WIFI Connector Application

Matthias Apitz guru at unixarea.de
Fri Sep 26 11:18:43 CEST 2008 

El día Thursday, September 25, 2008 a las 08:02:18PM +0100, Al Johnson escribió:

> > I think the work that wpa_supplicant daemon does is only to control the
> > association to the AP and bringing up the interface; then in FreeBSD
> > a devd (device daemon) lets you describe what to do else, for example
> > launch a script when IF_UP; in this script you may, based on the MAC of
> > the AP, do whatever is needed: ifconfig static IP or DHCP or ....
> >
> > it is similiar to what I have described here for the cdce0 (USB) interface:
> >
> > http://wiki.openmoko.org/wiki/Usb_networking#FreeBSD
> >
> > a logic like that must exist in Debian too, I'm wrong?
> > and this is not much scripting work, or?
> 
> Exactly. The logic exists in debian. wpa_supplicant associates with the access 
> point then some scripts apply the configuration you set 
> in /etc/network/interfaces that matches the AP it associated with. 
> Unfortunately in 2007.2 the bit that applies the settings is missing. For 
> someone who knows their way around the inner workings of the debian system it 
> would probably be easy to fix, but I don't. Since ASU was moving to use 
> connman instead of the debian method of network management I didn't see the 
> benefit in digging deeper at the time. 

Well, today morning I started investigating the Wifi of the FR gadget:

I configured the MAC addr of the eth0 of FR into my AP; 

I enabled the Wifi in the settings and FR saw my home SSID and asked for
the key; this AP at home is WEP protected and the 'password' (which I
normaly use in my laptop) is something like this wpa_supplicant entry:

     network={
             ssid="tarara"
             scan_ssid=1
             key_mgmt=NONE
             wep_tx_keyidx=0
             wep_key0=42FEEDDEAFBABEDEAFBEEFAA55
     }

I've typed in the key in the FR again and again but it always said
after some time 'ERROR Unable to join network'

then I SSH'ed into the FR and configured by hand:

# cat /etc/network/interfaces:
...
iface eth0 inet dhcp
        wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf

# cat /etc/wpa_supplicant/wpa_supplicant.conf
network={
        ssid="tarara"
        scan_ssid=0
        key_mgmt=NONE
        wep_tx_keyidx=0
        wep_key0=42FEEDDEAFBABEDEAFBEEFAA55
}

and restarted the eth0 interface with:

# ifdown eth0 && ifup eth0

this produced the following output:

sed: unrecognized option `--quiet'
BusyBox v1.9.1 (2008-09-04 08:23:57 CST) multi-call binary

Usage: sed [-efinr] pattern [files...]

WPA: Terminating
sed: unrecognized option `--quiet'
BusyBox v1.9.1 (2008-09-04 08:23:57 CST) multi-call binary

Usage: sed [-efinr] pattern [files...]

WPA: Configuring Interface
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
ioctl[SIOCSIWENCODEEXT]: Operation not supported
udhcpc (v1.9.1) started
run-parts: /etc/udhcpc.d/00avahi-autoipd exited with return code 1
Sending discover...
Sending select for 192.168.2.100...
Lease of 192.168.2.100 obtained, lease time 86400
run-parts: /etc/udhcpc.d/00avahi-autoipd exited with return code 1
adding dns 192.168.2.1

the network came up fin, including DNS:

# ping www.muc.de
PING www.muc.de (193.149.48.10): 56 data bytes
64 bytes from 193.149.48.10: seq=0 ttl=246 time=96.697 ms
64 bytes from 193.149.48.10: seq=1 ttl=246 time=114.740 ms
64 bytes from 193.149.48.10: seq=2 ttl=246 time=232.842 ms
64 bytes from 193.149.48.10: seq=3 ttl=246 time=154.134 ms
64 bytes from 193.149.48.10: seq=4 ttl=246 time=377.435 ms
64 bytes from 193.149.48.10: seq=5 ttl=246 time=88.150 ms

the routing looks a bit broken: note there are two default gateways:

# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
193.149.48.10   192.168.2.1     255.255.255.255 UGH       0 0          0 eth0
192.168.2.0     0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 usb0
0.0.0.0         192.168.2.1     0.0.0.0         UG        0 0          0 eth0
0.0.0.0         192.168.0.200   0.0.0.0         UG        0 0          0 usb0

it would be nice to create some icon in the Om2008.9 desktop to launch
this "ifdown eth0 && ifup eth0", but I already learned that this is
another complex storry and at the moment I can't compile the eet library
for modifying the desktop at all; so I have to live with the command on
the sheel (which is not a big thing);

in my office the AP runs WPA-PSK and it seems that it is not associating
at all; the entry in /etc/wpa_supplicant/wpa_supplicant.conf reads:

network={
        ssid="santaclara"
        key_mgmt=WPA-PSK
        psk="XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
}

again, it is the same as I use in my laptop; and I have no idea why it
does not associate; can I launch somehow the wpa_supplicant in FR in
debug mode? or I will enable the debugging in the AP and have a look
if nobody has some other hint on this;

thx

	matthias

-- 
Matthias Apitz
Manager Technical Support - OCLC GmbH
Gruenwalder Weg 28g - 82041 Oberhaching - Germany
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e <matthias.apitz at oclc.org> - w http://www.oclc.org/ http://www.UnixArea.de/
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