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