prometheus-node-exporter-lua: check if status is nil before processing wifi device metrics interfaces

Signed-off-by: Jun Ouyang <ouyangjun1999@gmail.com>

utils/prometheus-node-exporter-lua/Makefile

@@ -4,7 +4,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=prometheus-node-exporter-lua
-PKG_VERSION:=2026.05.09
+PKG_VERSION:=2026.05.10
 PKG_RELEASE:=1
 
 PKG_MAINTAINER:=Etienne CHAMPETIER <champetier.etienne@gmail.com>

utils/prometheus-node-exporter-lua/files/usr/lib/lua/prometheus-collectors/wifi.lua

@@ -10,6 +10,10 @@ local function scrape()
   local u = ubus.connect()
   local status = u:call("network.wireless", "status", {})
 
+  if not status then
+    return
+  end
+
   for dev, dev_table in pairs(status) do
     for _, intf in ipairs(dev_table['interfaces']) do
       local ifname = intf['ifname']

utils/prometheus-node-exporter-lua/files/usr/lib/lua/prometheus-collectors/wifi_stations.lua

@@ -23,6 +23,10 @@ local function scrape()
   local u = ubus.connect()
   local status = u:call("network.wireless", "status", {})
 
+  if not status then
+    return
+  end
+
   for dev, dev_table in pairs(status) do
     for _, intf in ipairs(dev_table['interfaces']) do
       local ifname = intf['ifname']