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Could arguably be implied by 'recipient-unavailable' since if it was
available, this error wouldn't happen.
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Cuts down on noise as well
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For consistency and easier correlation of session events.
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Those lines are long and the risk of mistakes if another one needs to be
added seems high, but lower when factored out like this.
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Tells you if you make a typo like "gropchat" or so
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Gets you nice error messages if you make a typo in with error_reply()
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This is a Linux(?) socket option that delays the accept signal until
there is data available to read. E.g. with HTTP this might mean that a
whole request can be handled without going back trough another turn of
the main loop, and an initial client <stream> can be responded to.
This may have effects on latency and resource use, as the server does
not need to allocate resources until really needed.
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Since it provides some protection and error handling in the form of
logging.
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Reduces the side effects of wrapsocket()
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Requires a patch to LuaSocket adding this socket option,
https://github.com/lunarmodules/luasocket/pull/378
sysctl tweaks
net.ipv4.tcp_fastopen=3
net.ipv4.tcp_fastopen_blackhole_timeout_sec = 0
net.ipv4.tcp_fastopen_key=$(</proc/sys/kernel/random/uuid)
Disabled by default since it an advanced performance tweak unlikely to
be needed by most servers.
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Setting the .smacks field enables code paths that expects the queue to
be present. The queue is initialized in wrap_session_out(). With
opportunistic writes enabled this happens immediately on .sends2s(), so
the sending <enable> must happen before OR after these two lines, not in
the middle.
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This previously was considered an error because the module API Teal spec
did not document a return value from module:add_timer()
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Since it's used in mod_cron
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This would mainly be error stanzas.
Good to have some trace of when handling of them are finished.
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The check for the type attr was lost in 11765f0605ec leading to attempts
to create error replies for error stanzas, which util.stanza rejects.
Tested by sending
<message to="reject.badxmpp.eu" type="error"><error/></message>
which produced a traceback previously.
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server_select is used in e.g. storagemanager tests, and some of the CI
runners are lacking LuaSec, which resulted in failures.
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We at some point decided that it was okay to have a hard dependency the
TLS library. Especially here since this module is meant to contain all
LuaSec specifics.
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In case the network backend needs it for outgoing SNI or something.
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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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