= ranch:set_transport_options(3)

== Name

ranch:set_transport_options - Set the transport options

== Description

[source,erlang]
----
set_transport_options(Ref       :: ranch:ref(),
                      TransOpts :: any())
    -> ok | {error, running}
----

Set the transport options.

The listener must be suspended for this call to succeed.
If the listener is running, `{error, running}` will be returned.

The change will take effect when the listener resumes.

== Arguments

Ref::

The listener name.

TransOpts::

The new transport options.

== Return value

The atom `ok` is always returned. It can be safely ignored.

== Changelog

* *2.0*: The `TransOpts` argument must no longer contain
         Ranch-specific options if given as a list. Use a map.

== Examples

.Set the transport options
[source,erlang]
----
Ref = example,

ok = ranch:suspend_listener(Ref),
ok = ranch:set_transport_options(Ref, TransOpts),
ok = ranch:resume_listener(Ref).
----

== See also

link:man:ranch:suspend_listener(3)[ranch:suspend_listener(3)],
link:man:ranch:resume_listener(3)[ranch:resume_listener(3)],
link:man:ranch:get_transport_options(3)[ranch:get_transport_options(3)],
link:man:ranch:set_max_connections(3)[ranch:set_max_connections(3)],
link:man:ranch:set_protocol_options(3)[ranch:set_protocol_options(3)],
link:man:ranch(3)[ranch(3)]
