What's Fixed in 2.4.16.1
========================

The following are fixes since |me| 2.4.16.

.. include:: severity_levels.txt

:critical:`[Critical]` When using Zero Copy, the sample returned by get_loan() could have an insufficient size
--------------------------------------------------------------------------------------------------------------

When certain data types were enabled for the Zero Copy v2 transport, the value
returned by ``sizeof()`` was larger than the difference between the pointers
returned by the *DataWriter*'s ``get_loan()`` method. As a consequence,
applications were at risk of writing outside of allocated memory boundaries.

This problem has been resolved by updating an ``rtiddsgen`` code template. You
must regenerate any code previously generated by ``rtiddsgen`` after installing
the modified template.

[RTI Issue ID MICRO-12511]

:major:`[Major]` Incorrect check for multicast address
------------------------------------------------------

.. note::

  This issue only affected the reference PSL, not the PIL.

To determine if an IP address was a multicast address, |me| should have checked
if the first byte of the address fell within the range of 224-239. However, |me|
only checked if the address started with 239. If an application did not use 239
exactly, then the application would not join the multicast group and
*DomainParticipant* creation could fail.

[RTI Issue ID MICRO-12795]

:major:`[Major]` udpv4_singlethr_init_port_entry() function caused UDP communication to fail
--------------------------------------------------------------------------------------------

.. note::

  This issue only affected the reference PSL, not the PIL.

The ``function udpv4_singlethr_init_port_entry()`` did not initialize all fields
of the ``struct sockaddr_in sock_addr`` object. This could cause the binding of
a socket to fail, which then caused communication over the UDP transport to
fail.

[RTI Issue ID MICRO-12765]