T5154: NTP: allow maximum of one ipv4 and one ipv6 address on parameter <listen-address>. Also allow only one single value <interface>.

2 files changed, 86 insertions, 10 deletions

diff --git a/src/conf_mode/ntp.py b/src/conf_mode/ntp.py
index 92cb73aab..95766c44c 100755
--- a/src/conf_mode/ntp.py
+++ b/src/conf_mode/ntp.py
@@ -24,6 +24,7 @@ from vyos.util import call
 from vyos.util import chmod_750
 from vyos.util import get_interface_config
 from vyos.template import render
+from vyos.template import is_ipv4
 from vyos import ConfigError
 from vyos import airbag
 airbag.enable()
@@ -62,16 +63,29 @@ def verify(ntp):
 
     if 'interface' in ntp:
         # If ntpd should listen on a given interface, ensure it exists
-        for interface in ntp['interface']:
-            verify_interface_exists(interface)
-
-            # If we run in a VRF, our interface must belong to this VRF, too
-            if 'vrf' in ntp:
-                tmp = get_interface_config(interface)
-                vrf_name = ntp['vrf']
-                if 'master' not in tmp or tmp['master'] != vrf_name:
-                    raise ConfigError(f'NTP runs in VRF "{vrf_name}" - "{interface}" '\
-                                      f'does not belong to this VRF!')
+        interface = ntp['interface']
+        verify_interface_exists(interface)
+
+        # If we run in a VRF, our interface must belong to this VRF, too
+        if 'vrf' in ntp:
+            tmp = get_interface_config(interface)
+            vrf_name = ntp['vrf']
+            if 'master' not in tmp or tmp['master'] != vrf_name:
+                raise ConfigError(f'NTP runs in VRF "{vrf_name}" - "{interface}" '\
+                                  f'does not belong to this VRF!')
+
+    if 'listen_address' in ntp:
+        ipv4_addresses = 0
+        ipv6_addresses = 0
+        for address in ntp['listen_address']:
+            if is_ipv4(address):
+                ipv4_addresses += 1
+            else:
+                ipv6_addresses += 1
+        if ipv4_addresses > 1:
+            raise ConfigError(f'NTP Only admits one ipv4 value for listen-address parameter ')
+        if ipv6_addresses > 1:
+            raise ConfigError(f'NTP Only admits one ipv6 value for listen-address parameter ')
 
     return None
 
diff --git a/src/migration-scripts/ntp/2-to-3 b/src/migration-scripts/ntp/2-to-3
new file mode 100755
index 000000000..7d4e0bd83
--- /dev/null
+++ b/src/migration-scripts/ntp/2-to-3
@@ -0,0 +1,62 @@
+#!/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/>.
+
+# T5154: allow only one ip address per family for parameter 'listen-address'
+# Allow only one interface for parameter 'interface'
+# If more than one are specified, remove such entries
+
+import sys
+
+from vyos.configtree import ConfigTree
+from vyos.template import is_ipv4
+from vyos.template import is_ipv6
+
+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)
+
+base_path = ['service', 'ntp']
+if not config.exists(base_path):
+    # Nothing to do
+    sys.exit(0)
+
+if config.exists(base_path + ['listen-address']) and (len([addr for addr in config.return_values(base_path + ['listen-address']) if is_ipv4(addr)]) > 1):
+    for addr in config.return_values(base_path + ['listen-address']):
+        if is_ipv4(addr):
+            config.delete_value(base_path + ['listen-address'], addr)
+
+if config.exists(base_path + ['listen-address']) and (len([addr for addr in config.return_values(base_path + ['listen-address']) if is_ipv6(addr)]) > 1):
+    for addr in config.return_values(base_path + ['listen-address']):
+        if is_ipv6(addr):
+            config.delete_value(base_path + ['listen-address'], addr)
+
+if config.exists(base_path + ['interface']):
+    if len(config.return_values(base_path + ['interface'])) > 1:
+        config.delete(base_path + ['interface'])
+
+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)