---
name: "gnutls_record_recv_seq"
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_recv_seq"
---

# gnutls\_record\_recv\_seq(3)

API function

## NAME

gnutls\_record\_recv\_seq - API function

## SYNOPSIS

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

**ssize\_t gnutls\_record\_recv\_seq(gnutls\_session\_t** *session***, void \*** *data***, size\_t** *data\_size***, unsigned char \*** *seq***);**

## ARGUMENTS

- gnutls\_session\_t session

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

- void \* data

  the buffer that the data will be read into

- size\_t data\_size

  the number of requested bytes

- unsigned char \* seq

  is the packet's 64-bit sequence number. Should have space for 8 bytes.

## DESCRIPTION

This function is the same as **gnutls\_record\_recv()**, except that it returns in addition to data, the sequence number of the data. This is useful in DTLS where record packets might be received out-of-order. The returned 8-byte sequence number is an integer in big-endian format and should be treated as a unique message identification.

## RETURNS

The number of bytes received and zero on EOF.  A negative error code is returned in case of an error.  The number of bytes received might be less than  *data\_size* .

## SINCE

3\.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/