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authorJukka Rissanen <jukka.rissanen@linux.intel.com>2012-11-12 12:07:21 (GMT)
committerPatrik Flykt <patrik.flykt@linux.intel.com>2012-11-23 10:58:50 (GMT)
commit4ba04eb6172f898402e0aa66f0dc8f564a12279f (patch)
tree7a67e489ea3de6f65e65d6034b2a0951db709cd0 /vpn/plugins/vpn.c
parenta426464354273a5586612b6577288e3662e3f8ac (diff)
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vpn: New vpn daemon that handles vpn connections and clients
Diffstat (limited to 'vpn/plugins/vpn.c')
-rw-r--r--vpn/plugins/vpn.c535
1 files changed, 535 insertions, 0 deletions
diff --git a/vpn/plugins/vpn.c b/vpn/plugins/vpn.c
new file mode 100644
index 0000000..2a0fdaf
--- /dev/null
+++ b/vpn/plugins/vpn.c
@@ -0,0 +1,535 @@
+/*
+ *
+ * ConnMan VPN daemon
+ *
+ * Copyright (C) 2007-2012 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#define _GNU_SOURCE
+#include <string.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <stdio.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <sys/types.h>
+#include <linux/if_tun.h>
+#include <net/if.h>
+
+#include <dbus/dbus.h>
+
+#include <glib/gprintf.h>
+
+#include <connman/log.h>
+#include <connman/rtnl.h>
+#include <connman/task.h>
+#include <connman/inet.h>
+
+#include "../vpn-rtnl.h"
+#include "../vpn-provider.h"
+
+#include "vpn.h"
+
+struct vpn_data {
+ struct vpn_provider *provider;
+ char *if_name;
+ unsigned flags;
+ unsigned int watch;
+ unsigned int state;
+ struct connman_task *task;
+};
+
+struct vpn_driver_data {
+ const char *name;
+ const char *program;
+ struct vpn_driver *vpn_driver;
+ struct vpn_provider_driver provider_driver;
+};
+
+GHashTable *driver_hash = NULL;
+
+static int stop_vpn(struct vpn_provider *provider)
+{
+ struct vpn_data *data = vpn_provider_get_data(provider);
+ struct vpn_driver_data *vpn_driver_data;
+ const char *name;
+ struct ifreq ifr;
+ int fd, err;
+
+ if (data == NULL)
+ return -EINVAL;
+
+ name = vpn_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)
+ return 0;
+
+ memset(&ifr, 0, sizeof(ifr));
+ ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
+ sprintf(ifr.ifr_name, "%s", data->if_name);
+
+ fd = open("/dev/net/tun", O_RDWR | O_CLOEXEC);
+ if (fd < 0) {
+ err = -errno;
+ connman_error("Failed to open /dev/net/tun to device %s: %s",
+ data->if_name, strerror(errno));
+ return err;
+ }
+
+ if (ioctl(fd, TUNSETIFF, (void *)&ifr)) {
+ err = -errno;
+ connman_error("Failed to TUNSETIFF for device %s to it: %s",
+ data->if_name, strerror(errno));
+ close(fd);
+ return err;
+ }
+
+ if (ioctl(fd, TUNSETPERSIST, 0)) {
+ err = -errno;
+ connman_error("Failed to set tun device %s nonpersistent: %s",
+ data->if_name, strerror(errno));
+ close(fd);
+ return err;
+ }
+ close(fd);
+ DBG("Killed tun device %s", data->if_name);
+ return 0;
+}
+
+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 == NULL)
+ goto vpn_exit;
+
+ state = data->state;
+
+ stop_vpn(provider);
+ vpn_provider_set_data(provider, NULL);
+
+ if (data->watch != 0) {
+ vpn_provider_unref(provider);
+ vpn_rtnl_remove_watch(data->watch);
+ data->watch = 0;
+ }
+
+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 != NULL)
+ vpn_data = g_hash_table_lookup(driver_hash, name);
+
+ if (vpn_data != NULL &&
+ vpn_data->vpn_driver->error_code != NULL)
+ ret = vpn_data->vpn_driver->error_code(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 != NULL) {
+ vpn_provider_unref(data->provider);
+ g_free(data->if_name);
+ g_free(data);
+ }
+
+ connman_task_destroy(task);
+}
+
+int vpn_set_ifname(struct vpn_provider *provider, const char *ifname)
+{
+ struct vpn_data *data = vpn_provider_get_data(provider);
+ int index;
+
+ if (ifname == NULL || data == NULL)
+ return -EIO;
+
+ index = connman_inet_ifindex(ifname);
+ if (index < 0)
+ return -EIO;
+
+ if (data->if_name != NULL)
+ g_free(data->if_name);
+
+ data->if_name = (char *)g_strdup(ifname);
+ vpn_provider_set_index(provider, index);
+
+ return 0;
+}
+
+static void vpn_newlink(unsigned flags, unsigned change, void *user_data)
+{
+ struct vpn_provider *provider = user_data;
+ struct vpn_data *data = vpn_provider_get_data(provider);
+
+ if ((data->flags & IFF_UP) != (flags & IFF_UP)) {
+ if (flags & IFF_UP) {
+ data->state = VPN_STATE_READY;
+ vpn_provider_set_state(provider,
+ VPN_PROVIDER_STATE_READY);
+ }
+ }
+ data->flags = flags;
+}
+
+static DBusMessage *vpn_notify(struct connman_task *task,
+ DBusMessage *msg, void *user_data)
+{
+ struct vpn_provider *provider = user_data;
+ struct vpn_data *data;
+ struct vpn_driver_data *vpn_driver_data;
+ const char *name;
+ int state, index;
+
+ data = vpn_provider_get_data(provider);
+
+ name = vpn_provider_get_driver_name(provider);
+ if (name == NULL)
+ return NULL;
+
+ vpn_driver_data = g_hash_table_lookup(driver_hash, name);
+ if (vpn_driver_data == NULL)
+ return NULL;
+
+ state = vpn_driver_data->vpn_driver->notify(msg, provider);
+ switch (state) {
+ case VPN_STATE_CONNECT:
+ case VPN_STATE_READY:
+ index = vpn_provider_get_index(provider);
+ vpn_provider_ref(provider);
+ data->watch = vpn_rtnl_add_newlink_watch(index,
+ vpn_newlink, provider);
+ connman_inet_ifup(index);
+ break;
+
+ case VPN_STATE_UNKNOWN:
+ case VPN_STATE_IDLE:
+ case VPN_STATE_DISCONNECT:
+ case VPN_STATE_FAILURE:
+ vpn_provider_set_state(provider,
+ VPN_PROVIDER_STATE_DISCONNECT);
+ break;
+
+ case VPN_STATE_AUTH_FAILURE:
+ vpn_provider_indicate_error(provider,
+ VPN_PROVIDER_ERROR_AUTH_FAILED);
+ break;
+ }
+
+ return NULL;
+}
+
+static int vpn_create_tun(struct vpn_provider *provider)
+{
+ struct vpn_data *data = vpn_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;
+ }
+ vpn_provider_set_index(provider, index);
+
+ return 0;
+
+exist_err:
+ return ret;
+}
+
+static int vpn_connect(struct vpn_provider *provider)
+{
+ struct vpn_data *data = vpn_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 = vpn_provider_ref(provider);
+ data->watch = 0;
+ data->flags = 0;
+ data->task = NULL;
+ data->state = VPN_STATE_IDLE;
+
+ vpn_provider_set_data(provider, data);
+
+ name = vpn_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) {
+ 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 == 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:
+ 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;
+}
+
+static int vpn_probe(struct vpn_provider *provider)
+{
+ return 0;
+}
+
+static int vpn_disconnect(struct vpn_provider *provider)
+{
+ struct vpn_data *data = vpn_provider_get_data(provider);
+ struct vpn_driver_data *vpn_driver_data;
+ const char *name;
+
+ DBG("disconnect provider %p:", provider);
+
+ if (data == NULL)
+ return 0;
+
+ name = vpn_provider_get_driver_name(provider);
+ if (name == NULL)
+ return 0;
+
+ vpn_driver_data = g_hash_table_lookup(driver_hash, name);
+ if (vpn_driver_data->vpn_driver->disconnect)
+ vpn_driver_data->vpn_driver->disconnect();
+
+ if (data->watch != 0) {
+ vpn_provider_unref(provider);
+ vpn_rtnl_remove_watch(data->watch);
+ data->watch = 0;
+ }
+
+ data->state = VPN_STATE_DISCONNECT;
+ connman_task_stop(data->task);
+
+ return 0;
+}
+
+static int vpn_remove(struct vpn_provider *provider)
+{
+ struct vpn_data *data;
+
+ data = vpn_provider_get_data(provider);
+ if (data == NULL)
+ return 0;
+
+ if (data->watch != 0) {
+ vpn_provider_unref(provider);
+ vpn_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_save(struct vpn_provider *provider, GKeyFile *keyfile)
+{
+ struct vpn_driver_data *vpn_driver_data;
+ const char *name;
+
+ name = vpn_provider_get_driver_name(provider);
+ vpn_driver_data = g_hash_table_lookup(driver_hash, name);
+ if (vpn_driver_data != NULL &&
+ vpn_driver_data->vpn_driver->save != NULL)
+ return vpn_driver_data->vpn_driver->save(provider, keyfile);
+
+ return 0;
+}
+
+int vpn_register(const char *name, struct vpn_driver *vpn_driver,
+ const char *program)
+{
+ struct vpn_driver_data *data;
+
+ data = g_try_new0(struct vpn_driver_data, 1);
+ if (data == NULL)
+ return -ENOMEM;
+
+ data->name = name;
+ data->program = program;
+
+ data->vpn_driver = vpn_driver;
+
+ data->provider_driver.name = name;
+ data->provider_driver.disconnect = vpn_disconnect;
+ data->provider_driver.connect = vpn_connect;
+ data->provider_driver.probe = vpn_probe;
+ data->provider_driver.remove = vpn_remove;
+ data->provider_driver.save = vpn_save;
+
+ if (driver_hash == NULL)
+ driver_hash = g_hash_table_new_full(g_str_hash,
+ g_str_equal,
+ NULL, g_free);
+
+ if (driver_hash == NULL) {
+ connman_error("driver_hash not initialized for %s", name);
+ g_free(data);
+ return -ENOMEM;
+ }
+
+ g_hash_table_replace(driver_hash, (char *)name, data);
+
+ vpn_provider_driver_register(&data->provider_driver);
+
+ return 0;
+}
+
+void vpn_unregister(const char *name)
+{
+ struct vpn_driver_data *data;
+
+ data = g_hash_table_lookup(driver_hash, name);
+ if (data == NULL)
+ return;
+
+ vpn_provider_driver_unregister(&data->provider_driver);
+
+ g_hash_table_remove(driver_hash, name);
+
+ if (g_hash_table_size(driver_hash) == 0)
+ g_hash_table_destroy(driver_hash);
+}