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 | ||
807f8a8c LC |
96 | void __cfg80211_sched_scan_results(struct work_struct *wk) |
97 | { | |
98 | struct cfg80211_registered_device *rdev; | |
99 | ||
100 | rdev = container_of(wk, struct cfg80211_registered_device, | |
101 | sched_scan_results_wk); | |
102 | ||
c10841ca | 103 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c LC |
104 | |
105 | /* we don't have sched_scan_req anymore if the scan is stopping */ | |
106 | if (rdev->sched_scan_req) | |
107 | nl80211_send_sched_scan_results(rdev, | |
108 | rdev->sched_scan_req->dev); | |
109 | ||
c10841ca | 110 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c LC |
111 | } |
112 | ||
113 | void cfg80211_sched_scan_results(struct wiphy *wiphy) | |
114 | { | |
115 | /* ignore if we're not scanning */ | |
116 | if (wiphy_to_dev(wiphy)->sched_scan_req) | |
117 | queue_work(cfg80211_wq, | |
118 | &wiphy_to_dev(wiphy)->sched_scan_results_wk); | |
119 | } | |
120 | EXPORT_SYMBOL(cfg80211_sched_scan_results); | |
121 | ||
85a9994a | 122 | void cfg80211_sched_scan_stopped(struct wiphy *wiphy) |
807f8a8c | 123 | { |
85a9994a | 124 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
807f8a8c | 125 | |
c10841ca | 126 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c | 127 | __cfg80211_stop_sched_scan(rdev, true); |
c10841ca | 128 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c | 129 | } |
807f8a8c LC |
130 | EXPORT_SYMBOL(cfg80211_sched_scan_stopped); |
131 | ||
132 | int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, | |
133 | bool driver_initiated) | |
134 | { | |
807f8a8c LC |
135 | struct net_device *dev; |
136 | ||
c10841ca | 137 | lockdep_assert_held(&rdev->sched_scan_mtx); |
807f8a8c LC |
138 | |
139 | if (!rdev->sched_scan_req) | |
1a84ff75 | 140 | return -ENOENT; |
807f8a8c LC |
141 | |
142 | dev = rdev->sched_scan_req->dev; | |
143 | ||
85a9994a | 144 | if (!driver_initiated) { |
3b4670ff | 145 | int err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev); |
85a9994a LC |
146 | if (err) |
147 | return err; | |
148 | } | |
807f8a8c LC |
149 | |
150 | nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED); | |
151 | ||
152 | kfree(rdev->sched_scan_req); | |
153 | rdev->sched_scan_req = NULL; | |
154 | ||
3b4670ff | 155 | return 0; |
807f8a8c LC |
156 | } |
157 | ||
2a519311 JB |
158 | static void bss_release(struct kref *ref) |
159 | { | |
160 | struct cfg80211_internal_bss *bss; | |
161 | ||
162 | bss = container_of(ref, struct cfg80211_internal_bss, ref); | |
78c1c7e1 JB |
163 | if (bss->pub.free_priv) |
164 | bss->pub.free_priv(&bss->pub); | |
cd1658f5 | 165 | |
34a6eddb JM |
166 | if (bss->beacon_ies_allocated) |
167 | kfree(bss->pub.beacon_ies); | |
168 | if (bss->proberesp_ies_allocated) | |
169 | kfree(bss->pub.proberesp_ies); | |
cd1658f5 | 170 | |
19957bb3 JB |
171 | BUG_ON(atomic_read(&bss->hold)); |
172 | ||
2a519311 JB |
173 | kfree(bss); |
174 | } | |
175 | ||
cb3a8eec DW |
176 | /* must hold dev->bss_lock! */ |
177 | void cfg80211_bss_age(struct cfg80211_registered_device *dev, | |
178 | unsigned long age_secs) | |
179 | { | |
180 | struct cfg80211_internal_bss *bss; | |
181 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
182 | ||
183 | list_for_each_entry(bss, &dev->bss_list, list) { | |
184 | bss->ts -= age_jiffies; | |
185 | } | |
186 | } | |
187 | ||
2b78ac9b JO |
188 | /* must hold dev->bss_lock! */ |
189 | static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev, | |
190 | struct cfg80211_internal_bss *bss) | |
191 | { | |
192 | list_del_init(&bss->list); | |
193 | rb_erase(&bss->rbn, &dev->bss_tree); | |
194 | kref_put(&bss->ref, bss_release); | |
195 | } | |
196 | ||
2a519311 JB |
197 | /* must hold dev->bss_lock! */ |
198 | void cfg80211_bss_expire(struct cfg80211_registered_device *dev) | |
199 | { | |
200 | struct cfg80211_internal_bss *bss, *tmp; | |
201 | bool expired = false; | |
202 | ||
203 | list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { | |
19957bb3 JB |
204 | if (atomic_read(&bss->hold)) |
205 | continue; | |
206 | if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2a519311 | 207 | continue; |
2b78ac9b | 208 | __cfg80211_unlink_bss(dev, bss); |
2a519311 JB |
209 | expired = true; |
210 | } | |
211 | ||
212 | if (expired) | |
213 | dev->bss_generation++; | |
214 | } | |
215 | ||
c21dbf92 | 216 | const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) |
2a519311 | 217 | { |
c21dbf92 | 218 | while (len > 2 && ies[0] != eid) { |
2a519311 JB |
219 | len -= ies[1] + 2; |
220 | ies += ies[1] + 2; | |
221 | } | |
222 | if (len < 2) | |
223 | return NULL; | |
224 | if (len < 2 + ies[1]) | |
225 | return NULL; | |
226 | return ies; | |
227 | } | |
c21dbf92 | 228 | EXPORT_SYMBOL(cfg80211_find_ie); |
2a519311 JB |
229 | |
230 | static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) | |
231 | { | |
c21dbf92 JB |
232 | const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); |
233 | const u8 *ie2 = cfg80211_find_ie(num, ies2, len2); | |
2a519311 JB |
234 | int r; |
235 | ||
236 | if (!ie1 && !ie2) | |
237 | return 0; | |
cd3468ba | 238 | if (!ie1 || !ie2) |
2a519311 JB |
239 | return -1; |
240 | ||
241 | r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1])); | |
242 | if (r == 0 && ie1[1] != ie2[1]) | |
243 | return ie2[1] - ie1[1]; | |
244 | return r; | |
245 | } | |
246 | ||
247 | static bool is_bss(struct cfg80211_bss *a, | |
248 | const u8 *bssid, | |
249 | const u8 *ssid, size_t ssid_len) | |
250 | { | |
251 | const u8 *ssidie; | |
252 | ||
79420f09 | 253 | if (bssid && compare_ether_addr(a->bssid, bssid)) |
2a519311 JB |
254 | return false; |
255 | ||
79420f09 JB |
256 | if (!ssid) |
257 | return true; | |
258 | ||
c21dbf92 JB |
259 | ssidie = cfg80211_find_ie(WLAN_EID_SSID, |
260 | a->information_elements, | |
261 | a->len_information_elements); | |
2a519311 JB |
262 | if (!ssidie) |
263 | return false; | |
264 | if (ssidie[1] != ssid_len) | |
265 | return false; | |
266 | return memcmp(ssidie + 2, ssid, ssid_len) == 0; | |
267 | } | |
268 | ||
333ba732 EP |
269 | static bool is_mesh_bss(struct cfg80211_bss *a) |
270 | { | |
271 | const u8 *ie; | |
272 | ||
273 | if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) | |
274 | return false; | |
275 | ||
276 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, | |
277 | a->information_elements, | |
278 | a->len_information_elements); | |
279 | if (!ie) | |
280 | return false; | |
281 | ||
282 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
283 | a->information_elements, | |
284 | a->len_information_elements); | |
285 | if (!ie) | |
286 | return false; | |
287 | ||
288 | return true; | |
289 | } | |
290 | ||
2a519311 JB |
291 | static bool is_mesh(struct cfg80211_bss *a, |
292 | const u8 *meshid, size_t meshidlen, | |
293 | const u8 *meshcfg) | |
294 | { | |
295 | const u8 *ie; | |
296 | ||
333ba732 | 297 | if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) |
2a519311 JB |
298 | return false; |
299 | ||
c21dbf92 JB |
300 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, |
301 | a->information_elements, | |
302 | a->len_information_elements); | |
2a519311 JB |
303 | if (!ie) |
304 | return false; | |
305 | if (ie[1] != meshidlen) | |
306 | return false; | |
307 | if (memcmp(ie + 2, meshid, meshidlen)) | |
308 | return false; | |
309 | ||
c21dbf92 JB |
310 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, |
311 | a->information_elements, | |
312 | a->len_information_elements); | |
cd3468ba JB |
313 | if (!ie) |
314 | return false; | |
136cfa28 | 315 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
316 | return false; |
317 | ||
318 | /* | |
319 | * Ignore mesh capability (last two bytes of the IE) when | |
320 | * comparing since that may differ between stations taking | |
321 | * part in the same mesh. | |
322 | */ | |
136cfa28 RP |
323 | return memcmp(ie + 2, meshcfg, |
324 | sizeof(struct ieee80211_meshconf_ie) - 2) == 0; | |
2a519311 JB |
325 | } |
326 | ||
327 | static int cmp_bss(struct cfg80211_bss *a, | |
328 | struct cfg80211_bss *b) | |
329 | { | |
330 | int r; | |
331 | ||
332 | if (a->channel != b->channel) | |
333 | return b->channel->center_freq - a->channel->center_freq; | |
334 | ||
333ba732 | 335 | if (is_mesh_bss(a) && is_mesh_bss(b)) { |
2a519311 JB |
336 | r = cmp_ies(WLAN_EID_MESH_ID, |
337 | a->information_elements, | |
338 | a->len_information_elements, | |
339 | b->information_elements, | |
340 | b->len_information_elements); | |
341 | if (r) | |
342 | return r; | |
343 | return cmp_ies(WLAN_EID_MESH_CONFIG, | |
344 | a->information_elements, | |
345 | a->len_information_elements, | |
346 | b->information_elements, | |
347 | b->len_information_elements); | |
348 | } | |
349 | ||
0a35d36d JC |
350 | r = memcmp(a->bssid, b->bssid, ETH_ALEN); |
351 | if (r) | |
352 | return r; | |
353 | ||
2a519311 JB |
354 | return cmp_ies(WLAN_EID_SSID, |
355 | a->information_elements, | |
356 | a->len_information_elements, | |
357 | b->information_elements, | |
358 | b->len_information_elements); | |
359 | } | |
360 | ||
361 | struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, | |
362 | struct ieee80211_channel *channel, | |
363 | const u8 *bssid, | |
79420f09 JB |
364 | const u8 *ssid, size_t ssid_len, |
365 | u16 capa_mask, u16 capa_val) | |
2a519311 JB |
366 | { |
367 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
368 | struct cfg80211_internal_bss *bss, *res = NULL; | |
ccb6c136 | 369 | unsigned long now = jiffies; |
2a519311 JB |
370 | |
371 | spin_lock_bh(&dev->bss_lock); | |
372 | ||
373 | list_for_each_entry(bss, &dev->bss_list, list) { | |
79420f09 JB |
374 | if ((bss->pub.capability & capa_mask) != capa_val) |
375 | continue; | |
2a519311 JB |
376 | if (channel && bss->pub.channel != channel) |
377 | continue; | |
ccb6c136 JB |
378 | /* Don't get expired BSS structs */ |
379 | if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && | |
380 | !atomic_read(&bss->hold)) | |
381 | continue; | |
2a519311 JB |
382 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
383 | res = bss; | |
384 | kref_get(&res->ref); | |
385 | break; | |
386 | } | |
387 | } | |
388 | ||
389 | spin_unlock_bh(&dev->bss_lock); | |
390 | if (!res) | |
391 | return NULL; | |
392 | return &res->pub; | |
393 | } | |
394 | EXPORT_SYMBOL(cfg80211_get_bss); | |
395 | ||
396 | struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, | |
397 | struct ieee80211_channel *channel, | |
398 | const u8 *meshid, size_t meshidlen, | |
399 | const u8 *meshcfg) | |
400 | { | |
401 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
402 | struct cfg80211_internal_bss *bss, *res = NULL; | |
403 | ||
404 | spin_lock_bh(&dev->bss_lock); | |
405 | ||
406 | list_for_each_entry(bss, &dev->bss_list, list) { | |
407 | if (channel && bss->pub.channel != channel) | |
408 | continue; | |
409 | if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { | |
410 | res = bss; | |
411 | kref_get(&res->ref); | |
412 | break; | |
413 | } | |
414 | } | |
415 | ||
416 | spin_unlock_bh(&dev->bss_lock); | |
417 | if (!res) | |
418 | return NULL; | |
419 | return &res->pub; | |
420 | } | |
421 | EXPORT_SYMBOL(cfg80211_get_mesh); | |
422 | ||
423 | ||
424 | static void rb_insert_bss(struct cfg80211_registered_device *dev, | |
425 | struct cfg80211_internal_bss *bss) | |
426 | { | |
427 | struct rb_node **p = &dev->bss_tree.rb_node; | |
428 | struct rb_node *parent = NULL; | |
429 | struct cfg80211_internal_bss *tbss; | |
430 | int cmp; | |
431 | ||
432 | while (*p) { | |
433 | parent = *p; | |
434 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); | |
435 | ||
436 | cmp = cmp_bss(&bss->pub, &tbss->pub); | |
437 | ||
438 | if (WARN_ON(!cmp)) { | |
439 | /* will sort of leak this BSS */ | |
440 | return; | |
441 | } | |
442 | ||
443 | if (cmp < 0) | |
444 | p = &(*p)->rb_left; | |
445 | else | |
446 | p = &(*p)->rb_right; | |
447 | } | |
448 | ||
449 | rb_link_node(&bss->rbn, parent, p); | |
450 | rb_insert_color(&bss->rbn, &dev->bss_tree); | |
451 | } | |
452 | ||
453 | static struct cfg80211_internal_bss * | |
454 | rb_find_bss(struct cfg80211_registered_device *dev, | |
455 | struct cfg80211_internal_bss *res) | |
456 | { | |
457 | struct rb_node *n = dev->bss_tree.rb_node; | |
458 | struct cfg80211_internal_bss *bss; | |
459 | int r; | |
460 | ||
461 | while (n) { | |
462 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); | |
463 | r = cmp_bss(&res->pub, &bss->pub); | |
464 | ||
465 | if (r == 0) | |
466 | return bss; | |
467 | else if (r < 0) | |
468 | n = n->rb_left; | |
469 | else | |
470 | n = n->rb_right; | |
471 | } | |
472 | ||
473 | return NULL; | |
474 | } | |
475 | ||
476 | static struct cfg80211_internal_bss * | |
477 | cfg80211_bss_update(struct cfg80211_registered_device *dev, | |
34a6eddb | 478 | struct cfg80211_internal_bss *res) |
2a519311 JB |
479 | { |
480 | struct cfg80211_internal_bss *found = NULL; | |
2a519311 JB |
481 | |
482 | /* | |
483 | * The reference to "res" is donated to this function. | |
484 | */ | |
485 | ||
486 | if (WARN_ON(!res->pub.channel)) { | |
487 | kref_put(&res->ref, bss_release); | |
488 | return NULL; | |
489 | } | |
490 | ||
491 | res->ts = jiffies; | |
492 | ||
2a519311 JB |
493 | spin_lock_bh(&dev->bss_lock); |
494 | ||
495 | found = rb_find_bss(dev, res); | |
496 | ||
cd1658f5 | 497 | if (found) { |
2a519311 JB |
498 | found->pub.beacon_interval = res->pub.beacon_interval; |
499 | found->pub.tsf = res->pub.tsf; | |
500 | found->pub.signal = res->pub.signal; | |
2a519311 JB |
501 | found->pub.capability = res->pub.capability; |
502 | found->ts = res->ts; | |
cd1658f5 | 503 | |
34a6eddb JM |
504 | /* Update IEs */ |
505 | if (res->pub.proberesp_ies) { | |
cd1658f5 | 506 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
34a6eddb JM |
507 | size_t ielen = res->pub.len_proberesp_ies; |
508 | ||
509 | if (found->pub.proberesp_ies && | |
510 | !found->proberesp_ies_allocated && | |
511 | ksize(found) >= used + ielen) { | |
512 | memcpy(found->pub.proberesp_ies, | |
513 | res->pub.proberesp_ies, ielen); | |
514 | found->pub.len_proberesp_ies = ielen; | |
515 | } else { | |
516 | u8 *ies = found->pub.proberesp_ies; | |
517 | ||
518 | if (found->proberesp_ies_allocated) | |
519 | ies = krealloc(ies, ielen, GFP_ATOMIC); | |
520 | else | |
521 | ies = kmalloc(ielen, GFP_ATOMIC); | |
522 | ||
523 | if (ies) { | |
524 | memcpy(ies, res->pub.proberesp_ies, | |
525 | ielen); | |
526 | found->proberesp_ies_allocated = true; | |
527 | found->pub.proberesp_ies = ies; | |
528 | found->pub.len_proberesp_ies = ielen; | |
529 | } | |
530 | } | |
cd1658f5 | 531 | |
34a6eddb JM |
532 | /* Override possible earlier Beacon frame IEs */ |
533 | found->pub.information_elements = | |
534 | found->pub.proberesp_ies; | |
535 | found->pub.len_information_elements = | |
536 | found->pub.len_proberesp_ies; | |
537 | } | |
538 | if (res->pub.beacon_ies) { | |
539 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); | |
540 | size_t ielen = res->pub.len_beacon_ies; | |
01123e23 SN |
541 | bool information_elements_is_beacon_ies = |
542 | (found->pub.information_elements == | |
543 | found->pub.beacon_ies); | |
34a6eddb JM |
544 | |
545 | if (found->pub.beacon_ies && | |
546 | !found->beacon_ies_allocated && | |
547 | ksize(found) >= used + ielen) { | |
548 | memcpy(found->pub.beacon_ies, | |
549 | res->pub.beacon_ies, ielen); | |
550 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 | 551 | } else { |
34a6eddb | 552 | u8 *ies = found->pub.beacon_ies; |
cd1658f5 | 553 | |
34a6eddb | 554 | if (found->beacon_ies_allocated) |
273de92c MB |
555 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
556 | else | |
cd1658f5 JB |
557 | ies = kmalloc(ielen, GFP_ATOMIC); |
558 | ||
559 | if (ies) { | |
34a6eddb JM |
560 | memcpy(ies, res->pub.beacon_ies, |
561 | ielen); | |
562 | found->beacon_ies_allocated = true; | |
563 | found->pub.beacon_ies = ies; | |
564 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 JB |
565 | } |
566 | } | |
01123e23 SN |
567 | |
568 | /* Override IEs if they were from a beacon before */ | |
569 | if (information_elements_is_beacon_ies) { | |
570 | found->pub.information_elements = | |
571 | found->pub.beacon_ies; | |
572 | found->pub.len_information_elements = | |
573 | found->pub.len_beacon_ies; | |
574 | } | |
cd1658f5 JB |
575 | } |
576 | ||
2a519311 JB |
577 | kref_put(&res->ref, bss_release); |
578 | } else { | |
579 | /* this "consumes" the reference */ | |
580 | list_add_tail(&res->list, &dev->bss_list); | |
581 | rb_insert_bss(dev, res); | |
582 | found = res; | |
583 | } | |
584 | ||
585 | dev->bss_generation++; | |
586 | spin_unlock_bh(&dev->bss_lock); | |
587 | ||
588 | kref_get(&found->ref); | |
589 | return found; | |
590 | } | |
591 | ||
06aa7afa JK |
592 | struct cfg80211_bss* |
593 | cfg80211_inform_bss(struct wiphy *wiphy, | |
594 | struct ieee80211_channel *channel, | |
595 | const u8 *bssid, | |
596 | u64 timestamp, u16 capability, u16 beacon_interval, | |
597 | const u8 *ie, size_t ielen, | |
598 | s32 signal, gfp_t gfp) | |
599 | { | |
600 | struct cfg80211_internal_bss *res; | |
601 | size_t privsz; | |
602 | ||
603 | if (WARN_ON(!wiphy)) | |
604 | return NULL; | |
605 | ||
606 | privsz = wiphy->bss_priv_size; | |
607 | ||
22fe88d3 | 608 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
06aa7afa JK |
609 | (signal < 0 || signal > 100))) |
610 | return NULL; | |
611 | ||
612 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); | |
613 | if (!res) | |
614 | return NULL; | |
615 | ||
616 | memcpy(res->pub.bssid, bssid, ETH_ALEN); | |
617 | res->pub.channel = channel; | |
618 | res->pub.signal = signal; | |
619 | res->pub.tsf = timestamp; | |
620 | res->pub.beacon_interval = beacon_interval; | |
621 | res->pub.capability = capability; | |
34a6eddb JM |
622 | /* |
623 | * Since we do not know here whether the IEs are from a Beacon or Probe | |
624 | * Response frame, we need to pick one of the options and only use it | |
625 | * with the driver that does not provide the full Beacon/Probe Response | |
626 | * frame. Use Beacon frame pointer to avoid indicating that this should | |
627 | * override the information_elements pointer should we have received an | |
628 | * earlier indication of Probe Response data. | |
629 | * | |
630 | * The initial buffer for the IEs is allocated with the BSS entry and | |
631 | * is located after the private area. | |
632 | */ | |
633 | res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; | |
634 | memcpy(res->pub.beacon_ies, ie, ielen); | |
635 | res->pub.len_beacon_ies = ielen; | |
636 | res->pub.information_elements = res->pub.beacon_ies; | |
637 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
06aa7afa JK |
638 | |
639 | kref_init(&res->ref); | |
640 | ||
34a6eddb | 641 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
06aa7afa JK |
642 | if (!res) |
643 | return NULL; | |
644 | ||
645 | if (res->pub.capability & WLAN_CAPABILITY_ESS) | |
646 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
647 | ||
648 | /* cfg80211_bss_update gives us a referenced result */ | |
649 | return &res->pub; | |
650 | } | |
651 | EXPORT_SYMBOL(cfg80211_inform_bss); | |
652 | ||
2a519311 JB |
653 | struct cfg80211_bss * |
654 | cfg80211_inform_bss_frame(struct wiphy *wiphy, | |
655 | struct ieee80211_channel *channel, | |
656 | struct ieee80211_mgmt *mgmt, size_t len, | |
77965c97 | 657 | s32 signal, gfp_t gfp) |
2a519311 JB |
658 | { |
659 | struct cfg80211_internal_bss *res; | |
660 | size_t ielen = len - offsetof(struct ieee80211_mgmt, | |
661 | u.probe_resp.variable); | |
bef9bacc MK |
662 | size_t privsz; |
663 | ||
664 | if (WARN_ON(!mgmt)) | |
665 | return NULL; | |
666 | ||
667 | if (WARN_ON(!wiphy)) | |
668 | return NULL; | |
2a519311 | 669 | |
22fe88d3 | 670 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
2a519311 JB |
671 | (signal < 0 || signal > 100))) |
672 | return NULL; | |
673 | ||
bef9bacc | 674 | if (WARN_ON(len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) |
2a519311 JB |
675 | return NULL; |
676 | ||
bef9bacc MK |
677 | privsz = wiphy->bss_priv_size; |
678 | ||
2a519311 JB |
679 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); |
680 | if (!res) | |
681 | return NULL; | |
682 | ||
683 | memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); | |
684 | res->pub.channel = channel; | |
2a519311 JB |
685 | res->pub.signal = signal; |
686 | res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); | |
687 | res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); | |
688 | res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); | |
34a6eddb JM |
689 | /* |
690 | * The initial buffer for the IEs is allocated with the BSS entry and | |
691 | * is located after the private area. | |
692 | */ | |
693 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { | |
694 | res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; | |
695 | memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, | |
696 | ielen); | |
697 | res->pub.len_proberesp_ies = ielen; | |
698 | res->pub.information_elements = res->pub.proberesp_ies; | |
699 | res->pub.len_information_elements = res->pub.len_proberesp_ies; | |
700 | } else { | |
701 | res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; | |
702 | memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); | |
703 | res->pub.len_beacon_ies = ielen; | |
704 | res->pub.information_elements = res->pub.beacon_ies; | |
705 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
706 | } | |
2a519311 JB |
707 | |
708 | kref_init(&res->ref); | |
709 | ||
34a6eddb | 710 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
2a519311 JB |
711 | if (!res) |
712 | return NULL; | |
713 | ||
e38f8a7a LR |
714 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
715 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
716 | ||
2a519311 JB |
717 | /* cfg80211_bss_update gives us a referenced result */ |
718 | return &res->pub; | |
719 | } | |
720 | EXPORT_SYMBOL(cfg80211_inform_bss_frame); | |
721 | ||
722 | void cfg80211_put_bss(struct cfg80211_bss *pub) | |
723 | { | |
724 | struct cfg80211_internal_bss *bss; | |
725 | ||
726 | if (!pub) | |
727 | return; | |
728 | ||
729 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
730 | kref_put(&bss->ref, bss_release); | |
731 | } | |
732 | EXPORT_SYMBOL(cfg80211_put_bss); | |
733 | ||
d491af19 JB |
734 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
735 | { | |
736 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
737 | struct cfg80211_internal_bss *bss; | |
738 | ||
739 | if (WARN_ON(!pub)) | |
740 | return; | |
741 | ||
742 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
743 | ||
744 | spin_lock_bh(&dev->bss_lock); | |
3207390a | 745 | if (!list_empty(&bss->list)) { |
2b78ac9b | 746 | __cfg80211_unlink_bss(dev, bss); |
3207390a | 747 | dev->bss_generation++; |
3207390a | 748 | } |
d491af19 | 749 | spin_unlock_bh(&dev->bss_lock); |
d491af19 JB |
750 | } |
751 | EXPORT_SYMBOL(cfg80211_unlink_bss); | |
752 | ||
3d23e349 | 753 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
754 | int cfg80211_wext_siwscan(struct net_device *dev, |
755 | struct iw_request_info *info, | |
756 | union iwreq_data *wrqu, char *extra) | |
757 | { | |
758 | struct cfg80211_registered_device *rdev; | |
759 | struct wiphy *wiphy; | |
760 | struct iw_scan_req *wreq = NULL; | |
65486c8b | 761 | struct cfg80211_scan_request *creq = NULL; |
2a519311 JB |
762 | int i, err, n_channels = 0; |
763 | enum ieee80211_band band; | |
764 | ||
765 | if (!netif_running(dev)) | |
766 | return -ENETDOWN; | |
767 | ||
b2e3abdc HS |
768 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
769 | wreq = (struct iw_scan_req *)extra; | |
770 | ||
463d0183 | 771 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
772 | |
773 | if (IS_ERR(rdev)) | |
774 | return PTR_ERR(rdev); | |
775 | ||
776 | if (rdev->scan_req) { | |
777 | err = -EBUSY; | |
778 | goto out; | |
779 | } | |
780 | ||
781 | wiphy = &rdev->wiphy; | |
782 | ||
b2e3abdc HS |
783 | /* Determine number of channels, needed to allocate creq */ |
784 | if (wreq && wreq->num_channels) | |
785 | n_channels = wreq->num_channels; | |
786 | else { | |
787 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
788 | if (wiphy->bands[band]) | |
789 | n_channels += wiphy->bands[band]->n_channels; | |
790 | } | |
2a519311 JB |
791 | |
792 | creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + | |
793 | n_channels * sizeof(void *), | |
794 | GFP_ATOMIC); | |
795 | if (!creq) { | |
796 | err = -ENOMEM; | |
797 | goto out; | |
798 | } | |
799 | ||
800 | creq->wiphy = wiphy; | |
463d0183 | 801 | creq->dev = dev; |
5ba63533 JB |
802 | /* SSIDs come after channels */ |
803 | creq->ssids = (void *)&creq->channels[n_channels]; | |
2a519311 JB |
804 | creq->n_channels = n_channels; |
805 | creq->n_ssids = 1; | |
806 | ||
b2e3abdc | 807 | /* translate "Scan on frequencies" request */ |
2a519311 JB |
808 | i = 0; |
809 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
810 | int j; | |
584991dc | 811 | |
2a519311 JB |
812 | if (!wiphy->bands[band]) |
813 | continue; | |
584991dc | 814 | |
2a519311 | 815 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
584991dc JB |
816 | /* ignore disabled channels */ |
817 | if (wiphy->bands[band]->channels[j].flags & | |
818 | IEEE80211_CHAN_DISABLED) | |
819 | continue; | |
b2e3abdc HS |
820 | |
821 | /* If we have a wireless request structure and the | |
822 | * wireless request specifies frequencies, then search | |
823 | * for the matching hardware channel. | |
824 | */ | |
825 | if (wreq && wreq->num_channels) { | |
826 | int k; | |
827 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; | |
828 | for (k = 0; k < wreq->num_channels; k++) { | |
a4e7b730 | 829 | int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); |
b2e3abdc HS |
830 | if (wext_freq == wiphy_freq) |
831 | goto wext_freq_found; | |
832 | } | |
833 | goto wext_freq_not_found; | |
834 | } | |
835 | ||
836 | wext_freq_found: | |
2a519311 JB |
837 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
838 | i++; | |
b2e3abdc | 839 | wext_freq_not_found: ; |
2a519311 JB |
840 | } |
841 | } | |
8862dc5f HS |
842 | /* No channels found? */ |
843 | if (!i) { | |
844 | err = -EINVAL; | |
845 | goto out; | |
846 | } | |
2a519311 | 847 | |
b2e3abdc HS |
848 | /* Set real number of channels specified in creq->channels[] */ |
849 | creq->n_channels = i; | |
2a519311 | 850 | |
b2e3abdc HS |
851 | /* translate "Scan for SSID" request */ |
852 | if (wreq) { | |
2a519311 | 853 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
65486c8b JB |
854 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
855 | err = -EINVAL; | |
856 | goto out; | |
857 | } | |
2a519311 JB |
858 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
859 | creq->ssids[0].ssid_len = wreq->essid_len; | |
860 | } | |
861 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) | |
862 | creq->n_ssids = 0; | |
863 | } | |
864 | ||
34850ab2 | 865 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) |
a401d2bb JB |
866 | if (wiphy->bands[i]) |
867 | creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1; | |
34850ab2 | 868 | |
2a519311 JB |
869 | rdev->scan_req = creq; |
870 | err = rdev->ops->scan(wiphy, dev, creq); | |
871 | if (err) { | |
872 | rdev->scan_req = NULL; | |
65486c8b | 873 | /* creq will be freed below */ |
463d0183 | 874 | } else { |
a538e2d5 | 875 | nl80211_send_scan_start(rdev, dev); |
65486c8b JB |
876 | /* creq now owned by driver */ |
877 | creq = NULL; | |
463d0183 JB |
878 | dev_hold(dev); |
879 | } | |
2a519311 | 880 | out: |
65486c8b | 881 | kfree(creq); |
4d0c8aea | 882 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
883 | return err; |
884 | } | |
ba44cb72 | 885 | EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); |
2a519311 JB |
886 | |
887 | static void ieee80211_scan_add_ies(struct iw_request_info *info, | |
888 | struct cfg80211_bss *bss, | |
889 | char **current_ev, char *end_buf) | |
890 | { | |
891 | u8 *pos, *end, *next; | |
892 | struct iw_event iwe; | |
893 | ||
894 | if (!bss->information_elements || | |
895 | !bss->len_information_elements) | |
896 | return; | |
897 | ||
898 | /* | |
899 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
900 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
901 | */ | |
902 | pos = bss->information_elements; | |
903 | end = pos + bss->len_information_elements; | |
904 | ||
905 | while (end - pos > IW_GENERIC_IE_MAX) { | |
906 | next = pos + 2 + pos[1]; | |
907 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
908 | next = next + 2 + next[1]; | |
909 | ||
910 | memset(&iwe, 0, sizeof(iwe)); | |
911 | iwe.cmd = IWEVGENIE; | |
912 | iwe.u.data.length = next - pos; | |
913 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
914 | end_buf, &iwe, pos); | |
915 | ||
916 | pos = next; | |
917 | } | |
918 | ||
919 | if (end > pos) { | |
920 | memset(&iwe, 0, sizeof(iwe)); | |
921 | iwe.cmd = IWEVGENIE; | |
922 | iwe.u.data.length = end - pos; | |
923 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
924 | end_buf, &iwe, pos); | |
925 | } | |
926 | } | |
927 | ||
cb3a8eec DW |
928 | static inline unsigned int elapsed_jiffies_msecs(unsigned long start) |
929 | { | |
930 | unsigned long end = jiffies; | |
931 | ||
932 | if (end >= start) | |
933 | return jiffies_to_msecs(end - start); | |
934 | ||
935 | return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); | |
936 | } | |
2a519311 JB |
937 | |
938 | static char * | |
77965c97 JB |
939 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
940 | struct cfg80211_internal_bss *bss, char *current_ev, | |
941 | char *end_buf) | |
2a519311 JB |
942 | { |
943 | struct iw_event iwe; | |
944 | u8 *buf, *cfg, *p; | |
945 | u8 *ie = bss->pub.information_elements; | |
a77b8552 | 946 | int rem = bss->pub.len_information_elements, i, sig; |
2a519311 JB |
947 | bool ismesh = false; |
948 | ||
949 | memset(&iwe, 0, sizeof(iwe)); | |
950 | iwe.cmd = SIOCGIWAP; | |
951 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
952 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); | |
953 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
954 | IW_EV_ADDR_LEN); | |
955 | ||
956 | memset(&iwe, 0, sizeof(iwe)); | |
957 | iwe.cmd = SIOCGIWFREQ; | |
958 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); | |
959 | iwe.u.freq.e = 0; | |
960 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
961 | IW_EV_FREQ_LEN); | |
962 | ||
963 | memset(&iwe, 0, sizeof(iwe)); | |
964 | iwe.cmd = SIOCGIWFREQ; | |
965 | iwe.u.freq.m = bss->pub.channel->center_freq; | |
966 | iwe.u.freq.e = 6; | |
967 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
968 | IW_EV_FREQ_LEN); | |
969 | ||
77965c97 | 970 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
2a519311 JB |
971 | memset(&iwe, 0, sizeof(iwe)); |
972 | iwe.cmd = IWEVQUAL; | |
973 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | | |
974 | IW_QUAL_NOISE_INVALID | | |
a77b8552 | 975 | IW_QUAL_QUAL_UPDATED; |
77965c97 | 976 | switch (wiphy->signal_type) { |
2a519311 | 977 | case CFG80211_SIGNAL_TYPE_MBM: |
a77b8552 JB |
978 | sig = bss->pub.signal / 100; |
979 | iwe.u.qual.level = sig; | |
2a519311 | 980 | iwe.u.qual.updated |= IW_QUAL_DBM; |
a77b8552 JB |
981 | if (sig < -110) /* rather bad */ |
982 | sig = -110; | |
983 | else if (sig > -40) /* perfect */ | |
984 | sig = -40; | |
985 | /* will give a range of 0 .. 70 */ | |
986 | iwe.u.qual.qual = sig + 110; | |
2a519311 JB |
987 | break; |
988 | case CFG80211_SIGNAL_TYPE_UNSPEC: | |
989 | iwe.u.qual.level = bss->pub.signal; | |
a77b8552 JB |
990 | /* will give range 0 .. 100 */ |
991 | iwe.u.qual.qual = bss->pub.signal; | |
2a519311 JB |
992 | break; |
993 | default: | |
994 | /* not reached */ | |
995 | break; | |
996 | } | |
997 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
998 | &iwe, IW_EV_QUAL_LEN); | |
999 | } | |
1000 | ||
1001 | memset(&iwe, 0, sizeof(iwe)); | |
1002 | iwe.cmd = SIOCGIWENCODE; | |
1003 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) | |
1004 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
1005 | else | |
1006 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1007 | iwe.u.data.length = 0; | |
1008 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1009 | &iwe, ""); | |
1010 | ||
1011 | while (rem >= 2) { | |
1012 | /* invalid data */ | |
1013 | if (ie[1] > rem - 2) | |
1014 | break; | |
1015 | ||
1016 | switch (ie[0]) { | |
1017 | case WLAN_EID_SSID: | |
1018 | memset(&iwe, 0, sizeof(iwe)); | |
1019 | iwe.cmd = SIOCGIWESSID; | |
1020 | iwe.u.data.length = ie[1]; | |
1021 | iwe.u.data.flags = 1; | |
1022 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1023 | &iwe, ie + 2); | |
1024 | break; | |
1025 | case WLAN_EID_MESH_ID: | |
1026 | memset(&iwe, 0, sizeof(iwe)); | |
1027 | iwe.cmd = SIOCGIWESSID; | |
1028 | iwe.u.data.length = ie[1]; | |
1029 | iwe.u.data.flags = 1; | |
1030 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1031 | &iwe, ie + 2); | |
1032 | break; | |
1033 | case WLAN_EID_MESH_CONFIG: | |
1034 | ismesh = true; | |
136cfa28 | 1035 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
1036 | break; |
1037 | buf = kmalloc(50, GFP_ATOMIC); | |
1038 | if (!buf) | |
1039 | break; | |
1040 | cfg = ie + 2; | |
1041 | memset(&iwe, 0, sizeof(iwe)); | |
1042 | iwe.cmd = IWEVCUSTOM; | |
76aa5e70 RP |
1043 | sprintf(buf, "Mesh Network Path Selection Protocol ID: " |
1044 | "0x%02X", cfg[0]); | |
2a519311 JB |
1045 | iwe.u.data.length = strlen(buf); |
1046 | current_ev = iwe_stream_add_point(info, current_ev, | |
1047 | end_buf, | |
1048 | &iwe, buf); | |
76aa5e70 RP |
1049 | sprintf(buf, "Path Selection Metric ID: 0x%02X", |
1050 | cfg[1]); | |
2a519311 JB |
1051 | iwe.u.data.length = strlen(buf); |
1052 | current_ev = iwe_stream_add_point(info, current_ev, | |
1053 | end_buf, | |
1054 | &iwe, buf); | |
76aa5e70 RP |
1055 | sprintf(buf, "Congestion Control Mode ID: 0x%02X", |
1056 | cfg[2]); | |
2a519311 JB |
1057 | iwe.u.data.length = strlen(buf); |
1058 | current_ev = iwe_stream_add_point(info, current_ev, | |
1059 | end_buf, | |
1060 | &iwe, buf); | |
76aa5e70 | 1061 | sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); |
2a519311 JB |
1062 | iwe.u.data.length = strlen(buf); |
1063 | current_ev = iwe_stream_add_point(info, current_ev, | |
1064 | end_buf, | |
1065 | &iwe, buf); | |
76aa5e70 RP |
1066 | sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); |
1067 | iwe.u.data.length = strlen(buf); | |
1068 | current_ev = iwe_stream_add_point(info, current_ev, | |
1069 | end_buf, | |
1070 | &iwe, buf); | |
1071 | sprintf(buf, "Formation Info: 0x%02X", cfg[5]); | |
1072 | iwe.u.data.length = strlen(buf); | |
1073 | current_ev = iwe_stream_add_point(info, current_ev, | |
1074 | end_buf, | |
1075 | &iwe, buf); | |
1076 | sprintf(buf, "Capabilities: 0x%02X", cfg[6]); | |
2a519311 JB |
1077 | iwe.u.data.length = strlen(buf); |
1078 | current_ev = iwe_stream_add_point(info, current_ev, | |
1079 | end_buf, | |
1080 | &iwe, buf); | |
1081 | kfree(buf); | |
1082 | break; | |
1083 | case WLAN_EID_SUPP_RATES: | |
1084 | case WLAN_EID_EXT_SUPP_RATES: | |
1085 | /* display all supported rates in readable format */ | |
1086 | p = current_ev + iwe_stream_lcp_len(info); | |
1087 | ||
1088 | memset(&iwe, 0, sizeof(iwe)); | |
1089 | iwe.cmd = SIOCGIWRATE; | |
1090 | /* Those two flags are ignored... */ | |
1091 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
1092 | ||
1093 | for (i = 0; i < ie[1]; i++) { | |
1094 | iwe.u.bitrate.value = | |
1095 | ((ie[i + 2] & 0x7f) * 500000); | |
1096 | p = iwe_stream_add_value(info, current_ev, p, | |
1097 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
1098 | } | |
1099 | current_ev = p; | |
1100 | break; | |
1101 | } | |
1102 | rem -= ie[1] + 2; | |
1103 | ie += ie[1] + 2; | |
1104 | } | |
1105 | ||
f64f9e71 JP |
1106 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
1107 | ismesh) { | |
2a519311 JB |
1108 | memset(&iwe, 0, sizeof(iwe)); |
1109 | iwe.cmd = SIOCGIWMODE; | |
1110 | if (ismesh) | |
1111 | iwe.u.mode = IW_MODE_MESH; | |
1112 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) | |
1113 | iwe.u.mode = IW_MODE_MASTER; | |
1114 | else | |
1115 | iwe.u.mode = IW_MODE_ADHOC; | |
1116 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
1117 | &iwe, IW_EV_UINT_LEN); | |
1118 | } | |
1119 | ||
1120 | buf = kmalloc(30, GFP_ATOMIC); | |
1121 | if (buf) { | |
1122 | memset(&iwe, 0, sizeof(iwe)); | |
1123 | iwe.cmd = IWEVCUSTOM; | |
1124 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); | |
1125 | iwe.u.data.length = strlen(buf); | |
1126 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1127 | &iwe, buf); | |
1128 | memset(&iwe, 0, sizeof(iwe)); | |
1129 | iwe.cmd = IWEVCUSTOM; | |
cb3a8eec DW |
1130 | sprintf(buf, " Last beacon: %ums ago", |
1131 | elapsed_jiffies_msecs(bss->ts)); | |
2a519311 JB |
1132 | iwe.u.data.length = strlen(buf); |
1133 | current_ev = iwe_stream_add_point(info, current_ev, | |
1134 | end_buf, &iwe, buf); | |
1135 | kfree(buf); | |
1136 | } | |
1137 | ||
1138 | ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); | |
1139 | ||
1140 | return current_ev; | |
1141 | } | |
1142 | ||
1143 | ||
1144 | static int ieee80211_scan_results(struct cfg80211_registered_device *dev, | |
1145 | struct iw_request_info *info, | |
1146 | char *buf, size_t len) | |
1147 | { | |
1148 | char *current_ev = buf; | |
1149 | char *end_buf = buf + len; | |
1150 | struct cfg80211_internal_bss *bss; | |
1151 | ||
1152 | spin_lock_bh(&dev->bss_lock); | |
1153 | cfg80211_bss_expire(dev); | |
1154 | ||
1155 | list_for_each_entry(bss, &dev->bss_list, list) { | |
1156 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
1157 | spin_unlock_bh(&dev->bss_lock); | |
1158 | return -E2BIG; | |
1159 | } | |
77965c97 JB |
1160 | current_ev = ieee80211_bss(&dev->wiphy, info, bss, |
1161 | current_ev, end_buf); | |
2a519311 JB |
1162 | } |
1163 | spin_unlock_bh(&dev->bss_lock); | |
1164 | return current_ev - buf; | |
1165 | } | |
1166 | ||
1167 | ||
1168 | int cfg80211_wext_giwscan(struct net_device *dev, | |
1169 | struct iw_request_info *info, | |
1170 | struct iw_point *data, char *extra) | |
1171 | { | |
1172 | struct cfg80211_registered_device *rdev; | |
1173 | int res; | |
1174 | ||
1175 | if (!netif_running(dev)) | |
1176 | return -ENETDOWN; | |
1177 | ||
463d0183 | 1178 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
1179 | |
1180 | if (IS_ERR(rdev)) | |
1181 | return PTR_ERR(rdev); | |
1182 | ||
1183 | if (rdev->scan_req) { | |
1184 | res = -EAGAIN; | |
1185 | goto out; | |
1186 | } | |
1187 | ||
1188 | res = ieee80211_scan_results(rdev, info, extra, data->length); | |
1189 | data->length = 0; | |
1190 | if (res >= 0) { | |
1191 | data->length = res; | |
1192 | res = 0; | |
1193 | } | |
1194 | ||
1195 | out: | |
4d0c8aea | 1196 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
1197 | return res; |
1198 | } | |
ba44cb72 | 1199 | EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); |
2a519311 | 1200 | #endif |