Fix write loop

src/sys/net/mod.rs

@@ -380,6 +380,7 @@ impl FileIO for TcpSocket {
  fn write(&mut self, buf: &[u8]) -> Result<usize, ()> {
  let timeout = 5.0;
  let started = sys::clock::realtime();
+ let mut sent = false;
  if let Some((ref mut iface, ref mut device)) = *sys::net::NET.lock() {
  let mut sockets = SOCKETS.lock();
  loop {
@@ -389,11 +390,14 @@ impl FileIO for TcpSocket {
  iface.poll(time(), device, &mut sockets);
  let socket = sockets.get_mut::<tcp::Socket>(self.handle);
 
+ if sent {
+ break;
+ }
  if socket.can_send() {
  if socket.send_slice(buf.as_ref()).is_err() {
  return Err(());
  }
- break;
+ sent = true; // Break after next poll
  }
 
  if let Some(duration) = iface.poll_delay(time(), &sockets) {