static int _init(dev_eth_t *ethdev)
{
dev_eth_tap_t *dev = (dev_eth_tap_t*)ethdev;
/* check device parametrs */
if (dev == NULL) {
return -ENODEV;
}
char *name = dev->tap_name;
#ifdef __MACH__ /* OSX */
char clonedev[255] = "/dev/"; /* XXX bad size */
strncpy(clonedev + 5, name, 250);
#elif defined(__FreeBSD__)
char clonedev[255] = "/dev/"; /* XXX bad size */
strncpy(clonedev + 5, name, 250);
#else /* Linux */
struct ifreq ifr;
const char *clonedev = "/dev/net/tun";
#endif
/* initialize device descriptor */
dev->promiscous = 0;
/* implicitly create the tap interface */
if ((dev->tap_fd = real_open(clonedev , O_RDWR)) == -1) {
err(EXIT_FAILURE, "open(%s)", clonedev);
}
#if (defined(__MACH__) || defined(__FreeBSD__)) /* OSX/FreeBSD */
struct ifaddrs *iflist;
if (real_getifaddrs(&iflist) == 0) {
for (struct ifaddrs *cur = iflist; cur; cur = cur->ifa_next) {
if ((cur->ifa_addr->sa_family == AF_LINK) && (strcmp(cur->ifa_name, name) == 0) && cur->ifa_addr) {
struct sockaddr_dl *sdl = (struct sockaddr_dl *)cur->ifa_addr;
memcpy(dev->addr, LLADDR(sdl), sdl->sdl_alen);
break;
}
}
real_freeifaddrs(iflist);
}
#else /* Linux */
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strncpy(ifr.ifr_name, name, IFNAMSIZ);
if (real_ioctl(dev->tap_fd, TUNSETIFF, (void *)&ifr) == -1) {
_native_in_syscall++;
warn("ioctl TUNSETIFF");
warnx("probably the tap interface (%s) does not exist or is already in use", name);
real_exit(EXIT_FAILURE);
}
/* get MAC address */
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s", name);
if (real_ioctl(dev->tap_fd, SIOCGIFHWADDR, &ifr) == -1) {
_native_in_syscall++;
warn("ioctl SIOCGIFHWADDR");
if (real_close(dev->tap_fd) == -1) {
warn("close");
}
real_exit(EXIT_FAILURE);
}
memcpy(dev->addr, ifr.ifr_hwaddr.sa_data, NG_ETHERNET_ADDR_LEN);
/* change mac addr so it differs from what the host is using */
dev->addr[5]++;
#endif
DEBUG("ng_tapnet_init(): dev->addr = %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->addr[0], dev->addr[1], dev->addr[2],
dev->addr[3], dev->addr[4], dev->addr[5]);
/* configure signal handler for fds */
register_interrupt(SIGIO, _tap_isr);
#ifdef __MACH__
/* tuntap signalled IO is not working in OSX,
* * check http://sourceforge.net/p/tuntaposx/bugs/17/ */
_sigio_child(dev);
#else
/* configure fds to send signals on io */
if (fcntl(dev->tap_fd, F_SETOWN, _native_pid) == -1) {
err(EXIT_FAILURE, "ng_tapnet_init(): fcntl(F_SETOWN)");
}
/* set file access mode to non-blocking */
if (fcntl(dev->tap_fd, F_SETFL, O_NONBLOCK | O_ASYNC) == -1) {
err(EXIT_FAILURE, "ng_tabnet_init(): fcntl(F_SETFL)");
}
#endif /* not OSX */
DEBUG("ng_tapnet: initialized.\n");
return 0;
}
static int _init(netdev2_t *netdev)
{
DEBUG("%s:%s:%u\n", RIOT_FILE_RELATIVE, __func__, __LINE__);
netdev2_tap_t *dev = (netdev2_tap_t*)netdev;
/* check device parametrs */
if (dev == NULL) {
return -ENODEV;
}
char *name = dev->tap_name;
#ifdef __MACH__ /* OSX */
char clonedev[255] = "/dev/"; /* XXX bad size */
strncpy(clonedev + 5, name, 250);
#elif defined(__FreeBSD__)
char clonedev[255] = "/dev/"; /* XXX bad size */
strncpy(clonedev + 5, name, 250);
#else /* Linux */
struct ifreq ifr;
const char *clonedev = "/dev/net/tun";
#endif
/* initialize device descriptor */
dev->promiscous = 0;
/* implicitly create the tap interface */
if ((dev->tap_fd = real_open(clonedev, O_RDWR | O_NONBLOCK)) == -1) {
err(EXIT_FAILURE, "open(%s)", clonedev);
}
#if (defined(__MACH__) || defined(__FreeBSD__)) /* OSX/FreeBSD */
struct ifaddrs *iflist;
if (real_getifaddrs(&iflist) == 0) {
for (struct ifaddrs *cur = iflist; cur; cur = cur->ifa_next) {
if ((cur->ifa_addr->sa_family == AF_LINK) && (strcmp(cur->ifa_name, name) == 0) && cur->ifa_addr) {
struct sockaddr_dl *sdl = (struct sockaddr_dl *)cur->ifa_addr;
memcpy(dev->addr, LLADDR(sdl), sdl->sdl_alen);
break;
}
}
real_freeifaddrs(iflist);
}
#else /* Linux */
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
strncpy(ifr.ifr_name, name, IFNAMSIZ);
if (real_ioctl(dev->tap_fd, TUNSETIFF, (void *)&ifr) == -1) {
_native_in_syscall++;
warn("ioctl TUNSETIFF");
warnx("probably the tap interface (%s) does not exist or is already in use", name);
real_exit(EXIT_FAILURE);
}
/* get MAC address */
memset(&ifr, 0, sizeof(ifr));
snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "%s", name);
if (real_ioctl(dev->tap_fd, SIOCGIFHWADDR, &ifr) == -1) {
_native_in_syscall++;
warn("ioctl SIOCGIFHWADDR");
if (real_close(dev->tap_fd) == -1) {
warn("close");
}
real_exit(EXIT_FAILURE);
}
memcpy(dev->addr, ifr.ifr_hwaddr.sa_data, ETHERNET_ADDR_LEN);
/* change mac addr so it differs from what the host is using */
dev->addr[5]++;
#endif
DEBUG("gnrc_tapnet_init(): dev->addr = %02x:%02x:%02x:%02x:%02x:%02x\n",
dev->addr[0], dev->addr[1], dev->addr[2],
dev->addr[3], dev->addr[4], dev->addr[5]);
/* configure signal handler for fds */
native_async_read_setup();
native_async_read_add_handler(dev->tap_fd, NULL, _tap_isr);
#ifdef MODULE_NETSTATS_L2
memset(&netdev->stats, 0, sizeof(netstats_t));
#endif
DEBUG("gnrc_tapnet: initialized.\n");
return 0;
}