Hi perlmonks:

I have Mac running OS X/Yellow Dog Linux and PC running Linux.
If I run p0f http://lcamtuf.coredump.cx/p0f.shtml on Mac OS X or Yellow dog Linux on Power Mac G5 as:

p0f -Q /var/run/p0f.sock -0 'dst port 80' >>/dev/null &

and run ./p0fq.pl /var/run/p0f.sock src_host 0 dst_host 80

I get "P0f did not honor our query."

the p0fq.pl works fine If I run on x86 machine.

My question is whether this problem is caused by the use of pack function of script p0fq.pl because Mac is big endian and PC is little endian, could anyone recommend a working solution? the p0fq.pl script is as following: 

use strict;
use IO::Socket;
use Net::IP;

my $QUERY_MAGIC = 0x0defaced;
my $QTYPE_FINGERPRINT = 1;

die "usage: p0fq.pl p0f_socket src_ip src_port dst_ip dst_port"
  unless $#ARGV == 4;

# Convert the IPs and pack the request message
my $src = new Net::IP ($ARGV[1]) or die (Net::IP::Error());
my $dst = new Net::IP ($ARGV[3]) or die (Net::IP::Error());
print "$ARGV[1]\n";
my $query = pack("L L L N N S S", $QUERY_MAGIC, $QTYPE_FINGERPRINT, 0x
+12345678,
                 $src->intip(), $dst->intip(), $ARGV[2], $ARGV[4]);

# Open the connection to p0f
my $sock = new IO::Socket::UNIX (Peer => $ARGV[0],
                                 Type => SOCK_STREAM);
die "Could not create socket: $!\n" unless $sock;

# Ask p0f
print $sock $query;
my $response = <$sock>;
close $sock;

# Extract the response from p0f
my ($magic, $id, $type, $genre, $detail, $dist, $link, $tos, $fw,
    $nat, $real, $score, $mflags, $uptime) =
  unpack ("L L C Z20 Z40 c Z30 Z30 C C C s S N", $response);
die "Bad response magic.\n" if $magic != $QUERY_MAGIC;
die "P0f did not honor our query.\n" if $type == 1;
die "This connection is not (no longer?) in the cache.\n" if $type == 
+2;

# Display result
print "Genre    : " . $genre . "\n";
print "Details  : " . $detail . "\n";
print "Distance : " . $dist . " hops\n";
print "Link     : " . $link . "\n";
print "Uptime   : " . $uptime . " hrs\n";

[download]

In reply to p0fq.pl and pack? by macli

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.