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: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de>
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>

1 files changed, 51 insertions, 3 deletions

diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 071ed2395c9a..bae8614a450f 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -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_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);
+			  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
@@ -3480,11 +3500,26 @@ cfg80211_inform_bss_frame(struct wiphy *wiphy,
  * Or %NULL on error.
  */
 struct cfg80211_bss * __must_check
+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);
+		    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,
@@ -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