mirror of git://git.sysmocom.de/ofono
Fix signal watch when a service name is given
The bus name should be resolved when adding a watch by service name since messages do always come with sender set to owner's bus name, also it should listen to owner updates since it can change without invalidating the watch.
This commit is contained in:
Luiz Augusto Von Dentz
Marcel Holtmann
parent
93d5bd6af8
commit
79e5dc585d
161
gdbus/watch.c
161
gdbus/watch.c
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@ -55,19 +55,22 @@ struct filter_callback {
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struct filter_data {
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DBusConnection *connection;
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DBusHandleMessageFunction handle_func;
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char *sender;
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char *name;
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char *owner;
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char *path;
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char *interface;
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char *member;
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char *argument;
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GSList *callbacks;
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GSList *processed;
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guint name_watch;
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gboolean lock;
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gboolean registered;
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};
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static struct filter_data *filter_data_find(DBusConnection *connection,
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const char *sender,
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const char *name,
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const char *owner,
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const char *path,
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const char *interface,
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const char *member,
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@ -82,8 +85,12 @@ static struct filter_data *filter_data_find(DBusConnection *connection,
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if (connection != data->connection)
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continue;
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if (sender && data->sender &&
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g_str_equal(sender, data->sender) == FALSE)
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if (name && data->name &&
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g_str_equal(name, data->name) == FALSE)
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continue;
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if (owner && data->owner &&
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g_str_equal(owner, data->owner) == FALSE)
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continue;
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if (path && data->path &&
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@ -110,13 +117,15 @@ static struct filter_data *filter_data_find(DBusConnection *connection,
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static void format_rule(struct filter_data *data, char *rule, size_t size)
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{
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const char *sender;
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int offset;
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offset = snprintf(rule, size, "type='signal'");
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sender = data->name ? : data->owner;
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if (data->sender)
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if (sender)
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offset += snprintf(rule + offset, size - offset,
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",sender='%s'", data->sender);
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",sender='%s'", sender);
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if (data->path)
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offset += snprintf(rule + offset, size - offset,
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",path='%s'", data->path);
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@ -183,8 +192,10 @@ static struct filter_data *filter_data_get(DBusConnection *connection,
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const char *argument)
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{
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struct filter_data *data;
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const char *name = NULL, *owner = NULL;
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if (!filter_data_find(connection, NULL, NULL, NULL, NULL, NULL)) {
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if (!filter_data_find(connection, NULL, NULL, NULL, NULL, NULL,
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NULL)) {
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if (!dbus_connection_add_filter(connection,
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message_filter, NULL, NULL)) {
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error("dbus_connection_add_filter() failed");
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@ -192,15 +203,25 @@ static struct filter_data *filter_data_get(DBusConnection *connection,
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}
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}
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data = filter_data_find(connection, sender, path, interface, member,
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argument);
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if (sender == NULL)
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goto proceed;
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if (sender[0] == ':')
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owner = sender;
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else
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name = sender;
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proceed:
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data = filter_data_find(connection, name, owner, path, interface,
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member, argument);
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if (data)
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return data;
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data = g_new0(struct filter_data, 1);
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data->connection = dbus_connection_ref(connection);
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data->sender = g_strdup(sender);
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data->name = name ? g_strdup(name) : NULL;
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data->owner = owner ? g_strdup(owner) : NULL;
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data->path = g_strdup(path);
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data->interface = g_strdup(interface);
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data->member = g_strdup(member);
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@ -244,7 +265,9 @@ static void filter_data_free(struct filter_data *data)
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g_free(l->data);
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g_slist_free(data->callbacks);
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g_free(data->sender);
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g_dbus_remove_watch(data->connection, data->name_watch);
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g_free(data->name);
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g_free(data->owner);
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g_free(data->path);
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g_free(data->interface);
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g_free(data->member);
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@ -322,7 +345,8 @@ static gboolean filter_data_remove_callback(struct filter_data *data,
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filter_data_free(data);
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/* Remove filter if there are no listeners left for the connection */
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data = filter_data_find(connection, NULL, NULL, NULL, NULL, NULL);
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data = filter_data_find(connection, NULL, NULL, NULL, NULL, NULL,
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NULL);
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if (!data)
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dbus_connection_remove_filter(connection, message_filter,
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NULL);
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@ -359,6 +383,37 @@ static DBusHandlerResult signal_filter(DBusConnection *connection,
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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static void update_name_cache(const char *name, const char *owner)
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{
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GSList *l;
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for (l = listeners; l != NULL; l = l->next) {
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struct filter_data *data = l->data;
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if (g_strcmp0(data->name, name) != 0)
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continue;
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g_free(data->owner);
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data->owner = g_strdup(owner);
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}
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}
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static const char *check_name_cache(const char *name)
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{
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GSList *l;
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for (l = listeners; l != NULL; l = l->next) {
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struct filter_data *data = l->data;
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if (g_strcmp0(data->name, name) != 0)
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continue;
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return data->owner;
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}
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return NULL;
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}
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static DBusHandlerResult service_filter(DBusConnection *connection,
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DBusMessage *message, void *user_data)
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{
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@ -375,6 +430,8 @@ static DBusHandlerResult service_filter(DBusConnection *connection,
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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}
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update_name_cache(name, new);
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while (data->callbacks) {
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cb = data->callbacks->data;
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@ -422,7 +479,9 @@ static DBusHandlerResult message_filter(DBusConnection *connection,
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member = dbus_message_get_member(message);
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dbus_message_get_args(message, NULL, DBUS_TYPE_STRING, &arg, DBUS_TYPE_INVALID);
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data = filter_data_find(connection, sender, path, iface, member, arg);
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/* Sender is always bus name */
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data = filter_data_find(connection, NULL, sender, path, iface, member,
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arg);
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if (!data) {
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error("Got %s.%s signal which has no listeners", iface, member);
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return DBUS_HANDLER_RESULT_NOT_YET_HANDLED;
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@ -447,7 +506,8 @@ static DBusHandlerResult message_filter(DBusConnection *connection,
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filter_data_free(data);
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/* Remove filter if there no listener left for the connection */
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data = filter_data_find(connection, NULL, NULL, NULL, NULL, NULL);
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data = filter_data_find(connection, NULL, NULL, NULL, NULL, NULL,
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NULL);
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if (!data)
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dbus_connection_remove_filter(connection, message_filter,
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NULL);
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@ -457,38 +517,60 @@ static DBusHandlerResult message_filter(DBusConnection *connection,
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struct service_data {
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DBusConnection *conn;
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char *name;
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const char *owner;
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GDBusWatchFunction conn_func;
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void *user_data;
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};
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static void service_data_free(struct service_data *data)
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{
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dbus_connection_unref(data->conn);
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g_free(data->name);
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g_free(data);
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}
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static gboolean update_service(void *user_data)
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{
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struct service_data *data = user_data;
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update_name_cache(data->name, data->owner);
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if (data->conn_func)
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data->conn_func(data->conn, data->user_data);
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service_data_free(data);
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return FALSE;
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}
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static void service_reply(DBusPendingCall *call, void *user_data)
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{
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struct service_data *data = user_data;
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DBusMessage *reply;
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DBusError error;
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dbus_bool_t has_owner;
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DBusError err;
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reply = dbus_pending_call_steal_reply(call);
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if (reply == NULL)
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return;
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dbus_error_init(&error);
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dbus_error_init(&err);
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if (dbus_message_get_args(reply, &error,
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DBUS_TYPE_BOOLEAN, &has_owner,
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DBUS_TYPE_INVALID) == FALSE) {
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if (dbus_error_is_set(&error) == TRUE) {
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error("%s", error.message);
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dbus_error_free(&error);
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} else {
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error("Wrong arguments for NameHasOwner reply");
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}
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goto done;
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}
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if (dbus_set_error_from_message(&err, reply))
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goto fail;
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if (has_owner && data->conn_func)
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data->conn_func(data->conn, data->user_data);
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if (dbus_message_get_args(reply, &err,
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DBUS_TYPE_STRING, &data->owner,
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DBUS_TYPE_INVALID) == FALSE)
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goto fail;
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update_service(data);
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goto done;
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fail:
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error("%s", err.message);
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dbus_error_free(&err);
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service_data_free(data);
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done:
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dbus_message_unref(reply);
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}
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@ -506,12 +588,19 @@ static void check_service(DBusConnection *connection, const char *name,
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return;
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}
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data->conn = connection;
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data->conn = dbus_connection_ref(connection);
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data->name = g_strdup(name);
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data->conn_func = connect;
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data->user_data = user_data;
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data->owner = check_name_cache(name);
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if (data->owner != NULL) {
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g_idle_add(update_service, data);
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return;
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}
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message = dbus_message_new_method_call(DBUS_SERVICE_DBUS,
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DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "NameHasOwner");
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DBUS_PATH_DBUS, DBUS_INTERFACE_DBUS, "GetNameOwner");
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if (message == NULL) {
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error("Can't allocate new message");
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g_free(data);
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@ -597,6 +686,11 @@ guint g_dbus_add_signal_watch(DBusConnection *connection,
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if (!cb)
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return 0;
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if (data->name != NULL && data->name_watch == 0)
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data->name_watch = g_dbus_add_service_watch(connection,
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data->name, NULL,
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NULL, NULL, NULL);
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return cb->id;
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}
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@ -626,7 +720,8 @@ void g_dbus_remove_all_watches(DBusConnection *connection)
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{
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struct filter_data *data;
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while ((data = filter_data_find(connection, NULL, NULL, NULL, NULL, NULL))) {
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while ((data = filter_data_find(connection, NULL, NULL, NULL, NULL,
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NULL, NULL))) {
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listeners = g_slist_remove(listeners, data);
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filter_data_call_and_free(data);
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}
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