Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 1377 insertions, 0 deletions

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
new file mode 100644
index 00000000..a4ec291d
--- /dev/null
+++ b/net/wireless/scan.c
@@ -0,0 +1,1377 @@
+/*
+ * 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;
+}
+
+
+static u64 rtw_get_systime_us(void)
+{
+#if 1 //LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)
+	struct timespec ts;
+	get_monotonic_boottime(&ts);
+	return ((u64)ts.tv_sec*1000000) + ts.tv_nsec / 1000;
+#else
+	struct timeval tv;
+	do_gettimeofday(&tv);
+	return ((u64)tv.tv_sec*1000000) + tv.tv_usec;
+#endif
+}
+
+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;
+#if 0	
+	res->pub.tsf = tsf;
+#else
+	res->pub.tsf = rtw_get_systime_us();
+
+#endif	
+	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;
+#if 0	
+	res->pub.tsf = le64_to_cpu(mgmt->u.probe_resp.timestamp);
+#else
+	res->pub.tsf = rtw_get_systime_us();
+	
+#endif
+	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, &current_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