[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/net/wireless/scan.c b/ap/os/linux/linux-3.4.x/net/wireless/scan.c
new file mode 100644
index 0000000..e40104f
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/net/wireless/scan.c
@@ -0,0 +1,1353 @@
+/*
+ * cfg80211 scan result handling
+ *
+ * Copyright 2008 Johannes Berg <johannes@sipsolutions.net>
+ */
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
+#include <linux/wireless.h>
+#include <linux/nl80211.h>
+#include <linux/etherdevice.h>
+#include <net/arp.h>
+#include <net/cfg80211.h>
+#include <net/cfg80211-wext.h>
+#include <net/iw_handler.h>
+#include "core.h"
+#include "nl80211.h"
+#include "wext-compat.h"
+
+#define IEEE80211_SCAN_RESULT_EXPIRE (3 * HZ)
+
+void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev, bool leak)
+{
+ struct cfg80211_scan_request *request;
+ struct net_device *dev;
+#ifdef CONFIG_CFG80211_WEXT
+ union iwreq_data wrqu;
+#endif
+
+ ASSERT_RDEV_LOCK(rdev);
+
+ request = rdev->scan_req;
+
+ if (!request)
+ return;
+
+ dev = request->dev;
+
+ /*
+ * This must be before sending the other events!
+ * Otherwise, wpa_supplicant gets completely confused with
+ * wext events.
+ */
+ cfg80211_sme_scan_done(dev);
+
+ if (request->aborted)
+ nl80211_send_scan_aborted(rdev, dev);
+ else
+ nl80211_send_scan_done(rdev, dev);
+
+#ifdef CONFIG_CFG80211_WEXT
+ if (!request->aborted) {
+ memset(&wrqu, 0, sizeof(wrqu));
+
+ wireless_send_event(dev, SIOCGIWSCAN, &wrqu, NULL);
+ }
+#endif
+
+ dev_put(dev);
+
+ rdev->scan_req = NULL;
+
+ /*
+ * OK. If this is invoked with "leak" then we can't
+ * free this ... but we've cleaned it up anyway. The
+ * driver failed to call the scan_done callback, so
+ * all bets are off, it might still be trying to use
+ * the scan request or not ... if it accesses the dev
+ * in there (it shouldn't anyway) then it may crash.
+ */
+ if (!leak)
+ kfree(request);
+}
+
+void __cfg80211_scan_done(struct work_struct *wk)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(wk, struct cfg80211_registered_device,
+ scan_done_wk);
+
+ cfg80211_lock_rdev(rdev);
+ ___cfg80211_scan_done(rdev, false);
+ cfg80211_unlock_rdev(rdev);
+}
+
+void cfg80211_scan_done(struct cfg80211_scan_request *request, bool aborted)
+{
+ WARN_ON(request != wiphy_to_dev(request->wiphy)->scan_req);
+
+ request->aborted = aborted;
+ queue_work(cfg80211_wq, &wiphy_to_dev(request->wiphy)->scan_done_wk);
+}
+EXPORT_SYMBOL(cfg80211_scan_done);
+
+void __cfg80211_sched_scan_results(struct work_struct *wk)
+{
+ struct cfg80211_registered_device *rdev;
+
+ rdev = container_of(wk, struct cfg80211_registered_device,
+ sched_scan_results_wk);
+
+ mutex_lock(&rdev->sched_scan_mtx);
+
+ /* we don't have sched_scan_req anymore if the scan is stopping */
+ if (rdev->sched_scan_req)
+ nl80211_send_sched_scan_results(rdev,
+ rdev->sched_scan_req->dev);
+
+ mutex_unlock(&rdev->sched_scan_mtx);
+}
+
+void cfg80211_sched_scan_results(struct wiphy *wiphy)
+{
+ /* ignore if we're not scanning */
+ if (wiphy_to_dev(wiphy)->sched_scan_req)
+ queue_work(cfg80211_wq,
+ &wiphy_to_dev(wiphy)->sched_scan_results_wk);
+}
+EXPORT_SYMBOL(cfg80211_sched_scan_results);
+
+void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ mutex_lock(&rdev->sched_scan_mtx);
+ __cfg80211_stop_sched_scan(rdev, true);
+ mutex_unlock(&rdev->sched_scan_mtx);
+}
+EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
+
+int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
+ bool driver_initiated)
+{
+ struct net_device *dev;
+
+ lockdep_assert_held(&rdev->sched_scan_mtx);
+
+ if (!rdev->sched_scan_req)
+ return -ENOENT;
+
+ dev = rdev->sched_scan_req->dev;
+
+ if (!driver_initiated) {
+ int err = rdev->ops->sched_scan_stop(&rdev->wiphy, dev);
+ if (err)
+ return err;
+ }
+
+ nl80211_send_sched_scan(rdev, dev, NL80211_CMD_SCHED_SCAN_STOPPED);
+
+ kfree(rdev->sched_scan_req);
+ rdev->sched_scan_req = NULL;
+
+ return 0;
+}
+
+static void bss_release(struct kref *ref)
+{
+ struct cfg80211_internal_bss *bss;
+
+ bss = container_of(ref, struct cfg80211_internal_bss, ref);
+ if (bss->pub.free_priv)
+ bss->pub.free_priv(&bss->pub);
+
+ if (bss->beacon_ies_allocated)
+ kfree(bss->pub.beacon_ies);
+ if (bss->proberesp_ies_allocated)
+ kfree(bss->pub.proberesp_ies);
+
+ BUG_ON(atomic_read(&bss->hold));
+
+ kfree(bss);
+}
+
+/* must hold dev->bss_lock! */
+void cfg80211_bss_age(struct cfg80211_registered_device *dev,
+ unsigned long age_secs)
+{
+ struct cfg80211_internal_bss *bss;
+ unsigned long age_jiffies = msecs_to_jiffies(age_secs * MSEC_PER_SEC);
+
+ list_for_each_entry(bss, &dev->bss_list, list) {
+ bss->ts -= age_jiffies;
+ }
+}
+
+/* must hold dev->bss_lock! */
+static void __cfg80211_unlink_bss(struct cfg80211_registered_device *dev,
+ struct cfg80211_internal_bss *bss)
+{
+ list_del_init(&bss->list);
+ rb_erase(&bss->rbn, &dev->bss_tree);
+ kref_put(&bss->ref, bss_release);
+}
+
+/* must hold dev->bss_lock! */
+void cfg80211_bss_expire(struct cfg80211_registered_device *dev)
+{
+ struct cfg80211_internal_bss *bss, *tmp;
+ bool expired = false;
+
+ list_for_each_entry_safe(bss, tmp, &dev->bss_list, list) {
+ if (atomic_read(&bss->hold))
+ continue;
+ if (!time_after(jiffies, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE))
+ continue;
+ __cfg80211_unlink_bss(dev, bss);
+ expired = true;
+ }
+
+ if (expired)
+ dev->bss_generation++;
+}
+
+const u8 *cfg80211_find_ie(u8 eid, const u8 *ies, int len)
+{
+ while (len > 2 && ies[0] != eid) {
+ len -= ies[1] + 2;
+ ies += ies[1] + 2;
+ }
+ if (len < 2)
+ return NULL;
+ if (len < 2 + ies[1])
+ return NULL;
+ return ies;
+}
+EXPORT_SYMBOL(cfg80211_find_ie);
+
+const u8 *cfg80211_find_vendor_ie(unsigned int oui, u8 oui_type,
+ const u8 *ies, int len)
+{
+ struct ieee80211_vendor_ie *ie;
+ const u8 *pos = ies, *end = ies + len;
+ int ie_oui;
+
+ while (pos < end) {
+ pos = cfg80211_find_ie(WLAN_EID_VENDOR_SPECIFIC, pos,
+ end - pos);
+ if (!pos)
+ return NULL;
+
+ if (end - pos < sizeof(*ie))
+ return NULL;
+
+ ie = (struct ieee80211_vendor_ie *)pos;
+ ie_oui = ie->oui[0] << 16 | ie->oui[1] << 8 | ie->oui[2];
+ if (ie_oui == oui && ie->oui_type == oui_type)
+ return pos;
+
+ pos += 2 + ie->len;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(cfg80211_find_vendor_ie);
+
+static int cmp_ies(u8 num, u8 *ies1, size_t len1, u8 *ies2, size_t len2)
+{
+ const u8 *ie1 = cfg80211_find_ie(num, ies1, len1);
+ const u8 *ie2 = cfg80211_find_ie(num, ies2, len2);
+
+ /* equal if both missing */
+ if (!ie1 && !ie2)
+ return 0;
+ /* sort missing IE before (left of) present IE */
+ if (!ie1)
+ return -1;
+ if (!ie2)
+ return 1;
+
+ /* sort by length first, then by contents */
+ if (ie1[1] != ie2[1])
+ return ie2[1] - ie1[1];
+ return memcmp(ie1 + 2, ie2 + 2, ie1[1]);
+}
+
+static bool is_bss(struct cfg80211_bss *a,
+ const u8 *bssid,
+ const u8 *ssid, size_t ssid_len)
+{
+ const u8 *ssidie;
+
+ if (bssid && compare_ether_addr(a->bssid, bssid))
+ return false;
+
+ if (!ssid)
+ return true;
+
+ ssidie = cfg80211_find_ie(WLAN_EID_SSID,
+ a->information_elements,
+ a->len_information_elements);
+ if (!ssidie)
+ return false;
+ if (ssidie[1] != ssid_len)
+ return false;
+ return memcmp(ssidie + 2, ssid, ssid_len) == 0;
+}
+
+static bool is_mesh_bss(struct cfg80211_bss *a)
+{
+ const u8 *ie;
+
+ if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability))
+ return false;
+
+ ie = cfg80211_find_ie(WLAN_EID_MESH_ID,
+ a->information_elements,
+ a->len_information_elements);
+ if (!ie)
+ return false;
+
+ ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG,
+ a->information_elements,
+ a->len_information_elements);
+ if (!ie)
+ return false;
+
+ return true;
+}
+
+static bool is_mesh(struct cfg80211_bss *a,
+ const u8 *meshid, size_t meshidlen,
+ const u8 *meshcfg)
+{
+ const u8 *ie;
+
+ if (!WLAN_CAPABILITY_IS_STA_BSS(a->capability))
+ return false;
+
+ ie = cfg80211_find_ie(WLAN_EID_MESH_ID,
+ a->information_elements,
+ a->len_information_elements);
+ if (!ie)
+ return false;
+ if (ie[1] != meshidlen)
+ return false;
+ if (memcmp(ie + 2, meshid, meshidlen))
+ return false;
+
+ ie = cfg80211_find_ie(WLAN_EID_MESH_CONFIG,
+ a->information_elements,
+ a->len_information_elements);
+ if (!ie)
+ return false;
+ if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
+ return false;
+
+ /*
+ * Ignore mesh capability (last two bytes of the IE) when
+ * comparing since that may differ between stations taking
+ * part in the same mesh.
+ */
+ return memcmp(ie + 2, meshcfg,
+ sizeof(struct ieee80211_meshconf_ie) - 2) == 0;
+}
+
+static int cmp_bss_core(struct cfg80211_bss *a,
+ struct cfg80211_bss *b)
+{
+ int r;
+
+ if (a->channel != b->channel)
+ return b->channel->center_freq - a->channel->center_freq;
+
+ if (is_mesh_bss(a) && is_mesh_bss(b)) {
+ r = cmp_ies(WLAN_EID_MESH_ID,
+ a->information_elements,
+ a->len_information_elements,
+ b->information_elements,
+ b->len_information_elements);
+ if (r)
+ return r;
+ return cmp_ies(WLAN_EID_MESH_CONFIG,
+ a->information_elements,
+ a->len_information_elements,
+ b->information_elements,
+ b->len_information_elements);
+ }
+
+ return memcmp(a->bssid, b->bssid, ETH_ALEN);
+}
+
+static int cmp_bss(struct cfg80211_bss *a,
+ struct cfg80211_bss *b)
+{
+ int r;
+
+ r = cmp_bss_core(a, b);
+ if (r)
+ return r;
+
+ return cmp_ies(WLAN_EID_SSID,
+ a->information_elements,
+ a->len_information_elements,
+ b->information_elements,
+ b->len_information_elements);
+}
+
+static int cmp_hidden_bss(struct cfg80211_bss *a,
+ struct cfg80211_bss *b)
+{
+ const u8 *ie1;
+ const u8 *ie2;
+ int i;
+ int r;
+
+ r = cmp_bss_core(a, b);
+ if (r)
+ return r;
+
+ ie1 = cfg80211_find_ie(WLAN_EID_SSID,
+ a->information_elements,
+ a->len_information_elements);
+ ie2 = cfg80211_find_ie(WLAN_EID_SSID,
+ b->information_elements,
+ b->len_information_elements);
+
+ /* Key comparator must use same algorithm in any rb-tree
+ * search function (order is important), otherwise ordering
+ * of items in the tree is broken and search gives incorrect
+ * results. This code uses same order as cmp_ies() does. */
+
+ /* sort missing IE before (left of) present IE */
+ if (!ie1)
+ return -1;
+ if (!ie2)
+ return 1;
+
+ /* zero-size SSID is used as an indication of the hidden bss */
+ if (!ie2[1])
+ return 0;
+
+ /* sort by length first, then by contents */
+ if (ie1[1] != ie2[1])
+ return ie2[1] - ie1[1];
+
+ /* zeroed SSID ie is another indication of a hidden bss */
+ for (i = 0; i < ie2[1]; i++)
+ if (ie2[i + 2])
+ return -1;
+
+ return 0;
+}
+
+struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,
+ struct ieee80211_channel *channel,
+ const u8 *bssid,
+ const u8 *ssid, size_t ssid_len,
+ u16 capa_mask, u16 capa_val)
+{
+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
+ struct cfg80211_internal_bss *bss, *res = NULL;
+ unsigned long now = jiffies;
+
+ spin_lock_bh(&dev->bss_lock);
+
+ list_for_each_entry(bss, &dev->bss_list, list) {
+ if ((bss->pub.capability & capa_mask) != capa_val)
+ continue;
+ if (channel && bss->pub.channel != channel)
+ continue;
+ /* Don't get expired BSS structs */
+ if (time_after(now, bss->ts + IEEE80211_SCAN_RESULT_EXPIRE) &&
+ !atomic_read(&bss->hold))
+ continue;
+ if (is_bss(&bss->pub, bssid, ssid, ssid_len)) {
+ res = bss;
+ kref_get(&res->ref);
+ break;
+ }
+ }
+
+ spin_unlock_bh(&dev->bss_lock);
+ if (!res)
+ return NULL;
+ return &res->pub;
+}
+EXPORT_SYMBOL(cfg80211_get_bss);
+
+struct cfg80211_bss *cfg80211_get_mesh(struct wiphy *wiphy,
+ struct ieee80211_channel *channel,
+ const u8 *meshid, size_t meshidlen,
+ const u8 *meshcfg)
+{
+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
+ struct cfg80211_internal_bss *bss, *res = NULL;
+
+ spin_lock_bh(&dev->bss_lock);
+
+ list_for_each_entry(bss, &dev->bss_list, list) {
+ if (channel && bss->pub.channel != channel)
+ continue;
+ if (is_mesh(&bss->pub, meshid, meshidlen, meshcfg)) {
+ res = bss;
+ kref_get(&res->ref);
+ break;
+ }
+ }
+
+ spin_unlock_bh(&dev->bss_lock);
+ if (!res)
+ return NULL;
+ return &res->pub;
+}
+EXPORT_SYMBOL(cfg80211_get_mesh);
+
+
+static void rb_insert_bss(struct cfg80211_registered_device *dev,
+ struct cfg80211_internal_bss *bss)
+{
+ struct rb_node **p = &dev->bss_tree.rb_node;
+ struct rb_node *parent = NULL;
+ struct cfg80211_internal_bss *tbss;
+ int cmp;
+
+ while (*p) {
+ parent = *p;
+ tbss = rb_entry(parent, struct cfg80211_internal_bss, rbn);
+
+ cmp = cmp_bss(&bss->pub, &tbss->pub);
+
+ if (WARN_ON(!cmp)) {
+ /* will sort of leak this BSS */
+ return;
+ }
+
+ if (cmp < 0)
+ p = &(*p)->rb_left;
+ else
+ p = &(*p)->rb_right;
+ }
+
+ rb_link_node(&bss->rbn, parent, p);
+ rb_insert_color(&bss->rbn, &dev->bss_tree);
+}
+
+static struct cfg80211_internal_bss *
+rb_find_bss(struct cfg80211_registered_device *dev,
+ struct cfg80211_internal_bss *res)
+{
+ struct rb_node *n = dev->bss_tree.rb_node;
+ struct cfg80211_internal_bss *bss;
+ int r;
+
+ while (n) {
+ bss = rb_entry(n, struct cfg80211_internal_bss, rbn);
+ r = cmp_bss(&res->pub, &bss->pub);
+
+ if (r == 0)
+ return bss;
+ else if (r < 0)
+ n = n->rb_left;
+ else
+ n = n->rb_right;
+ }
+
+ return NULL;
+}
+
+static struct cfg80211_internal_bss *
+rb_find_hidden_bss(struct cfg80211_registered_device *dev,
+ struct cfg80211_internal_bss *res)
+{
+ struct rb_node *n = dev->bss_tree.rb_node;
+ struct cfg80211_internal_bss *bss;
+ int r;
+
+ while (n) {
+ bss = rb_entry(n, struct cfg80211_internal_bss, rbn);
+ r = cmp_hidden_bss(&res->pub, &bss->pub);
+
+ if (r == 0)
+ return bss;
+ else if (r < 0)
+ n = n->rb_left;
+ else
+ n = n->rb_right;
+ }
+
+ return NULL;
+}
+
+static void
+copy_hidden_ies(struct cfg80211_internal_bss *res,
+ struct cfg80211_internal_bss *hidden)
+{
+ if (unlikely(res->pub.beacon_ies))
+ return;
+ if (WARN_ON(!hidden->pub.beacon_ies))
+ return;
+
+ res->pub.beacon_ies = kmalloc(hidden->pub.len_beacon_ies, GFP_ATOMIC);
+ if (unlikely(!res->pub.beacon_ies))
+ return;
+
+ res->beacon_ies_allocated = true;
+ res->pub.len_beacon_ies = hidden->pub.len_beacon_ies;
+ memcpy(res->pub.beacon_ies, hidden->pub.beacon_ies,
+ res->pub.len_beacon_ies);
+}
+
+static struct cfg80211_internal_bss *
+cfg80211_bss_update(struct cfg80211_registered_device *dev,
+ struct cfg80211_internal_bss *res)
+{
+ struct cfg80211_internal_bss *found = NULL;
+
+ /*
+ * The reference to "res" is donated to this function.
+ */
+
+ if (WARN_ON(!res->pub.channel)) {
+ kref_put(&res->ref, bss_release);
+ return NULL;
+ }
+
+ res->ts = jiffies;
+
+ spin_lock_bh(&dev->bss_lock);
+
+ found = rb_find_bss(dev, res);
+
+ if (found) {
+ found->pub.beacon_interval = res->pub.beacon_interval;
+ found->pub.tsf = res->pub.tsf;
+ found->pub.signal = res->pub.signal;
+ found->pub.capability = res->pub.capability;
+ found->ts = res->ts;
+
+ /* Update IEs */
+ if (res->pub.proberesp_ies) {
+ size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
+ size_t ielen = res->pub.len_proberesp_ies;
+
+ if (found->pub.proberesp_ies &&
+ !found->proberesp_ies_allocated &&
+ ksize(found) >= used + ielen) {
+ memcpy(found->pub.proberesp_ies,
+ res->pub.proberesp_ies, ielen);
+ found->pub.len_proberesp_ies = ielen;
+ } else {
+ u8 *ies = found->pub.proberesp_ies;
+
+ if (found->proberesp_ies_allocated)
+ ies = krealloc(ies, ielen, GFP_ATOMIC);
+ else
+ ies = kmalloc(ielen, GFP_ATOMIC);
+
+ if (ies) {
+ memcpy(ies, res->pub.proberesp_ies,
+ ielen);
+ found->proberesp_ies_allocated = true;
+ found->pub.proberesp_ies = ies;
+ found->pub.len_proberesp_ies = ielen;
+ }
+ }
+
+ /* Override possible earlier Beacon frame IEs */
+ found->pub.information_elements =
+ found->pub.proberesp_ies;
+ found->pub.len_information_elements =
+ found->pub.len_proberesp_ies;
+ }
+ if (res->pub.beacon_ies) {
+ size_t used = dev->wiphy.bss_priv_size + sizeof(*res);
+ size_t ielen = res->pub.len_beacon_ies;
+ bool information_elements_is_beacon_ies =
+ (found->pub.information_elements ==
+ found->pub.beacon_ies);
+
+ if (found->pub.beacon_ies &&
+ !found->beacon_ies_allocated &&
+ ksize(found) >= used + ielen) {
+ memcpy(found->pub.beacon_ies,
+ res->pub.beacon_ies, ielen);
+ found->pub.len_beacon_ies = ielen;
+ } else {
+ u8 *ies = found->pub.beacon_ies;
+
+ if (found->beacon_ies_allocated)
+ ies = krealloc(ies, ielen, GFP_ATOMIC);
+ else
+ ies = kmalloc(ielen, GFP_ATOMIC);
+
+ if (ies) {
+ memcpy(ies, res->pub.beacon_ies,
+ ielen);
+ found->beacon_ies_allocated = true;
+ found->pub.beacon_ies = ies;
+ found->pub.len_beacon_ies = ielen;
+ }
+ }
+
+ /* Override IEs if they were from a beacon before */
+ if (information_elements_is_beacon_ies) {
+ found->pub.information_elements =
+ found->pub.beacon_ies;
+ found->pub.len_information_elements =
+ found->pub.len_beacon_ies;
+ }
+ }
+
+ kref_put(&res->ref, bss_release);
+ } else {
+ struct cfg80211_internal_bss *hidden;
+
+ /* First check if the beacon is a probe response from
+ * a hidden bss. If so, copy beacon ies (with nullified
+ * ssid) into the probe response bss entry (with real ssid).
+ * It is required basically for PSM implementation
+ * (probe responses do not contain tim ie) */
+
+ /* TODO: The code is not trying to update existing probe
+ * response bss entries when beacon ies are
+ * getting changed. */
+ hidden = rb_find_hidden_bss(dev, res);
+ if (hidden)
+ copy_hidden_ies(res, hidden);
+
+ /* this "consumes" the reference */
+ list_add_tail(&res->list, &dev->bss_list);
+ rb_insert_bss(dev, res);
+ found = res;
+ }
+
+ dev->bss_generation++;
+ spin_unlock_bh(&dev->bss_lock);
+
+ kref_get(&found->ref);
+ return found;
+}
+
+struct cfg80211_bss*
+cfg80211_inform_bss(struct wiphy *wiphy,
+ struct ieee80211_channel *channel,
+ const u8 *bssid, u64 tsf, u16 capability,
+ u16 beacon_interval, const u8 *ie, size_t ielen,
+ s32 signal, gfp_t gfp)
+{
+ struct cfg80211_internal_bss *res;
+ size_t privsz;
+
+ if (WARN_ON(!wiphy))
+ return NULL;
+
+ privsz = wiphy->bss_priv_size;
+
+ if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
+ (signal < 0 || signal > 100)))
+ return NULL;
+
+ res = kzalloc(sizeof(*res) + privsz + ielen, gfp);
+ if (!res)
+ return NULL;
+
+ memcpy(res->pub.bssid, bssid, ETH_ALEN);
+ res->pub.channel = channel;
+ res->pub.signal = signal;
+ res->pub.tsf = tsf;
+ res->pub.beacon_interval = beacon_interval;
+ res->pub.capability = capability;
+ /*
+ * Since we do not know here whether the IEs are from a Beacon or Probe
+ * Response frame, we need to pick one of the options and only use it
+ * with the driver that does not provide the full Beacon/Probe Response
+ * frame. Use Beacon frame pointer to avoid indicating that this should
+ * override the information_elements pointer should we have received an
+ * earlier indication of Probe Response data.
+ *
+ * The initial buffer for the IEs is allocated with the BSS entry and
+ * is located after the private area.
+ */
+ res->pub.beacon_ies = (u8 *)res + sizeof(*res) + privsz;
+ memcpy(res->pub.beacon_ies, ie, ielen);
+ res->pub.len_beacon_ies = ielen;
+ res->pub.information_elements = res->pub.beacon_ies;
+ res->pub.len_information_elements = res->pub.len_beacon_ies;
+
+ kref_init(&res->ref);
+
+ res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
+ if (!res)
+ return NULL;
+
+ if (res->pub.capability & WLAN_CAPABILITY_ESS)
+ regulatory_hint_found_beacon(wiphy, channel, gfp);
+
+ /* cfg80211_bss_update gives us a referenced result */
+ return &res->pub;
+}
+EXPORT_SYMBOL(cfg80211_inform_bss);
+
+struct cfg80211_bss *
+cfg80211_inform_bss_frame(struct wiphy *wiphy,
+ struct ieee80211_channel *channel,
+ struct ieee80211_mgmt *mgmt, size_t len,
+ s32 signal, gfp_t gfp)
+{
+ struct cfg80211_internal_bss *res;
+ size_t ielen = len - offsetof(struct ieee80211_mgmt,
+ u.probe_resp.variable);
+ size_t privsz;
+
+ if (WARN_ON(!mgmt))
+ return NULL;
+
+ if (WARN_ON(!wiphy))
+ return NULL;
+
+ if (WARN_ON(wiphy->signal_type == CFG80211_SIGNAL_TYPE_UNSPEC &&
+ (signal < 0 || signal > 100)))
+ return NULL;
+
+ if (WARN_ON(len < offsetof(struct ieee80211_mgmt, u.probe_resp.variable)))
+ return NULL;
+
+ privsz = wiphy->bss_priv_size;
+
+ res = kzalloc(sizeof(*res) + privsz + ielen, gfp);
+ if (!res)
+ return NULL;
+
+ memcpy(res->pub.bssid, mgmt->bssid, ETH_ALEN);
+ res->pub.channel = channel;
+ res->pub.signal = signal;
+ res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp);
+ res->pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int);
+ res->pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info);
+ /*
+ * The initial buffer for the IEs is allocated with the BSS entry and
+ * is located after the private area.
+ */
+ if (ieee80211_is_probe_resp(mgmt->frame_control)) {
+ res->pub.proberesp_ies = (u8 *) res + sizeof(*res) + privsz;
+ memcpy(res->pub.proberesp_ies, mgmt->u.probe_resp.variable,
+ ielen);
+ res->pub.len_proberesp_ies = ielen;
+ res->pub.information_elements = res->pub.proberesp_ies;
+ res->pub.len_information_elements = res->pub.len_proberesp_ies;
+ } else {
+ res->pub.beacon_ies = (u8 *) res + sizeof(*res) + privsz;
+ memcpy(res->pub.beacon_ies, mgmt->u.beacon.variable, ielen);
+ res->pub.len_beacon_ies = ielen;
+ res->pub.information_elements = res->pub.beacon_ies;
+ res->pub.len_information_elements = res->pub.len_beacon_ies;
+ }
+
+ kref_init(&res->ref);
+
+ res = cfg80211_bss_update(wiphy_to_dev(wiphy), res);
+ if (!res)
+ return NULL;
+
+ if (res->pub.capability & WLAN_CAPABILITY_ESS)
+ regulatory_hint_found_beacon(wiphy, channel, gfp);
+
+ /* cfg80211_bss_update gives us a referenced result */
+ return &res->pub;
+}
+EXPORT_SYMBOL(cfg80211_inform_bss_frame);
+
+void cfg80211_ref_bss(struct cfg80211_bss *pub)
+{
+ struct cfg80211_internal_bss *bss;
+
+ if (!pub)
+ return;
+
+ bss = container_of(pub, struct cfg80211_internal_bss, pub);
+ kref_get(&bss->ref);
+}
+EXPORT_SYMBOL(cfg80211_ref_bss);
+
+void cfg80211_put_bss(struct cfg80211_bss *pub)
+{
+ struct cfg80211_internal_bss *bss;
+
+ if (!pub)
+ return;
+
+ bss = container_of(pub, struct cfg80211_internal_bss, pub);
+ kref_put(&bss->ref, bss_release);
+}
+EXPORT_SYMBOL(cfg80211_put_bss);
+
+void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)
+{
+ struct cfg80211_registered_device *dev = wiphy_to_dev(wiphy);
+ struct cfg80211_internal_bss *bss;
+
+ if (WARN_ON(!pub))
+ return;
+
+ bss = container_of(pub, struct cfg80211_internal_bss, pub);
+
+ spin_lock_bh(&dev->bss_lock);
+ if (!list_empty(&bss->list)) {
+ __cfg80211_unlink_bss(dev, bss);
+ dev->bss_generation++;
+ }
+ spin_unlock_bh(&dev->bss_lock);
+}
+EXPORT_SYMBOL(cfg80211_unlink_bss);
+
+#ifdef CONFIG_CFG80211_WEXT
+int cfg80211_wext_siwscan(struct net_device *dev,
+ struct iw_request_info *info,
+ union iwreq_data *wrqu, char *extra)
+{
+ struct cfg80211_registered_device *rdev;
+ struct wiphy *wiphy;
+ struct iw_scan_req *wreq = NULL;
+ struct cfg80211_scan_request *creq = NULL;
+ int i, err, n_channels = 0;
+ enum ieee80211_band band;
+
+ if (!netif_running(dev))
+ return -ENETDOWN;
+
+ if (wrqu->data.length == sizeof(struct iw_scan_req))
+ wreq = (struct iw_scan_req *)extra;
+
+ rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex);
+
+ if (IS_ERR(rdev))
+ return PTR_ERR(rdev);
+
+ if (rdev->scan_req) {
+ err = -EBUSY;
+ goto out;
+ }
+
+ wiphy = &rdev->wiphy;
+
+ /* Determine number of channels, needed to allocate creq */
+ if (wreq && wreq->num_channels)
+ n_channels = wreq->num_channels;
+ else {
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++)
+ if (wiphy->bands[band])
+ n_channels += wiphy->bands[band]->n_channels;
+ }
+
+ creq = kzalloc(sizeof(*creq) + sizeof(struct cfg80211_ssid) +
+ n_channels * sizeof(void *),
+ GFP_ATOMIC);
+ if (!creq) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ creq->wiphy = wiphy;
+ creq->dev = dev;
+ /* SSIDs come after channels */
+ creq->ssids = (void *)&creq->channels[n_channels];
+ creq->n_channels = n_channels;
+ creq->n_ssids = 1;
+
+ /* translate "Scan on frequencies" request */
+ i = 0;
+ for (band = 0; band < IEEE80211_NUM_BANDS; band++) {
+ int j;
+
+ if (!wiphy->bands[band])
+ continue;
+
+ for (j = 0; j < wiphy->bands[band]->n_channels; j++) {
+ /* ignore disabled channels */
+ if (wiphy->bands[band]->channels[j].flags &
+ IEEE80211_CHAN_DISABLED)
+ continue;
+
+ /* If we have a wireless request structure and the
+ * wireless request specifies frequencies, then search
+ * for the matching hardware channel.
+ */
+ if (wreq && wreq->num_channels) {
+ int k;
+ int wiphy_freq = wiphy->bands[band]->channels[j].center_freq;
+ for (k = 0; k < wreq->num_channels; k++) {
+ int wext_freq = cfg80211_wext_freq(wiphy, &wreq->channel_list[k]);
+ if (wext_freq == wiphy_freq)
+ goto wext_freq_found;
+ }
+ goto wext_freq_not_found;
+ }
+
+ wext_freq_found:
+ creq->channels[i] = &wiphy->bands[band]->channels[j];
+ i++;
+ wext_freq_not_found: ;
+ }
+ }
+ /* No channels found? */
+ if (!i) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Set real number of channels specified in creq->channels[] */
+ creq->n_channels = i;
+
+ /* translate "Scan for SSID" request */
+ if (wreq) {
+ if (wrqu->data.flags & IW_SCAN_THIS_ESSID) {
+ if (wreq->essid_len > IEEE80211_MAX_SSID_LEN) {
+ err = -EINVAL;
+ goto out;
+ }
+ memcpy(creq->ssids[0].ssid, wreq->essid, wreq->essid_len);
+ creq->ssids[0].ssid_len = wreq->essid_len;
+ }
+ if (wreq->scan_type == IW_SCAN_TYPE_PASSIVE)
+ creq->n_ssids = 0;
+ }
+
+ for (i = 0; i < IEEE80211_NUM_BANDS; i++)
+ if (wiphy->bands[i])
+ creq->rates[i] = (1 << wiphy->bands[i]->n_bitrates) - 1;
+
+ rdev->scan_req = creq;
+ err = rdev->ops->scan(wiphy, dev, creq);
+ if (err) {
+ rdev->scan_req = NULL;
+ /* creq will be freed below */
+ } else {
+ nl80211_send_scan_start(rdev, dev);
+ /* creq now owned by driver */
+ creq = NULL;
+ dev_hold(dev);
+ }
+ out:
+ kfree(creq);
+ cfg80211_unlock_rdev(rdev);
+ return err;
+}
+EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan);
+
+static void ieee80211_scan_add_ies(struct iw_request_info *info,
+ struct cfg80211_bss *bss,
+ char **current_ev, char *end_buf)
+{
+ u8 *pos, *end, *next;
+ struct iw_event iwe;
+
+ if (!bss->information_elements ||
+ !bss->len_information_elements)
+ return;
+
+ /*
+ * If needed, fragment the IEs buffer (at IE boundaries) into short
+ * enough fragments to fit into IW_GENERIC_IE_MAX octet messages.
+ */
+ pos = bss->information_elements;
+ end = pos + bss->len_information_elements;
+
+ while (end - pos > IW_GENERIC_IE_MAX) {
+ next = pos + 2 + pos[1];
+ while (next + 2 + next[1] - pos < IW_GENERIC_IE_MAX)
+ next = next + 2 + next[1];
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = next - pos;
+ *current_ev = iwe_stream_add_point(info, *current_ev,
+ end_buf, &iwe, pos);
+
+ pos = next;
+ }
+
+ if (end > pos) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVGENIE;
+ iwe.u.data.length = end - pos;
+ *current_ev = iwe_stream_add_point(info, *current_ev,
+ end_buf, &iwe, pos);
+ }
+}
+
+static inline unsigned int elapsed_jiffies_msecs(unsigned long start)
+{
+ unsigned long end = jiffies;
+
+ if (end >= start)
+ return jiffies_to_msecs(end - start);
+
+ return jiffies_to_msecs(end + (MAX_JIFFY_OFFSET - start) + 1);
+}
+
+static char *
+ieee80211_bss(struct wiphy *wiphy, struct iw_request_info *info,
+ struct cfg80211_internal_bss *bss, char *current_ev,
+ char *end_buf)
+{
+ struct iw_event iwe;
+ u8 *buf, *cfg, *p;
+ u8 *ie = bss->pub.information_elements;
+ int rem = bss->pub.len_information_elements, i, sig;
+ bool ismesh = false;
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWAP;
+ iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
+ memcpy(iwe.u.ap_addr.sa_data, bss->pub.bssid, ETH_ALEN);
+ current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
+ IW_EV_ADDR_LEN);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWFREQ;
+ iwe.u.freq.m = ieee80211_frequency_to_channel(bss->pub.channel->center_freq);
+ iwe.u.freq.e = 0;
+ current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
+ IW_EV_FREQ_LEN);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWFREQ;
+ iwe.u.freq.m = bss->pub.channel->center_freq;
+ iwe.u.freq.e = 6;
+ current_ev = iwe_stream_add_event(info, current_ev, end_buf, &iwe,
+ IW_EV_FREQ_LEN);
+
+ if (wiphy->signal_type != CFG80211_SIGNAL_TYPE_NONE) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVQUAL;
+ iwe.u.qual.updated = IW_QUAL_LEVEL_UPDATED |
+ IW_QUAL_NOISE_INVALID |
+ IW_QUAL_QUAL_UPDATED;
+ switch (wiphy->signal_type) {
+ case CFG80211_SIGNAL_TYPE_MBM:
+ sig = bss->pub.signal / 100;
+ iwe.u.qual.level = sig;
+ iwe.u.qual.updated |= IW_QUAL_DBM;
+ if (sig < -110) /* rather bad */
+ sig = -110;
+ else if (sig > -40) /* perfect */
+ sig = -40;
+ /* will give a range of 0 .. 70 */
+ iwe.u.qual.qual = sig + 110;
+ break;
+ case CFG80211_SIGNAL_TYPE_UNSPEC:
+ iwe.u.qual.level = bss->pub.signal;
+ /* will give range 0 .. 100 */
+ iwe.u.qual.qual = bss->pub.signal;
+ break;
+ default:
+ /* not reached */
+ break;
+ }
+ current_ev = iwe_stream_add_event(info, current_ev, end_buf,
+ &iwe, IW_EV_QUAL_LEN);
+ }
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWENCODE;
+ if (bss->pub.capability & WLAN_CAPABILITY_PRIVACY)
+ iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
+ else
+ iwe.u.data.flags = IW_ENCODE_DISABLED;
+ iwe.u.data.length = 0;
+ current_ev = iwe_stream_add_point(info, current_ev, end_buf,
+ &iwe, "");
+
+ while (rem >= 2) {
+ /* invalid data */
+ if (ie[1] > rem - 2)
+ break;
+
+ switch (ie[0]) {
+ case WLAN_EID_SSID:
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWESSID;
+ iwe.u.data.length = ie[1];
+ iwe.u.data.flags = 1;
+ current_ev = iwe_stream_add_point(info, current_ev, end_buf,
+ &iwe, ie + 2);
+ break;
+ case WLAN_EID_MESH_ID:
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWESSID;
+ iwe.u.data.length = ie[1];
+ iwe.u.data.flags = 1;
+ current_ev = iwe_stream_add_point(info, current_ev, end_buf,
+ &iwe, ie + 2);
+ break;
+ case WLAN_EID_MESH_CONFIG:
+ ismesh = true;
+ if (ie[1] != sizeof(struct ieee80211_meshconf_ie))
+ break;
+ buf = kmalloc(50, GFP_ATOMIC);
+ if (!buf)
+ break;
+ cfg = ie + 2;
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "Mesh Network Path Selection Protocol ID: "
+ "0x%02X", cfg[0]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Path Selection Metric ID: 0x%02X",
+ cfg[1]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Congestion Control Mode ID: 0x%02X",
+ cfg[2]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Synchronization ID: 0x%02X", cfg[3]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Authentication ID: 0x%02X", cfg[4]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Formation Info: 0x%02X", cfg[5]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ sprintf(buf, "Capabilities: 0x%02X", cfg[6]);
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf,
+ &iwe, buf);
+ kfree(buf);
+ break;
+ case WLAN_EID_SUPP_RATES:
+ case WLAN_EID_EXT_SUPP_RATES:
+ /* display all supported rates in readable format */
+ p = current_ev + iwe_stream_lcp_len(info);
+
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWRATE;
+ /* Those two flags are ignored... */
+ iwe.u.bitrate.fixed = iwe.u.bitrate.disabled = 0;
+
+ for (i = 0; i < ie[1]; i++) {
+ iwe.u.bitrate.value =
+ ((ie[i + 2] & 0x7f) * 500000);
+ p = iwe_stream_add_value(info, current_ev, p,
+ end_buf, &iwe, IW_EV_PARAM_LEN);
+ }
+ current_ev = p;
+ break;
+ }
+ rem -= ie[1] + 2;
+ ie += ie[1] + 2;
+ }
+
+ if (bss->pub.capability & (WLAN_CAPABILITY_ESS | WLAN_CAPABILITY_IBSS) ||
+ ismesh) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = SIOCGIWMODE;
+ if (ismesh)
+ iwe.u.mode = IW_MODE_MESH;
+ else if (bss->pub.capability & WLAN_CAPABILITY_ESS)
+ iwe.u.mode = IW_MODE_MASTER;
+ else
+ iwe.u.mode = IW_MODE_ADHOC;
+ current_ev = iwe_stream_add_event(info, current_ev, end_buf,
+ &iwe, IW_EV_UINT_LEN);
+ }
+
+ buf = kmalloc(30, GFP_ATOMIC);
+ if (buf) {
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, "tsf=%016llx", (unsigned long long)(bss->pub.tsf));
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev, end_buf,
+ &iwe, buf);
+ memset(&iwe, 0, sizeof(iwe));
+ iwe.cmd = IWEVCUSTOM;
+ sprintf(buf, " Last beacon: %ums ago",
+ elapsed_jiffies_msecs(bss->ts));
+ iwe.u.data.length = strlen(buf);
+ current_ev = iwe_stream_add_point(info, current_ev,
+ end_buf, &iwe, buf);
+ kfree(buf);
+ }
+
+ ieee80211_scan_add_ies(info, &bss->pub, ¤t_ev, end_buf);
+
+ return current_ev;
+}
+
+
+static int ieee80211_scan_results(struct cfg80211_registered_device *dev,
+ struct iw_request_info *info,
+ char *buf, size_t len)
+{
+ char *current_ev = buf;
+ char *end_buf = buf + len;
+ struct cfg80211_internal_bss *bss;
+
+ spin_lock_bh(&dev->bss_lock);
+ cfg80211_bss_expire(dev);
+
+ list_for_each_entry(bss, &dev->bss_list, list) {
+ if (buf + len - current_ev <= IW_EV_ADDR_LEN) {
+ spin_unlock_bh(&dev->bss_lock);
+ return -E2BIG;
+ }
+ current_ev = ieee80211_bss(&dev->wiphy, info, bss,
+ current_ev, end_buf);
+ }
+ spin_unlock_bh(&dev->bss_lock);
+ return current_ev - buf;
+}
+
+
+int cfg80211_wext_giwscan(struct net_device *dev,
+ struct iw_request_info *info,
+ struct iw_point *data, char *extra)
+{
+ struct cfg80211_registered_device *rdev;
+ int res;
+
+ if (!netif_running(dev))
+ return -ENETDOWN;
+
+ rdev = cfg80211_get_dev_from_ifindex(dev_net(dev), dev->ifindex);
+
+ if (IS_ERR(rdev))
+ return PTR_ERR(rdev);
+
+ if (rdev->scan_req) {
+ res = -EAGAIN;
+ goto out;
+ }
+
+ res = ieee80211_scan_results(rdev, info, extra, data->length);
+ data->length = 0;
+ if (res >= 0) {
+ data->length = res;
+ res = 0;
+ }
+
+ out:
+ cfg80211_unlock_rdev(rdev);
+ return res;
+}
+EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan);
+#endif