tdelibs/dcop/dcopclient.cpp

/*****************************************************************

Copyright (c) 1999 Preston Brown <pbrown@kde.org>
Copyright (c) 1999 Matthias Ettrich <ettrich@kde.org>

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

******************************************************************/

// qt <-> dcop integration
#include <tqobjectlist.h>
#include <tqmetaobject.h>
#include <tqvariant.h>
#include <tqtimer.h>
#include <tqintdict.h>
#include <tqeventloop.h>
// end of qt <-> dcop integration

#include "config.h"

#include <config.h>
#include <dcopref.h>

#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <fcntl.h>
#include <unistd.h>

#include <ctype.h>
#include <unistd.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#ifdef HAVE_UCRED_H
#include <ucred.h>
#endif /* HAVE_UCRED_H */

#include <tqguardedptr.h>
#include <tqtextstream.h>
#include <tqfile.h>
#include <tqdir.h>
#include <tqapplication.h>
#include <tqsocketnotifier.h>
#include <tqregexp.h>

#include <tqucomextra_p.h>

#include <dcopglobal.h>
#include <dcopclient.h>
#include <dcopobject.h>

#if defined Q_WS_X11 && ! defined K_WS_QTONLY
#include <X11/Xmd.h> 
#endif
extern "C" {
#include <KDE-ICE/ICElib.h>
#include <KDE-ICE/ICEutil.h>
#include <KDE-ICE/ICEmsg.h>
#include <KDE-ICE/ICEproto.h>
}

// #define DCOPCLIENT_DEBUG	1

extern TQMap<TQCString, DCOPObject *> * kde_dcopObjMap; // defined in dcopobject.cpp

/*********************************************
 * Keep track of local clients
 *********************************************/
typedef TQAsciiDict<DCOPClient> client_map_t;
static client_map_t *DCOPClient_CliMap = 0;

static
client_map_t *cliMap()
{
    if (!DCOPClient_CliMap)
        DCOPClient_CliMap = new client_map_t;
    return DCOPClient_CliMap;
}

DCOPClient *DCOPClient::findLocalClient( const TQCString &_appId )
{
    return cliMap()->find(_appId.data());
}

static
void registerLocalClient( const TQCString &_appId, DCOPClient *client )
{
    cliMap()->replace(_appId.data(), client);
}

static
void unregisterLocalClient( const TQCString &_appId )
{
    client_map_t *map = cliMap();
    map->remove(_appId.data());
}
/////////////////////////////////////////////////////////

template class TQPtrList<DCOPObjectProxy>;
template class TQPtrList<DCOPClientTransaction>;
template class TQPtrList<_IceConn>;

struct DCOPClientMessage
{
    int opcode;
    CARD32 key;
    TQByteArray data;
};

class DCOPClient::ReplyStruct
{
public:
    enum ReplyStatus { Pending, Ok, Failed };
    ReplyStruct() {
        status = Pending;
        replyType = 0;
        replyData = 0;
        replyId = -1;
        transactionId = -1;
        replyObject = 0;
    }
    ReplyStatus status;
    TQCString* replyType;
    TQByteArray* replyData;
    int replyId;
    TQ_INT32 transactionId;
    TQCString calledApp;
    TQGuardedPtr<TQObject> replyObject;
    TQCString replySlot;
};

class DCOPClientPrivate
{
public:
    DCOPClient *parent;
    TQCString appId;
    IceConn iceConn;
    int majorOpcode; // major opcode negotiated w/server and used to tag all comms.

    int majorVersion, minorVersion; // protocol versions negotiated w/server

    static const char* serverAddr; // location of server in ICE-friendly format.
    TQSocketNotifier *notifier;
    bool non_blocking_call_lock;
    bool registered;
    bool foreign_server;
    bool accept_calls;
    bool accept_calls_override; // If true, user has specified policy.
    bool qt_bridge_enabled;

    TQCString senderId;
    TQCString objId;
    TQCString function;

    TQCString defaultObject;
    TQPtrList<DCOPClientTransaction> *transactionList;
    bool transaction;
    TQ_INT32 transactionId;
    int opcode;

    // Special key values:
    // 0 : Not specified
    // 1 : DCOPSend
    // 2 : Priority
    // >= 42: Normal
    CARD32 key;
    CARD32 currentKey; 
    CARD32 currentKeySaved;

    TQTimer postMessageTimer;
    TQPtrList<DCOPClientMessage> messages;

    TQPtrList<DCOPClient::ReplyStruct> pendingReplies;
    TQPtrList<DCOPClient::ReplyStruct> asyncReplyQueue;

    struct LocalTransactionResult 
    {
        TQCString replyType;
        TQByteArray replyData;
    };

    TQIntDict<LocalTransactionResult> localTransActionList;
    
    TQTimer eventLoopTimer;
};

class DCOPClientTransaction
{
public:
    TQ_INT32 id;
    CARD32 key;
    TQCString senderId;
};

TQCString DCOPClient::iceauthPath()
{
#if defined(ICEAUTH_PATH)
    if (
#       if defined(Q_WS_WIN)
        access(ICEAUTH_PATH, 0) == 0
#       else
        access(ICEAUTH_PATH, X_OK) == 0
#       endif
    )
    {
        return TQCString(ICEAUTH_PATH);
    }

#elif defined(Q_OS_WIN32)
	char	szPath[512];
	char *	pszFilePart;
	int		ret;
	ret = SearchPathA(NULL,"iceauth.exe",NULL,sizeof(szPath)/sizeof(szPath[0]),szPath,&pszFilePart);
	if(ret != 0)
		return TQCString(szPath);

#else
    TQCString path = ::getenv("PATH");
    if (path.isEmpty())
        path = "/bin:/usr/bin";
    path += ":/usr/bin/X11:/usr/X11/bin:/usr/X11R6/bin";
    TQCString fPath = strtok(path.data(), ":\b");
    while (!fPath.isNull())
    {
        fPath += "/iceauth";
        if (access(fPath.data(), X_OK) == 0)
        {
            return fPath;
        }
        fPath = strtok(NULL, ":\b");
    }

#endif
    return 0;
}

static TQCString dcopServerFile(const TQCString &hostname, bool old)
{
    TQCString fName = ::getenv("DCOPAUTHORITY");
    if (!old && !fName.isEmpty())
        return fName;

    fName = TQFile::encodeName( TQDir::homeDirPath() );
//    fName = ::getenv("HOME");
    if (fName.isEmpty())
    {
        fprintf(stderr, "Aborting. $HOME is not set.\n");
        exit(1);
    }
#ifdef Q_WS_X11
    TQCString disp = getenv("DISPLAY");
#elif defined(Q_WS_QWS)
    TQCString disp = getenv("QWS_DISPLAY");
#else
    TQCString disp;
#endif
    if (disp.isEmpty())
        disp = "NODISPLAY";

    int i;
    if((i = disp.findRev('.')) > disp.findRev(KPATH_SEPARATOR) && i >= 0)
        disp.truncate(i);

    if (!old)
    {
        while( (i = disp.find(KPATH_SEPARATOR)) >= 0)
            disp[i] = '_';
    }

    fName += "/.DCOPserver_";
    if (hostname.isEmpty())
    {
        char hostName[256];
        hostName[0] = '\0';
        if (getenv("XAUTHLOCALHOSTNAME"))
            fName += getenv("XAUTHLOCALHOSTNAME");
        else if (gethostname(hostName, sizeof(hostName)))
        {
            fName += "localhost";
        }
        else 
        {
            hostName[sizeof(hostName)-1] = '\0';
            fName += hostName;
        }
    }
    else
    {
        fName += hostname;
    }
    fName += "_"+disp;
    return fName;
}


// static
TQCString DCOPClient::dcopServerFile(const TQCString &hostname)
{
    return ::dcopServerFile(hostname, false);
}


// static
TQCString DCOPClient::dcopServerFileOld(const TQCString &hostname)
{
    return ::dcopServerFile(hostname, true);
}


const char* DCOPClientPrivate::serverAddr = 0;

static void DCOPProcessInternal( DCOPClientPrivate *d, int opcode, CARD32 key, const TQByteArray& dataReceived, bool canPost  );

void DCOPClient::handleAsyncReply(ReplyStruct *replyStruct)
{
    if (replyStruct->replyObject)
    {
        TQObject::connect(this, TQT_SIGNAL(callBack(int, const TQCString&, const TQByteArray &)),
               replyStruct->replyObject, replyStruct->replySlot);
        emit callBack(replyStruct->replyId, *(replyStruct->replyType), *(replyStruct->replyData));
        TQObject::disconnect(this, TQT_SIGNAL(callBack(int, const TQCString&, const TQByteArray &)),
               replyStruct->replyObject, replyStruct->replySlot);
    }
    delete replyStruct;
}

/**
 * Callback for ICE.
 */
static void DCOPProcessMessage(IceConn iceConn, IcePointer clientObject,
                        int opcode, unsigned long length, Bool /*swap*/,
                        IceReplyWaitInfo *replyWait,
                        Bool *replyWaitRet)
{
    DCOPMsg *pMsg = 0;
    DCOPClientPrivate *d = static_cast<DCOPClientPrivate *>(clientObject);
    DCOPClient::ReplyStruct *replyStruct = replyWait ? static_cast<DCOPClient::ReplyStruct*>(replyWait->reply) : 0;

    IceReadMessageHeader(iceConn, sizeof(DCOPMsg), DCOPMsg, pMsg);
    CARD32 key = pMsg->key;
    if ( d->key == 0 )
        d->key = key; // received a key from the server

    TQByteArray dataReceived( length );
    IceReadData(iceConn, length, dataReceived.data() );

    d->opcode = opcode;
    switch (opcode ) {

    case DCOPReplyFailed:
        if ( replyStruct ) {
            replyStruct->status = DCOPClient::ReplyStruct::Failed;
            replyStruct->transactionId = 0;
            *replyWaitRet = True;
            return;
        } else {
            tqWarning("Very strange! got a DCOPReplyFailed opcode, but we were not waiting for a reply!");
            return;
        }
    case DCOPReply:
        if ( replyStruct ) {
            TQByteArray* b = replyStruct->replyData;
            TQCString* t =  replyStruct->replyType;
            replyStruct->status = DCOPClient::ReplyStruct::Ok;
            replyStruct->transactionId = 0;

            TQCString calledApp, app;
            TQDataStream ds( dataReceived, IO_ReadOnly );
            ds >> calledApp >> app >> *t >> *b;

            *replyWaitRet = True;
            return;
        } else {
            tqWarning("Very strange! got a DCOPReply opcode, but we were not waiting for a reply!");
            return;
        }
    case DCOPReplyWait:
        if ( replyStruct ) {
            TQCString calledApp, app;
            TQ_INT32 id;
            TQDataStream ds( dataReceived, IO_ReadOnly );
            ds >> calledApp >> app >> id;
            replyStruct->transactionId = id;
            replyStruct->calledApp = calledApp;
            d->pendingReplies.append(replyStruct);
            *replyWaitRet = True;
            return;
        } else {
            tqWarning("Very strange! got a DCOPReplyWait opcode, but we were not waiting for a reply!");
            return;
        }
    case DCOPReplyDelayed:
        {
            TQDataStream ds( dataReceived, IO_ReadOnly );
            TQCString calledApp, app;
            TQ_INT32 id;

            ds >> calledApp >> app >> id;
            if (replyStruct && (id == replyStruct->transactionId) && (calledApp == replyStruct->calledApp))
            {
                *replyWaitRet = True;
            }

            for(DCOPClient::ReplyStruct *rs = d->pendingReplies.first(); rs; 
                rs = d->pendingReplies.next())
            {
                if ((rs->transactionId == id) && (rs->calledApp == calledApp))
                {
                    d->pendingReplies.remove();
                    TQByteArray* b = rs->replyData;
                    TQCString* t =  rs->replyType;
                    ds >> *t >> *b;

                    rs->status = DCOPClient::ReplyStruct::Ok;
                    rs->transactionId = 0;
                    if (!rs->replySlot.isEmpty())
                    {
                        d->parent->handleAsyncReply(rs);
                    }
                    return;
                }
            }
            tqWarning("Very strange! got a DCOPReplyDelayed opcode, but we were not waiting for a reply!");
            return;
        }
    case DCOPCall:
    case DCOPFind:
    case DCOPSend:
        DCOPProcessInternal( d, opcode, key, dataReceived, true );
    }
}

void DCOPClient::processPostedMessagesInternal()
{
    if ( d->messages.isEmpty() )
        return;
    TQPtrListIterator<DCOPClientMessage> it (d->messages );
    DCOPClientMessage* msg ;
    while ( ( msg = it.current() ) ) {
        ++it;
        if ( d->currentKey && msg->key != d->currentKey )
            continue;
        d->messages.removeRef( msg );
        d->opcode = msg->opcode;
        DCOPProcessInternal( d, msg->opcode, msg->key, msg->data, false );
        delete msg;
    }
    if ( !d->messages.isEmpty() )
        d->postMessageTimer.start( 100, true );
}

/**
   Processes DCOPCall, DCOPFind and DCOPSend
 */
void DCOPProcessInternal( DCOPClientPrivate *d, int opcode, CARD32 key, const TQByteArray& dataReceived, bool canPost  )
{
    if (!d->accept_calls && (opcode == DCOPSend))
        return;

    IceConn iceConn = d->iceConn;
    DCOPMsg *pMsg = 0;
    DCOPClient *c = d->parent;
    TQDataStream ds( dataReceived, IO_ReadOnly );

    TQCString fromApp;
    ds >> fromApp;
    if (fromApp.isEmpty())
        return; // Reserved for local calls

    if (!d->accept_calls)
    {
        TQByteArray reply;
        TQDataStream replyStream( reply, IO_WriteOnly );
        // Call rejected.
        replyStream << d->appId << fromApp;
        IceGetHeader( iceConn, d->majorOpcode, DCOPReplyFailed,
                      sizeof(DCOPMsg), DCOPMsg, pMsg );
        int datalen = reply.size();
        pMsg->key = key;
        pMsg->length += datalen;
        IceSendData( iceConn, datalen, reply.data());
        return;
    }

    TQCString app, objId, fun;
    TQByteArray data;
    ds >> app >> objId >> fun >> data;
    d->senderId = fromApp;
    d->objId = objId;
    d->function = fun;

// tqWarning("DCOP: %s got call: %s:%s:%s key = %d currentKey = %d", d->appId.data(), app.data(), objId.data(), fun.data(), key, d->currentKey);

    if ( canPost && d->currentKey && key != d->currentKey ) {
        DCOPClientMessage* msg = new DCOPClientMessage;
        msg->opcode = opcode;
        msg->key = key;
        msg->data = dataReceived;
        d->messages.append( msg );
        d->postMessageTimer.start( 0, true );
        return;
    }

    d->objId = objId;
    d->function = fun;

    TQCString replyType;
    TQByteArray replyData;
    bool b;
    CARD32 oldCurrentKey = d->currentKey;
    if ( opcode != DCOPSend ) // DCOPSend doesn't change the current key
        d->currentKey = key;

    if ( opcode == DCOPFind )
        b = c->find(app, objId, fun, data, replyType, replyData );
    else
        b = c->receive( app, objId, fun, data, replyType, replyData );
    // set notifier back to previous state

    if ( opcode == DCOPSend )
        return;

    if ((d->currentKey == key) || (oldCurrentKey != 2))
        d->currentKey = oldCurrentKey;

    TQByteArray reply;
    TQDataStream replyStream( reply, IO_WriteOnly );

    TQ_INT32 id = c->transactionId();
    if (id) {
        // Call delayed. Send back the transaction ID.
        replyStream << d->appId << fromApp << id;

        IceGetHeader( iceConn, d->majorOpcode, DCOPReplyWait,
                      sizeof(DCOPMsg), DCOPMsg, pMsg );
        pMsg->key = key;
        pMsg->length += reply.size();
        IceSendData( iceConn, reply.size(), const_cast<char *>(reply.data()));
        return;
    }

    if ( !b )        {
        // Call failed. No data send back.

        replyStream << d->appId << fromApp;
        IceGetHeader( iceConn, d->majorOpcode, DCOPReplyFailed,
                      sizeof(DCOPMsg), DCOPMsg, pMsg );
        int datalen = reply.size();
        pMsg->key = key;
        pMsg->length += datalen;
        IceSendData( iceConn, datalen, const_cast<char *>(reply.data()));
        return;
    }

    // Call successful. Send back replyType and replyData.
    replyStream << d->appId << fromApp << replyType << replyData.size();


    // we are calling, so we need to set up reply data
    IceGetHeader( iceConn, d->majorOpcode, DCOPReply,
                  sizeof(DCOPMsg), DCOPMsg, pMsg );
    int datalen = reply.size() + replyData.size();
    pMsg->key = key;
    pMsg->length += datalen;
    // use IceSendData not IceWriteData to avoid a copy.  Output buffer
    // shouldn't need to be flushed.
    IceSendData( iceConn, reply.size(), const_cast<char *>(reply.data()));
    IceSendData( iceConn, replyData.size(), const_cast<char *>(replyData.data()));
}



static IcePoVersionRec DCOPClientVersions[] = {
    { DCOPVersionMajor, DCOPVersionMinor,  DCOPProcessMessage }
};


static DCOPClient* dcop_main_client = 0;

DCOPClient* DCOPClient::mainClient()
{
    return dcop_main_client;
}

void DCOPClient::setMainClient( DCOPClient* client )
{
    dcop_main_client = client;
}


DCOPClient::DCOPClient()
{
    d = new DCOPClientPrivate;
    d->parent = this;
    d->iceConn = 0L;
    d->key = 0;
    d->currentKey = 0;
    d->majorOpcode = 0;
    d->appId = 0;
    d->notifier = 0L;
    d->non_blocking_call_lock = false;
    d->registered = false;
    d->foreign_server = true;
    d->accept_calls = true;
    d->accept_calls_override = false;
    d->qt_bridge_enabled = true;
    d->transactionList = 0L;
    d->transactionId = 0;
    TQObject::connect( &d->postMessageTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( processPostedMessagesInternal() ) );
    TQObject::connect( &d->eventLoopTimer, TQT_SIGNAL( timeout() ), this, TQT_SLOT( eventLoopTimeout() ) );

    if ( !mainClient() )
        setMainClient( this );
}

DCOPClient::~DCOPClient()
{
#ifdef DCOPCLIENT_DEBUG
    tqWarning("d->messages.count() = %d", d->messages.count());
    TQPtrListIterator<DCOPClientMessage> it (d->messages );
    DCOPClientMessage* msg ;
    while ( ( msg = it.current() ) ) {
        ++it;
        d->messages.removeRef( msg );
        tqWarning("DROPPING UNHANDLED DCOP MESSAGE:");
        tqWarning("         opcode = %d key = %d", msg->opcode, msg->key);
        TQDataStream ds( msg->data, IO_ReadOnly );

        TQCString fromApp, app, objId, fun;
        ds >> fromApp >> app >> objId >> fun;
        tqWarning("         from = %s", fromApp.data()); 
        tqWarning("         to = %s / %s / %s", app.data(), objId.data(), fun.data());
        delete msg;
    }
#endif
    if (d->iceConn)
        if (IceConnectionStatus(d->iceConn) == IceConnectAccepted)
            detach();

    if (d->registered)
        unregisterLocalClient( d->appId );

    delete d->notifier;
    delete d->transactionList;
    d->messages.setAutoDelete(true);
    delete d;

    if ( mainClient() == this )
        setMainClient( 0 );
}

void DCOPClient::setServerAddress(const TQCString &addr)
{
    TQCString env = "DCOPSERVER=" + addr;
    putenv(strdup(env.data()));
    delete [] DCOPClientPrivate::serverAddr;
    DCOPClientPrivate::serverAddr = tqstrdup( addr.data() );
}

bool DCOPClient::attach()
{
    if (!attachInternal( true ))
       if (!attachInternal( true ))
          return false; // Try two times!
    return true;
}

void DCOPClient::bindToApp()
{
    // check if we have a tqApp instantiated.  If we do,
    // we can create a TQSocketNotifier and use it for receiving data.
    if (tqApp) {
        if ( d->notifier )
            delete d->notifier;
        d->notifier = new TQSocketNotifier(socket(),
                                          TQSocketNotifier::Read, 0, 0);
        TQObject::connect(d->notifier, TQT_SIGNAL(activated(int)),
                TQT_SLOT(processSocketData(int)));
    }
}

void DCOPClient::suspend()
{
#ifdef Q_WS_WIN //TODO: remove (win32 ports sometimes do not create notifiers)
    if (!d->notifier)
        return;
#endif
    assert(d->notifier); // Suspending makes no sense if we didn't had a tqApp yet
    d->notifier->setEnabled(false);
}

void DCOPClient::resume()
{
#ifdef Q_WS_WIN //TODO: remove
    if (!d->notifier)
        return;
#endif
    assert(d->notifier); // Should never happen
    d->notifier->setEnabled(true);
}

bool DCOPClient::isSuspended() const
{
#if defined(Q_WS_WIN) || defined(Q_WS_MAC) //TODO: REMOVE
    if (!d->notifier)
        return false;
#endif
    return !d->notifier->isEnabled();
}

#if defined(SO_PEERCRED) || defined(LOCAL_PEEREID) || defined(HAVE_GETPEERUCRED)
#define USE_PEER_IS_US
// Check whether the remote end is owned by the same user.
static bool peerIsUs(int sockfd)
{
#ifdef SO_PEERCRED
#if defined(__OpenBSD__)
    struct sockpeercred cred;
#else
    struct ucred cred;
#endif
    socklen_t siz = sizeof(cred);
    if (getsockopt(sockfd, SOL_SOCKET, SO_PEERCRED, &cred, &siz) != 0)
        return false;
    return (cred.uid == getuid());
#elif defined LOCAL_PEEREID
    struct unpcbid cred;
    socklen_t siz = sizeof(cred);
    if (getsockopt(sockfd, 0, LOCAL_PEEREID, &cred, &siz) != 0 || siz != sizeof(cred))
        return false;
    return (cred.unp_euid == geteuid());
#elif defined(HAVE_GETPEERUCRED)
    ucred_t *cred = nullptr;
    uint_t peer_uid;

    if (getpeerucred(sockfd, &cred) != 0) {
        if (cred != nullptr)
            ucred_free(cred);
        return false;
    }
    peer_uid = ucred_geteuid(cred);
    ucred_free(cred);
    return (peer_uid == getuid());
#endif
}
#else
// Check whether the socket is owned by the same user.
static bool isServerSocketOwnedByUser(const char*server)
{
#ifdef Q_OS_WIN
    if (strncmp(server, "tcp/", 4) != 0)
        return false; // Not a local socket -> foreign.
	else
		return true;
#else
    if (strncmp(server, "local/", 6) != 0)
        return false; // Not a local socket -> foreign.
    const char *path = strchr(server, KPATH_SEPARATOR);
    if (!path)
        return false;
    path++;

    struct stat stat_buf;
    if (stat(path, &stat_buf) != 0)
        return false;

    return (stat_buf.st_uid == getuid());
#endif
}
#endif


bool DCOPClient::attachInternal( bool registerAsAnonymous )
{
    char errBuf[1024];

    if ( isAttached() )
        detach();

    if ((d->majorOpcode = IceRegisterForProtocolSetup(const_cast<char *>("DCOP"),
                                                      const_cast<char *>(DCOPVendorString),
                                                      const_cast<char *>(DCOPReleaseString),
                                                      1, DCOPClientVersions,
                                                      DCOPAuthCount,
                                                      const_cast<char **>(DCOPAuthNames),
                                                      DCOPClientAuthProcs, 0L)) < 0) {
        emit attachFailed(TQString::fromLatin1( "Communications could not be established." ));
        return false;
    }

    bool bClearServerAddr = false;
    // first, check if serverAddr was ever set.
    if (!d->serverAddr) {
        // here, we obtain the list of possible DCOP connections,
        // and attach to them.
        TQCString dcopSrv;
        dcopSrv = ::getenv("DCOPSERVER");
        if (dcopSrv.isEmpty()) {
            TQCString fName = dcopServerFile();
            TQFile f(TQFile::decodeName(fName));
            if (!f.open(IO_ReadOnly)) {
                emit attachFailed(TQString::fromLatin1( "Could not read network connection list.\n" )+TQFile::decodeName(fName));
                return false;
            }
            int size = TQMIN( (long)1024, f.size() ); // protection against a huge file
            TQCString contents( size+1 );
            if ( f.readBlock( contents.data(), size ) != size )
            {
               tqDebug("Error reading from %s, didn't read the expected %d bytes", fName.data(), size);
               // Should we abort ?
            }
            contents[size] = '\0';
            int pos = contents.find('\n');
            if ( pos == -1 ) // Shouldn't happen
            {
                tqDebug("Only one line in dcopserver file !: %s", contents.data());
                dcopSrv = contents;
            }
            else
            {
				if(contents[pos - 1] == '\r')	// check for windows end of line
					pos--;
                dcopSrv = contents.left( pos );
//#ifndef NDEBUG
//                tqDebug("dcopserver address: %s", dcopSrv.data());
//#endif
            }
        }
        d->serverAddr = tqstrdup( const_cast<char *>(dcopSrv.data()) );
        bClearServerAddr = true;
    }

    if ((d->iceConn = IceOpenConnection(const_cast<char*>(d->serverAddr),
                                        static_cast<IcePointer>(this), False, d->majorOpcode,
                                        sizeof(errBuf), errBuf)) == 0L) {
        tqDebug("DCOPClient::attachInternal. Attach failed %s", errBuf);
        d->iceConn = 0;
        if (bClearServerAddr) {
           delete [] d->serverAddr;
           d->serverAddr = 0;
        }
        emit attachFailed(TQString::fromLatin1( errBuf ));
        return false;
    }
    fcntl(socket(), F_SETFL, FD_CLOEXEC);

    IceSetShutdownNegotiation(d->iceConn, False);

    int setupstat;
    char* vendor = 0;
    char* release = 0;
    setupstat = IceProtocolSetup(d->iceConn, d->majorOpcode,
                                 static_cast<IcePointer>(d),
                                 False, /* must authenticate */
                                 &(d->majorVersion), &(d->minorVersion),
                                 &(vendor), &(release), 1024, errBuf);
    if (vendor) free(vendor);
    if (release) free(release);

    if (setupstat == IceProtocolSetupFailure ||
        setupstat == IceProtocolSetupIOError) {
        IceCloseConnection(d->iceConn);
        d->iceConn = 0;
        if (bClearServerAddr) {
            delete [] d->serverAddr;
            d->serverAddr = 0;
        }
        emit attachFailed(TQString::fromLatin1( errBuf ));
        return false;
    } else if (setupstat == IceProtocolAlreadyActive) {
        if (bClearServerAddr) {
            delete [] d->serverAddr;
            d->serverAddr = 0;
        }
        /* should not happen because 3rd arg to IceOpenConnection was 0. */
        emit attachFailed(TQString::fromLatin1( "internal error in IceOpenConnection" ));
        return false;
    }


    if (IceConnectionStatus(d->iceConn) != IceConnectAccepted) {
        if (bClearServerAddr) {
            delete [] d->serverAddr;
            d->serverAddr = 0;
        }
        emit attachFailed(TQString::fromLatin1( "DCOP server did not accept the connection." ));
        return false;
    }

#ifdef USE_PEER_IS_US
    d->foreign_server = !peerIsUs(socket());
#else
    d->foreign_server = !isServerSocketOwnedByUser(d->serverAddr);
#endif
    if (!d->accept_calls_override)
        d->accept_calls = !d->foreign_server;

    bindToApp();

    if ( registerAsAnonymous )
        registerAs( "anonymous", true );

    return true;
}


bool DCOPClient::detach()
{
    int status;

    if (d->iceConn) {
        IceProtocolShutdown(d->iceConn, d->majorOpcode);
        status = IceCloseConnection(d->iceConn);
        if (status != IceClosedNow)
            return false;
        else
            d->iceConn = 0L;
    }

    if (d->registered)
        unregisterLocalClient(d->appId);

    delete d->notifier;
    d->notifier = 0L;
    d->registered = false;
    d->foreign_server = true;
    return true;
}

bool DCOPClient::isAttached() const
{
    if (!d->iceConn)
        return false;

    return (IceConnectionStatus(d->iceConn) == IceConnectAccepted);
}

bool DCOPClient::isAttachedToForeignServer() const
{
    return isAttached() && d->foreign_server;
}

bool DCOPClient::acceptCalls() const
{
    return isAttached() && d->accept_calls;
}

void DCOPClient::setAcceptCalls(bool b)
{
    d->accept_calls = b;
    d->accept_calls_override = true;
}

bool DCOPClient::qtBridgeEnabled()
{
    return d->qt_bridge_enabled;
}

void DCOPClient::setQtBridgeEnabled(bool b)
{
    d->qt_bridge_enabled = b;
}

TQCString DCOPClient::registerAs( const TQCString &appId, bool addPID )
{
    TQCString result;

    TQCString _appId = appId;

    if (addPID) {
        TQCString pid;
        pid.sprintf("-%d", getpid());
        _appId = _appId + pid;
    }

    if( d->appId == _appId )
        return d->appId;

#if 0 // no need to detach, dcopserver can handle renaming
    // Detach before reregistering.
    if ( isRegistered() ) {
        detach();
    }
#endif

    if ( !isAttached() ) {
        if (!attachInternal( false ))
            if (!attachInternal( false ))
                return result; // Try two times
    }

    // register the application identifier with the server
    TQCString replyType;
    TQByteArray data, replyData;
    TQDataStream arg( data, IO_WriteOnly );
    arg << _appId;
    if ( call( "DCOPServer", "", "registerAs(TQCString)", data, replyType, replyData ) ) {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
    }

    d->appId = result;
    d->registered = !result.isNull();

    if (d->registered)
        registerLocalClient( d->appId, this );

    return result;
}

bool DCOPClient::isRegistered() const
{
    return d->registered;
}


TQCString DCOPClient::appId() const
{
    return d->appId;
}


int DCOPClient::socket() const
{
    if (d->iceConn)
        return IceConnectionNumber(d->iceConn);
    return 0;
}

static inline bool isIdentChar( char x )
{                                                // Avoid bug in isalnum
    return x == '_' || (x >= '0' && x <= '9') ||
         (x >= 'a' && x <= 'z') || (x >= 'A' && x <= 'Z');
}

TQCString DCOPClient::normalizeFunctionSignature( const TQCString& fun ) {
    if ( fun.isEmpty() )                                // nothing to do
        return fun.copy();
    TQCString result( fun.size() );
    char *from        = const_cast<TQCString&>(fun).data();
    char *to        = result.data();
    char *first = to;
    char last = 0;
    while ( true ) {
        while ( *from && isspace(*from) )
            from++;
        if ( last && isIdentChar( last ) && isIdentChar( *from ) )
            *to++ = 0x20;
        while ( *from && !isspace(*from) ) {
            last = *from++;
            *to++ = last;
        }
        if ( !*from )
            break;
    }
    if ( to > first && *(to-1) == 0x20 )
        to--;
    *to = '\0';
    result.resize( (int)((long)to - (long)result.data()) + 1 );
    return result;
}


TQCString DCOPClient::senderId() const
{
    return d->senderId;
}


bool DCOPClient::send(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data)
{
    if (remApp.isEmpty())
       return false;
    DCOPClient *localClient = findLocalClient( remApp );

    if ( localClient  ) {
        bool saveTransaction = d->transaction;
        TQ_INT32 saveTransactionId = d->transactionId;
        TQCString saveSenderId = d->senderId;

        d->senderId = 0; // Local call
        TQCString replyType;
        TQByteArray replyData;
        (void) localClient->receive(  remApp, remObjId, remFun, data, replyType, replyData );

        d->transaction = saveTransaction;
        d->transactionId = saveTransactionId;
        d->senderId = saveSenderId;
        // send() returns true if the data could be send to the DCOPServer,
        // regardles of receiving the data on the other application.
        // So we assume the data is successfully send to the (virtual) server
        // and return true in any case.
        return true;
    }

    if ( !isAttached() )
        return false;


    DCOPMsg *pMsg;

    TQByteArray ba;
    TQDataStream ds(ba, IO_WriteOnly);
    ds << d->appId << remApp << remObjId << normalizeFunctionSignature(remFun) << data.size();

    IceGetHeader(d->iceConn, d->majorOpcode, DCOPSend,
                 sizeof(DCOPMsg), DCOPMsg, pMsg);

    pMsg->key = 1; // DCOPSend always uses the magic key 1
    int datalen = ba.size() + data.size();
    pMsg->length += datalen;

    IceSendData( d->iceConn, ba.size(), const_cast<char *>(ba.data()) );
    IceSendData( d->iceConn, data.size(), const_cast<char *>(data.data()) );

    //IceFlush(d->iceConn);

    if (IceConnectionStatus(d->iceConn) == IceConnectAccepted)
        return true;
    return false;
}

bool DCOPClient::send(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQString &data)
{
    TQByteArray ba;
    TQDataStream ds(ba, IO_WriteOnly);
    ds << data;
    return send(remApp, remObjId, remFun, ba);
}

bool DCOPClient::findObject(const TQCString &remApp, const TQCString &remObj,
                            const TQCString &remFun, const TQByteArray &data,
                            TQCString &foundApp, TQCString &foundObj,
                            bool useEventLoop)
{
    return findObject( remApp, remObj, remFun, data, foundApp, foundObj, useEventLoop, -1 );
}

bool DCOPClient::findObject(const TQCString &remApp, const TQCString &remObj,
                            const TQCString &remFun, const TQByteArray &data,
                            TQCString &foundApp, TQCString &foundObj,
                            bool useEventLoop, int timeout)
{
    QCStringList appList;
    TQCString app = remApp;
    if (app.isEmpty())
        app = "*";

    foundApp = 0;
    foundObj = 0;

    if (app[app.length()-1] == '*')
    {
        // Find all apps that match 'app'.
        // NOTE: It would be more efficient to do the filtering in
        // the dcopserver itself.
        int len = app.length()-1;
        QCStringList apps=registeredApplications();
        for( QCStringList::ConstIterator it = apps.begin();
            it != apps.end();
            ++it)
        {
            if ( strncmp( (*it).data(), app.data(), len) == 0)
                appList.append(*it);
        }
    }
    else
    {
        appList.append(app);
    }

    // We do all the local clients in phase1 and the rest in phase2
    for(int phase=1; phase <= 2; phase++)
    {
      for( QCStringList::ConstIterator it = appList.begin();
           it != appList.end();
           ++it)
      {
        TQCString remApp = *it;
        TQCString replyType;
        TQByteArray replyData;
        bool result = false;
        DCOPClient *localClient = findLocalClient( remApp );

        if ( (phase == 1) && localClient ) {
            // In phase 1 we do all local clients
            bool saveTransaction = d->transaction;
            TQ_INT32 saveTransactionId = d->transactionId;
            TQCString saveSenderId = d->senderId;

            d->senderId = 0; // Local call
            result = localClient->find(  remApp, remObj, remFun, data, replyType, replyData );

            TQ_INT32 id = localClient->transactionId();
            if (id) {
                // Call delayed. We have to wait till it has been processed.
                do {
                    TQApplication::eventLoop()->processEvents( TQEventLoop::WaitForMore);
                } while( !localClient->isLocalTransactionFinished(id, replyType, replyData));
                result = true;
            }
            d->transaction = saveTransaction;
            d->transactionId = saveTransactionId;
            d->senderId = saveSenderId;
        }
        else if ((phase == 2) && !localClient)
        {
            // In phase 2 we do the other clients
            result = callInternal(remApp, remObj, remFun, data,
                     replyType, replyData, useEventLoop, timeout, DCOPFind);
        }

        if (result)
        {
            if (replyType == "DCOPRef")
            {
                DCOPRef ref;
                TQDataStream reply( replyData, IO_ReadOnly );
                reply >> ref;

                if (ref.app() == remApp) // Consistency check
                {
                    // replyType contains objId.
                    foundApp = ref.app();
                    foundObj = ref.object();
                    return true;
                }
            }
        }
      }
    }
    return false;
}

bool DCOPClient::process(const TQCString &, const TQByteArray &,
                         TQCString&, TQByteArray &)
{
    return false;
}

bool DCOPClient::isApplicationRegistered( const TQCString& remApp)
{
    TQCString replyType;
    TQByteArray data, replyData;
    TQDataStream arg( data, IO_WriteOnly );
    arg << remApp;
    int result = false;
    if ( call( "DCOPServer", "", "isApplicationRegistered(TQCString)", data, replyType, replyData ) ) {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
    }
    return result;
}

QCStringList DCOPClient::registeredApplications()
{
    TQCString replyType;
    TQByteArray data, replyData;
    QCStringList result;
    if ( call( "DCOPServer", "", "registeredApplications()", data, replyType, replyData ) ) {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
    }
    return result;
}

QCStringList DCOPClient::remoteObjects( const TQCString& remApp, bool *ok )
{
    TQCString replyType;
    TQByteArray data, replyData;
    QCStringList result;
    if ( ok )
        *ok = false;
    if ( call( remApp, "DCOPClient", "objects()", data, replyType, replyData ) ) {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
        if ( ok )
            *ok = true;
    }
    return result;
}

QCStringList DCOPClient::remoteInterfaces( const TQCString& remApp, const TQCString& remObj, bool *ok  )
{
    TQCString replyType;
    TQByteArray data, replyData;
    QCStringList result;
    if ( ok )
        *ok = false;
    if ( call( remApp, remObj, "interfaces()", data, replyType, replyData ) && replyType == "QCStringList") {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
        if ( ok )
            *ok = true;
    }
    return result;
}

QCStringList DCOPClient::remoteFunctions( const TQCString& remApp, const TQCString& remObj, bool *ok  )
{
    TQCString replyType;
    TQByteArray data, replyData;
    QCStringList result;
    if ( ok )
        *ok = false;
    if ( call( remApp, remObj, "functions()", data, replyType, replyData ) && replyType == "QCStringList") {
        TQDataStream reply( replyData, IO_ReadOnly );
        reply >> result;
        if ( ok )
            *ok = true;
    }
    return result;
}

void DCOPClient::setNotifications(bool enabled)
{
    TQByteArray data;
    TQDataStream ds(data, IO_WriteOnly);
    ds << static_cast<TQ_INT8>(enabled);

    TQCString replyType;
    TQByteArray reply;
    if (!call("DCOPServer", "", "setNotifications( bool )", data, replyType, reply))
        tqWarning("I couldn't enable notifications at the dcopserver!");
}

void DCOPClient::setDaemonMode( bool daemonMode )
{
    TQByteArray data;
    TQDataStream ds(data, IO_WriteOnly);
    ds << static_cast<TQ_INT8>( daemonMode );

    TQCString replyType;
    TQByteArray reply;
    if (!call("DCOPServer", "", "setDaemonMode(bool)", data, replyType, reply))
        tqWarning("I couldn't enable daemon mode at the dcopserver!");
}



/*
  DCOP <-> Qt bridge

  ********************************************************************************
 */
static void fillQtObjects( QCStringList& l, TQObject* o, TQCString path )
{
    if ( !path.isEmpty() )
        path += '/';

    int unnamed = 0;
    const TQObjectList list = o ? o->childrenListObject() : TQObject::objectTreesListObject();
    if ( !list.isEmpty() ) {
        TQObjectListIt it( list );
        TQObject *obj;
        while ( (obj=it.current()) ) {
            ++it;
             TQCString n = obj->name();
             if ( n == "unnamed" || n.isEmpty() )
             {
                 n.sprintf("%p", (void *) obj);
                 n = TQString(TQString("unnamed%1(%2, %3)").arg(++unnamed).arg(obj->className()).arg(TQString(n))).latin1();
             }
             TQCString fn = path + n;
             l.append( fn );
             if ( !obj->childrenListObject().isEmpty() )
                 fillQtObjects( l, obj, fn );
        }
    }
}

namespace
{
struct O
{
    O(): o(0) {}
    O ( const TQCString& str, TQObject* obj ):s(str), o(obj){}
    TQCString s;
    TQObject* o;
};
} // namespace

static void fillQtObjectsEx( TQValueList<O>& l, TQObject* o, TQCString path )
{
    if ( !path.isEmpty() )
        path += '/';

    int unnamed = 0;
    const TQObjectList list = o ? o->childrenListObject() : TQObject::objectTreesListObject();
    if ( !list.isEmpty() ) {
        TQObjectListIt it( list );
        TQObject *obj;
        while ( (obj=it.current()) ) {
            ++it;
            TQCString n = obj->name();
            if ( n == "unnamed" || n.isEmpty() )
             {
                 n.sprintf("%p", (void *) obj);
                 n = TQString(TQString("unnamed%1(%2, %3)").arg(++unnamed).arg(obj->className()).arg(TQString(n))).latin1();
             }
            TQCString fn = path + n;
            l.append( O( fn, obj ) );
            if ( !obj->childrenListObject().isEmpty() )
                fillQtObjectsEx( l, obj, fn );
        }
    }
}


static TQObject* findQtObject( TQCString id )
{
    TQRegExp expr( id );
    TQValueList<O> l;
    fillQtObjectsEx( l, 0, "qt" );
    // Prefer an exact match, but fall-back on the first that contains the substring
    TQObject* firstContains = 0L;
    for ( TQValueList<O>::ConstIterator it = l.begin(); it != l.end(); ++it ) {
        if ( (*it).s == id ) // exact match
            return (*it).o;
        if ( !firstContains && (*it).s.contains( expr ) ) {
            firstContains = (*it).o;
        }
    }
    return firstContains;
}

static QCStringList  findQtObjects( TQCString id )
{
    TQRegExp expr( id );
    TQValueList<O> l;
    fillQtObjectsEx( l, 0, "qt" );
    QCStringList result;
    for ( TQValueList<O>::ConstIterator it = l.begin(); it != l.end(); ++it ) {
        if ( (*it).s.contains( expr ) )
            result << (*it).s;
    }
    return result;
}

static bool receiveQtObject( const TQCString &objId, const TQCString &fun, const TQByteArray &data,
                            TQCString& replyType, TQByteArray &replyData)
{
    if  ( objId == "qt" ) {
        if ( fun == "interfaces()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            l << "DCOPObject";
            l << "Qt";
            reply << l;
            return true;
        } else if ( fun == "functions()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            l << "QCStringList functions()";
            l << "QCStringList interfaces()";
            l << "QCStringList objects()";
            l << "QCStringList find(TQCString)";
            reply << l;
            return true;
        } else if ( fun == "objects()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            fillQtObjects( l, 0, "qt" );
            reply << l;
            return true;
        } else if ( fun == "find(TQCString)" ) {
            TQDataStream ds( data, IO_ReadOnly );
            TQCString id;
            ds >> id ;
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            reply << findQtObjects( id ) ;
            return true;
        }
    } else if ( objId.left(3) == "qt/" ) {
        TQObject* o = findQtObject( objId );
        if ( !o )
            return false;
        if ( fun == "functions()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            l << "QCStringList functions()";
            l << "QCStringList interfaces()";
            l << "QCStringList properties()";
            l << "bool setProperty(TQCString,TQVariant)";
            l << "TQVariant property(TQCString)";
            TQStrList lst = o->metaObject()->slotNames( true );
            int i = 0;
            for ( TQPtrListIterator<char> it( lst ); it.current(); ++it ) {
                if ( o->metaObject()->slot( i++, true )->access != TQMetaData::Public )
                    continue;
                TQCString slot = it.current();
                if ( slot.contains( "()" ) ) {
                    slot.prepend("void ");
                    l <<  slot;
                }
            }
            reply << l;
            return true;
        } else if ( fun == "interfaces()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            TQMetaObject *meta = o->metaObject();
            while ( meta ) {
                l.prepend( meta->className() );
                meta = meta->superClass();
            }
            reply << l;
            return true;
        } else if ( fun == "properties()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            TQStrList lst = o->metaObject()->propertyNames( true );
            for ( TQPtrListIterator<char> it( lst ); it.current(); ++it ) {
                TQMetaObject *mo = o->metaObject();
                const TQMetaProperty* p = mo->property( mo->findProperty( it.current(), true ), true );
                if ( !p )
                    continue;
                TQCString prop = p->type();
                prop += ' ';
                prop += p->name();
                if ( !p->writable() )
                    prop += " readonly";
                l << prop;
            }
            reply << l;
            return true;
        } else if ( fun == "property(TQCString)" ) {
            replyType = "TQVariant";
            TQDataStream ds( data, IO_ReadOnly );
            TQCString name;
            ds >> name ;
            TQVariant result = o->property(  name );
            TQDataStream reply( replyData, IO_WriteOnly );
            reply << result;
            return true;
        } else if ( fun == "setProperty(TQCString,TQVariant)" ) {
            TQDataStream ds( data, IO_ReadOnly );
            TQCString name;
            TQVariant value;
            ds >> name >> value;
            replyType = "bool";
            TQDataStream reply( replyData, IO_WriteOnly );
            reply << (TQ_INT8) o->setProperty( name, value );
            return true;
        } else {
            int slot = o->metaObject()->findSlot( fun, true );
            if ( slot != -1 ) {
                replyType = "void";
                TQUObject uo[ 1 ];
                o->tqt_invoke( slot, uo );
                return true;
            }
        }


    }
    return false;
}


/*
  ********************************************************************************
  End of DCOP <-> Qt bridge
 */


bool DCOPClient::receive(const TQCString &/*app*/, const TQCString &objId,
                         const TQCString &fun, const TQByteArray &data,
                         TQCString& replyType, TQByteArray &replyData)
{
    d->transaction = false; // Assume no transaction.
    if ( objId == "DCOPClient" ) {
        if ( fun == "objects()" ) {
            replyType = "QCStringList";
            TQDataStream reply( replyData, IO_WriteOnly );
            QCStringList l;
            if (d->qt_bridge_enabled)
            {
               l << "qt"; // the Qt bridge object
            }
            if ( kde_dcopObjMap ) {
                TQMap<TQCString, DCOPObject *>::ConstIterator it( kde_dcopObjMap->begin());
                for (; it != kde_dcopObjMap->end(); ++it) {
                    if ( !it.key().isEmpty() ) {
                        if ( it.key() == d->defaultObject )
                            l << "default";
                        l << it.key();
                    }
                }
            }
            reply << l;
            return true;
        }
    }

    if ( objId.isEmpty() || objId == "DCOPClient" ) {
        if ( fun == "applicationRegistered(TQCString)" ) {
            TQDataStream ds( data, IO_ReadOnly );
            TQCString r;
            ds >> r;
            emit applicationRegistered( r );
            return true;
        } else if ( fun == "applicationRemoved(TQCString)" ) {
            TQDataStream ds( data, IO_ReadOnly );
            TQCString r;
            ds >> r;
            emit applicationRemoved( r );
            return true;
        }

        if ( process( fun, data, replyType, replyData ) )
            return true;
        // fall through and send to defaultObject if available

    } else if (d->qt_bridge_enabled &&
               (objId == "qt" || objId.left(3) == "qt/") ) { // dcop <-> qt bridge
        return receiveQtObject( objId, fun, data, replyType, replyData );
    }

    if ( objId.isEmpty() || objId == "default" ) {
        if ( !d->defaultObject.isEmpty() && DCOPObject::hasObject( d->defaultObject ) ) {
            DCOPObject *objPtr = DCOPObject::find( d->defaultObject );
            objPtr->setCallingDcopClient(this);
            if (objPtr->process(fun, data, replyType, replyData))
                return true;
        }

        // fall through and send to object proxies
    }

//     if (!objId.isEmpty() && objId[objId.length()-1] == '*') {
    if (!objId.isEmpty() && ((objId.length()>0)?(objId[objId.length()-1] == '*'):0)) {
        // handle a multicast to several objects.
        // doesn't handle proxies currently.  should it?
        TQPtrList<DCOPObject> matchList =
            DCOPObject::match(objId.left(objId.length()-1));
        for (DCOPObject *objPtr = matchList.first();
             objPtr != 0L; objPtr = matchList.next()) {
            objPtr->setCallingDcopClient(this);
            if (!objPtr->process(fun, data, replyType, replyData))
                return false;
        }
        return true;
    } else if (!DCOPObject::hasObject(objId)) {
        if ( DCOPObjectProxy::proxies ) {
            for ( TQPtrListIterator<DCOPObjectProxy> it( *DCOPObjectProxy::proxies ); it.current();  ++it ) {
                // TODO: it.current()->setCallingDcopClient(this);
                if ( it.current()->process( objId, fun, data, replyType, replyData ) )
                    return true;
            }
        }
        return false;

    } else {
        DCOPObject *objPtr = DCOPObject::find(objId);
        objPtr->setCallingDcopClient(this);
        if (!objPtr->process(fun, data, replyType, replyData)) {
            // obj doesn't understand function or some other error.
            return false;
        }
    }

    return true;
}

// Check if the function result is a bool with the value "true"
// If so set the function result to DCOPRef pointing to (app,objId) and
// return true. Return false otherwise.
static bool findResultOk(TQCString &replyType, TQByteArray &replyData)
{
    TQ_INT8 success; // Tsk.. why is there no operator>>(bool)?
    if (replyType != "bool") return false;

    TQDataStream reply( replyData, IO_ReadOnly );
    reply >> success;

    if (!success) return false;
    return true;
}

// set the function result to DCOPRef pointing to (app,objId) and
// return true.
static bool findSuccess(const TQCString &app, const TQCString objId, TQCString &replyType, TQByteArray &replyData)
{
    DCOPRef ref(app, objId);
    replyType = "DCOPRef";

    replyData = TQByteArray();
    TQDataStream final_reply( replyData, IO_WriteOnly );
    final_reply << ref;
    return true;
}


bool DCOPClient::find(const TQCString &app, const TQCString &objId,
                      const TQCString &fun, const TQByteArray &data,
                      TQCString& replyType, TQByteArray &replyData)
{
    d->transaction = false; // Transactions are not allowed.
    if ( !app.isEmpty() && app != d->appId && app[app.length()-1] != '*') {
        tqWarning("WEIRD! we somehow received a DCOP message w/a different appId");
        return false;
    }

    if (objId.isEmpty() || objId[objId.length()-1] != '*')
    {
        if (fun.isEmpty())
        {
            if (objId.isEmpty() || DCOPObject::hasObject(objId))
               return findSuccess(app, objId, replyType, replyData);
            return false;
        }
        // Message to application or single object...
        if (receive(app, objId, fun, data, replyType, replyData))
        {
            if (findResultOk(replyType, replyData))
                return findSuccess(app, objId, replyType, replyData);
        }
    }
    else {
        // handle a multicast to several objects.
        // doesn't handle proxies currently.  should it?
        TQPtrList<DCOPObject> matchList =
            DCOPObject::match(objId.left(objId.length()-1));
        for (DCOPObject *objPtr = matchList.first();
             objPtr != 0L; objPtr = matchList.next())
        {
            replyType = 0;
            replyData = TQByteArray();
            if (fun.isEmpty())
                return findSuccess(app, objPtr->objId(), replyType, replyData);
            objPtr->setCallingDcopClient(this);
            if (objPtr->process(fun, data, replyType, replyData))
                if (findResultOk(replyType, replyData))
                    return findSuccess(app, objPtr->objId(), replyType, replyData);
        }
    }
    return false;
}


bool DCOPClient::call(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data,
                      TQCString& replyType, TQByteArray &replyData,
                      bool useEventLoop)
{
    return call( remApp, remObjId, remFun, data, replyType, replyData, useEventLoop, -1, false );
}

bool DCOPClient::call(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data,
                      TQCString& replyType, TQByteArray &replyData,
                      bool useEventLoop, int timeout)
{
    return call( remApp, remObjId, remFun, data, replyType, replyData, useEventLoop, timeout, false );
}

bool DCOPClient::call(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data,
                      TQCString& replyType, TQByteArray &replyData,
                      bool useEventLoop, int timeout, bool forceRemote)
{
    if (remApp.isEmpty())
        return false;
    DCOPClient *localClient = findLocalClient( remApp );

    if ( localClient && !forceRemote ) {
        bool saveTransaction = d->transaction;
        TQ_INT32 saveTransactionId = d->transactionId;
        TQCString saveSenderId = d->senderId;

        d->senderId = 0; // Local call
        bool b = localClient->receive(  remApp, remObjId, remFun, data, replyType, replyData );

        TQ_INT32 id = localClient->transactionId();
        if (id) {
           // Call delayed. We have to wait till it has been processed.
           do {
              TQApplication::eventLoop()->processEvents(TQEventLoop::WaitForMore);
           } while( !localClient->isLocalTransactionFinished(id, replyType, replyData));
           b = true;
        }
        d->transaction = saveTransaction;
        d->transactionId = saveTransactionId;
        d->senderId = saveSenderId;
        return b;
    }

    return callInternal(remApp, remObjId, remFun, data,
                        replyType, replyData, useEventLoop, timeout, DCOPCall);
}

void DCOPClient::asyncReplyReady()
{
    while( d->asyncReplyQueue.count() )
    {
        ReplyStruct *replyStruct = d->asyncReplyQueue.take(0);
        handleAsyncReply(replyStruct);
    }
}

int DCOPClient::callAsync(const TQCString &remApp, const TQCString &remObjId,
                const TQCString &remFun, const TQByteArray &data,
                TQObject *callBackObj, const char *callBackSlot)
{
    TQCString replyType;
    TQByteArray replyData;

    ReplyStruct *replyStruct = new ReplyStruct;
    replyStruct->replyType = new TQCString;
    replyStruct->replyData = new TQByteArray;
    replyStruct->replyObject = callBackObj;
    replyStruct->replySlot = callBackSlot;
    replyStruct->replyId = ++d->transactionId;
    if (d->transactionId < 0)  // Ensure that ids > 0
        d->transactionId = 0;

    bool b = callInternal(remApp, remObjId, remFun, data,
                          replyStruct, false, -1, DCOPCall);
    if (!b)
    {
        delete replyStruct->replyType;
        delete replyStruct->replyData;
        delete replyStruct;
        return 0;
    }

    if (replyStruct->transactionId == 0)
    {
        // Call is finished already
        TQTimer::singleShot(0, this, TQT_SLOT(asyncReplyReady()));
        d->asyncReplyQueue.append(replyStruct);
    }

    return replyStruct->replyId;
}

bool DCOPClient::callInternal(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data,
                      TQCString& replyType, TQByteArray &replyData,
                      bool useEventLoop, int timeout, int minor_opcode)
{
    ReplyStruct replyStruct;
    replyStruct.replyType = &replyType;
    replyStruct.replyData = &replyData;
    return callInternal(remApp, remObjId, remFun, data, &replyStruct, useEventLoop, timeout, minor_opcode);
}

bool DCOPClient::callInternal(const TQCString &remApp, const TQCString &remObjId,
                      const TQCString &remFun, const TQByteArray &data,
                      ReplyStruct *replyStruct,
                      bool useEventLoop, int timeout, int minor_opcode)
{
    if ( !isAttached() )
        return false;

    DCOPMsg *pMsg;

    CARD32 oldCurrentKey = d->currentKey;
    if ( !d->currentKey )
        d->currentKey = d->key; // no key yet, initiate new call

    TQByteArray ba;
    TQDataStream ds(ba, IO_WriteOnly);
    ds << d->appId << remApp << remObjId << normalizeFunctionSignature(remFun) << data.size();

    IceGetHeader(d->iceConn, d->majorOpcode, minor_opcode,
                 sizeof(DCOPMsg), DCOPMsg, pMsg);

    pMsg->key = d->currentKey;
    int datalen = ba.size() + data.size();
    pMsg->length += datalen;

// tqWarning("DCOP: %s made call %s:%s:%s key = %d", d->appId.data(), remApp.data(), remObjId.data(), remFun.data(), pMsg->key);

    IceSendData(d->iceConn, ba.size(), const_cast<char *>(ba.data()));
    IceSendData(d->iceConn, data.size(), const_cast<char *>(data.data()));

    if (IceConnectionStatus(d->iceConn) != IceConnectAccepted)
        return false;

    IceFlush (d->iceConn);

    IceReplyWaitInfo waitInfo;
    waitInfo.sequence_of_request = IceLastSentSequenceNumber(d->iceConn);
    waitInfo.major_opcode_of_request = d->majorOpcode;
    waitInfo.minor_opcode_of_request = minor_opcode;

    replyStruct->transactionId = -1;
    waitInfo.reply = static_cast<IcePointer>(replyStruct);

    Bool readyRet = False;
    IceProcessMessagesStatus s;

    timeval time_start;
    int time_left = -1;
    if( timeout >= 0 )
    {
        gettimeofday( &time_start, NULL );
        time_left = timeout;
    }
    for(;;) {
        bool checkMessages = true;
        if ( useEventLoop
             ? d->notifier != NULL  // useEventLoop needs a socket notifier and a tqApp
             : timeout >= 0 ) {     // !useEventLoop doesn't block only for timeout >= 0
            const int guiTimeout = 100;
            checkMessages = false;

            int msecs = useEventLoop
                ? guiTimeout  // timeout for the GUI refresh
                : time_left; // time remaining for the whole call
            fd_set fds;
            struct timeval tv;
            FD_ZERO( &fds );
            FD_SET( socket(), &fds );
            tv.tv_sec = msecs / 1000;
            tv.tv_usec = (msecs % 1000) * 1000;
            if ( select( socket() + 1, &fds, 0, 0, &tv ) <= 0 ) {
                if( useEventLoop && (timeout < 0 || time_left > guiTimeout)) {
                    // nothing was available, we got a timeout. Reactivate
                    // the GUI in blocked state.
                    bool old_lock = d->non_blocking_call_lock;
                    if ( !old_lock ) {
                        d->non_blocking_call_lock = true;
                        emit blockUserInput( true );
                    }
                    if( timeout >= 0 )
                        d->eventLoopTimer.start(time_left - guiTimeout, true);
                    tqApp->enter_loop();
                    d->eventLoopTimer.stop();
                    if ( !old_lock ) {
                        d->non_blocking_call_lock = false;
                        emit blockUserInput( false );
                    }
                }
            }
            else
            {
                checkMessages = true;
            }
        }
        if (!d->iceConn)
            return false;

        if( replyStruct->transactionId != -1 )
        {
            if (replyStruct->transactionId == 0)
               break; // Call complete
            if (!replyStruct->replySlot.isEmpty())
               break; // Async call
        }

        if( checkMessages ) { // something is available
            s = IceProcessMessages(d->iceConn, &waitInfo,
                                    &readyRet);
            if (s == IceProcessMessagesIOError) {
                detach();
                d->currentKey = oldCurrentKey;
                return false;
            }
        }
    
        if( replyStruct->transactionId != -1 )
        {
            if (replyStruct->transactionId == 0)
               break; // Call complete
            if (!replyStruct->replySlot.isEmpty())
               break; // Async call
        }

        if( timeout < 0 )
            continue;
        timeval time_now;
        gettimeofday( &time_now, NULL );
        time_left = timeout -
                        ((time_now.tv_sec - time_start.tv_sec) * 1000) -
                        ((time_now.tv_usec - time_start.tv_usec) / 1000);
        if( time_left <= 0)
        {
             if (useEventLoop)
             {
                // Before we fail, check one more time if something is available
                time_left = 0;
                useEventLoop = false;
                continue;
             } 
             *(replyStruct->replyType) = TQCString();
             *(replyStruct->replyData) = TQByteArray();
             replyStruct->status = ReplyStruct::Failed;
             break;
        }
    }

    // Wake up parent call, maybe it's reply is available already.
    if ( d->non_blocking_call_lock ) {
        tqApp->exit_loop();
    }

    d->currentKey = oldCurrentKey;
    return replyStruct->status != ReplyStruct::Failed;
}

void DCOPClient::eventLoopTimeout()
{
    tqApp->exit_loop();
}

void DCOPClient::processSocketData(int fd)
{
    // Make sure there is data to read!
    fd_set fds;
    timeval timeout;
    timeout.tv_sec = 0;
    timeout.tv_usec = 0;
    FD_ZERO(&fds);
    FD_SET(fd, &fds);
    int result = select(fd+1, &fds, 0, 0, &timeout);
    if (result == 0)
        return;

    if ( d->non_blocking_call_lock ) {
        if( tqApp )
            tqApp->exit_loop();
        return;
    }

    if (!d->iceConn) {
        if( d->notifier )
            d->notifier->deleteLater();
        d->notifier = 0;
        tqWarning("received an error processing data from the DCOP server!");
        return;
    }

    IceProcessMessagesStatus s =  IceProcessMessages(d->iceConn, 0, 0);

    if (s == IceProcessMessagesIOError) {
        detach();
        tqWarning("received an error processing data from the DCOP server!");
        return;
    }
}

void DCOPClient::setDefaultObject( const TQCString& objId )
{
    d->defaultObject = objId;
}


TQCString DCOPClient::defaultObject() const
{
    return d->defaultObject;
}

bool
DCOPClient::isLocalTransactionFinished(TQ_INT32 id, TQCString &replyType, TQByteArray &replyData)
{
    DCOPClientPrivate::LocalTransactionResult *result = d->localTransActionList.take(id);
    if (!result)
        return false;
    
    replyType = result->replyType;
    replyData = result->replyData;
    delete result;

    return true;
}

DCOPClientTransaction *
DCOPClient::beginTransaction()
{
    if (d->opcode == DCOPSend)
        return 0;
    if (!d->transactionList)
        d->transactionList = new TQPtrList<DCOPClientTransaction>;

    d->transaction = true;
    DCOPClientTransaction *trans = new DCOPClientTransaction();
    trans->senderId = d->senderId;
    trans->id = ++d->transactionId;
    if (d->transactionId < 0)  // Ensure that ids > 0
        d->transactionId = 0;
    trans->key = d->currentKey;

    d->transactionList->append( trans );

    return trans;
}

TQ_INT32
DCOPClient::transactionId() const
{
    if (d->transaction)
        return d->transactionId;
    else
        return 0;
}

void
DCOPClient::endTransaction( DCOPClientTransaction *trans, TQCString& replyType,
                            TQByteArray &replyData)
{
    if ( !trans )
        return;

    if ( !isAttached() )
        return;

    if ( !d->transactionList) {
        tqWarning("Transaction unknown: No pending transactions!");
        return; // No pending transactions!
    }

    if ( !d->transactionList->removeRef( trans ) ) {
        tqWarning("Transaction unknown: Not on list of pending transactions!");
        return; // Transaction
    }

    if (trans->senderId.isEmpty()) 
    {
        // Local transaction
        DCOPClientPrivate::LocalTransactionResult *result = new DCOPClientPrivate::LocalTransactionResult();
        result->replyType = replyType;
        result->replyData = replyData;
        
        d->localTransActionList.insert(trans->id, result);
        
        delete trans;

        return;
    }

    DCOPMsg *pMsg;

    TQByteArray ba;
    TQDataStream ds(ba, IO_WriteOnly);
    ds << d->appId << trans->senderId << trans->id << replyType << replyData;

    IceGetHeader(d->iceConn, d->majorOpcode, DCOPReplyDelayed,
                 sizeof(DCOPMsg), DCOPMsg, pMsg);
    pMsg->key = trans->key;
    pMsg->length += ba.size();

    IceSendData( d->iceConn, ba.size(), const_cast<char *>(ba.data()) );

    delete trans;
}

void
DCOPClient::emitDCOPSignal( const TQCString &object, const TQCString &signal, const TQByteArray &data)
{
    // We hack the sending object name into the signal name
    send("DCOPServer", "emit", object+"#"+normalizeFunctionSignature(signal), data);
}

void
DCOPClient::emitDCOPSignal( const TQCString &signal, const TQByteArray &data)
{
    emitDCOPSignal(0, signal, data);
}

bool
DCOPClient::connectDCOPSignal( const TQCString &sender, const TQCString &senderObj,
  const TQCString &signal,
  const TQCString &receiverObj, const TQCString &slot, bool Volatile)
{
    TQCString replyType;
    TQByteArray data, replyData;
    TQ_INT8 iVolatile = Volatile ? 1 : 0;

    TQDataStream args(data, IO_WriteOnly );
    args << sender << senderObj << normalizeFunctionSignature(signal) << receiverObj << normalizeFunctionSignature(slot) << iVolatile;

    if (!call("DCOPServer", 0,
        "connectSignal(TQCString,TQCString,TQCString,TQCString,TQCString,bool)",
        data, replyType, replyData))
    {
        return false;
    }

    if (replyType != "bool")
        return false;

    TQDataStream reply(replyData, IO_ReadOnly );
    TQ_INT8 result;
    reply >> result;
    return (result != 0);
}

bool
DCOPClient::connectDCOPSignal( const TQCString &sender, const TQCString &signal,
  const TQCString &receiverObj, const TQCString &slot, bool Volatile)
{
    return connectDCOPSignal( sender, 0, signal, receiverObj, slot, Volatile);
}

bool
DCOPClient::disconnectDCOPSignal( const TQCString &sender, const TQCString &senderObj,
  const TQCString &signal,
  const TQCString &receiverObj, const TQCString &slot)
{
    TQCString replyType;
    TQByteArray data, replyData;

    TQDataStream args(data, IO_WriteOnly );
    args << sender << senderObj << normalizeFunctionSignature(signal) << receiverObj << normalizeFunctionSignature(slot);

    if (!call("DCOPServer", 0,
        "disconnectSignal(TQCString,TQCString,TQCString,TQCString,TQCString)",
        data, replyType, replyData))
    {
        return false;
    }

    if (replyType != "bool")
        return false;

    TQDataStream reply(replyData, IO_ReadOnly );
    TQ_INT8 result;
    reply >> result;
    return (result != 0);
}

bool
DCOPClient::disconnectDCOPSignal( const TQCString &sender, const TQCString &signal,
  const TQCString &receiverObj, const TQCString &slot)
{
    return disconnectDCOPSignal( sender, 0, signal, receiverObj, slot);
}

void
DCOPClient::setPriorityCall(bool b)
{
    if (b)
    {
       if (d->currentKey == 2)
          return;
       d->currentKeySaved = d->currentKey;
       d->currentKey = 2;
    }
    else
    {
       if (d->currentKey != 2)
          return;
       d->currentKey = d->currentKeySaved;
       if ( !d->messages.isEmpty() )
          d->postMessageTimer.start( 0, true ); // Process queued messages
    }
}



void
DCOPClient::emergencyClose()
{
    TQPtrList<DCOPClient> list;
    client_map_t *map = DCOPClient_CliMap;
    if (!map) return;
    TQAsciiDictIterator<DCOPClient> it(*map);
    while(it.current()) {
       list.removeRef(it.current());
       list.append(it.current());
       ++it;
    }
    for(DCOPClient *cl = list.first(); cl; cl = list.next())
    {
        if (cl->d->iceConn) {
            IceProtocolShutdown(cl->d->iceConn, cl->d->majorOpcode);
            IceCloseConnection(cl->d->iceConn);
            cl->d->iceConn = 0L;
        }
    }
}

const char *
DCOPClient::postMortemSender()
{
    if (!dcop_main_client)
        return "";
    if (dcop_main_client->d->senderId.isEmpty())
        return "";
    return dcop_main_client->d->senderId.data();
}

const char *
DCOPClient::postMortemObject()
{
    if (!dcop_main_client)
        return "";
    return dcop_main_client->d->objId.data();
}
const char *
DCOPClient::postMortemFunction()
{
    if (!dcop_main_client)
        return "";
    return dcop_main_client->d->function.data();
}

void DCOPClient::virtual_hook( int, void* )
{ /*BASE::virtual_hook( id, data );*/ }

#include <dcopclient.moc>