bgp: T3759: add l3vpn "label vpn export" commands

Add the following new commands:
* set protocols bgp address-family ipv4-unicast label vpn export (auto | 0-1048575)
* set protocols bgp address-family ipv6-unicast label vpn export (auto | 0-1048575)

4 files changed, 48 insertions, 4 deletions

diff --git a/data/templates/frr/bgpd.frr.tmpl b/data/templates/frr/bgpd.frr.tmpl
index 2f2e94ce0..3ee6a5cb3 100644
--- a/data/templates/frr/bgpd.frr.tmpl
+++ b/data/templates/frr/bgpd.frr.tmpl
@@ -321,6 +321,9 @@ router bgp {{ local_as }} {{ 'vrf ' ~ vrf if vrf is defined and vrf is not none
 {%         endfor %}
 {%       endif %}
 {%     endif %}
+{%     if afi_config.label is defined and afi_config.label.vpn is defined and afi_config.label.vpn.export is defined and afi_config.label.vpn.export is not none %}
+ label vpn export {{ afi_config.label.vpn.export }}
+{%     endif %}
 {%     if afi_config.local_install is defined and afi_config.local_install is not none %}
 {%       for interface in afi_config.local_install.interface %}
  local-install {{ interface }}
diff --git a/interface-definitions/include/bgp/afi-label.xml.i b/interface-definitions/include/bgp/afi-label.xml.i
new file mode 100644
index 000000000..f8cf57a9c
--- /dev/null
+++ b/interface-definitions/include/bgp/afi-label.xml.i
@@ -0,0 +1,36 @@
+<!-- include start from bgp/afi-label.xml.i -->
+<node name="label">
+  <properties>
+    <help>Label value for VRF</help>
+  </properties>
+  <children>
+    <node name="vpn">
+      <properties>
+        <help>Between current address-family and vpn</help>
+      </properties>
+      <children>
+        <leafNode name="export">
+          <properties>
+            <help>For routes leaked from current address-family to VPN</help>
+            <completionHelp>
+              <list>auto</list>
+            </completionHelp>
+            <valueHelp>
+              <format>auto</format>
+              <description>Automatically assign a label</description>
+            </valueHelp>
+            <valueHelp>
+              <format>u32:0-1048575</format>
+              <description>Label Value</description>
+            </valueHelp>
+            <constraint>
+              <validator name="numeric" argument="--range 0-1048575"/>
+              <regex>^(auto)$</regex>
+            </constraint>
+          </properties>
+        </leafNode>
+      </children>
+    </node>
+  </children>
+</node>
+<!-- include end -->
diff --git a/interface-definitions/include/bgp/protocol-common-config.xml.i b/interface-definitions/include/bgp/protocol-common-config.xml.i
index 6a4e1de3f..58e3c5798 100644
--- a/interface-definitions/include/bgp/protocol-common-config.xml.i
+++ b/interface-definitions/include/bgp/protocol-common-config.xml.i
@@ -94,6 +94,8 @@
           </children>
         </node>
         #include <include/bgp/afi-export-import.xml.i>
+        #include <include/bgp/afi-label.xml.i>
+        #include <include/bgp/afi-maximum-paths.xml.i>
         <tagNode name="network">
           <properties>
             <help>BGP network</help>
@@ -115,7 +117,6 @@
             #include <include/route-map.xml.i>
           </children>
         </tagNode>
-        #include <include/bgp/afi-maximum-paths.xml.i>
         <node name="redistribute">
           <properties>
             <help>Redistribute routes from other protocols into BGP</help>
@@ -480,6 +481,8 @@
           </children>
         </node>
         #include <include/bgp/afi-export-import.xml.i>
+        #include <include/bgp/afi-label.xml.i>
+        #include <include/bgp/afi-maximum-paths.xml.i>
         <tagNode name="network">
           <properties>
             <help>BGP network</help>
@@ -496,7 +499,6 @@
             #include <include/route-map.xml.i>
           </children>
         </tagNode>
-        #include <include/bgp/afi-maximum-paths.xml.i>
         <node name="redistribute">
           <properties>
             <help>Redistribute routes from other protocols into BGP</help>
diff --git a/smoketest/scripts/cli/test_protocols_bgp.py b/smoketest/scripts/cli/test_protocols_bgp.py
index 7a470abf9..d3d061229 100755
--- a/smoketest/scripts/cli/test_protocols_bgp.py
+++ b/smoketest/scripts/cli/test_protocols_bgp.py
@@ -730,11 +730,14 @@ class TestProtocolsBGP(VyOSUnitTestSHIM.TestCase):
         remote_asn = str(int(ASN) + 150)
         neighbor = '192.0.2.55'
         vrf_name = 'red'
+        label = 'auto'
 
         self.cli_set(base_path + ['local-as', ASN])
         # testing only one AFI is sufficient as it's generic code
-        self.cli_set(base_path + ['address-family', 'ipv6-unicast', 'export', 'vpn'])
-        self.cli_set(base_path + ['address-family', 'ipv6-unicast', 'import', 'vpn'])
+        for afi in ['ipv4-unicast', 'ipv6-unicast']:
+            self.cli_set(base_path + ['address-family', afi, 'export', 'vpn'])
+            self.cli_set(base_path + ['address-family', afi, 'import', 'vpn'])
+            self.cli_set(base_path + ['address-family', afi, 'label', 'vpn', 'export', label])
 
         # commit changes
         self.cli_commit()