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Commit ee688b00 authored by Johannes Berg's avatar Johannes Berg Committed by John W. Linville
Browse files

nl80211: export hardware bitrate/channel capabilities 



This makes nl80211 export the hardware bitrate/channel capabilities
as registered in a wiphy.

Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 8318d78a

include/linux/nl80211.h

+64 −0
Original line number Diff line number Diff line
@@ -161,6 +161,9 @@ enum nl80211_commands { 
 *	given for %NL80211_CMD_GET_STATION, nested attribute containing

 *	info as possible, see &enum nl80211_sta_stats.

 *

 * @NL80211_ATTR_WIPHY_BANDS: Information about an operating bands,

 *	consisting of a nested array.

 *

 * @NL80211_ATTR_MAX: highest attribute number currently defined

 * @__NL80211_ATTR_AFTER_LAST: internal use

 */
@@ -195,6 +198,8 @@ enum nl80211_attrs { 
	NL80211_ATTR_STA_VLAN,

	NL80211_ATTR_STA_STATS,



	NL80211_ATTR_WIPHY_BANDS,



	/* add attributes here, update the policy in nl80211.c */



	__NL80211_ATTR_AFTER_LAST,
@@ -280,4 +285,63 @@ enum nl80211_sta_stats { 
	NL80211_STA_STAT_MAX = __NL80211_STA_STAT_AFTER_LAST - 1

};



/**

 * enum nl80211_band_attr - band attributes

 * @__NL80211_BAND_ATTR_INVALID: attribute number 0 is reserved

 * @NL80211_BAND_ATTR_FREQS: supported frequencies in this band,

 *	an array of nested frequency attributes

 * @NL80211_BAND_ATTR_RATES: supported bitrates in this band,

 *	an array of nested bitrate attributes

 */

enum nl80211_band_attr {

	__NL80211_BAND_ATTR_INVALID,

	NL80211_BAND_ATTR_FREQS,

	NL80211_BAND_ATTR_RATES,



	/* keep last */

	__NL80211_BAND_ATTR_AFTER_LAST,

	NL80211_BAND_ATTR_MAX = __NL80211_BAND_ATTR_AFTER_LAST - 1

};



/**

 * enum nl80211_frequency_attr - frequency attributes

 * @NL80211_FREQUENCY_ATTR_FREQ: Frequency in MHz

 * @NL80211_FREQUENCY_ATTR_DISABLED: Channel is disabled in current

 *	regulatory domain.

 * @NL80211_FREQUENCY_ATTR_PASSIVE_SCAN: Only passive scanning is

 *	permitted on this channel in current regulatory domain.

 * @NL80211_FREQUENCY_ATTR_NO_IBSS: IBSS networks are not permitted

 *	on this channel in current regulatory domain.

 * @NL80211_FREQUENCY_ATTR_RADAR: Radar detection is mandatory

 *	on this channel in current regulatory domain.

 */

enum nl80211_frequency_attr {

	__NL80211_FREQUENCY_ATTR_INVALID,

	NL80211_FREQUENCY_ATTR_FREQ,

	NL80211_FREQUENCY_ATTR_DISABLED,

	NL80211_FREQUENCY_ATTR_PASSIVE_SCAN,

	NL80211_FREQUENCY_ATTR_NO_IBSS,

	NL80211_FREQUENCY_ATTR_RADAR,



	/* keep last */

	__NL80211_FREQUENCY_ATTR_AFTER_LAST,

	NL80211_FREQUENCY_ATTR_MAX = __NL80211_FREQUENCY_ATTR_AFTER_LAST - 1

};



/**

 * enum nl80211_bitrate_attr - bitrate attributes

 * @NL80211_BITRATE_ATTR_RATE: Bitrate in units of 100 kbps

 * @NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE: Short preamble supported

 *	in 2.4 GHz band.

 */

enum nl80211_bitrate_attr {

	__NL80211_BITRATE_ATTR_INVALID,

	NL80211_BITRATE_ATTR_RATE,

	NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE,



	/* keep last */

	__NL80211_BITRATE_ATTR_AFTER_LAST,

	NL80211_BITRATE_ATTR_MAX = __NL80211_BITRATE_ATTR_AFTER_LAST - 1

};



#endif /* __LINUX_NL80211_H */

net/wireless/nl80211.c

+74 −0
Original line number Diff line number Diff line
@@ -98,6 +98,13 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, 
			      struct cfg80211_registered_device *dev)

{

	void *hdr;

	struct nlattr *nl_bands, *nl_band;

	struct nlattr *nl_freqs, *nl_freq;

	struct nlattr *nl_rates, *nl_rate;

	enum ieee80211_band band;

	struct ieee80211_channel *chan;

	struct ieee80211_rate *rate;

	int i;



	hdr = nl80211hdr_put(msg, pid, seq, flags, NL80211_CMD_NEW_WIPHY);

	if (!hdr)
@@ -105,6 +112,73 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags, 


	NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, dev->idx);

	NLA_PUT_STRING(msg, NL80211_ATTR_WIPHY_NAME, wiphy_name(&dev->wiphy));



	nl_bands = nla_nest_start(msg, NL80211_ATTR_WIPHY_BANDS);

	if (!nl_bands)

		goto nla_put_failure;



	for (band = 0; band < IEEE80211_NUM_BANDS; band++) {

		if (!dev->wiphy.bands[band])

			continue;



		nl_band = nla_nest_start(msg, band);

		if (!nl_band)

			goto nla_put_failure;



		/* add frequencies */

		nl_freqs = nla_nest_start(msg, NL80211_BAND_ATTR_FREQS);

		if (!nl_freqs)

			goto nla_put_failure;



		for (i = 0; i < dev->wiphy.bands[band]->n_channels; i++) {

			nl_freq = nla_nest_start(msg, i);

			if (!nl_freq)

				goto nla_put_failure;



			chan = &dev->wiphy.bands[band]->channels[i];

			NLA_PUT_U32(msg, NL80211_FREQUENCY_ATTR_FREQ,

				    chan->center_freq);



			if (chan->flags & IEEE80211_CHAN_DISABLED)

				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_DISABLED);

			if (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)

				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_PASSIVE_SCAN);

			if (chan->flags & IEEE80211_CHAN_NO_IBSS)

				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_NO_IBSS);

			if (chan->flags & IEEE80211_CHAN_RADAR)

				NLA_PUT_FLAG(msg, NL80211_FREQUENCY_ATTR_RADAR);



			nla_nest_end(msg, nl_freq);

		}



		nla_nest_end(msg, nl_freqs);



		/* add bitrates */

		nl_rates = nla_nest_start(msg, NL80211_BAND_ATTR_RATES);

		if (!nl_rates)

			goto nla_put_failure;



		for (i = 0; i < dev->wiphy.bands[band]->n_bitrates; i++) {

			nl_rate = nla_nest_start(msg, i);

			if (!nl_rate)

				goto nla_put_failure;



			rate = &dev->wiphy.bands[band]->bitrates[i];

			NLA_PUT_U32(msg, NL80211_BITRATE_ATTR_RATE,

				    rate->bitrate);

			if (rate->flags & IEEE80211_RATE_SHORT_PREAMBLE)

				NLA_PUT_FLAG(msg,

					NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE);



			nla_nest_end(msg, nl_rate);

		}



		nla_nest_end(msg, nl_rates);



		nla_nest_end(msg, nl_band);

	}

	nla_nest_end(msg, nl_bands);



	return genlmsg_end(msg, hdr);



 nla_put_failure: