mirror of
https://github.com/PaperMC/Paper.git
synced 2024-09-11 22:48:21 +02:00
1145 lines
43 KiB
Diff
1145 lines
43 KiB
Diff
From 2fda9f46b36ce7627c1f37785fc8bf4892f8a161 Mon Sep 17 00:00:00 2001
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From: md_5 <md_5@live.com.au>
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Date: Thu, 14 Feb 2013 17:32:20 +1100
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Subject: [PATCH] Netty
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Implement an uber efficient network engine based on the
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Java NIO framework Netty. This is basically a complete rewrite of the
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Minecraft network engine with many distinct advantages. First and foremost,
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there will no longer be the horrid, and redundant case of 2, or even at
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times, 3 threads per a connection. Instead low level select/epoll based NIO
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is used. The number of threads used for network reading and writing will
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scale automatically to the number of cores for use on your server. In most
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cases this will be around 8 threads for a 4 core server, much better than the
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up to 1000 threads that could be in use at one time with the old engine. To
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facilitate asynchronous packet sending or receiving (currently only chat), a
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thread pool of 16 threads is kept handy. == Plugin incompatibilities As a
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side effect of this change, plugins which rely on very specific
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implementation level details within Minecraft are broken. At this point in
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time, TagAPI and ProtocolLib are affected. If you are a user of ProtocolLib
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you are advised to update to the latest build, where full support is enabled.
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If you are a user of TagAPI, support has not yet been added, so you will need
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to install the updated ProtocolLib so that TagAPI may use its functions. ==
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Stability The code within this commit has been very lightly tested in
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production (300 players for approximately 24 hours), however it is not
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guaranteed to be free from all bugs. If you experence weird connection
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behaviour, reporting the bug and steps to reproduce are advised. You are also
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free to downgrade to the latest recommend build, which is guaranteed to be
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stable. == Summary This commit provides a reduction in threads, which gives
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the CPU / operating system more time to allocate to the main server threads,
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as well as various other side benefits such as chat thread pooling and a
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slight reduction in latency. This commit is licensed under the Creative
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Commons Attribution-ShareAlike 3.0 Unported license.
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---
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pom.xml | 5 +
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.../java/net/minecraft/server/DedicatedServer.java | 8 +-
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.../java/net/minecraft/server/INetworkManager.java | 24 ++
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.../net/minecraft/server/Packet51MapChunk.java | 2 +-
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.../net/minecraft/server/Packet56MapChunkBulk.java | 2 +-
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.../net/minecraft/server/PendingConnection.java | 11 +-
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.../net/minecraft/server/ThreadCommandReader.java | 1 +
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.../net/minecraft/server/ThreadLoginVerifier.java | 1 +
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.../craftbukkit/scheduler/CraftScheduler.java | 2 +-
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src/main/java/org/spigotmc/netty/CipherCodec.java | 49 ++++
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.../org/spigotmc/netty/NettyNetworkManager.java | 229 +++++++++++++++++++
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.../org/spigotmc/netty/NettyServerConnection.java | 109 +++++++++
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.../org/spigotmc/netty/NettySocketAdaptor.java | 248 +++++++++++++++++++++
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.../java/org/spigotmc/netty/PacketDecoder.java | 64 ++++++
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.../java/org/spigotmc/netty/PacketEncoder.java | 43 ++++
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.../java/org/spigotmc/netty/PacketListener.java | 100 +++++++++
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src/main/java/org/spigotmc/netty/ReadState.java | 16 ++
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17 files changed, 906 insertions(+), 8 deletions(-)
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create mode 100644 src/main/java/net/minecraft/server/INetworkManager.java
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create mode 100644 src/main/java/org/spigotmc/netty/CipherCodec.java
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create mode 100644 src/main/java/org/spigotmc/netty/NettyNetworkManager.java
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create mode 100644 src/main/java/org/spigotmc/netty/NettyServerConnection.java
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create mode 100644 src/main/java/org/spigotmc/netty/NettySocketAdaptor.java
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create mode 100644 src/main/java/org/spigotmc/netty/PacketDecoder.java
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create mode 100644 src/main/java/org/spigotmc/netty/PacketEncoder.java
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create mode 100644 src/main/java/org/spigotmc/netty/PacketListener.java
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create mode 100644 src/main/java/org/spigotmc/netty/ReadState.java
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diff --git a/pom.xml b/pom.xml
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index 8f2e071..73c676a 100644
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--- a/pom.xml
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+++ b/pom.xml
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@@ -132,6 +132,11 @@
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<artifactId>trove4j</artifactId>
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<version>3.0.2</version>
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</dependency>
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+ <dependency>
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+ <groupId>io.netty</groupId>
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+ <artifactId>netty-all</artifactId>
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+ <version>4.0.0.Beta3</version>
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+ </dependency>
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</dependencies>
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<!-- This builds a completely 'ready to start' jar with all dependencies inside -->
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diff --git a/src/main/java/net/minecraft/server/DedicatedServer.java b/src/main/java/net/minecraft/server/DedicatedServer.java
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index bd7e41c..c189b1b 100644
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--- a/src/main/java/net/minecraft/server/DedicatedServer.java
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+++ b/src/main/java/net/minecraft/server/DedicatedServer.java
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@@ -34,7 +34,7 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
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super(options);
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// CraftBukkit end
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this.l = new ConsoleLogManager("Minecraft-Server", (String) null, (String) null); // CraftBukkit - null last argument
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- new ThreadSleepForever(this);
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+ // new ThreadSleepForever(this); // Spigot
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}
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protected boolean init() throws java.net.UnknownHostException { // CraftBukkit - throws UnknownHostException
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@@ -94,7 +94,11 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
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this.getLogger().info("Starting Minecraft server on " + (this.getServerIp().length() == 0 ? "*" : this.getServerIp()) + ":" + this.G());
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try {
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- this.r = new DedicatedServerConnection(this, inetaddress, this.G());
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+ // Spigot start
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+ this.r = (!Boolean.getBoolean("org.spigotmc.netty.disabled"))
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+ ? new org.spigotmc.netty.NettyServerConnection(this, inetaddress, this.G())
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+ : new DedicatedServerConnection(this, inetaddress, this.G());
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+ // Spigot end
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} catch (Throwable ioexception) { // CraftBukkit - IOException -> Throwable
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this.getLogger().warning("**** FAILED TO BIND TO PORT!");
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this.getLogger().warning("The exception was: {0}", new Object[] { ioexception.toString()});
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diff --git a/src/main/java/net/minecraft/server/INetworkManager.java b/src/main/java/net/minecraft/server/INetworkManager.java
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new file mode 100644
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index 0000000..ff3daae
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--- /dev/null
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+++ b/src/main/java/net/minecraft/server/INetworkManager.java
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@@ -0,0 +1,24 @@
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+package net.minecraft.server;
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+
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+import java.net.SocketAddress;
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+
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+public interface INetworkManager {
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+
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+ void a(Connection connection);
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+
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+ void queue(Packet packet);
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+
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+ void a();
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+
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+ void b();
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+
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+ SocketAddress getSocketAddress();
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+
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+ void d();
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+
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+ int e();
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+
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+ void a(String s, Object... aobject);
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+
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+ java.net.Socket getSocket();
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+}
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diff --git a/src/main/java/net/minecraft/server/Packet51MapChunk.java b/src/main/java/net/minecraft/server/Packet51MapChunk.java
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index 230dd62..2ba0464 100644
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--- a/src/main/java/net/minecraft/server/Packet51MapChunk.java
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+++ b/src/main/java/net/minecraft/server/Packet51MapChunk.java
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@@ -42,7 +42,7 @@ public class Packet51MapChunk extends Packet {
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this.b = chunk.z;
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this.e = flag;
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ChunkMap chunkmap = a(chunk, flag, i);
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- Deflater deflater = new Deflater(-1);
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+ Deflater deflater = new Deflater(4);
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this.d = chunkmap.c;
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this.c = chunkmap.b;
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diff --git a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
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index 9d5cee7..8486d82 100644
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--- a/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
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+++ b/src/main/java/net/minecraft/server/Packet56MapChunkBulk.java
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@@ -24,7 +24,7 @@ public class Packet56MapChunkBulk extends Packet {
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@Override
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protected Deflater initialValue() {
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// Don't use higher compression level, slows things down too much
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- return new Deflater(6);
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+ return new Deflater(4);
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}
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};
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// CraftBukkit end
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diff --git a/src/main/java/net/minecraft/server/PendingConnection.java b/src/main/java/net/minecraft/server/PendingConnection.java
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index 5f4bcf2..58687ed 100644
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--- a/src/main/java/net/minecraft/server/PendingConnection.java
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+++ b/src/main/java/net/minecraft/server/PendingConnection.java
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@@ -17,7 +17,7 @@ public class PendingConnection extends Connection {
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private static Random random = new Random();
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private byte[] d;
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private final MinecraftServer server;
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- public final NetworkManager networkManager;
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+ public final INetworkManager networkManager;
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public boolean b = false;
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private int f = 0;
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private String g = null;
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@@ -27,10 +27,15 @@ public class PendingConnection extends Connection {
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private SecretKey k = null;
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public String hostname = ""; // CraftBukkit - add field
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+ public PendingConnection(MinecraftServer minecraftserver, org.spigotmc.netty.NettyNetworkManager networkManager) {
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+ this.server = minecraftserver;
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+ this.networkManager = networkManager;
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+ }
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+
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public PendingConnection(MinecraftServer minecraftserver, Socket socket, String s) throws java.io.IOException { // CraftBukkit - throws IOException
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this.server = minecraftserver;
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this.networkManager = new NetworkManager(minecraftserver.getLogger(), socket, s, this, minecraftserver.F().getPrivate());
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- this.networkManager.e = 0;
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+ // this.networkManager.e = 0;
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}
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// CraftBukkit start
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@@ -146,7 +151,7 @@ public class PendingConnection extends Connection {
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// CraftBukkit
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org.bukkit.event.server.ServerListPingEvent pingEvent = org.bukkit.craftbukkit.event.CraftEventFactory.callServerListPingEvent(this.server.server, getSocket().getInetAddress(), this.server.getMotd(), playerlist.getPlayerCount(), playerlist.getMaxPlayers());
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- if (packet254getinfo.a == 1) {
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+ if (true) {
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// CraftBukkit start - fix decompile issues, don't create a list from an array
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Object[] list = new Object[] { 1, 60, this.server.getVersion(), pingEvent.getMotd(), playerlist.getPlayerCount(), pingEvent.getMaxPlayers() };
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diff --git a/src/main/java/net/minecraft/server/ThreadCommandReader.java b/src/main/java/net/minecraft/server/ThreadCommandReader.java
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index 489e184..9533b6f 100644
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--- a/src/main/java/net/minecraft/server/ThreadCommandReader.java
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+++ b/src/main/java/net/minecraft/server/ThreadCommandReader.java
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@@ -11,6 +11,7 @@ class ThreadCommandReader extends Thread {
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final DedicatedServer server;
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ThreadCommandReader(DedicatedServer dedicatedserver) {
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+ super("Command Reader Thread"); // Spigot
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this.server = dedicatedserver;
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}
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diff --git a/src/main/java/net/minecraft/server/ThreadLoginVerifier.java b/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
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index c185f64..abe0b81 100644
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--- a/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
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+++ b/src/main/java/net/minecraft/server/ThreadLoginVerifier.java
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@@ -21,6 +21,7 @@ class ThreadLoginVerifier extends Thread {
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CraftServer server;
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ThreadLoginVerifier(PendingConnection pendingconnection, CraftServer server) {
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+ super("Login Verifier Thread");
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this.server = server;
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// CraftBukkit end
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this.pendingConnection = pendingconnection;
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diff --git a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
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index 0a5c61a..35badf3 100644
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--- a/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
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+++ b/src/main/java/org/bukkit/craftbukkit/scheduler/CraftScheduler.java
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@@ -70,7 +70,7 @@ public class CraftScheduler implements BukkitScheduler {
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*/
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private final ConcurrentHashMap<Integer, CraftTask> runners = new ConcurrentHashMap<Integer, CraftTask>();
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private volatile int currentTick = -1;
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- private final Executor executor = Executors.newCachedThreadPool();
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+ private final Executor executor = Executors.newCachedThreadPool(new com.google.common.util.concurrent.ThreadFactoryBuilder().setNameFormat("Craft Scheduler Thread - %1$d").build()); // Spigot
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private CraftAsyncDebugger debugHead = new CraftAsyncDebugger(-1, null, null) {@Override StringBuilder debugTo(StringBuilder string) {return string;}};
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private CraftAsyncDebugger debugTail = debugHead;
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private static final int RECENT_TICKS;
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diff --git a/src/main/java/org/spigotmc/netty/CipherCodec.java b/src/main/java/org/spigotmc/netty/CipherCodec.java
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new file mode 100644
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index 0000000..54928b4
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--- /dev/null
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+++ b/src/main/java/org/spigotmc/netty/CipherCodec.java
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@@ -0,0 +1,49 @@
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+package org.spigotmc.netty;
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+
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+import io.netty.buffer.ByteBuf;
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+import io.netty.channel.ChannelHandlerContext;
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+import io.netty.handler.codec.ByteToByteCodec;
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+import javax.crypto.Cipher;
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+import javax.crypto.ShortBufferException;
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+
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+/**
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+ * This class is a complete solution for encrypting and decoding bytes in a
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+ * Netty stream. It takes two {@link Cipher} instances, used for encryption and
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+ * decryption respectively.
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+ */
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+public class CipherCodec extends ByteToByteCodec {
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+
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+ private Cipher encrypt;
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+ private Cipher decrypt;
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+ private byte[] heapIn = new byte[0];
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+ private byte[] heapOut = new byte[0];
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+
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+ public CipherCodec(Cipher encrypt, Cipher decrypt) {
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+ this.encrypt = encrypt;
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+ this.decrypt = decrypt;
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+ }
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+
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+ @Override
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+ public void encode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
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+ cipher(in, out, encrypt);
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+ }
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+
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+ @Override
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+ public void decode(ChannelHandlerContext ctx, ByteBuf in, ByteBuf out) throws Exception {
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+ cipher(in, out, decrypt);
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+ }
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+
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+ private void cipher(ByteBuf in, ByteBuf out, Cipher cipher) throws ShortBufferException {
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+ int readableBytes = in.readableBytes();
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+ if (heapIn.length < readableBytes) {
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+ heapIn = new byte[readableBytes];
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+ }
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+ in.readBytes(heapIn, 0, readableBytes);
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+
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+ int outputSize = cipher.getOutputSize(readableBytes);
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+ if (heapOut.length < outputSize) {
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+ heapOut = new byte[outputSize];
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+ }
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+ out.writeBytes(heapOut, 0, cipher.update(heapIn, 0, readableBytes, heapOut));
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+ }
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+}
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diff --git a/src/main/java/org/spigotmc/netty/NettyNetworkManager.java b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
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new file mode 100644
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index 0000000..be80ee2
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--- /dev/null
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+++ b/src/main/java/org/spigotmc/netty/NettyNetworkManager.java
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@@ -0,0 +1,229 @@
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+package org.spigotmc.netty;
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+
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+import com.google.common.util.concurrent.ThreadFactoryBuilder;
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+import io.netty.channel.Channel;
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+import io.netty.channel.ChannelHandlerContext;
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+import io.netty.channel.ChannelInboundMessageHandlerAdapter;
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+import io.netty.channel.socket.SocketChannel;
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+import java.net.Socket;
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+import java.net.SocketAddress;
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+import java.security.PrivateKey;
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+import java.util.AbstractList;
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+import java.util.List;
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+import java.util.Queue;
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+import java.util.concurrent.ConcurrentLinkedQueue;
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+import java.util.concurrent.ExecutorService;
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+import java.util.concurrent.Executors;
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+import javax.crypto.Cipher;
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+import javax.crypto.SecretKey;
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+import net.minecraft.server.Connection;
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+import net.minecraft.server.INetworkManager;
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+import net.minecraft.server.MinecraftServer;
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+import net.minecraft.server.Packet;
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+import net.minecraft.server.Packet252KeyResponse;
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+import net.minecraft.server.PendingConnection;
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+import net.minecraft.server.PlayerConnection;
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+
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+/**
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+ * This class forms the basis of the Netty integration. It implements
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+ * {@link INetworkManager} and handles all events and inbound messages provided
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+ * by the upstream Netty process.
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+ */
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+public class NettyNetworkManager extends ChannelInboundMessageHandlerAdapter<Packet> implements INetworkManager {
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+
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+ private static final ExecutorService threadPool = Executors.newCachedThreadPool(new ThreadFactoryBuilder().setNameFormat("Async Packet Handler - %1$d").build());
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+ private static final MinecraftServer server = MinecraftServer.getServer();
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+ private static final PrivateKey key = server.F().getPrivate();
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+ private static final NettyServerConnection serverConnection = (NettyServerConnection) server.ae();
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+ /*========================================================================*/
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+ private final Queue<Packet> syncPackets = new ConcurrentLinkedQueue<Packet>();
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+ private final List<Packet> highPriorityQueue = new AbstractList<Packet>() {
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+ @Override
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+ public void add(int index, Packet element) {
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+ // NOP
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+ }
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+
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+ @Override
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+ public Packet get(int index) {
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+ throw new UnsupportedOperationException();
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+ }
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+
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+ @Override
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+ public int size() {
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+ return 0;
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+ }
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+ };
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+ private volatile boolean connected;
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+ private Channel channel;
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+ private SocketAddress address;
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+ private Connection connection;
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+ private SecretKey secret;
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+ private String dcReason;
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+ private Object[] dcArgs;
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+ private Socket socketAdaptor;
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+
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+ @Override
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+ public void channelActive(ChannelHandlerContext ctx) throws Exception {
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+ // Channel and address groundwork first
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+ channel = ctx.channel();
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+ address = channel.remoteAddress();
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+ // Then the socket adaptor
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+ socketAdaptor = NettySocketAdaptor.adapt((SocketChannel) channel);
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+ // Followed by their first handler
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+ connection = new PendingConnection(server, this);
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+ // Finally register the connection
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+ connected = true;
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+ serverConnection.pendingConnections.add((PendingConnection) connection);
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+ }
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+
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+ @Override
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+ public void channelInactive(ChannelHandlerContext ctx) throws Exception {
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+ a("disconnect.endOfStream", new Object[0]);
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+ }
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+
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+ @Override
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+ public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
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+ // TODO: Remove this once we are more stable
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+ // Bukkit.getServer().getLogger().severe("======================= Start Netty Debug Log =======================");
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+ // Bukkit.getServer().getLogger().log(Level.SEVERE, "Error caught whilst handling " + channel, cause);
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+ // Bukkit.getServer().getLogger().severe("======================= End Netty Debug Log =======================");
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+ // Disconnect with generic reason + exception
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+ a("disconnect.genericReason", new Object[]{"Internal exception: " + cause});
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+ }
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+
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+ @Override
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+ public void messageReceived(ChannelHandlerContext ctx, final Packet msg) throws Exception {
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+ if (msg instanceof Packet252KeyResponse) {
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+ secret = ((Packet252KeyResponse) msg).a(key);
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+ }
|
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+
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+ if (msg.a_()) {
|
|
+ threadPool.submit(new Runnable() {
|
|
+ public void run() {
|
|
+ Packet packet = PacketListener.callReceived(NettyNetworkManager.this, connection, msg);
|
|
+ if (packet != null) {
|
|
+ packet.handle(connection);
|
|
+ }
|
|
+ }
|
|
+ });
|
|
+ } else {
|
|
+ syncPackets.add(msg);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ public Socket getSocket() {
|
|
+ return socketAdaptor;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * setHandler. Set the {@link NetHandler} used to process received packets.
|
|
+ *
|
|
+ * @param nh the new {@link NetHandler} instance
|
|
+ */
|
|
+ public void a(Connection nh) {
|
|
+ connection = nh;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * queue. Queue a packet for sending, or in this case send it to be write it
|
|
+ * straight to the channel.
|
|
+ *
|
|
+ * @param packet the packet to queue
|
|
+ */
|
|
+ public void queue(Packet packet) {
|
|
+ // Only send if channel is still connected
|
|
+ if (connected) {
|
|
+ // Process packet via handler
|
|
+ packet = PacketListener.callQueued(this, connection, packet);
|
|
+ // If handler indicates packet send
|
|
+ if (packet != null) {
|
|
+ highPriorityQueue.add(packet);
|
|
+ channel.write(packet);
|
|
+
|
|
+ // If needed, check and prepare encryption phase
|
|
+ if (packet instanceof Packet252KeyResponse) {
|
|
+ Cipher encrypt = NettyServerConnection.getCipher(Cipher.ENCRYPT_MODE, secret);
|
|
+ Cipher decrypt = NettyServerConnection.getCipher(Cipher.DECRYPT_MODE, secret);
|
|
+ CipherCodec codec = new CipherCodec(encrypt, decrypt);
|
|
+ channel.pipeline().addBefore("decoder", "cipher", codec);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * wakeThreads. In Vanilla this method will interrupt the network read and
|
|
+ * write threads, thus waking them.
|
|
+ */
|
|
+ public void a() {
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * processPackets. Remove up to 1000 packets from the queue and process
|
|
+ * them. This method should only be called from the main server thread.
|
|
+ */
|
|
+ public void b() {
|
|
+ for (int i = 1000; !syncPackets.isEmpty() && i >= 0; i--) {
|
|
+ if (connection instanceof PendingConnection ? ((PendingConnection) connection).b : ((PlayerConnection) connection).disconnected) {
|
|
+ syncPackets.clear();
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ Packet packet = PacketListener.callReceived(this, connection, syncPackets.poll());
|
|
+ if (packet != null) {
|
|
+ packet.handle(connection);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ // Disconnect via the handler - this performs all plugin related cleanup + logging
|
|
+ if (!connected && (dcReason != null || dcArgs != null)) {
|
|
+ connection.a(dcReason, dcArgs);
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * getSocketAddress. Return the remote address of the connected user. It is
|
|
+ * important that this method returns a value even after disconnect.
|
|
+ *
|
|
+ * @return the remote address of this connection
|
|
+ */
|
|
+ public SocketAddress getSocketAddress() {
|
|
+ return address;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * close. Close and release all resources associated with this connection.
|
|
+ */
|
|
+ public void d() {
|
|
+ if (connected) {
|
|
+ connected = false;
|
|
+ channel.close();
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * queueSize. Return the number of packets in the low priority queue. In a
|
|
+ * NIO environment this will always be 0.
|
|
+ *
|
|
+ * @return the size of the packet send queue
|
|
+ */
|
|
+ public int e() {
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * networkShutdown. Shuts down this connection, storing the reason and
|
|
+ * parameters, used to notify the current {@link Connection}.
|
|
+ *
|
|
+ * @param reason the main disconnect reason
|
|
+ * @param arguments additional disconnect arguments, for example, the
|
|
+ * exception which triggered the disconnect.
|
|
+ */
|
|
+ public void a(String reason, Object... arguments) {
|
|
+ if (connected) {
|
|
+ dcReason = reason;
|
|
+ dcArgs = arguments;
|
|
+ d();
|
|
+ }
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/NettyServerConnection.java b/src/main/java/org/spigotmc/netty/NettyServerConnection.java
|
|
new file mode 100644
|
|
index 0000000..9803105
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/NettyServerConnection.java
|
|
@@ -0,0 +1,109 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+import com.google.common.util.concurrent.ThreadFactoryBuilder;
|
|
+import io.netty.bootstrap.ServerBootstrap;
|
|
+import io.netty.channel.Channel;
|
|
+import io.netty.channel.ChannelException;
|
|
+import io.netty.channel.ChannelFuture;
|
|
+import io.netty.channel.ChannelInitializer;
|
|
+import io.netty.channel.ChannelOption;
|
|
+import io.netty.channel.nio.NioEventLoopGroup;
|
|
+import io.netty.channel.socket.nio.NioServerSocketChannel;
|
|
+import io.netty.handler.timeout.ReadTimeoutHandler;
|
|
+import java.net.InetAddress;
|
|
+import java.security.GeneralSecurityException;
|
|
+import java.security.Key;
|
|
+import java.util.ArrayList;
|
|
+import java.util.Collections;
|
|
+import java.util.List;
|
|
+import java.util.logging.Level;
|
|
+import javax.crypto.Cipher;
|
|
+import javax.crypto.spec.IvParameterSpec;
|
|
+import net.minecraft.server.MinecraftServer;
|
|
+import net.minecraft.server.PendingConnection;
|
|
+import net.minecraft.server.ServerConnection;
|
|
+import org.bukkit.Bukkit;
|
|
+
|
|
+/**
|
|
+ * This is the NettyServerConnection class. It implements
|
|
+ * {@link ServerConnection} and is the main interface between the Minecraft
|
|
+ * server and this NIO implementation. It handles starting, stopping and
|
|
+ * processing the Netty backend.
|
|
+ */
|
|
+public class NettyServerConnection extends ServerConnection {
|
|
+
|
|
+ private final ChannelFuture socket;
|
|
+ final List<PendingConnection> pendingConnections = Collections.synchronizedList(new ArrayList<PendingConnection>());
|
|
+
|
|
+ public NettyServerConnection(MinecraftServer ms, InetAddress host, int port) {
|
|
+ super(ms);
|
|
+ int threads = Integer.getInteger("org.spigotmc.netty.threads", 3);
|
|
+ socket = new ServerBootstrap().channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer() {
|
|
+ @Override
|
|
+ public void initChannel(Channel ch) throws Exception {
|
|
+ try {
|
|
+ ch.config().setOption(ChannelOption.IP_TOS, 0x18);
|
|
+ } catch (ChannelException ex) {
|
|
+ // IP_TOS is not supported (Windows XP / Windows Server 2003)
|
|
+ }
|
|
+
|
|
+ ch.pipeline()
|
|
+ .addLast("timer", new ReadTimeoutHandler(30))
|
|
+ .addLast("decoder", new PacketDecoder())
|
|
+ .addLast("encoder", new PacketEncoder())
|
|
+ .addLast("manager", new NettyNetworkManager());
|
|
+ }
|
|
+ }).group(new NioEventLoopGroup(threads, new ThreadFactoryBuilder().setNameFormat("Netty IO Thread - %1$d").build())).localAddress(host, port).bind();
|
|
+ MinecraftServer.getServer().getLogger().info("Using Netty NIO with " + threads + " threads for network connections.");
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * Pulse. This method pulses all connections causing them to update. It is
|
|
+ * called from the main server thread a few times a tick.
|
|
+ */
|
|
+ @Override
|
|
+ public void b() {
|
|
+ super.b(); // pulse PlayerConnections
|
|
+ for (int i = 0; i < pendingConnections.size(); ++i) {
|
|
+ PendingConnection connection = pendingConnections.get(i);
|
|
+
|
|
+ try {
|
|
+ connection.c();
|
|
+ } catch (Exception ex) {
|
|
+ connection.disconnect("Internal server error");
|
|
+ Bukkit.getServer().getLogger().log(Level.WARNING, "Failed to handle packet: " + ex, ex);
|
|
+ }
|
|
+
|
|
+ if (connection.b) {
|
|
+ pendingConnections.remove(i--);
|
|
+ }
|
|
+ }
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * Shutdown. This method is called when the server is shutting down and the
|
|
+ * server socket and all clients should be terminated with no further
|
|
+ * action.
|
|
+ */
|
|
+ @Override
|
|
+ public void a() {
|
|
+ socket.channel().close().syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * Return a Minecraft compatible cipher instance from the specified key.
|
|
+ *
|
|
+ * @param opMode the mode to initialize the cipher in
|
|
+ * @param key to use as the initial vector
|
|
+ * @return the initialized cipher
|
|
+ */
|
|
+ public static Cipher getCipher(int opMode, Key key) {
|
|
+ try {
|
|
+ Cipher cip = Cipher.getInstance("AES/CFB8/NoPadding");
|
|
+ cip.init(opMode, key, new IvParameterSpec(key.getEncoded()));
|
|
+ return cip;
|
|
+ } catch (GeneralSecurityException ex) {
|
|
+ throw new RuntimeException(ex);
|
|
+ }
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/NettySocketAdaptor.java b/src/main/java/org/spigotmc/netty/NettySocketAdaptor.java
|
|
new file mode 100644
|
|
index 0000000..a3b86b8
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/NettySocketAdaptor.java
|
|
@@ -0,0 +1,248 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+import io.netty.channel.Channel;
|
|
+import io.netty.channel.ChannelOption;
|
|
+import java.io.IOException;
|
|
+import java.io.InputStream;
|
|
+import java.io.OutputStream;
|
|
+import java.net.InetAddress;
|
|
+import java.net.Socket;
|
|
+import java.net.SocketAddress;
|
|
+import java.net.SocketException;
|
|
+import java.nio.channels.SocketChannel;
|
|
+
|
|
+/**
|
|
+ * This class wraps a Netty {@link Channel} in a {@link Socket}. It overrides
|
|
+ * all methods in {@link Socket} to ensure that calls are not mistakingly made
|
|
+ * to the unsupported super socket. All operations that can be sanely applied to
|
|
+ * a {@link Channel} are implemented here. Those which cannot will throw an
|
|
+ * {@link UnsupportedOperationException}.
|
|
+ */
|
|
+public class NettySocketAdaptor extends Socket {
|
|
+
|
|
+ private final io.netty.channel.socket.SocketChannel ch;
|
|
+
|
|
+ private NettySocketAdaptor(io.netty.channel.socket.SocketChannel ch) {
|
|
+ this.ch = ch;
|
|
+ }
|
|
+
|
|
+ public static NettySocketAdaptor adapt(io.netty.channel.socket.SocketChannel ch) {
|
|
+ return new NettySocketAdaptor(ch);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void bind(SocketAddress bindpoint) throws IOException {
|
|
+ ch.bind(bindpoint).syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized void close() throws IOException {
|
|
+ ch.close().syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void connect(SocketAddress endpoint) throws IOException {
|
|
+ ch.connect(endpoint).syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void connect(SocketAddress endpoint, int timeout) throws IOException {
|
|
+ ch.config().setConnectTimeoutMillis(timeout);
|
|
+ ch.connect(endpoint).syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean equals(Object obj) {
|
|
+ return obj instanceof NettySocketAdaptor && ch.equals(((NettySocketAdaptor) obj).ch);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public SocketChannel getChannel() {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public InetAddress getInetAddress() {
|
|
+ return ch.remoteAddress().getAddress();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public InputStream getInputStream() throws IOException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean getKeepAlive() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.SO_KEEPALIVE);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public InetAddress getLocalAddress() {
|
|
+ return ch.localAddress().getAddress();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public int getLocalPort() {
|
|
+ return ch.localAddress().getPort();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public SocketAddress getLocalSocketAddress() {
|
|
+ return ch.localAddress();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean getOOBInline() throws SocketException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public OutputStream getOutputStream() throws IOException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public int getPort() {
|
|
+ return ch.remoteAddress().getPort();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized int getReceiveBufferSize() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.SO_RCVBUF);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public SocketAddress getRemoteSocketAddress() {
|
|
+ return ch.remoteAddress();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean getReuseAddress() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.SO_REUSEADDR);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized int getSendBufferSize() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.SO_SNDBUF);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public int getSoLinger() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.SO_LINGER);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized int getSoTimeout() throws SocketException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean getTcpNoDelay() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.TCP_NODELAY);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public int getTrafficClass() throws SocketException {
|
|
+ return ch.config().getOption(ChannelOption.IP_TOS);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public int hashCode() {
|
|
+ return ch.hashCode();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean isBound() {
|
|
+ return ch.localAddress() != null;
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean isClosed() {
|
|
+ return !ch.isOpen();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean isConnected() {
|
|
+ return ch.isActive();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean isInputShutdown() {
|
|
+ return ch.isInputShutdown();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public boolean isOutputShutdown() {
|
|
+ return ch.isOutputShutdown();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void sendUrgentData(int data) throws IOException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setKeepAlive(boolean on) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.SO_KEEPALIVE, on);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setOOBInline(boolean on) throws SocketException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setPerformancePreferences(int connectionTime, int latency, int bandwidth) {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized void setReceiveBufferSize(int size) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.SO_RCVBUF, size);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setReuseAddress(boolean on) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.SO_REUSEADDR, on);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized void setSendBufferSize(int size) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.SO_SNDBUF, size);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setSoLinger(boolean on, int linger) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.SO_LINGER, linger);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public synchronized void setSoTimeout(int timeout) throws SocketException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setTcpNoDelay(boolean on) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.TCP_NODELAY, on);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void setTrafficClass(int tc) throws SocketException {
|
|
+ ch.config().setOption(ChannelOption.IP_TOS, tc);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void shutdownInput() throws IOException {
|
|
+ throw new UnsupportedOperationException("Operation not supported on Channel wrapper.");
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void shutdownOutput() throws IOException {
|
|
+ ch.shutdownOutput().syncUninterruptibly();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public String toString() {
|
|
+ return ch.toString();
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/PacketDecoder.java b/src/main/java/org/spigotmc/netty/PacketDecoder.java
|
|
new file mode 100644
|
|
index 0000000..65074d2
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/PacketDecoder.java
|
|
@@ -0,0 +1,64 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+import io.netty.buffer.ByteBuf;
|
|
+import io.netty.buffer.ByteBufInputStream;
|
|
+import io.netty.channel.ChannelHandlerContext;
|
|
+import io.netty.handler.codec.ReplayingDecoder;
|
|
+import java.io.DataInputStream;
|
|
+import java.io.EOFException;
|
|
+import java.io.IOException;
|
|
+import net.minecraft.server.MinecraftServer;
|
|
+import net.minecraft.server.Packet;
|
|
+
|
|
+/**
|
|
+ * Packet decoding class backed by a reusable {@link DataInputStream} which
|
|
+ * backs the input {@link ByteBuf}. Reads an unsigned byte packet header and
|
|
+ * then decodes the packet accordingly.
|
|
+ */
|
|
+public class PacketDecoder extends ReplayingDecoder<ReadState> {
|
|
+
|
|
+ private DataInputStream input;
|
|
+ private Packet packet;
|
|
+
|
|
+ public PacketDecoder() {
|
|
+ super(ReadState.HEADER);
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public Packet decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
|
|
+ if (input == null) {
|
|
+ input = new DataInputStream(new ByteBufInputStream(in));
|
|
+ }
|
|
+
|
|
+ switch (state()) {
|
|
+ case HEADER:
|
|
+ short packetId = in.readUnsignedByte();
|
|
+ packet = Packet.a(MinecraftServer.getServer().getLogger(), packetId);
|
|
+ if (packet == null) {
|
|
+ throw new IOException("Bad packet id " + packetId);
|
|
+ }
|
|
+ checkpoint(ReadState.DATA);
|
|
+ case DATA:
|
|
+ try {
|
|
+ packet.a(input);
|
|
+ } catch (EOFException ex) {
|
|
+ return null;
|
|
+ }
|
|
+
|
|
+ checkpoint(ReadState.HEADER);
|
|
+ Packet ret = packet;
|
|
+ packet = null;
|
|
+
|
|
+ return ret;
|
|
+ default:
|
|
+ throw new IllegalStateException();
|
|
+ }
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void freeInboundBuffer(ChannelHandlerContext ctx) throws Exception {
|
|
+ super.freeInboundBuffer(ctx);
|
|
+ input = null;
|
|
+ packet = null;
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/PacketEncoder.java b/src/main/java/org/spigotmc/netty/PacketEncoder.java
|
|
new file mode 100644
|
|
index 0000000..e671a0d
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/PacketEncoder.java
|
|
@@ -0,0 +1,43 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+import io.netty.buffer.ByteBuf;
|
|
+import io.netty.buffer.ByteBufOutputStream;
|
|
+import io.netty.channel.ChannelHandlerContext;
|
|
+import io.netty.handler.codec.MessageToByteEncoder;
|
|
+import java.io.DataOutputStream;
|
|
+import net.minecraft.server.Packet;
|
|
+
|
|
+/**
|
|
+ * Netty encoder which takes a packet and encodes it, and adds a byte packet id
|
|
+ * header.
|
|
+ */
|
|
+public class PacketEncoder extends MessageToByteEncoder<Packet> {
|
|
+
|
|
+ private ByteBuf outBuf;
|
|
+ private DataOutputStream dataOut;
|
|
+
|
|
+ @Override
|
|
+ public void encode(ChannelHandlerContext ctx, Packet msg, ByteBuf out) throws Exception {
|
|
+ if (outBuf == null) {
|
|
+ outBuf = ctx.alloc().directBuffer();
|
|
+ }
|
|
+ if (dataOut == null) {
|
|
+ dataOut = new DataOutputStream(new ByteBufOutputStream(outBuf));
|
|
+ }
|
|
+
|
|
+ out.writeByte(msg.n());
|
|
+ msg.a(dataOut);
|
|
+ out.writeBytes(outBuf);
|
|
+ out.discardSomeReadBytes();
|
|
+ }
|
|
+
|
|
+ @Override
|
|
+ public void freeOutboundBuffer(ChannelHandlerContext ctx) throws Exception {
|
|
+ super.freeOutboundBuffer(ctx);
|
|
+ if (outBuf != null) {
|
|
+ outBuf.release();
|
|
+ outBuf = null;
|
|
+ }
|
|
+ dataOut = null;
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/PacketListener.java b/src/main/java/org/spigotmc/netty/PacketListener.java
|
|
new file mode 100644
|
|
index 0000000..8e3b932
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/PacketListener.java
|
|
@@ -0,0 +1,100 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+import com.google.common.base.Preconditions;
|
|
+import java.util.Arrays;
|
|
+import java.util.HashMap;
|
|
+import java.util.Map;
|
|
+import java.util.logging.Level;
|
|
+import net.minecraft.server.Connection;
|
|
+import net.minecraft.server.INetworkManager;
|
|
+import net.minecraft.server.Packet;
|
|
+import org.bukkit.Bukkit;
|
|
+import org.bukkit.plugin.Plugin;
|
|
+
|
|
+/**
|
|
+ * This class is used for plugins that wish to register to listen to incoming
|
|
+ * and outgoing packets. To use this class, simply create a new instance,
|
|
+ * override the methods you wish to use, and call
|
|
+ * {@link #register(org.spigotmc.netty.PacketListener, org.bukkit.plugin.Plugin)}.
|
|
+ */
|
|
+public class PacketListener {
|
|
+
|
|
+ /**
|
|
+ * A mapping of all registered listeners and their owning plugins.
|
|
+ */
|
|
+ private static final Map<PacketListener, Plugin> listeners = new HashMap<PacketListener, Plugin>();
|
|
+ /**
|
|
+ * A baked list of all listeners, for efficiency sake.
|
|
+ */
|
|
+ private static PacketListener[] baked = new PacketListener[0];
|
|
+
|
|
+ /**
|
|
+ * Used to register a handler for receiving notifications of packet
|
|
+ * activity.
|
|
+ *
|
|
+ * @param listener the listener to register
|
|
+ * @param plugin the plugin owning this listener
|
|
+ */
|
|
+ public static synchronized void register(PacketListener listener, Plugin plugin) {
|
|
+ Preconditions.checkNotNull(listener, "listener");
|
|
+ Preconditions.checkNotNull(plugin, "plugin");
|
|
+ Preconditions.checkState(!listeners.containsKey(listener), "listener already registered");
|
|
+
|
|
+ int size = listeners.size();
|
|
+ Preconditions.checkState(baked.length == size);
|
|
+ listeners.put(listener, plugin);
|
|
+ baked = Arrays.copyOf(baked, size + 1);
|
|
+ baked[size] = listener;
|
|
+ }
|
|
+
|
|
+ static Packet callReceived(INetworkManager networkManager, Connection connection, Packet packet) {
|
|
+ for (PacketListener listener : baked) {
|
|
+ try {
|
|
+ packet = listener.packetReceived(networkManager, connection, packet);
|
|
+ } catch (Throwable t) {
|
|
+ Bukkit.getServer().getLogger().log(Level.SEVERE, "Error whilst firing receive hook for packet", t);
|
|
+ }
|
|
+ }
|
|
+ return packet;
|
|
+ }
|
|
+
|
|
+ static Packet callQueued(INetworkManager networkManager, Connection connection, Packet packet) {
|
|
+ for (PacketListener listener : baked) {
|
|
+ try {
|
|
+ packet = listener.packetQueued(networkManager, connection, packet);
|
|
+ } catch (Throwable t) {
|
|
+ Bukkit.getServer().getLogger().log(Level.SEVERE, "Error whilst firing queued hook for packet", t);
|
|
+ }
|
|
+ }
|
|
+ return packet;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * Called when a packet has been received and is about to be handled by the
|
|
+ * current {@link Connection}. The returned packet will be the packet passed
|
|
+ * on for handling, or in the case of null being returned, not handled at
|
|
+ * all.
|
|
+ *
|
|
+ * @param networkManager the NetworkManager receiving the packet
|
|
+ * @param connection the connection which will handle the packet
|
|
+ * @param packet the received packet
|
|
+ * @return the packet to be handled, or null to cancel
|
|
+ */
|
|
+ public Packet packetReceived(INetworkManager networkManager, Connection connection, Packet packet) {
|
|
+ return packet;
|
|
+ }
|
|
+
|
|
+ /**
|
|
+ * Called when a packet is queued to be sent. The returned packet will be
|
|
+ * the packet sent. In the case of null being returned, the packet will not
|
|
+ * be sent.
|
|
+ *
|
|
+ * @param networkManager the NetworkManager which will send the packet
|
|
+ * @param connection the connection which queued the packet
|
|
+ * @param packet the queue packet
|
|
+ * @return the packet to be sent, or null if the packet will not be sent.
|
|
+ */
|
|
+ public Packet packetQueued(INetworkManager networkManager, Connection connection, Packet packet) {
|
|
+ return packet;
|
|
+ }
|
|
+}
|
|
diff --git a/src/main/java/org/spigotmc/netty/ReadState.java b/src/main/java/org/spigotmc/netty/ReadState.java
|
|
new file mode 100644
|
|
index 0000000..5dc3754
|
|
--- /dev/null
|
|
+++ b/src/main/java/org/spigotmc/netty/ReadState.java
|
|
@@ -0,0 +1,16 @@
|
|
+package org.spigotmc.netty;
|
|
+
|
|
+/**
|
|
+ * Stores the state of the packet currently being read.
|
|
+ */
|
|
+public enum ReadState {
|
|
+
|
|
+ /**
|
|
+ * Indicates the byte representing the ID has been read.
|
|
+ */
|
|
+ HEADER,
|
|
+ /**
|
|
+ * Shows the packet body is being read.
|
|
+ */
|
|
+ DATA;
|
|
+}
|
|
--
|
|
1.8.1-rc2
|
|
|