49 lines
1.8 KiB
Java
49 lines
1.8 KiB
Java
/*
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* This file is part of ViaProxy - https://github.com/RaphiMC/ViaProxy
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* Copyright (C) 2021-2024 RK_01/RaphiMC and contributors
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package net.raphimc.viaproxy.proxy.util;
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import io.netty.channel.Channel;
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import io.netty.util.AttributeKey;
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import java.util.Stack;
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public class ChannelUtil {
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private static final AttributeKey<Stack<Boolean>> LAST_AUTO_READ = AttributeKey.valueOf("last-auto-read");
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public static void disableAutoRead(final Channel channel) {
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if (channel.attr(LAST_AUTO_READ).get() == null) {
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channel.attr(LAST_AUTO_READ).set(new Stack<>());
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}
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channel.attr(LAST_AUTO_READ).get().push(channel.config().isAutoRead());
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channel.config().setAutoRead(false);
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}
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public static void restoreAutoRead(final Channel channel) {
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if (channel.attr(LAST_AUTO_READ).get() == null) {
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throw new IllegalStateException("Tried to restore auto read, but it was never disabled");
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}
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if (channel.config().isAutoRead()) {
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throw new IllegalStateException("Race condition detected: Auto read has been enabled somewhere else");
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}
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channel.config().setAutoRead(channel.attr(LAST_AUTO_READ).get().pop());
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}
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}
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