diff --git a/src/algo_naive.c b/src/algo_naive.c
index 1957230..1b1b7bb 100644
--- a/src/algo_naive.c
+++ b/src/algo_naive.c
@@ -171,6 +171,7 @@ void on_tcp_read(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
     mv_buffer_wtor (app_ctx, fdinfo, bp);
     return;
   }
+  printf("Pass packet from %s to %s\n", fdinfo->url, url);
 
   // 4. We move the buffer and notify the target
   mv_buffer_rtow (app_ctx, fdinfo, to_fdinfo, bp);
@@ -232,6 +233,7 @@ void on_udp_read(struct evt_core_ctx* ctx, struct evt_core_fdinfo* fdinfo) {
     mv_buffer_wtor (app_ctx, fdinfo, bp);
     return;
   }
+  printf("Pass packet from %s to %s\n", fdinfo->url, url);
 
   // 4. We move the buffer and notify the target
   mv_buffer_rtow (app_ctx, fdinfo, to_fdinfo, bp);