net/wireless/mlme.c - kernel/msm - Gitiles

 /*
  * cfg80211 MLME SAP interface
  *
  * Copyright (c) 2009, Jouni Malinen <j@w1.fi>
  */

 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/netdevice.h>
 #include <linux/nl80211.h>
 #include <linux/wireless.h>
 #include <net/cfg80211.h>
 #include <net/iw_handler.h>
 #include "core.h"
 #include "nl80211.h"

 void cfg80211_send_rx_auth(struct net_device *dev, const u8 *buf, size_t len)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 	u8 *bssid = mgmt->bssid;
 	int i;
 	u16 status = le16_to_cpu(mgmt->u.auth.status_code);
 	bool done = false;

 	wdev_lock(wdev);

 	for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (wdev->authtry_bsses[i] &&
 		    memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid,
 							ETH_ALEN) == 0) {
 			if (status == WLAN_STATUS_SUCCESS) {
 				wdev->auth_bsses[i] = wdev->authtry_bsses[i];
 			} else {
 				cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 				cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 			}
 			wdev->authtry_bsses[i] = NULL;
 			done = true;
 			break;
 		}
 	}

 	WARN_ON(!done);

 	nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
 	cfg80211_sme_rx_auth(dev, buf, len);

 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_rx_auth);

 void cfg80211_send_rx_assoc(struct net_device *dev, const u8 *buf, size_t len)
 {
 	u16 status_code;
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 	u8 *ie = mgmt->u.assoc_resp.variable;
 	int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
 	struct cfg80211_internal_bss *bss = NULL;
 	bool need_connect_result = true;

 	wdev_lock(wdev);

 	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);

 	/*
 	 * This is a bit of a hack, we don't notify userspace of
 	 * a (re-)association reply if we tried to send a reassoc
 	 * and got a reject -- we only try again with an assoc
 	 * frame instead of reassoc.
 	 */
 	if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
 	    cfg80211_sme_failed_reassoc(wdev))
 		goto out;

 	nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);

 	if (status_code == WLAN_STATUS_SUCCESS) {
 		for (i = 0; i < MAX_AUTH_BSSES; i++) {
 			if (!wdev->auth_bsses[i])
 				continue;
 			if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid,
 				   ETH_ALEN) == 0) {
 				bss = wdev->auth_bsses[i];
 				wdev->auth_bsses[i] = NULL;
 				/* additional reference to drop hold */
 				cfg80211_ref_bss(bss);
 				break;
 			}
 		}

 		WARN_ON(!bss);
 	} else if (wdev->conn) {
 		cfg80211_sme_failed_assoc(wdev);
 		need_connect_result = false;
 		/*
 		 * do not call connect_result() now because the
 		 * sme will schedule work that does it later.
 		 */
 		goto out;
 	}

 	if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
 		/*
 		 * This is for the userspace SME, the CONNECTING
 		 * state will be changed to CONNECTED by
 		 * __cfg80211_connect_result() below.
 		 */
 		wdev->sme_state = CFG80211_SME_CONNECTING;
 	}

 	/* this consumes one bss reference (unless bss is NULL) */
 	__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
 				  status_code,
 				  status_code == WLAN_STATUS_SUCCESS,
 				  bss ? &bss->pub : NULL);
 	/* drop hold now, and also reference acquired above */
 	if (bss) {
 		cfg80211_unhold_bss(bss);
 		cfg80211_put_bss(&bss->pub);
 	}

  out:
 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_rx_assoc);

 void __cfg80211_send_deauth(struct net_device *dev,
 				   const u8 *buf, size_t len)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 	const u8 *bssid = mgmt->bssid;
 	int i;

 	ASSERT_WDEV_LOCK(wdev);

 	nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);

 	if (wdev->current_bss &&
 	    memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 		cfg80211_unhold_bss(wdev->current_bss);
 		cfg80211_put_bss(&wdev->current_bss->pub);
 		wdev->current_bss = NULL;
 	} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (wdev->auth_bsses[i] &&
 		    memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
 			cfg80211_unhold_bss(wdev->auth_bsses[i]);
 			cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 			wdev->auth_bsses[i] = NULL;
 			break;
 		}
 		if (wdev->authtry_bsses[i] &&
 		    memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
 			cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 			cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 			wdev->authtry_bsses[i] = NULL;
 			break;
 		}
 	}

 	if (wdev->sme_state == CFG80211_SME_CONNECTED) {
 		u16 reason_code;
 		bool from_ap;

 		reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);

 		from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
 		__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 	} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
 		__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
 					  WLAN_STATUS_UNSPECIFIED_FAILURE,
 					  false, NULL);
 	}
 }
 EXPORT_SYMBOL(__cfg80211_send_deauth);

 void cfg80211_send_deauth(struct net_device *dev, const u8 *buf, size_t len)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;

 	wdev_lock(wdev);
 	__cfg80211_send_deauth(dev, buf, len);
 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_deauth);

 void __cfg80211_send_disassoc(struct net_device *dev,
 				     const u8 *buf, size_t len)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)buf;
 	const u8 *bssid = mgmt->bssid;
 	int i;
 	u16 reason_code;
 	bool from_ap;
 	bool done = false;

 	ASSERT_WDEV_LOCK(wdev);

 	nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);

 	if (wdev->sme_state != CFG80211_SME_CONNECTED)
 		return;

 	if (wdev->current_bss &&
 	    memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 		for (i = 0; i < MAX_AUTH_BSSES; i++) {
 			if (wdev->authtry_bsses[i] || wdev->auth_bsses[i])
 				continue;
 			wdev->auth_bsses[i] = wdev->current_bss;
 			wdev->current_bss = NULL;
 			done = true;
 			cfg80211_sme_disassoc(dev, i);
 			break;
 		}
 		WARN_ON(!done);
 	} else
 		WARN_ON(1);


 	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);

 	from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
 	__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
 }
 EXPORT_SYMBOL(__cfg80211_send_disassoc);

 void cfg80211_send_disassoc(struct net_device *dev, const u8 *buf, size_t len)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;

 	wdev_lock(wdev);
 	__cfg80211_send_disassoc(dev, buf, len);
 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_disassoc);

 void cfg80211_send_auth_timeout(struct net_device *dev, const u8 *addr)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	int i;
 	bool done = false;

 	wdev_lock(wdev);

 	nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
 	if (wdev->sme_state == CFG80211_SME_CONNECTING)
 		__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 					  WLAN_STATUS_UNSPECIFIED_FAILURE,
 					  false, NULL);

 	for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
 		if (wdev->authtry_bsses[i] &&
 		    memcmp(wdev->authtry_bsses[i]->pub.bssid,
 			   addr, ETH_ALEN) == 0) {
 			cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 			cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 			wdev->authtry_bsses[i] = NULL;
 			done = true;
 			break;
 		}
 	}

 	WARN_ON(!done);

 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_auth_timeout);

 void cfg80211_send_assoc_timeout(struct net_device *dev, const u8 *addr)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct wiphy *wiphy = wdev->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 	int i;
 	bool done = false;

 	wdev_lock(wdev);

 	nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
 	if (wdev->sme_state == CFG80211_SME_CONNECTING)
 		__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
 					  WLAN_STATUS_UNSPECIFIED_FAILURE,
 					  false, NULL);

 	for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
 		if (wdev->auth_bsses[i] &&
 		    memcmp(wdev->auth_bsses[i]->pub.bssid,
 			   addr, ETH_ALEN) == 0) {
 			cfg80211_unhold_bss(wdev->auth_bsses[i]);
 			cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 			wdev->auth_bsses[i] = NULL;
 			done = true;
 			break;
 		}
 	}

 	WARN_ON(!done);

 	wdev_unlock(wdev);
 }
 EXPORT_SYMBOL(cfg80211_send_assoc_timeout);

 void cfg80211_michael_mic_failure(struct net_device *dev, const u8 *addr,
 				  enum nl80211_key_type key_type, int key_id,
 				  const u8 *tsc, gfp_t gfp)
 {
 	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
 	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
 #ifdef CONFIG_CFG80211_WEXT
 	union iwreq_data wrqu;
 	char *buf = kmalloc(128, gfp);

 	if (buf) {
 		sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
 			"keyid=%d %scast addr=%pM)", key_id,
 			key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
 			addr);
 		memset(&wrqu, 0, sizeof(wrqu));
 		wrqu.data.length = strlen(buf);
 		wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
 		kfree(buf);
 	}
 #endif

 	nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
 }
 EXPORT_SYMBOL(cfg80211_michael_mic_failure);

 /* some MLME handling for userspace SME */
 int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev,
 			 struct ieee80211_channel *chan,
 			 enum nl80211_auth_type auth_type,
 			 const u8 *bssid,
 			 const u8 *ssid, int ssid_len,
 			 const u8 *ie, int ie_len,
 			 const u8 *key, int key_len, int key_idx)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_auth_request req;
 	struct cfg80211_internal_bss *bss;
 	int i, err, slot = -1, nfree = 0;

 	ASSERT_WDEV_LOCK(wdev);

 	if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
 		if (!key || !key_len || key_idx < 0 || key_idx > 4)
 			return -EINVAL;

 	if (wdev->current_bss &&
 	    memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0)
 		return -EALREADY;

 	for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (wdev->authtry_bsses[i] &&
 		    memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid,
 						ETH_ALEN) == 0)
 			return -EALREADY;
 		if (wdev->auth_bsses[i] &&
 		    memcmp(bssid, wdev->auth_bsses[i]->pub.bssid,
 						ETH_ALEN) == 0)
 			return -EALREADY;
 	}

 	memset(&req, 0, sizeof(req));

 	req.ie = ie;
 	req.ie_len = ie_len;
 	req.auth_type = auth_type;
 	req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 				   WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 	req.key = key;
 	req.key_len = key_len;
 	req.key_idx = key_idx;
 	if (!req.bss)
 		return -ENOENT;

 	bss = bss_from_pub(req.bss);

 	for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) {
 			slot = i;
 			nfree++;
 		}
 	}

 	/* we need one free slot for disassoc and one for this auth */
 	if (nfree < 2) {
 		err = -ENOSPC;
 		goto out;
 	}

 	wdev->authtry_bsses[slot] = bss;
 	cfg80211_hold_bss(bss);

 	err = rdev->ops->auth(&rdev->wiphy, dev, &req);
 	if (err) {
 		wdev->authtry_bsses[slot] = NULL;
 		cfg80211_unhold_bss(bss);
 	}

  out:
 	if (err)
 		cfg80211_put_bss(req.bss);
 	return err;
 }

 int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
 		       struct net_device *dev, struct ieee80211_channel *chan,
 		       enum nl80211_auth_type auth_type, const u8 *bssid,
 		       const u8 *ssid, int ssid_len,
 		       const u8 *ie, int ie_len,
 		       const u8 *key, int key_len, int key_idx)
 {
 	int err;

 	wdev_lock(dev->ieee80211_ptr);
 	err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
 				   ssid, ssid_len, ie, ie_len,
 				   key, key_len, key_idx);
 	wdev_unlock(dev->ieee80211_ptr);

 	return err;
 }

 int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 			  struct net_device *dev,
 			  struct ieee80211_channel *chan,
 			  const u8 *bssid, const u8 *prev_bssid,
 			  const u8 *ssid, int ssid_len,
 			  const u8 *ie, int ie_len, bool use_mfp,
 			  struct cfg80211_crypto_settings *crypt)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_assoc_request req;
 	struct cfg80211_internal_bss *bss;
 	int i, err, slot = -1;

 	ASSERT_WDEV_LOCK(wdev);

 	memset(&req, 0, sizeof(req));

 	if (wdev->current_bss)
 		return -EALREADY;

 	req.ie = ie;
 	req.ie_len = ie_len;
 	memcpy(&req.crypto, crypt, sizeof(req.crypto));
 	req.use_mfp = use_mfp;
 	req.prev_bssid = prev_bssid;
 	req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
 				   WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
 	if (!req.bss)
 		return -ENOENT;

 	bss = bss_from_pub(req.bss);

 	for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (bss == wdev->auth_bsses[i]) {
 			slot = i;
 			break;
 		}
 	}

 	if (slot < 0) {
 		err = -ENOTCONN;
 		goto out;
 	}

 	err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
  out:
 	/* still a reference in wdev->auth_bsses[slot] */
 	cfg80211_put_bss(req.bss);
 	return err;
 }

 int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
 			struct net_device *dev,
 			struct ieee80211_channel *chan,
 			const u8 *bssid, const u8 *prev_bssid,
 			const u8 *ssid, int ssid_len,
 			const u8 *ie, int ie_len, bool use_mfp,
 			struct cfg80211_crypto_settings *crypt)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	wdev_lock(wdev);
 	err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
 				    ssid, ssid_len, ie, ie_len, use_mfp, crypt);
 	wdev_unlock(wdev);

 	return err;
 }

 int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 			   struct net_device *dev, const u8 *bssid,
 			   const u8 *ie, int ie_len, u16 reason)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_deauth_request req;
 	int i;

 	ASSERT_WDEV_LOCK(wdev);

 	memset(&req, 0, sizeof(req));
 	req.reason_code = reason;
 	req.ie = ie;
 	req.ie_len = ie_len;
 	if (wdev->current_bss &&
 	    memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
 		req.bss = &wdev->current_bss->pub;
 	} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (wdev->auth_bsses[i] &&
 		    memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 			req.bss = &wdev->auth_bsses[i]->pub;
 			break;
 		}
 		if (wdev->authtry_bsses[i] &&
 		    memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
 			req.bss = &wdev->authtry_bsses[i]->pub;
 			break;
 		}
 	}

 	if (!req.bss)
 		return -ENOTCONN;

 	return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 }

 int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
 			 struct net_device *dev, const u8 *bssid,
 			 const u8 *ie, int ie_len, u16 reason)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	wdev_lock(wdev);
 	err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason);
 	wdev_unlock(wdev);

 	return err;
 }

 static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 				    struct net_device *dev, const u8 *bssid,
 				    const u8 *ie, int ie_len, u16 reason)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_disassoc_request req;

 	ASSERT_WDEV_LOCK(wdev);

 	if (wdev->sme_state != CFG80211_SME_CONNECTED)
 		return -ENOTCONN;

 	if (WARN_ON(!wdev->current_bss))
 		return -ENOTCONN;

 	memset(&req, 0, sizeof(req));
 	req.reason_code = reason;
 	req.ie = ie;
 	req.ie_len = ie_len;
 	if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0)
 		req.bss = &wdev->current_bss->pub;
 	else
 		return -ENOTCONN;

 	return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev);
 }

 int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
 			   struct net_device *dev, const u8 *bssid,
 			   const u8 *ie, int ie_len, u16 reason)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	int err;

 	wdev_lock(wdev);
 	err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason);
 	wdev_unlock(wdev);

 	return err;
 }

 void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
 			struct net_device *dev)
 {
 	struct wireless_dev *wdev = dev->ieee80211_ptr;
 	struct cfg80211_deauth_request req;
 	int i;

 	ASSERT_WDEV_LOCK(wdev);

 	if (!rdev->ops->deauth)
 		return;

 	memset(&req, 0, sizeof(req));
 	req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
 	req.ie = NULL;
 	req.ie_len = 0;

 	if (wdev->current_bss) {
 		req.bss = &wdev->current_bss->pub;
 		rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 		if (wdev->current_bss) {
 			cfg80211_unhold_bss(wdev->current_bss);
 			cfg80211_put_bss(&wdev->current_bss->pub);
 			wdev->current_bss = NULL;
 		}
 	}

 	for (i = 0; i < MAX_AUTH_BSSES; i++) {
 		if (wdev->auth_bsses[i]) {
 			req.bss = &wdev->auth_bsses[i]->pub;
 			rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 			if (wdev->auth_bsses[i]) {
 				cfg80211_unhold_bss(wdev->auth_bsses[i]);
 				cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
 				wdev->auth_bsses[i] = NULL;
 			}
 		}
 		if (wdev->authtry_bsses[i]) {
 			req.bss = &wdev->authtry_bsses[i]->pub;
 			rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
 			if (wdev->authtry_bsses[i]) {
 				cfg80211_unhold_bss(wdev->authtry_bsses[i]);
 				cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
 				wdev->authtry_bsses[i] = NULL;
 			}
 		}
 	}
 }
	/*
	* cfg80211 MLME SAP interface
	*
	* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
	*/

	#include <linux/kernel.h>
	#include <linux/module.h>
	#include <linux/netdevice.h>
	#include <linux/nl80211.h>
	#include <linux/wireless.h>
	#include <net/cfg80211.h>
	#include <net/iw_handler.h>
	#include "core.h"
	#include "nl80211.h"

	void cfg80211_send_rx_auth(struct net_device dev, const u8 buf, size_t len)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct ieee80211_mgmt mgmt = (struct ieee80211_mgmt )buf;
	u8 *bssid = mgmt->bssid;
	int i;
	u16 status = le16_to_cpu(mgmt->u.auth.status_code);
	bool done = false;

	wdev_lock(wdev);

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->authtry_bsses[i] &&
	memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid,
	ETH_ALEN) == 0) {
	if (status == WLAN_STATUS_SUCCESS) {
	wdev->auth_bsses[i] = wdev->authtry_bsses[i];
	} else {
	cfg80211_unhold_bss(wdev->authtry_bsses[i]);
	cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
	}
	wdev->authtry_bsses[i] = NULL;
	done = true;
	break;
	}
	}

	WARN_ON(!done);

	nl80211_send_rx_auth(rdev, dev, buf, len, GFP_KERNEL);
	cfg80211_sme_rx_auth(dev, buf, len);

	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_rx_auth);

	void cfg80211_send_rx_assoc(struct net_device dev, const u8 buf, size_t len)
	{
	u16 status_code;
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct ieee80211_mgmt mgmt = (struct ieee80211_mgmt )buf;
	u8 *ie = mgmt->u.assoc_resp.variable;
	int i, ieoffs = offsetof(struct ieee80211_mgmt, u.assoc_resp.variable);
	struct cfg80211_internal_bss *bss = NULL;
	bool need_connect_result = true;

	wdev_lock(wdev);

	status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);

	/*
	* This is a bit of a hack, we don't notify userspace of
	* a (re-)association reply if we tried to send a reassoc
	* and got a reject -- we only try again with an assoc
	* frame instead of reassoc.
	*/
	if (status_code != WLAN_STATUS_SUCCESS && wdev->conn &&
	cfg80211_sme_failed_reassoc(wdev))
	goto out;

	nl80211_send_rx_assoc(rdev, dev, buf, len, GFP_KERNEL);

	if (status_code == WLAN_STATUS_SUCCESS) {
	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (!wdev->auth_bsses[i])
	continue;
	if (memcmp(wdev->auth_bsses[i]->pub.bssid, mgmt->bssid,
	ETH_ALEN) == 0) {
	bss = wdev->auth_bsses[i];
	wdev->auth_bsses[i] = NULL;
	/* additional reference to drop hold */
	cfg80211_ref_bss(bss);
	break;
	}
	}

	WARN_ON(!bss);
	} else if (wdev->conn) {
	cfg80211_sme_failed_assoc(wdev);
	need_connect_result = false;
	/*
	* do not call connect_result() now because the
	* sme will schedule work that does it later.
	*/
	goto out;
	}

	if (!wdev->conn && wdev->sme_state == CFG80211_SME_IDLE) {
	/*
	* This is for the userspace SME, the CONNECTING
	* state will be changed to CONNECTED by
	* __cfg80211_connect_result() below.
	*/
	wdev->sme_state = CFG80211_SME_CONNECTING;
	}

	/* this consumes one bss reference (unless bss is NULL) */
	__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, ie, len - ieoffs,
	status_code,
	status_code == WLAN_STATUS_SUCCESS,
	bss ? &bss->pub : NULL);
	/* drop hold now, and also reference acquired above */
	if (bss) {
	cfg80211_unhold_bss(bss);
	cfg80211_put_bss(&bss->pub);
	}

	out:
	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_rx_assoc);

	void __cfg80211_send_deauth(struct net_device *dev,
	const u8 *buf, size_t len)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct ieee80211_mgmt mgmt = (struct ieee80211_mgmt )buf;
	const u8 *bssid = mgmt->bssid;
	int i;

	ASSERT_WDEV_LOCK(wdev);

	nl80211_send_deauth(rdev, dev, buf, len, GFP_KERNEL);

	if (wdev->current_bss &&
	memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
	cfg80211_unhold_bss(wdev->current_bss);
	cfg80211_put_bss(&wdev->current_bss->pub);
	wdev->current_bss = NULL;
	} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->auth_bsses[i] &&
	memcmp(wdev->auth_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
	cfg80211_unhold_bss(wdev->auth_bsses[i]);
	cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
	wdev->auth_bsses[i] = NULL;
	break;
	}
	if (wdev->authtry_bsses[i] &&
	memcmp(wdev->authtry_bsses[i]->pub.bssid, bssid, ETH_ALEN) == 0) {
	cfg80211_unhold_bss(wdev->authtry_bsses[i]);
	cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
	wdev->authtry_bsses[i] = NULL;
	break;
	}
	}

	if (wdev->sme_state == CFG80211_SME_CONNECTED) {
	u16 reason_code;
	bool from_ap;

	reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);

	from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
	__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
	} else if (wdev->sme_state == CFG80211_SME_CONNECTING) {
	__cfg80211_connect_result(dev, mgmt->bssid, NULL, 0, NULL, 0,
	WLAN_STATUS_UNSPECIFIED_FAILURE,
	false, NULL);
	}
	}
	EXPORT_SYMBOL(__cfg80211_send_deauth);

	void cfg80211_send_deauth(struct net_device dev, const u8 buf, size_t len)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	wdev_lock(wdev);
	__cfg80211_send_deauth(dev, buf, len);
	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_deauth);

	void __cfg80211_send_disassoc(struct net_device *dev,
	const u8 *buf, size_t len)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	struct ieee80211_mgmt mgmt = (struct ieee80211_mgmt )buf;
	const u8 *bssid = mgmt->bssid;
	int i;
	u16 reason_code;
	bool from_ap;
	bool done = false;

	ASSERT_WDEV_LOCK(wdev);

	nl80211_send_disassoc(rdev, dev, buf, len, GFP_KERNEL);

	if (wdev->sme_state != CFG80211_SME_CONNECTED)
	return;

	if (wdev->current_bss &&
	memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->authtry_bsses[i] \|\| wdev->auth_bsses[i])
	continue;
	wdev->auth_bsses[i] = wdev->current_bss;
	wdev->current_bss = NULL;
	done = true;
	cfg80211_sme_disassoc(dev, i);
	break;
	}
	WARN_ON(!done);
	} else
	WARN_ON(1);


	reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);

	from_ap = memcmp(mgmt->sa, dev->dev_addr, ETH_ALEN) != 0;
	__cfg80211_disconnected(dev, NULL, 0, reason_code, from_ap);
	}
	EXPORT_SYMBOL(__cfg80211_send_disassoc);

	void cfg80211_send_disassoc(struct net_device dev, const u8 buf, size_t len)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;

	wdev_lock(wdev);
	__cfg80211_send_disassoc(dev, buf, len);
	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_disassoc);

	void cfg80211_send_auth_timeout(struct net_device dev, const u8 addr)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	int i;
	bool done = false;

	wdev_lock(wdev);

	nl80211_send_auth_timeout(rdev, dev, addr, GFP_KERNEL);
	if (wdev->sme_state == CFG80211_SME_CONNECTING)
	__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
	WLAN_STATUS_UNSPECIFIED_FAILURE,
	false, NULL);

	for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
	if (wdev->authtry_bsses[i] &&
	memcmp(wdev->authtry_bsses[i]->pub.bssid,
	addr, ETH_ALEN) == 0) {
	cfg80211_unhold_bss(wdev->authtry_bsses[i]);
	cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
	wdev->authtry_bsses[i] = NULL;
	done = true;
	break;
	}
	}

	WARN_ON(!done);

	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_auth_timeout);

	void cfg80211_send_assoc_timeout(struct net_device dev, const u8 addr)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct wiphy *wiphy = wdev->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	int i;
	bool done = false;

	wdev_lock(wdev);

	nl80211_send_assoc_timeout(rdev, dev, addr, GFP_KERNEL);
	if (wdev->sme_state == CFG80211_SME_CONNECTING)
	__cfg80211_connect_result(dev, addr, NULL, 0, NULL, 0,
	WLAN_STATUS_UNSPECIFIED_FAILURE,
	false, NULL);

	for (i = 0; addr && i < MAX_AUTH_BSSES; i++) {
	if (wdev->auth_bsses[i] &&
	memcmp(wdev->auth_bsses[i]->pub.bssid,
	addr, ETH_ALEN) == 0) {
	cfg80211_unhold_bss(wdev->auth_bsses[i]);
	cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
	wdev->auth_bsses[i] = NULL;
	done = true;
	break;
	}
	}

	WARN_ON(!done);

	wdev_unlock(wdev);
	}
	EXPORT_SYMBOL(cfg80211_send_assoc_timeout);

	void cfg80211_michael_mic_failure(struct net_device dev, const u8 addr,
	enum nl80211_key_type key_type, int key_id,
	const u8 *tsc, gfp_t gfp)
	{
	struct wiphy *wiphy = dev->ieee80211_ptr->wiphy;
	struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
	#ifdef CONFIG_CFG80211_WEXT
	union iwreq_data wrqu;
	char *buf = kmalloc(128, gfp);

	if (buf) {
	sprintf(buf, "MLME-MICHAELMICFAILURE.indication("
	"keyid=%d %scast addr=%pM)", key_id,
	key_type == NL80211_KEYTYPE_GROUP ? "broad" : "uni",
	addr);
	memset(&wrqu, 0, sizeof(wrqu));
	wrqu.data.length = strlen(buf);
	wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
	kfree(buf);
	}
	#endif

	nl80211_michael_mic_failure(rdev, dev, addr, key_type, key_id, tsc, gfp);
	}
	EXPORT_SYMBOL(cfg80211_michael_mic_failure);

	/* some MLME handling for userspace SME */
	int __cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct ieee80211_channel *chan,
	enum nl80211_auth_type auth_type,
	const u8 *bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len,
	const u8 *key, int key_len, int key_idx)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_auth_request req;
	struct cfg80211_internal_bss *bss;
	int i, err, slot = -1, nfree = 0;

	ASSERT_WDEV_LOCK(wdev);

	if (auth_type == NL80211_AUTHTYPE_SHARED_KEY)
	if (!key \|\| !key_len \|\| key_idx < 0 \|\| key_idx > 4)
	return -EINVAL;

	if (wdev->current_bss &&
	memcmp(bssid, wdev->current_bss->pub.bssid, ETH_ALEN) == 0)
	return -EALREADY;

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->authtry_bsses[i] &&
	memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid,
	ETH_ALEN) == 0)
	return -EALREADY;
	if (wdev->auth_bsses[i] &&
	memcmp(bssid, wdev->auth_bsses[i]->pub.bssid,
	ETH_ALEN) == 0)
	return -EALREADY;
	}

	memset(&req, 0, sizeof(req));

	req.ie = ie;
	req.ie_len = ie_len;
	req.auth_type = auth_type;
	req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
	WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
	req.key = key;
	req.key_len = key_len;
	req.key_idx = key_idx;
	if (!req.bss)
	return -ENOENT;

	bss = bss_from_pub(req.bss);

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (!wdev->auth_bsses[i] && !wdev->authtry_bsses[i]) {
	slot = i;
	nfree++;
	}
	}

	/* we need one free slot for disassoc and one for this auth */
	if (nfree < 2) {
	err = -ENOSPC;
	goto out;
	}

	wdev->authtry_bsses[slot] = bss;
	cfg80211_hold_bss(bss);

	err = rdev->ops->auth(&rdev->wiphy, dev, &req);
	if (err) {
	wdev->authtry_bsses[slot] = NULL;
	cfg80211_unhold_bss(bss);
	}

	out:
	if (err)
	cfg80211_put_bss(req.bss);
	return err;
	}

	int cfg80211_mlme_auth(struct cfg80211_registered_device *rdev,
	struct net_device dev, struct ieee80211_channel chan,
	enum nl80211_auth_type auth_type, const u8 *bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len,
	const u8 *key, int key_len, int key_idx)
	{
	int err;

	wdev_lock(dev->ieee80211_ptr);
	err = __cfg80211_mlme_auth(rdev, dev, chan, auth_type, bssid,
	ssid, ssid_len, ie, ie_len,
	key, key_len, key_idx);
	wdev_unlock(dev->ieee80211_ptr);

	return err;
	}

	int __cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct ieee80211_channel *chan,
	const u8 bssid, const u8 prev_bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len, bool use_mfp,
	struct cfg80211_crypto_settings *crypt)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_assoc_request req;
	struct cfg80211_internal_bss *bss;
	int i, err, slot = -1;

	ASSERT_WDEV_LOCK(wdev);

	memset(&req, 0, sizeof(req));

	if (wdev->current_bss)
	return -EALREADY;

	req.ie = ie;
	req.ie_len = ie_len;
	memcpy(&req.crypto, crypt, sizeof(req.crypto));
	req.use_mfp = use_mfp;
	req.prev_bssid = prev_bssid;
	req.bss = cfg80211_get_bss(&rdev->wiphy, chan, bssid, ssid, ssid_len,
	WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
	if (!req.bss)
	return -ENOENT;

	bss = bss_from_pub(req.bss);

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (bss == wdev->auth_bsses[i]) {
	slot = i;
	break;
	}
	}

	if (slot < 0) {
	err = -ENOTCONN;
	goto out;
	}

	err = rdev->ops->assoc(&rdev->wiphy, dev, &req);
	out:
	/* still a reference in wdev->auth_bsses[slot] */
	cfg80211_put_bss(req.bss);
	return err;
	}

	int cfg80211_mlme_assoc(struct cfg80211_registered_device *rdev,
	struct net_device *dev,
	struct ieee80211_channel *chan,
	const u8 bssid, const u8 prev_bssid,
	const u8 *ssid, int ssid_len,
	const u8 *ie, int ie_len, bool use_mfp,
	struct cfg80211_crypto_settings *crypt)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_mlme_assoc(rdev, dev, chan, bssid, prev_bssid,
	ssid, ssid_len, ie, ie_len, use_mfp, crypt);
	wdev_unlock(wdev);

	return err;
	}

	int __cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_deauth_request req;
	int i;

	ASSERT_WDEV_LOCK(wdev);

	memset(&req, 0, sizeof(req));
	req.reason_code = reason;
	req.ie = ie;
	req.ie_len = ie_len;
	if (wdev->current_bss &&
	memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0) {
	req.bss = &wdev->current_bss->pub;
	} else for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->auth_bsses[i] &&
	memcmp(bssid, wdev->auth_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
	req.bss = &wdev->auth_bsses[i]->pub;
	break;
	}
	if (wdev->authtry_bsses[i] &&
	memcmp(bssid, wdev->authtry_bsses[i]->pub.bssid, ETH_ALEN) == 0) {
	req.bss = &wdev->authtry_bsses[i]->pub;
	break;
	}
	}

	if (!req.bss)
	return -ENOTCONN;

	return rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
	}

	int cfg80211_mlme_deauth(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_mlme_deauth(rdev, dev, bssid, ie, ie_len, reason);
	wdev_unlock(wdev);

	return err;
	}

	static int __cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_disassoc_request req;

	ASSERT_WDEV_LOCK(wdev);

	if (wdev->sme_state != CFG80211_SME_CONNECTED)
	return -ENOTCONN;

	if (WARN_ON(!wdev->current_bss))
	return -ENOTCONN;

	memset(&req, 0, sizeof(req));
	req.reason_code = reason;
	req.ie = ie;
	req.ie_len = ie_len;
	if (memcmp(wdev->current_bss->pub.bssid, bssid, ETH_ALEN) == 0)
	req.bss = &wdev->current_bss->pub;
	else
	return -ENOTCONN;

	return rdev->ops->disassoc(&rdev->wiphy, dev, &req, wdev);
	}

	int cfg80211_mlme_disassoc(struct cfg80211_registered_device *rdev,
	struct net_device dev, const u8 bssid,
	const u8 *ie, int ie_len, u16 reason)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	int err;

	wdev_lock(wdev);
	err = __cfg80211_mlme_disassoc(rdev, dev, bssid, ie, ie_len, reason);
	wdev_unlock(wdev);

	return err;
	}

	void cfg80211_mlme_down(struct cfg80211_registered_device *rdev,
	struct net_device *dev)
	{
	struct wireless_dev *wdev = dev->ieee80211_ptr;
	struct cfg80211_deauth_request req;
	int i;

	ASSERT_WDEV_LOCK(wdev);

	if (!rdev->ops->deauth)
	return;

	memset(&req, 0, sizeof(req));
	req.reason_code = WLAN_REASON_DEAUTH_LEAVING;
	req.ie = NULL;
	req.ie_len = 0;

	if (wdev->current_bss) {
	req.bss = &wdev->current_bss->pub;
	rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
	if (wdev->current_bss) {
	cfg80211_unhold_bss(wdev->current_bss);
	cfg80211_put_bss(&wdev->current_bss->pub);
	wdev->current_bss = NULL;
	}
	}

	for (i = 0; i < MAX_AUTH_BSSES; i++) {
	if (wdev->auth_bsses[i]) {
	req.bss = &wdev->auth_bsses[i]->pub;
	rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
	if (wdev->auth_bsses[i]) {
	cfg80211_unhold_bss(wdev->auth_bsses[i]);
	cfg80211_put_bss(&wdev->auth_bsses[i]->pub);
	wdev->auth_bsses[i] = NULL;
	}
	}
	if (wdev->authtry_bsses[i]) {
	req.bss = &wdev->authtry_bsses[i]->pub;
	rdev->ops->deauth(&rdev->wiphy, dev, &req, wdev);
	if (wdev->authtry_bsses[i]) {
	cfg80211_unhold_bss(wdev->authtry_bsses[i]);
	cfg80211_put_bss(&wdev->authtry_bsses[i]->pub);
	wdev->authtry_bsses[i] = NULL;
	}
	}
	}
	}