use IO::Socket::INET6;
use Socket;
use Socket6;

my $sock = IO::Socket::INET6->new(
    Proto    => 'udp',
) or die "Could not create socket: $!\n";

my $pack = pack_sockaddr_in6(23456, inet_pton(AF_INET6,'2000:1234:5678:9abc::eeff'));

IO::Socket::send($sock, "message", 0, $pack) or die "Can't send: $!\n";

print $sock->sockhost(),"\n";
print $sock->sockport(),"\n";
print $sock->peerhost(),"\n";
print $sock->peerport(),"\n";