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Commit dcd6eac1 authored by Simon Wunderlich's avatar Simon Wunderlich Committed by Johannes Berg
Browse files

nl80211: add scan width to bss and scan request structs 



To allow scanning and working with 5 MHz and 10 MHz BSS, extend the
inform bss commands and add wrappers to take 5 and 10 MHz bss into
account.

Signed-off-by: default avatarSimon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: default avatarMathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
parent be29b99a

include/net/cfg80211.h

+51 −3
Original line number Diff line number Diff line
@@ -1285,6 +1285,7 @@ struct cfg80211_ssid { 
 * @n_ssids: number of SSIDs

 * @channels: channels to scan on.

 * @n_channels: total number of channels to scan

 * @scan_width: channel width for scanning

 * @ie: optional information element(s) to add into Probe Request or %NULL

 * @ie_len: length of ie in octets

 * @flags: bit field of flags controlling operation
@@ -1300,6 +1301,7 @@ struct cfg80211_scan_request { 
	struct cfg80211_ssid *ssids;

	int n_ssids;

	u32 n_channels;

	enum nl80211_bss_scan_width scan_width;

	const u8 *ie;

	size_t ie_len;

	u32 flags;
@@ -1333,6 +1335,7 @@ struct cfg80211_match_set { 
 * @ssids: SSIDs to scan for (passed in the probe_reqs in active scans)

 * @n_ssids: number of SSIDs

 * @n_channels: total number of channels to scan

 * @scan_width: channel width for scanning

 * @interval: interval between each scheduled scan cycle

 * @ie: optional information element(s) to add into Probe Request or %NULL

 * @ie_len: length of ie in octets
@@ -1352,6 +1355,7 @@ struct cfg80211_sched_scan_request { 
	struct cfg80211_ssid *ssids;

	int n_ssids;

	u32 n_channels;

	enum nl80211_bss_scan_width scan_width;

	u32 interval;

	const u8 *ie;

	size_t ie_len;
@@ -1403,6 +1407,7 @@ struct cfg80211_bss_ies { 
 * for use in scan results and similar.

 *

 * @channel: channel this BSS is on

 * @scan_width: width of the control channel

 * @bssid: BSSID of the BSS

 * @beacon_interval: the beacon interval as from the frame

 * @capability: the capability field in host byte order
@@ -1424,6 +1429,7 @@ struct cfg80211_bss_ies { 
 */

struct cfg80211_bss {

	struct ieee80211_channel *channel;

	enum nl80211_bss_scan_width scan_width;



	const struct cfg80211_bss_ies __rcu *ies;

	const struct cfg80211_bss_ies __rcu *beacon_ies;
@@ -3438,10 +3444,11 @@ void cfg80211_sched_scan_results(struct wiphy *wiphy); 
void cfg80211_sched_scan_stopped(struct wiphy *wiphy);



/**

 * cfg80211_inform_bss_frame - inform cfg80211 of a received BSS frame

 * cfg80211_inform_bss_width_frame - inform cfg80211 of a received BSS frame

 *

 * @wiphy: the wiphy reporting the BSS

 * @channel: The channel the frame was received on

 * @scan_width: width of the control channel

 * @mgmt: the management frame (probe response or beacon)

 * @len: length of the management frame

 * @signal: the signal strength, type depends on the wiphy's signal_type
@@ -3454,16 +3461,29 @@ void cfg80211_sched_scan_stopped(struct wiphy *wiphy); 
 * Or %NULL on error.

 */

struct cfg80211_bss * __must_check

cfg80211_inform_bss_frame(struct wiphy *wiphy,

cfg80211_inform_bss_width_frame(struct wiphy *wiphy,

				struct ieee80211_channel *channel,

				enum nl80211_bss_scan_width scan_width,

				struct ieee80211_mgmt *mgmt, size_t len,

				s32 signal, gfp_t gfp);



static inline struct cfg80211_bss * __must_check

cfg80211_inform_bss_frame(struct wiphy *wiphy,

			  struct ieee80211_channel *channel,

			  struct ieee80211_mgmt *mgmt, size_t len,

			  s32 signal, gfp_t gfp)

{

	return cfg80211_inform_bss_width_frame(wiphy, channel,

					       NL80211_BSS_CHAN_WIDTH_20,

					       mgmt, len, signal, gfp);

}



/**

 * cfg80211_inform_bss - inform cfg80211 of a new BSS

 *

 * @wiphy: the wiphy reporting the BSS

 * @channel: The channel the frame was received on

 * @scan_width: width of the control channel

 * @bssid: the BSSID of the BSS

 * @tsf: the TSF sent by the peer in the beacon/probe response (or 0)

 * @capability: the capability field sent by the peer
@@ -3480,12 +3500,27 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, 
 * Or %NULL on error.

 */

struct cfg80211_bss * __must_check

cfg80211_inform_bss(struct wiphy *wiphy,

cfg80211_inform_bss_width(struct wiphy *wiphy,

			  struct ieee80211_channel *channel,

			  enum nl80211_bss_scan_width scan_width,

			  const u8 *bssid, u64 tsf, u16 capability,

			  u16 beacon_interval, const u8 *ie, size_t ielen,

			  s32 signal, gfp_t gfp);



static inline struct cfg80211_bss * __must_check

cfg80211_inform_bss(struct wiphy *wiphy,

		    struct ieee80211_channel *channel,

		    const u8 *bssid, u64 tsf, u16 capability,

		    u16 beacon_interval, const u8 *ie, size_t ielen,

		    s32 signal, gfp_t gfp)

{

	return cfg80211_inform_bss_width(wiphy, channel,

					 NL80211_BSS_CHAN_WIDTH_20,

					 bssid, tsf, capability,

					 beacon_interval, ie, ielen, signal,

					 gfp);

}



struct cfg80211_bss *cfg80211_get_bss(struct wiphy *wiphy,

				      struct ieee80211_channel *channel,

				      const u8 *bssid,
@@ -3530,6 +3565,19 @@ void cfg80211_put_bss(struct wiphy *wiphy, struct cfg80211_bss *bss); 
 */

void cfg80211_unlink_bss(struct wiphy *wiphy, struct cfg80211_bss *bss);



static inline enum nl80211_bss_scan_width

cfg80211_chandef_to_scan_width(const struct cfg80211_chan_def *chandef)

{

	switch (chandef->width) {

	case NL80211_CHAN_WIDTH_5:

		return NL80211_BSS_CHAN_WIDTH_5;

	case NL80211_CHAN_WIDTH_10:

		return NL80211_BSS_CHAN_WIDTH_10;

	default:

		return NL80211_BSS_CHAN_WIDTH_20;

	}

}



/**

 * cfg80211_rx_mlme_mgmt - notification of processed MLME management frame

 * @dev: network device

include/uapi/linux/nl80211.h

+18 −0
Original line number Diff line number Diff line
@@ -2807,6 +2807,21 @@ enum nl80211_chan_width { 
	NL80211_CHAN_WIDTH_10,

};



/**

 * enum nl80211_bss_scan_width - control channel width for a BSS

 *

 * These values are used with the %NL80211_BSS_CHAN_WIDTH attribute.

 *

 * @NL80211_BSS_CHAN_WIDTH_20: control channel is 20 MHz wide or compatible

 * @NL80211_BSS_CHAN_WIDTH_10: control channel is 10 MHz wide

 * @NL80211_BSS_CHAN_WIDTH_5: control channel is 5 MHz wide

 */

enum nl80211_bss_scan_width {

	NL80211_BSS_CHAN_WIDTH_20,

	NL80211_BSS_CHAN_WIDTH_10,

	NL80211_BSS_CHAN_WIDTH_5,

};



/**

 * enum nl80211_bss - netlink attributes for a BSS

 *
@@ -2831,6 +2846,8 @@ enum nl80211_chan_width { 
 * @NL80211_BSS_BEACON_IES: binary attribute containing the raw information

 *	elements from a Beacon frame (bin); not present if no Beacon frame has

 *	yet been received

 * @NL80211_BSS_CHAN_WIDTH: channel width of the control channel

 *	(u32, enum nl80211_bss_scan_width)

 * @__NL80211_BSS_AFTER_LAST: internal

 * @NL80211_BSS_MAX: highest BSS attribute

 */
@@ -2847,6 +2864,7 @@ enum nl80211_bss { 
	NL80211_BSS_STATUS,

	NL80211_BSS_SEEN_MS_AGO,

	NL80211_BSS_BEACON_IES,

	NL80211_BSS_CHAN_WIDTH,



	/* keep last */

	__NL80211_BSS_AFTER_LAST,

net/wireless/nl80211.c

+1 −0
Original line number Diff line number Diff line
@@ -5674,6 +5674,7 @@ static int nl80211_send_bss(struct sk_buff *msg, struct netlink_callback *cb, 
		goto nla_put_failure;

	if (nla_put_u16(msg, NL80211_BSS_CAPABILITY, res->capability) ||

	    nla_put_u32(msg, NL80211_BSS_FREQUENCY, res->channel->center_freq) ||

	    nla_put_u32(msg, NL80211_BSS_CHAN_WIDTH, res->scan_width) ||

	    nla_put_u32(msg, NL80211_BSS_SEEN_MS_AGO,

			jiffies_to_msecs(jiffies - intbss->ts)))

		goto nla_put_failure;

net/wireless/scan.c

+19 −12
Original line number Diff line number Diff line
@@ -651,6 +651,8 @@ static bool cfg80211_combine_bsses(struct cfg80211_registered_device *dev, 
			continue;

		if (bss->pub.channel != new->pub.channel)

			continue;

		if (bss->pub.scan_width != new->pub.scan_width)

			continue;

		if (rcu_access_pointer(bss->pub.beacon_ies))

			continue;

		ies = rcu_access_pointer(bss->pub.ies);
@@ -870,8 +872,9 @@ cfg80211_get_bss_channel(struct wiphy *wiphy, const u8 *ie, size_t ielen, 


/* Returned bss is reference counted and must be cleaned up appropriately. */

struct cfg80211_bss*

cfg80211_inform_bss(struct wiphy *wiphy,

cfg80211_inform_bss_width(struct wiphy *wiphy,

			  struct ieee80211_channel *channel,

			  enum nl80211_bss_scan_width scan_width,

			  const u8 *bssid, u64 tsf, u16 capability,

			  u16 beacon_interval, const u8 *ie, size_t ielen,

			  s32 signal, gfp_t gfp)
@@ -892,6 +895,7 @@ cfg80211_inform_bss(struct wiphy *wiphy, 


	memcpy(tmp.pub.bssid, bssid, ETH_ALEN);

	tmp.pub.channel = channel;

	tmp.pub.scan_width = scan_width;

	tmp.pub.signal = signal;

	tmp.pub.beacon_interval = beacon_interval;

	tmp.pub.capability = capability;
@@ -924,12 +928,13 @@ cfg80211_inform_bss(struct wiphy *wiphy, 
	/* cfg80211_bss_update gives us a referenced result */

	return &res->pub;

}

EXPORT_SYMBOL(cfg80211_inform_bss);

EXPORT_SYMBOL(cfg80211_inform_bss_width);



/* Returned bss is reference counted and must be cleaned up appropriately. */

struct cfg80211_bss *

cfg80211_inform_bss_frame(struct wiphy *wiphy,

cfg80211_inform_bss_width_frame(struct wiphy *wiphy,

				struct ieee80211_channel *channel,

				enum nl80211_bss_scan_width scan_width,

				struct ieee80211_mgmt *mgmt, size_t len,

				s32 signal, gfp_t gfp)

{
@@ -941,7 +946,8 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, 
	BUILD_BUG_ON(offsetof(struct ieee80211_mgmt, u.probe_resp.variable) !=

			offsetof(struct ieee80211_mgmt, u.beacon.variable));



	trace_cfg80211_inform_bss_frame(wiphy, channel, mgmt, len, signal);

	trace_cfg80211_inform_bss_width_frame(wiphy, channel, scan_width, mgmt,

					      len, signal);



	if (WARN_ON(!mgmt))

		return NULL;
@@ -976,6 +982,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, 
	

	memcpy(tmp.pub.bssid, mgmt->bssid, ETH_ALEN);

	tmp.pub.channel = channel;

	tmp.pub.scan_width = scan_width;

	tmp.pub.signal = signal;

	tmp.pub.beacon_interval = le16_to_cpu(mgmt->u.probe_resp.beacon_int);

	tmp.pub.capability = le16_to_cpu(mgmt->u.probe_resp.capab_info);
@@ -991,7 +998,7 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy, 
	/* cfg80211_bss_update gives us a referenced result */

	return &res->pub;

}

EXPORT_SYMBOL(cfg80211_inform_bss_frame);

EXPORT_SYMBOL(cfg80211_inform_bss_width_frame);



void cfg80211_ref_bss(struct wiphy *wiphy, struct cfg80211_bss *pub)

{

net/wireless/trace.h

+8 −4
Original line number Diff line number Diff line
@@ -2391,26 +2391,30 @@ TRACE_EVENT(cfg80211_get_bss, 
		  __entry->capa_mask, __entry->capa_val)

);



TRACE_EVENT(cfg80211_inform_bss_frame,

TRACE_EVENT(cfg80211_inform_bss_width_frame,

	TP_PROTO(struct wiphy *wiphy, struct ieee80211_channel *channel,

		 enum nl80211_bss_scan_width scan_width,

		 struct ieee80211_mgmt *mgmt, size_t len,

		 s32 signal),

	TP_ARGS(wiphy, channel, mgmt, len, signal),

	TP_ARGS(wiphy, channel, scan_width, mgmt, len, signal),

	TP_STRUCT__entry(

		WIPHY_ENTRY

		CHAN_ENTRY

		__field(enum nl80211_bss_scan_width, scan_width)

		__dynamic_array(u8, mgmt, len)

		__field(s32, signal)

	),

	TP_fast_assign(

		WIPHY_ASSIGN;

		CHAN_ASSIGN(channel);

		__entry->scan_width = scan_width;

		if (mgmt)

			memcpy(__get_dynamic_array(mgmt), mgmt, len);

		__entry->signal = signal;

	),

	TP_printk(WIPHY_PR_FMT ", " CHAN_PR_FMT "signal: %d",

		  WIPHY_PR_ARG, CHAN_PR_ARG, __entry->signal)

	TP_printk(WIPHY_PR_FMT ", " CHAN_PR_FMT "(scan_width: %d) signal: %d",

		  WIPHY_PR_ARG, CHAN_PR_ARG, __entry->scan_width,

		  __entry->signal)

);



DECLARE_EVENT_CLASS(cfg80211_bss_evt,