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-rwxr-xr-xsrc/op_mode/show_dhcp.py104
1 files changed, 104 insertions, 0 deletions
diff --git a/src/op_mode/show_dhcp.py b/src/op_mode/show_dhcp.py
new file mode 100755
index 000000000..2084a9509
--- /dev/null
+++ b/src/op_mode/show_dhcp.py
@@ -0,0 +1,104 @@
+#!/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 argparse
+
+import tabulate
+
+import vyos.config
+
+from isc_dhcp_leases import Lease, IscDhcpLeases
+
+
+lease_file = "/config/dhcpd.leases"
+pool_key = "shared-networkname"
+
+def in_pool(lease, pool):
+ if pool_key in lease.sets:
+ if lease.sets[pool_key] == pool:
+ return True
+
+ return False
+
+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["hardware_address"] = lease.ethernet
+ data["hostname"] = lease.hostname
+ data["ip"] = lease.ip
+
+ try:
+ data["pool"] = lease.sets[pool_key]
+ except:
+ data["pool"] = ""
+
+ return data
+
+def get_leases(leases, state=None, pool=None):
+ leases = IscDhcpLeases(lease_file).get()
+
+ if state is not None:
+ leases = list(filter(lambda x: x.binding_state == 'active', leases))
+
+ if pool is not None:
+ leases = list(filter(lambda x: in_pool(x, pool), leases))
+
+ return list(map(get_lease_data, leases))
+
+def show_leases(leases):
+ headers = ["IP address", "Hardware address", "Lease expiration", "Pool", "Client Name"]
+
+ lease_list = []
+ for l in leases:
+ lease_list.append([l["ip"], l["hardware_address"], l["expires"], l["pool"], l["hostname"]])
+
+ 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("-e", "--expired", action="store_true", help="Show expired leases")
+ parser.add_argument("-p", "--pool", type=str, action="store", help="Show lease for specific pool")
+
+ args = parser.parse_args()
+
+ if args.leases:
+ if args.expired:
+ if args.pool:
+ leases = get_leases(lease_file, state='free', pool=args.pool)
+ else:
+ leases = get_leases(lease_file, state='free')
+ else:
+ if args.pool:
+ leases = get_leases(lease_file, state='active', pool=args.pool)
+ else:
+ leases = get_leases(lease_file, state='active')
+
+ show_leases(leases)