connectWifi

#!/bin/bash

# Revisited and fixed by Dj_Dexter 2013-09-24
# re tested in slackware 14.0 and runs fine :)
# only works for wep encripted connections

# die with honor
function usage() {
    echo "usage: ./connectWifi \"<essid>\" [key]"
    echo "       *key in ascii prefaces s:[key]"
    echo "Channel number of channel"
        echo "Example connectWifi "essid" s:key 3"
    exit 1
}

# killed in disgrace
function die() {
    echo
    echo "   [*] ERROR: $1..."
    echo
    exit 1
}

# check for essid
if [[ $1 ]]; then
    # setup
    echo "Starting..."
    ifconfig wlan0 down
    dhclient -r wlan0 -q
    echo " -Previous connection dropped."
    iwconfig wlan0 essid "$1"
    echo " -ESSID Set to $1."
    # check for key
    if [[ $2 ]]; then
        iwconfig wlan0 key $2
        echo " -Key set to $2."
    fi
    # connect
        iwconfig wlan0 channel "$3"
        ifconfig wlan0 up
        iwconfig wlan0 mode Managed
    echo " -Connecting..."
    echo
    dhclient wlan0
    # announce success
    if [[ $? -eq 0 ]]; then
        echo
        echo "Successfully connected to $1!"
        echo
        exit 0
    fi

else
    # no variables
    usage
fi

# declare failure
die "Failed to connect to $1."