From cbf08c1560c18bede155efc6b3a6a501a338661e Mon Sep 17 00:00:00 2001
From: Matthias Jaros <jarlucmat@mailbox.org>
Date: Fri, 23 Jan 2026 22:14:59 +0100
Subject: Added cli parser

---
 src/main/java/com/it_jaros/networkScanner/App.java | 49 +++++++++++-----------
 1 file changed, 24 insertions(+), 25 deletions(-)

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

diff --git a/src/main/java/com/it_jaros/networkScanner/App.java b/src/main/java/com/it_jaros/networkScanner/App.java
index f173e18..49b50c0 100644
--- a/src/main/java/com/it_jaros/networkScanner/App.java
+++ b/src/main/java/com/it_jaros/networkScanner/App.java
@@ -4,39 +4,38 @@ import java.util.List;
 
 public class App {
     public static void main(String[] args) {
-        Scanner scanner = new Scanner();
-        if (args.length < 1 || args[0] == "") {
+        try {
+            ScanTarget target = (new CliParser()).parseArgs(args);
+            Scanner scanner = new Scanner();
+            List<Integer> openPorts = scanner.scanPorts(target);
+            printResults(target, openPorts);
+        } catch (IllegalArgumentException e) {
+            System.out.println(e.getMessage());
             usageAndExit();
-        }
-        String target = args[0];
-        System.out.printf(
-                "Scanning host=%s \n",
-                target);
-
-        try (FdCounter fd = new FdCounter()) {
-            fd.start(20); // sample every 20ms
-            List<Integer> openPorts = scanner.scanPorts(target, 10000);
-            printPorts(target, openPorts);
-            System.out.println("FD baseline: " + fd.baseline());
-            System.out.println("FD limit: " + fd.maxFds());
-            System.out.println("Peak open FDs during scan: " + fd.peakOpenFds());
+        } catch (Exception e) {
+            System.err.println("Something went wrong");
         }
     }
 
-    public static void printPorts(String address, List<Integer> openPorts) {
-        System.out.println("Address:" + address);
-        openPorts.forEach((p) -> System.out.println("Open port: " + p));
+    public static void printResults(ScanTarget address, List<Integer> openPorts) {
+        System.out.println("Target: " + address.address());
+        System.out.print("Ports:");
+        openPorts.forEach((p) -> System.out.print(" " + p));
     }
 
-    private static void usageAndExit() {
+    public static void usageAndExit() {
         System.err.println("""
-            Usage:
-              java -jar scanner.jar <host> 
+                Usage:
+                    java -jar scanner.jar [OPTIONS] <host>
+
+                Options:
+                    --delay: Waiting period in between connection attempts for a host
+                    --connLimit: Socket Connection limit for a host
 
-            Examples:
-              java -jar scanner.jar localhost
-              java -jar scanner.jar fd00::1 
-            """);
+                Examples:
+                    java -jar scanner.jar localhost
+                    java -jar scanner.jar fd00::1
+                """);
         System.exit(1);
     }
 }
-- 
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