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This may be necessary if the session.conn object is not exchanged by the
network backend when establishing TLS. In that case, the starttls method
will always exist and thus that is not a good indicator for offering
TLS.
However, the secure bit already tells us that TLS has been established
or is not to be established on the connection, so we use that instead.
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This now requires that the network backend exposes a tls_builder
function, which essentially wraps the former util.sslconfig.new()
function, passing a factory to create the eventual SSL context.
That allows a net.server backend to pick whatever it likes as SSL
context factory, as long as it understands the config table passed by
the SSL config builder. Heck, a backend could even mock and replace the
entire SSL config builder API.
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For this, various accessor functions are now provided directly on the
sockets, which reach down into the LuaSec implementation to obtain the
information.
While this may seem of little gain at first, it hides the implementation
detail of the LuaSec+LuaSocket combination that the actual socket and
the TLS layer are separate objects.
The net gain here is that an alternative implementation does not have to
emulate that specific implementation detail and "only" has to expose
LuaSec-compatible data structures on the new functions.
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Otherwise it would just report "is not trusted" unless you inspect the
logs. This message is sent to to the remote server, and will hopefully
show up in their logs, allowing the admin to fix their DANE setup.
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Should be invoked for cases such as when the Let's Encrypt intermediate
certificate expired not too long ago.
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Using a timer was a hack to get around that stream features are not
available at the right time and sendq stanzas were stored as strings
so could not be counted properly. The later has now been fixed and the
former is fixed by recording the relevant stream feature on the session
so that the correct version of XEP-0198 can be activated once the
connection has been authenticated and is ready to start.
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Same as previous commit
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Equivalent to 'local' in Lua, these functions are exported via the
luaopen_ function, which is the only one needing to be visible outside
of the file.
Pointed out by Link Mauve at some point, but there wasn't really any
rush here.
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Connection attempts that failed the Happy Eyeballs race were not
unreferenced and would accumulate.
Tested by inspecting the 'pending_connections_map' after establishing
s2s with a s2s target where the IPv6 port has a -j DROP rule causing it
to time out and the IPv4 attempt wins the race.
Expected is that the losing connection stays around until net.server
timeouts kick in where it should be removed. The map table should tend
towards being empty during idle times.
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This is the "right" thing to do. Strings were more memory-efficient, but
e.g. bypassed stanza filters at reconnection time. Also not being stanzas
prevents us from potential future work, such as merging sendq with mod_smacks.
Regarding performance: we should counter the probable negative effect of this
change with other positive changes that are desired anyway - e.g. a limit on
the size of the sendq, improved in-memory representation of stanzas, s2s
backoff (e.g. if a remote server is persistently unreachable, cache this
failure for a while and don't just keep forever queuing stanzas for it).
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Since commands[node] was already stored in a local a few lines up
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This allows easier access to these, which could be useful for all sorts
of reasons
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This could lead to failure being reported too early, even if some connections
have not yet failed.
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RFC 8305
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...and prepare for Happy Eyeballs
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Potential performance gain since the tables don't need to be resized as
they grow to the final size.
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Code reduction, potentially a performance gain.
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