summaryrefslogtreecommitdiffstats
path: root/src/qtdevicesettings/networksettingsplugin/networksettings/wpasupplicant/qnetworksettingsmanager_p.cpp
blob: 17a1f2f95a3a736d4b1416c6dc13c459f9c4f179 (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
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the Qt Device Utilities module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL3$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later 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 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QProcess>
#include "qnetworksettingsmanager_p.h"
#include "qwificontroller_p.h"
#include "qnetworksettingsinterface_p.h"
#include "qnetworksettingsservice_p.h"
#include "qnetworksettingsuseragent.h"
#include "qwifisupplicant_p.h"

QNetworkSettingsManagerPrivate::QNetworkSettingsManagerPrivate(QNetworkSettingsManager *parent)
    :QObject(parent)
    ,q_ptr(parent)
{
    m_serviceFilter.setSourceModel(&m_serviceModel);
    m_wifiController = new QWifiController(this);
    m_wifiController->asyncCall(QWifiController::InitializeBackend);

    QObject::connect(m_wifiController, &QWifiController::backendStateChanged,
                     this, &QNetworkSettingsManagerPrivate::handleBackendStateChanged);
    QObject::connect(m_wifiController, &QWifiController::dhcpRequestFinished,
                     this, &QNetworkSettingsManagerPrivate::handleDhcpRequestFinished);

    QObject::connect(m_wifiController, &QWifiController::raiseError, this, &QNetworkSettingsManagerPrivate::updateLastError);
    m_wifiController->start();

    updateWifiState();
}

QNetworkSettingsManagerPrivate::~QNetworkSettingsManagerPrivate()
{
    m_wifiController->asyncCall(QWifiController::ExitEventLoop);
    m_wifiController->wait();
    delete m_wifiController;
}

bool QNetworkSettingsManagerPrivate::event(QEvent *event)
{
    switch ((int) event->type()) {
    case WIFI_SCAN_RESULTS:
        parseScanResults(call(QStringLiteral("SCAN_RESULTS")));
        return true;
    case WIFI_CONNECTED:
        handleConnected();
        return true;
    case WIFI_DISCONNECTED:
        handleDisconneced();
        return true;
    case WIFI_AUTHENTICATING:
        handleAuthenticating(static_cast<QWifiEvent *>(event));
        return true;
    case WIFI_HANDSHAKE_FAILED:
        updateNetworkState(QNetworkSettingsState::Failure);
        return true;
    }
    return QObject::event(event);
}

void QNetworkSettingsManagerPrivate::connectNetwork(const QString& ssid)
{
    if (m_backendState != QWifiController::Running) {
        qCWarning(B2QT_WIFI) << "start wifi backend before calling connect()";
        return;
    }

    call(QStringLiteral("DISABLE_NETWORK all"));
    m_currentSSID = ssid;
    emit m_agent->showUserCredentialsInput();
}

void QNetworkSettingsManagerPrivate::userInteractionReady(bool cancel)
{
    if (cancel) {
        m_currentSSID = "";
        return;
    }
    bool networkKnown = false;
    QString id;
    const QStringList configuredNetworks = call(QStringLiteral("LIST_NETWORKS")).split('\n');
    for (int i = 1; i < configuredNetworks.length(); ++i) {
        const QStringList networkFields = configuredNetworks.at(i).split('\t');
        const QString ssid = QWifiSupplicant::decodeSsid(networkFields.at(1));
        if (ssid == m_currentSSID) {
            id = networkFields.at(0);
            networkKnown = true;
            break;
        }
    }

    if (!networkKnown) {
        bool ok;
        id = call(QStringLiteral("ADD_NETWORK"));
        id.toInt(&ok);
        if (!ok) {
            updateLastError(QStringLiteral("failed to add network"));
            return;
        }
    }

    bool ok = true;
    QChar q = QLatin1Char('"');
    QString setNetworkCommand = QLatin1String("SET_NETWORK ") + id;
    if (!networkKnown) {
        ok = ok && checkedCall(setNetworkCommand + QLatin1String(" ssid ") + q + m_currentSSID + q);
    }

    QString key_mgmt;
    WpaSupplicantService *service = networkForSSID(m_currentSSID);
    if (!service) {
        return;
    }
    QString psk = m_agent->passPhrase();

    // --------------------- configure network ------------------------------
    // ref: http://w1.fi/cgit/hostap/plain/wpa_supplicant/wpa_supplicant.conf
    // ref: https://www.freebsd.org/cgi/man.cgi?wpa_supplicant.conf
    // ----------------------------------------------------------------------
    if (service->wirelessConfig()->supportsSecurity(QNetworkSettingsWireless::WPA) ||
               service->wirelessConfig()->supportsSecurity(QNetworkSettingsWireless::WPA2)) {
        // ### TODO - password length has limits (see IEEE 802.11), we need to check
        // for those limits here. Supplicant gives only a meaningless "fail" message.
        ok = ok && checkedCall(setNetworkCommand + QLatin1String(" psk ") + q + psk + q);
        key_mgmt = QLatin1String("WPA-PSK");
    } else if (service->wirelessConfig()->supportsSecurity(QNetworkSettingsWireless::WEP)) {
        ok = ok && checkedCall(setNetworkCommand + QLatin1String(" wep_key0 ") + q + psk + q);
        ok = ok && checkedCall(setNetworkCommand + QLatin1String(" auth_alg OPEN SHARED"));
        key_mgmt = QLatin1String("NONE");
    } else if (service->wirelessConfig()->supportsSecurity(QNetworkSettingsWireless::None)) {
        // open network
        key_mgmt = QLatin1String("NONE");
    }

    if (service->wirelessConfig()->hidden())
        ok = ok && checkedCall(setNetworkCommand + QLatin1String(" scan_ssid 1"));

    ok = ok && checkedCall(setNetworkCommand + QLatin1String(" key_mgmt ") + key_mgmt);
    if (!ok) {
        if (!networkKnown)
            call(QLatin1String("REMOVE_NETWORK ") + id);
        updateLastError(QLatin1String("failed to set properties on network: ") + id);
        return;
    }

    call(QLatin1String("SELECT_NETWORK ") + id);
    call(QStringLiteral("RECONNECT"));
}

void QNetworkSettingsManagerPrivate::disconnectNetwork()
{
    call(QStringLiteral("DISCONNECT"));
    m_wifiController->asyncCall(QWifiController::StopDhcp);
}

void QNetworkSettingsManagerPrivate::handleBackendStateChanged(QWifiController::BackendState backendState)
{
    switch (backendState) {
    case QWifiController::NotRunning:
        updateNetworkState(QNetworkSettingsState::Disconnect);
        break;
    default:
        break;
    }
    updateBackendState(backendState);
}

void QNetworkSettingsManagerPrivate::handleDhcpRequestFinished(const QString &status)
{
    qCDebug(B2QT_WIFI) << "handleDhcpRequestFinished: " << status << " for " << m_currentSSID;
    if (status == QLatin1String("success")) {
        updateNetworkState(QNetworkSettingsState::Online);
        call(QStringLiteral("SAVE_CONFIG"));
    } else {
        updateNetworkState(QNetworkSettingsState::Failure);
    }
}

void QNetworkSettingsManagerPrivate::setUserAgent(QNetworkSettingsUserAgent *agent)
{
    m_agent = agent;
    connect(m_agent, &QNetworkSettingsUserAgent::ready, this, &QNetworkSettingsManagerPrivate::userInteractionReady);
}

void QNetworkSettingsManagerPrivate::setCurrentSSID(const QString &ssid)
{
    qCDebug(B2QT_WIFI) << "current SSID: " << m_currentSSID << " -> " << ssid;
    if (m_currentSSID == ssid)
        return;

    m_currentSSID = ssid;
}

void QNetworkSettingsManagerPrivate::handleAuthenticating(QWifiEvent *event)
{
    QString data = event->data().trimmed();
    QString ssid = data.mid(data.indexOf(QLatin1String("SSID")) + 6);
    ssid = ssid.left(ssid.lastIndexOf(QLatin1Char('\'')));

    setCurrentSSID(QWifiSupplicant::decodeSsid(ssid));
    updateNetworkState(QNetworkSettingsState::Association);
}

void QNetworkSettingsManagerPrivate::handleConnected()
{
    qCDebug(B2QT_WIFI) << "connected network: " << m_currentSSID;
    updateNetworkState(QNetworkSettingsState::Ready);
    m_wifiController->asyncCall(QWifiController::AcquireIPAddress);
}

void QNetworkSettingsManagerPrivate::handleDisconneced()
{
    updateNetworkState(QNetworkSettingsState::Disconnect);
}

void QNetworkSettingsManagerPrivate::updateNetworkState(QNetworkSettingsState::States networkState)
{
    //Update interface
    if (!m_interfaceModel.getModel().isEmpty()) {
        WpaSupplicantSettingsInterface* interface = qobject_cast<WpaSupplicantSettingsInterface*>(m_interfaceModel.getModel().first());
        if (interface && interface->state() != networkState) {
            interface->setState(networkState);
        }
    }

    //Update service state
    WpaSupplicantService *service = networkForSSID(m_currentSSID);
    if (service) {
        service->setState(networkState);
    }
}

void QNetworkSettingsManagerPrivate::updateBackendState(QWifiController::BackendState backendState)
{
    if (m_backendState == backendState)
        return;

    m_backendState = backendState;

    if (m_backendState == QWifiController::Running && m_interfaceModel.getModel().isEmpty()) {
        WpaSupplicantSettingsInterface *interface = new WpaSupplicantSettingsInterface(this);
        m_interfaceModel.append(interface);
    } else if (m_backendState == QWifiController::NotRunning && m_interfaceModel.getModel().size() > 0){
        m_interfaceModel.remove(0);
    }
}

void QNetworkSettingsManagerPrivate::updateWifiState()
{
    QProcess ps;
    ps.start(QStringLiteral("ps"));
    if (!ps.waitForStarted()) {
        updateLastError(ps.program() + QLatin1String(": ") + ps.errorString());
        return;
    }

    ps.waitForFinished();
    bool supplicantRunning = ps.readAll().contains("wpa_supplicant");
    if (supplicantRunning && m_wifiController->resetSupplicantSocket())
        m_backendState = QWifiController::Running;
}

QString QNetworkSettingsManagerPrivate::call(const QString &command)
{
    if (m_backendState != QWifiController::Running)
        return QString();

    QByteArray reply;
    bool success = m_wifiController->supplicant()->sendCommand(command, &reply);
    if (!success) {
        qCDebug(B2QT_WIFI) << "call to supplicant failed";
        return QString();
    }

    return QLatin1String(reply.trimmed());
}

bool QNetworkSettingsManagerPrivate::checkedCall(const QString &command)
{
    return call(command).toUpper() == QLatin1String("OK");
}

void QNetworkSettingsManagerPrivate::updateLastError(const QString &error)
{
    qCWarning(B2QT_WIFI) << error;
    if (!m_interfaceModel.getModel().isEmpty()) {
        WpaSupplicantSettingsInterface* interface = qobject_cast<WpaSupplicantSettingsInterface*>(m_interfaceModel.getModel().first());
        if (interface) {
            interface->setState(QNetworkSettingsState::Failure);
        }
    }
}

WpaSupplicantService* QNetworkSettingsManagerPrivate::networkForSSID(const QString& ssid)
{
    int pos = 0;
    return networkForSSID(ssid, pos);
}

WpaSupplicantService* QNetworkSettingsManagerPrivate::networkForSSID(const QString& ssid, int& pos)
{
    QList<QNetworkSettingsService*> services = m_serviceModel.getModel();
    pos = 0;
    foreach (QNetworkSettingsService *service, services) {
        if (service->name() == ssid) {
            return qobject_cast<WpaSupplicantService*>(service);
        }
        pos++;
    }
    pos = -1;
    return NULL;
}

WpaSupplicantService* QNetworkSettingsManagerPrivate::outOfRangeListContains(const QString& ssid)
{
    QList<QNetworkSettingsService*> services = m_outOfRangeServiceModel.getModel();
    foreach (QNetworkSettingsService *service, services) {
        if (service->name() == ssid) {
            return qobject_cast<WpaSupplicantService*>(service);
        }
    }
    return NULL;
}

void QNetworkSettingsManagerPrivate::parseScanResults(const QString &results)
{
    QStringList lines = results.split('\n');
    QSet<QString> sensibleNetworks;

    for (int i = 1; i < lines.size(); ++i) {
        QStringList info = lines.at(i).split('\t');
        if (info.size() < 5 || info.at(4).isEmpty() || info.at(0).isEmpty())
            continue;
        int pos = 0;

        QString ssid = QWifiSupplicant::decodeSsid(info.at(4));
        if (ssid.isEmpty())
            continue;

        sensibleNetworks.insert(ssid);
        WpaSupplicantService *knownNetwork = networkForSSID(ssid, pos);

        if (!knownNetwork) {
            knownNetwork = outOfRangeListContains(ssid);
            m_outOfRangeServiceModel.getModel().removeOne(knownNetwork);
        }

        int signalStrength = info.at(2).trimmed().toInt();
        if (signalStrength < 0) {
            // signal is reported in dBm, rough conversion: best = -40, worst = -100
            int val = qAbs(qMax(-100, qMin(signalStrength, -40)) + 40); // clamp and normalize to 0
            signalStrength = 100 - (int) ((100.0 * (double) val) / 60.0);
        } else if (signalStrength > 100) {
            qCWarning(B2QT_WIFI) << "unexpected value for a signal level: " << signalStrength;
        }

        if (!knownNetwork) {
            WpaSupplicantService *network = new WpaSupplicantService(this);
            network->setId(info.at(0));
            network->setFlags(info.at(3));
            network->wirelessConfig()->setSignalStrength(signalStrength);
            network->setName(ssid);
            m_serviceModel.append(network);
        } else {
            if (knownNetwork->wirelessConfig()->outOfRange()) {
                // known network has come back into a range
                knownNetwork->wirelessConfig()->setOutOfRange(false);
                m_serviceModel.append(knownNetwork);
                pos = m_serviceModel.getModel().size() - 1;
            }
            // ssids are the same, compare bssids..
            if (knownNetwork->id() == info.at(0)) {
                // same access point, simply update the signal strength
                knownNetwork->wirelessConfig()->setSignalStrength(signalStrength);
                knownNetwork->wirelessConfig()->setOutOfRange(false);
                m_serviceModel.updated(pos);
            } else if (knownNetwork->wirelessConfig()->signalStrength() < signalStrength) {
                // replace with a stronger access point within the same network
                knownNetwork->wirelessConfig()->setOutOfRange(false);
                knownNetwork->setId(info.at(0));
                knownNetwork->setFlags(info.at(3));
                knownNetwork->wirelessConfig()->setSignalStrength(signalStrength);
                knownNetwork->setName(ssid);
                m_serviceModel.updated(pos);
            }
        }
    }
    // remove out-of-range networks from the data model
    QList<QNetworkSettingsService*> networks;
    for (int i = 0; i < networks.size();) {
        if (!sensibleNetworks.contains(networks.at(i)->name())) {
            WpaSupplicantService *n = qobject_cast<WpaSupplicantService*>(networks.at(i));
            m_serviceModel.remove(i);
            if (n) {
                n->wirelessConfig()->setOutOfRange(true);
                m_outOfRangeServiceModel.append(n);
            }
        } else {
            ++i;
        }
    }
}