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authorsarthurdev <965089+sarthurdev@users.noreply.github.com>2022-12-16 11:41:33 +0100
committersarthurdev <965089+sarthurdev@users.noreply.github.com>2023-12-08 00:29:38 +0100
commitd95200e96763e4a7ed02577b1b177c84abb77838 (patch)
treeee6389af45a012f4a48bdaae5375873444061e96 /src/migration-scripts/dhcpv6-server/1-to-2
parentee5c78e966d3b6e98e7b4f94acb4ef88094b5e54 (diff)
downloadvyos-1x-d95200e96763e4a7ed02577b1b177c84abb77838.tar.gz
vyos-1x-d95200e96763e4a7ed02577b1b177c84abb77838.zip
dhcp: T3316: Migrate dhcp/dhcpv6 server to Kea
Diffstat (limited to 'src/migration-scripts/dhcpv6-server/1-to-2')
-rwxr-xr-xsrc/migration-scripts/dhcpv6-server/1-to-286
1 files changed, 86 insertions, 0 deletions
diff --git a/src/migration-scripts/dhcpv6-server/1-to-2 b/src/migration-scripts/dhcpv6-server/1-to-2
new file mode 100755
index 000000000..cc5a8900a
--- /dev/null
+++ b/src/migration-scripts/dhcpv6-server/1-to-2
@@ -0,0 +1,86 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2023 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/>.
+
+# T3316: Migrate to Kea
+# - Kea was meant to have support for key "prefix-highest" under PD which would allow an address range
+# However this seems to have never been implemented. A conversion to prefix length is needed (where possible).
+# Ref: https://lists.isc.org/pipermail/kea-users/2022-November/003686.html
+# - Remove prefix temporary value, convert to multi leafNode (https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp6-srv.html#dhcpv6-server-limitations)
+
+import sys
+from vyos.configtree import ConfigTree
+from vyos.utils.network import ipv6_prefix_length
+
+if (len(sys.argv) < 1):
+ print("Must specify file name!")
+ sys.exit(1)
+
+file_name = sys.argv[1]
+
+with open(file_name, 'r') as f:
+ config_file = f.read()
+
+base = ['service', 'dhcpv6-server', 'shared-network-name']
+config = ConfigTree(config_file)
+
+if not config.exists(base):
+ # Nothing to do
+ exit(0)
+
+for network in config.list_nodes(base):
+ if not config.exists(base + [network, 'subnet']):
+ continue
+
+ for subnet in config.list_nodes(base + [network, 'subnet']):
+ # Delete temporary value under address-range prefix, convert tagNode to leafNode multi
+ if config.exists(base + [network, 'subnet', subnet, 'address-range', 'prefix']):
+ prefix_base = base + [network, 'subnet', subnet, 'address-range', 'prefix']
+ prefixes = config.list_nodes(prefix_base)
+
+ config.delete(prefix_base)
+
+ for prefix in prefixes:
+ config.set(prefix_base, value=prefix, replace=False)
+
+ if config.exists(base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']):
+ prefix_base = base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']
+
+ config.set(prefix_base)
+ config.set_tag(prefix_base)
+
+ for start in config.list_nodes(base + [network, 'subnet', subnet, 'prefix-delegation', 'start']):
+ path = base + [network, 'subnet', subnet, 'prefix-delegation', 'start', start]
+
+ delegated_length = config.return_value(path + ['prefix-length'])
+ stop = config.return_value(path + ['stop'])
+
+ prefix_length = ipv6_prefix_length(start, stop)
+
+ # This range could not be converted into a simple prefix length and must be skipped
+ if not prefix_length:
+ continue
+
+ config.set(prefix_base + [start, 'delegated-length'], value=delegated_length)
+ config.set(prefix_base + [start, 'prefix-length'], value=prefix_length)
+
+ config.delete(base + [network, 'subnet', subnet, 'prefix-delegation', 'start'])
+
+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)