new fritzbox config; restart implementation

config/fb.conf

@@ -1,6 +1,6 @@
-IPSec gateway vpnd.tbsgl.xyz
+IPSec gateway vpn_tannenstrasse.tbsgl.xyz
 IPSec ID rpi_vpn
-IPSec secret 1fUnV3vLS5vAbPFS
+IPSec secret PqWj8OIA87N5QWCi
 IKE Authmode psk
 Xauth username rpi_vpn
 Xauth password Dac0s0.

scripts/check_vpn.sh

@@ -1,26 +1,49 @@
 #!/bin/sh
 
-LOG_FILE=/var/log/vpn_check.log
-now=$(date)
+# Configuration
+LOG_FILE="/var/log/vpn_check.log"
+VPN_SERVICE="vpnc@fb"
+ROUTER_IP="192.168.178.1"
+VPN_CHECK_URL="https://tbsgl.xyz/vpn"
+RESTART_CHECK_URL="https://tbsgl.xyz/restart"
 
+# Log function
+log() {
+    now=$(date)
+    echo "${now} - $1" | tee -a ${LOG_FILE}
+}
 
-echo "${now} - Running Check" | tee -a ${LOG_FILE}
+# Check URL function
+check_url() {
+    curl -sI $1 | grep "HTTP/2 200" > /dev/null
+    return $?
+}
+
+# Check VPN Connectivity
+check_vpn_connectivity() {
+    ping -c 1 ${ROUTER_IP} | grep "64 bytes from" > /dev/null
+    if [ $? != 0 ]; then
+        systemctl restart ${VPN_SERVICE} > /dev/null
+        log "Ping not successful - Restarting VPN"
+    else
+        log "Ping reached router, doing nothing"
+    fi
+}
+
+# Main
+log "Running Check"
 
-curl -sI https://tbsgl.xyz/vpn | grep "HTTP/2 200" | grep -v grep > /dev/null
 # Check if VPN-On Flag is set
-if [ $? = 0 ]
-	then
-	ping -c 1 192.168.178.1 | grep "64 bytes from" | grep -v grep > /dev/null
-	# Check if VPN is already connected
-	if [ $? != 0 ]
-		then
-		# If not, then Restart VPN
-		systemctl restart vpnc@fb > /dev/null
-		echo "Ping not successful - Restarting VPN\n" | tee -a ${LOG_FILE}
-	else
-		echo "Ping reached router, doing nothing\n" | tee -a ${LOG_FILE}
-	fi
+if check_url ${VPN_CHECK_URL}; then
+    check_vpn_connectivity
 else
-	systemctl stop vpnc@fb
-	echo "VPN Flag seems to be disabled or no Internet, stopping service\n" | tee -a ${LOG_FILE}
+    systemctl stop ${VPN_SERVICE}
+    log "VPN Flag seems to be disabled or no Internet, stopping service"
 fi
+
+# Additional Functionality: Check for Restart Condition
+if check_url ${RESTART_CHECK_URL}; then
+    log "Restart condition met - Restarting device"
+    reboot now
+fi
+