/*
  Report the IWLWIFI firmware image version
  Copyright 2015 TJ <hacker@iam.tj>
  Licenced on the terms of the GNU General Public Licence version 3

  compile using:
   
   gcc -o iwlwifi_fw_version iwlwifi_fw_version.c

  run using:
   ./iwlwifi_fw_version <firmware-file>

  e.g:
   ./iwlwifi_fw_version /lib/firmware/iwlwifi-7260-10.ucode
   Type: TLV
   Version 23.15.10.0 /lib/firmware/iwlwifi-7260-10.ucode

 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#define IWL_UCODE_MAJOR(ver)  (((ver) & 0xFF000000) >> 24)
#define IWL_UCODE_MINOR(ver)  (((ver) & 0x00FF0000) >> 16)
#define IWL_UCODE_API(ver)    (((ver) & 0x0000FF00) >> 8)
#define IWL_UCODE_SERIAL(ver) ((ver) & 0x000000FF)

int
main (int argc, char **argv, char **env)
{
  int result = 0;
  int fd = -1;
  unsigned int ver = 0;
  ssize_t qty = 0;
  off_t pos = 0;

  if (argc < 2 || (fd = open(argv[1], O_RDONLY)) < 0) {
   fprintf(stderr, "%s\n", "Please provide correct path/to/firmware");
   return 1;
  }

  qty = read(fd, (void *)&ver, 4);

  if (ver == 0) {
   pos =lseek(fd, 0x48, SEEK_SET);
   qty = read(fd, (void *)&ver, 4);
  }

  printf("Version %d.%d.%d.%d Type %s %s\n",
          IWL_UCODE_MAJOR(ver),
          IWL_UCODE_MINOR(ver),
          IWL_UCODE_API(ver),
          IWL_UCODE_SERIAL(ver),
          pos > 4 ? "TLV" : "V1/V2",
          argv[1]
  );

  close(fd);
 
  return result;
}