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 | ||
103 | cfg80211_lock_rdev(rdev); | |
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 | ||
110 | cfg80211_unlock_rdev(rdev); | |
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 | ||
122 | void __cfg80211_sched_scan_stopped(struct work_struct *wk) | |
123 | { | |
124 | struct cfg80211_registered_device *rdev; | |
125 | ||
126 | rdev = container_of(wk, struct cfg80211_registered_device, | |
127 | sched_scan_stopped_wk); | |
128 | ||
129 | cfg80211_lock_rdev(rdev); | |
130 | __cfg80211_stop_sched_scan(rdev, true); | |
131 | cfg80211_unlock_rdev(rdev); | |
132 | } | |
133 | ||
134 | void cfg80211_sched_scan_stopped(struct wiphy *wiphy) | |
135 | { | |
136 | queue_work(cfg80211_wq, &wiphy_to_dev(wiphy)->sched_scan_stopped_wk); | |
137 | } | |
138 | EXPORT_SYMBOL(cfg80211_sched_scan_stopped); | |
139 | ||
140 | int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, | |
141 | bool driver_initiated) | |
142 | { | |
143 | int err; | |
144 | struct net_device *dev; | |
145 | ||
146 | ASSERT_RDEV_LOCK(rdev); | |
147 | ||
148 | if (!rdev->sched_scan_req) | |
149 | return 0; | |
150 | ||
151 | dev = rdev->sched_scan_req->dev; | |
152 | ||
153 | err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev, | |
154 | driver_initiated); | |
155 | if (err) | |
156 | return err; | |
157 | ||
158 | nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED); | |
159 | ||
160 | kfree(rdev->sched_scan_req); | |
161 | rdev->sched_scan_req = NULL; | |
162 | ||
163 | return err; | |
164 | } | |
165 | ||
2a519311 JB |
166 | static void bss_release(struct kref *ref) |
167 | { | |
168 | struct cfg80211_internal_bss *bss; | |
169 | ||
170 | bss = container_of(ref, struct cfg80211_internal_bss, ref); | |
78c1c7e1 JB |
171 | if (bss->pub.free_priv) |
172 | bss->pub.free_priv(&bss->pub); | |
cd1658f5 | 173 | |
34a6eddb JM |
174 | if (bss->beacon_ies_allocated) |
175 | kfree(bss->pub.beacon_ies); | |
176 | if (bss->proberesp_ies_allocated) | |
177 | kfree(bss->pub.proberesp_ies); | |
cd1658f5 | 178 | |
19957bb3 JB |
179 | BUG_ON(atomic_read(&bss->hold)); |
180 | ||
2a519311 JB |
181 | kfree(bss); |
182 | } | |
183 | ||
cb3a8eec DW |
184 | /* must hold dev->bss_lock! */ |
185 | void cfg80211_bss_age(struct cfg80211_registered_device *dev, | |
186 | unsigned long age_secs) | |
187 | { | |
188 | struct cfg80211_internal_bss *bss; | |
189 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
190 | ||
191 | list_for_each_entry(bss, &dev->bss_list, list) { | |
192 | bss->ts -= age_jiffies; | |
193 | } | |
194 | } | |
195 | ||
2b78ac9b JO |
196 | /* must hold dev->bss_lock! */ |
197 | static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev, | |
198 | struct cfg80211_internal_bss *bss) | |
199 | { | |
200 | list_del_init(&bss->list); | |
201 | rb_erase(&bss->rbn, &dev->bss_tree); | |
202 | kref_put(&bss->ref, bss_release); | |
203 | } | |
204 | ||
2a519311 JB |
205 | /* must hold dev->bss_lock! */ |
206 | void cfg80211_bss_expire(struct cfg80211_registered_device *dev) | |
207 | { | |
208 | struct cfg80211_internal_bss *bss, *tmp; | |
209 | bool expired = false; | |
210 | ||
211 | list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { | |
19957bb3 JB |
212 | if (atomic_read(&bss->hold)) |
213 | continue; | |
214 | if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2a519311 | 215 | continue; |
2b78ac9b | 216 | __cfg80211_unlink_bss(dev, bss); |
2a519311 JB |
217 | expired = true; |
218 | } | |
219 | ||
220 | if (expired) | |
221 | dev->bss_generation++; | |
222 | } | |
223 | ||
c21dbf92 | 224 | const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) |
2a519311 | 225 | { |
c21dbf92 | 226 | while (len > 2 && ies[0] != eid) { |
2a519311 JB |
227 | len -= ies[1] + 2; |
228 | ies += ies[1] + 2; | |
229 | } | |
230 | if (len < 2) | |
231 | return NULL; | |
232 | if (len < 2 + ies[1]) | |
233 | return NULL; | |
234 | return ies; | |
235 | } | |
c21dbf92 | 236 | EXPORT_SYMBOL(cfg80211_find_ie); |
2a519311 JB |
237 | |
238 | static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) | |
239 | { | |
c21dbf92 JB |
240 | const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); |
241 | const u8 *ie2 = cfg80211_find_ie(num, ies2, len2); | |
2a519311 JB |
242 | int r; |
243 | ||
244 | if (!ie1 && !ie2) | |
245 | return 0; | |
cd3468ba | 246 | if (!ie1 || !ie2) |
2a519311 JB |
247 | return -1; |
248 | ||
249 | r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1])); | |
250 | if (r == 0 && ie1[1] != ie2[1]) | |
251 | return ie2[1] - ie1[1]; | |
252 | return r; | |
253 | } | |
254 | ||
255 | static bool is_bss(struct cfg80211_bss *a, | |
256 | const u8 *bssid, | |
257 | const u8 *ssid, size_t ssid_len) | |
258 | { | |
259 | const u8 *ssidie; | |
260 | ||
79420f09 | 261 | if (bssid && compare_ether_addr(a->bssid, bssid)) |
2a519311 JB |
262 | return false; |
263 | ||
79420f09 JB |
264 | if (!ssid) |
265 | return true; | |
266 | ||
c21dbf92 JB |
267 | ssidie = cfg80211_find_ie(WLAN_EID_SSID, |
268 | a->information_elements, | |
269 | a->len_information_elements); | |
2a519311 JB |
270 | if (!ssidie) |
271 | return false; | |
272 | if (ssidie[1] != ssid_len) | |
273 | return false; | |
274 | return memcmp(ssidie + 2, ssid, ssid_len) == 0; | |
275 | } | |
276 | ||
277 | static bool is_mesh(struct cfg80211_bss *a, | |
278 | const u8 *meshid, size_t meshidlen, | |
279 | const u8 *meshcfg) | |
280 | { | |
281 | const u8 *ie; | |
282 | ||
0a35d36d | 283 | if (!WLAN_CAPABILITY_IS_MBSS(a->capability)) |
2a519311 JB |
284 | return false; |
285 | ||
c21dbf92 JB |
286 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, |
287 | a->information_elements, | |
288 | a->len_information_elements); | |
2a519311 JB |
289 | if (!ie) |
290 | return false; | |
291 | if (ie[1] != meshidlen) | |
292 | return false; | |
293 | if (memcmp(ie + 2, meshid, meshidlen)) | |
294 | return false; | |
295 | ||
c21dbf92 JB |
296 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, |
297 | a->information_elements, | |
298 | a->len_information_elements); | |
cd3468ba JB |
299 | if (!ie) |
300 | return false; | |
136cfa28 | 301 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
302 | return false; |
303 | ||
304 | /* | |
305 | * Ignore mesh capability (last two bytes of the IE) when | |
306 | * comparing since that may differ between stations taking | |
307 | * part in the same mesh. | |
308 | */ | |
136cfa28 RP |
309 | return memcmp(ie + 2, meshcfg, |
310 | sizeof(struct ieee80211_meshconf_ie) - 2) == 0; | |
2a519311 JB |
311 | } |
312 | ||
313 | static int cmp_bss(struct cfg80211_bss *a, | |
314 | struct cfg80211_bss *b) | |
315 | { | |
316 | int r; | |
317 | ||
318 | if (a->channel != b->channel) | |
319 | return b->channel->center_freq - a->channel->center_freq; | |
320 | ||
0a35d36d | 321 | if (WLAN_CAPABILITY_IS_MBSS(a->capability | b->capability)) { |
2a519311 JB |
322 | r = cmp_ies(WLAN_EID_MESH_ID, |
323 | a->information_elements, | |
324 | a->len_information_elements, | |
325 | b->information_elements, | |
326 | b->len_information_elements); | |
327 | if (r) | |
328 | return r; | |
329 | return cmp_ies(WLAN_EID_MESH_CONFIG, | |
330 | a->information_elements, | |
331 | a->len_information_elements, | |
332 | b->information_elements, | |
333 | b->len_information_elements); | |
334 | } | |
335 | ||
0a35d36d JC |
336 | r = memcmp(a->bssid, b->bssid, ETH_ALEN); |
337 | if (r) | |
338 | return r; | |
339 | ||
2a519311 JB |
340 | return cmp_ies(WLAN_EID_SSID, |
341 | a->information_elements, | |
342 | a->len_information_elements, | |
343 | b->information_elements, | |
344 | b->len_information_elements); | |
345 | } | |
346 | ||
347 | struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, | |
348 | struct ieee80211_channel *channel, | |
349 | const u8 *bssid, | |
79420f09 JB |
350 | const u8 *ssid, size_t ssid_len, |
351 | u16 capa_mask, u16 capa_val) | |
2a519311 JB |
352 | { |
353 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
354 | struct cfg80211_internal_bss *bss, *res = NULL; | |
ccb6c136 | 355 | unsigned long now = jiffies; |
2a519311 JB |
356 | |
357 | spin_lock_bh(&dev->bss_lock); | |
358 | ||
359 | list_for_each_entry(bss, &dev->bss_list, list) { | |
79420f09 JB |
360 | if ((bss->pub.capability & capa_mask) != capa_val) |
361 | continue; | |
2a519311 JB |
362 | if (channel && bss->pub.channel != channel) |
363 | continue; | |
ccb6c136 JB |
364 | /* Don't get expired BSS structs */ |
365 | if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && | |
366 | !atomic_read(&bss->hold)) | |
367 | continue; | |
2a519311 JB |
368 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
369 | res = bss; | |
370 | kref_get(&res->ref); | |
371 | break; | |
372 | } | |
373 | } | |
374 | ||
375 | spin_unlock_bh(&dev->bss_lock); | |
376 | if (!res) | |
377 | return NULL; | |
378 | return &res->pub; | |
379 | } | |
380 | EXPORT_SYMBOL(cfg80211_get_bss); | |
381 | ||
382 | struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, | |
383 | struct ieee80211_channel *channel, | |
384 | const u8 *meshid, size_t meshidlen, | |
385 | const u8 *meshcfg) | |
386 | { | |
387 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
388 | struct cfg80211_internal_bss *bss, *res = NULL; | |
389 | ||
390 | spin_lock_bh(&dev->bss_lock); | |
391 | ||
392 | list_for_each_entry(bss, &dev->bss_list, list) { | |
393 | if (channel && bss->pub.channel != channel) | |
394 | continue; | |
395 | if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { | |
396 | res = bss; | |
397 | kref_get(&res->ref); | |
398 | break; | |
399 | } | |
400 | } | |
401 | ||
402 | spin_unlock_bh(&dev->bss_lock); | |
403 | if (!res) | |
404 | return NULL; | |
405 | return &res->pub; | |
406 | } | |
407 | EXPORT_SYMBOL(cfg80211_get_mesh); | |
408 | ||
409 | ||
410 | static void rb_insert_bss(struct cfg80211_registered_device *dev, | |
411 | struct cfg80211_internal_bss *bss) | |
412 | { | |
413 | struct rb_node **p = &dev->bss_tree.rb_node; | |
414 | struct rb_node *parent = NULL; | |
415 | struct cfg80211_internal_bss *tbss; | |
416 | int cmp; | |
417 | ||
418 | while (*p) { | |
419 | parent = *p; | |
420 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); | |
421 | ||
422 | cmp = cmp_bss(&bss->pub, &tbss->pub); | |
423 | ||
424 | if (WARN_ON(!cmp)) { | |
425 | /* will sort of leak this BSS */ | |
426 | return; | |
427 | } | |
428 | ||
429 | if (cmp < 0) | |
430 | p = &(*p)->rb_left; | |
431 | else | |
432 | p = &(*p)->rb_right; | |
433 | } | |
434 | ||
435 | rb_link_node(&bss->rbn, parent, p); | |
436 | rb_insert_color(&bss->rbn, &dev->bss_tree); | |
437 | } | |
438 | ||
439 | static struct cfg80211_internal_bss * | |
440 | rb_find_bss(struct cfg80211_registered_device *dev, | |
441 | struct cfg80211_internal_bss *res) | |
442 | { | |
443 | struct rb_node *n = dev->bss_tree.rb_node; | |
444 | struct cfg80211_internal_bss *bss; | |
445 | int r; | |
446 | ||
447 | while (n) { | |
448 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); | |
449 | r = cmp_bss(&res->pub, &bss->pub); | |
450 | ||
451 | if (r == 0) | |
452 | return bss; | |
453 | else if (r < 0) | |
454 | n = n->rb_left; | |
455 | else | |
456 | n = n->rb_right; | |
457 | } | |
458 | ||
459 | return NULL; | |
460 | } | |
461 | ||
462 | static struct cfg80211_internal_bss * | |
463 | cfg80211_bss_update(struct cfg80211_registered_device *dev, | |
34a6eddb | 464 | struct cfg80211_internal_bss *res) |
2a519311 JB |
465 | { |
466 | struct cfg80211_internal_bss *found = NULL; | |
467 | const u8 *meshid, *meshcfg; | |
468 | ||
469 | /* | |
470 | * The reference to "res" is donated to this function. | |
471 | */ | |
472 | ||
473 | if (WARN_ON(!res->pub.channel)) { | |
474 | kref_put(&res->ref, bss_release); | |
475 | return NULL; | |
476 | } | |
477 | ||
478 | res->ts = jiffies; | |
479 | ||
0a35d36d | 480 | if (WLAN_CAPABILITY_IS_MBSS(res->pub.capability)) { |
2a519311 | 481 | /* must be mesh, verify */ |
c21dbf92 JB |
482 | meshid = cfg80211_find_ie(WLAN_EID_MESH_ID, |
483 | res->pub.information_elements, | |
484 | res->pub.len_information_elements); | |
485 | meshcfg = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
486 | res->pub.information_elements, | |
487 | res->pub.len_information_elements); | |
2a519311 | 488 | if (!meshid || !meshcfg || |
136cfa28 | 489 | meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) { |
2a519311 JB |
490 | /* bogus mesh */ |
491 | kref_put(&res->ref, bss_release); | |
492 | return NULL; | |
493 | } | |
494 | } | |
495 | ||
496 | spin_lock_bh(&dev->bss_lock); | |
497 | ||
498 | found = rb_find_bss(dev, res); | |
499 | ||
cd1658f5 | 500 | if (found) { |
2a519311 JB |
501 | found->pub.beacon_interval = res->pub.beacon_interval; |
502 | found->pub.tsf = res->pub.tsf; | |
503 | found->pub.signal = res->pub.signal; | |
2a519311 JB |
504 | found->pub.capability = res->pub.capability; |
505 | found->ts = res->ts; | |
cd1658f5 | 506 | |
34a6eddb JM |
507 | /* Update IEs */ |
508 | if (res->pub.proberesp_ies) { | |
cd1658f5 | 509 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
34a6eddb JM |
510 | size_t ielen = res->pub.len_proberesp_ies; |
511 | ||
512 | if (found->pub.proberesp_ies && | |
513 | !found->proberesp_ies_allocated && | |
514 | ksize(found) >= used + ielen) { | |
515 | memcpy(found->pub.proberesp_ies, | |
516 | res->pub.proberesp_ies, ielen); | |
517 | found->pub.len_proberesp_ies = ielen; | |
518 | } else { | |
519 | u8 *ies = found->pub.proberesp_ies; | |
520 | ||
521 | if (found->proberesp_ies_allocated) | |
522 | ies = krealloc(ies, ielen, GFP_ATOMIC); | |
523 | else | |
524 | ies = kmalloc(ielen, GFP_ATOMIC); | |
525 | ||
526 | if (ies) { | |
527 | memcpy(ies, res->pub.proberesp_ies, | |
528 | ielen); | |
529 | found->proberesp_ies_allocated = true; | |
530 | found->pub.proberesp_ies = ies; | |
531 | found->pub.len_proberesp_ies = ielen; | |
532 | } | |
533 | } | |
cd1658f5 | 534 | |
34a6eddb JM |
535 | /* Override possible earlier Beacon frame IEs */ |
536 | found->pub.information_elements = | |
537 | found->pub.proberesp_ies; | |
538 | found->pub.len_information_elements = | |
539 | found->pub.len_proberesp_ies; | |
540 | } | |
541 | if (res->pub.beacon_ies) { | |
542 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); | |
543 | size_t ielen = res->pub.len_beacon_ies; | |
01123e23 SN |
544 | bool information_elements_is_beacon_ies = |
545 | (found->pub.information_elements == | |
546 | found->pub.beacon_ies); | |
34a6eddb JM |
547 | |
548 | if (found->pub.beacon_ies && | |
549 | !found->beacon_ies_allocated && | |
550 | ksize(found) >= used + ielen) { | |
551 | memcpy(found->pub.beacon_ies, | |
552 | res->pub.beacon_ies, ielen); | |
553 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 | 554 | } else { |
34a6eddb | 555 | u8 *ies = found->pub.beacon_ies; |
cd1658f5 | 556 | |
34a6eddb | 557 | if (found->beacon_ies_allocated) |
273de92c MB |
558 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
559 | else | |
cd1658f5 JB |
560 | ies = kmalloc(ielen, GFP_ATOMIC); |
561 | ||
562 | if (ies) { | |
34a6eddb JM |
563 | memcpy(ies, res->pub.beacon_ies, |
564 | ielen); | |
565 | found->beacon_ies_allocated = true; | |
566 | found->pub.beacon_ies = ies; | |
567 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 JB |
568 | } |
569 | } | |
01123e23 SN |
570 | |
571 | /* Override IEs if they were from a beacon before */ | |
572 | if (information_elements_is_beacon_ies) { | |
573 | found->pub.information_elements = | |
574 | found->pub.beacon_ies; | |
575 | found->pub.len_information_elements = | |
576 | found->pub.len_beacon_ies; | |
577 | } | |
cd1658f5 JB |
578 | } |
579 | ||
2a519311 JB |
580 | kref_put(&res->ref, bss_release); |
581 | } else { | |
582 | /* this "consumes" the reference */ | |
583 | list_add_tail(&res->list, &dev->bss_list); | |
584 | rb_insert_bss(dev, res); | |
585 | found = res; | |
586 | } | |
587 | ||
588 | dev->bss_generation++; | |
589 | spin_unlock_bh(&dev->bss_lock); | |
590 | ||
591 | kref_get(&found->ref); | |
592 | return found; | |
593 | } | |
594 | ||
06aa7afa JK |
595 | struct cfg80211_bss* |
596 | cfg80211_inform_bss(struct wiphy *wiphy, | |
597 | struct ieee80211_channel *channel, | |
598 | const u8 *bssid, | |
599 | u64 timestamp, u16 capability, u16 beacon_interval, | |
600 | const u8 *ie, size_t ielen, | |
601 | s32 signal, gfp_t gfp) | |
602 | { | |
603 | struct cfg80211_internal_bss *res; | |
604 | size_t privsz; | |
605 | ||
606 | if (WARN_ON(!wiphy)) | |
607 | return NULL; | |
608 | ||
609 | privsz = wiphy->bss_priv_size; | |
610 | ||
22fe88d3 | 611 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
06aa7afa JK |
612 | (signal < 0 || signal > 100))) |
613 | return NULL; | |
614 | ||
615 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); | |
616 | if (!res) | |
617 | return NULL; | |
618 | ||
619 | memcpy(res->pub.bssid, bssid, ETH_ALEN); | |
620 | res->pub.channel = channel; | |
621 | res->pub.signal = signal; | |
622 | res->pub.tsf = timestamp; | |
623 | res->pub.beacon_interval = beacon_interval; | |
624 | res->pub.capability = capability; | |
34a6eddb JM |
625 | /* |
626 | * Since we do not know here whether the IEs are from a Beacon or Probe | |
627 | * Response frame, we need to pick one of the options and only use it | |
628 | * with the driver that does not provide the full Beacon/Probe Response | |
629 | * frame. Use Beacon frame pointer to avoid indicating that this should | |
630 | * override the information_elements pointer should we have received an | |
631 | * earlier indication of Probe Response data. | |
632 | * | |
633 | * The initial buffer for the IEs is allocated with the BSS entry and | |
634 | * is located after the private area. | |
635 | */ | |
636 | res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; | |
637 | memcpy(res->pub.beacon_ies, ie, ielen); | |
638 | res->pub.len_beacon_ies = ielen; | |
639 | res->pub.information_elements = res->pub.beacon_ies; | |
640 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
06aa7afa JK |
641 | |
642 | kref_init(&res->ref); | |
643 | ||
34a6eddb | 644 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
06aa7afa JK |
645 | if (!res) |
646 | return NULL; | |
647 | ||
648 | if (res->pub.capability & WLAN_CAPABILITY_ESS) | |
649 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
650 | ||
651 | /* cfg80211_bss_update gives us a referenced result */ | |
652 | return &res->pub; | |
653 | } | |
654 | EXPORT_SYMBOL(cfg80211_inform_bss); | |
655 | ||
2a519311 JB |
656 | struct cfg80211_bss * |
657 | cfg80211_inform_bss_frame(struct wiphy *wiphy, | |
658 | struct ieee80211_channel *channel, | |
659 | struct ieee80211_mgmt *mgmt, size_t len, | |
77965c97 | 660 | s32 signal, gfp_t gfp) |
2a519311 JB |
661 | { |
662 | struct cfg80211_internal_bss *res; | |
663 | size_t ielen = len - offsetof(struct ieee80211_mgmt, | |
664 | u.probe_resp.variable); | |
bef9bacc MK |
665 | size_t privsz; |
666 | ||
667 | if (WARN_ON(!mgmt)) | |
668 | return NULL; | |
669 | ||
670 | if (WARN_ON(!wiphy)) | |
671 | return NULL; | |
2a519311 | 672 | |
22fe88d3 | 673 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
2a519311 JB |
674 | (signal < 0 || signal > 100))) |
675 | return NULL; | |
676 | ||
bef9bacc | 677 | if (WARN_ON(len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) |
2a519311 JB |
678 | return NULL; |
679 | ||
bef9bacc MK |
680 | privsz = wiphy->bss_priv_size; |
681 | ||
2a519311 JB |
682 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); |
683 | if (!res) | |
684 | return NULL; | |
685 | ||
686 | memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); | |
687 | res->pub.channel = channel; | |
2a519311 JB |
688 | res->pub.signal = signal; |
689 | res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); | |
690 | res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); | |
691 | res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); | |
34a6eddb JM |
692 | /* |
693 | * The initial buffer for the IEs is allocated with the BSS entry and | |
694 | * is located after the private area. | |
695 | */ | |
696 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { | |
697 | res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; | |
698 | memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, | |
699 | ielen); | |
700 | res->pub.len_proberesp_ies = ielen; | |
701 | res->pub.information_elements = res->pub.proberesp_ies; | |
702 | res->pub.len_information_elements = res->pub.len_proberesp_ies; | |
703 | } else { | |
704 | res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; | |
705 | memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); | |
706 | res->pub.len_beacon_ies = ielen; | |
707 | res->pub.information_elements = res->pub.beacon_ies; | |
708 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
709 | } | |
2a519311 JB |
710 | |
711 | kref_init(&res->ref); | |
712 | ||
34a6eddb | 713 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
2a519311 JB |
714 | if (!res) |
715 | return NULL; | |
716 | ||
e38f8a7a LR |
717 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
718 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
719 | ||
2a519311 JB |
720 | /* cfg80211_bss_update gives us a referenced result */ |
721 | return &res->pub; | |
722 | } | |
723 | EXPORT_SYMBOL(cfg80211_inform_bss_frame); | |
724 | ||
725 | void cfg80211_put_bss(struct cfg80211_bss *pub) | |
726 | { | |
727 | struct cfg80211_internal_bss *bss; | |
728 | ||
729 | if (!pub) | |
730 | return; | |
731 | ||
732 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
733 | kref_put(&bss->ref, bss_release); | |
734 | } | |
735 | EXPORT_SYMBOL(cfg80211_put_bss); | |
736 | ||
d491af19 JB |
737 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
738 | { | |
739 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
740 | struct cfg80211_internal_bss *bss; | |
741 | ||
742 | if (WARN_ON(!pub)) | |
743 | return; | |
744 | ||
745 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
746 | ||
747 | spin_lock_bh(&dev->bss_lock); | |
3207390a | 748 | if (!list_empty(&bss->list)) { |
2b78ac9b | 749 | __cfg80211_unlink_bss(dev, bss); |
3207390a | 750 | dev->bss_generation++; |
3207390a | 751 | } |
d491af19 | 752 | spin_unlock_bh(&dev->bss_lock); |
d491af19 JB |
753 | } |
754 | EXPORT_SYMBOL(cfg80211_unlink_bss); | |
755 | ||
3d23e349 | 756 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
757 | int cfg80211_wext_siwscan(struct net_device *dev, |
758 | struct iw_request_info *info, | |
759 | union iwreq_data *wrqu, char *extra) | |
760 | { | |
761 | struct cfg80211_registered_device *rdev; | |
762 | struct wiphy *wiphy; | |
763 | struct iw_scan_req *wreq = NULL; | |
65486c8b | 764 | struct cfg80211_scan_request *creq = NULL; |
2a519311 JB |
765 | int i, err, n_channels = 0; |
766 | enum ieee80211_band band; | |
767 | ||
768 | if (!netif_running(dev)) | |
769 | return -ENETDOWN; | |
770 | ||
b2e3abdc HS |
771 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
772 | wreq = (struct iw_scan_req *)extra; | |
773 | ||
463d0183 | 774 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
775 | |
776 | if (IS_ERR(rdev)) | |
777 | return PTR_ERR(rdev); | |
778 | ||
779 | if (rdev->scan_req) { | |
780 | err = -EBUSY; | |
781 | goto out; | |
782 | } | |
783 | ||
784 | wiphy = &rdev->wiphy; | |
785 | ||
b2e3abdc HS |
786 | /* Determine number of channels, needed to allocate creq */ |
787 | if (wreq && wreq->num_channels) | |
788 | n_channels = wreq->num_channels; | |
789 | else { | |
790 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
791 | if (wiphy->bands[band]) | |
792 | n_channels += wiphy->bands[band]->n_channels; | |
793 | } | |
2a519311 JB |
794 | |
795 | creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + | |
796 | n_channels * sizeof(void *), | |
797 | GFP_ATOMIC); | |
798 | if (!creq) { | |
799 | err = -ENOMEM; | |
800 | goto out; | |
801 | } | |
802 | ||
803 | creq->wiphy = wiphy; | |
463d0183 | 804 | creq->dev = dev; |
5ba63533 JB |
805 | /* SSIDs come after channels */ |
806 | creq->ssids = (void *)&creq->channels[n_channels]; | |
2a519311 JB |
807 | creq->n_channels = n_channels; |
808 | creq->n_ssids = 1; | |
809 | ||
b2e3abdc | 810 | /* translate "Scan on frequencies" request */ |
2a519311 JB |
811 | i = 0; |
812 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
813 | int j; | |
584991dc | 814 | |
2a519311 JB |
815 | if (!wiphy->bands[band]) |
816 | continue; | |
584991dc | 817 | |
2a519311 | 818 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
584991dc JB |
819 | /* ignore disabled channels */ |
820 | if (wiphy->bands[band]->channels[j].flags & | |
821 | IEEE80211_CHAN_DISABLED) | |
822 | continue; | |
b2e3abdc HS |
823 | |
824 | /* If we have a wireless request structure and the | |
825 | * wireless request specifies frequencies, then search | |
826 | * for the matching hardware channel. | |
827 | */ | |
828 | if (wreq && wreq->num_channels) { | |
829 | int k; | |
830 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; | |
831 | for (k = 0; k < wreq->num_channels; k++) { | |
a4e7b730 | 832 | int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); |
b2e3abdc HS |
833 | if (wext_freq == wiphy_freq) |
834 | goto wext_freq_found; | |
835 | } | |
836 | goto wext_freq_not_found; | |
837 | } | |
838 | ||
839 | wext_freq_found: | |
2a519311 JB |
840 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
841 | i++; | |
b2e3abdc | 842 | wext_freq_not_found: ; |
2a519311 JB |
843 | } |
844 | } | |
8862dc5f HS |
845 | /* No channels found? */ |
846 | if (!i) { | |
847 | err = -EINVAL; | |
848 | goto out; | |
849 | } | |
2a519311 | 850 | |
b2e3abdc HS |
851 | /* Set real number of channels specified in creq->channels[] */ |
852 | creq->n_channels = i; | |
2a519311 | 853 | |
b2e3abdc HS |
854 | /* translate "Scan for SSID" request */ |
855 | if (wreq) { | |
2a519311 | 856 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
65486c8b JB |
857 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
858 | err = -EINVAL; | |
859 | goto out; | |
860 | } | |
2a519311 JB |
861 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
862 | creq->ssids[0].ssid_len = wreq->essid_len; | |
863 | } | |
864 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) | |
865 | creq->n_ssids = 0; | |
866 | } | |
867 | ||
868 | rdev->scan_req = creq; | |
869 | err = rdev->ops->scan(wiphy, dev, creq); | |
870 | if (err) { | |
871 | rdev->scan_req = NULL; | |
65486c8b | 872 | /* creq will be freed below */ |
463d0183 | 873 | } else { |
a538e2d5 | 874 | nl80211_send_scan_start(rdev, dev); |
65486c8b JB |
875 | /* creq now owned by driver */ |
876 | creq = NULL; | |
463d0183 JB |
877 | dev_hold(dev); |
878 | } | |
2a519311 | 879 | out: |
65486c8b | 880 | kfree(creq); |
4d0c8aea | 881 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
882 | return err; |
883 | } | |
ba44cb72 | 884 | EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); |
2a519311 JB |
885 | |
886 | static void ieee80211_scan_add_ies(struct iw_request_info *info, | |
887 | struct cfg80211_bss *bss, | |
888 | char **current_ev, char *end_buf) | |
889 | { | |
890 | u8 *pos, *end, *next; | |
891 | struct iw_event iwe; | |
892 | ||
893 | if (!bss->information_elements || | |
894 | !bss->len_information_elements) | |
895 | return; | |
896 | ||
897 | /* | |
898 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
899 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
900 | */ | |
901 | pos = bss->information_elements; | |
902 | end = pos + bss->len_information_elements; | |
903 | ||
904 | while (end - pos > IW_GENERIC_IE_MAX) { | |
905 | next = pos + 2 + pos[1]; | |
906 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
907 | next = next + 2 + next[1]; | |
908 | ||
909 | memset(&iwe, 0, sizeof(iwe)); | |
910 | iwe.cmd = IWEVGENIE; | |
911 | iwe.u.data.length = next - pos; | |
912 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
913 | end_buf, &iwe, pos); | |
914 | ||
915 | pos = next; | |
916 | } | |
917 | ||
918 | if (end > pos) { | |
919 | memset(&iwe, 0, sizeof(iwe)); | |
920 | iwe.cmd = IWEVGENIE; | |
921 | iwe.u.data.length = end - pos; | |
922 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
923 | end_buf, &iwe, pos); | |
924 | } | |
925 | } | |
926 | ||
cb3a8eec DW |
927 | static inline unsigned int elapsed_jiffies_msecs(unsigned long start) |
928 | { | |
929 | unsigned long end = jiffies; | |
930 | ||
931 | if (end >= start) | |
932 | return jiffies_to_msecs(end - start); | |
933 | ||
934 | return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); | |
935 | } | |
2a519311 JB |
936 | |
937 | static char * | |
77965c97 JB |
938 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
939 | struct cfg80211_internal_bss *bss, char *current_ev, | |
940 | char *end_buf) | |
2a519311 JB |
941 | { |
942 | struct iw_event iwe; | |
943 | u8 *buf, *cfg, *p; | |
944 | u8 *ie = bss->pub.information_elements; | |
a77b8552 | 945 | int rem = bss->pub.len_information_elements, i, sig; |
2a519311 JB |
946 | bool ismesh = false; |
947 | ||
948 | memset(&iwe, 0, sizeof(iwe)); | |
949 | iwe.cmd = SIOCGIWAP; | |
950 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
951 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); | |
952 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
953 | IW_EV_ADDR_LEN); | |
954 | ||
955 | memset(&iwe, 0, sizeof(iwe)); | |
956 | iwe.cmd = SIOCGIWFREQ; | |
957 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); | |
958 | iwe.u.freq.e = 0; | |
959 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
960 | IW_EV_FREQ_LEN); | |
961 | ||
962 | memset(&iwe, 0, sizeof(iwe)); | |
963 | iwe.cmd = SIOCGIWFREQ; | |
964 | iwe.u.freq.m = bss->pub.channel->center_freq; | |
965 | iwe.u.freq.e = 6; | |
966 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
967 | IW_EV_FREQ_LEN); | |
968 | ||
77965c97 | 969 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
2a519311 JB |
970 | memset(&iwe, 0, sizeof(iwe)); |
971 | iwe.cmd = IWEVQUAL; | |
972 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | | |
973 | IW_QUAL_NOISE_INVALID | | |
a77b8552 | 974 | IW_QUAL_QUAL_UPDATED; |
77965c97 | 975 | switch (wiphy->signal_type) { |
2a519311 | 976 | case CFG80211_SIGNAL_TYPE_MBM: |
a77b8552 JB |
977 | sig = bss->pub.signal / 100; |
978 | iwe.u.qual.level = sig; | |
2a519311 | 979 | iwe.u.qual.updated |= IW_QUAL_DBM; |
a77b8552 JB |
980 | if (sig < -110) /* rather bad */ |
981 | sig = -110; | |
982 | else if (sig > -40) /* perfect */ | |
983 | sig = -40; | |
984 | /* will give a range of 0 .. 70 */ | |
985 | iwe.u.qual.qual = sig + 110; | |
2a519311 JB |
986 | break; |
987 | case CFG80211_SIGNAL_TYPE_UNSPEC: | |
988 | iwe.u.qual.level = bss->pub.signal; | |
a77b8552 JB |
989 | /* will give range 0 .. 100 */ |
990 | iwe.u.qual.qual = bss->pub.signal; | |
2a519311 JB |
991 | break; |
992 | default: | |
993 | /* not reached */ | |
994 | break; | |
995 | } | |
996 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
997 | &iwe, IW_EV_QUAL_LEN); | |
998 | } | |
999 | ||
1000 | memset(&iwe, 0, sizeof(iwe)); | |
1001 | iwe.cmd = SIOCGIWENCODE; | |
1002 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) | |
1003 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
1004 | else | |
1005 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1006 | iwe.u.data.length = 0; | |
1007 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1008 | &iwe, ""); | |
1009 | ||
1010 | while (rem >= 2) { | |
1011 | /* invalid data */ | |
1012 | if (ie[1] > rem - 2) | |
1013 | break; | |
1014 | ||
1015 | switch (ie[0]) { | |
1016 | case WLAN_EID_SSID: | |
1017 | memset(&iwe, 0, sizeof(iwe)); | |
1018 | iwe.cmd = SIOCGIWESSID; | |
1019 | iwe.u.data.length = ie[1]; | |
1020 | iwe.u.data.flags = 1; | |
1021 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1022 | &iwe, ie + 2); | |
1023 | break; | |
1024 | case WLAN_EID_MESH_ID: | |
1025 | memset(&iwe, 0, sizeof(iwe)); | |
1026 | iwe.cmd = SIOCGIWESSID; | |
1027 | iwe.u.data.length = ie[1]; | |
1028 | iwe.u.data.flags = 1; | |
1029 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1030 | &iwe, ie + 2); | |
1031 | break; | |
1032 | case WLAN_EID_MESH_CONFIG: | |
1033 | ismesh = true; | |
136cfa28 | 1034 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
1035 | break; |
1036 | buf = kmalloc(50, GFP_ATOMIC); | |
1037 | if (!buf) | |
1038 | break; | |
1039 | cfg = ie + 2; | |
1040 | memset(&iwe, 0, sizeof(iwe)); | |
1041 | iwe.cmd = IWEVCUSTOM; | |
76aa5e70 RP |
1042 | sprintf(buf, "Mesh Network Path Selection Protocol ID: " |
1043 | "0x%02X", cfg[0]); | |
2a519311 JB |
1044 | iwe.u.data.length = strlen(buf); |
1045 | current_ev = iwe_stream_add_point(info, current_ev, | |
1046 | end_buf, | |
1047 | &iwe, buf); | |
76aa5e70 RP |
1048 | sprintf(buf, "Path Selection Metric ID: 0x%02X", |
1049 | cfg[1]); | |
2a519311 JB |
1050 | iwe.u.data.length = strlen(buf); |
1051 | current_ev = iwe_stream_add_point(info, current_ev, | |
1052 | end_buf, | |
1053 | &iwe, buf); | |
76aa5e70 RP |
1054 | sprintf(buf, "Congestion Control Mode ID: 0x%02X", |
1055 | cfg[2]); | |
2a519311 JB |
1056 | iwe.u.data.length = strlen(buf); |
1057 | current_ev = iwe_stream_add_point(info, current_ev, | |
1058 | end_buf, | |
1059 | &iwe, buf); | |
76aa5e70 | 1060 | sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); |
2a519311 JB |
1061 | iwe.u.data.length = strlen(buf); |
1062 | current_ev = iwe_stream_add_point(info, current_ev, | |
1063 | end_buf, | |
1064 | &iwe, buf); | |
76aa5e70 RP |
1065 | sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); |
1066 | iwe.u.data.length = strlen(buf); | |
1067 | current_ev = iwe_stream_add_point(info, current_ev, | |
1068 | end_buf, | |
1069 | &iwe, buf); | |
1070 | sprintf(buf, "Formation Info: 0x%02X", cfg[5]); | |
1071 | iwe.u.data.length = strlen(buf); | |
1072 | current_ev = iwe_stream_add_point(info, current_ev, | |
1073 | end_buf, | |
1074 | &iwe, buf); | |
1075 | sprintf(buf, "Capabilities: 0x%02X", cfg[6]); | |
2a519311 JB |
1076 | iwe.u.data.length = strlen(buf); |
1077 | current_ev = iwe_stream_add_point(info, current_ev, | |
1078 | end_buf, | |
1079 | &iwe, buf); | |
1080 | kfree(buf); | |
1081 | break; | |
1082 | case WLAN_EID_SUPP_RATES: | |
1083 | case WLAN_EID_EXT_SUPP_RATES: | |
1084 | /* display all supported rates in readable format */ | |
1085 | p = current_ev + iwe_stream_lcp_len(info); | |
1086 | ||
1087 | memset(&iwe, 0, sizeof(iwe)); | |
1088 | iwe.cmd = SIOCGIWRATE; | |
1089 | /* Those two flags are ignored... */ | |
1090 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
1091 | ||
1092 | for (i = 0; i < ie[1]; i++) { | |
1093 | iwe.u.bitrate.value = | |
1094 | ((ie[i + 2] & 0x7f) * 500000); | |
1095 | p = iwe_stream_add_value(info, current_ev, p, | |
1096 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
1097 | } | |
1098 | current_ev = p; | |
1099 | break; | |
1100 | } | |
1101 | rem -= ie[1] + 2; | |
1102 | ie += ie[1] + 2; | |
1103 | } | |
1104 | ||
f64f9e71 JP |
1105 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
1106 | ismesh) { | |
2a519311 JB |
1107 | memset(&iwe, 0, sizeof(iwe)); |
1108 | iwe.cmd = SIOCGIWMODE; | |
1109 | if (ismesh) | |
1110 | iwe.u.mode = IW_MODE_MESH; | |
1111 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) | |
1112 | iwe.u.mode = IW_MODE_MASTER; | |
1113 | else | |
1114 | iwe.u.mode = IW_MODE_ADHOC; | |
1115 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
1116 | &iwe, IW_EV_UINT_LEN); | |
1117 | } | |
1118 | ||
1119 | buf = kmalloc(30, GFP_ATOMIC); | |
1120 | if (buf) { | |
1121 | memset(&iwe, 0, sizeof(iwe)); | |
1122 | iwe.cmd = IWEVCUSTOM; | |
1123 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); | |
1124 | iwe.u.data.length = strlen(buf); | |
1125 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1126 | &iwe, buf); | |
1127 | memset(&iwe, 0, sizeof(iwe)); | |
1128 | iwe.cmd = IWEVCUSTOM; | |
cb3a8eec DW |
1129 | sprintf(buf, " Last beacon: %ums ago", |
1130 | elapsed_jiffies_msecs(bss->ts)); | |
2a519311 JB |
1131 | iwe.u.data.length = strlen(buf); |
1132 | current_ev = iwe_stream_add_point(info, current_ev, | |
1133 | end_buf, &iwe, buf); | |
1134 | kfree(buf); | |
1135 | } | |
1136 | ||
1137 | ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); | |
1138 | ||
1139 | return current_ev; | |
1140 | } | |
1141 | ||
1142 | ||
1143 | static int ieee80211_scan_results(struct cfg80211_registered_device *dev, | |
1144 | struct iw_request_info *info, | |
1145 | char *buf, size_t len) | |
1146 | { | |
1147 | char *current_ev = buf; | |
1148 | char *end_buf = buf + len; | |
1149 | struct cfg80211_internal_bss *bss; | |
1150 | ||
1151 | spin_lock_bh(&dev->bss_lock); | |
1152 | cfg80211_bss_expire(dev); | |
1153 | ||
1154 | list_for_each_entry(bss, &dev->bss_list, list) { | |
1155 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
1156 | spin_unlock_bh(&dev->bss_lock); | |
1157 | return -E2BIG; | |
1158 | } | |
77965c97 JB |
1159 | current_ev = ieee80211_bss(&dev->wiphy, info, bss, |
1160 | current_ev, end_buf); | |
2a519311 JB |
1161 | } |
1162 | spin_unlock_bh(&dev->bss_lock); | |
1163 | return current_ev - buf; | |
1164 | } | |
1165 | ||
1166 | ||
1167 | int cfg80211_wext_giwscan(struct net_device *dev, | |
1168 | struct iw_request_info *info, | |
1169 | struct iw_point *data, char *extra) | |
1170 | { | |
1171 | struct cfg80211_registered_device *rdev; | |
1172 | int res; | |
1173 | ||
1174 | if (!netif_running(dev)) | |
1175 | return -ENETDOWN; | |
1176 | ||
463d0183 | 1177 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
1178 | |
1179 | if (IS_ERR(rdev)) | |
1180 | return PTR_ERR(rdev); | |
1181 | ||
1182 | if (rdev->scan_req) { | |
1183 | res = -EAGAIN; | |
1184 | goto out; | |
1185 | } | |
1186 | ||
1187 | res = ieee80211_scan_results(rdev, info, extra, data->length); | |
1188 | data->length = 0; | |
1189 | if (res >= 0) { | |
1190 | data->length = res; | |
1191 | res = 0; | |
1192 | } | |
1193 | ||
1194 | out: | |
4d0c8aea | 1195 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
1196 | return res; |
1197 | } | |
ba44cb72 | 1198 | EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); |
2a519311 | 1199 | #endif |