This documentation is for version v1.3.0 of NNG, but the latest released version is v1.8.0. see the documentation for v1.8.0 for the most up-to-date information.


#include <nng/nng.h>

typedef struct {
void * iov_buf;
size_t iov_len;
} nng_iov;


An nng_iov structure represents a single element in a scatter/gather array. Some operations can use arrays of these to access different regions of memory in a single operation. For example, it may be useful to send a message with header data from one part of memory, and a user payload from another.

The operations that do this typically store an array of these in an nng_aio structure using the nng_aio_set_iov() function.

The following structure members are present:


This is a pointer to the first byte within the memory being referenced by this scatter/gather element.


This is the size in bytes of this scatter/gather element.