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
181
182
183
184
185
186
|
/*
* trx2usr - Convert a TRX firmware image to a U.S. Robotics firmware
* image by prepending a 28-byte header.
*
* This program was modeled after the usr-hdr.c program from the GPL'ed
* firmware for the U.S. Robotics Wireless MAXg Router (USR5461). The
* output file of this program can be uploaded via the web interface
* of the original U.S. Robotics firmware. Note that this program only
* works on a little-endian host platform.
*
* Copyright (C) 2006 Dick Streefland
*
* This is free software, licensed under the terms of the GNU General
* Public License as published by the Free Software Foundation.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#define TRX_MAGIC "HDR0"
#define USR_MAGIC 0x30525355 // "USR0"
#define EPI_VERSION 0x06235d03
#define COMPAT_ID 1 // USR5461
#define HARDWARE_REV 1
#define CRC32_INIT 0xffffffff
#define CHUNK (64*1024)
typedef unsigned char uint8;
typedef unsigned short uint16;
typedef unsigned int uint32;
struct usr_header
{
uint32 magic; // "USR0"
uint32 len; // file length without this header
uint32 crc32; // CRC32 of the file without header
uint32 version; // EPI_VERSION
uint16 compatibility_id; // COMPAT_ID
uint16 hardware_revision; // HARDWARE_REV
uint32 reserved[2];
};
static const uint32 crc_32_tab [] = // CRC polynomial 0xedb88320
{
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f,
0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 0x1db71064, 0x6ab020f2,
0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9,
0xfa0f3d63, 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 0x42b2986c,
0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423,
0xcfba9599, 0xb8bda50f, 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106,
0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d,
0x91646c97, 0xe6635c01, 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950,
0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7,
0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, 0x5005713c, 0x270241aa,
0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81,
0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 0xe3630b12, 0x94643b84,
0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb,
0x196c3671, 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 0xa1d1937e,
0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55,
0x316e8eef, 0x4669be79, 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28,
0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f,
0x72076785, 0x05005713, 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242,
0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69,
0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, 0xaed16a4a, 0xd9d65adc,
0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693,
0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
static char buf[CHUNK];
static uint32 crc32(uint32 crc, uint8* p, size_t n)
{
while (n--)
{
crc = crc_32_tab[(crc ^ *p++) & 0xff] ^ (crc >> 8);
}
return crc;
}
static int trx2usr(FILE* trx, FILE* usr)
{
struct usr_header hdr;
size_t n;
hdr.magic = USR_MAGIC;
hdr.len = 0;
hdr.crc32 = CRC32_INIT;
hdr.version = EPI_VERSION;
hdr.compatibility_id = COMPAT_ID;
hdr.hardware_revision = HARDWARE_REV;
hdr.reserved[0] = 0;
hdr.reserved[1] = 0;
fwrite(& hdr, sizeof(hdr), 1, usr);
while ((n = fread(buf, 1, CHUNK, trx)))
{
if (hdr.len == 0 && strncmp(buf, TRX_MAGIC, strlen(TRX_MAGIC)) != 0)
{
break;
}
fwrite(& buf, 1, n, usr);
hdr.len += n;
hdr.crc32 = crc32( hdr.crc32, (uint8 *) & buf, n);
}
fseek(usr, 0L, SEEK_SET);
fwrite(& hdr, sizeof(hdr), 1, usr);
if (n != 0)
{
fprintf(stderr, "Input is not a TRX file\n");
return 1;
}
if (hdr.len == 0)
{
fprintf(stderr, "Empty input\n");
return 1;
}
if (ferror(trx))
{
fprintf(stderr, "Read error\n");
return 1;
}
if (ferror(usr))
{
fprintf(stderr, "Write error\n");
return 1;
}
return 0;
}
extern int main(int argc, char *argv[])
{
FILE* in;
FILE* out;
int ret;
if (argc != 3)
{
fprintf(stderr, "Usage: trx2usr <trx input> <usr output>\n");
exit(2);
}
in = fopen(argv[1], "rb");
if (!in)
{
fprintf(stderr, "Cannot open \"%s\": %s\n", argv[1], strerror(errno));
exit(1);
}
out = fopen(argv[2], "wb");
if (!out)
{
fprintf(stderr, "Cannot create \"%s\": %s\n", argv[2], strerror(errno));
exit(1);
}
ret = trx2usr(in, out);
fclose(in);
fclose(out);
if (ret)
{
unlink(argv[2]);
}
return ret;
}
|
