1 files changed, 58 insertions, 0 deletions
diff --git a/src/migration-scripts/dhcp-server/6-to-7 b/src/migration-scripts/dhcp-server/6-to-7
new file mode 100644
index 0000000..4e6583a
--- /dev/null
+++ b/src/migration-scripts/dhcp-server/6-to-7
@@ -0,0 +1,58 @@
+# Copyright 2022-2024 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/>.
+
+# T6079: Disable duplicate static mappings
+
+from vyos.configtree import ConfigTree
+
+base = ['service', 'dhcp-server']
+
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base + ['shared-network-name']):
+        # Nothing to do
+        return
+
+    # Run this for every instance if 'shared-network-name'
+    for network in config.list_nodes(base + ['shared-network-name']):
+        base_network = base + ['shared-network-name', network]
+
+        if not config.exists(base_network + ['subnet']):
+            continue
+
+        for subnet in config.list_nodes(base_network + ['subnet']):
+            base_subnet = base_network + ['subnet', subnet]
+
+            if config.exists(base_subnet + ['static-mapping']):
+                used_mac = []
+                used_ip = []
+
+                for mapping in config.list_nodes(base_subnet + ['static-mapping']):
+                    base_mapping = base_subnet + ['static-mapping', mapping]
+
+                    if config.exists(base_mapping + ['mac-address']):
+                        mac = config.return_value(base_mapping + ['mac-address'])
+
+                        if mac in used_mac:
+                            config.set(base_mapping + ['disable'])
+                        else:
+                            used_mac.append(mac)
+
+                    if config.exists(base_mapping + ['ip-address']):
+                        ip = config.return_value(base_mapping + ['ip-address'])
+
+                        if ip in used_ip:
+                            config.set(base_subnet + ['static-mapping', mapping, 'disable'])
+                        else:
+                            used_ip.append(ip)