wpa_supplicant roaming not working with nl80211 driver

[Lin Ma]

Just curious why nobody cares the roaming? Does anyone meet this problem
before?

On Fri, Jan 14, 2011 at 9:08 PM, Lin Ma <linmaonly at gmail.com> wrote:

>  Hello Jouni and All,
>
>
>
> Current kernel cfg80211 framework seems to have a problem handling roaming.
> Upon scan event, wpa_supplicant will roam if a BSSID with better signal
> strength is found (in wpa_supplicant_need_to_roam). It calls
> wpa_supplicant_connect and eventually to kernel?s __cfg80211_connect.
> However  __cfg80211_connect check current status and returns -EALREADY if it
> is already connected
>
>
>
> In compat-linux/net/wireless/sme.c
>
>
>
> int __cfg80211_connect(struct cfg80211_registered_device *rdev,
>
>                                struct net_device *dev,
>
>                                struct cfg80211_connect_params *connect,
>
>                                struct cfg80211_cached_keys *connkeys,
>
>                                const u8 *prev_bssid)
>
> {
>
>             ?
>
>             if (wdev->sme_state != CFG80211_SME_IDLE)
>
>                         return ?EALREADY;
>
>
>
> The wpa_supplicant then goes into a loop in retrying association. NL80211
> has a NL80211_CMD_ROAM command but it is implemented yet. We can work around
> this by dissociating from previous AP but it not roaming..
>
>
>
> Anyone has a solution for this?
>
>
>
> Thanks,
>
> Lin
>
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