From 2053539a7d532941e2cdbcc37fff26a1b9c95447 Mon Sep 17 00:00:00 2001 From: Daniil Baturin Date: Tue, 4 Sep 2018 19:47:43 +0200 Subject: T823: extend the new DHCP op mode. --- src/op_mode/show_dhcp.py | 58 +++++++++++++++++++++++++++++++- src/op_mode/show_dhcpv6.py | 82 ++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 139 insertions(+), 1 deletion(-) create mode 100755 src/op_mode/show_dhcpv6.py (limited to 'src') diff --git a/src/op_mode/show_dhcp.py b/src/op_mode/show_dhcp.py index 2084a9509..e76fc3a14 100755 --- a/src/op_mode/show_dhcp.py +++ b/src/op_mode/show_dhcp.py @@ -15,7 +15,9 @@ # along with this program. If not, see . # +import json import argparse +import ipaddress import tabulate @@ -76,6 +78,24 @@ def show_leases(leases): print(output) +def get_pool_size(config, pool): + size = 0 + subnets = config.list_effective_nodes("service dhcp-server shared-network-name {0} subnet".format(pool)) + for s in subnets: + ranges = config.list_effective_nodes("service dhcp-server shared-network-name {0} subnet {1} range".format(pool, s)) + for r in ranges: + start = config.return_effective_value("service dhcp-server shared-network-name {0} subnet {1} range {2} start".format(pool, s, r)) + stop = config.return_effective_value("service dhcp-server shared-network-name {0} subnet {1} range {2} stop".format(pool, s, r)) + + size += int(ipaddress.IPv4Address(stop)) - int(ipaddress.IPv4Address(start)) + + return size + +def show_pool_stats(stats): + headers = ["Pool", "Size", "Leases", "Available", "Usage"] + output = tabulate.tabulate(stats, headers) + + print(output) if __name__ == '__main__': parser = argparse.ArgumentParser() @@ -86,6 +106,7 @@ if __name__ == '__main__': 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") + parser.add_argument("-j", "--json", action="store_true", default=False, help="Product JSON output") args = parser.parse_args() @@ -101,4 +122,39 @@ if __name__ == '__main__': else: leases = get_leases(lease_file, state='active') - show_leases(leases) + if args.json: + print(json.dumps(leases, indent=4)) + else: + show_leases(leases) + elif args.statistics: + config = vyos.config.Config() + + pools = [] + + # Get relevant pools + if args.pool: + pools = [args.pool] + else: + pools = config.list_effective_nodes("service dhcp-server shared-network-name") + + # Get pool usage stats + stats = [] + for p in pools: + size = get_pool_size(config, p) + leases = len(get_leases(lease_file, state='active', pool=args.pool)) + use_percentage = round(leases / size) * 100 + if args.json: + pool_stats = {"pool": p, "size": size, "leases": leases, + "available": (size - leases), "percentage": use_percentage} + else: + # For tabulate + pool_stats = [p, size, leases, size - leases, "{0}%".format(use_percentage)] + stats.append(pool_stats) + + # Print stats + if args.json: + print(json.dumps(stats, indent=4)) + else: + show_pool_stats(stats) + else: + print("Use either --leases or --statistics option") 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 . +# + +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") -- cgit v1.2.3