DDS Discovery Recorder

[ruffsl]

I'm working on a pure Rust CLI to record DDS discovery data for system profiling purposes, e.g. building a directional graph modeling the connectivity of participants within the DDS network after runtime.

Work in progress can be found here:
https://github.com/ruffsl/dds_recon

The CLI binary would be deployed to a target platform and network, then executed to record DDS discovery events for a specified domain, including discovered participants, topics, etc. For ease of use and log file introspection, recorded discovery data would be written to disk via a database interface, such as SQLite.

I’d like to reuse as much of the RustDDS library as possible, although from my initial experimenting, it seems the current DomainParticipant struct does not expose, and perhaps justifiably so, enough public interfaces to readily obtain domain level meta data such as discovered domain participants and associated data readers and writers with respective topic QoS info.

Given the intended abstraction layer the library is meant to provide, this is more than fine for conventional DDS applications, but I suspect my use case may necessitate reaching deep into the library and reimplementing DomainParticipant to appropriately intercept or redirect thead channel messages in order to gather an append only database of discoveries. Perhaps there may also be a simpler way to extend the current DomainParticipant struct to add a callback thread to trigger upon changes to existing internal data structures, such as discovery_db field or DiscoveryDB struct?

Any suggestions on how best to approach this for development?

[fgadaleta]

Any progress on that one?
I am trying to implement the manual discovery from a list of IP:PORT, so far without success.
In my use case I cannot use multicast. If you have found anything that can help progress, let's join forces ;)