/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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
*
* http://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.
*/
package io.undertow.protocols.http2;
import java.nio.ByteBuffer;
import io.undertow.server.protocol.framed.SendFrameHeader;
import io.undertow.util.ImmediatePooledByteBuffer;
/**
* A window update frame.
*
* @author Stuart Douglas
*/
class Http2WindowUpdateStreamSinkChannel extends Http2NoDataStreamSinkChannel {
//length (4) and frame type. There are never any flags
public static final int HEADER_FIRST_LINE = (4 << 8) | (Http2Channel.FRAME_TYPE_WINDOW_UPDATE);
private final int streamId;
private final int deltaWindowSize;
protected Http2WindowUpdateStreamSinkChannel(Http2Channel channel, int streamId, int deltaWindowSize) {
super(channel);
this.streamId = streamId;
this.deltaWindowSize = deltaWindowSize;
}
@Override
protected SendFrameHeader createFrameHeader() {
ByteBuffer buf = ByteBuffer.allocate(13);
Http2ProtocolUtils.putInt(buf, HEADER_FIRST_LINE);
buf.put((byte)0);
Http2ProtocolUtils.putInt(buf, streamId);
Http2ProtocolUtils.putInt(buf, deltaWindowSize);
buf.flip();
return new SendFrameHeader(new ImmediatePooledByteBuffer(buf));
}
}