firmware-utils: add a tool TP-Link v2 image generation

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>

SVN-Revision: 37726

2 files changed, 945 insertions, 0 deletions

diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile
index c0d577e..45690f5 100644
--- a/tools/firmware-utils/Makefile
+++ b/tools/firmware-utils/Makefile
@@ -40,6 +40,7 @@ define Host/Compile
 	$(call cc,nand_ecc)
 	$(call cc,mkplanexfw sha1)
 	$(call cc,mktplinkfw md5)
+	$(call cc,mktplinkfw2 md5)
 	$(call cc,pc1crypt)
 	$(call cc,osbridge-crc)
 	$(call cc,wrt400n cyg_crc32)
diff --git a/tools/firmware-utils/src/mktplinkfw2.c b/tools/firmware-utils/src/mktplinkfw2.c
new file mode 100644
index 0000000..df64ac3
--- /dev/null
+++ b/tools/firmware-utils/src/mktplinkfw2.c
@@ -0,0 +1,944 @@
+/*
+ * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * This tool was based on:
+ *   TP-Link WR941 V2 firmware checksum fixing tool.
+ *   Copyright (C) 2008,2009 Wang Jian <lark@linux.net.cn>
+ *
+ * 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 <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>     /* for unlink() */
+#include <libgen.h>
+#include <getopt.h>     /* for getopt() */
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+#include <arpa/inet.h>
+#include <netinet/in.h>
+
+#include "md5.h"
+
+#define ALIGN(x,a) ({ typeof(a) __a = (a); (((x) + __a - 1) & ~(__a - 1)); })
+
+#define HEADER_VERSION_V2	0x02000000
+
+#define HWID_TD_W8970_V1		0x89700001
+
+#define MD5SUM_LEN	16
+
+struct file_info {
+	char		*file_name;	/* name of the file */
+	uint32_t	file_size;	/* length of the file */
+};
+
+struct fw_header {
+	uint32_t	version;	/* 0x00: header version */
+	char		fw_version[48]; /* 0x04: fw version string */
+	uint32_t	hw_id;		/* 0x34: hardware id */
+	uint32_t	hw_rev;		/* 0x38: FIXME: hardware revision? */
+	uint32_t	unk1;	        /* 0x3c: 0x00000000 */
+	uint8_t		md5sum1[MD5SUM_LEN]; /* 0x40 */
+	uint32_t	unk2;		/* 0x50: 0x00000000 */
+	uint8_t		md5sum2[MD5SUM_LEN]; /* 0x54 */
+	uint32_t	unk3;		/* 0x64: 0xffffffff */
+
+	uint32_t	kernel_la;	/* 0x68: kernel load address */
+	uint32_t	kernel_ep;	/* 0x6c: kernel entry point */
+	uint32_t	fw_length;	/* 0x70: total length of the image */
+	uint32_t	kernel_ofs;	/* 0x74: kernel data offset */
+	uint32_t	kernel_len;	/* 0x78: kernel data length */
+	uint32_t	rootfs_ofs;	/* 0x7c: rootfs data offset */
+	uint32_t	rootfs_len;	/* 0x80: rootfs data length */
+	uint32_t	boot_ofs;	/* 0x84: FIXME: seems to be unused */
+	uint32_t	boot_len;	/* 0x88: FIXME: seems to be unused */
+	uint16_t	unk4;		/* 0x8c: 0x55aa */
+	uint8_t		sver_hi;	/* 0x8e */
+	uint8_t		sver_lo;	/* 0x8f */
+	uint8_t		unk5;		/* 0x90: magic: 0xa5 */
+	uint8_t		ver_hi;         /* 0x91 */
+	uint8_t		ver_mid;        /* 0x92 */
+	uint8_t		ver_lo;         /* 0x93 */
+	uint8_t		pad[364];
+} __attribute__ ((packed));
+
+struct flash_layout {
+	char		*id;
+	uint32_t	fw_max_len;
+	uint32_t	kernel_la;
+	uint32_t	kernel_ep;
+	uint32_t	rootfs_ofs;
+};
+
+struct board_info {
+	char		*id;
+	uint32_t	hw_id;
+	uint32_t	hw_rev;
+	char		*layout_id;
+};
+
+/*
+ * Globals
+ */
+static char *ofname;
+static char *progname;
+static char *vendor = "TP-LINK Technologies";
+static char *version = "ver. 1.0";
+static char *fw_ver = "0.0.0";
+static char *sver = "1.0";
+
+static char *board_id;
+static struct board_info *board;
+static char *layout_id;
+static struct flash_layout *layout;
+static char *opt_hw_id;
+static uint32_t hw_id;
+static char *opt_hw_rev;
+static uint32_t hw_rev;
+static int fw_ver_lo;
+static int fw_ver_mid;
+static int fw_ver_hi;
+static int sver_lo;
+static int sver_hi;
+static struct file_info kernel_info;
+static uint32_t kernel_la = 0;
+static uint32_t kernel_ep = 0;
+static uint32_t kernel_len = 0;
+static struct file_info rootfs_info;
+static uint32_t rootfs_ofs = 0;
+static uint32_t rootfs_align;
+static struct file_info boot_info;
+static int combined;
+static int strip_padding;
+static int add_jffs2_eof;
+static unsigned char jffs2_eof_mark[4] = {0xde, 0xad, 0xc0, 0xde};
+
+static struct file_info inspect_info;
+static int extract = 0;
+
+char md5salt_normal[MD5SUM_LEN] = {
+	0xdc, 0xd7, 0x3a, 0xa5, 0xc3, 0x95, 0x98, 0xfb,
+	0xdc, 0xf9, 0xe7, 0xf4, 0x0e, 0xae, 0x47, 0x37,
+};
+
+char md5salt_boot[MD5SUM_LEN] = {
+	0x8c, 0xef, 0x33, 0x5b, 0xd5, 0xc5, 0xce, 0xfa,
+	0xa7, 0x9c, 0x28, 0xda, 0xb2, 0xe9, 0x0f, 0x42,
+};
+
+static struct flash_layout layouts[] = {
+	{
+		.id		= "8Mltq",
+		.fw_max_len	= 0x7a0000,
+		.kernel_la	= 0x80002000,
+		.kernel_ep	= 0x80002000,
+		.rootfs_ofs	= 0x140000,
+	}, {
+		/* terminating entry */
+	}
+};
+
+static struct board_info boards[] = {
+	{
+		.id		= "TD-W8970v1",
+		.hw_id		= HWID_TD_W8970_V1,
+		.hw_rev		= 1,
+		.layout_id	= "8Mltq",
+	}, {
+		/* terminating entry */
+	}
+};
+
+/*
+ * Message macros
+ */
+#define ERR(fmt, ...) do { \
+	fflush(0); \
+	fprintf(stderr, "[%s] *** error: " fmt "\n", \
+			progname, ## __VA_ARGS__ ); \
+} while (0)
+
+#define ERRS(fmt, ...) do { \
+	int save = errno; \
+	fflush(0); \
+	fprintf(stderr, "[%s] *** error: " fmt "\n", \
+			progname, ## __VA_ARGS__, strerror(save)); \
+} while (0)
+
+#define DBG(fmt, ...) do { \
+	fprintf(stderr, "[%s] " fmt "\n", progname, ## __VA_ARGS__ ); \
+} while (0)
+
+static struct board_info *find_board(char *id)
+{
+	struct board_info *ret;
+	struct board_info *board;
+
+	ret = NULL;
+	for (board = boards; board->id != NULL; board++){
+		if (strcasecmp(id, board->id) == 0) {
+			ret = board;
+			break;
+		}
+	};
+
+	return ret;
+}
+
+static struct board_info *find_board_by_hwid(uint32_t hw_id)
+{
+	struct board_info *board;
+
+	for (board = boards; board->id != NULL; board++) {
+		if (hw_id == board->hw_id)
+			return board;
+	};
+
+	return NULL;
+}
+
+static struct flash_layout *find_layout(char *id)
+{
+	struct flash_layout *ret;
+	struct flash_layout *l;
+
+	ret = NULL;
+	for (l = layouts; l->id != NULL; l++){
+		if (strcasecmp(id, l->id) == 0) {
+			ret = l;
+			break;
+		}
+	};
+
+	return ret;
+}
+
+static void usage(int status)
+{
+	FILE *stream = (status != EXIT_SUCCESS) ? stderr : stdout;
+	struct board_info *board;
+
+	fprintf(stream, "Usage: %s [OPTIONS...]\n", progname);
+	fprintf(stream,
+"\n"
+"Options:\n"
+"  -B <board>      create image for the board specified with <board>\n"
+"  -c              use combined kernel image\n"
+"  -E <ep>         overwrite kernel entry point with <ep> (hexval prefixed with 0x)\n"
+"  -L <la>         overwrite kernel load address with <la> (hexval prefixed with 0x)\n"
+"  -H <hwid>       use hardware id specified with <hwid>\n"
+"  -W <hwrev>      use hardware revision specified with <hwrev>\n"
+"  -F <id>         use flash layout specified with <id>\n"
+"  -k <file>       read kernel image from the file <file>\n"
+"  -r <file>       read rootfs image from the file <file>\n"
+"  -a <align>      align the rootfs start on an <align> bytes boundary\n"
+"  -R <offset>     overwrite rootfs offset with <offset> (hexval prefixed with 0x)\n"
+"  -o <file>       write output to the file <file>\n"
+"  -s              strip padding from the end of the image\n"
+"  -j              add jffs2 end-of-filesystem markers\n"
+"  -V <version>    set image version to <version>\n"
+"  -v <version>    set firmware version to <version>\n"
+"  -y <version>    set secondary version to <version>\n"
+"  -i <file>       inspect given firmware file <file>\n"
+"  -x              extract kernel and rootfs while inspecting (requires -i)\n"
+"  -h              show this screen\n"
+	);
+
+	exit(status);
+}
+
+static int get_md5(char *data, int size, char *md5)
+{
+	MD5_CTX ctx;
+
+	MD5_Init(&ctx);
+	MD5_Update(&ctx, data, size);
+	MD5_Final(md5, &ctx);
+}
+
+static int get_file_stat(struct file_info *fdata)
+{
+	struct stat st;
+	int res;
+
+	if (fdata->file_name == NULL)
+		return 0;
+
+	res = stat(fdata->file_name, &st);
+	if (res){
+		ERRS("stat failed on %s", fdata->file_name);
+		return res;
+	}
+
+	fdata->file_size = st.st_size;
+	return 0;
+}
+
+static int read_to_buf(struct file_info *fdata, char *buf)
+{
+	FILE *f;
+	int ret = EXIT_FAILURE;
+
+	f = fopen(fdata->file_name, "r");
+	if (f == NULL) {
+		ERRS("could not open \"%s\" for reading", fdata->file_name);
+		goto out;
+	}
+
+	errno = 0;
+	fread(buf, fdata->file_size, 1, f);
+	if (errno != 0) {
+		ERRS("unable to read from file \"%s\"", fdata->file_name);
+		goto out_close;
+	}
+
+	ret = EXIT_SUCCESS;
+
+ out_close:
+	fclose(f);
+ out:
+	return ret;
+}
+
+static int check_options(void)
+{
+	int ret;
+
+	if (inspect_info.file_name) {
+		ret = get_file_stat(&inspect_info);
+		if (ret)
+			return ret;
+
+		return 0;
+	} else if (extract) {
+		ERR("no firmware for inspection specified");
+		return -1;
+	}
+
+	if (board_id == NULL && opt_hw_id == NULL) {
+		ERR("either board or hardware id must be specified");
+		return -1;
+	}
+
+	if (board_id) {
+		board = find_board(board_id);
+		if (board == NULL) {
+			ERR("unknown/unsupported board id \"%s\"", board_id);
+			return -1;
+		}
+		if (layout_id == NULL)
+			layout_id = board->layout_id;
+
+		hw_id = board->hw_id;
+		hw_rev = board->hw_rev;
+	} else {
+		if (layout_id == NULL) {
+			ERR("flash layout is not specified");
+			return -1;
+		}
+		hw_id = strtoul(opt_hw_id, NULL, 0);
+
+		if (opt_hw_rev)
+			hw_rev = strtoul(opt_hw_rev, NULL, 0);
+		else
+			hw_rev = 1;
+	}
+
+	layout = find_layout(layout_id);
+	if (layout == NULL) {
+		ERR("unknown flash layout \"%s\"", layout_id);
+		return -1;
+	}
+
+	if (!kernel_la)
+		kernel_la = layout->kernel_la;
+	if (!kernel_ep)
+		kernel_ep = layout->kernel_ep;
+	if (!rootfs_ofs)
+		rootfs_ofs = layout->rootfs_ofs;
+
+	if (kernel_info.file_name == NULL) {
+		ERR("no kernel image specified");
+		return -1;
+	}
+
+	ret = get_file_stat(&kernel_info);
+	if (ret)
+		return ret;
+
+	kernel_len = kernel_info.file_size;
+
+	if (combined) {
+		if (kernel_info.file_size >
+		    layout->fw_max_len - sizeof(struct fw_header)) {
+			ERR("kernel image is too big");
+			return -1;
+		}
+	} else {
+		if (rootfs_info.file_name == NULL) {
+			ERR("no rootfs image specified");
+			return -1;
+		}
+
+		ret = get_file_stat(&rootfs_info);
+		if (ret)
+			return ret;
+
+		if (rootfs_align) {
+			kernel_len += sizeof(struct fw_header);
+			kernel_len = ALIGN(kernel_len, rootfs_align);
+			kernel_len -= sizeof(struct fw_header);
+
+			DBG("kernel length aligned to %u", kernel_len);
+
+			if (kernel_len + rootfs_info.file_size >
+			    layout->fw_max_len - sizeof(struct fw_header)) {
+				ERR("images are too big");
+				return -1;
+			}
+		} else {
+			if (kernel_info.file_size >
+			    rootfs_ofs - sizeof(struct fw_header)) {
+				ERR("kernel image is too big");
+				return -1;
+			}
+
+			if (rootfs_info.file_size >
+			    (layout->fw_max_len - rootfs_ofs)) {
+				ERR("rootfs image is too big");
+				return -1;
+			}
+		}
+	}
+
+	if (ofname == NULL) {
+		ERR("no output file specified");
+		return -1;
+	}
+
+	ret = sscanf(fw_ver, "%d.%d.%d", &fw_ver_hi, &fw_ver_mid, &fw_ver_lo);
+	if (ret != 3) {
+		ERR("invalid firmware version '%s'", fw_ver);
+		return -1;
+	}
+
+	ret = sscanf(sver, "%d.%d", &sver_hi, &sver_lo);
+	if (ret != 2) {
+		ERR("invalid secondary version '%s'", sver);
+		return -1;
+	}
+
+	return 0;
+}
+
+static void fill_header(char *buf, int len)
+{
+	struct fw_header *hdr = (struct fw_header *)buf;
+	unsigned ver_len;
+
+	memset(hdr, '\xff', sizeof(struct fw_header));
+
+	hdr->version = htonl(HEADER_VERSION_V2);
+	ver_len = strlen(version);
+	if (ver_len > (sizeof(hdr->fw_version) - 1))
+		ver_len = sizeof(hdr->fw_version) - 1;
+
+	memcpy(hdr->fw_version, version, ver_len);
+	hdr->fw_version[ver_len] = 0;
+
+	hdr->hw_id = htonl(hw_id);
+	hdr->hw_rev = htonl(hw_rev);
+
+	if (boot_info.file_size == 0) {
+		memcpy(hdr->md5sum1, md5salt_normal, sizeof(hdr->md5sum1));
+		hdr->boot_ofs = htonl(0);
+		hdr->boot_len = htonl(0);
+	} else {
+		memcpy(hdr->md5sum1, md5salt_boot, sizeof(hdr->md5sum1));
+		hdr->boot_ofs = htonl(rootfs_ofs + rootfs_info.file_size);
+		hdr->boot_len = htonl(rootfs_info.file_size);
+	}
+
+	hdr->kernel_la = htonl(kernel_la);
+	hdr->kernel_ep = htonl(kernel_ep);
+	hdr->fw_length = htonl(layout->fw_max_len);
+	hdr->kernel_ofs = htonl(sizeof(struct fw_header));
+	hdr->kernel_len = htonl(kernel_len);
+	if (!combined) {
+		hdr->rootfs_ofs = htonl(rootfs_ofs);
+		hdr->rootfs_len = htonl(rootfs_info.file_size);
+	}
+
+	hdr->boot_ofs = htonl(0);
+	hdr->boot_len = htonl(boot_info.file_size);
+
+	hdr->unk1 = htonl(0);
+	hdr->unk2 = htonl(0);
+	hdr->unk3 = htonl(0xffffffff);
+	hdr->unk4 = htons(0x55aa);
+	hdr->unk5 = 0xa5;
+
+	hdr->sver_hi = sver_hi;
+	hdr->sver_lo = sver_lo;
+
+	hdr->ver_hi = fw_ver_hi;
+	hdr->ver_mid = fw_ver_mid;
+	hdr->ver_lo = fw_ver_lo;
+
+	get_md5(buf, len, hdr->md5sum1);
+}
+
+static int pad_jffs2(char *buf, int currlen)
+{
+	int len;
+	uint32_t pad_mask;
+
+	len = currlen;
+	pad_mask = (64 * 1024);
+	while ((len < layout->fw_max_len) && (pad_mask != 0)) {
+		uint32_t mask;
+		int i;
+
+		for (i = 10; i < 32; i++) {
+			mask = 1 << i;
+			if (pad_mask & mask)
+				break;
+		}
+
+		len = ALIGN(len, mask);
+
+		for (i = 10; i < 32; i++) {
+			mask = 1 << i;
+			if ((len & (mask - 1)) == 0)
+				pad_mask &= ~mask;
+		}
+
+		for (i = 0; i < sizeof(jffs2_eof_mark); i++)
+			buf[len + i] = jffs2_eof_mark[i];
+
+		len += sizeof(jffs2_eof_mark);
+	}
+
+	return len;
+}
+
+static int write_fw(char *data, int len)
+{
+	FILE *f;
+	int ret = EXIT_FAILURE;
+
+	f = fopen(ofname, "w");
+	if (f == NULL) {
+		ERRS("could not open \"%s\" for writing", ofname);
+		goto out;
+	}
+
+	errno = 0;
+	fwrite(data, len, 1, f);
+	if (errno) {
+		ERRS("unable to write output file");
+		goto out_flush;
+	}
+
+	DBG("firmware file \"%s\" completed", ofname);
+
+	ret = EXIT_SUCCESS;
+
+ out_flush:
+	fflush(f);
+	fclose(f);
+	if (ret != EXIT_SUCCESS) {
+		unlink(ofname);
+	}
+ out:
+	return ret;
+}
+
+static int build_fw(void)
+{
+	int buflen;
+	char *buf;
+	char *p;
+	int ret = EXIT_FAILURE;
+	int writelen = 0;
+
+	buflen = layout->fw_max_len;
+
+	buf = malloc(buflen);
+	if (!buf) {
+		ERR("no memory for buffer\n");
+		goto out;
+	}
+
+	memset(buf, 0xff, buflen);
+	p = buf + sizeof(struct fw_header);
+	ret = read_to_buf(&kernel_info, p);
+	if (ret)
+		goto out_free_buf;
+
+	writelen = sizeof(struct fw_header) + kernel_len;
+
+	if (!combined) {
+		if (rootfs_align)
+			p = buf + writelen;
+		else
+			p = buf + rootfs_ofs;
+
+		ret = read_to_buf(&rootfs_info, p);
+		if (ret)
+			goto out_free_buf;
+
+		if (rootfs_align)
+			writelen += rootfs_info.file_size;
+		else
+			writelen = rootfs_ofs + rootfs_info.file_size;
+
+		if (add_jffs2_eof)
+			writelen = pad_jffs2(buf, writelen);
+	}
+
+	if (!strip_padding)
+		writelen = buflen;
+
+	fill_header(buf, writelen);
+	ret = write_fw(buf, writelen);
+	if (ret)
+		goto out_free_buf;
+
+	ret = EXIT_SUCCESS;
+
+ out_free_buf:
+	free(buf);
+ out:
+	return ret;
+}
+
+/* Helper functions to inspect_fw() representing different output formats */
+static inline void inspect_fw_pstr(char *label, char *str)
+{
+	printf("%-23s: %s\n", label, str);
+}
+
+static inline void inspect_fw_phex(char *label, uint32_t val)
+{
+	printf("%-23s: 0x%08x\n", label, val);
+}
+
+static inline void inspect_fw_phexpost(char *label,
+                                       uint32_t val, char *post)
+{
+	printf("%-23s: 0x%08x (%s)\n", label, val, post);
+}
+
+static inline void inspect_fw_phexdef(char *label,
+                                      uint32_t val, uint32_t defval)
+{
+	printf("%-23s: 0x%08x                  ", label, val);
+
+	if (val == defval)
+		printf("(== OpenWrt default)\n");
+	else
+		printf("(OpenWrt default: 0x%08x)\n", defval);
+}
+
+static inline void inspect_fw_phexexp(char *label,
+                                      uint32_t val, uint32_t expval)
+{
+	printf("%-23s: 0x%08x ", label, val);
+
+	if (val == expval)
+		printf("(ok)\n");
+	else
+		printf("(expected: 0x%08x)\n", expval);
+}
+
+static inline void inspect_fw_phexdec(char *label, uint32_t val)
+{
+	printf("%-23s: 0x%08x / %8u bytes\n", label, val, val);
+}
+
+static inline void inspect_fw_phexdecdef(char *label,
+                                         uint32_t val, uint32_t defval)
+{
+	printf("%-23s: 0x%08x / %8u bytes ", label, val, val);
+
+	if (val == defval)
+		printf("(== OpenWrt default)\n");
+	else
+		printf("(OpenWrt default: 0x%08x)\n", defval);
+}
+
+static inline void inspect_fw_pmd5sum(char *label, uint8_t *val, char *text)
+{
+	int i;
+
+	printf("%-23s:", label);
+	for (i=0; i<MD5SUM_LEN; i++)
+		printf(" %02x", val[i]);
+	printf(" %s\n", text);
+}
+
+static int inspect_fw(void)
+{
+	char *buf;
+	struct fw_header *hdr;
+	uint8_t md5sum[MD5SUM_LEN];
+	struct board_info *board;
+	int ret = EXIT_FAILURE;
+
+	buf = malloc(inspect_info.file_size);
+	if (!buf) {
+		ERR("no memory for buffer!\n");
+		goto out;
+	}
+
+	ret = read_to_buf(&inspect_info, buf);
+	if (ret)
+		goto out_free_buf;
+	hdr = (struct fw_header *)buf;
+
+	inspect_fw_pstr("File name", inspect_info.file_name);
+	inspect_fw_phexdec("File size", inspect_info.file_size);
+
+	if (ntohl(hdr->version) != HEADER_VERSION_V2) {
+		ERR("file does not seem to have V2 header!\n");
+		goto out_free_buf;
+	}
+
+	inspect_fw_phexdec("Version 2 Header size", sizeof(struct fw_header));
+
+	if (ntohl(hdr->unk1) != 0)
+		inspect_fw_phexdec("Unknown value 1", hdr->unk1);
+
+	memcpy(md5sum, hdr->md5sum1, sizeof(md5sum));
+	if (ntohl(hdr->boot_len) == 0)
+		memcpy(hdr->md5sum1, md5salt_normal, sizeof(md5sum));
+	else
+		memcpy(hdr->md5sum1, md5salt_boot, sizeof(md5sum));
+	get_md5(buf, inspect_info.file_size, hdr->md5sum1);
+
+	if (memcmp(md5sum, hdr->md5sum1, sizeof(md5sum))) {
+		inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(*ERROR*)");
+		inspect_fw_pmd5sum("          --> expected", hdr->md5sum1, "");
+	} else {
+		inspect_fw_pmd5sum("Header MD5Sum1", md5sum, "(ok)");
+	}
+	if (ntohl(hdr->unk2) != 0)
+		inspect_fw_phexdec("Unknown value 2", hdr->unk2);
+	inspect_fw_pmd5sum("Header MD5Sum2", hdr->md5sum2,
+	                   "(purpose yet unknown, unchecked here)");
+
+	if (ntohl(hdr->unk3) != 0xffffffff)
+		inspect_fw_phexdec("Unknown value 3", hdr->unk3);
+
+	if (ntohs(hdr->unk4) != 0x55aa)
+		inspect_fw_phexdec("Unknown value 4", hdr->unk4);
+
+	if (hdr->unk5 != 0xa5)
+		inspect_fw_phexdec("Unknown value 5", hdr->unk5);
+
+	printf("\n");
+
+	inspect_fw_pstr("Firmware version", hdr->fw_version);
+
+	board = find_board_by_hwid(ntohl(hdr->hw_id));
+	if (board) {
+		layout = find_layout(board->layout_id);
+		inspect_fw_phexpost("Hardware ID",
+		                    ntohl(hdr->hw_id), board->id);
+		inspect_fw_phexexp("Hardware Revision",
+		                   ntohl(hdr->hw_rev), board->hw_rev);
+	} else {
+		inspect_fw_phexpost("Hardware ID",
+		                    ntohl(hdr->hw_id), "unknown");
+		inspect_fw_phex("Hardware Revision",
+		                ntohl(hdr->hw_rev));
+	}
+
+	printf("%-23s: %d.%d.%d-%d.%d\n", "Software version",
+	       hdr->ver_hi, hdr->ver_mid, hdr->ver_lo,
+	       hdr->sver_hi, hdr->sver_lo);
+
+	printf("\n");
+
+	inspect_fw_phexdec("Kernel data offset",
+	                   ntohl(hdr->kernel_ofs));
+	inspect_fw_phexdec("Kernel data length",
+	                   ntohl(hdr->kernel_len));
+	if (board) {
+		inspect_fw_phexdef("Kernel load address",
+		                   ntohl(hdr->kernel_la),
+		                   layout ? layout->kernel_la : 0xffffffff);
+		inspect_fw_phexdef("Kernel entry point",
+		                   ntohl(hdr->kernel_ep),
+		                   layout ? layout->kernel_ep : 0xffffffff);
+		inspect_fw_phexdecdef("Rootfs data offset",
+		                      ntohl(hdr->rootfs_ofs),
+		                      layout ? layout->rootfs_ofs : 0xffffffff);
+	} else {
+		inspect_fw_phex("Kernel load address",
+		                ntohl(hdr->kernel_la));
+		inspect_fw_phex("Kernel entry point",
+		                ntohl(hdr->kernel_ep));
+		inspect_fw_phexdec("Rootfs data offset",
+		                   ntohl(hdr->rootfs_ofs));
+	}
+	inspect_fw_phexdec("Rootfs data length",
+	                   ntohl(hdr->rootfs_len));
+	inspect_fw_phexdec("Boot loader data offset",
+	                   ntohl(hdr->boot_ofs));
+	inspect_fw_phexdec("Boot loader data length",
+	                   ntohl(hdr->boot_len));
+	inspect_fw_phexdec("Total firmware length",
+	                   ntohl(hdr->fw_length));
+
+	if (extract) {
+		FILE *fp;
+		char *filename;
+
+		printf("\n");
+
+		filename = malloc(strlen(inspect_info.file_name) + 8);
+		sprintf(filename, "%s-kernel", inspect_info.file_name);
+		printf("Extracting kernel to \"%s\"...\n", filename);
+		fp = fopen(filename, "w");
+		if (fp)	{
+			if (!fwrite(buf + ntohl(hdr->kernel_ofs),
+			            ntohl(hdr->kernel_len), 1, fp)) {
+				ERR("error in fwrite(): %s", strerror(errno));
+			}
+			fclose(fp);
+		} else {
+			ERR("error in fopen(): %s", strerror(errno));
+		}
+		free(filename);
+
+		filename = malloc(strlen(inspect_info.file_name) + 8);
+		sprintf(filename, "%s-rootfs", inspect_info.file_name);
+		printf("Extracting rootfs to \"%s\"...\n", filename);
+		fp = fopen(filename, "w");
+		if (fp)	{
+			if (!fwrite(buf + ntohl(hdr->rootfs_ofs),
+			            ntohl(hdr->rootfs_len), 1, fp)) {
+				ERR("error in fwrite(): %s", strerror(errno));
+			}
+			fclose(fp);
+		} else {
+			ERR("error in fopen(): %s", strerror(errno));
+		}
+		free(filename);
+	}
+
+ out_free_buf:
+	free(buf);
+ out:
+	return ret;
+}
+
+int main(int argc, char *argv[])
+{
+	int ret = EXIT_FAILURE;
+	int err;
+
+	FILE *outfile;
+
+	progname = basename(argv[0]);
+
+	while ( 1 ) {
+		int c;
+
+		c = getopt(argc, argv, "a:B:H:E:F:L:V:N:W:ci:k:r:R:o:xhsjv:y:");
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'a':
+			sscanf(optarg, "0x%x", &rootfs_align);
+			break;
+		case 'B':
+			board_id = optarg;
+			break;
+		case 'H':
+			opt_hw_id = optarg;
+			break;
+		case 'E':
+			sscanf(optarg, "0x%x", &kernel_ep);
+			break;
+		case 'F':
+			layout_id = optarg;
+			break;
+		case 'W':
+			opt_hw_rev = optarg;
+			break;
+		case 'L':
+			sscanf(optarg, "0x%x", &kernel_la);
+			break;
+		case 'V':
+			version = optarg;
+			break;
+		case 'v':
+			fw_ver = optarg;
+			break;
+		case 'y':
+			sver = optarg;
+			break;
+		case 'N':
+			vendor = optarg;
+			break;
+		case 'c':
+			combined++;
+			break;
+		case 'k':
+			kernel_info.file_name = optarg;
+			break;
+		case 'r':
+			rootfs_info.file_name = optarg;
+			break;
+		case 'R':
+			sscanf(optarg, "0x%x", &rootfs_ofs);
+			break;
+		case 'o':
+			ofname = optarg;
+			break;
+		case 's':
+			strip_padding = 1;
+			break;
+		case 'i':
+			inspect_info.file_name = optarg;
+			break;
+		case 'j':
+			add_jffs2_eof = 1;
+			break;
+		case 'x':
+			extract = 1;
+			break;
+		case 'h':
+			usage(EXIT_SUCCESS);
+			break;
+		default:
+			usage(EXIT_FAILURE);
+			break;
+		}
+	}
+
+	ret = check_options();
+	if (ret)
+		goto out;
+
+	if (!inspect_info.file_name)
+		ret = build_fw();
+	else
+		ret = inspect_fw();
+
+ out:
+	return ret;
+}
+