1  Megaco Release Notes

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.

  • Removed configure option --enable-sanitizers. It was untested and broken. Address sanitizer for the emulator has better support by the asan build target.

    Own Id: OTP-18538 Aux Id: GH-7031, PR-7078

  • Replace size/1 with either tuple_size/1 or byte_size/1

    The size/1 BIF is not optimized by the JIT, and its use can result in worse types for Dialyzer.

    When one knows that the value being tested must be a tuple, tuple_size/1 should always be preferred.

    When one knows that the value being tested must be a binary, byte_size/1 should be preferred. However, byte_size/1 also accepts a bitstring (rounding up size to a whole number of bytes), so one must make sure that the call to byte_size/ is preceded by a call to is_binary/1 to ensure that bitstrings are rejected. Note that the compiler removes redundant calls to is_binary/1, so if one is not sure whether previous code had made sure that the argument is a binary, it does not harm to add an is_binary/1 test immediately before the call to byte_size/1.

    Own Id: OTP-18432 Aux Id: GH-6672,PR-6793,PR-6784,PR-6787,PR-6785,PR-6682,PR-6800,PR-6797,PR-6798,PR-6799,PR-6796,PR-6813,PR-6671,PR-6673,PR-6684,PR-6694,GH-6677,PR-6696,PR-6670,PR-6674

  • A very minor improvement to the measurement tool.

    Own Id: OTP-18298

  • Fixed various dialyzer related issues in the examples and the application proper.

    Own Id: OTP-18179 Aux Id: ERIERL-836

  • There is a new configure option, --enable-deterministic-build, which will apply the deterministic compiler option when building Erlang/OTP. The deterministic option has been improved to eliminate more sources of non-determinism in several applications.

    Own Id: OTP-18165 Aux Id: PR-5965

  • Input for configure scripts adapted to autoconf 2.71.

    Own Id: OTP-17414 Aux Id: PR-4967

  • Megaco test suite(s) use the new peer module for node starts.

    Own Id: OTP-17910

  • The compilation time is no longer recorded in BEAM files. There remained several undocumented functions that attempted to retrieve compilation times. Those have now been removed.

    Own Id: OTP-17962

  • Update the performance and debug chapters of the megaco user's guide. Also some updates to the meas tools.

    Own Id: OTP-17839

  • [megaco_tcp] When connect fails, include more info in the error reason.

    Own Id: OTP-17817

  • It is now possible to configure the built-in transports (megaco_tcp and megaco udp) to use the new (gen_udp- and gen_tcp-) option 'inet_backend'.

    Own Id: OTP-17533

  • Commit of generated configure script.

    Own Id: OTP-17420 Aux Id: OTP-17398, GH-4821

  • All the pre-v3 codec(s) (prev3a, prev3b and prev3c) was deprecated in OTP-23.0. They have now been removed.

    *** POTENTIAL INCOMPATIBILITY ***

    Own Id: OTP-16560

  • Removed deprecated functions marked for removal.

    Own Id: OTP-17049

  • Commit of generated configure script.

    Own Id: OTP-17420 Aux Id: OTP-17398, GH-4821

  • Fixed usage of AC_CONFIG_AUX_DIRS() macros in configure script sources.

    Own Id: OTP-17093 Aux Id: ERL-1447, PR-2948

  • Empty statistics descriptor (now) allowed in both encode and decode for version 3.

    Own Id: OTP-17012 Aux Id: ERL-1405

  • The expected number of warnings when (yecc) generating v2 and v3 (text) parser's was incorrect.

    Own Id: OTP-16836

  • The v2 and v3 parsers could not properly decode some IPv6 addresses.

    Own Id: OTP-16818 Aux Id: ERIERL-526

  • The mini parser could not properly decode some IPv6 addresses.

    Own Id: OTP-16631 Aux Id: ERIERL-491

  • Refactored the internal handling of deprecated and removed functions.

    Own Id: OTP-16469

  • The preliminary version 3 codec(s) prev3a, prev3b and prev3c has been deprecated and will be *removed* in OTP 24. The encoding config option 'version3' will continue to work until OTP 24.

    Own Id: OTP-16531

  • Commit of generated configure script.

    Own Id: OTP-17420 Aux Id: OTP-17398, GH-4821

  • Empty statistics descriptor (now) allowed in both encode and decode for version 3.

    Own Id: OTP-17012 Aux Id: ERL-1405

  • The v2 and v3 parsers could not properly decode some IPv6 addresses.

    Own Id: OTP-16818 Aux Id: ERIERL-526

  • The mini parser could not properly decode some IPv6 addresses.

    Own Id: OTP-16631 Aux Id: ERIERL-491

  • The documented function megaco:get_sdp_record_from_PropertGroup/2 was a wrapper for megaco_sdp:get_sdp_record_from_PropertGroup/2 but did not actually exist. This has now been fixed.

    Own Id: OTP-16449

  • Test suite completely reworked. Add (timestamp) utility functions for debugging and testing.

    Own Id: OTP-16158

  • The meas example had not been updated for a long time, which caused it to not work. Also, it made use of deprecated functions (now()). This has now been fixed.

    Own Id: OTP-16061

  • Fix various minor issues related to Dialyzer. Mostly these are dialyzer warnings, but there was also some minor bugs detected by Dialyzer.

    Own Id: OTP-15882

  • Minor updates to build system necessary due to move of configuration of crypto application.

    Own Id: OTP-15262 Aux Id: OTP-15129

  • Minor adjustments made to build system for parallel configure.

    Own Id: OTP-15340 Aux Id: OTP-14625

  • Improved documentation.

    Own Id: OTP-15190

  • Removed all old unused files in the documentation.

    Own Id: OTP-14475 Aux Id: ERL-409, PR-1493

  • Typos have been fixed.

    Own Id: OTP-14387

  • Internal changes

    Own Id: OTP-13551

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

    Own Id: OTP-12762

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

    Own Id: OTP-12348

  • 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

  • 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

  • Updated doc files to utf8.

    Own Id: OTP-10907

  • Introduced functionality for inspection of system and build configuration.

    Own Id: OTP-11196

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

    Own Id: OTP-11016

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

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  • 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

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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.

  • 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

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  • 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.

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.

  • 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.

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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.

  • Fixed some faulty test cases.

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

    Own Id: OTP-9949

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

  • 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

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

  • Correct various XML errors.

    Own Id: OTP-9550

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

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  • Fixing miscellaneous things detected by dialyzer.

    Own Id: OTP-9075

  • Fixing auto-import issues.

    Own Id: OTP-8842

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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.

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

  • A minor compiler related performance improvement.

    Own Id: OTP-8561

  • 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

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

  • 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

  • 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

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

  • 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

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