C++ ieee80211_channel_to_frequency函数代码示例

u32 rtw_ch2freq(u32 channel)
{
  if (channel <= 14) {
    return ieee80211_channel_to_frequency(channel, NL80211_BAND_2GHZ);
  } else {
    return ieee80211_channel_to_frequency(channel, NL80211_BAND_5GHZ);
  }
}

static int wlcore_smart_config_sync_event(struct wl1271 *wl, u8 sync_channel,
					  u8 sync_band)
{
	struct sk_buff *skb;
	enum ieee80211_band band;
	int freq;

	if (sync_band == WLCORE_BAND_5GHZ)
		band = IEEE80211_BAND_5GHZ;
	else
		band = IEEE80211_BAND_2GHZ;

	freq = ieee80211_channel_to_frequency(sync_channel, band);

	wl1271_debug(DEBUG_EVENT,
		     "SMART_CONFIG_SYNC_EVENT_ID, freq: %d (chan: %d band %d)",
		     freq, sync_channel, sync_band);
	skb = cfg80211_vendor_event_alloc(wl->hw->wiphy, NULL, 20,
					  WLCORE_VENDOR_EVENT_SC_SYNC,
					  GFP_KERNEL);

	if (nla_put_u32(skb, WLCORE_VENDOR_ATTR_FREQ, freq)) {
		kfree_skb(skb);
		return -EMSGSIZE;
	}
	cfg80211_vendor_event(skb, GFP_KERNEL);
	return 0;
}

/*
 * This function informs the CFG802.11 subsystem of a new IBSS.
 *
 * The following information are sent to the CFG802.11 subsystem
 * to register the new IBSS. If we do not register the new IBSS,
 * a kernel panic will result.
 *      - SSID
 *      - SSID length
 *      - BSSID
 *      - Channel
 */
static int mwifiex_cfg80211_inform_ibss_bss(struct mwifiex_private *priv)
{
	struct ieee80211_channel *chan;
	struct mwifiex_bss_info bss_info;
	struct cfg80211_bss *bss;
	int ie_len;
	u8 ie_buf[IEEE80211_MAX_SSID_LEN + sizeof(struct ieee_types_header)];
	enum ieee80211_band band;

	if (mwifiex_get_bss_info(priv, &bss_info))
		return -1;

	ie_buf[0] = WLAN_EID_SSID;
	ie_buf[1] = bss_info.ssid.ssid_len;

	memcpy(&ie_buf[sizeof(struct ieee_types_header)],
	       &bss_info.ssid.ssid, bss_info.ssid.ssid_len);
	ie_len = ie_buf[1] + sizeof(struct ieee_types_header);

	band = mwifiex_band_to_radio_type(priv->curr_bss_params.band);
	chan = __ieee80211_get_channel(priv->wdev->wiphy,
			ieee80211_channel_to_frequency(bss_info.bss_chan,
						       band));

	bss = cfg80211_inform_bss(priv->wdev->wiphy, chan,
				  bss_info.bssid, 0, WLAN_CAPABILITY_IBSS,
				  0, ie_buf, ie_len, 0, GFP_KERNEL);
	cfg80211_put_bss(bss);
	memcpy(priv->cfg_bssid, bss_info.bssid, ETH_ALEN);

	return 0;
}

static int ieee80211_ioctl_siwfreq(struct net_device *dev,
				   struct iw_request_info *info,
				   struct iw_freq *freq, char *extra)
{
	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);

	if (sdata->vif.type == NL80211_IFTYPE_STATION)
		sdata->u.sta.flags &= ~IEEE80211_STA_AUTO_CHANNEL_SEL;

	/* freq->e == 0: freq->m = channel; otherwise freq = m * 10^e */
	if (freq->e == 0) {
		if (freq->m < 0) {
			if (sdata->vif.type == NL80211_IFTYPE_STATION)
				sdata->u.sta.flags |=
					IEEE80211_STA_AUTO_CHANNEL_SEL;
			return 0;
		} else
			return ieee80211_set_freq(sdata,
				ieee80211_channel_to_frequency(freq->m));
	} else {
		int i, div = 1000000;
		for (i = 0; i < freq->e; i++)
			div /= 10;
		if (div > 0)
			return ieee80211_set_freq(sdata, freq->m / div);
		else
			return -EINVAL;
	}
}

static void wl1271_rx_status(struct wl1271 *wl,
			     struct wl1271_rx_descriptor *desc,
			     struct ieee80211_rx_status *status,
			     u8 beacon)
{
	memset(status, 0, sizeof(struct ieee80211_rx_status));

	status->band = wl->band;
	status->rate_idx = wl1271_rate_to_idx(wl, desc->rate);

	/*
	 * FIXME: Add mactime handling.  For IBSS (ad-hoc) we need to get the
	 * timestamp from the beacon (acx_tsf_info).  In BSS mode (infra) we
	 * only need the mactime for monitor mode.  For now the mactime is
	 * not valid, so RX_FLAG_TSFT should not be set
	 */
	status->signal = desc->rssi;

	status->freq = ieee80211_channel_to_frequency(desc->channel);

	if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {
		status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;

		if (likely(!(desc->status & WL1271_RX_DESC_DECRYPT_FAIL)))
			status->flag |= RX_FLAG_DECRYPTED;
		if (unlikely(desc->status & WL1271_RX_DESC_MIC_FAIL))
			status->flag |= RX_FLAG_MMIC_ERROR;
	}
}

/**
 * cfg80211_wext_freq - get wext frequency for non-"auto"
 * @wiphy: the wiphy
 * @freq: the wext freq encoding
 *
 * Returns a channel, %NULL for auto, or an ERR_PTR for errors!
 */
struct ieee80211_channel *cfg80211_wext_freq(struct wiphy *wiphy,
					     struct iw_freq *freq)
{
	struct ieee80211_channel *chan;
	int f;

	/*
	 * Parse frequency - return NULL for auto and
	 * -EINVAL for impossible things.
	 */
	if (freq->e == 0) {
		if (freq->m < 0)
			return NULL;
		f = ieee80211_channel_to_frequency(freq->m);
	} else {
		int i, div = 1000000;
		for (i = 0; i < freq->e; i++)
			div /= 10;
		if (div <= 0)
			return ERR_PTR(-EINVAL);
		f = freq->m / div;
	}

	/*
	 * Look up channel struct and return -EINVAL when
	 * it cannot be found.
	 */
	chan = ieee80211_get_channel(wiphy, f);
	if (!chan)
		return ERR_PTR(-EINVAL);
	return chan;
}

static void CFG80211_UpdateBssTableRssi(
	IN VOID							*pAdCB)
{

	PRTMP_ADAPTER pAd = (PRTMP_ADAPTER)pAdCB;
	CFG80211_CB *pCfg80211_CB  = (CFG80211_CB *)pAd->pCfg80211_CB;
	struct wiphy *pWiphy = pCfg80211_CB->pCfg80211_Wdev->wiphy;
	struct ieee80211_channel *chan;
	struct cfg80211_bss *bss;
	BSS_ENTRY *pBssEntry;
	UINT index;
	UINT32 CenFreq;
	
	for (index = 0; index < pAd->ScanTab.BssNr; index++) 
	{
		pBssEntry = &pAd->ScanTab.BssEntry[index];
			
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,39)) 
		if (pAd->ScanTab.BssEntry[index].Channel > 14) 
			CenFreq = ieee80211_channel_to_frequency(pAd->ScanTab.BssEntry[index].Channel , IEEE80211_BAND_5GHZ);
		else 
			CenFreq = ieee80211_channel_to_frequency(pAd->ScanTab.BssEntry[index].Channel , IEEE80211_BAND_2GHZ);
#else
		CenFreq = ieee80211_channel_to_frequency(pAd->ScanTab.BssEntry[index].Channel);
#endif

		chan = ieee80211_get_channel(pWiphy, CenFreq);			
		bss = cfg80211_get_bss(pWiphy, chan, pBssEntry->Bssid, pBssEntry->Ssid, pBssEntry->SsidLen, 
						WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
		if (bss == NULL)
		{
			/* ScanTable Entry not exist in kernel buffer */
		}
		else
		{
			/* HIT */
			CFG80211_CalBssAvgRssi(pBssEntry);
			bss->signal = pBssEntry->AvgRssi * 100; //UNIT: MdBm
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(3,9,0))
			cfg80211_put_bss(pWiphy, bss);
#else
			cfg80211_put_bss(bss);
#endif /* LINUX_VERSION_CODE: 3.9.0 */
		}
	}	
}

static void rt2x00lib_channel(struct ieee80211_channel *entry,
			      const int channel, const int tx_power,
			      const int value)
{
	entry->center_freq = ieee80211_channel_to_frequency(channel);
	entry->hw_value = value;
	entry->max_power = tx_power;
	entry->max_antenna_gain = 0xff;
}

static void wl1251_rx_status(struct wl1251 *wl,
                             struct wl1251_rx_descriptor *desc,
                             struct ieee80211_rx_status *status,
                             u8 beacon)
{
    u64 mactime;
    int ret;

    memset(status, 0, sizeof(struct ieee80211_rx_status));

    status->band = IEEE80211_BAND_2GHZ;
    status->mactime = desc->timestamp;

    /*
     * The rx status timestamp is a 32 bits value while the TSF is a
     * 64 bits one.
     * For IBSS merging, TSF is mandatory, so we have to get it
     * somehow, so we ask for ACX_TSF_INFO.
     * That could be moved to the get_tsf() hook, but unfortunately,
     * this one must be atomic, while our SPI routines can sleep.
     */
    if ((wl->bss_type == BSS_TYPE_IBSS) && beacon) {
        ret = wl1251_acx_tsf_info(wl, &mactime);
        if (ret == 0)
            status->mactime = mactime;
    }

    status->signal = desc->rssi;

    /*
     * FIXME: guessing that snr needs to be divided by two, otherwise
     * the values don't make any sense
     */
    wl->noise = desc->rssi - desc->snr / 2;

    status->freq = ieee80211_channel_to_frequency(desc->channel,
                   status->band);

    status->flag |= RX_FLAG_MACTIME_MPDU;

    if (desc->flags & RX_DESC_ENCRYPTION_MASK) {
        status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;

        if (likely(!(desc->flags & RX_DESC_DECRYPT_FAIL)))
            status->flag |= RX_FLAG_DECRYPTED;

        if (unlikely(desc->flags & RX_DESC_MIC_FAIL))
            status->flag |= RX_FLAG_MMIC_ERROR;
    }

    if (unlikely(!(desc->flags & RX_DESC_VALID_FCS)))
        status->flag |= RX_FLAG_FAILED_FCS_CRC;


    /* FIXME: set status->rate_idx */
}

static void wl1271_rx_status(struct wl1271 *wl,
			     struct wl1271_rx_descriptor *desc,
			     struct ieee80211_rx_status *status,
			     u8 beacon)
{
	memset(status, 0, sizeof(struct ieee80211_rx_status));

	if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG)
		status->band = IEEE80211_BAND_2GHZ;
	else
		status->band = IEEE80211_BAND_5GHZ;

	status->rate_idx = wlcore_rate_to_idx(wl, desc->rate, status->band);

	/* 11n support */
	if (desc->rate <= wl->hw_min_ht_rate)
		status->flag |= RX_FLAG_HT;

	/*
	 * Read the signal level and antenna diversity indication.
	 * The msb in the signal level is always set as it is a
	 * negative number.
	 * The antenna indication is the msb of the rssi.
	 */

	status->signal = ((desc->rssi & RSSI_LEVEL_BITMASK) | BIT(7));
	status->antenna = ((desc->rssi & ANT_DIVERSITY_BITMASK) >> 7);

	/*
	 * FIXME: In wl1251, the SNR should be divided by two.  In wl1271 we
	 * need to divide by two for now, but TI has been discussing about
	 * changing it.  This needs to be rechecked.
	 */
	wl->noise = desc->rssi - (desc->snr >> 1);

	status->freq = ieee80211_channel_to_frequency(desc->channel,
						      status->band);

	if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {
		u8 desc_err_code = desc->status & WL1271_RX_DESC_STATUS_MASK;

		status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED |
				RX_FLAG_DECRYPTED;

		if (unlikely(desc_err_code & WL1271_RX_DESC_MIC_FAIL)) {
			status->flag |= RX_FLAG_MMIC_ERROR;
			wl1271_warning("Michael MIC error. Desc: 0x%x",
				       desc_err_code);
		}
	}

	if (beacon)
		wlcore_set_pending_regdomain_ch(wl, (u16)desc->channel,
						status->band);
}

static void rt2x00lib_channel(struct ieee80211_channel *entry,
			      const int channel, const int tx_power,
			      const int value)
{
	/* XXX: this assumption about the band is wrong for 802.11j */
	entry->band = channel <= 14 ? IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
	entry->center_freq = ieee80211_channel_to_frequency(channel,
							    entry->band);
	entry->hw_value = value;
	entry->max_power = tx_power;
	entry->max_antenna_gain = 0xff;
}

static void CFG80211_UpdateBssTableRssi(
	IN struct rtmp_adapter			*pAd)
{

	struct mt7612u_cfg80211_cb *pCfg80211_CB  = (struct mt7612u_cfg80211_cb *)pAd->pCfg80211_CB;
	struct wiphy *pWiphy = pCfg80211_CB->pCfg80211_Wdev->wiphy;
	struct ieee80211_channel *chan;
	struct cfg80211_bss *bss;
	BSS_ENTRY *pBssEntry;
	UINT index;
	uint32_t CenFreq;

	for (index = 0; index < pAd->ScanTab.BssNr; index++)
	{
		pBssEntry = &pAd->ScanTab.BssEntry[index];

		if (pAd->ScanTab.BssEntry[index].Channel > 14)
			CenFreq = ieee80211_channel_to_frequency(pAd->ScanTab.BssEntry[index].Channel , NL80211_BAND_5GHZ);
		else
			CenFreq = ieee80211_channel_to_frequency(pAd->ScanTab.BssEntry[index].Channel , NL80211_BAND_2GHZ);

		chan = ieee80211_get_channel(pWiphy, CenFreq);
		bss = cfg80211_get_bss(pWiphy, chan, pBssEntry->Bssid, pBssEntry->Ssid, pBssEntry->SsidLen,
						WLAN_CAPABILITY_ESS, WLAN_CAPABILITY_ESS);
		if (bss == NULL)
		{
			/* ScanTable Entry not exist in kernel buffer */
		}
		else
		{
			/* HIT */
			CFG80211_CalBssAvgRssi(pBssEntry);
			bss->signal = pBssEntry->AvgRssi * 100; //UNIT: MdBm
			cfg80211_put_bss(pWiphy, bss);
		}
	}
}

static void wl1271_rx_status(struct wl1271 *wl,
			     struct wl1271_rx_descriptor *desc,
			     struct ieee80211_rx_status *status,
			     u8 beacon)
{
	memset(status, 0, sizeof(struct ieee80211_rx_status));

	if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG)
		status->band = IEEE80211_BAND_2GHZ;
	else
		status->band = IEEE80211_BAND_5GHZ;

	status->rate_idx = wlcore_rate_to_idx(wl, desc->rate, status->band);

	/* 11n support */
	if (desc->rate <= wl->hw_min_ht_rate)
		status->flag |= RX_FLAG_HT;

	status->signal = desc->rssi;

	/*
	 * FIXME: In wl1251, the SNR should be divided by two.  In wl1271 we
	 * need to divide by two for now, but TI has been discussing about
	 * changing it.  This needs to be rechecked.
	 */
	wl->noise = desc->rssi - (desc->snr >> 1);

	status->freq = ieee80211_channel_to_frequency(desc->channel,
						      status->band);

	if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {
		u8 desc_err_code = desc->status & WL1271_RX_DESC_STATUS_MASK;

		status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED |
				RX_FLAG_DECRYPTED;

		if (unlikely(desc_err_code & WL1271_RX_DESC_MIC_FAIL)) {
			status->flag |= RX_FLAG_MMIC_ERROR;
			wl1271_warning("Michael MIC error. Desc: 0x%x",
				       desc_err_code);
		}
	}

	if (beacon)
		wlcore_set_pending_regdomain_ch(wl, (u16)desc->channel,
						status->band);
}

int cfg80211_wext_freq(struct wiphy *wiphy, struct iw_freq *freq)
{
	if (freq->e == 0) {
		enum ieee80211_band band = IEEE80211_BAND_2GHZ;
		if (freq->m < 0)
			return 0;
		if (freq->m > 14)
			band = IEEE80211_BAND_5GHZ;
		return ieee80211_channel_to_frequency(freq->m, band);
	} else {
		int i, div = 1000000;
		for (i = 0; i < freq->e; i++)
			div /= 10;
		if (div <= 0)
			return -EINVAL;
		return freq->m / div;
	}
}

static void wl1271_rx_status(struct wl1271 *wl,
			     struct wl1271_rx_descriptor *desc,
			     struct ieee80211_rx_status *status,
			     u8 beacon)
{
	enum ieee80211_band desc_band;

	memset(status, 0, sizeof(struct ieee80211_rx_status));

	status->band = wl->band;

	if ((desc->flags & WL1271_RX_DESC_BAND_MASK) == WL1271_RX_DESC_BAND_BG)
		desc_band = IEEE80211_BAND_2GHZ;
	else
		desc_band = IEEE80211_BAND_5GHZ;

	status->rate_idx = wl1271_rate_to_idx(desc->rate, desc_band);

#ifdef CONFIG_WL12XX_HT
	/* 11n support */
	if (desc->rate <= CONF_HW_RXTX_RATE_MCS0)
		status->flag |= RX_FLAG_HT;
#endif

	status->signal = desc->rssi;

	/*
	 * FIXME: In wl1251, the SNR should be divided by two.  In wl1271 we
	 * need to divide by two for now, but TI has been discussing about
	 * changing it.  This needs to be rechecked.
	 */
	wl->noise = desc->rssi - (desc->snr >> 1);

	status->freq = ieee80211_channel_to_frequency(desc->channel, desc_band);

	if (desc->flags & WL1271_RX_DESC_ENCRYPT_MASK) {
		status->flag |= RX_FLAG_IV_STRIPPED | RX_FLAG_MMIC_STRIPPED;

		if (likely(!(desc->status & WL1271_RX_DESC_DECRYPT_FAIL)))
			status->flag |= RX_FLAG_DECRYPTED;
		if (unlikely(desc->status & WL1271_RX_DESC_MIC_FAIL))
			status->flag |= RX_FLAG_MMIC_ERROR;
	}
}