Anjay 3.4.0

Features

• New APIs for server connection lifecycle management:
  anjay_server_schedule_reconnect() and anjay_schedule_register()
• New options in anjay_configuration_t that allow for optional more strict
  LwM2M TS compliance: update_immediately_on_dm_change and
  enable_self_notify
• Added option to disable auto-closing of the socket when in queue mode.
• avs_coap_observe_cancel() is now public API (for direct users of avs_coap)
• Added Advanced Firmware Update as an Anjay module
• Added simplified demo of Advanced Firmware Update with two firmware images
• Added tutorial for Advanced Firmware Update

Improvements

• Observations are now automatically cancelled if the client needs to send a new
  Register messsage
• Added explicit casts in macros that involve negating an unsigned value, to
  silence warnings generated by some compilers
• Various improvements and refactors of integration tests, to make them run
  faster and more stable
• (commercial feature only) Disabled servers are saved now in Core Persistence,
  which prevents them from registering until the timeout passes with respect to
  the real clock.

Bugfixes

• Fixed handling of SenML payload that could cause erroneous behavior and memory
  leaks when parsing payloads only containing the Base Name field, without Name
• Fixed error handling in bootstrapper (commercial only) and factory
  provisioning modules so that the changes are properly rolled back in case of
  error
• Fixed assertion error (or 4.05 Method Not Allowed when compiled without
  assertions) when attempting to set the Disable Timeout resource in the Server
  object when the ANJAY_WITHOUT_DEREGISTER configuration option is set
• Fixed inequality comparisons on some time values that could cause erroneous
  behavior on platforms with low-resolution system clocks, and updated unit
  tests to not assume a high-resolution clock
• Fixed a problem where anjay_ongoing_registration_exists() inconditionally
  returned true if any server connection in a "disabled" state existed
• Timeout when sending a Confirmable Notification now cancels the observation,
  as required by RFC 7641
• Removed sending of Release messages when using CoAP+TCP, which fixes the issue
  of erroneously sending them at the beginning after reconnecting a LwM2M
  connection socket
• Fixed the serial port handling code in the sample NIDD driver, to properly
  handle cases where more than one line is received in a single read() call
• Fixed compatibility of integration tests with the current versions of the
  Python cryptography module
• Fixed problems with compiling the library without WITH_AVS_COAP_BLOCK
  enabled (contributed by Flonidan A/S)
• Fixed a bug in the pymbedtls library used by tests, that prevented it from
  working in DTLS client mode
• Fixed bug in the "Custom (D)TLS layers" code examples