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Changes to ChannelRead

This commit is contained in:
LOOHP 2022-02-10 10:08:22 +00:00
parent 31b3a954a2
commit 67f24599f2
4 changed files with 117 additions and 94 deletions
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72
src/main/java/com/loohp/limbo/network/Channel.java
View File

@ -1,6 +1,5 @@
package com.loohp.limbo.network;
import com.loohp.limbo.network.protocol.packets.Packet;
import com.loohp.limbo.network.protocol.packets.PacketIn;
import com.loohp.limbo.network.protocol.packets.PacketOut;
import com.loohp.limbo.utils.DataTypeIO;
@ -10,24 +9,20 @@ import com.loohp.limbo.utils.Pair;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Stream;
public class Channel implements AutoCloseable {
private final ClientConnection clientConnection;
private final List<Pair<NamespacedKey, ChannelPacketHandler>> handlers;
private final AtomicBoolean valid;
protected DataOutputStream output;
protected DataInputStream input;
protected final DataInputStream input;
protected final DataOutputStream output;
public Channel(ClientConnection clientConnection, DataOutputStream output, DataInputStream input) {
this.clientConnection = clientConnection;
this.output = output;
public Channel(DataInputStream input, DataOutputStream output) {
this.input = input;
this.output = output;
this.handlers = new CopyOnWriteArrayList<>();
this.valid = new AtomicBoolean(true);
}
@ -54,55 +49,20 @@ public class Channel implements AutoCloseable {
return readPacket(-1);
}
protected PacketIn readPacket(int size) throws Exception {
protected PacketIn readPacket(int size) throws IOException {
PacketIn packet = null;
do {
ensureOpen();
size = size < 0 ? DataTypeIO.readVarInt(input) : size;
int packetId = DataTypeIO.readVarInt(input);
Class<? extends PacketIn> packetType;
switch (clientConnection.getClientState()) {
case HANDSHAKE:
packetType = Packet.getHandshakeIn().get(packetId);
break;
case STATUS:
packetType = Packet.getStatusIn().get(packetId);
break;
case LOGIN:
packetType = Packet.getLoginIn().get(packetId);
break;
case PLAY:
packetType = Packet.getPlayIn().get(packetId);
break;
default:
throw new IllegalStateException("Illegal ClientState!");
}
if (packetType == null) {
input.skipBytes(size - DataTypeIO.getVarIntLength(packetId));
} else {
Constructor<?>[] constructors = packetType.getConstructors();
Constructor<?> constructor = Stream.of(constructors).filter(each -> each.getParameterCount() > 0 && each.getParameterTypes()[0].equals(DataInputStream.class)).findFirst().orElse(null);
if (constructor == null) {
throw new NoSuchMethodException(packetType + " has no valid constructors!");
} else if (constructor.getParameterCount() == 1) {
packet = (PacketIn) constructor.newInstance(input);
} else if (constructor.getParameterCount() == 3) {
packet = (PacketIn) constructor.newInstance(input, size, packetId);
} else {
throw new NoSuchMethodException(packetType + " has no valid constructors!");
}
ChannelPacketRead read = new ChannelPacketRead(packetId, packet);
ChannelPacketRead read = new ChannelPacketRead(size, packetId, input);
for (Pair<NamespacedKey, ChannelPacketHandler> pair : handlers) {
read = pair.getSecond().read(read);
if (read == null) {
packet = null;
break;
}
packet = read.getPacket();
if (!packetType.isInstance(packet)) {
throw new IllegalStateException("Packet Handler \"" + pair.getFirst() + "\" changed the packet type illegally!");
}
}
packet = read.getReadPacket();
}
size = -1;
} while (packet == null);
@ -111,30 +71,12 @@ public class Channel implements AutoCloseable {
protected boolean writePacket(PacketOut packet) throws IOException {
ensureOpen();
int packetId;
switch (clientConnection.getClientState()) {
case STATUS:
packetId = Packet.getStatusOut().get(packet.getClass());
break;
case LOGIN:
packetId = Packet.getLoginOut().get(packet.getClass());
break;
case PLAY:
packetId = Packet.getPlayOut().get(packet.getClass());
break;
default:
throw new IllegalStateException("Illegal ClientState!");
}
Class<? extends PacketOut> packetType = packet.getClass();
ChannelPacketWrite write = new ChannelPacketWrite(packet);
for (Pair<NamespacedKey, ChannelPacketHandler> pair : handlers) {
write = pair.getSecond().write(write);
if (write == null) {
return false;
}
if (!packetType.isInstance(write.getPacket())) {
throw new IllegalStateException("Packet Handler \"" + pair.getFirst() + "\" changed the packet type illegally!");
}
}
packet = write.getPacket();
byte[] packetByte = packet.serializePacket();

28
src/main/java/com/loohp/limbo/network/ChannelPacketRead.java
View File

@ -2,14 +2,28 @@ package com.loohp.limbo.network;
import com.loohp.limbo.network.protocol.packets.PacketIn;
import java.io.DataInput;
public final class ChannelPacketRead {
private int size;
private int packetId;
private DataInput input;
private PacketIn packet;
protected ChannelPacketRead(int packetId, PacketIn packet) {
ChannelPacketRead(int size, int packetId, DataInput input) {
this.size = size;
this.packetId = packetId;
this.packet = packet;
this.input = input;
this.packet = null;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public int getPacketId() {
@ -20,7 +34,11 @@ public final class ChannelPacketRead {
this.packetId = packetId;
}
public PacketIn getPacket() {
public boolean hasReadPacket() {
return packet != null;
}
public PacketIn getReadPacket() {
return packet;
}
@ -28,4 +46,8 @@ public final class ChannelPacketRead {
this.packet = packet;
}
public DataInput getDataInput() {
return input;
}
}

2
src/main/java/com/loohp/limbo/network/ChannelPacketWrite.java
View File

@ -6,7 +6,7 @@ public final class ChannelPacketWrite {
private PacketOut packet;
protected ChannelPacketWrite(PacketOut packet) {
ChannelPacketWrite(PacketOut packet) {
this.packet = packet;
}

101
src/main/java/com/loohp/limbo/network/ClientConnection.java
View File

@ -10,6 +10,7 @@ import com.loohp.limbo.events.player.PlayerSelectedSlotChangeEvent;
import com.loohp.limbo.events.status.StatusPingEvent;
import com.loohp.limbo.file.ServerProperties;
import com.loohp.limbo.location.Location;
import com.loohp.limbo.network.protocol.packets.Packet;
import com.loohp.limbo.network.protocol.packets.PacketHandshakingIn;
import com.loohp.limbo.network.protocol.packets.PacketIn;
import com.loohp.limbo.network.protocol.packets.PacketLoginInLoginStart;
@ -60,6 +61,7 @@ import com.loohp.limbo.utils.ForwardingUtils;
import com.loohp.limbo.utils.GameMode;
import com.loohp.limbo.utils.MojangAPIUtils;
import com.loohp.limbo.utils.MojangAPIUtils.SkinResponse;
import com.loohp.limbo.utils.NamespacedKey;
import com.loohp.limbo.world.BlockPosition;
import com.loohp.limbo.world.World;
import net.kyori.adventure.text.Component;
@ -71,9 +73,11 @@ import org.json.simple.JSONArray;
import org.json.simple.JSONObject;
import org.json.simple.parser.JSONParser;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.net.InetAddress;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
@ -89,11 +93,14 @@ import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class ClientConnection extends Thread {
private static final NamespacedKey DEFAULT_HANDLER_NAMESPACE = new NamespacedKey("default");
private final Random random = new Random();
private final Socket client_socket;
private final Socket clientSocket;
protected Channel channel;
private boolean running;
private ClientState state;
@ -105,12 +112,12 @@ public class ClientConnection extends Thread {
private InetAddress inetAddress;
private boolean ready;
public ClientConnection(Socket client_socket) {
this.client_socket = client_socket;
this.inetAddress = client_socket.getInetAddress();
public ClientConnection(Socket clientSocket) {
this.clientSocket = clientSocket;
this.inetAddress = clientSocket.getInetAddress();
this.lastPacketTimestamp = new AtomicLong(-1);
this.lastKeepAlivePayLoad = new AtomicLong(-1);
this.channel = new Channel(this, null, null);
this.channel = null;
this.running = false;
this.ready = false;
}
@ -148,7 +155,7 @@ public class ClientConnection extends Thread {
}
public Socket getSocket() {
return client_socket;
return clientSocket;
}
public Channel getChannel() {
@ -180,7 +187,7 @@ public class ClientConnection extends Thread {
} catch (IOException ignored) {
}
try {
client_socket.close();
clientSocket.close();
} catch (IOException ignored) {
}
}
@ -196,27 +203,79 @@ public class ClientConnection extends Thread {
} catch (IOException ignored) {
}
try {
client_socket.close();
clientSocket.close();
} catch (IOException ignored) {
}
}
private void setChannel(DataInputStream input, DataOutputStream output) {
this.channel = new Channel(input, output);
this.channel.addHandlerBefore(DEFAULT_HANDLER_NAMESPACE, new ChannelPacketHandler() {
@Override
public ChannelPacketRead read(ChannelPacketRead read) {
if (read.hasReadPacket()) {
return super.read(read);
}
try {
DataInput input = read.getDataInput();
int size = read.getSize();
int packetId = read.getPacketId();
Class<? extends PacketIn> packetType;
switch (state) {
case HANDSHAKE:
packetType = Packet.getHandshakeIn().get(packetId);
break;
case STATUS:
packetType = Packet.getStatusIn().get(packetId);
break;
case LOGIN:
packetType = Packet.getLoginIn().get(packetId);
break;
case PLAY:
packetType = Packet.getPlayIn().get(packetId);
break;
default:
throw new IllegalStateException("Illegal ClientState!");
}
if (packetType == null) {
input.skipBytes(size - DataTypeIO.getVarIntLength(packetId));
return null;
}
Constructor<?>[] constructors = packetType.getConstructors();
Constructor<?> constructor = Stream.of(constructors).filter(each -> each.getParameterCount() > 0 && each.getParameterTypes()[0].equals(DataInputStream.class)).findFirst().orElse(null);
if (constructor == null) {
throw new NoSuchMethodException(packetType + " has no valid constructors!");
} else if (constructor.getParameterCount() == 1) {
read.setPacket((PacketIn) constructor.newInstance(input));
} else if (constructor.getParameterCount() == 3) {
read.setPacket((PacketIn) constructor.newInstance(input, size, packetId));
} else {
throw new NoSuchMethodException(packetType + " has no valid constructors!");
}
return super.read(read);
} catch (Exception e) {
throw new RuntimeException("Unable to read packet", e);
}
}
});
}
@SuppressWarnings("deprecation")
@Override
public void run() {
running = true;
state = ClientState.HANDSHAKE;
try {
client_socket.setKeepAlive(true);
channel.input = new DataInputStream(client_socket.getInputStream());
channel.output = new DataOutputStream(client_socket.getOutputStream());
clientSocket.setKeepAlive(true);
setChannel(new DataInputStream(clientSocket.getInputStream()), new DataOutputStream(clientSocket.getOutputStream()));
int handShakeSize = DataTypeIO.readVarInt(channel.input);
//legacy ping
if (handShakeSize == 0xFE) {
state = ClientState.LEGACY;
channel.output.writeByte(255);
String str = inetAddress.getHostName() + ":" + client_socket.getPort();
String str = inetAddress.getHostName() + ":" + clientSocket.getPort();
Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Legacy Status has pinged");
ServerProperties p = Limbo.getInstance().getServerProperties();
StatusPingEvent event = Limbo.getInstance().getEventsManager().callEvent(new StatusPingEvent(this, p.getVersionString(), p.getProtocol(), p.getMotd(), p.getMaxPlayers(), Limbo.getInstance().getPlayers().size(), p.getFavicon().orElse(null)));
@ -226,7 +285,7 @@ public class ClientConnection extends Thread {
channel.output.write(bytes);
channel.close();
client_socket.close();
clientSocket.close();
state = ClientState.DISCONNECTED;
}
@ -243,10 +302,10 @@ public class ClientConnection extends Thread {
switch (handshake.getHandshakeType()) {
case STATUS:
state = ClientState.STATUS;
while (client_socket.isConnected()) {
while (clientSocket.isConnected()) {
PacketIn packetIn = channel.readPacket();
if (packetIn instanceof PacketStatusInRequest) {
String str = inetAddress.getHostName() + ":" + client_socket.getPort();
String str = inetAddress.getHostName() + ":" + clientSocket.getPort();
if (Limbo.getInstance().getServerProperties().handshakeVerboseEnabled()) {
Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Handshake Status has pinged");
}
@ -302,7 +361,7 @@ public class ClientConnection extends Thread {
}
int messageId = this.random.nextInt();
while (client_socket.isConnected()) {
while (clientSocket.isConnected()) {
PacketIn packetIn = channel.readPacket();
if (packetIn instanceof PacketLoginInLoginStart) {
PacketLoginInLoginStart start = (PacketLoginInLoginStart) packetIn;
@ -367,7 +426,7 @@ public class ClientConnection extends Thread {
}
} catch (Exception e) {
channel.close();
client_socket.close();
clientSocket.close();
state = ClientState.DISCONNECTED;
}
@ -401,7 +460,7 @@ public class ClientConnection extends Thread {
PacketPlayOutPlayerAbilities abilities = new PacketPlayOutPlayerAbilities(0.05F, 0.1F, flags.toArray(new PlayerAbilityFlags[flags.size()]));
sendPacket(abilities);
String str = inetAddress.getHostName() + ":" + client_socket.getPort() + "|" + player.getName() + "(" + player.getUniqueId() + ")";
String str = inetAddress.getHostName() + ":" + clientSocket.getPort() + "|" + player.getName() + "(" + player.getUniqueId() + ")";
Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Player had connected to the Limbo server!");
PacketPlayOutDeclareCommands declare = DeclareCommands.getDeclareCommandsPacket(player);
@ -465,7 +524,7 @@ public class ClientConnection extends Thread {
};
new Timer().schedule(keepAliveTask, 5000, 10000);
while (client_socket.isConnected()) {
while (clientSocket.isConnected()) {
try {
CheckedBiConsumer<PlayerMoveEvent, Location, IOException> processMoveEvent = (event, originalTo) -> {
if (event.isCancelled()) {
@ -565,7 +624,7 @@ public class ClientConnection extends Thread {
Limbo.getInstance().getEventsManager().callEvent(new PlayerQuitEvent(player));
str = inetAddress.getHostName() + ":" + client_socket.getPort() + "|" + player.getName();
str = inetAddress.getHostName() + ":" + clientSocket.getPort() + "|" + player.getName();
Limbo.getInstance().getConsole().sendMessage("[/" + str + "] <-> Player had disconnected!");
}
@ -575,7 +634,7 @@ public class ClientConnection extends Thread {
try {
channel.close();
client_socket.close();
clientSocket.close();
} catch (Exception ignored) {
}
state = ClientState.DISCONNECTED;