diff options
Diffstat (limited to 'tools/firmware-utils/src/wrt400n.c')
| -rw-r--r-- | tools/firmware-utils/src/wrt400n.c | 463 |
1 files changed, 197 insertions, 266 deletions
diff --git a/tools/firmware-utils/src/wrt400n.c b/tools/firmware-utils/src/wrt400n.c index 1cf1debc89..70d4c3219a 100644 --- a/tools/firmware-utils/src/wrt400n.c +++ b/tools/firmware-utils/src/wrt400n.c @@ -6,110 +6,34 @@ * from a kernel image file and root fs file * * Author: Sandeep Mistry + * Author: Yousong Zhou + * - remove size limit on kernel and rootfs part */ #include <arpa/inet.h> #include <fcntl.h> #include <stdio.h> #include <stdint.h> +#include <stdbool.h> #include <string.h> +#include <errno.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include "cyg_crc.h" -// https://dev.openwrt.org/browser/trunk/target/linux/rdc-2.6/files/drivers/mtd/maps/rdc3210.c -static uint32_t crctab[257] = -{ - 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, - 0 -}; - -static uint32_t crc32(uint8_t* buf, uint32_t len) -{ - register int i; - uint32_t sum; - register uint32_t s0; - s0 = ~0; - for (i = 0; i < len; i++) - { - s0 = (s0 >> 8) ^ crctab[(uint8_t) (s0 & 0xFF) ^ buf[i]]; - } - sum = ~s0; - return sum; -} - -#define HEADERSIZE 60 -#define MAGIC "GMTKRT400N" - -// global variables -uint8_t kernelbuf[0x100000]; // kernel - lzma - uImage -uint8_t rootfsbuf[0x2FFFC4]; // root - squashfs - -uint8_t buf[0x400000]; // buffer for image +// Prelimiary test shows that the OEM upgrade program only checks checksum of +// the whole firmware image, ignoring specific checksums of kernel and rootfs +// part. But we are computing crc32 sums of fixed length of data here in lieu +// of read_fw utility found in OEM SDK +#define CRC_SZ_KERNEL 0x100000 +#define CRC_SZ_ROOTFS 0x2fffc4 +// OEM firmware has size limit on "linux" and "rootfs" partition. That's also +// the limit for factory firmware images as fwupgrade utility in the OEM system +// needs to write kernel and rootfs to those two partitions (/dev/mtd2 and +// /dev/mtd3 to be exact) +#define SZ_MAX_KERNEL (0x180000 - 0x40000) +#define SZ_MAX_ROOTFS (0x7b0000 - 0x18000) // Header format: @@ -117,27 +41,6 @@ uint8_t buf[0x400000]; // buffer for image // GPL Tarball: http://downloads.linksysbycisco.com/downloads/WRT400N_1.0.01.19_US.tar,0.gz // File: WRT400N_1.0.01.19_US/FW_WRT400N_1.0.01.19_US_20081229/GTK/user/include/fw_upgrade.h // -// -// Struct: -// typedef struct -// { -// UINT32 checksum; /* CRC32 */ -// UINT8 magic[11]; /* The value of GTIMG_MAGIC */ -// UINT32 kernel_length; /* The length of the kernel image */ -// //UINT32 kernel_entry_point; /* Kernel's entry point for RedBoot's information */ -// UINT32 kernel_upgrade_flag; /* Set to 1 if we need to upgrade the kernel parition of the Flash */ -// UINT32 rootfs_length; /* The length of the rootfs image */ -// //UINT32 rootfs_entry_point; /* Not in use */ -// UINT32 rootfs_upgrade_flag; /* Set to 1 if we need to upgrade the rootfs parition of the Flash */ -// -// // Add 3 items by Vic Yu, 2006-05/10 -// UINT32 kernel_checksum; -// UINT32 rootfs_checksum; -// UINT32 fw_totalsize; -// UINT32 reserved[4]; -// }imghdr_t , *pLinuxFWHeader_T; -// -// // Description // - checksum: CRC32 of kernel and root fs, back to back // - magic: GMTKRT400N @@ -151,186 +54,214 @@ uint8_t buf[0x400000]; // buffer for image // set to 0xFF upto 0x2FFFC4 bytes (total length) // - fw_totalsize: total firmware image file length (header length + kernel length + root fs length) // - reserved[4]: reserved ??? - set to all 0xFF +struct imghdr_t +{ + uint32_t checksum; /* CRC32 */ + uint8_t magic[12]; /* The value of GTIMG_MAGIC */ + uint32_t kernel_length; /* The length of the kernel image */ + //uint32_t kernel_entry_point; /* Kernel's entry point for RedBoot's information */ + uint32_t kernel_upgrade_flag; /* Set to 1 if we need to upgrade the kernel parition of the Flash */ + uint32_t rootfs_length; /* The length of the rootfs image */ + //uint32_t rootfs_entry_point; /* Not in use */ + uint32_t rootfs_upgrade_flag; /* Set to 1 if we need to upgrade the rootfs parition of the Flash */ + + // Add 3 items by Vic Yu, 2006-05/10 + uint32_t kernel_checksum; + uint32_t rootfs_checksum; + uint32_t fw_totalsize; + uint32_t reserved[4]; +}; +struct file_info { + char *filename; + int filesize; + int fd; + uint32_t crc32sum; + int crc_sz; +}; - -int main(int argc, char *argv[]) +int get_file_info(struct file_info *fi, uint32_t *crc32_acc) { - // file descriptors ... - int kernelfd = -1; - int rootfsfd = -1; - int outfd = -1; + int fd; + int filesize = 0; + uint32_t crc32sum = 0; + uint32_t _crc32_acc; + int crc_rem = fi->crc_sz; + int sz; + char buf[1024]; + + if (crc32_acc) + _crc32_acc = *crc32_acc; + else + _crc32_acc = 0; + + fd = open(fi->filename, O_RDONLY); + if(fd < 0) { + fprintf(stderr, "error: opening '%s'\n", fi->filename); + return -1; + } + while (true) { + sz = read(fd, buf, sizeof(buf)); + if (sz > 0) { + if (crc32_acc) + _crc32_acc = cyg_crc32_accumulate(_crc32_acc, buf, sz); + if (crc_rem > 0) { + if (crc_rem < sz) { + crc32sum = cyg_crc32_accumulate(crc32sum, buf, crc_rem); + crc_rem = 0; + } else { + crc32sum = cyg_crc32_accumulate(crc32sum, buf, sz); + crc_rem -= sz; + } + } + filesize += sz; + } else if (sz == 0) { + break; + } else { + fprintf(stderr, "error read '%s'", strerror(errno)); + return -1; + } + } - char* kernelfilename = NULL; - char* rootfsfilename = NULL; - char* outputfilename = NULL; + if (crc_rem) { + memset(buf, 0xff, sizeof(buf)); + while (crc_rem > 0) { + if (crc_rem > sizeof(buf)) { + crc32sum = cyg_crc32_accumulate(crc32sum, buf, sizeof(buf)); + crc_rem -= sizeof(buf); + } else { + crc32sum = cyg_crc32_accumulate(crc32sum, buf, crc_rem); + crc_rem = 0; + break; + } + } + } - // file sizes - uint32_t kernelsize = 0; - uint32_t rootfssize = 0; - uint32_t totalsize = 0; + fi->fd = fd; + fi->filesize = filesize; + fi->crc32sum = crc32sum; + if (crc32_acc) + *crc32_acc = _crc32_acc; + return 0; +} - // header flags - uint32_t kernelflag = 0; - uint32_t rootfsflag = 0; +int copy_file(int fromfd, int tofd) +{ + int szr, szw; + int buf[4096]; - // checksums - uint32_t kernelchecksum = 0; - uint32_t rootfschecksum = 0; - uint32_t crc = 0; + if (lseek(fromfd, SEEK_SET, 0) < 0) { + fprintf(stderr, "lseek: %s\n", strerror(errno)); + return -1; + } + while (true) { + szr = read(fromfd, buf, sizeof(buf)); + if (szr > 0) { + szw = write(tofd, buf, szr); + if (szw != szr) { + fprintf(stderr, "copy_file: error writing %d bytes: %s\n", szr, strerror(errno)); + return -1; + } + } else if (szr == 0) { + break; + } else { + fprintf(stderr, "copy_file: error reading: %s\n", strerror(errno)); + return -1; + } + } + return 0; +} - if(argc != 4) - { +int main(int argc, char *argv[]) +{ + struct file_info kernel_fi; + struct file_info rootfs_fi; + struct file_info output_fi; + struct imghdr_t ih; + int fd, sz; + int ret = -1; + + if(argc != 4) { printf("Usage:\n\t%s <kernel file> <rootfs file> <output file>\n", argv[0]); return 1; } - kernelfilename = argv[1]; - rootfsfilename = argv[2]; - outputfilename = argv[3]; + kernel_fi.crc_sz = CRC_SZ_KERNEL; + rootfs_fi.crc_sz = CRC_SZ_ROOTFS; - // Fill the kernel, rootfs, main buffer - memset(kernelbuf, 0xFF, sizeof(kernelbuf)); - memset(rootfsbuf, 0xFF, sizeof(rootfsbuf)); - memset(buf, 0xFF, sizeof(buf)); + kernel_fi.fd = -1; + rootfs_fi.fd = -1; + output_fi.fd = -1; - // open the kernel .. - kernelfd = open(kernelfilename, O_RDONLY); + kernel_fi.filename = argv[1]; + rootfs_fi.filename = argv[2]; + output_fi.filename = argv[3]; - if(kernelfd == -1) - { - printf("Error: opening '%s'\n", kernelfilename); - goto done; - } - - // read in the kernel ... - kernelsize = read(kernelfd, kernelbuf, sizeof(kernelbuf)); + kernel_fi.crc32sum = 0; + rootfs_fi.crc32sum = 0; + output_fi.crc32sum = 0xffffffff; - if(kernelsize == -1) - { - printf("Error: reading '%s'\n", kernelfilename); + if (get_file_info(&kernel_fi, &output_fi.crc32sum) < 0) goto done; - } - - // calculate the kernel checksum ... - kernelchecksum = cyg_crc32_accumulate(0, kernelbuf, sizeof(kernelbuf)); + if (get_file_info(&rootfs_fi, &output_fi.crc32sum) < 0) + goto done; + output_fi.crc32sum = ~output_fi.crc32sum; // print out stats - printf("%s: size %d (0x%x), crc32 = 0x%x\n", kernelfilename, kernelsize, kernelsize, kernelchecksum); - - - // open the root fs .. - rootfsfd = open(rootfsfilename, O_RDONLY); - - if(rootfsfd == -1) - { - printf("Error: opening '%s'\n", rootfsfilename); + fprintf(stderr, "%s: size %d (0x%x), crc32 = 0x%x\n", + kernel_fi.filename, kernel_fi.filesize, kernel_fi.filesize, kernel_fi.crc32sum); + fprintf(stderr, "%s: size %d (0x%x), crc32 = 0x%x\n", + rootfs_fi.filename, rootfs_fi.filesize, rootfs_fi.filesize, rootfs_fi.crc32sum); + if (kernel_fi.filesize > SZ_MAX_KERNEL) { + fprintf(stderr, "%s: filesize exceeds 0x%x limit\n", SZ_MAX_KERNEL); goto done; } - - // read in the root fs .. - rootfssize = read(rootfsfd, rootfsbuf, sizeof(rootfsbuf)); - - if(rootfssize == -1) - { - printf("Error: reading '%s'\n", rootfsfilename); + if (rootfs_fi.filesize > SZ_MAX_ROOTFS) { + fprintf(stderr, "%s: filesize exceeds 0x%x limit\n", SZ_MAX_ROOTFS); goto done; } - // calculate the root fs checksum ... - rootfschecksum = cyg_crc32_accumulate(0, rootfsbuf, sizeof(rootfsbuf)); - - // print out stats - printf("%s: size %d (0x%x), crc32 = 0x%x\n", rootfsfilename, rootfssize, rootfssize, rootfschecksum); - - // now for the header ... - - totalsize = HEADERSIZE; - - // copy over kernel - memcpy(buf + totalsize, kernelbuf, kernelsize); - totalsize += kernelsize; - - // copy over root fs - memcpy(buf + totalsize, rootfsbuf, rootfssize); - totalsize += rootfssize; - - // calculate crc - crc = crc32(buf + HEADERSIZE, totalsize - HEADERSIZE); - - // print some stats out - printf("crc = 0x%x, total size = %d (0x%x)\n", crc, totalsize, totalsize); - - // copy crc into header - crc = htonl(crc); - memcpy(buf, &crc, sizeof(crc)); - - // copy over magic - strcpy((char *)buf + 4, MAGIC); - - // copy over kernel size - kernelsize = htonl(kernelsize); - memcpy(buf + 16, &kernelsize, sizeof(kernelsize)); - - // copy over kernal flag - kernelflag = htonl(0x1); - memcpy(buf + 20, &kernelflag, sizeof(kernelflag)); - - // copy over root fs size - rootfssize = htonl(rootfssize); - memcpy(buf + 24, &rootfssize, sizeof(rootfssize)); - - // copy over root fs flag - rootfsflag = htonl(0x1); - memcpy(buf + 28, &rootfsflag, sizeof(rootfsflag)); - - // copy over kernel check sum - kernelchecksum = htonl(kernelchecksum); - memcpy(buf + 32, &kernelchecksum, sizeof(kernelchecksum)); - - // copy over root fs checksum - rootfschecksum = htonl(rootfschecksum); - memcpy(buf + 36, &rootfschecksum, sizeof(rootfschecksum)); - - // copy over total size - totalsize = htonl(totalsize); - memcpy(buf + 40, &totalsize, sizeof(totalsize)); - - // undo the htonl (for write) - totalsize = htonl(totalsize); - - - // write out the file from the buffer - outfd = open(outputfilename, O_CREAT | O_WRONLY | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); - - if(outfd == -1) - { - printf("ERROR: opening '%s' for write\n", outputfilename); - } - - write(outfd, buf, totalsize); - -done: - // close open fd's - - if(kernelfd != -1) - { - close(kernelfd); - kernelfd = -1; + memset(&ih, 0xff, sizeof(ih)); + strcpy(ih.magic, "GMTKRT400N"); + ih.checksum = htonl(output_fi.crc32sum); + ih.kernel_length = htonl(kernel_fi.filesize); + ih.rootfs_length = htonl(rootfs_fi.filesize); + ih.kernel_upgrade_flag = htonl(0x1); + ih.rootfs_upgrade_flag = htonl(0x1); + ih.kernel_checksum = htonl(kernel_fi.crc32sum); + ih.rootfs_checksum = htonl(rootfs_fi.crc32sum); + ih.fw_totalsize = htonl(kernel_fi.filesize + rootfs_fi.filesize + sizeof(ih)); + + output_fi.fd = open(output_fi.filename, O_WRONLY | O_CREAT | O_TRUNC, + S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); + sz = write(output_fi.fd, &ih, sizeof(ih)); + if (sz != sizeof(ih)) { + fprintf(stderr, "error writing imghdr to output: %s\n", strerror(errno)); + goto done; } - - if(rootfsfd != -1) - { - close(rootfsfd); - rootfsfd = -1; + if (copy_file(kernel_fi.fd, output_fi.fd)) { + fprintf(stderr, "error copying %s to %s\n", kernel_fi.filename, output_fi.filename); + goto done; } - - if(outfd != -1) - { - close(outfd); - outfd = -1; + if (copy_file(rootfs_fi.fd, output_fi.fd)) { + fprintf(stderr, "error copying %s to %s\n", rootfs_fi.filename, output_fi.filename); + goto done; } + // print some stats out + fprintf(stderr, "crc = 0x%x, total size = %d (0x%x)\n", + output_fi.crc32sum, ntohl(ih.fw_totalsize), ntohl(ih.fw_totalsize)); + ret = 0; - return 0; +done: +#define CLOSE_FI_FD(fi) do { \ + if ((fi).fd >= 0) { \ + close((fi).fd); \ + } \ +} while (0) + + CLOSE_FI_FD(kernel_fi); + CLOSE_FI_FD(rootfs_fi); + CLOSE_FI_FD(output_fi); + return ret; } |