From e54dc7c2b5b9aa14989f26a718eb99d7516af4a0 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jeremy=20Lain=C3=A9?= Date: Mon, 23 Jan 2012 18:25:39 +0100 Subject: Add support for DNS lookups using native APIs The QDnsLookup class provides asynchronous APIs for performing DNS lookups. For now, the following lookups are supported: - A and AAAA - CNAME as defined per RFC 1035 - MX as defined per RFC 1035 - NS as defined per RFC 1035 - PTR as defined per RFC 1035 - SRV as defined per RFC 2782 - TXT as defined per RFC 1035 Task-number: QTBUG-10481 Change-Id: I46c1741ec23615863eeca3a1231d5e3f8942495e Reviewed-by: Thiago Macieira --- examples/network/dnslookup/dnslookup.cpp | 155 +++++++++++++++++++++++++++++++ examples/network/dnslookup/dnslookup.h | 61 ++++++++++++ examples/network/dnslookup/dnslookup.pro | 12 +++ 3 files changed, 228 insertions(+) create mode 100644 examples/network/dnslookup/dnslookup.cpp create mode 100644 examples/network/dnslookup/dnslookup.h create mode 100644 examples/network/dnslookup/dnslookup.pro (limited to 'examples/network/dnslookup') diff --git a/examples/network/dnslookup/dnslookup.cpp b/examples/network/dnslookup/dnslookup.cpp new file mode 100644 index 0000000000..90cf914629 --- /dev/null +++ b/examples/network/dnslookup/dnslookup.cpp @@ -0,0 +1,155 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Jeremy Lainé +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "dnslookup.h" + +#include +#include +#include +#include +#include + +#include + +static void usage() { + printf("Qt DNS example - performs DNS lookups\n" + "Usage: dnslookup [-t ] name\n\n"); +} + +DnsManager::DnsManager() +{ + dns = new QDnsLookup(this); + connect(dns, SIGNAL(finished()), this, SLOT(showResults())); +} + +void DnsManager::execute() +{ + QStringList args = QCoreApplication::instance()->arguments(); + args.takeFirst(); + + // lookup type + dns->setType(QDnsLookup::A); + if (args.size() > 1 && args.first() == "-t") { + args.takeFirst(); + const QString type = args.takeFirst().toLower(); + if (type == "a") + dns->setType(QDnsLookup::A); + else if (type == "aaaa") + dns->setType(QDnsLookup::AAAA); + else if (type == "any") + dns->setType(QDnsLookup::ANY); + else if (type == "cname") + dns->setType(QDnsLookup::CNAME); + else if (type == "mx") + dns->setType(QDnsLookup::MX); + else if (type == "ns") + dns->setType(QDnsLookup::NS); + else if (type == "ptr") + dns->setType(QDnsLookup::PTR); + else if (type == "srv") + dns->setType(QDnsLookup::SRV); + else if (type == "txt") + dns->setType(QDnsLookup::TXT); + else { + printf("Bad record type: %s\n", qPrintable(type)); + QCoreApplication::instance()->quit(); + return; + } + } + if (args.isEmpty()) { + usage(); + QCoreApplication::instance()->quit(); + return; + } + dns->setName(args.takeFirst()); + dns->lookup(); +} + +void DnsManager::showResults() +{ + if (dns->error() != QDnsLookup::NoError) + printf("Error: %i (%s)\n", dns->error(), qPrintable(dns->errorString())); + + // CNAME records + foreach (const QDnsDomainNameRecord &record, dns->canonicalNameRecords()) + printf("%s\t%i\tIN\tCNAME\t%s\n", qPrintable(record.name()), record.timeToLive(), qPrintable(record.value())); + + // A and AAAA records + foreach (const QDnsHostAddressRecord &record, dns->hostAddressRecords()) { + const char *type = (record.value().protocol() == QAbstractSocket::IPv6Protocol) ? "AAAA" : "A"; + printf("%s\t%i\tIN\t%s\t%s\n", qPrintable(record.name()), record.timeToLive(), type, qPrintable(record.value().toString())); + } + + // MX records + foreach (const QDnsMailExchangeRecord &record, dns->mailExchangeRecords()) + printf("%s\t%i\tIN\tMX\t%u %s\n", qPrintable(record.name()), record.timeToLive(), record.preference(), qPrintable(record.exchange())); + + // NS records + foreach (const QDnsDomainNameRecord &record, dns->nameServerRecords()) + printf("%s\t%i\tIN\tNS\t%s\n", qPrintable(record.name()), record.timeToLive(), qPrintable(record.value())); + + // PTR records + foreach (const QDnsDomainNameRecord &record, dns->pointerRecords()) + printf("%s\t%i\tIN\tPTR\t%s\n", qPrintable(record.name()), record.timeToLive(), qPrintable(record.value())); + + // SRV records + foreach (const QDnsServiceRecord &record, dns->serviceRecords()) + printf("%s\t%i\tIN\tSRV\t%u %u %u %s\n", qPrintable(record.name()), record.timeToLive(), record.priority(), record.weight(), record.port(), qPrintable(record.target())); + + // TXT records + foreach (const QDnsTextRecord &record, dns->textRecords()) { + QStringList values; + foreach (const QByteArray &ba, record.values()) + values << "\"" + QString::fromAscii(ba) + "\""; + printf("%s\t%i\tIN\tTXT\t%s\n", qPrintable(record.name()), record.timeToLive(), qPrintable(values.join(" "))); + } + + QCoreApplication::instance()->quit(); +} + +int main(int argc, char *argv[]) +{ + QCoreApplication app(argc, argv); + + DnsManager manager; + QTimer::singleShot(0, &manager, SLOT(execute())); + + return app.exec(); +} diff --git a/examples/network/dnslookup/dnslookup.h b/examples/network/dnslookup/dnslookup.h new file mode 100644 index 0000000000..3c59173fe5 --- /dev/null +++ b/examples/network/dnslookup/dnslookup.h @@ -0,0 +1,61 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Jeremy Lainé +** Contact: http://www.qt-project.org/ +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include + +QT_BEGIN_NAMESPACE +class QDnsLookup; +QT_END_NAMESPACE + +class DnsManager : public QObject +{ + Q_OBJECT + +public: + DnsManager(); + +public slots: + void execute(); + void showResults(); + +private: + QDnsLookup *dns; +}; + diff --git a/examples/network/dnslookup/dnslookup.pro b/examples/network/dnslookup/dnslookup.pro new file mode 100644 index 0000000000..160666de7c --- /dev/null +++ b/examples/network/dnslookup/dnslookup.pro @@ -0,0 +1,12 @@ +TEMPLATE = app +QT = core network +mac:CONFIG -= app_bundle +win32:CONFIG += console +HEADERS += dnslookup.h +SOURCES += dnslookup.cpp + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/network/dnslookup +sources.files = $$SOURCES $$HEADERS $$FORMS $$RESOURCES *.pro +sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/network/dnslookup +INSTALLS += target sources -- cgit v1.2.3