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#!/usr/bin/perl -w | |
# Dependencies: | |
# sudo apt-get install libxml-xpath-perl libsys-virt-perl | |
use strict; | |
use XML::XPath; | |
use XML::XPath::XMLParser; | |
use Sys::Virt; | |
# Open libvirt connection and get the domain. | |
my $conn = Sys::Virt->new (readonly => 1); | |
my $dom = $conn->get_domain_by_name ($ARGV[0]); | |
# Get the libvirt XML for the domain. | |
my $xml = $dom->get_xml_description (); | |
# Parse out the MAC addresses using an XPath expression. | |
my $xp = XML::XPath->new (xml => $xml); | |
my $nodes = $xp->find ("//devices/interface[\@type='network']/mac/\@address"); | |
my $node; | |
my @mac_addrs; | |
foreach $node ($nodes->get_nodelist) { | |
push @mac_addrs, lc ($node->getData) | |
} | |
# Look up the MAC addresses in the output of 'arp -an'. | |
my @arp_lines = split /\n/, `arp -an`; | |
foreach (@arp_lines) { | |
if (/\((.*?)\) at (.*?) /) { | |
my $this_addr = lc $2; | |
if (list_member ($this_addr, @mac_addrs)) { | |
print "$1\n"; | |
} | |
} | |
} | |
sub list_member | |
{ | |
local $_; | |
my $item = shift; | |
foreach (@_) { | |
return 1 if $item eq $_; | |
} | |
return 0; | |
} |
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