TP-Link Archer C7 v5 EU nvrammanager nm_checkSoftVer() dissasembly

nvrammanager.c

/*
root@ArcherC7v5:/# nvrammanager -r /proc/self/fd/1 -p soft-version
soft_ver:1.1.0 Build 20201120 rel.50406
fw_id:C339BA6D3F263C8AB6919A76DF430336

root@ArcherC7v5:/# md5sum /usr/bin/nvrammanager 
404b8d952f7cdc97199a0afc2e081a9a  /usr/bin/nvrammanager
*/

int nm_checkSoftVer(int param_1,int param_2)

{
  int r;
  uint32_t fw_version_hl;
  int ret;
  int upd_fw_minor;
  uint upd_fw_major;
  uint cur_fw_minor;
  uint cur_fw_major;
  uint soft_version_nvram [2];
  char buf [51];
  
  memset(soft_version_nvram,0,0x32);
  ret = 0;
  cur_fw_major = 0;
  cur_fw_minor = 0;
  upd_fw_major = 0;
  upd_fw_minor = 0;
  if ((0xb < param_2 + -8) && (r = strncmp((char *)(param_1 + 8),"soft_ver:",9), r == 0)) {
    sscanf((char *)(param_1 + 0x11),"%d.%d.%*s",&upd_fw_major,&upd_fw_minor);
    r = nm_api_readPtnFromNvram("soft-version",soft_version_nvram,0x32);
    if (r < 1) {
      printf("[NM_Error](%s) %05d: failed to read partition from flash!\r\n\r\n","nm_checkSoftVer",
             0x333);
    }
    else {
      r = strncmp((char *)soft_version_nvram,"soft_ver:",9);
      if (r == 0) {
        sscanf(buf,"%d.%d.%*s",&cur_fw_major,&cur_fw_minor);
      }
      else {
        fw_version_hl = ntohl(soft_version_nvram[0]);
        soft_version_nvram[0] = fw_version_hl & 0xffffff;
        cur_fw_major = (fw_version_hl << 8) >> 0x18;
        cur_fw_minor = (soft_version_nvram[0] << 0x10) >> 0x18;
      }
      printf(" (curFw_ver, newFw_ver) == (%d.%d, %d.%d) ",cur_fw_major,cur_fw_minor,upd_fw_major,
             upd_fw_minor);
      if (((int)upd_fw_major < (int)cur_fw_major) ||
         ((ret = 1, cur_fw_major == upd_fw_major && (upd_fw_minor < (int)cur_fw_minor)))) {
        ret = 0;
        printf("[NM_Error](%s) %05d: Firmwave not supports, check failed.\r\n\r\n","nm_checkSoftVer"
               ,0x350);
      }
    }
  }
  return ret;
}