system: allow up to 8 nameservers

src/etc/inc/system.inc

@@ -201,7 +201,7 @@ function system_resolvconf_generate($verbose = false)
     chmod('/etc/resolv.conf', 0644);
 
     /* setup static routes for DNS servers. */
-    for ($dnscounter=1; $dnscounter<5; $dnscounter++) {
+    for ($dnscounter = 1; $dnscounter < 9; $dnscounter++) {
         /* setup static routes for dns servers */
         $dnsgw = "dns{$dnscounter}gw";
         if (isset($config['system'][$dnsgw])) {

src/www/system_general.php

@@ -40,10 +40,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         $savemsg = htmlspecialchars(gettext($_GET['savemsg']));
     }
 
-    $pconfig['dns1gw'] = null;
-    $pconfig['dns2gw'] = null;
-    $pconfig['dns3gw'] = null;
-    $pconfig['dns4gw'] = null ;
     $pconfig['theme'] = null;
     $pconfig['language'] = null;
     $pconfig['timezone'] = "Etc/UTC";
@@ -52,17 +48,12 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     $pconfig['hostname'] = $config['system']['hostname'];
     $pconfig['domain'] = $config['system']['domain'];
 
-    if (isset($config['system']['dnsserver'])) {
-        list($pconfig['dns1'],$pconfig['dns2'],$pconfig['dns3'],$pconfig['dns4']) = $config['system']['dnsserver'];
-    } else {
-        list($pconfig['dns1'],$pconfig['dns2'],$pconfig['dns3'],$pconfig['dns4']) = null;
-    }
-    foreach (array('dns1gw', 'dns2gw', 'dns3gw', 'dns4gw') as $dnsgwopt) {
-        if (!empty($config['system'][$dnsgwopt])) {
-            $pconfig[$dnsgwopt] = $config['system'][$dnsgwopt];
-        } else {
-            $pconfig[$dnsgwopt] = "none";
-        }
+    for ($dnscounter = 1; $dnscounter < 9; $dnscounter++) {
+        $dnsname = "dns{$dnscounter}";
+        $pconfig[$dnsname] = !empty($config['system']['dnsserver'][$dnscounter - 1]) ? $config['system']['dnsserver'][$dnscounter - 1] : null;
+
+        $dnsgwname= "dns{$dnscounter}gw";
+        $pconfig[$dnsgwopt] = !empty($config['system'][$dnsgwopt]) ? $config['system'][$dnsgwopt] : 'none';
     }
 
     $pconfig['dnsallowoverride'] = isset($config['system']['dnsallowoverride']);
@@ -96,7 +87,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
 
     $ignore_posted_dnsgw = array();
 
-    for ($dnscounter=1; $dnscounter<5; $dnscounter++){
+    for ($dnscounter = 1; $dnscounter < 9; $dnscounter++){
       $dnsname="dns{$dnscounter}";
       $dnsgwname="dns{$dnscounter}gw";
       if (!empty($pconfig[$dnsname]) && !is_ipaddr($pconfig[$dnsname])) {
@@ -118,7 +109,7 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
     }
     /* XXX cranky low-level call, please refactor */
     $direct_networks_list = explode(' ', filter_get_direct_networks_list(filter_generate_optcfg_array()));
-    for ($dnscounter=1; $dnscounter<5; $dnscounter++) {
+    for ($dnscounter = 1; $dnscounter < 9; $dnscounter++) {
         $dnsitem = "dns{$dnscounter}";
         $dnsgwitem = "dns{$dnscounter}gw";
         if (!empty($pconfig[$dnsgwitem])) {
@@ -154,14 +145,6 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
             unset($config['system']['gw_switch_default']);
         }
 
-        $olddnsservers = $config['system']['dnsserver'];
-        $config['system']['dnsserver'] = array();
-        foreach (array('dns1', 'dns2', 'dns3', 'dns4') as $dnsopt) {
-            if (!empty($pconfig[$dnsopt])) {
-                $config['system']['dnsserver'][] = $pconfig[$dnsopt];
-            }
-        }
-
         $config['system']['dnsallowoverride'] = !empty($pconfig['dnsallowoverride']);
 
         if($pconfig['dnslocalhost'] == "yes") {
@@ -170,13 +153,19 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
             unset($config['system']['dnslocalhost']);
         }
 
-        /* which interface should the dns servers resolve through? */
+        $olddnsservers = $config['system']['dnsserver'];
+        $config['system']['dnsserver'] = array();
+
         $outdnscounter = 0;
-        for ($dnscounter=1; $dnscounter<5; $dnscounter++) {
+        for ($dnscounter = 1; $dnscounter < 9; $dnscounter++) {
             $dnsname="dns{$dnscounter}";
             $dnsgwname="dns{$dnscounter}gw";
             $olddnsgwname = !empty($config['system'][$dnsgwname]) ? $config['system'][$dnsgwname] : "none" ;
 
+            if (!empty($pconfig[$dnsname])) {
+                $config['system']['dnsserver'][] = $pconfig[$dnsname];
+            }
+
             if ($ignore_posted_dnsgw[$dnsgwname]) {
                 $thisdnsgwname = "none";
             } else {
@@ -383,7 +372,7 @@ include("head.inc");
                   </thead>
                   <tbody>
 <?php
-                    for ($dnscounter=1; $dnscounter<5; $dnscounter++):
+                    for ($dnscounter = 1; $dnscounter < 9; $dnscounter++):
                       $dnsgw = "dns{$dnscounter}gw";?>
                     <tr>
                       <td>