jerry74 · March 28, 2015 09:37 · Mar 28, 2015
diff --git a/gistfile1.txt b/gistfile1.txt
@@ -0,0 +1,54 @@
+#!/bin/bash
+#wget -O- 'http://ftp.apnic.net/apnic/stats/apnic/delegated-apnic-latest' | awk -F\| '/CN\|ipv4/ { printf("%s/%d\n", $4, 32-log($5)/log(2)) }' > /etc/chnroute.txt
+netcalc(){
+
+  local IFS='.' ip i
+  local -a oct msk
+
+  read -ra oct <<<"$1"
+  read -ra msk <<<"$2"
+
+  for i in ${!oct[@]}; do
+  ip+=( "$(( oct[i] & msk[i] ))" )
+  done
+
+  NET="${ip[*]}"
+}
+
+cidr2mask ()
+{
+   # Number of args to shift, 255..255, first non-255 byte, zeroes
+   set -- $(( 5 - ($1 / 8) )) 255 255 255 255 $(( (255 << (8 - ($1 % 8))) & 255 )) 0 0 0
+   [ $1 -gt 1 ] && shift $1 || shift
+   MASK="${1-0}.${2-0}.${3-0}.${4-0}"
+}
+
+cidrsplit ()
+{
+  local IFS='/'
+  local -a ipcidr
+
+  read -ra ipcidr <<<"$1"
+
+  IP=${ipcidr[0]}
+  CIDR=${ipcidr[1]}
+}
+
+
+while read line
+do
+cidrsplit $line
+cidr2mask $CIDR
+netcalc $IP $MASK
+echo no-route = $IP/$MASK
+#echo MASK: $MASK
+#echo NETWORK: $NET
+
+done < chnroute.txt 
+
+
+
+
+
+
+