diff options
| -rwxr-xr-x | src/op_mode/show_dhcp.py | 104 |
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) |