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

5 files changed, 201 insertions, 289 deletions

diff --git a/src/migration-scripts/dhcpv6-server/0-to-1 b/src/migration-scripts/dhcpv6-server/0-to-1
index deae1ca29..fd9b2d739 100755..100644
--- a/src/migration-scripts/dhcpv6-server/0-to-1
+++ b/src/migration-scripts/dhcpv6-server/0-to-1
@@ -1,39 +1,29 @@
-#!/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/>.
 
 # combine both sip-server-address and sip-server-name nodes to common sip-server
 
-from sys import argv, exit
 from vyos.configtree import ConfigTree
 
-if len(argv) < 2:
-    print("Must specify file name!")
-    exit(1)
-
-file_name = argv[1]
+base = ['service', 'dhcpv6-server', 'shared-network-name']
 
-with open(file_name, 'r') as f:
-    config_file = f.read()
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
 
-config = ConfigTree(config_file)
-base = ['service', 'dhcpv6-server', 'shared-network-name']
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-else:
     # we need to run this for every configured network
     for network in config.list_nodes(base):
         for subnet in config.list_nodes(base + [network, 'subnet']):
@@ -52,10 +42,3 @@ else:
             # Write new CLI value for sip-server
             for server in sip_server:
                 config.set(base + [network, 'subnet', subnet, 'sip-server'], value=server, 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))
-        exit(1)
diff --git a/src/migration-scripts/dhcpv6-server/1-to-2 b/src/migration-scripts/dhcpv6-server/1-to-2
index cc5a8900a..ad307495c 100755..100644
--- a/src/migration-scripts/dhcpv6-server/1-to-2
+++ b/src/migration-scripts/dhcpv6-server/1-to-2
@@ -1,18 +1,17 @@
-#!/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/>.
 
 # T3316: Migrate to Kea
 # - Kea was meant to have support for key "prefix-highest" under PD which would allow an address range
@@ -20,67 +19,50 @@
 #   Ref: https://lists.isc.org/pipermail/kea-users/2022-November/003686.html
 # - Remove prefix temporary value, convert to multi leafNode (https://kea.readthedocs.io/en/kea-2.2.0/arm/dhcp6-srv.html#dhcpv6-server-limitations)
 
-import sys
 from vyos.configtree import ConfigTree
 from vyos.utils.network import ipv6_prefix_length
 
-if (len(sys.argv) < 1):
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
 base = ['service', 'dhcpv6-server', 'shared-network-name']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
 
-for network in config.list_nodes(base):
-    if not config.exists(base + [network, 'subnet']):
-        continue
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
 
-    for subnet in config.list_nodes(base + [network, 'subnet']):
-        # Delete temporary value under address-range prefix, convert tagNode to leafNode multi
-        if config.exists(base + [network, 'subnet', subnet, 'address-range', 'prefix']):
-            prefix_base = base + [network, 'subnet', subnet, 'address-range', 'prefix']
-            prefixes = config.list_nodes(prefix_base)
-            
-            config.delete(prefix_base)
+    for network in config.list_nodes(base):
+        if not config.exists(base + [network, 'subnet']):
+            continue
 
-            for prefix in prefixes:
-                config.set(prefix_base, value=prefix, replace=False)
+        for subnet in config.list_nodes(base + [network, 'subnet']):
+            # Delete temporary value under address-range prefix, convert tagNode to leafNode multi
+            if config.exists(base + [network, 'subnet', subnet, 'address-range', 'prefix']):
+                prefix_base = base + [network, 'subnet', subnet, 'address-range', 'prefix']
+                prefixes = config.list_nodes(prefix_base)
+                
+                config.delete(prefix_base)
 
-        if config.exists(base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']):
-            prefix_base = base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']
+                for prefix in prefixes:
+                    config.set(prefix_base, value=prefix, replace=False)
 
-            config.set(prefix_base)
-            config.set_tag(prefix_base)
+            if config.exists(base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']):
+                prefix_base = base + [network, 'subnet', subnet, 'prefix-delegation', 'prefix']
 
-            for start in config.list_nodes(base + [network, 'subnet', subnet, 'prefix-delegation', 'start']):
-                path = base + [network, 'subnet', subnet, 'prefix-delegation', 'start', start]
+                config.set(prefix_base)
+                config.set_tag(prefix_base)
 
-                delegated_length = config.return_value(path + ['prefix-length'])
-                stop = config.return_value(path + ['stop'])
+                for start in config.list_nodes(base + [network, 'subnet', subnet, 'prefix-delegation', 'start']):
+                    path = base + [network, 'subnet', subnet, 'prefix-delegation', 'start', start]
 
-                prefix_length = ipv6_prefix_length(start, stop)
+                    delegated_length = config.return_value(path + ['prefix-length'])
+                    stop = config.return_value(path + ['stop'])
 
-                # This range could not be converted into a simple prefix length and must be skipped
-                if not prefix_length:
-                    continue
+                    prefix_length = ipv6_prefix_length(start, stop)
 
-                config.set(prefix_base + [start, 'delegated-length'], value=delegated_length)
-                config.set(prefix_base + [start, 'prefix-length'], value=prefix_length)
+                    # This range could not be converted into a simple prefix length and must be skipped
+                    if not prefix_length:
+                        continue
 
-            config.delete(base + [network, 'subnet', subnet, 'prefix-delegation', 'start'])
+                    config.set(prefix_base + [start, 'delegated-length'], value=delegated_length)
+                    config.set(prefix_base + [start, 'prefix-length'], value=prefix_length)
 
-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))
-    exit(1)
+                config.delete(base + [network, 'subnet', subnet, 'prefix-delegation', 'start'])
diff --git a/src/migration-scripts/dhcpv6-server/2-to-3 b/src/migration-scripts/dhcpv6-server/2-to-3
index f4bdc1d1e..b44798d18 100755..100644
--- a/src/migration-scripts/dhcpv6-server/2-to-3
+++ b/src/migration-scripts/dhcpv6-server/2-to-3
@@ -1,18 +1,17 @@
-#!/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/>.
 
 # T3316:
 # - Adjust hostname to have valid FQDN characters only (underscores aren't allowed anymore)
@@ -22,57 +21,40 @@
 # - Rename "service dhcpv6-server shared-network-name ... static-mapping <hostname> mac-address ..."
 #       to "service dhcpv6-server shared-network-name ... static-mapping <hostname> mac ..."
 
-import sys
 import re
 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()
-
 base = ['service', 'dhcpv6-server', 'shared-network-name']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    sys.exit(0)
-
-for network in config.list_nodes(base):
-    # Run this for every specified 'subnet'
-    if config.exists(base + [network, 'subnet']):
-        for subnet in config.list_nodes(base + [network, 'subnet']):
-            base_subnet = base + [network, 'subnet', subnet]
-            if config.exists(base_subnet + ['static-mapping']):
-                for hostname in config.list_nodes(base_subnet + ['static-mapping']):
-                    base_mapping = base_subnet + ['static-mapping', hostname]
-                    if config.exists(base_mapping + ['identifier']):
-
-                        # Adjust duid to comply with duid format (a:3:b:04:... => 0a:03:0b:04:...)
-                        duid = config.return_value(base_mapping + ['identifier'])
-                        new_duid = ':'.join(x.rjust(2,'0') for x in duid.split(':'))
-                        if new_duid != duid:
-                            config.set(base_mapping + ['identifier'], new_duid)
-
-                        # Rename the 'identifier' node to 'duid'
-                        config.rename(base_mapping + ['identifier'], 'duid')
-
-                    # Rename the 'mac-address' node to 'mac'
-                    if config.exists(base_mapping + ['mac-address']):
-                        config.rename(base_mapping + ['mac-address'], 'mac')
-
-                    # Adjust hostname to have valid FQDN characters only
-                    new_hostname = re.sub(r'[^a-zA-Z0-9-.]', '-', hostname)
-                    if new_hostname != hostname:
-                        config.rename(base_mapping, new_hostname)
 
-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))
-    exit(1)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    for network in config.list_nodes(base):
+        # Run this for every specified 'subnet'
+        if config.exists(base + [network, 'subnet']):
+            for subnet in config.list_nodes(base + [network, 'subnet']):
+                base_subnet = base + [network, 'subnet', subnet]
+                if config.exists(base_subnet + ['static-mapping']):
+                    for hostname in config.list_nodes(base_subnet + ['static-mapping']):
+                        base_mapping = base_subnet + ['static-mapping', hostname]
+                        if config.exists(base_mapping + ['identifier']):
+
+                            # Adjust duid to comply with duid format (a:3:b:04:... => 0a:03:0b:04:...)
+                            duid = config.return_value(base_mapping + ['identifier'])
+                            new_duid = ':'.join(x.rjust(2,'0') for x in duid.split(':'))
+                            if new_duid != duid:
+                                config.set(base_mapping + ['identifier'], new_duid)
+
+                            # Rename the 'identifier' node to 'duid'
+                            config.rename(base_mapping + ['identifier'], 'duid')
+
+                        # Rename the 'mac-address' node to 'mac'
+                        if config.exists(base_mapping + ['mac-address']):
+                            config.rename(base_mapping + ['mac-address'], 'mac')
+
+                        # Adjust hostname to have valid FQDN characters only
+                        new_hostname = re.sub(r'[^a-zA-Z0-9-.]', '-', hostname)
+                        if new_hostname != hostname:
+                            config.rename(base_mapping, new_hostname)
diff --git a/src/migration-scripts/dhcpv6-server/3-to-4 b/src/migration-scripts/dhcpv6-server/3-to-4
index 7efc492a5..e38e36505 100755..100644
--- a/src/migration-scripts/dhcpv6-server/3-to-4
+++ b/src/migration-scripts/dhcpv6-server/3-to-4
@@ -1,89 +1,72 @@
-#!/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/>.
 
 # T3316:
 # - Add subnet IDs to existing subnets
 # - Move options to option node
 # - Migrate address-range to range tagNode
 
-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()
-
 base = ['service', 'dhcpv6-server', 'shared-network-name']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    sys.exit(0)
 
 option_nodes = ['captive-portal', 'domain-search', 'name-server',
                 'nis-domain', 'nis-server', 'nisplus-domain', 'nisplus-server',
                 'sip-server', 'sntp-server', 'vendor-option']
 
-subnet_id = 1
 
-for network in config.list_nodes(base):
-    if config.exists(base + [network, 'subnet']):
-        for subnet in config.list_nodes(base + [network, 'subnet']):
-            base_subnet = base + [network, 'subnet', subnet]
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    subnet_id = 1
 
-            if config.exists(base_subnet + ['address-range']):
-                config.set(base_subnet + ['range'])
-                config.set_tag(base_subnet + ['range'])
+    for network in config.list_nodes(base):
+        if config.exists(base + [network, 'subnet']):
+            for subnet in config.list_nodes(base + [network, 'subnet']):
+                base_subnet = base + [network, 'subnet', subnet]
 
-                range_id = 1
+                if config.exists(base_subnet + ['address-range']):
+                    config.set(base_subnet + ['range'])
+                    config.set_tag(base_subnet + ['range'])
 
-                if config.exists(base_subnet + ['address-range', 'prefix']):
-                    for prefix in config.return_values(base_subnet + ['address-range', 'prefix']):
-                        config.set(base_subnet + ['range', range_id, 'prefix'], value=prefix)
+                    range_id = 1
 
-                        range_id += 1
+                    if config.exists(base_subnet + ['address-range', 'prefix']):
+                        for prefix in config.return_values(base_subnet + ['address-range', 'prefix']):
+                            config.set(base_subnet + ['range', range_id, 'prefix'], value=prefix)
 
-                if config.exists(base_subnet + ['address-range', 'start']):
-                    for start in config.list_nodes(base_subnet + ['address-range', 'start']):
-                        stop = config.return_value(base_subnet + ['address-range', 'start', start, 'stop'])
+                            range_id += 1
 
-                        config.set(base_subnet + ['range', range_id, 'start'], value=start)
-                        config.set(base_subnet + ['range', range_id, 'stop'], value=stop)
+                    if config.exists(base_subnet + ['address-range', 'start']):
+                        for start in config.list_nodes(base_subnet + ['address-range', 'start']):
+                            stop = config.return_value(base_subnet + ['address-range', 'start', start, 'stop'])
 
-                        range_id += 1
+                            config.set(base_subnet + ['range', range_id, 'start'], value=start)
+                            config.set(base_subnet + ['range', range_id, 'stop'], value=stop)
 
-                config.delete(base_subnet + ['address-range'])
+                            range_id += 1
 
-            for option in option_nodes:
-                if config.exists(base_subnet + [option]):
-                    config.set(base_subnet + ['option'])
-                    config.copy(base_subnet + [option], base_subnet + ['option', option])
-                    config.delete(base_subnet + [option])
+                    config.delete(base_subnet + ['address-range'])
 
-            config.set(base_subnet + ['subnet-id'], value=subnet_id)
-            subnet_id += 1
+                for option in option_nodes:
+                    if config.exists(base_subnet + [option]):
+                        config.set(base_subnet + ['option'])
+                        config.copy(base_subnet + [option], base_subnet + ['option', option])
+                        config.delete(base_subnet + [option])
 
-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))
-    exit(1)
+                config.set(base_subnet + ['subnet-id'], value=subnet_id)
+                subnet_id += 1
diff --git a/src/migration-scripts/dhcpv6-server/4-to-5 b/src/migration-scripts/dhcpv6-server/4-to-5
index 55fda91b3..ad18e1a84 100755..100644
--- a/src/migration-scripts/dhcpv6-server/4-to-5
+++ b/src/migration-scripts/dhcpv6-server/4-to-5
@@ -1,91 +1,73 @@
-#!/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/>.
 
 # T5993: Check if subnet is locally accessible and assign interface to subnet
 
-import sys
 from ipaddress import ip_network
 from vyos.configtree import ConfigTree
 
-if (len(sys.argv) < 1):
-    print("Must specify file name!")
-    sys.exit(1)
-
-file_name = sys.argv[1]
-
-with open(file_name, 'r') as f:
-    config_file = f.read()
-
 base = ['service', 'dhcpv6-server', 'shared-network-name']
-config = ConfigTree(config_file)
-
-if not config.exists(base):
-    # Nothing to do
-    exit(0)
-
-def find_subnet_interface(subnet):
-    subnet_net = ip_network(subnet)
-
-    def check_addr(if_path):
-        if config.exists(if_path + ['address']):
-            for addr in config.return_values(if_path + ['address']):
-                try:
-                    if ip_network(addr, strict=False) == subnet_net:
-                        return True
-                except:
-                    pass # interface address was probably "dhcp" or other magic string
-        return None
-
-    for iftype in config.list_nodes(['interfaces']):
-        for ifname in config.list_nodes(['interfaces', iftype]):
-            if_base = ['interfaces', iftype, ifname]
-
-            if check_addr(if_base):
-                return ifname
-
-            if config.exists(if_base + ['vif']):
-                for vif in config.list_nodes(if_base + ['vif']):
-                    if check_addr(if_base + ['vif', vif]):
-                        return f'{ifname}.{vif}'
-
-            if config.exists(if_base + ['vif-s']):
-                for vifs in config.list_nodes(if_base + ['vif-s']):
-                    if check_addr(if_base + ['vif-s', vifs]):
-                        return f'{ifname}.{vifs}'
-
-                    if config.exists(if_base + ['vif-s', vifs, 'vif-c']):
-                        for vifc in config.list_nodes(if_base + ['vif-s', vifs, 'vif-c']):
-                            if check_addr(if_base + ['vif-s', vifs, 'vif-c', vifc]):
-                                return f'{ifname}.{vifs}.{vifc}'
-
-    return False
-
-for network in config.list_nodes(base):
-    if not config.exists(base + [network, 'subnet']):
-        continue
-
-    for subnet in config.list_nodes(base + [network, 'subnet']):
-        subnet_interface = find_subnet_interface(subnet)
-
-        if subnet_interface:
-            config.set(base + [network, 'subnet', subnet, 'interface'], value=subnet_interface)
 
-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))
-    exit(1)
+def migrate(config: ConfigTree) -> None:
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    def find_subnet_interface(subnet):
+        subnet_net = ip_network(subnet)
+
+        def check_addr(if_path):
+            if config.exists(if_path + ['address']):
+                for addr in config.return_values(if_path + ['address']):
+                    try:
+                        if ip_network(addr, strict=False) == subnet_net:
+                            return True
+                    except:
+                        pass # interface address was probably "dhcp" or other magic string
+            return None
+
+        for iftype in config.list_nodes(['interfaces']):
+            for ifname in config.list_nodes(['interfaces', iftype]):
+                if_base = ['interfaces', iftype, ifname]
+
+                if check_addr(if_base):
+                    return ifname
+
+                if config.exists(if_base + ['vif']):
+                    for vif in config.list_nodes(if_base + ['vif']):
+                        if check_addr(if_base + ['vif', vif]):
+                            return f'{ifname}.{vif}'
+
+                if config.exists(if_base + ['vif-s']):
+                    for vifs in config.list_nodes(if_base + ['vif-s']):
+                        if check_addr(if_base + ['vif-s', vifs]):
+                            return f'{ifname}.{vifs}'
+
+                        if config.exists(if_base + ['vif-s', vifs, 'vif-c']):
+                            for vifc in config.list_nodes(if_base + ['vif-s', vifs, 'vif-c']):
+                                if check_addr(if_base + ['vif-s', vifs, 'vif-c', vifc]):
+                                    return f'{ifname}.{vifs}.{vifc}'
+
+        return False
+
+    for network in config.list_nodes(base):
+        if not config.exists(base + [network, 'subnet']):
+            continue
+
+        for subnet in config.list_nodes(base + [network, 'subnet']):
+            subnet_interface = find_subnet_interface(subnet)
+
+            if subnet_interface:
+                config.set(base + [network, 'subnet', subnet, 'interface'], value=subnet_interface)