[#SSL_get0_alpn_selected]
= SSL_get0_alpn_selected
:mrdocs:

Return the ALPN protocol selected during the handshake.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
SSL_get0_alpn_selected(
    xref:SSL.adoc[SSL] const* ssl,
    unsigned char const** data,
    unsigned int* len);
----

== Return Value

the ALPN protocol selected during the handshake.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ssl*
| SSL connection to query.
| *data*
| Receives a pointer to the selected protocol name (not NUL‐terminated), or NULL if none.
| *len*
| Receives the length of the selected protocol in bytes.
|===


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