Long live Qt 4.5!

1 files changed, 379 insertions, 0 deletions

diff --git a/src/network/kernel/qhostinfo_unix.cpp b/src/network/kernel/qhostinfo_unix.cpp
new file mode 100644
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--- /dev/null
+++ b/src/network/kernel/qhostinfo_unix.cpp
@@ -0,0 +1,379 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (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 either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//#define QHOSTINFO_DEBUG
+
+static const int RESOLVER_TIMEOUT = 2000;
+
+#include "qplatformdefs.h"
+
+#include "qhostinfo_p.h"
+#include "qiodevice.h"
+#include <qbytearray.h>
+#include <qlibrary.h>
+#include <qurl.h>
+#include <qfile.h>
+#include <private/qmutexpool_p.h>
+
+extern "C" {
+#include <sys/types.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <resolv.h>
+}
+
+#if defined (QT_NO_GETADDRINFO)
+#include <qmutex.h>
+QT_BEGIN_NAMESPACE
+Q_GLOBAL_STATIC(QMutex, getHostByNameMutex)
+QT_END_NAMESPACE
+#endif
+
+QT_BEGIN_NAMESPACE
+
+// Almost always the same. If not, specify in qplatformdefs.h.
+#if !defined(QT_SOCKOPTLEN_T)
+# define QT_SOCKOPTLEN_T QT_SOCKLEN_T
+#endif
+
+// HP-UXi has a bug in getaddrinfo(3) that makes it thread-unsafe
+// with this flag. So disable it in that platform.
+#if defined(AI_ADDRCONFIG) && !defined(Q_OS_HPUX)
+#  define Q_ADDRCONFIG          AI_ADDRCONFIG
+#endif
+
+typedef struct __res_state *res_state_ptr;
+
+typedef int (*res_init_proto)(void);
+static res_init_proto local_res_init = 0;
+typedef int (*res_ninit_proto)(res_state_ptr);
+static res_ninit_proto local_res_ninit = 0;
+typedef void (*res_nclose_proto)(res_state_ptr);
+static res_nclose_proto local_res_nclose = 0;
+static res_state_ptr local_res = 0;
+
+static void resolveLibrary()
+{
+#ifndef QT_NO_LIBRARY
+    QLibrary lib(QLatin1String("resolv"));
+    if (!lib.load())
+        return;
+
+    local_res_init = res_init_proto(lib.resolve("__res_init"));
+    if (!local_res_init)
+        local_res_init = res_init_proto(lib.resolve("res_init"));
+
+    local_res_ninit = res_ninit_proto(lib.resolve("__res_ninit"));
+    if (!local_res_ninit)
+        local_res_ninit = res_ninit_proto(lib.resolve("res_ninit"));
+
+    if (!local_res_ninit) {
+        // if we can't get a thread-safe context, we have to use the global _res state
+        local_res = res_state_ptr(lib.resolve("_res"));
+    } else {
+        local_res_nclose = res_nclose_proto(lib.resolve("res_nclose"));
+        if (!local_res_nclose)
+            local_res_nclose = res_nclose_proto(lib.resolve("__res_nclose"));
+        if (!local_res_nclose)
+            local_res_ninit = 0;
+    }
+#endif
+}
+
+QHostInfo QHostInfoAgent::fromName(const QString &hostName)
+{
+    QHostInfo results;
+    results.setHostName(hostName);
+
+#if defined(QHOSTINFO_DEBUG)
+    qDebug("QHostInfoAgent::fromName(%s) looking up...",
+           hostName.toLatin1().constData());
+#endif
+
+    // Load res_init on demand.
+    static volatile bool triedResolve = false;
+    if (!triedResolve) {
+#ifndef QT_NO_THREAD
+        QMutexLocker locker(QMutexPool::globalInstanceGet(&local_res_init));
+#endif
+        if (!triedResolve) {
+            resolveLibrary();
+            triedResolve = true;
+        }
+    }
+
+    // If res_init is available, poll it.
+    if (local_res_init)
+        local_res_init();
+
+    QHostAddress address;
+    if (address.setAddress(hostName)) {
+        // Reverse lookup
+// Reverse lookups using getnameinfo are broken on darwin, use gethostbyaddr instead.
+#if !defined (QT_NO_GETADDRINFO) && !defined (Q_OS_DARWIN)
+        sockaddr_in sa4;
+#ifndef QT_NO_IPV6
+        sockaddr_in6 sa6;
+#endif
+        sockaddr *sa = 0;
+        QT_SOCKLEN_T saSize = 0;
+        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());
+        }
+#ifndef QT_NO_IPV6
+        else {
+            sa = (sockaddr *)&sa6;
+            saSize = sizeof(sa6);
+            memset(&sa6, 0, sizeof(sa6));
+            sa6.sin6_family = AF_INET6;
+            memcpy(sa6.sin6_addr.s6_addr, address.toIPv6Address().c, sizeof(sa6.sin6_addr.s6_addr));
+        }
+#endif
+
+        char hbuf[NI_MAXHOST];
+        if (!sa || getnameinfo(sa, saSize, hbuf, sizeof(hbuf), 0, 0, 0) != 0) {
+            results.setError(QHostInfo::HostNotFound);
+            results.setErrorString(tr("Host not found"));
+            return results;
+        }
+        results.setHostName(QString::fromLatin1(hbuf));
+#else
+        in_addr_t inetaddr = inet_addr(hostName.toLatin1().constData());
+        struct hostent *ent = gethostbyaddr((const char *)&inetaddr, sizeof(inetaddr), AF_INET);
+        if (!ent) {
+            results.setError(QHostInfo::HostNotFound);
+            results.setErrorString(tr("Host not found"));
+            return results;
+        }
+        results.setHostName(QString::fromLatin1(ent->h_name));
+#endif
+    }
+
+#if !defined (QT_NO_GETADDRINFO)
+    // Call getaddrinfo, and place all IPv4 addresses at the start and
+    // the IPv6 addresses at the end of the address list in results.
+    addrinfo *res = 0;
+    struct addrinfo hints;
+    memset(&hints, 0, sizeof(hints));
+    hints.ai_family = PF_UNSPEC;
+#ifdef Q_ADDRCONFIG
+    hints.ai_flags = Q_ADDRCONFIG;
+#endif
+
+    int result = getaddrinfo(hostName.toLatin1().constData(), 0, &hints, &res);
+# ifdef Q_ADDRCONFIG
+    if (result == EAI_BADFLAGS) {
+        // if the lookup failed with AI_ADDRCONFIG set, try again without it
+        hints.ai_flags = 0;
+        result = getaddrinfo(hostName.toLatin1().constData(), 0, &hints, &res);
+    }
+# endif
+
+    if (result == 0) {
+        addrinfo *node = res;
+        QList<QHostAddress> addresses;
+        while (node) {
+            if (node->ai_family == AF_INET) {
+                QHostAddress addr;
+                addr.setAddress(ntohl(((sockaddr_in *) node->ai_addr)->sin_addr.s_addr));
+                if (!addresses.contains(addr))
+                    addresses.append(addr);
+            }
+#ifndef QT_NO_IPV6
+            else if (node->ai_family == AF_INET6) {
+                QHostAddress addr;
+                addr.setAddress(((sockaddr_in6 *) node->ai_addr)->sin6_addr.s6_addr);
+                if (!addresses.contains(addr))
+                    addresses.append(addr);
+            }
+#endif
+            node = node->ai_next;
+        }
+        if (addresses.isEmpty() && node == 0) {
+            // Reached the end of the list, but no addresses were found; this
+            // means the list contains one or more unknown address types.
+            results.setError(QHostInfo::UnknownError);
+            results.setErrorString(tr("Unknown address type"));
+        }
+
+        results.setAddresses(addresses);
+        freeaddrinfo(res);
+    } else if (result == EAI_NONAME
+               || result ==  EAI_FAIL
+#ifdef EAI_NODATA
+	       // EAI_NODATA is deprecated in RFC 3493
+	       || result == EAI_NODATA
+#endif
+	       ) {
+        results.setError(QHostInfo::HostNotFound);
+        results.setErrorString(tr("Host not found"));
+    } else {
+        results.setError(QHostInfo::UnknownError);
+        results.setErrorString(QString::fromLocal8Bit(gai_strerror(result)));
+    }
+
+#else
+    // Fall back to gethostbyname for platforms that don't define
+    // getaddrinfo. gethostbyname does not support IPv6, and it's not
+    // reentrant on all platforms. For now this is okay since we only
+    // use one QHostInfoAgent, but if more agents are introduced, locking
+    // must be provided.
+    QMutexLocker locker(::getHostByNameMutex());
+    hostent *result = gethostbyname(hostName.toLatin1().constData());
+    if (result) {
+        if (result->h_addrtype == AF_INET) {
+            QList<QHostAddress> addresses;
+            for (char **p = result->h_addr_list; *p != 0; p++) {
+                QHostAddress addr;
+                addr.setAddress(ntohl(*((quint32 *)*p)));
+                if (!addresses.contains(addr))
+                    addresses.prepend(addr);
+            }
+            results.setAddresses(addresses);
+        } else {
+            results.setError(QHostInfo::UnknownError);
+            results.setErrorString(tr("Unknown address type"));
+        }
+    } else if (h_errno == HOST_NOT_FOUND || h_errno == NO_DATA
+               || h_errno == NO_ADDRESS) {
+        results.setError(QHostInfo::HostNotFound);
+        results.setErrorString(tr("Host not found"));
+    } else {
+        results.setError(QHostInfo::UnknownError);
+        results.setErrorString(tr("Unknown error"));
+    }
+#endif //  !defined (QT_NO_GETADDRINFO)
+
+#if defined(QHOSTINFO_DEBUG)
+    if (results.error() != QHostInfo::NoError) {
+        qDebug("QHostInfoAgent::fromName(): error #%d %s",
+               h_errno, 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::fromName(): found %i entries for \"%s\": {%s}",
+               addresses.count(), hostName.toLatin1().constData(),
+               tmp.toLatin1().constData());
+    }
+#endif
+    return results;
+}
+
+QString QHostInfo::localHostName()
+{
+    char hostName[512];
+    if (gethostname(hostName, sizeof(hostName)) == -1)
+        return QString();
+    hostName[sizeof(hostName) - 1] = '\0';
+    return QString::fromLocal8Bit(hostName);
+}
+
+QString QHostInfo::localDomainName()
+{
+    resolveLibrary();
+    if (local_res_ninit) {
+        // using thread-safe version
+        res_state_ptr state = res_state_ptr(qMalloc(sizeof(*state)));
+        memset(state, 0, sizeof(*state));
+        local_res_ninit(state);
+        QString domainName = QUrl::fromAce(state->defdname);
+        if (domainName.isEmpty())
+            domainName = QUrl::fromAce(state->dnsrch[0]);
+        local_res_nclose(state);
+        qFree(state);
+
+        return domainName;
+    }
+
+    if (local_res_init && local_res) {
+        // using thread-unsafe version
+
+#if defined(QT_NO_GETADDRINFO)
+        // We have to call res_init to be sure that _res was initialized
+        // So, for systems without getaddrinfo (which is thread-safe), we lock the mutex too
+        QMutexLocker locker(::getHostByNameMutex());
+#endif
+        local_res_init();
+        QString domainName = QUrl::fromAce(local_res->defdname);
+        if (domainName.isEmpty())
+            domainName = QUrl::fromAce(local_res->dnsrch[0]);
+        return domainName;
+    }
+
+    // nothing worked, try doing it by ourselves:
+    QFile resolvconf;
+#if defined(_PATH_RESCONF)
+    resolvconf.setFileName(QFile::decodeName(_PATH_RESCONF));
+#else
+    resolvconf.setFileName(QLatin1String("/etc/resolv.conf"));
+#endif
+    if (!resolvconf.open(QIODevice::ReadOnly))
+        return QString();       // failure
+
+    QString domainName;
+    while (!resolvconf.atEnd()) {
+        QByteArray line = resolvconf.readLine().trimmed();
+        if (line.startsWith("domain "))
+            return QUrl::fromAce(line.mid(sizeof "domain " - 1).trimmed());
+
+        // in case there's no "domain" line, fall back to the first "search" entry
+        if (domainName.isEmpty() && line.startsWith("search ")) {
+            QByteArray searchDomain = line.mid(sizeof "search " - 1).trimmed();
+            int pos = searchDomain.indexOf(' ');
+            if (pos != -1)
+                searchDomain.truncate(pos);
+            domainName = QUrl::fromAce(searchDomain);
+        }
+    }
+
+    // return the fallen-back-to searched domain
+    return domainName;
+}
+
+QT_END_NAMESPACE