/* -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ /* NetworkManager system settings service * * Søren Sandmann * Dan Williams * Tambet Ingo * * 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 2007 - 2011 Red Hat, Inc. * (C) Copyright 2008 Novell, Inc. */ #include "config.h" #include #include #include #include #include #include #include #include #if HAVE_SELINUX #include #endif #include "gsystem-local-alloc.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "nm-core-internal.h" #include "nm-device-ethernet.h" #include "nm-dbus-glib-types.h" #include "nm-settings.h" #include "nm-settings-connection.h" #include "nm-system-config-interface.h" #include "nm-logging.h" #include "nm-dbus-manager.h" #include "nm-auth-utils.h" #include "nm-auth-subject.h" #include "nm-session-monitor.h" #include "plugins/keyfile/plugin.h" #include "nm-agent-manager.h" #include "nm-connection-provider.h" #include "nm-config.h" #include "NetworkManagerUtils.h" #define LOG(level, ...) \ G_STMT_START { \ nm_log ((level), LOGD_CORE, \ "settings: " _NM_UTILS_MACRO_FIRST(__VA_ARGS__) \ _NM_UTILS_MACRO_REST(__VA_ARGS__)); \ } G_STMT_END /* LINKER CRACKROCK */ #define EXPORT(sym) void * __export_##sym = &sym; #include "nm-inotify-helper.h" EXPORT(nm_inotify_helper_get_type) EXPORT(nm_inotify_helper_get) EXPORT(nm_inotify_helper_add_watch) EXPORT(nm_inotify_helper_remove_watch) EXPORT(nm_settings_connection_get_type) EXPORT(nm_settings_connection_replace_settings) EXPORT(nm_settings_connection_replace_and_commit) /* END LINKER CRACKROCK */ #define HOSTNAME_FILE_DEFAULT "/etc/hostname" #define HOSTNAME_FILE_SUSE "/etc/HOSTNAME" #define HOSTNAME_FILE_GENTOO "/etc/conf.d/hostname" #define IFCFG_DIR SYSCONFDIR "/sysconfig/network" #define CONF_DHCP IFCFG_DIR "/dhcp" #if defined(HOSTNAME_PERSIST_SUSE) #define HOSTNAME_FILE HOSTNAME_FILE_SUSE #elif defined(HOSTNAME_PERSIST_GENTOO) #define HOSTNAME_FILE HOSTNAME_FILE_GENTOO #else #define HOSTNAME_FILE HOSTNAME_FILE_DEFAULT #endif static void claim_connection (NMSettings *self, NMSettingsConnection *connection); static gboolean impl_settings_list_connections (NMSettings *self, GPtrArray **connections, GError **error); static void impl_settings_get_connection_by_uuid (NMSettings *self, const char *uuid, DBusGMethodInvocation *context); static void impl_settings_add_connection (NMSettings *self, GHashTable *settings, DBusGMethodInvocation *context); static void impl_settings_add_connection_unsaved (NMSettings *self, GHashTable *settings, DBusGMethodInvocation *context); static void impl_settings_load_connections (NMSettings *self, char **filenames, DBusGMethodInvocation *context); static void impl_settings_reload_connections (NMSettings *self, DBusGMethodInvocation *context); static void impl_settings_save_hostname (NMSettings *self, const char *hostname, DBusGMethodInvocation *context); #include "nm-settings-glue.h" static void unmanaged_specs_changed (NMSystemConfigInterface *config, gpointer user_data); static void unrecognized_specs_changed (NMSystemConfigInterface *config, gpointer user_data); static void connection_provider_init (NMConnectionProvider *cp_class); G_DEFINE_TYPE_EXTENDED (NMSettings, nm_settings, G_TYPE_OBJECT, 0, G_IMPLEMENT_INTERFACE (NM_TYPE_CONNECTION_PROVIDER, connection_provider_init)) typedef struct { NMDBusManager *dbus_mgr; NMAgentManager *agent_mgr; NMConfig *config; GSList *auths; GSList *plugins; gboolean connections_loaded; GHashTable *connections; GSList *unmanaged_specs; GSList *unrecognized_specs; GSList *get_connections_cache; gboolean startup_complete; struct { char *value; char *file; GFileMonitor *monitor; GFileMonitor *dhcp_monitor; guint monitor_id; guint dhcp_monitor_id; } hostname; } NMSettingsPrivate; #define NM_SETTINGS_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), NM_TYPE_SETTINGS, NMSettingsPrivate)) enum { PROPERTIES_CHANGED, CONNECTION_ADDED, CONNECTION_UPDATED, CONNECTION_UPDATED_BY_USER, CONNECTION_REMOVED, CONNECTION_VISIBILITY_CHANGED, AGENT_REGISTERED, NEW_CONNECTION, /* exported, not used internally */ LAST_SIGNAL }; static guint signals[LAST_SIGNAL] = { 0 }; enum { PROP_0, PROP_UNMANAGED_SPECS, PROP_HOSTNAME, PROP_CAN_MODIFY, PROP_CONNECTIONS, PROP_STARTUP_COMPLETE, LAST_PROP }; static void check_startup_complete (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GHashTableIter iter; NMSettingsConnection *conn; if (priv->startup_complete) return; g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &conn)) { if (!nm_settings_connection_get_ready (conn)) return; } priv->startup_complete = TRUE; g_object_notify (G_OBJECT (self), NM_SETTINGS_STARTUP_COMPLETE); } static void connection_ready_changed (NMSettingsConnection *conn, GParamSpec *pspec, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); if (nm_settings_connection_get_ready (conn)) check_startup_complete (self); } static void plugin_connection_added (NMSystemConfigInterface *config, NMSettingsConnection *connection, gpointer user_data) { claim_connection (NM_SETTINGS (user_data), connection); } static void load_connections (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *iter; for (iter = priv->plugins; iter; iter = g_slist_next (iter)) { NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data); GSList *plugin_connections; GSList *elt; plugin_connections = nm_system_config_interface_get_connections (plugin); // FIXME: ensure connections from plugins loaded with a lower priority // get rejected when they conflict with connections from a higher // priority plugin. for (elt = plugin_connections; elt; elt = g_slist_next (elt)) claim_connection (self, NM_SETTINGS_CONNECTION (elt->data)); g_slist_free (plugin_connections); g_signal_connect (plugin, NM_SYSTEM_CONFIG_INTERFACE_CONNECTION_ADDED, G_CALLBACK (plugin_connection_added), self); g_signal_connect (plugin, NM_SYSTEM_CONFIG_INTERFACE_UNMANAGED_SPECS_CHANGED, G_CALLBACK (unmanaged_specs_changed), self); g_signal_connect (plugin, NM_SYSTEM_CONFIG_INTERFACE_UNRECOGNIZED_SPECS_CHANGED, G_CALLBACK (unrecognized_specs_changed), self); } priv->connections_loaded = TRUE; unmanaged_specs_changed (NULL, self); unrecognized_specs_changed (NULL, self); } void nm_settings_for_each_connection (NMSettings *self, NMSettingsForEachFunc for_each_func, gpointer user_data) { NMSettingsPrivate *priv; GHashTableIter iter; gpointer data; g_return_if_fail (NM_IS_SETTINGS (self)); g_return_if_fail (for_each_func != NULL); priv = NM_SETTINGS_GET_PRIVATE (self); g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, &data)) for_each_func (self, NM_SETTINGS_CONNECTION (data), user_data); } static gboolean impl_settings_list_connections (NMSettings *self, GPtrArray **connections, GError **error) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GHashTableIter iter; gpointer key; *connections = g_ptr_array_sized_new (g_hash_table_size (priv->connections) + 1); g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, &key, NULL)) g_ptr_array_add (*connections, g_strdup ((const char *) key)); return TRUE; } NMSettingsConnection * nm_settings_get_connection_by_uuid (NMSettings *self, const char *uuid) { NMSettingsPrivate *priv; NMSettingsConnection *candidate; GHashTableIter iter; g_return_val_if_fail (NM_IS_SETTINGS (self), NULL); g_return_val_if_fail (uuid != NULL, NULL); priv = NM_SETTINGS_GET_PRIVATE (self); g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, (gpointer) &candidate)) { if (g_strcmp0 (uuid, nm_connection_get_uuid (NM_CONNECTION (candidate))) == 0) return candidate; } return NULL; } static void impl_settings_get_connection_by_uuid (NMSettings *self, const char *uuid, DBusGMethodInvocation *context) { NMSettingsConnection *connection = NULL; NMAuthSubject *subject = NULL; GError *error = NULL; char *error_desc = NULL; connection = nm_settings_get_connection_by_uuid (self, uuid); if (!connection) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION, "No connection with the UUID was found."); goto error; } subject = nm_auth_subject_new_unix_process_from_context (context); if (!subject) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Unable to determine UID of request."); goto error; } if (!nm_auth_is_subject_in_acl (NM_CONNECTION (connection), subject, &error_desc)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, error_desc); g_free (error_desc); goto error; } g_clear_object (&subject); dbus_g_method_return (context, nm_connection_get_path (NM_CONNECTION (connection))); return; error: g_assert (error); dbus_g_method_return_error (context, error); g_error_free (error); g_clear_object (&subject); } static int connection_sort (gconstpointer pa, gconstpointer pb) { NMConnection *a = NM_CONNECTION (pa); NMSettingConnection *con_a; NMConnection *b = NM_CONNECTION (pb); NMSettingConnection *con_b; guint64 ts_a = 0, ts_b = 0; gboolean can_ac_a, can_ac_b; con_a = nm_connection_get_setting_connection (a); g_assert (con_a); con_b = nm_connection_get_setting_connection (b); g_assert (con_b); can_ac_a = !!nm_setting_connection_get_autoconnect (con_a); can_ac_b = !!nm_setting_connection_get_autoconnect (con_b); if (can_ac_a != can_ac_b) return can_ac_a ? -1 : 1; nm_settings_connection_get_timestamp (NM_SETTINGS_CONNECTION (pa), &ts_a); nm_settings_connection_get_timestamp (NM_SETTINGS_CONNECTION (pb), &ts_b); if (ts_a > ts_b) return -1; else if (ts_a == ts_b) return 0; return 1; } /* Returns a list of NMSettingsConnections. * The list is sorted in the order suitable for auto-connecting, i.e. * first go connections with autoconnect=yes and most recent timestamp. * Caller must free the list with g_slist_free(). */ GSList * nm_settings_get_connections (NMSettings *self) { GHashTableIter iter; gpointer data = NULL; GSList *list = NULL; g_return_val_if_fail (NM_IS_SETTINGS (self), NULL); g_hash_table_iter_init (&iter, NM_SETTINGS_GET_PRIVATE (self)->connections); while (g_hash_table_iter_next (&iter, NULL, &data)) list = g_slist_insert_sorted (list, data, connection_sort); return list; } NMSettingsConnection * nm_settings_get_connection_by_path (NMSettings *self, const char *path) { NMSettingsPrivate *priv; g_return_val_if_fail (NM_IS_SETTINGS (self), NULL); g_return_val_if_fail (path != NULL, NULL); priv = NM_SETTINGS_GET_PRIVATE (self); return (NMSettingsConnection *) g_hash_table_lookup (priv->connections, path); } static char* uscore_to_wincaps (const char *uscore) { const char *p; GString *str; gboolean last_was_uscore; last_was_uscore = TRUE; str = g_string_new (NULL); p = uscore; while (p && *p) { if (*p == '-' || *p == '_') last_was_uscore = TRUE; else { if (last_was_uscore) { g_string_append_c (str, g_ascii_toupper (*p)); last_was_uscore = FALSE; } else g_string_append_c (str, *p); } ++p; } return g_string_free (str, FALSE); } static void notify (GObject *object, GParamSpec *pspec) { GValue *value; GHashTable *hash; value = g_slice_new0 (GValue); hash = g_hash_table_new_full (g_str_hash, g_str_equal, (GDestroyNotify) g_free, NULL); g_value_init (value, pspec->value_type); g_object_get_property (object, pspec->name, value); g_hash_table_insert (hash, uscore_to_wincaps (pspec->name), value); g_signal_emit (object, signals[PROPERTIES_CHANGED], 0, hash); g_hash_table_destroy (hash); g_value_unset (value); g_slice_free (GValue, value); } gboolean nm_settings_has_connection (NMSettings *self, NMConnection *connection) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GHashTableIter iter; gpointer data; g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, &data)) if (data == connection) return TRUE; return FALSE; } const GSList * nm_settings_get_unmanaged_specs (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); return priv->unmanaged_specs; } static NMSystemConfigInterface * get_plugin (NMSettings *self, guint32 capability) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *iter; g_return_val_if_fail (self != NULL, NULL); /* Do any of the plugins support the given capability? */ for (iter = priv->plugins; iter; iter = iter->next) { NMSystemConfigInterfaceCapabilities caps = NM_SYSTEM_CONFIG_INTERFACE_CAP_NONE; g_object_get (G_OBJECT (iter->data), NM_SYSTEM_CONFIG_INTERFACE_CAPABILITIES, &caps, NULL); if (caps & capability) return NM_SYSTEM_CONFIG_INTERFACE (iter->data); } return NULL; } #if defined(HOSTNAME_PERSIST_GENTOO) static gchar * read_hostname_gentoo (const char *path) { gchar *contents = NULL, *result = NULL, *tmp; gchar **all_lines = NULL; guint line_num, i; if (!g_file_get_contents (path, &contents, NULL, NULL)) return NULL; all_lines = g_strsplit (contents, "\n", 0); line_num = g_strv_length (all_lines); for (i = 0; i < line_num; i++) { g_strstrip (all_lines[i]); if (all_lines[i][0] == '#' || all_lines[i][0] == '\0') continue; if (g_str_has_prefix (all_lines[i], "hostname=")) { tmp = &all_lines[i][STRLEN ("hostname=")]; result = g_shell_unquote (tmp, NULL); break; } } g_strfreev (all_lines); g_free (contents); return result; } #endif #if defined(HOSTNAME_PERSIST_SUSE) static gboolean hostname_is_dynamic (void) { GIOChannel *channel; char *str = NULL; gboolean dynamic = FALSE; channel = g_io_channel_new_file (CONF_DHCP, "r", NULL); if (!channel) return dynamic; while (g_io_channel_read_line (channel, &str, NULL, NULL, NULL) != G_IO_STATUS_EOF) { if (str) { g_strstrip (str); if (g_str_has_prefix (str, "DHCLIENT_SET_HOSTNAME=")) dynamic = strcmp (&str[STRLEN ("DHCLIENT_SET_HOSTNAME=")], "\"yes\"") == 0; g_free (str); } } g_io_channel_shutdown (channel, FALSE, NULL); g_io_channel_unref (channel); return dynamic; } #endif /* Returns an allocated string which the caller owns and must eventually free */ char * nm_settings_get_hostname (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); char *hostname = NULL; #if defined(HOSTNAME_PERSIST_GENTOO) hostname = read_hostname_gentoo (priv->hostname.file); #else #if defined(HOSTNAME_PERSIST_SUSE) if (priv->hostname.dhcp_monitor_id && hostname_is_dynamic ()) return NULL; #endif if (g_file_get_contents (priv->hostname.file, &hostname, NULL, NULL)) g_strchomp (hostname); #endif /* HOSTNAME_PERSIST_GENTOO */ if (hostname && !hostname[0]) { g_free (hostname); hostname = NULL; } return hostname; } static gboolean find_spec (GSList *spec_list, const char *spec) { GSList *iter; for (iter = spec_list; iter; iter = g_slist_next (iter)) { if (!strcmp ((const char *) iter->data, spec)) return TRUE; } return FALSE; } static void update_specs (NMSettings *self, GSList **specs_ptr, GSList * (*get_specs_func) (NMSystemConfigInterface *)) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *iter; g_slist_free_full (*specs_ptr, g_free); *specs_ptr = NULL; for (iter = priv->plugins; iter; iter = g_slist_next (iter)) { GSList *specs, *specs_iter; specs = get_specs_func (NM_SYSTEM_CONFIG_INTERFACE (iter->data)); for (specs_iter = specs; specs_iter; specs_iter = specs_iter->next) { if (!find_spec (*specs_ptr, (const char *) specs_iter->data)) { *specs_ptr = g_slist_prepend (*specs_ptr, specs_iter->data); } else g_free (specs_iter->data); } g_slist_free (specs); } } static void unmanaged_specs_changed (NMSystemConfigInterface *config, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); update_specs (self, &priv->unmanaged_specs, nm_system_config_interface_get_unmanaged_specs); g_object_notify (G_OBJECT (self), NM_SETTINGS_UNMANAGED_SPECS); } static void unrecognized_specs_changed (NMSystemConfigInterface *config, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); update_specs (self, &priv->unrecognized_specs, nm_system_config_interface_get_unrecognized_specs); } static void add_plugin (NMSettings *self, NMSystemConfigInterface *plugin) { NMSettingsPrivate *priv; char *pname = NULL; char *pinfo = NULL; g_return_if_fail (NM_IS_SETTINGS (self)); g_return_if_fail (NM_IS_SYSTEM_CONFIG_INTERFACE (plugin)); priv = NM_SETTINGS_GET_PRIVATE (self); priv->plugins = g_slist_append (priv->plugins, g_object_ref (plugin)); nm_system_config_interface_init (plugin, NULL); g_object_get (G_OBJECT (plugin), NM_SYSTEM_CONFIG_INTERFACE_NAME, &pname, NM_SYSTEM_CONFIG_INTERFACE_INFO, &pinfo, NULL); nm_log_info (LOGD_SETTINGS, "Loaded settings plugin %s: %s", pname, pinfo); g_free (pname); g_free (pinfo); } static GObject * find_plugin (GSList *list, const char *pname) { GSList *iter; GObject *obj = NULL; g_return_val_if_fail (pname != NULL, NULL); for (iter = list; iter && !obj; iter = g_slist_next (iter)) { NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data); char *list_pname = NULL; g_object_get (G_OBJECT (plugin), NM_SYSTEM_CONFIG_INTERFACE_NAME, &list_pname, NULL); if (list_pname && !strcmp (pname, list_pname)) obj = G_OBJECT (plugin); g_free (list_pname); } return obj; } static void add_keyfile_plugin (NMSettings *self) { GObject *keyfile_plugin; keyfile_plugin = nm_settings_keyfile_plugin_new (); g_assert (keyfile_plugin); add_plugin (self, NM_SYSTEM_CONFIG_INTERFACE (keyfile_plugin)); } static gboolean load_plugins (NMSettings *self, const char **plugins, GError **error) { GSList *list = NULL; const char **iter; gboolean keyfile_added = FALSE; gboolean success = TRUE; for (iter = plugins; iter && *iter; iter++) { GModule *plugin; gs_free char *full_name = NULL; gs_free char *path = NULL; gs_free char *pname = NULL; GObject *obj; GObject * (*factory_func) (void); struct stat st; int errsv; pname = g_strdup (*iter); g_strstrip (pname); if (!*pname) continue; if (!*pname || strchr (pname, '/')) { LOG (LOGL_WARN, "ignore invalid plugin \"%s\"", pname); continue; } obj = find_plugin (list, pname); if (obj) continue; /* keyfile plugin is built-in now */ if (strcmp (pname, "keyfile") == 0) { if (!keyfile_added) { add_keyfile_plugin (self); keyfile_added = TRUE; } continue; } full_name = g_strdup_printf ("nm-settings-plugin-%s", pname); path = g_module_build_path (NMPLUGINDIR, full_name); if (stat (path, &st) != 0) { errsv = errno; LOG (LOGL_WARN, "Could not load plugin '%s' from file '%s': %s", pname, path, strerror (errsv)); continue; } if (!S_ISREG (st.st_mode)) { LOG (LOGL_WARN, "Could not load plugin '%s' from file '%s': not a file", pname, path); continue; } if (st.st_uid != 0) { LOG (LOGL_WARN, "Could not load plugin '%s' from file '%s': file must be owned by root", pname, path); continue; } if (st.st_mode & (S_IWGRP | S_IWOTH | S_ISUID)) { LOG (LOGL_WARN, "Could not load plugin '%s' from file '%s': invalid file permissions", pname, path); continue; } plugin = g_module_open (path, G_MODULE_BIND_LOCAL); if (!plugin) { LOG (LOGL_WARN, "Could not load plugin '%s' from file '%s': %s", pname, full_name, g_module_error ()); continue; } /* errors after this point are fatal, because we loaded the shared library already. */ if (!g_module_symbol (plugin, "nm_system_config_factory", (gpointer) (&factory_func))) { g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "Could not find plugin '%s' factory function.", pname); success = FALSE; break; } obj = (*factory_func) (); if (!obj || !NM_IS_SYSTEM_CONFIG_INTERFACE (obj)) { g_set_error (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "Plugin '%s' returned invalid system config object.", pname); success = FALSE; break; } g_module_make_resident (plugin); g_object_weak_ref (obj, (GWeakNotify) g_module_close, plugin); add_plugin (self, NM_SYSTEM_CONFIG_INTERFACE (obj)); list = g_slist_append (list, obj); } /* If keyfile plugin was not among configured plugins, add it as the last one */ if (!keyfile_added) add_keyfile_plugin (self); g_slist_free_full (list, g_object_unref); return success; } static void connection_updated (NMSettingsConnection *connection, gpointer user_data) { /* Re-emit for listeners like NMPolicy */ g_signal_emit (NM_SETTINGS (user_data), signals[CONNECTION_UPDATED], 0, connection); g_signal_emit_by_name (NM_SETTINGS (user_data), NM_CP_SIGNAL_CONNECTION_UPDATED, connection); } static void connection_updated_by_user (NMSettingsConnection *connection, gpointer user_data) { /* Re-emit for listeners like NMPolicy */ g_signal_emit (NM_SETTINGS (user_data), signals[CONNECTION_UPDATED_BY_USER], 0, connection); } static void connection_visibility_changed (NMSettingsConnection *connection, GParamSpec *pspec, gpointer user_data) { /* Re-emit for listeners like NMPolicy */ g_signal_emit (NM_SETTINGS (user_data), signals[CONNECTION_VISIBILITY_CHANGED], 0, connection); } static void connection_removed (NMSettingsConnection *connection, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); const char *cpath = nm_connection_get_path (NM_CONNECTION (connection)); if (!g_hash_table_lookup (priv->connections, cpath)) g_return_if_reached (); g_object_ref (connection); /* Disconnect signal handlers, as plugins might still keep references * to the connection (and thus the signal handlers would still be live) * even after NMSettings has dropped all its references. */ g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (connection_removed), self); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (connection_updated), self); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (connection_updated_by_user), self); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (connection_visibility_changed), self); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (connection_ready_changed), self); /* Forget about the connection internally */ g_hash_table_remove (priv->connections, (gpointer) cpath); /* Notify D-Bus */ g_signal_emit (self, signals[CONNECTION_REMOVED], 0, connection); /* Re-emit for listeners like NMPolicy */ g_signal_emit_by_name (self, NM_CP_SIGNAL_CONNECTION_REMOVED, connection); g_object_notify (G_OBJECT (self), NM_SETTINGS_CONNECTIONS); check_startup_complete (self); g_object_unref (connection); } static void secret_agent_registered (NMAgentManager *agent_mgr, NMSecretAgent *agent, gpointer user_data) { /* Re-emit for listeners like NMPolicy */ g_signal_emit (NM_SETTINGS (user_data), signals[AGENT_REGISTERED], 0, agent); } #define NM_DBUS_SERVICE_OPENCONNECT "org.freedesktop.NetworkManager.openconnect" #define NM_OPENCONNECT_KEY_GATEWAY "gateway" #define NM_OPENCONNECT_KEY_COOKIE "cookie" #define NM_OPENCONNECT_KEY_GWCERT "gwcert" #define NM_OPENCONNECT_KEY_XMLCONFIG "xmlconfig" #define NM_OPENCONNECT_KEY_LASTHOST "lasthost" #define NM_OPENCONNECT_KEY_AUTOCONNECT "autoconnect" #define NM_OPENCONNECT_KEY_CERTSIGS "certsigs" static void openconnect_migrate_hack (NMConnection *connection) { NMSettingVpn *s_vpn; NMSettingSecretFlags flags = NM_SETTING_SECRET_FLAG_NOT_SAVED; /* Huge hack. There were some openconnect changes that needed to happen * pretty late, too late to get into distros. Migration has already * happened for many people, and their secret flags are wrong. But we * don't want to requrie re-migration, so we have to fix it up here. Ugh. */ s_vpn = nm_connection_get_setting_vpn (connection); if (s_vpn == NULL) return; if (g_strcmp0 (nm_setting_vpn_get_service_type (s_vpn), NM_DBUS_SERVICE_OPENCONNECT) == 0) { /* These are different for every login session, and should not be stored */ nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_GATEWAY, flags, NULL); nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_COOKIE, flags, NULL); nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_GWCERT, flags, NULL); /* These are purely internal data for the auth-dialog, and should be stored */ flags = 0; nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_XMLCONFIG, flags, NULL); nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_LASTHOST, flags, NULL); nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_AUTOCONNECT, flags, NULL); nm_setting_set_secret_flags (NM_SETTING (s_vpn), NM_OPENCONNECT_KEY_CERTSIGS, flags, NULL); } } static void claim_connection (NMSettings *self, NMSettingsConnection *connection) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); static guint32 ec_counter = 0; GError *error = NULL; GHashTableIter iter; gpointer data; char *path; NMSettingsConnection *existing; g_return_if_fail (NM_IS_SETTINGS_CONNECTION (connection)); g_return_if_fail (nm_connection_get_path (NM_CONNECTION (connection)) == NULL); g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, &data)) { /* prevent duplicates */ if (data == connection) return; } if (!nm_connection_normalize (NM_CONNECTION (connection), NULL, NULL, &error)) { nm_log_warn (LOGD_SETTINGS, "plugin provided invalid connection: %s", error->message); g_error_free (error); return; } existing = nm_settings_get_connection_by_uuid (self, nm_connection_get_uuid (NM_CONNECTION (connection))); if (existing) { /* Cannot add duplicate connections per UUID. Just return without action and * log a warning. * * This means, that plugins must not provide duplicate connections (UUID). * In fact, none of the plugins currently would do that. * * But globaly, over different setting plugins, there could be duplicates * without the individual plugins being aware. Don't handle that at all, just * error out. That should not happen unless the admin misconfigured the system * to create conflicting connections. */ nm_log_warn (LOGD_SETTINGS, "plugin provided duplicate connection with UUID %s", nm_connection_get_uuid (NM_CONNECTION (connection))); return; } /* Read timestamp from look-aside file and put it into the connection's data */ nm_settings_connection_read_and_fill_timestamp (connection); /* Read seen-bssids from look-aside file and put it into the connection's data */ nm_settings_connection_read_and_fill_seen_bssids (connection); /* Ensure it's initial visibility is up-to-date */ nm_settings_connection_recheck_visibility (connection); /* Evil openconnect migration hack */ openconnect_migrate_hack (NM_CONNECTION (connection)); g_signal_connect (connection, NM_SETTINGS_CONNECTION_REMOVED, G_CALLBACK (connection_removed), self); g_signal_connect (connection, NM_SETTINGS_CONNECTION_UPDATED, G_CALLBACK (connection_updated), self); g_signal_connect (connection, NM_SETTINGS_CONNECTION_UPDATED_BY_USER, G_CALLBACK (connection_updated_by_user), self); g_signal_connect (connection, "notify::" NM_SETTINGS_CONNECTION_VISIBLE, G_CALLBACK (connection_visibility_changed), self); if (!priv->startup_complete) { g_signal_connect (connection, "notify::" NM_SETTINGS_CONNECTION_READY, G_CALLBACK (connection_ready_changed), self); } /* Export the connection over D-Bus */ g_warn_if_fail (nm_connection_get_path (NM_CONNECTION (connection)) == NULL); path = g_strdup_printf ("%s/%u", NM_DBUS_PATH_SETTINGS, ec_counter++); nm_connection_set_path (NM_CONNECTION (connection), path); nm_dbus_manager_register_object (priv->dbus_mgr, path, G_OBJECT (connection)); g_free (path); g_hash_table_insert (priv->connections, (gpointer) nm_connection_get_path (NM_CONNECTION (connection)), g_object_ref (connection)); nm_utils_log_connection_diff (NM_CONNECTION (connection), NULL, LOGL_DEBUG, LOGD_CORE, "new connection", "++ "); /* Only emit the individual connection-added signal after connections * have been initially loaded. */ if (priv->connections_loaded) { /* Internal added signal */ g_signal_emit (self, signals[CONNECTION_ADDED], 0, connection); g_signal_emit_by_name (self, NM_CP_SIGNAL_CONNECTION_ADDED, connection); g_object_notify (G_OBJECT (self), NM_SETTINGS_CONNECTIONS); /* Exported D-Bus signal */ g_signal_emit (self, signals[NEW_CONNECTION], 0, connection); } } /** * nm_settings_add_connection: * @self: the #NMSettings object * @connection: the source connection to create a new #NMSettingsConnection from * @save_to_disk: %TRUE to save the connection to disk immediately, %FALSE to * not save to disk * @error: on return, a location to store any errors that may occur * * Creates a new #NMSettingsConnection for the given source @connection. * The returned object is owned by @self and the caller must reference * the object to continue using it. * * Returns: the new #NMSettingsConnection or %NULL */ NMSettingsConnection * nm_settings_add_connection (NMSettings *self, NMConnection *connection, gboolean save_to_disk, GError **error) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *iter; NMSettingsConnection *added = NULL; GHashTableIter citer; NMConnection *candidate = NULL; /* Make sure a connection with this UUID doesn't already exist */ g_hash_table_iter_init (&citer, priv->connections); while (g_hash_table_iter_next (&citer, NULL, (gpointer *) &candidate)) { if (g_strcmp0 (nm_connection_get_uuid (connection), nm_connection_get_uuid (candidate)) == 0) { g_set_error_literal (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_UUID_EXISTS, "A connection with this UUID already exists."); return NULL; } } /* 1) plugin writes the NMConnection to disk * 2) plugin creates a new NMSettingsConnection subclass with the settings * from the NMConnection and returns it to the settings service * 3) settings service exports the new NMSettingsConnection subclass * 4) plugin notices that something on the filesystem has changed * 5) plugin reads the changes and ignores them because they will * contain the same data as the connection it already knows about */ for (iter = priv->plugins; iter; iter = g_slist_next (iter)) { NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data); GError *add_error = NULL; added = nm_system_config_interface_add_connection (plugin, connection, save_to_disk, &add_error); if (added) { claim_connection (self, added); return added; } nm_log_dbg (LOGD_SETTINGS, "Failed to add %s/'%s': %s", nm_connection_get_uuid (connection), nm_connection_get_id (connection), add_error ? add_error->message : "(unknown)"); g_clear_error (&add_error); } g_set_error_literal (error, NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "No plugin supported adding this connection"); return NULL; } static NMConnection * _nm_connection_provider_add_connection (NMConnectionProvider *provider, NMConnection *connection, gboolean save_to_disk, GError **error) { g_assert (NM_IS_CONNECTION_PROVIDER (provider) && NM_IS_SETTINGS (provider)); return NM_CONNECTION (nm_settings_add_connection (NM_SETTINGS (provider), connection, save_to_disk, error)); } static gboolean secrets_filter_cb (NMSetting *setting, const char *secret, NMSettingSecretFlags flags, gpointer user_data) { NMSettingSecretFlags filter_flags = GPOINTER_TO_UINT (user_data); /* Returns TRUE to remove the secret */ /* Can't use bitops with SECRET_FLAG_NONE so handle that specifically */ if ( (flags == NM_SETTING_SECRET_FLAG_NONE) && (filter_flags == NM_SETTING_SECRET_FLAG_NONE)) return FALSE; /* Otherwise if the secret has at least one of the desired flags keep it */ return (flags & filter_flags) ? FALSE : TRUE; } static void send_agent_owned_secrets (NMSettings *self, NMSettingsConnection *connection, NMAuthSubject *subject) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); NMConnection *for_agent; /* Dupe the connection so we can clear out non-agent-owned secrets, * as agent-owned secrets are the only ones we send back to be saved. * Only send secrets to agents of the same UID that called update too. */ for_agent = nm_simple_connection_new_clone (NM_CONNECTION (connection)); nm_connection_clear_secrets_with_flags (for_agent, secrets_filter_cb, GUINT_TO_POINTER (NM_SETTING_SECRET_FLAG_AGENT_OWNED)); nm_agent_manager_save_secrets (priv->agent_mgr, for_agent, subject); g_object_unref (for_agent); } static void pk_add_cb (NMAuthChain *chain, GError *chain_error, DBusGMethodInvocation *context, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); NMAuthCallResult result; GError *error = NULL; NMConnection *connection = NULL; NMSettingsConnection *added = NULL; NMSettingsAddCallback callback; gpointer callback_data; NMAuthSubject *subject; const char *perm; gboolean save_to_disk; g_assert (context); priv->auths = g_slist_remove (priv->auths, chain); perm = nm_auth_chain_get_data (chain, "perm"); g_assert (perm); result = nm_auth_chain_get_result (chain, perm); if (chain_error) { error = g_error_new (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "Error checking authorization: %s", chain_error->message ? chain_error->message : "(unknown)"); } else if (result != NM_AUTH_CALL_RESULT_YES) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Insufficient privileges."); } else { /* Authorized */ connection = nm_auth_chain_get_data (chain, "connection"); g_assert (connection); save_to_disk = GPOINTER_TO_UINT (nm_auth_chain_get_data (chain, "save-to-disk")); added = nm_settings_add_connection (self, connection, save_to_disk, &error); } callback = nm_auth_chain_get_data (chain, "callback"); callback_data = nm_auth_chain_get_data (chain, "callback-data"); subject = nm_auth_chain_get_data (chain, "subject"); callback (self, added, error, context, callback_data); /* Send agent-owned secrets to the agents */ if (!error && added && nm_settings_has_connection (self, (NMConnection *) added)) send_agent_owned_secrets (self, added, subject); g_clear_error (&error); nm_auth_chain_unref (chain); } /* FIXME: remove if/when kernel supports adhoc wpa */ static gboolean is_adhoc_wpa (NMConnection *connection) { NMSettingWireless *s_wifi; NMSettingWirelessSecurity *s_wsec; const char *mode, *key_mgmt; /* The kernel doesn't support Ad-Hoc WPA connections well at this time, * and turns them into open networks. It's been this way since at least * 2.6.30 or so; until that's fixed, disable WPA-protected Ad-Hoc networks. */ s_wifi = nm_connection_get_setting_wireless (connection); if (!s_wifi) return FALSE; mode = nm_setting_wireless_get_mode (s_wifi); if (g_strcmp0 (mode, NM_SETTING_WIRELESS_MODE_ADHOC) != 0) return FALSE; s_wsec = nm_connection_get_setting_wireless_security (connection); if (!s_wsec) return FALSE; key_mgmt = nm_setting_wireless_security_get_key_mgmt (s_wsec); if (g_strcmp0 (key_mgmt, "wpa-none") != 0) return FALSE; return TRUE; } void nm_settings_add_connection_dbus (NMSettings *self, NMConnection *connection, gboolean save_to_disk, DBusGMethodInvocation *context, NMSettingsAddCallback callback, gpointer user_data) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); NMSettingConnection *s_con; NMAuthSubject *subject = NULL; NMAuthChain *chain; GError *error = NULL, *tmp_error = NULL; char *error_desc = NULL; const char *perm; g_return_if_fail (connection != NULL); g_return_if_fail (context != NULL); /* Connection must be valid, of course */ if (!nm_connection_verify (connection, &tmp_error)) { error = g_error_new (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION, "The connection was invalid: %s", tmp_error ? tmp_error->message : "(unknown)"); g_error_free (tmp_error); goto done; } /* The kernel doesn't support Ad-Hoc WPA connections well at this time, * and turns them into open networks. It's been this way since at least * 2.6.30 or so; until that's fixed, disable WPA-protected Ad-Hoc networks. */ if (is_adhoc_wpa (connection)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_CONNECTION, "WPA Ad-Hoc disabled due to kernel bugs"); goto done; } /* Do any of the plugins support adding? */ if (!get_plugin (self, NM_SYSTEM_CONFIG_INTERFACE_CAP_MODIFY_CONNECTIONS)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_NOT_SUPPORTED, "None of the registered plugins support add."); goto done; } subject = nm_auth_subject_new_unix_process_from_context (context); if (!subject) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Unable to determine UID of request."); goto done; } /* Ensure the caller's username exists in the connection's permissions, * or that the permissions is empty (ie, visible by everyone). */ if (!nm_auth_is_subject_in_acl (connection, subject, &error_desc)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, error_desc); g_free (error_desc); goto done; } /* If the caller is the only user in the connection's permissions, then * we use the 'modify.own' permission instead of 'modify.system'. If the * request affects more than just the caller, require 'modify.system'. */ s_con = nm_connection_get_setting_connection (connection); g_assert (s_con); if (nm_setting_connection_get_num_permissions (s_con) == 1) perm = NM_AUTH_PERMISSION_SETTINGS_MODIFY_OWN; else perm = NM_AUTH_PERMISSION_SETTINGS_MODIFY_SYSTEM; /* Validate the user request */ chain = nm_auth_chain_new_subject (subject, context, pk_add_cb, self); if (!chain) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Unable to authenticate the request."); goto done; } priv->auths = g_slist_append (priv->auths, chain); nm_auth_chain_add_call (chain, perm, TRUE); nm_auth_chain_set_data (chain, "perm", (gpointer) perm, NULL); nm_auth_chain_set_data (chain, "connection", g_object_ref (connection), g_object_unref); nm_auth_chain_set_data (chain, "callback", callback, NULL); nm_auth_chain_set_data (chain, "callback-data", user_data, NULL); nm_auth_chain_set_data (chain, "subject", g_object_ref (subject), g_object_unref); nm_auth_chain_set_data (chain, "save-to-disk", GUINT_TO_POINTER (save_to_disk), NULL); done: if (error) callback (self, NULL, error, context, user_data); g_clear_error (&error); g_clear_object (&subject); } static void impl_settings_add_connection_add_cb (NMSettings *self, NMSettingsConnection *connection, GError *error, DBusGMethodInvocation *context, gpointer user_data) { if (error) dbus_g_method_return_error (context, error); else dbus_g_method_return (context, nm_connection_get_path (NM_CONNECTION (connection))); } static void impl_settings_add_connection_helper (NMSettings *self, GHashTable *settings, gboolean save_to_disk, DBusGMethodInvocation *context) { NMConnection *connection; GVariant *dict; GError *error = NULL; dict = nm_utils_connection_hash_to_dict (settings); connection = nm_simple_connection_new_from_dbus (dict, &error); g_variant_unref (dict); if (connection) { nm_settings_add_connection_dbus (self, connection, save_to_disk, context, impl_settings_add_connection_add_cb, NULL); g_object_unref (connection); } else { g_assert (error); dbus_g_method_return_error (context, error); g_error_free (error); } } static void impl_settings_add_connection (NMSettings *self, GHashTable *settings, DBusGMethodInvocation *context) { impl_settings_add_connection_helper (self, settings, TRUE, context); } static void impl_settings_add_connection_unsaved (NMSettings *self, GHashTable *settings, DBusGMethodInvocation *context) { impl_settings_add_connection_helper (self, settings, FALSE, context); } static gboolean ensure_root (NMDBusManager *dbus_mgr, DBusGMethodInvocation *context) { gulong caller_uid; GError *error = NULL; if (!nm_dbus_manager_get_caller_info (dbus_mgr, context, NULL, &caller_uid, NULL)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Unable to determine request UID."); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } if (caller_uid != 0) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Permission denied"); dbus_g_method_return_error (context, error); g_error_free (error); return FALSE; } return TRUE; } static void impl_settings_load_connections (NMSettings *self, char **filenames, DBusGMethodInvocation *context) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GPtrArray *failures; GSList *iter; int i; if (!ensure_root (priv->dbus_mgr, context)) return; failures = g_ptr_array_new (); for (i = 0; filenames[i]; i++) { for (iter = priv->plugins; iter; iter = g_slist_next (iter)) { NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data); if (nm_system_config_interface_load_connection (plugin, filenames[i])) break; } if (!iter) { if (!g_path_is_absolute (filenames[i])) nm_log_warn (LOGD_SETTINGS, "Connection filename '%s' is not an absolute path", filenames[i]); g_ptr_array_add (failures, (char *) filenames[i]); } } g_ptr_array_add (failures, NULL); dbus_g_method_return (context, failures->len == 1, failures->pdata); g_ptr_array_unref (failures); } static void impl_settings_reload_connections (NMSettings *self, DBusGMethodInvocation *context) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *iter; if (!ensure_root (priv->dbus_mgr, context)) return; for (iter = priv->plugins; iter; iter = g_slist_next (iter)) { NMSystemConfigInterface *plugin = NM_SYSTEM_CONFIG_INTERFACE (iter->data); nm_system_config_interface_reload_connections (plugin); } dbus_g_method_return (context, TRUE); } static gboolean write_hostname (NMSettingsPrivate *priv, const char *hostname) { char *hostname_eol; gboolean ret; gs_free_error GError *error = NULL; const char *file = priv->hostname.file; #if HAVE_SELINUX security_context_t se_ctx_prev = NULL, se_ctx = NULL; struct stat file_stat = { .st_mode = 0 }; mode_t st_mode = 0; /* Get default context for hostname file and set it for fscreate */ if (stat (file, &file_stat) == 0) st_mode = file_stat.st_mode; matchpathcon (file, st_mode, &se_ctx); matchpathcon_fini (); getfscreatecon (&se_ctx_prev); setfscreatecon (se_ctx); #endif #if defined (HOSTNAME_PERSIST_GENTOO) hostname_eol = g_strdup_printf ("#Generated by NetworkManager\n" "hostname=\"%s\"\n", hostname); #else hostname_eol = g_strdup_printf ("%s\n", hostname); #endif /* FIXME: g_file_set_contents() writes first to a temporary file * and renames it atomically. We should hack g_file_set_contents() * to set the SELINUX labels before renaming the file. */ ret = g_file_set_contents (file, hostname_eol, -1, &error); #if HAVE_SELINUX /* Restore previous context and cleanup */ setfscreatecon (se_ctx_prev); freecon (se_ctx); freecon (se_ctx_prev); #endif g_free (hostname_eol); if (!ret) { nm_log_warn (LOGD_SETTINGS, "Could not save hostname to %s: %s", file, error->message); return FALSE; } return TRUE; } static void pk_hostname_cb (NMAuthChain *chain, GError *chain_error, DBusGMethodInvocation *context, gpointer user_data) { NMSettings *self = NM_SETTINGS (user_data); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); NMAuthCallResult result; GError *error = NULL; const char *hostname; g_assert (context); priv->auths = g_slist_remove (priv->auths, chain); result = nm_auth_chain_get_result (chain, NM_AUTH_PERMISSION_SETTINGS_MODIFY_HOSTNAME); /* If our NMSettingsConnection is already gone, do nothing */ if (chain_error) { error = g_error_new (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "Error checking authorization: %s", chain_error->message ? chain_error->message : "(unknown)"); } else if (result != NM_AUTH_CALL_RESULT_YES) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Insufficient privileges."); } else { hostname = nm_auth_chain_get_data (chain, "hostname"); if (!write_hostname (priv, hostname)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_FAILED, "Saving the hostname failed."); } } if (error) dbus_g_method_return_error (context, error); else dbus_g_method_return (context); g_clear_error (&error); nm_auth_chain_unref (chain); } static gboolean validate_hostname (const char *hostname) { const char *p; gboolean dot = TRUE; if (!hostname || !hostname[0]) return FALSE; for (p = hostname; *p; p++) { if (*p == '.') { if (dot) return FALSE; dot = TRUE; } else { if (!g_ascii_isalnum (*p) && (*p != '-') && (*p != '_')) return FALSE; dot = FALSE; } } if (dot) return FALSE; return (p - hostname <= HOST_NAME_MAX); } static void impl_settings_save_hostname (NMSettings *self, const char *hostname, DBusGMethodInvocation *context) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); NMAuthChain *chain; GError *error = NULL; /* Minimal validation of the hostname */ if (!validate_hostname (hostname)) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_INVALID_HOSTNAME, "The hostname was too long or contained invalid characters."); goto done; } chain = nm_auth_chain_new_context (context, pk_hostname_cb, self); if (!chain) { error = g_error_new_literal (NM_SETTINGS_ERROR, NM_SETTINGS_ERROR_PERMISSION_DENIED, "Unable to authenticate the request."); goto done; } priv->auths = g_slist_append (priv->auths, chain); nm_auth_chain_add_call (chain, NM_AUTH_PERMISSION_SETTINGS_MODIFY_HOSTNAME, TRUE); nm_auth_chain_set_data (chain, "hostname", g_strdup (hostname), g_free); done: if (error) dbus_g_method_return_error (context, error); g_clear_error (&error); } static void hostname_maybe_changed (NMSettings *settings) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (settings); char *new_hostname; new_hostname = nm_settings_get_hostname (settings); if ( (new_hostname && !priv->hostname.value) || (!new_hostname && priv->hostname.value) || (priv->hostname.value && new_hostname && strcmp (priv->hostname.value, new_hostname))) { nm_log_info (LOGD_SETTINGS, "hostname changed from '%s' to '%s'", priv->hostname.value, new_hostname); g_free (priv->hostname.value); priv->hostname.value = new_hostname; g_object_notify (G_OBJECT (settings), NM_SETTINGS_HOSTNAME); } else g_free (new_hostname); } static void hostname_file_changed_cb (GFileMonitor *monitor, GFile *file, GFile *other_file, GFileMonitorEvent event_type, gpointer user_data) { hostname_maybe_changed (user_data); } static gboolean have_connection_for_device (NMSettings *self, NMDevice *device) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GHashTableIter iter; gpointer data; NMSettingConnection *s_con; NMSettingWired *s_wired; const char *setting_hwaddr; const char *device_hwaddr; g_return_val_if_fail (NM_IS_SETTINGS (self), FALSE); device_hwaddr = nm_device_get_hw_address (device); /* Find a wired connection locked to the given MAC address, if any */ g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, &data)) { NMConnection *connection = NM_CONNECTION (data); const char *ctype, *iface; if (!nm_device_check_connection_compatible (device, connection)) continue; s_con = nm_connection_get_setting_connection (connection); iface = nm_setting_connection_get_interface_name (s_con); if (iface && strcmp (iface, nm_device_get_iface (device)) != 0) continue; ctype = nm_setting_connection_get_connection_type (s_con); if ( strcmp (ctype, NM_SETTING_WIRED_SETTING_NAME) && strcmp (ctype, NM_SETTING_PPPOE_SETTING_NAME)) continue; s_wired = nm_connection_get_setting_wired (connection); if (!s_wired && !strcmp (ctype, NM_SETTING_PPPOE_SETTING_NAME)) { /* No wired setting; therefore the PPPoE connection applies to any device */ return TRUE; } g_assert (s_wired != NULL); setting_hwaddr = nm_setting_wired_get_mac_address (s_wired); if (setting_hwaddr) { /* A connection mac-locked to this device */ if ( device_hwaddr && nm_utils_hwaddr_matches (setting_hwaddr, -1, device_hwaddr, -1)) return TRUE; } else { /* A connection that applies to any wired device */ return TRUE; } } /* See if there's a known non-NetworkManager configuration for the device */ if (nm_device_spec_match_list (device, priv->unrecognized_specs)) return TRUE; return FALSE; } #define DEFAULT_WIRED_CONNECTION_TAG "default-wired-connection" #define DEFAULT_WIRED_DEVICE_TAG "default-wired-device" static void default_wired_clear_tag (NMSettings *self, NMDevice *device, NMSettingsConnection *connection, gboolean add_to_no_auto_default); static void default_wired_connection_removed_cb (NMSettingsConnection *connection, NMSettings *self) { NMDevice *device; /* When the default wired connection is removed (either deleted or saved to * a new persistent connection by a plugin), write the MAC address of the * wired device to the config file and don't create a new default wired * connection for that device again. */ device = g_object_get_data (G_OBJECT (connection), DEFAULT_WIRED_DEVICE_TAG); if (device) default_wired_clear_tag (self, device, connection, TRUE); } static void default_wired_connection_updated_by_user_cb (NMSettingsConnection *connection, NMSettings *self) { NMDevice *device; /* The connection has been changed by the user, it should no longer be * considered a default wired connection, and should no longer affect * the no-auto-default configuration option. */ device = g_object_get_data (G_OBJECT (connection), DEFAULT_WIRED_DEVICE_TAG); if (device) default_wired_clear_tag (self, device, connection, FALSE); } static void default_wired_clear_tag (NMSettings *self, NMDevice *device, NMSettingsConnection *connection, gboolean add_to_no_auto_default) { g_return_if_fail (NM_IS_SETTINGS (self)); g_return_if_fail (NM_IS_DEVICE (device)); g_return_if_fail (NM_IS_CONNECTION (connection)); g_return_if_fail (device == g_object_get_data (G_OBJECT (connection), DEFAULT_WIRED_DEVICE_TAG)); g_return_if_fail (connection == g_object_get_data (G_OBJECT (device), DEFAULT_WIRED_CONNECTION_TAG)); g_object_set_data (G_OBJECT (connection), DEFAULT_WIRED_DEVICE_TAG, NULL); g_object_set_data (G_OBJECT (device), DEFAULT_WIRED_CONNECTION_TAG, NULL); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (default_wired_connection_removed_cb), self); g_signal_handlers_disconnect_by_func (connection, G_CALLBACK (default_wired_connection_updated_by_user_cb), self); if (add_to_no_auto_default) nm_config_set_no_auto_default_for_device (NM_SETTINGS_GET_PRIVATE (self)->config, device); } void nm_settings_device_added (NMSettings *self, NMDevice *device) { NMConnection *connection; NMSettingsConnection *added; GError *error = NULL; /* If the device isn't managed or it already has a default wired connection, * ignore it. */ if ( !nm_device_get_managed (device) || g_object_get_data (G_OBJECT (device), DEFAULT_WIRED_CONNECTION_TAG) || have_connection_for_device (self, device)) return; connection = nm_device_new_default_connection (device); if (!connection) return; /* Add the connection */ added = nm_settings_add_connection (self, connection, FALSE, &error); g_object_unref (connection); if (!added) { nm_log_warn (LOGD_SETTINGS, "(%s) couldn't create default wired connection: %s", nm_device_get_iface (device), (error && error->message) ? error->message : "(unknown)"); g_clear_error (&error); return; } g_object_set_data (G_OBJECT (added), DEFAULT_WIRED_DEVICE_TAG, device); g_object_set_data (G_OBJECT (device), DEFAULT_WIRED_CONNECTION_TAG, added); g_signal_connect (added, NM_SETTINGS_CONNECTION_UPDATED_BY_USER, G_CALLBACK (default_wired_connection_updated_by_user_cb), self); g_signal_connect (added, NM_SETTINGS_CONNECTION_REMOVED, G_CALLBACK (default_wired_connection_removed_cb), self); nm_log_info (LOGD_SETTINGS, "(%s): created default wired connection '%s'", nm_device_get_iface (device), nm_connection_get_id (NM_CONNECTION (added))); } void nm_settings_device_removed (NMSettings *self, NMDevice *device, gboolean quitting) { NMSettingsConnection *connection; connection = g_object_get_data (G_OBJECT (device), DEFAULT_WIRED_CONNECTION_TAG); if (connection) { default_wired_clear_tag (self, device, connection, FALSE); /* Don't delete the default wired connection on shutdown, so that it * remains up and can be assumed if NM starts again. */ if (quitting == FALSE) nm_settings_connection_delete (connection, NULL, NULL); } } /***************************************************************/ /* GCompareFunc helper for sorting "best" connections. * The function sorts connections in ascending timestamp order. * That means an older connection (lower timestamp) goes before * a newer one. */ gint nm_settings_sort_connections (gconstpointer a, gconstpointer b) { NMSettingsConnection *ac = (NMSettingsConnection *) a; NMSettingsConnection *bc = (NMSettingsConnection *) b; guint64 ats = 0, bts = 0; if (ac == bc) return 0; if (!ac) return -1; if (!bc) return 1; /* In the future we may use connection priorities in addition to timestamps */ nm_settings_connection_get_timestamp (ac, &ats); nm_settings_connection_get_timestamp (bc, &bts); if (ats < bts) return -1; else if (ats > bts) return 1; return 0; } static GSList * get_best_connections (NMConnectionProvider *provider, guint max_requested, const char *ctype1, const char *ctype2, NMConnectionFilterFunc func, gpointer func_data) { NMSettings *self = NM_SETTINGS (provider); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); GSList *sorted = NULL; GHashTableIter iter; NMSettingsConnection *connection; guint added = 0; guint64 oldest = 0; g_hash_table_iter_init (&iter, priv->connections); while (g_hash_table_iter_next (&iter, NULL, (gpointer) &connection)) { guint64 cur_ts = 0; if (ctype1 && !nm_connection_is_type (NM_CONNECTION (connection), ctype1)) continue; if (ctype2 && !nm_connection_is_type (NM_CONNECTION (connection), ctype2)) continue; if (func && !func (provider, NM_CONNECTION (connection), func_data)) continue; /* Don't bother with a connection that's older than the oldest one in the list */ if (max_requested && added >= max_requested) { nm_settings_connection_get_timestamp (connection, &cur_ts); if (cur_ts <= oldest) continue; } /* List is sorted with oldest first */ sorted = g_slist_insert_sorted (sorted, connection, nm_settings_sort_connections); added++; if (max_requested && added > max_requested) { /* Over the limit, remove the oldest one */ sorted = g_slist_delete_link (sorted, sorted); added--; } nm_settings_connection_get_timestamp (NM_SETTINGS_CONNECTION (sorted->data), &oldest); } return g_slist_reverse (sorted); } static const GSList * get_connections (NMConnectionProvider *provider) { GSList *list = NULL; NMSettings *self = NM_SETTINGS (provider); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); list = _nm_utils_hash_values_to_slist (priv->connections); /* Cache the list every call so we can keep it 'const' for callers */ g_slist_free (priv->get_connections_cache); priv->get_connections_cache = list; return list; } static NMConnection * cp_get_connection_by_uuid (NMConnectionProvider *provider, const char *uuid) { return NM_CONNECTION (nm_settings_get_connection_by_uuid (NM_SETTINGS (provider), uuid)); } /***************************************************************/ gboolean nm_settings_get_startup_complete (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); return priv->startup_complete; } /***************************************************************/ NMSettings * nm_settings_new (GError **error) { NMSettings *self; NMSettingsPrivate *priv; GFile *file; GFileMonitor *monitor; self = g_object_new (NM_TYPE_SETTINGS, NULL); priv = NM_SETTINGS_GET_PRIVATE (self); priv->config = nm_config_get (); priv->dbus_mgr = nm_dbus_manager_get (); /* Load the plugins; fail if a plugin is not found. */ if (!load_plugins (self, nm_config_get_plugins (priv->config), error)) { g_object_unref (self); return NULL; } load_connections (self); check_startup_complete (self); priv->hostname.file = HOSTNAME_FILE; priv->hostname.value = nm_settings_get_hostname (self); /* monitor changes to hostname file */ file = g_file_new_for_path (priv->hostname.file); monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, NULL); g_object_unref (file); if (monitor) { priv->hostname.monitor_id = g_signal_connect (monitor, "changed", G_CALLBACK (hostname_file_changed_cb), self); priv->hostname.monitor = monitor; } #if defined (HOSTNAME_PERSIST_SUSE) /* monitor changes to dhcp file to know whether the hostname is valid */ file = g_file_new_for_path (CONF_DHCP); monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, NULL); g_object_unref (file); if (monitor) { priv->hostname.dhcp_monitor_id = g_signal_connect (monitor, "changed", G_CALLBACK (hostname_file_changed_cb), self); priv->hostname.dhcp_monitor = monitor; } #endif hostname_maybe_changed (self); nm_dbus_manager_register_object (priv->dbus_mgr, NM_DBUS_PATH_SETTINGS, self); return self; } static void connection_provider_init (NMConnectionProvider *cp_class) { cp_class->get_best_connections = get_best_connections; cp_class->get_connections = get_connections; cp_class->add_connection = _nm_connection_provider_add_connection; cp_class->get_connection_by_uuid = cp_get_connection_by_uuid; } static void nm_settings_init (NMSettings *self) { NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); priv->connections = g_hash_table_new_full (g_str_hash, g_str_equal, NULL, g_object_unref); /* Hold a reference to the agent manager so it stays alive; the only * other holders are NMSettingsConnection objects which are often * transient, and we don't want the agent manager to get destroyed and * recreated often. */ priv->agent_mgr = g_object_ref (nm_agent_manager_get ()); g_signal_connect (priv->agent_mgr, "agent-registered", G_CALLBACK (secret_agent_registered), self); } static void dispose (GObject *object) { NMSettings *self = NM_SETTINGS (object); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); g_slist_free_full (priv->auths, (GDestroyNotify) nm_auth_chain_unref); priv->auths = NULL; priv->dbus_mgr = NULL; g_object_unref (priv->agent_mgr); if (priv->hostname.monitor) { if (priv->hostname.monitor_id) g_signal_handler_disconnect (priv->hostname.monitor, priv->hostname.monitor_id); g_file_monitor_cancel (priv->hostname.monitor); g_clear_object (&priv->hostname.monitor); } if (priv->hostname.dhcp_monitor) { if (priv->hostname.dhcp_monitor_id) g_signal_handler_disconnect (priv->hostname.dhcp_monitor, priv->hostname.dhcp_monitor_id); g_file_monitor_cancel (priv->hostname.dhcp_monitor); g_clear_object (&priv->hostname.dhcp_monitor); } g_clear_pointer (&priv->hostname.value, g_free); G_OBJECT_CLASS (nm_settings_parent_class)->dispose (object); } static void finalize (GObject *object) { NMSettings *self = NM_SETTINGS (object); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); g_hash_table_destroy (priv->connections); g_slist_free (priv->get_connections_cache); g_slist_free_full (priv->unmanaged_specs, g_free); g_slist_free_full (priv->unrecognized_specs, g_free); g_slist_free_full (priv->plugins, g_object_unref); G_OBJECT_CLASS (nm_settings_parent_class)->finalize (object); } static void get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { NMSettings *self = NM_SETTINGS (object); NMSettingsPrivate *priv = NM_SETTINGS_GET_PRIVATE (self); const GSList *specs, *iter; GSList *copy = NULL; GHashTableIter citer; GPtrArray *array; const char *path; switch (prop_id) { case PROP_UNMANAGED_SPECS: specs = nm_settings_get_unmanaged_specs (self); for (iter = specs; iter; iter = g_slist_next (iter)) copy = g_slist_append (copy, g_strdup (iter->data)); g_value_take_boxed (value, copy); break; case PROP_HOSTNAME: g_value_take_string (value, nm_settings_get_hostname (self)); /* Don't ever pass NULL through D-Bus */ if (!g_value_get_string (value)) g_value_set_static_string (value, ""); break; case PROP_CAN_MODIFY: g_value_set_boolean (value, !!get_plugin (self, NM_SYSTEM_CONFIG_INTERFACE_CAP_MODIFY_CONNECTIONS)); break; case PROP_CONNECTIONS: array = g_ptr_array_sized_new (g_hash_table_size (priv->connections)); g_hash_table_iter_init (&citer, priv->connections); while (g_hash_table_iter_next (&citer, (gpointer) &path, NULL)) g_ptr_array_add (array, g_strdup (path)); g_value_take_boxed (value, array); break; case PROP_STARTUP_COMPLETE: g_value_set_boolean (value, nm_settings_get_startup_complete (self)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void nm_settings_class_init (NMSettingsClass *class) { GObjectClass *object_class = G_OBJECT_CLASS (class); g_type_class_add_private (class, sizeof (NMSettingsPrivate)); /* virtual methods */ object_class->notify = notify; object_class->get_property = get_property; object_class->dispose = dispose; object_class->finalize = finalize; /* properties */ g_object_class_install_property (object_class, PROP_UNMANAGED_SPECS, g_param_spec_boxed (NM_SETTINGS_UNMANAGED_SPECS, "", "", DBUS_TYPE_G_LIST_OF_STRING, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_HOSTNAME, g_param_spec_string (NM_SETTINGS_HOSTNAME, "", "", NULL, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_CAN_MODIFY, g_param_spec_boolean (NM_SETTINGS_CAN_MODIFY, "", "", FALSE, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (object_class, PROP_CONNECTIONS, g_param_spec_boxed (NM_SETTINGS_CONNECTIONS, "", "", DBUS_TYPE_G_ARRAY_OF_OBJECT_PATH, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS)); /* signals */ signals[PROPERTIES_CHANGED] = g_signal_new ("properties-changed", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, properties_changed), NULL, NULL, g_cclosure_marshal_VOID__BOXED, G_TYPE_NONE, 1, DBUS_TYPE_G_MAP_OF_VARIANT); signals[CONNECTION_ADDED] = g_signal_new (NM_SETTINGS_SIGNAL_CONNECTION_ADDED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, connection_added), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[CONNECTION_UPDATED] = g_signal_new (NM_SETTINGS_SIGNAL_CONNECTION_UPDATED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, connection_updated), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[CONNECTION_UPDATED_BY_USER] = g_signal_new (NM_SETTINGS_SIGNAL_CONNECTION_UPDATED_BY_USER, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, 0, NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[CONNECTION_REMOVED] = g_signal_new (NM_SETTINGS_SIGNAL_CONNECTION_REMOVED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, connection_removed), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[CONNECTION_VISIBILITY_CHANGED] = g_signal_new (NM_SETTINGS_SIGNAL_CONNECTION_VISIBILITY_CHANGED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, connection_visibility_changed), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[AGENT_REGISTERED] = g_signal_new (NM_SETTINGS_SIGNAL_AGENT_REGISTERED, G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (NMSettingsClass, agent_registered), NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); signals[NEW_CONNECTION] = g_signal_new ("new-connection", G_OBJECT_CLASS_TYPE (object_class), G_SIGNAL_RUN_FIRST, 0, NULL, NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT); dbus_g_error_domain_register (NM_SETTINGS_ERROR, NM_DBUS_INTERFACE_SETTINGS, NM_TYPE_SETTINGS_ERROR); dbus_g_error_domain_register (NM_CONNECTION_ERROR, NM_DBUS_INTERFACE_SETTINGS_CONNECTION, NM_TYPE_CONNECTION_ERROR); dbus_g_object_type_install_info (NM_TYPE_SETTINGS, &dbus_glib_nm_settings_object_info); }