testvnet2.c

嵌入式系统的网络仿真

//---------------------------------------------------------------------
//test open device file /dev/net/vnet
//test hif net device
//test ioctl VNETSETIFF, and ifr_name=NULL
//if ifr_name==NULL, then should use 'ifconfig vnet0 inet ......'
//----------------------------------------------------------------------
#include <net/if.h>
//#include <linux/if_tun.h>
#include "if_vnet.h"
#include <sys/ioctl.h>

void main(void){

int tapif_fd;
struct ifreq ifr;
char buf[1024];

tapif_fd = open("/dev/net/vnet", 2);
if(tapif_fd<0){ 
	perror("open");exit(-1);
};
printf("open vnet ok!\n");

memset(&ifr, 0, sizeof(ifr));
//no need to set name, do it in vnet_hostif_create
//I think when you want more vnet, then you should set 
//tht name for vnet.
//IFNAMSIZ=16
//strncpy(ifr.ifr_name, "vnet1", IFNAMSIZ);
ifr.ifr_flags = IFF_VNET;
if (ioctl(tapif_fd, VNETSETIFF, (void *) &ifr) < 0) {
    perror(buf);
    exit(-1);
}
printf("ioctl vnet ok\n");

sleep(2);
snprintf(buf, sizeof(buf), "ifconfig vnet0 inet %d.%d.%d.%d",
           10,0,0,1);
  
printf("tapif_init: system(\"%s\");\n", buf);
system(buf);

while(1){ sleep(30);};
//printf("input a key....\n");
//getc();
}