ask for filename

add default IP (local)

src/main.rs

@@ -45,12 +45,20 @@ fn main() {
 
     let timeout = 1;
     let mut server_ip = read_stdin("Enter server ip: ".to_string());//e.g. 213.47.107.152:1337
+    if server_ip == "" {
+        server_ip = "127.0.0.1".to_string(); //testing ip
+    }
     if server_ip.find(":").is_none() {
         server_ip.push_str(":1337"); //default port
     }
 
-
-    let filename = "data.bin";
+    let input_filename = read_stdin("Enter filename: ".to_string());//e.g. "data.bin"
+    let filename: &str;
+    if input_filename == "" {
+        filename = "data.bin"; //testing filename
+    } else {
+        filename = &input_filename;
+    }
 
     let local_addr: SocketAddr = "0.0.0.0:0".parse().expect("Failed to parse address");
     let socket = UdpSocket::bind(local_addr).expect("Failed to bind socket");