mirror of https://gerrit.osmocom.org/osmo-tetra
43 lines
904 B
C
43 lines
904 B
C
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
#include <linux/if_tun.h>
|
|
#include <linux/if.h>
|
|
|
|
int tun_alloc(char *dev)
|
|
{
|
|
struct ifreq ifr;
|
|
int fd, err;
|
|
|
|
fd = open("/dev/net/tun", O_RDWR);
|
|
if (fd < 0)
|
|
return fd;
|
|
// return tun_alloc_old(dev);
|
|
|
|
memset(&ifr, 0, sizeof(ifr));
|
|
|
|
/* Flags: IFF_TUN - TUN device (no Ethernet headers)
|
|
* IFF_TAP - TAP device
|
|
*
|
|
* IFF_NO_PI - Do not provide packet information
|
|
*/
|
|
ifr.ifr_flags = IFF_TUN|IFF_NO_PI;
|
|
if( *dev )
|
|
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", dev);
|
|
|
|
if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
|
|
close(fd);
|
|
return err;
|
|
}
|
|
#if 0
|
|
strcpy(dev, ifr.ifr_name);
|
|
#endif
|
|
return fd;
|
|
}
|