This document outlines the overall direction that libcoap is development is envisioned to go.

Release 4.3

• Separate public API from internal API, code cleanup ✓
• improve fuzzer tests and unit tests
• OSCORE support (will be included in Release 4.3.2)
• Q-Block support (will be included in Release 4.3.2)
• RIOT-OS support (will be included in Release 4.3.2)
• TinyDTLS support for LwIP (will be included in Release 4.3.2)

Examples

• Port the resource directory server to the latest specification ❌
• Equip coap-server example with COMI-aligned Host MIB ❌
• possibly add DTLS support to existing examples for Contiki

Retransmission Tasks for POSIX (✓)

The lwip and Contiki versions are able to handle retransmissions automatically. There is code that does this for POSIX as well, but it needs more testing and a fallback implementation in case the RT timer API is not available. This might also imply making the libcoap core MT-safe.

Update: A different approach has been taken for the main loop management. Applications now can select between APIs that do the complete work and a set of functions that provide fine-grained access to the retransmission logic.

Release 4.2 ✓

• (improved) TLS/DTLS support
  • Pre-shared keys, X.509 certificates
  • new session abstraction
• TCP Transport according to RFC 8323
• improved documentation; manual pages
• changes in internal PDU structure
• improved examples (DTLS usage, block-wise transfer)
• docker images for continuous integration
• support for Google OSS fuzzer
• MS Visual Studio project for Windows builds

Release 4.1.2 ✓

This is the first release with the new directory structure and complete autotools-support for configuration and build.

• White-space cleanup (patches provided by Carsten) ✓
• partial cleanup of coap_config.h ✓
• Documentation:
• Fix description in README and INSTALL ✓
• Write a guideline how to use and implement the library (with a basic example?) ❌
• Build Environment
• Switch the build environment to fully controlled by the autotools ✓
• Change the library to symbols with versions ✓
• Extended platform support ✓
• Currently tested and working i386, amd64, armel, armhf, OS X … ? ✓
• Move to GitHub ✓
• Continuous Integration using Travis CI ✓