Convert IP to Integer

Formula would be :-

First Octet * (256 ^ 3) + Second Octet * (256 ^ 2) 
+ Third Octet * (256 ^ 1) + Fourth Octet

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23

#include "stdio.h" #include "math.h" /* Function to convert IP address into Integer * Input : IP address array * Output : Converted IP */ unsigned int ip_to_int(unsigned in[]) { return ((in[0]*(pow(256,3))) + (in[1]*(pow(256,2))) + (in[2]*(pow(256,1))) + (in[3])); } int main(int argc, char **argv) { unsigned ip_addr[] = { 192, 168, 1, 124 }; printf("Input : %d.%d.%d.%d\n", ip_addr[0], ip_addr[1], ip_addr[2], ip_addr[3]); printf("Output : %u\n", ip_to_int(ip_addr)); return 0; }

[root@Imperfecto_1 ~] gcc run.c && ./a.out
Input  : 192.168.1.124
Output : 3232235900