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path: root/ChangeLog.d/dtls-connection-id.txt
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Features
   * Add support for DTLS Connection ID as defined by RFC 9146, controlled by
     MBEDTLS_SSL_DTLS_CONNECTION_ID (enabled by default) and configured with
     mbedtls_ssl_set_cid().

Default behavior changes
   * Previously the macro MBEDTLS_SSL_DTLS_CONNECTION_ID implemented version 05
     of the IETF draft, and was marked experimental and disabled by default.
     It is now no longer experimental, and implements the final version from
     RFC 9146, which is not interoperable with the draft-05 version.
     If you need to communicate with peers that use earlier versions of
     Mbed TLS, then you need to define MBEDTLS_SSL_DTLS_CONNECTION_ID_COMPAT
     to 1, but then you won't be able to communicate with peers that use the
     standard (non-draft) version.
     If you need to interoperate with both classes of peers with the
     same build of Mbed TLS, please let us know about your situation on the
     mailing list or GitHub.