#!/usr/bin/perl -w

# Drakwizard PXE
# release 0.2
# Copyright (C) 2004 Mandrakesoft
#
# Author: Antoine Ginies <aginies _ateuh _ mandrakesoft.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

package MDK::Wizard::Pxe;
use lib qw(/usr/lib/libDrakX);
use strict;
use common;
use services;
use MDK::Wizard::Wizcommon;

my $wiz = new MDK::Wizard::Wizcommon;

#my $INSTALLDIR = "/var/install/pxe";
#my $IA64PATH = '/IA64PC';

my $TMPDIR = '/tmp';
my $HOSTNAME = chomp_(`hostname`);
my $TFTPDIR = "/var/lib/tftpboot";
my $CLIENTPATH = '/X86PC/linux';
my $X86 = $TFTPDIR . $CLIENTPATH;
my $IMGPATH = $X86 . '/images';
my $PXEHELP = $X86 . '/help.txt';
my $PXEMESSAGE = $X86 . '/messages';
my $PXEDEFAULT = $X86 . '/pxelinux.cfg/default';

my $CONF = '/etc/pxe.conf';
my $SYSLINUXPATH = '/usr/lib/syslinux/';
my $MEMDISK = $SYSLINUXPATH . '/memdisk';
my $XINETDDIR = "/etc/xinetd.d";


my $o = {
	 name => N("PXE Wizard (devel)"),
	 var => {
		 IMG => '/var/install/92/images/network.img',
		 PXENAME => '92',
		 DESCR => 'install 9.2',
		 IMGTOREMOVE => '',
		 IMGTOMODIFY => '',
		 IP => '127.0.0.1',
		 DIR => '/var/install/',
		 i => '',
		},
	 needed_rpm => [ 'pxe', 'tftp-server', 'xinetd' ],
	};

my %level = (
             1 => N("PXE - Set PXE server"),
             2 => N("add - Add boot image in PXE"),
	     3 => N("remove - remove boot image in PXE"),
	     4 => N("Modify - Modify boot image in PXE"),
	    );


# to get list menu entry
my @list_menu;
foreach (cat_($PXEDEFAULT)) {
  my ($ent) = /# TAG: (\w+)_BEGIN/;
  ! $ent or push @list_menu,$ent;
}

#set default list for entry in syslinux.cfg
my @list_method = qw(nfs http);
my @list_ram = qw(32000 64000 1280000);
my @list_vga = qw(788 normal 785 791 text);
my @list_acpi = qw(ht force off);
my @list_apic = qw(apic noapic);
my @list_eth = qw(eth0 eth1 eth2);


# to get list menu entry
my @list_menu;
foreach (cat_($PXEDEFAULT)) {
  my ($ent) = /# TAG: (\w+)_BEGIN/;
  ! $ent or push @list_menu,$ent;
}

#begin of wizard
$o->{pages} = {
	       welcome => {
			   name => N("PXE wizard") . "\n\n" . N("Set a PXE server.") . "\n" . N("This wizard will help you configuring the PXE server. PXE (Pre-boot Execution Environment) is a protocol designed by Intel that allows computers to boot through the network. PXE is stored in the ROM of new generation network cards. When the computer boots up, the BIOS loads the PXE ROM in the memory and executes it. A menu is displayed, allowing the computer to boot an operating system loaded through the network.") . "\n" . N("This wizard will provide a pxe service, and ability to add/remove/modify boot images."),
			   no_back => 1,
			   pre => sub {
			     $o->{var}{wiz_level} ||= 1;
			   },
			   post => sub {
			     if ($o->{var}{wiz_level} == 2) {
			       return 'addimg' }
			     elsif ($o->{var}{wiz_level} == 3) {
			       return 'removeimg' }
			     elsif ($o->{var}{wiz_level} == 4) {
			       return 'modifyimg' }
			   },
			   data => [
				    { label => N("What do you want to do:"), val => \$o->{var}{wiz_level}, list => [ keys %level ], format => sub { $level{$_[0]} } },
				   ],
			   no_back => 1,
			   next => 'pxeserver',
			  },
	       addimg => {
			  name => N("Add a boot image") . "\n\n" . N("Path to image: full path to image (need network boot image)") . "\n\n" . N("PXE name: name in PXE menu (one word/number, no space please)"),
			  data => [
				   { label => "PXE name:", val => \$o->{var}{PXENAME} },
				   { label => "PXE description:", val => \$o->{var}{DESCR} },
				   { label => "Full path to boot image:", val => \$o->{var}{IMG} },
				  ],
			  post => \&test_data,
			  next => 'summaryadd',
			 },
	       removeimg => {
			     name => N("Remove a boot image"). "\n\n" . N("Choose PXE boot image you want to remove from PXE server."),
			     data => [
				      { label => N("Boot image to remove:"), val => \$o->{var}{IMGTOREMOVE}, fixed_list => \@list_menu },
				     ],
			     next => 'summaryremove',
			    },
	       modifyimg => {
			     name => N("Add option to boot image:") . "\n\n" . N("Please choose PXE boot image to modify"),
			     data => [
				      { label => N("Boot image to configure:"), val => \$o->{var}{IMGTOMODIFY}, fixed_list => \@list_menu },
				     ],
			     post => \&read_option,
			     next => 'gomodify',
			    },
	       gomodify => {
			    name => N("Options to add to PXE boot disk") . "\n" . N("Server IP: IP address of server wich contain installation directory. You can create one with MDK install server wizard.") . "\n" . N("Install directory: full path to MDK install server directory") . "\n" . N("Installation method: choose nfs/http to install via nfs/http.") . "\n" . N("Network client interface: through wich interface client should be installed.") . "\n" . N("Ramsize: adjust ramsize on boot disk.") . "\n" . N("VGA option: if you encounter some problem whith VGA, please adjust. ") . "\n" . N("Acpi option: Advanced Configuration and Power Interface"),
			    data => [
				     { label => N("Boot image to modify:"), fixed_val => \$o->{var}{i} },
				     { label => N("Server IP:"), val => \$o->{var}{IP} },
				     { label => N("Install directory:"), val => \$o->{var}{DIR} },
				     { label => N("Installation method:"), val => \$o->{var}{METHOD}, fixed_list => \@list_method },
				     { label => N("Network client interface:"), val => \$o->{var}{ETH}, fixed_list => \@list_eth },
				     { label => N("Ramsize:"), val => \$o->{var}{RAM}, fixed_list => \@list_ram },
				     { label => N("VGA option:"), val => \$o->{var}{VGA}, fixed_list => \@list_vga },
				     { label => N("Acpi option:"), val => \$o->{var}{ACPI}, fixed_list => \@list_acpi },
				     { label => N("Apic option:"), val => \$o->{var}{APIC}, fixed_list => \@list_apic },
				    ],
			    next => 'summarymodify',
			   },
	       pxeserver => {
			     name => N("Set PXE server") . "\n\n" . N("We need to use a special dhcpd.conf with PXE parameter.") . "\n" . N("This will configure all needed default configurations files to set a PXE server."),
			     next => 'summaryserver',
			    },
	       error_img => {
			     name => N('Please provide a bootable image...'),
			     next => 'addimg',
			    },
	       error_name => {
			      name => N('Please provide a correct name in PXE entry (one word)'),
			      next => 'addimg',
			     },
	       simmilar_entry => {
				  name => N('Similar name is already used in PXE menu entry') . "\n\n" . N("Please provide another PXE Menu name"),
				  next => 'addimg',
				 },
	       summaryserver => {
				 name => N('Now will prepare all default files to set the PXE server'),
				 data => [
					  { label => N("Tftp directory:"), fixed_val => \$TFTPDIR },
					  { label => N("Boot image path:"), fixed_val => \$IMGPATH },
					  { label => N("PXE \'default\' file:"), fixed_val => \$PXEDEFAULT },
					  { label => N("PXE \'help\' file:"), fixed_val => \$PXEHELP },
					 ],
				 post => \&do_it_pxe,
				 next => 'endserver',
				},
	       summarymodify => {
				 name => N('Now will modify boot options in image'),
				 data => [
					  { label => N("Boot image to modify:"), fixed_val => \$o->{var}{i} },
					  { label => N("Server IP:"), fixed_val => \$o->{var}{IP} },
					  { label => N("Install directory:"), fixed_val => \$o->{var}{DIR} },
					  { label => N("Installation method:"), fixed_val => \$o->{var}{METHOD} },
					  { label => N("Network client interface:"), fixed_val => \$o->{var}{ETH} },
					  { label => N("Ramsize:"), fixed_val => \$o->{var}{RAM} },
					  { label => N("VGA option:"), fixed_val => \$o->{var}{VGA} },
					  { label => N("Acpi option:"), fixed_val => \$o->{var}{ACPI} },
					  { label => N("Apic option:"), fixed_val => \$o->{var}{APIC} },
					 ],
				 post => \&do_it_modify,
				 next => 'endmodify',
				},
	       summaryremove => {
				 name => N('Now will remove your PXE boot image'),
				 data => [
					  { label => N("PXE entry to remove:"), fixed_val => \$o->{var}{IMGTOREMOVE} },
					 ],
				 post => \&do_it_remove,
				 next => 'endremove',
				},
	       summaryadd => {
			      name => N('Now will add your PXE boot image'),
				 data => [
					  { label => "PXE name:", fixed_val => \$o->{var}{PXENAME} },
					  { label => "PXE description:", fixed_val => \$o->{var}{DESCR} },
					  { label => "Path to boot image:", fixed_val => \$o->{var}{IMG} },
					 ],
			      post => \&do_it_add,
			      next => 'endadd',
			     },
	       endadd => {
			     name => N('Congratulations'),
			     data => [ { label => N('The wizard successfully add a PXE boot image.') } ],
                             next => 'welcome',
			    },
	       endremove => {
			     name => N('Congratulations'),
			     data => [ { label => N('The wizard successfully remove a PXE boot image.') } ],
                             next => 'welcome',
			    },
	       endmodify => {
			     name => N('Congratulations'),
			     data => [ { label => N('The wizard successfully modify image(s).') } ],
                             next => 'welcome',
			    },
	       endserver => {
			     name => N('Congratulations'),
			     data => [ { label => N('The wizard successfully configured your PXE server.') } ],
                             no_back => 1,
                             end => 1,
                             next => 0
			    },
	      };


#cp memlinux from syslinux
sub memlinux_prep {
  if (!-f "$X86/memdisk") {
    cp_af($MEMDISK, $X86);
  }
}

# test img and similar entry in PXE
sub test_data {
  $o->{var}{PXENAME} =~ /^\w+$/ or return 'error_name';
  if (!-f $o->{var}{IMG}) {
    return 'error_img'
  }
  if (any { /^$o->{var}{PXENAME}/ } cat_($PXEHELP)) {
    return 'simmilar_entry'
  }
}

# enable tftp server
sub enable_tftps {
  substInFile { s/disable.*/disable = no/ } "$XINETDDIR/tftp";
}

# can change option in tftp server
sub tftp_blksize {
  # $o should be with W or not N
  my ($o) = @_;
  if ($o =~ /W/) {
    substInFile { s/server_args.*/server_args = -r blksize -s $TFTPDIR/ } "$XINETDDIR/tftp";
  } else {
    substInFile { s/server_args.*/server_args = -s $TFTPDIR/ } "$XINETDDIR/tftp";
  }
}


sub crea_wdir {
  if (-e $TMPDIR) { rm_rf($TMPDIR);
	     }
  mkdir_p($TMPDIR);
}

# add TAGGED entry in PXE menu 
sub add_in_default {
  my ($NAME) = @_;
  if (!any { /${NAME}_BEGIN/ } cat_($PXEDEFAULT)) {
    append_to_file($PXEDEFAULT ,<<EOF);
# TAG: ${NAME}_BEGIN
label $NAME
      KERNEL memdisk
      APPEND initrd=images/$NAME.img
# TAG: ${NAME}_END
EOF
  }
}

# add entry in Help.txt of  PXE
sub add_in_help {
  my ($NAME, $DESCR) = @_;
  append_to_file($PXEHELP ,<<EOF);
$NAME : $DESCR
EOF
}

# add bootable image in correct place
sub add_img {
  my ($SIMG, $PXENAME) = @_;
  cp_af($SIMG, $IMGPATH . "/" . $PXENAME . '.img');
}

# remove entry in PXE menu
sub remove_in_menu {
  my ($NAME) = @_;
  my $conf = cat_($PXEDEFAULT) . "#EndOfFile";
  my ($begin, $NAME_bloc, $end) = $conf =~ /(.*?)(# TAG: ${NAME}_BEGIN.*?# TAG: ${NAME}_END)\n(.*)#EndOfFile/s or die "unable to find Menu entry section";
  output($PXEDEFAULT, $begin, $end);
}

# get list of available PXE boot images
sub list_menu {
  my @list_menu;
  foreach (cat_($PXEDEFAULT)) {
    my ($ent) = /\# TAG: (\w+)_BEGIN/;
    ! $ent or push @list_menu,$ent; #print "$ent\n";
  }
  @list_menu;
}

# remove entry in help.txt
sub remove_in_help {
  my ($NAME) = @_;
  substInFile {
    s/^$NAME\s:.*//x;
    s/^\s*$//;
  } $PXEHELP;
}

sub remove_img {
  my ($NAME) = @_;
  rm_rf($IMGPATH . "/" . $NAME . '.img');
}

sub save_config {
  my ($FILE) = @_;
  if (!-f "$FILE.ori") {
    cp_af($FILE, "$FILE.ori");
  }
}

# set default help.txt file
sub default_pxe_menu {
  save_config($PXEHELP);
  output($PXEHELP, <<EOF);
Available images are:
---------------------
local: local boot
EOF

  save_config($PXEDEFAULT);
  output($PXEDEFAULT, <<EOF);
PROMPT 1
DEFAULT local
DISPLAY messages
TIMEOUT 50
F1 help.txt
label local
      LOCALBOOT 0

EOF
}

# set default pxe messages
sub default_pxe_messages {
  save_config($PXEMESSAGE);
  output($PXEMESSAGE, <<EOF);

                   Welcome to Mandrake Linux PXE Server
                                                       Pxelinux
              .              .-----------------------------------.
             /|\\            /    Press F1 for available images    \\
            /_|_\\           \\    Hosted by  $HOSTNAME
            \\ | /   _       /'-----------------------------------'
             \\|/   (')     /
              '.    U     /                                (O__
                 .   '.  /                 (o_  (o_  (0_   //\\
                 {o_   (o_  (o_  (o_  (o_  //\\  //\\  //\\  //  )
                 (')_  (`)_ (/)_ (/)_ (/)_ V_/_ V_/_ V_/_ V__/_
            ---------------------------------------------------------

 press F1 for help
EOF

}

# main add image in PXE menu
sub do_it_add {
  return if $::testing;
  add_in_help($o->{var}{PXENAME}, $o->{var}{DESCR});
  add_in_default($o->{var}{PXENAME});
  add_img($o->{var}{IMG}, $o->{var}{PXENAME});
}

# main remove image
sub do_it_remove {
  return if $::testing;
  remove_in_menu($o->{var}{IMGTOREMOVE});
  remove_in_help($o->{var}{IMGTOREMOVE});
  remove_img($o->{var}{IMGTOREMOVE});
}

# get default option for an image
sub read_option {
  my ($IMG) = $o->{var}{IMGTOMODIFY};
  my $mount = "/tmp/loop_for_images";
  mkdir_p($mount);
  system("mount $IMGPATH/$IMG.img $mount -o loop");
  my $line = cat_("$mount/syslinux.cfg");
  $o->{var}{i} = "$IMGPATH/$IMG.img";
  ($o->{var}{METHOD}, $o->{var}{ETH}, $o->{var}{IP}, $o->{var}{DIR}, $o->{var}{RAM}, $o->{var}{VGA}, $o->{var}{ACPI}, $o->{var}{APIC}) = $line =~ /method:(nfs|http),interface:(eth0|eth1|eth2),network:dhcp,server:(.*?),directory:(.*?) ramdisk_size=(.*?) root=\/dev\/ram3 rw vga=(.*?)acpi=(ht|force|off)\s(apic|noapic)/;
  system("umount $mount");
  if (-e $mount) {
    rm_rf($mount);
  }
}

# modify default boot option of an image
sub do_it_modify {
  my ($IMG, $METHOD, $ETH, $IP, $DIR, $RAM, $VGA, $ACPI, $APIC) = ($o->{var}{IMGTOMODIFY}, $o->{var}{METHOD}, $o->{var}{ETH}, $o->{var}{IP}, $o->{var}{DIR}, $o->{var}{RAM}, $o->{var}{VGA}, $o->{var}{ACPI}, $o->{var}{APIC});
  $o->{var}{i} = "$IMGPATH/$IMG.img";
  return if $::testing;
#APPEND initrd=images/ken/cooker/i586/isolinux/alt0/all.rdz automatic=method:nfs,interface:eth0,network:dhcp,server:192.168.100.7,directory:/c/cooker ramdisk_size=32000 root=/dev/ram3 rw vga=788 meta_class=discovery
  my $mount = "/tmp/loop_for_images";
  mkdir_p($mount);
  system("mount $o->{var}{i} $mount -o loop");
  output("$mount/syslinux.cfg", <<EOF);
default linux
prompt 1
timeout 72
display boot.msg
F1 help.msg
F2 advanced.msg
F3 boot.msg
label linux
  kernel vmlinuz
  append initrd=network.rdz automatic=method:$METHOD,interface:$ETH,network:dhcp,server:$IP,directory:$DIR ramdisk_size=$RAM root=/dev/ram3 rw vga=$VGA acpi=$ACPI $APIC
EOF

  system("umount $mount");
  if (-e $mount) {
    rm_rf($mount);
  }
}

# set PXE server
sub do_it_pxe {
  return if $::testing;
  my $in = 'interactive'->vnew('su', 'PXE server');
  my $w = $in->wait_message(N("PXE server"), N("Configuring PXE server on your system..."));
  mkdir_p($IMGPATH);
  memlinux_prep();
  default_pxe_menu();
  default_pxe_messages();
  enable_tftps();
  tftp_blksize('N');
  map { system("service $_ restart"); $_ } qw(xinetd pxe);
  undef $w;
}


sub new {
    my ($class, $conf) = @_;
    bless {
            o   => $o,
	   }, $class;
}

1;