/**
 * Cancels a running synchronization session with a device at any time.
 *
 * @param client The mobilesync client
 * @param reason The reason to supply to the device for cancelling
 *
 * @retval MOBILESYNC_E_SUCCESS on success
 * @retval MOBILESYNC_E_INVALID_ARG if one of the parameters is invalid
 */
mobilesync_error_t mobilesync_cancel(mobilesync_client_t client, const char* reason)
{
	if (!client || !client->data_class || !reason) {
		return MOBILESYNC_E_INVALID_ARG;
	}

	mobilesync_error_t err = MOBILESYNC_E_UNKNOWN_ERROR;
	plist_t msg = NULL;

	msg = plist_new_array();
	plist_array_append_item(msg, plist_new_string("SDMessageCancelSession"));
	plist_array_append_item(msg, plist_new_string(client->data_class));
	plist_array_append_item(msg, plist_new_string(reason));

	err = mobilesync_send(client, msg);

	plist_free(msg);
	msg = NULL;

	free(client->data_class);
	client->data_class = NULL;
	client->direction = MOBILESYNC_SYNC_DIR_DEVICE_TO_COMPUTER;

	return err;
}

/**
 * Sends a notification to the device's notification_proxy.
 *
 * @param client The client to send to
 * @param notification The notification message to send
 *
 * @return NP_E_SUCCESS on success, or an error returned by np_plist_send
 */
np_error_t np_post_notification(np_client_t client, const char *notification)
{
	if (!client || !notification) {
		return NP_E_INVALID_ARG;
	}
	np_lock(client);

	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict,"Command", plist_new_string("PostNotification"));
	plist_dict_insert_item(dict,"Name", plist_new_string(notification));

	np_error_t res = np_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	dict = plist_new_dict();
	plist_dict_insert_item(dict,"Command", plist_new_string("Shutdown"));

	res = np_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	if (res != NP_E_SUCCESS) {
		debug_info("Error sending XML plist to device!");
	}

	np_unlock(client);
	return res;
}

plist_t tss_request_new(plist_t overrides) {

	plist_t request = plist_new_dict();

	plist_dict_set_item(request, "@Locality", plist_new_string("en_US"));
	plist_dict_set_item(request, "@HostPlatformInfo",
#ifdef WIN32
		plist_new_string("windows")
#else
		plist_new_string("mac")
#endif
	);

	plist_dict_set_item(request, "@VersionInfo", plist_new_string(TSS_CLIENT_VERSION_STRING));
	char* guid = generate_guid();
	if (guid) {
		plist_dict_set_item(request, "@UUID", plist_new_string(guid));
		free(guid);
	}

	/* apply overrides */
	if (overrides) {
		plist_dict_merge(&request, overrides);
	}

	return request;
}

dl_status dl_start(dl_t self) {
  // Assume usbmuxd supports proto_version 1.  If not then we'd need to
  // send a binary listen request, check for failure, then retry this:
  plist_t dict = plist_new_dict();
  plist_dict_insert_item(dict, "ClientVersionString", plist_new_string(
        "device_listener"));
  plist_dict_insert_item(dict, "MessageType", plist_new_string("Listen"));
  plist_dict_insert_item(dict, "ProgName", plist_new_string("libusbmuxd"));
  char *xml = NULL;
  uint32_t xml_length = 0;
  plist_to_xml(dict, &xml, &xml_length);
  plist_free(dict);

  size_t length = 16 + xml_length;
  char *packet = (char *)calloc(length, sizeof(char));
  if (!packet) {
    return DL_ERROR;
  }
  char *tail = packet;
  tail = dl_sprintf_uint32(tail, length);
  tail = dl_sprintf_uint32(tail, 1); // version: 1
  tail = dl_sprintf_uint32(tail, TYPE_PLIST); // type: plist
  tail = dl_sprintf_uint32(tail, 1); // tag: 1
  tail = stpncpy(tail, xml, xml_length);
  free(xml);

  dl_status ret = self->send_packet(self, packet, length);
  free(packet);
  return ret;
}

/**
 * Uninstall an application from the device.
 *
 * @param client The connected installation proxy client
 * @param appid ApplicationIdentifier of the app to uninstall
 * @param client_options The client options to use, as PLIST_DICT, or NULL.
 *        Currently there are no known client options, so pass NULL here.
 * @param status_cb Callback function for progress and status information. If
 *        NULL is passed, this function will run synchronously.
 * @param user_data Callback data passed to status_cb.
 *
 * @return INSTPROXY_E_SUCCESS on success or an INSTPROXY_E_* error value if
 *     an error occured.
 *
 * @note If a callback function is given (async mode), this function returns
 *     INSTPROXY_E_SUCCESS immediately if the status updater thread has been
 *     created successfully; any error occuring during the operation has to be
 *     handled inside the specified callback function.
 */
instproxy_error_t instproxy_uninstall(instproxy_client_t client, const char *appid, plist_t client_options, instproxy_status_cb_t status_cb, void *user_data)
{
	if (!client || !client->parent || !appid) {
		return INSTPROXY_E_INVALID_ARG;
	}

	if (client->status_updater) {
		return INSTPROXY_E_OP_IN_PROGRESS;
	}

	instproxy_error_t res = INSTPROXY_E_UNKNOWN_ERROR;
	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "ApplicationIdentifier", plist_new_string(appid));
	plist_dict_insert_item(dict, "Command", plist_new_string("Uninstall"));

	instproxy_lock(client);
	res = instproxy_send_command(client, "Uninstall", client_options, appid, NULL);
	instproxy_unlock(client);

	plist_free(dict);

	if (res != INSTPROXY_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		return res;
	}

	return instproxy_create_status_updater(client, status_cb, "Uninstall", user_data);
}

/**
 * Mounts an image on the device.
 *
 * @param client The connected mobile_image_mounter client.
 * @param image_path The absolute path of the image to mount. The image must
 *    be present before calling this function.
 * @param image_signature Pointer to a buffer holding the images' signature
 * @param signature_length Length of the signature image_signature points to
 * @param image_type Type of image to mount
 * @param result Pointer to a plist that will receive the result of the
 *    operation.
 *
 * @note This function may return MOBILE_IMAGE_MOUNTER_E_SUCCESS even if the
 *    operation has failed. Check the resulting plist for further information.
 *    Note that there is no unmounting function. The mount persists until the
 *    device is rebooted.
 *
 * @return MOBILE_IMAGE_MOUNTER_E_SUCCESS on success,
 *    MOBILE_IMAGE_MOUNTER_E_INVALID_ARG if on ore more parameters are
 *    invalid, or another error code otherwise.
 */
mobile_image_mounter_error_t mobile_image_mounter_mount_image(mobile_image_mounter_client_t client, const char *image_path, const char *image_signature, uint16_t signature_length, const char *image_type, plist_t *result)
{
	if (!client || !image_path || !image_signature || (signature_length == 0) || !image_type || !result) {
		return MOBILE_IMAGE_MOUNTER_E_INVALID_ARG;
	}
	mobile_image_mounter_lock(client);

	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "Command", plist_new_string("MountImage"));
	plist_dict_insert_item(dict, "ImagePath", plist_new_string(image_path));
	plist_dict_insert_item(dict, "ImageSignature", plist_new_data(image_signature, signature_length));
	plist_dict_insert_item(dict, "ImageType", plist_new_string(image_type));

	mobile_image_mounter_error_t res = mobile_image_mounter_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	if (res != MOBILE_IMAGE_MOUNTER_E_SUCCESS) {
		debug_info("%s: Error sending XML plist to device!", __func__);
		goto leave_unlock;
	}

	res = mobile_image_mounter_error(property_list_service_receive_plist(client->parent, result));
	if (res != MOBILE_IMAGE_MOUNTER_E_SUCCESS) {
		debug_info("%s: Error receiving response from device!", __func__);
	}

leave_unlock:
	mobile_image_mounter_unlock(client);
	return res;
}

/** Sends a notification to the device's Notification Proxy.
 *
 * notification messages seen so far:
 *   com.apple.itunes-mobdev.syncWillStart
 *   com.apple.itunes-mobdev.syncDidStart
 *
 * @param client The client to send to
 * @param notification The notification message to send
 */
np_error_t np_post_notification(np_client_t client, const char *notification)
{
	if (!client || !notification) {
		return NP_E_INVALID_ARG;
	}
	np_lock(client);

	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict,"Command", plist_new_string("PostNotification"));
	plist_dict_insert_item(dict,"Name", plist_new_string(notification));

	np_error_t res = np_plist_send(client, dict);
	plist_free(dict);

	dict = plist_new_dict();
	plist_dict_insert_item(dict,"Command", plist_new_string("Shutdown"));

	res = np_plist_send(client, dict);
	plist_free(dict);

	if (res != NP_E_SUCCESS) {
		log_debug_msg("%s: Error sending XML plist to device!\n", __func__);
	}

	np_unlock(client);
	return res;
}

LIBIMOBILEDEVICE_API mobilebackup2_error_t mobilebackup2_send_request(mobilebackup2_client_t client, const char *request, const char *target_identifier, const char *source_identifier, plist_t options)
{
	if (!client || !client->parent || !request || !target_identifier)
		return MOBILEBACKUP2_E_INVALID_ARG;

	plist_t dict = plist_new_dict();
	plist_dict_set_item(dict, "TargetIdentifier", plist_new_string(target_identifier));
	if (source_identifier) {
		plist_dict_set_item(dict, "SourceIdentifier", plist_new_string(source_identifier));
	}
	if (options) {
		plist_dict_set_item(dict, "Options", plist_copy(options));
	}
	if (!strcmp(request, "Unback") && options) {
		plist_t node = plist_dict_get_item(options, "Password");
		if (node) {
			plist_dict_set_item(dict, "Password", plist_copy(node));
		}
	}
	if (!strcmp(request, "EnableCloudBackup") && options) {
		plist_t node = plist_dict_get_item(options, "CloudBackupState");
		if (node) {
			plist_dict_set_item(dict, "CloudBackupState", plist_copy(node));
		}
	}
	mobilebackup2_error_t err = mobilebackup2_send_message(client, request, dict);
	plist_free(dict);

	return err;
}

/**
 * Request a backup from the connected device.
 *
 * @param client The connected MobileBackup client to use.
 * @param backup_manifest The backup manifest, a plist_t of type PLIST_DICT
 *    containing the backup state of the last backup. For a first-time backup
 *    set this parameter to NULL.
 * @param base_path The base path on the device to use for the backup
 *    operation, usually "/".
 * @param proto_version A string denoting the version of the backup protocol
 *    to use. Latest known version is "1.6"
 *
 * @return MOBILEBACKUP_E_SUCCESS on success, MOBILEBACKUP_E_INVALID_ARG if
 *    one of the parameters is invalid, MOBILEBACKUP_E_PLIST_ERROR if
 *    backup_manifest is not of type PLIST_DICT, MOBILEBACKUP_E_MUX_ERROR
 *    if a communication error occurs, MOBILEBACKUP_E_REPLY_NOT_OK
 */
mobilebackup_error_t mobilebackup_request_backup(mobilebackup_client_t client, plist_t backup_manifest, const char *base_path, const char *proto_version)
{
	if (!client || !client->parent || !base_path || !proto_version)
		return MOBILEBACKUP_E_INVALID_ARG;

	if (backup_manifest && (plist_get_node_type(backup_manifest) != PLIST_DICT))
		return MOBILEBACKUP_E_PLIST_ERROR;

	mobilebackup_error_t err;

	/* construct request plist */
	plist_t dict = plist_new_dict();
	if (backup_manifest)
		plist_dict_insert_item(dict, "BackupManifestKey", plist_copy(backup_manifest));
	plist_dict_insert_item(dict, "BackupComputerBasePathKey", plist_new_string(base_path));
	plist_dict_insert_item(dict, "BackupMessageTypeKey", plist_new_string("BackupMessageBackupRequest"));
	plist_dict_insert_item(dict, "BackupProtocolVersion", plist_new_string(proto_version));

	/* send request */
	err = mobilebackup_send_message(client, NULL, dict);
	plist_free(dict);
	dict = NULL;
	if (err != MOBILEBACKUP_E_SUCCESS) {
		debug_info("ERROR: Could not send backup request message (%d)!", err);
		goto leave;
	}

	/* now receive and hopefully get a BackupMessageBackupReplyOK */
	err = mobilebackup_receive_message(client, "BackupMessageBackupReplyOK", &dict);
	if (err != MOBILEBACKUP_E_SUCCESS) {
		debug_info("ERROR: Could not receive BackupReplyOK message (%d)!", err);
		goto leave;
	}

	plist_t node = plist_dict_get_item(dict, "BackupProtocolVersion");
	if (node) {
		char *str = NULL;
		plist_get_string_val(node, &str);
		if (str) {
			if (strcmp(str, proto_version) != 0) {
				err = MOBILEBACKUP_E_BAD_VERSION;
			}
			free(str);
		}
	}
	if (err != MOBILEBACKUP_E_SUCCESS)
		goto leave;

	/* BackupMessageBackupReplyOK received, send it back */
	err = mobilebackup_send_message(client, NULL, dict);
	if (err != MOBILEBACKUP_E_SUCCESS) {
		debug_info("ERROR: Could not send BackupReplyOK ACK (%d)", err);
	}

leave:
	if (dict)
		plist_free(dict);
	return err;
}

LIBIMOBILEDEVICE_API lockdownd_error_t lockdownd_get_value(lockdownd_client_t client, const char *domain, const char *key, plist_t *value)
{
	if (!client)
		return LOCKDOWN_E_INVALID_ARG;

	plist_t dict = NULL;
	lockdownd_error_t ret = LOCKDOWN_E_UNKNOWN_ERROR;

	/* setup request plist */
	dict = plist_new_dict();
	plist_dict_add_label(dict, client->label);
	if (domain) {
		plist_dict_set_item(dict,"Domain", plist_new_string(domain));
	}
	if (key) {
		plist_dict_set_item(dict,"Key", plist_new_string(key));
	}
	plist_dict_set_item(dict,"Request", plist_new_string("GetValue"));

	/* send to device */
	ret = lockdownd_send(client, dict);

	plist_free(dict);
	dict = NULL;

	if (ret != LOCKDOWN_E_SUCCESS)
		return ret;

	/* Now get device's answer */
	ret = lockdownd_receive(client, &dict);
	if (ret != LOCKDOWN_E_SUCCESS)
		return ret;

	if (lockdown_check_result(dict, "GetValue") == RESULT_SUCCESS) {
		debug_info("success");
		ret = LOCKDOWN_E_SUCCESS;
	} else {
		ret = LOCKDOWN_E_UNKNOWN_ERROR;
	}
	if (ret != LOCKDOWN_E_SUCCESS) {
		plist_free(dict);
		return ret;
	}

	plist_t value_node = plist_dict_get_item(dict, "Value");

	if (value_node) {
		debug_info("has a value");
		*value = plist_copy(value_node);
	}

	plist_free(dict);
	return ret;
}

/**
 * Request that a backup should be restored to the connected device.
 *
 * @param client The connected MobileBackup client to use.
 * @param backup_manifest The backup manifest, a plist_t of type PLIST_DICT
 *    containing the backup state to be restored.
 * @param flags Flags to send with the request. Currently this is a combination
 *    of the following mobilebackup_flags_t:
 *    MB_RESTORE_NOTIFY_SPRINGBOARD - let SpringBoard show a 'Restore' screen
 *    MB_RESTORE_PRESERVE_SETTINGS - do not overwrite any settings
 *    MB_RESTORE_PRESERVE_CAMERA_ROLL - preserve the photos of the camera roll
 * @param proto_version A string denoting the version of the backup protocol
 *    to use. Latest known version is "1.6". Ideally this value should be
 *    extracted from the given manifest plist.
 *
 * @return MOBILEBACKUP_E_SUCCESS on success, MOBILEBACKUP_E_INVALID_ARG if
 *    one of the parameters is invalid, MOBILEBACKUP_E_PLIST_ERROR if
 *    backup_manifest is not of type PLIST_DICT, MOBILEBACKUP_E_MUX_ERROR
 *    if a communication error occurs, or MOBILEBACKUP_E_REPLY_NOT_OK
 *    if the device did not accept the request.
 */
mobilebackup_error_t mobilebackup_request_restore(mobilebackup_client_t client, plist_t backup_manifest, mobilebackup_flags_t flags, const char *proto_version)
{
	if (!client || !client->parent || !backup_manifest || !proto_version)
		return MOBILEBACKUP_E_INVALID_ARG;

	if (backup_manifest && (plist_get_node_type(backup_manifest) != PLIST_DICT))
		return MOBILEBACKUP_E_PLIST_ERROR;

	mobilebackup_error_t err;

	/* construct request plist */
	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "BackupManifestKey", plist_copy(backup_manifest));
	plist_dict_insert_item(dict, "BackupMessageTypeKey", plist_new_string("kBackupMessageRestoreRequest"));
	plist_dict_insert_item(dict, "BackupProtocolVersion", plist_new_string(proto_version));
	/* add flags */
	plist_dict_insert_item(dict, "BackupNotifySpringBoard", plist_new_bool(IS_FLAG_SET(flags, MB_RESTORE_NOTIFY_SPRINGBOARD)));
	plist_dict_insert_item(dict, "BackupPreserveSettings", plist_new_bool(IS_FLAG_SET(flags, MB_RESTORE_PRESERVE_SETTINGS)));
	plist_dict_insert_item(dict, "BackupPreserveCameraRoll", plist_new_bool(IS_FLAG_SET(flags, MB_RESTORE_PRESERVE_CAMERA_ROLL)));

	/* send request */
	err = mobilebackup_send_message(client, NULL, dict);
	plist_free(dict);
	dict = NULL;
	if (err != MOBILEBACKUP_E_SUCCESS) {
		debug_info("ERROR: Could not send restore request message (%d)!", err);
		goto leave;
	}

	/* now receive and hopefully get a BackupMessageRestoreReplyOK */
	err = mobilebackup_receive_message(client, "BackupMessageRestoreReplyOK", &dict);
	if (err != MOBILEBACKUP_E_SUCCESS) {
		debug_info("ERROR: Could not receive RestoreReplyOK message (%d)!", err);
		goto leave;
	}

	plist_t node = plist_dict_get_item(dict, "BackupProtocolVersion");
	if (node) {
		char *str = NULL;
		plist_get_string_val(node, &str);
		if (str) {
			if (strcmp(str, proto_version) != 0) {
				err = MOBILEBACKUP_E_BAD_VERSION;
			}
			free(str);
		}
	}

leave:
	if (dict)
		plist_free(dict);
	return err;
}

LIBIMOBILEDEVICE_API lockdownd_error_t lockdownd_stop_session(lockdownd_client_t client, const char *session_id)
{
	if (!client)
		return LOCKDOWN_E_INVALID_ARG;

	if (!session_id) {
		debug_info("no session_id given, cannot stop session");
		return LOCKDOWN_E_INVALID_ARG;
	}

	lockdownd_error_t ret = LOCKDOWN_E_UNKNOWN_ERROR;

	plist_t dict = plist_new_dict();
	plist_dict_add_label(dict, client->label);
	plist_dict_set_item(dict,"Request", plist_new_string("StopSession"));
	plist_dict_set_item(dict,"SessionID", plist_new_string(session_id));

	debug_info("stopping session %s", session_id);

	ret = lockdownd_send(client, dict);

	plist_free(dict);
	dict = NULL;

	ret = lockdownd_receive(client, &dict);

	if (!dict) {
		debug_info("LOCKDOWN_E_PLIST_ERROR");
		return LOCKDOWN_E_PLIST_ERROR;
	}

	ret = LOCKDOWN_E_UNKNOWN_ERROR;
	if (lockdown_check_result(dict, "StopSession") == RESULT_SUCCESS) {
		debug_info("success");
		ret = LOCKDOWN_E_SUCCESS;
	}

	plist_free(dict);
	dict = NULL;

	if (client->session_id) {
		free(client->session_id);
		client->session_id = NULL;
	}

	if (client->ssl_enabled) {
		property_list_service_disable_ssl(client->parent);
		client->ssl_enabled = 0;
	}

	return ret;
}

static void mobilesync_disconnect(mobilesync_client_t client)
{
	if (!client)
		return;

	plist_t array = plist_new_array();
	plist_array_append_item(array, plist_new_string("DLMessageDisconnect"));
	plist_array_append_item(array, plist_new_string("All done, thanks for the memories"));

	mobilesync_send(client, array);
	plist_free(array);
	array = NULL;
}

/**
 * Sends a notification to the device's notification_proxy.
 *
 * @param client The client to send to
 * @param notification The notification message to send
 *
 * @return NP_E_SUCCESS on success, or an error returned by np_plist_send
 */
np_error_t np_post_notification(np_client_t client, const char *notification)
{
	if (!client || !notification) {
		return NP_E_INVALID_ARG;
	}
	np_lock(client);

	plist_t dict = plist_new_dict();
	plist_dict_set_item(dict,"Command", plist_new_string("PostNotification"));
	plist_dict_set_item(dict,"Name", plist_new_string(notification));

	np_error_t res = np_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	dict = plist_new_dict();
	plist_dict_set_item(dict,"Command", plist_new_string("Shutdown"));

	res = np_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	if (res != NP_E_SUCCESS) {
		debug_info("Error sending XML plist to device!");
	}

	// try to read an answer, we just ignore errors here
	dict = NULL;
	property_list_service_receive_plist(client->parent, &dict);
	if (dict) {
#ifndef STRIP_DEBUG_CODE
		char *cmd_value = NULL;
		plist_t cmd_value_node = plist_dict_get_item(dict, "Command");
		if (plist_get_node_type(cmd_value_node) == PLIST_STRING) {
			plist_get_string_val(cmd_value_node, &cmd_value);
		}

		if (cmd_value && !strcmp(cmd_value, "ProxyDeath")) {
			// this is the expected answer
		} else {
			debug_plist(dict);
		}
		if (cmd_value) {
			free(cmd_value);
		}
#endif
		plist_free(dict);
	}

	np_unlock(client);
	return res;
}

static plist_t create_device_attached_plist(struct device_info *dev)
{
    plist_t dict = plist_new_dict();
    plist_dict_set_item(dict, "MessageType", plist_new_string("Attached"));
    plist_dict_set_item(dict, "DeviceID", plist_new_uint(dev->id));
    plist_t props = plist_new_dict();
    plist_dict_set_item(props, "ConnectionSpeed", plist_new_uint(dev->speed));
    plist_dict_set_item(props, "ConnectionType", plist_new_string("USB"));
    plist_dict_set_item(props, "DeviceID", plist_new_uint(dev->id));
    plist_dict_set_item(props, "LocationID", plist_new_uint(dev->location));
    plist_dict_set_item(props, "ProductID", plist_new_uint(dev->pid));
    plist_dict_set_item(props, "SerialNumber", plist_new_string(dev->serial));
    plist_dict_set_item(dict, "Properties", props);
    return dict;
}

/**
 * Returns a new plist from the supplied lockdownd pair record. The caller is
 * responsible for freeing the plist.
 *
 * @param pair_record The pair record to create a plist from.
 *
 * @return A pair record plist from the device, NULL if pair_record is not set
 */
static plist_t lockdownd_pair_record_to_plist(lockdownd_pair_record_t pair_record)
{
	if (!pair_record)
		return NULL;

	/* setup request plist */
	plist_t dict = plist_new_dict();
	plist_dict_set_item(dict, "DeviceCertificate", plist_new_data(pair_record->device_certificate, strlen(pair_record->device_certificate)));
	plist_dict_set_item(dict, "HostCertificate", plist_new_data(pair_record->host_certificate, strlen(pair_record->host_certificate)));
	plist_dict_set_item(dict, "HostID", plist_new_string(pair_record->host_id));
	plist_dict_set_item(dict, "RootCertificate", plist_new_data(pair_record->root_certificate, strlen(pair_record->root_certificate)));
	plist_dict_set_item(dict, "SystemBUID", plist_new_string(pair_record->system_buid));

	return dict;
}

static plist_t create_process_changes_message(const char *data_class, plist_t entities, uint8_t more_changes, plist_t actions)
{
	plist_t msg = plist_new_array();
	plist_array_append_item(msg, plist_new_string("SDMessageProcessChanges"));
	plist_array_append_item(msg, plist_new_string(data_class));
	plist_array_append_item(msg, plist_copy(entities));
	plist_array_append_item(msg, plist_new_bool(more_changes));

	if (actions)
		plist_array_append_item(msg, plist_copy(actions));
	else
		plist_array_append_item(msg, plist_new_string(EMPTY_PARAMETER_STRING));

	return msg;
}

/**
 * Puts the device into deep sleep mode and disconnects from host.
 *
 * @param client The diagnostics_relay client
 *
 * @return DIAGNOSTICS_RELAY_E_SUCCESS on success,
 *  DIAGNOSTICS_RELAY_E_INVALID_ARG when client is NULL,
 *  DIAGNOSTICS_RELAY_E_PLIST_ERROR if the device did not acknowledge the
 *  request
 */
diagnostics_relay_error_t diagnostics_relay_sleep(diagnostics_relay_client_t client)
{
	if (!client)
		return DIAGNOSTICS_RELAY_E_INVALID_ARG;

	diagnostics_relay_error_t ret = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;

	plist_t dict = plist_new_dict();

	plist_dict_insert_item(dict,"Request", plist_new_string("Sleep"));
	ret = diagnostics_relay_send(client, dict);
	plist_free(dict);
	dict = NULL;

	ret = diagnostics_relay_receive(client, &dict);
	if (!dict) {
		return DIAGNOSTICS_RELAY_E_PLIST_ERROR;
	}

	int check = diagnostics_relay_check_result(dict);
	if (check == RESULT_SUCCESS) {
		ret = DIAGNOSTICS_RELAY_E_SUCCESS;
	} else if (check == RESULT_UNKNOWN_REQUEST) {
		ret = DIAGNOSTICS_RELAY_E_UNKNOWN_REQUEST;
	} else {
		ret = DIAGNOSTICS_RELAY_E_UNKNOWN_ERROR;
	}

	plist_free(dict);
	return ret;
}

/**
 * Hangs up the connection to the mobile_image_mounter service.
 * This functions has to be called before freeing up a mobile_image_mounter
 * instance. If not, errors appear in the device's syslog.
 *
 * @param client The client to hang up
 *
 * @return MOBILE_IMAGE_MOUNTER_E_SUCCESS on success,
 *     MOBILE_IMAGE_MOUNTER_E_INVALID_ARG if client is invalid,
 *     or another error code otherwise.
 */
mobile_image_mounter_error_t mobile_image_mounter_hangup(mobile_image_mounter_client_t client)
{
	if (!client) {
		return MOBILE_IMAGE_MOUNTER_E_INVALID_ARG;
	}
	mobile_image_mounter_lock(client);

	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "Command", plist_new_string("Hangup"));

	mobile_image_mounter_error_t res = mobile_image_mounter_error(property_list_service_send_xml_plist(client->parent, dict));
	plist_free(dict);

	if (res != MOBILE_IMAGE_MOUNTER_E_SUCCESS) {
		debug_info("%s: Error sending XML plist to device!", __func__);
		goto leave_unlock;
	}

	dict = NULL;
	res = mobile_image_mounter_error(property_list_service_receive_plist(client->parent, &dict));
	if (res != MOBILE_IMAGE_MOUNTER_E_SUCCESS) {
		debug_info("%s: Error receiving response from device!", __func__);
	}
	if (dict) {
		debug_plist(dict);
		plist_free(dict);
	}

leave_unlock:
	mobile_image_mounter_unlock(client);
	return res;
}

/**
 * Get the home screen wallpaper as PNG data.
 *
 * @param client The connected sbservices client to use.
 * @param pngdata Pointer that will point to a newly allocated buffer
 *     containing the PNG data upon successful return. It is up to the caller
 *     to free the memory.
 * @param pngsize Pointer to a uint64_t that will be set to the size of the
 *     buffer pngdata points to upon successful return.
 *
 * @return SBSERVICES_E_SUCCESS on success, SBSERVICES_E_INVALID_ARG when
 *     client or pngdata are invalid, or an SBSERVICES_E_* error
 *     code otherwise.
 */
sbservices_error_t sbservices_get_home_screen_wallpaper_pngdata(sbservices_client_t client, char **pngdata, uint64_t *pngsize)
{
	if (!client || !client->parent || !pngdata)
		return SBSERVICES_E_INVALID_ARG;

	sbservices_error_t res = SBSERVICES_E_UNKNOWN_ERROR;

	plist_t dict = plist_new_dict();
	plist_dict_insert_item(dict, "command", plist_new_string("getHomeScreenWallpaperPNGData"));

	sbs_lock(client);

	res = sbservices_error(property_list_service_send_binary_plist(client->parent, dict));
	if (res != SBSERVICES_E_SUCCESS) {
		debug_info("could not send plist, error %d", res);
		goto leave_unlock;
	}
	plist_free(dict);

	dict = NULL;
	res = sbservices_error(property_list_service_receive_plist(client->parent, &dict));
	if (res	== SBSERVICES_E_SUCCESS) {
		plist_t node = plist_dict_get_item(dict, "pngData");
		if (node) {
			plist_get_data_val(node, pngdata, pngsize);
		}
	}

leave_unlock:
	if (dict) {
		plist_free(dict);
	}
	sbs_unlock(client);
	return res;
}