[Announcement] v1.4.2 Patch Release

[Julius Pfrommer]

Dear all,

There is now a first patch release for the 1.4 release series.

Thanks to everybody whose effort contributed to this release.

The release notes are below.

You can get it on Github at https://github.com/open62541/open62541/releases/tag/v1.4.2.

Best regards,

Julius Pfrommer

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This is the second patch release v1.4.2 of the 1.4 release series of open62541.

open62541 (http://open62541.org) is an open source implementation of OPC UA (OPC Unified Architecture / IEC 62541) written in the C language. The library is usable with all major compilers and provides the necessary tools to implement dedicated OPC UA clients and servers, or to integrate OPC UA-based communication into existing applications. The open62541 library is platform independent: All platform-specific functionality is implemented via exchangeable plugins for easy porting to different (embedded) targets.

open62541 is licensed under the Mozilla Public License v2.0 (MPLv2). This allows the open62541 library to be combined and distributed with any proprietary software. Only changes to the open62541 library itself need to be licensed under the MPLv2 when copied and distributed. The plugins, as well as the server and client examples are in the public domain (CC0 license). They can be reused under any license and changes do not have to be published.

The important changes compared to the previous release v1.4.1 are:

- core: Fix default network values in UA_ConnectionConfig_default
- server: Don't force UA_MESSAGESECURITYMODE_SIGNANDENCRYPT for Discovery if encryption is disabled
- server: Add ModelChangeEventType and ConditionType to reduced namespace
- client: Add missing channel state UA_SECURECHANNELSTATE_OPN_SENT
- client: Fix channel state set to CLOSING without closing underlying connection
- pubub: Cleanup of the PubSub RT examples
- nc: Correct setting of the NamespaceIndex
- plugins: Add missing function in the rsapss security policy for OpenSSL
- arch: Fix build error with undefined UA_IPV6
- arch: Fix build error on posix with undefined UA_IPV6
- build: Correct path for schema files of external build
- build: Fix OpenSSL link flags in build output files
- build: Clean soname in shared library
- build: Define dependencies not exposed in the API as private

New features and major changes compared to the previous release series 1.3 include:

- core: Switch to an EventLoop model for the control flow
- core: Support for OpenSSL 3.0
- core: Add the Aes256-Sha256-RsaPss security policy
- core: Automatically unwrap ExtensionObject arrays inside UA_Variant
- core: txtime feature for time-based sending of Ethernet packets (Linux only)
- client/server/pubsub: Server, Client and PubSub API are thread-safe with internal locks
- client/server: Private key password protection with a userland callback (client and server)
- client/server: Authentication with x509 certificates (client and server)
- client/server: Support for session-specific server locales (nodes can have localized Description and DisplayName)
- client: Make connection properties in the client accessible via the API
- client: Allow setting a custom SessionName in the client config
- client: Consider the request timeoutHint in synchronous service calls of the client
- server: Implementation of the TransferSubscription and Cancel Service
- server: File-based server configuration using a JSON5 configuration file
- server: Make Session properties in the server accessible via the API
- server: Use an encrypted SecureChannel for registering at a Discovery Server
- server: MonitoredItems with negative sampling interval (linked to the publish interval of the Subscription)
- server: Integration with the NodesetLoader project for runtime parsing and integration of Nodeset XML files
- server: Session and Subscription Diagnostics as part of the server object
- server: Support for the AccessLevelEx attribute
- server: Support for EventFilters
- server: ReverseConnect for the Server
- server: Use config->shutdownDelay delay for the server shutdown
- server: Use dedicate PKI for SecureChannel and Session certificates
- pubsub: Support for the PubSub SKS (Security Key Service)
- pubsub: Support for PubSub UDP Unicast
- pubsub: PubSub StandaloneSubscribedDataSets information model representation