wireless: T6318: move country-code to a system wide configuration

Wireless devices are subject to regulations issued by authorities. For any
given AP or router, there will most likely be no case where one wireless NIC is
located in one country and another wireless NIC in the same device is located
in another country, resulting in different regulatory domains to apply to the
same box.

Currently, wireless regulatory domains in VyOS need to be configured per-NIC:
  set interfaces wireless wlan0 country-code us

This leads to several side-effects:
* When operating multiple WiFi NICs, they all can have different regulatory
  domains configured which might offend legislation.
* Some NICs need additional entries to /etc/modprobe.d/cfg80211.conf to apply
  regulatory domain settings, such as: "options cfg80211 ieee80211_regdom=US"
  This is true for the Compex WLE600VX. This setting cannot be done
  per-interface.

Migrate the first found wireless module country-code from the wireless
interface CLI to: "system wireless country-code"

1 files changed, 57 insertions, 0 deletions

diff --git a/src/migration-scripts/interfaces/32-to-33 b/src/migration-scripts/interfaces/32-to-33
new file mode 100755
index 000000000..caf588474
--- /dev/null
+++ b/src/migration-scripts/interfaces/32-to-33
@@ -0,0 +1,57 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2024 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/>.
+#
+# T6318: WiFi country-code should be set system-wide instead of per-device
+
+from sys import argv
+from sys import exit
+from vyos.configtree import ConfigTree
+
+if len(argv) < 2:
+    print("Must specify file name!")
+    exit(1)
+
+file_name = argv[1]
+with open(file_name, 'r') as f:
+    config_file = f.read()
+
+base = ['interfaces', 'wireless']
+
+config = ConfigTree(config_file)
+if not config.exists(base):
+    # Nothing to do
+    exit(0)
+
+installed = False
+for interface in config.list_nodes(base):
+    cc_path = base + [interface, 'country-code']
+    if config.exists(cc_path):
+        tmp = config.return_value(cc_path)
+        config.delete(cc_path)
+
+        # There can be only ONE wireless country-code per device, everything
+        # else makes no sense as a WIFI router can not operate in two
+        # different countries
+        if not installed:
+            config.set(['system', 'wireless', 'country-code'], value=tmp)
+            installed = True
+
+try:
+    with open(file_name, 'w') as f:
+        f.write(config.to_string())
+except OSError as e:
+    print(f'Failed to save the modified config: {e}')
+    exit(1)