[#SSL_allow_early_data_cb_fn]
= SSL_allow_early_data_cb_fn
:mrdocs:

Server callback that decides whether to accept TLSv1.3 early data for a connection.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int(* SSL_allow_early_data_cb_fn)(xref:SSL.adoc[SSL]*, void*);
----

== Return Value

1 to allow early data, or 0 to reject it.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| Server SSL connection that received early data / a 0‐RTT ClientHello.
| *arg*
| Application pointer from SSL_CTX_set_allow_early_data_cb() / SSL_set_allow_early_data_cb().
|===


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