query.cpp
/* This file is part of the KDE project
*
* Copyright (C) 2004 Jakub Stachowski <qbast@go2.pl>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "query.h"
#include "responder.h"
#include "remoteservice.h"
#include "sdevent.h"
#include <kdebug.h>
#include <qapplication.h>
#include <qtimer.h>
#define TIMEOUT_WAN 2000
#define TIMEOUT_LAN 200
namespace DNSSD
{
#ifdef HAVE_DNSSD
void query_callback (DNSServiceRef, DNSServiceFlags flags, uint32_t, DNSServiceErrorType errorCode,
const char *serviceName, const char *regtype, const char *replyDomain, void *context);
#endif
class QueryPrivate : public Responder
{
public:
QueryPrivate(const QString& type, const QString& domain) : Responder(), m_finished(false),
m_domain(domain), m_type(type)
{};
bool m_finished;
QString m_domain;
QTimer timeout;
QString m_type;
};
Query::Query(const QString& type, const QString& domain)
{
d = new QueryPrivate(type,domain);
connect(&d->timeout,SIGNAL(timeout()),this,SLOT(timeout()));
}
Query::~Query()
{
delete d;
}
bool Query::isRunning() const
{
return d->isRunning();
}
bool Query::isFinished() const
{
return d->m_finished;
}
const QString& Query::domain() const
{
return d->m_domain;
}
void Query::startQuery()
{
if (d->isRunning()) return;
d->m_finished = false;
#ifdef HAVE_DNSSD
DNSServiceRef ref;
if (DNSServiceBrowse(&ref,0,0, d->m_type.ascii(),
domainToDNS(d->m_domain),query_callback,reinterpret_cast<void*>(this))
== kDNSServiceErr_NoError) d->setRef(ref);
#endif
if (!d->isRunning()) emit finished();
else d->timeout.start(domainIsLocal(d->m_domain) ? TIMEOUT_LAN : TIMEOUT_WAN,true);
}
void Query::virtual_hook(int, void*)
{
}
void Query::customEvent(QCustomEvent* event)
{
if (event->type()==QEvent::User+SD_ERROR) {
d->stop();
d->m_finished=false;
emit finished();
}
if (event->type()==QEvent::User+SD_ADDREMOVE) {
RemoteService* svr;
AddRemoveEvent *aev = static_cast<AddRemoveEvent*>(event);
// m_type has useless trailing dot
QString type=aev->m_type.left(aev->m_type.length()-1);
// label is badly splitted here - _http _tcp.local. . - rely on decode()
if (d->m_type=="_services._dns-sd._udp") svr = new RemoteService(aev->m_name+"."+
type+"."+aev->m_domain);
else svr = new RemoteService(aev->m_name, type, aev->m_domain);
if (aev->m_op==AddRemoveEvent::Add) emit serviceAdded(svr);
else emit serviceRemoved(svr);
d->m_finished = aev->m_last;
if (d->m_finished) emit finished();
}
}
void Query::timeout()
{
d->m_finished=true;
emit finished();
}
#ifdef HAVE_DNSSD
void query_callback (DNSServiceRef, DNSServiceFlags flags, uint32_t, DNSServiceErrorType errorCode,
const char *serviceName, const char *regtype, const char *replyDomain,
void *context)
{
QObject *obj = reinterpret_cast<QObject*>(context);
if (errorCode != kDNSServiceErr_NoError) {
ErrorEvent err;
QApplication::sendEvent(obj, &err);
} else {
AddRemoveEvent arev((flags & kDNSServiceFlagsAdd) ? AddRemoveEvent::Add :
AddRemoveEvent::Remove, QString::fromUtf8(serviceName), regtype,
DNSToDomain(replyDomain), !(flags & kDNSServiceFlagsMoreComing));
QApplication::sendEvent(obj, &arev);
}
}
#endif
}
#include "query.moc"
DNSSD::Query::startQuery
virtual void startQuery()
Starts query.
Definition: query.cpp:77
DNSSD::Query::isRunning
bool isRunning() const
Returns TRUE if query is already running.
Definition: query.cpp:62
DNSSD::Query::finished
void finished()
Emitted when all announced services has been reported.
DNSSD::Query::domain
const QString & domain() const
Returns queried domain.
Definition: query.cpp:72
DNSSD::Query::Query
Query(const QString &type, const QString &domain)
Creates new query.
Definition: query.cpp:50
DNSSD::Query::serviceRemoved
void serviceRemoved(DNSSD::RemoteService::Ptr)
Emitted when previously discovered service is not longer published.
DNSSD::Query::serviceAdded
void serviceAdded(DNSSD::RemoteService::Ptr)
Emitted when new service has been discovered.
DNSSD::Query::isFinished
bool isFinished() const
Returns TRUE if all currently announced services has been reported.
Definition: query.cpp:67

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