[#SSL_client_hello_get1_extensions_present]
= SSL_client_hello_get1_extensions_present
:mrdocs:

Allocate and return the list of extension types present in a ClientHello.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_client_hello_get1_extensions_present(
    xref:SSL.adoc[SSL]* s,
    int** out,
    size_t* outlen);
----

== Return Value

1 on success, or 0 on failure.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| Server SSL connection inside a ClientHello callback (or with a parsed ClientHello).
| *out*
| Receives a newly allocated array of extension type integers; free with OPENSSL_free.
| *outlen*
| Receives the number of entries in *`out.`
|===


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