commit eec831c5605c3becf321793146d0288420218e00
Author: fliegerjohn <fliegerjohn@posteo.de>
Date:   Tue Aug 22 17:24:54 2023 +0200

    Initial commit.

diff --git a/checkconnection.sh b/checkconnection.sh
new file mode 100755
index 0000000..bb6e3c9
--- /dev/null
+++ b/checkconnection.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+#
+## Variables
+#
+
+# Testsites should return HTTP-Code "204" 
+testsite1=https://datenkastl.de/.connectivity-check
+testsite2=http://captiveportal.kuketz.de
+
+# Testdomains for ping
+testdomain1=datenkastl.de
+testdomain2=metager.de
+
+#Path of curl and ping
+curlbin=`type -tp curl`
+pingbin=`type -tp ping`
+
+#
+## Functions
+#
+
+# Check connetction with curl
+testwithcurl() {
+	echo "Testing with curl..."
+
+	status=$(curl --write-out "%{http_code}\n" "$testsite1" --output output.txt --silent)
+	if [[ "$status" = "204" ]]; then
+		echo "The connection is up!"
+	
+	else
+
+		status2=$(curl --write-out "%{http_code}\n" "$testsite2" --output output.txt --silent)
+		if [[ "$status2" = "204" ]]; then		
+			echo "The network is up, but $testsite1 is down."
+	
+		else
+			echo "The network is down."
+		fi
+	fi
+}
+
+#Check connection with ping
+testwithping() {
+	echo "Testing with ping..."
+	if ping -q -c 1 -W 1 $testdomain1 >/dev/null; then
+		echo "The connection is up."
+	
+	elif ping -q -c 1 -W 1 $testdomain2 >/dev/null; then
+		echo "The network is up, but $testdomain1 is down."
+
+	else
+		echo "The network is down."
+
+	fi
+}
+
+#
+## Main
+#
+
+# Check for curl and ping and check network
+
+if [[ -x ${curlbin} ]]; then
+	testwithcurl
+
+elif [[ -x ${pingbin} ]]; then
+	testwithping
+
+else
+	echo "Can't find curl or ping. Please install one of them."
+	exit 1
+fi
+
+
diff --git a/output.txt b/output.txt
new file mode 100644
index 0000000..e69de29