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2007-07-18 17:14:34 by steve

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Generate a 'random' MAC address if one isn't specified.
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steve
2007-07-18 17:14:34 +00:00
parent 9a933302ec
commit 2a71cb12f9
1 changed files with 64 additions and 2 deletions
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66
bin/xen-create-image
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@@ -594,7 +594,7 @@ Install an X11 server, using VNC and XDM
--
http://www.steve.org.uk/
$Id: xen-create-image,v 1.167 2007-07-16 00:22:55 steve Exp $
$Id: xen-create-image,v 1.168 2007-07-18 17:14:34 steve Exp $
=cut
@@ -612,6 +612,7 @@ The LICENSE file contains the full text of the license.
use strict;
use English;
use Digest::MD5 qw/ md5_hex /;
use Env;
use File::Path qw/ mkpath /;
use File::Temp qw/ tempdir /;
@@ -1374,7 +1375,7 @@ sub parseCommandLineArguments
if ( $VERSION )
{
my $REVISION = '$Revision: 1.167 $';
my $REVISION = '$Revision: 1.168 $';
if ( $REVISION =~ /1.([0-9.]+) / )
{
$REVISION = $1;
@@ -1724,10 +1725,71 @@ EOF
logprint( "WARNING: No netmaks address specified!\n" )
unless( defined( $CONFIG{'netmask'} ) );
}
#
# If we don't have a MAC address specified then generate one.
#
if ( !$CONFIG{'mac'} )
{
$CONFIG{'mac'} = generateMACAddress();
}
}
=begin doc
Generate a 'random' MAC address.
The MAC address is constructed based upon :
1. The standard Xen prefix.
2. The hostname + IP address of the new guest.
3. The distribution which is to be installed.
=end doc
=cut
sub generateMACAddress
{
#
# Start with the xen prefix
#
my $mac = '00:16:3E';
#
# Build up ( hostname + ip + dhcp + dist );
#
my $hash = '';
foreach my $key ( qw/ hostname ip dhcp dist / )
{
$hash .= $CONFIG{$key} if ( $CONFIG{$key} );
}
#
# Generate an MD5 hash of this data.
#
$hash = md5_hex( $hash );
#
# Now build up a MAC address
#
while( length( $mac ) < 17 )
{
$mac .= ":" . substr( $hash, 0, 2 );
$hash = substr( $hash, 2 );
}
return( $mac );
}
=head2 doc
Make sure we have a log directory, and create an empty logfile