connect

#!/usr/bin/env bash
usage() {
cat << EOF
                              
     __     __  __  __      __
 /\ |__)   |  \|__)/  \|\ ||_ 
/--\| \ .  |__/| \ \__/| \||__

              WPA/WPA2 support

This script connects the AR Drone to a WPA/WPA2 secured network.

Usage: script/connect "<essid>" -p "<password>" [-a <address>] [-d <droneip>]
  <essid>         Name of the WPA2 network to connect the drone to.
  <password>      Password of the network.
  <address>       (optional) Address to be set on the drone when connected to the network.
                    Use a different address than the router's default.
                    Set to "auto" or "dhcp" to let the router DHCP server auto-assign an IP.
                    Default is "auto".
  <droneip>       (optional) Current drone's ip address.
                    Default is 192.168.1.1
EOF
}

ESSID=$1
PASSWORD=$3
ADDRESS=$5
DRONEIP=${7:-"192.168.1.1"}
DHCPC=""

if [[ -z $ADDRESS ]] || [[ $ADDRESS = "auto" ]] || [[ $ADDRESS = "dhcp" ]]; then
  DHCPC="; wait 5; /sbin/udhcpc -i eth0"
  ADDRESS="0.0.0.0"
fi

IFCONFIG="ifconfig eth0 $ADDRESS;"

if [[ -z $ESSID ]] || [[ -z $PASSWORD ]]; then
  usage; exit 1
fi

set -ue

echo "ESSID: $ESSID"
echo "PASSWORD: $PASSWORD"
echo "ADDRESS: $ADDRESS"
echo "DRONE_IP: $DRONEIP"

{( echo "\
  wpa_passphrase '$ESSID' '$PASSWORD' > /etc/wpa_supplicant.conf
  { $IFCONFIG iwconfig eth0 essid '$ESSID' && wpa_supplicant -B -Dwext -ieth0 -c/etc/wpa_supplicant.conf $DHCPC; } &
"; sleep 1; ) | telnet $DRONEIP > /dev/null; }