#include <nng/nng.h>
enum sockaddr_family {


    NNG_AF_INET6 = 4,
};
typedef struct {


    uint16_t sa_family;


    uint16_t sa_port;


    uint8_t  sa_addr[16];


    uint32_t sa_scope;
} nng_sockaddr_in6;

This field will always have the value NNG_AF_INET6.

This field holds the TCP or UDP port number, in network byte-order. A zero value here is used when no specific port number is indicated.

This field holds the IP address in network-byte order.

This is the scope, and is typically used with link local addresses to identify a specific interface. The details of this are specific to the operating system. This value is presented identically to the underlying system’s, including any byte order considerations.

Tip

The sa_port and sa_addr fields are in network-byte order to
facilitate their use with system APIs such as inet_ntop(). Most platforms use some form of BSD-derived network API, which uses network-byte order in the various structures (such as sockaddr_in6).

Important

This field appears similar to BSD sockaddr_in6, but it is
not the same, and they may not be used interchangeably.