wext.c

linux内核源码

   Infra 	     		    	B(4)	G(12)
   Adhoc 	      		    	B(4)	B(4)
 */
/**
 *  @brief Get Range Info
 *
 *  @param dev                  A pointer to net_device structure
 *  @param info			A pointer to iw_request_info structure
 *  @param vwrq 		A pointer to iw_param structure
 *  @param extra		A pointer to extra data buf
 *  @return 	   		0 --success, otherwise fail
 */
static int wlan_get_range(struct net_device *dev, struct iw_request_info *info,
			  struct iw_point *dwrq, char *extra)
{
	int i, j;
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	struct iw_range *range = (struct iw_range *)extra;
	struct chan_freq_power *cfp;
	u8 rates[MAX_RATES + 1];

	u8 flag = 0;

	lbs_deb_enter(LBS_DEB_WEXT);

	dwrq->length = sizeof(struct iw_range);
	memset(range, 0, sizeof(struct iw_range));

	range->min_nwid = 0;
	range->max_nwid = 0;

	memset(rates, 0, sizeof(rates));
	copy_active_data_rates(adapter, rates);
	range->num_bitrates = strnlen(rates, IW_MAX_BITRATES);
	for (i = 0; i < range->num_bitrates; i++)
		range->bitrate[i] = rates[i] * 500000;
	range->num_bitrates = i;
	lbs_deb_wext("IW_MAX_BITRATES %d, num_bitrates %d\n", IW_MAX_BITRATES,
	       range->num_bitrates);

	range->num_frequency = 0;
	if (priv->adapter->enable11d &&
	    adapter->connect_status == LIBERTAS_CONNECTED) {
		u8 chan_no;
		u8 band;

		struct parsed_region_chan_11d *parsed_region_chan =
		    &adapter->parsed_region_chan;

		if (parsed_region_chan == NULL) {
			lbs_deb_wext("11d: parsed_region_chan is NULL\n");
			goto out;
		}
		band = parsed_region_chan->band;
		lbs_deb_wext("band %d, nr_char %d\n", band,
		       parsed_region_chan->nr_chan);

		for (i = 0; (range->num_frequency < IW_MAX_FREQUENCIES)
		     && (i < parsed_region_chan->nr_chan); i++) {
			chan_no = parsed_region_chan->chanpwr[i].chan;
			lbs_deb_wext("chan_no %d\n", chan_no);
			range->freq[range->num_frequency].i = (long)chan_no;
			range->freq[range->num_frequency].m =
			    (long)libertas_chan_2_freq(chan_no, band) * 100000;
			range->freq[range->num_frequency].e = 1;
			range->num_frequency++;
		}
		flag = 1;
	}
	if (!flag) {
		for (j = 0; (range->num_frequency < IW_MAX_FREQUENCIES)
		     && (j < sizeof(adapter->region_channel)
			 / sizeof(adapter->region_channel[0])); j++) {
			cfp = adapter->region_channel[j].CFP;
			for (i = 0; (range->num_frequency < IW_MAX_FREQUENCIES)
			     && adapter->region_channel[j].valid
			     && cfp
			     && (i < adapter->region_channel[j].nrcfp); i++) {
				range->freq[range->num_frequency].i =
				    (long)cfp->channel;
				range->freq[range->num_frequency].m =
				    (long)cfp->freq * 100000;
				range->freq[range->num_frequency].e = 1;
				cfp++;
				range->num_frequency++;
			}
		}
	}

	lbs_deb_wext("IW_MAX_FREQUENCIES %d, num_frequency %d\n",
	       IW_MAX_FREQUENCIES, range->num_frequency);

	range->num_channels = range->num_frequency;

	sort_channels(&range->freq[0], range->num_frequency);

	/*
	 * Set an indication of the max TCP throughput in bit/s that we can
	 * expect using this interface
	 */
	if (i > 2)
		range->throughput = 5000 * 1000;
	else
		range->throughput = 1500 * 1000;

	range->min_rts = MRVDRV_RTS_MIN_VALUE;
	range->max_rts = MRVDRV_RTS_MAX_VALUE;
	range->min_frag = MRVDRV_FRAG_MIN_VALUE;
	range->max_frag = MRVDRV_FRAG_MAX_VALUE;

	range->encoding_size[0] = 5;
	range->encoding_size[1] = 13;
	range->num_encoding_sizes = 2;
	range->max_encoding_tokens = 4;

	range->min_pmp = 1000000;
	range->max_pmp = 120000000;
	range->min_pmt = 1000;
	range->max_pmt = 1000000;
	range->pmp_flags = IW_POWER_PERIOD;
	range->pmt_flags = IW_POWER_TIMEOUT;
	range->pm_capa = IW_POWER_PERIOD | IW_POWER_TIMEOUT | IW_POWER_ALL_R;

	/*
	 * Minimum version we recommend
	 */
	range->we_version_source = 15;

	/*
	 * Version we are compiled with
	 */
	range->we_version_compiled = WIRELESS_EXT;

	range->retry_capa = IW_RETRY_LIMIT;
	range->retry_flags = IW_RETRY_LIMIT | IW_RETRY_MAX;

	range->min_retry = TX_RETRY_MIN;
	range->max_retry = TX_RETRY_MAX;

	/*
	 * Set the qual, level and noise range values
	 */
	range->max_qual.qual = 100;
	range->max_qual.level = 0;
	range->max_qual.noise = 0;
	range->max_qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;

	range->avg_qual.qual = 70;
	/* TODO: Find real 'good' to 'bad' threshold value for RSSI */
	range->avg_qual.level = 0;
	range->avg_qual.noise = 0;
	range->avg_qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;

	range->sensitivity = 0;

	/*
	 * Setup the supported power level ranges
	 */
	memset(range->txpower, 0, sizeof(range->txpower));
	range->txpower[0] = 5;
	range->txpower[1] = 7;
	range->txpower[2] = 9;
	range->txpower[3] = 11;
	range->txpower[4] = 13;
	range->txpower[5] = 15;
	range->txpower[6] = 17;
	range->txpower[7] = 19;

	range->num_txpower = 8;
	range->txpower_capa = IW_TXPOW_DBM;
	range->txpower_capa |= IW_TXPOW_RANGE;

	range->event_capa[0] = (IW_EVENT_CAPA_K_0 |
				IW_EVENT_CAPA_MASK(SIOCGIWAP) |
				IW_EVENT_CAPA_MASK(SIOCGIWSCAN));
	range->event_capa[1] = IW_EVENT_CAPA_K_1;

	if (adapter->fwcapinfo & FW_CAPINFO_WPA) {
		range->enc_capa =   IW_ENC_CAPA_WPA
		                  | IW_ENC_CAPA_WPA2
		                  | IW_ENC_CAPA_CIPHER_TKIP
		                  | IW_ENC_CAPA_CIPHER_CCMP;
	}

out:
	lbs_deb_leave(LBS_DEB_WEXT);
	return 0;
}

static int wlan_set_power(struct net_device *dev, struct iw_request_info *info,
			  struct iw_param *vwrq, char *extra)
{
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;

	lbs_deb_enter(LBS_DEB_WEXT);

	/* PS is currently supported only in Infrastructure mode
	 * Remove this check if it is to be supported in IBSS mode also
	 */

	if (vwrq->disabled) {
		adapter->psmode = WLAN802_11POWERMODECAM;
		if (adapter->psstate != PS_STATE_FULL_POWER) {
			libertas_ps_wakeup(priv, CMD_OPTION_WAITFORRSP);
		}

		return 0;
	}

	if ((vwrq->flags & IW_POWER_TYPE) == IW_POWER_TIMEOUT) {
		lbs_deb_wext(
		       "setting power timeout is not supported\n");
		return -EINVAL;
	} else if ((vwrq->flags & IW_POWER_TYPE) == IW_POWER_PERIOD) {
		lbs_deb_wext("setting power period not supported\n");
		return -EINVAL;
	}

	if (adapter->psmode != WLAN802_11POWERMODECAM) {
		return 0;
	}

	adapter->psmode = WLAN802_11POWERMODEMAX_PSP;

	if (adapter->connect_status == LIBERTAS_CONNECTED) {
		libertas_ps_sleep(priv, CMD_OPTION_WAITFORRSP);
	}

	lbs_deb_leave(LBS_DEB_WEXT);
	return 0;
}

static int wlan_get_power(struct net_device *dev, struct iw_request_info *info,
			  struct iw_param *vwrq, char *extra)
{
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	int mode;

	lbs_deb_enter(LBS_DEB_WEXT);

	mode = adapter->psmode;

	if ((vwrq->disabled = (mode == WLAN802_11POWERMODECAM))
	    || adapter->connect_status == LIBERTAS_DISCONNECTED)
	{
		goto out;
	}

	vwrq->value = 0;

out:
	lbs_deb_leave(LBS_DEB_WEXT);
	return 0;
}

static struct iw_statistics *wlan_get_wireless_stats(struct net_device *dev)
{
	enum {
		POOR = 30,
		FAIR = 60,
		GOOD = 80,
		VERY_GOOD = 90,
		EXCELLENT = 95,
		PERFECT = 100
	};
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	u32 rssi_qual;
	u32 tx_qual;
	u32 quality = 0;
	int stats_valid = 0;
	u8 rssi;
	u32 tx_retries;

	lbs_deb_enter(LBS_DEB_WEXT);

	priv->wstats.status = adapter->mode;

	/* If we're not associated, all quality values are meaningless */
	if (adapter->connect_status != LIBERTAS_CONNECTED)
		goto out;

	/* Quality by RSSI */
	priv->wstats.qual.level =
	    CAL_RSSI(adapter->SNR[TYPE_BEACON][TYPE_NOAVG],
	     adapter->NF[TYPE_BEACON][TYPE_NOAVG]);

	if (adapter->NF[TYPE_BEACON][TYPE_NOAVG] == 0) {
		priv->wstats.qual.noise = MRVDRV_NF_DEFAULT_SCAN_VALUE;
	} else {
		priv->wstats.qual.noise =
		    CAL_NF(adapter->NF[TYPE_BEACON][TYPE_NOAVG]);
	}

	lbs_deb_wext("signal level %#x\n", priv->wstats.qual.level);
	lbs_deb_wext("noise %#x\n", priv->wstats.qual.noise);

	rssi = priv->wstats.qual.level - priv->wstats.qual.noise;
	if (rssi < 15)
		rssi_qual = rssi * POOR / 10;
	else if (rssi < 20)
		rssi_qual = (rssi - 15) * (FAIR - POOR) / 5 + POOR;
	else if (rssi < 30)
		rssi_qual = (rssi - 20) * (GOOD - FAIR) / 5 + FAIR;
	else if (rssi < 40)
		rssi_qual = (rssi - 30) * (VERY_GOOD - GOOD) /
		    10 + GOOD;
	else
		rssi_qual = (rssi - 40) * (PERFECT - VERY_GOOD) /
		    10 + VERY_GOOD;
	quality = rssi_qual;

	/* Quality by TX errors */
	priv->wstats.discard.retries = priv->stats.tx_errors;

	tx_retries = le32_to_cpu(adapter->logmsg.retry);

	if (tx_retries > 75)
		tx_qual = (90 - tx_retries) * POOR / 15;
	else if (tx_retries > 70)
		tx_qual = (75 - tx_retries) * (FAIR - POOR) / 5 + POOR;
	else if (tx_retries > 65)
		tx_qual = (70 - tx_retries) * (GOOD - FAIR) / 5 + FAIR;
	else if (tx_retries > 50)
		tx_qual = (65 - tx_retries) * (VERY_GOOD - GOOD) /
		    15 + GOOD;
	else
		tx_qual = (50 - tx_retries) *
		    (PERFECT - VERY_GOOD) / 50 + VERY_GOOD;
	quality = min(quality, tx_qual);

	priv->wstats.discard.code = le32_to_cpu(adapter->logmsg.wepundecryptable);
	priv->wstats.discard.fragment = le32_to_cpu(adapter->logmsg.rxfrag);
	priv->wstats.discard.retries = tx_retries;
	priv->wstats.discard.misc = le32_to_cpu(adapter->logmsg.ackfailure);

	/* Calculate quality */
	priv->wstats.qual.qual = min_t(u8, quality, 100);
	priv->wstats.qual.updated = IW_QUAL_ALL_UPDATED | IW_QUAL_DBM;
	stats_valid = 1;

	/* update stats asynchronously for future calls */
	libertas_prepare_and_send_command(priv, CMD_802_11_RSSI, 0,
					0, 0, NULL);
	libertas_prepare_and_send_command(priv, CMD_802_11_GET_LOG, 0,
					0, 0, NULL);
out:
	if (!stats_valid) {
		priv->wstats.miss.beacon = 0;
		priv->wstats.discard.retries = 0;
		priv->wstats.qual.qual = 0;
		priv->wstats.qual.level = 0;
		priv->wstats.qual.noise = 0;
		priv->wstats.qual.updated = IW_QUAL_ALL_UPDATED;
		priv->wstats.qual.updated |= IW_QUAL_NOISE_INVALID |
		    IW_QUAL_QUAL_INVALID | IW_QUAL_LEVEL_INVALID;
	}

	lbs_deb_leave(LBS_DEB_WEXT);
	return &priv->wstats;


}

static int wlan_set_freq(struct net_device *dev, struct iw_request_info *info,
		  struct iw_freq *fwrq, char *extra)
{
	int ret = -EINVAL;
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	struct chan_freq_power *cfp;
	struct assoc_request * assoc_req;

	lbs_deb_enter(LBS_DEB_WEXT);

	mutex_lock(&adapter->lock);
	assoc_req = wlan_get_association_request(adapter);
	if (!assoc_req) {
		ret = -ENOMEM;
		goto out;
	}

	/* If setting by frequency, convert to a channel */
	if (fwrq->e == 1) {
		long f = fwrq->m / 100000;

		cfp = find_cfp_by_band_and_freq(adapter, 0, f);
		if (!cfp) {
			lbs_deb_wext("invalid freq %ld\n", f);
			goto out;
		}

		fwrq->e = 0;
		fwrq->m = (int) cfp->channel;
	}

	/* Setting by channel number */
	if (fwrq->m > 1000 || fwrq->e > 0) {
		goto out;
	}

	cfp = libertas_find_cfp_by_band_and_channel(adapter, 0, fwrq->m);
	if (!cfp) {
		goto out;
	}

	assoc_req->channel = fwrq->m;
	ret = 0;

out:
	if (ret == 0) {
		set_bit(ASSOC_FLAG_CHANNEL, &assoc_req->flags);
		wlan_postpone_association_work(priv);
	} else {
		wlan_cancel_association_work(priv);
	}
	mutex_unlock(&adapter->lock);

	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
	return ret;
}

static int wlan_set_rate(struct net_device *dev, struct iw_request_info *info,
		  struct iw_param *vwrq, char *extra)
{
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	u32 new_rate;
	u16 action;
	int ret = -EINVAL;
	u8 rates[MAX_RATES + 1];

	lbs_deb_enter(LBS_DEB_WEXT);
	lbs_deb_wext("vwrq->value %d\n", vwrq->value);

	/* Auto rate? */
	if (vwrq->value == -1) {
		action = CMD_ACT_SET_TX_AUTO;
		adapter->auto_rate = 1;
		adapter->cur_rate = 0;
	} else {
		if (vwrq->value % 100000)
			goto out;

		memset(rates, 0, sizeof(rates));
		copy_active_data_rates(adapter, rates);
		new_rate = vwrq->value / 500000;
		if (!memchr(rates, new_rate, sizeof(rates))) {
			lbs_pr_alert("fixed data rate 0x%X out of range\n",
				new_rate);
			goto out;
		}

		adapter->cur_rate = new_rate;
		action = CMD_ACT_SET_TX_FIX_RATE;
		adapter->auto_rate = 0;
	}

	ret = libertas_prepare_and_send_command(priv, CMD_802_11_DATA_RATE,
				    action, CMD_OPTION_WAITFORRSP, 0, NULL);

out:
	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
	return ret;
}

static int wlan_get_rate(struct net_device *dev, struct iw_request_info *info,
		  struct iw_param *vwrq, char *extra)
{
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;

	lbs_deb_enter(LBS_DEB_WEXT);

	if (adapter->connect_status == LIBERTAS_CONNECTED) {
		vwrq->value = adapter->cur_rate * 500000;

		if (adapter->auto_rate)
			vwrq->fixed = 0;
		else
			vwrq->fixed = 1;

	} else {
		vwrq->fixed = 0;
		vwrq->value = 0;
	}

	lbs_deb_leave(LBS_DEB_WEXT);
	return 0;
}

static int wlan_set_mode(struct net_device *dev,
		  struct iw_request_info *info, u32 * uwrq, char *extra)
{
	int ret = 0;
	wlan_private *priv = dev->priv;
	wlan_adapter *adapter = priv->adapter;
	struct assoc_request * assoc_req;

	lbs_deb_enter(LBS_DEB_WEXT);

	if (   (*uwrq != IW_MODE_ADHOC)
	    && (*uwrq != IW_MODE_INFRA)
	    && (*uwrq != IW_MODE_AUTO)) {
		lbs_deb_wext("Invalid mode: 0x%x\n", *uwrq);
		ret = -EINVAL;
		goto out;
	}

	mutex_lock(&adapter->lock);
	assoc_req = wlan_get_association_request(adapter);
	if (!assoc_req) {
		ret = -ENOMEM;
		wlan_cancel_association_work(priv);
	} else {
		assoc_req->mode = *uwrq;
		set_bit(ASSOC_FLAG_MODE, &assoc_req->flags);
		wlan_postpone_association_work(priv);
		lbs_deb_wext("Switching to mode: 0x%x\n", *uwrq);
	}
	mutex_unlock(&adapter->lock);

out:
	lbs_deb_leave_args(LBS_DEB_WEXT, "ret %d", ret);
	return ret;
}


/**
 *  @brief Get Encryption key
 *
 *  @param dev                  A pointer to net_device structure
 *  @param info			A pointer to iw_request_info structure