text: /* IEEE 802.11 SoftMAC layer
   * Copyright (c) 2005 Andrea Merello <andreamrl@tiscali.it>
   *
   * Mostly extracted from the rtl8180-sa2400 driver for the
   * in-kernel generic ieee802.11 stack.
   *
   * Some pieces of code might be stolen from ipw2100 driver
   * copyright of who own it's copyright ;-)
   *
   * PS wx handler mostly stolen from hostap, copyright who
   * own it's copyright ;-)
   *
   * released under the GPL
   */
  
  
  #include "ieee80211.h"
  #ifdef ENABLE_DOT11D
  #include "dot11d.h"
  #endif
  
  const long ieee80211_wlan_frequencies[] = {
  	2412, 2417, 2422, 2427,
  	2432, 2437, 2442, 2447,
  	2452, 2457, 2462, 2467,
  	2472, 2484
  };
  
  
  int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
  			     union iwreq_data *wrqu, char *b)
  {
  	int ret;
  	struct iw_freq *fwrq = & wrqu->freq;
  
  	down(&ieee->wx_sem);
  
  	if(ieee->iw_mode == IW_MODE_INFRA){
  		ret = -EOPNOTSUPP;
  		goto out;
  	}
  
  	/* if setting by freq convert to channel */
  	if (fwrq->e == 1) {
  		if ((fwrq->m >= (int) 2.412e8 &&
  		     fwrq->m <= (int) 2.487e8)) {
  			int f = fwrq->m / 100000;
  			int c = 0;
  
  			while ((c < 14) && (f != ieee80211_wlan_frequencies[c]))
  				c++;
  
  			/* hack to fall through */
  			fwrq->e = 0;
  			fwrq->m = c + 1;
  		}
  	}
  
  	if (fwrq->e > 0 || fwrq->m > 14 || fwrq->m < 1 ){
  		ret = -EOPNOTSUPP;
  		goto out;
  
  	}else { /* Set the channel */
  
  #ifdef ENABLE_DOT11D
  		if (!(GET_DOT11D_INFO(ieee)->channel_map)[fwrq->m]) {
  			ret = -EINVAL;
  			goto out;
  		}
  #endif
  		ieee->current_network.channel = fwrq->m;
  		ieee->set_chan(ieee->dev, ieee->current_network.channel);
  
  		if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  			if(ieee->state == IEEE80211_LINKED){
  
  			ieee80211_stop_send_beacons(ieee);
  			ieee80211_start_send_beacons(ieee);
  			}
  	}
  
  	ret = 0;
  out:
  	up(&ieee->wx_sem);
  	return ret;
  }
  
  
  int ieee80211_wx_get_freq(struct ieee80211_device *ieee,
  			     struct iw_request_info *a,
  			     union iwreq_data *wrqu, char *b)
  {
  	struct iw_freq *fwrq = & wrqu->freq;
  
  	if (ieee->current_network.channel == 0)
  		return -1;
  	//NM 0.7.0 will not accept channel any more.
  	fwrq->m = ieee80211_wlan_frequencies[ieee->current_network.channel-1] * 100000;
  	fwrq->e = 1;
  //	fwrq->m = ieee->current_network.channel;
  //	fwrq->e = 0;
  
  	return 0;
  }
  
  int ieee80211_wx_get_wap(struct ieee80211_device *ieee,
  			    struct iw_request_info *info,
  			    union iwreq_data *wrqu, char *extra)
  {
  	unsigned long flags;
  	wrqu->ap_addr.sa_family = ARPHRD_ETHER;
  
  	if (ieee->iw_mode == IW_MODE_MONITOR)
  		return -1;
  
  	/* We want avoid to give to the user inconsistent infos*/
  	spin_lock_irqsave(&ieee->lock, flags);
  
  	if (ieee->state != IEEE80211_LINKED &&
  		ieee->state != IEEE80211_LINKED_SCANNING &&
  		ieee->wap_set == 0)
  
  		memset(wrqu->ap_addr.sa_data, 0, ETH_ALEN);
  	else
  		memcpy(wrqu->ap_addr.sa_data,
  		       ieee->current_network.bssid, ETH_ALEN);
  
  	spin_unlock_irqrestore(&ieee->lock, flags);
  
  	return 0;
  }
  
  
  int ieee80211_wx_set_wap(struct ieee80211_device *ieee,
  			 struct iw_request_info *info,
  			 union iwreq_data *awrq,
  			 char *extra)
  {
  
  	int ret = 0;
  	u8 zero[] = {0,0,0,0,0,0};
  	unsigned long flags;
  
  	short ifup = ieee->proto_started;//dev->flags & IFF_UP;
  	struct sockaddr *temp = (struct sockaddr *)awrq;
  
  	ieee->sync_scan_hurryup = 1;
  
  	down(&ieee->wx_sem);
  	/* use ifconfig hw ether */
  	if (ieee->iw_mode == IW_MODE_MASTER){
  		ret = -1;
  		goto out;
  	}
  
  	if (temp->sa_family != ARPHRD_ETHER){
  		ret = -EINVAL;
  		goto out;
  	}
  
  	if (ifup)
  		ieee80211_stop_protocol(ieee,true);
  
  	/* just to avoid to give inconsistent infos in the
  	 * get wx method. not really needed otherwise
  	 */
  	spin_lock_irqsave(&ieee->lock, flags);
  
  	memcpy(ieee->current_network.bssid, temp->sa_data, ETH_ALEN);
  	ieee->wap_set = memcmp(temp->sa_data, zero,ETH_ALEN)!=0;
  
  	spin_unlock_irqrestore(&ieee->lock, flags);
  
  	if (ifup)
  		ieee80211_start_protocol(ieee);
  out:
  	up(&ieee->wx_sem);
  	return ret;
  }
  
   int ieee80211_wx_get_essid(struct ieee80211_device *ieee, struct iw_request_info *a,union iwreq_data *wrqu,char *b)
  {
  	int len,ret = 0;
  	unsigned long flags;
  
  	if (ieee->iw_mode == IW_MODE_MONITOR)
  		return -1;
  
  	/* We want avoid to give to the user inconsistent infos*/
  	spin_lock_irqsave(&ieee->lock, flags);
  
  	if (ieee->current_network.ssid[0] == '\0' ||
  		ieee->current_network.ssid_len == 0){
  		ret = -1;
  		goto out;
  	}
  
  	if (ieee->state != IEEE80211_LINKED &&
  		ieee->state != IEEE80211_LINKED_SCANNING &&
  		ieee->ssid_set == 0){
  		ret = -1;
  		goto out;
  	}
  	len = ieee->current_network.ssid_len;
  	wrqu->essid.length = len;
  	strncpy(b,ieee->current_network.ssid,len);
  	wrqu->essid.flags = 1;
  
  out:
  	spin_unlock_irqrestore(&ieee->lock, flags);
  
  	return ret;
  
  }
  
  int ieee80211_wx_set_rate(struct ieee80211_device *ieee,
  			     struct iw_request_info *info,
  			     union iwreq_data *wrqu, char *extra)
  {
  
  	u32 target_rate = wrqu->bitrate.value;
  
  	ieee->rate = target_rate/100000;
  	return 0;
  }
  
  
  
  int ieee80211_wx_get_rate(struct ieee80211_device *ieee,
  			     struct iw_request_info *info,
  			     union iwreq_data *wrqu, char *extra)
  {
  	u32 tmp_rate;
  	tmp_rate = TxCountToDataRate(ieee, ieee->softmac_stats.CurrentShowTxate);
  	wrqu->bitrate.value = tmp_rate * 500000;
  
  	return 0;
  }
  
  
  int ieee80211_wx_set_rts(struct ieee80211_device *ieee,
  			     struct iw_request_info *info,
  			     union iwreq_data *wrqu, char *extra)
  {
  	if (wrqu->rts.disabled || !wrqu->rts.fixed)
  		ieee->rts = DEFAULT_RTS_THRESHOLD;
  	else
  	{
  		if (wrqu->rts.value < MIN_RTS_THRESHOLD ||
  				wrqu->rts.value > MAX_RTS_THRESHOLD)
  			return -EINVAL;
  		ieee->rts = wrqu->rts.value;
  	}
  	return 0;
  }
  
  int ieee80211_wx_get_rts(struct ieee80211_device *ieee,
  			     struct iw_request_info *info,
  			     union iwreq_data *wrqu, char *extra)
  {
  	wrqu->rts.value = ieee->rts;
  	wrqu->rts.fixed = 0;	/* no auto select */
  	wrqu->rts.disabled = (wrqu->rts.value == DEFAULT_RTS_THRESHOLD);
  	return 0;
  }
  int ieee80211_wx_set_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
  			     union iwreq_data *wrqu, char *b)
  {
  
  	ieee->sync_scan_hurryup = 1;
  
  	down(&ieee->wx_sem);
  
  	if (wrqu->mode == ieee->iw_mode)
  		goto out;
  
  	if (wrqu->mode == IW_MODE_MONITOR){
  
  		ieee->dev->type = ARPHRD_IEEE80211;
  	}else{
  		ieee->dev->type = ARPHRD_ETHER;
  	}
  
  	if (!ieee->proto_started){
  		ieee->iw_mode = wrqu->mode;
  	}else{
  		ieee80211_stop_protocol(ieee,true);
  		ieee->iw_mode = wrqu->mode;
  		ieee80211_start_protocol(ieee);
  	}
  
  out:
  	up(&ieee->wx_sem);
  	return 0;
  }
  
  void ieee80211_wx_sync_scan_wq(struct work_struct *work)
  {
          struct ieee80211_device *ieee = container_of(work, struct ieee80211_device, wx_sync_scan_wq);
  	short chan;
  	HT_EXTCHNL_OFFSET chan_offset=0;
  	HT_CHANNEL_WIDTH bandwidth=0;
  	int b40M = 0;
  	static int count = 0;
  	chan = ieee->current_network.channel;
  
  #ifdef ENABLE_LPS
  	if (ieee->LeisurePSLeave) {
  		ieee->LeisurePSLeave(ieee->dev);
  	}
  
  	/* notify AP to be in PS mode */
  	ieee80211_sta_ps_send_null_frame(ieee, 1);
  	ieee80211_sta_ps_send_null_frame(ieee, 1);
  #endif
  
  	if (ieee->data_hard_stop)
  		ieee->data_hard_stop(ieee->dev);
  
  	ieee80211_stop_send_beacons(ieee);
  
  	ieee->state = IEEE80211_LINKED_SCANNING;
  	ieee->link_change(ieee->dev);
  	ieee->InitialGainHandler(ieee->dev,IG_Backup);
  	if (ieee->pHTInfo->bCurrentHTSupport && ieee->pHTInfo->bEnableHT && ieee->pHTInfo->bCurBW40MHz) {
  		b40M = 1;
  		chan_offset = ieee->pHTInfo->CurSTAExtChnlOffset;
  		bandwidth = (HT_CHANNEL_WIDTH)ieee->pHTInfo->bCurBW40MHz;
  		printk("Scan in 40M, force to 20M first:%d, %d\n", chan_offset, bandwidth);
  		ieee->SetBWModeHandler(ieee->dev, HT_CHANNEL_WIDTH_20, HT_EXTCHNL_OFFSET_NO_EXT);
  		}
  	ieee80211_start_scan_syncro(ieee);
  	if (b40M) {
  		printk("Scan in 20M, back to 40M\n");
  		if (chan_offset == HT_EXTCHNL_OFFSET_UPPER)
  			ieee->set_chan(ieee->dev, chan + 2);
  		else if (chan_offset == HT_EXTCHNL_OFFSET_LOWER)
  			ieee->set_chan(ieee->dev, chan - 2);
  		else
  			ieee->set_chan(ieee->dev, chan);
  		ieee->SetBWModeHandler(ieee->dev, bandwidth, chan_offset);
  	} else {
  		ieee->set_chan(ieee->dev, chan);
  	}
  
  	ieee->InitialGainHandler(ieee->dev,IG_Restore);
  	ieee->state = IEEE80211_LINKED;
  	ieee->link_change(ieee->dev);
  
  #ifdef ENABLE_LPS
  	/* Notify AP that I wake up again */
  	ieee80211_sta_ps_send_null_frame(ieee, 0);
  #endif
  
  	// To prevent the immediately calling watch_dog after scan.
  	if(ieee->LinkDetectInfo.NumRecvBcnInPeriod==0||ieee->LinkDetectInfo.NumRecvDataInPeriod==0 )
  	{
  		ieee->LinkDetectInfo.NumRecvBcnInPeriod = 1;
  		ieee->LinkDetectInfo.NumRecvDataInPeriod= 1;
  	}
  	if (ieee->data_hard_resume)
  		ieee->data_hard_resume(ieee->dev);
  
  	if(ieee->iw_mode == IW_MODE_ADHOC || ieee->iw_mode == IW_MODE_MASTER)
  		ieee80211_start_send_beacons(ieee);
  
  	count = 0;
  	up(&ieee->wx_sem);
  
  }
  
  int ieee80211_wx_set_scan(struct ieee80211_device *ieee, struct iw_request_info *a,
  			     union iwreq_data *wrqu, char *b)
  {
  	int ret = 0;
  
  	down(&ieee->wx_sem);
  
  	if (ieee->iw_mode == IW_MODE_MONITOR || !(ieee->proto_started)){
  		ret = -1;
  		goto out;
  	}
  
  	if ( ieee->state == IEEE80211_LINKED){
  		queue_work(ieee->wq, &ieee->wx_sync_scan_wq);
  		/* intentionally forget to up sem */
  		return 0;
  	}
  
  out:
  	up(&ieee->wx_sem);
  	return ret;
  }
  
  int ieee80211_wx_set_essid(struct ieee80211_device *ieee,
  			      struct iw_request_info *a,
  			      union iwreq_data *wrqu, char *extra)
  {
  
  	int ret=0,len;
  	short proto_started;
  	unsigned long flags;
  
  	ieee->sync_scan_hurryup = 1;
  	down(&ieee->wx_sem);
  
  	proto_started = ieee->proto_started;
  
  	if (wrqu->essid.length > IW_ESSID_MAX_SIZE){
  		ret= -E2BIG;
  		goto out;
  	}
  
  	if (ieee->iw_mode == IW_MODE_MONITOR){
  		ret= -1;
  		goto out;
  	}
  
  	if(proto_started){
  		ieee80211_stop_protocol(ieee,true);
  	}
  
  
  	/* this is just to be sure that the GET wx callback
  	 * has consisten infos. not needed otherwise
  	 */
  	spin_lock_irqsave(&ieee->lock, flags);
  
  	if (wrqu->essid.flags && wrqu->essid.length) {
  		//first flush current network.ssid
  		len = ((wrqu->essid.length-1) < IW_ESSID_MAX_SIZE) ? (wrqu->essid.length-1) : IW_ESSID_MAX_SIZE;
  		strncpy(ieee->current_network.ssid, extra, len+1);
  		ieee->current_network.ssid_len = len+1;
  		ieee->ssid_set = 1;
  	}
  	else{
  		ieee->ssid_set = 0;
  		ieee->current_network.ssid[0] = '\0';
  		ieee->current_network.ssid_len = 0;
  	}
  	spin_unlock_irqrestore(&ieee->lock, flags);
  
  	if (proto_started)
  		ieee80211_start_protocol(ieee);
  out:
  	up(&ieee->wx_sem);
  	return ret;
  }
  
   int ieee80211_wx_get_mode(struct ieee80211_device *ieee, struct iw_request_info *a,
  			     union iwreq_data *wrqu, char *b)
  {
  
  	wrqu->mode = ieee->iw_mode;
  	return 0;
  }
  
   int ieee80211_wx_set_rawtx(struct ieee80211_device *ieee,
  			       struct iw_request_info *info,
  			       union iwreq_data *wrqu, char *extra)
  {
  
  	int *parms = (int *)extra;
  	int enable = (parms[0] > 0);
  	short prev = ieee->raw_tx;
  
  	down(&ieee->wx_sem);
  
  	if(enable)
  		ieee->raw_tx = 1;
  	else
  		ieee->raw_tx = 0;
  
  	printk(KERN_INFO"raw TX is %s\n",
  	      ieee->raw_tx ? "enabled" : "disabled");
  
  	if(ieee->iw_mode == IW_MODE_MONITOR)
  	{
  		if(prev == 0 && ieee->raw_tx){
  			if (ieee->data_hard_resume)
  				ieee->data_hard_resume(ieee->dev);
  
  			netif_carrier_on(ieee->dev);
  		}
  
  		if(prev && ieee->raw_tx == 1)
  			netif_carrier_off(ieee->dev);
  	}
  
  	up(&ieee->wx_sem);
  
  	return 0;
  }
  
  int ieee80211_wx_get_name(struct ieee80211_device *ieee,
  			     struct iw_request_info *info,
  			     union iwreq_data *wrqu, char *extra)
  {
  	strcpy(wrqu->name, "802.11");
  	if(ieee->modulation & IEEE80211_CCK_MODULATION)
  		strcat(wrqu->name, "b");
  	if(ieee->modulation & IEEE80211_OFDM_MODULATION)
  		strcat(wrqu->name, "g");
  	if (ieee->mode & (IEEE_N_24G | IEEE_N_5G))
  		strcat(wrqu->name, "n");
  	return 0;
  }
  
  
  /* this is mostly stolen from hostap */
  int ieee80211_wx_set_power(struct ieee80211_device *ieee,
  				 struct iw_request_info *info,
  				 union iwreq_data *wrqu, char *extra)
  {
  	int ret = 0;
  	if(
  		(!ieee->sta_wake_up) ||
  	//	(!ieee->ps_request_tx_ack) ||
  		(!ieee->enter_sleep_state) ||
  		(!ieee->ps_is_queue_empty)){
  
  	//	printk("ERROR. PS mode is tryied to be use but driver missed a callback\n\n");
  
  		return -1;
  	}
  	down(&ieee->wx_sem);
  
  	if (wrqu->power.disabled){
  		ieee->ps = IEEE80211_PS_DISABLED;
  		goto exit;
  	}
  	if (wrqu->power.flags & IW_POWER_TIMEOUT) {
  		//ieee->ps_period = wrqu->power.value / 1000;
  		ieee->ps_timeout = wrqu->power.value / 1000;
  	}
  
  	if (wrqu->power.flags & IW_POWER_PERIOD) {
  
  		//ieee->ps_timeout = wrqu->power.value / 1000;
  		ieee->ps_period = wrqu->power.value / 1000;
  		//wrq->value / 1024;
  
  	}
  	switch (wrqu->power.flags & IW_POWER_MODE) {
  	case IW_POWER_UNICAST_R:
  		ieee->ps = IEEE80211_PS_UNICAST;
  		break;
  	case IW_POWER_MULTICAST_R:
  		ieee->ps = IEEE80211_PS_MBCAST;
  		break;
  	case IW_POWER_ALL_R:
  		ieee->ps = IEEE80211_PS_UNICAST | IEEE80211_PS_MBCAST;
  		break;
  
  	case IW_POWER_ON:
  	//	ieee->ps = IEEE80211_PS_DISABLED;
  		break;
  
  	default:
  		ret = -EINVAL;
  		goto exit;
  
  	}
  exit:
  	up(&ieee->wx_sem);
  	return ret;
  
  }
  
  /* this is stolen from hostap */
  int ieee80211_wx_get_power(struct ieee80211_device *ieee,
  				 struct iw_request_info *info,
  				 union iwreq_data *wrqu, char *extra)
  {
  	int ret =0;
  
  	down(&ieee->wx_sem);
  
  	if(ieee->ps == IEEE80211_PS_DISABLED){
  		wrqu->power.disabled = 1;
  		goto exit;
  	}
  
  	wrqu->power.disabled = 0;
  
  	if ((wrqu->power.flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
  		wrqu->power.flags = IW_POWER_TIMEOUT;
  		wrqu->power.value = ieee->ps_timeout * 1000;
  	} else {
  //		ret = -EOPNOTSUPP;
  //		goto exit;
  		wrqu->power.flags = IW_POWER_PERIOD;
  		wrqu->power.value = ieee->ps_period * 1000;
  //ieee->current_network.dtim_period * ieee->current_network.beacon_interval * 1024;
  	}
  
         if ((ieee->ps & (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST)) == (IEEE80211_PS_MBCAST | IEEE80211_PS_UNICAST))
  	   	wrqu->power.flags |= IW_POWER_ALL_R;
  	else if (ieee->ps & IEEE80211_PS_MBCAST)
  		wrqu->power.flags |= IW_POWER_MULTICAST_R;
  	else
  		wrqu->power.flags |= IW_POWER_UNICAST_R;
  
  exit:
  	up(&ieee->wx_sem);
  	return ret;
  
  }
  