Add snippet 'is_valid_ipv6.sh'.

snippets/is_valid_ipv6.sh

@@ -0,0 +1,30 @@
+#!/usr/bin/env bash
+
+# - Test if given argument is a valid IPv6 Address
+# -
+is_valid_ipv6() {
+   local _ipv6="$1"
+
+   _regex_ipv6='^([0-9a-fA-F]{0,4}:){1,7}[0-9a-fA-F]{0,4}$'
+
+
+   if [[ "$_ipv6" =~ ${_regex_ipv6} ]]; then
+      return 0
+   else
+      return 1
+   fi
+}
+
+if [ "X$@" = "X" ]; then
+   echo -e "\n\t\033[33m\033[1mNo argumnet given!\033[m\n"
+   exit 1
+fi
+
+if is_valid_ipv6 $@ ; then
+   echo -e "\n\t\033[32m\033[1m$@ is a valid IPv6 Address\033[m\n"
+else
+   echo -e "\n\t\033[31m\033[1m$@ is NOT a valid IPv6 Address\033[m\n"
+fi
+
+exit
+