Fixed IPv6 validation special case: single colon

IPv6 parsing was incorrectly evaluating ':' as a valid IPv6 address.

https://fedorahosted.org/freeipa/ticket/1466

install/ui/net.js

@@ -125,6 +125,11 @@ NET.ip_address = function(spec) {
 
         var i;
 
+        //usecases like ':'
+        if (that.parts.length <= 2) {
+            return that.set_error('invalid format');
+        }
+
         for (i=0; i<that.parts.length; i++) {
             var part = that.parts[i];
 

install/ui/test/ip_tests.js

@@ -156,6 +156,9 @@ test('Testing incorrect IPv6 addresses', function() {
     address = NET.ip_address('2001:db8:85a3:0:0:8a2e:370');
     ok(!address.valid, 'Missing part - 2001:db8:85a3:0:0:8a2e:370');
 
+    address = NET.ip_address(':');
+    ok(!address.valid, 'Address - :');
+
     address = NET.ip_address('::1::');
     ok(!address.valid, 'Address - ::1::');