add fragments to v0 outgoing packets

prudpv0/src/server.rs

@@ -106,17 +106,21 @@ impl<C: Crypto> Server<C> {
                     .expect("packet malformed in creation"),
             );*/
         let mut inner = conn.inner.lock().await;
+        let pieces = data.chunks(1000);
+        let max_piece = pieces.len() - 1;
+        let mut frag_num = 1;
+        for (i, piece) in pieces.enumerate() {
             let seq = inner.server_packet_counter;
             let packet = new_data_packet(
                 NEED_ACK | RELIABLE,
-            self.param.virtual_port,
+                (&self).param.virtual_port,
                 conn.addr.virtual_port,
-            data,
+                piece,
                 inner.server_packet_counter,
                 conn.session_id,
-            0,
+                if i == max_piece { 0 } else { frag_num },
                 &mut inner.crypto_instance,
-            &self.crypto,
+                &(&self).crypto,
             );
             inner.server_packet_counter += 1;
 
@@ -125,8 +129,6 @@ impl<C: Crypto> Server<C> {
 
             inner.unacknowledged_packets.insert(seq, packet);
 
-        drop(inner);
-
             let conn = Arc::downgrade(&conn);
             let this = Arc::downgrade(&self);
 
@@ -150,6 +152,9 @@ impl<C: Crypto> Server<C> {
                     break;
                 }
             });
+            frag_num += 1;
+        }
+        drop(inner);
     }
     async fn connection_thread(
         self: Arc<Self>,