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#include "qnlaengine_win_p.h"

#include "qnetworkconfiguration_p.h"

#include <QtCore/qthread.h>

#include <QtCore/qmutex.h>

#include <QtCore/qcoreapplication.h>

#include <QtCore/qstringlist.h>

#include <QtCore/qdebug.h>

#include "qnetworksessionengine_win_p.h"

QTM_BEGIN_NAMESPACE

Q_GLOBAL_STATIC(QNlaEngine, nlaEngine)

QWindowsSockInit::QWindowsSockInit()

:   version(0)

{

    //### should we try for 2.2 on all platforms ??

    WSAData wsadata;

    // IPv6 requires Winsock v2.0 or better.

    if (WSAStartup(MAKEWORD(2,0), &wsadata) != 0) {

        qWarning("QBearerManagementAPI: WinSock v2.0 initialization failed.");

    } else {

        version = 0x20;

    }

}

QWindowsSockInit::~QWindowsSockInit()

{

    WSACleanup();

}

#ifdef BEARER_MANAGEMENT_DEBUG

static void printBlob(NLA_BLOB *blob)

{

    qDebug() << "==== BEGIN NLA_BLOB ====";

    qDebug() << "type:" << blob->header.type;

    qDebug() << "size:" << blob->header.dwSize;

    qDebug() << "next offset:" << blob->header.nextOffset;

    switch (blob->header.type) {

    case NLA_RAW_DATA:

        qDebug() << "Raw Data";

        qDebug() << '\t' << blob->data.rawData;

        break;

    case NLA_INTERFACE:

        qDebug() << "Interface";

        qDebug() << "\ttype:" << blob->data.interfaceData.dwType;

        qDebug() << "\tspeed:" << blob->data.interfaceData.dwSpeed;

        qDebug() << "\tadapter:" << blob->data.interfaceData.adapterName;

        break;

    case NLA_802_1X_LOCATION:

        qDebug() << "802.1x Location";

        qDebug() << '\t' << blob->data.locationData.information;

        break;

    case NLA_CONNECTIVITY:

        qDebug() << "Connectivity";

        qDebug() << "\ttype:" << blob->data.connectivity.type;

        qDebug() << "\tinternet:" << blob->data.connectivity.internet;

        break;

    case NLA_ICS:

        qDebug() << "ICS";

        qDebug() << "\tspeed:" << blob->data.ICS.remote.speed;

        qDebug() << "\ttype:" << blob->data.ICS.remote.type;

        qDebug() << "\tstate:" << blob->data.ICS.remote.state;

        qDebug() << "\tmachine name:" << blob->data.ICS.remote.machineName;

        qDebug() << "\tshared adapter name:" << blob->data.ICS.remote.sharedAdapterName;

        break;

    default:

        qDebug() << "UNKNOWN BLOB TYPE";

    }

    qDebug() << "===== END NLA_BLOB =====";

}

#endif

static QString qGetInterfaceType(const QString &interface)

{

#ifdef Q_OS_WINCE

    Q_UNUSED(interface)

#else

    unsigned long oid;

    DWORD bytesWritten;

    NDIS_MEDIUM medium;

    NDIS_PHYSICAL_MEDIUM physicalMedium;

    HANDLE handle = CreateFile((TCHAR *)QString("\\\\.\\%1").arg(interface).utf16(), 0,

                               FILE_SHARE_READ, 0, OPEN_EXISTING, 0, 0);

    if (handle == INVALID_HANDLE_VALUE)

        return QLatin1String("Unknown");

    oid = OID_GEN_MEDIA_SUPPORTED;

    bytesWritten = 0;

    bool result = DeviceIoControl(handle, IOCTL_NDIS_QUERY_GLOBAL_STATS, &oid, sizeof(oid),

                                  &medium, sizeof(medium), &bytesWritten, 0);

    if (!result) {

        CloseHandle(handle);

        return QLatin1String("Unknown");

    }

    oid = OID_GEN_PHYSICAL_MEDIUM;

    bytesWritten = 0;

    result = DeviceIoControl(handle, IOCTL_NDIS_QUERY_GLOBAL_STATS, &oid, sizeof(oid),

                             &physicalMedium, sizeof(physicalMedium), &bytesWritten, 0);

    if (!result) {

        CloseHandle(handle);

        if (medium == NdisMedium802_3)

            return QLatin1String("Ethernet");

        else

            return QLatin1String("Unknown");

    }

    CloseHandle(handle);

    if (medium == NdisMedium802_3) {

        switch (physicalMedium) {

        case NdisPhysicalMediumWirelessLan:

            return QLatin1String("WLAN");

        case NdisPhysicalMediumBluetooth:

            return QLatin1String("Bluetooth");

        case NdisPhysicalMediumWiMax:

            return QLatin1String("WiMAX");

        default:

#ifdef BEARER_MANAGEMENT_DEBUG

            qDebug() << "Physical Medium" << physicalMedium;

#endif

            return QLatin1String("Ethernet");

        }

    }

#ifdef BEARER_MANAGEMENT_DEBUG

    qDebug() << medium << physicalMedium;

#endif

#endif

    return QLatin1String("Unknown");

}

class QNlaThread : public QThread

{

    Q_OBJECT

public:

    QNlaThread(QNlaEngine *parent = 0);

    ~QNlaThread();

    QList<QNetworkConfigurationPrivate *> getConfigurations();

    void forceUpdate();

protected:

    virtual void run();

private:

    void updateConfigurations(QList<QNetworkConfigurationPrivate *> &configs);

    DWORD parseBlob(NLA_BLOB *blob, QNetworkConfigurationPrivate *cpPriv) const;

    QNetworkConfigurationPrivate *parseQuerySet(const WSAQUERYSET *querySet) const;

    void fetchConfigurations();

signals:

    void networksChanged();

private:

    QMutex mutex;

    HANDLE handle;

    bool done;

    QList<QNetworkConfigurationPrivate *> fetchedConfigurations;

};

QNlaThread::QNlaThread(QNlaEngine *parent)

:   QThread(parent), handle(0), done(false)

{

}

QNlaThread::~QNlaThread()

{

    mutex.lock();

    done = true;

    if (handle) {

        /* cancel completion event */

        if (WSALookupServiceEnd(handle) == SOCKET_ERROR)

            qWarning("WSALookupServiceEnd error %d", WSAGetLastError());

    }

    mutex.unlock();

    wait();

}

QList<QNetworkConfigurationPrivate *> QNlaThread::getConfigurations()

{

    QMutexLocker locker(&mutex);

    QList<QNetworkConfigurationPrivate *> foundConfigurations;

    for (int i = 0; i < fetchedConfigurations.count(); ++i) {

        QNetworkConfigurationPrivate *config = new QNetworkConfigurationPrivate;

        config->name = fetchedConfigurations.at(i)->name;

        config->isValid = fetchedConfigurations.at(i)->isValid;

        config->id = fetchedConfigurations.at(i)->id;

        config->state = fetchedConfigurations.at(i)->state;

        config->type = fetchedConfigurations.at(i)->type;

        config->roamingSupported = fetchedConfigurations.at(i)->roamingSupported;

        config->purpose = fetchedConfigurations.at(i)->purpose;

        config->internet = fetchedConfigurations.at(i)->internet;

        if (QNlaEngine *engine = qobject_cast<QNlaEngine *>(parent())) {

            config->bearer = engine->bearerName(config->id);

        }

        foundConfigurations.append(config);

    }

    return foundConfigurations;

}

void QNlaThread::forceUpdate()

{

    mutex.lock();

    if (handle) {

        /* cancel completion event */

        if (WSALookupServiceEnd(handle) == SOCKET_ERROR)

            qWarning("WSALookupServiceEnd error %d", WSAGetLastError());

        handle = 0;

    }

    mutex.unlock();

}

void QNlaThread::run()

{

    WSAEVENT changeEvent = WSACreateEvent();

    if (changeEvent == WSA_INVALID_EVENT) {

        qWarning("WSACreateEvent error %d", WSAGetLastError());

        return;

    }

    while (true) {

        fetchConfigurations();

        WSAQUERYSET qsRestrictions;

        memset(&qsRestrictions, 0, sizeof(qsRestrictions));

        qsRestrictions.dwSize = sizeof(qsRestrictions);

        qsRestrictions.dwNameSpace = NS_NLA;

        mutex.lock();

        if (done) {

            mutex.unlock();

            break;

        }

        int result = WSALookupServiceBegin(&qsRestrictions, LUP_RETURN_ALL, &handle);

        mutex.unlock();

        if (result == SOCKET_ERROR) {

            qWarning("%s: WSALookupServiceBegin error %d", __FUNCTION__, WSAGetLastError());

            break;

        }

        WSACOMPLETION completion;

        WSAOVERLAPPED overlapped;

        memset(&overlapped, 0, sizeof(overlapped));

        overlapped.hEvent = changeEvent;

        memset(&completion, 0, sizeof(completion));

        completion.Type = NSP_NOTIFY_EVENT;

        completion.Parameters.Event.lpOverlapped = &overlapped;

        DWORD bytesReturned = 0;

        result = WSANSPIoctl(handle, SIO_NSP_NOTIFY_CHANGE, 0, 0, 0, 0,

                             &bytesReturned, &completion);

        if (result == SOCKET_ERROR) {

            int error = WSAGetLastError();

            if (error != WSA_IO_PENDING) {

                qWarning("WSANSPIoctl error %d", error);

                break;

            }

        }

#ifndef Q_OS_WINCE

        // Not interested in unrelated IO completion events

        // although we also don't want to block them

        while (WaitForSingleObjectEx(changeEvent, WSA_INFINITE, true) != WAIT_IO_COMPLETION) {}

#else

        WaitForSingleObject(changeEvent, WSA_INFINITE);

#endif

        mutex.lock();

        if (handle) {

            result = WSALookupServiceEnd(handle);

            if (result == SOCKET_ERROR) {

                qWarning("WSALookupServiceEnd error %d", WSAGetLastError());

                mutex.unlock();

                break;

            }

            handle = 0;

        }

        mutex.unlock();

    }

    WSACloseEvent(changeEvent);

}

void QNlaThread::updateConfigurations(QList<QNetworkConfigurationPrivate *> &configs)

{

    mutex.lock();

    while (!fetchedConfigurations.isEmpty())

        delete fetchedConfigurations.takeFirst();

    fetchedConfigurations = configs;

    mutex.unlock();

    emit networksChanged();

}

DWORD QNlaThread::parseBlob(NLA_BLOB *blob, QNetworkConfigurationPrivate *cpPriv) const

{

#ifdef BEARER_MANAGEMENT_DEBUG

    printBlob(blob);

#endif

    switch (blob->header.type) {

    case NLA_RAW_DATA:

#ifdef BEARER_MANAGEMENT_DEBUG

        qWarning("%s: unhandled header type NLA_RAW_DATA", __FUNCTION__);

#endif

        break;

    case NLA_INTERFACE:

        cpPriv->state = QNetworkConfiguration::Active;

        if (QNlaEngine *engine = qobject_cast<QNlaEngine *>(parent())) {

            engine->configurationInterface[cpPriv->id.toUInt()] =

                QString(blob->data.interfaceData.adapterName);

        }

        break;

    case NLA_802_1X_LOCATION:

#ifdef BEARER_MANAGEMENT_DEBUG

        qWarning("%s: unhandled header type NLA_802_1X_LOCATION", __FUNCTION__);

#endif

        break;

    case NLA_CONNECTIVITY:

        if (blob->data.connectivity.internet == NLA_INTERNET_YES)

            cpPriv->internet = true;

        else

            cpPriv->internet = false;

#ifdef BEARER_MANAGEMENT_DEBUG

        qWarning("%s: unhandled header type NLA_CONNECTIVITY", __FUNCTION__);

#endif

        break;

    case NLA_ICS:

#ifdef BEARER_MANAGEMENT_DEBUG

        qWarning("%s: unhandled header type NLA_ICS", __FUNCTION__);

#endif

        break;

    default:

#ifdef BEARER_MANAGEMENT_DEBUG

        qWarning("%s: unhandled header type %d", __FUNCTION__, blob->header.type);

#endif

        ;

    }

    return blob->header.nextOffset;

}

QNetworkConfigurationPrivate *QNlaThread::parseQuerySet(const WSAQUERYSET *querySet) const

{

    QNetworkConfigurationPrivate *cpPriv = new QNetworkConfigurationPrivate;

    cpPriv->name = QString::fromWCharArray(querySet->lpszServiceInstanceName);

    cpPriv->isValid = true;

    cpPriv->id = QString::number(qHash(QLatin1String("NLA:") + cpPriv->name));

    cpPriv->state = QNetworkConfiguration::Defined;

    cpPriv->type = QNetworkConfiguration::InternetAccessPoint;

#ifdef BEARER_MANAGEMENT_DEBUG

    qDebug() << "size:" << querySet->dwSize;

    qDebug() << "service instance name:" << QString::fromUtf16(querySet->lpszServiceInstanceName);

    qDebug() << "service class id:" << querySet->lpServiceClassId;

    qDebug() << "version:" << querySet->lpVersion;

    qDebug() << "comment:" << QString::fromUtf16(querySet->lpszComment);

    qDebug() << "namespace:" << querySet->dwNameSpace;

    qDebug() << "namespace provider id:" << querySet->lpNSProviderId;

    qDebug() << "context:" << QString::fromUtf16(querySet->lpszContext);

    qDebug() << "number of protocols:" << querySet->dwNumberOfProtocols;

    qDebug() << "protocols:" << querySet->lpafpProtocols;

    qDebug() << "query string:" << QString::fromUtf16(querySet->lpszQueryString);

    qDebug() << "number of cs addresses:" << querySet->dwNumberOfCsAddrs;

    qDebug() << "cs addresses:" << querySet->lpcsaBuffer;

    qDebug() << "output flags:" << querySet->dwOutputFlags;

#endif

    if (querySet->lpBlob) {

#ifdef BEARER_MANAGEMENT_DEBUG

        qDebug() << "blob size:" << querySet->lpBlob->cbSize;

        qDebug() << "blob data:" << querySet->lpBlob->pBlobData;

#endif

        DWORD offset = 0;

        do {

            NLA_BLOB *blob = reinterpret_cast<NLA_BLOB *>(querySet->lpBlob->pBlobData + offset);

            DWORD nextOffset = parseBlob(blob, cpPriv);

            if (nextOffset == offset)

                break;

            else

                offset = nextOffset;

        } while (offset != 0 && offset < querySet->lpBlob->cbSize);

    }

    return cpPriv;

}

void QNlaThread::fetchConfigurations()

{

    QList<QNetworkConfigurationPrivate *> foundConfigurations;

    WSAQUERYSET qsRestrictions;

    HANDLE hLookup = 0;

    memset(&qsRestrictions, 0, sizeof(qsRestrictions));

    qsRestrictions.dwSize = sizeof(qsRestrictions);

    qsRestrictions.dwNameSpace = NS_NLA;

    int result = WSALookupServiceBegin(&qsRestrictions, LUP_RETURN_ALL | LUP_DEEP, &hLookup);

    if (result == SOCKET_ERROR) {

        qWarning("%s: WSALookupServiceBegin error %d", __FUNCTION__, WSAGetLastError());

        mutex.lock();

        fetchedConfigurations.clear();

        mutex.unlock();

    }

    char buffer[0x10000];

    while (result == 0) {

        DWORD bufferLength = sizeof(buffer);

        result = WSALookupServiceNext(hLookup, LUP_RETURN_ALL,

                                      &bufferLength, reinterpret_cast<WSAQUERYSET *>(buffer));

        if (result == SOCKET_ERROR) {

            int error = WSAGetLastError();

            if (error == WSA_E_NO_MORE)

                break;

            if (error == WSAEFAULT) {

                qDebug() << "buffer not big enough" << bufferLength;

                break;

            }

            qWarning("WSALookupServiceNext error %d", WSAGetLastError());

            break;

        }

        QNetworkConfigurationPrivate *cpPriv =

            parseQuerySet(reinterpret_cast<WSAQUERYSET *>(buffer));

        foundConfigurations.append(cpPriv);

    }

    if (hLookup) {

        result = WSALookupServiceEnd(hLookup);

        if (result == SOCKET_ERROR) {

            qWarning("WSALookupServiceEnd error %d", WSAGetLastError());

        }

    }

    updateConfigurations(foundConfigurations);

}

QNlaEngine::QNlaEngine(QObject *parent)

:   QNetworkSessionEngine(parent), nlaThread(0)

{

    nlaThread = new QNlaThread(this);

    connect(nlaThread, SIGNAL(networksChanged()),

            this, SIGNAL(configurationsChanged()));

    nlaThread->start();

    qApp->processEvents(QEventLoop::ExcludeUserInputEvents);

}