geforkt von Mirrors/Paper
236 Zeilen
12 KiB
Diff
236 Zeilen
12 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Aikar <aikar@aikar.co>
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Date: Wed, 6 May 2020 04:53:35 -0400
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Subject: [PATCH] Optimize Network Manager and add advanced packet support
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Adds ability for 1 packet to bundle other packets to follow it
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adds ability for a packet to delay sending more packets until a state is ready.
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Removes synchronization from sending packets
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Removes processing packet queue off of main thread
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- for the few cases where it is allowed, order is not necessary nor
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should it even be happening concurrently in first place (handshaking/login/status)
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Ensures packets sent asynchronously are dispatched on main thread
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This helps ensure safety for ProtocolLib as packet listeners
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are commonly accessing world state. This will allow you to schedule
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a packet to be sent async, but itll be dispatched sync for packet
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listeners to process.
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This should solve some deadlock risks
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Part of this commit was authored by: Spottedleaf
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diff --git a/src/main/java/net/minecraft/server/NetworkManager.java b/src/main/java/net/minecraft/server/NetworkManager.java
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index b1dededc15cce686ead74a99bee64c89ac1de22c..f81014973a4cf50c1320f82c22ed1c19fd7d6ac9 100644
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--- a/src/main/java/net/minecraft/server/NetworkManager.java
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+++ b/src/main/java/net/minecraft/server/NetworkManager.java
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@@ -64,6 +64,10 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
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public int protocolVersion;
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public java.net.InetSocketAddress virtualHost;
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private static boolean enableExplicitFlush = Boolean.getBoolean("paper.explicit-flush");
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+ // Optimize network
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+ boolean isPending = true;
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+ boolean queueImmunity = false;
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+ EnumProtocol protocol;
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// Paper end
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public NetworkManager(EnumProtocolDirection enumprotocoldirection) {
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@@ -87,6 +91,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
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}
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public void setProtocol(EnumProtocol enumprotocol) {
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+ protocol = enumprotocol; // Paper
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this.channel.attr(NetworkManager.c).set(enumprotocol);
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this.channel.config().setAutoRead(true);
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NetworkManager.LOGGER.debug("Enabled auto read");
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@@ -158,19 +163,72 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
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NetworkManager.LOGGER.debug("Set listener of {} to {}", this, packetlistener);
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this.packetListener = packetlistener;
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}
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+ // Paper start
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+ private static class InnerUtil { // Attempt to hide these methods from ProtocolLib so it doesn't accidently pick them up.
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+ private static java.util.List<Packet> buildExtraPackets(Packet packet) {
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+ java.util.List<Packet> extra = packet.getExtraPackets();
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+ if (extra == null || extra.isEmpty()) {
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+ return null;
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+ }
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+ java.util.List<Packet> ret = new java.util.ArrayList<>(1 + extra.size());
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+ buildExtraPackets0(extra, ret);
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+ return ret;
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+ }
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+
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+ private static void buildExtraPackets0(java.util.List<Packet> extraPackets, java.util.List<Packet> into) {
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+ for (Packet extra : extraPackets) {
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+ into.add(extra);
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+ java.util.List<Packet> extraExtra = extra.getExtraPackets();
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+ if (extraExtra != null && !extraExtra.isEmpty()) {
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+ buildExtraPackets0(extraExtra, into);
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+ }
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+ }
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+ }
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+ // Paper start
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+ private static boolean canSendImmediate(NetworkManager networkManager, Packet<?> packet) {
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+ return networkManager.isPending || networkManager.protocol == EnumProtocol.HANDSHAKING || networkManager.protocol == EnumProtocol.STATUS || networkManager.queueImmunity ||
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+ packet instanceof PacketPlayOutKeepAlive ||
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+ packet instanceof PacketPlayOutChat ||
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+ packet instanceof PacketPlayOutTabComplete;
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+ }
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+ // Paper end
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+ }
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+ // Paper end
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public void sendPacket(Packet<?> packet) {
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this.sendPacket(packet, (GenericFutureListener) null);
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}
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public void sendPacket(Packet<?> packet, @Nullable GenericFutureListener<? extends Future<? super Void>> genericfuturelistener) {
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- if (this.isConnected()) {
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- this.o();
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- this.b(packet, genericfuturelistener);
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- } else {
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- this.packetQueue.add(new NetworkManager.QueuedPacket(packet, genericfuturelistener));
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+ // Paper start - handle oversized packets better
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+ boolean connected = this.isConnected();
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+ if (!connected && !preparing) return; // Do nothing
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+ if (connected && (InnerUtil.canSendImmediate(this, packet) || (
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+ MCUtil.isMainThread() && packet.isReady() && this.packetQueue.isEmpty() &&
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+ (packet.getExtraPackets() == null || packet.getExtraPackets().isEmpty())
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+ ))) {
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+ this.dispatchPacket(packet, genericfuturelistener);
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+ return;
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}
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+ // write the packets to the queue, then flush - antixray hooks there already
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+ java.util.List<Packet> extraPackets = InnerUtil.buildExtraPackets(packet);
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+ boolean hasExtraPackets = extraPackets != null && !extraPackets.isEmpty();
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+ if (!hasExtraPackets) {
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+ this.packetQueue.add(new NetworkManager.QueuedPacket(packet, genericfuturelistener));
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+ } else {
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+ java.util.List<NetworkManager.QueuedPacket> packets = new java.util.ArrayList<>(1 + extraPackets.size());
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+ packets.add(new NetworkManager.QueuedPacket(packet, null)); // delay the future listener until the end of the extra packets
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+ for (int i = 0, len = extraPackets.size(); i < len;) {
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+ Packet extra = extraPackets.get(i);
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+ boolean end = ++i == len;
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+ packets.add(new NetworkManager.QueuedPacket(extra, end ? genericfuturelistener : null)); // append listener to the end
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+ }
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+
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+ this.packetQueue.addAll(packets); // atomic
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+ }
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+ this.sendPacketQueue();
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+ // Paper end
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}
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private void dispatchPacket(Packet<?> packet, @Nullable GenericFutureListener<? extends Future<? super Void>> genericFutureListener) { this.b(packet, genericFutureListener); } // Paper - OBFHELPER
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@@ -214,21 +272,46 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
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}
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- private void sendPacketQueue() { this.o(); } // Paper - OBFHELPER
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- private void o() {
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- if (this.channel != null && this.channel.isOpen()) {
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- Queue queue = this.packetQueue;
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-
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+ // Paper start - rewrite this to be safer on
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+ private boolean sendPacketQueue() { return this.o(); } // OBFHELPER // void -> boolean
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+ private boolean o() { // void -> boolean
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+ if (!isConnected()) {
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+ return true;
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+ }
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+ if (MCUtil.isMainThread()) {
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+ return processQueue();
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+ } else if (isPending) {
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+ // Should only happen during login/status stages
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synchronized (this.packetQueue) {
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- NetworkManager.QueuedPacket networkmanager_queuedpacket;
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-
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- while ((networkmanager_queuedpacket = (NetworkManager.QueuedPacket) this.packetQueue.poll()) != null) {
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- this.b(networkmanager_queuedpacket.a, networkmanager_queuedpacket.b);
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- }
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+ return this.processQueue();
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+ }
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+ }
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+ return false;
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+ }
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+ private boolean processQueue() {
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+ if (this.packetQueue.isEmpty()) return true;
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+ // If we are on main, we are safe here in that nothing else should be processing queue off main anymore
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+ // But if we are not on main due to login/status, the parent is synchronized on packetQueue
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+ java.util.Iterator<QueuedPacket> iterator = this.packetQueue.iterator();
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+ while (iterator.hasNext()) {
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+ NetworkManager.QueuedPacket queued = iterator.next(); // poll -> peek
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+
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+ // Fix NPE (Spigot bug caused by handleDisconnection())
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+ if (queued == null) {
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+ return true;
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+ }
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+ Packet<?> packet = queued.getPacket();
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+ if (!packet.isReady()) {
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+ return false;
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+ } else {
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+ iterator.remove();
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+ this.dispatchPacket(packet, queued.getGenericFutureListener());
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}
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}
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+ return true;
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}
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+ // Paper end
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public void a() {
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this.o();
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@@ -260,6 +343,7 @@ public class NetworkManager extends SimpleChannelInboundHandler<Packet<?>> {
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public void close(IChatBaseComponent ichatbasecomponent) {
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// Spigot Start
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this.preparing = false;
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+ this.packetQueue.clear(); // Paper - just incase its closed before we ever get to the main thread to do this
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// Spigot End
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if (this.channel.isOpen()) {
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this.channel.close(); // We can't wait as this may be called from an event loop.
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diff --git a/src/main/java/net/minecraft/server/Packet.java b/src/main/java/net/minecraft/server/Packet.java
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index 2d8e6a2f4a0c3c5d74a647d7164b0028781d3bf5..45142ed9d2440e21dd1ff1a32a12759fea4dbcb4 100644
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--- a/src/main/java/net/minecraft/server/Packet.java
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+++ b/src/main/java/net/minecraft/server/Packet.java
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@@ -11,6 +11,8 @@ public interface Packet<T extends PacketListener> {
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void a(T t0);
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// Paper start
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+ default boolean isReady() { return true; }
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+ default java.util.List<Packet> getExtraPackets() { return null; }
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default boolean packetTooLarge(NetworkManager manager) {
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return false;
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}
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diff --git a/src/main/java/net/minecraft/server/PlayerList.java b/src/main/java/net/minecraft/server/PlayerList.java
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index e148940ab3721cff27cf791c159c11b9b94191e4..e917d37382dab70ed9e6b62decf1557c33b26065 100644
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--- a/src/main/java/net/minecraft/server/PlayerList.java
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+++ b/src/main/java/net/minecraft/server/PlayerList.java
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@@ -143,6 +143,7 @@ public abstract class PlayerList {
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// CraftBukkit - getType()
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// Spigot - view distance
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+ networkmanager.queueImmunity = true; // Paper
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playerconnection.sendPacket(new PacketPlayOutLogin(entityplayer.getId(), entityplayer.playerInteractManager.getGameMode(), WorldData.c(worlddata.getSeed()), worlddata.isHardcore(), worldserver.worldProvider.getDimensionManager().getType(), this.getMaxPlayers(), worlddata.getType(), worldserver.spigotConfig.viewDistance, flag1, !flag));
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entityplayer.getBukkitEntity().sendSupportedChannels(); // CraftBukkit
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playerconnection.sendPacket(new PacketPlayOutCustomPayload(PacketPlayOutCustomPayload.a, (new PacketDataSerializer(Unpooled.buffer())).a(this.getServer().getServerModName())));
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@@ -152,6 +153,7 @@ public abstract class PlayerList {
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playerconnection.sendPacket(new PacketPlayOutRecipeUpdate(this.server.getCraftingManager().b()));
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playerconnection.sendPacket(new PacketPlayOutTags(this.server.getTagRegistry()));
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playerconnection.sendPacket(new PacketPlayOutEntityStatus(entityplayer, (byte) (worldserver.getGameRules().getBoolean(GameRules.REDUCED_DEBUG_INFO) ? 22 : 23))); // Paper - fix this rule not being initialized on the client
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+ networkmanager.queueImmunity = false; // Paper
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this.d(entityplayer);
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entityplayer.getStatisticManager().c();
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entityplayer.B().a(entityplayer);
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diff --git a/src/main/java/net/minecraft/server/ServerConnection.java b/src/main/java/net/minecraft/server/ServerConnection.java
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index 37a22ba6f7a2ac54759428d23d5ea9787bb557f7..06cd29bb9a5d6b67f896c129662c3f493238c758 100644
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--- a/src/main/java/net/minecraft/server/ServerConnection.java
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+++ b/src/main/java/net/minecraft/server/ServerConnection.java
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@@ -45,6 +45,7 @@ public class ServerConnection {
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NetworkManager manager = null;
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while ((manager = pending.poll()) != null) {
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connectedChannels.add(manager);
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+ manager.isPending = false;
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}
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}
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// Paper end
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