1 #include <stdio.h>
2 #include <string.h>
3 #include <sys/socket.h>
4 #include <sys/types.h>
5 #include <sys/ioctl.h>
6 #include <net/if.h>
7 // #include <netinet/in.h>
8 #include <arpa/inet.h>
9 // #include <ifaddrs.h>
10
11 #define IF_NAME "eth0"
12
13 int main(void)
14 {
15 struct ifreq ifr;
16 int skfd = 0;
17 static char if_addr[16];
18
19 if ((skfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
20 }
21
22 strcpy(ifr.ifr_name, IF_NAME);
23 if (ioctl(skfd, SIOCGIFADDR, &ifr) < 0) {
24 close(skfd);
25 }
26 strcpy(if_addr, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
27 printf("ipaddr : %s\n", if_addr);
28 close(skfd);
29
30 }
