226f7507b26f14b187b726419307917ccae3476c
[openwrt/svn-archive/archive.git] / tools / firmware-utils / src / airlink.c
1 /*
2 * Thanks to Vassily Galinsky for this tool
3 *****************************************************************************
4 AIRLINK AR525W firmware image structure
5 -8:-5 Extended (httpd) header checksum - sum2
6 -4:-1 Extended (httpd) header magic - "ARRN" - 0x4e525241
7 0: 3 Standard (tftpd) header magic - "GMTK" - 0x4b544d47
8 4: 7 Standard (tftpd) header checksum - sum1
9 8: b 0
10 c: f Size of compressed linux kernel
11 10:13 Size of firmware image file with standard header
12 14:17 Product code - 0x5
13 18:1b Bootloader checksum - sum0
14 1c:1f 0
15 20: Compressed linux kernel
16 - Squashfs or jffs2 file system - kernel dependent - either 32 bytes or sector aligned
17 *****************************************************************************/
18 #include <stdio.h>
19 #include <stdlib.h>
20 #include <unistd.h>
21 #include <sys/mman.h>
22 #include <sys/types.h>
23 #include <sys/stat.h>
24 #include <fcntl.h>
25
26 typedef unsigned long u32;
27 typedef unsigned char uchar;
28
29 u32 crctab[257] = {
30 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
31 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
32 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
33 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
34 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
35 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
36 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
37 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
38 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
39 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
40 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
41 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
42 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
43 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
44 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
45 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
46 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
47 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
48 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
49 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
50 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
51 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
52 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
53 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
54 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
55 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
56 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
57 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
58 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
59 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
60 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
61 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
62 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
63 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
64 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
65 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
66 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
67 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
68 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
69 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
70 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
71 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
72 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
73 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
74 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
75 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
76 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
77 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
78 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
79 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
80 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
81 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
82 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
83 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
84 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
85 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
86 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
87 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
88 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
89 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
90 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
91 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
92 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
93 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
94 0
95 };
96
97 u32 header[] = {
98 0x00000000, 0x4e525241,
99 0x4b544d47, 0x00000000, 0x00000000, 0x000afd4a,
100 0x00000000, 0x00000005, 0x00000000, 0x00000000
101 };
102
103 static int JFFS2 = 0x20;
104
105 int generate_image(char *kname, char *fsname, char *fname, int EHDR)
106 {
107 int i;
108 u32 lenk, lens;
109 uchar *bk, *bs;
110 int fkd, ffd, fsd;
111 fkd = open(kname, O_RDONLY);
112 ffd = creat(fname, 0x644);
113 if ((fkd < 0) || (ffd < 0))
114 return -1;
115 if (fsname) {
116 fsd = open(fsname, O_RDONLY);
117 if (fsd < 0)
118 return -1;
119 }
120 lenk = lseek(fkd, 0, SEEK_END);
121 header[5] = lenk;
122 bk = (uchar *) mmap(NULL, lenk, PROT_READ, MAP_SHARED, fkd, 0);
123 if (bk == MAP_FAILED)
124 return -1;
125 if (fsname) {
126 lens = lseek(fsd, 0, SEEK_END);
127 bs = (uchar *) mmap(NULL, lens, PROT_READ, MAP_SHARED, fsd,
128 0);
129 if (bs == MAP_FAILED)
130 return -1;
131 }
132 if (EHDR)
133 write(ffd, header, 0x28);
134 else
135 write(ffd, header + 2, 0x20);
136 write(ffd, bk, lenk);
137 printf("Padding header+kernel - 0x%x + 0x%x = 0x%x\n",
138 lenk, ((lenk - 1 + JFFS2) / JFFS2) * JFFS2 - lenk,
139 ((lenk - 1 + JFFS2) / JFFS2) * JFFS2);
140 for (i = 0; i < ((lenk - 1 + JFFS2) / JFFS2) * JFFS2 - lenk; i++)
141 write(ffd, header, 1);
142 if (fsname) {
143 write(ffd, bs, lens);
144 close(fsd);
145 }
146 close(ffd);
147 close(fkd);
148 return 0;
149 }
150
151 u32 crc32(uchar * buf, u32 len)
152 {
153 register int i;
154 u32 sum;
155 register u32 s0;
156 s0 = ~0;
157 for (i = 0; i < len; i++) {
158 s0 = (s0 >> 8) ^ crctab[(uchar) (s0 & 0xFF) ^ buf[i]];
159 }
160 sum = ~s0;
161 return sum;
162 }
163
164 void usage(char *prog)
165 {
166 printf("Usage: %s [-b 0/1] image_filename \n", prog);
167 printf(" update checksums for firmware file\n");
168 printf
169 ("Usage: %s [-b 0/1] [-j erasesize_in_kibytes] [-e] kernel filesystem image_filename \n",
170 prog);
171 printf(" generate firmware file and update checksums\n");
172 printf("--------------------------------------------------\n");
173 printf(" -e - generate header for web upload\n");
174 printf(" -b 0/1 - clear/update bootloader checksum\n");
175 printf(" -j erasesize_in_kibytes - generate header for jffs2 filesystem\n");
176 }
177
178 int main(int argc, char **argv)
179 {
180 uchar b[0x400];
181 char EHDR = 0;
182 char BHDR = 0;
183 int c, fd;
184 extern char *optarg;
185 extern int optind, optopt;
186
187 while ((c = getopt(argc, argv, "b:ej:")) != -1) {
188 switch (c) {
189 case 'b':
190 if (optarg[0] == '1')
191 BHDR = 1;
192 break;
193 case 'e':
194 EHDR = 1;
195 break;
196 case 'j':
197 sscanf(optarg, "%i", &JFFS2);
198 JFFS2 *= 1024;
199 break;
200 case '?':
201 fprintf(stderr, "\nError: unknown arg %c\n\n\n",
202 optopt);
203 usage(argv[0]);
204 exit(-1);
205 }
206 }
207 if (((argc - optind) < 1) && ((argc - optind) > 3)) {
208 usage(argv[0]);
209 exit(-1);
210 }
211 if ((argc - optind) == 3)
212 if (generate_image
213 (argv[optind], argv[optind + 1], argv[optind + 2],
214 EHDR)) {
215 fprintf(stderr,
216 "\nError generating image file %s\n\n\n",
217 argv[argc - 1]);
218 usage(argv[0]);
219 exit(-1);
220 }
221 if ((argc - optind) == 2)
222 if (generate_image
223 (argv[optind], NULL, argv[optind + 1], EHDR)) {
224 fprintf(stderr,
225 "\nError generating image file %s\n\n\n",
226 argv[argc - 1]);
227 usage(argv[0]);
228 exit(-1);
229 }
230
231 fd = open(argv[argc - 1], O_RDWR);
232 if (fd < 0) {
233 fprintf(stderr, "\nImage file not found %s\n\n\n",
234 argv[argc - 1]);
235 usage(argv[0]);
236 exit(-1);
237 }
238 long i, len = lseek(fd, 0, SEEK_END);
239 lseek(fd, 0, SEEK_SET);
240 uchar *buf = malloc(len);
241 read(fd, buf, len);
242 u32 sum, l0;
243 u32 MagicS = 0x4b544d47;
244 u32 MagicE = 0x4e525241;
245 if (*((u32 *) buf) == MagicS) {
246 fprintf(stderr,
247 "Image without extra 8 bytes - Standard header\n");
248 *((u32 *) (buf + 0x10)) = len;
249 lseek(fd, 0x10, SEEK_SET);
250 write(fd, buf + 0x10, 0x4);
251 EHDR = 0;
252 } else if ((*((u32 *) (buf + 0x8)) == MagicS)
253 && ((*((u32 *) (buf + 0x4)) == MagicE))) {
254 fprintf(stderr,
255 "Image with extra 8 bytes - Extended header\n");
256 *((u32 *) (buf + 0x18)) = len - 8;
257 lseek(fd, 0x18, SEEK_SET);
258 write(fd, buf + 0x18, 0x4);
259 buf += 8;
260 EHDR = 1;
261 } else if (len == *((u32 *) (buf + 0x10))) {
262 fprintf(stderr,
263 "Image without extra 8 bytes - Standard header\n");
264 EHDR = 0;
265 } else if (len == *((u32 *) (buf + 0x18)) + 8) {
266 fprintf(stderr,
267 "Image with extra 8 bytes - Extended header\n");
268 buf += 8;
269 EHDR = 1;
270 } else {
271 fprintf(stderr, "ERROR: Wrong image size\n");
272 exit(-1);
273 }
274 l0 = *((u32 *) & buf[0x10]);
275 if (!BHDR)
276 *((u32 *) & buf[0x18]) = 0;
277 unsigned long sum0 = *((u32 *) & buf[0x18]);
278 unsigned long sum1 = *((u32 *) & buf[0x4]);
279 *((u32 *) & buf[0x4]) = 0x0L;
280 for (i = 0; i < 0x100; i++)
281 b[i] = buf[i];
282 for (i = 0; i < 0x100; i++)
283 b[0x100 + i] = buf[(l0 >> 1) + i];
284 for (i = 0; i < 0x200; i++)
285 b[0x200 + i] = buf[l0 - 0x200 + i];
286 *((u32 *) & b[0x18]) = 0x0L;
287
288 sum = crc32(b, 0x400);
289 printf("CRC32 sum0 - (%x, %x, %x)\n", sum, sum0, 0x400);
290 if (EHDR)
291 lseek(fd, 0x20, SEEK_SET);
292 else
293 lseek(fd, 0x18, SEEK_SET);
294 if (BHDR)
295 *((u32 *) & buf[0x18]) = sum;
296 else
297 *((u32 *) & buf[0x18]) = sum0;
298 write(fd, &buf[0x18], 0x4);
299
300 sum = crc32(buf, l0);
301 printf("CRC32 sum1 - (%x, %x, %x)\n", sum, sum1, l0);
302 if (EHDR)
303 lseek(fd, 0xC, SEEK_SET);
304 else
305 lseek(fd, 0x4, SEEK_SET);
306 *((u32 *) & buf[0x4]) = sum;
307 write(fd, &buf[0x4], 0x4);
308 if (EHDR) {
309 unsigned long sum2 = *((u32 *) & buf[-0x8]);
310 *((u32 *) & buf[-0x8]) = 0L;
311 sum = crc32(buf - 0x4, len - 0x4);
312 sum = htonl(sum);
313 printf("CRC32 sum2 - (%x, %x, %x)\n", sum, sum2,
314 len - 0x4);
315 lseek(fd, 0, SEEK_SET);
316 *((u32 *) & buf[-0x8]) = sum;
317 write(fd, &buf[-0x8], 0x4);
318 buf -= 8;
319 }
320 close(fd);
321 free(buf);
322 return 0;
323 }