On Wed, Aug 21, 2024 at 11:30:52PM +0200, David Uhden Collado wrote:
> Dear all,
> 
> As mentioned in a previous email I sent to this mailing list [1], I am
> currently working on porting SimpleXMQ and SimpleX Chat CLI to OpenBSD.
> Unfortunately, I have encountered several challenges. In addition to the
> issue I previously discussed [1], two more complications have arisen:
> 
> 1. OpenSSL Requirement: It is necessary to use OpenSSL because,
> unfortunately, LibreSSL does not support the encryption algorithms used by
> this software.

README.md seems to say OpenSSL is needed for the server part.  I
suspect it's about the lack of Ed448.  Do you know what else would be
missing?

> This issue seems to have a relatively straightforward
> solution by installing OpenSSL from the ports tree and specifying the
> location of these libraries in a cabal.project.local file located in the
> root directory before compiling the software.

The LibreSSL developers try to keep the list of OpenSSL consumers in
ports short, but yes, it is a possible approach.

> 2. Linux TCP Socket Options: SimpleXMQ, on which the SimpleX Chat CLI client
> depends, uses Linux-specific TCP socket options [2] that are not available
> in OpenBSD [3], namely TCP_KEEPIDLE, TCP_KEEPINTVL, and TCP_KEEPCNT. My
> questions regarding this issue are:
> 
>    - Why are these options not present in OpenBSD's TCP stack? Both FreeBSD
> [4] and NetBSD [5] include them in their TCP stacks. Is there a specific
> reason for their absence in OpenBSD?

I suspect nobody bothered to implement those options.  I think adding
them would make sense.

>    - Is there an equivalent to these TCP socket options in OpenBSD? Are
> there other ports facing similar issues? If so, how have they been patched
> to function correctly in OpenBSD?

By patching out the relevant setsockopt(2) calls, or by hiding them
behind #ifndef TCP_KEEPSOMETHING. Just use grep on the ports tree to
see examples.

> For your reference, here is the source code file I am attempting to patch to
> build SimpleXMQ on OpenBSD:
> 
> https://github.com/simplex-chat/simplexmq/blob/stable/src/Simplex/Messaging/Transport/KeepAlive.hs

I guess you could just kill lines 65-67.

> References:
> 1. https://marc.info/?l=openbsd-ports&m=172387102027342&w=2
> 2. https://www.man7.org/linux/man-pages/man7/tcp.7.html
> 3. https://man.openbsd.org/tcp
> 4. https://man.freebsd.org/cgi/man.cgi?query=tcp&sektion=4
> 5. https://man.netbsd.org/tcp.4
> 
> Thank you for your time and assistance.
> 
> Best regards,
> David.
> 

-- 
jca