/*
   * mac80211 configuration hooks for cfg80211
   *

   * Copyright 2006-2010	Johannes Berg <johannes@sipsolutions.net>

   *
   * This file is GPLv2 as found in COPYING.
   */

  #include <linux/ieee80211.h>

  #include <linux/nl80211.h>
  #include <linux/rtnetlink.h>

  #include <linux/slab.h>

  #include <net/net_namespace.h>

  #include <linux/rcupdate.h>

  #include <linux/if_ether.h>

  #include <net/cfg80211.h>
  #include "ieee80211_i.h"

  #include "driver-ops.h"

  #include "cfg.h"

  #include "rate.h"

  #include "mesh.h"

  static struct net_device *ieee80211_add_iface(struct wiphy *wiphy, char *name,
  					      enum nl80211_iftype type,
  					      u32 *flags,
  					      struct vif_params *params)

  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct net_device *dev;
  	struct ieee80211_sub_if_data *sdata;
  	int err;

  	err = ieee80211_if_add(local, name, &dev, type, params);

  	if (err)
  		return ERR_PTR(err);

  	if (type == NL80211_IFTYPE_MONITOR && flags) {
  		sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  		sdata->u.mntr_flags = *flags;
  	}
  
  	return dev;

  }

  static int ieee80211_del_iface(struct wiphy *wiphy, struct net_device *dev)

  {

  	ieee80211_if_remove(IEEE80211_DEV_TO_SUB_IF(dev));

  	return 0;

  }

  static int ieee80211_change_iface(struct wiphy *wiphy,
  				  struct net_device *dev,

  				  enum nl80211_iftype type, u32 *flags,
  				  struct vif_params *params)

  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	int ret;

  	ret = ieee80211_if_change_type(sdata, type);

  	if (ret)
  		return ret;

  	if (type == NL80211_IFTYPE_AP_VLAN &&
  	    params && params->use_4addr == 0)

  		RCU_INIT_POINTER(sdata->u.vlan.sta, NULL);

  	else if (type == NL80211_IFTYPE_STATION &&
  		 params && params->use_4addr >= 0)
  		sdata->u.mgd.use_4addr = params->use_4addr;

  	if (sdata->vif.type == NL80211_IFTYPE_MONITOR && flags) {
  		struct ieee80211_local *local = sdata->local;
  
  		if (ieee80211_sdata_running(sdata)) {
  			/*
  			 * Prohibit MONITOR_FLAG_COOK_FRAMES to be
  			 * changed while the interface is up.
  			 * Else we would need to add a lot of cruft
  			 * to update everything:
  			 *	cooked_mntrs, monitor and all fif_* counters
  			 *	reconfigure hardware
  			 */
  			if ((*flags & MONITOR_FLAG_COOK_FRAMES) !=
  			    (sdata->u.mntr_flags & MONITOR_FLAG_COOK_FRAMES))
  				return -EBUSY;
  
  			ieee80211_adjust_monitor_flags(sdata, -1);
  			sdata->u.mntr_flags = *flags;
  			ieee80211_adjust_monitor_flags(sdata, 1);
  
  			ieee80211_configure_filter(local);
  		} else {
  			/*
  			 * Because the interface is down, ieee80211_do_stop
  			 * and ieee80211_do_open take care of "everything"
  			 * mentioned in the comment above.
  			 */
  			sdata->u.mntr_flags = *flags;
  		}
  	}

  	return 0;
  }

  static int ieee80211_set_noack_map(struct wiphy *wiphy,
  				  struct net_device *dev,
  				  u16 noack_map)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	sdata->noack_map = noack_map;
  	return 0;
  }

  static int ieee80211_add_key(struct wiphy *wiphy, struct net_device *dev,

  			     u8 key_idx, bool pairwise, const u8 *mac_addr,

  			     struct key_params *params)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	struct sta_info *sta = NULL;

  	struct ieee80211_key *key;

  	int err;

  	if (!ieee80211_sdata_running(sdata))

  		return -ENETDOWN;

  	/* reject WEP and TKIP keys if WEP failed to initialize */

  	switch (params->cipher) {
  	case WLAN_CIPHER_SUITE_WEP40:

  	case WLAN_CIPHER_SUITE_TKIP:

  	case WLAN_CIPHER_SUITE_WEP104:
  		if (IS_ERR(sdata->local->wep_tx_tfm))
  			return -EINVAL;

  		break;

  	default:

  		break;

  	}

  	key = ieee80211_key_alloc(params->cipher, key_idx, params->key_len,
  				  params->key, params->seq_len, params->seq);

  	if (IS_ERR(key))
  		return PTR_ERR(key);

  	if (pairwise)
  		key->conf.flags |= IEEE80211_KEY_FLAG_PAIRWISE;

  	mutex_lock(&sdata->local->sta_mtx);

  	if (mac_addr) {

  		if (ieee80211_vif_is_mesh(&sdata->vif))
  			sta = sta_info_get(sdata, mac_addr);
  		else
  			sta = sta_info_get_bss(sdata, mac_addr);

  		if (!sta) {

  			ieee80211_key_free(sdata->local, key);

  			err = -ENOENT;
  			goto out_unlock;

  		}

  	}

  	err = ieee80211_key_link(key, sdata, sta);
  	if (err)
  		ieee80211_key_free(sdata->local, key);

   out_unlock:

  	mutex_unlock(&sdata->local->sta_mtx);

  
  	return err;

  }
  
  static int ieee80211_del_key(struct wiphy *wiphy, struct net_device *dev,

  			     u8 key_idx, bool pairwise, const u8 *mac_addr)

  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  	struct ieee80211_local *local = sdata->local;

  	struct sta_info *sta;

  	struct ieee80211_key *key = NULL;

  	int ret;

  	mutex_lock(&local->sta_mtx);
  	mutex_lock(&local->key_mtx);

  	if (mac_addr) {

  		ret = -ENOENT;

  		sta = sta_info_get_bss(sdata, mac_addr);

  		if (!sta)

  			goto out_unlock;

  		if (pairwise)

  			key = key_mtx_dereference(local, sta->ptk);

  		else

  			key = key_mtx_dereference(local, sta->gtk[key_idx]);

  	} else

  		key = key_mtx_dereference(local, sdata->keys[key_idx]);

  	if (!key) {

  		ret = -ENOENT;
  		goto out_unlock;
  	}

  	__ieee80211_key_free(key);

  	ret = 0;
   out_unlock:

  	mutex_unlock(&local->key_mtx);
  	mutex_unlock(&local->sta_mtx);

  
  	return ret;

  }

  static int ieee80211_get_key(struct wiphy *wiphy, struct net_device *dev,

  			     u8 key_idx, bool pairwise, const u8 *mac_addr,
  			     void *cookie,

  			     void (*callback)(void *cookie,
  					      struct key_params *params))
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct sta_info *sta = NULL;
  	u8 seq[6] = {0};
  	struct key_params params;

  	struct ieee80211_key *key = NULL;

  	u64 pn64;

  	u32 iv32;
  	u16 iv16;
  	int err = -ENOENT;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	rcu_read_lock();

  	if (mac_addr) {

  		sta = sta_info_get_bss(sdata, mac_addr);

  		if (!sta)
  			goto out;

  		if (pairwise)

  			key = rcu_dereference(sta->ptk);

  		else if (key_idx < NUM_DEFAULT_KEYS)

  			key = rcu_dereference(sta->gtk[key_idx]);

  	} else

  		key = rcu_dereference(sdata->keys[key_idx]);

  
  	if (!key)
  		goto out;
  
  	memset(&params, 0, sizeof(params));

  	params.cipher = key->conf.cipher;

  	switch (key->conf.cipher) {
  	case WLAN_CIPHER_SUITE_TKIP:

  		iv32 = key->u.tkip.tx.iv32;
  		iv16 = key->u.tkip.tx.iv16;

  		if (key->flags & KEY_FLAG_UPLOADED_TO_HARDWARE)
  			drv_get_tkip_seq(sdata->local,
  					 key->conf.hw_key_idx,
  					 &iv32, &iv16);

  
  		seq[0] = iv16 & 0xff;
  		seq[1] = (iv16 >> 8) & 0xff;
  		seq[2] = iv32 & 0xff;
  		seq[3] = (iv32 >> 8) & 0xff;
  		seq[4] = (iv32 >> 16) & 0xff;
  		seq[5] = (iv32 >> 24) & 0xff;
  		params.seq = seq;
  		params.seq_len = 6;
  		break;

  	case WLAN_CIPHER_SUITE_CCMP:

  		pn64 = atomic64_read(&key->u.ccmp.tx_pn);
  		seq[0] = pn64;
  		seq[1] = pn64 >> 8;
  		seq[2] = pn64 >> 16;
  		seq[3] = pn64 >> 24;
  		seq[4] = pn64 >> 32;
  		seq[5] = pn64 >> 40;

  		params.seq = seq;
  		params.seq_len = 6;
  		break;

  	case WLAN_CIPHER_SUITE_AES_CMAC:

  		pn64 = atomic64_read(&key->u.aes_cmac.tx_pn);
  		seq[0] = pn64;
  		seq[1] = pn64 >> 8;
  		seq[2] = pn64 >> 16;
  		seq[3] = pn64 >> 24;
  		seq[4] = pn64 >> 32;
  		seq[5] = pn64 >> 40;

  		params.seq = seq;
  		params.seq_len = 6;
  		break;

  	}
  
  	params.key = key->conf.key;
  	params.key_len = key->conf.keylen;
  
  	callback(cookie, &params);
  	err = 0;
  
   out:

  	rcu_read_unlock();

  	return err;
  }

  static int ieee80211_config_default_key(struct wiphy *wiphy,
  					struct net_device *dev,

  					u8 key_idx, bool uni,
  					bool multi)

  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	ieee80211_set_default_key(sdata, key_idx, uni, multi);

  
  	return 0;
  }

  static int ieee80211_config_default_mgmt_key(struct wiphy *wiphy,
  					     struct net_device *dev,
  					     u8 key_idx)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	ieee80211_set_default_mgmt_key(sdata, key_idx);

  	return 0;
  }

  static void rate_idx_to_bitrate(struct rate_info *rate, struct sta_info *sta, int idx)
  {
  	if (!(rate->flags & RATE_INFO_FLAGS_MCS)) {
  		struct ieee80211_supported_band *sband;
  		sband = sta->local->hw.wiphy->bands[
  				sta->local->hw.conf.channel->band];
  		rate->legacy = sband->bitrates[idx].bitrate;
  	} else
  		rate->mcs = idx;
  }

  static void sta_set_sinfo(struct sta_info *sta, struct station_info *sinfo)
  {

  	struct ieee80211_sub_if_data *sdata = sta->sdata;

  	struct timespec uptime;

  	sinfo->generation = sdata->local->sta_generation;

  	sinfo->filled = STATION_INFO_INACTIVE_TIME |
  			STATION_INFO_RX_BYTES |

  			STATION_INFO_TX_BYTES |

  			STATION_INFO_RX_PACKETS |
  			STATION_INFO_TX_PACKETS |

  			STATION_INFO_TX_RETRIES |
  			STATION_INFO_TX_FAILED |

  			STATION_INFO_TX_BITRATE |

  			STATION_INFO_RX_BITRATE |

  			STATION_INFO_RX_DROP_MISC |

  			STATION_INFO_BSS_PARAM |

  			STATION_INFO_CONNECTED_TIME |

  			STATION_INFO_STA_FLAGS |
  			STATION_INFO_BEACON_LOSS_COUNT;

  
  	do_posix_clock_monotonic_gettime(&uptime);
  	sinfo->connected_time = uptime.tv_sec - sta->last_connected;

  
  	sinfo->inactive_time = jiffies_to_msecs(jiffies - sta->last_rx);
  	sinfo->rx_bytes = sta->rx_bytes;
  	sinfo->tx_bytes = sta->tx_bytes;

  	sinfo->rx_packets = sta->rx_packets;
  	sinfo->tx_packets = sta->tx_packets;

  	sinfo->tx_retries = sta->tx_retry_count;
  	sinfo->tx_failed = sta->tx_retry_failed;

  	sinfo->rx_dropped_misc = sta->rx_dropped;

  	sinfo->beacon_loss_count = sta->beacon_loss_count;

  	if ((sta->local->hw.flags & IEEE80211_HW_SIGNAL_DBM) ||
  	    (sta->local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)) {

  		sinfo->filled |= STATION_INFO_SIGNAL | STATION_INFO_SIGNAL_AVG;

  		sinfo->signal = (s8)sta->last_signal;

  		sinfo->signal_avg = (s8) -ewma_read(&sta->avg_signal);

  	}
  
  	sinfo->txrate.flags = 0;
  	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_MCS)
  		sinfo->txrate.flags |= RATE_INFO_FLAGS_MCS;
  	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
  		sinfo->txrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
  	if (sta->last_tx_rate.flags & IEEE80211_TX_RC_SHORT_GI)
  		sinfo->txrate.flags |= RATE_INFO_FLAGS_SHORT_GI;

  	rate_idx_to_bitrate(&sinfo->txrate, sta, sta->last_tx_rate.idx);
  
  	sinfo->rxrate.flags = 0;
  	if (sta->last_rx_rate_flag & RX_FLAG_HT)
  		sinfo->rxrate.flags |= RATE_INFO_FLAGS_MCS;
  	if (sta->last_rx_rate_flag & RX_FLAG_40MHZ)
  		sinfo->rxrate.flags |= RATE_INFO_FLAGS_40_MHZ_WIDTH;
  	if (sta->last_rx_rate_flag & RX_FLAG_SHORT_GI)
  		sinfo->rxrate.flags |= RATE_INFO_FLAGS_SHORT_GI;
  	rate_idx_to_bitrate(&sinfo->rxrate, sta, sta->last_rx_rate_idx);

  	if (ieee80211_vif_is_mesh(&sdata->vif)) {

  #ifdef CONFIG_MAC80211_MESH

  		sinfo->filled |= STATION_INFO_LLID |
  				 STATION_INFO_PLID |
  				 STATION_INFO_PLINK_STATE;
  
  		sinfo->llid = le16_to_cpu(sta->llid);
  		sinfo->plid = le16_to_cpu(sta->plid);
  		sinfo->plink_state = sta->plink_state;

  #endif

  	}

  
  	sinfo->bss_param.flags = 0;
  	if (sdata->vif.bss_conf.use_cts_prot)
  		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_CTS_PROT;
  	if (sdata->vif.bss_conf.use_short_preamble)
  		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_PREAMBLE;
  	if (sdata->vif.bss_conf.use_short_slot)
  		sinfo->bss_param.flags |= BSS_PARAM_FLAGS_SHORT_SLOT_TIME;
  	sinfo->bss_param.dtim_period = sdata->local->hw.conf.ps_dtim_period;
  	sinfo->bss_param.beacon_interval = sdata->vif.bss_conf.beacon_int;

  
  	sinfo->sta_flags.set = 0;
  	sinfo->sta_flags.mask = BIT(NL80211_STA_FLAG_AUTHORIZED) |
  				BIT(NL80211_STA_FLAG_SHORT_PREAMBLE) |
  				BIT(NL80211_STA_FLAG_WME) |
  				BIT(NL80211_STA_FLAG_MFP) |

  				BIT(NL80211_STA_FLAG_AUTHENTICATED) |
  				BIT(NL80211_STA_FLAG_TDLS_PEER);

  	if (test_sta_flag(sta, WLAN_STA_AUTHORIZED))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHORIZED);
  	if (test_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
  	if (test_sta_flag(sta, WLAN_STA_WME))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_WME);
  	if (test_sta_flag(sta, WLAN_STA_MFP))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_MFP);
  	if (test_sta_flag(sta, WLAN_STA_AUTH))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_AUTHENTICATED);

  	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER))
  		sinfo->sta_flags.set |= BIT(NL80211_STA_FLAG_TDLS_PEER);

  }
  
  
  static int ieee80211_dump_station(struct wiphy *wiphy, struct net_device *dev,
  				 int idx, u8 *mac, struct station_info *sinfo)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	struct sta_info *sta;

  	int ret = -ENOENT;
  
  	rcu_read_lock();

  	sta = sta_info_get_by_idx(sdata, idx);

  	if (sta) {
  		ret = 0;

  		memcpy(mac, sta->sta.addr, ETH_ALEN);

  		sta_set_sinfo(sta, sinfo);
  	}

  	rcu_read_unlock();

  	return ret;

  }

  static int ieee80211_dump_survey(struct wiphy *wiphy, struct net_device *dev,
  				 int idx, struct survey_info *survey)
  {
  	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);

  	return drv_get_survey(local, idx, survey);
  }

  static int ieee80211_get_station(struct wiphy *wiphy, struct net_device *dev,

  				 u8 *mac, struct station_info *sinfo)

  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	struct sta_info *sta;

  	int ret = -ENOENT;

  	rcu_read_lock();

  	sta = sta_info_get_bss(sdata, mac);

  	if (sta) {
  		ret = 0;
  		sta_set_sinfo(sta, sinfo);
  	}
  
  	rcu_read_unlock();
  
  	return ret;

  }

  static void ieee80211_config_ap_ssid(struct ieee80211_sub_if_data *sdata,
  				     struct beacon_parameters *params)
  {
  	struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
  
  	bss_conf->ssid_len = params->ssid_len;
  
  	if (params->ssid_len)
  		memcpy(bss_conf->ssid, params->ssid, params->ssid_len);
  
  	bss_conf->hidden_ssid =
  		(params->hidden_ssid != NL80211_HIDDEN_SSID_NOT_IN_USE);
  }

  static int ieee80211_set_probe_resp(struct ieee80211_sub_if_data *sdata,
  				    u8 *resp, size_t resp_len)
  {
  	struct sk_buff *new, *old;
  
  	if (!resp || !resp_len)
  		return -EINVAL;

  	old = rtnl_dereference(sdata->u.ap.probe_resp);

  
  	new = dev_alloc_skb(resp_len);
  	if (!new)
  		return -ENOMEM;
  
  	memcpy(skb_put(new, resp_len), resp, resp_len);
  
  	rcu_assign_pointer(sdata->u.ap.probe_resp, new);
  	synchronize_rcu();
  
  	if (old)
  		dev_kfree_skb(old);
  
  	return 0;
  }

  /*
   * This handles both adding a beacon and setting new beacon info
   */
  static int ieee80211_config_beacon(struct ieee80211_sub_if_data *sdata,
  				   struct beacon_parameters *params)
  {
  	struct beacon_data *new, *old;
  	int new_head_len, new_tail_len;
  	int size;
  	int err = -EINVAL;

  	u32 changed = 0;

  	old = rtnl_dereference(sdata->u.ap.beacon);

  
  	/* head must not be zero-length */
  	if (params->head && !params->head_len)
  		return -EINVAL;
  
  	/*
  	 * This is a kludge. beacon interval should really be part
  	 * of the beacon information.
  	 */

  	if (params->interval &&
  	    (sdata->vif.bss_conf.beacon_int != params->interval)) {
  		sdata->vif.bss_conf.beacon_int = params->interval;
  		ieee80211_bss_info_change_notify(sdata,
  						 BSS_CHANGED_BEACON_INT);

  	}
  
  	/* Need to have a beacon head if we don't have one yet */
  	if (!params->head && !old)
  		return err;
  
  	/* sorry, no way to start beaconing without dtim period */
  	if (!params->dtim_period && !old)
  		return err;
  
  	/* new or old head? */
  	if (params->head)
  		new_head_len = params->head_len;
  	else
  		new_head_len = old->head_len;
  
  	/* new or old tail? */
  	if (params->tail || !old)
  		/* params->tail_len will be zero for !params->tail */
  		new_tail_len = params->tail_len;
  	else
  		new_tail_len = old->tail_len;
  
  	size = sizeof(*new) + new_head_len + new_tail_len;
  
  	new = kzalloc(size, GFP_KERNEL);
  	if (!new)
  		return -ENOMEM;
  
  	/* start filling the new info now */
  
  	/* new or old dtim period? */
  	if (params->dtim_period)
  		new->dtim_period = params->dtim_period;
  	else
  		new->dtim_period = old->dtim_period;
  
  	/*
  	 * pointers go into the block we allocated,
  	 * memory is | beacon_data | head | tail |
  	 */
  	new->head = ((u8 *) new) + sizeof(*new);
  	new->tail = new->head + new_head_len;
  	new->head_len = new_head_len;
  	new->tail_len = new_tail_len;
  
  	/* copy in head */
  	if (params->head)
  		memcpy(new->head, params->head, new_head_len);
  	else
  		memcpy(new->head, old->head, new_head_len);
  
  	/* copy in optional tail */
  	if (params->tail)
  		memcpy(new->tail, params->tail, new_tail_len);
  	else
  		if (old)
  			memcpy(new->tail, old->tail, new_tail_len);

  	sdata->vif.bss_conf.dtim_period = new->dtim_period;

  	rcu_assign_pointer(sdata->u.ap.beacon, new);

  
  	synchronize_rcu();
  
  	kfree(old);

  	err = ieee80211_set_probe_resp(sdata, params->probe_resp,
  				       params->probe_resp_len);
  	if (!err)
  		changed |= BSS_CHANGED_AP_PROBE_RESP;

  	ieee80211_config_ap_ssid(sdata, params);

  	changed |= BSS_CHANGED_BEACON_ENABLED |
  		   BSS_CHANGED_BEACON |
  		   BSS_CHANGED_SSID;

  	ieee80211_bss_info_change_notify(sdata, changed);

  	return 0;

  }
  
  static int ieee80211_add_beacon(struct wiphy *wiphy, struct net_device *dev,
  				struct beacon_parameters *params)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct beacon_data *old;

  	struct ieee80211_sub_if_data *vlan;
  	int ret;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	old = rtnl_dereference(sdata->u.ap.beacon);

  	if (old)
  		return -EALREADY;

  	ret = ieee80211_config_beacon(sdata, params);
  	if (ret)
  		return ret;
  
  	/*
  	 * Apply control port protocol, this allows us to
  	 * not encrypt dynamic WEP control frames.
  	 */
  	sdata->control_port_protocol = params->crypto.control_port_ethertype;
  	sdata->control_port_no_encrypt = params->crypto.control_port_no_encrypt;
  	list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) {
  		vlan->control_port_protocol =
  			params->crypto.control_port_ethertype;
  		vlan->control_port_no_encrypt =
  			params->crypto.control_port_no_encrypt;
  	}
  
  	return 0;

  }
  
  static int ieee80211_set_beacon(struct wiphy *wiphy, struct net_device *dev,
  				struct beacon_parameters *params)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct beacon_data *old;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	old = rtnl_dereference(sdata->u.ap.beacon);

  	if (!old)
  		return -ENOENT;
  
  	return ieee80211_config_beacon(sdata, params);
  }
  
  static int ieee80211_del_beacon(struct wiphy *wiphy, struct net_device *dev)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct beacon_data *old;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	old = rtnl_dereference(sdata->u.ap.beacon);

  	if (!old)
  		return -ENOENT;

  	RCU_INIT_POINTER(sdata->u.ap.beacon, NULL);

  	synchronize_rcu();
  	kfree(old);

  	ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BEACON_ENABLED);
  	return 0;

  }

  /* Layer 2 Update frame (802.2 Type 1 LLC XID Update response) */
  struct iapp_layer2_update {
  	u8 da[ETH_ALEN];	/* broadcast */
  	u8 sa[ETH_ALEN];	/* STA addr */
  	__be16 len;		/* 6 */
  	u8 dsap;		/* 0 */
  	u8 ssap;		/* 0 */
  	u8 control;
  	u8 xid_info[3];

  } __packed;

  
  static void ieee80211_send_layer2_update(struct sta_info *sta)
  {
  	struct iapp_layer2_update *msg;
  	struct sk_buff *skb;
  
  	/* Send Level 2 Update Frame to update forwarding tables in layer 2
  	 * bridge devices */
  
  	skb = dev_alloc_skb(sizeof(*msg));
  	if (!skb)
  		return;
  	msg = (struct iapp_layer2_update *)skb_put(skb, sizeof(*msg));
  
  	/* 802.2 Type 1 Logical Link Control (LLC) Exchange Identifier (XID)
  	 * Update response frame; IEEE Std 802.2-1998, 5.4.1.2.1 */
  
  	memset(msg->da, 0xff, ETH_ALEN);

  	memcpy(msg->sa, sta->sta.addr, ETH_ALEN);

  	msg->len = htons(6);
  	msg->dsap = 0;
  	msg->ssap = 0x01;	/* NULL LSAP, CR Bit: Response */
  	msg->control = 0xaf;	/* XID response lsb.1111F101.
  				 * F=0 (no poll command; unsolicited frame) */
  	msg->xid_info[0] = 0x81;	/* XID format identifier */
  	msg->xid_info[1] = 1;	/* LLC types/classes: Type 1 LLC */
  	msg->xid_info[2] = 0;	/* XID sender's receive window size (RW) */

  	skb->dev = sta->sdata->dev;
  	skb->protocol = eth_type_trans(skb, sta->sdata->dev);

  	memset(skb->cb, 0, sizeof(skb->cb));

  	netif_rx_ni(skb);

  }

  static int sta_apply_parameters(struct ieee80211_local *local,
  				struct sta_info *sta,
  				struct station_parameters *params)

  {

  	int ret = 0;

  	u32 rates;
  	int i, j;

  	struct ieee80211_supported_band *sband;

  	struct ieee80211_sub_if_data *sdata = sta->sdata;

  	u32 mask, set;

  	sband = local->hw.wiphy->bands[local->oper_channel->band];

  	mask = params->sta_flags_mask;
  	set = params->sta_flags_set;

  	/*
  	 * In mesh mode, we can clear AUTHENTICATED flag but must
  	 * also make ASSOCIATED follow appropriately for the driver
  	 * API. See also below, after AUTHORIZED changes.
  	 */
  	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
  		/* cfg80211 should not allow this in non-mesh modes */
  		if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
  			return -EINVAL;
  
  		if (set & BIT(NL80211_STA_FLAG_AUTHENTICATED) &&
  		    !test_sta_flag(sta, WLAN_STA_AUTH)) {
  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_AUTH);
  			if (ret)
  				return ret;
  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_ASSOC);
  			if (ret)
  				return ret;
  		}
  	}

  	if (mask & BIT(NL80211_STA_FLAG_AUTHORIZED)) {

  		if (set & BIT(NL80211_STA_FLAG_AUTHORIZED))

  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_AUTHORIZED);

  		else

  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_ASSOC);
  		if (ret)
  			return ret;
  	}
  
  	if (mask & BIT(NL80211_STA_FLAG_AUTHENTICATED)) {
  		/* cfg80211 should not allow this in non-mesh modes */
  		if (WARN_ON(!ieee80211_vif_is_mesh(&sdata->vif)))
  			return -EINVAL;
  
  		if (!(set & BIT(NL80211_STA_FLAG_AUTHENTICATED)) &&
  		    test_sta_flag(sta, WLAN_STA_AUTH)) {
  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_AUTH);
  			if (ret)
  				return ret;
  			ret = sta_info_move_state_checked(sta,
  					IEEE80211_STA_NONE);
  			if (ret)
  				return ret;
  		}

  	}

  	if (mask & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE)) {

  		if (set & BIT(NL80211_STA_FLAG_SHORT_PREAMBLE))

  			set_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);
  		else
  			clear_sta_flag(sta, WLAN_STA_SHORT_PREAMBLE);

  	}

  	if (mask & BIT(NL80211_STA_FLAG_WME)) {

  		if (set & BIT(NL80211_STA_FLAG_WME)) {

  			set_sta_flag(sta, WLAN_STA_WME);

  			sta->sta.wme = true;

  		} else {
  			clear_sta_flag(sta, WLAN_STA_WME);
  			sta->sta.wme = false;

  		}

  	}

  	if (mask & BIT(NL80211_STA_FLAG_MFP)) {

  		if (set & BIT(NL80211_STA_FLAG_MFP))

  			set_sta_flag(sta, WLAN_STA_MFP);
  		else
  			clear_sta_flag(sta, WLAN_STA_MFP);

  	}

  	if (mask & BIT(NL80211_STA_FLAG_TDLS_PEER)) {

  		if (set & BIT(NL80211_STA_FLAG_TDLS_PEER))

  			set_sta_flag(sta, WLAN_STA_TDLS_PEER);
  		else
  			clear_sta_flag(sta, WLAN_STA_TDLS_PEER);

  	}

  	if (params->sta_modify_mask & STATION_PARAM_APPLY_UAPSD) {
  		sta->sta.uapsd_queues = params->uapsd_queues;
  		sta->sta.max_sp = params->max_sp;
  	}

  	/*

  	 * cfg80211 validates this (1-2007) and allows setting the AID
  	 * only when creating a new station entry
  	 */
  	if (params->aid)
  		sta->sta.aid = params->aid;
  
  	/*

  	 * FIXME: updating the following information is racy when this
  	 *	  function is called from ieee80211_change_station().
  	 *	  However, all this information should be static so
  	 *	  maybe we should just reject attemps to change it.
  	 */

  	if (params->listen_interval >= 0)
  		sta->listen_interval = params->listen_interval;
  
  	if (params->supported_rates) {
  		rates = 0;

  		for (i = 0; i < params->supported_rates_len; i++) {
  			int rate = (params->supported_rates[i] & 0x7f) * 5;

  			for (j = 0; j < sband->n_bitrates; j++) {
  				if (sband->bitrates[j].bitrate == rate)

  					rates |= BIT(j);
  			}
  		}

  		sta->sta.supp_rates[local->oper_channel->band] = rates;

  	}

  	if (params->ht_capa)

  		ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,

  						  params->ht_capa,

  						  &sta->sta.ht_cap);

  	if (ieee80211_vif_is_mesh(&sdata->vif)) {

  #ifdef CONFIG_MAC80211_MESH

  		if (sdata->u.mesh.security & IEEE80211_MESH_SEC_SECURED)
  			switch (params->plink_state) {

  			case NL80211_PLINK_LISTEN:
  			case NL80211_PLINK_ESTAB:
  			case NL80211_PLINK_BLOCKED:

  				sta->plink_state = params->plink_state;
  				break;
  			default:
  				/*  nothing  */
  				break;
  			}
  		else
  			switch (params->plink_action) {
  			case PLINK_ACTION_OPEN:
  				mesh_plink_open(sta);
  				break;
  			case PLINK_ACTION_BLOCK:
  				mesh_plink_block(sta);
  				break;
  			}

  #endif

  	}

  
  	return 0;

  }
  
  static int ieee80211_add_station(struct wiphy *wiphy, struct net_device *dev,
  				 u8 *mac, struct station_parameters *params)
  {

  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct sta_info *sta;
  	struct ieee80211_sub_if_data *sdata;

  	int err;

  	int layer2_update;

  	if (params->vlan) {
  		sdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

  		if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
  		    sdata->vif.type != NL80211_IFTYPE_AP)

  			return -EINVAL;
  	} else
  		sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	if (compare_ether_addr(mac, sdata->vif.addr) == 0)

  		return -EINVAL;
  
  	if (is_multicast_ether_addr(mac))
  		return -EINVAL;
  
  	sta = sta_info_alloc(sdata, mac, GFP_KERNEL);

  	if (!sta)
  		return -ENOMEM;

  	sta_info_move_state(sta, IEEE80211_STA_AUTH);
  	sta_info_move_state(sta, IEEE80211_STA_ASSOC);

  	err = sta_apply_parameters(local, sta, params);
  	if (err) {
  		sta_info_free(local, sta);
  		return err;
  	}

  	/*
  	 * for TDLS, rate control should be initialized only when supported
  	 * rates are known.
  	 */
  	if (!test_sta_flag(sta, WLAN_STA_TDLS_PEER))
  		rate_control_rate_init(sta);

  	layer2_update = sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
  		sdata->vif.type == NL80211_IFTYPE_AP;

  	err = sta_info_insert_rcu(sta);

  	if (err) {

  		rcu_read_unlock();
  		return err;
  	}

  	if (layer2_update)

  		ieee80211_send_layer2_update(sta);
  
  	rcu_read_unlock();

  	return 0;
  }
  
  static int ieee80211_del_station(struct wiphy *wiphy, struct net_device *dev,
  				 u8 *mac)
  {

  	struct ieee80211_local *local = wiphy_priv(wiphy);
  	struct ieee80211_sub_if_data *sdata;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	if (mac)
  		return sta_info_destroy_addr_bss(sdata, mac);

  	sta_info_flush(local, sdata);

  	return 0;
  }
  
  static int ieee80211_change_station(struct wiphy *wiphy,
  				    struct net_device *dev,
  				    u8 *mac,
  				    struct station_parameters *params)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct sta_info *sta;
  	struct ieee80211_sub_if_data *vlansdata;

  	mutex_lock(&local->sta_mtx);

  	sta = sta_info_get_bss(sdata, mac);

  	if (!sta) {

  		mutex_unlock(&local->sta_mtx);

  		return -ENOENT;

  	}

  	/* in station mode, supported rates are only valid with TDLS */
  	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
  	    params->supported_rates &&
  	    !test_sta_flag(sta, WLAN_STA_TDLS_PEER)) {

  		mutex_unlock(&local->sta_mtx);

  		return -EINVAL;
  	}

  	if (params->vlan && params->vlan != sta->sdata->dev) {

  		vlansdata = IEEE80211_DEV_TO_SUB_IF(params->vlan);

  		if (vlansdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
  		    vlansdata->vif.type != NL80211_IFTYPE_AP) {

  			mutex_unlock(&local->sta_mtx);

  			return -EINVAL;

  		}

  		if (params->vlan->ieee80211_ptr->use_4addr) {

  			if (vlansdata->u.vlan.sta) {

  				mutex_unlock(&local->sta_mtx);

  				return -EBUSY;

  			}

  			rcu_assign_pointer(vlansdata->u.vlan.sta, sta);

  		}

  		sta->sdata = vlansdata;

  		ieee80211_send_layer2_update(sta);
  	}
  
  	sta_apply_parameters(local, sta, params);

  	if (test_sta_flag(sta, WLAN_STA_TDLS_PEER) && params->supported_rates)
  		rate_control_rate_init(sta);

  	mutex_unlock(&local->sta_mtx);

  	if (sdata->vif.type == NL80211_IFTYPE_STATION &&
  	    params->sta_flags_mask & BIT(NL80211_STA_FLAG_AUTHORIZED))
  		ieee80211_recalc_ps(local, -1);

  	return 0;
  }

  #ifdef CONFIG_MAC80211_MESH
  static int ieee80211_add_mpath(struct wiphy *wiphy, struct net_device *dev,
  				 u8 *dst, u8 *next_hop)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct mesh_path *mpath;
  	struct sta_info *sta;
  	int err;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	rcu_read_lock();

  	sta = sta_info_get(sdata, next_hop);

  	if (!sta) {
  		rcu_read_unlock();

  		return -ENOENT;

  	}

  	err = mesh_path_add(dst, sdata);

  	if (err) {
  		rcu_read_unlock();

  		return err;

  	}

  	mpath = mesh_path_lookup(dst, sdata);

  	if (!mpath) {
  		rcu_read_unlock();

  		return -ENXIO;
  	}
  	mesh_path_fix_nexthop(mpath, sta);

  	rcu_read_unlock();
  	return 0;
  }
  
  static int ieee80211_del_mpath(struct wiphy *wiphy, struct net_device *dev,
  				 u8 *dst)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	if (dst)

  		return mesh_path_del(dst, sdata);

  	mesh_path_flush_by_iface(sdata);

  	return 0;
  }
  
  static int ieee80211_change_mpath(struct wiphy *wiphy,
  				    struct net_device *dev,
  				    u8 *dst, u8 *next_hop)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct mesh_path *mpath;
  	struct sta_info *sta;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	rcu_read_lock();

  	sta = sta_info_get(sdata, next_hop);

  	if (!sta) {
  		rcu_read_unlock();

  		return -ENOENT;

  	}

  	mpath = mesh_path_lookup(dst, sdata);

  	if (!mpath) {
  		rcu_read_unlock();

  		return -ENOENT;
  	}
  
  	mesh_path_fix_nexthop(mpath, sta);

  	rcu_read_unlock();
  	return 0;
  }
  
  static void mpath_set_pinfo(struct mesh_path *mpath, u8 *next_hop,
  			    struct mpath_info *pinfo)
  {

  	struct sta_info *next_hop_sta = rcu_dereference(mpath->next_hop);
  
  	if (next_hop_sta)
  		memcpy(next_hop, next_hop_sta->sta.addr, ETH_ALEN);

  	else
  		memset(next_hop, 0, ETH_ALEN);

  	pinfo->generation = mesh_paths_generation;

  	pinfo->filled = MPATH_INFO_FRAME_QLEN |

  			MPATH_INFO_SN |

  			MPATH_INFO_METRIC |
  			MPATH_INFO_EXPTIME |
  			MPATH_INFO_DISCOVERY_TIMEOUT |
  			MPATH_INFO_DISCOVERY_RETRIES |
  			MPATH_INFO_FLAGS;
  
  	pinfo->frame_qlen = mpath->frame_queue.qlen;

  	pinfo->sn = mpath->sn;

  	pinfo->metric = mpath->metric;
  	if (time_before(jiffies, mpath->exp_time))
  		pinfo->exptime = jiffies_to_msecs(mpath->exp_time - jiffies);
  	pinfo->discovery_timeout =
  			jiffies_to_msecs(mpath->discovery_timeout);
  	pinfo->discovery_retries = mpath->discovery_retries;
  	pinfo->flags = 0;
  	if (mpath->flags & MESH_PATH_ACTIVE)
  		pinfo->flags |= NL80211_MPATH_FLAG_ACTIVE;
  	if (mpath->flags & MESH_PATH_RESOLVING)
  		pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;

  	if (mpath->flags & MESH_PATH_SN_VALID)
  		pinfo->flags |= NL80211_MPATH_FLAG_SN_VALID;

  	if (mpath->flags & MESH_PATH_FIXED)
  		pinfo->flags |= NL80211_MPATH_FLAG_FIXED;
  	if (mpath->flags & MESH_PATH_RESOLVING)
  		pinfo->flags |= NL80211_MPATH_FLAG_RESOLVING;
  
  	pinfo->flags = mpath->flags;
  }
  
  static int ieee80211_get_mpath(struct wiphy *wiphy, struct net_device *dev,
  			       u8 *dst, u8 *next_hop, struct mpath_info *pinfo)
  
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct mesh_path *mpath;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	rcu_read_lock();

  	mpath = mesh_path_lookup(dst, sdata);

  	if (!mpath) {
  		rcu_read_unlock();
  		return -ENOENT;
  	}
  	memcpy(dst, mpath->dst, ETH_ALEN);
  	mpath_set_pinfo(mpath, next_hop, pinfo);
  	rcu_read_unlock();
  	return 0;
  }
  
  static int ieee80211_dump_mpath(struct wiphy *wiphy, struct net_device *dev,
  				 int idx, u8 *dst, u8 *next_hop,
  				 struct mpath_info *pinfo)
  {

  	struct ieee80211_sub_if_data *sdata;

  	struct mesh_path *mpath;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	rcu_read_lock();

  	mpath = mesh_path_lookup_by_idx(idx, sdata);

  	if (!mpath) {
  		rcu_read_unlock();
  		return -ENOENT;
  	}
  	memcpy(dst, mpath->dst, ETH_ALEN);
  	mpath_set_pinfo(mpath, next_hop, pinfo);
  	rcu_read_unlock();
  	return 0;
  }

  static int ieee80211_get_mesh_config(struct wiphy *wiphy,

  				struct net_device *dev,
  				struct mesh_config *conf)
  {
  	struct ieee80211_sub_if_data *sdata;
  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	memcpy(conf, &(sdata->u.mesh.mshcfg), sizeof(struct mesh_config));
  	return 0;
  }
  
  static inline bool _chg_mesh_attr(enum nl80211_meshconf_params parm, u32 mask)
  {
  	return (mask >> (parm-1)) & 0x1;
  }

  static int copy_mesh_setup(struct ieee80211_if_mesh *ifmsh,
  		const struct mesh_setup *setup)
  {
  	u8 *new_ie;
  	const u8 *old_ie;

  	struct ieee80211_sub_if_data *sdata = container_of(ifmsh,
  					struct ieee80211_sub_if_data, u.mesh);

  	/* allocate information elements */

  	new_ie = NULL;

  	old_ie = ifmsh->ie;

  	if (setup->ie_len) {
  		new_ie = kmemdup(setup->ie, setup->ie_len,

  				GFP_KERNEL);
  		if (!new_ie)
  			return -ENOMEM;
  	}

  	ifmsh->ie_len = setup->ie_len;
  	ifmsh->ie = new_ie;
  	kfree(old_ie);

  
  	/* now copy the rest of the setup parameters */
  	ifmsh->mesh_id_len = setup->mesh_id_len;
  	memcpy(ifmsh->mesh_id, setup->mesh_id, ifmsh->mesh_id_len);
  	ifmsh->mesh_pp_id = setup->path_sel_proto;
  	ifmsh->mesh_pm_id = setup->path_metric;

  	ifmsh->security = IEEE80211_MESH_SEC_NONE;
  	if (setup->is_authenticated)
  		ifmsh->security |= IEEE80211_MESH_SEC_AUTHED;
  	if (setup->is_secure)
  		ifmsh->security |= IEEE80211_MESH_SEC_SECURED;

  	/* mcast rate setting in Mesh Node */
  	memcpy(sdata->vif.bss_conf.mcast_rate, setup->mcast_rate,
  						sizeof(setup->mcast_rate));

  	return 0;
  }

  static int ieee80211_update_mesh_config(struct wiphy *wiphy,

  					struct net_device *dev, u32 mask,
  					const struct mesh_config *nconf)

  {
  	struct mesh_config *conf;
  	struct ieee80211_sub_if_data *sdata;

  	struct ieee80211_if_mesh *ifmsh;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	ifmsh = &sdata->u.mesh;

  	/* Set the config options which we are interested in setting */
  	conf = &(sdata->u.mesh.mshcfg);
  	if (_chg_mesh_attr(NL80211_MESHCONF_RETRY_TIMEOUT, mask))
  		conf->dot11MeshRetryTimeout = nconf->dot11MeshRetryTimeout;
  	if (_chg_mesh_attr(NL80211_MESHCONF_CONFIRM_TIMEOUT, mask))
  		conf->dot11MeshConfirmTimeout = nconf->dot11MeshConfirmTimeout;
  	if (_chg_mesh_attr(NL80211_MESHCONF_HOLDING_TIMEOUT, mask))
  		conf->dot11MeshHoldingTimeout = nconf->dot11MeshHoldingTimeout;
  	if (_chg_mesh_attr(NL80211_MESHCONF_MAX_PEER_LINKS, mask))
  		conf->dot11MeshMaxPeerLinks = nconf->dot11MeshMaxPeerLinks;
  	if (_chg_mesh_attr(NL80211_MESHCONF_MAX_RETRIES, mask))
  		conf->dot11MeshMaxRetries = nconf->dot11MeshMaxRetries;
  	if (_chg_mesh_attr(NL80211_MESHCONF_TTL, mask))
  		conf->dot11MeshTTL = nconf->dot11MeshTTL;

  	if (_chg_mesh_attr(NL80211_MESHCONF_ELEMENT_TTL, mask))
  		conf->dot11MeshTTL = nconf->element_ttl;

  	if (_chg_mesh_attr(NL80211_MESHCONF_AUTO_OPEN_PLINKS, mask))
  		conf->auto_open_plinks = nconf->auto_open_plinks;
  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_MAX_PREQ_RETRIES, mask))
  		conf->dot11MeshHWMPmaxPREQretries =
  			nconf->dot11MeshHWMPmaxPREQretries;
  	if (_chg_mesh_attr(NL80211_MESHCONF_PATH_REFRESH_TIME, mask))
  		conf->path_refresh_time = nconf->path_refresh_time;
  	if (_chg_mesh_attr(NL80211_MESHCONF_MIN_DISCOVERY_TIMEOUT, mask))
  		conf->min_discovery_timeout = nconf->min_discovery_timeout;
  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ACTIVE_PATH_TIMEOUT, mask))
  		conf->dot11MeshHWMPactivePathTimeout =
  			nconf->dot11MeshHWMPactivePathTimeout;
  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PREQ_MIN_INTERVAL, mask))
  		conf->dot11MeshHWMPpreqMinInterval =
  			nconf->dot11MeshHWMPpreqMinInterval;

  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_PERR_MIN_INTERVAL, mask))
  		conf->dot11MeshHWMPperrMinInterval =
  			nconf->dot11MeshHWMPperrMinInterval;

  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_NET_DIAM_TRVS_TIME,
  			   mask))
  		conf->dot11MeshHWMPnetDiameterTraversalTime =
  			nconf->dot11MeshHWMPnetDiameterTraversalTime;

  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_ROOTMODE, mask)) {
  		conf->dot11MeshHWMPRootMode = nconf->dot11MeshHWMPRootMode;
  		ieee80211_mesh_root_setup(ifmsh);
  	}

  	if (_chg_mesh_attr(NL80211_MESHCONF_GATE_ANNOUNCEMENTS, mask)) {

  		/* our current gate announcement implementation rides on root
  		 * announcements, so require this ifmsh to also be a root node
  		 * */
  		if (nconf->dot11MeshGateAnnouncementProtocol &&
  		    !conf->dot11MeshHWMPRootMode) {
  			conf->dot11MeshHWMPRootMode = 1;
  			ieee80211_mesh_root_setup(ifmsh);
  		}

  		conf->dot11MeshGateAnnouncementProtocol =
  			nconf->dot11MeshGateAnnouncementProtocol;
  	}

  	if (_chg_mesh_attr(NL80211_MESHCONF_HWMP_RANN_INTERVAL, mask)) {
  		conf->dot11MeshHWMPRannInterval =
  			nconf->dot11MeshHWMPRannInterval;
  	}

  	return 0;
  }

  static int ieee80211_join_mesh(struct wiphy *wiphy, struct net_device *dev,
  			       const struct mesh_config *conf,
  			       const struct mesh_setup *setup)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  	struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;

  	int err;

  	memcpy(&ifmsh->mshcfg, conf, sizeof(struct mesh_config));
  	err = copy_mesh_setup(ifmsh, setup);
  	if (err)
  		return err;

  	ieee80211_start_mesh(sdata);
  
  	return 0;
  }
  
  static int ieee80211_leave_mesh(struct wiphy *wiphy, struct net_device *dev)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	ieee80211_stop_mesh(sdata);
  
  	return 0;
  }

  #endif

  static int ieee80211_change_bss(struct wiphy *wiphy,
  				struct net_device *dev,
  				struct bss_parameters *params)
  {

  	struct ieee80211_sub_if_data *sdata;
  	u32 changed = 0;

  	sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	if (params->use_cts_prot >= 0) {

  		sdata->vif.bss_conf.use_cts_prot = params->use_cts_prot;

  		changed |= BSS_CHANGED_ERP_CTS_PROT;
  	}
  	if (params->use_short_preamble >= 0) {

  		sdata->vif.bss_conf.use_short_preamble =

  			params->use_short_preamble;
  		changed |= BSS_CHANGED_ERP_PREAMBLE;
  	}

  
  	if (!sdata->vif.bss_conf.use_short_slot &&
  	    sdata->local->hw.conf.channel->band == IEEE80211_BAND_5GHZ) {
  		sdata->vif.bss_conf.use_short_slot = true;
  		changed |= BSS_CHANGED_ERP_SLOT;
  	}

  	if (params->use_short_slot_time >= 0) {

  		sdata->vif.bss_conf.use_short_slot =

  			params->use_short_slot_time;
  		changed |= BSS_CHANGED_ERP_SLOT;
  	}

  	if (params->basic_rates) {
  		int i, j;
  		u32 rates = 0;
  		struct ieee80211_local *local = wiphy_priv(wiphy);
  		struct ieee80211_supported_band *sband =
  			wiphy->bands[local->oper_channel->band];
  
  		for (i = 0; i < params->basic_rates_len; i++) {
  			int rate = (params->basic_rates[i] & 0x7f) * 5;
  			for (j = 0; j < sband->n_bitrates; j++) {
  				if (sband->bitrates[j].bitrate == rate)
  					rates |= BIT(j);
  			}
  		}
  		sdata->vif.bss_conf.basic_rates = rates;
  		changed |= BSS_CHANGED_BASIC_RATES;
  	}

  	if (params->ap_isolate >= 0) {
  		if (params->ap_isolate)
  			sdata->flags |= IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
  		else
  			sdata->flags &= ~IEEE80211_SDATA_DONT_BRIDGE_PACKETS;
  	}

  	if (params->ht_opmode >= 0) {
  		sdata->vif.bss_conf.ht_operation_mode =
  			(u16) params->ht_opmode;
  		changed |= BSS_CHANGED_HT;
  	}

  	ieee80211_bss_info_change_notify(sdata, changed);
  
  	return 0;
  }

  static int ieee80211_set_txq_params(struct wiphy *wiphy,

  				    struct net_device *dev,

  				    struct ieee80211_txq_params *params)
  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	struct ieee80211_tx_queue_params p;
  
  	if (!local->ops->conf_tx)
  		return -EOPNOTSUPP;
  
  	memset(&p, 0, sizeof(p));
  	p.aifs = params->aifs;
  	p.cw_max = params->cwmax;
  	p.cw_min = params->cwmin;
  	p.txop = params->txop;

  
  	/*
  	 * Setting tx queue params disables u-apsd because it's only
  	 * called in master mode.
  	 */
  	p.uapsd = false;

  	if (params->queue >= local->hw.queues)
  		return -EINVAL;

  	sdata->tx_conf[params->queue] = p;
  	if (drv_conf_tx(local, sdata, params->queue, &p)) {

  		wiphy_debug(local->hw.wiphy,
  			    "failed to set TX queue parameters for queue %d
  ",
  			    params->queue);

  		return -EINVAL;
  	}
  
  	return 0;
  }

  static int ieee80211_set_channel(struct wiphy *wiphy,

  				 struct net_device *netdev,

  				 struct ieee80211_channel *chan,

  				 enum nl80211_channel_type channel_type)

  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct ieee80211_sub_if_data *sdata = NULL;

  	struct ieee80211_channel *old_oper;
  	enum nl80211_channel_type old_oper_type;
  	enum nl80211_channel_type old_vif_oper_type= NL80211_CHAN_NO_HT;

  
  	if (netdev)
  		sdata = IEEE80211_DEV_TO_SUB_IF(netdev);

  	switch (ieee80211_get_channel_mode(local, NULL)) {
  	case CHAN_MODE_HOPPING:
  		return -EBUSY;
  	case CHAN_MODE_FIXED:

  		if (local->oper_channel != chan)
  			return -EBUSY;
  		if (!sdata && local->_oper_channel_type == channel_type)

  			return 0;

  		break;

  	case CHAN_MODE_UNDEFINED:
  		break;
  	}

  	if (sdata)
  		old_vif_oper_type = sdata->vif.bss_conf.channel_type;
  	old_oper_type = local->_oper_channel_type;

  	if (!ieee80211_set_channel_type(local, sdata, channel_type))
  		return -EBUSY;

  	old_oper = local->oper_channel;
  	local->oper_channel = chan;
  
  	/* Update driver if changes were actually made. */
  	if ((old_oper != local->oper_channel) ||
  	    (old_oper_type != local->_oper_channel_type))
  		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);

  	if (sdata && sdata->vif.type != NL80211_IFTYPE_MONITOR &&

  	    old_vif_oper_type != sdata->vif.bss_conf.channel_type)

  		ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_HT);
  
  	return 0;

  }

  #ifdef CONFIG_PM

  static int ieee80211_suspend(struct wiphy *wiphy,
  			     struct cfg80211_wowlan *wowlan)

  {

  	return __ieee80211_suspend(wiphy_priv(wiphy), wowlan);

  }
  
  static int ieee80211_resume(struct wiphy *wiphy)
  {
  	return __ieee80211_resume(wiphy_priv(wiphy));
  }
  #else
  #define ieee80211_suspend NULL
  #define ieee80211_resume NULL
  #endif

  static int ieee80211_scan(struct wiphy *wiphy,
  			  struct net_device *dev,
  			  struct cfg80211_scan_request *req)
  {

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	switch (ieee80211_vif_type_p2p(&sdata->vif)) {
  	case NL80211_IFTYPE_STATION:
  	case NL80211_IFTYPE_ADHOC:
  	case NL80211_IFTYPE_MESH_POINT:
  	case NL80211_IFTYPE_P2P_CLIENT:
  		break;
  	case NL80211_IFTYPE_P2P_GO:
  		if (sdata->local->ops->hw_scan)
  			break;

  		/*
  		 * FIXME: implement NoA while scanning in software,
  		 * for now fall through to allow scanning only when
  		 * beaconing hasn't been configured yet
  		 */

  	case NL80211_IFTYPE_AP:
  		if (sdata->u.ap.beacon)
  			return -EOPNOTSUPP;
  		break;
  	default:
  		return -EOPNOTSUPP;
  	}

  
  	return ieee80211_request_scan(sdata, req);
  }

  static int
  ieee80211_sched_scan_start(struct wiphy *wiphy,
  			   struct net_device *dev,
  			   struct cfg80211_sched_scan_request *req)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	if (!sdata->local->ops->sched_scan_start)
  		return -EOPNOTSUPP;
  
  	return ieee80211_request_sched_scan_start(sdata, req);
  }
  
  static int

  ieee80211_sched_scan_stop(struct wiphy *wiphy, struct net_device *dev)

  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	if (!sdata->local->ops->sched_scan_stop)
  		return -EOPNOTSUPP;

  	return ieee80211_request_sched_scan_stop(sdata);

  }

  static int ieee80211_auth(struct wiphy *wiphy, struct net_device *dev,
  			  struct cfg80211_auth_request *req)
  {

  	return ieee80211_mgd_auth(IEEE80211_DEV_TO_SUB_IF(dev), req);

  }
  
  static int ieee80211_assoc(struct wiphy *wiphy, struct net_device *dev,
  			   struct cfg80211_assoc_request *req)
  {

  	struct ieee80211_local *local = wiphy_priv(wiphy);
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	switch (ieee80211_get_channel_mode(local, sdata)) {
  	case CHAN_MODE_HOPPING:
  		return -EBUSY;
  	case CHAN_MODE_FIXED:
  		if (local->oper_channel == req->bss->channel)
  			break;
  		return -EBUSY;
  	case CHAN_MODE_UNDEFINED:
  		break;
  	}

  	return ieee80211_mgd_assoc(IEEE80211_DEV_TO_SUB_IF(dev), req);

  }
  
  static int ieee80211_deauth(struct wiphy *wiphy, struct net_device *dev,

  			    struct cfg80211_deauth_request *req,
  			    void *cookie)

  {

  	return ieee80211_mgd_deauth(IEEE80211_DEV_TO_SUB_IF(dev),
  				    req, cookie);

  }
  
  static int ieee80211_disassoc(struct wiphy *wiphy, struct net_device *dev,

  			      struct cfg80211_disassoc_request *req,
  			      void *cookie)

  {

  	return ieee80211_mgd_disassoc(IEEE80211_DEV_TO_SUB_IF(dev),
  				      req, cookie);

  }

  static int ieee80211_join_ibss(struct wiphy *wiphy, struct net_device *dev,
  			       struct cfg80211_ibss_params *params)
  {

  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

  	switch (ieee80211_get_channel_mode(local, sdata)) {
  	case CHAN_MODE_HOPPING:
  		return -EBUSY;
  	case CHAN_MODE_FIXED:
  		if (!params->channel_fixed)
  			return -EBUSY;
  		if (local->oper_channel == params->channel)
  			break;
  		return -EBUSY;
  	case CHAN_MODE_UNDEFINED:
  		break;
  	}

  	return ieee80211_ibss_join(sdata, params);
  }
  
  static int ieee80211_leave_ibss(struct wiphy *wiphy, struct net_device *dev)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	return ieee80211_ibss_leave(sdata);
  }

  static int ieee80211_set_wiphy_params(struct wiphy *wiphy, u32 changed)
  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);

  	int err;

  	if (changed & WIPHY_PARAM_FRAG_THRESHOLD) {
  		err = drv_set_frag_threshold(local, wiphy->frag_threshold);
  
  		if (err)
  			return err;
  	}

  	if (changed & WIPHY_PARAM_COVERAGE_CLASS) {
  		err = drv_set_coverage_class(local, wiphy->coverage_class);
  
  		if (err)
  			return err;
  	}

  	if (changed & WIPHY_PARAM_RTS_THRESHOLD) {

  		err = drv_set_rts_threshold(local, wiphy->rts_threshold);

  		if (err)
  			return err;

  	}
  
  	if (changed & WIPHY_PARAM_RETRY_SHORT)
  		local->hw.conf.short_frame_max_tx_count = wiphy->retry_short;
  	if (changed & WIPHY_PARAM_RETRY_LONG)
  		local->hw.conf.long_frame_max_tx_count = wiphy->retry_long;
  	if (changed &
  	    (WIPHY_PARAM_RETRY_SHORT | WIPHY_PARAM_RETRY_LONG))
  		ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_RETRY_LIMITS);
  
  	return 0;
  }

  static int ieee80211_set_tx_power(struct wiphy *wiphy,

  				  enum nl80211_tx_power_setting type, int mbm)

  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);
  	struct ieee80211_channel *chan = local->hw.conf.channel;
  	u32 changes = 0;

  
  	switch (type) {

  	case NL80211_TX_POWER_AUTOMATIC:

  		local->user_power_level = -1;
  		break;

  	case NL80211_TX_POWER_LIMITED:
  		if (mbm < 0 || (mbm % 100))
  			return -EOPNOTSUPP;
  		local->user_power_level = MBM_TO_DBM(mbm);

  		break;

  	case NL80211_TX_POWER_FIXED:
  		if (mbm < 0 || (mbm % 100))
  			return -EOPNOTSUPP;

  		/* TODO: move to cfg80211 when it knows the channel */

  		if (MBM_TO_DBM(mbm) > chan->max_power)

  			return -EINVAL;

  		local->user_power_level = MBM_TO_DBM(mbm);

  		break;

  	}
  
  	ieee80211_hw_config(local, changes);
  
  	return 0;
  }
  
  static int ieee80211_get_tx_power(struct wiphy *wiphy, int *dbm)
  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);
  
  	*dbm = local->hw.conf.power_level;

  	return 0;
  }

  static int ieee80211_set_wds_peer(struct wiphy *wiphy, struct net_device *dev,

  				  const u8 *addr)

  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  
  	memcpy(&sdata->u.wds.remote_addr, addr, ETH_ALEN);
  
  	return 0;
  }

  static void ieee80211_rfkill_poll(struct wiphy *wiphy)
  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);
  
  	drv_rfkill_poll(local);
  }

  #ifdef CONFIG_NL80211_TESTMODE

  static int ieee80211_testmode_cmd(struct wiphy *wiphy, void *data, int len)

  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);
  
  	if (!local->ops->testmode_cmd)
  		return -EOPNOTSUPP;
  
  	return local->ops->testmode_cmd(&local->hw, data, len);
  }

  
  static int ieee80211_testmode_dump(struct wiphy *wiphy,
  				   struct sk_buff *skb,
  				   struct netlink_callback *cb,
  				   void *data, int len)
  {
  	struct ieee80211_local *local = wiphy_priv(wiphy);
  
  	if (!local->ops->testmode_dump)
  		return -EOPNOTSUPP;
  
  	return local->ops->testmode_dump(&local->hw, skb, cb, data, len);
  }

  #endif

  int __ieee80211_request_smps(struct ieee80211_sub_if_data *sdata,
  			     enum ieee80211_smps_mode smps_mode)
  {
  	const u8 *ap;
  	enum ieee80211_smps_mode old_req;
  	int err;

  	lockdep_assert_held(&sdata->u.mgd.mtx);

  	old_req = sdata->u.mgd.req_smps;
  	sdata->u.mgd.req_smps = smps_mode;
  
  	if (old_req == smps_mode &&
  	    smps_mode != IEEE80211_SMPS_AUTOMATIC)
  		return 0;
  
  	/*
  	 * If not associated, or current association is not an HT
  	 * association, there's no need to send an action frame.
  	 */
  	if (!sdata->u.mgd.associated ||

  	    sdata->vif.bss_conf.channel_type == NL80211_CHAN_NO_HT) {

  		mutex_lock(&sdata->local->iflist_mtx);

  		ieee80211_recalc_smps(sdata->local);

  		mutex_unlock(&sdata->local->iflist_mtx);
  		return 0;
  	}

  	ap = sdata->u.mgd.associated->bssid;

  
  	if (smps_mode == IEEE80211_SMPS_AUTOMATIC) {
  		if (sdata->u.mgd.powersave)
  			smps_mode = IEEE80211_SMPS_DYNAMIC;
  		else
  			smps_mode = IEEE80211_SMPS_OFF;
  	}
  
  	/* send SM PS frame to AP */
  	err = ieee80211_send_smps_action(sdata, smps_mode,
  					 ap, ap);
  	if (err)
  		sdata->u.mgd.req_smps = old_req;
  
  	return err;
  }

  static int ieee80211_set_power_mgmt(struct wiphy *wiphy, struct net_device *dev,
  				    bool enabled, int timeout)
  {
  	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
  	struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr);

  	if (sdata->vif.type != NL80211_IFTYPE_STATION)
  		return -EOPNOTSUPP;

  	if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS))
  		return -EOPNOTSUPP;
  
  	if (enabled == sdata->u.mgd.powersave &&

  	    timeout == local->dynamic_ps_forced_timeout)

  		return 0;
  
  	sdata->u.mgd.powersave = enabled;

  	local->dynamic_ps_forced_timeout = timeout;

  	/* no change, but if automatic follow powersave */
  	mutex_lock(&sdata->u.mgd.mtx);
  	__ieee80211_request_smps(sdata, sdata->u.mgd.req_smps);
  	mutex_unlock(&sdata->u.mgd.mtx);