netdev - Generic Netlink multipart messages

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Date:   Wed, 24 Jun 2020 11:59:00 -0300
From:   Matheus Rodrigues <matheusrk800@...il.com>
To:     netdev@...r.kernel.org
Subject: Generic Netlink multipart messages

I'm trying to send a relatively "big" string (+/- 60Kb) through
generic netlink, for this, I know that I've to use the multipart
mechanism offered by the API, using the flags NLM_F_MULTI and
NLMSG_DONE, but I don't know how to implement it, there is some
example which breaks the string in various packages and send it to
kernel? I looked a lot for some example but I didn't find any that
does this. If there is none, so how do I do that using only the
mechanism offered by libnl and generic netlink?