Perl 5.8 is very old. Whether that’s the problem I don’t know; but when I add a line defining $hostname to the code you posted:

#! perl
use strict;
use warnings;
use Socket qw(:addrinfo SOCK_RAW);

my $hostname = 'perlmonks.pair.com';

my ($err, @res) = getaddrinfo($hostname, "", { socktype => SOCK_RAW })
+;
die "Cannot getaddrinfo - $err" if $err;

while (my $ai = shift @res)
{
    my ($err, $ipaddr) = getnameinfo($ai->{addr}, NI_NUMERICHOST, NIx_
+NOSERV);
    die "Cannot getnameinfo - $err" if $err;

    print "$ipaddr\n";
}

[download]

it works correctly on my system:

22:41 >perl 1602_SoPW.pl
209.197.123.153

22:42 >

[download]

(Windows 8.1 64-bit, Strawberry Perl 5.22.1, Socket v2.021.)

Hope that helps,

Athanasius <°(((>< contra mundum Iustus alius egestas vitae, eros Piratica,

In reply to Re^3: perl and getaddrinfo API by Athanasius
in thread perl and getaddrinfo API by swissknife

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.