= nng_msg_header_len(3)
:doctype: manpage
:manmanual: nng
:mansource: nng
:manvolnum: 3
:copyright: Copyright 2018 mailto:info@staysail.tech[Staysail Systems, Inc.] + \
            Copyright 2018 mailto:info@capitar.com[Capitar IT Group BV] + \
            {blank} + \
            This document is supplied under the terms of the \
            https://opensource.org/licenses/MIT[MIT License].

== NAME

nng_msg_header_len - return message header length

== SYNOPSIS

[source, c]
-----------
#include <nng/nng.h>

size_t nng_msg_header_len(nng_msg *msg);
-----------

== DESCRIPTION

The `nng_msg_header_len()` returns the length of message header of _msg_.

== RETURN VALUES

Length of message header.

== ERRORS

None.

== SEE ALSO

<<nng_msg_alloc#,nng_msg_alloc(3)>>,
<<nng_msg_header#,nng_msg_header(3)>>,
<<nng#,nng(7)>>

== COPYRIGHT

{copyright}