1 files changed, 87 insertions, 0 deletions
diff --git a/src/migration-scripts/dhcp-server/5-to-6 b/src/migration-scripts/dhcp-server/5-to-6
new file mode 100755
index 000000000..aefe84737
--- /dev/null
+++ b/src/migration-scripts/dhcp-server/5-to-6
@@ -0,0 +1,87 @@
+#!/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/>.
+
+# T1968: allow multiple static-routes to be configured
+# T3838: rename dns-server -> name-server
+
+import sys
+from vyos.configtree import ConfigTree
+
+if (len(sys.argv) < 1):
+    print("Must specify file name!")
+    sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+base = ['service', 'dhcp-server']
+config = ConfigTree(config_file)
+
+if not config.exists(base + ['shared-network-name']):
+    # Nothing to do
+    exit(0)
+
+# 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
+
+    # Run this for every specified 'subnet'
+    for subnet in config.list_nodes(base_network + ['subnet']):
+        base_subnet = base_network + ['subnet', subnet]
+
+        # T1968: allow multiple static-routes to be configured
+        if config.exists(base_subnet + ['static-route']):
+            prefix = config.return_value(base_subnet + ['static-route', 'destination-subnet'])
+            router = config.return_value(base_subnet + ['static-route', 'router'])
+            config.delete(base_subnet + ['static-route'])
+
+            config.set(base_subnet + ['static-route', prefix, 'next-hop'], value=router)
+            config.set_tag(base_subnet + ['static-route'])
+
+        # T3838: rename dns-server -> name-server
+        if config.exists(base_subnet + ['dns-server']):
+            config.rename(base_subnet + ['dns-server'], 'name-server')
+
+
+        # T3672: ISC DHCP server only supports one failover peer
+        if config.exists(base_subnet + ['failover']):
+            # There can only be one failover configuration, if none is present
+            # we add the first one
+            if not config.exists(base + ['failover']):
+                local = config.return_value(base_subnet + ['failover', 'local-address'])
+                remote = config.return_value(base_subnet + ['failover', 'peer-address'])
+                status = config.return_value(base_subnet + ['failover', 'status'])
+                name = config.return_value(base_subnet + ['failover', 'name'])
+
+                config.set(base + ['failover', 'remote'], value=remote)
+                config.set(base + ['failover', 'source-address'], value=local)
+                config.set(base + ['failover', 'status'], value=status)
+                config.set(base + ['failover', 'name'], value=name)
+
+            config.delete(base_subnet + ['failover'])
+            config.set(base_subnet + ['enable-failover'])
+
+try:
+    with open(file_name, 'w') as f:
+        f.write(config.to_string())
+except OSError as e:
+    print("Failed to save the modified config: {}".format(e))
+    exit(1)