Update ChinaDNS IP Address File

update_chinadns.bash

if curl -f 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' -o /tmp/chinaip.list; then
  cat /tmp/chinaip.list | grep ipv4 | grep CN | awk -F\| '{ printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > /tmp/chinadns_chnroute.txt
  if [[ $(wc -l </tmp/chinadns_chnroute.txt) -ge 100 ]]; then
    echo '47.89.44.170/32' >> /tmp/chinadns_chnroute.txt
    echo '139.162.86.215/32' >> /tmp/chinadns_chnroute.txt
    cp /tmp/chinadns_chnroute.txt /etc/chinadns_chnroute.txt
  else
    echo 'Too few lines. File corrupted?'
  fi;
else
  echo 'Failed to download China IP addresses'
fi;