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
750 * can't be allocated for the message.
752 * @todo use DBusString internally to store service and name.
754 * @param service service that the message should be sent to
755 * @param name name of the message
756 * @returns a new DBusMessage, free with dbus_message_unref()
757 * @see dbus_message_unref()
760 dbus_message_new (const char *service,
763 DBusMessage *message;
765 message = dbus_message_new_empty_header ();
769 if (!dbus_message_create_header (message, service, name))
771 dbus_message_unref (message);
779 * Constructs a message that is a reply to some other
780 * message. Returns #NULL if memory can't be allocated
783 * @param name the name of the message
784 * @param original_message the message which the created
785 * message is a reply to.
786 * @returns a new DBusMessage, free with dbus_message_unref()
787 * @see dbus_message_new(), dbus_message_unref()
790 dbus_message_new_reply (const char *name,
791 DBusMessage *original_message)
793 DBusMessage *message;
796 sender = get_string_field (original_message,
799 _dbus_assert (sender != NULL);
801 message = dbus_message_new (sender, name);
806 if (!_dbus_message_set_reply_serial (message,
807 _dbus_message_get_client_serial (original_message)))
809 dbus_message_unref (message);
817 * Creates a new message that is an exact replica of the message
818 * specified, except that its refcount is set to 1.
820 * @param message the message.
821 * @returns the new message.
824 dbus_message_new_from_message (const DBusMessage *message)
829 retval = dbus_new0 (DBusMessage, 1);
833 retval->refcount = 1;
834 retval->byte_order = message->byte_order;
836 if (!_dbus_string_init (&retval->header, _DBUS_INT_MAX))
842 if (!_dbus_string_init (&retval->body, _DBUS_INT_MAX))
844 _dbus_string_free (&retval->header);
849 if (!_dbus_string_copy (&message->header, 0,
852 _dbus_string_free (&retval->header);
853 _dbus_string_free (&retval->body);
859 if (!_dbus_string_copy (&message->body, 0,
862 _dbus_string_free (&retval->header);
863 _dbus_string_free (&retval->body);
869 for (i = 0; i < FIELD_LAST; i++)
871 retval->header_fields[i].offset = message->header_fields[i].offset;
879 * Increments the reference count of a DBusMessage.
881 * @param message The message
882 * @see dbus_message_unref
885 dbus_message_ref (DBusMessage *message)
887 _dbus_assert (message->refcount > 0);
889 message->refcount += 1;
893 * Decrements the reference count of a DBusMessage.
895 * @param message The message
896 * @see dbus_message_ref
899 dbus_message_unref (DBusMessage *message)
901 _dbus_assert (message->refcount > 0);
903 message->refcount -= 1;
904 if (message->refcount == 0)
906 if (message->size_counter != NULL)
908 _dbus_counter_adjust (message->size_counter,
909 - message->size_counter_delta);
910 _dbus_counter_unref (message->size_counter);
913 _dbus_string_free (&message->header);
914 _dbus_string_free (&message->body);
921 * Gets the name of a message.
923 * @param message the message
924 * @returns the message name (should not be freed)
927 dbus_message_get_name (DBusMessage *message)
929 return get_string_field (message, FIELD_NAME, NULL);
933 * Gets the destination service of a message.
935 * @param message the message
936 * @returns the message destination service (should not be freed)
939 dbus_message_get_service (DBusMessage *message)
941 return get_string_field (message, FIELD_SERVICE, NULL);
945 * Appends fields to a message given a variable argument
946 * list. The variable argument list should contain the type
947 * of the field followed by the value to add.
948 * The list is terminated with 0.
950 * @param message the message
951 * @param first_field_type type of the first field
952 * @param ... value of first field, list of additional type-value pairs
953 * @returns #TRUE on success
956 dbus_message_append_fields (DBusMessage *message,
957 int first_field_type,
963 va_start (var_args, first_field_type);
964 retval = dbus_message_append_fields_valist (message,
973 * This function takes a va_list for use by language bindings
975 * @see dbus_message_append_fields.
976 * @param message the message
977 * @param first_field_type type of first field
978 * @param var_args value of first field, then list of type/value pairs
979 * @returns #TRUE on success
982 dbus_message_append_fields_valist (DBusMessage *message,
983 int first_field_type,
988 old_len = _dbus_string_get_length (&message->body);
990 type = first_field_type;
996 case DBUS_TYPE_INT32:
997 if (!dbus_message_append_int32 (message, va_arg (var_args, dbus_int32_t)))
1000 case DBUS_TYPE_UINT32:
1001 if (!dbus_message_append_uint32 (message, va_arg (var_args, dbus_uint32_t)))
1004 case DBUS_TYPE_DOUBLE:
1005 if (!dbus_message_append_double (message, va_arg (var_args, double)))
1008 case DBUS_TYPE_STRING:
1009 if (!dbus_message_append_string (message, va_arg (var_args, const char *)))
1012 case DBUS_TYPE_BYTE_ARRAY:
1015 unsigned char *data;
1017 data = va_arg (var_args, unsigned char *);
1018 len = va_arg (var_args, int);
1020 if (!dbus_message_append_byte_array (message, data, len))
1024 case DBUS_TYPE_STRING_ARRAY:
1029 data = va_arg (var_args, const char **);
1030 len = va_arg (var_args, int);
1032 if (!dbus_message_append_string_array (message, data, len))
1038 _dbus_warn ("Unknown field type %d\n", type);
1041 type = va_arg (var_args, int);
1047 _dbus_string_set_length (&message->body, old_len);
1052 * Appends a 32 bit signed integer to the message.
1054 * @param message the message
1055 * @param value the integer value
1056 * @returns #TRUE on success
1059 dbus_message_append_int32 (DBusMessage *message,
1062 _dbus_assert (!message->locked);
1064 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_INT32))
1066 _dbus_string_shorten (&message->body, 1);
1070 return _dbus_marshal_int32 (&message->body,
1071 message->byte_order, value);
1075 * Appends a 32 bit unsigned integer to the message.
1077 * @param message the message
1078 * @param value the integer value
1079 * @returns #TRUE on success
1082 dbus_message_append_uint32 (DBusMessage *message,
1083 dbus_uint32_t value)
1085 _dbus_assert (!message->locked);
1087 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_UINT32))
1089 _dbus_string_shorten (&message->body, 1);
1093 return _dbus_marshal_uint32 (&message->body,
1094 message->byte_order, value);
1098 * Appends a double value to the message.
1100 * @param message the message
1101 * @param value the double value
1102 * @returns #TRUE on success
1105 dbus_message_append_double (DBusMessage *message,
1108 _dbus_assert (!message->locked);
1110 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_DOUBLE))
1112 _dbus_string_shorten (&message->body, 1);
1116 return _dbus_marshal_double (&message->body,
1117 message->byte_order, value);
1121 * Appends a UTF-8 string to the message.
1123 * @param message the message
1124 * @param value the string
1125 * @returns #TRUE on success
1128 dbus_message_append_string (DBusMessage *message,
1131 _dbus_assert (!message->locked);
1133 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING))
1135 _dbus_string_shorten (&message->body, 1);
1139 return _dbus_marshal_string (&message->body,
1140 message->byte_order, value);
1144 * Appends a byte array to the message.
1146 * @param message the message
1147 * @param value the array
1148 * @param len the length of the array
1149 * @returns #TRUE on success
1152 dbus_message_append_byte_array (DBusMessage *message,
1153 unsigned const char *value,
1156 _dbus_assert (!message->locked);
1158 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_BYTE_ARRAY))
1160 _dbus_string_shorten (&message->body, 1);
1164 return _dbus_marshal_byte_array (&message->body,
1165 message->byte_order, value, len);
1169 * Appends a string array to the message.
1171 * @param message the message
1172 * @param value the array
1173 * @param len the length of the array
1174 * @returns #TRUE on success
1177 dbus_message_append_string_array (DBusMessage *message,
1181 _dbus_assert (!message->locked);
1183 if (!_dbus_string_append_byte (&message->body, DBUS_TYPE_STRING_ARRAY))
1185 _dbus_string_shorten (&message->body, 1);
1189 return _dbus_marshal_string_array (&message->body,
1190 message->byte_order, value, len);
1194 * Gets fields from a message given a variable argument list.
1195 * The variable argument list should contain the type of the
1196 * field followed by a pointer to where the value should be
1197 * stored. The list is terminated with 0.
1199 * @todo rename get_args to avoid confusion with header fields
1201 * @param message the message
1202 * @param first_field_type the first field type
1203 * @param ... location for first field value, then list of type-location pairs
1204 * @returns result code
1207 dbus_message_get_fields (DBusMessage *message,
1208 int first_field_type,
1211 DBusResultCode retval;
1214 va_start (var_args, first_field_type);
1215 retval = dbus_message_get_fields_valist (message, first_field_type, var_args);
1222 * This function takes a va_list for use by language bindings
1224 * @todo this function (or some lower-level non-convenience function)
1225 * needs better error handling; should allow the application to
1226 * distinguish between out of memory, and bad data from the remote
1227 * app. It also needs to not leak a bunch of args when it gets
1228 * to the arg that's bad, as that would be a security hole
1229 * (allow one app to force another to leak memory)
1231 * @todo We need to free the field data when an error occurs.
1233 * @todo rename get_args_valist to avoid confusion with header fields
1235 * @see dbus_message_get_fields
1236 * @param message the message
1237 * @param first_field_type type of the first field
1238 * @param var_args return location for first field, followed by list of type/location pairs
1239 * @returns result code
1242 dbus_message_get_fields_valist (DBusMessage *message,
1243 int first_field_type,
1246 int spec_type, msg_type, i;
1247 DBusMessageIter *iter;
1249 iter = dbus_message_get_fields_iter (message);
1252 return DBUS_RESULT_NO_MEMORY;
1254 spec_type = first_field_type;
1257 while (spec_type != 0)
1259 msg_type = dbus_message_iter_get_field_type (iter);
1261 if (msg_type != spec_type)
1263 _dbus_verbose ("Field %d is specified to be of type \"%s\", but "
1264 "is actually of type \"%s\"\n", i,
1265 _dbus_type_to_string (spec_type),
1266 _dbus_type_to_string (msg_type));
1267 dbus_message_iter_unref (iter);
1269 return DBUS_RESULT_INVALID_FIELDS;
1274 case DBUS_TYPE_INT32:
1278 ptr = va_arg (var_args, dbus_int32_t *);
1280 *ptr = dbus_message_iter_get_int32 (iter);
1283 case DBUS_TYPE_UINT32:
1287 ptr = va_arg (var_args, dbus_uint32_t *);
1289 *ptr = dbus_message_iter_get_uint32 (iter);
1293 case DBUS_TYPE_DOUBLE:
1297 ptr = va_arg (var_args, double *);
1299 *ptr = dbus_message_iter_get_double (iter);
1303 case DBUS_TYPE_STRING:
1307 ptr = va_arg (var_args, char **);
1309 *ptr = dbus_message_iter_get_string (iter);
1312 return DBUS_RESULT_NO_MEMORY;
1317 case DBUS_TYPE_BYTE_ARRAY:
1319 unsigned char **ptr;
1322 ptr = va_arg (var_args, unsigned char **);
1323 len = va_arg (var_args, int *);
1325 *ptr = dbus_message_iter_get_byte_array (iter, len);
1328 return DBUS_RESULT_NO_MEMORY;
1332 case DBUS_TYPE_STRING_ARRAY:
1337 ptr = va_arg (var_args, char ***);
1338 len = va_arg (var_args, int *);
1340 *ptr = dbus_message_iter_get_string_array (iter, len);
1343 return DBUS_RESULT_NO_MEMORY;
1348 _dbus_warn ("Unknown field type %d\n", spec_type);
1351 spec_type = va_arg (var_args, int);
1352 if (spec_type != 0 && !dbus_message_iter_next (iter))
1354 _dbus_verbose ("More fields than exist in the message were specified or field is corrupt\n");
1356 dbus_message_iter_unref (iter);
1357 return DBUS_RESULT_INVALID_FIELDS;
1362 dbus_message_iter_unref (iter);
1363 return DBUS_RESULT_SUCCESS;
1367 * Returns a DBusMessageIter representing the fields of the
1368 * message passed in.
1370 * @todo IMO the message iter should follow the GtkTextIter pattern,
1371 * a static object with a "stamp" value used to detect invalid
1372 * iter uses (uninitialized or after changing the message).
1373 * ref/unref is kind of annoying to deal with, and slower too.
1374 * This implies not ref'ing the message from the iter.
1376 * @todo rename get_args_iter to avoid confusion with header fields
1378 * @param message the message
1379 * @returns a new iter.
1382 dbus_message_get_fields_iter (DBusMessage *message)
1384 DBusMessageIter *iter;
1386 iter = dbus_new (DBusMessageIter, 1);
1388 dbus_message_ref (message);
1391 iter->message = message;
1398 * Increments the reference count of a DBusMessageIter.
1400 * @param iter the message iter
1401 * @see dbus_message_iter_unref
1404 dbus_message_iter_ref (DBusMessageIter *iter)
1406 _dbus_assert (iter->refcount > 0);
1408 iter->refcount += 1;
1412 * Decrements the reference count of a DBusMessageIter.
1414 * @param iter The message iter
1415 * @see dbus_message_iter_ref
1418 dbus_message_iter_unref (DBusMessageIter *iter)
1420 _dbus_assert (iter->refcount > 0);
1422 iter->refcount -= 1;
1424 if (iter->refcount == 0)
1426 dbus_message_unref (iter->message);
1433 * Checks if an iterator has any more fields.
1435 * @param iter the message iter
1436 * @returns #TRUE if there are more fields
1440 dbus_message_iter_has_next (DBusMessageIter *iter)
1444 if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
1445 iter->message->byte_order,
1446 iter->pos, &end_pos))
1449 if (end_pos >= _dbus_string_get_length (&iter->message->body))
1456 * Moves the iterator to the next field.
1458 * @param iter The message iter
1459 * @returns #TRUE if the iterator was moved to the next field
1462 dbus_message_iter_next (DBusMessageIter *iter)
1466 if (!_dbus_marshal_get_arg_end_pos (&iter->message->body,
1467 iter->message->byte_order,
1468 iter->pos, &end_pos))
1471 if (end_pos >= _dbus_string_get_length (&iter->message->body))
1474 iter->pos = end_pos;
1480 * Returns the field type of the field that the
1481 * message iterator points at.
1483 * @param iter the message iter
1484 * @returns the field type
1487 dbus_message_iter_get_field_type (DBusMessageIter *iter)
1491 if (iter->pos >= _dbus_string_get_length (&iter->message->body))
1492 return DBUS_TYPE_INVALID;
1494 _dbus_string_get_const_data_len (&iter->message->body, &data, iter->pos, 1);
1496 if (*data > DBUS_TYPE_INVALID && *data <= DBUS_TYPE_STRING_ARRAY)
1499 return DBUS_TYPE_INVALID;
1503 * Returns the string value that an iterator may point to.
1504 * Note that you need to check that the iterator points to
1505 * a string value before using this function.
1507 * @see dbus_message_iter_get_field_type
1508 * @param iter the message iter
1509 * @returns the string
1512 dbus_message_iter_get_string (DBusMessageIter *iter)
1514 _dbus_assert (dbus_message_iter_get_field_type (iter) == DBUS_TYPE_STRING);
1516 return _dbus_demarshal_string (&iter->message->body, iter->message->byte_order,
1517 iter->pos + 1, NULL);
1521 * Returns the 32 bit signed integer value that an iterator may point to.
1522 * Note that you need to check that the iterator points to
1523 * a string value before using this function.
1525 * @see dbus_message_iter_get_field_type
1526 * @param iter the message iter
1527 * @returns the integer
1530 dbus_message_iter_get_int32 (DBusMessageIter *iter)
1532 return _dbus_demarshal_int32 (&iter->message->body, iter->message->byte_order,
1533 iter->pos + 1, NULL);
1537 * Returns the 32 bit unsigned integer value that an iterator may point to.
1538 * Note that you need to check that the iterator points to
1539 * a string value before using this function.
1541 * @see dbus_message_iter_get_field_type
1542 * @param iter the message iter
1543 * @returns the integer
1546 dbus_message_iter_get_uint32 (DBusMessageIter *iter)
1548 return _dbus_demarshal_uint32 (&iter->message->body, iter->message->byte_order,
1549 iter->pos + 1, NULL);
1553 * Returns the double value that an iterator may point to.
1554 * Note that you need to check that the iterator points to
1555 * a string value before using this function.
1557 * @see dbus_message_iter_get_field_type
1558 * @param iter the message iter
1559 * @returns the double
1562 dbus_message_iter_get_double (DBusMessageIter *iter)
1564 return _dbus_demarshal_double (&iter->message->body, iter->message->byte_order,
1565 iter->pos + 1, NULL);
1569 * Returns the byte array that the iterator may point to.
1570 * Note that you need to check that the iterator points
1571 * to a byte array prior to using this function.
1573 * @todo this function should probably take "unsigned char **" as
1574 * an out param argument, and return boolean or result code.
1576 * @param iter the iterator
1577 * @param len return location for length of byte array
1578 * @returns the byte array
1581 dbus_message_iter_get_byte_array (DBusMessageIter *iter,
1584 _dbus_assert (dbus_message_iter_get_field_type (iter) == DBUS_TYPE_BYTE_ARRAY);
1586 return _dbus_demarshal_byte_array (&iter->message->body, iter->message->byte_order,
1587 iter->pos + 1, NULL, len);
1591 * Returns the string array that the iterator may point to.
1592 * Note that you need to check that the iterator points
1593 * to a byte array prior to using this function.
1595 * @todo this function should probably take "char **" as
1596 * an out param argument, and return boolean or result code.
1598 * @param iter the iterator
1599 * @param len return location for length of byte array
1600 * @returns the byte array
1603 dbus_message_iter_get_string_array (DBusMessageIter *iter,
1606 _dbus_assert (dbus_message_iter_get_field_type (iter) == DBUS_TYPE_STRING_ARRAY);
1608 return _dbus_demarshal_string_array (&iter->message->body, iter->message->byte_order,
1609 iter->pos + 1, NULL, len);
1613 * Sets the message sender.
1615 * @param message the message
1616 * @param sender the sender
1617 * @returns #FALSE if not enough memory
1620 dbus_message_set_sender (DBusMessage *message,
1623 _dbus_assert (!message->locked);
1627 delete_string_field (message, FIELD_SENDER);
1632 return set_string_field (message,
1639 * Sets a flag indicating that the message is an error reply
1640 * message, i.e. an "exception" rather than a normal response.
1642 * @param message the message
1643 * @param is_error_reply #TRUE if this is an error message.
1646 dbus_message_set_is_error (DBusMessage *message,
1647 dbus_bool_t is_error_reply)
1651 _dbus_assert (!message->locked);
1653 _dbus_string_get_data_len (&message->header, &header, 1, 1);
1656 *header |= DBUS_HEADER_FLAG_ERROR;
1658 *header &= ~DBUS_HEADER_FLAG_ERROR;
1662 * Returns #TRUE if the message is an error
1663 * reply to some previous message we sent.
1665 * @param message the message
1666 * @returns #TRUE if the message is an error
1669 dbus_message_get_is_error (DBusMessage *message)
1673 _dbus_string_get_const_data_len (&message->header, &header, 1, 1);
1675 return (*header & DBUS_HEADER_FLAG_ERROR) != 0;
1679 * Gets the service which originated this message,
1680 * or #NULL if unknown or inapplicable.
1682 * @param message the message
1683 * @returns the service name or #NULL
1686 dbus_message_get_sender (DBusMessage *message)
1688 return get_string_field (message, FIELD_SENDER, NULL);
1694 * @addtogroup DBusMessageInternals
1699 * @typedef DBusMessageLoader
1701 * The DBusMessageLoader object encapsulates the process of converting
1702 * a byte stream into a series of DBusMessage. It buffers the incoming
1703 * bytes as efficiently as possible, and generates a queue of
1704 * messages. DBusMessageLoader is typically used as part of a
1705 * DBusTransport implementation. The DBusTransport then hands off
1706 * the loaded messages to a DBusConnection, making the messages
1707 * visible to the application.
1711 /* we definitely use signed ints for sizes, so don't exceed
1712 * _DBUS_INT_MAX; and add 16 for paranoia, since a message
1713 * over 128M is pretty nuts anyhow.
1717 * The maximum sane message size.
1719 #define MAX_SANE_MESSAGE_SIZE (_DBUS_INT_MAX/16)
1722 * Implementation details of DBusMessageLoader.
1723 * All members are private.
1725 struct DBusMessageLoader
1727 int refcount; /**< Reference count. */
1729 DBusString data; /**< Buffered data */
1731 DBusList *messages; /**< Complete messages. */
1733 long max_message_size; /**< Maximum size of a message */
1735 unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
1737 unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
1741 * The initial buffer size of the message loader.
1743 * @todo this should be based on min header size plus some average
1744 * body size, or something. Or rather, the min header size only, if we
1745 * want to try to read only the header, store that in a DBusMessage,
1746 * then read only the body and store that, etc., depends on
1747 * how we optimize _dbus_message_loader_get_buffer() and what
1748 * the exact message format is.
1750 #define INITIAL_LOADER_DATA_LEN 32
1753 * Creates a new message loader. Returns #NULL if memory can't
1756 * @returns new loader, or #NULL.
1759 _dbus_message_loader_new (void)
1761 DBusMessageLoader *loader;
1763 loader = dbus_new0 (DBusMessageLoader, 1);
1767 loader->refcount = 1;
1769 /* Try to cap message size at something that won't *totally* hose
1770 * the system if we have a couple of them.
1772 loader->max_message_size = _DBUS_ONE_MEGABYTE * 32;
1774 if (!_dbus_string_init (&loader->data, _DBUS_INT_MAX))
1780 /* preallocate the buffer for speed, ignore failure */
1781 _dbus_string_set_length (&loader->data, INITIAL_LOADER_DATA_LEN);
1782 _dbus_string_set_length (&loader->data, 0);
1788 * Increments the reference count of the loader.
1790 * @param loader the loader.
1793 _dbus_message_loader_ref (DBusMessageLoader *loader)
1795 loader->refcount += 1;
1799 * Decrements the reference count of the loader and finalizes the
1800 * loader when the count reaches zero.
1802 * @param loader the loader.
1805 _dbus_message_loader_unref (DBusMessageLoader *loader)
1807 loader->refcount -= 1;
1808 if (loader->refcount == 0)
1810 _dbus_list_foreach (&loader->messages,
1811 (DBusForeachFunction) dbus_message_unref,
1813 _dbus_list_clear (&loader->messages);
1814 _dbus_string_free (&loader->data);
1820 * Gets the buffer to use for reading data from the network. Network
1821 * data is read directly into an allocated buffer, which is then used
1822 * in the DBusMessage, to avoid as many extra memcpy's as possible.
1823 * The buffer must always be returned immediately using
1824 * _dbus_message_loader_return_buffer(), even if no bytes are
1825 * successfully read.
1827 * @todo this function can be a lot more clever. For example
1828 * it can probably always return a buffer size to read exactly
1829 * the body of the next message, thus avoiding any memory wastage
1832 * @param loader the message loader.
1833 * @param buffer the buffer
1836 _dbus_message_loader_get_buffer (DBusMessageLoader *loader,
1837 DBusString **buffer)
1839 _dbus_assert (!loader->buffer_outstanding);
1841 *buffer = &loader->data;
1843 loader->buffer_outstanding = TRUE;
1847 * The smallest header size that can occur.
1848 * (It won't be valid)
1850 #define DBUS_MINIMUM_HEADER_SIZE 16
1852 /** Pack four characters as in "abcd" into a uint32 */
1853 #define FOUR_CHARS_TO_UINT32(a, b, c, d) \
1854 ((((dbus_uint32_t)a) << 24) | \
1855 (((dbus_uint32_t)b) << 16) | \
1856 (((dbus_uint32_t)c) << 8) | \
1859 /** DBUS_HEADER_FIELD_NAME packed into a dbus_uint32_t */
1860 #define DBUS_HEADER_FIELD_NAME_AS_UINT32 \
1861 FOUR_CHARS_TO_UINT32 ('n', 'a', 'm', 'e')
1863 /** DBUS_HEADER_FIELD_SERVICE packed into a dbus_uint32_t */
1864 #define DBUS_HEADER_FIELD_SERVICE_AS_UINT32 \
1865 FOUR_CHARS_TO_UINT32 ('s', 'r', 'v', 'c')
1867 /** DBUS_HEADER_FIELD_REPLY packed into a dbus_uint32_t */
1868 #define DBUS_HEADER_FIELD_REPLY_AS_UINT32 \
1869 FOUR_CHARS_TO_UINT32 ('r', 'p', 'l', 'y')
1871 /** DBUS_HEADER_FIELD_SENDER Packed into a dbus_uint32_t */
1872 #define DBUS_HEADER_FIELD_SENDER_AS_UINT32 \
1873 FOUR_CHARS_TO_UINT32 ('s', 'n', 'd', 'r')
1876 decode_header_data (const DBusString *data,
1879 HeaderField fields[FIELD_LAST])
1885 if (header_len < 16)
1889 while (i < FIELD_LAST)
1891 fields[i].offset = -1;
1895 fields[FIELD_HEADER_LENGTH].offset = 4;
1896 fields[FIELD_BODY_LENGTH].offset = 8;
1897 fields[FIELD_CLIENT_SERIAL].offset = 12;
1899 /* Now handle the named fields. A real named field is at least 4
1900 * bytes for the name, plus a type code (1 byte) plus padding. So
1901 * if we have less than 8 bytes left, it must be alignment padding,
1902 * not a field. While >= 8 bytes can't be entirely alignment
1906 while ((pos + 7) < header_len)
1908 pos = _DBUS_ALIGN_VALUE (pos, 4);
1910 if ((pos + 4) > header_len)
1913 _dbus_string_get_const_data_len (data, &field, pos, 4);
1916 _dbus_assert (_DBUS_ALIGN_ADDRESS (field, 4) == field);
1918 /* I believe FROM_BE is right, but if not we'll find out
1921 switch (DBUS_UINT32_FROM_BE (*(int*)field))
1923 case DBUS_HEADER_FIELD_SERVICE_AS_UINT32:
1924 if (fields[FIELD_SERVICE].offset >= 0)
1926 _dbus_verbose ("%s field provided twice\n",
1927 DBUS_HEADER_FIELD_SERVICE);
1931 fields[FIELD_SERVICE].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1932 _dbus_verbose ("Found service name at offset %d\n",
1933 fields[FIELD_SERVICE].offset);
1936 case DBUS_HEADER_FIELD_NAME_AS_UINT32:
1937 if (fields[FIELD_NAME].offset >= 0)
1939 _dbus_verbose ("%s field provided twice\n",
1940 DBUS_HEADER_FIELD_NAME);
1944 fields[FIELD_NAME].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1946 _dbus_verbose ("Found message name at offset %d\n",
1947 fields[FIELD_NAME].offset);
1949 case DBUS_HEADER_FIELD_SENDER_AS_UINT32:
1950 if (fields[FIELD_SENDER].offset >= 0)
1952 _dbus_verbose ("%s field provided twice\n",
1953 DBUS_HEADER_FIELD_SENDER);
1957 fields[FIELD_SENDER].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1959 _dbus_verbose ("Found sender name at offset %d\n",
1960 fields[FIELD_NAME].offset);
1963 case DBUS_HEADER_FIELD_REPLY_AS_UINT32:
1964 if (fields[FIELD_REPLY_SERIAL].offset >= 0)
1966 _dbus_verbose ("%s field provided twice\n",
1967 DBUS_HEADER_FIELD_REPLY);
1971 fields[FIELD_REPLY_SERIAL].offset = _DBUS_ALIGN_VALUE (pos + 1, 4);
1973 _dbus_verbose ("Found reply serial at offset %d\n",
1974 fields[FIELD_REPLY_SERIAL].offset);
1978 _dbus_verbose ("Ignoring an unknown header field: %c%c%c%c\n",
1979 field[0], field[1], field[2], field[3]);
1982 if (!_dbus_marshal_validate_arg (data, byte_order, pos, &new_pos))
1985 if (new_pos > header_len)
1991 if (pos < header_len)
1993 /* Alignment padding, verify that it's nul */
1994 _dbus_assert ((header_len - pos) < 8);
1996 if (!_dbus_string_validate_nul (data,
1997 pos, (header_len - pos)))
1999 _dbus_verbose ("header alignment padding is not nul\n");
2008 * Returns a buffer obtained from _dbus_message_loader_get_buffer(),
2009 * indicating to the loader how many bytes of the buffer were filled
2010 * in. This function must always be called, even if no bytes were
2011 * successfully read.
2013 * @param loader the loader.
2014 * @param buffer the buffer.
2015 * @param bytes_read number of bytes that were read into the buffer.
2018 _dbus_message_loader_return_buffer (DBusMessageLoader *loader,
2022 _dbus_assert (loader->buffer_outstanding);
2023 _dbus_assert (buffer == &loader->data);
2025 loader->buffer_outstanding = FALSE;
2027 if (loader->corrupted)
2030 while (_dbus_string_get_length (&loader->data) >= 16)
2032 DBusMessage *message;
2033 const char *header_data;
2034 int byte_order, header_len, body_len;
2035 dbus_uint32_t header_len_unsigned, body_len_unsigned;
2037 _dbus_string_get_const_data_len (&loader->data, &header_data, 0, 16);
2039 _dbus_assert (_DBUS_ALIGN_ADDRESS (header_data, 4) == header_data);
2041 if (header_data[2] != DBUS_MAJOR_PROTOCOL_VERSION)
2043 _dbus_verbose ("Message has protocol version %d ours is %d\n",
2044 (int) header_data[2], DBUS_MAJOR_PROTOCOL_VERSION);
2045 loader->corrupted = TRUE;
2049 byte_order = header_data[0];
2051 if (byte_order != DBUS_LITTLE_ENDIAN &&
2052 byte_order != DBUS_BIG_ENDIAN)
2054 _dbus_verbose ("Message with bad byte order '%c' received\n",
2056 loader->corrupted = TRUE;
2060 header_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 4);
2061 body_len_unsigned = _dbus_unpack_uint32 (byte_order, header_data + 8);
2063 if (header_len_unsigned < 16)
2065 _dbus_verbose ("Message had broken too-small header length %u\n",
2066 header_len_unsigned);
2067 loader->corrupted = TRUE;
2071 if (header_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE ||
2072 body_len_unsigned > (unsigned) MAX_SANE_MESSAGE_SIZE)
2074 _dbus_verbose ("Header or body length too large (%u %u)\n",
2075 header_len_unsigned,
2077 loader->corrupted = TRUE;
2081 /* Now that we know the values are in signed range, get
2082 * rid of stupid unsigned, just causes bugs
2084 header_len = header_len_unsigned;
2085 body_len = body_len_unsigned;
2087 if (_DBUS_ALIGN_VALUE (header_len, 8) != header_len_unsigned)
2089 _dbus_verbose ("header length %d is not aligned to 8 bytes\n",
2091 loader->corrupted = TRUE;
2095 if (header_len + body_len > loader->max_message_size)
2097 _dbus_verbose ("Message claimed length header = %d body = %d exceeds max message length %d\n",
2098 header_len, body_len, loader->max_message_size);
2099 loader->corrupted = TRUE;
2103 if (_dbus_string_get_length (&loader->data) >= (header_len + body_len))
2105 HeaderField fields[FIELD_LAST];
2109 if (!decode_header_data (&loader->data, header_len, byte_order,
2112 loader->corrupted = TRUE;
2116 next_arg = header_len;
2117 while (next_arg < (header_len + body_len))
2119 int prev = next_arg;
2121 if (!_dbus_marshal_validate_arg (&loader->data,
2126 loader->corrupted = TRUE;
2130 _dbus_assert (next_arg > prev);
2133 if (next_arg > (header_len + body_len))
2135 _dbus_verbose ("end of last arg at %d but message has len %d+%d=%d\n",
2136 next_arg, header_len, body_len,
2137 header_len + body_len);
2138 loader->corrupted = TRUE;
2142 message = dbus_message_new_empty_header ();
2143 if (message == NULL)
2144 break; /* ugh, postpone this I guess. */
2146 message->byte_order = byte_order;
2148 /* Copy in the offsets we found */
2150 while (i < FIELD_LAST)
2152 message->header_fields[i] = fields[i];
2156 if (!_dbus_list_append (&loader->messages, message))
2158 dbus_message_unref (message);
2162 _dbus_assert (_dbus_string_get_length (&message->header) == 0);
2163 _dbus_assert (_dbus_string_get_length (&message->body) == 0);
2165 _dbus_assert (_dbus_string_get_length (&loader->data) >=
2166 (header_len + body_len));
2168 if (!_dbus_string_move_len (&loader->data, 0, header_len, &message->header, 0))
2170 _dbus_list_remove_last (&loader->messages, message);
2171 dbus_message_unref (message);
2175 if (!_dbus_string_move_len (&loader->data, 0, body_len, &message->body, 0))
2179 /* put the header back, we'll try again later */
2180 result = _dbus_string_copy_len (&message->header, 0, header_len,
2182 _dbus_assert (result); /* because DBusString never reallocs smaller */
2184 _dbus_list_remove_last (&loader->messages, message);
2185 dbus_message_unref (message);
2189 _dbus_assert (_dbus_string_get_length (&message->header) == header_len);
2190 _dbus_assert (_dbus_string_get_length (&message->body) == body_len);
2192 _dbus_verbose ("Loaded message %p\n", message);
2200 * Pops a loaded message (passing ownership of the message
2201 * to the caller). Returns #NULL if no messages have been
2204 * @param loader the loader.
2205 * @returns the next message, or #NULL if none.
2208 _dbus_message_loader_pop_message (DBusMessageLoader *loader)
2210 return _dbus_list_pop_first (&loader->messages);
2215 * Checks whether the loader is confused due to bad data.
2216 * If messages are received that are invalid, the
2217 * loader gets confused and gives up permanently.
2218 * This state is called "corrupted."
2220 * @param loader the loader
2221 * @returns #TRUE if the loader is hosed.
2224 _dbus_message_loader_get_is_corrupted (DBusMessageLoader *loader)
2226 return loader->corrupted;
2230 * Sets the maximum size message we allow.
2232 * @param loader the loader
2233 * @param size the max message size in bytes
2236 _dbus_message_loader_set_max_message_size (DBusMessageLoader *loader,
2239 if (size > MAX_SANE_MESSAGE_SIZE)
2241 _dbus_verbose ("clamping requested max message size %ld to %d\n",
2242 size, MAX_SANE_MESSAGE_SIZE);
2243 size = MAX_SANE_MESSAGE_SIZE;
2245 loader->max_message_size = size;
2249 * Gets the maximum allowed message size in bytes.
2251 * @param loader the loader
2252 * @returns max size in bytes
2255 _dbus_message_loader_get_max_message_size (DBusMessageLoader *loader)
2257 return loader->max_message_size;
2261 #ifdef DBUS_BUILD_TESTS
2262 #include "dbus-test.h"
2266 message_iter_test (DBusMessage *message)
2268 DBusMessageIter *iter;
2271 iter = dbus_message_get_fields_iter (message);
2274 if (dbus_message_iter_get_field_type (iter) != DBUS_TYPE_STRING)
2275 _dbus_assert_not_reached ("Field type isn't string");
2277 str = dbus_message_iter_get_string (iter);
2278 if (strcmp (str, "Test string") != 0)
2279 _dbus_assert_not_reached ("Strings differ");
2282 if (!dbus_message_iter_next (iter))
2283 _dbus_assert_not_reached ("Reached end of fields");
2285 /* Signed integer tests */
2286 if (dbus_message_iter_get_field_type (iter) != DBUS_TYPE_INT32)
2287 _dbus_assert_not_reached ("Field type isn't int32");
2289 if (dbus_message_iter_get_int32 (iter) != -0x12345678)
2290 _dbus_assert_not_reached ("Signed integers differ");
2292 if (!dbus_message_iter_next (iter))
2293 _dbus_assert_not_reached ("Reached end of fields");
2295 /* Unsigned integer tests */
2296 if (dbus_message_iter_get_field_type (iter) != DBUS_TYPE_UINT32)
2297 _dbus_assert_not_reached ("Field type isn't int32");
2299 if (dbus_message_iter_get_int32 (iter) != 0xedd1e)
2300 _dbus_assert_not_reached ("Unsigned integers differ");
2302 if (!dbus_message_iter_next (iter))
2303 _dbus_assert_not_reached ("Reached end of fields");
2306 if (dbus_message_iter_get_field_type (iter) != DBUS_TYPE_DOUBLE)
2307 _dbus_assert_not_reached ("Field type isn't double");
2309 if (dbus_message_iter_get_double (iter) != 3.14159)
2310 _dbus_assert_not_reached ("Doubles differ");
2312 if (dbus_message_iter_next (iter))
2313 _dbus_assert_not_reached ("Didn't reach end of fields");
2315 dbus_message_iter_unref (iter);
2319 check_message_handling (DBusMessage *message)
2321 DBusMessageIter *iter;
2324 dbus_int32_t client_serial;
2329 client_serial = _dbus_message_get_client_serial (message);
2331 /* can't use set_client_serial due to the assertions at the start of it */
2332 set_int_field (message, FIELD_CLIENT_SERIAL,
2335 if (client_serial != _dbus_message_get_client_serial (message))
2337 _dbus_warn ("get/set cycle for client_serial did not succeed\n");
2341 /* If we implement message_set_field (message, n, value)
2342 * then we would want to test it here
2345 iter = dbus_message_get_fields_iter (message);
2346 while ((type = dbus_message_iter_get_field_type (iter)) != DBUS_TYPE_INVALID)
2350 case DBUS_TYPE_STRING:
2353 str = dbus_message_iter_get_string (iter);
2359 if (!dbus_message_iter_next (iter))
2367 dbus_message_iter_unref (iter);
2373 check_have_valid_message (DBusMessageLoader *loader)
2375 DBusMessage *message;
2381 if (_dbus_message_loader_get_is_corrupted (loader))
2383 _dbus_warn ("loader corrupted on message that was expected to be valid\n");
2387 message = _dbus_message_loader_pop_message (loader);
2388 if (message == NULL)
2390 _dbus_warn ("didn't load message that was expected to be valid (message not popped)\n");
2394 if (_dbus_string_get_length (&loader->data) > 0)
2396 _dbus_warn ("had leftover bytes from expected-to-be-valid single message\n");
2400 /* Verify that we're able to properly deal with the message.
2401 * For example, this would detect improper handling of messages
2402 * in nonstandard byte order.
2404 if (!check_message_handling (message))
2411 dbus_message_unref (message);
2416 check_invalid_message (DBusMessageLoader *loader)
2422 if (!_dbus_message_loader_get_is_corrupted (loader))
2424 _dbus_warn ("loader not corrupted on message that was expected to be invalid\n");
2435 check_incomplete_message (DBusMessageLoader *loader)
2437 DBusMessage *message;
2443 if (_dbus_message_loader_get_is_corrupted (loader))
2445 _dbus_warn ("loader corrupted on message that was expected to be valid (but incomplete)\n");
2449 message = _dbus_message_loader_pop_message (loader);
2450 if (message != NULL)
2452 _dbus_warn ("loaded message that was expected to be incomplete\n");
2460 dbus_message_unref (message);
2465 check_loader_results (DBusMessageLoader *loader,
2466 DBusMessageValidity validity)
2470 case _DBUS_MESSAGE_VALID:
2471 return check_have_valid_message (loader);
2472 case _DBUS_MESSAGE_INVALID:
2473 return check_invalid_message (loader);
2474 case _DBUS_MESSAGE_INCOMPLETE:
2475 return check_incomplete_message (loader);
2476 case _DBUS_MESSAGE_UNKNOWN:
2480 _dbus_assert_not_reached ("bad DBusMessageValidity");
2486 * Loads the message in the given message file.
2488 * @param filename filename to load
2489 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
2490 * @param data string to load message into
2491 * @returns #TRUE if the message was loaded
2494 dbus_internal_do_not_use_load_message_file (const DBusString *filename,
2504 DBusResultCode result;
2506 result = _dbus_file_get_contents (data, filename);
2507 if (result != DBUS_RESULT_SUCCESS)
2510 _dbus_string_get_const_data (filename, &s);
2511 _dbus_warn ("Could not load message file %s\n", s);
2517 if (!_dbus_message_data_load (data, filename))
2520 _dbus_string_get_const_data (filename, &s);
2521 _dbus_warn ("Could not load message file %s\n", s);
2534 * Tries loading the message in the given message file
2535 * and verifies that DBusMessageLoader can handle it.
2537 * @param filename filename to load
2538 * @param is_raw if #TRUE load as binary data, if #FALSE as message builder language
2539 * @param expected_validity what the message has to be like to return #TRUE
2540 * @returns #TRUE if the message has the expected validity
2543 dbus_internal_do_not_use_try_message_file (const DBusString *filename,
2545 DBusMessageValidity expected_validity)
2552 if (!_dbus_string_init (&data, _DBUS_INT_MAX))
2553 _dbus_assert_not_reached ("could not allocate string\n");
2555 if (!dbus_internal_do_not_use_load_message_file (filename, is_raw,
2559 retval = dbus_internal_do_not_use_try_message_data (&data, expected_validity);
2567 if (_dbus_string_get_length (&data) > 0)
2568 _dbus_verbose_bytes_of_string (&data, 0,
2569 _dbus_string_get_length (&data));
2571 _dbus_string_get_const_data (filename, &s);
2572 _dbus_warn ("Failed message loader test on %s\n",
2576 _dbus_string_free (&data);
2582 * Tries loading the given message data.
2585 * @param data the message data
2586 * @param expected_validity what the message has to be like to return #TRUE
2587 * @returns #TRUE if the message has the expected validity
2590 dbus_internal_do_not_use_try_message_data (const DBusString *data,
2591 DBusMessageValidity expected_validity)
2593 DBusMessageLoader *loader;
2601 /* Write the data one byte at a time */
2603 loader = _dbus_message_loader_new ();
2605 len = _dbus_string_get_length (data);
2606 for (i = 0; i < len; i++)
2610 _dbus_message_loader_get_buffer (loader, &buffer);
2611 _dbus_string_append_byte (buffer,
2612 _dbus_string_get_byte (data, i));
2613 _dbus_message_loader_return_buffer (loader, buffer, 1);
2616 if (!check_loader_results (loader, expected_validity))
2619 _dbus_message_loader_unref (loader);
2622 /* Write the data all at once */
2624 loader = _dbus_message_loader_new ();
2629 _dbus_message_loader_get_buffer (loader, &buffer);
2630 _dbus_string_copy (data, 0, buffer,
2631 _dbus_string_get_length (buffer));
2632 _dbus_message_loader_return_buffer (loader, buffer, 1);
2635 if (!check_loader_results (loader, expected_validity))
2638 _dbus_message_loader_unref (loader);
2641 /* Write the data 2 bytes at a time */
2643 loader = _dbus_message_loader_new ();
2645 len = _dbus_string_get_length (data);
2646 for (i = 0; i < len; i += 2)
2650 _dbus_message_loader_get_buffer (loader, &buffer);
2651 _dbus_string_append_byte (buffer,
2652 _dbus_string_get_byte (data, i));
2654 _dbus_string_append_byte (buffer,
2655 _dbus_string_get_byte (data, i+1));
2656 _dbus_message_loader_return_buffer (loader, buffer, 1);
2659 if (!check_loader_results (loader, expected_validity))
2662 _dbus_message_loader_unref (loader);
2670 _dbus_message_loader_unref (loader);
2676 process_test_subdir (const DBusString *test_base_dir,
2678 DBusMessageValidity validity,
2679 DBusForeachMessageFileFunc function,
2682 DBusString test_directory;
2683 DBusString filename;
2686 DBusResultCode result;
2691 if (!_dbus_string_init (&test_directory, _DBUS_INT_MAX))
2692 _dbus_assert_not_reached ("didn't allocate test_directory\n");
2694 _dbus_string_init_const (&filename, subdir);
2696 if (!_dbus_string_copy (test_base_dir, 0,
2697 &test_directory, 0))
2698 _dbus_assert_not_reached ("couldn't copy test_base_dir to test_directory");
2700 if (!_dbus_concat_dir_and_file (&test_directory, &filename))
2701 _dbus_assert_not_reached ("couldn't allocate full path");
2703 _dbus_string_free (&filename);
2704 if (!_dbus_string_init (&filename, _DBUS_INT_MAX))
2705 _dbus_assert_not_reached ("didn't allocate filename string\n");
2707 dir = _dbus_directory_open (&test_directory, &result);
2711 _dbus_string_get_const_data (&test_directory, &s);
2712 _dbus_warn ("Could not open %s: %s\n", s,
2713 dbus_result_to_string (result));
2717 printf ("Testing:\n");
2719 result = DBUS_RESULT_SUCCESS;
2721 while (_dbus_directory_get_next_file (dir, &filename, &result))
2723 DBusString full_path;
2726 if (!_dbus_string_init (&full_path, _DBUS_INT_MAX))
2727 _dbus_assert_not_reached ("couldn't init string");
2729 if (!_dbus_string_copy (&test_directory, 0, &full_path, 0))
2730 _dbus_assert_not_reached ("couldn't copy dir to full_path");
2732 if (!_dbus_concat_dir_and_file (&full_path, &filename))
2733 _dbus_assert_not_reached ("couldn't concat file to dir");
2735 if (_dbus_string_ends_with_c_str (&filename, ".message"))
2737 else if (_dbus_string_ends_with_c_str (&filename, ".message-raw"))
2741 const char *filename_c;
2742 _dbus_string_get_const_data (&filename, &filename_c);
2743 _dbus_verbose ("Skipping non-.message file %s\n",
2750 _dbus_string_get_const_data (&filename, &s);
2751 printf (" %s\n", s);
2754 _dbus_verbose (" expecting %s\n",
2755 validity == _DBUS_MESSAGE_VALID ? "valid" :
2756 (validity == _DBUS_MESSAGE_INVALID ? "invalid" :
2757 (validity == _DBUS_MESSAGE_INCOMPLETE ? "incomplete" : "unknown")));
2759 if (! (*function) (&full_path, is_raw, validity, user_data))
2761 _dbus_string_free (&full_path);
2765 _dbus_string_free (&full_path);
2768 if (result != DBUS_RESULT_SUCCESS)
2771 _dbus_string_get_const_data (&test_directory, &s);
2772 _dbus_warn ("Could not get next file in %s: %s\n",
2773 s, dbus_result_to_string (result));
2782 _dbus_directory_close (dir);
2783 _dbus_string_free (&test_directory);
2784 _dbus_string_free (&filename);
2790 * Runs the given function on every message file in the test suite.
2791 * The function should return #FALSE on test failure or fatal error.
2793 * @param test_data_dir root dir of the test suite data files (top_srcdir/test/data)
2794 * @param func the function to run
2795 * @param user_data data for function
2796 * @returns #FALSE if there's a failure
2799 dbus_internal_do_not_use_foreach_message_file (const char *test_data_dir,
2800 DBusForeachMessageFileFunc func,
2803 DBusString test_directory;
2808 _dbus_string_init_const (&test_directory, test_data_dir);
2810 if (!process_test_subdir (&test_directory, "valid-messages",
2811 _DBUS_MESSAGE_VALID, func, user_data))
2814 if (!process_test_subdir (&test_directory, "invalid-messages",
2815 _DBUS_MESSAGE_INVALID, func, user_data))
2818 if (!process_test_subdir (&test_directory, "incomplete-messages",
2819 _DBUS_MESSAGE_INCOMPLETE, func, user_data))
2826 _dbus_string_free (&test_directory);
2832 * @ingroup DBusMessageInternals
2833 * Unit test for DBusMessage.
2835 * @returns #TRUE on success.
2838 _dbus_message_test (const char *test_data_dir)
2840 DBusMessage *message;
2841 DBusMessageLoader *loader;
2844 dbus_int32_t our_int;
2848 /* Test the vararg functions */
2849 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
2850 _dbus_message_set_client_serial (message, 1);
2851 dbus_message_append_fields (message,
2852 DBUS_TYPE_INT32, -0x12345678,
2853 DBUS_TYPE_STRING, "Test string",
2854 DBUS_TYPE_DOUBLE, 3.14159,
2856 _dbus_verbose_bytes_of_string (&message->header, 0,
2857 _dbus_string_get_length (&message->header));
2858 _dbus_verbose_bytes_of_string (&message->body, 0,
2859 _dbus_string_get_length (&message->body));
2861 if (dbus_message_get_fields (message,
2862 DBUS_TYPE_INT32, &our_int,
2863 DBUS_TYPE_STRING, &our_str,
2864 DBUS_TYPE_DOUBLE, &our_double,
2865 0) != DBUS_RESULT_SUCCESS)
2866 _dbus_assert_not_reached ("Could not get fields");
2868 if (our_int != -0x12345678)
2869 _dbus_assert_not_reached ("integers differ!");
2871 if (our_double != 3.14159)
2872 _dbus_assert_not_reached ("doubles differ!");
2874 if (strcmp (our_str, "Test string") != 0)
2875 _dbus_assert_not_reached ("strings differ!");
2877 dbus_free (our_str);
2878 dbus_message_unref (message);
2880 message = dbus_message_new ("org.freedesktop.DBus.Test", "testMessage");
2881 _dbus_message_set_client_serial (message, 1);
2882 _dbus_message_set_reply_serial (message, 0x12345678);
2884 dbus_message_append_string (message, "Test string");
2885 dbus_message_append_int32 (message, -0x12345678);
2886 dbus_message_append_uint32 (message, 0xedd1e);
2887 dbus_message_append_double (message, 3.14159);
2889 message_iter_test (message);
2891 /* Message loader test */
2892 _dbus_message_lock (message);
2893 loader = _dbus_message_loader_new ();
2895 /* Write the header data one byte at a time */
2896 _dbus_string_get_const_data (&message->header, &data);
2897 for (i = 0; i < _dbus_string_get_length (&message->header); i++)
2901 _dbus_message_loader_get_buffer (loader, &buffer);
2902 _dbus_string_append_byte (buffer, data[i]);
2903 _dbus_message_loader_return_buffer (loader, buffer, 1);
2906 /* Write the body data one byte at a time */
2907 _dbus_string_get_const_data (&message->body, &data);
2908 for (i = 0; i < _dbus_string_get_length (&message->body); i++)
2912 _dbus_message_loader_get_buffer (loader, &buffer);
2913 _dbus_string_append_byte (buffer, data[i]);
2914 _dbus_message_loader_return_buffer (loader, buffer, 1);
2917 dbus_message_unref (message);
2919 /* Now pop back the message */
2920 if (_dbus_message_loader_get_is_corrupted (loader))
2921 _dbus_assert_not_reached ("message loader corrupted");
2923 message = _dbus_message_loader_pop_message (loader);
2925 _dbus_assert_not_reached ("received a NULL message");
2927 if (_dbus_message_get_reply_serial (message) != 0x12345678)
2928 _dbus_assert_not_reached ("reply serial fields differ");
2930 message_iter_test (message);
2932 dbus_message_unref (message);
2933 _dbus_message_loader_unref (loader);
2935 /* Now load every message in test_data_dir if we have one */
2936 if (test_data_dir == NULL)
2939 return dbus_internal_do_not_use_foreach_message_file (test_data_dir,
2940 (DBusForeachMessageFileFunc)
2941 dbus_internal_do_not_use_try_message_file,
2945 #endif /* DBUS_BUILD_TESTS */