[#SSL_CTX_set_next_protos_advertised_cb]
= SSL_CTX_set_next_protos_advertised_cb
:mrdocs:

Set the Next Protocol Negotiation (NPN) advertisement callback for servers.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
SSL_CTX_set_next_protos_advertised_cb(
    xref:SSL_CTX.adoc[SSL_CTX]* s,
    xref:SSL_CTX_npn_advertised_cb_func.adoc[SSL_CTX_npn_advertised_cb_func] cb,
    void* arg);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *s*
| SSL context used by NPN servers.
| *cb*
| Callback that supplies the protocol list to advertise, or NULL to clear.
| *arg*
| User pointer forwarded to `cb.`
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#