hi guys,
I'have configured a laptop with Centos 6.3 as an AP with hostapd.
The kernel is compiled from vanilla 3.6.3, no taints.
iw is compiled from source (version 3.7).
hostapd is compiled from source (version 1.0).
The AP wifi card is an embedded AR2425 (I think mini pci-e).
Playing with network scripts I found a strange behavior of my wlan0.
If I bring up the system and through the network scripts I end up with
a wlan0 with power_save mode off then I'm able to associate to the AP.
If through the network scripts I end up with a wlan with power_save
mode on then I'm unable to associate to the AP.
This sounds right. AFAIK the AP should never use power_save so
I just have to make sure this is off.
What I found strange is that with iw or iwconfig I can't change the
power_save mode. Once modprobed the ath5k module the power_save
is on by default. If I put the wlan in ibss and brink up a link with ip
the power_save stay on. If I put the wlan0 in managed and bring up a
link with ip then the power_save switch to off. Once off I didn't find
a way to change it to on again.
As iw and iwconfig always report error on change:
command failed: Operation not supported (-95)
I suppose the NIC does not support power_save but then:
shouldn't the NIC come up with power_save disabled by default?
And in case the value reported from iw after modprobe is wrong
I think there is something not ok since the status reported actually
make difference to hostapd.
I post here a script and it's output to make thinks a little clearer:
# cat verifica.sh
#!/bin/bash
linkdown() {
echo ip link set wlan0 down
ip link set wlan0 down
echo
}
rmath5k() {
echo modprobe -r ath5k
modprobe -r ath5k
echo
}
insath5k() {
echo modprobe ath5k
modprobe ath5k
echo
}
checkpm() {
echo iw dev wlan0 get power_save
iw dev wlan0 get power_save
echo
}
info() {
echo iw dev wlan0 info
iw dev wlan0 info
echo
}
ibss() {
echo iw dev wlan0 set type ibss
iw dev wlan0 set type ibss
echo
}
linkup() {
echo ip link set wlan0 up
ip link set wlan0 up
echo
}
managed() {
echo iw dev wlan0 set type managed
iw dev wlan0 set type managed
echo
}
linkdown
rmath5k
insath5k
info
ibss
linkup
checkpm
linkdown
managed
linkup
checkpm
linkdown
ibss
linkup
checkpm
[root@pack ~]#
[root@pack ~]#
[root@pack ~]# ./verifica.sh
ip link set wlan0 down
modprobe -r ath5k
modprobe ath5k
iw dev wlan0 info
Interface wlan0
ifindex 33
wdev 0x1
addr 00:15:af:4e:ae:15
type managed
wiphy 0
channel 1 (2412 MHz) NO HT
iw dev wlan0 set type ibss
ip link set wlan0 up
iw dev wlan0 get power_save
Power save: on
ip link set wlan0 down
iw dev wlan0 set type managed
ip link set wlan0 up
iw dev wlan0 get power_save
Power save: off
ip link set wlan0 down
iw dev wlan0 set type ibss
ip link set wlan0 up
iw dev wlan0 get power_save
Power save: off
_______________________________________________
ath5k-devel mailing list
ath5k-devel@lists.ath5k.org
https://lists.ath5k.org/mailman/listinfo/ath5k-devel
