summaryrefslogtreecommitdiffstats
path: root/src/dbus/qdbusconnection_p.h
blob: ed29e4ed341bd3b2c7c715f0a842d73a0cbd2c7f (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
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtDBus module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

//
//  W A R N I N G
//  -------------
//
// This file is not part of the public API.  This header file may
// change from version to version without notice, or even be
// removed.
//
// We mean it.
//
//

#ifndef QDBUSCONNECTION_P_H
#define QDBUSCONNECTION_P_H

#include <qdbuserror.h>
#include <qdbusconnection.h>

#include <QtCore/qatomic.h>
#include <QtCore/qhash.h>
#include <QtCore/qmutex.h>
#include <QtCore/qobject.h>
#include <QtCore/qpointer.h>
#include <QtCore/qreadwritelock.h>
#include <QtCore/qstringlist.h>
#include <QtCore/qvarlengtharray.h>
#include <QtCore/qvector.h>

#include <qdbus_symbols_p.h>

#include <qdbusmessage.h>

QT_BEGIN_NAMESPACE

class QDBusMessage;
class QSocketNotifier;
class QTimerEvent;
class QDBusObjectPrivate;
class QDBusCallDeliveryEvent;
class QDBusActivateObjectEvent;
class QMetaMethod;
class QDBusInterfacePrivate;
struct QDBusMetaObject;
class QDBusAbstractInterface;
class QDBusConnectionInterface;
class QDBusPendingCallPrivate;

class QDBusErrorInternal
{
    mutable DBusError error;
    Q_DISABLE_COPY(QDBusErrorInternal)
public:
    inline QDBusErrorInternal() { q_dbus_error_init(&error); }
    inline ~QDBusErrorInternal() { q_dbus_error_free(&error); }
    inline bool operator !() const { return !q_dbus_error_is_set(&error); }
    inline operator DBusError *() { q_dbus_error_free(&error); return &error; }
    inline operator QDBusError() const { QDBusError err(&error); q_dbus_error_free(&error); return err; }
};

// QDBusConnectionPrivate holds the DBusConnection and
// can have many QDBusConnection objects referring to it

class QDBusConnectionPrivate: public QObject
{
    Q_OBJECT
public:
    // structs and enums
    enum ConnectionMode { InvalidMode, ServerMode, ClientMode, PeerMode }; // LocalMode

    struct Watcher
    {
        Watcher(): watch(0), read(0), write(0) {}
        DBusWatch *watch;
        QSocketNotifier *read;
        QSocketNotifier *write;
    };

    struct SignalHook
    {
        inline SignalHook() : obj(0), midx(-1) { }
        QString owner, service, path, signature;
        QObject* obj;
        int midx;
        QList<int> params;
        QByteArray matchRule;
    };

    struct ObjectTreeNode
    {
        typedef QVector<ObjectTreeNode> DataList;

        inline ObjectTreeNode() : obj(0), flags(0) { }
        inline ObjectTreeNode(const QString &n) // intentionally implicit
            : name(n), obj(0), flags(0) { }
        inline ~ObjectTreeNode() { }
        inline bool operator<(const QString &other) const
            { return name < other; }
        inline bool operator<(const QStringRef &other) const
            { return QStringRef(&name) < other; }

        QString name;
        QObject* obj;
        int flags;
        DataList children;
    };

public:
    // typedefs
    typedef QMultiHash<int, Watcher> WatcherHash;
    typedef QHash<int, DBusTimeout *> TimeoutHash;
    typedef QList<QPair<DBusTimeout *, int> > PendingTimeoutList;

    typedef QMultiHash<QString, SignalHook> SignalHookHash;
    typedef QHash<QString, QDBusMetaObject* > MetaObjectHash;
    typedef QHash<QByteArray, int> MatchRefCountHash;
    typedef QHash<QString, int> WatchedServicesHash;

public:
    // public methods are entry points from other objects
    explicit QDBusConnectionPrivate(QObject *parent = 0);
    ~QDBusConnectionPrivate();
    void deleteYourself();

    void setBusService(const QDBusConnection &connection);
    void setPeer(DBusConnection *connection, const QDBusErrorInternal &error);
    void setConnection(DBusConnection *connection, const QDBusErrorInternal &error);
    void setServer(DBusServer *server, const QDBusErrorInternal &error);
    void closeConnection();

    QString getNameOwner(const QString &service);

    int send(const QDBusMessage &message);
    QDBusMessage sendWithReply(const QDBusMessage &message, int mode, int timeout = -1);
    QDBusMessage sendWithReplyLocal(const QDBusMessage &message);
    QDBusPendingCallPrivate *sendWithReplyAsync(const QDBusMessage &message, int timeout = -1);
    int sendWithReplyAsync(const QDBusMessage &message, QObject *receiver,
                           const char *returnMethod, const char *errorMethod, int timeout = -1);
    bool connectSignal(const QString &service, const QString &owner, const QString &path, const QString& interface,
                       const QString &name, const QStringList &argumentMatch, const QString &signature,
                       QObject *receiver, const char *slot);
    void connectSignal(const QString &key, const SignalHook &hook);
    SignalHookHash::Iterator disconnectSignal(SignalHookHash::Iterator &it);
    bool disconnectSignal(const QString &service, const QString &path, const QString& interface,
                          const QString &name, const QStringList &argumentMatch, const QString &signature,
                          QObject *receiver, const char *slot);
    void registerObject(const ObjectTreeNode *node);
    void connectRelay(const QString &service, const QString &currentOwner,
                      const QString &path, const QString &interface,
                      QDBusAbstractInterface *receiver, const char *signal);
    void disconnectRelay(const QString &service, const QString &currentOwner,
                         const QString &path, const QString &interface,
                         QDBusAbstractInterface *receiver, const char *signal);

    bool handleMessage(const QDBusMessage &msg);
    void waitForFinished(QDBusPendingCallPrivate *pcall);

    QDBusMetaObject *findMetaObject(const QString &service, const QString &path,
                                    const QString &interface, QDBusError &error);

    void registerService(const QString &serviceName);
    void unregisterService(const QString &serviceName);

    void postEventToThread(int action, QObject *target, QEvent *event);

    inline void serverConnection(const QDBusConnection &connection)
        { emit newServerConnection(connection); }
    
private:
    void checkThread();
    bool handleError(const QDBusErrorInternal &error);

    void handleSignal(const QString &key, const QDBusMessage &msg);
    void handleSignal(const QDBusMessage &msg);
    void handleObjectCall(const QDBusMessage &message);

    void activateSignal(const SignalHook& hook, const QDBusMessage &msg);
    void activateObject(ObjectTreeNode &node, const QDBusMessage &msg, int pathStartPos);
    bool activateInternalFilters(const ObjectTreeNode &node, const QDBusMessage &msg);
    bool activateCall(QObject *object, int flags, const QDBusMessage &msg);

    void sendError(const QDBusMessage &msg, QDBusError::ErrorType code);
    void deliverCall(QObject *object, int flags, const QDBusMessage &msg,
                     const QList<int> &metaTypes, int slotIdx);

    bool isServiceRegisteredByThread(const QString &serviceName) const;

protected:
    void customEvent(QEvent *e);
    void timerEvent(QTimerEvent *e);

public slots:
    // public slots
    void doDispatch();
    void socketRead(int);
    void socketWrite(int);
    void objectDestroyed(QObject *o);
    void relaySignal(QObject *obj, const QMetaObject *, int signalId, const QVariantList &args);
    void _q_serviceOwnerChanged(const QString &name, const QString &oldOwner, const QString &newOwner);

signals:
    void serviceOwnerChanged(const QString &name, const QString &oldOwner, const QString &newOwner);
    void callWithCallbackFailed(const QDBusError &error, const QDBusMessage &message);
    void newServerConnection(const QDBusConnection &connection);

public:
    QAtomicInt ref;
    QString name;               // this connection's name
    QString baseService;        // this connection's base service

    ConnectionMode mode;

    // members accessed in unlocked mode (except for deletion)
    // connection and server provide their own locking mechanisms
    // busService doesn't have state to be changed
    DBusConnection *connection;
    DBusServer *server;
    QDBusConnectionInterface *busService;

    // watchers and timeouts are accessed from any thread
    // but the corresponding timer and QSocketNotifier must be handled
    // only in the object's thread
    QMutex watchAndTimeoutLock;
    WatcherHash watchers;
    TimeoutHash timeouts;
    PendingTimeoutList timeoutsPendingAdd;

    // members accessed through a lock
    QMutex dispatchLock;
    QReadWriteLock lock;
    QDBusError lastError;

    QStringList serviceNames;
    WatchedServicesHash watchedServiceNames;
    SignalHookHash signalHooks;
    MatchRefCountHash matchRefCounts;
    ObjectTreeNode rootNode;
    MetaObjectHash cachedMetaObjects;

    QMutex callDeliveryMutex;
    QDBusCallDeliveryEvent *callDeliveryState; // protected by the callDeliveryMutex mutex

public:
    // static methods
    static int findSlot(QObject *obj, const QByteArray &normalizedName, QList<int>& params);
    static bool prepareHook(QDBusConnectionPrivate::SignalHook &hook, QString &key,
                            const QString &service, const QString &owner,
                            const QString &path, const QString &interface, const QString &name,
                            const QStringList &argMatch,
                            QObject *receiver, const char *signal, int minMIdx,
                            bool buildSignature);
    static DBusHandlerResult messageFilter(DBusConnection *, DBusMessage *, void *);
    static QDBusCallDeliveryEvent *prepareReply(QDBusConnectionPrivate *target, QObject *object,
                                                int idx, const QList<int> &metaTypes,
                                                const QDBusMessage &msg);
    static void processFinishedCall(QDBusPendingCallPrivate *call);

    static QDBusConnectionPrivate *d(const QDBusConnection& q) { return q.d; }
    static QDBusConnection q(QDBusConnectionPrivate *connection) { return QDBusConnection(connection); }

    static void setSender(const QDBusConnectionPrivate *s);
    static void setConnection(const QString &name, QDBusConnectionPrivate *c);

    friend class QDBusActivateObjectEvent;
    friend class QDBusCallDeliveryEvent;
};

// in qdbusmisc.cpp
extern int qDBusParametersForMethod(const QMetaMethod &mm, QList<int>& metaTypes);
extern int qDBusNameToTypeId(const char *name);
extern bool qDBusCheckAsyncTag(const char *tag);
extern bool qDBusInterfaceInObject(QObject *obj, const QString &interface_name);
extern QString qDBusInterfaceFromMetaObject(const QMetaObject *mo);

// in qdbusinternalfilters.cpp
extern QString qDBusIntrospectObject(const QDBusConnectionPrivate::ObjectTreeNode &node);
extern QDBusMessage qDBusPropertyGet(const QDBusConnectionPrivate::ObjectTreeNode &node,
                                     const QDBusMessage &msg);
extern QDBusMessage qDBusPropertySet(const QDBusConnectionPrivate::ObjectTreeNode &node,
                                     const QDBusMessage &msg);
extern QDBusMessage qDBusPropertyGetAll(const QDBusConnectionPrivate::ObjectTreeNode &node,
                                        const QDBusMessage &msg);

QT_END_NAMESPACE

#endif