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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">

<chapter>
  <header>
    <copyright>
      <year>2000</year><year>2017</year>
      <holder>Ericsson AB. All Rights Reserved.</holder>
    </copyright>
    <legalnotice>
      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.

    </legalnotice>

    <title>Megaco Release Notes</title>
    <prepared>Lars Thors&eacute;n, H&aring;kan Mattsson, Micael Karlberg</prepared>
    <docno></docno>
    <date></date>
    <rev>%VSN%</rev>
    <file>notes.xml</file>
  </header>
  <p>This document describes the changes made to the Megaco system
  from version to version. The intention of this document is to
  list all incompatibilities as well as all enhancements and
  bugfixes for every release of Megaco. Each release of Megaco
  thus constitutes one section in this document. The title of each
  section is the version number of Megaco.</p>


  <section><title>Megaco 3.18.4</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Improved documentation.</p>
          <p>
	    Own Id: OTP-15190</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.18.3</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
	    <p> Removed all old unused files in the documentation.
	    </p>
          <p>
	    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493 </p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.18.2</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Typos have been fixed.</p>
          <p>
	    Own Id: OTP-14387</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.18.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Internal changes</p>
          <p>
	    Own Id: OTP-13551</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.18</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> The runtime dependencies in the application resource
	    file have been updated. </p>
          <p>
	    Own Id: OTP-12762</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.17.3</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
          <p>
	    Distribute <c>autoconf</c> helpers to applications at
	    build time instead of having multiple identical copies
	    committed in the repository.</p>
          <p>
	    Own Id: OTP-12348</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.17.2</title>

    <section><title>Fixed Bugs and Malfunctions</title>
      <list>
        <item>
          <p>
	    Implement --enable-sanitizers[=sanitizers]. Similar to
	    debugging with Valgrind, it's very useful to enable
	    -fsanitize= switches to catch bugs at runtime.</p>
          <p>
	    Own Id: OTP-12153</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.17.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> The default encoding of Erlang files has been changed
	    from ISO-8859-1 to UTF-8. </p> <p> The encoding of XML
	    files has also been changed to UTF-8. </p>
          <p>
	    Own Id: OTP-10907</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.17.0.3</title>

    <section><title>Improvements and New Features</title>
    <list>
      <item>
	<p>Updated doc files to utf8.</p>
	<p>Own Id: OTP-10907</p>
      </item>
    </list>
    </section>

  </section>

  <section><title>Megaco 3.17.0.2</title>

    <section><title>Improvements and New Features</title>
    <list>
      <item>
	<p>
	  Introduced functionality for inspection of system and
	build configuration.</p>
	<p>
	Own Id: OTP-11196</p>
      </item>
    </list>
    </section>

  </section>

  <section><title>Megaco 3.17.0.1</title>

    <section><title>Improvements and New Features</title>
      <list>
        <item>
	    <p> Postscript files no longer needed for the generation
	    of PDF files have been removed. </p>
          <p>
	    Own Id: OTP-11016</p>
        </item>
      </list>
    </section>

</section>

<section><title>Megaco 3.17</title>

    <p>Version 3.17 supports code replacement in runtime from/to
      version 3.16.0.3 and and 3.16.0.2. </p>

    <section>
      <title>Improvements and new features</title>

      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>Allow whitespaces in installation path. </p>
          <p>It is now possible to give configure and make an
	  installation/release path with whitespaces in it. </p>
          <p>Own Id: OTP-10107</p>
        </item>

     </list>
-->

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

 <!--
      <p>-</p>
 -->

      <list type="bulleted">
	<item>
          <p>Buffer overrun error while flex scanner processing
	  property parm groups. </p>
          <p>This error occured only for large messages if a
	  buffer realloc was needed while processing the
	  property parm groups. </p>
          <p>Own Id: OTP-10998</p>
          <p>Aux Id: Seq 12263</p>
	</item>

      </list>

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
	  <p>A number of binary encoding alternatives has been removed.
	  The binary encoding option <c>driver</c> has been removed
	  since this (the use of the asn1 linked in driver) is
	  now default and there is now way to <em>not</em> use it.
	  See <seealso marker="megaco_encode#binary_config">configuration of binary encoding</seealso> for more info. </p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.17 -->


  <section><title>Megaco 3.16.0.3</title>

    <p>Version 3.16.0.2 supports code replacement in runtime from/to
      version 3.16.0.1, 3.16, 3.15.1.1, 3.15.1 and 3.15.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
	  <p>Where necessary, a comment stating encoding has been
	  added to Erlang files. The comment is meant to be removed
	  in Erlang/OTP R17B when UTF-8 becomes the default encoding. </p>
	  <p>Own Id: OTP-10630</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

      <p>-</p>

 <!--
      <list type="bulleted">
	<item>
	  <p>Fixing miscellaneous things detected by dialyzer. </p>
	  <p>Own Id: OTP-9075</p>
	</item>

      </list>
 -->

    </section>

    <section>
      <title>Incompatibilities</title>
<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
	  <p>A number of binary encoding alternatives has been removed.
	  The binary encoding option <c>driver</c> has been removed
	  since this (the use of the asn1 linked in driver) is
	  now default and there is now way to <em>not</em> use it.
	  See <seealso marker="megaco_encode#binary_config">configuration of binary encoding</seealso> for more info. </p>
        </item>

      </list>

    </section>

  </section> <!-- 3.16.0.3 -->


  <section><title>Megaco 3.16.0.2</title>

    <p>Version 3.16.0.2 supports code replacement in runtime from/to
      version 3.16.0.1, 3.16, 3.15.1.1, 3.15.1 and 3.15.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Allow whitespaces in installation path. </p>
          <p>It is now possible to give configure and make an
	  installation/release path with whitespaces in it. </p>
          <p>Own Id: OTP-10107</p>
        </item>

        <item>
          <p>Fix parallel make for behaviours. </p>
        </item>

        <item>
          <p>Removed use of deprecated system flag,
	  <c>global_haeps_size</c>, in the measurement tool
	  <c>mstone1</c>. </p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

      <p>-</p>

 <!--
      <list type="bulleted">
	<item>
	  <p>Fixing miscellaneous things detected by dialyzer. </p>
	  <p>Own Id: OTP-9075</p>
	</item>

      </list>
 -->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
	  <p>Due to the change in the flex driver API,
	  we may no longer be able to build and/or use
	  the flex driver without reentrant support. </p>
          <p>Own Id: OTP-9795</p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.16.0.2 -->


  <section><title>Megaco 3.16.0.1</title>

    <p>Version 3.16.0.1 supports code replacement in runtime from/to
      version 3.16, 3.15.1.1, 3.15.1 and 3.15.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
	  <p>Fixed some faulty test cases. </p>
<!--
          <p>Own Id: OTP-9795</p>
-->
        </item>

        <item>
          <p>Removed use of deprecated system flag,
	  <c>scheduler_bind_type</c>, in the measurement tool
	  <c>mstone1</c>. </p>
          <p>Own Id: OTP-9949</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

      <p>-</p>

 <!--
      <list type="bulleted">
	<item>
	  <p>Fixing miscellaneous things detected by dialyzer. </p>
	  <p>Own Id: OTP-9075</p>
	</item>

      </list>
 -->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
	  <p>Due to the change in the flex driver API,
	  we may no longer be able to build and/or use
	  the flex driver without reentrant support. </p>
          <p>Own Id: OTP-9795</p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.16.0.1 -->


  <section><title>Megaco 3.16</title>

    <p>Version 3.16 supports code replacement in runtime from/to
      version 3.15.1.1, 3.15.1 and 3.15.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Minor improvements to the measurement tool <c>mstone1</c>. </p>
          <p>Own Id: OTP-9604</p>
        </item>

        <item>
	  <p>ASN.1 no longer makes use of a driver to accelerate encode/decode,
	  instead it uses NIFs. The encoding config option is <em>still</em>
	  the same, i.e. <c>driver</c>. </p>
          <p>Own Id: OTP-9672</p>
        </item>

        <item>
	  <p>The profiling test tool has been rewritten. </p>
	  <p>H&aring;kan Mattsson</p>
          <p>Own Id: OTP-9679</p>
        </item>

        <item>
	  <p>The flex driver has been updated to support the new driver format
	  (changed to enable 64-bit aware drivers). </p>
          <p>Own Id: OTP-9795</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

      <p>-</p>

 <!--
      <list type="bulleted">
	<item>
	  <p>Fixing miscellaneous things detected by dialyzer. </p>
	  <p>Own Id: OTP-9075</p>
	</item>

      </list>
 -->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
	  <p>Due to the change in the flex driver API,
	  we may no longer be able to build and/or use
	  the flex driver without reentrant support. </p>
          <p>Own Id: OTP-9795</p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.16 -->


  <section><title>Megaco 3.15.1.1</title>

    <p>Version 3.15.1.1 supports code replacement in runtime from/to
      version 3.15.1 and 3.15.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Correct various XML errors. </p>
          <p>Own Id: OTP-9550</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

      <p>-</p>

 <!--
      <list type="bulleted">
	<item>
	  <p>Fixing miscellaneous things detected by dialyzer. </p>
	  <p>Own Id: OTP-9075</p>
	</item>

      </list>
 -->

    </section>

  </section> <!-- 3.15.1.1 -->


  <section><title>Megaco 3.15.1</title>

    <p>Version 3.15.1 supports code replacement in runtime from/to
      version 3.15, 3.14.1.1, 3.14.1 and 3.14.</p>

    <section>
      <title>Improvements and new features</title>

      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>Updated the
            <seealso marker="megaco_performance">performance</seealso>
            chapter. </p>
          <p>Own Id: OTP-8696</p>
        </item>

     </list>
-->

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Fixing miscellaneous things detected by dialyzer. </p>
          <p>Own Id: OTP-9075</p>
	  <!-- <p>Aux Id: Seq 11579</p> -->
        </item>

      </list>

    </section>

  </section> <!-- 3.15.1 -->


  <section><title>Megaco 3.15</title>

    <section><title>Improvements and New Features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Fixing auto-import issues.</p>
          <p>Own Id: OTP-8842</p>
        </item>
      </list>
    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>Eliminated a possible race condition while creating
            pending counters. </p>
          <p>Own Id: OTP-8634</p>
	  <p>Aux Id: Seq 11579</p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.15 -->


  <section>
    <title>Megaco 3.14.1.1</title>

    <p>Version 3.14.1.1 supports code replacement in runtime from/to
      version 3.14.1, 3.14, 3.13, 3.12 and 3.11.3.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Updated the
            <seealso marker="megaco_performance">performance</seealso>
            chapter. </p>
          <p>Own Id: OTP-8696</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>A race condition when, during high load, processing
            both the original and a resent message and delivering
            this as two separate messages to the user. </p>
          <p>Note that this solution only protects against multiple
            reply deliveries! </p>
          <p>Own Id: OTP-8529</p>
          <p>Aux Id: Seq 10915</p>
        </item>

        <item>
          <p>Fix shared libraries installation. </p>
          <p>The flex shared lib(s) were incorrectly installed as data
            files. </p>
          <p>Peter Lemenkov</p>
          <p>Own Id: OTP-8627</p>
        </item>

        <item>
          <p>Eliminated a possible race condition while creating
            pending counters. </p>
          <p>Own Id: OTP-8634</p>
	  <p>Aux Id: Seq 11579</p>
        </item>

      </list>
-->

    </section>

  </section> <!-- 3.14.1.1 -->


  <section>
    <title>Megaco 3.14.1</title>

    <p>Version 3.14.1 supports code replacement in runtime from/to
      version 3.14, 3.13, 3.12 and 3.11.3.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>A minor compiler related performance improvement. </p>
          <p>Own Id: OTP-8561</p>
        </item>

     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>
<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>A race condition when, during high load, processing
            both the original and a resent message and delivering
            this as two separate messages to the user. </p>
          <p>Note that this solution only protects against multiple
            reply deliveries! </p>
          <p>Own Id: OTP-8529</p>
          <p>Aux Id: Seq 10915</p>
        </item>

        <item>
          <p>Fix shared libraries installation. </p>
          <p>The flex shared lib(s) were incorrectly installed as data
            files. </p>
          <p>Peter Lemenkov</p>
          <p>Own Id: OTP-8627</p>
        </item>

        <item>
          <p>Eliminated a possible race condition while creating
            pending counters. </p>
          <p>Own Id: OTP-8634</p>
	  <p>Aux Id: Seq 11579</p>
        </item>

      </list>

    </section>

  </section> <!-- 3.14.1 -->


  <section>
    <title>Megaco 3.14</title>

    <p>Version 3.14 supports code replacement in runtime from/to
      version 3.13, 3.12 and 3.11.3.</p>

    <section>
      <title>Improvements and new features</title>

<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Various changes to configure and makefile(s) to facilitate cross
            compilation (and other build system improvements). </p>
          <p>Own Id: OTP-8323</p>
        </item>

        <item>
          <p>Added a help target in the test Makefile to explain
            the most useful make targets, used when testing the
            application using the test-server provided with megaco.</p>
          <p>Own Id: OTP-8362</p>
        </item>

        <item>
          <p>Adapted megaco_filter to the new internal format.</p>
          <p>Own Id: OTP-8403</p>
        </item>
     </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>
<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>Callbacks, when the callback module is unknown (undefined),
            results in warning messages. </p>
          <p>A race condition scenario. As part of a cancelation operation,
            replies with waiting acknowledgements is cancelled. This includes
            informing the user (via a call to the handle_trans_ack callback
            function). It is possible that at this point the connection data
            has been removed, which makes it impossible for megaco to
            perform this operation, resulting in the warning message. The
            solution is to also store the callback module with the other
            reply information, to be used when cleaning up after a
            cancelation. </p>
          <p>Own Id: OTP-8328</p>
	  <p>Aux Id: Seq 11384</p>
        </item>

      </list>

    </section>

  </section> <!-- 3.14 -->


  <section>
    <title>Megaco 3.13</title>

    <p>Version 3.13 supports code replacement in runtime from/to
      version 3.12 and 3.11.3.</p>

    <section>
      <title>Improvements and new features</title>
<!--
      <p>-</p>
-->

      <list type="bulleted">
        <item>
          <p>A minor optimization by using ets:update_element
            instead of ets:insert for some table updates.</p>
          <p>Own Id: OTP-8239</p>
	  <!-- <p>Aux Id: Seq 11332</p> -->
        </item>

        <item>
          <p>The documentation is now built with open source tools
            (<em>xsltproc</em> and <em>fop</em>) that exists on most
            platforms. One visible change is that the frames are removed.</p>
          <p>Own Id: OTP-8249</p>
        </item>

      </list>

    </section>

    <section>
      <title>Fixed bugs and malfunctions</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>Replacing obsolete guard tests.</p>
          <p>Own Id: OTP-8164</p>
	  <p>Aux Id: Seq 11332</p>
        </item>

      </list>
-->

    </section>

    <section>
      <title>Incompatibilities</title>
      <p>-</p>

<!--
      <list type="bulleted">
        <item>
          <p>For those implementing their own codec's, the new megaco_encoder
            behaviour will require three more functions. See above for more
            info. </p>
          <p>Own Id: OTP-7168</p>
	  <p>Aux Id: Seq 10867</p>
        </item>

      </list>
-->

    </section>
  </section> <!-- 3.13 -->

</chapter>