uint32_t을 IP로 표현하기

 

c Syntax 

10 1 10 127

00001010 00000001 00001010 01111111

 

then the 32 bit binary number as one single integer has the decimal value.

1010000000010000101001111111(bin) = 167840383(dec)

you can programmatically convert between these number systems in either direction. consider (and understand) this snippet:

 

unsigned int  ipAddress = 167840383;

unsigned char octet[4]  = {0,0,0,0}; 

for (i=0; i<4; i++){

   octet[i] = ( ipAddress >> (i*8) ) & 0xFF;

}

unsigned int  ipAddress = 167840383;

unsigned char octet[4]  = {0,0,0,0};

for (i=0; i<4; i++)

{

    octet[i] = ( ipAddress >> (i*8) ) & 0xFF;

}

now you have the four octets as unsigned chars in the "octet[]" array (char is just an 8-bit integer), and you can print them in the decimal dot format: 

c Syntax (Toggle Plain Text)
 

printf("%d.%d.%d.%d\n",octet[3],octet[2],octet[1],octet[0]);printf("%d.%d.%d.%d\n",octet[3],octet[2],octet[1],octet[0]);