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Commit | Line | Data |
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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> | |
262eb9b2 | 15 | #include <net/cfg80211-wext.h> |
2a519311 JB |
16 | #include <net/iw_handler.h> |
17 | #include "core.h" | |
18 | #include "nl80211.h" | |
a9a11622 | 19 | #include "wext-compat.h" |
2a519311 | 20 | |
09f97e0f | 21 | #define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ) |
2a519311 | 22 | |
01a0ac41 | 23 | void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak) |
2a519311 | 24 | { |
667503dd | 25 | struct cfg80211_scan_request *request; |
2a519311 | 26 | struct net_device *dev; |
3d23e349 | 27 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
28 | union iwreq_data wrqu; |
29 | #endif | |
30 | ||
01a0ac41 JB |
31 | ASSERT_RDEV_LOCK(rdev); |
32 | ||
667503dd JB |
33 | request = rdev->scan_req; |
34 | ||
01a0ac41 JB |
35 | if (!request) |
36 | return; | |
37 | ||
463d0183 | 38 | dev = request->dev; |
2a519311 | 39 | |
6829c878 JB |
40 | /* |
41 | * This must be before sending the other events! | |
42 | * Otherwise, wpa_supplicant gets completely confused with | |
43 | * wext events. | |
44 | */ | |
45 | cfg80211_sme_scan_done(dev); | |
46 | ||
667503dd | 47 | if (request->aborted) |
36e6fea8 | 48 | nl80211_send_scan_aborted(rdev, dev); |
2a519311 | 49 | else |
36e6fea8 | 50 | nl80211_send_scan_done(rdev, dev); |
2a519311 | 51 | |
3d23e349 | 52 | #ifdef CONFIG_CFG80211_WEXT |
667503dd | 53 | if (!request->aborted) { |
2a519311 JB |
54 | memset(&wrqu, 0, sizeof(wrqu)); |
55 | ||
56 | wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL); | |
57 | } | |
58 | #endif | |
59 | ||
60 | dev_put(dev); | |
61 | ||
36e6fea8 | 62 | rdev->scan_req = NULL; |
01a0ac41 JB |
63 | |
64 | /* | |
65 | * OK. If this is invoked with "leak" then we can't | |
66 | * free this ... but we've cleaned it up anyway. The | |
67 | * driver failed to call the scan_done callback, so | |
68 | * all bets are off, it might still be trying to use | |
69 | * the scan request or not ... if it accesses the dev | |
70 | * in there (it shouldn't anyway) then it may crash. | |
71 | */ | |
72 | if (!leak) | |
73 | kfree(request); | |
2a519311 | 74 | } |
667503dd | 75 | |
36e6fea8 JB |
76 | void __cfg80211_scan_done(struct work_struct *wk) |
77 | { | |
78 | struct cfg80211_registered_device *rdev; | |
79 | ||
80 | rdev = container_of(wk, struct cfg80211_registered_device, | |
81 | scan_done_wk); | |
82 | ||
83 | cfg80211_lock_rdev(rdev); | |
01a0ac41 | 84 | ___cfg80211_scan_done(rdev, false); |
36e6fea8 JB |
85 | cfg80211_unlock_rdev(rdev); |
86 | } | |
87 | ||
667503dd JB |
88 | void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted) |
89 | { | |
667503dd JB |
90 | WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req); |
91 | ||
92 | request->aborted = aborted; | |
e60d7443 | 93 | queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk); |
667503dd | 94 | } |
2a519311 JB |
95 | EXPORT_SYMBOL(cfg80211_scan_done); |
96 | ||
807f8a8c LC |
97 | void __cfg80211_sched_scan_results(struct work_struct *wk) |
98 | { | |
99 | struct cfg80211_registered_device *rdev; | |
100 | ||
101 | rdev = container_of(wk, struct cfg80211_registered_device, | |
102 | sched_scan_results_wk); | |
103 | ||
c10841ca | 104 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c LC |
105 | |
106 | /* we don't have sched_scan_req anymore if the scan is stopping */ | |
107 | if (rdev->sched_scan_req) | |
108 | nl80211_send_sched_scan_results(rdev, | |
109 | rdev->sched_scan_req->dev); | |
110 | ||
c10841ca | 111 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c LC |
112 | } |
113 | ||
114 | void cfg80211_sched_scan_results(struct wiphy *wiphy) | |
115 | { | |
116 | /* ignore if we're not scanning */ | |
117 | if (wiphy_to_dev(wiphy)->sched_scan_req) | |
118 | queue_work(cfg80211_wq, | |
119 | &wiphy_to_dev(wiphy)->sched_scan_results_wk); | |
120 | } | |
121 | EXPORT_SYMBOL(cfg80211_sched_scan_results); | |
122 | ||
85a9994a | 123 | void cfg80211_sched_scan_stopped(struct wiphy *wiphy) |
807f8a8c | 124 | { |
85a9994a | 125 | struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy); |
807f8a8c | 126 | |
c10841ca | 127 | mutex_lock(&rdev->sched_scan_mtx); |
807f8a8c | 128 | __cfg80211_stop_sched_scan(rdev, true); |
c10841ca | 129 | mutex_unlock(&rdev->sched_scan_mtx); |
807f8a8c | 130 | } |
807f8a8c LC |
131 | EXPORT_SYMBOL(cfg80211_sched_scan_stopped); |
132 | ||
133 | int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev, | |
134 | bool driver_initiated) | |
135 | { | |
807f8a8c LC |
136 | struct net_device *dev; |
137 | ||
c10841ca | 138 | lockdep_assert_held(&rdev->sched_scan_mtx); |
807f8a8c LC |
139 | |
140 | if (!rdev->sched_scan_req) | |
1a84ff75 | 141 | return -ENOENT; |
807f8a8c LC |
142 | |
143 | dev = rdev->sched_scan_req->dev; | |
144 | ||
85a9994a | 145 | if (!driver_initiated) { |
3b4670ff | 146 | int err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev); |
85a9994a LC |
147 | if (err) |
148 | return err; | |
149 | } | |
807f8a8c LC |
150 | |
151 | nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED); | |
152 | ||
153 | kfree(rdev->sched_scan_req); | |
154 | rdev->sched_scan_req = NULL; | |
155 | ||
3b4670ff | 156 | return 0; |
807f8a8c LC |
157 | } |
158 | ||
2a519311 JB |
159 | static void bss_release(struct kref *ref) |
160 | { | |
161 | struct cfg80211_internal_bss *bss; | |
162 | ||
163 | bss = container_of(ref, struct cfg80211_internal_bss, ref); | |
78c1c7e1 JB |
164 | if (bss->pub.free_priv) |
165 | bss->pub.free_priv(&bss->pub); | |
cd1658f5 | 166 | |
34a6eddb JM |
167 | if (bss->beacon_ies_allocated) |
168 | kfree(bss->pub.beacon_ies); | |
169 | if (bss->proberesp_ies_allocated) | |
170 | kfree(bss->pub.proberesp_ies); | |
cd1658f5 | 171 | |
19957bb3 JB |
172 | BUG_ON(atomic_read(&bss->hold)); |
173 | ||
2a519311 JB |
174 | kfree(bss); |
175 | } | |
176 | ||
cb3a8eec DW |
177 | /* must hold dev->bss_lock! */ |
178 | void cfg80211_bss_age(struct cfg80211_registered_device *dev, | |
179 | unsigned long age_secs) | |
180 | { | |
181 | struct cfg80211_internal_bss *bss; | |
182 | unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC); | |
183 | ||
184 | list_for_each_entry(bss, &dev->bss_list, list) { | |
185 | bss->ts -= age_jiffies; | |
186 | } | |
187 | } | |
188 | ||
2b78ac9b JO |
189 | /* must hold dev->bss_lock! */ |
190 | static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev, | |
191 | struct cfg80211_internal_bss *bss) | |
192 | { | |
193 | list_del_init(&bss->list); | |
194 | rb_erase(&bss->rbn, &dev->bss_tree); | |
195 | kref_put(&bss->ref, bss_release); | |
196 | } | |
197 | ||
2a519311 JB |
198 | /* must hold dev->bss_lock! */ |
199 | void cfg80211_bss_expire(struct cfg80211_registered_device *dev) | |
200 | { | |
201 | struct cfg80211_internal_bss *bss, *tmp; | |
202 | bool expired = false; | |
203 | ||
204 | list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) { | |
19957bb3 JB |
205 | if (atomic_read(&bss->hold)) |
206 | continue; | |
207 | if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE)) | |
2a519311 | 208 | continue; |
2b78ac9b | 209 | __cfg80211_unlink_bss(dev, bss); |
2a519311 JB |
210 | expired = true; |
211 | } | |
212 | ||
213 | if (expired) | |
214 | dev->bss_generation++; | |
215 | } | |
216 | ||
c21dbf92 | 217 | const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len) |
2a519311 | 218 | { |
c21dbf92 | 219 | while (len > 2 && ies[0] != eid) { |
2a519311 JB |
220 | len -= ies[1] + 2; |
221 | ies += ies[1] + 2; | |
222 | } | |
223 | if (len < 2) | |
224 | return NULL; | |
225 | if (len < 2 + ies[1]) | |
226 | return NULL; | |
227 | return ies; | |
228 | } | |
c21dbf92 | 229 | EXPORT_SYMBOL(cfg80211_find_ie); |
2a519311 | 230 | |
0c28ec58 EP |
231 | const u8 *cfg80211_find_vendor_ie(unsigned int oui, u8 oui_type, |
232 | const u8 *ies, int len) | |
233 | { | |
234 | struct ieee80211_vendor_ie *ie; | |
235 | const u8 *pos = ies, *end = ies + len; | |
236 | int ie_oui; | |
237 | ||
238 | while (pos < end) { | |
239 | pos = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, pos, | |
240 | end - pos); | |
241 | if (!pos) | |
242 | return NULL; | |
243 | ||
244 | if (end - pos < sizeof(*ie)) | |
245 | return NULL; | |
246 | ||
247 | ie = (struct ieee80211_vendor_ie *)pos; | |
248 | ie_oui = ie->oui[0] << 16 | ie->oui[1] << 8 | ie->oui[2]; | |
249 | if (ie_oui == oui && ie->oui_type == oui_type) | |
250 | return pos; | |
251 | ||
252 | pos += 2 + ie->len; | |
253 | } | |
254 | return NULL; | |
255 | } | |
256 | EXPORT_SYMBOL(cfg80211_find_vendor_ie); | |
257 | ||
2a519311 JB |
258 | static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2) |
259 | { | |
c21dbf92 JB |
260 | const u8 *ie1 = cfg80211_find_ie(num, ies1, len1); |
261 | const u8 *ie2 = cfg80211_find_ie(num, ies2, len2); | |
2a519311 | 262 | |
3b6ef633 | 263 | /* equal if both missing */ |
2a519311 JB |
264 | if (!ie1 && !ie2) |
265 | return 0; | |
3b6ef633 JB |
266 | /* sort missing IE before (left of) present IE */ |
267 | if (!ie1) | |
2a519311 | 268 | return -1; |
3b6ef633 JB |
269 | if (!ie2) |
270 | return 1; | |
2a519311 | 271 | |
3b6ef633 JB |
272 | /* sort by length first, then by contents */ |
273 | if (ie1[1] != ie2[1]) | |
2a519311 | 274 | return ie2[1] - ie1[1]; |
3b6ef633 | 275 | return memcmp(ie1 + 2, ie2 + 2, ie1[1]); |
2a519311 JB |
276 | } |
277 | ||
278 | static bool is_bss(struct cfg80211_bss *a, | |
279 | const u8 *bssid, | |
280 | const u8 *ssid, size_t ssid_len) | |
281 | { | |
282 | const u8 *ssidie; | |
283 | ||
79420f09 | 284 | if (bssid && compare_ether_addr(a->bssid, bssid)) |
2a519311 JB |
285 | return false; |
286 | ||
79420f09 JB |
287 | if (!ssid) |
288 | return true; | |
289 | ||
c21dbf92 JB |
290 | ssidie = cfg80211_find_ie(WLAN_EID_SSID, |
291 | a->information_elements, | |
292 | a->len_information_elements); | |
2a519311 JB |
293 | if (!ssidie) |
294 | return false; | |
295 | if (ssidie[1] != ssid_len) | |
296 | return false; | |
297 | return memcmp(ssidie + 2, ssid, ssid_len) == 0; | |
298 | } | |
299 | ||
333ba732 EP |
300 | static bool is_mesh_bss(struct cfg80211_bss *a) |
301 | { | |
302 | const u8 *ie; | |
303 | ||
304 | if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) | |
305 | return false; | |
306 | ||
307 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, | |
308 | a->information_elements, | |
309 | a->len_information_elements); | |
310 | if (!ie) | |
311 | return false; | |
312 | ||
313 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, | |
314 | a->information_elements, | |
315 | a->len_information_elements); | |
316 | if (!ie) | |
317 | return false; | |
318 | ||
319 | return true; | |
320 | } | |
321 | ||
2a519311 JB |
322 | static bool is_mesh(struct cfg80211_bss *a, |
323 | const u8 *meshid, size_t meshidlen, | |
324 | const u8 *meshcfg) | |
325 | { | |
326 | const u8 *ie; | |
327 | ||
333ba732 | 328 | if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability)) |
2a519311 JB |
329 | return false; |
330 | ||
c21dbf92 JB |
331 | ie = cfg80211_find_ie(WLAN_EID_MESH_ID, |
332 | a->information_elements, | |
333 | a->len_information_elements); | |
2a519311 JB |
334 | if (!ie) |
335 | return false; | |
336 | if (ie[1] != meshidlen) | |
337 | return false; | |
338 | if (memcmp(ie + 2, meshid, meshidlen)) | |
339 | return false; | |
340 | ||
c21dbf92 JB |
341 | ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG, |
342 | a->information_elements, | |
343 | a->len_information_elements); | |
cd3468ba JB |
344 | if (!ie) |
345 | return false; | |
136cfa28 | 346 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
347 | return false; |
348 | ||
349 | /* | |
350 | * Ignore mesh capability (last two bytes of the IE) when | |
351 | * comparing since that may differ between stations taking | |
352 | * part in the same mesh. | |
353 | */ | |
136cfa28 RP |
354 | return memcmp(ie + 2, meshcfg, |
355 | sizeof(struct ieee80211_meshconf_ie) - 2) == 0; | |
2a519311 JB |
356 | } |
357 | ||
358 | static int cmp_bss(struct cfg80211_bss *a, | |
359 | struct cfg80211_bss *b) | |
360 | { | |
361 | int r; | |
362 | ||
363 | if (a->channel != b->channel) | |
364 | return b->channel->center_freq - a->channel->center_freq; | |
365 | ||
333ba732 | 366 | if (is_mesh_bss(a) && is_mesh_bss(b)) { |
2a519311 JB |
367 | r = cmp_ies(WLAN_EID_MESH_ID, |
368 | a->information_elements, | |
369 | a->len_information_elements, | |
370 | b->information_elements, | |
371 | b->len_information_elements); | |
372 | if (r) | |
373 | return r; | |
374 | return cmp_ies(WLAN_EID_MESH_CONFIG, | |
375 | a->information_elements, | |
376 | a->len_information_elements, | |
377 | b->information_elements, | |
378 | b->len_information_elements); | |
379 | } | |
380 | ||
0a35d36d JC |
381 | r = memcmp(a->bssid, b->bssid, ETH_ALEN); |
382 | if (r) | |
383 | return r; | |
384 | ||
2a519311 JB |
385 | return cmp_ies(WLAN_EID_SSID, |
386 | a->information_elements, | |
387 | a->len_information_elements, | |
388 | b->information_elements, | |
389 | b->len_information_elements); | |
390 | } | |
391 | ||
392 | struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy, | |
393 | struct ieee80211_channel *channel, | |
394 | const u8 *bssid, | |
79420f09 JB |
395 | const u8 *ssid, size_t ssid_len, |
396 | u16 capa_mask, u16 capa_val) | |
2a519311 JB |
397 | { |
398 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
399 | struct cfg80211_internal_bss *bss, *res = NULL; | |
ccb6c136 | 400 | unsigned long now = jiffies; |
2a519311 JB |
401 | |
402 | spin_lock_bh(&dev->bss_lock); | |
403 | ||
404 | list_for_each_entry(bss, &dev->bss_list, list) { | |
79420f09 JB |
405 | if ((bss->pub.capability & capa_mask) != capa_val) |
406 | continue; | |
2a519311 JB |
407 | if (channel && bss->pub.channel != channel) |
408 | continue; | |
ccb6c136 JB |
409 | /* Don't get expired BSS structs */ |
410 | if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) && | |
411 | !atomic_read(&bss->hold)) | |
412 | continue; | |
2a519311 JB |
413 | if (is_bss(&bss->pub, bssid, ssid, ssid_len)) { |
414 | res = bss; | |
415 | kref_get(&res->ref); | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
420 | spin_unlock_bh(&dev->bss_lock); | |
421 | if (!res) | |
422 | return NULL; | |
423 | return &res->pub; | |
424 | } | |
425 | EXPORT_SYMBOL(cfg80211_get_bss); | |
426 | ||
427 | struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy, | |
428 | struct ieee80211_channel *channel, | |
429 | const u8 *meshid, size_t meshidlen, | |
430 | const u8 *meshcfg) | |
431 | { | |
432 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
433 | struct cfg80211_internal_bss *bss, *res = NULL; | |
434 | ||
435 | spin_lock_bh(&dev->bss_lock); | |
436 | ||
437 | list_for_each_entry(bss, &dev->bss_list, list) { | |
438 | if (channel && bss->pub.channel != channel) | |
439 | continue; | |
440 | if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) { | |
441 | res = bss; | |
442 | kref_get(&res->ref); | |
443 | break; | |
444 | } | |
445 | } | |
446 | ||
447 | spin_unlock_bh(&dev->bss_lock); | |
448 | if (!res) | |
449 | return NULL; | |
450 | return &res->pub; | |
451 | } | |
452 | EXPORT_SYMBOL(cfg80211_get_mesh); | |
453 | ||
454 | ||
455 | static void rb_insert_bss(struct cfg80211_registered_device *dev, | |
456 | struct cfg80211_internal_bss *bss) | |
457 | { | |
458 | struct rb_node **p = &dev->bss_tree.rb_node; | |
459 | struct rb_node *parent = NULL; | |
460 | struct cfg80211_internal_bss *tbss; | |
461 | int cmp; | |
462 | ||
463 | while (*p) { | |
464 | parent = *p; | |
465 | tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn); | |
466 | ||
467 | cmp = cmp_bss(&bss->pub, &tbss->pub); | |
468 | ||
469 | if (WARN_ON(!cmp)) { | |
470 | /* will sort of leak this BSS */ | |
471 | return; | |
472 | } | |
473 | ||
474 | if (cmp < 0) | |
475 | p = &(*p)->rb_left; | |
476 | else | |
477 | p = &(*p)->rb_right; | |
478 | } | |
479 | ||
480 | rb_link_node(&bss->rbn, parent, p); | |
481 | rb_insert_color(&bss->rbn, &dev->bss_tree); | |
482 | } | |
483 | ||
484 | static struct cfg80211_internal_bss * | |
485 | rb_find_bss(struct cfg80211_registered_device *dev, | |
486 | struct cfg80211_internal_bss *res) | |
487 | { | |
488 | struct rb_node *n = dev->bss_tree.rb_node; | |
489 | struct cfg80211_internal_bss *bss; | |
490 | int r; | |
491 | ||
492 | while (n) { | |
493 | bss = rb_entry(n, struct cfg80211_internal_bss, rbn); | |
494 | r = cmp_bss(&res->pub, &bss->pub); | |
495 | ||
496 | if (r == 0) | |
497 | return bss; | |
498 | else if (r < 0) | |
499 | n = n->rb_left; | |
500 | else | |
501 | n = n->rb_right; | |
502 | } | |
503 | ||
504 | return NULL; | |
505 | } | |
506 | ||
507 | static struct cfg80211_internal_bss * | |
508 | cfg80211_bss_update(struct cfg80211_registered_device *dev, | |
34a6eddb | 509 | struct cfg80211_internal_bss *res) |
2a519311 JB |
510 | { |
511 | struct cfg80211_internal_bss *found = NULL; | |
2a519311 JB |
512 | |
513 | /* | |
514 | * The reference to "res" is donated to this function. | |
515 | */ | |
516 | ||
517 | if (WARN_ON(!res->pub.channel)) { | |
518 | kref_put(&res->ref, bss_release); | |
519 | return NULL; | |
520 | } | |
521 | ||
522 | res->ts = jiffies; | |
523 | ||
2a519311 JB |
524 | spin_lock_bh(&dev->bss_lock); |
525 | ||
526 | found = rb_find_bss(dev, res); | |
527 | ||
cd1658f5 | 528 | if (found) { |
2a519311 JB |
529 | found->pub.beacon_interval = res->pub.beacon_interval; |
530 | found->pub.tsf = res->pub.tsf; | |
531 | found->pub.signal = res->pub.signal; | |
2a519311 JB |
532 | found->pub.capability = res->pub.capability; |
533 | found->ts = res->ts; | |
cd1658f5 | 534 | |
34a6eddb JM |
535 | /* Update IEs */ |
536 | if (res->pub.proberesp_ies) { | |
cd1658f5 | 537 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); |
34a6eddb JM |
538 | size_t ielen = res->pub.len_proberesp_ies; |
539 | ||
540 | if (found->pub.proberesp_ies && | |
541 | !found->proberesp_ies_allocated && | |
542 | ksize(found) >= used + ielen) { | |
543 | memcpy(found->pub.proberesp_ies, | |
544 | res->pub.proberesp_ies, ielen); | |
545 | found->pub.len_proberesp_ies = ielen; | |
546 | } else { | |
547 | u8 *ies = found->pub.proberesp_ies; | |
548 | ||
549 | if (found->proberesp_ies_allocated) | |
550 | ies = krealloc(ies, ielen, GFP_ATOMIC); | |
551 | else | |
552 | ies = kmalloc(ielen, GFP_ATOMIC); | |
553 | ||
554 | if (ies) { | |
555 | memcpy(ies, res->pub.proberesp_ies, | |
556 | ielen); | |
557 | found->proberesp_ies_allocated = true; | |
558 | found->pub.proberesp_ies = ies; | |
559 | found->pub.len_proberesp_ies = ielen; | |
560 | } | |
561 | } | |
cd1658f5 | 562 | |
34a6eddb JM |
563 | /* Override possible earlier Beacon frame IEs */ |
564 | found->pub.information_elements = | |
565 | found->pub.proberesp_ies; | |
566 | found->pub.len_information_elements = | |
567 | found->pub.len_proberesp_ies; | |
568 | } | |
569 | if (res->pub.beacon_ies) { | |
570 | size_t used = dev->wiphy.bss_priv_size + sizeof(*res); | |
571 | size_t ielen = res->pub.len_beacon_ies; | |
01123e23 SN |
572 | bool information_elements_is_beacon_ies = |
573 | (found->pub.information_elements == | |
574 | found->pub.beacon_ies); | |
34a6eddb JM |
575 | |
576 | if (found->pub.beacon_ies && | |
577 | !found->beacon_ies_allocated && | |
578 | ksize(found) >= used + ielen) { | |
579 | memcpy(found->pub.beacon_ies, | |
580 | res->pub.beacon_ies, ielen); | |
581 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 | 582 | } else { |
34a6eddb | 583 | u8 *ies = found->pub.beacon_ies; |
cd1658f5 | 584 | |
34a6eddb | 585 | if (found->beacon_ies_allocated) |
273de92c MB |
586 | ies = krealloc(ies, ielen, GFP_ATOMIC); |
587 | else | |
cd1658f5 JB |
588 | ies = kmalloc(ielen, GFP_ATOMIC); |
589 | ||
590 | if (ies) { | |
34a6eddb JM |
591 | memcpy(ies, res->pub.beacon_ies, |
592 | ielen); | |
593 | found->beacon_ies_allocated = true; | |
594 | found->pub.beacon_ies = ies; | |
595 | found->pub.len_beacon_ies = ielen; | |
cd1658f5 JB |
596 | } |
597 | } | |
01123e23 SN |
598 | |
599 | /* Override IEs if they were from a beacon before */ | |
600 | if (information_elements_is_beacon_ies) { | |
601 | found->pub.information_elements = | |
602 | found->pub.beacon_ies; | |
603 | found->pub.len_information_elements = | |
604 | found->pub.len_beacon_ies; | |
605 | } | |
cd1658f5 JB |
606 | } |
607 | ||
2a519311 JB |
608 | kref_put(&res->ref, bss_release); |
609 | } else { | |
610 | /* this "consumes" the reference */ | |
611 | list_add_tail(&res->list, &dev->bss_list); | |
612 | rb_insert_bss(dev, res); | |
613 | found = res; | |
614 | } | |
615 | ||
616 | dev->bss_generation++; | |
617 | spin_unlock_bh(&dev->bss_lock); | |
618 | ||
619 | kref_get(&found->ref); | |
620 | return found; | |
621 | } | |
622 | ||
06aa7afa JK |
623 | struct cfg80211_bss* |
624 | cfg80211_inform_bss(struct wiphy *wiphy, | |
625 | struct ieee80211_channel *channel, | |
626 | const u8 *bssid, | |
627 | u64 timestamp, u16 capability, u16 beacon_interval, | |
628 | const u8 *ie, size_t ielen, | |
629 | s32 signal, gfp_t gfp) | |
630 | { | |
631 | struct cfg80211_internal_bss *res; | |
632 | size_t privsz; | |
633 | ||
634 | if (WARN_ON(!wiphy)) | |
635 | return NULL; | |
636 | ||
637 | privsz = wiphy->bss_priv_size; | |
638 | ||
22fe88d3 | 639 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
06aa7afa JK |
640 | (signal < 0 || signal > 100))) |
641 | return NULL; | |
642 | ||
643 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); | |
644 | if (!res) | |
645 | return NULL; | |
646 | ||
647 | memcpy(res->pub.bssid, bssid, ETH_ALEN); | |
648 | res->pub.channel = channel; | |
649 | res->pub.signal = signal; | |
650 | res->pub.tsf = timestamp; | |
651 | res->pub.beacon_interval = beacon_interval; | |
652 | res->pub.capability = capability; | |
34a6eddb JM |
653 | /* |
654 | * Since we do not know here whether the IEs are from a Beacon or Probe | |
655 | * Response frame, we need to pick one of the options and only use it | |
656 | * with the driver that does not provide the full Beacon/Probe Response | |
657 | * frame. Use Beacon frame pointer to avoid indicating that this should | |
658 | * override the information_elements pointer should we have received an | |
659 | * earlier indication of Probe Response data. | |
660 | * | |
661 | * The initial buffer for the IEs is allocated with the BSS entry and | |
662 | * is located after the private area. | |
663 | */ | |
664 | res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz; | |
665 | memcpy(res->pub.beacon_ies, ie, ielen); | |
666 | res->pub.len_beacon_ies = ielen; | |
667 | res->pub.information_elements = res->pub.beacon_ies; | |
668 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
06aa7afa JK |
669 | |
670 | kref_init(&res->ref); | |
671 | ||
34a6eddb | 672 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
06aa7afa JK |
673 | if (!res) |
674 | return NULL; | |
675 | ||
676 | if (res->pub.capability & WLAN_CAPABILITY_ESS) | |
677 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
678 | ||
679 | /* cfg80211_bss_update gives us a referenced result */ | |
680 | return &res->pub; | |
681 | } | |
682 | EXPORT_SYMBOL(cfg80211_inform_bss); | |
683 | ||
2a519311 JB |
684 | struct cfg80211_bss * |
685 | cfg80211_inform_bss_frame(struct wiphy *wiphy, | |
686 | struct ieee80211_channel *channel, | |
687 | struct ieee80211_mgmt *mgmt, size_t len, | |
77965c97 | 688 | s32 signal, gfp_t gfp) |
2a519311 JB |
689 | { |
690 | struct cfg80211_internal_bss *res; | |
691 | size_t ielen = len - offsetof(struct ieee80211_mgmt, | |
692 | u.probe_resp.variable); | |
bef9bacc MK |
693 | size_t privsz; |
694 | ||
695 | if (WARN_ON(!mgmt)) | |
696 | return NULL; | |
697 | ||
698 | if (WARN_ON(!wiphy)) | |
699 | return NULL; | |
2a519311 | 700 | |
22fe88d3 | 701 | if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC && |
2a519311 JB |
702 | (signal < 0 || signal > 100))) |
703 | return NULL; | |
704 | ||
bef9bacc | 705 | if (WARN_ON(len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable))) |
2a519311 JB |
706 | return NULL; |
707 | ||
bef9bacc MK |
708 | privsz = wiphy->bss_priv_size; |
709 | ||
2a519311 JB |
710 | res = kzalloc(sizeof(*res) + privsz + ielen, gfp); |
711 | if (!res) | |
712 | return NULL; | |
713 | ||
714 | memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN); | |
715 | res->pub.channel = channel; | |
2a519311 JB |
716 | res->pub.signal = signal; |
717 | res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp); | |
718 | res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int); | |
719 | res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info); | |
34a6eddb JM |
720 | /* |
721 | * The initial buffer for the IEs is allocated with the BSS entry and | |
722 | * is located after the private area. | |
723 | */ | |
724 | if (ieee80211_is_probe_resp(mgmt->frame_control)) { | |
725 | res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz; | |
726 | memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable, | |
727 | ielen); | |
728 | res->pub.len_proberesp_ies = ielen; | |
729 | res->pub.information_elements = res->pub.proberesp_ies; | |
730 | res->pub.len_information_elements = res->pub.len_proberesp_ies; | |
731 | } else { | |
732 | res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz; | |
733 | memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen); | |
734 | res->pub.len_beacon_ies = ielen; | |
735 | res->pub.information_elements = res->pub.beacon_ies; | |
736 | res->pub.len_information_elements = res->pub.len_beacon_ies; | |
737 | } | |
2a519311 JB |
738 | |
739 | kref_init(&res->ref); | |
740 | ||
34a6eddb | 741 | res = cfg80211_bss_update(wiphy_to_dev(wiphy), res); |
2a519311 JB |
742 | if (!res) |
743 | return NULL; | |
744 | ||
e38f8a7a LR |
745 | if (res->pub.capability & WLAN_CAPABILITY_ESS) |
746 | regulatory_hint_found_beacon(wiphy, channel, gfp); | |
747 | ||
2a519311 JB |
748 | /* cfg80211_bss_update gives us a referenced result */ |
749 | return &res->pub; | |
750 | } | |
751 | EXPORT_SYMBOL(cfg80211_inform_bss_frame); | |
752 | ||
753 | void cfg80211_put_bss(struct cfg80211_bss *pub) | |
754 | { | |
755 | struct cfg80211_internal_bss *bss; | |
756 | ||
757 | if (!pub) | |
758 | return; | |
759 | ||
760 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
761 | kref_put(&bss->ref, bss_release); | |
762 | } | |
763 | EXPORT_SYMBOL(cfg80211_put_bss); | |
764 | ||
d491af19 JB |
765 | void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub) |
766 | { | |
767 | struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy); | |
768 | struct cfg80211_internal_bss *bss; | |
769 | ||
770 | if (WARN_ON(!pub)) | |
771 | return; | |
772 | ||
773 | bss = container_of(pub, struct cfg80211_internal_bss, pub); | |
774 | ||
775 | spin_lock_bh(&dev->bss_lock); | |
3207390a | 776 | if (!list_empty(&bss->list)) { |
2b78ac9b | 777 | __cfg80211_unlink_bss(dev, bss); |
3207390a | 778 | dev->bss_generation++; |
3207390a | 779 | } |
d491af19 | 780 | spin_unlock_bh(&dev->bss_lock); |
d491af19 JB |
781 | } |
782 | EXPORT_SYMBOL(cfg80211_unlink_bss); | |
783 | ||
3d23e349 | 784 | #ifdef CONFIG_CFG80211_WEXT |
2a519311 JB |
785 | int cfg80211_wext_siwscan(struct net_device *dev, |
786 | struct iw_request_info *info, | |
787 | union iwreq_data *wrqu, char *extra) | |
788 | { | |
789 | struct cfg80211_registered_device *rdev; | |
790 | struct wiphy *wiphy; | |
791 | struct iw_scan_req *wreq = NULL; | |
65486c8b | 792 | struct cfg80211_scan_request *creq = NULL; |
2a519311 JB |
793 | int i, err, n_channels = 0; |
794 | enum ieee80211_band band; | |
795 | ||
796 | if (!netif_running(dev)) | |
797 | return -ENETDOWN; | |
798 | ||
b2e3abdc HS |
799 | if (wrqu->data.length == sizeof(struct iw_scan_req)) |
800 | wreq = (struct iw_scan_req *)extra; | |
801 | ||
463d0183 | 802 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
803 | |
804 | if (IS_ERR(rdev)) | |
805 | return PTR_ERR(rdev); | |
806 | ||
807 | if (rdev->scan_req) { | |
808 | err = -EBUSY; | |
809 | goto out; | |
810 | } | |
811 | ||
812 | wiphy = &rdev->wiphy; | |
813 | ||
b2e3abdc HS |
814 | /* Determine number of channels, needed to allocate creq */ |
815 | if (wreq && wreq->num_channels) | |
816 | n_channels = wreq->num_channels; | |
817 | else { | |
818 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) | |
819 | if (wiphy->bands[band]) | |
820 | n_channels += wiphy->bands[band]->n_channels; | |
821 | } | |
2a519311 JB |
822 | |
823 | creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) + | |
824 | n_channels * sizeof(void *), | |
825 | GFP_ATOMIC); | |
826 | if (!creq) { | |
827 | err = -ENOMEM; | |
828 | goto out; | |
829 | } | |
830 | ||
831 | creq->wiphy = wiphy; | |
463d0183 | 832 | creq->dev = dev; |
5ba63533 JB |
833 | /* SSIDs come after channels */ |
834 | creq->ssids = (void *)&creq->channels[n_channels]; | |
2a519311 JB |
835 | creq->n_channels = n_channels; |
836 | creq->n_ssids = 1; | |
837 | ||
b2e3abdc | 838 | /* translate "Scan on frequencies" request */ |
2a519311 JB |
839 | i = 0; |
840 | for (band = 0; band < IEEE80211_NUM_BANDS; band++) { | |
841 | int j; | |
584991dc | 842 | |
2a519311 JB |
843 | if (!wiphy->bands[band]) |
844 | continue; | |
584991dc | 845 | |
2a519311 | 846 | for (j = 0; j < wiphy->bands[band]->n_channels; j++) { |
584991dc JB |
847 | /* ignore disabled channels */ |
848 | if (wiphy->bands[band]->channels[j].flags & | |
849 | IEEE80211_CHAN_DISABLED) | |
850 | continue; | |
b2e3abdc HS |
851 | |
852 | /* If we have a wireless request structure and the | |
853 | * wireless request specifies frequencies, then search | |
854 | * for the matching hardware channel. | |
855 | */ | |
856 | if (wreq && wreq->num_channels) { | |
857 | int k; | |
858 | int wiphy_freq = wiphy->bands[band]->channels[j].center_freq; | |
859 | for (k = 0; k < wreq->num_channels; k++) { | |
a4e7b730 | 860 | int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]); |
b2e3abdc HS |
861 | if (wext_freq == wiphy_freq) |
862 | goto wext_freq_found; | |
863 | } | |
864 | goto wext_freq_not_found; | |
865 | } | |
866 | ||
867 | wext_freq_found: | |
2a519311 JB |
868 | creq->channels[i] = &wiphy->bands[band]->channels[j]; |
869 | i++; | |
b2e3abdc | 870 | wext_freq_not_found: ; |
2a519311 JB |
871 | } |
872 | } | |
8862dc5f HS |
873 | /* No channels found? */ |
874 | if (!i) { | |
875 | err = -EINVAL; | |
876 | goto out; | |
877 | } | |
2a519311 | 878 | |
b2e3abdc HS |
879 | /* Set real number of channels specified in creq->channels[] */ |
880 | creq->n_channels = i; | |
2a519311 | 881 | |
b2e3abdc HS |
882 | /* translate "Scan for SSID" request */ |
883 | if (wreq) { | |
2a519311 | 884 | if (wrqu->data.flags & IW_SCAN_THIS_ESSID) { |
65486c8b JB |
885 | if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) { |
886 | err = -EINVAL; | |
887 | goto out; | |
888 | } | |
2a519311 JB |
889 | memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len); |
890 | creq->ssids[0].ssid_len = wreq->essid_len; | |
891 | } | |
892 | if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE) | |
893 | creq->n_ssids = 0; | |
894 | } | |
895 | ||
34850ab2 | 896 | for (i = 0; i < IEEE80211_NUM_BANDS; i++) |
a401d2bb JB |
897 | if (wiphy->bands[i]) |
898 | creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1; | |
34850ab2 | 899 | |
2a519311 JB |
900 | rdev->scan_req = creq; |
901 | err = rdev->ops->scan(wiphy, dev, creq); | |
902 | if (err) { | |
903 | rdev->scan_req = NULL; | |
65486c8b | 904 | /* creq will be freed below */ |
463d0183 | 905 | } else { |
a538e2d5 | 906 | nl80211_send_scan_start(rdev, dev); |
65486c8b JB |
907 | /* creq now owned by driver */ |
908 | creq = NULL; | |
463d0183 JB |
909 | dev_hold(dev); |
910 | } | |
2a519311 | 911 | out: |
65486c8b | 912 | kfree(creq); |
4d0c8aea | 913 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
914 | return err; |
915 | } | |
ba44cb72 | 916 | EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan); |
2a519311 JB |
917 | |
918 | static void ieee80211_scan_add_ies(struct iw_request_info *info, | |
919 | struct cfg80211_bss *bss, | |
920 | char **current_ev, char *end_buf) | |
921 | { | |
922 | u8 *pos, *end, *next; | |
923 | struct iw_event iwe; | |
924 | ||
925 | if (!bss->information_elements || | |
926 | !bss->len_information_elements) | |
927 | return; | |
928 | ||
929 | /* | |
930 | * If needed, fragment the IEs buffer (at IE boundaries) into short | |
931 | * enough fragments to fit into IW_GENERIC_IE_MAX octet messages. | |
932 | */ | |
933 | pos = bss->information_elements; | |
934 | end = pos + bss->len_information_elements; | |
935 | ||
936 | while (end - pos > IW_GENERIC_IE_MAX) { | |
937 | next = pos + 2 + pos[1]; | |
938 | while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX) | |
939 | next = next + 2 + next[1]; | |
940 | ||
941 | memset(&iwe, 0, sizeof(iwe)); | |
942 | iwe.cmd = IWEVGENIE; | |
943 | iwe.u.data.length = next - pos; | |
944 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
945 | end_buf, &iwe, pos); | |
946 | ||
947 | pos = next; | |
948 | } | |
949 | ||
950 | if (end > pos) { | |
951 | memset(&iwe, 0, sizeof(iwe)); | |
952 | iwe.cmd = IWEVGENIE; | |
953 | iwe.u.data.length = end - pos; | |
954 | *current_ev = iwe_stream_add_point(info, *current_ev, | |
955 | end_buf, &iwe, pos); | |
956 | } | |
957 | } | |
958 | ||
cb3a8eec DW |
959 | static inline unsigned int elapsed_jiffies_msecs(unsigned long start) |
960 | { | |
961 | unsigned long end = jiffies; | |
962 | ||
963 | if (end >= start) | |
964 | return jiffies_to_msecs(end - start); | |
965 | ||
966 | return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1); | |
967 | } | |
2a519311 JB |
968 | |
969 | static char * | |
77965c97 JB |
970 | ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info, |
971 | struct cfg80211_internal_bss *bss, char *current_ev, | |
972 | char *end_buf) | |
2a519311 JB |
973 | { |
974 | struct iw_event iwe; | |
975 | u8 *buf, *cfg, *p; | |
976 | u8 *ie = bss->pub.information_elements; | |
a77b8552 | 977 | int rem = bss->pub.len_information_elements, i, sig; |
2a519311 JB |
978 | bool ismesh = false; |
979 | ||
980 | memset(&iwe, 0, sizeof(iwe)); | |
981 | iwe.cmd = SIOCGIWAP; | |
982 | iwe.u.ap_addr.sa_family = ARPHRD_ETHER; | |
983 | memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN); | |
984 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
985 | IW_EV_ADDR_LEN); | |
986 | ||
987 | memset(&iwe, 0, sizeof(iwe)); | |
988 | iwe.cmd = SIOCGIWFREQ; | |
989 | iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq); | |
990 | iwe.u.freq.e = 0; | |
991 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
992 | IW_EV_FREQ_LEN); | |
993 | ||
994 | memset(&iwe, 0, sizeof(iwe)); | |
995 | iwe.cmd = SIOCGIWFREQ; | |
996 | iwe.u.freq.m = bss->pub.channel->center_freq; | |
997 | iwe.u.freq.e = 6; | |
998 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe, | |
999 | IW_EV_FREQ_LEN); | |
1000 | ||
77965c97 | 1001 | if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) { |
2a519311 JB |
1002 | memset(&iwe, 0, sizeof(iwe)); |
1003 | iwe.cmd = IWEVQUAL; | |
1004 | iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED | | |
1005 | IW_QUAL_NOISE_INVALID | | |
a77b8552 | 1006 | IW_QUAL_QUAL_UPDATED; |
77965c97 | 1007 | switch (wiphy->signal_type) { |
2a519311 | 1008 | case CFG80211_SIGNAL_TYPE_MBM: |
a77b8552 JB |
1009 | sig = bss->pub.signal / 100; |
1010 | iwe.u.qual.level = sig; | |
2a519311 | 1011 | iwe.u.qual.updated |= IW_QUAL_DBM; |
a77b8552 JB |
1012 | if (sig < -110) /* rather bad */ |
1013 | sig = -110; | |
1014 | else if (sig > -40) /* perfect */ | |
1015 | sig = -40; | |
1016 | /* will give a range of 0 .. 70 */ | |
1017 | iwe.u.qual.qual = sig + 110; | |
2a519311 JB |
1018 | break; |
1019 | case CFG80211_SIGNAL_TYPE_UNSPEC: | |
1020 | iwe.u.qual.level = bss->pub.signal; | |
a77b8552 JB |
1021 | /* will give range 0 .. 100 */ |
1022 | iwe.u.qual.qual = bss->pub.signal; | |
2a519311 JB |
1023 | break; |
1024 | default: | |
1025 | /* not reached */ | |
1026 | break; | |
1027 | } | |
1028 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
1029 | &iwe, IW_EV_QUAL_LEN); | |
1030 | } | |
1031 | ||
1032 | memset(&iwe, 0, sizeof(iwe)); | |
1033 | iwe.cmd = SIOCGIWENCODE; | |
1034 | if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY) | |
1035 | iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY; | |
1036 | else | |
1037 | iwe.u.data.flags = IW_ENCODE_DISABLED; | |
1038 | iwe.u.data.length = 0; | |
1039 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1040 | &iwe, ""); | |
1041 | ||
1042 | while (rem >= 2) { | |
1043 | /* invalid data */ | |
1044 | if (ie[1] > rem - 2) | |
1045 | break; | |
1046 | ||
1047 | switch (ie[0]) { | |
1048 | case WLAN_EID_SSID: | |
1049 | memset(&iwe, 0, sizeof(iwe)); | |
1050 | iwe.cmd = SIOCGIWESSID; | |
1051 | iwe.u.data.length = ie[1]; | |
1052 | iwe.u.data.flags = 1; | |
1053 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1054 | &iwe, ie + 2); | |
1055 | break; | |
1056 | case WLAN_EID_MESH_ID: | |
1057 | memset(&iwe, 0, sizeof(iwe)); | |
1058 | iwe.cmd = SIOCGIWESSID; | |
1059 | iwe.u.data.length = ie[1]; | |
1060 | iwe.u.data.flags = 1; | |
1061 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1062 | &iwe, ie + 2); | |
1063 | break; | |
1064 | case WLAN_EID_MESH_CONFIG: | |
1065 | ismesh = true; | |
136cfa28 | 1066 | if (ie[1] != sizeof(struct ieee80211_meshconf_ie)) |
2a519311 JB |
1067 | break; |
1068 | buf = kmalloc(50, GFP_ATOMIC); | |
1069 | if (!buf) | |
1070 | break; | |
1071 | cfg = ie + 2; | |
1072 | memset(&iwe, 0, sizeof(iwe)); | |
1073 | iwe.cmd = IWEVCUSTOM; | |
76aa5e70 RP |
1074 | sprintf(buf, "Mesh Network Path Selection Protocol ID: " |
1075 | "0x%02X", cfg[0]); | |
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); | |
76aa5e70 RP |
1080 | sprintf(buf, "Path Selection Metric ID: 0x%02X", |
1081 | cfg[1]); | |
2a519311 JB |
1082 | iwe.u.data.length = strlen(buf); |
1083 | current_ev = iwe_stream_add_point(info, current_ev, | |
1084 | end_buf, | |
1085 | &iwe, buf); | |
76aa5e70 RP |
1086 | sprintf(buf, "Congestion Control Mode ID: 0x%02X", |
1087 | cfg[2]); | |
2a519311 JB |
1088 | iwe.u.data.length = strlen(buf); |
1089 | current_ev = iwe_stream_add_point(info, current_ev, | |
1090 | end_buf, | |
1091 | &iwe, buf); | |
76aa5e70 | 1092 | sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]); |
2a519311 JB |
1093 | iwe.u.data.length = strlen(buf); |
1094 | current_ev = iwe_stream_add_point(info, current_ev, | |
1095 | end_buf, | |
1096 | &iwe, buf); | |
76aa5e70 RP |
1097 | sprintf(buf, "Authentication ID: 0x%02X", cfg[4]); |
1098 | iwe.u.data.length = strlen(buf); | |
1099 | current_ev = iwe_stream_add_point(info, current_ev, | |
1100 | end_buf, | |
1101 | &iwe, buf); | |
1102 | sprintf(buf, "Formation Info: 0x%02X", cfg[5]); | |
1103 | iwe.u.data.length = strlen(buf); | |
1104 | current_ev = iwe_stream_add_point(info, current_ev, | |
1105 | end_buf, | |
1106 | &iwe, buf); | |
1107 | sprintf(buf, "Capabilities: 0x%02X", cfg[6]); | |
2a519311 JB |
1108 | iwe.u.data.length = strlen(buf); |
1109 | current_ev = iwe_stream_add_point(info, current_ev, | |
1110 | end_buf, | |
1111 | &iwe, buf); | |
1112 | kfree(buf); | |
1113 | break; | |
1114 | case WLAN_EID_SUPP_RATES: | |
1115 | case WLAN_EID_EXT_SUPP_RATES: | |
1116 | /* display all supported rates in readable format */ | |
1117 | p = current_ev + iwe_stream_lcp_len(info); | |
1118 | ||
1119 | memset(&iwe, 0, sizeof(iwe)); | |
1120 | iwe.cmd = SIOCGIWRATE; | |
1121 | /* Those two flags are ignored... */ | |
1122 | iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0; | |
1123 | ||
1124 | for (i = 0; i < ie[1]; i++) { | |
1125 | iwe.u.bitrate.value = | |
1126 | ((ie[i + 2] & 0x7f) * 500000); | |
1127 | p = iwe_stream_add_value(info, current_ev, p, | |
1128 | end_buf, &iwe, IW_EV_PARAM_LEN); | |
1129 | } | |
1130 | current_ev = p; | |
1131 | break; | |
1132 | } | |
1133 | rem -= ie[1] + 2; | |
1134 | ie += ie[1] + 2; | |
1135 | } | |
1136 | ||
f64f9e71 JP |
1137 | if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) || |
1138 | ismesh) { | |
2a519311 JB |
1139 | memset(&iwe, 0, sizeof(iwe)); |
1140 | iwe.cmd = SIOCGIWMODE; | |
1141 | if (ismesh) | |
1142 | iwe.u.mode = IW_MODE_MESH; | |
1143 | else if (bss->pub.capability & WLAN_CAPABILITY_ESS) | |
1144 | iwe.u.mode = IW_MODE_MASTER; | |
1145 | else | |
1146 | iwe.u.mode = IW_MODE_ADHOC; | |
1147 | current_ev = iwe_stream_add_event(info, current_ev, end_buf, | |
1148 | &iwe, IW_EV_UINT_LEN); | |
1149 | } | |
1150 | ||
1151 | buf = kmalloc(30, GFP_ATOMIC); | |
1152 | if (buf) { | |
1153 | memset(&iwe, 0, sizeof(iwe)); | |
1154 | iwe.cmd = IWEVCUSTOM; | |
1155 | sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf)); | |
1156 | iwe.u.data.length = strlen(buf); | |
1157 | current_ev = iwe_stream_add_point(info, current_ev, end_buf, | |
1158 | &iwe, buf); | |
1159 | memset(&iwe, 0, sizeof(iwe)); | |
1160 | iwe.cmd = IWEVCUSTOM; | |
cb3a8eec DW |
1161 | sprintf(buf, " Last beacon: %ums ago", |
1162 | elapsed_jiffies_msecs(bss->ts)); | |
2a519311 JB |
1163 | iwe.u.data.length = strlen(buf); |
1164 | current_ev = iwe_stream_add_point(info, current_ev, | |
1165 | end_buf, &iwe, buf); | |
1166 | kfree(buf); | |
1167 | } | |
1168 | ||
1169 | ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf); | |
1170 | ||
1171 | return current_ev; | |
1172 | } | |
1173 | ||
1174 | ||
1175 | static int ieee80211_scan_results(struct cfg80211_registered_device *dev, | |
1176 | struct iw_request_info *info, | |
1177 | char *buf, size_t len) | |
1178 | { | |
1179 | char *current_ev = buf; | |
1180 | char *end_buf = buf + len; | |
1181 | struct cfg80211_internal_bss *bss; | |
1182 | ||
1183 | spin_lock_bh(&dev->bss_lock); | |
1184 | cfg80211_bss_expire(dev); | |
1185 | ||
1186 | list_for_each_entry(bss, &dev->bss_list, list) { | |
1187 | if (buf + len - current_ev <= IW_EV_ADDR_LEN) { | |
1188 | spin_unlock_bh(&dev->bss_lock); | |
1189 | return -E2BIG; | |
1190 | } | |
77965c97 JB |
1191 | current_ev = ieee80211_bss(&dev->wiphy, info, bss, |
1192 | current_ev, end_buf); | |
2a519311 JB |
1193 | } |
1194 | spin_unlock_bh(&dev->bss_lock); | |
1195 | return current_ev - buf; | |
1196 | } | |
1197 | ||
1198 | ||
1199 | int cfg80211_wext_giwscan(struct net_device *dev, | |
1200 | struct iw_request_info *info, | |
1201 | struct iw_point *data, char *extra) | |
1202 | { | |
1203 | struct cfg80211_registered_device *rdev; | |
1204 | int res; | |
1205 | ||
1206 | if (!netif_running(dev)) | |
1207 | return -ENETDOWN; | |
1208 | ||
463d0183 | 1209 | rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex); |
2a519311 JB |
1210 | |
1211 | if (IS_ERR(rdev)) | |
1212 | return PTR_ERR(rdev); | |
1213 | ||
1214 | if (rdev->scan_req) { | |
1215 | res = -EAGAIN; | |
1216 | goto out; | |
1217 | } | |
1218 | ||
1219 | res = ieee80211_scan_results(rdev, info, extra, data->length); | |
1220 | data->length = 0; | |
1221 | if (res >= 0) { | |
1222 | data->length = res; | |
1223 | res = 0; | |
1224 | } | |
1225 | ||
1226 | out: | |
4d0c8aea | 1227 | cfg80211_unlock_rdev(rdev); |
2a519311 JB |
1228 | return res; |
1229 | } | |
ba44cb72 | 1230 | EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan); |
2a519311 | 1231 | #endif |