413 lines
17 KiB
Java
413 lines
17 KiB
Java
package net.ME1312.SubServers.Sync.Network;
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import net.ME1312.SubServers.Sync.Event.SubNetworkConnectEvent;
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import net.ME1312.SubServers.Sync.Event.SubNetworkDisconnectEvent;
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import net.ME1312.SubServers.Sync.Library.Exception.IllegalPacketException;
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import net.ME1312.SubServers.Sync.Library.NamedContainer;
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import net.ME1312.SubServers.Sync.Library.Util;
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import net.ME1312.SubServers.Sync.Library.Version.Version;
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import net.ME1312.SubServers.Sync.Network.Packet.*;
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import net.ME1312.SubServers.Sync.Server.Server;
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import net.ME1312.SubServers.Sync.Server.SubServer;
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import net.ME1312.SubServers.Sync.SubPlugin;
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import org.json.JSONException;
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import org.json.JSONObject;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.io.PrintWriter;
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import java.lang.reflect.InvocationTargetException;
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import java.net.InetAddress;
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import java.net.InetSocketAddress;
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import java.net.Socket;
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import java.net.SocketException;
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import java.nio.charset.StandardCharsets;
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import java.util.*;
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import java.util.concurrent.TimeUnit;
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/**
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* SubData Direct Client Class
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*/
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public final class SubDataClient {
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private static HashMap<Class<? extends PacketOut>, String> pOut = new HashMap<Class<? extends PacketOut>, String>();
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private static HashMap<String, List<PacketIn>> pIn = new HashMap<String, List<PacketIn>>();
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private static boolean defaults = false;
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private PrintWriter writer;
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private NamedContainer<Boolean, Socket> socket;
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private Encryption encryption;
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private SubPlugin plugin;
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private LinkedList<NamedContainer<String, PacketOut>> queue;
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public enum Encryption {
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NONE,
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AES,
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AES_128,
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AES_192,
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AES_256
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}
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/**
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* SubServers Client Instance
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*
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* @param plugin SubPlugin
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* @param address Address
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* @param port Port
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* @param encryption Encryption Type
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* @throws IOException
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*/
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public SubDataClient(SubPlugin plugin, InetAddress address, int port, Encryption encryption) throws IOException {
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if (Util.isNull(plugin, address, port)) throw new NullPointerException();
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socket = new NamedContainer<>(false, new Socket(address, port));
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this.plugin = plugin;
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this.writer = new PrintWriter(socket.get().getOutputStream(), true);
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this.encryption = encryption;
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this.queue = new LinkedList<NamedContainer<String, PacketOut>>();
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if (!defaults) loadDefaults();
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loop();
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sendPacket(new NamedContainer<>(null, new PacketAuthorization(plugin)));
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}
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private void init() {
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plugin.subdata.sendPacket(new PacketDownloadLang(plugin));
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plugin.subdata.sendPacket(new PacketDownloadProxyInfo(proxy -> plugin.subdata.sendPacket(new PacketDownloadServerList(null, null, json -> {
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if (plugin.lastReload != proxy.getJSONObject("subservers").getLong("last-reload")) {
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System.out.println("SubServers > Resetting Server Data");
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plugin.servers.clear();
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plugin.lastReload = proxy.getJSONObject("subservers").getLong("last-reload");
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}
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for (String host : json.getJSONObject("hosts").keySet()) {
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for (String subserver : json.getJSONObject("hosts").getJSONObject(host).getJSONObject("servers").keySet()) {
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plugin.merge(subserver, json.getJSONObject("hosts").getJSONObject(host).getJSONObject("servers").getJSONObject(subserver), true);
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}
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}
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for (String server : json.getJSONObject("servers").keySet()) {
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plugin.merge(server, json.getJSONObject("servers").getJSONObject(server), false);
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}
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}))));
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while (queue.size() != 0) {
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sendPacket(queue.get(0));
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queue.remove(0);
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}
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socket.rename(true);
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plugin.getPluginManager().callEvent(new SubNetworkConnectEvent(this));
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}
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private void loadDefaults() {
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defaults = true;
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registerPacket(new PacketAuthorization(plugin), "Authorization");
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registerPacket(new PacketCommandServer(), "SubCommandServer");
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registerPacket(new PacketCreateServer(), "SubCreateServer");
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registerPacket(new PacketDownloadHostInfo(), "SubDownloadHostInfo");
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registerPacket(new PacketDownloadLang(plugin), "SubDownloadLang");
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registerPacket(new PacketDownloadNetworkList(), "SubDownloadNetworkList");
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registerPacket(new PacketDownloadPlayerList(), "SubDownloadPlayerList");
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registerPacket(new PacketDownloadProxyInfo(), "SubDownloadProxyInfo");
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registerPacket(new PacketDownloadServerInfo(), "SubDownloadServerInfo");
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registerPacket(new PacketDownloadServerList(), "SubDownloadServerList");
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registerPacket(new PacketInRunEvent(), "SubRunEvent");
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registerPacket(new PacketInReset(), "SubReset");
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registerPacket(new PacketStartServer(), "SubStartServer");
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registerPacket(new PacketStopServer(), "SubStopServer");
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registerPacket(PacketAuthorization.class, "Authorization");
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registerPacket(PacketCommandServer.class, "SubCommandServer");
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registerPacket(PacketCreateServer.class, "SubCreateServer");
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registerPacket(PacketDownloadHostInfo.class, "SubDownloadHostInfo");
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registerPacket(PacketDownloadLang.class, "SubDownloadLang");
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registerPacket(PacketDownloadNetworkList.class, "SubDownloadNetworkList");
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registerPacket(PacketDownloadPlayerList.class, "SubDownloadPlayerList");
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registerPacket(PacketDownloadProxyInfo.class, "SubDownloadProxyInfo");
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registerPacket(PacketDownloadServerInfo.class, "SubDownloadServerInfo");
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registerPacket(PacketDownloadServerList.class, "SubDownloadServerList");
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registerPacket(PacketStartServer.class, "SubStartServer");
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registerPacket(PacketStopServer.class, "SubStopServer");
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}
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private void loop() {
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new Thread(() -> {
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try {
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BufferedReader in = new BufferedReader(new InputStreamReader(socket.get().getInputStream()));
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String input;
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while ((input = in.readLine()) != null) {
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String decoded = null;
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try {
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switch (getEncryption()) {
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case AES:
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case AES_128:
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case AES_192:
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case AES_256:
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decoded = AES.decrypt(plugin.config.get().getSection("Settings").getSection("SubData").getRawString("Password"), Base64.getDecoder().decode(input)).get();
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break;
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default:
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decoded = new String(Base64.getDecoder().decode(input), StandardCharsets.UTF_8);
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}
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JSONObject json = new JSONObject(decoded);
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for (PacketIn packet : decodePacket(json)) {
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try {
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packet.execute((json.keySet().contains("c")) ? json.getJSONObject("c") : null);
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} catch (Throwable e) {
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new InvocationTargetException(e, "Exception while executing PacketIn").printStackTrace();
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}
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}
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} catch (JSONException e) {
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new IllegalPacketException("Unknown Packet Format: " + ((decoded == null || decoded.length() <= 0) ? input : decoded)).printStackTrace();
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} catch (IllegalPacketException e) {
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e.printStackTrace();
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} catch (Exception e) {
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new InvocationTargetException(e, "Exception while decoding packet").printStackTrace();
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}
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}
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try {
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destroy(plugin.config.get().getSection("Settings").getSection("SubData").getInt("Reconnect", 30));
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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} catch (Exception e) {
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if (!(e instanceof SocketException)) e.printStackTrace();
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try {
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destroy(plugin.config.get().getSection("Settings").getSection("SubData").getInt("Reconnect", 30));
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} catch (IOException e1) {
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e1.printStackTrace();
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}
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}
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}).start();
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}
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/**
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* Gets the Server Socket
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*
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* @return Server Socket
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*/
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public Socket getClient() {
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return socket.get();
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}
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/**
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* Gets the Connection's Encryption method
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*
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* @return Encryption method
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*/
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public Encryption getEncryption() {
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return encryption;
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}
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/**
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* Register PacketIn to the Network
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*
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* @param packet PacketIn to register
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* @param handle Handle to Bind
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*/
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public static void registerPacket(PacketIn packet, String handle) {
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if (Util.isNull(packet, handle)) throw new NullPointerException();
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List<PacketIn> list = (pIn.keySet().contains(handle.toLowerCase()))?pIn.get(handle.toLowerCase()):new ArrayList<PacketIn>();
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if (!list.contains(packet)) {
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list.add(packet);
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pIn.put(handle.toLowerCase(), list);
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}
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}
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/**
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* Unregister PacketIn from the Network
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*
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* @param packet PacketIn to unregister
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*/
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public static void unregisterPacket(PacketIn packet) {
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if (Util.isNull(packet)) throw new NullPointerException();
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List<String> search = new ArrayList<String>();
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search.addAll(pIn.keySet());
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for (String handle : search) if (pIn.get(handle.toLowerCase()).contains(packet)) {
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List<PacketIn> list = pIn.get(handle.toLowerCase());
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list.remove(packet);
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if (list.isEmpty()) {
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pIn.remove(handle.toLowerCase());
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} else {
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pIn.put(handle.toLowerCase(), list);
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}
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}
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}
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/**
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* Register PacketOut to the Network
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*
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* @param packet PacketOut to register
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* @param handle Handle to bind
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*/
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public static void registerPacket(Class<? extends PacketOut> packet, String handle) {
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if (Util.isNull(packet, handle)) throw new NullPointerException();
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pOut.put(packet, handle.toLowerCase());
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}
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/**
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* Unregister PacketOut to the Network
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*
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* @param packet PacketOut to unregister
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*/
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public static void unregisterPacket(Class<? extends PacketOut> packet) {
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if (Util.isNull(packet)) throw new NullPointerException();
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pOut.remove(packet);
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}
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/**
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* Grab PacketIn Instances via handle
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*
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* @param handle Handle
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* @return PacketIn
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*/
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public static List<? extends PacketIn> getPacket(String handle) {
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if (Util.isNull(handle)) throw new NullPointerException();
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return new ArrayList<PacketIn>(pIn.get(handle.toLowerCase()));
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}
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/**
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* Send Packet to Server
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*
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* @param packet Packet to send
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*/
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public void sendPacket(PacketOut packet) {
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if (Util.isNull(packet)) throw new NullPointerException();
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if (socket.get() == null || !socket.name()) {
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queue.add(new NamedContainer<>(null, packet));
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} else {
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sendPacket(new NamedContainer<>(null, packet));
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}
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}
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private void sendPacket(NamedContainer<String, PacketOut> packet) {
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try {
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JSONObject json = encodePacket(packet.get());
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if (packet.name() != null) json.put("f", packet.name());
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switch (getEncryption()) {
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case AES:
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case AES_128:
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writer.println(Base64.getEncoder().encodeToString(AES.encrypt(128, plugin.config.get().getSection("Settings").getSection("SubData").getRawString("Password"), json.toString())));
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break;
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case AES_192:
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writer.println(Base64.getEncoder().encodeToString(AES.encrypt(192, plugin.config.get().getSection("Settings").getSection("SubData").getRawString("Password"), json.toString())));
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break;
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case AES_256:
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writer.println(Base64.getEncoder().encodeToString(AES.encrypt(256, plugin.config.get().getSection("Settings").getSection("SubData").getRawString("Password"), json.toString())));
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break;
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default:
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writer.println(Base64.getEncoder().encodeToString(json.toString().getBytes(StandardCharsets.UTF_8)));
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}
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} catch (Throwable e) {
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e.printStackTrace();
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}
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}
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/**
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* Forward Packet to Client
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*
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* @param packet Packet to send
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* @param location Where to send
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*/
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public void forwardPacket(PacketOut packet, String location) {
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if (Util.isNull(packet, location)) throw new NullPointerException();
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if (socket.get() == null || !socket.name()) {
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queue.add(new NamedContainer<>(location, packet));
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} else {
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sendPacket(new NamedContainer<>(null, packet));
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}
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}
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/**
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* Broadcast packet to all Clients
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*
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* @param packet Packet to send
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*/
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public void broadcastPacket(PacketOut packet) {
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forwardPacket(packet, "");
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}
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/**
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* JSON Encode PacketOut
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*
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* @param packet PacketOut
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* @return JSON Formatted Packet
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* @throws IllegalPacketException
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*/
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private static JSONObject encodePacket(PacketOut packet) throws IllegalPacketException, InvocationTargetException {
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JSONObject json = new JSONObject();
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if (!pOut.keySet().contains(packet.getClass())) throw new IllegalPacketException("Unknown PacketOut Channel: " + packet.getClass().getCanonicalName());
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if (packet.getVersion().toString() == null) throw new NullPointerException("PacketOut Version cannot be null: " + packet.getClass().getCanonicalName());
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try {
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JSONObject contents = packet.generate();
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json.put("h", pOut.get(packet.getClass()));
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json.put("v", packet.getVersion().toString());
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if (contents != null) json.put("c", contents);
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return json;
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} catch (Throwable e) {
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throw new InvocationTargetException(e, "Exception while encoding packet");
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}
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}
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/**
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* JSON Decode PacketIn
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*
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* @param json JSON to Decode
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* @return PacketIn
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* @throws IllegalPacketException
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* @throws InvocationTargetException
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*/
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private static List<PacketIn> decodePacket(JSONObject json) throws IllegalPacketException, InvocationTargetException {
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if (!json.keySet().contains("h") || !json.keySet().contains("v")) throw new IllegalPacketException("Unknown Packet Format: " + json.toString());
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if (!pIn.keySet().contains(json.getString("h"))) throw new IllegalPacketException("Unknown PacketIn Channel: " + json.getString("h"));
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List<PacketIn> list = new ArrayList<PacketIn>();
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for (PacketIn packet : pIn.get(json.getString("h"))) {
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if (new Version(json.getString("v")).equals(packet.getVersion())) {
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list.add(packet);
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} else {
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new IllegalPacketException("Packet Version Mismatch in " + json.getString("h") + ": " + json.getString("v") + " -> " + packet.getVersion().toString()).printStackTrace();
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}
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}
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return list;
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}
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/**
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* Drops All Connections and Stops the SubData Listener
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*
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* @throws IOException
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*/
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public void destroy(int reconnect) throws IOException {
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if (Util.isNull(reconnect)) throw new NullPointerException();
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if (socket.get() != null) {
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final Socket socket = this.socket.get();
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this.socket.set(null);
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if (!socket.isClosed()) socket.close();
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plugin.getPluginManager().callEvent(new SubNetworkDisconnectEvent());
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System.out.println("SubServers > The SubData Connection was closed");
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if (reconnect > 0) {
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System.out.println("SubServers > Attempting to reconnect in " + reconnect + " seconds");
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Timer timer = new Timer();
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timer.scheduleAtFixedRate(new TimerTask() {
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@Override
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public void run() {
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try {
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plugin.subdata = new SubDataClient(plugin, socket.getInetAddress(), socket.getPort(), encryption);
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timer.cancel();
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while (queue.size() != 0) {
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if (queue.get(0).name() != null) {
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plugin.subdata.forwardPacket(queue.get(0).get(), queue.get(0).name());
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} else {
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plugin.subdata.sendPacket(queue.get(0).get());
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}
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queue.remove(0);
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}
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} catch (IOException e) {
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System.out.println("SubServers > Connection was unsuccessful, retrying in " + reconnect + " seconds");
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}
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}
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}, TimeUnit.SECONDS.toMillis(reconnect), TimeUnit.SECONDS.toMillis(reconnect));
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}
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}
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}
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}
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