将MAC字符串/十六进制相互转换(已测)

int macStrToMacNum(unsigned char *macstr,unsigned char *macAddrNum)
{
 int i = 0,j = 0,value;
 unsigned char str_tmp[6]="\0",tmp='\0';
 if(macstr == NULL || macAddrNum == NULL)
 {
  printf("mac null !\n");
  return -1; 
 }
 for(i=0;i<6;i++)
 {
  bzero(str_tmp,sizeof(str_tmp));
  memcpy(str_tmp,macstr,2*sizeof(char)); 
  macstr +=2;
  macAddrNum[i]='\0';
  for(j=strlen((char *)str_tmp)-1;j>=0;j--)
  {
   switch(tolower(str_tmp[j]))
   {
    case '1' : value = 0x1; break;
    case '2' : value = 0x2; break;
    case '3' : value = 0x3; break;
    case '4' : value = 0x4; break;
          case '5' : value = 0x5; break;
           case '6' : value = 0x6; break;
    case '7' : value = 0x7; break;
           case '8' : value = 0x8; break;
    case '9' : value = 0x9; break;
           case 'a' : value = 0xa; break;
    case 'b' : value = 0xb; break;
           case 'c' : value = 0xc; break;
    case 'd' : value = 0xd; break;
       case 'e' : value = 0xe; break;
    case 'f' : value = 0xf; break;
           case '0' : value = 0x0; break;
    default :
     printf("error str_tmp[j]=%c \n!",str_tmp[j]);//shiner
     return -1;
   } 
   macAddrNum[i] |= (unsigned char )(value << ((strlen((char *)str_tmp)-1-j)*4));
  }
 }  
 return 0;
}

 

 

int macNumToStr(char *macAddr, char *str) {
   if ( macAddr == NULL ) return -1;
   if ( str == NULL ) return -1;

   sprintf(str, "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x",
           (unsigned char ) macAddr[0], (unsigned char ) macAddr[1], (unsigned char ) macAddr[2],
           (unsigned char ) macAddr[3], (unsigned char ) macAddr[4], (unsigned char ) macAddr[5]);

   return 0;
}