nl80211: Add BSS parameters to station

This allows user-space monitoring of BSS parameters for the associated
station.  This is useful for debugging and verifying that the paramaters
are as expected.

[Exactly the same as before but bundled into a single message]

Signed-off-by: Paul Stewart <pstew@chromium.org>
Cc: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

2 files changed, 68 insertions, 1 deletions

diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 3002218..16eea72 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1222,6 +1222,36 @@ enum nl80211_rate_info {
 };
 
 /**
+ * enum nl80211_sta_bss_param - BSS information collected by STA
+ *
+ * These attribute types are used with %NL80211_STA_INFO_BSS_PARAM
+ * when getting information about the bitrate of a station.
+ *
+ * @__NL80211_STA_BSS_PARAM_INVALID: attribute number 0 is reserved
+ * @NL80211_STA_BSS_PARAM_CTS_PROT: whether CTS protection is enabled (flag)
+ * @NL80211_STA_BSS_PARAM_SHORT_PREAMBLE:  whether short preamble is enabled
+ *	(flag)
+ * @NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME:  whether short slot time is enabled
+ *	(flag)
+ * @NL80211_STA_BSS_PARAM_DTIM_PERIOD: DTIM period for beaconing (u8)
+ * @NL80211_STA_BSS_PARAM_BEACON_INTERVAL: Beacon interval (u16)
+ * @NL80211_STA_BSS_PARAM_MAX: highest sta_bss_param number currently defined
+ * @__NL80211_STA_BSS_PARAM_AFTER_LAST: internal use
+ */
+enum nl80211_sta_bss_param {
+	__NL80211_STA_BSS_PARAM_INVALID,
+	NL80211_STA_BSS_PARAM_CTS_PROT,
+	NL80211_STA_BSS_PARAM_SHORT_PREAMBLE,
+	NL80211_STA_BSS_PARAM_SHORT_SLOT_TIME,
+	NL80211_STA_BSS_PARAM_DTIM_PERIOD,
+	NL80211_STA_BSS_PARAM_BEACON_INTERVAL,
+
+	/* keep last */
+	__NL80211_STA_BSS_PARAM_AFTER_LAST,
+	NL80211_STA_BSS_PARAM_MAX = __NL80211_STA_BSS_PARAM_AFTER_LAST - 1
+};
+
+/**
  * enum nl80211_sta_info - station information
  *
  * These attribute types are used with %NL80211_ATTR_STA_INFO
@@ -1233,7 +1263,7 @@ enum nl80211_rate_info {
  * @NL80211_STA_INFO_TX_BYTES: total transmitted bytes (u32, to this station)
  * @NL80211_STA_INFO_SIGNAL: signal strength of last received PPDU (u8, dBm)
  * @NL80211_STA_INFO_TX_BITRATE: current unicast tx rate, nested attribute
- * 	containing info as possible, see &enum nl80211_sta_info_txrate.
+ * 	containing info as possible, see &enum nl80211_rate_info
  * @NL80211_STA_INFO_RX_PACKETS: total received packet (u32, from this station)
  * @NL80211_STA_INFO_TX_PACKETS: total transmitted packets (u32, to this
  *	station)
@@ -1245,6 +1275,8 @@ enum nl80211_rate_info {
  * @NL80211_STA_INFO_PLINK_STATE: peer link state for the station
  * @NL80211_STA_INFO_RX_BITRATE: last unicast data frame rx rate, nested
  *	attribute, like NL80211_STA_INFO_TX_BITRATE.
+ * @NL80211_STA_INFO_BSS_PARAM: current station's view of BSS, nested attribute
+ *     containing info as possible, see &enum nl80211_sta_bss_param
  * @__NL80211_STA_INFO_AFTER_LAST: internal
  * @NL80211_STA_INFO_MAX: highest possible station info attribute
  */
@@ -1264,6 +1296,7 @@ enum nl80211_sta_info {
 	NL80211_STA_INFO_TX_FAILED,
 	NL80211_STA_INFO_SIGNAL_AVG,
 	NL80211_STA_INFO_RX_BITRATE,
+	NL80211_STA_INFO_BSS_PARAM,
 
 	/* keep last */
 	__NL80211_STA_INFO_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 2c45304..ba7384a 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -422,6 +422,7 @@ struct station_parameters {
  * @STATION_INFO_RX_DROP_MISC: @rx_dropped_misc filled
  * @STATION_INFO_SIGNAL_AVG: @signal_avg filled
  * @STATION_INFO_RX_BITRATE: @rxrate fields are filled
+ * @STATION_INFO_BSS_PARAM: @bss_param filled
  */
 enum station_info_flags {
 	STATION_INFO_INACTIVE_TIME	= 1<<0,
@@ -439,6 +440,7 @@ enum station_info_flags {
 	STATION_INFO_RX_DROP_MISC	= 1<<12,
 	STATION_INFO_SIGNAL_AVG		= 1<<13,
 	STATION_INFO_RX_BITRATE		= 1<<14,
+	STATION_INFO_BSS_PARAM          = 1<<15,
 };
 
 /**
@@ -473,6 +475,37 @@ struct rate_info {
 };
 
 /**
+ * enum station_info_rate_flags - bitrate info flags
+ *
+ * Used by the driver to indicate the specific rate transmission
+ * type for 802.11n transmissions.
+ *
+ * @BSS_PARAM_FLAGS_CTS_PROT: whether CTS protection is enabled
+ * @BSS_PARAM_FLAGS_SHORT_PREAMBLE: whether short preamble is enabled
+ * @BSS_PARAM_FLAGS_SHORT_SLOT_TIME: whether short slot time is enabled
+ */
+enum bss_param_flags {
+	BSS_PARAM_FLAGS_CTS_PROT	= 1<<0,
+	BSS_PARAM_FLAGS_SHORT_PREAMBLE	= 1<<1,
+	BSS_PARAM_FLAGS_SHORT_SLOT_TIME	= 1<<2,
+};
+
+/**
+ * struct sta_bss_parameters - BSS parameters for the attached station
+ *
+ * Information about the currently associated BSS
+ *
+ * @flags: bitflag of flags from &enum bss_param_flags
+ * @dtim_period: DTIM period for the BSS
+ * @beacon_interval: beacon interval
+ */
+struct sta_bss_parameters {
+	u8 flags;
+	u8 dtim_period;
+	u16 beacon_interval;
+};
+
+/**
  * struct station_info - station information
  *
  * Station information filled by driver for get_station() and dump_station.
@@ -515,6 +548,7 @@ struct station_info {
 	u32 tx_retries;
 	u32 tx_failed;
 	u32 rx_dropped_misc;
+	struct sta_bss_parameters bss_param;
 
 	int generation;
 };