ffac-autoupdater-wifi-fallback: add improvements from tecff

see tecff/gluon-packages@779b934#diff-a9bb9dd229642ccf47f128025eae194217c69ca530ac029c5decd604557fe731R7

ffac-autoupdater-wifi-fallback/LICENSE

@@ -1,6 +1,6 @@
 BSD 2-Clause License
 
-Copyright (c) 2023 kb-light, Patric Steffen, Andreas Ziegler, Florian Maurer
+Copyright (c) 2024 kb-light, Patric Steffen, Andreas Ziegler, Florian Maurer, Maximilian Baumgartner
 
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:

ffac-autoupdater-wifi-fallback/Makefile

@@ -1,9 +1,9 @@
-# SPDX-FileCopyrightText: 2023 kb-light, Patric Steffen, Andreas Ziegler, Florian Maurer
+# SPDX-FileCopyrightText: 2024 kb-light, Patric Steffen, Andreas Ziegler, Florian Maurer, Maximilian Baumgartner
 # SPDX-License-Identifier: BSD-2-Clause
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ffac-autoupdater-wifi-fallback
-PKG_VERSION:=2
+PKG_VERSION:=3
 PKG_LICENSE:=BSD-2-Clause
 
 PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
@@ -13,7 +13,7 @@ include $(TOPDIR)/../package/gluon.mk
 
 define Package/$(PKG_NAME)
   TITLE:=Implements switching to fallback mode if we are cut off from the mesh
-  DEPENDS:=+gluon-autoupdater +gluon-site +gluon-state-check +iw +libgluonutil +libiwinfo-lua +luabitop +luaposix +micrond +wpa-supplicant-mini
+  DEPENDS:=+gluon-autoupdater +gluon-site +gluon-state-check +iw +libgluonutil +libiwinfo-lua +libubus-lua +luabitop +luaposix +micrond
   MAINTAINER:=Freifunk Aachen <[email protected]>
 endef
 

ffac-autoupdater-wifi-fallback/luasrc/usr/sbin/autoupdater-wifi-fallback

@@ -5,6 +5,8 @@ local util = require 'gluon.util'
 local bit = require 'bit'
 local fcntl = require 'posix.fcntl'
 local unistd = require 'posix.unistd'
+local ubus = require('ubus').connect()
+local wireless = require 'gluon.wireless'
 
 local configname = 'autoupdater-wifi-fallback'
 local lockfilename = '/var/lock/' .. configname .. '.lock'
@@ -95,30 +97,22 @@ end
 
 local function switch_to_fallback_mode(radio, ssid, bssid)
   autil.log('out', 'connecting to '  .. radio .. ' ' .. ssid .. ' ' .. bssid)
-  uci:delete_all('wireless', 'wifi-iface')
-  uci:section('wireless', 'wifi-iface', 'fallback', {
-    device = radio,
-    network = 'fallback',
-    mode = 'sta',
-    disabled = false,
-    macaddr = util.generate_mac(3, 10),
-    bssid = bssid,
-    ssid = ssid,
-    ifname = 'fallback',
-    encryption = 'none',
-  })
-  uci:set('wireless', radio, 'disabled', false)
-  uci:save('wireless')
-
-  os.execute('wifi')
-  os.execute('sleep 5')
-  uci:revert('wireless')
+	os.execute('sleep 2')
+	ubus:call('network', 'add_dynamic', {name = "fallback", ifname = "fallback", proto = "dhcp", device = "fallback", l3_device = "fallback"})
+	ubus:call('network', 'add_dynamic', {name = "fallback6", ifname = "fallback", proto = "dhcpv6", device = "fallback", l3_device = "fallback"})
+	ubus:call('network.interface.fallback', 'add_device', {name = "fallback"})
+	ubus:call('network.interface.fallback6', 'add_device', {name = "fallback"})
+	ubus:call('network.interface.fallback', 'up', {})
+	ubus:call('network.interface.fallback6', 'up', {})
+	os.execute('sleep 2')
+	os.execute('iw dev fallback connect ' .. ssid .. ' ' .. bssid)
   os.execute('sleep 20')
 end
 
 local function revert_to_standard_mode()
   autil.log('out', 'going back to standard mode')
-  os.execute('/etc/init.d/network restart')
+	os.execute('/etc/init.d/wpad start')
+	os.execute('wifi up')
   os.execute('sleep 30')
 end
 
@@ -142,19 +136,32 @@ if (force or preflight_check()) and not connectivity_check() then
 
   if force or tonumber(unreachable_since) + offset < os.time() then
     autil.log('out', 'going to fallback mode')
+		os.execute('wifi down')
+		os.execute('/etc/init.d/wpad status >/dev/null && /etc/init.d/wpad stop')
     for radio, netlist in pairs(autil.get_available_wifi_networks()) do
+			local radio_config = uci:get_all('wireless', radio)
+			local phy = wireless.find_phy(radio_config)
+			autil.log('out', 'using ' .. phy .. ' to create fallback interface')
+			os.execute('iw phy ' .. phy .. ' interface add fallback type managed')
+			os.execute('ip link set dev fallback up')
       for _, net in ipairs(netlist) do
         switch_to_fallback_mode(radio, net.ssid, net.bssid)
         if run_autoupdater() == 0 then
           break
         end
+				ubus:call('network.interface.fallback', 'down', {})
+				ubus:call('network.interface.fallback', 'remove', {})
+				ubus:call('network.interface.fallback6', 'down', {})
+				ubus:call('network.interface.fallback6', 'remove', {})
+				os.execute('iw dev fallback disconnect')
       end
+			os.execute('iw dev fallback del')
     end
-    -- this is only reached if no updated happened
+		-- this is only reached if no update happened
     revert_to_standard_mode()
   end
 else
   uci:delete(configname, 'settings', 'unreachable_since')
   uci:delete(configname, 'settings', 'last_run')
   uci:save(configname)
-end
+end