| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * |
| * D-Bus helper library |
| * |
| * Copyright (C) 2004-2011 Marcel Holtmann <marcel@holtmann.org> |
| * |
| * |
| */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include <config.h> |
| #endif |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdbool.h> |
| |
| #include <glib.h> |
| #include <dbus/dbus.h> |
| |
| #include "gdbus.h" |
| |
| #define info(fmt...) |
| #define error(fmt...) |
| #define debug(fmt...) |
| |
| #define DBUS_INTERFACE_OBJECT_MANAGER "org.freedesktop.DBus.ObjectManager" |
| |
| #ifndef DBUS_ERROR_UNKNOWN_PROPERTY |
| #define DBUS_ERROR_UNKNOWN_PROPERTY "org.freedesktop.DBus.Error.UnknownProperty" |
| #endif |
| |
| #ifndef DBUS_ERROR_PROPERTY_READ_ONLY |
| #define DBUS_ERROR_PROPERTY_READ_ONLY "org.freedesktop.DBus.Error.PropertyReadOnly" |
| #endif |
| |
| struct generic_data { |
| unsigned int refcount; |
| DBusConnection *conn; |
| char *path; |
| GSList *interfaces; |
| GSList *objects; |
| GSList *added; |
| GSList *removed; |
| guint process_id; |
| gboolean pending_prop; |
| char *introspect; |
| struct generic_data *parent; |
| }; |
| |
| struct interface_data { |
| char *name; |
| const GDBusMethodTable *methods; |
| const GDBusSignalTable *signals; |
| const GDBusPropertyTable *properties; |
| GSList *pending_prop; |
| void *user_data; |
| GDBusDestroyFunction destroy; |
| }; |
| |
| struct security_data { |
| GDBusPendingReply pending; |
| DBusMessage *message; |
| const GDBusMethodTable *method; |
| void *iface_user_data; |
| }; |
| |
| struct property_data { |
| DBusConnection *conn; |
| GDBusPendingPropertySet id; |
| DBusMessage *message; |
| }; |
| |
| static int global_flags = 0; |
| static struct generic_data *root; |
| static GSList *pending = NULL; |
| |
| static gboolean process_changes(gpointer user_data); |
| static void process_properties_from_interface(struct generic_data *data, |
| struct interface_data *iface); |
| static void process_property_changes(struct generic_data *data); |
| |
| static void print_arguments(GString *gstr, const GDBusArgInfo *args, |
| const char *direction) |
| { |
| for (; args && args->name; args++) { |
| g_string_append_printf(gstr, |
| "<arg name=\"%s\" type=\"%s\"", |
| args->name, args->signature); |
| |
| if (direction) |
| g_string_append_printf(gstr, |
| " direction=\"%s\"/>\n", direction); |
| else |
| g_string_append_printf(gstr, "/>\n"); |
| |
| } |
| } |
| |
| #define G_DBUS_ANNOTATE(name_, value_) \ |
| "<annotation name=\"org.freedesktop.DBus." name_ "\" " \ |
| "value=\"" value_ "\"/>" |
| |
| #define G_DBUS_ANNOTATE_DEPRECATED \ |
| G_DBUS_ANNOTATE("Deprecated", "true") |
| |
| #define G_DBUS_ANNOTATE_NOREPLY \ |
| G_DBUS_ANNOTATE("Method.NoReply", "true") |
| |
| static gboolean check_experimental(int flags, int flag) |
| { |
| if (!(flags & flag)) |
| return FALSE; |
| |
| return !(global_flags & G_DBUS_FLAG_ENABLE_EXPERIMENTAL); |
| } |
| |
| static bool check_testing(int flags, int flag) |
| { |
| if (!(flags & flag)) |
| return false; |
| |
| return !(global_flags & G_DBUS_FLAG_ENABLE_TESTING); |
| } |
| |
| static void generate_interface_xml(GString *gstr, struct interface_data *iface) |
| { |
| const GDBusMethodTable *method; |
| const GDBusSignalTable *signal; |
| const GDBusPropertyTable *property; |
| |
| for (method = iface->methods; method && method->name; method++) { |
| if (check_experimental(method->flags, |
| G_DBUS_METHOD_FLAG_EXPERIMENTAL)) |
| continue; |
| |
| if (check_testing(method->flags, G_DBUS_METHOD_FLAG_TESTING)) |
| continue; |
| |
| g_string_append_printf(gstr, "<method name=\"%s\">", |
| method->name); |
| print_arguments(gstr, method->in_args, "in"); |
| print_arguments(gstr, method->out_args, "out"); |
| |
| if (method->flags & G_DBUS_METHOD_FLAG_DEPRECATED) |
| g_string_append_printf(gstr, |
| G_DBUS_ANNOTATE_DEPRECATED); |
| |
| if (method->flags & G_DBUS_METHOD_FLAG_NOREPLY) |
| g_string_append_printf(gstr, G_DBUS_ANNOTATE_NOREPLY); |
| |
| g_string_append_printf(gstr, "</method>"); |
| } |
| |
| for (signal = iface->signals; signal && signal->name; signal++) { |
| if (check_experimental(signal->flags, |
| G_DBUS_SIGNAL_FLAG_EXPERIMENTAL)) |
| continue; |
| |
| if (check_testing(signal->flags, G_DBUS_SIGNAL_FLAG_TESTING)) |
| continue; |
| |
| g_string_append_printf(gstr, "<signal name=\"%s\">", |
| signal->name); |
| print_arguments(gstr, signal->args, NULL); |
| |
| if (signal->flags & G_DBUS_SIGNAL_FLAG_DEPRECATED) |
| g_string_append_printf(gstr, |
| G_DBUS_ANNOTATE_DEPRECATED); |
| |
| g_string_append_printf(gstr, "</signal>\n"); |
| } |
| |
| for (property = iface->properties; property && property->name; |
| property++) { |
| if (check_experimental(property->flags, |
| G_DBUS_PROPERTY_FLAG_EXPERIMENTAL)) |
| continue; |
| |
| if (check_testing(property->flags, |
| G_DBUS_PROPERTY_FLAG_TESTING)) |
| continue; |
| |
| g_string_append_printf(gstr, "<property name=\"%s\"" |
| " type=\"%s\" access=\"%s%s\">", |
| property->name, property->type, |
| property->get ? "read" : "", |
| property->set ? "write" : ""); |
| |
| if (property->flags & G_DBUS_PROPERTY_FLAG_DEPRECATED) |
| g_string_append_printf(gstr, |
| G_DBUS_ANNOTATE_DEPRECATED); |
| |
| g_string_append_printf(gstr, "</property>"); |
| } |
| } |
| |
| static void generate_introspection_xml(DBusConnection *conn, |
| struct generic_data *data, const char *path) |
| { |
| GSList *list; |
| GString *gstr; |
| char **children; |
| int i; |
| |
| g_free(data->introspect); |
| |
| gstr = g_string_new(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE); |
| |
| g_string_append_printf(gstr, "<node>"); |
| |
| for (list = data->interfaces; list; list = list->next) { |
| struct interface_data *iface = list->data; |
| |
| g_string_append_printf(gstr, "<interface name=\"%s\">", |
| iface->name); |
| |
| generate_interface_xml(gstr, iface); |
| |
| g_string_append_printf(gstr, "</interface>"); |
| } |
| |
| if (!dbus_connection_list_registered(conn, path, &children)) |
| goto done; |
| |
| for (i = 0; children[i]; i++) |
| g_string_append_printf(gstr, "<node name=\"%s\"/>", |
| children[i]); |
| |
| dbus_free_string_array(children); |
| |
| done: |
| g_string_append_printf(gstr, "</node>"); |
| |
| data->introspect = g_string_free(gstr, FALSE); |
| } |
| |
| static DBusMessage *introspect(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| DBusMessage *reply; |
| |
| if (data->introspect == NULL) |
| generate_introspection_xml(connection, data, |
| dbus_message_get_path(message)); |
| |
| reply = dbus_message_new_method_return(message); |
| if (reply == NULL) |
| return NULL; |
| |
| dbus_message_append_args(reply, DBUS_TYPE_STRING, &data->introspect, |
| DBUS_TYPE_INVALID); |
| |
| return reply; |
| } |
| |
| static DBusHandlerResult process_message(DBusConnection *connection, |
| DBusMessage *message, const GDBusMethodTable *method, |
| void *iface_user_data) |
| { |
| DBusMessage *reply; |
| |
| reply = method->function(connection, message, iface_user_data); |
| |
| if (method->flags & G_DBUS_METHOD_FLAG_NOREPLY || |
| dbus_message_get_no_reply(message)) { |
| if (reply != NULL) |
| dbus_message_unref(reply); |
| return DBUS_HANDLER_RESULT_HANDLED; |
| } |
| |
| if (method->flags & G_DBUS_METHOD_FLAG_ASYNC) { |
| if (reply == NULL) |
| return DBUS_HANDLER_RESULT_HANDLED; |
| } |
| |
| if (reply == NULL) |
| return DBUS_HANDLER_RESULT_NEED_MEMORY; |
| |
| g_dbus_send_message(connection, reply); |
| |
| return DBUS_HANDLER_RESULT_HANDLED; |
| } |
| |
| static GDBusPendingReply next_pending = 1; |
| static GSList *pending_security = NULL; |
| |
| static const GDBusSecurityTable *security_table = NULL; |
| |
| void g_dbus_pending_success(DBusConnection *connection, |
| GDBusPendingReply pending) |
| { |
| GSList *list; |
| |
| for (list = pending_security; list; list = list->next) { |
| struct security_data *secdata = list->data; |
| |
| if (secdata->pending != pending) |
| continue; |
| |
| pending_security = g_slist_remove(pending_security, secdata); |
| |
| process_message(connection, secdata->message, |
| secdata->method, secdata->iface_user_data); |
| |
| dbus_message_unref(secdata->message); |
| g_free(secdata); |
| return; |
| } |
| } |
| |
| void g_dbus_pending_error_valist(DBusConnection *connection, |
| GDBusPendingReply pending, const char *name, |
| const char *format, va_list args) |
| { |
| GSList *list; |
| |
| for (list = pending_security; list; list = list->next) { |
| struct security_data *secdata = list->data; |
| |
| if (secdata->pending != pending) |
| continue; |
| |
| pending_security = g_slist_remove(pending_security, secdata); |
| |
| g_dbus_send_error_valist(connection, secdata->message, |
| name, format, args); |
| |
| dbus_message_unref(secdata->message); |
| g_free(secdata); |
| return; |
| } |
| } |
| |
| void g_dbus_pending_error(DBusConnection *connection, |
| GDBusPendingReply pending, |
| const char *name, const char *format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| |
| g_dbus_pending_error_valist(connection, pending, name, format, args); |
| |
| va_end(args); |
| } |
| |
| int polkit_check_authorization(DBusConnection *conn, |
| const char *action, gboolean interaction, |
| void (*function) (dbus_bool_t authorized, |
| void *user_data), |
| void *user_data, int timeout); |
| |
| struct builtin_security_data { |
| DBusConnection *conn; |
| GDBusPendingReply pending; |
| }; |
| |
| static void builtin_security_result(dbus_bool_t authorized, void *user_data) |
| { |
| struct builtin_security_data *data = user_data; |
| |
| if (authorized == TRUE) |
| g_dbus_pending_success(data->conn, data->pending); |
| else |
| g_dbus_pending_error(data->conn, data->pending, |
| DBUS_ERROR_AUTH_FAILED, NULL); |
| |
| g_free(data); |
| } |
| |
| static void builtin_security_function(DBusConnection *conn, |
| const char *action, |
| gboolean interaction, |
| GDBusPendingReply pending) |
| { |
| struct builtin_security_data *data; |
| |
| data = g_new0(struct builtin_security_data, 1); |
| data->conn = conn; |
| data->pending = pending; |
| |
| if (polkit_check_authorization(conn, action, interaction, |
| builtin_security_result, data, 30000) < 0) |
| g_dbus_pending_error(conn, pending, NULL, NULL); |
| } |
| |
| static gboolean check_privilege(DBusConnection *conn, DBusMessage *msg, |
| const GDBusMethodTable *method, void *iface_user_data) |
| { |
| const GDBusSecurityTable *security; |
| |
| for (security = security_table; security && security->privilege; |
| security++) { |
| struct security_data *secdata; |
| gboolean interaction; |
| |
| if (security->privilege != method->privilege) |
| continue; |
| |
| secdata = g_new(struct security_data, 1); |
| secdata->pending = next_pending++; |
| secdata->message = dbus_message_ref(msg); |
| secdata->method = method; |
| secdata->iface_user_data = iface_user_data; |
| |
| pending_security = g_slist_prepend(pending_security, secdata); |
| |
| if (security->flags & G_DBUS_SECURITY_FLAG_ALLOW_INTERACTION) |
| interaction = TRUE; |
| else |
| interaction = FALSE; |
| |
| if (!(security->flags & G_DBUS_SECURITY_FLAG_BUILTIN) && |
| security->function) |
| security->function(conn, security->action, |
| interaction, secdata->pending); |
| else |
| builtin_security_function(conn, security->action, |
| interaction, secdata->pending); |
| |
| return TRUE; |
| } |
| |
| return FALSE; |
| } |
| |
| static GDBusPendingPropertySet next_pending_property = 1; |
| static GSList *pending_property_set; |
| |
| static struct property_data *remove_pending_property_data( |
| GDBusPendingPropertySet id) |
| { |
| struct property_data *propdata; |
| GSList *l; |
| |
| for (l = pending_property_set; l != NULL; l = l->next) { |
| propdata = l->data; |
| if (propdata->id != id) |
| continue; |
| |
| break; |
| } |
| |
| if (l == NULL) |
| return NULL; |
| |
| pending_property_set = g_slist_delete_link(pending_property_set, l); |
| |
| return propdata; |
| } |
| |
| void g_dbus_pending_property_success(GDBusPendingPropertySet id) |
| { |
| struct property_data *propdata; |
| |
| propdata = remove_pending_property_data(id); |
| if (propdata == NULL) |
| return; |
| |
| g_dbus_send_reply(propdata->conn, propdata->message, |
| DBUS_TYPE_INVALID); |
| dbus_message_unref(propdata->message); |
| g_free(propdata); |
| } |
| |
| void g_dbus_pending_property_error_valist(GDBusPendingReply id, |
| const char *name, const char *format, |
| va_list args) |
| { |
| struct property_data *propdata; |
| |
| propdata = remove_pending_property_data(id); |
| if (propdata == NULL) |
| return; |
| |
| g_dbus_send_error_valist(propdata->conn, propdata->message, name, |
| format, args); |
| |
| dbus_message_unref(propdata->message); |
| g_free(propdata); |
| } |
| |
| void g_dbus_pending_property_error(GDBusPendingReply id, const char *name, |
| const char *format, ...) |
| { |
| va_list args; |
| |
| va_start(args, format); |
| |
| g_dbus_pending_property_error_valist(id, name, format, args); |
| |
| va_end(args); |
| } |
| |
| static void reset_parent(gpointer data, gpointer user_data) |
| { |
| struct generic_data *child = data; |
| struct generic_data *parent = user_data; |
| |
| child->parent = parent; |
| } |
| |
| static void append_property(struct interface_data *iface, |
| const GDBusPropertyTable *p, DBusMessageIter *dict) |
| { |
| DBusMessageIter entry, value; |
| |
| dbus_message_iter_open_container(dict, DBUS_TYPE_DICT_ENTRY, NULL, |
| &entry); |
| dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &p->name); |
| dbus_message_iter_open_container(&entry, DBUS_TYPE_VARIANT, p->type, |
| &value); |
| |
| p->get(p, &value, iface->user_data); |
| |
| dbus_message_iter_close_container(&entry, &value); |
| dbus_message_iter_close_container(dict, &entry); |
| } |
| |
| static void append_properties(struct interface_data *data, |
| DBusMessageIter *iter) |
| { |
| DBusMessageIter dict; |
| const GDBusPropertyTable *p; |
| |
| dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_VARIANT_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict); |
| |
| for (p = data->properties; p && p->name; p++) { |
| if (check_experimental(p->flags, |
| G_DBUS_PROPERTY_FLAG_EXPERIMENTAL)) |
| continue; |
| |
| if (check_testing(p->flags, G_DBUS_PROPERTY_FLAG_TESTING)) |
| continue; |
| |
| if (p->get == NULL) |
| continue; |
| |
| if (p->exists != NULL && !p->exists(p, data->user_data)) |
| continue; |
| |
| append_property(data, p, &dict); |
| } |
| |
| dbus_message_iter_close_container(iter, &dict); |
| } |
| |
| static void append_interface(gpointer data, gpointer user_data) |
| { |
| struct interface_data *iface = data; |
| DBusMessageIter *array = user_data; |
| DBusMessageIter entry; |
| |
| dbus_message_iter_open_container(array, DBUS_TYPE_DICT_ENTRY, NULL, |
| &entry); |
| dbus_message_iter_append_basic(&entry, DBUS_TYPE_STRING, &iface->name); |
| append_properties(data, &entry); |
| dbus_message_iter_close_container(array, &entry); |
| } |
| |
| static void emit_interfaces_added(struct generic_data *data) |
| { |
| DBusMessage *signal; |
| DBusMessageIter iter, array; |
| |
| if (root == NULL || data == root) |
| return; |
| |
| /* Emit InterfacesAdded on the parent first so it appears first on the |
| * bus as child objects may point to it. |
| */ |
| if (data->parent && data->parent->added) |
| emit_interfaces_added(data->parent); |
| |
| signal = dbus_message_new_signal(root->path, |
| DBUS_INTERFACE_OBJECT_MANAGER, |
| "InterfacesAdded"); |
| if (signal == NULL) |
| return; |
| |
| dbus_message_iter_init_append(signal, &iter); |
| dbus_message_iter_append_basic(&iter, DBUS_TYPE_OBJECT_PATH, |
| &data->path); |
| |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_ARRAY_AS_STRING |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_VARIANT_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &array); |
| |
| g_slist_foreach(data->added, append_interface, &array); |
| g_slist_free(data->added); |
| data->added = NULL; |
| |
| dbus_message_iter_close_container(&iter, &array); |
| |
| /* Use dbus_connection_send to avoid recursive calls to g_dbus_flush */ |
| dbus_connection_send(data->conn, signal, NULL); |
| dbus_message_unref(signal); |
| } |
| |
| static struct interface_data *find_interface(GSList *interfaces, |
| const char *name) |
| { |
| GSList *list; |
| |
| if (name == NULL) |
| return NULL; |
| |
| for (list = interfaces; list; list = list->next) { |
| struct interface_data *iface = list->data; |
| if (!strcmp(name, iface->name)) |
| return iface; |
| } |
| |
| return NULL; |
| } |
| |
| static gboolean g_dbus_args_have_signature(const GDBusArgInfo *args, |
| DBusMessage *message) |
| { |
| const char *sig = dbus_message_get_signature(message); |
| const char *p = NULL; |
| |
| for (; args && args->signature && *sig; args++) { |
| p = args->signature; |
| |
| for (; *sig && *p; sig++, p++) { |
| if (*p != *sig) |
| return FALSE; |
| } |
| } |
| |
| if (*sig || (p && *p) || (args && args->signature)) |
| return FALSE; |
| |
| return TRUE; |
| } |
| |
| static void add_pending(struct generic_data *data) |
| { |
| guint old_id = data->process_id; |
| |
| data->process_id = g_idle_add(process_changes, data); |
| |
| if (old_id > 0) { |
| /* |
| * If the element already had an old idler, remove the old one, |
| * no need to re-add it to the pending list. |
| */ |
| g_source_remove(old_id); |
| return; |
| } |
| |
| pending = g_slist_append(pending, data); |
| } |
| |
| static gboolean remove_interface(struct generic_data *data, const char *name) |
| { |
| struct interface_data *iface; |
| |
| iface = find_interface(data->interfaces, name); |
| if (iface == NULL) |
| return FALSE; |
| |
| process_properties_from_interface(data, iface); |
| |
| data->interfaces = g_slist_remove(data->interfaces, iface); |
| |
| if (iface->destroy) { |
| iface->destroy(iface->user_data); |
| iface->user_data = NULL; |
| } |
| |
| /* |
| * Interface being removed was just added, on the same mainloop |
| * iteration? Don't send any signal |
| */ |
| if (g_slist_find(data->added, iface)) { |
| data->added = g_slist_remove(data->added, iface); |
| g_free(iface->name); |
| g_free(iface); |
| return TRUE; |
| } |
| |
| if (data->parent == NULL) { |
| g_free(iface->name); |
| g_free(iface); |
| return TRUE; |
| } |
| |
| data->removed = g_slist_prepend(data->removed, iface->name); |
| g_free(iface); |
| |
| add_pending(data); |
| |
| return TRUE; |
| } |
| |
| static struct generic_data *invalidate_parent_data(DBusConnection *conn, |
| const char *child_path) |
| { |
| struct generic_data *data = NULL, *child = NULL, *parent = NULL; |
| char *parent_path, *slash; |
| |
| parent_path = g_strdup(child_path); |
| slash = strrchr(parent_path, '/'); |
| if (slash == NULL) |
| goto done; |
| |
| if (slash == parent_path && parent_path[1] != '\0') |
| parent_path[1] = '\0'; |
| else |
| *slash = '\0'; |
| |
| if (!strlen(parent_path)) |
| goto done; |
| |
| if (dbus_connection_get_object_path_data(conn, parent_path, |
| (void *) &data) == FALSE) { |
| goto done; |
| } |
| |
| parent = invalidate_parent_data(conn, parent_path); |
| |
| if (data == NULL) { |
| data = parent; |
| if (data == NULL) |
| goto done; |
| } |
| |
| g_free(data->introspect); |
| data->introspect = NULL; |
| |
| if (!dbus_connection_get_object_path_data(conn, child_path, |
| (void *) &child)) |
| goto done; |
| |
| if (child == NULL || g_slist_find(data->objects, child) != NULL) |
| goto done; |
| |
| data->objects = g_slist_prepend(data->objects, child); |
| child->parent = data; |
| |
| done: |
| g_free(parent_path); |
| return data; |
| } |
| |
| static inline const GDBusPropertyTable *find_property(const GDBusPropertyTable *properties, |
| const char *name) |
| { |
| const GDBusPropertyTable *p; |
| |
| for (p = properties; p && p->name; p++) { |
| if (strcmp(name, p->name) != 0) |
| continue; |
| |
| if (check_experimental(p->flags, |
| G_DBUS_PROPERTY_FLAG_EXPERIMENTAL)) |
| break; |
| |
| if (check_testing(p->flags, G_DBUS_PROPERTY_FLAG_TESTING)) |
| break; |
| |
| return p; |
| } |
| |
| return NULL; |
| } |
| |
| static DBusMessage *properties_get(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| struct interface_data *iface; |
| const GDBusPropertyTable *property; |
| const char *interface, *name; |
| DBusMessageIter iter, value; |
| DBusMessage *reply; |
| |
| if (!dbus_message_get_args(message, NULL, |
| DBUS_TYPE_STRING, &interface, |
| DBUS_TYPE_STRING, &name, |
| DBUS_TYPE_INVALID)) |
| return NULL; |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No such interface '%s'", interface); |
| |
| property = find_property(iface->properties, name); |
| if (property == NULL) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No such property '%s'", name); |
| |
| if (property->exists != NULL && |
| !property->exists(property, iface->user_data)) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No such property '%s'", name); |
| |
| if (property->get == NULL) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "Property '%s' is not readable", name); |
| |
| reply = dbus_message_new_method_return(message); |
| if (reply == NULL) |
| return NULL; |
| |
| dbus_message_iter_init_append(reply, &iter); |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, |
| property->type, &value); |
| |
| if (!property->get(property, &value, iface->user_data)) { |
| dbus_message_unref(reply); |
| return NULL; |
| } |
| |
| dbus_message_iter_close_container(&iter, &value); |
| |
| return reply; |
| } |
| |
| static DBusMessage *properties_get_all(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| struct interface_data *iface; |
| const char *interface; |
| DBusMessageIter iter; |
| DBusMessage *reply; |
| |
| if (!dbus_message_get_args(message, NULL, |
| DBUS_TYPE_STRING, &interface, |
| DBUS_TYPE_INVALID)) |
| return NULL; |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No such interface '%s'", interface); |
| |
| reply = dbus_message_new_method_return(message); |
| if (reply == NULL) |
| return NULL; |
| |
| dbus_message_iter_init_append(reply, &iter); |
| |
| append_properties(iface, &iter); |
| |
| return reply; |
| } |
| |
| static DBusMessage *properties_set(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| DBusMessageIter iter, sub; |
| struct interface_data *iface; |
| const GDBusPropertyTable *property; |
| const char *name, *interface; |
| struct property_data *propdata; |
| gboolean valid_signature; |
| char *signature; |
| |
| if (!dbus_message_iter_init(message, &iter)) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No arguments given"); |
| |
| if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "Invalid argument type: '%c'", |
| dbus_message_iter_get_arg_type(&iter)); |
| |
| dbus_message_iter_get_basic(&iter, &interface); |
| dbus_message_iter_next(&iter); |
| |
| if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "Invalid argument type: '%c'", |
| dbus_message_iter_get_arg_type(&iter)); |
| |
| dbus_message_iter_get_basic(&iter, &name); |
| dbus_message_iter_next(&iter); |
| |
| if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "Invalid argument type: '%c'", |
| dbus_message_iter_get_arg_type(&iter)); |
| |
| dbus_message_iter_recurse(&iter, &sub); |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return g_dbus_create_error(message, DBUS_ERROR_INVALID_ARGS, |
| "No such interface '%s'", interface); |
| |
| property = find_property(iface->properties, name); |
| if (property == NULL) |
| return g_dbus_create_error(message, |
| DBUS_ERROR_UNKNOWN_PROPERTY, |
| "No such property '%s'", name); |
| |
| if (property->set == NULL) |
| return g_dbus_create_error(message, |
| DBUS_ERROR_PROPERTY_READ_ONLY, |
| "Property '%s' is not writable", name); |
| |
| if (property->exists != NULL && |
| !property->exists(property, iface->user_data)) |
| return g_dbus_create_error(message, |
| DBUS_ERROR_UNKNOWN_PROPERTY, |
| "No such property '%s'", name); |
| |
| signature = dbus_message_iter_get_signature(&sub); |
| valid_signature = strcmp(signature, property->type) ? FALSE : TRUE; |
| dbus_free(signature); |
| if (!valid_signature) |
| return g_dbus_create_error(message, |
| DBUS_ERROR_INVALID_SIGNATURE, |
| "Invalid signature for '%s'", name); |
| |
| propdata = g_new(struct property_data, 1); |
| propdata->id = next_pending_property++; |
| propdata->message = dbus_message_ref(message); |
| propdata->conn = connection; |
| pending_property_set = g_slist_prepend(pending_property_set, propdata); |
| |
| property->set(property, &sub, propdata->id, iface->user_data); |
| |
| return NULL; |
| } |
| |
| static const GDBusMethodTable properties_methods[] = { |
| { GDBUS_METHOD("Get", |
| GDBUS_ARGS({ "interface", "s" }, { "name", "s" }), |
| GDBUS_ARGS({ "value", "v" }), |
| properties_get) }, |
| { GDBUS_ASYNC_METHOD("Set", |
| GDBUS_ARGS({ "interface", "s" }, { "name", "s" }, |
| { "value", "v" }), |
| NULL, |
| properties_set) }, |
| { GDBUS_METHOD("GetAll", |
| GDBUS_ARGS({ "interface", "s" }), |
| GDBUS_ARGS({ "properties", "a{sv}" }), |
| properties_get_all) }, |
| { } |
| }; |
| |
| static const GDBusSignalTable properties_signals[] = { |
| { GDBUS_SIGNAL("PropertiesChanged", |
| GDBUS_ARGS({ "interface", "s" }, |
| { "changed_properties", "a{sv}" }, |
| { "invalidated_properties", "as"})) }, |
| { } |
| }; |
| |
| static void append_name(gpointer data, gpointer user_data) |
| { |
| char *name = data; |
| DBusMessageIter *iter = user_data; |
| |
| dbus_message_iter_append_basic(iter, DBUS_TYPE_STRING, &name); |
| } |
| |
| static void emit_interfaces_removed(struct generic_data *data) |
| { |
| DBusMessage *signal; |
| DBusMessageIter iter, array; |
| |
| if (root == NULL || data == root) |
| return; |
| |
| signal = dbus_message_new_signal(root->path, |
| DBUS_INTERFACE_OBJECT_MANAGER, |
| "InterfacesRemoved"); |
| if (signal == NULL) |
| return; |
| |
| dbus_message_iter_init_append(signal, &iter); |
| dbus_message_iter_append_basic(&iter, DBUS_TYPE_OBJECT_PATH, |
| &data->path); |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, |
| DBUS_TYPE_STRING_AS_STRING, &array); |
| |
| g_slist_foreach(data->removed, append_name, &array); |
| g_slist_free_full(data->removed, g_free); |
| data->removed = NULL; |
| |
| dbus_message_iter_close_container(&iter, &array); |
| |
| /* Use dbus_connection_send to avoid recursive calls to g_dbus_flush */ |
| dbus_connection_send(data->conn, signal, NULL); |
| dbus_message_unref(signal); |
| } |
| |
| static void remove_pending(struct generic_data *data) |
| { |
| if (data->process_id > 0) { |
| g_source_remove(data->process_id); |
| data->process_id = 0; |
| } |
| |
| pending = g_slist_remove(pending, data); |
| } |
| |
| static gboolean process_changes(gpointer user_data) |
| { |
| struct generic_data *data = user_data; |
| |
| remove_pending(data); |
| |
| if (data->added != NULL) |
| emit_interfaces_added(data); |
| |
| /* Flush pending properties */ |
| if (data->pending_prop == TRUE) |
| process_property_changes(data); |
| |
| if (data->removed != NULL) |
| emit_interfaces_removed(data); |
| |
| data->process_id = 0; |
| |
| return FALSE; |
| } |
| |
| static void generic_unregister(DBusConnection *connection, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| struct generic_data *parent = data->parent; |
| |
| if (parent != NULL) |
| parent->objects = g_slist_remove(parent->objects, data); |
| |
| if (data->process_id > 0) { |
| g_source_remove(data->process_id); |
| data->process_id = 0; |
| process_changes(data); |
| } |
| |
| g_slist_foreach(data->objects, reset_parent, data->parent); |
| g_slist_free(data->objects); |
| |
| dbus_connection_unref(data->conn); |
| g_free(data->introspect); |
| g_free(data->path); |
| g_free(data); |
| } |
| |
| static DBusHandlerResult generic_message(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| struct interface_data *iface; |
| const GDBusMethodTable *method; |
| const char *interface; |
| |
| interface = dbus_message_get_interface(message); |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| |
| for (method = iface->methods; method && |
| method->name && method->function; method++) { |
| |
| if (dbus_message_is_method_call(message, iface->name, |
| method->name) == FALSE) |
| continue; |
| |
| if (check_experimental(method->flags, |
| G_DBUS_METHOD_FLAG_EXPERIMENTAL)) |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| |
| if (check_testing(method->flags, G_DBUS_METHOD_FLAG_TESTING)) |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| |
| if (g_dbus_args_have_signature(method->in_args, |
| message) == FALSE) |
| continue; |
| |
| if (check_privilege(connection, message, method, |
| iface->user_data) == TRUE) |
| return DBUS_HANDLER_RESULT_HANDLED; |
| |
| return process_message(connection, message, method, |
| iface->user_data); |
| } |
| |
| return DBUS_HANDLER_RESULT_NOT_YET_HANDLED; |
| } |
| |
| static DBusObjectPathVTable generic_table = { |
| .unregister_function = generic_unregister, |
| .message_function = generic_message, |
| }; |
| |
| static const GDBusMethodTable introspect_methods[] = { |
| { GDBUS_METHOD("Introspect", NULL, |
| GDBUS_ARGS({ "xml", "s" }), introspect) }, |
| { } |
| }; |
| |
| static void append_interfaces(struct generic_data *data, DBusMessageIter *iter) |
| { |
| DBusMessageIter array; |
| |
| dbus_message_iter_open_container(iter, DBUS_TYPE_ARRAY, |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_ARRAY_AS_STRING |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_VARIANT_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &array); |
| |
| g_slist_foreach(data->interfaces, append_interface, &array); |
| |
| dbus_message_iter_close_container(iter, &array); |
| } |
| |
| static void append_object(gpointer data, gpointer user_data) |
| { |
| struct generic_data *child = data; |
| DBusMessageIter *array = user_data; |
| DBusMessageIter entry; |
| |
| dbus_message_iter_open_container(array, DBUS_TYPE_DICT_ENTRY, NULL, |
| &entry); |
| dbus_message_iter_append_basic(&entry, DBUS_TYPE_OBJECT_PATH, |
| &child->path); |
| append_interfaces(child, &entry); |
| dbus_message_iter_close_container(array, &entry); |
| |
| g_slist_foreach(child->objects, append_object, user_data); |
| } |
| |
| static DBusMessage *get_objects(DBusConnection *connection, |
| DBusMessage *message, void *user_data) |
| { |
| struct generic_data *data = user_data; |
| DBusMessage *reply; |
| DBusMessageIter iter; |
| DBusMessageIter array; |
| |
| reply = dbus_message_new_method_return(message); |
| if (reply == NULL) |
| return NULL; |
| |
| dbus_message_iter_init_append(reply, &iter); |
| |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_OBJECT_PATH_AS_STRING |
| DBUS_TYPE_ARRAY_AS_STRING |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_ARRAY_AS_STRING |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING |
| DBUS_TYPE_VARIANT_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING, |
| &array); |
| |
| g_slist_foreach(data->objects, append_object, &array); |
| |
| dbus_message_iter_close_container(&iter, &array); |
| |
| return reply; |
| } |
| |
| static const GDBusMethodTable manager_methods[] = { |
| { GDBUS_METHOD("GetManagedObjects", NULL, |
| GDBUS_ARGS({ "objects", "a{oa{sa{sv}}}" }), get_objects) }, |
| { } |
| }; |
| |
| static const GDBusSignalTable manager_signals[] = { |
| { GDBUS_SIGNAL("InterfacesAdded", |
| GDBUS_ARGS({ "object", "o" }, |
| { "interfaces", "a{sa{sv}}" })) }, |
| { GDBUS_SIGNAL("InterfacesRemoved", |
| GDBUS_ARGS({ "object", "o" }, { "interfaces", "as" })) }, |
| { } |
| }; |
| |
| static gboolean add_interface(struct generic_data *data, |
| const char *name, |
| const GDBusMethodTable *methods, |
| const GDBusSignalTable *signals, |
| const GDBusPropertyTable *properties, |
| void *user_data, |
| GDBusDestroyFunction destroy) |
| { |
| struct interface_data *iface; |
| const GDBusMethodTable *method; |
| const GDBusSignalTable *signal; |
| const GDBusPropertyTable *property; |
| |
| for (method = methods; method && method->name; method++) { |
| if (!check_experimental(method->flags, |
| G_DBUS_METHOD_FLAG_EXPERIMENTAL)) |
| goto done; |
| |
| if (!check_testing(method->flags, G_DBUS_METHOD_FLAG_TESTING)) |
| goto done; |
| } |
| |
| for (signal = signals; signal && signal->name; signal++) { |
| if (!check_experimental(signal->flags, |
| G_DBUS_SIGNAL_FLAG_EXPERIMENTAL)) |
| goto done; |
| if (!check_testing(signal->flags, G_DBUS_SIGNAL_FLAG_TESTING)) |
| goto done; |
| } |
| |
| for (property = properties; property && property->name; property++) { |
| if (!check_experimental(property->flags, |
| G_DBUS_PROPERTY_FLAG_EXPERIMENTAL)) |
| goto done; |
| if (!check_testing(property->flags, |
| G_DBUS_PROPERTY_FLAG_TESTING)) |
| goto done; |
| } |
| |
| /* Nothing to register */ |
| return FALSE; |
| |
| done: |
| iface = g_new0(struct interface_data, 1); |
| iface->name = g_strdup(name); |
| iface->methods = methods; |
| iface->signals = signals; |
| iface->properties = properties; |
| iface->user_data = user_data; |
| iface->destroy = destroy; |
| |
| data->interfaces = g_slist_append(data->interfaces, iface); |
| if (data->parent == NULL) |
| return TRUE; |
| |
| data->added = g_slist_append(data->added, iface); |
| |
| add_pending(data); |
| |
| return TRUE; |
| } |
| |
| static struct generic_data *object_path_ref(DBusConnection *connection, |
| const char *path) |
| { |
| struct generic_data *data; |
| |
| if (dbus_connection_get_object_path_data(connection, path, |
| (void *) &data) == TRUE) { |
| if (data != NULL) { |
| data->refcount++; |
| return data; |
| } |
| } |
| |
| data = g_new0(struct generic_data, 1); |
| data->conn = dbus_connection_ref(connection); |
| data->path = g_strdup(path); |
| data->refcount = 1; |
| |
| data->introspect = g_strdup(DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<node></node>"); |
| |
| if (!dbus_connection_register_object_path(connection, path, |
| &generic_table, data)) { |
| dbus_connection_unref(data->conn); |
| g_free(data->path); |
| g_free(data->introspect); |
| g_free(data); |
| return NULL; |
| } |
| |
| invalidate_parent_data(connection, path); |
| |
| add_interface(data, DBUS_INTERFACE_INTROSPECTABLE, introspect_methods, |
| NULL, NULL, data, NULL); |
| |
| return data; |
| } |
| |
| static void object_path_unref(DBusConnection *connection, const char *path) |
| { |
| struct generic_data *data = NULL; |
| |
| if (dbus_connection_get_object_path_data(connection, path, |
| (void *) &data) == FALSE) |
| return; |
| |
| if (data == NULL) |
| return; |
| |
| data->refcount--; |
| |
| if (data->refcount > 0) |
| return; |
| |
| remove_interface(data, DBUS_INTERFACE_INTROSPECTABLE); |
| remove_interface(data, DBUS_INTERFACE_PROPERTIES); |
| |
| invalidate_parent_data(data->conn, data->path); |
| |
| dbus_connection_unregister_object_path(data->conn, data->path); |
| } |
| |
| static gboolean check_signal(DBusConnection *conn, const char *path, |
| const char *interface, const char *name, |
| const GDBusArgInfo **args) |
| { |
| struct generic_data *data = NULL; |
| struct interface_data *iface; |
| const GDBusSignalTable *signal; |
| |
| *args = NULL; |
| if (!dbus_connection_get_object_path_data(conn, path, |
| (void *) &data) || data == NULL) { |
| error("dbus_connection_emit_signal: path %s isn't registered", |
| path); |
| return FALSE; |
| } |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) { |
| error("dbus_connection_emit_signal: %s does not implement %s", |
| path, interface); |
| return FALSE; |
| } |
| |
| for (signal = iface->signals; signal && signal->name; signal++) { |
| if (strcmp(signal->name, name) != 0) |
| continue; |
| |
| if (signal->flags & G_DBUS_SIGNAL_FLAG_EXPERIMENTAL) { |
| const char *env = g_getenv("GDBUS_EXPERIMENTAL"); |
| if (g_strcmp0(env, "1") != 0) |
| break; |
| } |
| |
| *args = signal->args; |
| return TRUE; |
| } |
| |
| error("No signal named %s on interface %s", name, interface); |
| return FALSE; |
| } |
| |
| gboolean g_dbus_register_interface(DBusConnection *connection, |
| const char *path, const char *name, |
| const GDBusMethodTable *methods, |
| const GDBusSignalTable *signals, |
| const GDBusPropertyTable *properties, |
| void *user_data, |
| GDBusDestroyFunction destroy) |
| { |
| struct generic_data *data; |
| |
| if (!dbus_validate_path(path, NULL)) { |
| error("Invalid object path: %s", path); |
| return FALSE; |
| } |
| |
| if (!dbus_validate_interface(name, NULL)) { |
| error("Invalid interface: %s", name); |
| return FALSE; |
| } |
| |
| data = object_path_ref(connection, path); |
| if (data == NULL) |
| return FALSE; |
| |
| if (find_interface(data->interfaces, name)) { |
| object_path_unref(connection, path); |
| return FALSE; |
| } |
| |
| if (!add_interface(data, name, methods, signals, properties, user_data, |
| destroy)) { |
| object_path_unref(connection, path); |
| return FALSE; |
| } |
| |
| if (properties != NULL && !find_interface(data->interfaces, |
| DBUS_INTERFACE_PROPERTIES)) |
| add_interface(data, DBUS_INTERFACE_PROPERTIES, |
| properties_methods, properties_signals, NULL, |
| data, NULL); |
| |
| g_free(data->introspect); |
| data->introspect = NULL; |
| |
| return TRUE; |
| } |
| |
| gboolean g_dbus_unregister_interface(DBusConnection *connection, |
| const char *path, const char *name) |
| { |
| struct generic_data *data = NULL; |
| |
| if (path == NULL) |
| return FALSE; |
| |
| if (dbus_connection_get_object_path_data(connection, path, |
| (void *) &data) == FALSE) |
| return FALSE; |
| |
| if (data == NULL) |
| return FALSE; |
| |
| if (remove_interface(data, name) == FALSE) |
| return FALSE; |
| |
| g_free(data->introspect); |
| data->introspect = NULL; |
| |
| object_path_unref(connection, data->path); |
| |
| return TRUE; |
| } |
| |
| gboolean g_dbus_register_security(const GDBusSecurityTable *security) |
| { |
| if (security_table != NULL) |
| return FALSE; |
| |
| security_table = security; |
| |
| return TRUE; |
| } |
| |
| gboolean g_dbus_unregister_security(const GDBusSecurityTable *security) |
| { |
| security_table = NULL; |
| |
| return TRUE; |
| } |
| |
| DBusMessage *g_dbus_create_error_valist(DBusMessage *message, const char *name, |
| const char *format, va_list args) |
| { |
| char str[1024]; |
| |
| /* Check if the message can be replied */ |
| if (dbus_message_get_no_reply(message)) |
| return NULL; |
| |
| if (format) |
| vsnprintf(str, sizeof(str), format, args); |
| else |
| str[0] = '\0'; |
| |
| return dbus_message_new_error(message, name, str); |
| } |
| |
| DBusMessage *g_dbus_create_error(DBusMessage *message, const char *name, |
| const char *format, ...) |
| { |
| va_list args; |
| DBusMessage *reply; |
| |
| va_start(args, format); |
| |
| reply = g_dbus_create_error_valist(message, name, format, args); |
| |
| va_end(args); |
| |
| return reply; |
| } |
| |
| DBusMessage *g_dbus_create_reply_valist(DBusMessage *message, |
| int type, va_list args) |
| { |
| DBusMessage *reply; |
| |
| /* Check if the message can be replied */ |
| if (dbus_message_get_no_reply(message)) |
| return NULL; |
| |
| reply = dbus_message_new_method_return(message); |
| if (reply == NULL) |
| return NULL; |
| |
| if (dbus_message_append_args_valist(reply, type, args) == FALSE) { |
| dbus_message_unref(reply); |
| return NULL; |
| } |
| |
| return reply; |
| } |
| |
| DBusMessage *g_dbus_create_reply(DBusMessage *message, int type, ...) |
| { |
| va_list args; |
| DBusMessage *reply; |
| |
| va_start(args, type); |
| |
| reply = g_dbus_create_reply_valist(message, type, args); |
| |
| va_end(args); |
| |
| return reply; |
| } |
| |
| static void g_dbus_flush(DBusConnection *connection) |
| { |
| GSList *l; |
| |
| for (l = pending; l;) { |
| struct generic_data *data = l->data; |
| |
| l = l->next; |
| if (data->conn != connection) |
| continue; |
| |
| process_changes(data); |
| } |
| } |
| |
| gboolean g_dbus_send_message(DBusConnection *connection, DBusMessage *message) |
| { |
| dbus_bool_t result = FALSE; |
| |
| if (!message) |
| return FALSE; |
| |
| if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL) |
| dbus_message_set_no_reply(message, TRUE); |
| else if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_SIGNAL) { |
| const char *path = dbus_message_get_path(message); |
| const char *interface = dbus_message_get_interface(message); |
| const char *name = dbus_message_get_member(message); |
| const GDBusArgInfo *args; |
| |
| if (!check_signal(connection, path, interface, name, &args)) |
| goto out; |
| } |
| |
| /* Flush pending signal to guarantee message order */ |
| g_dbus_flush(connection); |
| |
| result = dbus_connection_send(connection, message, NULL); |
| |
| out: |
| dbus_message_unref(message); |
| |
| return result; |
| } |
| |
| gboolean g_dbus_send_message_with_reply(DBusConnection *connection, |
| DBusMessage *message, |
| DBusPendingCall **call, int timeout) |
| { |
| dbus_bool_t ret; |
| |
| /* Flush pending signal to guarantee message order */ |
| g_dbus_flush(connection); |
| |
| ret = dbus_connection_send_with_reply(connection, message, call, |
| timeout); |
| |
| if (ret == TRUE && call != NULL && *call == NULL) { |
| error("Unable to send message (passing fd blocked?)"); |
| return FALSE; |
| } |
| |
| return ret; |
| } |
| |
| gboolean g_dbus_send_error_valist(DBusConnection *connection, |
| DBusMessage *message, const char *name, |
| const char *format, va_list args) |
| { |
| DBusMessage *error; |
| |
| error = g_dbus_create_error_valist(message, name, format, args); |
| if (error == NULL) |
| return FALSE; |
| |
| return g_dbus_send_message(connection, error); |
| } |
| |
| gboolean g_dbus_send_error(DBusConnection *connection, DBusMessage *message, |
| const char *name, const char *format, ...) |
| { |
| va_list args; |
| gboolean result; |
| |
| va_start(args, format); |
| |
| result = g_dbus_send_error_valist(connection, message, name, |
| format, args); |
| |
| va_end(args); |
| |
| return result; |
| } |
| |
| gboolean g_dbus_send_reply_valist(DBusConnection *connection, |
| DBusMessage *message, int type, va_list args) |
| { |
| DBusMessage *reply; |
| |
| reply = g_dbus_create_reply_valist(message, type, args); |
| if (!reply) |
| return FALSE; |
| |
| return g_dbus_send_message(connection, reply); |
| } |
| |
| gboolean g_dbus_send_reply(DBusConnection *connection, |
| DBusMessage *message, int type, ...) |
| { |
| va_list args; |
| gboolean result; |
| |
| va_start(args, type); |
| |
| result = g_dbus_send_reply_valist(connection, message, type, args); |
| |
| va_end(args); |
| |
| return result; |
| } |
| |
| gboolean g_dbus_emit_signal(DBusConnection *connection, |
| const char *path, const char *interface, |
| const char *name, int type, ...) |
| { |
| va_list args; |
| gboolean result; |
| |
| va_start(args, type); |
| |
| result = g_dbus_emit_signal_valist(connection, path, interface, |
| name, type, args); |
| |
| va_end(args); |
| |
| return result; |
| } |
| |
| gboolean g_dbus_emit_signal_valist(DBusConnection *connection, |
| const char *path, const char *interface, |
| const char *name, int type, va_list args) |
| { |
| DBusMessage *signal; |
| dbus_bool_t ret; |
| const GDBusArgInfo *args_info; |
| |
| if (!check_signal(connection, path, interface, name, &args_info)) |
| return FALSE; |
| |
| signal = dbus_message_new_signal(path, interface, name); |
| if (signal == NULL) { |
| error("Unable to allocate new %s.%s signal", interface, name); |
| return FALSE; |
| } |
| |
| ret = dbus_message_append_args_valist(signal, type, args); |
| if (!ret) |
| goto fail; |
| |
| if (g_dbus_args_have_signature(args_info, signal) == FALSE) { |
| error("%s.%s: got unexpected signature '%s'", interface, name, |
| dbus_message_get_signature(signal)); |
| ret = FALSE; |
| goto fail; |
| } |
| |
| return g_dbus_send_message(connection, signal); |
| |
| fail: |
| dbus_message_unref(signal); |
| |
| return ret; |
| } |
| |
| static void process_properties_from_interface(struct generic_data *data, |
| struct interface_data *iface) |
| { |
| GSList *l; |
| DBusMessage *signal; |
| DBusMessageIter iter, dict, array; |
| GSList *invalidated; |
| |
| if (iface->pending_prop == NULL) |
| return; |
| |
| signal = dbus_message_new_signal(data->path, |
| DBUS_INTERFACE_PROPERTIES, "PropertiesChanged"); |
| if (signal == NULL) { |
| error("Unable to allocate new " DBUS_INTERFACE_PROPERTIES |
| ".PropertiesChanged signal"); |
| return; |
| } |
| |
| iface->pending_prop = g_slist_reverse(iface->pending_prop); |
| |
| dbus_message_iter_init_append(signal, &iter); |
| dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &iface->name); |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, |
| DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING |
| DBUS_TYPE_STRING_AS_STRING DBUS_TYPE_VARIANT_AS_STRING |
| DBUS_DICT_ENTRY_END_CHAR_AS_STRING, &dict); |
| |
| invalidated = NULL; |
| |
| for (l = iface->pending_prop; l != NULL; l = l->next) { |
| GDBusPropertyTable *p = l->data; |
| |
| if (p->get == NULL) |
| continue; |
| |
| if (p->exists != NULL && !p->exists(p, iface->user_data)) { |
| invalidated = g_slist_prepend(invalidated, p); |
| continue; |
| } |
| |
| append_property(iface, p, &dict); |
| } |
| |
| dbus_message_iter_close_container(&iter, &dict); |
| |
| dbus_message_iter_open_container(&iter, DBUS_TYPE_ARRAY, |
| DBUS_TYPE_STRING_AS_STRING, &array); |
| for (l = invalidated; l != NULL; l = g_slist_next(l)) { |
| GDBusPropertyTable *p = l->data; |
| |
| dbus_message_iter_append_basic(&array, DBUS_TYPE_STRING, |
| &p->name); |
| } |
| g_slist_free(invalidated); |
| dbus_message_iter_close_container(&iter, &array); |
| |
| g_slist_free(iface->pending_prop); |
| iface->pending_prop = NULL; |
| |
| /* Use dbus_connection_send to avoid recursive calls to g_dbus_flush */ |
| dbus_connection_send(data->conn, signal, NULL); |
| dbus_message_unref(signal); |
| } |
| |
| static void process_property_changes(struct generic_data *data) |
| { |
| GSList *l; |
| |
| data->pending_prop = FALSE; |
| |
| for (l = data->interfaces; l != NULL; l = l->next) { |
| struct interface_data *iface = l->data; |
| |
| process_properties_from_interface(data, iface); |
| } |
| } |
| |
| void g_dbus_emit_property_changed_full(DBusConnection *connection, |
| const char *path, const char *interface, |
| const char *name, |
| GDbusPropertyChangedFlags flags) |
| { |
| const GDBusPropertyTable *property; |
| struct generic_data *data; |
| struct interface_data *iface; |
| |
| if (path == NULL) |
| return; |
| |
| if (!dbus_connection_get_object_path_data(connection, path, |
| (void **) &data) || data == NULL) |
| return; |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return; |
| |
| /* |
| * If ObjectManager is attached, don't emit property changed if |
| * interface is not yet published |
| */ |
| if (root && g_slist_find(data->added, iface)) |
| return; |
| |
| property = find_property(iface->properties, name); |
| if (property == NULL) { |
| error("Could not find property %s in %p", name, |
| iface->properties); |
| return; |
| } |
| |
| if (g_slist_find(iface->pending_prop, (void *) property) != NULL) |
| return; |
| |
| data->pending_prop = TRUE; |
| iface->pending_prop = g_slist_prepend(iface->pending_prop, |
| (void *) property); |
| |
| if (flags & G_DBUS_PROPERTY_CHANGED_FLAG_FLUSH) |
| process_property_changes(data); |
| else |
| add_pending(data); |
| } |
| |
| void g_dbus_emit_property_changed(DBusConnection *connection, const char *path, |
| const char *interface, const char *name) |
| { |
| g_dbus_emit_property_changed_full(connection, path, interface, name, 0); |
| } |
| |
| gboolean g_dbus_get_properties(DBusConnection *connection, const char *path, |
| const char *interface, DBusMessageIter *iter) |
| { |
| struct generic_data *data; |
| struct interface_data *iface; |
| |
| if (path == NULL) |
| return FALSE; |
| |
| if (!dbus_connection_get_object_path_data(connection, path, |
| (void **) &data) || data == NULL) |
| return FALSE; |
| |
| iface = find_interface(data->interfaces, interface); |
| if (iface == NULL) |
| return FALSE; |
| |
| append_properties(iface, iter); |
| |
| return TRUE; |
| } |
| |
| gboolean g_dbus_attach_object_manager(DBusConnection *connection) |
| { |
| struct generic_data *data; |
| |
| data = object_path_ref(connection, "/"); |
| if (data == NULL) |
| return FALSE; |
| |
| add_interface(data, DBUS_INTERFACE_OBJECT_MANAGER, |
| manager_methods, manager_signals, |
| NULL, data, NULL); |
| root = data; |
| |
| return TRUE; |
| } |
| |
| gboolean g_dbus_detach_object_manager(DBusConnection *connection) |
| { |
| if (!g_dbus_unregister_interface(connection, "/", |
| DBUS_INTERFACE_OBJECT_MANAGER)) |
| return FALSE; |
| |
| root = NULL; |
| |
| return TRUE; |
| } |
| |
| void g_dbus_set_flags(int flags) |
| { |
| global_flags = flags; |
| } |
| |
| int g_dbus_get_flags(void) |
| { |
| return global_flags; |
| } |