nat: T2198: migrate "log enable" node to only "log"

1 files changed, 58 insertions, 0 deletions

diff --git a/src/migration-scripts/nat/4-to-5 b/src/migration-scripts/nat/4-to-5
new file mode 100755
index 000000000..dda191719
--- /dev/null
+++ b/src/migration-scripts/nat/4-to-5
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020 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/>.
+
+# Drop the enable/disable from the nat "log" node. If log node is specified
+# it is "enabled"
+
+from sys import argv,exit
+from vyos.configtree import ConfigTree
+
+if (len(argv) < 1):
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+config = ConfigTree(config_file)
+
+if not config.exists(['nat']):
+    # Nothing to do
+    exit(0)
+else:
+    for direction in ['source', 'destination']:
+        if not config.exists(['nat', direction]):
+            continue
+
+        for rule in config.list_nodes(['nat', direction, 'rule']):
+            base = ['nat', direction, 'rule', rule]
+
+            # Check if the log node exists and if log is enabled,
+            # migrate it to the new valueless 'log' node
+            if config.exists(base + ['log']):
+                tmp = config.return_value(base + ['log'])
+                config.delete(base + ['log'])
+                if tmp == 'enable':
+                    config.set(base + ['log'])
+
+    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)