1 files changed, 57 insertions, 0 deletions
diff --git a/src/migration-scripts/system/20-to-21 b/src/migration-scripts/system/20-to-21
new file mode 100755
index 000000000..ad41be646
--- /dev/null
+++ b/src/migration-scripts/system/20-to-21
@@ -0,0 +1,57 @@
+#!/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 os
+
+from sys import exit, argv
+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()
+
+base = ['system', 'sysctl']
+config = ConfigTree(config_file)
+
+if not config.exists(base):
+    # Nothing to do
+    exit(0)
+
+for all_custom in ['all', 'custom']:
+    if config.exists(base + [all_custom]):
+        for key in config.list_nodes(base + [all_custom]):
+            tmp = config.return_value(base + [all_custom, key, 'value'])
+            config.set(base + ['parameter', key, 'value'], value=tmp)
+            config.set_tag(base + ['parameter'])
+        config.delete(base + [all_custom])
+
+for ipv4_param in ['net.ipv4.igmp_max_memberships', 'net.ipv4.ipfrag_time']:
+    if config.exists(base + [ipv4_param]):
+        tmp = config.return_value(base + [ipv4_param])
+        config.set(base + ['parameter', ipv4_param, 'value'], value=tmp)
+        config.set_tag(base + ['parameter'])
+        config.delete(base + [ipv4_param])
+
+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)