Neo FreeRunner Wifi
From Openmoko
Contents |
What APs are available
root@om-gta02:~# iwlist eth0 scan
Using WPA and /etc/network/interfaces
Once you have a /etc/wpa_supplicant/wpa_supplicant.conf file, add a line under the eth0 entry in /etc/network/interfaces:
iface eth0 inet dhcp wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
Save your changes and run:
# ifdown eth0 && ifup eth0
You'll get a lot of messages, like ioctl[SIOCSIWENCODEEXT]: Operation not supported and sed: unrecognized option `--quiet', they appear to be harmless. The "--quiet" error message can be avoided by replacing "sed --quiet" with "sed -n" in /etc/wpa_supplicant/*.sh
Using WEP and /etc/network/interfaces
iface eth0 inet dhcp wireless-key my_wep_key wireless-essid my_essid
iface eth0 inet dhcp wpa-wep-key0 my_wep_key wpa-key-mgmt NONE wpa-ssid my_essid
Save your changes and run:
# ifdown eth0 && ifup eth0
Manual attempt
Create and edit a suitable /etc/wpa_supplicant/wpa_supplicant.conf
root@om-gta02:~# ifup eth0 root@om-gta02:~# wpa_supplicant -ieth0 -c/etc/wpa_supplicant/wpa_supplicant.conf -B root@om-gta02:~# udhcpc eth0
Sample wpa_supplicant.conf
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
eapol_version=1
ap_scan=1
fast_reauth=1
# WPA2:
network={
ssid="your ssid"
scan_ssid=1
proto=RSN
key_mgmt=WPA-PSK
pairwise=CCMP TKIP
group=TKIP CCMP
psk="secret key"
priority=50
}
# WPA:
network={
ssid="your_ssid"
proto=WPA
key_mgmt=WPA-PSK
pairwise=TKIP
group=TKIP
scan_ssid=1
psk="secret key"
priority=10
}
# WEP:
network={
ssid="your_ssid"
scan_ssid=1
key_mgmt=NONE
wep_tx_keyidx=0
wep_key0=your_hex_key
priority=8
}
# Open:
network={
ssid="your ssid"
key_mgmt=NONE
priority=5
}
wpa_supplicant.conf explained
The highest priority is tried first then falls back to the next highest number.
priority=100 1st
then
priority=99
# Simple case: WPA-PSK, PSK as an ASCII passphrase, allow all valid ciphers
network={
ssid="AP_ESSID"
psk="presharedkey"
priority=5
}
#try open AP regardless of its SSID.
# change root password before you go roaming around it could prove dangerous
network={
key_mgmt=NONE
priority=1 #try any open AP last
}
A more in depth explanation can be found here:
http://hostap.epitest.fi/gitweb/gitweb.cgi?p=hostap.git;a=blob_plain;f=wpa_supplicant/wpa_supplicant.conf
A very ugly /etc/init.d/wlan startscript
#!/bin/sh
#
# wlan This shell script starts and stops wlan.
#
# processname: wlan
# Source function library.
#. /etc/rc.d/init.d/functions
# "written" by HdR
RETVAL=0
prog="wlan"
# test -f /etc/default/$prog && . /etc/default/$prog
start() {
echo -n "Starting $prog: "
ifconfig eth0 up
wpa_supplicant -ieth0 -c/etc/wpa_supplicant/wpa_supplicant.conf -B
sleep 10
udhcpc eth0
RETVAL=$?
return $RETVAL
}
stop() {
# Stop daemons.
echo -n "Shutting down $prog: "
killall wpa_supplicant
ifconfig eth0 down
# killproc gpsd
RETVAL=$?
return $RETVAL
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
restart|reload)
stop
start
RETVAL=$?
;;
*)
echo "Usage: $0 {start|stop|restart}"
exit 1
esac
exit $RETVAL
Available Software
Here are some applications available to aid in WiFi administration:
lint-wifi
lint-wifi work in progress
http://wiki.openmoko.org/wiki/Lint-wifi
Mofi
Mofi is software for the OpenMoko platform allowing phone users to search for and connect to wireless access points within range.
