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#include "qlocalsocket.h"

#include "qlocalsocket_p.h"

#include "qnet_unix_p.h"

#ifndef QT_NO_LOCALSOCKET

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <qdatetime.h>

#include <qdir.h>

#include <qdebug.h>

#ifdef Q_OS_VXWORKS

#  include <selectLib.h>

#endif

#define QT_CONNECT_TIMEOUT 30000

QT_BEGIN_NAMESPACE

QLocalSocketPrivate::QLocalSocketPrivate() : QIODevicePrivate(),

        delayConnect(0),

        connectTimer(0),

        connectingSocket(-1),

        connectingOpenMode(0),

        state(QLocalSocket::UnconnectedState)

{

}

void QLocalSocketPrivate::init()

{

    Q_Q(QLocalSocket);

    // QIODevice signals

    q->connect(&unixSocket, SIGNAL(aboutToClose()), q, SIGNAL(aboutToClose()));

    q->connect(&unixSocket, SIGNAL(bytesWritten(qint64)),

               q, SIGNAL(bytesWritten(qint64)));

    q->connect(&unixSocket, SIGNAL(readyRead()), q, SIGNAL(readyRead()));

    // QAbstractSocket signals

    q->connect(&unixSocket, SIGNAL(connected()), q, SIGNAL(connected()));

    q->connect(&unixSocket, SIGNAL(disconnected()), q, SIGNAL(disconnected()));

    q->connect(&unixSocket, SIGNAL(stateChanged(QAbstractSocket::SocketState)),

               q, SLOT(_q_stateChanged(QAbstractSocket::SocketState)));

    q->connect(&unixSocket, SIGNAL(error(QAbstractSocket::SocketError)),

               q, SLOT(_q_error(QAbstractSocket::SocketError)));

    q->connect(&unixSocket, SIGNAL(readChannelFinished()), q, SIGNAL(readChannelFinished()));

    unixSocket.setParent(q);

}

void QLocalSocketPrivate::_q_error(QAbstractSocket::SocketError socketError)

{

    Q_Q(QLocalSocket);

    QString function = QLatin1String("QLocalSocket");

    QLocalSocket::LocalSocketError error = (QLocalSocket::LocalSocketError)socketError;

    QString errorString = generateErrorString(error, function);

    q->setErrorString(errorString);

    emit q->error(error);

}

void QLocalSocketPrivate::_q_stateChanged(QAbstractSocket::SocketState newState)

{

    Q_Q(QLocalSocket);

    QLocalSocket::LocalSocketState currentState = state;

    switch(newState) {

    case QAbstractSocket::UnconnectedState:

        state = QLocalSocket::UnconnectedState;

        serverName = QString();

        fullServerName = QString();

        break;

    case QAbstractSocket::ConnectingState:

        state = QLocalSocket::ConnectingState;

        break;

    case QAbstractSocket::ConnectedState:

        state = QLocalSocket::ConnectedState;

        break;

    case QAbstractSocket::ClosingState:

        state = QLocalSocket::ClosingState;

        break;

    default:

#if defined QLOCALSOCKET_DEBUG

        qWarning() << "QLocalSocket::Unhandled socket state change:" << newState;

#endif

        return;

    }

    if (currentState != state)

        emit q->stateChanged(state);

}

QString QLocalSocketPrivate::generateErrorString(QLocalSocket::LocalSocketError error, const QString &function) const

{

    QString errorString;

    switch (error) {

    case QLocalSocket::ConnectionRefusedError:

        errorString = QLocalSocket::tr("%1: Connection refused").arg(function);

        break;

    case QLocalSocket::PeerClosedError:

        errorString = QLocalSocket::tr("%1: Remote closed").arg(function);

        break;

    case QLocalSocket::ServerNotFoundError:

        errorString = QLocalSocket::tr("%1: Invalid name").arg(function);

        break;

    case QLocalSocket::SocketAccessError:

        errorString = QLocalSocket::tr("%1: Socket access error").arg(function);

        break;

    case QLocalSocket::SocketResourceError:

        errorString = QLocalSocket::tr("%1: Socket resource error").arg(function);

        break;

    case QLocalSocket::SocketTimeoutError:

        errorString = QLocalSocket::tr("%1: Socket operation timed out").arg(function);

        break;

    case QLocalSocket::DatagramTooLargeError:

        errorString = QLocalSocket::tr("%1: Datagram too large").arg(function);

        break;

    case QLocalSocket::ConnectionError:

        errorString = QLocalSocket::tr("%1: Connection error").arg(function);

        break;

    case QLocalSocket::UnsupportedSocketOperationError:

        errorString = QLocalSocket::tr("%1: The socket operation is not supported").arg(function);

        break;

    case QLocalSocket::UnknownSocketError:

    default:

        errorString = QLocalSocket::tr("%1: Unknown error %2").arg(function).arg(errno);

    }

    return errorString;

}

void QLocalSocketPrivate::errorOccurred(QLocalSocket::LocalSocketError error, const QString &function)

{

    Q_Q(QLocalSocket);

    switch (error) {

    case QLocalSocket::ConnectionRefusedError:

        unixSocket.setSocketError(QAbstractSocket::ConnectionRefusedError);

        break;

    case QLocalSocket::PeerClosedError:

        unixSocket.setSocketError(QAbstractSocket::RemoteHostClosedError);

        break;

    case QLocalSocket::ServerNotFoundError:

        unixSocket.setSocketError(QAbstractSocket::HostNotFoundError);

        break;

    case QLocalSocket::SocketAccessError:

        unixSocket.setSocketError(QAbstractSocket::SocketAccessError);

        break;

    case QLocalSocket::SocketResourceError:

        unixSocket.setSocketError(QAbstractSocket::SocketResourceError);

        break;

    case QLocalSocket::SocketTimeoutError:

        unixSocket.setSocketError(QAbstractSocket::SocketTimeoutError);

        break;

    case QLocalSocket::DatagramTooLargeError:

        unixSocket.setSocketError(QAbstractSocket::DatagramTooLargeError);

        break;

    case QLocalSocket::ConnectionError:

        unixSocket.setSocketError(QAbstractSocket::NetworkError);

        break;

    case QLocalSocket::UnsupportedSocketOperationError:

        unixSocket.setSocketError(QAbstractSocket::UnsupportedSocketOperationError);

        break;

    case QLocalSocket::UnknownSocketError:

    default:

        unixSocket.setSocketError(QAbstractSocket::UnknownSocketError);

    }

    QString errorString = generateErrorString(error, function);

    q->setErrorString(errorString);

    emit q->error(error);

    // errors cause a disconnect

    unixSocket.setSocketState(QAbstractSocket::UnconnectedState);

    bool stateChanged = (state != QLocalSocket::UnconnectedState);

    state = QLocalSocket::UnconnectedState;

    q->close();

    if (stateChanged)

        q->emit stateChanged(state);

}

void QLocalSocket::connectToServer(const QString &name, OpenMode openMode)

{

    Q_D(QLocalSocket);

    if (state() == ConnectedState

        || state() == ConnectingState)

        return;

    d->errorString = QString();

    d->unixSocket.setSocketState(QAbstractSocket::ConnectingState);

    d->state = ConnectingState;

    emit stateChanged(d->state);

    if (name.isEmpty()) {

        d->errorOccurred(ServerNotFoundError,

                QLatin1String("QLocalSocket::connectToServer"));

        return;

    }

    // create the socket

    if (-1 == (d->connectingSocket = qt_safe_socket(PF_UNIX, SOCK_STREAM, 0))) {

        d->errorOccurred(UnsupportedSocketOperationError,

                        QLatin1String("QLocalSocket::connectToServer"));

        return;

    }

#ifndef Q_OS_SYMBIAN

    // set non blocking so we can try to connect and it wont wait

    int flags = fcntl(d->connectingSocket, F_GETFL, 0);

    if (-1 == flags

        || -1 == (fcntl(d->connectingSocket, F_SETFL, flags | O_NONBLOCK))) {

        d->errorOccurred(UnknownSocketError,

                QLatin1String("QLocalSocket::connectToServer"));

        return;

    }

#endif

    // _q_connectToSocket does the actual connecting

    d->connectingName = name;

    d->connectingOpenMode = openMode;

    d->_q_connectToSocket();

}

/*!

    \internal

    Tries to connect connectingName and connectingOpenMode

    \sa connectToServer() waitForConnected()

  */

void QLocalSocketPrivate::_q_connectToSocket()

{

    Q_Q(QLocalSocket);

    QString connectingPathName;

    // determine the full server path

    if (connectingName.startsWith(QLatin1Char('/'))) {

        connectingPathName = connectingName;

    } else {

        connectingPathName = QDir::tempPath();

        connectingPathName += QLatin1Char('/') + connectingName;

    }

    struct sockaddr_un name;

    name.sun_family = PF_UNIX;

    if (sizeof(name.sun_path) < (uint)connectingPathName.toLatin1().size() + 1) {

        QString function = QLatin1String("QLocalSocket::connectToServer");

        errorOccurred(QLocalSocket::ServerNotFoundError, function);

        return;

    }

    ::memcpy(name.sun_path, connectingPathName.toLatin1().data(),

             connectingPathName.toLatin1().size() + 1);

    if (-1 == qt_safe_connect(connectingSocket, (struct sockaddr *)&name, sizeof(name))) {

        QString function = QLatin1String("QLocalSocket::connectToServer");

        switch (errno)

        {

        case EINVAL:

        case ECONNREFUSED:

            errorOccurred(QLocalSocket::ConnectionRefusedError, function);

            break;

        case ENOENT:

            errorOccurred(QLocalSocket::ServerNotFoundError, function);

            break;

        case EACCES:

        case EPERM:

            errorOccurred(QLocalSocket::SocketAccessError, function);

            break;

        case ETIMEDOUT:

            errorOccurred(QLocalSocket::SocketTimeoutError, function);

            break;

        case EAGAIN:

            // Try again later, all of the sockets listening are full

            if (!delayConnect) {

                delayConnect = new QSocketNotifier(connectingSocket, QSocketNotifier::Write, q);

                q->connect(delayConnect, SIGNAL(activated(int)), q, SLOT(_q_connectToSocket()));

            }

            if (!connectTimer) {

                connectTimer = new QTimer(q);

                q->connect(connectTimer, SIGNAL(timeout()),

                                 q, SLOT(_q_abortConnectionAttempt()),

                                 Qt::DirectConnection);

                connectTimer->start(QT_CONNECT_TIMEOUT);

            }

            delayConnect->setEnabled(true);

            break;

        default:

            errorOccurred(QLocalSocket::UnknownSocketError, function);

        }

        return;

    }

    // connected!

    cancelDelayedConnect();

    serverName = connectingName;

    fullServerName = connectingPathName;

    if (unixSocket.setSocketDescriptor(connectingSocket,

        QAbstractSocket::ConnectedState, connectingOpenMode)) {

        q->QIODevice::open(connectingOpenMode);

        q->emit connected();

    } else {

        QString function = QLatin1String("QLocalSocket::connectToServer");

        errorOccurred(QLocalSocket::UnknownSocketError, function);

    }

    connectingSocket = -1;

    connectingName = QString();

    connectingOpenMode = 0;

}

bool QLocalSocket::setSocketDescriptor(quintptr socketDescriptor,

        LocalSocketState socketState, OpenMode openMode)

{

    Q_D(QLocalSocket);

    QAbstractSocket::SocketState newSocketState = QAbstractSocket::UnconnectedState;

    switch (socketState) {

    case ConnectingState:

        newSocketState = QAbstractSocket::ConnectingState;

        break;

    case ConnectedState:

        newSocketState = QAbstractSocket::ConnectedState;

        break;

    case ClosingState:

        newSocketState = QAbstractSocket::ClosingState;

        break;

    case UnconnectedState:

        newSocketState = QAbstractSocket::UnconnectedState;

        break;

    }

    QIODevice::open(openMode);

    d->state = socketState;

    return d->unixSocket.setSocketDescriptor(socketDescriptor,

                                             newSocketState, openMode);

}

void QLocalSocketPrivate::_q_abortConnectionAttempt()

{

    Q_Q(QLocalSocket);

    q->close();

}

void QLocalSocketPrivate::cancelDelayedConnect()

{

    if (delayConnect) {

        delayConnect->setEnabled(false);

        delete delayConnect;

        delayConnect = 0;

        connectTimer->stop();

        delete connectTimer;

        connectTimer = 0;

    }

}

quintptr QLocalSocket::socketDescriptor() const

{

    Q_D(const QLocalSocket);

    return d->unixSocket.socketDescriptor();

}

qint64 QLocalSocket::readData(char *data, qint64 c)

{

    Q_D(QLocalSocket);

    return d->unixSocket.readData(data, c);

}

qint64 QLocalSocket::writeData(const char *data, qint64 c)

{

    Q_D(QLocalSocket);

    return d->unixSocket.writeData(data, c);

}

void QLocalSocket::abort()

{

    Q_D(QLocalSocket);

    d->unixSocket.abort();

}

qint64 QLocalSocket::bytesAvailable() const

{

    Q_D(const QLocalSocket);

    return QIODevice::bytesAvailable() + d->unixSocket.bytesAvailable();

}

qint64 QLocalSocket::bytesToWrite() const

{

    Q_D(const QLocalSocket);

    return d->unixSocket.bytesToWrite();

}

bool QLocalSocket::canReadLine() const

{

    Q_D(const QLocalSocket);

    return QIODevice::canReadLine() || d->unixSocket.canReadLine();

}

void QLocalSocket::close()

{

    Q_D(QLocalSocket);

    d->unixSocket.close();

    d->cancelDelayedConnect();

    if (d->connectingSocket != -1)

        ::close(d->connectingSocket);

    d->connectingSocket = -1;

    d->connectingName = QString();

    d->connectingOpenMode = 0;

    d->serverName = QString();

    d->fullServerName = QString();

    QIODevice::close();

}

bool QLocalSocket::waitForBytesWritten(int msecs)

{

    Q_D(QLocalSocket);

    return d->unixSocket.waitForBytesWritten(msecs);

}

bool QLocalSocket::flush()

{

    Q_D(QLocalSocket);

    return d->unixSocket.flush();

}

void QLocalSocket::disconnectFromServer()

{

    Q_D(QLocalSocket);

    d->unixSocket.disconnectFromHost();

}

QLocalSocket::LocalSocketError QLocalSocket::error() const

{

    Q_D(const QLocalSocket);

    switch (d->unixSocket.error()) {

    case QAbstractSocket::ConnectionRefusedError:

        return QLocalSocket::ConnectionRefusedError;

    case QAbstractSocket::RemoteHostClosedError:

        return QLocalSocket::PeerClosedError;

    case QAbstractSocket::HostNotFoundError:

        return QLocalSocket::ServerNotFoundError;

    case QAbstractSocket::SocketAccessError:

        return QLocalSocket::SocketAccessError;

    case QAbstractSocket::SocketResourceError:

        return QLocalSocket::SocketResourceError;

    case QAbstractSocket::SocketTimeoutError:

        return QLocalSocket::SocketTimeoutError;

    case QAbstractSocket::DatagramTooLargeError:

        return QLocalSocket::DatagramTooLargeError;

    case QAbstractSocket::NetworkError:

        return QLocalSocket::ConnectionError;

    case QAbstractSocket::UnsupportedSocketOperationError:

        return QLocalSocket::UnsupportedSocketOperationError;

    case QAbstractSocket::UnknownSocketError:

        return QLocalSocket::UnknownSocketError;

    default:

#if defined QLOCALSOCKET_DEBUG

        qWarning() << "QLocalSocket error not handled:" << d->unixSocket.error();

#endif

        break;

    }

    return UnknownSocketError;

}

bool QLocalSocket::isValid() const

{

    Q_D(const QLocalSocket);

    return d->unixSocket.isValid();

}

qint64 QLocalSocket::readBufferSize() const

{

    Q_D(const QLocalSocket);

    return d->unixSocket.readBufferSize();

}

void QLocalSocket::setReadBufferSize(qint64 size)

{

    Q_D(QLocalSocket);

    d->unixSocket.setReadBufferSize(size);

}

bool QLocalSocket::waitForConnected(int msec)

{

    Q_D(QLocalSocket);

    if (state() != ConnectingState)

        return (state() == ConnectedState);

    fd_set fds;

    FD_ZERO(&fds);

    FD_SET(d->connectingSocket, &fds);

    timeval timeout;

    timeout.tv_sec = msec / 1000;