mirror of
git://git.openwrt.org/openwrt/openwrt.git
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1127 lines
33 KiB
C
1127 lines
33 KiB
C
/*
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WRT350Nv2-Builder 2.4 (previously called buildimg)
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Copyright (C) 2008-2009 Dirk Teurlings <info@upexia.nl>
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Copyright (C) 2009-2011 Matthias Buecher (http://www.maddes.net/)
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A lot of thanks to Kaloz and juhosg from OpenWRT and Lennert Buytenhek from
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marvell for helping me figure this one out. This code is based on bash
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scripts wrote by Peter van Valderen so the real credit should go to him.
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This program reads the provided parameter file and creates an image which can
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be used to flash a Linksys WRT350N v2 from stock firmware.
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The trick is to fill unused space in the bin file with random, so that the
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resulting zip file passes the size check of the stock firmware.
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The parameter file layout for an original Linksys firmware:
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:kernel 0x001A0000 /path/to/uImage
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:rootfs 0 /path/to/root.squashfs
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:u-boot 0 /path/to/u-boot.bin
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#version 0x2020
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Additionally since v2.4 an already complete image can be used:
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:image 0 /path/to/openwrt-wrt350nv2-[squashfs|jffs2-64k].img
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args:
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1 wrt350nv2.par parameter file describing the image layout
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2 wrt350nv2.img output file for linksys style image
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A u-boot image inside the bin file is not necessary.
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The version is not important.
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The name of the bin file is not important, but still "wrt350n.bin" is used to
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keep as close as possible to the stock firmware.
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Linksys assumes that no mtd will be used to its maximum, so the last 16 bytes
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of the mtd are abused to define the length of the next mtd content (4 bytes for
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size + 12 pad bytes).
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At the end of "rootfs" additional 16 bytes are abused for some data and a
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highly important eRcOmM identifier, so the last 32 bytes of "rootfs" are abused.
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At the end of "u-boot" 128 bytes are abused for some data, a checksum and a
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highly important sErCoMm identifier.
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This program uses a special GNU scanf modifier to allocate
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sufficient memory for a strings with unknown length.
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See http://www.kernel.org/doc/man-pages/online/pages/man3/scanf.3.html#NOTES
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To extract everything from a Linksys style firmware image see
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https://forum.openwrt.org/viewtopic.php?pid=92928#p92928
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Changelog:
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v2.4 - added ":image" definition for parameter file, this allows
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to use a complete sysupgrade image without any kernel size check
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v2.3 - allow jffs by adding its magic number (0x8519)
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added parameter option -i to ignore unknown magic numbers
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v2.2 - fixed checksum byte calculation for other versions than 0x2019
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fixed rare problem with padsize
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updated info to stock firmware 2.00.20
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fixed typos
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v2.1 - used "wrt350n.bin" for the created image (closer to stock)
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added option to create the image in two separate steps (-b / -z)
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v2.0 - complete re-write
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*/
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// includes
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#define _GNU_SOURCE // for GNU's basename()
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#include <assert.h>
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#include <errno.h> // errno
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#include <stdarg.h>
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#include <stdio.h> // fopen(), fread(), fclose(), etc.
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#include <stdlib.h> // system(), etc.
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#include <string.h> // basename(), strerror(), strdup(), etc.
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#include <unistd.h> // optopt(), access(), etc.
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#include <libgen.h>
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#include <sys/wait.h> // WEXITSTATUS, etc.
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// custom includes
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#include "md5.h" // MD5 routines
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#include "upgrade.h" // Linksys definitions from firmware 2.0.19 (unchanged up to 2.0.20)
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// version info
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#define VERSION "2.4"
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char program_info[] = "WRT350Nv2-Builder v%s by Dirk Teurlings <info@upexia.nl> and Matthias Buecher (http://www.maddes.net/)\n";
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// verbosity
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#define DEBUG 1
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#define DEBUG_LVL2 2
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int verbosity = 0;
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// mtd info
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typedef struct {
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char *name;
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int offset;
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int size;
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char *filename;
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long int filesize;
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unsigned char magic[2];
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} mtd_info;
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mtd_info mtd_kernel = { "kernel", 0, 0, NULL, 0L, { 0, 0 } };
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mtd_info mtd_rootfs = { "rootfs", 0, 0, NULL, 0L, { 0, 0 } };
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mtd_info mtd_image = { "image", 0, 0, NULL, 0L, { 0, 0 } };
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mtd_info mtd_uboot = { "u-boot", 0, 0, NULL, 0L, { 0, 0 } };
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#define ROOTFS_END_OFFSET 0x00760000
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#define ROOTFS_MIN_OFFSET 0x00640000 // should be filled up to here, to make sure that the zip file is big enough to pass the size check of the stock firmware
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// 2.0.17: filled up to 0x00640000
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// 2.0.19: filled up to 0x00670000
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// 2.0.20: filled up to 0x00670000
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// rootfs statics via: hexdump -v -e '1/1 "0x%02X, "' -s 0x0075FFE0 -n 16 "wrt350n.bin" ; echo -en "\n"
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unsigned char product_id[] = { 0x00, 0x03 }; // seems to be a fixed value
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unsigned char protocol_id[] = { 0x00, 0x00 }; // seems to be a fixed value
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unsigned char fw_version[] = { 0x20, 0x20 };
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unsigned char rootfs_unknown[] = { 0x90, 0xF7 }; // seems to be a fixed value
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unsigned char sign[] = { 0x65, 0x52, 0x63, 0x4F, 0x6D, 0x4D, 0x00, 0x00 }; // eRcOmM
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// u-boot statics via: hexdump -v -e '1/1 "0x%02X, "' -s 0x007FFF80 -n 128 "wrt350n.bin" ; echo -en "\n"
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//unsigned char sn[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // (12) seems to be an unused value
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//unsigned char pin[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // (8) seems to be an unused value
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//unsigned char node[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // (25) seems to be an unused value
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// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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//unsigned char checksum[] = { 0xE9 }; // (1) is calculated, does it belong to node?
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unsigned char pid[] = { 0x73, 0x45, 0x72, 0x43, 0x6F, 0x4D, 0x6D, 0x00, 0x01, 0x00, 0x00, 0x59, 0x42, 0x50, 0x00, 0x01, // (70) seems to be a fixed value, except for fw version
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0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, // protocol id?
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, // protocol id?
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0x12, 0x34, // firmware version, same as in rootfs
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0x00, 0x00, 0x00, 0x04,
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0x73, 0x45, 0x72, 0x43, 0x6F, 0x4D, 0x6D }; // sErCoMm
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// img statics via: hexdump -v -e '1/1 "0x%02X, "' -s 0 -n 512 "WRT350N-EU-ETSI-2.00.19.img" ; echo -en "\n" (unchanged up to 2.0.20)
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unsigned char img_hdr[] = { 0x00, 0x01, 0x00, 0x00, 0x59, 0x42, 0x50, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
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0x00, 0x00,
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0x12, 0x34, // firmware version, same as in rootfs
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0x00, 0x00, 0x00, 0x04, 0x61, 0x44, 0x6D, 0x42, 0x6C, 0x4B, 0x3D, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, // md5 checksum
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
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unsigned char img_eof[] = { 0xFF };
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void lprintf(int outputlevel, char *fmt, ...) {
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va_list argp;
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if (outputlevel <= verbosity) {
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va_start(argp, fmt);
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vprintf(fmt, argp);
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va_end(argp);
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}
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}
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int parse_par_file(FILE *f_par) {
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int exitcode = 0;
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char *buffer;
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size_t buffer_size;
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char *line;
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int lineno;
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int count;
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char string1[256];
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char string2[256];
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int value;
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mtd_info *mtd;
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FILE *f_in;
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int f_exitcode = 0;
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// read all lines
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buffer_size = 1000;
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buffer = NULL;
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lineno = 0;
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while (!feof(f_par)) {
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// read next line into memory
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do {
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// allocate memory for input line
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if (!buffer) {
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buffer = malloc(buffer_size);
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}
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if (!buffer) {
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exitcode = 1;
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printf("parse_par_file: can not allocate %i bytes\n", (int) buffer_size);
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break;
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}
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line = fgets(buffer, buffer_size, f_par);
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if (!line) {
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exitcode = ferror(f_par);
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if (exitcode) {
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printf("parse_par_file: %s\n", strerror(exitcode));
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}
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break;
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}
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// if buffer was not completely filled, then assume that line is complete
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count = strlen(buffer) + 1;
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if (count-- < buffer_size) {
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break;
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}
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// otherwise....
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// reset file position to line start
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value = fseek(f_par, -count, SEEK_CUR);
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if (value == -1) {
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exitcode = errno;
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printf("parse_par_file: %s\n", strerror(exitcode));
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break;
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}
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// double buffer size
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free(buffer);
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buffer = NULL;
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buffer_size *= 2;
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lprintf(DEBUG_LVL2, " extending buffer to %i bytes\n", buffer_size);
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} while (1);
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if ((!line) || (exitcode)) {
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break;
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}
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lineno++; // increase line number
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lprintf(DEBUG_LVL2, " line %i (%i) %s", lineno, count, line);
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value = 0;
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mtd = NULL;
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// split line if starting with a colon
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switch (line[0]) {
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case ':':
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count = sscanf(line, ":%255s %i %255s", string1, &value, string2);
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if (count != 3) {
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printf("line %i does not meet defined format (:<mtdname> <mtdsize> <file>)\n", lineno);
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} else {
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// populate mtd_info if supported mtd names
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if (!strcmp(string1, mtd_kernel.name)) {
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mtd = &mtd_kernel;
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} else if (!strcmp(string1, mtd_rootfs.name)) {
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mtd = &mtd_rootfs;
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} else if (!strcmp(string1, mtd_uboot.name)) {
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mtd = &mtd_uboot;
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} else if (!strcmp(string1, mtd_image.name)) {
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mtd = &mtd_image;
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}
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if (!mtd) {
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printf("unknown mtd %s in line %i\n", string1, lineno);
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} else if (mtd->filename) {
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f_exitcode = 1;
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printf("mtd %s in line %i multiple definitions\n", string1, lineno);
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} else {
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mtd->size = value;
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mtd->filename = strdup(string2);
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// Get file size
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f_in = fopen(mtd->filename, "rb");
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if (!f_in) {
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f_exitcode = errno;
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printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
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} else {
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value = fread(&mtd->magic, 1, 2, f_in);
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if (value < 2) {
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if (ferror(f_in)) {
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f_exitcode = ferror(f_in);
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printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
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} else {
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f_exitcode = 1;
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printf("input file %s: smaller than two bytes, no magic code\n", mtd->filename);
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}
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}
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value = fseek(f_in, 0, SEEK_END);
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if (value == -1) {
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f_exitcode = errno;
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printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
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} else {
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mtd->filesize = ftell(f_in);
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if (mtd->filesize == -1) {
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f_exitcode = errno;
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printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
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}
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}
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fclose(f_in);
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}
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lprintf(DEBUG, "mtd %s in line %i: size=0x%08X, filesize=0x%08lX, magic=0x%02X%02X, file=%s\n", mtd->name, lineno, mtd->size, mtd->filesize, mtd->magic[0], mtd->magic[1], mtd->filename);
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}
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}
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break;
|
|
case '#': // integer values
|
|
count = sscanf(line, "#%255s %i", string1, &value);
|
|
if (count != 2) {
|
|
printf("line %i does not meet defined format (#<variable name> <integer>\n", lineno);
|
|
} else {
|
|
if (!strcmp(string1, "version")) {
|
|
// changing version
|
|
fw_version[0] = 0x000000FF & ( value >> 8 );
|
|
fw_version[1] = 0x000000FF & value;
|
|
} else {
|
|
printf("unknown integer variable %s in line %i\n", string1, lineno);
|
|
}
|
|
|
|
lprintf(DEBUG, "integer variable %s in line %i: 0x%08X\n", string1, lineno, value);
|
|
}
|
|
break;
|
|
case '$': // strings
|
|
count = sscanf(line, "$%255s %255s", string1, string2);
|
|
if (count != 2) {
|
|
printf("line %i does not meet defined format (:<mtdname> <mtdsize> <file>)\n", lineno);
|
|
} else {
|
|
/*
|
|
if (!strcmp(string1, "something")) {
|
|
something = strdup(string2);
|
|
} else {
|
|
*/
|
|
printf("unknown string variable %s in line %i\n", string1, lineno);
|
|
// }
|
|
lprintf(DEBUG, "string variable %s in line %i: %s\n", string1, lineno, string2);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
free(buffer);
|
|
|
|
if (!exitcode) {
|
|
exitcode = f_exitcode;
|
|
}
|
|
|
|
return exitcode;
|
|
}
|
|
|
|
|
|
int create_bin_file(char *bin_filename) {
|
|
int exitcode = 0;
|
|
|
|
unsigned char *buffer;
|
|
|
|
int i;
|
|
mtd_info *mtd;
|
|
int addsize;
|
|
int padsize;
|
|
|
|
char *rand_filename = "/dev/urandom";
|
|
FILE *f_in;
|
|
int size;
|
|
|
|
unsigned long int csum;
|
|
unsigned char checksum;
|
|
|
|
FILE *f_out;
|
|
|
|
// allocate memory for bin file
|
|
buffer = malloc(KERNEL_CODE_OFFSET + FLASH_SIZE);
|
|
if (!buffer) {
|
|
exitcode = 1;
|
|
printf("create_bin_file: can not allocate %i bytes\n", FLASH_SIZE);
|
|
} else {
|
|
// initialize with zero
|
|
memset(buffer, 0, KERNEL_CODE_OFFSET + FLASH_SIZE);
|
|
}
|
|
|
|
// add files
|
|
if (!exitcode) {
|
|
for (i = 1; i <= 4; i++) {
|
|
addsize = 0;
|
|
padsize = 0;
|
|
|
|
switch (i) {
|
|
case 1:
|
|
mtd = &mtd_image;
|
|
padsize = ROOTFS_MIN_OFFSET - mtd->filesize;
|
|
break;
|
|
case 2:
|
|
mtd = &mtd_kernel;
|
|
break;
|
|
case 3:
|
|
mtd = &mtd_rootfs;
|
|
addsize = mtd->filesize;
|
|
padsize = ROOTFS_MIN_OFFSET - mtd_kernel.size - mtd->filesize;
|
|
break;
|
|
case 4:
|
|
mtd = &mtd_uboot;
|
|
addsize = mtd->filesize;
|
|
break;
|
|
default:
|
|
mtd = NULL;
|
|
exitcode = 1;
|
|
printf("create_bin_file: unknown mtd %i\n", i);
|
|
break;
|
|
}
|
|
if (!mtd) {
|
|
break;
|
|
}
|
|
if (!mtd->filename) {
|
|
continue;
|
|
}
|
|
|
|
lprintf(DEBUG, "adding mtd %s file %s\n", mtd->name, mtd->filename);
|
|
|
|
// adding file size
|
|
if (addsize) {
|
|
buffer[KERNEL_CODE_OFFSET + mtd->offset - 16] = 0x000000FFL & ( addsize >> 24 );
|
|
buffer[KERNEL_CODE_OFFSET + mtd->offset - 15] = 0x000000FFL & ( addsize >> 16 );
|
|
buffer[KERNEL_CODE_OFFSET + mtd->offset - 14] = 0x000000FFL & ( addsize >> 8 );
|
|
buffer[KERNEL_CODE_OFFSET + mtd->offset - 13] = 0x000000FFL & addsize;
|
|
}
|
|
|
|
// adding file content
|
|
f_in = fopen(mtd->filename, "rb");
|
|
if (!f_in) {
|
|
exitcode = errno;
|
|
printf("input file %s: %s\n", mtd->filename, strerror(exitcode));
|
|
} else {
|
|
size = fread(&buffer[KERNEL_CODE_OFFSET + mtd->offset], mtd->filesize, 1, f_in);
|
|
if (size < 1) {
|
|
if (ferror(f_in)) {
|
|
exitcode = ferror(f_in);
|
|
printf("input file %s: %s\n", mtd->filename, strerror(exitcode));
|
|
} else {
|
|
exitcode = 1;
|
|
printf("input file %s: smaller than before *doh*\n", mtd->filename);
|
|
}
|
|
}
|
|
fclose(f_in);
|
|
}
|
|
|
|
// padding
|
|
if (padsize > 0) {
|
|
addsize = padsize & 0x0000FFFF; // start on next 64KB border
|
|
padsize -= addsize;
|
|
}
|
|
if (padsize > 0) {
|
|
printf("mtd %s input file %s is too small (0x%08lX), adding 0x%08X random bytes\n", mtd->name, mtd->filename, mtd->filesize, padsize);
|
|
|
|
addsize += KERNEL_CODE_OFFSET + mtd->offset + mtd->filesize; // get offset
|
|
lprintf(DEBUG, " padding offset 0x%08X length 0x%08X\n", addsize, padsize);
|
|
|
|
f_in = fopen(rand_filename, "rb");
|
|
if (!f_in) {
|
|
exitcode = errno;
|
|
printf("input file %s: %s\n", rand_filename, strerror(exitcode));
|
|
} else {
|
|
size = fread(&buffer[addsize], padsize, 1, f_in);
|
|
if (size < 1) {
|
|
if (ferror(f_in)) {
|
|
exitcode = ferror(f_in);
|
|
printf("input file %s: %s\n", rand_filename, strerror(exitcode));
|
|
} else {
|
|
exitcode = 1;
|
|
printf("input file %s: smaller than before *doh*\n", rand_filename);
|
|
}
|
|
}
|
|
}
|
|
fclose(f_in);
|
|
}
|
|
}
|
|
}
|
|
|
|
// add special contents
|
|
if (!exitcode) {
|
|
lprintf(DEBUG, "adding rootfs special data\n");
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + PRODUCT_ID_OFFSET], product_id, 2);
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + PROTOCOL_ID_OFFSET], protocol_id, 2);
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + FW_VERSION_OFFSET], fw_version, 2);
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + FW_VERSION_OFFSET + 2], rootfs_unknown, 2);
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + SIGN_OFFSET], sign, 8); // eRcOmM
|
|
|
|
lprintf(DEBUG, "adding u-boot special data\n");
|
|
// memcpy(&buffer[KERNEL_CODE_OFFSET + SN_OFF], sn, 12); // ToDo: currently zero, find out what's this for?
|
|
// memcpy(&buffer[KERNEL_CODE_OFFSET + PIN_OFF], pin, 8); // ToDo: currently zero, find out what's this for?
|
|
// memcpy(&buffer[KERNEL_CODE_OFFSET + NODE_BASE_OFF], node, 25); // ToDo: currently zero, find out what's this for?
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + BOOT_ADDR_BASE_OFF + PID_OFFSET], pid, 70); // sErCoMm
|
|
memcpy(&buffer[KERNEL_CODE_OFFSET + BOOT_ADDR_BASE_OFF + PID_OFFSET + 57], fw_version, 2);
|
|
|
|
lprintf(DEBUG, "adding checksum byte\n");
|
|
csum = 0;
|
|
for (i = 0; i < KERNEL_CODE_OFFSET + FLASH_SIZE; i++) {
|
|
csum += buffer[i];
|
|
}
|
|
lprintf(DEBUG_LVL2, " checksum 0x%016lX (%li)\n", csum, csum);
|
|
|
|
buffer[KERNEL_CODE_OFFSET + NODE_BASE_OFF + 25] = ~csum + 1;
|
|
lprintf(DEBUG, " byte 0x%02X\n", buffer[KERNEL_CODE_OFFSET + NODE_BASE_OFF + 25]);
|
|
}
|
|
|
|
// write bin file
|
|
if (!exitcode) {
|
|
lprintf(DEBUG, "writing file %s\n", bin_filename);
|
|
f_out = fopen(bin_filename, "wb");
|
|
if (!f_out) {
|
|
exitcode = errno;
|
|
printf("output file %s: %s\n", bin_filename, strerror(exitcode));
|
|
} else {
|
|
size = fwrite(buffer, KERNEL_CODE_OFFSET + FLASH_SIZE, 1, f_out);
|
|
if (size < 1) {
|
|
if (ferror(f_out)) {
|
|
exitcode = ferror(f_out);
|
|
printf("output file %s: %s\n", bin_filename, strerror(exitcode));
|
|
} else {
|
|
exitcode = 1;
|
|
printf("output file %s: unspecified write error\n", bin_filename);
|
|
}
|
|
}
|
|
fclose(f_out);
|
|
}
|
|
}
|
|
|
|
return exitcode;
|
|
}
|
|
|
|
|
|
int create_zip_file(char *zip_filename, char *bin_filename) {
|
|
int exitcode = 0;
|
|
|
|
char *buffer;
|
|
size_t buffer_size;
|
|
int count;
|
|
|
|
buffer_size = 1000;
|
|
buffer = NULL;
|
|
do {
|
|
// allocate memory for command line
|
|
if (!buffer) {
|
|
buffer = malloc(buffer_size);
|
|
}
|
|
if (!buffer) {
|
|
exitcode = 1;
|
|
printf("create_zip_file: can not allocate %i bytes\n", (int) buffer_size);
|
|
break;
|
|
}
|
|
|
|
// if buffer was not completely filled, then line fit in completely
|
|
count = snprintf(buffer, buffer_size, "zip \"%s\" \"%s\"", zip_filename, bin_filename);
|
|
if ((count > -1) && (count < buffer_size)) {
|
|
break;
|
|
}
|
|
|
|
// otherwise try again with more space
|
|
if (count > -1) { // glibc 2.1
|
|
buffer_size = count + 1; // precisely what is needed
|
|
} else { // glibc 2.0
|
|
buffer_size *= 2; // twice the old size
|
|
}
|
|
free(buffer);
|
|
buffer = NULL;
|
|
lprintf(DEBUG_LVL2, " extending buffer to %i bytes\n", buffer_size);
|
|
} while (1);
|
|
|
|
if (!exitcode) {
|
|
// zipping binfile
|
|
lprintf(DEBUG, "%s\n", buffer);
|
|
count = system(buffer);
|
|
if ((count < 0) || (WEXITSTATUS(count))) {
|
|
exitcode = 1;
|
|
printf("create_zip_file: can not execute %s bytes\n", buffer);
|
|
}
|
|
}
|
|
|
|
return exitcode;
|
|
}
|
|
|
|
|
|
int create_img_file(FILE *f_out, char *out_filename, char *zip_filename) {
|
|
int exitcode = 0;
|
|
|
|
md5_state_t state;
|
|
md5_byte_t digest[16];
|
|
|
|
int i;
|
|
int size;
|
|
|
|
FILE *f_in;
|
|
unsigned char buffer[1];
|
|
|
|
// copy firmware version
|
|
memcpy(&img_hdr[50], fw_version, 2);
|
|
|
|
// clear md5 checksum
|
|
memset(&img_hdr[480], 0, 16);
|
|
|
|
// prepare md5 checksum calculation
|
|
md5_init(&state);
|
|
|
|
// add img header
|
|
lprintf(DEBUG_LVL2, " adding img header\n");
|
|
for (i = 0; i < 512; i++) {
|
|
size = fputc(img_hdr[i], f_out);
|
|
if (size == EOF) {
|
|
exitcode = ferror(f_out);
|
|
printf("output file %s: %s\n", out_filename, strerror(exitcode));
|
|
break;
|
|
}
|
|
md5_append(&state, (const md5_byte_t *)&img_hdr[i], 1);
|
|
}
|
|
|
|
// adding zip file
|
|
if (!exitcode) {
|
|
lprintf(DEBUG_LVL2, " adding zip file\n");
|
|
f_in = fopen(zip_filename, "rb");
|
|
if (!f_in) {
|
|
exitcode = errno;
|
|
printf("input file %s: %s\n", zip_filename, strerror(exitcode));
|
|
} else {
|
|
while ((size = fgetc(f_in)) != EOF) {
|
|
buffer[0] = size;
|
|
|
|
size = fputc(buffer[0], f_out);
|
|
if (size == EOF) {
|
|
exitcode = ferror(f_out);
|
|
printf("output file %s: %s\n", out_filename, strerror(exitcode));
|
|
break;
|
|
}
|
|
md5_append(&state, (const md5_byte_t *)buffer, 1);
|
|
}
|
|
if (ferror(f_in)) {
|
|
exitcode = ferror(f_in);
|
|
printf("input file %s: %s\n", zip_filename, strerror(exitcode));
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// add end byte
|
|
if (!exitcode) {
|
|
lprintf(DEBUG_LVL2, " adding img eof byte\n");
|
|
size = fputc(img_eof[0], f_out);
|
|
if (size == EOF) {
|
|
exitcode = ferror(f_out);
|
|
printf("output file %s: %s\n", out_filename, strerror(exitcode));
|
|
}
|
|
md5_append(&state, (const md5_byte_t *)img_eof, 1);
|
|
}
|
|
|
|
// append salt to md5 checksum
|
|
md5_append(&state, (const md5_byte_t *)"A^gU*<>?RFY@#DR&Z", 17);
|
|
|
|
// finish md5 checksum calculation
|
|
md5_finish(&state, digest);
|
|
|
|
// write md5 checksum into img header
|
|
if (!exitcode) {
|
|
lprintf(DEBUG_LVL2, " writing md5 checksum into img header of file\n");
|
|
|
|
size = fseek(f_out, 480, SEEK_SET);
|
|
if (size == -1) {
|
|
exitcode = errno;
|
|
printf("output file %s: %s\n", out_filename, strerror(exitcode));
|
|
} else {
|
|
size = fwrite(digest, 16, 1, f_out);
|
|
if (size < 1) {
|
|
if (ferror(f_out)) {
|
|
exitcode = ferror(f_out);
|
|
printf("output file %s: %s\n", out_filename, strerror(exitcode));
|
|
} else {
|
|
exitcode = 1;
|
|
printf("output file %s: unspecified write error\n", out_filename);
|
|
}
|
|
}
|
|
}
|
|
|
|
fclose(f_in);
|
|
}
|
|
|
|
return exitcode;
|
|
}
|
|
|
|
|
|
int main(int argc, char *argv[]) {
|
|
int exitcode = 0;
|
|
|
|
int help;
|
|
int onlybin;
|
|
int havezip;
|
|
int ignoremagic;
|
|
char option;
|
|
char *par_filename = NULL;
|
|
char *img_filename = NULL;
|
|
char *base_filename = NULL;
|
|
char *bin_filename = NULL;
|
|
char *zip_filename = NULL;
|
|
|
|
FILE *f_par = NULL;
|
|
FILE *f_img = NULL;
|
|
|
|
int i;
|
|
mtd_info *mtd;
|
|
int noupdate;
|
|
int sizecheck;
|
|
int magiccheck;
|
|
int magicerror;
|
|
|
|
|
|
// display program header
|
|
printf(program_info, VERSION);
|
|
|
|
|
|
// command line processing
|
|
// options
|
|
help = 0;
|
|
onlybin = 0;
|
|
havezip = 0;
|
|
ignoremagic = 0;
|
|
while ((option = getopt(argc, argv, "hbzif:v")) != -1) {
|
|
switch(option) {
|
|
case 'h':
|
|
help = 1;
|
|
break;
|
|
case 'b':
|
|
onlybin = 1;
|
|
break;
|
|
case 'z':
|
|
havezip = 1;
|
|
break;
|
|
case 'i':
|
|
ignoremagic = 1;
|
|
break;
|
|
case 'f':
|
|
sizecheck = sscanf(optarg, "%i", &i);
|
|
if (sizecheck != 1) {
|
|
printf("Firmware version of -f option not a valid integer\n");
|
|
exitcode = 1;
|
|
} else {
|
|
fw_version[0] = 0x000000FF & ( i >> 8 );
|
|
fw_version[1] = 0x000000FF & i;
|
|
}
|
|
break;
|
|
case 'v':
|
|
verbosity++;
|
|
break;
|
|
case ':': // option with missing operand
|
|
printf("Option -%c requires an operand\n", optopt);
|
|
exitcode = 1;
|
|
break;
|
|
case '?':
|
|
printf("Unrecognized option: -%c\n", optopt);
|
|
exitcode = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// files
|
|
for ( ; optind < argc; optind++) {
|
|
if (!par_filename) {
|
|
par_filename = argv[optind];
|
|
|
|
if (access(par_filename, R_OK)) {
|
|
if (havezip) {
|
|
printf("No read access to zip file %s\n", par_filename);
|
|
} else {
|
|
printf("No read access to parameter or zip file %s\n", par_filename);
|
|
}
|
|
exitcode = 1;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if ((!onlybin) && (!img_filename)) {
|
|
img_filename = argv[optind];
|
|
|
|
if (!access(img_filename, F_OK)) { // if file already exists then check write access
|
|
if (access(img_filename, W_OK)) {
|
|
printf("No write access to image file %s\n", img_filename);
|
|
exitcode = 1;
|
|
}
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
printf("Too many files stated\n");
|
|
exitcode = 1;
|
|
break;
|
|
}
|
|
|
|
// file name checks
|
|
if (!par_filename) {
|
|
if (havezip) {
|
|
printf("Zip file not stated\n");
|
|
} else {
|
|
printf("Parameter file not stated\n");
|
|
}
|
|
exitcode = 1;
|
|
} else {
|
|
base_filename = basename(par_filename);
|
|
if (!base_filename) {
|
|
if (havezip) {
|
|
printf("Zip file is a directory\n");
|
|
} else {
|
|
printf("Parameter file is a directory\n");
|
|
}
|
|
exitcode = 1;
|
|
}
|
|
}
|
|
|
|
if (!onlybin) {
|
|
if (!img_filename) {
|
|
printf("Image file not stated\n");
|
|
exitcode = 1;
|
|
} else {
|
|
base_filename = basename(img_filename);
|
|
if (!base_filename) {
|
|
printf("Image file is a directory\n");
|
|
exitcode = 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
// check for mutually exclusive options
|
|
if ((onlybin) && (havezip)) {
|
|
printf("Option -b and -z are mutually exclusive\n");
|
|
exitcode = 1;
|
|
}
|
|
|
|
// react on option problems or help request, then exit
|
|
if ((exitcode) || (help)) {
|
|
if (help) {
|
|
printf("This program creates Linksys style images for the WRT350Nv2 router.\n");
|
|
}
|
|
printf(" Usage:\n\
|
|
%s [-h] [-b] [-z] [-i] [-f <version>] [-v] <parameter or zip file> [<image file>]\n\n\
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Options:\n\
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-h - Show this help\n\
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-b - Create only bin file, no img or zip file is created\n\
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-z - Have zip file, the img file will be directly created from it\n\
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-i - Ignore unknown magic numbers\n\
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-f <version> - Wanted firmware version to use with -z\n\
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Default firmware version is 0x2020 = 2.00.20.\n\
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Note: version from parameter file will supersede this\n\
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-v - Increase debug verbosity level\n\n\
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Example:\n\
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%s wrt350nv2.par wrt350nv2.img\n\n", argv[0], argv[0]);
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return exitcode;
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}
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// handle special case when zipfile is stated
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if (havezip) {
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zip_filename = par_filename;
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par_filename = NULL;
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}
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lprintf(DEBUG_LVL2, " Verbosity: %i\n", verbosity);
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lprintf(DEBUG_LVL2, " Program: %s\n", argv[0]);
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if (par_filename) {
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lprintf(DEBUG, "Parameter file: %s\n", par_filename);
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}
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if (zip_filename) {
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lprintf(DEBUG, "Zip file: %s\n", zip_filename);
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}
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if (img_filename) {
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lprintf(DEBUG, "Image file: %s\n", img_filename);
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}
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// open files from command line
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// parameter/zip file
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if (par_filename) {
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f_par = fopen(par_filename, "rt");
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if (!f_par) {
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exitcode = errno;
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printf("Input file %s: %s\n", par_filename, strerror(exitcode));
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}
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}
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// image file
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if (img_filename) {
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f_img = fopen(img_filename, "wb");
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if (!f_img) {
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exitcode = errno;
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printf("Output file %s: %s\n", img_filename, strerror(exitcode));
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}
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}
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if (exitcode) {
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return exitcode;
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}
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// parameter file processing
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if ((!exitcode) && (f_par)) {
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lprintf(DEBUG, "parsing parameter file...\n");
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exitcode = parse_par_file(f_par);
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lprintf(DEBUG, "...done parsing file\n");
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}
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if (f_par) {
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fclose(f_par);
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}
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// check all input data
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if ((!exitcode) && (par_filename)) {
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lprintf(DEBUG, "checking mtd data...\n");
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for (i = 1; i <= 4; i++) {
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noupdate = 0;
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sizecheck = 0;
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magiccheck = 0;
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switch (i) {
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case 1:
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mtd = &mtd_image;
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sizecheck = ROOTFS_END_OFFSET;
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magiccheck = 1;
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break;
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case 2:
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mtd = &mtd_kernel;
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sizecheck = mtd_kernel.size - 16;
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magiccheck = 1;
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break;
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case 3:
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mtd = &mtd_rootfs;
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mtd->offset = mtd_kernel.size;
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mtd->size = ROOTFS_END_OFFSET - mtd_kernel.size;
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sizecheck = PRODUCT_ID_OFFSET - mtd_kernel.size;
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magiccheck = 1;
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break;
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case 4:
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mtd = &mtd_uboot;
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mtd->offset = BOOT_ADDR_BASE_OFF;
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noupdate = 1;
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sizecheck = SN_OFF - BOOT_ADDR_BASE_OFF;
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break;
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default:
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mtd = NULL;
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exitcode = 1;
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printf("unknown mtd check %i\n", i);
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break;
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}
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if (!mtd) {
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break;
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}
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lprintf(DEBUG_LVL2, " checking mtd %s\n", mtd->name);
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// general checks
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// no further checks if no file data present
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if (!mtd->filename) {
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continue;
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}
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// not updated by stock firmware
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if (noupdate) {
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printf("mtd %s is specified, but will not be updated as of Linksys firmware 2.0.19\n", mtd->name);
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}
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// general magic number check
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magicerror = 0;
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if (magiccheck) {
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switch (i) {
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case 1: // image
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case 2: // kernel
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if (!(
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((mtd->magic[0] == 0x27) && (mtd->magic[1] == 0x05)) // uImage
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)) {
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magicerror = 1;
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}
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break;
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case 3: // rootfs
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if (!(
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((mtd->magic[0] == 0x68) && (mtd->magic[1] == 0x73)) // squashfs
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|| ((mtd->magic[0] == 0x85) && (mtd->magic[1] == 0x19)) // jffs
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)) {
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magicerror = 1;
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}
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break;
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default:
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magicerror = 1;
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break;
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}
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if (magicerror) {
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printf("mtd %s input file %s has unknown magic number (0x%02X%02X)", mtd->name, mtd->filename, mtd->magic[0], mtd->magic[1]);
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if (ignoremagic) {
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printf("...ignoring");
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} else {
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exitcode = 1;
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}
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printf("\n");
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}
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}
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// mtd specific size check
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if (mtd == &mtd_image) {
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if (mtd->filesize < 0x00200000) {
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exitcode = 1;
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printf("mtd %s input file %s too unrealistic small (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
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}
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}
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if (mtd == &mtd_kernel) {
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if (mtd->filesize < 0x00080000) {
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exitcode = 1;
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printf("mtd %s input file %s too unrealistic small (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
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}
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}
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// general size check
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if (sizecheck) {
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if (sizecheck <= 0) {
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exitcode = 1;
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printf("mtd %s bad file size check (%i) due to input data\n", mtd->name, sizecheck);
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} else {
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if (mtd->filesize > sizecheck) {
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exitcode = 1;
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printf("mtd %s input file %s too big (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
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}
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}
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}
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}
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// Check for mandatory parts
|
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if ((!mtd_image.filename) && (!mtd_kernel.filename || !mtd_rootfs.filename)) {
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exitcode = 1;
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if (mtd_kernel.filename && !mtd_rootfs.filename) {
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printf("Kernel without rootfs, either incorrectly specified or not at all in parameter file\n");
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} else if (!mtd_kernel.filename && mtd_rootfs.filename) {
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printf("Rootfs without kernel, either incorrectly specified or not at all in parameter file\n");
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} else {
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printf("Neither an image nor kernel with rootfs was/were correctly specified or at all in parameter file\n");
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}
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}
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// Check for duplicate parts
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if ((mtd_image.filename) && (mtd_kernel.filename || mtd_rootfs.filename)) {
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exitcode = 1;
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printf("Image and kernel/rootfs specified in parameter file\n");
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}
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|
lprintf(DEBUG, "...done checking mtd data\n");
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}
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// bin creation in memory
|
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if ((!exitcode) && (par_filename)) {
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bin_filename = "wrt350n.bin";
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lprintf(DEBUG, "creating bin file %s...\n", bin_filename);
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exitcode = create_bin_file(bin_filename);
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lprintf(DEBUG, "...done creating bin file\n");
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}
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// zip file creation
|
|
if ((!exitcode) && (!onlybin) && (!zip_filename)) {
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|
zip_filename = "wrt350n.zip";
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lprintf(DEBUG, "creating zip file %s...\n", zip_filename);
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exitcode = create_zip_file(zip_filename, bin_filename);
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lprintf(DEBUG, "...done creating zip file\n");
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}
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// img file creation
|
|
if ((!exitcode) && (f_img)) {
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lprintf(DEBUG, "creating img file...\n");
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exitcode = create_img_file(f_img, img_filename, zip_filename);
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lprintf(DEBUG, "...done creating img file\n");
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}
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// clean up
|
|
if (f_img) {
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fclose(f_img);
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}
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// end program
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return exitcode;
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}
|