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|
#!/bin/sh
usage()
{
cat << EOF
usage $0 options
This script gets you into the KREBS Darknet
all parameters are optional
Options:
-h Show this message(haha)
-4 \$ipv4 specify an ip(version 4), this also disables random ip mode, default is random
-t \$DIR Choose another Temporary directory, default is /tmp/tinc-install-fu
-o \$HOST Choose another Hostname, default is your system hostname
-n \$NET Choose another tincd netname,this also specifies the path to your tinc config, default is retiolum
-s \$SUBNET Choose another Subnet(version4), default is 10.243.
-m \$MASK Choose another Subnet Mask(version4), default is /16
-u \$URL specify another hostsfiles.tar.gz url, default is euer.krebsco.de/retiolum/hosts.tar.gz
EOF
}
#check if ip is valid ipv4 function
check_ip_valid4()
{
if [ "$(echo $1 | awk -F"\." ' $0 ~ /^([0-9]{1,3}\.){3}[0-9]{1,3}$/ && $1 <=255 && $2 <= 255 && $3 <= 255 && $4 <= 255 ' 2>/dev/null)" == "$1" ] && [ ${1:0:${#SUBNET4}} == $SUBNET4 ]
then
return 0
else
return 1
fi
}
#check if ip is taken function
check_ip_taken()
{
if grep -q -E "$1(#|/)" $TEMPDIR/hosts/* ;then
echo $1 is taken
return 1
else
echo $1 seems free
return 0
fi
}
#if hostname is taken, count upwards until it isn't taken function
check_hostname()
{
TSTFILE=$TEMPDIR/hosts/$1
LCOUNTER=0
if test -e $TSTFILE; then
while test -e $TSTFILE; do
let LCOUNTER=LCOUNTER+1
TSTFILE=$TEMPDIR/hosts/$1$LCOUNTER
done
HOSTN=$1$LCOUNTER
else
HOSTN=$1
fi
}
TEMPDIR=/tmp/tinc-install-fu
HOSTN=$(hostname)
NETNAME=retiolum
SUBNET4=10.243.
MASK4=/16
RAND=1
URL=euer.krebsco.de/retiolum/hosts.tar.gz
#check if everything is installed
if $(! test -e "/usr/sbin/tincd"); then
echo "Please install tinc"
exit 1
fi
if $(! test -e /usr/bin/awk); then
echo "Please install awk"
exit 1
fi
if $(! test -e /usr/bin/curl); then
echo "Please install curl"
exit 1
fi
if $(! /bin/ping -c 1 euer.krebsco.de -W 5 &>/dev/null) ;then
echo "Cant reach euer, check if your internet is working"
exit 1
fi
#parse options
while getopts "h4:t:o:n:s:m:u:" OPTION
do
case $OPTION in
h)
usage
exit 1
;;
4)
IP4=$OPTARG
RAND=0
if ! check_ip_valid4 $IP4; then echo "ip is invalid" && exit 1; fi
;;
t)
TEMPDIR=$OPTARG
;;
o)
HOSTN=$OPTARG
;;
n)
NETNAME=$OPTARG
;;
s)
SUBNET4=$OPTARG
;;
m)
MASK4=$OPTARG
;;
u)
URL=$OPTARG
if $(! curl -s --head $URL | head -n 1 | grep "HTTP/1.[01] [23].." > /dev/null); then
echo "url not reachable"
exit 1
fi
;;
esac
done
#test if tinc directory already exists
if test -e /etc/tinc/$NETNAME; then
echo "tinc config directory /etc/tinc/$NETNAME does already exist. (backup and) delete config directory and restart"
exit 1
fi
#get tinc-hostfiles
mkdir -p $TEMPDIR/hosts
curl euer.krebsco.de/retiolum/hosts.tar.gz | tar zx -C $TEMPDIR/hosts/
#check for free ip
until check_ip_taken $IP4; do
if [ $RAND -eq 1 ]; then
IP4="10.243.$((RANDOM%255)).$((RANDOM%255))"
else
printf 'choose new ip: '
read IP4
while ! check_ip_valid4 $IP4; do
printf 'the ip is invalid, retard, choose a valid ip: '
read IP4
done
fi
done
#check for free hostname
check_hostname $HOSTN
echo "your ip is $IP4"
echo "your hostname is $HOSTN"
|
