interface offloading, add txcsum6, trxcsum6 for https://github.com/opnsense/core/issues/1227

(cherry picked from commit a801eb11)

src/etc/inc/interfaces.lib.inc

@@ -245,6 +245,7 @@ function configure_interface_hardware($ifs)
     if (!stristr($ifs, "_vlan") && is_array($intf_details)) {
         // get current settings
         $csum_set = in_array('rxcsum', $intf_details['options']) || in_array('txcsum', $intf_details['options']);
+        $csumv6_set = in_array('rxcsum6', $intf_details['options']) || in_array('txcsum6', $intf_details['options']);
         $tso_set = in_array('tso4', $intf_details['options']) || in_array('tso6', $intf_details['options']);
         $lro_set = in_array('lro', $intf_details['options']);
 
@@ -254,6 +255,12 @@ function configure_interface_hardware($ifs)
         } elseif (!isset($config['system']['disablechecksumoffloading']) && !$csum_set) {
             legacy_interface_flags($ifs, 'txcsum rxcsum', false);
         }
+        if (isset($config['system']['disablechecksumoffloading']) && $csumv6_set) {
+            legacy_interface_flags($ifs, '-txcsum6 -rxcsum6', false);
+        } elseif (!isset($config['system']['disablechecksumoffloading']) && !$csumv6_set) {
+            legacy_interface_flags($ifs, 'txcsum6 rxcsum6', false);
+        }
+
         // TCP segmentation offloading
         if (isset($config['system']['disablesegmentationoffloading']) && $tso_set) {
             legacy_interface_flags($ifs, '-tso', false);