dhcpv6-server: T2406: merge sip-server-{address,name} to sip-server node

The subnet specific nodes sip-server-address & sip-server-name do the same for
the user - specify a SIP server. Only the backend is rendered in a different
way, as ISC DHCPv6 expects different options. There is absolutely no need for
the user to distinguish between both two nodes.

1 files changed, 61 insertions, 0 deletions

diff --git a/src/migration-scripts/dhcpv6-server/0-to-1 b/src/migration-scripts/dhcpv6-server/0-to-1
new file mode 100755
index 000000000..6f1150da1
--- /dev/null
+++ b/src/migration-scripts/dhcpv6-server/0-to-1
@@ -0,0 +1,61 @@
+#!/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/>.
+
+# combine both sip-server-address and sip-server-name nodes to common sip-server
+
+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)
+base = ['service', 'dhcpv6-server', 'shared-network-name']
+if not config.exists(base):
+    # Nothing to do
+    exit(0)
+else:
+    # we need to run this for every configured network
+    for network in config.list_nodes(base):
+        for subnet in config.list_nodes(base + [network, 'subnet']):
+            sip_server = []
+
+            # Do we have 'sip-server-address' configured?
+            if config.exists(base + [network, 'subnet', subnet, 'sip-server-address']):
+                sip_server += config.return_values(base + [network, 'subnet', subnet, 'sip-server-address'])
+                config.delete(base + [network, 'subnet', subnet, 'sip-server-address'])
+
+            # Do we have 'sip-server-name' configured?
+            if config.exists(base + [network, 'subnet', subnet, 'sip-server-name']):
+                sip_server += config.return_values(base + [network, 'subnet', subnet, 'sip-server-name'])
+                config.delete(base + [network, 'subnet', subnet, 'sip-server-name'])
+
+            # Write new CLI value for sip-server
+            for server in sip_server:
+                config.set(base + [network, 'subnet', subnet, 'sip-server'], value=server, replace=False)
+
+    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)