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nng_sockaddr_in6.5.adoc

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nng_sockaddr_in6(5)

NAME

nng_sockaddr_in6 - IPv6 socket address

SYNOPSIS

#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];
} nng_sockaddr_in6;

DESCRIPTION

An nng_sockaddr_in6 is the flavor of nng_sockaddr used to represent TCP (and sometimes UDP) addresses, including the Internet Protocol (IP) address and port number.

This structure is used with IPv6 addresses. A different structure, nng_sockaddr_in, is used for IPv4 addresses.

The following structure members are present:

sa_family

This field will always have the value NNG_AF_INET6.

sa_port

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.

sa_addr

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

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.