Banana-Coding.com - Java Knuddels Emulator

Quellcode

package kreverse.kremu;

import java.util.ArrayList;

/**
 *
 * @author Flav
 */
public class ModuleTree {
	private String tree;
	private int version;
	private byte startIndex;
	private ArrayList<String> modules;

	public ModuleTree(String tree) {
		this.tree = tree;
		String[] mdls = tree.split(";");
		version = Integer.parseInt(mdls[0]);
		startIndex = Byte.parseByte(mdls[1]);
		modules = new ArrayList<String>();

		for (int i = 2; i < mdls.length; i++) {
			modules.add(mdls[i]);
		}
	}

	public String getTree() {
		return tree;
	}

	public int getVersion() {
		return version;
	}

	public String getModule(int index) {
		return modules.get(index - startIndex);
	}

	public int getIndex(String module) {
		for (int i = 0; i < modules.size(); i++) {
			if (modules.get(i).equals(module)) {
				return i + startIndex;
			}
		}

		return -1;
	}
}

Quellcode

package kreverse.kremu.handler;

import kreverse.kremu.Client;
import kreverse.kremu.Server;
import kreverse.kremu.tools.packet.PacketCreator;
import kreverse.kremu.tools.packet.PacketReader;

/**
 *
 * @author Flav
 */
public class ModuleHandler {
	private static String protocolConfirmed;
	private static String changeProtocol;

	static {
		protocolConfirmed = PacketCreator.protocolConfirmed();
		changeProtocol = PacketCreator.changeProtocol();
	}

	public static void handle(PacketReader reader, Client client) {
		String module = Server.get().getModuleTree().getModule(reader.readShort());

		if (module.equals("CONFIRM_PROTOCOL_HASH")) {
			reader.readInt();
			int version = reader.readInt();

			if (Server.get().getModuleTree().getVersion() == version) {
				client.send(protocolConfirmed);
			} else {
				client.send(changeProtocol);
			}
		}
	}
}

Quellcode

package kreverse.kremu.tools.packet;

/**
 *
 * @author Flav
 */
public class PacketReader {
	private String buffer;

	public PacketReader(String buffer) {
		this.buffer = buffer;
	}

	public byte read() {
		byte v = (byte) buffer.charAt(0);
		buffer = buffer.substring(1);
		return v;
	}

	public boolean readBoolean() {
		return read() != 0;
	}

	public short readShort() {
		return (short) (((read() & 0xFF) << 8)
				+ (read() & 0xFF));
	}

	public int readInt() {
		return ((read() & 0xFF) << 24)
				+ ((read() & 0xFF) << 16)
				+ ((read() & 0xFF) << 8)
				+ (read() & 0xFF);
	}

	public String readString(int len) {
		String v = buffer.substring(0, len);
		buffer = buffer.substring(len);
		return v;
	}
}

Quellcode

package kreverse.kremu.tools.packet;

/**
 *
 * @author Flav
 */
public class PacketWriter {
	private StringBuilder buffer;

	public PacketWriter() {
		buffer = new StringBuilder();
	}

	public void write(int v) {
		buffer.append((char) v);
	}

	public void writeBoolean(boolean v) {
		write(v ? 1 : 0);
	}

	public void writeShort(int v) {
		write(v >> 8);
		write(v);
	}

	public void writeInt(int v) {
		write(v >> 24);
		write(v >> 16);
		write(v >> 8);
		write(v);
	}

	public void writeString(String v) {
		buffer.append(v);
	}

	public String toString() {
		return buffer.toString();
	}
}

Quellcode

[...]

	public static String protocolConfirmed() {
		PacketWriter packet = new PacketWriter();
		packet.writeString(SendOpcode.MODULE.getValue());
		packet.write(0x00);
		packet.writeShort(Server.get().getModuleTree().getIndex("PROTOCOL_CONFIRMED"));
		return packet.toString();
	}

	public static String changeProtocol() {
		PacketWriter packet = new PacketWriter();
		packet.writeString(SendOpcode.MODULE.getValue());
		packet.write(0x00);
		packet.writeShort(Server.get().getModuleTree().getIndex("CHANGE_PROTOCOL"));
		packet.writeShort(Server.get().getModuleTree().getTree().length());
		packet.writeString(Server.get().getModuleTree().getTree());
		return packet.toString();
	}

[...]

Quellcode

[...]

else if (opcode.equals(ReceiveOpcode.MODULE.getValue())) {
							packet = packet.substring(2);
							PacketReader reader = new PacketReader(packet);
							ModuleHandler.handle(reader, this);
						}

[...]

Quellcode

	public static String privateChat(String channel, String nickname) {
		PacketWriter packet = new PacketWriter();
		packet.writeString(SendOpcode.MODULE.getValue());
		packet.write(0x00);
		packet.writeShort(Server.get().getModuleTree().getIndex("CLIENT_PP"));
		packet.write(channel.length());
		packet.writeString(channel);
		packet.write(nickname.length());
		packet.writeString(nickname);
		packet.write(0xFF);
		return packet.toString();
	}