edit README.md, add 99-captive-portal

99-captive-portal

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+# Konfiguration
+LOG_FILE="/var/log/nm-captive.log"
+
+# Log-Funktion
+log() {
+    echo "$(date '+%Y-%m-%d %H:%M:%S') - $1" >> "$LOG_FILE"
+}
+
+check_captive_portal() {
+    # Teste mit Google's Connectivity Check (sollte 204 zurückgeben)
+    local url="http://connectivitycheck.gstatic.com/generate_204"
+    local http_code=$(curl -s -o /dev/null -w "%{http_code}" --connect-timeout 5 "$url")
+    
+    if [ $? -ne 0 ]; then
+        log "Network error - captive portal likely"
+        return 1
+    fi
+    
+    if [ "$http_code" = "204" ]; then
+        log "Connectivity check passed (204) - no captive portal"
+        return 0
+    else
+        log "Connectivity check failed (HTTP $http_code) - captive portal detected"
+        return 1
+    fi
+}
+
+log "=== Dispatch triggered: $1 $2 ==="
+
+if [[ "$1" == wl* ]] && [ "$2" = "up" ]; then
+    sleep 3
+    
+    if ! check_captive_portal; then
+        log "CAPTIVE PORTAL DETECTED! Opening browser..."
+        
+        # Finde Benutzer und starte Firefox
+        local_user=$(who | grep "(:0)" | awk '{print $1}' | head -n1)
+        if [ -n "$local_user" ]; then
+            export DISPLAY=:0
+            export XAUTHORITY=/home/$local_user/.Xauthority
+            
+            # Starte Firefox im Hintergrund
+            sudo -u $local_user env DISPLAY=:0 XAUTHORITY=/home/$local_user/.Xauthority \
+                firefox --new-window "http://captive.apple.com" &
+            log "Firefox started for user $local_user"
+        fi
+    else
+        log "No captive portal detected"
+    fi
+fi
+
+log "=== Completed ==="