1 files changed, 81 insertions, 0 deletions
diff --git a/src/migration-scripts/system/18-to-19 b/src/migration-scripts/system/18-to-19
new file mode 100644
index 0000000..5d9788d
--- /dev/null
+++ b/src/migration-scripts/system/18-to-19
@@ -0,0 +1,81 @@
+# Copyright 2020-2024 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
+
+# migrate disable-dhcp-nameservers (boolean) to name-servers-dhcp <interface>
+# if disable-dhcp-nameservers is set, just remove it
+# else retrieve all interface names that have configured dhcp(v6) address and
+# add them to the new name-servers-dhcp node
+
+from vyos.ifconfig import Interface
+from vyos.configtree import ConfigTree
+
+base = ['system']
+
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    if config.exists(base + ['disable-dhcp-nameservers']):
+        config.delete(base + ['disable-dhcp-nameservers'])
+    else:
+        dhcp_interfaces = []
+
+        # go through all interfaces searching for 'address dhcp(v6)?'
+        for sect in Interface.sections():
+            sect_base = ['interfaces', sect]
+
+            if not config.exists(sect_base):
+                continue
+
+            for intf in config.list_nodes(sect_base):
+                intf_base = sect_base + [intf]
+
+                # try without vlans
+                if config.exists(intf_base + ['address']):
+                    for addr in config.return_values(intf_base + ['address']):
+                        if addr in ['dhcp', 'dhcpv6']:
+                            dhcp_interfaces.append(intf)
+
+                # try vif
+                if config.exists(intf_base + ['vif']):
+                    for vif in config.list_nodes(intf_base + ['vif']):
+                        vif_base = intf_base + ['vif', vif]
+                        if config.exists(vif_base + ['address']):
+                            for addr in config.return_values(vif_base + ['address']):
+                                if addr in ['dhcp', 'dhcpv6']:
+                                    dhcp_interfaces.append(f'{intf}.{vif}')
+
+                # try vif-s
+                if config.exists(intf_base + ['vif-s']):
+                    for vif_s in config.list_nodes(intf_base + ['vif-s']):
+                        vif_s_base = intf_base + ['vif-s', vif_s]
+                        if config.exists(vif_s_base + ['address']):
+                            for addr in config.return_values(vif_s_base + ['address']):
+                                if addr in ['dhcp', 'dhcpv6']:
+                                    dhcp_interfaces.append(f'{intf}.{vif_s}')
+
+                    # try vif-c
+                    if config.exists(intf_base + ['vif-c']):
+                        for vif_c in config.list_nodes(vif_s_base + ['vif-c']):
+                            vif_c_base = vif_s_base + ['vif-c', vif_c]
+                            if config.exists(vif_c_base + ['address']):
+                                for addr in config.return_values(vif_c_base + ['address']):
+                                    if addr in ['dhcp', 'dhcpv6']:
+                                        dhcp_interfaces.append(f'{intf}.{vif_s}.{vif_c}')
+
+        # set new config nodes
+        for intf in dhcp_interfaces:
+            config.set(base + ['name-servers-dhcp'], value=intf, replace=False)