Made packet intercepting possible

src/main/java/com/loohp/limbo/utils/DataTypeIO.java

@@ -52,7 +52,7 @@ public class DataTypeIO {
 	
 	public static int getStringLength(String string, Charset charset) throws IOException {
 	    byte[] bytes = string.getBytes(charset);
-	    return bytes.length;
+	    return getVarIntLength(bytes.length) + bytes.length;
 	}
 	
 	public static void writeString(DataOutputStream out, String string, Charset charset) throws IOException {

src/main/java/com/loohp/limbo/utils/Pair.java

@@ -0,0 +1,40 @@
+package com.loohp.limbo.utils;
+
+import java.util.Objects;
+
+public class Pair<F, S> {
+
+    private final F first;
+    private final S second;
+
+    public Pair(F first, S second) {
+        this.first = first;
+        this.second = second;
+    }
+
+    public F getFirst() {
+        return first;
+    }
+
+    public S getSecond() {
+        return second;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        Pair<?, ?> pair = (Pair<?, ?>) o;
+        return Objects.equals(first, pair.first) && Objects.equals(second, pair.second);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(first, second);
+    }
+
+}