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Apache Dubbo Submodules:

Apache Dubbo includes a number of submodules with separate copyright notices
and license terms. Your use of these submodules is subject to the terms and
conditions of the following licenses.

For the package org.apache.dubbo.common.threadlocal and org.apache.dubbo.common.timer:

This product contains a modified portion of 'Netty', an event-driven asynchronous network application framework also
 under a "Apache License 2.0" license, see https://github.com/netty/netty/blob/4.1/LICENSE.txt:

 * io.netty.util.concurrent.FastThreadLocal
 * io.netty.util.internal.InternalThreadLocalMap
 * io.netty.util.Timer
 * io.netty.util.TimerTask
 * io.netty.util.Timeout
 * io.netty.util.HashedWheelTimer

For the org.apache.dubbo.common.utils.CIDRUtils :

This product contains a modified portion of 'edazdarevic.commons.net.CIDRUtils' published at
https://github.com/edazdarevic/CIDRUtils. The project is licensed under a MIT License:
    * The MIT License
    *
    * Copyright (c) 2013 Edin Dazdarevic (edin.dazdarevic@gmail.com)
    * Permission is hereby granted, free of charge, to any person obtaining a copy
    * of this software and associated documentation files (the "Software"), to deal
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    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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    * all copies or substantial portions of the Software.
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    * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    * THE SOFTWARE.

For the file org.apache.dubbo.common.utils.Utf8Utils.java:

This product contains a portion of the Protocol Buffers project, which is published at
https://developers.google.com/protocol-buffers/ and is licensed under the following License:

    Copyright 2008 Google Inc.  All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are
    met:

        * Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
        * Redistributions in binary form must reproduce the above
    copyright notice, this list of conditions and the following disclaimer
    in the documentation and/or other materials provided with the
    distribution.
        * Neither the name of Google Inc. nor the names of its
    contributors may be used to endorse or promote products derived from
    this software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    Code generated by the Protocol Buffer compiler is owned by the owner
    of the input file used when generating it.  This code is not
    standalone and requires a support library to be linked with it.  This
    support library is itself covered by the above license.

For the ca.proto in dubbo-registry-xds:

This product contains a modified portion of 'Istio', an open platform to connect, manage, and secure microservices also
 under a "Apache License 2.0" license, see https://github.com/istio/api/blob/master/LICENSE:

 * security/v1alpha1/ca.proto