1 files changed, 86 insertions, 0 deletions
diff --git a/src/migration-scripts/interfaces/18-to-19 b/src/migration-scripts/interfaces/18-to-19
new file mode 100644
index 0000000..ae1a07a
--- /dev/null
+++ b/src/migration-scripts/interfaces/18-to-19
@@ -0,0 +1,86 @@
+# Copyright 2021-2024 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# 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 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
+# Lesser General Public License for more details.
+#
+# 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/>.
+
+import os
+
+from vyos.configtree import ConfigTree
+
+def replace_nat_interfaces(config, old, new):
+    if not config.exists(['nat']):
+        return
+    for direction in ['destination', 'source']:
+        conf_direction = ['nat', direction, 'rule']
+        if not config.exists(conf_direction):
+            return
+        for rule in config.list_nodes(conf_direction):
+            conf_rule = conf_direction + [rule]
+            if config.exists(conf_rule + ['inbound-interface']):
+                tmp = config.return_value(conf_rule + ['inbound-interface'])
+                if tmp == old:
+                    config.set(conf_rule + ['inbound-interface'], value=new)
+            if config.exists(conf_rule + ['outbound-interface']):
+                tmp = config.return_value(conf_rule + ['outbound-interface'])
+                if tmp == old:
+                    config.set(conf_rule + ['outbound-interface'], value=new)
+
+
+def migrate(config: ConfigTree) -> None:
+    base = ['interfaces', 'wirelessmodem']
+    if not config.exists(base):
+        # Nothing to do
+        return
+
+    new_base = ['interfaces', 'wwan']
+    config.set(new_base)
+    config.set_tag(new_base)
+    for old_interface in config.list_nodes(base):
+        # convert usb0b1.3p1.2 device identifier and extract 1.3 usb bus id
+        usb = config.return_value(base + [old_interface, 'device'])
+        device = usb.split('b')[-1]
+        busid = device.split('p')[0]
+        for new_interface in os.listdir('/sys/class/net'):
+            # we are only interested in interfaces starting with wwan
+            if not new_interface.startswith('wwan'):
+                continue
+            device = os.readlink(f'/sys/class/net/{new_interface}/device')
+            device = device.split(':')[0]
+            if busid in device:
+                config.copy(base + [old_interface], new_base + [new_interface])
+                replace_nat_interfaces(config, old_interface, new_interface)
+
+    config.delete(base)
+
+    # Now that we have copied the old wirelessmodem interfaces to wwan
+    # we can start to migrate also individual config items.
+    for interface in config.list_nodes(new_base):
+        # we do no longer need the USB device name
+        config.delete(new_base + [interface, 'device'])
+        # set/unset DNS configuration
+        dns = new_base + [interface, 'no-peer-dns']
+        if config.exists(dns):
+            config.delete(dns)
+        else:
+            config.set(['system', 'name-servers-dhcp'], value=interface, replace=False)
+
+        # Backup distance is now handled by DHCP option "default-route-distance"
+        distance = dns = new_base + [interface, 'backup', 'distance']
+        old_default_distance = '10'
+        if config.exists(distance):
+            old_default_distance = config.return_value(distance)
+            config.delete(distance)
+        config.set(new_base + [interface, 'dhcp-options', 'default-route-distance'], value=old_default_distance)
+
+        # the new wwan interface use regular IP addressing
+        config.set(new_base + [interface, 'address'], value='dhcp')