diff options
Diffstat (limited to 'tools/firmware-utils')
| -rw-r--r-- | tools/firmware-utils/src/airlink.c | 60 |
1 files changed, 36 insertions, 24 deletions
diff --git a/tools/firmware-utils/src/airlink.c b/tools/firmware-utils/src/airlink.c index 226f750..a98aba7 100644 --- a/tools/firmware-utils/src/airlink.c +++ b/tools/firmware-utils/src/airlink.c @@ -17,11 +17,13 @@ AIRLINK AR525W firmware image structure *****************************************************************************/ #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 long u32; typedef unsigned char uchar; @@ -240,29 +242,36 @@ int main(int argc, char **argv) uchar *buf = malloc(len); read(fd, buf, len); u32 sum, l0; - u32 MagicS = 0x4b544d47; - u32 MagicE = 0x4e525241; - if (*((u32 *) buf) == MagicS) { + u32 MagicS = 0x474d544b; + u32 MagicE = 0x4152524e; + if (htonl(*((u32 *) buf)) == MagicS) { fprintf(stderr, "Image without extra 8 bytes - Standard header\n"); - *((u32 *) (buf + 0x10)) = len; + 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 ((*((u32 *) (buf + 0x8)) == MagicS) - && ((*((u32 *) (buf + 0x4)) == MagicE))) { + } else if ((htonl(*((u32 *) (buf + 0x8))) == MagicS) + && ((htonl(*((u32 *) (buf + 0x4))) == MagicE))) { fprintf(stderr, "Image with extra 8 bytes - Extended header\n"); *((u32 *) (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 == *((u32 *) (buf + 0x10))) { + } else if (len == buf[0x10] | ((u32)buf[0x11] << 8) | ((u32)buf[0x12] << 16) | ((u32)buf[0x13] << 24)) { fprintf(stderr, "Image without extra 8 bytes - Standard header\n"); EHDR = 0; - } else if (len == *((u32 *) (buf + 0x18)) + 8) { + } else if (len == (buf[0x18] | ((u32)buf[0x19] << 8) | ((u32)buf[0x1a] << 16) | ((u32)buf[0x1b] << 24)) + 8) { fprintf(stderr, "Image with extra 8 bytes - Extended header\n"); buf += 8; @@ -271,18 +280,15 @@ int main(int argc, char **argv) fprintf(stderr, "ERROR: Wrong image size\n"); exit(-1); } - l0 = *((u32 *) & buf[0x10]); + l0 = buf[0x10] | ((u32)buf[0x11] << 8) | ((u32)buf[0x12] << 16) | ((u32)buf[0x13] << 24); if (!BHDR) *((u32 *) & buf[0x18]) = 0; - unsigned long sum0 = *((u32 *) & buf[0x18]); - unsigned long sum1 = *((u32 *) & buf[0x4]); + unsigned long sum0 = buf[0x18] | ((u32)buf[0x19] << 8) | ((u32)buf[0x1a] << 16) | ((u32)buf[0x1b] << 24); + unsigned long sum1 = buf[0x4] | ((u32)buf[0x5] << 8) | ((u32)buf[0x6] << 16) | ((u32)buf[0x7] << 24); *((u32 *) & buf[0x4]) = 0x0L; - for (i = 0; i < 0x100; i++) - b[i] = buf[i]; - for (i = 0; i < 0x100; i++) - b[0x100 + i] = buf[(l0 >> 1) + i]; - for (i = 0; i < 0x200; i++) - b[0x200 + i] = buf[l0 - 0x200 + i]; + memcpy(b, buf, 0x100); + memcpy(b + 0x100, buf + ((l0 >> 1) - ((l0 & 0x6) >> 1)), 0x100); + memcpy(b + 0x200, buf + (I0 - 0x200), 0x200); *((u32 *) & b[0x18]) = 0x0L; sum = crc32(b, 0x400); @@ -291,10 +297,10 @@ int main(int argc, char **argv) lseek(fd, 0x20, SEEK_SET); else lseek(fd, 0x18, SEEK_SET); - if (BHDR) - *((u32 *) & buf[0x18]) = sum; - else - *((u32 *) & buf[0x18]) = sum0; + 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); @@ -303,17 +309,23 @@ int main(int argc, char **argv) lseek(fd, 0xC, SEEK_SET); else lseek(fd, 0x4, SEEK_SET); - *((u32 *) & buf[0x4]) = sum; + 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 = *((u32 *) & buf[-0x8]); + unsigned long sum2 = buf[-0x8] | ((u32)buf[-0x7] << 8) | ((u32)buf[-0x6] << 16) | ((u32)buf[-0x5] << 24); *((u32 *) & buf[-0x8]) = 0L; sum = crc32(buf - 0x4, len - 0x4); sum = htonl(sum); printf("CRC32 sum2 - (%x, %x, %x)\n", sum, sum2, len - 0x4); lseek(fd, 0, SEEK_SET); - *((u32 *) & buf[-0x8]) = sum; + buf[-0x8] = sum & 0xff; + buf[-0x7] = (sum >> 8) & 0xff; + buf[-0x6] = (sum >> 16) & 0xff; + buf[-0x5] = (sum >> 24) & 0xff; write(fd, &buf[-0x8], 0x4); buf -= 8; } |