---
name: "rpc_gss_max_data_length"
section: "3"
platform: "freebsd"
package: "base"
version: "16.0-CURRENT-20261027-61c70dc16a79"
release: "FreeBSD 16.0-CURRENT (2026-10-27)"
platforms: ["freebsd"]
url: "https://new.carta.tech/rpc_gss_max_data_length"
---

# rpc\_gss\_max\_data\_length(3)

calculate maximum data size

## NAME

**rpc\_gss\_max\_data\_length** – calculate maximum data size

## LIBRARY

library “librpcsec\_gss”

## SYNOPSIS

**#include \<rpc/rpcsec\_gss.h\>**

*int*\

**rpc\_gss\_max\_data\_length**(*AUTH \*auth*, *int max\_tp\_unit\_len*);

## DESCRIPTION

Calculate the maximum message size that will fit into a packet of size *max\_tp\_unit\_len*, given the current service and QoP setting.

## PARAMETERS

- auth

  A handle to a RPCSEC\_GSS security context

- max\_tp\_unit\_len

  Maximum packet size of the underlying transport protocol

## RETURN VALUES

The maximum message size that can be encoded

## SEE ALSO

[gssapi(3)](/gssapi/3.md), [rpc(3)](/rpc/3.md), [rpcsec\_gss(3)](/rpcsec_gss/3.md)

## HISTORY

The **rpc\_gss\_max\_data\_length** function first appeared in FreeBSD 8.0.

## AUTHORS

This manual page was written by Doug Rabson ⟨*dfr@FreeBSD.org*⟩.