Added a profound error message in case DNS servers could not bind.

src/dns/server.rs

@@ -181,7 +181,8 @@ impl DnsServer for DnsUdpServer {
     /// This method takes ownership of the server, preventing the method from being called multiple times.
     fn run_server(self) -> Result<()> {
         // Bind the socket
-        let socket = UdpSocket::bind(self.context.dns_listen.as_str())?;
+        let socket = UdpSocket::bind(self.context.dns_listen.as_str())
+            .expect(&format!("Cannot start DNS server on {}! Change listen address in config!", self.context.dns_listen.as_str()));
 
         // Spawn threads for handling requests
         for thread_id in 0..self.thread_count {
@@ -302,7 +303,8 @@ impl DnsTcpServer {
 
 impl DnsServer for DnsTcpServer {
     fn run_server(mut self) -> Result<()> {
-        let socket = TcpListener::bind(self.context.dns_listen.as_str())?;
+        let socket = TcpListener::bind(self.context.dns_listen.as_str())
+            .expect(&format!("Cannot start DNS server on {}! Change listen address in config!", self.context.dns_listen.as_str()));
 
         // Spawn threads for handling requests, and create the channels
         for thread_id in 0..self.thread_count {

src/main.rs

@@ -69,11 +69,10 @@ fn main() {
             if let Some(settings) = Settings::load(&path) {
                 let string = toml::to_string(&settings).unwrap();
                 println!("{}", &string);
-                return;
             } else {
                 println!("Error loading config for upgrade!");
-                return;
             }
+            return;
         }
     };