SYNOPSIS

#include <nng/nng.h>

int nng_msg_header_insert(nng_msg *msg, const void *val, size_t size);

int nng_msg_header_insert_u32(nng_msg *msg, uint32_t val32);

DESCRIPTION

The nng_msg_header_insert() and nng_msg_header_insert_u32() functions prepend data to the front of the headers of message msg, reallocating if necessary. The first function prepends size bytes, copying them from val. The second function prepends the value val32 in network-byte order (big-endian).

RETURN VALUES

This function returns 0 on success, and non-zero otherwise.

ERRORS

NNG_ENOMEM

Insufficient free memory exists.

SEE ALSO