[#GEN_SESSION_CB]
= GEN_SESSION_CB
:mrdocs:

Server callback that generates a new SSL/TLS session ID.

== Synopsis

Declared in `<openssl/ssl.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
typedef int(* GEN_SESSION_CB)(xref:SSL.adoc[SSL]*, unsigned char*, unsigned int*);
----

== Return Value

Non‐zero to proceed, or 0 on error.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ssl*
| SSL connection for which a session ID is being created.
| *id*
| Buffer that receives the generated session ID bytes.
| *id_len*
| On entry, maximum allowed ID length; on success, actual length written (must be > 0).
|===


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