Eclipse Californium (Cf) CoAP Framework 2.4.0

The 2.4.0 release comes with changes and bugfixes.

Changes in DTLS:

  • handshake messages now supports multiple fragments in one record, RFC 6347, 4.2.3
  • handshake message retransmission back off with smaller record size, RFC 6347, 4.1.1.1
  • handshake message retransmission implementation moved from DTLSConnector to Handshaker.
  • MTU clean up
  • RFC 8449, record size limit
  • interoperability tests with libcoap+tinydtls
  • add experimental/early access support for EdDSA with java 15, or external library net.i2p.crypto.eddsa.

Changes in CoAP:

  • Failover of transfer to blockwise for 4.13
  • Add caching and readme to Proxy2. Update guava to 28.2-android

Introduction of maven-toolchains-plugin with new build options see Build Using Maven

Release Date
Release Type
Minor release