migration: T6007: convert all migration scripts to load as module

(cherry picked from commit 26740a8d583f64dc0a27b59dd4ae303056972c0b)

6 files changed, 183 insertions, 297 deletions

diff --git a/src/migration-scripts/https/0-to-1 b/src/migration-scripts/https/0-to-1
index 23809f5ad..52fe3f2ad 100755..100644
--- a/src/migration-scripts/https/0-to-1
+++ b/src/migration-scripts/https/0-to-1
@@ -1,42 +1,30 @@
-#!/usr/bin/env python3
+# Copyright 202-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2020 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # * Move server block directives under 'virtual-host' tag node, instead of
 #   relying on 'listen-address' tag node
 
-import sys
-
 from vyos.configtree import ConfigTree
 
-if (len(sys.argv) < 2):
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
+old_base = ['service', 'https', 'listen-address']
 
-config = ConfigTree(config_file)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(old_base):
+        # Nothing to do
+        return
 
-old_base = ['service', 'https', 'listen-address']
-if not config.exists(old_base):
-    # Nothing to do
-    sys.exit(0)
-else:
     new_base = ['service', 'https', 'virtual-host']
     config.set(new_base)
     config.set_tag(new_base)
@@ -60,10 +48,3 @@ else:
         index += 1
 
     config.delete(old_base)
-
-    try:
-        with open(file_name, 'w') as f:
-            f.write(config.to_string())
-    except OSError as e:
-        print("Failed to save the modified config: {}".format(e))
-        sys.exit(1)
diff --git a/src/migration-scripts/https/1-to-2 b/src/migration-scripts/https/1-to-2
index 1a2cdc1e7..dad7ac1f0 100755..100644
--- a/src/migration-scripts/https/1-to-2
+++ b/src/migration-scripts/https/1-to-2
@@ -1,42 +1,30 @@
-#!/usr/bin/env python3
+# Copyright 2020-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2020 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # * Move 'api virtual-host' list to 'api-restrict virtual-host' so it
 #   is owned by service_https.py
 
-import sys
-
 from vyos.configtree import ConfigTree
 
-if (len(sys.argv) < 2):
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
+old_base = ['service', 'https', 'api', 'virtual-host']
 
-config = ConfigTree(config_file)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(old_base):
+        # Nothing to do
+        return
 
-old_base = ['service', 'https', 'api', 'virtual-host']
-if not config.exists(old_base):
-    # Nothing to do
-    sys.exit(0)
-else:
     new_base = ['service', 'https', 'api-restrict', 'virtual-host']
     config.set(new_base)
 
@@ -45,10 +33,3 @@ else:
         config.set(new_base, value=name, replace=False)
 
     config.delete(old_base)
-
-    try:
-        with open(file_name, 'w') as f:
-            f.write(config.to_string())
-    except OSError as e:
-        print("Failed to save the modified config: {}".format(e))
-        sys.exit(1)
diff --git a/src/migration-scripts/https/2-to-3 b/src/migration-scripts/https/2-to-3
index 2beba6d2b..1125caebf 100755..100644
--- a/src/migration-scripts/https/2-to-3
+++ b/src/migration-scripts/https/2-to-3
@@ -1,23 +1,20 @@
-#!/usr/bin/env python3
+# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2021 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # * Migrate system signed certificate to use PKI
 
-import sys
-
 from vyos.configtree import ConfigTree
 from vyos.pki import create_certificate
 from vyos.pki import create_certificate_request
@@ -25,23 +22,9 @@ from vyos.pki import create_private_key
 from vyos.pki import encode_certificate
 from vyos.pki import encode_private_key
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-
 base = ['service', 'https', 'certificates']
 pki_base = ['pki']
 
-if not config.exists(base + ['system-generated-certificate']):
-    sys.exit(0)
-
 def wrapped_pem_to_config_value(pem):
     out = []
     for line in pem.strip().split("\n"):
@@ -50,37 +33,34 @@ def wrapped_pem_to_config_value(pem):
         out.append(line)
     return "".join(out)
 
-if not config.exists(pki_base + ['certificate']):
-    config.set(pki_base + ['certificate'])
-    config.set_tag(pki_base + ['certificate'])
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base + ['system-generated-certificate']):
+        return
 
-valid_days = 365
-if config.exists(base + ['system-generated-certificate', 'lifetime']):
-    valid_days = int(config.return_value(base + ['system-generated-certificate', 'lifetime']))
+    if not config.exists(pki_base + ['certificate']):
+        config.set(pki_base + ['certificate'])
+        config.set_tag(pki_base + ['certificate'])
 
-key = create_private_key('rsa', 2048)
-subject = {'country': 'GB', 'state': 'N/A', 'locality': 'N/A', 'organization': 'VyOS', 'common_name': 'vyos'}
-cert_req = create_certificate_request(subject, key, ['vyos'])
-cert = create_certificate(cert_req, cert_req, key, valid_days)
+    valid_days = 365
+    if config.exists(base + ['system-generated-certificate', 'lifetime']):
+        valid_days = int(config.return_value(base + ['system-generated-certificate', 'lifetime']))
 
-if cert:
-    cert_pem = encode_certificate(cert)
-    config.set(pki_base + ['certificate', 'generated_https', 'certificate'], value=wrapped_pem_to_config_value(cert_pem))
+    key = create_private_key('rsa', 2048)
+    subject = {'country': 'GB', 'state': 'N/A', 'locality': 'N/A', 'organization': 'VyOS', 'common_name': 'vyos'}
+    cert_req = create_certificate_request(subject, key, ['vyos'])
+    cert = create_certificate(cert_req, cert_req, key, valid_days)
 
-if key:
-    key_pem = encode_private_key(key)
-    config.set(pki_base + ['certificate', 'generated_https', 'private', 'key'], value=wrapped_pem_to_config_value(key_pem))
+    if cert:
+        cert_pem = encode_certificate(cert)
+        config.set(pki_base + ['certificate', 'generated_https', 'certificate'], value=wrapped_pem_to_config_value(cert_pem))
 
-if cert and key:
-    config.set(base + ['certificate'], value='generated_https')
-else:
-    print('Failed to migrate system-generated-certificate from https service')
+    if key:
+        key_pem = encode_private_key(key)
+        config.set(pki_base + ['certificate', 'generated_https', 'private', 'key'], value=wrapped_pem_to_config_value(key_pem))
 
-config.delete(base + ['system-generated-certificate'])
+    if cert and key:
+        config.set(base + ['certificate'], value='generated_https')
+    else:
+        print('Failed to migrate system-generated-certificate from https service')
 
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print("Failed to save the modified config: {}".format(e))
-    sys.exit(1)
+    config.delete(base + ['system-generated-certificate'])
diff --git a/src/migration-scripts/https/3-to-4 b/src/migration-scripts/https/3-to-4
index b3cfca201..c01236cc6 100755..100644
--- a/src/migration-scripts/https/3-to-4
+++ b/src/migration-scripts/https/3-to-4
@@ -1,53 +1,34 @@
-#!/usr/bin/env python3
+# Copyright 2022-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2022 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # T4768 rename node 'gql' to 'graphql'.
 
-import sys
-
 from vyos.configtree import ConfigTree
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-
 old_base = ['service', 'https', 'api', 'gql']
-if not config.exists(old_base):
-    # Nothing to do
-    sys.exit(0)
-
 new_base = ['service', 'https', 'api', 'graphql']
-config.set(new_base)
 
-nodes = config.list_nodes(old_base)
-for node in nodes:
-    config.copy(old_base + [node], new_base + [node])
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(old_base):
+        # Nothing to do
+        return
+
+    config.set(new_base)
 
-config.delete(old_base)
+    nodes = config.list_nodes(old_base)
+    for node in nodes:
+        config.copy(old_base + [node], new_base + [node])
 
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print("Failed to save the modified config: {}".format(e))
-    sys.exit(1)
+    config.delete(old_base)
diff --git a/src/migration-scripts/https/4-to-5 b/src/migration-scripts/https/4-to-5
index 0dfb6ac19..0f1c7901f 100755..100644
--- a/src/migration-scripts/https/4-to-5
+++ b/src/migration-scripts/https/4-to-5
@@ -1,62 +1,43 @@
-#!/usr/bin/env python3
+# Copyright 2023-2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2023 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # T5762: http: api: smoketests fail as they can not establish IPv6 connection
 #        to uvicorn backend server, always make the UNIX domain socket the
 #        default way of communication
 
-import sys
-
 from vyos.configtree import ConfigTree
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-
 base = ['service', 'https']
-if not config.exists(base):
-    # Nothing to do
-    sys.exit(0)
-
-# Delete "socket" CLI option - we always use UNIX domain sockets for
-# NGINX <-> API server communication
-if config.exists(base + ['api', 'socket']):
-    config.delete(base + ['api', 'socket'])
-
-# There is no need for an API service port, as UNIX domain sockets
-# are used
-if config.exists(base + ['api', 'port']):
-    config.delete(base + ['api', 'port'])
-
-# rename listen-port -> port ver virtual-host
-if config.exists(base + ['virtual-host']):
-    for vhost in config.list_nodes(base + ['virtual-host']):
-        if config.exists(base + ['virtual-host', vhost, 'listen-port']):
-            config.rename(base + ['virtual-host', vhost, 'listen-port'], 'port')
 
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print("Failed to save the modified config: {}".format(e))
-    sys.exit(1)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    # Delete "socket" CLI option - we always use UNIX domain sockets for
+    # NGINX <-> API server communication
+    if config.exists(base + ['api', 'socket']):
+        config.delete(base + ['api', 'socket'])
+
+    # There is no need for an API service port, as UNIX domain sockets
+    # are used
+    if config.exists(base + ['api', 'port']):
+        config.delete(base + ['api', 'port'])
+
+    # rename listen-port -> port ver virtual-host
+    if config.exists(base + ['virtual-host']):
+        for vhost in config.list_nodes(base + ['virtual-host']):
+            if config.exists(base + ['virtual-host', vhost, 'listen-port']):
+                config.rename(base + ['virtual-host', vhost, 'listen-port'], 'port')
diff --git a/src/migration-scripts/https/5-to-6 b/src/migration-scripts/https/5-to-6
index 72e9e31f7..6ef6976b6 100755..100644
--- a/src/migration-scripts/https/5-to-6
+++ b/src/migration-scripts/https/5-to-6
@@ -1,25 +1,23 @@
-#!/usr/bin/env python3
+# Copyright 2024 VyOS maintainers and contributors <maintainers@vyos.io>
 #
-# Copyright (C) 2024 VyOS maintainers and contributors
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
 #
-# 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,
+# This library 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.
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser 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/>.
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library.  If not, see <http://www.gnu.org/licenses/>.
 
 # T5886: Add support for ACME protocol (LetsEncrypt), migrate https certbot
 #        to new "pki certificate" CLI tree
 # T5902: Remove virtual-host
 
 import os
-import sys
 
 from vyos.configtree import ConfigTree
 from vyos.defaults import directories
@@ -27,81 +25,65 @@ from vyos.utils.process import cmd
 
 vyos_certbot_dir = directories['certbot']
 
-if len(sys.argv) < 2:
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
-config = ConfigTree(config_file)
-
 base = ['service', 'https']
-if not config.exists(base):
-    # Nothing to do
-    sys.exit(0)
-
-if config.exists(base + ['certificates', 'certbot']):
-    # both domain-name and email must be set on CLI - ensured by previous verify()
-    domain_names = config.return_values(base + ['certificates', 'certbot', 'domain-name'])
-    email = config.return_value(base + ['certificates', 'certbot', 'email'])
-    config.delete(base + ['certificates', 'certbot'])
-
-    # Set default certname based on domain-name
-    cert_name = 'https-' + domain_names[0].split('.')[0]
-    # Overwrite certname from previous certbot calls if available
-    # We can not use python code like os.scandir due to filesystem permissions.
-    # This must be run as root
-    certbot_live = f'{vyos_certbot_dir}/live/' # we need the trailing /
-    if os.path.exists(certbot_live):
-        tmp = cmd(f'sudo find {certbot_live} -maxdepth 1 -type d')
-        tmp = tmp.split() # tmp = ['/config/auth/letsencrypt/live', '/config/auth/letsencrypt/live/router.vyos.net']
-        tmp.remove(certbot_live)
-        cert_name = tmp[0].replace(certbot_live, '')
 
-    config.set(['pki', 'certificate', cert_name, 'acme', 'email'], value=email)
-    config.set_tag(['pki', 'certificate'])
-    for domain in domain_names:
-        config.set(['pki', 'certificate', cert_name, 'acme', 'domain-name'], value=domain, replace=False)
-
-    # Update Webserver certificate
-    config.set(base + ['certificates', 'certificate'], value=cert_name)
-
-if config.exists(base + ['virtual-host']):
-    allow_client = []
-    listen_port = []
-    listen_address = []
-    for virtual_host in config.list_nodes(base + ['virtual-host']):
-        allow_path = base + ['virtual-host', virtual_host, 'allow-client', 'address']
-        if config.exists(allow_path):
-            tmp = config.return_values(allow_path)
-            allow_client.extend(tmp)
-
-        port_path = base + ['virtual-host', virtual_host, 'port']
-        if config.exists(port_path):
-            tmp = config.return_value(port_path)
-            listen_port.append(tmp)
-
-        listen_address_path = base + ['virtual-host', virtual_host, 'listen-address']
-        if config.exists(listen_address_path):
-            tmp = config.return_value(listen_address_path)
-            listen_address.append(tmp)
-
-    config.delete(base + ['virtual-host'])
-    for client in allow_client:
-        config.set(base + ['allow-client', 'address'], value=client, replace=False)
-
-    #  clear listen-address if "all" were specified
-    if '*' in listen_address:
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    if config.exists(base + ['certificates', 'certbot']):
+        # both domain-name and email must be set on CLI - ensured by previous verify()
+        domain_names = config.return_values(base + ['certificates', 'certbot', 'domain-name'])
+        email = config.return_value(base + ['certificates', 'certbot', 'email'])
+        config.delete(base + ['certificates', 'certbot'])
+
+        # Set default certname based on domain-name
+        cert_name = 'https-' + domain_names[0].split('.')[0]
+        # Overwrite certname from previous certbot calls if available
+        # We can not use python code like os.scandir due to filesystem permissions.
+        # This must be run as root
+        certbot_live = f'{vyos_certbot_dir}/live/' # we need the trailing /
+        if os.path.exists(certbot_live):
+            tmp = cmd(f'sudo find {certbot_live} -maxdepth 1 -type d')
+            tmp = tmp.split() # tmp = ['/config/auth/letsencrypt/live', '/config/auth/letsencrypt/live/router.vyos.net']
+            tmp.remove(certbot_live)
+            cert_name = tmp[0].replace(certbot_live, '')
+
+        config.set(['pki', 'certificate', cert_name, 'acme', 'email'], value=email)
+        config.set_tag(['pki', 'certificate'])
+        for domain in domain_names:
+            config.set(['pki', 'certificate', cert_name, 'acme', 'domain-name'], value=domain, replace=False)
+
+        # Update Webserver certificate
+        config.set(base + ['certificates', 'certificate'], value=cert_name)
+
+    if config.exists(base + ['virtual-host']):
+        allow_client = []
+        listen_port = []
         listen_address = []
-    for address in listen_address:
-        config.set(base + ['listen-address'], value=address, replace=False)
-
-try:
-    with open(file_name, 'w') as f:
-        f.write(config.to_string())
-except OSError as e:
-    print("Failed to save the modified config: {}".format(e))
-    sys.exit(1)
+        for virtual_host in config.list_nodes(base + ['virtual-host']):
+            allow_path = base + ['virtual-host', virtual_host, 'allow-client', 'address']
+            if config.exists(allow_path):
+                tmp = config.return_values(allow_path)
+                allow_client.extend(tmp)
+
+            port_path = base + ['virtual-host', virtual_host, 'port']
+            if config.exists(port_path):
+                tmp = config.return_value(port_path)
+                listen_port.append(tmp)
+
+            listen_address_path = base + ['virtual-host', virtual_host, 'listen-address']
+            if config.exists(listen_address_path):
+                tmp = config.return_value(listen_address_path)
+                listen_address.append(tmp)
+
+        config.delete(base + ['virtual-host'])
+        for client in allow_client:
+            config.set(base + ['allow-client', 'address'], value=client, replace=False)
+
+        #  clear listen-address if "all" were specified
+        if '*' in listen_address:
+            listen_address = []
+        for address in listen_address:
+            config.set(base + ['listen-address'], value=address, replace=False)