1 /* GDBus - GLib D-Bus Library
3 * Copyright (C) 2008-2010 Red Hat, Inc.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General
16 * Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 * Author: David Zeuthen <davidz@redhat.com>
21 /* Uncomment to debug serializer code */
22 /* #define DEBUG_SERIALIZER */
28 #include <sys/types.h>
32 #include <sys/mkdev.h>
33 #elif MAJOR_IN_SYSMACROS
34 #include <sys/sysmacros.h>
37 #include "gdbusutils.h"
38 #include "gdbusmessage.h"
39 #include "gdbuserror.h"
40 #include "gioenumtypes.h"
41 #include "ginputstream.h"
42 #include "gdatainputstream.h"
43 #include "gmemoryinputstream.h"
44 #include "goutputstream.h"
45 #include "gdataoutputstream.h"
46 #include "gmemoryoutputstream.h"
47 #include "gseekable.h"
49 #include "gdbusprivate.h"
52 #include "gunixfdlist.h"
57 typedef struct _GMemoryBuffer GMemoryBuffer;
64 GDataStreamByteOrder byte_order;
68 g_memory_buffer_read_byte (GMemoryBuffer *mbuf,
71 if (mbuf->pos >= mbuf->valid_len)
73 return mbuf->data [mbuf->pos++];
77 g_memory_buffer_read_int16 (GMemoryBuffer *mbuf,
82 if (mbuf->pos > mbuf->valid_len - 2)
84 mbuf->pos = mbuf->valid_len;
88 memcpy (&v, mbuf->data + mbuf->pos, 2);
90 switch (mbuf->byte_order)
92 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
93 v = GINT16_FROM_BE (v);
95 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
96 v = GINT16_FROM_LE (v);
98 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
106 g_memory_buffer_read_uint16 (GMemoryBuffer *mbuf,
111 if (mbuf->pos > mbuf->valid_len - 2)
113 mbuf->pos = mbuf->valid_len;
117 memcpy (&v, mbuf->data + mbuf->pos, 2);
119 switch (mbuf->byte_order)
121 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
122 v = GINT16_FROM_BE (v);
124 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
125 v = GINT16_FROM_LE (v);
127 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
135 g_memory_buffer_read_int32 (GMemoryBuffer *mbuf,
140 if (mbuf->pos > mbuf->valid_len - 4)
142 mbuf->pos = mbuf->valid_len;
146 memcpy (&v, mbuf->data + mbuf->pos, 4);
148 switch (mbuf->byte_order)
150 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
151 v = GINT32_FROM_BE (v);
153 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
154 v = GINT32_FROM_LE (v);
156 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
164 g_memory_buffer_read_uint32 (GMemoryBuffer *mbuf,
169 if (mbuf->pos > mbuf->valid_len - 4)
171 mbuf->pos = mbuf->valid_len;
175 memcpy (&v, mbuf->data + mbuf->pos, 4);
177 switch (mbuf->byte_order)
179 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
180 v = GUINT32_FROM_BE (v);
182 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
183 v = GUINT32_FROM_LE (v);
185 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
193 g_memory_buffer_read_int64 (GMemoryBuffer *mbuf,
198 if (mbuf->pos > mbuf->valid_len - 8)
200 mbuf->pos = mbuf->valid_len;
204 memcpy (&v, mbuf->data + mbuf->pos, 8);
206 switch (mbuf->byte_order)
208 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
209 v = GINT64_FROM_BE (v);
211 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
212 v = GINT64_FROM_LE (v);
214 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
222 g_memory_buffer_read_uint64 (GMemoryBuffer *mbuf,
227 if (mbuf->pos > mbuf->valid_len - 8)
229 mbuf->pos = mbuf->valid_len;
233 memcpy (&v, mbuf->data + mbuf->pos, 8);
235 switch (mbuf->byte_order)
237 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
238 v = GUINT64_FROM_BE (v);
240 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
241 v = GUINT64_FROM_LE (v);
243 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
250 #define MIN_ARRAY_SIZE 128
253 g_nearest_pow (gint num)
264 array_resize (GMemoryBuffer *mbuf,
270 if (mbuf->len == size)
274 data = g_realloc (mbuf->data, size);
277 memset ((guint8 *)data + len, 0, size - len);
282 if (mbuf->len < mbuf->valid_len)
283 mbuf->valid_len = mbuf->len;
287 g_memory_buffer_write (GMemoryBuffer *mbuf,
297 /* Check for address space overflow, but only if the buffer is resizable.
298 Otherwise we just do a short write and don't worry. */
299 if (mbuf->pos + count < mbuf->pos)
302 if (mbuf->pos + count > mbuf->len)
304 /* At least enought to fit the write, rounded up
305 for greater than linear growth.
306 TODO: This wastes a lot of memory at large buffer sizes.
307 Figure out a more rational allocation strategy. */
308 new_size = g_nearest_pow (mbuf->pos + count);
309 /* Check for overflow again. We have only checked if
310 pos + count > G_MAXSIZE, but it only catches the case of writing
311 more than 4GiB total on a 32-bit system. There's still the problem
312 of g_nearest_pow overflowing above 0x7fffffff, so we're
313 effectively limited to 2GiB. */
314 if (new_size < mbuf->len)
317 new_size = MAX (new_size, MIN_ARRAY_SIZE);
318 array_resize (mbuf, new_size);
321 dest = (guint8 *)mbuf->data + mbuf->pos;
322 memcpy (dest, buffer, count);
325 if (mbuf->pos > mbuf->valid_len)
326 mbuf->valid_len = mbuf->pos;
332 g_memory_buffer_put_byte (GMemoryBuffer *mbuf,
335 return g_memory_buffer_write (mbuf, &data, 1);
339 g_memory_buffer_put_int16 (GMemoryBuffer *mbuf,
342 switch (mbuf->byte_order)
344 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
345 data = GINT16_TO_BE (data);
347 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
348 data = GINT16_TO_LE (data);
350 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
355 return g_memory_buffer_write (mbuf, &data, 2);
359 g_memory_buffer_put_uint16 (GMemoryBuffer *mbuf,
362 switch (mbuf->byte_order)
364 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
365 data = GUINT16_TO_BE (data);
367 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
368 data = GUINT16_TO_LE (data);
370 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
375 return g_memory_buffer_write (mbuf, &data, 2);
379 g_memory_buffer_put_int32 (GMemoryBuffer *mbuf,
382 switch (mbuf->byte_order)
384 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
385 data = GINT32_TO_BE (data);
387 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
388 data = GINT32_TO_LE (data);
390 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
395 return g_memory_buffer_write (mbuf, &data, 4);
399 g_memory_buffer_put_uint32 (GMemoryBuffer *mbuf,
402 switch (mbuf->byte_order)
404 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
405 data = GUINT32_TO_BE (data);
407 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
408 data = GUINT32_TO_LE (data);
410 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
415 return g_memory_buffer_write (mbuf, &data, 4);
419 g_memory_buffer_put_int64 (GMemoryBuffer *mbuf,
422 switch (mbuf->byte_order)
424 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
425 data = GINT64_TO_BE (data);
427 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
428 data = GINT64_TO_LE (data);
430 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
435 return g_memory_buffer_write (mbuf, &data, 8);
439 g_memory_buffer_put_uint64 (GMemoryBuffer *mbuf,
442 switch (mbuf->byte_order)
444 case G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN:
445 data = GUINT64_TO_BE (data);
447 case G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN:
448 data = GUINT64_TO_LE (data);
450 case G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN:
455 return g_memory_buffer_write (mbuf, &data, 8);
459 g_memory_buffer_put_string (GMemoryBuffer *mbuf,
462 g_return_val_if_fail (str != NULL, FALSE);
464 return g_memory_buffer_write (mbuf, str, strlen (str));
469 * SECTION:gdbusmessage
470 * @short_description: D-Bus Message
471 * @include: gio/gio.h
473 * A type for representing D-Bus messages that can be sent or received
474 * on a #GDBusConnection.
477 typedef struct _GDBusMessageClass GDBusMessageClass;
482 * Class structure for #GDBusMessage.
486 struct _GDBusMessageClass
489 GObjectClass parent_class;
495 * The #GDBusMessage structure contains only private data and should
496 * only be accessed using the provided API.
503 GObject parent_instance;
505 GDBusMessageType type;
506 GDBusMessageFlags flags;
508 GDBusMessageByteOrder byte_order;
509 guchar major_protocol_version;
514 GUnixFDList *fd_list;
524 G_DEFINE_TYPE (GDBusMessage, g_dbus_message, G_TYPE_OBJECT);
527 g_dbus_message_finalize (GObject *object)
529 GDBusMessage *message = G_DBUS_MESSAGE (object);
531 if (message->headers != NULL)
532 g_hash_table_unref (message->headers);
533 if (message->body != NULL)
534 g_variant_unref (message->body);
536 if (message->fd_list != NULL)
537 g_object_unref (message->fd_list);
540 if (G_OBJECT_CLASS (g_dbus_message_parent_class)->finalize != NULL)
541 G_OBJECT_CLASS (g_dbus_message_parent_class)->finalize (object);
545 g_dbus_message_get_property (GObject *object,
550 GDBusMessage *message = G_DBUS_MESSAGE (object);
555 g_value_set_boolean (value, g_dbus_message_get_locked (message));
559 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
565 g_dbus_message_class_init (GDBusMessageClass *klass)
567 GObjectClass *gobject_class;
569 gobject_class = G_OBJECT_CLASS (klass);
570 gobject_class->finalize = g_dbus_message_finalize;
571 gobject_class->get_property = g_dbus_message_get_property;
574 * GDBusConnection:locked:
576 * A boolean specifying whether the message is locked.
580 g_object_class_install_property (gobject_class,
582 g_param_spec_boolean ("locked",
584 P_("Whether the message is locked"),
587 G_PARAM_STATIC_NAME |
588 G_PARAM_STATIC_BLURB |
589 G_PARAM_STATIC_NICK));
593 g_dbus_message_init (GDBusMessage *message)
595 /* Any D-Bus implementation is supposed to handle both Big and
596 * Little Endian encodings and the Endianness is part of the D-Bus
597 * message - we prefer to use Big Endian (since it's Network Byte
598 * Order and just easier to read for humans) but if the machine is
599 * Little Endian we use that for performance reasons.
601 #if G_BYTE_ORDER == G_LITTLE_ENDIAN
602 message->byte_order = G_DBUS_MESSAGE_BYTE_ORDER_LITTLE_ENDIAN;
604 /* this could also be G_PDP_ENDIAN */
605 message->byte_order = G_DBUS_MESSAGE_BYTE_ORDER_BIG_ENDIAN;
607 message->headers = g_hash_table_new_full (g_direct_hash,
610 (GDestroyNotify) g_variant_unref);
614 * g_dbus_message_new:
616 * Creates a new empty #GDBusMessage.
618 * Returns: A #GDBusMessage. Free with g_object_unref().
623 g_dbus_message_new (void)
625 return g_object_new (G_TYPE_DBUS_MESSAGE, NULL);
629 * g_dbus_message_new_method_call:
630 * @name: (allow-none): A valid D-Bus name or %NULL.
631 * @path: A valid object path.
632 * @interface_: (allow-none): A valid D-Bus interface name or %NULL.
633 * @method: A valid method name.
635 * Creates a new #GDBusMessage for a method call.
637 * Returns: A #GDBusMessage. Free with g_object_unref().
642 g_dbus_message_new_method_call (const gchar *name,
644 const gchar *interface_,
647 GDBusMessage *message;
649 g_return_val_if_fail (name == NULL || g_dbus_is_name (name), NULL);
650 g_return_val_if_fail (g_variant_is_object_path (path), NULL);
651 g_return_val_if_fail (g_dbus_is_member_name (method), NULL);
652 g_return_val_if_fail (interface_ == NULL || g_dbus_is_interface_name (interface_), NULL);
654 message = g_dbus_message_new ();
655 message->type = G_DBUS_MESSAGE_TYPE_METHOD_CALL;
658 g_dbus_message_set_destination (message, name);
659 g_dbus_message_set_path (message, path);
660 g_dbus_message_set_member (message, method);
661 if (interface_ != NULL)
662 g_dbus_message_set_interface (message, interface_);
668 * g_dbus_message_new_signal:
669 * @path: A valid object path.
670 * @interface_: A valid D-Bus interface name.
671 * @signal: A valid signal name.
673 * Creates a new #GDBusMessage for a signal emission.
675 * Returns: A #GDBusMessage. Free with g_object_unref().
680 g_dbus_message_new_signal (const gchar *path,
681 const gchar *interface_,
684 GDBusMessage *message;
686 g_return_val_if_fail (g_variant_is_object_path (path), NULL);
687 g_return_val_if_fail (g_dbus_is_member_name (signal), NULL);
688 g_return_val_if_fail (g_dbus_is_interface_name (interface_), NULL);
690 message = g_dbus_message_new ();
691 message->type = G_DBUS_MESSAGE_TYPE_SIGNAL;
692 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
694 g_dbus_message_set_path (message, path);
695 g_dbus_message_set_member (message, signal);
696 g_dbus_message_set_interface (message, interface_);
703 * g_dbus_message_new_method_reply:
704 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
705 * create a reply message to.
707 * Creates a new #GDBusMessage that is a reply to @method_call_message.
709 * Returns: (transfer full): #GDBusMessage. Free with g_object_unref().
714 g_dbus_message_new_method_reply (GDBusMessage *method_call_message)
716 GDBusMessage *message;
719 g_return_val_if_fail (G_IS_DBUS_MESSAGE (method_call_message), NULL);
720 g_return_val_if_fail (g_dbus_message_get_message_type (method_call_message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL, NULL);
721 g_return_val_if_fail (g_dbus_message_get_serial (method_call_message) != 0, NULL);
723 message = g_dbus_message_new ();
724 message->type = G_DBUS_MESSAGE_TYPE_METHOD_RETURN;
725 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
726 /* reply with same endianness */
727 message->byte_order = method_call_message->byte_order;
729 g_dbus_message_set_reply_serial (message, g_dbus_message_get_serial (method_call_message));
730 sender = g_dbus_message_get_sender (method_call_message);
732 g_dbus_message_set_destination (message, sender);
738 * g_dbus_message_new_method_error:
739 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
740 * create a reply message to.
741 * @error_name: A valid D-Bus error name.
742 * @error_message_format: The D-Bus error message in a printf() format.
743 * @...: Arguments for @error_message_format.
745 * Creates a new #GDBusMessage that is an error reply to @method_call_message.
747 * Returns: (transfer full): A #GDBusMessage. Free with g_object_unref().
752 g_dbus_message_new_method_error (GDBusMessage *method_call_message,
753 const gchar *error_name,
754 const gchar *error_message_format,
760 va_start (var_args, error_message_format);
761 ret = g_dbus_message_new_method_error_valist (method_call_message,
763 error_message_format,
771 * g_dbus_message_new_method_error_literal:
772 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
773 * create a reply message to.
774 * @error_name: A valid D-Bus error name.
775 * @error_message: The D-Bus error message.
777 * Creates a new #GDBusMessage that is an error reply to @method_call_message.
779 * Returns: (transfer full): A #GDBusMessage. Free with g_object_unref().
784 g_dbus_message_new_method_error_literal (GDBusMessage *method_call_message,
785 const gchar *error_name,
786 const gchar *error_message)
788 GDBusMessage *message;
791 g_return_val_if_fail (G_IS_DBUS_MESSAGE (method_call_message), NULL);
792 g_return_val_if_fail (g_dbus_message_get_message_type (method_call_message) == G_DBUS_MESSAGE_TYPE_METHOD_CALL, NULL);
793 g_return_val_if_fail (g_dbus_message_get_serial (method_call_message) != 0, NULL);
794 g_return_val_if_fail (g_dbus_is_name (error_name), NULL);
795 g_return_val_if_fail (error_message != NULL, NULL);
797 message = g_dbus_message_new ();
798 message->type = G_DBUS_MESSAGE_TYPE_ERROR;
799 message->flags = G_DBUS_MESSAGE_FLAGS_NO_REPLY_EXPECTED;
800 /* reply with same endianness */
801 message->byte_order = method_call_message->byte_order;
803 g_dbus_message_set_reply_serial (message, g_dbus_message_get_serial (method_call_message));
804 g_dbus_message_set_error_name (message, error_name);
805 g_dbus_message_set_body (message, g_variant_new ("(s)", error_message));
807 sender = g_dbus_message_get_sender (method_call_message);
809 g_dbus_message_set_destination (message, sender);
815 * g_dbus_message_new_method_error_valist:
816 * @method_call_message: A message of type %G_DBUS_MESSAGE_TYPE_METHOD_CALL to
817 * create a reply message to.
818 * @error_name: A valid D-Bus error name.
819 * @error_message_format: The D-Bus error message in a printf() format.
820 * @var_args: Arguments for @error_message_format.
822 * Like g_dbus_message_new_method_error() but intended for language bindings.
824 * Returns: (transfer full): A #GDBusMessage. Free with g_object_unref().
830 g_dbus_message_new_method_error_valist (GDBusMessage *method_call_message,
831 const gchar *error_name,
832 const gchar *error_message_format,
836 gchar *error_message;
837 error_message = g_strdup_vprintf (error_message_format, var_args);
838 ret = g_dbus_message_new_method_error_literal (method_call_message,
841 g_free (error_message);
845 /* ---------------------------------------------------------------------------------------------------- */
848 * g_dbus_message_get_byte_order:
849 * @message: A #GDBusMessage.
851 * Gets the byte order of @message.
853 * Returns: The byte order.
855 GDBusMessageByteOrder
856 g_dbus_message_get_byte_order (GDBusMessage *message)
858 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), (GDBusMessageByteOrder) 0);
859 return message->byte_order;
863 * g_dbus_message_set_byte_order:
864 * @message: A #GDBusMessage.
865 * @byte_order: The byte order.
867 * Sets the byte order of @message.
870 g_dbus_message_set_byte_order (GDBusMessage *message,
871 GDBusMessageByteOrder byte_order)
873 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
877 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
881 message->byte_order = byte_order;
884 /* ---------------------------------------------------------------------------------------------------- */
886 /* TODO: need GI annotations to specify that any guchar value goes for the type */
889 * g_dbus_message_get_message_type:
890 * @message: A #GDBusMessage.
892 * Gets the type of @message.
894 * Returns: A 8-bit unsigned integer (typically a value from the #GDBusMessageType enumeration).
899 g_dbus_message_get_message_type (GDBusMessage *message)
901 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), G_DBUS_MESSAGE_TYPE_INVALID);
902 return message->type;
906 * g_dbus_message_set_message_type:
907 * @message: A #GDBusMessage.
908 * @type: A 8-bit unsigned integer (typically a value from the #GDBusMessageType enumeration).
910 * Sets @message to be of @type.
915 g_dbus_message_set_message_type (GDBusMessage *message,
916 GDBusMessageType type)
918 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
919 g_return_if_fail (type >=0 && type < 256);
923 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
927 message->type = type;
930 /* ---------------------------------------------------------------------------------------------------- */
932 /* TODO: need GI annotations to specify that any guchar value goes for flags */
935 * g_dbus_message_get_flags:
936 * @message: A #GDBusMessage.
938 * Gets the flags for @message.
940 * Returns: Flags that are set (typically values from the #GDBusMessageFlags enumeration bitwise ORed together).
945 g_dbus_message_get_flags (GDBusMessage *message)
947 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), G_DBUS_MESSAGE_FLAGS_NONE);
948 return message->flags;
952 * g_dbus_message_set_flags:
953 * @message: A #GDBusMessage.
954 * @flags: Flags for @message that are set (typically values from the #GDBusMessageFlags
955 * enumeration bitwise ORed together).
957 * Sets the flags to set on @message.
962 g_dbus_message_set_flags (GDBusMessage *message,
963 GDBusMessageFlags flags)
965 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
966 g_return_if_fail (flags >=0 && flags < 256);
970 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
974 message->flags = flags;
977 /* ---------------------------------------------------------------------------------------------------- */
980 * g_dbus_message_get_serial:
981 * @message: A #GDBusMessage.
983 * Gets the serial for @message.
985 * Returns: A #guint32.
990 g_dbus_message_get_serial (GDBusMessage *message)
992 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
993 return message->serial;
997 * g_dbus_message_set_serial:
998 * @message: A #GDBusMessage.
999 * @serial: A #guint32.
1001 * Sets the serial for @message.
1006 g_dbus_message_set_serial (GDBusMessage *message,
1009 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1011 if (message->locked)
1013 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
1017 message->serial = serial;
1020 /* ---------------------------------------------------------------------------------------------------- */
1022 /* TODO: need GI annotations to specify that any guchar value goes for header_field */
1025 * g_dbus_message_get_header:
1026 * @message: A #GDBusMessage.
1027 * @header_field: A 8-bit unsigned integer (typically a value from the #GDBusMessageHeaderField enumeration)
1029 * Gets a header field on @message.
1031 * Returns: A #GVariant with the value if the header was found, %NULL
1032 * otherwise. Do not free, it is owned by @message.
1037 g_dbus_message_get_header (GDBusMessage *message,
1038 GDBusMessageHeaderField header_field)
1040 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1041 g_return_val_if_fail (header_field >=0 && header_field < 256, NULL);
1042 return g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
1046 * g_dbus_message_set_header:
1047 * @message: A #GDBusMessage.
1048 * @header_field: A 8-bit unsigned integer (typically a value from the #GDBusMessageHeaderField enumeration)
1049 * @value: (allow-none): A #GVariant to set the header field or %NULL to clear the header field.
1051 * Sets a header field on @message.
1053 * If @value is floating, @message assumes ownership of @value.
1058 g_dbus_message_set_header (GDBusMessage *message,
1059 GDBusMessageHeaderField header_field,
1062 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1063 g_return_if_fail (header_field >=0 && header_field < 256);
1065 if (message->locked)
1067 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
1073 g_hash_table_remove (message->headers, GUINT_TO_POINTER (header_field));
1077 g_hash_table_insert (message->headers, GUINT_TO_POINTER (header_field), g_variant_ref_sink (value));
1082 * g_dbus_message_get_header_fields:
1083 * @message: A #GDBusMessage.
1085 * Gets an array of all header fields on @message that are set.
1087 * Returns: (array zero-terminated=1): An array of header fields
1088 * terminated by %G_DBUS_MESSAGE_HEADER_FIELD_INVALID. Each element
1089 * is a #guchar. Free with g_free().
1094 g_dbus_message_get_header_fields (GDBusMessage *message)
1102 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1104 keys = g_hash_table_get_keys (message->headers);
1105 num_keys = g_list_length (keys);
1106 ret = g_new (guchar, num_keys + 1);
1107 for (l = keys, n = 0; l != NULL; l = l->next, n++)
1108 ret[n] = GPOINTER_TO_UINT (l->data);
1109 g_assert (n == num_keys);
1110 ret[n] = G_DBUS_MESSAGE_HEADER_FIELD_INVALID;
1116 /* ---------------------------------------------------------------------------------------------------- */
1119 * g_dbus_message_get_body:
1120 * @message: A #GDBusMessage.
1122 * Gets the body of a message.
1124 * Returns: A #GVariant or %NULL if the body is empty. Do not free, it is owned by @message.
1129 g_dbus_message_get_body (GDBusMessage *message)
1131 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1132 return message->body;
1136 * g_dbus_message_set_body:
1137 * @message: A #GDBusMessage.
1138 * @body: Either %NULL or a #GVariant that is a tuple.
1140 * Sets the body @message. As a side-effect the
1141 * %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field is set to the
1142 * type string of @body (or cleared if @body is %NULL).
1144 * If @body is floating, @message assumes ownership of @body.
1149 g_dbus_message_set_body (GDBusMessage *message,
1152 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1153 g_return_if_fail ((body == NULL) || g_variant_is_of_type (body, G_VARIANT_TYPE_TUPLE));
1155 if (message->locked)
1157 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
1161 if (message->body != NULL)
1162 g_variant_unref (message->body);
1165 message->body = NULL;
1166 g_dbus_message_set_signature (message, NULL);
1170 const gchar *type_string;
1171 gsize type_string_len;
1174 message->body = g_variant_ref_sink (body);
1176 type_string = g_variant_get_type_string (body);
1177 type_string_len = strlen (type_string);
1178 g_assert (type_string_len >= 2);
1179 signature = g_strndup (type_string + 1, type_string_len - 2);
1180 g_dbus_message_set_signature (message, signature);
1185 /* ---------------------------------------------------------------------------------------------------- */
1189 * g_dbus_message_get_unix_fd_list:
1190 * @message: A #GDBusMessage.
1192 * Gets the UNIX file descriptors associated with @message, if any.
1194 * This method is only available on UNIX.
1196 * Returns: (transfer none):A #GUnixFDList or %NULL if no file descriptors are
1197 * associated. Do not free, this object is owned by @message.
1202 g_dbus_message_get_unix_fd_list (GDBusMessage *message)
1204 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
1205 return message->fd_list;
1209 * g_dbus_message_set_unix_fd_list:
1210 * @message: A #GDBusMessage.
1211 * @fd_list: (allow-none): A #GUnixFDList or %NULL.
1213 * Sets the UNIX file descriptors associated with @message. As a
1214 * side-effect the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header
1215 * field is set to the number of fds in @fd_list (or cleared if
1216 * @fd_list is %NULL).
1218 * This method is only available on UNIX.
1223 g_dbus_message_set_unix_fd_list (GDBusMessage *message,
1224 GUnixFDList *fd_list)
1226 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
1227 g_return_if_fail (fd_list == NULL || G_IS_UNIX_FD_LIST (fd_list));
1229 if (message->locked)
1231 g_warning ("%s: Attempted to modify a locked message", G_STRFUNC);
1235 if (message->fd_list != NULL)
1236 g_object_unref (message->fd_list);
1237 if (fd_list != NULL)
1239 message->fd_list = g_object_ref (fd_list);
1240 g_dbus_message_set_num_unix_fds (message, g_unix_fd_list_get_length (fd_list));
1244 message->fd_list = NULL;
1245 g_dbus_message_set_num_unix_fds (message, 0);
1250 /* ---------------------------------------------------------------------------------------------------- */
1253 validate_headers (GDBusMessage *message,
1258 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
1259 g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
1263 switch (message->type)
1265 case G_DBUS_MESSAGE_TYPE_INVALID:
1266 g_set_error_literal (error,
1268 G_IO_ERROR_INVALID_ARGUMENT,
1269 _("type is INVALID"));
1273 case G_DBUS_MESSAGE_TYPE_METHOD_CALL:
1274 if (g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH) == NULL ||
1275 g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER) == NULL)
1277 g_set_error_literal (error,
1279 G_IO_ERROR_INVALID_ARGUMENT,
1280 _("METHOD_CALL message: PATH or MEMBER header field is missing"));
1285 case G_DBUS_MESSAGE_TYPE_METHOD_RETURN:
1286 if (g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL) == NULL)
1288 g_set_error_literal (error,
1290 G_IO_ERROR_INVALID_ARGUMENT,
1291 _("METHOD_RETURN message: REPLY_SERIAL header field is missing"));
1296 case G_DBUS_MESSAGE_TYPE_ERROR:
1297 if (g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME) == NULL ||
1298 g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL) == NULL)
1300 g_set_error_literal (error,
1302 G_IO_ERROR_INVALID_ARGUMENT,
1303 _("ERROR message: REPLY_SERIAL or ERROR_NAME header field is missing"));
1308 case G_DBUS_MESSAGE_TYPE_SIGNAL:
1309 if (g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH) == NULL ||
1310 g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE) == NULL ||
1311 g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER) == NULL)
1313 g_set_error_literal (error,
1315 G_IO_ERROR_INVALID_ARGUMENT,
1316 _("SIGNAL message: PATH, INTERFACE or MEMBER header field is missing"));
1319 if (g_strcmp0 (g_dbus_message_get_path (message), "/org/freedesktop/DBus/Local") == 0)
1321 g_set_error_literal (error,
1323 G_IO_ERROR_INVALID_ARGUMENT,
1324 _("SIGNAL message: The PATH header field is using the reserved value /org/freedesktop/DBus/Local"));
1327 if (g_strcmp0 (g_dbus_message_get_interface (message), "org.freedesktop.DBus.Local") == 0)
1329 g_set_error_literal (error,
1331 G_IO_ERROR_INVALID_ARGUMENT,
1332 _("SIGNAL message: The INTERFACE header field is using the reserved value org.freedesktop.DBus.Local"));
1338 /* hitherto unknown type - nothing to check */
1345 g_assert (ret || (error == NULL || *error != NULL));
1349 /* ---------------------------------------------------------------------------------------------------- */
1352 ensure_input_padding (GMemoryBuffer *buf,
1357 gsize wanted_offset;
1360 wanted_offset = ((offset + padding_size - 1) / padding_size) * padding_size;
1361 buf->pos = wanted_offset;
1365 static const gchar *
1366 read_string (GMemoryBuffer *mbuf,
1371 const gchar *end_valid;
1373 if (mbuf->pos + len >= mbuf->valid_len || mbuf->pos + len < mbuf->pos)
1375 mbuf->pos = mbuf->valid_len;
1376 /* G_GSIZE_FORMAT doesn't work with gettext, so we use %lu */
1379 G_IO_ERROR_INVALID_ARGUMENT,
1380 g_dngettext (GETTEXT_PACKAGE,
1381 "Wanted to read %lu byte but only got %lu",
1382 "Wanted to read %lu bytes but only got %lu",
1385 (gulong)(mbuf->valid_len - mbuf->pos));
1386 mbuf->pos = mbuf->valid_len;
1390 if (mbuf->data[mbuf->pos + len] != '\0')
1392 str = g_strndup (mbuf->data + mbuf->pos, len);
1395 G_IO_ERROR_INVALID_ARGUMENT,
1396 _("Expected NUL byte after the string '%s' but found byte %d"),
1397 str, mbuf->data[mbuf->pos + len]);
1399 mbuf->pos += len + 1;
1403 str = mbuf->data + mbuf->pos;
1404 mbuf->pos += len + 1;
1406 if (!g_utf8_validate (str, -1, &end_valid))
1410 offset = (gint) (end_valid - str);
1411 valid_str = g_strndup (str, offset);
1414 G_IO_ERROR_INVALID_ARGUMENT,
1415 _("Expected valid UTF-8 string but found invalid bytes at byte offset %d (length of string is %d). "
1416 "The valid UTF-8 string up until that point was '%s'"),
1427 /* if just_align==TRUE, don't read a value, just align the input stream wrt padding */
1429 /* returns a non-floating GVariant! */
1431 parse_value_from_blob (GMemoryBuffer *buf,
1432 const GVariantType *type,
1433 gboolean just_align,
1438 GError *local_error;
1440 const gchar *type_string;
1442 type_string = g_variant_type_peek_string (type);
1444 #ifdef DEBUG_SERIALIZER
1447 s = g_variant_type_dup_string (type);
1448 g_print ("%*s%s type %s from offset 0x%04x",
1450 just_align ? "Aligning" : "Reading",
1452 (gint) g_seekable_tell (G_SEEKABLE (buf)));
1455 #endif /* DEBUG_SERIALIZER */
1461 switch (type_string[0])
1463 case 'b': /* G_VARIANT_TYPE_BOOLEAN */
1464 if (!ensure_input_padding (buf, 4, &local_error))
1469 v = g_memory_buffer_read_uint32 (buf, &local_error);
1470 if (local_error != NULL)
1472 ret = g_variant_new_boolean (v);
1476 case 'y': /* G_VARIANT_TYPE_BYTE */
1480 v = g_memory_buffer_read_byte (buf, &local_error);
1481 if (local_error != NULL)
1483 ret = g_variant_new_byte (v);
1487 case 'n': /* G_VARIANT_TYPE_INT16 */
1488 if (!ensure_input_padding (buf, 2, &local_error))
1493 v = g_memory_buffer_read_int16 (buf, &local_error);
1494 if (local_error != NULL)
1496 ret = g_variant_new_int16 (v);
1500 case 'q': /* G_VARIANT_TYPE_UINT16 */
1501 if (!ensure_input_padding (buf, 2, &local_error))
1506 v = g_memory_buffer_read_uint16 (buf, &local_error);
1507 if (local_error != NULL)
1509 ret = g_variant_new_uint16 (v);
1513 case 'i': /* G_VARIANT_TYPE_INT32 */
1514 if (!ensure_input_padding (buf, 4, &local_error))
1519 v = g_memory_buffer_read_int32 (buf, &local_error);
1520 if (local_error != NULL)
1522 ret = g_variant_new_int32 (v);
1526 case 'u': /* G_VARIANT_TYPE_UINT32 */
1527 if (!ensure_input_padding (buf, 4, &local_error))
1532 v = g_memory_buffer_read_uint32 (buf, &local_error);
1533 if (local_error != NULL)
1535 ret = g_variant_new_uint32 (v);
1539 case 'x': /* G_VARIANT_TYPE_INT64 */
1540 if (!ensure_input_padding (buf, 8, &local_error))
1545 v = g_memory_buffer_read_int64 (buf, &local_error);
1546 if (local_error != NULL)
1548 ret = g_variant_new_int64 (v);
1552 case 't': /* G_VARIANT_TYPE_UINT64 */
1553 if (!ensure_input_padding (buf, 8, &local_error))
1558 v = g_memory_buffer_read_uint64 (buf, &local_error);
1559 if (local_error != NULL)
1561 ret = g_variant_new_uint64 (v);
1565 case 'd': /* G_VARIANT_TYPE_DOUBLE */
1566 if (!ensure_input_padding (buf, 8, &local_error))
1574 G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
1575 u.v_uint64 = g_memory_buffer_read_uint64 (buf, &local_error);
1576 if (local_error != NULL)
1578 ret = g_variant_new_double (u.v_double);
1582 case 's': /* G_VARIANT_TYPE_STRING */
1583 if (!ensure_input_padding (buf, 4, &local_error))
1589 len = g_memory_buffer_read_uint32 (buf, &local_error);
1590 if (local_error != NULL)
1592 v = read_string (buf, (gsize) len, &local_error);
1595 ret = g_variant_new_string (v);
1599 case 'o': /* G_VARIANT_TYPE_OBJECT_PATH */
1600 if (!ensure_input_padding (buf, 4, &local_error))
1606 len = g_memory_buffer_read_uint32 (buf, &local_error);
1607 if (local_error != NULL)
1609 v = read_string (buf, (gsize) len, &local_error);
1612 if (!g_variant_is_object_path (v))
1614 g_set_error (&local_error,
1616 G_IO_ERROR_INVALID_ARGUMENT,
1617 _("Parsed value '%s' is not a valid D-Bus object path"),
1621 ret = g_variant_new_object_path (v);
1625 case 'g': /* G_VARIANT_TYPE_SIGNATURE */
1630 len = g_memory_buffer_read_byte (buf, &local_error);
1631 if (local_error != NULL)
1633 v = read_string (buf, (gsize) len, &local_error);
1636 if (!g_variant_is_signature (v))
1638 g_set_error (&local_error,
1640 G_IO_ERROR_INVALID_ARGUMENT,
1641 _("Parsed value '%s' is not a valid D-Bus signature"),
1645 ret = g_variant_new_signature (v);
1649 case 'h': /* G_VARIANT_TYPE_HANDLE */
1650 if (!ensure_input_padding (buf, 4, &local_error))
1655 v = g_memory_buffer_read_int32 (buf, &local_error);
1656 if (local_error != NULL)
1658 ret = g_variant_new_handle (v);
1662 case 'a': /* G_VARIANT_TYPE_ARRAY */
1663 if (!ensure_input_padding (buf, 4, &local_error))
1666 /* If we are only aligning for this array type, it is the child type of
1667 * another array, which is empty. So, we do not need to add padding for
1668 * this nonexistent array's elements: we only need to align for this
1669 * array itself (4 bytes). See
1670 * <https://bugzilla.gnome.org/show_bug.cgi?id=673612>.
1677 const GVariantType *element_type;
1678 GVariantBuilder builder;
1680 array_len = g_memory_buffer_read_uint32 (buf, &local_error);
1681 if (local_error != NULL)
1685 #ifdef DEBUG_SERIALIZER
1686 g_print (": array spans 0x%04x bytes\n", array_len);
1687 #endif /* DEBUG_SERIALIZER */
1689 if (array_len > (2<<26))
1691 /* G_GUINT32_FORMAT doesn't work with gettext, so use u */
1692 g_set_error (&local_error,
1694 G_IO_ERROR_INVALID_ARGUMENT,
1695 g_dngettext (GETTEXT_PACKAGE,
1696 "Encountered array of length %u byte. Maximum length is 2<<26 bytes (64 MiB).",
1697 "Encountered array of length %u bytes. Maximum length is 2<<26 bytes (64 MiB).",
1703 g_variant_builder_init (&builder, type);
1704 element_type = g_variant_type_element (type);
1709 item = parse_value_from_blob (buf,
1714 g_assert (item == NULL);
1718 /* TODO: optimize array of primitive types */
1720 target = offset + array_len;
1721 while (offset < target)
1724 item = parse_value_from_blob (buf,
1731 g_variant_builder_clear (&builder);
1734 g_variant_builder_add_value (&builder, item);
1735 g_variant_unref (item);
1740 ret = g_variant_builder_end (&builder);
1745 if (g_variant_type_is_dict_entry (type))
1747 const GVariantType *key_type;
1748 const GVariantType *value_type;
1752 if (!ensure_input_padding (buf, 8, &local_error))
1756 #ifdef DEBUG_SERIALIZER
1758 #endif /* DEBUG_SERIALIZER */
1762 key_type = g_variant_type_key (type);
1763 key = parse_value_from_blob (buf,
1770 value_type = g_variant_type_value (type);
1771 value = parse_value_from_blob (buf,
1778 g_variant_unref (key);
1781 ret = g_variant_new_dict_entry (key, value);
1782 g_variant_unref (key);
1783 g_variant_unref (value);
1786 else if (g_variant_type_is_tuple (type))
1788 if (!ensure_input_padding (buf, 8, &local_error))
1792 #ifdef DEBUG_SERIALIZER
1794 #endif /* DEBUG_SERIALIZER */
1798 const GVariantType *element_type;
1799 GVariantBuilder builder;
1801 g_variant_builder_init (&builder, type);
1802 element_type = g_variant_type_first (type);
1803 while (element_type != NULL)
1806 item = parse_value_from_blob (buf,
1813 g_variant_builder_clear (&builder);
1816 g_variant_builder_add_value (&builder, item);
1817 g_variant_unref (item);
1819 element_type = g_variant_type_next (element_type);
1821 ret = g_variant_builder_end (&builder);
1824 else if (g_variant_type_is_variant (type))
1827 #ifdef DEBUG_SERIALIZER
1829 #endif /* DEBUG_SERIALIZER */
1835 GVariantType *variant_type;
1838 siglen = g_memory_buffer_read_byte (buf, &local_error);
1839 if (local_error != NULL)
1841 sig = read_string (buf, (gsize) siglen, &local_error);
1844 if (!g_variant_is_signature (sig))
1846 g_set_error (&local_error,
1848 G_IO_ERROR_INVALID_ARGUMENT,
1849 _("Parsed value '%s' for variant is not a valid D-Bus signature"),
1853 variant_type = g_variant_type_new (sig);
1854 value = parse_value_from_blob (buf,
1859 g_variant_type_free (variant_type);
1862 ret = g_variant_new_variant (value);
1863 g_variant_unref (value);
1869 s = g_variant_type_dup_string (type);
1870 g_set_error (&local_error,
1872 G_IO_ERROR_INVALID_ARGUMENT,
1873 _("Error deserializing GVariant with type string '%s' from the D-Bus wire format"),
1881 g_assert ((just_align && ret == NULL) || (!just_align && ret != NULL));
1883 #ifdef DEBUG_SERIALIZER
1889 if (g_variant_type_equal (type, G_VARIANT_TYPE_BYTE))
1891 s = g_strdup_printf ("0x%02x '%c'", g_variant_get_byte (ret), g_variant_get_byte (ret));
1895 s = g_variant_print (ret, FALSE);
1897 g_print (": %s\n", s);
1902 is_leaf = is_leaf; /* To avoid -Wunused-but-set-variable */
1903 #endif /* DEBUG_SERIALIZER */
1905 /* sink the reference */
1908 g_assert (g_variant_is_floating (ret));
1909 g_variant_ref_sink (ret);
1914 #ifdef DEBUG_SERIALIZER
1916 "%*sFAILURE: %s (%s, %d)\n",
1918 local_error->message,
1919 g_quark_to_string (local_error->domain),
1921 #endif /* DEBUG_SERIALIZER */
1922 g_propagate_error (error, local_error);
1926 /* ---------------------------------------------------------------------------------------------------- */
1928 /* message_header must be at least 16 bytes */
1931 * g_dbus_message_bytes_needed:
1932 * @blob: (array length=blob_len) (element-type guint8): A blob represent a binary D-Bus message.
1933 * @blob_len: The length of @blob (must be at least 16).
1934 * @error: Return location for error or %NULL.
1936 * Utility function to calculate how many bytes are needed to
1937 * completely deserialize the D-Bus message stored at @blob.
1939 * Returns: Number of bytes needed or -1 if @error is set (e.g. if
1940 * @blob contains invalid data or not enough data is available to
1941 * determine the size).
1946 g_dbus_message_bytes_needed (guchar *blob,
1954 g_return_val_if_fail (blob != NULL, -1);
1955 g_return_val_if_fail (error == NULL || *error == NULL, -1);
1956 g_return_val_if_fail (blob_len >= 16, -1);
1960 /* core header (12 bytes) + ARRAY of STRUCT of (BYTE,VARIANT) */
1961 ret = 12 + 4 + GUINT32_FROM_LE (((guint32 *) blob)[3]);
1962 /* round up so it's a multiple of 8 */
1963 ret = 8 * ((ret + 7)/8);
1964 /* finally add the body size */
1965 ret += GUINT32_FROM_LE (((guint32 *) blob)[1]);
1967 else if (blob[0] == 'B')
1969 /* core header (12 bytes) + ARRAY of STRUCT of (BYTE,VARIANT) */
1970 ret = 12 + 4 + GUINT32_FROM_BE (((guint32 *) blob)[3]);
1971 /* round up so it's a multiple of 8 */
1972 ret = 8 * ((ret + 7)/8);
1973 /* finally add the body size */
1974 ret += GUINT32_FROM_BE (((guint32 *) blob)[1]);
1980 G_IO_ERROR_INVALID_ARGUMENT,
1981 "Unable to determine message blob length - given blob is malformed");
1988 G_IO_ERROR_INVALID_ARGUMENT,
1989 "Blob indicates that message exceeds maximum message length (128MiB)");
1996 /* ---------------------------------------------------------------------------------------------------- */
1999 * g_dbus_message_new_from_blob:
2000 * @blob: (array length=blob_len) (element-type guint8): A blob represent a binary D-Bus message.
2001 * @blob_len: The length of @blob.
2002 * @capabilities: A #GDBusCapabilityFlags describing what protocol features are supported.
2003 * @error: Return location for error or %NULL.
2005 * Creates a new #GDBusMessage from the data stored at @blob. The byte
2006 * order that the message was in can be retrieved using
2007 * g_dbus_message_get_byte_order().
2009 * Returns: A new #GDBusMessage or %NULL if @error is set. Free with
2015 g_dbus_message_new_from_blob (guchar *blob,
2017 GDBusCapabilityFlags capabilities,
2022 GDBusMessage *message;
2024 guchar major_protocol_version;
2025 guint32 message_body_len;
2029 GVariant *signature;
2031 /* TODO: check against @capabilities */
2035 g_return_val_if_fail (blob != NULL, NULL);
2036 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2037 g_return_val_if_fail (blob_len >= 12, NULL);
2039 message = g_dbus_message_new ();
2041 memset (&mbuf, 0, sizeof (mbuf));
2042 mbuf.data = (gchar *)blob;
2043 mbuf.len = mbuf.valid_len = blob_len;
2045 endianness = g_memory_buffer_read_byte (&mbuf, NULL);
2049 mbuf.byte_order = G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN;
2050 message->byte_order = G_DBUS_MESSAGE_BYTE_ORDER_LITTLE_ENDIAN;
2053 mbuf.byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
2054 message->byte_order = G_DBUS_MESSAGE_BYTE_ORDER_BIG_ENDIAN;
2059 G_IO_ERROR_INVALID_ARGUMENT,
2060 _("Invalid endianness value. Expected 0x6c ('l') or 0x42 ('B') but found value 0x%02x"),
2065 message->type = g_memory_buffer_read_byte (&mbuf, NULL);
2066 message->flags = g_memory_buffer_read_byte (&mbuf, NULL);
2067 major_protocol_version = g_memory_buffer_read_byte (&mbuf, NULL);
2068 if (major_protocol_version != 1)
2072 G_IO_ERROR_INVALID_ARGUMENT,
2073 _("Invalid major protocol version. Expected 1 but found %d"),
2074 major_protocol_version);
2077 message_body_len = g_memory_buffer_read_uint32 (&mbuf, NULL);
2078 message->serial = g_memory_buffer_read_uint32 (&mbuf, NULL);
2080 #ifdef DEBUG_SERIALIZER
2081 g_print ("Parsing blob (blob_len = 0x%04x bytes)\n", (gint) blob_len);
2084 s = _g_dbus_hexdump ((const gchar *) blob, blob_len, 2);
2085 g_print ("%s\n", s);
2088 #endif /* DEBUG_SERIALIZER */
2090 #ifdef DEBUG_SERIALIZER
2091 g_print ("Parsing headers (blob_len = 0x%04x bytes)\n", (gint) blob_len);
2092 #endif /* DEBUG_SERIALIZER */
2093 headers = parse_value_from_blob (&mbuf,
2094 G_VARIANT_TYPE ("a{yv}"),
2098 if (headers == NULL)
2100 g_variant_iter_init (&iter, headers);
2101 while ((item = g_variant_iter_next_value (&iter)) != NULL)
2103 guchar header_field;
2105 g_variant_get (item,
2109 g_dbus_message_set_header (message, header_field, value);
2110 g_variant_unref (value);
2111 g_variant_unref (item);
2113 g_variant_unref (headers);
2115 signature = g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
2116 if (signature != NULL)
2118 const gchar *signature_str;
2119 gsize signature_str_len;
2121 signature_str = g_variant_get_string (signature, &signature_str_len);
2123 /* signature but no body */
2124 if (message_body_len == 0 && signature_str_len > 0)
2128 G_IO_ERROR_INVALID_ARGUMENT,
2129 _("Signature header with signature '%s' found but message body is empty"),
2133 else if (signature_str_len > 0)
2135 GVariantType *variant_type;
2136 gchar *tupled_signature_str;
2138 if (!g_variant_is_signature (signature_str))
2142 G_IO_ERROR_INVALID_ARGUMENT,
2143 _("Parsed value '%s' is not a valid D-Bus signature (for body)"),
2147 tupled_signature_str = g_strdup_printf ("(%s)", signature_str);
2148 variant_type = g_variant_type_new (tupled_signature_str);
2149 g_free (tupled_signature_str);
2150 #ifdef DEBUG_SERIALIZER
2151 g_print ("Parsing body (blob_len = 0x%04x bytes)\n", (gint) blob_len);
2152 #endif /* DEBUG_SERIALIZER */
2153 message->body = parse_value_from_blob (&mbuf,
2158 g_variant_type_free (variant_type);
2159 if (message->body == NULL)
2165 /* no signature, this is only OK if the body is empty */
2166 if (message_body_len != 0)
2168 /* G_GUINT32_FORMAT doesn't work with gettext, just use %u */
2171 G_IO_ERROR_INVALID_ARGUMENT,
2172 g_dngettext (GETTEXT_PACKAGE,
2173 "No signature header in message but the message body is %u byte",
2174 "No signature header in message but the message body is %u bytes",
2181 if (!validate_headers (message, error))
2183 g_prefix_error (error, _("Cannot deserialize message: "));
2196 if (message != NULL)
2197 g_object_unref (message);
2202 /* ---------------------------------------------------------------------------------------------------- */
2205 ensure_output_padding (GMemoryBuffer *mbuf,
2209 gsize wanted_offset;
2210 gsize padding_needed;
2214 wanted_offset = ((offset + padding_size - 1) / padding_size) * padding_size;
2215 padding_needed = wanted_offset - offset;
2217 for (n = 0; n < padding_needed; n++)
2218 g_memory_buffer_put_byte (mbuf, '\0');
2220 return padding_needed;
2223 /* note that value can be NULL for e.g. empty arrays - type is never NULL */
2225 append_value_to_blob (GVariant *value,
2226 const GVariantType *type,
2227 GMemoryBuffer *mbuf,
2228 gsize *out_padding_added,
2231 gsize padding_added;
2232 const gchar *type_string;
2234 type_string = g_variant_type_peek_string (type);
2238 switch (type_string[0])
2240 case 'b': /* G_VARIANT_TYPE_BOOLEAN */
2241 padding_added = ensure_output_padding (mbuf, 4);
2244 gboolean v = g_variant_get_boolean (value);
2245 g_memory_buffer_put_uint32 (mbuf, v);
2249 case 'y': /* G_VARIANT_TYPE_BYTE */
2252 guint8 v = g_variant_get_byte (value);
2253 g_memory_buffer_put_byte (mbuf, v);
2257 case 'n': /* G_VARIANT_TYPE_INT16 */
2258 padding_added = ensure_output_padding (mbuf, 2);
2261 gint16 v = g_variant_get_int16 (value);
2262 g_memory_buffer_put_int16 (mbuf, v);
2266 case 'q': /* G_VARIANT_TYPE_UINT16 */
2267 padding_added = ensure_output_padding (mbuf, 2);
2270 guint16 v = g_variant_get_uint16 (value);
2271 g_memory_buffer_put_uint16 (mbuf, v);
2275 case 'i': /* G_VARIANT_TYPE_INT32 */
2276 padding_added = ensure_output_padding (mbuf, 4);
2279 gint32 v = g_variant_get_int32 (value);
2280 g_memory_buffer_put_int32 (mbuf, v);
2284 case 'u': /* G_VARIANT_TYPE_UINT32 */
2285 padding_added = ensure_output_padding (mbuf, 4);
2288 guint32 v = g_variant_get_uint32 (value);
2289 g_memory_buffer_put_uint32 (mbuf, v);
2293 case 'x': /* G_VARIANT_TYPE_INT64 */
2294 padding_added = ensure_output_padding (mbuf, 8);
2297 gint64 v = g_variant_get_int64 (value);
2298 g_memory_buffer_put_int64 (mbuf, v);
2302 case 't': /* G_VARIANT_TYPE_UINT64 */
2303 padding_added = ensure_output_padding (mbuf, 8);
2306 guint64 v = g_variant_get_uint64 (value);
2307 g_memory_buffer_put_uint64 (mbuf, v);
2311 case 'd': /* G_VARIANT_TYPE_DOUBLE */
2312 padding_added = ensure_output_padding (mbuf, 8);
2319 G_STATIC_ASSERT (sizeof (gdouble) == sizeof (guint64));
2320 u.v_double = g_variant_get_double (value);
2321 g_memory_buffer_put_uint64 (mbuf, u.v_uint64);
2325 case 's': /* G_VARIANT_TYPE_STRING */
2326 padding_added = ensure_output_padding (mbuf, 4);
2332 v = g_variant_get_string (value, &len);
2333 g_assert (g_utf8_validate (v, -1, &end) && (end == v + len));
2334 g_memory_buffer_put_uint32 (mbuf, len);
2335 g_memory_buffer_put_string (mbuf, v);
2336 g_memory_buffer_put_byte (mbuf, '\0');
2340 case 'o': /* G_VARIANT_TYPE_OBJECT_PATH */
2341 padding_added = ensure_output_padding (mbuf, 4);
2345 const gchar *v = g_variant_get_string (value, &len);
2346 g_assert (g_variant_is_object_path (v));
2347 g_memory_buffer_put_uint32 (mbuf, len);
2348 g_memory_buffer_put_string (mbuf, v);
2349 g_memory_buffer_put_byte (mbuf, '\0');
2353 case 'g': /* G_VARIANT_TYPE_SIGNATURE */
2357 const gchar *v = g_variant_get_string (value, &len);
2358 g_assert (g_variant_is_signature (v));
2359 g_memory_buffer_put_byte (mbuf, len);
2360 g_memory_buffer_put_string (mbuf, v);
2361 g_memory_buffer_put_byte (mbuf, '\0');
2365 case 'h': /* G_VARIANT_TYPE_HANDLE */
2366 padding_added = ensure_output_padding (mbuf, 4);
2369 gint32 v = g_variant_get_handle (value);
2370 g_memory_buffer_put_int32 (mbuf, v);
2374 case 'a': /* G_VARIANT_TYPE_ARRAY */
2378 goffset array_len_offset;
2379 goffset array_payload_begin_offset;
2383 padding_added = ensure_output_padding (mbuf, 4);
2386 /* array length - will be filled in later */
2387 array_len_offset = mbuf->valid_len;
2388 g_memory_buffer_put_uint32 (mbuf, 0xF00DFACE);
2390 /* From the D-Bus spec:
2392 * "A UINT32 giving the length of the array data in bytes,
2393 * followed by alignment padding to the alignment boundary of
2394 * the array element type, followed by each array element. The
2395 * array length is from the end of the alignment padding to
2396 * the end of the last element, i.e. it does not include the
2397 * padding after the length, or any padding after the last
2400 * Thus, we need to count how much padding the first element
2401 * contributes and subtract that from the array length.
2403 array_payload_begin_offset = mbuf->valid_len;
2405 if (g_variant_n_children (value) == 0)
2407 gsize padding_added_for_item;
2408 if (!append_value_to_blob (NULL,
2409 g_variant_type_element (type),
2411 &padding_added_for_item,
2414 array_payload_begin_offset += padding_added_for_item;
2420 g_variant_iter_init (&iter, value);
2421 while ((item = g_variant_iter_next_value (&iter)) != NULL)
2423 gsize padding_added_for_item;
2424 if (!append_value_to_blob (item,
2425 g_variant_get_type (item),
2427 &padding_added_for_item,
2430 g_variant_unref (item);
2433 g_variant_unref (item);
2436 array_payload_begin_offset += padding_added_for_item;
2442 cur_offset = mbuf->valid_len;
2443 array_len = cur_offset - array_payload_begin_offset;
2444 mbuf->pos = array_len_offset;
2446 g_memory_buffer_put_uint32 (mbuf, array_len);
2447 mbuf->pos = cur_offset;
2453 if (g_variant_type_is_dict_entry (type) || g_variant_type_is_tuple (type))
2455 padding_added = ensure_output_padding (mbuf, 8);
2460 g_variant_iter_init (&iter, value);
2461 while ((item = g_variant_iter_next_value (&iter)) != NULL)
2463 if (!append_value_to_blob (item,
2464 g_variant_get_type (item),
2469 g_variant_unref (item);
2472 g_variant_unref (item);
2476 else if (g_variant_type_is_variant (type))
2481 const gchar *signature;
2482 child = g_variant_get_child_value (value, 0);
2483 signature = g_variant_get_type_string (child);
2484 g_memory_buffer_put_byte (mbuf, strlen (signature));
2485 g_memory_buffer_put_string (mbuf, signature);
2486 g_memory_buffer_put_byte (mbuf, '\0');
2487 if (!append_value_to_blob (child,
2488 g_variant_get_type (child),
2493 g_variant_unref (child);
2496 g_variant_unref (child);
2503 G_IO_ERROR_INVALID_ARGUMENT,
2504 _("Error serializing GVariant with type string '%s' to the D-Bus wire format"),
2505 g_variant_get_type_string (value));
2511 if (out_padding_added != NULL)
2512 *out_padding_added = padding_added;
2521 append_body_to_blob (GVariant *value,
2522 GMemoryBuffer *mbuf,
2528 if (!g_variant_is_of_type (value, G_VARIANT_TYPE_TUPLE))
2532 G_IO_ERROR_INVALID_ARGUMENT,
2533 "Expected a tuple for the body of the GDBusMessage.");
2537 g_variant_iter_init (&iter, value);
2538 while ((item = g_variant_iter_next_value (&iter)) != NULL)
2540 if (!append_value_to_blob (item,
2541 g_variant_get_type (item),
2546 g_variant_unref (item);
2549 g_variant_unref (item);
2557 /* ---------------------------------------------------------------------------------------------------- */
2560 * g_dbus_message_to_blob:
2561 * @message: A #GDBusMessage.
2562 * @out_size: Return location for size of generated blob.
2563 * @capabilities: A #GDBusCapabilityFlags describing what protocol features are supported.
2564 * @error: Return location for error.
2566 * Serializes @message to a blob. The byte order returned by
2567 * g_dbus_message_get_byte_order() will be used.
2569 * Returns: (array length=out_size) (transfer full): A pointer to a
2570 * valid binary D-Bus message of @out_size bytes generated by @message
2571 * or %NULL if @error is set. Free with g_free().
2576 g_dbus_message_to_blob (GDBusMessage *message,
2578 GDBusCapabilityFlags capabilities,
2584 goffset body_len_offset;
2585 goffset body_start_offset;
2587 GVariant *header_fields;
2588 GVariantBuilder builder;
2589 GHashTableIter hash_iter;
2591 GVariant *header_value;
2592 GVariant *signature;
2593 const gchar *signature_str;
2594 gint num_fds_in_message;
2595 gint num_fds_according_to_header;
2597 /* TODO: check against @capabilities */
2601 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2602 g_return_val_if_fail (out_size != NULL, NULL);
2603 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
2605 memset (&mbuf, 0, sizeof (mbuf));
2606 mbuf.len = MIN_ARRAY_SIZE;
2607 mbuf.data = g_malloc (mbuf.len);
2609 mbuf.byte_order = G_DATA_STREAM_BYTE_ORDER_HOST_ENDIAN;
2610 switch (message->byte_order)
2612 case G_DBUS_MESSAGE_BYTE_ORDER_BIG_ENDIAN:
2613 mbuf.byte_order = G_DATA_STREAM_BYTE_ORDER_BIG_ENDIAN;
2615 case G_DBUS_MESSAGE_BYTE_ORDER_LITTLE_ENDIAN:
2616 mbuf.byte_order = G_DATA_STREAM_BYTE_ORDER_LITTLE_ENDIAN;
2621 g_memory_buffer_put_byte (&mbuf, (guchar) message->byte_order);
2622 g_memory_buffer_put_byte (&mbuf, message->type);
2623 g_memory_buffer_put_byte (&mbuf, message->flags);
2624 g_memory_buffer_put_byte (&mbuf, 1); /* major protocol version */
2625 body_len_offset = mbuf.valid_len;
2626 /* body length - will be filled in later */
2627 g_memory_buffer_put_uint32 (&mbuf, 0xF00DFACE);
2628 g_memory_buffer_put_uint32 (&mbuf, message->serial);
2630 num_fds_in_message = 0;
2632 if (message->fd_list != NULL)
2633 num_fds_in_message = g_unix_fd_list_get_length (message->fd_list);
2635 num_fds_according_to_header = g_dbus_message_get_num_unix_fds (message);
2636 if (num_fds_in_message != num_fds_according_to_header)
2640 G_IO_ERROR_INVALID_ARGUMENT,
2641 _("Message has %d file descriptors but the header field indicates %d file descriptors"),
2643 num_fds_according_to_header);
2647 if (!validate_headers (message, error))
2649 g_prefix_error (error, _("Cannot serialize message: "));
2653 g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{yv}"));
2654 g_hash_table_iter_init (&hash_iter, message->headers);
2655 while (g_hash_table_iter_next (&hash_iter, &key, (gpointer) &header_value))
2657 g_variant_builder_add (&builder,
2659 (guchar) GPOINTER_TO_UINT (key),
2662 header_fields = g_variant_builder_end (&builder);
2664 if (!append_value_to_blob (header_fields,
2665 g_variant_get_type (header_fields),
2670 g_variant_unref (header_fields);
2673 g_variant_unref (header_fields);
2675 /* header size must be a multiple of 8 */
2676 ensure_output_padding (&mbuf, 8);
2678 body_start_offset = mbuf.valid_len;
2680 signature = g_dbus_message_get_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
2681 signature_str = NULL;
2682 if (signature != NULL)
2683 signature_str = g_variant_get_string (signature, NULL);
2684 if (message->body != NULL)
2686 gchar *tupled_signature_str;
2687 tupled_signature_str = g_strdup_printf ("(%s)", signature_str);
2688 if (signature == NULL)
2692 G_IO_ERROR_INVALID_ARGUMENT,
2693 _("Message body has signature '%s' but there is no signature header"),
2695 g_free (tupled_signature_str);
2698 else if (g_strcmp0 (tupled_signature_str, g_variant_get_type_string (message->body)) != 0)
2702 G_IO_ERROR_INVALID_ARGUMENT,
2703 _("Message body has type signature '%s' but signature in the header field is '%s'"),
2704 tupled_signature_str, g_variant_get_type_string (message->body));
2705 g_free (tupled_signature_str);
2708 g_free (tupled_signature_str);
2709 if (!append_body_to_blob (message->body, &mbuf, error))
2714 if (signature != NULL && strlen (signature_str) > 0)
2718 G_IO_ERROR_INVALID_ARGUMENT,
2719 _("Message body is empty but signature in the header field is '(%s)'"),
2725 /* OK, we're done writing the message - set the body length */
2726 size = mbuf.valid_len;
2727 body_size = size - body_start_offset;
2729 mbuf.pos = body_len_offset;
2731 g_memory_buffer_put_uint32 (&mbuf, body_size);
2734 ret = (guchar *)mbuf.data;
2740 /* ---------------------------------------------------------------------------------------------------- */
2743 get_uint32_header (GDBusMessage *message,
2744 GDBusMessageHeaderField header_field)
2750 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2751 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_UINT32))
2752 ret = g_variant_get_uint32 (value);
2757 static const gchar *
2758 get_string_header (GDBusMessage *message,
2759 GDBusMessageHeaderField header_field)
2765 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2766 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_STRING))
2767 ret = g_variant_get_string (value, NULL);
2772 static const gchar *
2773 get_object_path_header (GDBusMessage *message,
2774 GDBusMessageHeaderField header_field)
2780 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2781 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_OBJECT_PATH))
2782 ret = g_variant_get_string (value, NULL);
2787 static const gchar *
2788 get_signature_header (GDBusMessage *message,
2789 GDBusMessageHeaderField header_field)
2795 value = g_hash_table_lookup (message->headers, GUINT_TO_POINTER (header_field));
2796 if (value != NULL && g_variant_is_of_type (value, G_VARIANT_TYPE_SIGNATURE))
2797 ret = g_variant_get_string (value, NULL);
2802 /* ---------------------------------------------------------------------------------------------------- */
2805 set_uint32_header (GDBusMessage *message,
2806 GDBusMessageHeaderField header_field,
2809 g_dbus_message_set_header (message,
2811 g_variant_new_uint32 (value));
2815 set_string_header (GDBusMessage *message,
2816 GDBusMessageHeaderField header_field,
2819 g_dbus_message_set_header (message,
2821 value == NULL ? NULL : g_variant_new_string (value));
2825 set_object_path_header (GDBusMessage *message,
2826 GDBusMessageHeaderField header_field,
2829 g_dbus_message_set_header (message,
2831 value == NULL ? NULL : g_variant_new_object_path (value));
2835 set_signature_header (GDBusMessage *message,
2836 GDBusMessageHeaderField header_field,
2839 g_dbus_message_set_header (message,
2841 value == NULL ? NULL : g_variant_new_signature (value));
2844 /* ---------------------------------------------------------------------------------------------------- */
2847 * g_dbus_message_get_reply_serial:
2848 * @message: A #GDBusMessage.
2850 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL header field.
2852 * Returns: The value.
2857 g_dbus_message_get_reply_serial (GDBusMessage *message)
2859 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
2860 return get_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL);
2864 * g_dbus_message_set_reply_serial:
2865 * @message: A #GDBusMessage.
2866 * @value: The value to set.
2868 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL header field.
2873 g_dbus_message_set_reply_serial (GDBusMessage *message,
2876 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2877 set_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_REPLY_SERIAL, value);
2880 /* ---------------------------------------------------------------------------------------------------- */
2883 * g_dbus_message_get_interface:
2884 * @message: A #GDBusMessage.
2886 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE header field.
2888 * Returns: The value.
2893 g_dbus_message_get_interface (GDBusMessage *message)
2895 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2896 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE);
2900 * g_dbus_message_set_interface:
2901 * @message: A #GDBusMessage.
2902 * @value: The value to set.
2904 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE header field.
2909 g_dbus_message_set_interface (GDBusMessage *message,
2912 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2913 g_return_if_fail (value == NULL || g_dbus_is_interface_name (value));
2914 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_INTERFACE, value);
2917 /* ---------------------------------------------------------------------------------------------------- */
2920 * g_dbus_message_get_member:
2921 * @message: A #GDBusMessage.
2923 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_MEMBER header field.
2925 * Returns: The value.
2930 g_dbus_message_get_member (GDBusMessage *message)
2932 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2933 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER);
2937 * g_dbus_message_set_member:
2938 * @message: A #GDBusMessage.
2939 * @value: The value to set.
2941 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_MEMBER header field.
2946 g_dbus_message_set_member (GDBusMessage *message,
2949 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2950 g_return_if_fail (value == NULL || g_dbus_is_member_name (value));
2951 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_MEMBER, value);
2954 /* ---------------------------------------------------------------------------------------------------- */
2957 * g_dbus_message_get_path:
2958 * @message: A #GDBusMessage.
2960 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_PATH header field.
2962 * Returns: The value.
2967 g_dbus_message_get_path (GDBusMessage *message)
2969 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
2970 return get_object_path_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH);
2974 * g_dbus_message_set_path:
2975 * @message: A #GDBusMessage.
2976 * @value: The value to set.
2978 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_PATH header field.
2983 g_dbus_message_set_path (GDBusMessage *message,
2986 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
2987 g_return_if_fail (value == NULL || g_variant_is_object_path (value));
2988 set_object_path_header (message, G_DBUS_MESSAGE_HEADER_FIELD_PATH, value);
2991 /* ---------------------------------------------------------------------------------------------------- */
2994 * g_dbus_message_get_sender:
2995 * @message: A #GDBusMessage.
2997 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_SENDER header field.
2999 * Returns: The value.
3004 g_dbus_message_get_sender (GDBusMessage *message)
3006 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3007 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SENDER);
3011 * g_dbus_message_set_sender:
3012 * @message: A #GDBusMessage.
3013 * @value: The value to set.
3015 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_SENDER header field.
3020 g_dbus_message_set_sender (GDBusMessage *message,
3023 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3024 g_return_if_fail (value == NULL || g_dbus_is_name (value));
3025 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SENDER, value);
3028 /* ---------------------------------------------------------------------------------------------------- */
3031 * g_dbus_message_get_destination:
3032 * @message: A #GDBusMessage.
3034 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION header field.
3036 * Returns: The value.
3041 g_dbus_message_get_destination (GDBusMessage *message)
3043 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3044 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION);
3048 * g_dbus_message_set_destination:
3049 * @message: A #GDBusMessage.
3050 * @value: The value to set.
3052 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION header field.
3057 g_dbus_message_set_destination (GDBusMessage *message,
3060 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3061 g_return_if_fail (value == NULL || g_dbus_is_name (value));
3062 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_DESTINATION, value);
3065 /* ---------------------------------------------------------------------------------------------------- */
3068 * g_dbus_message_get_error_name:
3069 * @message: A #GDBusMessage.
3071 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field.
3073 * Returns: The value.
3078 g_dbus_message_get_error_name (GDBusMessage *message)
3080 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3081 return get_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME);
3085 * g_dbus_message_set_error_name:
3086 * @message: A #GDBusMessage.
3087 * @value: The value to set.
3089 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field.
3094 g_dbus_message_set_error_name (GDBusMessage *message,
3097 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3098 g_return_if_fail (value == NULL || g_dbus_is_interface_name (value));
3099 set_string_header (message, G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME, value);
3102 /* ---------------------------------------------------------------------------------------------------- */
3105 * g_dbus_message_get_signature:
3106 * @message: A #GDBusMessage.
3108 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field.
3110 * Returns: The value.
3115 g_dbus_message_get_signature (GDBusMessage *message)
3118 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3119 ret = get_signature_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE);
3126 * g_dbus_message_set_signature:
3127 * @message: A #GDBusMessage.
3128 * @value: The value to set.
3130 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE header field.
3135 g_dbus_message_set_signature (GDBusMessage *message,
3138 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3139 g_return_if_fail (value == NULL || g_variant_is_signature (value));
3140 set_signature_header (message, G_DBUS_MESSAGE_HEADER_FIELD_SIGNATURE, value);
3143 /* ---------------------------------------------------------------------------------------------------- */
3146 * g_dbus_message_get_arg0:
3147 * @message: A #GDBusMessage.
3149 * Convenience to get the first item in the body of @message.
3151 * Returns: The string item or %NULL if the first item in the body of
3152 * @message is not a string.
3157 g_dbus_message_get_arg0 (GDBusMessage *message)
3161 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3165 if (message->body != NULL && g_variant_is_of_type (message->body, G_VARIANT_TYPE_TUPLE))
3168 item = g_variant_get_child_value (message->body, 0);
3169 if (g_variant_is_of_type (item, G_VARIANT_TYPE_STRING))
3170 ret = g_variant_get_string (item, NULL);
3171 g_variant_unref (item);
3177 /* ---------------------------------------------------------------------------------------------------- */
3180 * g_dbus_message_get_num_unix_fds:
3181 * @message: A #GDBusMessage.
3183 * Convenience getter for the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header field.
3185 * Returns: The value.
3190 g_dbus_message_get_num_unix_fds (GDBusMessage *message)
3192 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), 0);
3193 return get_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS);
3197 * g_dbus_message_set_num_unix_fds:
3198 * @message: A #GDBusMessage.
3199 * @value: The value to set.
3201 * Convenience setter for the %G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS header field.
3206 g_dbus_message_set_num_unix_fds (GDBusMessage *message,
3209 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3210 set_uint32_header (message, G_DBUS_MESSAGE_HEADER_FIELD_NUM_UNIX_FDS, value);
3213 /* ---------------------------------------------------------------------------------------------------- */
3216 * g_dbus_message_to_gerror:
3217 * @message: A #GDBusMessage.
3218 * @error: The #GError to set.
3220 * If @message is not of type %G_DBUS_MESSAGE_TYPE_ERROR does
3221 * nothing and returns %FALSE.
3223 * Otherwise this method encodes the error in @message as a #GError
3224 * using g_dbus_error_set_dbus_error() using the information in the
3225 * %G_DBUS_MESSAGE_HEADER_FIELD_ERROR_NAME header field of @message as
3226 * well as the first string item in @message's body.
3228 * Returns: %TRUE if @error was set, %FALSE otherwise.
3233 g_dbus_message_to_gerror (GDBusMessage *message,
3237 const gchar *error_name;
3239 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
3242 if (message->type != G_DBUS_MESSAGE_TYPE_ERROR)
3245 error_name = g_dbus_message_get_error_name (message);
3246 if (error_name != NULL)
3250 body = g_dbus_message_get_body (message);
3252 if (body != NULL && g_variant_is_of_type (body, G_VARIANT_TYPE ("(s)")))
3254 const gchar *error_message;
3255 g_variant_get (body, "(&s)", &error_message);
3256 g_dbus_error_set_dbus_error (error,
3263 /* these two situations are valid, yet pretty rare */
3266 g_dbus_error_set_dbus_error (error,
3269 _("Error return with body of type '%s'"),
3270 g_variant_get_type_string (body));
3274 g_dbus_error_set_dbus_error (error,
3277 _("Error return with empty body"));
3283 /* TOOD: this shouldn't happen - should check this at message serialization
3284 * time and disconnect the peer.
3289 "Error return without error-name header!");
3298 /* ---------------------------------------------------------------------------------------------------- */
3301 flags_to_string (GType flags_type, guint value)
3307 klass = g_type_class_ref (flags_type);
3308 s = g_string_new (NULL);
3309 for (n = 0; n < 32; n++)
3311 if ((value & (1<<n)) != 0)
3313 GFlagsValue *flags_value;
3314 flags_value = g_flags_get_first_value (klass, (1<<n));
3316 g_string_append_c (s, ',');
3317 if (flags_value != NULL)
3318 g_string_append (s, flags_value->value_nick);
3320 g_string_append_printf (s, "unknown (bit %d)", n);
3324 g_string_append (s, "none");
3325 g_type_class_unref (klass);
3326 return g_string_free (s, FALSE);
3330 _sort_keys_func (gconstpointer a,
3336 ia = GPOINTER_TO_INT (a);
3337 ib = GPOINTER_TO_INT (b);
3343 * g_dbus_message_print:
3344 * @message: A #GDBusMessage.
3345 * @indent: Indentation level.
3347 * Produces a human-readable multi-line description of @message.
3349 * The contents of the description has no ABI guarantees, the contents
3350 * and formatting is subject to change at any time. Typical output
3351 * looks something like this:
3353 * Type: method-call
3358 * path -> objectpath '/org/gtk/GDBus/TestObject'
3359 * interface -> 'org.gtk.GDBus.TestInterface'
3360 * member -> 'GimmeStdout'
3361 * destination -> ':1.146'
3363 * UNIX File Descriptors:
3368 * Type: method-return
3369 * Flags: no-reply-expected
3373 * reply-serial -> uint32 4
3374 * destination -> ':1.159'
3375 * sender -> ':1.146'
3376 * num-unix-fds -> uint32 1
3378 * UNIX File Descriptors:
3379 * fd 12: dev=0:10,mode=020620,ino=5,uid=500,gid=5,rdev=136:2,size=0,atime=1273085037,mtime=1273085851,ctime=1272982635
3382 * Returns: A string that should be freed with g_free().
3387 g_dbus_message_print (GDBusMessage *message,
3395 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3397 str = g_string_new (NULL);
3399 s = _g_dbus_enum_to_string (G_TYPE_DBUS_MESSAGE_TYPE, message->type);
3400 g_string_append_printf (str, "%*sType: %s\n", indent, "", s);
3402 s = flags_to_string (G_TYPE_DBUS_MESSAGE_FLAGS, message->flags);
3403 g_string_append_printf (str, "%*sFlags: %s\n", indent, "", s);
3405 g_string_append_printf (str, "%*sVersion: %d\n", indent, "", message->major_protocol_version);
3406 g_string_append_printf (str, "%*sSerial: %d\n", indent, "", message->serial);
3408 g_string_append_printf (str, "%*sHeaders:\n", indent, "");
3409 keys = g_hash_table_get_keys (message->headers);
3410 keys = g_list_sort (keys, _sort_keys_func);
3413 for (l = keys; l != NULL; l = l->next)
3415 gint key = GPOINTER_TO_INT (l->data);
3419 value = g_hash_table_lookup (message->headers, l->data);
3420 g_assert (value != NULL);
3422 s = _g_dbus_enum_to_string (G_TYPE_DBUS_MESSAGE_HEADER_FIELD, key);
3423 value_str = g_variant_print (value, TRUE);
3424 g_string_append_printf (str, "%*s %s -> %s\n", indent, "", s, value_str);
3431 g_string_append_printf (str, "%*s (none)\n", indent, "");
3433 g_string_append_printf (str, "%*sBody: ", indent, "");
3434 if (message->body != NULL)
3436 g_variant_print_string (message->body,
3442 g_string_append (str, "()");
3444 g_string_append (str, "\n");
3446 g_string_append_printf (str, "%*sUNIX File Descriptors:\n", indent, "");
3447 if (message->fd_list != NULL)
3453 fds = g_unix_fd_list_peek_fds (message->fd_list, &num_fds);
3456 for (n = 0; n < num_fds; n++)
3459 struct stat statbuf;
3460 fs = g_string_new (NULL);
3461 if (fstat (fds[n], &statbuf) == 0)
3463 g_string_append_printf (fs, "%s" "dev=%d:%d", fs->len > 0 ? "," : "",
3464 major (statbuf.st_dev), minor (statbuf.st_dev));
3465 g_string_append_printf (fs, "%s" "mode=0%o", fs->len > 0 ? "," : "",
3467 g_string_append_printf (fs, "%s" "ino=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
3468 (guint64) statbuf.st_ino);
3469 g_string_append_printf (fs, "%s" "uid=%u", fs->len > 0 ? "," : "",
3470 (guint) statbuf.st_uid);
3471 g_string_append_printf (fs, "%s" "gid=%u", fs->len > 0 ? "," : "",
3472 (guint) statbuf.st_gid);
3473 g_string_append_printf (fs, "%s" "rdev=%d:%d", fs->len > 0 ? "," : "",
3474 major (statbuf.st_rdev), minor (statbuf.st_rdev));
3475 g_string_append_printf (fs, "%s" "size=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
3476 (guint64) statbuf.st_size);
3477 g_string_append_printf (fs, "%s" "atime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
3478 (guint64) statbuf.st_atime);
3479 g_string_append_printf (fs, "%s" "mtime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
3480 (guint64) statbuf.st_mtime);
3481 g_string_append_printf (fs, "%s" "ctime=%" G_GUINT64_FORMAT, fs->len > 0 ? "," : "",
3482 (guint64) statbuf.st_ctime);
3486 g_string_append_printf (fs, "(fstat failed: %s)", strerror (errno));
3488 g_string_append_printf (str, "%*s fd %d: %s\n", indent, "", fds[n], fs->str);
3489 g_string_free (fs, TRUE);
3494 g_string_append_printf (str, "%*s (empty)\n", indent, "");
3499 g_string_append_printf (str, "%*s (none)\n", indent, "");
3503 return g_string_free (str, FALSE);
3507 * g_dbus_message_get_locked:
3508 * @message: A #GDBusMessage.
3510 * Checks whether @message is locked. To monitor changes to this
3511 * value, conncet to the #GObject::notify signal to listen for changes
3512 * on the #GDBusMessage:locked property.
3514 * Returns: %TRUE if @message is locked, %FALSE otherwise.
3519 g_dbus_message_get_locked (GDBusMessage *message)
3521 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), FALSE);
3522 return message->locked;
3526 * g_dbus_message_lock:
3527 * @message: A #GDBusMessage.
3529 * If @message is locked, does nothing. Otherwise locks the message.
3534 g_dbus_message_lock (GDBusMessage *message)
3536 g_return_if_fail (G_IS_DBUS_MESSAGE (message));
3538 if (message->locked)
3541 message->locked = TRUE;
3542 g_object_notify (G_OBJECT (message), "locked");
3549 * g_dbus_message_copy:
3550 * @message: A #GDBusMessage.
3551 * @error: Return location for error or %NULL.
3553 * Copies @message. The copy is a deep copy and the returned
3554 * #GDBusMessage is completely identical except that it is guaranteed
3557 * This operation can fail if e.g. @message contains file descriptors
3558 * and the per-process or system-wide open files limit is reached.
3560 * Returns: (transfer full): A new #GDBusMessage or %NULL if @error is set.
3561 * Free with g_object_unref().
3566 g_dbus_message_copy (GDBusMessage *message,
3570 GHashTableIter iter;
3571 gpointer header_key;
3572 GVariant *header_value;
3574 g_return_val_if_fail (G_IS_DBUS_MESSAGE (message), NULL);
3575 g_return_val_if_fail (error == NULL || *error == NULL, NULL);
3577 ret = g_dbus_message_new ();
3578 ret->type = message->type;
3579 ret->flags = message->flags;
3580 ret->byte_order = message->byte_order;
3581 ret->major_protocol_version = message->major_protocol_version;
3582 ret->serial = message->serial;
3585 if (message->fd_list != NULL)
3591 ret->fd_list = g_unix_fd_list_new ();
3592 fds = g_unix_fd_list_peek_fds (message->fd_list, &num_fds);
3593 for (n = 0; n < num_fds; n++)
3595 if (g_unix_fd_list_append (ret->fd_list,
3599 g_object_unref (ret);
3607 /* see https://bugzilla.gnome.org/show_bug.cgi?id=624546#c8 for why it's fine
3608 * to just ref (as opposed to deep-copying) the GVariant instances
3610 ret->body = message->body != NULL ? g_variant_ref (message->body) : NULL;
3611 g_hash_table_iter_init (&iter, message->headers);
3612 while (g_hash_table_iter_next (&iter, &header_key, (gpointer) &header_value))
3613 g_hash_table_insert (ret->headers, header_key, g_variant_ref (header_value));