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Subject: Re: IPv6 Address as text (C)
To: Ken Moore <ken@pcbsd.org>, Hiroki Sato <hrs@FreeBSD.org>
References: <5668369F.9020309@pcbsd.org>
 <20151209.233515.1592617248580059512.hrs@allbsd.org>
 <566847F3.7060900@pcbsd.org>
Cc: freebsd-net@freebsd.org
From: "Andrey V. Elsukov" <bu7cher@yandex.ru>
Message-ID: <56685C23.600@yandex.ru>
Date: Wed, 9 Dec 2015 19:51:47 +0300
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On 09.12.15 18:25, Ken Moore wrote:

Simple example:

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>

#include <err.h>
#include <ifaddrs.h>
#include <netdb.h>
#include <stdio.h>
#include <string.h>

int
main(int argc, char **argv)
{
        char buf[INET6_ADDRSTRLEN];
        struct ifaddrs *ifap, *ifa;
        int error;

        if (getifaddrs(&ifap) !=3D 0)
                err(1, "getifaddrs");
        for (ifa =3D ifap; ifa; ifa =3D ifa->ifa_next)
                if (ifa->ifa_addr->sa_family =3D=3D AF_INET6) {
                        error =3D getnameinfo(ifa->ifa_addr,
                            ifa->ifa_addr->sa_len, buf, sizeof(buf),
                            NULL, 0, NI_NUMERICHOST);
                        if (error !=3D 0)
                                err(1, "%s", gai_strerror(error));
                        printf("%s\n", buf);
                }
        freeifaddrs(ifap);
        return (0);
}

--=20
WBR, Andrey V. Elsukov


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