diff options
Diffstat (limited to 'tools/firmware-utils/src/airlink.c')
| -rw-r--r-- | tools/firmware-utils/src/airlink.c | 332 |
1 files changed, 332 insertions, 0 deletions
diff --git a/tools/firmware-utils/src/airlink.c b/tools/firmware-utils/src/airlink.c new file mode 100644 index 000000000..560a58df5 --- /dev/null +++ b/tools/firmware-utils/src/airlink.c @@ -0,0 +1,332 @@ +/* + * Thanks to Vassily Galinsky for this tool +***************************************************************************** +AIRLINK AR525W firmware image structure + -8:-5 Extended (httpd) header checksum - sum2 + -4:-1 Extended (httpd) header magic - "ARRN" - 0x4e525241 + 0: 3 Standard (tftpd) header magic - "GMTK" - 0x4b544d47 + 4: 7 Standard (tftpd) header checksum - sum1 + 8: b 0 + c: f Size of compressed linux kernel + 10:13 Size of firmware image file with standard header + 14:17 Product code - 0x5 + 18:1b Bootloader checksum - sum0 + 1c:1f 0 + 20: Compressed linux kernel + - Squashfs or jffs2 file system - kernel dependent - either 32 bytes or sector aligned +*****************************************************************************/ +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <netinet/in.h> + +typedef unsigned char uchar; + +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 +}; + +uint32_t header[] = { + 0x00000000, 0x4e525241, + 0x4b544d47, 0x00000000, 0x00000000, 0x000afd4a, + 0x00000000, 0x00000005, 0x00000000, 0x00000000 +}; + +static int JFFS2 = 0; + +int generate_image(char *kname, char *fsname, char *fname, int EHDR) +{ + int i; + uint32_t lenk, lens; + uchar *bk, *bs; + int fkd, ffd, fsd; + fkd = open(kname, O_RDONLY); + ffd = creat(fname, 0644); + if ((fkd < 0) || (ffd < 0)) + return -1; + if (fsname) { + fsd = open(fsname, O_RDONLY); + if (fsd < 0) + return -1; + } + lenk = lseek(fkd, 0, SEEK_END); + header[5] = lenk; + bk = (uchar *) mmap(NULL, lenk, PROT_READ, MAP_SHARED, fkd, 0); + if (bk == MAP_FAILED) + return -1; + if (fsname) { + lens = lseek(fsd, 0, SEEK_END); + bs = (uchar *) mmap(NULL, lens, PROT_READ, MAP_SHARED, fsd, + 0); + if (bs == MAP_FAILED) + return -1; + } + if (EHDR) + write(ffd, header, 0x28); + else + write(ffd, header + 2, 0x20); + write(ffd, bk, lenk); + lenk += 0x20; + if (!JFFS2) JFFS2 = 0x20; + printf("Padding header+kernel - 0x%x + 0x%x = 0x%x\n", + lenk, ((lenk - 1 + JFFS2) / JFFS2) * JFFS2 - lenk, + ((lenk - 1 + JFFS2) / JFFS2) * JFFS2); + for (i = 0; i < ((lenk - 1 + JFFS2) / JFFS2) * JFFS2 - lenk; i++) + write(ffd, header, 1); + if (fsname) { + write(ffd, bs, lens); + close(fsd); + } + close(ffd); + close(fkd); + return 0; +} + +uint32_t crc32(uchar * 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[(uchar) (s0 & 0xFF) ^ buf[i]]; + } + sum = ~s0; + return sum; +} + +void usage(char *prog) +{ + printf("Usage: %s [-b 0/1] image_filename \n", prog); + printf(" update checksums for firmware file\n"); + printf + ("Usage: %s [-b 0/1] [-j erasesize_in_kibytes] [-e] kernel filesystem image_filename \n", + prog); + printf(" generate firmware file and update checksums\n"); + printf("--------------------------------------------------\n"); + printf(" -e - generate header for web upload\n"); + printf(" -b 0/1 - clear/update bootloader checksum\n"); + printf(" -j erasesize_in_kibytes - generate header for jffs2 filesystem\n"); +} + +int main(int argc, char **argv) +{ + uchar b[0x400]; + char EHDR = 0; + char BHDR = 0; + int c, fd; + extern char *optarg; + extern int optind, optopt; + + while ((c = getopt(argc, argv, "b:ej:")) != -1) { + switch (c) { + case 'b': + if (optarg[0] == '1') + BHDR = 1; + break; + case 'e': + EHDR = 1; + break; + case 'j': + sscanf(optarg, "%i", &JFFS2); + JFFS2 *= 1024; + break; + case '?': + fprintf(stderr, "\nError: unknown arg %c\n\n\n", + optopt); + usage(argv[0]); + exit(-1); + } + } + if (((argc - optind) < 1) && ((argc - optind) > 3)) { + usage(argv[0]); + exit(-1); + } + if ((argc - optind) == 3) + if (generate_image + (argv[optind], argv[optind + 1], argv[optind + 2], + EHDR)) { + fprintf(stderr, + "\nError generating image file %s\n\n\n", + argv[argc - 1]); + usage(argv[0]); + exit(-1); + } + if ((argc - optind) == 2) + if (generate_image + (argv[optind], NULL, argv[optind + 1], EHDR)) { + fprintf(stderr, + "\nError generating image file %s\n\n\n", + argv[argc - 1]); + usage(argv[0]); + exit(-1); + } + + fd = open(argv[argc - 1], O_RDWR); + if (fd < 0) { + fprintf(stderr, "\nImage file not found %s\n\n\n", + argv[argc - 1]); + usage(argv[0]); + exit(-1); + } + long i, len = lseek(fd, 0, SEEK_END); + lseek(fd, 0, SEEK_SET); + uchar *buf = malloc(len); + read(fd, buf, len); + uint32_t sum, l0; + uint32_t MagicS = 0x474d544b; + uint32_t MagicE = 0x4152524e; + if (ntohl(*((uint32_t *) buf)) == MagicS) { + fprintf(stderr, + "Image without extra 8 bytes - Standard header\n"); + buf[0x10] = len & 0xff; + buf[0x11] = (len >> 8) & 0xff; + buf[0x12] = (len >> 16) & 0xff; + buf[0x13] = (len >> 24) & 0xff; + lseek(fd, 0x10, SEEK_SET); + write(fd, buf + 0x10, 0x4); + EHDR = 0; + } else if ((ntohl(*((uint32_t *) (buf + 0x8))) == MagicS) + && ((ntohl(*((uint32_t *) (buf + 0x4))) == MagicE))) { + fprintf(stderr, + "Image with extra 8 bytes - Extended header\n"); + *((uint32_t *) (buf + 0x18)) = len - 8; + buf[0x18] = (len - 8) & 0xff; + buf[0x19] = ((len - 8) >> 8) & 0xff; + buf[0x1a] = ((len - 8) >> 16) & 0xff; + buf[0x1b] = ((len - 8) >> 24) & 0xff; + lseek(fd, 0x18, SEEK_SET); + write(fd, buf + 0x18, 0x4); + buf += 8; + EHDR = 1; + } else if (len == buf[0x10] | ((uint32_t)buf[0x11] << 8) | ((uint32_t)buf[0x12] << 16) | ((uint32_t)buf[0x13] << 24)) { + fprintf(stderr, + "Image without extra 8 bytes - Standard header\n"); + EHDR = 0; + } else if (len == (buf[0x18] | ((uint32_t)buf[0x19] << 8) | ((uint32_t)buf[0x1a] << 16) | ((uint32_t)buf[0x1b] << 24)) + 8) { + fprintf(stderr, + "Image with extra 8 bytes - Extended header\n"); + buf += 8; + EHDR = 1; + } else { + fprintf(stderr, "ERROR: Wrong image size\n"); + exit(-1); + } + l0 = buf[0x10] | ((uint32_t)buf[0x11] << 8) | ((uint32_t)buf[0x12] << 16) | ((uint32_t)buf[0x13] << 24); + if (!BHDR) + *((uint32_t *) & buf[0x18]) = 0; + unsigned long sum0 = buf[0x18] | ((uint32_t)buf[0x19] << 8) | ((uint32_t)buf[0x1a] << 16) | ((uint32_t)buf[0x1b] << 24); + unsigned long sum1 = buf[0x4] | ((uint32_t)buf[0x5] << 8) | ((uint32_t)buf[0x6] << 16) | ((uint32_t)buf[0x7] << 24); + *((uint32_t *) & buf[0x4]) = 0x0L; + memcpy(b, buf, 0x100); + memcpy(b + 0x100, buf + ((l0 >> 1) - ((l0 & 0x6) >> 1)), 0x100); + memcpy(b + 0x200, buf + (l0 - 0x200), 0x200); + *((uint32_t *) & b[0x18]) = 0x0L; + + sum = crc32(b, 0x400); + printf("CRC32 sum0 - (%x, %x, %x)\n", sum, sum0, 0x400); + if (EHDR) + lseek(fd, 0x20, SEEK_SET); + else + lseek(fd, 0x18, SEEK_SET); + buf[0x18] = (BHDR ? sum : sum0) & 0xff; + buf[0x19] = ((BHDR ? sum : sum0) >> 8) & 0xff; + buf[0x1a] = ((BHDR ? sum : sum0) >> 16) & 0xff; + buf[0x1b] = ((BHDR ? sum : sum0) >> 24) & 0xff; + write(fd, &buf[0x18], 0x4); + + sum = crc32(buf, l0); + printf("CRC32 sum1 - (%x, %x, %x)\n", sum, sum1, l0); + if (EHDR) + lseek(fd, 0xC, SEEK_SET); + else + lseek(fd, 0x4, SEEK_SET); + buf[0x4] = sum & 0xff; + buf[0x5] = (sum >> 8) & 0xff; + buf[0x6] = (sum >> 16) & 0xff; + buf[0x7] = (sum >> 24) & 0xff; + write(fd, &buf[0x4], 0x4); + if (EHDR) { + unsigned long sum2 = buf[-0x8] | ((uint32_t)buf[-0x7] << 8) | ((uint32_t)buf[-0x6] << 16) | ((uint32_t)buf[-0x5] << 24); + *((uint32_t *) & buf[-0x8]) = 0L; + sum = crc32(buf - 0x4, len - 0x4); + printf("CRC32 sum2 - (%x, %x, %x)\n", sum, sum2, + len - 0x4); + lseek(fd, 0, SEEK_SET); + *((uint32_t *) & buf[-0x8]) = htonl(sum); + write(fd, &buf[-0x8], 0x4); + buf -= 8; + } + close(fd); + free(buf); + return 0; +} |