added mullvad reconnect on dns failure script

.scripts/network_utilities.sh

@@ -0,0 +1,33 @@
+# network utility functions
+
+# get the ip address of the host
+function get_local_ip() {
+		echo -e "The interfaces and IPs are:\n$(ip -o -4 addr show | awk '/inet 192.168|inet 10.|inet 172.16/ {split($4, a, "/"); print $2 ": " a[1] "\n"}')"
+}
+
+function get_public_ip() {
+		public_ip=$(curl -s canhazip.com)
+		echo -e "The public IP is: $public_ip"
+}
+
+function is_dns_working() {
+		dns_working=$(ping -c 1 google.com | grep "1 received" | wc -l)
+		if [ $dns_working -eq 1 ]; then
+				return 0
+		else
+				return 1
+		fi
+
+}
+
+
+function reconnect_vpn_on_dns_failure() {
+		# reconnect vpn if dns is not working
+		if ! is_dns_working; then
+				echo "DNS is not working, reconnecting VPN"
+				mullvad reconnect
+		else
+				echo "DNS is working, no need to reconnect VPN"
+		fi
+}
+