ipv4-for-delegated-apnic-latest.sh CC [DELEGATED_APNIC_LATEST]

ipv4-for-delegated-apnic-latest.sh

#!/bin/bash

MASK=32
SEP='|'
IPV4=ipv4
SCRIPT=$(basename $0)
DELEGATED_APNIC_LATEST=http://ftp.apnic.net/stats/apnic/delegated-apnic-latest

if [ $# -lt 1 ]; then
  echo "Usage: $SCRIPT CC [DELEGATED_APNIC_LATEST]"
  exit 1
fi

cc=$1
list=$2
if [ -z "$list" ]; then
  list=/tmp/${SCRIPT}-$$
  curl -s -L $DELEGATED_APNIC_LATEST >$list
fi

grep $cc $list | grep $IPV4 | while read line; do

  results=($(echo $line | awk -F$SEP '{ printf "%s %s\n", $4, $5 }'))
  square=0
  while [ ${results[1]} != 1 ]; do
    results[1]=$((${results[1]} / 2))
    square=$(($square + 1))
  done
  subnet=$(($MASK - $square))
  echo "${results[0]}/$subnet"
done