radvd: support nat64prefix; closes #7487 #8289

Author: fichtner

src/etc/inc/plugins.inc.d/radvd.inc

@@ -289,6 +289,11 @@ function radvd_configure_do($verbose = false, $ignorelist = [])
             }
         }
 
+        if (!$entry->nat64prefix->isEmpty()) {
+            $radvdconf .= "\tnat64prefix {$entry->nat64prefix->getValue()} {\n";
+            $radvdconf .= "\t};\n";
+        }
+
         $dnssl = [];
         $rdnss = [];
 

src/opnsense/mvc/app/controllers/OPNsense/Radvd/forms/dialogEntry.xml

@@ -98,6 +98,16 @@
             <visible>false</visible>
         </grid_view>
     </field>
+    <field>
+        <id>entries.nat64prefix</id>
+        <label>NAT64 prefix</label>
+        <type>text</type>
+        <help>The NAT64 prefix included in the router advertisements. The "well-known prefix" reserved for this service is 64:ff9b::/96.</help>
+        <advanced>true</advanced>
+        <grid_view>
+            <visible>false</visible>
+        </grid_view>
+    </field>
     <field>
         <id>entries.AdvLinkMTU</id>
         <label>Link MTU</label>

src/opnsense/mvc/app/models/OPNsense/Radvd/Radvd.php

@@ -49,6 +49,32 @@ public function performValidation($validateFullModel = false)
                 continue;
             }
 
+            $key = $entry->__reference;
+
+            if (!$entry->nat64prefix->isEmpty()) {
+                $prefix = $entry->nat64prefix->getValue();
+                if (strpos($prefix, '/') !== false) {
+                    $prefix = explode('/', $prefix);
+                    switch ($prefix[1]) {
+                        case '32':
+                        case '40':
+                        case '48':
+                        case '56':
+                        case '64':
+                        case '96':
+                            break;
+                        default:
+                            $messages->appendMessage(
+                                new Message(
+                                    gettext('Prefix size must be one of 32, 40, 48, 56, 64 or 96.'),
+                                    $key . '.nat64prefix'
+                                )
+                            );
+                            break;
+                    }
+                }
+            }
+
             $raMax = $entry->MaxRtrAdvInterval->asInt();
             if (
                 $raMax < $entry->MaxRtrAdvInterval->getMinimumvalue() ||
@@ -58,8 +84,6 @@ public function performValidation($validateFullModel = false)
                 continue;
             }
 
-            $key = $entry->__reference;
-
             $raMin = $entry->MinRtrAdvInterval->asInt();
             $raMinAllowed = (int)floor($raMax * 0.75);
 

src/opnsense/mvc/app/models/OPNsense/Radvd/Radvd.xml

@@ -115,6 +115,10 @@
                     <high>High</high>
                 </OptionValues>
             </AdvDefaultPreference>
+            <nat64prefix type="NetworkField">
+                <NetMaskRequired>Y</NetMaskRequired>
+                <AddressFamily>ipv6</AddressFamily>
+            </nat64prefix>
         </entries>
     </items>
 </model>