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-rwxr-xr-xsrc/conf_mode/vpn_ipsec.py531
-rwxr-xr-xsrc/migration-scripts/ipsec/5-to-66
2 files changed, 6 insertions, 531 deletions
diff --git a/src/conf_mode/vpn_ipsec.py b/src/conf_mode/vpn_ipsec.py
deleted file mode 100755
index 645108a8f..000000000
--- a/src/conf_mode/vpn_ipsec.py
+++ /dev/null
@@ -1,531 +0,0 @@
-#!/usr/bin/env python3
-#
-# Copyright (C) 2021 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 ipaddress
-import os
-
-from sys import exit
-from time import sleep
-from time import time
-
-from vyos.config import Config
-from vyos.configdict import leaf_node_changed
-from vyos.configverify import verify_interface_exists
-from vyos.configdict import dict_merge
-from vyos.ifconfig import Interface
-from vyos.pki import encode_public_key
-from vyos.pki import load_private_key
-from vyos.pki import wrap_certificate
-from vyos.pki import wrap_crl
-from vyos.pki import wrap_public_key
-from vyos.pki import wrap_private_key
-from vyos.template import ip_from_cidr
-from vyos.template import render
-from vyos.validate import is_ipv6_link_local
-from vyos.util import call
-from vyos.util import dict_search_args
-from vyos.util import run
-from vyos.xml import defaults
-from vyos import ConfigError
-from vyos import airbag
-airbag.enable()
-
-dhcp_wait_attempts = 2
-dhcp_wait_sleep = 1
-
-swanctl_dir = '/etc/swanctl'
-ipsec_conf = '/etc/ipsec.conf'
-ipsec_secrets = '/etc/ipsec.secrets'
-charon_conf = '/etc/strongswan.d/charon.conf'
-charon_dhcp_conf = '/etc/strongswan.d/charon/dhcp.conf'
-interface_conf = '/etc/strongswan.d/interfaces_use.conf'
-swanctl_conf = f'{swanctl_dir}/swanctl.conf'
-
-default_install_routes = 'yes'
-
-vici_socket = '/var/run/charon.vici'
-
-CERT_PATH = f'{swanctl_dir}/x509/'
-PUBKEY_PATH = f'{swanctl_dir}/pubkey/'
-KEY_PATH = f'{swanctl_dir}/private/'
-CA_PATH = f'{swanctl_dir}/x509ca/'
-CRL_PATH = f'{swanctl_dir}/x509crl/'
-
-DHCP_BASE = '/var/lib/dhcp/dhclient'
-DHCP_HOOK_IFLIST = '/tmp/ipsec_dhcp_waiting'
-
-def get_config(config=None):
- if config:
- conf = config
- else:
- conf = Config()
- base = ['vpn', 'ipsec']
- l2tp_base = ['vpn', 'l2tp', 'remote-access', 'ipsec-settings']
- if not conf.exists(base):
- return None
-
- # retrieve common dictionary keys
- ipsec = conf.get_config_dict(base, key_mangling=('-', '_'),
- get_first_key=True, no_tag_node_value_mangle=True)
-
- # We have gathered the dict representation of the CLI, but there are default
- # options which we need to update into the dictionary retrived.
- default_values = defaults(base)
- # XXX: T2665: we must safely remove default values for tag nodes, those are
- # added in a more fine grained way later on
- del default_values['esp_group']
- del default_values['ike_group']
- del default_values['remote_access']
- ipsec = dict_merge(default_values, ipsec)
-
- if 'esp_group' in ipsec:
- default_values = defaults(base + ['esp-group'])
- for group in ipsec['esp_group']:
- ipsec['esp_group'][group] = dict_merge(default_values,
- ipsec['esp_group'][group])
- if 'ike_group' in ipsec:
- default_values = defaults(base + ['ike-group'])
- for group in ipsec['ike_group']:
- ipsec['ike_group'][group] = dict_merge(default_values,
- ipsec['ike_group'][group])
- if 'remote_access' in ipsec:
- default_values = defaults(base + ['remote-access'])
- for rw in ipsec['remote_access']:
- ipsec['remote_access'][rw] = dict_merge(default_values,
- ipsec['remote_access'][rw])
-
- ipsec['dhcp_no_address'] = {}
- ipsec['install_routes'] = 'no' if conf.exists(base + ["options", "disable-route-autoinstall"]) else default_install_routes
- ipsec['interface_change'] = leaf_node_changed(conf, base + ['ipsec-interfaces',
- 'interface'])
- ipsec['nhrp_exists'] = conf.exists(['protocols', 'nhrp', 'tunnel'])
- ipsec['pki'] = conf.get_config_dict(['pki'], key_mangling=('-', '_'),
- get_first_key=True,
- no_tag_node_value_mangle=True)
-
- ipsec['l2tp'] = conf.get_config_dict(l2tp_base, key_mangling=('-', '_'),
- get_first_key=True,
- no_tag_node_value_mangle=True)
- if ipsec['l2tp']:
- l2tp_defaults = defaults(l2tp_base)
- ipsec['l2tp'] = dict_merge(l2tp_defaults, ipsec['l2tp'])
- ipsec['l2tp_outside_address'] = conf.return_value(['vpn', 'l2tp', 'remote-access', 'outside-address'])
- ipsec['l2tp_ike_default'] = 'aes256-sha1-modp1024,3des-sha1-modp1024,3des-sha1-modp1024'
- ipsec['l2tp_esp_default'] = 'aes256-sha1,3des-sha1'
-
- return ipsec
-
-def get_dhcp_address(iface):
- addresses = Interface(iface).get_addr()
- if not addresses:
- return None
- for address in addresses:
- if not is_ipv6_link_local(address):
- return ip_from_cidr(address)
- return None
-
-def verify_pki_x509(pki, x509_conf):
- if not pki or 'ca' not in pki or 'certificate' not in pki:
- raise ConfigError(f'PKI is not configured')
-
- ca_cert_name = x509_conf['ca_certificate']
- cert_name = x509_conf['certificate']
-
- if not dict_search_args(pki, 'ca', ca_cert_name, 'certificate'):
- raise ConfigError(f'Missing CA certificate on specified PKI CA certificate "{ca_cert_name}"')
-
- if not dict_search_args(pki, 'certificate', cert_name, 'certificate'):
- raise ConfigError(f'Missing certificate on specified PKI certificate "{cert_name}"')
-
- if not dict_search_args(pki, 'certificate', cert_name, 'private', 'key'):
- raise ConfigError(f'Missing private key on specified PKI certificate "{cert_name}"')
-
- return True
-
-def verify_pki_rsa(pki, rsa_conf):
- if not pki or 'key_pair' not in pki:
- raise ConfigError(f'PKI is not configured')
-
- local_key = rsa_conf['local_key']
- remote_key = rsa_conf['remote_key']
-
- if not dict_search_args(pki, 'key_pair', local_key, 'private', 'key'):
- raise ConfigError(f'Missing private key on specified local-key "{local_key}"')
-
- if not dict_search_args(pki, 'key_pair', remote_key, 'public', 'key'):
- raise ConfigError(f'Missing public key on specified remote-key "{remote_key}"')
-
- return True
-
-def verify(ipsec):
- if not ipsec:
- return None
-
- if 'ipsec_interfaces' in ipsec and 'interface' in ipsec['ipsec_interfaces']:
- interfaces = ipsec['ipsec_interfaces']['interface']
- if isinstance(interfaces, str):
- interfaces = [interfaces]
-
- for ifname in interfaces:
- verify_interface_exists(ifname)
-
- if ipsec['l2tp']:
- if 'esp_group' in ipsec['l2tp']:
- if 'esp_group' not in ipsec or ipsec['l2tp']['esp_group'] not in ipsec['esp_group']:
- raise ConfigError(f"Invalid esp-group on L2TP remote-access config")
-
- if 'ike_group' in ipsec['l2tp']:
- if 'ike_group' not in ipsec or ipsec['l2tp']['ike_group'] not in ipsec['ike_group']:
- raise ConfigError(f"Invalid ike-group on L2TP remote-access config")
-
- if 'authentication' not in ipsec['l2tp']:
- raise ConfigError(f'Missing authentication settings on L2TP remote-access config')
-
- if 'mode' not in ipsec['l2tp']['authentication']:
- raise ConfigError(f'Missing authentication mode on L2TP remote-access config')
-
- if not ipsec['l2tp_outside_address']:
- raise ConfigError(f'Missing outside-address on L2TP remote-access config')
-
- if ipsec['l2tp']['authentication']['mode'] == 'pre-shared-secret':
- if 'pre_shared_secret' not in ipsec['l2tp']['authentication']:
- raise ConfigError(f'Missing pre shared secret on L2TP remote-access config')
-
- if ipsec['l2tp']['authentication']['mode'] == 'x509':
- if 'x509' not in ipsec['l2tp']['authentication']:
- raise ConfigError(f'Missing x509 settings on L2TP remote-access config')
-
- x509 = ipsec['l2tp']['authentication']['x509']
-
- if 'ca_certificate' not in x509 or 'certificate' not in x509:
- raise ConfigError(f'Missing x509 certificates on L2TP remote-access config')
-
- verify_pki_x509(ipsec['pki'], x509)
-
- if 'profile' in ipsec:
- for profile, profile_conf in ipsec['profile'].items():
- if 'esp_group' in profile_conf:
- if 'esp_group' not in ipsec or profile_conf['esp_group'] not in ipsec['esp_group']:
- raise ConfigError(f"Invalid esp-group on {profile} profile")
- else:
- raise ConfigError(f"Missing esp-group on {profile} profile")
-
- if 'ike_group' in profile_conf:
- if 'ike_group' not in ipsec or profile_conf['ike_group'] not in ipsec['ike_group']:
- raise ConfigError(f"Invalid ike-group on {profile} profile")
- else:
- raise ConfigError(f"Missing ike-group on {profile} profile")
-
- if 'authentication' not in profile_conf:
- raise ConfigError(f"Missing authentication on {profile} profile")
-
- if 'remote_access' in ipsec:
- for name, ra_conf in ipsec['remote_access'].items():
- if 'esp_group' in ra_conf:
- if 'esp_group' not in ipsec or ra_conf['esp_group'] not in ipsec['esp_group']:
- raise ConfigError(f"Invalid esp-group on {name} remote-access config")
- else:
- raise ConfigError(f"Missing esp-group on {name} remote-access config")
-
- if 'ike_group' in ra_conf:
- if 'ike_group' not in ipsec or ra_conf['ike_group'] not in ipsec['ike_group']:
- raise ConfigError(f"Invalid ike-group on {name} remote-access config")
- else:
- raise ConfigError(f"Missing ike-group on {name} remote-access config")
-
- if 'authentication' not in ra_conf:
- raise ConfigError(f"Missing authentication on {name} remote-access config")
-
- if ra_conf['authentication']['server_mode'] == 'x509':
- if 'x509' not in ra_conf['authentication']:
- raise ConfigError(f"Missing x509 settings on {name} remote-access config")
-
- x509 = ra_conf['authentication']['x509']
-
- if 'ca_certificate' not in x509 or 'certificate' not in x509:
- raise ConfigError(f"Missing x509 certificates on {name} remote-access config")
-
- verify_pki_x509(ipsec['pki'], x509)
- elif ra_conf['authentication']['server_mode'] == 'pre-shared-secret':
- if 'pre_shared_secret' not in ra_conf['authentication']:
- raise ConfigError(f"Missing pre-shared-key on {name} remote-access config")
-
- if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']:
- for peer, peer_conf in ipsec['site_to_site']['peer'].items():
- has_default_esp = False
- if 'default_esp_group' in peer_conf:
- has_default_esp = True
- if 'esp_group' not in ipsec or peer_conf['default_esp_group'] not in ipsec['esp_group']:
- raise ConfigError(f"Invalid esp-group on site-to-site peer {peer}")
-
- if 'ike_group' in peer_conf:
- if 'ike_group' not in ipsec or peer_conf['ike_group'] not in ipsec['ike_group']:
- raise ConfigError(f"Invalid ike-group on site-to-site peer {peer}")
- else:
- raise ConfigError(f"Missing ike-group on site-to-site peer {peer}")
-
- if 'authentication' not in peer_conf or 'mode' not in peer_conf['authentication']:
- raise ConfigError(f"Missing authentication on site-to-site peer {peer}")
-
- if peer_conf['authentication']['mode'] == 'x509':
- if 'x509' not in peer_conf['authentication']:
- raise ConfigError(f"Missing x509 settings on site-to-site peer {peer}")
-
- x509 = peer_conf['authentication']['x509']
-
- if 'ca_certificate' not in x509 or 'certificate' not in x509:
- raise ConfigError(f"Missing x509 certificates on site-to-site peer {peer}")
-
- verify_pki_x509(ipsec['pki'], x509)
- elif peer_conf['authentication']['mode'] == 'rsa':
- if 'rsa' not in peer_conf['authentication']:
- raise ConfigError(f"Missing RSA settings on site-to-site peer {peer}")
-
- rsa = peer_conf['authentication']['rsa']
-
- if 'local_key' not in rsa:
- raise ConfigError(f"Missing RSA local-key on site-to-site peer {peer}")
-
- if 'remote_key' not in rsa:
- raise ConfigError(f"Missing RSA remote-key on site-to-site peer {peer}")
-
- verify_pki_rsa(ipsec['pki'], rsa)
-
- if 'local_address' not in peer_conf and 'dhcp_interface' not in peer_conf:
- raise ConfigError(f"Missing local-address or dhcp-interface on site-to-site peer {peer}")
-
- if 'dhcp_interface' in peer_conf:
- dhcp_interface = peer_conf['dhcp_interface']
-
- verify_interface_exists(dhcp_interface)
-
- if not os.path.exists(f'{DHCP_BASE}_{dhcp_interface}.conf'):
- raise ConfigError(f"Invalid dhcp-interface on site-to-site peer {peer}")
-
- address = get_dhcp_address(dhcp_interface)
- count = 0
- while not address and count < dhcp_wait_attempts:
- address = get_dhcp_address(dhcp_interface)
- count += 1
- sleep(dhcp_wait_sleep)
-
- if not address:
- ipsec['dhcp_no_address'][peer] = dhcp_interface
- print(f"Failed to get address from dhcp-interface on site-to-site peer {peer} -- skipped")
- continue
-
- if 'vti' in peer_conf:
- if 'local_address' in peer_conf and 'dhcp_interface' in peer_conf:
- raise ConfigError(f"A single local-address or dhcp-interface is required when using VTI on site-to-site peer {peer}")
-
- if 'bind' in peer_conf['vti']:
- vti_interface = peer_conf['vti']['bind']
- if not os.path.exists(f'/sys/class/net/{vti_interface}'):
- raise ConfigError(f'VTI interface {vti_interface} for site-to-site peer {peer} does not exist!')
-
- if 'vti' not in peer_conf and 'tunnel' not in peer_conf:
- raise ConfigError(f"No VTI or tunnel specified on site-to-site peer {peer}")
-
- if 'tunnel' in peer_conf:
- for tunnel, tunnel_conf in peer_conf['tunnel'].items():
- if 'esp_group' not in tunnel_conf and not has_default_esp:
- raise ConfigError(f"Missing esp-group on tunnel {tunnel} for site-to-site peer {peer}")
-
- esp_group_name = tunnel_conf['esp_group'] if 'esp_group' in tunnel_conf else peer_conf['default_esp_group']
-
- if esp_group_name not in ipsec['esp_group']:
- raise ConfigError(f"Invalid esp-group on tunnel {tunnel} for site-to-site peer {peer}")
-
- esp_group = ipsec['esp_group'][esp_group_name]
-
- if 'mode' in esp_group and esp_group['mode'] == 'transport':
- if 'protocol' in tunnel_conf and ((peer in ['any', '0.0.0.0']) or ('local_address' not in peer_conf or peer_conf['local_address'] in ['any', '0.0.0.0'])):
- raise ConfigError(f"Fixed local-address or peer required when a protocol is defined with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}")
-
- if ('local' in tunnel_conf and 'prefix' in tunnel_conf['local']) or ('remote' in tunnel_conf and 'prefix' in tunnel_conf['remote']):
- raise ConfigError(f"Local/remote prefix cannot be used with ESP transport mode on tunnel {tunnel} for site-to-site peer {peer}")
-
-def cleanup_pki_files():
- for path in [CERT_PATH, CA_PATH, CRL_PATH, KEY_PATH, PUBKEY_PATH]:
- if not os.path.exists(path):
- continue
- for file in os.listdir(path):
- file_path = os.path.join(path, file)
- if os.path.isfile(file_path):
- os.unlink(file_path)
-
-def generate_pki_files_x509(pki, x509_conf):
- ca_cert_name = x509_conf['ca_certificate']
- ca_cert_data = dict_search_args(pki, 'ca', ca_cert_name, 'certificate')
- ca_cert_crls = dict_search_args(pki, 'ca', ca_cert_name, 'crl') or []
- crl_index = 1
-
- cert_name = x509_conf['certificate']
- cert_data = dict_search_args(pki, 'certificate', cert_name, 'certificate')
- key_data = dict_search_args(pki, 'certificate', cert_name, 'private', 'key')
- protected = 'passphrase' in x509_conf
-
- with open(os.path.join(CA_PATH, f'{ca_cert_name}.pem'), 'w') as f:
- f.write(wrap_certificate(ca_cert_data))
-
- for crl in ca_cert_crls:
- with open(os.path.join(CRL_PATH, f'{ca_cert_name}_{crl_index}.pem'), 'w') as f:
- f.write(wrap_crl(crl))
- crl_index += 1
-
- with open(os.path.join(CERT_PATH, f'{cert_name}.pem'), 'w') as f:
- f.write(wrap_certificate(cert_data))
-
- with open(os.path.join(KEY_PATH, f'x509_{cert_name}.pem'), 'w') as f:
- f.write(wrap_private_key(key_data, protected))
-
-def generate_pki_files_rsa(pki, rsa_conf):
- local_key_name = rsa_conf['local_key']
- local_key_data = dict_search_args(pki, 'key_pair', local_key_name, 'private', 'key')
- protected = 'passphrase' in rsa_conf
- remote_key_name = rsa_conf['remote_key']
- remote_key_data = dict_search_args(pki, 'key_pair', remote_key_name, 'public', 'key')
-
- local_key = load_private_key(local_key_data, rsa_conf['passphrase'] if protected else None)
-
- with open(os.path.join(KEY_PATH, f'rsa_{local_key_name}.pem'), 'w') as f:
- f.write(wrap_private_key(local_key_data, protected))
-
- with open(os.path.join(PUBKEY_PATH, f'{local_key_name}.pem'), 'w') as f:
- f.write(encode_public_key(local_key.public_key()))
-
- with open(os.path.join(PUBKEY_PATH, f'{remote_key_name}.pem'), 'w') as f:
- f.write(wrap_public_key(remote_key_data))
-
-def generate(ipsec):
- cleanup_pki_files()
-
- if not ipsec:
- for config_file in [ipsec_conf, ipsec_secrets, charon_dhcp_conf, interface_conf, swanctl_conf]:
- if os.path.isfile(config_file):
- os.unlink(config_file)
- render(charon_conf, 'ipsec/charon.tmpl', {'install_routes': default_install_routes})
- return
-
- if ipsec['dhcp_no_address']:
- with open(DHCP_HOOK_IFLIST, 'w') as f:
- f.write(" ".join(ipsec['dhcp_no_address'].values()))
-
- for path in [swanctl_dir, CERT_PATH, CA_PATH, CRL_PATH, PUBKEY_PATH]:
- if not os.path.exists(path):
- os.mkdir(path, mode=0o755)
-
- if not os.path.exists(KEY_PATH):
- os.mkdir(KEY_PATH, mode=0o700)
-
- if ipsec['l2tp']:
- if 'authentication' in ipsec['l2tp'] and 'x509' in ipsec['l2tp']['authentication']:
- generate_pki_files_x509(ipsec['pki'], ipsec['l2tp']['authentication']['x509'])
-
- if 'remote_access' in ipsec:
- for rw, rw_conf in ipsec['remote_access'].items():
- if 'authentication' in rw_conf and 'x509' in rw_conf['authentication']:
- generate_pki_files_x509(ipsec['pki'], rw_conf['authentication']['x509'])
-
- if 'site_to_site' in ipsec and 'peer' in ipsec['site_to_site']:
- for peer, peer_conf in ipsec['site_to_site']['peer'].items():
- if peer in ipsec['dhcp_no_address']:
- continue
-
- if peer_conf['authentication']['mode'] == 'x509':
- generate_pki_files_x509(ipsec['pki'], peer_conf['authentication']['x509'])
- elif peer_conf['authentication']['mode'] == 'rsa':
- generate_pki_files_rsa(ipsec['pki'], peer_conf['authentication']['rsa'])
-
- local_ip = ''
- if 'local_address' in peer_conf:
- local_ip = peer_conf['local_address']
- elif 'dhcp_interface' in peer_conf:
- local_ip = get_dhcp_address(peer_conf['dhcp_interface'])
-
- ipsec['site_to_site']['peer'][peer]['local_address'] = local_ip
-
- if 'tunnel' in peer_conf:
- for tunnel, tunnel_conf in peer_conf['tunnel'].items():
- local_prefixes = dict_search_args(tunnel_conf, 'local', 'prefix')
- remote_prefixes = dict_search_args(tunnel_conf, 'remote', 'prefix')
-
- if not local_prefixes or not remote_prefixes:
- continue
-
- passthrough = []
-
- for local_prefix in local_prefixes:
- for remote_prefix in remote_prefixes:
- local_net = ipaddress.ip_network(local_prefix)
- remote_net = ipaddress.ip_network(remote_prefix)
- if local_net.overlaps(remote_net):
- passthrough.append(local_prefix)
-
- ipsec['site_to_site']['peer'][peer]['tunnel'][tunnel]['passthrough'] = passthrough
-
-
- render(ipsec_conf, 'ipsec/ipsec.conf.tmpl', ipsec)
- render(ipsec_secrets, 'ipsec/ipsec.secrets.tmpl', ipsec)
- render(charon_conf, 'ipsec/charon.tmpl', ipsec)
- render(charon_dhcp_conf, 'ipsec/charon/dhcp.conf.tmpl', ipsec)
- render(interface_conf, 'ipsec/interfaces_use.conf.tmpl', ipsec)
- render(swanctl_conf, 'ipsec/swanctl.conf.tmpl', ipsec)
-
-def resync_nhrp(ipsec):
- if ipsec and not ipsec['nhrp_exists']:
- return
-
- tmp = run('/usr/libexec/vyos/conf_mode/protocols_nhrp.py')
- if tmp > 0:
- print('ERROR: failed to reapply NHRP settings!')
-
-def wait_for_vici_socket(timeout=5, sleep_interval=0.1):
- start_time = time()
- test_command = f'sudo socat -u OPEN:/dev/null UNIX-CONNECT:{vici_socket}'
- while True:
- if (start_time + timeout) < time():
- return None
- result = run(test_command)
- if result == 0:
- return True
- sleep(sleep_interval)
-
-def apply(ipsec):
- if not ipsec:
- call('sudo ipsec stop')
- else:
- args = ''
- if 'auto_update' in ipsec:
- args = '--auto-update ' + ipsec['auto_update']
- call(f'sudo ipsec restart {args}')
- call('sudo ipsec rereadall')
- call('sudo ipsec reload')
-
- if wait_for_vici_socket():
- call('sudo swanctl -q')
-
- resync_nhrp(ipsec)
-
-if __name__ == '__main__':
- try:
- ipsec = get_config()
- verify(ipsec)
- generate(ipsec)
- apply(ipsec)
- except ConfigError as e:
- print(e)
- exit(1)
diff --git a/src/migration-scripts/ipsec/5-to-6 b/src/migration-scripts/ipsec/5-to-6
index ba5ce0fca..76ee9ecba 100755
--- a/src/migration-scripts/ipsec/5-to-6
+++ b/src/migration-scripts/ipsec/5-to-6
@@ -74,6 +74,12 @@ log_mode = log + ['log-modes']
if config.exists(log_mode):
config.rename(log_mode, 'subsystem')
+# Rename "ipsec-interfaces interface" to "interface"
+base_interfaces = base + ['ipsec-interfaces', 'interface']
+if config.exists(base_interfaces):
+ config.copy(base_interfaces, base + ['interface'])
+ config.delete(base_interfaces)
+
try:
with open(file_name, 'w') as f:
f.write(config.to_string())