| 1 | /****************************************************************************
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| 2 | **
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| 3 | ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
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| 4 | ** All rights reserved.
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| 5 | ** Contact: Nokia Corporation ([email protected])
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| 6 | **
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| 7 | ** This file is part of the QtDBus module of the Qt Toolkit.
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| 8 | **
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$
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| 10 | ** Commercial Usage
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the
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| 13 | ** Software or, alternatively, in accordance with the terms contained in
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| 14 | ** a written agreement between you and Nokia.
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| 15 | **
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| 16 | ** GNU Lesser General Public License Usage
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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| 18 | ** General Public License version 2.1 as published by the Free Software
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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| 20 | ** packaging of this file. Please review the following information to
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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| 23 | **
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional
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| 25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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| 27 | **
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| 28 | ** GNU General Public License Usage
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| 29 | ** Alternatively, this file may be used under the terms of the GNU
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| 30 | ** General Public License version 3.0 as published by the Free Software
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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| 32 | ** packaging of this file. Please review the following information to
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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| 35 | **
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| 36 | ** If you have questions regarding the use of this file, please contact
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| 37 | ** Nokia at [email protected].
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| 38 | ** $QT_END_LICENSE$
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| 39 | **
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| 40 | ****************************************************************************/
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| 41 |
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| 42 | #include "qdbuserror.h"
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| 43 |
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| 44 | #include <qdebug.h>
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| 45 | #include <qvarlengtharray.h>
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| 46 |
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| 47 | #include "qdbus_symbols_p.h"
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| 48 | #include "qdbusmessage.h"
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| 49 | #include "qdbusmessage_p.h"
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| 50 |
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| 51 | #ifndef QT_NO_DBUS
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| 52 |
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| 53 | QT_BEGIN_NAMESPACE
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| 54 |
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| 55 | /*
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| 56 | * Use the following Perl script to generate the error string index list:
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| 57 | ===== PERL SCRIPT ====
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| 58 | print "static const char errorMessages_string[] =\n";
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| 59 | $counter = 0;
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| 60 | $i = 0;
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| 61 | while (<STDIN>) {
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| 62 | chomp;
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| 63 | print " \"$_\\0\"\n";
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| 64 | $sizes[$i++] = $counter;
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| 65 | $counter += 1 + length $_;
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| 66 | }
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| 67 | print " \"\\0\";\n\nstatic const int errorMessages_indices[] = {\n ";
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| 68 | for ($j = 0; $j < $i; ++$j) {
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| 69 | printf "$sizes[$j], ";
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| 70 | }
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| 71 | print "0\n};\n";
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| 72 | ===== PERL SCRIPT ====
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| 73 |
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| 74 | * The input data is as follows:
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| 75 | other
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| 76 | org.freedesktop.DBus.Error.Failed
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| 77 | org.freedesktop.DBus.Error.NoMemory
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| 78 | org.freedesktop.DBus.Error.ServiceUnknown
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| 79 | org.freedesktop.DBus.Error.NoReply
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| 80 | org.freedesktop.DBus.Error.BadAddress
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| 81 | org.freedesktop.DBus.Error.NotSupported
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| 82 | org.freedesktop.DBus.Error.LimitsExceeded
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| 83 | org.freedesktop.DBus.Error.AccessDenied
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| 84 | org.freedesktop.DBus.Error.NoServer
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| 85 | org.freedesktop.DBus.Error.Timeout
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| 86 | org.freedesktop.DBus.Error.NoNetwork
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| 87 | org.freedesktop.DBus.Error.AddressInUse
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| 88 | org.freedesktop.DBus.Error.Disconnected
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| 89 | org.freedesktop.DBus.Error.InvalidArgs
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| 90 | org.freedesktop.DBus.Error.UnknownMethod
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| 91 | org.freedesktop.DBus.Error.TimedOut
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| 92 | org.freedesktop.DBus.Error.InvalidSignature
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| 93 | org.freedesktop.DBus.Error.UnknownInterface
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| 94 | com.trolltech.QtDBus.Error.InternalError
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| 95 | org.freedesktop.DBus.Error.UnknownObject
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| 96 | com.trolltech.QtDBus.Error.InvalidService
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| 97 | com.trolltech.QtDBus.Error.InvalidObjectPath
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| 98 | com.trolltech.QtDBus.Error.InvalidInterface
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| 99 | com.trolltech.QtDBus.Error.InvalidMember
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| 100 | */
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| 101 |
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| 102 | // in the same order as KnownErrors!
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| 103 | static const char errorMessages_string[] =
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| 104 | "other\0"
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| 105 | "org.freedesktop.DBus.Error.Failed\0"
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| 106 | "org.freedesktop.DBus.Error.NoMemory\0"
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| 107 | "org.freedesktop.DBus.Error.ServiceUnknown\0"
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| 108 | "org.freedesktop.DBus.Error.NoReply\0"
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| 109 | "org.freedesktop.DBus.Error.BadAddress\0"
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| 110 | "org.freedesktop.DBus.Error.NotSupported\0"
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| 111 | "org.freedesktop.DBus.Error.LimitsExceeded\0"
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| 112 | "org.freedesktop.DBus.Error.AccessDenied\0"
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| 113 | "org.freedesktop.DBus.Error.NoServer\0"
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| 114 | "org.freedesktop.DBus.Error.Timeout\0"
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| 115 | "org.freedesktop.DBus.Error.NoNetwork\0"
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| 116 | "org.freedesktop.DBus.Error.AddressInUse\0"
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| 117 | "org.freedesktop.DBus.Error.Disconnected\0"
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| 118 | "org.freedesktop.DBus.Error.InvalidArgs\0"
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| 119 | "org.freedesktop.DBus.Error.UnknownMethod\0"
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| 120 | "org.freedesktop.DBus.Error.TimedOut\0"
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| 121 | "org.freedesktop.DBus.Error.InvalidSignature\0"
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| 122 | "org.freedesktop.DBus.Error.UnknownInterface\0"
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| 123 | "com.trolltech.QtDBus.Error.InternalError\0"
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| 124 | "org.freedesktop.DBus.Error.UnknownObject\0"
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| 125 | "com.trolltech.QtDBus.Error.InvalidService\0"
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| 126 | "com.trolltech.QtDBus.Error.InvalidObjectPath\0"
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| 127 | "com.trolltech.QtDBus.Error.InvalidInterface\0"
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| 128 | "com.trolltech.QtDBus.Error.InvalidMember\0"
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| 129 | "\0";
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| 130 |
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| 131 | static const int errorMessages_indices[] = {
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| 132 | 0, 6, 40, 76, 118, 153, 191, 231,
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| 133 | 273, 313, 349, 384, 421, 461, 501, 540,
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| 134 | 581, 617, 661, 705, 746, 787, 829, 874,
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| 135 | 918, 0
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| 136 | };
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| 137 |
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| 138 | static const int errorMessages_count = sizeof errorMessages_indices /
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| 139 | sizeof errorMessages_indices[0];
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| 140 |
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| 141 | static inline const char *get(QDBusError::ErrorType code)
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| 142 | {
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| 143 | int intcode = qBound(0, int(code) - int(QDBusError::Other), errorMessages_count);
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| 144 | return errorMessages_string + errorMessages_indices[intcode];
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| 145 | }
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| 146 |
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| 147 | static inline QDBusError::ErrorType get(const char *name)
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| 148 | {
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| 149 | if (!name || !*name)
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| 150 | return QDBusError::NoError;
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| 151 | for (int i = 0; i < errorMessages_count; ++i)
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| 152 | if (strcmp(name, errorMessages_string + errorMessages_indices[i]) == 0)
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| 153 | return QDBusError::ErrorType(i + int(QDBusError::Other));
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| 154 | return QDBusError::Other;
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| 155 | }
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| 156 |
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| 157 | /*!
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| 158 | \class QDBusError
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| 159 | \inmodule QtDBus
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| 160 | \since 4.2
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| 161 |
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| 162 | \brief The QDBusError class represents an error received from the
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| 163 | D-Bus bus or from remote applications found in the bus.
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| 164 |
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| 165 | When dealing with the D-Bus bus service or with remote
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| 166 | applications over D-Bus, a number of error conditions can
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| 167 | happen. This error conditions are sometimes signalled by a
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| 168 | returned error value or by a QDBusError.
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| 169 |
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| 170 | C++ and Java exceptions are a valid analogy for D-Bus errors:
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| 171 | instead of returning normally with a return value, remote
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| 172 | applications and the bus may decide to throw an error
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| 173 | condition. However, the QtDBus implementation does not use the C++
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| 174 | exception-throwing mechanism, so you will receive QDBusErrors in
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| 175 | the return reply (see QDBusReply::error()).
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| 176 |
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| 177 | QDBusError objects are used to inspect the error name and message
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| 178 | as received from the bus and remote applications. You should not
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| 179 | create such objects yourself to signal error conditions when
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| 180 | called from D-Bus: instead, use QDBusMessage::createError() and
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| 181 | QDBusConnection::send().
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| 182 |
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| 183 | \sa QDBusConnection::send(), QDBusMessage, QDBusReply
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| 184 | */
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| 185 |
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| 186 | /*!
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| 187 | \enum QDBusError::ErrorType
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| 188 |
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| 189 | In order to facilitate verification of the most common D-Bus errors generated by the D-Bus
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| 190 | implementation and by the bus daemon itself, QDBusError can be compared to a set of pre-defined
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| 191 | values:
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| 192 |
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| 193 | \value NoError QDBusError is invalid (i.e., the call succeeded)
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| 194 | \value Other QDBusError contains an error that is one of the well-known ones
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| 195 | \value Failed The call failed (\c org.freedesktop.DBus.Error.Failed)
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| 196 | \value NoMemory Out of memory (\c org.freedesktop.DBus.Error.NoMemory)
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| 197 | \value ServiceUnknown The called service is not known
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| 198 | (\c org.freedesktop.DBus.Error.ServiceUnknown)
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| 199 | \value NoReply The called method did not reply within the specified timeout
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| 200 | (\c org.freedesktop.DBus.Error.NoReply)
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| 201 | \value BadAddress The address given is not valid
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| 202 | (\c org.freedesktop.DBus.Error.BadAddress)
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| 203 | \value NotSupported The call/operation is not supported
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| 204 | (\c org.freedesktop.DBus.Error.NotSupported)
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| 205 | \value LimitsExceeded The limits allocated to this process/call/connection exceeded the
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| 206 | pre-defined values (\c org.freedesktop.DBus.Error.LimitsExceeded)
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| 207 | \value AccessDenied The call/operation tried to access a resource it isn't allowed to
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| 208 | (\c org.freedesktop.DBus.Error.AccessDenied)
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| 209 | \value NoServer \e {Documentation doesn't say what this is for}
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| 210 | (\c org.freedesktop.DBus.Error.NoServer)
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| 211 | \value Timeout \e {Documentation doesn't say what this is for or how it's used}
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| 212 | (\c org.freedesktop.DBus.Error.Timeout)
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| 213 | \value NoNetwork \e {Documentation doesn't say what this is for}
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| 214 | (\c org.freedesktop.DBus.Error.NoNetwork)
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| 215 | \value AddressInUse QDBusServer tried to bind to an address that is already in use
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| 216 | (\c org.freedesktop.DBus.Error.AddressInUse)
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| 217 | \value Disconnected The call/process/message was sent after QDBusConnection disconnected
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| 218 | (\c org.freedesktop.DBus.Error.Disconnected)
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| 219 | \value InvalidArgs The arguments passed to this call/operation are not valid
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| 220 | (\c org.freedesktop.DBus.Error.InvalidArgs)
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| 221 | \value UnknownMethod The method called was not found in this object/interface with the
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| 222 | given parameters (\c org.freedesktop.DBus.Error.UnknownMethod)
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| 223 | \value TimedOut \e {Documentation doesn't say...}
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| 224 | (\c org.freedesktop.DBus.Error.TimedOut)
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| 225 | \value InvalidSignature The type signature is not valid or compatible
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| 226 | (\c org.freedesktop.DBus.Error.InvalidSignature)
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| 227 | \value UnknownInterface The interface is not known
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| 228 | \value InternalError An internal error occurred
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| 229 | (\c com.trolltech.QtDBus.Error.InternalError)
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| 230 |
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| 231 | \value InvalidObjectPath The object path provided is invalid.
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| 232 |
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| 233 | \value InvalidService The service requested is invalid.
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| 234 |
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| 235 | \value InvalidMember The member is invalid.
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| 236 |
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| 237 | \value InvalidInterface The interface is invalid.
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| 238 |
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| 239 | \value UnknownObject The remote object could not be found.
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| 240 | */
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| 241 |
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| 242 | /*!
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| 243 | \internal
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| 244 | Constructs a QDBusError from a DBusError structure.
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| 245 | */
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| 246 | QDBusError::QDBusError(const DBusError *error)
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| 247 | : code(NoError)
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| 248 | {
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| 249 | if (!error || !q_dbus_error_is_set(error))
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| 250 | return;
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| 251 |
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| 252 | code = ::get(error->name);
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| 253 | msg = QString::fromUtf8(error->message);
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| 254 | nm = QString::fromUtf8(error->name);
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| 255 | }
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| 256 |
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| 257 | /*!
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| 258 | \internal
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| 259 | Constructs a QDBusError from a QDBusMessage.
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| 260 | */
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| 261 | QDBusError::QDBusError(const QDBusMessage &qdmsg)
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| 262 | : code(NoError)
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| 263 | {
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| 264 | if (qdmsg.type() != QDBusMessage::ErrorMessage)
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| 265 | return;
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| 266 |
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| 267 | code = ::get(qdmsg.errorName().toUtf8().constData());
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| 268 | nm = qdmsg.errorName();
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| 269 | msg = qdmsg.errorMessage();
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| 270 | }
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| 271 |
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| 272 | /*!
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| 273 | \internal
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| 274 | Constructs a QDBusError from a well-known error code
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| 275 | */
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| 276 | QDBusError::QDBusError(ErrorType error, const QString &mess)
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| 277 | : code(error)
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| 278 | {
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| 279 | nm = QLatin1String(::get(error));
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| 280 | msg = mess;
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| 281 | }
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| 282 |
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| 283 | /*!
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| 284 | \internal
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| 285 | Constructs a QDBusError from another QDBusError object
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| 286 | */
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| 287 | QDBusError::QDBusError(const QDBusError &other)
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| 288 | : code(other.code), msg(other.msg), nm(other.nm)
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| 289 | {
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| 290 | }
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| 291 |
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| 292 | /*!
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| 293 | \internal
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| 294 | Assignment operator
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| 295 | */
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| 296 |
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| 297 | QDBusError &QDBusError::operator=(const QDBusError &other)
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| 298 | {
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| 299 | code = other.code;
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| 300 | msg = other.msg;
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| 301 | nm = other.nm;
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| 302 | return *this;
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| 303 | }
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| 304 |
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| 305 | /*!
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| 306 | Returns this error's ErrorType.
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| 307 |
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| 308 | \sa ErrorType
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| 309 | */
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| 310 |
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| 311 | QDBusError::ErrorType QDBusError::type() const
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| 312 | {
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| 313 | return code;
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| 314 | }
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| 315 |
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| 316 | /*!
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| 317 | Returns this error's name. Error names are similar to D-Bus Interface names, like
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| 318 | \c org.freedesktop.DBus.InvalidArgs.
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| 319 |
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| 320 | \sa type()
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| 321 | */
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| 322 |
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| 323 | QString QDBusError::name() const
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| 324 | {
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| 325 | return nm;
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| 326 | }
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| 327 |
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| 328 | /*!
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| 329 | Returns the message that the callee associated with this error. Error messages are
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| 330 | implementation defined and usually contain a human-readable error code, though this does not
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| 331 | mean it is suitable for your end-users.
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| 332 | */
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| 333 |
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| 334 | QString QDBusError::message() const
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| 335 | {
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| 336 | return msg;
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| 337 | }
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| 338 |
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| 339 | /*!
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| 340 | Returns true if this is a valid error condition (i.e., if there was an error),
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| 341 | otherwise false.
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| 342 | */
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| 343 |
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| 344 | bool QDBusError::isValid() const
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| 345 | {
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| 346 | return (code != NoError);
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| 347 | }
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| 348 |
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| 349 | /*!
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| 350 | \since 4.3
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| 351 | Returns the error name associated with error condition \a error.
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| 352 | */
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| 353 | QString QDBusError::errorString(ErrorType error)
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| 354 | {
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| 355 | return QLatin1String(::get(error));
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| 356 | }
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| 357 |
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| 358 | #ifndef QT_NO_DEBUG_STREAM
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| 359 | QDebug operator<<(QDebug dbg, const QDBusError &msg)
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| 360 | {
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| 361 | dbg.nospace() << "QDBusError(" << msg.name() << ", " << msg.message() << ')';
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| 362 | return dbg.space();
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| 363 | }
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| 364 | #endif
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| 365 |
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| 366 | QT_END_NAMESPACE
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| 367 |
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| 368 | #endif // QT_NO_DBUS
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