patched crash loops and concurrency bugs in bungeecord

eaglercraftbungee/src/main/java/net/md_5/bungee/connection/InitialHandler.java

@@ -137,7 +137,10 @@ public class InitialHandler extends PacketHandler implements PendingConnection {
 			this.disconnect("Go fuck yourself");
 			return;
 		}
-		InetAddress sc = WebSocketProxy.localToRemote.get(this.ch.getHandle().remoteAddress());
+		InetAddress sc;
+		synchronized(WebSocketProxy.localToRemote) {
+			sc = WebSocketProxy.localToRemote.get(this.ch.getHandle().remoteAddress());
+		}
 		if(sc == null) {
 			this.bungee.getLogger().log(Level.WARNING, "player '" + un + "' doesn't have a websocket IP, remote address: " + this.ch.getHandle().remoteAddress().toString());
 		}else {
@@ -150,7 +153,10 @@ public class InitialHandler extends PacketHandler implements PendingConnection {
 				this.bungee.getLogger().log(Level.INFO, "Player '" + un + "' [" + sc.toString() + "] has remote websocket IP: " + sc.getHostAddress());
 			}
 		}
-		String dnm = WebSocketProxy.origins.get(this.ch.getHandle().remoteAddress());
+		String dnm;
+		synchronized(WebSocketProxy.localToRemote) {
+			dnm = WebSocketProxy.origins.get(this.ch.getHandle().remoteAddress());
+		}
 		if(dnm != null) {
 			if(dnm.equalsIgnoreCase("null")) {
 				this.bungee.getLogger().log(Level.INFO, "Player '" + un + "' [" + sc.toString() + "] is using an offline download");

eaglercraftbungee/src/main/java/net/md_5/bungee/eaglercraft/WebSocketProxy.java

@@ -47,8 +47,10 @@ public class WebSocketProxy extends SimpleChannelInboundHandler<ByteBuf> {
 	}
 	
 	public void killConnection() {
+		synchronized(localToRemote) {
 			localToRemote.remove(localAddress);
 			origins.remove(localAddress);
+		}
 		if(tcpChannel != null && tcpChannel.isOpen()) {
 			try {
 				tcpChannel.disconnect().sync();
@@ -72,17 +74,21 @@ public class WebSocketProxy extends SimpleChannelInboundHandler<ByteBuf> {
 				        socketChannel.closeFuture().addListener(new GenericFutureListener<Future<? super Void>>() {
 							@Override
 							public void operationComplete(Future<? super Void> paramF) throws Exception {
+								synchronized(localToRemote) {
 									localToRemote.remove(localAddress);
 									origins.remove(localAddress);
 								}
+							}
 						});
 				    }
 				});
 				tcpChannel = (NioSocketChannel) clientBootstrap.connect().sync().channel();
+				synchronized(localToRemote) {
 					localToRemote.put(localAddress = tcpChannel.localAddress(), realRemoteAddr);
 					if(origin != null) {
 						origins.put(localAddress, origin);
 					}
+				}
 				return true;
 			}
 		}catch(Throwable t) {
@@ -111,8 +117,10 @@ public class WebSocketProxy extends SimpleChannelInboundHandler<ByteBuf> {
 	}
 	
 	public void finalize() {
+		synchronized(localToRemote) {
 			localToRemote.remove(localAddress);
 			origins.remove(localAddress);
 		}
+	}
 	
 }

stable-download/java/bungee_command/config.yml

@@ -1,3 +1,6 @@
+origin_blacklist_block_replit_clients: false
+enable_web_origin_blacklist: true
+server_name: EaglercraftBungee Server
 listeners:
 - fallback_server: lobby
   tab_list: GLOBAL_PING
@@ -49,14 +52,11 @@ listeners:
       limit_lockout: 25
       lockout_duration: 900
       exceptions: []
+stats: 1795b100-6c57-4568-957f-810efbd77cc3
+groups: {}
 player_limit: -1
-timeout: 30000
-servers:
-  lobby:
-    address: localhost:25569
-    restricted: false
-server_name: EaglercraftBungee Server
-display_ban_type_on_kick: false
+origin_blacklist_block_offline_download: false
+origin_blacklist_block_missing_origin_header: false
 permissions:
   default:
   - bungeecord.command.server
@@ -79,4 +79,8 @@ permissions:
   - bungeecord.command.eag.blockdomain
   - bungeecord.command.eag.blockdomainname
   - bungeecord.command.eag.unblockdomain
-groups: {}
+origin_blacklist_subscriptions:
+- https://g.eags.us/eaglercraft/origin_blacklist.txt
+- https://raw.githubusercontent.com/LAX1DUDE/eaglercraft/main/stable-download/origin_blacklist.txt
+display_ban_type_on_kick: false
+timeout: 30000