67d661 | 1414 | |
17e6a59a | 1415 | ret = sta_info_destroy_addr(sdata, peer); |
22f66895 AA |
1416 | |
1417 | mutex_lock(&local->sta_mtx); | |
1418 | iee80211_tdls_recalc_ht_protection(sdata, NULL); | |
1419 | mutex_unlock(&local->sta_mtx); | |
1420 | ||
59021c67 | 1421 | iee80211_tdls_recalc_chanctx(sdata, NULL); |
17e6a59a | 1422 | break; |
95224fe8 | 1423 | default: |
17e6a59a AN |
1424 | ret = -ENOTSUPP; |
1425 | break; | |
95224fe8 AN |
1426 | } |
1427 | ||
81dd2b88 AN |
1428 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
1429 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); | |
1430 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
1431 | } |
1432 | ||
d51c2ea3 AN |
1433 | if (ret == 0) |
1434 | ieee80211_queue_work(&sdata->local->hw, | |
1435 | &sdata->u.mgd.request_smps_work); | |
1436 | ||
17e6a59a | 1437 | mutex_unlock(&local->mtx); |
22f66895 | 1438 | sdata_unlock(sdata); |
17e6a59a | 1439 | return ret; |
95224fe8 | 1440 | } |
c887f0d3 AN |
1441 | |
1442 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, | |
1443 | enum nl80211_tdls_operation oper, | |
1444 | u16 reason_code, gfp_t gfp) | |
1445 | { | |
1446 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1447 | ||
1448 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { | |
1449 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", | |
1450 | oper); | |
1451 | return; | |
1452 | } | |
1453 | ||
1454 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); | |
1455 | } | |
1456 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); | |
a7a6bdd0 AN |
1457 | |
1458 | static void | |
1459 | iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout) | |
1460 | { | |
1461 | struct ieee80211_ch_switch_timing *ch_sw; | |
1462 | ||
1463 | *buf++ = WLAN_EID_CHAN_SWITCH_TIMING; | |
1464 | *buf++ = sizeof(struct ieee80211_ch_switch_timing); | |
1465 | ||
1466 | ch_sw = (void *)buf; | |
1467 | ch_sw->switch_time = cpu_to_le16(switch_time); | |
1468 | ch_sw->switch_timeout = cpu_to_le16(switch_timeout); | |
1469 | } | |
1470 | ||
1471 | /* find switch timing IE in SKB ready for Tx */ | |
1472 | static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb) | |
1473 | { | |
1474 | struct ieee80211_tdls_data *tf; | |
1475 | const u8 *ie_start; | |
1476 | ||
1477 | /* | |
1478 | * Get the offset for the new location of the switch timing IE. | |
1479 | * The SKB network header will now point to the "payload_type" | |
1480 | * element of the TDLS data frame struct. | |
1481 | */ | |
1482 | tf = container_of(skb->data + skb_network_offset(skb), | |
1483 | struct ieee80211_tdls_data, payload_type); | |
1484 | ie_start = tf->u.chan_switch_req.variable; | |
1485 | return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start, | |
1486 | skb->len - (ie_start - skb->data)); | |
1487 | } | |
1488 | ||
1489 | static struct sk_buff * | |
1490 | ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class, | |
1491 | struct cfg80211_chan_def *chandef, | |
1492 | u32 *ch_sw_tm_ie_offset) | |
1493 | { | |
1494 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1495 | u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
1496 | 2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1497 | int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing); | |
1498 | u8 *pos = extra_ies; | |
1499 | struct sk_buff *skb; | |
1500 | ||
1501 | /* | |
1502 | * if chandef points to a wide channel add a Secondary-Channel | |
1503 | * Offset information element | |
1504 | */ | |
1505 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1506 | struct ieee80211_sec_chan_offs_ie *sec_chan_ie; | |
1507 | bool ht40plus; | |
1508 | ||
1509 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; | |
1510 | *pos++ = sizeof(*sec_chan_ie); | |
1511 | sec_chan_ie = (void *)pos; | |
1512 | ||
1513 | ht40plus = cfg80211_get_chandef_type(chandef) == | |
1514 | NL80211_CHAN_HT40PLUS; | |
1515 | sec_chan_ie->sec_chan_offs = ht40plus ? | |
1516 | IEEE80211_HT_PARAM_CHA_SEC_ABOVE : | |
1517 | IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1518 | pos += sizeof(*sec_chan_ie); | |
1519 | ||
1520 | extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
1521 | } | |
1522 | ||
1523 | /* just set the values to 0, this is a template */ | |
1524 | iee80211_tdls_add_ch_switch_timing(pos, 0, 0); | |
1525 | ||
1526 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1527 | WLAN_TDLS_CHANNEL_SWITCH_REQUEST, | |
1528 | 0, 0, !sta->sta.tdls_initiator, | |
1529 | extra_ies, extra_ies_len, | |
1530 | oper_class, chandef); | |
1531 | if (!skb) | |
1532 | return NULL; | |
1533 | ||
1534 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1535 | if (IS_ERR(skb)) { | |
1536 | tdls_dbg(sdata, "Failed building TDLS channel switch frame\n"); | |
1537 | return NULL; | |
1538 | } | |
1539 | ||
1540 | if (ch_sw_tm_ie_offset) { | |
1541 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1542 | ||
1543 | if (!tm_ie) { | |
1544 | tdls_dbg(sdata, "No switch timing IE in TDLS switch\n"); | |
1545 | dev_kfree_skb_any(skb); | |
1546 | return NULL; | |
1547 | } | |
1548 | ||
1549 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1550 | } | |
1551 | ||
1552 | tdls_dbg(sdata, | |
1553 | "TDLS channel switch request template for %pM ch %d width %d\n", | |
1554 | sta->sta.addr, chandef->chan->center_freq, chandef->width); | |
1555 | return skb; | |
1556 | } | |
1557 | ||
1558 | int | |
1559 | ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, | |
1560 | const u8 *addr, u8 oper_class, | |
1561 | struct cfg80211_chan_def *chandef) | |
1562 | { | |
1563 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1564 | struct ieee80211_local *local = sdata->local; | |
1565 | struct sta_info *sta; | |
1566 | struct sk_buff *skb = NULL; | |
1567 | u32 ch_sw_tm_ie; | |
1568 | int ret; | |
1569 | ||
1570 | mutex_lock(&local->sta_mtx); | |
1571 | sta = sta_info_get(sdata, addr); | |
1572 | if (!sta) { | |
1573 | tdls_dbg(sdata, | |
1574 | "Invalid TDLS peer %pM for channel switch request\n", | |
1575 | addr); | |
1576 | ret = -ENOENT; | |
1577 | goto out; | |
1578 | } | |
1579 | ||
1580 | if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) { | |
1581 | tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n", | |
1582 | addr); | |
1583 | ret = -ENOTSUPP; | |
1584 | goto out; | |
1585 | } | |
1586 | ||
1587 | skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef, | |
1588 | &ch_sw_tm_ie); | |
1589 | if (!skb) { | |
1590 | ret = -ENOENT; | |
1591 | goto out; | |
1592 | } | |
1593 | ||
1594 | ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class, | |
1595 | chandef, skb, ch_sw_tm_ie); | |
1596 | if (!ret) | |
1597 | set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1598 | ||
1599 | out: | |
1600 | mutex_unlock(&local->sta_mtx); | |
1601 | dev_kfree_skb_any(skb); | |
1602 | return ret; | |
1603 | } | |
1604 | ||
1605 | void | |
1606 | ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, | |
1607 | struct net_device *dev, | |
1608 | const u8 *addr) | |
1609 | { | |
1610 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1611 | struct ieee80211_local *local = sdata->local; | |
1612 | struct sta_info *sta; | |
1613 | ||
1614 | mutex_lock(&local->sta_mtx); | |
1615 | sta = sta_info_get(sdata, addr); | |
1616 | if (!sta) { | |
1617 | tdls_dbg(sdata, | |
1618 | "Invalid TDLS peer %pM for channel switch cancel\n", | |
1619 | addr); | |
1620 | goto out; | |
1621 | } | |
1622 | ||
1623 | if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
1624 | tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n", | |
1625 | addr); | |
1626 | goto out; | |
1627 | } | |
1628 | ||
1629 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
1630 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1631 | ||
1632 | out: | |
1633 | mutex_unlock(&local->sta_mtx); | |
1634 | } | |
8a4d32f3 AN |
1635 | |
1636 | static struct sk_buff * | |
1637 | ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta, | |
1638 | u32 *ch_sw_tm_ie_offset) | |
1639 | { | |
1640 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1641 | struct sk_buff *skb; | |
1642 | u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1643 | ||
1644 | /* initial timing are always zero in the template */ | |
1645 | iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0); | |
1646 | ||
1647 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1648 | WLAN_TDLS_CHANNEL_SWITCH_RESPONSE, | |
1649 | 0, 0, !sta->sta.tdls_initiator, | |
1650 | extra_ies, sizeof(extra_ies), 0, NULL); | |
1651 | if (!skb) | |
1652 | return NULL; | |
1653 | ||
1654 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1655 | if (IS_ERR(skb)) { | |
1656 | tdls_dbg(sdata, | |
1657 | "Failed building TDLS channel switch resp frame\n"); | |
1658 | return NULL; | |
1659 | } | |
1660 | ||
1661 | if (ch_sw_tm_ie_offset) { | |
1662 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1663 | ||
1664 | if (!tm_ie) { | |
1665 | tdls_dbg(sdata, | |
1666 | "No switch timing IE in TDLS switch resp\n"); | |
1667 | dev_kfree_skb_any(skb); | |
1668 | return NULL; | |
1669 | } | |
1670 | ||
1671 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1672 | } | |
1673 | ||
1674 | tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n", | |
1675 | sta->sta.addr); | |
1676 | return skb; | |
1677 | } | |
1678 | ||
1679 | static int | |
1680 | ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, | |
1681 | struct sk_buff *skb) | |
1682 | { | |
1683 | struct ieee80211_local *local = sdata->local; | |
1684 | struct ieee802_11_elems elems; | |
1685 | struct sta_info *sta; | |
1686 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1687 | bool local_initiator; | |
1688 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1689 | int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable); | |
1690 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1691 | int ret; | |
1692 | ||
1693 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
1694 | params.timestamp = rx_status->device_timestamp; | |
1695 | ||
1696 | if (skb->len < baselen) { | |
1697 | tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n", | |
1698 | skb->len); | |
1699 | return -EINVAL; | |
1700 | } | |
1701 | ||
1702 | mutex_lock(&local->sta_mtx); | |
1703 | sta = sta_info_get(sdata, tf->sa); | |
1704 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1705 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1706 | tf->sa); | |
1707 | ret = -EINVAL; | |
1708 | goto out; | |
1709 | } | |
1710 | ||
1711 | params.sta = &sta->sta; | |
1712 | params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code); | |
1713 | if (params.status != 0) { | |
1714 | ret = 0; | |
1715 | goto call_drv; | |
1716 | } | |
1717 | ||
1718 | ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, | |
1719 | skb->len - baselen, false, &elems); | |
1720 | if (elems.parse_error) { | |
1721 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); | |
1722 | ret = -EINVAL; | |
1723 | goto out; | |
1724 | } | |
1725 | ||
1726 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1727 | tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); | |
1728 | ret = -EINVAL; | |
1729 | goto out; | |
1730 | } | |
1731 | ||
1732 | /* validate the initiator is set correctly */ | |
1733 | local_initiator = | |
1734 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1735 | if (local_initiator == sta->sta.tdls_initiator) { | |
1736 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1737 | ret = -EINVAL; | |
1738 | goto out; | |
1739 | } | |
1740 | ||
1741 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1742 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1743 | ||
1744 | params.tmpl_skb = | |
1745 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); | |
1746 | if (!params.tmpl_skb) { | |
1747 | ret = -ENOENT; | |
1748 | goto out; | |
1749 | } | |
1750 | ||
49708e37 | 1751 | ret = 0; |
8a4d32f3 AN |
1752 | call_drv: |
1753 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1754 | ||
1755 | tdls_dbg(sdata, | |
1756 | "TDLS channel switch response received from %pM status %d\n", | |
1757 | tf->sa, params.status); | |
1758 | ||
1759 | out: | |
1760 | mutex_unlock(&local->sta_mtx); | |
1761 | dev_kfree_skb_any(params.tmpl_skb); | |
1762 | return ret; | |
1763 | } | |
1764 | ||
1765 | static int | |
1766 | ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, | |
1767 | struct sk_buff *skb) | |
1768 | { | |
1769 | struct ieee80211_local *local = sdata->local; | |
1770 | struct ieee802_11_elems elems; | |
1771 | struct cfg80211_chan_def chandef; | |
1772 | struct ieee80211_channel *chan; | |
1773 | enum nl80211_channel_type chan_type; | |
1774 | int freq; | |
1775 | u8 target_channel, oper_class; | |
1776 | bool local_initiator; | |
1777 | struct sta_info *sta; | |
57fbcce3 | 1778 | enum nl80211_band band; |
8a4d32f3 AN |
1779 | struct ieee80211_tdls_data *tf = (void *)skb->data; |
1780 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1781 | int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable); | |
1782 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1783 | int ret = 0; | |
1784 | ||
1785 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
1786 | params.timestamp = rx_status->device_timestamp; | |
1787 | ||
1788 | if (skb->len < baselen) { | |
1789 | tdls_dbg(sdata, "TDLS channel switch req too short: %d\n", | |
1790 | skb->len); | |
1791 | return -EINVAL; | |
1792 | } | |
1793 | ||
1794 | target_channel = tf->u.chan_switch_req.target_channel; | |
1795 | oper_class = tf->u.chan_switch_req.oper_class; | |
1796 | ||
1797 | /* | |
1798 | * We can't easily infer the channel band. The operating class is | |
1799 | * ambiguous - there are multiple tables (US/Europe/JP/Global). The | |
1800 | * solution here is to treat channels with number >14 as 5GHz ones, | |
1801 | * and specifically check for the (oper_class, channel) combinations | |
1802 | * where this doesn't hold. These are thankfully unique according to | |
1803 | * IEEE802.11-2012. | |
1804 | * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as | |
1805 | * valid here. | |
1806 | */ | |
1807 | if ((oper_class == 112 || oper_class == 2 || oper_class == 3 || | |
1808 | oper_class == 4 || oper_class == 5 || oper_class == 6) && | |
1809 | target_channel < 14) | |
57fbcce3 | 1810 | band = NL80211_BAND_5GHZ; |
8a4d32f3 | 1811 | else |
57fbcce3 JB |
1812 | band = target_channel < 14 ? NL80211_BAND_2GHZ : |
1813 | NL80211_BAND_5GHZ; | |
8a4d32f3 AN |
1814 | |
1815 | freq = ieee80211_channel_to_frequency(target_channel, band); | |
1816 | if (freq == 0) { | |
1817 | tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n", | |
1818 | target_channel); | |
1819 | return -EINVAL; | |
1820 | } | |
1821 | ||
1822 | chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); | |
1823 | if (!chan) { | |
1824 | tdls_dbg(sdata, | |
1825 | "Unsupported channel for TDLS chan switch: %d\n", | |
1826 | target_channel); | |
1827 | return -EINVAL; | |
1828 | } | |
1829 | ||
1830 | ieee802_11_parse_elems(tf->u.chan_switch_req.variable, | |
1831 | skb->len - baselen, false, &elems); | |
1832 | if (elems.parse_error) { | |
1833 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); | |
1834 | return -EINVAL; | |
1835 | } | |
1836 | ||
1837 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1838 | tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); | |
1839 | return -EINVAL; | |
1840 | } | |
1841 | ||
42d8d789 AN |
1842 | if (!elems.sec_chan_offs) { |
1843 | chan_type = NL80211_CHAN_HT20; | |
1844 | } else { | |
1845 | switch (elems.sec_chan_offs->sec_chan_offs) { | |
1846 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1847 | chan_type = NL80211_CHAN_HT40PLUS; | |
1848 | break; | |
1849 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1850 | chan_type = NL80211_CHAN_HT40MINUS; | |
1851 | break; | |
1852 | default: | |
1853 | chan_type = NL80211_CHAN_HT20; | |
1854 | break; | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | cfg80211_chandef_create(&chandef, chan, chan_type); | |
1859 | ||
1860 | /* we will be active on the TDLS link */ | |
1861 | if (!cfg80211_reg_can_beacon_relax(sdata->local->hw.wiphy, &chandef, | |
1862 | sdata->wdev.iftype)) { | |
1863 | tdls_dbg(sdata, "TDLS chan switch to forbidden channel\n"); | |
1864 | return -EINVAL; | |
1865 | } | |
1866 | ||
8a4d32f3 AN |
1867 | mutex_lock(&local->sta_mtx); |
1868 | sta = sta_info_get(sdata, tf->sa); | |
1869 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1870 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1871 | tf->sa); | |
1872 | ret = -EINVAL; | |
1873 | goto out; | |
1874 | } | |
1875 | ||
1876 | params.sta = &sta->sta; | |
1877 | ||
1878 | /* validate the initiator is set correctly */ | |
1879 | local_initiator = | |
1880 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1881 | if (local_initiator == sta->sta.tdls_initiator) { | |
1882 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1883 | ret = -EINVAL; | |
1884 | goto out; | |
1885 | } | |
1886 | ||
42d8d789 AN |
1887 | /* peer should have known better */ |
1888 | if (!sta->sta.ht_cap.ht_supported && elems.sec_chan_offs && | |
1889 | elems.sec_chan_offs->sec_chan_offs) { | |
1890 | tdls_dbg(sdata, "TDLS chan switch - wide chan unsupported\n"); | |
1891 | ret = -ENOTSUPP; | |
1892 | goto out; | |
8a4d32f3 AN |
1893 | } |
1894 | ||
8a4d32f3 | 1895 | params.chandef = &chandef; |
8a4d32f3 AN |
1896 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); |
1897 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1898 | ||
1899 | params.tmpl_skb = | |
1900 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, | |
1901 | ¶ms.ch_sw_tm_ie); | |
1902 | if (!params.tmpl_skb) { | |
1903 | ret = -ENOENT; | |
1904 | goto out; | |
1905 | } | |
1906 | ||
1907 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1908 | ||
1909 | tdls_dbg(sdata, | |
1910 | "TDLS ch switch request received from %pM ch %d width %d\n", | |
1911 | tf->sa, params.chandef->chan->center_freq, | |
1912 | params.chandef->width); | |
1913 | out: | |
1914 | mutex_unlock(&local->sta_mtx); | |
1915 | dev_kfree_skb_any(params.tmpl_skb); | |
1916 | return ret; | |
1917 | } | |
1918 | ||
c8ff71e6 AN |
1919 | static void |
1920 | ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, | |
1921 | struct sk_buff *skb) | |
8a4d32f3 AN |
1922 | { |
1923 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1924 | struct wiphy *wiphy = sdata->local->hw.wiphy; | |
1925 | ||
c8ff71e6 AN |
1926 | ASSERT_RTNL(); |
1927 | ||
8a4d32f3 AN |
1928 | /* make sure the driver supports it */ |
1929 | if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH)) | |
1930 | return; | |
1931 | ||
1932 | /* we want to access the entire packet */ | |
1933 | if (skb_linearize(skb)) | |
1934 | return; | |
1935 | /* | |
1936 | * The packet/size was already validated by mac80211 Rx path, only look | |
1937 | * at the action type. | |
1938 | */ | |
1939 | switch (tf->action_code) { | |
1940 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: | |
1941 | ieee80211_process_tdls_channel_switch_req(sdata, skb); | |
1942 | break; | |
1943 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: | |
1944 | ieee80211_process_tdls_channel_switch_resp(sdata, skb); | |
1945 | break; | |
1946 | default: | |
1947 | WARN_ON_ONCE(1); | |
1948 | return; | |
1949 | } | |
1950 | } | |
d51c2ea3 AN |
1951 | |
1952 | void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) | |
1953 | { | |
1954 | struct sta_info *sta; | |
1955 | u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED; | |
1956 | ||
1957 | rcu_read_lock(); | |
1958 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1959 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1960 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1961 | continue; | |
1962 | ||
1963 | ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr, | |
1964 | NL80211_TDLS_TEARDOWN, reason, | |
1965 | GFP_ATOMIC); | |
1966 | } | |
1967 | rcu_read_unlock(); | |
1968 | } | |
c8ff71e6 AN |
1969 | |
1970 | void ieee80211_tdls_chsw_work(struct work_struct *wk) | |
1971 | { | |
1972 | struct ieee80211_local *local = | |
1973 | container_of(wk, struct ieee80211_local, tdls_chsw_work); | |
1974 | struct ieee80211_sub_if_data *sdata; | |
1975 | struct sk_buff *skb; | |
1976 | struct ieee80211_tdls_data *tf; | |
1977 | ||
1978 | rtnl_lock(); | |
1979 | while ((skb = skb_dequeue(&local->skb_queue_tdls_chsw))) { | |
1980 | tf = (struct ieee80211_tdls_data *)skb->data; | |
1981 | list_for_each_entry(sdata, &local->interfaces, list) { | |
1982 | if (!ieee80211_sdata_running(sdata) || | |
1983 | sdata->vif.type != NL80211_IFTYPE_STATION || | |
1984 | !ether_addr_equal(tf->da, sdata->vif.addr)) | |
1985 | continue; | |
1986 | ||
1987 | ieee80211_process_tdls_channel_switch(sdata, skb); | |
1988 | break; | |
1989 | } | |
1990 | ||
1991 | kfree_skb(skb); | |
1992 | } | |
1993 | rtnl_unlock(); | |
1994 | } |