This is a bugfix release.


  • Fix TLS operation with websockets listeners and libwebsockets 2.x. Closes #186.
  • Don't disconnect client on HUP before reading the pending data. Closes #7.
  • Fix some $SYS messages being incorrectly persisted. Closes #191.
  • Support OpenSSL 1.1.0.
  • Call fsync after persisting data to ensure it is correctly written. Closes #189.
  • Fix persistence saving of subscription QoS on big-endian machines.
  • Fix will retained flag handling on Windows. Closes #222.
  • Broker now displays an error if it is unable to open the log file. Closes #234.

Client library

  • Support OpenSSL 1.1.0.
  • Fixed the C++ library not allowing SOCKS support to be used. Closes #198.
  • Fix memory leak when verifying a server certificate with a subjectAltName section. Closes #237.


  • Don't attempt to install docs when WITH_DOCS=no. Closes #184.