2009-07-31 00:48:20 +03:00
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/* -*- Mode: C ; c-basic-offset: 2 -*- */
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/*
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* LADI Session Handler (ladish)
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*
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* Copyright (C) 2008, 2009 Nedko Arnaudov <nedko@arnaudov.name>
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* Copyright (C) 2008 Juuso Alasuutari <juuso.alasuutari@gmail.com>
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*
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**************************************************************************
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* This file contains code of the D-Bus helpers
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**************************************************************************
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*
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2009-09-05 00:11:33 +03:00
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* Licensed under the Academic Free License version 2.1
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*
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2009-07-31 00:48:20 +03:00
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* LADI Session Handler is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* LADI Session Handler is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
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* or write to the Free Software Foundation, Inc.,
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* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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2009-08-09 22:19:32 +03:00
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#include <stdbool.h>
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#include <dbus/dbus.h>
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#include <string.h>
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#include <assert.h>
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#include "helpers.h"
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#include "method.h"
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#include "../common/debug.h"
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DBusConnection * g_dbus_connection;
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DBusError g_dbus_error;
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2009-09-05 18:31:25 +03:00
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bool dbus_iter_get_dict_entry(DBusMessageIter * iter, const char ** key_ptr, void * value_ptr, int * type_ptr, int * size_ptr)
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{
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if (!iter || !key_ptr || !value_ptr || !type_ptr) {
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lash_error("Invalid arguments");
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return false;
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}
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DBusMessageIter dict_iter, variant_iter;
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if (dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_DICT_ENTRY) {
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lash_error("Iterator does not point to a dict entry container");
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return false;
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}
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dbus_message_iter_recurse(iter, &dict_iter);
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if (dbus_message_iter_get_arg_type(&dict_iter) != DBUS_TYPE_STRING) {
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lash_error("Cannot find key in dict entry container");
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return false;
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}
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dbus_message_iter_get_basic(&dict_iter, key_ptr);
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if (!dbus_message_iter_next(&dict_iter)
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|| dbus_message_iter_get_arg_type(&dict_iter) != DBUS_TYPE_VARIANT) {
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lash_error("Cannot find variant container in dict entry");
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return false;
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}
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dbus_message_iter_recurse(&dict_iter, &variant_iter);
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*type_ptr = dbus_message_iter_get_arg_type(&variant_iter);
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if (*type_ptr == DBUS_TYPE_INVALID) {
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lash_error("Cannot find value in variant container");
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return false;
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}
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if (*type_ptr == DBUS_TYPE_ARRAY) {
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DBusMessageIter array_iter;
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int n;
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if (dbus_message_iter_get_element_type(&variant_iter)
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!= DBUS_TYPE_BYTE) {
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lash_error("Dict entry value is a non-byte array");
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return false;
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}
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*type_ptr = '-';
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dbus_message_iter_recurse(&variant_iter, &array_iter);
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dbus_message_iter_get_fixed_array(&array_iter, value_ptr, &n);
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if (size_ptr)
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*size_ptr = n;
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} else
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dbus_message_iter_get_basic(&variant_iter, value_ptr);
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return true;
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}
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/*
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* Append a variant type to a D-Bus message.
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* Return false if something fails, true otherwise.
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*/
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bool dbus_iter_append_variant(DBusMessageIter * iter, int type, const void * arg)
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{
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DBusMessageIter sub_iter;
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char s[2];
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s[0] = (char)type;
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s[1] = '\0';
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/* Open a variant container. */
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT, (const char *)s, &sub_iter))
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return false;
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/* Append the supplied value. */
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if (!dbus_message_iter_append_basic(&sub_iter, type, arg))
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{
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dbus_message_iter_close_container(iter, &sub_iter);
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return false;
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}
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/* Close the container. */
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if (!dbus_message_iter_close_container(iter, &sub_iter))
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return false;
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return true;
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}
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static __inline__ bool dbus_iter_append_variant_raw(DBusMessageIter * iter, const void * buf, int len)
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{
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DBusMessageIter variant_iter, array_iter;
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/* Open a variant container. */
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_VARIANT,
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"ay", &variant_iter))
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return false;
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/* Open an array container. */
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if (!dbus_message_iter_open_container(&variant_iter, DBUS_TYPE_ARRAY,
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"y", &array_iter))
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goto fail;
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/* Append the supplied data. */
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if (!dbus_message_iter_append_fixed_array(&array_iter, DBUS_TYPE_BYTE, buf, len)) {
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dbus_message_iter_close_container(&variant_iter, &array_iter);
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goto fail;
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}
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/* Close the containers. */
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if (!dbus_message_iter_close_container(&variant_iter, &array_iter))
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goto fail;
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else if (!dbus_message_iter_close_container(iter, &variant_iter))
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return false;
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return true;
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fail:
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dbus_message_iter_close_container(iter, &variant_iter);
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return false;
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}
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bool dbus_iter_append_dict_entry(DBusMessageIter * iter, int type, const char * key, const void * value, int length)
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{
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DBusMessageIter dict_iter;
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if (!dbus_message_iter_open_container(iter, DBUS_TYPE_DICT_ENTRY, NULL, &dict_iter))
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return false;
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if (!dbus_message_iter_append_basic(&dict_iter, DBUS_TYPE_STRING, &key))
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goto fail;
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if (type == '-')
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{
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if (!dbus_iter_append_variant_raw(&dict_iter, value, length))
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goto fail;
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}
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else if (!dbus_iter_append_variant(&dict_iter, type, value))
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{
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goto fail;
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}
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if (!dbus_message_iter_close_container(iter, &dict_iter))
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return false;
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return true;
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fail:
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dbus_message_iter_close_container(iter, &dict_iter);
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return false;
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}
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2009-07-31 00:48:20 +03:00
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bool dbus_maybe_add_dict_entry_string(DBusMessageIter *dict_iter_ptr, const char * key, const char * value)
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{
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DBusMessageIter dict_entry_iter;
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if (value == NULL)
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{
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return true;
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}
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if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
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{
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return false;
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}
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if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
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{
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dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
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return false;
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}
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2009-09-05 18:31:25 +03:00
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dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_STRING, &value);
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2009-07-31 00:48:20 +03:00
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if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
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{
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return false;
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}
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return true;
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}
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bool dbus_add_dict_entry_uint32(DBusMessageIter * dict_iter_ptr, const char * key, dbus_uint32_t value)
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{
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DBusMessageIter dict_entry_iter;
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if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
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{
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return false;
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}
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if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
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{
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dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
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return false;
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}
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2009-09-05 18:31:25 +03:00
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dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_UINT32, &value);
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2009-07-31 00:48:20 +03:00
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if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
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{
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return false;
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}
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return true;
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}
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bool dbus_add_dict_entry_bool(DBusMessageIter * dict_iter_ptr, const char * key, dbus_bool_t value)
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{
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DBusMessageIter dict_entry_iter;
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if (!dbus_message_iter_open_container(dict_iter_ptr, DBUS_TYPE_DICT_ENTRY, NULL, &dict_entry_iter))
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{
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return false;
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}
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if (!dbus_message_iter_append_basic(&dict_entry_iter, DBUS_TYPE_STRING, (const void *) &key))
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{
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dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter);
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return false;
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}
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2009-09-05 18:31:25 +03:00
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dbus_iter_append_variant(&dict_entry_iter, DBUS_TYPE_BOOLEAN, &value);
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2009-07-31 00:48:20 +03:00
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if (!dbus_message_iter_close_container(dict_iter_ptr, &dict_entry_iter))
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{
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return false;
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}
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return true;
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}
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2009-08-09 22:19:32 +03:00
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bool
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2009-09-05 19:04:56 +03:00
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dbus_call(
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2009-08-09 22:19:32 +03:00
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const char * service,
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const char * object,
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const char * iface,
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const char * method,
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2009-09-05 19:04:56 +03:00
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const char * input_signature,
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2009-08-09 22:19:32 +03:00
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...)
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{
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DBusMessageIter iter;
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DBusMessage * request_ptr;
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DBusMessage * reply_ptr;
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const char * output_signature;
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const char * reply_signature;
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va_list ap;
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bool ret;
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void * parameter_ptr;
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int type;
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DBusSignatureIter sig_iter;
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2009-09-05 19:04:56 +03:00
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//lash_info("dbus_call('%s', '%s', '%s', '%s')", service, object, iface, method);
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2009-08-09 22:19:32 +03:00
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ret = false;
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va_start(ap, input_signature);
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2009-09-05 19:19:55 +03:00
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if (input_signature != NULL)
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2009-08-09 22:19:32 +03:00
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{
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2009-09-05 19:19:55 +03:00
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if (!dbus_signature_validate(input_signature, NULL))
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2009-08-09 22:19:32 +03:00
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{
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2009-09-05 19:19:55 +03:00
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lash_error("input signature '%s' is invalid", input_signature);
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2009-08-09 22:19:32 +03:00
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goto fail;
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}
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2009-09-05 19:19:55 +03:00
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dbus_signature_iter_init(&sig_iter, input_signature);
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2009-08-09 22:19:32 +03:00
|
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2009-09-05 19:19:55 +03:00
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request_ptr = dbus_message_new_method_call(service, object, iface, method);
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if (request_ptr == NULL)
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2009-08-09 22:19:32 +03:00
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{
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2009-09-05 19:19:55 +03:00
|
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lash_error("dbus_message_new_method_call() failed.");
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2009-08-09 22:19:32 +03:00
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goto fail;
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}
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2009-09-05 19:19:55 +03:00
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dbus_message_iter_init_append(request_ptr, &iter);
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|
|
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while (*input_signature != '\0')
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{
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type = dbus_signature_iter_get_current_type(&sig_iter);
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if (!dbus_type_is_basic(type))
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{
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lash_error("non-basic input parameter '%c' (%d)", *input_signature, type);
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goto fail;
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}
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|
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parameter_ptr = va_arg(ap, void *);
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if (!dbus_message_iter_append_basic(&iter, type, parameter_ptr))
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{
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lash_error("dbus_message_iter_append_basic() failed.");
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goto fail;
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}
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dbus_signature_iter_next(&sig_iter);
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input_signature++;
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}
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}
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|
else
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{
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|
|
request_ptr = va_arg(ap, DBusMessage *);
|
2009-08-09 22:19:32 +03:00
|
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}
|
|
|
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|
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output_signature = va_arg(ap, const char *);
|
|
|
|
|
|
|
|
reply_ptr = dbus_connection_send_with_reply_and_block(
|
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|
|
g_dbus_connection,
|
|
|
|
request_ptr,
|
|
|
|
DBUS_CALL_DEFAULT_TIMEOUT,
|
|
|
|
&g_dbus_error);
|
|
|
|
|
2009-09-05 19:19:55 +03:00
|
|
|
if (input_signature != NULL)
|
|
|
|
{
|
|
|
|
dbus_message_unref(request_ptr);
|
|
|
|
}
|
2009-08-09 22:19:32 +03:00
|
|
|
|
|
|
|
if (reply_ptr == NULL)
|
|
|
|
{
|
|
|
|
lash_error("calling method '%s' failed, error is '%s'", method, g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
if (output_signature != NULL)
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
2009-08-10 02:18:55 +03:00
|
|
|
reply_signature = dbus_message_get_signature(reply_ptr);
|
|
|
|
|
|
|
|
if (strcmp(reply_signature, output_signature) != 0)
|
|
|
|
{
|
|
|
|
lash_error("reply signature is '%s' but expected signature is '%s'", reply_signature, output_signature);
|
|
|
|
}
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
dbus_message_iter_init(reply_ptr, &iter);
|
2009-08-09 22:19:32 +03:00
|
|
|
|
2009-08-10 02:18:55 +03:00
|
|
|
while (*output_signature++ != '\0')
|
|
|
|
{
|
|
|
|
assert(dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_INVALID); /* we've checked the signature, this should not happen */
|
|
|
|
parameter_ptr = va_arg(ap, void *);
|
|
|
|
dbus_message_iter_get_basic(&iter, parameter_ptr);
|
|
|
|
dbus_message_iter_next(&iter);
|
|
|
|
}
|
|
|
|
|
|
|
|
assert(dbus_message_iter_get_arg_type(&iter) == DBUS_TYPE_INVALID); /* we've checked the signature, this should not happen */
|
|
|
|
}
|
|
|
|
else
|
2009-08-09 22:19:32 +03:00
|
|
|
{
|
2009-08-10 02:18:55 +03:00
|
|
|
parameter_ptr = va_arg(ap, DBusMessage **);
|
|
|
|
*(DBusMessage **)parameter_ptr = reply_ptr;
|
2009-08-09 22:19:32 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = true;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
va_end(ap);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2009-08-20 00:51:27 +03:00
|
|
|
static
|
|
|
|
const char *
|
|
|
|
compose_signal_match(
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * signal)
|
|
|
|
{
|
|
|
|
static char rule[1024];
|
|
|
|
snprintf(rule, sizeof(rule), "type='signal',sender='%s',path='%s',interface='%s',member='%s'", service, object, iface, signal);
|
|
|
|
return rule;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
dbus_register_object_signal_handler(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * const * signals,
|
|
|
|
DBusHandleMessageFunction handler,
|
|
|
|
void * handler_data)
|
|
|
|
{
|
|
|
|
const char * const * signal;
|
|
|
|
|
|
|
|
for (signal = signals; *signal != NULL; signal++)
|
|
|
|
{
|
|
|
|
dbus_bus_add_match(connection, compose_signal_match(service, object, iface, *signal), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
lash_error("Failed to add D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_connection_add_filter(g_dbus_connection, handler, handler_data, NULL);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool
|
|
|
|
dbus_unregister_object_signal_handler(
|
|
|
|
DBusConnection * connection,
|
|
|
|
const char * service,
|
|
|
|
const char * object,
|
|
|
|
const char * iface,
|
|
|
|
const char * const * signals,
|
|
|
|
DBusHandleMessageFunction handler,
|
|
|
|
void * handler_data)
|
|
|
|
{
|
|
|
|
const char * const * signal;
|
|
|
|
|
|
|
|
for (signal = signals; *signal != NULL; signal++)
|
|
|
|
{
|
|
|
|
dbus_bus_remove_match(connection, compose_signal_match(service, object, iface, *signal), &g_dbus_error);
|
|
|
|
if (dbus_error_is_set(&g_dbus_error))
|
|
|
|
{
|
|
|
|
lash_error("Failed to add D-Bus match rule: %s", g_dbus_error.message);
|
|
|
|
dbus_error_free(&g_dbus_error);
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
dbus_connection_remove_filter(g_dbus_connection, handler, handler_data);
|
|
|
|
|
|
|
|
return true;
|
|
|
|
}
|