From d95200e96763e4a7ed02577b1b177c84abb77838 Mon Sep 17 00:00:00 2001 From: sarthurdev <965089+sarthurdev@users.noreply.github.com> Date: Fri, 16 Dec 2022 11:41:33 +0100 Subject: dhcp: T3316: Migrate dhcp/dhcpv6 server to Kea --- src/migration-scripts/dhcpv6-server/1-to-2 | 86 ++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100755 src/migration-scripts/dhcpv6-server/1-to-2 (limited to 'src/migration-scripts/dhcpv6-server') 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 . + +# 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) -- cgit v1.2.3