Re: [MirageOS-devel] Update on capnp-rpc

[Thomas Leonard <talex5@xxxxxxxxx>]

Note: I'm moving this thread to
https://discuss.ocaml.org/t/mirage-capn-proto-rpc-library/658

Please check there for the latest news or discussion...


On 21 July 2017 at 16:05, Thomas Leonard <talex5@xxxxxxxxx> wrote:
> As I mentioned in Wednesday's catch-up, I've been continuing to work
> on Cap'n Proto RPC support.
>
> The current status is that level 1 support is now complete, and I've
> added a tutorial and some helpers to make it easy to use it in Unix
> processes. See:
>
>   https://github.com/mirage/capnp-rpc/blob/master/README.md
>
> Next on my TODO list:
>
> 1. The fuzz tests found a race, where messages may get delivered out
> of order in some (convoluted) cases.
> I asked on the capnp list, and it seems that the C++ reference
> implementation doesn't handle this quite right either.
> We're investigating a fix, but it's unlikely you'll hit the problem.
> See: https://github.com/mirage/capnp-rpc/issues/59
>
> 2. The API for building requests and responses has a lot of
> boilerplate. I'd like to simplify this by modifying capnp-ocaml to
> allow attaching capabilities to messages without requiring a separate
> type.
>
> 3. There are some (minor) Unix dependencies in the library and in
> capnp-ocaml, which need moving out so we can use it in unikernels.
>
> 4. Start on level 2 support, which will require the library to be able
> to establish secure connections. Currently, it doesn't do any crypto
> and so the helpers only allow connections over Unix-domain sockets for
> now.
>
> I'd be interested in feedback from anyone who wants to try it!


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