/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* NetworkManager -- Network link manager * * Dan Williams * Sjoerd Simons * Daniel Drake * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA. * * (C) Copyright 2005 - 2011 Red Hat, Inc. * (C) Copyright 2008 Collabora Ltd. * (C) Copyright 2009 One Laptop per Child */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nm-device.h" #include "nm-device-wifi.h" #include "nm-device-olpc-mesh.h" #include "nm-device-private.h" #include "nm-utils.h" #include "nm-logging.h" #include "NetworkManagerUtils.h" #include "nm-activation-request.h" #include "nm-properties-changed-signal.h" #include "nm-setting-connection.h" #include "nm-setting-olpc-mesh.h" #include "nm-system.h" #include "nm-manager.h" #include "nm-enum-types.h" #include "wifi-utils.h" /* This is a bug; but we can't really change API now... */ #include "NetworkManagerVPN.h" #include "nm-device-olpc-mesh-glue.h" G_DEFINE_TYPE (NMDeviceOlpcMesh, nm_device_olpc_mesh, NM_TYPE_DEVICE) #define NM_DEVICE_OLPC_MESH_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_DEVICE_OLPC_MESH, NMDeviceOlpcMeshPrivate)) enum { PROP_0, PROP_HW_ADDRESS, PROP_COMPANION, PROP_ACTIVE_CHANNEL, LAST_PROP }; enum { PROPERTIES_CHANGED, LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0 }; #define NM_OLPC_MESH_ERROR (nm_olpc_mesh_error_quark ()) struct _NMDeviceOlpcMeshPrivate { gboolean dispose_has_run; struct ether_addr hw_addr; GByteArray * ssid; WifiData * wifi_data; gboolean up; NMDevice * companion; gboolean stage1_waiting; guint device_added_id; }; static GQuark nm_olpc_mesh_error_quark (void) { static GQuark quark = 0; if (!quark) quark = g_quark_from_static_string ("nm-mesh-error"); return quark; } static guint32 real_get_generic_capabilities (NMDevice *dev) { return NM_DEVICE_CAP_NM_SUPPORTED; } static void nm_device_olpc_mesh_init (NMDeviceOlpcMesh * self) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); priv->dispose_has_run = FALSE; priv->companion = NULL; priv->stage1_waiting = FALSE; memset (&(priv->hw_addr), 0, sizeof (struct ether_addr)); } static GObject* constructor (GType type, guint n_construct_params, GObjectConstructParam *construct_params) { GObject *object; GObjectClass *klass; NMDeviceOlpcMesh *self; NMDeviceOlpcMeshPrivate *priv; klass = G_OBJECT_CLASS (nm_device_olpc_mesh_parent_class); object = klass->constructor (type, n_construct_params, construct_params); if (!object) return NULL; self = NM_DEVICE_OLPC_MESH (object); priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); nm_log_dbg (LOGD_HW | LOGD_OLPC_MESH, "(%s): kernel ifindex %d", nm_device_get_iface (NM_DEVICE (self)), nm_device_get_ifindex (NM_DEVICE (self))); priv->wifi_data = wifi_utils_init (nm_device_get_iface (NM_DEVICE (self)), nm_device_get_ifindex (NM_DEVICE (self)), FALSE); if (priv->wifi_data == NULL) { nm_log_warn (LOGD_HW | LOGD_OLPC_MESH, "(%s): failed to initialize WiFi driver", nm_device_get_iface (NM_DEVICE (self))); g_object_unref (object); return NULL; } /* shorter timeout for mesh connectivity */ nm_device_set_dhcp_timeout (NM_DEVICE (self), 20); return object; } static gboolean real_hw_is_up (NMDevice *device) { return nm_system_iface_is_up (nm_device_get_ip_ifindex (device)); } static gboolean real_hw_bring_up (NMDevice *dev, gboolean *no_firmware) { return nm_system_iface_set_up (nm_device_get_ip_ifindex (dev), TRUE, no_firmware); } static void real_hw_take_down (NMDevice *dev) { nm_system_iface_set_up (nm_device_get_ip_ifindex (dev), FALSE, NULL); } static gboolean real_is_up (NMDevice *device) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (device); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); return priv->up; } static gboolean real_bring_up (NMDevice *dev) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (dev); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); priv->up = TRUE; return TRUE; } static void device_cleanup (NMDeviceOlpcMesh *self) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); if (priv->ssid) { g_byte_array_free (priv->ssid, TRUE); priv->ssid = NULL; } priv->up = FALSE; } static void real_take_down (NMDevice *dev) { device_cleanup (NM_DEVICE_OLPC_MESH (dev)); } static gboolean real_check_connection_compatible (NMDevice *device, NMConnection *connection, GError **error) { NMSettingConnection *s_con; NMSettingOlpcMesh *s_mesh; s_con = nm_connection_get_setting_connection (connection); g_assert (s_con); if (strcmp (nm_setting_connection_get_connection_type (s_con), NM_SETTING_OLPC_MESH_SETTING_NAME)) { g_set_error (error, NM_OLPC_MESH_ERROR, NM_OLPC_MESH_ERROR_CONNECTION_NOT_MESH, "The connection was not a Mesh connection."); return FALSE; } s_mesh = nm_connection_get_setting_olpc_mesh (connection); if (!s_mesh) { g_set_error (error, NM_OLPC_MESH_ERROR, NM_OLPC_MESH_ERROR_CONNECTION_INVALID, "The connection was not a valid Mesh connection."); return FALSE; } return TRUE; } #define DEFAULT_SSID "olpc-mesh" static gboolean real_complete_connection (NMDevice *device, NMConnection *connection, const char *specific_object, const GSList *existing_connections, GError **error) { NMSettingOlpcMesh *s_mesh; GByteArray *tmp; s_mesh = nm_connection_get_setting_olpc_mesh (connection); if (!s_mesh) { s_mesh = (NMSettingOlpcMesh *) nm_setting_olpc_mesh_new (); nm_connection_add_setting (connection, NM_SETTING (s_mesh)); } if (!nm_setting_olpc_mesh_get_ssid (s_mesh)) { tmp = g_byte_array_sized_new (strlen (DEFAULT_SSID)); g_byte_array_append (tmp, (const guint8 *) DEFAULT_SSID, strlen (DEFAULT_SSID)); g_object_set (G_OBJECT (s_mesh), NM_SETTING_OLPC_MESH_SSID, tmp, NULL); g_byte_array_free (tmp, TRUE); } if (!nm_setting_olpc_mesh_get_dhcp_anycast_address (s_mesh)) { const guint8 anycast[ETH_ALEN] = { 0xC0, 0x27, 0xC0, 0x27, 0xC0, 0x27 }; tmp = g_byte_array_sized_new (ETH_ALEN); g_byte_array_append (tmp, anycast, sizeof (anycast)); g_object_set (G_OBJECT (s_mesh), NM_SETTING_OLPC_MESH_DHCP_ANYCAST_ADDRESS, tmp, NULL); g_byte_array_free (tmp, TRUE); } nm_utils_complete_generic (connection, NM_SETTING_OLPC_MESH_SETTING_NAME, existing_connections, _("Mesh %d"), NULL, FALSE); /* No IPv6 by default */ return TRUE; } /* * nm_device_olpc_mesh_get_address * * Get a device's hardware address * */ static void nm_device_olpc_mesh_get_address (NMDeviceOlpcMesh *self, struct ether_addr *addr) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); g_return_if_fail (self != NULL); g_return_if_fail (addr != NULL); memcpy (addr, &(priv->hw_addr), sizeof (struct ether_addr)); } /****************************************************************************/ static void real_update_hw_address (NMDevice *dev) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (dev); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); struct ifreq req; int ret, fd; fd = socket (PF_INET, SOCK_DGRAM, 0); if (fd < 0) { nm_log_warn (LOGD_OLPC_MESH, "could not open control socket."); return; } memset (&req, 0, sizeof (struct ifreq)); strncpy (req.ifr_name, nm_device_get_iface (dev), IFNAMSIZ); ret = ioctl (fd, SIOCGIFHWADDR, &req); if (ret) { nm_log_warn (LOGD_OLPC_MESH, "(%s): error getting hardware address: %d", nm_device_get_iface (dev), errno); goto out; } if (memcmp (&priv->hw_addr, &req.ifr_hwaddr.sa_data, sizeof (struct ether_addr))) { memcpy (&priv->hw_addr, &req.ifr_hwaddr.sa_data, sizeof (struct ether_addr)); g_object_notify (G_OBJECT (dev), NM_DEVICE_OLPC_MESH_HW_ADDRESS); } out: close (fd); } static NMActStageReturn real_act_stage1_prepare (NMDevice *dev, NMDeviceStateReason *reason) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (dev); gboolean scanning; /* disconnect companion device, if it is connected */ if (nm_device_get_act_request (NM_DEVICE (priv->companion))) { nm_log_info (LOGD_OLPC_MESH, "(%s): disconnecting companion device %s", nm_device_get_iface (dev), nm_device_get_iface (priv->companion)); /* FIXME: VPN stuff here is a bug; but we can't really change API now... */ nm_device_state_changed (NM_DEVICE (priv->companion), NM_DEVICE_STATE_DISCONNECTED, NM_VPN_CONNECTION_STATE_REASON_USER_DISCONNECTED); nm_log_info (LOGD_OLPC_MESH, "(%s): companion %s disconnected", nm_device_get_iface (dev), nm_device_get_iface (priv->companion)); } /* wait with continuing configuration untill the companion device is done scanning */ g_object_get (priv->companion, "scanning", &scanning, NULL); if (scanning) { priv->stage1_waiting = TRUE; return NM_ACT_STAGE_RETURN_POSTPONE; } return NM_ACT_STAGE_RETURN_SUCCESS; } static void _mesh_set_channel (NMDeviceOlpcMesh *self, guint32 channel) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); if (wifi_utils_get_mesh_channel (priv->wifi_data) != channel) { if (wifi_utils_set_mesh_channel (priv->wifi_data, channel)) g_object_notify (G_OBJECT (self), NM_DEVICE_OLPC_MESH_ACTIVE_CHANNEL); } } static NMActStageReturn real_act_stage2_config (NMDevice *dev, NMDeviceStateReason *reason) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (dev); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); NMConnection *connection; NMSettingOlpcMesh *s_mesh; guint32 channel; const GByteArray *anycast_addr_array; guint8 *anycast_addr = NULL; connection = nm_device_get_connection (dev); g_assert (connection); s_mesh = nm_connection_get_setting_olpc_mesh (connection); g_assert (s_mesh); channel = nm_setting_olpc_mesh_get_channel (s_mesh); if (channel != 0) _mesh_set_channel (self, channel); wifi_utils_set_mesh_ssid (priv->wifi_data, nm_setting_olpc_mesh_get_ssid (s_mesh)); anycast_addr_array = nm_setting_olpc_mesh_get_dhcp_anycast_address (s_mesh); if (anycast_addr_array) anycast_addr = anycast_addr_array->data; nm_device_set_dhcp_anycast_address (dev, anycast_addr); return NM_ACT_STAGE_RETURN_SUCCESS; } static void dispose (GObject *object) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (object); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); NMManager *manager; if (priv->dispose_has_run) { G_OBJECT_CLASS (nm_device_olpc_mesh_parent_class)->dispose (object); return; } priv->dispose_has_run = TRUE; if (priv->wifi_data) wifi_utils_deinit (priv->wifi_data); device_cleanup (self); manager = nm_manager_get (); if (priv->device_added_id) g_signal_handler_disconnect (manager, priv->device_added_id); g_object_unref (manager); G_OBJECT_CLASS (nm_device_olpc_mesh_parent_class)->dispose (object); } static void get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { NMDeviceOlpcMesh *device = NM_DEVICE_OLPC_MESH (object); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (device); struct ether_addr hw_addr; switch (prop_id) { case PROP_HW_ADDRESS: nm_device_olpc_mesh_get_address (device, &hw_addr); g_value_take_string (value, nm_utils_hwaddr_ntoa (&hw_addr, ARPHRD_ETHER)); break; case PROP_COMPANION: if (priv->companion) g_value_set_boxed (value, nm_device_get_path (priv->companion)); else g_value_set_boxed (value, "/"); break; case PROP_ACTIVE_CHANNEL: g_value_set_uint (value, wifi_utils_get_mesh_channel (priv->wifi_data)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { switch (prop_id) { default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void nm_device_olpc_mesh_class_init (NMDeviceOlpcMeshClass *klass) { GObjectClass *object_class = G_OBJECT_CLASS (klass); NMDeviceClass *parent_class = NM_DEVICE_CLASS (klass); g_type_class_add_private (object_class, sizeof (NMDeviceOlpcMeshPrivate)); object_class->constructor = constructor; object_class->get_property = get_property; object_class->set_property = set_property; object_class->dispose = dispose; parent_class->get_type_capabilities = NULL; parent_class->get_generic_capabilities = real_get_generic_capabilities; parent_class->hw_is_up = real_hw_is_up; parent_class->hw_bring_up = real_hw_bring_up; parent_class->hw_take_down = real_hw_take_down; parent_class->is_up = real_is_up; parent_class->bring_up = real_bring_up; parent_class->take_down = real_take_down; parent_class->update_hw_address = real_update_hw_address; parent_class->check_connection_compatible = real_check_connection_compatible; parent_class->complete_connection = real_complete_connection; parent_class->act_stage1_prepare = real_act_stage1_prepare; parent_class->act_stage2_config = real_act_stage2_config; /* Properties */ g_object_class_install_property (object_class, PROP_HW_ADDRESS, g_param_spec_string (NM_DEVICE_OLPC_MESH_HW_ADDRESS, "MAC Address", "Hardware MAC address", NULL, G_PARAM_READABLE)); g_object_class_install_property (object_class, PROP_COMPANION, g_param_spec_boxed (NM_DEVICE_OLPC_MESH_COMPANION, "Companion device", "Companion device object path", DBUS_TYPE_G_OBJECT_PATH, G_PARAM_READABLE)); g_object_class_install_property (object_class, PROP_ACTIVE_CHANNEL, g_param_spec_uint (NM_DEVICE_OLPC_MESH_ACTIVE_CHANNEL, "Active channel", "Active channel", 0, G_MAXUINT32, 0, G_PARAM_READABLE)); signals[PROPERTIES_CHANGED] = nm_properties_changed_signal_new (object_class, G_STRUCT_OFFSET (NMDeviceOlpcMeshClass, properties_changed)); dbus_g_object_type_install_info (G_TYPE_FROM_CLASS (klass), &dbus_glib_nm_device_olpc_mesh_object_info); dbus_g_error_domain_register (NM_OLPC_MESH_ERROR, NULL, NM_TYPE_OLPC_MESH_ERROR); } static void companion_notify_cb (NMDeviceWifi *companion, GParamSpec *pspec, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); gboolean scanning; if (!priv->stage1_waiting) return; g_object_get (companion, "scanning", &scanning, NULL); if (!scanning) { priv->stage1_waiting = FALSE; nm_device_activate_schedule_stage2_device_config (NM_DEVICE (self)); } } /* disconnect from mesh if someone starts using the companion */ static void companion_state_changed_cb (NMDeviceWifi *companion, NMDeviceState state, NMDeviceState old_state, NMDeviceStateReason reason, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); NMDeviceState self_state = nm_device_get_state (NM_DEVICE (self)); if ( self_state < NM_DEVICE_STATE_PREPARE || self_state > NM_DEVICE_STATE_ACTIVATED || state < NM_DEVICE_STATE_PREPARE || state > NM_DEVICE_STATE_ACTIVATED) return; nm_log_dbg (LOGD_OLPC_MESH, "(%s): disconnecting mesh due to companion connectivity", nm_device_get_iface (NM_DEVICE (self))); /* FIXME: VPN stuff here is a bug; but we can't really change API now... */ nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_DISCONNECTED, NM_VPN_CONNECTION_STATE_REASON_USER_DISCONNECTED); } static gboolean companion_scan_allowed_cb (NMDeviceWifi *companion, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); NMDeviceState state = nm_device_get_state (NM_DEVICE (self)); /* Don't allow the companion to scan while configuring the mesh interface */ return (state < NM_DEVICE_STATE_PREPARE) || (state > NM_DEVICE_STATE_IP_CONFIG); } static gboolean companion_autoconnect_allowed_cb (NMDeviceWifi *companion, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); NMDeviceState state = nm_device_get_state (NM_DEVICE (self)); /* Don't allow the companion to autoconnect while a mesh connection is * active */ return (state < NM_DEVICE_STATE_PREPARE) || (state > NM_DEVICE_STATE_ACTIVATED); } static gboolean is_companion (NMDeviceOlpcMesh *self, NMDevice *other) { NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); struct ether_addr their_addr; NMManager *manager; if (!NM_IS_DEVICE_WIFI (other)) return FALSE; nm_device_wifi_get_address (NM_DEVICE_WIFI (other), &their_addr); if (memcmp (priv->hw_addr.ether_addr_octet, their_addr.ether_addr_octet, ETH_ALEN) != 0) { return FALSE; } /* FIXME detect when our companion leaves */ priv->companion = other; /* When we've found the companion, stop listening for other devices */ manager = nm_manager_get (); if (priv->device_added_id) { g_signal_handler_disconnect (manager, priv->device_added_id); priv->device_added_id = 0; } g_object_unref (manager); nm_device_state_changed (NM_DEVICE (self), NM_DEVICE_STATE_DISCONNECTED, NM_DEVICE_STATE_REASON_NONE); nm_log_info (LOGD_OLPC_MESH, "(%s): found companion WiFi device %s", nm_device_get_iface (NM_DEVICE (self)), nm_device_get_iface (other)); g_signal_connect (G_OBJECT (other), "state-changed", G_CALLBACK (companion_state_changed_cb), self); g_signal_connect (G_OBJECT (other), "notify::scanning", G_CALLBACK (companion_notify_cb), self); g_signal_connect (G_OBJECT (other), "scanning-allowed", G_CALLBACK (companion_scan_allowed_cb), self); g_signal_connect (G_OBJECT (other), "autoconnect-allowed", G_CALLBACK (companion_autoconnect_allowed_cb), self); g_object_notify (G_OBJECT (self), NM_DEVICE_OLPC_MESH_COMPANION); return TRUE; } static void device_added_cb (NMManager *manager, NMDevice *other, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); is_companion (self, other); } static gboolean check_companion_cb (gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (user_data); NMDeviceOlpcMeshPrivate *priv = NM_DEVICE_OLPC_MESH_GET_PRIVATE (self); NMManager *manager; GSList *list; if (priv->companion != NULL) { nm_device_state_changed (NM_DEVICE (user_data), NM_DEVICE_STATE_DISCONNECTED, NM_DEVICE_STATE_REASON_NONE); return FALSE; } if (priv->device_added_id != 0) return FALSE; manager = nm_manager_get (); priv->device_added_id = g_signal_connect (manager, "device-added", G_CALLBACK (device_added_cb), self); /* Try to find the companion if it's already known to the NMManager */ for (list = nm_manager_get_devices (manager); list ; list = g_slist_next (list)) { if (is_companion (self, NM_DEVICE (list->data))) break; } g_object_unref (manager); return FALSE; } static void state_changed_cb (NMDevice *device, NMDeviceState state, gpointer user_data) { NMDeviceOlpcMesh *self = NM_DEVICE_OLPC_MESH (device); switch (state) { case NM_DEVICE_STATE_UNMANAGED: break; case NM_DEVICE_STATE_UNAVAILABLE: /* If transitioning to UNAVAILBLE and the companion device is known then * transition to DISCONNECTED otherwise wait for our companion. */ g_idle_add (check_companion_cb, self); break; case NM_DEVICE_STATE_ACTIVATED: break; case NM_DEVICE_STATE_FAILED: break; case NM_DEVICE_STATE_DISCONNECTED: break; default: break; } } NMDevice * nm_device_olpc_mesh_new (const char *udi, const char *iface, const char *driver) { GObject *obj; g_return_val_if_fail (udi != NULL, NULL); g_return_val_if_fail (iface != NULL, NULL); g_return_val_if_fail (driver != NULL, NULL); obj = g_object_new (NM_TYPE_DEVICE_OLPC_MESH, NM_DEVICE_UDI, udi, NM_DEVICE_IFACE, iface, NM_DEVICE_DRIVER, driver, NM_DEVICE_TYPE_DESC, "802.11 OLPC Mesh", NM_DEVICE_DEVICE_TYPE, NM_DEVICE_TYPE_OLPC_MESH, NULL); if (obj == NULL) return NULL; g_signal_connect (obj, "state-changed", G_CALLBACK (state_changed_cb), NULL); return NM_DEVICE (obj); }