/*
* WPA Supplicant / dbus-based control interface
* Copyright (c) 2006, Dan Williams <dcbw@redhat.com> and Red Hat, Inc.
* Copyright (c) 2009, Witold Sowa <witold.sowa@gmail.com>
*
* This software may be distributed under the terms of the BSD license.
* See README for more details.
*/
#include "utils/includes.h"
#include "utils/common.h"
#include "utils/eloop.h"
#include "dbus_common.h"
#include "dbus_common_i.h"
#include "dbus_new.h"
#include "dbus_new_helpers.h"
#include "dbus_new_handlers.h"
#include "dbus_dict_helpers.h"
static dbus_bool_t fill_dict_with_properties(
DBusMessageIter *dict_iter,
const struct wpa_dbus_property_desc *props,
const char *interface, void *user_data, DBusError *error)
{
DBusMessageIter entry_iter;
const struct wpa_dbus_property_desc *dsc;
for (dsc = props; dsc && dsc->dbus_property; dsc++) {
/* Only return properties for the requested D-Bus interface */
if (os_strncmp(dsc->dbus_interface, interface,
WPAS_DBUS_INTERFACE_MAX) != 0)
continue;
/* Skip write-only properties */
if (dsc->getter == NULL)
continue;
if (!dbus_message_iter_open_container(dict_iter,
DBUS_TYPE_DICT_ENTRY,
NULL, &entry_iter) ||
!dbus_message_iter_append_basic(&entry_iter,
DBUS_TYPE_STRING,
&dsc->dbus_property))
goto error;
/* An error getting a property fails the request entirely */
if (!dsc->getter(&entry_iter, error, user_data)) {
wpa_printf(MSG_INFO,
"dbus: %s dbus_interface=%s dbus_property=%s getter failed",
__func__, dsc->dbus_interface,
dsc->dbus_property);
return FALSE;
}
if (!dbus_message_iter_close_container(dict_iter, &entry_iter))
goto error;
}
return TRUE;
error:
dbus_set_error_const(error, DBUS_ERROR_NO_MEMORY, "no memory");
return FALSE;
}
/**
* get_all_properties - Responds for GetAll properties calls on object
* @message: Message with GetAll call
* @interface: interface name which properties will be returned
* @property_dsc: list of object's properties
* Returns: Message with dict of variants as argument with properties values
*
* Iterates over all properties registered with object and execute getters
* of those, which are readable and which interface matches interface
* specified as argument. Returned message contains one dict argument
* with properties names as keys and theirs values as values.
*/
static DBusMessage * get_all_properties(DBusMessage *message, char *interface,
struct wpa_dbus_object_desc *obj_dsc)
{
DBusMessage *reply;
DBusMessageIter iter, dict_iter;
DBusError error;
reply = dbus_message_new_method_return(message);
if (reply == NULL)
return wpas_dbus_error_no_memory(message);
dbus_message_iter_init_append(reply, &iter);
if (!wpa_dbus_dict_open_write(&iter, &dict_iter)) {
dbus_message_unref(reply);
return wpas_dbus_error_no_memory(message);
}
dbus_error_init(&error);
if (!fill_dict_with_properties(&dict_iter, obj_dsc->properties,
interface, obj_dsc->user_data, &error)) {
dbus_message_unref(reply);
reply = wpas_dbus_reply_new_from_error(
message, &error, DBUS_ERROR_INVALID_ARGS,
"No readable properties in this interface");
dbus_error_free(&error);
return reply;
}
if (!wpa_dbus_dict_close_write(&iter, &dict_iter)) {
dbus_message_unref(reply);
return wpas_dbus_error_no_memory(message);
}
return reply;
}
static int is_signature_correct(DBusMessage *message,
const struct wpa_dbus_method_desc *method_dsc)
{
/* According to DBus documentation max length of signature is 255 */
#define MAX_SIG_LEN 256
char registered_sig[MAX_SIG_LEN], *pos;
const char *sig = dbus_message_get_signature(message);
int ret;
const struct wpa_dbus_argument *arg;
pos = registered_sig;
*pos = '\0';
for (arg = method_dsc->args; arg && arg->name; arg++) {
if (arg->dir == ARG_IN) {
size_t blen = registered_sig + MAX_SIG_LEN - pos;
ret = os_snprintf(pos, blen, "%s", arg->type);
if (os_snprintf_error(blen, ret))
return 0;
pos += ret;
}
}
return !os_strncmp(registered_sig, sig, MAX_SIG_LEN);
}
static DBusMessage * properties_get_all(DBusMessage *message, char *interface,
struct wpa_dbus_object_desc *obj_dsc)
{
if (os_strcmp(dbus_message_get_signature(message), "s") != 0)
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
NULL);
return get_all_properties(message, interface, obj_dsc);
}
static DBusMessage * properties_get(DBusMessage *message,
const struct wpa_dbus_property_desc *dsc,
void *user_data)
{
DBusMessage *reply;
DBusMessageIter iter;
DBusError error;
if (os_strcmp(dbus_message_get_signature(message), "ss")) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
NULL);
}
if (dsc->getter == NULL) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
"Property is write-only");
}
reply = dbus_message_new_method_return(message);
dbus_message_iter_init_append(reply, &iter);
dbus_error_init(&error);
if (dsc->getter(&iter, &error, user_data) == FALSE) {
dbus_message_unref(reply);
reply = wpas_dbus_reply_new_from_error(
message, &error, DBUS_ERROR_FAILED,
"Failed to read property");
dbus_error_free(&error);
}
return reply;
}
static DBusMessage * properties_set(DBusMessage *message,
const struct wpa_dbus_property_desc *dsc,
void *user_data)
{
DBusMessage *reply;
DBusMessageIter iter;
DBusError error;
if (os_strcmp(dbus_message_get_signature(message), "ssv")) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
NULL);
}
if (dsc->setter == NULL) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
"Property is read-only");
}
dbus_message_iter_init(message, &iter);
/* Skip the interface name and the property name */
dbus_message_iter_next(&iter);
dbus_message_iter_next(&iter);
/* Iter will now point to the property's new value */
dbus_error_init(&error);
if (dsc->setter(&iter, &error, user_data) == TRUE) {
/* Success */
reply = dbus_message_new_method_return(message);
} else {
reply = wpas_dbus_reply_new_from_error(
message, &error, DBUS_ERROR_FAILED,
"Failed to set property");
dbus_error_free(&error);
}
return reply;
}
static DBusMessage *
properties_get_or_set(DBusMessage *message, DBusMessageIter *iter,
char *interface,
struct wpa_dbus_object_desc *obj_dsc)
{
const struct wpa_dbus_property_desc *property_dsc;
char *property;
const char *method;
method = dbus_message_get_member(message);
property_dsc = obj_dsc->properties;
/* Second argument: property name (DBUS_TYPE_STRING) */
if (!dbus_message_iter_next(iter) ||
dbus_message_iter_get_arg_type(iter) != DBUS_TYPE_STRING) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
NULL);
}
dbus_message_iter_get_basic(iter, &property);
while (property_dsc && property_dsc->dbus_property) {
/* compare property names and
* interfaces */
if (!os_strncmp(property_dsc->dbus_property, property,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) &&
!os_strncmp(property_dsc->dbus_interface, interface,
WPAS_DBUS_INTERFACE_MAX))
break;
property_dsc++;
}
if (property_dsc == NULL || property_dsc->dbus_property == NULL) {
wpa_printf(MSG_DEBUG, "no property handler for %s.%s on %s",
interface, property,
dbus_message_get_path(message));
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
"No such property");
}
if (os_strncmp(WPA_DBUS_PROPERTIES_GET, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) == 0) {
wpa_printf(MSG_MSGDUMP, "%s: Get(%s)", __func__, property);
return properties_get(message, property_dsc,
obj_dsc->user_data);
}
wpa_printf(MSG_MSGDUMP, "%s: Set(%s)", __func__, property);
return properties_set(message, property_dsc, obj_dsc->user_data);
}
static DBusMessage * properties_handler(DBusMessage *message,
struct wpa_dbus_object_desc *obj_dsc)
{
DBusMessageIter iter;
char *interface;
const char *method;
method = dbus_message_get_member(message);
dbus_message_iter_init(message, &iter);
if (!os_strncmp(WPA_DBUS_PROPERTIES_GET, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) ||
!os_strncmp(WPA_DBUS_PROPERTIES_SET, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) ||
!os_strncmp(WPA_DBUS_PROPERTIES_GETALL, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX)) {
/* First argument: interface name (DBUS_TYPE_STRING) */
if (dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_STRING) {
return dbus_message_new_error(message,
DBUS_ERROR_INVALID_ARGS,
NULL);
}
dbus_message_iter_get_basic(&iter, &interface);
if (!os_strncmp(WPA_DBUS_PROPERTIES_GETALL, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX)) {
/* GetAll */
return properties_get_all(message, interface, obj_dsc);
}
/* Get or Set */
return properties_get_or_set(message, &iter, interface,
obj_dsc);
}
return dbus_message_new_error(message, DBUS_ERROR_UNKNOWN_METHOD,
NULL);
}
static DBusMessage * msg_method_handler(DBusMessage *message,
struct wpa_dbus_object_desc *obj_dsc)
{
const struct wpa_dbus_method_desc *method_dsc = obj_dsc->methods;
const char *method;
const char *msg_interface;
method = dbus_message_get_member(message);
msg_interface = dbus_message_get_interface(message);
/* try match call to any registered method */
while (method_dsc && method_dsc->dbus_method) {
/* compare method names and interfaces */
if (!os_strncmp(method_dsc->dbus_method, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) &&
!os_strncmp(method_dsc->dbus_interface, msg_interface,
WPAS_DBUS_INTERFACE_MAX))
break;
method_dsc++;
}
if (method_dsc == NULL || method_dsc->dbus_method == NULL) {
wpa_printf(MSG_DEBUG, "no method handler for %s.%s on %s",
msg_interface, method,
dbus_message_get_path(message));
return dbus_message_new_error(message,
DBUS_ERROR_UNKNOWN_METHOD, NULL);
}
if (!is_signature_correct(message, method_dsc)) {
return dbus_message_new_error(message, DBUS_ERROR_INVALID_ARGS,
NULL);
}
return method_dsc->method_handler(message, obj_dsc->user_data);
}
/**
* message_handler - Handles incoming DBus messages
* @connection: DBus connection on which message was received
* @message: Received message
* @user_data: pointer to description of object to which message was sent
* Returns: Returns information whether message was handled or not
*
* Reads message interface and method name, then checks if they matches one
* of the special cases i.e. introspection call or properties get/getall/set
* methods and handles it. Else it iterates over registered methods list
* and tries to match method's name and interface to those read from message
* If appropriate method was found its handler function is called and
* response is sent. Otherwise, the DBUS_ERROR_UNKNOWN_METHOD error message
* will be sent.
*/
static DBusHandlerResult message_handler(DBusConnection *connection,
DBusMessage *message, void *user_data)
{
struct wpa_dbus_object_desc *obj_dsc = user_data;
const char *method;
const char *path;
const char *msg_interface;
DBusMessage *reply;
/* get method, interface and path the message is addressed to */
method = dbus_message_get_member(message);
path = dbus_message_get_path(message);
msg_interface = dbus_message_get_interface(message);
if (!method || !path || !msg_interface)
return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
wpa_printf(MSG_MSGDUMP, "dbus: %s.%s (%s) [%s]",
msg_interface, method, path,
dbus_message_get_signature(message));
/* if message is introspection method call */
if (!os_strncmp(WPA_DBUS_INTROSPECTION_METHOD, method,
WPAS_DBUS_METHOD_SIGNAL_PROP_MAX) &&
!os_strncmp(WPA_DBUS_INTROSPECTION_INTERFACE, msg_interface,
WPAS_DBUS_INTERFACE_MAX)) {
#ifdef CONFIG_CTRL_IFACE_DBUS_INTRO
reply = wpa_dbus_introspect(message, obj_dsc);
#else /* CONFIG_CTRL_IFACE_DBUS_INTRO */
reply = dbus_message_new_error(
message, DBUS_ERROR_UNKNOWN_METHOD,
"wpa_supplicant was compiled without introspection support.");
#endif /* CONFIG_CTRL_IFACE_DBUS_INTRO */
} else if (!os_strncmp(WPA_DBUS_PROPERTIES_INTERFACE, msg_interface,
WPAS_DBUS_INTERFACE_MAX)) {
/* if message is properties method call */
reply = properties_handler(message, obj_dsc);
} else {
reply = msg_method_handler(message, obj_dsc);
}
/* If handler succeed returning NULL, reply empty message */
if (!reply)
reply = dbus_message_new_method_return(message);
if (reply) {
if (!dbus_message_get_no_reply(message))
dbus_connection_send(connection, reply, NULL);
dbus_message_unref(reply);
}
wpa_dbus_flush_all_changed_properties(connection);
return DBUS_HANDLER_RESULT_HANDLED;
}
/**
* free_dbus_object_desc - Frees object description data structure
* @connection: DBus connection
* @obj_dsc: Object description to free
*
* Frees each of properties, methods and signals description lists and
* the object description structure itself.
*/
void free_dbus_object_desc(struct wpa_dbus_object_desc *obj_dsc)
{
if (!obj_dsc)
return;
/* free handler's argument */
if (obj_dsc->user_data_free_func)
obj_dsc->user_data_free_func(obj_dsc->user_data);
os_free(obj_dsc->path);
os_free(obj_dsc->prop_changed_flags);
os_free(obj_dsc);
}
static void free_dbus_object_desc_cb(DBusConnection *connection, void *obj_dsc)
{
free_dbus_object_desc(obj_dsc);
}
/**
* wpa_dbus_ctrl_iface_init - Initialize dbus control interface
* @application_data: Pointer to application specific data structure
* @dbus_path: DBus path to interface object
* @dbus_service: DBus service name to register with
* @messageHandler: a pointer to function which will handle dbus messages
* coming on interface
* Returns: 0 on success, -1 on failure
*
* Initialize the dbus control interface and start receiving commands from
* external programs over the bus.
*/
int wpa_dbus_ctrl_iface_init(struct wpas_dbus_priv *iface,
char *dbus_path, char *dbus_service,
struct wpa_dbus_object_desc *obj_desc)
{
DBusError error;
int ret = -1;
DBusObjectPathVTable wpa_vtable = {
&free_dbus_object_desc_cb, &message_handler,
NULL, NULL, NULL, NULL
};
obj_desc->connection = iface->con;
obj_desc->path = os_strdup(dbus_path);
/* Register the message handler for the global dbus interface */
if (!dbus_connection_register_object_path(iface->con, dbus_path,
&wpa_vtable, obj_desc)) {
wpa_printf(MSG_ERROR, "dbus: Could not set up message handler");
return -1;
}
/* Register our service with the message bus */
dbus_error_init(&error);
switch (dbus_bus_request_name(iface->con, dbus_service, 0, &error)) {
case DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER:
ret = 0;
break;
case DBUS_REQUEST_NAME_REPLY_EXISTS:
case DBUS_REQUEST_NAME_REPLY_IN_QUEUE:
case DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER:
wpa_printf(MSG_ERROR,
"dbus: Could not request service name: already registered");
break;
default:
wpa_printf(MSG_ERROR,
"dbus: Could not request service name: %s %s",
error.name, error.message);
break;
}
dbus_error_free(&error);
if (ret != 0)
return -1;
wpa_printf(MSG_DEBUG, "Providing DBus service '%s'.", dbus_service);
return 0;
}
/**
* wpa_dbus_register_object_per_iface - Register a new object with dbus
* @ctrl_iface: pointer to dbus private data
* @path: DBus path to object
* @ifname: interface name
* @obj_desc: description of object's methods, signals and properties
* Returns: 0 on success, -1 on error
*
* Registers a new interface with dbus and assigns it a dbus object path.
*/
int wpa_dbus_register_object_per_iface(struct wpas_dbus_priv *ctrl_iface,
const char *path, const char *ifname,
struct wpa_dbus_object_desc *obj_desc)
{
DBusConnection *con;
DBusError error;
DBusObjectPathVTable vtable = {
&free_dbus_object_desc_cb, &message_handler,
NULL, NULL, NULL, NULL
};
/* Do nothing if the control interface is not turned on */
if (ctrl_iface == NULL)
return 0;
con = ctrl_iface->con;
obj_desc->connection = con;
obj_desc->path = os_strdup(path);
dbus_error_init(&error);
/* Register the message handler for the interface functions */
if (!dbus_connection_try_register_object_path(con, path, &vtable,
obj_desc, &error)) {
if (os_strcmp(error.name, DBUS_ERROR_OBJECT_PATH_IN_USE) == 0) {
wpa_printf(MSG_DEBUG, "dbus: %s", error.message);
} else {
wpa_printf(MSG_ERROR,
"dbus: Could not set up message handler for interface %s object %s (error: %s message: %s)",
ifname, path, error.name, error.message);
}
dbus_error_free(&error);
return -1;
}
dbus_error_free(&error);
return 0;
}
static void flush_object_timeout_handler(void *eloop_ctx, void *timeout_ctx);
/**
* wpa_dbus_unregister_object_per_iface - Unregisters DBus object
* @ctrl_iface: Pointer to dbus private data
* @path: DBus path to object which will be unregistered
* Returns: Zero on success and -1 on failure
*
* Unregisters DBus object given by its path
*/
int wpa_dbus_unregister_object_per_iface(
struct wpas_dbus_priv *ctrl_iface, const char *path)
{
DBusConnection *con = ctrl_iface->con;
struct wpa_dbus_object_desc *obj_desc = NULL;
dbus_connection_get_object_path_data(con, path, (void **) &obj_desc);
if (!obj_desc) {
wpa_printf(MSG_ERROR,
"dbus: %s: Could not obtain object's private data: %s",
__func__, path);
return 0;
}
eloop_cancel_timeout(flush_object_timeout_handler, con, obj_desc);
if (!dbus_connection_unregister_object_path(con, path))
return -1;
return 0;
}
static dbus_bool_t put_changed_properties(
const struct wpa_dbus_object_desc *obj_dsc, const char *interface,
DBusMessageIter *dict_iter, int clear_changed)
{
DBusMessageIter entry_iter;
const struct wpa_dbus_property_desc *dsc;
int i;
DBusError error;
for (dsc = obj_dsc->properties, i = 0; dsc && dsc->dbus_property;
dsc++, i++) {
if (obj_dsc->prop_changed_flags == NULL ||
!obj_dsc->prop_changed_flags[i])
continue;
if (os_strcmp(dsc->dbus_interface, interface) != 0)
continue;
if (clear_changed)
obj_dsc->prop_changed_flags[i] = 0;
if (!dbus_message_iter_open_container(dict_iter,
DBUS_TYPE_DICT_ENTRY,
NULL, &entry_iter) ||
!dbus_message_iter_append_basic(&entry_iter,
DBUS_TYPE_STRING,
&dsc->dbus_property))
return FALSE;
dbus_error_init(&error);
if (!dsc->getter(&entry_iter, &error, obj_dsc->user_data)) {
if (dbus_error_is_set(&error)) {
wpa_printf(MSG_ERROR,
"dbus: %s: Cannot get new value of property %s: (%s) %s",
__func__, dsc->dbus_property,
error.name, error.message);
} else {
wpa_printf(MSG_ERROR,
"dbus: %s: Cannot get new value of property %s",
__func__, dsc->dbus_property);
}
dbus_error_free(&error);
return FALSE;
}
if (!dbus_message_iter_close_container(dict_iter, &entry_iter))
return FALSE;
}
return TRUE;
}
static void do_send_prop_changed_signal(
DBusConnection *con, const char *path, const char *interface,
const struct wpa_dbus_object_desc *obj_dsc)
{
DBusMessage *msg;
DBusMessageIter signal_iter, dict_iter;
msg = dbus_message_new_signal(path, DBUS_INTERFACE_PROPERTIES,
"PropertiesChanged");
if (msg == NULL)
return;
dbus_message_iter_init_append(msg, &signal_iter);
if (!dbus_message_iter_append_basic(&signal_iter, DBUS_TYPE_STRING,
&interface) ||
/* Changed properties dict */
!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
"{sv}", &dict_iter) ||
!put_changed_properties(obj_dsc, interface, &dict_iter, 0) ||
!dbus_message_iter_close_container(&signal_iter, &dict_iter) ||
/* Invalidated properties array (empty) */
!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
"s", &dict_iter) ||
!dbus_message_iter_close_container(&signal_iter, &dict_iter)) {
wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
__func__);
} else {
dbus_connection_send(con, msg, NULL);
}
dbus_message_unref(msg);
}
static void do_send_deprecated_prop_changed_signal(
DBusConnection *con, const char *path, const char *interface,
const struct wpa_dbus_object_desc *obj_dsc)
{
DBusMessage *msg;
DBusMessageIter signal_iter, dict_iter;
msg = dbus_message_new_signal(path, interface, "PropertiesChanged");
if (msg == NULL)
return;
dbus_message_iter_init_append(msg, &signal_iter);
if (!dbus_message_iter_open_container(&signal_iter, DBUS_TYPE_ARRAY,
"{sv}", &dict_iter) ||
!put_changed_properties(obj_dsc, interface, &dict_iter, 1) ||
!dbus_message_iter_close_container(&signal_iter, &dict_iter)) {
wpa_printf(MSG_DEBUG, "dbus: %s: Failed to construct signal",
__func__);
} else {
dbus_connection_send(con, msg, NULL);
}
dbus_message_unref(msg);
}
static void send_prop_changed_signal(
DBusConnection *con, const char *path, const char *interface,
const struct wpa_dbus_object_desc *obj_dsc)
{
/*
* First, send property change notification on the standardized
* org.freedesktop.DBus.Properties interface. This call will not
* clear the property change bits, so that they are preserved for
* the call that follows.
*/
do_send_prop_changed_signal(con, path, interface, obj_dsc);
/*
* Now send PropertiesChanged on our own interface for backwards
* compatibility. This is deprecated and will be removed in a future
* release.
*/
do_send_deprecated_prop_changed_signal(con, path, interface, obj_dsc);
/* Property change bits have now been cleared. */
}
static void flush_object_timeout_handler(void *eloop_ctx, void *timeout_ctx)
{
DBusConnection *con = eloop_ctx;
struct wpa_dbus_object_desc *obj_desc = timeout_ctx;
wpa_printf(MSG_DEBUG,
"dbus: %s: Timeout - sending changed properties of object %s",
__func__, obj_desc->path);
wpa_dbus_flush_object_changed_properties(con, obj_desc->path);
}
static void recursive_flush_changed_properties(DBusConnection *con,
const char *path)
{
char **objects = NULL;
char subobj_path[WPAS_DBUS_OBJECT_PATH_MAX];
int i;
wpa_dbus_flush_object_changed_properties(con, path);
if (!dbus_connection_list_registered(con, path, &objects))
goto out;
for (i = 0; objects[i]; i++) {
os_snprintf(subobj_path, WPAS_DBUS_OBJECT_PATH_MAX,
"%s/%s", path, objects[i]);
recursive_flush_changed_properties(con, subobj_path);
}
out:
dbus_free_string_array(objects);
}
/**
* wpa_dbus_flush_all_changed_properties - Send all PropertiesChanged signals
* @con: DBus connection
*
* Traverses through all registered objects and sends PropertiesChanged for
* each properties.
*/
void wpa_dbus_flush_all_changed_properties(DBusConnection *con)
{
recursive_flush_changed_properties(con, WPAS_DBUS_NEW_PATH);
}
/**
* wpa_dbus_flush_object_changed_properties - Send PropertiesChanged for object
* @con: DBus connection
* @path: path to a DBus object for which PropertiesChanged will be sent.
*
* Iterates over all properties registered with object and for each interface
* containing properties marked as changed, sends a PropertiesChanged signal
* containing names and new values of properties that have changed.
*
* You need to call this function after wpa_dbus_mark_property_changed()
* if you want to send PropertiesChanged signal immediately (i.e., without
* waiting timeout to expire). PropertiesChanged signal for an object is sent
* automatically short time after first marking property as changed. All
* PropertiesChanged signals are sent automatically after responding on DBus
* message, so if you marked a property changed as a result of DBus call
* (e.g., param setter), you usually do not need to call this function.
*/
void wpa_dbus_flush_object_changed_properties(DBusConnection *con,
const char *path)
{
struct wpa_dbus_object_desc *obj_desc = NULL;
const struct wpa_dbus_property_desc *dsc;
int i;
dbus_connection_get_object_path_data(con, path, (void **) &obj_desc);
if (!obj_desc)
return;
eloop_cancel_timeout(flush_object_timeout_handler, con, obj_desc);
for (dsc = obj_desc->properties, i = 0; dsc && dsc->dbus_property;
dsc++, i++) {
if (obj_desc->prop_changed_flags == NULL ||
!obj_desc->prop_changed_flags[i])
continue;
send_prop_changed_signal(con, path, dsc->dbus_interface,
obj_desc);
}
}
#define WPA_DBUS_SEND_PROP_CHANGED_TIMEOUT 5000
/**
* wpa_dbus_mark_property_changed - Mark a property as changed and
* @iface: dbus priv struct
* @path: path to DBus object which property has changed
* @interface: interface containing changed property
* @property: property name which has changed
*
* Iterates over all properties registered with an object and marks the one
* given in parameters as changed. All parameters registered for an object
* within a single interface will be aggregated together and sent in one
* PropertiesChanged signal when function
* wpa_dbus_flush_object_changed_properties() is called.
*/
void wpa_dbus_mark_property_changed(struct wpas_dbus_priv *iface,
const char *path, const char *interface,
const char *property)
{
struct wpa_dbus_object_desc *obj_desc = NULL;
const struct wpa_dbus_property_desc *dsc;
int i = 0;
if (iface == NULL)
return;
dbus_connection_get_object_path_data(iface->con, path,
(void **) &obj_desc);
if (!obj_desc) {
wpa_printf(MSG_ERROR,
"dbus: wpa_dbus_property_changed: could not obtain object's private data: %s",
path);
return;
}
for (dsc = obj_desc->properties; dsc && dsc->dbus_property; dsc++, i++)
if (os_strcmp(property, dsc->dbus_property) == 0 &&
os_strcmp(interface, dsc->dbus_interface) == 0) {
if (obj_desc->prop_changed_flags)
obj_desc->prop_changed_flags[i] = 1;
break;
}
if (!dsc || !dsc->dbus_property) {
wpa_printf(MSG_ERROR,
"dbus: wpa_dbus_property_changed: no property %s in object %s",
property, path);
return;
}
if (!eloop_is_timeout_registered(flush_object_timeout_handler,
iface->con, obj_desc)) {
eloop_register_timeout(0, WPA_DBUS_SEND_PROP_CHANGED_TIMEOUT,
flush_object_timeout_handler,
iface->con, obj_desc);
}
}
/**
* wpa_dbus_get_object_properties - Put object's properties into dictionary
* @iface: dbus priv struct
* @path: path to DBus object which properties will be obtained
* @interface: interface name which properties will be obtained
* @iter: DBus message iter at which to append property dictionary.
*
* Iterates over all properties registered with object and execute getters
* of those, which are readable and which interface matches interface
* specified as argument. Obtained properties values are stored in
* dict_iter dictionary.
*/
dbus_bool_t wpa_dbus_get_object_properties(struct wpas_dbus_priv *iface,
const char *path,
const char *interface,
DBusMessageIter *iter)
{
struct wpa_dbus_object_desc *obj_desc = NULL;
DBusMessageIter dict_iter;
DBusError error;
dbus_connection_get_object_path_data(iface->con, path,
(void **) &obj_desc);
if (!obj_desc) {
wpa_printf(MSG_ERROR,
"dbus: %s: could not obtain object's private data: %s",
__func__, path);
return FALSE;
}
if (!wpa_dbus_dict_open_write(iter, &dict_iter)) {
wpa_printf(MSG_ERROR, "dbus: %s: failed to open message dict",
__func__);
return FALSE;
}
dbus_error_init(&error);
if (!fill_dict_with_properties(&dict_iter, obj_desc->properties,
interface, obj_desc->user_data,
&error)) {
wpa_printf(MSG_ERROR,
"dbus: %s: failed to get object properties: (%s) %s",
__func__,
dbus_error_is_set(&error) ? error.name : "none",
dbus_error_is_set(&error) ? error.message : "none");
dbus_error_free(&error);
return FALSE;
}
return wpa_dbus_dict_close_write(iter, &dict_iter);
}
/**
* wpas_dbus_new_decompose_object_path - Decompose an interface object path into parts
* @path: The dbus object path
* @sep: Separating part (e.g., "Networks" or "PersistentGroups")
* @item: (out) The part following the specified separator, if any
* Returns: The object path of the interface this path refers to
*
* For a given object path, decomposes the object path into object id and
* requested part, if those parts exist. The caller is responsible for freeing
* the returned value. The *item pointer points to that allocated value and must
* not be freed separately.
*
* As an example, path = "/fi/w1/wpa_supplicant1/Interfaces/1/Networks/0" and
* sep = "Networks" would result in "/fi/w1/wpa_supplicant1/Interfaces/1"
* getting returned and *items set to point to "0".
*/
char * wpas_dbus_new_decompose_object_path(const char *path, const char *sep,
char **item)
{
const unsigned int dev_path_prefix_len =
os_strlen(WPAS_DBUS_NEW_PATH_INTERFACES "/");
char *obj_path_only;
char *pos;
size_t sep_len;
*item = NULL;
/* Verify that this starts with our interface prefix */
if (os_strncmp(path, WPAS_DBUS_NEW_PATH_INTERFACES "/",
dev_path_prefix_len) != 0)
return NULL; /* not our path */
/* Ensure there's something at the end of the path */
if ((path + dev_path_prefix_len)[0] == '\0')
return NULL;
obj_path_only = os_strdup(path);
if (obj_path_only == NULL)
return NULL;
pos = obj_path_only + dev_path_prefix_len;
pos = os_strchr(pos, '/');
if (pos == NULL)
return obj_path_only; /* no next item on the path */
/* Separate network interface prefix from the path */
*pos++ = '\0';
sep_len = os_strlen(sep);
if (os_strncmp(pos, sep, sep_len) != 0 || pos[sep_len] != '/')
return obj_path_only; /* no match */
/* return a pointer to the requested item */
*item = pos + sep_len + 1;
return obj_path_only;
}
/**
* wpas_dbus_reply_new_from_error - Create a new D-Bus error message from a
* dbus error structure
* @message: The original request message for which the error is a reply
* @error: The error containing a name and a descriptive error cause
* @fallback_name: A generic error name if @error was not set
* @fallback_string: A generic error string if @error was not set
* Returns: A new D-Bus error message
*
* Given a DBusMessage structure, creates a new D-Bus error message using
* the error name and string contained in that structure.
*/
DBusMessage * wpas_dbus_reply_new_from_error(DBusMessage *message,
DBusError *error,
const char *fallback_name,
const char *fallback_string)
{
if (error && error->name && error->message) {
return dbus_message_new_error(message, error->name,
error->message);
}
if (fallback_name && fallback_string) {
return dbus_message_new_error(message, fallback_name,
fallback_string);
}
return NULL;
}