Commit | Line | Data |
---|---|---|
2a519311 JB |
1 | /* |
2 | * cfg80211 scan result handling | |
3 | * | |
4 | * Copyright 2008 Johannes Berg <johannes@sipsolutions.net> | |
5 | */ | |
6 | #include <linux/kernel.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
2a519311 JB |
8 | #include <linux/module.h> |
9 | #include <linux/netdevice.h> | |
10 | #include <linux/wireless.h> | |
11 | #include <linux/nl80211.h> | |
12 | #include <linux/etherdevice.h> | |
13 | #include <net/arp.h> | |
14 | #include <net/cfg80211.h> | |
15 | #include <net/iw_handler.h> | |
16 | #include "core.h" | |
17 | #include "nl80211.h" | |
a9a11622 | 18 | #include "wext-compat.h" |
2a519311 | 19 | |
09f97e0f | 20 | #define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ) |
2a519311 | 21 | |
01a0ac41 | 22 | void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak) |
2a519311 | 23 | { |
667503dd | 24 | struct cfg80211_scan_request *request; |
2a519311 | 25 | struct net_device *dev; |
3d23e349 | 26 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
27 | union iwreq_data wrqu; |
28 | #endif | |
29 | ||
01a0ac41 JB |
30 | ASSERT_RDEV_LOCK(rdev); |
31 | ||
667503dd JB |
32 | request = rdev->scan_req; |
33 | ||
01a0ac41 JB |
34 | if (!request) |
35 | return; | |
36 | ||
463d0183 | 37 | dev = request->dev; |
2a519311 | 38 | |
6829c878 JB |
39 | /* |
40 | * This must be before sending the other events! | |
41 | * Otherwise, wpa_supplicant gets completely confused with | |
42 | * wext events. | |
43 | */ | |
44 | cfg80211_sme_scan_done(dev); | |
45 | ||
667503dd | 46 | if (request->aborted) |
36e6fea8 | 47 | nl80211_send_scan_aborted(rdev, dev); |
2a519311 | 48 | else |
36e6fea8 | 49 | nl80211_send_scan_done(rdev, dev); |
2a519311 | 50 | |
3d23e349 | 51 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 52 | if (!request->aborted) { |
2a519311 JB |
53 | memset(&wrqu, 0, sizeof(wrqu)); |
54 | ||
55 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
56 | } | |
57 | #endif | |
58 | ||
59 | dev_put(dev); | |
60 | ||
36e6fea8 | 61 | rdev->scan_req = NULL; |
01a0ac41 JB |
62 | |
63 | /* | |
64 | * OK. If this is invoked with "leak" then we can't | |
65 | * free this ... but we've cleaned it up anyway. The | |
66 | * driver failed to call the scan_done callback, so | |
67 | * all bets are off, it might still be trying to use | |
68 | * the scan request or not ... if it accesses the dev | |
69 | * in there (it shouldn't anyway) then it may crash. | |
70 | */ | |
71 | if (!leak) | |
72 | kfree(request); | |
2a519311 | 73 | } |
667503dd | 74 | |
36e6fea8 JB |
75 | void __cfg80211_scan_done(struct work_struct *wk) |
76 | { | |
77 | struct cfg80211_registered_device *rdev; | |
78 | ||
79 | rdev = container_of(wk, struct cfg80211_registered_device, | |
80 | scan_done_wk); | |
81 | ||
82 | cfg80211_lock_rdev(rdev); | |
01a0ac41 | 83 | ___cfg80211_scan_done(rdev, false); |
36e6fea8 JB |
84 | cfg80211_unlock_rdev(rdev); |
85 | } | |
86 | ||
667503dd JB |
87 | void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) |
88 | { | |
667503dd JB |
89 | WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req); |
90 | ||
91 | request->aborted = aborted; | |
e60d7443 | 92 | queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk); |
667503dd | 93 | } |
2a519311 JB |
94 | EXPORT_SYMBOL(cfg80211_scan_done); |
95 | ||
96 | static void bss_release(struct kref *ref) | |
97 | { | |
98 | struct cfg80211_internal_bss *bss; | |
99 | ||
100 | bss = container_of(ref, struct cfg80211_internal_bss, ref); | |
78c1c7e1 JB |
101 | if (bss->pub.free_priv) |
102 | bss->pub.free_priv(&bss->pub); | |
cd1658f5 | 103 | |
34a6eddb JM |
104 | if (bss->beacon_ies_allocated) |
105 | kfree(bss->pub.beacon_ies); | |
106 | if (bss->proberesp_ies_allocated) | |
107 | kfree(bss->pub.proberesp_ies); | |
cd1658f5 | 108 | |
19957bb3 JB |
109 | BUG_ON(atomic_read(&bss->hold)); |
110 | ||
2a519311 JB |
111 | kfree(bss); |
112 | } | |
113 | ||
cb3a8eec DW |
114 | /* must hold dev->bss_lock! */ |
115 | void cfg80211_bss_age(struct cfg80211_registered_device *dev, | |
116 | unsigned long age_secs) | |
117 | { | |
118 | struct cfg80211_internal_bss *bss; | |
119 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
120 | ||
121 | list_for_each_entry(bss, &dev->bss_list, list) { | |
122 | bss->ts -= age_jiffies; | |
123 | } | |
124 | } | |
125 | ||
2a519311 JB |
126 | /* must hold dev->bss_lock! */ |
127 | void cfg80211_bss_expire(struct cfg80211_registered_device *dev) | |
128 | { | |
129 | struct cfg80211_internal_bss *bss, *tmp; | |
130 | bool expired = false; | |
131 | ||
132 | list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { | |
19957bb3 JB |
133 | if (atomic_read(&bss->hold)) |
134 | continue; | |
135 | if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2a519311 JB |
136 | continue; |
137 | list_del(&bss->list); | |
138 | rb_erase(&bss->rbn, &dev->bss_tree); | |
139 | kref_put(&bss->ref, bss_release); | |
140 | expired = true; | |
141 | } | |
142 | ||
143 | if (expired) | |
144 | dev->bss_generation++; | |
145 | } | |
146 | ||
c21dbf92 | 147 | const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) |
2a519311 | 148 | { |
c21dbf92 | 149 | while (len > 2 && ies[0] != eid) { |
2a519311 JB |
150 | len -= ies[1] + 2; |
151 | ies += ies[1] + 2; | |
152 | } | |
153 | if (len < 2) | |
154 | return NULL; | |
155 | if (len < 2 + ies[1]) | |
156 | return NULL; | |
157 | return ies; | |
158 | } | |
c21dbf92 | 159 | EXPORT_SYMBOL(cfg80211_find_ie); |
2a519311 JB |
160 | |
161 | static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) | |
162 | { | |
c21dbf92 JB |
163 | const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); |
164 | const u8 *ie2 = cfg80211_find_ie(num, ies2, len2); | |
2a519311 JB |
165 | int r; |
166 | ||
167 | if (!ie1 && !ie2) | |
168 | return 0; | |
cd3468ba | 169 | if (!ie1 || !ie2) |
2a519311 JB |
170 | return -1; |
171 | ||
172 | r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1])); | |
173 | if (r == 0 && ie1[1] != ie2[1]) | |
174 | return ie2[1] - ie1[1]; | |
175 | return r; | |
176 | } | |
177 | ||
178 | static bool is_bss(struct cfg80211_bss *a, | |
179 | const u8 *bssid, | |
180 | const u8 *ssid, size_t ssid_len) | |
181 | { | |
182 | const u8 *ssidie; | |
183 | ||
79420f09 | 184 | if (bssid && compare_ether_addr(a->bssid, bssid)) |
2a519311 JB |
185 | return false; |
186 | ||
79420f09 JB |
187 | if (!ssid) |
188 | return true; | |
189 | ||
c21dbf92 JB |
190 | ssidie = cfg80211_find_ie(WLAN_EID_SSID, |
191 | a->information_elements, | |
192 | a->len_information_elements); | |
2a519311 JB |
193 | if (!ssidie) |
194 | return false; | |
195 | if (ssidie[1] != ssid_len) | |
196 | return false; | |
197 | return memcmp(ssidie + 2, ssid, ssid_len) == 0; | |
198 | } | |
199 | ||
200 | static bool is_mesh(struct cfg80211_bss *a, | |
201 | const u8 *meshid, size_t meshidlen, | |
202 | const u8 *meshcfg) | |
203 | { | |
204 | const u8 *ie; | |
205 | ||
206 | if (!is_zero_ether_addr(a->bssid)) | |
207 | return false; | |
208 | ||
c21dbf92 JB |
209 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, |
210 | a->information_elements, | |
211 | a->len_information_elements); | |
2a519311 JB |
212 | if (!ie) |
213 | return false; | |
214 | if (ie[1] != meshidlen) | |
215 | return false; | |
216 | if (memcmp(ie + 2, meshid, meshidlen)) | |
217 | return false; | |
218 | ||
c21dbf92 JB |
219 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, |
220 | a->information_elements, | |
221 | a->len_information_elements); | |
cd3468ba JB |
222 | if (!ie) |
223 | return false; | |
136cfa28 | 224 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
225 | return false; |
226 | ||
227 | /* | |
228 | * Ignore mesh capability (last two bytes of the IE) when | |
229 | * comparing since that may differ between stations taking | |
230 | * part in the same mesh. | |
231 | */ | |
136cfa28 RP |
232 | return memcmp(ie + 2, meshcfg, |
233 | sizeof(struct ieee80211_meshconf_ie) - 2) == 0; | |
2a519311 JB |
234 | } |
235 | ||
236 | static int cmp_bss(struct cfg80211_bss *a, | |
237 | struct cfg80211_bss *b) | |
238 | { | |
239 | int r; | |
240 | ||
241 | if (a->channel != b->channel) | |
242 | return b->channel->center_freq - a->channel->center_freq; | |
243 | ||
244 | r = memcmp(a->bssid, b->bssid, ETH_ALEN); | |
245 | if (r) | |
246 | return r; | |
247 | ||
248 | if (is_zero_ether_addr(a->bssid)) { | |
249 | r = cmp_ies(WLAN_EID_MESH_ID, | |
250 | a->information_elements, | |
251 | a->len_information_elements, | |
252 | b->information_elements, | |
253 | b->len_information_elements); | |
254 | if (r) | |
255 | return r; | |
256 | return cmp_ies(WLAN_EID_MESH_CONFIG, | |
257 | a->information_elements, | |
258 | a->len_information_elements, | |
259 | b->information_elements, | |
260 | b->len_information_elements); | |
261 | } | |
262 | ||
263 | return cmp_ies(WLAN_EID_SSID, | |
264 | a->information_elements, | |
265 | a->len_information_elements, | |
266 | b->information_elements, | |
267 | b->len_information_elements); | |
268 | } | |
269 | ||
270 | struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, | |
271 | struct ieee80211_channel *channel, | |
272 | const u8 *bssid, | |
79420f09 JB |
273 | const u8 *ssid, size_t ssid_len, |
274 | u16 capa_mask, u16 capa_val) | |
2a519311 JB |
275 | { |
276 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
277 | struct cfg80211_internal_bss *bss, *res = NULL; | |
ccb6c136 | 278 | unsigned long now = jiffies; |
2a519311 JB |
279 | |
280 | spin_lock_bh(&dev->bss_lock); | |
281 | ||
282 | list_for_each_entry(bss, &dev->bss_list, list) { | |
79420f09 JB |
283 | if ((bss->pub.capability & capa_mask) != capa_val) |
284 | continue; | |
2a519311 JB |
285 | if (channel && bss->pub.channel != channel) |
286 | continue; | |
ccb6c136 JB |
287 | /* Don't get expired BSS structs */ |
288 | if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && | |
289 | !atomic_read(&bss->hold)) | |
290 | continue; | |
2a519311 JB |
291 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
292 | res = bss; | |
293 | kref_get(&res->ref); | |
294 | break; | |
295 | } | |
296 | } | |
297 | ||
298 | spin_unlock_bh(&dev->bss_lock); | |
299 | if (!res) | |
300 | return NULL; | |
301 | return &res->pub; | |
302 | } | |
303 | EXPORT_SYMBOL(cfg80211_get_bss); | |
304 | ||
305 | struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, | |
306 | struct ieee80211_channel *channel, | |
307 | const u8 *meshid, size_t meshidlen, | |
308 | const u8 *meshcfg) | |
309 | { | |
310 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
311 | struct cfg80211_internal_bss *bss, *res = NULL; | |
312 | ||
313 | spin_lock_bh(&dev->bss_lock); | |
314 | ||
315 | list_for_each_entry(bss, &dev->bss_list, list) { | |
316 | if (channel && bss->pub.channel != channel) | |
317 | continue; | |
318 | if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { | |
319 | res = bss; | |
320 | kref_get(&res->ref); | |
321 | break; | |
322 | } | |
323 | } | |
324 | ||
325 | spin_unlock_bh(&dev->bss_lock); | |
326 | if (!res) | |
327 | return NULL; | |
328 | return &res->pub; | |
329 | } | |
330 | EXPORT_SYMBOL(cfg80211_get_mesh); | |
331 | ||
332 | ||
333 | static void rb_insert_bss(struct cfg80211_registered_device *dev, | |
334 | struct cfg80211_internal_bss *bss) | |
335 | { | |
336 | struct rb_node **p = &dev->bss_tree.rb_node; | |
337 | struct rb_node *parent = NULL; | |
338 | struct cfg80211_internal_bss *tbss; | |
339 | int cmp; | |
340 | ||
341 | while (*p) { | |
342 | parent = *p; | |
343 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); | |
344 | ||
345 | cmp = cmp_bss(&bss->pub, &tbss->pub); | |
346 | ||
347 | if (WARN_ON(!cmp)) { | |
348 | /* will sort of leak this BSS */ | |
349 | return; | |
350 | } | |
351 | ||
352 | if (cmp < 0) | |
353 | p = &(*p)->rb_left; | |
354 | else | |
355 | p = &(*p)->rb_right; | |
356 | } | |
357 | ||
358 | rb_link_node(&bss->rbn, parent, p); | |
359 | rb_insert_color(&bss->rbn, &dev->bss_tree); | |
360 | } | |
361 | ||
362 | static struct cfg80211_internal_bss * | |
363 | rb_find_bss(struct cfg80211_registered_device *dev, | |
364 | struct cfg80211_internal_bss *res) | |
365 | { | |
366 | struct rb_node *n = dev->bss_tree.rb_node; | |
367 | struct cfg80211_internal_bss *bss; | |
368 | int r; | |
369 | ||
370 | while (n) { | |
371 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); | |
372 | r = cmp_bss(&res->pub, &bss->pub); | |
373 | ||
374 | if (r == 0) | |
375 | return bss; | |
376 | else if (r < 0) | |
377 | n = n->rb_left; | |
378 | else | |
379 | n = n->rb_right; | |
380 | } | |
381 | ||
382 | return NULL; | |
383 | } | |
384 | ||
385 | static struct cfg80211_internal_bss * | |
386 | cfg80211_bss_update(struct cfg80211_registered_device *dev, | |
34a6eddb | 387 | struct cfg80211_internal_bss *res) |
2a519311 JB |
388 | { |
389 | struct cfg80211_internal_bss *found = NULL; | |
390 | const u8 *meshid, *meshcfg; | |
391 | ||
392 | /* | |
393 | * The reference to "res" is donated to this function. | |
394 | */ | |
395 | ||
396 | if (WARN_ON(!res->pub.channel)) { | |
397 | kref_put(&res->ref, bss_release); | |
398 | return NULL; | |
399 | } | |
400 | ||
401 | res->ts = jiffies; | |
402 | ||
403 | if (is_zero_ether_addr(res->pub.bssid)) { | |
404 | /* must be mesh, verify */ | |
c21dbf92 JB |
405 | meshid = cfg80211_find_ie(WLAN_EID_MESH_ID, |
406 | res->pub.information_elements, | |
407 | res->pub.len_information_elements); | |
408 | meshcfg = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
409 | res->pub.information_elements, | |
410 | res->pub.len_information_elements); | |
2a519311 | 411 | if (!meshid || !meshcfg || |
136cfa28 | 412 | meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) { |
2a519311 JB |
413 | /* bogus mesh */ |
414 | kref_put(&res->ref, bss_release); | |
415 | return NULL; | |
416 | } | |
417 | } | |
418 | ||
419 | spin_lock_bh(&dev->bss_lock); | |
420 | ||
421 | found = rb_find_bss(dev, res); | |
422 | ||
cd1658f5 | 423 | if (found) { |
2a519311 JB |
424 | found->pub.beacon_interval = res->pub.beacon_interval; |
425 | found->pub.tsf = res->pub.tsf; | |
426 | found->pub.signal = res->pub.signal; | |
2a519311 JB |
427 | found->pub.capability = res->pub.capability; |
428 | found->ts = res->ts; | |
cd1658f5 | 429 | |
34a6eddb JM |
430 | /* Update IEs */ |
431 | if (res->pub.proberesp_ies) { | |
cd1658f5 | 432 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
34a6eddb JM |
433 | size_t ielen = res->pub.len_proberesp_ies; |
434 | ||
435 | if (found->pub.proberesp_ies && | |
436 | !found->proberesp_ies_allocated && | |
437 | ksize(found) >= used + ielen) { | |
438 | memcpy(found->pub.proberesp_ies, | |
439 | res->pub.proberesp_ies, ielen); | |
440 | found->pub.len_proberesp_ies = ielen; | |
441 | } else { | |
442 | u8 *ies = found->pub.proberesp_ies; | |
443 | ||
444 | if (found->proberesp_ies_allocated) | |
445 | ies = krealloc(ies, ielen, GFP_ATOMIC); | |
446 | else | |
447 | ies = kmalloc(ielen, GFP_ATOMIC); | |
448 | ||
449 | if (ies) { | |
450 | memcpy(ies, res->pub.proberesp_ies, | |
451 | ielen); | |
452 | found->proberesp_ies_allocated = true; | |
453 | found->pub.proberesp_ies = ies; | |
454 | found->pub.len_proberesp_ies = ielen; | |
455 | } | |
456 | } | |
cd1658f5 | 457 | |
34a6eddb JM |
458 | /* Override possible earlier Beacon frame IEs */ |
459 | found->pub.information_elements = | |
460 | found->pub.proberesp_ies; | |
461 | found->pub.len_information_elements = | |
462 | found->pub.len_proberesp_ies; | |
463 | } | |
464 | if (res->pub.beacon_ies) { | |
465 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); | |
466 | size_t ielen = res->pub.len_beacon_ies; | |
01123e23 SN |
467 | bool information_elements_is_beacon_ies = |
468 | (found->pub.information_elements == | |
469 | found->pub.beacon_ies); | |
34a6eddb JM |
470 | |
471 | if (found->pub.beacon_ies && | |
472 | !found->beacon_ies_allocated && | |
473 | ksize(found) >= used + ielen) { | |
474 | memcpy(found->pub.beacon_ies, | |
475 | res->pub.beacon_ies, ielen); | |
476 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 | 477 | } else { |
34a6eddb | 478 | u8 *ies = found->pub.beacon_ies; |
cd1658f5 | 479 | |
34a6eddb | 480 | if (found->beacon_ies_allocated) |
273de92c MB |
481 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
482 | else | |
cd1658f5 JB |
483 | ies = kmalloc(ielen, GFP_ATOMIC); |
484 | ||
485 | if (ies) { | |
34a6eddb JM |
486 | memcpy(ies, res->pub.beacon_ies, |
487 | ielen); | |
488 | found->beacon_ies_allocated = true; | |
489 | found->pub.beacon_ies = ies; | |
490 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 JB |
491 | } |
492 | } | |
01123e23 SN |
493 | |
494 | /* Override IEs if they were from a beacon before */ | |
495 | if (information_elements_is_beacon_ies) { | |
496 | found->pub.information_elements = | |
497 | found->pub.beacon_ies; | |
498 | found->pub.len_information_elements = | |
499 | found->pub.len_beacon_ies; | |
500 | } | |
cd1658f5 JB |
501 | } |
502 | ||
2a519311 JB |
503 | kref_put(&res->ref, bss_release); |
504 | } else { | |
505 | /* this "consumes" the reference */ | |
506 | list_add_tail(&res->list, &dev->bss_list); | |
507 | rb_insert_bss(dev, res); | |
508 | found = res; | |
509 | } | |
510 | ||
511 | dev->bss_generation++; | |
512 | spin_unlock_bh(&dev->bss_lock); | |
513 | ||
514 | kref_get(&found->ref); | |
515 | return found; | |
516 | } | |
517 | ||
06aa7afa JK |
518 | struct cfg80211_bss* |
519 | cfg80211_inform_bss(struct wiphy *wiphy, | |
520 | struct ieee80211_channel *channel, | |
521 | const u8 *bssid, | |
522 | u64 timestamp, u16 capability, u16 beacon_interval, | |
523 | const u8 *ie, size_t ielen, | |
524 | s32 signal, gfp_t gfp) | |
525 | { | |
526 | struct cfg80211_internal_bss *res; | |
527 | size_t privsz; | |
528 | ||
529 | if (WARN_ON(!wiphy)) | |
530 | return NULL; | |
531 | ||
532 | privsz = wiphy->bss_priv_size; | |
533 | ||
22fe88d3 | 534 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
06aa7afa JK |
535 | (signal < 0 || signal > 100))) |
536 | return NULL; | |
537 | ||
538 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); | |
539 | if (!res) | |
540 | return NULL; | |
541 | ||
542 | memcpy(res->pub.bssid, bssid, ETH_ALEN); | |
543 | res->pub.channel = channel; | |
544 | res->pub.signal = signal; | |
545 | res->pub.tsf = timestamp; | |
546 | res->pub.beacon_interval = beacon_interval; | |
547 | res->pub.capability = capability; | |
34a6eddb JM |
548 | /* |
549 | * Since we do not know here whether the IEs are from a Beacon or Probe | |
550 | * Response frame, we need to pick one of the options and only use it | |
551 | * with the driver that does not provide the full Beacon/Probe Response | |
552 | * frame. Use Beacon frame pointer to avoid indicating that this should | |
553 | * override the information_elements pointer should we have received an | |
554 | * earlier indication of Probe Response data. | |
555 | * | |
556 | * The initial buffer for the IEs is allocated with the BSS entry and | |
557 | * is located after the private area. | |
558 | */ | |
559 | res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; | |
560 | memcpy(res->pub.beacon_ies, ie, ielen); | |
561 | res->pub.len_beacon_ies = ielen; | |
562 | res->pub.information_elements = res->pub.beacon_ies; | |
563 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
06aa7afa JK |
564 | |
565 | kref_init(&res->ref); | |
566 | ||
34a6eddb | 567 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
06aa7afa JK |
568 | if (!res) |
569 | return NULL; | |
570 | ||
571 | if (res->pub.capability & WLAN_CAPABILITY_ESS) | |
572 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
573 | ||
574 | /* cfg80211_bss_update gives us a referenced result */ | |
575 | return &res->pub; | |
576 | } | |
577 | EXPORT_SYMBOL(cfg80211_inform_bss); | |
578 | ||
2a519311 JB |
579 | struct cfg80211_bss * |
580 | cfg80211_inform_bss_frame(struct wiphy *wiphy, | |
581 | struct ieee80211_channel *channel, | |
582 | struct ieee80211_mgmt *mgmt, size_t len, | |
77965c97 | 583 | s32 signal, gfp_t gfp) |
2a519311 JB |
584 | { |
585 | struct cfg80211_internal_bss *res; | |
586 | size_t ielen = len - offsetof(struct ieee80211_mgmt, | |
587 | u.probe_resp.variable); | |
2a519311 JB |
588 | size_t privsz = wiphy->bss_priv_size; |
589 | ||
22fe88d3 | 590 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
2a519311 JB |
591 | (signal < 0 || signal > 100))) |
592 | return NULL; | |
593 | ||
594 | if (WARN_ON(!mgmt || !wiphy || | |
595 | len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) | |
596 | return NULL; | |
597 | ||
598 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); | |
599 | if (!res) | |
600 | return NULL; | |
601 | ||
602 | memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); | |
603 | res->pub.channel = channel; | |
2a519311 JB |
604 | res->pub.signal = signal; |
605 | res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); | |
606 | res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); | |
607 | res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); | |
34a6eddb JM |
608 | /* |
609 | * The initial buffer for the IEs is allocated with the BSS entry and | |
610 | * is located after the private area. | |
611 | */ | |
612 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { | |
613 | res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; | |
614 | memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, | |
615 | ielen); | |
616 | res->pub.len_proberesp_ies = ielen; | |
617 | res->pub.information_elements = res->pub.proberesp_ies; | |
618 | res->pub.len_information_elements = res->pub.len_proberesp_ies; | |
619 | } else { | |
620 | res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; | |
621 | memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); | |
622 | res->pub.len_beacon_ies = ielen; | |
623 | res->pub.information_elements = res->pub.beacon_ies; | |
624 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
625 | } | |
2a519311 JB |
626 | |
627 | kref_init(&res->ref); | |
628 | ||
34a6eddb | 629 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
2a519311 JB |
630 | if (!res) |
631 | return NULL; | |
632 | ||
e38f8a7a LR |
633 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
634 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
635 | ||
2a519311 JB |
636 | /* cfg80211_bss_update gives us a referenced result */ |
637 | return &res->pub; | |
638 | } | |
639 | EXPORT_SYMBOL(cfg80211_inform_bss_frame); | |
640 | ||
641 | void cfg80211_put_bss(struct cfg80211_bss *pub) | |
642 | { | |
643 | struct cfg80211_internal_bss *bss; | |
644 | ||
645 | if (!pub) | |
646 | return; | |
647 | ||
648 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
649 | kref_put(&bss->ref, bss_release); | |
650 | } | |
651 | EXPORT_SYMBOL(cfg80211_put_bss); | |
652 | ||
d491af19 JB |
653 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
654 | { | |
655 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
656 | struct cfg80211_internal_bss *bss; | |
657 | ||
658 | if (WARN_ON(!pub)) | |
659 | return; | |
660 | ||
661 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
662 | ||
663 | spin_lock_bh(&dev->bss_lock); | |
3207390a JB |
664 | if (!list_empty(&bss->list)) { |
665 | list_del_init(&bss->list); | |
666 | dev->bss_generation++; | |
667 | rb_erase(&bss->rbn, &dev->bss_tree); | |
d491af19 | 668 | |
3207390a JB |
669 | kref_put(&bss->ref, bss_release); |
670 | } | |
d491af19 | 671 | spin_unlock_bh(&dev->bss_lock); |
d491af19 JB |
672 | } |
673 | EXPORT_SYMBOL(cfg80211_unlink_bss); | |
674 | ||
3d23e349 | 675 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
676 | int cfg80211_wext_siwscan(struct net_device *dev, |
677 | struct iw_request_info *info, | |
678 | union iwreq_data *wrqu, char *extra) | |
679 | { | |
680 | struct cfg80211_registered_device *rdev; | |
681 | struct wiphy *wiphy; | |
682 | struct iw_scan_req *wreq = NULL; | |
65486c8b | 683 | struct cfg80211_scan_request *creq = NULL; |
2a519311 JB |
684 | int i, err, n_channels = 0; |
685 | enum ieee80211_band band; | |
686 | ||
687 | if (!netif_running(dev)) | |
688 | return -ENETDOWN; | |
689 | ||
b2e3abdc HS |
690 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
691 | wreq = (struct iw_scan_req *)extra; | |
692 | ||
463d0183 | 693 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
694 | |
695 | if (IS_ERR(rdev)) | |
696 | return PTR_ERR(rdev); | |
697 | ||
698 | if (rdev->scan_req) { | |
699 | err = -EBUSY; | |
700 | goto out; | |
701 | } | |
702 | ||
703 | wiphy = &rdev->wiphy; | |
704 | ||
b2e3abdc HS |
705 | /* Determine number of channels, needed to allocate creq */ |
706 | if (wreq && wreq->num_channels) | |
707 | n_channels = wreq->num_channels; | |
708 | else { | |
709 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
710 | if (wiphy->bands[band]) | |
711 | n_channels += wiphy->bands[band]->n_channels; | |
712 | } | |
2a519311 JB |
713 | |
714 | creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + | |
715 | n_channels * sizeof(void *), | |
716 | GFP_ATOMIC); | |
717 | if (!creq) { | |
718 | err = -ENOMEM; | |
719 | goto out; | |
720 | } | |
721 | ||
722 | creq->wiphy = wiphy; | |
463d0183 | 723 | creq->dev = dev; |
5ba63533 JB |
724 | /* SSIDs come after channels */ |
725 | creq->ssids = (void *)&creq->channels[n_channels]; | |
2a519311 JB |
726 | creq->n_channels = n_channels; |
727 | creq->n_ssids = 1; | |
728 | ||
b2e3abdc | 729 | /* translate "Scan on frequencies" request */ |
2a519311 JB |
730 | i = 0; |
731 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
732 | int j; | |
584991dc | 733 | |
2a519311 JB |
734 | if (!wiphy->bands[band]) |
735 | continue; | |
584991dc | 736 | |
2a519311 | 737 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
584991dc JB |
738 | /* ignore disabled channels */ |
739 | if (wiphy->bands[band]->channels[j].flags & | |
740 | IEEE80211_CHAN_DISABLED) | |
741 | continue; | |
b2e3abdc HS |
742 | |
743 | /* If we have a wireless request structure and the | |
744 | * wireless request specifies frequencies, then search | |
745 | * for the matching hardware channel. | |
746 | */ | |
747 | if (wreq && wreq->num_channels) { | |
748 | int k; | |
749 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; | |
750 | for (k = 0; k < wreq->num_channels; k++) { | |
a4e7b730 | 751 | int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); |
b2e3abdc HS |
752 | if (wext_freq == wiphy_freq) |
753 | goto wext_freq_found; | |
754 | } | |
755 | goto wext_freq_not_found; | |
756 | } | |
757 | ||
758 | wext_freq_found: | |
2a519311 JB |
759 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
760 | i++; | |
b2e3abdc | 761 | wext_freq_not_found: ; |
2a519311 JB |
762 | } |
763 | } | |
8862dc5f HS |
764 | /* No channels found? */ |
765 | if (!i) { | |
766 | err = -EINVAL; | |
767 | goto out; | |
768 | } | |
2a519311 | 769 | |
b2e3abdc HS |
770 | /* Set real number of channels specified in creq->channels[] */ |
771 | creq->n_channels = i; | |
2a519311 | 772 | |
b2e3abdc HS |
773 | /* translate "Scan for SSID" request */ |
774 | if (wreq) { | |
2a519311 | 775 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
65486c8b JB |
776 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
777 | err = -EINVAL; | |
778 | goto out; | |
779 | } | |
2a519311 JB |
780 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
781 | creq->ssids[0].ssid_len = wreq->essid_len; | |
782 | } | |
783 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) | |
784 | creq->n_ssids = 0; | |
785 | } | |
786 | ||
787 | rdev->scan_req = creq; | |
788 | err = rdev->ops->scan(wiphy, dev, creq); | |
789 | if (err) { | |
790 | rdev->scan_req = NULL; | |
65486c8b | 791 | /* creq will be freed below */ |
463d0183 | 792 | } else { |
a538e2d5 | 793 | nl80211_send_scan_start(rdev, dev); |
65486c8b JB |
794 | /* creq now owned by driver */ |
795 | creq = NULL; | |
463d0183 JB |
796 | dev_hold(dev); |
797 | } | |
2a519311 | 798 | out: |
65486c8b | 799 | kfree(creq); |
4d0c8aea | 800 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
801 | return err; |
802 | } | |
ba44cb72 | 803 | EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); |
2a519311 JB |
804 | |
805 | static void ieee80211_scan_add_ies(struct iw_request_info *info, | |
806 | struct cfg80211_bss *bss, | |
807 | char **current_ev, char *end_buf) | |
808 | { | |
809 | u8 *pos, *end, *next; | |
810 | struct iw_event iwe; | |
811 | ||
812 | if (!bss->information_elements || | |
813 | !bss->len_information_elements) | |
814 | return; | |
815 | ||
816 | /* | |
817 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
818 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
819 | */ | |
820 | pos = bss->information_elements; | |
821 | end = pos + bss->len_information_elements; | |
822 | ||
823 | while (end - pos > IW_GENERIC_IE_MAX) { | |
824 | next = pos + 2 + pos[1]; | |
825 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
826 | next = next + 2 + next[1]; | |
827 | ||
828 | memset(&iwe, 0, sizeof(iwe)); | |
829 | iwe.cmd = IWEVGENIE; | |
830 | iwe.u.data.length = next - pos; | |
831 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
832 | end_buf, &iwe, pos); | |
833 | ||
834 | pos = next; | |
835 | } | |
836 | ||
837 | if (end > pos) { | |
838 | memset(&iwe, 0, sizeof(iwe)); | |
839 | iwe.cmd = IWEVGENIE; | |
840 | iwe.u.data.length = end - pos; | |
841 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
842 | end_buf, &iwe, pos); | |
843 | } | |
844 | } | |
845 | ||
cb3a8eec DW |
846 | static inline unsigned int elapsed_jiffies_msecs(unsigned long start) |
847 | { | |
848 | unsigned long end = jiffies; | |
849 | ||
850 | if (end >= start) | |
851 | return jiffies_to_msecs(end - start); | |
852 | ||
853 | return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); | |
854 | } | |
2a519311 JB |
855 | |
856 | static char * | |
77965c97 JB |
857 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
858 | struct cfg80211_internal_bss *bss, char *current_ev, | |
859 | char *end_buf) | |
2a519311 JB |
860 | { |
861 | struct iw_event iwe; | |
862 | u8 *buf, *cfg, *p; | |
863 | u8 *ie = bss->pub.information_elements; | |
a77b8552 | 864 | int rem = bss->pub.len_information_elements, i, sig; |
2a519311 JB |
865 | bool ismesh = false; |
866 | ||
867 | memset(&iwe, 0, sizeof(iwe)); | |
868 | iwe.cmd = SIOCGIWAP; | |
869 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
870 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); | |
871 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
872 | IW_EV_ADDR_LEN); | |
873 | ||
874 | memset(&iwe, 0, sizeof(iwe)); | |
875 | iwe.cmd = SIOCGIWFREQ; | |
876 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); | |
877 | iwe.u.freq.e = 0; | |
878 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
879 | IW_EV_FREQ_LEN); | |
880 | ||
881 | memset(&iwe, 0, sizeof(iwe)); | |
882 | iwe.cmd = SIOCGIWFREQ; | |
883 | iwe.u.freq.m = bss->pub.channel->center_freq; | |
884 | iwe.u.freq.e = 6; | |
885 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
886 | IW_EV_FREQ_LEN); | |
887 | ||
77965c97 | 888 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
2a519311 JB |
889 | memset(&iwe, 0, sizeof(iwe)); |
890 | iwe.cmd = IWEVQUAL; | |
891 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | | |
892 | IW_QUAL_NOISE_INVALID | | |
a77b8552 | 893 | IW_QUAL_QUAL_UPDATED; |
77965c97 | 894 | switch (wiphy->signal_type) { |
2a519311 | 895 | case CFG80211_SIGNAL_TYPE_MBM: |
a77b8552 JB |
896 | sig = bss->pub.signal / 100; |
897 | iwe.u.qual.level = sig; | |
2a519311 | 898 | iwe.u.qual.updated |= IW_QUAL_DBM; |
a77b8552 JB |
899 | if (sig < -110) /* rather bad */ |
900 | sig = -110; | |
901 | else if (sig > -40) /* perfect */ | |
902 | sig = -40; | |
903 | /* will give a range of 0 .. 70 */ | |
904 | iwe.u.qual.qual = sig + 110; | |
2a519311 JB |
905 | break; |
906 | case CFG80211_SIGNAL_TYPE_UNSPEC: | |
907 | iwe.u.qual.level = bss->pub.signal; | |
a77b8552 JB |
908 | /* will give range 0 .. 100 */ |
909 | iwe.u.qual.qual = bss->pub.signal; | |
2a519311 JB |
910 | break; |
911 | default: | |
912 | /* not reached */ | |
913 | break; | |
914 | } | |
915 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
916 | &iwe, IW_EV_QUAL_LEN); | |
917 | } | |
918 | ||
919 | memset(&iwe, 0, sizeof(iwe)); | |
920 | iwe.cmd = SIOCGIWENCODE; | |
921 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) | |
922 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
923 | else | |
924 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
925 | iwe.u.data.length = 0; | |
926 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
927 | &iwe, ""); | |
928 | ||
929 | while (rem >= 2) { | |
930 | /* invalid data */ | |
931 | if (ie[1] > rem - 2) | |
932 | break; | |
933 | ||
934 | switch (ie[0]) { | |
935 | case WLAN_EID_SSID: | |
936 | memset(&iwe, 0, sizeof(iwe)); | |
937 | iwe.cmd = SIOCGIWESSID; | |
938 | iwe.u.data.length = ie[1]; | |
939 | iwe.u.data.flags = 1; | |
940 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
941 | &iwe, ie + 2); | |
942 | break; | |
943 | case WLAN_EID_MESH_ID: | |
944 | memset(&iwe, 0, sizeof(iwe)); | |
945 | iwe.cmd = SIOCGIWESSID; | |
946 | iwe.u.data.length = ie[1]; | |
947 | iwe.u.data.flags = 1; | |
948 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
949 | &iwe, ie + 2); | |
950 | break; | |
951 | case WLAN_EID_MESH_CONFIG: | |
952 | ismesh = true; | |
136cfa28 | 953 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
954 | break; |
955 | buf = kmalloc(50, GFP_ATOMIC); | |
956 | if (!buf) | |
957 | break; | |
958 | cfg = ie + 2; | |
959 | memset(&iwe, 0, sizeof(iwe)); | |
960 | iwe.cmd = IWEVCUSTOM; | |
76aa5e70 RP |
961 | sprintf(buf, "Mesh Network Path Selection Protocol ID: " |
962 | "0x%02X", cfg[0]); | |
2a519311 JB |
963 | iwe.u.data.length = strlen(buf); |
964 | current_ev = iwe_stream_add_point(info, current_ev, | |
965 | end_buf, | |
966 | &iwe, buf); | |
76aa5e70 RP |
967 | sprintf(buf, "Path Selection Metric ID: 0x%02X", |
968 | cfg[1]); | |
2a519311 JB |
969 | iwe.u.data.length = strlen(buf); |
970 | current_ev = iwe_stream_add_point(info, current_ev, | |
971 | end_buf, | |
972 | &iwe, buf); | |
76aa5e70 RP |
973 | sprintf(buf, "Congestion Control Mode ID: 0x%02X", |
974 | cfg[2]); | |
2a519311 JB |
975 | iwe.u.data.length = strlen(buf); |
976 | current_ev = iwe_stream_add_point(info, current_ev, | |
977 | end_buf, | |
978 | &iwe, buf); | |
76aa5e70 | 979 | sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); |
2a519311 JB |
980 | iwe.u.data.length = strlen(buf); |
981 | current_ev = iwe_stream_add_point(info, current_ev, | |
982 | end_buf, | |
983 | &iwe, buf); | |
76aa5e70 RP |
984 | sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); |
985 | iwe.u.data.length = strlen(buf); | |
986 | current_ev = iwe_stream_add_point(info, current_ev, | |
987 | end_buf, | |
988 | &iwe, buf); | |
989 | sprintf(buf, "Formation Info: 0x%02X", cfg[5]); | |
990 | iwe.u.data.length = strlen(buf); | |
991 | current_ev = iwe_stream_add_point(info, current_ev, | |
992 | end_buf, | |
993 | &iwe, buf); | |
994 | sprintf(buf, "Capabilities: 0x%02X", cfg[6]); | |
2a519311 JB |
995 | iwe.u.data.length = strlen(buf); |
996 | current_ev = iwe_stream_add_point(info, current_ev, | |
997 | end_buf, | |
998 | &iwe, buf); | |
999 | kfree(buf); | |
1000 | break; | |
1001 | case WLAN_EID_SUPP_RATES: | |
1002 | case WLAN_EID_EXT_SUPP_RATES: | |
1003 | /* display all supported rates in readable format */ | |
1004 | p = current_ev + iwe_stream_lcp_len(info); | |
1005 | ||
1006 | memset(&iwe, 0, sizeof(iwe)); | |
1007 | iwe.cmd = SIOCGIWRATE; | |
1008 | /* Those two flags are ignored... */ | |
1009 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
1010 | ||
1011 | for (i = 0; i < ie[1]; i++) { | |
1012 | iwe.u.bitrate.value = | |
1013 | ((ie[i + 2] & 0x7f) * 500000); | |
1014 | p = iwe_stream_add_value(info, current_ev, p, | |
1015 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
1016 | } | |
1017 | current_ev = p; | |
1018 | break; | |
1019 | } | |
1020 | rem -= ie[1] + 2; | |
1021 | ie += ie[1] + 2; | |
1022 | } | |
1023 | ||
f64f9e71 JP |
1024 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
1025 | ismesh) { | |
2a519311 JB |
1026 | memset(&iwe, 0, sizeof(iwe)); |
1027 | iwe.cmd = SIOCGIWMODE; | |
1028 | if (ismesh) | |
1029 | iwe.u.mode = IW_MODE_MESH; | |
1030 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) | |
1031 | iwe.u.mode = IW_MODE_MASTER; | |
1032 | else | |
1033 | iwe.u.mode = IW_MODE_ADHOC; | |
1034 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
1035 | &iwe, IW_EV_UINT_LEN); | |
1036 | } | |
1037 | ||
1038 | buf = kmalloc(30, GFP_ATOMIC); | |
1039 | if (buf) { | |
1040 | memset(&iwe, 0, sizeof(iwe)); | |
1041 | iwe.cmd = IWEVCUSTOM; | |
1042 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); | |
1043 | iwe.u.data.length = strlen(buf); | |
1044 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1045 | &iwe, buf); | |
1046 | memset(&iwe, 0, sizeof(iwe)); | |
1047 | iwe.cmd = IWEVCUSTOM; | |
cb3a8eec DW |
1048 | sprintf(buf, " Last beacon: %ums ago", |
1049 | elapsed_jiffies_msecs(bss->ts)); | |
2a519311 JB |
1050 | iwe.u.data.length = strlen(buf); |
1051 | current_ev = iwe_stream_add_point(info, current_ev, | |
1052 | end_buf, &iwe, buf); | |
1053 | kfree(buf); | |
1054 | } | |
1055 | ||
1056 | ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); | |
1057 | ||
1058 | return current_ev; | |
1059 | } | |
1060 | ||
1061 | ||
1062 | static int ieee80211_scan_results(struct cfg80211_registered_device *dev, | |
1063 | struct iw_request_info *info, | |
1064 | char *buf, size_t len) | |
1065 | { | |
1066 | char *current_ev = buf; | |
1067 | char *end_buf = buf + len; | |
1068 | struct cfg80211_internal_bss *bss; | |
1069 | ||
1070 | spin_lock_bh(&dev->bss_lock); | |
1071 | cfg80211_bss_expire(dev); | |
1072 | ||
1073 | list_for_each_entry(bss, &dev->bss_list, list) { | |
1074 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
1075 | spin_unlock_bh(&dev->bss_lock); | |
1076 | return -E2BIG; | |
1077 | } | |
77965c97 JB |
1078 | current_ev = ieee80211_bss(&dev->wiphy, info, bss, |
1079 | current_ev, end_buf); | |
2a519311 JB |
1080 | } |
1081 | spin_unlock_bh(&dev->bss_lock); | |
1082 | return current_ev - buf; | |
1083 | } | |
1084 | ||
1085 | ||
1086 | int cfg80211_wext_giwscan(struct net_device *dev, | |
1087 | struct iw_request_info *info, | |
1088 | struct iw_point *data, char *extra) | |
1089 | { | |
1090 | struct cfg80211_registered_device *rdev; | |
1091 | int res; | |
1092 | ||
1093 | if (!netif_running(dev)) | |
1094 | return -ENETDOWN; | |
1095 | ||
463d0183 | 1096 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
1097 | |
1098 | if (IS_ERR(rdev)) | |
1099 | return PTR_ERR(rdev); | |
1100 | ||
1101 | if (rdev->scan_req) { | |
1102 | res = -EAGAIN; | |
1103 | goto out; | |
1104 | } | |
1105 | ||
1106 | res = ieee80211_scan_results(rdev, info, extra, data->length); | |
1107 | data->length = 0; | |
1108 | if (res >= 0) { | |
1109 | data->length = res; | |
1110 | res = 0; | |
1111 | } | |
1112 | ||
1113 | out: | |
4d0c8aea | 1114 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
1115 | return res; |
1116 | } | |
ba44cb72 | 1117 | EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); |
2a519311 | 1118 | #endif |