#include <string.h>
#include <stdlib.h>
#include <sys/types.h>
+#include <unistd.h>
+#include <asm/byteorder.h>
/* #define DEBUG 1 */
-/*
- * Fw Header Layout for Netgear / Sercomm devices
- * */
-static const char *magic = "sErCoMm"; /* 7 */
-/* 7-11: version control/download control ? */
-unsigned char version[4] = {0x00, 0x01, 0x00, 0x00};
-char *hwID = ""; /* 11-43 , ASCII/HEX */
-char *hwVer = ""; /* 44-57 , ASCII/HEX */
-char *swVer = ""; /* 58-62 , ASCII/HEX */
-/* magic again. */
+#ifdef DEBUG
+#define DBG(...) {printf(__VA_ARGS__); }
+#else
+#define DBG(...) {}
+#endif
+#define ERR(...) {printf(__VA_ARGS__); }
+#define ALIGN(a,b) ((a) + ((b) - ((a) % (b))))
+#define ROOTFS_ALIGN 128
#define HEADER_SIZE 71
-/* null bytes until 511 */
-u_int32_t checksum = 0xFF; /* checksum */
-/* 512 onwards -> ZIP containing rootfs with the same Header */
+/*
+ * Fw Header Layout for Netgear / Sercomm devices (bytes)
+ *
+ * Size : 512 bytes + zipped image size
+ *
+ * Locations:
+ * magic : 0-6 ASCII
+ * version: 7-11 fixed
+ * hwID : 11-44 ASCII
+ * hwVer : 45-54 ASCII
+ * swVer : 55-62 uint32_t in BE
+ * magic : 63-69 ASCII
+ * ChkSum : 511 Inverse value of the full image checksum while this location is 0x00
+ */
+
+static const char* magic = "sErCoMm"; /* 7 */
+/* 7-11: version control/download control ? */
+static const unsigned char version[4] = { 0x00, 0x01, 0x00, 0x00 };
-/* appended on rootfs for the Header. */
-const int footer_size = 128;
+
+/* 512 onwards -> ZIP containing rootfs with the same Header */
struct file_info {
- char *file_name; /* name of the file */
- char *file_data; /* data of the file in memory */
- u_int32_t file_size; /* length of the file */
+ char* file_name; /* name of the file */
+ char* file_data; /* data of the file in memory */
+ u_int32_t file_size; /* length of the file */
};
-u_int8_t getCheckSum(char *data, int len)
-{
+static u_int8_t getCheckSum(char* data, int len) {
+ u_int8_t new = 0;
- int32_t previous = 0;
- u_int32_t new = 0;
+ if (!data) {
+ ERR("Invalid pointer provided!\n");
+ return 0;
+ }
- for (u_int32_t i = 0; i < len; i++) {
- new = (data[i] + previous) % 256;
- previous = new | previous & -256;
+ for (int i = 0; i < len; i++) {
+ new += data[i];
}
- return (u_int8_t) new;
+
+ return new;
}
-void *bufferFile(struct file_info *finfo, int dontload)
-{
+static int bufferFile(struct file_info* finfo) {
int fs = 0;
- FILE *f = NULL;
+ FILE* fp = NULL;
-#ifdef DEBUG
- printf("Opening file: %s\n", finfo->file_name);
-#endif
- f = fopen(finfo->file_name, "rb");
- if (f == NULL) {
- perror("Error");
- exit(1);
+ if (!finfo || !finfo->file_name) {
+ ERR("Invalid pointer provided!\n");
+ return -1;
}
- fseek(f, 0L, SEEK_END);
- fs = ftell(f);
- rewind(f);
+ DBG("Opening file: %s\n", finfo->file_name);
-#ifdef DEBUG
- printf("Filesize: %i .\n", fs);
-#endif
+ if (!(fp = fopen(finfo->file_name, "rb"))) {
+ ERR("Error opening file: %s\n", finfo->file_name);
+ return -1;
+ }
- finfo->file_size = fs;
+ /* Get filesize */
+ rewind(fp);
+ fseek(fp, 0L, SEEK_END);
+ fs = ftell(fp);
+ rewind(fp);
- if (dontload) {
- return 0;
+ if (fs < 0) {
+ ERR("Error getting filesize: %s\n", finfo->file_name);
+ fclose(fp);
+ return -1;
}
- char *data = malloc(fs);
- finfo->file_data = data;
+ DBG("Filesize: %i\n", fs);
+ finfo->file_size = fs;
- int read = fread(data, fs, 1, f);
+ if (!(finfo->file_data = malloc(fs))) {
+ ERR("Out of memory!\n");
+ fclose(fp);
+ return -1;
+ }
- if (read != 1) {
- printf("Error reading file %s.", finfo->file_name);
- exit(1);
+ if (fread(finfo->file_data, 1, fs, fp) != fs) {
+ ERR("Error reading file %s\n", finfo->file_name);
+ fclose(fp);
+ return -1;
}
-#ifdef DEBUG
- printf("File: read successfully %i bytes.\n", read*fs);
-#endif
- fclose(f);
+ DBG("File: read successful\n");
+ fclose(fp);
+
+ return 0;
}
-void *writeFile(struct file_info *finfo)
-{
+static int writeFile(struct file_info* finfo) {
+ FILE* fp;
-#ifdef DEBUG
- printf("Writing file: %s.\n", finfo->file_name);
-#endif
+ if (!finfo || !finfo->file_name) {
+ ERR("Invalid pointer provided!\n");
+ return -1;
+ }
+
+ DBG("Opening file: %s\n", finfo->file_name);
+
+ if (!(fp = fopen(finfo->file_name, "w"))) {
+ ERR("Error opening file: %s\n", finfo->file_name);
+ return -1;
+ }
- FILE *fout = fopen(finfo->file_name, "w");
+ DBG("Writing file: %s\n", finfo->file_name);
- if (!fwrite(finfo->file_data, finfo->file_size, 1, fout)) {
- printf("Wanted to write, but something went wrong.\n");
- fclose(fout);
- exit(1);
+ if (fwrite(finfo->file_data, 1, finfo->file_size, fp) != finfo->file_size) {
+ ERR("Wanted to write, but something went wrong!\n");
+ fclose(fp);
+ return -1;
}
- fclose(fout);
+
+ fclose(fp);
+ return 0;
}
-void *rmFile(struct file_info *finfo)
-{
- remove(finfo->file_name);
- free(finfo->file_data);
+static void fi_clean(struct file_info* finfo) {
+ if (!finfo)
+ return;
+
+ if (finfo->file_name) {
+ finfo->file_name = NULL;
+ }
+
+ if (finfo->file_data) {
+ free(finfo->file_data);
+ finfo->file_data = NULL;
+ }
+
finfo->file_size = 0;
}
-void *usage(char *argv[])
-{
- printf("Usage: %s <sysupgradefile> <kernel_offset> <HWID> <HWVER> <SWID>\n"
- "All are positional arguments ... \n"
- " sysupgradefile: File with the kernel uimage at 0\n"
- " kernel_offset: Offset in Hex where the kernel is located\n"
- " HWID: Hardware ID, ASCII\n"
- " HWVER: Hardware Version, ASCII\n"
- " SWID: Software Version, Hex\n"
- " \n"
- " ", argv[0]);
+static void usage(char* argv[]) {
+ printf("Usage: %s <sysupgradefile> <kernel_offset> <HWID> <HWVER> <SWID>\n"
+ "All are positional arguments ... \n"
+ " sysupgradefile: File with the kernel uimage at 0\n"
+ " kernel_offset: Offset where the kernel is located (decimal, hex or octal notation)\n"
+ " HWID: Hardware ID, ASCII\n"
+ " HWVER: Hardware Version, ASCII\n"
+ " SWID: Software Version (decimal, hex or octal notation)\n"
+ " \n"
+ , argv[0]);
}
-int main(int argc, char *argv[])
-{
- printf("Building fw image for sercomm devices.\n");
+int main(int argc, char* argv[]) {
+ int ret = 1;
+ int rootfsname_sz;
+ int zipfsname_sz;
+ int zipcmd_sz;
+ u_int32_t kernel_offset = 0x90000; /* offset for the kernel inside the rootfs, default val */
+ u_int32_t swVer = 0;
+ struct file_info sysupgrade = { 0 };
+ struct file_info header = { 0 };
+ struct file_info rootfs = { 0 };
+ struct file_info zippedfs = { 0 };
+ struct file_info image = { 0 };
+ char* hwID = NULL;
+ char* hwVer = NULL;
+ char* rootfsname = NULL;
+ char* zipfsname = NULL;
+ char* zipcmd = NULL;
+ u_int8_t chkSum;
if (argc == 2) {
- struct file_info myfile = {argv[1], 0, 0};
- bufferFile(&myfile, 0);
- char chksum = getCheckSum(myfile.file_data, myfile.file_size);
- printf("Checksum for File: %X.\n", chksum);
+ struct file_info myfile = { argv[1], 0, 0 };
+
+ if (bufferFile(&myfile))
+ return 1;
+
+ chkSum = getCheckSum(myfile.file_data, myfile.file_size);
+ printf("Checksum for File: 0x%hhX\n", chkSum);
+
return 0;
}
return 1;
}
- /* Args */
+ printf("Building fw image for sercomm devices ..\n");
- struct file_info sysupgrade = {argv[1], 0, 0};
- bufferFile(&sysupgrade, 0);
+ /* process args */
+ hwID = argv[3];
+ hwVer = argv[4];
- int kernel_offset = 0x90000; /* offset for the kernel inside the rootfs, default val */
- sscanf(argv[2], "%X", &kernel_offset);
-#ifdef DEBUG
- printf("Kernel_offset: at %X/%i bytes.\n", kernel_offset, kernel_offset);
-#endif
- char *hwID = argv[3];
- char *hwVer = argv[4];
- u_int32_t swVer = 0;
- sscanf(argv[5],"%4X",&swVer);
- swVer = bswap_32(swVer);
+ sysupgrade.file_name = argv[1];
+ image.file_name = argv[1];
+ kernel_offset = (u_int32_t) strtol(argv[2], NULL, 0);
+ swVer = (u_int32_t) strtol(argv[5], NULL, 0);
+ swVer = __cpu_to_be32(swVer);
- char *rootfsname = malloc(2*strlen(sysupgrade.file_name) + 8);
- sprintf(rootfsname, "%s.rootfs", sysupgrade.file_name);
+ /* Check if files actually exist */
+ if (access(sysupgrade.file_name, (F_OK | R_OK))) {
+ /* Error */
+ ERR("File not found: %s\n", sysupgrade.file_name);
+ goto cleanup;
+ }
- char *zipfsname = malloc(2*strlen(rootfsname) + 5);
- sprintf(zipfsname, "%s.zip", rootfsname);
- /* / Args */
+ /* Calculate amount of required memory (incl. 0-term) */
+ rootfsname_sz = strlen(sysupgrade.file_name) + 7 + 1;
+ zipfsname_sz = strlen(sysupgrade.file_name) + 7 + 4 + 1;
+
+ /* Allocate required memory */
+ if (!(rootfsname = (char*) malloc(rootfsname_sz)) || !(zipfsname =
+ (char*) malloc(zipfsname_sz))) {
+ /* Error */
+ ERR("Out of memory!\n");
+ goto cleanup;
+ }
+
+ /* Create filenames */
+ if (snprintf(rootfsname, rootfsname_sz, "%s.rootfs", sysupgrade.file_name)
+ >= rootfsname_sz
+ || snprintf(zipfsname, zipfsname_sz, "%s.rootfs.zip",
+ sysupgrade.file_name) >= zipfsname_sz) {
+ /* Error */
+ ERR("Buffer too small!\n");
+ goto cleanup;
+ }
+
+ /* Buffer all files */
+ if (bufferFile(&sysupgrade)) {
+ /* Error */
+ goto cleanup;
+ }
+
+ DBG("Building header: %s %s %2X %s\n", hwID, hwVer, swVer, magic);
-#ifdef DEBUG
- printf("Building header: %s %s %2X %s.\n", hwID , hwVer, swVer, magic);
-#endif
/* Construct the firmware header/magic */
- struct file_info header = {0, 0, 0};
+ header.file_name = NULL;
header.file_size = HEADER_SIZE;
- header.file_data = malloc(HEADER_SIZE);
- bzero(header.file_data, header.file_size);
- char *tg = header.file_data;
- strcpy(tg, magic);
- memcpy(tg+7, version, 4*sizeof(char));
- strcpy(tg+11, hwID);
- strcpy(tg+45, hwVer);
- memcpy(tg+55, &swVer,sizeof(u_int32_t));
- strcpy(tg+63, magic);
+ if (!(header.file_data = (char*) calloc(1, HEADER_SIZE))) {
+ /* Error */
+ ERR("Out of memory!\n");
+ goto cleanup;
+ }
+
+ strncpy(header.file_data + 0, magic, 7);
+ memcpy(header.file_data + 7, version, sizeof(version));
+ strncpy(header.file_data + 11, hwID, 34);
+ strncpy(header.file_data + 45, hwVer, 10);
+ memcpy(header.file_data + 55, &swVer, sizeof(swVer));
+ strncpy(header.file_data + 63, magic, 7);
+
+ DBG("Creating rootfs ..\n");
-#ifdef DEBUG
- printf("Header done, now creating rootfs.");
-#endif
/* Construct a rootfs */
- struct file_info rootfs = {0, 0, 0};
- rootfs.file_size = sysupgrade.file_size + kernel_offset + footer_size;
- rootfs.file_data = malloc(rootfs.file_size);
- bzero(rootfs.file_data, rootfs.file_size);
rootfs.file_name = rootfsname;
+ rootfs.file_size = ALIGN(
+ sysupgrade.file_size + kernel_offset + header.file_size,
+ ROOTFS_ALIGN);
+
+ if (!(rootfs.file_data = calloc(1, rootfs.file_size))) {
+ /* Error */
+ ERR("Out of memory!\n");
+ goto cleanup;
+ }
- /* copy Owrt image to Kernel location */
- memcpy(rootfs.file_data+kernel_offset, sysupgrade.file_data, sysupgrade.file_size);
+ /* copy Owrt image to kernel location */
+ memcpy(rootfs.file_data + kernel_offset, sysupgrade.file_data,
+ sysupgrade.file_size);
- /* 22 added to get away from sysup image, no other reason.
- * updater searches for magic anyway */
- tg = rootfs.file_data + kernel_offset + sysupgrade.file_size+22;
+ /* Append header after the owrt image. The updater searches for it */
+ memcpy(rootfs.file_data + kernel_offset + sysupgrade.file_size,
+ header.file_data, header.file_size);
- memcpy(tg, header.file_data, header.file_size);
- writeFile(&rootfs);
+ /* Write to file */
+ if (writeFile(&rootfs)) {
+ /* Error */
+ goto cleanup;
+ }
+
+ /* Construct a zip */
+ DBG("Preparing to zip ..\n");
-#ifdef DEBUG
- printf("Preparing to zip.\n");
-#endif
/* now that we got the rootfs, repeat the whole thing again(sorta):
* 1. zip the rootfs */
- char *zipper = malloc(5 + 2*strlen(rootfs.file_name) + 6);
- sprintf(zipper, "%s %s %s", "zip ", zipfsname, rootfs.file_name);
- int ret = system(zipper);
+ zipcmd_sz = 3 + 1 + strlen(zipfsname) + 1 + strlen(rootfs.file_name) + 1;
+
+ if (!(zipcmd = malloc(zipcmd_sz))) {
+ /* Error */
+ ERR("Out of memory!\n");
+ goto cleanup;
+ }
- /* clear rootfs file */
- rmFile(&rootfs);
+ if (snprintf(zipcmd, zipcmd_sz, "%s %s %s", "zip", zipfsname,
+ rootfs.file_name) >= zipcmd_sz) {
+ /* Error */
+ ERR("Buffer too small!\n");
+ goto cleanup;
+ }
+
+ if (system(zipcmd)) {
+ /* Error */
+ ERR("Error creating a zip file!\n");
+ goto cleanup;
+ }
/* and load zipped fs */
- struct file_info zippedfs = {zipfsname, 0, 0};
- bufferFile(&zippedfs, 0);
+ zippedfs.file_name = zipfsname;
-#ifdef DEBUG
- printf("Creating Image.\n");
-#endif
+ if (bufferFile(&zippedfs)) {
+ /* Error */
+ goto cleanup;
+ }
- /* 2. create new file 512+rootfs size */
- struct file_info image = {argv[1], 0, 0};
- image.file_data = malloc(zippedfs.file_size + 512);
- image.file_size = zippedfs.file_size + 512;
+ DBG("Creating Image.\n");
- /* 3. copy zipfile at loc 512 */
- memcpy(image.file_data+512, zippedfs.file_data, zippedfs.file_size);
- rmFile(&zippedfs);
+ /* 2. create new file 512 + rootfs size */
+ image.file_size = zippedfs.file_size + 512;
+ if (!(image.file_data = malloc(zippedfs.file_size + 512))) {
+ /* Error */
+ ERR("Out of memory!\n");
+ goto cleanup;
+ }
- /* 4. add header to file */
+ /* 3. add header to file */
memcpy(image.file_data, header.file_data, header.file_size);
- /* 5. do a checksum run, and compute checksum */
- char chksum = getCheckSum(image.file_data, image.file_size);
-#ifdef DEBUG
- printf("Checksum for Image: %X.\n", chksum);
-#endif
+ /* 4. clear remaining space */
+ if (header.file_size < 512)
+ memset(image.file_data + header.file_size, 0, 512 - header.file_size);
- /* 6. write the checksum invert into byte 511 to bring it to 0 */
- chksum = (chksum ^ 0xFF) + 1;
- memcpy(image.file_data+511, &chksum, 1);
+ /* 5. copy zipfile at loc 512 */
+ memcpy(image.file_data + 512, zippedfs.file_data, zippedfs.file_size);
- chksum = getCheckSum(image.file_data, image.file_size);
-#ifdef DEBUG
- printf("Checksum for after fix: %X.\n", chksum);
-#endif
- /* 7. pray that the updater will accept the file */
- writeFile(&image);
- return 0;
+ /* 6. do a checksum run, and compute checksum */
+ chkSum = getCheckSum(image.file_data, image.file_size);
+
+ DBG("Checksum for Image: %hhX\n", chkSum);
+
+ /* 7. write the checksum inverted into byte 511 to bring it to 0 on verification */
+ chkSum = (chkSum ^ 0xFF) + 1;
+ image.file_data[511] = (char) chkSum;
+
+ chkSum = getCheckSum(image.file_data, image.file_size);
+ DBG("Checksum for after fix: %hhX\n", chkSum);
+
+ if (chkSum != 0) {
+ ERR("Invalid checksum!\n")
+ goto cleanup;
+ }
+
+ /* 8. pray that the updater will accept the file */
+ if (writeFile(&image)) {
+ /* Error */
+ goto cleanup;
+ }
+
+ /* All seems OK */
+ ret = 0;
+
+ cleanup:
+
+ if (rootfs.file_name && !access(rootfs.file_name, F_OK | W_OK))
+ remove(rootfs.file_name);
+
+ if (zippedfs.file_name && !access(zippedfs.file_name, F_OK | W_OK))
+ remove(zippedfs.file_name);
+
+ fi_clean(&sysupgrade);
+ fi_clean(&header);
+ fi_clean(&rootfs);
+ fi_clean(&zippedfs);
+ fi_clean(&image);
+
+ if (rootfsname)
+ free(rootfsname);
+
+ if (zipfsname)
+ free(zipfsname);
+
+ if (zipcmd)
+ free(zipcmd);
+
+ return ret;
}
projects / openwrt / openwrt.git / blobdiff