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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/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 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <winsock2.h>
#include "qhostinfo_p.h"
#include <ws2tcpip.h>
#include <private/qsystemlibrary_p.h>
#include <qmutex.h>
#include <qbasicatomic.h>
#include <qurl.h>
QT_BEGIN_NAMESPACE
//#define QHOSTINFO_DEBUG
//###
#define QT_SOCKLEN_T int
#ifndef NI_MAXHOST // already defined to 1025 in ws2tcpip.h?
#define NI_MAXHOST 1024
#endif
static void translateWSAError(int error, QHostInfo *results)
{
switch (error) {
case WSAHOST_NOT_FOUND: //authoritative not found
case WSATRY_AGAIN: //non authoritative not found
case WSANO_DATA: //valid name, no associated address
results->setError(QHostInfo::HostNotFound);
results->setErrorString(QHostInfoAgent::tr("Host not found"));
return;
default:
results->setError(QHostInfo::UnknownError);
results->setErrorString(QHostInfoAgent::tr("Unknown error (%1)").arg(error));
return;
}
}
QHostInfo QHostInfoAgent::fromName(const QString &hostName)
{
QSysInfo::machineHostName(); // this initializes ws2_32.dll
QHostInfo results;
#if defined(QHOSTINFO_DEBUG)
qDebug("QHostInfoAgent::fromName(): looking up \"%s\" (IPv6 support is %s)",
hostName.toLatin1().constData(),
(getaddrinfo && freeaddrinfo) ? "enabled" : "disabled");
#endif
QHostAddress address;
if (address.setAddress(hostName)) {
// Reverse lookup
sockaddr_in sa4;
sockaddr_in6 sa6;
sockaddr *sa;
QT_SOCKLEN_T saSize;
if (address.protocol() == QAbstractSocket::IPv4Protocol) {
sa = (sockaddr *)&sa4;
saSize = sizeof(sa4);
memset(&sa4, 0, sizeof(sa4));
sa4.sin_family = AF_INET;
sa4.sin_addr.s_addr = htonl(address.toIPv4Address());
} else {
sa = (sockaddr *)&sa6;
saSize = sizeof(sa6);
memset(&sa6, 0, sizeof(sa6));
sa6.sin6_family = AF_INET6;
memcpy(&sa6.sin6_addr, address.toIPv6Address().c, sizeof(sa6.sin6_addr));
}
char hbuf[NI_MAXHOST];
if (getnameinfo(sa, saSize, hbuf, sizeof(hbuf), 0, 0, 0) == 0)
results.setHostName(QString::fromLatin1(hbuf));
if (results.hostName().isEmpty())
results.setHostName(address.toString());
results.setAddresses(QList<QHostAddress>() << address);
return results;
}
// IDN support
QByteArray aceHostname = QUrl::toAce(hostName);
results.setHostName(hostName);
if (aceHostname.isEmpty()) {
results.setError(QHostInfo::HostNotFound);
results.setErrorString(hostName.isEmpty() ? tr("No host name given") : tr("Invalid hostname"));
return results;
}
addrinfo *res;
int err = getaddrinfo(aceHostname.constData(), 0, 0, &res);
if (err == 0) {
QList<QHostAddress> addresses;
for (addrinfo *p = res; p != 0; p = p->ai_next) {
switch (p->ai_family) {
case AF_INET: {
QHostAddress addr;
addr.setAddress(ntohl(((sockaddr_in *) p->ai_addr)->sin_addr.s_addr));
if (!addresses.contains(addr))
addresses.append(addr);
}
break;
case AF_INET6: {
QHostAddress addr;
addr.setAddress(((sockaddr_in6 *) p->ai_addr)->sin6_addr.s6_addr);
if (!addresses.contains(addr))
addresses.append(addr);
}
break;
default:
results.setError(QHostInfo::UnknownError);
results.setErrorString(tr("Unknown address type"));
}
}
results.setAddresses(addresses);
freeaddrinfo(res);
} else {
translateWSAError(WSAGetLastError(), &results);
}
#if defined(QHOSTINFO_DEBUG)
if (results.error() != QHostInfo::NoError) {
qDebug("QHostInfoAgent::run(): error (%s)",
results.errorString().toLatin1().constData());
} else {
QString tmp;
QList<QHostAddress> addresses = results.addresses();
for (int i = 0; i < addresses.count(); ++i) {
if (i != 0) tmp += ", ";
tmp += addresses.at(i).toString();
}
qDebug("QHostInfoAgent::run(): found %i entries: {%s}",
addresses.count(), tmp.toLatin1().constData());
}
#endif
return results;
}
// QString QHostInfo::localDomainName() defined in qnetworkinterface_win.cpp
QT_END_NAMESPACE
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