// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2021 Rafał Miłecki */ #include #include #include #include #include #include #include #include #include #include #if !defined(__BYTE_ORDER) #error "Unknown byte order" #endif #if __BYTE_ORDER == __BIG_ENDIAN #define cpu_to_le32(x) bswap_32(x) #define le32_to_cpu(x) bswap_32(x) #define cpu_to_be32(x) (x) #define be32_to_cpu(x) (x) #define cpu_to_le16(x) bswap_16(x) #define le16_to_cpu(x) bswap_16(x) #define cpu_to_be16(x) (x) #define be16_to_cpu(x) (x) #elif __BYTE_ORDER == __LITTLE_ENDIAN #define cpu_to_le32(x) (x) #define le32_to_cpu(x) (x) #define cpu_to_be32(x) bswap_32(x) #define be32_to_cpu(x) bswap_32(x) #define cpu_to_le16(x) (x) #define le16_to_cpu(x) (x) #define cpu_to_be16(x) bswap_16(x) #define be16_to_cpu(x) bswap_16(x) #else #error "Unsupported endianness" #endif #define WFI_VERSION 0x00005732 #define WFI_VERSION_NAND_1MB_DATA 0x00005731 #define WFI_NOR_FLASH 1 #define WFI_NAND16_FLASH 2 #define WFI_NAND128_FLASH 3 #define WFI_NAND256_FLASH 4 #define WFI_NAND512_FLASH 5 #define WFI_NAND1024_FLASH 6 #define WFI_NAND2048_FLASH 7 #define WFI_FLAG_HAS_PMC 0x1 #define WFI_FLAG_SUPPORTS_BTRM 0x2 static int debug; struct bcm4908img_tail { uint32_t crc32; uint32_t version; uint32_t chip_id; uint32_t flash_type; uint32_t flags; }; /** * struct bcm4908img_info - info about BCM4908 image * * Standard BCM4908 image consists of: * 1. (Optional) vedor header * 2. (Optional) cferom * 3. bootfs ─┐ * 4. padding ├─ firmware * 5. rootfs ─┘ * 6. BCM4908 tail */ struct bcm4908img_info { size_t file_size; size_t cferom_offset; size_t bootfs_offset; uint32_t crc32; /* Calculated checksum */ struct bcm4908img_tail tail; }; char *pathname; static inline size_t bcm4908img_min(size_t x, size_t y) { return x < y ? x : y; } /************************************************** * CRC32 **************************************************/ static const uint32_t crc32_tbl[] = { 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, }; uint32_t bcm4908img_crc32(uint32_t crc, const void *buf, size_t len) { const uint8_t *in = buf; while (len) { crc = crc32_tbl[(crc ^ *in) & 0xff] ^ (crc >> 8); in++; len--; } return crc; } /************************************************** * Helpers **************************************************/ static FILE *bcm4908img_open(const char *pathname, const char *mode) { struct stat st; if (pathname) return fopen(pathname, mode); if (isatty(fileno(stdin))) { fprintf(stderr, "Reading from TTY stdin is unsupported\n"); return NULL; } if (fstat(fileno(stdin), &st)) { fprintf(stderr, "Failed to fstat stdin: %d\n", -errno); return NULL; } if (S_ISFIFO(st.st_mode)) { fprintf(stderr, "Reading from pipe stdin is unsupported\n"); return NULL; } return stdin; } static void bcm4908img_close(FILE *fp) { if (fp != stdin) fclose(fp); } static int bcm4908img_calc_crc32(FILE *fp, struct bcm4908img_info *info) { uint8_t buf[1024]; size_t length; size_t bytes; /* Start with cferom (or bootfs) - skip vendor header */ fseek(fp, info->cferom_offset, SEEK_SET); info->crc32 = 0xffffffff; length = info->file_size - info->cferom_offset - sizeof(struct bcm4908img_tail); while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { info->crc32 = bcm4908img_crc32(info->crc32, buf, bytes); length -= bytes; } if (length) { fprintf(stderr, "Failed to read last %zd B of data\n", length); return -EIO; } return 0; } /************************************************** * Existing firmware parser **************************************************/ struct chk_header { uint32_t magic; uint32_t header_len; uint8_t reserved[8]; uint32_t kernel_chksum; uint32_t rootfs_chksum; uint32_t kernel_len; uint32_t rootfs_len; uint32_t image_chksum; uint32_t header_chksum; char board_id[0]; }; static int bcm4908img_parse(FILE *fp, struct bcm4908img_info *info) { struct bcm4908img_tail *tail = &info->tail; struct chk_header *chk; struct stat st; uint8_t buf[1024]; uint16_t tmp16; size_t length; size_t bytes; int err = 0; memset(info, 0, sizeof(*info)); /* File size */ if (fstat(fileno(fp), &st)) { err = -errno; fprintf(stderr, "Failed to fstat: %d\n", err); return err; } info->file_size = st.st_size; /* Vendor formats */ rewind(fp); if (fread(buf, 1, sizeof(buf), fp) != sizeof(buf)) { fprintf(stderr, "Failed to read file header\n"); return -EIO; } chk = (void *)buf; if (be32_to_cpu(chk->magic) == 0x2a23245e) info->cferom_offset = be32_to_cpu(chk->header_len); /* Offsets */ for (info->bootfs_offset = info->cferom_offset; info->bootfs_offset < info->file_size; info->bootfs_offset += 0x20000) { if (fseek(fp, info->bootfs_offset, SEEK_SET)) { err = -errno; fprintf(stderr, "Failed to fseek to the 0x%zx\n", info->bootfs_offset); return err; } if (fread(&tmp16, 1, sizeof(tmp16), fp) != sizeof(tmp16)) { fprintf(stderr, "Failed to read while looking for JFFS2\n"); return -EIO; } if (be16_to_cpu(tmp16) == 0x8519) break; } if (info->bootfs_offset >= info->file_size) { fprintf(stderr, "Failed to find bootfs offset\n"); return -EPROTO; } /* CRC32 */ /* Start with cferom (or bootfs) - skip vendor header */ fseek(fp, info->cferom_offset, SEEK_SET); info->crc32 = 0xffffffff; length = info->file_size - info->cferom_offset - sizeof(*tail); while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { info->crc32 = bcm4908img_crc32(info->crc32, buf, bytes); length -= bytes; } if (length) { fprintf(stderr, "Failed to read last %zd B of data\n", length); return -EIO; } /* Tail */ if (fread(tail, 1, sizeof(*tail), fp) != sizeof(*tail)) { fprintf(stderr, "Failed to read BCM4908 image tail\n"); return -EIO; } /* Standard validation */ if (info->crc32 != le32_to_cpu(tail->crc32)) { fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", info->crc32, le32_to_cpu(tail->crc32)); return -EPROTO; } return 0; } /************************************************** * Info **************************************************/ static int bcm4908img_info(int argc, char **argv) { struct bcm4908img_info info; const char *pathname = NULL; FILE *fp; int c; int err = 0; while ((c = getopt(argc, argv, "i:")) != -1) { switch (c) { case 'i': pathname = optarg; break; } } fp = bcm4908img_open(pathname, "r"); if (!fp) { fprintf(stderr, "Failed to open BCM4908 image\n"); err = -EACCES; goto out; } err = bcm4908img_parse(fp, &info); if (err) { fprintf(stderr, "Failed to parse BCM4908 image\n"); goto err_close; } if (info.bootfs_offset != info.cferom_offset) printf("cferom offset:\t%zu\n", info.cferom_offset); printf("bootfs offset:\t0x%zx\n", info.bootfs_offset); printf("Checksum:\t0x%08x\n", info.crc32); err_close: bcm4908img_close(fp); out: return err; } /************************************************** * Create **************************************************/ static ssize_t bcm4908img_create_append_file(FILE *trx, const char *in_path, uint32_t *crc32) { FILE *in; size_t bytes; ssize_t length = 0; uint8_t buf[1024]; in = fopen(in_path, "r"); if (!in) { fprintf(stderr, "Failed to open %s\n", in_path); return -EACCES; } while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) { if (fwrite(buf, 1, bytes, trx) != bytes) { fprintf(stderr, "Failed to write %zu B to %s\n", bytes, pathname); length = -EIO; break; } *crc32 = bcm4908img_crc32(*crc32, buf, bytes); length += bytes; } fclose(in); return length; } static ssize_t bcm4908img_create_append_zeros(FILE *trx, size_t length) { uint8_t *buf; buf = malloc(length); if (!buf) return -ENOMEM; memset(buf, 0, length); if (fwrite(buf, 1, length, trx) != length) { fprintf(stderr, "Failed to write %zu B to %s\n", length, pathname); free(buf); return -EIO; } free(buf); return length; } static ssize_t bcm4908img_create_align(FILE *trx, size_t cur_offset, size_t alignment) { if (cur_offset & (alignment - 1)) { size_t length = alignment - (cur_offset % alignment); return bcm4908img_create_append_zeros(trx, length); } return 0; } static int bcm4908img_create(int argc, char **argv) { struct bcm4908img_tail tail = { .version = cpu_to_le32(WFI_VERSION), .chip_id = cpu_to_le32(0x4908), .flash_type = cpu_to_le32(WFI_NAND128_FLASH), .flags = cpu_to_le32(WFI_FLAG_SUPPORTS_BTRM), }; uint32_t crc32 = 0xffffffff; size_t cur_offset = 0; ssize_t bytes; FILE *fp; int c; int err = 0; if (argc < 3) { fprintf(stderr, "No BCM4908 image pathname passed\n"); err = -EINVAL; goto out; } pathname = argv[2]; fp = fopen(pathname, "w+"); if (!fp) { fprintf(stderr, "Failed to open %s\n", pathname); err = -EACCES; goto out; } optind = 3; while ((c = getopt(argc, argv, "f:a:A:")) != -1) { switch (c) { case 'f': bytes = bcm4908img_create_append_file(fp, optarg, &crc32); if (bytes < 0) { fprintf(stderr, "Failed to append file %s\n", optarg); } else { cur_offset += bytes; } break; case 'a': bytes = bcm4908img_create_align(fp, cur_offset, strtol(optarg, NULL, 0)); if (bytes < 0) fprintf(stderr, "Failed to append zeros\n"); else cur_offset += bytes; break; case 'A': bytes = strtol(optarg, NULL, 0) - cur_offset; if (bytes < 0) { fprintf(stderr, "Current BCM4908 image length is 0x%zx, can't pad it with zeros to 0x%lx\n", cur_offset, strtol(optarg, NULL, 0)); } else { bytes = bcm4908img_create_append_zeros(fp, bytes); if (bytes < 0) fprintf(stderr, "Failed to append zeros\n"); else cur_offset += bytes; } break; } if (err) goto err_close; } tail.crc32 = cpu_to_le32(crc32); bytes = fwrite(&tail, 1, sizeof(tail), fp); if (bytes != sizeof(tail)) { fprintf(stderr, "Failed to write BCM4908 image tail to %s\n", pathname); return -EIO; } err_close: fclose(fp); out: return err; } /************************************************** * Extract **************************************************/ static int bcm4908img_extract(int argc, char **argv) { struct bcm4908img_info info; const char *pathname = NULL; uint8_t buf[1024]; const char *type; size_t offset; size_t length; size_t bytes; FILE *fp; int c; int err = 0; while ((c = getopt(argc, argv, "i:t:")) != -1) { switch (c) { case 'i': pathname = optarg; break; case 't': type = optarg; break; } } fp = bcm4908img_open(pathname, "r"); if (!fp) { fprintf(stderr, "Failed to open BCM4908 image\n"); err = -EACCES; goto err_out; } err = bcm4908img_parse(fp, &info); if (err) { fprintf(stderr, "Failed to parse BCM4908 image\n"); goto err_close; } if (!strcmp(type, "cferom")) { offset = 0; length = info.bootfs_offset - offset; if (!length) { err = -ENOENT; fprintf(stderr, "This BCM4908 image doesn't contain cferom\n"); goto err_close; } } else if (!strcmp(type, "firmware")) { offset = info.bootfs_offset; length = info.file_size - offset - sizeof(struct bcm4908img_tail); } else { err = -EINVAL; fprintf(stderr, "Unsupported extract type: %s\n", type); goto err_close; } if (!length) { err = -EINVAL; fprintf(stderr, "No data to extract specified\n"); goto err_close; } fseek(fp, offset, SEEK_SET); while (length && (bytes = fread(buf, 1, bcm4908img_min(sizeof(buf), length), fp)) > 0) { fwrite(buf, bytes, 1, stdout); length -= bytes; } if (length) { err = -EIO; fprintf(stderr, "Failed to read last %zd B of data\n", length); goto err_close; } err_close: bcm4908img_close(fp); err_out: return err; } /************************************************** * bootfs **************************************************/ #define JFFS2_MAGIC_BITMASK 0x1985 #define JFFS2_COMPR_NONE 0x00 #define JFFS2_COMPR_ZERO 0x01 #define JFFS2_COMPR_RTIME 0x02 #define JFFS2_COMPR_RUBINMIPS 0x03 #define JFFS2_COMPR_COPY 0x04 #define JFFS2_COMPR_DYNRUBIN 0x05 #define JFFS2_COMPR_ZLIB 0x06 #define JFFS2_COMPR_LZO 0x07 /* Compatibility flags. */ #define JFFS2_COMPAT_MASK 0xc000 /* What do to if an unknown nodetype is found */ #define JFFS2_NODE_ACCURATE 0x2000 /* INCOMPAT: Fail to mount the filesystem */ #define JFFS2_FEATURE_INCOMPAT 0xc000 /* ROCOMPAT: Mount read-only */ #define JFFS2_FEATURE_ROCOMPAT 0x8000 /* RWCOMPAT_COPY: Mount read/write, and copy the node when it's GC'd */ #define JFFS2_FEATURE_RWCOMPAT_COPY 0x4000 /* RWCOMPAT_DELETE: Mount read/write, and delete the node when it's GC'd */ #define JFFS2_FEATURE_RWCOMPAT_DELETE 0x0000 #define JFFS2_NODETYPE_DIRENT (JFFS2_FEATURE_INCOMPAT | JFFS2_NODE_ACCURATE | 1) typedef struct { uint32_t v32; } __attribute__((packed)) jint32_t; typedef struct { uint16_t v16; } __attribute__((packed)) jint16_t; struct jffs2_unknown_node { /* All start like this */ jint16_t magic; jint16_t nodetype; jint32_t totlen; /* So we can skip over nodes we don't grok */ jint32_t hdr_crc; }; struct jffs2_raw_dirent { jint16_t magic; jint16_t nodetype; /* == JFFS2_NODETYPE_DIRENT */ jint32_t totlen; jint32_t hdr_crc; jint32_t pino; jint32_t version; jint32_t ino; /* == zero for unlink */ jint32_t mctime; uint8_t nsize; uint8_t type; uint8_t unused[2]; jint32_t node_crc; jint32_t name_crc; uint8_t name[0]; }; #define je16_to_cpu(x) ((x).v16) #define je32_to_cpu(x) ((x).v32) static int bcm4908img_bootfs_ls(FILE *fp, struct bcm4908img_info *info) { struct jffs2_unknown_node node; struct jffs2_raw_dirent dirent; size_t offset; size_t bytes; int err = 0; for (offset = info->bootfs_offset; ; offset += (je32_to_cpu(node.totlen) + 0x03) & ~0x03) { char name[FILENAME_MAX + 1]; if (fseek(fp, offset, SEEK_SET)) { err = -errno; fprintf(stderr, "Failed to fseek: %d\n", err); return err; } bytes = fread(&node, 1, sizeof(node), fp); if (bytes != sizeof(node)) { fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); return -EIO; } if (je16_to_cpu(node.magic) != JFFS2_MAGIC_BITMASK) { break; } if (je16_to_cpu(node.nodetype) != JFFS2_NODETYPE_DIRENT) { continue; } memcpy(&dirent, &node, sizeof(node)); bytes += fread((uint8_t *)&dirent + sizeof(node), 1, sizeof(dirent) - sizeof(node), fp); if (bytes != sizeof(dirent)) { fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); return -EIO; } if (dirent.nsize + 1 > sizeof(name)) { /* Keep reading & printing BUT exit with error code */ fprintf(stderr, "Too long filename\n"); err = -ENOMEM; continue; } bytes = fread(name, 1, dirent.nsize, fp); if (bytes != dirent.nsize) { fprintf(stderr, "Failed to read filename\n"); return -EIO; } name[bytes] = '\0'; printf("%s\n", name); } return err; } static int bcm4908img_bootfs_mv(FILE *fp, struct bcm4908img_info *info, int argc, char **argv) { struct jffs2_unknown_node node; struct jffs2_raw_dirent dirent; const char *oldname; const char *newname; size_t offset; size_t bytes; int err = -ENOENT; if (argc - optind < 2) { fprintf(stderr, "No enough arguments passed\n"); return -EINVAL; } oldname = argv[optind++]; newname = argv[optind++]; if (strlen(newname) != strlen(oldname)) { fprintf(stderr, "New filename must have the same length as the old one\n"); return -EINVAL; } for (offset = info->bootfs_offset; ; offset += (je32_to_cpu(node.totlen) + 0x03) & ~0x03) { char name[FILENAME_MAX]; uint32_t crc32; if (fseek(fp, offset, SEEK_SET)) { err = -errno; fprintf(stderr, "Failed to fseek: %d\n", err); return err; } bytes = fread(&node, 1, sizeof(node), fp); if (bytes != sizeof(node)) { fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); return -EIO; } if (je16_to_cpu(node.magic) != JFFS2_MAGIC_BITMASK) { break; } if (je16_to_cpu(node.nodetype) != JFFS2_NODETYPE_DIRENT) { continue; } bytes += fread((uint8_t *)&dirent + sizeof(node), 1, sizeof(dirent) - sizeof(node), fp); if (bytes != sizeof(dirent)) { fprintf(stderr, "Failed to read %zu bytes\n", sizeof(node)); return -EIO; } if (dirent.nsize + 1 > sizeof(name)) { fprintf(stderr, "Too long filename\n"); err = -ENOMEM; continue; } bytes = fread(name, 1, dirent.nsize, fp); if (bytes != dirent.nsize) { fprintf(stderr, "Failed to read filename\n"); return -EIO; } name[bytes] = '\0'; if (debug) printf("offset:%08zx name_crc:%04x filename:%s\n", offset, je32_to_cpu(dirent.name_crc), name); if (strcmp(name, oldname)) { continue; } if (fseek(fp, offset + offsetof(struct jffs2_raw_dirent, name_crc), SEEK_SET)) { err = -errno; fprintf(stderr, "Failed to fseek: %d\n", err); return err; } crc32 = bcm4908img_crc32(0, newname, dirent.nsize); bytes = fwrite(&crc32, 1, sizeof(crc32), fp); if (bytes != sizeof(crc32)) { fprintf(stderr, "Failed to write new CRC32\n"); return -EIO; } if (fseek(fp, offset + offsetof(struct jffs2_raw_dirent, name), SEEK_SET)) { err = -errno; fprintf(stderr, "Failed to fseek: %d\n", err); return err; } bytes = fwrite(newname, 1, dirent.nsize, fp); if (bytes != dirent.nsize) { fprintf(stderr, "Failed to write new filename\n"); return -EIO; } /* Calculate new BCM4908 image checksum */ err = bcm4908img_calc_crc32(fp, info); if (err) { fprintf(stderr, "Failed to write new filename\n"); return err; } info->tail.crc32 = cpu_to_le32(info->crc32); if (fseek(fp, -sizeof(struct bcm4908img_tail), SEEK_END)) { err = -errno; fprintf(stderr, "Failed to write new filename\n"); return err; } if (fwrite(&info->tail, 1, sizeof(struct bcm4908img_tail), fp) != sizeof(struct bcm4908img_tail)) { fprintf(stderr, "Failed to write updated tail\n"); return -EIO; } printf("Successfully renamed %s to the %s\n", oldname, newname); return 0; } fprintf(stderr, "Failed to find %s\n", oldname); return -ENOENT; } static int bcm4908img_bootfs(int argc, char **argv) { struct bcm4908img_info info; const char *pathname = NULL; const char *mode; const char *cmd; FILE *fp; int c; int err = 0; while ((c = getopt(argc, argv, "i:")) != -1) { switch (c) { case 'i': pathname = optarg; break; } } if (argc - optind < 1) { fprintf(stderr, "No bootfs command specified\n"); err = -EINVAL; goto out; } cmd = argv[optind++]; mode = strcmp(cmd, "mv") ? "r" : "r+"; fp = bcm4908img_open(pathname, mode); if (!fp) { fprintf(stderr, "Failed to open BCM4908 image\n"); err = -EACCES; goto out; } err = bcm4908img_parse(fp, &info); if (err) { fprintf(stderr, "Failed to parse BCM4908 image\n"); goto err_close; } if (!strcmp(cmd, "ls")) { err = bcm4908img_bootfs_ls(fp, &info); } else if (!strcmp(cmd, "mv")) { err = bcm4908img_bootfs_mv(fp, &info, argc, argv); } else { err = -EINVAL; fprintf(stderr, "Unsupported bootfs command: %s\n", cmd); } err_close: bcm4908img_close(fp); out: return err; } /************************************************** * Start **************************************************/ static void usage() { printf("Usage:\n"); printf("\n"); printf("Info about a BCM4908 image:\n"); printf("\tbcm4908img info \n"); printf("\t-i \t\t\t\tinput BCM490 image\n"); printf("\n"); printf("Creating a new BCM4908 image:\n"); printf("\tbcm4908img create [options]\n"); printf("\t-f file\t\t\t\tadd data from specified file\n"); printf("\t-a alignment\t\t\tpad image with zeros to specified alignment\n"); printf("\t-A offset\t\t\t\tappend zeros until reaching specified offset\n"); printf("\n"); printf("Extracting from a BCM4908 image:\n"); printf("\tbcm4908img extract \n"); printf("\t-i \t\t\t\tinput BCM490 image\n"); printf("\t-t \t\t\t\tone of: cferom, bootfs, rootfs, firmware\n"); printf("\n"); printf("Access bootfs in a BCM4908 image:\n"); printf("\tbcm4908img bootfs \n"); printf("\t-i \t\t\t\tinput BCM490 image\n"); printf("\tls\t\t\t\t\tlist bootfs files\n"); printf("\tmv \t\t\trename bootfs file\n"); } int main(int argc, char **argv) { if (argc > 1) { optind++; if (!strcmp(argv[1], "info")) return bcm4908img_info(argc, argv); else if (!strcmp(argv[1], "create")) return bcm4908img_create(argc, argv); else if (!strcmp(argv[1], "extract")) return bcm4908img_extract(argc, argv); else if (!strcmp(argv[1], "bootfs")) return bcm4908img_bootfs(argc, argv); } usage(); return 0; }