# v.sh
#!/bin/sh
random() {
	tr </dev/urandom -dc A-Za-z0-9 | head -c5
	echo
}

array=(1 2 3 4 5 6 7 8 9 0 a b c d e f)
gen64() {
	ip64() {
		echo "${array[$RANDOM % 16]}${array[$RANDOM % 16]}${array[$RANDOM % 16]}${array[$RANDOM % 16]}"
	}
	echo "$1:$(ip64):$(ip64):$(ip64):$(ip64)"
}

gen_data() {
    seq $FIRST_PORT $LAST_PORT | while read port; do
        echo "$(gen64 $IP6)"
    done
}

gen_ifconfig() {
    cat <<EOF
$(awk '{print "ifconfig eth0 inet6 add " $1 "/64"}' ${WORKDATA})
EOF
}

gen_sys() {
    cat <<EOF
IPV6ADDR_SECONDARIES="$(awk '{printf $1 "/64 "}' ${WORKDATA})"
EOF
}


echo "installing apps"
yum -y install epel-release squid net-tools htop  >/dev/null

IP4=$(curl -4 -s icanhazip.com)
IP6=$(curl -6 -s icanhazip.com | cut -f1-4 -d':')

echo "Internal ip = ${IP4}. Exteranl sub for ip6 = ${IP6}"

echo "How many proxy do you want to create? Example 500"
read COUNT

WORKDIR="/home/vps"
WORKDATA="${WORKDIR}/v_ipv6.txt"
mkdir $WORKDIR && cd $_

FIRST_PORT=10000
LAST_PORT=$(($FIRST_PORT + $COUNT))

gen_data > $WORKDATA
gen_ifconfig >$WORKDIR/boot_ifconfig.sh
chmod +x ${WORKDIR}/boot_*.sh

bash ${WORKDIR}/boot_ifconfig.sh
ulimit -n 10048
gen_sys >> /etc/sysconfig/network-scripts/ifcfg-eth0