policy: T4414: add support for route-map "as-path prepend last-as x"

1 files changed, 62 insertions, 0 deletions

diff --git a/src/migration-scripts/quagga/9-to-10 b/src/migration-scripts/quagga/9-to-10
new file mode 100755
index 000000000..249738822
--- /dev/null
+++ b/src/migration-scripts/quagga/9-to-10
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2022 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/>.
+
+# re-organize route-map as-path
+
+from sys import argv
+from sys import exit
+
+from vyos.configtree import ConfigTree
+
+if (len(argv) < 2):
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+base = ['policy', 'route-map']
+
+config = ConfigTree(config_file)
+if not config.exists(base):
+    # Nothing to do
+    exit(0)
+
+for route_map in config.list_nodes(base):
+    # Bail out Early
+    if not config.exists(base + [route_map, 'rule']):
+        continue
+
+    for rule in config.list_nodes(base + [route_map, 'rule']):
+        rule_base = base + [route_map, 'rule', rule]
+        if config.exists(rule_base + ['set', 'as-path-exclude']):
+            tmp = config.return_value(rule_base + ['set', 'as-path-exclude'])
+            config.delete(rule_base + ['set', 'as-path-exclude'])
+            config.set(rule_base + ['set', 'as-path', 'exclude'], value=tmp)
+
+        if config.exists(rule_base + ['set', 'as-path-prepend']):
+            tmp = config.return_value(rule_base + ['set', 'as-path-prepend'])
+            config.delete(rule_base + ['set', 'as-path-prepend'])
+            config.set(rule_base + ['set', 'as-path', 'prepend'], value=tmp)
+
+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)