[#SSL_CTX_set_msg_callback]
= SSL_CTX_set_msg_callback
:mrdocs:

Install a callback that observes SSL/TLS/QUIC protocol messages on new connections.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
void
SSL_CTX_set_msg_callback(
    xref:SSL_CTX.adoc[SSL_CTX]* ctx,
    void(* cb)(int, int, int, void const*, size_t, xref:SSL.adoc[SSL]*, void*));
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| SSL context whose new SSL objects inherit `cb.`
| *cb*
| Message callback, or NULL to disable; see SSL_set_msg_callback for argument meanings.
|===


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