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_int32_t client_serial; /**< Cached client serial value for speed */
96 dbus_int32_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 DBusCounter *size_counter; /**< Counter for the size of the message, or #NULL */
105 long size_counter_delta; /**< Size we incremented the size counter by. */
107 dbus_uint32_t changed_stamp;
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 struct DBusMessageRealIter DBusMessageRealIter;
121 * @brief Internals of DBusMessageIter
123 * Object representing a position in a message. All fields are internal.
125 struct DBusMessageRealIter
127 DBusMessageRealIter *parent_iter; /**< parent iter, or NULL */
128 DBusMessage *message; /**< Message used */
129 dbus_uint32_t changed_stamp; /**< stamp to detect invalid iters */
131 /* This is an int instead of an enum to get a guaranteed size for the dummy: */
132 int type; /**< type of iter */
134 int pos; /**< Current position in the string */
135 int end; /**< position right after the container */
136 int container_type; /**< type of the items in the container (used for arrays) */
137 int container_start; /**< offset of the start of the container */
138 int container_length_pos; /**< offset of the length of the container */
139 int wrote_dict_key; /**< whether we wrote the dict key for the current dict element */
143 * Gets the data to be sent over the network for this message.
144 * The header and then the body should be written out.
145 * This function is guaranteed to always return the same
146 * data once a message is locked (with _dbus_message_lock()).
148 * @param message the message.
149 * @param header return location for message header data.
150 * @param body return location for message body data.
153 _dbus_message_get_network_data (DBusMessage *message,
154 const DBusString **header,
155 const DBusString **body)
157 _dbus_assert (message->locked);
159 *header = &message->header;
160 *body = &message->body;
164 clear_header_padding (DBusMessage *message)
166 _dbus_string_shorten (&message->header,
167 message->header_padding);
168 message->header_padding = 0;
172 append_header_padding (DBusMessage *message)
175 old_len = _dbus_string_get_length (&message->header);
176 if (!_dbus_string_align_length (&message->header, 8))
179 message->header_padding = _dbus_string_get_length (&message->header) - old_len;
185 adjust_field_offsets (DBusMessage *message,
195 while (i < FIELD_LAST)
197 if (message->header_fields[i].offset > offsets_after)
198 message->header_fields[i].offset += delta;
205 get_string_field (DBusMessage *message,
212 offset = message->header_fields[field].offset;
214 _dbus_assert (field < FIELD_LAST);
219 /* offset points to string length, string data follows it */
220 /* FIXME _dbus_demarshal_const_string() that returned
221 * a reference to the string plus its len might be nice.
225 *len = _dbus_demarshal_uint32 (&message->header,
230 data = _dbus_string_get_const_data (&message->header);
232 return data + (offset + 4);
236 get_int_field (DBusMessage *message,
241 _dbus_assert (field < FIELD_LAST);
243 offset = message->header_fields[field].offset;
246 return -1; /* useless if -1 is a valid value of course */
248 return _dbus_demarshal_int32 (&message->header,
255 append_int_field (DBusMessage *message,
262 _dbus_assert (!message->locked);
264 clear_header_padding (message);
266 orig_len = _dbus_string_get_length (&message->header);
268 if (!_dbus_string_align_length (&message->header, 4))
271 if (!_dbus_string_append_len (&message->header, name, 4))
274 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_INT32))
277 if (!_dbus_string_align_length (&message->header, 4))
280 message->header_fields[FIELD_REPLY_SERIAL].offset =
281 _dbus_string_get_length (&message->header);
283 if (!_dbus_marshal_int32 (&message->header, message->byte_order,
287 if (!append_header_padding (message))
293 message->header_fields[field].offset = -1;
294 _dbus_string_set_length (&message->header, orig_len);
296 /* this must succeed because it was allocated on function entry and
297 * DBusString doesn't ever realloc smaller
299 if (!append_header_padding (message))
300 _dbus_assert_not_reached ("failed to reappend header padding");
305 append_string_field (DBusMessage *message,
312 _dbus_assert (!message->locked);
314 clear_header_padding (message);
316 orig_len = _dbus_string_get_length (&message->header);
318 if (!_dbus_string_align_length (&message->header, 4))
321 if (!_dbus_string_append_len (&message->header, name, 4))
324 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_STRING))
327 if (!_dbus_string_align_length (&message->header, 4))
330 message->header_fields[field].offset =
331 _dbus_string_get_length (&message->header);
333 if (!_dbus_marshal_string (&message->header, message->byte_order,
337 if (!append_header_padding (message))
343 message->header_fields[field].offset = -1;
344 _dbus_string_set_length (&message->header, orig_len);
346 /* this must succeed because it was allocated on function entry and
347 * DBusString doesn't ever realloc smaller
349 if (!append_header_padding (message))
350 _dbus_assert_not_reached ("failed to reappend header padding");
356 delete_int_field (DBusMessage *message,
359 int offset = message->header_fields[field].offset;
361 _dbus_assert (!message->locked);
362 _dbus_assert (field_is_named[field]);
367 clear_header_padding (message);
369 /* The field typecode and name take up 8 bytes */
370 _dbus_string_delete (&message->header,
374 message->header_fields[field].offset = -1;
376 adjust_field_offsets (message,
380 append_header_padding (message);
384 delete_string_field (DBusMessage *message,
387 int offset = message->header_fields[field].offset;
391 _dbus_assert (!message->locked);
392 _dbus_assert (field_is_named[field]);
397 clear_header_padding (message);
399 get_string_field (message, field, &len);
401 /* The field typecode and name take up 8 bytes, and the nul
402 * termination is 1 bytes, string length integer is 4 bytes
404 delete_len = 8 + 4 + 1 + len;
406 _dbus_string_delete (&message->header,
410 message->header_fields[field].offset = -1;
412 adjust_field_offsets (message,
416 append_header_padding (message);
420 set_int_field (DBusMessage *message,
424 int offset = message->header_fields[field].offset;
426 _dbus_assert (!message->locked);
430 /* need to append the field */
434 case FIELD_REPLY_SERIAL:
435 return append_int_field (message, field,
436 DBUS_HEADER_FIELD_REPLY,
439 _dbus_assert_not_reached ("appending an int field we don't support appending");
445 _dbus_marshal_set_int32 (&message->header,
454 set_uint_field (DBusMessage *message,
458 int offset = message->header_fields[field].offset;
460 _dbus_assert (!message->locked);
464 /* need to append the field */
469 _dbus_assert_not_reached ("appending a uint field we don't support appending");
475 _dbus_marshal_set_uint32 (&message->header,
484 set_string_field (DBusMessage *message,
488 int offset = message->header_fields[field].offset;
490 _dbus_assert (!message->locked);
491 _dbus_assert (value != NULL);
495 /* need to append the field */
500 return append_string_field (message, field,
501 DBUS_HEADER_FIELD_SENDER,
504 _dbus_assert_not_reached ("appending a string field we don't support appending");
515 clear_header_padding (message);
517 old_len = _dbus_string_get_length (&message->header);
519 len = strlen (value);
521 _dbus_string_init_const_len (&v, value,
522 len + 1); /* include nul */
523 if (!_dbus_marshal_set_string (&message->header,
529 new_len = _dbus_string_get_length (&message->header);
531 adjust_field_offsets (message,
535 if (!append_header_padding (message))
541 /* this must succeed because it was allocated on function entry and
542 * DBusString doesn't ever realloc smaller
544 if (!append_header_padding (message))
545 _dbus_assert_not_reached ("failed to reappend header padding");
552 * Sets the serial number of a message.
553 * This can only be done once on a message.
555 * @param message the message
556 * @param serial the serial
559 _dbus_message_set_serial (DBusMessage *message,
562 _dbus_assert (!message->locked);
563 _dbus_assert (dbus_message_get_serial (message) < 0);
565 set_int_field (message, FIELD_CLIENT_SERIAL,
567 message->client_serial = serial;
571 * Sets the reply serial of a message (the client serial
572 * of the message this is a reply to).
574 * @param message the message
575 * @param reply_serial the client serial
576 * @returns #FALSE if not enough memory
579 dbus_message_set_reply_serial (DBusMessage *message,
580 dbus_int32_t reply_serial)
582 _dbus_assert (!message->locked);
584 if (set_int_field (message, FIELD_REPLY_SERIAL,
587 message->reply_serial = reply_serial;
595 * Returns the serial of a message or -1 if none has been specified.
596 * The message's serial number is provided by the application sending
597 * the message and is used to identify replies to this message.
599 * @param message the message
600 * @returns the client serial
603 dbus_message_get_serial (DBusMessage *message)
605 return message->client_serial;
609 * Returns the serial that the message is
610 * a reply to or -1 if none.
612 * @param message the message
613 * @returns the reply serial
616 dbus_message_get_reply_serial (DBusMessage *message)
618 return message->reply_serial;
622 * Adds a counter to be incremented immediately with the
623 * size of this message, and decremented by the size
624 * of this message when this message if finalized.
626 * @param message the message
627 * @param counter the counter
630 _dbus_message_add_size_counter (DBusMessage *message,
631 DBusCounter *counter)
633 _dbus_assert (message->size_counter == NULL); /* If this fails we may need to keep a list of
634 * counters instead of just one
637 message->size_counter = counter;
638 _dbus_counter_ref (message->size_counter);
640 /* When we can change message size, we may want to
641 * update this each time we do so, or we may want to
642 * just KISS like this.
644 message->size_counter_delta =
645 _dbus_string_get_length (&message->header) +
646 _dbus_string_get_length (&message->body);
649 _dbus_verbose ("message has size %ld\n",
650 message->size_counter_delta);
653 _dbus_counter_adjust (message->size_counter, message->size_counter_delta);
657 dbus_message_create_header (DBusMessage *message,
663 if (!_dbus_string_append_byte (&message->header, message->byte_order))
667 if (!_dbus_string_append_byte (&message->header, flags))
670 if (!_dbus_string_append_byte (&message->header, DBUS_MAJOR_PROTOCOL_VERSION))
673 if (!_dbus_string_append_byte (&message->header, 0))
676 message->header_fields[FIELD_HEADER_LENGTH].offset = 4;
677 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
680 message->header_fields[FIELD_BODY_LENGTH].offset = 8;
681 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
684 message->header_fields[FIELD_CLIENT_SERIAL].offset = 12;
685 if (!_dbus_marshal_int32 (&message->header, message->byte_order, -1))
688 /* Marshal message service */
691 if (!append_string_field (message,
693 DBUS_HEADER_FIELD_SERVICE,
698 _dbus_assert (name != NULL);
699 if (!append_string_field (message,
701 DBUS_HEADER_FIELD_NAME,
709 * Locks a message. Allows checking that applications don't keep a
710 * reference to a message in the outgoing queue and change it
711 * underneath us. Messages are locked when they enter the outgoing
712 * queue (dbus_connection_send_message()), and the library complains
713 * if the message is modified while locked.
715 * @param message the message to lock.
718 _dbus_message_lock (DBusMessage *message)
720 if (!message->locked)
722 /* Fill in our lengths */
723 set_uint_field (message,
725 _dbus_string_get_length (&message->header));
727 set_uint_field (message,
729 _dbus_string_get_length (&message->body));
731 message->locked = TRUE;
738 * @defgroup DBusMessage DBusMessage
740 * @brief Message to be sent or received over a DBusConnection.
742 * A DBusMessage is the most basic unit of communication over a
743 * DBusConnection. A DBusConnection represents a stream of messages
744 * received from a remote application, and a stream of messages
745 * sent to a remote application.
751 * @typedef DBusMessage
753 * Opaque data type representing a message received from or to be
754 * sent to another application.
758 dbus_message_new_empty_header (void)
760 DBusMessage *message;
763 message = dbus_new0 (DBusMessage, 1);
767 message->refcount = 1;
768 message->byte_order = DBUS_COMPILER_BYTE_ORDER;
769 message->client_serial = -1;
770 message->reply_serial = -1;
773 while (i < FIELD_LAST)
775 message->header_fields[i].offset = -1;
779 if (!_dbus_string_init (&message->header))
785 if (!_dbus_string_init (&message->body))
787 _dbus_string_free (&message->header);
797 * Constructs a new message. Returns #NULL if memory can't be
798 * allocated for the message. The service may be #NULL in which case
799 * no service is set; this is appropriate when using D-BUS in a
800 * peer-to-peer context (no message bus).
802 * @todo reverse the arguments, first 'name' then 'service'
803 * as 'name' is more fundamental
805 * @param service service that the message should be sent to or #NULL
806 * @param name name of the message
807 * @returns a new DBusMessage, free with dbus_message_unref()
808 * @see dbus_message_unref()
811 dbus_message_new (const char *service,
814 DBusMessage *message;
816 message = dbus_message_new_empty_header ();
820 if (!dbus_message_create_header (message, service, name))
822 dbus_message_unref (message);
830 * Constructs a message that is a reply to some other
831 * message. Returns #NULL if memory can't be allocated
834 * @param original_message the message which the created
835 * message is a reply to.
836 * @returns a new DBusMessage, free with dbus_message_unref()
837 * @see dbus_message_new(), dbus_message_unref()
840 dbus_message_new_reply (DBusMessage *original_message)
842 DBusMessage *message;
843 const char *sender, *name;
845 sender = get_string_field (original_message,
847 name = get_string_field (original_message,
850 /* sender is allowed to be null here in peer-to-peer case */
852 message = dbus_message_new (sender, name);
857 if (!dbus_message_set_reply_serial (message,
858 dbus_message_get_serial (original_message)))
860 dbus_message_unref (message);
868 * Creates a new message that is an error reply to a certain message.
870 * @param original_message the original message
871 * @param error_name the error name
872 * @param error_message the error message string
873 * @returns a new error message
876 dbus_message_new_error_reply (DBusMessage *original_message,
877 const char *error_name,
878 const char *error_message)
880 DBusMessage *message;
882 DBusMessageIter iter;
884 sender = get_string_field (original_message,
887 _dbus_assert (sender != NULL);
889 message = dbus_message_new (sender, error_name);
894 if (!dbus_message_set_reply_serial (message,
895 dbus_message_get_serial (original_message)))
897 dbus_message_unref (message);
901 dbus_message_append_iter_init (message, &iter);
902 if (!dbus_message_iter_append_string (&iter, error_message))
904 dbus_message_unref (message);
908 dbus_message_set_is_error (message, TRUE);
914 * Creates a new message that is an exact replica of the message
915 * specified, except that its refcount is set to 1.
917 * @param message the message.
918 * @returns the new message.
921 dbus_message_copy (const DBusMessage *message)
926 retval = dbus_new0 (DBusMessage, 1);
930 retval->refcount = 1;
931 retval->byte_order = message->byte_order;
932 retval->client_serial = message->client_serial;
933 retval->reply_serial = message->reply_serial;
934 retval->header_padding = message->header_padding;
935 retval->locked = FALSE;
937 if (!_dbus_string_init (&retval->header))
943 if (!_dbus_string_init (&retval->body))
945 _dbus_string_free (&retval->header);
950 if (!_dbus_string_copy (&message->header, 0,
953 _dbus_string_free (&retval->header);
954 _dbus_string_free (&retval->body);
960 if (!_dbus_string_copy (&message->body, 0,
963 _dbus_string_free (&retval->header);
964 _dbus_string_free (&retval->body);
970 for (i = 0; i < FIELD_LAST; i++)
972 retval->header_fields[i].offset = message->header_fields[i].offset;
980 * Increments the reference count of a DBusMessage.
982 * @param message The message
983 * @see dbus_message_unref
986 dbus_message_ref (DBusMessage *message)
988 dbus_atomic_t refcount;
990 refcount = _dbus_atomic_inc (&message->refcount);
991 _dbus_assert (refcount > 1);
995 * Decrements the reference count of a DBusMessage.
997 * @param message The message
998 * @see dbus_message_ref
1001 dbus_message_unref (DBusMessage *message)
1003 dbus_atomic_t refcount;
1005 refcount = _dbus_atomic_dec (&message->refcount);
1007 _dbus_assert (refcount >= 0);
1011 if (message->size_counter != NULL)
1013 _dbus_counter_adjust (message->size_counter,
1014 - message->size_counter_delta);
1015 _dbus_counter_unref (message->size_counter);
1018 _dbus_string_free (&message->header);
1019 _dbus_string_free (&message->body);
1021 dbus_free (message);
1026 * Gets the name of a message.
1028 * @param message the message
1029 * @returns the message name (should not be freed)
1032 dbus_message_get_name (DBusMessage *message)
1034 return get_string_field (message, FIELD_NAME, NULL);
1038 * Gets the destination service of a message.
1040 * @todo I think if we have set_sender/get_sender,
1041 * this function might be better named set_destination/
1042 * get_destination for clarity, as the sender
1043 * is also a service name.
1045 * @param message the message
1046 * @returns the message destination service (should not be freed)
1049 dbus_message_get_service (DBusMessage *message)
1051 return get_string_field (message, FIELD_SERVICE, NULL);
1055 * Appends fields to a message given a variable argument
1056 * list. The variable argument list should contain the type
1057 * of the argument followed by the value to add.
1058 * Array values are specified by a int typecode followed by a pointer
1059 * to the array followed by an int giving the length of the array.
1060 * The argument list must be terminated with 0.
1062 * This function doesn't support dicts or non-fundamental arrays.
1064 * @param message the message
1065 * @param first_arg_type type of the first argument
1066 * @param ... value of first argument, list of additional type-value pairs
1067 * @returns #TRUE on success
1070 dbus_message_append_args (DBusMessage *message,
1077 va_start (var_args, first_arg_type);
1078 retval = dbus_message_append_args_valist (message,
1087 * This function takes a va_list for use by language bindings
1089 * @todo: Shouldn't this function clean up the changes to the message
1092 * @see dbus_message_append_args.
1093 * @param message the message
1094 * @param first_arg_type type of first argument
1095 * @param var_args value of first argument, then list of type/value pairs
1096 * @returns #TRUE on success
1099 dbus_message_append_args_valist (DBusMessage *message,
1104 DBusMessageIter iter;
1106 old_len = _dbus_string_get_length (&message->body);
1108 type = first_arg_type;
1110 dbus_message_append_iter_init (message, &iter);
1117 if (!dbus_message_iter_append_nil (&iter))
1120 case DBUS_TYPE_BOOLEAN:
1121 if (!dbus_message_iter_append_boolean (&iter, va_arg (var_args, dbus_bool_t)))
1124 case DBUS_TYPE_INT32:
1125 if (!dbus_message_iter_append_int32 (&iter, va_arg (var_args, dbus_int32_t)))
1128 case DBUS_TYPE_UINT32:
1129 if (!dbus_message_iter_append_uint32 (&iter, va_arg (var_args, dbus_uint32_t)))
1132 case DBUS_TYPE_DOUBLE:
1133 if (!dbus_message_iter_append_double (&iter, va_arg (var_args, double)))
1136 case DBUS_TYPE_STRING:
1137 if (!dbus_message_iter_append_string (&iter, va_arg (var_args, const char *)))
1140 case DBUS_TYPE_NAMED:
1143 unsigned char *data;
1146 name = va_arg (var_args, const char *);
1147 data = va_arg (var_args, unsigned char *);
1148 len = va_arg (var_args, int);
1150 if (!dbus_message_iter_append_named (&iter, name, data, len))
1154 case DBUS_TYPE_ARRAY:
1159 type = va_arg (var_args, int);
1160 data = va_arg (var_args, void *);
1161 len = va_arg (var_args, int);
1165 case DBUS_TYPE_BYTE:
1166 if (!dbus_message_iter_append_byte_array (&iter, (unsigned char *)data, len))
1169 case DBUS_TYPE_BOOLEAN:
1170 if (!dbus_message_iter_append_boolean_array (&iter, (unsigned char *)data, len))
1173 case DBUS_TYPE_INT32:
1174 if (!dbus_message_iter_append_int32_array (&iter, (dbus_int32_t *)data, len))
1177 case DBUS_TYPE_UINT32:
1178 if (!dbus_message_iter_append_uint32_array (&iter, (dbus_uint32_t *)data, len))
1181 case DBUS_TYPE_DOUBLE:
1182 if (!dbus_message_iter_append_double_array (&iter, (double *)data, len))
1185 case DBUS_TYPE_STRING:
1186 if (!dbus_message_iter_append_string_array (&iter, (const char **)data, len))
1190 case DBUS_TYPE_ARRAY:
1191 case DBUS_TYPE_NAMED:
1192 case DBUS_TYPE_DICT:
1193 _dbus_warn ("dbus_message_append_args_valist doesn't support recursive arrays\n");
1196 _dbus_warn ("Unknown field type %d\n", type);
1202 case DBUS_TYPE_DICT:
1203 _dbus_warn ("dbus_message_append_args_valist doesn't support dicts\n");
1206 _dbus_warn ("Unknown field type %d\n", type);
1210 type = va_arg (var_args, int);
1221 * Gets arguments from a message given a variable argument list.
1222 * The variable argument list should contain the type of the
1223 * argumen followed by a pointer to where the value should be
1224 * stored. The list is terminated with 0.
1226 * @param message the message
1227 * @param error error to be filled in on failure
1228 * @param first_arg_type the first argument type
1229 * @param ... location for first argument value, then list of type-location pairs
1230 * @returns #FALSE if the error was set
1233 dbus_message_get_args (DBusMessage *message,
1241 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1243 va_start (var_args, first_arg_type);
1244 retval = dbus_message_get_args_valist (message, error, first_arg_type, var_args);
1251 * This function takes a va_list for use by language bindings
1253 * @todo We need to free the argument data when an error occurs.
1255 * @see dbus_message_get_args
1256 * @param message the message
1257 * @param error error to be filled in
1258 * @param first_arg_type type of the first argument
1259 * @param var_args return location for first argument, followed by list of type/location pairs
1260 * @returns #FALSE if error was set
1263 dbus_message_get_args_valist (DBusMessage *message,
1268 DBusMessageIter iter;
1270 dbus_message_iter_init (message, &iter);
1271 return dbus_message_iter_get_args_valist (&iter, error, first_arg_type, var_args);
1275 * Gets arguments from a message iterator given a variable argument list.
1276 * The variable argument list should contain the type of the
1277 * argumen followed by a pointer to where the value should be
1278 * stored. The list is terminated with 0.
1280 * @param iter the message iterator
1281 * @param error error to be filled in on failure
1282 * @param first_arg_type the first argument type
1283 * @param ... location for first argument value, then list of type-location pairs
1284 * @returns #FALSE if the error was set
1287 dbus_message_iter_get_args (DBusMessageIter *iter,
1295 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1297 va_start (var_args, first_arg_type);
1298 retval = dbus_message_iter_get_args_valist (iter, error, first_arg_type, var_args);
1305 * This function takes a va_list for use by language bindings
1307 * @todo this function (or some lower-level non-convenience function)
1308 * needs better error handling; should allow the application to
1309 * distinguish between out of memory, and bad data from the remote
1310 * app. It also needs to not leak a bunch of args when it gets
1311 * to the arg that's bad, as that would be a security hole
1312 * (allow one app to force another to leak memory)
1314 * @todo We need to free the argument data when an error occurs.
1316 * @see dbus_message_get_args
1317 * @param iter the message iter
1318 * @param error error to be filled in
1319 * @param first_arg_type type of the first argument
1320 * @param var_args return location for first argument, followed by list of type/location pairs
1321 * @returns #FALSE if error was set
1324 dbus_message_iter_get_args_valist (DBusMessageIter *iter,
1329 int spec_type, msg_type, i;
1332 _DBUS_ASSERT_ERROR_IS_CLEAR (error);
1336 spec_type = first_arg_type;
1339 while (spec_type != 0)
1341 msg_type = dbus_message_iter_get_arg_type (iter);
1343 if (msg_type != spec_type)
1345 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1346 "Argument %d is specified to be of type \"%s\", but "
1347 "is actually of type \"%s\"\n", i,
1348 _dbus_type_to_string (spec_type),
1349 _dbus_type_to_string (msg_type));
1358 case DBUS_TYPE_BYTE:
1362 ptr = va_arg (var_args, unsigned char *);
1364 *ptr = dbus_message_iter_get_byte (iter);
1367 case DBUS_TYPE_BOOLEAN:
1371 ptr = va_arg (var_args, dbus_bool_t *);
1373 *ptr = dbus_message_iter_get_boolean (iter);
1376 case DBUS_TYPE_INT32:
1380 ptr = va_arg (var_args, dbus_int32_t *);
1382 *ptr = dbus_message_iter_get_int32 (iter);
1385 case DBUS_TYPE_UINT32:
1389 ptr = va_arg (var_args, dbus_uint32_t *);
1391 *ptr = dbus_message_iter_get_uint32 (iter);
1395 case DBUS_TYPE_DOUBLE:
1399 ptr = va_arg (var_args, double *);
1401 *ptr = dbus_message_iter_get_double (iter);
1405 case DBUS_TYPE_STRING:
1409 ptr = va_arg (var_args, char **);
1411 *ptr = dbus_message_iter_get_string (iter);
1415 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1422 case DBUS_TYPE_NAMED:
1425 unsigned char **data;
1428 name = va_arg (var_args, char **);
1429 data = va_arg (var_args, unsigned char **);
1430 len = va_arg (var_args, int *);
1432 *name = dbus_message_iter_get_named (iter, data, len);
1435 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1440 case DBUS_TYPE_ARRAY:
1445 type = va_arg (var_args, int);
1446 data = va_arg (var_args, void *);
1447 len = va_arg (var_args, int *);
1449 if (dbus_message_iter_get_array_type (iter) != type)
1451 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1452 "Argument %d is specified to be of type \"array of %s\", but "
1453 "is actually of type \"array of %s\"\n", i,
1454 _dbus_type_to_string (type),
1455 _dbus_type_to_string (dbus_message_iter_get_array_type (iter)));
1461 case DBUS_TYPE_BYTE:
1462 if (!dbus_message_iter_get_byte_array (iter, (unsigned char **)data, len))
1464 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1468 case DBUS_TYPE_BOOLEAN:
1469 if (!dbus_message_iter_get_boolean_array (iter, (unsigned char **)data, len))
1471 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1475 case DBUS_TYPE_INT32:
1476 if (!dbus_message_iter_get_int32_array (iter, (dbus_int32_t **)data, len))
1478 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1482 case DBUS_TYPE_UINT32:
1483 if (!dbus_message_iter_get_uint32_array (iter, (dbus_uint32_t **)data, len))
1485 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1489 case DBUS_TYPE_DOUBLE:
1490 if (!dbus_message_iter_get_double_array (iter, (double **)data, len))
1492 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1496 case DBUS_TYPE_STRING:
1497 if (!dbus_message_iter_get_string_array (iter, (char ***)data, len))
1499 dbus_set_error (error, DBUS_ERROR_NO_MEMORY, NULL);
1504 case DBUS_TYPE_ARRAY:
1505 case DBUS_TYPE_NAMED:
1506 case DBUS_TYPE_DICT:
1507 _dbus_warn ("dbus_message_get_args_valist doesn't support recursive arrays\n");
1508 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1511 _dbus_warn ("Unknown field type %d\n", type);
1512 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1517 case DBUS_TYPE_DICT:
1518 _dbus_warn ("dbus_message_get_args_valist doesn't support dicts\n");
1519 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1522 dbus_set_error (error, DBUS_ERROR_NOT_SUPPORTED, NULL);
1523 _dbus_warn ("Unknown field type %d\n", spec_type);
1527 spec_type = va_arg (var_args, int);
1528 if (spec_type != 0 && !dbus_message_iter_next (iter))
1530 dbus_set_error (error, DBUS_ERROR_INVALID_ARGS,
1531 "Message has only %d arguments, but more were expected", i);
1547 * Initializes a DBusMessageIter representing the arguments of the
1548 * message passed in.
1550 * @param message the message
1551 * @param _iter pointer to an iterator to initialize
1554 dbus_message_iter_init (DBusMessage *message,
1555 DBusMessageIter *iter)
1557 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1559 real->message = message;
1560 real->parent_iter = NULL;
1561 real->changed_stamp = message->changed_stamp;
1563 real->type = DBUS_MESSAGE_ITER_TYPE_MESSAGE;
1565 real->end = _dbus_string_get_length (&message->body);
1567 real->container_type = 0;
1568 real->container_start = 0;
1569 real->container_length_pos = 0;
1570 real->wrote_dict_key = 0;
1574 dbus_message_iter_check (DBusMessageRealIter *iter)
1576 if (iter->changed_stamp != iter->message->changed_stamp)
1577 _dbus_warn ("dbus iterator check failed: invalid iterator\n");
1578 if (iter->pos < 0 || iter->pos > iter->end)
1579 _dbus_warn ("dbus iterator check failed: invalid position\n");
1583 dbus_message_iter_get_data_start (DBusMessageRealIter *iter, int *type)
1590 case DBUS_MESSAGE_ITER_TYPE_MESSAGE:
1591 data = _dbus_string_get_const_data_len (&iter->message->body,
1593 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1596 *type = DBUS_TYPE_INVALID;
1598 return iter->pos + 1;
1600 case DBUS_MESSAGE_ITER_TYPE_ARRAY:
1601 *type = iter->container_type;
1605 case DBUS_MESSAGE_ITER_TYPE_DICT:
1606 /* Get the length of the string */
1607 len = _dbus_demarshal_uint32 (&iter->message->body,
1608 iter->message->byte_order,
1610 pos = pos + len + 1;
1611 data = _dbus_string_get_const_data_len (&iter->message->body,
1613 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1616 *type = DBUS_TYPE_INVALID;
1619 _dbus_assert_not_reached ("Invalid iter type");
1622 *type = DBUS_TYPE_INVALID;
1628 * Checks if an iterator has any more fields.
1630 * @param iter the message iter
1631 * @returns #TRUE if there are more fields
1635 dbus_message_iter_has_next (DBusMessageIter *iter)
1637 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1641 dbus_message_iter_check (real);
1643 if (real->pos >= real->end)
1646 pos = dbus_message_iter_get_data_start (real, &type);
1648 if (!_dbus_marshal_get_arg_end_pos (&real->message->body,
1649 real->message->byte_order,
1650 type, pos, &end_pos))
1653 if (end_pos >= real->end)
1660 * Moves the iterator to the next field.
1662 * @param _iter The message iter
1663 * @returns #TRUE if the iterator was moved to the next field
1666 dbus_message_iter_next (DBusMessageIter *iter)
1668 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1672 dbus_message_iter_check (real);
1674 pos = dbus_message_iter_get_data_start (real, &type);
1676 if (!_dbus_marshal_get_arg_end_pos (&real->message->body,
1677 real->message->byte_order,
1678 type, pos, &end_pos))
1681 if (end_pos >= real->end)
1684 real->pos = end_pos;
1690 * Returns the argument type of the argument that the
1691 * message iterator points at.
1693 * @param iter the message iter
1694 * @returns the field type
1697 dbus_message_iter_get_arg_type (DBusMessageIter *iter)
1699 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1702 dbus_message_iter_check (real);
1704 if (real->pos >= real->end)
1705 return DBUS_TYPE_INVALID;
1707 pos = dbus_message_iter_get_data_start (real, &type);
1713 * Returns the element type of the array that the
1714 * message iterator points at. Note that you need
1715 * to check that the iterator points to an array
1716 * prior to using this function.
1718 * @param iter the message iter
1719 * @returns the field type
1722 dbus_message_iter_get_array_type (DBusMessageIter *iter)
1724 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1728 dbus_message_iter_check (real);
1730 if (real->pos >= real->end)
1731 return DBUS_TYPE_INVALID;
1733 pos = dbus_message_iter_get_data_start (real, &type);
1735 _dbus_assert (type == DBUS_TYPE_ARRAY);
1737 data = _dbus_string_get_const_data_len (&real->message->body,
1740 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1743 return DBUS_TYPE_INVALID;
1748 * Returns the string value that an iterator may point to.
1749 * Note that you need to check that the iterator points to
1750 * a string value before using this function.
1752 * @see dbus_message_iter_get_arg_type
1753 * @param iter the message iter
1754 * @returns the string
1757 dbus_message_iter_get_string (DBusMessageIter *iter)
1759 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1762 dbus_message_iter_check (real);
1764 pos = dbus_message_iter_get_data_start (real, &type);
1766 _dbus_assert (type == DBUS_TYPE_STRING);
1768 return _dbus_demarshal_string (&real->message->body, real->message->byte_order,
1773 * Returns the name and data from a named type that an
1774 * iterator may point to.Note that you need to check that
1775 * the iterator points to a named type before using this
1778 * @see dbus_message_iter_get_arg_type
1779 * @param iter the message iter
1780 * @param value return location for data
1781 * @param len return location for length of data
1782 * @returns the named type name as a string
1786 dbus_message_iter_get_named (DBusMessageIter *iter,
1787 unsigned char **value,
1790 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1794 dbus_message_iter_check (real);
1796 pos = dbus_message_iter_get_data_start (real, &type);
1798 _dbus_assert (type == DBUS_TYPE_NAMED);
1800 name = _dbus_demarshal_string (&real->message->body, real->message->byte_order,
1806 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
1807 pos + 1, NULL, value, len))
1817 * Returns the byte value that an iterator may point to.
1818 * Note that you need to check that the iterator points to
1819 * a byte value before using this function.
1821 * @see dbus_message_iter_get_arg_type
1822 * @param iter the message iter
1823 * @returns the byte value
1826 dbus_message_iter_get_byte (DBusMessageIter *iter)
1828 unsigned char value;
1829 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1832 dbus_message_iter_check (real);
1834 pos = dbus_message_iter_get_data_start (real, &type);
1836 _dbus_assert (type == DBUS_TYPE_BYTE);
1838 value = _dbus_string_get_byte (&real->message->body, pos);
1845 * Returns the boolean value that an iterator may point to.
1846 * Note that you need to check that the iterator points to
1847 * a boolean value before using this function.
1849 * @see dbus_message_iter_get_arg_type
1850 * @param iter the message iter
1851 * @returns the boolean value
1854 dbus_message_iter_get_boolean (DBusMessageIter *iter)
1856 unsigned char value;
1857 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1860 dbus_message_iter_check (real);
1862 pos = dbus_message_iter_get_data_start (real, &type);
1864 _dbus_assert (type == DBUS_TYPE_BOOLEAN);
1866 value = _dbus_string_get_byte (&real->message->body, pos);
1872 * Returns the 32 bit signed integer value that an iterator may point to.
1873 * Note that you need to check that the iterator points to
1874 * an integer value before using this function.
1876 * @see dbus_message_iter_get_arg_type
1877 * @param iter the message iter
1878 * @returns the integer
1881 dbus_message_iter_get_int32 (DBusMessageIter *iter)
1883 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1886 dbus_message_iter_check (real);
1888 pos = dbus_message_iter_get_data_start (real, &type);
1890 _dbus_assert (type == DBUS_TYPE_INT32);
1892 return _dbus_demarshal_int32 (&real->message->body, real->message->byte_order,
1897 * Returns the 32 bit unsigned integer value that an iterator may point to.
1898 * Note that you need to check that the iterator points to
1899 * an unsigned integer value before using this function.
1901 * @see dbus_message_iter_get_arg_type
1902 * @param iter the message iter
1903 * @returns the integer
1906 dbus_message_iter_get_uint32 (DBusMessageIter *iter)
1908 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1911 dbus_message_iter_check (real);
1913 pos = dbus_message_iter_get_data_start (real, &type);
1915 _dbus_assert (type == DBUS_TYPE_UINT32);
1917 return _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
1922 * Returns the double value that an iterator may point to.
1923 * Note that you need to check that the iterator points to
1924 * a string value before using this function.
1926 * @see dbus_message_iter_get_arg_type
1927 * @param iter the message iter
1928 * @returns the double
1931 dbus_message_iter_get_double (DBusMessageIter *iter)
1933 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1936 dbus_message_iter_check (real);
1938 pos = dbus_message_iter_get_data_start (real, &type);
1940 _dbus_assert (type == DBUS_TYPE_DOUBLE);
1942 return _dbus_demarshal_double (&real->message->body, real->message->byte_order,
1947 * Initializes an iterator for the array that the iterator
1948 * may point to. Note that you need to check that the iterator
1949 * points to an array prior to using this function.
1951 * The array element type is returned in array_type, and the array
1952 * iterator can only be used to get that type of data.
1954 * @param iter the iterator
1955 * @param array_iter pointer to an iterator to initialize
1956 * @param array_type gets set to the type of the array elements
1957 * @returns #TRUE on success
1960 dbus_message_iter_init_array_iterator (DBusMessageIter *iter,
1961 DBusMessageIter *array_iter,
1964 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
1965 DBusMessageRealIter *array_real = (DBusMessageRealIter *)array_iter;
1966 int type, pos, len_pos, len;
1970 dbus_message_iter_check (real);
1972 pos = dbus_message_iter_get_data_start (real, &type);
1974 _dbus_assert (type == DBUS_TYPE_ARRAY);
1976 data = _dbus_string_get_const_data_len (&real->message->body,
1979 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_LAST)
1980 _array_type = *data;
1984 len_pos = _DBUS_ALIGN_VALUE (pos + 1, sizeof (dbus_uint32_t));
1985 len = _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
1988 array_real->parent_iter = real;
1989 array_real->message = real->message;
1990 array_real->changed_stamp = real->message->changed_stamp;
1992 array_real->type = DBUS_MESSAGE_ITER_TYPE_ARRAY;
1993 array_real->pos = pos;
1994 array_real->end = pos + len;
1996 array_real->container_type = _array_type;
1997 array_real->container_start = pos;
1998 array_real->container_length_pos = len_pos;
1999 array_real->wrote_dict_key = 0;
2001 if (array_type != NULL)
2002 *array_type = _array_type;
2009 * Initializes an iterator for the dict that the iterator
2010 * may point to. Note that you need to check that the iterator
2011 * points to a dict prior to using this function.
2013 * @param iter the iterator
2014 * @param dict_iter pointer to an iterator to initialize
2015 * @returns #TRUE on success
2018 dbus_message_iter_init_dict_iterator (DBusMessageIter *iter,
2019 DBusMessageIter *dict_iter)
2021 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2022 DBusMessageRealIter *dict_real = (DBusMessageRealIter *)dict_iter;
2023 int type, pos, len_pos, len;
2025 dbus_message_iter_check (real);
2027 pos = dbus_message_iter_get_data_start (real, &type);
2029 _dbus_assert (type == DBUS_TYPE_DICT);
2031 len_pos = _DBUS_ALIGN_VALUE (pos, sizeof (dbus_uint32_t));
2032 len = _dbus_demarshal_uint32 (&real->message->body, real->message->byte_order,
2035 dict_real->parent_iter = real;
2036 dict_real->message = real->message;
2037 dict_real->changed_stamp = real->message->changed_stamp;
2039 dict_real->type = DBUS_MESSAGE_ITER_TYPE_DICT;
2040 dict_real->pos = pos;
2041 dict_real->end = pos + len;
2043 dict_real->container_type = 0;
2044 dict_real->container_start = pos;
2045 dict_real->container_length_pos = len_pos;
2046 dict_real->wrote_dict_key = 0;
2052 * Returns the byte array that the iterator may point to.
2053 * Note that you need to check that the iterator points
2054 * to a byte array prior to using this function.
2056 * @param iter the iterator
2057 * @param value return location for array values
2058 * @param len return location for length of byte array
2059 * @returns #TRUE on success
2062 dbus_message_iter_get_byte_array (DBusMessageIter *iter,
2063 unsigned char **value,
2066 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2070 dbus_message_iter_check (real);
2072 pos = dbus_message_iter_get_data_start (real, &type);
2074 _dbus_assert (type == DBUS_TYPE_ARRAY);
2076 data = _dbus_string_get_const_data_len (&real->message->body,
2080 _dbus_assert (*data == DBUS_TYPE_BYTE);
2082 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
2083 pos + 1, NULL, value, len))
2090 * Returns the boolean array that the iterator may point to. Note that
2091 * you need to check that the iterator points to an array of the
2092 * correct type prior to using this function.
2094 * @param iter the iterator
2095 * @param value return location for the array
2096 * @param len return location for the array length
2097 * @returns #TRUE on success
2100 dbus_message_iter_get_boolean_array (DBusMessageIter *iter,
2101 unsigned char **value,
2104 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2108 dbus_message_iter_check (real);
2110 pos = dbus_message_iter_get_data_start (real, &type);
2112 _dbus_assert (type == DBUS_TYPE_ARRAY);
2114 data = _dbus_string_get_const_data_len (&real->message->body,
2118 _dbus_assert (*data == DBUS_TYPE_BOOLEAN);
2120 if (!_dbus_demarshal_byte_array (&real->message->body, real->message->byte_order,
2121 pos + 1, NULL, value, len))
2128 * Returns the 32 bit signed integer array that the iterator may point
2129 * to. Note that you need to check that the iterator points to an
2130 * array of the correct type prior to using this function.
2132 * @param iter the iterator
2133 * @param value return location for the array
2134 * @param len return location for the array length
2135 * @returns #TRUE on success
2138 dbus_message_iter_get_int32_array (DBusMessageIter *iter,
2139 dbus_int32_t **value,
2142 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2146 dbus_message_iter_check (real);
2148 pos = dbus_message_iter_get_data_start (real, &type);
2150 _dbus_assert (type == DBUS_TYPE_ARRAY);
2152 data = _dbus_string_get_const_data_len (&real->message->body,
2156 _dbus_assert (*data == DBUS_TYPE_INT32);
2158 if (!_dbus_demarshal_int32_array (&real->message->body, real->message->byte_order,
2159 pos + 1, NULL, value, len))
2166 * Returns the 32 bit unsigned integer array that the iterator may point
2167 * to. Note that you need to check that the iterator points to an
2168 * array of the correct type prior to using this function.
2170 * @param iter the iterator
2171 * @param value return location for the array
2172 * @param len return location for the array length
2173 * @returns #TRUE on success
2176 dbus_message_iter_get_uint32_array (DBusMessageIter *iter,
2177 dbus_uint32_t **value,
2180 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2184 dbus_message_iter_check (real);
2186 pos = dbus_message_iter_get_data_start (real, &type);
2188 _dbus_assert (type == DBUS_TYPE_ARRAY);
2190 data = _dbus_string_get_const_data_len (&real->message->body,
2194 _dbus_assert (*data == DBUS_TYPE_UINT32);
2196 if (!_dbus_demarshal_uint32_array (&real->message->body, real->message->byte_order,
2197 pos + 1, NULL, value, len))
2204 * Returns the double array that the iterator may point to. Note that
2205 * you need to check that the iterator points to an array of the
2206 * correct type prior to using this function.
2208 * @param iter the iterator
2209 * @param value return location for the array
2210 * @param len return location for the array length
2211 * @returns #TRUE on success
2214 dbus_message_iter_get_double_array (DBusMessageIter *iter,
2218 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2222 dbus_message_iter_check (real);
2224 pos = dbus_message_iter_get_data_start (real, &type);
2226 _dbus_assert (type == DBUS_TYPE_ARRAY);
2228 data = _dbus_string_get_const_data_len (&real->message->body,
2232 _dbus_assert (*data == DBUS_TYPE_DOUBLE);
2234 if (!_dbus_demarshal_double_array (&real->message->body, real->message->byte_order,
2235 pos + 1, NULL, value, len))
2242 * Returns the string array that the iterator may point to.
2243 * Note that you need to check that the iterator points
2244 * to a byte array prior to using this function.
2246 * The returned value is a #NULL-terminated array of strings.
2247 * Each string is a separate malloc block, and the array
2248 * itself is a malloc block. You can free this type of
2249 * string array with dbus_free_string_array().
2251 * @param iter the iterator
2252 * @param value return location for string values
2253 * @param len return location for length of byte array
2254 * @returns #TRUE on success
2257 dbus_message_iter_get_string_array (DBusMessageIter *iter,
2261 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2265 dbus_message_iter_check (real);
2267 pos = dbus_message_iter_get_data_start (real, &type);
2269 _dbus_assert (type == DBUS_TYPE_ARRAY);
2271 data = _dbus_string_get_const_data_len (&real->message->body,
2275 _dbus_assert (*data == DBUS_TYPE_STRING);
2277 if (!_dbus_demarshal_string_array (&real->message->body, real->message->byte_order,
2278 pos + 1, NULL, value, len))
2285 * Returns the key name fot the dict entry that an iterator
2286 * may point to. Note that you need to check that the iterator
2287 * points to a dict entry before using this function.
2289 * @see dbus_message_iter_init_dict_iterator
2290 * @param iter the message iter
2291 * @returns the key name
2294 dbus_message_iter_get_dict_key (DBusMessageIter *iter)
2296 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2298 dbus_message_iter_check (real);
2300 _dbus_assert (real->type == DBUS_MESSAGE_ITER_TYPE_DICT);
2302 return _dbus_demarshal_string (&real->message->body, real->message->byte_order,
2307 * Initializes a DBusMessageIter pointing to the end of the
2308 * message. This iterator can be used to append data to the
2311 * @param message the message
2312 * @param _iter pointer to an iterator to initialize
2315 dbus_message_append_iter_init (DBusMessage *message,
2316 DBusMessageIter *iter)
2318 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2320 real->message = message;
2321 real->parent_iter = NULL;
2322 real->changed_stamp = message->changed_stamp;
2324 real->type = DBUS_MESSAGE_ITER_TYPE_MESSAGE;
2325 real->end = _dbus_string_get_length (&real->message->body);
2326 real->pos = real->end;
2328 real->container_type = 0;
2329 real->container_length_pos = 0;
2330 real->wrote_dict_key = 0;
2334 dbus_message_iter_append_check (DBusMessageRealIter *iter)
2336 _dbus_assert (!iter->message->locked);
2338 if (iter->changed_stamp != iter->message->changed_stamp)
2339 _dbus_warn ("dbus iterator check failed: invalid iterator");
2341 if (iter->pos != iter->end)
2342 _dbus_warn ("dbus iterator check failed: can only append at end of message");
2344 if (iter->pos != _dbus_string_get_length (&iter->message->body))
2345 _dbus_warn ("dbus iterator check failed: append pos not at end of message string");
2349 dbus_message_iter_append_type (DBusMessageRealIter *iter,
2354 case DBUS_MESSAGE_ITER_TYPE_MESSAGE:
2355 if (!_dbus_string_append_byte (&iter->message->body, type))
2359 case DBUS_MESSAGE_ITER_TYPE_ARRAY:
2360 if (type != iter->container_type)
2362 _dbus_warn ("Appended element of wrong type for array\n");
2367 case DBUS_MESSAGE_ITER_TYPE_DICT:
2368 if (!iter->wrote_dict_key)
2370 _dbus_warn ("Appending dict data before key name\n");
2374 if (!_dbus_string_append_byte (&iter->message->body, type))
2380 _dbus_assert_not_reached ("Invalid iter type");
2388 dbus_message_iter_update_after_change (DBusMessageRealIter *iter)
2390 iter->changed_stamp = iter->message->changed_stamp;
2392 /* Set new end of iter */
2393 iter->end = _dbus_string_get_length (&iter->message->body);
2394 iter->pos = iter->end;
2396 /* Set container length */
2397 if (iter->type == DBUS_MESSAGE_ITER_TYPE_DICT ||
2398 iter->type == DBUS_MESSAGE_ITER_TYPE_ARRAY)
2399 _dbus_marshal_set_uint32 (&iter->message->body,
2400 iter->message->byte_order,
2401 iter->container_length_pos,
2402 iter->end - iter->container_start);
2404 if (iter->parent_iter)
2405 dbus_message_iter_update_after_change (iter->parent_iter);
2409 dbus_message_iter_append_done (DBusMessageRealIter *iter)
2411 iter->message->changed_stamp++;
2412 dbus_message_iter_update_after_change (iter);
2413 iter->wrote_dict_key = FALSE;
2417 * Appends a nil value to the message
2419 * @param iter an iterator pointing to the end of the message
2420 * @returns #TRUE on success
2423 dbus_message_iter_append_nil (DBusMessageIter *iter)
2425 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2427 dbus_message_iter_append_check (real);
2429 if (!dbus_message_iter_append_type (real, DBUS_TYPE_NIL))
2432 dbus_message_iter_append_done (real);
2438 * Appends a boolean value to the message
2440 * @param iter an iterator pointing to the end of the message
2441 * @param value the boolean value
2442 * @returns #TRUE on success
2445 dbus_message_iter_append_boolean (DBusMessageIter *iter,
2448 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2450 dbus_message_iter_append_check (real);
2452 if (!dbus_message_iter_append_type (real, DBUS_TYPE_BOOLEAN))
2455 if (!_dbus_string_append_byte (&real->message->body, (value != FALSE)))
2457 _dbus_string_set_length (&real->message->body, real->pos);
2461 dbus_message_iter_append_done (real);
2467 * Appends a byte to the message
2469 * @param iter an iterator pointing to the end of the message
2470 * @param value the byte value
2471 * @returns #TRUE on success
2474 dbus_message_iter_append_byte (DBusMessageIter *iter,
2475 unsigned char value)
2477 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2479 dbus_message_iter_append_check (real);
2481 if (!dbus_message_iter_append_type (real, DBUS_TYPE_BOOLEAN))
2484 if (!_dbus_string_append_byte (&real->message->body, value))
2486 _dbus_string_set_length (&real->message->body, real->pos);
2490 dbus_message_iter_append_done (real);
2497 * Appends a 32 bit signed integer to the message.
2499 * @param iter an iterator pointing to the end of the message
2500 * @param value the integer value
2501 * @returns #TRUE on success
2504 dbus_message_iter_append_int32 (DBusMessageIter *iter,
2507 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2509 dbus_message_iter_append_check (real);
2511 if (!dbus_message_iter_append_type (real, DBUS_TYPE_INT32))
2514 if (!_dbus_marshal_int32 (&real->message->body, real->message->byte_order, value))
2516 _dbus_string_set_length (&real->message->body, real->pos);
2520 dbus_message_iter_append_done (real);
2526 * Appends a 32 bit unsigned integer to the message.
2528 * @param iter an iterator pointing to the end of the message
2529 * @param value the integer value
2530 * @returns #TRUE on success
2533 dbus_message_iter_append_uint32 (DBusMessageIter *iter,
2534 dbus_uint32_t value)
2536 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2538 dbus_message_iter_append_check (real);
2540 if (!dbus_message_iter_append_type (real, DBUS_TYPE_UINT32))
2543 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, value))
2545 _dbus_string_set_length (&real->message->body, real->pos);
2549 dbus_message_iter_append_done (real);
2555 * Appends a double value to the message.
2557 * @param iter an iterator pointing to the end of the message
2558 * @param value the double value
2559 * @returns #TRUE on success
2562 dbus_message_iter_append_double (DBusMessageIter *iter,
2565 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2567 dbus_message_iter_append_check (real);
2569 if (!dbus_message_iter_append_type (real, DBUS_TYPE_DOUBLE))
2572 if (!_dbus_marshal_double (&real->message->body, real->message->byte_order, value))
2574 _dbus_string_set_length (&real->message->body, real->pos);
2578 dbus_message_iter_append_done (real);
2584 * Appends a UTF-8 string to the message.
2586 * @param iter an iterator pointing to the end of the message
2587 * @param value the string
2588 * @returns #TRUE on success
2591 dbus_message_iter_append_string (DBusMessageIter *iter,
2594 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2596 dbus_message_iter_append_check (real);
2598 if (!dbus_message_iter_append_type (real, DBUS_TYPE_STRING))
2601 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, value))
2603 _dbus_string_set_length (&real->message->body, real->pos);
2607 dbus_message_iter_append_done (real);
2613 * Appends a named type data chunk to the message.
2615 * @param iter an iterator pointing to the end of the message
2616 * @param name the name of the type
2618 * @returns #TRUE on success
2621 dbus_message_iter_append_named (DBusMessageIter *iter,
2623 const unsigned char *data,
2626 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2628 dbus_message_iter_append_check (real);
2630 if (!dbus_message_iter_append_type (real, DBUS_TYPE_NAMED))
2633 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, data))
2635 _dbus_string_set_length (&real->message->body, real->pos);
2639 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, data, len))
2641 _dbus_string_set_length (&real->message->body, real->pos);
2645 dbus_message_iter_append_done (real);
2652 * Appends a dict key name to the message. The iterator used
2653 * must point to a dict.
2655 * @param iter an iterator pointing to the end of the message
2656 * @param value the string
2657 * @returns #TRUE on success
2660 dbus_message_iter_append_dict_key (DBusMessageIter *iter,
2663 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2665 dbus_message_iter_append_check (real);
2666 _dbus_assert (real->type == DBUS_MESSAGE_ITER_TYPE_DICT);
2668 if (real->wrote_dict_key)
2670 _dbus_warn ("Appendinging multiple dict key names\n");
2674 if (!_dbus_marshal_string (&real->message->body, real->message->byte_order, value))
2679 dbus_message_iter_append_done (real);
2680 real->wrote_dict_key = TRUE;
2686 * Appends an array to the message and initializes an iterator that
2687 * can be used to append to the array.
2689 * @param iter an iterator pointing to the end of the message
2690 * @param array_iter pointer to an iter that will be initialized
2691 * @param element_type the type of the array elements
2692 * @returns #TRUE on success
2695 dbus_message_iter_append_array (DBusMessageIter *iter,
2696 DBusMessageIter *array_iter,
2699 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2700 DBusMessageRealIter *array_real = (DBusMessageRealIter *)array_iter;
2703 dbus_message_iter_append_check (real);
2705 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2708 if (!_dbus_string_append_byte (&real->message->body, element_type))
2710 _dbus_string_set_length (&real->message->body, real->pos);
2714 len_pos = _DBUS_ALIGN_VALUE (_dbus_string_get_length (&real->message->body), sizeof (dbus_uint32_t));
2716 /* Empty length for now, backfill later */
2717 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, 0))
2719 _dbus_string_set_length (&real->message->body, real->pos);
2723 array_real->parent_iter = real;
2724 array_real->message = real->message;
2725 array_real->changed_stamp = real->message->changed_stamp;
2727 array_real->type = DBUS_MESSAGE_ITER_TYPE_ARRAY;
2728 array_real->pos = _dbus_string_get_length (&real->message->body);
2729 array_real->end = array_real->end;
2731 array_real->container_type = element_type;
2732 array_real->container_start = array_real->pos;
2733 array_real->container_length_pos = len_pos;
2734 array_real->wrote_dict_key = 0;
2736 dbus_message_iter_append_done (array_real);
2742 * Appends a dict to the message and initializes an iterator that
2743 * can be used to append to the dict.
2745 * @param iter an iterator pointing to the end of the message
2746 * @param array_iter pointer to an iter that will be initialized
2747 * @param element_type the type of the array elements
2748 * @returns #TRUE on success
2751 dbus_message_iter_append_dict (DBusMessageIter *iter,
2752 DBusMessageIter *dict_iter)
2754 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2755 DBusMessageRealIter *dict_real = (DBusMessageRealIter *)dict_iter;
2758 dbus_message_iter_append_check (real);
2760 if (!dbus_message_iter_append_type (real, DBUS_TYPE_DICT))
2763 len_pos = _DBUS_ALIGN_VALUE (_dbus_string_get_length (&real->message->body), sizeof (dbus_uint32_t));
2765 /* Empty length for now, backfill later */
2766 if (!_dbus_marshal_uint32 (&real->message->body, real->message->byte_order, 0))
2768 _dbus_string_set_length (&real->message->body, real->pos);
2772 dict_real->parent_iter = real;
2773 dict_real->message = real->message;
2774 dict_real->changed_stamp = real->message->changed_stamp;
2776 dict_real->type = DBUS_MESSAGE_ITER_TYPE_DICT;
2777 dict_real->pos = _dbus_string_get_length (&real->message->body);
2778 dict_real->end = dict_real->end;
2780 dict_real->container_type = 0;
2781 dict_real->container_start = dict_real->pos;
2782 dict_real->container_length_pos = len_pos;
2783 dict_real->wrote_dict_key = 0;
2785 dbus_message_iter_append_done (dict_real);
2792 * Appends a boolean array to the message.
2794 * @param iter an iterator pointing to the end of the message
2795 * @param value the array
2796 * @param len the length of the array
2797 * @returns #TRUE on success
2800 dbus_message_iter_append_boolean_array (DBusMessageIter *iter,
2801 unsigned const char *value,
2804 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2806 dbus_message_iter_append_check (real);
2808 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2811 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_BOOLEAN))
2813 _dbus_string_set_length (&real->message->body, real->pos);
2817 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, value, len))
2819 _dbus_string_set_length (&real->message->body, real->pos);
2823 dbus_message_iter_append_done (real);
2829 * Appends a 32 bit signed integer array to the message.
2831 * @param iter an iterator pointing to the end of the message
2832 * @param value the array
2833 * @param len the length of the array
2834 * @returns #TRUE on success
2837 dbus_message_iter_append_int32_array (DBusMessageIter *iter,
2838 const dbus_int32_t *value,
2841 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2843 dbus_message_iter_append_check (real);
2845 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2848 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_INT32))
2850 _dbus_string_set_length (&real->message->body, real->pos);
2854 if (!_dbus_marshal_int32_array (&real->message->body, real->message->byte_order, value, len))
2856 _dbus_string_set_length (&real->message->body, real->pos);
2860 dbus_message_iter_append_done (real);
2866 * Appends a 32 bit unsigned integer array to the message.
2868 * @param iter an iterator pointing to the end of the message
2869 * @param value the array
2870 * @param len the length of the array
2871 * @returns #TRUE on success
2874 dbus_message_iter_append_uint32_array (DBusMessageIter *iter,
2875 const dbus_uint32_t *value,
2878 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2880 dbus_message_iter_append_check (real);
2882 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2885 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_UINT32))
2887 _dbus_string_set_length (&real->message->body, real->pos);
2891 if (!_dbus_marshal_uint32_array (&real->message->body, real->message->byte_order, value, len))
2893 _dbus_string_set_length (&real->message->body, real->pos);
2897 dbus_message_iter_append_done (real);
2903 * Appends a double array to the message.
2905 * @param iter an iterator pointing to the end of the message
2906 * @param value the array
2907 * @param len the length of the array
2908 * @returns #TRUE on success
2911 dbus_message_iter_append_double_array (DBusMessageIter *iter,
2912 const double *value,
2915 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2917 dbus_message_iter_append_check (real);
2919 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2922 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_DOUBLE))
2924 _dbus_string_set_length (&real->message->body, real->pos);
2928 if (!_dbus_marshal_double_array (&real->message->body, real->message->byte_order, value, len))
2930 _dbus_string_set_length (&real->message->body, real->pos);
2934 dbus_message_iter_append_done (real);
2940 * Appends a byte array to the message.
2942 * @param iter an iterator pointing to the end of the message
2943 * @param value the array
2944 * @param len the length of the array
2945 * @returns #TRUE on success
2948 dbus_message_iter_append_byte_array (DBusMessageIter *iter,
2949 unsigned const char *value,
2952 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2954 dbus_message_iter_append_check (real);
2956 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2959 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_BYTE))
2961 _dbus_string_set_length (&real->message->body, real->pos);
2965 if (!_dbus_marshal_byte_array (&real->message->body, real->message->byte_order, value, len))
2967 _dbus_string_set_length (&real->message->body, real->pos);
2971 dbus_message_iter_append_done (real);
2977 * Appends a string array to the message.
2979 * @param iter an iterator pointing to the end of the message
2980 * @param value the array
2981 * @param len the length of the array
2982 * @returns #TRUE on success
2985 dbus_message_iter_append_string_array (DBusMessageIter *iter,
2989 DBusMessageRealIter *real = (DBusMessageRealIter *)iter;
2991 dbus_message_iter_append_check (real);
2993 if (!dbus_message_iter_append_type (real, DBUS_TYPE_ARRAY))
2996 if (!_dbus_string_append_byte (&real->message->body, DBUS_TYPE_BYTE))
2998 _dbus_string_set_length (&real->message->body, real->pos);
3002 if (!_dbus_marshal_string_array (&real->message->body, real->message->byte_order, value, len))
3004 _dbus_string_set_length (&real->message->body, real->pos);
3008 dbus_message_iter_append_done (real);
3014 * Sets the message sender.
3016 * @param message the message
3017 * @param sender the sender
3018 * @returns #FALSE if not enough memory
3021 dbus_message_set_sender (DBusMessage *message,
3024 _dbus_assert (!message->locked);
3028 delete_string_field (message, FIELD_SENDER);
3033 return set_string_field (message,
3040 * Sets a flag indicating that the message is an error reply
3041 * message, i.e. an "exception" rather than a normal response.
3043 * @param message the message
3044 * @param is_error_reply #TRUE if this is an error message.
3047 dbus_message_set_is_error (DBusMessage *message,
3048 dbus_bool_t is_error_reply)
3052 _dbus_assert (!message->locked);
3054 header = _dbus_string_get_data_len (&message->header, 1, 1);
3057 *header |= DBUS_HEADER_FLAG_ERROR;
3059 *header &= ~DBUS_HEADER_FLAG_ERROR;
3063 * Returns #TRUE if the message is an error
3064 * reply to some previous message we sent.
3066 * @param message the message
3067 * @returns #TRUE if the message is an error
3070 dbus_message_get_is_error (DBusMessage *message)
3074 header = _dbus_string_get_const_data_len (&message->header, 1, 1);
3076 return (*header & DBUS_HEADER_FLAG_ERROR) != 0;
3080 * Gets the service which originated this message,
3081 * or #NULL if unknown or inapplicable.
3083 * @param message the message
3084 * @returns the service name or #NULL
3087 dbus_message_get_sender (DBusMessage *message)
3089 return get_string_field (message, FIELD_SENDER, NULL);
3093 * Checks whether the message has the given name.
3094 * If the message has no name or has a different
3095 * name, returns #FALSE.
3097 * @param message the message
3098 * @param name the name to check (must not be #NULL)
3100 * @returns #TRUE if the message has the given name
3103 dbus_message_name_is (DBusMessage *message,
3108 _dbus_assert (name != NULL);
3110 n = dbus_message_get_name (message);
3112 if (n && strcmp (n, name) == 0)
3119 * Checks whether the message was sent to the given service. If the
3120 * message has no service specified or has a different name, returns
3123 * @param message the message
3124 * @param service the service to check (must not be #NULL)
3126 * @returns #TRUE if the message has the given destination service
3129 dbus_message_service_is (DBusMessage *message,
3130 const char *service)
3134 _dbus_assert (service != NULL);
3136 s = dbus_message_get_service (message);
3138 if (s && strcmp (s, service) == 0)
3145 * Checks whether the message has the given service as its sender. If
3146 * the message has no sender specified or has a different sender,
3147 * returns #FALSE. Note that if a peer application owns multiple
3148 * services, its messages will have only one of those services as the
3149 * sender (usually the base service). So you can't use this
3150 * function to prove the sender didn't own service Foo, you can
3151 * only use it to prove that it did.
3153 * @param message the message
3154 * @param service the service to check (must not be #NULL)
3156 * @returns #TRUE if the message has the given origin service
3159 dbus_message_sender_is (DBusMessage *message,
3160 const char *service)
3164 _dbus_assert (service != NULL);
3166 s = dbus_message_get_sender (message);
3168 if (s && strcmp (s, service) == 0)
3175 * Sets a #DBusError based on the contents of the given
3176 * message. The error is only set if the message
3177 * is an error message, as in dbus_message_get_is_error().
3178 * The name of the error is set to the name of the message,
3179 * and the error message is set to the first argument
3180 * if the argument exists and is a string.
3182 * The return value indicates whether the error was set (the error is
3183 * set if and only if the message is an error message).
3184 * So you can check for an error reply and convert it to DBusError
3187 * @param error the error to set
3188 * @param message the message to set it from
3189 * @returns #TRUE if dbus_message_get_is_error() returns #TRUE for the message
3192 dbus_set_error_from_message (DBusError *error,
3193 DBusMessage *message)
3197 if (!dbus_message_get_is_error (message))
3201 dbus_message_get_args (message, NULL,
3202 DBUS_TYPE_STRING, &str,
3205 dbus_set_error (error, dbus_message_get_name (message),
3206 str ? "%s" : NULL, str);
3216 * @addtogroup DBusMessageInternals
3221 * @typedef DBusMessageLoader
3223 * The DBusMessageLoader object encapsulates the process of converting
3224 * a byte stream into a series of DBusMessage. It buffers the incoming
3225 * bytes as efficiently as possible, and generates a queue of
3226 * messages. DBusMessageLoader is typically used as part of a
3227 * DBusTransport implementation. The DBusTransport then hands off
3228 * the loaded messages to a DBusConnection, making the messages
3229 * visible to the application.
3231 * @todo write tests for break-loader that a) randomly delete header
3232 * fields and b) set string fields to zero-length and other funky
3237 /* we definitely use signed ints for sizes, so don't exceed
3238 * _DBUS_INT_MAX; and add 16 for paranoia, since a message
3239 * over 128M is pretty nuts anyhow.
3243 * The maximum sane message size.
3245 #define MAX_SANE_MESSAGE_SIZE (_DBUS_INT_MAX/16)
3248 * Implementation details of DBusMessageLoader.
3249 * All members are private.
3251 struct DBusMessageLoader
3253 int refcount; /**< Reference count. */
3255 DBusString data; /**< Buffered data */
3257 DBusList *messages; /**< Complete messages. */
3259 long max_message_size; /**< Maximum size of a message */
3261 unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
3263 unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
3267 * The initial buffer size of the message loader.
3269 * @todo this should be based on min header size plus some average
3270 * body size, or something. Or rather, the min header size only, if we
3271 * want to try to read only the header, store that in a DBusMessage,
3272 * then read only the body and store that, etc., depends on
3273 * how we optimize _dbus_message_loader_get_buffer() and what
3274 * the exact message format is.
3276 #define INITIAL_LOADER_DATA_LEN 32
3279 * Creates a new message loader. Returns #NULL if memory can't
3282 * @returns new loader, or #NULL.
3285 _dbus_message_loader_new (void)
3287 DBusMessageLoader *loader;
3289 loader = dbus_new0 (DBusMessageLoader, 1);
3293 loader->refcount = 1;
3295 /* Try to cap message size at something that won't *totally* hose
3296 * the system if we have a couple of them.
3298 loader->max_message_size = _DBUS_ONE_MEGABYTE * 32;
3300 if (!_dbus_string_init (&loader->data))
3306 /* preallocate the buffer for speed, ignore failure */
3307 _dbus_string_set_length (&loader->data, INITIAL_LOADER_DATA_LEN);
3308 _dbus_string_set_length (&loader->data, 0);
3314 * Increments the reference count of the loader.
3316 * @param loader the loader.
3319 _dbus_message_loader_ref (DBusMessageLoader *loader)
3321 loader->refcount += 1;
3325 * Decrements the reference count of the loader and finalizes the
3326 * loader when the count reaches zero.
3328 * @param loader the loader.
3331 _dbus_message_loader_unref (DBusMessageLoader *loader)
3333 loader->refcount -= 1;
3334 if (loader->refcount == 0)
3336 _dbus_list_foreach (&loader->messages,
3337 (DBusForeachFunction) dbus_message_unref,
3339 _dbus_list_clear (&loader->messages);
3340 _dbus_string_free (&loader->data);
3346 * Gets the buffer to use for reading data from the network. Network
3347 * data is read directly into an allocated buffer, which is then used
3348 * in the DBusMessage, to avoid as many extra memcpy's as possible.
3349 * The buffer must always be returned immediately using
3350 * _dbus_message_loader_return_buffer(), even if no bytes are
3351 * successfully read.
3353 * @todo this function can be a lot more clever. For example
3354 * it can probably always return a buffer size to read exactly
3355 * the body of the next message, thus avoiding any memory wastage
3358 * @todo we need to enforce a max length on strings in header fields.
3360 * @param loader the message loader.
3361 * @param buffer the buffer
3364 _dbus_message_loader_get_buffer (DBusMessageLoader *loader,
3365 DBusString **buffer)
3367 _dbus_assert (!loader->buffer_outstanding);
3369 *buffer = &loader->data;
3371 loader->buffer_outstanding = TRUE;
3375 * The smallest header size that can occur.
3376 * (It won't be valid)
3378 #define DBUS_MINIMUM_HEADER_SIZE 16
3380 /** Pack four characters as in "abcd" into a uint32 */
3381 #define FOUR_CHARS_TO_UINT32(a, b, c, d) \
3382 ((((dbus_uint32_t)a) << 24) | \
3383 (((dbus_uint32_t)b) << 16) | \
3384 (((dbus_uint32_t)c) << 8) | \
3387 /** DBUS_HEADER_FIELD_NAME packed into a dbus_uint32_t */
3388 #define DBUS_HEADER_FIELD_NAME_AS_UINT32 \
3389 FOUR_CHARS_TO_UINT32 ('n', 'a', 'm', 'e')
3391 /** DBUS_HEADER_FIELD_SERVICE packed into a dbus_uint32_t */
3392 #define DBUS_HEADER_FIELD_SERVICE_AS_UINT32 \
3393 FOUR_CHARS_TO_UINT32 ('s', 'r', 'v', 'c')
3395 /** DBUS_HEADER_FIELD_REPLY packed into a dbus_uint32_t */
3396 #define DBUS_HEADER_FIELD_REPLY_AS_UINT32 \
3397 FOUR_CHARS_TO_UINT32 ('r', 'p', 'l', 'y')
3399 /** DBUS_HEADER_FIELD_SENDER Packed into a dbus_uint32_t */
3400 #define DBUS_HEADER_FIELD_SENDER_AS_UINT32 \
3401 FOUR_CHARS_TO_UINT32 ('s', 'n', 'd', 'r')
3403 /* FIXME impose max length on name, srvc, sndr */
3405 decode_header_data (const DBusString *data,
3408 HeaderField fields[FIELD_LAST],
3409 int *message_padding)
3416 if (header_len < 16)
3420 while (i < FIELD_LAST)
3422 fields[i].offset = -1;
3426 fields[FIELD_HEADER_LENGTH].offset = 4;
3427 fields[FIELD_BODY_LENGTH].offset = 8;
3428 fields[FIELD_CLIENT_SERIAL].offset = 12;
3430 /* Now handle the named fields. A real named field is at least 4
3431 * bytes for the name, plus a type code (1 byte) plus padding. So
3432 * if we have less than 8 bytes left, it must be alignment padding,
3433 * not a field. While >= 8 bytes can't be entirely alignment
3437 while ((pos + 7) < header_len)
3439 pos = _DBUS_ALIGN_VALUE (pos, 4);
3441 if ((pos + 4) > header_len)
3444 field =_dbus_string_get_const_data_len (data, pos, 4);
3447 _dbus_assert (_DBUS_ALIGN_ADDRESS (field, 4) == field);
3449 /* I believe FROM_BE is right, but if not we'll find out
3452 switch (DBUS_UINT32_FROM_BE (*(int*)field))
3454 case DBUS_HEADER_FIELD_SERVICE_AS_UINT32:
3455 if (fields[FIELD_SERVICE].offset >= 0)
3457 _dbus_verbose ("%s field provided twice\n",
3458 DBUS_HEADER_FIELD_SERVICE);
3462 fields[FIELD_SERVICE].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
3464 _dbus_verbose ("Found service name at offset %d\n",
3465 fields[FIELD_SERVICE].offset);
3469 case DBUS_HEADER_FIELD_NAME_AS_UINT32:
3470 if (fields[FIELD_NAME].offset >= 0)
3472 _dbus_verbose ("%s field provided twice\n",
3473 DBUS_HEADER_FIELD_NAME);
3477 fields[FIELD_NAME].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
3480 _dbus_verbose ("Found message name at offset %d\n",
3481 fields[FIELD_NAME].offset);
3484 case DBUS_HEADER_FIELD_SENDER_AS_UINT32:
3485 if (fields[FIELD_SENDER].offset >= 0)
3487 _dbus_verbose ("%s field provided twice\n",
3488 DBUS_HEADER_FIELD_SENDER);
3492 fields[FIELD_SENDER].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
3494 _dbus_verbose ("Found sender name at offset %d\n",
3495 fields[FIELD_NAME].offset);
3498 case DBUS_HEADER_FIELD_REPLY_AS_UINT32:
3499 if (fields[FIELD_REPLY_SERIAL].offset >= 0)
3501 _dbus_verbose ("%s field provided twice\n",
3502 DBUS_HEADER_FIELD_REPLY);
3506 fields[FIELD_REPLY_SERIAL].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
3508 _dbus_verbose ("Found reply serial at offset %d\n",
3509 fields[FIELD_REPLY_SERIAL].offset);
3513 _dbus_verbose ("Ignoring an unknown header field: %c%c%c%c at offset %d\n",
3514 field[0], field[1], field[2], field[3], pos);
3517 if (!_dbus_marshal_validate_type (data, pos, &type, &pos))
3519 _dbus_verbose ("Failed to validate type of named header field\n");
3523 if (!_dbus_marshal_validate_arg (data, byte_order, type, pos, &new_pos))
3525 _dbus_verbose ("Failed to validate argument to named header field\n");
3529 if (new_pos > header_len)
3531 _dbus_verbose ("Named header field tries to extend beyond header length\n");
3538 if (pos < header_len)
3540 /* Alignment padding, verify that it's nul */
3541 _dbus_assert ((header_len - pos) < 8);
3543 if (!_dbus_string_validate_nul (data,
3544 pos, (header_len - pos)))
3546 _dbus_verbose ("header alignment padding is not nul\n");
3551 if (fields[FIELD_NAME].offset < 0)
3553 _dbus_verbose ("No %s field provided\n",
3554 DBUS_HEADER_FIELD_NAME);
3558 if (message_padding)
3559 *message_padding = header_len - pos;
3565 * Returns a buffer obtained from _dbus_message_loader_get_buffer(),
3566 * indicating to the loader how many bytes of the buffer were filled
3567 * in. This function must always be called, even if no bytes were
3568 * successfully read.
3570 * @param loader the loader.
3571 * @param buffer the buffer.
3572 * @param bytes_read number of bytes that were read into the buffer.
3575 _dbus_message_loader_return_buffer (DBusMessageLoader *loader,
3579 _dbus_assert (loader->buffer_outstanding);
3580 _dbus_assert (buffer == &loader->data);
3582 loader->buffer_outstanding = FALSE;
3586 * Converts buffered data into messages.
3588 * @param loader the loader.
3589 * @returns #TRUE if we had enough memory to finish.
3592 _dbus_message_loader_queue_messages (DBusMessageLoader *loader)
3594 if (loader->corrupted)
3597 while (_dbus_string_get_length (&loader->data) >= 16)
3599 DBusMessage *message;
3600 const char *header_data;
3601 int byte_order, header_len, body_len, header_padding;
3602 dbus_uint32_t header_len_unsigned, body_len_unsigned;
3604 header_data = _dbus_string_get_const_data_len (&loader->data, 0, 16);
3606 _dbus_assert (_DBUS_ALIGN_ADDRESS (header_data, 4) == header_data);
3608 if (header_data[2] != DBUS_MAJOR_PROTOCOL_VERSION)
3610 _dbus_verbose ("Message has protocol version %d ours is %d\n",
3611 (int) header_data[2], DBUS_MAJOR_PROTOCOL_VERSION);
3612 loader->corrupted = TRUE;
3616 byte_order = header_data[0];
3618 if (byte_order != DBUS_LITTLE_ENDIAN &&
3619 byte_order != DBUS_BIG_ENDIAN)
3621 _dbus_verbose ("Message with bad byte order '%c' received\n",
3623 loader->corrupted = TRUE;
3627 header_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 4);
3628 body_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 8);
3630 if (header_len_unsigned < 16)
3632 _dbus_verbose ("Message had broken too-small header length %u\n",
3633 header_len_unsigned);
3634 loader->corrupted = TRUE;
3638 if (header_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE ||
3639 body_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE)
3641 _dbus_verbose ("Header or body length too large (%u %u)\n",
3642 header_len_unsigned,
3644 loader->corrupted = TRUE;
3648 /* Now that we know the values are in signed range, get
3649 * rid of stupid unsigned, just causes bugs
3651 header_len = header_len_unsigned;
3652 body_len = body_len_unsigned;
3654 if (_DBUS_ALIGN_VALUE (header_len, 8) != header_len_unsigned)
3657 _dbus_verbose ("header length %d is not aligned to 8 bytes\n",
3659 loader->corrupted = TRUE;
3663 if (header_len + body_len > loader->max_message_size)
3665 _dbus_verbose ("Message claimed length header = %d body = %d exceeds max message length %ld\n",
3666 header_len, body_len, loader->max_message_size);
3667 loader->corrupted = TRUE;
3671 if (_dbus_string_get_length (&loader->data) >= (header_len + body_len))
3673 HeaderField fields[FIELD_LAST];
3678 _dbus_verbose_bytes_of_string (&loader->data, 0, header_len + body_len);
3680 if (!decode_header_data (&loader->data, header_len, byte_order,
3681 fields, &header_padding))
3683 _dbus_verbose ("Header was invalid\n");
3684 loader->corrupted = TRUE;
3688 next_arg = header_len;
3689 while (next_arg < (header_len + body_len))
3692 int prev = next_arg;
3694 if (!_dbus_marshal_validate_type (&loader->data, next_arg,
3697 _dbus_verbose ("invalid typecode at offset %d\n", prev);
3698 loader->corrupted = TRUE;
3702 if (!_dbus_marshal_validate_arg (&loader->data,
3708 _dbus_verbose ("invalid type data at %d, next_arg\n", next_arg);
3709 loader->corrupted = TRUE;
3713 _dbus_assert (next_arg > prev);
3716 if (next_arg > (header_len + body_len))
3718 _dbus_verbose ("end of last arg at %d but message has len %d+%d=%d\n",
3719 next_arg, header_len, body_len,
3720 header_len + body_len);
3721 loader->corrupted = TRUE;
3725 message = dbus_message_new_empty_header ();
3726 if (message == NULL)
3729 message->byte_order = byte_order;
3730 message->header_padding = header_padding;
3732 /* Copy in the offsets we found */
3734 while (i < FIELD_LAST)
3736 message->header_fields[i] = fields[i];
3740 if (!_dbus_list_append (&loader->messages, message))
3742 dbus_message_unref (message);
3746 _dbus_assert (_dbus_string_get_length (&message->header) == 0);
3747 _dbus_assert (_dbus_string_get_length (&message->body) == 0);
3749 _dbus_assert (_dbus_string_get_length (&loader->data) >=
3750 (header_len + body_len));
3752 if (!_dbus_string_move_len (&loader->data, 0, header_len, &message->header, 0))
3754 _dbus_list_remove_last (&loader->messages, message);
3755 dbus_message_unref (message);
3759 if (!_dbus_string_move_len (&loader->data, 0, body_len, &message->body, 0))
3763 /* put the header back, we'll try again later */
3764 result = _dbus_string_copy_len (&message->header, 0, header_len,
3766 _dbus_assert (result); /* because DBusString never reallocs smaller */
3768 _dbus_list_remove_last (&loader->messages, message);
3769 dbus_message_unref (message);
3773 _dbus_assert (_dbus_string_get_length (&message->header) == header_len);
3774 _dbus_assert (_dbus_string_get_length (&message->body) == body_len);
3776 /* Fill in caches */
3777 message->reply_serial = get_int_field (message,
3778 FIELD_REPLY_SERIAL);
3779 message->client_serial = get_int_field (message,
3780 FIELD_CLIENT_SERIAL);
3782 _dbus_verbose ("Loaded message %p\n", message);
3792 * Peeks at first loaded message, returns #NULL if no messages have
3795 * @param loader the loader.
3796 * @returns the next message, or #NULL if none.
3799 _dbus_message_loader_peek_message (DBusMessageLoader *loader)
3801 if (loader->messages)
3802 return loader->messages->data;
3808 * Pops a loaded message (passing ownership of the message
3809 * to the caller). Returns #NULL if no messages have been
3812 * @param loader the loader.
3813 * @returns the next message, or #NULL if none.
3816 _dbus_message_loader_pop_message (DBusMessageLoader *loader)
3818 return _dbus_list_pop_first (&loader->messages);
3822 * Pops a loaded message inside a list link (passing ownership of the
3823 * message and link to the caller). Returns #NULL if no messages have
3826 * @param loader the loader.
3827 * @returns the next message link, or #NULL if none.
3830 _dbus_message_loader_pop_message_link (DBusMessageLoader *loader)
3832 return _dbus_list_pop_first_link (&loader->messages);
3836 * Checks whether the loader is confused due to bad data.
3837 * If messages are received that are invalid, the
3838 * loader gets confused and gives up permanently.
3839 * This state is called "corrupted."
3841 * @param loader the loader
3842 * @returns #TRUE if the loader is hosed.
3845 _dbus_message_loader_get_is_corrupted (DBusMessageLoader *loader)
3847 return loader->corrupted;
3851 * Sets the maximum size message we allow.
3853 * @param loader the loader
3854 * @param size the max message size in bytes
3857 _dbus_message_loader_set_max_message_size (DBusMessageLoader *loader,
3860 if (size > MAX_SANE_MESSAGE_SIZE)
3862 _dbus_verbose ("clamping requested max message size %ld to %d\n",
3863 size, MAX_SANE_MESSAGE_SIZE);
3864 size = MAX_SANE_MESSAGE_SIZE;
3866 loader->max_message_size = size;
3870 * Gets the maximum allowed message size in bytes.
3872 * @param loader the loader
3873 * @returns max size in bytes
3876 _dbus_message_loader_get_max_message_size (DBusMessageLoader *loader)
3878 return loader->max_message_size;
3882 #ifdef DBUS_BUILD_TESTS
3883 #include "dbus-test.h"
3887 message_iter_test (DBusMessage *message)
3889 DBusMessageIter iter, dict, array;
3892 dbus_message_iter_init (message, &iter);
3895 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_STRING)
3896 _dbus_assert_not_reached ("Argument type isn't string");
3898 str = dbus_message_iter_get_string (&iter);
3899 if (strcmp (str, "Test string") != 0)
3900 _dbus_assert_not_reached ("Strings differ");
3903 if (!dbus_message_iter_next (&iter))
3904 _dbus_assert_not_reached ("Reached end of arguments");
3906 /* Signed integer tests */
3907 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_INT32)
3908 _dbus_assert_not_reached ("Argument type isn't int32");
3910 if (dbus_message_iter_get_int32 (&iter) != -0x12345678)
3911 _dbus_assert_not_reached ("Signed integers differ");
3913 if (!dbus_message_iter_next (&iter))
3914 _dbus_assert_not_reached ("Reached end of fields");
3916 /* Unsigned integer tests */
3917 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_UINT32)
3918 _dbus_assert_not_reached ("Argument type isn't int32");
3920 if (dbus_message_iter_get_uint32 (&iter) != 0xedd1e)
3921 _dbus_assert_not_reached ("Unsigned integers differ");
3923 if (!dbus_message_iter_next (&iter))
3924 _dbus_assert_not_reached ("Reached end of arguments");
3927 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DOUBLE)
3928 _dbus_assert_not_reached ("Argument type isn't double");
3930 if (dbus_message_iter_get_double (&iter) != 3.14159)
3931 _dbus_assert_not_reached ("Doubles differ");
3933 if (!dbus_message_iter_next (&iter))
3934 _dbus_assert_not_reached ("Reached end of arguments");
3936 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_ARRAY)
3937 _dbus_assert_not_reached ("Argument type not an array");
3939 if (dbus_message_iter_get_array_type (&iter) != DBUS_TYPE_UINT32)
3940 _dbus_assert_not_reached ("Array type not uint32");
3943 if (!dbus_message_iter_init_array_iterator (&iter, &array, NULL))
3944 _dbus_assert_not_reached ("Array init failed");
3946 if (dbus_message_iter_get_arg_type (&array) != DBUS_TYPE_UINT32)
3947 _dbus_assert_not_reached ("Argument type isn't int32");
3949 if (dbus_message_iter_get_uint32 (&array) != 0x12345678)
3950 _dbus_assert_not_reached ("Unsigned integers differ");
3952 if (!dbus_message_iter_next (&array))
3953 _dbus_assert_not_reached ("Reached end of arguments");
3955 if (dbus_message_iter_get_arg_type (&array) != DBUS_TYPE_UINT32)
3956 _dbus_assert_not_reached ("Argument type isn't int32");
3958 if (dbus_message_iter_get_uint32 (&array) != 0x23456781)
3959 _dbus_assert_not_reached ("Unsigned integers differ");
3961 if (dbus_message_iter_next (&array))
3962 _dbus_assert_not_reached ("Didn't reach end of arguments");
3964 if (!dbus_message_iter_next (&iter))
3965 _dbus_assert_not_reached ("Reached end of arguments");
3967 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DICT)
3968 _dbus_assert_not_reached ("not dict type");
3970 if (!dbus_message_iter_init_dict_iterator (&iter, &dict))
3971 _dbus_assert_not_reached ("dict iter failed");
3973 str = dbus_message_iter_get_dict_key (&dict);
3974 if (str == NULL || strcmp (str, "test") != 0)
3975 _dbus_assert_not_reached ("wrong dict key");
3978 if (dbus_message_iter_get_arg_type (&dict) != DBUS_TYPE_UINT32)
3979 _dbus_assert_not_reached ("wrong dict entry type");
3981 if (dbus_message_iter_get_uint32 (&dict) != 0xDEADBEEF)
3982 _dbus_assert_not_reached ("wrong dict entry value");
3984 if (dbus_message_iter_next (&dict))
3985 _dbus_assert_not_reached ("Didn't reach end of dict");
3987 if (!dbus_message_iter_next (&iter))
3988 _dbus_assert_not_reached ("Reached end of arguments");
3990 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_UINT32)
3991 _dbus_assert_not_reached ("wrong type after dict");
3993 if (dbus_message_iter_get_uint32 (&iter) != 0xCAFEBABE)
3994 _dbus_assert_not_reached ("wrong value after dict");
3996 if (dbus_message_iter_next (&iter))
3997 _dbus_assert_not_reached ("Didn't reach end of arguments");
4002 check_message_handling_type (DBusMessageIter *iter,
4005 DBusMessageIter child_iter;
4011 case DBUS_TYPE_BYTE:
4012 dbus_message_iter_get_byte (iter);
4014 case DBUS_TYPE_BOOLEAN:
4015 dbus_message_iter_get_boolean (iter);
4017 case DBUS_TYPE_INT32:
4018 dbus_message_iter_get_int32 (iter);
4020 case DBUS_TYPE_UINT32:
4021 dbus_message_iter_get_uint32 (iter);
4023 case DBUS_TYPE_DOUBLE:
4024 dbus_message_iter_get_double (iter);
4026 case DBUS_TYPE_STRING:
4029 str = dbus_message_iter_get_string (iter);
4032 _dbus_warn ("NULL string int message\n");
4038 case DBUS_TYPE_NAMED:
4041 unsigned char *data;
4044 name = dbus_message_iter_get_named (iter, &data, &len);
4047 _dbus_warn ("error reading name from named type\n");
4054 case DBUS_TYPE_ARRAY:
4058 if (!dbus_message_iter_init_array_iterator (iter, &child_iter, &array_type))
4060 _dbus_warn ("Failed to init array iterator\n");
4064 while (dbus_message_iter_has_next (&child_iter))
4066 if (!check_message_handling_type (&child_iter, array_type))
4068 _dbus_warn ("error in array element\n");
4072 if (!dbus_message_iter_next (&child_iter))
4077 case DBUS_TYPE_DICT:
4082 if (!dbus_message_iter_init_dict_iterator (iter, &child_iter))
4084 _dbus_warn ("Failed to init dict iterator\n");
4088 while ((entry_type = dbus_message_iter_get_arg_type (&child_iter)) != DBUS_TYPE_INVALID)
4090 key = dbus_message_iter_get_dict_key (&child_iter);
4093 _dbus_warn ("error reading dict key\n");
4098 if (!check_message_handling_type (&child_iter, entry_type))
4100 _dbus_warn ("error in dict value\n");
4104 if (!dbus_message_iter_next (&child_iter))
4111 _dbus_warn ("unknown type %d\n", type);
4120 check_message_handling (DBusMessage *message)
4122 DBusMessageIter iter;
4125 dbus_int32_t client_serial;
4129 client_serial = dbus_message_get_serial (message);
4131 /* can't use set_serial due to the assertions at the start of it */
4132 set_int_field (message, FIELD_CLIENT_SERIAL,
4135 if (client_serial != dbus_message_get_serial (message))
4137 _dbus_warn ("get/set cycle for client_serial did not succeed\n");
4141 /* If we implement message_set_arg (message, n, value)
4142 * then we would want to test it here
4145 dbus_message_iter_init (message, &iter);
4146 while ((type = dbus_message_iter_get_arg_type (&iter)) != DBUS_TYPE_INVALID)
4149 if (!check_message_handling_type (&iter, type))
4152 if (!dbus_message_iter_next (&iter))
4163 check_have_valid_message (DBusMessageLoader *loader)
4165 DBusMessage *message;
4171 if (!_dbus_message_loader_queue_messages (loader))
4172 _dbus_assert_not_reached ("no memory to queue messages");
4174 if (_dbus_message_loader_get_is_corrupted (loader))
4176 _dbus_warn ("loader corrupted on message that was expected to be valid\n");
4180 message = _dbus_message_loader_pop_message (loader);
4181 if (message == NULL)
4183 _dbus_warn ("didn't load message that was expected to be valid (message not popped)\n");
4187 if (_dbus_string_get_length (&loader->data) > 0)
4189 _dbus_warn ("had leftover bytes from expected-to-be-valid single message\n");
4193 /* Verify that we're able to properly deal with the message.
4194 * For example, this would detect improper handling of messages
4195 * in nonstandard byte order.
4197 if (!check_message_handling (message))
4204 dbus_message_unref (message);
4210 check_invalid_message (DBusMessageLoader *loader)
4216 if (!_dbus_message_loader_queue_messages (loader))
4217 _dbus_assert_not_reached ("no memory to queue messages");
4219 if (!_dbus_message_loader_get_is_corrupted (loader))
4221 _dbus_warn ("loader not corrupted on message that was expected to be invalid\n");
4232 check_incomplete_message (DBusMessageLoader *loader)
4234 DBusMessage *message;
4240 if (!_dbus_message_loader_queue_messages (loader))
4241 _dbus_assert_not_reached ("no memory to queue messages");
4243 if (_dbus_message_loader_get_is_corrupted (loader))
4245 _dbus_warn ("loader corrupted on message that was expected to be valid (but incomplete)\n");
4249 message = _dbus_message_loader_pop_message (loader);
4250 if (message != NULL)
4252 _dbus_warn ("loaded message that was expected to be incomplete\n");
4260 dbus_message_unref (message);
4265 check_loader_results (DBusMessageLoader *loader,
4266 DBusMessageValidity validity)
4268 if (!_dbus_message_loader_queue_messages (loader))
4269 _dbus_assert_not_reached ("no memory to queue messages");
4273 case _DBUS_MESSAGE_VALID:
4274 return check_have_valid_message (loader);
4275 case _DBUS_MESSAGE_INVALID:
4276 return check_invalid_message (loader);
4277 case _DBUS_MESSAGE_INCOMPLETE:
4278 return check_incomplete_message (loader);
4279 case _DBUS_MESSAGE_UNKNOWN:
4283 _dbus_assert_not_reached ("bad DBusMessageValidity");
4289 * Loads the message in the given message file.
4291 * @param filename filename to load
4292 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
4293 * @param data string to load message into
4294 * @returns #TRUE if the message was loaded
4297 dbus_internal_do_not_use_load_message_file (const DBusString *filename,
4309 _dbus_verbose ("Loading raw %s\n", _dbus_string_get_const_data (filename));
4310 dbus_error_init (&error);
4311 if (!_dbus_file_get_contents (data, filename, &error))
4313 _dbus_warn ("Could not load message file %s: %s\n",
4314 _dbus_string_get_const_data (filename),
4316 dbus_error_free (&error);
4322 if (!_dbus_message_data_load (data, filename))
4324 _dbus_warn ("Could not load message file %s\n",
4325 _dbus_string_get_const_data (filename));
4338 * Tries loading the message in the given message file
4339 * and verifies that DBusMessageLoader can handle it.
4341 * @param filename filename to load
4342 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
4343 * @param expected_validity what the message has to be like to return #TRUE
4344 * @returns #TRUE if the message has the expected validity
4347 dbus_internal_do_not_use_try_message_file (const DBusString *filename,
4349 DBusMessageValidity expected_validity)
4356 if (!_dbus_string_init (&data))
4357 _dbus_assert_not_reached ("could not allocate string\n");
4359 if (!dbus_internal_do_not_use_load_message_file (filename, is_raw,
4363 retval = dbus_internal_do_not_use_try_message_data (&data, expected_validity);
4369 if (_dbus_string_get_length (&data) > 0)
4370 _dbus_verbose_bytes_of_string (&data, 0,
4371 _dbus_string_get_length (&data));
4373 _dbus_warn ("Failed message loader test on %s\n",
4374 _dbus_string_get_const_data (filename));
4377 _dbus_string_free (&data);
4383 * Tries loading the given message data.
4386 * @param data the message data
4387 * @param expected_validity what the message has to be like to return #TRUE
4388 * @returns #TRUE if the message has the expected validity
4391 dbus_internal_do_not_use_try_message_data (const DBusString *data,
4392 DBusMessageValidity expected_validity)
4394 DBusMessageLoader *loader;
4402 /* Write the data one byte at a time */
4404 loader = _dbus_message_loader_new ();
4406 len = _dbus_string_get_length (data);
4407 for (i = 0; i < len; i++)
4411 _dbus_message_loader_get_buffer (loader, &buffer);
4412 _dbus_string_append_byte (buffer,
4413 _dbus_string_get_byte (data, i));
4414 _dbus_message_loader_return_buffer (loader, buffer, 1);
4417 if (!check_loader_results (loader, expected_validity))
4420 _dbus_message_loader_unref (loader);
4423 /* Write the data all at once */
4425 loader = _dbus_message_loader_new ();
4430 _dbus_message_loader_get_buffer (loader, &buffer);
4431 _dbus_string_copy (data, 0, buffer,
4432 _dbus_string_get_length (buffer));
4433 _dbus_message_loader_return_buffer (loader, buffer, 1);
4436 if (!check_loader_results (loader, expected_validity))
4439 _dbus_message_loader_unref (loader);
4442 /* Write the data 2 bytes at a time */
4444 loader = _dbus_message_loader_new ();
4446 len = _dbus_string_get_length (data);
4447 for (i = 0; i < len; i += 2)
4451 _dbus_message_loader_get_buffer (loader, &buffer);
4452 _dbus_string_append_byte (buffer,
4453 _dbus_string_get_byte (data, i));
4455 _dbus_string_append_byte (buffer,
4456 _dbus_string_get_byte (data, i+1));
4457 _dbus_message_loader_return_buffer (loader, buffer, 1);
4460 if (!check_loader_results (loader, expected_validity))
4463 _dbus_message_loader_unref (loader);
4471 _dbus_message_loader_unref (loader);
4477 process_test_subdir (const DBusString *test_base_dir,
4479 DBusMessageValidity validity,
4480 DBusForeachMessageFileFunc function,
4483 DBusString test_directory;
4484 DBusString filename;
4492 if (!_dbus_string_init (&test_directory))
4493 _dbus_assert_not_reached ("didn't allocate test_directory\n");
4495 _dbus_string_init_const (&filename, subdir);
4497 if (!_dbus_string_copy (test_base_dir, 0,
4498 &test_directory, 0))
4499 _dbus_assert_not_reached ("couldn't copy test_base_dir to test_directory");
4501 if (!_dbus_concat_dir_and_file (&test_directory, &filename))
4502 _dbus_assert_not_reached ("couldn't allocate full path");
4504 _dbus_string_free (&filename);
4505 if (!_dbus_string_init (&filename))
4506 _dbus_assert_not_reached ("didn't allocate filename string\n");
4508 dbus_error_init (&error);
4509 dir = _dbus_directory_open (&test_directory, &error);
4512 _dbus_warn ("Could not open %s: %s\n",
4513 _dbus_string_get_const_data (&test_directory),
4515 dbus_error_free (&error);
4519 printf ("Testing:\n");
4522 while (_dbus_directory_get_next_file (dir, &filename, &error))
4524 DBusString full_path;
4527 if (!_dbus_string_init (&full_path))
4528 _dbus_assert_not_reached ("couldn't init string");
4530 if (!_dbus_string_copy (&test_directory, 0, &full_path, 0))
4531 _dbus_assert_not_reached ("couldn't copy dir to full_path");
4533 if (!_dbus_concat_dir_and_file (&full_path, &filename))
4534 _dbus_assert_not_reached ("couldn't concat file to dir");
4536 if (_dbus_string_ends_with_c_str (&filename, ".message"))
4538 else if (_dbus_string_ends_with_c_str (&filename, ".message-raw"))
4542 _dbus_verbose ("Skipping non-.message file %s\n",
4543 _dbus_string_get_const_data (&filename));
4544 _dbus_string_free (&full_path);
4549 _dbus_string_get_const_data (&filename));
4551 _dbus_verbose (" expecting %s\n",
4552 validity == _DBUS_MESSAGE_VALID ? "valid" :
4553 (validity == _DBUS_MESSAGE_INVALID ? "invalid" :
4554 (validity == _DBUS_MESSAGE_INCOMPLETE ? "incomplete" : "unknown")));
4556 if (! (*function) (&full_path, is_raw, validity, user_data))
4558 _dbus_string_free (&full_path);
4562 _dbus_string_free (&full_path);
4565 if (dbus_error_is_set (&error))
4567 _dbus_warn ("Could not get next file in %s: %s\n",
4568 _dbus_string_get_const_data (&test_directory),
4570 dbus_error_free (&error);
4579 _dbus_directory_close (dir);
4580 _dbus_string_free (&test_directory);
4581 _dbus_string_free (&filename);
4587 * Runs the given function on every message file in the test suite.
4588 * The function should return #FALSE on test failure or fatal error.
4590 * @param test_data_dir root dir of the test suite data files (top_srcdir/test/data)
4591 * @param func the function to run
4592 * @param user_data data for function
4593 * @returns #FALSE if there's a failure
4596 dbus_internal_do_not_use_foreach_message_file (const char *test_data_dir,
4597 DBusForeachMessageFileFunc func,
4600 DBusString test_directory;
4605 _dbus_string_init_const (&test_directory, test_data_dir);
4607 if (!process_test_subdir (&test_directory, "valid-messages",
4608 _DBUS_MESSAGE_VALID, func, user_data))
4611 if (!process_test_subdir (&test_directory, "invalid-messages",
4612 _DBUS_MESSAGE_INVALID, func, user_data))
4615 if (!process_test_subdir (&test_directory, "incomplete-messages",
4616 _DBUS_MESSAGE_INCOMPLETE, func, user_data))
4623 _dbus_string_free (&test_directory);
4629 verify_test_message (DBusMessage *message)
4631 dbus_int32_t our_int;
4634 dbus_bool_t our_bool;
4635 dbus_int32_t *our_int_array;
4636 int our_int_array_len;
4637 DBusMessageIter iter, dict;
4640 dbus_message_iter_init (message, &iter);
4642 dbus_error_init (&error);
4643 if (!dbus_message_iter_get_args (&iter, &error,
4644 DBUS_TYPE_INT32, &our_int,
4645 DBUS_TYPE_STRING, &our_str,
4646 DBUS_TYPE_DOUBLE, &our_double,
4647 DBUS_TYPE_BOOLEAN, &our_bool,
4648 DBUS_TYPE_ARRAY, DBUS_TYPE_UINT32, &our_int_array, &our_int_array_len,
4651 _dbus_verbose ("error: %s - %s\n", error.name, (error.message != NULL)?error.message: "no message");
4652 _dbus_assert_not_reached ("Could not get arguments");
4655 if (our_int != -0x12345678)
4656 _dbus_assert_not_reached ("integers differ!");
4658 if (our_double != 3.14159)
4659 _dbus_assert_not_reached ("doubles differ!");
4661 if (strcmp (our_str, "Test string") != 0)
4662 _dbus_assert_not_reached ("strings differ!");
4663 dbus_free (our_str);
4666 _dbus_assert_not_reached ("booleans differ");
4668 if (our_int_array_len != 4 ||
4669 our_int_array[0] != 0x12345678 ||
4670 our_int_array[1] != 0x23456781 ||
4671 our_int_array[2] != 0x34567812 ||
4672 our_int_array[3] != 0x45678123)
4673 _dbus_assert_not_reached ("array differ");
4674 dbus_free (our_int_array);
4676 if (!dbus_message_iter_next (&iter))
4677 _dbus_assert_not_reached ("Reached end of arguments");
4679 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_DICT)
4680 _dbus_assert_not_reached ("not dict type");
4682 if (!dbus_message_iter_init_dict_iterator (&iter, &dict))
4683 _dbus_assert_not_reached ("dict iter failed");
4685 our_str = dbus_message_iter_get_dict_key (&dict);
4686 if (our_str == NULL || strcmp (our_str, "test") != 0)
4687 _dbus_assert_not_reached ("wrong dict key");
4688 dbus_free (our_str);
4690 if (dbus_message_iter_get_arg_type (&dict) != DBUS_TYPE_UINT32)
4692 _dbus_verbose ("dict entry type: %d\n", dbus_message_iter_get_arg_type (&dict));
4693 _dbus_assert_not_reached ("wrong dict entry type");
4696 if (dbus_message_iter_get_uint32 (&dict) != 0xDEADBEEF)
4697 _dbus_assert_not_reached ("wrong dict entry value");
4699 if (dbus_message_iter_next (&dict))
4700 _dbus_assert_not_reached ("Didn't reach end of dict");
4702 if (!dbus_message_iter_next (&iter))
4703 _dbus_assert_not_reached ("Reached end of arguments");
4705 if (dbus_message_iter_get_arg_type (&iter) != DBUS_TYPE_UINT32)
4706 _dbus_assert_not_reached ("wrong type after dict");
4708 if (dbus_message_iter_get_uint32 (&iter) != 0xCAFEBABE)
4709 _dbus_assert_not_reached ("wrong value after dict");
4711 if (dbus_message_iter_next (&iter))
4712 _dbus_assert_not_reached ("Didn't reach end of arguments");
4716 * @ingroup DBusMessageInternals
4717 * Unit test for DBusMessage.
4719 * @returns #TRUE on success.
4722 _dbus_message_test (const char *test_data_dir)
4724 DBusMessage *message;
4725 DBusMessageLoader *loader;
4726 DBusMessageIter iter, child_iter;
4732 const dbus_uint32_t our_int32_array[] = { 0x12345678, 0x23456781, 0x34567812, 0x45678123 };
4735 _dbus_assert (sizeof (DBusMessageRealIter) == sizeof (DBusMessageIter));
4737 /* Test the vararg functions */
4738 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
4739 _dbus_message_set_serial (message, 1);
4740 dbus_message_append_args (message,
4741 DBUS_TYPE_INT32, -0x12345678,
4742 DBUS_TYPE_STRING, "Test string",
4743 DBUS_TYPE_DOUBLE, 3.14159,
4744 DBUS_TYPE_BOOLEAN, TRUE,
4745 DBUS_TYPE_ARRAY, DBUS_TYPE_UINT32, our_int32_array, 4,
4748 dbus_message_append_iter_init (message, &iter);
4749 dbus_message_iter_append_dict (&iter, &child_iter);
4750 dbus_message_iter_append_dict_key (&child_iter, "test");
4751 dbus_message_iter_append_uint32 (&child_iter, 0xDEADBEEF);
4752 dbus_message_iter_append_uint32 (&iter, 0xCAFEBABE);
4754 _dbus_verbose_bytes_of_string (&message->header, 0,
4755 _dbus_string_get_length (&message->header));
4756 _dbus_verbose_bytes_of_string (&message->body, 0,
4757 _dbus_string_get_length (&message->body));
4759 verify_test_message (message);
4761 copy = dbus_message_copy (message);
4763 _dbus_assert (message->client_serial == copy->client_serial);
4764 _dbus_assert (message->reply_serial == copy->reply_serial);
4765 _dbus_assert (message->header_padding == copy->header_padding);
4767 _dbus_assert (_dbus_string_get_length (&message->header) ==
4768 _dbus_string_get_length (©->header));
4770 _dbus_assert (_dbus_string_get_length (&message->body) ==
4771 _dbus_string_get_length (©->body));
4773 verify_test_message (copy);
4775 name1 = dbus_message_get_name (message);
4776 name2 = dbus_message_get_name (copy);
4778 _dbus_assert (strcmp (name1, name2) == 0);
4780 dbus_message_unref (message);
4781 dbus_message_unref (copy);
4783 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
4784 _dbus_message_set_serial (message, 1);
4785 dbus_message_set_reply_serial (message, 0x12345678);
4787 dbus_message_append_iter_init (message, &iter);
4788 dbus_message_iter_append_string (&iter, "Test string");
4789 dbus_message_iter_append_int32 (&iter, -0x12345678);
4790 dbus_message_iter_append_uint32 (&iter, 0xedd1e);
4791 dbus_message_iter_append_double (&iter, 3.14159);
4793 dbus_message_iter_append_array (&iter, &child_iter, DBUS_TYPE_UINT32);
4794 dbus_message_iter_append_uint32 (&child_iter, 0x12345678);
4795 dbus_message_iter_append_uint32 (&child_iter, 0x23456781);
4797 dbus_message_iter_append_dict (&iter, &child_iter);
4798 dbus_message_iter_append_dict_key (&child_iter, "test");
4799 dbus_message_iter_append_uint32 (&child_iter, 0xDEADBEEF);
4800 dbus_message_iter_append_uint32 (&iter, 0xCAFEBABE);
4802 message_iter_test (message);
4804 /* Message loader test */
4805 _dbus_message_lock (message);
4806 loader = _dbus_message_loader_new ();
4808 /* Write the header data one byte at a time */
4809 data = _dbus_string_get_const_data (&message->header);
4810 for (i = 0; i < _dbus_string_get_length (&message->header); i++)
4814 _dbus_message_loader_get_buffer (loader, &buffer);
4815 _dbus_string_append_byte (buffer, data[i]);
4816 _dbus_message_loader_return_buffer (loader, buffer, 1);
4819 /* Write the body data one byte at a time */
4820 data = _dbus_string_get_const_data (&message->body);
4821 for (i = 0; i < _dbus_string_get_length (&message->body); i++)
4825 _dbus_message_loader_get_buffer (loader, &buffer);
4826 _dbus_string_append_byte (buffer, data[i]);
4827 _dbus_message_loader_return_buffer (loader, buffer, 1);
4830 dbus_message_unref (message);
4832 /* Now pop back the message */
4833 if (!_dbus_message_loader_queue_messages (loader))
4834 _dbus_assert_not_reached ("no memory to queue messages");
4836 if (_dbus_message_loader_get_is_corrupted (loader))
4837 _dbus_assert_not_reached ("message loader corrupted");
4839 message = _dbus_message_loader_pop_message (loader);
4841 _dbus_assert_not_reached ("received a NULL message");
4843 if (dbus_message_get_reply_serial (message) != 0x12345678)
4844 _dbus_assert_not_reached ("reply serial fields differ");
4846 message_iter_test (message);
4848 dbus_message_unref (message);
4849 _dbus_message_loader_unref (loader);
4851 /* Now load every message in test_data_dir if we have one */
4852 if (test_data_dir == NULL)
4855 return dbus_internal_do_not_use_foreach_message_file (test_data_dir,
4856 (DBusForeachMessageFileFunc)
4857 dbus_internal_do_not_use_try_message_file,
4861 #endif /* DBUS_BUILD_TESTS */