introduce WEXT scan capabilities
Introduce scan capabilities to WEXT so that userspace can do intelligent
things with scan behavior such as handling hidden SSIDs more gracefully.
If the driver reports a specific scan capability, the driver must
respect the options specified in the iw_scan_req structure when handling
the SIOCSIWSCAN call, unless it's mode or state does not allow it to do
so, in which case it must return an error.
This version switches to Dave Kilroy's suggestion of claiming unused
padding space for the scan_capa field.
Signed-off-by: Dan Williams <dcbw@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/wireless.h b/include/linux/wireless.h
index 0987aa7..74e84ca 100644
--- a/include/linux/wireless.h
+++ b/include/linux/wireless.h
@@ -541,6 +541,16 @@
/* Maximum size of returned data */
#define IW_SCAN_MAX_DATA 4096 /* In bytes */
+/* Scan capability flags - in (struct iw_range *)->scan_capa */
+#define IW_SCAN_CAPA_NONE 0x00
+#define IW_SCAN_CAPA_ESSID 0x01
+#define IW_SCAN_CAPA_BSSID 0x02
+#define IW_SCAN_CAPA_CHANNEL 0x04
+#define IW_SCAN_CAPA_MODE 0x08
+#define IW_SCAN_CAPA_RATE 0x10
+#define IW_SCAN_CAPA_TYPE 0x20
+#define IW_SCAN_CAPA_TIME 0x40
+
/* Max number of char in custom event - use multiple of them if needed */
#define IW_CUSTOM_MAX 256 /* In bytes */
@@ -963,6 +973,9 @@
__u16 old_num_channels;
__u8 old_num_frequency;
+ /* Scan capabilities */
+ __u8 scan_capa; /* IW_SCAN_CAPA_* bit field */
+
/* Wireless event capability bitmasks */
__u32 event_capa[6];