openvpn: T1548: add op-mode command for resetting client

vyos@vyos:~$ run reset openvpn client client1

1 files changed, 57 insertions, 0 deletions

diff --git a/src/completion/list_openvpn_clients.py b/src/completion/list_openvpn_clients.py
new file mode 100755
index 000000000..828ce6b5e
--- /dev/null
+++ b/src/completion/list_openvpn_clients.py
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2019 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
+import sys
+import argparse
+
+from vyos.interfaces import list_interfaces_of_type
+
+def get_client_from_interface(interface):
+    clients = []
+    with open('/opt/vyatta/etc/openvpn/status/' + interface + '.status', 'r') as f:
+        dump = False
+        for line in f:
+            if line.startswith("Common Name,"):
+                dump = True
+                continue
+            if line.startswith("ROUTING TABLE"):
+                dump = False
+                continue
+            if dump:
+                # client entry in this file looks like
+                # client1,172.18.202.10:47495,2957,2851,Sat Aug 17 00:07:11 2019
+                # we are only interested in the client name 'client1'
+                clients.append(line.split(',')[0])
+
+    return clients
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-i", "--interface", type=str, help="List connected clients per interface")
+    parser.add_argument("-a", "--all", action='store_true', help="List all connected OpenVPN clients")
+    args = parser.parse_args()
+
+    clients = []
+
+    if args.interface:
+        clients = get_client_from_interface(args.interface)
+    elif args.all:
+        for interface in list_interfaces_of_type("openvpn"):
+            clients += get_client_from_interface(interface)
+
+    print(" ".join(clients))
+