use strict;
use warnings;
use Test::More tests => 14;

use Socket qw(:addrinfo AF_INET pack_sockaddr_in inet_aton);

my ( $err, $host, $service );

( $err, $host, $service ) = getnameinfo( pack_sockaddr_in( 80, inet_aton( "127.0.0.1" ) ), NI_NUMERICHOST|NI_NUMERICSERV );
cmp_ok( $err, "==", 0, '$err == 0 for {family=AF_INET,port=80,sinaddr=127.0.0.1}/NI_NUMERICHOST|NI_NUMERICSERV' );
cmp_ok( $err, "eq", "", '$err eq "" for {family=AF_INET,port=80,sinaddr=127.0.0.1}/NI_NUMERICHOST|NI_NUMERICSERV' );

is( $host, "127.0.0.1", '$host is 127.0.0.1 for NH/NS' );
is( $service, "80", '$service is 80 for NH/NS' );

( $err, $host, $service ) = getnameinfo( pack_sockaddr_in( 80, inet_aton( "127.0.0.1" ) ), NI_NUMERICHOST|NI_NUMERICSERV, NIx_NOHOST );
is( $host, undef, '$host is undef for NIx_NOHOST' );
is( $service, "80", '$service is 80 for NS, NIx_NOHOST' );

( $err, $host, $service ) = getnameinfo( pack_sockaddr_in( 80, inet_aton( "127.0.0.1" ) ), NI_NUMERICHOST|NI_NUMERICSERV, NIx_NOSERV );
is( $host, "127.0.0.1", '$host is undef for NIx_NOSERV' );
is( $service, undef, '$service is 80 for NS, NIx_NOSERV' );

# Probably "localhost" but we'd better ask the system to be sure
my $expect_host = gethostbyaddr( inet_aton( "127.0.0.1" ), AF_INET );
defined $expect_host or $expect_host = "127.0.0.1";

( $err, $host, $service ) = getnameinfo( pack_sockaddr_in( 80, inet_aton( "127.0.0.1" ) ), NI_NUMERICSERV );
cmp_ok( $err, "==", 0, '$err == 0 for {family=AF_INET,port=80,sinaddr=127.0.0.1}/NI_NUMERICSERV' );

is( $host, $expect_host, "\$host is $expect_host for NS" );
is( $service, "80", '$service is 80 for NS' );

# Probably "www" but we'd better ask the system to be sure
my $flags = NI_NUMERICHOST;
my $expect_service = getservbyport( 80, "tcp" );
unless( defined $expect_service ) {
    $expect_service = "80";
    $flags |= NI_NUMERICSERV; # don't seem to have a service name
}

( $err, $host, $service ) = getnameinfo( pack_sockaddr_in( 80, inet_aton( "127.0.0.1" ) ), $flags );
cmp_ok( $err, "==", 0, '$err == 0 for {family=AF_INET,port=80,sinaddr=127.0.0.1}/NI_NUMERICHOST[|NI_NUMERICSERV]' );

is( $host, "127.0.0.1", '$host is 127.0.0.1 for NH' );
is( $service, $expect_service, "\$service is $expect_service for NH" );