diff --git a/hptp-send/src/main.rs b/hptp-send/src/main.rs
index 4c2f808..95cfe39 100644
--- a/hptp-send/src/main.rs
+++ b/hptp-send/src/main.rs
@@ -65,11 +65,25 @@ fn parse_args(mut args: impl Iterator<Item = String>) -> Result<SocketAddrV4, Er
 }
 
 async fn upload(
-    _log: &mut Logger,
+    log: &mut Logger,
     mut sock: tokio::net::UdpSocket,
     targ_addr: SocketAddrV4,
 ) -> Result<(), Error> {
-    sock.send_to("Hello, ".as_bytes(), targ_addr).await?;
-    sock.send_to("world!".as_bytes(), targ_addr).await?;
+    let contents: String = (0..100).flat_map(|_| "Hello world ".chars()).collect();
+
+    for i in 0.. {
+        let (idx, part) = {
+            let width = 50;
+            let lo = i * width;
+            let hi = std::cmp::min((i + 1) * width, contents.len());
+            if lo >= contents.len() {
+                break;
+            };
+            (lo, &contents[lo..hi])
+        };
+        sock.send_to(part.as_bytes(), targ_addr).await?;
+        log.send_data(idx, part.len()).await;
+    }
+
     Ok(())
 }