- return $_[0] =~ /^(?:(?:\:\:)?\d+\.\d+\.\d+\.\d+)|(?:[0-9a-f]{1,4}\:)?(?:\:[0-9a-f]{1,4}(?:\:\:)?){1,6}$/i;
+
+ if ($_[0] =~ /:/) {
+ if (inet_pton(AF_INET6, $_[0])) {
+ return ($_[0] =~ /([:0-9a-f]+)/);
+ }
+# use re 'debug';
+# return ($1) if $_[0] =~ /^(\:?(?:\:?[0-9a-f]{1,4}){1,8}?)$/i;
+# no re 'debug';
+ } else {
+ return ($_[0] =~ /^(\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})$/);
+ }
+ return undef;