aboutsummaryrefslogtreecommitdiffstats
path: root/tools/wrt350nv2-builder/src/wrt350nv2-builder.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/wrt350nv2-builder/src/wrt350nv2-builder.c')
-rw-r--r--tools/wrt350nv2-builder/src/wrt350nv2-builder.c1126
1 files changed, 1126 insertions, 0 deletions
diff --git a/tools/wrt350nv2-builder/src/wrt350nv2-builder.c b/tools/wrt350nv2-builder/src/wrt350nv2-builder.c
new file mode 100644
index 000000000..3ebb40ed5
--- /dev/null
+++ b/tools/wrt350nv2-builder/src/wrt350nv2-builder.c
@@ -0,0 +1,1126 @@
+/*
+
+ WRT350Nv2-Builder 2.4 (previously called buildimg)
+ Copyright (C) 2008-2009 Dirk Teurlings <info@upexia.nl>
+ Copyright (C) 2009-2011 Matthias Buecher (http://www.maddes.net/)
+
+ 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
+
+ A lot of thanks to Kaloz and juhosg from OpenWRT and Lennert Buytenhek from
+ marvell for helping me figure this one out. This code is based on bash
+ scripts wrote by Peter van Valderen so the real credit should go to him.
+
+ This program reads the provided parameter file and creates an image which can
+ be used to flash a Linksys WRT350N v2 from stock firmware.
+ The trick is to fill unused space in the bin file with random, so that the
+ resulting zip file passes the size check of the stock firmware.
+
+ The parameter file layout for an original Linksys firmware:
+ :kernel 0x001A0000 /path/to/uImage
+ :rootfs 0 /path/to/root.squashfs
+ :u-boot 0 /path/to/u-boot.bin
+ #version 0x2020
+
+ Additionally since v2.4 an already complete image can be used:
+ :image 0 /path/to/openwrt-wrt350nv2-[squashfs|jffs2-64k].img
+
+ args:
+ 1 wrt350nv2.par parameter file describing the image layout
+ 2 wrt350nv2.img output file for linksys style image
+
+ A u-boot image inside the bin file is not necessary.
+ The version is not important.
+ The name of the bin file is not important, but still "wrt350n.bin" is used to
+ keep as close as possible to the stock firmware.
+
+ Linksys assumes that no mtd will be used to its maximum, so the last 16 bytes
+ of the mtd are abused to define the length of the next mtd content (4 bytes for
+ size + 12 pad bytes).
+
+ At the end of "rootfs" additional 16 bytes are abused for some data and a
+ highly important eRcOmM identifier, so the last 32 bytes of "rootfs" are abused.
+
+ At the end of "u-boot" 128 bytes are abused for some data, a checksum and a
+ highly important sErCoMm identifier.
+
+
+ This program uses a special GNU scanf modifier to allocate
+ sufficient memory for a strings with unknown length.
+ See http://www.kernel.org/doc/man-pages/online/pages/man3/scanf.3.html#NOTES
+
+
+ To extract everything from a Linksys style firmware image see
+ https://forum.openwrt.org/viewtopic.php?pid=92928#p92928
+
+ Changelog:
+ v2.4 - added ":image" definition for parameter file, this allows
+ to use a complete sysupgrade image without any kernel size check
+ v2.3 - allow jffs by adding its magic number (0x8519)
+ added parameter option -i to ignore unknown magic numbers
+ v2.2 - fixed checksum byte calculation for other versions than 0x2019
+ fixed rare problem with padsize
+ updated info to stock firmware 2.00.20
+ fixed typos
+ v2.1 - used "wrt350n.bin" for the created image (closer to stock)
+ added option to create the image in two separate steps (-b / -z)
+ v2.0 - complete re-write
+
+*/
+
+// includes
+#define _GNU_SOURCE // for GNU's basename()
+#include <assert.h>
+#include <errno.h> // errno
+#include <stdarg.h>
+#include <stdio.h> // fopen(), fread(), fclose(), etc.
+#include <stdlib.h> // system(), etc.
+#include <string.h> // basename(), strerror(), strdup(), etc.
+#include <unistd.h> // optopt(), access(), etc.
+#include <libgen.h>
+#include <sys/wait.h> // WEXITSTATUS, etc.
+
+// custom includes
+#include "md5.h" // MD5 routines
+#include "upgrade.h" // Linksys definitions from firmware 2.0.19 (unchanged up to 2.0.20)
+
+
+// version info
+#define VERSION "2.4"
+char program_info[] = "WRT350Nv2-Builder v%s by Dirk Teurlings <info@upexia.nl> and Matthias Buecher (http://www.maddes.net/)\n";
+
+// verbosity
+#define DEBUG 1
+#define DEBUG_LVL2 2
+int verbosity = 0;
+
+// mtd info
+typedef struct {
+ char *name;
+ int offset;
+ int size;
+ char *filename;
+ long int filesize;
+ unsigned char magic[2];
+} mtd_info;
+
+mtd_info mtd_kernel = { "kernel", 0, 0, NULL, 0L, { 0, 0 } };
+mtd_info mtd_rootfs = { "rootfs", 0, 0, NULL, 0L, { 0, 0 } };
+mtd_info mtd_image = { "image", 0, 0, NULL, 0L, { 0, 0 } };
+mtd_info mtd_uboot = { "u-boot", 0, 0, NULL, 0L, { 0, 0 } };
+
+#define ROOTFS_END_OFFSET 0x00760000
+#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
+ // 2.0.17: filled up to 0x00640000
+ // 2.0.19: filled up to 0x00670000
+ // 2.0.20: filled up to 0x00670000
+
+// rootfs statics via: hexdump -v -e '1/1 "0x%02X, "' -s 0x0075FFE0 -n 16 "wrt350n.bin" ; echo -en "\n"
+unsigned char product_id[] = { 0x00, 0x03 }; // seems to be a fixed value
+unsigned char protocol_id[] = { 0x00, 0x00 }; // seems to be a fixed value
+unsigned char fw_version[] = { 0x20, 0x20 };
+unsigned char rootfs_unknown[] = { 0x90, 0xF7 }; // seems to be a fixed value
+unsigned char sign[] = { 0x65, 0x52, 0x63, 0x4F, 0x6D, 0x4D, 0x00, 0x00 }; // eRcOmM
+
+// u-boot statics via: hexdump -v -e '1/1 "0x%02X, "' -s 0x007FFF80 -n 128 "wrt350n.bin" ; echo -en "\n"
+//unsigned char sn[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // (12) seems to be an unused value
+//unsigned char pin[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }; // (8) seems to be an unused value
+//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
+// 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+//unsigned char checksum[] = { 0xE9 }; // (1) is calculated, does it belong to node?
+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
+ 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, // protocol id?
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, // protocol id?
+ 0x12, 0x34, // firmware version, same as in rootfs
+ 0x00, 0x00, 0x00, 0x04,
+ 0x73, 0x45, 0x72, 0x43, 0x6F, 0x4D, 0x6D }; // sErCoMm
+
+// 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)
+unsigned char img_hdr[] = { 0x00, 0x01, 0x00, 0x00, 0x59, 0x42, 0x50, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03,
+ 0x00, 0x00,
+ 0x12, 0x34, // firmware version, same as in rootfs
+ 0x00, 0x00, 0x00, 0x04, 0x61, 0x44, 0x6D, 0x42, 0x6C, 0x4B, 0x3D, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC, 0xDE, 0xF0, // md5 checksum
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+unsigned char img_eof[] = { 0xFF };
+
+
+void lprintf(int outputlevel, char *fmt, ...) {
+ va_list argp;
+ if (outputlevel <= verbosity) {
+ va_start(argp, fmt);
+ vprintf(fmt, argp);
+ va_end(argp);
+ }
+}
+
+
+int parse_par_file(FILE *f_par) {
+ int exitcode = 0;
+
+ char *buffer;
+ size_t buffer_size;
+ char *line;
+
+ int lineno;
+ int count;
+
+ char string1[256];
+ char string2[256];
+ int value;
+
+ mtd_info *mtd;
+ FILE *f_in;
+ int f_exitcode = 0;
+
+ // read all lines
+ buffer_size = 1000;
+ buffer = NULL;
+ lineno = 0;
+ while (!feof(f_par)) {
+ // read next line into memory
+ do {
+ // allocate memory for input line
+ if (!buffer) {
+ buffer = malloc(buffer_size);
+ }
+ if (!buffer) {
+ exitcode = 1;
+ printf("parse_par_file: can not allocate %i bytes\n", (int) buffer_size);
+ break;
+ }
+
+ line = fgets(buffer, buffer_size, f_par);
+ if (!line) {
+ exitcode = ferror(f_par);
+ if (exitcode) {
+ printf("parse_par_file: %s\n", strerror(exitcode));
+ }
+ break;
+ }
+
+ // if buffer was not completely filled, then assume that line is complete
+ count = strlen(buffer) + 1;
+ if (count-- < buffer_size) {
+ break;
+ }
+
+ // otherwise....
+
+ // reset file position to line start
+ value = fseek(f_par, -count, SEEK_CUR);
+ if (value == -1) {
+ exitcode = errno;
+ printf("parse_par_file: %s\n", strerror(exitcode));
+ break;
+ }
+
+ // double buffer size
+ free(buffer);
+ buffer = NULL;
+ buffer_size *= 2;
+ lprintf(DEBUG_LVL2, " extending buffer to %i bytes\n", buffer_size);
+ } while (1);
+ if ((!line) || (exitcode)) {
+ break;
+ }
+
+ lineno++; // increase line number
+
+ lprintf(DEBUG_LVL2, " line %i (%i) %s", lineno, count, line);
+
+ value = 0;
+ mtd = NULL;
+
+ // split line if starting with a colon
+ switch (line[0]) {
+ case ':':
+ count = sscanf(line, ":%255s %i %255s", string1, &value, string2);
+ if (count != 3) {
+ printf("line %i does not meet defined format (:<mtdname> <mtdsize> <file>)\n", lineno);
+ } else {
+ // populate mtd_info if supported mtd names
+ if (!strcmp(string1, mtd_kernel.name)) {
+ mtd = &mtd_kernel;
+ } else if (!strcmp(string1, mtd_rootfs.name)) {
+ mtd = &mtd_rootfs;
+ } else if (!strcmp(string1, mtd_uboot.name)) {
+ mtd = &mtd_uboot;
+ } else if (!strcmp(string1, mtd_image.name)) {
+ mtd = &mtd_image;
+ }
+
+ if (!mtd) {
+ printf("unknown mtd %s in line %i\n", string1, lineno);
+ } else if (mtd->filename) {
+ f_exitcode = 1;
+ printf("mtd %s in line %i multiple definitions\n", string1, lineno);
+ } else {
+ mtd->size = value;
+ mtd->filename = strdup(string2);
+
+ // Get file size
+ f_in = fopen(mtd->filename, "rb");
+ if (!f_in) {
+ f_exitcode = errno;
+ printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
+ } else {
+ value = fread(&mtd->magic, 1, 2, f_in);
+ if (value < 2) {
+ if (ferror(f_in)) {
+ f_exitcode = ferror(f_in);
+ printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
+ } else {
+ f_exitcode = 1;
+ printf("input file %s: smaller than two bytes, no magic code\n", mtd->filename);
+ }
+ }
+
+ value = fseek(f_in, 0, SEEK_END);
+ if (value == -1) {
+ f_exitcode = errno;
+ printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
+ } else {
+ mtd->filesize = ftell(f_in);
+ if (mtd->filesize == -1) {
+ f_exitcode = errno;
+ printf("input file %s: %s\n", mtd->filename, strerror(f_exitcode));
+ }
+ }
+
+ fclose(f_in);
+ }
+
+ 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);
+ }
+ }
+ 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\
+ Options:\n\
+ -h - Show this help\n\
+ -b - Create only bin file, no img or zip file is created\n\
+ -z - Have zip file, the img file will be directly created from it\n\
+ -i - Ignore unknown magic numbers\n\
+ -f <version> - Wanted firmware version to use with -z\n\
+ Default firmware version is 0x2020 = 2.00.20.\n\
+ Note: version from parameter file will supersede this\n\
+ -v - Increase debug verbosity level\n\n\
+ Example:\n\
+ %s wrt350nv2.par wrt350nv2.img\n\n", argv[0], argv[0]);
+ return exitcode;
+ }
+
+ // handle special case when zipfile is stated
+ if (havezip) {
+ zip_filename = par_filename;
+ par_filename = NULL;
+ }
+
+ lprintf(DEBUG_LVL2, " Verbosity: %i\n", verbosity);
+ lprintf(DEBUG_LVL2, " Program: %s\n", argv[0]);
+
+ if (par_filename) {
+ lprintf(DEBUG, "Parameter file: %s\n", par_filename);
+ }
+ if (zip_filename) {
+ lprintf(DEBUG, "Zip file: %s\n", zip_filename);
+ }
+ if (img_filename) {
+ lprintf(DEBUG, "Image file: %s\n", img_filename);
+ }
+
+
+// open files from command line
+ // parameter/zip file
+ if (par_filename) {
+ f_par = fopen(par_filename, "rt");
+ if (!f_par) {
+ exitcode = errno;
+ printf("Input file %s: %s\n", par_filename, strerror(exitcode));
+ }
+ }
+
+ // image file
+ if (img_filename) {
+ f_img = fopen(img_filename, "wb");
+ if (!f_img) {
+ exitcode = errno;
+ printf("Output file %s: %s\n", img_filename, strerror(exitcode));
+ }
+ }
+
+ if (exitcode) {
+ return exitcode;
+ }
+
+
+// parameter file processing
+ if ((!exitcode) && (f_par)) {
+ lprintf(DEBUG, "parsing parameter file...\n");
+
+ exitcode = parse_par_file(f_par);
+
+ lprintf(DEBUG, "...done parsing file\n");
+ }
+ if (f_par) {
+ fclose(f_par);
+ }
+
+
+// check all input data
+ if ((!exitcode) && (par_filename)) {
+ lprintf(DEBUG, "checking mtd data...\n");
+
+ for (i = 1; i <= 4; i++) {
+ noupdate = 0;
+ sizecheck = 0;
+ magiccheck = 0;
+
+ switch (i) {
+ case 1:
+ mtd = &mtd_image;
+ sizecheck = ROOTFS_END_OFFSET;
+ magiccheck = 1;
+ break;
+ case 2:
+ mtd = &mtd_kernel;
+ sizecheck = mtd_kernel.size - 16;
+ magiccheck = 1;
+ break;
+ case 3:
+ mtd = &mtd_rootfs;
+ mtd->offset = mtd_kernel.size;
+ mtd->size = ROOTFS_END_OFFSET - mtd_kernel.size;
+ sizecheck = PRODUCT_ID_OFFSET - mtd_kernel.size;
+ magiccheck = 1;
+ break;
+ case 4:
+ mtd = &mtd_uboot;
+ mtd->offset = BOOT_ADDR_BASE_OFF;
+ noupdate = 1;
+ sizecheck = SN_OFF - BOOT_ADDR_BASE_OFF;
+ break;
+ default:
+ mtd = NULL;
+ exitcode = 1;
+ printf("unknown mtd check %i\n", i);
+ break;
+ }
+ if (!mtd) {
+ break;
+ }
+
+ lprintf(DEBUG_LVL2, " checking mtd %s\n", mtd->name);
+
+ // general checks
+
+ // no further checks if no file data present
+ if (!mtd->filename) {
+ continue;
+ }
+
+ // not updated by stock firmware
+ if (noupdate) {
+ printf("mtd %s is specified, but will not be updated as of Linksys firmware 2.0.19\n", mtd->name);
+ }
+
+ // general magic number check
+ magicerror = 0;
+ if (magiccheck) {
+ switch (i) {
+ case 1: // image
+ case 2: // kernel
+ if (!(
+ ((mtd->magic[0] == 0x27) && (mtd->magic[1] == 0x05)) // uImage
+ )) {
+ magicerror = 1;
+ }
+ break;
+ case 3: // rootfs
+ if (!(
+ ((mtd->magic[0] == 0x68) && (mtd->magic[1] == 0x73)) // squashfs
+ || ((mtd->magic[0] == 0x85) && (mtd->magic[1] == 0x19)) // jffs
+ )) {
+ magicerror = 1;
+ }
+ break;
+ default:
+ magicerror = 1;
+ break;
+ }
+ if (magicerror) {
+ printf("mtd %s input file %s has unknown magic number (0x%02X%02X)", mtd->name, mtd->filename, mtd->magic[0], mtd->magic[1]);
+ if (ignoremagic) {
+ printf("...ignoring");
+ } else {
+ exitcode = 1;
+ }
+ printf("\n");
+ }
+ }
+
+ // mtd specific size check
+ if (mtd == &mtd_image) {
+ if (mtd->filesize < 0x00200000) {
+ exitcode = 1;
+ printf("mtd %s input file %s too unrealistic small (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
+ }
+ }
+
+ if (mtd == &mtd_kernel) {
+ if (mtd->filesize < 0x00080000) {
+ exitcode = 1;
+ printf("mtd %s input file %s too unrealistic small (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
+ }
+ }
+
+ // general size check
+ if (sizecheck) {
+ if (sizecheck <= 0) {
+ exitcode = 1;
+ printf("mtd %s bad file size check (%i) due to input data\n", mtd->name, sizecheck);
+ } else {
+ if (mtd->filesize > sizecheck) {
+ exitcode = 1;
+ printf("mtd %s input file %s too big (0x%08lX)\n", mtd->name, mtd->filename, mtd->filesize);
+ }
+ }
+ }
+ }
+
+ // Check for mandatory parts
+ if ((!mtd_image.filename) && (!mtd_kernel.filename || !mtd_rootfs.filename)) {
+ exitcode = 1;
+ if (mtd_kernel.filename && !mtd_rootfs.filename) {
+ printf("Kernel without rootfs, either incorrectly specified or not at all in parameter file\n");
+ } else if (!mtd_kernel.filename && mtd_rootfs.filename) {
+ printf("Rootfs without kernel, either incorrectly specified or not at all in parameter file\n");
+ } else {
+ printf("Neither an image nor kernel with rootfs was/were correctly specified or at all in parameter file\n");
+ }
+ }
+
+ // Check for duplicate parts
+ if ((mtd_image.filename) && (mtd_kernel.filename || mtd_rootfs.filename)) {
+ exitcode = 1;
+ printf("Image and kernel/rootfs specified in parameter file\n");
+ }
+
+ lprintf(DEBUG, "...done checking mtd data\n");
+ }
+
+
+// bin creation in memory
+ if ((!exitcode) && (par_filename)) {
+ bin_filename = "wrt350n.bin";
+
+ lprintf(DEBUG, "creating bin file %s...\n", bin_filename);
+
+ exitcode = create_bin_file(bin_filename);
+
+ lprintf(DEBUG, "...done creating bin file\n");
+ }
+
+// zip file creation
+ if ((!exitcode) && (!onlybin) && (!zip_filename)) {
+ zip_filename = "wrt350n.zip";
+
+ lprintf(DEBUG, "creating zip file %s...\n", zip_filename);
+
+ exitcode = create_zip_file(zip_filename, bin_filename);
+
+ lprintf(DEBUG, "...done creating zip file\n");
+ }
+
+
+// img file creation
+ if ((!exitcode) && (f_img)) {
+ lprintf(DEBUG, "creating img file...\n");
+
+ exitcode = create_img_file(f_img, img_filename, zip_filename);
+
+ lprintf(DEBUG, "...done creating img file\n");
+ }
+
+// clean up
+ if (f_img) {
+ fclose(f_img);
+ }
+
+// end program
+ return exitcode;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-06 09:01:22 +0000