From 7d31eae269650ae3767ab1736d14e9f3d6867a67 Mon Sep 17 00:00:00 2001
From: Christian Poessinger <christian@poessinger.com>
Date: Tue, 24 Mar 2020 18:25:21 +0100
Subject: router-advert: T1831: add config migration script
---
src/migration-scripts/interfaces/5-to-6 | 111 ++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
create mode 100755 src/migration-scripts/interfaces/5-to-6
diff --git a/src/migration-scripts/interfaces/5-to-6 b/src/migration-scripts/interfaces/5-to-6
new file mode 100755
index 000000000..9dbfd30e1
--- /dev/null
+++ b/src/migration-scripts/interfaces/5-to-6
@@ -0,0 +1,111 @@
+#!/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/>.
+
+# Migrate IPv6 router advertisments from a nested interface configuration to
+# a denested "service router-advert"
+
+import sys
+from vyos.configtree import ConfigTree
+
+def copy_rtradv(c, old_base, interface):
+ base = ['service', 'router-advert', 'interface']
+
+ if c.exists(old_base):
+ if not c.exists(base):
+ c.set(base)
+ c.set_tag(base)
+
+ # take the old node as a whole and copy it to new new path,
+ # additional migrations will be done afterwards
+ new_base = base + [interface]
+ c.copy(old_base, new_base)
+ c.delete(old_base)
+
+ # cur-hop-limit has been renamed to hop-limit
+ if c.exists(new_base + ['cur-hop-limit']):
+ c.rename(new_base + ['cur-hop-limit'], 'hop-limit')
+
+ bool_cleanup = ['managed-flag', 'other-config-flag']
+ for bool in bool_cleanup:
+ if c.exists(new_base + [bool]):
+ tmp = c.return_value(new_base + [bool])
+ c.delete(new_base + [bool])
+ if tmp == 'true':
+ c.set(new_base + [bool])
+
+ # max/min interval moved to subnode
+ intervals = ['max-interval', 'min-interval']
+ for interval in intervals:
+ if c.exists(new_base + [interval]):
+ tmp = c.return_value(new_base + [interval])
+ c.delete(new_base + [interval])
+ min_max = interval.split('-')[0]
+ c.set(new_base + ['interval', min_max], value=tmp)
+
+ # cleanup boolean nodes in individual prefix
+ prefix_base = new_base + ['prefix']
+ if c.exists(prefix_base):
+ for prefix in config.list_nodes(prefix_base):
+ bool_cleanup = ['autonomous-flag', 'on-link-flag']
+ for bool in bool_cleanup:
+ if c.exists(prefix_base + [prefix, bool]):
+ tmp = c.return_value(prefix_base + [prefix, bool])
+ c.delete(prefix_base + [prefix, bool])
+ if tmp == 'true':
+ c.set(prefix_base + [prefix, bool])
+
+ # router advertisement can be individually disabled per interface
+ # the node has been renamed from send-advert {true | false} to no-send-advert
+ if c.exists(new_base + ['send-advert']):
+ tmp = c.return_value(new_base + ['send-advert'])
+ c.delete(new_base + ['send-advert'])
+ if tmp == 'false':
+ c.set(new_base + ['no-send-advert'])
+
+if __name__ == '__main__':
+ if (len(sys.argv) < 1):
+ print("Must specify file name!")
+ exit(1)
+
+ file_name = sys.argv[1]
+ with open(file_name, 'r') as f:
+ config_file = f.read()
+
+ config = ConfigTree(config_file)
+
+ # list all individual interface types like dummy, ethernet and so on
+ for if_type in config.list_nodes(['interfaces']):
+ base_if_type = ['interfaces', if_type]
+
+ # for every individual interface we need to check if there is an
+ # ipv6 ra configured ... and also for every VIF (VLAN) interface
+ for intf in config.list_nodes(base_if_type):
+ old_base = base_if_type + [intf, 'ipv6', 'router-advert']
+ copy_rtradv(config, old_base, intf)
+
+ vif_base = base_if_type + [intf, 'vif']
+ if config.exists(vif_base):
+ for vif in config.list_nodes(vif_base):
+ old_base = vif_base + [vif, 'ipv6', 'router-advert']
+ vlan_name = f'{intf}.{vif}'
+ copy_rtradv(config, old_base, vlan_name)
+
+ 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))
+ sys.exit(1)
--
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