From 4e8fa34544c8768e47da21d9fa386741f7ba10be Mon Sep 17 00:00:00 2001
From: sever-sever <v.gletenko@vyos.io>
Date: Tue, 2 Mar 2021 08:34:13 +0000
Subject: dhcpv6-server: T3379: Add option global-parameters name-server

(cherry picked from commit 117533482d29ce0bd1bc7f3a3f2536921c16565c)
---
 data/templates/dhcp-server/dhcpdv6.conf.tmpl        |  6 ++++++
 interface-definitions/dhcpv6-server.xml.in          | 20 ++++++++++++++++++++
 smoketest/scripts/cli/test_service_dhcpv6-server.py | 21 +++++++++++++++++++++
 3 files changed, 47 insertions(+)

diff --git a/data/templates/dhcp-server/dhcpdv6.conf.tmpl b/data/templates/dhcp-server/dhcpdv6.conf.tmpl
index de7c9b29c..25e5fa592 100644
--- a/data/templates/dhcp-server/dhcpdv6.conf.tmpl
+++ b/data/templates/dhcp-server/dhcpdv6.conf.tmpl
@@ -8,6 +8,12 @@ log-facility local7;
 option dhcp6.preference {{ preference }};
 {% endif %}
 
+{% if global_parameters is defined and global_parameters.name_server is defined and global_parameters.name_server is not none %}
+{%   for nameserver in global_parameters.name_server %}
+option dhcp6.name-servers {{ nameserver }};
+{%   endfor %}
+{% endif %}
+
 # Shared network configration(s)
 {% if shared_network_name is defined and shared_network_name is not none %}
 {%   for network, network_config in shared_network_name.items() if network_config.disable is not defined %}
diff --git a/interface-definitions/dhcpv6-server.xml.in b/interface-definitions/dhcpv6-server.xml.in
index fb0e79c47..a3cca06da 100644
--- a/interface-definitions/dhcpv6-server.xml.in
+++ b/interface-definitions/dhcpv6-server.xml.in
@@ -10,6 +10,26 @@
         </properties>
         <children>
           #include <include/generic-disable-node.xml.i>
+          <node name="global-parameters">
+            <properties>
+              <help>Additional global parameters for DHCPv6 server</help>
+            </properties>
+            <children>
+              <leafNode name="name-server">
+                <properties>
+                  <help>IPv6 address of a Recursive DNS Server</help>
+                  <valueHelp>
+                    <format>ipv6</format>
+                    <description>IPv6 address of DNS name server</description>
+                  </valueHelp>
+                  <constraint>
+                    <validator name="ipv6-address"/>
+                  </constraint>
+                  <multi/>
+                </properties>
+              </leafNode>
+            </children>
+          </node>
           <leafNode name="preference">
             <properties>
               <help>Preference of this DHCPv6 server compared with others</help>
diff --git a/smoketest/scripts/cli/test_service_dhcpv6-server.py b/smoketest/scripts/cli/test_service_dhcpv6-server.py
index 319891a94..a364eee11 100755
--- a/smoketest/scripts/cli/test_service_dhcpv6-server.py
+++ b/smoketest/scripts/cli/test_service_dhcpv6-server.py
@@ -151,5 +151,26 @@ class TestServiceDHCPServer(unittest.TestCase):
         # Check for running process
         self.assertTrue(process_named_running(PROCESS_NAME))
 
+    def test_global_nameserver(self):
+        shared_net_name = 'SMOKE-3'
+        ns_global_1 = '2001:db8::1111'
+        ns_global_2 = '2001:db8::2222'
+
+        self.session.set(base_path + ['global-parameters', 'name-server', ns_global_1])
+        self.session.set(base_path + ['global-parameters', 'name-server', ns_global_2])
+        self.session.set(base_path + ['shared-network-name', shared_net_name, 'subnet', subnet])
+
+        # commit changes
+        self.session.commit()
+
+        config = read_file(DHCPD_CONF)
+        self.assertIn(f'option dhcp6.name-servers {ns_global_1};', config)
+        self.assertIn(f'option dhcp6.name-servers {ns_global_2};', config)
+        self.assertIn(f'subnet6 {subnet}' + r' {', config)
+        self.assertIn(f'set shared-networkname = "{shared_net_name}";', config)
+
+        # Check for running process
+        self.assertTrue(process_named_running(PROCESS_NAME))
+
 if __name__ == '__main__':
     unittest.main(verbosity=2)
-- 
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