---
name: "gnutls_session_set_data"
section: "3"
platform: "linux"
package: "gnutls"
version: "3.8.13-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gnutls_session_set_data"
---

# gnutls\_session\_set\_data(3)

API function

## NAME

gnutls\_session\_set\_data - API function

## SYNOPSIS

**#include \<gnutls/gnutls.h\>**

**int gnutls\_session\_set\_data(gnutls\_session\_t** *session***, const void \*** *session\_data***, size\_t** *session\_data\_size***);**

## ARGUMENTS

- gnutls\_session\_t session

  is a **gnutls\_session\_t** type.

- const void \* session\_data

  is a pointer to space to hold the session.

- size\_t session\_data\_size

  is the session's size

## DESCRIPTION

Sets all session parameters, in order to resume a previously established session.  The session data given must be the one returned by **gnutls\_session\_get\_data()**.  This function should be called before **gnutls\_handshake()**.

Keep in mind that session resuming is advisory. The server may choose not to resume the session, thus a full handshake will be performed.

## RETURNS

On success, **GNUTLS\_E\_SUCCESS** (0) is returned, otherwise an error code is returned.

## REPORTING BUGS

Report bugs to \<bugs@gnutls.org\>.\
 Home page: https://www.gnutls.org

## COPYRIGHT

Copyright © 2001-2023 Free Software Foundation, Inc., and others.\
 Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

## SEE ALSO

The full documentation for **gnutls** is maintained as a Texinfo manual. If the /usr/share/doc/gnutls/ directory does not contain the HTML form visit

- https://www.gnutls.org/manual/