Commit | Line | Data |
---|---|---|
95224fe8 AN |
1 | /* |
2 | * mac80211 TDLS handling code | |
3 | * | |
4 | * Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net> | |
5 | * Copyright 2014, Intel Corporation | |
d98ad83e | 6 | * Copyright 2014 Intel Mobile Communications GmbH |
d51c2ea3 | 7 | * Copyright 2015 Intel Deutschland GmbH |
95224fe8 AN |
8 | * |
9 | * This file is GPLv2 as found in COPYING. | |
10 | */ | |
11 | ||
12 | #include <linux/ieee80211.h> | |
6f7eaa47 | 13 | #include <linux/log2.h> |
c887f0d3 | 14 | #include <net/cfg80211.h> |
95224fe8 | 15 | #include "ieee80211_i.h" |
ee10f2c7 | 16 | #include "driver-ops.h" |
95224fe8 | 17 | |
17e6a59a AN |
18 | /* give usermode some time for retries in setting up the TDLS session */ |
19 | #define TDLS_PEER_SETUP_TIMEOUT (15 * HZ) | |
20 | ||
21 | void ieee80211_tdls_peer_del_work(struct work_struct *wk) | |
22 | { | |
23 | struct ieee80211_sub_if_data *sdata; | |
24 | struct ieee80211_local *local; | |
25 | ||
26 | sdata = container_of(wk, struct ieee80211_sub_if_data, | |
81dd2b88 | 27 | u.mgd.tdls_peer_del_work.work); |
17e6a59a AN |
28 | local = sdata->local; |
29 | ||
30 | mutex_lock(&local->mtx); | |
81dd2b88 AN |
31 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer)) { |
32 | tdls_dbg(sdata, "TDLS del peer %pM\n", sdata->u.mgd.tdls_peer); | |
33 | sta_info_destroy_addr(sdata, sdata->u.mgd.tdls_peer); | |
34 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
35 | } |
36 | mutex_unlock(&local->mtx); | |
37 | } | |
38 | ||
b98fb44f | 39 | static void ieee80211_tdls_add_ext_capab(struct ieee80211_sub_if_data *sdata, |
78632a17 | 40 | struct sk_buff *skb) |
95224fe8 | 41 | { |
b98fb44f | 42 | struct ieee80211_local *local = sdata->local; |
78632a17 AN |
43 | bool chan_switch = local->hw.wiphy->features & |
44 | NL80211_FEATURE_TDLS_CHANNEL_SWITCH; | |
b98fb44f AN |
45 | bool wider_band = ieee80211_hw_check(&local->hw, TDLS_WIDER_BW); |
46 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
47 | struct ieee80211_supported_band *sband = local->hw.wiphy->bands[band]; | |
48 | bool vht = sband && sband->vht_cap.vht_supported; | |
49 | u8 *pos = (void *)skb_put(skb, 10); | |
95224fe8 AN |
50 | |
51 | *pos++ = WLAN_EID_EXT_CAPABILITY; | |
b98fb44f | 52 | *pos++ = 8; /* len */ |
95224fe8 AN |
53 | *pos++ = 0x0; |
54 | *pos++ = 0x0; | |
55 | *pos++ = 0x0; | |
78632a17 | 56 | *pos++ = chan_switch ? WLAN_EXT_CAPA4_TDLS_CHAN_SWITCH : 0; |
95224fe8 | 57 | *pos++ = WLAN_EXT_CAPA5_TDLS_ENABLED; |
b98fb44f AN |
58 | *pos++ = 0; |
59 | *pos++ = 0; | |
60 | *pos++ = (vht && wider_band) ? WLAN_EXT_CAPA8_TDLS_WIDE_BW_ENABLED : 0; | |
95224fe8 AN |
61 | } |
62 | ||
f0d29cb9 AN |
63 | static u8 |
64 | ieee80211_tdls_add_subband(struct ieee80211_sub_if_data *sdata, | |
65 | struct sk_buff *skb, u16 start, u16 end, | |
66 | u16 spacing) | |
67 | { | |
68 | u8 subband_cnt = 0, ch_cnt = 0; | |
69 | struct ieee80211_channel *ch; | |
70 | struct cfg80211_chan_def chandef; | |
71 | int i, subband_start; | |
923b352f | 72 | struct wiphy *wiphy = sdata->local->hw.wiphy; |
f0d29cb9 AN |
73 | |
74 | for (i = start; i <= end; i += spacing) { | |
75 | if (!ch_cnt) | |
76 | subband_start = i; | |
77 | ||
78 | ch = ieee80211_get_channel(sdata->local->hw.wiphy, i); | |
79 | if (ch) { | |
80 | /* we will be active on the channel */ | |
f0d29cb9 | 81 | cfg80211_chandef_create(&chandef, ch, |
50075892 | 82 | NL80211_CHAN_NO_HT); |
923b352f AN |
83 | if (cfg80211_reg_can_beacon_relax(wiphy, &chandef, |
84 | sdata->wdev.iftype)) { | |
f0d29cb9 | 85 | ch_cnt++; |
50075892 AN |
86 | /* |
87 | * check if the next channel is also part of | |
88 | * this allowed range | |
89 | */ | |
f0d29cb9 AN |
90 | continue; |
91 | } | |
92 | } | |
93 | ||
50075892 AN |
94 | /* |
95 | * we've reached the end of a range, with allowed channels | |
96 | * found | |
97 | */ | |
f0d29cb9 AN |
98 | if (ch_cnt) { |
99 | u8 *pos = skb_put(skb, 2); | |
100 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
101 | *pos++ = ch_cnt; | |
102 | ||
103 | subband_cnt++; | |
104 | ch_cnt = 0; | |
105 | } | |
106 | } | |
107 | ||
50075892 AN |
108 | /* all channels in the requested range are allowed - add them here */ |
109 | if (ch_cnt) { | |
110 | u8 *pos = skb_put(skb, 2); | |
111 | *pos++ = ieee80211_frequency_to_channel(subband_start); | |
112 | *pos++ = ch_cnt; | |
113 | ||
114 | subband_cnt++; | |
115 | } | |
116 | ||
f0d29cb9 AN |
117 | return subband_cnt; |
118 | } | |
119 | ||
120 | static void | |
121 | ieee80211_tdls_add_supp_channels(struct ieee80211_sub_if_data *sdata, | |
122 | struct sk_buff *skb) | |
123 | { | |
124 | /* | |
125 | * Add possible channels for TDLS. These are channels that are allowed | |
126 | * to be active. | |
127 | */ | |
128 | u8 subband_cnt; | |
129 | u8 *pos = skb_put(skb, 2); | |
130 | ||
131 | *pos++ = WLAN_EID_SUPPORTED_CHANNELS; | |
132 | ||
133 | /* | |
134 | * 5GHz and 2GHz channels numbers can overlap. Ignore this for now, as | |
135 | * this doesn't happen in real world scenarios. | |
136 | */ | |
137 | ||
138 | /* 2GHz, with 5MHz spacing */ | |
139 | subband_cnt = ieee80211_tdls_add_subband(sdata, skb, 2412, 2472, 5); | |
140 | ||
141 | /* 5GHz, with 20MHz spacing */ | |
142 | subband_cnt += ieee80211_tdls_add_subband(sdata, skb, 5000, 5825, 20); | |
143 | ||
144 | /* length */ | |
145 | *pos = 2 * subband_cnt; | |
146 | } | |
147 | ||
a38700dd AN |
148 | static void ieee80211_tdls_add_oper_classes(struct ieee80211_sub_if_data *sdata, |
149 | struct sk_buff *skb) | |
150 | { | |
151 | u8 *pos; | |
152 | u8 op_class; | |
153 | ||
154 | if (!ieee80211_chandef_to_operating_class(&sdata->vif.bss_conf.chandef, | |
155 | &op_class)) | |
156 | return; | |
157 | ||
158 | pos = skb_put(skb, 4); | |
159 | *pos++ = WLAN_EID_SUPPORTED_REGULATORY_CLASSES; | |
160 | *pos++ = 2; /* len */ | |
161 | ||
162 | *pos++ = op_class; | |
163 | *pos++ = op_class; /* give current operating class as alternate too */ | |
164 | } | |
165 | ||
2cedd879 AN |
166 | static void ieee80211_tdls_add_bss_coex_ie(struct sk_buff *skb) |
167 | { | |
168 | u8 *pos = (void *)skb_put(skb, 3); | |
169 | ||
170 | *pos++ = WLAN_EID_BSS_COEX_2040; | |
171 | *pos++ = 1; /* len */ | |
172 | ||
173 | *pos++ = WLAN_BSS_COEX_INFORMATION_REQUEST; | |
174 | } | |
175 | ||
dd8c0b03 AN |
176 | static u16 ieee80211_get_tdls_sta_capab(struct ieee80211_sub_if_data *sdata, |
177 | u16 status_code) | |
95224fe8 | 178 | { |
dd8c0b03 AN |
179 | /* The capability will be 0 when sending a failure code */ |
180 | if (status_code != 0) | |
181 | return 0; | |
182 | ||
ea1b2b45 JB |
183 | if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_2GHZ) { |
184 | return WLAN_CAPABILITY_SHORT_SLOT_TIME | | |
185 | WLAN_CAPABILITY_SHORT_PREAMBLE; | |
186 | } | |
95224fe8 | 187 | |
ea1b2b45 | 188 | return 0; |
95224fe8 AN |
189 | } |
190 | ||
1606ef4a AN |
191 | static void ieee80211_tdls_add_link_ie(struct ieee80211_sub_if_data *sdata, |
192 | struct sk_buff *skb, const u8 *peer, | |
193 | bool initiator) | |
95224fe8 AN |
194 | { |
195 | struct ieee80211_tdls_lnkie *lnkid; | |
1606ef4a AN |
196 | const u8 *init_addr, *rsp_addr; |
197 | ||
198 | if (initiator) { | |
199 | init_addr = sdata->vif.addr; | |
200 | rsp_addr = peer; | |
201 | } else { | |
202 | init_addr = peer; | |
203 | rsp_addr = sdata->vif.addr; | |
204 | } | |
95224fe8 AN |
205 | |
206 | lnkid = (void *)skb_put(skb, sizeof(struct ieee80211_tdls_lnkie)); | |
207 | ||
208 | lnkid->ie_type = WLAN_EID_LINK_ID; | |
209 | lnkid->ie_len = sizeof(struct ieee80211_tdls_lnkie) - 2; | |
210 | ||
1606ef4a AN |
211 | memcpy(lnkid->bssid, sdata->u.mgd.bssid, ETH_ALEN); |
212 | memcpy(lnkid->init_sta, init_addr, ETH_ALEN); | |
213 | memcpy(lnkid->resp_sta, rsp_addr, ETH_ALEN); | |
95224fe8 AN |
214 | } |
215 | ||
fb28ec0c AN |
216 | static void |
217 | ieee80211_tdls_add_aid(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb) | |
218 | { | |
219 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; | |
220 | u8 *pos = (void *)skb_put(skb, 4); | |
221 | ||
222 | *pos++ = WLAN_EID_AID; | |
223 | *pos++ = 2; /* len */ | |
224 | put_unaligned_le16(ifmgd->aid, pos); | |
225 | } | |
226 | ||
6f7eaa47 AN |
227 | /* translate numbering in the WMM parameter IE to the mac80211 notation */ |
228 | static enum ieee80211_ac_numbers ieee80211_ac_from_wmm(int ac) | |
229 | { | |
230 | switch (ac) { | |
231 | default: | |
232 | WARN_ON_ONCE(1); | |
233 | case 0: | |
234 | return IEEE80211_AC_BE; | |
235 | case 1: | |
236 | return IEEE80211_AC_BK; | |
237 | case 2: | |
238 | return IEEE80211_AC_VI; | |
239 | case 3: | |
240 | return IEEE80211_AC_VO; | |
241 | } | |
242 | } | |
243 | ||
244 | static u8 ieee80211_wmm_aci_aifsn(int aifsn, bool acm, int aci) | |
245 | { | |
246 | u8 ret; | |
247 | ||
248 | ret = aifsn & 0x0f; | |
249 | if (acm) | |
250 | ret |= 0x10; | |
251 | ret |= (aci << 5) & 0x60; | |
252 | return ret; | |
253 | } | |
254 | ||
255 | static u8 ieee80211_wmm_ecw(u16 cw_min, u16 cw_max) | |
256 | { | |
257 | return ((ilog2(cw_min + 1) << 0x0) & 0x0f) | | |
258 | ((ilog2(cw_max + 1) << 0x4) & 0xf0); | |
259 | } | |
260 | ||
261 | static void ieee80211_tdls_add_wmm_param_ie(struct ieee80211_sub_if_data *sdata, | |
262 | struct sk_buff *skb) | |
263 | { | |
264 | struct ieee80211_wmm_param_ie *wmm; | |
265 | struct ieee80211_tx_queue_params *txq; | |
266 | int i; | |
267 | ||
268 | wmm = (void *)skb_put(skb, sizeof(*wmm)); | |
269 | memset(wmm, 0, sizeof(*wmm)); | |
270 | ||
271 | wmm->element_id = WLAN_EID_VENDOR_SPECIFIC; | |
272 | wmm->len = sizeof(*wmm) - 2; | |
273 | ||
274 | wmm->oui[0] = 0x00; /* Microsoft OUI 00:50:F2 */ | |
275 | wmm->oui[1] = 0x50; | |
276 | wmm->oui[2] = 0xf2; | |
277 | wmm->oui_type = 2; /* WME */ | |
278 | wmm->oui_subtype = 1; /* WME param */ | |
279 | wmm->version = 1; /* WME ver */ | |
280 | wmm->qos_info = 0; /* U-APSD not in use */ | |
281 | ||
282 | /* | |
283 | * Use the EDCA parameters defined for the BSS, or default if the AP | |
284 | * doesn't support it, as mandated by 802.11-2012 section 10.22.4 | |
285 | */ | |
286 | for (i = 0; i < IEEE80211_NUM_ACS; i++) { | |
287 | txq = &sdata->tx_conf[ieee80211_ac_from_wmm(i)]; | |
288 | wmm->ac[i].aci_aifsn = ieee80211_wmm_aci_aifsn(txq->aifs, | |
289 | txq->acm, i); | |
290 | wmm->ac[i].cw = ieee80211_wmm_ecw(txq->cw_min, txq->cw_max); | |
291 | wmm->ac[i].txop_limit = cpu_to_le16(txq->txop); | |
292 | } | |
293 | } | |
294 | ||
0fabfaaf AN |
295 | static void |
296 | ieee80211_tdls_chandef_vht_upgrade(struct ieee80211_sub_if_data *sdata, | |
297 | struct sta_info *sta) | |
298 | { | |
299 | /* IEEE802.11ac-2013 Table E-4 */ | |
300 | u16 centers_80mhz[] = { 5210, 5290, 5530, 5610, 5690, 5775 }; | |
301 | struct cfg80211_chan_def uc = sta->tdls_chandef; | |
302 | enum nl80211_chan_width max_width = ieee80211_get_sta_bw(&sta->sta); | |
303 | int i; | |
304 | ||
305 | /* only support upgrading non-narrow channels up to 80Mhz */ | |
306 | if (max_width == NL80211_CHAN_WIDTH_5 || | |
307 | max_width == NL80211_CHAN_WIDTH_10) | |
308 | return; | |
309 | ||
310 | if (max_width > NL80211_CHAN_WIDTH_80) | |
311 | max_width = NL80211_CHAN_WIDTH_80; | |
312 | ||
313 | if (uc.width == max_width) | |
314 | return; | |
315 | /* | |
316 | * Channel usage constrains in the IEEE802.11ac-2013 specification only | |
317 | * allow expanding a 20MHz channel to 80MHz in a single way. In | |
318 | * addition, there are no 40MHz allowed channels that are not part of | |
319 | * the allowed 80MHz range in the 5GHz spectrum (the relevant one here). | |
320 | */ | |
321 | for (i = 0; i < ARRAY_SIZE(centers_80mhz); i++) | |
322 | if (abs(uc.chan->center_freq - centers_80mhz[i]) <= 30) { | |
323 | uc.center_freq1 = centers_80mhz[i]; | |
324 | uc.width = NL80211_CHAN_WIDTH_80; | |
325 | break; | |
326 | } | |
327 | ||
328 | if (!uc.center_freq1) | |
329 | return; | |
330 | ||
331 | /* proceed to downgrade the chandef until usable or the same */ | |
332 | while (uc.width > max_width && | |
333 | !cfg80211_reg_can_beacon(sdata->local->hw.wiphy, | |
334 | &uc, sdata->wdev.iftype)) | |
335 | ieee80211_chandef_downgrade(&uc); | |
336 | ||
337 | if (!cfg80211_chandef_identical(&uc, &sta->tdls_chandef)) { | |
338 | tdls_dbg(sdata, "TDLS ch width upgraded %d -> %d\n", | |
339 | sta->tdls_chandef.width, uc.width); | |
340 | ||
341 | /* | |
342 | * the station is not yet authorized when BW upgrade is done, | |
343 | * locking is not required | |
344 | */ | |
345 | sta->tdls_chandef = uc; | |
346 | } | |
347 | } | |
348 | ||
f09a87d2 AN |
349 | static void |
350 | ieee80211_tdls_add_setup_start_ies(struct ieee80211_sub_if_data *sdata, | |
351 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
352 | u8 action_code, bool initiator, |
353 | const u8 *extra_ies, size_t extra_ies_len) | |
f09a87d2 AN |
354 | { |
355 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); | |
40b861a0 | 356 | struct ieee80211_local *local = sdata->local; |
13cc8a4a AN |
357 | struct ieee80211_supported_band *sband; |
358 | struct ieee80211_sta_ht_cap ht_cap; | |
fb28ec0c | 359 | struct ieee80211_sta_vht_cap vht_cap; |
13cc8a4a | 360 | struct sta_info *sta = NULL; |
f09a87d2 AN |
361 | size_t offset = 0, noffset; |
362 | u8 *pos; | |
363 | ||
364 | ieee80211_add_srates_ie(sdata, skb, false, band); | |
365 | ieee80211_add_ext_srates_ie(sdata, skb, false, band); | |
f0d29cb9 | 366 | ieee80211_tdls_add_supp_channels(sdata, skb); |
f09a87d2 AN |
367 | |
368 | /* add any custom IEs that go before Extended Capabilities */ | |
369 | if (extra_ies_len) { | |
370 | static const u8 before_ext_cap[] = { | |
371 | WLAN_EID_SUPP_RATES, | |
372 | WLAN_EID_COUNTRY, | |
373 | WLAN_EID_EXT_SUPP_RATES, | |
374 | WLAN_EID_SUPPORTED_CHANNELS, | |
375 | WLAN_EID_RSN, | |
376 | }; | |
377 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
378 | before_ext_cap, | |
379 | ARRAY_SIZE(before_ext_cap), | |
380 | offset); | |
381 | pos = skb_put(skb, noffset - offset); | |
382 | memcpy(pos, extra_ies + offset, noffset - offset); | |
383 | offset = noffset; | |
384 | } | |
385 | ||
b98fb44f | 386 | ieee80211_tdls_add_ext_capab(sdata, skb); |
f09a87d2 | 387 | |
40b861a0 AN |
388 | /* add the QoS element if we support it */ |
389 | if (local->hw.queues >= IEEE80211_NUM_ACS && | |
390 | action_code != WLAN_PUB_ACTION_TDLS_DISCOVER_RES) | |
391 | ieee80211_add_wmm_info_ie(skb_put(skb, 9), 0); /* no U-APSD */ | |
392 | ||
f09a87d2 AN |
393 | /* add any custom IEs that go before HT capabilities */ |
394 | if (extra_ies_len) { | |
395 | static const u8 before_ht_cap[] = { | |
396 | WLAN_EID_SUPP_RATES, | |
397 | WLAN_EID_COUNTRY, | |
398 | WLAN_EID_EXT_SUPP_RATES, | |
399 | WLAN_EID_SUPPORTED_CHANNELS, | |
400 | WLAN_EID_RSN, | |
401 | WLAN_EID_EXT_CAPABILITY, | |
402 | WLAN_EID_QOS_CAPA, | |
403 | WLAN_EID_FAST_BSS_TRANSITION, | |
404 | WLAN_EID_TIMEOUT_INTERVAL, | |
405 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
406 | }; | |
407 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
408 | before_ht_cap, | |
409 | ARRAY_SIZE(before_ht_cap), | |
410 | offset); | |
411 | pos = skb_put(skb, noffset - offset); | |
412 | memcpy(pos, extra_ies + offset, noffset - offset); | |
413 | offset = noffset; | |
414 | } | |
415 | ||
0fabfaaf | 416 | mutex_lock(&local->sta_mtx); |
ae2e9fba AN |
417 | |
418 | /* we should have the peer STA if we're already responding */ | |
419 | if (action_code == WLAN_TDLS_SETUP_RESPONSE) { | |
420 | sta = sta_info_get(sdata, peer); | |
421 | if (WARN_ON_ONCE(!sta)) { | |
0fabfaaf | 422 | mutex_unlock(&local->sta_mtx); |
ae2e9fba AN |
423 | return; |
424 | } | |
0fabfaaf AN |
425 | |
426 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; | |
ae2e9fba AN |
427 | } |
428 | ||
a38700dd AN |
429 | ieee80211_tdls_add_oper_classes(sdata, skb); |
430 | ||
13cc8a4a AN |
431 | /* |
432 | * with TDLS we can switch channels, and HT-caps are not necessarily | |
433 | * the same on all bands. The specification limits the setup to a | |
434 | * single HT-cap, so use the current band for now. | |
435 | */ | |
436 | sband = local->hw.wiphy->bands[band]; | |
437 | memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); | |
c5309ba7 | 438 | |
070e176a AN |
439 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
440 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
441 | ht_cap.ht_supported) { | |
c5309ba7 JB |
442 | ieee80211_apply_htcap_overrides(sdata, &ht_cap); |
443 | ||
444 | /* disable SMPS in TDLS initiator */ | |
445 | ht_cap.cap |= WLAN_HT_CAP_SM_PS_DISABLED | |
446 | << IEEE80211_HT_CAP_SM_PS_SHIFT; | |
447 | ||
448 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
449 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
450 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
451 | ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
c5309ba7 JB |
452 | /* the peer caps are already intersected with our own */ |
453 | memcpy(&ht_cap, &sta->sta.ht_cap, sizeof(ht_cap)); | |
13cc8a4a AN |
454 | |
455 | pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); | |
456 | ieee80211_ie_build_ht_cap(pos, &ht_cap, ht_cap.cap); | |
457 | } | |
458 | ||
2cedd879 AN |
459 | if (ht_cap.ht_supported && |
460 | (ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40)) | |
461 | ieee80211_tdls_add_bss_coex_ie(skb); | |
462 | ||
fb28ec0c AN |
463 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
464 | ||
465 | /* add any custom IEs that go before VHT capabilities */ | |
466 | if (extra_ies_len) { | |
467 | static const u8 before_vht_cap[] = { | |
468 | WLAN_EID_SUPP_RATES, | |
469 | WLAN_EID_COUNTRY, | |
470 | WLAN_EID_EXT_SUPP_RATES, | |
471 | WLAN_EID_SUPPORTED_CHANNELS, | |
472 | WLAN_EID_RSN, | |
473 | WLAN_EID_EXT_CAPABILITY, | |
474 | WLAN_EID_QOS_CAPA, | |
475 | WLAN_EID_FAST_BSS_TRANSITION, | |
476 | WLAN_EID_TIMEOUT_INTERVAL, | |
477 | WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
478 | WLAN_EID_MULTI_BAND, | |
479 | }; | |
480 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
481 | before_vht_cap, | |
482 | ARRAY_SIZE(before_vht_cap), | |
483 | offset); | |
484 | pos = skb_put(skb, noffset - offset); | |
485 | memcpy(pos, extra_ies + offset, noffset - offset); | |
486 | offset = noffset; | |
487 | } | |
488 | ||
489 | /* build the VHT-cap similarly to the HT-cap */ | |
490 | memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); | |
070e176a AN |
491 | if ((action_code == WLAN_TDLS_SETUP_REQUEST || |
492 | action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) && | |
493 | vht_cap.vht_supported) { | |
fb28ec0c AN |
494 | ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); |
495 | ||
496 | /* the AID is present only when VHT is implemented */ | |
070e176a AN |
497 | if (action_code == WLAN_TDLS_SETUP_REQUEST) |
498 | ieee80211_tdls_add_aid(sdata, skb); | |
fb28ec0c AN |
499 | |
500 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
501 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
502 | } else if (action_code == WLAN_TDLS_SETUP_RESPONSE && | |
503 | vht_cap.vht_supported && sta->sta.vht_cap.vht_supported) { | |
504 | /* the peer caps are already intersected with our own */ | |
505 | memcpy(&vht_cap, &sta->sta.vht_cap, sizeof(vht_cap)); | |
506 | ||
507 | /* the AID is present only when VHT is implemented */ | |
508 | ieee80211_tdls_add_aid(sdata, skb); | |
509 | ||
510 | pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); | |
511 | ieee80211_ie_build_vht_cap(pos, &vht_cap, vht_cap.cap); | |
0fabfaaf AN |
512 | |
513 | /* | |
514 | * if both peers support WIDER_BW, we can expand the chandef to | |
515 | * a wider compatible one, up to 80MHz | |
516 | */ | |
517 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
518 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
fb28ec0c AN |
519 | } |
520 | ||
0fabfaaf | 521 | mutex_unlock(&local->sta_mtx); |
fb28ec0c | 522 | |
f09a87d2 AN |
523 | /* add any remaining IEs */ |
524 | if (extra_ies_len) { | |
525 | noffset = extra_ies_len; | |
526 | pos = skb_put(skb, noffset - offset); | |
527 | memcpy(pos, extra_ies + offset, noffset - offset); | |
528 | } | |
1606ef4a | 529 | |
f09a87d2 AN |
530 | } |
531 | ||
6f7eaa47 AN |
532 | static void |
533 | ieee80211_tdls_add_setup_cfm_ies(struct ieee80211_sub_if_data *sdata, | |
534 | struct sk_buff *skb, const u8 *peer, | |
535 | bool initiator, const u8 *extra_ies, | |
536 | size_t extra_ies_len) | |
537 | { | |
538 | struct ieee80211_local *local = sdata->local; | |
13cc8a4a | 539 | struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; |
6f7eaa47 | 540 | size_t offset = 0, noffset; |
13cc8a4a | 541 | struct sta_info *sta, *ap_sta; |
fb28ec0c | 542 | enum ieee80211_band band = ieee80211_get_sdata_band(sdata); |
6f7eaa47 AN |
543 | u8 *pos; |
544 | ||
0fabfaaf | 545 | mutex_lock(&local->sta_mtx); |
6f7eaa47 AN |
546 | |
547 | sta = sta_info_get(sdata, peer); | |
13cc8a4a AN |
548 | ap_sta = sta_info_get(sdata, ifmgd->bssid); |
549 | if (WARN_ON_ONCE(!sta || !ap_sta)) { | |
0fabfaaf | 550 | mutex_unlock(&local->sta_mtx); |
6f7eaa47 AN |
551 | return; |
552 | } | |
553 | ||
0fabfaaf AN |
554 | sta->tdls_chandef = sdata->vif.bss_conf.chandef; |
555 | ||
6f7eaa47 AN |
556 | /* add any custom IEs that go before the QoS IE */ |
557 | if (extra_ies_len) { | |
558 | static const u8 before_qos[] = { | |
559 | WLAN_EID_RSN, | |
560 | }; | |
561 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
562 | before_qos, | |
563 | ARRAY_SIZE(before_qos), | |
564 | offset); | |
565 | pos = skb_put(skb, noffset - offset); | |
566 | memcpy(pos, extra_ies + offset, noffset - offset); | |
567 | offset = noffset; | |
568 | } | |
569 | ||
570 | /* add the QoS param IE if both the peer and we support it */ | |
a74a8c84 | 571 | if (local->hw.queues >= IEEE80211_NUM_ACS && sta->sta.wme) |
6f7eaa47 AN |
572 | ieee80211_tdls_add_wmm_param_ie(sdata, skb); |
573 | ||
13cc8a4a AN |
574 | /* add any custom IEs that go before HT operation */ |
575 | if (extra_ies_len) { | |
576 | static const u8 before_ht_op[] = { | |
577 | WLAN_EID_RSN, | |
578 | WLAN_EID_QOS_CAPA, | |
579 | WLAN_EID_FAST_BSS_TRANSITION, | |
580 | WLAN_EID_TIMEOUT_INTERVAL, | |
581 | }; | |
582 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
583 | before_ht_op, | |
584 | ARRAY_SIZE(before_ht_op), | |
585 | offset); | |
586 | pos = skb_put(skb, noffset - offset); | |
587 | memcpy(pos, extra_ies + offset, noffset - offset); | |
588 | offset = noffset; | |
589 | } | |
590 | ||
591 | /* if HT support is only added in TDLS, we need an HT-operation IE */ | |
592 | if (!ap_sta->sta.ht_cap.ht_supported && sta->sta.ht_cap.ht_supported) { | |
890b7878 AN |
593 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_ht_operation)); |
594 | /* send an empty HT operation IE */ | |
595 | ieee80211_ie_build_ht_oper(pos, &sta->sta.ht_cap, | |
596 | &sdata->vif.bss_conf.chandef, 0); | |
13cc8a4a AN |
597 | } |
598 | ||
fb28ec0c AN |
599 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); |
600 | ||
601 | /* only include VHT-operation if not on the 2.4GHz band */ | |
890b7878 | 602 | if (band != IEEE80211_BAND_2GHZ && sta->sta.vht_cap.vht_supported) { |
0fabfaaf AN |
603 | /* |
604 | * if both peers support WIDER_BW, we can expand the chandef to | |
605 | * a wider compatible one, up to 80MHz | |
606 | */ | |
607 | if (test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW)) | |
608 | ieee80211_tdls_chandef_vht_upgrade(sdata, sta); | |
609 | ||
890b7878 AN |
610 | pos = skb_put(skb, 2 + sizeof(struct ieee80211_vht_operation)); |
611 | ieee80211_ie_build_vht_oper(pos, &sta->sta.vht_cap, | |
0fabfaaf | 612 | &sta->tdls_chandef); |
fb28ec0c AN |
613 | } |
614 | ||
0fabfaaf | 615 | mutex_unlock(&local->sta_mtx); |
13cc8a4a | 616 | |
6f7eaa47 AN |
617 | /* add any remaining IEs */ |
618 | if (extra_ies_len) { | |
619 | noffset = extra_ies_len; | |
620 | pos = skb_put(skb, noffset - offset); | |
621 | memcpy(pos, extra_ies + offset, noffset - offset); | |
622 | } | |
6f7eaa47 AN |
623 | } |
624 | ||
a7a6bdd0 AN |
625 | static void |
626 | ieee80211_tdls_add_chan_switch_req_ies(struct ieee80211_sub_if_data *sdata, | |
627 | struct sk_buff *skb, const u8 *peer, | |
628 | bool initiator, const u8 *extra_ies, | |
629 | size_t extra_ies_len, u8 oper_class, | |
630 | struct cfg80211_chan_def *chandef) | |
631 | { | |
632 | struct ieee80211_tdls_data *tf; | |
633 | size_t offset = 0, noffset; | |
634 | u8 *pos; | |
635 | ||
636 | if (WARN_ON_ONCE(!chandef)) | |
637 | return; | |
638 | ||
639 | tf = (void *)skb->data; | |
640 | tf->u.chan_switch_req.target_channel = | |
641 | ieee80211_frequency_to_channel(chandef->chan->center_freq); | |
642 | tf->u.chan_switch_req.oper_class = oper_class; | |
643 | ||
644 | if (extra_ies_len) { | |
645 | static const u8 before_lnkie[] = { | |
646 | WLAN_EID_SECONDARY_CHANNEL_OFFSET, | |
647 | }; | |
648 | noffset = ieee80211_ie_split(extra_ies, extra_ies_len, | |
649 | before_lnkie, | |
650 | ARRAY_SIZE(before_lnkie), | |
651 | offset); | |
652 | pos = skb_put(skb, noffset - offset); | |
653 | memcpy(pos, extra_ies + offset, noffset - offset); | |
654 | offset = noffset; | |
655 | } | |
656 | ||
657 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
658 | ||
659 | /* add any remaining IEs */ | |
660 | if (extra_ies_len) { | |
661 | noffset = extra_ies_len; | |
662 | pos = skb_put(skb, noffset - offset); | |
663 | memcpy(pos, extra_ies + offset, noffset - offset); | |
664 | } | |
665 | } | |
666 | ||
8a4d32f3 AN |
667 | static void |
668 | ieee80211_tdls_add_chan_switch_resp_ies(struct ieee80211_sub_if_data *sdata, | |
669 | struct sk_buff *skb, const u8 *peer, | |
670 | u16 status_code, bool initiator, | |
671 | const u8 *extra_ies, | |
672 | size_t extra_ies_len) | |
673 | { | |
674 | if (status_code == 0) | |
675 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
676 | ||
677 | if (extra_ies_len) | |
678 | memcpy(skb_put(skb, extra_ies_len), extra_ies, extra_ies_len); | |
679 | } | |
680 | ||
46792a2d AN |
681 | static void ieee80211_tdls_add_ies(struct ieee80211_sub_if_data *sdata, |
682 | struct sk_buff *skb, const u8 *peer, | |
1606ef4a AN |
683 | u8 action_code, u16 status_code, |
684 | bool initiator, const u8 *extra_ies, | |
c2733905 AN |
685 | size_t extra_ies_len, u8 oper_class, |
686 | struct cfg80211_chan_def *chandef) | |
46792a2d | 687 | { |
46792a2d AN |
688 | switch (action_code) { |
689 | case WLAN_TDLS_SETUP_REQUEST: | |
690 | case WLAN_TDLS_SETUP_RESPONSE: | |
691 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
1606ef4a AN |
692 | if (status_code == 0) |
693 | ieee80211_tdls_add_setup_start_ies(sdata, skb, peer, | |
694 | action_code, | |
695 | initiator, | |
696 | extra_ies, | |
697 | extra_ies_len); | |
46792a2d AN |
698 | break; |
699 | case WLAN_TDLS_SETUP_CONFIRM: | |
6f7eaa47 AN |
700 | if (status_code == 0) |
701 | ieee80211_tdls_add_setup_cfm_ies(sdata, skb, peer, | |
702 | initiator, extra_ies, | |
703 | extra_ies_len); | |
704 | break; | |
46792a2d AN |
705 | case WLAN_TDLS_TEARDOWN: |
706 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
f09a87d2 AN |
707 | if (extra_ies_len) |
708 | memcpy(skb_put(skb, extra_ies_len), extra_ies, | |
709 | extra_ies_len); | |
1606ef4a AN |
710 | if (status_code == 0 || action_code == WLAN_TDLS_TEARDOWN) |
711 | ieee80211_tdls_add_link_ie(sdata, skb, peer, initiator); | |
46792a2d | 712 | break; |
a7a6bdd0 AN |
713 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
714 | ieee80211_tdls_add_chan_switch_req_ies(sdata, skb, peer, | |
715 | initiator, extra_ies, | |
716 | extra_ies_len, | |
717 | oper_class, chandef); | |
718 | break; | |
8a4d32f3 AN |
719 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
720 | ieee80211_tdls_add_chan_switch_resp_ies(sdata, skb, peer, | |
721 | status_code, | |
722 | initiator, extra_ies, | |
723 | extra_ies_len); | |
724 | break; | |
46792a2d AN |
725 | } |
726 | ||
46792a2d AN |
727 | } |
728 | ||
95224fe8 AN |
729 | static int |
730 | ieee80211_prep_tdls_encap_data(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 731 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
732 | u16 status_code, struct sk_buff *skb) |
733 | { | |
734 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
735 | struct ieee80211_tdls_data *tf; |
736 | ||
737 | tf = (void *)skb_put(skb, offsetof(struct ieee80211_tdls_data, u)); | |
738 | ||
739 | memcpy(tf->da, peer, ETH_ALEN); | |
740 | memcpy(tf->sa, sdata->vif.addr, ETH_ALEN); | |
741 | tf->ether_type = cpu_to_be16(ETH_P_TDLS); | |
742 | tf->payload_type = WLAN_TDLS_SNAP_RFTYPE; | |
743 | ||
59cd85cb AN |
744 | /* network header is after the ethernet header */ |
745 | skb_set_network_header(skb, ETH_HLEN); | |
746 | ||
95224fe8 AN |
747 | switch (action_code) { |
748 | case WLAN_TDLS_SETUP_REQUEST: | |
749 | tf->category = WLAN_CATEGORY_TDLS; | |
750 | tf->action_code = WLAN_TDLS_SETUP_REQUEST; | |
751 | ||
752 | skb_put(skb, sizeof(tf->u.setup_req)); | |
753 | tf->u.setup_req.dialog_token = dialog_token; | |
754 | tf->u.setup_req.capability = | |
dd8c0b03 AN |
755 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
756 | status_code)); | |
95224fe8 AN |
757 | break; |
758 | case WLAN_TDLS_SETUP_RESPONSE: | |
759 | tf->category = WLAN_CATEGORY_TDLS; | |
760 | tf->action_code = WLAN_TDLS_SETUP_RESPONSE; | |
761 | ||
762 | skb_put(skb, sizeof(tf->u.setup_resp)); | |
763 | tf->u.setup_resp.status_code = cpu_to_le16(status_code); | |
764 | tf->u.setup_resp.dialog_token = dialog_token; | |
765 | tf->u.setup_resp.capability = | |
dd8c0b03 AN |
766 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
767 | status_code)); | |
95224fe8 AN |
768 | break; |
769 | case WLAN_TDLS_SETUP_CONFIRM: | |
770 | tf->category = WLAN_CATEGORY_TDLS; | |
771 | tf->action_code = WLAN_TDLS_SETUP_CONFIRM; | |
772 | ||
773 | skb_put(skb, sizeof(tf->u.setup_cfm)); | |
774 | tf->u.setup_cfm.status_code = cpu_to_le16(status_code); | |
775 | tf->u.setup_cfm.dialog_token = dialog_token; | |
776 | break; | |
777 | case WLAN_TDLS_TEARDOWN: | |
778 | tf->category = WLAN_CATEGORY_TDLS; | |
779 | tf->action_code = WLAN_TDLS_TEARDOWN; | |
780 | ||
781 | skb_put(skb, sizeof(tf->u.teardown)); | |
782 | tf->u.teardown.reason_code = cpu_to_le16(status_code); | |
783 | break; | |
784 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
785 | tf->category = WLAN_CATEGORY_TDLS; | |
786 | tf->action_code = WLAN_TDLS_DISCOVERY_REQUEST; | |
787 | ||
788 | skb_put(skb, sizeof(tf->u.discover_req)); | |
789 | tf->u.discover_req.dialog_token = dialog_token; | |
790 | break; | |
a7a6bdd0 AN |
791 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
792 | tf->category = WLAN_CATEGORY_TDLS; | |
793 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
794 | ||
795 | skb_put(skb, sizeof(tf->u.chan_switch_req)); | |
796 | break; | |
8a4d32f3 AN |
797 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
798 | tf->category = WLAN_CATEGORY_TDLS; | |
799 | tf->action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
800 | ||
801 | skb_put(skb, sizeof(tf->u.chan_switch_resp)); | |
802 | tf->u.chan_switch_resp.status_code = cpu_to_le16(status_code); | |
803 | break; | |
95224fe8 AN |
804 | default: |
805 | return -EINVAL; | |
806 | } | |
807 | ||
808 | return 0; | |
809 | } | |
810 | ||
811 | static int | |
812 | ieee80211_prep_tdls_direct(struct wiphy *wiphy, struct net_device *dev, | |
3b3a0162 | 813 | const u8 *peer, u8 action_code, u8 dialog_token, |
95224fe8 AN |
814 | u16 status_code, struct sk_buff *skb) |
815 | { | |
816 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
95224fe8 AN |
817 | struct ieee80211_mgmt *mgmt; |
818 | ||
819 | mgmt = (void *)skb_put(skb, 24); | |
820 | memset(mgmt, 0, 24); | |
821 | memcpy(mgmt->da, peer, ETH_ALEN); | |
822 | memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); | |
823 | memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN); | |
824 | ||
825 | mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | | |
826 | IEEE80211_STYPE_ACTION); | |
827 | ||
828 | switch (action_code) { | |
829 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
830 | skb_put(skb, 1 + sizeof(mgmt->u.action.u.tdls_discover_resp)); | |
831 | mgmt->u.action.category = WLAN_CATEGORY_PUBLIC; | |
832 | mgmt->u.action.u.tdls_discover_resp.action_code = | |
833 | WLAN_PUB_ACTION_TDLS_DISCOVER_RES; | |
834 | mgmt->u.action.u.tdls_discover_resp.dialog_token = | |
835 | dialog_token; | |
836 | mgmt->u.action.u.tdls_discover_resp.capability = | |
dd8c0b03 AN |
837 | cpu_to_le16(ieee80211_get_tdls_sta_capab(sdata, |
838 | status_code)); | |
95224fe8 AN |
839 | break; |
840 | default: | |
841 | return -EINVAL; | |
842 | } | |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
c2733905 AN |
847 | static struct sk_buff * |
848 | ieee80211_tdls_build_mgmt_packet_data(struct ieee80211_sub_if_data *sdata, | |
849 | const u8 *peer, u8 action_code, | |
850 | u8 dialog_token, u16 status_code, | |
851 | bool initiator, const u8 *extra_ies, | |
852 | size_t extra_ies_len, u8 oper_class, | |
853 | struct cfg80211_chan_def *chandef) | |
95224fe8 | 854 | { |
95224fe8 | 855 | struct ieee80211_local *local = sdata->local; |
c2733905 | 856 | struct sk_buff *skb; |
95224fe8 AN |
857 | int ret; |
858 | ||
c2733905 | 859 | skb = netdev_alloc_skb(sdata->dev, |
1277b4a9 LK |
860 | local->hw.extra_tx_headroom + |
861 | max(sizeof(struct ieee80211_mgmt), | |
862 | sizeof(struct ieee80211_tdls_data)) + | |
863 | 50 + /* supported rates */ | |
b98fb44f | 864 | 10 + /* ext capab */ |
1277b4a9 LK |
865 | 26 + /* max(WMM-info, WMM-param) */ |
866 | 2 + max(sizeof(struct ieee80211_ht_cap), | |
867 | sizeof(struct ieee80211_ht_operation)) + | |
fb28ec0c AN |
868 | 2 + max(sizeof(struct ieee80211_vht_cap), |
869 | sizeof(struct ieee80211_vht_operation)) + | |
f0d29cb9 | 870 | 50 + /* supported channels */ |
2cedd879 | 871 | 3 + /* 40/20 BSS coex */ |
fb28ec0c | 872 | 4 + /* AID */ |
a38700dd | 873 | 4 + /* oper classes */ |
1277b4a9 LK |
874 | extra_ies_len + |
875 | sizeof(struct ieee80211_tdls_lnkie)); | |
95224fe8 | 876 | if (!skb) |
c2733905 | 877 | return NULL; |
95224fe8 AN |
878 | |
879 | skb_reserve(skb, local->hw.extra_tx_headroom); | |
880 | ||
881 | switch (action_code) { | |
882 | case WLAN_TDLS_SETUP_REQUEST: | |
883 | case WLAN_TDLS_SETUP_RESPONSE: | |
884 | case WLAN_TDLS_SETUP_CONFIRM: | |
885 | case WLAN_TDLS_TEARDOWN: | |
886 | case WLAN_TDLS_DISCOVERY_REQUEST: | |
a7a6bdd0 | 887 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 888 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
c2733905 AN |
889 | ret = ieee80211_prep_tdls_encap_data(local->hw.wiphy, |
890 | sdata->dev, peer, | |
95224fe8 AN |
891 | action_code, dialog_token, |
892 | status_code, skb); | |
95224fe8 AN |
893 | break; |
894 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: | |
c2733905 AN |
895 | ret = ieee80211_prep_tdls_direct(local->hw.wiphy, sdata->dev, |
896 | peer, action_code, | |
95224fe8 AN |
897 | dialog_token, status_code, |
898 | skb); | |
95224fe8 AN |
899 | break; |
900 | default: | |
901 | ret = -ENOTSUPP; | |
902 | break; | |
903 | } | |
904 | ||
905 | if (ret < 0) | |
906 | goto fail; | |
907 | ||
c2733905 AN |
908 | ieee80211_tdls_add_ies(sdata, skb, peer, action_code, status_code, |
909 | initiator, extra_ies, extra_ies_len, oper_class, | |
910 | chandef); | |
911 | return skb; | |
912 | ||
913 | fail: | |
914 | dev_kfree_skb(skb); | |
915 | return NULL; | |
916 | } | |
917 | ||
918 | static int | |
919 | ieee80211_tdls_prep_mgmt_packet(struct wiphy *wiphy, struct net_device *dev, | |
920 | const u8 *peer, u8 action_code, u8 dialog_token, | |
921 | u16 status_code, u32 peer_capability, | |
922 | bool initiator, const u8 *extra_ies, | |
923 | size_t extra_ies_len, u8 oper_class, | |
924 | struct cfg80211_chan_def *chandef) | |
925 | { | |
926 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
927 | struct sk_buff *skb = NULL; | |
928 | struct sta_info *sta; | |
929 | u32 flags = 0; | |
930 | int ret = 0; | |
931 | ||
626911cc AN |
932 | rcu_read_lock(); |
933 | sta = sta_info_get(sdata, peer); | |
934 | ||
935 | /* infer the initiator if we can, to support old userspace */ | |
95224fe8 AN |
936 | switch (action_code) { |
937 | case WLAN_TDLS_SETUP_REQUEST: | |
8b94148c | 938 | if (sta) { |
626911cc | 939 | set_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
940 | sta->sta.tdls_initiator = false; |
941 | } | |
626911cc | 942 | /* fall-through */ |
95224fe8 | 943 | case WLAN_TDLS_SETUP_CONFIRM: |
95224fe8 | 944 | case WLAN_TDLS_DISCOVERY_REQUEST: |
626911cc | 945 | initiator = true; |
95224fe8 AN |
946 | break; |
947 | case WLAN_TDLS_SETUP_RESPONSE: | |
626911cc AN |
948 | /* |
949 | * In some testing scenarios, we send a request and response. | |
950 | * Make the last packet sent take effect for the initiator | |
951 | * value. | |
952 | */ | |
8b94148c | 953 | if (sta) { |
626911cc | 954 | clear_sta_flag(sta, WLAN_STA_TDLS_INITIATOR); |
8b94148c AN |
955 | sta->sta.tdls_initiator = true; |
956 | } | |
626911cc | 957 | /* fall-through */ |
95224fe8 | 958 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
626911cc | 959 | initiator = false; |
2fb6b9b8 AN |
960 | break; |
961 | case WLAN_TDLS_TEARDOWN: | |
a7a6bdd0 | 962 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: |
8a4d32f3 | 963 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: |
2fb6b9b8 | 964 | /* any value is ok */ |
95224fe8 AN |
965 | break; |
966 | default: | |
967 | ret = -ENOTSUPP; | |
626911cc | 968 | break; |
95224fe8 AN |
969 | } |
970 | ||
46792a2d AN |
971 | if (sta && test_sta_flag(sta, WLAN_STA_TDLS_INITIATOR)) |
972 | initiator = true; | |
2fb6b9b8 | 973 | |
626911cc AN |
974 | rcu_read_unlock(); |
975 | if (ret < 0) | |
976 | goto fail; | |
977 | ||
c2733905 AN |
978 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, peer, action_code, |
979 | dialog_token, status_code, | |
980 | initiator, extra_ies, | |
981 | extra_ies_len, oper_class, | |
982 | chandef); | |
983 | if (!skb) { | |
984 | ret = -EINVAL; | |
985 | goto fail; | |
986 | } | |
987 | ||
988 | if (action_code == WLAN_PUB_ACTION_TDLS_DISCOVER_RES) { | |
95224fe8 AN |
989 | ieee80211_tx_skb(sdata, skb); |
990 | return 0; | |
991 | } | |
992 | ||
993 | /* | |
994 | * According to 802.11z: Setup req/resp are sent in AC_BK, otherwise | |
995 | * we should default to AC_VI. | |
996 | */ | |
997 | switch (action_code) { | |
998 | case WLAN_TDLS_SETUP_REQUEST: | |
999 | case WLAN_TDLS_SETUP_RESPONSE: | |
1000 | skb_set_queue_mapping(skb, IEEE80211_AC_BK); | |
1001 | skb->priority = 2; | |
1002 | break; | |
1003 | default: | |
1004 | skb_set_queue_mapping(skb, IEEE80211_AC_VI); | |
1005 | skb->priority = 5; | |
1006 | break; | |
1007 | } | |
1008 | ||
1277b4a9 LK |
1009 | /* |
1010 | * Set the WLAN_TDLS_TEARDOWN flag to indicate a teardown in progress. | |
1011 | * Later, if no ACK is returned from peer, we will re-send the teardown | |
1012 | * packet through the AP. | |
1013 | */ | |
1014 | if ((action_code == WLAN_TDLS_TEARDOWN) && | |
30686bf7 | 1015 | ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { |
1277b4a9 LK |
1016 | bool try_resend; /* Should we keep skb for possible resend */ |
1017 | ||
1018 | /* If not sending directly to peer - no point in keeping skb */ | |
1019 | rcu_read_lock(); | |
1020 | sta = sta_info_get(sdata, peer); | |
1021 | try_resend = sta && test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1022 | rcu_read_unlock(); | |
1023 | ||
1024 | spin_lock_bh(&sdata->u.mgd.teardown_lock); | |
1025 | if (try_resend && !sdata->u.mgd.teardown_skb) { | |
1026 | /* Mark it as requiring TX status callback */ | |
1027 | flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | | |
1028 | IEEE80211_TX_INTFL_MLME_CONN_TX; | |
1029 | ||
1030 | /* | |
1031 | * skb is copied since mac80211 will later set | |
1032 | * properties that might not be the same as the AP, | |
1033 | * such as encryption, QoS, addresses, etc. | |
1034 | * | |
1035 | * No problem if skb_copy() fails, so no need to check. | |
1036 | */ | |
1037 | sdata->u.mgd.teardown_skb = skb_copy(skb, GFP_ATOMIC); | |
1038 | sdata->u.mgd.orig_teardown_skb = skb; | |
1039 | } | |
1040 | spin_unlock_bh(&sdata->u.mgd.teardown_lock); | |
1041 | } | |
1042 | ||
95224fe8 AN |
1043 | /* disable bottom halves when entering the Tx path */ |
1044 | local_bh_disable(); | |
1277b4a9 | 1045 | __ieee80211_subif_start_xmit(skb, dev, flags); |
95224fe8 AN |
1046 | local_bh_enable(); |
1047 | ||
1048 | return ret; | |
1049 | ||
1050 | fail: | |
1051 | dev_kfree_skb(skb); | |
1052 | return ret; | |
1053 | } | |
1054 | ||
191dd469 AN |
1055 | static int |
1056 | ieee80211_tdls_mgmt_setup(struct wiphy *wiphy, struct net_device *dev, | |
1057 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1058 | u16 status_code, u32 peer_capability, bool initiator, | |
1059 | const u8 *extra_ies, size_t extra_ies_len) | |
17e6a59a AN |
1060 | { |
1061 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1062 | struct ieee80211_local *local = sdata->local; | |
d51c2ea3 | 1063 | enum ieee80211_smps_mode smps_mode = sdata->u.mgd.driver_smps_mode; |
17e6a59a AN |
1064 | int ret; |
1065 | ||
d51c2ea3 AN |
1066 | /* don't support setup with forced SMPS mode that's not off */ |
1067 | if (smps_mode != IEEE80211_SMPS_AUTOMATIC && | |
1068 | smps_mode != IEEE80211_SMPS_OFF) { | |
1069 | tdls_dbg(sdata, "Aborting TDLS setup due to SMPS mode %d\n", | |
1070 | smps_mode); | |
1071 | return -ENOTSUPP; | |
1072 | } | |
1073 | ||
17e6a59a AN |
1074 | mutex_lock(&local->mtx); |
1075 | ||
1076 | /* we don't support concurrent TDLS peer setups */ | |
81dd2b88 AN |
1077 | if (!is_zero_ether_addr(sdata->u.mgd.tdls_peer) && |
1078 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { | |
17e6a59a | 1079 | ret = -EBUSY; |
ae2e9fba | 1080 | goto out_unlock; |
17e6a59a AN |
1081 | } |
1082 | ||
7adc3e46 AN |
1083 | /* |
1084 | * make sure we have a STA representing the peer so we drop or buffer | |
1085 | * non-TDLS-setup frames to the peer. We can't send other packets | |
6ae32e5d AN |
1086 | * during setup through the AP path. |
1087 | * Allow error packets to be sent - sometimes we don't even add a STA | |
1088 | * before failing the setup. | |
7adc3e46 | 1089 | */ |
6ae32e5d AN |
1090 | if (status_code == 0) { |
1091 | rcu_read_lock(); | |
1092 | if (!sta_info_get(sdata, peer)) { | |
1093 | rcu_read_unlock(); | |
1094 | ret = -ENOLINK; | |
ae2e9fba | 1095 | goto out_unlock; |
6ae32e5d | 1096 | } |
7adc3e46 | 1097 | rcu_read_unlock(); |
7adc3e46 | 1098 | } |
7adc3e46 | 1099 | |
3b24f4c6 | 1100 | ieee80211_flush_queues(local, sdata, false); |
ae2e9fba AN |
1101 | memcpy(sdata->u.mgd.tdls_peer, peer, ETH_ALEN); |
1102 | mutex_unlock(&local->mtx); | |
db67d661 | 1103 | |
ae2e9fba | 1104 | /* we cannot take the mutex while preparing the setup packet */ |
17e6a59a AN |
1105 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, |
1106 | dialog_token, status_code, | |
2fb6b9b8 | 1107 | peer_capability, initiator, |
c2733905 AN |
1108 | extra_ies, extra_ies_len, 0, |
1109 | NULL); | |
ae2e9fba AN |
1110 | if (ret < 0) { |
1111 | mutex_lock(&local->mtx); | |
1112 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
1113 | mutex_unlock(&local->mtx); | |
1114 | return ret; | |
1115 | } | |
17e6a59a | 1116 | |
191dd469 | 1117 | ieee80211_queue_delayed_work(&sdata->local->hw, |
81dd2b88 | 1118 | &sdata->u.mgd.tdls_peer_del_work, |
191dd469 | 1119 | TDLS_PEER_SETUP_TIMEOUT); |
ae2e9fba | 1120 | return 0; |
17e6a59a | 1121 | |
ae2e9fba | 1122 | out_unlock: |
17e6a59a | 1123 | mutex_unlock(&local->mtx); |
191dd469 AN |
1124 | return ret; |
1125 | } | |
1126 | ||
db67d661 AN |
1127 | static int |
1128 | ieee80211_tdls_mgmt_teardown(struct wiphy *wiphy, struct net_device *dev, | |
1129 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1130 | u16 status_code, u32 peer_capability, | |
1131 | bool initiator, const u8 *extra_ies, | |
1132 | size_t extra_ies_len) | |
1133 | { | |
1134 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1135 | struct ieee80211_local *local = sdata->local; | |
1136 | struct sta_info *sta; | |
1137 | int ret; | |
1138 | ||
1139 | /* | |
1140 | * No packets can be transmitted to the peer via the AP during setup - | |
1141 | * the STA is set as a TDLS peer, but is not authorized. | |
1142 | * During teardown, we prevent direct transmissions by stopping the | |
1143 | * queues and flushing all direct packets. | |
1144 | */ | |
1145 | ieee80211_stop_vif_queues(local, sdata, | |
1146 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
3b24f4c6 | 1147 | ieee80211_flush_queues(local, sdata, false); |
db67d661 AN |
1148 | |
1149 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, action_code, | |
1150 | dialog_token, status_code, | |
1151 | peer_capability, initiator, | |
c2733905 AN |
1152 | extra_ies, extra_ies_len, 0, |
1153 | NULL); | |
db67d661 AN |
1154 | if (ret < 0) |
1155 | sdata_err(sdata, "Failed sending TDLS teardown packet %d\n", | |
1156 | ret); | |
1157 | ||
1158 | /* | |
1159 | * Remove the STA AUTH flag to force further traffic through the AP. If | |
1160 | * the STA was unreachable, it was already removed. | |
1161 | */ | |
1162 | rcu_read_lock(); | |
1163 | sta = sta_info_get(sdata, peer); | |
1164 | if (sta) | |
1165 | clear_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1166 | rcu_read_unlock(); | |
1167 | ||
1168 | ieee80211_wake_vif_queues(local, sdata, | |
1169 | IEEE80211_QUEUE_STOP_REASON_TDLS_TEARDOWN); | |
1170 | ||
1171 | return 0; | |
1172 | } | |
1173 | ||
191dd469 AN |
1174 | int ieee80211_tdls_mgmt(struct wiphy *wiphy, struct net_device *dev, |
1175 | const u8 *peer, u8 action_code, u8 dialog_token, | |
1176 | u16 status_code, u32 peer_capability, | |
1177 | bool initiator, const u8 *extra_ies, | |
1178 | size_t extra_ies_len) | |
1179 | { | |
1180 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1181 | int ret; | |
1182 | ||
1183 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1184 | return -ENOTSUPP; | |
1185 | ||
1186 | /* make sure we are in managed mode, and associated */ | |
1187 | if (sdata->vif.type != NL80211_IFTYPE_STATION || | |
1188 | !sdata->u.mgd.associated) | |
1189 | return -EINVAL; | |
1190 | ||
1191 | switch (action_code) { | |
1192 | case WLAN_TDLS_SETUP_REQUEST: | |
1193 | case WLAN_TDLS_SETUP_RESPONSE: | |
1194 | ret = ieee80211_tdls_mgmt_setup(wiphy, dev, peer, action_code, | |
1195 | dialog_token, status_code, | |
1196 | peer_capability, initiator, | |
1197 | extra_ies, extra_ies_len); | |
1198 | break; | |
1199 | case WLAN_TDLS_TEARDOWN: | |
db67d661 AN |
1200 | ret = ieee80211_tdls_mgmt_teardown(wiphy, dev, peer, |
1201 | action_code, dialog_token, | |
1202 | status_code, | |
1203 | peer_capability, initiator, | |
1204 | extra_ies, extra_ies_len); | |
1205 | break; | |
191dd469 | 1206 | case WLAN_TDLS_DISCOVERY_REQUEST: |
ee10f2c7 AN |
1207 | /* |
1208 | * Protect the discovery so we can hear the TDLS discovery | |
1209 | * response frame. It is transmitted directly and not buffered | |
1210 | * by the AP. | |
1211 | */ | |
1212 | drv_mgd_protect_tdls_discover(sdata->local, sdata); | |
1213 | /* fall-through */ | |
1214 | case WLAN_TDLS_SETUP_CONFIRM: | |
191dd469 AN |
1215 | case WLAN_PUB_ACTION_TDLS_DISCOVER_RES: |
1216 | /* no special handling */ | |
1217 | ret = ieee80211_tdls_prep_mgmt_packet(wiphy, dev, peer, | |
1218 | action_code, | |
1219 | dialog_token, | |
1220 | status_code, | |
1221 | peer_capability, | |
1222 | initiator, extra_ies, | |
c2733905 | 1223 | extra_ies_len, 0, NULL); |
191dd469 AN |
1224 | break; |
1225 | default: | |
1226 | ret = -EOPNOTSUPP; | |
1227 | break; | |
1228 | } | |
17e6a59a AN |
1229 | |
1230 | tdls_dbg(sdata, "TDLS mgmt action %d peer %pM status %d\n", | |
1231 | action_code, peer, ret); | |
1232 | return ret; | |
1233 | } | |
1234 | ||
0fabfaaf AN |
1235 | static void iee80211_tdls_recalc_chanctx(struct ieee80211_sub_if_data *sdata) |
1236 | { | |
1237 | struct ieee80211_local *local = sdata->local; | |
1238 | struct ieee80211_chanctx_conf *conf; | |
1239 | struct ieee80211_chanctx *ctx; | |
1240 | ||
1241 | mutex_lock(&local->chanctx_mtx); | |
1242 | conf = rcu_dereference_protected(sdata->vif.chanctx_conf, | |
1243 | lockdep_is_held(&local->chanctx_mtx)); | |
1244 | if (conf) { | |
1245 | ctx = container_of(conf, struct ieee80211_chanctx, conf); | |
1246 | ieee80211_recalc_chanctx_chantype(local, ctx); | |
1247 | } | |
1248 | mutex_unlock(&local->chanctx_mtx); | |
1249 | } | |
1250 | ||
95224fe8 | 1251 | int ieee80211_tdls_oper(struct wiphy *wiphy, struct net_device *dev, |
3b3a0162 | 1252 | const u8 *peer, enum nl80211_tdls_operation oper) |
95224fe8 AN |
1253 | { |
1254 | struct sta_info *sta; | |
1255 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
17e6a59a AN |
1256 | struct ieee80211_local *local = sdata->local; |
1257 | int ret; | |
95224fe8 AN |
1258 | |
1259 | if (!(wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS)) | |
1260 | return -ENOTSUPP; | |
1261 | ||
1262 | if (sdata->vif.type != NL80211_IFTYPE_STATION) | |
1263 | return -EINVAL; | |
1264 | ||
17e6a59a AN |
1265 | switch (oper) { |
1266 | case NL80211_TDLS_ENABLE_LINK: | |
1267 | case NL80211_TDLS_DISABLE_LINK: | |
1268 | break; | |
1269 | case NL80211_TDLS_TEARDOWN: | |
1270 | case NL80211_TDLS_SETUP: | |
1271 | case NL80211_TDLS_DISCOVERY_REQ: | |
1272 | /* We don't support in-driver setup/teardown/discovery */ | |
1273 | return -ENOTSUPP; | |
1274 | } | |
1275 | ||
1276 | mutex_lock(&local->mtx); | |
95224fe8 AN |
1277 | tdls_dbg(sdata, "TDLS oper %d peer %pM\n", oper, peer); |
1278 | ||
1279 | switch (oper) { | |
1280 | case NL80211_TDLS_ENABLE_LINK: | |
c5a71688 AN |
1281 | if (sdata->vif.csa_active) { |
1282 | tdls_dbg(sdata, "TDLS: disallow link during CSA\n"); | |
1283 | ret = -EBUSY; | |
1284 | break; | |
1285 | } | |
1286 | ||
0fabfaaf AN |
1287 | iee80211_tdls_recalc_chanctx(sdata); |
1288 | ||
95224fe8 AN |
1289 | rcu_read_lock(); |
1290 | sta = sta_info_get(sdata, peer); | |
1291 | if (!sta) { | |
1292 | rcu_read_unlock(); | |
17e6a59a AN |
1293 | ret = -ENOLINK; |
1294 | break; | |
95224fe8 AN |
1295 | } |
1296 | ||
1297 | set_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH); | |
1298 | rcu_read_unlock(); | |
17e6a59a | 1299 | |
81dd2b88 AN |
1300 | WARN_ON_ONCE(is_zero_ether_addr(sdata->u.mgd.tdls_peer) || |
1301 | !ether_addr_equal(sdata->u.mgd.tdls_peer, peer)); | |
17e6a59a | 1302 | ret = 0; |
95224fe8 AN |
1303 | break; |
1304 | case NL80211_TDLS_DISABLE_LINK: | |
bb3f8486 LK |
1305 | /* |
1306 | * The teardown message in ieee80211_tdls_mgmt_teardown() was | |
1307 | * created while the queues were stopped, so it might still be | |
1308 | * pending. Before flushing the queues we need to be sure the | |
1309 | * message is handled by the tasklet handling pending messages, | |
1310 | * otherwise we might start destroying the station before | |
1311 | * sending the teardown packet. | |
1312 | * Note that this only forces the tasklet to flush pendings - | |
1313 | * not to stop the tasklet from rescheduling itself. | |
1314 | */ | |
1315 | tasklet_kill(&local->tx_pending_tasklet); | |
db67d661 | 1316 | /* flush a potentially queued teardown packet */ |
3b24f4c6 | 1317 | ieee80211_flush_queues(local, sdata, false); |
db67d661 | 1318 | |
17e6a59a | 1319 | ret = sta_info_destroy_addr(sdata, peer); |
0fabfaaf | 1320 | iee80211_tdls_recalc_chanctx(sdata); |
17e6a59a | 1321 | break; |
95224fe8 | 1322 | default: |
17e6a59a AN |
1323 | ret = -ENOTSUPP; |
1324 | break; | |
95224fe8 AN |
1325 | } |
1326 | ||
81dd2b88 AN |
1327 | if (ret == 0 && ether_addr_equal(sdata->u.mgd.tdls_peer, peer)) { |
1328 | cancel_delayed_work(&sdata->u.mgd.tdls_peer_del_work); | |
1329 | eth_zero_addr(sdata->u.mgd.tdls_peer); | |
17e6a59a AN |
1330 | } |
1331 | ||
d51c2ea3 AN |
1332 | if (ret == 0) |
1333 | ieee80211_queue_work(&sdata->local->hw, | |
1334 | &sdata->u.mgd.request_smps_work); | |
1335 | ||
17e6a59a AN |
1336 | mutex_unlock(&local->mtx); |
1337 | return ret; | |
95224fe8 | 1338 | } |
c887f0d3 AN |
1339 | |
1340 | void ieee80211_tdls_oper_request(struct ieee80211_vif *vif, const u8 *peer, | |
1341 | enum nl80211_tdls_operation oper, | |
1342 | u16 reason_code, gfp_t gfp) | |
1343 | { | |
1344 | struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); | |
1345 | ||
1346 | if (vif->type != NL80211_IFTYPE_STATION || !vif->bss_conf.assoc) { | |
1347 | sdata_err(sdata, "Discarding TDLS oper %d - not STA or disconnected\n", | |
1348 | oper); | |
1349 | return; | |
1350 | } | |
1351 | ||
1352 | cfg80211_tdls_oper_request(sdata->dev, peer, oper, reason_code, gfp); | |
1353 | } | |
1354 | EXPORT_SYMBOL(ieee80211_tdls_oper_request); | |
a7a6bdd0 AN |
1355 | |
1356 | static void | |
1357 | iee80211_tdls_add_ch_switch_timing(u8 *buf, u16 switch_time, u16 switch_timeout) | |
1358 | { | |
1359 | struct ieee80211_ch_switch_timing *ch_sw; | |
1360 | ||
1361 | *buf++ = WLAN_EID_CHAN_SWITCH_TIMING; | |
1362 | *buf++ = sizeof(struct ieee80211_ch_switch_timing); | |
1363 | ||
1364 | ch_sw = (void *)buf; | |
1365 | ch_sw->switch_time = cpu_to_le16(switch_time); | |
1366 | ch_sw->switch_timeout = cpu_to_le16(switch_timeout); | |
1367 | } | |
1368 | ||
1369 | /* find switch timing IE in SKB ready for Tx */ | |
1370 | static const u8 *ieee80211_tdls_find_sw_timing_ie(struct sk_buff *skb) | |
1371 | { | |
1372 | struct ieee80211_tdls_data *tf; | |
1373 | const u8 *ie_start; | |
1374 | ||
1375 | /* | |
1376 | * Get the offset for the new location of the switch timing IE. | |
1377 | * The SKB network header will now point to the "payload_type" | |
1378 | * element of the TDLS data frame struct. | |
1379 | */ | |
1380 | tf = container_of(skb->data + skb_network_offset(skb), | |
1381 | struct ieee80211_tdls_data, payload_type); | |
1382 | ie_start = tf->u.chan_switch_req.variable; | |
1383 | return cfg80211_find_ie(WLAN_EID_CHAN_SWITCH_TIMING, ie_start, | |
1384 | skb->len - (ie_start - skb->data)); | |
1385 | } | |
1386 | ||
1387 | static struct sk_buff * | |
1388 | ieee80211_tdls_ch_sw_tmpl_get(struct sta_info *sta, u8 oper_class, | |
1389 | struct cfg80211_chan_def *chandef, | |
1390 | u32 *ch_sw_tm_ie_offset) | |
1391 | { | |
1392 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1393 | u8 extra_ies[2 + sizeof(struct ieee80211_sec_chan_offs_ie) + | |
1394 | 2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1395 | int extra_ies_len = 2 + sizeof(struct ieee80211_ch_switch_timing); | |
1396 | u8 *pos = extra_ies; | |
1397 | struct sk_buff *skb; | |
1398 | ||
1399 | /* | |
1400 | * if chandef points to a wide channel add a Secondary-Channel | |
1401 | * Offset information element | |
1402 | */ | |
1403 | if (chandef->width == NL80211_CHAN_WIDTH_40) { | |
1404 | struct ieee80211_sec_chan_offs_ie *sec_chan_ie; | |
1405 | bool ht40plus; | |
1406 | ||
1407 | *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; | |
1408 | *pos++ = sizeof(*sec_chan_ie); | |
1409 | sec_chan_ie = (void *)pos; | |
1410 | ||
1411 | ht40plus = cfg80211_get_chandef_type(chandef) == | |
1412 | NL80211_CHAN_HT40PLUS; | |
1413 | sec_chan_ie->sec_chan_offs = ht40plus ? | |
1414 | IEEE80211_HT_PARAM_CHA_SEC_ABOVE : | |
1415 | IEEE80211_HT_PARAM_CHA_SEC_BELOW; | |
1416 | pos += sizeof(*sec_chan_ie); | |
1417 | ||
1418 | extra_ies_len += 2 + sizeof(struct ieee80211_sec_chan_offs_ie); | |
1419 | } | |
1420 | ||
1421 | /* just set the values to 0, this is a template */ | |
1422 | iee80211_tdls_add_ch_switch_timing(pos, 0, 0); | |
1423 | ||
1424 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1425 | WLAN_TDLS_CHANNEL_SWITCH_REQUEST, | |
1426 | 0, 0, !sta->sta.tdls_initiator, | |
1427 | extra_ies, extra_ies_len, | |
1428 | oper_class, chandef); | |
1429 | if (!skb) | |
1430 | return NULL; | |
1431 | ||
1432 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1433 | if (IS_ERR(skb)) { | |
1434 | tdls_dbg(sdata, "Failed building TDLS channel switch frame\n"); | |
1435 | return NULL; | |
1436 | } | |
1437 | ||
1438 | if (ch_sw_tm_ie_offset) { | |
1439 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1440 | ||
1441 | if (!tm_ie) { | |
1442 | tdls_dbg(sdata, "No switch timing IE in TDLS switch\n"); | |
1443 | dev_kfree_skb_any(skb); | |
1444 | return NULL; | |
1445 | } | |
1446 | ||
1447 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1448 | } | |
1449 | ||
1450 | tdls_dbg(sdata, | |
1451 | "TDLS channel switch request template for %pM ch %d width %d\n", | |
1452 | sta->sta.addr, chandef->chan->center_freq, chandef->width); | |
1453 | return skb; | |
1454 | } | |
1455 | ||
1456 | int | |
1457 | ieee80211_tdls_channel_switch(struct wiphy *wiphy, struct net_device *dev, | |
1458 | const u8 *addr, u8 oper_class, | |
1459 | struct cfg80211_chan_def *chandef) | |
1460 | { | |
1461 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1462 | struct ieee80211_local *local = sdata->local; | |
1463 | struct sta_info *sta; | |
1464 | struct sk_buff *skb = NULL; | |
1465 | u32 ch_sw_tm_ie; | |
1466 | int ret; | |
1467 | ||
1468 | mutex_lock(&local->sta_mtx); | |
1469 | sta = sta_info_get(sdata, addr); | |
1470 | if (!sta) { | |
1471 | tdls_dbg(sdata, | |
1472 | "Invalid TDLS peer %pM for channel switch request\n", | |
1473 | addr); | |
1474 | ret = -ENOENT; | |
1475 | goto out; | |
1476 | } | |
1477 | ||
1478 | if (!test_sta_flag(sta, WLAN_STA_TDLS_CHAN_SWITCH)) { | |
1479 | tdls_dbg(sdata, "TDLS channel switch unsupported by %pM\n", | |
1480 | addr); | |
1481 | ret = -ENOTSUPP; | |
1482 | goto out; | |
1483 | } | |
1484 | ||
1485 | skb = ieee80211_tdls_ch_sw_tmpl_get(sta, oper_class, chandef, | |
1486 | &ch_sw_tm_ie); | |
1487 | if (!skb) { | |
1488 | ret = -ENOENT; | |
1489 | goto out; | |
1490 | } | |
1491 | ||
1492 | ret = drv_tdls_channel_switch(local, sdata, &sta->sta, oper_class, | |
1493 | chandef, skb, ch_sw_tm_ie); | |
1494 | if (!ret) | |
1495 | set_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1496 | ||
1497 | out: | |
1498 | mutex_unlock(&local->sta_mtx); | |
1499 | dev_kfree_skb_any(skb); | |
1500 | return ret; | |
1501 | } | |
1502 | ||
1503 | void | |
1504 | ieee80211_tdls_cancel_channel_switch(struct wiphy *wiphy, | |
1505 | struct net_device *dev, | |
1506 | const u8 *addr) | |
1507 | { | |
1508 | struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); | |
1509 | struct ieee80211_local *local = sdata->local; | |
1510 | struct sta_info *sta; | |
1511 | ||
1512 | mutex_lock(&local->sta_mtx); | |
1513 | sta = sta_info_get(sdata, addr); | |
1514 | if (!sta) { | |
1515 | tdls_dbg(sdata, | |
1516 | "Invalid TDLS peer %pM for channel switch cancel\n", | |
1517 | addr); | |
1518 | goto out; | |
1519 | } | |
1520 | ||
1521 | if (!test_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL)) { | |
1522 | tdls_dbg(sdata, "TDLS channel switch not initiated by %pM\n", | |
1523 | addr); | |
1524 | goto out; | |
1525 | } | |
1526 | ||
1527 | drv_tdls_cancel_channel_switch(local, sdata, &sta->sta); | |
1528 | clear_sta_flag(sta, WLAN_STA_TDLS_OFF_CHANNEL); | |
1529 | ||
1530 | out: | |
1531 | mutex_unlock(&local->sta_mtx); | |
1532 | } | |
8a4d32f3 AN |
1533 | |
1534 | static struct sk_buff * | |
1535 | ieee80211_tdls_ch_sw_resp_tmpl_get(struct sta_info *sta, | |
1536 | u32 *ch_sw_tm_ie_offset) | |
1537 | { | |
1538 | struct ieee80211_sub_if_data *sdata = sta->sdata; | |
1539 | struct sk_buff *skb; | |
1540 | u8 extra_ies[2 + sizeof(struct ieee80211_ch_switch_timing)]; | |
1541 | ||
1542 | /* initial timing are always zero in the template */ | |
1543 | iee80211_tdls_add_ch_switch_timing(extra_ies, 0, 0); | |
1544 | ||
1545 | skb = ieee80211_tdls_build_mgmt_packet_data(sdata, sta->sta.addr, | |
1546 | WLAN_TDLS_CHANNEL_SWITCH_RESPONSE, | |
1547 | 0, 0, !sta->sta.tdls_initiator, | |
1548 | extra_ies, sizeof(extra_ies), 0, NULL); | |
1549 | if (!skb) | |
1550 | return NULL; | |
1551 | ||
1552 | skb = ieee80211_build_data_template(sdata, skb, 0); | |
1553 | if (IS_ERR(skb)) { | |
1554 | tdls_dbg(sdata, | |
1555 | "Failed building TDLS channel switch resp frame\n"); | |
1556 | return NULL; | |
1557 | } | |
1558 | ||
1559 | if (ch_sw_tm_ie_offset) { | |
1560 | const u8 *tm_ie = ieee80211_tdls_find_sw_timing_ie(skb); | |
1561 | ||
1562 | if (!tm_ie) { | |
1563 | tdls_dbg(sdata, | |
1564 | "No switch timing IE in TDLS switch resp\n"); | |
1565 | dev_kfree_skb_any(skb); | |
1566 | return NULL; | |
1567 | } | |
1568 | ||
1569 | *ch_sw_tm_ie_offset = tm_ie - skb->data; | |
1570 | } | |
1571 | ||
1572 | tdls_dbg(sdata, "TDLS get channel switch response template for %pM\n", | |
1573 | sta->sta.addr); | |
1574 | return skb; | |
1575 | } | |
1576 | ||
1577 | static int | |
1578 | ieee80211_process_tdls_channel_switch_resp(struct ieee80211_sub_if_data *sdata, | |
1579 | struct sk_buff *skb) | |
1580 | { | |
1581 | struct ieee80211_local *local = sdata->local; | |
1582 | struct ieee802_11_elems elems; | |
1583 | struct sta_info *sta; | |
1584 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1585 | bool local_initiator; | |
1586 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1587 | int baselen = offsetof(typeof(*tf), u.chan_switch_resp.variable); | |
1588 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1589 | int ret; | |
1590 | ||
1591 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_RESPONSE; | |
1592 | params.timestamp = rx_status->device_timestamp; | |
1593 | ||
1594 | if (skb->len < baselen) { | |
1595 | tdls_dbg(sdata, "TDLS channel switch resp too short: %d\n", | |
1596 | skb->len); | |
1597 | return -EINVAL; | |
1598 | } | |
1599 | ||
1600 | mutex_lock(&local->sta_mtx); | |
1601 | sta = sta_info_get(sdata, tf->sa); | |
1602 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1603 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1604 | tf->sa); | |
1605 | ret = -EINVAL; | |
1606 | goto out; | |
1607 | } | |
1608 | ||
1609 | params.sta = &sta->sta; | |
1610 | params.status = le16_to_cpu(tf->u.chan_switch_resp.status_code); | |
1611 | if (params.status != 0) { | |
1612 | ret = 0; | |
1613 | goto call_drv; | |
1614 | } | |
1615 | ||
1616 | ieee802_11_parse_elems(tf->u.chan_switch_resp.variable, | |
1617 | skb->len - baselen, false, &elems); | |
1618 | if (elems.parse_error) { | |
1619 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch resp\n"); | |
1620 | ret = -EINVAL; | |
1621 | goto out; | |
1622 | } | |
1623 | ||
1624 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1625 | tdls_dbg(sdata, "TDLS channel switch resp - missing IEs\n"); | |
1626 | ret = -EINVAL; | |
1627 | goto out; | |
1628 | } | |
1629 | ||
1630 | /* validate the initiator is set correctly */ | |
1631 | local_initiator = | |
1632 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1633 | if (local_initiator == sta->sta.tdls_initiator) { | |
1634 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1635 | ret = -EINVAL; | |
1636 | goto out; | |
1637 | } | |
1638 | ||
1639 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1640 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1641 | ||
1642 | params.tmpl_skb = | |
1643 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, ¶ms.ch_sw_tm_ie); | |
1644 | if (!params.tmpl_skb) { | |
1645 | ret = -ENOENT; | |
1646 | goto out; | |
1647 | } | |
1648 | ||
1649 | call_drv: | |
1650 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1651 | ||
1652 | tdls_dbg(sdata, | |
1653 | "TDLS channel switch response received from %pM status %d\n", | |
1654 | tf->sa, params.status); | |
1655 | ||
1656 | out: | |
1657 | mutex_unlock(&local->sta_mtx); | |
1658 | dev_kfree_skb_any(params.tmpl_skb); | |
1659 | return ret; | |
1660 | } | |
1661 | ||
1662 | static int | |
1663 | ieee80211_process_tdls_channel_switch_req(struct ieee80211_sub_if_data *sdata, | |
1664 | struct sk_buff *skb) | |
1665 | { | |
1666 | struct ieee80211_local *local = sdata->local; | |
1667 | struct ieee802_11_elems elems; | |
1668 | struct cfg80211_chan_def chandef; | |
1669 | struct ieee80211_channel *chan; | |
1670 | enum nl80211_channel_type chan_type; | |
1671 | int freq; | |
1672 | u8 target_channel, oper_class; | |
1673 | bool local_initiator; | |
1674 | struct sta_info *sta; | |
1675 | enum ieee80211_band band; | |
1676 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1677 | struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb); | |
1678 | int baselen = offsetof(typeof(*tf), u.chan_switch_req.variable); | |
1679 | struct ieee80211_tdls_ch_sw_params params = {}; | |
1680 | int ret = 0; | |
1681 | ||
1682 | params.action_code = WLAN_TDLS_CHANNEL_SWITCH_REQUEST; | |
1683 | params.timestamp = rx_status->device_timestamp; | |
1684 | ||
1685 | if (skb->len < baselen) { | |
1686 | tdls_dbg(sdata, "TDLS channel switch req too short: %d\n", | |
1687 | skb->len); | |
1688 | return -EINVAL; | |
1689 | } | |
1690 | ||
1691 | target_channel = tf->u.chan_switch_req.target_channel; | |
1692 | oper_class = tf->u.chan_switch_req.oper_class; | |
1693 | ||
1694 | /* | |
1695 | * We can't easily infer the channel band. The operating class is | |
1696 | * ambiguous - there are multiple tables (US/Europe/JP/Global). The | |
1697 | * solution here is to treat channels with number >14 as 5GHz ones, | |
1698 | * and specifically check for the (oper_class, channel) combinations | |
1699 | * where this doesn't hold. These are thankfully unique according to | |
1700 | * IEEE802.11-2012. | |
1701 | * We consider only the 2GHz and 5GHz bands and 20MHz+ channels as | |
1702 | * valid here. | |
1703 | */ | |
1704 | if ((oper_class == 112 || oper_class == 2 || oper_class == 3 || | |
1705 | oper_class == 4 || oper_class == 5 || oper_class == 6) && | |
1706 | target_channel < 14) | |
1707 | band = IEEE80211_BAND_5GHZ; | |
1708 | else | |
1709 | band = target_channel < 14 ? IEEE80211_BAND_2GHZ : | |
1710 | IEEE80211_BAND_5GHZ; | |
1711 | ||
1712 | freq = ieee80211_channel_to_frequency(target_channel, band); | |
1713 | if (freq == 0) { | |
1714 | tdls_dbg(sdata, "Invalid channel in TDLS chan switch: %d\n", | |
1715 | target_channel); | |
1716 | return -EINVAL; | |
1717 | } | |
1718 | ||
1719 | chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq); | |
1720 | if (!chan) { | |
1721 | tdls_dbg(sdata, | |
1722 | "Unsupported channel for TDLS chan switch: %d\n", | |
1723 | target_channel); | |
1724 | return -EINVAL; | |
1725 | } | |
1726 | ||
1727 | ieee802_11_parse_elems(tf->u.chan_switch_req.variable, | |
1728 | skb->len - baselen, false, &elems); | |
1729 | if (elems.parse_error) { | |
1730 | tdls_dbg(sdata, "Invalid IEs in TDLS channel switch req\n"); | |
1731 | return -EINVAL; | |
1732 | } | |
1733 | ||
1734 | if (!elems.ch_sw_timing || !elems.lnk_id) { | |
1735 | tdls_dbg(sdata, "TDLS channel switch req - missing IEs\n"); | |
1736 | return -EINVAL; | |
1737 | } | |
1738 | ||
1739 | mutex_lock(&local->sta_mtx); | |
1740 | sta = sta_info_get(sdata, tf->sa); | |
1741 | if (!sta || !test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH)) { | |
1742 | tdls_dbg(sdata, "TDLS chan switch from non-peer sta %pM\n", | |
1743 | tf->sa); | |
1744 | ret = -EINVAL; | |
1745 | goto out; | |
1746 | } | |
1747 | ||
1748 | params.sta = &sta->sta; | |
1749 | ||
1750 | /* validate the initiator is set correctly */ | |
1751 | local_initiator = | |
1752 | !memcmp(elems.lnk_id->init_sta, sdata->vif.addr, ETH_ALEN); | |
1753 | if (local_initiator == sta->sta.tdls_initiator) { | |
1754 | tdls_dbg(sdata, "TDLS chan switch invalid lnk-id initiator\n"); | |
1755 | ret = -EINVAL; | |
1756 | goto out; | |
1757 | } | |
1758 | ||
1759 | if (!sta->sta.ht_cap.ht_supported) { | |
1760 | chan_type = NL80211_CHAN_NO_HT; | |
1761 | } else if (!elems.sec_chan_offs) { | |
1762 | chan_type = NL80211_CHAN_HT20; | |
1763 | } else { | |
1764 | switch (elems.sec_chan_offs->sec_chan_offs) { | |
1765 | case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: | |
1766 | chan_type = NL80211_CHAN_HT40PLUS; | |
1767 | break; | |
1768 | case IEEE80211_HT_PARAM_CHA_SEC_BELOW: | |
1769 | chan_type = NL80211_CHAN_HT40MINUS; | |
1770 | break; | |
1771 | default: | |
1772 | chan_type = NL80211_CHAN_HT20; | |
1773 | break; | |
1774 | } | |
1775 | } | |
1776 | ||
1777 | cfg80211_chandef_create(&chandef, chan, chan_type); | |
1778 | params.chandef = &chandef; | |
1779 | ||
1780 | params.switch_time = le16_to_cpu(elems.ch_sw_timing->switch_time); | |
1781 | params.switch_timeout = le16_to_cpu(elems.ch_sw_timing->switch_timeout); | |
1782 | ||
1783 | params.tmpl_skb = | |
1784 | ieee80211_tdls_ch_sw_resp_tmpl_get(sta, | |
1785 | ¶ms.ch_sw_tm_ie); | |
1786 | if (!params.tmpl_skb) { | |
1787 | ret = -ENOENT; | |
1788 | goto out; | |
1789 | } | |
1790 | ||
1791 | drv_tdls_recv_channel_switch(sdata->local, sdata, ¶ms); | |
1792 | ||
1793 | tdls_dbg(sdata, | |
1794 | "TDLS ch switch request received from %pM ch %d width %d\n", | |
1795 | tf->sa, params.chandef->chan->center_freq, | |
1796 | params.chandef->width); | |
1797 | out: | |
1798 | mutex_unlock(&local->sta_mtx); | |
1799 | dev_kfree_skb_any(params.tmpl_skb); | |
1800 | return ret; | |
1801 | } | |
1802 | ||
1803 | void ieee80211_process_tdls_channel_switch(struct ieee80211_sub_if_data *sdata, | |
1804 | struct sk_buff *skb) | |
1805 | { | |
1806 | struct ieee80211_tdls_data *tf = (void *)skb->data; | |
1807 | struct wiphy *wiphy = sdata->local->hw.wiphy; | |
1808 | ||
1809 | /* make sure the driver supports it */ | |
1810 | if (!(wiphy->features & NL80211_FEATURE_TDLS_CHANNEL_SWITCH)) | |
1811 | return; | |
1812 | ||
1813 | /* we want to access the entire packet */ | |
1814 | if (skb_linearize(skb)) | |
1815 | return; | |
1816 | /* | |
1817 | * The packet/size was already validated by mac80211 Rx path, only look | |
1818 | * at the action type. | |
1819 | */ | |
1820 | switch (tf->action_code) { | |
1821 | case WLAN_TDLS_CHANNEL_SWITCH_REQUEST: | |
1822 | ieee80211_process_tdls_channel_switch_req(sdata, skb); | |
1823 | break; | |
1824 | case WLAN_TDLS_CHANNEL_SWITCH_RESPONSE: | |
1825 | ieee80211_process_tdls_channel_switch_resp(sdata, skb); | |
1826 | break; | |
1827 | default: | |
1828 | WARN_ON_ONCE(1); | |
1829 | return; | |
1830 | } | |
1831 | } | |
d51c2ea3 AN |
1832 | |
1833 | void ieee80211_teardown_tdls_peers(struct ieee80211_sub_if_data *sdata) | |
1834 | { | |
1835 | struct sta_info *sta; | |
1836 | u16 reason = WLAN_REASON_TDLS_TEARDOWN_UNSPECIFIED; | |
1837 | ||
1838 | rcu_read_lock(); | |
1839 | list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) { | |
1840 | if (!sta->sta.tdls || sta->sdata != sdata || !sta->uploaded || | |
1841 | !test_sta_flag(sta, WLAN_STA_AUTHORIZED)) | |
1842 | continue; | |
1843 | ||
1844 | ieee80211_tdls_oper_request(&sdata->vif, sta->sta.addr, | |
1845 | NL80211_TDLS_TEARDOWN, reason, | |
1846 | GFP_ATOMIC); | |
1847 | } | |
1848 | rcu_read_unlock(); | |
1849 | } |