main.c

用ioctl删除一条路由

#include <errno.h>
#include <netdb.h>
#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <net/route.h>
#include <netinet/in.h>
#include <linux/if_arp.h>
#include <linux/if_ether.h>

#define E_ERR   1

int main()
{
	struct rtentry  rt;
	struct sockaddr_in my_addr;
	int sock_fd;
	char devi[] = "eth0";
	
	if ((sock_fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
	{
		perror("socket");
		close(sock_fd);
		return E_ERR;
	}
	
	rt.rt_flags = (RTF_UP | RTF_GATEWAY | RTF_HOST);//RTF_DEFAULT | 
	my_addr.sin_family = AF_INET;

	inet_aton("199.0.0.0", &my_addr.sin_addr);
	memcpy(&rt.rt_dst, &my_addr, sizeof(struct sockaddr));
	
	inet_aton("199.0.0.110", &my_addr.sin_addr);
	memcpy(&rt.rt_gateway, &my_addr, sizeof(struct sockaddr));
	
	inet_aton("255.255.255.0", &my_addr.sin_addr);
	memcpy(&rt.rt_genmask, &my_addr, sizeof(struct sockaddr));
	
	rt.rt_dev = devi;
	
	if (ioctl(sock_fd, SIOCDELRT, &rt) < 0)
	{
		perror("SIOCADDRT");
		close(sock_fd);
		return E_ERR;
	}
	
	return 0;
}