vrf: T4562: Rewrite show vrf to vyos.opmode format

1 files changed, 80 insertions, 0 deletions

diff --git a/src/op_mode/vrf.py b/src/op_mode/vrf.py
new file mode 100755
index 000000000..63d9b5ee5
--- /dev/null
+++ b/src/op_mode/vrf.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 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/>.
+
+import json
+import sys
+
+from tabulate import tabulate
+from vyos.util import cmd
+
+import vyos.opmode
+
+
+def _get_raw_data():
+    """
+    :return: list
+    """
+    output = cmd('sudo ip --json --brief link show type vrf')
+    data = json.loads(output)
+    return data
+
+
+def _get_vrf_members(vrf: str) -> list:
+    """
+    Get list of interface VRF members
+    :param vrf: str
+    :return: list
+    """
+    output = cmd(f'sudo ip --json --brief link show master {vrf}')
+    answer = json.loads(output)
+    interfaces = []
+    for data in answer:
+        if 'ifname' in data:
+            interfaces.append(data.get('ifname'))
+    return interfaces if len(interfaces) > 0 else ['n/a']
+
+
+def _get_formatted_output(raw_data):
+    data_entries = []
+    for vrf in raw_data:
+        name = vrf.get('ifname')
+        state = vrf.get('operstate').lower()
+        hw_address = vrf.get('address')
+        flags = ','.join(vrf.get('flags')).lower()
+        members = ','.join(_get_vrf_members(name))
+        data_entries.append([name, state, hw_address, flags, members])
+
+    headers = ["Name", "State", "MAC address", "Flags", "Interfaces"]
+    output = tabulate(data_entries, headers, numalign="left")
+    return output
+
+
+def show(raw: bool):
+    vrf_data = _get_raw_data()
+    if raw:
+        return vrf_data
+    else:
+        return _get_formatted_output(vrf_data)
+
+
+if __name__ == "__main__":
+    try:
+        res = vyos.opmode.run(sys.modules[__name__])
+        if res:
+            print(res)
+    except ValueError as e:
+        print(e)
+        sys.exit(1)