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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
2a519311 JB |
2 | /* |
3 | * cfg80211 scan result handling | |
4 | * | |
5 | * Copyright 2008 Johannes Berg <johannes@sipsolutions.net> | |
2740f0cf | 6 | * Copyright 2013-2014 Intel Mobile Communications GmbH |
1d76250b | 7 | * Copyright 2016 Intel Deutschland GmbH |
7b5e25b8 | 8 | * Copyright (C) 2018-2024 Intel Corporation |
2a519311 JB |
9 | */ |
10 | #include <linux/kernel.h> | |
5a0e3ad6 | 11 | #include <linux/slab.h> |
2a519311 JB |
12 | #include <linux/module.h> |
13 | #include <linux/netdevice.h> | |
14 | #include <linux/wireless.h> | |
15 | #include <linux/nl80211.h> | |
16 | #include <linux/etherdevice.h> | |
c8cb5b85 TM |
17 | #include <linux/crc32.h> |
18 | #include <linux/bitfield.h> | |
2a519311 JB |
19 | #include <net/arp.h> |
20 | #include <net/cfg80211.h> | |
262eb9b2 | 21 | #include <net/cfg80211-wext.h> |
2a519311 | 22 | #include <net/iw_handler.h> |
9d027a35 | 23 | #include <kunit/visibility.h> |
2a519311 JB |
24 | #include "core.h" |
25 | #include "nl80211.h" | |
a9a11622 | 26 | #include "wext-compat.h" |
e35e4d28 | 27 | #include "rdev-ops.h" |
2a519311 | 28 | |
776b3580 JB |
29 | /** |
30 | * DOC: BSS tree/list structure | |
31 | * | |
32 | * At the top level, the BSS list is kept in both a list in each | |
33 | * registered device (@bss_list) as well as an RB-tree for faster | |
34 | * lookup. In the RB-tree, entries can be looked up using their | |
35 | * channel, MESHID, MESHCONF (for MBSSes) or channel, BSSID, SSID | |
36 | * for other BSSes. | |
37 | * | |
38 | * Due to the possibility of hidden SSIDs, there's a second level | |
39 | * structure, the "hidden_list" and "hidden_beacon_bss" pointer. | |
40 | * The hidden_list connects all BSSes belonging to a single AP | |
41 | * that has a hidden SSID, and connects beacon and probe response | |
42 | * entries. For a probe response entry for a hidden SSID, the | |
43 | * hidden_beacon_bss pointer points to the BSS struct holding the | |
44 | * beacon's information. | |
45 | * | |
46 | * Reference counting is done for all these references except for | |
47 | * the hidden_list, so that a beacon BSS struct that is otherwise | |
48 | * not referenced has one reference for being on the bss_list and | |
49 | * one for each probe response entry that points to it using the | |
50 | * hidden_beacon_bss pointer. When a BSS struct that has such a | |
51 | * pointer is get/put, the refcount update is also propagated to | |
52 | * the referenced struct, this ensure that it cannot get removed | |
53 | * while somebody is using the probe response version. | |
54 | * | |
55 | * Note that the hidden_beacon_bss pointer never changes, due to | |
56 | * the reference counting. Therefore, no locking is needed for | |
57 | * it. | |
58 | * | |
59 | * Also note that the hidden_beacon_bss pointer is only relevant | |
60 | * if the driver uses something other than the IEs, e.g. private | |
8cf5c86d | 61 | * data stored in the BSS struct, since the beacon IEs are |
776b3580 JB |
62 | * also linked into the probe response struct. |
63 | */ | |
64 | ||
9853a55e JB |
65 | /* |
66 | * Limit the number of BSS entries stored in mac80211. Each one is | |
67 | * a bit over 4k at most, so this limits to roughly 4-5M of memory. | |
68 | * If somebody wants to really attack this though, they'd likely | |
69 | * use small beacons, and only one type of frame, limiting each of | |
70 | * the entries to a much smaller size (in order to generate more | |
71 | * entries in total, so overhead is bigger.) | |
72 | */ | |
73 | static int bss_entries_limit = 1000; | |
74 | module_param(bss_entries_limit, int, 0644); | |
75 | MODULE_PARM_DESC(bss_entries_limit, | |
76 | "limit to number of scan BSS entries (per wiphy, default 1000)"); | |
77 | ||
f9616e0f | 78 | #define IEEE80211_SCAN_RESULT_EXPIRE (30 * HZ) |
2a519311 | 79 | |
776b3580 | 80 | static void bss_free(struct cfg80211_internal_bss *bss) |
e8e27c66 | 81 | { |
9caf0364 | 82 | struct cfg80211_bss_ies *ies; |
b629ea3d JB |
83 | |
84 | if (WARN_ON(atomic_read(&bss->hold))) | |
85 | return; | |
86 | ||
9caf0364 | 87 | ies = (void *)rcu_access_pointer(bss->pub.beacon_ies); |
776b3580 | 88 | if (ies && !bss->pub.hidden_beacon_bss) |
9caf0364 JB |
89 | kfree_rcu(ies, rcu_head); |
90 | ies = (void *)rcu_access_pointer(bss->pub.proberesp_ies); | |
91 | if (ies) | |
92 | kfree_rcu(ies, rcu_head); | |
e8e27c66 | 93 | |
776b3580 JB |
94 | /* |
95 | * This happens when the module is removed, it doesn't | |
96 | * really matter any more save for completeness | |
97 | */ | |
98 | if (!list_empty(&bss->hidden_list)) | |
99 | list_del(&bss->hidden_list); | |
100 | ||
e8e27c66 AK |
101 | kfree(bss); |
102 | } | |
103 | ||
1b8ec87a | 104 | static inline void bss_ref_get(struct cfg80211_registered_device *rdev, |
776b3580 | 105 | struct cfg80211_internal_bss *bss) |
0532d4f1 | 106 | { |
1b8ec87a | 107 | lockdep_assert_held(&rdev->bss_lock); |
776b3580 JB |
108 | |
109 | bss->refcount++; | |
0b780881 JB |
110 | |
111 | if (bss->pub.hidden_beacon_bss) | |
112 | bss_from_pub(bss->pub.hidden_beacon_bss)->refcount++; | |
113 | ||
114 | if (bss->pub.transmitted_bss) | |
115 | bss_from_pub(bss->pub.transmitted_bss)->refcount++; | |
0532d4f1 JB |
116 | } |
117 | ||
1b8ec87a | 118 | static inline void bss_ref_put(struct cfg80211_registered_device *rdev, |
776b3580 | 119 | struct cfg80211_internal_bss *bss) |
0532d4f1 | 120 | { |
1b8ec87a | 121 | lockdep_assert_held(&rdev->bss_lock); |
776b3580 JB |
122 | |
123 | if (bss->pub.hidden_beacon_bss) { | |
124 | struct cfg80211_internal_bss *hbss; | |
61e41e5d JB |
125 | |
126 | hbss = bss_from_pub(bss->pub.hidden_beacon_bss); | |
776b3580 JB |
127 | hbss->refcount--; |
128 | if (hbss->refcount == 0) | |
129 | bss_free(hbss); | |
130 | } | |
a3584f56 | 131 | |
7011ba58 | 132 | if (bss->pub.transmitted_bss) { |
a3584f56 SS |
133 | struct cfg80211_internal_bss *tbss; |
134 | ||
61e41e5d | 135 | tbss = bss_from_pub(bss->pub.transmitted_bss); |
a3584f56 SS |
136 | tbss->refcount--; |
137 | if (tbss->refcount == 0) | |
138 | bss_free(tbss); | |
139 | } | |
140 | ||
776b3580 JB |
141 | bss->refcount--; |
142 | if (bss->refcount == 0) | |
143 | bss_free(bss); | |
0532d4f1 JB |
144 | } |
145 | ||
1b8ec87a | 146 | static bool __cfg80211_unlink_bss(struct cfg80211_registered_device *rdev, |
e8e27c66 AK |
147 | struct cfg80211_internal_bss *bss) |
148 | { | |
1b8ec87a | 149 | lockdep_assert_held(&rdev->bss_lock); |
4b1af479 | 150 | |
776b3580 JB |
151 | if (!list_empty(&bss->hidden_list)) { |
152 | /* | |
153 | * don't remove the beacon entry if it has | |
154 | * probe responses associated with it | |
155 | */ | |
156 | if (!bss->pub.hidden_beacon_bss) | |
157 | return false; | |
158 | /* | |
159 | * if it's a probe response entry break its | |
160 | * link to the other entries in the group | |
161 | */ | |
162 | list_del_init(&bss->hidden_list); | |
163 | } | |
164 | ||
e8e27c66 | 165 | list_del_init(&bss->list); |
7011ba58 | 166 | list_del_init(&bss->pub.nontrans_list); |
1b8ec87a | 167 | rb_erase(&bss->rbn, &rdev->bss_tree); |
9853a55e JB |
168 | rdev->bss_entries--; |
169 | WARN_ONCE((rdev->bss_entries == 0) ^ list_empty(&rdev->bss_list), | |
170 | "rdev bss entries[%d]/list[empty:%d] corruption\n", | |
171 | rdev->bss_entries, list_empty(&rdev->bss_list)); | |
1b8ec87a | 172 | bss_ref_put(rdev, bss); |
776b3580 | 173 | return true; |
e8e27c66 AK |
174 | } |
175 | ||
f7dacfb1 SS |
176 | bool cfg80211_is_element_inherited(const struct element *elem, |
177 | const struct element *non_inherit_elem) | |
178 | { | |
179 | u8 id_len, ext_id_len, i, loop_len, id; | |
180 | const u8 *list; | |
181 | ||
182 | if (elem->id == WLAN_EID_MULTIPLE_BSSID) | |
183 | return false; | |
891d4d58 BB |
184 | |
185 | if (elem->id == WLAN_EID_EXTENSION && elem->datalen > 1 && | |
186 | elem->data[0] == WLAN_EID_EXT_EHT_MULTI_LINK) | |
187 | return false; | |
f7dacfb1 SS |
188 | |
189 | if (!non_inherit_elem || non_inherit_elem->datalen < 2) | |
190 | return true; | |
191 | ||
192 | /* | |
193 | * non inheritance element format is: | |
194 | * ext ID (56) | IDs list len | list | extension IDs list len | list | |
195 | * Both lists are optional. Both lengths are mandatory. | |
196 | * This means valid length is: | |
197 | * elem_len = 1 (extension ID) + 2 (list len fields) + list lengths | |
198 | */ | |
199 | id_len = non_inherit_elem->data[1]; | |
200 | if (non_inherit_elem->datalen < 3 + id_len) | |
201 | return true; | |
202 | ||
203 | ext_id_len = non_inherit_elem->data[2 + id_len]; | |
204 | if (non_inherit_elem->datalen < 3 + id_len + ext_id_len) | |
205 | return true; | |
206 | ||
207 | if (elem->id == WLAN_EID_EXTENSION) { | |
208 | if (!ext_id_len) | |
209 | return true; | |
210 | loop_len = ext_id_len; | |
211 | list = &non_inherit_elem->data[3 + id_len]; | |
212 | id = elem->data[0]; | |
213 | } else { | |
214 | if (!id_len) | |
215 | return true; | |
216 | loop_len = id_len; | |
217 | list = &non_inherit_elem->data[2]; | |
218 | id = elem->id; | |
219 | } | |
220 | ||
221 | for (i = 0; i < loop_len; i++) { | |
222 | if (list[i] == id) | |
223 | return false; | |
224 | } | |
225 | ||
226 | return true; | |
227 | } | |
228 | EXPORT_SYMBOL(cfg80211_is_element_inherited); | |
229 | ||
dfd9aa3e BB |
230 | static size_t cfg80211_copy_elem_with_frags(const struct element *elem, |
231 | const u8 *ie, size_t ie_len, | |
232 | u8 **pos, u8 *buf, size_t buf_len) | |
0b8fb823 | 233 | { |
dfd9aa3e BB |
234 | if (WARN_ON((u8 *)elem < ie || elem->data > ie + ie_len || |
235 | elem->data + elem->datalen > ie + ie_len)) | |
236 | return 0; | |
0b8fb823 | 237 | |
dfd9aa3e | 238 | if (elem->datalen + 2 > buf + buf_len - *pos) |
0b8fb823 | 239 | return 0; |
0b8fb823 | 240 | |
dfd9aa3e BB |
241 | memcpy(*pos, elem, elem->datalen + 2); |
242 | *pos += elem->datalen + 2; | |
0b8fb823 | 243 | |
dfd9aa3e BB |
244 | /* Finish if it is not fragmented */ |
245 | if (elem->datalen != 255) | |
246 | return *pos - buf; | |
247 | ||
248 | ie_len = ie + ie_len - elem->data - elem->datalen; | |
249 | ie = (const u8 *)elem->data + elem->datalen; | |
250 | ||
251 | for_each_element(elem, ie, ie_len) { | |
252 | if (elem->id != WLAN_EID_FRAGMENT) | |
253 | break; | |
254 | ||
255 | if (elem->datalen + 2 > buf + buf_len - *pos) | |
256 | return 0; | |
257 | ||
258 | memcpy(*pos, elem, elem->datalen + 2); | |
259 | *pos += elem->datalen + 2; | |
260 | ||
261 | if (elem->datalen != 255) | |
262 | break; | |
0b8fb823 PX |
263 | } |
264 | ||
dfd9aa3e BB |
265 | return *pos - buf; |
266 | } | |
f7dacfb1 | 267 | |
9d027a35 BB |
268 | VISIBLE_IF_CFG80211_KUNIT size_t |
269 | cfg80211_gen_new_ie(const u8 *ie, size_t ielen, | |
270 | const u8 *subie, size_t subie_len, | |
271 | u8 *new_ie, size_t new_ie_len) | |
dfd9aa3e BB |
272 | { |
273 | const struct element *non_inherit_elem, *parent, *sub; | |
274 | u8 *pos = new_ie; | |
275 | u8 id, ext_id; | |
276 | unsigned int match_len; | |
277 | ||
278 | non_inherit_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE, | |
279 | subie, subie_len); | |
280 | ||
281 | /* We copy the elements one by one from the parent to the generated | |
282 | * elements. | |
283 | * If they are not inherited (included in subie or in the non | |
284 | * inheritance element), then we copy all occurrences the first time | |
285 | * we see this element type. | |
0b8fb823 | 286 | */ |
dfd9aa3e BB |
287 | for_each_element(parent, ie, ielen) { |
288 | if (parent->id == WLAN_EID_FRAGMENT) | |
0b8fb823 | 289 | continue; |
dfd9aa3e BB |
290 | |
291 | if (parent->id == WLAN_EID_EXTENSION) { | |
292 | if (parent->datalen < 1) | |
293 | continue; | |
294 | ||
295 | id = WLAN_EID_EXTENSION; | |
296 | ext_id = parent->data[0]; | |
297 | match_len = 1; | |
298 | } else { | |
299 | id = parent->id; | |
300 | match_len = 0; | |
0b8fb823 PX |
301 | } |
302 | ||
dfd9aa3e BB |
303 | /* Find first occurrence in subie */ |
304 | sub = cfg80211_find_elem_match(id, subie, subie_len, | |
305 | &ext_id, match_len, 0); | |
c17fe043 | 306 | |
dfd9aa3e BB |
307 | /* Copy from parent if not in subie and inherited */ |
308 | if (!sub && | |
309 | cfg80211_is_element_inherited(parent, non_inherit_elem)) { | |
310 | if (!cfg80211_copy_elem_with_frags(parent, | |
311 | ie, ielen, | |
312 | &pos, new_ie, | |
313 | new_ie_len)) | |
314 | return 0; | |
f7dacfb1 | 315 | |
dfd9aa3e | 316 | continue; |
0b8fb823 PX |
317 | } |
318 | ||
dfd9aa3e BB |
319 | /* Already copied if an earlier element had the same type */ |
320 | if (cfg80211_find_elem_match(id, ie, (u8 *)parent - ie, | |
321 | &ext_id, match_len, 0)) | |
322 | continue; | |
0b8fb823 | 323 | |
dfd9aa3e BB |
324 | /* Not inheriting, copy all similar elements from subie */ |
325 | while (sub) { | |
326 | if (!cfg80211_copy_elem_with_frags(sub, | |
327 | subie, subie_len, | |
328 | &pos, new_ie, | |
329 | new_ie_len)) | |
330 | return 0; | |
331 | ||
332 | sub = cfg80211_find_elem_match(id, | |
333 | sub->data + sub->datalen, | |
334 | subie_len + subie - | |
335 | (sub->data + | |
336 | sub->datalen), | |
337 | &ext_id, match_len, 0); | |
338 | } | |
0b8fb823 PX |
339 | } |
340 | ||
dfd9aa3e BB |
341 | /* The above misses elements that are included in subie but not in the |
342 | * parent, so do a pass over subie and append those. | |
343 | * Skip the non-tx BSSID caps and non-inheritance element. | |
0b8fb823 | 344 | */ |
dfd9aa3e BB |
345 | for_each_element(sub, subie, subie_len) { |
346 | if (sub->id == WLAN_EID_NON_TX_BSSID_CAP) | |
347 | continue; | |
348 | ||
349 | if (sub->id == WLAN_EID_FRAGMENT) | |
350 | continue; | |
351 | ||
352 | if (sub->id == WLAN_EID_EXTENSION) { | |
353 | if (sub->datalen < 1) | |
354 | continue; | |
355 | ||
356 | id = WLAN_EID_EXTENSION; | |
357 | ext_id = sub->data[0]; | |
358 | match_len = 1; | |
359 | ||
360 | if (ext_id == WLAN_EID_EXT_NON_INHERITANCE) | |
361 | continue; | |
362 | } else { | |
363 | id = sub->id; | |
364 | match_len = 0; | |
0b8fb823 | 365 | } |
dfd9aa3e BB |
366 | |
367 | /* Processed if one was included in the parent */ | |
368 | if (cfg80211_find_elem_match(id, ie, ielen, | |
369 | &ext_id, match_len, 0)) | |
370 | continue; | |
371 | ||
372 | if (!cfg80211_copy_elem_with_frags(sub, subie, subie_len, | |
373 | &pos, new_ie, new_ie_len)) | |
374 | return 0; | |
0b8fb823 PX |
375 | } |
376 | ||
0b8fb823 PX |
377 | return pos - new_ie; |
378 | } | |
9d027a35 | 379 | EXPORT_SYMBOL_IF_CFG80211_KUNIT(cfg80211_gen_new_ie); |
0b8fb823 PX |
380 | |
381 | static bool is_bss(struct cfg80211_bss *a, const u8 *bssid, | |
382 | const u8 *ssid, size_t ssid_len) | |
383 | { | |
384 | const struct cfg80211_bss_ies *ies; | |
a3eca817 | 385 | const struct element *ssid_elem; |
0b8fb823 PX |
386 | |
387 | if (bssid && !ether_addr_equal(a->bssid, bssid)) | |
388 | return false; | |
389 | ||
390 | if (!ssid) | |
391 | return true; | |
392 | ||
393 | ies = rcu_access_pointer(a->ies); | |
394 | if (!ies) | |
395 | return false; | |
a3eca817 JB |
396 | ssid_elem = cfg80211_find_elem(WLAN_EID_SSID, ies->data, ies->len); |
397 | if (!ssid_elem) | |
0b8fb823 | 398 | return false; |
a3eca817 | 399 | if (ssid_elem->datalen != ssid_len) |
0b8fb823 | 400 | return false; |
a3eca817 | 401 | return memcmp(ssid_elem->data, ssid, ssid_len) == 0; |
0b8fb823 PX |
402 | } |
403 | ||
404 | static int | |
7011ba58 SS |
405 | cfg80211_add_nontrans_list(struct cfg80211_bss *trans_bss, |
406 | struct cfg80211_bss *nontrans_bss) | |
0b8fb823 | 407 | { |
fb8b53ac | 408 | const struct element *ssid_elem; |
7011ba58 | 409 | struct cfg80211_bss *bss = NULL; |
0b8fb823 PX |
410 | |
411 | rcu_read_lock(); | |
fb8b53ac JB |
412 | ssid_elem = ieee80211_bss_get_elem(nontrans_bss, WLAN_EID_SSID); |
413 | if (!ssid_elem) { | |
0b8fb823 PX |
414 | rcu_read_unlock(); |
415 | return -EINVAL; | |
416 | } | |
0b8fb823 PX |
417 | |
418 | /* check if nontrans_bss is in the list */ | |
419 | list_for_each_entry(bss, &trans_bss->nontrans_list, nontrans_list) { | |
fb8b53ac JB |
420 | if (is_bss(bss, nontrans_bss->bssid, ssid_elem->data, |
421 | ssid_elem->datalen)) { | |
a2083eeb | 422 | rcu_read_unlock(); |
0b8fb823 | 423 | return 0; |
a2083eeb | 424 | } |
0b8fb823 PX |
425 | } |
426 | ||
a2083eeb JB |
427 | rcu_read_unlock(); |
428 | ||
bcca8520 JB |
429 | /* |
430 | * This is a bit weird - it's not on the list, but already on another | |
431 | * one! The only way that could happen is if there's some BSSID/SSID | |
432 | * shared by multiple APs in their multi-BSSID profiles, potentially | |
433 | * with hidden SSID mixed in ... ignore it. | |
434 | */ | |
435 | if (!list_empty(&nontrans_bss->nontrans_list)) | |
436 | return -EINVAL; | |
437 | ||
0b8fb823 PX |
438 | /* add to the list */ |
439 | list_add_tail(&nontrans_bss->nontrans_list, &trans_bss->nontrans_list); | |
440 | return 0; | |
441 | } | |
442 | ||
1b8ec87a | 443 | static void __cfg80211_bss_expire(struct cfg80211_registered_device *rdev, |
15d6030b SL |
444 | unsigned long expire_time) |
445 | { | |
446 | struct cfg80211_internal_bss *bss, *tmp; | |
447 | bool expired = false; | |
448 | ||
1b8ec87a | 449 | lockdep_assert_held(&rdev->bss_lock); |
4b1af479 | 450 | |
1b8ec87a | 451 | list_for_each_entry_safe(bss, tmp, &rdev->bss_list, list) { |
15d6030b SL |
452 | if (atomic_read(&bss->hold)) |
453 | continue; | |
454 | if (!time_after(expire_time, bss->ts)) | |
455 | continue; | |
456 | ||
1b8ec87a | 457 | if (__cfg80211_unlink_bss(rdev, bss)) |
776b3580 | 458 | expired = true; |
15d6030b SL |
459 | } |
460 | ||
461 | if (expired) | |
1b8ec87a | 462 | rdev->bss_generation++; |
15d6030b SL |
463 | } |
464 | ||
9853a55e JB |
465 | static bool cfg80211_bss_expire_oldest(struct cfg80211_registered_device *rdev) |
466 | { | |
467 | struct cfg80211_internal_bss *bss, *oldest = NULL; | |
468 | bool ret; | |
469 | ||
470 | lockdep_assert_held(&rdev->bss_lock); | |
471 | ||
472 | list_for_each_entry(bss, &rdev->bss_list, list) { | |
473 | if (atomic_read(&bss->hold)) | |
474 | continue; | |
475 | ||
476 | if (!list_empty(&bss->hidden_list) && | |
477 | !bss->pub.hidden_beacon_bss) | |
478 | continue; | |
479 | ||
480 | if (oldest && time_before(oldest->ts, bss->ts)) | |
481 | continue; | |
482 | oldest = bss; | |
483 | } | |
484 | ||
485 | if (WARN_ON(!oldest)) | |
486 | return false; | |
487 | ||
488 | /* | |
489 | * The callers make sure to increase rdev->bss_generation if anything | |
490 | * gets removed (and a new entry added), so there's no need to also do | |
491 | * it here. | |
492 | */ | |
493 | ||
494 | ret = __cfg80211_unlink_bss(rdev, oldest); | |
495 | WARN_ON(!ret); | |
496 | return ret; | |
497 | } | |
498 | ||
c8cb5b85 TM |
499 | static u8 cfg80211_parse_bss_param(u8 data, |
500 | struct cfg80211_colocated_ap *coloc_ap) | |
501 | { | |
502 | coloc_ap->oct_recommended = | |
503 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_OCT_RECOMMENDED); | |
504 | coloc_ap->same_ssid = | |
505 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_SAME_SSID); | |
506 | coloc_ap->multi_bss = | |
507 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID); | |
508 | coloc_ap->transmitted_bssid = | |
509 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_TRANSMITTED_BSSID); | |
510 | coloc_ap->unsolicited_probe = | |
511 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_PROBE_ACTIVE); | |
512 | coloc_ap->colocated_ess = | |
513 | u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_COLOC_ESS); | |
514 | ||
515 | return u8_get_bits(data, IEEE80211_RNR_TBTT_PARAMS_COLOC_AP); | |
516 | } | |
517 | ||
518 | static int cfg80211_calc_short_ssid(const struct cfg80211_bss_ies *ies, | |
519 | const struct element **elem, u32 *s_ssid) | |
520 | { | |
521 | ||
522 | *elem = cfg80211_find_elem(WLAN_EID_SSID, ies->data, ies->len); | |
523 | if (!*elem || (*elem)->datalen > IEEE80211_MAX_SSID_LEN) | |
524 | return -EINVAL; | |
525 | ||
526 | *s_ssid = ~crc32_le(~0, (*elem)->data, (*elem)->datalen); | |
527 | return 0; | |
528 | } | |
529 | ||
45d43937 BB |
530 | VISIBLE_IF_CFG80211_KUNIT void |
531 | cfg80211_free_coloc_ap_list(struct list_head *coloc_ap_list) | |
c8cb5b85 TM |
532 | { |
533 | struct cfg80211_colocated_ap *ap, *tmp_ap; | |
534 | ||
535 | list_for_each_entry_safe(ap, tmp_ap, coloc_ap_list, list) { | |
536 | list_del(&ap->list); | |
537 | kfree(ap); | |
538 | } | |
539 | } | |
679dd27b | 540 | EXPORT_SYMBOL_IF_CFG80211_KUNIT(cfg80211_free_coloc_ap_list); |
c8cb5b85 TM |
541 | |
542 | static int cfg80211_parse_ap_info(struct cfg80211_colocated_ap *entry, | |
543 | const u8 *pos, u8 length, | |
544 | const struct element *ssid_elem, | |
dc92e54c | 545 | u32 s_ssid_tmp) |
c8cb5b85 | 546 | { |
dc92e54c | 547 | u8 bss_params; |
c8cb5b85 | 548 | |
4ef2f53e IP |
549 | entry->psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED; |
550 | ||
dc92e54c BB |
551 | /* The length is already verified by the caller to contain bss_params */ |
552 | if (length > sizeof(struct ieee80211_tbtt_info_7_8_9)) { | |
553 | struct ieee80211_tbtt_info_ge_11 *tbtt_info = (void *)pos; | |
c8cb5b85 | 554 | |
dc92e54c BB |
555 | memcpy(entry->bssid, tbtt_info->bssid, ETH_ALEN); |
556 | entry->short_ssid = le32_to_cpu(tbtt_info->short_ssid); | |
c8cb5b85 | 557 | entry->short_ssid_valid = true; |
dc92e54c BB |
558 | |
559 | bss_params = tbtt_info->bss_params; | |
a0ed5011 BB |
560 | |
561 | /* Ignore disabled links */ | |
562 | if (length >= offsetofend(typeof(*tbtt_info), mld_params)) { | |
563 | if (le16_get_bits(tbtt_info->mld_params.params, | |
564 | IEEE80211_RNR_MLD_PARAMS_DISABLED_LINK)) | |
565 | return -EINVAL; | |
566 | } | |
4ef2f53e IP |
567 | |
568 | if (length >= offsetofend(struct ieee80211_tbtt_info_ge_11, | |
569 | psd_20)) | |
570 | entry->psd_20 = tbtt_info->psd_20; | |
dc92e54c BB |
571 | } else { |
572 | struct ieee80211_tbtt_info_7_8_9 *tbtt_info = (void *)pos; | |
573 | ||
574 | memcpy(entry->bssid, tbtt_info->bssid, ETH_ALEN); | |
575 | ||
576 | bss_params = tbtt_info->bss_params; | |
4ef2f53e IP |
577 | |
578 | if (length == offsetofend(struct ieee80211_tbtt_info_7_8_9, | |
579 | psd_20)) | |
580 | entry->psd_20 = tbtt_info->psd_20; | |
c8cb5b85 TM |
581 | } |
582 | ||
dc92e54c BB |
583 | /* ignore entries with invalid BSSID */ |
584 | if (!is_valid_ether_addr(entry->bssid)) | |
585 | return -EINVAL; | |
586 | ||
c8cb5b85 | 587 | /* skip non colocated APs */ |
dc92e54c | 588 | if (!cfg80211_parse_bss_param(bss_params, entry)) |
c8cb5b85 | 589 | return -EINVAL; |
c8cb5b85 | 590 | |
dc92e54c BB |
591 | /* no information about the short ssid. Consider the entry valid |
592 | * for now. It would later be dropped in case there are explicit | |
593 | * SSIDs that need to be matched | |
594 | */ | |
595 | if (!entry->same_ssid && !entry->short_ssid_valid) | |
596 | return 0; | |
c8cb5b85 TM |
597 | |
598 | if (entry->same_ssid) { | |
599 | entry->short_ssid = s_ssid_tmp; | |
600 | entry->short_ssid_valid = true; | |
601 | ||
602 | /* | |
603 | * This is safe because we validate datalen in | |
604 | * cfg80211_parse_colocated_ap(), before calling this | |
605 | * function. | |
606 | */ | |
dc92e54c | 607 | memcpy(&entry->ssid, &ssid_elem->data, ssid_elem->datalen); |
c8cb5b85 TM |
608 | entry->ssid_len = ssid_elem->datalen; |
609 | } | |
dc92e54c | 610 | |
c8cb5b85 TM |
611 | return 0; |
612 | } | |
613 | ||
22667035 JB |
614 | bool cfg80211_iter_rnr(const u8 *elems, size_t elems_len, |
615 | enum cfg80211_rnr_iter_ret | |
616 | (*iter)(void *data, u8 type, | |
617 | const struct ieee80211_neighbor_ap_info *info, | |
618 | const u8 *tbtt_info, u8 tbtt_info_len), | |
619 | void *iter_data) | |
c8cb5b85 | 620 | { |
6b756efc | 621 | const struct element *rnr; |
c8cb5b85 | 622 | const u8 *pos, *end; |
c8cb5b85 | 623 | |
6b756efc JB |
624 | for_each_element_id(rnr, WLAN_EID_REDUCED_NEIGHBOR_REPORT, |
625 | elems, elems_len) { | |
626 | const struct ieee80211_neighbor_ap_info *info; | |
c8cb5b85 | 627 | |
6b756efc JB |
628 | pos = rnr->data; |
629 | end = rnr->data + rnr->datalen; | |
c8cb5b85 | 630 | |
5461707a | 631 | /* RNR IE may contain more than one NEIGHBOR_AP_INFO */ |
6b756efc | 632 | while (sizeof(*info) <= end - pos) { |
5461707a | 633 | u8 length, i, count; |
6b756efc | 634 | u8 type; |
c8cb5b85 | 635 | |
6b756efc JB |
636 | info = (void *)pos; |
637 | count = u8_get_bits(info->tbtt_info_hdr, | |
638 | IEEE80211_AP_INFO_TBTT_HDR_COUNT) + | |
639 | 1; | |
640 | length = info->tbtt_info_len; | |
c8cb5b85 | 641 | |
6b756efc | 642 | pos += sizeof(*info); |
c8cb5b85 | 643 | |
6b756efc JB |
644 | if (count * length > end - pos) |
645 | return false; | |
c8cb5b85 | 646 | |
6b756efc JB |
647 | type = u8_get_bits(info->tbtt_info_hdr, |
648 | IEEE80211_AP_INFO_TBTT_HDR_TYPE); | |
c8cb5b85 | 649 | |
6b756efc JB |
650 | for (i = 0; i < count; i++) { |
651 | switch (iter(iter_data, type, info, | |
652 | pos, length)) { | |
653 | case RNR_ITER_CONTINUE: | |
654 | break; | |
655 | case RNR_ITER_BREAK: | |
656 | return true; | |
657 | case RNR_ITER_ERROR: | |
658 | return false; | |
659 | } | |
03e7e493 | 660 | |
6b756efc | 661 | pos += length; |
5461707a | 662 | } |
6b756efc | 663 | } |
5461707a | 664 | |
6b756efc JB |
665 | if (pos != end) |
666 | return false; | |
667 | } | |
c8cb5b85 | 668 | |
6b756efc JB |
669 | return true; |
670 | } | |
22667035 | 671 | EXPORT_SYMBOL_GPL(cfg80211_iter_rnr); |
6b756efc JB |
672 | |
673 | struct colocated_ap_data { | |
674 | const struct element *ssid_elem; | |
675 | struct list_head ap_list; | |
676 | u32 s_ssid_tmp; | |
677 | int n_coloc; | |
678 | }; | |
c8cb5b85 | 679 | |
6b756efc JB |
680 | static enum cfg80211_rnr_iter_ret |
681 | cfg80211_parse_colocated_ap_iter(void *_data, u8 type, | |
682 | const struct ieee80211_neighbor_ap_info *info, | |
683 | const u8 *tbtt_info, u8 tbtt_info_len) | |
684 | { | |
685 | struct colocated_ap_data *data = _data; | |
686 | struct cfg80211_colocated_ap *entry; | |
687 | enum nl80211_band band; | |
c8cb5b85 | 688 | |
6b756efc JB |
689 | if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) |
690 | return RNR_ITER_CONTINUE; | |
c8cb5b85 | 691 | |
6b756efc JB |
692 | if (!ieee80211_operating_class_to_band(info->op_class, &band)) |
693 | return RNR_ITER_CONTINUE; | |
c8cb5b85 | 694 | |
6b756efc JB |
695 | /* TBTT info must include bss param + BSSID + (short SSID or |
696 | * same_ssid bit to be set). Ignore other options, and move to | |
697 | * the next AP info | |
698 | */ | |
699 | if (band != NL80211_BAND_6GHZ || | |
700 | !(tbtt_info_len == offsetofend(struct ieee80211_tbtt_info_7_8_9, | |
701 | bss_params) || | |
702 | tbtt_info_len == sizeof(struct ieee80211_tbtt_info_7_8_9) || | |
703 | tbtt_info_len >= offsetofend(struct ieee80211_tbtt_info_ge_11, | |
704 | bss_params))) | |
705 | return RNR_ITER_CONTINUE; | |
706 | ||
707 | entry = kzalloc(sizeof(*entry) + IEEE80211_MAX_SSID_LEN, GFP_ATOMIC); | |
708 | if (!entry) | |
709 | return RNR_ITER_ERROR; | |
710 | ||
711 | entry->center_freq = | |
712 | ieee80211_channel_to_frequency(info->channel, band); | |
713 | ||
714 | if (!cfg80211_parse_ap_info(entry, tbtt_info, tbtt_info_len, | |
715 | data->ssid_elem, data->s_ssid_tmp)) { | |
716 | data->n_coloc++; | |
717 | list_add_tail(&entry->list, &data->ap_list); | |
718 | } else { | |
719 | kfree(entry); | |
720 | } | |
c8cb5b85 | 721 | |
6b756efc JB |
722 | return RNR_ITER_CONTINUE; |
723 | } | |
c8cb5b85 | 724 | |
6b756efc JB |
725 | VISIBLE_IF_CFG80211_KUNIT int |
726 | cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies, | |
727 | struct list_head *list) | |
728 | { | |
729 | struct colocated_ap_data data = {}; | |
730 | int ret; | |
731 | ||
732 | INIT_LIST_HEAD(&data.ap_list); | |
733 | ||
734 | ret = cfg80211_calc_short_ssid(ies, &data.ssid_elem, &data.s_ssid_tmp); | |
735 | if (ret) | |
736 | return 0; | |
737 | ||
738 | if (!cfg80211_iter_rnr(ies->data, ies->len, | |
739 | cfg80211_parse_colocated_ap_iter, &data)) { | |
740 | cfg80211_free_coloc_ap_list(&data.ap_list); | |
741 | return 0; | |
c8cb5b85 TM |
742 | } |
743 | ||
6b756efc JB |
744 | list_splice_tail(&data.ap_list, list); |
745 | return data.n_coloc; | |
c8cb5b85 | 746 | } |
679dd27b | 747 | EXPORT_SYMBOL_IF_CFG80211_KUNIT(cfg80211_parse_colocated_ap); |
c8cb5b85 TM |
748 | |
749 | static void cfg80211_scan_req_add_chan(struct cfg80211_scan_request *request, | |
750 | struct ieee80211_channel *chan, | |
751 | bool add_to_6ghz) | |
752 | { | |
753 | int i; | |
754 | u32 n_channels = request->n_channels; | |
755 | struct cfg80211_scan_6ghz_params *params = | |
756 | &request->scan_6ghz_params[request->n_6ghz_params]; | |
757 | ||
758 | for (i = 0; i < n_channels; i++) { | |
759 | if (request->channels[i] == chan) { | |
760 | if (add_to_6ghz) | |
761 | params->channel_idx = i; | |
762 | return; | |
763 | } | |
764 | } | |
765 | ||
766 | request->channels[n_channels] = chan; | |
767 | if (add_to_6ghz) | |
768 | request->scan_6ghz_params[request->n_6ghz_params].channel_idx = | |
769 | n_channels; | |
770 | ||
771 | request->n_channels++; | |
772 | } | |
773 | ||
774 | static bool cfg80211_find_ssid_match(struct cfg80211_colocated_ap *ap, | |
775 | struct cfg80211_scan_request *request) | |
776 | { | |
ba5c2523 | 777 | int i; |
c8cb5b85 TM |
778 | u32 s_ssid; |
779 | ||
780 | for (i = 0; i < request->n_ssids; i++) { | |
781 | /* wildcard ssid in the scan request */ | |
5666ee15 AS |
782 | if (!request->ssids[i].ssid_len) { |
783 | if (ap->multi_bss && !ap->transmitted_bssid) | |
784 | continue; | |
785 | ||
c8cb5b85 | 786 | return true; |
5666ee15 | 787 | } |
c8cb5b85 TM |
788 | |
789 | if (ap->ssid_len && | |
790 | ap->ssid_len == request->ssids[i].ssid_len) { | |
791 | if (!memcmp(request->ssids[i].ssid, ap->ssid, | |
792 | ap->ssid_len)) | |
793 | return true; | |
794 | } else if (ap->short_ssid_valid) { | |
795 | s_ssid = ~crc32_le(~0, request->ssids[i].ssid, | |
796 | request->ssids[i].ssid_len); | |
797 | ||
798 | if (ap->short_ssid == s_ssid) | |
799 | return true; | |
800 | } | |
801 | } | |
802 | ||
803 | return false; | |
804 | } | |
805 | ||
806 | static int cfg80211_scan_6ghz(struct cfg80211_registered_device *rdev) | |
807 | { | |
808 | u8 i; | |
809 | struct cfg80211_colocated_ap *ap; | |
810 | int n_channels, count = 0, err; | |
811 | struct cfg80211_scan_request *request, *rdev_req = rdev->scan_req; | |
812 | LIST_HEAD(coloc_ap_list); | |
d590a125 | 813 | bool need_scan_psc = true; |
c8cb5b85 | 814 | const struct ieee80211_sband_iftype_data *iftd; |
f7a8b10b | 815 | size_t size, offs_ssids, offs_6ghz_params, offs_ies; |
c8cb5b85 TM |
816 | |
817 | rdev_req->scan_6ghz = true; | |
818 | ||
819 | if (!rdev->wiphy.bands[NL80211_BAND_6GHZ]) | |
820 | return -EOPNOTSUPP; | |
821 | ||
822 | iftd = ieee80211_get_sband_iftype_data(rdev->wiphy.bands[NL80211_BAND_6GHZ], | |
823 | rdev_req->wdev->iftype); | |
824 | if (!iftd || !iftd->he_cap.has_he) | |
825 | return -EOPNOTSUPP; | |
826 | ||
827 | n_channels = rdev->wiphy.bands[NL80211_BAND_6GHZ]->n_channels; | |
828 | ||
829 | if (rdev_req->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ) { | |
830 | struct cfg80211_internal_bss *intbss; | |
831 | ||
832 | spin_lock_bh(&rdev->bss_lock); | |
833 | list_for_each_entry(intbss, &rdev->bss_list, list) { | |
834 | struct cfg80211_bss *res = &intbss->pub; | |
835 | const struct cfg80211_bss_ies *ies; | |
0fca7784 IP |
836 | const struct element *ssid_elem; |
837 | struct cfg80211_colocated_ap *entry; | |
838 | u32 s_ssid_tmp; | |
839 | int ret; | |
c8cb5b85 TM |
840 | |
841 | ies = rcu_access_pointer(res->ies); | |
842 | count += cfg80211_parse_colocated_ap(ies, | |
843 | &coloc_ap_list); | |
0fca7784 IP |
844 | |
845 | /* In case the scan request specified a specific BSSID | |
846 | * and the BSS is found and operating on 6GHz band then | |
847 | * add this AP to the collocated APs list. | |
848 | * This is relevant for ML probe requests when the lower | |
849 | * band APs have not been discovered. | |
850 | */ | |
851 | if (is_broadcast_ether_addr(rdev_req->bssid) || | |
852 | !ether_addr_equal(rdev_req->bssid, res->bssid) || | |
853 | res->channel->band != NL80211_BAND_6GHZ) | |
854 | continue; | |
855 | ||
856 | ret = cfg80211_calc_short_ssid(ies, &ssid_elem, | |
857 | &s_ssid_tmp); | |
858 | if (ret) | |
859 | continue; | |
860 | ||
861 | entry = kzalloc(sizeof(*entry) + IEEE80211_MAX_SSID_LEN, | |
862 | GFP_ATOMIC); | |
863 | ||
864 | if (!entry) | |
865 | continue; | |
866 | ||
867 | memcpy(entry->bssid, res->bssid, ETH_ALEN); | |
868 | entry->short_ssid = s_ssid_tmp; | |
869 | memcpy(entry->ssid, ssid_elem->data, | |
870 | ssid_elem->datalen); | |
871 | entry->ssid_len = ssid_elem->datalen; | |
872 | entry->short_ssid_valid = true; | |
873 | entry->center_freq = res->channel->center_freq; | |
874 | ||
875 | list_add_tail(&entry->list, &coloc_ap_list); | |
876 | count++; | |
c8cb5b85 TM |
877 | } |
878 | spin_unlock_bh(&rdev->bss_lock); | |
879 | } | |
880 | ||
f7a8b10b JB |
881 | size = struct_size(request, channels, n_channels); |
882 | offs_ssids = size; | |
883 | size += sizeof(*request->ssids) * rdev_req->n_ssids; | |
884 | offs_6ghz_params = size; | |
885 | size += sizeof(*request->scan_6ghz_params) * count; | |
886 | offs_ies = size; | |
887 | size += rdev_req->ie_len; | |
888 | ||
889 | request = kzalloc(size, GFP_KERNEL); | |
c8cb5b85 TM |
890 | if (!request) { |
891 | cfg80211_free_coloc_ap_list(&coloc_ap_list); | |
892 | return -ENOMEM; | |
893 | } | |
894 | ||
895 | *request = *rdev_req; | |
896 | request->n_channels = 0; | |
f7a8b10b JB |
897 | request->n_6ghz_params = 0; |
898 | if (rdev_req->n_ssids) { | |
899 | /* | |
900 | * Add the ssids from the parent scan request to the new | |
901 | * scan request, so the driver would be able to use them | |
902 | * in its probe requests to discover hidden APs on PSC | |
903 | * channels. | |
904 | */ | |
905 | request->ssids = (void *)request + offs_ssids; | |
906 | memcpy(request->ssids, rdev_req->ssids, | |
907 | sizeof(*request->ssids) * request->n_ssids); | |
908 | } | |
909 | request->scan_6ghz_params = (void *)request + offs_6ghz_params; | |
910 | ||
911 | if (rdev_req->ie_len) { | |
912 | void *ie = (void *)request + offs_ies; | |
913 | ||
914 | memcpy(ie, rdev_req->ie, rdev_req->ie_len); | |
915 | request->ie = ie; | |
916 | } | |
c8cb5b85 TM |
917 | |
918 | /* | |
d590a125 AB |
919 | * PSC channels should not be scanned in case of direct scan with 1 SSID |
920 | * and at least one of the reported co-located APs with same SSID | |
921 | * indicating that all APs in the same ESS are co-located | |
c8cb5b85 | 922 | */ |
d590a125 | 923 | if (count && request->n_ssids == 1 && request->ssids[0].ssid_len) { |
c8cb5b85 | 924 | list_for_each_entry(ap, &coloc_ap_list, list) { |
d590a125 AB |
925 | if (ap->colocated_ess && |
926 | cfg80211_find_ssid_match(ap, request)) { | |
927 | need_scan_psc = false; | |
c8cb5b85 TM |
928 | break; |
929 | } | |
930 | } | |
c8cb5b85 TM |
931 | } |
932 | ||
933 | /* | |
934 | * add to the scan request the channels that need to be scanned | |
935 | * regardless of the collocated APs (PSC channels or all channels | |
936 | * in case that NL80211_SCAN_FLAG_COLOCATED_6GHZ is not set) | |
937 | */ | |
938 | for (i = 0; i < rdev_req->n_channels; i++) { | |
939 | if (rdev_req->channels[i]->band == NL80211_BAND_6GHZ && | |
940 | ((need_scan_psc && | |
941 | cfg80211_channel_is_psc(rdev_req->channels[i])) || | |
942 | !(rdev_req->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ))) { | |
943 | cfg80211_scan_req_add_chan(request, | |
944 | rdev_req->channels[i], | |
945 | false); | |
946 | } | |
947 | } | |
948 | ||
949 | if (!(rdev_req->flags & NL80211_SCAN_FLAG_COLOCATED_6GHZ)) | |
950 | goto skip; | |
951 | ||
952 | list_for_each_entry(ap, &coloc_ap_list, list) { | |
953 | bool found = false; | |
954 | struct cfg80211_scan_6ghz_params *scan_6ghz_params = | |
955 | &request->scan_6ghz_params[request->n_6ghz_params]; | |
956 | struct ieee80211_channel *chan = | |
957 | ieee80211_get_channel(&rdev->wiphy, ap->center_freq); | |
958 | ||
959 | if (!chan || chan->flags & IEEE80211_CHAN_DISABLED) | |
960 | continue; | |
961 | ||
962 | for (i = 0; i < rdev_req->n_channels; i++) { | |
963 | if (rdev_req->channels[i] == chan) | |
964 | found = true; | |
965 | } | |
966 | ||
967 | if (!found) | |
968 | continue; | |
969 | ||
970 | if (request->n_ssids > 0 && | |
971 | !cfg80211_find_ssid_match(ap, request)) | |
972 | continue; | |
973 | ||
0914468a IP |
974 | if (!is_broadcast_ether_addr(request->bssid) && |
975 | !ether_addr_equal(request->bssid, ap->bssid)) | |
976 | continue; | |
977 | ||
5666ee15 AS |
978 | if (!request->n_ssids && ap->multi_bss && !ap->transmitted_bssid) |
979 | continue; | |
980 | ||
c8cb5b85 TM |
981 | cfg80211_scan_req_add_chan(request, chan, true); |
982 | memcpy(scan_6ghz_params->bssid, ap->bssid, ETH_ALEN); | |
983 | scan_6ghz_params->short_ssid = ap->short_ssid; | |
984 | scan_6ghz_params->short_ssid_valid = ap->short_ssid_valid; | |
985 | scan_6ghz_params->unsolicited_probe = ap->unsolicited_probe; | |
4ef2f53e | 986 | scan_6ghz_params->psd_20 = ap->psd_20; |
c8cb5b85 TM |
987 | |
988 | /* | |
989 | * If a PSC channel is added to the scan and 'need_scan_psc' is | |
990 | * set to false, then all the APs that the scan logic is | |
991 | * interested with on the channel are collocated and thus there | |
992 | * is no need to perform the initial PSC channel listen. | |
993 | */ | |
994 | if (cfg80211_channel_is_psc(chan) && !need_scan_psc) | |
995 | scan_6ghz_params->psc_no_listen = true; | |
996 | ||
997 | request->n_6ghz_params++; | |
998 | } | |
999 | ||
1000 | skip: | |
1001 | cfg80211_free_coloc_ap_list(&coloc_ap_list); | |
1002 | ||
1003 | if (request->n_channels) { | |
1004 | struct cfg80211_scan_request *old = rdev->int_scan_req; | |
c8cb5b85 | 1005 | |
f7a8b10b | 1006 | rdev->int_scan_req = request; |
52bb2052 | 1007 | |
c8cb5b85 TM |
1008 | /* |
1009 | * If this scan follows a previous scan, save the scan start | |
1010 | * info from the first part of the scan | |
1011 | */ | |
1012 | if (old) | |
1013 | rdev->int_scan_req->info = old->info; | |
1014 | ||
1015 | err = rdev_scan(rdev, request); | |
1016 | if (err) { | |
1017 | rdev->int_scan_req = old; | |
1018 | kfree(request); | |
1019 | } else { | |
1020 | kfree(old); | |
1021 | } | |
1022 | ||
1023 | return err; | |
1024 | } | |
1025 | ||
1026 | kfree(request); | |
1027 | return -EINVAL; | |
1028 | } | |
1029 | ||
1030 | int cfg80211_scan(struct cfg80211_registered_device *rdev) | |
1031 | { | |
1032 | struct cfg80211_scan_request *request; | |
1033 | struct cfg80211_scan_request *rdev_req = rdev->scan_req; | |
1034 | u32 n_channels = 0, idx, i; | |
1035 | ||
1036 | if (!(rdev->wiphy.flags & WIPHY_FLAG_SPLIT_SCAN_6GHZ)) | |
1037 | return rdev_scan(rdev, rdev_req); | |
1038 | ||
1039 | for (i = 0; i < rdev_req->n_channels; i++) { | |
1040 | if (rdev_req->channels[i]->band != NL80211_BAND_6GHZ) | |
1041 | n_channels++; | |
1042 | } | |
1043 | ||
1044 | if (!n_channels) | |
1045 | return cfg80211_scan_6ghz(rdev); | |
1046 | ||
1047 | request = kzalloc(struct_size(request, channels, n_channels), | |
1048 | GFP_KERNEL); | |
1049 | if (!request) | |
1050 | return -ENOMEM; | |
1051 | ||
1052 | *request = *rdev_req; | |
1053 | request->n_channels = n_channels; | |
1054 | ||
1055 | for (i = idx = 0; i < rdev_req->n_channels; i++) { | |
1056 | if (rdev_req->channels[i]->band != NL80211_BAND_6GHZ) | |
1057 | request->channels[idx++] = rdev_req->channels[i]; | |
1058 | } | |
1059 | ||
1060 | rdev_req->scan_6ghz = false; | |
1061 | rdev->int_scan_req = request; | |
1062 | return rdev_scan(rdev, request); | |
1063 | } | |
1064 | ||
f9d15d16 JB |
1065 | void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, |
1066 | bool send_message) | |
2a519311 | 1067 | { |
c8cb5b85 | 1068 | struct cfg80211_scan_request *request, *rdev_req; |
fd014284 | 1069 | struct wireless_dev *wdev; |
f9d15d16 | 1070 | struct sk_buff *msg; |
3d23e349 | 1071 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
1072 | union iwreq_data wrqu; |
1073 | #endif | |
1074 | ||
a05829a7 | 1075 | lockdep_assert_held(&rdev->wiphy.mtx); |
01a0ac41 | 1076 | |
f9d15d16 | 1077 | if (rdev->scan_msg) { |
505a2e88 | 1078 | nl80211_send_scan_msg(rdev, rdev->scan_msg); |
f9d15d16 JB |
1079 | rdev->scan_msg = NULL; |
1080 | return; | |
1081 | } | |
667503dd | 1082 | |
c8cb5b85 TM |
1083 | rdev_req = rdev->scan_req; |
1084 | if (!rdev_req) | |
01a0ac41 JB |
1085 | return; |
1086 | ||
c8cb5b85 TM |
1087 | wdev = rdev_req->wdev; |
1088 | request = rdev->int_scan_req ? rdev->int_scan_req : rdev_req; | |
1089 | ||
1090 | if (wdev_running(wdev) && | |
1091 | (rdev->wiphy.flags & WIPHY_FLAG_SPLIT_SCAN_6GHZ) && | |
1092 | !rdev_req->scan_6ghz && !request->info.aborted && | |
1093 | !cfg80211_scan_6ghz(rdev)) | |
1094 | return; | |
2a519311 | 1095 | |
6829c878 JB |
1096 | /* |
1097 | * This must be before sending the other events! | |
1098 | * Otherwise, wpa_supplicant gets completely confused with | |
1099 | * wext events. | |
1100 | */ | |
fd014284 JB |
1101 | if (wdev->netdev) |
1102 | cfg80211_sme_scan_done(wdev->netdev); | |
6829c878 | 1103 | |
1d76250b | 1104 | if (!request->info.aborted && |
f9d15d16 JB |
1105 | request->flags & NL80211_SCAN_FLAG_FLUSH) { |
1106 | /* flush entries from previous scans */ | |
1107 | spin_lock_bh(&rdev->bss_lock); | |
1108 | __cfg80211_bss_expire(rdev, request->scan_start); | |
1109 | spin_unlock_bh(&rdev->bss_lock); | |
15d6030b | 1110 | } |
2a519311 | 1111 | |
1d76250b | 1112 | msg = nl80211_build_scan_msg(rdev, wdev, request->info.aborted); |
f9d15d16 | 1113 | |
3d23e349 | 1114 | #ifdef CONFIG_CFG80211_WEXT |
1d76250b | 1115 | if (wdev->netdev && !request->info.aborted) { |
2a519311 JB |
1116 | memset(&wrqu, 0, sizeof(wrqu)); |
1117 | ||
fd014284 | 1118 | wireless_send_event(wdev->netdev, SIOCGIWSCAN, &wrqu, NULL); |
2a519311 JB |
1119 | } |
1120 | #endif | |
1121 | ||
1160dfa1 | 1122 | dev_put(wdev->netdev); |
2a519311 | 1123 | |
c8cb5b85 TM |
1124 | kfree(rdev->int_scan_req); |
1125 | rdev->int_scan_req = NULL; | |
1126 | ||
1127 | kfree(rdev->scan_req); | |
36e6fea8 | 1128 | rdev->scan_req = NULL; |
f9d15d16 JB |
1129 | |
1130 | if (!send_message) | |
1131 | rdev->scan_msg = msg; | |
1132 | else | |
505a2e88 | 1133 | nl80211_send_scan_msg(rdev, msg); |
2a519311 | 1134 | } |
667503dd | 1135 | |
fe0af9fe | 1136 | void __cfg80211_scan_done(struct wiphy *wiphy, struct wiphy_work *wk) |
36e6fea8 | 1137 | { |
fe0af9fe | 1138 | ___cfg80211_scan_done(wiphy_to_rdev(wiphy), true); |
36e6fea8 JB |
1139 | } |
1140 | ||
1d76250b AS |
1141 | void cfg80211_scan_done(struct cfg80211_scan_request *request, |
1142 | struct cfg80211_scan_info *info) | |
667503dd | 1143 | { |
c8cb5b85 TM |
1144 | struct cfg80211_scan_info old_info = request->info; |
1145 | ||
1d76250b | 1146 | trace_cfg80211_scan_done(request, info); |
c8cb5b85 TM |
1147 | WARN_ON(request != wiphy_to_rdev(request->wiphy)->scan_req && |
1148 | request != wiphy_to_rdev(request->wiphy)->int_scan_req); | |
667503dd | 1149 | |
1d76250b | 1150 | request->info = *info; |
c8cb5b85 TM |
1151 | |
1152 | /* | |
1153 | * In case the scan is split, the scan_start_tsf and tsf_bssid should | |
1154 | * be of the first part. In such a case old_info.scan_start_tsf should | |
1155 | * be non zero. | |
1156 | */ | |
1157 | if (request->scan_6ghz && old_info.scan_start_tsf) { | |
1158 | request->info.scan_start_tsf = old_info.scan_start_tsf; | |
1159 | memcpy(request->info.tsf_bssid, old_info.tsf_bssid, | |
1160 | sizeof(request->info.tsf_bssid)); | |
1161 | } | |
1162 | ||
5fe231e8 | 1163 | request->notified = true; |
fe0af9fe JB |
1164 | wiphy_work_queue(request->wiphy, |
1165 | &wiphy_to_rdev(request->wiphy)->scan_done_wk); | |
667503dd | 1166 | } |
2a519311 JB |
1167 | EXPORT_SYMBOL(cfg80211_scan_done); |
1168 | ||
ca986ad9 AVS |
1169 | void cfg80211_add_sched_scan_req(struct cfg80211_registered_device *rdev, |
1170 | struct cfg80211_sched_scan_request *req) | |
1171 | { | |
a05829a7 | 1172 | lockdep_assert_held(&rdev->wiphy.mtx); |
ca986ad9 AVS |
1173 | |
1174 | list_add_rcu(&req->list, &rdev->sched_scan_req_list); | |
1175 | } | |
1176 | ||
1177 | static void cfg80211_del_sched_scan_req(struct cfg80211_registered_device *rdev, | |
1178 | struct cfg80211_sched_scan_request *req) | |
1179 | { | |
a05829a7 | 1180 | lockdep_assert_held(&rdev->wiphy.mtx); |
ca986ad9 AVS |
1181 | |
1182 | list_del_rcu(&req->list); | |
1183 | kfree_rcu(req, rcu_head); | |
1184 | } | |
1185 | ||
1186 | static struct cfg80211_sched_scan_request * | |
1187 | cfg80211_find_sched_scan_req(struct cfg80211_registered_device *rdev, u64 reqid) | |
1188 | { | |
1189 | struct cfg80211_sched_scan_request *pos; | |
1190 | ||
3ee9306b | 1191 | list_for_each_entry_rcu(pos, &rdev->sched_scan_req_list, list, |
a05829a7 | 1192 | lockdep_is_held(&rdev->wiphy.mtx)) { |
ca986ad9 AVS |
1193 | if (pos->reqid == reqid) |
1194 | return pos; | |
1195 | } | |
b34939b9 | 1196 | return NULL; |
ca986ad9 AVS |
1197 | } |
1198 | ||
1199 | /* | |
1200 | * Determines if a scheduled scan request can be handled. When a legacy | |
1201 | * scheduled scan is running no other scheduled scan is allowed regardless | |
1202 | * whether the request is for legacy or multi-support scan. When a multi-support | |
1203 | * scheduled scan is running a request for legacy scan is not allowed. In this | |
1204 | * case a request for multi-support scan can be handled if resources are | |
1205 | * available, ie. struct wiphy::max_sched_scan_reqs limit is not yet reached. | |
1206 | */ | |
1207 | int cfg80211_sched_scan_req_possible(struct cfg80211_registered_device *rdev, | |
1208 | bool want_multi) | |
1209 | { | |
1210 | struct cfg80211_sched_scan_request *pos; | |
1211 | int i = 0; | |
1212 | ||
1213 | list_for_each_entry(pos, &rdev->sched_scan_req_list, list) { | |
1214 | /* request id zero means legacy in progress */ | |
1215 | if (!i && !pos->reqid) | |
1216 | return -EINPROGRESS; | |
1217 | i++; | |
1218 | } | |
1219 | ||
1220 | if (i) { | |
1221 | /* no legacy allowed when multi request(s) are active */ | |
1222 | if (!want_multi) | |
1223 | return -EINPROGRESS; | |
1224 | ||
1225 | /* resource limit reached */ | |
1226 | if (i == rdev->wiphy.max_sched_scan_reqs) | |
1227 | return -ENOSPC; | |
1228 | } | |
1229 | return 0; | |
1230 | } | |
1231 | ||
b34939b9 | 1232 | void cfg80211_sched_scan_results_wk(struct work_struct *work) |
807f8a8c LC |
1233 | { |
1234 | struct cfg80211_registered_device *rdev; | |
b34939b9 | 1235 | struct cfg80211_sched_scan_request *req, *tmp; |
807f8a8c | 1236 | |
b34939b9 AVS |
1237 | rdev = container_of(work, struct cfg80211_registered_device, |
1238 | sched_scan_res_wk); | |
807f8a8c | 1239 | |
a05829a7 | 1240 | wiphy_lock(&rdev->wiphy); |
b34939b9 AVS |
1241 | list_for_each_entry_safe(req, tmp, &rdev->sched_scan_req_list, list) { |
1242 | if (req->report_results) { | |
1243 | req->report_results = false; | |
1244 | if (req->flags & NL80211_SCAN_FLAG_FLUSH) { | |
1245 | /* flush entries from previous scans */ | |
1246 | spin_lock_bh(&rdev->bss_lock); | |
1247 | __cfg80211_bss_expire(rdev, req->scan_start); | |
1248 | spin_unlock_bh(&rdev->bss_lock); | |
1249 | req->scan_start = jiffies; | |
1250 | } | |
1251 | nl80211_send_sched_scan(req, | |
1252 | NL80211_CMD_SCHED_SCAN_RESULTS); | |
15d6030b | 1253 | } |
15d6030b | 1254 | } |
a05829a7 | 1255 | wiphy_unlock(&rdev->wiphy); |
807f8a8c LC |
1256 | } |
1257 | ||
b34939b9 | 1258 | void cfg80211_sched_scan_results(struct wiphy *wiphy, u64 reqid) |
807f8a8c | 1259 | { |
ca986ad9 AVS |
1260 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
1261 | struct cfg80211_sched_scan_request *request; | |
1262 | ||
b34939b9 | 1263 | trace_cfg80211_sched_scan_results(wiphy, reqid); |
807f8a8c | 1264 | /* ignore if we're not scanning */ |
31a60ed1 | 1265 | |
1b57b621 | 1266 | rcu_read_lock(); |
b34939b9 AVS |
1267 | request = cfg80211_find_sched_scan_req(rdev, reqid); |
1268 | if (request) { | |
1269 | request->report_results = true; | |
1270 | queue_work(cfg80211_wq, &rdev->sched_scan_res_wk); | |
1271 | } | |
1b57b621 | 1272 | rcu_read_unlock(); |
807f8a8c LC |
1273 | } |
1274 | EXPORT_SYMBOL(cfg80211_sched_scan_results); | |
1275 | ||
a05829a7 | 1276 | void cfg80211_sched_scan_stopped_locked(struct wiphy *wiphy, u64 reqid) |
807f8a8c | 1277 | { |
f26cbf40 | 1278 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
807f8a8c | 1279 | |
a05829a7 | 1280 | lockdep_assert_held(&wiphy->mtx); |
792e6aa7 | 1281 | |
b34939b9 | 1282 | trace_cfg80211_sched_scan_stopped(wiphy, reqid); |
4ee3e063 | 1283 | |
b34939b9 | 1284 | __cfg80211_stop_sched_scan(rdev, reqid, true); |
792e6aa7 | 1285 | } |
a05829a7 | 1286 | EXPORT_SYMBOL(cfg80211_sched_scan_stopped_locked); |
792e6aa7 | 1287 | |
b34939b9 | 1288 | void cfg80211_sched_scan_stopped(struct wiphy *wiphy, u64 reqid) |
792e6aa7 | 1289 | { |
a05829a7 JB |
1290 | wiphy_lock(wiphy); |
1291 | cfg80211_sched_scan_stopped_locked(wiphy, reqid); | |
1292 | wiphy_unlock(wiphy); | |
807f8a8c | 1293 | } |
807f8a8c LC |
1294 | EXPORT_SYMBOL(cfg80211_sched_scan_stopped); |
1295 | ||
ca986ad9 AVS |
1296 | int cfg80211_stop_sched_scan_req(struct cfg80211_registered_device *rdev, |
1297 | struct cfg80211_sched_scan_request *req, | |
1298 | bool driver_initiated) | |
807f8a8c | 1299 | { |
a05829a7 | 1300 | lockdep_assert_held(&rdev->wiphy.mtx); |
807f8a8c | 1301 | |
85a9994a | 1302 | if (!driver_initiated) { |
3a3ecf1d | 1303 | int err = rdev_sched_scan_stop(rdev, req->dev, req->reqid); |
85a9994a LC |
1304 | if (err) |
1305 | return err; | |
1306 | } | |
807f8a8c | 1307 | |
ca986ad9 | 1308 | nl80211_send_sched_scan(req, NL80211_CMD_SCHED_SCAN_STOPPED); |
807f8a8c | 1309 | |
ca986ad9 | 1310 | cfg80211_del_sched_scan_req(rdev, req); |
807f8a8c | 1311 | |
3b4670ff | 1312 | return 0; |
807f8a8c LC |
1313 | } |
1314 | ||
ca986ad9 AVS |
1315 | int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, |
1316 | u64 reqid, bool driver_initiated) | |
1317 | { | |
1318 | struct cfg80211_sched_scan_request *sched_scan_req; | |
1319 | ||
a05829a7 | 1320 | lockdep_assert_held(&rdev->wiphy.mtx); |
ca986ad9 AVS |
1321 | |
1322 | sched_scan_req = cfg80211_find_sched_scan_req(rdev, reqid); | |
b34939b9 AVS |
1323 | if (!sched_scan_req) |
1324 | return -ENOENT; | |
ca986ad9 AVS |
1325 | |
1326 | return cfg80211_stop_sched_scan_req(rdev, sched_scan_req, | |
1327 | driver_initiated); | |
1328 | } | |
1329 | ||
1b8ec87a | 1330 | void cfg80211_bss_age(struct cfg80211_registered_device *rdev, |
cb3a8eec DW |
1331 | unsigned long age_secs) |
1332 | { | |
1333 | struct cfg80211_internal_bss *bss; | |
1334 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
1335 | ||
1b8ec87a ZG |
1336 | spin_lock_bh(&rdev->bss_lock); |
1337 | list_for_each_entry(bss, &rdev->bss_list, list) | |
cb3a8eec | 1338 | bss->ts -= age_jiffies; |
1b8ec87a | 1339 | spin_unlock_bh(&rdev->bss_lock); |
cb3a8eec DW |
1340 | } |
1341 | ||
1b8ec87a | 1342 | void cfg80211_bss_expire(struct cfg80211_registered_device *rdev) |
2a519311 | 1343 | { |
1b8ec87a | 1344 | __cfg80211_bss_expire(rdev, jiffies - IEEE80211_SCAN_RESULT_EXPIRE); |
2a519311 JB |
1345 | } |
1346 | ||
2f1805ea EG |
1347 | void cfg80211_bss_flush(struct wiphy *wiphy) |
1348 | { | |
1349 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
1350 | ||
1351 | spin_lock_bh(&rdev->bss_lock); | |
1352 | __cfg80211_bss_expire(rdev, jiffies); | |
1353 | spin_unlock_bh(&rdev->bss_lock); | |
1354 | } | |
1355 | EXPORT_SYMBOL(cfg80211_bss_flush); | |
1356 | ||
49a68e0d JB |
1357 | const struct element * |
1358 | cfg80211_find_elem_match(u8 eid, const u8 *ies, unsigned int len, | |
1359 | const u8 *match, unsigned int match_len, | |
1360 | unsigned int match_offset) | |
2a519311 | 1361 | { |
0f3b07f0 JB |
1362 | const struct element *elem; |
1363 | ||
0f3b07f0 | 1364 | for_each_element_id(elem, eid, ies, len) { |
49a68e0d JB |
1365 | if (elem->datalen >= match_offset + match_len && |
1366 | !memcmp(elem->data + match_offset, match, match_len)) | |
1367 | return elem; | |
2a519311 | 1368 | } |
fbd05e4a LC |
1369 | |
1370 | return NULL; | |
2a519311 | 1371 | } |
49a68e0d | 1372 | EXPORT_SYMBOL(cfg80211_find_elem_match); |
2a519311 | 1373 | |
49a68e0d JB |
1374 | const struct element *cfg80211_find_vendor_elem(unsigned int oui, int oui_type, |
1375 | const u8 *ies, | |
1376 | unsigned int len) | |
0c28ec58 | 1377 | { |
49a68e0d | 1378 | const struct element *elem; |
fbd05e4a LC |
1379 | u8 match[] = { oui >> 16, oui >> 8, oui, oui_type }; |
1380 | int match_len = (oui_type < 0) ? 3 : sizeof(match); | |
0c28ec58 | 1381 | |
9e9ea439 EG |
1382 | if (WARN_ON(oui_type > 0xff)) |
1383 | return NULL; | |
1384 | ||
49a68e0d JB |
1385 | elem = cfg80211_find_elem_match(WLAN_EID_VENDOR_SPECIFIC, ies, len, |
1386 | match, match_len, 0); | |
6719429d | 1387 | |
49a68e0d | 1388 | if (!elem || elem->datalen < 4) |
fbd05e4a | 1389 | return NULL; |
6719429d | 1390 | |
49a68e0d | 1391 | return elem; |
0c28ec58 | 1392 | } |
49a68e0d | 1393 | EXPORT_SYMBOL(cfg80211_find_vendor_elem); |
0c28ec58 | 1394 | |
4593c4cb JB |
1395 | /** |
1396 | * enum bss_compare_mode - BSS compare mode | |
1397 | * @BSS_CMP_REGULAR: regular compare mode (for insertion and normal find) | |
1398 | * @BSS_CMP_HIDE_ZLEN: find hidden SSID with zero-length mode | |
1399 | * @BSS_CMP_HIDE_NUL: find hidden SSID with NUL-ed out mode | |
1400 | */ | |
1401 | enum bss_compare_mode { | |
1402 | BSS_CMP_REGULAR, | |
1403 | BSS_CMP_HIDE_ZLEN, | |
1404 | BSS_CMP_HIDE_NUL, | |
1405 | }; | |
1406 | ||
dd9dfb9f | 1407 | static int cmp_bss(struct cfg80211_bss *a, |
5622f5bb | 1408 | struct cfg80211_bss *b, |
4593c4cb | 1409 | enum bss_compare_mode mode) |
dd9dfb9f | 1410 | { |
9caf0364 | 1411 | const struct cfg80211_bss_ies *a_ies, *b_ies; |
3af6341c JB |
1412 | const u8 *ie1 = NULL; |
1413 | const u8 *ie2 = NULL; | |
5622f5bb | 1414 | int i, r; |
dd9dfb9f | 1415 | |
3af6341c | 1416 | if (a->channel != b->channel) |
c1d3214d JKS |
1417 | return (b->channel->center_freq * 1000 + b->channel->freq_offset) - |
1418 | (a->channel->center_freq * 1000 + a->channel->freq_offset); | |
dd9dfb9f | 1419 | |
9caf0364 JB |
1420 | a_ies = rcu_access_pointer(a->ies); |
1421 | if (!a_ies) | |
1422 | return -1; | |
1423 | b_ies = rcu_access_pointer(b->ies); | |
1424 | if (!b_ies) | |
1425 | return 1; | |
1426 | ||
3af6341c JB |
1427 | if (WLAN_CAPABILITY_IS_STA_BSS(a->capability)) |
1428 | ie1 = cfg80211_find_ie(WLAN_EID_MESH_ID, | |
1429 | a_ies->data, a_ies->len); | |
1430 | if (WLAN_CAPABILITY_IS_STA_BSS(b->capability)) | |
1431 | ie2 = cfg80211_find_ie(WLAN_EID_MESH_ID, | |
1432 | b_ies->data, b_ies->len); | |
1433 | if (ie1 && ie2) { | |
1434 | int mesh_id_cmp; | |
1435 | ||
1436 | if (ie1[1] == ie2[1]) | |
1437 | mesh_id_cmp = memcmp(ie1 + 2, ie2 + 2, ie1[1]); | |
1438 | else | |
1439 | mesh_id_cmp = ie2[1] - ie1[1]; | |
1440 | ||
1441 | ie1 = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
1442 | a_ies->data, a_ies->len); | |
1443 | ie2 = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
1444 | b_ies->data, b_ies->len); | |
1445 | if (ie1 && ie2) { | |
1446 | if (mesh_id_cmp) | |
1447 | return mesh_id_cmp; | |
1448 | if (ie1[1] != ie2[1]) | |
1449 | return ie2[1] - ie1[1]; | |
1450 | return memcmp(ie1 + 2, ie2 + 2, ie1[1]); | |
1451 | } | |
1452 | } | |
1453 | ||
3af6341c JB |
1454 | r = memcmp(a->bssid, b->bssid, sizeof(a->bssid)); |
1455 | if (r) | |
1456 | return r; | |
1457 | ||
9caf0364 JB |
1458 | ie1 = cfg80211_find_ie(WLAN_EID_SSID, a_ies->data, a_ies->len); |
1459 | ie2 = cfg80211_find_ie(WLAN_EID_SSID, b_ies->data, b_ies->len); | |
dd9dfb9f | 1460 | |
5622f5bb JB |
1461 | if (!ie1 && !ie2) |
1462 | return 0; | |
1463 | ||
f94f8b16 | 1464 | /* |
5622f5bb JB |
1465 | * Note that with "hide_ssid", the function returns a match if |
1466 | * the already-present BSS ("b") is a hidden SSID beacon for | |
1467 | * the new BSS ("a"). | |
f94f8b16 | 1468 | */ |
dd9dfb9f DT |
1469 | |
1470 | /* sort missing IE before (left of) present IE */ | |
1471 | if (!ie1) | |
1472 | return -1; | |
1473 | if (!ie2) | |
1474 | return 1; | |
1475 | ||
4593c4cb JB |
1476 | switch (mode) { |
1477 | case BSS_CMP_HIDE_ZLEN: | |
1478 | /* | |
1479 | * In ZLEN mode we assume the BSS entry we're | |
1480 | * looking for has a zero-length SSID. So if | |
1481 | * the one we're looking at right now has that, | |
1482 | * return 0. Otherwise, return the difference | |
1483 | * in length, but since we're looking for the | |
1484 | * 0-length it's really equivalent to returning | |
1485 | * the length of the one we're looking at. | |
1486 | * | |
1487 | * No content comparison is needed as we assume | |
1488 | * the content length is zero. | |
1489 | */ | |
1490 | return ie2[1]; | |
1491 | case BSS_CMP_REGULAR: | |
1492 | default: | |
1493 | /* sort by length first, then by contents */ | |
1494 | if (ie1[1] != ie2[1]) | |
1495 | return ie2[1] - ie1[1]; | |
5622f5bb | 1496 | return memcmp(ie1 + 2, ie2 + 2, ie1[1]); |
4593c4cb JB |
1497 | case BSS_CMP_HIDE_NUL: |
1498 | if (ie1[1] != ie2[1]) | |
1499 | return ie2[1] - ie1[1]; | |
1500 | /* this is equivalent to memcmp(zeroes, ie2 + 2, len) */ | |
1501 | for (i = 0; i < ie2[1]; i++) | |
1502 | if (ie2[i + 2]) | |
1503 | return -1; | |
1504 | return 0; | |
1505 | } | |
dd9dfb9f DT |
1506 | } |
1507 | ||
6eb18137 | 1508 | static bool cfg80211_bss_type_match(u16 capability, |
57fbcce3 | 1509 | enum nl80211_band band, |
6eb18137 DL |
1510 | enum ieee80211_bss_type bss_type) |
1511 | { | |
1512 | bool ret = true; | |
1513 | u16 mask, val; | |
1514 | ||
1515 | if (bss_type == IEEE80211_BSS_TYPE_ANY) | |
1516 | return ret; | |
1517 | ||
57fbcce3 | 1518 | if (band == NL80211_BAND_60GHZ) { |
6eb18137 DL |
1519 | mask = WLAN_CAPABILITY_DMG_TYPE_MASK; |
1520 | switch (bss_type) { | |
1521 | case IEEE80211_BSS_TYPE_ESS: | |
1522 | val = WLAN_CAPABILITY_DMG_TYPE_AP; | |
1523 | break; | |
1524 | case IEEE80211_BSS_TYPE_PBSS: | |
1525 | val = WLAN_CAPABILITY_DMG_TYPE_PBSS; | |
1526 | break; | |
1527 | case IEEE80211_BSS_TYPE_IBSS: | |
1528 | val = WLAN_CAPABILITY_DMG_TYPE_IBSS; | |
1529 | break; | |
1530 | default: | |
1531 | return false; | |
1532 | } | |
1533 | } else { | |
1534 | mask = WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS; | |
1535 | switch (bss_type) { | |
1536 | case IEEE80211_BSS_TYPE_ESS: | |
1537 | val = WLAN_CAPABILITY_ESS; | |
1538 | break; | |
1539 | case IEEE80211_BSS_TYPE_IBSS: | |
1540 | val = WLAN_CAPABILITY_IBSS; | |
1541 | break; | |
1542 | case IEEE80211_BSS_TYPE_MBSS: | |
1543 | val = 0; | |
1544 | break; | |
1545 | default: | |
1546 | return false; | |
1547 | } | |
1548 | } | |
1549 | ||
1550 | ret = ((capability & mask) == val); | |
1551 | return ret; | |
1552 | } | |
1553 | ||
0e3a39b5 | 1554 | /* Returned bss is reference counted and must be cleaned up appropriately. */ |
d02a12b8 JB |
1555 | struct cfg80211_bss *__cfg80211_get_bss(struct wiphy *wiphy, |
1556 | struct ieee80211_channel *channel, | |
1557 | const u8 *bssid, | |
1558 | const u8 *ssid, size_t ssid_len, | |
1559 | enum ieee80211_bss_type bss_type, | |
1560 | enum ieee80211_privacy privacy, | |
1561 | u32 use_for) | |
2a519311 | 1562 | { |
f26cbf40 | 1563 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
2a519311 | 1564 | struct cfg80211_internal_bss *bss, *res = NULL; |
ccb6c136 | 1565 | unsigned long now = jiffies; |
6eb18137 | 1566 | int bss_privacy; |
2a519311 | 1567 | |
6eb18137 DL |
1568 | trace_cfg80211_get_bss(wiphy, channel, bssid, ssid, ssid_len, bss_type, |
1569 | privacy); | |
4ee3e063 | 1570 | |
1b8ec87a | 1571 | spin_lock_bh(&rdev->bss_lock); |
2a519311 | 1572 | |
1b8ec87a | 1573 | list_for_each_entry(bss, &rdev->bss_list, list) { |
6eb18137 DL |
1574 | if (!cfg80211_bss_type_match(bss->pub.capability, |
1575 | bss->pub.channel->band, bss_type)) | |
1576 | continue; | |
1577 | ||
1578 | bss_privacy = (bss->pub.capability & WLAN_CAPABILITY_PRIVACY); | |
1579 | if ((privacy == IEEE80211_PRIVACY_ON && !bss_privacy) || | |
1580 | (privacy == IEEE80211_PRIVACY_OFF && bss_privacy)) | |
79420f09 | 1581 | continue; |
2a519311 JB |
1582 | if (channel && bss->pub.channel != channel) |
1583 | continue; | |
c14a7400 JB |
1584 | if (!is_valid_ether_addr(bss->pub.bssid)) |
1585 | continue; | |
d02a12b8 JB |
1586 | if ((bss->pub.use_for & use_for) != use_for) |
1587 | continue; | |
ccb6c136 JB |
1588 | /* Don't get expired BSS structs */ |
1589 | if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && | |
1590 | !atomic_read(&bss->hold)) | |
1591 | continue; | |
2a519311 JB |
1592 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
1593 | res = bss; | |
1b8ec87a | 1594 | bss_ref_get(rdev, res); |
2a519311 JB |
1595 | break; |
1596 | } | |
1597 | } | |
1598 | ||
1b8ec87a | 1599 | spin_unlock_bh(&rdev->bss_lock); |
2a519311 JB |
1600 | if (!res) |
1601 | return NULL; | |
4ee3e063 | 1602 | trace_cfg80211_return_bss(&res->pub); |
2a519311 JB |
1603 | return &res->pub; |
1604 | } | |
d02a12b8 | 1605 | EXPORT_SYMBOL(__cfg80211_get_bss); |
2a519311 | 1606 | |
7f12e26a | 1607 | static bool rb_insert_bss(struct cfg80211_registered_device *rdev, |
2a519311 JB |
1608 | struct cfg80211_internal_bss *bss) |
1609 | { | |
1b8ec87a | 1610 | struct rb_node **p = &rdev->bss_tree.rb_node; |
2a519311 JB |
1611 | struct rb_node *parent = NULL; |
1612 | struct cfg80211_internal_bss *tbss; | |
1613 | int cmp; | |
1614 | ||
1615 | while (*p) { | |
1616 | parent = *p; | |
1617 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); | |
1618 | ||
4593c4cb | 1619 | cmp = cmp_bss(&bss->pub, &tbss->pub, BSS_CMP_REGULAR); |
2a519311 JB |
1620 | |
1621 | if (WARN_ON(!cmp)) { | |
1622 | /* will sort of leak this BSS */ | |
7f12e26a | 1623 | return false; |
2a519311 JB |
1624 | } |
1625 | ||
1626 | if (cmp < 0) | |
1627 | p = &(*p)->rb_left; | |
1628 | else | |
1629 | p = &(*p)->rb_right; | |
1630 | } | |
1631 | ||
1632 | rb_link_node(&bss->rbn, parent, p); | |
1b8ec87a | 1633 | rb_insert_color(&bss->rbn, &rdev->bss_tree); |
7f12e26a | 1634 | return true; |
2a519311 JB |
1635 | } |
1636 | ||
1637 | static struct cfg80211_internal_bss * | |
1b8ec87a | 1638 | rb_find_bss(struct cfg80211_registered_device *rdev, |
5622f5bb | 1639 | struct cfg80211_internal_bss *res, |
4593c4cb | 1640 | enum bss_compare_mode mode) |
dd9dfb9f | 1641 | { |
1b8ec87a | 1642 | struct rb_node *n = rdev->bss_tree.rb_node; |
dd9dfb9f DT |
1643 | struct cfg80211_internal_bss *bss; |
1644 | int r; | |
1645 | ||
1646 | while (n) { | |
1647 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); | |
4593c4cb | 1648 | r = cmp_bss(&res->pub, &bss->pub, mode); |
dd9dfb9f DT |
1649 | |
1650 | if (r == 0) | |
1651 | return bss; | |
1652 | else if (r < 0) | |
1653 | n = n->rb_left; | |
1654 | else | |
1655 | n = n->rb_right; | |
1656 | } | |
1657 | ||
1658 | return NULL; | |
1659 | } | |
1660 | ||
7f12e26a JB |
1661 | static void cfg80211_insert_bss(struct cfg80211_registered_device *rdev, |
1662 | struct cfg80211_internal_bss *bss) | |
1663 | { | |
1664 | lockdep_assert_held(&rdev->bss_lock); | |
1665 | ||
1666 | if (!rb_insert_bss(rdev, bss)) | |
1667 | return; | |
1668 | list_add_tail(&bss->list, &rdev->bss_list); | |
1669 | rdev->bss_entries++; | |
1670 | } | |
1671 | ||
1672 | static void cfg80211_rehash_bss(struct cfg80211_registered_device *rdev, | |
1673 | struct cfg80211_internal_bss *bss) | |
1674 | { | |
1675 | lockdep_assert_held(&rdev->bss_lock); | |
1676 | ||
1677 | rb_erase(&bss->rbn, &rdev->bss_tree); | |
1678 | if (!rb_insert_bss(rdev, bss)) { | |
1679 | list_del(&bss->list); | |
1680 | if (!list_empty(&bss->hidden_list)) | |
1681 | list_del_init(&bss->hidden_list); | |
1682 | if (!list_empty(&bss->pub.nontrans_list)) | |
1683 | list_del_init(&bss->pub.nontrans_list); | |
1684 | rdev->bss_entries--; | |
1685 | } | |
1686 | rdev->bss_generation++; | |
1687 | } | |
1688 | ||
1b8ec87a | 1689 | static bool cfg80211_combine_bsses(struct cfg80211_registered_device *rdev, |
776b3580 | 1690 | struct cfg80211_internal_bss *new) |
dd9dfb9f | 1691 | { |
9caf0364 | 1692 | const struct cfg80211_bss_ies *ies; |
776b3580 JB |
1693 | struct cfg80211_internal_bss *bss; |
1694 | const u8 *ie; | |
1695 | int i, ssidlen; | |
1696 | u8 fold = 0; | |
9853a55e | 1697 | u32 n_entries = 0; |
9caf0364 | 1698 | |
776b3580 | 1699 | ies = rcu_access_pointer(new->pub.beacon_ies); |
9caf0364 | 1700 | if (WARN_ON(!ies)) |
776b3580 | 1701 | return false; |
dd9dfb9f | 1702 | |
776b3580 JB |
1703 | ie = cfg80211_find_ie(WLAN_EID_SSID, ies->data, ies->len); |
1704 | if (!ie) { | |
1705 | /* nothing to do */ | |
1706 | return true; | |
1707 | } | |
1708 | ||
1709 | ssidlen = ie[1]; | |
1710 | for (i = 0; i < ssidlen; i++) | |
1711 | fold |= ie[2 + i]; | |
1712 | ||
1713 | if (fold) { | |
1714 | /* not a hidden SSID */ | |
1715 | return true; | |
1716 | } | |
1717 | ||
1718 | /* This is the bad part ... */ | |
1719 | ||
1b8ec87a | 1720 | list_for_each_entry(bss, &rdev->bss_list, list) { |
9853a55e JB |
1721 | /* |
1722 | * we're iterating all the entries anyway, so take the | |
1723 | * opportunity to validate the list length accounting | |
1724 | */ | |
1725 | n_entries++; | |
1726 | ||
776b3580 JB |
1727 | if (!ether_addr_equal(bss->pub.bssid, new->pub.bssid)) |
1728 | continue; | |
1729 | if (bss->pub.channel != new->pub.channel) | |
1730 | continue; | |
1731 | if (rcu_access_pointer(bss->pub.beacon_ies)) | |
1732 | continue; | |
1733 | ies = rcu_access_pointer(bss->pub.ies); | |
1734 | if (!ies) | |
1735 | continue; | |
1736 | ie = cfg80211_find_ie(WLAN_EID_SSID, ies->data, ies->len); | |
1737 | if (!ie) | |
1738 | continue; | |
1739 | if (ssidlen && ie[1] != ssidlen) | |
1740 | continue; | |
776b3580 JB |
1741 | if (WARN_ON_ONCE(bss->pub.hidden_beacon_bss)) |
1742 | continue; | |
1743 | if (WARN_ON_ONCE(!list_empty(&bss->hidden_list))) | |
1744 | list_del(&bss->hidden_list); | |
1745 | /* combine them */ | |
1746 | list_add(&bss->hidden_list, &new->hidden_list); | |
1747 | bss->pub.hidden_beacon_bss = &new->pub; | |
1748 | new->refcount += bss->refcount; | |
1749 | rcu_assign_pointer(bss->pub.beacon_ies, | |
1750 | new->pub.beacon_ies); | |
1751 | } | |
1752 | ||
9853a55e JB |
1753 | WARN_ONCE(n_entries != rdev->bss_entries, |
1754 | "rdev bss entries[%d]/list[len:%d] corruption\n", | |
1755 | rdev->bss_entries, n_entries); | |
1756 | ||
776b3580 | 1757 | return true; |
dd9dfb9f DT |
1758 | } |
1759 | ||
c90b93b5 JB |
1760 | static void cfg80211_update_hidden_bsses(struct cfg80211_internal_bss *known, |
1761 | const struct cfg80211_bss_ies *new_ies, | |
1762 | const struct cfg80211_bss_ies *old_ies) | |
1763 | { | |
1764 | struct cfg80211_internal_bss *bss; | |
1765 | ||
1766 | /* Assign beacon IEs to all sub entries */ | |
1767 | list_for_each_entry(bss, &known->hidden_list, hidden_list) { | |
1768 | const struct cfg80211_bss_ies *ies; | |
1769 | ||
1770 | ies = rcu_access_pointer(bss->pub.beacon_ies); | |
1771 | WARN_ON(ies != old_ies); | |
1772 | ||
1773 | rcu_assign_pointer(bss->pub.beacon_ies, new_ies); | |
1774 | } | |
1775 | } | |
1776 | ||
177fbbcb JB |
1777 | static void cfg80211_check_stuck_ecsa(struct cfg80211_registered_device *rdev, |
1778 | struct cfg80211_internal_bss *known, | |
1779 | const struct cfg80211_bss_ies *old) | |
1780 | { | |
1781 | const struct ieee80211_ext_chansw_ie *ecsa; | |
1782 | const struct element *elem_new, *elem_old; | |
1783 | const struct cfg80211_bss_ies *new, *bcn; | |
1784 | ||
1785 | if (known->pub.proberesp_ecsa_stuck) | |
1786 | return; | |
1787 | ||
1788 | new = rcu_dereference_protected(known->pub.proberesp_ies, | |
1789 | lockdep_is_held(&rdev->bss_lock)); | |
1790 | if (WARN_ON(!new)) | |
1791 | return; | |
1792 | ||
1793 | if (new->tsf - old->tsf < USEC_PER_SEC) | |
1794 | return; | |
1795 | ||
1796 | elem_old = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, | |
1797 | old->data, old->len); | |
1798 | if (!elem_old) | |
1799 | return; | |
1800 | ||
1801 | elem_new = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, | |
1802 | new->data, new->len); | |
1803 | if (!elem_new) | |
1804 | return; | |
1805 | ||
1806 | bcn = rcu_dereference_protected(known->pub.beacon_ies, | |
1807 | lockdep_is_held(&rdev->bss_lock)); | |
1808 | if (bcn && | |
1809 | cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, | |
1810 | bcn->data, bcn->len)) | |
1811 | return; | |
1812 | ||
1813 | if (elem_new->datalen != elem_old->datalen) | |
1814 | return; | |
1815 | if (elem_new->datalen < sizeof(struct ieee80211_ext_chansw_ie)) | |
1816 | return; | |
1817 | if (memcmp(elem_new->data, elem_old->data, elem_new->datalen)) | |
1818 | return; | |
1819 | ||
1820 | ecsa = (void *)elem_new->data; | |
1821 | ||
1822 | if (!ecsa->mode) | |
1823 | return; | |
1824 | ||
1825 | if (ecsa->new_ch_num != | |
1826 | ieee80211_frequency_to_channel(known->pub.channel->center_freq)) | |
1827 | return; | |
1828 | ||
1829 | known->pub.proberesp_ecsa_stuck = 1; | |
1830 | } | |
1831 | ||
3ab8227d SM |
1832 | static bool |
1833 | cfg80211_update_known_bss(struct cfg80211_registered_device *rdev, | |
1834 | struct cfg80211_internal_bss *known, | |
1835 | struct cfg80211_internal_bss *new, | |
1836 | bool signal_valid) | |
1837 | { | |
1838 | lockdep_assert_held(&rdev->bss_lock); | |
1839 | ||
1840 | /* Update IEs */ | |
1841 | if (rcu_access_pointer(new->pub.proberesp_ies)) { | |
1842 | const struct cfg80211_bss_ies *old; | |
1843 | ||
1844 | old = rcu_access_pointer(known->pub.proberesp_ies); | |
1845 | ||
1846 | rcu_assign_pointer(known->pub.proberesp_ies, | |
1847 | new->pub.proberesp_ies); | |
1848 | /* Override possible earlier Beacon frame IEs */ | |
1849 | rcu_assign_pointer(known->pub.ies, | |
1850 | new->pub.proberesp_ies); | |
177fbbcb JB |
1851 | if (old) { |
1852 | cfg80211_check_stuck_ecsa(rdev, known, old); | |
3ab8227d | 1853 | kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); |
177fbbcb | 1854 | } |
f510bcc2 BB |
1855 | } |
1856 | ||
1857 | if (rcu_access_pointer(new->pub.beacon_ies)) { | |
3ab8227d | 1858 | const struct cfg80211_bss_ies *old; |
3ab8227d SM |
1859 | |
1860 | if (known->pub.hidden_beacon_bss && | |
1861 | !list_empty(&known->hidden_list)) { | |
1862 | const struct cfg80211_bss_ies *f; | |
1863 | ||
1864 | /* The known BSS struct is one of the probe | |
1865 | * response members of a group, but we're | |
1866 | * receiving a beacon (beacon_ies in the new | |
1867 | * bss is used). This can only mean that the | |
1868 | * AP changed its beacon from not having an | |
1869 | * SSID to showing it, which is confusing so | |
1870 | * drop this information. | |
1871 | */ | |
1872 | ||
1873 | f = rcu_access_pointer(new->pub.beacon_ies); | |
1874 | kfree_rcu((struct cfg80211_bss_ies *)f, rcu_head); | |
1875 | return false; | |
1876 | } | |
1877 | ||
1878 | old = rcu_access_pointer(known->pub.beacon_ies); | |
1879 | ||
1880 | rcu_assign_pointer(known->pub.beacon_ies, new->pub.beacon_ies); | |
1881 | ||
1882 | /* Override IEs if they were from a beacon before */ | |
1883 | if (old == rcu_access_pointer(known->pub.ies)) | |
1884 | rcu_assign_pointer(known->pub.ies, new->pub.beacon_ies); | |
1885 | ||
03c0ad4b JB |
1886 | cfg80211_update_hidden_bsses(known, |
1887 | rcu_access_pointer(new->pub.beacon_ies), | |
1888 | old); | |
3ab8227d SM |
1889 | |
1890 | if (old) | |
1891 | kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head); | |
1892 | } | |
1893 | ||
1894 | known->pub.beacon_interval = new->pub.beacon_interval; | |
1895 | ||
1896 | /* don't update the signal if beacon was heard on | |
1897 | * adjacent channel. | |
1898 | */ | |
1899 | if (signal_valid) | |
1900 | known->pub.signal = new->pub.signal; | |
1901 | known->pub.capability = new->pub.capability; | |
1902 | known->ts = new->ts; | |
1903 | known->ts_boottime = new->ts_boottime; | |
1904 | known->parent_tsf = new->parent_tsf; | |
1905 | known->pub.chains = new->pub.chains; | |
1906 | memcpy(known->pub.chain_signal, new->pub.chain_signal, | |
1907 | IEEE80211_MAX_CHAINS); | |
1908 | ether_addr_copy(known->parent_bssid, new->parent_bssid); | |
1909 | known->pub.max_bssid_indicator = new->pub.max_bssid_indicator; | |
1910 | known->pub.bssid_index = new->pub.bssid_index; | |
d02a12b8 JB |
1911 | known->pub.use_for &= new->pub.use_for; |
1912 | known->pub.cannot_use_reasons = new->pub.cannot_use_reasons; | |
bff93c89 | 1913 | known->bss_source = new->bss_source; |
3ab8227d SM |
1914 | |
1915 | return true; | |
1916 | } | |
1917 | ||
0e3a39b5 | 1918 | /* Returned bss is reference counted and must be cleaned up appropriately. */ |
6b7c93c1 BB |
1919 | static struct cfg80211_internal_bss * |
1920 | __cfg80211_bss_update(struct cfg80211_registered_device *rdev, | |
1921 | struct cfg80211_internal_bss *tmp, | |
1922 | bool signal_valid, unsigned long ts) | |
2a519311 JB |
1923 | { |
1924 | struct cfg80211_internal_bss *found = NULL; | |
31c5e92b | 1925 | struct cfg80211_bss_ies *ies; |
2a519311 | 1926 | |
9caf0364 | 1927 | if (WARN_ON(!tmp->pub.channel)) |
31c5e92b | 1928 | goto free_ies; |
2a519311 | 1929 | |
a3ce17d1 | 1930 | tmp->ts = ts; |
2a519311 | 1931 | |
31c5e92b BB |
1932 | if (WARN_ON(!rcu_access_pointer(tmp->pub.ies))) |
1933 | goto free_ies; | |
9caf0364 | 1934 | |
1b8ec87a | 1935 | found = rb_find_bss(rdev, tmp, BSS_CMP_REGULAR); |
2a519311 | 1936 | |
cd1658f5 | 1937 | if (found) { |
3ab8227d | 1938 | if (!cfg80211_update_known_bss(rdev, found, tmp, signal_valid)) |
6b7c93c1 | 1939 | return NULL; |
2a519311 | 1940 | } else { |
9caf0364 | 1941 | struct cfg80211_internal_bss *new; |
dd9dfb9f DT |
1942 | struct cfg80211_internal_bss *hidden; |
1943 | ||
9caf0364 JB |
1944 | /* |
1945 | * create a copy -- the "res" variable that is passed in | |
1946 | * is allocated on the stack since it's not needed in the | |
1947 | * more common case of an update | |
1948 | */ | |
1b8ec87a | 1949 | new = kzalloc(sizeof(*new) + rdev->wiphy.bss_priv_size, |
9caf0364 | 1950 | GFP_ATOMIC); |
31c5e92b BB |
1951 | if (!new) |
1952 | goto free_ies; | |
9caf0364 | 1953 | memcpy(new, tmp, sizeof(*new)); |
776b3580 JB |
1954 | new->refcount = 1; |
1955 | INIT_LIST_HEAD(&new->hidden_list); | |
7011ba58 | 1956 | INIT_LIST_HEAD(&new->pub.nontrans_list); |
0b780881 JB |
1957 | /* we'll set this later if it was non-NULL */ |
1958 | new->pub.transmitted_bss = NULL; | |
776b3580 JB |
1959 | |
1960 | if (rcu_access_pointer(tmp->pub.proberesp_ies)) { | |
1b8ec87a | 1961 | hidden = rb_find_bss(rdev, tmp, BSS_CMP_HIDE_ZLEN); |
776b3580 | 1962 | if (!hidden) |
1b8ec87a | 1963 | hidden = rb_find_bss(rdev, tmp, |
776b3580 JB |
1964 | BSS_CMP_HIDE_NUL); |
1965 | if (hidden) { | |
1966 | new->pub.hidden_beacon_bss = &hidden->pub; | |
1967 | list_add(&new->hidden_list, | |
1968 | &hidden->hidden_list); | |
1969 | hidden->refcount++; | |
32af9a9e | 1970 | |
1184950e | 1971 | ies = (void *)rcu_access_pointer(new->pub.beacon_ies); |
776b3580 JB |
1972 | rcu_assign_pointer(new->pub.beacon_ies, |
1973 | hidden->pub.beacon_ies); | |
32af9a9e BB |
1974 | if (ies) |
1975 | kfree_rcu(ies, rcu_head); | |
776b3580 JB |
1976 | } |
1977 | } else { | |
1978 | /* | |
1979 | * Ok so we found a beacon, and don't have an entry. If | |
1980 | * it's a beacon with hidden SSID, we might be in for an | |
1981 | * expensive search for any probe responses that should | |
1982 | * be grouped with this beacon for updates ... | |
1983 | */ | |
1b8ec87a | 1984 | if (!cfg80211_combine_bsses(rdev, new)) { |
f9a5c358 | 1985 | bss_ref_put(rdev, new); |
6b7c93c1 | 1986 | return NULL; |
776b3580 JB |
1987 | } |
1988 | } | |
1989 | ||
9853a55e JB |
1990 | if (rdev->bss_entries >= bss_entries_limit && |
1991 | !cfg80211_bss_expire_oldest(rdev)) { | |
f9a5c358 | 1992 | bss_ref_put(rdev, new); |
6b7c93c1 | 1993 | return NULL; |
9853a55e JB |
1994 | } |
1995 | ||
a3584f56 | 1996 | /* This must be before the call to bss_ref_get */ |
0cd01efb | 1997 | if (tmp->pub.transmitted_bss) { |
0cd01efb | 1998 | new->pub.transmitted_bss = tmp->pub.transmitted_bss; |
61e41e5d | 1999 | bss_ref_get(rdev, bss_from_pub(tmp->pub.transmitted_bss)); |
a3584f56 SS |
2000 | } |
2001 | ||
7f12e26a | 2002 | cfg80211_insert_bss(rdev, new); |
9caf0364 | 2003 | found = new; |
2a519311 JB |
2004 | } |
2005 | ||
1b8ec87a ZG |
2006 | rdev->bss_generation++; |
2007 | bss_ref_get(rdev, found); | |
2a519311 | 2008 | |
2a519311 | 2009 | return found; |
31c5e92b BB |
2010 | |
2011 | free_ies: | |
f54a1bae | 2012 | ies = (void *)rcu_access_pointer(tmp->pub.beacon_ies); |
31c5e92b BB |
2013 | if (ies) |
2014 | kfree_rcu(ies, rcu_head); | |
f54a1bae | 2015 | ies = (void *)rcu_access_pointer(tmp->pub.proberesp_ies); |
31c5e92b BB |
2016 | if (ies) |
2017 | kfree_rcu(ies, rcu_head); | |
2018 | ||
2019 | return NULL; | |
6b7c93c1 BB |
2020 | } |
2021 | ||
2022 | struct cfg80211_internal_bss * | |
2023 | cfg80211_bss_update(struct cfg80211_registered_device *rdev, | |
2024 | struct cfg80211_internal_bss *tmp, | |
2025 | bool signal_valid, unsigned long ts) | |
2026 | { | |
2027 | struct cfg80211_internal_bss *res; | |
2028 | ||
2029 | spin_lock_bh(&rdev->bss_lock); | |
2030 | res = __cfg80211_bss_update(rdev, tmp, signal_valid, ts); | |
1b8ec87a | 2031 | spin_unlock_bh(&rdev->bss_lock); |
6b7c93c1 BB |
2032 | |
2033 | return res; | |
2a519311 JB |
2034 | } |
2035 | ||
97981d89 | 2036 | int cfg80211_get_ies_channel_number(const u8 *ie, size_t ielen, |
6ff9efcf | 2037 | enum nl80211_band band) |
0172bb75 | 2038 | { |
75cca1fa | 2039 | const struct element *tmp; |
0172bb75 | 2040 | |
7f599aec | 2041 | if (band == NL80211_BAND_6GHZ) { |
7f599aec AB |
2042 | struct ieee80211_he_operation *he_oper; |
2043 | ||
75cca1fa JB |
2044 | tmp = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, ie, |
2045 | ielen); | |
2046 | if (tmp && tmp->datalen >= sizeof(*he_oper) && | |
2047 | tmp->datalen >= ieee80211_he_oper_size(&tmp->data[1])) { | |
7f599aec AB |
2048 | const struct ieee80211_he_6ghz_oper *he_6ghz_oper; |
2049 | ||
75cca1fa | 2050 | he_oper = (void *)&tmp->data[1]; |
7f599aec AB |
2051 | |
2052 | he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); | |
2053 | if (!he_6ghz_oper) | |
75cca1fa | 2054 | return -1; |
7f599aec | 2055 | |
724a486c | 2056 | return he_6ghz_oper->primary; |
7f599aec AB |
2057 | } |
2058 | } else if (band == NL80211_BAND_S1GHZ) { | |
75cca1fa JB |
2059 | tmp = cfg80211_find_elem(WLAN_EID_S1G_OPERATION, ie, ielen); |
2060 | if (tmp && tmp->datalen >= sizeof(struct ieee80211_s1g_oper_ie)) { | |
2061 | struct ieee80211_s1g_oper_ie *s1gop = (void *)tmp->data; | |
66b0564d | 2062 | |
e847ffe2 | 2063 | return s1gop->oper_ch; |
66b0564d | 2064 | } |
0172bb75 | 2065 | } else { |
75cca1fa JB |
2066 | tmp = cfg80211_find_elem(WLAN_EID_DS_PARAMS, ie, ielen); |
2067 | if (tmp && tmp->datalen == 1) | |
2068 | return tmp->data[0]; | |
0172bb75 | 2069 | |
75cca1fa JB |
2070 | tmp = cfg80211_find_elem(WLAN_EID_HT_OPERATION, ie, ielen); |
2071 | if (tmp && | |
2072 | tmp->datalen >= sizeof(struct ieee80211_ht_operation)) { | |
2073 | struct ieee80211_ht_operation *htop = (void *)tmp->data; | |
2074 | ||
2075 | return htop->primary_chan; | |
0172bb75 JB |
2076 | } |
2077 | } | |
2078 | ||
75cca1fa | 2079 | return -1; |
97981d89 WG |
2080 | } |
2081 | EXPORT_SYMBOL(cfg80211_get_ies_channel_number); | |
2082 | ||
2083 | /* | |
2084 | * Update RX channel information based on the available frame payload | |
2085 | * information. This is mainly for the 2.4 GHz band where frames can be received | |
2086 | * from neighboring channels and the Beacon frames use the DSSS Parameter Set | |
2087 | * element to indicate the current (transmitting) channel, but this might also | |
2088 | * be needed on other bands if RX frequency does not match with the actual | |
7f599aec | 2089 | * operating channel of a BSS, or if the AP reports a different primary channel. |
97981d89 WG |
2090 | */ |
2091 | static struct ieee80211_channel * | |
2092 | cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, | |
5add321c | 2093 | struct ieee80211_channel *channel) |
97981d89 WG |
2094 | { |
2095 | u32 freq; | |
2096 | int channel_number; | |
2097 | struct ieee80211_channel *alt_channel; | |
2098 | ||
7f599aec | 2099 | channel_number = cfg80211_get_ies_channel_number(ie, ielen, |
6ff9efcf | 2100 | channel->band); |
97981d89 | 2101 | |
119f94a6 JM |
2102 | if (channel_number < 0) { |
2103 | /* No channel information in frame payload */ | |
0172bb75 | 2104 | return channel; |
119f94a6 | 2105 | } |
0172bb75 | 2106 | |
934f4c7d | 2107 | freq = ieee80211_channel_to_freq_khz(channel_number, channel->band); |
7f599aec AB |
2108 | |
2109 | /* | |
fb4b441c MG |
2110 | * Frame info (beacon/prob res) is the same as received channel, |
2111 | * no need for further processing. | |
7f599aec | 2112 | */ |
fb4b441c | 2113 | if (freq == ieee80211_channel_to_khz(channel)) |
7f599aec AB |
2114 | return channel; |
2115 | ||
934f4c7d | 2116 | alt_channel = ieee80211_get_channel_khz(wiphy, freq); |
119f94a6 | 2117 | if (!alt_channel) { |
fb4b441c MG |
2118 | if (channel->band == NL80211_BAND_2GHZ || |
2119 | channel->band == NL80211_BAND_6GHZ) { | |
119f94a6 JM |
2120 | /* |
2121 | * Better not allow unexpected channels when that could | |
2122 | * be going beyond the 1-11 range (e.g., discovering | |
2123 | * BSS on channel 12 when radio is configured for | |
fb4b441c | 2124 | * channel 11) or beyond the 6 GHz channel range. |
119f94a6 JM |
2125 | */ |
2126 | return NULL; | |
2127 | } | |
2128 | ||
2129 | /* No match for the payload channel number - ignore it */ | |
2130 | return channel; | |
2131 | } | |
2132 | ||
119f94a6 JM |
2133 | /* |
2134 | * Use the channel determined through the payload channel number | |
2135 | * instead of the RX channel reported by the driver. | |
2136 | */ | |
2137 | if (alt_channel->flags & IEEE80211_CHAN_DISABLED) | |
0172bb75 | 2138 | return NULL; |
119f94a6 | 2139 | return alt_channel; |
0172bb75 JB |
2140 | } |
2141 | ||
eb142608 BB |
2142 | struct cfg80211_inform_single_bss_data { |
2143 | struct cfg80211_inform_bss *drv_data; | |
2144 | enum cfg80211_bss_frame_type ftype; | |
2481b5da | 2145 | struct ieee80211_channel *channel; |
eb142608 BB |
2146 | u8 bssid[ETH_ALEN]; |
2147 | u64 tsf; | |
2148 | u16 capability; | |
2149 | u16 beacon_interval; | |
2150 | const u8 *ie; | |
2151 | size_t ielen; | |
2152 | ||
0fdcc994 | 2153 | enum bss_source_type bss_source; |
2481b5da | 2154 | /* Set if reporting bss_source != BSS_SOURCE_DIRECT */ |
eb142608 BB |
2155 | struct cfg80211_bss *source_bss; |
2156 | u8 max_bssid_indicator; | |
2157 | u8 bssid_index; | |
d02a12b8 JB |
2158 | |
2159 | u8 use_for; | |
2160 | u64 cannot_use_reasons; | |
eb142608 BB |
2161 | }; |
2162 | ||
459662e8 JB |
2163 | enum ieee80211_ap_reg_power |
2164 | cfg80211_get_6ghz_power_type(const u8 *elems, size_t elems_len) | |
317bad4c | 2165 | { |
459662e8 | 2166 | const struct ieee80211_he_6ghz_oper *he_6ghz_oper; |
317bad4c | 2167 | struct ieee80211_he_operation *he_oper; |
459662e8 | 2168 | const struct element *tmp; |
317bad4c | 2169 | |
459662e8 JB |
2170 | tmp = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_OPERATION, |
2171 | elems, elems_len); | |
2172 | if (!tmp || tmp->datalen < sizeof(*he_oper) + 1 || | |
2173 | tmp->datalen < ieee80211_he_oper_size(tmp->data + 1)) | |
2174 | return IEEE80211_REG_UNSET_AP; | |
2175 | ||
2176 | he_oper = (void *)&tmp->data[1]; | |
2177 | he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper); | |
2178 | ||
2179 | if (!he_6ghz_oper) | |
2180 | return IEEE80211_REG_UNSET_AP; | |
2181 | ||
2182 | switch (u8_get_bits(he_6ghz_oper->control, | |
2183 | IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { | |
2184 | case IEEE80211_6GHZ_CTRL_REG_LPI_AP: | |
2185 | case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: | |
2186 | return IEEE80211_REG_LPI_AP; | |
2187 | case IEEE80211_6GHZ_CTRL_REG_SP_AP: | |
2188 | case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: | |
2189 | return IEEE80211_REG_SP_AP; | |
2190 | case IEEE80211_6GHZ_CTRL_REG_VLP_AP: | |
2191 | return IEEE80211_REG_VLP_AP; | |
2192 | default: | |
2193 | return IEEE80211_REG_UNSET_AP; | |
2194 | } | |
2195 | } | |
317bad4c | 2196 | |
459662e8 JB |
2197 | static bool cfg80211_6ghz_power_type_valid(const u8 *elems, size_t elems_len, |
2198 | const u32 flags) | |
2199 | { | |
2200 | switch (cfg80211_get_6ghz_power_type(elems, elems_len)) { | |
2201 | case IEEE80211_REG_LPI_AP: | |
2202 | return true; | |
2203 | case IEEE80211_REG_SP_AP: | |
2204 | return !(flags & IEEE80211_CHAN_NO_6GHZ_AFC_CLIENT); | |
2205 | case IEEE80211_REG_VLP_AP: | |
2206 | return !(flags & IEEE80211_CHAN_NO_6GHZ_VLP_CLIENT); | |
2207 | default: | |
2208 | return false; | |
317bad4c | 2209 | } |
317bad4c JB |
2210 | } |
2211 | ||
0e3a39b5 | 2212 | /* Returned bss is reference counted and must be cleaned up appropriately. */ |
0b8fb823 PX |
2213 | static struct cfg80211_bss * |
2214 | cfg80211_inform_single_bss_data(struct wiphy *wiphy, | |
eb142608 | 2215 | struct cfg80211_inform_single_bss_data *data, |
0b8fb823 | 2216 | gfp_t gfp) |
06aa7afa | 2217 | { |
0b8fb823 | 2218 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
eb142608 | 2219 | struct cfg80211_inform_bss *drv_data = data->drv_data; |
9caf0364 | 2220 | struct cfg80211_bss_ies *ies; |
3afc2167 | 2221 | struct ieee80211_channel *channel; |
7011ba58 | 2222 | struct cfg80211_internal_bss tmp = {}, *res; |
6eb18137 | 2223 | int bss_type; |
67af9811 | 2224 | bool signal_valid; |
60d7dfea | 2225 | unsigned long ts; |
06aa7afa JK |
2226 | |
2227 | if (WARN_ON(!wiphy)) | |
2228 | return NULL; | |
2229 | ||
22fe88d3 | 2230 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
eb142608 | 2231 | (drv_data->signal < 0 || drv_data->signal > 100))) |
06aa7afa JK |
2232 | return NULL; |
2233 | ||
2481b5da BB |
2234 | if (WARN_ON(data->bss_source != BSS_SOURCE_DIRECT && !data->source_bss)) |
2235 | return NULL; | |
2236 | ||
2237 | channel = data->channel; | |
2238 | if (!channel) | |
2239 | channel = cfg80211_get_bss_channel(wiphy, data->ie, data->ielen, | |
5add321c | 2240 | drv_data->chan); |
0172bb75 JB |
2241 | if (!channel) |
2242 | return NULL; | |
2243 | ||
317bad4c JB |
2244 | if (channel->band == NL80211_BAND_6GHZ && |
2245 | !cfg80211_6ghz_power_type_valid(data->ie, data->ielen, | |
2246 | channel->flags)) { | |
2247 | data->use_for = 0; | |
2248 | data->cannot_use_reasons = | |
2249 | NL80211_BSS_CANNOT_USE_6GHZ_PWR_MISMATCH; | |
2250 | } | |
2251 | ||
eb142608 | 2252 | memcpy(tmp.pub.bssid, data->bssid, ETH_ALEN); |
9caf0364 | 2253 | tmp.pub.channel = channel; |
2481b5da BB |
2254 | if (data->bss_source != BSS_SOURCE_STA_PROFILE) |
2255 | tmp.pub.signal = drv_data->signal; | |
2256 | else | |
2257 | tmp.pub.signal = 0; | |
eb142608 BB |
2258 | tmp.pub.beacon_interval = data->beacon_interval; |
2259 | tmp.pub.capability = data->capability; | |
2260 | tmp.ts_boottime = drv_data->boottime_ns; | |
2261 | tmp.parent_tsf = drv_data->parent_tsf; | |
2262 | ether_addr_copy(tmp.parent_bssid, drv_data->parent_bssid); | |
317bad4c JB |
2263 | tmp.pub.chains = drv_data->chains; |
2264 | memcpy(tmp.pub.chain_signal, drv_data->chain_signal, | |
2265 | IEEE80211_MAX_CHAINS); | |
d02a12b8 JB |
2266 | tmp.pub.use_for = data->use_for; |
2267 | tmp.pub.cannot_use_reasons = data->cannot_use_reasons; | |
bff93c89 | 2268 | tmp.bss_source = data->bss_source; |
eb142608 | 2269 | |
97f8df4d BB |
2270 | switch (data->bss_source) { |
2271 | case BSS_SOURCE_MBSSID: | |
eb142608 | 2272 | tmp.pub.transmitted_bss = data->source_bss; |
97f8df4d BB |
2273 | fallthrough; |
2274 | case BSS_SOURCE_STA_PROFILE: | |
eb142608 BB |
2275 | ts = bss_from_pub(data->source_bss)->ts; |
2276 | tmp.pub.bssid_index = data->bssid_index; | |
2277 | tmp.pub.max_bssid_indicator = data->max_bssid_indicator; | |
97f8df4d BB |
2278 | break; |
2279 | case BSS_SOURCE_DIRECT: | |
60d7dfea | 2280 | ts = jiffies; |
c2edd301 BB |
2281 | |
2282 | if (channel->band == NL80211_BAND_60GHZ) { | |
eb142608 BB |
2283 | bss_type = data->capability & |
2284 | WLAN_CAPABILITY_DMG_TYPE_MASK; | |
c2edd301 BB |
2285 | if (bss_type == WLAN_CAPABILITY_DMG_TYPE_AP || |
2286 | bss_type == WLAN_CAPABILITY_DMG_TYPE_PBSS) | |
2287 | regulatory_hint_found_beacon(wiphy, channel, | |
2288 | gfp); | |
2289 | } else { | |
eb142608 | 2290 | if (data->capability & WLAN_CAPABILITY_ESS) |
c2edd301 BB |
2291 | regulatory_hint_found_beacon(wiphy, channel, |
2292 | gfp); | |
2293 | } | |
97f8df4d | 2294 | break; |
0cd01efb | 2295 | } |
6e19bc4b | 2296 | |
34a6eddb | 2297 | /* |
5bc8c1f2 | 2298 | * If we do not know here whether the IEs are from a Beacon or Probe |
34a6eddb JM |
2299 | * Response frame, we need to pick one of the options and only use it |
2300 | * with the driver that does not provide the full Beacon/Probe Response | |
2301 | * frame. Use Beacon frame pointer to avoid indicating that this should | |
50521aa8 | 2302 | * override the IEs pointer should we have received an earlier |
9caf0364 | 2303 | * indication of Probe Response data. |
34a6eddb | 2304 | */ |
eb142608 | 2305 | ies = kzalloc(sizeof(*ies) + data->ielen, gfp); |
9caf0364 JB |
2306 | if (!ies) |
2307 | return NULL; | |
eb142608 BB |
2308 | ies->len = data->ielen; |
2309 | ies->tsf = data->tsf; | |
0e227084 | 2310 | ies->from_beacon = false; |
eb142608 | 2311 | memcpy(ies->data, data->ie, data->ielen); |
06aa7afa | 2312 | |
eb142608 | 2313 | switch (data->ftype) { |
5bc8c1f2 | 2314 | case CFG80211_BSS_FTYPE_BEACON: |
7e899c1d | 2315 | case CFG80211_BSS_FTYPE_S1G_BEACON: |
5bc8c1f2 | 2316 | ies->from_beacon = true; |
7b506ff6 | 2317 | fallthrough; |
5bc8c1f2 JB |
2318 | case CFG80211_BSS_FTYPE_UNKNOWN: |
2319 | rcu_assign_pointer(tmp.pub.beacon_ies, ies); | |
2320 | break; | |
2321 | case CFG80211_BSS_FTYPE_PRESP: | |
2322 | rcu_assign_pointer(tmp.pub.proberesp_ies, ies); | |
2323 | break; | |
2324 | } | |
9caf0364 | 2325 | rcu_assign_pointer(tmp.pub.ies, ies); |
06aa7afa | 2326 | |
eb142608 | 2327 | signal_valid = drv_data->chan == channel; |
6b7c93c1 BB |
2328 | spin_lock_bh(&rdev->bss_lock); |
2329 | res = __cfg80211_bss_update(rdev, &tmp, signal_valid, ts); | |
06aa7afa | 2330 | if (!res) |
6b7c93c1 | 2331 | goto drop; |
06aa7afa | 2332 | |
3e3929ef | 2333 | rdev_inform_bss(rdev, &res->pub, ies, drv_data->drv_data); |
5db25290 | 2334 | |
2481b5da | 2335 | if (data->bss_source == BSS_SOURCE_MBSSID) { |
0b8fb823 PX |
2336 | /* this is a nontransmitting bss, we need to add it to |
2337 | * transmitting bss' list if it is not there | |
2338 | */ | |
eb142608 | 2339 | if (cfg80211_add_nontrans_list(data->source_bss, &res->pub)) { |
0b780881 | 2340 | if (__cfg80211_unlink_bss(rdev, res)) { |
0b8fb823 | 2341 | rdev->bss_generation++; |
0b780881 JB |
2342 | res = NULL; |
2343 | } | |
0b8fb823 | 2344 | } |
0b780881 JB |
2345 | |
2346 | if (!res) | |
6b7c93c1 | 2347 | goto drop; |
0b8fb823 | 2348 | } |
6b7c93c1 | 2349 | spin_unlock_bh(&rdev->bss_lock); |
0b8fb823 | 2350 | |
4ee3e063 | 2351 | trace_cfg80211_return_bss(&res->pub); |
6b7c93c1 | 2352 | /* __cfg80211_bss_update gives us a referenced result */ |
06aa7afa | 2353 | return &res->pub; |
6b7c93c1 BB |
2354 | |
2355 | drop: | |
2356 | spin_unlock_bh(&rdev->bss_lock); | |
2357 | return NULL; | |
06aa7afa | 2358 | } |
06aa7afa | 2359 | |
fe806e49 SS |
2360 | static const struct element |
2361 | *cfg80211_get_profile_continuation(const u8 *ie, size_t ielen, | |
2362 | const struct element *mbssid_elem, | |
2363 | const struct element *sub_elem) | |
2364 | { | |
2365 | const u8 *mbssid_end = mbssid_elem->data + mbssid_elem->datalen; | |
2366 | const struct element *next_mbssid; | |
2367 | const struct element *next_sub; | |
2368 | ||
2369 | next_mbssid = cfg80211_find_elem(WLAN_EID_MULTIPLE_BSSID, | |
2370 | mbssid_end, | |
2371 | ielen - (mbssid_end - ie)); | |
2372 | ||
2373 | /* | |
8cf5c86d | 2374 | * If it is not the last subelement in current MBSSID IE or there isn't |
fe806e49 SS |
2375 | * a next MBSSID IE - profile is complete. |
2376 | */ | |
2377 | if ((sub_elem->data + sub_elem->datalen < mbssid_end - 1) || | |
2378 | !next_mbssid) | |
2379 | return NULL; | |
2380 | ||
2381 | /* For any length error, just return NULL */ | |
2382 | ||
2383 | if (next_mbssid->datalen < 4) | |
2384 | return NULL; | |
2385 | ||
2386 | next_sub = (void *)&next_mbssid->data[1]; | |
2387 | ||
2388 | if (next_mbssid->data + next_mbssid->datalen < | |
2389 | next_sub->data + next_sub->datalen) | |
2390 | return NULL; | |
2391 | ||
2392 | if (next_sub->id != 0 || next_sub->datalen < 2) | |
2393 | return NULL; | |
2394 | ||
2395 | /* | |
2396 | * Check if the first element in the next sub element is a start | |
2397 | * of a new profile | |
2398 | */ | |
2399 | return next_sub->data[0] == WLAN_EID_NON_TX_BSSID_CAP ? | |
2400 | NULL : next_mbssid; | |
2401 | } | |
2402 | ||
2403 | size_t cfg80211_merge_profile(const u8 *ie, size_t ielen, | |
2404 | const struct element *mbssid_elem, | |
2405 | const struct element *sub_elem, | |
5809a5d5 | 2406 | u8 *merged_ie, size_t max_copy_len) |
fe806e49 SS |
2407 | { |
2408 | size_t copied_len = sub_elem->datalen; | |
2409 | const struct element *next_mbssid; | |
2410 | ||
2411 | if (sub_elem->datalen > max_copy_len) | |
2412 | return 0; | |
2413 | ||
5809a5d5 | 2414 | memcpy(merged_ie, sub_elem->data, sub_elem->datalen); |
fe806e49 SS |
2415 | |
2416 | while ((next_mbssid = cfg80211_get_profile_continuation(ie, ielen, | |
2417 | mbssid_elem, | |
2418 | sub_elem))) { | |
2419 | const struct element *next_sub = (void *)&next_mbssid->data[1]; | |
2420 | ||
2421 | if (copied_len + next_sub->datalen > max_copy_len) | |
2422 | break; | |
5809a5d5 | 2423 | memcpy(merged_ie + copied_len, next_sub->data, |
fe806e49 SS |
2424 | next_sub->datalen); |
2425 | copied_len += next_sub->datalen; | |
2426 | } | |
2427 | ||
2428 | return copied_len; | |
2429 | } | |
2430 | EXPORT_SYMBOL(cfg80211_merge_profile); | |
2431 | ||
eb142608 BB |
2432 | static void |
2433 | cfg80211_parse_mbssid_data(struct wiphy *wiphy, | |
2434 | struct cfg80211_inform_single_bss_data *tx_data, | |
2435 | struct cfg80211_bss *source_bss, | |
2436 | gfp_t gfp) | |
0b8fb823 | 2437 | { |
eb142608 BB |
2438 | struct cfg80211_inform_single_bss_data data = { |
2439 | .drv_data = tx_data->drv_data, | |
2440 | .ftype = tx_data->ftype, | |
2441 | .tsf = tx_data->tsf, | |
2442 | .beacon_interval = tx_data->beacon_interval, | |
2443 | .source_bss = source_bss, | |
2481b5da | 2444 | .bss_source = BSS_SOURCE_MBSSID, |
d02a12b8 JB |
2445 | .use_for = tx_data->use_for, |
2446 | .cannot_use_reasons = tx_data->cannot_use_reasons, | |
eb142608 | 2447 | }; |
1c8745f3 JB |
2448 | const u8 *mbssid_index_ie; |
2449 | const struct element *elem, *sub; | |
fe806e49 SS |
2450 | u8 *new_ie, *profile; |
2451 | u64 seen_indices = 0; | |
0b8fb823 PX |
2452 | struct cfg80211_bss *bss; |
2453 | ||
eb142608 | 2454 | if (!source_bss) |
0b8fb823 | 2455 | return; |
eb142608 BB |
2456 | if (!cfg80211_find_elem(WLAN_EID_MULTIPLE_BSSID, |
2457 | tx_data->ie, tx_data->ielen)) | |
0b8fb823 | 2458 | return; |
213ed579 SS |
2459 | if (!wiphy->support_mbssid) |
2460 | return; | |
2461 | if (wiphy->support_only_he_mbssid && | |
eb142608 BB |
2462 | !cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, |
2463 | tx_data->ie, tx_data->ielen)) | |
213ed579 | 2464 | return; |
0b8fb823 | 2465 | |
0b8fb823 PX |
2466 | new_ie = kmalloc(IEEE80211_MAX_DATA_LEN, gfp); |
2467 | if (!new_ie) | |
2468 | return; | |
2469 | ||
eb142608 | 2470 | profile = kmalloc(tx_data->ielen, gfp); |
fe806e49 SS |
2471 | if (!profile) |
2472 | goto out; | |
2473 | ||
eb142608 BB |
2474 | for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, |
2475 | tx_data->ie, tx_data->ielen) { | |
1c8745f3 JB |
2476 | if (elem->datalen < 4) |
2477 | continue; | |
8f033d2b JB |
2478 | if (elem->data[0] < 1 || (int)elem->data[0] > 8) |
2479 | continue; | |
1c8745f3 | 2480 | for_each_element(sub, elem->data + 1, elem->datalen - 1) { |
fe806e49 SS |
2481 | u8 profile_len; |
2482 | ||
1c8745f3 | 2483 | if (sub->id != 0 || sub->datalen < 4) { |
0b8fb823 PX |
2484 | /* not a valid BSS profile */ |
2485 | continue; | |
2486 | } | |
2487 | ||
1c8745f3 JB |
2488 | if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP || |
2489 | sub->data[1] != 2) { | |
0b8fb823 PX |
2490 | /* The first element within the Nontransmitted |
2491 | * BSSID Profile is not the Nontransmitted | |
2492 | * BSSID Capability element. | |
2493 | */ | |
2494 | continue; | |
2495 | } | |
2496 | ||
eb142608 BB |
2497 | memset(profile, 0, tx_data->ielen); |
2498 | profile_len = cfg80211_merge_profile(tx_data->ie, | |
2499 | tx_data->ielen, | |
fe806e49 SS |
2500 | elem, |
2501 | sub, | |
5809a5d5 | 2502 | profile, |
eb142608 | 2503 | tx_data->ielen); |
fe806e49 | 2504 | |
0b8fb823 PX |
2505 | /* found a Nontransmitted BSSID Profile */ |
2506 | mbssid_index_ie = cfg80211_find_ie | |
2507 | (WLAN_EID_MULTI_BSSID_IDX, | |
fe806e49 | 2508 | profile, profile_len); |
0b8fb823 | 2509 | if (!mbssid_index_ie || mbssid_index_ie[1] < 1 || |
fe806e49 | 2510 | mbssid_index_ie[2] == 0 || |
c7378d7d BB |
2511 | mbssid_index_ie[2] > 46 || |
2512 | mbssid_index_ie[2] >= (1 << elem->data[0])) { | |
0b8fb823 PX |
2513 | /* No valid Multiple BSSID-Index element */ |
2514 | continue; | |
2515 | } | |
2516 | ||
ebb3ca3b | 2517 | if (seen_indices & BIT_ULL(mbssid_index_ie[2])) |
fe806e49 SS |
2518 | /* We don't support legacy split of a profile */ |
2519 | net_dbg_ratelimited("Partial info for BSSID index %d\n", | |
2520 | mbssid_index_ie[2]); | |
2521 | ||
ebb3ca3b | 2522 | seen_indices |= BIT_ULL(mbssid_index_ie[2]); |
fe806e49 | 2523 | |
eb142608 BB |
2524 | data.bssid_index = mbssid_index_ie[2]; |
2525 | data.max_bssid_indicator = elem->data[0]; | |
2526 | ||
2527 | cfg80211_gen_new_bssid(tx_data->bssid, | |
2528 | data.max_bssid_indicator, | |
2529 | data.bssid_index, | |
2530 | data.bssid); | |
0cd01efb | 2531 | |
0b8fb823 | 2532 | memset(new_ie, 0, IEEE80211_MAX_DATA_LEN); |
eb142608 BB |
2533 | data.ie = new_ie; |
2534 | data.ielen = cfg80211_gen_new_ie(tx_data->ie, | |
2535 | tx_data->ielen, | |
fe806e49 | 2536 | profile, |
eb142608 BB |
2537 | profile_len, |
2538 | new_ie, | |
dfd9aa3e | 2539 | IEEE80211_MAX_DATA_LEN); |
eb142608 | 2540 | if (!data.ielen) |
0b8fb823 PX |
2541 | continue; |
2542 | ||
eb142608 BB |
2543 | data.capability = get_unaligned_le16(profile + 2); |
2544 | bss = cfg80211_inform_single_bss_data(wiphy, &data, gfp); | |
0b8fb823 PX |
2545 | if (!bss) |
2546 | break; | |
2547 | cfg80211_put_bss(wiphy, bss); | |
2548 | } | |
0b8fb823 PX |
2549 | } |
2550 | ||
fe806e49 | 2551 | out: |
0b8fb823 | 2552 | kfree(new_ie); |
fe806e49 | 2553 | kfree(profile); |
0b8fb823 PX |
2554 | } |
2555 | ||
f837a653 BB |
2556 | ssize_t cfg80211_defragment_element(const struct element *elem, const u8 *ies, |
2557 | size_t ieslen, u8 *data, size_t data_len, | |
2558 | u8 frag_id) | |
2559 | { | |
2560 | const struct element *next; | |
2561 | ssize_t copied; | |
2562 | u8 elem_datalen; | |
2563 | ||
2564 | if (!elem) | |
2565 | return -EINVAL; | |
2566 | ||
2567 | /* elem might be invalid after the memmove */ | |
2568 | next = (void *)(elem->data + elem->datalen); | |
f837a653 | 2569 | elem_datalen = elem->datalen; |
43125539 | 2570 | |
f837a653 BB |
2571 | if (elem->id == WLAN_EID_EXTENSION) { |
2572 | copied = elem->datalen - 1; | |
f837a653 | 2573 | |
8ade3356 JB |
2574 | if (data) { |
2575 | if (copied > data_len) | |
2576 | return -ENOSPC; | |
2577 | ||
2578 | memmove(data, elem->data + 1, copied); | |
2579 | } | |
f837a653 BB |
2580 | } else { |
2581 | copied = elem->datalen; | |
f837a653 | 2582 | |
8ade3356 JB |
2583 | if (data) { |
2584 | if (copied > data_len) | |
2585 | return -ENOSPC; | |
2586 | ||
2587 | memmove(data, elem->data, copied); | |
2588 | } | |
f837a653 BB |
2589 | } |
2590 | ||
2591 | /* Fragmented elements must have 255 bytes */ | |
2592 | if (elem_datalen < 255) | |
2593 | return copied; | |
2594 | ||
2595 | for (elem = next; | |
2596 | elem->data < ies + ieslen && | |
43125539 | 2597 | elem->data + elem->datalen <= ies + ieslen; |
f837a653 BB |
2598 | elem = next) { |
2599 | /* elem might be invalid after the memmove */ | |
2600 | next = (void *)(elem->data + elem->datalen); | |
2601 | ||
2602 | if (elem->id != frag_id) | |
2603 | break; | |
2604 | ||
2605 | elem_datalen = elem->datalen; | |
2606 | ||
8ade3356 JB |
2607 | if (data) { |
2608 | if (copied + elem_datalen > data_len) | |
2609 | return -ENOSPC; | |
2610 | ||
2611 | memmove(data + copied, elem->data, elem_datalen); | |
2612 | } | |
f837a653 | 2613 | |
f837a653 BB |
2614 | copied += elem_datalen; |
2615 | ||
2616 | /* Only the last fragment may be short */ | |
2617 | if (elem_datalen != 255) | |
2618 | break; | |
2619 | } | |
2620 | ||
2621 | return copied; | |
2622 | } | |
2623 | EXPORT_SYMBOL(cfg80211_defragment_element); | |
2624 | ||
2481b5da BB |
2625 | struct cfg80211_mle { |
2626 | struct ieee80211_multi_link_elem *mle; | |
2627 | struct ieee80211_mle_per_sta_profile | |
2628 | *sta_prof[IEEE80211_MLD_MAX_NUM_LINKS]; | |
2629 | ssize_t sta_prof_len[IEEE80211_MLD_MAX_NUM_LINKS]; | |
2630 | ||
2631 | u8 data[]; | |
2632 | }; | |
2633 | ||
2634 | static struct cfg80211_mle * | |
2635 | cfg80211_defrag_mle(const struct element *mle, const u8 *ie, size_t ielen, | |
2636 | gfp_t gfp) | |
2637 | { | |
2638 | const struct element *elem; | |
2639 | struct cfg80211_mle *res; | |
2640 | size_t buf_len; | |
2641 | ssize_t mle_len; | |
2642 | u8 common_size, idx; | |
2643 | ||
2644 | if (!mle || !ieee80211_mle_size_ok(mle->data + 1, mle->datalen - 1)) | |
2645 | return NULL; | |
2646 | ||
2647 | /* Required length for first defragmentation */ | |
2648 | buf_len = mle->datalen - 1; | |
2649 | for_each_element(elem, mle->data + mle->datalen, | |
2650 | ielen - sizeof(*mle) + mle->datalen) { | |
2651 | if (elem->id != WLAN_EID_FRAGMENT) | |
2652 | break; | |
2653 | ||
2654 | buf_len += elem->datalen; | |
2655 | } | |
2656 | ||
2657 | res = kzalloc(struct_size(res, data, buf_len), gfp); | |
2658 | if (!res) | |
2659 | return NULL; | |
2660 | ||
2661 | mle_len = cfg80211_defragment_element(mle, ie, ielen, | |
2662 | res->data, buf_len, | |
2663 | WLAN_EID_FRAGMENT); | |
2664 | if (mle_len < 0) | |
2665 | goto error; | |
2666 | ||
2667 | res->mle = (void *)res->data; | |
2668 | ||
2669 | /* Find the sub-element area in the buffer */ | |
2670 | common_size = ieee80211_mle_common_size((u8 *)res->mle); | |
2671 | ie = res->data + common_size; | |
2672 | ielen = mle_len - common_size; | |
2673 | ||
2674 | idx = 0; | |
2675 | for_each_element_id(elem, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, | |
2676 | ie, ielen) { | |
2677 | res->sta_prof[idx] = (void *)elem->data; | |
2678 | res->sta_prof_len[idx] = elem->datalen; | |
2679 | ||
2680 | idx++; | |
2681 | if (idx >= IEEE80211_MLD_MAX_NUM_LINKS) | |
2682 | break; | |
2683 | } | |
2684 | if (!for_each_element_completed(elem, ie, ielen)) | |
2685 | goto error; | |
2686 | ||
2687 | /* Defragment sta_info in-place */ | |
2688 | for (idx = 0; idx < IEEE80211_MLD_MAX_NUM_LINKS && res->sta_prof[idx]; | |
2689 | idx++) { | |
2690 | if (res->sta_prof_len[idx] < 255) | |
2691 | continue; | |
2692 | ||
2693 | elem = (void *)res->sta_prof[idx] - 2; | |
2694 | ||
2695 | if (idx + 1 < ARRAY_SIZE(res->sta_prof) && | |
2696 | res->sta_prof[idx + 1]) | |
2697 | buf_len = (u8 *)res->sta_prof[idx + 1] - | |
2698 | (u8 *)res->sta_prof[idx]; | |
2699 | else | |
2700 | buf_len = ielen + ie - (u8 *)elem; | |
2701 | ||
2702 | res->sta_prof_len[idx] = | |
2703 | cfg80211_defragment_element(elem, | |
2704 | (u8 *)elem, buf_len, | |
2705 | (u8 *)res->sta_prof[idx], | |
2706 | buf_len, | |
2707 | IEEE80211_MLE_SUBELEM_FRAGMENT); | |
2708 | if (res->sta_prof_len[idx] < 0) | |
2709 | goto error; | |
2710 | } | |
2711 | ||
2712 | return res; | |
2713 | ||
2714 | error: | |
2715 | kfree(res); | |
2716 | return NULL; | |
2717 | } | |
2718 | ||
6b756efc JB |
2719 | struct tbtt_info_iter_data { |
2720 | const struct ieee80211_neighbor_ap_info *ap_info; | |
2721 | u8 param_ch_count; | |
2722 | u32 use_for; | |
2723 | u8 mld_id, link_id; | |
97f8df4d | 2724 | bool non_tx; |
6b756efc | 2725 | }; |
2481b5da | 2726 | |
6b756efc JB |
2727 | static enum cfg80211_rnr_iter_ret |
2728 | cfg802121_mld_ap_rnr_iter(void *_data, u8 type, | |
2729 | const struct ieee80211_neighbor_ap_info *info, | |
2730 | const u8 *tbtt_info, u8 tbtt_info_len) | |
2731 | { | |
2732 | const struct ieee80211_rnr_mld_params *mld_params; | |
2733 | struct tbtt_info_iter_data *data = _data; | |
2734 | u8 link_id; | |
97f8df4d | 2735 | bool non_tx = false; |
6b756efc JB |
2736 | |
2737 | if (type == IEEE80211_TBTT_INFO_TYPE_TBTT && | |
2738 | tbtt_info_len >= offsetofend(struct ieee80211_tbtt_info_ge_11, | |
97f8df4d BB |
2739 | mld_params)) { |
2740 | const struct ieee80211_tbtt_info_ge_11 *tbtt_info_ge_11 = | |
2741 | (void *)tbtt_info; | |
2742 | ||
2743 | non_tx = (tbtt_info_ge_11->bss_params & | |
2744 | (IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID | | |
2745 | IEEE80211_RNR_TBTT_PARAMS_TRANSMITTED_BSSID)) == | |
2746 | IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID; | |
2747 | mld_params = &tbtt_info_ge_11->mld_params; | |
2748 | } else if (type == IEEE80211_TBTT_INFO_TYPE_MLD && | |
6b756efc JB |
2749 | tbtt_info_len >= sizeof(struct ieee80211_rnr_mld_params)) |
2750 | mld_params = (void *)tbtt_info; | |
2751 | else | |
2752 | return RNR_ITER_CONTINUE; | |
2481b5da | 2753 | |
6b756efc JB |
2754 | link_id = le16_get_bits(mld_params->params, |
2755 | IEEE80211_RNR_MLD_PARAMS_LINK_ID); | |
2481b5da | 2756 | |
6b756efc JB |
2757 | if (data->mld_id != mld_params->mld_id) |
2758 | return RNR_ITER_CONTINUE; | |
2481b5da | 2759 | |
6b756efc JB |
2760 | if (data->link_id != link_id) |
2761 | return RNR_ITER_CONTINUE; | |
2481b5da | 2762 | |
6b756efc JB |
2763 | data->ap_info = info; |
2764 | data->param_ch_count = | |
2765 | le16_get_bits(mld_params->params, | |
2766 | IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); | |
97f8df4d | 2767 | data->non_tx = non_tx; |
2481b5da | 2768 | |
6b756efc JB |
2769 | if (type == IEEE80211_TBTT_INFO_TYPE_TBTT) |
2770 | data->use_for = NL80211_BSS_USE_FOR_ALL; | |
2771 | else | |
2772 | data->use_for = NL80211_BSS_USE_FOR_MLD_LINK; | |
2773 | return RNR_ITER_BREAK; | |
2774 | } | |
2481b5da | 2775 | |
6b756efc JB |
2776 | static u8 |
2777 | cfg80211_rnr_info_for_mld_ap(const u8 *ie, size_t ielen, u8 mld_id, u8 link_id, | |
2778 | const struct ieee80211_neighbor_ap_info **ap_info, | |
97f8df4d | 2779 | u8 *param_ch_count, bool *non_tx) |
6b756efc JB |
2780 | { |
2781 | struct tbtt_info_iter_data data = { | |
2782 | .mld_id = mld_id, | |
2783 | .link_id = link_id, | |
2784 | }; | |
2481b5da | 2785 | |
6b756efc | 2786 | cfg80211_iter_rnr(ie, ielen, cfg802121_mld_ap_rnr_iter, &data); |
2481b5da | 2787 | |
6b756efc JB |
2788 | *ap_info = data.ap_info; |
2789 | *param_ch_count = data.param_ch_count; | |
97f8df4d | 2790 | *non_tx = data.non_tx; |
2481b5da | 2791 | |
6b756efc | 2792 | return data.use_for; |
2481b5da BB |
2793 | } |
2794 | ||
4d1d6b3f BB |
2795 | static struct element * |
2796 | cfg80211_gen_reporter_rnr(struct cfg80211_bss *source_bss, bool is_mbssid, | |
2797 | bool same_mld, u8 link_id, u8 bss_change_count, | |
2798 | gfp_t gfp) | |
2799 | { | |
2800 | const struct cfg80211_bss_ies *ies; | |
2801 | struct ieee80211_neighbor_ap_info ap_info; | |
2802 | struct ieee80211_tbtt_info_ge_11 tbtt_info; | |
2803 | u32 short_ssid; | |
2804 | const struct element *elem; | |
2805 | struct element *res; | |
2806 | ||
2807 | /* | |
2808 | * We only generate the RNR to permit ML lookups. For that we do not | |
2809 | * need an entry for the corresponding transmitting BSS, lets just skip | |
2810 | * it even though it would be easy to add. | |
2811 | */ | |
2812 | if (!same_mld) | |
2813 | return NULL; | |
2814 | ||
2815 | /* We could use tx_data->ies if we change cfg80211_calc_short_ssid */ | |
2816 | rcu_read_lock(); | |
2817 | ies = rcu_dereference(source_bss->ies); | |
2818 | ||
2819 | ap_info.tbtt_info_len = offsetofend(typeof(tbtt_info), mld_params); | |
2820 | ap_info.tbtt_info_hdr = | |
2821 | u8_encode_bits(IEEE80211_TBTT_INFO_TYPE_TBTT, | |
2822 | IEEE80211_AP_INFO_TBTT_HDR_TYPE) | | |
2823 | u8_encode_bits(0, IEEE80211_AP_INFO_TBTT_HDR_COUNT); | |
2824 | ||
2825 | ap_info.channel = ieee80211_frequency_to_channel(source_bss->channel->center_freq); | |
2826 | ||
2827 | /* operating class */ | |
2828 | elem = cfg80211_find_elem(WLAN_EID_SUPPORTED_REGULATORY_CLASSES, | |
2829 | ies->data, ies->len); | |
2830 | if (elem && elem->datalen >= 1) { | |
2831 | ap_info.op_class = elem->data[0]; | |
2832 | } else { | |
2833 | struct cfg80211_chan_def chandef; | |
2834 | ||
2835 | /* The AP is not providing us with anything to work with. So | |
2836 | * make up a somewhat reasonable operating class, but don't | |
2837 | * bother with it too much as no one will ever use the | |
2838 | * information. | |
2839 | */ | |
2840 | cfg80211_chandef_create(&chandef, source_bss->channel, | |
2841 | NL80211_CHAN_NO_HT); | |
2842 | ||
2843 | if (!ieee80211_chandef_to_operating_class(&chandef, | |
2844 | &ap_info.op_class)) | |
2845 | goto out_unlock; | |
2846 | } | |
2847 | ||
2848 | /* Just set TBTT offset and PSD 20 to invalid/unknown */ | |
2849 | tbtt_info.tbtt_offset = 255; | |
2850 | tbtt_info.psd_20 = IEEE80211_RNR_TBTT_PARAMS_PSD_RESERVED; | |
2851 | ||
2852 | memcpy(tbtt_info.bssid, source_bss->bssid, ETH_ALEN); | |
2853 | if (cfg80211_calc_short_ssid(ies, &elem, &short_ssid)) | |
2854 | goto out_unlock; | |
2855 | ||
2856 | rcu_read_unlock(); | |
2857 | ||
2858 | tbtt_info.short_ssid = cpu_to_le32(short_ssid); | |
2859 | ||
2860 | tbtt_info.bss_params = IEEE80211_RNR_TBTT_PARAMS_SAME_SSID; | |
2861 | ||
2862 | if (is_mbssid) { | |
2863 | tbtt_info.bss_params |= IEEE80211_RNR_TBTT_PARAMS_MULTI_BSSID; | |
2864 | tbtt_info.bss_params |= IEEE80211_RNR_TBTT_PARAMS_TRANSMITTED_BSSID; | |
2865 | } | |
2866 | ||
2867 | tbtt_info.mld_params.mld_id = 0; | |
2868 | tbtt_info.mld_params.params = | |
2869 | le16_encode_bits(link_id, IEEE80211_RNR_MLD_PARAMS_LINK_ID) | | |
2870 | le16_encode_bits(bss_change_count, | |
2871 | IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); | |
2872 | ||
2873 | res = kzalloc(struct_size(res, data, | |
2874 | sizeof(ap_info) + ap_info.tbtt_info_len), | |
2875 | gfp); | |
2876 | if (!res) | |
2877 | return NULL; | |
2878 | ||
2879 | /* Copy the data */ | |
2880 | res->id = WLAN_EID_REDUCED_NEIGHBOR_REPORT; | |
2881 | res->datalen = sizeof(ap_info) + ap_info.tbtt_info_len; | |
2882 | memcpy(res->data, &ap_info, sizeof(ap_info)); | |
2883 | memcpy(res->data + sizeof(ap_info), &tbtt_info, ap_info.tbtt_info_len); | |
2884 | ||
2885 | return res; | |
2886 | ||
2887 | out_unlock: | |
2888 | rcu_read_unlock(); | |
2889 | return NULL; | |
2890 | } | |
2891 | ||
d18125b6 BB |
2892 | static void |
2893 | cfg80211_parse_ml_elem_sta_data(struct wiphy *wiphy, | |
2894 | struct cfg80211_inform_single_bss_data *tx_data, | |
2895 | struct cfg80211_bss *source_bss, | |
2896 | const struct element *elem, | |
2897 | gfp_t gfp) | |
2481b5da BB |
2898 | { |
2899 | struct cfg80211_inform_single_bss_data data = { | |
2900 | .drv_data = tx_data->drv_data, | |
2901 | .ftype = tx_data->ftype, | |
2902 | .source_bss = source_bss, | |
2903 | .bss_source = BSS_SOURCE_STA_PROFILE, | |
2904 | }; | |
4d1d6b3f | 2905 | struct element *reporter_rnr = NULL; |
2481b5da | 2906 | struct ieee80211_multi_link_elem *ml_elem; |
2481b5da | 2907 | struct cfg80211_mle *mle; |
450732ab VJ |
2908 | const struct element *ssid_elem; |
2909 | const u8 *ssid = NULL; | |
2910 | size_t ssid_len = 0; | |
2481b5da | 2911 | u16 control; |
5f478adf | 2912 | u8 ml_common_len; |
4d1d6b3f | 2913 | u8 *new_ie = NULL; |
2481b5da | 2914 | struct cfg80211_bss *bss; |
4d1d6b3f | 2915 | u8 mld_id, reporter_link_id, bss_change_count; |
2481b5da | 2916 | u16 seen_links = 0; |
2481b5da BB |
2917 | u8 i; |
2918 | ||
894dd84e JB |
2919 | if (!ieee80211_mle_type_ok(elem->data + 1, |
2920 | IEEE80211_ML_CONTROL_TYPE_BASIC, | |
2921 | elem->datalen - 1)) | |
2481b5da BB |
2922 | return; |
2923 | ||
894dd84e | 2924 | ml_elem = (void *)(elem->data + 1); |
2481b5da | 2925 | control = le16_to_cpu(ml_elem->control); |
894dd84e | 2926 | ml_common_len = ml_elem->variable[0]; |
2481b5da BB |
2927 | |
2928 | /* Must be present when transmitted by an AP (in a probe response) */ | |
2929 | if (!(control & IEEE80211_MLC_BASIC_PRES_BSS_PARAM_CH_CNT) || | |
2930 | !(control & IEEE80211_MLC_BASIC_PRES_LINK_ID) || | |
2931 | !(control & IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP)) | |
2932 | return; | |
2933 | ||
894dd84e JB |
2934 | reporter_link_id = ieee80211_mle_get_link_id(elem->data + 1); |
2935 | bss_change_count = ieee80211_mle_get_bss_param_ch_cnt(elem->data + 1); | |
2481b5da | 2936 | |
2a0698f8 BB |
2937 | /* |
2938 | * The MLD ID of the reporting AP is always zero. It is set if the AP | |
2939 | * is part of an MBSSID set and will be non-zero for ML Elements | |
2940 | * relating to a nontransmitted BSS (matching the Multi-BSSID Index, | |
2941 | * Draft P802.11be_D3.2, 35.3.4.2) | |
2481b5da | 2942 | */ |
894dd84e | 2943 | mld_id = ieee80211_mle_get_mld_id(elem->data + 1); |
2481b5da BB |
2944 | |
2945 | /* Fully defrag the ML element for sta information/profile iteration */ | |
2946 | mle = cfg80211_defrag_mle(elem, tx_data->ie, tx_data->ielen, gfp); | |
2947 | if (!mle) | |
2948 | return; | |
2949 | ||
4d1d6b3f BB |
2950 | /* No point in doing anything if there is no per-STA profile */ |
2951 | if (!mle->sta_prof[0]) | |
2952 | goto out; | |
2953 | ||
2481b5da BB |
2954 | new_ie = kmalloc(IEEE80211_MAX_DATA_LEN, gfp); |
2955 | if (!new_ie) | |
2956 | goto out; | |
2957 | ||
4d1d6b3f BB |
2958 | reporter_rnr = cfg80211_gen_reporter_rnr(source_bss, |
2959 | u16_get_bits(control, | |
2960 | IEEE80211_MLC_BASIC_PRES_MLD_ID), | |
2961 | mld_id == 0, reporter_link_id, | |
2962 | bss_change_count, | |
2963 | gfp); | |
2964 | ||
450732ab VJ |
2965 | ssid_elem = cfg80211_find_elem(WLAN_EID_SSID, tx_data->ie, |
2966 | tx_data->ielen); | |
2967 | if (ssid_elem) { | |
2968 | ssid = ssid_elem->data; | |
2969 | ssid_len = ssid_elem->datalen; | |
2970 | } | |
2971 | ||
2481b5da BB |
2972 | for (i = 0; i < ARRAY_SIZE(mle->sta_prof) && mle->sta_prof[i]; i++) { |
2973 | const struct ieee80211_neighbor_ap_info *ap_info; | |
2974 | enum nl80211_band band; | |
2975 | u32 freq; | |
2976 | const u8 *profile; | |
2481b5da | 2977 | ssize_t profile_len; |
f8599d63 | 2978 | u8 param_ch_count; |
d02a12b8 | 2979 | u8 link_id, use_for; |
97f8df4d | 2980 | bool non_tx; |
2481b5da BB |
2981 | |
2982 | if (!ieee80211_mle_basic_sta_prof_size_ok((u8 *)mle->sta_prof[i], | |
2983 | mle->sta_prof_len[i])) | |
2984 | continue; | |
2985 | ||
2986 | control = le16_to_cpu(mle->sta_prof[i]->control); | |
2987 | ||
2988 | if (!(control & IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE)) | |
2989 | continue; | |
2990 | ||
2991 | link_id = u16_get_bits(control, | |
2992 | IEEE80211_MLE_STA_CONTROL_LINK_ID); | |
2993 | if (seen_links & BIT(link_id)) | |
2994 | break; | |
2995 | seen_links |= BIT(link_id); | |
2996 | ||
2997 | if (!(control & IEEE80211_MLE_STA_CONTROL_BEACON_INT_PRESENT) || | |
2998 | !(control & IEEE80211_MLE_STA_CONTROL_TSF_OFFS_PRESENT) || | |
2999 | !(control & IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT)) | |
3000 | continue; | |
3001 | ||
3002 | memcpy(data.bssid, mle->sta_prof[i]->variable, ETH_ALEN); | |
3003 | data.beacon_interval = | |
3004 | get_unaligned_le16(mle->sta_prof[i]->variable + 6); | |
3005 | data.tsf = tx_data->tsf + | |
3006 | get_unaligned_le64(mle->sta_prof[i]->variable + 8); | |
3007 | ||
3008 | /* sta_info_len counts itself */ | |
3009 | profile = mle->sta_prof[i]->variable + | |
3010 | mle->sta_prof[i]->sta_info_len - 1; | |
3011 | profile_len = (u8 *)mle->sta_prof[i] + mle->sta_prof_len[i] - | |
3012 | profile; | |
3013 | ||
3014 | if (profile_len < 2) | |
3015 | continue; | |
3016 | ||
3017 | data.capability = get_unaligned_le16(profile); | |
3018 | profile += 2; | |
3019 | profile_len -= 2; | |
3020 | ||
3021 | /* Find in RNR to look up channel information */ | |
f8599d63 BB |
3022 | use_for = cfg80211_rnr_info_for_mld_ap(tx_data->ie, |
3023 | tx_data->ielen, | |
3024 | mld_id, link_id, | |
3025 | &ap_info, | |
97f8df4d BB |
3026 | ¶m_ch_count, |
3027 | &non_tx); | |
d02a12b8 | 3028 | if (!use_for) |
2481b5da BB |
3029 | continue; |
3030 | ||
97f8df4d BB |
3031 | /* |
3032 | * As of 802.11be_D5.0, the specification does not give us any | |
3033 | * way of discovering both the MaxBSSID and the Multiple-BSSID | |
3034 | * Index. It does seem like the Multiple-BSSID Index element | |
3035 | * may be provided, but section 9.4.2.45 explicitly forbids | |
3036 | * including a Multiple-BSSID Element (in this case without any | |
3037 | * subelements). | |
3038 | * Without both pieces of information we cannot calculate the | |
3039 | * reference BSSID, so simply ignore the BSS. | |
3040 | */ | |
3041 | if (non_tx) | |
3042 | continue; | |
3043 | ||
2481b5da BB |
3044 | /* We could sanity check the BSSID is included */ |
3045 | ||
3046 | if (!ieee80211_operating_class_to_band(ap_info->op_class, | |
3047 | &band)) | |
3048 | continue; | |
3049 | ||
3050 | freq = ieee80211_channel_to_freq_khz(ap_info->channel, band); | |
3051 | data.channel = ieee80211_get_channel_khz(wiphy, freq); | |
3052 | ||
450732ab VJ |
3053 | /* Skip if BSS entry generated from MBSSID or DIRECT source |
3054 | * frame data available already. | |
3055 | */ | |
3056 | bss = cfg80211_get_bss(wiphy, data.channel, data.bssid, ssid, | |
3057 | ssid_len, IEEE80211_BSS_TYPE_ANY, | |
3058 | IEEE80211_PRIVACY_ANY); | |
3059 | if (bss) { | |
3060 | struct cfg80211_internal_bss *ibss = bss_from_pub(bss); | |
3061 | ||
3062 | if (data.capability == bss->capability && | |
3063 | ibss->bss_source != BSS_SOURCE_STA_PROFILE) { | |
3064 | cfg80211_put_bss(wiphy, bss); | |
3065 | continue; | |
3066 | } | |
3067 | cfg80211_put_bss(wiphy, bss); | |
3068 | } | |
3069 | ||
d02a12b8 JB |
3070 | if (use_for == NL80211_BSS_USE_FOR_MLD_LINK && |
3071 | !(wiphy->flags & WIPHY_FLAG_SUPPORTS_NSTR_NONPRIMARY)) { | |
3072 | use_for = 0; | |
3073 | data.cannot_use_reasons = | |
3074 | NL80211_BSS_CANNOT_USE_NSTR_NONPRIMARY; | |
3075 | } | |
3076 | data.use_for = use_for; | |
3077 | ||
2481b5da BB |
3078 | /* Generate new elements */ |
3079 | memset(new_ie, 0, IEEE80211_MAX_DATA_LEN); | |
3080 | data.ie = new_ie; | |
3081 | data.ielen = cfg80211_gen_new_ie(tx_data->ie, tx_data->ielen, | |
3082 | profile, profile_len, | |
3083 | new_ie, | |
3084 | IEEE80211_MAX_DATA_LEN); | |
3085 | if (!data.ielen) | |
3086 | continue; | |
3087 | ||
5f478adf BB |
3088 | /* The generated elements do not contain: |
3089 | * - Basic ML element | |
3090 | * - A TBTT entry in the RNR for the transmitting AP | |
3091 | * | |
3092 | * This information is needed both internally and in userspace | |
3093 | * as such, we should append it here. | |
3094 | */ | |
3095 | if (data.ielen + 3 + sizeof(*ml_elem) + ml_common_len > | |
3096 | IEEE80211_MAX_DATA_LEN) | |
3097 | continue; | |
3098 | ||
3099 | /* Copy the Basic Multi-Link element including the common | |
f8599d63 BB |
3100 | * information, and then fix up the link ID and BSS param |
3101 | * change count. | |
5f478adf BB |
3102 | * Note that the ML element length has been verified and we |
3103 | * also checked that it contains the link ID. | |
3104 | */ | |
3105 | new_ie[data.ielen++] = WLAN_EID_EXTENSION; | |
3106 | new_ie[data.ielen++] = 1 + sizeof(*ml_elem) + ml_common_len; | |
3107 | new_ie[data.ielen++] = WLAN_EID_EXT_EHT_MULTI_LINK; | |
3108 | memcpy(new_ie + data.ielen, ml_elem, | |
3109 | sizeof(*ml_elem) + ml_common_len); | |
3110 | ||
3111 | new_ie[data.ielen + sizeof(*ml_elem) + 1 + ETH_ALEN] = link_id; | |
f8599d63 BB |
3112 | new_ie[data.ielen + sizeof(*ml_elem) + 1 + ETH_ALEN + 1] = |
3113 | param_ch_count; | |
5f478adf BB |
3114 | |
3115 | data.ielen += sizeof(*ml_elem) + ml_common_len; | |
3116 | ||
4d1d6b3f BB |
3117 | if (reporter_rnr && (use_for & NL80211_BSS_USE_FOR_NORMAL)) { |
3118 | if (data.ielen + sizeof(struct element) + | |
3119 | reporter_rnr->datalen > IEEE80211_MAX_DATA_LEN) | |
3120 | continue; | |
3121 | ||
3122 | memcpy(new_ie + data.ielen, reporter_rnr, | |
3123 | sizeof(struct element) + reporter_rnr->datalen); | |
3124 | data.ielen += sizeof(struct element) + | |
3125 | reporter_rnr->datalen; | |
3126 | } | |
5f478adf | 3127 | |
2481b5da BB |
3128 | bss = cfg80211_inform_single_bss_data(wiphy, &data, gfp); |
3129 | if (!bss) | |
3130 | break; | |
3131 | cfg80211_put_bss(wiphy, bss); | |
3132 | } | |
3133 | ||
3134 | out: | |
4d1d6b3f | 3135 | kfree(reporter_rnr); |
2481b5da BB |
3136 | kfree(new_ie); |
3137 | kfree(mle); | |
3138 | } | |
3139 | ||
d18125b6 BB |
3140 | static void cfg80211_parse_ml_sta_data(struct wiphy *wiphy, |
3141 | struct cfg80211_inform_single_bss_data *tx_data, | |
3142 | struct cfg80211_bss *source_bss, | |
3143 | gfp_t gfp) | |
3144 | { | |
3145 | const struct element *elem; | |
3146 | ||
3147 | if (!source_bss) | |
3148 | return; | |
3149 | ||
3150 | if (tx_data->ftype != CFG80211_BSS_FTYPE_PRESP) | |
3151 | return; | |
3152 | ||
3153 | for_each_element_extid(elem, WLAN_EID_EXT_EHT_MULTI_LINK, | |
3154 | tx_data->ie, tx_data->ielen) | |
3155 | cfg80211_parse_ml_elem_sta_data(wiphy, tx_data, source_bss, | |
3156 | elem, gfp); | |
3157 | } | |
3158 | ||
2a519311 | 3159 | struct cfg80211_bss * |
0b8fb823 PX |
3160 | cfg80211_inform_bss_data(struct wiphy *wiphy, |
3161 | struct cfg80211_inform_bss *data, | |
3162 | enum cfg80211_bss_frame_type ftype, | |
3163 | const u8 *bssid, u64 tsf, u16 capability, | |
3164 | u16 beacon_interval, const u8 *ie, size_t ielen, | |
3165 | gfp_t gfp) | |
3166 | { | |
eb142608 BB |
3167 | struct cfg80211_inform_single_bss_data inform_data = { |
3168 | .drv_data = data, | |
3169 | .ftype = ftype, | |
3170 | .tsf = tsf, | |
3171 | .capability = capability, | |
3172 | .beacon_interval = beacon_interval, | |
3173 | .ie = ie, | |
3174 | .ielen = ielen, | |
d02a12b8 JB |
3175 | .use_for = data->restrict_use ? |
3176 | data->use_for : | |
3177 | NL80211_BSS_USE_FOR_ALL, | |
3178 | .cannot_use_reasons = data->cannot_use_reasons, | |
eb142608 | 3179 | }; |
0b8fb823 PX |
3180 | struct cfg80211_bss *res; |
3181 | ||
eb142608 BB |
3182 | memcpy(inform_data.bssid, bssid, ETH_ALEN); |
3183 | ||
3184 | res = cfg80211_inform_single_bss_data(wiphy, &inform_data, gfp); | |
b0d1d7ff JB |
3185 | if (!res) |
3186 | return NULL; | |
eb142608 | 3187 | |
7e899c1d JB |
3188 | /* don't do any further MBSSID/ML handling for S1G */ |
3189 | if (ftype == CFG80211_BSS_FTYPE_S1G_BEACON) | |
3190 | return res; | |
3191 | ||
eb142608 | 3192 | cfg80211_parse_mbssid_data(wiphy, &inform_data, res, gfp); |
2481b5da BB |
3193 | |
3194 | cfg80211_parse_ml_sta_data(wiphy, &inform_data, res, gfp); | |
3195 | ||
0b8fb823 PX |
3196 | return res; |
3197 | } | |
3198 | EXPORT_SYMBOL(cfg80211_inform_bss_data); | |
3199 | ||
317bad4c JB |
3200 | struct cfg80211_bss * |
3201 | cfg80211_inform_bss_frame_data(struct wiphy *wiphy, | |
3202 | struct cfg80211_inform_bss *data, | |
3203 | struct ieee80211_mgmt *mgmt, size_t len, | |
3204 | gfp_t gfp) | |
2a519311 | 3205 | { |
6873cc44 | 3206 | size_t min_hdr_len; |
9eaffe50 | 3207 | struct ieee80211_ext *ext = NULL; |
7e899c1d JB |
3208 | enum cfg80211_bss_frame_type ftype; |
3209 | u16 beacon_interval; | |
3210 | const u8 *bssid; | |
3211 | u16 capability; | |
3212 | const u8 *ie; | |
3213 | size_t ielen; | |
3214 | u64 tsf; | |
4ee3e063 | 3215 | |
bef9bacc MK |
3216 | if (WARN_ON(!mgmt)) |
3217 | return NULL; | |
3218 | ||
3219 | if (WARN_ON(!wiphy)) | |
3220 | return NULL; | |
2a519311 | 3221 | |
317bad4c JB |
3222 | BUILD_BUG_ON(offsetof(struct ieee80211_mgmt, u.probe_resp.variable) != |
3223 | offsetof(struct ieee80211_mgmt, u.beacon.variable)); | |
3224 | ||
3225 | trace_cfg80211_inform_bss_frame(wiphy, data, mgmt, len); | |
2a519311 | 3226 | |
9eaffe50 TP |
3227 | if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { |
3228 | ext = (void *) mgmt; | |
9eaffe50 TP |
3229 | if (ieee80211_is_s1g_short_beacon(mgmt->frame_control)) |
3230 | min_hdr_len = offsetof(struct ieee80211_ext, | |
3231 | u.s1g_short_beacon.variable); | |
6873cc44 JB |
3232 | else |
3233 | min_hdr_len = offsetof(struct ieee80211_ext, | |
3234 | u.s1g_beacon.variable); | |
3235 | } else { | |
3236 | /* same for beacons */ | |
3237 | min_hdr_len = offsetof(struct ieee80211_mgmt, | |
3238 | u.probe_resp.variable); | |
9eaffe50 TP |
3239 | } |
3240 | ||
3241 | if (WARN_ON(len < min_hdr_len)) | |
2a519311 JB |
3242 | return NULL; |
3243 | ||
7e899c1d JB |
3244 | ielen = len - min_hdr_len; |
3245 | ie = mgmt->u.probe_resp.variable; | |
9eaffe50 | 3246 | if (ext) { |
b5ac0146 JB |
3247 | const struct ieee80211_s1g_bcn_compat_ie *compat; |
3248 | const struct element *elem; | |
9eaffe50 | 3249 | |
317bad4c | 3250 | if (ieee80211_is_s1g_short_beacon(mgmt->frame_control)) |
7e899c1d | 3251 | ie = ext->u.s1g_short_beacon.variable; |
317bad4c | 3252 | else |
7e899c1d | 3253 | ie = ext->u.s1g_beacon.variable; |
317bad4c | 3254 | |
7e899c1d | 3255 | elem = cfg80211_find_elem(WLAN_EID_S1G_BCN_COMPAT, ie, ielen); |
b5ac0146 JB |
3256 | if (!elem) |
3257 | return NULL; | |
3258 | if (elem->datalen < sizeof(*compat)) | |
9eaffe50 | 3259 | return NULL; |
b5ac0146 | 3260 | compat = (void *)elem->data; |
7e899c1d JB |
3261 | bssid = ext->u.s1g_beacon.sa; |
3262 | capability = le16_to_cpu(compat->compat_info); | |
3263 | beacon_interval = le16_to_cpu(compat->beacon_int); | |
9eaffe50 | 3264 | } else { |
7e899c1d JB |
3265 | bssid = mgmt->bssid; |
3266 | beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); | |
3267 | capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); | |
9eaffe50 TP |
3268 | } |
3269 | ||
7e899c1d | 3270 | tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); |
2a519311 | 3271 | |
9caf0364 | 3272 | if (ieee80211_is_probe_resp(mgmt->frame_control)) |
7e899c1d JB |
3273 | ftype = CFG80211_BSS_FTYPE_PRESP; |
3274 | else if (ext) | |
3275 | ftype = CFG80211_BSS_FTYPE_S1G_BEACON; | |
9caf0364 | 3276 | else |
7e899c1d | 3277 | ftype = CFG80211_BSS_FTYPE_BEACON; |
0b8fb823 | 3278 | |
7e899c1d JB |
3279 | return cfg80211_inform_bss_data(wiphy, data, ftype, |
3280 | bssid, tsf, capability, | |
3281 | beacon_interval, ie, ielen, | |
3282 | gfp); | |
0b8fb823 | 3283 | } |
6e19bc4b | 3284 | EXPORT_SYMBOL(cfg80211_inform_bss_frame_data); |
2a519311 | 3285 | |
5b112d3d | 3286 | void cfg80211_ref_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
4c0c0b75 | 3287 | { |
f26cbf40 | 3288 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
4c0c0b75 JB |
3289 | |
3290 | if (!pub) | |
3291 | return; | |
3292 | ||
1b8ec87a | 3293 | spin_lock_bh(&rdev->bss_lock); |
61e41e5d | 3294 | bss_ref_get(rdev, bss_from_pub(pub)); |
1b8ec87a | 3295 | spin_unlock_bh(&rdev->bss_lock); |
4c0c0b75 JB |
3296 | } |
3297 | EXPORT_SYMBOL(cfg80211_ref_bss); | |
3298 | ||
5b112d3d | 3299 | void cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
2a519311 | 3300 | { |
f26cbf40 | 3301 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
2a519311 JB |
3302 | |
3303 | if (!pub) | |
3304 | return; | |
3305 | ||
1b8ec87a | 3306 | spin_lock_bh(&rdev->bss_lock); |
61e41e5d | 3307 | bss_ref_put(rdev, bss_from_pub(pub)); |
1b8ec87a | 3308 | spin_unlock_bh(&rdev->bss_lock); |
2a519311 JB |
3309 | } |
3310 | EXPORT_SYMBOL(cfg80211_put_bss); | |
3311 | ||
d491af19 JB |
3312 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
3313 | { | |
f26cbf40 | 3314 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); |
7011ba58 SS |
3315 | struct cfg80211_internal_bss *bss, *tmp1; |
3316 | struct cfg80211_bss *nontrans_bss, *tmp; | |
d491af19 JB |
3317 | |
3318 | if (WARN_ON(!pub)) | |
3319 | return; | |
3320 | ||
61e41e5d | 3321 | bss = bss_from_pub(pub); |
d491af19 | 3322 | |
1b8ec87a | 3323 | spin_lock_bh(&rdev->bss_lock); |
7011ba58 SS |
3324 | if (list_empty(&bss->list)) |
3325 | goto out; | |
3326 | ||
3327 | list_for_each_entry_safe(nontrans_bss, tmp, | |
3328 | &pub->nontrans_list, | |
3329 | nontrans_list) { | |
61e41e5d | 3330 | tmp1 = bss_from_pub(nontrans_bss); |
7011ba58 | 3331 | if (__cfg80211_unlink_bss(rdev, tmp1)) |
1b8ec87a | 3332 | rdev->bss_generation++; |
3207390a | 3333 | } |
7011ba58 SS |
3334 | |
3335 | if (__cfg80211_unlink_bss(rdev, bss)) | |
3336 | rdev->bss_generation++; | |
3337 | out: | |
1b8ec87a | 3338 | spin_unlock_bh(&rdev->bss_lock); |
d491af19 JB |
3339 | } |
3340 | EXPORT_SYMBOL(cfg80211_unlink_bss); | |
3341 | ||
4770c8f9 IP |
3342 | void cfg80211_bss_iter(struct wiphy *wiphy, |
3343 | struct cfg80211_chan_def *chandef, | |
3344 | void (*iter)(struct wiphy *wiphy, | |
3345 | struct cfg80211_bss *bss, | |
3346 | void *data), | |
3347 | void *iter_data) | |
3348 | { | |
3349 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
3350 | struct cfg80211_internal_bss *bss; | |
3351 | ||
3352 | spin_lock_bh(&rdev->bss_lock); | |
3353 | ||
3354 | list_for_each_entry(bss, &rdev->bss_list, list) { | |
7b0a0e3c JB |
3355 | if (!chandef || cfg80211_is_sub_chan(chandef, bss->pub.channel, |
3356 | false)) | |
4770c8f9 IP |
3357 | iter(wiphy, &bss->pub, iter_data); |
3358 | } | |
3359 | ||
3360 | spin_unlock_bh(&rdev->bss_lock); | |
3361 | } | |
3362 | EXPORT_SYMBOL(cfg80211_bss_iter); | |
3363 | ||
0afd425b | 3364 | void cfg80211_update_assoc_bss_entry(struct wireless_dev *wdev, |
7b0a0e3c | 3365 | unsigned int link_id, |
0afd425b SM |
3366 | struct ieee80211_channel *chan) |
3367 | { | |
3368 | struct wiphy *wiphy = wdev->wiphy; | |
3369 | struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy); | |
7b0a0e3c | 3370 | struct cfg80211_internal_bss *cbss = wdev->links[link_id].client.current_bss; |
0afd425b SM |
3371 | struct cfg80211_internal_bss *new = NULL; |
3372 | struct cfg80211_internal_bss *bss; | |
3373 | struct cfg80211_bss *nontrans_bss; | |
3374 | struct cfg80211_bss *tmp; | |
3375 | ||
3376 | spin_lock_bh(&rdev->bss_lock); | |
3377 | ||
05dcb8bb IP |
3378 | /* |
3379 | * Some APs use CSA also for bandwidth changes, i.e., without actually | |
3380 | * changing the control channel, so no need to update in such a case. | |
3381 | */ | |
3382 | if (cbss->pub.channel == chan) | |
0afd425b SM |
3383 | goto done; |
3384 | ||
3385 | /* use transmitting bss */ | |
3386 | if (cbss->pub.transmitted_bss) | |
61e41e5d | 3387 | cbss = bss_from_pub(cbss->pub.transmitted_bss); |
0afd425b SM |
3388 | |
3389 | cbss->pub.channel = chan; | |
3390 | ||
3391 | list_for_each_entry(bss, &rdev->bss_list, list) { | |
3392 | if (!cfg80211_bss_type_match(bss->pub.capability, | |
3393 | bss->pub.channel->band, | |
3394 | wdev->conn_bss_type)) | |
3395 | continue; | |
3396 | ||
3397 | if (bss == cbss) | |
3398 | continue; | |
3399 | ||
3400 | if (!cmp_bss(&bss->pub, &cbss->pub, BSS_CMP_REGULAR)) { | |
3401 | new = bss; | |
3402 | break; | |
3403 | } | |
3404 | } | |
3405 | ||
3406 | if (new) { | |
3407 | /* to save time, update IEs for transmitting bss only */ | |
acc44cbd BB |
3408 | cfg80211_update_known_bss(rdev, cbss, new, false); |
3409 | new->pub.proberesp_ies = NULL; | |
3410 | new->pub.beacon_ies = NULL; | |
0afd425b SM |
3411 | |
3412 | list_for_each_entry_safe(nontrans_bss, tmp, | |
3413 | &new->pub.nontrans_list, | |
3414 | nontrans_list) { | |
61e41e5d | 3415 | bss = bss_from_pub(nontrans_bss); |
0afd425b SM |
3416 | if (__cfg80211_unlink_bss(rdev, bss)) |
3417 | rdev->bss_generation++; | |
3418 | } | |
3419 | ||
3420 | WARN_ON(atomic_read(&new->hold)); | |
3421 | if (!WARN_ON(!__cfg80211_unlink_bss(rdev, new))) | |
3422 | rdev->bss_generation++; | |
3423 | } | |
7f12e26a | 3424 | cfg80211_rehash_bss(rdev, cbss); |
0afd425b SM |
3425 | |
3426 | list_for_each_entry_safe(nontrans_bss, tmp, | |
3427 | &cbss->pub.nontrans_list, | |
3428 | nontrans_list) { | |
61e41e5d | 3429 | bss = bss_from_pub(nontrans_bss); |
0afd425b | 3430 | bss->pub.channel = chan; |
7f12e26a | 3431 | cfg80211_rehash_bss(rdev, bss); |
0afd425b SM |
3432 | } |
3433 | ||
3434 | done: | |
3435 | spin_unlock_bh(&rdev->bss_lock); | |
3436 | } | |
3437 | ||
3d23e349 | 3438 | #ifdef CONFIG_CFG80211_WEXT |
9f419f38 JB |
3439 | static struct cfg80211_registered_device * |
3440 | cfg80211_get_dev_from_ifindex(struct net *net, int ifindex) | |
3441 | { | |
5fe231e8 | 3442 | struct cfg80211_registered_device *rdev; |
9f419f38 JB |
3443 | struct net_device *dev; |
3444 | ||
5fe231e8 JB |
3445 | ASSERT_RTNL(); |
3446 | ||
9f419f38 JB |
3447 | dev = dev_get_by_index(net, ifindex); |
3448 | if (!dev) | |
5fe231e8 JB |
3449 | return ERR_PTR(-ENODEV); |
3450 | if (dev->ieee80211_ptr) | |
f26cbf40 | 3451 | rdev = wiphy_to_rdev(dev->ieee80211_ptr->wiphy); |
5fe231e8 | 3452 | else |
9f419f38 JB |
3453 | rdev = ERR_PTR(-ENODEV); |
3454 | dev_put(dev); | |
9f419f38 JB |
3455 | return rdev; |
3456 | } | |
3457 | ||
2a519311 JB |
3458 | int cfg80211_wext_siwscan(struct net_device *dev, |
3459 | struct iw_request_info *info, | |
3460 | union iwreq_data *wrqu, char *extra) | |
3461 | { | |
3462 | struct cfg80211_registered_device *rdev; | |
3463 | struct wiphy *wiphy; | |
3464 | struct iw_scan_req *wreq = NULL; | |
3536672b | 3465 | struct cfg80211_scan_request *creq; |
2a519311 | 3466 | int i, err, n_channels = 0; |
57fbcce3 | 3467 | enum nl80211_band band; |
2a519311 JB |
3468 | |
3469 | if (!netif_running(dev)) | |
3470 | return -ENETDOWN; | |
3471 | ||
b2e3abdc HS |
3472 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
3473 | wreq = (struct iw_scan_req *)extra; | |
3474 | ||
463d0183 | 3475 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
3476 | |
3477 | if (IS_ERR(rdev)) | |
3478 | return PTR_ERR(rdev); | |
3479 | ||
3536672b | 3480 | if (rdev->scan_req || rdev->scan_msg) |
3481 | return -EBUSY; | |
2a519311 JB |
3482 | |
3483 | wiphy = &rdev->wiphy; | |
3484 | ||
b2e3abdc | 3485 | /* Determine number of channels, needed to allocate creq */ |
6ef09cdc DA |
3486 | if (wreq && wreq->num_channels) { |
3487 | /* Passed from userspace so should be checked */ | |
3488 | if (unlikely(wreq->num_channels > IW_MAX_FREQUENCIES)) | |
3489 | return -EINVAL; | |
b2e3abdc | 3490 | n_channels = wreq->num_channels; |
6ef09cdc | 3491 | } else { |
bdfbec2d | 3492 | n_channels = ieee80211_get_num_supported_channels(wiphy); |
6ef09cdc | 3493 | } |
2a519311 | 3494 | |
a26a5107 DA |
3495 | creq = kzalloc(struct_size(creq, channels, n_channels) + |
3496 | sizeof(struct cfg80211_ssid), | |
2a519311 | 3497 | GFP_ATOMIC); |
3536672b | 3498 | if (!creq) |
3499 | return -ENOMEM; | |
2a519311 JB |
3500 | |
3501 | creq->wiphy = wiphy; | |
fd014284 | 3502 | creq->wdev = dev->ieee80211_ptr; |
5ba63533 | 3503 | /* SSIDs come after channels */ |
a26a5107 | 3504 | creq->ssids = (void *)creq + struct_size(creq, channels, n_channels); |
2a519311 JB |
3505 | creq->n_channels = n_channels; |
3506 | creq->n_ssids = 1; | |
15d6030b | 3507 | creq->scan_start = jiffies; |
2a519311 | 3508 | |
b2e3abdc | 3509 | /* translate "Scan on frequencies" request */ |
2a519311 | 3510 | i = 0; |
57fbcce3 | 3511 | for (band = 0; band < NUM_NL80211_BANDS; band++) { |
2a519311 | 3512 | int j; |
584991dc | 3513 | |
2a519311 JB |
3514 | if (!wiphy->bands[band]) |
3515 | continue; | |
584991dc | 3516 | |
2a519311 | 3517 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
584991dc JB |
3518 | /* ignore disabled channels */ |
3519 | if (wiphy->bands[band]->channels[j].flags & | |
3520 | IEEE80211_CHAN_DISABLED) | |
3521 | continue; | |
b2e3abdc HS |
3522 | |
3523 | /* If we have a wireless request structure and the | |
3524 | * wireless request specifies frequencies, then search | |
3525 | * for the matching hardware channel. | |
3526 | */ | |
3527 | if (wreq && wreq->num_channels) { | |
3528 | int k; | |
3529 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; | |
3530 | for (k = 0; k < wreq->num_channels; k++) { | |
96998e3a ZG |
3531 | struct iw_freq *freq = |
3532 | &wreq->channel_list[k]; | |
3533 | int wext_freq = | |
3534 | cfg80211_wext_freq(freq); | |
3535 | ||
b2e3abdc HS |
3536 | if (wext_freq == wiphy_freq) |
3537 | goto wext_freq_found; | |
3538 | } | |
3539 | goto wext_freq_not_found; | |
3540 | } | |
3541 | ||
3542 | wext_freq_found: | |
2a519311 JB |
3543 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
3544 | i++; | |
b2e3abdc | 3545 | wext_freq_not_found: ; |
2a519311 JB |
3546 | } |
3547 | } | |
8862dc5f HS |
3548 | /* No channels found? */ |
3549 | if (!i) { | |
3550 | err = -EINVAL; | |
3551 | goto out; | |
3552 | } | |
2a519311 | 3553 | |
b2e3abdc HS |
3554 | /* Set real number of channels specified in creq->channels[] */ |
3555 | creq->n_channels = i; | |
2a519311 | 3556 | |
b2e3abdc HS |
3557 | /* translate "Scan for SSID" request */ |
3558 | if (wreq) { | |
2a519311 | 3559 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
65486c8b JB |
3560 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
3561 | err = -EINVAL; | |
3562 | goto out; | |
3563 | } | |
2a519311 JB |
3564 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
3565 | creq->ssids[0].ssid_len = wreq->essid_len; | |
3566 | } | |
09417723 JB |
3567 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) { |
3568 | creq->ssids = NULL; | |
2a519311 | 3569 | creq->n_ssids = 0; |
09417723 | 3570 | } |
2a519311 JB |
3571 | } |
3572 | ||
57fbcce3 | 3573 | for (i = 0; i < NUM_NL80211_BANDS; i++) |
a401d2bb JB |
3574 | if (wiphy->bands[i]) |
3575 | creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1; | |
34850ab2 | 3576 | |
818965d3 JM |
3577 | eth_broadcast_addr(creq->bssid); |
3578 | ||
a05829a7 JB |
3579 | wiphy_lock(&rdev->wiphy); |
3580 | ||
2a519311 | 3581 | rdev->scan_req = creq; |
e35e4d28 | 3582 | err = rdev_scan(rdev, creq); |
2a519311 JB |
3583 | if (err) { |
3584 | rdev->scan_req = NULL; | |
65486c8b | 3585 | /* creq will be freed below */ |
463d0183 | 3586 | } else { |
fd014284 | 3587 | nl80211_send_scan_start(rdev, dev->ieee80211_ptr); |
65486c8b JB |
3588 | /* creq now owned by driver */ |
3589 | creq = NULL; | |
463d0183 JB |
3590 | dev_hold(dev); |
3591 | } | |
a05829a7 | 3592 | wiphy_unlock(&rdev->wiphy); |
2a519311 | 3593 | out: |
65486c8b | 3594 | kfree(creq); |
2a519311 JB |
3595 | return err; |
3596 | } | |
2afe38d1 | 3597 | EXPORT_WEXT_HANDLER(cfg80211_wext_siwscan); |
2a519311 | 3598 | |
76a70e9c JM |
3599 | static char *ieee80211_scan_add_ies(struct iw_request_info *info, |
3600 | const struct cfg80211_bss_ies *ies, | |
3601 | char *current_ev, char *end_buf) | |
2a519311 | 3602 | { |
9caf0364 | 3603 | const u8 *pos, *end, *next; |
2a519311 JB |
3604 | struct iw_event iwe; |
3605 | ||
9caf0364 | 3606 | if (!ies) |
76a70e9c | 3607 | return current_ev; |
2a519311 JB |
3608 | |
3609 | /* | |
3610 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
3611 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
3612 | */ | |
9caf0364 JB |
3613 | pos = ies->data; |
3614 | end = pos + ies->len; | |
2a519311 JB |
3615 | |
3616 | while (end - pos > IW_GENERIC_IE_MAX) { | |
3617 | next = pos + 2 + pos[1]; | |
3618 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
3619 | next = next + 2 + next[1]; | |
3620 | ||
3621 | memset(&iwe, 0, sizeof(iwe)); | |
3622 | iwe.cmd = IWEVGENIE; | |
3623 | iwe.u.data.length = next - pos; | |
76a70e9c JM |
3624 | current_ev = iwe_stream_add_point_check(info, current_ev, |
3625 | end_buf, &iwe, | |
3626 | (void *)pos); | |
3627 | if (IS_ERR(current_ev)) | |
3628 | return current_ev; | |
2a519311 JB |
3629 | pos = next; |
3630 | } | |
3631 | ||
3632 | if (end > pos) { | |
3633 | memset(&iwe, 0, sizeof(iwe)); | |
3634 | iwe.cmd = IWEVGENIE; | |
3635 | iwe.u.data.length = end - pos; | |
76a70e9c JM |
3636 | current_ev = iwe_stream_add_point_check(info, current_ev, |
3637 | end_buf, &iwe, | |
3638 | (void *)pos); | |
3639 | if (IS_ERR(current_ev)) | |
3640 | return current_ev; | |
2a519311 | 3641 | } |
76a70e9c JM |
3642 | |
3643 | return current_ev; | |
2a519311 JB |
3644 | } |
3645 | ||
2a519311 | 3646 | static char * |
77965c97 JB |
3647 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
3648 | struct cfg80211_internal_bss *bss, char *current_ev, | |
3649 | char *end_buf) | |
2a519311 | 3650 | { |
9caf0364 | 3651 | const struct cfg80211_bss_ies *ies; |
2a519311 | 3652 | struct iw_event iwe; |
9caf0364 | 3653 | const u8 *ie; |
76a70e9c JM |
3654 | u8 buf[50]; |
3655 | u8 *cfg, *p, *tmp; | |
9caf0364 | 3656 | int rem, i, sig; |
2a519311 JB |
3657 | bool ismesh = false; |
3658 | ||
3659 | memset(&iwe, 0, sizeof(iwe)); | |
3660 | iwe.cmd = SIOCGIWAP; | |
3661 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
3662 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); | |
76a70e9c JM |
3663 | current_ev = iwe_stream_add_event_check(info, current_ev, end_buf, &iwe, |
3664 | IW_EV_ADDR_LEN); | |
3665 | if (IS_ERR(current_ev)) | |
3666 | return current_ev; | |
2a519311 JB |
3667 | |
3668 | memset(&iwe, 0, sizeof(iwe)); | |
3669 | iwe.cmd = SIOCGIWFREQ; | |
3670 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); | |
3671 | iwe.u.freq.e = 0; | |
76a70e9c JM |
3672 | current_ev = iwe_stream_add_event_check(info, current_ev, end_buf, &iwe, |
3673 | IW_EV_FREQ_LEN); | |
3674 | if (IS_ERR(current_ev)) | |
3675 | return current_ev; | |
2a519311 JB |
3676 | |
3677 | memset(&iwe, 0, sizeof(iwe)); | |
3678 | iwe.cmd = SIOCGIWFREQ; | |
3679 | iwe.u.freq.m = bss->pub.channel->center_freq; | |
3680 | iwe.u.freq.e = 6; | |
76a70e9c JM |
3681 | current_ev = iwe_stream_add_event_check(info, current_ev, end_buf, &iwe, |
3682 | IW_EV_FREQ_LEN); | |
3683 | if (IS_ERR(current_ev)) | |
3684 | return current_ev; | |
2a519311 | 3685 | |
77965c97 | 3686 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
2a519311 JB |
3687 | memset(&iwe, 0, sizeof(iwe)); |
3688 | iwe.cmd = IWEVQUAL; | |
3689 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | | |
3690 | IW_QUAL_NOISE_INVALID | | |
a77b8552 | 3691 | IW_QUAL_QUAL_UPDATED; |
77965c97 | 3692 | switch (wiphy->signal_type) { |
2a519311 | 3693 | case CFG80211_SIGNAL_TYPE_MBM: |
a77b8552 JB |
3694 | sig = bss->pub.signal / 100; |
3695 | iwe.u.qual.level = sig; | |
2a519311 | 3696 | iwe.u.qual.updated |= IW_QUAL_DBM; |
a77b8552 JB |
3697 | if (sig < -110) /* rather bad */ |
3698 | sig = -110; | |
3699 | else if (sig > -40) /* perfect */ | |
3700 | sig = -40; | |
3701 | /* will give a range of 0 .. 70 */ | |
3702 | iwe.u.qual.qual = sig + 110; | |
2a519311 JB |
3703 | break; |
3704 | case CFG80211_SIGNAL_TYPE_UNSPEC: | |
3705 | iwe.u.qual.level = bss->pub.signal; | |
a77b8552 JB |
3706 | /* will give range 0 .. 100 */ |
3707 | iwe.u.qual.qual = bss->pub.signal; | |
2a519311 JB |
3708 | break; |
3709 | default: | |
3710 | /* not reached */ | |
3711 | break; | |
3712 | } | |
76a70e9c JM |
3713 | current_ev = iwe_stream_add_event_check(info, current_ev, |
3714 | end_buf, &iwe, | |
3715 | IW_EV_QUAL_LEN); | |
3716 | if (IS_ERR(current_ev)) | |
3717 | return current_ev; | |
2a519311 JB |
3718 | } |
3719 | ||
3720 | memset(&iwe, 0, sizeof(iwe)); | |
3721 | iwe.cmd = SIOCGIWENCODE; | |
3722 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) | |
3723 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
3724 | else | |
3725 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
3726 | iwe.u.data.length = 0; | |
76a70e9c JM |
3727 | current_ev = iwe_stream_add_point_check(info, current_ev, end_buf, |
3728 | &iwe, ""); | |
3729 | if (IS_ERR(current_ev)) | |
3730 | return current_ev; | |
2a519311 | 3731 | |
9caf0364 JB |
3732 | rcu_read_lock(); |
3733 | ies = rcu_dereference(bss->pub.ies); | |
83c7aa1a JB |
3734 | rem = ies->len; |
3735 | ie = ies->data; | |
9caf0364 | 3736 | |
83c7aa1a | 3737 | while (rem >= 2) { |
2a519311 JB |
3738 | /* invalid data */ |
3739 | if (ie[1] > rem - 2) | |
3740 | break; | |
3741 | ||
3742 | switch (ie[0]) { | |
3743 | case WLAN_EID_SSID: | |
3744 | memset(&iwe, 0, sizeof(iwe)); | |
3745 | iwe.cmd = SIOCGIWESSID; | |
3746 | iwe.u.data.length = ie[1]; | |
3747 | iwe.u.data.flags = 1; | |
76a70e9c JM |
3748 | current_ev = iwe_stream_add_point_check(info, |
3749 | current_ev, | |
3750 | end_buf, &iwe, | |
3751 | (u8 *)ie + 2); | |
3752 | if (IS_ERR(current_ev)) | |
3753 | goto unlock; | |
2a519311 JB |
3754 | break; |
3755 | case WLAN_EID_MESH_ID: | |
3756 | memset(&iwe, 0, sizeof(iwe)); | |
3757 | iwe.cmd = SIOCGIWESSID; | |
3758 | iwe.u.data.length = ie[1]; | |
3759 | iwe.u.data.flags = 1; | |
76a70e9c JM |
3760 | current_ev = iwe_stream_add_point_check(info, |
3761 | current_ev, | |
3762 | end_buf, &iwe, | |
3763 | (u8 *)ie + 2); | |
3764 | if (IS_ERR(current_ev)) | |
3765 | goto unlock; | |
2a519311 JB |
3766 | break; |
3767 | case WLAN_EID_MESH_CONFIG: | |
3768 | ismesh = true; | |
136cfa28 | 3769 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 | 3770 | break; |
9caf0364 | 3771 | cfg = (u8 *)ie + 2; |
2a519311 JB |
3772 | memset(&iwe, 0, sizeof(iwe)); |
3773 | iwe.cmd = IWEVCUSTOM; | |
22446b7e DA |
3774 | iwe.u.data.length = sprintf(buf, |
3775 | "Mesh Network Path Selection Protocol ID: 0x%02X", | |
3776 | cfg[0]); | |
76a70e9c JM |
3777 | current_ev = iwe_stream_add_point_check(info, |
3778 | current_ev, | |
3779 | end_buf, | |
3780 | &iwe, buf); | |
3781 | if (IS_ERR(current_ev)) | |
3782 | goto unlock; | |
22446b7e DA |
3783 | iwe.u.data.length = sprintf(buf, |
3784 | "Path Selection Metric ID: 0x%02X", | |
3785 | cfg[1]); | |
76a70e9c JM |
3786 | current_ev = iwe_stream_add_point_check(info, |
3787 | current_ev, | |
3788 | end_buf, | |
3789 | &iwe, buf); | |
3790 | if (IS_ERR(current_ev)) | |
3791 | goto unlock; | |
22446b7e DA |
3792 | iwe.u.data.length = sprintf(buf, |
3793 | "Congestion Control Mode ID: 0x%02X", | |
3794 | cfg[2]); | |
76a70e9c JM |
3795 | current_ev = iwe_stream_add_point_check(info, |
3796 | current_ev, | |
3797 | end_buf, | |
3798 | &iwe, buf); | |
3799 | if (IS_ERR(current_ev)) | |
3800 | goto unlock; | |
22446b7e DA |
3801 | iwe.u.data.length = sprintf(buf, |
3802 | "Synchronization ID: 0x%02X", | |
3803 | cfg[3]); | |
76a70e9c JM |
3804 | current_ev = iwe_stream_add_point_check(info, |
3805 | current_ev, | |
3806 | end_buf, | |
3807 | &iwe, buf); | |
3808 | if (IS_ERR(current_ev)) | |
3809 | goto unlock; | |
22446b7e DA |
3810 | iwe.u.data.length = sprintf(buf, |
3811 | "Authentication ID: 0x%02X", | |
3812 | cfg[4]); | |
76a70e9c JM |
3813 | current_ev = iwe_stream_add_point_check(info, |
3814 | current_ev, | |
3815 | end_buf, | |
3816 | &iwe, buf); | |
3817 | if (IS_ERR(current_ev)) | |
3818 | goto unlock; | |
22446b7e DA |
3819 | iwe.u.data.length = sprintf(buf, |
3820 | "Formation Info: 0x%02X", | |
3821 | cfg[5]); | |
76a70e9c JM |
3822 | current_ev = iwe_stream_add_point_check(info, |
3823 | current_ev, | |
3824 | end_buf, | |
3825 | &iwe, buf); | |
3826 | if (IS_ERR(current_ev)) | |
3827 | goto unlock; | |
22446b7e DA |
3828 | iwe.u.data.length = sprintf(buf, |
3829 | "Capabilities: 0x%02X", | |
3830 | cfg[6]); | |
76a70e9c JM |
3831 | current_ev = iwe_stream_add_point_check(info, |
3832 | current_ev, | |
3833 | end_buf, | |
3834 | &iwe, buf); | |
3835 | if (IS_ERR(current_ev)) | |
3836 | goto unlock; | |
2a519311 JB |
3837 | break; |
3838 | case WLAN_EID_SUPP_RATES: | |
3839 | case WLAN_EID_EXT_SUPP_RATES: | |
3840 | /* display all supported rates in readable format */ | |
3841 | p = current_ev + iwe_stream_lcp_len(info); | |
3842 | ||
3843 | memset(&iwe, 0, sizeof(iwe)); | |
3844 | iwe.cmd = SIOCGIWRATE; | |
3845 | /* Those two flags are ignored... */ | |
3846 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
3847 | ||
3848 | for (i = 0; i < ie[1]; i++) { | |
3849 | iwe.u.bitrate.value = | |
3850 | ((ie[i + 2] & 0x7f) * 500000); | |
76a70e9c | 3851 | tmp = p; |
2a519311 | 3852 | p = iwe_stream_add_value(info, current_ev, p, |
76a70e9c JM |
3853 | end_buf, &iwe, |
3854 | IW_EV_PARAM_LEN); | |
3855 | if (p == tmp) { | |
3856 | current_ev = ERR_PTR(-E2BIG); | |
3857 | goto unlock; | |
3858 | } | |
2a519311 JB |
3859 | } |
3860 | current_ev = p; | |
3861 | break; | |
3862 | } | |
3863 | rem -= ie[1] + 2; | |
3864 | ie += ie[1] + 2; | |
3865 | } | |
3866 | ||
f64f9e71 JP |
3867 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
3868 | ismesh) { | |
2a519311 JB |
3869 | memset(&iwe, 0, sizeof(iwe)); |
3870 | iwe.cmd = SIOCGIWMODE; | |
3871 | if (ismesh) | |
3872 | iwe.u.mode = IW_MODE_MESH; | |
3873 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) | |
3874 | iwe.u.mode = IW_MODE_MASTER; | |
3875 | else | |
3876 | iwe.u.mode = IW_MODE_ADHOC; | |
76a70e9c JM |
3877 | current_ev = iwe_stream_add_event_check(info, current_ev, |
3878 | end_buf, &iwe, | |
3879 | IW_EV_UINT_LEN); | |
3880 | if (IS_ERR(current_ev)) | |
3881 | goto unlock; | |
2a519311 JB |
3882 | } |
3883 | ||
76a70e9c JM |
3884 | memset(&iwe, 0, sizeof(iwe)); |
3885 | iwe.cmd = IWEVCUSTOM; | |
22446b7e DA |
3886 | iwe.u.data.length = sprintf(buf, "tsf=%016llx", |
3887 | (unsigned long long)(ies->tsf)); | |
76a70e9c JM |
3888 | current_ev = iwe_stream_add_point_check(info, current_ev, end_buf, |
3889 | &iwe, buf); | |
3890 | if (IS_ERR(current_ev)) | |
3891 | goto unlock; | |
3892 | memset(&iwe, 0, sizeof(iwe)); | |
3893 | iwe.cmd = IWEVCUSTOM; | |
22446b7e DA |
3894 | iwe.u.data.length = sprintf(buf, " Last beacon: %ums ago", |
3895 | elapsed_jiffies_msecs(bss->ts)); | |
76a70e9c JM |
3896 | current_ev = iwe_stream_add_point_check(info, current_ev, |
3897 | end_buf, &iwe, buf); | |
3898 | if (IS_ERR(current_ev)) | |
3899 | goto unlock; | |
3900 | ||
3901 | current_ev = ieee80211_scan_add_ies(info, ies, current_ev, end_buf); | |
3902 | ||
3903 | unlock: | |
9caf0364 | 3904 | rcu_read_unlock(); |
2a519311 JB |
3905 | return current_ev; |
3906 | } | |
3907 | ||
3908 | ||
1b8ec87a | 3909 | static int ieee80211_scan_results(struct cfg80211_registered_device *rdev, |
2a519311 JB |
3910 | struct iw_request_info *info, |
3911 | char *buf, size_t len) | |
3912 | { | |
3913 | char *current_ev = buf; | |
3914 | char *end_buf = buf + len; | |
3915 | struct cfg80211_internal_bss *bss; | |
76a70e9c | 3916 | int err = 0; |
2a519311 | 3917 | |
1b8ec87a ZG |
3918 | spin_lock_bh(&rdev->bss_lock); |
3919 | cfg80211_bss_expire(rdev); | |
2a519311 | 3920 | |
1b8ec87a | 3921 | list_for_each_entry(bss, &rdev->bss_list, list) { |
2a519311 | 3922 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { |
76a70e9c JM |
3923 | err = -E2BIG; |
3924 | break; | |
2a519311 | 3925 | } |
1b8ec87a | 3926 | current_ev = ieee80211_bss(&rdev->wiphy, info, bss, |
77965c97 | 3927 | current_ev, end_buf); |
76a70e9c JM |
3928 | if (IS_ERR(current_ev)) { |
3929 | err = PTR_ERR(current_ev); | |
3930 | break; | |
3931 | } | |
2a519311 | 3932 | } |
1b8ec87a | 3933 | spin_unlock_bh(&rdev->bss_lock); |
76a70e9c JM |
3934 | |
3935 | if (err) | |
3936 | return err; | |
2a519311 JB |
3937 | return current_ev - buf; |
3938 | } | |
3939 | ||
3940 | ||
3941 | int cfg80211_wext_giwscan(struct net_device *dev, | |
3942 | struct iw_request_info *info, | |
02ae6a70 | 3943 | union iwreq_data *wrqu, char *extra) |
2a519311 | 3944 | { |
02ae6a70 | 3945 | struct iw_point *data = &wrqu->data; |
2a519311 JB |
3946 | struct cfg80211_registered_device *rdev; |
3947 | int res; | |
3948 | ||
3949 | if (!netif_running(dev)) | |
3950 | return -ENETDOWN; | |
3951 | ||
463d0183 | 3952 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
3953 | |
3954 | if (IS_ERR(rdev)) | |
3955 | return PTR_ERR(rdev); | |
3956 | ||
f9d15d16 | 3957 | if (rdev->scan_req || rdev->scan_msg) |
5fe231e8 | 3958 | return -EAGAIN; |
2a519311 JB |
3959 | |
3960 | res = ieee80211_scan_results(rdev, info, extra, data->length); | |
3961 | data->length = 0; | |
3962 | if (res >= 0) { | |
3963 | data->length = res; | |
3964 | res = 0; | |
3965 | } | |
3966 | ||
2a519311 JB |
3967 | return res; |
3968 | } | |
2afe38d1 | 3969 | EXPORT_WEXT_HANDLER(cfg80211_wext_giwscan); |
2a519311 | 3970 | #endif |