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|
#!/bin/bash
dhcpd_file=/etc/udhcpd.conf
hostapd_file=/etc/hostapd.conf
interface=wlan0
bridge_mode=0
do_start() {
if [ "$bridge_mode" = 1 ]; then
interface=$b
if ! grep -E -q "^bridge=$interface\s*$" $hostapd_file; then
echo "Enabling bridge=br0 in $hostapd_file"
sed -r -i "s/^#?bridge=.*$/bridge=$interface/" $hostapd_file
fi
else
if grep -E -q "^bridge=.*$" $hostapd_file; then
echo "Disabling bridge in $hostapd_file"
sed -r -i "s/^bridge=/#bridge=/" $hostapd_file
fi
fi
echo "Starting hostap daemon"
/etc/init.d/hostapd start
if [ "$bridge_mode" != 1 ]; then
echo "Setting IP address to $ip"
ifconfig $interface $ip
# strip off end of IP address to get subnet
# assumes subnet of /24
subnet=${ip%.*}
# escape periods for regex
subnet_regex=${subnet//./\\.}
ip_regex=${ip//./\\.}
# set default address range for dhcpd
addr_start=100
addr_end=254
if ! grep -E -q "^start\s+$subnet_regex\." $dhcpd_file; then
echo "Changing dhcpd start to $subnet.$addr_start"
sed -r -i "s/^start\s+.*$/start $subnet.$addr_start/" $dhcpd_file
fi
if ! grep -E -q "^end\s+$subnet_regex\." $dhcpd_file; then
echo "Changing dhcpd end to $subnet.$addr_end"
sed -r -i "s/^end\s+.*$/end $subnet.$addr_end/" $dhcpd_file
fi
# update dhcpd addresses if needed
if ! grep -E -q "^option\s+router\s+$ip_regex" $dhcpd_file; then
echo "Changing dhcpd router to $ip"
sed -r -i "s/^option\s+router\s+.*$/option router $ip/" $dhcpd_file
fi
else
# unset ip address for bridge mode
ifconfig wlan0 0.0.0.0
fi
if ! grep -E -q "^interface\s+$interface" $dhcpd_file; then
echo "Changing dhcpd interface to $interface"
sed -r -i "s/^interface\s+.*$/interface $interface/" $dhcpd_file
fi
ocg-dhcpd start
}
do_stop() {
echo "Stopping hostap daemon"
/etc/init.d/hostapd stop
ocg-dhcpd stop
}
usage() {
echo "Usage: $(basename $0) start|stop|restart [options]"
echo " options:"
echo " -a <address> Sets AP IP address (defaults to 192.168.3.1)"
echo " -b <interface> Add AP to specified bridge interface (conflicts with -a)"
exit 1
}
# main
if [[ $# < 1 ]]; then
usage
fi
cmd=$1
shift
while getopts "a:b:h" opt; do
case "$opt" in
a)
a=$OPTARG
;;
b)
b=$OPTARG
bridge_mode=1
;;
h)
usage
;;
*)
usage
;;
esac
done
# can't specify both address and bridge mode
if [ -n "$a" ] && [ -n "$b" ]; then
usage
fi
if [ -n "$a" ]; then
ret=1
if [[ $a =~ ^([0-9]{1,3}\.){3,3}[0-9]{1,3}$ ]]
then
OIFS=$IFS
IFS='.'
ip=($a)
IFS=$OFIS
[[ ${ip[0]} -le 255 && ${ip[1]} -le 255 && ${ip[2]} -le 255 && ${ip[3]} -le 255 ]]
ret=$?
fi
if [[ ret -ne 0 ]]
then
echo "invalid IP address"
exit 1
fi
ip=$a
else
ip="192.168.3.1"
fi
case $cmd in
start)
do_start
;;
stop)
do_stop
;;
restart)
do_stop
sleep 1
do_start
;;
*)
usage
;;
esac
exit 0
|
