SYNOPSIS
#include <nng/nng.h>
int nng_msg_dup(nng_msg **dup, nng_msg_t *orig);DESCRIPTION
The nng_msg_dup() makes a duplicate of the original message orig, and
saves the result in the location pointed by dup. The actual message
body and header content is copied, but the duplicate may contain a
different amount of unused space than the original message.
RETURN VALUES
This function returns 0 on success, and non-zero otherwise.
ERRORS
NNG_ENOMEM-
Insufficient free memory exists to duplicate a message.