From fd151cc8d3920be62b8dcdbeb29a78da5a98ac69 Mon Sep 17 00:00:00 2001 From: Jonas Konrad Date: Fri, 25 Apr 2014 23:46:46 +0200 Subject: [PATCH] Fix race condition that could kill connections before they were initiated Because NetworkManagers are registered before they get their channel in channelActive, the ServerConnection would remove them sometimes because it thought they were disconnected. This commit fixes this by introducing a 'preparing' variable that is true while the NetworkManager is not initialized. The ServerConnection does not remove NetworkManagers with this flag. diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java index 9939652..ae3de2f 100644 --- a/src/main/java/net/minecraft/server/NetworkManager.java +++ b/src/main/java/net/minecraft/server/NetworkManager.java @@ -45,6 +45,7 @@ public class NetworkManager extends SimpleChannelInboundHandler { public SocketAddress n; public java.util.UUID spoofedUUID; public Property[] spoofedProfile; + public boolean preparing = true; // Spigot End private PacketListener o; private EnumProtocol p; @@ -73,6 +74,9 @@ public class NetworkManager extends SimpleChannelInboundHandler { super.channelActive(channelhandlercontext); this.m = channelhandlercontext.channel(); this.n = this.m.remoteAddress(); + // Spigot Start + this.preparing = false; + // Spigot End this.a(EnumProtocol.HANDSHAKING); } @@ -191,6 +195,9 @@ public class NetworkManager extends SimpleChannelInboundHandler { } public void close(IChatBaseComponent ichatbasecomponent) { + // Spigot Start + this.preparing = false; + // Spigot End if (this.m.isOpen()) { this.m.close(); this.q = ichatbasecomponent; diff --git a/src/main/java/net/minecraft/server/ServerConnection.java b/src/main/java/net/minecraft/server/ServerConnection.java index 1d7b814..981e22c 100644 --- a/src/main/java/net/minecraft/server/ServerConnection.java +++ b/src/main/java/net/minecraft/server/ServerConnection.java @@ -66,6 +66,10 @@ public class ServerConnection { NetworkManager networkmanager = (NetworkManager) iterator.next(); if (!networkmanager.isConnected()) { + // Spigot Start + // Fix a race condition where a NetworkManager could be unregistered just before connection. + if (networkmanager.preparing) continue; + // Spigot End iterator.remove(); if (networkmanager.f() != null) { networkmanager.getPacketListener().a(networkmanager.f()); -- 1.9.1