Re: How to get wildcard addresses using getaddrinfo?

[VinsWorldcom]

For address family independent DNS lookups, I used this as a test for IPv6 support in Perl. This may not be the most elegant way of doing it, but it returns both IPv4 and IPv6 addresses for my local workstation and domain names you enter.

# On Windows without modifying Socket compilation
use Socket qw(inet_ntoa unpack_sockaddr_in IPPROTO_TCP AF_INET AF_UNSP
+EC);
use Socket6;
use Socket::GetAddrInfo qw(getaddrinfo getnameinfo);
# OR just this with Socket modified - http://vinsworldcom.blogspot.com
+/2012/08/ipv6-in-perl-on-windows_20.html
use Socket 2.005 qw(:addrinfo inet_ntoa inet_ntop unpack_sockaddr_in u
+npack_sockaddr_in6 IPPROTO_TCP AF_INET AF_UNSPEC);

use Sys::Hostname;

if (!@ARGV) {
    $ARGV[0] = hostname;
}

my %hints = (
     family => AF_UNSPEC,
     protocol => IPPROTO_TCP
);
my ($err, @getaddr) = getaddrinfo($ARGV[0], undef, \%hints);
if (defined($getaddr[0])) {
    for my $addr (@getaddr) {
        my $address;
        if ($addr->{family} == AF_INET) {
            (undef, $address) = unpack_sockaddr_in($addr->{addr})
        } else {
            (undef, $address) = unpack_sockaddr_in6($addr->{addr})
        }

        my $host = inet_ntop($addr->{family}, $address);
        print  "$host\n";

        if (0) { # set to 1 to do reverse lookup
            my ($err, $host, $service) = getnameinfo($addr->{addr}, NI
+_NAMEREQD);
            printf " |_>  %s\n", (defined($host)) ? $host : $err
        }
    }
} else {
    print "$0: getaddrinfo() failed - error = $err\n"
}

And the results (note my local IPv6 addresses obscured with XXXX ...):

VinsWorldcom@C:\Users\VinsWorldcom\tmp> test.pl
fe80::WWWW:XXXX:YYYY:ZZZZ
fe80::WWWW:XXXX:YYYY:ZZZZ
fe80::WWWW:XXXX:YYYY:ZZZZ
AAAA:BBBB:CCCC:DDDD:WWWW:XXXX:YYYY:ZZZZ
fe80::WWWW:XXXX:YYYY:ZZZZ
fe80::WWWW:XXXX:YYYY:ZZZZ
192.168.12.1
192.168.58.1
192.168.10.102
10.200.200.254
10.100.100.254
192.168.100.254

VinsWorldcom@C:\Users\VinsWorldcom\tmp> test.pl www.google.com
2001:4860:800a::6a
173.194.73.106
173.194.73.147
173.194.73.99
173.194.73.104
173.194.73.105
173.194.73.103

[sushant.ravale]

thanks for the reply, getaddrinfo('<wildcard>', 3786, AF_UNSPEC, SOCK_STREAM, 0, AI_PASSIVE); solved the issue, I am getting wild card addresses now.