+ if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
+ die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
+ return;
+ }
+
+ if ($str =~ m/^${ip_alias_pattern}$/) {
+ die "alias name too long\n" if length($str) > $max_alias_name_length;
+ return;
+ }