fix address ranges for sites with old NetAddr::IP versions, #26868

1 files changed, 5 insertions, 0 deletions

diff --git a/httemplate/edit/process/addr_range.html b/httemplate/edit/process/addr_range.html
index 6b05d23..5df0559 100644
--- a/httemplate/edit/process/addr_range.html
+++ b/httemplate/edit/process/addr_range.html
@@ -13,6 +13,11 @@
         $cgi->param('end', $end->addr);
         $cgi->param('start', $start->addr);
       }
+      if ( $start + 0x7FFFFFFF <= $end ) {
+        # then this is going to overflow
+        return "Address ranges must be < 2^31 - 1 addresses long."
+      }
+
       $cgi->param('length', $end - $start + 1);
     } else {
       $cgi->param('length', 1);