wpa_supplicant limitation with a large number of APs.
jkmaline at cc.hut.fi
Fri Feb 25 01:25:56 EST 2005
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
> (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.
> 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
> 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.
Jouni Malinen PGP id EFC895FA
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