/* * 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 java.util.List; import io.undertow.connector.PooledByteBuffer; import io.undertow.server.protocol.framed.SendFrameHeader; /** * //TODO: ack * * @author Stuart Douglas */ public class Http2SettingsStreamSinkChannel extends Http2StreamSinkChannel { private final List<Http2Setting> settings; Http2SettingsStreamSinkChannel(Http2Channel channel, List<Http2Setting> settings) { super(channel, 0); this.settings = settings; } /** * //an ack frame * * @param channel */ Http2SettingsStreamSinkChannel(Http2Channel channel) { super(channel, 0); this.settings = null; } @Override protected SendFrameHeader createFrameHeaderImpl() { PooledByteBuffer pooled = getChannel().getBufferPool().allocate(); ByteBuffer currentBuffer = pooled.getBuffer(); if (settings != null) { int size = settings.size() * 6; currentBuffer.put((byte) ((size >> 16) & 0xFF)); currentBuffer.put((byte) ((size >> 8) & 0xFF)); currentBuffer.put((byte) (size & 0xFF)); currentBuffer.put((byte) Http2Channel.FRAME_TYPE_SETTINGS); //type currentBuffer.put((byte) 0); //flags Http2ProtocolUtils.putInt(currentBuffer, getStreamId()); for (Http2Setting setting : settings) { currentBuffer.put((byte) ((setting.getId() >> 8) & 0xFF)); currentBuffer.put((byte) (setting.getId() & 0xFF)); currentBuffer.put((byte) ((setting.getValue() >> 24) & 0xFF)); currentBuffer.put((byte) ((setting.getValue() >> 16) & 0xFF)); currentBuffer.put((byte) ((setting.getValue() >> 8) & 0xFF)); currentBuffer.put((byte) (setting.getValue() & 0xFF)); } } else { currentBuffer.put((byte) 0); currentBuffer.put((byte) 0); currentBuffer.put((byte) 0); currentBuffer.put((byte) Http2Channel.FRAME_TYPE_SETTINGS); //type currentBuffer.put((byte) Http2Channel.SETTINGS_FLAG_ACK); //flags Http2ProtocolUtils.putInt(currentBuffer, getStreamId()); } currentBuffer.flip(); return new SendFrameHeader(pooled); } }