#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <sys/ioctl.h>

int main(int argc, char *argv[])
{
 	int inet_sock;
 	struct ifreq ifr;

 	//建立套接字
 	inet_sock = socket(AF_INET, SOCK_DGRAM, 0);

	 //获得接口地址
 	bzero(&ifr, sizeof(ifr));
 	strcpy(ifr.ifr_name, "eth0");
 	if (ioctl(inet_sock, SIOCGIFADDR, &ifr) < 0)
  	perror("ioctl");
 	printf("host:%s/n", inet_ntoa(((struct sockaddr_in*)&(ifr.ifr_addr))->sin_addr));
 	//获得广播地址
 	bzero(&ifr, sizeof(ifr));
 	strcpy(ifr.ifr_name, "eth0");
 	if (ioctl(inet_sock, SIOCGIFBRDADDR, &ifr) < 0)
  	perror("ioctl");
 	printf("broadcast:%s/n", inet_ntoa(((struct sockaddr_in*)&(ifr.ifr_addr))->sin_addr));

 	return 0;
}