Subject: channel selecting problem with athchans
Newsgroups: gmane.linux.drivers.madwifi.devel
Date: 2008-08-08 05:32:15 GMT (22 weeks and 23 hours ago)
i tested athchans command because i wanted to make my station device scans
only some specific channels.
but after i select channels using athchans command, station still scans some
other channels that i didn't set.
so i searched madwifi driver code and i think this parts are the reason of
problem.
in ieee80211_scan_sta.c
sta_start()
{
...
/*
* Add the channels from the ic (from HAL) that are not present
* in the staScanTable.
*/
for (i = 0; i < ic->ic_nchans; i++) {
c = &ic->ic_channels[i];
/*
* scan dynamic turbo channels in normal mode.
*/
if (IEEE80211_IS_CHAN_DTURBO(c))
continue;
mode = ieee80211_chan2mode(c);
if (vap->iv_des_mode != IEEE80211_MODE_AUTO) {
/*
* If a desired mode was specified, scan only
* channels that satisfy that constraint.
*/
if (vap->iv_des_mode != mode)
continue;
}
if (!checktable(staScanTable, c))
ss->ss_chans[ss->ss_last++] = c;
}
...
}
madwifi choose scan channel twice.
one from staScanTable.
second from hal (channels in hal but not in staScanTable).
during the fist process , station doesn't choose channels that are not active.
bur for the second, station doesn't care that channel is active or not.
i think this is the reason why my station still scan other channels i don't
want.
is it intented? or is there something wrong in my guess? or is it a bug?
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