gnutls\_est\_record\_overhead\_size(3) gnutls gnutls\_est\_record\_overhead\_size(3)

# [NAME](#NAME)

gnutls\_est\_record\_overhead\_size - API function

# [SYNOPSIS](#SYNOPSIS)

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

**size\_t gnutls\_est\_record\_overhead\_size(gnutls\_protocol\_t version, gnutls\_cipher\_algorithm\_t cipher, gnutls\_mac\_algorithm\_t mac, gnutls\_compression\_method\_t comp, unsigned int flags);**

# [ARGUMENTS](#ARGUMENTS)

[gnutls\_protocol\_t version](#gnutls_protocol_t)

is a **gnutls\_protocol\_t** value

[gnutls\_cipher\_algorithm\_t cipher](#gnutls_cipher_algorithm_t)

is a **gnutls\_cipher\_algorithm\_t** value

[gnutls\_mac\_algorithm\_t mac](#gnutls_mac_algorithm_t)

is a **gnutls\_mac\_algorithm\_t** value

[gnutls\_compression\_method\_t comp](#gnutls_compression_method_t)

is a **gnutls\_compression\_method\_t** value (ignored)

[unsigned int flags](#unsigned)

must be zero

# [DESCRIPTION](#DESCRIPTION)

This function will return the set size in bytes of the overhead due to TLS (or DTLS) per record.

Note that this function may provide inaccurate values when TLS extensions that modify the record format are negotiated. In these cases a more accurate value can be obtained using **gnutls\_record\_overhead\_size()** after a completed handshake.

# [SINCE](#SINCE)

3.2.2

# [REPORTING BUGS](#REPORTING_BUGS)

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

# [COPYRIGHT](#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](#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/](https://www.gnutls.org/manual/)

3.8.13 gnutls

---

Document: gnutls_est_record_overhead_size(3) from gnutls 3.8.13-r3 (Chainguard OS)
Source: https://gitlab.com/gnutls/gnutls