jscanner

commit 666991a4f3624f9caa0c9e1ada6dc3b191f914a6
parent 8a76155151d767740572403ab9a94f85376d3d00
Author: Matthias Jaros <jaros@mailbox.org>
Date:   Wed,  1 Jul 2026 13:45:41 +0200

Fixed port parsing logic

Diffstat:
M
src/main/java/com/it_jaros/jscanner/PortRange.java
 | 
63
+++++++++++++++++++++++++++++++++++++++------------------------

1 file changed, 39 insertions(+), 24 deletions(-)
diff --git a/src/main/java/com/it_jaros/jscanner/PortRange.java b/src/main/java/com/it_jaros/jscanner/PortRange.java
@@ -10,37 +10,51 @@ public class PortRange {
     private final BitSet specifiedPorts = new BitSet(MAX_PORT);
     private final BitSet availablePorts = new BitSet(MAX_PORT);
 
-    private int cursor;
+    private int currentPortCursor;
     private int done = 0;
 
     public PortRange(String ports) {
         if (ports == null || "".equals(ports)) {
-            // keep defaults
-            specifiedPorts.set(1, 1024 + 1);
-            return;
+            specifiedPorts.set(MIN_PORT, 1024);
+        } else if ("all".equalsIgnoreCase(ports)) {
+            specifiedPorts.set(MIN_PORT, MAX_PORT);
+        } else {
+            parsePortRange(ports);
         }
 
+        availablePorts.or(specifiedPorts);
+        currentPortCursor = availablePorts.nextSetBit(MIN_PORT);
+    }
+
+    /**
+     * Possible values are 1,10 or 1-10 or a mix of 1,5-10
+     * So we treat , stronger and handle them first and then check for -
+     *
+     * @param ports
+     */
+    private void parsePortRange(String ports) {
         String[] splitComma = ports.split(",");
         for (String commaValue : splitComma) {
-            if (commaValue.contains("-")) {
-                String[] rangeValue = commaValue.split("-");
-                if (rangeValue.length > 2) {
-                    throw new IllegalArgumentException(String.format("Argument contains too many '-'' %s", commaValue));
-                }
-
-                int start = Integer.parseInt(rangeValue[0]);
-                int end = Integer.parseInt(rangeValue[1]);
-                checkValues(start, end);
-                specifiedPorts.set(start, end + 1);
-            } else {
-                int port = Integer.parseInt(commaValue);
+            String[] rangeValue = commaValue.split("-");
+
+            // more then two values are not possible
+            if (rangeValue.length > 2) {
+                throw new IllegalArgumentException(String.format("Argument contains too many '-'' %s", commaValue));
+            }
+
+            // no range given, only single port
+            int port = Integer.parseInt(rangeValue[0]);
+            if (rangeValue.length == 1) {
                 checkValue(port);
-                specifiedPorts.set(Integer.parseInt(commaValue));
+                specifiedPorts.set(port);
+                continue;
             }
-        }
 
-        availablePorts.or(specifiedPorts);
-        cursor = availablePorts.nextSetBit(MIN_PORT);
+            // range given
+            int end = Integer.parseInt(rangeValue[1]);
+            checkValues(port, end);
+            specifiedPorts.set(port, end + 1);
+        }
     }
 
     private void checkValues(int start, int end) {
@@ -66,10 +80,10 @@ public class PortRange {
     }
 
     public int next() {
-        int p = availablePorts.nextSetBit(cursor);
+        int p = availablePorts.nextSetBit(currentPortCursor);
         if (p > 0) {
             availablePorts.clear(p);
-            cursor = p + 1;
+            currentPortCursor = p + 1;
             done++;
             return p;
         }
@@ -78,7 +92,7 @@ public class PortRange {
     }
 
     public boolean hasNext() {
-        return availablePorts.nextSetBit(cursor) > 0;
+        return availablePorts.nextSetBit(currentPortCursor) > 0;
     }
 
     public int getTotal() {
@@ -88,4 +102,4 @@ public class PortRange {
     public int getDone() {
         return done;
     }
-}
+}
+\ No newline at end of file