[#SSL_CTX_has_client_custom_ext]
= SSL_CTX_has_client_custom_ext
:mrdocs:

Return whether a client custom extension of type `ext_type` is registered on `ctx.`

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
SSL_CTX_has_client_custom_ext(
    xref:SSL_CTX.adoc[SSL_CTX] const* ctx,
    unsigned int ext_type);
----

== Return Value

1 if a client custom extension handler is registered, or 0 otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context to query.
| *ext_type*
| TLS extension type code.
|===


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