Logic at adding targets to the FuturesUnordered rolled back to the in…

…itial.

In case of batchsize higher than all sockets to scan, we could end up in an infinite loop. Fixed with breaking out of the loop if that's the case.

src/scanner/mod.rs

@@ -60,18 +60,19 @@ impl Scanner {
  }
  }
 
- while ftrs.len() <= self.batch_size as usize {
+ while ftrs.len() < self.batch_size as usize {
  if !targets.is_empty() {
  ftrs.push(self.scan_socket(targets.pop_front().unwrap()));
+ } else {
+ break;
  }
  }
 
  loop {
  match ftrs.next().await {
  Some(result) => {
- match result {
- Ok(socket) => open_sockets.push(socket),
- Err(_) => {}
+ if let Ok(socket) = result {
+ open_sockets.push(socket);
  }
  if !targets.is_empty() {
  ftrs.push(self.scan_socket(targets.pop_front().unwrap()));