---
name: "gnutls_ext_get_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_get_data"
---

# gnutls\_ext\_get\_data(3)

API function

## NAME

gnutls\_ext\_get\_data - API function

## SYNOPSIS

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

**int gnutls\_ext\_get\_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

  a pointer to the private data to retrieve

## DESCRIPTION

This function retrieves any data previously stored with **gnutls\_ext\_set\_data()**.

## RETURNS

**GNUTLS\_E\_SUCCESS** on success, otherwise a negative error code.

## 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/