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cfg80211/nl80211: Indicate roaming feature capability to userspace.

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When the rssi of the current AP drops, both wpa_supplicant and the
firmware may do a background scan to find a better AP and try to
associate. Since firmware based roaming is faster, inform
wpa_supplicant to avoid roaming and let the firmware decide to
roam if necessary.

For fullmac drivers like ath6kl, it is just enough to provide the
ESSID and the firmware will decide on the BSSID. Since it is not
possible to do pre-auth during roaming for fullmac drivers, the
wpa_supplicant needs to completely disconnect with the old AP and
reconnect with the new AP. This consumes lot of time and it is
better to leave the roaming decision to the firmware.

Signed-off-by: Vivek Natarajan <nataraja@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Vivek Natarajan
2011-08-29 14:23:03 +05:30
committed by John W. Linville
parent f0425beda4
commit f4b34b550a
3 changed files with 12 additions and 0 deletions
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3
include/net/cfg80211.h
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@@ -1619,6 +1619,8 @@ struct cfg80211_ops {
* @WIPHY_FLAG_MESH_AUTH: The device supports mesh authentication by routing
* auth frames to userspace. See @NL80211_MESH_SETUP_USERSPACE_AUTH.
* @WIPHY_FLAG_SUPPORTS_SCHED_SCAN: The device supports scheduled scans.
* @WIPHY_FLAG_SUPPORTS_FW_ROAM: The device supports roaming feature in the
* firmware.
*/
enum wiphy_flags {
WIPHY_FLAG_CUSTOM_REGULATORY = BIT(0),
@@ -1633,6 +1635,7 @@ enum wiphy_flags {
WIPHY_FLAG_MESH_AUTH = BIT(10),
WIPHY_FLAG_SUPPORTS_SCHED_SCAN = BIT(11),
WIPHY_FLAG_ENFORCE_COMBINATIONS = BIT(12),
WIPHY_FLAG_SUPPORTS_FW_ROAM = BIT(13),
};
/**