---
name: "gnutls_record_send2"
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_record_send2"
---

# gnutls\_record\_send2(3)

API function

## NAME

gnutls\_record\_send2 - API function

## SYNOPSIS

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

**ssize\_t gnutls\_record\_send2(gnutls\_session\_t** *session***, const void \*** *data***, size\_t** *data\_size***, size\_t** *pad***, unsigned** *flags***);**

## ARGUMENTS

- gnutls\_session\_t session

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

- const void \* data

  contains the data to send

- size\_t data\_size

  is the length of the data

- size\_t pad

  padding to be added to the record

- unsigned flags

  must be zero

## DESCRIPTION

This function is identical to **gnutls\_record\_send()** except that it takes an extra argument to specify padding to be added the record. To determine the maximum size of padding, use **gnutls\_record\_get\_max\_size()** and **gnutls\_record\_overhead\_size()**.

Note that in order for GnuTLS to provide constant time processing of padding and data in TLS1.3, the flag **GNUTLS\_SAFE\_PADDING\_CHECK** must be used in **gnutls\_init()**.

## RETURNS

The number of bytes sent, or a negative error code.  The number of bytes sent might be less than  *data\_size* .  The maximum number of bytes this function can send in a single call depends on the negotiated maximum record size.

## SINCE

3\.6.3

## 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/