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The tests are starting and stopping a Ranch listener,
and starting a Ranch listener then immediately call
ranch:info/1.
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Also fix the downgrade in the test suite.
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Update the release upgrade test suite to use the appup from
src/ rather than from ebin/.
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Also fix some Protocol:start_link/4 into start_link/3
left over in the documentation.
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Lift the restriction that a listener must be suspended before
transport options can be changed.
* Changes to the `max_connections`, `handshake_timeout` and `shutdown`
options will take effect immediately.
* Changes to the `num_acceptors`, `num_listen_sockets` and `socket_opts`
options will take effect when a listener is suspended and resumed, or
when the acceptors supervisor restarts.
* Changes to the `num_conns_sups` and `connection_type` options will only
take effect when the connections super-supervisor restarts.
* Changes to the `logger` option will never take effect, unless a listener
is stopped and started with fresh transport options.
The fetching and handing down of transport options changes with this
commit, to ensure consistency between the individual components in the
hierarchy.
* The `num_acceptors` option is handed down from the listener supervisor to
the acceptors supervisor in the child spec, while the `num_listen_sockets`
and `socket_opts` options are read inside the acceptors supervisor itself.
This way, the `num_acceptors` option will only take effect when the listener
supervisor restarts, whereas the other two options will take effect
when acceptors supervisor restarts. This commit moves the fetching of
the `num_acceptors` option into the acceptors supervisor as well.
* The `logger` option is read in multiple places throughout the hierarchy.
This way it may happen that processes that suffered a crash and restart
may use a different logger than other processes that did not. This commit
reads the `logger` from the transport options given to the listener supervisor
start function, and hands it down from there.
* The `connection_type` option is read individually by each connection supervisor.
This way, a restart of an individual connection supervisor may cause them
to use a different connection type than the others. This commit reads the
transport options in the connections super-supervisor, and hands them down to
the individual connections supervisors.
* The `num_conns_sups` is handed down from the listener supervisor to the
connections super-supervisor. This way, a change to this option will only
take effect when the listener supervisor restarts. This commit moves
the fetching of this option inside the connections super-supervisor. This
change is merely for structural consistency, it is not necessary for operational
consistency.
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The callback `ranch_transport:listen/1` has changed to accept a map
of transport options instead of socket options.
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It was working already but the types were wrong and some small
details needed to be corrected.
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This makes Ranch require OTP-21+. The function ranch:accept_ack/1
was also removed in this commit.
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This new option allows configuring the number of connection
supervisors. The old behavior can be obtained by setting this
value to 1. A value larger than num_acceptors will result in
some connection supervisors not being used as the acceptors
currently only use one connection supervisor.
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This gets rid of a bottleneck that occurs when many connections
are handled by a single supervisor. The bigger issue occurred
when many connections were dropped at once and the supervisor
couldn't keep up.
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Due to a typo, repeated calls to ranch:remove_connection/1 from a
worker process would crash the respective ranch_conns_sup.
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This is the function that should be called regardless of
TCP or TLS being used. The proper usage for this function is:
{ok, ProxyInfo} = ranch:recv_proxy_header(Ref, Timeout),
{ok, Socket} = ranch:handshake(Ref),
...
Ranch takes care of everything else under the hood. Transports
now need to have a Transport:recv_proxy_header/2 function. For
ranch_ssl the function gets the port from the sslsocket() record
and then calls ranch_tcp:recv_proxy_header/2 with it.
This means that two undocumented features are currently used for
this, but the interface is really nice so that's a sacrifice
worth doing. Also worth noting is that OTP 22 should have an
alternative for gen_tcp:unrecv/2 so the only real issue is about
the sslsocket() record at the moment.
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The race condition occurs when the restart is faster than
the cleaning up. With this commit the restart will perform
the cleanup if it was not done beforehand.
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This uses the undocumented function gen_tcp:unrecv/2.
Tests have been added for both gen_tcp and ssl connections,
including sending data in the same first packet, at least
for gen_tcp (ssl tests may or may not end up buffering some
of the TLS handshake before the recv call, but there's no
guarantees).
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I had to use the process dictionary to work around the current
interface for one log call. You have been warned.
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Based on the work done by @juhlig.
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