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authorChristian Poessinger <christian@poessinger.com>2018-05-06 20:59:37 +0200
committerChristian Poessinger <christian@poessinger.com>2018-05-06 23:07:46 +0200
commit3a1586d0490b3babfa331650f9758c2928234138 (patch)
tree8faacec6339b023cdc5c5c8b03f24536a3dffee6 /src
parentb50430e30aa4c5c387e7aaaaa893dfe1410c9be3 (diff)
downloadvyos-1x-3a1586d0490b3babfa331650f9758c2928234138.tar.gz
vyos-1x-3a1586d0490b3babfa331650f9758c2928234138.zip
T623: Rewrite NTP subsystem in new XML style interface definition
Diffstat (limited to 'src')
-rwxr-xr-xsrc/conf-mode/vyos-config-ntp.py130
1 files changed, 130 insertions, 0 deletions
diff --git a/src/conf-mode/vyos-config-ntp.py b/src/conf-mode/vyos-config-ntp.py
new file mode 100755
index 000000000..8d2ca99ba
--- /dev/null
+++ b/src/conf-mode/vyos-config-ntp.py
@@ -0,0 +1,130 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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/>.
+#
+#
+
+import sys
+import os
+import time
+import socket
+import ipaddress
+
+from vyos.config import Config
+from vyos.util import ConfigError
+
+config_file = r'/etc/ntp.conf'
+
+def get_config():
+ ntp = {}
+ conf = Config()
+ conf.set_level('system ntp')
+ if not conf.exists(''):
+ return ntp
+
+ if conf.exists('allow-clients address'):
+ ntp.setdefault('allow-networks', [])
+ networks = []
+ networks = conf.return_values('allow-clients address')
+ for network in networks:
+ ntp['allow-networks'].append(network)
+
+ if conf.exists('server'):
+ ntp.setdefault('servers', [])
+ for node in conf.list_nodes('server'):
+ server = {
+ "name": node,
+ "dynamic": False,
+ "noselect": False,
+ "preempt": False,
+ "prefer": False,
+ }
+ if conf.exists('server {0} dynamic'.format(node)):
+ server['dynamic'] = True
+ if conf.exists('server {0} noselect'.format(node)):
+ server['noselect'] = True
+ if conf.exists('server {0} preempt'.format(node)):
+ server['preempt'] = True
+ if conf.exists('server {0} prefer'.format(node)):
+ server['prefer'] = True
+
+ ntp['servers'].append(server)
+
+ return ntp
+
+def verify(ntp):
+ if 'allow-networks' in ntp.keys():
+ for network in ntp['allow-networks']:
+ try:
+ addr = ipaddress.ip_network(network)
+ except ValueError:
+ raise ConfigError("{0} does not appear to be a valid IPv4 or IPv6 network, check host bits.".format(network))
+
+ return None
+
+def generate(ntp):
+ config_header = '### Autogenerated by vyos-config-ntp.py on {tm} ###\n'.format(tm=time.strftime("%a, %d %b %Y %H:%M:%S", time.localtime()))
+
+ # write new configuration file
+ f = open(config_file, 'w')
+ f.write(config_header)
+ f.write('driftfile /var/lib/ntp/ntp.drift\n')
+ f.write('# By default, only allow ntpd to query time sources, ignore any\n')
+ f.write('# incoming requests.\n')
+ f.write('restrict default ignore\n')
+ f.write('\n')
+ f.write('# Local users have unrestricted access, allowing reconfiguration\n')
+ f.write('# via ntpdc\n')
+ f.write('restrict 127.0.0.1\n')
+ f.write('restrict -6 ::1\n')
+ f.write('\n')
+
+ if 'servers' in ntp.keys():
+ for server in ntp['servers']:
+ addr = socket.gethostbyname(server['name'])
+ opt = ['dynamic', 'noselect', 'preempt', 'prefer']
+ f.write('# Server configuration {0}\n'.format(server['name']))
+ f.write('server {0} iburst {1}\n'.format(addr, '{0}'.format(' '.join(str(o) for o in opt if server[o]))))
+ f.write('restrict {0} nomodify notrap nopeer noquery\n'.format(addr))
+ f.write('\n')
+
+ if 'allow-networks' in ntp.keys():
+ for network in ntp['allow-networks']:
+ addr = ipaddress.ip_network(network)
+ f.write('# Client configuration: {0}\n'.format(network))
+ f.write('restrict {0} mask {1} nomodify notrap nopeer\n'.format(addr.network_address, addr.netmask))
+ f.write('\n')
+
+ f.close()
+ return None
+
+def apply(ntp):
+ if len(ntp) == 0:
+ cmd = "sudo /usr/sbin/invoke-rc.d ntp stop"
+ else:
+ cmd = "sudo /usr/sbin/invoke-rc.d ntp force-reload"
+
+ os.system(cmd)
+ return None
+
+if __name__ == '__main__':
+ try:
+ c = get_config()
+ verify(c)
+ generate(c)
+ apply(c)
+ except ConfigError as e:
+ print(e)
+ sys.exit(1)