[#SSL_client_hello_get_extension_order]
= SSL_client_hello_get_extension_order
:mrdocs:

Copy ClientHello extension type values in the order they appeared.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_client_hello_get_extension_order(
    xref:SSL.adoc[SSL]* s,
    uint16_t* exts,
    size_t* num_exts);
----

== Return Value

1 on success, or 0 on failure (including when `exts` is too small).

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| Server SSL connection inside a ClientHello callback (or with a parsed ClientHello).
| *exts*
| Buffer that receives ExtensionType values, or NULL to query the required count only.
| *num_exts*
| On input, capacity of `exts` when non‐NULL; on output, the number of extensions.
|===


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