During GSoC 2017 I worked on implementation of server-to-server part of XEP-0198 protocol. This extension improve reliability of server-to-server communication and make the whole XMPP network more robust.
I implemented mod_stream_mgmt_s2s
module for ejabberd. This module adds support for server-to-server stream management.
To view commit history follow link:
https://github.com/Amuhar/ejabberd/commits/xep_0198_s2s?author=amuhar
To view documentation for server-to-server stream management module follow link:
https://github.com/Amuhar/docs_for_0198_s2s/blob/master/mod_stream_mgmt_s2s.md