1 /* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
2 /* dbus-message-private.h header shared between dbus-message.c and dbus-message-util.c
4 * Copyright (C) 2005 Red Hat Inc.
6 * Licensed under the Academic Free License version 2.1
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #ifndef DBUS_MESSAGE_PRIVATE_H
24 #define DBUS_MESSAGE_PRIVATE_H
26 #include <dbus/dbus-message.h>
27 #include <dbus/dbus-message-internal.h>
28 #include <dbus/dbus-string.h>
29 #include <dbus/dbus-dataslot.h>
30 #include <dbus/dbus-marshal-header.h>
35 * @addtogroup DBusMessageInternals
40 * @typedef DBusMessageLoader
42 * The DBusMessageLoader object encapsulates the process of converting
43 * a byte stream into a series of DBusMessage. It buffers the incoming
44 * bytes as efficiently as possible, and generates a queue of
45 * messages. DBusMessageLoader is typically used as part of a
46 * DBusTransport implementation. The DBusTransport then hands off
47 * the loaded messages to a DBusConnection, making the messages
48 * visible to the application.
50 * @todo write tests for break-loader that a) randomly delete header
51 * fields and b) set string fields to zero-length and other funky
57 * Implementation details of DBusMessageLoader.
58 * All members are private.
60 struct DBusMessageLoader
62 int refcount; /**< Reference count. */
64 DBusString data; /**< Buffered data */
66 DBusList *messages; /**< Complete messages. */
68 long max_message_size; /**< Maximum size of a message */
69 long max_message_unix_fds; /**< Maximum unix fds in a message */
71 DBusValidity corruption_reason; /**< why we were corrupted */
73 unsigned int corrupted : 1; /**< We got broken data, and are no longer working */
75 unsigned int buffer_outstanding : 1; /**< Someone is using the buffer to read */
77 #ifdef HAVE_UNIX_FD_PASSING
78 unsigned int unix_fds_outstanding : 1; /**< Someone is using the unix fd array to read */
80 int *unix_fds; /**< File descriptors that have been read from the transport but not yet been handed to any message. Array will be allocated at first use. */
81 unsigned n_unix_fds_allocated; /**< Number of file descriptors this array has space for */
82 unsigned n_unix_fds; /**< Number of valid file descriptors in array */
87 /** How many bits are in the changed_stamp used to validate iterators */
88 #define CHANGED_STAMP_BITS 21
91 * @brief Internals of DBusMessage
93 * Object representing a message received from or to be sent to
94 * another application. This is an opaque object, all members
99 DBusAtomic refcount; /**< Reference count */
101 DBusHeader header; /**< Header network data and associated cache */
103 DBusString body; /**< Body network data. */
105 char byte_order; /**< Message byte order. */
107 unsigned int locked : 1; /**< Message being sent, no modifications allowed. */
109 #ifndef DBUS_DISABLE_CHECKS
110 unsigned int in_cache : 1; /**< Has been "freed" since it's in the cache (this is a debug feature) */
113 DBusList *counters; /**< 0-N DBusCounter used to track message size/unix fds. */
114 long size_counter_delta; /**< Size we incremented the size counters by. */
116 dbus_uint32_t changed_stamp : CHANGED_STAMP_BITS; /**< Incremented when iterators are invalidated. */
118 DBusDataSlotList slot_list; /**< Data stored by allocated integer ID */
120 #ifndef DBUS_DISABLE_CHECKS
121 int generation; /**< _dbus_current_generation when message was created */
124 #ifdef HAVE_UNIX_FD_PASSING
126 /**< Unix file descriptors associated with this message. These are
127 closed when the message is destroyed, hence make sure to dup()
128 them when adding or removing them here. */
129 unsigned n_unix_fds; /**< Number of valid fds in the array */
130 unsigned n_unix_fds_allocated; /**< Allocated size of the array */
132 long unix_fd_counter_delta; /**< Size we incremented the unix fd counter by */
136 dbus_bool_t _dbus_message_iter_get_args_valist (DBusMessageIter *iter,
142 void _dbus_check_fdleaks(void);
148 #endif /* DBUS_MESSAGE_H */