19/10/2013 Update here
This script attempts to semi-automate the wifi connection process fromthe command line. It is intended to be used on a headless / GUI-less machine without the
requirement of typing several commands for a connection. For instance a Raspberry PI.
It works reasonably well for most applications and can handle ESSID's / passwords with spaces.
Storage of previous connection credentials is in PLAINTEXT as [ESSID].wpa files in the executed directory and in /etc/wpasupplicant.conf.
These .wpa files are used to connect to several different AP's using previously stored info.
Probably a real good idea to stop and other network managing software while running this script, for instance running "airmon-ng check kill" will do a good job.
Also in testing wpa_supplicant does a pretty good job of re-connecting a disassociated link automatically.
Operation is simple. In the case with Debian it is:
sudo ./connect.sh wlan0
Mainly created from a combination of scripts taken from theses two
sources:
http://www.backtrack-linux.org/forums/archive/index.php/t-3367.html
AND
http://www.linuxquestions.org/questions/linux-general-1/wifi-connect-script-tested-in-ubuntu-772646/
Feel free to comment or send improvements.
Download from http://pastebin.com/FzJnv5Nk
or below.
#!/bin/bash
# http://pastebin.com/Pa90HBiU
# 01/06/2013
# This script attempts to semi-automate the wifi connection process from
# the command line.
# It is intended to be used on a headless machine without the
# requirement of typing several commands for a connection.
# The script stores previous connection credentials in PLAINTEXT as
# *.wpa files in the executed directory and in /etc/wpasupplicant.conf.
# These .wpa files are used to connect to several different ap using
# previously stored info.
# Probably a good idea to stop and other network managing software while
# running this script, also in testing wpa_supplicant does a pretty good
# job of re-connecting a disassociated link automatically.
#
# Mainly created from a combination of scripts taken from theses two
# sources:
# http://www.backtrack-linux.org/forums/archive/index.php/t-3367.html
# AND
# http://www.linuxquestions.org/questions/linux-general-1/wifi-connect\
# -script-tested-in-ubuntu-772646/
#
# old version http://pastebin.com/Pa90HBiU 01/06/2013
#
# Copy, Distribute and Modify Freely.
#
INT=$1
if [ -z "$1" ]; then
printf "Usage: $0 [interface]\n"
exit
fi
if [ "$(id -u)" != "0" ]; then
printf "This script must be run as root\n" 1>&2
exit
fi
#
# Search for previous saved config files
#
function read_saved {
#
# Search for previous wpa configuration files.
#
#
# Save and change IFS so spaces in file names are not interpreted as
# separate lines in the array
#
OLDIFS=$IFS
IFS=$'\n'
#
# Read all file names into an array
# ref:http://www.cyberciti.biz/tips/handling-filenames-with-spaces\
# -in-bash.html
#
# " -printf '%f\n' " removes path info from outputs
#
# ref:http://serverfault.com/questions/354403/remove-path-from-find\
# -command-output
#
SAVED_LIST=($(find . -type f -name "*.wpa" -printf '%f\n'))
#
# restore ifs
#
IFS=$OLDIFS
#
# Tests for number of saved wifi connections, if none exit
#
if [ -z "${SAVED_LIST[0]}" ]; then
printf "There are no previous saved wifi connections\n\n"
#
# Create new connection
#
conf_create
fi
#
#PS3 Sets the prompt for the select statement below
#
PS3="Choose a previously saved wifi connection or 's' to skip: "
#
#Select one of the previous saved configurations to connect with or quit
#
select ITEM in "${SAVED_LIST[@]}"; do
#
# Quit if selected number does not exist or alpha in entered
#
if [ -z "$ITEM" ] ; then
printf "Skipping\n"
conf_create
fi
printf "$ITEM is selected\n"
cat "$ITEM">/etc/wpa_supplicant.conf | xargs
connect "$ITEM"
done
}
function conf_create (){
#
# Scans for wifi connections & isolates wifi AP name
#
eval LIST=( $(iwlist $INT scan 2>/dev/null | awk -F":" '/ESSID/{print $2}') )
#
#PS3 Sets the prompt for the select statement below
#
PS3="Choose wifi connection or 'q' to quit: "
#
# Tests for number of wifi connections, exits if none
#
if [ -z "${LIST[0]}" ]; then
printf "No available wifi connection using $INT\n"
exit
fi
#
# Select from a LIST of scanned connections
#
select ITEM in "${LIST[@]}"; do
ifconfig $INT | grep inet
#
# Quit if selected number does not exist or alpha in entered
#
if [ -z "$ITEM" ] ; then
printf "Exiting\n"
exit
fi
#
# Get user input for passphrase no need to escape spaces
#
printf "Enter the passphrase for $ITEM?\n"
read "PASSPHRASE"
#
# Append the ITEM variable (ESSID) to .wpa to make a filename
# for saved configs
#
FILENAME=$ITEM".wpa"
#
# Run wpa_passphrase to generate a file for wpa_supplicant to
# use, store it locally and in etc/wpa_supplicant.conf
#
printf "Running wpa_passphrase\n"
wpa_passphrase "$ITEM" "$PASSPHRASE" > "$FILENAME" | xargs
cat "$FILENAME">/etc/wpa_supplicant.conf | xargs
printf "Creating new configuration using $ITEM\n"
#
# Jump to connect function, pass on the ESSID variable for connection
#
connect $ITEM
done
}
function connect (){
printf "Connecting using file $*\n"
#
# Capture incoming argument
#
ESSID=$*
#
# Kill previous instances of wpa_supplicant to stop other instances
# wpa_supplicant fighting several different AP's
# Kill based on
# ref: http://thegeekstuff.com/2011/10/grep-or-and-not-operators
# and
# http://stackoverflow.com/questions/3510673/find-and-kill-a-\
# process-in-one-line-using-bash-and-regex
#
# Release dhcp ip's and bring down the interface
#
kill $(ps aux | grep -E '[w]pa_supplicant.*\'$INT'' | awk '{print $2}') 2>/dev/null | xargs
dhclient $INT -r
ifconfig $INT down
#
# Assign new credentials to interface
#
iwconfig $INT mode managed essid "$ESSID"
printf "Configured interface $INT; ESSID is $ESSID\n"
ifconfig $INT up
printf "Interface $INT is up\n"
wpa_supplicant -B -Dwext -i$INT -c/etc/wpa_supplicant.conf 2>/dev/null | xargs
printf "wpa_supplicant running, sleeping for 15...\n"
#
# Wait to connect before asking for a ip address
#
sleep 15
printf "Running dhclient\n"
dhclient $INT
#
# Show current ip for interface
#
ifconfig $INT | grep inet
exit
}
function clean_slate (){
#
# Optional Clean Slate commands, it is recommended that you perform
# a "airmon-ng check kill" to ensure that any other network managers
# do not intefere with the connection process
#
printf "It is recommended that you perform a \"airmon-ng check kill\" once to ensure that any other network managers do not interfere with the connection process\n"
#
# Untested, airmon-ng check kill works better here
#
# service network-manager stop 2>/dev/null >/dev/null
# service avahi-daemon stop 2>/dev/null >/dev/null
# sleep 10
# killall wpa_supplicant 2>/dev/null
# ifconfig $INT up
}
#
# Start here
#
clean_slate
read_saved
exit
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To make ssb not load you have to blacklist it, reboot and execute
sudo update-initramfs -k all -uIf you fail to do this, ssb is loaded before b43 and it will cause error sand the b43 module will fail to load correctly. Lots of ssb and b43 errors in your dmesg.
Remember to unblacklist ssb after the update-initramfs.
If you still have this problem, I suggest that you make a script in your init.d
#!/bin/sh
modprobe -r ssb
modprobe -r b43
modprobe b43
modprobe ssb