void vpn_died(struct connman_task *task, int exit_code, void *user_data)
{
struct vpn_provider *provider = user_data;
struct vpn_data *data = vpn_provider_get_data(provider);
int state = VPN_STATE_FAILURE;
enum vpn_provider_error ret;
DBG("provider %p data %p", provider, data);
if (!data)
goto vpn_exit;
state = data->state;
stop_vpn(provider);
vpn_provider_set_data(provider, NULL);
if (data->watch != 0) {
vpn_rtnl_remove_watch(data->watch);
data->watch = 0;
vpn_provider_unref(provider);
}
vpn_exit:
if (state != VPN_STATE_READY && state != VPN_STATE_DISCONNECT) {
const char *name;
struct vpn_driver_data *vpn_data = NULL;
name = vpn_provider_get_driver_name(provider);
if (name)
vpn_data = g_hash_table_lookup(driver_hash, name);
if (vpn_data &&
vpn_data->vpn_driver->error_code)
ret = vpn_data->vpn_driver->error_code(provider,
exit_code);
else
ret = VPN_PROVIDER_ERROR_UNKNOWN;
vpn_provider_indicate_error(provider, ret);
} else
vpn_provider_set_state(provider, VPN_PROVIDER_STATE_IDLE);
vpn_provider_set_index(provider, -1);
if (data) {
vpn_provider_unref(data->provider);
g_free(data->if_name);
g_free(data);
}
connman_task_destroy(task);
}
static int vpn_remove(struct connman_provider *provider)
{
struct vpn_data *data;
data = connman_provider_get_data(provider);
if (data == NULL)
return 0;
if (data->watch != 0)
connman_rtnl_remove_watch(data->watch);
data->watch = 0;
connman_task_stop(data->task);
g_usleep(G_USEC_PER_SEC);
stop_vpn(provider);
return 0;
}
static int vpn_connect(struct connman_provider *provider)
{
struct vpn_data *data = connman_provider_get_data(provider);
struct vpn_driver_data *vpn_driver_data;
const char *name;
int ret = 0;
if (data != NULL)
return -EISCONN;
data = g_try_new0(struct vpn_data, 1);
if (data == NULL)
return -ENOMEM;
data->provider = connman_provider_ref(provider);
data->watch = 0;
data->flags = 0;
data->task = NULL;
data->state = VPN_STATE_IDLE;
connman_provider_set_data(provider, data);
name = connman_provider_get_driver_name(provider);
if (name == NULL)
return -EINVAL;
vpn_driver_data = g_hash_table_lookup(driver_hash, name);
if (vpn_driver_data != NULL && vpn_driver_data->vpn_driver != NULL &&
vpn_driver_data->vpn_driver->flags != VPN_FLAG_NO_TUN) {
ret = vpn_create_tun(provider);
if (ret < 0)
goto exist_err;
}
data->task = connman_task_create(vpn_driver_data->program);
if (data->task == NULL) {
ret = -ENOMEM;
stop_vpn(provider);
goto exist_err;
}
if (connman_task_set_notify(data->task, "notify",
vpn_notify, provider)) {
ret = -ENOMEM;
stop_vpn(provider);
connman_task_destroy(data->task);
data->task = NULL;
goto exist_err;
}
ret = vpn_driver_data->vpn_driver->connect(provider, data->task,
data->if_name);
if (ret < 0) {
stop_vpn(provider);
connman_task_destroy(data->task);
data->task = NULL;
goto exist_err;
}
DBG("%s started with dev %s",
vpn_driver_data->provider_driver.name, data->if_name);
data->state = VPN_STATE_CONNECT;
return -EINPROGRESS;
exist_err:
connman_provider_set_index(provider, -1);
connman_provider_set_data(provider, NULL);
connman_provider_unref(data->provider);
g_free(data->if_name);
g_free(data);
return ret;
}
static int vpn_create_tun(struct connman_provider *provider)
{
struct vpn_data *data = connman_provider_get_data(provider);
struct ifreq ifr;
int i, fd, index;
int ret = 0;
if (data == NULL)
return -EISCONN;
fd = open("/dev/net/tun", O_RDWR | O_CLOEXEC);
if (fd < 0) {
i = -errno;
connman_error("Failed to open /dev/net/tun: %s",
strerror(errno));
ret = i;
goto exist_err;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
for (i = 0; i < 256; i++) {
sprintf(ifr.ifr_name, "vpn%d", i);
if (!ioctl(fd, TUNSETIFF, (void *)&ifr))
break;
}
if (i == 256) {
connman_error("Failed to find available tun device");
close(fd);
ret = -ENODEV;
goto exist_err;
}
data->if_name = (char *)g_strdup(ifr.ifr_name);
if (data->if_name == NULL) {
connman_error("Failed to allocate memory");
close(fd);
ret = -ENOMEM;
goto exist_err;
}
if (ioctl(fd, TUNSETPERSIST, 1)) {
i = -errno;
connman_error("Failed to set tun persistent: %s",
strerror(errno));
close(fd);
ret = i;
goto exist_err;
}
close(fd);
index = connman_inet_ifindex(data->if_name);
if (index < 0) {
connman_error("Failed to get tun ifindex");
stop_vpn(provider);
ret = -EIO;
goto exist_err;
}
connman_provider_set_index(provider, index);
return 0;
exist_err:
return ret;
}
static int vpn_connect(struct vpn_provider *provider,
vpn_provider_connect_cb_t cb,
const char *dbus_sender, void *user_data)
{
struct vpn_data *data = vpn_provider_get_data(provider);
struct vpn_driver_data *vpn_driver_data;
const char *name;
int ret = 0;
enum vpn_state state = VPN_STATE_UNKNOWN;
if (data)
state = data->state;
DBG("data %p state %d", data, state);
switch (state) {
case VPN_STATE_UNKNOWN:
data = g_try_new0(struct vpn_data, 1);
if (!data)
return -ENOMEM;
data->provider = vpn_provider_ref(provider);
data->watch = 0;
data->flags = 0;
data->task = NULL;
vpn_provider_set_data(provider, data);
/* fall through */
case VPN_STATE_DISCONNECT:
case VPN_STATE_IDLE:
case VPN_STATE_FAILURE:
case VPN_STATE_AUTH_FAILURE:
data->state = VPN_STATE_IDLE;
break;
case VPN_STATE_CONNECT:
return -EINPROGRESS;
case VPN_STATE_READY:
return -EISCONN;
}
name = vpn_provider_get_driver_name(provider);
if (!name)
return -EINVAL;
vpn_driver_data = g_hash_table_lookup(driver_hash, name);
if (!vpn_driver_data || !vpn_driver_data->vpn_driver) {
ret = -EINVAL;
goto exist_err;
}
if (vpn_driver_data->vpn_driver->flags != VPN_FLAG_NO_TUN) {
ret = vpn_create_tun(provider);
if (ret < 0)
goto exist_err;
}
data->task = connman_task_create(vpn_driver_data->program);
if (!data->task) {
ret = -ENOMEM;
stop_vpn(provider);
goto exist_err;
}
if (connman_task_set_notify(data->task, "notify",
vpn_notify, provider)) {
ret = -ENOMEM;
stop_vpn(provider);
connman_task_destroy(data->task);
data->task = NULL;
goto exist_err;
}
ret = vpn_driver_data->vpn_driver->connect(provider, data->task,
data->if_name, cb, dbus_sender,
user_data);
if (ret < 0 && ret != -EINPROGRESS) {
stop_vpn(provider);
connman_task_destroy(data->task);
data->task = NULL;
goto exist_err;
}
DBG("%s started with dev %s",
vpn_driver_data->provider_driver.name, data->if_name);
data->state = VPN_STATE_CONNECT;
return -EINPROGRESS;
exist_err:
vpn_provider_set_index(provider, -1);
vpn_provider_set_data(provider, NULL);
vpn_provider_unref(data->provider);
g_free(data->if_name);
g_free(data);
return ret;
}