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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtNetwork module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <winsock2.h>
#include "qhostinfo_p.h"
#include "private/qnativesocketengine_p.h"
#include <ws2tcpip.h>
#include <qlibrary.h>
#include <qmutex.h>
#include <qurl.h>
#include <private/qmutexpool_p.h>
QT_BEGIN_NAMESPACE
//#define QHOSTINFO_DEBUG
// Older SDKs do not include the addrinfo struct declaration, so we
// include a copy of it here.
struct qt_addrinfo
{
int ai_flags;
int ai_family;
int ai_socktype;
int ai_protocol;
size_t ai_addrlen;
char *ai_canonname;
sockaddr *ai_addr;
qt_addrinfo *ai_next;
};
//###
#define QT_SOCKLEN_T int
#ifndef NI_MAXHOST // already defined to 1025 in ws2tcpip.h?
#define NI_MAXHOST 1024
#endif
typedef int (__stdcall *getnameinfoProto)(const sockaddr *, QT_SOCKLEN_T, const char *, DWORD, const char *, DWORD, int);
typedef int (__stdcall *getaddrinfoProto)(const char *, const char *, const qt_addrinfo *, qt_addrinfo **);
typedef int (__stdcall *freeaddrinfoProto)(qt_addrinfo *);
static getnameinfoProto local_getnameinfo = 0;
static getaddrinfoProto local_getaddrinfo = 0;
static freeaddrinfoProto local_freeaddrinfo = 0;
static void resolveLibrary()
{
// Attempt to resolve getaddrinfo(); without it we'll have to fall
// back to gethostbyname(), which has no IPv6 support.
#if !defined(Q_OS_WINCE)
local_getaddrinfo = (getaddrinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "getaddrinfo");
local_freeaddrinfo = (freeaddrinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "freeaddrinfo");
local_getnameinfo = (getnameinfoProto) QLibrary::resolve(QLatin1String("ws2_32.dll"), "getnameinfo");
#else
local_getaddrinfo = (getaddrinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "getaddrinfo");
local_freeaddrinfo = (freeaddrinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "freeaddrinfo");
local_getnameinfo = (getnameinfoProto) QLibrary::resolve(QLatin1String("ws2.dll"), "getnameinfo");
#endif
}
#if defined(Q_OS_WINCE)
#include <qmutex.h>
QMutex qPrivCEMutex;
#endif
QHostInfo QHostInfoAgent::fromName(const QString &hostName)
{
#if defined(Q_OS_WINCE)
QMutexLocker locker(&qPrivCEMutex);
#endif
QWindowsSockInit winSock;
// Load res_init on demand.
static volatile bool triedResolve = false;
if (!triedResolve) {
QMutexLocker locker(QMutexPool::globalInstanceGet(&local_getaddrinfo));
if (!triedResolve) {
resolveLibrary();
triedResolve = true;
}
}
QHostInfo results;
#if defined(QHOSTINFO_DEBUG)
qDebug("QHostInfoAgent::fromName(%p): looking up \"%s\" (IPv6 support is %s)",
this, hostName.toLatin1().constData(),
(local_getaddrinfo && local_freeaddrinfo) ? "enabled" : "disabled");
#endif
QHostAddress address;
if (address.setAddress(hostName)) {
// Reverse lookup
if (local_getnameinfo) {
sockaddr_in sa4;
qt_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.qt_s6_addr, address.toIPv6Address().c, sizeof(sa6.sin6_addr.qt_s6_addr));
}
char hbuf[NI_MAXHOST];
if (local_getnameinfo(sa, saSize, hbuf, sizeof(hbuf), 0, 0, 0) == 0)
results.setHostName(QString::fromLatin1(hbuf));
} else {
unsigned long addr = inet_addr(hostName.toLatin1().constData());
struct hostent *ent = gethostbyaddr((const char*)&addr, sizeof(addr), AF_INET);
if (ent)
results.setHostName(QString::fromLatin1(ent->h_name));
}
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;
}
if (local_getaddrinfo && local_freeaddrinfo) {
// Call getaddrinfo, and place all IPv4 addresses at the start
// and the IPv6 addresses at the end of the address list in
// results.
qt_addrinfo *res;
int err = local_getaddrinfo(aceHostname.constData(), 0, 0, &res);
if (err == 0) {
QList<QHostAddress> addresses;
for (qt_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(((qt_sockaddr_in6 *) p->ai_addr)->sin6_addr.qt_s6_addr);
if (!addresses.contains(addr))
addresses.append(addr);
}
break;
default:
results.setError(QHostInfo::UnknownError);
results.setErrorString(tr("Unknown address type"));
}
}
results.setAddresses(addresses);
local_freeaddrinfo(res);
} else if (WSAGetLastError() == WSAHOST_NOT_FOUND || WSAGetLastError() == WSANO_DATA) {
results.setError(QHostInfo::HostNotFound);
results.setErrorString(tr("Host not found"));
} else {
results.setError(QHostInfo::UnknownError);
results.setErrorString(tr("Unknown error"));
}
} else {
// Fall back to gethostbyname, which only supports IPv4.
hostent *ent = gethostbyname(aceHostname.constData());
if (ent) {
char **p;
QList<QHostAddress> addresses;
switch (ent->h_addrtype) {
case AF_INET:
for (p = ent->h_addr_list; *p != 0; p++) {
long *ip4Addr = (long *) *p;
QHostAddress temp;
temp.setAddress(ntohl(*ip4Addr));
addresses << temp;
}
break;
default:
results.setError(QHostInfo::UnknownError);
results.setErrorString(tr("Unknown address type"));
break;
}
results.setAddresses(addresses);
} else if (WSAGetLastError() == 11001) {
results.setErrorString(tr("Host not found"));
results.setError(QHostInfo::HostNotFound);
} else {
results.setErrorString(tr("Unknown error"));
results.setError(QHostInfo::UnknownError);
}
}
#if defined(QHOSTINFO_DEBUG)
if (results.error() != QHostInfo::NoError) {
qDebug("QHostInfoAgent::run(%p): error (%s)",
this, 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(%p): found %i entries: {%s}",
this, addresses.count(), tmp.toLatin1().constData());
}
#endif
return results;
}
QString QHostInfo::localHostName()
{
QWindowsSockInit winSock;
char hostName[512];
if (gethostname(hostName, sizeof(hostName)) == -1)
return QString();
hostName[sizeof(hostName) - 1] = '\0';
return QString::fromLocal8Bit(hostName);
}
// QString QHostInfo::localDomainName() defined in qnetworkinterface_win.cpp
QT_END_NAMESPACE
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