src: fix a few crash reports

src/etc/inc/unbound.inc

@@ -73,6 +73,7 @@ function unbound_optimization() {
      * Larger socket buffer for busy servers
      * Check that it is set to 4MB (by default the OS has it configured to 4MB)
      */
+    if (isset($config['sysctl']['item'])) {
         foreach ($config['sysctl']['item'] as $tunable) {
             if ($tunable['tunable'] == 'kern.ipc.maxsockbuf') {
                 $so = floor(($tunable['value']/1024/1024)-1);
@@ -88,9 +89,9 @@ function unbound_optimization() {
         if (!isset($optimization['so_rcvbuf'])) {
             $optimization['so_rcvbuf'] = "#so-rcvbuf: 4m";
         }
+    }
 
     return $optimization;
-
 }
 
 function bootstrap_unbound_root()
@@ -701,7 +702,7 @@ function unbound_acls_config() {
     }
 
     // Configure the custom ACLs
-    if (is_array($config['unbound']['acls'])) {
+    if (isset($config['unbound']['acls'])) {
         foreach($config['unbound']['acls'] as $unbound_acl) {
             $aclcfg .= "#{$unbound_acl['aclname']}\n";
             foreach($unbound_acl['row'] as $network) {

src/www/carp_status.php

@@ -34,6 +34,7 @@ require_once("interfaces.inc");
 function interfaces_carp_set_maintenancemode($carp_maintenancemode)
 {
     global $config;
+
     if (isset($config["virtualip_carp_maintenancemode"]) && $carp_maintenancemode == false) {
         unset($config["virtualip_carp_maintenancemode"]);
         write_config("Leave CARP maintenance mode");
@@ -42,12 +43,14 @@ function interfaces_carp_set_maintenancemode($carp_maintenancemode)
         write_config("Enter CARP maintenance mode");
     }
 
+    if (isset($config['virtualip']['vip'])) {
         $viparr = &$config['virtualip']['vip'];
         foreach ($viparr as $vip) {
-        if ($vip['mode'] == "carp") {
+            if ($vip['mode'] == 'carp') {
                 interface_carp_configure($vip);
             }
         }
+    }
 }
 
 // init $config['virtualip']['vip']

src/www/services_unbound.php

@@ -212,9 +212,10 @@ function show_advanced_dns() {
 														<option value="" <?php if (empty($pconfig['active_interface']) || empty($pconfig['active_interface'][0])) echo 'selected="selected"'; ?>>All</option>
 														<?php
 															foreach ($interface_addresses as $laddr):
-																$selected = "";
-																if (in_array($laddr['value'], $pconfig['active_interface']))
+																$selected = '';
+																if (!empty($pconfig['active_interface']) && in_array($laddr['value'], $pconfig['active_interface'])) {
 																	$selected = 'selected="selected"';
+																}
 														?>
 														<option value="<?=$laddr['value'];?>" <?=$selected;?>>
 															<?=htmlspecialchars($laddr['name']);?>
@@ -237,9 +238,10 @@ function show_advanced_dns() {
 														<option value="" <?php if (empty($pconfig['outgoing_interface']) || empty($pconfig['outgoing_interface'][0])) echo 'selected="selected"'; ?>>All</option>
 														<?php
 															foreach ($interface_addresses as $laddr):
-																$selected = "";
-																if (in_array($laddr['value'], $pconfig['outgoing_interface']))
+																$selected = '';
+																if (!empty($pconfig['outgoing_interface']) && in_array($laddr['value'], $pconfig['outgoing_interface'])) {
 																	$selected = 'selected="selected"';
+																}
 														?>
 														<option value="<?=$laddr['value'];?>" <?=$selected;?>>
 															<?=htmlspecialchars($laddr['name']);?>