mirror of
https://github.com/GeyserMC/Geyser.git
synced 2024-08-14 23:57:35 +00:00
87 lines
3 KiB
Java
87 lines
3 KiB
Java
/*
|
|
* Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* @author GeyserMC
|
|
* @link https://github.com/GeyserMC/Geyser
|
|
*/
|
|
|
|
package org.geysermc.geyser.util;
|
|
|
|
import com.github.steveice10.mc.protocol.packet.ingame.serverbound.ServerboundCustomPayloadPacket;
|
|
import com.google.common.base.Charsets;
|
|
import org.geysermc.geyser.GeyserImpl;
|
|
import org.geysermc.geyser.session.GeyserSession;
|
|
|
|
import java.nio.ByteBuffer;
|
|
|
|
public class PluginMessageUtils {
|
|
private static final byte[] GEYSER_BRAND_DATA;
|
|
|
|
static {
|
|
byte[] data = GeyserImpl.NAME.getBytes(Charsets.UTF_8);
|
|
GEYSER_BRAND_DATA =
|
|
ByteBuffer.allocate(data.length + getVarIntLength(data.length))
|
|
.put(writeVarInt(data.length))
|
|
.put(data)
|
|
.array();
|
|
}
|
|
|
|
/**
|
|
* Get the prebuilt brand as a byte array
|
|
*
|
|
* @return the brand information of the Geyser client
|
|
*/
|
|
public static byte[] getGeyserBrandData() {
|
|
return GEYSER_BRAND_DATA;
|
|
}
|
|
|
|
public static void sendMessage(GeyserSession session, String channel, byte[] data) {
|
|
session.sendDownstreamPacket(new ServerboundCustomPayloadPacket(channel, data));
|
|
}
|
|
|
|
private static byte[] writeVarInt(int value) {
|
|
byte[] data = new byte[getVarIntLength(value)];
|
|
int index = 0;
|
|
do {
|
|
byte temp = (byte) (value & 0b01111111);
|
|
value >>>= 7;
|
|
if (value != 0) {
|
|
temp |= 0b10000000;
|
|
}
|
|
data[index] = temp;
|
|
index++;
|
|
} while (value != 0);
|
|
return data;
|
|
}
|
|
|
|
private static int getVarIntLength(int number) {
|
|
if ((number & 0xFFFFFF80) == 0) {
|
|
return 1;
|
|
} else if ((number & 0xFFFFC000) == 0) {
|
|
return 2;
|
|
} else if ((number & 0xFFE00000) == 0) {
|
|
return 3;
|
|
} else if ((number & 0xF0000000) == 0) {
|
|
return 4;
|
|
}
|
|
return 5;
|
|
}
|
|
}
|