git.zerfleddert.de Git - rsbs2/blob - firmware.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <fcntl.h>
   6 #include <unistd.h>
   7 #include <errno.h>
   8 #include <strings.h>
   9 #include "rsb-crc.h"
  10
  11 int main(int argc, char **argv)
  12 {
  13         struct stat statbuf;
  14         unsigned char *fw;
  15         int fd;
  16         int remaining;
  17         int ret;
  18         unsigned int crc, oldcrc;
  19
  20         if (argc != 2) {
  21                 fprintf(stderr,"Syntax: %s firmware.bin\n", argv[0]);
  22                 exit(1);
  23         }
  24
  25         if (stat(argv[1], &statbuf) == -1) {
  26                 perror("stat");
  27                 exit(1);
  28         }
  29
  30         if ((fd = open(argv[1], O_RDONLY)) == -1) {
  31                 perror("open");
  32                 exit(1);
  33         }
  34
  35         if ((fw = malloc(statbuf.st_size)) == NULL) {
  36                 perror("malloc");
  37                 exit(1);
  38         }
  39
  40         bzero(fw, statbuf.st_size);
  41
  42         remaining = statbuf.st_size;
  43
  44         while(remaining) {
  45                 if ((ret = read(fd, fw + (statbuf.st_size - remaining), remaining)) == -1) {
  46                         perror("read");
  47                         exit(1);
  48                 }
  49                 remaining -= ret;
  50         }
  51
  52         ret = rsb_crc2(fw, statbuf.st_size, 0x55335053, &crc);
  53         oldcrc = (unsigned int)*((unsigned int*)(fw + statbuf.st_size - 4));
  54
  55         printf("Checksum: 0x%08x, should be: 0x%08x\n", crc, oldcrc);
  56
  57         exit(0);
  58 }