---
name: "nng_msg_header_len"
section: "3"
platform: "linux"
package: "libnng-dev"
version: "1.10.1-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/nng_msg_header_len"
---

# nng\_msg\_header\_len(3)

return message header length

## NAME

nng\_msg\_header\_len - return message header length

## SYNOPSIS

```
#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(3)](/nng_msg_alloc/3.md), [nng\_msg\_header(3)](/nng_msg_header/3.md), [nng\_msg(5)](/nng_msg/5.md), [nng(7)](/nng/7.md)