2 * cfg80211 scan result handling
4 * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
6 #include <linux/kernel.h>
7 #include <linux/slab.h>
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>
14 #include <net/cfg80211.h>
15 #include <net/iw_handler.h>
18 #include "wext-compat.h"
20 #define IEEE80211_SCAN_RESULT_EXPIRE (15 * HZ)
22 void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
24 struct cfg80211_scan_request *request;
25 struct net_device *dev;
26 #ifdef CONFIG_CFG80211_WEXT
27 union iwreq_data wrqu;
30 ASSERT_RDEV_LOCK(rdev);
32 request = rdev->scan_req;
40 * This must be before sending the other events!
41 * Otherwise, wpa_supplicant gets completely confused with
44 cfg80211_sme_scan_done(dev);
47 nl80211_send_scan_aborted(rdev, dev);
49 nl80211_send_scan_done(rdev, dev);
51 #ifdef CONFIG_CFG80211_WEXT
52 if (!request->aborted) {
53 memset(&wrqu, 0, sizeof(wrqu));
55 wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
61 rdev->scan_req = NULL;
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.
75 void __cfg80211_scan_done(struct work_struct *wk)
77 struct cfg80211_registered_device *rdev;
79 rdev = container_of(wk, struct cfg80211_registered_device,
82 cfg80211_lock_rdev(rdev);
83 ___cfg80211_scan_done(rdev, false);
84 cfg80211_unlock_rdev(rdev);
87 void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
89 WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
91 request->aborted = aborted;
92 queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk);
94 EXPORT_SYMBOL(cfg80211_scan_done);
96 static void bss_release(struct kref *ref)
98 struct cfg80211_internal_bss *bss;
100 bss = container_of(ref, struct cfg80211_internal_bss, ref);
101 if (bss->pub.free_priv)
102 bss->pub.free_priv(&bss->pub);
104 if (bss->beacon_ies_allocated)
105 kfree(bss->pub.beacon_ies);
106 if (bss->proberesp_ies_allocated)
107 kfree(bss->pub.proberesp_ies);
109 BUG_ON(atomic_read(&bss->hold));
114 /* must hold dev->bss_lock! */
115 void cfg80211_bss_age(struct cfg80211_registered_device *dev,
116 unsigned long age_secs)
118 struct cfg80211_internal_bss *bss;
119 unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
121 list_for_each_entry(bss, &dev->bss_list, list) {
122 bss->ts -= age_jiffies;
126 /* must hold dev->bss_lock! */
127 void cfg80211_bss_expire(struct cfg80211_registered_device *dev)
129 struct cfg80211_internal_bss *bss, *tmp;
130 bool expired = false;
132 list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) {
133 if (atomic_read(&bss->hold))
135 if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE))
137 list_del(&bss->list);
138 rb_erase(&bss->rbn, &dev->bss_tree);
139 kref_put(&bss->ref, bss_release);
144 dev->bss_generation++;
147 const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len)
149 while (len > 2 && ies[0] != eid) {
155 if (len < 2 + ies[1])
159 EXPORT_SYMBOL(cfg80211_find_ie);
161 static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2)
163 const u8 *ie1 = cfg80211_find_ie(num, ies1, len1);
164 const u8 *ie2 = cfg80211_find_ie(num, ies2, len2);
172 r = memcmp(ie1 + 2, ie2 + 2, min(ie1[1], ie2[1]));
173 if (r == 0 && ie1[1] != ie2[1])
174 return ie2[1] - ie1[1];
178 static bool is_bss(struct cfg80211_bss *a,
180 const u8 *ssid, size_t ssid_len)
184 if (bssid && compare_ether_addr(a->bssid, bssid))
190 ssidie = cfg80211_find_ie(WLAN_EID_SSID,
191 a->information_elements,
192 a->len_information_elements);
195 if (ssidie[1] != ssid_len)
197 return memcmp(ssidie + 2, ssid, ssid_len) == 0;
200 static bool is_mesh(struct cfg80211_bss *a,
201 const u8 *meshid, size_t meshidlen,
206 if (!is_zero_ether_addr(a->bssid))
209 ie = cfg80211_find_ie(WLAN_EID_MESH_ID,
210 a->information_elements,
211 a->len_information_elements);
214 if (ie[1] != meshidlen)
216 if (memcmp(ie + 2, meshid, meshidlen))
219 ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG,
220 a->information_elements,
221 a->len_information_elements);
224 if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
228 * Ignore mesh capability (last two bytes of the IE) when
229 * comparing since that may differ between stations taking
230 * part in the same mesh.
232 return memcmp(ie + 2, meshcfg,
233 sizeof(struct ieee80211_meshconf_ie) - 2) == 0;
236 static int cmp_bss(struct cfg80211_bss *a,
237 struct cfg80211_bss *b)
241 if (a->channel != b->channel)
242 return b->channel->center_freq - a->channel->center_freq;
244 r = memcmp(a->bssid, b->bssid, ETH_ALEN);
248 if (is_zero_ether_addr(a->bssid)) {
249 r = cmp_ies(WLAN_EID_MESH_ID,
250 a->information_elements,
251 a->len_information_elements,
252 b->information_elements,
253 b->len_information_elements);
256 return cmp_ies(WLAN_EID_MESH_CONFIG,
257 a->information_elements,
258 a->len_information_elements,
259 b->information_elements,
260 b->len_information_elements);
263 return cmp_ies(WLAN_EID_SSID,
264 a->information_elements,
265 a->len_information_elements,
266 b->information_elements,
267 b->len_information_elements);
270 struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
271 struct ieee80211_channel *channel,
273 const u8 *ssid, size_t ssid_len,
274 u16 capa_mask, u16 capa_val)
276 struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
277 struct cfg80211_internal_bss *bss, *res = NULL;
278 unsigned long now = jiffies;
280 spin_lock_bh(&dev->bss_lock);
282 list_for_each_entry(bss, &dev->bss_list, list) {
283 if ((bss->pub.capability & capa_mask) != capa_val)
285 if (channel && bss->pub.channel != channel)
287 /* Don't get expired BSS structs */
288 if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) &&
289 !atomic_read(&bss->hold))
291 if (is_bss(&bss->pub, bssid, ssid, ssid_len)) {
298 spin_unlock_bh(&dev->bss_lock);
303 EXPORT_SYMBOL(cfg80211_get_bss);
305 struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy,
306 struct ieee80211_channel *channel,
307 const u8 *meshid, size_t meshidlen,
310 struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
311 struct cfg80211_internal_bss *bss, *res = NULL;
313 spin_lock_bh(&dev->bss_lock);
315 list_for_each_entry(bss, &dev->bss_list, list) {
316 if (channel && bss->pub.channel != channel)
318 if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) {
325 spin_unlock_bh(&dev->bss_lock);
330 EXPORT_SYMBOL(cfg80211_get_mesh);
333 static void rb_insert_bss(struct cfg80211_registered_device *dev,
334 struct cfg80211_internal_bss *bss)
336 struct rb_node **p = &dev->bss_tree.rb_node;
337 struct rb_node *parent = NULL;
338 struct cfg80211_internal_bss *tbss;
343 tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn);
345 cmp = cmp_bss(&bss->pub, &tbss->pub);
348 /* will sort of leak this BSS */
358 rb_link_node(&bss->rbn, parent, p);
359 rb_insert_color(&bss->rbn, &dev->bss_tree);
362 static struct cfg80211_internal_bss *
363 rb_find_bss(struct cfg80211_registered_device *dev,
364 struct cfg80211_internal_bss *res)
366 struct rb_node *n = dev->bss_tree.rb_node;
367 struct cfg80211_internal_bss *bss;
371 bss = rb_entry(n, struct cfg80211_internal_bss, rbn);
372 r = cmp_bss(&res->pub, &bss->pub);
385 static struct cfg80211_internal_bss *
386 cfg80211_bss_update(struct cfg80211_registered_device *dev,
387 struct cfg80211_internal_bss *res)
389 struct cfg80211_internal_bss *found = NULL;
390 const u8 *meshid, *meshcfg;
393 * The reference to "res" is donated to this function.
396 if (WARN_ON(!res->pub.channel)) {
397 kref_put(&res->ref, bss_release);
403 if (is_zero_ether_addr(res->pub.bssid)) {
404 /* must be mesh, verify */
405 meshid = cfg80211_find_ie(WLAN_EID_MESH_ID,
406 res->pub.information_elements,
407 res->pub.len_information_elements);
408 meshcfg = cfg80211_find_ie(WLAN_EID_MESH_CONFIG,
409 res->pub.information_elements,
410 res->pub.len_information_elements);
411 if (!meshid || !meshcfg ||
412 meshcfg[1] != sizeof(struct ieee80211_meshconf_ie)) {
414 kref_put(&res->ref, bss_release);
419 spin_lock_bh(&dev->bss_lock);
421 found = rb_find_bss(dev, res);
424 found->pub.beacon_interval = res->pub.beacon_interval;
425 found->pub.tsf = res->pub.tsf;
426 found->pub.signal = res->pub.signal;
427 found->pub.capability = res->pub.capability;
431 if (res->pub.proberesp_ies) {
432 size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
433 size_t ielen = res->pub.len_proberesp_ies;
435 if (found->pub.proberesp_ies &&
436 !found->proberesp_ies_allocated &&
437 ksize(found) >= used + ielen) {
438 memcpy(found->pub.proberesp_ies,
439 res->pub.proberesp_ies, ielen);
440 found->pub.len_proberesp_ies = ielen;
442 u8 *ies = found->pub.proberesp_ies;
444 if (found->proberesp_ies_allocated)
445 ies = krealloc(ies, ielen, GFP_ATOMIC);
447 ies = kmalloc(ielen, GFP_ATOMIC);
450 memcpy(ies, res->pub.proberesp_ies,
452 found->proberesp_ies_allocated = true;
453 found->pub.proberesp_ies = ies;
454 found->pub.len_proberesp_ies = ielen;
458 /* Override possible earlier Beacon frame IEs */
459 found->pub.information_elements =
460 found->pub.proberesp_ies;
461 found->pub.len_information_elements =
462 found->pub.len_proberesp_ies;
464 if (res->pub.beacon_ies) {
465 size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
466 size_t ielen = res->pub.len_beacon_ies;
467 bool information_elements_is_beacon_ies =
468 (found->pub.information_elements ==
469 found->pub.beacon_ies);
471 if (found->pub.beacon_ies &&
472 !found->beacon_ies_allocated &&
473 ksize(found) >= used + ielen) {
474 memcpy(found->pub.beacon_ies,
475 res->pub.beacon_ies, ielen);
476 found->pub.len_beacon_ies = ielen;
478 u8 *ies = found->pub.beacon_ies;
480 if (found->beacon_ies_allocated)
481 ies = krealloc(ies, ielen, GFP_ATOMIC);
483 ies = kmalloc(ielen, GFP_ATOMIC);
486 memcpy(ies, res->pub.beacon_ies,
488 found->beacon_ies_allocated = true;
489 found->pub.beacon_ies = ies;
490 found->pub.len_beacon_ies = ielen;
494 /* Override IEs if they were from a beacon before */
495 if (information_elements_is_beacon_ies) {
496 found->pub.information_elements =
497 found->pub.beacon_ies;
498 found->pub.len_information_elements =
499 found->pub.len_beacon_ies;
503 kref_put(&res->ref, bss_release);
505 /* this "consumes" the reference */
506 list_add_tail(&res->list, &dev->bss_list);
507 rb_insert_bss(dev, res);
511 dev->bss_generation++;
512 spin_unlock_bh(&dev->bss_lock);
514 kref_get(&found->ref);
519 cfg80211_inform_bss(struct wiphy *wiphy,
520 struct ieee80211_channel *channel,
522 u64 timestamp, u16 capability, u16 beacon_interval,
523 const u8 *ie, size_t ielen,
524 s32 signal, gfp_t gfp)
526 struct cfg80211_internal_bss *res;
532 privsz = wiphy->bss_priv_size;
534 if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
535 (signal < 0 || signal > 100)))
538 res = kzalloc(sizeof(*res) + privsz + ielen, gfp);
542 memcpy(res->pub.bssid, bssid, ETH_ALEN);
543 res->pub.channel = channel;
544 res->pub.signal = signal;
545 res->pub.tsf = timestamp;
546 res->pub.beacon_interval = beacon_interval;
547 res->pub.capability = capability;
549 * Since we do not know here whether the IEs are from a Beacon or Probe
550 * Response frame, we need to pick one of the options and only use it
551 * with the driver that does not provide the full Beacon/Probe Response
552 * frame. Use Beacon frame pointer to avoid indicating that this should
553 * override the information_elements pointer should we have received an
554 * earlier indication of Probe Response data.
556 * The initial buffer for the IEs is allocated with the BSS entry and
557 * is located after the private area.
559 res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz;
560 memcpy(res->pub.beacon_ies, ie, ielen);
561 res->pub.len_beacon_ies = ielen;
562 res->pub.information_elements = res->pub.beacon_ies;
563 res->pub.len_information_elements = res->pub.len_beacon_ies;
565 kref_init(&res->ref);
567 res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
571 if (res->pub.capability & WLAN_CAPABILITY_ESS)
572 regulatory_hint_found_beacon(wiphy, channel, gfp);
574 /* cfg80211_bss_update gives us a referenced result */
577 EXPORT_SYMBOL(cfg80211_inform_bss);
579 struct cfg80211_bss *
580 cfg80211_inform_bss_frame(struct wiphy *wiphy,
581 struct ieee80211_channel *channel,
582 struct ieee80211_mgmt *mgmt, size_t len,
583 s32 signal, gfp_t gfp)
585 struct cfg80211_internal_bss *res;
586 size_t ielen = len - offsetof(struct ieee80211_mgmt,
587 u.probe_resp.variable);
588 size_t privsz = wiphy->bss_priv_size;
590 if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
591 (signal < 0 || signal > 100)))
594 if (WARN_ON(!mgmt || !wiphy ||
595 len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable)))
598 res = kzalloc(sizeof(*res) + privsz + ielen, gfp);
602 memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN);
603 res->pub.channel = channel;
604 res->pub.signal = signal;
605 res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp);
606 res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int);
607 res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info);
609 * The initial buffer for the IEs is allocated with the BSS entry and
610 * is located after the private area.
612 if (ieee80211_is_probe_resp(mgmt->frame_control)) {
613 res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz;
614 memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable,
616 res->pub.len_proberesp_ies = ielen;
617 res->pub.information_elements = res->pub.proberesp_ies;
618 res->pub.len_information_elements = res->pub.len_proberesp_ies;
620 res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz;
621 memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen);
622 res->pub.len_beacon_ies = ielen;
623 res->pub.information_elements = res->pub.beacon_ies;
624 res->pub.len_information_elements = res->pub.len_beacon_ies;
627 kref_init(&res->ref);
629 res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
633 if (res->pub.capability & WLAN_CAPABILITY_ESS)
634 regulatory_hint_found_beacon(wiphy, channel, gfp);
636 /* cfg80211_bss_update gives us a referenced result */
639 EXPORT_SYMBOL(cfg80211_inform_bss_frame);
641 void cfg80211_put_bss(struct cfg80211_bss *pub)
643 struct cfg80211_internal_bss *bss;
648 bss = container_of(pub, struct cfg80211_internal_bss, pub);
649 kref_put(&bss->ref, bss_release);
651 EXPORT_SYMBOL(cfg80211_put_bss);
653 void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
655 struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
656 struct cfg80211_internal_bss *bss;
661 bss = container_of(pub, struct cfg80211_internal_bss, pub);
663 spin_lock_bh(&dev->bss_lock);
664 if (!list_empty(&bss->list)) {
665 list_del_init(&bss->list);
666 dev->bss_generation++;
667 rb_erase(&bss->rbn, &dev->bss_tree);
669 kref_put(&bss->ref, bss_release);
671 spin_unlock_bh(&dev->bss_lock);
673 EXPORT_SYMBOL(cfg80211_unlink_bss);
675 #ifdef CONFIG_CFG80211_WEXT
676 int cfg80211_wext_siwscan(struct net_device *dev,
677 struct iw_request_info *info,
678 union iwreq_data *wrqu, char *extra)
680 struct cfg80211_registered_device *rdev;
682 struct iw_scan_req *wreq = NULL;
683 struct cfg80211_scan_request *creq = NULL;
684 int i, err, n_channels = 0;
685 enum ieee80211_band band;
687 if (!netif_running(dev))
690 if (wrqu->data.length == sizeof(struct iw_scan_req))
691 wreq = (struct iw_scan_req *)extra;
693 rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex);
696 return PTR_ERR(rdev);
698 if (rdev->scan_req) {
703 wiphy = &rdev->wiphy;
705 /* Determine number of channels, needed to allocate creq */
706 if (wreq && wreq->num_channels)
707 n_channels = wreq->num_channels;
709 for (band = 0; band < IEEE80211_NUM_BANDS; band++)
710 if (wiphy->bands[band])
711 n_channels += wiphy->bands[band]->n_channels;
714 creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
715 n_channels * sizeof(void *),
724 /* SSIDs come after channels */
725 creq->ssids = (void *)&creq->channels[n_channels];
726 creq->n_channels = n_channels;
729 /* translate "Scan on frequencies" request */
731 for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
734 if (!wiphy->bands[band])
737 for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
738 /* ignore disabled channels */
739 if (wiphy->bands[band]->channels[j].flags &
740 IEEE80211_CHAN_DISABLED)
743 /* If we have a wireless request structure and the
744 * wireless request specifies frequencies, then search
745 * for the matching hardware channel.
747 if (wreq && wreq->num_channels) {
749 int wiphy_freq = wiphy->bands[band]->channels[j].center_freq;
750 for (k = 0; k < wreq->num_channels; k++) {
751 int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]);
752 if (wext_freq == wiphy_freq)
753 goto wext_freq_found;
755 goto wext_freq_not_found;
759 creq->channels[i] = &wiphy->bands[band]->channels[j];
761 wext_freq_not_found: ;
764 /* No channels found? */
770 /* Set real number of channels specified in creq->channels[] */
771 creq->n_channels = i;
773 /* translate "Scan for SSID" request */
775 if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
776 if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) {
780 memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len);
781 creq->ssids[0].ssid_len = wreq->essid_len;
783 if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE)
787 rdev->scan_req = creq;
788 err = rdev->ops->scan(wiphy, dev, creq);
790 rdev->scan_req = NULL;
791 /* creq will be freed below */
793 nl80211_send_scan_start(rdev, dev);
794 /* creq now owned by driver */
800 cfg80211_unlock_rdev(rdev);
803 EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan);
805 static void ieee80211_scan_add_ies(struct iw_request_info *info,
806 struct cfg80211_bss *bss,
807 char **current_ev, char *end_buf)
809 u8 *pos, *end, *next;
812 if (!bss->information_elements ||
813 !bss->len_information_elements)
817 * If needed, fragment the IEs buffer (at IE boundaries) into short
818 * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
820 pos = bss->information_elements;
821 end = pos + bss->len_information_elements;
823 while (end - pos > IW_GENERIC_IE_MAX) {
824 next = pos + 2 + pos[1];
825 while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
826 next = next + 2 + next[1];
828 memset(&iwe, 0, sizeof(iwe));
830 iwe.u.data.length = next - pos;
831 *current_ev = iwe_stream_add_point(info, *current_ev,
838 memset(&iwe, 0, sizeof(iwe));
840 iwe.u.data.length = end - pos;
841 *current_ev = iwe_stream_add_point(info, *current_ev,
846 static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
848 unsigned long end = jiffies;
851 return jiffies_to_msecs(end - start);
853 return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
857 ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info,
858 struct cfg80211_internal_bss *bss, char *current_ev,
863 u8 *ie = bss->pub.information_elements;
864 int rem = bss->pub.len_information_elements, i, sig;
867 memset(&iwe, 0, sizeof(iwe));
869 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
870 memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN);
871 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
874 memset(&iwe, 0, sizeof(iwe));
875 iwe.cmd = SIOCGIWFREQ;
876 iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq);
878 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
881 memset(&iwe, 0, sizeof(iwe));
882 iwe.cmd = SIOCGIWFREQ;
883 iwe.u.freq.m = bss->pub.channel->center_freq;
885 current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
888 if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) {
889 memset(&iwe, 0, sizeof(iwe));
891 iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED |
892 IW_QUAL_NOISE_INVALID |
893 IW_QUAL_QUAL_UPDATED;
894 switch (wiphy->signal_type) {
895 case CFG80211_SIGNAL_TYPE_MBM:
896 sig = bss->pub.signal / 100;
897 iwe.u.qual.level = sig;
898 iwe.u.qual.updated |= IW_QUAL_DBM;
899 if (sig < -110) /* rather bad */
901 else if (sig > -40) /* perfect */
903 /* will give a range of 0 .. 70 */
904 iwe.u.qual.qual = sig + 110;
906 case CFG80211_SIGNAL_TYPE_UNSPEC:
907 iwe.u.qual.level = bss->pub.signal;
908 /* will give range 0 .. 100 */
909 iwe.u.qual.qual = bss->pub.signal;
915 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
916 &iwe, IW_EV_QUAL_LEN);
919 memset(&iwe, 0, sizeof(iwe));
920 iwe.cmd = SIOCGIWENCODE;
921 if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY)
922 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
924 iwe.u.data.flags = IW_ENCODE_DISABLED;
925 iwe.u.data.length = 0;
926 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
936 memset(&iwe, 0, sizeof(iwe));
937 iwe.cmd = SIOCGIWESSID;
938 iwe.u.data.length = ie[1];
939 iwe.u.data.flags = 1;
940 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
943 case WLAN_EID_MESH_ID:
944 memset(&iwe, 0, sizeof(iwe));
945 iwe.cmd = SIOCGIWESSID;
946 iwe.u.data.length = ie[1];
947 iwe.u.data.flags = 1;
948 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
951 case WLAN_EID_MESH_CONFIG:
953 if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
955 buf = kmalloc(50, GFP_ATOMIC);
959 memset(&iwe, 0, sizeof(iwe));
960 iwe.cmd = IWEVCUSTOM;
961 sprintf(buf, "Mesh Network Path Selection Protocol ID: "
963 iwe.u.data.length = strlen(buf);
964 current_ev = iwe_stream_add_point(info, current_ev,
967 sprintf(buf, "Path Selection Metric ID: 0x%02X",
969 iwe.u.data.length = strlen(buf);
970 current_ev = iwe_stream_add_point(info, current_ev,
973 sprintf(buf, "Congestion Control Mode ID: 0x%02X",
975 iwe.u.data.length = strlen(buf);
976 current_ev = iwe_stream_add_point(info, current_ev,
979 sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]);
980 iwe.u.data.length = strlen(buf);
981 current_ev = iwe_stream_add_point(info, current_ev,
984 sprintf(buf, "Authentication ID: 0x%02X", cfg[4]);
985 iwe.u.data.length = strlen(buf);
986 current_ev = iwe_stream_add_point(info, current_ev,
989 sprintf(buf, "Formation Info: 0x%02X", cfg[5]);
990 iwe.u.data.length = strlen(buf);
991 current_ev = iwe_stream_add_point(info, current_ev,
994 sprintf(buf, "Capabilities: 0x%02X", cfg[6]);
995 iwe.u.data.length = strlen(buf);
996 current_ev = iwe_stream_add_point(info, current_ev,
1001 case WLAN_EID_SUPP_RATES:
1002 case WLAN_EID_EXT_SUPP_RATES:
1003 /* display all supported rates in readable format */
1004 p = current_ev + iwe_stream_lcp_len(info);
1006 memset(&iwe, 0, sizeof(iwe));
1007 iwe.cmd = SIOCGIWRATE;
1008 /* Those two flags are ignored... */
1009 iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
1011 for (i = 0; i < ie[1]; i++) {
1012 iwe.u.bitrate.value =
1013 ((ie[i + 2] & 0x7f) * 500000);
1014 p = iwe_stream_add_value(info, current_ev, p,
1015 end_buf, &iwe, IW_EV_PARAM_LEN);
1024 if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) ||
1026 memset(&iwe, 0, sizeof(iwe));
1027 iwe.cmd = SIOCGIWMODE;
1029 iwe.u.mode = IW_MODE_MESH;
1030 else if (bss->pub.capability & WLAN_CAPABILITY_ESS)
1031 iwe.u.mode = IW_MODE_MASTER;
1033 iwe.u.mode = IW_MODE_ADHOC;
1034 current_ev = iwe_stream_add_event(info, current_ev, end_buf,
1035 &iwe, IW_EV_UINT_LEN);
1038 buf = kmalloc(30, GFP_ATOMIC);
1040 memset(&iwe, 0, sizeof(iwe));
1041 iwe.cmd = IWEVCUSTOM;
1042 sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf));
1043 iwe.u.data.length = strlen(buf);
1044 current_ev = iwe_stream_add_point(info, current_ev, end_buf,
1046 memset(&iwe, 0, sizeof(iwe));
1047 iwe.cmd = IWEVCUSTOM;
1048 sprintf(buf, " Last beacon: %ums ago",
1049 elapsed_jiffies_msecs(bss->ts));
1050 iwe.u.data.length = strlen(buf);
1051 current_ev = iwe_stream_add_point(info, current_ev,
1052 end_buf, &iwe, buf);
1056 ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf);
1062 static int ieee80211_scan_results(struct cfg80211_registered_device *dev,
1063 struct iw_request_info *info,
1064 char *buf, size_t len)
1066 char *current_ev = buf;
1067 char *end_buf = buf + len;
1068 struct cfg80211_internal_bss *bss;
1070 spin_lock_bh(&dev->bss_lock);
1071 cfg80211_bss_expire(dev);
1073 list_for_each_entry(bss, &dev->bss_list, list) {
1074 if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
1075 spin_unlock_bh(&dev->bss_lock);
1078 current_ev = ieee80211_bss(&dev->wiphy, info, bss,
1079 current_ev, end_buf);
1081 spin_unlock_bh(&dev->bss_lock);
1082 return current_ev - buf;
1086 int cfg80211_wext_giwscan(struct net_device *dev,
1087 struct iw_request_info *info,
1088 struct iw_point *data, char *extra)
1090 struct cfg80211_registered_device *rdev;
1093 if (!netif_running(dev))
1096 rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex);
1099 return PTR_ERR(rdev);
1101 if (rdev->scan_req) {
1106 res = ieee80211_scan_results(rdev, info, extra, data->length);
1114 cfg80211_unlock_rdev(rdev);
1117 EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan);