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, 74 insertions, 0 deletions

diff --git a/src/conf_mode/protocols_static_arp.py b/src/conf_mode/protocols_static_arp.py
new file mode 100755
index 000000000..b141f1141
--- /dev/null
+++ b/src/conf_mode/protocols_static_arp.py
@@ -0,0 +1,74 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018-2022 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/>.
+
+from sys import exit
+
+from vyos.config import Config
+from vyos.configdict import node_changed
+from vyos.utils.process import call
+from vyos import ConfigError
+from vyos import airbag
+airbag.enable()
+
+def get_config(config=None):
+    if config:
+        conf = config
+    else:
+        conf = Config()
+
+    base = ['protocols', 'static', 'arp']
+    arp = conf.get_config_dict(base, get_first_key=True)
+
+    if 'interface' in arp:
+        for interface in arp['interface']:
+            tmp = node_changed(conf, base + ['interface', interface, 'address'], recursive=True)
+            if tmp: arp['interface'][interface].update({'address_old' : tmp})
+
+    return arp
+
+def verify(arp):
+    pass
+
+def generate(arp):
+    pass
+
+def apply(arp):
+    if not arp:
+        return None
+
+    if 'interface' in arp:
+        for interface, interface_config in arp['interface'].items():
+            # Delete old static ARP assignments first
+            if 'address_old' in interface_config:
+                for address in interface_config['address_old']:
+                    call(f'ip neigh del {address} dev {interface}')
+
+            # Add new static ARP entries to interface
+            if 'address' not in interface_config:
+                continue
+            for address, address_config in interface_config['address'].items():
+                mac = address_config['mac']
+                call(f'ip neigh replace {address} lladdr {mac} dev {interface}')
+
+if __name__ == '__main__':
+    try:
+        c = get_config()
+        verify(c)
+        generate(c)
+        apply(c)
+    except ConfigError as e:
+        print(e)
+        exit(1)