T823: extend the new DHCP op mode.

1 files changed, 82 insertions, 0 deletions

diff --git a/src/op_mode/show_dhcpv6.py b/src/op_mode/show_dhcpv6.py
new file mode 100755
index 000000000..8879a45c5
--- /dev/null
+++ b/src/op_mode/show_dhcpv6.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2018 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 argparse
+import ipaddress
+
+import tabulate
+
+import vyos.config
+
+from isc_dhcp_leases import Lease, IscDhcpLeases
+
+
+lease_file = "/config/dhcpdv6.leases"
+
+def get_lease_data(lease):
+    data = {}
+
+    # End time may not be present in backup leases
+    try:
+        data["expires"] = lease.end.strftime("%Y/%m/%d %H:%M:%S")
+    except:
+        data["expires"] = ""
+
+    data["duid"] = lease.host_identifier_string
+    data["ip"] = lease.ip
+
+    return data
+
+def get_leases(leases, state=None):
+    leases = IscDhcpLeases(lease_file).get()
+
+    if state is not None:
+        leases = list(filter(lambda x: x.binding_state == 'active', leases))
+
+    return list(map(get_lease_data, leases))
+
+def show_leases(leases):
+    headers = ["IPv6 address", "Lease expiration", "DUID"]
+
+    lease_list = []
+    for l in leases:
+        lease_list.append([l["ip"], l["expires"], l["duid"]])
+
+    output = tabulate.tabulate(lease_list, headers)
+
+    print(output)
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser()
+
+    group = parser.add_mutually_exclusive_group()
+    group.add_argument("-l", "--leases", action="store_true", help="Show DHCP leases")
+    group.add_argument("-s", "--statistics", action="store_true", help="Show DHCP statistics")
+
+    parser.add_argument("-p", "--pool", type=str, action="store", help="Show lease for specific pool")
+    parser.add_argument("-j", "--json", action="store_true", default=False, help="Product JSON output")
+
+    args = parser.parse_args()
+
+    if args.leases:
+        leases = get_leases(lease_file, state='active')
+        show_leases(leases)
+    elif args.statistics:
+        print("DHCPv6 statistics option is not available")
+    else:
+        print("Invalid option")