Java implementation for the CCSDS SLE (Space Link Extension) protocol.
Currently implemented services are:
- Forward CLTU Service
- Return All Frame Service
- Return Channel Frame Service
Both user (client) and provider(server) are implemented.
There is also a SLE to UDP bridge which implements a standalone SLE provider useful as frontend for a simulator. See below.
This library is independent from Yamcs; it's only dependencies are
- netty used to implement the network communication
- ASN.1 library jasn1 used to encode/decode the SLE messages.
The yamcs-sle package is based on this library and offers data links implementation that allow Yamcs to connect to SLE.
TODO: add some automated tests
The SLE to UDP bridge is useful for testing a SLE connection to an existing simulator in a setup like this:
MCS with SLE (e.g. Yamcs) <--- RAF/RCF/FCLTU SLE --> SleUdpBridge <---- CLTU/AOS|TM frames/UDP ----> Simulator
The configuration is in bridge.properties. logging.properties can be adjusted to increase the logging at SLE level.
To start the bridge, please launch the script: ./udp-sle-bridge.sh
To start the bridge directly in the source repository: mvn exec:java
- RCF works effectively as RAF, no filtering on VCID is performed by the provider