wpa_supplicant helper script

AurosGamma · 2011-03-22 05:28:03

Hey, this is my first script ever!
I wrote a wpa_supplicant helper script, because im always reinstalling arch (trying new WM,DE,etc), so this is the script that i use to get connected to wireless networks easily. This script is better for a fresh install, on a later time is better to use wicd CLI or something like that. Maybe this can be helpful for someone

#!/bin/bash
# Run this script with bash shell
# wpa_supplicant helper script

#ifconfig eth0 down
#ifconfig wlan0 up

clear

ifconfig eth0 down
ifconfig wlan0 up
pkill dhcpcd

GLOBAL=0
ext=n
PASS="1234"

echo "1) Set up new connection (set /etc/wpa_supplicant.conf)"
echo "2) Use actual configuration (/etc/wpa_supplicant.conf)"
echo "3) Exit"
echo -n :; read GLOBAL

if [ $GLOBAL = 1 ]; then

    while [ $ext = n ]; do
        clear
        
        flag=1
        count=$(iwlist scan 2>/dev/null | grep Cell | wc -l)
        iwlist scan 2>/dev/null | grep ESSID > buffer.cr
        (( count++ ))
    
        while [ $flag -lt $count ]; do

            cell=$(iwlist scan 2>/dev/null | grep "Cell 0$flag")
            essid=$(sed -n -e "${flag}p" ./buffer.cr)

            echo -n "$cell"
            echo "$essid"
            echo ""

            (( flag++ ))

        done
        
        rm  buffer.cr

        echo -n "Which connection use?(essid): "; read essid;
        echo -n "Password: "; read PASS;
        clear
        echo "Connection Data:"
        echo ESSID: $essid
        echo Password: $PASS
        echo -n "Is this correct?(y/n):"; read ext
        if [ $ext = y ]; then
            wpa_passphrase $essid "$PASS" > /etc/wpa_supplicant.conf
            GLOBAL=2;
        fi
    done

    ext=n
fi

if [ $GLOBAL = 2 ]; then

    wpa_supplicant -B -Dwext -i wlan0 -c /etc/wpa_supplicant.conf

    SEL=0
    IP=192.168.0.1
    GW=192.168.0.1
    DNS=192.168.0.1

    while [ $ext = n ]; do
        echo
        echo "Adress type:"
        echo "1) DHCP"
        echo "2) Static"
        echo -n :; read SEL

        case $SEL in
            1)
                dhcpcd wlan0
                ext=y
                ;;
            2)
                echo
                echo -n "IP Adress: "; read IP
                echo -n "Gateway: "; read GW
                echo -n "Primary DNS: "; read DNS
                ifconfig wlan0 $IP
                route add default gw $GW
                echo "# Generated by wpa_supplicant helper script" > /etc/resolv.conf
                echo "# /etc/resolv.conf.head can replace this line" >> /etc/resolv.conf
                echo "nameserver $DNS" >> /etc/resolv.conf
                echo "# /etc/resolv.conf.tail can replace this line" >> /etc/resolv.conf
                ext=y
                ;;
            *)
                clear
                echo "No adress type specified, try again"
                ;;
        esac
    done
    echo
    echo "DONE!, verify your connection."
    exit 0
    
    else
        echo
        echo "Nothing changed!"
fi

- The script scans nearly networks, so you can choose wich connection do you want to use
- You can you choose to use static or dhcp IP Adresses
- The script set ups /etc/resolv.conf (DNS Servers)

While you're using the script is necessary to introduce the info (essid, password,ip,etc) without quotes.
I hope this helps (someone )

P.S. Needs the packages: wpa_supplicant,wireless_tools

Last edited by AurosGamma (2011-03-23 00:55:02)

Appé · 2011-03-22 06:48:12

Does this script work with WPA2 too?

AurosGamma · 2011-03-22 06:58:15

Yeah, it worked for me on wpa and wpa2

Appé · 2011-03-22 07:16:50

Great!
Running D-Link DWA-140. Picked "wireless_tools" and "netcfg" during install.
Think this script will make this run, DWA-140 is already included in the kernel?

Will try it when I get home from work.

Thanks!

AurosGamma · 2011-03-22 08:40:31

The script works with any router, that's indifferent.
You should worry about installing your wireless card driver
e.g. My laptop has Intel Wifi link 5100, so i installed:

iw
iw_5000 (right now i cant remember the real name) that works on my chipset
wireless_tools

Just find whats your chipset and install the proper driver, im sure that you can find all the info on the wiki
P.S. This scripts was made based on the wiki steps, so you shouldn't have any problem

Last edited by AurosGamma (2011-03-22 08:41:15)

emile · 2012-04-26 11:03:40

Hi,
Thank you for your helpful script. It is exactly what I was looking for.

If you are still using this script, I'd suggest adding a root user check, as it appears to be a requirement to run properly:

# Root check (Insert at beginning)
if [ 'id -u' -ne 0 ]; then
echo "Error: This script has to be run by root."
exit 2
fi

Arch Linux

#1 2011-03-22 05:28:03

wpa_supplicant helper script

#2 2011-03-22 06:48:12

Re: wpa_supplicant helper script

#3 2011-03-22 06:58:15

Re: wpa_supplicant helper script

#4 2011-03-22 07:16:50

Re: wpa_supplicant helper script

#5 2011-03-22 08:40:31

Re: wpa_supplicant helper script

#6 2012-04-26 11:03:40

Re: wpa_supplicant helper script

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