nl80211/cfg80211: add match filtering for sched_scan
Introduce filtering for scheduled scans to reduce the number of
unnecessary results (which cause useless wake-ups).
Add a new nested attribute where sets of parameters to be matched can
be passed when starting a scheduled scan. Only scan results that
match any of the sets will be returned.
At this point, the set consists of a single parameter, an SSID. This
can be easily extended in the future to support more complex matches.
Signed-off-by: Luciano Coelho <coelho@ti.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 01c6bde..09024ab 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -876,6 +876,15 @@
};
/**
+ * struct cfg80211_match_set - sets of attributes to match
+ *
+ * @ssid: SSID to be matched
+ */
+struct cfg80211_match_set {
+ struct cfg80211_ssid ssid;
+};
+
+/**
* struct cfg80211_sched_scan_request - scheduled scan request description
*
* @ssids: SSIDs to scan for (passed in the probe_reqs in active scans)
@@ -884,6 +893,11 @@
* @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
+ * @match_sets: sets of parameters to be matched for a scan result
+ * entry to be considered valid and to be passed to the host
+ * (others are filtered out).
+ * If ommited, all results are passed.
+ * @n_match_sets: number of match sets
* @wiphy: the wiphy this was for
* @dev: the interface
* @channels: channels to scan
@@ -895,6 +909,8 @@
u32 interval;
const u8 *ie;
size_t ie_len;
+ struct cfg80211_match_set *match_sets;
+ int n_match_sets;
/* internal */
struct wiphy *wiphy;
@@ -1814,6 +1830,9 @@
* any given scan
* @max_sched_scan_ssids: maximum number of SSIDs the device can scan
* for in any given scheduled scan
+ * @max_match_sets: maximum number of match sets the device can handle
+ * when performing a scheduled scan, 0 if filtering is not
+ * supported.
* @max_scan_ie_len: maximum length of user-controlled IEs device can
* add to probe request frames transmitted during a scan, must not
* include fixed IEs like supported rates
@@ -1871,6 +1890,7 @@
int bss_priv_size;
u8 max_scan_ssids;
u8 max_sched_scan_ssids;
+ u8 max_match_sets;
u16 max_scan_ie_len;
u16 max_sched_scan_ie_len;