source: trunk/src/network/kernel/qnetworkinterface_os2.cpp@ 347

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** Copyright (C) 2009 netlabs.org. OS/2 parts.
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#include "qset.h"
#include "qnetworkinterface.h"
#include "qnetworkinterface_p.h"
#include "qalgorithms.h"

#ifndef QT_NO_NETWORKINTERFACE

#include <sys/types.h>
#include <sys/socket.h>

#include <sys/sockio.h>
#include <net/if.h>

#include <qplatformdefs.h>

QT_BEGIN_NAMESPACE

static QHostAddress addressFromSockaddr(sockaddr *sa)
{
    QHostAddress address;
    if (!sa)
        return address;

    if (sa->sa_family == AF_INET)
        address.setAddress(htonl(((sockaddr_in *)sa)->sin_addr.s_addr));
    return address;

}

static QNetworkInterface::InterfaceFlags convertFlags(uint rawFlags)
{
    QNetworkInterface::InterfaceFlags flags = 0;
    flags |= (rawFlags & IFF_UP) ? QNetworkInterface::IsUp : QNetworkInterface::InterfaceFlag(0);
    flags |= (rawFlags & IFF_RUNNING) ? QNetworkInterface::IsRunning : QNetworkInterface::InterfaceFlag(0);
    flags |= (rawFlags & IFF_BROADCAST) ? QNetworkInterface::CanBroadcast : QNetworkInterface::InterfaceFlag(0);
    flags |= (rawFlags & IFF_LOOPBACK) ? QNetworkInterface::IsLoopBack : QNetworkInterface::InterfaceFlag(0);
#ifdef IFF_POINTOPOINT //cygwin doesn't define IFF_POINTOPOINT
    flags |= (rawFlags & IFF_POINTOPOINT) ? QNetworkInterface::IsPointToPoint : QNetworkInterface::InterfaceFlag(0);
#endif

#ifdef IFF_MULTICAST
    flags |= (rawFlags & IFF_MULTICAST) ? QNetworkInterface::CanMulticast : QNetworkInterface::InterfaceFlag(0);
#endif
    return flags;
}

static const int STORAGEBUFFER_GROWTH = 256;

static QSet<QByteArray> interfaceNames(int socket)
{
    QSet<QByteArray> result;
    QByteArray storageBuffer;
    struct ifconf interfaceList;

    forever {
        // grow the storage buffer
        storageBuffer.resize(storageBuffer.size() + STORAGEBUFFER_GROWTH);
        interfaceList.ifc_buf = storageBuffer.data();
        interfaceList.ifc_len = storageBuffer.size();

        // get the interface list
        if (::ioctl(socket, SIOCGIFCONF, &interfaceList) >= 0) {
            if (int(interfaceList.ifc_len + sizeof(ifreq) + 64) < storageBuffer.size()) {
                // if the buffer was big enough, break
                storageBuffer.resize(interfaceList.ifc_len);
                break;
            }
        } else {
            // internal error
            return result;
        }
        if (storageBuffer.size() > 100000) {
            // out of space
            return result;
        }
    }

    int interfaceCount = interfaceList.ifc_len / sizeof(ifreq);
    for (int i = 0; i < interfaceCount; ++i) {
        QByteArray name = QByteArray(interfaceList.ifc_req[i].ifr_name);
        if (!name.isEmpty())
            result << name;
    }

    return result;
}

static QNetworkInterfacePrivate *findInterface(int socket, QList<QNetworkInterfacePrivate *> &interfaces,
                                               struct ifreq &req)
{
    QNetworkInterfacePrivate *iface = 0;
    int ifindex = 0;

    // Search by name
    QList<QNetworkInterfacePrivate *>::Iterator if_it = interfaces.begin();
    for ( ; if_it != interfaces.end(); ++if_it)
        if ((*if_it)->name == QLatin1String(req.ifr_name)) {
            // existing interface
            iface = *if_it;
            break;
        }

    if (!iface) {
        // new interface, create data:
        iface = new QNetworkInterfacePrivate;
        iface->index = ifindex;
        interfaces << iface;

#ifdef SIOCGIFNAME
        // Get the canonical name
        QByteArray oldName = req.ifr_name;
        if (::ioctl(socket, SIOCGIFNAME, &req) >= 0) {
            iface->name = QString::fromLatin1(req.ifr_name);

            // reset the name:
            memcpy(req.ifr_name, oldName, qMin<int>(oldName.length() + 1, sizeof(req.ifr_name) - 1));
        } else
#endif
        {
            // use this name anyways
            iface->name = QString::fromLatin1(req.ifr_name);
        }

        // Get interface flags
        if (::ioctl(socket, SIOCGIFFLAGS, &req) >= 0) {
            iface->flags = convertFlags(req.ifr_flags);
        }

#ifdef SIOCGIFHWADDR
        // Get the HW address
        if (::ioctl(socket, SIOCGIFHWADDR, &req) >= 0) {
            uchar *addr = (uchar *)&req.ifr_addr;
            iface->hardwareAddress = iface->makeHwAddress(6, addr);
        }
#endif
    }

    return iface;
}

static QList<QNetworkInterfacePrivate *> interfaceListing()
{
    QList<QNetworkInterfacePrivate *> interfaces;

    int socket;
    if ((socket = ::socket(AF_INET, SOCK_STREAM, IPPROTO_IP)) == -1)
        return interfaces;      // error

    QSet<QByteArray> names = interfaceNames(socket);
    QSet<QByteArray>::ConstIterator it = names.constBegin();
    for ( ; it != names.constEnd(); ++it) {
        ifreq req;
        memset(&req, 0, sizeof(ifreq));
        memcpy(req.ifr_name, *it, qMin<int>(it->length() + 1, sizeof(req.ifr_name) - 1));

        QNetworkInterfacePrivate *iface = findInterface(socket, interfaces, req);

        // Get the interface broadcast address
        QNetworkAddressEntry entry;
        if (iface->flags & QNetworkInterface::CanBroadcast) {
            if (::ioctl(socket, SIOCGIFBRDADDR, &req) >= 0) {
                sockaddr *sa = &req.ifr_addr;
                if (sa->sa_family == AF_INET)
                    entry.setBroadcast(addressFromSockaddr(sa));
            }
        }

        // Get the interface netmask
        if (::ioctl(socket, SIOCGIFNETMASK, &req) >= 0) {
            sockaddr *sa = &req.ifr_addr;
            entry.setNetmask(addressFromSockaddr(sa));
        }

        // Get the address of the interface
        if (::ioctl(socket, SIOCGIFADDR, &req) >= 0) {
            sockaddr *sa = &req.ifr_addr;
            entry.setIp(addressFromSockaddr(sa));
        }

        iface->addressEntries << entry;
    }

    ::close(socket);
    return interfaces;
}

QList<QNetworkInterfacePrivate *> QNetworkInterfaceManager::scan()
{
    return interfaceListing();
}

QT_END_NAMESPACE

#endif // QT_NO_NETWORKINTERFACE