Set default dhcp interface on page load

app/js/custom.js

@@ -223,7 +223,7 @@ function contentLoaded() {
         case "hostapd_conf":
             loadChannel();
         case "dhcpd_conf":
-            loadInterfaceDHCPSelect('wlan0');
+            loadInterfaceDHCPSelect();
         break;
     }
 }
@@ -240,9 +240,8 @@ function loadWifiStations(refresh) {
 }
 $(".js-reload-wifi-stations").on("click", loadWifiStations(true));
 
-function loadInterfaceDHCPSelect(default_iface) {
-    var iface = (default_iface) ? default_iface : $('#cbxdhcpiface').val();
-    $('#cbxdhcpiface').val(iface);
+function loadInterfaceDHCPSelect() {
+    var iface = $('#cbxdhcpiface').val();
     $.get('ajax/networking/get_netcfg.php?iface='+iface,function(data){
         jsonData = JSON.parse(data);
         $('#dhcp-iface')[0].checked = jsonData.DHCPEnabled;

includes/dhcp.php

@@ -44,17 +44,18 @@ function DisplayDHCPConfig()
             }
         }
     }
-
+    getWifiInterface();
     $serviceStatus = $dnsmasq_state ? "up" : "down";
     exec("ip -o link show | awk -F': ' '{print $2}'", $interfaces);
     exec('cat ' . RASPI_DNSMASQ_LEASES, $leases);
+    $ap_iface = $_SESSION['ap_interface'];
 
     echo renderTemplate(
         "dhcp", compact(
             "status",
             "serviceStatus",
             "dnsmasq_state",
-            "conf",
+            "ap_iface",
             "dhcpHost",
             "interfaces",
             "leases"

templates/dhcp/general.php

@@ -3,7 +3,7 @@
   <div class="row">
     <div class="form-group col-md-6">
       <label for="code">Interface</label>
-        <?php SelectorOptions('interface', $interfaces, $conf['interface'], 'cbxdhcpiface', 'loadInterfaceDHCPSelect', $DHCPDisabled); ?>
+        <?php SelectorOptions('interface', $interfaces, $ap_iface, 'cbxdhcpiface', 'loadInterfaceDHCPSelect', $DHCPDisabled); ?>
     </div>
   </div>