HAProxyTLV.java — netty Source File

Source Code

/*
 * Copyright 2016 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.
 */

package io.netty.handler.codec.haproxy;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.DefaultByteBufHolder;
import io.netty.util.internal.StringUtil;

import static io.netty.util.internal.ObjectUtil.*;

/**
 * A Type-Length Value (TLV vector) that can be added to the PROXY protocol
 * to include additional information like SSL information.
 *
 * @see HAProxySSLTLV
 */
public class HAProxyTLV extends DefaultByteBufHolder {

    private final Type type;
    private final byte typeByteValue;

    /**
     * The size of this tlv in bytes.
     * @return the number of bytes.
     */
    int totalNumBytes() {
        return 3 + contentNumBytes(); // type(1) + length(2) + content
    }

    int contentNumBytes() {
        return content().readableBytes();
    }

    /**
     * The registered types a TLV can have regarding the PROXY protocol 1.5 spec
     */
    public enum Type {
        PP2_TYPE_ALPN,
        PP2_TYPE_AUTHORITY,
        PP2_TYPE_SSL,
        PP2_TYPE_SSL_VERSION,
        PP2_TYPE_SSL_CN,
        PP2_TYPE_NETNS,
        /**
         * A TLV type that is not officially defined in the spec. May be used for nonstandard TLVs
         */
// ... (157 more lines)