blob: 444728c756ddc7b47aea98147476c1a874f4c64f [file] [log] [blame]
/*
*
* D-Bus helper library
*
* Copyright (C) 2004-2011 Marcel Holtmann <marcel@holtmann.org>
*
*
* 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <string.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"
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 {
GDBusPendingPropertySet id;
DBusMessage *message;
};
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,
"\t\t\t<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(prefix_, name_, value_) \
prefix_ "<annotation name=\"org.freedesktop.DBus." name_ "\" " \
"value=\"" value_ "\"/>\n"
#define G_DBUS_ANNOTATE_DEPRECATED(prefix_) \
G_DBUS_ANNOTATE(prefix_, "Deprecated", "true")
#define G_DBUS_ANNOTATE_NOREPLY(prefix_) \
G_DBUS_ANNOTATE(prefix_, "Method.NoReply", "true")
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++) {
gboolean deprecated = method->flags &
G_DBUS_METHOD_FLAG_DEPRECATED;
gboolean noreply = method->flags &
G_DBUS_METHOD_FLAG_NOREPLY;
if (!deprecated && !noreply &&
!(method->in_args && method->in_args->name) &&
!(method->out_args && method->out_args->name))
g_string_append_printf(gstr,
"\t\t<method name=\"%s\"/>\n",
method->name);
else {
g_string_append_printf(gstr,
"\t\t<method name=\"%s\">\n",
method->name);
print_arguments(gstr, method->in_args, "in");
print_arguments(gstr, method->out_args, "out");
if (deprecated)
g_string_append_printf(gstr,
G_DBUS_ANNOTATE_DEPRECATED("\t\t\t"));
if (noreply)
g_string_append_printf(gstr,
G_DBUS_ANNOTATE_NOREPLY("\t\t\t"));
g_string_append_printf(gstr, "\t\t</method>\n");
}
}
for (signal = iface->signals; signal && signal->name; signal++) {
gboolean deprecated = signal->flags &
G_DBUS_SIGNAL_FLAG_DEPRECATED;
if (!deprecated && !(signal->args && signal->args->name))
g_string_append_printf(gstr,
"\t\t<signal name=\"%s\"/>\n",
signal->name);
else {
g_string_append_printf(gstr,
"\t\t<signal name=\"%s\">\n",
signal->name);
print_arguments(gstr, signal->args, NULL);
if (deprecated)
g_string_append_printf(gstr,
G_DBUS_ANNOTATE_DEPRECATED("\t\t\t"));
g_string_append_printf(gstr, "\t\t</signal>\n");
}
}
for (property = iface->properties; property && property->name;
property++) {
gboolean deprecated = property->flags &
G_DBUS_PROPERTY_FLAG_DEPRECATED;
g_string_append_printf(gstr, "\t\t<property name=\"%s\""
" type=\"%s\" access=\"%s%s\"",
property->name, property->type,
property->get ? "read" : "",
property->set ? "write" : "");
if (!deprecated)
g_string_append_printf(gstr, "/>\n");
else
g_string_append_printf(gstr,
G_DBUS_ANNOTATE_DEPRECATED(">\n\t\t\t"));
}
}
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>\n");
for (list = data->interfaces; list; list = list->next) {
struct interface_data *iface = list->data;
g_string_append_printf(gstr, "\t<interface name=\"%s\">\n",
iface->name);
generate_interface_xml(gstr, iface);
g_string_append_printf(gstr, "\t</interface>\n");
}
if (!dbus_connection_list_registered(conn, path, &children))
goto done;
for (i = 0; children[i]; i++)
g_string_append_printf(gstr, "\t<node name=\"%s\"/>\n",
children[i]);
dbus_free_string_array(children);
done:
g_string_append_printf(gstr, "</node>\n");
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) {
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;
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(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;
DBusMessage *reply;
if (secdata->pending != pending)
continue;
pending_security = g_slist_remove(pending_security, secdata);
reply = g_dbus_create_error_valist(secdata->message,
name, format, args);
if (reply != NULL) {
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(reply);
}
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;
}
if (l == NULL)
return NULL;
pending_property_set = g_slist_delete_link(pending_property_set, l);
return propdata;
}
void g_dbus_pending_property_success(DBusConnection *connection,
GDBusPendingPropertySet id)
{
struct property_data *propdata;
propdata = remove_pending_property_data(id);
if (propdata == NULL)
return;
g_dbus_send_reply(connection, propdata->message, DBUS_TYPE_INVALID);
dbus_message_unref(propdata->message);
g_free(propdata);
}
void g_dbus_pending_property_error_valist(DBusConnection *connection,
GDBusPendingReply id, const char *name,
const char *format, va_list args)
{
struct property_data *propdata;
DBusMessage *reply;
propdata = remove_pending_property_data(id);
if (propdata == NULL)
return;
reply = g_dbus_create_error_valist(propdata->message, name, format,
args);
if (reply != NULL) {
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(reply);
}
dbus_message_unref(propdata->message);
g_free(propdata);
}
void g_dbus_pending_property_error(DBusConnection *connection,
GDBusPendingReply id, const char *name,
const char *format, ...)
{
va_list args;
va_start(args, format);
g_dbus_pending_property_error_valist(connection, 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 (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;
struct generic_data *parent = data->parent;
if (parent == NULL)
return;
/* Find root data */
while (parent->parent)
parent = parent->parent;
signal = dbus_message_new_signal(parent->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);
g_dbus_send_message(data->conn, 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 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;
data->interfaces = g_slist_remove(data->interfaces, iface);
if (iface->destroy) {
iface->destroy(iface->user_data);
iface->user_data = NULL;
}
if (data->parent == NULL) {
g_free(iface->name);
g_free(iface);
return TRUE;
}
/*
* 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;
}
data->removed = g_slist_prepend(data->removed, iface->name);
g_free(iface);
if (data->process_id > 0)
return TRUE;
data->process_id = g_idle_add(process_changes, 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)
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;
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, &name);
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, &interface);
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);
propdata = g_new(struct property_data, 1);
propdata->id = next_pending_property++;
propdata->message = dbus_message_ref(message);
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", NULL,
GDBUS_ARGS({ "interface", "s" }, { "name", "s" },
{ "value", "v" }),
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;
struct generic_data *parent = data->parent;
if (parent == NULL)
return;
/* Find root data */
while (parent->parent)
parent = parent->parent;
signal = dbus_message_new_signal(parent->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);
g_dbus_send_message(data->conn, signal);
}
static gboolean process_changes(gpointer user_data)
{
struct generic_data *data = user_data;
data->process_id = 0;
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);
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);
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 (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 void 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;
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;
data->added = g_slist_append(data->added, iface);
if (data->process_id > 0)
return;
data->process_id = g_idle_add(process_changes, data);
}
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)) {
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);
/* Only root path export ObjectManager interface */
if (data->parent == NULL)
add_interface(data, DBUS_INTERFACE_OBJECT_MANAGER,
manager_methods, manager_signals,
NULL, data, NULL);
add_interface(data, DBUS_INTERFACE_PROPERTIES, properties_methods,
properties_signals, 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);
remove_interface(data, DBUS_INTERFACE_OBJECT_MANAGER);
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)) {
*args = signal->args;
return TRUE;
}
}
error("No signal named %s on interface %s", name, interface);
return FALSE;
}
static dbus_bool_t emit_signal_valist(DBusConnection *conn,
const char *path,
const char *interface,
const char *name,
int first,
va_list var_args)
{
DBusMessage *signal;
dbus_bool_t ret;
const GDBusArgInfo *args;
if (!check_signal(conn, path, interface, name, &args))
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, first, var_args);
if (!ret)
goto fail;
if (g_dbus_args_have_signature(args, signal) == FALSE) {
error("%s.%s: got unexpected signature '%s'", interface, name,
dbus_message_get_signature(signal));
ret = FALSE;
goto fail;
}
ret = dbus_connection_send(conn, signal, NULL);
fail:
dbus_message_unref(signal);
return ret;
}
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;
data = object_path_ref(connection, path);
if (data == NULL)
return FALSE;
if (find_interface(data->interfaces, name)) {
object_path_unref(connection, path);
return FALSE;
}
add_interface(data, name, methods, signals, properties, user_data,
destroy);
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];
vsnprintf(str, sizeof(str), format, args);
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;
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;
}
gboolean g_dbus_send_message(DBusConnection *connection, DBusMessage *message)
{
dbus_bool_t result;
if (dbus_message_get_type(message) == DBUS_MESSAGE_TYPE_METHOD_CALL)
dbus_message_set_no_reply(message, TRUE);
result = dbus_connection_send(connection, message, NULL);
dbus_message_unref(message);
return result;
}
gboolean g_dbus_send_reply_valist(DBusConnection *connection,
DBusMessage *message, int type, va_list args)
{
DBusMessage *reply;
reply = dbus_message_new_method_return(message);
if (reply == NULL)
return FALSE;
if (dbus_message_append_args_valist(reply, type, args) == FALSE) {
dbus_message_unref(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 = 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)
{
return emit_signal_valist(connection, path, interface,
name, type, args);
}
static void process_properties_from_interface(struct generic_data *data,
struct interface_data *iface)
{
GSList *l;
DBusMessage *signal;
DBusMessageIter iter, dict, array;
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);
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))
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);
dbus_message_iter_close_container(&iter, &array);
g_dbus_send_message(data->conn, signal);
g_slist_free(iface->pending_prop);
iface->pending_prop = NULL;
}
static void process_property_changes(struct generic_data *data)
{
GSList *l;
for (l = data->interfaces; l != NULL; l = l->next) {
struct interface_data *iface = l->data;
process_properties_from_interface(data, iface);
}
data->pending_prop = FALSE;
}
void g_dbus_emit_property_changed(DBusConnection *connection,
const char *path, const char *interface,
const char *name)
{
const GDBusPropertyTable *property;
struct generic_data *data;
struct interface_data *iface;
if (!dbus_connection_get_object_path_data(connection, path,
(void **) &data) || data == NULL)
return;
iface = find_interface(data->interfaces, interface);
if (iface == NULL)
return;
property = find_property(iface->properties, name);
if (property == NULL) {
error("Could not find property %s in %p", name,
iface->properties);
return;
}
data->pending_prop = TRUE;
iface->pending_prop = g_slist_prepend(iface->pending_prop,
(void *) property);
if (!data->process_id) {
data->process_id = g_idle_add(process_changes, data);
return;
}
}