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authorVivek Natarajan <nataraja@qca.qualcomm.com>2011-08-29 14:23:03 +0530
committerJohn W. Linville <linville@tuxdriver.com>2011-09-13 15:42:31 -0400
commitf4b34b550a5428345f3794e62de48ad5a3db3954 (patch)
tree50d5c3b482bd018069fdde870f0c472808156070 /net/wireless
parentf0425beda4d404a6e751439b562100b902ba9c98 (diff)
cfg80211/nl80211: Indicate roaming feature capability to userspace.
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>
Diffstat (limited to 'net/wireless')
-rw-r--r--net/wireless/nl80211.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index bddb5595c65..ad13903c9b8 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -189,6 +189,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
.len = IEEE80211_MAX_DATA_LEN },
[NL80211_ATTR_IE_ASSOC_RESP] = { .type = NLA_BINARY,
.len = IEEE80211_MAX_DATA_LEN },
+ [NL80211_ATTR_ROAM_SUPPORT] = { .type = NLA_FLAG },
};
/* policy for the key attributes */
@@ -720,6 +721,9 @@ static int nl80211_send_wiphy(struct sk_buff *msg, u32 pid, u32 seq, int flags,
if (dev->wiphy.flags & WIPHY_FLAG_MESH_AUTH)
NLA_PUT_FLAG(msg, NL80211_ATTR_SUPPORT_MESH_AUTH);
+ if (dev->wiphy.flags & WIPHY_FLAG_SUPPORTS_FW_ROAM)
+ NLA_PUT_FLAG(msg, NL80211_ATTR_ROAM_SUPPORT);
+
NLA_PUT(msg, NL80211_ATTR_CIPHER_SUITES,
sizeof(u32) * dev->wiphy.n_cipher_suites,
dev->wiphy.cipher_suites);