Simple fbox recovery tool
Aus Zebradem WIKI
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#! /usr/bin/perl
#
# simple fbox recovery tool
#
# Copyright (C) 2004,2005 Enrik Berkhan <enrik.berkhan@inka.de>
#
# 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 of the License, 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
#
use IO::Socket::INET;
use IO::Select;
use Socket;
use Getopt::Std;
use Errno qw(EEXIST);
use Net::FTP;
use Fcntl qw(SEEK_END SEEK_SET);
my $do_crc = 1;
BEGIN {
eval { require Compress::Zlib };
if ($@) {
eval { require String::CRC32 };
if ($@) {
print STDERR "No crc32() implementation available!\nInstall Compress::Zlib or String::CRC32 if you want CRC support.\n";
$do_crc = 0;
} else {
import String::CRC32 qw(crc32);
}
} else {
import Compress::Zlib qw(crc32);
}
}
use warnings;
$| = 1;
my %opt;
getopts('hrf:i:l:s:u', \%opt);
if ($opt{h}) {
print "usage: recover -h\n";
print " recover [-l IPADDR] [-i IPADDR] [-f firmeware.image] [-r]\n";
print " recover [-l IPADDR] [-i IPADDR] -s image\n";
print " recover [-l IPADDR] [-i IPADDR] -u\n";
print " -i IPADDR: set boot time IP to IPADDR within environment\n";
print " -l IPADDR: choose local addr (for multihomed)\n";
print " -f image: extract fs and kernel from tarfile and flash\n";
print " -s image: boot (standalone) image directly from RAM\n";
print " -r: reboot fbox\n";
print " -u: update box with filesystem.img, kernel.img from cwd\n";
exit;
}
my $ipaddr;
my $setip;
if ($opt{i}) {
$setip = unpack("N", inet_aton($opt{i}));
} else {
$setip = 0;
}
$opt{l} = "0.0.0.0" unless defined $opt{l};
my $probe = IO::Socket::INET->new(Proto => 'udp',
Broadcast => 1,
LocalAddr => $opt{l},
LocalPort => 5035) or die "socket: $!";
my $sel = IO::Select->new($probe);
my $packet = pack("vCCVNV", 0, 18, 1, 1, 0, 0);
my $broadcast = sockaddr_in(5035, INADDR_BROADCAST);
$probe->send($packet, 0, $broadcast);
scan_again:
print "Looking for Fritz!Box ";
@boxes = ();
$scanning = 10;
print "o";
while($scanning) {
my $reply;
my @ready;
if (@ready = $sel->can_read(0.2)) {
$peer = $probe->recv($reply, 16);
next if (length($reply) < 16);
my ($port, $addr) = sockaddr_in($peer);
my ($major, $minor1, $minor2, $code, $addr2) = unpack("vCCVV", $reply);
$addr2 = pack("N", $addr2);
if ($code == 2) {
print "O";
push @boxes, [$major, $minor1, $minor2, $addr, $addr2];
$scanning = 2 if ($scanning > 2);
}
} else {
$scanning--;
if (scalar @boxes == 0) {
$probe->send($packet, 0, $broadcast);
print "o";
} else {
print ".";
}
}
}
if (scalar @boxes == 0) {
print " none found, giving up.\n";
exit 1;
} else {
print " found!\n";
}
foreach $box (@boxes) {
my ($major, $minor1, $minor2, $addr, $addr2) = @$box;
printf "ADAM2 version $major.$minor1.$minor2 at %s (%s)\n",
inet_ntoa($addr), inet_ntoa($addr2);
}
if (scalar @boxes > 1) {
print "more than one boxes: no work\n";
exit 1;
}
$ipaddr = (@{$boxes[0]})[4];
if (!$ipaddr && !$setip) {
print "box has no ip, giving up\n";
exit 1;
}
if ($setip) {
if ($setip != unpack('N', $ipaddr)) {
print "setting ip address\n";
my $setpacket = pack("vCCVNV", 0, 18, 1, 1, $setip, 0);
$probe->send($setpacket, 0, $broadcast);
goto scan_again;
} else {
print "ip already ok\n";
}
}
{
package ADAM2FTP;
use base qw(Net::FTP);
# ADAM2 requires upper case commands, some brain dead firewall doesn't ;-)
sub _USER { shift->command("USER",@_)->response() }
sub _PASV { shift->command("P\@SW")->response() == Net::FTP::CMD_OK }
sub _GETENV {
my $ftp = shift;
my ($ok, $name, $value);
$ftp->command("GETENV",@_);
while(length($ok = $ftp->response()) < 1) {
my $line = $ftp->getline();
unless (defined($value)) {
chomp($line);
($name, $value) = split(/\s+/, $line, 2);
}
}
$ftp->debug_print(0, "getenv: $value\n")
if $ftp->debug();
return $value;
}
sub getenv {
my $ftp = shift;
my $name = shift;
return $ftp->_GETENV($name);
}
sub _REBOOT { shift->command("REBOOT")->response() == Net::FTP::CMD_OK }
sub reboot {
my $ftp = shift;
$ftp->_REBOOT;
$ftp->close;
}
sub check {
my $ftp = shift;
delete ${*$ftp}{'net_ftp_port'};
delete ${*$ftp}{'net_ftp_pasv'};
my $data = $ftp->_data_cmd('CHECK' ,@_) or return undef;
my $sum;
if (${${*$ftp}{'net_cmd_resp'}}[0] =~ /^Flash check 0x([0-9A-F]{8})/) {
$sum = hex($1);
}
$data->_close();
return $sum;
}
}
# passive mode geht mit Net::FTP nicht, connected zu spaet fuer ADAM2!
$ftp = ADAM2FTP->new(inet_ntoa($ipaddr), Passive => 0, Debug => 0, Timeout => 600)
or die "can't FTP ADAM2";
$ftp->login("adam2", "adam2") or die "can't login adam2";
$ftp->binary();
my $pid = $ftp->getenv('ProductID');
my $hwrev = $ftp->getenv('HWRevision');
my $fwrev = $ftp->getenv('firmware_info');
my $ulrev = $ftp->getenv('urlader-version');
print "Product ID: $pid\n";
print "Hardware Revision: $hwrev\n";
print "Urlader Revision: $ulrev\n";
print "Firmware Revision: $fwrev\n";
$ftp->hash(\*STDOUT, 64 * 1024);
$mtd0 = "filesystem.image";
$mtd1 = "kernel.image";
if ($opt{f}) {
unless (-f $opt{f}) {
die "$opt{f} not found\n";
}
mkdir "recover.tmp";
if ($! && $! != EEXIST) { die "recover.tmp: $!" };
unless(substr($opt{f}, 0, 1) eq '/') {
$opt{f} = "../$opt{f}";
}
system("busybox tar xf $opt{f} -C recover.tmp ./var/tmp/kernel.image ./var/tmp/filesystem.image");
if ($? >> 8) {
die "busybox tar failed";
} elsif ($? & 127) {
die "busybox tar killed";
}
chmod 0644, "recover.tmp/var/tmp/filesystem.image",
"recover.tmp/var/tmp/kernel.image";
$mtd0 = "recover.tmp/var/tmp/filesystem.image";
$mtd1 = "recover.tmp/var/tmp/kernel.image";
}
if ($opt{f} || $opt{u}) {
$ftp->quot("MEDIA", "FLSH");
if (-f $mtd0) {
$sum = remove_cksum($mtd0, 0x300000);
$opt{r} = 1;
print "Flashing $mtd0 to mtd0 ...";
$ftp->put($mtd0, "1 mtd0");
if ($ftp->status() == $ftp->CMD_OK) {
if (defined $sum) {
my $flashsum = $ftp->check("1 mtd0");
if (defined $flashsum && $sum eq $flashsum) {
print "checksum ok!\n";
} else {
print "checksum bad!\n";
}
}
print "success!\n";
} else {
print "FAILED: ", $ftp->code(), " ", $ftp->message(), "\n";
$opt{r} = 0;
}
}
if (-f $mtd1) {
$sum = remove_cksum($mtd1, 0xb0000);
print "Flashing $mtd1 to mtd1 ...";
$ftp->put($mtd1, "1 mtd1");
if ($ftp->status() == $ftp->CMD_OK) {
if (defined $sum) {
my $flashsum = $ftp->check("1 mtd1");
if (defined $flashsum && $sum eq $flashsum) {
print "checksum ok!\n";
} else {
print "checksum bad!\n";
}
}
print "success!\n";
} else {
print "FAILED: ", $ftp->code(), " ", $ftp->message(), "\n";
$opt{r} = 0;
}
}
} elsif ($opt{s}) {
print "Sending and booting $opt{s}...";
$ftp->quot("MEDIA", "SDRAM");
$ftp->put("$opt{s}", "1 mtd4");
if ($ftp->status() == $ftp->CMD_OK) {
print "success!\n";
$ftp->close();
exit;
} else {
print "FAILED: ", $ftp->code(), " ", $ftp->message(), "\n";
$opt{r} = 0;
}
}
if ($opt{r}) {
print "Rebooting...\n";
$ftp->reboot();
} else {
$ftp->quit();
}
END {
if ($opt{f}) {
unlink("recover.tmp/var/tmp/kernel.image");
unlink("recover.tmp/var/tmp/filesystem.image");
rmdir("recover.tmp/var/tmp");
rmdir("recover.tmp/var");
rmdir("recover.tmp");
}
}
sub remove_cksum {
my $name = shift;
my $mtdsize = shift;
open F, "+<$name" or die "open: $!";
$size = (stat F)[7];
die "stat: $!" unless defined($size);
if ($size >= 8) {
seek F, -8, SEEK_END or die "seek: $!";
read F, $magic, 4;
read F, $chksum, 4;
if (unpack("V", $magic) == 0xC453DE23) {
$size -= 8;
truncate F, $size or die "truncate: $!";
print "$name: removed checksum\n";
} else {
print "$name: no checksum\n";
}
seek F, 0, SEEK_SET or die "seek: $!";
$chksum = crc32(*F);
$chksum = crc32("\xff" x ($mtdsize - $size), $chksum);
printf "CRC32: %08X\n", $chksum;
return $chksum;
}
return undef;
}
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