From 7946b8aae3427b180d28441f8a02ae6665ac215c Mon Sep 17 00:00:00 2001
From: Matthias Jaros <jarlucmat@mailbox.org>
Date: Mon, 16 Mar 2026 16:41:25 +0100
Subject: Renamed package

---
 .../java/com/it_jaros/networkScanner/Scanner.java  | 148 ---------------------
 1 file changed, 148 deletions(-)
 delete mode 100644 src/main/java/com/it_jaros/networkScanner/Scanner.java

(limited to 'src/main/java/com/it_jaros/networkScanner/Scanner.java')

diff --git a/src/main/java/com/it_jaros/networkScanner/Scanner.java b/src/main/java/com/it_jaros/networkScanner/Scanner.java
deleted file mode 100644
index e3f90f1..0000000
--- a/src/main/java/com/it_jaros/networkScanner/Scanner.java
+++ /dev/null
@@ -1,148 +0,0 @@
-package com.it_jaros.networkScanner;
-
-import java.io.IOException;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-import java.net.SocketException;
-import java.net.SocketTimeoutException;
-import java.util.ArrayList;
-import java.util.BitSet;
-import java.util.List;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
-import java.util.concurrent.Semaphore;
-import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.atomic.AtomicLong;
-import java.util.concurrent.locks.LockSupport;
-
-public class Scanner {
-
-    private final Counter counter = new Counter();
-    private final ProgressBar progressBar = new ProgressBar();
-    private final Semaphore socketLimit;
-    private final int timeoutInMillis;
-    private final long delayInNanos;
-    private final int maxWorkersPerHost;
-
-    public Scanner(int socketLimit, int timeoutInMillis, int delayInMillis, int maxWorkersPerHost) {
-        this.timeoutInMillis = timeoutInMillis;
-        this.delayInNanos = TimeUnit.MILLISECONDS.toNanos(Math.max(0, delayInMillis));
-        this.socketLimit = new Semaphore(socketLimit);
-        this.maxWorkersPerHost = maxWorkersPerHost;
-    }
-
-    public List<ScanResult> scan(ScanOptions target) {
-        return scanTargets(target.targets(), target.ports());
-    }
-
-    public List<ScanResult> scanTargets(List<String> targets, String ports) {
-        List<ScanResult> results = new ArrayList<>();
-        progressBar.start();
-        try (ExecutorService executor = Executors.newVirtualThreadPerTaskExecutor()) {
-            List<Future<ScanResult>> futures = new ArrayList<>();
-            for (String target : targets) {
-                futures.add(executor.submit(() -> scanTarget(target, ports)));
-            }
-
-            futures.forEach((Future<ScanResult> f) -> {
-                try {
-                    results.add(f.get());
-                } catch (InterruptedException e) {
-                    Thread.currentThread().interrupt();
-                } catch (ExecutionException e) {
-                    System.out.printf("%s -> %s%n", e.getClass().getSimpleName(), e.getMessage());
-                }
-            });
-        }
-
-        progressBar.stop();
-        System.out.println("Peak concurrent connects: " + counter.max());
-        return results;
-    }
-
-    private ScanResult scanTarget(String target, String ports) {
-        PortRange portRange = new PortRange(ports);
-        AtomicLong portSlotFactory = new AtomicLong(System.nanoTime());
-        Semaphore maxWorkers = new Semaphore(maxWorkersPerHost);
-        BitSet openPorts = new BitSet(PortRange.MAX_PORT);
-
-        Progress progress = new Progress(target, portRange.getTotal(), new AtomicInteger(), new AtomicInteger());
-        progressBar.submit(progress);
-
-        try (ExecutorService executor = Executors.newVirtualThreadPerTaskExecutor()) {
-            List<Future<Integer>> futures = new ArrayList<>();
-            while (portRange.hasNext()) {
-                maxWorkers.acquireUninterruptibly();
-                final int currentPort = portRange.next();
-                futures.add(executor.submit(() -> {
-                    try {
-                        waitForSlot(portSlotFactory);
-                        int port = scanPort(target, currentPort);
-                        if (port != -1) {
-                            progress.open().incrementAndGet();
-                        }
-                        return port;
-                    } finally {
-                        maxWorkers.release();
-                        progress.done().incrementAndGet();
-                    }
-                }));
-            }
-
-            List<Throwable> errors = new ArrayList<>();
-            for (Future<Integer> f : futures) {
-                try {
-                    int port = f.get();
-                    if (port != -1) {
-                        // openPorts is not threadsafe, so we do not update it outside the worker threads
-                        openPorts.set(port);
-                    }
-                } catch (InterruptedException e) {
-                    Thread.currentThread().interrupt();
-                } catch (ExecutionException e) {
-                    errors.add(e);
-                }
-            }
-
-            if (!errors.isEmpty()) {
-                System.out.printf("Errors happened during scan of target %s%nErrors:%s -> %s", target, errors.size(), errors);
-            }
-        }
-
-        return new ScanResult(target, openPorts);
-    }
-
-    private int scanPort(String target, final int currentPort) {
-        return isTargetPortOpen(target, currentPort) ? currentPort : -1;
-    }
-
-    private void waitForSlot(AtomicLong scanSlotFactory) {
-        if (delayInNanos > 0) {
-            long slot = scanSlotFactory.getAndAdd(delayInNanos);
-            long wait = slot - System.nanoTime();
-            if (wait > 0)
-                LockSupport.parkNanos(wait);
-        }
-    }
-
-    private boolean isTargetPortOpen(String target, int port) {
-        socketLimit.acquireUninterruptibly();
-        counter.inc();
-        try (Socket socket = new Socket()) {
-            socket.connect(new InetSocketAddress(target, port), timeoutInMillis);
-            return true;
-        } catch (SocketException | SocketTimeoutException ignored) {
-            // Will happen a lot when scanning for open ports, so not needed
-        } catch (IOException e) {
-            System.out.printf("%s -> %s", e.getClass().getSimpleName(), e.getMessage());
-        } finally {
-            counter.dec();
-            socketLimit.release();
-        }
-
-        return false;
-    }
-}
-- 
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