---
name: "gnutls_ext_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_ext_set_data"
---

# gnutls\_ext\_set\_data(3)

API function

## NAME

gnutls\_ext\_set\_data - API function

## SYNOPSIS

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

**void gnutls\_ext\_set\_data(gnutls\_session\_t** *session***, unsigned** *tls\_id***, gnutls\_ext\_priv\_data\_t** *data***);**

## ARGUMENTS

- gnutls\_session\_t session

  a **gnutls\_session\_t** opaque pointer

- unsigned tls\_id

  the numeric id of the extension

- gnutls\_ext\_priv\_data\_t data

  the private data to set

## DESCRIPTION

This function allows an extension handler to store data in the current session and retrieve them later on. The set data will be deallocated using the gnutls\_ext\_deinit\_data\_func.

## SINCE

3\.4.0

## 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/