cname lengths issues

app/models/cname.rb

@@ -8,7 +8,9 @@
 # Obtained from http://www.zytrax.com/books/dns/ch8/cname.html
 #
 class CNAME < Record
-  validates :name, :hostname =>  {:allow_underscore => true, :allow_wildcard_hostname => true}
+  validates :name,
+    :length => { :maximum => 1024 }, 
+    :hostname2 =>  { :allow_underscore => true, :allow_wildcard_hostname => true }
   validates :content, :presence => true, :hostname => true
 
 end

app/validators/hostname2_validator.rb

@@ -0,0 +1,47 @@
+# skips length validations
+class Hostname2Validator < PAK::ValidatesHostname::HostnameValidator
+
+  def validate_each(record, attribute, value)
+    value ||= ''
+    
+    # split each hostname into labels and do various checks
+    if value.is_a?(String)
+      labels = value.split '.'
+      labels.each_with_index do |label, index|
+
+        # CHECK 2: hostname label cannot begin or end with hyphen
+        add_error(record, attribute, :label_begins_or_ends_with_hyphen) if label =~ /^[-]/i or label =~ /[-]$/
+
+        # Take care of wildcard first label
+        next if options[:allow_wildcard_hostname] and label == '*' and index == 0
+
+        # CHECK 3: hostname can only contain characters: 
+        #          a-z, 0-9, hyphen, optional underscore, optional asterisk
+        valid_chars = 'a-z0-9\-'
+        valid_chars << '_' if options[:allow_underscore] == true
+        add_error(record, attribute, :label_contains_invalid_characters, :valid_chars => valid_chars) unless label =~ /^[#{valid_chars}]+$/i
+      end
+
+      # CHECK 4: the unqualified hostname portion cannot consist of 
+      #          numeric values only
+      if options[:allow_numeric_hostname] == false
+        is_numeric_only = (
+          (
+            Integer(labels[0]) rescue false
+          ) ? true : false
+        )
+        add_error(record, attribute, :hostname_label_is_numeric) if is_numeric_only
+      end
+
+      # CHECK 5: in order to be fully qualified, the full hostname's
+      #          TLD must be valid
+      if options[:require_valid_tld] == true
+        has_tld = options[:valid_tlds].select {
+          |tld| tld =~ /^#{Regexp.escape(labels.last || '')}$/i
+        }.empty? ? false : true
+        add_error(record, attribute, :hostname_is_not_fqdn) unless has_tld
+      end
+    end
+  end
+  
+end