1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2020 Andreas Boehler <dev@aboehler.at>
*
* This tool was based on:
* firmware-crc.pl by Atheros Communications
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation.
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <getopt.h> /* for getopt() */
#include <byteswap.h>
char *infile;
char *outfile;
char *progname;
enum {
MODEL_3390,
MODEL_X490
} model;
#define CHUNK_SIZE 256
uint32_t crc32_for_byte(uint32_t r)
{
for (int j = 0; j < 8; ++j)
r = (r & 1 ? 0 : (uint32_t)0xEDB88320L) ^ r >> 1;
return r ^ (uint32_t)0xFF000000L;
}
void crc32(const void *data, size_t n_bytes, uint32_t *crc)
{
static uint32_t table[0x100];
if (!*table)
for (size_t i = 0; i < 0x100; ++i)
table[i] = crc32_for_byte(i);
for (size_t i = 0; i < n_bytes; ++i)
*crc = table[(uint8_t)*crc ^ ((uint8_t *)data)[i]] ^ *crc >> 8;
}
static void usage(int status)
{
fprintf(stderr, "Usage: %s [OPTIONS...]\n", progname);
fprintf(stderr,
"\n"
"Options:\n"
" -i input file name\n"
" -o output file name\n"
" -m model (3390, x490 for 3490/5490/7490)\n"
" -h show this screen\n"
);
exit(status);
}
int main(int argc, char *argv[])
{
uint32_t crc = 0;
FILE *in_fp;
FILE *out_fp;
uint32_t buf[CHUNK_SIZE];
size_t read;
progname = argv[0];
while (1) {
int c;
c = getopt(argc, argv, "i:o:m:h");
if (c == -1)
break;
switch (c) {
case 'i':
infile = optarg;
break;
case 'o':
outfile = optarg;
break;
case 'm':
if (strcmp(optarg, "3390") == 0)
model = MODEL_3390;
else if (strcmp(optarg, "x490") == 0)
model = MODEL_X490;
else
usage(EXIT_FAILURE);
break;
case 'h':
usage(EXIT_SUCCESS);
default:
usage(EXIT_FAILURE);
break;
}
}
if (!infile || !outfile)
usage(EXIT_FAILURE);
in_fp = fopen(infile, "r");
if (!in_fp) {
fprintf(stderr, "Error opening input file: %s\n", infile);
return EXIT_FAILURE;
}
out_fp = fopen(outfile, "w");
if (!out_fp) {
fprintf(stderr, "Error opening output file: %s\n", outfile);
fclose(in_fp);
return EXIT_FAILURE;
}
while (!feof(in_fp)) {
switch (model) {
case MODEL_3390:
read = fread(buf, sizeof(uint32_t), CHUNK_SIZE, in_fp);
if (ferror(in_fp)) {
fprintf(stderr, "Error reading input file: %s\n", infile);
fclose(in_fp);
fclose(out_fp);
return EXIT_FAILURE;
}
for (int i = 0; i < read; i++)
crc = crc ^ buf[i];
fwrite(buf, sizeof(uint32_t), read, out_fp);
if (ferror(out_fp)) {
fprintf(stderr, "Error writing output file: %s\n", outfile);
fclose(in_fp);
fclose(out_fp);
return EXIT_FAILURE;
}
break;
case MODEL_X490:
read = fread(buf, 1, sizeof(uint32_t) * CHUNK_SIZE, in_fp);
if (ferror(in_fp)) {
fprintf(stderr, "Error reading input file: %s\n", infile);
fclose(in_fp);
fclose(out_fp);
return EXIT_FAILURE;
}
crc32(buf, read, &crc);
fwrite(buf, 1, read, out_fp);
if (ferror(out_fp)) {
fprintf(stderr, "Error writing output file: %s\n", outfile);
fclose(in_fp);
fclose(out_fp);
return EXIT_FAILURE;
}
break;
}
}
if (model == MODEL_X490)
crc = bswap_32(crc);
fwrite(&crc, sizeof(uint32_t), 1, out_fp);
if (ferror(out_fp)) {
fprintf(stderr, "Error writing checksum to output file: %s\n", outfile);
fclose(in_fp);
fclose(out_fp);
return EXIT_FAILURE;
}
fclose(in_fp);
fclose(out_fp);
printf("Done.\n");
return EXIT_SUCCESS;
}
|
