(legacy) regression, fix copy in firewall_nat_edit.php

src/www/firewall_nat_edit.php

@@ -100,11 +100,11 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     if (isset($_GET['id']) && is_numericint($_GET['id']) && isset($a_nat[$_GET['id']])) {
         $id = $_GET['id'];
         $configId = $id; // load form data from id
-    } else if (isset($_GET['dup']) && is_numericint($_GET['dup']) && isset($a_nat[$_GET['id']])){
+    } else if (isset($_GET['dup']) && isset($a_nat[$_GET['dup']])){
         $after = $_GET['dup'];
         $configId = $_GET['dup']; // load form data from id
     }
-    if (isset($_GET['after']) && (is_numericint($_GET['after']) || $_GET['after'] == "-1")) {
+    if (isset($_GET['after']) && isset($a_nat[$_GET['after']])) {
         $after = $_GET['after'];
     }
 
@@ -166,11 +166,12 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     $pconfig = $_POST;
     $input_errors = array();
     // validate id and store if usable
-    if (isset($_POST['id']) && is_numericint($_POST['id']) && isset($a_nat[$_POST['id']])) {
+    if (isset($pconfig['id']) && is_numericint($pconfig['id']) && isset($a_nat[$pconfig['id']])) {
         $id = $_POST['id'];
     }
-    if (isset($_POST['after']) && (is_numericint($_POST['after']) || $_POST['after'] == "-1")) {
-        $after = $_POST['after'];
+    if (isset($pconfig['after']) && isset($a_nat[$pconfig['after']])) {
+				// place record after provided sequence number
+				$after = $pconfig['after'];
 		}
 
     /* Validate input data  */
@@ -375,7 +376,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
             $a_nat[$id] = $natent;
         } else {
             $natent['created'] = make_config_revision_entry();
-            if (is_numeric($after)) {
+            if (isset($after)) {
                 array_splice($a_nat, $after+1, 0, array($natent));
             } else {
                 $a_nat[] = $natent;
@@ -969,7 +970,7 @@ $( document ).ready(function() {
                     <input name="id" type="hidden" value="<?=$id;?>" />
                     <?php endif; ?>
                     <?php if (isset($after)) : ?>
-                    <input name="after" type="hidden" value="<?=htmlspecialchars($after);?>" />
+                    <input name="after" type="hidden" value="<?=$after;?>" />
                     <?php endif; ?>
                   </td>
                 </tr>