1 /* -*- mode: C; c-file-style: "gnu" -*- */
2 /* dbus-message.c DBusMessage object
4 * Copyright (C) 2002, 2003 Red Hat Inc.
5 * Copyright (C) 2002, 2003 CodeFactory AB
7 * Licensed under the Academic Free License version 1.2
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include "dbus-internals.h"
26 #include "dbus-marshal.h"
27 #include "dbus-message.h"
28 #include "dbus-message-internal.h"
29 #include "dbus-memory.h"
30 #include "dbus-list.h"
31 #include "dbus-message-builder.h"
35 * @defgroup DBusMessageInternals DBusMessage implementation details
36 * @ingroup DBusInternals
37 * @brief DBusMessage private implementation details.
39 * The guts of DBusMessage and its methods.
57 static dbus_bool_t field_is_named[FIELD_LAST] =
59 FALSE, /* FIELD_HEADER_LENGTH */
60 FALSE, /* FIELD_BODY_LENGTH */
61 FALSE, /* FIELD_CLIENT_SERIAL */
62 TRUE, /* FIELD_NAME */
63 TRUE, /* FIELD_SERVICE */
64 TRUE, /* FIELD_SENDER */
65 TRUE /* FIELD_REPLY_SERIAL */
70 int offset; /**< Offset to start of field (location of name of field
76 * @brief Internals of DBusMessage
78 * Object representing a message received from or to be sent to
79 * another application. This is an opaque object, all members
84 dbus_atomic_t refcount; /**< Reference count */
86 DBusString header; /**< Header network data, stored
87 * separately from body so we can
88 * independently realloc it.
91 HeaderField header_fields[FIELD_LAST]; /**< Track the location
92 * of each field in "header"
95 dbus_uint32_t client_serial; /**< Cached client serial value for speed */
96 dbus_uint32_t reply_serial; /**< Cached reply serial value for speed */
98 int header_padding; /**< bytes of alignment in header */
100 DBusString body; /**< Body network data. */
102 char byte_order; /**< Message byte order. */
104 DBusList *size_counters; /**< 0-N DBusCounter used to track message size. */
105 long size_counter_delta; /**< Size we incremented the size counters by. */
107 dbus_uint32_t changed_stamp; /**< Incremented when iterators are invalidated. */
109 unsigned int locked : 1; /**< Message being sent, no modifications allowed. */
113 DBUS_MESSAGE_ITER_TYPE_MESSAGE,
114 DBUS_MESSAGE_ITER_TYPE_ARRAY,
115 DBUS_MESSAGE_ITER_TYPE_DICT
118 /** typedef for internals of message iterator */
119 typedef struct DBusMessageRealIter DBusMessageRealIter;
122 * @brief Internals of DBusMessageIter
124 * Object representing a position in a message. All fields are internal.
126 struct DBusMessageRealIter
128 DBusMessageRealIter *parent_iter; /**< parent iter, or NULL */
129 DBusMessage *message; /**< Message used */
130 dbus_uint32_t changed_stamp; /**< stamp to detect invalid iters */
132 /* This is an int instead of an enum to get a guaranteed size for the dummy: */
133 int type; /**< type of iter */
135 int pos; /**< Current position in the string */
136 int end; /**< position right after the container */
137 int container_start; /**< offset of the start of the container */
138 int container_length_pos; /**< offset of the length of the container */
140 int wrote_dict_key; /**< whether we wrote the dict key for the current dict element */
142 int array_type_pos; /**< pointer to the position of the array element type */
143 int array_type_done; /**< TRUE if the array type is fully finished */
147 * Gets the data to be sent over the network for this message.
148 * The header and then the body should be written out.
149 * This function is guaranteed to always return the same
150 * data once a message is locked (with _dbus_message_lock()).
152 * @param message the message.
153 * @param header return location for message header data.
154 * @param body return location for message body data.
157 _dbus_message_get_network_data (DBusMessage *message,
158 const DBusString **header,
159 const DBusString **body)
161 _dbus_assert (message->locked);
163 *header = &message->header;
164 *body = &message->body;
168 clear_header_padding (DBusMessage *message)
170 _dbus_string_shorten (&message->header,
171 message->header_padding);
172 message->header_padding = 0;
176 append_header_padding (DBusMessage *message)
179 old_len = _dbus_string_get_length (&message->header);
180 if (!_dbus_string_align_length (&message->header, 8))
183 message->header_padding = _dbus_string_get_length (&message->header) - old_len;
189 adjust_field_offsets (DBusMessage *message,
199 while (i < FIELD_LAST)
201 if (message->header_fields[i].offset > offsets_after)
202 message->header_fields[i].offset += delta;
208 #ifdef DBUS_BUILD_TESTS
209 /* tests-only until it's actually used */
211 get_int_field (DBusMessage *message,
216 _dbus_assert (field < FIELD_LAST);
218 offset = message->header_fields[field].offset;
221 return -1; /* useless if -1 is a valid value of course */
223 return _dbus_demarshal_int32 (&message->header,
231 get_uint_field (DBusMessage *message,
236 _dbus_assert (field < FIELD_LAST);
238 offset = message->header_fields[field].offset;
241 return -1; /* useless if -1 is a valid value of course */
243 return _dbus_demarshal_uint32 (&message->header,
250 get_string_field (DBusMessage *message,
257 offset = message->header_fields[field].offset;
259 _dbus_assert (field < FIELD_LAST);
264 /* offset points to string length, string data follows it */
265 /* FIXME _dbus_demarshal_const_string() that returned
266 * a reference to the string plus its len might be nice.
270 *len = _dbus_demarshal_uint32 (&message->header,
275 data = _dbus_string_get_const_data (&message->header);
277 return data + (offset + 4);
280 #ifdef DBUS_BUILD_TESTS
282 append_int_field (DBusMessage *message,
289 _dbus_assert (!message->locked);
291 clear_header_padding (message);
293 orig_len = _dbus_string_get_length (&message->header);
295 if (!_dbus_string_align_length (&message->header, 4))
298 if (!_dbus_string_append_len (&message->header, name, 4))
301 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_INT32))
304 if (!_dbus_string_align_length (&message->header, 4))
307 message->header_fields[FIELD_REPLY_SERIAL].offset =
308 _dbus_string_get_length (&message->header);
310 if (!_dbus_marshal_int32 (&message->header, message->byte_order,
314 if (!append_header_padding (message))
320 message->header_fields[field].offset = -1;
321 _dbus_string_set_length (&message->header, orig_len);
323 /* this must succeed because it was allocated on function entry and
324 * DBusString doesn't ever realloc smaller
326 if (!append_header_padding (message))
327 _dbus_assert_not_reached ("failed to reappend header padding");
333 append_uint_field (DBusMessage *message,
340 _dbus_assert (!message->locked);
342 clear_header_padding (message);
344 orig_len = _dbus_string_get_length (&message->header);
346 if (!_dbus_string_align_length (&message->header, 4))
349 if (!_dbus_string_append_len (&message->header, name, 4))
352 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_UINT32))
355 if (!_dbus_string_align_length (&message->header, 4))
358 message->header_fields[FIELD_REPLY_SERIAL].offset =
359 _dbus_string_get_length (&message->header);
361 if (!_dbus_marshal_uint32 (&message->header, message->byte_order,
365 if (!append_header_padding (message))
371 message->header_fields[field].offset = -1;
372 _dbus_string_set_length (&message->header, orig_len);
374 /* this must succeed because it was allocated on function entry and
375 * DBusString doesn't ever realloc smaller
377 if (!append_header_padding (message))
378 _dbus_assert_not_reached ("failed to reappend header padding");
383 append_string_field (DBusMessage *message,
390 _dbus_assert (!message->locked);
392 clear_header_padding (message);
394 orig_len = _dbus_string_get_length (&message->header);
396 if (!_dbus_string_align_length (&message->header, 4))
399 if (!_dbus_string_append_len (&message->header, name, 4))
402 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_STRING))
405 if (!_dbus_string_align_length (&message->header, 4))
408 message->header_fields[field].offset =
409 _dbus_string_get_length (&message->header);
411 if (!_dbus_marshal_string (&message->header, message->byte_order,
415 if (!append_header_padding (message))
421 message->header_fields[field].offset = -1;
422 _dbus_string_set_length (&message->header, orig_len);
424 /* this must succeed because it was allocated on function entry and
425 * DBusString doesn't ever realloc smaller
427 if (!append_header_padding (message))
428 _dbus_assert_not_reached ("failed to reappend header padding");
433 #ifdef DBUS_BUILD_TESTS
434 /* This isn't used, but building it when tests are enabled just to
435 * keep it compiling if we need it in future
438 delete_int_or_uint_field (DBusMessage *message,
441 int offset = message->header_fields[field].offset;
443 _dbus_assert (!message->locked);
444 _dbus_assert (field_is_named[field]);
449 clear_header_padding (message);
451 /* The field typecode and name take up 8 bytes */
452 _dbus_string_delete (&message->header,
456 message->header_fields[field].offset = -1;
458 adjust_field_offsets (message,
462 append_header_padding (message);
467 delete_string_field (DBusMessage *message,
470 int offset = message->header_fields[field].offset;
474 _dbus_assert (!message->locked);
475 _dbus_assert (field_is_named[field]);
480 clear_header_padding (message);
482 get_string_field (message, field, &len);
484 /* The field typecode and name take up 8 bytes, and the nul
485 * termination is 1 bytes, string length integer is 4 bytes
487 delete_len = 8 + 4 + 1 + len;
489 _dbus_string_delete (&message->header,
493 message->header_fields[field].offset = -1;
495 adjust_field_offsets (message,
499 append_header_padding (message);
502 #ifdef DBUS_BUILD_TESTS
504 set_int_field (DBusMessage *message,
508 int offset = message->header_fields[field].offset;
510 _dbus_assert (!message->locked);
514 /* need to append the field */
519 _dbus_assert_not_reached ("appending an int field we don't support appending");
525 _dbus_marshal_set_int32 (&message->header,
535 set_uint_field (DBusMessage *message,
539 int offset = message->header_fields[field].offset;
541 _dbus_assert (!message->locked);
545 /* need to append the field */
549 case FIELD_REPLY_SERIAL:
550 return append_uint_field (message, field,
551 DBUS_HEADER_FIELD_REPLY,
554 _dbus_assert_not_reached ("appending a uint field we don't support appending");
560 _dbus_marshal_set_uint32 (&message->header,
569 set_string_field (DBusMessage *message,
573 int offset = message->header_fields[field].offset;
575 _dbus_assert (!message->locked);
576 _dbus_assert (value != NULL);
580 /* need to append the field */
585 return append_string_field (message, field,
586 DBUS_HEADER_FIELD_SENDER,
589 _dbus_assert_not_reached ("appending a string field we don't support appending");
600 clear_header_padding (message);
602 old_len = _dbus_string_get_length (&message->header);
604 len = strlen (value);
606 _dbus_string_init_const_len (&v, value,
607 len + 1); /* include nul */
608 if (!_dbus_marshal_set_string (&message->header,
614 new_len = _dbus_string_get_length (&message->header);
616 adjust_field_offsets (message,
620 if (!append_header_padding (message))
626 /* this must succeed because it was allocated on function entry and
627 * DBusString doesn't ever realloc smaller
629 if (!append_header_padding (message))
630 _dbus_assert_not_reached ("failed to reappend header padding");
637 * Sets the serial number of a message.
638 * This can only be done once on a message.
640 * @param message the message
641 * @param serial the serial
644 _dbus_message_set_serial (DBusMessage *message,
647 _dbus_assert (!message->locked);
648 _dbus_assert (dbus_message_get_serial (message) == 0);
650 set_uint_field (message, FIELD_CLIENT_SERIAL,
652 message->client_serial = serial;
656 * Sets the reply serial of a message (the client serial
657 * of the message this is a reply to).
659 * @param message the message
660 * @param reply_serial the client serial
661 * @returns #FALSE if not enough memory
664 dbus_message_set_reply_serial (DBusMessage *message,
665 dbus_uint32_t reply_serial)
667 _dbus_assert (!message->locked);
669 if (set_uint_field (message, FIELD_REPLY_SERIAL,
672 message->reply_serial = reply_serial;
680 * Returns the serial of a message or -1 if none has been specified.
681 * The message's serial number is provided by the application sending
682 * the message and is used to identify replies to this message.
684 * @param message the message
685 * @returns the client serial
688 dbus_message_get_serial (DBusMessage *message)
690 return message->client_serial;
694 * Returns the serial that the message is
695 * a reply to or 0 if none.
697 * @param message the message
698 * @returns the reply serial
701 dbus_message_get_reply_serial (DBusMessage *message)
703 return message->reply_serial;
707 * Adds a counter to be incremented immediately with the
708 * size of this message, and decremented by the size
709 * of this message when this message if finalized.
710 * The link contains a counter with its refcount already
711 * incremented, but the counter itself not incremented.
712 * Ownership of link and counter refcount is passed to
715 * @param message the message
716 * @param link link with counter as data
719 _dbus_message_add_size_counter_link (DBusMessage *message,
722 /* right now we don't recompute the delta when message
723 * size changes, and that's OK for current purposes
724 * I think, but could be important to change later.
725 * Do recompute it whenever there are no outstanding counters,
726 * since it's basically free.
728 if (message->size_counters == NULL)
730 message->size_counter_delta =
731 _dbus_string_get_length (&message->header) +
732 _dbus_string_get_length (&message->body);
735 _dbus_verbose ("message has size %ld\n",
736 message->size_counter_delta);
740 _dbus_list_append_link (&message->size_counters, link);
742 _dbus_counter_adjust (link->data, message->size_counter_delta);
746 * Adds a counter to be incremented immediately with the
747 * size of this message, and decremented by the size
748 * of this message when this message if finalized.
750 * @param message the message
751 * @param counter the counter
752 * @returns #FALSE if no memory
755 _dbus_message_add_size_counter (DBusMessage *message,
756 DBusCounter *counter)
760 link = _dbus_list_alloc_link (counter);
764 _dbus_counter_ref (counter);
765 _dbus_message_add_size_counter_link (message, link);
771 * Removes a counter tracking the size of this message, and decrements
772 * the counter by the size of this message.
774 * @param message the message
775 * @param counter the counter
778 _dbus_message_remove_size_counter (DBusMessage *message,
779 DBusCounter *counter)
781 if (!_dbus_list_remove_last (&message->size_counters,
783 _dbus_assert_not_reached ("Removed a message size counter that was not added");
785 _dbus_counter_adjust (counter, message->size_counter_delta);
787 _dbus_counter_unref (counter);
791 dbus_message_create_header (DBusMessage *message,
797 if (!_dbus_string_append_byte (&message->header, message->byte_order))
801 if (!_dbus_string_append_byte (&message->header, flags))
804 if (!_dbus_string_append_byte (&message->header, DBUS_MAJOR_PROTOCOL_VERSION))
807 if (!_dbus_string_append_byte (&message->header, 0))
810 message->header_fields[FIELD_HEADER_LENGTH].offset = 4;
811 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
814 message->header_fields[FIELD_BODY_LENGTH].offset = 8;
815 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
818 message->header_fields[FIELD_CLIENT_SERIAL].offset = 12;
819 if (!_dbus_marshal_int32 (&message->header, message->byte_order, -1))
822 /* Marshal message service */
825 if (!append_string_field (message,
827 DBUS_HEADER_FIELD_SERVICE,
832 _dbus_assert (name != NULL);
833 if (!append_string_field (message,
835 DBUS_HEADER_FIELD_NAME,
843 * Locks a message. Allows checking that applications don't keep a
844 * reference to a message in the outgoing queue and change it
845 * underneath us. Messages are locked when they enter the outgoing
846 * queue (dbus_connection_send_message()), and the library complains
847 * if the message is modified while locked.
849 * @param message the message to lock.
852 _dbus_message_lock (DBusMessage *message)
854 if (!message->locked)
856 /* Fill in our lengths */
857 set_uint_field (message,
859 _dbus_string_get_length (&message->header));
861 set_uint_field (message,
863 _dbus_string_get_length (&message->body));
865 message->locked = TRUE;
872 * @defgroup DBusMessage DBusMessage
874 * @brief Message to be sent or received over a DBusConnection.
876 * A DBusMessage is the most basic unit of communication over a
877 * DBusConnection. A DBusConnection represents a stream of messages
878 * received from a remote application, and a stream of messages
879 * sent to a remote application.
885 * @typedef DBusMessage
887 * Opaque data type representing a message received from or to be
888 * sent to another application.
892 dbus_message_new_empty_header (void)
894 DBusMessage *message;
897 message = dbus_new0 (DBusMessage, 1);
901 message->refcount = 1;
902 message->byte_order = DBUS_COMPILER_BYTE_ORDER;
903 message->client_serial = 0;
904 message->reply_serial = 0;
907 while (i < FIELD_LAST)
909 message->header_fields[i].offset = -1;
913 if (!_dbus_string_init (&message->header))
919 if (!_dbus_string_init (&message->body))
921 _dbus_string_free (&message->header);
931 * Constructs a new message. Returns #NULL if memory can't be
932 * allocated for the message. The service may be #NULL in which case
933 * no service is set; this is appropriate when using D-BUS in a
934 * peer-to-peer context (no message bus).
936 * @todo reverse the arguments, first 'name' then 'service'
937 * as 'name' is more fundamental
939 * @param name name of the message
940 * @param destination_service service that the message should be sent to or #NULL
941 * @returns a new DBusMessage, free with dbus_message_unref()
942 * @see dbus_message_unref()
945 dbus_message_new (const char *name,
946 const char *destination_service)
948 DBusMessage *message;
950 _dbus_return_val_if_fail (name != NULL, NULL);
952 message = dbus_message_new_empty_header ();
956 if (!dbus_message_create_header (message, name, destination_service))
958 dbus_message_unref (message);
966 * Constructs a message that is a reply to some other
967 * message. Returns #NULL if memory can't be allocated
970 * @param original_message the message which the created
971 * message is a reply to.
972 * @returns a new DBusMessage, free with dbus_message_unref()
973 * @see dbus_message_new(), dbus_message_unref()
976 dbus_message_new_reply (DBusMessage *original_message)
978 DBusMessage *message;
979 const char *sender, *name;
981 _dbus_return_val_if_fail (original_message != NULL, NULL);
983 sender = get_string_field (original_message,
985 name = get_string_field (original_message,
988 /* sender is allowed to be null here in peer-to-peer case */
990 message = dbus_message_new (name, sender);
995 if (!dbus_message_set_reply_serial (message,
996 dbus_message_get_serial (original_message)))
998 dbus_message_unref (message);
1006 * Creates a new message that is an error reply to a certain message.
1008 * @param original_message the original message
1009 * @param error_name the error name
1010 * @param error_message the error message string or #NULL for none
1011 * @returns a new error message
1014 dbus_message_new_error_reply (DBusMessage *original_message,
1015 const char *error_name,
1016 const char *error_message)
1018 DBusMessage *message;
1020 DBusMessageIter iter;
1022 _dbus_return_val_if_fail (original_message != NULL, NULL);
1023 _dbus_return_val_if_fail (error_name != NULL, NULL);
1025 sender = get_string_field (original_message,
1026 FIELD_SENDER, NULL);
1028 _dbus_assert (sender != NULL);
1030 message = dbus_message_new (error_name, sender);
1032 if (message == NULL)
1035 if (!dbus_message_set_reply_serial (message,
1036 dbus_message_get_serial (original_message)))
1038 dbus_message_unref (message);
1042 if (error_message != NULL)
1044 dbus_message_append_iter_init (message, &iter);
1045 if (!dbus_message_iter_append_string (&iter, error_message))
1047 dbus_message_unref (message);
1052 dbus_message_set_is_error (message, TRUE);
1058 * Creates a new message that is an exact replica of the message
1059 * specified, except that its refcount is set to 1.
1061 * @param message the message.
1062 * @returns the new message.
1065 dbus_message_copy (const DBusMessage *message)
1067 DBusMessage *retval;
1070 _dbus_return_val_if_fail (message != NULL, NULL);
1072 retval = dbus_new0 (DBusMessage, 1);
1076 retval->refcount = 1;
1077 retval->byte_order = message->byte_order;
1078 retval->client_serial = message->client_serial;
1079 retval->reply_serial = message->reply_serial;
1080 retval->header_padding = message->header_padding;
1081 retval->locked = FALSE;
1083 if (!_dbus_string_init (&retval->header))
1089 if (!_dbus_string_init (&retval->body))
1091 _dbus_string_free (&retval->header);
1096 if (!_dbus_string_copy (&message->header, 0,
1097 &retval->header, 0))
1099 _dbus_string_free (&retval->header);
1100 _dbus_string_free (&retval->body);
1106 if (!_dbus_string_copy (&message->body, 0,
1109 _dbus_string_free (&retval->header);
1110 _dbus_string_free (&retval->body);
1116 for (i = 0; i < FIELD_LAST; i++)
1118 retval->header_fields[i].offset = message->header_fields[i].offset;
1126 * Increments the reference count of a DBusMessage.
1128 * @param message The message
1129 * @see dbus_message_unref
1132 dbus_message_ref (DBusMessage *message)
1134 dbus_atomic_t refcount;
1136 _dbus_return_if_fail (message != NULL);
1138 refcount = _dbus_atomic_inc (&message->refcount);
1139 _dbus_assert (refcount > 1);
1143 free_size_counter (void *element,
1146 DBusCounter *counter = element;
1147 DBusMessage *message = data;
1149 _dbus_counter_adjust (counter, - message->size_counter_delta);
1151 _dbus_counter_unref (counter);
1155 * Decrements the reference count of a DBusMessage.
1157 * @param message The message
1158 * @see dbus_message_ref
1161 dbus_message_unref (DBusMessage *message)
1163 dbus_atomic_t refcount;
1165 _dbus_return_if_fail (message != NULL);
1167 refcount = _dbus_atomic_dec (&message->refcount);
1169 _dbus_assert (refcount >= 0);
1173 _dbus_list_foreach (&message->size_counters,
1174 free_size_counter, message);
1175 _dbus_list_clear (&message->size_counters);
1177 _dbus_string_free (&message->header);
1178 _dbus_string_free (&message->body);
1180 dbus_free (message);
1185 * Gets the name of a message.
1187 * @param message the message
1188 * @returns the message name (should not be freed)
1191 dbus_message_get_name (DBusMessage *message)
1193 _dbus_return_val_if_fail (message != NULL, NULL);
1195 return get_string_field (message, FIELD_NAME, NULL);
1199 * Gets the destination service of a message.
1201 * @todo I think if we have set_sender/get_sender,
1202 * this function might be better named set_destination/
1203 * get_destination for clarity, as the sender
1204 * is also a service name.
1206 * @param message the message
1207 * @returns the message destination service (should not be freed)
1210 dbus_message_get_service (DBusMessage *message)
1212 _dbus_return_val_if_fail (message != NULL, NULL);
1214 return get_string_field (message, FIELD_SERVICE, NULL);
1218 * Appends fields to a message given a variable argument list. The
1219 * variable argument list should contain the type of the argument
1220 * followed by the value to add. Array values are specified by an int
1221 * typecode followed by a pointer to the array followed by an int
1222 * giving the length of the array. The argument list must be
1223 * terminated with DBUS_TYPE_INVALID.
1225 * This function doesn't support dicts or non-fundamental arrays.
1227 * This function supports #DBUS_TYPE_INT64 and #DBUS_TYPE_UINT64
1228 * only if #DBUS_HAVE_INT64 is defined.
1230 * @param message the message
1231 * @param first_arg_type type of the first argument
1232 * @param ... value of first argument, list of additional type-value pairs
1233 * @returns #TRUE on success
1236 dbus_message_append_args (DBusMessage *message,
1243 _dbus_return_val_if_fail (message != NULL, FALSE);
1245 va_start (var_args, first_arg_type);
1246 retval = dbus_message_append_args_valist (message,
1255 * This function takes a va_list for use by language bindings.
1256 * It's otherwise the same as dbus_message_append_args().
1258 * @todo: Shouldn't this function clean up the changes to the message
1259 * on failures? (Yes)
1261 * @see dbus_message_append_args.
1262 * @param message the message
1263 * @param first_arg_type type of first argument
1264 * @param var_args value of first argument, then list of type/value pairs
1265 * @returns #TRUE on success
1268 dbus_message_append_args_valist (DBusMessage *message,
1273 DBusMessageIter iter;
1275 _dbus_return_val_if_fail (message != NULL, FALSE);
1277 old_len = _dbus_string_get_length (&message->body);
1279 type = first_arg_type;
1281 dbus_message_append_iter_init (message, &iter);
1288 if (!dbus_message_iter_append_nil (&iter))
1291 case DBUS_TYPE_BOOLEAN:
1292 if (!dbus_message_iter_append_boolean (&iter, va_arg (var_args, dbus_bool_t)))
1295 case DBUS_TYPE_INT32:
1296 if (!dbus_message_iter_append_int32 (&iter, va_arg (var_args, dbus_int32_t)))
1299 case DBUS_TYPE_UINT32:
1300 if (!dbus_message_iter_append_uint32 (&iter, va_arg (var_args, dbus_uint32_t)))
1303 #ifdef DBUS_HAVE_INT64
1304 case DBUS_TYPE_INT64:
1305 if (!dbus_message_iter_append_int64 (&iter, va_arg (var_args, dbus_int64_t)))
1308 case DBUS_TYPE_UINT64:
1309 if (!dbus_message_iter_append_uint64 (&iter, va_arg (var_args, dbus_uint64_t)))
1312 #endif /* DBUS_HAVE_INT64 */
1313 case DBUS_TYPE_DOUBLE:
1314 if (!dbus_message_iter_append_double (&iter, va_arg (var_args, double)))
1317 case DBUS_TYPE_STRING:
1318 if (!dbus_message_iter_append_string (&iter, va_arg (var_args, const char *)))
1321 case DBUS_TYPE_NAMED:
1324 unsigned char *data;
1327 name = va_arg (var_args, const char *);
1328 data = va_arg (var_args, unsigned char *);
1329 len = va_arg (var_args, int);
1331 if (!dbus_message_iter_append_named (&iter, name, data, len))
1335 case DBUS_TYPE_ARRAY:
1340 type = va_arg (var_args, int);
1341 data = va_arg (var_args, void *);
1342 len = va_arg (var_args, int);
1346 case DBUS_TYPE_BYTE:
1347 if (!dbus_message_iter_append_byte_array (&iter, (unsigned char *)data, len))
1350 case DBUS_TYPE_BOOLEAN:
1351 if (!dbus_message_iter_append_boolean_array (&iter, (unsigned char *)data, len))
1354 case DBUS_TYPE_INT32:
1355 if (!dbus_message_iter_append_int32_array (&iter, (dbus_int32_t *)data, len))
1358 case DBUS_TYPE_UINT32:
1359 if (!dbus_message_iter_append_uint32_array (&iter, (dbus_uint32_t *)data, len))
1362 #ifdef DBUS_HAVE_INT64
1363 case DBUS_TYPE_INT64:
1364 if (!dbus_message_iter_append_int64_array (&iter, (dbus_int64_t *)data, len))
1367 case DBUS_TYPE_UINT64:
1368 if (!dbus_message_iter_append_uint64_array (&iter, (dbus_uint64_t *)data, len))
1371 #endif /* DBUS_HAVE_INT64 */
1372 case DBUS_TYPE_DOUBLE:
1373 if (!dbus_message_iter_append_double_array (&iter, (double *)data, len))
1376 case DBUS_TYPE_STRING:
1377 if (!dbus_message_iter_append_string_array (&iter, (const char **)data, len))
1381 case DBUS_TYPE_ARRAY:
1382 case DBUS_TYPE_NAMED:
1383 case DBUS_TYPE_DICT:
1384 _dbus_warn ("dbus_message_append_args_valist doesn't support recursive arrays\n");
1387 _dbus_warn ("Unknown field type %d\n", type);
1393 case DBUS_TYPE_DICT:
1394 _dbus_warn ("dbus_message_append_args_valist doesn't support dicts\n");
1397 _dbus_warn ("Unknown field type %d\n", type);
1401 type = va_arg (var_args, int);
1412 * Gets arguments from a message given a variable argument list.
1413 * The variable argument list should contain the type of the
1414 * argumen followed by a pointer to where the value should be
1415 * stored. The list is terminated with 0.
1417 * @param message the message
1418 * @param error error to be filled in on failure
1419 * @param first_arg_type the first argument type
1420 * @param ... location for first argument value, then list of type-location pairs
1421 * @returns #FALSE if the error was set
1424 dbus_message_get_args (DBusMessage *message,
1432 _dbus_return_val_if_fail (message != NULL, FALSE);
1433 _dbus_return_val_if_error_is_set (error, FALSE);
1435 va_start (var_args, first_arg_type);
1436 retval = dbus_message_get_args_valist (message, error, first_arg_type, var_args);
1443 * This function takes a va_list for use by language bindings
1445 * @todo We need to free the argument data when an error occurs.
1447 * @see dbus_message_get_args
1448 * @param message the message
1449 * @param error error to be filled in
1450 * @param first_arg_type type of the first argument
1451 * @param var_args return location for first argument, followed by list of type/location pairs
1452 * @returns #FALSE if error was set
1455 dbus_message_get_args_valist (DBusMessage *message,
1460 DBusMessageIter iter;
1462 _dbus_return_val_if_fail (message != NULL, FALSE);
1463 _dbus_return_val_if_error_is_set (error, FALSE);
1465 dbus_message_iter_init (message, &iter);
1466 return dbus_message_iter_get_args_valist (&iter, error, first_arg_type, var_args);
1470 * Gets arguments from a message iterator given a variable argument list.
1471 * The variable argument list should contain the type of the
1472 * argumen followed by a pointer to where the value should be
1473 * stored. The list is terminated with 0.
1475 * @param iter the message iterator
1476 * @param error error to be filled in on failure
1477 * @param first_arg_type the first argument type
1478 * @param ... location for first argument value, then list of type-location pairs
1479 * @returns #FALSE if the error was set
1482 dbus_message_iter_get_args (DBusMessageIter *iter,
1490 _dbus_return_val_if_fail (iter != NULL, FALSE);
1491 _dbus_return_val_if_error_is_set (error, FALSE);
1493 va_start (var_args, first_arg_type);
1494 retval = dbus_message_iter_get_args_valist (iter, error, first_arg_type, var_args);
1501 * This function takes a va_list for use by language bindings
1503 * This function supports #DBUS_TYPE_INT64 and #DBUS_TYPE_UINT64
1504 * only if #DBUS_HAVE_INT64 is defined.
1506 * @todo this function (or some lower-level non-convenience function)
1507 * needs better error handling; should allow the application to
1508 * distinguish between out of memory, and bad data from the remote
1509 * app. It also needs to not leak a bunch of args when it gets
1510 * to the arg that's bad, as that would be a security hole
1511 * (allow one app to force another to leak memory)
1513 * @todo We need to free the argument data when an error occurs.
1515 * @see dbus_message_get_args
1516 * @param iter the message iter
1517 * @param error error to be filled in
1518 * @param first_arg_type type of the first argument
1519 * @param var_args return location for first argument, followed by list of type/location pairs
1520 * @returns #FALSE if error was set
1523 dbus_message_iter_get_args_valist (DBusMessageIter *iter,
1528 int spec_type, msg_type, i;
1531 _dbus_return_val_if_fail (iter != NULL, FALSE);
1532 _dbus_return_val_if_error_is_set (error, FALSE);
1536 spec_type = first_arg_type;
1539 while (spec_type != 0)
1541 msg_type = dbus_message_iter_get_arg_type (iter);
1543 if (msg_type != spec_type)
1545 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1546 "Argument %d is specified to be of type \"%s\", but "
1547 "is actually of type \"%s\"\n", i,
1548 _dbus_type_to_string (spec_type),
1549 _dbus_type_to_string (msg_type));
1558 case DBUS_TYPE_BYTE:
1562 ptr = va_arg (var_args, unsigned char *);
1564 *ptr = dbus_message_iter_get_byte (iter);
1567 case DBUS_TYPE_BOOLEAN:
1571 ptr = va_arg (var_args, dbus_bool_t *);
1573 *ptr = dbus_message_iter_get_boolean (iter);
1576 case DBUS_TYPE_INT32:
1580 ptr = va_arg (var_args, dbus_int32_t *);
1582 *ptr = dbus_message_iter_get_int32 (iter);
1585 case DBUS_TYPE_UINT32:
1589 ptr = va_arg (var_args, dbus_uint32_t *);
1591 *ptr = dbus_message_iter_get_uint32 (iter);
1594 #ifdef DBUS_HAVE_INT64
1595 case DBUS_TYPE_INT64:
1599 ptr = va_arg (var_args, dbus_int64_t *);
1601 *ptr = dbus_message_iter_get_int64 (iter);
1604 case DBUS_TYPE_UINT64:
1608 ptr = va_arg (var_args, dbus_uint64_t *);
1610 *ptr = dbus_message_iter_get_uint64 (iter);
1613 #endif /* DBUS_HAVE_INT64 */
1615 case DBUS_TYPE_DOUBLE:
1619 ptr = va_arg (var_args, double *);
1621 *ptr = dbus_message_iter_get_double (iter);
1625 case DBUS_TYPE_STRING:
1629 ptr = va_arg (var_args, char **);
1631 *ptr = dbus_message_iter_get_string (iter);
1635 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1642 case DBUS_TYPE_NAMED:
1645 unsigned char **data;
1648 name = va_arg (var_args, char **);
1649 data = va_arg (var_args, unsigned char **);
1650 len = va_arg (var_args, int *);
1652 if (!dbus_message_iter_get_named (iter, name, data, len))
1654 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1659 case DBUS_TYPE_ARRAY:
1664 type = va_arg (var_args, int);
1665 data = va_arg (var_args, void *);
1666 len = va_arg (var_args, int *);
1668 if (dbus_message_iter_get_array_type (iter) != type)
1670 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1671 "Argument %d is specified to be of type \"array of %s\", but "
1672 "is actually of type \"array of %s\"\n", i,
1673 _dbus_type_to_string (type),
1674 _dbus_type_to_string (dbus_message_iter_get_array_type (iter)));
1680 case DBUS_TYPE_BYTE:
1681 if (!dbus_message_iter_get_byte_array (iter, (unsigned char **)data, len))
1683 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1687 case DBUS_TYPE_BOOLEAN:
1688 if (!dbus_message_iter_get_boolean_array (iter, (unsigned char **)data, len))
1690 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1694 case DBUS_TYPE_INT32:
1695 if (!dbus_message_iter_get_int32_array (iter, (dbus_int32_t **)data, len))
1697 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1701 case DBUS_TYPE_UINT32:
1702 if (!dbus_message_iter_get_uint32_array (iter, (dbus_uint32_t **)data, len))
1704 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1708 #ifdef DBUS_HAVE_INT64
1709 case DBUS_TYPE_INT64:
1710 if (!dbus_message_iter_get_int64_array (iter, (dbus_int64_t **)data, len))
1712 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1716 case DBUS_TYPE_UINT64:
1717 if (!dbus_message_iter_get_uint64_array (iter, (dbus_uint64_t **)data, len))
1719 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1723 #endif /* DBUS_HAVE_INT64 */
1724 case DBUS_TYPE_DOUBLE:
1725 if (!dbus_message_iter_get_double_array (iter, (double **)data, len))
1727 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1731 case DBUS_TYPE_STRING:
1732 if (!dbus_message_iter_get_string_array (iter, (char ***)data, len))
1734 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1739 case DBUS_TYPE_ARRAY:
1740 case DBUS_TYPE_NAMED:
1741 case DBUS_TYPE_DICT:
1742 _dbus_warn ("dbus_message_get_args_valist doesn't support recursive arrays\n");
1743 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1746 _dbus_warn ("Unknown field type %d\n", type);
1747 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1752 case DBUS_TYPE_DICT:
1753 _dbus_warn ("dbus_message_get_args_valist doesn't support dicts\n");
1754 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1757 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1758 _dbus_warn ("Unknown field type %d\n", spec_type);
1762 spec_type = va_arg (var_args, int);
1763 if (spec_type != 0 && !dbus_message_iter_next (iter))
1765 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1766 "Message has only %d arguments, but more were expected", i);
1782 * Initializes a DBusMessageIter representing the arguments of the
1783 * message passed in.
1785 * @param message the message
1786 * @param iter pointer to an iterator to initialize
1789 dbus_message_iter_init (DBusMessage *message,
1790 DBusMessageIter *iter)
1792 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1794 _dbus_return_if_fail (message != NULL);
1795 _dbus_return_if_fail (iter != NULL);
1797 _dbus_assert (sizeof (DBusMessageRealIter) <= sizeof (DBusMessageIter));
1799 real->message = message;
1800 real->parent_iter = NULL;
1801 real->changed_stamp = message->changed_stamp;
1803 real->type = DBUS_MESSAGE_ITER_TYPE_MESSAGE;
1805 real->end = _dbus_string_get_length (&message->body);
1807 real->container_start = 0;
1808 real->container_length_pos = 0;
1809 real->wrote_dict_key = 0;
1810 real->array_type_pos = 0;
1813 #ifndef DBUS_DISABLE_CHECKS
1815 dbus_message_iter_check (DBusMessageRealIter *iter)
1819 _dbus_warn ("dbus iterator check failed: iterator is NULL\n");
1823 if (iter->changed_stamp != iter->message->changed_stamp)
1825 _dbus_warn ("dbus iterator check failed: invalid iterator, must re-initialize it after modifying the message\n");
1829 if (iter->pos < 0 || iter->pos > iter->end)
1831 _dbus_warn ("dbus iterator check failed: invalid position\n");
1837 #endif /* DBUS_DISABLE_CHECKS */
1840 skip_array_type (DBusMessageRealIter *iter, int pos)
1846 data = _dbus_string_get_const_data_len (&iter->message->body,
1849 while (*data == DBUS_TYPE_ARRAY);
1855 dbus_message_iter_get_data_start (DBusMessageRealIter *iter, int *type)
1862 case DBUS_MESSAGE_ITER_TYPE_MESSAGE:
1863 data = _dbus_string_get_const_data_len (&iter->message->body,
1865 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1868 *type = DBUS_TYPE_INVALID;
1870 return skip_array_type (iter, iter->pos);
1872 case DBUS_MESSAGE_ITER_TYPE_ARRAY:
1873 data = _dbus_string_get_const_data_len (&iter->message->body,
1874 iter->array_type_pos, 1);
1875 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1878 *type = DBUS_TYPE_INVALID;
1882 case DBUS_MESSAGE_ITER_TYPE_DICT:
1883 /* Get the length of the string */
1884 len = _dbus_demarshal_uint32 (&iter->message->body,
1885 iter->message->byte_order,
1887 pos = pos + len + 1;
1889 data = _dbus_string_get_const_data_len (&iter->message->body,
1891 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1894 *type = DBUS_TYPE_INVALID;
1896 return skip_array_type (iter, pos);
1899 _dbus_assert_not_reached ("Invalid iter type");
1902 *type = DBUS_TYPE_INVALID;
1908 * Checks if an iterator has any more fields.
1910 * @param iter the message iter
1911 * @returns #TRUE if there are more fields
1915 dbus_message_iter_has_next (DBusMessageIter *iter)
1917 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1921 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
1923 if (real->pos >= real->end)
1926 pos = dbus_message_iter_get_data_start (real, &type);
1928 if (!_dbus_marshal_get_arg_end_pos (&real->message->body,
1929 real->message->byte_order,
1930 type, pos, &end_pos))
1933 if (end_pos >= real->end)
1940 * Moves the iterator to the next field.
1942 * @param iter The message iter
1943 * @returns #TRUE if the iterator was moved to the next field
1946 dbus_message_iter_next (DBusMessageIter *iter)
1948 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1952 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
1954 pos = dbus_message_iter_get_data_start (real, &type);
1956 if (!_dbus_marshal_get_arg_end_pos (&real->message->body,
1957 real->message->byte_order,
1958 type, pos, &end_pos))
1961 if (end_pos >= real->end)
1964 real->pos = end_pos;
1970 * Returns the argument type of the argument that the
1971 * message iterator points at.
1973 * @param iter the message iter
1974 * @returns the field type
1977 dbus_message_iter_get_arg_type (DBusMessageIter *iter)
1979 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1982 _dbus_return_val_if_fail (dbus_message_iter_check (real), DBUS_TYPE_INVALID);
1984 if (real->pos >= real->end)
1985 return DBUS_TYPE_INVALID;
1987 pos = dbus_message_iter_get_data_start (real, &type);
1993 iter_get_array_type (DBusMessageRealIter *iter, int *array_type_pos)
1996 int _array_type_pos;
2001 case DBUS_MESSAGE_ITER_TYPE_MESSAGE:
2002 _array_type_pos = iter->pos + 1;
2004 case DBUS_MESSAGE_ITER_TYPE_ARRAY:
2005 _array_type_pos = iter->array_type_pos + 1;
2007 case DBUS_MESSAGE_ITER_TYPE_DICT:
2008 /* Get the length of the string */
2009 len = _dbus_demarshal_uint32 (&iter->message->body,
2010 iter->message->byte_order,
2012 pos = pos + len + 1;
2013 data = _dbus_string_get_const_data_len (&iter->message->body,
2015 _array_type_pos = pos + 1;
2018 _dbus_assert_not_reached ("wrong iter type");
2019 return DBUS_TYPE_INVALID;
2022 if (array_type_pos != NULL)
2023 *array_type_pos = _array_type_pos;
2025 data = _dbus_string_get_const_data_len (&iter->message->body,
2026 _array_type_pos, 1);
2027 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
2030 return DBUS_TYPE_INVALID;
2035 * Returns the element type of the array that the
2036 * message iterator points at. Note that you need
2037 * to check that the iterator points to an array
2038 * prior to using this function.
2040 * @param iter the message iter
2041 * @returns the field type
2044 dbus_message_iter_get_array_type (DBusMessageIter *iter)
2046 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2049 _dbus_return_val_if_fail (dbus_message_iter_check (real), DBUS_TYPE_INVALID);
2051 if (real->pos >= real->end)
2052 return DBUS_TYPE_INVALID;
2054 pos = dbus_message_iter_get_data_start (real, &type);
2056 _dbus_assert (type == DBUS_TYPE_ARRAY);
2058 return iter_get_array_type (real, NULL);
2063 * Returns the string value that an iterator may point to.
2064 * Note that you need to check that the iterator points to
2065 * a string value before using this function.
2067 * @see dbus_message_iter_get_arg_type
2068 * @param iter the message iter
2069 * @returns the string
2072 dbus_message_iter_get_string (DBusMessageIter *iter)
2074 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2077 _dbus_return_val_if_fail (dbus_message_iter_check (real), NULL);
2079 pos = dbus_message_iter_get_data_start (real, &type);
2081 _dbus_assert (type == DBUS_TYPE_STRING);
2083 return _dbus_demarshal_string (&real->message->body, real->message->byte_order,
2088 * Returns the name and data from a named type that an
2089 * iterator may point to. Note that you need to check that
2090 * the iterator points to a named type before using this
2093 * @see dbus_message_iter_get_arg_type
2094 * @param iter the message iter
2095 * @param name return location for the name
2096 * @param value return location for data
2097 * @param len return location for length of data
2098 * @returns TRUE if get succeed
2102 dbus_message_iter_get_named (DBusMessageIter *iter,
2104 unsigned char **value,
2107 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2111 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2113 pos = dbus_message_iter_get_data_start (real, &type);
2115 _dbus_assert (type == DBUS_TYPE_NAMED);
2117 _name = _dbus_demarshal_string (&real->message->body, real->message->byte_order,
2123 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
2124 pos + 1, NULL, value, len))
2136 * Returns the byte value that an iterator may point to.
2137 * Note that you need to check that the iterator points to
2138 * a byte value before using this function.
2140 * @see dbus_message_iter_get_arg_type
2141 * @param iter the message iter
2142 * @returns the byte value
2145 dbus_message_iter_get_byte (DBusMessageIter *iter)
2147 unsigned char value;
2148 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2151 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0);
2153 pos = dbus_message_iter_get_data_start (real, &type);
2155 _dbus_assert (type == DBUS_TYPE_BYTE);
2157 value = _dbus_string_get_byte (&real->message->body, pos);
2164 * Returns the boolean value that an iterator may point to.
2165 * Note that you need to check that the iterator points to
2166 * a boolean value before using this function.
2168 * @see dbus_message_iter_get_arg_type
2169 * @param iter the message iter
2170 * @returns the boolean value
2173 dbus_message_iter_get_boolean (DBusMessageIter *iter)
2175 unsigned char value;
2176 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2179 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2181 pos = dbus_message_iter_get_data_start (real, &type);
2183 _dbus_assert (type == DBUS_TYPE_BOOLEAN);
2185 value = _dbus_string_get_byte (&real->message->body, pos);
2191 * Returns the 32 bit signed integer value that an iterator may point to.
2192 * Note that you need to check that the iterator points to
2193 * a 32-bit integer value before using this function.
2195 * @see dbus_message_iter_get_arg_type
2196 * @param iter the message iter
2197 * @returns the integer
2200 dbus_message_iter_get_int32 (DBusMessageIter *iter)
2202 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2205 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0);
2207 pos = dbus_message_iter_get_data_start (real, &type);
2209 _dbus_assert (type == DBUS_TYPE_INT32);
2211 return _dbus_demarshal_int32 (&real->message->body, real->message->byte_order,
2216 * Returns the 32 bit unsigned integer value that an iterator may point to.
2217 * Note that you need to check that the iterator points to
2218 * a 32-bit unsigned integer value before using this function.
2220 * @see dbus_message_iter_get_arg_type
2221 * @param iter the message iter
2222 * @returns the integer
2225 dbus_message_iter_get_uint32 (DBusMessageIter *iter)
2227 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2230 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0);
2232 pos = dbus_message_iter_get_data_start (real, &type);
2234 _dbus_assert (type == DBUS_TYPE_UINT32);
2236 return _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
2240 #ifdef DBUS_HAVE_INT64
2243 * Returns the 64 bit signed integer value that an iterator may point
2244 * to. Note that you need to check that the iterator points to a
2245 * 64-bit integer value before using this function.
2247 * This function only exists if #DBUS_HAVE_INT64 is defined.
2249 * @see dbus_message_iter_get_arg_type
2250 * @param iter the message iter
2251 * @returns the integer
2254 dbus_message_iter_get_int64 (DBusMessageIter *iter)
2256 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2259 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0);
2261 pos = dbus_message_iter_get_data_start (real, &type);
2263 _dbus_assert (type == DBUS_TYPE_INT64);
2265 return _dbus_demarshal_int64 (&real->message->body, real->message->byte_order,
2270 * Returns the 64 bit unsigned integer value that an iterator may point to.
2271 * Note that you need to check that the iterator points to
2272 * a 64-bit unsigned integer value before using this function.
2274 * This function only exists if #DBUS_HAVE_INT64 is defined.
2276 * @see dbus_message_iter_get_arg_type
2277 * @param iter the message iter
2278 * @returns the integer
2281 dbus_message_iter_get_uint64 (DBusMessageIter *iter)
2283 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2286 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0);
2288 pos = dbus_message_iter_get_data_start (real, &type);
2290 _dbus_assert (type == DBUS_TYPE_UINT64);
2292 return _dbus_demarshal_uint64 (&real->message->body, real->message->byte_order,
2296 #endif /* DBUS_HAVE_INT64 */
2299 * Returns the double value that an iterator may point to.
2300 * Note that you need to check that the iterator points to
2301 * a string value before using this function.
2303 * @see dbus_message_iter_get_arg_type
2304 * @param iter the message iter
2305 * @returns the double
2308 dbus_message_iter_get_double (DBusMessageIter *iter)
2310 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2313 _dbus_return_val_if_fail (dbus_message_iter_check (real), 0.0);
2315 pos = dbus_message_iter_get_data_start (real, &type);
2317 _dbus_assert (type == DBUS_TYPE_DOUBLE);
2319 return _dbus_demarshal_double (&real->message->body, real->message->byte_order,
2324 * Initializes an iterator for the array that the iterator
2325 * may point to. Note that you need to check that the iterator
2326 * points to an array prior to using this function.
2328 * The array element type is returned in array_type, and the array
2329 * iterator can only be used to get that type of data.
2331 * @param iter the iterator
2332 * @param array_iter pointer to an iterator to initialize
2333 * @param array_type gets set to the type of the array elements
2334 * @returns #TRUE on success
2337 dbus_message_iter_init_array_iterator (DBusMessageIter *iter,
2338 DBusMessageIter *array_iter,
2341 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2342 DBusMessageRealIter *array_real = (DBusMessageRealIter *)array_iter;
2343 int type, pos, len_pos, len, array_type_pos;
2346 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2348 pos = dbus_message_iter_get_data_start (real, &type);
2350 _dbus_assert (type == DBUS_TYPE_ARRAY);
2352 _array_type = iter_get_array_type (real, &array_type_pos);
2354 len_pos = _DBUS_ALIGN_VALUE (pos, sizeof (dbus_uint32_t));
2355 len = _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
2358 array_real->parent_iter = real;
2359 array_real->message = real->message;
2360 array_real->changed_stamp = real->message->changed_stamp;
2362 array_real->type = DBUS_MESSAGE_ITER_TYPE_ARRAY;
2363 array_real->pos = pos;
2364 array_real->end = pos + len;
2366 array_real->container_start = pos;
2367 array_real->container_length_pos = len_pos;
2368 array_real->wrote_dict_key = 0;
2369 array_real->array_type_pos = array_type_pos;
2370 array_real->array_type_done = TRUE;
2372 if (array_type != NULL)
2373 *array_type = _array_type;
2380 * Initializes an iterator for the dict that the iterator
2381 * may point to. Note that you need to check that the iterator
2382 * points to a dict prior to using this function.
2384 * @param iter the iterator
2385 * @param dict_iter pointer to an iterator to initialize
2386 * @returns #TRUE on success
2389 dbus_message_iter_init_dict_iterator (DBusMessageIter *iter,
2390 DBusMessageIter *dict_iter)
2392 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2393 DBusMessageRealIter *dict_real = (DBusMessageRealIter *)dict_iter;
2394 int type, pos, len_pos, len;
2396 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2398 pos = dbus_message_iter_get_data_start (real, &type);
2400 _dbus_assert (type == DBUS_TYPE_DICT);
2402 len_pos = _DBUS_ALIGN_VALUE (pos, sizeof (dbus_uint32_t));
2403 len = _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
2406 dict_real->parent_iter = real;
2407 dict_real->message = real->message;
2408 dict_real->changed_stamp = real->message->changed_stamp;
2410 dict_real->type = DBUS_MESSAGE_ITER_TYPE_DICT;
2411 dict_real->pos = pos;
2412 dict_real->end = pos + len;
2414 dict_real->container_start = pos;
2415 dict_real->container_length_pos = len_pos;
2416 dict_real->wrote_dict_key = 0;
2422 * Returns the byte array that the iterator may point to.
2423 * Note that you need to check that the iterator points
2424 * to a byte array prior to using this function.
2426 * @param iter the iterator
2427 * @param value return location for array values
2428 * @param len return location for length of byte array
2429 * @returns #TRUE on success
2432 dbus_message_iter_get_byte_array (DBusMessageIter *iter,
2433 unsigned char **value,
2436 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2439 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2441 pos = dbus_message_iter_get_data_start (real, &type);
2443 _dbus_assert (type == DBUS_TYPE_ARRAY);
2445 type = iter_get_array_type (real, NULL);
2447 _dbus_assert (type == DBUS_TYPE_BYTE);
2449 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
2450 pos, NULL, value, len))
2457 * Returns the boolean array that the iterator may point to. Note that
2458 * you need to check that the iterator points to an array of the
2459 * correct type prior to using this function.
2461 * @param iter the iterator
2462 * @param value return location for the array
2463 * @param len return location for the array length
2464 * @returns #TRUE on success
2467 dbus_message_iter_get_boolean_array (DBusMessageIter *iter,
2468 unsigned char **value,
2471 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2474 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2476 pos = dbus_message_iter_get_data_start (real, &type);
2478 _dbus_assert (type == DBUS_TYPE_ARRAY);
2480 type = iter_get_array_type (real, NULL);
2482 _dbus_assert (type == DBUS_TYPE_BOOLEAN);
2484 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
2485 pos, NULL, value, len))
2492 * Returns the 32 bit signed integer array that the iterator may point
2493 * to. Note that you need to check that the iterator points to an
2494 * array of the correct type prior to using this function.
2496 * @param iter the iterator
2497 * @param value return location for the array
2498 * @param len return location for the array length
2499 * @returns #TRUE on success
2502 dbus_message_iter_get_int32_array (DBusMessageIter *iter,
2503 dbus_int32_t **value,
2506 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2509 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2511 pos = dbus_message_iter_get_data_start (real, &type);
2513 _dbus_assert (type == DBUS_TYPE_ARRAY);
2515 type = iter_get_array_type (real, NULL);
2517 _dbus_assert (type == DBUS_TYPE_INT32);
2519 if (!_dbus_demarshal_int32_array (&real->message->body, real->message->byte_order,
2520 pos, NULL, value, len))
2527 * Returns the 32 bit unsigned integer array that the iterator may point
2528 * to. Note that you need to check that the iterator points to an
2529 * array of the correct type prior to using this function.
2531 * @param iter the iterator
2532 * @param value return location for the array
2533 * @param len return location for the array length
2534 * @returns #TRUE on success
2537 dbus_message_iter_get_uint32_array (DBusMessageIter *iter,
2538 dbus_uint32_t **value,
2541 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2544 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2546 pos = dbus_message_iter_get_data_start (real, &type);
2548 _dbus_assert (type == DBUS_TYPE_ARRAY);
2550 type = iter_get_array_type (real, NULL);
2551 _dbus_assert (type == DBUS_TYPE_UINT32);
2553 if (!_dbus_demarshal_uint32_array (&real->message->body, real->message->byte_order,
2554 pos, NULL, value, len))
2560 #ifdef DBUS_HAVE_INT64
2563 * Returns the 64 bit signed integer array that the iterator may point
2564 * to. Note that you need to check that the iterator points to an
2565 * array of the correct type prior to using this function.
2567 * This function only exists if #DBUS_HAVE_INT64 is defined.
2569 * @param iter the iterator
2570 * @param value return location for the array
2571 * @param len return location for the array length
2572 * @returns #TRUE on success
2575 dbus_message_iter_get_int64_array (DBusMessageIter *iter,
2576 dbus_int64_t **value,
2579 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2582 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2584 pos = dbus_message_iter_get_data_start (real, &type);
2586 _dbus_assert (type == DBUS_TYPE_ARRAY);
2588 type = iter_get_array_type (real, NULL);
2590 _dbus_assert (type == DBUS_TYPE_INT64);
2592 if (!_dbus_demarshal_int64_array (&real->message->body, real->message->byte_order,
2593 pos, NULL, value, len))
2600 * Returns the 64 bit unsigned integer array that the iterator may point
2601 * to. Note that you need to check that the iterator points to an
2602 * array of the correct type prior to using this function.
2604 * This function only exists if #DBUS_HAVE_INT64 is defined.
2606 * @param iter the iterator
2607 * @param value return location for the array
2608 * @param len return location for the array length
2609 * @returns #TRUE on success
2612 dbus_message_iter_get_uint64_array (DBusMessageIter *iter,
2613 dbus_uint64_t **value,
2616 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2619 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2621 pos = dbus_message_iter_get_data_start (real, &type);
2623 _dbus_assert (type == DBUS_TYPE_ARRAY);
2625 type = iter_get_array_type (real, NULL);
2626 _dbus_assert (type == DBUS_TYPE_UINT64);
2628 if (!_dbus_demarshal_uint64_array (&real->message->body, real->message->byte_order,
2629 pos, NULL, value, len))
2635 #endif /* DBUS_HAVE_INT64 */
2638 * Returns the double array that the iterator may point to. Note that
2639 * you need to check that the iterator points to an array of the
2640 * correct type prior to using this function.
2642 * @param iter the iterator
2643 * @param value return location for the array
2644 * @param len return location for the array length
2645 * @returns #TRUE on success
2648 dbus_message_iter_get_double_array (DBusMessageIter *iter,
2652 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2655 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2657 pos = dbus_message_iter_get_data_start (real, &type);
2659 _dbus_assert (type == DBUS_TYPE_ARRAY);
2661 type = iter_get_array_type (real, NULL);
2662 _dbus_assert (type == DBUS_TYPE_DOUBLE);
2664 if (!_dbus_demarshal_double_array (&real->message->body, real->message->byte_order,
2665 pos, NULL, value, len))
2672 * Returns the string array that the iterator may point to.
2673 * Note that you need to check that the iterator points
2674 * to a byte array prior to using this function.
2676 * The returned value is a #NULL-terminated array of strings.
2677 * Each string is a separate malloc block, and the array
2678 * itself is a malloc block. You can free this type of
2679 * string array with dbus_free_string_array().
2681 * @param iter the iterator
2682 * @param value return location for string values
2683 * @param len return location for length of byte array
2684 * @returns #TRUE on success
2687 dbus_message_iter_get_string_array (DBusMessageIter *iter,
2691 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2694 _dbus_return_val_if_fail (dbus_message_iter_check (real), FALSE);
2696 pos = dbus_message_iter_get_data_start (real, &type);
2698 _dbus_assert (type == DBUS_TYPE_ARRAY);
2700 type = iter_get_array_type (real, NULL);
2701 _dbus_assert (type == DBUS_TYPE_STRING);
2703 if (!_dbus_demarshal_string_array (&real->message->body, real->message->byte_order,
2704 pos, NULL, value, len))
2711 * Returns the key name fot the dict entry that an iterator
2712 * may point to. Note that you need to check that the iterator
2713 * points to a dict entry before using this function.
2715 * @see dbus_message_iter_init_dict_iterator
2716 * @param iter the message iter
2717 * @returns the key name
2720 dbus_message_iter_get_dict_key (DBusMessageIter *iter)
2722 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2724 _dbus_return_val_if_fail (dbus_message_iter_check (real), NULL);
2726 _dbus_assert (real->type == DBUS_MESSAGE_ITER_TYPE_DICT);
2728 return _dbus_demarshal_string (&real->message->body, real->message->byte_order,
2733 * Initializes a DBusMessageIter pointing to the end of the
2734 * message. This iterator can be used to append data to the
2737 * @param message the message
2738 * @param iter pointer to an iterator to initialize
2741 dbus_message_append_iter_init (DBusMessage *message,
2742 DBusMessageIter *iter)
2744 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2746 _dbus_return_if_fail (message != NULL);
2747 _dbus_return_if_fail (iter != NULL);
2749 real->message = message;
2750 real->parent_iter = NULL;
2751 real->changed_stamp = message->changed_stamp;
2753 real->type = DBUS_MESSAGE_ITER_TYPE_MESSAGE;
2754 real->end = _dbus_string_get_length (&real->message->body);
2755 real->pos = real->end;
2757 real->container_length_pos = 0;
2758 real->wrote_dict_key = 0;
2761 #ifndef DBUS_DISABLE_CHECKS
2763 dbus_message_iter_append_check (DBusMessageRealIter *iter)
2767 _dbus_warn ("dbus iterator check failed: NULL iterator\n");
2771 if (iter->message->locked)
2773 _dbus_warn ("dbus iterator check failed: message is locked (has already been sent)\n");
2777 if (iter->changed_stamp != iter->message->changed_stamp)
2779 _dbus_warn ("dbus iterator check failed: invalid iterator, must re-initialize it after modifying the message");
2783 if (iter->pos != iter->end)
2785 _dbus_warn ("dbus iterator check failed: can only append at end of message");
2789 if (iter->pos != _dbus_string_get_length (&iter->message->body))
2791 _dbus_warn ("dbus iterator check failed: append pos not at end of message string");
2797 #endif /* DBUS_DISABLE_CHECKS */
2800 dbus_message_iter_append_type (DBusMessageRealIter *iter,
2806 case DBUS_MESSAGE_ITER_TYPE_MESSAGE:
2807 if (!_dbus_string_append_byte (&iter->message->body, type))
2811 case DBUS_MESSAGE_ITER_TYPE_ARRAY:
2812 data = _dbus_string_get_const_data_len (&iter->message->body,
2813 iter->array_type_pos, 1);
2816 _dbus_warn ("Appended element of wrong type for array\n");
2821 case DBUS_MESSAGE_ITER_TYPE_DICT:
2822 if (!iter->wrote_dict_key)
2824 _dbus_warn ("Appending dict data before key name\n");
2828 if (!_dbus_string_append_byte (&iter->message->body, type))
2834 _dbus_assert_not_reached ("Invalid iter type");
2842 dbus_message_iter_update_after_change (DBusMessageRealIter *iter)
2844 iter->changed_stamp = iter->message->changed_stamp;
2846 /* Set new end of iter */
2847 iter->end = _dbus_string_get_length (&iter->message->body);
2848 iter->pos = iter->end;
2850 /* Set container length */
2851 if (iter->type == DBUS_MESSAGE_ITER_TYPE_DICT ||
2852 (iter->type == DBUS_MESSAGE_ITER_TYPE_ARRAY && iter->array_type_done))
2853 _dbus_marshal_set_uint32 (&iter->message->body,
2854 iter->message->byte_order,
2855 iter->container_length_pos,
2856 iter->end - iter->container_start);
2858 if (iter->parent_iter)
2859 dbus_message_iter_update_after_change (iter->parent_iter);
2863 dbus_message_iter_append_done (DBusMessageRealIter *iter)
2865 iter->message->changed_stamp++;
2866 dbus_message_iter_update_after_change (iter);
2867 iter->wrote_dict_key = FALSE;
2871 * Appends a nil value to the message
2873 * @param iter an iterator pointing to the end of the message
2874 * @returns #TRUE on success
2877 dbus_message_iter_append_nil (DBusMessageIter *iter)
2879 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2881 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
2883 if (!dbus_message_iter_append_type (real, DBUS_TYPE_NIL))
2886 dbus_message_iter_append_done (real);
2892 * Appends a boolean value to the message
2894 * @param iter an iterator pointing to the end of the message
2895 * @param value the boolean value
2896 * @returns #TRUE on success
2899 dbus_message_iter_append_boolean (DBusMessageIter *iter,
2902 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2904 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
2906 if (!dbus_message_iter_append_type (real, DBUS_TYPE_BOOLEAN))
2909 if (!_dbus_string_append_byte (&real->message->body, (value != FALSE)))
2911 _dbus_string_set_length (&real->message->body, real->pos);
2915 dbus_message_iter_append_done (real);
2921 * Appends a byte to the message
2923 * @param iter an iterator pointing to the end of the message
2924 * @param value the byte value
2925 * @returns #TRUE on success
2928 dbus_message_iter_append_byte (DBusMessageIter *iter,
2929 unsigned char value)
2931 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2933 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
2935 if (!dbus_message_iter_append_type (real, DBUS_TYPE_BYTE))
2938 if (!_dbus_string_append_byte (&real->message->body, value))
2940 _dbus_string_set_length (&real->message->body, real->pos);
2944 dbus_message_iter_append_done (real);
2951 * Appends a 32 bit signed integer to the message.
2953 * @param iter an iterator pointing to the end of the message
2954 * @param value the integer value
2955 * @returns #TRUE on success
2958 dbus_message_iter_append_int32 (DBusMessageIter *iter,
2961 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2963 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
2965 if (!dbus_message_iter_append_type (real, DBUS_TYPE_INT32))
2968 if (!_dbus_marshal_int32 (&real->message->body, real->message->byte_order, value))
2970 _dbus_string_set_length (&real->message->body, real->pos);
2974 dbus_message_iter_append_done (real);
2980 * Appends a 32 bit unsigned integer to the message.
2982 * @param iter an iterator pointing to the end of the message
2983 * @param value the integer value
2984 * @returns #TRUE on success
2987 dbus_message_iter_append_uint32 (DBusMessageIter *iter,
2988 dbus_uint32_t value)
2990 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2992 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
2994 if (!dbus_message_iter_append_type (real, DBUS_TYPE_UINT32))
2997 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, value))
2999 _dbus_string_set_length (&real->message->body, real->pos);
3003 dbus_message_iter_append_done (real);
3008 #ifdef DBUS_HAVE_INT64
3011 * Appends a 64 bit signed integer to the message.
3013 * This function only exists if #DBUS_HAVE_INT64 is defined.
3015 * @param iter an iterator pointing to the end of the message
3016 * @param value the integer value
3017 * @returns #TRUE on success
3020 dbus_message_iter_append_int64 (DBusMessageIter *iter,
3023 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3025 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3027 if (!dbus_message_iter_append_type (real, DBUS_TYPE_INT64))
3030 if (!_dbus_marshal_int64 (&real->message->body, real->message->byte_order, value))
3032 _dbus_string_set_length (&real->message->body, real->pos);
3036 dbus_message_iter_append_done (real);
3042 * Appends a 64 bit unsigned integer to the message.
3044 * This function only exists if #DBUS_HAVE_INT64 is defined.
3046 * @param iter an iterator pointing to the end of the message
3047 * @param value the integer value
3048 * @returns #TRUE on success
3051 dbus_message_iter_append_uint64 (DBusMessageIter *iter,
3052 dbus_uint64_t value)
3054 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3056 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3058 if (!dbus_message_iter_append_type (real, DBUS_TYPE_UINT64))
3061 if (!_dbus_marshal_uint64 (&real->message->body, real->message->byte_order, value))
3063 _dbus_string_set_length (&real->message->body, real->pos);
3067 dbus_message_iter_append_done (real);
3072 #endif /* DBUS_HAVE_INT64 */
3075 * Appends a double value to the message.
3077 * @param iter an iterator pointing to the end of the message
3078 * @param value the double value
3079 * @returns #TRUE on success
3082 dbus_message_iter_append_double (DBusMessageIter *iter,
3085 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3087 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3089 if (!dbus_message_iter_append_type (real, DBUS_TYPE_DOUBLE))
3092 if (!_dbus_marshal_double (&real->message->body, real->message->byte_order, value))
3094 _dbus_string_set_length (&real->message->body, real->pos);
3098 dbus_message_iter_append_done (real);
3104 * Appends a UTF-8 string to the message.
3106 * @param iter an iterator pointing to the end of the message
3107 * @param value the string
3108 * @returns #TRUE on success
3111 dbus_message_iter_append_string (DBusMessageIter *iter,
3114 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3116 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3118 if (!dbus_message_iter_append_type (real, DBUS_TYPE_STRING))
3121 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, value))
3123 _dbus_string_set_length (&real->message->body, real->pos);
3127 dbus_message_iter_append_done (real);
3133 * Appends a named type data chunk to the message. A named
3134 * type is simply an arbitrary UTF-8 string used as a type
3135 * tag, plus an array of arbitrary bytes to be interpreted
3136 * according to the type tag.
3138 * @param iter an iterator pointing to the end of the message
3139 * @param name the name of the type
3140 * @param data the binary data used to store the value
3141 * @param len the length of the binary data in bytes
3142 * @returns #TRUE on success
3145 dbus_message_iter_append_named (DBusMessageIter *iter,
3147 const unsigned char *data,
3150 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3152 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3154 if (!dbus_message_iter_append_type (real, DBUS_TYPE_NAMED))
3157 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, name))
3159 _dbus_string_set_length (&real->message->body, real->pos);
3163 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, data, len))
3165 _dbus_string_set_length (&real->message->body, real->pos);
3169 dbus_message_iter_append_done (real);
3176 * Appends a dict key name to the message. The iterator used
3177 * must point to a dict.
3179 * @param iter an iterator pointing to the end of the message
3180 * @param value the string
3181 * @returns #TRUE on success
3184 dbus_message_iter_append_dict_key (DBusMessageIter *iter,
3187 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3189 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3190 _dbus_assert (real->type == DBUS_MESSAGE_ITER_TYPE_DICT);
3192 if (real->wrote_dict_key)
3194 _dbus_warn ("Appendinging multiple dict key names\n");
3198 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, value))
3203 dbus_message_iter_append_done (real);
3204 real->wrote_dict_key = TRUE;
3210 array_iter_type_mark_done (DBusMessageRealIter *iter)
3214 if (iter->type == DBUS_MESSAGE_ITER_TYPE_ARRAY)
3215 array_iter_type_mark_done (iter->parent_iter);
3219 len_pos = _DBUS_ALIGN_VALUE (_dbus_string_get_length (&iter->message->body),
3220 sizeof (dbus_uint32_t));
3222 /* Empty length for now, backfill later */
3223 if (!_dbus_marshal_uint32 (&iter->message->body, iter->message->byte_order, 0))
3225 _dbus_string_set_length (&iter->message->body, iter->pos);
3229 iter->container_start = _dbus_string_get_length (&iter->message->body);
3230 iter->container_length_pos = len_pos;
3231 iter->array_type_done = TRUE;
3237 append_array_type (DBusMessageRealIter *real,
3239 dbus_bool_t *array_type_done,
3240 int *array_type_pos)
3242 int existing_element_type;
3244 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
3247 if (real->type == DBUS_MESSAGE_ITER_TYPE_ARRAY &&
3248 real->array_type_done)
3250 existing_element_type = iter_get_array_type (real, array_type_pos);
3251 if (existing_element_type != element_type)
3253 _dbus_warn ("Appending array of %s, when expecting array of %s\n",
3254 _dbus_type_to_string (element_type),
3255 _dbus_type_to_string (existing_element_type));
3256 _dbus_string_set_length (&real->message->body, real->pos);
3259 if (array_type_done != NULL)
3260 *array_type_done = TRUE;
3264 if (array_type_pos != NULL)
3265 *array_type_pos = _dbus_string_get_length (&real->message->body);
3267 /* Append element type */
3268 if (!_dbus_string_append_byte (&real->message->body, element_type))
3270 _dbus_string_set_length (&real->message->body, real->pos);
3274 if (array_type_done != NULL)
3275 *array_type_done = element_type != DBUS_TYPE_ARRAY;
3277 if (element_type != DBUS_TYPE_ARRAY &&
3278 !array_iter_type_mark_done (real))
3286 * Appends an array to the message and initializes an iterator that
3287 * can be used to append to the array.
3289 * @param iter an iterator pointing to the end of the message
3290 * @param array_iter pointer to an iter that will be initialized
3291 * @param element_type the type of the array elements
3292 * @returns #TRUE on success
3295 dbus_message_iter_append_array (DBusMessageIter *iter,
3296 DBusMessageIter *array_iter,
3299 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3300 DBusMessageRealIter *array_real = (DBusMessageRealIter *)array_iter;
3303 dbus_bool_t array_type_done;
3305 if (element_type == DBUS_TYPE_NIL)
3307 _dbus_warn ("Can't create NIL arrays\n");
3311 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3313 if (!append_array_type (real, element_type, &array_type_done, &array_type_pos))
3316 len_pos = _DBUS_ALIGN_VALUE (_dbus_string_get_length (&real->message->body), sizeof (dbus_uint32_t));
3318 if (array_type_done)
3320 /* Empty length for now, backfill later */
3321 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, 0))
3323 _dbus_string_set_length (&real->message->body, real->pos);
3328 array_real->parent_iter = real;
3329 array_real->message = real->message;
3330 array_real->changed_stamp = real->message->changed_stamp;
3332 array_real->type = DBUS_MESSAGE_ITER_TYPE_ARRAY;
3333 array_real->pos = _dbus_string_get_length (&real->message->body);
3334 array_real->end = array_real->end;
3336 array_real->container_start = array_real->pos;
3337 array_real->container_length_pos = len_pos;
3338 array_real->wrote_dict_key = 0;
3339 array_real->array_type_done = array_type_done;
3340 array_real->array_type_pos = array_type_pos;
3342 dbus_message_iter_append_done (array_real);
3348 * Appends a dict to the message and initializes an iterator that
3349 * can be used to append to the dict.
3351 * @param iter an iterator pointing to the end of the message
3352 * @param dict_iter pointer to an iter that will be initialized
3353 * @returns #TRUE on success
3356 dbus_message_iter_append_dict (DBusMessageIter *iter,
3357 DBusMessageIter *dict_iter)
3359 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3360 DBusMessageRealIter *dict_real = (DBusMessageRealIter *)dict_iter;
3363 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3365 if (!dbus_message_iter_append_type (real, DBUS_TYPE_DICT))
3368 len_pos = _DBUS_ALIGN_VALUE (_dbus_string_get_length (&real->message->body), sizeof (dbus_uint32_t));
3370 /* Empty length for now, backfill later */
3371 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, 0))
3373 _dbus_string_set_length (&real->message->body, real->pos);
3377 dict_real->parent_iter = real;
3378 dict_real->message = real->message;
3379 dict_real->changed_stamp = real->message->changed_stamp;
3381 dict_real->type = DBUS_MESSAGE_ITER_TYPE_DICT;
3382 dict_real->pos = _dbus_string_get_length (&real->message->body);
3383 dict_real->end = dict_real->end;
3385 dict_real->container_start = dict_real->pos;
3386 dict_real->container_length_pos = len_pos;
3387 dict_real->wrote_dict_key = 0;
3389 dbus_message_iter_append_done (dict_real);
3396 * Appends a boolean array to the message.
3398 * @param iter an iterator pointing to the end of the message
3399 * @param value the array
3400 * @param len the length of the array
3401 * @returns #TRUE on success
3404 dbus_message_iter_append_boolean_array (DBusMessageIter *iter,
3405 unsigned const char *value,
3408 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3410 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3412 if (!append_array_type (real, DBUS_TYPE_BOOLEAN, NULL, NULL))
3415 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, value, len))
3417 _dbus_string_set_length (&real->message->body, real->pos);
3421 dbus_message_iter_append_done (real);
3427 * Appends a 32 bit signed integer array to the message.
3429 * @param iter an iterator pointing to the end of the message
3430 * @param value the array
3431 * @param len the length of the array
3432 * @returns #TRUE on success
3435 dbus_message_iter_append_int32_array (DBusMessageIter *iter,
3436 const dbus_int32_t *value,
3439 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3441 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3443 if (!append_array_type (real, DBUS_TYPE_INT32, NULL, NULL))
3446 if (!_dbus_marshal_int32_array (&real->message->body, real->message->byte_order, value, len))
3448 _dbus_string_set_length (&real->message->body, real->pos);
3452 dbus_message_iter_append_done (real);
3458 * Appends a 32 bit unsigned integer array to the message.
3460 * @param iter an iterator pointing to the end of the message
3461 * @param value the array
3462 * @param len the length of the array
3463 * @returns #TRUE on success
3466 dbus_message_iter_append_uint32_array (DBusMessageIter *iter,
3467 const dbus_uint32_t *value,
3470 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3472 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3474 if (!append_array_type (real, DBUS_TYPE_UINT32, NULL, NULL))
3477 if (!_dbus_marshal_uint32_array (&real->message->body, real->message->byte_order, value, len))
3479 _dbus_string_set_length (&real->message->body, real->pos);
3483 dbus_message_iter_append_done (real);
3488 #ifdef DBUS_HAVE_INT64
3491 * Appends a 64 bit signed integer array to the message.
3493 * This function only exists if #DBUS_HAVE_INT64 is defined.
3495 * @param iter an iterator pointing to the end of the message
3496 * @param value the array
3497 * @param len the length of the array
3498 * @returns #TRUE on success
3501 dbus_message_iter_append_int64_array (DBusMessageIter *iter,
3502 const dbus_int64_t *value,
3505 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3507 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3509 if (!append_array_type (real, DBUS_TYPE_INT64, NULL, NULL))
3512 if (!_dbus_marshal_int64_array (&real->message->body, real->message->byte_order, value, len))
3514 _dbus_string_set_length (&real->message->body, real->pos);
3518 dbus_message_iter_append_done (real);
3524 * Appends a 64 bit unsigned integer array to the message.
3526 * This function only exists if #DBUS_HAVE_INT64 is defined.
3528 * @param iter an iterator pointing to the end of the message
3529 * @param value the array
3530 * @param len the length of the array
3531 * @returns #TRUE on success
3534 dbus_message_iter_append_uint64_array (DBusMessageIter *iter,
3535 const dbus_uint64_t *value,
3538 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3540 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3542 if (!append_array_type (real, DBUS_TYPE_UINT64, NULL, NULL))
3545 if (!_dbus_marshal_uint64_array (&real->message->body, real->message->byte_order, value, len))
3547 _dbus_string_set_length (&real->message->body, real->pos);
3551 dbus_message_iter_append_done (real);
3555 #endif /* DBUS_HAVE_INT64 */
3558 * Appends a double array to the message.
3560 * @param iter an iterator pointing to the end of the message
3561 * @param value the array
3562 * @param len the length of the array
3563 * @returns #TRUE on success
3566 dbus_message_iter_append_double_array (DBusMessageIter *iter,
3567 const double *value,
3570 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3572 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3574 if (!append_array_type (real, DBUS_TYPE_DOUBLE, NULL, NULL))
3577 if (!_dbus_marshal_double_array (&real->message->body, real->message->byte_order, value, len))
3579 _dbus_string_set_length (&real->message->body, real->pos);
3583 dbus_message_iter_append_done (real);
3589 * Appends a byte array to the message.
3591 * @param iter an iterator pointing to the end of the message
3592 * @param value the array
3593 * @param len the length of the array
3594 * @returns #TRUE on success
3597 dbus_message_iter_append_byte_array (DBusMessageIter *iter,
3598 unsigned const char *value,
3601 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3603 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3605 if (!append_array_type (real, DBUS_TYPE_BYTE, NULL, NULL))
3608 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, value, len))
3610 _dbus_string_set_length (&real->message->body, real->pos);
3614 dbus_message_iter_append_done (real);
3620 * Appends a string array to the message.
3622 * @param iter an iterator pointing to the end of the message
3623 * @param value the array
3624 * @param len the length of the array
3625 * @returns #TRUE on success
3628 dbus_message_iter_append_string_array (DBusMessageIter *iter,
3632 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
3634 _dbus_return_val_if_fail (dbus_message_iter_append_check (real), FALSE);
3636 if (!append_array_type (real, DBUS_TYPE_STRING, NULL, NULL))
3639 if (!_dbus_marshal_string_array (&real->message->body, real->message->byte_order, value, len))
3641 _dbus_string_set_length (&real->message->body, real->pos);
3645 dbus_message_iter_append_done (real);
3651 * Sets the message sender.
3653 * @param message the message
3654 * @param sender the sender
3655 * @returns #FALSE if not enough memory
3658 dbus_message_set_sender (DBusMessage *message,
3661 _dbus_return_val_if_fail (message != NULL, FALSE);
3662 _dbus_return_val_if_fail (!message->locked, FALSE);
3666 delete_string_field (message, FIELD_SENDER);
3671 return set_string_field (message,
3678 * Sets a flag indicating that the message is an error reply
3679 * message, i.e. an "exception" rather than a normal response.
3681 * @param message the message
3682 * @param is_error_reply #TRUE if this is an error message.
3685 dbus_message_set_is_error (DBusMessage *message,
3686 dbus_bool_t is_error_reply)
3690 _dbus_return_if_fail (message != NULL);
3691 _dbus_return_if_fail (!message->locked);
3693 header = _dbus_string_get_data_len (&message->header, 1, 1);
3696 *header |= DBUS_HEADER_FLAG_ERROR;
3698 *header &= ~DBUS_HEADER_FLAG_ERROR;
3702 * Returns #TRUE if the message is an error
3703 * reply to some previous message we sent.
3705 * @param message the message
3706 * @returns #TRUE if the message is an error
3709 dbus_message_get_is_error (DBusMessage *message)
3713 _dbus_return_val_if_fail (message != NULL, FALSE);
3715 header = _dbus_string_get_const_data_len (&message->header, 1, 1);
3717 return (*header & DBUS_HEADER_FLAG_ERROR) != 0;
3721 * Gets the service which originated this message,
3722 * or #NULL if unknown or inapplicable.
3724 * @param message the message
3725 * @returns the service name or #NULL
3728 dbus_message_get_sender (DBusMessage *message)
3730 _dbus_return_val_if_fail (message != NULL, NULL);
3732 return get_string_field (message, FIELD_SENDER, NULL);
3736 * Checks whether the message has the given name.
3737 * If the message has no name or has a different
3738 * name, returns #FALSE.
3740 * @param message the message
3741 * @param name the name to check (must not be #NULL)
3743 * @returns #TRUE if the message has the given name
3746 dbus_message_name_is (DBusMessage *message,
3751 _dbus_return_val_if_fail (message != NULL, FALSE);
3752 _dbus_return_val_if_fail (name != NULL, FALSE);
3754 n = dbus_message_get_name (message);
3756 if (n && strcmp (n, name) == 0)
3763 * Checks whether the message was sent to the given service. If the
3764 * message has no service specified or has a different name, returns
3767 * @param message the message
3768 * @param service the service to check (must not be #NULL)
3770 * @returns #TRUE if the message has the given destination service
3773 dbus_message_service_is (DBusMessage *message,
3774 const char *service)
3778 _dbus_return_val_if_fail (message != NULL, FALSE);
3779 _dbus_return_val_if_fail (service != NULL, FALSE);
3781 s = dbus_message_get_service (message);
3783 if (s && strcmp (s, service) == 0)
3790 * Checks whether the message has the given service as its sender. If
3791 * the message has no sender specified or has a different sender,
3792 * returns #FALSE. Note that if a peer application owns multiple
3793 * services, its messages will have only one of those services as the
3794 * sender (usually the base service). So you can't use this
3795 * function to prove the sender didn't own service Foo, you can
3796 * only use it to prove that it did.
3798 * @param message the message
3799 * @param service the service to check (must not be #NULL)
3801 * @returns #TRUE if the message has the given origin service
3804 dbus_message_sender_is (DBusMessage *message,
3805 const char *service)
3809 _dbus_assert (service != NULL);
3811 s = dbus_message_get_sender (message);
3813 if (s && strcmp (s, service) == 0)
3820 * Sets a #DBusError based on the contents of the given
3821 * message. The error is only set if the message
3822 * is an error message, as in dbus_message_get_is_error().
3823 * The name of the error is set to the name of the message,
3824 * and the error message is set to the first argument
3825 * if the argument exists and is a string.
3827 * The return value indicates whether the error was set (the error is
3828 * set if and only if the message is an error message).
3829 * So you can check for an error reply and convert it to DBusError
3832 * @param error the error to set
3833 * @param message the message to set it from
3834 * @returns #TRUE if dbus_message_get_is_error() returns #TRUE for the message
3837 dbus_set_error_from_message (DBusError *error,
3838 DBusMessage *message)
3842 _dbus_return_val_if_fail (message != NULL, FALSE);
3843 _dbus_return_val_if_error_is_set (error, FALSE);
3845 if (!dbus_message_get_is_error (message))
3849 dbus_message_get_args (message, NULL,
3850 DBUS_TYPE_STRING, &str,
3853 dbus_set_error (error, dbus_message_get_name (message),
3854 str ? "%s" : NULL, str);
3864 * @addtogroup DBusMessageInternals
3869 * @typedef DBusMessageLoader
3871 * The DBusMessageLoader object encapsulates the process of converting
3872 * a byte stream into a series of DBusMessage. It buffers the incoming
3873 * bytes as efficiently as possible, and generates a queue of
3874 * messages. DBusMessageLoader is typically used as part of a
3875 * DBusTransport implementation. The DBusTransport then hands off
3876 * the loaded messages to a DBusConnection, making the messages
3877 * visible to the application.
3879 * @todo write tests for break-loader that a) randomly delete header
3880 * fields and b) set string fields to zero-length and other funky
3885 /* we definitely use signed ints for sizes, so don't exceed
3886 * _DBUS_INT_MAX; and add 16 for paranoia, since a message
3887 * over 128M is pretty nuts anyhow.
3891 * The maximum sane message size.
3893 #define MAX_SANE_MESSAGE_SIZE (_DBUS_INT_MAX/16)
3896 * Implementation details of DBusMessageLoader.
3897 * All members are private.
3899 struct DBusMessageLoader
3901 int refcount; /**< Reference count. */
3903 DBusString data; /**< Buffered data */
3905 DBusList *messages; /**< Complete messages. */
3907 long max_message_size; /**< Maximum size of a message */
3909 unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
3911 unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
3915 * The initial buffer size of the message loader.
3917 * @todo this should be based on min header size plus some average
3918 * body size, or something. Or rather, the min header size only, if we
3919 * want to try to read only the header, store that in a DBusMessage,
3920 * then read only the body and store that, etc., depends on
3921 * how we optimize _dbus_message_loader_get_buffer() and what
3922 * the exact message format is.
3924 #define INITIAL_LOADER_DATA_LEN 32
3927 * Creates a new message loader. Returns #NULL if memory can't
3930 * @returns new loader, or #NULL.
3933 _dbus_message_loader_new (void)
3935 DBusMessageLoader *loader;
3937 loader = dbus_new0 (DBusMessageLoader, 1);
3941 loader->refcount = 1;
3943 /* Try to cap message size at something that won't *totally* hose
3944 * the system if we have a couple of them.
3946 loader->max_message_size = _DBUS_ONE_MEGABYTE * 32;
3948 if (!_dbus_string_init (&loader->data))
3954 /* preallocate the buffer for speed, ignore failure */
3955 _dbus_string_set_length (&loader->data, INITIAL_LOADER_DATA_LEN);
3956 _dbus_string_set_length (&loader->data, 0);
3962 * Increments the reference count of the loader.
3964 * @param loader the loader.
3967 _dbus_message_loader_ref (DBusMessageLoader *loader)
3969 loader->refcount += 1;
3973 * Decrements the reference count of the loader and finalizes the
3974 * loader when the count reaches zero.
3976 * @param loader the loader.
3979 _dbus_message_loader_unref (DBusMessageLoader *loader)
3981 loader->refcount -= 1;
3982 if (loader->refcount == 0)
3984 _dbus_list_foreach (&loader->messages,
3985 (DBusForeachFunction) dbus_message_unref,
3987 _dbus_list_clear (&loader->messages);
3988 _dbus_string_free (&loader->data);
3994 * Gets the buffer to use for reading data from the network. Network
3995 * data is read directly into an allocated buffer, which is then used
3996 * in the DBusMessage, to avoid as many extra memcpy's as possible.
3997 * The buffer must always be returned immediately using
3998 * _dbus_message_loader_return_buffer(), even if no bytes are
3999 * successfully read.
4001 * @todo this function can be a lot more clever. For example
4002 * it can probably always return a buffer size to read exactly
4003 * the body of the next message, thus avoiding any memory wastage
4006 * @todo we need to enforce a max length on strings in header fields.
4008 * @param loader the message loader.
4009 * @param buffer the buffer
4012 _dbus_message_loader_get_buffer (DBusMessageLoader *loader,
4013 DBusString **buffer)
4015 _dbus_assert (!loader->buffer_outstanding);
4017 *buffer = &loader->data;
4019 loader->buffer_outstanding = TRUE;
4023 * The smallest header size that can occur.
4024 * (It won't be valid)
4026 #define DBUS_MINIMUM_HEADER_SIZE 16
4028 /** Pack four characters as in "abcd" into a uint32 */
4029 #define FOUR_CHARS_TO_UINT32(a, b, c, d) \
4030 ((((dbus_uint32_t)a) << 24) | \
4031 (((dbus_uint32_t)b) << 16) | \
4032 (((dbus_uint32_t)c) << 8) | \
4035 /** DBUS_HEADER_FIELD_NAME packed into a dbus_uint32_t */
4036 #define DBUS_HEADER_FIELD_NAME_AS_UINT32 \
4037 FOUR_CHARS_TO_UINT32 ('n', 'a', 'm', 'e')
4039 /** DBUS_HEADER_FIELD_SERVICE packed into a dbus_uint32_t */
4040 #define DBUS_HEADER_FIELD_SERVICE_AS_UINT32 \
4041 FOUR_CHARS_TO_UINT32 ('s', 'r', 'v', 'c')
4043 /** DBUS_HEADER_FIELD_REPLY packed into a dbus_uint32_t */
4044 #define DBUS_HEADER_FIELD_REPLY_AS_UINT32 \
4045 FOUR_CHARS_TO_UINT32 ('r', 'p', 'l', 'y')
4047 /** DBUS_HEADER_FIELD_SENDER Packed into a dbus_uint32_t */
4048 #define DBUS_HEADER_FIELD_SENDER_AS_UINT32 \
4049 FOUR_CHARS_TO_UINT32 ('s', 'n', 'd', 'r')
4052 decode_string_field (const DBusString *data,
4053 HeaderField fields[FIELD_LAST],
4057 const char *field_name)
4060 int string_data_pos;
4062 if (fields[field].offset >= 0)
4064 _dbus_verbose ("%s field provided twice\n",
4069 if (type != DBUS_TYPE_STRING)
4071 _dbus_verbose ("%s field has wrong type %s\n",
4072 field_name, _dbus_type_to_string (type));
4076 /* skip padding after typecode, skip string length;
4077 * we assume that the string arg has already been validated
4078 * for sanity and UTF-8
4080 string_data_pos = _DBUS_ALIGN_VALUE (pos, 4) + 4;
4081 _dbus_assert (string_data_pos < _dbus_string_get_length (data));
4083 _dbus_string_init_const (&tmp,
4084 _dbus_string_get_const_data (data) + string_data_pos);
4086 if (field == FIELD_NAME)
4088 if (!_dbus_string_validate_name (&tmp, 0, _dbus_string_get_length (&tmp)))
4090 _dbus_verbose ("%s field has invalid content \"%s\"\n",
4091 field_name, _dbus_string_get_const_data (&tmp));
4095 if (_dbus_string_starts_with_c_str (&tmp,
4096 DBUS_NAMESPACE_LOCAL_MESSAGE))
4098 _dbus_verbose ("Message is in the local namespace\n");
4104 if (!_dbus_string_validate_service (&tmp, 0, _dbus_string_get_length (&tmp)))
4106 _dbus_verbose ("%s field has invalid content \"%s\"\n",
4107 field_name, _dbus_string_get_const_data (&tmp));
4112 fields[field].offset = _DBUS_ALIGN_VALUE (pos, 4);
4115 _dbus_verbose ("Found field %s name at offset %d\n",
4116 field_name, fields[field].offset);
4123 decode_header_data (const DBusString *data,
4126 HeaderField fields[FIELD_LAST],
4127 int *message_padding)
4134 if (header_len < 16)
4138 while (i < FIELD_LAST)
4140 fields[i].offset = -1;
4144 fields[FIELD_HEADER_LENGTH].offset = 4;
4145 fields[FIELD_BODY_LENGTH].offset = 8;
4146 fields[FIELD_CLIENT_SERIAL].offset = 12;
4148 /* Now handle the named fields. A real named field is at least 4
4149 * bytes for the name, plus a type code (1 byte) plus padding. So
4150 * if we have less than 8 bytes left, it must be alignment padding,
4151 * not a field. While >= 8 bytes can't be entirely alignment
4155 while ((pos + 7) < header_len)
4157 pos = _DBUS_ALIGN_VALUE (pos, 4);
4159 if ((pos + 4) > header_len)
4162 field =_dbus_string_get_const_data_len (data, pos, 4);
4165 _dbus_assert (_DBUS_ALIGN_ADDRESS (field, 4) == field);
4167 if (!_dbus_marshal_validate_type (data, pos, &type, &pos))
4169 _dbus_verbose ("Failed to validate type of named header field\n");
4173 if (!_dbus_marshal_validate_arg (data, byte_order, 0, type, -1, pos, &new_pos))
4175 _dbus_verbose ("Failed to validate argument to named header field\n");
4179 if (new_pos > header_len)
4181 _dbus_verbose ("Named header field tries to extend beyond header length\n");
4185 switch (DBUS_UINT32_FROM_BE (*(int*)field))
4187 case DBUS_HEADER_FIELD_SERVICE_AS_UINT32:
4188 if (!decode_string_field (data, fields, pos, type,
4190 DBUS_HEADER_FIELD_SERVICE))
4194 case DBUS_HEADER_FIELD_NAME_AS_UINT32:
4195 if (!decode_string_field (data, fields, pos, type,
4197 DBUS_HEADER_FIELD_NAME))
4201 case DBUS_HEADER_FIELD_SENDER_AS_UINT32:
4202 if (!decode_string_field (data, fields, pos, type,
4204 DBUS_HEADER_FIELD_SENDER))
4208 case DBUS_HEADER_FIELD_REPLY_AS_UINT32:
4209 if (fields[FIELD_REPLY_SERIAL].offset >= 0)
4211 _dbus_verbose ("%s field provided twice\n",
4212 DBUS_HEADER_FIELD_REPLY);
4216 if (type != DBUS_TYPE_UINT32)
4218 _dbus_verbose ("%s field has wrong type\n", DBUS_HEADER_FIELD_REPLY);
4222 fields[FIELD_REPLY_SERIAL].offset = _DBUS_ALIGN_VALUE (pos, 4);
4224 _dbus_verbose ("Found reply serial at offset %d\n",
4225 fields[FIELD_REPLY_SERIAL].offset);
4229 _dbus_verbose ("Ignoring an unknown header field: %c%c%c%c at offset %d\n",
4230 field[0], field[1], field[2], field[3], pos);
4236 if (pos < header_len)
4238 /* Alignment padding, verify that it's nul */
4239 _dbus_assert ((header_len - pos) < 8);
4241 if (!_dbus_string_validate_nul (data,
4242 pos, (header_len - pos)))
4244 _dbus_verbose ("header alignment padding is not nul\n");
4249 /* Name field is mandatory */
4250 if (fields[FIELD_NAME].offset < 0)
4252 _dbus_verbose ("No %s field provided\n",
4253 DBUS_HEADER_FIELD_NAME);
4257 if (message_padding)
4258 *message_padding = header_len - pos;
4264 * Returns a buffer obtained from _dbus_message_loader_get_buffer(),
4265 * indicating to the loader how many bytes of the buffer were filled
4266 * in. This function must always be called, even if no bytes were
4267 * successfully read.
4269 * @param loader the loader.
4270 * @param buffer the buffer.
4271 * @param bytes_read number of bytes that were read into the buffer.
4274 _dbus_message_loader_return_buffer (DBusMessageLoader *loader,
4278 _dbus_assert (loader->buffer_outstanding);
4279 _dbus_assert (buffer == &loader->data);
4281 loader->buffer_outstanding = FALSE;
4285 * Converts buffered data into messages.
4287 * @param loader the loader.
4288 * @returns #TRUE if we had enough memory to finish.
4291 _dbus_message_loader_queue_messages (DBusMessageLoader *loader)
4293 if (loader->corrupted)
4296 while (_dbus_string_get_length (&loader->data) >= 16)
4298 DBusMessage *message;
4299 const char *header_data;
4300 int byte_order, header_len, body_len, header_padding;
4301 dbus_uint32_t header_len_unsigned, body_len_unsigned;
4303 header_data = _dbus_string_get_const_data_len (&loader->data, 0, 16);
4305 _dbus_assert (_DBUS_ALIGN_ADDRESS (header_data, 4) == header_data);
4307 if (header_data[2] != DBUS_MAJOR_PROTOCOL_VERSION)
4309 _dbus_verbose ("Message has protocol version %d ours is %d\n",
4310 (int) header_data[2], DBUS_MAJOR_PROTOCOL_VERSION);
4311 loader->corrupted = TRUE;
4315 byte_order = header_data[0];
4317 if (byte_order != DBUS_LITTLE_ENDIAN &&
4318 byte_order != DBUS_BIG_ENDIAN)
4320 _dbus_verbose ("Message with bad byte order '%c' received\n",
4322 loader->corrupted = TRUE;
4326 header_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 4);
4327 body_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 8);
4329 if (header_len_unsigned < 16)
4331 _dbus_verbose ("Message had broken too-small header length %u\n",
4332 header_len_unsigned);
4333 loader->corrupted = TRUE;
4337 if (header_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE ||
4338 body_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE)
4340 _dbus_verbose ("Header or body length too large (%u %u)\n",
4341 header_len_unsigned,
4343 loader->corrupted = TRUE;
4347 /* Now that we know the values are in signed range, get
4348 * rid of stupid unsigned, just causes bugs
4350 header_len = header_len_unsigned;
4351 body_len = body_len_unsigned;
4353 if (_DBUS_ALIGN_VALUE (header_len, 8) != header_len_unsigned)
4356 _dbus_verbose ("header length %d is not aligned to 8 bytes\n",
4358 loader->corrupted = TRUE;
4362 if (header_len + body_len > loader->max_message_size)
4364 _dbus_verbose ("Message claimed length header = %d body = %d exceeds max message length %ld\n",
4365 header_len, body_len, loader->max_message_size);
4366 loader->corrupted = TRUE;
4370 if (_dbus_string_get_length (&loader->data) >= (header_len + body_len))
4372 HeaderField fields[FIELD_LAST];
4377 _dbus_verbose_bytes_of_string (&loader->data, 0, header_len + body_len);
4379 if (!decode_header_data (&loader->data, header_len, byte_order,
4380 fields, &header_padding))
4382 _dbus_verbose ("Header was invalid\n");
4383 loader->corrupted = TRUE;
4387 next_arg = header_len;
4388 while (next_arg < (header_len + body_len))
4391 int prev = next_arg;
4393 if (!_dbus_marshal_validate_type (&loader->data, next_arg,
4396 _dbus_verbose ("invalid typecode at offset %d\n", prev);
4397 loader->corrupted = TRUE;
4401 if (!_dbus_marshal_validate_arg (&loader->data,
4408 _dbus_verbose ("invalid type data at %d, next_arg\n", next_arg);
4409 loader->corrupted = TRUE;
4413 _dbus_assert (next_arg > prev);
4416 if (next_arg > (header_len + body_len))
4418 _dbus_verbose ("end of last arg at %d but message has len %d+%d=%d\n",
4419 next_arg, header_len, body_len,
4420 header_len + body_len);
4421 loader->corrupted = TRUE;
4425 message = dbus_message_new_empty_header ();
4426 if (message == NULL)
4428 _dbus_verbose ("Failed to allocate empty message\n");
4432 message->byte_order = byte_order;
4433 message->header_padding = header_padding;
4435 /* Copy in the offsets we found */
4437 while (i < FIELD_LAST)
4439 message->header_fields[i] = fields[i];
4443 if (!_dbus_list_append (&loader->messages, message))
4445 _dbus_verbose ("Failed to append new message to loader queue\n");
4446 dbus_message_unref (message);
4450 _dbus_assert (_dbus_string_get_length (&message->header) == 0);
4451 _dbus_assert (_dbus_string_get_length (&message->body) == 0);
4453 _dbus_assert (_dbus_string_get_length (&loader->data) >=
4454 (header_len + body_len));
4456 if (!_dbus_string_move_len (&loader->data, 0, header_len, &message->header, 0))
4458 _dbus_verbose ("Failed to move header into new message\n");
4459 _dbus_list_remove_last (&loader->messages, message);
4460 dbus_message_unref (message);
4464 if (!_dbus_string_move_len (&loader->data, 0, body_len, &message->body, 0))
4468 _dbus_verbose ("Failed to move body into new message\n");
4470 /* put the header back, we'll try again later */
4471 result = _dbus_string_copy_len (&message->header, 0, header_len,
4473 _dbus_assert (result); /* because DBusString never reallocs smaller */
4475 _dbus_list_remove_last (&loader->messages, message);
4476 dbus_message_unref (message);
4480 _dbus_assert (_dbus_string_get_length (&message->header) == header_len);
4481 _dbus_assert (_dbus_string_get_length (&message->body) == body_len);
4483 /* Fill in caches */
4484 /* FIXME there's no type check if the field has the wrong type */
4485 message->reply_serial = get_uint_field (message,
4486 FIELD_REPLY_SERIAL);
4487 message->client_serial = get_uint_field (message,
4488 FIELD_CLIENT_SERIAL);
4490 _dbus_verbose ("Loaded message %p\n", message);
4500 * Peeks at first loaded message, returns #NULL if no messages have
4503 * @param loader the loader.
4504 * @returns the next message, or #NULL if none.
4507 _dbus_message_loader_peek_message (DBusMessageLoader *loader)
4509 if (loader->messages)
4510 return loader->messages->data;
4516 * Pops a loaded message (passing ownership of the message
4517 * to the caller). Returns #NULL if no messages have been
4520 * @param loader the loader.
4521 * @returns the next message, or #NULL if none.
4524 _dbus_message_loader_pop_message (DBusMessageLoader *loader)
4526 return _dbus_list_pop_first (&loader->messages);
4530 * Pops a loaded message inside a list link (passing ownership of the
4531 * message and link to the caller). Returns #NULL if no messages have
4534 * @param loader the loader.
4535 * @returns the next message link, or #NULL if none.
4538 _dbus_message_loader_pop_message_link (DBusMessageLoader *loader)
4540 return _dbus_list_pop_first_link (&loader->messages);
4544 * Returns a popped message link, used to undo a pop.
4546 * @param loader the loader
4547 * @param link the link with a message in it
4550 _dbus_message_loader_putback_message_link (DBusMessageLoader *loader,
4553 _dbus_list_prepend_link (&loader->messages, link);
4557 * Checks whether the loader is confused due to bad data.
4558 * If messages are received that are invalid, the
4559 * loader gets confused and gives up permanently.
4560 * This state is called "corrupted."
4562 * @param loader the loader
4563 * @returns #TRUE if the loader is hosed.
4566 _dbus_message_loader_get_is_corrupted (DBusMessageLoader *loader)
4568 return loader->corrupted;
4572 * Sets the maximum size message we allow.
4574 * @param loader the loader
4575 * @param size the max message size in bytes
4578 _dbus_message_loader_set_max_message_size (DBusMessageLoader *loader,
4581 if (size > MAX_SANE_MESSAGE_SIZE)
4583 _dbus_verbose ("clamping requested max message size %ld to %d\n",
4584 size, MAX_SANE_MESSAGE_SIZE);
4585 size = MAX_SANE_MESSAGE_SIZE;
4587 loader->max_message_size = size;
4591 * Gets the maximum allowed message size in bytes.
4593 * @param loader the loader
4594 * @returns max size in bytes
4597 _dbus_message_loader_get_max_message_size (DBusMessageLoader *loader)
4599 return loader->max_message_size;
4603 #ifdef DBUS_BUILD_TESTS
4604 #include "dbus-test.h"
4608 message_iter_test (DBusMessage *message)
4610 DBusMessageIter iter, dict, array, array2;
4612 unsigned char *data;
4613 dbus_int32_t *our_int_array;
4616 dbus_message_iter_init (message, &iter);
4619 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_STRING)
4620 _dbus_assert_not_reached ("Argument type isn't string");
4622 str = dbus_message_iter_get_string (&iter);
4623 if (strcmp (str, "Test string") != 0)
4624 _dbus_assert_not_reached ("Strings differ");
4627 if (!dbus_message_iter_next (&iter))
4628 _dbus_assert_not_reached ("Reached end of arguments");
4630 /* Signed integer tests */
4631 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_INT32)
4632 _dbus_assert_not_reached ("Argument type isn't int32");
4634 if (dbus_message_iter_get_int32 (&iter) != -0x12345678)
4635 _dbus_assert_not_reached ("Signed integers differ");
4637 if (!dbus_message_iter_next (&iter))
4638 _dbus_assert_not_reached ("Reached end of fields");
4640 /* Unsigned integer tests */
4641 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_UINT32)
4642 _dbus_assert_not_reached ("Argument type isn't int32");
4644 if (dbus_message_iter_get_uint32 (&iter) != 0xedd1e)
4645 _dbus_assert_not_reached ("Unsigned integers differ");
4647 if (!dbus_message_iter_next (&iter))
4648 _dbus_assert_not_reached ("Reached end of arguments");
4651 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DOUBLE)
4652 _dbus_assert_not_reached ("Argument type isn't double");
4654 if (dbus_message_iter_get_double (&iter) != 3.14159)
4655 _dbus_assert_not_reached ("Doubles differ");
4657 if (!dbus_message_iter_next (&iter))
4658 _dbus_assert_not_reached ("Reached end of arguments");
4660 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_ARRAY)
4661 _dbus_assert_not_reached ("Argument type not an array");
4663 if (dbus_message_iter_get_array_type (&iter) != DBUS_TYPE_DOUBLE)
4664 _dbus_assert_not_reached ("Array type not double");
4667 if (!dbus_message_iter_init_array_iterator (&iter, &array, NULL))
4668 _dbus_assert_not_reached ("Array init failed");
4670 if (dbus_message_iter_get_arg_type (&array) != DBUS_TYPE_DOUBLE)
4671 _dbus_assert_not_reached ("Argument type isn't double");
4673 if (dbus_message_iter_get_double (&array) != 1.5)
4674 _dbus_assert_not_reached ("Unsigned integers differ");
4676 if (!dbus_message_iter_next (&array))
4677 _dbus_assert_not_reached ("Reached end of arguments");
4679 if (dbus_message_iter_get_arg_type (&array) != DBUS_TYPE_DOUBLE)
4680 _dbus_assert_not_reached ("Argument type isn't double");
4682 if (dbus_message_iter_get_double (&array) != 2.5)
4683 _dbus_assert_not_reached ("Unsigned integers differ");
4685 if (dbus_message_iter_next (&array))
4686 _dbus_assert_not_reached ("Didn't reach end of arguments");
4688 if (!dbus_message_iter_next (&iter))
4689 _dbus_assert_not_reached ("Reached end of arguments");
4694 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DICT)
4695 _dbus_assert_not_reached ("not dict type");
4697 if (!dbus_message_iter_init_dict_iterator (&iter, &dict))
4698 _dbus_assert_not_reached ("dict iter failed");
4700 str = dbus_message_iter_get_dict_key (&dict);
4701 if (str == NULL || strcmp (str, "test") != 0)
4702 _dbus_assert_not_reached ("wrong dict key");
4705 if (dbus_message_iter_get_arg_type (&dict) != DBUS_TYPE_UINT32)
4706 _dbus_assert_not_reached ("wrong dict entry type");
4708 if (dbus_message_iter_get_uint32 (&dict) != 0xDEADBEEF)
4709 _dbus_assert_not_reached ("wrong dict entry value");
4711 if (!dbus_message_iter_next (&dict))
4712 _dbus_assert_not_reached ("reached end of dict");
4714 /* array of array of int32 (in dict) */
4716 str = dbus_message_iter_get_dict_key (&dict);
4717 if (str == NULL || strcmp (str, "array") != 0)
4718 _dbus_assert_not_reached ("wrong dict key");
4721 if (dbus_message_iter_get_arg_type (&dict) != DBUS_TYPE_ARRAY)
4722 _dbus_assert_not_reached ("Argument type not an array");
4724 if (dbus_message_iter_get_array_type (&dict) != DBUS_TYPE_ARRAY)
4725 _dbus_assert_not_reached ("Array type not array");
4727 if (!dbus_message_iter_init_array_iterator (&dict, &array, NULL))
4728 _dbus_assert_not_reached ("Array init failed");
4730 if (dbus_message_iter_get_arg_type (&array) != DBUS_TYPE_ARRAY)
4731 _dbus_assert_not_reached ("Argument type isn't array");
4733 if (dbus_message_iter_get_array_type (&array) != DBUS_TYPE_INT32)
4734 _dbus_assert_not_reached ("Array type not int32");
4736 if (!dbus_message_iter_init_array_iterator (&array, &array2, NULL))
4737 _dbus_assert_not_reached ("Array init failed");
4739 if (dbus_message_iter_get_arg_type (&array2) != DBUS_TYPE_INT32)
4740 _dbus_assert_not_reached ("Argument type isn't int32");
4742 if (dbus_message_iter_get_int32 (&array2) != 0x12345678)
4743 _dbus_assert_not_reached ("Signed integers differ");
4745 if (!dbus_message_iter_next (&array2))
4746 _dbus_assert_not_reached ("Reached end of arguments");
4748 if (dbus_message_iter_get_int32 (&array2) != 0x23456781)
4749 _dbus_assert_not_reached ("Signed integers differ");
4751 if (dbus_message_iter_next (&array2))
4752 _dbus_assert_not_reached ("Didn't reached end of arguments");
4754 if (!dbus_message_iter_next (&array))
4755 _dbus_assert_not_reached ("Reached end of arguments");
4757 if (dbus_message_iter_get_array_type (&array) != DBUS_TYPE_INT32)
4758 _dbus_assert_not_reached ("Array type not int32");
4760 if (!dbus_message_iter_get_int32_array (&array,
4763 _dbus_assert_not_reached ("couldn't get int32 array");
4765 _dbus_assert (len == 3);
4766 _dbus_assert (our_int_array[0] == 0x34567812 &&
4767 our_int_array[1] == 0x45678123 &&
4768 our_int_array[2] == 0x56781234);
4769 dbus_free (our_int_array);
4771 if (dbus_message_iter_next (&array))
4772 _dbus_assert_not_reached ("Didn't reach end of array");
4774 if (dbus_message_iter_next (&dict))
4775 _dbus_assert_not_reached ("Didn't reach end of dict");
4777 if (!dbus_message_iter_next (&iter))
4778 _dbus_assert_not_reached ("Reached end of arguments");
4780 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_BYTE)
4782 _dbus_warn ("type was: %d\n", dbus_message_iter_get_arg_type (&iter));
4783 _dbus_assert_not_reached ("wrong type after dict (should be byte)");
4786 if (dbus_message_iter_get_byte (&iter) != 0xF0)
4787 _dbus_assert_not_reached ("wrong value after dict");
4790 if (!dbus_message_iter_next (&iter))
4791 _dbus_assert_not_reached ("Reached end of arguments");
4793 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_NIL)
4794 _dbus_assert_not_reached ("not a nil type");
4796 if (!dbus_message_iter_next (&iter))
4797 _dbus_assert_not_reached ("Reached end of arguments");
4799 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_NAMED)
4800 _dbus_assert_not_reached ("wrong type after dict");
4802 if (!dbus_message_iter_get_named (&iter, &str, &data, &len))
4803 _dbus_assert_not_reached ("failed to get named");
4805 _dbus_assert (strcmp (str, "named")==0);
4806 _dbus_assert (len == 5);
4807 _dbus_assert (strcmp (data, "data")==0);
4811 if (dbus_message_iter_next (&iter))
4812 _dbus_assert_not_reached ("Didn't reach end of arguments");
4817 check_message_handling_type (DBusMessageIter *iter,
4820 DBusMessageIter child_iter;
4826 case DBUS_TYPE_BYTE:
4827 dbus_message_iter_get_byte (iter);
4829 case DBUS_TYPE_BOOLEAN:
4830 dbus_message_iter_get_boolean (iter);
4832 case DBUS_TYPE_INT32:
4833 dbus_message_iter_get_int32 (iter);
4835 case DBUS_TYPE_UINT32:
4836 dbus_message_iter_get_uint32 (iter);
4838 case DBUS_TYPE_INT64:
4839 #ifdef DBUS_HAVE_INT64
4840 dbus_message_iter_get_int64 (iter);
4843 case DBUS_TYPE_UINT64:
4844 #ifdef DBUS_HAVE_INT64
4845 dbus_message_iter_get_uint64 (iter);
4848 case DBUS_TYPE_DOUBLE:
4849 dbus_message_iter_get_double (iter);
4851 case DBUS_TYPE_STRING:
4854 str = dbus_message_iter_get_string (iter);
4857 _dbus_warn ("NULL string in message\n");
4863 case DBUS_TYPE_NAMED:
4866 unsigned char *data;
4869 if (!dbus_message_iter_get_named (iter, &name, &data, &len))
4871 _dbus_warn ("error reading name from named type\n");
4878 case DBUS_TYPE_ARRAY:
4882 if (!dbus_message_iter_init_array_iterator (iter, &child_iter, &array_type))
4884 _dbus_warn ("Failed to init array iterator\n");
4888 while (dbus_message_iter_has_next (&child_iter))
4890 if (!check_message_handling_type (&child_iter, array_type))
4892 _dbus_warn ("error in array element\n");
4896 if (!dbus_message_iter_next (&child_iter))
4901 case DBUS_TYPE_DICT:
4906 if (!dbus_message_iter_init_dict_iterator (iter, &child_iter))
4908 _dbus_warn ("Failed to init dict iterator\n");
4912 while ((entry_type = dbus_message_iter_get_arg_type (&child_iter)) != DBUS_TYPE_INVALID)
4914 key = dbus_message_iter_get_dict_key (&child_iter);
4917 _dbus_warn ("error reading dict key\n");
4922 if (!check_message_handling_type (&child_iter, entry_type))
4924 _dbus_warn ("error in dict value\n");
4928 if (!dbus_message_iter_next (&child_iter))
4935 _dbus_warn ("unknown type %d\n", type);
4944 check_message_handling (DBusMessage *message)
4946 DBusMessageIter iter;
4949 dbus_uint32_t client_serial;
4953 client_serial = dbus_message_get_serial (message);
4955 /* can't use set_serial due to the assertions at the start of it */
4956 set_uint_field (message, FIELD_CLIENT_SERIAL,
4959 if (client_serial != dbus_message_get_serial (message))
4961 _dbus_warn ("get/set cycle for client_serial did not succeed\n");
4965 /* If we implement message_set_arg (message, n, value)
4966 * then we would want to test it here
4969 dbus_message_iter_init (message, &iter);
4970 while ((type = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID)
4972 if (!check_message_handling_type (&iter, type))
4975 if (!dbus_message_iter_next (&iter))
4986 check_have_valid_message (DBusMessageLoader *loader)
4988 DBusMessage *message;
4994 if (!_dbus_message_loader_queue_messages (loader))
4995 _dbus_assert_not_reached ("no memory to queue messages");
4997 if (_dbus_message_loader_get_is_corrupted (loader))
4999 _dbus_warn ("loader corrupted on message that was expected to be valid\n");
5003 message = _dbus_message_loader_pop_message (loader);
5004 if (message == NULL)
5006 _dbus_warn ("didn't load message that was expected to be valid (message not popped)\n");
5010 if (_dbus_string_get_length (&loader->data) > 0)
5012 _dbus_warn ("had leftover bytes from expected-to-be-valid single message\n");
5016 /* Verify that we're able to properly deal with the message.
5017 * For example, this would detect improper handling of messages
5018 * in nonstandard byte order.
5020 if (!check_message_handling (message))
5027 dbus_message_unref (message);
5033 check_invalid_message (DBusMessageLoader *loader)
5039 if (!_dbus_message_loader_queue_messages (loader))
5040 _dbus_assert_not_reached ("no memory to queue messages");
5042 if (!_dbus_message_loader_get_is_corrupted (loader))
5044 _dbus_warn ("loader not corrupted on message that was expected to be invalid\n");
5055 check_incomplete_message (DBusMessageLoader *loader)
5057 DBusMessage *message;
5063 if (!_dbus_message_loader_queue_messages (loader))
5064 _dbus_assert_not_reached ("no memory to queue messages");
5066 if (_dbus_message_loader_get_is_corrupted (loader))
5068 _dbus_warn ("loader corrupted on message that was expected to be valid (but incomplete)\n");
5072 message = _dbus_message_loader_pop_message (loader);
5073 if (message != NULL)
5075 _dbus_warn ("loaded message that was expected to be incomplete\n");
5083 dbus_message_unref (message);
5088 check_loader_results (DBusMessageLoader *loader,
5089 DBusMessageValidity validity)
5091 if (!_dbus_message_loader_queue_messages (loader))
5092 _dbus_assert_not_reached ("no memory to queue messages");
5096 case _DBUS_MESSAGE_VALID:
5097 return check_have_valid_message (loader);
5098 case _DBUS_MESSAGE_INVALID:
5099 return check_invalid_message (loader);
5100 case _DBUS_MESSAGE_INCOMPLETE:
5101 return check_incomplete_message (loader);
5102 case _DBUS_MESSAGE_UNKNOWN:
5106 _dbus_assert_not_reached ("bad DBusMessageValidity");
5112 * Loads the message in the given message file.
5114 * @param filename filename to load
5115 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
5116 * @param data string to load message into
5117 * @returns #TRUE if the message was loaded
5120 dbus_internal_do_not_use_load_message_file (const DBusString *filename,
5132 _dbus_verbose ("Loading raw %s\n", _dbus_string_get_const_data (filename));
5133 dbus_error_init (&error);
5134 if (!_dbus_file_get_contents (data, filename, &error))
5136 _dbus_warn ("Could not load message file %s: %s\n",
5137 _dbus_string_get_const_data (filename),
5139 dbus_error_free (&error);
5145 if (!_dbus_message_data_load (data, filename))
5147 _dbus_warn ("Could not load message file %s\n",
5148 _dbus_string_get_const_data (filename));
5161 * Tries loading the message in the given message file
5162 * and verifies that DBusMessageLoader can handle it.
5164 * @param filename filename to load
5165 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
5166 * @param expected_validity what the message has to be like to return #TRUE
5167 * @returns #TRUE if the message has the expected validity
5170 dbus_internal_do_not_use_try_message_file (const DBusString *filename,
5172 DBusMessageValidity expected_validity)
5179 if (!_dbus_string_init (&data))
5180 _dbus_assert_not_reached ("could not allocate string\n");
5182 if (!dbus_internal_do_not_use_load_message_file (filename, is_raw,
5186 retval = dbus_internal_do_not_use_try_message_data (&data, expected_validity);
5192 if (_dbus_string_get_length (&data) > 0)
5193 _dbus_verbose_bytes_of_string (&data, 0,
5194 _dbus_string_get_length (&data));
5196 _dbus_warn ("Failed message loader test on %s\n",
5197 _dbus_string_get_const_data (filename));
5200 _dbus_string_free (&data);
5206 * Tries loading the given message data.
5209 * @param data the message data
5210 * @param expected_validity what the message has to be like to return #TRUE
5211 * @returns #TRUE if the message has the expected validity
5214 dbus_internal_do_not_use_try_message_data (const DBusString *data,
5215 DBusMessageValidity expected_validity)
5217 DBusMessageLoader *loader;
5225 /* Write the data one byte at a time */
5227 loader = _dbus_message_loader_new ();
5229 len = _dbus_string_get_length (data);
5230 for (i = 0; i < len; i++)
5234 _dbus_message_loader_get_buffer (loader, &buffer);
5235 _dbus_string_append_byte (buffer,
5236 _dbus_string_get_byte (data, i));
5237 _dbus_message_loader_return_buffer (loader, buffer, 1);
5240 if (!check_loader_results (loader, expected_validity))
5243 _dbus_message_loader_unref (loader);
5246 /* Write the data all at once */
5248 loader = _dbus_message_loader_new ();
5253 _dbus_message_loader_get_buffer (loader, &buffer);
5254 _dbus_string_copy (data, 0, buffer,
5255 _dbus_string_get_length (buffer));
5256 _dbus_message_loader_return_buffer (loader, buffer, 1);
5259 if (!check_loader_results (loader, expected_validity))
5262 _dbus_message_loader_unref (loader);
5265 /* Write the data 2 bytes at a time */
5267 loader = _dbus_message_loader_new ();
5269 len = _dbus_string_get_length (data);
5270 for (i = 0; i < len; i += 2)
5274 _dbus_message_loader_get_buffer (loader, &buffer);
5275 _dbus_string_append_byte (buffer,
5276 _dbus_string_get_byte (data, i));
5278 _dbus_string_append_byte (buffer,
5279 _dbus_string_get_byte (data, i+1));
5280 _dbus_message_loader_return_buffer (loader, buffer, 1);
5283 if (!check_loader_results (loader, expected_validity))
5286 _dbus_message_loader_unref (loader);
5294 _dbus_message_loader_unref (loader);
5300 process_test_subdir (const DBusString *test_base_dir,
5302 DBusMessageValidity validity,
5303 DBusForeachMessageFileFunc function,
5306 DBusString test_directory;
5307 DBusString filename;
5315 if (!_dbus_string_init (&test_directory))
5316 _dbus_assert_not_reached ("didn't allocate test_directory\n");
5318 _dbus_string_init_const (&filename, subdir);
5320 if (!_dbus_string_copy (test_base_dir, 0,
5321 &test_directory, 0))
5322 _dbus_assert_not_reached ("couldn't copy test_base_dir to test_directory");
5324 if (!_dbus_concat_dir_and_file (&test_directory, &filename))
5325 _dbus_assert_not_reached ("couldn't allocate full path");
5327 _dbus_string_free (&filename);
5328 if (!_dbus_string_init (&filename))
5329 _dbus_assert_not_reached ("didn't allocate filename string\n");
5331 dbus_error_init (&error);
5332 dir = _dbus_directory_open (&test_directory, &error);
5335 _dbus_warn ("Could not open %s: %s\n",
5336 _dbus_string_get_const_data (&test_directory),
5338 dbus_error_free (&error);
5342 printf ("Testing:\n");
5345 while (_dbus_directory_get_next_file (dir, &filename, &error))
5347 DBusString full_path;
5350 if (!_dbus_string_init (&full_path))
5351 _dbus_assert_not_reached ("couldn't init string");
5353 if (!_dbus_string_copy (&test_directory, 0, &full_path, 0))
5354 _dbus_assert_not_reached ("couldn't copy dir to full_path");
5356 if (!_dbus_concat_dir_and_file (&full_path, &filename))
5357 _dbus_assert_not_reached ("couldn't concat file to dir");
5359 if (_dbus_string_ends_with_c_str (&filename, ".message"))
5361 else if (_dbus_string_ends_with_c_str (&filename, ".message-raw"))
5365 _dbus_verbose ("Skipping non-.message file %s\n",
5366 _dbus_string_get_const_data (&filename));
5367 _dbus_string_free (&full_path);
5372 _dbus_string_get_const_data (&filename));
5374 _dbus_verbose (" expecting %s\n",
5375 validity == _DBUS_MESSAGE_VALID ? "valid" :
5376 (validity == _DBUS_MESSAGE_INVALID ? "invalid" :
5377 (validity == _DBUS_MESSAGE_INCOMPLETE ? "incomplete" : "unknown")));
5379 if (! (*function) (&full_path, is_raw, validity, user_data))
5381 _dbus_string_free (&full_path);
5385 _dbus_string_free (&full_path);
5388 if (dbus_error_is_set (&error))
5390 _dbus_warn ("Could not get next file in %s: %s\n",
5391 _dbus_string_get_const_data (&test_directory),
5393 dbus_error_free (&error);
5402 _dbus_directory_close (dir);
5403 _dbus_string_free (&test_directory);
5404 _dbus_string_free (&filename);
5410 * Runs the given function on every message file in the test suite.
5411 * The function should return #FALSE on test failure or fatal error.
5413 * @param test_data_dir root dir of the test suite data files (top_srcdir/test/data)
5414 * @param func the function to run
5415 * @param user_data data for function
5416 * @returns #FALSE if there's a failure
5419 dbus_internal_do_not_use_foreach_message_file (const char *test_data_dir,
5420 DBusForeachMessageFileFunc func,
5423 DBusString test_directory;
5428 _dbus_string_init_const (&test_directory, test_data_dir);
5430 if (!process_test_subdir (&test_directory, "valid-messages",
5431 _DBUS_MESSAGE_VALID, func, user_data))
5434 if (!process_test_subdir (&test_directory, "invalid-messages",
5435 _DBUS_MESSAGE_INVALID, func, user_data))
5438 if (!process_test_subdir (&test_directory, "incomplete-messages",
5439 _DBUS_MESSAGE_INCOMPLETE, func, user_data))
5446 _dbus_string_free (&test_directory);
5452 verify_test_message (DBusMessage *message)
5454 dbus_int32_t our_int;
5457 dbus_bool_t our_bool;
5458 dbus_int32_t *our_int_array;
5459 dbus_uint32_t our_uint32;
5460 int our_int_array_len;
5461 DBusMessageIter iter, dict;
5463 #ifdef DBUS_HAVE_INT64
5464 dbus_int64_t our_int64;
5467 dbus_message_iter_init (message, &iter);
5469 dbus_error_init (&error);
5470 if (!dbus_message_iter_get_args (&iter, &error,
5471 DBUS_TYPE_INT32, &our_int,
5472 #ifdef DBUS_HAVE_INT64
5473 DBUS_TYPE_INT64, &our_int64,
5475 DBUS_TYPE_STRING, &our_str,
5476 DBUS_TYPE_DOUBLE, &our_double,
5477 DBUS_TYPE_BOOLEAN, &our_bool,
5478 DBUS_TYPE_ARRAY, DBUS_TYPE_UINT32, &our_int_array, &our_int_array_len,
5481 _dbus_verbose ("error: %s - %s\n", error.name, (error.message != NULL)?error.message: "no message");
5482 _dbus_assert_not_reached ("Could not get arguments");
5485 if (our_int != -0x12345678)
5486 _dbus_assert_not_reached ("integers differ!");
5488 #ifdef DBUS_HAVE_INT64
5489 if (our_int64 != -0x123456789abcd)
5490 _dbus_assert_not_reached ("64-bit integers differ!");
5493 if (our_double != 3.14159)
5494 _dbus_assert_not_reached ("doubles differ!");
5496 if (strcmp (our_str, "Test string") != 0)
5497 _dbus_assert_not_reached ("strings differ!");
5498 dbus_free (our_str);
5501 _dbus_assert_not_reached ("booleans differ");
5503 if (our_int_array_len != 4 ||
5504 our_int_array[0] != 0x12345678 ||
5505 our_int_array[1] != 0x23456781 ||
5506 our_int_array[2] != 0x34567812 ||
5507 our_int_array[3] != 0x45678123)
5508 _dbus_assert_not_reached ("array differ");
5509 dbus_free (our_int_array);
5511 if (!dbus_message_iter_next (&iter))
5512 _dbus_assert_not_reached ("Reached end of arguments");
5514 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DICT)
5515 _dbus_assert_not_reached ("not dict type");
5517 if (!dbus_message_iter_init_dict_iterator (&iter, &dict))
5518 _dbus_assert_not_reached ("dict iter failed");
5520 our_str = dbus_message_iter_get_dict_key (&dict);
5521 if (our_str == NULL || strcmp (our_str, "test") != 0)
5522 _dbus_assert_not_reached ("wrong dict key");
5523 dbus_free (our_str);
5525 if (dbus_message_iter_get_arg_type (&dict) != DBUS_TYPE_UINT32)
5527 _dbus_verbose ("dict entry type: %d\n", dbus_message_iter_get_arg_type (&dict));
5528 _dbus_assert_not_reached ("wrong dict entry type");
5531 if ((our_uint32 = dbus_message_iter_get_uint32 (&dict)) != 0xDEADBEEF)
5533 _dbus_verbose ("dict entry val: %x\n", our_uint32);
5534 _dbus_assert_not_reached ("wrong dict entry value");
5537 if (dbus_message_iter_next (&dict))
5538 _dbus_assert_not_reached ("Didn't reach end of dict");
5540 if (!dbus_message_iter_next (&iter))
5541 _dbus_assert_not_reached ("Reached end of arguments");
5543 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_UINT32)
5544 _dbus_assert_not_reached ("wrong type after dict");
5546 if (dbus_message_iter_get_uint32 (&iter) != 0xCAFEBABE)
5547 _dbus_assert_not_reached ("wrong value after dict");
5549 if (dbus_message_iter_next (&iter))
5550 _dbus_assert_not_reached ("Didn't reach end of arguments");
5554 * @ingroup DBusMessageInternals
5555 * Unit test for DBusMessage.
5557 * @returns #TRUE on success.
5560 _dbus_message_test (const char *test_data_dir)
5562 DBusMessage *message;
5563 DBusMessageLoader *loader;
5564 DBusMessageIter iter, child_iter, child_iter2, child_iter3;
5570 const dbus_uint32_t our_int32_array[] = { 0x12345678, 0x23456781, 0x34567812, 0x45678123 };
5572 _dbus_assert (sizeof (DBusMessageRealIter) <= sizeof (DBusMessageIter));
5574 /* Test the vararg functions */
5575 message = dbus_message_new ("test.Message", "org.freedesktop.DBus.Test");
5576 _dbus_message_set_serial (message, 1);
5577 dbus_message_append_args (message,
5578 DBUS_TYPE_INT32, -0x12345678,
5579 #ifdef DBUS_HAVE_INT64
5580 DBUS_TYPE_INT64, -0x123456789abcd,
5582 DBUS_TYPE_STRING, "Test string",
5583 DBUS_TYPE_DOUBLE, 3.14159,
5584 DBUS_TYPE_BOOLEAN, TRUE,
5585 DBUS_TYPE_ARRAY, DBUS_TYPE_UINT32, our_int32_array, 4,
5588 dbus_message_append_iter_init (message, &iter);
5589 dbus_message_iter_append_dict (&iter, &child_iter);
5590 dbus_message_iter_append_dict_key (&child_iter, "test");
5591 dbus_message_iter_append_uint32 (&child_iter, 0xDEADBEEF);
5592 dbus_message_iter_append_uint32 (&iter, 0xCAFEBABE);
5594 _dbus_verbose_bytes_of_string (&message->header, 0,
5595 _dbus_string_get_length (&message->header));
5596 _dbus_verbose_bytes_of_string (&message->body, 0,
5597 _dbus_string_get_length (&message->body));
5599 verify_test_message (message);
5601 copy = dbus_message_copy (message);
5603 _dbus_assert (message->client_serial == copy->client_serial);
5604 _dbus_assert (message->reply_serial == copy->reply_serial);
5605 _dbus_assert (message->header_padding == copy->header_padding);
5607 _dbus_assert (_dbus_string_get_length (&message->header) ==
5608 _dbus_string_get_length (©->header));
5610 _dbus_assert (_dbus_string_get_length (&message->body) ==
5611 _dbus_string_get_length (©->body));
5613 verify_test_message (copy);
5615 name1 = dbus_message_get_name (message);
5616 name2 = dbus_message_get_name (copy);
5618 _dbus_assert (strcmp (name1, name2) == 0);
5620 dbus_message_unref (message);
5621 dbus_message_unref (copy);
5623 message = dbus_message_new ("test.Message", "org.freedesktop.DBus.Test");
5624 _dbus_message_set_serial (message, 1);
5625 dbus_message_set_reply_serial (message, 0x12345678);
5627 dbus_message_append_iter_init (message, &iter);
5628 dbus_message_iter_append_string (&iter, "Test string");
5629 dbus_message_iter_append_int32 (&iter, -0x12345678);
5630 dbus_message_iter_append_uint32 (&iter, 0xedd1e);
5631 dbus_message_iter_append_double (&iter, 3.14159);
5633 dbus_message_iter_append_array (&iter, &child_iter, DBUS_TYPE_DOUBLE);
5634 dbus_message_iter_append_double (&child_iter, 1.5);
5635 dbus_message_iter_append_double (&child_iter, 2.5);
5638 dbus_message_iter_append_dict (&iter, &child_iter);
5639 dbus_message_iter_append_dict_key (&child_iter, "test");
5640 dbus_message_iter_append_uint32 (&child_iter, 0xDEADBEEF);
5642 /* array of array of int32 (in dict) */
5643 dbus_message_iter_append_dict_key (&child_iter, "array");
5644 dbus_message_iter_append_array (&child_iter, &child_iter2, DBUS_TYPE_ARRAY);
5645 dbus_message_iter_append_array (&child_iter2, &child_iter3, DBUS_TYPE_INT32);
5646 dbus_message_iter_append_int32 (&child_iter3, 0x12345678);
5647 dbus_message_iter_append_int32 (&child_iter3, 0x23456781);
5648 _dbus_warn ("next call expected to fail with wrong array type\n");
5649 _dbus_assert (!dbus_message_iter_append_array (&child_iter2, &child_iter3, DBUS_TYPE_UINT32));
5650 dbus_message_iter_append_array (&child_iter2, &child_iter3, DBUS_TYPE_INT32);
5651 dbus_message_iter_append_int32 (&child_iter3, 0x34567812);
5652 dbus_message_iter_append_int32 (&child_iter3, 0x45678123);
5653 dbus_message_iter_append_int32 (&child_iter3, 0x56781234);
5655 dbus_message_iter_append_byte (&iter, 0xF0);
5657 dbus_message_iter_append_nil (&iter);
5659 dbus_message_iter_append_named (&iter, "named",
5662 message_iter_test (message);
5664 /* Message loader test */
5665 _dbus_message_lock (message);
5666 loader = _dbus_message_loader_new ();
5668 /* Write the header data one byte at a time */
5669 data = _dbus_string_get_const_data (&message->header);
5670 for (i = 0; i < _dbus_string_get_length (&message->header); i++)
5674 _dbus_message_loader_get_buffer (loader, &buffer);
5675 _dbus_string_append_byte (buffer, data[i]);
5676 _dbus_message_loader_return_buffer (loader, buffer, 1);
5679 /* Write the body data one byte at a time */
5680 data = _dbus_string_get_const_data (&message->body);
5681 for (i = 0; i < _dbus_string_get_length (&message->body); i++)
5685 _dbus_message_loader_get_buffer (loader, &buffer);
5686 _dbus_string_append_byte (buffer, data[i]);
5687 _dbus_message_loader_return_buffer (loader, buffer, 1);
5690 dbus_message_unref (message);
5692 /* Now pop back the message */
5693 if (!_dbus_message_loader_queue_messages (loader))
5694 _dbus_assert_not_reached ("no memory to queue messages");
5696 if (_dbus_message_loader_get_is_corrupted (loader))
5697 _dbus_assert_not_reached ("message loader corrupted");
5699 message = _dbus_message_loader_pop_message (loader);
5701 _dbus_assert_not_reached ("received a NULL message");
5703 if (dbus_message_get_reply_serial (message) != 0x12345678)
5704 _dbus_assert_not_reached ("reply serial fields differ");
5706 message_iter_test (message);
5708 dbus_message_unref (message);
5709 _dbus_message_loader_unref (loader);
5711 /* Now load every message in test_data_dir if we have one */
5712 if (test_data_dir == NULL)
5715 return dbus_internal_do_not_use_foreach_message_file (test_data_dir,
5716 (DBusForeachMessageFileFunc)
5717 dbus_internal_do_not_use_try_message_file,
5721 #endif /* DBUS_BUILD_TESTS */