fixed potential tcp errors that may occur when packets are split

src/main.rs

@@ -187,7 +187,14 @@ async fn process_client(socket: TcpStream, udp_socket: Rc<RefCell<UdpSocket>>, c
 
 async fn read_timeout(mut socket: &TcpStream, buf: &mut [u8], duration: u64) -> Result<usize,Box<dyn Error>> {
 
-    match future::timeout(Duration::from_millis(duration), socket.read(buf)).await {
+    //this is a read exact function.  The buffer passed should be the exact size wanted
+
+    let num_to_read = buf.len();
+    
+    let mut num_read = 0;
+
+    while num_read < num_to_read {
+        match future::timeout(Duration::from_millis(duration), socket.read(&mut buf[num_read..])).await {
             Ok(r) => {
                 match r {
 
@@ -197,7 +204,7 @@ async fn read_timeout(mut socket: &TcpStream, buf: &mut [u8], duration: u64) ->
 
                     },
                     Ok(n) => {
-                    return Ok(n);
+                        num_read += n;
                     }, 
                     Err(e) => {return Err(format!("{}", e.to_string()))?}
                 }
@@ -207,6 +214,9 @@ async fn read_timeout(mut socket: &TcpStream, buf: &mut [u8], duration: u64) ->
             Err(e) => {return Err(format!("{}", e.to_string()))?}
 
         }
+    }
+
+    return Ok(num_read);
 
 }