Mac地址和字符串之間的轉換

std::string MacToStr(UINT8 * pMac,const char chKen/* = ':'*/)
{
char szFormat[] = "%02X:%02X:%02X:%02X:%02X:%02X";
int nLen = strlen(szFormat);
if (chKen != ':')
{
for (int i = 2;i < nLen;i += 3)
{
szFormat[i] = chKen;
}
}

char szMac[32] = {0};  
sprintf(szMac, szFormat, pMac[0], pMac[1], pMac[2], pMac[3], pMac[4], pMac[5]);  
std::string strRet(szMac);  
return strRet;

}

UINT8 charToData(const char ch)
{
switch(ch)
{
case '0': return 0;
case '1': return 1;
case '2': return 2;
case '3': return 3;
case '4': return 4;
case '5': return 5;
case '6': return 6;
case '7': return 7;
case '8': return 8;
case '9': return 9;
case 'a':
case 'A': return 10;
case 'b':
case 'B': return 11;
case 'c':
case 'C': return 12;
case 'd':
case 'D': return 13;
case 'e':
case 'E': return 14;
case 'f':
case 'F': return 15;
}
return 0;
}

bool StrToMac(const char * szMac,UINT8 * pMac)
{
const char * pTemp = szMac;
for (int i = 0;i < 6;++i)
{
pMac[i] = charToData(*pTemp++) * 16;
pMac[i] += charToData(*pTemp++);
pTemp++;
}
}

c語言有相似處理： int hex2num(char c)
{
if (c>='0' && c<='9') return c - '0';
if (c>='a' && c<='z') return c - 'a' + 10;//這裏+10的緣由是:好比16進制的a值爲10
if (c>='A' && c<='Z') return c - 'A' + 10;

printf("unexpected char: %c", c);  
return NON_NUM;

}

int str2mac(const charchar * szMac, charchar * pMac)
{
const charchar * pTemp = szMac;
int i;

for (i = 0;i < 6;++i)    
{    
    pMac[i] = hex2num(*pTemp++) * 16;    
    pMac[i] += hex2num(*pTemp++);    
}       
return 0;

}

int main()
{
char szValue[32] = "11AABB22CC33 ";
char szBSSID[6] = "";

str2mac(szValue, szBSSID);  
printf("Value = %s\n", szValue);  
 printf("bssid : %02x-%02x-%02x-%02x-%02x-%02x \n",   
            st_keys.bssid_name[0], st_keys.bssid_name[1],  
            st_keys.bssid_name[2], st_keys.bssid_name[3],  
            st_keys.bssid_name[4], st_keys.bssid_name[5]);  
return 0;

}
效果：

Value = 11AABB22CC33

bssid = 11-aa-bb-22-cc-33