WLAN Verbindung angepasst

2026-05-28 08:00:56 +02:00
parent cb33bbf06c
commit a42b87507b
6 changed files with 103 additions and 64 deletions
@@ -0,0 +1,72 @@
+#!/bin/bash
+set -euo pipefail
+
+WIFI_IFACE="wlan0"
+KNOWN_CONNECTIONS=(
+  "4pi:4pi"
+  "eskimue.de:netplan-wlan0-eskimue.de"
+)
+FALLBACK_AP_CONN="CUNO-AP"
+SCAN_WAIT_SECONDS=10
+
+get_active_connection() {
+  nmcli -t -f GENERAL.CONNECTION device show "$WIFI_IFACE" 2>/dev/null | head -n 1 | cut -d: -f2-
+}
+
+activate_connection() {
+  local connection_name="$1"
+  nmcli --wait 15 connection up "$connection_name" ifname "$WIFI_IFACE" >/dev/null 2>&1
+}
+
+is_known_connection() {
+  local active_connection="$1"
+  local entry
+
+  for entry in "${KNOWN_CONNECTIONS[@]}"; do
+    local connection_name="${entry#*:}"
+    if [[ "$active_connection" == "$connection_name" ]]; then
+      return 0
+    fi
+  done
+
+  return 1
+}
+
+scan_for_known_connection() {
+  local visible_ssids
+  local entry
+
+  nmcli device wifi rescan ifname "$WIFI_IFACE" >/dev/null 2>&1 || true
+  sleep "$SCAN_WAIT_SECONDS"
+  visible_ssids="$(nmcli -t -f SSID device wifi list ifname "$WIFI_IFACE" 2>/dev/null || true)"
+
+  for entry in "${KNOWN_CONNECTIONS[@]}"; do
+    local ssid="${entry%%:*}"
+    local connection_name="${entry#*:}"
+    if printf '%s\n' "$visible_ssids" | grep -Fxq "$ssid"; then
+      echo "$connection_name"
+      return 0
+    fi
+  done
+
+  return 1
+}
+
+activate_initial_connection() {
+  local active_connection
+  local selected_connection
+
+  active_connection="$(get_active_connection)"
+  if is_known_connection "$active_connection"; then
+    return 0
+  fi
+
+  if selected_connection="$(scan_for_known_connection)"; then
+    activate_connection "$selected_connection"
+    return 0
+  fi
+
+  activate_connection "$FALLBACK_AP_CONN" || true
+}
+
+activate_initial_connection