-#!/usr/bin/env perl
-#
-# D-Link DSL-502T flash utility
-#
-# Copyright (c) 2007 Oliver Jowett <oliver@opencloud.com>
-#
-# Based on adam2flash.pl for the D-Link DSL-G6x4T, which is:
-# Copyright (C) 2005 Felix Fietkau <mailto@nbd.name>
-# based on fbox recovery util by Enrik Berkhan
-#
-# 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
-#
-
-# The default DSL-502T mtd map looks like this:
-#
-# mtd0 0x90091000,0x903f0000 # filesystem
-# mtd1 0x90010090,0x90091000 # kernel
-# mtd2 0x90000000,0x90010000 # bootloader - DO NOT MODIFY
-# mtd3 0x903f0000,0x90400000 # config space - DO NOT MODIFY
-# mtd4 0x90010000,0x903f0000 # firmware signature + kernel + filesystem, used to flash new firmware
-#
-# i.e. the flash layout is:
-#
-# 90000000-9000FFFF mtd2 bootloader
-# 90010000-9001008F ---- firmware signature )
-# 90010090-90090FFF mtd1 kernel ) mtd4 spans these three regions
-# 90091000-903EFFFF mtd0 filesystem )
-# 903F0000-903FFFFF mtd3 config space
-#
-# The ADAM2 bootloader uses the mtd1 settings to find the start of the image to boot.
-# The image to load contains information about the loadable size of the image. If ADAM2 sees
-# that the image appears to extend beyond the end of mtd1, it will refuse to load it. On
-# the DSL-502T, this manifests as the USB light blinking rapidly on boot.
-#
-# The OpenWRT kernel does not follow quite the same layout:
-# (a) it does not have a 0x90-byte firmware signature prefix
-# (b) it is larger than the default mtd1 size
-#
-# (a) would be avoidable (build a custom image with a 0x90-byte prefix) but (b) is unavoidable.
-# So we *have* to change mtd1. The simplest thing to do seems to make it span all of
-# the flashable area, producing this layout:
-#
-# mtd0 0x90091000,0x903f0000 # filesystem
-# mtd1 0x90010000,0x903f0000 # kernel (CHANGED)
-# mtd2 0x90000000,0x90010000 # bootloader - DO NOT MODIFY
-# mtd3 0x903f0000,0x90400000 # config space - DO NOT MODIFY
-# mtd4 0x90010000,0x903f0000 # kernel + filesystem, used to flash new firmware
-#
-# *** NOTE NOTE NOTE NOTE ***
-#
-# /dev/mtd0 .. /dev/mtd4 when using OpenWRT do **NOT** correspond to the ADAM2 mtd0-4 settings!
-# Instead, OpenWRT scans the MTD itself and determines its own boundaries which are arranged
-# quite differently to ADAM2. It will look something like this, see dmsg on boot:
-#
-# (/dev/mtd0) 0x00000000-0x00010000 : "loader" # Bootloader, read-only
-# (/dev/mtd1) 0x003f0000-0x00400000 : "config" # Config space
-# (/dev/mtd2) 0x00010000-0x003f0000 : "linux" # Firmware area (kernel + root fs + JFFS area)
-# (/dev/mtd3) 0x000d0d58-0x003f0000 : "rootfs" # Root FS, starts immediately after kernel
-# (/dev/mtd4) 0x00280000-0x003f0000 : "rootfs_data" # If rootfs is squashfs, start of JFFS area.
-#
-# All of those boundaries are autodetected by examining the data in flash.
-#
-# *** NOTE NOTE NOTE NOTE ***
-
-use IO::Socket::INET;
-use Socket;
-use strict;
-use warnings;
-
-sub usage() {
- print STDERR "Usage: $0 <ip> [-setmtd1] [-noflash] [firmware.bin]\n\n";
- print STDERR "Acquires the ADAM2 bootloader of a D-Link DSL-504T at <ip>\n";
- print STDERR "Power off the device, start this script, then power it on.\n";
- print STDERR "<ip> may be any spare address on the local subnet.\n\n";
- print STDERR "If a firmware file is specified, MTD settings are verified and\n";
- print STDERR "then the firmware is written to the router's flash.\n";
- print STDERR "The firmware type (D-Link or OpenWRT) is automatically detected.\n\n";
- print STDERR " -setmtd1 update mtd1 if it is not the appropriate value for this firmware\n";
- print STDERR " -noflash does normal checks, updates mtd1 if requested, but does not actually write firmware\n\n";
- exit 0;
-}
-
-my $ip = shift @ARGV;
-$ip and $ip =~ /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/ or usage();
-
-my $probe = IO::Socket::INET->new(Proto => 'udp',
- Broadcast => 1,
- LocalPort => 5035) or die "socket: $!";
-my $setip = unpack("N", inet_aton($ip));
-$setip > 0 or usage();
-
-my @packets;
-foreach my $ver ([18, 1], [22, 2]) {
- push @packets, pack("vCCVNV", 0, @$ver, 1, $setip, 0);
-}
-print STDERR "Looking for device: ";
-my $broadcast = sockaddr_in(5035, INADDR_BROADCAST);
-my $scanning;
-my $box;
-
-$SIG{"ALRM"} = sub {
- return if --$scanning <= 0;
- foreach my $packet (@packets) {
- $probe->send($packet, 0, $broadcast);
- }
- print STDERR ".";
-};
-
-$scanning = 15;
-foreach my $packet (@packets) {
- $probe->send($packet, 0, $broadcast);
-}
-print STDERR ".";
-
-while($scanning) {
- my $reply;
-
- alarm(1);
- if (my $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) {
- $scanning = 0;
- printf STDERR " found!\nADAM2 version $major.$minor1.$minor2 at %s (%s)\n", inet_ntoa($addr), inet_ntoa($addr2);
- $box = inet_ntoa($addr);
- }
- }
-}
-
-$box or die " not found!\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 _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;
- }
-}
-
-my $file;
-my $arg;
-my $noflash = 0;
-my $setmtd1 = 0;
-while ($arg = shift @ARGV) {
- if ($arg eq "-noflash") { $noflash = 1; }
- elsif ($arg eq "-setmtd1") { $setmtd1 = 1; }
- else { $file = $arg; }
-}
-
-if (!$file) {
- print STDERR "No firmware file specified, exiting.\n";
- exit 0;
-}
-
-#
-# Firmware checks
-#
-
-open FILE, "<$file" or die "can't open firmware file\n";
-
-# D-Link firmware starts with "MTD4" little-endian, then has an image header at 0x90
-# OpenWRT firmware just starts with an image header at 0x00
-
-my $signature;
-my $sbytes = read FILE, $signature, 4;
-($sbytes == 4) or die "can't read firmware signature: $!";
-
-my $expectedmtd4 = "0x90010000,0x903f0000";
-my $fwtype;
-my $expectedmtd1;
-
-if ($signature eq "4DTM") {
- seek FILE, 0x90, 0 or die "can't read firmware signature: $!";
- $sbytes = read FILE, $signature, 4;
- ($sbytes == 4) or die "can't read firmware signature: $!";
- if ($signature eq "\x42\xfa\xed\xfe") {
- $fwtype = "D-Link (little-endian)";
- $expectedmtd1 = "0x90010090,0x90091000";
- } elsif ($signature eq "\xde\xad\xbe\x42") {
- $fwtype = "D-Link (big-endian)";
- $expectedmtd1 = "0x90010090,0x90091000";
- }
-} elsif ($signature eq "\x42\xfa\xed\xfe") {
- $fwtype = "OpenWRT (little-endian)";
- $expectedmtd1 = "0x90010000,0x903f0000";
-} elsif ($signature eq "\xde\xad\xbe\x42") {
- $fwtype = "OpenWRT (big-endian)";
- $expectedmtd1 = "0x90010000,0x903f0000";
-}
-
-$fwtype or die "Unknown firmware signature (are you sure that's the right firmware?)";
-print STDERR "Firmware type: $fwtype\n";
-
-#
-# Bootloader login
-#
-
-print STDERR "logging into ADAM2 bootloader.. ";
-my $ftp = ADAM2FTP->new($box, Debug => 0, Timeout => 600) or die "can't open control connection\n";
-$ftp->login("adam2", "adam2") or die "can't login\n";
-print STDERR "ok.\n";
-
-#
-# Hardware checks
-#
-
-print STDERR "checking hardware.. ";
-my $prd = $ftp->getenv("ProductID");
-my $usb = $ftp->getenv("usb_prod");
-print STDERR "$prd / $usb.\n";
-($prd eq "AR7RD" || $prd eq "AR7DB") or die "doesn't look like a DSL-502T?";
-($usb eq "DSL-502T") or die "doesn't look like a DSL-502T?";
-
-#
-# MTD checks and update
-#
-
-print STDERR "checking MTD settings.. ";
-
-my $mtd4 = $ftp->getenv("mtd4");
-($mtd4 eq $expectedmtd4) or die "MTD4 was not as expected (should be '$expectedmtd4', was '$mtd4'). Cowardly refusing to do anything about it!";
-
-# check MTD1 setting and update if needed
-my $mtd1 = $ftp->getenv("mtd1");
-if ($mtd1 ne $expectedmtd1) {
- die "MTD1 was not as expected (should be '$expectedmtd1', was '$mtd1'). Run with -setmtd1 to reset mtd1" unless ($setmtd1);
- print STDERR "Setting mtd1.. ";
- ($ftp->command("SETENV","mtd1,$expectedmtd1")->response() == Net::FTP::CMD_OK) or die "can't set mtd1";
- $file = shift @ARGV;
-}
-
-print STDERR "ok.\n";
-
-#
-# Firmware size check
-#
-
-my $fwsize = (stat(FILE))[7];
-printf STDERR "Firmware size: 0x%08x\n", $fwsize;
-my $flashsize;
-$mtd4 =~ /^(0x\w+),(0x\w+)$/ and $flashsize = hex($2) - hex($1);
-printf STDERR "Available flash space: 0x%08x\n", $flashsize;
-die "firmware is too large" if ($flashsize < $fwsize);
-
-#
-# Flash it!
-#
-
-if ($noflash) {
- print STDERR "Not flashing firmware as -noflash was specified.\n";
- exit 0;
-}
-
-seek FILE, 0, 0, or die "can't seek in firmware: $!";
-
-print STDERR "Preparing to flash.. ";
-($ftp->command("MEDIA FLSH")->response() == Net::FTP::CMD_OK) or die "can't set MEDIA FLSH";
-$ftp->binary() or die "can't set binary mode";
-print STDERR "ok.\n";
-print STDERR "Erasing flash and establishing data connection (this may take a while): ";
-
-my $dc = $ftp->stor("fs mtd4");
-$dc or die "can't open data connection: $!\n";
-print STDERR "ok.\n";
-
-print STDERR "Writing firmware: ";
-while ($fwsize > 0) {
- my $buffer;
- my $len = ($fwsize > 1024 ? 1024 : $fwsize);
-
- my $rbytes = read FILE, $buffer, $len;
- ($rbytes < 0) and die "read error on firmware file: $!";
- ($rbytes == $len) or die "short read on firmware file ($rbytes < $len)";
-
- my $wbytes = $dc->write($buffer, $len, 600);
- ($wbytes < 0) and die "write error on FTP data connection: $!";
- ($rbytes == $wbytes) or die "short write on FTP data connection ($wbytes < $rbytes)";
-
- $fwsize -= $len;
- print STDERR ".";
-}
-
-$dc->close();
-print STDERR " done.\n";
-
-#
-# Reboot
-#
-
-print STDERR "Rebooting device.\n";
-$ftp->reboot();
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