mirror of https://gerrit.osmocom.org/osmo-tetra
add missing tun/tap utility routines
This commit is contained in:
parent
ee7a645ca4
commit
025c3fc4c9
|
@ -0,0 +1,42 @@
|
|||
#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 )
|
||||
strncpy(ifr.ifr_name, dev, IFNAMSIZ);
|
||||
|
||||
if( (err = ioctl(fd, TUNSETIFF, (void *) &ifr)) < 0 ){
|
||||
close(fd);
|
||||
return err;
|
||||
}
|
||||
#if 0
|
||||
strcpy(dev, ifr.ifr_name);
|
||||
#endif
|
||||
return fd;
|
||||
}
|
Loading…
Reference in New Issue