Hi,
I am working in a build for tl-wr703n including nas and some other features which I will share soon. Since the space is so limited Luci package cannot be included. Actually in my opinion the Luci inteface is not really that useful and I have made a few shell scripts to easily do common tasks instead.
One of my shell scripts is used to show a list of available wifi networks and automatically connect to the one you select.
This is an example of how it looks when running it:
root@OpenWrt:/# conf_wifi_client
Available WIFI networks:
1 : "daikanyama" (secure) (Signal strength: 100%)
2 : "MyPlace" (secure) (Signal strength: 58%)
3 : "au_Wi-Fi" (secure) (Signal strength: 42%)
4 : "007Z_344B599" (secure) (Signal strength: 38%)
5 : "Wi2premium" (open) (Signal strength: 40%)
6 : "Wi2premium cl" (secure) (Signal strength: 40%)
Enter the numeric option for your selected network: 3
Enter password of the selected WIFI network: ************
Trying to connect to WIFI network.
(Wait a few seconds and check status with: iwconfig )The script only works if you have an active wifi interface in 'sta' mode.
Here is the code. You just need to copy all the code in a file, for example "conf_wifi_client", put it in the /bin directory or wherever you want and give it run permissions with: chmod +x <filename>
The only thing you will need to modify a little bit is the uci commands in the end of the script. Just change them to match the labels of your wireless config file.
killall -9 wpa_supplicant
iwlist wlan0 scanning > /tmp/wifiscan #save scan results to a temp file
scan_ok=$(grep "wlan" /tmp/wifiscan) #check if the scanning was ok with wlan0
if [ -z "$scan_ok" ]; then
killall -9 wpa_supplicant
iwlist wlan0-1 scanning > /tmp/wifiscan
fi
scan_ok=$(grep "wlan" /tmp/wifiscan) #check if the scanning was ok
if [ -z "$scan_ok" ]; then #if scan was not ok, finish the script
echo -n "
WIFI scanning failed.
"
exit
fi
if [ -f /tmp/ssids ]; then
rm /tmp/ssids
fi
n_results=$(grep -c "ESSID:" /tmp/wifiscan) #save number of scanned cell
i=1
while [ "$i" -le "$n_results" ]; do
if [ $i -lt 10 ]; then
cell=$(echo "Cell 0$i - Address:")
else
cell=$(echo "Cell $i - Address:")
fi
j=`expr $i + 1`
if [ $j -lt 10 ]; then
nextcell=$(echo "Cell 0$j - Address:")
else
nextcell=$(echo "Cell $j - Address:")
fi
awk -v v1="$cell" '$0 ~ v1 {p=1}p' /tmp/wifiscan | awk -v v2="$nextcell" '$0 ~ v2 {exit}1' > /tmp/onecell #store only one cell info in a temp file
##################################################
## Uncomment following line to show mac address ##
#oneaddress=$(grep " Address:" /tmp/onecell | awk '{print $5}')
onessid=$(grep "ESSID:" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("ESSID:", "");print}')
oneencryption=$(grep "Encryption key:" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("Encryption key:on", "(secure)");print}' | awk '{gsub("Encryption key:off", "(open) ");print}')
onepower=$(grep "Quality=" /tmp/onecell | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{gsub("Quality=", "");print}' | awk -F '/70' '{print $1}')
onepower=$(awk -v v3=$onepower 'BEGIN{ print v3 * 10 / 7}')
onepower=${onepower%.*}
onepower="(Signal strength: $onepower%)"
if [ -n "$oneaddress" ]; then
echo "$onessid $oneaddress $oneencryption $onepower" >> /tmp/ssids
else
echo "$onessid $oneencryption $onepower" >> /tmp/ssids
fi
i=`expr $i + 1`
done
rm /tmp/onecell
awk '{printf("%5d : %s\n", NR,$0)}' /tmp/ssids > /tmp/sec_ssids #add numbers at beginning of line
grep ESSID /tmp/wifiscan | awk '{ sub(/^[ \t]+/, ""); print }' | awk '{printf("%5d : %s\n", NR,$0)}' | awk '{gsub("ESSID:", "");print}' > /tmp/ssids #generate file with only numbers and names
echo -n "Available WIFI networks:
"
cat /tmp/sec_ssids #show ssids list
echo -n "Enter the numeric option for your selected network: "
read nsel
pattern=$(echo " $nsel : ")
wifissid=$(grep "$pattern" /tmp/ssids)
wifissid=$(echo "$wifissid" | awk -v pat="$pattern" '{gsub(pat, "");print}' | awk '{ sub(/^[ \t]+/, ""); print }')
wifissid=${wifissid:1:`expr ${#wifissid} - 2`} #several commands to get clean name of ssid
if [ $nsel -lt 10 ]; then
cell=$(echo "Cell 0$nsel - Address:")
else
cell=$(echo "Cell $nsel - Address:")
fi
nextsel=`expr $nsel + 1`
if [ $nextsel -lt 10 ]; then
nextcell=$(echo "Cell 0$nextsel - Address:")
else
nextcell=$(echo "Cell $nextsel - Address:")
fi
awk -v v1="$cell" '$0 ~ v1 {p=1}p' /tmp/wifiscan | awk -v v2="$nextcell" '$0 ~ v2 {exit}1' > /tmp/cellinfo0 #store only the selected cell info in a temp file
grep -v ESSID /tmp/cellinfo0 > /tmp/cellinfo # delete ESSID line to avoid later grep mistakes
rm /tmp/cellinfo0
wifichannel=$(grep " Channel:" /tmp/cellinfo)
wifichannel=$(echo "$wifichannel" | awk '{gsub(" Channel:", "");print}' | awk '{ sub(/^[ \t]+/, ""); print }') #get clean wifi channel
wifimode=$(grep " WEP" /tmp/cellinfo) #check if encryption mode is WEP
if [ -n "$wifimode" ]; then #check if $wifimode is not an empty string
wifimode="wep"
else
wifimode=$(grep "WPA2 " /tmp/cellinfo) #check if encryption mode is WPA2
if [ -n "$wifimode" ]; then
wifimode="psk2"
else
wifimode=$(grep "WPA " /tmp/cellinfo) #check if encryption mode is WPA
if [ -n "$wifimode" ]; then
wifimode="psk"
else
wifimode="none"
fi
fi
fi
encryp_on=$(grep " Encryption key:on" /tmp/cellinfo)
if [[ "$wifimode" == "none" && -n "$encryp_on" ]]; then
echo " "
echo "Impossible to detect wifi security mode automatically."
echo "Please specify the seurity mode of the network."
echo " 1: WPA"
echo " 2: WPA2"
echo " 3: WEP"
echo " 4: Undefined"
echo -n "Enter the numeric option for your security mode: "
read sel_mode
case "$sel_mode" in
1)
wifimode="psk"
;;
2)
wifimode="psk2"
;;
3)
wifimode="wep"
;;
4)
wifimode="none"
;;
esac
fi
if [ "$wifimode" != "none" ]; then #ask for passwork when needed
echo -n "Enter password of the selected WIFI network: "
read wifipass
fi
rm /tmp/cellinfo
rm /tmp/ssids
rm /tmp/sec_ssids
rm /tmp/wifiscan
#write results in the wireless config file and reset wifi interface
uci set wireless.radio0.channel=$wifichannel
uci set wireless.wificlient.ssid="$wifissid"
uci set wireless.wificlient.encryption=$wifimode
uci set wireless.wificlient.key=$wifipass
uci commit wireless
echo -n "
Trying to connect to WIFI network.
(Wait a few seconds and check status with: iwconfig )
"
wifi down
wifiI am just a beginner in OpenWrt and it took me a lot testing time to complete this script but I think it is working perfectly now.
Any comments or improvements are welcome.
Enjoy!
(Last edited by griguolcomerranas on 15 Dec 2012, 16:43)
