--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/network/kernel/qhostinfo_unix.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,389 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+//#define QHOSTINFO_DEBUG
+
+#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>
+#include <private/qnet_unix_p.h>
+
+#include <sys/types.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#if defined(Q_OS_VXWORKS)
+# include <hostLib.h>
+#else
+# include <resolv.h>
+#endif
+
+#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;
+
+#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) && !defined (Q_OS_SYMBIAN)
+ 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.setHostName(QString::fromLatin1(hbuf));
+#else
+ in_addr_t inetaddr = qt_safe_inet_addr(hostName.toLatin1().constData());
+ struct hostent *ent = gethostbyaddr((const char *)&inetaddr, sizeof(inetaddr), AF_INET);
+ if (ent)
+ results.setHostName(QString::fromLatin1(ent->h_name));
+#endif
+
+ 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() ? QObject::tr("No host name given") : QObject::tr("Invalid hostname"));
+ return results;
+ }
+
+#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(aceHostname.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(aceHostname.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(aceHostname.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"));
+ }
+#if !defined(Q_OS_VXWORKS)
+ } 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"));
+#endif
+ } 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()
+{
+#if !defined(Q_OS_VXWORKS)
+ resolveLibrary();
+ if (local_res_ninit) {
+ // using thread-safe version
+ res_state_ptr state = res_state_ptr(qMalloc(sizeof(*state)));
+ Q_CHECK_PTR(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;
+ }
+#endif
+ // 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