79 lines
2.9 KiB
Java
79 lines
2.9 KiB
Java
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package net.minecraft.client.multiplayer;
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import com.google.common.base.Splitter;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.SimpleChannelInboundHandler;
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import java.util.List;
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import net.minecraft.client.multiplayer.resolver.ServerAddress;
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import net.minecraft.server.network.LegacyProtocolUtils;
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import net.minecraft.util.Mth;
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import net.minecraftforge.api.distmarker.Dist;
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import net.minecraftforge.api.distmarker.OnlyIn;
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@OnlyIn(Dist.CLIENT)
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public class LegacyServerPinger extends SimpleChannelInboundHandler<ByteBuf> {
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private static final Splitter SPLITTER = Splitter.on('\u0000').limit(6);
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private final ServerAddress address;
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private final LegacyServerPinger.Output output;
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public LegacyServerPinger(ServerAddress p_300035_, LegacyServerPinger.Output p_299531_) {
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this.address = p_300035_;
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this.output = p_299531_;
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}
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@Override
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public void channelActive(ChannelHandlerContext p_300254_) throws Exception {
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super.channelActive(p_300254_);
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ByteBuf bytebuf = p_300254_.alloc().buffer();
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try {
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bytebuf.writeByte(254);
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bytebuf.writeByte(1);
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bytebuf.writeByte(250);
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LegacyProtocolUtils.writeLegacyString(bytebuf, "MC|PingHost");
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int i = bytebuf.writerIndex();
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bytebuf.writeShort(0);
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int j = bytebuf.writerIndex();
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bytebuf.writeByte(127);
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LegacyProtocolUtils.writeLegacyString(bytebuf, this.address.getHost());
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bytebuf.writeInt(this.address.getPort());
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int k = bytebuf.writerIndex() - j;
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bytebuf.setShort(i, k);
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p_300254_.channel().writeAndFlush(bytebuf).addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
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} catch (Exception exception) {
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bytebuf.release();
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throw exception;
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}
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}
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protected void channelRead0(ChannelHandlerContext p_299467_, ByteBuf p_298668_) {
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short short1 = p_298668_.readUnsignedByte();
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if (short1 == 255) {
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String s = LegacyProtocolUtils.readLegacyString(p_298668_);
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List<String> list = SPLITTER.splitToList(s);
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if ("\u00a71".equals(list.get(0))) {
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int i = Mth.getInt(list.get(1), 0);
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String s1 = list.get(2);
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String s2 = list.get(3);
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int j = Mth.getInt(list.get(4), -1);
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int k = Mth.getInt(list.get(5), -1);
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this.output.handleResponse(i, s1, s2, j, k);
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}
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}
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p_299467_.close();
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext p_300590_, Throwable p_301394_) {
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p_300590_.close();
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}
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@FunctionalInterface
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@OnlyIn(Dist.CLIENT)
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public interface Output {
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void handleResponse(int p_297950_, String p_298283_, String p_299118_, int p_300225_, int p_298727_);
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}
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}
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