[RFC 13/13] wpa_supplicant: Support minimum interval between scan attempts.

Jouni Malinen j at w1.fi
Sat Oct 22 14:47:22 EDT 2011


On Fri, Oct 14, 2011 at 03:34:37PM -0700, greearb at candelatech.com wrote:
> When running lots of vifs, they can all end up wanting to
> scan right after the other.  This leaves too little time for
> useful work to happen.  Allow users to configure a minimum
> timer interval (in seconds) between scans.  Default is zero,
> which is current behaviour.

Doing this in wpa_supplicant_req_scan() in this way is likely to cause
problems for various cases that depend on a quick scan, like P2P. I
understand that this is for special testing purposes, but this
configuration item would have unexpected behavior in some cases.

Do you know which wpa_supplicant_req_scan() call(s) are the most likely
once to hit the issues with large number of interfaces? It could be
nicer to modify one of those callers rather than enforcing this type of
strict minimum for all scan requests.

> +	wpa_s->last_scan_rx_sec = time(NULL);

Need to use os_get_time() instead of time().

-- 
Jouni Malinen                                            PGP id EFC895FA


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