summaryrefslogtreecommitdiffstats
path: root/src/network/kernel/qhostinfo_p.h
blob: 035aa0126ae8a668e4ac8ea29a3ffa7af177368b (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
/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef QHOSTINFO_P_H
#define QHOSTINFO_P_H

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

#include "QtCore/qcoreapplication.h"
#include "private/qcoreapplication_p.h"
#include "QtNetwork/qhostinfo.h"
#include "QtCore/qmutex.h"
#include "QtCore/qwaitcondition.h"
#include "QtCore/qobject.h"
#include "QtCore/qpointer.h"
#include "QtCore/qthread.h"
#include "QtCore/qthreadpool.h"
#include "QtCore/qmutex.h"
#include "QtCore/qrunnable.h"
#include "QtCore/qlist.h"
#include "QtCore/qqueue.h"
#include <QElapsedTimer>
#include <QCache>

#include <QNetworkSession>
#include <QSharedPointer>

#ifdef Q_OS_SYMBIAN
// Symbian Headers
#include <es_sock.h>
#include <in_sock.h>
#endif


QT_BEGIN_NAMESPACE


class QHostInfoResult : public QObject
{
    Q_OBJECT
public Q_SLOTS:
    inline void emitResultsReady(const QHostInfo &info)
    {
        emit resultsReady(info);
    }

Q_SIGNALS:
    void resultsReady(const QHostInfo &info);
};

// needs to be QObject because fromName calls tr()
class QHostInfoAgent : public QObject
{
    Q_OBJECT
public:
    static QHostInfo fromName(const QString &hostName);
    static QHostInfo fromName(const QString &hostName, QSharedPointer<QNetworkSession> networkSession);

#ifdef Q_OS_SYMBIAN
    static int lookupHost(const QString &name, QObject *receiver, const char *member);
    static void abortHostLookup(int lookupId);
#endif
};

class QHostInfoPrivate
{
public:
    inline QHostInfoPrivate()
        : err(QHostInfo::NoError),
          errorStr(QLatin1String(QT_TRANSLATE_NOOP("QHostInfo", "Unknown error"))),
          lookupId(0)
    {
    }
#ifndef QT_NO_BEARERMANAGEMENT
    //not a public API yet
    static QHostInfo fromName(const QString &hostName, QSharedPointer<QNetworkSession> networkSession);
#endif

    QHostInfo::HostInfoError err;
    QString errorStr;
    QList<QHostAddress> addrs;
    QString hostName;
    int lookupId;
};

// These functions are outside of the QHostInfo class and strictly internal.
// Do NOT use them outside of QAbstractSocket.
QHostInfo Q_NETWORK_EXPORT qt_qhostinfo_lookup(const QString &name, QObject *receiver, const char *member, bool *valid, int *id);
void Q_AUTOTEST_EXPORT qt_qhostinfo_clear_cache();
void Q_AUTOTEST_EXPORT qt_qhostinfo_enable_cache(bool e);

class QHostInfoCache
{
public:
    QHostInfoCache();
    const int max_age; // seconds

    QHostInfo get(const QString &name, bool *valid);
    void put(const QString &name, const QHostInfo &info);
    void clear();

    bool isEnabled();
    void setEnabled(bool e);
private:
    bool enabled;
    struct QHostInfoCacheElement {
        QHostInfo info;
        QElapsedTimer age;
    };
    QCache<QString,QHostInfoCacheElement> cache;
    QMutex mutex;
};

// the following classes are used for the (normal) case: We use multiple threads to lookup DNS

class QHostInfoRunnable : public QRunnable
{
public:
    QHostInfoRunnable (QString hn, int i);
    void run();

    QString toBeLookedUp;
    int id;
    QHostInfoResult resultEmitter;
};


class QAbstractHostInfoLookupManager : public QObject
{
    Q_OBJECT

public:
    ~QAbstractHostInfoLookupManager() {}
    virtual void clear() = 0;

    QHostInfoCache cache;

protected:
     QAbstractHostInfoLookupManager() {}
     static QAbstractHostInfoLookupManager* globalInstance();

};

#ifndef Q_OS_SYMBIAN
class QHostInfoLookupManager : public QAbstractHostInfoLookupManager
{
    Q_OBJECT
public:
    QHostInfoLookupManager();
    ~QHostInfoLookupManager();

    void clear();
    void work();

    // called from QHostInfo
    void scheduleLookup(QHostInfoRunnable *r);
    void abortLookup(int id);

    // called from QHostInfoRunnable
    void lookupFinished(QHostInfoRunnable *r);
    bool wasAborted(int id);

    friend class QHostInfoRunnable;
protected:
    QList<QHostInfoRunnable*> currentLookups; // in progress
    QList<QHostInfoRunnable*> postponedLookups; // postponed because in progress for same host
    QQueue<QHostInfoRunnable*> scheduledLookups; // not yet started
    QList<QHostInfoRunnable*> finishedLookups; // recently finished
    QList<int> abortedLookups; // ids of aborted lookups

    QThreadPool threadPool;

    QMutex mutex;

    bool wasDeleted;

private slots:
    void waitForThreadPoolDone() { threadPool.waitForDone(); }
};

#else

class QSymbianHostResolver : public CActive
{
public:
    QSymbianHostResolver(const QString &hostName, int id, QSharedPointer<QNetworkSession> networkSession);
    ~QSymbianHostResolver();

    void requestHostLookup();
    void abortHostLookup();
    int id();

    void returnResults();

    QHostInfoResult resultEmitter;

private:
    void DoCancel();
    void RunL();
    void run();
    TInt RunError(TInt aError);

    void processNameResult();
    void nextNameResult();
    void processAddressResult();

private:
    int iId;

    const QString iHostName;
    QString iEncodedHostName;
    TPtrC iHostNamePtr;

    RSocketServ& iSocketServ;
    RHostResolver iHostResolver;
    QSharedPointer<QNetworkSession> iNetworkSession;

    TNameEntry iNameResult;
    TInetAddr IpAdd;

    QHostAddress iAddress;

    QHostInfo iResults;

    QList<QHostAddress> iHostAddresses;

    enum {
        EIdle,
        EGetByName,
        EGetByAddress,
        ECompleteFromCache,
        EError
    } iState;
};

class QSymbianHostInfoLookupManager : public QAbstractHostInfoLookupManager
{
    Q_OBJECT
public:
    QSymbianHostInfoLookupManager();
    ~QSymbianHostInfoLookupManager();

    static QSymbianHostInfoLookupManager* globalInstance();

    int id();
    void clear();

    // called from QHostInfo
    void scheduleLookup(QSymbianHostResolver *r);
    void abortLookup(int id);

    // called from QSymbianHostResolver
    void lookupFinished(QSymbianHostResolver *r);

private:
    void runNextLookup();

    // this is true for single threaded use, with multiple threads the max is ((number of threads) + KMaxConcurrentLookups - 1)
    static const int KMaxConcurrentLookups = 5;

    QList<QSymbianHostResolver*> iCurrentLookups;
    QList<QSymbianHostResolver*> iScheduledLookups;

    QMutex mutex;
};
#endif



QT_END_NAMESPACE

#endif // QHOSTINFO_P_H