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|
#!/bin/env bash
interface="";
server="dhcpd"
ip="10.5.5.11"
range="24"
interface_internet=""
# Todo : List interface ✓
# Select first ✓
# Select dhcpd or dnsmasq ✓
# Select ip range ✓
# Select ip ✓
# Help ✓
# Install from Makefile ✓
# Add support for tethapp
# dnsmasq config overwrite
# Default interface is the first non-wireless interfaces (sorted alpha-num)
function guess_nowifi {
for i in `ls /sys/class/net/`; do
if [ ! -d "/sys/class/net/$i/wireless" ] ; then
if [ "$interface" ] ; then
if [[ "$i" < "$înterface" ]] ; then
interface="$i"
fi
else
interface="$i"
fi
fi
done
}
function guess_internet {
echo $(ip route show | grep 'default' | \
sed 's/.*dev/dev/' | sed 's/scope//' | \
sed 's/src \([[:digit:]]\{1,3\}\.\)\{3\}[[:digit:]]\{1,3\}//g' | \
sed 's/link//' |
tr -s ' ' |
cut -d' ' -f 2)
}
if [ "$1" == "dns" ] ; then
server="dnsmasq"
shift
elif [ "$1" == "teth" ] ; then
interface_internet=$(guess_internet)
shift
elif [ "$1" == "teth_dns" ] ; then
interface_internet=$(guess_internet)
server="dnsmasq"
shift
fi
if [ "$1" == "help" -o "$1" == "-h" -o "$1" == "--help" ] ; then
echo 'Usage : autoDHCP [interface] [ip/range] [dns]'
echo ''
echo 'You also put the server type at the start of the command'
echo 'Ex :'
echo '> autoDHCP wlp3s0 10.5.5.11/24'
echo '> autoDHCP eth0 192.168.0.1 dns'
echo '> autoDHCP dns eth0 192.168.0.1/30'
fi
if [ "$1" ] ; then
interface="$1"
echo "Interface set to ${interface}"
fi
if [ "$2" ] ; then
if [[ "$2" =~ .*/.* ]] ; then
ip=$(echo $2 | cut -d'/' -f1)
range="`echo $2 | cut -d'/' -f2 `"
echo "Range set to ${range}"
else
ip="$2"
fi
echo "Ip set to ${ip}"
fi
if [ "$3" == "dns" ] ; then
server="dnsmasq"
fi
IFS='.' read -r -a ipList <<< "$ip"
mask=$(( 4294967295 >> 32-${range} << 32-${range} ))
ipRaw=$(( ipList[0]*2**24 + ipList[1]*2**16 + ipList[2]*2**8 + ipList[3] ))
ipNetRaw=$(( ipRaw & mask ))
ipNet="$(( ipNetRaw >> 24 )).$(( ipNetRaw >> 16 & 255 )).$(( ipNetRaw >> 8 & 255)).$(( ipNetRaw & 255))"
if [ -z "$interface" ] ; then
guess_nowifi
fi
sudo ip l set "$interface" up
sudo ip a r "${ip}/${range}" dev "$interface"
#sudo ip r a "${ip}/${range}" dev "$interface" src "${ip}"
if [ "$server" == "dhcpd" ] ; then
sudo /usr/bin/dhcpd -4 -q -pf /run/dhcpd4.pid "$interface"
elif [ "$server" == "dnsmasq" ] ; then
echo 'Configure dnsmasq'
ip_start=$(echo "${ip}" | sed 's/\(\([0-9]\{1,3\}\.\)\{3\}\)[0-9]\{1,3\}/\1/')
ip_start_tmp=$(echo "${ip}" | sed 's/\(\([0-9]\{1,3\}\.\)\{3\}\)//')
ip_start_tmp=$((ip_start_tmp+1))
dhcp_range=$(echo ${ip_start}{$ip_start_tmp\,,254}),12h
echo "$dhcp_range"
cat <<< $(
echo "
interface=${interface}
listen-address=${ip}
bind-interfaces
dhcp-range=${dhcp_range}"
) > /tmp/dnsmasq.conf
sudo dnsmasq --conf-file=/tmp/dnsmasq.conf
else
echo "Server name ${server} unknow"
fi
if [ -n "$interface_internet" ] ; then
echo "Routage des connections internet (${interface_internet} => ${interface})"
sudo iptables -t nat -A POSTROUTING -o "${interface_internet}" -j MASQUERADE
sudo iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i "${interface}" -o "${interface_internet}" -j ACCEPT
fi
echo 'Should be ready ;)'
|
