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#!/usr/bin/env python3
# Removes boolean operator from:
# - "set service dhcp-server shared-network-name <xyz> subnet 172.31.0.0/24 ip-forwarding enable (true|false)"
# - "set service dhcp-server shared-network-name <xyz> authoritative (true|false)"
# - "set service dhcp-server disabled (true|false)"
import sys
from vyos.configtree import ConfigTree
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()
config = ConfigTree(config_file)
if not config.exists(['service', 'dhcp-server']):
# Nothing to do
sys.exit(0)
else:
base = ['service', 'dhcp-server']
# Make node "set service dhcp-server dynamic-dns-update enable (true|false)" valueless
if config.exists(base + ['dynamic-dns-update']):
bool_val = config.return_value(base + ['dynamic-dns-update', 'enable'])
# Delete the node with the old syntax
config.delete(base + ['dynamic-dns-update'])
if str(bool_val) == 'true':
# Enable dynamic-dns-update with new syntax
config.set(base + ['dynamic-dns-update'], value=None)
# Make node "set service dhcp-server disabled (true|false)" valueless
if config.exists(base + ['disabled']):
bool_val = config.return_value(base + ['disabled'])
# Delete the node with the old syntax
config.delete(base + ['disabled'])
if str(bool_val) == 'true':
# Now disable DHCP server with the new syntax
config.set(base + ['disable'], value=None)
# Make node "set service dhcp-server hostfile-update (enable|disable) valueless
if config.exists(base + ['hostfile-update']):
bool_val = config.return_value(base + ['hostfile-update'])
# Delete the node with the old syntax incl. all subnodes
config.delete(base + ['hostfile-update'])
if str(bool_val) == 'enable':
# Enable hostfile update with new syntax
config.set(base + ['hostfile-update'], value=None)
# Run this for every instance if 'shared-network-name'
for network in config.list_nodes(base + ['shared-network-name']):
base_network = base + ['shared-network-name', network]
# format as tag node to avoid loading problems
config.set_tag(base + ['shared-network-name'])
# Run this for every specified 'subnet'
for subnet in config.list_nodes(base_network + ['subnet']):
base_subnet = base_network + ['subnet', subnet]
# format as tag node to avoid loading problems
config.set_tag(base_network + ['subnet'])
# Make node "set service dhcp-server shared-network-name <xyz> subnet 172.31.0.0/24 ip-forwarding enable" valueless
if config.exists(base_subnet + ['ip-forwarding', 'enable']):
bool_val = config.return_value(base_subnet + ['ip-forwarding', 'enable'])
# Delete the node with the old syntax
config.delete(base_subnet + ['ip-forwarding'])
if str(bool_val) == 'true':
# Recreate node with new syntax
config.set(base_subnet + ['ip-forwarding'], value=None)
# Rename node "set service dhcp-server shared-network-name <xyz> subnet 172.31.0.0/24 start <172.16.0.4> stop <172.16.0.9>
if config.exists(base_subnet + ['start']):
# This is the new "range" id for DHCP lease ranges
r_id = 0
for range in config.list_nodes(base_subnet + ['start']):
range_start = range
range_stop = config.return_value(base_subnet + ['start', range_start, 'stop'])
# Delete the node with the old syntax
config.delete(base_subnet + ['start', range_start])
# Create the node for the new syntax
# Note: range is a tag node, counter is its child, not a value
config.set(base_subnet + ['range', r_id])
config.set(base_subnet + ['range', r_id, 'start'], value=range_start)
config.set(base_subnet + ['range', r_id, 'stop'], value=range_stop)
# format as tag node to avoid loading problems
config.set_tag(base_subnet + ['range'])
# increment range id for possible next range definition
r_id += 1
# Delete the node with the old syntax
config.delete(['service', 'dhcp-server', 'shared-network-name', network, 'subnet', subnet, 'start'])
# Make node "set service dhcp-server shared-network-name <xyz> authoritative" valueless
if config.exists(['service', 'dhcp-server', 'shared-network-name', network, 'authoritative']):
authoritative = config.return_value(['service', 'dhcp-server', 'shared-network-name', network, 'authoritative'])
# Delete the node with the old syntax
config.delete(['service', 'dhcp-server', 'shared-network-name', network, 'authoritative'])
# Recreate node with new syntax - if required
if authoritative == "enable":
config.set(['service', 'dhcp-server', 'shared-network-name', network, 'authoritative'])
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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