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#include "qnetworkinterface.h"

#include "qnetworkinterface_p.h"

#include "qdebug.h"

#include "qendian.h"

#ifndef QT_NO_NETWORKINTERFACE

QT_BEGIN_NAMESPACE

static QList<QNetworkInterfacePrivate *> postProcess(QList<QNetworkInterfacePrivate *> list)

{

    // Some platforms report a netmask but don't report a broadcast address

    // Go through all available addresses and calculate the broadcast address

    // from the IP and the netmask

    //

    // This is an IPv4-only thing -- IPv6 has no concept of broadcasts

    // The math is:

    //    broadcast = IP | ~netmask

    QList<QNetworkInterfacePrivate *>::Iterator it = list.begin();

    const QList<QNetworkInterfacePrivate *>::Iterator end = list.end();

    for ( ; it != end; ++it) {

        QList<QNetworkAddressEntry>::Iterator addr_it = (*it)->addressEntries.begin();

        const QList<QNetworkAddressEntry>::Iterator addr_end = (*it)->addressEntries.end();

        for ( ; addr_it != addr_end; ++addr_it) {

            if (addr_it->ip().protocol() != QAbstractSocket::IPv4Protocol)

                continue;

            if (!addr_it->netmask().isNull() && addr_it->broadcast().isNull()) {

                QHostAddress bcast = addr_it->ip();

                bcast = QHostAddress(bcast.toIPv4Address() | ~addr_it->netmask().toIPv4Address());

                addr_it->setBroadcast(bcast);

            }

        }

    }

    return list;

}

Q_GLOBAL_STATIC(QNetworkInterfaceManager, manager)

QNetworkInterfaceManager::QNetworkInterfaceManager()

{

}

QNetworkInterfaceManager::~QNetworkInterfaceManager()

{

}

QSharedDataPointer<QNetworkInterfacePrivate> QNetworkInterfaceManager::interfaceFromName(const QString &name)

{

    QList<QSharedDataPointer<QNetworkInterfacePrivate> > interfaceList = allInterfaces();

    QList<QSharedDataPointer<QNetworkInterfacePrivate> >::ConstIterator it = interfaceList.constBegin();

    for ( ; it != interfaceList.constEnd(); ++it)

        if ((*it)->name == name)

            return *it;

    return empty;

}

QSharedDataPointer<QNetworkInterfacePrivate> QNetworkInterfaceManager::interfaceFromIndex(int index)

{

    QList<QSharedDataPointer<QNetworkInterfacePrivate> > interfaceList = allInterfaces();

    QList<QSharedDataPointer<QNetworkInterfacePrivate> >::ConstIterator it = interfaceList.constBegin();

    for ( ; it != interfaceList.constEnd(); ++it)

        if ((*it)->index == index)

            return *it;

    return empty;

}

QList<QSharedDataPointer<QNetworkInterfacePrivate> > QNetworkInterfaceManager::allInterfaces()

{

    QList<QNetworkInterfacePrivate *> list = postProcess(scan());

    QList<QSharedDataPointer<QNetworkInterfacePrivate> > result;

    foreach (QNetworkInterfacePrivate *ptr, list)

        result << QSharedDataPointer<QNetworkInterfacePrivate>(ptr);

    return result;

}

QString QNetworkInterfacePrivate::makeHwAddress(int len, uchar *data)

{

    QString result;

    for (int i = 0; i < len; ++i) {

        if (i)

            result += QLatin1Char(':');

        char buf[3];

#if defined(Q_OS_WIN) && !defined(Q_OS_WINCE) && defined(_MSC_VER) && _MSC_VER >= 1400

        sprintf_s(buf, 3, "%02hX", ushort(data[i]));

#else

        sprintf(buf, "%02hX", ushort(data[i]));

#endif

        result += QLatin1String(buf);

    }

    return result;

}

/*!

    \class QNetworkAddressEntry

    \brief The QNetworkAddressEntry class stores one IP address

    supported by a network interface, along with its associated

    netmask and broadcast address.

    \since 4.2

    \reentrant

    \ingroup network

    Each network interface can contain zero or more IP addresses, which

    in turn can be associated with a netmask and/or a broadcast

    address (depending on support from the operating system).

    This class represents one such group.

*/

/*!

    Constructs an empty QNetworkAddressEntry object.

*/

QNetworkAddressEntry::QNetworkAddressEntry()

    : d(new QNetworkAddressEntryPrivate)

{

}

/*!

    Constructs a QNetworkAddressEntry object that is a copy of the

    object \a other.

*/

QNetworkAddressEntry::QNetworkAddressEntry(const QNetworkAddressEntry &other)

    : d(new QNetworkAddressEntryPrivate(*other.d.data()))

{

}

/*!

    Makes a copy of the QNetworkAddressEntry object \a other.

*/

QNetworkAddressEntry &QNetworkAddressEntry::operator=(const QNetworkAddressEntry &other)

{

    *d.data() = *other.d.data();

    return *this;

}

/*!

    Destroys this QNetworkAddressEntry object.

*/

QNetworkAddressEntry::~QNetworkAddressEntry()

{

}

/*!

    Returns true if this network address entry is the same as \a

    other.

*/

bool QNetworkAddressEntry::operator==(const QNetworkAddressEntry &other) const

{

    if (d == other.d) return true;

    if (!d || !other.d) return false;

    return d->address == other.d->address &&

        d->netmask == other.d->netmask &&

        d->broadcast == other.d->broadcast;

}

/*!

    \fn bool QNetworkAddressEntry::operator!=(const QNetworkAddressEntry &other) const

    Returns true if this network address entry is different from \a

    other.

*/

/*!

    This function returns one IPv4 or IPv6 address found, that was

    found in a network interface.

*/

QHostAddress QNetworkAddressEntry::ip() const

{

    return d->address;

}

/*!

    Sets the IP address the QNetworkAddressEntry object contains to \a

    newIp.

*/

void QNetworkAddressEntry::setIp(const QHostAddress &newIp)

{

    d->address = newIp;

}

/*!

    Returns the netmask associated with the IP address. The

    netmask is expressed in the form of an IP address, such as

    255.255.0.0.

    For IPv6 addresses, the prefix length is converted to an address

    where the number of bits set to 1 is equal to the prefix

    length. For a prefix length of 64 bits (the most common value),

    the netmask will be expressed as a QHostAddress holding the

    address FFFF:FFFF:FFFF:FFFF::

    \sa prefixLength()

*/

QHostAddress QNetworkAddressEntry::netmask() const

{

    return d->netmask;

}

/*!

    Sets the netmask that this QNetworkAddressEntry object contains to

    \a newNetmask. Setting the netmask also sets the prefix length to

    match the new netmask.

    \sa setPrefixLength()

*/

void QNetworkAddressEntry::setNetmask(const QHostAddress &newNetmask)

{

    if (newNetmask.protocol() != ip().protocol()) {

        d->netmask = QNetmaskAddress();

        return;

    }

    d->netmask.setAddress(newNetmask);

}

/*!

    \since 4.5

    Returns the prefix length of this IP address. The prefix length

    matches the number of bits set to 1 in the netmask (see

    netmask()). For IPv4 addresses, the value is between 0 and 32. For

    IPv6 addresses, it's contained between 0 and 128 and is the

    preferred form of representing addresses.

    This function returns -1 if the prefix length could not be

    determined (i.e., netmask() returns a null QHostAddress()).

    \sa netmask()

*/

int QNetworkAddressEntry::prefixLength() const

{

    return d->netmask.prefixLength();

}

/*!

    \since 4.5

    Sets the prefix length of this IP address to \a length. The value

    of \a length must be valid for this type of IP address: between 0

    and 32 for IPv4 addresses, between 0 and 128 for IPv6

    addresses. Setting to any invalid value is equivalent to setting

    to -1, which means "no prefix length".

    Setting the prefix length also sets the netmask (see netmask()).

    \sa setNetmask()

*/

void QNetworkAddressEntry::setPrefixLength(int length)

{

    d->netmask.setPrefixLength(d->address.protocol(), length);

}

/*!

    Returns the broadcast address associated with the IPv4

    address and netmask. It can usually be derived from those two by

    setting to 1 the bits of the IP address where the netmask contains

    a 0. (In other words, by bitwise-OR'ing the IP address with the

    inverse of the netmask)

    This member is always empty for IPv6 addresses, since the concept

    of broadcast has been abandoned in that system in favor of

    multicast. In particular, the group of hosts corresponding to all

    the nodes in the local network can be reached by the "all-nodes"

    special multicast group (address FF02::1).

*/

QHostAddress QNetworkAddressEntry::broadcast() const

{

    return d->broadcast;

}

/*!

    Sets the broadcast IP address of this QNetworkAddressEntry object

    to \a newBroadcast.

*/

void QNetworkAddressEntry::setBroadcast(const QHostAddress &newBroadcast)

{

    d->broadcast = newBroadcast;

}

/*!

    \class QNetworkInterface

    \brief The QNetworkInterface class provides a listing of the host's IP

    addresses and network interfaces.

    \since 4.2

    \reentrant

    \ingroup network

    QNetworkInterface represents one network interface attached to the

    host where the program is being run. Each network interface may

    contain zero or more IP addresses, each of which is optionally

    associated with a netmask and/or a broadcast address. The list of

    such trios can be obtained with addressEntries(). Alternatively,

    when the netmask or the broadcast addresses aren't necessary, use

    the allAddresses() convenience function to obtain just the IP

    addresses.

    QNetworkInterface also reports the interface's hardware address with

    hardwareAddress().

    Not all operating systems support reporting all features. Only the

    IPv4 addresses are guaranteed to be listed by this class in all

    platforms. In particular, IPv6 address listing is only supported

    on Windows XP and more recent versions, Linux, MacOS X and the

    BSDs.

    \sa QNetworkAddressEntry

*/

/*!

    \enum QNetworkInterface::InterfaceFlag

    Specifies the flags associated with this network interface. The

    possible values are:

    \value IsUp                 the network interface is active

    \value IsRunning            the network interface has resources

                                allocated

    \value CanBroadcast         the network interface works in

                                broadcast mode

    \value IsLoopBack           the network interface is a loopback

                                interface: that is, it's a virtual

                                interface whose destination is the

                                host computer itself

    \value IsPointToPoint       the network interface is a

                                point-to-point interface: that is,

                                there is one, single other address

                                that can be directly reached by it.

    \value CanMulticast         the network interface supports

                                multicasting

    Note that one network interface cannot be both broadcast-based and

    point-to-point.

*/

/*!

    Constructs an empty network interface object.

*/

QNetworkInterface::QNetworkInterface()

    : d(0)

{

}

/*!

    Frees the resources associated with the QNetworkInterface object.

*/

QNetworkInterface::~QNetworkInterface()

{

}

/*!

    Creates a copy of the QNetworkInterface object contained in \a

    other.

*/

QNetworkInterface::QNetworkInterface(const QNetworkInterface &other)

    : d(other.d)

{

}

/*!

    Copies the contents of the QNetworkInterface object contained in \a

    other into this one.

*/

QNetworkInterface &QNetworkInterface::operator=(const QNetworkInterface &other)

{

    d = other.d;

    return *this;

}

/*!

    Returns true if this QNetworkInterface object contains valid

    information about a network interface.

*/

bool QNetworkInterface::isValid() const

{

    return !name().isEmpty();

}

/*!

    \since 4.5

    Returns the interface system index, if known. This is an integer

    assigned by the operating system to identify this interface and it

    generally doesn't change. It matches the scope ID field in IPv6

    addresses.

    If the index isn't known, this function returns 0.

*/

int QNetworkInterface::index() const

{

    return d ? d->index : 0;

}

/*!

    Returns the name of this network interface. On Unix systems, this

    is a string containing the type of the interface and optionally a

    sequence number, such as "eth0", "lo" or "pcn0". On Windows, it's

    an internal ID that cannot be changed by the user.

*/

QString QNetworkInterface::name() const

{

    return d ? d->name : QString();

}

/*!

    \since 4.5

    Returns the human-readable name of this network interface on

    Windows, such as "Local Area Connection", if the name could be

    determined. If it couldn't, this function returns the same as

    name(). The human-readable name is a name that the user can modify

    in the Windows Control Panel, so it may change during the

    execution of the program.

    On Unix, this function currently always returns the same as

    name(), since Unix systems don't store a configuration for

    human-readable names.

*/

QString QNetworkInterface::humanReadableName() const

{

    return d ? !d->friendlyName.isEmpty() ? d->friendlyName : name() : QString();

}

/*!

    Returns the flags associated with this network interface.

*/

QNetworkInterface::InterfaceFlags QNetworkInterface::flags() const

{

    return d ? d->flags : InterfaceFlags(0);

}

/*!

    Returns the low-level hardware address for this interface. On

    Ethernet interfaces, this will be a MAC address in string

    representation, separated by colons.

    Other interface types may have other types of hardware

    addresses. Implementations should not depend on this function

    returning a valid MAC address.

*/

QString QNetworkInterface::hardwareAddress() const

{

    return d ? d->hardwareAddress : QString();

}

/*!

    Returns the list of IP addresses that this interface possesses

    along with their associated netmasks and broadcast addresses.

    If the netmask or broadcast address information is not necessary,

    you can call the allAddresses() function to obtain just the IP

    addresses.

*/

QList<QNetworkAddressEntry> QNetworkInterface::addressEntries() const

{

    return d ? d->addressEntries : QList<QNetworkAddressEntry>();

}

/*!

    Returns a QNetworkInterface object for the interface named \a

    name. If no such interface exists, this function returns an

    invalid QNetworkInterface object.

    \sa name(), isValid()

*/

QNetworkInterface QNetworkInterface::interfaceFromName(const QString &name)

{

    QNetworkInterface result;

    result.d = manager()->interfaceFromName(name);

    return result;

}

/*!

    Returns a QNetworkInterface object for the interface whose internal

    ID is \a index. Network interfaces have a unique identifier called

    the "interface index" to distinguish it from other interfaces on

    the system. Often, this value is assigned progressively and

    interfaces being removed and then added again get a different

    value every time.

    This index is also found in the IPv6 address' scope ID field.

*/