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| #include <errno.h>
#include <stdio.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <net/route.h>
#include <fcntl.h>
#include <sys/socket.h>
#include <net/if.h>
#include <unistd.h>
int main()
{
int sockfd;
struct rtentry rt;
sockfd = socket(AF_INET, SOCK_DGRAM, 0);
if (sockfd == -1)
{
perror("socket creation failed\n");
return -1;
}
struct sockaddr_in *sockinfo = (struct sockaddr_in *)&rt.rt_gateway;
sockinfo->sin_family = AF_INET;
sockinfo->sin_addr.s_addr = inet_addr("192.168.0.1");
sockinfo = (struct sockaddr_in *)&rt.rt_dst;
sockinfo->sin_family = AF_INET;
sockinfo->sin_addr.s_addr = INADDR_ANY;
sockinfo = (struct sockaddr_in *)&rt.rt_genmask;
sockinfo->sin_family = AF_INET;
sockinfo->sin_addr.s_addr = INADDR_ANY;
rt.rt_flags = RTF_UP | RTF_GATEWAY;
rt.rt_dev = "eth0";
if(ioctl(sockfd, SIOCADDRT, &rt) < 0 )
perror("ioctl");
return 0;
}
|