[#SSL_client_hello_get0_compression_methods]
= SSL_client_hello_get0_compression_methods
:mrdocs:

Return the raw compression_methods field from a parsed ClientHello.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
size_t
SSL_client_hello_get0_compression_methods(
    xref:SSL.adoc[SSL]* s,
    unsigned char const** out);
----

== Return Value

Length of the compression_methods field in bytes, or 0 if unavailable.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| Server SSL connection inside a ClientHello callback (or with a parsed ClientHello).
| *out*
| If non‐NULL, set to point at the compression methods bytes.
|===


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