ipsec: T3588: remove CLI options deprecated by strongSwan

- set vpn ipsec nat-traversal
- set vpn ipsec nat-networks allowed-network

1 files changed, 52 insertions, 0 deletions

diff --git a/src/migration-scripts/ipsec/5-to-6 b/src/migration-scripts/ipsec/5-to-6
new file mode 100755
index 000000000..29d73536f
--- /dev/null
+++ b/src/migration-scripts/ipsec/5-to-6
@@ -0,0 +1,52 @@
+#!/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/>.
+
+# Remove deprecated strongSwan options from VyOS CLI
+# - vpn ipsec nat-traversal enable
+# - vpn ipsec nat-networks allowed-network
+
+from sys import argv
+from sys import 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()
+
+base = ['vpn', 'ipsec']
+config = ConfigTree(config_file)
+
+if not config.exists(base):
+    # Nothing to do
+    exit(0)
+
+# Delete CLI nodes whose config options got removed by strongSwan
+for cli_node in ['nat-traversal', 'nat-networks']:
+    if config.exists(base + [cli_node]):
+        config.delete(base + [cli_node])
+
+try:
+    with open(file_name, 'w') as f:
+        f.write(config.to_string())
+except OSError as e:
+    print(f'Failed to save the modified config: {e}')
+    exit(1)