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openwrt-xburst/openwrt/target/linux/package/bcm43xx-standalone/fwcutter/fwcutter.c
wbx c7552634b1 update to a newer snapshot and m. buesch snapshots 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@3358 3c298f89-4303-0410-b956-a3cf2f4a3e73
2006-03-13 11:27:06 +00:00

563 lines
14 KiB
C
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/*
* firmware cutter for broadcom 43xx wireless driver files
*
* Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
* 2005 Michael Buesch <mbuesch@freenet.de>
* 2005 Alex Beregszaszi
*
* 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; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <stdio.h>
typedef unsigned char byte;
#define DRIVER_UNSUPPORTED 0x01 /* no support for this driver file */
#define BYTE_ORDER_BIG_ENDIAN 0x02 /* ppc driver files */
#define BYTE_ORDER_LITTLE_ENDIAN 0x04 /* x86, mips driver files */
#define MISSING_INITVAL_08 0x10 /* initval 8 is missing */
#define MISSING_INITVAL_80211_A 0x20 /* initvals 3,7,9,10 (802.11a cards) are empty */
#define FIRMWARE_UCODE_OFFSET 100
#define FIRMWARE_UNDEFINED 0
#define FIRMWARE_PCM_4 4
#define FIRMWARE_PCM_5 5
#define FIRMWARE_UCODE_2 (FIRMWARE_UCODE_OFFSET + 2)
#define FIRMWARE_UCODE_4 (FIRMWARE_UCODE_OFFSET + 4)
#define FIRMWARE_UCODE_5 (FIRMWARE_UCODE_OFFSET + 5)
#define FIRMWARE_UCODE_11 (FIRMWARE_UCODE_OFFSET + 11)
#define fwcutter_stringify_1(x) #x
#define fwcutter_stringify(x) fwcutter_stringify_1(x)
#define FWCUTTER_VERSION fwcutter_stringify(FWCUTTER_VERSION_)
#include "md5.h"
#include "fwcutter_list.h"
struct cmdline_args {
const char *infile;
const char *postfix;
const char *target_dir;
int identify_only;
};
static struct cmdline_args cmdargs;
int big_endian_cpu;
static void write_little_endian(FILE *f, byte *buffer, int len)
{
byte swapbuf[4];
while (len > 0) {
swapbuf[0] = buffer[3]; swapbuf[1] = buffer[2];
swapbuf[2] = buffer[1]; swapbuf[3] = buffer[0];
fwrite(swapbuf, 4, 1, f);
buffer = buffer + 4;
len = len - 4;
}
}
static void write_big_endian(FILE *f, byte *buffer, int len)
{
while (len > 0) {
fwrite(buffer, 4, 1, f);
buffer = buffer + 4;
len = len - 4;
}
}
static void write_fw(const char *outfilename, uint8_t flags, byte *data, int len)
{
FILE* fw;
char outfile[2048];
snprintf(outfile, sizeof(outfile),
"%s/%s", cmdargs.target_dir, outfilename);
fw = fopen(outfile, "w");
if (!fw) {
perror(outfile);
exit(1);
}
if (flags & BYTE_ORDER_LITTLE_ENDIAN)
write_little_endian(fw, data, len);
else if (flags & BYTE_ORDER_BIG_ENDIAN)
write_big_endian(fw, data, len);
else
printf("unknown byteorder...\n");
fflush(fw);
fclose(fw);
}
static void write_iv(uint8_t flags, byte *data)
{
FILE* fw;
char ivfilename[2048];
int i;
for (i = 1; i <= 10; i++) {
if ((flags & MISSING_INITVAL_08) && (i==8)) {
printf("*****: Sorry, initval08 is not available in driver file \"%s\".\n", cmdargs.infile);
printf("*****: Extracting firmware from an old driver is bad. Choose a more recent one.\n");
printf("*****: Luckily bcm43xx driver doesn't include initval08 uploads at the moment.\n");
printf("*****: But this can be added in the future...\n");
i++;
}
snprintf(ivfilename, sizeof(ivfilename),
"%s/bcm43xx_initval%02d%s.fw",
cmdargs.target_dir, i, cmdargs.postfix);
fw = fopen(ivfilename, "w");
if (!fw) {
perror(ivfilename);
exit(1);
}
printf("extracting bcm43xx_initval%02d%s.fw ...\n", i, cmdargs.postfix);
while (1) {
if ((data[0]==0xff) && (data[1]==0xff) && (data[2]==0x00) && (data[3]==0x00)) {
data = data + 8;
break;
}
if (flags & BYTE_ORDER_LITTLE_ENDIAN)
fprintf(fw, "%c%c%c%c%c%c%c%c",
data[1], data[0], /* offset */
data[3], data[2], /* size */
data[7], data[6], data[5], data[4]); /* value */
else if (flags & BYTE_ORDER_BIG_ENDIAN)
fprintf(fw, "%c%c%c%c%c%c%c%c",
data[0], data[1], /* offset */
data[2], data[3], /* size */
data[4], data[5], data[6], data[7]); /* value */
else {
printf("unknown byteorder...\n");
exit(1);
}
data = data + 8;
}
fflush(fw);
fclose(fw);
}
}
static byte* read_file(const char* filename)
{
FILE* file;
long len;
byte* data;
file = fopen(filename, "rb");
if (!file) {
perror(filename);
exit(1);
}
if (fseek(file, 0, SEEK_END)) {
perror("cannot seek");
exit(1);
}
len = ftell(file);
fseek(file, 0, SEEK_SET);
data = malloc(len);
if (!data) {
fputs("out of memory\n", stderr);
exit(1);
}
if (fread(data, 1, len, file) != len) {
perror("cannot read");
exit(1);
}
fclose(file);
return data;
}
static void extract_fw(uint8_t fwtype, uint8_t flags, uint32_t pos, uint32_t length)
{
byte* filedata;
char outfile[1024];
switch (fwtype) {
case FIRMWARE_UCODE_2:
case FIRMWARE_UCODE_4:
case FIRMWARE_UCODE_5:
case FIRMWARE_UCODE_11:
snprintf(outfile, sizeof(outfile), "bcm43xx_microcode%i%s.fw",
fwtype - FIRMWARE_UCODE_OFFSET, cmdargs.postfix);
break;
case FIRMWARE_PCM_4:
case FIRMWARE_PCM_5:
snprintf(outfile, sizeof(outfile), "bcm43xx_pcm%i%s.fw",
fwtype, cmdargs.postfix);
break;
default:
snprintf(outfile, sizeof(outfile), "bcm43xx_unknown.fw");
}
if (length > 0) {
printf("extracting %s ...\n", outfile);
filedata = read_file(cmdargs.infile);
write_fw(outfile, flags, filedata + pos, length);
free(filedata);
} else {
printf("*****: Sorry, it's not posible to extract \"%s\".\n", outfile);
printf("*****: Extracting firmware from an old driver is bad. Choose a more recent one.\n");
switch (fwtype) {
case FIRMWARE_UCODE_2:
printf("*****: bcm43xx driver will not work with with core revision 2.\n");
break;
case FIRMWARE_UCODE_4:
printf("*****: bcm43xx driver will not work with with core revision 4.\n");
break;
case FIRMWARE_UCODE_5:
printf("*****: bcm43xx driver will not work with with core revision 5 or higher.\n");
break;
case FIRMWARE_UCODE_11:
printf("*****: Luckily bcm43xx driver doesn't include microcode11 uploads at the moment.\n");
printf("*****: But this can be added in the future...\n");
break;
case FIRMWARE_PCM_4:
printf("*****: bcm43xx driver will not work with with core revision 4 or smaller.\n");
break;
case FIRMWARE_PCM_5:
printf("*****: bcm43xx driver will not work with with core revision 5 or higher.\n");
break;
}
}
}
static void extract_iv(uint8_t flags, uint32_t pos)
{
byte* filedata;
if (pos > 0) {
filedata = read_file(cmdargs.infile);
write_iv(flags, filedata + pos);
free(filedata);
}
}
static void print_banner(void)
{
printf("fwcutter " FWCUTTER_VERSION "\n");
}
static void print_file(const struct file *file)
{
printf("%s\t", file->name);
if (strlen(file->name) < 8)
printf("\t");
printf("%s\t", file->version);
if (strlen(file->version) < 8)
printf("\t");
if (strlen(file->version) < 16)
printf("\t");
if (!(file->flags & DRIVER_UNSUPPORTED)) {
if (file->flags & MISSING_INITVAL_80211_A)
printf("b/g ");
else
printf("a/b/g");
}
printf(" %s", file->md5);
printf("\n");
}
static void print_supported_files(void)
{
int i;
print_banner();
printf("\nExtracting firmware is possible from these binary driver files:\n\n");
printf("<filename>\t<version>\t <802.11><MD5 checksum>\n\n");
for (i = 0; i < FILES; i++) {
if (files[i].flags & DRIVER_UNSUPPORTED)
continue;
print_file(&files[i]);
}
printf("\n\nExtracting firmware is IMPOSSIBLE from these binary driver files:\n\n");
printf("<filename>\t<version>\t <MD5 checksum>\n\n");
for (i = 0; i < FILES; i++) {
if (!(files[i].flags & DRIVER_UNSUPPORTED))
continue;
print_file(&files[i]);
}
}
static const struct file * find_file(FILE *fd)
{
unsigned char buffer[16384], signature[16];
struct MD5Context md5c;
char md5sig[33];
int i;
MD5Init(&md5c);
while ((i = (int) fread(buffer, 1, sizeof(buffer), fd)) > 0)
MD5Update(&md5c, buffer, (unsigned) i);
MD5Final(signature, &md5c);
snprintf(md5sig, sizeof(md5sig),
"%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x%.2x",
signature[0], signature[1], signature[2], signature[3],
signature[4], signature[5], signature[6], signature[7],
signature[8], signature[9], signature[10], signature[11],
signature[12], signature[13], signature[14], signature[15]);
for (i = 0; i < FILES; ++i) {
if (strcasecmp(md5sig, files[i].md5) == 0) {
if (files[i].flags & DRIVER_UNSUPPORTED) {
printf("Extracting firmware from this file is IMPOSSIBLE. (too old)\n");
return 0;
}
printf("fwcutter can cut the firmware out of %s\n", cmdargs.infile);
printf(" filename : %s\n", files[i].name);
printf(" version : %s\n", files[i].version);
printf(" MD5 : %s\n\n", files[i].md5);
if (files[i].flags & MISSING_INITVAL_80211_A) {
printf("WARNING! This firmware doesn't include support for 802.11a cards.\n");
printf("WARNING! Use this firmware only for 802.11b/g cards.\n\n");
}
return &(files[i]);
}
}
printf("Sorry, the input file is either wrong or not supported by fwcutter.\n");
printf("I can't find the MD5sum %s :(\n", md5sig);
return 0;
}
static void get_endianess(void)
{
const unsigned char x[] = { 0xde, 0xad, 0xbe, 0xef, };
const uint32_t *p = (uint32_t *)x;
if (*p == 0xdeadbeef) {
big_endian_cpu = 1;
} else if (*p == 0xefbeadde) {
big_endian_cpu = 0;
} else {
printf("Confused: NUXI endian machine??\n");
exit(-1);
}
}
static void print_usage(int argc, char *argv[])
{
print_banner();
printf("\nUsage: %s [OPTION] [driver.sys]\n", argv[0]);
printf(" -l|--list List supported driver versions\n");
printf(" -i|--identify Only identify the driver file (don't extract)\n");
printf(" -w|--target-dir DIR Extract and write firmware to DIR\n");
printf(" -p|--postfix \".FOO\" Postfix for firmware filenames (.FOO.fw)\n");
printf(" -v|--version Print fwcutter version\n");
printf(" -h|--help Print this help\n");
printf("\nExample: %s bcmwl5.sys\n"
" to extract the firmware blobs from bcmwl5.sys\n", argv[0]);
}
#define ARG_MATCH 0
#define ARG_NOMATCH 1
#define ARG_ERROR -1
static int do_cmp_arg(char **argv, int *pos,
const char *template,
int allow_merged,
char **param)
{
char *arg;
char *next_arg;
size_t arg_len, template_len;
arg = argv[*pos];
next_arg = argv[*pos + 1];
arg_len = strlen(arg);
template_len = strlen(template);
if (param) {
/* Maybe we have a merged parameter here.
* A merged parameter is "-pfoobar" for example.
*/
if (allow_merged && arg_len > template_len) {
if (memcmp(arg, template, template_len) == 0) {
*param = arg + template_len;
return ARG_MATCH;
}
return ARG_NOMATCH;
} else if (arg_len != template_len)
return ARG_NOMATCH;
*param = next_arg;
}
if (strcmp(arg, template) == 0) {
if (param) {
/* Skip the parameter on the next iteration. */
(*pos)++;
if (*param == 0) {
printf("%s needs a parameter\n", arg);
return ARG_ERROR;
}
}
return ARG_MATCH;
}
return ARG_NOMATCH;
}
/* Simple and lean command line argument parsing. */
static int cmp_arg(char **argv, int *pos,
const char *long_template,
const char *short_template,
char **param)
{
int err;
if (long_template) {
err = do_cmp_arg(argv, pos, long_template, 0, param);
if (err == ARG_MATCH || err == ARG_ERROR)
return err;
}
err = ARG_NOMATCH;
if (short_template)
err = do_cmp_arg(argv, pos, short_template, 1, param);
return err;
}
static int parse_args(int argc, char *argv[])
{
int i, res;
char *param;
if (argc < 2)
goto out_usage;
for (i = 1; i < argc; i++) {
res = cmp_arg(argv, &i, "--list", "-l", 0);
if (res == ARG_MATCH) {
print_supported_files();
return 1;
} else if (res == ARG_ERROR)
goto out;
res = cmp_arg(argv, &i, "--version", "-v", 0);
if (res == ARG_MATCH) {
print_banner();
return 1;
} else if (res == ARG_ERROR)
goto out;
res = cmp_arg(argv, &i, "--help", "-h", 0);
if (res == ARG_MATCH)
goto out_usage;
else if (res == ARG_ERROR)
goto out;
res = cmp_arg(argv, &i, "--identify", "-i", 0);
if (res == ARG_MATCH) {
cmdargs.identify_only = 1;
continue;
} else if (res == ARG_ERROR)
goto out;
res = cmp_arg(argv, &i, "--target-dir", "-w", &param);
if (res == ARG_MATCH) {
cmdargs.target_dir = param;
continue;
} else if (res == ARG_ERROR)
goto out;
res = cmp_arg(argv, &i, "--postfix", "-p", &param);
if (res == ARG_MATCH) {
cmdargs.postfix = param;
continue;
} else if (res == ARG_ERROR)
goto out;
cmdargs.infile = argv[i];
break;
}
if (!cmdargs.infile)
goto out_usage;
return 0;
out_usage:
print_usage(argc, argv);
out:
return -1;
}
int main(int argc, char *argv[])
{
FILE *fd;
const struct file *file;
int err;
get_endianess();
cmdargs.target_dir = ".";
cmdargs.postfix = "";
err = parse_args(argc, argv);
if (err == 1)
return 0;
else if (err != 0)
return err;
fd = fopen(cmdargs.infile, "rb");
if (!fd) {
fprintf(stderr, "Cannot open input file %s\n", cmdargs.infile);
return 2;
}
err = -1;
file = find_file(fd);
if (!file)
goto out_close;
if (cmdargs.identify_only) {
err = 0;
goto out_close;
}
extract_fw(FIRMWARE_UCODE_2, file->flags, file->uc2_pos, file->uc2_length);
extract_fw(FIRMWARE_UCODE_4, file->flags, file->uc4_pos, file->uc4_length);
extract_fw(FIRMWARE_UCODE_5, file->flags, file->uc5_pos, file->uc5_length);
extract_fw(FIRMWARE_UCODE_11, file->flags, file->uc11_pos, file->uc11_length);
extract_fw(FIRMWARE_PCM_4, file->flags, file->pcm4_pos, file->pcm4_length);
extract_fw(FIRMWARE_PCM_5, file->flags, file->pcm5_pos, file->pcm5_length);
extract_iv(file->flags, file->iv_pos);
err = 0;
out_close:
fclose(fd);
return err;
}
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