User's Guide
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Megaco/H.248
Release Notes
Version 3.18

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Chapters

- Megaco Release Notes
  - Top of chapter
  - Megaco 3.18
  - Megaco 3.17.3
  - Megaco 3.17.2
  - Megaco 3.17.1
  - Megaco 3.17.0.3
  - Megaco 3.17.0.2
  - Megaco 3.17.0.1
  - Megaco 3.17
  - Megaco 3.16.0.3
  - Megaco 3.16.0.2
  - Megaco 3.16.0.1
  - Megaco 3.16
  - Megaco 3.15.1.1
  - Megaco 3.15.1
  - Megaco 3.15
  - Megaco 3.14.1.1
  - Megaco 3.14.1
  - Megaco 3.14
  - Megaco 3.13

# 1 Megaco Release Notes

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.

### 1.1 Megaco 3.18

#### Improvements and New Features

- The runtime dependencies in the application resource file have been updated.

  Own Id: OTP-12762

### 1.2 Megaco 3.17.3

#### Improvements and New Features

- Distribute autoconf helpers to applications at build time instead of having multiple identical copies committed in the repository.

  Own Id: OTP-12348

### 1.3 Megaco 3.17.2

#### Fixed Bugs and Malfunctions

- Implement --enable-sanitizers[=sanitizers]. Similar to debugging with Valgrind, it's very useful to enable -fsanitize= switches to catch bugs at runtime.

  Own Id: OTP-12153

### 1.4 Megaco 3.17.1

#### Improvements and New Features

- The default encoding of Erlang files has been changed from ISO-8859-1 to UTF-8.

  The encoding of XML files has also been changed to UTF-8.

  Own Id: OTP-10907

### 1.5 Megaco 3.17.0.3

#### Improvements and New Features

- Updated doc files to utf8.

  Own Id: OTP-10907

### 1.6 Megaco 3.17.0.2

#### Improvements and New Features

- Introduced functionality for inspection of system and build configuration.

  Own Id: OTP-11196

### 1.7 Megaco 3.17.0.1

#### Improvements and New Features

- Postscript files no longer needed for the generation of PDF files have been removed.

  Own Id: OTP-11016

### 1.8 Megaco 3.17

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

#### Improvements and new features

-

#### Fixed bugs and malfunctions

- Buffer overrun error while flex scanner processing property parm groups.

  This error occured only for large messages if a buffer realloc was needed while processing the property parm groups.

  Own Id: OTP-10998

  Aux Id: Seq 12263

#### Incompatibilities

-

### 1.9 Megaco 3.16.0.3

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.

#### Improvements and new features

- 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.

  Own Id: OTP-10630

#### Fixed bugs and malfunctions

-

#### Incompatibilities

- A number of binary encoding alternatives has been removed. The binary encoding option driver has been removed since this (the use of the asn1 linked in driver) is now default and there is now way to not use it. See configuration of binary encoding for more info.

### 1.10 Megaco 3.16.0.2

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.

#### Improvements and new features

- Allow whitespaces in installation path.

  It is now possible to give configure and make an installation/release path with whitespaces in it.

  Own Id: OTP-10107

- Fix parallel make for behaviours.

- Removed use of deprecated system flag, global_haeps_size, in the measurement tool mstone1.

#### Fixed bugs and malfunctions

-

#### Incompatibilities

-

### 1.11 Megaco 3.16.0.1

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.

#### Improvements and new features

- Fixed some faulty test cases.

- Removed use of deprecated system flag, scheduler_bind_type, in the measurement tool mstone1.

  Own Id: OTP-9949

#### Fixed bugs and malfunctions

-

#### Incompatibilities

-

### 1.12 Megaco 3.16

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

#### Improvements and new features

- Minor improvements to the measurement tool mstone1.

  Own Id: OTP-9604

- ASN.1 no longer makes use of a driver to accelerate encode/decode, instead it uses NIFs. The encoding config option is still the same, i.e. driver.

  Own Id: OTP-9672

- The profiling test tool has been rewritten.

  Håkan Mattsson

  Own Id: OTP-9679

- The flex driver has been updated to support the new driver format (changed to enable 64-bit aware drivers).

  Own Id: OTP-9795

#### Fixed bugs and malfunctions

-

#### Incompatibilities

-

### 1.13 Megaco 3.15.1.1

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

#### Improvements and new features

- Correct various XML errors.

  Own Id: OTP-9550

#### Fixed bugs and malfunctions

-

### 1.14 Megaco 3.15.1

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

#### Improvements and new features

-

#### Fixed bugs and malfunctions

- Fixing miscellaneous things detected by dialyzer.

  Own Id: OTP-9075

### 1.15 Megaco 3.15

#### Improvements and New Features

- Fixing auto-import issues.

  Own Id: OTP-8842

#### Fixed bugs and malfunctions

-

### 1.16 Megaco 3.14.1.1

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.

#### Improvements and new features

- Updated the performance chapter.

  Own Id: OTP-8696

#### Fixed bugs and malfunctions

-

### 1.17 Megaco 3.14.1

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

#### Improvements and new features

- A minor compiler related performance improvement.

  Own Id: OTP-8561

#### Fixed bugs and malfunctions

- 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.

  Note that this solution only protects against multiple reply deliveries!

  Own Id: OTP-8529

  Aux Id: Seq 10915

- Fix shared libraries installation.

  The flex shared lib(s) were incorrectly installed as data files.

  Peter Lemenkov

  Own Id: OTP-8627

- Eliminated a possible race condition while creating pending counters.

  Own Id: OTP-8634

  Aux Id: Seq 11579

### 1.18 Megaco 3.14

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

#### Improvements and new features

- Various changes to configure and makefile(s) to facilitate cross compilation (and other build system improvements).

  Own Id: OTP-8323

- 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.

  Own Id: OTP-8362

- Adapted megaco_filter to the new internal format.

  Own Id: OTP-8403

#### Fixed bugs and malfunctions

- Callbacks, when the callback module is unknown (undefined), results in warning messages.

  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.

  Own Id: OTP-8328

  Aux Id: Seq 11384

### 1.19 Megaco 3.13

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

#### Improvements and new features

- A minor optimization by using ets:update_element instead of ets:insert for some table updates.

  Own Id: OTP-8239

- The documentation is now built with open source tools (xsltproc and fop) that exists on most platforms. One visible change is that the frames are removed.

  Own Id: OTP-8249

#### Fixed bugs and malfunctions

-

#### Incompatibilities

-