open62541/open62541 v1.5.4 on GitHub

This open62541 release v1.5.4 is the fourth maintenance release of the 1.5 release series.

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.

Important changes compared to the previous v1.5.3 release include:

core: Fix the case where the last chunk may exceed the max message size
core: Fix QualifiedName_parse when name contains a semicolon
core: Harden JSON parsing with error and max recursion checks
core: Allow UA_DateTime_parse without zero termination of the input string
core: Fix handling some empty elements (e.g. ) in the XML decoding
core: Handle array length == 0 and calloc returns NULL
server: Use un/lockServer() for the server-mutex in ua_server_async.c
server: Always return the correct method call status codes
server: Avoid stack-use-after-scope in removeCertificate (GDS push)
server: Check for writing null to non-nullable variable node
server: Fix missing values below Server object
server: Always set missing attribute timestamps
server: Always Add missing but required certificate to endpoints
server: Re-add MaxMonitoredItemsQueueSize
server: Mask all detailed certificate validation failures for identity tokens
server: Reset serverOnNetworkHash hash entry pointer to null to avoid stale references
server: Increase the number of default MaxContinuationPoints per session to 32
server: allow removal of CA certificates without valid CRL
server: Check size of uploaded TrustList in writeTrustList
server: Correct range check in UA_CAST_SIGNED macro
server: Allow reading values with uncertain status in readWithReadValue
server: Return BadWaitingForInitialData for empty non-nullable variables
server: Correctly guard anonymous-only TransferSubscription path
server: Allow anonymous subscription transfer on secure channels with matching ApplicationUri
server: Detach subscriptions on session timeout instead of deleting
server: Return Bad_WriteNotSupported for StatusWrite/TimestampWrite violations
server: Enforce AccessLevel StatusWrite and TimestampWrite bits
client: Add the UA_Client_runUntilInterrupt convenience function
client: Delete nsMapping on allocation failures during responseReadNamespacesArray
client: _getRemoteDataTypes() resolves in-call datatype dependencies
pubsub: Prevent potential double-free in NS0 type destructors
pubsub: Timeout when disabling all PubSub components
pubsub: Warn when structure fields with nested strings use RawData encoding
pubsub: Prevent null pointer dereference in removeGroupAction
el: Align the lwip EventLoop mutex to the POSIX EventLoop behavior
el: Improve batching scalability for large numbers of timers
el: Fix data races in timer implementation
el: Return on interface being NULL while opening an ethernet connection for POSIX
deps: Update ua-nodeset submodule to 257db9a
build: Include missing client symbols in amalgamation without discovery
build: Fix missing clock implementation in Win32/POSIX compatible amalgamation
docs: Add documentation of %Q specifier for UA_String_format
plugins: Add missing ECC security policies
plugins: Register an InterruptManager by default in the client EventLoop

Diff stat: 141 files changed, 18713 insertions(+), 1307 deletions(-)
Diff stat in /include and /src: 43 files changed, 849 insertions(+), 220 deletions(-)

New features and major changes compared to the previous 1.4 release series include:

core: JSON de/encoding according to the OPC UA 1.05 specification
core: XML de/encoding of Variants (also with multi-dimensional arrays) and structure-types
core: UA_String_format with shorthands to print OPC UA builtin types
arch: Support for FreeRTOS (using the lwip EventLoop)
arch: Support for QNX
arch: Support for Zephyr
server: Support for "local" Event-MonitoredItems
server: Extended async operations (read/write/call)
server: Improved value source API for VariableNodes
server: Implement CertificateGroup handling
server: Support for GDS push operations
client: Transparent mapping between local and remote namespace-indices
client: Automatically read the NamespaceArray during connect (add to the namespace mapping)
client: Support for Event-MonitoredItems
client: All async service APIs are typed
client: Load DataTypeDefinitions from the server at runtime
pubsub: Support for manual de/encoding of PubSub messages
pubsub: Custom state machine for PubSubComponents to integrate communication backends
pubsub: Public API to compute offset tables for fixed Network-/DataSetMessages
pubsub: Improved loading of PubSub configurations from a (binary) file
pubsub: Initial support for SKS
nodeset-compiler: Use the native XML decoding to parse attributes at runtime
util: Query language (and parser) for EventFilter, RelativePath, etc.
util: Convert DataTypeDefinition into UA_DataType (internal representation)
eventloop: EventLoop can be cancelled to immediately return from a "poll-sleep"
eventloop: Option to limit the number of sockets open at the same time
eventloop: Support for lwip-based EventLoop
plugins: Crypto PKI/SecurityGroup with a file-system storage backend
plugins: Support for ECC-based SecurityPolicies (OpenSSL only)
tools: "Shell mode" for the ua-cli terminal client