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
172
173
174
175
176
177
178
179
180
|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2012-2013 Intel Corporation
*
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#define _GNU_SOURCE
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <getopt.h>
#include <stdlib.h>
#include <stdint.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include <src/shared/util.h>
#define CONFIG_MAGIC 0x8723ab55
static const char *offset_to_str(uint16_t offset)
{
switch (offset) {
case 0x00f4:
return "PCM_SETTING";
case 0x000c:
return "UART_CONFIG";
case 0x003c:
return "BD_ADDR";
}
return NULL;
}
static void analyze_memory(const uint8_t *buf, size_t len)
{
const uint8_t *ptr = buf;
uint32_t magic;
uint16_t datalen;
if (len < 6) {
fprintf(stderr, "Invalid file length of %zu bytes\n", len);
return;
}
magic = get_le32(ptr);
datalen = get_le16(ptr + 4);
printf("Signature: 0x%8.8x\n", magic);
printf("Data len: %u\n", datalen);
if (magic != CONFIG_MAGIC) {
fprintf(stderr, "Unsupported file signature\n");
return;
}
ptr += 6;
while (ptr < buf + datalen + 6) {
uint16_t offset;
uint8_t plen;
const char *str;
unsigned int i;
offset = get_le16(ptr);
plen = get_u8(ptr + 2);
if (ptr + plen + 3 > buf + datalen + 6) {
fprintf(stderr, "Invalid config entry size\n");
break;
}
str = offset_to_str(offset);
printf("len=%-3u offset=%4.4x,{ ", plen, offset);
for (i = 0; i < plen; i++)
printf("%2.2x ", ptr[3 + i]);
printf("}%s%s\n", str ? "," : "", str ? : "");
ptr += plen + 3;
}
}
static void analyze_file(const char *pathname)
{
struct stat st;
void *map;
int fd;
printf("Analyzing %s\n", pathname);
fd = open(pathname, O_RDONLY | O_CLOEXEC);
if (fd < 0) {
perror("Failed to open file");
return;
}
if (fstat(fd, &st) < 0) {
fprintf(stderr, "Failed get file size\n");
close(fd);
return;
}
if (st.st_size == 0) {
fprintf(stderr, "Empty file\n");
close(fd);
return;
}
map = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (!map || map == MAP_FAILED) {
fprintf(stderr, "Failed to map file\n");
close(fd);
return;
}
analyze_memory(map, st.st_size);
munmap(map, st.st_size);
close(fd);
}
static void usage(void)
{
printf("Realtek Bluetooth firmware analyzer\n"
"Usage:\n");
printf("\trtlfw [options] <file>\n");
printf("Options:\n"
"\t-h, --help Show help options\n");
}
static const struct option main_options[] = {
{ "version", no_argument, NULL, 'v' },
{ "help", no_argument, NULL, 'h' },
{ }
};
int main(int argc, char *argv[])
{
int i;
for (;;) {
int opt;
opt = getopt_long(argc, argv, "vh", main_options, NULL);
if (opt < 0)
break;
switch (opt) {
case 'v':
printf("%s\n", VERSION);
return EXIT_SUCCESS;
case 'h':
usage();
return EXIT_SUCCESS;
default:
return EXIT_FAILURE;
}
}
if (argc - optind < 1) {
fprintf(stderr, "No input firmware files provided\n");
return EXIT_FAILURE;
}
for (i = optind; i < argc; i++)
analyze_file(argv[i]);
return EXIT_SUCCESS;
}
|
