first commit

source/patch/de/maxhenkel/voicechat/voice/server/ServerVoiceEvents.java

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+package de.maxhenkel.voicechat.voice.server;
+
+import de.maxhenkel.voicechat.Voicechat;
+import de.maxhenkel.voicechat.compatibility.PlayerHideEvent;
+import de.maxhenkel.voicechat.compatibility.PlayerShowEvent;
+import de.maxhenkel.voicechat.net.NetManager;
+import de.maxhenkel.voicechat.net.PacketRateLimiter;
+import de.maxhenkel.voicechat.net.RequestSecretPacket;
+import de.maxhenkel.voicechat.net.SecretPacket;
+import de.maxhenkel.voicechat.plugins.PluginManager;
+import de.maxhenkel.voicechat.voice.common.Secret;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+
+public class ServerVoiceEvents implements Listener {
+    private static final int LEGACY_COMPATIBILITY_VERSION = 18;
+    private static final int CURRENT_COMPATIBILITY_VERSION = 20;
+
+    private final Map<UUID, Integer> clientCompatibilities = new ConcurrentHashMap<>();
+    private final PacketRateLimiter rateLimiter;
+    private Server server;
+
+    public ServerVoiceEvents() {
+        this.rateLimiter = new PacketRateLimiter(Voicechat.SERVER_CONFIG.tcpRateLimit.get());
+    }
+
+    public void init() {
+        if (this.server != null) {
+            return;
+        }
+        if (!Bukkit.getOnlineMode()) {
+            Voicechat.LOGGER.warn("Running in offline mode - Voice chat encryption is not secure!", new Object[0]);
+        }
+        Voicechat.compatibility.registerPlayerHideEvent(this::onPlayerHide);
+        Voicechat.compatibility.registerPlayerShowEvent(this::onPlayerShow);
+        this.server = new Server();
+        this.server.start();
+        PluginManager.instance().onServerStarted();
+    }
+
+    public void onRequestSecretPacket(Player player, RequestSecretPacket packet) {
+        UUID playerUUID;
+        int clientVersion = packet.getCompatibilityVersion();
+        Voicechat.LOGGER.info("Received secret request of {} ({})", player.getName(), clientVersion);
+        try {
+            playerUUID = player.getUniqueId();
+        } catch (UnsupportedOperationException e) {
+            player.kickPlayer("Tried to authenticate voice chat while still connecting");
+            Voicechat.LOGGER.warn("{} tried to authenticate voice chat while still connecting", player.getName());
+            return;
+        }
+        this.clientCompatibilities.put(playerUUID, clientVersion);
+        if (!ServerVoiceEvents.isSupportedCompatibilityVersion(clientVersion)) {
+            Voicechat.LOGGER.warn("Connected client {} has incompatible voice chat version (server={}, client={})",
+                    player.getName(), Voicechat.COMPATIBILITY_VERSION, clientVersion);
+            ServerVoiceEvents.sendIncompatibleMessage(player, clientVersion);
+            return;
+        }
+        this.initializePlayerConnection(player);
+    }
+
+    private static boolean isSupportedCompatibilityVersion(int version) {
+        return version == LEGACY_COMPATIBILITY_VERSION || version == CURRENT_COMPATIBILITY_VERSION;
+    }
+
+    public boolean isCompatible(Player player) {
+        return this.isCompatible(player.getUniqueId());
+    }
+
+    public boolean isCompatible(UUID playerUuid) {
+        return ServerVoiceEvents.isSupportedCompatibilityVersion(this.clientCompatibilities.getOrDefault(playerUuid, -1));
+    }
+
+    public static void sendIncompatibleMessage(Player player, int clientCompatibilityVersion) {
+        if (clientCompatibilityVersion <= 6) {
+            player.sendMessage(String.format(Voicechat.TRANSLATIONS.voicechatNotCompatibleMessage.get(), "2.6.x", "Simple Voice Chat"));
+        } else {
+            Voicechat.compatibility.sendIncompatibleMessage(player, "2.6.x", "Simple Voice Chat");
+        }
+    }
+
+    public void initializePlayerConnection(Player player) {
+        if (this.server == null) {
+            return;
+        }
+        UUID playerUuid = player.getUniqueId();
+        this.server.getPlayerStateManager().onPlayerCompatibilityCheckSucceeded(player);
+        this.server.getCategoryManager().onPlayerCompatibilityCheckSucceeded(player);
+        this.server.getGroupManager().onPlayerCompatibilityCheckSucceeded(player);
+        Secret secret = this.server.generateNewSecret(playerUuid);
+        if (secret == null) {
+            Voicechat.LOGGER.warn("Player already requested secret - ignoring", new Object[0]);
+            return;
+        }
+        secret.setLegacyProtocol(this.clientCompatibilities.getOrDefault(playerUuid, -1) == LEGACY_COMPATIBILITY_VERSION);
+        String voiceHost = PluginManager.instance().getVoiceHost(player, Voicechat.SERVER_CONFIG.voiceHost.get());
+        NetManager.sendToClient(player, new SecretPacket(player, secret, this.server.getPort(), Voicechat.SERVER_CONFIG, voiceHost));
+        Voicechat.LOGGER.info("Sent secret to {}", player.getName());
+    }
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        this.server.getPlayerStateManager().onPlayerJoin(event);
+        if (!Voicechat.SERVER_CONFIG.forceVoiceChat.get().booleanValue()) {
+            return;
+        }
+        Player player = event.getPlayer();
+        Voicechat.compatibility.runTaskLater(() -> {
+            if (!player.isOnline()) {
+                return;
+            }
+            if (!this.isCompatible(player)) {
+                player.kickPlayer(String.format(Voicechat.TRANSLATIONS.forceVoicechatKickMessage.get(), "Simple Voice Chat", Voicechat.INSTANCE.getDescription().getVersion()));
+            }
+        }, (long) Voicechat.SERVER_CONFIG.loginTimeout.get().intValue() / 50L);
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        this.server.getPlayerStateManager().onPlayerQuit(event);
+        this.server.getGroupManager().onPlayerQuit(event);
+        UUID playerUuid = event.getPlayer().getUniqueId();
+        this.clientCompatibilities.remove(playerUuid);
+        this.rateLimiter.onPlayerLoggedOut(event.getPlayer());
+        if (this.server == null) {
+            return;
+        }
+        this.server.disconnectClient(playerUuid);
+        Voicechat.LOGGER.info("Disconnecting client {}", event.getPlayer().getName());
+    }
+
+    public void onPlayerHide(PlayerHideEvent event) {
+        this.server.getPlayerStateManager().onPlayerHide(event);
+    }
+
+    public void onPlayerShow(PlayerShowEvent event) {
+        this.server.getPlayerStateManager().onPlayerShow(event);
+    }
+
+    public PacketRateLimiter getRateLimiter() {
+        return this.rateLimiter;
+    }
+
+    public Server getServer() {
+        return this.server;
+    }
+}