1/*
2 * Copyright (C) 2007 Ubiquiti Networks, Inc.
3 * Copyright (C) 2008 Lukas Kuna <ValXdater@seznam.cz>
4 * Copyright (C) 2008 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14 * General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#include <sys/types.h>
22#include <sys/stat.h>
23#include <fcntl.h>
24#include <unistd.h>
25#include <string.h>
26#include <errno.h>
27#include <zlib.h>
28#include <sys/mman.h>
29#include <netinet/in.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <limits.h>
33#include "fw.h"
34
35#undef VERSION
36#define VERSION "1.2-OpenWrt.1"
37
38#define MAX_SECTIONS		8
39#define DEFAULT_OUTPUT_FILE 	"firmware-image.bin"
40#define DEFAULT_VERSION		"UNKNOWN"
41#define DEFAULT_FLASH_BASE	(0xbfc00000)
42
43#define FIRMWARE_MAX_LENGTH	(0x390000)
44
45typedef struct part_data {
46	char 		partition_name[64];
47	int  		partition_index;
48	u_int32_t	partition_baseaddr;
49	u_int32_t	partition_offset;
50	u_int32_t	partition_memaddr;
51	u_int32_t	partition_entryaddr;
52	u_int32_t	partition_length;
53
54	char		filename[PATH_MAX];
55	struct stat	stats;
56} part_data_t;
57
58typedef struct image_info {
59	char		version[256];
60	char		outputfile[PATH_MAX];
61	char		magic[MAGIC_LENGTH];
62	u_int32_t	flash_baseaddr;
63	u_int32_t	part_count;
64	part_data_t	parts[MAX_SECTIONS];
65} image_info_t;
66
67static image_info_t im;
68static int debug = 0;
69static int zero_part_baseaddr = 0;
70
71static void write_header(void* mem, const char* version)
72{
73	header_t* header = mem;
74	memset(header, 0, sizeof(header_t));
75
76	memcpy(header->magic, im.magic, MAGIC_LENGTH);
77	strncpy(header->version, version, sizeof(header->version));
78	header->crc = htonl(crc32(0L, (unsigned char *)header,
79				sizeof(header_t) - 2 * sizeof(u_int32_t)));
80	header->pad = 0L;
81}
82
83static void write_signature(void* mem, u_int32_t sig_offset)
84{
85	/* write signature */
86	signature_t* sign = (signature_t*)(mem + sig_offset);
87	memset(sign, 0, sizeof(signature_t));
88
89	memcpy(sign->magic, MAGIC_END, MAGIC_LENGTH);
90	sign->crc = htonl(crc32(0L,(unsigned char *)mem, sig_offset));
91	sign->pad = 0L;
92}
93
94static int write_part(void* mem, part_data_t* d)
95{
96	char* addr;
97	int fd;
98	part_t* p = mem;
99	part_crc_t* crc = mem + sizeof(part_t) + d->stats.st_size;
100
101	fd = open(d->filename, O_RDONLY);
102	if (fd < 0) {
103		ERROR("Failed opening file '%s'\n", d->filename);
104		return -1;
105	}
106
107	if ((addr=(char*)mmap(0, d->stats.st_size, PROT_READ, MAP_SHARED, fd, 0)) == MAP_FAILED) {
108		ERROR("Failed mmaping memory for file '%s'\n", d->filename);
109		close(fd);
110		return -2;
111	}
112
113	memcpy(mem + sizeof(part_t), addr, d->stats.st_size);
114	munmap(addr, d->stats.st_size);
115
116	memset(p->name, 0, sizeof(p->name));
117	strncpy(p->magic, MAGIC_PART, MAGIC_LENGTH);
118	strncpy(p->name, d->partition_name, sizeof(p->name));
119	p->index = htonl(d->partition_index);
120	p->data_size = htonl(d->stats.st_size);
121	p->part_size = htonl(d->partition_length);
122	p->baseaddr = htonl(d->partition_baseaddr);
123	p->memaddr = htonl(d->partition_memaddr);
124	p->entryaddr = htonl(d->partition_entryaddr);
125
126	crc->crc = htonl(crc32(0L, mem, d->stats.st_size + sizeof(part_t)));
127	crc->pad = 0L;
128
129	return 0;
130}
131
132static void usage(const char* progname)
133{
134	INFO("Version %s\n"
135             "Usage: %s [options]\n"
136	     "\t-v <version string>\t - firmware version information, default: %s\n"
137	     "\t-m <magic>\t\t - firmware magic, default: %s\n"
138	     "\t-f <flash base>\t\t - flash base address, default: 0x%08x\n"
139	     "\t-o <output file>\t - firmware output file, default: %s\n"
140	     "\t-p <name>:<offset>:<len>:<memaddr>:<entry>:<file>\n "
141	     "\t\t\t\t - create a partition from <file>\n"
142	     "\t-z\t\t\t - set partition offsets to zero\n"
143	     "\t-h\t\t\t - this help\n",
144	     VERSION, progname, DEFAULT_VERSION, MAGIC_HEADER,
145	     DEFAULT_FLASH_BASE, DEFAULT_OUTPUT_FILE);
146}
147
148static void print_image_info(void)
149{
150	int i;
151
152	INFO("Firmware version : '%s'\n"
153	     "Output file      : '%s'\n"
154	     "Part count       : %u\n",
155	     im.version, im.outputfile, im.part_count);
156
157	for (i = 0; i < im.part_count; ++i) {
158		const part_data_t* d = &im.parts[i];
159		INFO("  %10s: %08x %08x %08x %08x %8ld bytes (free: %8ld)\n",
160		     d->partition_name,
161		     d->partition_baseaddr,
162		     d->partition_length,
163		     d->partition_entryaddr,
164		     d->partition_memaddr,
165		     d->stats.st_size,
166		     d->partition_length - d->stats.st_size);
167	}
168}
169
170static int filelength(const char* file)
171{
172	FILE *p;
173	int ret = -1;
174
175	if ( (p = fopen(file, "rb") ) == NULL) return (-1);
176
177	fseek(p, 0, SEEK_END);
178	ret = ftell(p);
179
180	fclose (p);
181
182	return (ret);
183}
184
185int str2u32(char *arg, u_int32_t *val)
186{
187	char *err = NULL;
188	uint32_t t;
189
190	errno = 0;
191	t = strtoul(arg, &err, 0);
192	if (errno || (err == arg) || ((err != NULL) && *err)) {
193		return -1;
194	}
195
196	*val = t;
197	return 0;
198}
199
200static int image_layout_add_partition(const char *part_desc)
201{
202	part_data_t *d;
203	char memaddr[16];
204	char entryaddr[16];
205	char offset[16];
206	char length[16];
207	int t;
208
209	if (im.part_count >= MAX_SECTIONS) {
210		ERROR("Too many partitions specified\n");
211		return (-1);
212	}
213
214	d = &im.parts[im.part_count];
215	t = sscanf(part_desc, "%15[a-zA-Z]:%15[0-9a-fA-Fx]:%15[0-9a-fA-Fx]:%15[0-9a-fA-Fx]:%15[0-9a-fA-Fx]:%256s",
216			d->partition_name,
217			offset,
218			length,
219			memaddr,
220			entryaddr,
221			d->filename);
222
223	if (t != 6) {
224		ERROR("Bad partition parameter %d, '%s'\n", t, part_desc);
225		return (-1);
226	}
227
228	if (strlen(d->partition_name) == 0) {
229		ERROR("No partition name specified in '%s'\n", part_desc);
230		return (-1);
231	}
232
233	if (str2u32(offset, &d->partition_offset)) {
234		ERROR("Bad offset value '%s'\n", offset);
235		return (-1);
236	}
237
238	if (str2u32(length, &d->partition_length)) {
239		ERROR("Bad length value '%s'\n", length);
240		return (-1);
241	}
242
243	if (d->partition_length == 0) {
244		int flen;
245		flen = filelength(d->filename);
246		if (flen < 0) {
247			ERROR("Unable to determine size of '%s'\n",
248					d->filename);
249			return (-1);
250		}
251		d->partition_length = flen;
252	}
253
254	if (str2u32(memaddr, &d->partition_memaddr)) {
255		ERROR("Bad memaddr vaule '%s'\n", memaddr);
256		return (-1);
257	}
258
259	if (str2u32(entryaddr, &d->partition_entryaddr)) {
260		ERROR("Bad entry address value '%s'\n", entryaddr);
261		return (-1);
262	}
263
264	im.part_count++;
265	d->partition_index = im.part_count;
266
267	return 0;
268}
269
270static int image_layout_verify(void)
271{
272	u_int32_t offset;
273	int i;
274
275	if (im.part_count == 0) {
276		ERROR("No partitions specified\n");
277		return -1;
278	}
279
280	offset = im.parts[0].partition_offset;
281	for (i = 0; i < im.part_count; i++)
282	{
283		part_data_t* d = &im.parts[i];
284
285		if (stat(d->filename, &d->stats) < 0) {
286			ERROR("Couldn't stat file '%s' from part '%s'\n",
287					d->filename, d->partition_name);
288			return -2;
289		}
290
291		if (d->stats.st_size == 0) {
292			ERROR("File '%s' from part '%s' is empty!\n",
293					d->filename, d->partition_name);
294			return -3;
295		}
296
297		if (d->stats.st_size > d->partition_length) {
298			ERROR("File '%s' too big (%d) - max size: 0x%08X (exceeds %lu bytes)\n",
299				d->filename, i, d->partition_length,
300				d->stats.st_size - d->partition_length);
301			return -4;
302		}
303
304		if (d->partition_offset < offset)
305			d->partition_offset = offset;
306
307		if (zero_part_baseaddr) {
308			d->partition_baseaddr = 0;
309		} else {
310			d->partition_baseaddr =
311				im.flash_baseaddr + d->partition_offset;
312		}
313		offset += d->partition_length;
314	}
315
316	return 0;
317}
318
319static int build_image(void)
320{
321	char* mem;
322	char* ptr;
323	u_int32_t mem_size;
324	FILE* f;
325	int i;
326
327	/* build in-memory buffer */
328	mem_size = sizeof(header_t) + sizeof(signature_t);
329	for (i = 0; i < im.part_count; ++i) {
330		part_data_t* d = &im.parts[i];
331		mem_size += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
332	}
333
334	mem = (char*)calloc(mem_size, 1);
335	if (mem == NULL) {
336		ERROR("Cannot allocate memory chunk of size '%u'\n", mem_size);
337		return -1;
338	}
339
340	/* write header */
341	write_header(mem, im.version);
342	ptr = mem + sizeof(header_t);
343
344	/* write all parts */
345	for (i = 0; i < im.part_count; ++i) {
346		part_data_t* d = &im.parts[i];
347		int rc;
348		if ((rc = write_part(ptr, d)) != 0) {
349			ERROR("ERROR: failed writing part %u '%s'\n", i, d->partition_name);
350			return -1;
351		}
352		ptr += sizeof(part_t) + d->stats.st_size + sizeof(part_crc_t);
353	}
354
355
356	/* write signature */
357	write_signature(mem, mem_size - sizeof(signature_t));
358
359	/* write in-memory buffer into file */
360	if ((f = fopen(im.outputfile, "w")) == NULL) {
361		ERROR("Can not create output file: '%s'\n", im.outputfile);
362		return -10;
363	}
364
365	if (fwrite(mem, mem_size, 1, f) != 1) {
366		ERROR("Could not write %d bytes into file: '%s'\n",
367				mem_size, im.outputfile);
368		return -11;
369	}
370
371	free(mem);
372	fclose(f);
373	return 0;
374}
375
376int main(int argc, char* argv[])
377{
378	int o, rc;
379
380	memset(&im, 0, sizeof(im));
381
382	strcpy(im.outputfile, DEFAULT_OUTPUT_FILE);
383	strcpy(im.version, DEFAULT_VERSION);
384	memcpy(im.magic, MAGIC_HEADER, MAGIC_LENGTH);
385	im.flash_baseaddr = DEFAULT_FLASH_BASE;
386
387	while ((o = getopt(argc, argv, "f:hm:o:p:v:z")) != -1)
388	{
389		switch (o) {
390		case 'f':
391			if (optarg)
392				if (str2u32(optarg, &im.flash_baseaddr)) {
393					ERROR("Invalid flash start address %s\n", optarg);
394					return -1;
395				}
396			break;
397		case 'h':
398			usage(argv[0]);
399			return -1;
400		case 'm':
401			if (optarg) {
402				if (strlen(optarg) != MAGIC_LENGTH) {
403					ERROR("Invalid magic %s\n", optarg);
404					return -1;
405				}
406
407				memcpy(im.magic, optarg, MAGIC_LENGTH);
408			}
409			break;
410		case 'o':
411			if (optarg)
412				strncpy(im.outputfile, optarg, sizeof(im.outputfile));
413			break;
414		case 'p':
415			if (optarg) {
416				if (image_layout_add_partition(optarg))
417					return -1;
418			}
419			break;
420		case 'v':
421			if (optarg)
422				strncpy(im.version, optarg, sizeof(im.version));
423			break;
424		case 'z':
425			zero_part_baseaddr = 1;
426			break;
427		}
428	}
429
430	rc = image_layout_verify();
431	if (rc)	{
432		ERROR("Failed validating firmware layout - error code: %d\n",
433				rc);
434		return -4;
435	}
436
437	print_image_info();
438
439	rc = build_image();
440	if (rc)	{
441		ERROR("Failed building image file '%s' - error code: %d\n",
442				im.outputfile, rc);
443		return -5;
444	}
445
446	return 0;
447}
448