wpa_supplicant limitation with a large number of APs.

[YenJung Chang]

On Thu, 24 Feb 2005 22:25:56 -0800, Jouni Malinen <jkmaline at cc.hut.fi> wrote:
> On Fri, Feb 25, 2005 at 01:12:48PM +0800, YenJung Chang wrote:
> 
> > I said that the memory size of scanning result is 4096 is bcz the
> > variable "res_buf_len" in funcion wpa_driver_wext_get_scan_results in
> > driver_wext.c
> > (wpa_supplicant 0.3.8) is assigned IW_SCAN_MAX_DATA (4096).
> 
> That is the initial value, but it will be incremented up to 65536 bytes
> if the driver returns E2BIG.
I am using Madwifi.
It seems madwifi does not support this.
I will check it. Thanks. :)

> > And the max got number of AP is about 20 is the number I most saw when
> > wpa_supplicant ran.
> 
> Which driver are you using? I think I have seen much higher numbers, but
> this requires that the driver supports long scan results. Do you see
> more APs if you do a scan manually with 'iwlist <interface> scan'? The
> current hard limit on the wpa_supplicant side (SCAN_AP_LIMIT) is set to
> 128.
> 
> > I tried ap_scan=2 without security. Unfortunately, it failed.
> > Is there any restrication on ap_scan=2 ?
> 
> Yes, driver needs to support it and not all do.
In your memory, does madwifi support this?

There are some strange behavior when I set it. :S
However, thanks your reply. :)

> --
> Jouni Malinen                                            PGP id EFC895FA
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