From a43151a69c1482c1c10806e83271f94fb691199d Mon Sep 17 00:00:00 2001
From: Mohit Mehta <mohit.mehta@vyatta.com>
Date: Sat, 30 Aug 2008 16:13:53 +0000
Subject: prompt warning for no nameservers if no nameservers set and no
 interface set to use dhcp

---
 scripts/dns-forwarding/vyatta-dns-forwarding.pl | 46 +++++++++++++++++++++++--
 templates/service/dns/forwarding/dhcp/node.def  |  2 +-
 2 files changed, 45 insertions(+), 3 deletions(-)

diff --git a/scripts/dns-forwarding/vyatta-dns-forwarding.pl b/scripts/dns-forwarding/vyatta-dns-forwarding.pl
index 902e91bc..08cea70a 100644
--- a/scripts/dns-forwarding/vyatta-dns-forwarding.pl
+++ b/scripts/dns-forwarding/vyatta-dns-forwarding.pl
@@ -162,6 +162,47 @@ sub check_system_nameserver {
 
 }
 
+sub check_dhcp_any_interface {
+
+    my $config = new VyattaConfig;
+    $config->setLevel("interfaces ethernet");
+    my @eths = $config->listNodes(".");
+    foreach my $eth (@eths) {
+        $config->setLevel("interfaces ethernet $eth");
+        my @addrs = $config->returnOrigValues("address");
+        foreach my $addr (@addrs) {
+           if (defined $addr && $addr eq "dhcp") {
+              return 1;
+           }
+        }
+        my @vifs = $config->listNodes("vif");
+        foreach my $vif (@vifs) {
+           $config->setLevel("interfaces ethernet $eth vif $vif");
+           my @addrs = $config->returnOrigValues("address");
+           foreach my $addr (@addrs) {
+              if (defined $addr && $addr eq "dhcp") {
+                 return 1;
+              }
+           }
+        }
+    }
+
+    $config->setLevel("interfaces bridge");
+    my @bridges = $config->listNodes(".");
+    foreach my $bridge (@bridges) {
+        $config->setLevel("interfaces bridge $bridge");
+        my @addrs = $config->returnOrigValues("address");
+        foreach my $addr (@addrs) {
+           if (defined $addr && $addr eq "dhcp") {
+              return 1;
+           }
+        }
+    }
+
+    return 0;
+
+}
+
 sub is_dhcp_enabled {
     my $intf = shift;
 
@@ -246,8 +287,9 @@ if (defined $update_dnsforwarding) {
 
     if (!(defined $use_system_nameservers) && (@use_dhcp_nameservers == 0) && (@use_nameservers == 0)) {
        my $nameserver_exists = check_nameserver();
-       if ($nameserver_exists < 1){
-           print "DNS forwarding warning: No DNS servers ('system' or 'dhcp received') to forward queries.\n";
+       my $dhcp_enabled_any_interface = check_dhcp_any_interface();
+       if ($nameserver_exists < 1 && $dhcp_enabled_any_interface == 0){
+           print "DNS forwarding warning: No name-servers to forward DNS queries\n";
        }
     }
 
diff --git a/templates/service/dns/forwarding/dhcp/node.def b/templates/service/dns/forwarding/dhcp/node.def
index f56a51c2..8ce8c83f 100644
--- a/templates/service/dns/forwarding/dhcp/node.def
+++ b/templates/service/dns/forwarding/dhcp/node.def
@@ -1,6 +1,6 @@
 multi:
 type: txt
-help: Set to forward DNS queries to nameservers received from DHCP server for specified interface
+help: Set to use nameservers received from DHCP server for specified interface
 commit:expression: exec "/opt/vyatta/sbin/vyatta-dns-forwarding.pl --dhcp-interface $VAR(@)"
 allowed:
          local -a array ;
-- 
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