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gio/tests/gdbus-peer: Exercise fds attached to a large message
This incidentally also exercises the intended pattern for sending fds in a D-Bus message: the fd list is meant to contain exactly those fds that are referenced by a handle (type 'h') in the body of the message, with numeric handle value n corresponding to g_unix_fd_list_peek_fds(...)[n]. Being able to send and receive file descriptors that are not referenced by a handle (as in OpenFile here) is a quirk of the GDBus API, and while it's entirely possible in the wire protocol, other D-Bus implementations like libdbus and sd-bus typically don't provide APIs that make this possible. Reproduces: https://gitlab.gnome.org/GNOME/glib/-/issues/2074 Signed-off-by: Simon McVittie <smcv@collabora.com>
This commit is contained in:
Simon McVittie
parent
70279f8446
commit
e5cee9ce5a
@ -76,6 +76,12 @@ typedef struct
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gboolean signal_received;
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} PeerData;
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/* This needs to be enough to usually take more than one write(),
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* to reproduce
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* <https://gitlab.gnome.org/GNOME/glib/-/issues/2074>.
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* 1 MiB ought to be enough. */
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#define BIG_MESSAGE_ARRAY_SIZE (1024 * 1024)
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static const gchar *test_interface_introspection_xml =
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"<node>"
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" <interface name='org.gtk.GDBus.PeerTestInterface'>"
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@ -88,6 +94,11 @@ static const gchar *test_interface_introspection_xml =
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" <method name='OpenFile'>"
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" <arg type='s' name='path' direction='in'/>"
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" </method>"
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" <method name='OpenFileWithBigMessage'>"
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" <arg type='s' name='path' direction='in'/>"
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" <arg type='h' name='handle' direction='out'/>"
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" <arg type='ay' name='junk' direction='out'/>"
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" </method>"
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" <signal name='PeerSignal'>"
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" <arg type='s' name='a_string'/>"
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" </signal>"
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@ -164,7 +175,8 @@ test_interface_method_call (GDBusConnection *connection,
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g_dbus_method_invocation_return_value (invocation, NULL);
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}
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else if (g_strcmp0 (method_name, "OpenFile") == 0)
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else if (g_strcmp0 (method_name, "OpenFile") == 0 ||
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g_strcmp0 (method_name, "OpenFileWithBigMessage") == 0)
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{
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#ifdef G_OS_UNIX
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const gchar *path;
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@ -190,6 +202,21 @@ test_interface_method_call (GDBusConnection *connection,
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g_object_unref (fd_list);
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g_object_unref (invocation);
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if (g_strcmp0 (method_name, "OpenFileWithBigMessage") == 0)
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{
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char *junk;
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junk = g_new0 (char, BIG_MESSAGE_ARRAY_SIZE);
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g_dbus_message_set_body (reply,
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g_variant_new ("(h@ay)",
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0,
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g_variant_new_fixed_array (G_VARIANT_TYPE_BYTE,
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junk,
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BIG_MESSAGE_ARRAY_SIZE,
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1)));
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g_free (junk);
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}
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error = NULL;
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g_dbus_connection_send_message (connection,
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reply,
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@ -723,6 +750,7 @@ do_test_peer (void)
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const gchar *s;
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GThread *service_thread;
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gulong signal_handler_id;
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gsize i;
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memset (&data, '\0', sizeof (PeerData));
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data.current_connections = g_ptr_array_new_with_free_func (g_object_unref);
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@ -843,73 +871,116 @@ do_test_peer (void)
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g_assert_cmpint (data.num_method_calls, ==, 3);
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g_signal_handler_disconnect (proxy, signal_handler_id);
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/* check for UNIX fd passing */
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/*
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* Check for UNIX fd passing.
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*
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* The first time through, we use a very simple method call. Note that
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* because this does not have a G_VARIANT_TYPE_HANDLE in the message body
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* to refer to the fd, it is a GDBus-specific idiom that would not
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* interoperate with libdbus or sd-bus
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* (see <https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1726>).
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*
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* The second time, we call a method that returns a fd attached to a
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* large message, to reproduce
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* <https://gitlab.gnome.org/GNOME/glib/-/issues/2074>. It also happens
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* to follow the more usual pattern for D-Bus messages containing a
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* G_VARIANT_TYPE_HANDLE to refer to attached fds.
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*/
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for (i = 0; i < 2; i++)
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{
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#ifdef G_OS_UNIX
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{
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GDBusMessage *method_call_message;
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GDBusMessage *method_reply_message;
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GUnixFDList *fd_list;
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gint fd;
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gchar *buf;
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gsize len;
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gchar *buf2;
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gsize len2;
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const char *testfile = g_test_get_filename (G_TEST_DIST, "file.c", NULL);
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GDBusMessage *method_call_message;
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GDBusMessage *method_reply_message;
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GUnixFDList *fd_list;
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gint fd;
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gchar *buf;
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gsize len;
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gchar *buf2;
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gsize len2;
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const char *testfile = g_test_get_filename (G_TEST_DIST, "file.c", NULL);
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const char *method = "OpenFile";
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GVariant *body;
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method_call_message = g_dbus_message_new_method_call (NULL, /* name */
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"/org/gtk/GDBus/PeerTestObject",
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"org.gtk.GDBus.PeerTestInterface",
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"OpenFile");
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g_dbus_message_set_body (method_call_message, g_variant_new ("(s)", testfile));
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error = NULL;
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method_reply_message = g_dbus_connection_send_message_with_reply_sync (c,
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method_call_message,
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G_DBUS_SEND_MESSAGE_FLAGS_NONE,
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-1,
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NULL, /* out_serial */
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NULL, /* cancellable */
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&error);
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g_assert_no_error (error);
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g_assert (g_dbus_message_get_message_type (method_reply_message) == G_DBUS_MESSAGE_TYPE_METHOD_RETURN);
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fd_list = g_dbus_message_get_unix_fd_list (method_reply_message);
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g_assert (fd_list != NULL);
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g_assert_cmpint (g_unix_fd_list_get_length (fd_list), ==, 1);
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error = NULL;
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fd = g_unix_fd_list_get (fd_list, 0, &error);
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g_assert_no_error (error);
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g_object_unref (method_call_message);
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g_object_unref (method_reply_message);
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if (i == 1)
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method = "OpenFileWithBigMessage";
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error = NULL;
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len = 0;
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buf = read_all_from_fd (fd, &len, &error);
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g_assert_no_error (error);
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g_assert (buf != NULL);
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close (fd);
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method_call_message = g_dbus_message_new_method_call (NULL, /* name */
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"/org/gtk/GDBus/PeerTestObject",
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"org.gtk.GDBus.PeerTestInterface",
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method);
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g_dbus_message_set_body (method_call_message, g_variant_new ("(s)", testfile));
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error = NULL;
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method_reply_message = g_dbus_connection_send_message_with_reply_sync (c,
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method_call_message,
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G_DBUS_SEND_MESSAGE_FLAGS_NONE,
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-1,
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NULL, /* out_serial */
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NULL, /* cancellable */
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&error);
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g_assert_no_error (error);
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g_assert (g_dbus_message_get_message_type (method_reply_message) == G_DBUS_MESSAGE_TYPE_METHOD_RETURN);
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error = NULL;
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g_file_get_contents (testfile,
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&buf2,
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&len2,
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&error);
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g_assert_no_error (error);
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g_assert_cmpmem (buf, len, buf2, len2);
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g_free (buf2);
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g_free (buf);
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}
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body = g_dbus_message_get_body (method_reply_message);
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if (i == 1)
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{
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gint32 handle = -1;
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GVariant *junk = NULL;
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g_assert_cmpstr (g_variant_get_type_string (body), ==, "(hay)");
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g_variant_get (body, "(h@ay)", &handle, &junk);
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g_assert_cmpint (handle, ==, 0);
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g_assert_cmpuint (g_variant_n_children (junk), ==, BIG_MESSAGE_ARRAY_SIZE);
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g_variant_unref (junk);
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}
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else
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{
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g_assert_null (body);
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}
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fd_list = g_dbus_message_get_unix_fd_list (method_reply_message);
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g_assert (fd_list != NULL);
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g_assert_cmpint (g_unix_fd_list_get_length (fd_list), ==, 1);
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error = NULL;
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fd = g_unix_fd_list_get (fd_list, 0, &error);
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g_assert_no_error (error);
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g_object_unref (method_call_message);
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g_object_unref (method_reply_message);
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error = NULL;
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len = 0;
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buf = read_all_from_fd (fd, &len, &error);
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g_assert_no_error (error);
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g_assert (buf != NULL);
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close (fd);
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error = NULL;
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g_file_get_contents (testfile,
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&buf2,
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&len2,
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&error);
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g_assert_no_error (error);
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g_assert_cmpmem (buf, len, buf2, len2);
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g_free (buf2);
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g_free (buf);
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#else
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error = NULL;
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result = g_dbus_proxy_call_sync (proxy,
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"OpenFile",
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g_variant_new ("(s)", "boo"),
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G_DBUS_CALL_FLAGS_NONE,
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-1,
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NULL, /* GCancellable */
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&error);
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g_assert_error (error, G_IO_ERROR, G_IO_ERROR_DBUS_ERROR);
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g_assert (result == NULL);
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g_error_free (error);
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/* We do the same number of iterations on non-Unix, so that
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* the method call count will match. In this case we use
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* OpenFile both times, because the difference between this
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* and OpenFileWithBigMessage is only relevant on Unix. */
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error = NULL;
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result = g_dbus_proxy_call_sync (proxy,
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"OpenFile",
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g_variant_new ("(s)", "boo"),
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G_DBUS_CALL_FLAGS_NONE,
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-1,
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NULL, /* GCancellable */
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&error);
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g_assert_error (error, G_IO_ERROR, G_IO_ERROR_DBUS_ERROR);
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g_assert (result == NULL);
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g_error_free (error);
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#endif /* G_OS_UNIX */
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}
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/* Check that g_socket_get_credentials() work - (though this really
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* should be in socket.c)
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@ -1017,7 +1088,7 @@ do_test_peer (void)
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g_variant_get (result, "(&s)", &s);
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g_assert_cmpstr (s, ==, "You greeted me with 'Hey Again Peer!'.");
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g_variant_unref (result);
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g_assert_cmpint (data.num_method_calls, ==, 5);
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g_assert_cmpint (data.num_method_calls, ==, 6);
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#if 0
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/* TODO: THIS TEST DOESN'T WORK YET */
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