ip address.c

    /*

     * C Program to Get IP Address

     */

    #include <stdio.h>

    #include <string.h>

    #include <sys/types.h>

    #include <sys/socket.h>

    #include <sys/ioctl.h>

    #include <netinet/in.h>

    #include <net/if.h>

    #include <unistd.h>

    #include <arpa/inet.h>

     

    int main()

    {

        int n;

        struct ifreq ifr;

        char array[] = "eth0";

     

        n = socket(AF_INET, SOCK_DGRAM, 0);

        //Type of address to retrieve - IPv4 IP address

        ifr.ifr_addr.sa_family = AF_INET;

        //Copy the interface name in the ifreq structure

        strncpy(ifr.ifr_name , array , IFNAMSIZ - 1);

        ioctl(n, SIOCGIFADDR, &ifr);

        close(n);

        //display result

        printf("IP Address is %s - %s\n" , array , inet_ntoa(( (struct sockaddr_in *)&ifr.ifr_addr )->sin_addr) );

        return 0;

    }