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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "syssocket.h" // this should be the first header included
#include "servicebrowser_p.h"
#include <QCoreApplication>
#include <QDebug>
#include <QDir>
#include <QFileInfo>
#include <QString>
#include <QStringList>
#include <QProcess>
#ifdef Q_OS_LINUX
#define EMBEDDED_LIB
#endif
#ifdef Q_OS_WIN32
#define EMBEDDED_LIB
#endif
#ifdef EMBEDDED_LIB
#define PID_FILE "/tmp/mdnsd.pid"
#define MDNS_UDS_SERVERPATH "/tmp/mdnsd"
#include "embed/dnssd_ipc.c"
#include "embed/dnssd_clientlib.c"
#include "embed/dnssd_clientstub.c"
#ifdef Q_OS_WIN
#include "embed/DebugServices.c"
#endif
namespace ZeroConf {
namespace Internal {
// represents a zero conf library exposing the dns-sd interface
class EmbeddedZConfLib : public ZConfLib
{
public:
QString daemonPath;
EmbeddedZConfLib(const QString &daemonPath, ZConfLib::Ptr fallBack) : ZConfLib(fallBack),
daemonPath(daemonPath)
{
if (daemonPath.isEmpty())
m_maxErrors = 0;
if (!daemonPath.isEmpty() && daemonPath.at(0) != QLatin1Char('/') && daemonPath.at(0) != QLatin1Char('.'))
this->daemonPath = QCoreApplication::applicationDirPath() + QLatin1Char('/') + daemonPath;
}
~EmbeddedZConfLib()
{ }
QString name()
{
return QString::fromLatin1("Embedded Dns_sd Library");
}
bool tryStartDaemon(ErrorMessage::ErrorLogger *logger)
{
if (!daemonPath.isEmpty()) {
QFileInfo dPath(daemonPath);
QProcess killall;
bool killAllFailed = false;
#ifdef Q_OS_WIN
QString cmd = QLatin1String("taskill /im ") + dPath.fileName()
+ QLatin1String(" /f /t");
#else
QString cmd = QLatin1String("killall ") + dPath.fileName()
+ QLatin1String(" 2> /dev/null");
#endif
killall.start(cmd);
if (!killall.waitForStarted()) {
killAllFailed = true;
} else {
killall.closeWriteChannel();
killall.waitForFinished();
}
if (killAllFailed) {
if (logger)
logger->appendError(ErrorMessage::WarningLevel,
ZConfLib::tr("%1 failed to kill other daemons with \"%2\".")
.arg(name()).arg(cmd));
if (DEBUG_ZEROCONF)
qDebug() << name() << " had an error trying to kill other daemons with " << cmd;
}
QString daemonCmd = daemonPath;
QStringList daemonArgs;
#ifdef Q_OS_LINUX
if (QFile::exists(QLatin1String("/tmp/mdnsd")) && logger)
logger->appendError(ErrorMessage::WarningLevel,
ZConfLib::tr("%1 detected a file at /tmp/mdnsd, daemon startup will probably fail.")
.arg(name()));
QString logFile = QString::fromLatin1("/tmp/mdnssd.log");
static int didFail = 0;
QFile oldLog(logFile);
if (didFail > 1 && oldLog.exists()) {
oldLog.open(QIODevice::ReadOnly);
if (logger) {
QByteArray logBA = oldLog.readAll();
logger->appendError(ErrorMessage::NoteLevel,
ZConfLib::tr("%1: log of previous daemon run is: \"%2\".")
.arg(name(), QString::fromLatin1(logBA.constData(), logBA.size())) + QLatin1Char('\n'));
qDebug()<<logBA.size()<<oldLog.error()<<oldLog.errorString();
}
oldLog.close();
}
if (++didFail > 1)
daemonArgs << QString::fromLatin1("-debug");
#endif
if (QProcess::startDetached(daemonCmd, daemonArgs)) {
QThread::yieldCurrentThread();
// sleep a bit?
if (DEBUG_ZEROCONF)
qDebug() << name() << " started " << daemonCmd << daemonArgs;
return true;
} else {
this->setError(true, ZConfLib::tr("%1 failed starting embedded daemon at %2.")
.arg(name()).arg(daemonPath));
}
}
return false;
}
void refDeallocate(DNSServiceRef sdRef)
{
embeddedLib::DNSServiceRefDeallocate(sdRef);
}
void browserDeallocate(BrowserRef *bRef)
{
if (bRef){
embeddedLib::DNSServiceRefDeallocate(*reinterpret_cast<DNSServiceRef*>(bRef));
*bRef = 0;
}
}
void stopConnection(ConnectionRef cRef)
{
int sock = refSockFD(cRef);
if (sock>0)
shutdown(sock, SHUT_RDWR);
}
void destroyConnection(ConnectionRef *sdRef)
{
if (sdRef) {
embeddedLib::DNSServiceRefDeallocate(*reinterpret_cast<DNSServiceRef*>(sdRef));
*sdRef = 0;
}
}
DNSServiceErrorType resolve(ConnectionRef cRef,
DNSServiceRef *sdRef,
uint32_t interfaceIndex,
ZK_IP_Protocol /* protocol */,
const char *name,
const char *regtype,
const char *domain,
ServiceGatherer *gatherer)
{
*sdRef = reinterpret_cast<DNSServiceRef>(cRef);
return embeddedLib::DNSServiceResolve(sdRef, kDNSServiceFlagsShareConnection
// | kDNSServiceFlagsSuppressUnusable
| kDNSServiceFlagsTimeout,
interfaceIndex, name, regtype, domain,
&cServiceResolveReply, gatherer);
}
DNSServiceErrorType queryRecord(ConnectionRef cRef,
DNSServiceRef *sdRef,
uint32_t interfaceIndex,
const char *fullname,
ServiceGatherer *gatherer)
{
*sdRef = reinterpret_cast<DNSServiceRef>(cRef);
return embeddedLib::DNSServiceQueryRecord(sdRef, kDNSServiceFlagsShareConnection
// | kDNSServiceFlagsSuppressUnusable
| kDNSServiceFlagsTimeout,
interfaceIndex, fullname,
kDNSServiceType_TXT, kDNSServiceClass_IN,
&cTxtRecordReply , gatherer);
}
DNSServiceErrorType getAddrInfo(ConnectionRef cRef,
DNSServiceRef *sdRef,
uint32_t interfaceIndex,
DNSServiceProtocol protocol,
const char *hostname,
ServiceGatherer *gatherer)
{
*sdRef = reinterpret_cast<DNSServiceRef>(cRef);
return embeddedLib::DNSServiceGetAddrInfo(sdRef, kDNSServiceFlagsShareConnection
// | kDNSServiceFlagsSuppressUnusable
| kDNSServiceFlagsTimeout,
interfaceIndex, protocol,
hostname, &cAddrReply, gatherer);
}
DNSServiceErrorType reconfirmRecord(ConnectionRef /*cRef*/, uint32_t /*interfaceIndex*/,
const char * /*name*/, const char * /*type*/,
const char * /*domain*/, const char * /*fullname*/)
{
// reload and force update with in the callback with
// embeddedLib::DNSServiceReconfirmRecord(flags, interfaceIndex, fullname, rrtype,
// rrclass, rdlen, rdata);
return kDNSServiceErr_Unsupported;
}
DNSServiceErrorType browse(ConnectionRef cRef,
BrowserRef *bRef,
uint32_t interfaceIndex,
const char *regtype,
const char *domain, /* may be NULL */
ServiceBrowserPrivate *browser)
{
DNSServiceRef *sdRef = reinterpret_cast<DNSServiceRef *>(bRef);
*sdRef = reinterpret_cast<DNSServiceRef>(cRef);
return embeddedLib::DNSServiceBrowse(sdRef, kDNSServiceFlagsShareConnection
/* | kDNSServiceFlagsSuppressUnusable */,
interfaceIndex, regtype, domain, &cBrowseReply,
browser);
}
DNSServiceErrorType getProperty(const char *property, void *result, uint32_t *size)
{
return embeddedLib::DNSServiceGetProperty(property, result, size);
}
RunLoopStatus processOneEventBlock(ConnectionRef cRef)
{
if (embeddedLib::DNSServiceProcessResult(reinterpret_cast<DNSServiceRef>(cRef)) != kDNSServiceErr_NoError)
return ProcessedError;
return ProcessedOk;
}
DNSServiceErrorType createConnection(MainConnection *, ConnectionRef *sdRef)
{
return embeddedLib::DNSServiceCreateConnection(reinterpret_cast<DNSServiceRef*>(sdRef));
}
int refSockFD(ConnectionRef sdRef)
{
return embeddedLib::DNSServiceRefSockFD(reinterpret_cast<DNSServiceRef>(sdRef));
}
};
ZConfLib::Ptr ZConfLib::createEmbeddedLib(const QString &daemonPath, const ZConfLib::Ptr &fallback)
{
return ZConfLib::Ptr(new EmbeddedZConfLib(daemonPath, fallback));
}
} // namespace Internal
} // namespace ZeroConf
#else // no embedded lib
namespace ZeroConf {
namespace Internal {
ZConfLib::Ptr ZConfLib::createEmbeddedLib(const QString &, const ZConfLib::Ptr &fallback)
{
return fallback;
}
} // namespace Internal
} // namespace ZeroConf
#endif
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