networking - ioctl (TUNSETIFF) : device or resource busy - Stack Overflow
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I am unable to set TUN interface. Everywhere i searched and it says the device should be rooted.
I am setting up proxyserver on my ubuntu 14.04 system
static int get_interface(char *name) {
int interface = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
strncpy(ifr.ifr_name, name, sizeof(ifr.ifr_name));
if (ioctl(interface, TUNSETIFF, (void *)&ifr) & 0) {
perror("Cannot get TUN interface");
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