T5474: establish common file name pattern for XML conf mode commands

We will use _ as CLI level divider. The XML definition filename and also
the Python helper should match the CLI node.

Example:
set interfaces ethernet -> interfaces_ethernet.xml.in
set interfaces bond -> interfaces_bond.xml.in
set service dhcp-server -> service_dhcp-server-xml.in

(cherry picked from commit 4ef110fd2c501b718344c72d495ad7e16d2bd465)

1 files changed, 111 insertions, 0 deletions

diff --git a/src/conf_mode/service_broadcast-relay.py b/src/conf_mode/service_broadcast-relay.py
new file mode 100755
index 000000000..31c552f5a
--- /dev/null
+++ b/src/conf_mode/service_broadcast-relay.py
@@ -0,0 +1,111 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2017-2023 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/>.
+
+import os
+
+from glob import glob
+from netifaces import AF_INET
+from sys import exit
+
+from vyos.config import Config
+from vyos.configverify import verify_interface_exists
+from vyos.template import render
+from vyos.utils.process import call
+from vyos.utils.network import is_afi_configured
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+config_file_base = r'/etc/default/udp-broadcast-relay'
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+    base = ['service', 'broadcast-relay']
+
+    relay = conf.get_config_dict(base, key_mangling=('-', '_'), get_first_key=True)
+    return relay
+
+def verify(relay):
+    if not relay or 'disabled' in relay:
+        return None
+
+    for instance, config in relay.get('id', {}).items():
+        # we don't have to check this instance when it's disabled
+        if 'disabled' in config:
+            continue
+
+        # we certainly require a UDP port to listen to
+        if 'port' not in config:
+            raise ConfigError(f'Port number is mandatory for UDP broadcast relay "{instance}"')
+
+        # Relaying data without two interface is kinda senseless ...
+        if len(config.get('interface', [])) < 2:
+            raise ConfigError('At least two interfaces are required for UDP broadcast relay "{instance}"')
+
+        for interface in config.get('interface', []):
+            verify_interface_exists(interface)
+            if not is_afi_configured(interface, AF_INET):
+                raise ConfigError(f'Interface "{interface}" has no IPv4 address configured!')
+
+    return None
+
+def generate(relay):
+    if not relay or 'disabled' in relay:
+        return None
+
+    for config in glob(config_file_base + '*'):
+        os.remove(config)
+
+    for instance, config in relay.get('id').items():
+        # we don't have to check this instance when it's disabled
+        if 'disabled' in config:
+            continue
+
+        config['instance'] = instance
+        render(config_file_base + instance, 'bcast-relay/udp-broadcast-relay.j2',
+               config)
+
+    return None
+
+def apply(relay):
+    # first stop all running services
+    call('systemctl stop udp-broadcast-relay@*.service')
+
+    if not relay or 'disable' in relay:
+        return None
+
+    # start only required service instances
+    for instance, config in relay.get('id').items():
+        # we don't have to check this instance when it's disabled
+        if 'disabled' in config:
+            continue
+
+        call(f'systemctl start udp-broadcast-relay@{instance}.service')
+
+    return None
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)