if (fd < 0) {
/* open a tun interface */
fd = open("/dev/net/tun", O_RDWR);
- if (fd < 0)
+ if (fd < 0) {
+ ppp_debug(ppp, "Couldn't open tun device. "
+ "Do you run oFono as root and do you "
+ "have the TUN module loaded?");
goto error;
+ }
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
strcpy(ifr.ifr_name, "ppp%d");