154 lines
6.1 KiB
Python
154 lines
6.1 KiB
Python
#!/usr/bin/python3
|
|
#
|
|
# Copyright (C) 2018 Canonical, Ltd.
|
|
# Author: Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; version 3.
|
|
#
|
|
# 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/>.
|
|
|
|
'''netplan ip command line'''
|
|
|
|
import logging
|
|
import os
|
|
import sys
|
|
import subprocess
|
|
from subprocess import CalledProcessError
|
|
|
|
from .. import utils
|
|
|
|
lease_path = {
|
|
'networkd': {
|
|
'pattern': 'run/systemd/netif/leases/{lease_id}',
|
|
'method': 'ifindex',
|
|
},
|
|
'NetworkManager': {
|
|
'pattern': 'var/lib/NetworkManager/internal-{lease_id}-{interface}.lease',
|
|
'method': 'nm_connection',
|
|
},
|
|
}
|
|
|
|
|
|
class NetplanIp(utils.NetplanCommand):
|
|
|
|
def __init__(self):
|
|
super().__init__(command_id='ip',
|
|
description='Retrieve IP information from the system',
|
|
leaf=False)
|
|
|
|
def run(self):
|
|
self.command_leases = NetplanIpLeases()
|
|
|
|
# subcommand: leases
|
|
p_ip_leases = self.subparsers.add_parser('leases',
|
|
help='Display IP leases',
|
|
add_help=False)
|
|
p_ip_leases.set_defaults(func=self.command_leases.run, commandclass=self.command_leases)
|
|
|
|
self.parse_args()
|
|
self.run_command()
|
|
|
|
|
|
class NetplanIpLeases(utils.NetplanCommand):
|
|
|
|
def __init__(self):
|
|
super().__init__(command_id='ip leases',
|
|
description='Display IP leases',
|
|
leaf=True)
|
|
|
|
def run(self):
|
|
self.parser.add_argument('interface',
|
|
help='Interface for which to display IP lease settings.')
|
|
self.parser.add_argument('--root-dir',
|
|
help='Search for configuration files in this root directory instead of /')
|
|
|
|
self.func = self.command_ip_leases
|
|
|
|
self.parse_args()
|
|
self.run_command()
|
|
|
|
def command_ip_leases(self):
|
|
|
|
if self.interface == 'help': # pragma: nocover (covered in autopkgtest)
|
|
self.print_usage()
|
|
|
|
def find_lease_file(mapping):
|
|
def lease_method_ifindex():
|
|
ifindex_f = os.path.join('/sys/class/net', self.interface, 'ifindex')
|
|
try:
|
|
with open(ifindex_f) as f:
|
|
return f.readlines()[0].strip()
|
|
except Exception as e:
|
|
logging.debug('Cannot read file %s: %s', ifindex_f, str(e))
|
|
raise
|
|
|
|
def lease_method_nm_connection():
|
|
# FIXME: handle older versions of NM where 'nmcli dev show' doesn't exist
|
|
try:
|
|
nmcli_dev_out = utils.nmcli_out(['dev', 'show', self.interface])
|
|
for line in nmcli_dev_out.splitlines():
|
|
if 'GENERAL.CONNECTION' in line:
|
|
conn_id = line.split(':')[1].rstrip().strip()
|
|
nmcli_con_out = utils.nmcli_out(['con', 'show', 'id', conn_id])
|
|
for line in nmcli_con_out.splitlines():
|
|
if 'connection.uuid' in line:
|
|
return line.split(':')[1].rstrip().strip()
|
|
except Exception as e:
|
|
raise Exception('Could not find a NetworkManager connection for the interface: %s' % str(e))
|
|
raise Exception('Could not find a NetworkManager connection for the interface')
|
|
|
|
lease_pattern = lease_path[mapping['backend']]['pattern']
|
|
lease_method = lease_path[mapping['backend']]['method']
|
|
|
|
try:
|
|
lease_id = eval("lease_method_" + lease_method)()
|
|
|
|
# We found something to build the path to the lease file with,
|
|
# at this point we may have something to look at; but if not,
|
|
# we'll rely on open() throwing an error.
|
|
# This might happen if networkd doesn't use DHCP for the interface,
|
|
# for instance.
|
|
path = os.path.join('/',
|
|
os.path.abspath(self.root_dir) if self.root_dir else "",
|
|
lease_pattern.format(interface=self.interface,
|
|
lease_id=lease_id))
|
|
# Fallback to 'dhclient' if no lease of NetworkManager's
|
|
# internal DHCP client is found
|
|
if not os.path.isfile(path):
|
|
path = path.replace('NetworkManager/internal-', 'NetworkManager/dhclient-')
|
|
with open(path) as f:
|
|
for line in f.readlines():
|
|
print(line.rstrip())
|
|
except Exception as e:
|
|
print("No lease found for interface '%s': %s" % (self.interface, str(e)),
|
|
file=sys.stderr)
|
|
sys.exit(1)
|
|
|
|
argv = [utils.get_generator_path()]
|
|
if self.root_dir:
|
|
argv += ['--root-dir', self.root_dir]
|
|
argv += ['--mapping', self.interface]
|
|
|
|
# Extract out of the generator our mapping in a dict.
|
|
logging.debug('command ip leases: running %s', argv)
|
|
try:
|
|
out = subprocess.check_output(argv, text=True)
|
|
except CalledProcessError: # pragma: nocover (better be covered in autopkgtest)
|
|
print("No lease found for interface '%s' (not managed by Netplan)" % self.interface, file=sys.stderr)
|
|
sys.exit(1)
|
|
mapping = {}
|
|
mapping_s = out.split(',')
|
|
for keyvalue in mapping_s:
|
|
key, value = keyvalue.strip().split('=')
|
|
mapping[key] = value
|
|
|
|
find_lease_file(mapping)
|