org.apache.hbase.thirdparty.io.netty.handler.codec.http2.Http2MaxRstFrameListener Maven / Gradle / Ivy
/*
* Copyright 2023 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
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package org.apache.hbase.thirdparty.io.netty.handler.codec.http2;
import org.apache.hbase.thirdparty.io.netty.channel.ChannelHandlerContext;
import org.apache.hbase.thirdparty.io.netty.util.internal.logging.InternalLogger;
import org.apache.hbase.thirdparty.io.netty.util.internal.logging.InternalLoggerFactory;
import java.util.concurrent.TimeUnit;
final class Http2MaxRstFrameListener extends Http2FrameListenerDecorator {
private static final InternalLogger logger = InternalLoggerFactory.getInstance(Http2MaxRstFrameListener.class);
private static final Http2Exception RST_FRAME_RATE_EXCEEDED = Http2Exception.newStatic(Http2Error.ENHANCE_YOUR_CALM,
"Maximum number of RST frames reached",
Http2Exception.ShutdownHint.HARD_SHUTDOWN, Http2MaxRstFrameListener.class, "onRstStreamRead(..)");
private final long nanosPerWindow;
private final int maxRstFramesPerWindow;
private long lastRstFrameNano = System.nanoTime();
private int receivedRstInWindow;
Http2MaxRstFrameListener(Http2FrameListener listener, int maxRstFramesPerWindow, int secondsPerWindow) {
super(listener);
this.maxRstFramesPerWindow = maxRstFramesPerWindow;
this.nanosPerWindow = TimeUnit.SECONDS.toNanos(secondsPerWindow);
}
@Override
public void onRstStreamRead(ChannelHandlerContext ctx, int streamId, long errorCode) throws Http2Exception {
long currentNano = System.nanoTime();
if (currentNano - lastRstFrameNano >= nanosPerWindow) {
lastRstFrameNano = currentNano;
receivedRstInWindow = 1;
} else {
receivedRstInWindow++;
if (receivedRstInWindow > maxRstFramesPerWindow) {
logger.debug("{} Maximum number {} of RST frames reached within {} seconds, " +
"closing connection with {} error", ctx.channel(), maxRstFramesPerWindow,
TimeUnit.NANOSECONDS.toSeconds(nanosPerWindow), RST_FRAME_RATE_EXCEEDED.error(),
RST_FRAME_RATE_EXCEEDED);
throw RST_FRAME_RATE_EXCEEDED;
}
}
super.onRstStreamRead(ctx, streamId, errorCode);
}
}