summaryrefslogtreecommitdiffstats
path: root/dbus/dbus-protocol.h
blob: c662d72109ebc9eb75fa91ce74e418a4527af438 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
/* -*- mode: C; c-file-style: "gnu" -*- */
/* dbus-protocol.h  D-Bus protocol constants
 *
 * Copyright (C) 2002, 2003  CodeFactory AB
 * Copyright (C) 2004, 2005 Red Hat, Inc.
 *
 * Licensed under the Academic Free License version 2.1
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

#ifndef DBUS_PROTOCOL_H
#define DBUS_PROTOCOL_H

/* Don't include anything in here from anywhere else. It's
 * intended for use by any random library.
 */

#ifdef  __cplusplus
extern "C" {
#endif

/* Message byte order */
#define DBUS_LITTLE_ENDIAN ('l')  /* LSB first */
#define DBUS_BIG_ENDIAN    ('B')  /* MSB first */

/* Protocol version */
#define DBUS_MAJOR_PROTOCOL_VERSION 1

/* Never a legitimate type */
#define DBUS_TYPE_INVALID       ((int) '\0')
#define DBUS_TYPE_INVALID_AS_STRING        "\0"

/* Primitive types */
#define DBUS_TYPE_BYTE          ((int) 'y')
#define DBUS_TYPE_BYTE_AS_STRING           "y"
#define DBUS_TYPE_BOOLEAN       ((int) 'b')
#define DBUS_TYPE_BOOLEAN_AS_STRING        "b"
#define DBUS_TYPE_INT16         ((int) 'n')
#define DBUS_TYPE_INT16_AS_STRING          "n"
#define DBUS_TYPE_UINT16        ((int) 'q')
#define DBUS_TYPE_UINT16_AS_STRING         "q"
#define DBUS_TYPE_INT32         ((int) 'i')
#define DBUS_TYPE_INT32_AS_STRING          "i"
#define DBUS_TYPE_UINT32        ((int) 'u')
#define DBUS_TYPE_UINT32_AS_STRING         "u"
#define DBUS_TYPE_INT64         ((int) 'x')
#define DBUS_TYPE_INT64_AS_STRING          "x"
#define DBUS_TYPE_UINT64        ((int) 't')
#define DBUS_TYPE_UINT64_AS_STRING         "t"

#define DBUS_TYPE_DOUBLE        ((int) 'd')
#define DBUS_TYPE_DOUBLE_AS_STRING         "d"
#define DBUS_TYPE_STRING        ((int) 's')
#define DBUS_TYPE_STRING_AS_STRING         "s"
#define DBUS_TYPE_OBJECT_PATH   ((int) 'o')
#define DBUS_TYPE_OBJECT_PATH_AS_STRING    "o"
#define DBUS_TYPE_SIGNATURE     ((int) 'g')
#define DBUS_TYPE_SIGNATURE_AS_STRING      "g"

/* Compound types */
#define DBUS_TYPE_ARRAY         ((int) 'a')
#define DBUS_TYPE_ARRAY_AS_STRING          "a"
#define DBUS_TYPE_VARIANT       ((int) 'v')
#define DBUS_TYPE_VARIANT_AS_STRING        "v"

/* STRUCT and DICT_ENTRY are sort of special since their codes can't
 * appear in a type string, instead
 * DBUS_STRUCT_BEGIN_CHAR/DBUS_DICT_ENTRY_BEGIN_CHAR have to appear
 */
#define DBUS_TYPE_STRUCT        ((int) 'r')
#define DBUS_TYPE_STRUCT_AS_STRING         "r"
#define DBUS_TYPE_DICT_ENTRY    ((int) 'e')
#define DBUS_TYPE_DICT_ENTRY_AS_STRING     "e"

/* Does not count INVALID */
#define DBUS_NUMBER_OF_TYPES    (16)

/* characters other than typecodes that appear in type signatures */
#define DBUS_STRUCT_BEGIN_CHAR   ((int) '(')
#define DBUS_STRUCT_BEGIN_CHAR_AS_STRING   "("
#define DBUS_STRUCT_END_CHAR     ((int) ')')
#define DBUS_STRUCT_END_CHAR_AS_STRING     ")"
#define DBUS_DICT_ENTRY_BEGIN_CHAR   ((int) '{')
#define DBUS_DICT_ENTRY_BEGIN_CHAR_AS_STRING   "{"
#define DBUS_DICT_ENTRY_END_CHAR     ((int) '}')
#define DBUS_DICT_ENTRY_END_CHAR_AS_STRING     "}"

/* Max length in bytes of a bus name, interface, or member (not object
 * path, paths are unlimited). This is limited because lots of stuff
 * is O(n) in this number, plus it would be obnoxious to type in a
 * paragraph-long method name so most likely something like that would
 * be an exploit.
 */
#define DBUS_MAXIMUM_NAME_LENGTH 255

/* This one is 255 so it fits in a byte */
#define DBUS_MAXIMUM_SIGNATURE_LENGTH 255

/* Max length of a match rule string; to keep people from hosing the
 * daemon with some huge rule
 */
#define DBUS_MAXIMUM_MATCH_RULE_LENGTH 1024

/* Max length of a marshaled array in bytes (64M, 2^26) We use signed
 * int for lengths so must be INT_MAX or less.  We need something a
 * bit smaller than INT_MAX because the array is inside a message with
 * header info, etc.  so an INT_MAX array wouldn't allow the message
 * overhead.  The 64M number is an attempt at a larger number than
 * we'd reasonably ever use, but small enough that your bus would chew
 * through it fairly quickly without locking up forever. If you have
 * data that's likely to be larger than this, you should probably be
 * sending it in multiple incremental messages anyhow.
 */
#define DBUS_MAXIMUM_ARRAY_LENGTH (67108864)
/* Number of bits you need in an unsigned to store the max array size */
#define DBUS_MAXIMUM_ARRAY_LENGTH_BITS 26

/* The maximum total message size including header and body; similar
 * rationale to max array size.
 */
#define DBUS_MAXIMUM_MESSAGE_LENGTH (DBUS_MAXIMUM_ARRAY_LENGTH * 2)
/* Number of bits you need in an unsigned to store the max message size */
#define DBUS_MAXIMUM_MESSAGE_LENGTH_BITS 27

/* Depth of recursion in the type tree. This is automatically limited
 * to DBUS_MAXIMUM_SIGNATURE_LENGTH since you could only have an array
 * of array of array of ... that fit in the max signature.  But that's
 * probably a bit too large.
 */
#define DBUS_MAXIMUM_TYPE_RECURSION_DEPTH 32

/* Types of message */
#define DBUS_MESSAGE_TYPE_INVALID       0
#define DBUS_MESSAGE_TYPE_METHOD_CALL   1
#define DBUS_MESSAGE_TYPE_METHOD_RETURN 2
#define DBUS_MESSAGE_TYPE_ERROR         3
#define DBUS_MESSAGE_TYPE_SIGNAL        4

/* Header flags */
#define DBUS_HEADER_FLAG_NO_REPLY_EXPECTED 0x1
#define DBUS_HEADER_FLAG_NO_AUTO_START     0x2

/* Header fields */
#define DBUS_HEADER_FIELD_INVALID        0
#define DBUS_HEADER_FIELD_PATH           1
#define DBUS_HEADER_FIELD_INTERFACE      2
#define DBUS_HEADER_FIELD_MEMBER         3
#define DBUS_HEADER_FIELD_ERROR_NAME     4
#define DBUS_HEADER_FIELD_REPLY_SERIAL   5
#define DBUS_HEADER_FIELD_DESTINATION    6
#define DBUS_HEADER_FIELD_SENDER         7
#define DBUS_HEADER_FIELD_SIGNATURE      8

#define DBUS_HEADER_FIELD_LAST DBUS_HEADER_FIELD_SIGNATURE

/* Header format is defined as a signature:
 *   byte                            byte order
 *   byte                            message type ID
 *   byte                            flags
 *   byte                            protocol version
 *   uint32                          body length
 *   uint32                          serial
 *   array of struct (byte,variant)  (field name, value)
 *
 * The length of the header can be computed as the
 * fixed size of the initial data, plus the length of
 * the array at the end, plus padding to an 8-boundary.
 */
#define DBUS_HEADER_SIGNATURE                   \
     DBUS_TYPE_BYTE_AS_STRING                   \
     DBUS_TYPE_BYTE_AS_STRING                   \
     DBUS_TYPE_BYTE_AS_STRING                   \
     DBUS_TYPE_BYTE_AS_STRING                   \
     DBUS_TYPE_UINT32_AS_STRING                 \
     DBUS_TYPE_UINT32_AS_STRING                 \
     DBUS_TYPE_ARRAY_AS_STRING                  \
     DBUS_STRUCT_BEGIN_CHAR_AS_STRING           \
     DBUS_TYPE_BYTE_AS_STRING                   \
     DBUS_TYPE_VARIANT_AS_STRING                \
     DBUS_STRUCT_END_CHAR_AS_STRING


/**
 * The smallest header size that can occur.  (It won't be valid due to
 * missing required header fields.) This is 4 bytes, two uint32, an
 * array length. This isn't any kind of resource limit, just the
 * necessary/logical outcome of the header signature.
 */
#define DBUS_MINIMUM_HEADER_SIZE 16

/* Services */
#define DBUS_SERVICE_ORG_FREEDESKTOP_DBUS      "org.freedesktop.DBus"

/* Paths */
#define DBUS_PATH_ORG_FREEDESKTOP_DBUS  "/org/freedesktop/DBus"
#define DBUS_PATH_ORG_FREEDESKTOP_LOCAL "/org/freedesktop/Local"

/* Interfaces, these #define don't do much other than
 * catch typos at compile time
 */
#define DBUS_INTERFACE_ORG_FREEDESKTOP_DBUS           "org.freedesktop.DBus"
#define DBUS_INTERFACE_ORG_FREEDESKTOP_INTROSPECTABLE "org.freedesktop.Introspectable"
#define DBUS_INTERFACE_ORG_FREEDESKTOP_PROPERTIES     "org.freedesktop.Properties"
#define DBUS_INTERFACE_ORG_FREEDESKTOP_PEER           "org.freedesktop.Peer"

/* This is a special interface whose methods can only be invoked
 * by the local implementation (messages from remote apps aren't
 * allowed to specify this interface).
 */
#define DBUS_INTERFACE_ORG_FREEDESKTOP_LOCAL "org.freedesktop.Local"

/* Owner flags */
#define DBUS_NAME_FLAG_PROHIBIT_REPLACEMENT 0x1
#define DBUS_NAME_FLAG_REPLACE_EXISTING     0x2

/* Replies to request for a name */
#define DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER  1
#define DBUS_REQUEST_NAME_REPLY_IN_QUEUE       2
#define DBUS_REQUEST_NAME_REPLY_EXISTS         3
#define DBUS_REQUEST_NAME_REPLY_ALREADY_OWNER  4

/* Replies to service starts */
#define DBUS_START_REPLY_SUCCESS         1
#define DBUS_START_REPLY_ALREADY_RUNNING 2

/* Errors */
/* WARNING these get autoconverted to an enum in dbus-glib.h. Thus,
 * if you change the order it breaks the ABI. Keep them in order.
 * Also, don't change the formatting since that will break the sed
 * script.
 */
#define DBUS_ERROR_FAILED                     "org.freedesktop.DBus.Error.Failed"
#define DBUS_ERROR_NO_MEMORY                  "org.freedesktop.DBus.Error.NoMemory"
#define DBUS_ERROR_SERVICE_UNKNOWN            "org.freedesktop.DBus.Error.ServiceUnknown"
#define DBUS_ERROR_NAME_HAS_NO_OWNER          "org.freedesktop.DBus.Error.NameHasNoOwner"
#define DBUS_ERROR_NO_REPLY                   "org.freedesktop.DBus.Error.NoReply"
#define DBUS_ERROR_IO_ERROR                   "org.freedesktop.DBus.Error.IOError"
#define DBUS_ERROR_BAD_ADDRESS                "org.freedesktop.DBus.Error.BadAddress"
#define DBUS_ERROR_NOT_SUPPORTED              "org.freedesktop.DBus.Error.NotSupported"
#define DBUS_ERROR_LIMITS_EXCEEDED            "org.freedesktop.DBus.Error.LimitsExceeded"
#define DBUS_ERROR_ACCESS_DENIED              "org.freedesktop.DBus.Error.AccessDenied"
#define DBUS_ERROR_AUTH_FAILED                "org.freedesktop.DBus.Error.AuthFailed"
#define DBUS_ERROR_NO_SERVER                  "org.freedesktop.DBus.Error.NoServer"
#define DBUS_ERROR_TIMEOUT                    "org.freedesktop.DBus.Error.Timeout"
#define DBUS_ERROR_NO_NETWORK                 "org.freedesktop.DBus.Error.NoNetwork"
#define DBUS_ERROR_ADDRESS_IN_USE             "org.freedesktop.DBus.Error.AddressInUse"
#define DBUS_ERROR_DISCONNECTED               "org.freedesktop.DBus.Error.Disconnected"
#define DBUS_ERROR_INVALID_ARGS               "org.freedesktop.DBus.Error.InvalidArgs"
#define DBUS_ERROR_FILE_NOT_FOUND             "org.freedesktop.DBus.Error.FileNotFound"
#define DBUS_ERROR_UNKNOWN_METHOD             "org.freedesktop.DBus.Error.UnknownMethod"
#define DBUS_ERROR_TIMED_OUT                  "org.freedesktop.DBus.Error.TimedOut"
#define DBUS_ERROR_MATCH_RULE_NOT_FOUND       "org.freedesktop.DBus.Error.MatchRuleNotFound"
#define DBUS_ERROR_MATCH_RULE_INVALID         "org.freedesktop.DBus.Error.MatchRuleInvalid"
#define DBUS_ERROR_SPAWN_EXEC_FAILED          "org.freedesktop.DBus.Error.Spawn.ExecFailed"
#define DBUS_ERROR_SPAWN_FORK_FAILED          "org.freedesktop.DBus.Error.Spawn.ForkFailed"
#define DBUS_ERROR_SPAWN_CHILD_EXITED         "org.freedesktop.DBus.Error.Spawn.ChildExited"
#define DBUS_ERROR_SPAWN_CHILD_SIGNALED       "org.freedesktop.DBus.Error.Spawn.ChildSignaled"
#define DBUS_ERROR_SPAWN_FAILED               "org.freedesktop.DBus.Error.Spawn.Failed"
#define DBUS_ERROR_UNIX_PROCESS_ID_UNKNOWN    "org.freedesktop.DBus.Error.UnixProcessIdUnknown"

#define DBUS_INTROSPECT_1_0_XML_NAMESPACE         "http://www.freedesktop.org/standards/dbus"
#define DBUS_INTROSPECT_1_0_XML_PUBLIC_IDENTIFIER "-//freedesktop//DTD D-BUS Object Introspection 1.0//EN"
#define DBUS_INTROSPECT_1_0_XML_SYSTEM_IDENTIFIER "http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd"
#define DBUS_INTROSPECT_1_0_XML_DOCTYPE_DECL_NODE "<!DOCTYPE node PUBLIC \""DBUS_INTROSPECT_1_0_XML_PUBLIC_IDENTIFIER"\"\n\""DBUS_INTROSPECT_1_0_XML_SYSTEM_IDENTIFIER"\">\n"


#ifdef __cplusplus
}
#endif

#endif /* DBUS_PROTOCOL_H */