dhcpv6: T3240: support per-interface client DUIDs

(cherry picked from commit b23323922939a9ac3b43e0761b0af84dc9e3b47e)

4 files changed, 43 insertions, 3 deletions

diff --git a/data/templates/dhcp-client/ipv6.tmpl b/data/templates/dhcp-client/ipv6.tmpl
index 68f668117..49d0d8c88 100644
--- a/data/templates/dhcp-client/ipv6.tmpl
+++ b/data/templates/dhcp-client/ipv6.tmpl
@@ -3,6 +3,9 @@
 # man https://www.unix.com/man-page/debian/5/dhcp6c.conf/
 interface {{ ifname }} {
 {% if address is defined and 'dhcpv6' in address %}
+{%   if dhcpv6_options is defined and dhcpv6_options.duid is defined and dhcpv6_options.duid is not none %}
+    send client-id {{ dhcpv6_options.duid }};
+{%   endif %}
     request domain-name-servers;
     request domain-name;
 {%   if dhcpv6_options is defined and dhcpv6_options.parameters_only is defined %}
diff --git a/interface-definitions/include/dhcpv6-options.xml.i b/interface-definitions/include/dhcpv6-options.xml.i
index 9a1016956..33ba39592 100644
--- a/interface-definitions/include/dhcpv6-options.xml.i
+++ b/interface-definitions/include/dhcpv6-options.xml.i
@@ -4,6 +4,18 @@
     <help>DHCPv6 client settings/options</help>
   </properties>
   <children>
+    <leafNode name="duid">
+      <properties>
+        <help>DHCP unique identifier (DUID) to be sent by dhcpv6 client</help>
+        <valueHelp>
+          <format>duid</format>
+          <description>DHCP unique identifier (DUID)</description>
+        </valueHelp>
+        <constraint>
+          <validator name="ipv6-duid"/>
+        </constraint>
+      </properties>
+    </leafNode>
     <leafNode name="parameters-only">
       <properties>
         <help>Acquire only config parameters, no address</help>
diff --git a/src/validators/ipv6-duid b/src/validators/ipv6-duid
new file mode 100755
index 000000000..fd4728e50
--- /dev/null
+++ b/src/validators/ipv6-duid
@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2021 VyOS maintainers and contributors
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 or later as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import re
+import sys
+
+pattern = "^([0-9A-Fa-f]{2}:){,127}([0-9A-Fa-f]{2})$"
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        sys.exit(1)
+    if not re.match(pattern, sys.argv[1]):
+        sys.exit(1)
+    sys.exit(0)
diff --git a/src/validators/mac-address b/src/validators/mac-address
index b2d3496f4..7d020f387 100755
--- a/src/validators/mac-address
+++ b/src/validators/mac-address
@@ -17,9 +17,7 @@
 import re
 import sys
 
-
-pattern = "^([0-9A-Fa-f]{2}[:]){5}([0-9A-Fa-f]{2})$"
-
+pattern = "^([0-9A-Fa-f]{2}:){5}([0-9A-Fa-f]{2})$"
 
 if __name__ == '__main__':
     if len(sys.argv) != 2: