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 int 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"
94 int header_padding; /**< bytes of alignment in header */
96 DBusString body; /**< Body network data. */
98 char byte_order; /**< Message byte order. */
100 DBusCounter *size_counter; /**< Counter for the size of the message, or #NULL */
101 long size_counter_delta; /**< Size we incremented the size counter by. */
103 unsigned int locked : 1; /**< Message being sent, no modifications allowed. */
107 * @brief Internals of DBusMessageIter
109 * Object representing a position in a message. All fields are internal.
111 struct DBusMessageIter
113 int refcount; /**< Reference count */
115 int pos; /**< Current position in the string */
117 DBusMessage *message; /**< Message used */
121 * Gets the data to be sent over the network for this message.
122 * The header and then the body should be written out.
123 * This function is guaranteed to always return the same
124 * data once a message is locked (with _dbus_message_lock()).
126 * @param message the message.
127 * @param header return location for message header data.
128 * @param body return location for message body data.
131 _dbus_message_get_network_data (DBusMessage *message,
132 const DBusString **header,
133 const DBusString **body)
135 _dbus_assert (message->locked);
137 *header = &message->header;
138 *body = &message->body;
142 clear_header_padding (DBusMessage *message)
144 _dbus_string_shorten (&message->header,
145 message->header_padding);
146 message->header_padding = 0;
150 append_header_padding (DBusMessage *message)
153 old_len = _dbus_string_get_length (&message->header);
154 if (!_dbus_string_align_length (&message->header, 8))
157 message->header_padding = _dbus_string_get_length (&message->header) - old_len;
163 adjust_field_offsets (DBusMessage *message,
173 while (i < FIELD_LAST)
175 if (message->header_fields[i].offset > offsets_after)
176 message->header_fields[i].offset += delta;
183 get_string_field (DBusMessage *message,
187 int offset = message->header_fields[field].offset;
193 /* offset points to string length, string data follows it */
194 /* FIXME _dbus_demarshal_const_string() that returned
195 * a reference to the string plus its len might be nice.
199 *len = _dbus_demarshal_uint32 (&message->header,
204 _dbus_string_get_const_data (&message->header,
207 return data + (offset + 4);
211 get_int_field (DBusMessage *message,
214 int offset = message->header_fields[field].offset;
217 return -1; /* useless if -1 is a valid value of course */
219 return _dbus_demarshal_int32 (&message->header,
226 append_int_field (DBusMessage *message,
233 _dbus_assert (!message->locked);
235 clear_header_padding (message);
237 orig_len = _dbus_string_get_length (&message->header);
239 if (!_dbus_string_align_length (&message->header, 4))
242 if (!_dbus_string_append_len (&message->header, name, 4))
245 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_INT32))
248 if (!_dbus_string_align_length (&message->header, 4))
251 message->header_fields[FIELD_REPLY_SERIAL].offset =
252 _dbus_string_get_length (&message->header);
254 if (!_dbus_marshal_int32 (&message->header, message->byte_order,
258 if (!append_header_padding (message))
264 message->header_fields[field].offset = -1;
265 _dbus_string_set_length (&message->header, orig_len);
267 /* this must succeed because it was allocated on function entry and
268 * DBusString doesn't ever realloc smaller
270 if (!append_header_padding (message))
271 _dbus_assert_not_reached ("failed to reappend header padding");
276 append_string_field (DBusMessage *message,
283 _dbus_assert (!message->locked);
285 clear_header_padding (message);
287 orig_len = _dbus_string_get_length (&message->header);
289 if (!_dbus_string_align_length (&message->header, 4))
292 if (!_dbus_string_append_len (&message->header, name, 4))
295 if (!_dbus_string_append_byte (&message->header, DBUS_TYPE_STRING))
298 if (!_dbus_string_align_length (&message->header, 4))
301 message->header_fields[field].offset =
302 _dbus_string_get_length (&message->header);
304 if (!_dbus_marshal_string (&message->header, message->byte_order,
308 if (!append_header_padding (message))
314 message->header_fields[field].offset = -1;
315 _dbus_string_set_length (&message->header, orig_len);
317 /* this must succeed because it was allocated on function entry and
318 * DBusString doesn't ever realloc smaller
320 if (!append_header_padding (message))
321 _dbus_assert_not_reached ("failed to reappend header padding");
327 delete_int_field (DBusMessage *message,
330 int offset = message->header_fields[field].offset;
332 _dbus_assert (!message->locked);
333 _dbus_assert (field_is_named[field]);
338 clear_header_padding (message);
340 /* The field typecode and name take up 8 bytes */
341 _dbus_string_delete (&message->header,
345 message->header_fields[field].offset = -1;
347 adjust_field_offsets (message,
351 append_header_padding (message);
355 delete_string_field (DBusMessage *message,
358 int offset = message->header_fields[field].offset;
362 _dbus_assert (!message->locked);
363 _dbus_assert (field_is_named[field]);
368 clear_header_padding (message);
370 get_string_field (message, field, &len);
372 /* The field typecode and name take up 8 bytes, and the nul
373 * termination is 1 bytes, string length integer is 4 bytes
375 delete_len = 8 + 4 + 1 + len;
377 _dbus_string_delete (&message->header,
381 message->header_fields[field].offset = -1;
383 adjust_field_offsets (message,
387 append_header_padding (message);
391 set_int_field (DBusMessage *message,
395 int offset = message->header_fields[field].offset;
397 _dbus_assert (!message->locked);
401 /* need to append the field */
405 case FIELD_REPLY_SERIAL:
406 return append_int_field (message, field,
407 DBUS_HEADER_FIELD_REPLY,
410 _dbus_assert_not_reached ("appending an int field we don't support appending");
416 _dbus_marshal_set_int32 (&message->header,
425 set_uint_field (DBusMessage *message,
429 int offset = message->header_fields[field].offset;
431 _dbus_assert (!message->locked);
435 /* need to append the field */
440 _dbus_assert_not_reached ("appending a uint field we don't support appending");
446 _dbus_marshal_set_uint32 (&message->header,
455 set_string_field (DBusMessage *message,
459 int offset = message->header_fields[field].offset;
461 _dbus_assert (!message->locked);
462 _dbus_assert (value != NULL);
466 /* need to append the field */
471 return append_string_field (message, field,
472 DBUS_HEADER_FIELD_SENDER,
475 _dbus_assert_not_reached ("appending a string field we don't support appending");
485 old_len = _dbus_string_get_length (&message->header);
487 _dbus_string_init_const_len (&v, value,
488 strlen (value) + 1); /* include nul */
489 if (!_dbus_marshal_set_string (&message->header,
494 new_len = _dbus_string_get_length (&message->header);
496 adjust_field_offsets (message,
505 * Sets the client serial of a message.
506 * This can only be done once on a message.
508 * @todo client_serial should be called simply
509 * "serial"; it's in outgoing messages for both
510 * the client and the server, it's only client-specific
511 * in the message bus case. It's more like origin_serial
514 * @param message the message
515 * @param client_serial the client serial
518 _dbus_message_set_client_serial (DBusMessage *message,
519 dbus_int32_t client_serial)
521 _dbus_assert (!message->locked);
522 _dbus_assert (_dbus_message_get_client_serial (message) < 0);
524 set_int_field (message, FIELD_CLIENT_SERIAL,
529 * Sets the reply serial of a message (the client serial
530 * of the message this is a reply to).
532 * @param message the message
533 * @param reply_serial the client serial
534 * @returns #FALSE if not enough memory
537 _dbus_message_set_reply_serial (DBusMessage *message,
538 dbus_int32_t reply_serial)
540 _dbus_assert (!message->locked);
542 return set_int_field (message, FIELD_REPLY_SERIAL,
547 * Returns the client serial of a message or
548 * -1 if none has been specified.
550 * @todo see note in _dbus_message_set_client_serial()
551 * about how client_serial is a misnomer
553 * @todo this function should be public, after renaming it.
555 * @param message the message
556 * @returns the client serial
559 _dbus_message_get_client_serial (DBusMessage *message)
561 return get_int_field (message, FIELD_CLIENT_SERIAL);
565 * Returns the serial that the message is
566 * a reply to or -1 if none.
568 * @param message the message
569 * @returns the reply serial
572 _dbus_message_get_reply_serial (DBusMessage *message)
574 return get_int_field (message, FIELD_REPLY_SERIAL);
578 * Adds a counter to be incremented immediately with the
579 * size of this message, and decremented by the size
580 * of this message when this message if finalized.
582 * @param message the message
583 * @param counter the counter
586 _dbus_message_add_size_counter (DBusMessage *message,
587 DBusCounter *counter)
589 _dbus_assert (message->size_counter == NULL); /* If this fails we may need to keep a list of
590 * counters instead of just one
593 message->size_counter = counter;
594 _dbus_counter_ref (message->size_counter);
596 /* When we can change message size, we may want to
597 * update this each time we do so, or we may want to
598 * just KISS like this.
600 message->size_counter_delta =
601 _dbus_string_get_length (&message->header) +
602 _dbus_string_get_length (&message->body);
604 _dbus_verbose ("message has size %ld\n",
605 message->size_counter_delta);
607 _dbus_counter_adjust (message->size_counter, message->size_counter_delta);
611 dbus_message_create_header (DBusMessage *message,
617 if (!_dbus_string_append_byte (&message->header, message->byte_order))
621 if (!_dbus_string_append_byte (&message->header, flags))
624 if (!_dbus_string_append_byte (&message->header, DBUS_MAJOR_PROTOCOL_VERSION))
627 if (!_dbus_string_append_byte (&message->header, 0))
630 message->header_fields[FIELD_HEADER_LENGTH].offset = 4;
631 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
634 message->header_fields[FIELD_BODY_LENGTH].offset = 8;
635 if (!_dbus_marshal_uint32 (&message->header, message->byte_order, 0))
638 message->header_fields[FIELD_CLIENT_SERIAL].offset = 12;
639 if (!_dbus_marshal_int32 (&message->header, message->byte_order, -1))
642 /* Marshal message service */
645 if (!append_string_field (message,
647 DBUS_HEADER_FIELD_SERVICE,
652 _dbus_assert (name != NULL);
653 if (!append_string_field (message,
655 DBUS_HEADER_FIELD_NAME,
663 * Locks a message. Allows checking that applications don't keep a
664 * reference to a message in the outgoing queue and change it
665 * underneath us. Messages are locked when they enter the outgoing
666 * queue (dbus_connection_send_message()), and the library complains
667 * if the message is modified while locked.
669 * @param message the message to lock.
672 _dbus_message_lock (DBusMessage *message)
674 if (!message->locked)
676 /* Fill in our lengths */
677 set_uint_field (message,
679 _dbus_string_get_length (&message->header));
681 set_uint_field (message,
683 _dbus_string_get_length (&message->body));
685 message->locked = TRUE;
692 * @defgroup DBusMessage DBusMessage
694 * @brief Message to be sent or received over a DBusConnection.
696 * A DBusMessage is the most basic unit of communication over a
697 * DBusConnection. A DBusConnection represents a stream of messages
698 * received from a remote application, and a stream of messages
699 * sent to a remote application.
705 * @typedef DBusMessage
707 * Opaque data type representing a message received from or to be
708 * sent to another application.
712 dbus_message_new_empty_header (void)
714 DBusMessage *message;
717 message = dbus_new0 (DBusMessage, 1);
721 message->refcount = 1;
722 message->byte_order = DBUS_COMPILER_BYTE_ORDER;
725 while (i < FIELD_LAST)
727 message->header_fields[i].offset = -1;
731 if (!_dbus_string_init (&message->header, _DBUS_INT_MAX))
737 if (!_dbus_string_init (&message->body, _DBUS_INT_MAX))
739 _dbus_string_free (&message->header);
749 * Constructs a new message. Returns #NULL if memory can't be
750 * allocated for the message. The service may be #NULL in which case
751 * no service is set; this is appropriate when using D-BUS in a
752 * peer-to-peer context (no message bus).
754 * @todo reverse the arguments, first 'name' then 'service'
755 * as 'name' is more fundamental
757 * @param service service that the message should be sent to or #NULL
758 * @param name name of the message
759 * @returns a new DBusMessage, free with dbus_message_unref()
760 * @see dbus_message_unref()
763 dbus_message_new (const char *service,
766 DBusMessage *message;
768 message = dbus_message_new_empty_header ();
772 if (!dbus_message_create_header (message, service, name))
774 dbus_message_unref (message);
782 * Constructs a message that is a reply to some other
783 * message. Returns #NULL if memory can't be allocated
786 * @param original_message the message which the created
787 * message is a reply to.
788 * @returns a new DBusMessage, free with dbus_message_unref()
789 * @see dbus_message_new(), dbus_message_unref()
792 dbus_message_new_reply (DBusMessage *original_message)
794 DBusMessage *message;
795 const char *sender, *name;
797 sender = get_string_field (original_message,
799 name = get_string_field (original_message,
802 _dbus_assert (sender != NULL);
804 message = dbus_message_new (sender, name);
809 if (!_dbus_message_set_reply_serial (message,
810 _dbus_message_get_client_serial (original_message)))
812 dbus_message_unref (message);
820 * Creates a new message that is an exact replica of the message
821 * specified, except that its refcount is set to 1.
823 * @param message the message.
824 * @returns the new message.
827 dbus_message_new_from_message (const DBusMessage *message)
832 retval = dbus_new0 (DBusMessage, 1);
836 retval->refcount = 1;
837 retval->byte_order = message->byte_order;
839 if (!_dbus_string_init (&retval->header, _DBUS_INT_MAX))
845 if (!_dbus_string_init (&retval->body, _DBUS_INT_MAX))
847 _dbus_string_free (&retval->header);
852 if (!_dbus_string_copy (&message->header, 0,
855 _dbus_string_free (&retval->header);
856 _dbus_string_free (&retval->body);
862 if (!_dbus_string_copy (&message->body, 0,
865 _dbus_string_free (&retval->header);
866 _dbus_string_free (&retval->body);
872 for (i = 0; i < FIELD_LAST; i++)
874 retval->header_fields[i].offset = message->header_fields[i].offset;
882 * Increments the reference count of a DBusMessage.
884 * @param message The message
885 * @see dbus_message_unref
888 dbus_message_ref (DBusMessage *message)
890 _dbus_assert (message->refcount > 0);
892 message->refcount += 1;
896 * Decrements the reference count of a DBusMessage.
898 * @param message The message
899 * @see dbus_message_ref
902 dbus_message_unref (DBusMessage *message)
904 _dbus_assert (message->refcount > 0);
906 message->refcount -= 1;
907 if (message->refcount == 0)
909 if (message->size_counter != NULL)
911 _dbus_counter_adjust (message->size_counter,
912 - message->size_counter_delta);
913 _dbus_counter_unref (message->size_counter);
916 _dbus_string_free (&message->header);
917 _dbus_string_free (&message->body);
924 * Gets the name of a message.
926 * @param message the message
927 * @returns the message name (should not be freed)
930 dbus_message_get_name (DBusMessage *message)
932 return get_string_field (message, FIELD_NAME, NULL);
936 * Gets the destination service of a message.
938 * @param message the message
939 * @returns the message destination service (should not be freed)
942 dbus_message_get_service (DBusMessage *message)
944 return get_string_field (message, FIELD_SERVICE, NULL);
948 * Appends fields to a message given a variable argument
949 * list. The variable argument list should contain the type
950 * of the argument followed by the value to add. Array values
951 * are specified by a pointer to the array followed by an int
952 * giving the length of the array. The list is terminated
955 * @param message the message
956 * @param first_argument_type type of the first argument
957 * @param ... value of first argument, list of additional type-value pairs
958 * @returns #TRUE on success
961 dbus_message_append_args (DBusMessage *message,
968 va_start (var_args, first_arg_type);
969 retval = dbus_message_append_args_valist (message,
978 * This function takes a va_list for use by language bindings
980 * @see dbus_message_append_args.
981 * @param message the message
982 * @param first_arg_type type of first argument
983 * @param var_args value of first argument, then list of type/value pairs
984 * @returns #TRUE on success
987 dbus_message_append_args_valist (DBusMessage *message,
993 old_len = _dbus_string_get_length (&message->body);
995 type = first_arg_type;
1001 case DBUS_TYPE_INT32:
1002 if (!dbus_message_append_int32 (message, va_arg (var_args, dbus_int32_t)))
1005 case DBUS_TYPE_UINT32:
1006 if (!dbus_message_append_uint32 (message, va_arg (var_args, dbus_uint32_t)))
1009 case DBUS_TYPE_DOUBLE:
1010 if (!dbus_message_append_double (message, va_arg (var_args, double)))
1013 case DBUS_TYPE_STRING:
1014 if (!dbus_message_append_string (message, va_arg (var_args, const char *)))
1017 case DBUS_TYPE_BYTE_ARRAY:
1020 unsigned char *data;
1022 data = va_arg (var_args, unsigned char *);
1023 len = va_arg (var_args, int);
1025 if (!dbus_message_append_byte_array (message, data, len))
1029 case DBUS_TYPE_STRING_ARRAY:
1034 data = va_arg (var_args, const char **);
1035 len = va_arg (var_args, int);
1037 if (!dbus_message_append_string_array (message, data, len))
1043 _dbus_warn ("Unknown field type %d\n", type);
1046 type = va_arg (var_args, int);
1052 _dbus_string_set_length (&message->body, old_len);
1057 * Appends a 32 bit signed integer to the message.
1059 * @param message the message
1060 * @param value the integer value
1061 * @returns #TRUE on success
1064 dbus_message_append_int32 (DBusMessage *message,
1067 _dbus_assert (!message->locked);
1069 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_INT32))
1071 _dbus_string_shorten (&message->body, 1);
1075 return _dbus_marshal_int32 (&message->body,
1076 message->byte_order, value);
1080 * Appends a 32 bit unsigned integer to the message.
1082 * @param message the message
1083 * @param value the integer value
1084 * @returns #TRUE on success
1087 dbus_message_append_uint32 (DBusMessage *message,
1088 dbus_uint32_t value)
1090 _dbus_assert (!message->locked);
1092 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_UINT32))
1094 _dbus_string_shorten (&message->body, 1);
1098 return _dbus_marshal_uint32 (&message->body,
1099 message->byte_order, value);
1103 * Appends a double value to the message.
1105 * @param message the message
1106 * @param value the double value
1107 * @returns #TRUE on success
1110 dbus_message_append_double (DBusMessage *message,
1113 _dbus_assert (!message->locked);
1115 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_DOUBLE))
1117 _dbus_string_shorten (&message->body, 1);
1121 return _dbus_marshal_double (&message->body,
1122 message->byte_order, value);
1126 * Appends a UTF-8 string to the message.
1128 * @param message the message
1129 * @param value the string
1130 * @returns #TRUE on success
1133 dbus_message_append_string (DBusMessage *message,
1136 _dbus_assert (!message->locked);
1138 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING))
1140 _dbus_string_shorten (&message->body, 1);
1144 return _dbus_marshal_string (&message->body,
1145 message->byte_order, value);
1149 * Appends a byte array to the message.
1151 * @param message the message
1152 * @param value the array
1153 * @param len the length of the array
1154 * @returns #TRUE on success
1157 dbus_message_append_byte_array (DBusMessage *message,
1158 unsigned const char *value,
1161 _dbus_assert (!message->locked);
1163 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_BYTE_ARRAY))
1165 _dbus_string_shorten (&message->body, 1);
1169 return _dbus_marshal_byte_array (&message->body,
1170 message->byte_order, value, len);
1174 * Appends a string array to the message.
1176 * @param message the message
1177 * @param value the array
1178 * @param len the length of the array
1179 * @returns #TRUE on success
1182 dbus_message_append_string_array (DBusMessage *message,
1186 _dbus_assert (!message->locked);
1188 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING_ARRAY))
1190 _dbus_string_shorten (&message->body, 1);
1194 return _dbus_marshal_string_array (&message->body,
1195 message->byte_order, value, len);
1199 * Gets arguments from a message given a variable argument list.
1200 * The variable argument list should contain the type of the
1201 * argumen followed by a pointer to where the value should be
1202 * stored. The list is terminated with 0.
1204 * @param message the message
1205 * @param first_arg_type the first argument type
1206 * @param ... location for first argument value, then list of type-location pairs
1207 * @returns result code
1210 dbus_message_get_args (DBusMessage *message,
1214 DBusResultCode retval;
1217 va_start (var_args, first_arg_type);
1218 retval = dbus_message_get_args_valist (message, first_arg_type, var_args);
1225 * This function takes a va_list for use by language bindings
1227 * @todo this function (or some lower-level non-convenience function)
1228 * needs better error handling; should allow the application to
1229 * distinguish between out of memory, and bad data from the remote
1230 * app. It also needs to not leak a bunch of args when it gets
1231 * to the arg that's bad, as that would be a security hole
1232 * (allow one app to force another to leak memory)
1234 * @todo We need to free the argument data when an error occurs.
1236 * @see dbus_message_get_args
1237 * @param message the message
1238 * @param first_arg_type type of the first argument
1239 * @param var_args return location for first argument, followed by list of type/location pairs
1240 * @returns result code
1243 dbus_message_get_args_valist (DBusMessage *message,
1247 int spec_type, msg_type, i;
1248 DBusMessageIter *iter;
1250 iter = dbus_message_get_args_iter (message);
1253 return DBUS_RESULT_NO_MEMORY;
1255 spec_type = first_arg_type;
1258 while (spec_type != 0)
1260 msg_type = dbus_message_iter_get_arg_type (iter);
1262 if (msg_type != spec_type)
1264 _dbus_verbose ("Argument %d is specified to be of type \"%s\", but "
1265 "is actually of type \"%s\"\n", i,
1266 _dbus_type_to_string (spec_type),
1267 _dbus_type_to_string (msg_type));
1268 dbus_message_iter_unref (iter);
1270 return DBUS_RESULT_INVALID_ARGS;
1275 case DBUS_TYPE_INT32:
1279 ptr = va_arg (var_args, dbus_int32_t *);
1281 *ptr = dbus_message_iter_get_int32 (iter);
1284 case DBUS_TYPE_UINT32:
1288 ptr = va_arg (var_args, dbus_uint32_t *);
1290 *ptr = dbus_message_iter_get_uint32 (iter);
1294 case DBUS_TYPE_DOUBLE:
1298 ptr = va_arg (var_args, double *);
1300 *ptr = dbus_message_iter_get_double (iter);
1304 case DBUS_TYPE_STRING:
1308 ptr = va_arg (var_args, char **);
1310 *ptr = dbus_message_iter_get_string (iter);
1313 return DBUS_RESULT_NO_MEMORY;
1318 case DBUS_TYPE_BYTE_ARRAY:
1320 unsigned char **ptr;
1323 ptr = va_arg (var_args, unsigned char **);
1324 len = va_arg (var_args, int *);
1326 *ptr = dbus_message_iter_get_byte_array (iter, len);
1329 return DBUS_RESULT_NO_MEMORY;
1333 case DBUS_TYPE_STRING_ARRAY:
1338 ptr = va_arg (var_args, char ***);
1339 len = va_arg (var_args, int *);
1341 *ptr = dbus_message_iter_get_string_array (iter, len);
1344 return DBUS_RESULT_NO_MEMORY;
1349 _dbus_warn ("Unknown field type %d\n", spec_type);
1352 spec_type = va_arg (var_args, int);
1353 if (spec_type != 0 && !dbus_message_iter_next (iter))
1355 _dbus_verbose ("More fields than exist in the message were specified or field is corrupt\n");
1357 dbus_message_iter_unref (iter);
1358 return DBUS_RESULT_INVALID_ARGS;
1363 dbus_message_iter_unref (iter);
1364 return DBUS_RESULT_SUCCESS;
1368 * Returns a DBusMessageIter representing the arguments of the
1369 * message passed in.
1371 * @todo IMO the message iter should follow the GtkTextIter pattern,
1372 * a static object with a "stamp" value used to detect invalid
1373 * iter uses (uninitialized or after changing the message).
1374 * ref/unref is kind of annoying to deal with, and slower too.
1375 * This implies not ref'ing the message from the iter.
1377 * @param message the message
1378 * @returns a new iter.
1381 dbus_message_get_args_iter (DBusMessage *message)
1383 DBusMessageIter *iter;
1385 iter = dbus_new (DBusMessageIter, 1);
1387 dbus_message_ref (message);
1390 iter->message = message;
1397 * Increments the reference count of a DBusMessageIter.
1399 * @param iter the message iter
1400 * @see dbus_message_iter_unref
1403 dbus_message_iter_ref (DBusMessageIter *iter)
1405 _dbus_assert (iter->refcount > 0);
1407 iter->refcount += 1;
1411 * Decrements the reference count of a DBusMessageIter.
1413 * @param iter The message iter
1414 * @see dbus_message_iter_ref
1417 dbus_message_iter_unref (DBusMessageIter *iter)
1419 _dbus_assert (iter->refcount > 0);
1421 iter->refcount -= 1;
1423 if (iter->refcount == 0)
1425 dbus_message_unref (iter->message);
1432 * Checks if an iterator has any more fields.
1434 * @param iter the message iter
1435 * @returns #TRUE if there are more fields
1439 dbus_message_iter_has_next (DBusMessageIter *iter)
1443 if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
1444 iter->message->byte_order,
1445 iter->pos, &end_pos))
1448 if (end_pos >= _dbus_string_get_length (&iter->message->body))
1455 * Moves the iterator to the next field.
1457 * @param iter The message iter
1458 * @returns #TRUE if the iterator was moved to the next field
1461 dbus_message_iter_next (DBusMessageIter *iter)
1465 if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
1466 iter->message->byte_order,
1467 iter->pos, &end_pos))
1470 if (end_pos >= _dbus_string_get_length (&iter->message->body))
1473 iter->pos = end_pos;
1479 * Returns the argument type of the argument that the
1480 * message iterator points at.
1482 * @param iter the message iter
1483 * @returns the field type
1486 dbus_message_iter_get_arg_type (DBusMessageIter *iter)
1490 if (iter->pos >= _dbus_string_get_length (&iter->message->body))
1491 return DBUS_TYPE_INVALID;
1493 _dbus_string_get_const_data_len (&iter->message->body, &data, iter->pos, 1);
1495 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_STRING_ARRAY)
1498 return DBUS_TYPE_INVALID;
1502 * Returns the string value that an iterator may point to.
1503 * Note that you need to check that the iterator points to
1504 * a string value before using this function.
1506 * @see dbus_message_iter_get_field_type
1507 * @param iter the message iter
1508 * @returns the string
1511 dbus_message_iter_get_string (DBusMessageIter *iter)
1513 _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_STRING);
1515 return _dbus_demarshal_string (&iter->message->body, iter->message->byte_order,
1516 iter->pos + 1, NULL);
1520 * Returns the 32 bit signed integer value that an iterator may point to.
1521 * Note that you need to check that the iterator points to
1522 * a string value before using this function.
1524 * @see dbus_message_iter_get_field_type
1525 * @param iter the message iter
1526 * @returns the integer
1529 dbus_message_iter_get_int32 (DBusMessageIter *iter)
1531 return _dbus_demarshal_int32 (&iter->message->body, iter->message->byte_order,
1532 iter->pos + 1, NULL);
1536 * Returns the 32 bit unsigned integer value that an iterator may point to.
1537 * Note that you need to check that the iterator points to
1538 * a string value before using this function.
1540 * @see dbus_message_iter_get_field_type
1541 * @param iter the message iter
1542 * @returns the integer
1545 dbus_message_iter_get_uint32 (DBusMessageIter *iter)
1547 return _dbus_demarshal_uint32 (&iter->message->body, iter->message->byte_order,
1548 iter->pos + 1, NULL);
1552 * Returns the double value that an iterator may point to.
1553 * Note that you need to check that the iterator points to
1554 * a string value before using this function.
1556 * @see dbus_message_iter_get_field_type
1557 * @param iter the message iter
1558 * @returns the double
1561 dbus_message_iter_get_double (DBusMessageIter *iter)
1563 return _dbus_demarshal_double (&iter->message->body, iter->message->byte_order,
1564 iter->pos + 1, NULL);
1568 * Returns the byte array that the iterator may point to.
1569 * Note that you need to check that the iterator points
1570 * to a byte array prior to using this function.
1572 * @todo this function should probably take "unsigned char **" as
1573 * an out param argument, and return boolean or result code.
1575 * @param iter the iterator
1576 * @param len return location for length of byte array
1577 * @returns the byte array
1580 dbus_message_iter_get_byte_array (DBusMessageIter *iter,
1583 _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_BYTE_ARRAY);
1585 return _dbus_demarshal_byte_array (&iter->message->body, iter->message->byte_order,
1586 iter->pos + 1, NULL, len);
1590 * Returns the string array that the iterator may point to.
1591 * Note that you need to check that the iterator points
1592 * to a byte array prior to using this function.
1594 * @todo this function should probably take "char **" as
1595 * an out param argument, and return boolean or result code.
1597 * @param iter the iterator
1598 * @param len return location for length of byte array
1599 * @returns the byte array
1602 dbus_message_iter_get_string_array (DBusMessageIter *iter,
1605 _dbus_assert (dbus_message_iter_get_arg_type (iter) == DBUS_TYPE_STRING_ARRAY);
1607 return _dbus_demarshal_string_array (&iter->message->body, iter->message->byte_order,
1608 iter->pos + 1, NULL, len);
1612 * Sets the message sender.
1614 * @param message the message
1615 * @param sender the sender
1616 * @returns #FALSE if not enough memory
1619 dbus_message_set_sender (DBusMessage *message,
1622 _dbus_assert (!message->locked);
1626 delete_string_field (message, FIELD_SENDER);
1631 return set_string_field (message,
1638 * Sets a flag indicating that the message is an error reply
1639 * message, i.e. an "exception" rather than a normal response.
1641 * @param message the message
1642 * @param is_error_reply #TRUE if this is an error message.
1645 dbus_message_set_is_error (DBusMessage *message,
1646 dbus_bool_t is_error_reply)
1650 _dbus_assert (!message->locked);
1652 _dbus_string_get_data_len (&message->header, &header, 1, 1);
1655 *header |= DBUS_HEADER_FLAG_ERROR;
1657 *header &= ~DBUS_HEADER_FLAG_ERROR;
1661 * Returns #TRUE if the message is an error
1662 * reply to some previous message we sent.
1664 * @param message the message
1665 * @returns #TRUE if the message is an error
1668 dbus_message_get_is_error (DBusMessage *message)
1672 _dbus_string_get_const_data_len (&message->header, &header, 1, 1);
1674 return (*header & DBUS_HEADER_FLAG_ERROR) != 0;
1678 * Gets the service which originated this message,
1679 * or #NULL if unknown or inapplicable.
1681 * @param message the message
1682 * @returns the service name or #NULL
1685 dbus_message_get_sender (DBusMessage *message)
1687 return get_string_field (message, FIELD_SENDER, NULL);
1693 * @addtogroup DBusMessageInternals
1698 * @typedef DBusMessageLoader
1700 * The DBusMessageLoader object encapsulates the process of converting
1701 * a byte stream into a series of DBusMessage. It buffers the incoming
1702 * bytes as efficiently as possible, and generates a queue of
1703 * messages. DBusMessageLoader is typically used as part of a
1704 * DBusTransport implementation. The DBusTransport then hands off
1705 * the loaded messages to a DBusConnection, making the messages
1706 * visible to the application.
1710 /* we definitely use signed ints for sizes, so don't exceed
1711 * _DBUS_INT_MAX; and add 16 for paranoia, since a message
1712 * over 128M is pretty nuts anyhow.
1716 * The maximum sane message size.
1718 #define MAX_SANE_MESSAGE_SIZE (_DBUS_INT_MAX/16)
1721 * Implementation details of DBusMessageLoader.
1722 * All members are private.
1724 struct DBusMessageLoader
1726 int refcount; /**< Reference count. */
1728 DBusString data; /**< Buffered data */
1730 DBusList *messages; /**< Complete messages. */
1732 long max_message_size; /**< Maximum size of a message */
1734 unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
1736 unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
1740 * The initial buffer size of the message loader.
1742 * @todo this should be based on min header size plus some average
1743 * body size, or something. Or rather, the min header size only, if we
1744 * want to try to read only the header, store that in a DBusMessage,
1745 * then read only the body and store that, etc., depends on
1746 * how we optimize _dbus_message_loader_get_buffer() and what
1747 * the exact message format is.
1749 #define INITIAL_LOADER_DATA_LEN 32
1752 * Creates a new message loader. Returns #NULL if memory can't
1755 * @returns new loader, or #NULL.
1758 _dbus_message_loader_new (void)
1760 DBusMessageLoader *loader;
1762 loader = dbus_new0 (DBusMessageLoader, 1);
1766 loader->refcount = 1;
1768 /* Try to cap message size at something that won't *totally* hose
1769 * the system if we have a couple of them.
1771 loader->max_message_size = _DBUS_ONE_MEGABYTE * 32;
1773 if (!_dbus_string_init (&loader->data, _DBUS_INT_MAX))
1779 /* preallocate the buffer for speed, ignore failure */
1780 _dbus_string_set_length (&loader->data, INITIAL_LOADER_DATA_LEN);
1781 _dbus_string_set_length (&loader->data, 0);
1787 * Increments the reference count of the loader.
1789 * @param loader the loader.
1792 _dbus_message_loader_ref (DBusMessageLoader *loader)
1794 loader->refcount += 1;
1798 * Decrements the reference count of the loader and finalizes the
1799 * loader when the count reaches zero.
1801 * @param loader the loader.
1804 _dbus_message_loader_unref (DBusMessageLoader *loader)
1806 loader->refcount -= 1;
1807 if (loader->refcount == 0)
1809 _dbus_list_foreach (&loader->messages,
1810 (DBusForeachFunction) dbus_message_unref,
1812 _dbus_list_clear (&loader->messages);
1813 _dbus_string_free (&loader->data);
1819 * Gets the buffer to use for reading data from the network. Network
1820 * data is read directly into an allocated buffer, which is then used
1821 * in the DBusMessage, to avoid as many extra memcpy's as possible.
1822 * The buffer must always be returned immediately using
1823 * _dbus_message_loader_return_buffer(), even if no bytes are
1824 * successfully read.
1826 * @todo this function can be a lot more clever. For example
1827 * it can probably always return a buffer size to read exactly
1828 * the body of the next message, thus avoiding any memory wastage
1831 * @param loader the message loader.
1832 * @param buffer the buffer
1835 _dbus_message_loader_get_buffer (DBusMessageLoader *loader,
1836 DBusString **buffer)
1838 _dbus_assert (!loader->buffer_outstanding);
1840 *buffer = &loader->data;
1842 loader->buffer_outstanding = TRUE;
1846 * The smallest header size that can occur.
1847 * (It won't be valid)
1849 #define DBUS_MINIMUM_HEADER_SIZE 16
1851 /** Pack four characters as in "abcd" into a uint32 */
1852 #define FOUR_CHARS_TO_UINT32(a, b, c, d) \
1853 ((((dbus_uint32_t)a) << 24) | \
1854 (((dbus_uint32_t)b) << 16) | \
1855 (((dbus_uint32_t)c) << 8) | \
1858 /** DBUS_HEADER_FIELD_NAME packed into a dbus_uint32_t */
1859 #define DBUS_HEADER_FIELD_NAME_AS_UINT32 \
1860 FOUR_CHARS_TO_UINT32 ('n', 'a', 'm', 'e')
1862 /** DBUS_HEADER_FIELD_SERVICE packed into a dbus_uint32_t */
1863 #define DBUS_HEADER_FIELD_SERVICE_AS_UINT32 \
1864 FOUR_CHARS_TO_UINT32 ('s', 'r', 'v', 'c')
1866 /** DBUS_HEADER_FIELD_REPLY packed into a dbus_uint32_t */
1867 #define DBUS_HEADER_FIELD_REPLY_AS_UINT32 \
1868 FOUR_CHARS_TO_UINT32 ('r', 'p', 'l', 'y')
1870 /** DBUS_HEADER_FIELD_SENDER Packed into a dbus_uint32_t */
1871 #define DBUS_HEADER_FIELD_SENDER_AS_UINT32 \
1872 FOUR_CHARS_TO_UINT32 ('s', 'n', 'd', 'r')
1875 decode_header_data (const DBusString *data,
1878 HeaderField fields[FIELD_LAST])
1884 if (header_len < 16)
1888 while (i < FIELD_LAST)
1890 fields[i].offset = -1;
1894 fields[FIELD_HEADER_LENGTH].offset = 4;
1895 fields[FIELD_BODY_LENGTH].offset = 8;
1896 fields[FIELD_CLIENT_SERIAL].offset = 12;
1898 /* Now handle the named fields. A real named field is at least 4
1899 * bytes for the name, plus a type code (1 byte) plus padding. So
1900 * if we have less than 8 bytes left, it must be alignment padding,
1901 * not a field. While >= 8 bytes can't be entirely alignment
1905 while ((pos + 7) < header_len)
1907 pos = _DBUS_ALIGN_VALUE (pos, 4);
1909 if ((pos + 4) > header_len)
1912 _dbus_string_get_const_data_len (data, &field, pos, 4);
1915 _dbus_assert (_DBUS_ALIGN_ADDRESS (field, 4) == field);
1917 /* I believe FROM_BE is right, but if not we'll find out
1920 switch (DBUS_UINT32_FROM_BE (*(int*)field))
1922 case DBUS_HEADER_FIELD_SERVICE_AS_UINT32:
1923 if (fields[FIELD_SERVICE].offset >= 0)
1925 _dbus_verbose ("%s field provided twice\n",
1926 DBUS_HEADER_FIELD_SERVICE);
1930 fields[FIELD_SERVICE].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1931 _dbus_verbose ("Found service name at offset %d\n",
1932 fields[FIELD_SERVICE].offset);
1935 case DBUS_HEADER_FIELD_NAME_AS_UINT32:
1936 if (fields[FIELD_NAME].offset >= 0)
1938 _dbus_verbose ("%s field provided twice\n",
1939 DBUS_HEADER_FIELD_NAME);
1943 fields[FIELD_NAME].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1945 _dbus_verbose ("Found message name at offset %d\n",
1946 fields[FIELD_NAME].offset);
1948 case DBUS_HEADER_FIELD_SENDER_AS_UINT32:
1949 if (fields[FIELD_SENDER].offset >= 0)
1951 _dbus_verbose ("%s field provided twice\n",
1952 DBUS_HEADER_FIELD_SENDER);
1956 fields[FIELD_SENDER].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1958 _dbus_verbose ("Found sender name at offset %d\n",
1959 fields[FIELD_NAME].offset);
1962 case DBUS_HEADER_FIELD_REPLY_AS_UINT32:
1963 if (fields[FIELD_REPLY_SERIAL].offset >= 0)
1965 _dbus_verbose ("%s field provided twice\n",
1966 DBUS_HEADER_FIELD_REPLY);
1970 fields[FIELD_REPLY_SERIAL].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1972 _dbus_verbose ("Found reply serial at offset %d\n",
1973 fields[FIELD_REPLY_SERIAL].offset);
1977 _dbus_verbose ("Ignoring an unknown header field: %c%c%c%c\n",
1978 field[0], field[1], field[2], field[3]);
1981 if (!_dbus_marshal_validate_arg (data, byte_order, pos, &new_pos))
1984 if (new_pos > header_len)
1990 if (pos < header_len)
1992 /* Alignment padding, verify that it's nul */
1993 _dbus_assert ((header_len - pos) < 8);
1995 if (!_dbus_string_validate_nul (data,
1996 pos, (header_len - pos)))
1998 _dbus_verbose ("header alignment padding is not nul\n");
2007 * Returns a buffer obtained from _dbus_message_loader_get_buffer(),
2008 * indicating to the loader how many bytes of the buffer were filled
2009 * in. This function must always be called, even if no bytes were
2010 * successfully read.
2012 * @todo if we run out of memory in here, we offer no way for calling
2013 * code to handle it, i.e. they can't re-run the message parsing
2014 * attempt. Perhaps much of this code could be moved to pop_message()?
2015 * But then that may need to distinguish NULL return for no messages
2016 * from NULL return for errors.
2018 * @param loader the loader.
2019 * @param buffer the buffer.
2020 * @param bytes_read number of bytes that were read into the buffer.
2023 _dbus_message_loader_return_buffer (DBusMessageLoader *loader,
2027 _dbus_assert (loader->buffer_outstanding);
2028 _dbus_assert (buffer == &loader->data);
2030 loader->buffer_outstanding = FALSE;
2032 if (loader->corrupted)
2035 while (_dbus_string_get_length (&loader->data) >= 16)
2037 DBusMessage *message;
2038 const char *header_data;
2039 int byte_order, header_len, body_len;
2040 dbus_uint32_t header_len_unsigned, body_len_unsigned;
2042 _dbus_string_get_const_data_len (&loader->data, &header_data, 0, 16);
2044 _dbus_assert (_DBUS_ALIGN_ADDRESS (header_data, 4) == header_data);
2046 if (header_data[2] != DBUS_MAJOR_PROTOCOL_VERSION)
2048 _dbus_verbose ("Message has protocol version %d ours is %d\n",
2049 (int) header_data[2], DBUS_MAJOR_PROTOCOL_VERSION);
2050 loader->corrupted = TRUE;
2054 byte_order = header_data[0];
2056 if (byte_order != DBUS_LITTLE_ENDIAN &&
2057 byte_order != DBUS_BIG_ENDIAN)
2059 _dbus_verbose ("Message with bad byte order '%c' received\n",
2061 loader->corrupted = TRUE;
2065 header_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 4);
2066 body_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 8);
2068 if (header_len_unsigned < 16)
2070 _dbus_verbose ("Message had broken too-small header length %u\n",
2071 header_len_unsigned);
2072 loader->corrupted = TRUE;
2076 if (header_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE ||
2077 body_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE)
2079 _dbus_verbose ("Header or body length too large (%u %u)\n",
2080 header_len_unsigned,
2082 loader->corrupted = TRUE;
2086 /* Now that we know the values are in signed range, get
2087 * rid of stupid unsigned, just causes bugs
2089 header_len = header_len_unsigned;
2090 body_len = body_len_unsigned;
2092 if (_DBUS_ALIGN_VALUE (header_len, 8) != header_len_unsigned)
2094 _dbus_verbose ("header length %d is not aligned to 8 bytes\n",
2096 loader->corrupted = TRUE;
2100 if (header_len + body_len > loader->max_message_size)
2102 _dbus_verbose ("Message claimed length header = %d body = %d exceeds max message length %d\n",
2103 header_len, body_len, loader->max_message_size);
2104 loader->corrupted = TRUE;
2108 if (_dbus_string_get_length (&loader->data) >= (header_len + body_len))
2110 HeaderField fields[FIELD_LAST];
2114 if (!decode_header_data (&loader->data, header_len, byte_order,
2117 loader->corrupted = TRUE;
2121 next_arg = header_len;
2122 while (next_arg < (header_len + body_len))
2124 int prev = next_arg;
2126 if (!_dbus_marshal_validate_arg (&loader->data,
2131 loader->corrupted = TRUE;
2135 _dbus_assert (next_arg > prev);
2138 if (next_arg > (header_len + body_len))
2140 _dbus_verbose ("end of last arg at %d but message has len %d+%d=%d\n",
2141 next_arg, header_len, body_len,
2142 header_len + body_len);
2143 loader->corrupted = TRUE;
2147 message = dbus_message_new_empty_header ();
2148 if (message == NULL)
2149 break; /* ugh, postpone this I guess. */
2151 message->byte_order = byte_order;
2153 /* Copy in the offsets we found */
2155 while (i < FIELD_LAST)
2157 message->header_fields[i] = fields[i];
2161 if (!_dbus_list_append (&loader->messages, message))
2163 dbus_message_unref (message);
2167 _dbus_assert (_dbus_string_get_length (&message->header) == 0);
2168 _dbus_assert (_dbus_string_get_length (&message->body) == 0);
2170 _dbus_assert (_dbus_string_get_length (&loader->data) >=
2171 (header_len + body_len));
2173 if (!_dbus_string_move_len (&loader->data, 0, header_len, &message->header, 0))
2175 _dbus_list_remove_last (&loader->messages, message);
2176 dbus_message_unref (message);
2180 if (!_dbus_string_move_len (&loader->data, 0, body_len, &message->body, 0))
2184 /* put the header back, we'll try again later */
2185 result = _dbus_string_copy_len (&message->header, 0, header_len,
2187 _dbus_assert (result); /* because DBusString never reallocs smaller */
2189 _dbus_list_remove_last (&loader->messages, message);
2190 dbus_message_unref (message);
2194 _dbus_assert (_dbus_string_get_length (&message->header) == header_len);
2195 _dbus_assert (_dbus_string_get_length (&message->body) == body_len);
2197 _dbus_verbose ("Loaded message %p\n", message);
2205 * Pops a loaded message (passing ownership of the message
2206 * to the caller). Returns #NULL if no messages have been
2209 * @param loader the loader.
2210 * @returns the next message, or #NULL if none.
2213 _dbus_message_loader_pop_message (DBusMessageLoader *loader)
2215 return _dbus_list_pop_first (&loader->messages);
2220 * Checks whether the loader is confused due to bad data.
2221 * If messages are received that are invalid, the
2222 * loader gets confused and gives up permanently.
2223 * This state is called "corrupted."
2225 * @param loader the loader
2226 * @returns #TRUE if the loader is hosed.
2229 _dbus_message_loader_get_is_corrupted (DBusMessageLoader *loader)
2231 return loader->corrupted;
2235 * Sets the maximum size message we allow.
2237 * @param loader the loader
2238 * @param size the max message size in bytes
2241 _dbus_message_loader_set_max_message_size (DBusMessageLoader *loader,
2244 if (size > MAX_SANE_MESSAGE_SIZE)
2246 _dbus_verbose ("clamping requested max message size %ld to %d\n",
2247 size, MAX_SANE_MESSAGE_SIZE);
2248 size = MAX_SANE_MESSAGE_SIZE;
2250 loader->max_message_size = size;
2254 * Gets the maximum allowed message size in bytes.
2256 * @param loader the loader
2257 * @returns max size in bytes
2260 _dbus_message_loader_get_max_message_size (DBusMessageLoader *loader)
2262 return loader->max_message_size;
2266 #ifdef DBUS_BUILD_TESTS
2267 #include "dbus-test.h"
2271 message_iter_test (DBusMessage *message)
2273 DBusMessageIter *iter;
2276 iter = dbus_message_get_args_iter (message);
2279 if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_STRING)
2280 _dbus_assert_not_reached ("Argument type isn't string");
2282 str = dbus_message_iter_get_string (iter);
2283 if (strcmp (str, "Test string") != 0)
2284 _dbus_assert_not_reached ("Strings differ");
2287 if (!dbus_message_iter_next (iter))
2288 _dbus_assert_not_reached ("Reached end of arguments");
2290 /* Signed integer tests */
2291 if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_INT32)
2292 _dbus_assert_not_reached ("Argument type isn't int32");
2294 if (dbus_message_iter_get_int32 (iter) != -0x12345678)
2295 _dbus_assert_not_reached ("Signed integers differ");
2297 if (!dbus_message_iter_next (iter))
2298 _dbus_assert_not_reached ("Reached end of fields");
2300 /* Unsigned integer tests */
2301 if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_UINT32)
2302 _dbus_assert_not_reached ("Argument type isn't int32");
2304 if (dbus_message_iter_get_int32 (iter) != 0xedd1e)
2305 _dbus_assert_not_reached ("Unsigned integers differ");
2307 if (!dbus_message_iter_next (iter))
2308 _dbus_assert_not_reached ("Reached end of arguments");
2311 if (dbus_message_iter_get_arg_type (iter) != DBUS_TYPE_DOUBLE)
2312 _dbus_assert_not_reached ("Argument type isn't double");
2314 if (dbus_message_iter_get_double (iter) != 3.14159)
2315 _dbus_assert_not_reached ("Doubles differ");
2317 if (dbus_message_iter_next (iter))
2318 _dbus_assert_not_reached ("Didn't reach end of arguments");
2320 dbus_message_iter_unref (iter);
2324 check_message_handling (DBusMessage *message)
2326 DBusMessageIter *iter;
2329 dbus_int32_t client_serial;
2334 client_serial = _dbus_message_get_client_serial (message);
2336 /* can't use set_client_serial due to the assertions at the start of it */
2337 set_int_field (message, FIELD_CLIENT_SERIAL,
2340 if (client_serial != _dbus_message_get_client_serial (message))
2342 _dbus_warn ("get/set cycle for client_serial did not succeed\n");
2346 /* If we implement message_set_arg (message, n, value)
2347 * then we would want to test it here
2350 iter = dbus_message_get_args_iter (message);
2351 while ((type = dbus_message_iter_get_arg_type (iter)) != DBUS_TYPE_INVALID)
2355 case DBUS_TYPE_STRING:
2358 str = dbus_message_iter_get_string (iter);
2364 if (!dbus_message_iter_next (iter))
2372 dbus_message_iter_unref (iter);
2378 check_have_valid_message (DBusMessageLoader *loader)
2380 DBusMessage *message;
2386 if (_dbus_message_loader_get_is_corrupted (loader))
2388 _dbus_warn ("loader corrupted on message that was expected to be valid\n");
2392 message = _dbus_message_loader_pop_message (loader);
2393 if (message == NULL)
2395 _dbus_warn ("didn't load message that was expected to be valid (message not popped)\n");
2399 if (_dbus_string_get_length (&loader->data) > 0)
2401 _dbus_warn ("had leftover bytes from expected-to-be-valid single message\n");
2405 /* Verify that we're able to properly deal with the message.
2406 * For example, this would detect improper handling of messages
2407 * in nonstandard byte order.
2409 if (!check_message_handling (message))
2416 dbus_message_unref (message);
2421 check_invalid_message (DBusMessageLoader *loader)
2427 if (!_dbus_message_loader_get_is_corrupted (loader))
2429 _dbus_warn ("loader not corrupted on message that was expected to be invalid\n");
2440 check_incomplete_message (DBusMessageLoader *loader)
2442 DBusMessage *message;
2448 if (_dbus_message_loader_get_is_corrupted (loader))
2450 _dbus_warn ("loader corrupted on message that was expected to be valid (but incomplete)\n");
2454 message = _dbus_message_loader_pop_message (loader);
2455 if (message != NULL)
2457 _dbus_warn ("loaded message that was expected to be incomplete\n");
2465 dbus_message_unref (message);
2470 check_loader_results (DBusMessageLoader *loader,
2471 DBusMessageValidity validity)
2475 case _DBUS_MESSAGE_VALID:
2476 return check_have_valid_message (loader);
2477 case _DBUS_MESSAGE_INVALID:
2478 return check_invalid_message (loader);
2479 case _DBUS_MESSAGE_INCOMPLETE:
2480 return check_incomplete_message (loader);
2481 case _DBUS_MESSAGE_UNKNOWN:
2485 _dbus_assert_not_reached ("bad DBusMessageValidity");
2491 * Loads the message in the given message file.
2493 * @param filename filename to load
2494 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
2495 * @param data string to load message into
2496 * @returns #TRUE if the message was loaded
2499 dbus_internal_do_not_use_load_message_file (const DBusString *filename,
2509 DBusResultCode result;
2511 result = _dbus_file_get_contents (data, filename);
2512 if (result != DBUS_RESULT_SUCCESS)
2515 _dbus_string_get_const_data (filename, &s);
2516 _dbus_warn ("Could not load message file %s\n", s);
2522 if (!_dbus_message_data_load (data, filename))
2525 _dbus_string_get_const_data (filename, &s);
2526 _dbus_warn ("Could not load message file %s\n", s);
2539 * Tries loading the message in the given message file
2540 * and verifies that DBusMessageLoader can handle it.
2542 * @param filename filename to load
2543 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
2544 * @param expected_validity what the message has to be like to return #TRUE
2545 * @returns #TRUE if the message has the expected validity
2548 dbus_internal_do_not_use_try_message_file (const DBusString *filename,
2550 DBusMessageValidity expected_validity)
2557 if (!_dbus_string_init (&data, _DBUS_INT_MAX))
2558 _dbus_assert_not_reached ("could not allocate string\n");
2560 if (!dbus_internal_do_not_use_load_message_file (filename, is_raw,
2564 retval = dbus_internal_do_not_use_try_message_data (&data, expected_validity);
2572 if (_dbus_string_get_length (&data) > 0)
2573 _dbus_verbose_bytes_of_string (&data, 0,
2574 _dbus_string_get_length (&data));
2576 _dbus_string_get_const_data (filename, &s);
2577 _dbus_warn ("Failed message loader test on %s\n",
2581 _dbus_string_free (&data);
2587 * Tries loading the given message data.
2590 * @param data the message data
2591 * @param expected_validity what the message has to be like to return #TRUE
2592 * @returns #TRUE if the message has the expected validity
2595 dbus_internal_do_not_use_try_message_data (const DBusString *data,
2596 DBusMessageValidity expected_validity)
2598 DBusMessageLoader *loader;
2606 /* Write the data one byte at a time */
2608 loader = _dbus_message_loader_new ();
2610 len = _dbus_string_get_length (data);
2611 for (i = 0; i < len; i++)
2615 _dbus_message_loader_get_buffer (loader, &buffer);
2616 _dbus_string_append_byte (buffer,
2617 _dbus_string_get_byte (data, i));
2618 _dbus_message_loader_return_buffer (loader, buffer, 1);
2621 if (!check_loader_results (loader, expected_validity))
2624 _dbus_message_loader_unref (loader);
2627 /* Write the data all at once */
2629 loader = _dbus_message_loader_new ();
2634 _dbus_message_loader_get_buffer (loader, &buffer);
2635 _dbus_string_copy (data, 0, buffer,
2636 _dbus_string_get_length (buffer));
2637 _dbus_message_loader_return_buffer (loader, buffer, 1);
2640 if (!check_loader_results (loader, expected_validity))
2643 _dbus_message_loader_unref (loader);
2646 /* Write the data 2 bytes at a time */
2648 loader = _dbus_message_loader_new ();
2650 len = _dbus_string_get_length (data);
2651 for (i = 0; i < len; i += 2)
2655 _dbus_message_loader_get_buffer (loader, &buffer);
2656 _dbus_string_append_byte (buffer,
2657 _dbus_string_get_byte (data, i));
2659 _dbus_string_append_byte (buffer,
2660 _dbus_string_get_byte (data, i+1));
2661 _dbus_message_loader_return_buffer (loader, buffer, 1);
2664 if (!check_loader_results (loader, expected_validity))
2667 _dbus_message_loader_unref (loader);
2675 _dbus_message_loader_unref (loader);
2681 process_test_subdir (const DBusString *test_base_dir,
2683 DBusMessageValidity validity,
2684 DBusForeachMessageFileFunc function,
2687 DBusString test_directory;
2688 DBusString filename;
2691 DBusResultCode result;
2696 if (!_dbus_string_init (&test_directory, _DBUS_INT_MAX))
2697 _dbus_assert_not_reached ("didn't allocate test_directory\n");
2699 _dbus_string_init_const (&filename, subdir);
2701 if (!_dbus_string_copy (test_base_dir, 0,
2702 &test_directory, 0))
2703 _dbus_assert_not_reached ("couldn't copy test_base_dir to test_directory");
2705 if (!_dbus_concat_dir_and_file (&test_directory, &filename))
2706 _dbus_assert_not_reached ("couldn't allocate full path");
2708 _dbus_string_free (&filename);
2709 if (!_dbus_string_init (&filename, _DBUS_INT_MAX))
2710 _dbus_assert_not_reached ("didn't allocate filename string\n");
2712 dir = _dbus_directory_open (&test_directory, &result);
2716 _dbus_string_get_const_data (&test_directory, &s);
2717 _dbus_warn ("Could not open %s: %s\n", s,
2718 dbus_result_to_string (result));
2722 printf ("Testing:\n");
2724 result = DBUS_RESULT_SUCCESS;
2726 while (_dbus_directory_get_next_file (dir, &filename, &result))
2728 DBusString full_path;
2731 if (!_dbus_string_init (&full_path, _DBUS_INT_MAX))
2732 _dbus_assert_not_reached ("couldn't init string");
2734 if (!_dbus_string_copy (&test_directory, 0, &full_path, 0))
2735 _dbus_assert_not_reached ("couldn't copy dir to full_path");
2737 if (!_dbus_concat_dir_and_file (&full_path, &filename))
2738 _dbus_assert_not_reached ("couldn't concat file to dir");
2740 if (_dbus_string_ends_with_c_str (&filename, ".message"))
2742 else if (_dbus_string_ends_with_c_str (&filename, ".message-raw"))
2746 const char *filename_c;
2747 _dbus_string_get_const_data (&filename, &filename_c);
2748 _dbus_verbose ("Skipping non-.message file %s\n",
2750 _dbus_string_free (&full_path);
2756 _dbus_string_get_const_data (&filename, &s);
2757 printf (" %s\n", s);
2760 _dbus_verbose (" expecting %s\n",
2761 validity == _DBUS_MESSAGE_VALID ? "valid" :
2762 (validity == _DBUS_MESSAGE_INVALID ? "invalid" :
2763 (validity == _DBUS_MESSAGE_INCOMPLETE ? "incomplete" : "unknown")));
2765 if (! (*function) (&full_path, is_raw, validity, user_data))
2767 _dbus_string_free (&full_path);
2771 _dbus_string_free (&full_path);
2774 if (result != DBUS_RESULT_SUCCESS)
2777 _dbus_string_get_const_data (&test_directory, &s);
2778 _dbus_warn ("Could not get next file in %s: %s\n",
2779 s, dbus_result_to_string (result));
2788 _dbus_directory_close (dir);
2789 _dbus_string_free (&test_directory);
2790 _dbus_string_free (&filename);
2796 * Runs the given function on every message file in the test suite.
2797 * The function should return #FALSE on test failure or fatal error.
2799 * @param test_data_dir root dir of the test suite data files (top_srcdir/test/data)
2800 * @param func the function to run
2801 * @param user_data data for function
2802 * @returns #FALSE if there's a failure
2805 dbus_internal_do_not_use_foreach_message_file (const char *test_data_dir,
2806 DBusForeachMessageFileFunc func,
2809 DBusString test_directory;
2814 _dbus_string_init_const (&test_directory, test_data_dir);
2816 if (!process_test_subdir (&test_directory, "valid-messages",
2817 _DBUS_MESSAGE_VALID, func, user_data))
2820 if (!process_test_subdir (&test_directory, "invalid-messages",
2821 _DBUS_MESSAGE_INVALID, func, user_data))
2824 if (!process_test_subdir (&test_directory, "incomplete-messages",
2825 _DBUS_MESSAGE_INCOMPLETE, func, user_data))
2832 _dbus_string_free (&test_directory);
2838 * @ingroup DBusMessageInternals
2839 * Unit test for DBusMessage.
2841 * @returns #TRUE on success.
2844 _dbus_message_test (const char *test_data_dir)
2846 DBusMessage *message;
2847 DBusMessageLoader *loader;
2850 dbus_int32_t our_int;
2854 /* Test the vararg functions */
2855 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
2856 _dbus_message_set_client_serial (message, 1);
2857 dbus_message_append_args (message,
2858 DBUS_TYPE_INT32, -0x12345678,
2859 DBUS_TYPE_STRING, "Test string",
2860 DBUS_TYPE_DOUBLE, 3.14159,
2862 _dbus_verbose_bytes_of_string (&message->header, 0,
2863 _dbus_string_get_length (&message->header));
2864 _dbus_verbose_bytes_of_string (&message->body, 0,
2865 _dbus_string_get_length (&message->body));
2867 if (dbus_message_get_args (message,
2868 DBUS_TYPE_INT32, &our_int,
2869 DBUS_TYPE_STRING, &our_str,
2870 DBUS_TYPE_DOUBLE, &our_double,
2871 0) != DBUS_RESULT_SUCCESS)
2872 _dbus_assert_not_reached ("Could not get arguments");
2874 if (our_int != -0x12345678)
2875 _dbus_assert_not_reached ("integers differ!");
2877 if (our_double != 3.14159)
2878 _dbus_assert_not_reached ("doubles differ!");
2880 if (strcmp (our_str, "Test string") != 0)
2881 _dbus_assert_not_reached ("strings differ!");
2883 dbus_free (our_str);
2884 dbus_message_unref (message);
2886 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
2887 _dbus_message_set_client_serial (message, 1);
2888 _dbus_message_set_reply_serial (message, 0x12345678);
2890 dbus_message_append_string (message, "Test string");
2891 dbus_message_append_int32 (message, -0x12345678);
2892 dbus_message_append_uint32 (message, 0xedd1e);
2893 dbus_message_append_double (message, 3.14159);
2895 message_iter_test (message);
2897 /* Message loader test */
2898 _dbus_message_lock (message);
2899 loader = _dbus_message_loader_new ();
2901 /* Write the header data one byte at a time */
2902 _dbus_string_get_const_data (&message->header, &data);
2903 for (i = 0; i < _dbus_string_get_length (&message->header); i++)
2907 _dbus_message_loader_get_buffer (loader, &buffer);
2908 _dbus_string_append_byte (buffer, data[i]);
2909 _dbus_message_loader_return_buffer (loader, buffer, 1);
2912 /* Write the body data one byte at a time */
2913 _dbus_string_get_const_data (&message->body, &data);
2914 for (i = 0; i < _dbus_string_get_length (&message->body); i++)
2918 _dbus_message_loader_get_buffer (loader, &buffer);
2919 _dbus_string_append_byte (buffer, data[i]);
2920 _dbus_message_loader_return_buffer (loader, buffer, 1);
2923 dbus_message_unref (message);
2925 /* Now pop back the message */
2926 if (_dbus_message_loader_get_is_corrupted (loader))
2927 _dbus_assert_not_reached ("message loader corrupted");
2929 message = _dbus_message_loader_pop_message (loader);
2931 _dbus_assert_not_reached ("received a NULL message");
2933 if (_dbus_message_get_reply_serial (message) != 0x12345678)
2934 _dbus_assert_not_reached ("reply serial fields differ");
2936 message_iter_test (message);
2938 dbus_message_unref (message);
2939 _dbus_message_loader_unref (loader);
2941 /* Now load every message in test_data_dir if we have one */
2942 if (test_data_dir == NULL)
2945 return dbus_internal_do_not_use_foreach_message_file (test_data_dir,
2946 (DBusForeachMessageFileFunc)
2947 dbus_internal_do_not_use_try_message_file,
2951 #endif /* DBUS_BUILD_TESTS */