I am sending a request to DNS server and I think I am getting the packed reply back from the server,but I don't know how to unpack the reply and print it on the screen, pleae help , thanks

#!/usr/bin/perl
use IO::Socket;
    &dnsQueryPacket($ARGV[0],$ARGV[1]);

sub dnsQueryPacket{
    my $hostname = $_[0];
    # my @labels = split(/\./, $hostname) ; my $n = scalar(@labels) ; 
+my $question = pack("(C/a*)$n C n2", @labels, 0, 1, 1) ; 
    my @labels;
    my $nlabels = 0;

    my @labels = split(/\./, $hostname) ;
    my $n = scalar(@labels) ;
    my $question = pack("(C/a*)$n C n2", @labels, 0, 1, 1) ;

    $header1 = &dnsheader;
    $server = '130.149.2.12';
    $sock = new IO::Socket::INET
(PeerAddr=>$server,PeerPort=>'53',Proto=>'udp') or die "Can't Connect"
+;
    #sending request
    $sock->send($header1.$question);
    #receiveing request
    $sock->recv($buf,512);
    
    close($sock);
    }

    sub dnsheader{
        $id = 1000;
        $qr_Opcode_aa_tc_rd = '00000000';
        $ra_Z_Rcode = '00000000';
        $Qdcount = 1;
        $Ancount = 0;
        $Nscount = 0;
        $Arcount = 0;
        $header = pack("n,b8,b8,n4",$id++,
                     "$qr_Opcode_aa_tc_rd",#qr,opcode,aa,tc,rd fields
                     "$ra_Z_Rcode",#ra,Z,Rcode fields 
                     "$Qdcount",#one question(Qdcount)
                     "$Ancount",#no answers (ancount)
                     "$Nscount",
                     "$Arcount");#no addtl rr's
        return $header;
    }
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