rpi_ibss_setup.sh

#! /bin/bash

help()
{
  echo " sudo ibss_setup.sh -install;/-clean -i "$if" -a "192.168.4.5""
}

if [ "$1" = "-install" ];
then
do_install=1;
fi

if [ "$1" = "-clean" ];
then
do_clean=1;
fi

while getopts ":a:i:h" option; do
  case $option in
    a)
       ip_addr=${OPTARG};;
    i)
       if=${OPTARG};;
    h) help
       exit;;
    esac
done


if [ "$do_install" = "1" ];
then
echo "Setting up IBSS mode setup in RPI!"
echo $if $ip_addr
apt-get update
apt-get install udhcpd dnsmasq iptables-persistent
touch /var/lib/misc/udhcpd.lease

test -f /etc/dhcpcd.conf && cp /etc/dhcpcd.conf /etc/dhcpcd.conf.ibss
test -f /etc/udhcpd.conf && cp /etc/udhcpd.conf /etc/udhcpd.conf.ibss

cat > /etc/dhcpcd.conf <<EOF
denyinterfaces $if
EOF
#echo 'denyinterfaces $if' | tee  /etc/dhcpcd.conf

cat > /etc/udhcpd.conf <<EOF
start    $ip_addr
stop    192.168.4.254
interface   $if
max_leases    64
EOF


test -f /etc/rc.local | cp /etc/rc.local /etc/rc.local.ibss
cat > ./tmp.conf<<EOF
#!/bin/bash
ifconfig $if down
iwconfig $if mode ad-hoc
iwconfig $if essid RPI-IBSS
sleep 5
ifconfig $if $ip_addr
ifconfig $if up
udhcpd /etc/udhcpd.conf
exit 0
EOF

rm -f /etc/rc.local
mv ./tmp.conf /etc/rc.local
rm -f ./tmp.conf

chmod ug+x /etc/rc.local
echo "Configuration completed!"
fi

if [ "$do_clean" = "1" ];
then
echo "cleaning RPI IBSS configuration!"
test -f /etc/dhcpcd.conf.ibss && cp /etc/dhcpcd.conf.ibss /etc/dhcpcd.conf
test -f /etc/udhcpd.conf && cp /etc/udhcpd.conf.ibss /etc/udhcpd.conf
test -f /etc/rc.local && cp /etc/rc.local.ibss /etc/rc.local
fi